/* 
 * Copyright (C) 2006 Martin Koegler
 * Copyright (C) 2010 TigerVNC Team
 *    
 * This 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 software 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 software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <rfb/Configuration.h>
#include <rfb/Exception.h>
#include <rfb/UnixPasswordValidator.h>
#include <rfb/pam.h>
#include <rfb/LogWriter.h>

#if !defined(WIN32) && !defined(WIN64) && !defined(__APPLE__)
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <rfb/ServerCore.h>
#endif

using namespace rfb;

static LogWriter vlog("UnixPasswordValidator");

static StringParameter pamService
  ("PAMService", "Service name for PAM password validation", "vnc");
AliasParameter pam_service("pam_service", "Alias for PAMService",
                           &pamService);

int do_pam_auth(const char *service, const char *username,
	        const char *password);

bool UnixPasswordValidator::validateInternal(SConnection * sc,
					     const char *username,
					     const char *password)
{
  bool result;

  CharArray service(strDup(pamService.getData()));
  result = do_pam_auth(service.buf, username, password);
#if !defined(WIN32) && !defined(WIN64) && !defined(__APPLE__)
  if (result) {
    char idleFilename[256];
    struct passwd * pw;

    pw = getpwuid(getuid());
    if (pw) {
      snprintf(idleFilename, 255, "%s%s", NOIDLETIMOUTBASE, pw->pw_name);
      idleFilename[255] = 0;
      if (!access(idleFilename, F_OK)) {
        vlog.debug("Found %s, increasing IdleTimeout to maximum %u", idleFilename, MAXIDLETIMEOUT);
        rfb::Server::idleTimeout.setParam(MAXIDLETIMEOUT);
      }
    }
  }
#endif
  return result;
}
