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AEADBadTagException AndroidX Jetpack Security startup crash

Aperta
  • Qualcosa non va?
#23 13 commenti 5 reazioni 0 assegnatari Vedi su GitHub

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Valutazione

Difficoltà
5/5
Tempo stimato
Più di una settimana
Idoneità per principianti
25/100
Tipo di issue
Bug
Chiarezza
Da chiarire
Stato di attività
Ferma
Stack tecnologico
java, kotlin
Ambito
cryptography, mobile, security

Direzione di ricerca

Begin with the supplied reproducer and the Application.onCreate startup path; inspect EncryptedSharedPreferences.create, MasterKey.Builder, and the Tink v1.8.0 behavior described in the report. Done means the intermittent AEADBadTagException is explained and a verified fix or clear reproduction is recorded across the reported Android versions.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

p3

Help us help you

We're using Tink via AndroidX Jetpack Security v1.1.0-alpha06 and using the non-deprecated EncryptedSharedPreferences.create method that avoids the race condition when creating a global MasterKey.

The crash happens on: Device - Pixel 7 pro, OS - Android 14

Describe the bug:

The crash isn't consistently reproducible we have crash reports from different devices and across different Android SDK versions.
But according to this stack trace, it's happening on startup during Application.onCreate.

What was the expected behavior?

No crashes.

How can we reproduce the bug?

We're creating an EncryptedSharedPreference instance using the below snippet.

class SharedPreferencesDataSource(
    context: Context,
    filename: String
) {

    companion object {
        fun getEncryptedSharedPreferences(context: Context, filename: String) =
            EncryptedSharedPreferences.create(
                context,
                "${filename}_secure",
                getOrCreateKey(context),
                EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
            )

        private fun getOrCreateKey(context: Context) =
            MasterKey.Builder(context, MasterKey.DEFAULT_MASTER_KEY_ALIAS)
                .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
                .build()
    }
}

Do you have any debugging information?

I've posted a reproducer below.

What version of Tink are you using?

Jetpack Security is using Tink v 1.8.0 behind the scenes.

Can you tell us more about your development environment?
N/A

Is there anything else you'd like to add?

I've read this comment, and mentioned

a) the encrypted keyset has been modified.
b) the current master key in keystore is not the same as the master key that was used to encrypt the keyset.

I'm not sure, though, how this can be caused? We're creating EncryptedSharedPreferences instances, but we never touch the MasterKey used to encrypt the data there.

Lingua principale
Java
Stelle
310
Fork
40
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