crypto: rng - Introduce crypto_rng_generate

[firefly-linux-kernel-4.4.55.git] / crypto / rng.c

diff --git a/crypto/rng.c b/crypto/rng.c
index 87fa2f4933b0555d6059b1a516fa079c77e6eebf..4514d3755f7941a416e6b5fbfc66e1e65b6b750c 100644 (file)
--- 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;