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ANDROID: crypto: shash - Add crypto_grab_shash() and crypto_spawn_shash_alg()

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Analogous to crypto_grab_skcipher() and crypto_spawn_skcipher_alg(),
these are useful for algorithms that need to use a shash sub-algorithm,
possibly in addition to other sub-algorithms.

Bug: 32975945
Signed-off-by: Eric Biggers <ebiggers@google.com>
Change-Id: I44e5a519d73f5f839e3b6ecbf8c66e36ec569557
This commit is contained in:
Eric Biggers
2017-01-10 16:47:49 -08:00
parent 93867d9bc5
commit c8bb10b1ee
2 changed files with 16 additions and 0 deletions
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8
crypto/shash.c
View File

@@ -682,6 +682,14 @@ void shash_free_instance(struct crypto_instance *inst)
}
EXPORT_SYMBOL_GPL(shash_free_instance);
int crypto_grab_shash(struct crypto_shash_spawn *spawn,
const char *name, u32 type, u32 mask)
{
spawn->base.frontend = &crypto_shash_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_shash);
int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
struct shash_alg *alg,
struct crypto_instance *inst)

8
include/crypto/internal/hash.h
View File

@@ -102,6 +102,8 @@ int shash_register_instance(struct crypto_template *tmpl,
struct shash_instance *inst);
void shash_free_instance(struct crypto_instance *inst);
int crypto_grab_shash(struct crypto_shash_spawn *spawn,
const char *name, u32 type, u32 mask);
int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
struct shash_alg *alg,
struct crypto_instance *inst);
@@ -111,6 +113,12 @@ static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
crypto_drop_spawn(&spawn->base);
}
static inline struct shash_alg *crypto_spawn_shash_alg(
struct crypto_shash_spawn *spawn)
{
return container_of(spawn->base.alg, struct shash_alg, base);
}
struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);