//  Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
//
//  This file is part of the VNC system.
//
//  The VNC system 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 program 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 program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
//  USA.
//
// TightVNC distribution homepage on the Web: http://www.tightvnc.com/
//
// If the source code for the VNC system is not available from the place 
// whence you received this file, check http://www.uk.research.att.com/vnc or contact
// the authors on vnc@uk.research.att.com for information on obtaining it.


// vncPasswd

// This header provides helpers for handling encrypted password data.
// The password handling routines found in vncauth.h should not be used directly

class vncPasswd;

#if (!defined(_WINVNC_VNCPASSWD))
#define _WINVNC_VNCPASSWD

#include "stdhdrs.h"
extern "C" {
#include "vncauth.h"
}

// Password handling helper class
class vncPasswd
{
public:

    // Password decryptor!
    class ToText
    {
    public:
	inline ToText(const char encrypted[MAXPWLEN])
	{
	    vnclog.Print(LL_INTINFO, VNCLOG("PASSWD : ToText called\n"));
	    plaintext = vncDecryptPasswd((char *)encrypted);
	}
	inline ~ToText()
	{
	    if (plaintext != NULL)
	    {
		ZeroMemory(plaintext, strlen(plaintext));
		free(plaintext);
	    }
	}
	inline operator const char*() const {return plaintext;};
    private:
	char *plaintext;
    };

    class FromText
    {
    public:
	inline FromText(char *unencrypted)
	{
	    vnclog.Print(LL_INTINFO, VNCLOG("PASSWD : FromText called\n"));
	    vncEncryptPasswd(unencrypted, encrypted);
	    ZeroMemory(unencrypted, strlen(unencrypted));
	}
	inline ~FromText()
	{
	}
	inline operator const char*() const {return encrypted;};
    private:
	char encrypted[MAXPWLEN];
    };

    class FromClear
    {
    public:
	inline FromClear()
	{
	    vnclog.Print(LL_INTINFO, VNCLOG("PASSWD : FromClear called\n"));
	    vncEncryptPasswd("", encrypted);
	}
	inline ~FromClear()
	{
	}
	inline operator const char*() const {return encrypted;};
    private:
	char encrypted[MAXPWLEN];
    };
};

#endif
