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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2009 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#ifndef Auth_H
#define Auth_H
#include "Timestamp.h"
//
// Handle the forwarding of authorization credentials
// to the X server by replacing the fake cookie with
// the real cookie as it is read from the auth file.
// At the moment only the MIT-MAGIC-COOKIE-1 cookies
// are recognized. The implementation is based on the
// corresponding code found in the SSH client.
//
class Auth
{
public:
//
// Must be created by passing the fake cookie that
// will be forwarded by the remote end and with the
// real X display that is going to be used for the
// session.
//
Auth(char *display, char *cookie);
~Auth();
int isValid()
{
return (isTimestamp(last_) == 1 && fakeCookie_ != NULL &&
*fakeCookie_ != '\0' && realCookie_ != NULL &&
*realCookie_ != '\0' && fakeData_ != NULL &&
realData_ != NULL && dataSize_ != 0);
}
int isFake() const
{
return generatedCookie_;
}
//
// Method called in the channel class to find if the
// provided cookie matches the fake one. If the data
// matches, the fake cookie is replaced with the real
// one.
//
int checkCookie(unsigned char *buffer);
protected:
//
// Update the real cookie for the display. If called
// a further time, check if the auth file is changed
// and get the new cookie.
//
int updateCookie();
//
// Find out which authorization file is to be used
// and query the cookie for the current display.
//
int getCookie();
//
// Extract the binary data from the cookies so that
// data can be directly compared at the time it is
// taken from the X request.
//
int validateCookie();
//
// Generate a fake random cookie and copy it to the
// provided string.
//
void generateCookie(char *cookie);
private:
char *display_;
char *file_;
T_timestamp last_;
char *fakeCookie_;
char *realCookie_;
char *fakeData_;
char *realData_;
int dataSize_;
int generatedCookie_;
};
#endif /* Auth_H */
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