Added KeyPermanentlyInvalidatedException handling

[giordanocardillo]

Customers were complaining that device would infinitely ask device password/PIN if they changed it.

I found out that initializing secure storage was bringing to the reuse of the same key, which was permanently invalidated from android system.

I created a method to delete the key if there is a KeyPermanentlyInvalidatedException, therefore the plugin will initialize a new key.

[aximobile]

Hi,

Thanks for providing a fix for the screen-lock issue !

After adding your code to my project, the console shows a different error after deleting the key and executing the init method again: Error: KeyStore doesn't contain alias: xxxx It looks like the key has been removed but doesn't get re-instantiated...

I did some debugging and found an issue in the 'init' method. The key should be created through the generateEncryptionKeys method. Instead, it doesn't pass the following line of code: if (storage.isEmpty()) { //Solves Issue #96. The RSA key may have been deleted by changing the lock type. getStorage(INIT_SERVICE).clear(); rsa.createKeyPair(getContext(), alias, userAuthenticationValidityDuration); }

Since the 'sharedPreferences' folder doesn't get cleared, the key wont be generated.

No idea why this IF statement is required but removing it fixes the issue...

[mateo2181]

@aximobile how did you solve it? removing only the if statement? did you keep these two lines?

getStorage(INIT_SERVICE).clear();
rsa.createKeyPair(getContext(), alias, userAuthenticationValidityDuration);

Thanks!!