From 84a9c938e5063709f799fd6bab17a8ea723c2eb5 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 2 Jan 2020 19:58:50 -0800 Subject: crypto: ahash - introduce crypto_grab_ahash() Currently, ahash spawns are initialized by using ahash_attr_alg() or crypto_find_alg() to look up the ahash algorithm, then calling crypto_init_ahash_spawn(). This is different from how skcipher, aead, and akcipher spawns are initialized (they use crypto_grab_*()), and for no good reason. This difference introduces unnecessary complexity. The crypto_grab_*() functions used to have some problems, like not holding a reference to the algorithm and requiring the caller to initialize spawn->base.inst. But those problems are fixed now. So, let's introduce crypto_grab_ahash() so that we can convert all templates to the same way of initializing their spawns. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu --- crypto/ahash.c | 9 +++++++++ include/crypto/internal/hash.h | 10 ++++++++++ 2 files changed, 19 insertions(+) diff --git a/crypto/ahash.c b/crypto/ahash.c index 181bd851b429..e98a1398ed7f 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -556,6 +556,15 @@ const struct crypto_type crypto_ahash_type = { }; EXPORT_SYMBOL_GPL(crypto_ahash_type); +int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask) +{ + spawn->base.frontend = &crypto_ahash_type; + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_grab_ahash); + struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, u32 mask) { diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h index 4d1a0d8e4f3a..e1024fa0032f 100644 --- a/include/crypto/internal/hash.h +++ b/include/crypto/internal/hash.h @@ -109,11 +109,21 @@ int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, struct hash_alg_common *alg, struct crypto_instance *inst); +int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask); + static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) { crypto_drop_spawn(&spawn->base); } +static inline struct hash_alg_common *crypto_spawn_ahash_alg( + struct crypto_ahash_spawn *spawn) +{ + return __crypto_hash_alg_common(spawn->base.alg); +} + struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); int crypto_register_shash(struct shash_alg *alg); -- cgit v1.2.3