From: Richard Levitte <levitte@openssl.org>
Date: Thu, 27 Jul 2000 21:17:14 +0000 (+0000)
Subject: In the case where a < 0 and |a| < w, the result (assigned to a) from
X-Git-Tag: OpenSSL-engine-0_9_6-beta1~17^2~5
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=8b4e27e26efc097dbe65b0c3cd78a2da7be310ef;p=oweals%2Fopenssl.git

In the case where a < 0 and |a| < w, the result (assigned to a) from
BN_add_word becomes wrongly negative...
This was discovered by Darrel Hankerson <dhankers@cacr.math.uwaterloo.ca>
---

diff --git a/crypto/bn/bn_word.c b/crypto/bn/bn_word.c
index 73157a7d43..7e7ca58842 100644
--- a/crypto/bn/bn_word.c
+++ b/crypto/bn/bn_word.c
@@ -115,7 +115,7 @@ int BN_add_word(BIGNUM *a, BN_ULONG w)
 		a->neg=0;
 		i=BN_sub_word(a,w);
 		if (!BN_is_zero(a))
-			a->neg=1;
+			a->neg=!(a->neg);
 		return(i);
 		}
 	w&=BN_MASK2;