<?php

/*
    Copyright (C) 2014-2015 Deciso B.V.
    Copyright (C) 2003-2005 Manuel Kasper <mk@neon1.net>
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
*/

require_once("guiconfig.inc");
require_once("interfaces.inc");
require_once("services.inc");
require_once("plugins.inc.d/ipsec.inc");

if (!isset($config['ipsec']) || !is_array($config['ipsec'])) {
    $config['ipsec'] = array();
}

if (!isset($config['ipsec']['mobilekey'])) {
    $config['ipsec']['mobilekey'] = array();
} else {
    ipsec_mobilekey_sort();
}

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    $pconfig = array();
    if (isset($_GET['id']) && is_numericint($_GET['id']) && isset($config['ipsec']['mobilekey'][$_GET['id']])) {
        // fetch record
        $id = $_GET['id'];
        $pconfig['ident'] = $config['ipsec']['mobilekey'][$id]['ident'];
        $pconfig['psk'] = $config['ipsec']['mobilekey'][$id]['pre-shared-key'];
        $pconfig['type'] = $config['ipsec']['mobilekey'][$id]['type'];
    } else {
        // init new
        $pconfig['ident'] = '';
        $pconfig['psk'] = '';
        $pconfig['type'] = 'PSK';
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input_errors = array();
    $pconfig = $_POST;
    // fetch record number if valid
    if (isset($_POST['id']) && is_numericint($_POST['id']) && isset($config['ipsec']['mobilekey'][$_POST['id']])) {
        $id = $_POST['id'];
    } else {
        $id = null;
    }

    /* input validation */
    $userids = array();
    foreach ($config['system']['user'] as $uid => $user) {
        $userids[$user['name']] = $uid;
    }
    if (isset($pconfig['ident']) && array_key_exists($pconfig['ident'], $userids)) {
        $input_errors[] = gettext("A user with this name already exists. Add the key to the user instead.");
    }
    unset($userids);

    $reqdfields = explode(" ", "ident psk");
    $reqdfieldsn = array(gettext("Identifier"),gettext("Pre-Shared Key"));

    do_input_validation($_POST, $reqdfields, $reqdfieldsn, $input_errors);

    if (empty($pconfig['ident']) || preg_match("/[^a-zA-Z0-9@\.\-]/", $pconfig['ident'])) {
        $input_errors[] = gettext("The identifier contains invalid characters.");
    }

    /* make sure there are no dupes on new entries */
    $recidx = 0 ;
    foreach ($config['ipsec']['mobilekey'] as $secretent) {
        if ($secretent['ident'] == $pconfig['ident'] && ($recidx != $id || $id === null)) {
            $input_errors[] = gettext("Another entry with the same identifier already exists.");
            break;
        }
        $recidx++;
    }

    if (count($input_errors) == 0) {
        $secretent = array();
        $secretent['ident'] = $pconfig['ident'];
        $secretent['pre-shared-key'] = $pconfig['psk'];
        $secretent['type'] = $pconfig['type'];

        if ($id !== null) {
            // edit existing key
            $config['ipsec']['mobilekey'][$id] = $secretent;
            $config_write_text = gettext("Edited");
        } else {
            $config_write_text = gettext("Added");
            $config['ipsec']['mobilekey'][] = $secretent;
        }

        write_config("{$config_write_text} IPsec Pre-Shared Keys");
        mark_subsystem_dirty('ipsec');

        header(url_safe('Location: /vpn_ipsec_keys.php'));
        exit;
    }
}

$service_hook = 'ipsec';

legacy_html_escape_form_data($pconfig);

include("head.inc");

?>

<body>
<?php include("fbegin.inc"); ?>

  <section class="page-content-main">
    <div class="container-fluid">
      <div class="row">
        <?php if (isset($input_errors) && count($input_errors) > 0) {
                print_input_errors($input_errors);
}
        ?>
        <section class="col-xs-12">
          <div class="content-box">
            <form method="post" name="iform" id="iform">
              <div class="table-responsive">
                <table class="table table-striped">
                  <tr>
                    <td><a id="help_for_ident" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Identifier"); ?></td>
                    <td>
                      <input name="ident" type="text" class="formfld unknown" id="ident" size="30" value="<?=$pconfig['ident'];?>" />
                      <div class="hidden" for="help_for_ident">
                        <?=gettext("This can be either an IP address, fully qualified domain name or an email address."); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><i class="fa fa-info-circle text-muted"></i> <?=gettext("Pre-Shared Key"); ?></td>
                    <td>
                      <input name="psk" type="text" class="formfld unknown" id="psk" size="40" value="<?=$pconfig['psk'];?>" />
                    </td>
                  </tr>
                  <tr>
                    <td><i class="fa fa-info-circle text-muted"></i> <?=gettext("Type"); ?></td>
                    <td>
                      <select name="type" class="selectpicker">
                        <option value="PSK" <?=empty($pconfig['type']) || $pconfig['type'] == 'PSK' ?  "selected=\"selected\"" : ""; ?>><?=gettext("PSK");?></option>
                        <option value="EAP" <?=$pconfig['type'] == "EAP" ?  "selected=\"selected\"" : ""; ?>><?=gettext("EAP");?></option>
                      </select>
                    </td>
                  </tr>
                  <tr>
                    <td>&nbsp;</td>
                    <td>
                      <input name="Submit" type="submit" class="btn btn-primary" value="<?=gettext("Save"); ?>" />
<?php                 if (isset($id) && isset($config['ipsec']['mobilekey'][$id])) :
?>
                      <input name="id" type="hidden" value="<?=htmlspecialchars($id);?>" />
<?php
endif; ?>
                    </td>
                  </tr>
                </table>
              </div>
            </form>
          </div>
        </section>
      </div>
    </div>
  </section>

<?php include("foot.inc");
