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| author | Stephan Mueller <smueller@chronox.de> | 2015-03-06 08:26:31 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-03-09 21:06:18 +1100 |
| commit | cde001e4c3c3625c60b68a83eb1f1c2572dee07a (patch) | |
| tree | 6b0a069f9fdfa36c3741164564ea163f9cb69820 /crypto/ansi_cprng.c | |
| parent | 4842234f83bfce83c93f84f5972a956ef2c87805 (diff) | |
| download | lwn-cde001e4c3c3625c60b68a83eb1f1c2572dee07a.tar.gz lwn-cde001e4c3c3625c60b68a83eb1f1c2572dee07a.zip | |
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 'crypto/ansi_cprng.c')
| -rw-r--r-- | crypto/ansi_cprng.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/crypto/ansi_cprng.c b/crypto/ansi_cprng.c index 6f5bebc9bf01..765fe7609348 100644 --- a/crypto/ansi_cprng.c +++ b/crypto/ansi_cprng.c @@ -210,7 +210,11 @@ static int get_prng_bytes(char *buf, size_t nbytes, struct prng_context *ctx, byte_count = DEFAULT_BLK_SZ; } - err = byte_count; + /* + * Return 0 in case of success as mandated by the kernel + * crypto API interface definition. + */ + err = 0; dbgprint(KERN_CRIT "getting %d random bytes for context %p\n", byte_count, ctx); |