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authorMathias Krause <minipli@googlemail.com>2011-08-04 20:19:24 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2011-08-10 19:00:28 +0800
commit7c390170b49337477985be7a624015160ffeb056 (patch)
treec688eca7b31c154bc107cc107001fe2ffd4c7d99 /crypto
parentb64dc04beba30947dc80745dcb95ae3c04fd18cf (diff)
downloadlinux-stericsson-7c390170b49337477985be7a624015160ffeb056.tar.gz
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>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/sha1_generic.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c
index 00ae60eb9254..42794803c480 100644
--- a/crypto/sha1_generic.c
+++ b/crypto/sha1_generic.c
@@ -36,7 +36,7 @@ static int sha1_init(struct shash_desc *desc)
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 @@ static int sha1_update(struct shash_desc *desc, const u8 *data,
return 0;
}
+EXPORT_SYMBOL(crypto_sha1_update);
/* Add padding and return the message digest. */
@@ -87,10 +88,10 @@ static int sha1_final(struct shash_desc *desc, u8 *out)
/* 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 int sha1_import(struct shash_desc *desc, const void *in)
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,