crypto: sha1 - implement base layer for SHA-1
To reduce the number of copies of boilerplate code throughout
the tree, this patch implements generic glue for the SHA-1
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 (sha1_block_fn)(struct sha1_state *sst, u8 const *src, int blocks)
and pass it to the SHA-1 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 sha1_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 190f8a0..a9aad8e 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -65,8 +65,8 @@
#define SHA512_H7 0x5be0cd19137e2179ULL
struct sha1_state {
- u64 count;
u32 state[SHA1_DIGEST_SIZE / 4];
+ u64 count;
u8 buffer[SHA1_BLOCK_SIZE];
};