[openssl-dev] GOST89 cipher control command

[Dmitry Belyavsky]

Hello Openssl team,

GOST89 cipher algorithm seems to be the only cipher algorithm supporting
more than one sets of S-boxes.

Current implementation of the GOST89 cipher provided by the ccgost engine
does not allow to specify usage of particular S-boxes for a particular
EVP_CIPHER_CTX instance. If I understand correctly, the only way to do it
is to specify a ctrl-command and implement it in the engine.

Is it OK to reuse EVP_CTRL_INIT ctrl command for this purpose or it will be
better to add a special value for this?

Thank you!

-- 
SY, Dmitry Belyavsky
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