Why does EncryptedSharedPreferences throw a or InvalidProtocolBufferException?

user_504055 0
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I'm trying to initialise retrieve my app's EncryptedSharedPreferences. I am finding that on one device (A Samsung Galaxy A52 running Android 11) the app crashes on launch due to an InvalidProtocolBufferException, with the call to EncryptedSharedPreferences.create() in the stacktrace. I cannot reproduce this on other devices, including a Samsung Galaxy A52 running Android 12.

    private var encryptedPrefs = EncryptedSharedPreferences.create(
        "keystoreFileName",
        MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
        this, // "this" is my main activity
        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
    )

Here is the exception:

com.google.crypto.tink.shaded.protobuf.InvalidProtocolBufferException: Protocol message contained an invalid tag (zero).

There is also an earlier exception for the same function call, but logged as a warning.

android.security.KeyStoreException: Signature/MAC verification failed

What might cause this, and how should it be fixed?

kotlin android
1 Answers

What version of encrypted shared preferences do you use? use stable instead of alpha versions

user_187793610
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