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crypto: sha256 - Expose SHA256 generic routine to be callable externally.

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Other SHA256 routine may need to use the generic routine when
FPU is not available.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tim Chen 2013-03-26 13:58:49 -07:00 committed by Herbert Xu
parent 873b9cafa8
commit 35d2c9d0c3
2 changed files with 8 additions and 5 deletions
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11
crypto/sha256_generic.c
View File

@ -246,7 +246,7 @@ static int sha256_init(struct shash_desc *desc)
return 0; return 0;
} }
static int sha256_update(struct shash_desc *desc, const u8 *data, int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
unsigned int len) unsigned int len)
{ {
struct sha256_state *sctx = shash_desc_ctx(desc); struct sha256_state *sctx = shash_desc_ctx(desc);
@ -277,6 +277,7 @@ static int sha256_update(struct shash_desc *desc, const u8 *data,
return 0; return 0;
} }
EXPORT_SYMBOL(crypto_sha256_update);
static int sha256_final(struct shash_desc *desc, u8 *out) static int sha256_final(struct shash_desc *desc, u8 *out)
{ {
@ -293,10 +294,10 @@ static int sha256_final(struct shash_desc *desc, u8 *out)
/* Pad out to 56 mod 64. */ /* Pad out to 56 mod 64. */
index = sctx->count & 0x3f; index = sctx->count & 0x3f;
pad_len = (index < 56) ? (56 - index) : ((64+56) - index); pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
sha256_update(desc, padding, pad_len); crypto_sha256_update(desc, padding, pad_len);
/* Append length (before padding) */ /* Append length (before padding) */
sha256_update(desc, (const u8 *)&bits, sizeof(bits)); crypto_sha256_update(desc, (const u8 *)&bits, sizeof(bits));
/* Store state in digest */ /* Store state in digest */
for (i = 0; i < 8; i++) for (i = 0; i < 8; i++)
@ -339,7 +340,7 @@ static int sha256_import(struct shash_desc *desc, const void *in)
static struct shash_alg sha256_algs[2] = { { static struct shash_alg sha256_algs[2] = { {
.digestsize = SHA256_DIGEST_SIZE, .digestsize = SHA256_DIGEST_SIZE,
.init = sha256_init, .init = sha256_init,
.update = sha256_update, .update = crypto_sha256_update,
.final = sha256_final, .final = sha256_final,
.export = sha256_export, .export = sha256_export,
.import = sha256_import, .import = sha256_import,
@ -355,7 +356,7 @@ static struct shash_alg sha256_algs[2] = { {
}, { }, {
.digestsize = SHA224_DIGEST_SIZE, .digestsize = SHA224_DIGEST_SIZE,
.init = sha224_init, .init = sha224_init,
.update = sha256_update, .update = crypto_sha256_update,
.final = sha224_final, .final = sha224_final,
.descsize = sizeof(struct sha256_state), .descsize = sizeof(struct sha256_state),
.base = { .base = {

2
include/crypto/sha.h
View File

@ -87,4 +87,6 @@ struct shash_desc;
extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data, extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len); unsigned int len);
extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
unsigned int len);
#endif #endif