[Cryptech Tech] need SHA-224 support

[Joachim Strömbergson]

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Aloha!

Francis Dupont wrote:
> Today only 5 from the 6 SHA-2 algorithms are supported: there is no 
> support for SHA-224 which is used by TSIG (cf RFC 4635) when the
> almost useless SHA-512/224 is supported... Can you consider this
> message as a formal request to add SHA-224 support?
> 
> Thanks
> 
> Francis.Dupont at fdupont.fr
> 
> PS: this is trivial for the libhal mixed-mode code, a bit harder for 
> the core code but you already have SHA-384 which is pretty similar.

Or more correctly, SHA224 is a truncated version of SHA256 with
different initial h values so the core effected would be SHA256, not
SHA512. Adding support for SHA224 would be fast. In the order of a
couple of hours including updating API and testbench.

Shall I do it?
- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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