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<?php
namespace OAuth2\ResponseType;
use OAuth2\Storage\AuthorizationCodeInterface as AuthorizationCodeStorageInterface;
/**
* @author Brent Shaffer <bshafs at gmail dot com>
*/
class AuthorizationCode implements AuthorizationCodeInterface
{
protected $storage;
protected $config;
public function __construct(AuthorizationCodeStorageInterface $storage, array $config = array())
{
$this->storage = $storage;
$this->config = array_merge(array(
'enforce_redirect' => false,
'auth_code_lifetime' => 30,
), $config);
}
public function getAuthorizeResponse($params, $user_id = null)
{
// build the URL to redirect to
$result = array('query' => array());
$params += array('scope' => null, 'state' => null, 'code_challenge' => null, 'code_challenge_method' => null);
$result['query']['code'] = $this->createAuthorizationCode($params['client_id'], $user_id, $params['redirect_uri'], $params['scope'], $params['code_challenge'], $params['code_challenge_method']);
if (isset($params['state'])) {
$result['query']['state'] = $params['state'];
}
return array($params['redirect_uri'], $result);
}
/**
* Handle the creation of the authorization code.
*
* @param $client_id
* Client identifier related to the authorization code
* @param $user_id
* User ID associated with the authorization code
* @param $redirect_uri
* An absolute URI to which the authorization server will redirect the
* user-agent to when the end-user authorization step is completed.
* @param $scope
* (optional) Scopes to be stored in space-separated string.
*
* @see http://tools.ietf.org/html/rfc6749#section-4
* @ingroup oauth2_section_4
*/
public function createAuthorizationCode($client_id, $user_id, $redirect_uri, $scope = null, $code_challenge = null, $code_challenge_method = null)
{
$code = $this->generateAuthorizationCode();
$this->storage->setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, time() + $this->config['auth_code_lifetime'], $scope, null, $code_challenge, $code_challenge_method);
return $code;
}
/**
* @return
* TRUE if the grant type requires a redirect_uri, FALSE if not
*/
public function enforceRedirect()
{
return $this->config['enforce_redirect'];
}
/**
* Generates an unique auth code.
*
* Implementing classes may want to override this function to implement
* other auth code generation schemes.
*
* @return
* An unique auth code.
*
* @ingroup oauth2_section_4
*/
protected function generateAuthorizationCode()
{
$tokenLen = 40;
if (function_exists('random_bytes')) {
$randomData = random_bytes(100);
} elseif (function_exists('openssl_random_pseudo_bytes')) {
$randomData = openssl_random_pseudo_bytes(100);
} elseif (function_exists('mcrypt_create_iv')) {
$randomData = mcrypt_create_iv(100, MCRYPT_DEV_URANDOM);
} elseif (@file_exists('/dev/urandom')) { // Get 100 bytes of random data
$randomData = file_get_contents('/dev/urandom', false, null, 0, 100) . uniqid(mt_rand(), true);
} else {
$randomData = mt_rand() . mt_rand() . mt_rand() . mt_rand() . microtime(true) . uniqid(mt_rand(), true);
}
return substr(hash('sha512', $randomData), 0, $tokenLen);
}
}
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