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| author | Mathias Krause <minipli@googlemail.com> | 2011-08-04 20:19:24 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-08-10 19:00:28 +0800 |
| commit | 7c390170b49337477985be7a624015160ffeb056 (patch) | |
| tree | c688eca7b31c154bc107cc107001fe2ffd4c7d99 | |
| parent | b64dc04beba30947dc80745dcb95ae3c04fd18cf (diff) | |
| download | lwn-7c390170b49337477985be7a624015160ffeb056.tar.gz lwn-7c390170b49337477985be7a624015160ffeb056.zip | |
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>
| -rw-r--r-- | crypto/sha1_generic.c | 9 | ||||
| -rw-r--r-- | include/crypto/sha.h | 3 |
2 files changed, 8 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, diff --git a/include/crypto/sha.h b/include/crypto/sha.h index 069e85ba97e1..83e6be5e2707 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -82,4 +82,7 @@ struct sha512_state { u8 buf[SHA512_BLOCK_SIZE]; }; +extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data, + unsigned int len); + #endif |