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crypto: md5 - Switch to shash

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This patch changes md5 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 2008-12-03 19:57:12 +08:00 committed by Herbert Xu
parent 808a1763ce
commit 14b75ba70d
2 changed files with 29 additions and 23 deletions
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2
crypto/Kconfig
View file

@ -282,7 +282,7 @@ config CRYPTO_MD4
config CRYPTO_MD5
tristate "MD5 digest algorithm"
select CRYPTO_ALGAPI
select CRYPTO_HASH
help
MD5 message digest algorithm (RFC1321).

50
crypto/md5.c
View file

@ -15,10 +15,10 @@
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <linux/types.h>
#include <asm/byteorder.h>
@ -147,20 +147,22 @@ static inline void md5_transform_helper(struct md5_ctx *ctx)
md5_transform(ctx->hash, ctx->block);
}
static void md5_init(struct crypto_tfm *tfm)
static int md5_init(struct shash_desc *desc)
{
struct md5_ctx *mctx = crypto_tfm_ctx(tfm);
struct md5_ctx *mctx = shash_desc_ctx(desc);
mctx->hash[0] = 0x67452301;
mctx->hash[1] = 0xefcdab89;
mctx->hash[2] = 0x98badcfe;
mctx->hash[3] = 0x10325476;
mctx->byte_count = 0;
return 0;
}
static void md5_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
static int md5_update(struct shash_desc *desc, const u8 *data, unsigned int len)
{
struct md5_ctx *mctx = crypto_tfm_ctx(tfm);
struct md5_ctx *mctx = shash_desc_ctx(desc);
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
mctx->byte_count += len;
@ -168,7 +170,7 @@ static void md5_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
if (avail > len) {
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
data, len);
return;
return 0;
}
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
@ -186,11 +188,13 @@ static void md5_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
}
memcpy(mctx->block, data, len);
return 0;
}
static void md5_final(struct crypto_tfm *tfm, u8 *out)
static int md5_final(struct shash_desc *desc, u8 *out)
{
struct md5_ctx *mctx = crypto_tfm_ctx(tfm);
struct md5_ctx *mctx = shash_desc_ctx(desc);
const unsigned int offset = mctx->byte_count & 0x3f;
char *p = (char *)mctx->block + offset;
int padding = 56 - (offset + 1);
@ -212,30 +216,32 @@ static void md5_final(struct crypto_tfm *tfm, u8 *out)
cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
memcpy(out, mctx->hash, sizeof(mctx->hash));
memset(mctx, 0, sizeof(*mctx));
return 0;
}
static struct crypto_alg alg = {
.cra_name = "md5",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct md5_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(alg.cra_list),
.cra_u = { .digest = {
.dia_digestsize = MD5_DIGEST_SIZE,
.dia_init = md5_init,
.dia_update = md5_update,
.dia_final = md5_final } }
static struct shash_alg alg = {
.digestsize = MD5_DIGEST_SIZE,
.init = md5_init,
.update = md5_update,
.final = md5_final,
.descsize = sizeof(struct md5_ctx),
.base = {
.cra_name = "md5",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init md5_mod_init(void)
{
return crypto_register_alg(&alg);
return crypto_register_shash(&alg);
}
static void __exit md5_mod_fini(void)
{
crypto_unregister_alg(&alg);
crypto_unregister_shash(&alg);
}
module_init(md5_mod_init);