crypto: sha1 - export sha1_update for reuse
Export the update function as crypto_sha1_update() to not have the need
to reimplement the same algorithm for each SHA-1 implementation. This
way the generic SHA-1 implementation can be used as fallback for other
implementations that fail to run under certain circumstances, like the
need for an FPU context while executing in IRQ context.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c
index 00ae60e..4279480 100644
--- a/crypto/sha1_generic.c
+++ b/crypto/sha1_generic.c
@@ -36,7 +36,7 @@
return 0;
}
-static int sha1_update(struct shash_desc *desc, const u8 *data,
+int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
@@ -71,6 +71,7 @@
return 0;
}
+EXPORT_SYMBOL(crypto_sha1_update);
/* Add padding and return the message digest. */
@@ -87,10 +88,10 @@
/* Pad out to 56 mod 64 */
index = sctx->count & 0x3f;
padlen = (index < 56) ? (56 - index) : ((64+56) - index);
- sha1_update(desc, padding, padlen);
+ crypto_sha1_update(desc, padding, padlen);
/* Append length */
- sha1_update(desc, (const u8 *)&bits, sizeof(bits));
+ crypto_sha1_update(desc, (const u8 *)&bits, sizeof(bits));
/* Store state in digest */
for (i = 0; i < 5; i++)
@@ -121,7 +122,7 @@
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_init,
- .update = sha1_update,
+ .update = crypto_sha1_update,
.final = sha1_final,
.export = sha1_export,
.import = sha1_import,
diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 069e85b..83e6be5 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -82,4 +82,7 @@
u8 buf[SHA512_BLOCK_SIZE];
};
+extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len);
+
#endif
