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 <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
diff --git a/crypto/ansi_cprng.c b/crypto/ansi_cprng.c
index 6f5bebc..765fe76 100644
--- a/crypto/ansi_cprng.c
+++ b/crypto/ansi_cprng.c
@@ -210,7 +210,11 @@
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);
