From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Thu, 9 Apr 2015 10:55:34 +0000 (+0200)
Subject: crypto: sha256 - implement base layer for SHA-256
X-Git-Tag: omap-for-v4.1/fixes-rc1~140^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11b8d5ef91388162103bf28f2e9d6dfd400d192d;p=pandora-kernel.git

crypto: sha256 - implement base layer for SHA-256

To reduce the number of copies of boilerplate code throughout
the tree, this patch implements generic glue for the SHA-256
algorithm. This allows a specific arch or hardware implementation
to only implement the special handling that it needs.

The users need to supply an implementation of

  void (sha256_block_fn)(struct sha256_state *sst, u8 const *src, int blocks)

and pass it to the SHA-256 base functions. For easy casting between the
prototype above and existing block functions that take a 'u32 state[]'
as their first argument, the 'state' member of struct sha256_state is
moved to the base of the struct.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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