Re: [android-developers] Cipher.wrap() not working in Android 4.2?

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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