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<?php
/**
* Authenticate using LiveID.
*
* @author Brook Schofield, TERENA.
* @author Guy Halse, TENET.
* @package SimpleSAMLphp
*/
class sspmod_authwindowslive_Auth_Source_LiveID extends SimpleSAML_Auth_Source
{
/**
* The string used to identify our states.
*/
const STAGE_INIT = 'authwindowslive:init';
/**
* The key of the AuthId field in the state.
*/
const AUTHID = 'authwindowslive:AuthId';
private $key;
private $secret;
/**
* Constructor for this authentication source.
*
* @param array $info Information about this authentication source.
* @param array $config Configuration.
*
* @throws Exception In case of misconfiguration.
*/
public function __construct($info, $config)
{
assert('is_array($info)');
assert('is_array($config)');
// Call the parent constructor first, as required by the interface
parent::__construct($info, $config);
if (!array_key_exists('key', $config)) {
throw new Exception('LiveID authentication source is not properly configured: missing [key]');
}
$this->key = $config['key'];
if (!array_key_exists('secret', $config)) {
throw new Exception('LiveID authentication source is not properly configured: missing [secret]');
}
$this->secret = $config['secret'];
}
/**
* Log-in using LiveID platform
*
* @param array &$state Information about the current authentication.
*/
public function authenticate(&$state)
{
assert('is_array($state)');
// we are going to need the authId in order to retrieve this authentication source later
$state[self::AUTHID] = $this->authId;
$stateID = SimpleSAML_Auth_State::saveState($state, self::STAGE_INIT);
SimpleSAML_Logger::debug('authwindowslive auth state id = ' . $stateID);
// authenticate the user
// documentation at:
// https://azure.microsoft.com/en-us/documentation/articles/active-directory-v2-protocols-oauth-code/
$authorizeURL = 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize'
. '?client_id=' . $this->key
. '&response_type=code'
. '&response_mode=query'
. '&redirect_uri=' . urlencode(SimpleSAML_Module::getModuleUrl('authwindowslive') . '/linkback.php')
. '&state=' . urlencode($stateID)
. '&scope=' . urlencode('openid https://graph.microsoft.com/user.read')
;
\SimpleSAML\Utils\HTTP::redirectTrustedURL($authorizeURL);
}
/**
* @param $state
*
* @throws Exception
*/
public function finalStep(&$state)
{
SimpleSAML_Logger::debug(
"authwindowslive oauth: Using this verification code [".$state['authwindowslive:verification_code']."]"
);
// retrieve Access Token
// documentation at:
// https://azure.microsoft.com/en-us/documentation/articles/active-directory-v2-protocols-oauth-code/#request-an-access-token
$postData = 'client_id=' . urlencode($this->key)
. '&client_secret=' . urlencode($this->secret)
. '&scope=' . urlencode('https://graph.microsoft.com/user.read')
. '&grant_type=authorization_code'
. '&redirect_uri=' . urlencode(SimpleSAML_Module::getModuleUrl('authwindowslive') . '/linkback.php')
. '&code=' . urlencode($state['authwindowslive:verification_code']);
$context = array(
'http' => array(
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => $postData,
),
);
$result = \SimpleSAML\Utils\HTTP::fetch('https://login.microsoftonline.com/common/oauth2/v2.0/token', $context);
$response = json_decode($result, true);
// error checking of $response to make sure we can proceed
if (!array_key_exists('access_token', $response)) {
throw new Exception(
'['.$response['error'].'] '.$response['error_description'].
"\r\nNo access_token returned - cannot proceed\r\n" . implode(', ', $response['error_codes'])
);
}
SimpleSAML_Logger::debug(
"authwindowslive: Got an access token from the OAuth service provider [".$response['access_token']."]"
);
// documentation at: http://graph.microsoft.io/en-us/docs/overview/call_api
$opts = array('http' => array('header' => "Accept: application/json\r\nAuthorization: Bearer ".
$response['access_token']."\r\n"));
$data = \SimpleSAML\Utils\HTTP::fetch('https://graph.microsoft.com/v1.0/me', $opts);
$userdata = json_decode($data, true);
// this is the simplest case
if (!array_key_exists('@odata.context', $userdata) || array_key_exists('error', $userdata)) {
throw new Exception(
'Unable to retrieve userdata from Microsoft Graph ['.$userdata['error']['code'].'] '.
$userdata['error']['message']
);
}
$attributes = array();
$attributes['windowslive_targetedID'] = array(
'https://graph.microsoft.com!'.(!empty($userdata['id']) ? $userdata['id'] : 'unknown')
);
foreach ($userdata as $key => $value) {
if (is_string($value)) {
$attributes['windowslive.' . $key] = array((string)$value);
}
}
SimpleSAML_Logger::debug('LiveID Returned Attributes: '. implode(", ", array_keys($attributes)));
$state['Attributes'] = $attributes;
}
}
|
