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crypto: sha1 - Switch to shash

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This patch changes sha1 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Adrian-Ken Rueegsegger 2008-12-02 21:08:20 +08:00 committed by Herbert Xu
parent 3b8efb4c41
commit 54ccb36776
2 changed files with 32 additions and 26 deletions
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2
crypto/Kconfig
View file

@ -351,7 +351,7 @@ config CRYPTO_RMD320
config CRYPTO_SHA1
tristate "SHA1 digest algorithm"
select CRYPTO_ALGAPI
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).

48
crypto/sha1_generic.c
View file

@ -16,10 +16,10 @@
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
#include <linux/types.h>
#include <crypto/sha.h>
@ -31,9 +31,10 @@ struct sha1_ctx {
u8 buffer[64];
};
static void sha1_init(struct crypto_tfm *tfm)
static int sha1_init(struct shash_desc *desc)
{
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
struct sha1_ctx *sctx = shash_desc_ctx(desc);
static const struct sha1_ctx initstate = {
0,
{ SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
@ -41,12 +42,14 @@ static void sha1_init(struct crypto_tfm *tfm)
};
*sctx = initstate;
return 0;
}
static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
static int sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
struct sha1_ctx *sctx = shash_desc_ctx(desc);
unsigned int partial, done;
const u8 *src;
@ -74,13 +77,15 @@ static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
partial = 0;
}
memcpy(sctx->buffer + partial, src, len - done);
return 0;
}
/* Add padding and return the message digest. */
static void sha1_final(struct crypto_tfm *tfm, u8 *out)
static int sha1_final(struct shash_desc *desc, u8 *out)
{
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
struct sha1_ctx *sctx = shash_desc_ctx(desc);
__be32 *dst = (__be32 *)out;
u32 i, index, padlen;
__be64 bits;
@ -91,10 +96,10 @@ static void sha1_final(struct crypto_tfm *tfm, u8 *out)
/* Pad out to 56 mod 64 */
index = sctx->count & 0x3f;
padlen = (index < 56) ? (56 - index) : ((64+56) - index);
sha1_update(tfm, padding, padlen);
sha1_update(desc, padding, padlen);
/* Append length */
sha1_update(tfm, (const u8 *)&bits, sizeof(bits));
sha1_update(desc, (const u8 *)&bits, sizeof(bits));
/* Store state in digest */
for (i = 0; i < 5; i++)
@ -102,32 +107,33 @@ static void sha1_final(struct crypto_tfm *tfm, u8 *out)
/* Wipe context */
memset(sctx, 0, sizeof *sctx);
return 0;
}
static struct crypto_alg alg = {
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_init,
.update = sha1_update,
.final = sha1_final,
.descsize = sizeof(struct sha1_ctx),
.base = {
.cra_name = "sha1",
.cra_driver_name= "sha1-generic",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct sha1_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 3,
.cra_list = LIST_HEAD_INIT(alg.cra_list),
.cra_u = { .digest = {
.dia_digestsize = SHA1_DIGEST_SIZE,
.dia_init = sha1_init,
.dia_update = sha1_update,
.dia_final = sha1_final } }
}
};
static int __init sha1_generic_mod_init(void)
{
return crypto_register_alg(&alg);
return crypto_register_shash(&alg);
}
static void __exit sha1_generic_mod_fini(void)
{
crypto_unregister_alg(&alg);
crypto_unregister_shash(&alg);
}
module_init(sha1_generic_mod_init);