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[CRYPTO] digest: Added user API for new hash type

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The existing digest user interface is inadequate for support asynchronous
operations.  For one it doesn't return a value to indicate success or
failure, nor does it take a per-operation descriptor which is essential
for the issuing of requests while other requests are still outstanding.

This patch is the first in a series of steps to remodel the interface
for asynchronous operations.

For the ease of transition the new interface will be known as "hash"
while the old one will remain as "digest".

This patch also changes sg_next to allow chaining.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2006-08-19 22:24:23 +10:00
parent 7226bc877a
commit 055bcee310
8 changed files with 326 additions and 75 deletions
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12
crypto/hmac.c
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@@ -35,9 +35,9 @@ int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
BUG_ON(!crypto_tfm_alg_blocksize(tfm));
tfm->crt_digest.dit_hmac_block = kmalloc(crypto_tfm_alg_blocksize(tfm),
GFP_KERNEL);
if (tfm->crt_digest.dit_hmac_block == NULL)
tfm->crt_hash.hmac_block = kmalloc(crypto_tfm_alg_blocksize(tfm),
GFP_KERNEL);
if (tfm->crt_hash.hmac_block == NULL)
ret = -ENOMEM;
return ret;
@@ -46,14 +46,14 @@ int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
void crypto_free_hmac_block(struct crypto_tfm *tfm)
{
kfree(tfm->crt_digest.dit_hmac_block);
kfree(tfm->crt_hash.hmac_block);
}
void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen)
{
unsigned int i;
struct scatterlist tmp;
char *ipad = tfm->crt_digest.dit_hmac_block;
char *ipad = tfm->crt_hash.hmac_block;
if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
hash_key(tfm, key, *keylen);
@@ -83,7 +83,7 @@ void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
{
unsigned int i;
struct scatterlist tmp;
char *opad = tfm->crt_digest.dit_hmac_block;
char *opad = tfm->crt_hash.hmac_block;
if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
hash_key(tfm, key, *keylen);