From: Stephan Mueller <smuel...@chronox.de>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit cde001e4c3c3625c60b68a83eb1f1c2572dee07a upstream.
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 <smuel...@chronox.de>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
crypto/ansi_cprng.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
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);
--
2.4.2
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