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>
diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index a9aad8e..a75bc80 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -71,8 +71,8 @@
};
struct sha256_state {
- u64 count;
u32 state[SHA256_DIGEST_SIZE / 4];
+ u64 count;
u8 buf[SHA256_BLOCK_SIZE];
};
