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crypto: shash - Add shash_register_instance

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This patch adds shash_register_instance so that shash instances
can be registered without bypassing the shash checks applied to
normal algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-07-08 18:46:23 +08:00
parent 7d6f56400a
commit 619a6ebd25
2 changed files with 27 additions and 2 deletions
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26
crypto/shash.c
View file

@ -480,7 +480,7 @@ struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
} }
EXPORT_SYMBOL_GPL(crypto_alloc_shash); EXPORT_SYMBOL_GPL(crypto_alloc_shash);
int crypto_register_shash(struct shash_alg *alg) static int shash_prepare_alg(struct shash_alg *alg)
{ {
struct crypto_alg *base = &alg->base; struct crypto_alg *base = &alg->base;
@ -491,6 +491,17 @@ int crypto_register_shash(struct shash_alg *alg)
base->cra_type = &crypto_shash_type; base->cra_type = &crypto_shash_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; base->cra_flags |= CRYPTO_ALG_TYPE_SHASH;
return 0;
}
int crypto_register_shash(struct shash_alg *alg)
{
struct crypto_alg *base = &alg->base;
int err;
err = shash_prepare_alg(alg);
if (err)
return err;
return crypto_register_alg(base); return crypto_register_alg(base);
} }
@ -502,6 +513,19 @@ int crypto_unregister_shash(struct shash_alg *alg)
} }
EXPORT_SYMBOL_GPL(crypto_unregister_shash); EXPORT_SYMBOL_GPL(crypto_unregister_shash);
int shash_register_instance(struct crypto_template *tmpl,
struct shash_instance *inst)
{
int err;
err = shash_prepare_alg(&inst->alg);
if (err)
return err;
return crypto_register_instance(tmpl, shash_crypto_instance(inst));
}
EXPORT_SYMBOL_GPL(shash_register_instance);
void shash_free_instance(struct crypto_instance *inst) void shash_free_instance(struct crypto_instance *inst)
{ {
crypto_drop_spawn(crypto_instance_ctx(inst)); crypto_drop_spawn(crypto_instance_ctx(inst));

3
include/crypto/internal/hash.h
View file

@ -53,7 +53,8 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
int crypto_register_shash(struct shash_alg *alg); int crypto_register_shash(struct shash_alg *alg);
int crypto_unregister_shash(struct shash_alg *alg); int crypto_unregister_shash(struct shash_alg *alg);
int shash_register_instance(struct crypto_template *tmpl,
struct shash_instance *inst);
void shash_free_instance(struct crypto_instance *inst); void shash_free_instance(struct crypto_instance *inst);
int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,