From 9ceb9a7228cd6d5796a78e4cced9d5fac358e3a9 Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Wed, 17 Sep 2014 16:24:13 -0400
Subject: [PATCH] don't write beyond out buffer

---
 base64.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/base64.cpp b/base64.cpp
index 62ef7892..4c72c0c6 100644
--- a/base64.cpp
+++ b/base64.cpp
@@ -166,18 +166,21 @@ namespace data
 		ps = (unsigned char *)InBuffer;
 		
 		if (outCount > len) return -1;
-		pd = (unsigned char *)OutBuffer;
+		pd = OutBuffer;
+		auto endOfOutBuffer = OutBuffer + outCount;		
 		for ( i = 0; i < n; i++ ){
 		     acc_1 = iT64[*ps++];
 		     acc_2 = iT64[*ps++];
 		     acc_1 <<= 2;
 		     acc_1 |= acc_2>>4;
 		     *pd++  = acc_1;
+			 if (pd >= endOfOutBuffer) break;
 
 		     acc_2 <<= 4;
 		     acc_1 = iT64[*ps++];
 		     acc_2 |= acc_1 >> 2;
 		     *pd++ = acc_2;
+			  if (pd >= endOfOutBuffer) break;	
 
 		     acc_2 = iT64[*ps++];
 		     acc_2 |= acc_1 << 6;