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authorLoc Ho <lho@amcc.com>2008-05-14 20:41:47 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-07-10 20:35:13 +0800
commit004a403c2e954734090a69aedc7f4f822bdcc142 (patch)
treee8fadd76113132126e308e01e7cd7cdf6b9d44d6 /crypto/digest.c
parent534fe2c1c3ffbbc3db66dba0783c82d3b345fd33 (diff)
[CRYPTO] hash: Add asynchronous hash support
This patch adds asynchronous hash and digest support. Signed-off-by: Loc Ho <lho@amcc.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/digest.c')
-rw-r--r--crypto/digest.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/crypto/digest.c b/crypto/digest.c
index b526cc348b79..025c9aea24ed 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -157,3 +157,84 @@ int crypto_init_digest_ops(struct crypto_tfm *tfm)
void crypto_exit_digest_ops(struct crypto_tfm *tfm)
{
}
+
+static int digest_async_nosetkey(struct crypto_ahash *tfm_async, const u8 *key,
+ unsigned int keylen)
+{
+ crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
+ return -ENOSYS;
+}
+
+static int digest_async_setkey(struct crypto_ahash *tfm_async, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ahash_tfm(tfm_async);
+ struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
+
+ crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
+ return dalg->dia_setkey(tfm, key, keylen);
+}
+
+static int digest_async_init(struct ahash_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
+
+ dalg->dia_init(tfm);
+ return 0;
+}
+
+static int digest_async_update(struct ahash_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct hash_desc desc = {
+ .tfm = __crypto_hash_cast(tfm),
+ .flags = req->base.flags,
+ };
+
+ update(&desc, req->src, req->nbytes);
+ return 0;
+}
+
+static int digest_async_final(struct ahash_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct hash_desc desc = {
+ .tfm = __crypto_hash_cast(tfm),
+ .flags = req->base.flags,
+ };
+
+ final(&desc, req->result);
+ return 0;
+}
+
+static int digest_async_digest(struct ahash_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct hash_desc desc = {
+ .tfm = __crypto_hash_cast(tfm),
+ .flags = req->base.flags,
+ };
+
+ return digest(&desc, req->src, req->nbytes, req->result);
+}
+
+int crypto_init_digest_ops_async(struct crypto_tfm *tfm)
+{
+ struct ahash_tfm *crt = &tfm->crt_ahash;
+ struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
+
+ if (dalg->dia_digestsize > crypto_tfm_alg_blocksize(tfm))
+ return -EINVAL;
+
+ crt->init = digest_async_init;
+ crt->update = digest_async_update;
+ crt->final = digest_async_final;
+ crt->digest = digest_async_digest;
+ crt->setkey = dalg->dia_setkey ? digest_async_setkey :
+ digest_async_nosetkey;
+ crt->digestsize = dalg->dia_digestsize;
+ crt->base = __crypto_ahash_cast(tfm);
+
+ return 0;
+}