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authorHuang Ying <ying.huang@intel.com>2009-08-06 01:35:20 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2009-08-06 01:35:20 -0400
commitace1366369841c9c3a9788f79baa4d73f1c53107 (patch)
tree65d07ad456082a0e62a1d70fa91403c10d468e27 /crypto
parent9382d97af586a47dad312765e35c61aa7ad7fcdd (diff)
crypto: cryptd - Add support to access underlaying shash
cryptd_alloc_ahash() will allocate a cryptd-ed ahash for specified algorithm name. The new allocated one is guaranteed to be cryptd-ed ahash, so the shash underlying can be gotten via cryptd_ahash_child(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/cryptd.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 2eb705822f2b..35335825a4ef 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -682,6 +682,41 @@ void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
682} 682}
683EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); 683EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
684 684
685struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
686 u32 type, u32 mask)
687{
688 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
689 struct crypto_ahash *tfm;
690
691 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
692 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
693 return ERR_PTR(-EINVAL);
694 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
695 if (IS_ERR(tfm))
696 return ERR_CAST(tfm);
697 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
698 crypto_free_ahash(tfm);
699 return ERR_PTR(-EINVAL);
700 }
701
702 return __cryptd_ahash_cast(tfm);
703}
704EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
705
706struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
707{
708 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
709
710 return ctx->child;
711}
712EXPORT_SYMBOL_GPL(cryptd_ahash_child);
713
714void cryptd_free_ahash(struct cryptd_ahash *tfm)
715{
716 crypto_free_ahash(&tfm->base);
717}
718EXPORT_SYMBOL_GPL(cryptd_free_ahash);
719
685static int __init cryptd_init(void) 720static int __init cryptd_init(void)
686{ 721{
687 int err; 722 int err;