3.1.0: Failed to unwrap key

[jonasbark]

I did the upgrade to 3.1.0 from 3.0.0. Execution worked just fine, however after cleaning the app data and reinstalling the app this error showed up - which strikes me as odd.

E/FlutterSecureStoragePl(10643): Registration failed
E/FlutterSecureStoragePl(10643): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl(10643): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl(10643): 	at javax.crypto.Cipher.unwrap(Cipher.java:2121)
E/FlutterSecureStoragePl(10643): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl(10643): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl(10643): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl(10643): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
E/FlutterSecureStoragePl(10643): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:33)
E/FlutterSecureStoragePl(10643): 	at de.ffuf.uffl2.MainActivity.onCreate(MainActivity.kt:11)
E/FlutterSecureStoragePl(10643): 	at android.app.Activity.performCreate(Activity.java:6998)
E/FlutterSecureStoragePl(10643): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1230)
E/FlutterSecureStoragePl(10643): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2899)
E/FlutterSecureStoragePl(10643): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3046)
E/FlutterSecureStoragePl(10643): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
E/FlutterSecureStoragePl(10643): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)
E/FlutterSecureStoragePl(10643): 	at android.os.Handler.dispatchMessage(Handler.java:105)
E/FlutterSecureStoragePl(10643): 	at android.os.Looper.loop(Looper.java:164)
E/FlutterSecureStoragePl(10643): 	at android.app.ActivityThread.main(ActivityThread.java:6798)
E/FlutterSecureStoragePl(10643): 	at java.lang.reflect.Method.invoke(Native Method)
E/FlutterSecureStoragePl(10643): 	at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
E/FlutterSecureStoragePl(10643): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
E/FlutterSecureStoragePl(10643): Caused by: javax.crypto.IllegalBlockSizeException
E/FlutterSecureStoragePl(10643): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl(10643): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl(10643): 	... 19 more
E/FlutterSecureStoragePl(10643): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl(10643): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:695)
E/FlutterSecureStoragePl(10643): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl(10643): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl(10643): 	... 20 more
I/FlutterActivityDelegate(10643): onResume setting current activity to this
Syncing files to device ONEPLUS A3003...
E/flutter (10643): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter (10643): MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage)
E/flutter (10643): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7)
E/flutter (10643): <asynchronous suspension>
E/flutter (10643): #1      FlutterSecureStorage.read (package:flutter_secure_storage/flutter_secure_storage.dart:16:24)
E/flutter (10643): <asynchronous suspension>
E/flutter (10643): #2      AuthService.getAccessToken (package:uffl/network/auth_service.dart:107:37)
E/flutter (10643): <asynchronous suspension>
E/flutter (10643): #3      _RegisterPageState.initState (package:uffl/feature/intro/RegisterPage.dart:42:17)
E/flutter (10643): #4      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3751:58)

[cbenhagen]

Seeing the same when switching between profile and release builds.

Built build/app/outputs/apk/profile/app-profile.apk (13.2MB).
Installing build/app/outputs/apk/app.apk...
W/KeyStore(32540): KeyStore exception
W/KeyStore(32540): android.os.ServiceSpecificException:  (code 7)
W/KeyStore(32540): 	at android.os.Parcel.createException(Parcel.java:1956)
W/KeyStore(32540): 	at android.os.Parcel.readException(Parcel.java:1910)
W/KeyStore(32540): 	at android.os.Parcel.readException(Parcel.java:1860)
W/KeyStore(32540): 	at android.security.IKeystoreService$Stub$Proxy.get(IKeystoreService.java:786)
W/KeyStore(32540): 	at android.security.KeyStore.get(KeyStore.java:195)
W/KeyStore(32540): 	at android.security.keystore.AndroidKeyStoreSpi.engineGetCertificateChain(AndroidKeyStoreSpi.java:118)
W/KeyStore(32540): 	at java.security.KeyStoreSpi.engineGetEntry(KeyStoreSpi.java:484)
W/KeyStore(32540): 	at java.security.KeyStore.getEntry(KeyStore.java:1560)
W/KeyStore(32540): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.getEntry(RSACipher18Implementation.java:69)
W/KeyStore(32540): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:42)
W/KeyStore(32540): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
W/KeyStore(32540): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
W/KeyStore(32540): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
W/KeyStore(32540): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:26)
W/KeyStore(32540): 	at io.ottomatic.odailies.MainActivity.onCreate(MainActivity.java:12)
W/KeyStore(32540): 	at android.app.Activity.performCreate(Activity.java:7136)
W/KeyStore(32540): 	at android.app.Activity.performCreate(Activity.java:7127)
W/KeyStore(32540): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
W/KeyStore(32540): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
W/KeyStore(32540): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
W/KeyStore(32540): 	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
W/KeyStore(32540): 	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
W/KeyStore(32540): 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
W/KeyStore(32540): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
W/KeyStore(32540): 	at android.os.Handler.dispatchMessage(Handler.java:106)
W/KeyStore(32540): 	at android.os.Looper.loop(Looper.java:193)
W/KeyStore(32540): 	at android.app.ActivityThread.main(ActivityThread.java:6669)
W/KeyStore(32540): 	at java.lang.reflect.Method.invoke(Native Method)
W/KeyStore(32540): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
W/KeyStore(32540): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
E/FlutterSecureStoragePl(32540): Registration failed
E/FlutterSecureStoragePl(32540): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl(32540): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl(32540): 	at javax.crypto.Cipher.unwrap(Cipher.java:2440)
E/FlutterSecureStoragePl(32540): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl(32540): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl(32540): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl(32540): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
E/FlutterSecureStoragePl(32540): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:26)
E/FlutterSecureStoragePl(32540): 	at io.ottomatic.odailies.MainActivity.onCreate(MainActivity.java:12)
E/FlutterSecureStoragePl(32540): 	at android.app.Activity.performCreate(Activity.java:7136)
E/FlutterSecureStoragePl(32540): 	at android.app.Activity.performCreate(Activity.java:7127)
E/FlutterSecureStoragePl(32540): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
E/FlutterSecureStoragePl(32540): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
E/FlutterSecureStoragePl(32540): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
E/FlutterSecureStoragePl(32540): 	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
E/FlutterSecureStoragePl(32540): 	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
E/FlutterSecureStoragePl(32540): 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
E/FlutterSecureStoragePl(32540): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
E/FlutterSecureStoragePl(32540): 	at android.os.Handler.dispatchMessage(Handler.java:106)
E/FlutterSecureStoragePl(32540): 	at android.os.Looper.loop(Looper.java:193)
E/FlutterSecureStoragePl(32540): 	at android.app.ActivityThread.main(ActivityThread.java:6669)
E/FlutterSecureStoragePl(32540): 	at java.lang.reflect.Method.invoke(Native Method)
E/FlutterSecureStoragePl(32540): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
E/FlutterSecureStoragePl(32540): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
E/FlutterSecureStoragePl(32540): Caused by: javax.crypto.IllegalBlockSizeException
E/FlutterSecureStoragePl(32540): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl(32540): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl(32540): 	... 22 more
E/FlutterSecureStoragePl(32540): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl(32540): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:839)
E/FlutterSecureStoragePl(32540): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl(32540): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl(32540): 	... 23 more
I/FlutterActivityDelegate(32540): onResume setting current activity to this
I/OpenGLRenderer(32540): Initialized EGL, version 1.4
D/OpenGLRenderer(32540): Swap behavior 1

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.14 18A353d, locale de-CH)
[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.0)
[✓] Android Studio (version 3.1)
[✓] Connected devices (2 available)

• No issues found!

[jeroentrappers]

Same issue here... works fine when installing locally via ADB, but fails when installing from Play store Alpha.

    java.security.InvalidKeyException: Failed to unwrap key
        at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
        at javax.crypto.Cipher.unwrap(Cipher.java:2126)
        at a.b.a.a.a.a(Unknown Source:17)
        at a.b.a.a.c.<init>(Unknown Source:86)
        at a.b.a.a.<init>(Unknown Source:27)
        at a.b.a.a.a(Unknown Source:6)
        at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(Unknown Source:13)```

[ernestomar]

I found a workaround:

The issue was throw because Android application has backups on Google Drive enabled. After disable it in the application with:

android:allowBackup="true"

It works again..

(More info on https://developer.android.com/guide/topics/data/autobackup#EnablingAutoBackup )

ORIGINAL POST
Same issue here with 3.1.1 package version . I pulled modification fro git and then the error raised.

Right now I can't run the project. This is my output

Launching lib/main.dart on Redmi Note 5 in debug mode...
Built build/app/outputs/apk/debug/app-debug.apk.
E/FlutterSecureStoragePl(24032): Registration failed
E/FlutterSecureStoragePl(24032): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl(24032): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl(24032): 	at javax.crypto.Cipher.unwrap(Cipher.java:2126)
E/FlutterSecureStoragePl(24032): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl(24032): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl(24032): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl(24032): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
E/FlutterSecureStoragePl(24032): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:18)
E/FlutterSecureStoragePl(24032): 	at net.it.cirrus.pocketbank.MainActivity.onCreate(MainActivity.java:15)
E/FlutterSecureStoragePl(24032): 	at android.app.Activity.performCreate(Activity.java:7087)
E/FlutterSecureStoragePl(24032): 	at android.app.Activity.performCreate(Activity.java:7078)
E/FlutterSecureStoragePl(24032): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
E/FlutterSecureStoragePl(24032): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2763)
E/FlutterSecureStoragePl(24032): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2888)
E/FlutterSecureStoragePl(24032): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
E/FlutterSecureStoragePl(24032): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1609)
E/FlutterSecureStoragePl(24032): 	at android.os.Handler.dispatchMessage(Handler.java:106)
E/FlutterSecureStoragePl(24032): 	at android.os.Looper.loop(Looper.java:171)
E/FlutterSecureStoragePl(24032): 	at android.app.ActivityThread.main(ActivityThread.java:6606)
E/FlutterSecureStoragePl(24032): 	at java.lang.reflect.Method.invoke(Native Method)
E/FlutterSecureStoragePl(24032): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:518)
E/FlutterSecureStoragePl(24032): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
E/FlutterSecureStoragePl(24032): Caused by: javax.crypto.IllegalBlockSizeException
E/FlutterSecureStoragePl(24032): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl(24032): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl(24032): 	... 20 more
E/FlutterSecureStoragePl(24032): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl(24032): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
E/FlutterSecureStoragePl(24032): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl(24032): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl(24032): 	... 21 more
D/OpenGLRenderer(24032): HWUI GL Pipeline

What I'v tried:

1. Drop App on phone and then run again with USB cable. DON'T WORK
2. Reinstall packages. DON'T WORK
   flutter pub pub cache repair
3. Clean project. DON'T WORK
   flutter clean project
4. Drop App on phone -> Clean project -> Donwngrade to 3.1.0 DON'T WORK. Stacktrace:

Launching lib/main.dart on Redmi Note 5 in debug mode...
Note: /Users/ecampohermoso/opt/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_secure_storage-3.1.0/android/src/main/java/com/it_nomads/fluttersecurestorage/FlutterSecureStoragePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Built build/app/outputs/apk/debug/app-debug.apk.
E/FlutterSecureStoragePl( 7252): Registration failed
E/FlutterSecureStoragePl( 7252): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl( 7252): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl( 7252): 	at javax.crypto.Cipher.unwrap(Cipher.java:2126)
E/FlutterSecureStoragePl( 7252): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl( 7252): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl( 7252): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl( 7252): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl( 7252): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl( 7252): 	... 20 more
E/FlutterSecureStoragePl( 7252): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl( 7252): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
E/FlutterSecureStoragePl( 7252): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl( 7252): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl( 7252): 	... 21 more
D/OpenGLRenderer( 7252): HWUI GL Pipeline
I/OpenGLRenderer( 7252): Initialized EGL, version 1.4
D/OpenGLRenderer( 7252): Swap behavior 2
Application finished.

5. Drop App on phone -> Clean project -> Donwngrade to 3.0.0 DON'T WORK. Error when try to read from secure_storage. Stacktrace:

E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): Failed to handle method call
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): java.lang.IllegalArgumentException: Unsupported value: javax.crypto.BadPaddingException: error:1e000065:Cipher functions:OPENSSL_internal:BAD_DECRYPT
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at io.flutter.plugin.common.StandardMessageCodec.writeValue(StandardMessageCodec.java:293)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at io.flutter.plugin.common.StandardMethodCodec.encodeErrorEnvelope(StandardMethodCodec.java:70)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler$1.error(MethodChannel.java:199)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.onMethodCall(FlutterSecureStoragePlugin.java:75)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:191)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at io.flutter.view.FlutterNativeView.handlePlatformMessage(FlutterNativeView.java:163)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at android.os.MessageQueue.next(MessageQueue.java:331)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at android.os.Looper.loop(Looper.java:147)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at android.app.ActivityThread.main(ActivityThread.java:6606)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:518)
E/MethodChannel#plugins.it_nomads.com/flutter_secure_storage(18212): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
I/zygote64(18212): Background concurrent copying GC freed 4080(250KB) AllocSpace objects, 2(104KB) LOS objects, 55% free, 1219KB/2MB, paused 5.299ms total 108.261ms
W/IInputConnectionWrapper(18212): getTextBeforeCursor on inactive InputConnection
W/IInputConnectionWrapper(18212): getSelectedText on inactive InputConnection
W/IInputConnectionWrapper(18212): getTextAfterCursor on inactive InputConnection

6. Drop Project -> clone Project -> flutter run. DON'T WORK. Exception:

Syncing files to device Redmi Note 5...                          
E/FlutterSecureStoragePl(26649): Registration failed
E/FlutterSecureStoragePl(26649): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl(26649): 	at javax.crypto.Cipher.unwrap(Cipher.java:2126)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
E/FlutterSecureStoragePl(26649): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:18)
E/FlutterSecureStoragePl(26649): 	at net.it.cirrus.pocketbank.MainActivity.onCreate(MainActivity.java:15)
E/FlutterSecureStoragePl(26649): 	at android.app.Activity.performCreate(Activity.java:7087)
E/FlutterSecureStoragePl(26649): 	at android.app.Activity.performCreate(Activity.java:7078)
E/FlutterSecureStoragePl(26649): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2763)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2888)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1609)
E/FlutterSecureStoragePl(26649): 	at android.os.Handler.dispatchMessage(Handler.java:106)
E/FlutterSecureStoragePl(26649): 	at android.os.Looper.loop(Looper.java:171)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.main(ActivityThread.java:6606)
E/FlutterSecureStoragePl(26649): 	at java.lang.reflect.Method.invoke(Native Method)
E/FlutterSecureStoragePl(26649): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:518)
E/FlutterSecureStoragePl(26649): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
E/FlutterSecureStoragePl(26649): Caused by: javax.crypto.IllegalBlockSizeException
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl(26649): 	... 20 more
E/FlutterSecureStoragePl(26649): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl(26649): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl(26649): 	... 21 more
D/OpenGLRenderer(26649): HWUI GL Pipeline
I/flutter (26649): MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage)
I/flutter (26649): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #1      FlutterSecureStorage.read (package:flutter_secure_storage/flutter_secure_storage.dart:16:24)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #2      SecureStorage.read (file:///Users/ecampohermoso/data/pocketX/front-mobile/lib/helpers/secure_storage.dart:16:36)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #3      _AffiliationPage.initState.<anonymous closure> (file:///Users/ecampohermoso/data/pocketX/front-mobile/lib/pages/affiliation.dart:60:23)
I/flutter (26649): #4      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
I/flutter (26649): #5      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:938:9)
I/flutter (26649): #6      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/b
I/OpenGLRenderer(26649): Initialized EGL, version 1.4
D/OpenGLRenderer(26649): Swap behavior 2Syncing files to device Redmi Note 5...                          
E/FlutterSecureStoragePl(26649): Registration failed
E/FlutterSecureStoragePl(26649): java.security.InvalidKeyException: Failed to unwrap key
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:682)
E/FlutterSecureStoragePl(26649): 	at javax.crypto.Cipher.unwrap(Cipher.java:2126)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.unwrap(RSACipher18Implementation.java:46)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:48)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
E/FlutterSecureStoragePl(26649): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
E/FlutterSecureStoragePl(26649): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:18)
E/FlutterSecureStoragePl(26649): 	at net.it.cirrus.pocketbank.MainActivity.onCreate(MainActivity.java:15)
E/FlutterSecureStoragePl(26649): 	at android.app.Activity.performCreate(Activity.java:7087)
E/FlutterSecureStoragePl(26649): 	at android.app.Activity.performCreate(Activity.java:7078)
E/FlutterSecureStoragePl(26649): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2763)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2888)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1609)
E/FlutterSecureStoragePl(26649): 	at android.os.Handler.dispatchMessage(Handler.java:106)
E/FlutterSecureStoragePl(26649): 	at android.os.Looper.loop(Looper.java:171)
E/FlutterSecureStoragePl(26649): 	at android.app.ActivityThread.main(ActivityThread.java:6606)
E/FlutterSecureStoragePl(26649): 	at java.lang.reflect.Method.invoke(Native Method)
E/FlutterSecureStoragePl(26649): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:518)
E/FlutterSecureStoragePl(26649): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
E/FlutterSecureStoragePl(26649): Caused by: javax.crypto.IllegalBlockSizeException
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:519)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineUnwrap(AndroidKeyStoreCipherSpiBase.java:680)
E/FlutterSecureStoragePl(26649): 	... 20 more
E/FlutterSecureStoragePl(26649): Caused by: android.security.KeyStoreException: Unknown error
E/FlutterSecureStoragePl(26649): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
E/FlutterSecureStoragePl(26649): 	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
E/FlutterSecureStoragePl(26649): 	... 21 more
D/OpenGLRenderer(26649): HWUI GL Pipeline
I/flutter (26649): MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage)
I/flutter (26649): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #1      FlutterSecureStorage.read (package:flutter_secure_storage/flutter_secure_storage.dart:16:24)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #2      SecureStorage.read (file:///Users/ecampohermoso/data/pocketX/front-mobile/lib/helpers/secure_storage.dart:16:36)
I/flutter (26649): <asynchronous suspension>
I/flutter (26649): #3      _AffiliationPage.initState.<anonymous closure> (file:///Users/ecampohermoso/data/pocketX/front-mobile/lib/pages/affiliation.dart:60:23)
I/flutter (26649): #4      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
I/flutter (26649): #5      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:938:9)
I/flutter (26649): #6      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/b
I/OpenGLRenderer(26649): Initialized EGL, version 1.4
D/OpenGLRenderer(26649): Swap behavior 2

My Flutter Doctor

[✓] Flutter (Channel beta, v0.7.3, on Mac OS X 10.12.6 16G1510, locale es-BO)
[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
[✓] Android Studio (version 3.0)
[!] IntelliJ IDEA Ultimate Edition (version 2018.2.1)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
[✓] VS Code (version 1.27.0)
[✓] Connected devices (1 available)

[mogol]

I found two similar issues:
https://stackoverflow.com/questions/36652675/java-security-unrecoverablekeyexception-failed-to-obtain-information-about-priv
https://stackoverflow.com/questions/36488219/android-security-keystoreexception-invalid-key-blob

I applied this hack and pushed branch with it. Please try version from branch hack_for_get_entry
Add to pubspec.yaml

  flutter_secure_storage:
    git:
      url: git@github.com:mogol/flutter_secure_storage.git
      ref: hack_for_get_entry

[tom95]

Fighting with the same problem right now. Your branch unfortunately did not change things for me. Without having investigated the call chains in detail, I did notice that the repeat loop was around a different place than the one the exception appears to be thrown from (unwrap). Is that intentional, like an early test?

The most notable oddity, however, is that all builds work flawlessly up to a versionCode of 17. Any build with a higher number fails, any build with a lower number works. Does that help in any way?

[jeroentrappers]

I've made a separate implementation on flutter_keychain which seems to be working fine for me now.

[mogol]

The most notable oddity, however, is that all builds work flawlessly up to a versionCode of 17. Any build with a higher number fails, any build with a lower number works. Does that help in any way?

@tom95 , I am testing on 8.1.0 and still not able to reproduce. So couldn't get the reason why the secret key is encrypted by another key pair.

For now I can add fallback logic: if unwrapping failed, delete all data and start from scratch.
Would it work?

[tom95]

@mogol Ah I did actually mean the app's versionCode, not the OS's. I have no clue why, but any versionCode in the app/build.gradle of 17 or lower threw no error. Starting from 18 any versionCode I tried (18, 19, 20, 100, 1000) exhibited the error. I have not tried reproducing that in an isolated environment, but this is the exact behavior as observed in our app.

I believe just deleting the data on error should be an opt-in fallback, since that may discard valuable info. I can see how that info is not accessible anyways currently, but if a proper fix comes up at some point I would prefer for the data to still be there.

[mogol]

Let's discuss the fix in #23
thanks to @hnvn

[mogol]

Please try v3.1.2.