diff -r e7a09ceb4505 -r 3874575d924d sources/mystring.cpp
--- a/sources/mystring.cpp	Thu Dec 11 16:17:35 2014 +0200
+++ b/sources/mystring.cpp	Fri Dec 12 00:55:51 2014 +0200
@@ -32,6 +32,7 @@
 #include "main.h"
 #include "mystring.h"
 #include "format.h"
+#include "md5.h"
 
 // -------------------------------------------------------------------------------------------------
 //
@@ -477,3 +478,14 @@
 	::sprintf (buf, "%f", a);
 	return String (buf);
 }
+
+// -------------------------------------------------------------------------------------------------
+//
+METHOD
+String::md5() const -> String
+{
+	char checksum[33];
+	CalculateMD5 (reinterpret_cast<const unsigned char*> (chars()), length(), checksum);
+	checksum[sizeof checksum - 1] = '\0';
+	return String (checksum);
+}