From: Richard Levitte <levitte@openssl.org>
Date: Thu, 30 May 2002 14:06:06 +0000 (+0000)
Subject: Correct AES counter mode, which incorrectly incremented the counter before
X-Git-Tag: OpenSSL_0_9_6e~26^2~123
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=dbdc5d14d3301ed9dbab16db7e02f3c9518ac3f3

Correct AES counter mode, which incorrectly incremented the counter before
using it.
PR: 56
---

diff --git a/crypto/aes/aes_ctr.c b/crypto/aes/aes_ctr.c
index 8e800481de..aea3db2092 100644
--- a/crypto/aes/aes_ctr.c
+++ b/crypto/aes/aes_ctr.c
@@ -106,8 +106,8 @@ void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
 
 	while (l--) {
 		if (n == 0) {
-			AES_ctr128_inc(counter);
 			AES_encrypt(counter, tmp, key);
+			AES_ctr128_inc(counter);
 		}
 		*(out++) = *(in++) ^ tmp[n];
 		n = (n+1) % AES_BLOCK_SIZE;