website_jukni/forum/Sources/Subs-OpenID.php

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