609 lines
No EOL
17 KiB
PHP
609 lines
No EOL
17 KiB
PHP
<?php
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/**
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* Simple Machines Forum (SMF)
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*
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* @package SMF
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* @author Simple Machines http://www.simplemachines.org
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* @copyright 2011 Simple Machines
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* @license http://www.simplemachines.org/about/smf/license.php BSD
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*
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* @version 2.0.11
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*/
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if (!defined('SMF'))
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die('Hacking attempt...');
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/* This file handles all of the OpenID interfacing and communications.
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void smf_openID_validate(string openid_url, bool allow_immediate_validation = true)
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- openid_uri is the URI given by the user
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- Validates the URI and changes it to a fully canonicalize URL
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- Determines the IDP server and delegation
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- optional array of fields to restore when validation complete.
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- Redirects the user to the IDP for validation
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*/
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function smf_openID_validate($openid_uri, $return = false, $save_fields = array(), $return_action = null)
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{
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global $sourcedir, $scripturl, $boardurl, $modSettings;
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$openid_url = smf_openID_canonize($openid_uri);
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$response_data = smf_openID_getServerInfo($openid_url);
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if ($response_data === false)
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return 'no_data';
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if (($assoc = smf_openID_getAssociation($response_data['server'])) == null)
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$assoc = smf_openID_makeAssociation($response_data['server']);
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// Before we go wherever it is we are going, store the GET and POST data, because it might be useful when we get back.
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$request_time = time();
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// Just in case they are doing something else at this time.
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while (isset($_SESSION['openid']['saved_data'][$request_time]))
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$request_time = md5($request_time);
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$_SESSION['openid']['saved_data'][$request_time] = array(
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'get' => $_GET,
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'post' => $_POST,
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'openid_uri' => $openid_url,
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'cookieTime' => $modSettings['cookieTime'],
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);
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$parameters = array(
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'openid.mode=checkid_setup',
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'openid.trust_root=' . urlencode($scripturl),
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'openid.identity=' . urlencode(empty($response_data['delegate']) ? $openid_url : $response_data['delegate']),
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'openid.assoc_handle=' . urlencode($assoc['handle']),
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'openid.return_to=' . urlencode($scripturl . '?action=openidreturn&sa=' . (!empty($return_action) ? $return_action : $_REQUEST['action']) . '&t=' . $request_time . (!empty($save_fields) ? '&sf=' . base64_encode(serialize($save_fields)) : '')),
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);
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// If they are logging in but don't yet have an account or they are registering, let's request some additional information
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if (($_REQUEST['action'] == 'login2' && !smf_openid_member_exists($openid_url)) || ($_REQUEST['action'] == 'register' || $_REQUEST['action'] == 'register2'))
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{
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// Email is required.
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$parameters[] = 'openid.sreg.required=email';
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// The rest is just optional.
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$parameters[] = 'openid.sreg.optional=nickname,dob,gender';
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}
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$redir_url = $response_data['server'] . '?' . implode('&', $parameters);
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if ($return)
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return $redir_url;
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else
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redirectexit($redir_url);
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}
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// Revalidate a user using OpenID. Note that this function will not return when authentication is required.
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function smf_openID_revalidate()
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{
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global $user_settings;
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if (isset($_SESSION['openid_revalidate_time']) && $_SESSION['openid_revalidate_time'] > time() - 60)
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{
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unset($_SESSION['openid_revalidate_time']);
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return true;
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}
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else
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smf_openID_validate($user_settings['openid_uri'], false, null, 'revalidate');
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// We shouldn't get here.
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trigger_error('Hacking attempt...', E_USER_ERROR);
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}
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function smf_openID_getAssociation($server, $handle = null, $no_delete = false)
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{
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global $smcFunc;
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if (!$no_delete)
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{
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// Delete the already expired associations.
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$smcFunc['db_query']('openid_delete_assoc_old', '
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DELETE FROM {db_prefix}openid_assoc
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WHERE expires <= {int:current_time}',
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array(
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'current_time' => time(),
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)
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);
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}
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// Get the association that has the longest lifetime from now.
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$request = $smcFunc['db_query']('openid_select_assoc', '
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SELECT server_url, handle, secret, issued, expires, assoc_type
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FROM {db_prefix}openid_assoc
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WHERE server_url = {string:server_url}' . ($handle === null ? '' : '
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AND handle = {string:handle}') . '
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ORDER BY expires DESC',
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array(
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'server_url' => $server,
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'handle' => $handle,
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)
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);
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if ($smcFunc['db_num_rows']($request) == 0)
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return null;
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$return = $smcFunc['db_fetch_assoc']($request);
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$smcFunc['db_free_result']($request);
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return $return;
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}
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function smf_openID_makeAssociation($server)
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{
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global $smcFunc, $modSettings, $p;
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$parameters = array(
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'openid.mode=associate',
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);
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// We'll need to get our keys for the Diffie-Hellman key exchange.
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$dh_keys = smf_openID_setup_DH();
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// If we don't support DH we'll have to see if the provider will accept no encryption.
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if ($dh_keys === false)
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$parameters[] = 'openid.session_type=';
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else
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{
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$parameters[] = 'openid.session_type=DH-SHA1';
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$parameters[] = 'openid.dh_consumer_public=' . urlencode(base64_encode(long_to_binary($dh_keys['public'])));
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$parameters[] = 'openid.assoc_type=HMAC-SHA1';
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}
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// The data to post to the server.
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$post_data = implode('&', $parameters);
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$data = fetch_web_data($server, $post_data);
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// Parse the data given.
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preg_match_all('~^([^:]+):(.+)$~m', $data, $matches);
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$assoc_data = array();
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foreach ($matches[1] as $key => $match)
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$assoc_data[$match] = $matches[2][$key];
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if (!isset($assoc_data['assoc_type']) || (empty($assoc_data['mac_key']) && empty($assoc_data['enc_mac_key'])))
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fatal_lang_error('openid_server_bad_response');
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// Clean things up a bit.
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$handle = isset($assoc_data['assoc_handle']) ? $assoc_data['assoc_handle'] : '';
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$issued = time();
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$expires = $issued + min((int)$assoc_data['expires_in'], 60);
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$assoc_type = isset($assoc_data['assoc_type']) ? $assoc_data['assoc_type'] : '';
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// !!! Is this really needed?
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foreach (array('dh_server_public', 'enc_mac_key') as $key)
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if (isset($assoc_data[$key]))
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$assoc_data[$key] = str_replace(' ', '+', $assoc_data[$key]);
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// Figure out the Diffie-Hellman secret.
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if (!empty($assoc_data['enc_mac_key']))
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{
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$dh_secret = bcpowmod(binary_to_long(base64_decode($assoc_data['dh_server_public'])), $dh_keys['private'], $p);
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$secret = base64_encode(binary_xor(sha1_raw(long_to_binary($dh_secret)), base64_decode($assoc_data['enc_mac_key'])));
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}
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else
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$secret = $assoc_data['mac_key'];
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// Store the data
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$smcFunc['db_insert']('replace',
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'{db_prefix}openid_assoc',
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array('server_url' => 'string', 'handle' => 'string', 'secret' => 'string', 'issued' => 'int', 'expires' => 'int', 'assoc_type' => 'string'),
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array($server, $handle, $secret, $issued, $expires, $assoc_type),
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array('server_url', 'handle')
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);
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return array(
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'server' => $server,
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'handle' => $assoc_data['assoc_handle'],
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'secret' => $secret,
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'issued' => $issued,
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'expires' => $expires,
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'assoc_type' => $assoc_data['assoc_type'],
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);
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}
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function smf_openID_removeAssociation($handle)
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{
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global $smcFunc;
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$smcFunc['db_query']('openid_remove_association', '
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DELETE FROM {db_prefix}openid_assoc
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WHERE handle = {string:handle}',
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array(
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'handle' => $handle,
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)
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);
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}
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function smf_openID_return()
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{
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global $smcFunc, $user_info, $user_profile, $sourcedir, $modSettings, $context, $sc, $user_settings;
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// Is OpenID even enabled?
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if (empty($modSettings['enableOpenID']))
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fatal_lang_error('no_access', false);
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if (!isset($_GET['openid_mode']))
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fatal_lang_error('openid_return_no_mode', false);
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// !!! Check for error status!
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if ($_GET['openid_mode'] != 'id_res')
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fatal_lang_error('openid_not_resolved');
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// SMF has this annoying habit of removing the + from the base64 encoding. So lets put them back.
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foreach (array('openid_assoc_handle', 'openid_invalidate_handle', 'openid_sig', 'sf') as $key)
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if (isset($_GET[$key]))
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$_GET[$key] = str_replace(' ', '+', $_GET[$key]);
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// Did they tell us to remove any associations?
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if (!empty($_GET['openid_invalidate_handle']))
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smf_openid_removeAssociation($_GET['openid_invalidate_handle']);
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$server_info = smf_openid_getServerInfo($_GET['openid_identity']);
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// Get the association data.
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$assoc = smf_openID_getAssociation($server_info['server'], $_GET['openid_assoc_handle'], true);
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if ($assoc === null)
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fatal_lang_error('openid_no_assoc');
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$secret = base64_decode($assoc['secret']);
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$signed = explode(',', $_GET['openid_signed']);
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$verify_str = '';
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foreach ($signed as $sign)
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{
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$verify_str .= $sign . ':' . strtr($_GET['openid_' . str_replace('.', '_', $sign)], array('&' => '&')) . "\n";
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}
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$verify_str = base64_encode(sha1_hmac($verify_str, $secret));
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if ($verify_str != $_GET['openid_sig'])
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{
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fatal_lang_error('openid_sig_invalid', 'critical');
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}
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if (!isset($_SESSION['openid']['saved_data'][$_GET['t']]))
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fatal_lang_error('openid_load_data');
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$openid_uri = $_SESSION['openid']['saved_data'][$_GET['t']]['openid_uri'];
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$modSettings['cookieTime'] = $_SESSION['openid']['saved_data'][$_GET['t']]['cookieTime'];
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if (empty($openid_uri))
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fatal_lang_error('openid_load_data');
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// Any save fields to restore?
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$context['openid_save_fields'] = isset($_GET['sf']) ? safe_unserialize(base64_decode($_GET['sf'])) : array();
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// Is there a user with this OpenID_uri?
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$result = $smcFunc['db_query']('', '
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SELECT passwd, id_member, id_group, lngfile, is_activated, email_address, additional_groups, member_name, password_salt,
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openid_uri
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FROM {db_prefix}members
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WHERE openid_uri = {string:openid_uri}',
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array(
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'openid_uri' => $openid_uri,
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)
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);
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$member_found = $smcFunc['db_num_rows']($result);
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if (!$member_found && isset($_GET['sa']) && $_GET['sa'] == 'change_uri' && !empty($_SESSION['new_openid_uri']) && $_SESSION['new_openid_uri'] == $openid_uri)
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{
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// Update the member.
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updateMemberData($user_settings['id_member'], array('openid_uri' => $openid_uri));
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unset($_SESSION['new_openid_uri']);
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$_SESSION['openid'] = array(
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'verified' => true,
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'openid_uri' => $openid_uri,
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);
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// Send them back to profile.
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redirectexit('action=profile;area=authentication;updated');
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}
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elseif (!$member_found)
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{
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// Store the received openid info for the user when returned to the registration page.
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$_SESSION['openid'] = array(
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'verified' => true,
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'openid_uri' => $openid_uri,
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);
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if (isset($_GET['openid_sreg_nickname']))
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$_SESSION['openid']['nickname'] = $_GET['openid_sreg_nickname'];
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if (isset($_GET['openid_sreg_email']))
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$_SESSION['openid']['email'] = $_GET['openid_sreg_email'];
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if (isset($_GET['openid_sreg_dob']))
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$_SESSION['openid']['dob'] = $_GET['openid_sreg_dob'];
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if (isset($_GET['openid_sreg_gender']))
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$_SESSION['openid']['gender'] = $_GET['openid_sreg_gender'];
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// Were we just verifying the registration state?
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if (isset($_GET['sa']) && $_GET['sa'] == 'register2')
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{
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require_once($sourcedir . '/Register.php');
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return Register2(true);
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}
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else
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redirectexit('action=register');
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}
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elseif (isset($_GET['sa']) && $_GET['sa'] == 'revalidate' && $user_settings['openid_uri'] == $openid_uri)
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{
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$_SESSION['openid_revalidate_time'] = time();
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// Restore the get data.
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require_once($sourcedir . '/Subs-Auth.php');
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$_SESSION['openid']['saved_data'][$_GET['t']]['get']['openid_restore_post'] = $_GET['t'];
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$query_string = construct_query_string($_SESSION['openid']['saved_data'][$_GET['t']]['get']);
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redirectexit($query_string);
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}
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else
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{
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$user_settings = $smcFunc['db_fetch_assoc']($result);
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$smcFunc['db_free_result']($result);
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$user_settings['passwd'] = sha1(strtolower($user_settings['member_name']) . $secret);
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$user_settings['password_salt'] = substr(md5(mt_rand()), 0, 4);
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updateMemberData($user_settings['id_member'], array('passwd' => $user_settings['passwd'], 'password_salt' => $user_settings['password_salt']));
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// Cleanup on Aisle 5.
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$_SESSION['openid'] = array(
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'verified' => true,
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'openid_uri' => $openid_uri,
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);
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require_once($sourcedir . '/LogInOut.php');
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if (!checkActivation())
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return;
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DoLogin();
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}
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}
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function smf_openID_canonize($uri)
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{
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// !!! Add in discovery.
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if (strpos($uri, 'http://') !== 0 && strpos($uri, 'https://') !== 0)
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$uri = 'http://' . $uri;
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if (strpos(substr($uri, strpos($uri, '://') + 3), '/') === false)
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$uri .= '/';
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return $uri;
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}
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function smf_openid_member_exists($url)
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{
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global $smcFunc;
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$request = $smcFunc['db_query']('openid_member_exists', '
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SELECT mem.id_member, mem.member_name
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FROM {db_prefix}members AS mem
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WHERE mem.openid_uri = {string:openid_uri}',
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array(
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'openid_uri' => $url,
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)
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);
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$member = $smcFunc['db_fetch_assoc']($request);
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$smcFunc['db_free_result']($request);
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return $member;
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}
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// Prepare for a Diffie-Hellman key exchange.
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function smf_openID_setup_DH($regenerate = false)
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{
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global $p, $g;
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// First off, do we have BC Math available?
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if (!function_exists('bcpow'))
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return false;
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// Defined in OpenID spec.
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$p = '155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443';
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$g = '2';
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// Make sure the scale is set.
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bcscale(0);
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return smf_openID_get_keys($regenerate);
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}
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function smf_openID_get_keys($regenerate)
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{
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global $modSettings, $p, $g;
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// Ok lets take the easy way out, are their any keys already defined for us? They are changed in the daily maintenance scheduled task.
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if (!empty($modSettings['dh_keys']) && !$regenerate)
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{
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// Sweeeet!
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list ($public, $private) = explode("\n", $modSettings['dh_keys']);
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return array(
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'public' => base64_decode($public),
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'private' => base64_decode($private),
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);
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}
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// Dang it, now I have to do math. And it's not just ordinary math, its the evil big interger math. This will take a few seconds.
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$private = smf_openid_generate_private_key();
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$public = bcpowmod($g, $private, $p);
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// Now that we did all that work, lets save it so we don't have to keep doing it.
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$keys = array('dh_keys' => base64_encode($public) . "\n" . base64_encode($private));
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updateSettings($keys);
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return array(
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'public' => $public,
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'private' => $private,
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);
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}
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function smf_openid_generate_private_key()
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{
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global $p;
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static $cache = array();
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$byte_string = long_to_binary($p);
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if (isset($cache[$byte_string]))
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list ($dup, $num_bytes) = $cache[$byte_string];
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else
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{
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$num_bytes = strlen($byte_string) - ($byte_string[0] == "\x00" ? 1 : 0);
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$max_rand = bcpow(256, $num_bytes);
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$dup = bcmod($max_rand, $num_bytes);
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$cache[$byte_string] = array($dup, $num_bytes);
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}
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do
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{
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$str = '';
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for ($i = 0; $i < $num_bytes; $i += 4)
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$str .= pack('L', mt_rand());
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$bytes = "\x00" . $str;
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|
$num = binary_to_long($bytes);
|
|
} while (bccomp($num, $dup) < 0);
|
|
|
|
return bcadd(bcmod($num, $p), 1);
|
|
}
|
|
|
|
function smf_openID_getServerInfo($openid_url)
|
|
{
|
|
global $sourcedir;
|
|
|
|
require_once($sourcedir . '/Subs-Package.php');
|
|
|
|
// Get the html and parse it for the openid variable which will tell us where to go.
|
|
$webdata = fetch_web_data($openid_url);
|
|
|
|
if (empty($webdata))
|
|
return false;
|
|
|
|
$response_data = array();
|
|
|
|
// Some OpenID servers have strange but still valid HTML which makes our job hard.
|
|
if (preg_match_all('~<link([\s\S]*?)/?>~i', $webdata, $link_matches) == 0)
|
|
fatal_lang_error('openid_server_bad_response');
|
|
|
|
foreach ($link_matches[1] as $link_match)
|
|
{
|
|
if (preg_match('~rel="([\s\S]*?)"~i', $link_match, $rel_match) == 0 || preg_match('~href="([\s\S]*?)"~i', $link_match, $href_match) == 0)
|
|
continue;
|
|
|
|
$rels = preg_split('~\s+~', $rel_match[1]);
|
|
foreach ($rels as $rel)
|
|
if (preg_match('~openid2?\.(server|delegate|provider)~i', $rel, $match) != 0)
|
|
$response_data[$match[1]] = $href_match[1];
|
|
}
|
|
|
|
if (empty($response_data['server']))
|
|
if (empty($response_data['provider']))
|
|
fatal_lang_error('openid_server_bad_response');
|
|
else
|
|
$response_data['server'] = $response_data['provider'];
|
|
|
|
return $response_data;
|
|
}
|
|
|
|
function sha1_hmac($data, $key)
|
|
{
|
|
|
|
if (strlen($key) > 64)
|
|
$key = sha1_raw($key);
|
|
|
|
// Pad the key if need be.
|
|
$key = str_pad($key, 64, chr(0x00));
|
|
$ipad = str_repeat(chr(0x36), 64);
|
|
$opad = str_repeat(chr(0x5c), 64);
|
|
$hash1 = sha1_raw(($key ^ $ipad) . $data);
|
|
$hmac = sha1_raw(($key ^ $opad) . $hash1);
|
|
return $hmac;
|
|
}
|
|
|
|
function sha1_raw($text)
|
|
{
|
|
if (version_compare(PHP_VERSION, '5.0.0') >= 0)
|
|
return sha1($text, true);
|
|
|
|
$hex = sha1($text);
|
|
$raw = '';
|
|
for ($i = 0; $i < 40; $i += 2)
|
|
{
|
|
$hexcode = substr($hex, $i, 2);
|
|
$charcode = (int) base_convert($hexcode, 16, 10);
|
|
$raw .= chr($charcode);
|
|
}
|
|
|
|
return $raw;
|
|
}
|
|
|
|
function binary_to_long($str)
|
|
{
|
|
$bytes = array_merge(unpack('C*', $str));
|
|
|
|
$n = 0;
|
|
|
|
foreach ($bytes as $byte)
|
|
{
|
|
$n = bcmul($n, 256);
|
|
$n = bcadd($n, $byte);
|
|
}
|
|
|
|
return $n;
|
|
}
|
|
|
|
function long_to_binary($value)
|
|
{
|
|
$cmp = bccomp($value, 0);
|
|
if ($cmp < 0)
|
|
fatal_error('Only non-negative integers allowed.');
|
|
|
|
if ($cmp == 0)
|
|
return "\x00";
|
|
|
|
$bytes = array();
|
|
|
|
while (bccomp($value, 0) > 0)
|
|
{
|
|
array_unshift($bytes, bcmod($value, 256));
|
|
$value = bcdiv($value, 256);
|
|
}
|
|
|
|
if ($bytes && ($bytes[0] > 127))
|
|
array_unshift($bytes, 0);
|
|
|
|
$return = '';
|
|
foreach ($bytes as $byte)
|
|
$return .= pack('C', $byte);
|
|
|
|
return $return;
|
|
}
|
|
|
|
function binary_xor($num1, $num2)
|
|
{
|
|
$return = '';
|
|
|
|
for ($i = 0; $i < strlen($num2); $i++)
|
|
$return .= $num1[$i] ^ $num2[$i];
|
|
|
|
return $return;
|
|
}
|
|
|
|
// PHP 4 didn't have bcpowmod.
|
|
if (!function_exists('bcpowmod') && function_exists('bcpow'))
|
|
{
|
|
function bcpowmod($num1, $num2, $num3)
|
|
{
|
|
return bcmod(bcpow($num1, $num2), $num3);
|
|
}
|
|
}
|
|
|
|
?>
|