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Opened by akwizgran@akwizgran
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Crash when trying to load key from keystore

I got the following crash while signing into an existing account on the API 26 emulator:

    java.lang.RuntimeException: java.security.UnrecoverableKeyException: Failed to obtain information about key
        at org.briarproject.briar.android.AndroidKeyStrengthener.isInitialised(AndroidKeyStrengthener.java:83)
        at org.briarproject.bramble.crypto.CryptoComponentImpl.decryptWithPassword(CryptoComponentImpl.java:397)
        at org.briarproject.bramble.account.AccountManagerImpl.loadAndDecryptDatabaseKey(AccountManagerImpl.java:215)
        at org.briarproject.bramble.account.AccountManagerImpl.signIn(AccountManagerImpl.java:198)
        at org.briarproject.briar.android.login.StartupViewModel.lambda$validatePassword$0$StartupViewModel(StartupViewModel.java:108)
        at org.briarproject.briar.android.login.-$$Lambda$StartupViewModel$g7VDyWGXbuZadVRd8U1dRkICyWk.run(Unknown Source:4)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.security.UnrecoverableKeyException: Failed to obtain information about key
        at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreSecretKeyFromKeystore(AndroidKeyStoreProvider.java:282)
        at android.security.keystore.AndroidKeyStoreSpi.engineGetKey(AndroidKeyStoreSpi.java:98)
        at java.security.KeyStoreSpi.engineGetEntry(KeyStoreSpi.java:474)
        at java.security.KeyStore.getEntry(KeyStore.java:1560)
        at org.briarproject.briar.android.AndroidKeyStrengthener.isInitialised(AndroidKeyStrengthener.java:75)
        at org.briarproject.bramble.crypto.CryptoComponentImpl.decryptWithPassword(CryptoComponentImpl.java:397) 
        at org.briarproject.bramble.account.AccountManagerImpl.loadAndDecryptDatabaseKey(AccountManagerImpl.java:215) 
        at org.briarproject.bramble.account.AccountManagerImpl.signIn(AccountManagerImpl.java:198) 
        at org.briarproject.briar.android.login.StartupViewModel.lambda$validatePassword$0$StartupViewModel(StartupViewModel.java:108) 
        at org.briarproject.briar.android.login.-$$Lambda$StartupViewModel$g7VDyWGXbuZadVRd8U1dRkICyWk.run(Unknown Source:4) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at java.lang.Thread.run(Thread.java:764) 
     Caused by: android.security.KeyStoreException: Invalid key blob
        at android.security.KeyStore.getKeyStoreException(KeyStore.java:695)
        at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreSecretKeyFromKeystore(AndroidKeyStoreProvider.java:283)
        at android.security.keystore.AndroidKeyStoreSpi.engineGetKey(AndroidKeyStoreSpi.java:98) 
        at java.security.KeyStoreSpi.engineGetEntry(KeyStoreSpi.java:474) 
        at java.security.KeyStore.getEntry(KeyStore.java:1560) 
        at org.briarproject.briar.android.AndroidKeyStrengthener.isInitialised(AndroidKeyStrengthener.java:75) 
        at org.briarproject.bramble.crypto.CryptoComponentImpl.decryptWithPassword(CryptoComponentImpl.java:397) 
        at org.briarproject.bramble.account.AccountManagerImpl.loadAndDecryptDatabaseKey(AccountManagerImpl.java:215) 
        at org.briarproject.bramble.account.AccountManagerImpl.signIn(AccountManagerImpl.java:198) 
        at org.briarproject.briar.android.login.StartupViewModel.lambda$validatePassword$0$StartupViewModel(StartupViewModel.java:108) 
        at org.briarproject.briar.android.login.-$$Lambda$StartupViewModel$g7VDyWGXbuZadVRd8U1dRkICyWk.run(Unknown Source:4) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at java.lang.Thread.run(Thread.java:764)

Looks like we can get a GeneralSecurityException instead of a clean failure when trying to load the key. We should handle this like a clean failure instead of crashing.

Edited by akwizgran
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