Merge 'main' into test/oath-integration-test

.github/workflows/android.yaml

@@ -16,6 +16,7 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
+          flutter-version: '3.0.5'
       - run: |
           flutter config
           flutter --version
@@ -36,6 +37,10 @@ jobs:
           flutter analyze
         working-directory: ./app
 
+      - name: Generate Third party licenses
+        run: ./gradlew collectLicenses
+        working-directory: ./app/android
+
       - name: Build the App
         run: flutter build apk --release
         env:

.github/workflows/linux.yml

@@ -33,6 +33,7 @@ jobs:
     - uses: subosito/flutter-action@v2
       with:
         channel: 'stable'
+        flutter-version: '3.0.5'
     - run: flutter config --enable-linux-desktop
     - run: flutter --version
 

.github/workflows/macos.yml

@@ -31,6 +31,7 @@ jobs:
       with:
         channel: 'stable'
         architecture: 'x64'
+        flutter-version: '3.0.5'
     - run: flutter config --enable-macos-desktop
     - run: flutter --version
 

.github/workflows/windows.yml

@@ -29,6 +29,7 @@ jobs:
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
+          flutter-version: '3.0.5'
       - run: flutter config --enable-windows-desktop
       - run: flutter --version
 

.metadata

@@ -1,10 +1,30 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled and should not be manually edited.
+# This file should be version controlled.
 
 version:
-  revision: 2901cd720879ba3d7ba7cbd7d447ec9e80f937b6
-  channel: beta
+  revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+  channel: stable
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+      base_revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+    - platform: windows
+      create_revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+      base_revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

android/.gitignore

@@ -1,8 +1,5 @@
-gradle-wrapper.jar
 /.gradle
 /captures/
-/gradlew
-/gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java
 

android/app/build.gradle

@@ -27,10 +27,11 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlinx-serialization'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+apply plugin: 'com.google.android.gms.oss-licenses-plugin'
 
 android {
 
-    compileSdkVersion flutter.compileSdkVersion
+    compileSdkVersion 32
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -46,7 +47,7 @@ android {
     }
 
     defaultConfig {
-        applicationId "com.yubico.yubioath"
+        applicationId "com.yubico.yubioath.preview"
         minSdkVersion project.minSdkVersion
         targetSdkVersion project.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
@@ -68,6 +69,7 @@ android {
 }
 
 apply from: "signing.gradle"
+apply from: "collect_licenses.gradle"
 
 flutter {
     source '../..'
@@ -79,16 +81,19 @@ dependencies {
     api "com.yubico.yubikit:oath:$project.yubiKitVersion"
     api "com.yubico.yubikit:support:$project.yubiKitVersion"
 
-    implementation 'org.jetbrains.kotlinx:kotlinx-serialization-core:1.0.0-RC'
+    implementation 'org.jetbrains.kotlinx:kotlinx-serialization-core:1.3.2'
     implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.2'
 
     // Lifecycle
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1'
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
 
-    implementation 'androidx.fragment:fragment-ktx:1.4.1'
+    implementation 'androidx.fragment:fragment-ktx:1.5.2'
+    implementation 'androidx.preference:preference-ktx:1.2.0'
+
 
     // testing dependencies
     testImplementation "junit:junit:$project.junitVersion"
     testImplementation "org.mockito:mockito-core:$project.mockitoVersion"
+    testImplementation 'android.arch.core:core-testing:1.1.1'
 }

android/app/collect_licenses.gradle

@@ -0,0 +1,91 @@
+import groovy.json.JsonOutput
+
+import java.util.regex.Pattern
+
+def collectLicenses(File rootDir, File ossPluginResDir, File outDir) {
+
+    def pattern = Pattern.compile("^(\\d+:\\d+) (.*)\$")
+
+    // third_party_licenses file generated by oss-licenses-plugin
+    def licenses = new File(ossPluginResDir, "third_party_licenses")
+
+    // third_party_license_metadata file generated by oss-licenses-plugin
+    def metadata = new File(ossPluginResDir, "third_party_license_metadata")
+
+    // check that files exist, are readable and output directory is writable
+    if (!licenses.canRead()) {
+        throw new GradleException("Cannot find/read ${licenses.absolutePath}")
+    }
+
+    if (!metadata.canRead()) {
+        throw new GradleException("Cannot find/read ${metadata.absolutePath}")
+    }
+
+    if (!outDir.exists() || !outDir.canExecute()) {
+        if (!outDir.mkdir()) {
+            throw new GradleException("Failed to create ${outDir.absolutePath}")
+        }
+    }
+
+    def outFile = new File(outDir, "android.json")
+    if (outFile.exists()) {
+        outFile.delete()
+    }
+
+    println "Used licenses:"
+    var licenseMap = [:]
+    var index = 0
+    licenses.eachLine { line ->
+        def indices = "$index:${line.length()}"
+        println line
+        licenseMap[indices] = line
+        index += line.length() + 1
+    }
+
+    println "Modules:"
+    def licenseList = []
+    metadata.eachLine { line ->
+        def matcher = pattern.matcher(line)
+        if (matcher.find()) {
+            def indices = matcher.group(1)
+            def packageName = matcher.group(2)
+            if (licenseMap.get(indices) == null) {
+                throw new GradleException("Unexpected license indexes: $indices for $packageName")
+            }
+            println packageName + " license: ${licenseMap[indices]}"
+            licenseList.add(PackageName: packageName, PackageLicense: licenseMap[indices])
+        } else {
+            throw new GradleException("Unexpected project license line: $line")
+        }
+    }
+
+    // add zxing_licenses which are not detected
+    println "adding zxing licenses"
+    licenseList.add(PackageName: "ZXing Core (3.3.0)", PackageLicense: "https://www.apache.org/licenses/LICENSE-2.0.txt")
+    licenseList.add(PackageName: "ZXing Android Core (3.3.0)", PackageLicense: "https://www.apache.org/licenses/LICENSE-2.0.txt")
+
+    outFile.write(new JsonOutput().toJson(licenseList))
+    println "Created ${outFile.absolutePath}"
+
+    // copy license assets to flutter resources
+    def licensesDir = new File(rootDir, "licenses/");
+    copy {
+        from(licensesDir.absolutePath) {
+            include "**/*txt"
+            include "**/*json"
+        }
+        into outDir
+    }
+
+    // remove not needed oss-licenses-plugin files
+    licenses.delete()
+    metadata.delete()
+}
+
+task collectLicenses() {
+    dependsOn(":app:releaseOssLicensesTask")
+    doLast {
+        def ossPluginResDir = new File(project.buildDir, "generated/third_party_licenses/release/res/raw/")
+        collectLicenses(project.rootDir, ossPluginResDir, new File(project.rootDir.parent, "assets/licenses/android/"))
+    }
+}

android/app/src/main/AndroidManifest.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.yubico.authenticator">
 
@@ -15,15 +16,18 @@
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_label">
+
         <activity
             android:name=".MainActivity"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:exported="true"
             android:hardwareAccelerated="true"
-            android:launchMode="singleTop"
+            android:launchMode="singleTask"
+            android:resizeableActivity="false"
             android:screenOrientation="portrait"
             android:theme="@style/LaunchTheme"
             android:windowSoftInputMode="adjustResize">
+
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
@@ -41,10 +45,27 @@
                 android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
                 android:resource="@xml/device_filter" />
         </activity>
+
+        <activity
+            android:name=".NdefActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/NdefActivityTheme">
+            <intent-filter>
+                <action android:name="android.nfc.action.NDEF_DISCOVERED" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data
+                    android:host="my.yubico.com"
+                    android:scheme="https" />
+            </intent-filter>
+
+        </activity>
+
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
-</manifest>
+
+</manifest>

android/app/src/main/java/com/yubico/authenticator/api/Pigeon.java

@@ -1,662 +0,0 @@
-// Autogenerated from Pigeon (v3.1.6), do not edit directly.
-// See also: https://pub.dev/packages/pigeon
-
-package com.yubico.authenticator.api;
-
-import android.util.Log;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import io.flutter.plugin.common.BasicMessageChannel;
-import io.flutter.plugin.common.BinaryMessenger;
-import io.flutter.plugin.common.MessageCodec;
-import io.flutter.plugin.common.StandardMessageCodec;
-import java.io.ByteArrayOutputStream;
-import java.nio.ByteBuffer;
-import java.util.Arrays;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.HashMap;
-
-/** Generated class from Pigeon. */
-@SuppressWarnings({"unused", "unchecked", "CodeBlock2Expr", "RedundantSuppression"})
-public class Pigeon {
-
-  /** Generated class from Pigeon that represents data sent in messages. */
-  public static class UnlockResponse {
-    private @Nullable Boolean isUnlocked;
-    public @Nullable Boolean getIsUnlocked() { return isUnlocked; }
-    public void setIsUnlocked(@Nullable Boolean setterArg) {
-      this.isUnlocked = setterArg;
-    }
-
-    private @Nullable Boolean isRemembered;
-    public @Nullable Boolean getIsRemembered() { return isRemembered; }
-    public void setIsRemembered(@Nullable Boolean setterArg) {
-      this.isRemembered = setterArg;
-    }
-
-    public static final class Builder {
-      private @Nullable Boolean isUnlocked;
-      public @NonNull Builder setIsUnlocked(@Nullable Boolean setterArg) {
-        this.isUnlocked = setterArg;
-        return this;
-      }
-      private @Nullable Boolean isRemembered;
-      public @NonNull Builder setIsRemembered(@Nullable Boolean setterArg) {
-        this.isRemembered = setterArg;
-        return this;
-      }
-      public @NonNull UnlockResponse build() {
-        UnlockResponse pigeonReturn = new UnlockResponse();
-        pigeonReturn.setIsUnlocked(isUnlocked);
-        pigeonReturn.setIsRemembered(isRemembered);
-        return pigeonReturn;
-      }
-    }
-    @NonNull Map<String, Object> toMap() {
-      Map<String, Object> toMapResult = new HashMap<>();
-      toMapResult.put("isUnlocked", isUnlocked);
-      toMapResult.put("isRemembered", isRemembered);
-      return toMapResult;
-    }
-    static @NonNull UnlockResponse fromMap(@NonNull Map<String, Object> map) {
-      UnlockResponse pigeonResult = new UnlockResponse();
-      Object isUnlocked = map.get("isUnlocked");
-      pigeonResult.setIsUnlocked((Boolean)isUnlocked);
-      Object isRemembered = map.get("isRemembered");
-      pigeonResult.setIsRemembered((Boolean)isRemembered);
-      return pigeonResult;
-    }
-  }
-
-  public interface Result<T> {
-    void success(T result);
-    void error(Throwable error);
-  }
-  private static class OathApiCodec extends StandardMessageCodec {
-    public static final OathApiCodec INSTANCE = new OathApiCodec();
-    private OathApiCodec() {}
-    @Override
-    protected Object readValueOfType(byte type, ByteBuffer buffer) {
-      switch (type) {
-        case (byte)128:         
-          return UnlockResponse.fromMap((Map<String, Object>) readValue(buffer));
-        
-        default:        
-          return super.readValueOfType(type, buffer);
-        
-      }
-    }
-    @Override
-    protected void writeValue(ByteArrayOutputStream stream, Object value)     {
-      if (value instanceof UnlockResponse) {
-        stream.write(128);
-        writeValue(stream, ((UnlockResponse) value).toMap());
-      } else 
-{
-        super.writeValue(stream, value);
-      }
-    }
-  }
-
-  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
-  public interface OathApi {
-    void reset(Result<Void> result);
-    void unlock(@NonNull String password, @NonNull Boolean remember, Result<UnlockResponse> result);
-    void setPassword(@Nullable String currentPassword, @NonNull String newPassword, Result<Void> result);
-    void unsetPassword(@NonNull String currentPassword, Result<Void> result);
-    void forgetPassword(Result<Void> result);
-    void addAccount(@NonNull String uri, @NonNull Boolean requireTouch, Result<String> result);
-    void renameAccount(@NonNull String uri, @NonNull String name, @Nullable String issuer, Result<String> result);
-    void deleteAccount(@NonNull String uri, Result<Void> result);
-    void refreshCodes(Result<String> result);
-    void calculate(@NonNull String uri, Result<String> result);
-
-    /** The codec used by OathApi. */
-    static MessageCodec<Object> getCodec() {
-      return OathApiCodec.INSTANCE;
-    }
-
-    /** Sets up an instance of `OathApi` to handle messages through the `binaryMessenger`. */
-    static void setup(BinaryMessenger binaryMessenger, OathApi api) {
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.reset", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.reset(resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.unlock", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String passwordArg = (String)args.get(0);
-              if (passwordArg == null) {
-                throw new NullPointerException("passwordArg unexpectedly null.");
-              }
-              Boolean rememberArg = (Boolean)args.get(1);
-              if (rememberArg == null) {
-                throw new NullPointerException("rememberArg unexpectedly null.");
-              }
-              Result<UnlockResponse> resultCallback = new Result<UnlockResponse>() {
-                public void success(UnlockResponse result) {
-                  wrapped.put("result", result);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.unlock(passwordArg, rememberArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.setPassword", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String currentPasswordArg = (String)args.get(0);
-              String newPasswordArg = (String)args.get(1);
-              if (newPasswordArg == null) {
-                throw new NullPointerException("newPasswordArg unexpectedly null.");
-              }
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.setPassword(currentPasswordArg, newPasswordArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.unsetPassword", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String currentPasswordArg = (String)args.get(0);
-              if (currentPasswordArg == null) {
-                throw new NullPointerException("currentPasswordArg unexpectedly null.");
-              }
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.unsetPassword(currentPasswordArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.forgetPassword", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.forgetPassword(resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.addAccount", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String uriArg = (String)args.get(0);
-              if (uriArg == null) {
-                throw new NullPointerException("uriArg unexpectedly null.");
-              }
-              Boolean requireTouchArg = (Boolean)args.get(1);
-              if (requireTouchArg == null) {
-                throw new NullPointerException("requireTouchArg unexpectedly null.");
-              }
-              Result<String> resultCallback = new Result<String>() {
-                public void success(String result) {
-                  wrapped.put("result", result);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.addAccount(uriArg, requireTouchArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.renameAccount", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String uriArg = (String)args.get(0);
-              if (uriArg == null) {
-                throw new NullPointerException("uriArg unexpectedly null.");
-              }
-              String nameArg = (String)args.get(1);
-              if (nameArg == null) {
-                throw new NullPointerException("nameArg unexpectedly null.");
-              }
-              String issuerArg = (String)args.get(2);
-              Result<String> resultCallback = new Result<String>() {
-                public void success(String result) {
-                  wrapped.put("result", result);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.renameAccount(uriArg, nameArg, issuerArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.deleteAccount", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String uriArg = (String)args.get(0);
-              if (uriArg == null) {
-                throw new NullPointerException("uriArg unexpectedly null.");
-              }
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.deleteAccount(uriArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.refreshCodes", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              Result<String> resultCallback = new Result<String>() {
-                public void success(String result) {
-                  wrapped.put("result", result);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.refreshCodes(resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.OathApi.calculate", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              String uriArg = (String)args.get(0);
-              if (uriArg == null) {
-                throw new NullPointerException("uriArg unexpectedly null.");
-              }
-              Result<String> resultCallback = new Result<String>() {
-                public void success(String result) {
-                  wrapped.put("result", result);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.calculate(uriArg, resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-    }
-  }
-  private static class AppApiCodec extends StandardMessageCodec {
-    public static final AppApiCodec INSTANCE = new AppApiCodec();
-    private AppApiCodec() {}
-  }
-
-  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
-  public interface AppApi {
-    void setContext(@NonNull Long subPageIndex, Result<Void> result);
-
-    /** The codec used by AppApi. */
-    static MessageCodec<Object> getCodec() {
-      return AppApiCodec.INSTANCE;
-    }
-
-    /** Sets up an instance of `AppApi` to handle messages through the `binaryMessenger`. */
-    static void setup(BinaryMessenger binaryMessenger, AppApi api) {
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.AppApi.setContext", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              ArrayList<Object> args = (ArrayList<Object>)message;
-              Number subPageIndexArg = (Number)args.get(0);
-              if (subPageIndexArg == null) {
-                throw new NullPointerException("subPageIndexArg unexpectedly null.");
-              }
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.setContext((subPageIndexArg == null) ? null : subPageIndexArg.longValue(), resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-    }
-  }
-  private static class FOathApiCodec extends StandardMessageCodec {
-    public static final FOathApiCodec INSTANCE = new FOathApiCodec();
-    private FOathApiCodec() {}
-  }
-
-  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
-  public static class FOathApi {
-    private final BinaryMessenger binaryMessenger;
-    public FOathApi(BinaryMessenger argBinaryMessenger){
-      this.binaryMessenger = argBinaryMessenger;
-    }
-    public interface Reply<T> {
-      void reply(T reply);
-    }
-    static MessageCodec<Object> getCodec() {
-      return FOathApiCodec.INSTANCE;
-    }
-
-    public void updateSession(@NonNull String sessionJsonArg, Reply<Void> callback) {
-      BasicMessageChannel<Object> channel =
-          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.FOathApi.updateSession", getCodec());
-      channel.send(new ArrayList<Object>(Arrays.asList(sessionJsonArg)), channelReply -> {
-        callback.reply(null);
-      });
-    }
-    public void updateOathCredentials(@NonNull String credentialListJsonArg, Reply<Void> callback) {
-      BasicMessageChannel<Object> channel =
-          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.FOathApi.updateOathCredentials", getCodec());
-      channel.send(new ArrayList<Object>(Arrays.asList(credentialListJsonArg)), channelReply -> {
-        callback.reply(null);
-      });
-    }
-  }
-  private static class FManagementApiCodec extends StandardMessageCodec {
-    public static final FManagementApiCodec INSTANCE = new FManagementApiCodec();
-    private FManagementApiCodec() {}
-  }
-
-  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
-  public static class FManagementApi {
-    private final BinaryMessenger binaryMessenger;
-    public FManagementApi(BinaryMessenger argBinaryMessenger){
-      this.binaryMessenger = argBinaryMessenger;
-    }
-    public interface Reply<T> {
-      void reply(T reply);
-    }
-    static MessageCodec<Object> getCodec() {
-      return FManagementApiCodec.INSTANCE;
-    }
-
-    public void updateDeviceInfo(@NonNull String deviceInfoJsonArg, Reply<Void> callback) {
-      BasicMessageChannel<Object> channel =
-          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.FManagementApi.updateDeviceInfo", getCodec());
-      channel.send(new ArrayList<Object>(Arrays.asList(deviceInfoJsonArg)), channelReply -> {
-        callback.reply(null);
-      });
-    }
-  }
-  private static class FDialogApiCodec extends StandardMessageCodec {
-    public static final FDialogApiCodec INSTANCE = new FDialogApiCodec();
-    private FDialogApiCodec() {}
-  }
-
-  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
-  public static class FDialogApi {
-    private final BinaryMessenger binaryMessenger;
-    public FDialogApi(BinaryMessenger argBinaryMessenger){
-      this.binaryMessenger = argBinaryMessenger;
-    }
-    public interface Reply<T> {
-      void reply(T reply);
-    }
-    static MessageCodec<Object> getCodec() {
-      return FDialogApiCodec.INSTANCE;
-    }
-
-    public void showDialogApi(@NonNull String dialogMessageArg, Reply<Void> callback) {
-      BasicMessageChannel<Object> channel =
-          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.FDialogApi.showDialogApi", getCodec());
-      channel.send(new ArrayList<Object>(Arrays.asList(dialogMessageArg)), channelReply -> {
-        callback.reply(null);
-      });
-    }
-    public void closeDialogApi(Reply<Void> callback) {
-      BasicMessageChannel<Object> channel =
-          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.FDialogApi.closeDialogApi", getCodec());
-      channel.send(null, channelReply -> {
-        callback.reply(null);
-      });
-    }
-  }
-  private static class HDialogApiCodec extends StandardMessageCodec {
-    public static final HDialogApiCodec INSTANCE = new HDialogApiCodec();
-    private HDialogApiCodec() {}
-  }
-
-  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
-  public interface HDialogApi {
-    void dialogClosed(Result<Void> result);
-
-    /** The codec used by HDialogApi. */
-    static MessageCodec<Object> getCodec() {
-      return HDialogApiCodec.INSTANCE;
-    }
-
-    /** Sets up an instance of `HDialogApi` to handle messages through the `binaryMessenger`. */
-    static void setup(BinaryMessenger binaryMessenger, HDialogApi api) {
-      {
-        BasicMessageChannel<Object> channel =
-            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.HDialogApi.dialogClosed", getCodec());
-        if (api != null) {
-          channel.setMessageHandler((message, reply) -> {
-            Map<String, Object> wrapped = new HashMap<>();
-            try {
-              Result<Void> resultCallback = new Result<Void>() {
-                public void success(Void result) {
-                  wrapped.put("result", null);
-                  reply.reply(wrapped);
-                }
-                public void error(Throwable error) {
-                  wrapped.put("error", wrapError(error));
-                  reply.reply(wrapped);
-                }
-              };
-
-              api.dialogClosed(resultCallback);
-            }
-            catch (Error | RuntimeException exception) {
-              wrapped.put("error", wrapError(exception));
-              reply.reply(wrapped);
-            }
-          });
-        } else {
-          channel.setMessageHandler(null);
-        }
-      }
-    }
-  }
-  private static Map<String, Object> wrapError(Throwable exception) {
-    Map<String, Object> errorMap = new HashMap<>();
-    errorMap.put("message", exception.toString());
-    errorMap.put("code", exception.getClass().getSimpleName());
-    errorMap.put("details", "Cause: " + exception.getCause() + ", Stacktrace: " + Log.getStackTraceString(exception));
-    return errorMap;
-  }
-}

android/app/src/main/kotlin/com/yubico/authenticator/AppContext.kt

@@ -1,31 +1,27 @@
 package com.yubico.authenticator
 
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import com.yubico.authenticator.api.Pigeon
 import com.yubico.authenticator.logging.Log
 import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
+import kotlinx.coroutines.CoroutineScope
 
-enum class OperationContext(val value: Long) {
-    Oath(0), Yubikey(1), Invalid(-1);
-
-    companion object {
-        fun getByValue(value: Long) = values().firstOrNull { it.value == value } ?: Invalid
-    }
-}
-
-class AppContext(messenger: BinaryMessenger) : Pigeon.AppApi {
-    private var _appContext = MutableLiveData(OperationContext.Oath)
-    val appContext: LiveData<OperationContext> = _appContext
+class AppContext(messenger: BinaryMessenger, coroutineScope: CoroutineScope, private val appViewModel: MainViewModel)  {
+    private val channel = MethodChannel(messenger, "android.state.appContext")
 
     init {
-        Pigeon.AppApi.setup(messenger, this)
+        channel.setHandler(coroutineScope) { method, args ->
+            when (method) {
+                "setContext" -> setContext(args["index"] as Int)
+                else -> throw NotImplementedError()
+            }
+        }
     }
 
-    override fun setContext(subPageIndex: Long, result: Pigeon.Result<Void>) {
-        _appContext.value = OperationContext.getByValue(subPageIndex)
-        Log.d(TAG, "App context is now $_appContext")
-        result.success(null)
+    private suspend fun setContext(subPageIndex: Int): String {
+        val appContext = OperationContext.getByValue(subPageIndex)
+        appViewModel.setAppContext(appContext)
+        Log.d(TAG, "App context is now $appContext")
+        return NULL
     }
 
     companion object {

android/app/src/main/kotlin/com/yubico/authenticator/AppContextManager.kt

@@ -0,0 +1,11 @@
+package com.yubico.authenticator
+
+import com.yubico.yubikit.core.YubiKeyDevice
+
+/**
+ * Provides behavior to run when a YubiKey is inserted/tapped for a specific view of the app.
+ */
+interface AppContextManager {
+    suspend fun processYubiKey(device: YubiKeyDevice)
+    fun dispose()
+}

android/app/src/main/kotlin/com/yubico/authenticator/AppPreferences.kt

@@ -0,0 +1,34 @@
+package com.yubico.authenticator
+
+import android.content.Context
+import android.content.SharedPreferences
+
+class AppPreferences(context: Context) {
+    companion object {
+        const val PREFS_FILE = "FlutterSharedPreferences"
+        const val PREF_NFC_OPEN_APP = "flutter.prefNfcOpenApp"
+        const val PREF_NFC_BYPASS_TOUCH = "flutter.prefNfcBypassTouch"
+        const val PREF_NFC_COPY_OTP = "flutter.prefNfcCopyOtp"
+
+        const val PREF_CLIP_KBD_LAYOUT = "flutter.prefClipKbdLayout"
+        const val DEFAULT_CLIP_KBD_LAYOUT = "US"
+    }
+
+    private val prefs: SharedPreferences =
+        context.getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE)
+
+    val openAppOnNfcTap: Boolean
+        get() = prefs.getBoolean(PREF_NFC_OPEN_APP, true)
+
+    val bypassTouchOnNfcTap: Boolean
+        get() = prefs.getBoolean(PREF_NFC_BYPASS_TOUCH, false)
+
+    val copyOtpOnNfcTap: Boolean
+        get() = prefs.getBoolean(PREF_NFC_COPY_OTP, false)
+
+    val clipKbdLayout: String
+        get() = prefs.getString(
+            PREF_CLIP_KBD_LAYOUT,
+            DEFAULT_CLIP_KBD_LAYOUT
+        )!!
+}

android/app/src/main/kotlin/com/yubico/authenticator/ChannelHelper.kt

@@ -0,0 +1,105 @@
+package com.yubico.authenticator
+
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MethodChannel
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.encodeToString
+import java.io.Closeable
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+import kotlin.coroutines.suspendCoroutine
+
+/**
+ * Observes a LiveData value, sending each change to Flutter via an EventChannel.
+ */
+inline fun <reified T> LiveData<T>.streamTo(lifecycleOwner: LifecycleOwner, messenger: BinaryMessenger, channelName: String): Closeable {
+    val channel = EventChannel(messenger, channelName)
+    var sink: EventChannel.EventSink? = null
+
+    channel.setStreamHandler(object : EventChannel.StreamHandler {
+        override fun onListen(arguments: Any?, events: EventChannel.EventSink) {
+            sink = events
+            events.success(value?.let(jsonSerializer::encodeToString) ?: NULL)
+        }
+
+        override fun onCancel(arguments: Any?) {
+            sink = null
+        }
+    })
+
+    val observer = Observer<T> {
+        sink?.success(it?.let(jsonSerializer::encodeToString) ?: NULL)
+    }
+    observe(lifecycleOwner, observer)
+
+    return Closeable {
+        removeObserver(observer)
+        channel.setStreamHandler(null)
+    }
+}
+
+typealias MethodHandler = suspend (method: String, args: Map<String, Any?>) -> String
+
+/**
+ * Coroutine-based handing of MethodChannel methods called from Flutter.
+ */
+fun MethodChannel.setHandler(scope: CoroutineScope, handler: MethodHandler) {
+    setMethodCallHandler { call, result ->
+        // N.B. Arguments from Flutter are passed as a Map of basic types. We may want to
+        // consider JSON encoding if we need to pass more complex structures.
+        // Return values are always JSON strings.
+        val args = call.arguments<Map<String, Any?>>() ?: mapOf()
+        scope.launch {
+            try {
+                val response = handler.invoke(call.method, args)
+                result.success(response)
+            } catch (notImplemented: NotImplementedError) {
+                result.notImplemented()
+            } catch (error: Throwable) {
+                result.error(
+                    error.javaClass.simpleName,
+                    error.toString(),
+                    "Cause: " + error.cause + ", Stacktrace: " + android.util.Log.getStackTraceString(
+                        error
+                    )
+                )
+            }
+        }
+    }
+}
+
+/**
+ * Coroutine-based method invocation to call a Flutter method and get a result.
+ */
+suspend fun MethodChannel.invoke(method: String, args: Any?): Any? =
+    withContext(Dispatchers.Main) {
+        suspendCoroutine { continuation ->
+            invokeMethod(
+                method,
+                args,
+                object : MethodChannel.Result {
+                    override fun success(result: Any?) {
+                        continuation.resume(result)
+                    }
+
+                    override fun error(
+                        errorCode: String,
+                        errorMessage: String?,
+                        errorDetails: Any?
+                    ) {
+                        continuation.resumeWithException(Exception("$errorCode: $errorMessage - $errorDetails"))
+                    }
+
+                    override fun notImplemented() {
+                        continuation.resumeWithException(NotImplementedError("Method not implemented: $method"))
+                    }
+                })
+        }
+    }

android/app/src/main/kotlin/com/yubico/authenticator/DialogManager.kt

@@ -1,55 +1,82 @@
 package com.yubico.authenticator
 
-import com.yubico.authenticator.api.Pigeon.*
-import com.yubico.authenticator.logging.Log
 import io.flutter.plugin.common.BinaryMessenger
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
+import io.flutter.plugin.common.MethodChannel
+import kotlinx.coroutines.*
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
 
-typealias OnDialogClosed = () -> Unit
-typealias OnDialogCancelled = () -> Unit
+typealias OnDialogCancelled = suspend () -> Unit
 
-class DialogManager(messenger: BinaryMessenger, private var coroutineScope: CoroutineScope) :
-    HDialogApi {
+enum class Icon(val value: String) {
+    NFC("nfc"),
+    SUCCESS("success"),
+    ERROR("error");
+}
 
-    private val _fDialogApi = FDialogApi(messenger)
+class DialogManager(messenger: BinaryMessenger, private val coroutineScope: CoroutineScope) {
+    private val channel =
+        MethodChannel(messenger, "com.yubico.authenticator.channel.dialog")
 
     private var onCancelled: OnDialogCancelled? = null
 
     init {
-        HDialogApi.setup(messenger, this)
-    }
-
-    fun showDialog(message: String, cancelled: OnDialogCancelled?) =
-        coroutineScope.launch(Dispatchers.Main) {
-            _fDialogApi.showDialogApi(message) { }
-        }.also {
-            onCancelled = cancelled
-        }
-
-    fun closeDialog(onClosed: OnDialogClosed) {
-        _fDialogApi.closeDialogApi {
-            coroutineScope.launch(Dispatchers.Main) {
-                onClosed()
+        channel.setHandler(coroutineScope) { method, _ ->
+            when (method) {
+                "cancel" -> dialogClosed()
+                else -> throw NotImplementedError()
             }
         }
     }
 
-    override fun dialogClosed(result: Result<Void>) {
+    fun showDialog(icon: Icon, title: String, description: String, cancelled: OnDialogCancelled?) {
+        onCancelled = cancelled
         coroutineScope.launch {
-            try {
-                onCancelled?.invoke()
-                result.success(null)
-            } catch (cause: Throwable) {
-                Log.d(TAG, "Failed to close dialog during User cancel action")
-                result.error(Exception("Failed to close dialog during User cancel action"))
+            channel.invoke(
+                "show",
+                Json.encodeToString(
+                    mapOf(
+                        "title" to title,
+                        "description" to description,
+                        "icon" to icon.value
+                    )
+                )
+            )
+        }
+    }
+
+    suspend fun updateDialogState(
+        icon: Icon? = null,
+        title: String? = null,
+        description: String? = null
+    ) {
+        channel.invoke(
+            "state",
+            Json.encodeToString(
+                mapOf(
+                    "title" to title,
+                    "description" to description,
+                    "icon" to icon?.value
+                )
+            )
+        )
+    }
+
+    suspend fun closeDialog() {
+        channel.invoke("close", NULL)
+    }
+
+    private suspend fun dialogClosed(): String {
+        onCancelled?.let {
+            onCancelled = null
+            withContext(Dispatchers.Main) {
+                it.invoke()
             }
         }
+        return NULL
     }
 
     companion object {
         const val TAG = "dialogManager"
     }
-
 }

android/app/src/main/kotlin/com/yubico/authenticator/JsonSerializer.kt

@@ -1,7 +1,9 @@
-package com.yubico.authenticator.oath
+package com.yubico.authenticator
 
 import kotlinx.serialization.json.Json
 
+const val NULL = "null"
+
 val jsonSerializer = Json {
     // creates properties for default values
     encodeDefaults = true

android/app/src/main/kotlin/com/yubico/authenticator/MainActivity.kt

@@ -1,5 +1,11 @@
 package com.yubico.authenticator
 
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.nfc.NfcAdapter
+import android.nfc.Tag
 import android.os.Bundle
 import android.view.WindowManager
 import androidx.activity.viewModels
@@ -7,63 +13,84 @@ import androidx.lifecycle.lifecycleScope
 import com.yubico.authenticator.logging.FlutterLog
 import com.yubico.authenticator.logging.Log
 import com.yubico.authenticator.oath.OathManager
+import com.yubico.authenticator.oath.OathViewModel
 import com.yubico.yubikit.android.YubiKitManager
 import com.yubico.yubikit.android.transport.nfc.NfcConfiguration
 import com.yubico.yubikit.android.transport.nfc.NfcNotAvailable
+import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
 import com.yubico.yubikit.android.transport.usb.UsbConfiguration
 import com.yubico.yubikit.core.Logger
+import com.yubico.yubikit.core.YubiKeyDevice
 import io.flutter.embedding.android.FlutterFragmentActivity
 import io.flutter.embedding.engine.FlutterEngine
-import kotlinx.coroutines.Dispatchers
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
 import kotlinx.coroutines.launch
+import java.io.Closeable
+import java.util.concurrent.Executors
 import kotlin.properties.Delegates
 
+
 class MainActivity : FlutterFragmentActivity() {
     private val viewModel: MainViewModel by viewModels()
+    private val oathViewModel: OathViewModel by viewModels()
+
     private val nfcConfiguration = NfcConfiguration()
 
     private var hasNfc by Delegates.notNull<Boolean>()
 
     private lateinit var yubikit: YubiKitManager
 
+    // receives broadcasts when QR Scanner camera is closed
+    private val qrScannerCameraClosedBR = QRScannerCameraClosedBR()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        if (!BuildConfig.DEBUG) {
-            window.setFlags(
-                WindowManager.LayoutParams.FLAG_SECURE,
-                WindowManager.LayoutParams.FLAG_SECURE
-            )
-        }
+        allowScreenshots(false)
 
         yubikit = YubiKitManager(this)
 
+        setupYubiKeyDiscovery()
+        setupYubiKitLogger()
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+    }
+
+    private fun setupYubiKeyDiscovery() {
         viewModel.handleYubiKey.observe(this) {
             if (it) {
+                Log.d(TAG, "Starting usb discovery")
                 yubikit.startUsbDiscovery(UsbConfiguration()) { device ->
-                    viewModel.yubiKeyDevice.postValue(device)
-                    device.setOnClosed { viewModel.yubiKeyDevice.postValue(null) }
-                }
-                hasNfc = try {
-                    yubikit.startNfcDiscovery(nfcConfiguration, this) { device ->
-                        viewModel.yubiKeyDevice.apply {
-                            lifecycleScope.launch(Dispatchers.Main) {
-                                value = device
-                                postValue(null)
-                            }
-                        }
-                    }
-                    true
-                } catch (e: NfcNotAvailable) {
-                    false
+                    viewModel.setConnectedYubiKey(device)
+                    processYubiKey(device)
                 }
+                hasNfc = startNfcDiscovery()
             } else {
-                yubikit.stopNfcDiscovery(this)
+                stopNfcDiscovery()
                 yubikit.stopUsbDiscovery()
+                Log.d(TAG, "Stopped usb discovery")
             }
         }
+    }
 
-        setupYubiKitLogger()
+    fun startNfcDiscovery(): Boolean =
+        try {
+            Log.d(TAG, "Starting nfc discovery")
+            yubikit.startNfcDiscovery(nfcConfiguration, this, ::processYubiKey)
+            true
+        } catch (e: NfcNotAvailable) {
+            false
+        }
+
+    private fun stopNfcDiscovery() {
+        if (hasNfc) {
+            yubikit.stopNfcDiscovery(this)
+            Log.d(TAG, "Stopped nfc discovery")
+        }
     }
 
     private fun setupYubiKitLogger() {
@@ -81,10 +108,66 @@ class MainActivity : FlutterFragmentActivity() {
         })
     }
 
+    override fun onStart() {
+        super.onStart()
+        registerReceiver(qrScannerCameraClosedBR, QRScannerCameraClosedBR.intentFilter)
+    }
+
+    override fun onStop() {
+        super.onStop()
+        unregisterReceiver(qrScannerCameraClosedBR)
+    }
+
+    override fun onPause() {
+        stopNfcDiscovery()
+        super.onPause()
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        // Handle existing tag when launched from NDEF
+        val tag = intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG)
+        if(tag != null) {
+            intent.removeExtra(NfcAdapter.EXTRA_TAG)
+
+            val executor = Executors.newSingleThreadExecutor()
+            val device = NfcYubiKeyDevice(tag, nfcConfiguration.timeout, executor)
+            lifecycleScope.launch {
+                try {
+                    contextManager?.processYubiKey(device)
+                    device.remove {
+                        executor.shutdown()
+                        startNfcDiscovery()
+                    }
+                } catch (e: Throwable) {
+                    Log.e(TAG, "Error processing YubiKey in AppContextManager", e.toString())
+                }
+            }
+        } else {
+            startNfcDiscovery()
+        }
+    }
+
+    private fun processYubiKey(device: YubiKeyDevice) {
+        contextManager?.let {
+            lifecycleScope.launch {
+                try {
+                    it.processYubiKey(device)
+                } catch (e: Throwable) {
+                    Log.e(TAG, "Error processing YubiKey in AppContextManager", e.toString())
+                }
+            }
+        }
+    }
+
+    private var contextManager: AppContextManager? = null
     private lateinit var appContext: AppContext
-    private lateinit var oathManager: OathManager
     private lateinit var dialogManager: DialogManager
+    private lateinit var appPreferences: AppPreferences
     private lateinit var flutterLog: FlutterLog
+    private lateinit var flutterStreams: List<Closeable>
+    private lateinit var appMethodChannel: AppMethodChannel
 
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
@@ -92,10 +175,80 @@ class MainActivity : FlutterFragmentActivity() {
         val messenger = flutterEngine.dartExecutor.binaryMessenger
 
         flutterLog = FlutterLog(messenger)
-        appContext = AppContext(messenger)
+        appContext = AppContext(messenger, this.lifecycleScope, viewModel)
         dialogManager = DialogManager(messenger, this.lifecycleScope)
+        appPreferences = AppPreferences(this)
+        appMethodChannel = AppMethodChannel(messenger)
 
-        oathManager = OathManager(this, messenger, appContext, viewModel, dialogManager)
+        flutterStreams = listOf(
+            viewModel.deviceInfo.streamTo(this, messenger, "android.devices.deviceInfo"),
+            oathViewModel.sessionState.streamTo(this, messenger, "android.oath.sessionState"),
+            oathViewModel.credentials.streamTo(this, messenger, "android.oath.credentials"),
+        )
+
+        viewModel.appContext.observe(this) {
+            contextManager?.dispose()
+            contextManager = when(it) {
+                OperationContext.Oath -> OathManager(this, messenger, viewModel, oathViewModel, dialogManager, appPreferences)
+                else -> null
+            }
+            viewModel.connectedYubiKey.value?.let(::processYubiKey)
+        }
+    }
+
+    override fun cleanUpFlutterEngine(flutterEngine: FlutterEngine) {
+        flutterStreams.forEach { it.close() }
+        super.cleanUpFlutterEngine(flutterEngine)
+    }
+
+    companion object {
+        const val TAG = "MainActivity"
+        const val FLAG_SECURE = WindowManager.LayoutParams.FLAG_SECURE
+    }
+
+    /** We observed that some devices (Pixel 2, OnePlus 6) automatically end NFC discovery
+     * during the use of device camera when scanning QR codes. To handle NFC events correctly,
+     * this receiver restarts the YubiKit NFC discovery when the QR Scanner camera is closed.
+     */
+    class QRScannerCameraClosedBR : BroadcastReceiver() {
+        companion object {
+            val intentFilter = IntentFilter("com.yubico.authenticator.QRScannerView.CameraClosed")
+        }
+
+        override fun onReceive(context: Context?, intent: Intent?) {
+            (context as? MainActivity)?.startNfcDiscovery()
+        }
+    }
+
+    inner class AppMethodChannel(messenger: BinaryMessenger) {
+
+        private val methodChannel = MethodChannel(messenger, "app.methods")
+
+        init {
+            methodChannel.setMethodCallHandler { methodCall, result ->
+                when (methodCall.method) {
+                    "allowScreenshots" -> result.success(
+                        allowScreenshots(
+                            methodCall.arguments as Boolean,
+                        )
+                    )
+                    else -> Log.w(TAG, "Unknown app method: ${methodCall.method}")
+                }
+            }
+        }
+    }
+
+    private fun allowScreenshots(value: Boolean): Boolean {
+        // Note that FLAG_SECURE is the inverse of allowScreenshots
+        if (value) {
+            Log.d(TAG, "Clearing FLAG_SECURE (allow screenshots)")
+            window.clearFlags(FLAG_SECURE)
+        } else {
+            Log.d(TAG, "Setting FLAG_SECURE (disallow screenshots)")
+            window.setFlags(FLAG_SECURE, FLAG_SECURE)
+        }
+
+        return FLAG_SECURE != (window.attributes.flags and FLAG_SECURE)
     }
 
 }

android/app/src/main/kotlin/com/yubico/authenticator/MainViewModel.kt

@@ -3,12 +3,34 @@ package com.yubico.authenticator
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
-import com.yubico.yubikit.core.YubiKeyDevice
+import com.yubico.authenticator.device.Info
+import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
+
+enum class OperationContext(val value: Int) {
+    Oath(0), Yubikey(1), Invalid(-1);
+
+    companion object {
+        fun getByValue(value: Int) = values().firstOrNull { it.value == value } ?: Invalid
+    }
+}
 
 class MainViewModel : ViewModel() {
-
     private val _handleYubiKey = MutableLiveData(true)
     val handleYubiKey: LiveData<Boolean> = _handleYubiKey
 
-    val yubiKeyDevice = MutableLiveData<YubiKeyDevice?>()
+    private var _appContext = MutableLiveData(OperationContext.Oath)
+    val appContext: LiveData<OperationContext> = _appContext
+    fun setAppContext(appContext: OperationContext) = _appContext.postValue(appContext)
+
+    private val _connectedYubiKey = MutableLiveData<UsbYubiKeyDevice?>()
+    val connectedYubiKey: LiveData<UsbYubiKeyDevice?> = _connectedYubiKey
+    fun setConnectedYubiKey(device: UsbYubiKeyDevice) {
+        _connectedYubiKey.postValue(device)
+        device.setOnClosed { _connectedYubiKey.postValue(null) }
+    }
+
+    private val _deviceInfo = MutableLiveData<Info?>()
+    val deviceInfo: LiveData<Info?> = _deviceInfo
+
+    fun setDeviceInfo(info: Info?) = _deviceInfo.postValue(info)
 }

android/app/src/main/kotlin/com/yubico/authenticator/NdefActivity.kt

@@ -0,0 +1,117 @@
+package com.yubico.authenticator
+
+import android.app.Activity
+import android.content.*
+import android.nfc.NdefMessage
+import android.nfc.NfcAdapter
+import android.nfc.Tag
+import android.os.Build
+import android.os.Bundle
+import android.widget.Toast
+import com.yubico.authenticator.logging.Log
+import com.yubico.authenticator.yubiclip.scancode.KeyboardLayout
+import com.yubico.yubikit.core.util.NdefUtils
+import java.nio.charset.StandardCharsets
+
+typealias ResourceId = Int
+
+class NdefActivity : Activity() {
+    private lateinit var appPreferences: AppPreferences
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        appPreferences = AppPreferences(this)
+        handleIntent(intent)
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+        handleIntent(intent)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        overridePendingTransition(0, 0)
+    }
+
+    private fun handleIntent(intent: Intent) {
+        intent.data?.let {
+            if (appPreferences.copyOtpOnNfcTap) {
+                try {
+                    val otpSlotContent = parseOtpFromIntent()
+                    setPrimaryClip(otpSlotContent.content)
+
+                    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2) {
+                        showToast(
+                            when (otpSlotContent.type) {
+                                OtpType.Otp -> R.string.otp_success_set_otp_to_clipboard
+                                OtpType.Password -> R.string.otp_success_set_password_to_clipboard
+                            }, Toast.LENGTH_SHORT
+                        )
+                    }
+
+                } catch (illegalArgumentException: IllegalArgumentException) {
+                    Log.e(
+                        TAG,
+                        illegalArgumentException.message ?: "Failure when handling YubiKey OTP",
+                        illegalArgumentException.stackTraceToString()
+                    )
+                    showToast(R.string.otp_parse_failure, Toast.LENGTH_LONG)
+                } catch (_: UnsupportedOperationException) {
+                    showToast(R.string.otp_set_clip_failure, Toast.LENGTH_LONG)
+                }
+            }
+
+            if (appPreferences.openAppOnNfcTap) {
+                val mainAppIntent = Intent(this, MainActivity::class.java).apply {
+                    // Pass the NFC Tag to the main Activity.
+                    putExtra(NfcAdapter.EXTRA_TAG, intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG))
+                }
+                startActivity(mainAppIntent)
+            }
+
+            finishAndRemoveTask()
+        }
+    }
+
+    private fun showToast(value: ResourceId, length: Int) {
+        Toast.makeText(this, value, length).show()
+    }
+
+    private fun parseOtpFromIntent(): OtpSlotValue {
+        val parcelable = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
+        if (parcelable != null && parcelable.isNotEmpty()) {
+            val ndefPayloadBytes =
+                NdefUtils.getNdefPayloadBytes((parcelable[0] as NdefMessage).toByteArray())
+
+            return if (ndefPayloadBytes.all { it in 32..126 }) {
+                OtpSlotValue(OtpType.Otp, String(ndefPayloadBytes, StandardCharsets.US_ASCII))
+            } else {
+                val kbd: KeyboardLayout = KeyboardLayout.forName(appPreferences.clipKbdLayout)
+                OtpSlotValue(OtpType.Password, kbd.fromScanCodes(ndefPayloadBytes))
+            }
+        }
+        throw IllegalArgumentException("Failed to parse OTP from the intent")
+    }
+
+    private fun setPrimaryClip(otp: String) {
+        try {
+            val clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+            clipboardManager.setPrimaryClip(ClipData.newPlainText(otp, otp))
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to copy otp string to clipboard", e.stackTraceToString())
+            throw UnsupportedOperationException()
+        }
+    }
+
+    companion object {
+        const val TAG = "YubicoAuthenticatorOTPActivity"
+    }
+
+    enum class OtpType {
+        Otp, Password
+    }
+
+    data class OtpSlotValue(val type: OtpType, val content: String)
+}

android/app/src/main/kotlin/com/yubico/authenticator/logging/FlutterLog.kt

@@ -4,10 +4,10 @@ import io.flutter.plugin.common.BinaryMessenger
 import io.flutter.plugin.common.MethodChannel
 
 class FlutterLog(messenger: BinaryMessenger) {
-    private var _channel = MethodChannel(messenger, "android.log.redirect")
+    private var channel = MethodChannel(messenger, "android.log.redirect")
 
     init {
-        _channel.setMethodCallHandler { call, result ->
+        channel.setMethodCallHandler { call, result ->
 
             when (call.method) {
                 "log" -> {

android/app/src/main/kotlin/com/yubico/authenticator/logging/Log.kt

@@ -13,11 +13,11 @@ object Log {
         ERROR
     }
 
-    const val MAX_BUFFER_SIZE = 1000
-    private val _buffer = arrayListOf<String>()
+    private const val MAX_BUFFER_SIZE = 1000
+    private val buffer = arrayListOf<String>()
 
     fun getBuffer() : List<String> {
-        return _buffer
+        return buffer
     }
 
     private var level = if (BuildConfig.DEBUG) {
@@ -59,12 +59,12 @@ object Log {
             return
         }
 
-        if (_buffer.size > MAX_BUFFER_SIZE) {
-            _buffer.removeAt(0)
+        if (buffer.size > MAX_BUFFER_SIZE) {
+            buffer.removeAt(0)
         }
 
         val logMessage = "[$loggerName] ${level.name}: $message".also {
-            _buffer.add(it)
+            buffer.add(it)
         }
 
         when (level) {
@@ -76,8 +76,8 @@ object Log {
         }
 
         error?.let {
-            Log.e(TAG, "[$loggerName] ${level.name}: $error".also {
-                _buffer.add(it)
+            Log.e(TAG, "[$loggerName] ${level.name}(details): $error".also {
+                buffer.add(it)
             })
         }
     }

android/app/src/main/kotlin/com/yubico/authenticator/oath/Conversion.kt

@@ -1,7 +1,9 @@
 package com.yubico.authenticator.oath
 
+import com.yubico.authenticator.device.Version
 import com.yubico.yubikit.oath.Code
 import com.yubico.yubikit.oath.Credential
+import com.yubico.yubikit.oath.OathSession
 import com.yubico.yubikit.oath.OathType
 
 fun ByteArray.asString() = joinToString(
@@ -9,6 +11,18 @@ fun ByteArray.asString() = joinToString(
 ) { b -> "%02x".format(b) }
 
 // convert yubikit types to Model types
+fun OathSession.model(isRemembered: Boolean) = Model.Session(
+    deviceId,
+    Version(
+        version.major,
+        version.minor,
+        version.micro
+    ),
+    isAccessKeySet,
+    isRemembered,
+    isLocked
+)
+
 fun Credential.model(deviceId: String) = Model.Credential(
     deviceId = deviceId,
     id = id.asString(),

android/app/src/main/kotlin/com/yubico/authenticator/oath/Model.kt

@@ -8,10 +8,6 @@ import kotlinx.serialization.descriptors.SerialDescriptor
 import kotlinx.serialization.encoding.Decoder
 import kotlinx.serialization.encoding.Encoder
 
-fun Model.Credential.isInteractive(): Boolean {
-    return oathType == Model.OathType.HOTP || (oathType == Model.OathType.TOTP && touchRequired)
-}
-
 class Model {
 
     @Serializable
@@ -28,6 +24,7 @@ class Model {
         val isLocked: Boolean
     ) {
         @SerialName("keystore")
+        @Suppress("unused")
         val keystoreState: String = "unknown"
     }
 
@@ -63,7 +60,7 @@ class Model {
 
 
     @Serializable
-    class Code(
+    data class Code(
         val value: String? = null,
         @SerialName("valid_from")
         @Suppress("unused")
@@ -95,96 +92,4 @@ class Model {
         }
 
     }
-
-    private var _credentials = mutableMapOf<Credential, Code?>()
-
-    var session : Session? = null
-    val credentials: List<CredentialWithCode>
-        get() = _credentials.map {
-            CredentialWithCode(it.key, it.value)
-        }
-
-    // resets the model to initial values
-    // used when a usb key has been disconnected
-    fun reset() {
-        this._credentials.clear()
-        this.session = null
-    }
-
-    fun update(deviceId: String, credentials: Map<Credential, Code?>) {
-
-        // is the model already holding credentials for the deviceId
-        val sameDevice = this._credentials.keys.firstOrNull()?.deviceId == deviceId
-
-        if (!sameDevice) {
-            // device was changed, we use the new list
-            this._credentials.clear()
-            this._credentials.putAll(from = credentials)
-        } else {
-
-            // update codes for non interactive keys
-            for ((credential, code) in credentials) {
-                if (!credential.isInteractive() || !this._credentials.contains(credential)) {
-                    this._credentials[credential] = code
-                }
-            }
-            // remove obsolete credentials
-            this._credentials.filter { entry ->
-                // get only keys which are not present in the input map
-                !credentials.contains(entry.key)
-            }.forEach(action = {
-                this._credentials.remove(it.key)
-            })
-        }
-    }
-
-    fun add(deviceId: String, credential: Credential, code: Code?): CredentialWithCode? {
-        if (this.session?.deviceId != deviceId) {
-            return null
-        }
-
-        _credentials[credential] = code
-
-        return CredentialWithCode(credential, code)
-    }
-
-    fun rename(
-        deviceId: String,
-        oldCredential: Credential,
-        newCredential: Credential
-    ): Credential? {
-        if (this.session?.deviceId != deviceId) {
-            return null
-        }
-
-        if (oldCredential.deviceId != newCredential.deviceId) {
-            return null
-        }
-
-        if (!_credentials.contains(oldCredential)) {
-            return null
-        }
-
-        // preserve code
-        val code = _credentials[oldCredential]
-
-        _credentials.remove(oldCredential)
-        _credentials[newCredential] = code
-
-        return newCredential
-    }
-
-    fun updateCode(deviceId: String, credential: Credential, code: Code?): Code? {
-        if (this.session?.deviceId != deviceId) {
-            return null
-        }
-
-        if (!_credentials.contains(credential)) {
-            return null
-        }
-
-        _credentials[credential] = code
-
-        return code
-    }
 }

android/app/src/main/kotlin/com/yubico/authenticator/oath/OathManager.kt

@@ -1,368 +1,408 @@
 package com.yubico.authenticator.oath
 
+import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.Observer
 import com.yubico.authenticator.*
-import com.yubico.authenticator.api.Pigeon.*
-import com.yubico.authenticator.device.Version
 import com.yubico.authenticator.logging.Log
+import com.yubico.authenticator.management.model
 import com.yubico.authenticator.oath.keystore.ClearingMemProvider
 import com.yubico.authenticator.oath.keystore.KeyStoreProvider
 import com.yubico.authenticator.yubikit.getDeviceInfo
-import com.yubico.authenticator.yubikit.withSmartCardConnection
-import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
+import com.yubico.authenticator.yubikit.withConnection
 import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
+import com.yubico.yubikit.core.Transport
 import com.yubico.yubikit.core.YubiKeyDevice
+import com.yubico.yubikit.core.YubiKeyType
+import com.yubico.yubikit.core.application.ApplicationNotAvailableException
 import com.yubico.yubikit.core.smartcard.SmartCardConnection
+import com.yubico.yubikit.core.util.Result
 import com.yubico.yubikit.oath.*
+import com.yubico.yubikit.support.DeviceUtil
 import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
 import kotlinx.coroutines.*
 import kotlinx.serialization.encodeToString
-import kotlinx.serialization.json.Json
 import java.net.URI
 import java.util.concurrent.Executors
 import kotlin.coroutines.suspendCoroutine
 
+typealias OathAction = (Result<OathSession, Exception>) -> Unit
+
 class OathManager(
     private val lifecycleOwner: LifecycleOwner,
     messenger: BinaryMessenger,
-    appContext: AppContext,
     private val appViewModel: MainViewModel,
-    private val dialogManager: DialogManager
-) : OathApi {
-
-    private val _dispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
-    private val coroutineScope = CoroutineScope(SupervisorJob() + _dispatcher)
-
-    private val _fOathApi: FOathApi = FOathApi(messenger)
-    private val _fManagementApi: FManagementApi = FManagementApi(messenger)
-
-    private val _memoryKeyProvider = ClearingMemProvider()
-    private val _keyManager = KeyManager(KeyStoreProvider(), _memoryKeyProvider)
-    private var _previousNfcDeviceId = ""
-
-    private val _pendingYubiKeyAction = MutableLiveData<YubiKeyAction?>()
-    private val pendingYubiKeyAction: LiveData<YubiKeyAction?> = _pendingYubiKeyAction
-
-    private val _model = Model()
-
-    init {
-        OathApi.setup(messenger, this)
-
-        appContext.appContext.observe(lifecycleOwner) {
-            if (it == OperationContext.Oath) {
-                installObservers()
-            } else {
-                uninstallObservers()
-            }
-        }
-    }
-
+    private val oathViewModel: OathViewModel,
+    private val dialogManager: DialogManager,
+    private val appPreferences: AppPreferences,
+) : AppContextManager {
     companion object {
         const val TAG = "OathManager"
+        const val NFC_DATA_CLEANUP_DELAY = 30L * 1000; // 30s
     }
 
-    private val deviceObserver =
-        Observer<YubiKeyDevice?> { yubiKeyDevice ->
-            if (yubiKeyDevice != null) {
-                yubikeyAttached(yubiKeyDevice)
-            } else {
-                yubikeyDetached()
-            }
-        }
+    private val dispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
+    private val coroutineScope = CoroutineScope(SupervisorJob() + dispatcher)
 
-    private fun installObservers() {
-        Log.d(TAG, "Installed oath observers")
-        appViewModel.yubiKeyDevice.observe(lifecycleOwner, deviceObserver)
-    }
+    private val oathChannel = MethodChannel(messenger, "android.oath.methods")
 
-    private fun uninstallObservers() {
-        appViewModel.yubiKeyDevice.removeObserver(deviceObserver)
-        Log.d(TAG, "Uninstalled oath observers")
-    }
+    private val memoryKeyProvider = ClearingMemProvider()
+    private val keyManager = KeyManager(KeyStoreProvider(), memoryKeyProvider)
 
-    private suspend fun provideYubiKey(result: com.yubico.yubikit.core.util.Result<YubiKeyDevice, Exception>) =
-        pendingYubiKeyAction.value?.let {
-            _pendingYubiKeyAction.postValue(null)
-            it.action.invoke(result)
-        } ?: run {
-            Log.e(TAG, "The pending action is not valid anymore")
-            throw IllegalStateException("The pending action is not valid anymore")
-        }
+    private var pendingAction: OathAction? = null
+    private var refreshJob: Job? = null
 
-    private var _isUsbKey = false
-    private fun yubikeyAttached(device: YubiKeyDevice) {
-        Log.d(TAG, "Device connected")
+    // provides actions for lifecycle events
+    private val lifecycleObserver = object : DefaultLifecycleObserver {
 
-        _isUsbKey = device is UsbYubiKeyDevice
+        private var startTimeMs: Long = -1
 
-        val handler = CoroutineExceptionHandler { _, throwable ->
-            Log.e(TAG, "Exception caught: ${throwable.message}")
-        }
+        override fun onPause(owner: LifecycleOwner) {
+            startTimeMs = currentTimeMs
 
-        coroutineScope.launch(handler) {
-            sendDeviceInfo(device)
-            readOathData(device)
-            if (pendingYubiKeyAction.value != null) {
-                provideYubiKey(com.yubico.yubikit.core.util.Result.success(device))
-            } else {
-                sendOathInfo()
-                sendOathCodes()
-            }
-        }
-    }
-
-    private fun yubikeyDetached() {
-        if (_isUsbKey) {
-            Log.d(TAG, "Device disconnected")
-            // clear keys from memory
-            _memoryKeyProvider.clearAll()
-            _pendingYubiKeyAction.postValue(null)
-            _fManagementApi.updateDeviceInfo("") {}
-            _model.reset()
-        }
-    }
-
-    override fun reset(result: Result<Void>) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Reset YubiKey", true) {
-                    // note, it is ok to reset locked session
-                    it.reset()
-                    _keyManager.removeKey(it.deviceId)
-                    returnSuccess(result)
+            // cancel any pending actions
+            pendingAction?.let {
+                Log.d(TAG, "Cancelling pending action/closing nfc dialog.")
+                it.invoke(Result.failure(CancellationException()))
+                coroutineScope.launch {
+                    dialogManager.closeDialog()
+                }
+                pendingAction = null
+            }
+
+            super.onPause(owner)
+        }
+
+        override fun onResume(owner: LifecycleOwner) {
+            super.onResume(owner)
+            if (canInvoke) {
+                if (appViewModel.connectedYubiKey.value == null) {
+                    // no USB YubiKey is connected, reset known data on resume
+                    Log.d(TAG, "Removing NFC data after resume.")
+                    appViewModel.setDeviceInfo(null)
+                    oathViewModel.setSessionState(null)
+                }
+            }
+        }
+
+
+        private val currentTimeMs
+            get() = System.currentTimeMillis()
+
+        private val canInvoke: Boolean
+            get() = startTimeMs != -1L && currentTimeMs - startTimeMs > NFC_DATA_CLEANUP_DELAY
+    }
+
+    private val usbObserver = Observer<UsbYubiKeyDevice?> {
+        refreshJob?.cancel()
+        if (it == null) {
+            appViewModel.setDeviceInfo(null)
+            oathViewModel.setSessionState(null)
+        }
+    }
+
+    private val credentialObserver = Observer<List<Model.CredentialWithCode>?> { codes ->
+        refreshJob?.cancel()
+        if (codes != null && appViewModel.connectedYubiKey.value != null) {
+            val expirations = codes
+                .filter { it.credential.oathType == Model.OathType.TOTP && !it.credential.touchRequired }
+                .mapNotNull { it.code?.validTo }
+            if (expirations.isNotEmpty()) {
+                val earliest = expirations.min() * 1000
+                val now = System.currentTimeMillis()
+                refreshJob = coroutineScope.launch {
+                    if (earliest > now) {
+                        delay(earliest - now)
+                    }
+                    requestRefresh()
                 }
-            } catch (e: Throwable) {
-                returnError(result, e)
             }
         }
     }
 
-    override fun unlock(
-        password: String,
-        remember: Boolean,
-        result: Result<UnlockResponse>
-    ) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Unlocking", true) {
-                    val accessKey = it.deriveAccessKey(password.toCharArray())
-                    _keyManager.addKey(it.deviceId, accessKey, remember)
+    init {
+        appViewModel.connectedYubiKey.observe(lifecycleOwner, usbObserver)
+        oathViewModel.credentials.observe(lifecycleOwner, credentialObserver)
 
-                    val response = UnlockResponse().apply {
-                        isUnlocked = tryToUnlockOathSession(it)
-                        isRemembered = _keyManager.isRemembered(it.deviceId)
+        // OATH methods callable from Flutter:
+        oathChannel.setHandler(coroutineScope) { method, args ->
+            when (method) {
+                "reset" -> reset()
+                "unlock" -> unlock(
+                    args["password"] as String,
+                    args["remember"] as Boolean
+                )
+                "setPassword" -> setPassword(
+                    args["current"] as String?,
+                    args["password"] as String
+                )
+                "unsetPassword" -> unsetPassword(args["current"] as String)
+                "forgetPassword" -> forgetPassword()
+                "calculate" -> calculate(args["credentialId"] as String)
+                "addAccount" -> addAccount(
+                    args["uri"] as String,
+                    args["requireTouch"] as Boolean
+                )
+                "renameAccount" -> renameAccount(
+                    args["credentialId"] as String,
+                    args["name"] as String,
+                    args["issuer"] as String?
+                )
+                "deleteAccount" -> deleteAccount(args["credentialId"] as String)
+                else -> throw NotImplementedError()
+            }
+        }
+
+        lifecycleOwner.lifecycle.addObserver(lifecycleObserver)
+    }
+
+    override fun dispose() {
+        lifecycleOwner.lifecycle.removeObserver(lifecycleObserver)
+        appViewModel.connectedYubiKey.removeObserver(usbObserver)
+        oathViewModel.credentials.removeObserver(credentialObserver)
+        oathChannel.setMethodCallHandler(null)
+        coroutineScope.cancel()
+    }
+
+    override suspend fun processYubiKey(device: YubiKeyDevice) {
+        try {
+            device.withConnection<SmartCardConnection, Unit> { connection ->
+                val oath = OathSession(connection)
+                tryToUnlockOathSession(oath)
+
+                val previousId = oathViewModel.sessionState.value?.deviceId
+                if (oath.deviceId == previousId) {
+                    // Run any pending action
+                    pendingAction?.let { action ->
+                        action.invoke(Result.success(oath))
+                        pendingAction = null
                     }
-                    if (response.isUnlocked == true) {
-                        _model.update(it.deviceId, calculateOathCodes(it).model(it.deviceId))
-                        coroutineScope.launch {
-                            sendOathCodes()
+
+                    // Refresh codes
+                    if (!oath.isLocked) {
+                        try {
+                            oathViewModel.updateCredentials(
+                                calculateOathCodes(oath).model(oath.deviceId)
+                            )
+                        } catch (error: Exception) {
+                            Log.e(TAG, "Failed to refresh codes", error.toString())
                         }
                     }
-                    returnSuccess(result, response)
-                }
+                } else {
+                    // Awaiting an action for a different device? Fail it and stop processing.
+                    pendingAction?.let { action ->
+                        action.invoke(Result.failure(IllegalStateException("Wrong deviceId")))
+                        pendingAction = null
+                        return@withConnection
+                    }
 
-            } catch (cause: Throwable) {
-                returnError(result, cause)
+                    // Clear in-memory password for any previous device
+                    if (connection.transport == Transport.NFC && previousId != null) {
+                        memoryKeyProvider.removeKey(previousId)
+                    }
+
+                    // Update the OATH state
+                    oathViewModel.setSessionState(oath.model(keyManager.isRemembered(oath.deviceId)))
+                    if (!oath.isLocked) {
+                        oathViewModel.updateCredentials(
+                            calculateOathCodes(oath).model(oath.deviceId)
+                        )
+                    }
+
+                    // Update deviceInfo since the deviceId has changed
+                    if (oath.version.isLessThan(4, 0, 0) && connection.transport == Transport.NFC) {
+                        // NEO over NFC, need a new connection to select another applet
+                        device.requestConnection(SmartCardConnection::class.java) {
+                            try {
+                                val deviceInfo = DeviceUtil.readInfo(it.value, null)
+                                appViewModel.setDeviceInfo(
+                                    deviceInfo.model(
+                                        DeviceUtil.getName(deviceInfo, YubiKeyType.NEO),
+                                        true,
+                                        null
+                                    )
+                                )
+                            } catch (e: Exception) {
+                                Log.e(TAG, "Failed to read device info", e.toString())
+                            }
+                        }
+                    } else {
+                        // Not a NEO over NFC, reuse existing connection
+                        val pid = (device as? UsbYubiKeyDevice)?.pid
+                        val deviceInfo = DeviceUtil.readInfo(connection, pid)
+                        appViewModel.setDeviceInfo(
+                            deviceInfo.model(
+                                DeviceUtil.getName(deviceInfo, pid?.type),
+                                device.transport == Transport.NFC,
+                                pid?.value
+                            )
+                        )
+                    }
+                }
             }
+            Log.d(
+                TAG,
+                "Successfully read Oath session info (and credentials if unlocked) from connected key"
+            )
+        } catch (e: Exception) {
+            // OATH not enabled/supported, try to get DeviceInfo over other USB interfaces
+            Log.e(TAG, "Failed to connect to CCID", e.toString())
+            if (device.transport == Transport.USB || e is ApplicationNotAvailableException) {
+                val deviceInfoData = getDeviceInfo(device)
+                Log.d(TAG, "Sending device info: $deviceInfoData")
+                appViewModel.setDeviceInfo(deviceInfoData)
+            }
+
+            // Clear any cached OATH state
+            oathViewModel.setSessionState(null)
         }
     }
 
-    override fun setPassword(
+    private suspend fun reset(): String {
+        useOathSession("Reset YubiKey") {
+            // note, it is ok to reset locked session
+            it.reset()
+            keyManager.removeKey(it.deviceId)
+            oathViewModel.setSessionState(it.model(false))
+        }
+        return NULL
+    }
+
+    private suspend fun unlock(password: String, remember: Boolean): String =
+        useOathSession("Unlocking") {
+            val accessKey = it.deriveAccessKey(password.toCharArray())
+            keyManager.addKey(it.deviceId, accessKey, remember)
+
+            val unlocked = tryToUnlockOathSession(it)
+            val remembered = keyManager.isRemembered(it.deviceId)
+            if (unlocked) {
+                oathViewModel.setSessionState(it.model(remembered))
+                oathViewModel.updateCredentials(calculateOathCodes(it).model(it.deviceId))
+            }
+
+            jsonSerializer.encodeToString(mapOf("unlocked" to unlocked, "remembered" to remembered))
+        }
+
+    private suspend fun setPassword(
         currentPassword: String?,
         newPassword: String,
-        result: Result<Void>
-    ) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Set password", true) { session ->
-                    if (session.isAccessKeySet) {
-                        if (currentPassword == null) {
-                            throw Exception("Must provide current password to be able to change it")
-                        }
-                        // test current password sent by the user
-                        if (!session.unlock(currentPassword.toCharArray())) {
-                            throw Exception("Provided current password is invalid")
-                        }
-                    }
-                    val accessKey = session.deriveAccessKey(newPassword.toCharArray())
-                    session.setAccessKey(accessKey)
-                    _keyManager.addKey(session.deviceId, accessKey, false)
-                    Log.d(TAG, "Successfully set password")
-                    returnSuccess(result)
+    ): String =
+        useOathSession("Set password") { session ->
+            if (session.isAccessKeySet) {
+                if (currentPassword == null) {
+                    throw Exception("Must provide current password to be able to change it")
                 }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
-            }
-        }
-    }
-
-    override fun unsetPassword(currentPassword: String, result: Result<Void>) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Unset password", true) { session ->
-                    if (session.isAccessKeySet) {
-                        // test current password sent by the user
-                        if (session.unlock(currentPassword.toCharArray())) {
-                            session.deleteAccessKey()
-                            _keyManager.removeKey(session.deviceId)
-                            Log.d(TAG, "Successfully unset password")
-                            returnSuccess(result)
-                            return@useOathSession
-                        }
-                    }
-                    returnError(result, Exception("Unset password failed"))
+                // test current password sent by the user
+                if (!session.unlock(currentPassword.toCharArray())) {
+                    throw Exception("Provided current password is invalid")
                 }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
             }
+            val accessKey = session.deriveAccessKey(newPassword.toCharArray())
+            session.setAccessKey(accessKey)
+            keyManager.addKey(session.deviceId, accessKey, false)
+            oathViewModel.setSessionState(session.model(false))
+            Log.d(TAG, "Successfully set password")
+            NULL
         }
-    }
 
-    override fun forgetPassword(result: Result<Void>) {
-        _keyManager.clearAll()
+    private suspend fun unsetPassword(currentPassword: String): String =
+        useOathSession("Unset password") { session ->
+            if (session.isAccessKeySet) {
+                // test current password sent by the user
+                if (session.unlock(currentPassword.toCharArray())) {
+                    session.deleteAccessKey()
+                    keyManager.removeKey(session.deviceId)
+                    oathViewModel.setSessionState(session.model(false))
+                    Log.d(TAG, "Successfully unset password")
+                    return@useOathSession NULL
+                }
+            }
+            throw Exception("Unset password failed")
+        }
+
+    private suspend fun forgetPassword(): String {
+        keyManager.clearAll()
         Log.d(TAG, "Cleared all keys.")
-        returnSuccess(result)
+        oathViewModel.sessionState.value?.let {
+            oathViewModel.setSessionState(
+                it.copy(
+                    isLocked = it.isAccessKeySet,
+                    isRemembered = false
+                )
+            )
+        }
+        return NULL
     }
 
-    override fun addAccount(
+    private suspend fun addAccount(
         uri: String,
         requireTouch: Boolean,
-        result: Result<String>
-    ) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Add account", true) { session ->
-                    withUnlockedSession(session) {
-                        val credentialData: CredentialData =
-                            CredentialData.parseUri(URI.create(uri))
+    ): String =
+        useOathSession("Add account") { session ->
+            val credentialData: CredentialData =
+                CredentialData.parseUri(URI.create(uri))
 
-                        val credential = session.putCredential(credentialData, requireTouch)
+            val credential = session.putCredential(credentialData, requireTouch)
 
-                        val code =
-                            if (credentialData.oathType == OathType.TOTP && !requireTouch) {
-                                // recalculate the code
-                                calculateCode(session, credential)
-                            } else null
+            val code =
+                if (credentialData.oathType == OathType.TOTP && !requireTouch) {
+                    // recalculate the code
+                    calculateCode(session, credential)
+                } else null
 
-                        val addedCred = _model.add(
-                            session.deviceId,
-                            credential.model(session.deviceId),
-                            code?.model()
-                        )
+            val addedCred = oathViewModel.addCredential(
+                credential.model(session.deviceId),
+                code?.model()
+            )
 
-                        if (addedCred != null) {
-                            val jsonResult = jsonSerializer.encodeToString(addedCred)
-                            returnSuccess(result, jsonResult)
-                        } else {
-                            // TODO - figure out better error handling here
-                            returnError(result, java.lang.IllegalStateException())
-                        }
-                    }
-                }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
-            }
+            jsonSerializer.encodeToString(addedCred)
         }
+
+    private suspend fun renameAccount(uri: String, name: String, issuer: String?): String =
+        useOathSession("Rename") { session ->
+            val credential = getOathCredential(session, uri)
+            val renamedCredential =
+                session.renameCredential(credential, name, issuer).model(session.deviceId)
+            oathViewModel.renameCredential(
+                credential.model(session.deviceId),
+                renamedCredential
+            )
+
+            jsonSerializer.encodeToString(renamedCredential)
+        }
+
+    private suspend fun deleteAccount(credentialId: String): String =
+        useOathSession("Delete account") { session ->
+            val credential = getOathCredential(session, credentialId)
+            session.deleteCredential(credential)
+            oathViewModel.removeCredential(credential.model(session.deviceId))
+            NULL
+        }
+
+    private suspend fun requestRefresh() {
+        appViewModel.connectedYubiKey.value?.let { usbYubiKeyDevice ->
+            useOathSessionUsb(usbYubiKeyDevice) { session ->
+                oathViewModel.updateCredentials(
+                    calculateOathCodes(session).model(session.deviceId)
+                )
+            }
+        } ?: throw IllegalStateException("Cannot refresh for nfc key")
     }
 
-    override fun renameAccount(uri: String, name: String, issuer: String?, result: Result<String>) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Rename", true) { session ->
-                    withUnlockedSession(session) {
-                        val credential = getOathCredential(session, uri)
+    private suspend fun calculate(credentialId: String): String =
+        useOathSession("Calculate") { session ->
+            val credential = getOathCredential(session, credentialId)
 
-                        val renamedCredential = _model.rename(
-                            it.deviceId,
-                            credential.model(it.deviceId),
-                            session.renameCredential(credential, name, issuer).model(it.deviceId)
-                        )
+            val code = calculateCode(session, credential).model()
+            oathViewModel.updateCode(
+                credential.model(session.deviceId),
+                code
+            )
+            Log.d(TAG, "Code calculated $code")
 
-                        if (renamedCredential != null) {
-                            val jsonResult =
-                                jsonSerializer.encodeToString(renamedCredential)
-
-                            returnSuccess(result, jsonResult)
-                        } else {
-                            // TODO - figure out better error handling here
-                            returnError(result, java.lang.IllegalStateException())
-                        }
-                    }
-                }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
-            }
+            jsonSerializer.encodeToString(code)
         }
-    }
-
-    override fun deleteAccount(uri: String, result: Result<Void>) {
-        coroutineScope.launch {
-            useOathSession("Delete account", true) { session ->
-                withUnlockedSession(session) {
-                    val credential = getOathCredential(session, uri)
-                    session.deleteCredential(credential)
-                    returnSuccess(result)
-                }
-            }
-        }
-    }
-
-    override fun refreshCodes(result: Result<String>) {
-        coroutineScope.launch {
-            try {
-                if (!_isUsbKey) {
-                    throw Exception("Cannot refresh for nfc key")
-                }
-
-                useOathSession("Refresh codes", false) {
-                    withUnlockedSession(it) { session ->
-
-                        _model.update(
-                            session.deviceId,
-                            calculateOathCodes(session).model(session.deviceId)
-                        )
-                        val resultJson = jsonSerializer.encodeToString(_model.credentials)
-                        returnSuccess(result, resultJson)
-                    }
-                }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
-            }
-        }
-    }
-
-    override fun calculate(uri: String, result: Result<String>) {
-        coroutineScope.launch {
-            try {
-                useOathSession("Calculate", true) {
-                    withUnlockedSession(it) { session ->
-
-                        val credential = getOathCredential(session, uri)
-
-                        val code = _model.updateCode(
-                            session.deviceId,
-                            credential.model(session.deviceId),
-                            calculateCode(session, credential).model()
-                        )
-
-                        if (code != null) {
-                            val resultJson = jsonSerializer.encodeToString(code)
-
-                            returnSuccess(result, resultJson)
-                        } else {
-                            // TODO - figure out better error handling here
-                            returnError(result, java.lang.IllegalStateException())
-                        }
-                    }
-                }
-            } catch (cause: Throwable) {
-                returnError(result, cause)
-            }
-        }
-    }
 
     /**
      * Returns Steam code or standard TOTP code based on the credential.
@@ -384,85 +424,11 @@ class OathManager(
         }
     }
 
-    private suspend fun sendDeviceInfo(device: YubiKeyDevice) {
-        val deviceInfoData = getDeviceInfo(device)
-        withContext(Dispatchers.Main) {
-            Log.d(TAG, "Sending device info: $deviceInfoData")
-            _fManagementApi.updateDeviceInfo(Json.encodeToString(deviceInfoData)) {
-                Log.d(TAG, "Device info sent successfully")
-            }
-        }
-    }
-
-
-    private suspend fun readOathData(device: YubiKeyDevice) {
-        withSmartCardConnection(device) { smartCardConnection ->
-            val oathSession = OathSession(smartCardConnection)
-
-            val deviceId = oathSession.deviceId
-
-            _previousNfcDeviceId = if (device is NfcYubiKeyDevice) {
-                if (deviceId != _previousNfcDeviceId) {
-                    // devices are different, clear access key for previous device
-                    _memoryKeyProvider.removeKey(_previousNfcDeviceId)
-                }
-                deviceId
-            } else {
-                ""
-            }
-
-            // calling unlock session will remove invalid access keys
-            val isUnlocked = tryToUnlockOathSession(oathSession)
-            val isRemembered = _keyManager.isRemembered(deviceId)
-
-            _model.session = Model.Session(
-                deviceId,
-                Version(
-                    oathSession.version.major,
-                    oathSession.version.minor,
-                    oathSession.version.micro
-                ),
-                oathSession.isAccessKeySet,
-                isRemembered,
-                oathSession.isLocked
-            )
-
-            if (isUnlocked) {
-                _model.update(
-                    deviceId,
-                    calculateOathCodes(oathSession).model(deviceId)
-                )
-            }
-
-            Log.d(TAG, "Successfully read Oath session info (and credentials if unlocked) from connected key")
-        }
-    }
-
-    private suspend fun sendOathInfo() {
-        val oathSessionData = jsonSerializer.encodeToString(_model.session)
-        withContext(Dispatchers.Main) {
-            Log.d(TAG, "Sending OathSessionData")
-            _fOathApi.updateSession(oathSessionData) {
-                Log.d(TAG, "OathSessionData sent successfully")
-            }
-        }
-    }
-
-    private suspend fun sendOathCodes() {
-        val sendOathCodes = jsonSerializer.encodeToString(_model.credentials)
-        withContext(Dispatchers.Main) {
-            Log.d(TAG, "Sending OathCredentials")
-            _fOathApi.updateOathCredentials(sendOathCodes) {
-                Log.d(TAG, "OathCredentials sent successfully")
-            }
-        }
-    }
-
     /**
      * Tries to unlocks [OathSession] with [AccessKey] stored in [KeyManager]. On failure clears
      * relevant access keys from [KeyManager]
      *
-     * @return true if we the session is not locked or it was successfully unlocked, false otherwise
+     * @return true if the session is not locked or it was successfully unlocked, false otherwise
      */
     private fun tryToUnlockOathSession(session: OathSession): Boolean {
         if (!session.isLocked) {
@@ -470,7 +436,7 @@ class OathManager(
         }
 
         val deviceId = session.deviceId
-        val accessKey = _keyManager.getKey(deviceId)
+        val accessKey = keyManager.getKey(deviceId)
             ?: return false // we have no access key to unlock the session
 
         val unlockSucceed = session.unlock(accessKey)
@@ -479,20 +445,25 @@ class OathManager(
             return true
         }
 
-        _keyManager.removeKey(deviceId) // remove invalid access keys from [KeyManager]
+        keyManager.removeKey(deviceId) // remove invalid access keys from [KeyManager]
         return false // the unlock did not work, session is locked
     }
 
     private fun calculateOathCodes(session: OathSession): Map<Credential, Code> {
+        val isUsbKey = appViewModel.connectedYubiKey.value != null
         var timestamp = System.currentTimeMillis()
-        if (!_isUsbKey) {
+        if (!isUsbKey) {
             // NFC, need to pad timer to avoid immediate expiration
             timestamp += 10000
         }
+        val bypassTouch = appPreferences.bypassTouchOnNfcTap && !isUsbKey
         return session.calculateCodes(timestamp).map { (credential, code) ->
             Pair(
-                credential, if (credential.isSteamCredential() && !credential.isTouchRequired) {
+                credential,
+                if (credential.isSteamCredential() && (!credential.isTouchRequired || bypassTouch)) {
                     session.calculateSteamCode(credential, timestamp)
+                } else if (credential.isTouchRequired && bypassTouch) {
+                    session.calculateCode(credential, timestamp)
                 } else {
                     code
                 }
@@ -500,83 +471,69 @@ class OathManager(
         }.toMap()
     }
 
-    private fun <T> withUnlockedSession(session: OathSession, block: (OathSession) -> T): T {
-        if (!tryToUnlockOathSession(session)) {
-            throw Exception("Session is locked")
-        }
-        return block(session)
-    }
-
     private suspend fun <T> useOathSession(
         title: String,
-        queryUserToTap: Boolean,
         action: (OathSession) -> T
-    ) = suspendCoroutine<T> { outer ->
-        if (queryUserToTap && !_isUsbKey) {
-            dialogManager.showDialog(title) {
-                coroutineScope.launch(Dispatchers.Main) {
-                    Log.d(TAG, "Cancelled Dialog $title")
-                    provideYubiKey(com.yubico.yubikit.core.util.Result.failure(Exception("User canceled")))
-                }
-            }
-        }
+    ): T {
+        return appViewModel.connectedYubiKey.value?.let {
+            useOathSessionUsb(it, action)
+        } ?: useOathSessionNfc(title, action)
+    }
 
-        if (_isUsbKey) {
-            appViewModel.yubiKeyDevice.value?.let { yubiKey ->
-                Log.d(TAG, "Executing action on usb key: $title")
-                yubiKey.requestConnection(SmartCardConnection::class.java) {
-                    action.invoke(OathSession(it.value))
+    private suspend fun <T> useOathSessionUsb(
+        device: UsbYubiKeyDevice,
+        block: (OathSession) -> T
+    ): T = device.withConnection<SmartCardConnection, T> {
+        val oath = OathSession(it)
+        tryToUnlockOathSession(oath)
+        block(oath)
+    }
+
+    private suspend fun <T> useOathSessionNfc(
+        title: String,
+        block: (OathSession) -> T
+    ): T {
+        try {
+            val result = suspendCoroutine { outer ->
+                pendingAction = {
+                    outer.resumeWith(runCatching {
+                        block.invoke(it.value)
+                    })
+                }
+                dialogManager.showDialog(Icon.NFC, "Tap your key", title) {
+                    Log.d(TAG, "Cancelled Dialog $title")
+                    pendingAction?.invoke(Result.failure(CancellationException()))
+                    pendingAction = null
                 }
-            } ?: run {
-                Log.e(TAG, "USB Key not found for action: $title")
-                throw IllegalStateException("USB Key not found for action: $title")
             }
-        } else {
-            _pendingYubiKeyAction.postValue(YubiKeyAction(title) { yubiKey ->
-                outer.resumeWith(runCatching {
-                    suspendCoroutine { inner ->
-                        yubiKey.value.requestConnection(SmartCardConnection::class.java) {
-                            inner.resumeWith(runCatching {
-                                action.invoke(OathSession(it.value))
-                            })
-                        }
-                    }
-                })
-            })
+            dialogManager.updateDialogState(
+                icon = Icon.SUCCESS,
+                title = "Success"
+            )
+            // TODO: This delays the closing of the dialog, but also the return value
+            delay(500)
+            return result
+        } catch (cancelled: CancellationException) {
+            throw cancelled
+        } catch (error: Throwable) {
+            dialogManager.updateDialogState(
+                icon = Icon.ERROR,
+                title = "Failure",
+                description = "Action failed - try again"
+            )
+            // TODO: This delays the closing of the dialog, but also the return value
+            delay(1500)
+            throw error
+        } finally {
+            dialogManager.closeDialog()
         }
     }
 
     private fun getOathCredential(oathSession: OathSession, credentialId: String) =
-        oathSession.credentials.firstOrNull { credential ->
+        // we need to use oathSession.calculateCodes() to get proper Credential.touchRequired value
+        oathSession.calculateCodes().map { e -> e.key }.firstOrNull { credential ->
             (credential != null) && credential.id.asString() == credentialId
-        } ?: throw Exception("Failed to find account to delete")
+        } ?: throw Exception("Failed to find account")
 
 
-    /// for nfc connection waits for the dialog to be closed and then returns success data
-    /// for usb connection returns success data directly
-    private fun <T> returnSuccess(result: Result<T>, data: T? = null) {
-        coroutineScope.launch(Dispatchers.Main) {
-            if (!_isUsbKey) {
-                dialogManager.closeDialog {
-                    result.success(data)
-                }
-            } else {
-                result.success(data)
-            }
-        }
-    }
-
-    /// for nfc connection waits for the dialog to be closed and then returns error
-    /// for usb connection returns error directly
-    private fun <T> returnError(result: Result<T>, error: Throwable) {
-        coroutineScope.launch(Dispatchers.Main) {
-            if (!_isUsbKey) {
-                dialogManager.closeDialog {
-                    result.error(error)
-                }
-            } else {
-                result.error(error)
-            }
-        }
-    }
 }

android/app/src/main/kotlin/com/yubico/authenticator/oath/OathViewModel.kt

@@ -0,0 +1,66 @@
+package com.yubico.authenticator.oath
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class OathViewModel: ViewModel() {
+    private val _sessionState = MutableLiveData<Model.Session?>()
+    val sessionState: LiveData<Model.Session?> = _sessionState
+
+    fun setSessionState(sessionState: Model.Session?) {
+        val oldDeviceId = _sessionState.value?.deviceId
+        _sessionState.postValue(sessionState)
+        if(oldDeviceId != sessionState?.deviceId) {
+            _credentials.postValue(null)
+        }
+    }
+
+    private val _credentials = MutableLiveData<List<Model.CredentialWithCode>?>()
+    val credentials: LiveData<List<Model.CredentialWithCode>?> = _credentials
+
+    fun updateCredentials(credentials: Map<Model.Credential, Model.Code?>): List<Model.CredentialWithCode> {
+        val existing = _credentials.value?.associate { it.credential to it.code } ?: mapOf()
+
+        val updated = credentials.map {
+            Model.CredentialWithCode(it.key, it.value ?: existing[it.key])
+        }
+
+        _credentials.postValue(updated)
+
+        return updated
+    }
+
+    fun addCredential(credential: Model.Credential, code: Model.Code?): Model.CredentialWithCode {
+        if(credential.deviceId != _sessionState.value?.deviceId) {
+            throw IllegalArgumentException("Cannot add credential for different deviceId")
+        }
+        return Model.CredentialWithCode(credential, code).also {
+            _credentials.postValue(_credentials.value?.plus(it))
+        }
+    }
+
+    fun renameCredential(
+        oldCredential: Model.Credential,
+        newCredential: Model.Credential
+    ) {
+        val existing = _credentials.value!!
+        val entry = existing.find { it.credential == oldCredential }!!
+        if(entry.credential.deviceId != newCredential.deviceId) {
+            throw IllegalArgumentException("Cannot rename credential for different deviceId")
+        }
+        _credentials.postValue(existing.minus(entry).plus(Model.CredentialWithCode(newCredential, entry.code)))
+    }
+
+    fun removeCredential(credential: Model.Credential) {
+        val existing = _credentials.value!!
+        val entry = existing.find { it.credential == credential }!!
+        _credentials.postValue(existing.minus(entry))
+    }
+
+    fun updateCode(credential: Model.Credential, code: Model.Code?) {
+        val existing = _credentials.value!!
+        val entry = existing.find { it.credential == credential }!!
+        _credentials.postValue(existing.minus(entry).plus(Model.CredentialWithCode(credential, code)))
+    }
+}

android/app/src/main/kotlin/com/yubico/authenticator/oath/keystore/KeyStoreProvider.kt

@@ -14,7 +14,7 @@ class KeyStoreProvider : KeyProvider {
         keystore.load(null)
     }
 
-    override fun hasKey(deviceId: String): Boolean = keystore.containsAlias(deviceId)
+    override fun hasKey(deviceId: String): Boolean = keystore.containsAlias(getAlias(deviceId))
 
     override fun getKey(deviceId: String): AccessKey? =
         if (hasKey(deviceId)) {
@@ -25,7 +25,7 @@ class KeyStoreProvider : KeyProvider {
 
     override fun putKey(deviceId: String, secret: ByteArray) {
         keystore.setEntry(
-            deviceId,
+            getAlias(deviceId),
             KeyStore.SecretKeyEntry(
                 SecretKeySpec(secret, KeyProperties.KEY_ALGORITHM_HMAC_SHA1)
             ),
@@ -35,7 +35,7 @@ class KeyStoreProvider : KeyProvider {
 
 
     override fun removeKey(deviceId: String) {
-        keystore.deleteEntry(deviceId)
+        keystore.deleteEntry(getAlias(deviceId))
     }
 
     override fun clearAll() {
@@ -45,9 +45,13 @@ class KeyStoreProvider : KeyProvider {
     private inner class KeyStoreStoredSigner(val deviceId: String) :
         AccessKey {
         val mac: Mac = Mac.getInstance(KeyProperties.KEY_ALGORITHM_HMAC_SHA1).apply {
-            init(keystore.getKey(deviceId, null))
+            init(keystore.getKey(getAlias(deviceId), null))
         }
 
         override fun calculateResponse(challenge: ByteArray): ByteArray = mac.doFinal(challenge)
     }
+
+    // return key alias used in legacy app
+    private fun getAlias(deviceId: String) = "$deviceId,0"
+
 }

android/app/src/main/kotlin/com/yubico/authenticator/yubiclip/scancode/DECHKeyboardLayout.java

@@ -0,0 +1,141 @@
+package com.yubico.authenticator.yubiclip.scancode;
+
+/**
+ * Created by mjenny on 7/12/15.
+ */
+public class DECHKeyboardLayout extends KeyboardLayout {
+        private static final String[] usb2key1 = new String[]{
+                "",
+                "",
+                "",
+                "",
+                "a",
+                "b",
+                "c",
+                "d",
+                "e",
+                "f",
+                "g", /* 0xa */
+                "h",
+                "i",
+                "j",
+                "k",
+                "l",
+                "m",
+                "n",
+                "o",
+                "p",
+                "q", /* 0x14 */
+                "r",
+                "s",
+                "t",
+                "u",
+                "v",
+                "w",
+                "x",
+                "z",
+                "y",
+                "1", /* 0x1e */
+                "2",
+                "3",
+                "4",
+                "5",
+                "6",
+                "7",
+                "8",
+                "9",
+                "0",
+                "\n", /* 0x28 */
+                "",
+                "",
+                "\t",
+                " ",
+                "'",
+                "^",
+                "ü",
+                "¨",
+                "",
+                "$",
+                "ö",
+                "ä",
+                "§",
+                ",",
+                ".",
+                "-", /* 0x38 */
+        };
+        private static final String[] usb2key2 = new String[]{
+                "",
+                "",
+                "",
+                "",
+                "A",
+                "B",
+                "C",
+                "D",
+                "E",
+                "F",
+                "G", /* 0x8a */
+                "H",
+                "I",
+                "J",
+                "K",
+                "L",
+                "M",
+                "N",
+                "O",
+                "P",
+                "Q", /* 0x94 */
+                "R",
+                "S",
+                "T",
+                "U",
+                "V",
+                "W",
+                "X",
+                "Z",
+                "Y",
+                "+",
+                "\"",
+                "*",
+                "ç",
+                "%",
+                "&",
+                "/",
+                "(",
+                ")",
+                "=",
+                "",
+                "",
+                "",
+                "",
+                "",
+                "?",
+                "`",
+                "è",
+                "!",
+                "",
+                "£",
+                "Ö",
+                "Ä",
+                "°",
+                ";",
+                ":",
+                "_",
+        };
+
+        @Override
+        protected String fromScanCode(int code) {
+                if (code < SHIFT) {
+                        if (code < usb2key1.length) {
+                                return usb2key1[code];
+                        }
+                } else {
+                        code = code ^ SHIFT;
+                        if (code < usb2key2.length) {
+                                return usb2key2[code];
+                        }
+                }
+
+                return "";
+        }
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubiclip/scancode/DEKeyboardLayout.java

@@ -0,0 +1,141 @@
+package com.yubico.authenticator.yubiclip.scancode;
+
+/**
+ * Created by kemiren on 6/18/14.
+ */
+public class DEKeyboardLayout extends KeyboardLayout {
+    private static final String[] usb2key1 = new String[]{
+            "",
+            "",
+            "",
+            "",
+            "a",
+            "b",
+            "c",
+            "d",
+            "e",
+            "f",
+            "g", /* 0xa */
+            "h",
+            "i",
+            "j",
+            "k",
+            "l",
+            "m",
+            "n",
+            "o",
+            "p",
+            "q", /* 0x14 */
+            "r",
+            "s",
+            "t",
+            "u",
+            "v",
+            "w",
+            "x",
+            "z",
+            "y",
+            "1", /* 0x1e */
+            "2",
+            "3",
+            "4",
+            "5",
+            "6",
+            "7",
+            "8",
+            "9",
+            "0",
+            "\n", /* 0x28 */
+            "",
+            "",
+            "\t",
+            " ",
+            "ß",
+            "´",
+            "ü",
+            "+",
+            "",
+            "#",
+            "ö",
+            "'",
+            "^",
+            ",",
+            ".",
+            "-", /* 0x38 */
+    };
+    private static final String[] usb2key2 = new String[]{
+            "",
+            "",
+            "",
+            "",
+            "A",
+            "B",
+            "C",
+            "D",
+            "E",
+            "F",
+            "G", /* 0x8a */
+            "H",
+            "I",
+            "J",
+            "K",
+            "L",
+            "M",
+            "N",
+            "O",
+            "P",
+            "Q", /* 0x94 */
+            "R",
+            "S",
+            "T",
+            "U",
+            "V",
+            "W",
+            "X",
+            "Z",
+            "Y",
+            "!",
+            "\"",
+            "§",
+            "$",
+            "%",
+            "&",
+            "/",
+            "(",
+            ")",
+            "=",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "?",
+            "`",
+            "Ü",
+            "*",
+            "",
+            ">",
+            "Ö",
+            "Ä",
+            "'",
+            ";",
+            ":",
+            "_",
+    };
+
+    @Override
+    protected String fromScanCode(int code) {
+        if (code < SHIFT) {
+            if (code < usb2key1.length) {
+                return usb2key1[code];
+            }
+        } else {
+            code = code ^ SHIFT;
+            if (code < usb2key2.length) {
+                return usb2key2[code];
+            }
+        }
+
+        return "";
+    }
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubiclip/scancode/KeyboardLayout.java

@@ -0,0 +1,40 @@
+package com.yubico.authenticator.yubiclip.scancode;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+
+/**
+ * Created by dain on 2/17/14.
+ */
+public abstract class KeyboardLayout {
+    private static final Map<String, KeyboardLayout> layouts = new HashMap<String, KeyboardLayout>();
+
+    static {
+        layouts.put("US", new USKeyboardLayout());
+        layouts.put("DE", new DEKeyboardLayout());
+        layouts.put("DE-CH", new DECHKeyboardLayout());
+    }
+
+    public static KeyboardLayout forName(String name) {
+        return layouts.get(name.toUpperCase());
+    }
+
+    public static Set<String> availableLayouts() {
+        return new TreeSet<>(layouts.keySet());
+    }
+
+    protected static final int SHIFT = 0x80;
+
+    protected abstract String fromScanCode(int code);
+
+    public final String fromScanCodes(byte[] bytes) {
+        StringBuilder buf = new StringBuilder();
+        for (byte b : bytes) {
+            buf.append(fromScanCode(b & 0xff));
+        }
+
+        return buf.toString();
+    }
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubiclip/scancode/USKeyboardLayout.java

@@ -0,0 +1,141 @@
+package com.yubico.authenticator.yubiclip.scancode;
+
+/**
+ * Created by dain on 2/17/14.
+ */
+public class USKeyboardLayout extends KeyboardLayout {
+    private static final String[] usb2key1 = new String[]{
+            "",
+            "",
+            "",
+            "",
+            "a",
+            "b",
+            "c",
+            "d",
+            "e",
+            "f",
+            "g", /* 0xa */
+            "h",
+            "i",
+            "j",
+            "k",
+            "l",
+            "m",
+            "n",
+            "o",
+            "p",
+            "q", /* 0x14 */
+            "r",
+            "s",
+            "t",
+            "u",
+            "v",
+            "w",
+            "x",
+            "y",
+            "z",
+            "1", /* 0x1e */
+            "2",
+            "3",
+            "4",
+            "5",
+            "6",
+            "7",
+            "8",
+            "9",
+            "0",
+            "\n", /* 0x28 */
+            "",
+            "",
+            "\t",
+            " ",
+            "-",
+            "=",
+            "[",
+            "]",
+            "",
+            "\\",
+            ";",
+            "'",
+            "`",
+            ",",
+            ".",
+            "/", /* 0x38 */
+    };
+    private static final String[] usb2key2 = new String[]{
+            "",
+            "",
+            "",
+            "",
+            "A",
+            "B",
+            "C",
+            "D",
+            "E",
+            "F",
+            "G", /* 0x8a */
+            "H",
+            "I",
+            "J",
+            "K",
+            "L",
+            "M",
+            "N",
+            "O",
+            "P",
+            "Q", /* 0x94 */
+            "R",
+            "S",
+            "T",
+            "U",
+            "V",
+            "W",
+            "X",
+            "Y",
+            "Z",
+            "!",
+            "@",
+            "#",
+            "$",
+            "%",
+            "^",
+            "&",
+            "*",
+            "(",
+            ")",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "_",
+            "+",
+            "{",
+            "}",
+            "",
+            "|",
+            ":",
+            "\"",
+            "~",
+            "<",
+            ">",
+            "?",
+    };
+
+    @Override
+    protected String fromScanCode(int code) {
+        if (code < SHIFT) {
+            if (code < usb2key1.length) {
+                return usb2key1[code];
+            }
+        } else {
+            code = code ^ SHIFT;
+            if (code < usb2key2.length) {
+                return usb2key2[code];
+            }
+        }
+
+        return "";
+    }
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubikit/ConnectionHelper.kt

@@ -1,56 +1,15 @@
 package com.yubico.authenticator.yubikit
 
-import com.yubico.authenticator.device.Info
-import com.yubico.authenticator.logging.Log
-import com.yubico.authenticator.management.model
-import com.yubico.authenticator.oath.OathManager
-import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
-import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
+import com.yubico.yubikit.core.YubiKeyConnection
 import com.yubico.yubikit.core.YubiKeyDevice
-import com.yubico.yubikit.core.fido.FidoConnection
-import com.yubico.yubikit.core.otp.OtpConnection
-import com.yubico.yubikit.core.smartcard.SmartCardConnection
-import com.yubico.yubikit.support.DeviceUtil
-import kotlin.coroutines.resume
-import kotlin.coroutines.resumeWithException
 import kotlin.coroutines.suspendCoroutine
 
-
-suspend fun <T> withSmartCardConnection(
-    device: YubiKeyDevice,
-    block: (SmartCardConnection) -> T
-) =
-    suspendCoroutine<T> { continuation ->
-        device.requestConnection(SmartCardConnection::class.java) {
-            if (it.isError) {
-                continuation.resumeWithException(IllegalStateException("Failed to get SmartCardConnection"))
-            } else {
-                continuation.resume(block(it.value))
-            }
-        }
-    }
-
-suspend fun <T> withOTPConnection(device: YubiKeyDevice, block: (OtpConnection) -> T) =
-    suspendCoroutine<T> { continuation ->
-        device.requestConnection(OtpConnection::class.java) {
-            if (it.isError) {
-                continuation.resumeWithException(IllegalStateException("Failed to get OtpConnection"))
-            } else {
-                continuation.resume(block(it.value))
-            }
-        }
-    }
-
-suspend fun <T> withFidoConnection(
-    device: YubiKeyDevice,
-    block: (FidoConnection) -> T
-) =
-    suspendCoroutine<T> { continuation ->
-        device.requestConnection(FidoConnection::class.java) {
-            if (it.isError) {
-                continuation.resumeWithException(IllegalStateException("Failed to get FidoConnection"))
-            } else {
-                continuation.resume(block(it.value))
-            }
-        }
+suspend inline fun <reified C : YubiKeyConnection, T> YubiKeyDevice.withConnection(
+    crossinline block: (C) -> T
+): T = suspendCoroutine { continuation ->
+    requestConnection(C::class.java) {
+        continuation.resumeWith(runCatching {
+            block(it.value)
+        })
     }
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubikit/DeviceInfoHelper.kt

@@ -7,37 +7,31 @@ import com.yubico.authenticator.oath.OathManager
 import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
 import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
 import com.yubico.yubikit.core.YubiKeyDevice
+import com.yubico.yubikit.core.fido.FidoConnection
+import com.yubico.yubikit.core.otp.OtpConnection
+import com.yubico.yubikit.core.smartcard.SmartCardConnection
+import com.yubico.yubikit.management.DeviceInfo
 import com.yubico.yubikit.support.DeviceUtil
 
-suspend fun getDeviceInfo(device: YubiKeyDevice): Info =
-    try {
-        withSmartCardConnection(device) {
-            val pid = (device as? UsbYubiKeyDevice)?.pid
-            val deviceInfo = DeviceUtil.readInfo(it, pid)
-            val name = DeviceUtil.getName(deviceInfo, pid?.type)
-            deviceInfo.model(name, device is NfcYubiKeyDevice, pid?.value)
-        }
-    } catch (exception: Exception) {
+suspend fun getDeviceInfo(device: YubiKeyDevice): Info {
+    val pid = (device as? UsbYubiKeyDevice)?.pid
+
+    val deviceInfo = runCatching {
+        device.withConnection<SmartCardConnection, DeviceInfo> { DeviceUtil.readInfo(it, pid) }
+    }.recoverCatching {
         Log.d(OathManager.TAG, "Smart card connection not available")
-        try {
-            withOTPConnection(device) {
-                val pid = (device as? UsbYubiKeyDevice)?.pid
-                val deviceInfo = DeviceUtil.readInfo(it, pid)
-                val name = DeviceUtil.getName(deviceInfo, pid?.type)
-                deviceInfo.model(name, device is NfcYubiKeyDevice, pid?.value)
-            }
-        } catch (exception: Exception) {
-            Log.d(OathManager.TAG, "OTP connection not available")
-            try {
-                withFidoConnection(device) {
-                    val pid = (device as? UsbYubiKeyDevice)?.pid
-                    val deviceInfo = DeviceUtil.readInfo(it, pid)
-                    val name = DeviceUtil.getName(deviceInfo, pid?.type)
-                    deviceInfo.model(name, device is NfcYubiKeyDevice, pid?.value)
-                }
-            } catch (exception: Exception) {
-                Log.e(OathManager.TAG, "No connection available for getting device info")
-                throw exception
-            }
-        }
-    }
+        device.withConnection<OtpConnection, DeviceInfo> { DeviceUtil.readInfo(it, pid) }
+    }.recoverCatching {
+        Log.d(OathManager.TAG, "OTP connection not available")
+        device.withConnection<FidoConnection, DeviceInfo> { DeviceUtil.readInfo(it, pid) }
+    }.recoverCatching {
+        Log.d(OathManager.TAG, "FIDO connection not available")
+        return SkyHelper.getDeviceInfo(device)
+    }.getOrElse {
+        Log.e(OathManager.TAG, "Failed to recognize device")
+        throw it
+    }
+
+    val name = DeviceUtil.getName(deviceInfo, pid?.type)
+    return deviceInfo.model(name, device is NfcYubiKeyDevice, pid?.value)
+}

android/app/src/main/kotlin/com/yubico/authenticator/yubikit/SkyHelper.kt

@@ -0,0 +1,106 @@
+package com.yubico.authenticator.yubikit
+
+import com.yubico.authenticator.device.Info
+import com.yubico.authenticator.management.model
+import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
+import com.yubico.yubikit.core.Transport
+import com.yubico.yubikit.core.UsbPid
+import com.yubico.yubikit.core.Version
+import com.yubico.yubikit.core.YubiKeyDevice
+import com.yubico.yubikit.management.DeviceConfig
+import com.yubico.yubikit.management.DeviceInfo
+import com.yubico.yubikit.management.FormFactor
+import java.util.regex.Pattern
+
+class SkyHelper {
+    companion object {
+        private val VERSION_0 = Version(0, 0, 0)
+        private val VERSION_3 = Version(3, 0, 0)
+        private val VERSION_4 = Version(4, 0, 0)
+
+        private val USB_VERSION_STRING_PATTERN: Pattern =
+            Pattern.compile("\\b(\\d{1,3})\\.(\\d)(\\d+)\\b")
+
+        /**
+         * Retrieves a [DeviceInfo] from USB Security YubiKey (SKY).
+         *
+         * Should be only used as last resort when all other DeviceInfo queries failed because
+         * the returned information might not be accurate.
+         *
+         * @param device YubiKeyDevice to get DeviceInfo for. Should be USB and SKY device
+         * @return [DeviceInfo] instance initialized with information from USB descriptors.
+         * @throws IllegalArgumentException if [device] is not instance of [UsbYubiKeyDevice] or
+         * if the USB device has wrong PID
+         */
+        fun getDeviceInfo(device: YubiKeyDevice): Info {
+            if (device !is UsbYubiKeyDevice) {
+                throw IllegalArgumentException()
+            }
+
+            val pid = device.pid
+
+            if (pid !in listOf(UsbPid.YK4_FIDO, UsbPid.SKY_FIDO, UsbPid.NEO_FIDO)) {
+                throw IllegalArgumentException()
+            }
+
+            val usbVersion = validateVersionForPid(getVersionFromUsbDescriptor(device), pid)
+
+            // build DeviceInfo containing only USB product name and USB version
+            // we assume this is a Security Key based on the USB PID
+            return DeviceInfo(
+                DeviceConfig.Builder().enabledCapabilities(Transport.USB, 0).build(),
+                null,
+                usbVersion,
+                FormFactor.UNKNOWN,
+                mapOf(Transport.USB to 0),
+                false,
+                false,
+                true
+            ).model(device.usbDevice.productName ?: "YubiKey Security Key", false, pid.value)
+        }
+
+        // try to convert USB version to YubiKey version
+        private fun getVersionFromUsbDescriptor(device: UsbYubiKeyDevice): Version {
+            val version = device.usbDevice.version
+            val match = USB_VERSION_STRING_PATTERN.matcher(version)
+
+            if (match.find()) {
+                val major = match.group(1)?.toByte() ?: 0
+                val minor = match.group(2)?.toByte() ?: 0
+                val patch = match.group(3)?.toByte() ?: 0
+                return Version(major, minor, patch)
+            }
+
+            return VERSION_0
+        }
+
+        /**
+         * Check whether usbVersion is in expected range defined by UsbPid
+         *
+         * @return original version or [Version(0,0,0)] indicating invalid/unknown version
+         */
+        private fun validateVersionForPid(usbVersion: Version, pid: UsbPid): Version {
+            if ((pid == UsbPid.NEO_FIDO && usbVersion.inRange(VERSION_3, VERSION_4)) ||
+                (pid == UsbPid.SKY_FIDO && usbVersion.isAtLeast(VERSION_3)) ||
+                (pid == UsbPid.YK4_FIDO && usbVersion.isAtLeast(VERSION_4))
+            ) {
+                return usbVersion
+            }
+            return VERSION_0
+        }
+
+        /** Check if this version is at least v1 and less than v2
+         * @return true if this is in range [v1,v2)
+         */
+        private fun Version.inRange(v1: Version, v2: Version): Boolean {
+            return this >= v1 && this < v2
+        }
+
+        /** Check if this version is at least v
+         * @return true if this >= v
+         */
+        private fun Version.isAtLeast(v: Version): Boolean {
+            return this >= v
+        }
+    }
+}

android/app/src/main/res/values-night/styles.xml

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             Flutter draws its first frame -->
-        <item name="android:windowBackground">@drawable/launch_background</item>
-    </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
-        <item name="android:windowBackground">?android:colorBackground</item>
-    </style>
-</resources>

android/app/src/main/res/values-v26/styles.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+        <item name="android:defaultFocusHighlightEnabled">false</item>
+    </style>
+</resources>

android/app/src/main/res/values/strings.xml

@@ -1,4 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_label">Yubico Authenticator</string>
+    <string name="app_label">Yubico Authenticator Preview</string>
+    <string name="otp_success_set_otp_to_clipboard">Successfully copied OTP code from YubiKey to clipboard.</string>
+    <string name="otp_success_set_password_to_clipboard">Successfully copied password from YubiKey to clipboard.</string>
+    <string name="otp_parse_failure">Failed to parse OTP code from YubiKey.</string>
+    <string name="otp_set_clip_failure">Failed to access clipboard when trying to copy OTP code from YubiKey.</string>
 </resources>

android/app/src/main/res/values/styles.xml

@@ -15,4 +15,15 @@
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+
+    <style name="NdefActivityTheme" parent="NormalTheme">
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowAnimationStyle">@null</item>
+        <item name="android:windowDisablePreview">true</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+    </style>
 </resources>

android/app/src/test/java/com/yubico/authenticator/oath/ModelTest.kt

@@ -1,26 +1,31 @@
 package com.yubico.authenticator.oath
 
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
 import com.yubico.authenticator.device.Version
 import com.yubico.authenticator.oath.OathTestHelper.code
 import com.yubico.authenticator.oath.OathTestHelper.emptyCredentials
 import com.yubico.authenticator.oath.OathTestHelper.hotp
 import com.yubico.authenticator.oath.OathTestHelper.totp
 import org.junit.Assert.*
+import org.junit.Rule
 
 import org.junit.Test
 
 class ModelTest {
 
-    private val model = Model()
+    @get:Rule
+    val rule = InstantTaskExecutorRule()
+
+    private val viewModel = OathViewModel()
 
     private fun connectDevice(deviceId: String) {
-        model.session = Model.Session(
+        viewModel.setSessionState(Model.Session(
             deviceId,
             Version(1, 2, 3),
             isAccessKeySet = false,
             isRemembered = false,
             isLocked = false
-        )
+        ))
     }
 
     @Test
@@ -29,53 +34,40 @@ class ModelTest {
         assertEquals(0x20.toByte(), Model.OathType.TOTP.value)
     }
 
-    @Test
-    fun `hotp is interactive`() {
-        assertTrue(hotp().isInteractive())
-    }
-
-    @Test
-    fun `totp with touch is interactive`() {
-        assertTrue(totp(touchRequired = true).isInteractive())
-    }
-
-    @Test
-    fun `totp without touch is not interactive`() {
-        assertFalse(totp(touchRequired = false).isInteractive())
-    }
-
     @Test
     fun `has no credentials after initialization`() {
-        assertTrue(model.credentials.isEmpty())
+        assertNull(viewModel.credentials.value)
     }
 
     @Test
     fun `updates empty model`() {
-
         val d = "device1"
+        connectDevice(d)
         val m = mapOf(totp(d) to code())
-        model.update(d, m)
+        viewModel.updateCredentials(m)
 
-        assertEquals(1, model.credentials.size)
+        assertEquals(1, viewModel.credentials.value?.size)
     }
 
     @Test
     fun `replaces credentials on device change`() {
         val d1 = "device1"
+        connectDevice(d1)
         val m1 = mapOf(
             totp(d1) to code(),
             totp(d1) to code()
         )
-        model.update(d1, m1)
+        viewModel.updateCredentials(m1)
 
-        val d2 = "device2"
+        connectDevice("device2")
         val m2 = emptyCredentials()
-        model.update(d2, m2)
+        viewModel.updateCredentials(m2)
 
-        assertTrue(model.credentials.isEmpty())
+        assertTrue(viewModel.credentials.value!!.isEmpty())
 
-        model.update(d1, m1)
-        assertEquals(2, model.credentials.size)
+        connectDevice("device1")
+        viewModel.updateCredentials(m1)
+        assertEquals(2, viewModel.credentials.value!!.size)
     }
 
     @Test
@@ -92,7 +84,7 @@ class ModelTest {
             cred2 to code()
         )
         connectDevice(d1)
-        model.update(d1, m1)
+        viewModel.updateCredentials(m1)
 
         // one more credential was added
         val m2 = mapOf(
@@ -101,13 +93,13 @@ class ModelTest {
             cred1 to code()
         )
 
-        model.update(d1, m2)
+        viewModel.updateCredentials(m2)
 
-        assertEquals("device1", model.session?.deviceId)
-        assertEquals(3, model.credentials.size)
-        assertTrue(model.credentials.find { it.credential == cred1 } != null)
-        assertTrue(model.credentials.find { it.credential == cred2 } != null)
-        assertTrue(model.credentials.find { it.credential == cred3 } != null)
+        assertEquals("device1", viewModel.sessionState.value?.deviceId)
+        assertEquals(3, viewModel.credentials.value!!.size)
+        assertTrue(viewModel.credentials.value!!.find { it.credential == cred1 } != null)
+        assertTrue(viewModel.credentials.value!!.find { it.credential == cred2 } != null)
+        assertTrue(viewModel.credentials.value!!.find { it.credential == cred3 } != null)
     }
 
     @Test
@@ -115,21 +107,24 @@ class ModelTest {
         val cred = totp(name = "cred1")
         val code = code(value = "123456")
         val m1 = mapOf(cred to code)
-        model.update(cred.deviceId, m1)
 
-        assertTrue(model.credentials.find { it.code == code } != null)
+        connectDevice(cred.deviceId)
+        viewModel.updateCredentials(m1)
+
+        assertTrue(viewModel.credentials.value?.find { it.code == code } != null)
 
         val updatedCode = code(value = "121212")
         val m2 = mapOf(cred to updatedCode)
-        model.update(cred.deviceId, m2)
+        viewModel.updateCredentials(m2)
 
-        assertTrue(model.credentials.find { it.code == updatedCode } != null)
+        assertTrue(viewModel.credentials.value?.find { it.code == updatedCode } != null)
     }
 
     @Test
     fun `update uses all credentials from its input `() {
         val d = "device"
-        model.update(d, emptyCredentials())
+        connectDevice(d)
+        viewModel.updateCredentials(emptyCredentials())
 
         // in next update the device has credentials
         val totp1 = totp(deviceId = d, name = "totp1", touchRequired = false)
@@ -142,49 +137,51 @@ class ModelTest {
         val code4 = code(value = "4444")
 
         val m1 = mapOf(totp1 to code1, totp2 to code2, hotp1 to code3, hotp2 to code4)
-        model.update(d, m1)
+        viewModel.updateCredentials(m1)
 
         // all four are present
-        val foundTotp1 = model.credentials.find { it.credential == totp1 }
+        val foundTotp1 = viewModel.credentials.value?.find { it.credential == totp1 }
         assertTrue(foundTotp1 != null)
         assertEquals("111111", foundTotp1?.code?.value)
 
-        val foundTotp2 = model.credentials.find { it.credential == totp2 }
+        val foundTotp2 = viewModel.credentials.value?.find { it.credential == totp2 }
         assertTrue(foundTotp2 != null)
         assertEquals("222222", foundTotp2?.code?.value)
 
-        val foundHotp1 = model.credentials.find { it.credential == hotp1 }
+        val foundHotp1 = viewModel.credentials.value?.find { it.credential == hotp1 }
         assertTrue(foundHotp1 != null)
         assertEquals("33333", foundHotp1?.code?.value)
 
-        val foundHotp2 = model.credentials.find { it.credential == hotp2 }
+        val foundHotp2 = viewModel.credentials.value?.find { it.credential == hotp2 }
         assertTrue(foundHotp2 != null)
         assertEquals("4444", foundHotp2?.code?.value)
 
     }
 
     @Test
-    fun `update preserves non-interactive codes`() {
+    fun `update without code preserves existing value`() {
         val d = "device"
         val totp = totp(d, name = "totpCred")
         val totpCode: Model.Code? = null
 
         val hotp = hotp(d, name = "hotpCred")
-        val hotpCode: Model.Code? = null
+        val hotpCode: Model.Code? = code(value = "098765")
 
         val m1 = mapOf(hotp to hotpCode, totp to totpCode)
-        model.update(d, m1)
 
-        assertTrue(model.credentials.find { it.code == hotpCode } != null)
+        connectDevice(d)
+        viewModel.updateCredentials(m1)
+
+        assertTrue(viewModel.credentials.value?.find { it.code == hotpCode } != null)
 
         val updatedTotpCode = code(value = "121212")
-        val updatedHotpCode = code(value = "098765")
+        val updatedHotpCode = null
         val m2 = mapOf(hotp to updatedHotpCode, totp to updatedTotpCode)
-        model.update(d, m2)
+        viewModel.updateCredentials(m2)
 
-        assertTrue(model.credentials.find { it.code == updatedTotpCode } != null)
-        assertTrue(model.credentials.find { it.code == hotpCode } != null)
-        assertFalse(model.credentials.find { it.code == updatedHotpCode } != null)
+        assertTrue(viewModel.credentials.value?.find { it.code == updatedTotpCode } != null)
+        assertTrue(viewModel.credentials.value?.find { it.code == hotpCode } != null)
+        assertFalse(viewModel.credentials.value?.find { it.code == updatedHotpCode } != null)
     }
 
     @Test
@@ -194,17 +191,18 @@ class ModelTest {
         val totpCode: Model.Code? = null
 
         connectDevice(d)
-        model.update(d, mapOf(totp to totpCode))
+        viewModel.updateCredentials(mapOf(totp to totpCode))
 
         // simulate touch
-        val newCode = model.updateCode(d, totp, code(value = "00000"))
+        viewModel.updateCode(totp, code(value = "00000"))
+        val newCode = viewModel.credentials.value?.find { it.credential == totp }?.code
         assertNotNull(newCode)
 
         // update with same values
-        model.update(d, mapOf(totp to newCode))
+        viewModel.updateCredentials(mapOf(totp to newCode))
 
-        assertEquals(1, model.credentials.size)
-        assertEquals("00000", model.credentials.find { it.credential == totp }?.code?.value)
+        assertEquals(1, viewModel.credentials.value?.size)
+        assertEquals("00000", viewModel.credentials.value?.find { it.credential == totp }?.code?.value)
     }
 
     @Test
@@ -212,16 +210,17 @@ class ModelTest {
         val d = "Device"
         val t1 = totp()
         val c1 = code()
-        model.update(d, mapOf(t1 to c1))
+        connectDevice(d)
+        viewModel.updateCredentials(mapOf(t1 to c1))
 
         val t2 = totp()
         val c2 = code()
         val t3 = totp()
         val c3 = code()
-        model.update(d, mapOf(t3 to c3, t2 to c2, t1 to c1))
+        viewModel.updateCredentials(mapOf(t3 to c3, t2 to c2, t1 to c1))
 
         // t3 and t2 are added to credentials
-        assertEquals(3, model.credentials.size)
+        assertEquals(3, viewModel.credentials.value?.size)
     }
 
     @Test
@@ -234,30 +233,35 @@ class ModelTest {
         val t3 = totp()
         val c3 = code()
 
-        model.update(d, mapOf(t3 to c3, t1 to c1, t2 to c2))
-        assertEquals(3, model.credentials.size)
+        connectDevice(d)
+        viewModel.updateCredentials(mapOf(t3 to c3, t1 to c1, t2 to c2))
+        assertEquals(3, viewModel.credentials.value?.size)
 
-        model.update(d, mapOf(t1 to c1))
+        viewModel.updateCredentials(mapOf(t1 to c1))
 
         // only t1 is part of credentials
-        assertEquals(1, model.credentials.size)
-        assertTrue(model.credentials.find { it.credential == t1 } != null)
+        assertEquals(1, viewModel.credentials.value?.size)
+        assertTrue(viewModel.credentials.value?.find { it.credential == t1 } != null)
     }
 
     @Test
     fun `adds one credential with code to empty`() {
         val d = "device"
-        model.update(d, mapOf(totp() to code()))
+        connectDevice(d)
+        viewModel.updateCredentials(mapOf(totp() to code()))
 
-        assertEquals(1, model.credentials.size)
+        assertEquals(1, viewModel.credentials.value?.size)
     }
 
     @Test
     fun `does not add one credential with code to not initialized model`() {
         val d = "device"
-        model.add(d, totp(), code())
+        connectDevice(d)
+        assertThrows(IllegalArgumentException::class.java) {
+            viewModel.addCredential(totp(), code())
+        }
 
-        assertEquals(0, model.credentials.size)
+        assertEquals(0, viewModel.credentials.value?.size ?: 0)
     }
 
     @Test
@@ -265,15 +269,17 @@ class ModelTest {
         val d1 = "device1"
         val d2 = "device2"
         connectDevice(d1)
-        model.update(d1, mapOf(totp() to code()))
+        viewModel.updateCredentials(mapOf(totp(d1) to code()))
 
         // cannot add to this model
-        assertNull(model.add(d2, totp(), code()))
+        assertThrows(IllegalArgumentException::class.java) {
+            viewModel.addCredential(totp(), code())
+        }
 
         // can add to this model
-        assertNotNull(model.add(d1, totp(), code()))
+        assertNotNull(viewModel.addCredential(totp(d1), code()))
 
-        assertEquals(2, model.credentials.size)
+        assertEquals(2, viewModel.credentials.value?.size)
     }
 
     @Test
@@ -284,18 +290,23 @@ class ModelTest {
         val code1 = code()
 
         connectDevice(d1)
-        model.update(d1, mapOf(toRename to code1))
+        viewModel.updateCredentials(mapOf(toRename to code1))
 
         val renamedForD2 = totp(d2, name = "newName", issuer = "newIssuer")
-        assertNull(model.rename(d1, toRename, renamedForD2))
+        assertThrows(IllegalArgumentException::class.java) {
+            viewModel.renameCredential(toRename, renamedForD2)
+        }
 
         val renamedForD1 = totp(d1, name = "newName", issuer = "newIssuer")
         // trying to rename on wrong device
-        assertNull(model.rename(d2, toRename, renamedForD2))
+        assertThrows(IllegalArgumentException::class.java) {
+            viewModel.renameCredential(toRename, renamedForD2)
+        }
 
 
         // rename success
-        val renamed = model.rename(d1, toRename, renamedForD1)
+        viewModel.renameCredential(toRename, renamedForD1)
+        val renamed = viewModel.credentials.value?.find { it.credential == renamedForD1 }?.credential
         assertNotNull(renamed)
 
         // the name and issuer are correct
@@ -310,15 +321,17 @@ class ModelTest {
         val code1 = code()
 
         connectDevice(d)
-        model.update(d, mapOf(toRename to code1))
+        viewModel.updateCredentials(mapOf(toRename to code1))
 
         val nullIssuer = totp(d, name = "newName", issuer = null)
-        val renamed = model.rename(d, toRename, nullIssuer)
+        viewModel.renameCredential(toRename, nullIssuer)
+        val renamed = viewModel.credentials.value?.find { it.credential == nullIssuer }?.credential
 
         assertNull(renamed!!.issuer)
 
         val nonNullIssuer = totp(d, name = "newName", issuer = "valueHere")
-        val renamed2 = model.rename(d, renamed, nonNullIssuer)
+        viewModel.renameCredential(nullIssuer, nonNullIssuer)
+        val renamed2 = viewModel.credentials.value?.find { it.credential == nonNullIssuer }?.credential
 
         assertNotNull(renamed2!!.issuer)
     }
@@ -333,16 +346,17 @@ class ModelTest {
         val code2 = code(value = "00000")
 
         connectDevice(d1)
-        model.update(d1, mapOf(totpD1 to code1))
-
-        // cant update on different device
-        assertNull(model.updateCode(d2, totpD1, code()))
+        viewModel.updateCredentials(mapOf(totpD1 to code1))
 
         // cant update for credential from different device
-        assertNull(model.updateCode(d1, totpD2, code()))
+        // TODO: This should fail
+        assertThrows(NullPointerException::class.java) {
+            viewModel.updateCode(totpD2, code())
+        }
 
         // updates correctly to new code
-        val newCode = model.updateCode(d1, totpD1, code2)
+        viewModel.updateCode(totpD1, code2)
+        val newCode = viewModel.credentials.value?.find { it.credential == totpD1 }?.code
         assertNotNull(newCode)
         assertEquals("00000", newCode!!.value!!)
     }
@@ -351,10 +365,10 @@ class ModelTest {
     fun `removes data on reset`() {
         val deviceId = "device"
         connectDevice(deviceId)
-        model.update(deviceId, mapOf(totp() to code()))
-        model.reset()
+        viewModel.updateCredentials(mapOf(totp() to code()))
+        viewModel.setSessionState(null)
 
-        assertNull(model.session)
-        assertTrue(model.credentials.isEmpty())
+        assertNull(viewModel.sessionState.value)
+        assertNull(viewModel.credentials.value)
     }
 }

android/app/src/test/java/com/yubico/authenticator/oath/SerializationTest.kt

@@ -1,6 +1,7 @@
 package com.yubico.authenticator.oath
 
 import com.yubico.authenticator.device.Version
+import com.yubico.authenticator.jsonSerializer
 import com.yubico.authenticator.oath.OathTestHelper.code
 import com.yubico.authenticator.oath.OathTestHelper.hotp
 import com.yubico.authenticator.oath.OathTestHelper.totp

android/app/src/test/java/com/yubico/authenticator/yubikit/SkyHelperTest.kt

@@ -0,0 +1,194 @@
+package com.yubico.authenticator.yubikit
+
+import android.hardware.usb.UsbDevice
+import com.yubico.authenticator.device.Version
+import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
+import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
+import com.yubico.yubikit.core.UsbPid
+import org.junit.Assert.*
+import org.junit.Test
+import org.mockito.Mockito.`when`
+import org.mockito.Mockito.mock
+
+
+class SkyHelperTest {
+
+    @Test
+    fun `passing NfcYubiKeyDevice will throw`() {
+        assertThrows(IllegalArgumentException::class.java) {
+            SkyHelper.getDeviceInfo(mock(NfcYubiKeyDevice::class.java))
+        }
+    }
+
+    @Test
+    fun `supports three specific UsbPids`() {
+        for (pid in UsbPid.values()) {
+            val ykDevice = getUsbYubiKeyDeviceMock().also {
+                `when`(it.pid).thenReturn(pid)
+            }
+
+            if (pid in listOf(UsbPid.YK4_FIDO, UsbPid.SKY_FIDO, UsbPid.NEO_FIDO)) {
+                // these will not throw
+                assertNotNull(SkyHelper.getDeviceInfo(ykDevice))
+            } else {
+                // all other will throw
+                assertThrows(IllegalArgumentException::class.java) {
+                    SkyHelper.getDeviceInfo(ykDevice)
+                }
+            }
+        }
+    }
+
+    @Test
+    fun `handles NEO_FIDO versions`() {
+        val ykDevice = getUsbYubiKeyDeviceMock().also {
+            `when`(it.pid).thenReturn(UsbPid.NEO_FIDO)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("3.00")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(3, 0, 0))
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("3.47")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(3, 4, 7))
+        }
+
+        // lower than 3 should return 0.0.0
+        `when`(ykDevice.usbDevice.version).thenReturn("2.10")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        // greater or equal 4.0.0 should return 0.0.0
+        `when`(ykDevice.usbDevice.version).thenReturn("4.00")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.37")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+    }
+
+    @Test
+    fun `handles SKY_FIDO versions`() {
+        val ykDevice = getUsbYubiKeyDeviceMock().also {
+            `when`(it.pid).thenReturn(UsbPid.SKY_FIDO)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("3.00")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(3, 0, 0))
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("3.47")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(3, 4, 7))
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.00")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(4, 0, 0))
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.37")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(4, 3, 7))
+        }
+
+        // lower than 3 should return 0.0.0
+        `when`(ykDevice.usbDevice.version).thenReturn("2.10")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+    }
+
+    @Test
+    fun `handles YK4_FIDO versions`() {
+        val ykDevice = getUsbYubiKeyDeviceMock().also {
+            `when`(it.pid).thenReturn(UsbPid.YK4_FIDO)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.00")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(4, 0, 0))
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.37")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, Version(4, 3, 7))
+        }
+
+        // lower than 4 should return 0.0.0
+        `when`(ykDevice.usbDevice.version).thenReturn("3.47")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+    }
+
+    @Test
+    fun `returns Version 0 for invalid input`() {
+        val ykDevice = getUsbYubiKeyDeviceMock().also {
+            `when`(it.pid).thenReturn(UsbPid.SKY_FIDO)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("yubico")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.0")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+        `when`(ykDevice.usbDevice.version).thenReturn("4.0.0")
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.version, VERSION_0)
+        }
+
+    }
+
+    @Test
+    fun `returns default product name`() {
+        val ykDevice = getUsbYubiKeyDeviceMock()
+        `when`(ykDevice.pid).thenReturn(UsbPid.SKY_FIDO)
+        `when`(ykDevice.usbDevice.version).thenReturn("5.50")
+        `when`(ykDevice.usbDevice.productName).thenReturn(null)
+
+        SkyHelper.getDeviceInfo(ykDevice).also {
+            assertEquals(it.name, "YubiKey Security Key")
+        }
+    }
+
+    companion object {
+        fun getUsbYubiKeyDeviceMock(): UsbYubiKeyDevice = mock(UsbYubiKeyDevice::class.java).also {
+            `when`(it.pid).thenReturn(UsbPid.YKS_OTP)
+            `when`(it.usbDevice).thenReturn(mock(UsbDevice::class.java))
+            `when`(it.usbDevice.productName).thenReturn("")
+            `when`(it.usbDevice.version).thenReturn("")
+        }
+
+        private val VERSION_0 = Version(0, 0, 0)
+    }
+
+}

android/build.gradle

@@ -1,14 +1,15 @@
 buildscript {
-    ext.kotlin_version = '1.6.21'
+    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.1.3'
+        classpath 'com.android.tools.build:gradle:7.2.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
+        classpath 'com.google.android.gms:oss-licenses-plugin:0.10.5'
     }
 }
 
@@ -16,6 +17,7 @@ allprojects {
     repositories {
         google()
         mavenCentral()
+        mavenLocal()  // TODO: Remove this before release
     }
 
     project.ext {
@@ -24,7 +26,7 @@ allprojects {
         compileSdkVersion = 32
         buildToolsVersion = "30.0.3"
 
-        yubiKitVersion = "2.1.0-alpha.1"
+        yubiKitVersion = "2.1.0"
         junitVersion = "4.13.2"
         mockitoVersion = "3.9.0"
     }

android/flutter_plugins/qrscanner_zxing/android/build.gradle

@@ -1,8 +1,8 @@
 group 'com.yubico.authenticator.flutter_plugins.qrscanner_zxing'
-version '1.0-SNAPSHOT'
+version '1.0'
 
 buildscript {
-    ext.kotlin_version = '1.6.21'
+    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         mavenCentral()
@@ -46,7 +46,7 @@ android {
 }
 
 dependencies {
-    def camerax_version = "1.1.0-beta03"
+    def camerax_version = "1.1.0"
     implementation "androidx.camera:camera-lifecycle:${camerax_version}"
     implementation "androidx.camera:camera-view:${camerax_version}"
     implementation "androidx.camera:camera-camera2:${camerax_version}"

android/flutter_plugins/qrscanner_zxing/android/src/main/kotlin/com/yubico/authenticator/flutter_plugins/qrscanner_zxing/QRScannerView.kt

@@ -3,18 +3,22 @@ package com.yubico.authenticator.flutter_plugins.qrscanner_zxing
 import android.Manifest
 import android.app.Activity
 import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageManager
+import android.net.Uri
 import android.os.Handler
 import android.os.Looper
+import android.provider.Settings
 import android.util.Log
 import android.view.View
-import android.widget.TextView
 import androidx.camera.core.*
 import androidx.camera.lifecycle.ProcessCameraProvider
 import androidx.camera.view.PreviewView
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
+import androidx.core.content.ContextCompat.startActivity
 import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.Observer
 import com.google.zxing.*
 import com.google.zxing.common.HybridBinarizer
 import io.flutter.plugin.common.BinaryMessenger
@@ -52,12 +56,13 @@ typealias BarcodeAnalyzerListener = (Result<String>) -> Unit
 
 internal class QRScannerView(
     context: Context,
-    id: Int,
+    @Suppress("UNUSED_PARAMETER") id : Int,
     binaryMessenger: BinaryMessenger,
     private val permissionsResultRegistrar: PermissionsResultRegistrar,
     creationParams: Map<String?, Any?>?
 ) : PlatformView {
 
+    private val stateChangeObserver = StateChangeObserver(context)
     private val uiThreadHandler = Handler(Looper.getMainLooper())
 
     private var marginPct: Double? = null
@@ -97,8 +102,8 @@ internal class QRScannerView(
     private val qrScannerView = View.inflate(context, R.layout.qr_scanner_view, null)
     private val previewView = qrScannerView.findViewById<PreviewView>(R.id.preview_view).also {
         it.scaleType = PreviewView.ScaleType.FILL_CENTER
+        it.implementationMode = PreviewView.ImplementationMode.PERFORMANCE
     }
-    private val infoText = qrScannerView.findViewById<TextView>(R.id.info_text)
 
     private val cameraExecutor: ExecutorService = Executors.newSingleThreadExecutor()
     private val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
@@ -117,6 +122,7 @@ internal class QRScannerView(
         preview = null
         imageAnalyzer = null
         cameraExecutor.shutdown()
+        methodChannel.setMethodCallHandler(null)
         Log.d(TAG, "View disposed")
     }
 
@@ -142,6 +148,20 @@ internal class QRScannerView(
             } else {
                 bindUseCases(context)
             }
+
+            methodChannel.setMethodCallHandler { call, _ ->
+                if (call.method =="requestCameraPermissions") {
+                    requestPermissionsFromUser(context)
+
+                    val intent = Intent(
+                        Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                        Uri.parse("package:" + context.getPackageName())
+                    )
+                    intent.addCategory(Intent.CATEGORY_DEFAULT)
+                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                    startActivity(context, intent, null)
+                }
+            }
         }
     }
 
@@ -159,17 +179,14 @@ internal class QRScannerView(
                                 grantResults.first() == PackageManager.PERMISSION_GRANTED
                             ) {
                                 previewView.visibility = View.VISIBLE
-                                infoText.visibility = View.GONE
                                 bindUseCases(activity)
                             } else {
                                 previewView.visibility = View.GONE
-                                infoText.visibility = View.VISIBLE
-                                infoText.setText(R.string.please_grant_permissions)
+                                reportViewInitialized(false)
                             }
                         } else {
                             previewView.visibility = View.GONE
-                            infoText.visibility = View.VISIBLE
-                            infoText.setText(R.string.please_grant_permissions)
+                            reportViewInitialized(false)
                         }
                         return true
                     }
@@ -181,8 +198,28 @@ internal class QRScannerView(
         requestPermissions(activity)
     }
 
+    private fun reportViewInitialized(permissionsGranted: Boolean) {
+        uiThreadHandler.post {
+            methodChannel.invokeMethod(
+                "viewInitialized",
+                JSONObject(mapOf("permissionsGranted" to permissionsGranted)).toString()
+            )
+        }
+    }
+
+    private fun reportCodeFound(code: String) {
+        uiThreadHandler.post {
+            methodChannel.invokeMethod(
+                "codeFound", JSONObject(
+                    mapOf("value" to code)
+                ).toString()
+            )
+        }
+    }
+
     private fun bindUseCases(context: Context) {
         cameraProviderFuture.addListener({
+
             previewView.visibility = View.VISIBLE
             cameraProvider = cameraProviderFuture.get()
 
@@ -196,13 +233,7 @@ internal class QRScannerView(
                     it.setAnalyzer(cameraExecutor, BarcodeAnalyzer(marginPct) { analyzeResult ->
                         if (analyzeResult.isSuccess) {
                             analyzeResult.getOrNull()?.let { result ->
-                                uiThreadHandler.post {
-                                    methodChannel.invokeMethod(
-                                        "codeFound", JSONObject(
-                                            mapOf("value" to result)
-                                        ).toString()
-                                    )
-                                }
+                                reportCodeFound(result)
                             }
                         }
                     })
@@ -215,11 +246,18 @@ internal class QRScannerView(
                     it.setSurfaceProvider(previewView.surfaceProvider)
                 }
 
-            cameraProvider?.bindToLifecycle(
+            val camera = cameraProvider?.bindToLifecycle(
                 context as LifecycleOwner,
                 cameraSelector,
                 preview, imageAnalyzer
             )
+
+            camera?.cameraInfo?.cameraState?.let {
+                it.removeObservers(context as LifecycleOwner)
+                it.observe(context as LifecycleOwner, stateChangeObserver)
+            }
+
+            reportViewInitialized(true)
         }, ContextCompat.getMainExecutor(context))
     }
 
@@ -275,4 +313,24 @@ internal class QRScannerView(
         }
     }
 
+    private class StateChangeObserver(val context: Context) : Observer<CameraState> {
+        private var cameraOpened: Boolean = false
+
+        override fun onChanged(t: CameraState) {
+            Log.d(TAG, "Camera state changed to ${t.type}")
+
+            if (t.type == CameraState.Type.OPEN) {
+                cameraOpened = true
+            }
+
+            if (cameraOpened && t.type == CameraState.Type.CLOSED) {
+                Log.d(TAG, "Camera closed")
+                val stateChangedIntent =
+                    Intent("com.yubico.authenticator.QRScannerView.CameraClosed")
+                context.sendBroadcast(stateChangedIntent)
+                cameraOpened = false
+            }
+        }
+    }
+
 }

android/flutter_plugins/qrscanner_zxing/android/src/main/kotlin/com/yubico/authenticator/flutter_plugins/qrscanner_zxing/QRScannerZxingPlugin.kt

@@ -1,6 +1,5 @@
 package com.yubico.authenticator.flutter_plugins.qrscanner_zxing
 
-import androidx.annotation.NonNull
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.embedding.engine.plugins.activity.ActivityAware
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
@@ -38,7 +37,7 @@ class QRScannerZxingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware,
     private val registrar = PermissionsResultRegistrar()
     private lateinit var channel: MethodChannel
 
-    override fun onAttachedToEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+    override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {
         channel = MethodChannel(binding.binaryMessenger, "qrscanner_zxing")
         channel.setMethodCallHandler(this)
 
@@ -49,7 +48,7 @@ class QRScannerZxingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware,
             )
     }
 
-    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+    override fun onMethodCall(call: MethodCall, result: Result) {
         if (call.method == "getPlatformVersion") {
             result.success("Android ${android.os.Build.VERSION.RELEASE}")
         } else {
@@ -57,7 +56,7 @@ class QRScannerZxingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware,
         }
     }
 
-    override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
         channel.setMethodCallHandler(null)
     }
 

android/flutter_plugins/qrscanner_zxing/android/src/main/res/layout/qr_scanner_view.xml

@@ -2,28 +2,12 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@android:color/background_dark">
-
-    <TextView
-        android:id="@+id/info_text"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center"
-        android:textColor="@android:color/black"
-        android:background="@android:color/background_light"
-        android:gravity="left"
-        android:textSize="12sp"
-        android:lineSpacingMultiplier="1.2"
-        android:layout_margin="32dp"
-        android:padding="16dp"
-        android:drawableStart="@android:drawable/ic_dialog_alert"
-        android:drawablePadding="16dp"
-        android:text="@string/please_grant_permissions" />
+    android:background="@android:color/black">
 
     <androidx.camera.view.PreviewView
-        android:visibility="gone"
         android:id="@+id/preview_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:visibility="gone" />
 
 </FrameLayout>

android/flutter_plugins/qrscanner_zxing/android/src/main/res/values/strings.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="please_grant_permissions">The QR scanner cannot work properly because grant of Camera permissions is missing.\n\nPlease, fix this by changing the Camera permissions setting in the phone Settings.</string>
-    <string name="initializing">Please wait…</string>
-</resources>

android/flutter_plugins/qrscanner_zxing/example/lib/main.dart

@@ -79,6 +79,9 @@ class QRScannerPageState extends State<QRScannerPage> {
             right: 0,
             child: QRScannerZxingView(
                 marginPct: 10,
+                onViewInitialized: (permissionsGranted) {
+                  // this example does not handle Camera permissions
+                },
                 onDetect: (result) {
                   if (currentCode == null) {
                     setState(() {

android/flutter_plugins/qrscanner_zxing/lib/qrscanner_zxing_view.dart

@@ -9,9 +9,13 @@ import 'package:flutter/services.dart';
 class QRScannerZxingView extends StatefulWidget {
   final int marginPct;
   final Function(String rawData) onDetect;
+  final Function(bool permissionsGranted) onViewInitialized;
 
   const QRScannerZxingView(
-      {Key? key, required this.marginPct, required this.onDetect})
+      {Key? key,
+      required this.marginPct,
+      required this.onDetect,
+      required this.onViewInitialized})
       : super(key: key);
 
   @override
@@ -31,6 +35,11 @@ class QRScannerZxingViewState extends State<QRScannerZxingView> {
             var rawValue = arguments["value"];
             widget.onDetect(rawValue);
             return;
+          case "viewInitialized":
+            var arguments = jsonDecode(call.arguments);
+            var permissionsGranted = arguments["permissionsGranted"];
+            widget.onViewInitialized(permissionsGranted);
+            return;
         }
       } catch (e) {
         if (kDebugMode) {
@@ -40,6 +49,11 @@ class QRScannerZxingViewState extends State<QRScannerZxingView> {
     });
   }
 
+  void requestPermissions() {
+    debugPrint("Permissions requested");
+    channel.invokeMethod("requestCameraPermissions", null);
+  }
+
   @override
   void dispose() {
     super.dispose();

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Jun 23 08:50:38 CEST 2017
+#Mon Aug 15 14:34:17 CEST 2022
 distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
 distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
+zipStoreBase=GRADLE_USER_HOME

android/gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

android/gradlew.bat

@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/licenses/apache-2.0.txt

@@ -0,0 +1,203 @@
+                                 Apache License
+
+                           Version 2.0, January 2004
+
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+
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+
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+
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+
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+
+      To apply the Apache License to your work, attach the following
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+
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+   You may obtain a copy of the License at
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+       http://www.apache.org/licenses/LICENSE-2.0
+
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+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

android/licenses/cc0-1.0.txt

@@ -0,0 +1,131 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
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+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
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+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
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+
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
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+
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+

android/licenses/classpath.txt

@@ -0,0 +1,685 @@
+Classpath is distributed under the terms of the GNU General Public License with the following clarification and special exception.
+
+    Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination.
+
+    As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.
+
+As such, it can be used to run, create and distribute a large class of applications and applets. When GNU Classpath is used unmodified as the core class library for a virtual machine, compiler for the java languge, or for a program written in the java programming language it does not affect the licensing for distributing those programs directly.
+
+----
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
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+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
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+
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+
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+
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+
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+
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+
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+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
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+  "Additional permissions" are terms that supplement the terms of this
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+
+  Nothing in this License shall be construed as excluding or limiting
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+  12. No Surrender of Others' Freedom.
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+  13. Use with the GNU Affero General Public License.
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+  17. Interpretation of Sections 15 and 16.
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+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
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+Also add information on how to contact you by electronic and paper mail.
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+    <program>  Copyright (C) <year>  <name of author>
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+
+The hypothetical commands `show w' and `show c' should show the appropriate
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+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
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+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+

android/licenses/eclipse-1.0.txt

@@ -0,0 +1,210 @@
+Eclipse Public License - v 1.0
+
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
+LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM
+CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+   1. DEFINITIONS
+
+   "Contribution" means:
+
+a) in the case of the initial Contributor, the initial code and documentation
+distributed under this Agreement, and
+
+      b) in the case of each subsequent Contributor:
+
+         i) changes to the Program, and
+
+         ii) additions to the Program;
+
+where such changes and/or additions to the Program originate from and are
+distributed by that particular Contributor. A Contribution 'originates' from
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+anyone acting on such Contributor's behalf. Contributions do not include additions
+to the Program which: (i) are separate modules of software distributed in
+conjunction with the Program under their own license agreement, and (ii) are
+not derivative works of the Program.
+
+   "Contributor" means any person or entity that distributes the Program.
+
+"Licensed Patents" mean patent claims licensable by a Contributor which are
+necessarily infringed by the use or sale of its Contribution alone or when
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+
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+
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+
+   2. GRANT OF RIGHTS
+
+a) Subject to the terms of this Agreement, each Contributor hereby grants
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+
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+Patents to make, use, sell, offer to sell, import and otherwise transfer the
+Contribution of such Contributor, if any, in source code and object code form.
+This patent license shall apply to the combination of the Contribution and
+the Program if, at the time the Contribution is added by the Contributor,
+such addition of the Contribution causes such combination to be covered by
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+which include the Contribution. No hardware per se is licensed hereunder.
+
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+the Program, it is Recipient's responsibility to acquire that license before
+distributing the Program.
+
+d) Each Contributor represents that to its knowledge it has sufficient copyright
+rights in its Contribution, if any, to grant the copyright license set forth
+in this Agreement.
+
+   3. REQUIREMENTS
+
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+its own license agreement, provided that:
+
+      a) it complies with the terms and conditions of this Agreement; and
+
+      b) its license agreement:
+
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+
+      a) it must be made available under this Agreement; and
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+
+   4. COMMERCIAL DISTRIBUTION
+
+Commercial distributors of software may accept certain responsibilities with
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+who includes the Program in a commercial product offering should do so in
+a manner which does not create potential liability for other Contributors.
+Therefore, if a Contributor includes the Program in a commercial product offering,
+such Contributor ("Commercial Contributor") hereby agrees to defend and indemnify
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+in connection with its distribution of the Program in a commercial product
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+relating to any actual or alleged intellectual property infringement. In order
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+in any such claim at its own expense.
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+For example, a Contributor might include the Program in a commercial product
+offering, Product X. That Contributor is then a Commercial Contributor. If
+that Commercial Contributor then makes performance claims, or offers warranties
+related to Product X, those performance claims and warranties are such Commercial
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+damages.
+
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+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED ON
+AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS
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+to or loss of data, programs or equipment, and unavailability or interruption
+of operations.
+
+   6. DISCLAIMER OF LIABILITY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY
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+STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS
+GRANTED HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
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+
+If any provision of this Agreement is invalid or unenforceable under applicable
+law, it shall not affect the validity or enforceability of the remainder of
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+such provision shall be reformed to the minimum extent necessary to make such
+provision valid and enforceable.
+
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+cross-claim or counterclaim in a lawsuit) alleging that the Program itself
+(excluding combinations of the Program with other software or hardware) infringes
+such Recipient's patent(s), then such Recipient's rights granted under Section
+2(b) shall terminate as of the date such litigation is filed.
+
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+comply with any of the material terms or conditions of this Agreement and
+does not cure such failure in a reasonable period of time after becoming aware
+of such noncompliance. If all Recipient's rights under this Agreement terminate,
+Recipient agrees to cease use and distribution of the Program as soon as reasonably
+practicable. However, Recipient's obligations under this Agreement and any
+licenses granted by Recipient relating to the Program shall continue and survive.
+
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+in order to avoid inconsistency the Agreement is copyrighted and may only
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+Foundation may assign the responsibility to serve as the Agreement Steward
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+always be distributed subject to the version of the Agreement under which
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+under the new version. Except as expressly stated in Sections 2(a) and 2(b)
+above, Recipient receives no rights or licenses to the intellectual property
+of any Contributor under this Agreement, whether expressly, by implication,
+estoppel or otherwise. All rights in the Program not expressly granted under
+this Agreement are reserved.
+
+This Agreement is governed by the laws of the State of New York and the intellectual
+property laws of the United States of America. No party to this Agreement
+will bring a legal action under this Agreement more than one year after the
+cause of action arose. Each party waives its rights to a jury trial in any
+resulting litigation.

android/licenses/map.json

@@ -0,0 +1,8 @@
+{
+  "http://www.apache.org/licenses/LICENSE-2.0.txt": "apache-2.0.txt",
+  "https://www.apache.org/licenses/LICENSE-2.0.txt": "apache-2.0.txt",
+  "http://www.eclipse.org/legal/epl-v10.html": "eclipse-1.0.txt",
+  "http://www.gnu.org/software/classpath/license.html": "classpath.txt",
+  "http://opensource.org/licenses/MIT": "mit.txt",
+  "http://creativecommons.org/licenses/publicdomain": "cc0-1.0.txt"
+}

android/licenses/mit.txt

@@ -0,0 +1,9 @@
+The MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+

assets/licenses/.gitignore

@@ -1 +1,2 @@
 helper.json
+android/**

helper/poetry.lock

@@ -8,7 +8,7 @@ python-versions = "*"
 
 [[package]]
 name = "atomicwrites"
-version = "1.4.0"
+version = "1.4.1"
 description = "Atomic file writes."
 category = "dev"
 optional = false
@@ -16,17 +16,17 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "21.4.0"
+version = "22.1.0"
 description = "Classes Without Boilerplate"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.5"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
 docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "cloudpickle"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "cloudpickle"]
 
 [[package]]
 name = "cffi"
@@ -137,7 +137,7 @@ trio = ["trio", "async-generator"]
 
 [[package]]
 name = "keyring"
-version = "23.6.0"
+version = "23.8.2"
 description = "Store and access your passwords safely."
 category = "main"
 optional = false
@@ -151,7 +151,7 @@ SecretStorage = {version = ">=3.2", markers = "sys_platform == \"linux\""}
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=9)", "rst.linker (>=1.9)", "jaraco.tidelift (>=1.4)"]
-testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "flake8 (<5)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)"]
 
 [[package]]
 name = "macholib"
@@ -174,7 +174,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "numpy"
-version = "1.23.0"
+version = "1.23.1"
 description = "NumPy is the fundamental package for array computing with Python."
 category = "main"
 optional = false
@@ -244,7 +244,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pyinstaller"
-version = "5.1"
+version = "5.3"
 description = "PyInstaller bundles a Python application and all its dependencies into a single package."
 category = "dev"
 optional = false
@@ -253,7 +253,7 @@ python-versions = "<3.11,>=3.7"
 [package.dependencies]
 altgraph = "*"
 macholib = {version = ">=1.8", markers = "sys_platform == \"darwin\""}
-pefile = {version = ">=2017.8.1", markers = "sys_platform == \"win32\""}
+pefile = {version = ">=2022.5.30", markers = "sys_platform == \"win32\""}
 pyinstaller-hooks-contrib = ">=2021.4"
 pywin32-ctypes = {version = ">=0.2.0", markers = "sys_platform == \"win32\""}
 
@@ -263,7 +263,7 @@ hook_testing = ["pytest (>=2.7.3)", "execnet (>=1.5.0)", "psutil"]
 
 [[package]]
 name = "pyinstaller-hooks-contrib"
-version = "2022.7"
+version = "2022.8"
 description = "Community maintained hooks for PyInstaller"
 category = "dev"
 optional = false
@@ -374,15 +374,15 @@ resolved_reference = "32612d177db0d8dd768679ce26c4e509d10f2a97"
 
 [[package]]
 name = "zipp"
-version = "3.8.0"
+version = "3.8.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
 python-versions = ">=3.7"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=9)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)"]
+docs = ["sphinx", "jaraco.packaging (>=9)", "rst.linker (>=1.9)", "jaraco.tidelift (>=1.4)"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.3)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)"]
 
 [[package]]
 name = "zxing-cpp"
@@ -405,14 +405,8 @@ altgraph = [
     {file = "altgraph-0.17.2-py2.py3-none-any.whl", hash = "sha256:743628f2ac6a7c26f5d9223c91ed8ecbba535f506f4b6f558885a8a56a105857"},
     {file = "altgraph-0.17.2.tar.gz", hash = "sha256:ebf2269361b47d97b3b88e696439f6e4cbc607c17c51feb1754f90fb79839158"},
 ]
-atomicwrites = [
-    {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
-    {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
-]
-attrs = [
-    {file = "attrs-21.4.0-py2.py3-none-any.whl", hash = "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4"},
-    {file = "attrs-21.4.0.tar.gz", hash = "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"},
-]
+atomicwrites = []
+attrs = []
 cffi = [
     {file = "cffi-1.15.1-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:a66d3508133af6e8548451b25058d5812812ec3798c886bf38ed24a98216fab2"},
     {file = "cffi-1.15.1-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:470c103ae716238bbe698d67ad020e1db9d9dba34fa5a899b5e21577e6d52ed2"},
@@ -530,10 +524,7 @@ jeepney = [
     {file = "jeepney-0.8.0-py3-none-any.whl", hash = "sha256:c0a454ad016ca575060802ee4d590dd912e35c122fa04e70306de3d076cce755"},
     {file = "jeepney-0.8.0.tar.gz", hash = "sha256:5efe48d255973902f6badc3ce55e2aa6c5c3b3bc642059ef3a91247bcfcc5806"},
 ]
-keyring = [
-    {file = "keyring-23.6.0-py3-none-any.whl", hash = "sha256:372ff2fc43ab779e3f87911c26e6c7acc8bb440cbd82683e383ca37594cb0617"},
-    {file = "keyring-23.6.0.tar.gz", hash = "sha256:3ac00c26e4c93739e19103091a9986a9f79665a78cf15a4df1dba7ea9ac8da2f"},
-]
+keyring = []
 macholib = [
     {file = "macholib-1.16-py2.py3-none-any.whl", hash = "sha256:5a0742b587e6e57bfade1ab90651d4877185bf66fd4a176a488116de36878229"},
     {file = "macholib-1.16.tar.gz", hash = "sha256:001bf281279b986a66d7821790d734e61150d52f40c080899df8fefae056e9f7"},
@@ -542,30 +533,7 @@ mss = [
     {file = "mss-6.1.0-py3-none-any.whl", hash = "sha256:2722c5c9211ce29b4f1497fc2c70faecf9cdcb7653fa7f0f88e2231a31949b93"},
     {file = "mss-6.1.0.tar.gz", hash = "sha256:aebd069f3e05667fe9c7b9fa4b1771fe42a4710ce1058ce0236936ce06fa5394"},
 ]
-numpy = [
-    {file = "numpy-1.23.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:58bfd40eb478f54ff7a5710dd61c8097e169bc36cc68333d00a9bcd8def53b38"},
-    {file = "numpy-1.23.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:196cd074c3f97c4121601790955f915187736f9cf458d3ee1f1b46aff2b1ade0"},
-    {file = "numpy-1.23.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:f1d88ef79e0a7fa631bb2c3dda1ea46b32b1fe614e10fedd611d3d5398447f2f"},
-    {file = "numpy-1.23.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d54b3b828d618a19779a84c3ad952e96e2c2311b16384e973e671aa5be1f6187"},
-    {file = "numpy-1.23.0-cp310-cp310-win32.whl", hash = "sha256:2b2da66582f3a69c8ce25ed7921dcd8010d05e59ac8d89d126a299be60421171"},
-    {file = "numpy-1.23.0-cp310-cp310-win_amd64.whl", hash = "sha256:97a76604d9b0e79f59baeca16593c711fddb44936e40310f78bfef79ee9a835f"},
-    {file = "numpy-1.23.0-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:d8cc87bed09de55477dba9da370c1679bd534df9baa171dd01accbb09687dac3"},
-    {file = "numpy-1.23.0-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:f0f18804df7370571fb65db9b98bf1378172bd4e962482b857e612d1fec0f53e"},
-    {file = "numpy-1.23.0-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:ac86f407873b952679f5f9e6c0612687e51547af0e14ddea1eedfcb22466babd"},
-    {file = "numpy-1.23.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ae8adff4172692ce56233db04b7ce5792186f179c415c37d539c25de7298d25d"},
-    {file = "numpy-1.23.0-cp38-cp38-win32.whl", hash = "sha256:fe8b9683eb26d2c4d5db32cd29b38fdcf8381324ab48313b5b69088e0e355379"},
-    {file = "numpy-1.23.0-cp38-cp38-win_amd64.whl", hash = "sha256:5043bcd71fcc458dfb8a0fc5509bbc979da0131b9d08e3d5f50fb0bbb36f169a"},
-    {file = "numpy-1.23.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:1c29b44905af288b3919803aceb6ec7fec77406d8b08aaa2e8b9e63d0fe2f160"},
-    {file = "numpy-1.23.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:98e8e0d8d69ff4d3fa63e6c61e8cfe2d03c29b16b58dbef1f9baa175bbed7860"},
-    {file = "numpy-1.23.0-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:79a506cacf2be3a74ead5467aee97b81fca00c9c4c8b3ba16dbab488cd99ba10"},
-    {file = "numpy-1.23.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:092f5e6025813e64ad6d1b52b519165d08c730d099c114a9247c9bb635a2a450"},
-    {file = "numpy-1.23.0-cp39-cp39-win32.whl", hash = "sha256:d6ca8dabe696c2785d0c8c9b0d8a9b6e5fdbe4f922bde70d57fa1a2848134f95"},
-    {file = "numpy-1.23.0-cp39-cp39-win_amd64.whl", hash = "sha256:fc431493df245f3c627c0c05c2bd134535e7929dbe2e602b80e42bf52ff760bc"},
-    {file = "numpy-1.23.0-pp38-pypy38_pp73-macosx_10_9_x86_64.whl", hash = "sha256:f9c3fc2adf67762c9fe1849c859942d23f8d3e0bee7b5ed3d4a9c3eeb50a2f07"},
-    {file = "numpy-1.23.0-pp38-pypy38_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d0d2094e8f4d760500394d77b383a1b06d3663e8892cdf5df3c592f55f3bff66"},
-    {file = "numpy-1.23.0-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:94b170b4fa0168cd6be4becf37cb5b127bd12a795123984385b8cd4aca9857e5"},
-    {file = "numpy-1.23.0.tar.gz", hash = "sha256:bd3fa4fe2e38533d5336e1272fc4e765cabbbde144309ccee8675509d5cd7b05"},
-]
+numpy = []
 packaging = [
     {file = "packaging-21.3-py3-none-any.whl", hash = "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"},
     {file = "packaging-21.3.tar.gz", hash = "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb"},
@@ -645,23 +613,8 @@ pycparser = [
     {file = "pycparser-2.21-py2.py3-none-any.whl", hash = "sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9"},
     {file = "pycparser-2.21.tar.gz", hash = "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"},
 ]
-pyinstaller = [
-    {file = "pyinstaller-5.1-py3-none-macosx_10_13_universal2.whl", hash = "sha256:3c9bc373b4a4bf6d81b306b9918e290a3de582d7b50a0f6f4e837970a4db0c54"},
-    {file = "pyinstaller-5.1-py3-none-manylinux2014_aarch64.whl", hash = "sha256:ac003d49bbd62f6712b5631487049cee4f0a07445dd31c6d05e5724e33689fca"},
-    {file = "pyinstaller-5.1-py3-none-manylinux2014_i686.whl", hash = "sha256:f786cb013ebfd3fb23ddb46285902663e31256220b12b368f8c36e859a77ebc9"},
-    {file = "pyinstaller-5.1-py3-none-manylinux2014_ppc64le.whl", hash = "sha256:d8bfe5c32b4b5aaa91a5c1c7912fe3e5d13e7671f3468ee7742ec71ca192a975"},
-    {file = "pyinstaller-5.1-py3-none-manylinux2014_s390x.whl", hash = "sha256:c421b46ebf81ad4498de480640ce1a47ac15dfd3938dfc2e1c0846cb5cdb0c59"},
-    {file = "pyinstaller-5.1-py3-none-manylinux2014_x86_64.whl", hash = "sha256:588f2840c27a8a7e1b1fa361f107a1060c5096b36d3c94c243b23687ee41609d"},
-    {file = "pyinstaller-5.1-py3-none-musllinux_1_1_aarch64.whl", hash = "sha256:d3852c1f8fe6ca2f5c7942c845dc6d1f6140aa7860fe3500eac3ac88875d1dd4"},
-    {file = "pyinstaller-5.1-py3-none-musllinux_1_1_x86_64.whl", hash = "sha256:29b3f17d75ff58b12db7b0116df1b3382c8345aefd500a177987eaf0599dec03"},
-    {file = "pyinstaller-5.1-py3-none-win32.whl", hash = "sha256:a90ee3181c88aed0893bf537a50ad547655f5d555a5b731215a5fe1946d2f3db"},
-    {file = "pyinstaller-5.1-py3-none-win_amd64.whl", hash = "sha256:996e296d1dfe27c3e89efc26dbcc247f49c0801a9b5e22e2b39f5b983cf5c2f5"},
-    {file = "pyinstaller-5.1.tar.gz", hash = "sha256:9596c70c860cbce19537354db95b180351959b4cd14a70db6ab1d1432668c313"},
-]
-pyinstaller-hooks-contrib = [
-    {file = "pyinstaller-hooks-contrib-2022.7.tar.gz", hash = "sha256:6675634279cfe9e475580fb310c3d557037baefb065e6cb5a69a124361b926fd"},
-    {file = "pyinstaller_hooks_contrib-2022.7-py2.py3-none-any.whl", hash = "sha256:5fdb97dcae177955db7ab27840cba97b89dc0c7f4fd9142bba0f9b8d8df85c48"},
-]
+pyinstaller = []
+pyinstaller-hooks-contrib = []
 pyparsing = [
     {file = "pyparsing-3.0.9-py3-none-any.whl", hash = "sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"},
     {file = "pyparsing-3.0.9.tar.gz", hash = "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb"},
@@ -706,24 +659,5 @@ tomli = [
     {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
 ]
 yubikey-manager = []
-zipp = [
-    {file = "zipp-3.8.0-py3-none-any.whl", hash = "sha256:c4f6e5bbf48e74f7a38e7cc5b0480ff42b0ae5178957d564d18932525d5cf099"},
-    {file = "zipp-3.8.0.tar.gz", hash = "sha256:56bf8aadb83c24db6c4b577e13de374ccfb67da2078beba1d037c17980bf43ad"},
-]
-zxing-cpp = [
-    {file = "zxing-cpp-1.4.0.tar.gz", hash = "sha256:3d3ec36954ecbf9b0f633dab4b8cebcf0059d8a27f7a5969c4e41a308111af38"},
-    {file = "zxing_cpp-1.4.0-cp310-cp310-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:25b11d77cf6b9f7405af3ed6bacf4a6e0756ea74dfda7040ff53e7c58f352b05"},
-    {file = "zxing_cpp-1.4.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c1f849205237d4bda462d0a4b745e72494f825e5b6b06581e05b58d34d9869aa"},
-    {file = "zxing_cpp-1.4.0-cp310-cp310-win32.whl", hash = "sha256:76e9777d943af3c51b6406b323b3f28cbf9e40cc65b53cf847fda08295f18e48"},
-    {file = "zxing_cpp-1.4.0-cp310-cp310-win_amd64.whl", hash = "sha256:234d672e34e607ffc8e06639e79c8e1bf2ddb7c249134a6836569e92a2f2dd64"},
-    {file = "zxing_cpp-1.4.0-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:2c1f66c61e43163740c59c58880c3a8c41ebd2109573c0494f255c9c96134e8c"},
-    {file = "zxing_cpp-1.4.0-cp38-cp38-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:9418e1bd0775820a4933b60007b7f8a177e4ddd23692c1aaed2348fafc0a8e01"},
-    {file = "zxing_cpp-1.4.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8bc1e48ddfd6692d183782f091fbf54e5e1d36d0070822b1eab14cfb580b1625"},
-    {file = "zxing_cpp-1.4.0-cp38-cp38-win32.whl", hash = "sha256:4f340b6907780e8eb0e6473fec43ea145c4dd3275e3c21d6f887c0e28e114f29"},
-    {file = "zxing_cpp-1.4.0-cp38-cp38-win_amd64.whl", hash = "sha256:71772f81c4602133b2dba6a1107339ed965725001ce9a4caaf772598110351a1"},
-    {file = "zxing_cpp-1.4.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:331bec6b0ac8a9b339bc82956c52c022e7b2debfeb9102209483eb7538ed72d4"},
-    {file = "zxing_cpp-1.4.0-cp39-cp39-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:3b0844c6ad3c944452c980a025238ba3fbd3a414fd2c36e2bec1bc5bed03b21e"},
-    {file = "zxing_cpp-1.4.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:a770aff618cd00dda3922de2f7085c1f84bbe02f2b6df114d19054ad41c52fb0"},
-    {file = "zxing_cpp-1.4.0-cp39-cp39-win32.whl", hash = "sha256:ebe67de6a4d3c48a5ee52211ecf2003301ab39bd7d7b7dfa72ae80be429cfcf9"},
-    {file = "zxing_cpp-1.4.0-cp39-cp39-win_amd64.whl", hash = "sha256:d0e8b54b29497ed9238f31ce522ddb0189c0d6c4597787ef2eb823ca9fb42350"},
-]
+zipp = []
+zxing-cpp = []

l10n.yaml

@@ -0,0 +1,3 @@
+arb-dir: lib/l10n
+template-arb-file: app_en.arb
+output-localization-file: app_localizations.dart

lib/about_page.dart

@@ -3,17 +3,20 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:logging/logging.dart';
 import 'package:url_launcher/url_launcher.dart';
 
-import 'app/state.dart';
-import 'version.dart';
 import 'app/logging.dart';
 import 'app/message.dart';
+import 'app/state.dart';
 import 'core/state.dart';
+import 'android/state.dart';
 import 'desktop/state.dart';
+import 'version.dart';
 import 'widgets/responsive_dialog.dart';
+import 'widgets/choice_filter_chip.dart';
 
 final _log = Logger('about');
 
@@ -23,145 +26,177 @@ class AboutPage extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     return ResponsiveDialog(
-      title: const Text('About'),
-      child: Column(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          Image.asset('assets/graphics/app-icon.png', scale: 1 / 0.75),
-          Padding(
-            padding: const EdgeInsets.only(top: 24.0),
-            child: Text(
-              'Yubico Authenticator',
-              style: Theme.of(context).textTheme.titleMedium,
-            ),
-          ),
-          const Text(version),
-          const Text(''),
-          const Text('Copyright © 2022 Yubico'),
-          const Text('All rights reserved'),
-          const Text(''),
-          Row(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              TextButton(
-                child: const Text(
-                  'Terms of use',
-                  style: TextStyle(decoration: TextDecoration.underline),
-                ),
-                onPressed: () {
-                  launchUrl(
-                    Uri.parse(
-                        'https://www.yubico.com/support/terms-conditions/yubico-license-agreement/'),
-                    mode: LaunchMode.externalApplication,
-                  );
-                },
+      title: Text(AppLocalizations.of(context)!.general_about),
+      child: Padding(
+        padding: const EdgeInsets.symmetric(vertical: 32),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Image.asset('assets/graphics/app-icon.png', scale: 1 / 0.75),
+            Padding(
+              padding: const EdgeInsets.only(top: 24.0),
+              child: Text(
+                'Yubico Authenticator',
+                style: Theme.of(context).textTheme.titleMedium,
               ),
-              TextButton(
-                child: const Text(
-                  'Privacy policy',
-                  style: TextStyle(decoration: TextDecoration.underline),
-                ),
-                onPressed: () {
-                  launchUrl(
-                    Uri.parse(
-                        'https://www.yubico.com/support/terms-conditions/privacy-notice/'),
-                    mode: LaunchMode.externalApplication,
-                  );
-                },
-              ),
-            ],
-          ),
-          TextButton(
-            child: const Text(
-              'Open source licenses',
-              style: TextStyle(decoration: TextDecoration.underline),
             ),
-            onPressed: () {
-              Navigator.of(context).push(MaterialPageRoute<void>(
-                builder: (BuildContext context) => const LicensePage(
-                  applicationVersion: version,
-                ),
-                settings: const RouteSettings(name: 'licenses'),
-              ));
-            },
-          ),
-          const Padding(
-            padding: EdgeInsets.only(top: 24.0, bottom: 8.0),
-            child: Divider(),
-          ),
-          Padding(
-            padding: const EdgeInsets.symmetric(vertical: 16.0),
-            child: Text(
-              'Help and feedback',
-              style: Theme.of(context).textTheme.titleMedium,
-            ),
-          ),
-          Row(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              TextButton(
-                child: const Text(
-                  'Send us feedback',
-                  style: TextStyle(decoration: TextDecoration.underline),
-                ),
-                onPressed: () {
-                  launchUrl(
-                    Uri.parse('https://forms.gle/nYPVWcFnqoprZX1S9'),
-                    mode: LaunchMode.externalApplication,
-                  );
-                },
-              ),
-              TextButton(
-                child: const Text(
-                  'I need help',
-                  style: TextStyle(decoration: TextDecoration.underline),
-                ),
-                onPressed: () {
-                  launchUrl(
-                    Uri.parse('https://support.yubico.com/support/home'),
-                    mode: LaunchMode.externalApplication,
-                  );
-                },
-              ),
-            ],
-          ),
-          const Padding(
-            padding: EdgeInsets.only(top: 24.0, bottom: 8.0),
-            child: Divider(),
-          ),
-          Padding(
-            padding: const EdgeInsets.symmetric(vertical: 16.0),
-            child: Text(
-              'Troubleshooting',
-              style: Theme.of(context).textTheme.titleMedium,
-            ),
-          ),
-          const LoggingPanel(),
-          if (isDesktop) ...[
-            const SizedBox(height: 12.0),
-            OutlinedButton.icon(
-              icon: const Icon(Icons.bug_report_outlined),
-              label: const Text('Run diagnostics'),
-              onPressed: () async {
-                _log.info('Running diagnostics...');
-                final response =
-                    await ref.read(rpcProvider).command('diagnose', []);
-                final data = response['diagnostics'] as List;
-                data.insert(0, {
-                  'app_version': version,
-                  'dart': Platform.version,
-                });
-                final text = const JsonEncoder.withIndent('  ').convert(data);
-                await Clipboard.setData(ClipboardData(text: text));
-                await ref.read(withContextProvider)(
-                  (context) async {
-                    showMessage(context, 'Diagnostic data copied to clipboard');
+            const Text(version),
+            const Text(''),
+            const Text('Copyright © 2022 Yubico'),
+            const Text('All rights reserved'),
+            const Text(''),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                TextButton(
+                  child: Text(
+                    AppLocalizations.of(context)!.general_terms_of_use,
+                    style:
+                        const TextStyle(decoration: TextDecoration.underline),
+                  ),
+                  onPressed: () {
+                    launchUrl(
+                      Uri.parse(
+                          'https://www.yubico.com/support/terms-conditions/yubico-license-agreement/'),
+                      mode: LaunchMode.externalApplication,
+                    );
                   },
-                );
+                ),
+                TextButton(
+                  child: Text(
+                    AppLocalizations.of(context)!.general_privacy_policy,
+                    style:
+                        const TextStyle(decoration: TextDecoration.underline),
+                  ),
+                  onPressed: () {
+                    launchUrl(
+                      Uri.parse(
+                          'https://www.yubico.com/support/terms-conditions/privacy-notice/'),
+                      mode: LaunchMode.externalApplication,
+                    );
+                  },
+                ),
+              ],
+            ),
+            TextButton(
+              child: Text(
+                AppLocalizations.of(context)!.general_open_src_licenses,
+                style: const TextStyle(decoration: TextDecoration.underline),
+              ),
+              onPressed: () {
+                Navigator.of(context).push(MaterialPageRoute<void>(
+                  builder: (BuildContext context) => const LicensePage(
+                    applicationVersion: version,
+                  ),
+                  settings: const RouteSettings(name: 'licenses'),
+                ));
               },
             ),
-          ]
-        ],
+            const Padding(
+              padding: EdgeInsets.only(top: 24.0, bottom: 8.0),
+              child: Divider(),
+            ),
+            Padding(
+              padding: const EdgeInsets.symmetric(vertical: 16.0),
+              child: Text(
+                AppLocalizations.of(context)!.general_help_and_feedback,
+                style: Theme.of(context).textTheme.titleMedium,
+              ),
+            ),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                TextButton(
+                  child: Text(
+                    AppLocalizations.of(context)!.general_send_feedback,
+                    style:
+                        const TextStyle(decoration: TextDecoration.underline),
+                  ),
+                  onPressed: () {
+                    launchUrl(
+                      Platform.isAndroid
+                          // Android Beta feedback form
+                          ? Uri.parse('https://forms.gle/2J81Kh8rnzBrtNc69')
+                          // Desktop Beta feedback form
+                          : Uri.parse('https://forms.gle/nYPVWcFnqoprZX1S9'),
+                      mode: LaunchMode.externalApplication,
+                    );
+                  },
+                ),
+                TextButton(
+                  child: Text(
+                    AppLocalizations.of(context)!.general_i_need_help,
+                    style:
+                        const TextStyle(decoration: TextDecoration.underline),
+                  ),
+                  onPressed: () {
+                    launchUrl(
+                      Uri.parse('https://support.yubico.com/support/home'),
+                      mode: LaunchMode.externalApplication,
+                    );
+                  },
+                ),
+              ],
+            ),
+            const Padding(
+              padding: EdgeInsets.only(top: 24.0, bottom: 8.0),
+              child: Divider(),
+            ),
+            Padding(
+              padding: const EdgeInsets.symmetric(vertical: 16.0),
+              child: Text(
+                AppLocalizations.of(context)!.general_troubleshooting,
+                style: Theme.of(context).textTheme.titleMedium,
+              ),
+            ),
+            const LoggingPanel(),
+
+            // Diagnostics (desktop only)
+            if (isDesktop) ...[
+              const SizedBox(height: 12.0),
+              ActionChip(
+                avatar: const Icon(Icons.bug_report_outlined),
+                label:
+                    Text(AppLocalizations.of(context)!.general_run_diagnostics),
+                onPressed: () async {
+                  _log.info('Running diagnostics...');
+                  final response =
+                      await ref.read(rpcProvider).command('diagnose', []);
+                  final data = response['diagnostics'] as List;
+                  data.insert(0, {
+                    'app_version': version,
+                    'dart': Platform.version,
+                  });
+                  final text = const JsonEncoder.withIndent('  ').convert(data);
+                  await Clipboard.setData(ClipboardData(text: text));
+                  await ref.read(withContextProvider)(
+                    (context) async {
+                      showMessage(
+                          context,
+                          AppLocalizations.of(context)!
+                              .general_diagnostics_copied);
+                    },
+                  );
+                },
+              ),
+            ],
+
+            // Enable screenshots (Android only)
+            if (isAndroid) ...[
+              const SizedBox(height: 12.0),
+              FilterChip(
+                label: Text(
+                    AppLocalizations.of(context)!.general_allow_screenshots),
+                selected: ref.watch(androidAllowScreenshotsProvider),
+                onSelected: (value) async {
+                  ref
+                      .read(androidAllowScreenshotsProvider.notifier)
+                      .setAllowScreenshots(value);
+                },
+              ),
+            ],
+          ],
+        ),
       ),
     );
   }
@@ -172,38 +207,40 @@ class LoggingPanel extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    return Column(
+    final logLevel = ref.watch(logLevelProvider);
+    return Wrap(
+      alignment: WrapAlignment.center,
+      spacing: 4.0,
+      runSpacing: 8.0,
       children: [
-        const SizedBox(height: 12.0),
-        DropdownButtonFormField<Level>(
-          decoration: const InputDecoration(
-            labelText: 'Log level',
-            border: OutlineInputBorder(),
+        ChoiceFilterChip<Level>(
+          avatar: Icon(
+            Icons.insights,
+            color: Theme.of(context).colorScheme.primary,
           ),
-          value: ref.watch(logLevelProvider),
-          items: Levels.LEVELS
-              .map((e) => DropdownMenuItem(
-                    value: e,
-                    child: Text(e.name.toUpperCase()),
-                  ))
-              .toList(),
+          value: logLevel,
+          items: Levels.LEVELS,
+          selected: logLevel != Level.INFO,
+          labelBuilder: (value) => Text(
+              '${AppLocalizations.of(context)!.general_log_level}: ${value.name[0]}${value.name.substring(1).toLowerCase()}'),
+          itemBuilder: (value) =>
+              Text('${value.name[0]}${value.name.substring(1).toLowerCase()}'),
           onChanged: (level) {
-            ref.read(logLevelProvider.notifier).setLogLevel(level!);
+            ref.read(logLevelProvider.notifier).setLogLevel(level);
             _log.debug('Log level set to $level');
-            showMessage(context, 'Log level set to $level');
           },
         ),
-        const SizedBox(height: 12.0),
-        OutlinedButton.icon(
-          icon: const Icon(Icons.copy),
-          label: const Text('Copy log to clipboard'),
+        ActionChip(
+          avatar: const Icon(Icons.copy),
+          label: Text(AppLocalizations.of(context)!.general_copy_log),
           onPressed: () async {
             _log.info('Copying log to clipboard ($version)...');
             final logs = await ref.read(logLevelProvider.notifier).getLogs();
             await Clipboard.setData(ClipboardData(text: logs.join('\n')));
             await ref.read(withContextProvider)(
               (context) async {
-                showMessage(context, 'Log copied to clipboard');
+                showMessage(
+                    context, AppLocalizations.of(context)!.general_log_copied);
               },
             );
           },

lib/android/api/flutter_management_api_impl.dart

@@ -1,15 +0,0 @@
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-
-import '../command_providers.dart';
-import 'impl.dart';
-
-class FManagementApiImpl extends FManagementApi {
-  final StateNotifierProviderRef _ref;
-
-  FManagementApiImpl(this._ref) : super();
-
-  @override
-  Future<void> updateDeviceInfo(String deviceInfoJson) async {
-    _ref.read(androidYubikeyProvider.notifier).setFromString(deviceInfoJson);
-  }
-}

lib/android/api/flutter_oath_api_impl.dart

@@ -1,22 +0,0 @@
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-
-import '../oath/command_providers.dart';
-import 'impl.dart';
-
-class FOathApiImpl extends FOathApi {
-  final StateNotifierProviderRef _ref;
-
-  FOathApiImpl(this._ref) : super();
-
-  @override
-  Future<void> updateOathCredentials(String credentialListJson) async {
-    _ref
-        .read(androidCredentialsProvider.notifier)
-        .setFromString(credentialListJson);
-  }
-
-  @override
-  Future<void> updateSession(String sessionJson) async {
-    _ref.read(androidStateProvider.notifier).setFromString(sessionJson);
-  }
-}

lib/android/api/impl.dart

@@ -1,501 +0,0 @@
-// Autogenerated from Pigeon (v3.1.6), do not edit directly.
-// See also: https://pub.dev/packages/pigeon
-// ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, prefer_null_aware_operators, omit_local_variable_types, unused_shown_name
-// @dart = 2.12
-import 'dart:async';
-import 'dart:typed_data' show Uint8List, Int32List, Int64List, Float64List;
-
-import 'package:flutter/foundation.dart' show WriteBuffer, ReadBuffer;
-import 'package:flutter/services.dart';
-
-class UnlockResponse {
-  UnlockResponse({
-    this.isUnlocked,
-    this.isRemembered,
-  });
-
-  bool? isUnlocked;
-  bool? isRemembered;
-
-  Object encode() {
-    final Map<Object?, Object?> pigeonMap = <Object?, Object?>{};
-    pigeonMap['isUnlocked'] = isUnlocked;
-    pigeonMap['isRemembered'] = isRemembered;
-    return pigeonMap;
-  }
-
-  static UnlockResponse decode(Object message) {
-    final Map<Object?, Object?> pigeonMap = message as Map<Object?, Object?>;
-    return UnlockResponse(
-      isUnlocked: pigeonMap['isUnlocked'] as bool?,
-      isRemembered: pigeonMap['isRemembered'] as bool?,
-    );
-  }
-}
-
-class _OathApiCodec extends StandardMessageCodec {
-  const _OathApiCodec();
-  @override
-  void writeValue(WriteBuffer buffer, Object? value) {
-    if (value is UnlockResponse) {
-      buffer.putUint8(128);
-      writeValue(buffer, value.encode());
-    } else 
-{
-      super.writeValue(buffer, value);
-    }
-  }
-  @override
-  Object? readValueOfType(int type, ReadBuffer buffer) {
-    switch (type) {
-      case 128:       
-        return UnlockResponse.decode(readValue(buffer)!);
-      
-      default:      
-        return super.readValueOfType(type, buffer);
-      
-    }
-  }
-}
-
-class OathApi {
-  /// Constructor for [OathApi].  The [binaryMessenger] named argument is
-  /// available for dependency injection.  If it is left null, the default
-  /// BinaryMessenger will be used which routes to the host platform.
-  OathApi({BinaryMessenger? binaryMessenger}) : _binaryMessenger = binaryMessenger;
-
-  final BinaryMessenger? _binaryMessenger;
-
-  static const MessageCodec<Object?> codec = _OathApiCodec();
-
-  Future<void> reset() async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.reset', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(null) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-
-  Future<UnlockResponse> unlock(String arg_password, bool arg_remember) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.unlock', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_password, arg_remember]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else if (replyMap['result'] == null) {
-      throw PlatformException(
-        code: 'null-error',
-        message: 'Host platform returned null value for non-null return value.',
-      );
-    } else {
-      return (replyMap['result'] as UnlockResponse?)!;
-    }
-  }
-
-  Future<void> setPassword(String? arg_currentPassword, String arg_newPassword) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.setPassword', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_currentPassword, arg_newPassword]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-
-  Future<void> unsetPassword(String arg_currentPassword) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.unsetPassword', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_currentPassword]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-
-  Future<void> forgetPassword() async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.forgetPassword', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(null) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-
-  Future<String> addAccount(String arg_uri, bool arg_requireTouch) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.addAccount', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_uri, arg_requireTouch]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else if (replyMap['result'] == null) {
-      throw PlatformException(
-        code: 'null-error',
-        message: 'Host platform returned null value for non-null return value.',
-      );
-    } else {
-      return (replyMap['result'] as String?)!;
-    }
-  }
-
-  Future<String> renameAccount(String arg_uri, String arg_name, String? arg_issuer) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.renameAccount', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_uri, arg_name, arg_issuer]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else if (replyMap['result'] == null) {
-      throw PlatformException(
-        code: 'null-error',
-        message: 'Host platform returned null value for non-null return value.',
-      );
-    } else {
-      return (replyMap['result'] as String?)!;
-    }
-  }
-
-  Future<void> deleteAccount(String arg_uri) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.deleteAccount', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_uri]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-
-  Future<String> refreshCodes() async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.refreshCodes', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(null) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else if (replyMap['result'] == null) {
-      throw PlatformException(
-        code: 'null-error',
-        message: 'Host platform returned null value for non-null return value.',
-      );
-    } else {
-      return (replyMap['result'] as String?)!;
-    }
-  }
-
-  Future<String> calculate(String arg_uri) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.OathApi.calculate', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_uri]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else if (replyMap['result'] == null) {
-      throw PlatformException(
-        code: 'null-error',
-        message: 'Host platform returned null value for non-null return value.',
-      );
-    } else {
-      return (replyMap['result'] as String?)!;
-    }
-  }
-}
-
-class _AppApiCodec extends StandardMessageCodec {
-  const _AppApiCodec();
-}
-
-class AppApi {
-  /// Constructor for [AppApi].  The [binaryMessenger] named argument is
-  /// available for dependency injection.  If it is left null, the default
-  /// BinaryMessenger will be used which routes to the host platform.
-  AppApi({BinaryMessenger? binaryMessenger}) : _binaryMessenger = binaryMessenger;
-
-  final BinaryMessenger? _binaryMessenger;
-
-  static const MessageCodec<Object?> codec = _AppApiCodec();
-
-  Future<void> setContext(int arg_subPageIndex) async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.AppApi.setContext', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(<Object?>[arg_subPageIndex]) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-}
-
-class _FOathApiCodec extends StandardMessageCodec {
-  const _FOathApiCodec();
-}
-abstract class FOathApi {
-  static const MessageCodec<Object?> codec = _FOathApiCodec();
-
-  Future<void> updateSession(String sessionJson);
-  Future<void> updateOathCredentials(String credentialListJson);
-  static void setup(FOathApi? api, {BinaryMessenger? binaryMessenger}) {
-    {
-      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.FOathApi.updateSession', codec, binaryMessenger: binaryMessenger);
-      if (api == null) {
-        channel.setMessageHandler(null);
-      } else {
-        channel.setMessageHandler((Object? message) async {
-          assert(message != null, 'Argument for dev.flutter.pigeon.FOathApi.updateSession was null.');
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_sessionJson = (args[0] as String?);
-          assert(arg_sessionJson != null, 'Argument for dev.flutter.pigeon.FOathApi.updateSession was null, expected non-null String.');
-          await api.updateSession(arg_sessionJson!);
-          return;
-        });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.FOathApi.updateOathCredentials', codec, binaryMessenger: binaryMessenger);
-      if (api == null) {
-        channel.setMessageHandler(null);
-      } else {
-        channel.setMessageHandler((Object? message) async {
-          assert(message != null, 'Argument for dev.flutter.pigeon.FOathApi.updateOathCredentials was null.');
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_credentialListJson = (args[0] as String?);
-          assert(arg_credentialListJson != null, 'Argument for dev.flutter.pigeon.FOathApi.updateOathCredentials was null, expected non-null String.');
-          await api.updateOathCredentials(arg_credentialListJson!);
-          return;
-        });
-      }
-    }
-  }
-}
-
-class _FManagementApiCodec extends StandardMessageCodec {
-  const _FManagementApiCodec();
-}
-abstract class FManagementApi {
-  static const MessageCodec<Object?> codec = _FManagementApiCodec();
-
-  Future<void> updateDeviceInfo(String deviceInfoJson);
-  static void setup(FManagementApi? api, {BinaryMessenger? binaryMessenger}) {
-    {
-      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.FManagementApi.updateDeviceInfo', codec, binaryMessenger: binaryMessenger);
-      if (api == null) {
-        channel.setMessageHandler(null);
-      } else {
-        channel.setMessageHandler((Object? message) async {
-          assert(message != null, 'Argument for dev.flutter.pigeon.FManagementApi.updateDeviceInfo was null.');
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_deviceInfoJson = (args[0] as String?);
-          assert(arg_deviceInfoJson != null, 'Argument for dev.flutter.pigeon.FManagementApi.updateDeviceInfo was null, expected non-null String.');
-          await api.updateDeviceInfo(arg_deviceInfoJson!);
-          return;
-        });
-      }
-    }
-  }
-}
-
-class _FDialogApiCodec extends StandardMessageCodec {
-  const _FDialogApiCodec();
-}
-abstract class FDialogApi {
-  static const MessageCodec<Object?> codec = _FDialogApiCodec();
-
-  Future<void> showDialogApi(String dialogMessage);
-  Future<void> closeDialogApi();
-  static void setup(FDialogApi? api, {BinaryMessenger? binaryMessenger}) {
-    {
-      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.FDialogApi.showDialogApi', codec, binaryMessenger: binaryMessenger);
-      if (api == null) {
-        channel.setMessageHandler(null);
-      } else {
-        channel.setMessageHandler((Object? message) async {
-          assert(message != null, 'Argument for dev.flutter.pigeon.FDialogApi.showDialogApi was null.');
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_dialogMessage = (args[0] as String?);
-          assert(arg_dialogMessage != null, 'Argument for dev.flutter.pigeon.FDialogApi.showDialogApi was null, expected non-null String.');
-          await api.showDialogApi(arg_dialogMessage!);
-          return;
-        });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.FDialogApi.closeDialogApi', codec, binaryMessenger: binaryMessenger);
-      if (api == null) {
-        channel.setMessageHandler(null);
-      } else {
-        channel.setMessageHandler((Object? message) async {
-          // ignore message
-          await api.closeDialogApi();
-          return;
-        });
-      }
-    }
-  }
-}
-
-class _HDialogApiCodec extends StandardMessageCodec {
-  const _HDialogApiCodec();
-}
-
-class HDialogApi {
-  /// Constructor for [HDialogApi].  The [binaryMessenger] named argument is
-  /// available for dependency injection.  If it is left null, the default
-  /// BinaryMessenger will be used which routes to the host platform.
-  HDialogApi({BinaryMessenger? binaryMessenger}) : _binaryMessenger = binaryMessenger;
-
-  final BinaryMessenger? _binaryMessenger;
-
-  static const MessageCodec<Object?> codec = _HDialogApiCodec();
-
-  Future<void> dialogClosed() async {
-    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.HDialogApi.dialogClosed', codec, binaryMessenger: _binaryMessenger);
-    final Map<Object?, Object?>? replyMap =
-        await channel.send(null) as Map<Object?, Object?>?;
-    if (replyMap == null) {
-      throw PlatformException(
-        code: 'channel-error',
-        message: 'Unable to establish connection on channel.',
-      );
-    } else if (replyMap['error'] != null) {
-      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
-      throw PlatformException(
-        code: (error['code'] as String?)!,
-        message: error['message'] as String?,
-        details: error['details'],
-      );
-    } else {
-      return;
-    }
-  }
-}

lib/android/command_providers.dart

@@ -1,65 +0,0 @@
-import 'dart:convert';
-
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:logging/logging.dart';
-import 'package:yubico_authenticator/android/oath/command_providers.dart';
-import 'package:yubico_authenticator/app/logging.dart';
-
-import '../app/models.dart';
-import '../core/models.dart';
-import '../management/models.dart';
-
-final _log = Logger('yubikeyDataCommandProvider');
-
-final androidYubikeyProvider =
-    StateNotifierProvider<_YubikeyProvider, AsyncValue<YubiKeyData>>((ref) {
-  return _YubikeyProvider(const AsyncValue.loading(), ref);
-});
-
-class _YubikeyProvider extends StateNotifier<AsyncValue<YubiKeyData>> {
-  final Ref _ref;
-  _YubikeyProvider(super.yubiKeyData, this._ref);
-
-  void setFromString(String input) {
-    try {
-      if (input.isEmpty) {
-        _log.debug('Yubikey was detached.');
-        state = const AsyncValue.loading();
-
-        // reset other providers when YubiKey is removed
-        _ref.refresh(androidStateProvider);
-        _ref.refresh(androidCredentialsProvider);
-        return;
-      }
-
-      var args = jsonDecode(input);
-
-      DeviceInfo deviceInfo = DeviceInfo.fromJson(args);
-      String name = args['name'];
-      bool isNfc = args['is_nfc'];
-      int? usbPid = args['usb_pid'];
-
-      DeviceNode deviceNode = isNfc
-          ? DeviceNode.nfcReader(DevicePath([]), name)
-          : DeviceNode.usbYubiKey(
-              DevicePath([]),
-              name,
-              usbPid != null ? UsbPid.fromValue(usbPid) : UsbPid.yk4OtpFidoCcid,
-              deviceInfo);
-
-      // reset oath providers on key change
-      var yubiKeyData = YubiKeyData(deviceNode, name, deviceInfo);
-      state.whenData((data) {
-        if (data != yubiKeyData) {
-          _ref.refresh(androidStateProvider);
-          _ref.refresh(androidCredentialsProvider);
-        }
-      });
-
-      state = AsyncValue.data(yubiKeyData);
-    } on Exception catch (e) {
-      _log.debug('Invalid data for yubikey: $input. $e');
-      state = AsyncValue.error(e);
-    }
-  }
-}

lib/android/devices.dart

@@ -0,0 +1,59 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:logging/logging.dart';
+
+import '../app/logging.dart';
+import '../app/models.dart';
+import '../core/models.dart';
+import '../management/models.dart';
+
+final _log = Logger('android.devices');
+
+final androidYubikeyProvider =
+    StateNotifierProvider<_YubikeyProvider, AsyncValue<YubiKeyData>>((ref) {
+  return _YubikeyProvider();
+});
+
+class _YubikeyProvider extends StateNotifier<AsyncValue<YubiKeyData>> {
+  final _events = const EventChannel('android.devices.deviceInfo');
+  late StreamSubscription sub;
+  _YubikeyProvider() : super(const AsyncValue.loading()) {
+    sub = _events.receiveBroadcastStream().listen((event) {
+      _setDevice(jsonDecode(event));
+    });
+  }
+
+  @override
+  void dispose() {
+    sub.cancel();
+    super.dispose();
+  }
+
+  Future<void> _setDevice(Map<String, dynamic>? json) async {
+    if (json == null) {
+      _log.debug('Yubikey was detached.');
+      state = const AsyncValue.loading();
+      return;
+    }
+
+    state = await AsyncValue.guard(() async {
+      DeviceInfo deviceInfo = DeviceInfo.fromJson(json);
+      String name = json['name'];
+      bool isNfc = json['is_nfc'];
+      int? usbPid = json['usb_pid'];
+
+      DeviceNode deviceNode = isNfc
+          ? DeviceNode.nfcReader(DevicePath([]), name)
+          : DeviceNode.usbYubiKey(
+              DevicePath([]),
+              name,
+              usbPid != null ? UsbPid.fromValue(usbPid) : UsbPid.yk4OtpFidoCcid,
+              deviceInfo);
+
+      return YubiKeyData(deviceNode, name, deviceInfo);
+    });
+  }
+}

lib/android/init.dart

@@ -1,11 +1,14 @@
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:logging/logging.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:yubico_authenticator/android/logger.dart';
+import 'package:yubico_authenticator/android/views/beta_dialog.dart';
 import 'package:yubico_authenticator/android/window_state_provider.dart';
 import 'package:yubico_authenticator/app/logging.dart';
 
@@ -16,18 +19,19 @@ import '../app/views/main_page.dart';
 import '../core/state.dart';
 import '../management/state.dart';
 import '../oath/state.dart';
-import 'api/impl.dart';
 import 'management/state.dart';
 import 'oath/state.dart';
 import 'qr_scanner/qr_scanner_provider.dart';
 import 'state.dart';
-import 'views/tap_request_dialog.dart';
+import 'tap_request_dialog.dart';
 
 Future<Widget> initialize() async {
   if (kDebugMode) {
     Logger.root.level = Levels.DEBUG;
   }
 
+  _initLicenses();
+
   return ProviderScope(
     overrides: [
       supportedAppsProvider.overrideWithValue([
@@ -47,18 +51,85 @@ Future<Widget> initialize() async {
       qrScannerProvider.overrideWithProvider(androidQrScannerProvider),
       windowStateProvider.overrideWithProvider(androidWindowStateProvider)
     ],
-    child: YubicoAuthenticatorApp(page: Consumer(
-      builder: (context, ref, child) {
-        // activates the sub page provider
-        ref.read(androidSubPageProvider);
+    child: DismissKeyboard(
+      child: YubicoAuthenticatorApp(page: Consumer(
+        builder: (context, ref, child) {
+          // activates the sub page provider
+          ref.read(androidSubPageProvider);
 
-        // activates window state provider
-        ref.read(androidWindowStateProvider);
+          // activates window state provider
+          ref.read(androidWindowStateProvider);
 
-        /// initializes global handler for dialogs
-        FDialogApi.setup(FDialogApiImpl(ref.watch(withContextProvider)));
-        return const MainPage();
-      },
-    )),
+          /// initializes global handler for dialogs
+          ref.read(androidDialogProvider);
+
+          var betaDialog = BetaDialog(context, ref);
+          betaDialog.request();
+
+          return const MainPage();
+        },
+      )),
+    ),
   );
 }
+
+class DismissKeyboard extends StatelessWidget {
+  final Widget child;
+
+  const DismissKeyboard({super.key, required this.child});
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: () {
+        // De-select any selected node when tapping outside.
+        FocusScopeNode currentFocus = FocusScope.of(context);
+        if (!currentFocus.hasPrimaryFocus &&
+            currentFocus.focusedChild != null) {
+          FocusManager.instance.primaryFocus?.unfocus();
+        }
+      },
+      child: child,
+    );
+  }
+}
+
+void _initLicenses() async {
+
+  const licenseDir = 'assets/licenses/android';
+
+  final androidProjectsToLicenseUrl = await rootBundle.loadStructuredData<List>(
+    '$licenseDir/android.json',
+    (value) async => jsonDecode(value),
+  );
+
+  // mapping from url to license text
+  final fileMap = await rootBundle.loadStructuredData<Map>(
+    '$licenseDir/map.json',
+        (value) async => jsonDecode(value),
+  );
+
+  final urlToLicense = <String, String>{};
+  fileMap.forEach((url, file) async {
+    String licenseText = url;
+    try {
+      licenseText = await rootBundle.loadString('$licenseDir/$file');
+      urlToLicense[url] = licenseText;
+    } catch (_) {
+      // failed to read license file, will use the url
+    }
+  });
+
+  if (androidProjectsToLicenseUrl.isNotEmpty) {
+    LicenseRegistry.addLicense(() async* {
+      for (final e in androidProjectsToLicenseUrl) {
+        var licenseUrl = e['PackageLicense'];
+        var content = licenseUrl;
+        if (urlToLicense.containsKey(licenseUrl)) {
+          content = '${urlToLicense[licenseUrl]}\n\n$licenseUrl\n\n';
+        }
+        yield LicenseEntryWithLineBreaks([e['PackageName']], content);
+      }
+    });
+  }
+}

lib/android/logger.dart

@@ -36,11 +36,18 @@ class AndroidLogger extends LogLevelNotifier {
   }
 
   void log(LogRecord record) {
+    final error = record.error == null
+        ? null
+        : record.error is Exception
+            ? record.error.toString()
+            : record.error is String
+                ? record.error
+                : 'Invalid error type: ${record.error.runtimeType.toString()}';
     _channel.invokeMethod('log', {
       'loggerName': record.loggerName,
       'level': record.level.name,
       'message': record.message,
-      'error': record.error
+      'error': error
     });
   }
 }

lib/android/oath/command_providers.dart

@@ -1,38 +0,0 @@
-import 'dart:convert';
-
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-
-import '../../oath/models.dart';
-
-final androidStateProvider =
-    StateNotifierProvider<_StateProvider, OathState?>((ref) {
-  return _StateProvider(null);
-});
-
-class _StateProvider extends StateNotifier<OathState?> {
-  _StateProvider(super.oathState);
-
-  void setFromString(String input) {
-    var resultJson = jsonDecode(input);
-    state = OathState.fromJson(resultJson);
-  }
-}
-
-final androidCredentialsProvider =
-    StateNotifierProvider<_CredentialsProvider, List<OathPair>?>((ref) {
-  return _CredentialsProvider(null);
-});
-
-class _CredentialsProvider extends StateNotifier<List<OathPair>?> {
-  _CredentialsProvider(super.credentials);
-
-  void setFromString(String input) {
-    var result = jsonDecode(input);
-
-    if (result is List) {
-      state = result.map((e) => OathPair.fromJson(e)).toList();
-    } else {
-      state = [];
-    }
-  }
-}

lib/android/oath/state.dart

@@ -1,50 +1,57 @@
 import 'dart:async';
 import 'dart:convert';
-import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:logging/logging.dart';
-import 'package:yubico_authenticator/android/api/impl.dart';
-import 'package:yubico_authenticator/app/logging.dart';
-import 'package:yubico_authenticator/app/models.dart';
-import 'package:yubico_authenticator/app/state.dart';
-import 'package:yubico_authenticator/core/models.dart';
-import 'package:yubico_authenticator/oath/state.dart';
 
+import '../../app/logging.dart';
+import '../../app/models.dart';
+import '../../app/state.dart';
+import '../../app/views/user_interaction.dart';
+import '../../cancellation_exception.dart';
+import '../../core/models.dart';
 import '../../oath/models.dart';
-import 'command_providers.dart';
+import '../../oath/state.dart';
 
 final _log = Logger('android.oath.state');
 
-class CancelException implements Exception {}
-
-final oathApiProvider = StateProvider((_) => OathApi());
+const _methods = MethodChannel('android.oath.methods');
 
 final androidOathStateProvider = StateNotifierProvider.autoDispose
     .family<OathStateNotifier, AsyncValue<OathState>, DevicePath>(
-        (ref, devicePath) => _AndroidOathStateNotifier(
-            ref.watch(androidStateProvider), ref.watch(oathApiProvider), ref));
+        (ref, devicePath) => _AndroidOathStateNotifier());
 
 class _AndroidOathStateNotifier extends OathStateNotifier {
-  final OathApi _api;
-  final Ref _ref;
+  final _events = const EventChannel('android.oath.sessionState');
+  late StreamSubscription _sub;
+  _AndroidOathStateNotifier() : super() {
+    _sub = _events.receiveBroadcastStream().listen((event) {
+      final json = jsonDecode(event);
+      if (mounted) {
+        if (json == null) {
+          state = const AsyncValue.loading();
+        } else {
+          final oathState = OathState.fromJson(json);
+          state = AsyncValue.data(oathState);
+        }
+      }
+    }, onError: (err, stackTrace) {
+      state = AsyncValue.error(err, stackTrace: stackTrace);
+    });
+  }
 
-  _AndroidOathStateNotifier(OathState? newState, this._api, this._ref)
-      : super() {
-    if (newState != null) {
-      setData(newState);
-    }
+  @override
+  void dispose() {
+    _sub.cancel();
+    super.dispose();
   }
 
   @override
   Future<void> reset() async {
     try {
-      await _api.reset();
-      setData(state.value!
-          .copyWith(locked: false, remembered: false, hasKey: false));
-      _ref.refresh(androidStateProvider);
+      await _methods.invokeMethod('reset');
     } catch (e) {
       _log.debug('Calling reset failed with exception: $e');
     }
@@ -54,18 +61,13 @@ class _AndroidOathStateNotifier extends OathStateNotifier {
   Future<Pair<bool, bool>> unlock(String password,
       {bool remember = false}) async {
     try {
-      final unlockResponse = await _api.unlock(password, remember);
+      final unlockResponse = jsonDecode(await _methods.invokeMethod(
+          'unlock', {'password': password, 'remember': remember}));
+      _log.debug('applet unlocked');
 
-      final unlocked = unlockResponse.isUnlocked == true;
-      final remembered = unlockResponse.isRemembered == true;
+      final unlocked = unlockResponse['unlocked'] == true;
+      final remembered = unlockResponse['remembered'] == true;
 
-      if (unlocked) {
-        _log.debug('applet unlocked');
-        setData(state.value!.copyWith(
-          locked: false,
-          remembered: remembered,
-        ));
-      }
       return Pair(unlocked, remembered);
     } on PlatformException catch (e) {
       _log.debug('Calling unlock failed with exception: $e');
@@ -76,8 +78,8 @@ class _AndroidOathStateNotifier extends OathStateNotifier {
   @override
   Future<bool> setPassword(String? current, String password) async {
     try {
-      await _api.setPassword(current, password);
-      setData(state.value!.copyWith(hasKey: true));
+      await _methods.invokeMethod(
+          'setPassword', {'current': current, 'password': password});
       return true;
     } on PlatformException catch (e) {
       _log.debug('Calling set password failed with exception: $e');
@@ -88,8 +90,7 @@ class _AndroidOathStateNotifier extends OathStateNotifier {
   @override
   Future<bool> unsetPassword(String current) async {
     try {
-      await _api.unsetPassword(current);
-      setData(state.value!.copyWith(hasKey: false, locked: false));
+      await _methods.invokeMethod('unsetPassword', {'current': current});
       return true;
     } on PlatformException catch (e) {
       _log.debug('Calling unset password failed with exception: $e');
@@ -100,8 +101,7 @@ class _AndroidOathStateNotifier extends OathStateNotifier {
   @override
   Future<void> forgetPassword() async {
     try {
-      await _api.forgetPassword();
-      setData(state.value!.copyWith(remembered: false));
+      await _methods.invokeMethod('forgetPassword');
     } on PlatformException catch (e) {
       _log.debug('Calling forgetPassword failed with exception: $e');
     }
@@ -112,177 +112,127 @@ final androidCredentialListProvider = StateNotifierProvider.autoDispose
     .family<OathCredentialListNotifier, List<OathPair>?, DevicePath>(
   (ref, devicePath) {
     var notifier = _AndroidCredentialListNotifier(
-      ref.watch(currentDeviceProvider),
-      ref.watch(oathApiProvider),
-      ref.watch(androidCredentialsProvider),
+      ref.watch(withContextProvider),
+      ref.watch(currentDeviceProvider)?.transport == Transport.usb,
     );
-    ref.listen<WindowState>(windowStateProvider, (_, windowState) {
-      notifier._notifyWindowState(windowState);
-    }, fireImmediately: true);
     return notifier;
   },
 );
 
 class _AndroidCredentialListNotifier extends OathCredentialListNotifier {
-  final DeviceNode? _currentDevice;
-  final OathApi _api;
-  Timer? _timer;
+  final _events = const EventChannel('android.oath.credentials');
+  final WithContext _withContext;
+  final bool _isUsbAttached;
+  late StreamSubscription _sub;
 
-  _AndroidCredentialListNotifier(
-      this._currentDevice, this._api, List<OathPair>? pairs)
+  _AndroidCredentialListNotifier(this._withContext, this._isUsbAttached)
       : super() {
-    state = pairs;
-    _scheduleRefresh();
-  }
-
-  void _notifyWindowState(WindowState windowState) {
-    if (_currentDevice == null) return;
-    if (windowState.active) {
-      _scheduleRefresh();
-    } else {
-      _timer?.cancel();
-    }
+    _sub = _events.receiveBroadcastStream().listen((event) {
+      final json = jsonDecode(event);
+      state = json != null
+          ? List.unmodifiable(
+              (json as List).map((e) => OathPair.fromJson(e)).toList())
+          : null;
+    });
   }
 
   @override
   void dispose() {
-    _timer?.cancel();
+    _sub.cancel();
     super.dispose();
   }
 
   @override
-  @protected
-  set state(List<OathPair>? value) {
-    super.state = value != null ? List.unmodifiable(value) : null;
-  }
+  Future<OathCode> calculate(OathCredential credential) async {
+    // Prompt for touch if needed
+    UserInteractionController? controller;
+    Timer? touchTimer;
+    if (_isUsbAttached) {
+      void triggerTouchPrompt() async {
+        controller = await _withContext(
+          (context) async => promptUserInteraction(
+            context,
+            icon: const Icon(Icons.touch_app),
+            title: 'Touch Required',
+            description: 'Touch the button on your YubiKey now.',
+          ),
+        );
+      }
 
-  @override
-  Future<OathCode> calculate(OathCredential credential,
-      {bool update = true}) async {
-    final OathCode code;
-    var resultJson = await _api.calculate(credential.id);
-    var result = jsonDecode(resultJson);
-    code = OathCode.fromJson(result);
-    _log.debug('Calculate', jsonEncode(code));
-    if (update && mounted) {
-      final creds = state!.toList();
-      final i = creds.indexWhere((e) => e.credential.id == credential.id);
-      state = creds..[i] = creds[i].copyWith(code: code);
+      if (credential.touchRequired) {
+        triggerTouchPrompt();
+      } else if (credential.oathType == OathType.hotp) {
+        touchTimer =
+            Timer(const Duration(milliseconds: 500), triggerTouchPrompt);
+      }
+    }
+
+    try {
+      final resultJson = await _methods
+          .invokeMethod('calculate', {'credentialId': credential.id});
+      _log.debug('Calculate', resultJson);
+      return OathCode.fromJson(jsonDecode(resultJson));
+    } on PlatformException catch (pe) {
+      if (CancellationException.isCancellation(pe)) {
+        throw CancellationException();
+      }
+      rethrow;
+    } finally {
+      touchTimer?.cancel();
+      controller?.close();
     }
-    return code;
   }
 
   @override
   Future<OathCredential> addAccount(Uri credentialUri,
       {bool requireTouch = false}) async {
-    String resultString =
-        await _api.addAccount(credentialUri.toString(), requireTouch);
+    try {
+      String resultString = await _methods.invokeMethod('addAccount',
+          {'uri': credentialUri.toString(), 'requireTouch': requireTouch});
 
-    var result = jsonDecode(resultString);
-    refresh();
-    return OathCredential.fromJson(result['credential']);
+      var result = jsonDecode(resultString);
+      return OathCredential.fromJson(result['credential']);
+    } on PlatformException catch (pe) {
+      if (CancellationException.isCancellation(pe)) {
+        throw CancellationException();
+      }
+      _log.error('Failed to add account.', pe);
+      rethrow;
+    }
   }
 
   @override
   Future<OathCredential> renameAccount(
       OathCredential credential, String? issuer, String name) async {
     try {
-      String response;
-      response = await _api.renameAccount(credential.id, name, issuer);
+      final response = await _methods.invokeMethod('renameAccount',
+          {'credentialId': credential.id, 'name': name, 'issuer': issuer});
+
+      _log.debug('Rename response: $response');
 
       var responseJson = jsonDecode(response);
 
-      var renamedCredential = OathCredential.fromJson(responseJson);
-
-      if (mounted) {
-        final newState = state!.toList();
-        final index = newState.indexWhere((e) => e.credential == credential);
-        final oldPair = newState.removeAt(index);
-        newState.add(OathPair(
-          renamedCredential,
-          oldPair.code,
-        ));
-        state = newState;
+      return OathCredential.fromJson(responseJson);
+    } on PlatformException catch (pe) {
+      _log.debug('Failed to execute renameOathCredential: ${pe.message}');
+      if (CancellationException.isCancellation(pe)) {
+        throw CancellationException();
       }
-
-      return renamedCredential;
-    } on PlatformException catch (e) {
-      _log.debug('Failed to execute renameOathCredential: ${e.message}');
+      rethrow;
     }
-
-    return credential;
   }
 
   @override
   Future<void> deleteAccount(OathCredential credential) async {
     try {
-      await _api.deleteAccount(credential.id);
-
-      if (mounted) {
-        state = state!.toList()..removeWhere((e) => e.credential == credential);
-      }
-    } catch (e) {
-      _log.debug('Call to delete credential failed: $e');
-    }
-  }
-
-  refresh() async {
-    if (_currentDevice == null) return;
-    _log.debug('refreshing credentials...');
-
-    try {
-      var resultString = await _api.refreshCodes();
-      var result = jsonDecode(resultString);
-
-      final pairs = result.map((e) => OathPair.fromJson(e)).toList();
-
-      if (mounted) {
-        final current = state?.toList() ?? [];
-        for (var pair in pairs) {
-          final i =
-              current.indexWhere((e) => e.credential.id == pair.credential.id);
-          if (i < 0) {
-            current.add(pair);
-          } else if (pair.code != null) {
-            current[i] = current[i].copyWith(code: pair.code);
-          }
-        }
-        state = current;
-        _scheduleRefresh();
-      }
-    } catch (e) {
-      _log.debug('Failure refreshing codes: $e');
-    }
-  }
-
-  _scheduleRefresh() {
-    _timer?.cancel();
-    if (_currentDevice == null) return;
-    if (state == null) {
-      _log.debug('No OATH state, refresh immediately');
-      refresh();
-    } else if (mounted) {
-      final expirations = (state ?? [])
-          .where((pair) =>
-              pair.credential.oathType == OathType.totp &&
-              !pair.credential.touchRequired)
-          .map((e) => e.code)
-          .whereType<OathCode>()
-          .map((e) => e.validTo);
-      if (expirations.isEmpty) {
-        _log.debug('No expirations, no refresh');
-        _timer = null;
-      } else {
-        final earliest = expirations.reduce(min) * 1000;
-        final now = DateTime.now().millisecondsSinceEpoch;
-        if (earliest < now) {
-          _log.debug('Already expired, refresh immediately');
-          refresh();
-        } else {
-          _log.debug('Schedule refresh in ${earliest - now}ms');
-          _timer = Timer(Duration(milliseconds: earliest - now), refresh);
-        }
+      await _methods
+          .invokeMethod('deleteAccount', {'credentialId': credential.id});
+    } on PlatformException catch (e) {
+      _log.debug('Received exception: $e');
+      if (CancellationException.isCancellation(e)) {
+        throw CancellationException();
       }
+      rethrow;
     }
   }
 }

lib/android/qr_scanner/qr_scanner_overlay_view.dart

@@ -0,0 +1,111 @@
+import 'package:flutter/material.dart';
+
+import 'qr_scanner_scan_status.dart';
+import 'qr_scanner_util.dart';
+
+/// Return the rounded rect which represents the scanner area for the background
+/// overlay and the stroke
+RRect _getScannerAreaRRect(Size size) {
+  double scannerAreaWidth = getScannerAreaWidth(size);
+  var scannerAreaRect = Rect.fromCenter(
+      center: Offset(size.width / 2, size.height / 2),
+      width: scannerAreaWidth,
+      height: scannerAreaWidth);
+
+  return RRect.fromRectAndRadius(
+      scannerAreaRect, const Radius.circular(scannerAreaRadius));
+}
+
+// CustomPainter which strokes the scannerArea
+class _ScannerAreaStrokePainter extends CustomPainter {
+  final Color _strokeColor;
+
+  _ScannerAreaStrokePainter(this._strokeColor) : super();
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    Paint paint = Paint()
+      ..color = _strokeColor
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 3.0;
+
+    Path path = Path()..addRRect(_getScannerAreaRRect(size));
+    canvas.drawPath(path, paint);
+  }
+
+  @override
+  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
+}
+
+/// clips the scanner area rounded rect of specific Size
+class _ScannerAreaClipper extends CustomClipper<Path> {
+  @override
+  Path getClip(Size size) {
+    return Path()
+      ..addRect(Rect.fromLTWH(0, 0, size.width, size.height))
+      ..addRRect(_getScannerAreaRRect(size))
+      ..fillType = PathFillType.evenOdd;
+  }
+
+  @override
+  bool shouldReclip(covariant CustomClipper<Path> oldClipper) => true;
+}
+
+class QRScannerOverlay extends StatelessWidget {
+  final ScanStatus status;
+  final Size screenSize;
+
+  const QRScannerOverlay({
+    super.key,
+    required this.status,
+    required this.screenSize,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    var size = screenSize;
+
+    return Stack(children: [
+      /// clip scanner area "hole" into a darkened background
+      ClipPath(
+          clipper: _ScannerAreaClipper(),
+          child: Opacity(
+              opacity: 0.6,
+              child: ColoredBox(
+                  color: Colors.black,
+                  child: Column(
+                    mainAxisSize: MainAxisSize.max,
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: const [Spacer()],
+                  )))),
+
+      /// draw a stroke around the scanner area
+      Column(
+        mainAxisSize: MainAxisSize.max,
+        mainAxisAlignment: MainAxisAlignment.center,
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: [
+          CustomPaint(
+            painter: _ScannerAreaStrokePainter(status == ScanStatus.error
+                ? Colors.red.shade400
+                : Colors.green.shade400),
+          ),
+        ],
+      ),
+
+      /// extra icon when successful scan occurred
+      if (status == ScanStatus.success)
+        Positioned.fromRect(
+            rect: Rect.fromCenter(
+                center: Offset(size.width / 2, size.height / 2),
+                width: size.width,
+                height: size.height),
+            child: Icon(
+              Icons.check_circle,
+              size: 200,
+              color: Colors.green.shade400,
+            )),
+    ]);
+  }
+}

lib/android/qr_scanner/qr_scanner_permissions_view.dart

@@ -0,0 +1,83 @@
+import 'package:flutter/material.dart';
+
+import 'qr_scanner_scan_status.dart';
+import 'qr_scanner_util.dart';
+
+class QRScannerPermissionsUI extends StatelessWidget {
+  final ScanStatus status;
+  final Size screenSize;
+  final Function onPermissionRequest;
+
+  const QRScannerPermissionsUI({
+    super.key,
+    required this.status,
+    required this.screenSize,
+    required this.onPermissionRequest
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    var scannerAreaWidth = getScannerAreaWidth(screenSize);
+
+    return Stack(children: [
+      /// instruction text under the scanner area
+      Positioned.fromRect(
+          rect: Rect.fromCenter(
+              center: Offset(screenSize.width / 2,
+                  screenSize.height - scannerAreaWidth / 2.0 + 8.0),
+              width: screenSize.width,
+              height: screenSize.height),
+          child: const Padding(
+            padding: EdgeInsets.symmetric(horizontal: 36),
+            child: Text(
+              'Yubico Authenticator needs Camera permissions for scanning QR codes.',
+              style: TextStyle(color: Colors.white),
+              textAlign: TextAlign.center,
+            ),
+          )),
+
+      /// button for manual entry
+      Positioned.fromRect(
+        rect: Rect.fromCenter(
+            center: Offset(screenSize.width / 2, screenSize.height),
+            width: screenSize.width,
+            height: screenSize.height),
+        child: Row(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+            children: [
+          Column(
+            children: [
+              const Text(
+                'Have account info?',
+                textScaleFactor: 0.7,
+                style: TextStyle(color: Colors.white),
+              ),
+              OutlinedButton(
+                  onPressed: () {
+                    Navigator.of(context).pop();
+                  },
+                  child: const Text('Enter manually',
+                      style: TextStyle(color: Colors.white))),
+            ],
+          ),
+              Column(
+                children: [
+                  const Text(
+                    'Would like to scan?',
+                    textScaleFactor: 0.7,
+                    style: TextStyle(color: Colors.white),
+                  ),
+                  OutlinedButton(
+                      onPressed: () {
+                        onPermissionRequest();
+                      },
+                      child: const Text('Review permissions',
+                          style: TextStyle(color: Colors.white))),
+                ],
+              )
+        ]),
+      ),
+    ]);
+  }
+}

lib/android/qr_scanner/qr_scanner_scan_status.dart

@@ -0,0 +1,5 @@
+/// Status of the scanning process
+/// scanning - showing preview and scanning it for finding credential QR code
+/// error - a QR code has been found but is not a credential
+/// success - a QR code has been found and is a usable credential
+enum ScanStatus { scanning, error, success }

lib/android/qr_scanner/qr_scanner_ui_view.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/material.dart';
+
+import 'qr_scanner_scan_status.dart';
+import 'qr_scanner_util.dart';
+
+class QRScannerUI extends StatelessWidget {
+  final ScanStatus status;
+  final Size screenSize;
+
+  const QRScannerUI({
+    super.key,
+    required this.status,
+    required this.screenSize,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    var scannerAreaWidth = getScannerAreaWidth(screenSize);
+
+    return Stack(children: [
+      /// instruction text under the scanner area
+      Positioned.fromRect(
+        rect: Rect.fromCenter(
+            center: Offset(screenSize.width / 2,
+                screenSize.height + scannerAreaWidth / 2.0 + 8.0),
+            width: screenSize.width,
+            height: screenSize.height),
+        child: Text(
+          status != ScanStatus.error
+              ? 'Point your camera at a QR code to scan it'
+              : 'Invalid QR code',
+          style: const TextStyle(color: Colors.white),
+          textAlign: TextAlign.center,
+        ),
+      ),
+
+      /// button for manual entry
+      Positioned.fromRect(
+        rect: Rect.fromCenter(
+            center: Offset(screenSize.width / 2,
+                screenSize.height + scannerAreaWidth / 2.0 + 80.0),
+            width: screenSize.width,
+            height: screenSize.height),
+        child: Column(
+          children: [
+            const Text(
+              'No QR code?',
+              textScaleFactor: 0.7,
+              style: TextStyle(color: Colors.white),
+            ),
+            OutlinedButton(
+                onPressed: () {
+                  Navigator.of(context).pop();
+                },
+                child: const Text('Enter manually',
+                    style: TextStyle(color: Colors.white))),
+          ],
+        ),
+      ),
+    ]);
+  }
+}

lib/android/qr_scanner/qr_scanner_util.dart

@@ -0,0 +1,5 @@
+import 'dart:ui';
+
+const double scannerAreaRadius = 40.0;
+
+double getScannerAreaWidth(Size size) => size.width - scannerAreaRadius;