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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2015-04-20 13:39:04 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-04-21 10:19:58 +0800 |
| commit | ff030b099a21a4753af575b4304249e88400e506 (patch) | |
| tree | f54046623574ff38c4da038d3eff37837978aec6 /crypto/rng.c | |
| parent | d0e83059a6c9b04f00264a74b8f6439948de4613 (diff) | |
| download | lwn-ff030b099a21a4753af575b4304249e88400e506.tar.gz lwn-ff030b099a21a4753af575b4304249e88400e506.zip | |
crypto: rng - Introduce crypto_rng_generate
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>
Diffstat (limited to 'crypto/rng.c')
| -rw-r--r-- | crypto/rng.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/crypto/rng.c b/crypto/rng.c index 87fa2f4933b0..4514d3755f79 100644 --- a/crypto/rng.c +++ b/crypto/rng.c @@ -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; |