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Commit 881cd6c5 authored by Herbert Xu's avatar Herbert Xu
Browse files

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: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7ca99d81

crypto/rng.c

+29 −0
Original line number Diff line number Diff line
@@ -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");

include/crypto/internal/rng.h

+2 −0
Original line number Diff line number Diff line
@@ -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)

{