Сбой Keystore на Android 6

Question

Я тестирую пример приложения Android Keystore из: https://github.com/googlesamples/android-BasicAndroidKeyStore

Но у меня происходит сбой на Samsung A3 (2016) с Android 6.0.1 (на устройстве установлен пин-код).Это тот же сбой, который описан здесь: https://github.com/googlesamples/android-BasicAndroidKeyStore/issues/2 (хотя я не вижу такого сбоя на эмуляторе Android P или на любом другом устройстве, которое у меня есть)

Итак, чтобы увидеть сбой, я просто запускаюприложение и нажмите «СОЗДАТЬ» в меню.

Вот трассировка стека:

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.basicandroidkeystore, PID: 2694
java.security.ProviderException: Failed to load generated key pair from keystore
    at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:491)
    at java.security.KeyPairGenerator$KeyPairGeneratorImpl.generateKeyPair(KeyPairGenerator.java:276)
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.createKeys(BasicAndroidKeyStoreFragment.java:211)
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.onOptionsItemSelected(BasicAndroidKeyStoreFragment.java:89)
    at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2394)
    at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:3326)
    at android.support.v4.app.FragmentController.dispatchOptionsItemSelected(FragmentController.java:344)
    at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:386)
    at com.android.internal.policy.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1249)
    at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:801)
    at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158)
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:954)
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:944)
    at android.widget.ActionMenuView.invokeItem(ActionMenuView.java:726)
    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:239)
    at android.view.View.performClick(View.java:5714)
    at android.widget.TextView.performClick(TextView.java:10926)
    at android.view.View$PerformClick.run(View.java:22589)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:7325)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
 Caused by: java.security.UnrecoverableKeyException: Failed to obtain X.509 form of public key
    at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:223)
    at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:252)
    at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:488)
    at java.security.KeyPairGenerator$KeyPairGeneratorImpl.generateKeyPair(KeyPairGenerator.java:276) 
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.createKeys(BasicAndroidKeyStoreFragment.java:211) 
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.onOptionsItemSelected(BasicAndroidKeyStoreFragment.java:89) 
    at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2394) 
    at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:3326) 
    at android.support.v4.app.FragmentController.dispatchOptionsItemSelected(FragmentController.java:344) 
    at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:386) 
    at com.android.internal.policy.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1249) 
    at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:801) 
    at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158) 
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:954) 
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:944) 
    at android.widget.ActionMenuView.invokeItem(ActionMenuView.java:726) 
    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:239) 
    at android.view.View.performClick(View.java:5714) 
    at android.widget.TextView.performClick(TextView.java:10926) 
    at android.view.View$PerformClick.run(View.java:22589) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:7325) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
 Caused by: android.security.KeyStoreException: OK
    at android.security.KeyStore.getKeyStoreException(KeyStore.java:918)
    at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:223) 
    at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:252) 
    at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:488) 
    at java.security.KeyPairGenerator$KeyPairGeneratorImpl.generateKeyPair(KeyPairGenerator.java:276) 
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.createKeys(BasicAndroidKeyStoreFragment.java:211) 
    at com.example.android.basicandroidkeystore.BasicAndroidKeyStoreFragment.onOptionsItemSelected(BasicAndroidKeyStoreFragment.java:89) 
    at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2394) 
    at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:3326) 
    at android.support.v4.app.FragmentController.dispatchOptionsItemSelected(FragmentController.java:344) 
    at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:386) 
    at com.android.internal.policy.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1249) 
    at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:801) 
    at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158) 
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:954) 
    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:944) 
    at android.widget.ActionMenuView.invokeItem(ActionMenuView.java:726) 
    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:239) 
    at android.view.View.performClick(View.java:5714) 
    at android.widget.TextView.performClick(TextView.java:10926) 
    at android.view.View$PerformClick.run(View.java:22589) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:7325) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 

В частности, эта функция дает сбой: https://github.com/googlesamples/android-BasicAndroidKeyStore/blob/master/Application/src/main/java/com/example/android/basicandroidkeystore/BasicAndroidKeyStoreFragment.java#L156

В этой строке: https://github.com/googlesamples/android-BasicAndroidKeyStore/blob/master/Application/src/main/java/com/example/android/basicandroidkeystore/BasicAndroidKeyStoreFragment.java#L211

Есть идеи как это исправить?