does this help?
http://stackoverflow.com/questions/13433529/android-4-2-broke-my-encrypt-decrypt-code-and-the-provided-solutions-dont-work
On Saturday, December 15, 2012 5:17:05 AM UTC+2, Matthew Fleming wrote:
>
>
>> You can also try deriving the wrap key separately with something like:
>>
>> KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt,
>> ITERATION_COUNT, KEY_LENGTH);
>> SecretKeyFactory keyFactory = SecretKeyFactory
>> .getInstance("PBKDF2WithHmacSHA1");
>> SecretKey key = keyFactory.generateSecret(keySpec);
>>
>> And initialize the Cipher in WRAP mode with this SecretKey.
>>
>
> Good thought, but it also does not work. The problem is the same:
> java.lang.UnsupportedOperationException, when I try to wrap the key. This
> only happens in Android 4.2. Everything works fine in 4.1 and every other
> previous version I've tested.
>
> Matthew
>
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