<?php
/*******************************************************************************
*  Title: Help Desk Software HESK
*  Version: 2.6.1 from 26th February 2015
*  Author: Klemen Stirn
*  Website: http://www.hesk.com
********************************************************************************
*  COPYRIGHT AND TRADEMARK NOTICE
*  Copyright 2005-2015 Klemen Stirn. All Rights Reserved.
*  HESK is a registered trademark of Klemen Stirn.

*  The HESK may be used and modified free of charge by anyone
*  AS LONG AS COPYRIGHT NOTICES AND ALL THE COMMENTS REMAIN INTACT.
*  By using this code you agree to indemnify Klemen Stirn from any
*  liability that might arise from it's use.

*  Selling the code for this program, in part or full, without prior
*  written consent is expressly forbidden.

*  Using this code, in part or full, to create derivate work,
*  new scripts or products is expressly forbidden. Obtain permission
*  before redistributing this software over the Internet or in
*  any other medium. In all cases copyright and header must remain intact.
*  This Copyright is in full effect in any country that has International
*  Trade Agreements with the United States of America or
*  with the European Union.

*  Removing any of the copyright notices without purchasing a license
*  is expressly forbidden. To remove HESK copyright notice you must purchase
*  a license for this script. For more information on how to obtain
*  a license please visit the page below:
*  https://www.hesk.com/buy.php
*******************************************************************************/

define('IN_SCRIPT',1);
define('HESK_PATH','../');

/* Get all the required files and functions */
require(HESK_PATH . 'hesk_settings.inc.php');
require(HESK_PATH . 'inc/common.inc.php');
require(HESK_PATH . 'inc/admin_functions.inc.php');
hesk_load_database_functions();

hesk_session_start();
hesk_dbConnect();

/* What should we do? */
$action = hesk_REQUEST('a');

switch ($action)
{
    case 'do_login':
    	do_login();
        break;
    case 'login':
    	print_login();
        break;
    case 'logout':
    	logout();
        break;
    default:
    	hesk_autoLogin();
    	print_login();
}

/* Print footer */
require_once(HESK_PATH . 'inc/footer.inc.php');
exit();

/*** START FUNCTIONS ***/
function do_login()
{
	global $hesk_settings, $hesklang;

    $hesk_error_buffer = array();

    $user = hesk_input( hesk_POST('user') );
    if (empty($user))
    {
		$myerror = $hesk_settings['list_users'] ? $hesklang['select_username'] : $hesklang['enter_username'];
        $hesk_error_buffer['user'] = $myerror;
    }
    define('HESK_USER', $user);

	$pass = hesk_input( hesk_POST('pass') );
	if (empty($pass))
	{
    	$hesk_error_buffer['pass'] = $hesklang['enter_pass'];
	}

	if ($hesk_settings['secimg_use'] == 2 && !isset($_SESSION['img_a_verified']))
	{
		// Using ReCaptcha?
		if ($hesk_settings['recaptcha_use'] == 1)
		{
			require_once(HESK_PATH . 'inc/recaptcha/recaptchalib.php');

			$resp = recaptcha_check_answer($hesk_settings['recaptcha_private_key'],
			$_SERVER['REMOTE_ADDR'],
			hesk_POST('recaptcha_challenge_field', ''),
			hesk_POST('recaptcha_response_field', '')
            );

			if ($resp->is_valid)
			{
				$_SESSION['img_a_verified']=true;
			}
			else
			{
				$hesk_error_buffer['mysecnum']=$hesklang['recaptcha_error'];
			}
		}
        // Using ReCaptcha API v2?
        elseif ($hesk_settings['recaptcha_use'] == 2)
        {
            require(HESK_PATH . 'inc/recaptcha/recaptchalib_v2.php');

            $resp = null;
            $reCaptcha = new ReCaptcha($hesk_settings['recaptcha_private_key']);

            // Was there a reCAPTCHA response?
            if ( isset($_POST["g-recaptcha-response"]) )
            {
                $resp = $reCaptcha->verifyResponse($_SERVER["REMOTE_ADDR"], hesk_POST("g-recaptcha-response") );
            }

            if ($resp != null && $resp->success)
            {
                $_SESSION['img_a_verified']=true;
            }
            else
            {
                $hesk_error_buffer['mysecnum']=$hesklang['recaptcha_error'];
            }
        }
		// Using PHP generated image
		else
		{
			$mysecnum = intval( hesk_POST('mysecnum', 0) );

			if ( empty($mysecnum) )
			{
				$hesk_error_buffer['mysecnum'] = $hesklang['sec_miss'];
			}
			else
			{
				require(HESK_PATH . 'inc/secimg.inc.php');
				$sc = new PJ_SecurityImage($hesk_settings['secimg_sum']);
				if ( isset($_SESSION['checksum']) && $sc->checkCode($mysecnum, $_SESSION['checksum']) )
				{
					$_SESSION['img_a_verified'] = true;
				}
				else
				{
					$hesk_error_buffer['mysecnum'] = $hesklang['sec_wrng'];
				}
			}
		}
	}

    /* Any missing fields? */
	if (count($hesk_error_buffer)!=0)
	{
    	$_SESSION['a_iserror'] = array_keys($hesk_error_buffer);

	    $tmp = '';
	    foreach ($hesk_error_buffer as $error)
	    {
	        $tmp .= "<li>$error</li>\n";
	    }
	    $hesk_error_buffer = $tmp;

	    $hesk_error_buffer = $hesklang['pcer'].'<br /><br /><ul>'.$hesk_error_buffer.'</ul>';
	    hesk_process_messages($hesk_error_buffer,'NOREDIRECT');
        print_login();
        exit();
	}
    elseif (isset($_SESSION['img_a_verified']))
    {
		unset($_SESSION['img_a_verified']);
    }

	/* User entered all required info, now lets limit brute force attempts */
	hesk_limitBfAttempts();

	$result = hesk_dbQuery("SELECT * FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."users` WHERE `user` = '".hesk_dbEscape($user)."' LIMIT 1");
	if (hesk_dbNumRows($result) != 1)
	{
        hesk_session_stop();
    	$_SESSION['a_iserror'] = array('user','pass');
    	hesk_process_messages($hesklang['wrong_user'],'NOREDIRECT');
        print_login();
        exit();
	}

	$res=hesk_dbFetchAssoc($result);
	foreach ($res as $k=>$v)
	{
	    $_SESSION[$k]=$v;
	}

	/* Check password */
	if (hesk_Pass2Hash($pass) != $_SESSION['pass'])
    {
        hesk_session_stop();
    	$_SESSION['a_iserror'] = array('pass');
		hesk_process_messages($hesklang['wrong_pass'],'NOREDIRECT');
		print_login();
		exit();
	}

    $pass_enc = hesk_Pass2Hash($_SESSION['pass'].strtolower($user).$_SESSION['pass']);

    /* Check if default password */
    if ($_SESSION['pass'] == '499d74967b28a841c98bb4baaabaad699ff3c079')
    {
    	hesk_process_messages($hesklang['chdp'],'NOREDIRECT','NOTICE');
    }

	unset($_SESSION['pass']);


	/* Login successful, clean brute force attempts */
	hesk_cleanBfAttempts();

    /* Make sure our user is active */
    if (!$_SESSION['active']) {
        hesk_session_stop();
        $_SESSION['a_iserror'] = array('active');
        hesk_process_messages($hesklang['inactive_user'], 'NOREDIRECT');
        print_login();
        exit();
    }

    /* Regenerate session ID (security) */
	hesk_session_regenerate_id();

	/* Remember username? */
	if ($hesk_settings['autologin'] && hesk_POST('remember_user') == 'AUTOLOGIN')
	{
		setcookie('hesk_username', "$user", strtotime('+1 year'));
		setcookie('hesk_p', "$pass_enc", strtotime('+1 year'));
	}
	elseif ( hesk_POST('remember_user') == 'JUSTUSER')
	{
		setcookie('hesk_username', "$user", strtotime('+1 year'));
		setcookie('hesk_p', '');
	}
	else
	{
		// Expire cookie if set otherwise
		setcookie('hesk_username', '');
		setcookie('hesk_p', '');
	}

    /* Close any old tickets here so Cron jobs aren't necessary */
	if ($hesk_settings['autoclose'])
    {
    	$revision = sprintf($hesklang['thist3'],hesk_date(),$hesklang['auto']);
        $dt  = date('Y-m-d H:i:s',time() - $hesk_settings['autoclose']*86400);

        // Notify customer of closed ticket?
        if ($hesk_settings['notify_closed'])
        {
            $closedStatusRs = hesk_dbQuery('SELECT `ID` FROM `'.hesk_dbEscape($hesk_settings['db_pfix']).'statuses` WHERE `IsDefaultStaffReplyStatus` = 1');
            $closedStatus = hesk_dbFetchAssoc($closedStatusRs);
            // Get list of tickets
            $result = hesk_dbQuery("SELECT * FROM `".$hesk_settings['db_pfix']."tickets` WHERE `status` = ".$closedStatus['ID']." AND `lastchange` <= '".hesk_dbEscape($dt)."' ");
            if (hesk_dbNumRows($result) > 0)
            {
                global $ticket;

                // Load required functions?
                if ( ! function_exists('hesk_notifyCustomer') )
                {
                    require(HESK_PATH . 'inc/email_functions.inc.php');
                }

                while ($ticket = hesk_dbFetchAssoc($result))
                {
                    $ticket['dt'] = hesk_date($ticket['dt'], true);
                    $ticket['lastchange'] = hesk_date($ticket['lastchange'], true);
                    $ticket = hesk_ticketToPlain($ticket, 1, 0);
                    hesk_notifyCustomer('ticket_closed');
                }
            }
        }

        // Update ticket statuses and history in database
        hesk_dbQuery("UPDATE `".$hesk_settings['db_pfix']."tickets` SET `status`='3', `closedat`=NOW(), `closedby`='-1', `history`=CONCAT(`history`,'".hesk_dbEscape($revision)."') WHERE `status` = '2' AND `lastchange` <= '".hesk_dbEscape($dt)."' ");
    }

    /* Redirect to the destination page */
    header('Location: ' . hesk_verifyGoto() );
	exit();
} // End do_login()


function print_login()
{
	global $hesk_settings, $hesklang;

    // Tell header to load reCaptcha API if needed
    if ($hesk_settings['recaptcha_use'] == 2)
    {
        define('RECAPTCHA',1);
    }

    $hesk_settings['tmp_title'] = $hesk_settings['hesk_title'] . ' - ' .$hesklang['admin_login'];
	require_once(HESK_PATH . 'inc/header.inc.php');

	if ( hesk_isREQUEST('notice') )
	{
    	hesk_process_messages($hesklang['session_expired'],'NOREDIRECT');
	}

    if (!isset($_SESSION['a_iserror']))
    {
    	$_SESSION['a_iserror'] = array();
    }

	?>
    <div class="loginError"><?php
	            /* This will handle error, success and notice messages */
	            hesk_handle_messages();
	        ?></div>
    <div>
    <div class="panel panel-default form-signin">
        <div class="panel-heading">
            <h4><span <?php echo $iconDisplay; ?>><span class="mega-octicon octicon-sign-in"></span>&nbsp;</span><?php echo $hesklang['admin_login']; ?></a></h4>
        </div>
        <div class="panel-body">
            <form class="form-signin form-horizontal" role="form" action="index.php" method="post" name="form1">
                <?php if (in_array('pass',$_SESSION['a_iserror'])) { echo '<div class="form-group has-error">';} else { echo '<div class="form-group">';}?>
                <label for="user" class="col-sm-4 control-label"><?php echo $hesklang['username']; ?>:</label>
                <div class="col-sm-8">
                    <?php

                    if (defined('HESK_USER'))
                    {
                        $savedUser = HESK_USER;
                    }
                    else
                    {
                        $savedUser = hesk_htmlspecialchars( hesk_COOKIE('hesk_username') );
                    }

                    $is_1 = '';
                    $is_2 = '';
                    $is_3 = '';

                    $remember_user = hesk_POST('remember_user');

                    if ($hesk_settings['autologin'] && (isset($_COOKIE['hesk_p']) || $remember_user == 'AUTOLOGIN') )
                    {
                        $is_1 = 'checked="checked"';
                    }
                    elseif (isset($_COOKIE['hesk_username']) || $remember_user == 'JUSTUSER' )
                    {
                        $is_2 = 'checked="checked"';
                    }
                    else
                    {
                        $is_3 = 'checked="checked"';
                    }

                    if ($hesk_settings['list_users'])
                    {
                        echo '<select class="form-control" name="user">';
                        $res = hesk_dbQuery('SELECT `user` FROM `'.hesk_dbEscape($hesk_settings['db_pfix']).'users` ORDER BY `user` ASC');
                        while ($row=hesk_dbFetchAssoc($res))
                        {
                            $sel = (strtolower($savedUser) == strtolower($row['user'])) ? 'selected="selected"' : '';
                            echo '<option value="'.$row['user'].'" '.$sel.'>'.$row['user'].'</option>';
                        }
                        echo '</select>';

                    }
                    else
                    {
                        echo '<input class="form-control" type="text" name="user" size="35" placeholder="'.$hesklang['username'].'" value="'.$savedUser.'" />';
                    }
                    ?>
                </div>
            </div>
            <?php if (in_array('pass',$_SESSION['a_iserror'])) { echo '<div class="form-group has-error">';} else { echo '<div class="form-group">';}?>
            <label for="pass" class="col-sm-4 control-label"><?php echo $hesklang['pass']; ?>:</label>
            <div class="col-sm-8">
                <input type="password" class="form-control" id="pass" name="pass" size="35" placeholder="<?php echo $hesklang['pass']; ?>"  />
            </div>
        </div>
            <?php
            if ($hesk_settings['secimg_use'] == 2)
            {

                // SPAM prevention verified for this session
                if (isset($_SESSION['img_a_verified']))
                {
                    echo '<img src="'.HESK_PATH.'img/success.png" width="16" height="16" border="0" alt="" style="vertical-align:text-bottom" /> '.$hesklang['vrfy'];
                }
                // Not verified yet, should we use Recaptcha?
                elseif ($hesk_settings['recaptcha_use'] == 1)
                {
                    ?>
                    <script type="text/javascript">
                        var RecaptchaOptions = {
                            theme : '<?php echo ( isset($_SESSION['a_iserror']) && in_array('mysecnum',$_SESSION['a_iserror']) ) ? 'red' : 'white'; ?>',
                            custom_translations : {
                                visual_challenge : "<?php echo hesk_slashJS($hesklang['visual_challenge']); ?>",
                                audio_challenge : "<?php echo hesk_slashJS($hesklang['audio_challenge']); ?>",
                                refresh_btn : "<?php echo hesk_slashJS($hesklang['refresh_btn']); ?>",
                                instructions_visual : "<?php echo hesk_slashJS($hesklang['instructions_visual']); ?>",
                                instructions_context : "<?php echo hesk_slashJS($hesklang['instructions_context']); ?>",
                                instructions_audio : "<?php echo hesk_slashJS($hesklang['instructions_audio']); ?>",
                                help_btn : "<?php echo hesk_slashJS($hesklang['help_btn']); ?>",
                                play_again : "<?php echo hesk_slashJS($hesklang['play_again']); ?>",
                                cant_hear_this : "<?php echo hesk_slashJS($hesklang['cant_hear_this']); ?>",
                                incorrect_try_again : "<?php echo hesk_slashJS($hesklang['incorrect_try_again']); ?>",
                                image_alt_text : "<?php echo hesk_slashJS($hesklang['image_alt_text']); ?>"
                            }
                        };
                    </script>
                    <?php
                    require_once(HESK_PATH . 'inc/recaptcha/recaptchalib.php');
                    echo '<div class="form-group"><div class="col-md-8 col-md-offset-4">';
                    echo recaptcha_get_html($hesk_settings['recaptcha_public_key'], null, true);
                    echo '</div></div>';
                }
                // Use reCaptcha API v2?
                elseif ($hesk_settings['recaptcha_use'] == 2)
                {
                    ?>
                    <div class="form-group">
                        <div class="col-md-8 col-md-offset-4">
                            <div class="g-recaptcha" data-sitekey="<?php echo $hesk_settings['recaptcha_public_key']; ?>"></div>
                        </div>
                    </div>
                <?php
                }
                // At least use some basic PHP generated image (better than nothing)
                else
                {
                    echo '<div class="form-group"><div class="col-md-8 col-md-offset-4">';
                    $cls = in_array('mysecnum',$_SESSION['a_iserror']) ? ' class="isError" ' : '';

                    echo $hesklang['sec_enter'].'<br />&nbsp;<br /><img src="'.HESK_PATH.'print_sec_img.php?'.rand(10000,99999).'" width="150" height="40" alt="'.$hesklang['sec_img'].'" title="'.$hesklang['sec_img'].'" border="1" name="secimg" style="vertical-align:text-bottom" /> '.
                        '<a href="javascript:void(0)" onclick="javascript:document.form1.secimg.src=\''.HESK_PATH.'print_sec_img.php?\'+ ( Math.floor((90000)*Math.random()) + 10000);"><img src="'.HESK_PATH.'img/reload.png" height="24" width="24" alt="'.$hesklang['reload'].'" title="'.$hesklang['reload'].'" border="0" style="vertical-align:text-bottom" /></a>'.
                        '<br />&nbsp;<br /><input type="text" name="mysecnum" size="20" maxlength="5" '.$cls.' />';
                    echo '</div></div>';
                }
            } // End if $hesk_settings['secimg_use'] == 2

            if ($hesk_settings['autologin'])
            {
                ?>
                <div class="form-group">
                    <div class="col-md-offset-4 col-md-8">
                        <div class="radio">
                            <label><input type="radio" name="remember_user" value="AUTOLOGIN" <?php echo $is_1; ?> /> <?php echo $hesklang['autologin']; ?></label>
                        </div>
                        <div class="radio">
                            <label><input type="radio" name="remember_user" value="JUSTUSER" <?php echo $is_2; ?> /> <?php echo $hesklang['just_user']; ?></label>
                        </div>
                        <div class="radio">
                            <label><input type="radio" name="remember_user" value="NOTHANKS" <?php echo $is_3; ?> /> <?php echo $hesklang['nothx']; ?></label>
                        </div>
                    </div>
                </div>
            <?php
            }
            else
            {
                ?>
                <div class="form-group">
                    <div class="col-md-offset-4 col-md-8">
                        <div class="checkbox">
                            <label><input type="checkbox" name="remember_user" value="JUSTUSER" <?php echo $is_2; ?> /> <?php echo $hesklang['remember_user']; ?></label>
                        </div>
                    </div>
                </div>
            <?php
            } // End if $hesk_settings['autologin']
            ?>
            <div class="form-group">
                <div class="col-md-offset-4 col-md-8">
                    <input type="submit" value="<?php echo $hesklang['click_login']; ?>" class="btn btn-default" />
                    <input type="hidden" name="a" value="do_login" />
                    <?php
                    if ( hesk_isREQUEST('goto') && $url=hesk_REQUEST('goto') )
                    {
                        echo '<input type="hidden" name="goto" value="'.$url.'" />';
                    }

                    // Do we allow staff password reset?
                    if ($hesk_settings['reset_pass'])
                    {
                        echo '<br />&nbsp;<br /><a href="password.php" class="smaller">'.$hesklang['fpass'].'</a>';
                    }
                    ?>
                </div>
            </div>

            </form>
        </div>
    </div>

    </div>

    <p>&nbsp;</p>

	<?php
	hesk_cleanSessionVars('a_iserror');

    require_once(HESK_PATH . 'inc/footer.inc.php');
    exit();
} // End print_login()


function logout() {
	global $hesk_settings, $hesklang;

    if ( ! hesk_token_check('GET', 0))
    {
		print_login();
        exit();
    }

    /* Delete from Who's online database */
	if ($hesk_settings['online'])
	{
    	require(HESK_PATH . 'inc/users_online.inc.php');
		hesk_setOffline($_SESSION['id']);
	}
    /* Destroy session and cookies */
	hesk_session_stop();

    /* If we're using the security image for admin login start a new session */
	if ($hesk_settings['secimg_use'] == 2)
    {
    	hesk_session_start();
    }

	/* Show success message and reset the cookie */
    hesk_process_messages($hesklang['logout_success'],'NOREDIRECT','SUCCESS');
    setcookie('hesk_p', '');

    /* Print the login form */
	print_login();
	exit();
} // End logout()

?>