crypto: rng - Mark crypto_rng_reset seed as const

[linux-beck.git] / crypto / rng.c

diff --git a/crypto/rng.c b/crypto/rng.c
index 4514d3755f7941a416e6b5fbfc66e1e65b6b750c..f1d64948f6fc8037edd0458eb1bd390d64c717d8 100644 (file)
--- 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)
 {