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Version 3.1.4

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Neo committed 2025-12-19 00:32:22 -08:00
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commit ae5c01cc78
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upload/ips_kernel/facebook-client/facebook.php
+207 -64
View File
@@ -1,5 +1,5 @@
<?php
// Copyright 2004-2008 Facebook. All Rights Reserved.
// Copyright 2004-2009 Facebook. All Rights Reserved.
//
// +---------------------------------------------------------------------------+
// | Facebook Platform PHP5 client |
@@ -30,13 +30,12 @@
// +---------------------------------------------------------------------------+
// | For help with this library, contact developers-help@facebook.com |
// +---------------------------------------------------------------------------+
//
include_once 'facebookapi_php5_restlib.php';
define('FACEBOOK_API_VALIDATION_ERROR', 1);
class Facebook {
public $api_client;
public $api_key;
public $secret;
public $generate_session_secret;
@@ -46,6 +45,8 @@ class Facebook {
public $user;
public $profile_user;
public $canvas_user;
public $ext_perms = array();
protected $base_domain;
/*
* Create a Facebook client like this:
@@ -65,11 +66,26 @@ class Facebook {
$this->api_key = $api_key;
$this->secret = $secret;
$this->generate_session_secret = $generate_session_secret;
$this->api_client = new FacebookRestClient($api_key, $secret);
$this->api_client = new FacebookRestClient($api_key, $secret, null);
$this->validate_fb_params();
// Set the default user id for methods that allow the caller to
// pass an explicit uid instead of using a session key.
$defaultUser = null;
if ($this->user) {
$defaultUser = $this->user;
} else if ($this->profile_user) {
$defaultUser = $this->profile_user;
} else if ($this->canvas_user) {
$defaultUser = $this->canvas_user;
}
$this->api_client->set_user($defaultUser);
if (isset($this->fb_params['friends'])) {
$this->api_client->friends_list = explode(',', $this->fb_params['friends']);
$this->api_client->friends_list =
array_filter(explode(',', $this->fb_params['friends']));
}
if (isset($this->fb_params['added'])) {
$this->api_client->added = $this->fb_params['added'];
@@ -90,17 +106,17 @@ class Facebook {
*
* For nitty-gritty details of when each of these is used, check out
* http://wiki.developers.facebook.com/index.php/Verifying_The_Signature
*
* @param bool resolve_auth_token convert an auth token into a session
*/
public function validate_fb_params($resolve_auth_token=true) {
$this->fb_params = $this->get_valid_fb_params($_POST, 48*3600, 'fb_sig');
public function validate_fb_params() {
$this->fb_params = $this->get_valid_fb_params($_POST, 48 * 3600, 'fb_sig');
// note that with preload FQL, it's possible to receive POST params in
// addition to GET, so use a different prefix to differentiate them
if (!$this->fb_params) {
$fb_params = $this->get_valid_fb_params($_GET, 48*3600, 'fb_sig');
$fb_post_params = $this->get_valid_fb_params($_POST, 48*3600, 'fb_post_sig');
$fb_params = $this->get_valid_fb_params($_GET, 48 * 3600, 'fb_sig');
$fb_post_params = $this->get_valid_fb_params($_POST,
48 * 3600, // 48 hours
'fb_post_sig');
$this->fb_params = array_merge($fb_params, $fb_post_params);
}
@@ -112,6 +128,11 @@ class Facebook {
$this->fb_params['profile_user'] : null;
$this->canvas_user = isset($this->fb_params['canvas_user']) ?
$this->fb_params['canvas_user'] : null;
$this->base_domain = isset($this->fb_params['base_domain']) ?
$this->fb_params['base_domain'] : null;
$this->ext_perms = isset($this->fb_params['ext_perms']) ?
explode(',', $this->fb_params['ext_perms'])
: array();
if (isset($this->fb_params['session_key'])) {
$session_key = $this->fb_params['session_key'];
@@ -125,12 +146,16 @@ class Facebook {
$this->set_user($user,
$session_key,
$expires);
}
// if no Facebook parameters were found in the GET or POST variables,
// then fall back to cookies, which may have cached user information
// Cookies are also used to receive session data via the Javascript API
else if ($cookies =
$this->get_valid_fb_params($_COOKIE, null, $this->api_key)) {
} else if ($cookies =
$this->get_valid_fb_params($_COOKIE, null, $this->api_key)) {
// if no Facebook parameters were found in the GET or POST variables,
// then fall back to cookies, which may have cached user information
// Cookies are also used to receive session data via the Javascript API
$base_domain_cookie = 'base_domain_' . $this->api_key;
if (isset($_COOKIE[$base_domain_cookie])) {
$this->base_domain = $_COOKIE[$base_domain_cookie];
}
// use $api_key . '_' as a prefix for the cookies in case there are
// multiple facebook clients on the same domain.
$expires = isset($cookies['expires']) ? $cookies['expires'] : null;
@@ -138,20 +163,6 @@ class Facebook {
$cookies['session_key'],
$expires);
}
// finally, if we received no parameters, but the 'auth_token' GET var
// is present, then we are in the middle of auth handshake,
// so go ahead and create the session
else if ($resolve_auth_token && isset($_GET['auth_token']) &&
$session = $this->do_get_session($_GET['auth_token'])) {
if ($this->generate_session_secret &&
!empty($session['secret'])) {
$session_secret = $session['secret'];
}
$this->set_user($session['uid'],
$session['session_key'],
$session['expires'],
isset($session_secret) ? $session_secret : null);
}
return !empty($this->fb_params);
}
@@ -186,28 +197,63 @@ class Facebook {
}
}
// Invalidate the session currently being used, and clear any state associated with it
// Invalidate the session currently being used, and clear any state associated
// with it. Note that the user will still remain logged into Facebook.
public function expire_session() {
if ($this->api_client->auth_expireSession()) {
if (!$this->in_fb_canvas() && isset($_COOKIE[$this->api_key . '_user'])) {
$cookies = array('user', 'session_key', 'expires', 'ss');
foreach ($cookies as $name) {
setcookie($this->api_key . '_' . $name, false, time() - 3600);
unset($_COOKIE[$this->api_key . '_' . $name]);
}
setcookie($this->api_key, false, time() - 3600);
unset($_COOKIE[$this->api_key]);
try {
if ($this->api_client->auth_expireSession()) {
$this->clear_cookie_state();
return true;
} else {
return false;
}
// now, clear the rest of the stored state
$this->user = 0;
$this->api_client->session_key = 0;
return true;
} else {
return false;
} catch (Exception $e) {
$this->clear_cookie_state();
}
}
/** Logs the user out of all temporary application sessions as well as their
* Facebook session. Note this will only work if the user has a valid current
* session with the application.
*
* @param string $next URL to redirect to upon logging out
*
*/
public function logout($next) {
$logout_url = $this->get_logout_url($next);
// Clear any stored state
$this->clear_cookie_state();
$this->redirect($logout_url);
}
/**
* Clears any persistent state stored about the user, including
* cookies and information related to the current session in the
* client.
*
*/
public function clear_cookie_state() {
if (!$this->in_fb_canvas() && isset($_COOKIE[$this->api_key . '_user'])) {
$cookies = array('user', 'session_key', 'expires', 'ss');
foreach ($cookies as $name) {
setcookie($this->api_key . '_' . $name,
false,
time() - 3600,
'',
$this->base_domain);
unset($_COOKIE[$this->api_key . '_' . $name]);
}
setcookie($this->api_key, false, time() - 3600, '', $this->base_domain);
unset($_COOKIE[$this->api_key]);
}
// now, clear the rest of the stored state
$this->user = 0;
$this->api_client->session_key = 0;
}
public function redirect($url) {
if ($this->in_fb_canvas()) {
echo '<fb:redirect url="' . $url . '"/>';
@@ -222,7 +268,8 @@ class Facebook {
}
public function in_frame() {
return isset($this->fb_params['in_canvas']) || isset($this->fb_params['in_iframe']);
return isset($this->fb_params['in_canvas'])
|| isset($this->fb_params['in_iframe']);
}
public function in_fb_canvas() {
return isset($this->fb_params['in_canvas']);
@@ -246,11 +293,28 @@ class Facebook {
// require_add and require_install have been removed.
// see http://developer.facebook.com/news.php?blog=1&story=116 for more details
public function require_login() {
if ($user = $this->get_loggedin_user()) {
public function require_login($required_permissions = '') {
$user = $this->get_loggedin_user();
$has_permissions = true;
if ($required_permissions) {
$this->require_frame();
$permissions = array_map('trim', explode(',', $required_permissions));
foreach ($permissions as $permission) {
if (!in_array($permission, $this->ext_perms)) {
$has_permissions = false;
break;
}
}
}
if ($user && $has_permissions) {
return $user;
}
$this->redirect($this->get_login_url(self::current_url(), $this->in_frame()));
$this->redirect(
$this->get_login_url(self::current_url(), $this->in_frame(),
$required_permissions));
}
public function require_frame() {
@@ -260,7 +324,7 @@ class Facebook {
}
public static function get_facebook_url($subdomain='www') {
return 'http://' . $subdomain . '.new.facebook.com';
return 'http://' . $subdomain . '.facebook.com';
}
public function get_install_url($next=null) {
@@ -269,14 +333,43 @@ class Facebook {
}
public function get_add_url($next=null) {
return self::get_facebook_url().'/add.php?api_key='.$this->api_key .
($next ? '&next=' . urlencode($next) : '');
$page = self::get_facebook_url().'/add.php';
$params = array('api_key' => $this->api_key);
if ($next) {
$params['next'] = $next;
}
return $page . '?' . http_build_query($params);
}
public function get_login_url($next, $canvas) {
return self::get_facebook_url().'/login.php?v=1.0&api_key=' . $this->api_key .
($next ? '&next=' . urlencode($next) : '') .
($canvas ? '&canvas' : '');
public function get_login_url($next, $canvas, $req_perms = '') {
$page = self::get_facebook_url().'/login.php';
$params = array('api_key' => $this->api_key,
'v' => '1.0',
'req_perms' => $req_perms);
if ($next) {
$params['next'] = $next;
}
if ($canvas) {
$params['canvas'] = '1';
}
return $page . '?' . http_build_query($params);
}
public function get_logout_url($next) {
$page = self::get_facebook_url().'/logout.php';
$params = array('app_key' => $this->api_key,
'session_key' => $this->api_client->session_key);
if ($next) {
$params['connect_next'] = 1;
$params['next'] = $next;
}
return $page . '?' . http_build_query($params);
}
public function set_user($user, $session_key, $expires=null, $session_secret=null) {
@@ -299,13 +392,20 @@ class Facebook {
if ($session_secret != null) {
$cookies['ss'] = $session_secret;
}
foreach ($cookies as $name => $val) {
setcookie($this->api_key . '_' . $name, $val, (int)$expires);
setcookie($this->api_key . '_' . $name, $val, (int)$expires, '', $this->base_domain);
$_COOKIE[$this->api_key . '_' . $name] = $val;
}
$sig = self::generate_sig($cookies, $this->secret);
setcookie($this->api_key, $sig, (int)$expires);
setcookie($this->api_key, $sig, (int)$expires, '', $this->base_domain);
$_COOKIE[$this->api_key] = $sig;
if ($this->base_domain != null) {
$base_domain_cookie = 'base_domain_' . $this->api_key;
setcookie($base_domain_cookie, $this->base_domain, (int)$expires, '', $this->base_domain);
$_COOKIE[$base_domain_cookie] = $this->base_domain;
}
}
/**
@@ -376,7 +476,20 @@ class Facebook {
return $fb_params;
}
/*
/**
* Validates the account that a user was trying to set up an
* independent account through Facebook Connect.
*
* @param user The user attempting to set up an independent account.
* @param hash The hash passed to the reclamation URL used.
* @return bool True if the user is the one that selected the
* reclamation link.
*/
public function verify_account_reclamation($user, $hash) {
return $hash == md5($user . $this->secret);
}
/**
* Validates that a given set of parameters match their signature.
* Parameters all match a given input prefix, such as "fb_sig".
*
@@ -388,6 +501,37 @@ class Facebook {
return self::generate_sig($fb_params, $this->secret) == $expected_sig;
}
/**
* Validate the given signed public session data structure with
* public key of the app that
* the session proof belongs to.
*
* @param $signed_data the session info that is passed by another app
* @param string $public_key Optional public key of the app. If this
* is not passed, function will make an API call to get it.
* return true if the session proof passed verification.
*/
public function verify_signed_public_session_data($signed_data,
$public_key = null) {
// If public key is not already provided, we need to get it through API
if (!$public_key) {
$public_key = $this->api_client->auth_getAppPublicKey(
$signed_data['api_key']);
}
// Create data to verify
$data_to_serialize = $signed_data;
unset($data_to_serialize['sig']);
$serialized_data = implode('_', $data_to_serialize);
// Decode signature
$signature = base64_decode($signed_data['sig']);
$result = openssl_verify($serialized_data, $signature, $public_key,
OPENSSL_ALGO_SHA1);
return $result == 1;
}
/*
* Generate a signature using the application secret key.
*
@@ -462,4 +606,3 @@ class Facebook {
}