RFR: 8257769: Cipher.getParameters() throws NPE for ChaCha20-Poly1305 [v2]

[Jamil Nimeh]

On Mon, 7 Dec 2020 19:53:27 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> Jamil Nimeh has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   pre-init getParameters nonce data is now a local variable
>
> src/java.base/share/classes/com/sun/crypto/provider/ChaCha20Cipher.java line 232:
> 
>> 230:             // this call should cause a random nonce to be generated, but
>> 231:             // not attached to the object.
>> 232:             byte[] nonceData = initialized ? nonce : createRandomNonce(null);
> 
> The "initialized" variable is set to false in engineDoFinal() call. So, if users call getParameters() after finish cipher operation, this will return random nonces instead of the one used in previous doFinal operation. Will this be a little un-intuitive?

Unintuitive is a charitable way to put it.  After doFinal the Cipher technically isn't in an uninitialized state per the spec, it's supposed to be in the state it would be immediately following init().  So the wrong behavior would happen in this use case.  Will fix.

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PR: https://git.openjdk.java.net/jdk/pull/1644