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crypto: rng - Add multiple algorithm registration interface 

This patch adds the helpers that allow the registration and removal
of multiple RNG algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2015-04-21 10:46:40 +08:00
parent 7ca99d8148
commit 881cd6c570
2 changed files with 31 additions and 0 deletions
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29
crypto/rng.c
View File

@ -233,5 +233,34 @@ void crypto_unregister_rng(struct rng_alg *alg)
}
EXPORT_SYMBOL_GPL(crypto_unregister_rng);
int crypto_register_rngs(struct rng_alg *algs, int count)
{
int i, ret;
for (i = 0; i < count; i++) {
ret = crypto_register_rng(algs + i);
if (ret)
goto err;
}
return 0;
err:
for (--i; i >= 0; --i)
crypto_unregister_rng(algs + i);
return ret;
}
EXPORT_SYMBOL_GPL(crypto_register_rngs);
void crypto_unregister_rngs(struct rng_alg *algs, int count)
{
int i;
for (i = count - 1; i >= 0; --i)
crypto_unregister_rng(algs + i);
}
EXPORT_SYMBOL_GPL(crypto_unregister_rngs);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Random Number Generator");

2
include/crypto/internal/rng.h
View File

@ -20,6 +20,8 @@ extern const struct crypto_type crypto_rng_type;
int crypto_register_rng(struct rng_alg *alg);
void crypto_unregister_rng(struct rng_alg *alg);
int crypto_register_rngs(struct rng_alg *algs, int count);
void crypto_unregister_rngs(struct rng_alg *algs, int count);
static inline void *crypto_rng_ctx(struct crypto_rng *tfm)
{