On Fri, 13 Nov 2020 22:43:17 GMT, Anthony Scarpino <ascarp...@openjdk.org> 
wrote:

>> The assumption of this whole block here seems to be that ibuffer would not 
>> contain more than a block of buffered data? If that's the case, maybe we can 
>> just use 'ibuffer' instead of allocating a local 'block' and copy the data 
>> into it every time?
>
> This is a very seldom used code path,  There was only one existing test that 
> accesses this code and it has not offset.
> 
> constructBlock() is a generic method.  There should be no case where ibuffer 
> is >= blocksize during this method.   For encryption the two encrypt() only 
> put code in ibuffer.  This method is for normal update() operations.  The 
> other encrypt is for any of the CipherCore internal buffer needs sent to GCM 
> before doing the doFinal.  At that point, ibuffer can be >= blocksize and 
> doFinal will handle it.  Some of this complication will go away with phase 2 
> of separating GCM from CipherCore

The current impl of constructBlock() seems to have code handling ibuffer >= 
blocksize scenario. Could you fix that and also pass the input offset into 
constructBlock() for this RFE?

-------------

PR: https://git.openjdk.java.net/jdk/pull/411

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