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crypto: ahash - Add instance/spawn support 

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

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-07-14 14:06:06 +08:00
parent 88056ec346
commit 01c2dece43
2 changed files with 123 additions and 0 deletions
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72
crypto/ahash.c
View File

@ -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");

51
include/crypto/internal/hash.h
View File

@ -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)
{