tree dcf49433900cf15feb004954a50297278b2675ef
parent 558184f52fa7822a0bde230a93e552f137ac91a4
author Alex Klyubin <klyubin@google.com> 1428511336 -0700
committer Alex Klyubin <klyubin@google.com> 1428511576 -0700

Refuse to reuse IV in encryption mode in AndroidKeyStore.

This makes IV-using Cipher implementations backed by AndroidKeyStore
refuse to be reused. After Cipher.doFinal completes, invoking update
or doFinal will raise an exception. This is to make it harder to
violate the security best practice of not reusing IV in encryption
mode.

Bug: 18088752
Change-Id: I5102f9e8b2ff428254294703e48948ea8576603d