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Commit 2e4fddd8 authored by Herbert Xu's avatar Herbert Xu
Browse files

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: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 70ec7bb9

crypto/shash.c

+7 −0
Original line number Diff line number Diff line
@@ -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");

include/crypto/internal/hash.h

+26 −0
Original line number Diff line number Diff line
@@ -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 */