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crypto: rng - Introduce crypto_rng_generate

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This patch adds the new top-level function crypto_rng_generate
which generates random numbers with additional input.  It also
extends the mid-level rng_gen_random function to take additional
data as input.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2015-04-20 13:39:04 +08:00
parent d0e83059a6
commit ff030b099a
2 changed files with 32 additions and 4 deletions
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9
crypto/rng.c
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@@ -36,6 +36,12 @@ static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm)
return container_of(tfm, struct crypto_rng, base);
}
static int generate(struct crypto_rng *tfm, const u8 *src, unsigned int slen,
u8 *dst, unsigned int dlen)
{
return crypto_rng_alg(tfm)->rng_make_random(tfm, dst, dlen);
}
static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
{
u8 *buf = NULL;
@@ -59,9 +65,8 @@ static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
static int crypto_rng_init_tfm(struct crypto_tfm *tfm)
{
struct crypto_rng *rng = __crypto_rng_cast(tfm);
struct rng_alg *alg = &tfm->__crt_alg->cra_rng;
rng->generate = alg->rng_make_random;
rng->generate = generate;
rng->seed = rngapi_reset;
return 0;