diff --git a/common/rfb/Password.cxx b/common/rfb/Password.cxx
new file mode 100644
index 0000000..9127862
--- /dev/null
+++ b/common/rfb/Password.cxx
@@ -0,0 +1,77 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// XXX not thread-safe, because d3des isn't - do we need to worry about this?
+//
+
+#include <string.h>
+extern "C" {
+#include <rfb/d3des.h>
+}
+#include <rdr/types.h>
+#include <rdr/Exception.h>
+#include <rfb/Password.h>
+
+using namespace rfb;
+
+static unsigned char d3desObfuscationKey[] = {23,82,107,6,35,78,88,7};
+
+
+PlainPasswd::PlainPasswd() {}
+
+PlainPasswd::PlainPasswd(char* pwd) : CharArray(pwd) {
+}
+
+PlainPasswd::PlainPasswd(const ObfuscatedPasswd& obfPwd) : CharArray(9) {
+  if (obfPwd.length < 8)
+    throw rdr::Exception("bad obfuscated password length");
+  deskey(d3desObfuscationKey, DE1);
+  des((rdr::U8*)obfPwd.buf, (rdr::U8*)buf);
+  buf[8] = 0;
+}
+
+PlainPasswd::~PlainPasswd() {
+  replaceBuf(0);
+}
+
+void PlainPasswd::replaceBuf(char* b) {
+  if (buf)
+    memset(buf, 0, strlen(buf));
+  CharArray::replaceBuf(b);
+}
+
+
+ObfuscatedPasswd::ObfuscatedPasswd() : length(0) {
+}
+
+ObfuscatedPasswd::ObfuscatedPasswd(int len) : CharArray(len), length(len) {
+}
+
+ObfuscatedPasswd::ObfuscatedPasswd(const PlainPasswd& plainPwd) : CharArray(8), length(8) {
+  int l = strlen(plainPwd.buf), i;
+  for (i=0; i<8; i++)
+    buf[i] = i<l ? plainPwd.buf[i] : 0;
+  deskey(d3desObfuscationKey, EN0);
+  des((rdr::U8*)buf, (rdr::U8*)buf);
+}
+
+ObfuscatedPasswd::~ObfuscatedPasswd() {
+  if (buf)
+    memset(buf, 0, length);
+}