From: Richard Levitte <levitte@openssl.org>
Date: Mon, 14 Oct 2002 11:33:32 +0000 (+0000)
Subject: When BN_add_word() reaches top, it shouldn't try to add the the corresponding
X-Git-Tag: OpenSSL_0_9_7-beta4~109^2~15
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e15ea3d9e1e58a4387c7287110d8834f6db5466c;p=oweals%2Fopenssl.git

When BN_add_word() reaches top, it shouldn't try to add the the corresponding
word, since that word may not be zero.
---

diff --git a/crypto/bn/bn_word.c b/crypto/bn/bn_word.c
index cd59baa2c4..988e0ca7b3 100644
--- a/crypto/bn/bn_word.c
+++ b/crypto/bn/bn_word.c
@@ -123,7 +123,10 @@ int BN_add_word(BIGNUM *a, BN_ULONG w)
 	i=0;
 	for (;;)
 		{
-		l=(a->d[i]+(BN_ULONG)w)&BN_MASK2;
+		if (i >= a->top)
+			l=w;
+		else
+			l=(a->d[i]+(BN_ULONG)w)&BN_MASK2;
 		a->d[i]=l;
 		if (w > l)
 			w=1;