Merge PR #239.

android/app/src/main/AndroidManifest.xml

@@ -35,10 +35,20 @@
             <meta-data
                 android:name="io.flutter.embedding.android.NormalTheme"
                 android:resource="@style/NormalTheme" />
+
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data android:scheme="otpauth" />
+            </intent-filter>
         </activity>
 
         <activity-alias

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

@@ -14,6 +14,7 @@ import androidx.core.view.WindowCompat
 import androidx.lifecycle.lifecycleScope
 import com.yubico.authenticator.logging.FlutterLog
 import com.yubico.authenticator.logging.Log
+import com.yubico.authenticator.oath.AppLinkMethodChannel
 import com.yubico.authenticator.oath.OathManager
 import com.yubico.authenticator.oath.OathViewModel
 import com.yubico.yubikit.android.YubiKitManager
@@ -150,6 +151,13 @@ class MainActivity : FlutterFragmentActivity() {
 
         enableAliasMainActivityComponent(true)
 
+        // Handle opening through otpauth:// link
+        val intentData = intent.data
+        if (intentData != null && intentData.scheme == "otpauth") {
+            intent.data = null
+            appLinkMethodChannel.handleUri(intentData)
+        }
+
         // Handle existing tag when launched from NDEF
         val tag = intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG)
         if (tag != null) {
@@ -215,6 +223,7 @@ class MainActivity : FlutterFragmentActivity() {
     private lateinit var flutterLog: FlutterLog
     private lateinit var flutterStreams: List<Closeable>
     private lateinit var appMethodChannel: AppMethodChannel
+    private lateinit var appLinkMethodChannel: AppLinkMethodChannel
 
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
@@ -226,6 +235,7 @@ class MainActivity : FlutterFragmentActivity() {
         dialogManager = DialogManager(messenger, this.lifecycleScope)
         appPreferences = AppPreferences(this)
         appMethodChannel = AppMethodChannel(messenger)
+        appLinkMethodChannel = AppLinkMethodChannel(messenger)
 
         flutterStreams = listOf(
             viewModel.deviceInfo.streamTo(this, messenger, "android.devices.deviceInfo"),

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

@@ -0,0 +1,25 @@
+package com.yubico.authenticator.oath
+
+import android.net.Uri
+import androidx.annotation.UiThread
+import com.yubico.authenticator.logging.Log
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
+import org.json.JSONObject
+
+class AppLinkMethodChannel(messenger: BinaryMessenger) {
+    private val methodChannel = MethodChannel(messenger, "app.link.methods")
+
+    @UiThread
+    fun handleUri(uri: Uri) {
+        Log.t(TAG, "Handling URI: $uri")
+        methodChannel.invokeMethod(
+            "handleOtpAuthLink",
+            JSONObject(mapOf("link" to uri.toString())).toString()
+        )
+    }
+
+    companion object {
+        const val TAG = "AppLinkMethodChannel"
+    }
+}

lib/android/init.dart

@@ -8,6 +8,7 @@ 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/oath/otp_auth_link_handler.dart';
 import 'package:yubico_authenticator/android/window_state_provider.dart';
 import 'package:yubico_authenticator/app/logging.dart';
 
@@ -54,7 +55,8 @@ Future<Widget> initialize() async {
       windowStateProvider.overrideWithProvider(androidWindowStateProvider),
       clipboardProvider.overrideWithProvider(androidClipboardProvider),
       androidSdkVersionProvider.overrideWithValue(await getAndroidSdkVersion()),
-      supportedThemesProvider.overrideWithProvider(androidSupportedThemesProvider)
+      supportedThemesProvider
+          .overrideWithProvider(androidSupportedThemesProvider)
     ],
     child: DismissKeyboard(
       child: YubicoAuthenticatorApp(page: Consumer(
@@ -68,6 +70,9 @@ Future<Widget> initialize() async {
           /// initializes global handler for dialogs
           ref.read(androidDialogProvider);
 
+          /// set context which will handle otpauth links
+          setupOtpAuthLinkHandler(context);
+
           return const MainPage();
         },
       )),

lib/android/oath/otp_auth_link_handler.dart

@@ -0,0 +1,42 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import '../../app/message.dart';
+import '../../oath/models.dart';
+import '../../oath/views/add_account_page.dart';
+
+const _appLinkMethodsChannel = MethodChannel('app.link.methods');
+
+void setupOtpAuthLinkHandler(BuildContext context) {
+  _appLinkMethodsChannel.setMethodCallHandler((call) async {
+    final args = jsonDecode(call.arguments);
+    switch (call.method) {
+      case 'handleOtpAuthLink':
+        {
+          var url = args['link'];
+          var otpauth = CredentialData.fromUri(Uri.parse(url));
+          Navigator.popUntil(context, ModalRoute.withName('/'));
+          await showBlurDialog(
+            context: context,
+            routeSettings: const RouteSettings(name: 'oath_add_account'),
+            builder: (_) {
+              return OathAddAccountPage(
+                null,
+                null,
+                credentials: null,
+                credentialData: otpauth,
+              );
+            },
+          );
+          break;
+        }
+      default:
+        throw PlatformException(
+          code: 'NotImplemented',
+          message: 'Method ${call.method} is not implemented',
+        );
+    }
+  });
+}