@@ -136,10 +136,23 @@
 
 	[self OF_resetState];
 
 	return self;
 }
+
+- copy
+{
+	OFMD5Hash *copy = [[OFMD5Hash alloc] init];
+
+	memcpy(copy->_state, _state, sizeof(_state));
+	copy->_bits = _bits;
+	memcpy(&copy->_buffer, &_buffer, sizeof(_buffer));
+	copy->_bufferLength = _bufferLength;
+	copy->_calculated = _calculated;
+
+	return copy;
+}
 
 - (void)OF_resetState
 {
 	_state[0] = 0x67452301;
 	_state[1] = 0xEFCDAB89;