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authorStephan Mueller <smueller@chronox.de>2015-03-06 08:26:31 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2015-03-09 21:06:18 +1100
commitcde001e4c3c3625c60b68a83eb1f1c2572dee07a (patch)
tree6b0a069f9fdfa36c3741164564ea163f9cb69820 /include/crypto/rng.h
parent4842234f83bfce83c93f84f5972a956ef2c87805 (diff)
downloadlinux-cde001e4c3c3625c60b68a83eb1f1c2572dee07a.tar.bz2
crypto: rng - RNGs must return 0 in success case
Change the RNGs to always return 0 in success case. This patch ensures that seqiv.c works with RNGs other than krng. seqiv expects that any return code other than 0 is an error. Without the patch, rfc4106(gcm(aes)) will not work when using a DRBG or an ANSI X9.31 RNG. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto/rng.h')
-rw-r--r--include/crypto/rng.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/crypto/rng.h b/include/crypto/rng.h
index a16fb10142bf..6e28ea5be9f1 100644
--- a/include/crypto/rng.h
+++ b/include/crypto/rng.h
@@ -103,8 +103,7 @@ static inline void crypto_free_rng(struct crypto_rng *tfm)
* This function fills the caller-allocated buffer with random numbers using the
* random number generator referenced by the cipher handle.
*
- * Return: > 0 function was successful and returns the number of generated
- * bytes; < 0 if an error occurred
+ * Return: 0 function was successful; < 0 if an error occurred
*/
static inline int crypto_rng_get_bytes(struct crypto_rng *tfm,
u8 *rdata, unsigned int dlen)