From: Bodo Möller <bodo@openssl.org>
Date: Thu, 25 Jul 2002 12:14:41 +0000 (+0000)
Subject: Add bn_dup_expand() comment from the main branch explaining that
X-Git-Tag: OpenSSL_0_9_7-beta3~6
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=6178bb8fe9a1754aa34c2c8c62f6c85edd64b872;p=oweals%2Fopenssl.git

Add bn_dup_expand() comment from the main branch explaining that
bn_dup_expand() is broken.

[No need to fix this in 0.9.7-stable, it is just an unused internal
function.]
---

diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c
index a016cb7f53..8abe095af2 100644
--- a/crypto/bn/bn_lib.c
+++ b/crypto/bn/bn_lib.c
@@ -397,6 +397,12 @@ BIGNUM *bn_dup_expand(const BIGNUM *b, int words)
 	{
 	BIGNUM *r = NULL;
 
+	/* This function does not work if
+	 *      words <= b->dmax && top < words
+	 * because BN_dup() does not preserve 'dmax'!
+	 * (But bn_dup_expand() is not used anywhere yet.)
+	 */
+	
 	if (words > b->dmax)
 		{
 		BN_ULONG *a = bn_expand_internal(b, words);