Disable 'Enable biometrics' option if there are not biometric authenticators enrolled. (#6714)

* Disable 'Enable biometrics' option if there are not biometric authenticators enrolled.

* Improve biometric pref enabled check

* Fix changelog issue

* Address review comments. Add extra catch clauses to key migrations.

* Add tests for key migrators

changelog.d/6713.bugfix

@@ -0,0 +1 @@
+Disable 'Enable biometrics' option if there are not biometric authenticators enrolled.

vector/src/androidTest/java/im/vector/app/features/pin/lockscreen/crypto/KeyStoreCryptoTests.kt

@@ -18,6 +18,7 @@ package im.vector.app.features.pin.lockscreen.crypto
 
 import android.os.Build
 import android.security.keystore.KeyPermanentlyInvalidatedException
+import android.security.keystore.UserNotAuthenticatedException
 import androidx.test.platform.app.InstrumentationRegistry
 import im.vector.app.TestBuildVersionSdkIntProvider
 import io.mockk.every
@@ -69,10 +70,12 @@ class KeyStoreCryptoTests {
         runCatching { keyStoreCrypto.ensureKey() }
         keyStoreCrypto.hasValidKey() shouldBe true
 
-        val exception = KeyPermanentlyInvalidatedException()
+        val keyInvalidatedException = KeyPermanentlyInvalidatedException()
-        every { secretStoringUtils.getEncryptCipher(any()) } throws exception
+        every { secretStoringUtils.getEncryptCipher(any()) } throws keyInvalidatedException
+        keyStoreCrypto.hasValidKey() shouldBe false
 
-        runCatching { keyStoreCrypto.ensureKey() }
+        val userNotAuthenticatedException = UserNotAuthenticatedException()
+        every { secretStoringUtils.getEncryptCipher(any()) } throws userNotAuthenticatedException
         keyStoreCrypto.hasValidKey() shouldBe false
     }
 

vector/src/main/java/im/vector/app/features/pin/lockscreen/crypto/KeyStoreCrypto.kt

@@ -20,6 +20,7 @@ import android.annotation.SuppressLint
 import android.content.Context
 import android.os.Build
 import android.security.keystore.KeyPermanentlyInvalidatedException
+import android.security.keystore.UserNotAuthenticatedException
 import android.util.Base64
 import androidx.annotation.VisibleForTesting
 import androidx.biometric.BiometricPrompt
@@ -117,6 +118,8 @@ class KeyStoreCrypto @AssistedInject constructor(
                 true
             } catch (e: KeyPermanentlyInvalidatedException) {
                 false
+            } catch (e: UserNotAuthenticatedException) {
+                false
             }
         } else {
             keyExists

vector/src/main/java/im/vector/app/features/pin/lockscreen/crypto/migrations/MissingSystemKeyMigrator.kt

@@ -19,6 +19,7 @@ package im.vector.app.features.pin.lockscreen.crypto.migrations
 import android.annotation.SuppressLint
 import android.os.Build
 import android.security.keystore.KeyPermanentlyInvalidatedException
+import android.security.keystore.UserNotAuthenticatedException
 import im.vector.app.features.pin.lockscreen.crypto.KeyStoreCrypto
 import im.vector.app.features.pin.lockscreen.di.BiometricKeyAlias
 import im.vector.app.features.settings.VectorPreferences
@@ -45,7 +46,9 @@ class MissingSystemKeyMigrator @Inject constructor(
             try {
                 keystoreCryptoFactory.provide(systemKeyAlias, true).ensureKey()
             } catch (e: KeyPermanentlyInvalidatedException) {
-                Timber.e("Could not automatically create biometric key.", e)
+                Timber.e("Could not automatically create biometric key because it was invalidated.", e)
+            } catch (e: UserNotAuthenticatedException) {
+                Timber.e("Could not automatically create biometric key because there are no enrolled biometric authenticators.", e)
             }
         }
     }

vector/src/main/java/im/vector/app/features/pin/lockscreen/crypto/migrations/SystemKeyV1Migrator.kt

@@ -17,9 +17,11 @@
 package im.vector.app.features.pin.lockscreen.crypto.migrations
 
 import android.os.Build
+import android.security.keystore.UserNotAuthenticatedException
 import androidx.annotation.RequiresApi
 import im.vector.app.features.pin.lockscreen.crypto.KeyStoreCrypto
 import im.vector.app.features.pin.lockscreen.di.BiometricKeyAlias
+import timber.log.Timber
 import java.security.KeyStore
 import javax.inject.Inject
 
@@ -39,7 +41,11 @@ class SystemKeyV1Migrator @Inject constructor(
     fun migrate() {
         keyStore.deleteEntry(SYSTEM_KEY_ALIAS_V1)
         val systemKeyStoreCrypto = keystoreCryptoFactory.provide(systemKeyAlias, keyNeedsUserAuthentication = true)
-        systemKeyStoreCrypto.ensureKey()
+        try {
+            systemKeyStoreCrypto.ensureKey()
+        } catch (e: UserNotAuthenticatedException) {
+            Timber.e("Could not migrate v1 biometric key because there are no enrolled biometric authenticators.", e)
+        }
     }
 
     /**

vector/src/main/java/im/vector/app/features/pin/lockscreen/ui/LockScreenFragment.kt

@@ -59,7 +59,7 @@ class LockScreenFragment : VectorBaseFragment<FragmentLockScreenBinding>() {
             if (state.lockScreenConfiguration.mode == LockScreenMode.CREATE) return@withState
 
             viewLifecycleOwner.lifecycleScope.launchWhenResumed {
-                if (state.isBiometricKeyInvalidated) {
+                if (state.canUseBiometricAuth && state.isBiometricKeyInvalidated) {
                     lockScreenListener?.onBiometricKeyInvalidated()
                 } else if (state.showBiometricPromptAutomatically) {
                     showBiometricPrompt()

vector/src/main/java/im/vector/app/features/settings/VectorSettingsPinFragment.kt

@@ -60,17 +60,16 @@ class VectorSettingsPinFragment @Inject constructor(
         findPreference<SwitchPreference>(VectorPreferences.SETTINGS_SECURITY_USE_BIOMETRICS_FLAG)!!
     }
 
-    private fun shouldCheckBiometricPref(isPinCodeChecked: Boolean): Boolean {
+    private fun updateBiometricPrefState(isPinCodeChecked: Boolean) {
-        return isPinCodeChecked && // Biometric auth depends on PIN auth
+        // Biometric auth depends on PIN auth
-                biometricHelper.isSystemAuthEnabledAndValid &&
+        useBiometricPref.isEnabled = isPinCodeChecked && biometricHelper.canUseAnySystemAuth
-                biometricHelper.isSystemKeyValid
+        useBiometricPref.isChecked = isPinCodeChecked && biometricHelper.isSystemAuthEnabledAndValid
     }
 
     override fun onResume() {
         super.onResume()
 
-        useBiometricPref.isEnabled = usePinCodePref.isChecked
+        updateBiometricPrefState(isPinCodeChecked = usePinCodePref.isChecked)
-        useBiometricPref.isChecked = shouldCheckBiometricPref(usePinCodePref.isChecked)
     }
 
     override fun bindPref() {
@@ -78,8 +77,7 @@ class VectorSettingsPinFragment @Inject constructor(
 
         usePinCodePref.setOnPreferenceChangeListener { _, value ->
             val isChecked = (value as? Boolean).orFalse()
-            useBiometricPref.isEnabled = isChecked
+            updateBiometricPrefState(isPinCodeChecked = isChecked)
-            useBiometricPref.isChecked = shouldCheckBiometricPref(isChecked)
             if (!isChecked) {
                 disableBiometricAuthentication()
             }
@@ -104,7 +102,7 @@ class VectorSettingsPinFragment @Inject constructor(
                     }.onFailure {
                         showEnableBiometricErrorMessage()
                     }
-                    useBiometricPref.isChecked = shouldCheckBiometricPref(usePinCodePref.isChecked)
+                    updateBiometricPrefState(isPinCodeChecked = usePinCodePref.isChecked)
                 }
                 false
             } else {

vector/src/test/java/im/vector/app/features/pin/lockscreen/crypto/migrations/MissingSystemKeyMigratorTests.kt

@@ -18,6 +18,7 @@ package im.vector.app.features.pin.lockscreen.crypto.migrations
 
 import android.os.Build
 import android.security.keystore.KeyPermanentlyInvalidatedException
+import android.security.keystore.UserNotAuthenticatedException
 import im.vector.app.features.pin.lockscreen.crypto.KeyStoreCrypto
 import im.vector.app.features.settings.VectorPreferences
 import im.vector.app.test.TestBuildVersionSdkIntProvider
@@ -59,6 +60,17 @@ class MissingSystemKeyMigratorTests {
         invoking { missingSystemKeyMigrator.migrate() } shouldNotThrow KeyPermanentlyInvalidatedException::class
     }
 
+    @Test
+    fun migrateHandlesUserNotAuthenticatedExceptions() {
+        val keyStoreCryptoMock = mockk<KeyStoreCrypto> {
+            every { ensureKey() } throws UserNotAuthenticatedException()
+        }
+        every { keyStoreCryptoFactory.provide(any(), any()) } returns keyStoreCryptoMock
+        every { vectorPreferences.useBiometricsToUnlock() } returns true
+
+        invoking { missingSystemKeyMigrator.migrate() } shouldNotThrow UserNotAuthenticatedException::class
+    }
+
     @Test
     fun migrateReturnsEarlyIfBiometricAuthIsDisabled() {
         val keyStoreCryptoMock = mockk<KeyStoreCrypto> {

vector/src/test/java/im/vector/app/features/pin/lockscreen/crypto/migrations/SystemKeyV1MigratorTests.kt

@@ -16,11 +16,14 @@
 
 package im.vector.app.features.pin.lockscreen.crypto.migrations
 
+import android.security.keystore.UserNotAuthenticatedException
 import im.vector.app.features.pin.lockscreen.crypto.KeyStoreCrypto
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.verify
+import org.amshove.kluent.invoking
 import org.amshove.kluent.shouldBe
+import org.amshove.kluent.shouldNotThrow
 import org.junit.Test
 import java.security.KeyStore
 
@@ -39,6 +42,19 @@ class SystemKeyV1MigratorTests {
         systemKeyV1Migrator.isMigrationNeeded() shouldBe false
     }
 
+    @Test
+    fun migrateHandlesUserNotAuthenticatedException() {
+        val keyStoreCryptoMock = mockk<KeyStoreCrypto> {
+            every { ensureKey() } throws UserNotAuthenticatedException()
+        }
+        every { keyStoreCryptoFactory.provide("vector.system_new", any()) } returns keyStoreCryptoMock
+
+        invoking { systemKeyV1Migrator.migrate() } shouldNotThrow UserNotAuthenticatedException::class
+
+        verify { keyStore.deleteEntry(SystemKeyV1Migrator.SYSTEM_KEY_ALIAS_V1) }
+        verify { keyStoreCryptoMock.ensureKey() }
+    }
+
     @Test
     fun migrateDeletesOldEntryAndEnsuresNewKey() {
         val keyStoreCryptoMock = mockk<KeyStoreCrypto> {