Question about seqbuf in cipher-chacha-libcrypto.c

rapier rapier at
Fri Apr 23 01:31:35 AEST 2021

I'm about to port the changes over to that today. The way I look at it 
I'm either screwing up the block count or I have some idiotic fencepost 
issue. Mostly I'm trying to maximize throughput by parallelizing some 
aspect of the encipherment process for chacha. I probably need to just 
focus on the cipher itself but I wanted to try a different approach first.

Anyway, thanks for taking a look. If anything interesting comes up I'll 
let people know.


On 4/21/21 10:02 PM, Damien Miller wrote:
> On Wed, 21 Apr 2021, rapier wrote:
>> For various reasons I'd like to be able to understand how the block
>> counter is handled cipher-chacha-libcrypto.c (mostly to test something
>> that will probably go nowhere).
> I don't have any insight into the problem you're seeing except to note
> that you don't seem to be doing anything obviously wrong.
> As a suggestion, maybe try your experiment in the included portable
> implementation of the cipher (i.e. cipher-chachapoly.c) - there's
> less magic behind the scenes there compared to libcrypto and it's easier
> to insert a bunch of printf()s to see what is actually being supplied to
> the chacha20 primitive.
> -d

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