Commit 01c2dece authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: ahash - Add instance/spawn support 



This patch adds support for creating ahash instances and using
ahash as spawns.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 88056ec3

crypto/ahash.c

+72 −0
Original line number Diff line number Diff line
@@ -259,5 +259,77 @@ struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, 
}

EXPORT_SYMBOL_GPL(crypto_alloc_ahash);



static int ahash_prepare_alg(struct ahash_alg *alg)

{

	struct crypto_alg *base = &alg->halg.base;



	if (alg->halg.digestsize > PAGE_SIZE / 8 ||

	    alg->halg.statesize > PAGE_SIZE / 8)

		return -EINVAL;



	base->cra_type = &crypto_ahash_type;

	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;

	base->cra_flags |= CRYPTO_ALG_TYPE_AHASH;



	return 0;

}



int crypto_register_ahash(struct ahash_alg *alg)

{

	struct crypto_alg *base = &alg->halg.base;

	int err;



	err = ahash_prepare_alg(alg);

	if (err)

		return err;



	return crypto_register_alg(base);

}

EXPORT_SYMBOL_GPL(crypto_register_ahash);



int crypto_unregister_ahash(struct ahash_alg *alg)

{

	return crypto_unregister_alg(&alg->halg.base);

}

EXPORT_SYMBOL_GPL(crypto_unregister_ahash);



int ahash_register_instance(struct crypto_template *tmpl,

			    struct ahash_instance *inst)

{

	int err;



	err = ahash_prepare_alg(&inst->alg);

	if (err)

		return err;



	return crypto_register_instance(tmpl, ahash_crypto_instance(inst));

}

EXPORT_SYMBOL_GPL(ahash_register_instance);



void ahash_free_instance(struct crypto_instance *inst)

{

	crypto_drop_spawn(crypto_instance_ctx(inst));

	kfree(ahash_instance(inst));

}

EXPORT_SYMBOL_GPL(ahash_free_instance);



int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,

			    struct hash_alg_common *alg,

			    struct crypto_instance *inst)

{

	return crypto_init_spawn2(&spawn->base, &alg->base, inst,

				  &crypto_ahash_type);

}

EXPORT_SYMBOL_GPL(crypto_init_ahash_spawn);



struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask)

{

	struct crypto_alg *alg;



	alg = crypto_attr_alg2(rta, &crypto_ahash_type, type, mask);

	return IS_ERR(alg) ? ERR_CAST(alg) : __crypto_hash_alg_common(alg);

}

EXPORT_SYMBOL_GPL(ahash_attr_alg);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Asynchronous cryptographic hash type");

include/crypto/internal/hash.h

+51 −0
Original line number Diff line number Diff line
@@ -34,10 +34,18 @@ struct crypto_hash_walk { 
	unsigned int flags;

};



struct ahash_instance {

	struct ahash_alg alg;

};



struct shash_instance {

	struct shash_alg alg;

};



struct crypto_ahash_spawn {

	struct crypto_spawn base;

};



struct crypto_shash_spawn {

	struct crypto_spawn base;

};
@@ -53,6 +61,15 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc, 


int crypto_register_ahash(struct ahash_alg *alg);

int crypto_unregister_ahash(struct ahash_alg *alg);

int ahash_register_instance(struct crypto_template *tmpl,

			    struct ahash_instance *inst);

void ahash_free_instance(struct crypto_instance *inst);



int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,

			    struct hash_alg_common *alg,

			    struct crypto_instance *inst);



struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);



int crypto_register_shash(struct shash_alg *alg);

int crypto_unregister_shash(struct shash_alg *alg);
@@ -88,6 +105,40 @@ static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 
	tfm->reqsize = reqsize;

}



static inline struct crypto_instance *ahash_crypto_instance(

	struct ahash_instance *inst)

{

	return container_of(&inst->alg.halg.base, struct crypto_instance, alg);

}



static inline struct ahash_instance *ahash_instance(

	struct crypto_instance *inst)

{

	return container_of(&inst->alg, struct ahash_instance, alg.halg.base);

}



static inline void *ahash_instance_ctx(struct ahash_instance *inst)

{

	return crypto_instance_ctx(ahash_crypto_instance(inst));

}



static inline unsigned int ahash_instance_headroom(void)

{

	return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);

}



static inline struct ahash_instance *ahash_alloc_instance(

	const char *name, struct crypto_alg *alg)

{

	return crypto_alloc_instance2(name, alg, ahash_instance_headroom());

}



static inline struct crypto_ahash *crypto_spawn_ahash(

	struct crypto_ahash_spawn *spawn)

{

	return crypto_spawn_tfm2(&spawn->base);

}



static inline int ahash_enqueue_request(struct crypto_queue *queue,

					     struct ahash_request *request)

{