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Move checkSSO() from Context class to Session class

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This commit is contained in:
Kijin Sung 2017-02-07 23:26:43 +09:00
parent 483ac84796
commit af41f36bf7
3 changed files with 106 additions and 92 deletions
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101
common/framework/session.php
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@ -108,7 +108,11 @@ class Session
// Validate the HTTP key.
if (isset($_SESSION['RHYMIX']) && $_SESSION['RHYMIX'])
{
if ($_SESSION['RHYMIX']['keys'][$domain]['key1'] === $key1 && $key1 !== null)
if (!isset($_SESSION['RHYMIX']['keys'][$domain]) && config('use_sso'))
{
$must_refresh = true;
}
elseif ($_SESSION['RHYMIX']['keys'][$domain]['key1'] === $key1 && $key1 !== null)
{
// OK
}
@ -220,6 +224,95 @@ class Session
return false;
}
/**
* Check if this session needs to be shared with another site with SSO.
*
* This method uses more or less the same logic as XE's SSO mechanism.
* It may need to be changed to a more secure mechanism later.
*
* @return bool
*/
public static function checkSSO()
{
// Abort if SSO is disabled, the visitor is a robot, or this is not a typical GET request.
if ($_SERVER['REQUEST_METHOD'] !== 'GET' || !config('use_sso') || UA::isRobot() || in_array(\Context::get('act'), array('rss', 'atom')))
{
return false;
}
// Abort of the default URL is not set.
$default_url = \Context::getDefaultUrl();
if (!$default_url)
{
return false;
}
// Get the current site information.
$current_url = URL::getCurrentURL();
$current_host = parse_url($current_url, \PHP_URL_HOST);
$default_host = parse_url($default_url, \PHP_URL_HOST);
// Step 1: if the current site is not the default site, send SSO validation request to the default site.
if($default_host !== $current_host && !\Context::get('sso_response') && $_COOKIE['sso'] !== md5($current_host))
{
// Set sso cookie to prevent multiple simultaneous SSO validation requests.
setcookie('sso', md5($current_host), 0, '/');
// Redirect to the default site.
$sso_request = Security::encrypt($current_url);
header('Location:' . URL::modifyURL($default_url, array('sso_request' => $sso_request)));
return true;
}
// Step 2: receive and process SSO validation request at the default site.
if($default_host === $current_host && \Context::get('sso_request'))
{
// Get the URL of the origin site
$sso_request = Security::decrypt(\Context::get('sso_request'));
if (!$sso_request || !preg_match('!^https?://!', $sso_request))
{
\Context::displayErrorPage('SSO Error', 'Invalid SSO Request', 400);
return true;
}
// Redirect back to the origin site.
$sso_response = Security::encrypt(session_id());
header('Location: ' . URL::modifyURL($sso_request, array('sso_response' => $sso_response)));
return true;
}
// Step 3: back at the origin site, set session ID to be the same as the default site.
if($default_host !== $current_host && \Context::get('sso_response'))
{
// Check SSO response
$sso_response = Security::decrypt(\Context::get('sso_response'));
if ($sso_response === false)
{
\Context::displayErrorPage('SSO Error', 'Invalid SSO Response', 400);
return true;
}
// Check that the response was given by the default site (to prevent session fixation CSRF).
if(isset($_SERVER['HTTP_REFERER']) && strpos($_SERVER['HTTP_REFERER'], $default_url) !== 0)
{
\Context::displayErrorPage('SSO Error', 'Invalid SSO Response', 400);
return true;
}
// Set session ID.
self::close();
session_id($sso_response);
self::start();
// Finally, redirect to the originally requested URL.
header('Location: ' . URL::getCurrentURL(array('sso_response' => null)));
return true;
}
// If none of the conditions above apply, proceed normally.
return false;
}
/**
* Create the data structure for a new Rhymix session.
*
@ -261,6 +354,12 @@ class Session
// Get session parameters.
list($lifetime, $refresh_interval, $domain, $path) = self::_getParams();
// Set the domain initialization timestamp.
if (!isset($_SESSION['RHYMIX']['keys'][$domain]['started']))
{
$_SESSION['RHYMIX']['keys'][$domain]['started'] = time();
}
// Reset the trusted information.
if (!isset($_SESSION['RHYMIX']['keys'][$domain]['trusted']))
{