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authorJan Glauber <jang@linux.vnet.ibm.com>2008-03-06 19:50:20 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-04-21 10:19:11 +0800
commit604973f1fe41b817c1badb3df2008fe641e50ae6 (patch)
treedca1cf2234a9d8178e45952f4ff0e95f386def5c /arch/s390/crypto/sha1_s390.c
parent607424d8583365418a337aa51e83403c8bd213ed (diff)
[CRYPTO] s390: Generic sha_update and sha_final
The sha_{update|final} functions are similar for every sha variant. Since that is error-prone and redundant replace these functions by a shared generic implementation for s390. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/s390/crypto/sha1_s390.c')
-rw-r--r--arch/s390/crypto/sha1_s390.c91
1 files changed, 6 insertions, 85 deletions
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
index 9cf9eca2274..b3cb5a89b00 100644
--- a/arch/s390/crypto/sha1_s390.c
+++ b/arch/s390/crypto/sha1_s390.c
@@ -29,16 +29,11 @@
#include <crypto/sha.h>
#include "crypt_s390.h"
-
-struct s390_sha1_ctx {
- u64 count; /* message length */
- u32 state[5];
- u8 buf[2 * SHA1_BLOCK_SIZE];
-};
+#include "sha.h"
static void sha1_init(struct crypto_tfm *tfm)
{
- struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);
+ struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);
sctx->state[0] = SHA1_H0;
sctx->state[1] = SHA1_H1;
@@ -46,79 +41,7 @@ static void sha1_init(struct crypto_tfm *tfm)
sctx->state[3] = SHA1_H3;
sctx->state[4] = SHA1_H4;
sctx->count = 0;
-}
-
-static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
- unsigned int len)
-{
- struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);
- unsigned int index;
- int ret;
-
- /* how much is already in the buffer? */
- index = sctx->count & 0x3f;
-
- sctx->count += len;
-
- if (index + len < SHA1_BLOCK_SIZE)
- goto store;
-
- /* process one stored block */
- if (index) {
- memcpy(sctx->buf + index, data, SHA1_BLOCK_SIZE - index);
- ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buf,
- SHA1_BLOCK_SIZE);
- BUG_ON(ret != SHA1_BLOCK_SIZE);
- data += SHA1_BLOCK_SIZE - index;
- len -= SHA1_BLOCK_SIZE - index;
- }
-
- /* process as many blocks as possible */
- if (len >= SHA1_BLOCK_SIZE) {
- ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, data,
- len & ~(SHA1_BLOCK_SIZE - 1));
- BUG_ON(ret != (len & ~(SHA1_BLOCK_SIZE - 1)));
- data += ret;
- len -= ret;
- }
-
-store:
- /* anything left? */
- if (len)
- memcpy(sctx->buf + index , data, len);
-}
-
-/* Add padding and return the message digest. */
-static void sha1_final(struct crypto_tfm *tfm, u8 *out)
-{
- struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);
- u64 bits;
- unsigned int index, end;
- int ret;
-
- /* must perform manual padding */
- index = sctx->count & 0x3f;
- end = (index < 56) ? SHA1_BLOCK_SIZE : (2 * SHA1_BLOCK_SIZE);
-
- /* start pad with 1 */
- sctx->buf[index] = 0x80;
-
- /* pad with zeros */
- index++;
- memset(sctx->buf + index, 0x00, end - index - 8);
-
- /* append message length */
- bits = sctx->count * 8;
- memcpy(sctx->buf + end - 8, &bits, sizeof(bits));
-
- ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buf, end);
- BUG_ON(ret != end);
-
- /* copy digest to out */
- memcpy(out, sctx->state, SHA1_DIGEST_SIZE);
-
- /* wipe context */
- memset(sctx, 0, sizeof *sctx);
+ sctx->func = KIMD_SHA_1;
}
static struct crypto_alg alg = {
@@ -127,21 +50,20 @@ static struct crypto_alg alg = {
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct s390_sha1_ctx),
+ .cra_ctxsize = sizeof(struct s390_sha_ctx),
.cra_module = THIS_MODULE,
.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 } }
+ .dia_update = s390_sha_update,
+ .dia_final = s390_sha_final } }
};
static int __init sha1_s390_init(void)
{
if (!crypt_s390_func_available(KIMD_SHA_1))
return -EOPNOTSUPP;
-
return crypto_register_alg(&alg);
}
@@ -154,6 +76,5 @@ module_init(sha1_s390_init);
module_exit(sha1_s390_fini);
MODULE_ALIAS("sha1");
-
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");