Merge pull request #113 from quexten/feature/pin-cache

Implement pincache

agent/config/config.go

@@ -16,6 +16,7 @@ import (
 	"github.com/google/uuid"
 	"github.com/quexten/goldwarden/agent/bitwarden/crypto"
 	"github.com/quexten/goldwarden/agent/notify"
+	"github.com/quexten/goldwarden/agent/pincache"
 	"github.com/quexten/goldwarden/agent/systemauth/pinentry"
 	"github.com/quexten/goldwarden/agent/vault"
 	"github.com/tink-crypto/tink-go/v2/aead/subtle"
@@ -130,6 +131,7 @@ func (c *Config) Unlock(password string) bool {
 	keyBuffer := NewBufferFromBytes(key, c.useMemguard)
 	c.key = &keyBuffer
 	notify.Notify("Goldwarden", "Vault Unlocked", "", 60*time.Second, func() {})
+	pincache.SetPin(c.useMemguard, []byte(password))
 	return true
 }
 
@@ -218,6 +220,8 @@ func (c *Config) UpdatePin(password string, write bool) {
 	if write {
 		c.WriteConfig()
 	}
+
+	pincache.SetPin(c.useMemguard, []byte(password))
 }
 
 func (c *Config) GetToken() (LoginToken, error) {
@@ -536,10 +540,21 @@ func ReadConfig(rtCfg RuntimeConfig) (Config, error) {
 }
 
 func (cfg *Config) TryUnlock(vault *vault.Vault) error {
-	pin, err := pinentry.GetPassword("Unlock Goldwarden", "Enter the vault PIN")
-	if err != nil {
-		return err
+	var pin string
+	if pincache.HasPin() {
+		pinBytes, err := pincache.GetPin()
+		if err != nil {
+			return err
+		}
+		pin = string(pinBytes)
+	} else {
+		var err error
+		pin, err = pinentry.GetPassword("Unlock Goldwarden", "Enter the vault PIN")
+		if err != nil {
+			return err
+		}
 	}
+
 	success := cfg.Unlock(pin)
 	if !success {
 		return errors.New("invalid PIN")

agent/pincache/pincache.go

@@ -0,0 +1,41 @@
+package pincache
+
+import (
+	"errors"
+
+	"github.com/awnumar/memguard"
+	"github.com/quexten/goldwarden/agent/systemauth/biometrics"
+)
+
+var cachedPin *memguard.Enclave
+
+func SetPin(useMemguard bool, pin []byte) {
+	cachedPin = memguard.NewEnclave(pin)
+}
+
+func GetPin() ([]byte, error) {
+	approved := biometrics.CheckBiometrics(biometrics.SSHKey)
+	if approved {
+		bufer, err := cachedPin.Open()
+		if err != nil {
+			return nil, err
+		}
+		return bufer.Bytes(), nil
+	} else {
+		return nil, errors.New("biometrics not approved")
+	}
+}
+
+func HasPin() bool {
+	return cachedPin != nil
+}
+
+func ClearPin() {
+	pin, err := cachedPin.Open()
+	if err != nil {
+		cachedPin = nil
+		return
+	}
+	pin.Destroy()
+	cachedPin = nil
+}

agent/processsecurity/unix.go

@@ -9,6 +9,8 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+const IDLE_TIME = 60 * 15
+
 func DisableDumpable() error {
 	return unix.Prctl(unix.PR_SET_DUMPABLE, 0, 0, 0, 0)
 }
@@ -70,7 +72,7 @@ func MonitorIdle(onidle func()) error {
 			return err
 		}
 		secondsIdle := res / 1000
-		if secondsIdle > 60*1 {
+		if secondsIdle > IDLE_TIME {
 			if !wasidle {
 				wasidle = true
 				onidle()

agent/systemauth/biometrics/biometrics.go

@@ -1,21 +1,11 @@
 package biometrics
 
 import (
-	"os"
-
 	"github.com/quexten/goldwarden/logging"
 )
 
 var log = logging.GetLogger("Goldwarden", "Biometrics")
 
-var biometricsDisabled = false
-
-func init() {
-	if os.Getenv("GOLDWARDEN_SYSTEM_AUTH_DISABLED") == "true" {
-		biometricsDisabled = true
-	}
-}
-
 type Approval string
 
 const (

agent/systemauth/biometrics/polkit.go

@@ -43,10 +43,6 @@ const POLICY = `<?xml version="1.0" encoding="UTF-8"?>
 </policyconfig>`
 
 func CheckBiometrics(approvalType Approval) bool {
-	if biometricsDisabled {
-		return true
-	}
-
 	log.Info("Checking biometrics for %s", approvalType.String())
 
 	authority, err := polkit.NewAuthority()
@@ -84,10 +80,6 @@ func CheckBiometrics(approvalType Approval) bool {
 }
 
 func BiometricsWorking() bool {
-	if biometricsDisabled {
-		return false
-	}
-
 	authority, err := polkit.NewAuthority()
 	if err != nil {
 		log.Warn("Failed to create polkit authority: %s", err.Error())

agent/unixsocketagent.go

@@ -382,7 +382,9 @@ func StartUnixAgent(path string, runtimeConfig config.RuntimeConfig) error {
 	}()
 	go func() {
 		err = processsecurity.MonitorIdle(func() {
-			log.Warn("Idling detected but no action is implemented")
+			cfg.Lock()
+			vault.Clear()
+			vault.Keyring.Lock()
 		})
 		if err != nil {
 			log.Warn("Could not monitor idle: %s", err.Error())