From 8e05d3eabb1acc24cdc9be7919e305356efacde1 Mon Sep 17 00:00:00 2001
From: nils <nils@c6295689-39f2-0310-b995-f0e70906c6a9>
Date: Mon, 13 Dec 2004 20:58:28 +0000
Subject: [PATCH] do a memcpy only if source and dest are different

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@2009 c6295689-39f2-0310-b995-f0e70906c6a9
---
 src/libopensc/padding.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libopensc/padding.c b/src/libopensc/padding.c
index b9dbd31d..798ae6ef 100644
--- a/src/libopensc/padding.c
+++ b/src/libopensc/padding.c
@@ -225,7 +225,8 @@ int sc_pkcs1_encode(struct sc_context *ctx, unsigned long flags,
 	switch(pad_algo) {
 	case SC_ALGORITHM_RSA_PAD_NONE:
 		/* padding done by card => nothing to do */
-		memcpy(out, tmp, tmp_len);
+		if (out != tmp)
+			memcpy(out, tmp, tmp_len);
 		*out_len = tmp_len;
 		return SC_SUCCESS;
 	case SC_ALGORITHM_RSA_PAD_PKCS1: