diff options
| -rw-r--r-- | crypto/rng.c | 27 | ||||
| -rw-r--r-- | include/crypto/rng.h | 9 |
2 files changed, 28 insertions, 8 deletions
diff --git a/crypto/rng.c b/crypto/rng.c index 4514d3755f79..f1d64948f6fc 100644 --- a/crypto/rng.c +++ b/crypto/rng.c @@ -42,7 +42,29 @@ static int generate(struct crypto_rng *tfm, const u8 *src, unsigned int slen, return crypto_rng_alg(tfm)->rng_make_random(tfm, dst, dlen); } -static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) +static int rngapi_reset(struct crypto_rng *tfm, const u8 *seed, + unsigned int slen) +{ + u8 *buf = NULL; + u8 *src = (u8 *)seed; + int err; + + if (slen) { + buf = kmalloc(slen, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy(buf, seed, slen); + src = buf; + } + + err = crypto_rng_alg(tfm)->rng_reset(tfm, src, slen); + + kzfree(buf); + return err; +} + +int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen) { u8 *buf = NULL; int err; @@ -56,11 +78,12 @@ static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) seed = buf; } - err = crypto_rng_alg(tfm)->rng_reset(tfm, seed, slen); + err = tfm->seed(tfm, seed, slen); kfree(buf); return err; } +EXPORT_SYMBOL_GPL(crypto_rng_reset); static int crypto_rng_init_tfm(struct crypto_tfm *tfm) { diff --git a/include/crypto/rng.h b/include/crypto/rng.h index f20f068154bc..7fca37144b59 100644 --- a/include/crypto/rng.h +++ b/include/crypto/rng.h @@ -19,7 +19,7 @@ struct crypto_rng { int (*generate)(struct crypto_rng *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int dlen); - int (*seed)(struct crypto_rng *tfm, u8 *seed, unsigned int slen); + int (*seed)(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); struct crypto_tfm base; }; @@ -139,11 +139,8 @@ static inline int crypto_rng_get_bytes(struct crypto_rng *tfm, * * Return: 0 if the setting of the key was successful; < 0 if an error occurred */ -static inline int crypto_rng_reset(struct crypto_rng *tfm, - u8 *seed, unsigned int slen) -{ - return tfm->seed(tfm, seed, slen); -} +int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, + unsigned int slen); /** * crypto_rng_seedsize() - obtain seed size of RNG |
