COMMON: Guard Blowfish buffer padding against overrun

This fixes Coverity Scan issue #173470.
xoreos · Dec 25, 2016 · a834f1f · a834f1f
1 parent 57af082
commit a834f1f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/common/blowfish.cpp b/src/common/blowfish.cpp
@@ -355,7 +355,8 @@ MemoryReadStream *blowfishEBC(SeekableReadStream &input, const std::vector<byte>
 		if (input.read(buffer, toRead) != toRead)
 			throw Exception(kReadError);
 
-		std::memset(buffer + toRead, 0, kBlockSize - toRead);
+		if (toRead < kBlockSize)
+			std::memset(buffer + toRead, 0, kBlockSize - toRead);
 
 		blowfishECB(ctx, mode, buffer, data);