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[CRYPTO] api: Add crypto_attr_alg_name

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This patch adds a new helper crypto_attr_alg_name which is basically the
first half of crypto_attr_alg.  That is, it returns an algorithm name
parameter as a string without looking it up.  The caller can then look it
up immediately or defer it until later.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2007-12-07 20:18:17 +08:00
parent 551a09a7a9
commit 68b6c7d691
2 changed files with 17 additions and 2 deletions
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18
crypto/algapi.c
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@ -472,7 +472,7 @@ int crypto_check_attr_type(struct rtattr **tb, u32 type)
} }
EXPORT_SYMBOL_GPL(crypto_check_attr_type); EXPORT_SYMBOL_GPL(crypto_check_attr_type);
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask) const char *crypto_attr_alg_name(struct rtattr *rta)
{ {
struct crypto_attr_alg *alga; struct crypto_attr_alg *alga;
@ -486,7 +486,21 @@ struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
alga = RTA_DATA(rta); alga = RTA_DATA(rta);
alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
return crypto_alg_mod_lookup(alga->name, type, mask); return alga->name;
}
EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
{
const char *name;
int err;
name = crypto_attr_alg_name(rta);
err = PTR_ERR(name);
if (IS_ERR(name))
return ERR_PTR(err);
return crypto_alg_mod_lookup(name, type, mask);
} }
EXPORT_SYMBOL_GPL(crypto_attr_alg); EXPORT_SYMBOL_GPL(crypto_attr_alg);

1
include/crypto/algapi.h
View file

@ -113,6 +113,7 @@ struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type); int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta);
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask); struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask);
int crypto_attr_u32(struct rtattr *rta, u32 *num); int crypto_attr_u32(struct rtattr *rta, u32 *num);
struct crypto_instance *crypto_alloc_instance(const char *name, struct crypto_instance *crypto_alloc_instance(const char *name,