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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-07 15:17:12 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-08 18:57:10 +0800 |
| commit | 2e4fddd8e420e8f531a34e7a97f9cdb851a6ad13 (patch) | |
| tree | 8f708150f9dca8286a0b6f1d347bda657a3c57a9 | |
| parent | 70ec7bb91ad0d6cce84c8e17f8cbb608dda7b18c (diff) | |
crypto: shash - Add shash_instance
This patch adds shash_instance and the associated alloc/free
functions. This is meant to be an instance that with a shash
algorithm under it. Note that the instance itself doesn't have
to be shash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/shash.c | 7 | ||||
| -rw-r--r-- | include/crypto/internal/hash.h | 26 |
2 files changed, 33 insertions, 0 deletions
diff --git a/crypto/shash.c b/crypto/shash.c index 2ccc8b0076c..8f9d8831e29 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -502,5 +502,12 @@ int crypto_unregister_shash(struct shash_alg *alg) } EXPORT_SYMBOL_GPL(crypto_unregister_shash); +void shash_free_instance(struct crypto_instance *inst) +{ + crypto_drop_spawn(crypto_instance_ctx(inst)); + kfree(shash_instance(inst)); +} +EXPORT_SYMBOL_GPL(shash_free_instance); + MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Synchronous cryptographic hash type"); diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h index 82b70564bca..44d3bcdce6e 100644 --- a/include/crypto/internal/hash.h +++ b/include/crypto/internal/hash.h @@ -34,6 +34,10 @@ struct crypto_hash_walk { unsigned int flags; }; +struct shash_instance { + struct shash_alg alg; +}; + extern const struct crypto_type crypto_ahash_type; int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err); @@ -46,6 +50,8 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc, int crypto_register_shash(struct shash_alg *alg); int crypto_unregister_shash(struct shash_alg *alg); +void shash_free_instance(struct crypto_instance *inst); + static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) { return crypto_tfm_ctx(&tfm->base); @@ -80,5 +86,25 @@ static inline void *crypto_shash_ctx(struct crypto_shash *tfm) return crypto_tfm_ctx(&tfm->base); } +static inline struct crypto_instance *shash_crypto_instance( + struct shash_instance *inst) +{ + return container_of(&inst->alg.base, struct crypto_instance, alg); +} + +static inline struct shash_instance *shash_instance( + struct crypto_instance *inst) +{ + return container_of(__crypto_shash_alg(&inst->alg), + struct shash_instance, alg); +} + +static inline struct shash_instance *shash_alloc_instance( + const char *name, struct crypto_alg *alg) +{ + return crypto_alloc_instance2(name, alg, + sizeof(struct shash_alg) - sizeof(*alg)); +} + #endif /* _CRYPTO_INTERNAL_HASH_H */ |