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<?php
namespace SimpleSAML\Module\authwindowslive\Auth\Source;
/**
* Authenticate using LiveID.
*
* @author Brook Schofield, TERENA.
* @author Guy Halse, TENET.
* @package SimpleSAMLphp
*/
class 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';
/** @var string */
private $key;
/** @var string */
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.
* @return void
*/
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 array &$state
* @return void
* @throws \Exception
*/
public function finalStep(&$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 = [
'http' => [
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => $postData,
],
];
/** @var string $result */
$result = \SimpleSAML\Utils\HTTP::fetch('https://login.microsoftonline.com/common/oauth2/v2.0/token', $context, false);
$response = json_decode($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 = [
'http' => ['header' => "Accept: application/json\r\nAuthorization: Bearer ".
$response['access_token']."\r\n"]
];
/** @var string $data */
$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 = [];
$attributes['windowslive_targetedID'] = [
'https://graph.microsoft.com!'.(!empty($userdata['id']) ? $userdata['id'] : 'unknown')
];
foreach ($userdata as $key => $value) {
if (is_string($value)) {
$attributes['windowslive.'.$key] = [(string) $value];
}
}
\SimpleSAML\Logger::debug('LiveID Returned Attributes: '.implode(", ", array_keys($attributes)));
$state['Attributes'] = $attributes;
}
}
|
