text: //  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])
  	{
  	    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)
  	{
  	    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()
  	{
  	    vncEncryptPasswd("", encrypted);
  	}
  	inline ~FromClear()
  	{
  	}
  	inline operator const char*() const {return encrypted;};
      private:
  	char encrypted[MAXPWLEN];
      };
  };
  
  #endif
  