/**
* Implementation of https://tools.ietf.org/html/draft-richer-oauth-introspection
*/
private function _introspectToken(array $param)
{
$r = array();
$token = Utils::getParameter($param, 'token');
if (NULL === $token) {
throw new TokenIntrospectionException("invalid_token", "the token parameter is missing");
}
$accessToken = $this->_storage->getAccessToken($token);
if (FALSE === $accessToken) {
// token does not exist
$r['active'] = FALSE;
} elseif (time() > $accessToken['issue_time'] + $accessToken['expires_in']) {
// token expired
$r['active'] = FALSE;
} else {
// token exists and did not expire
$r['active'] = TRUE;
$r['exp'] = intval($accessToken['issue_time'] + $accessToken['expires_in']);
$r['iat'] = intval($accessToken['issue_time']);
$r['scope'] = $accessToken['scope'];
$r['client_id'] = $accessToken['client_id'];
$r['sub'] = $accessToken['resource_owner_id'];
$r['token_type'] = 'bearer';
// as long as we have no RS registration we cannot set the audience...
// $response['aud'] = 'foo';
// add proprietary "x-entitlement"
$resourceOwner = $this->_storage->getResourceOwner($accessToken['resource_owner_id']);
if (isset($resourceOwner['entitlement'])) {
$e = Json::dec($resourceOwner['entitlement']);
if (0 !== count($e)) {
$r['x-entitlement'] = $e;
}
}
// add proprietary "x-ext"
if (isset($resourceOwner['ext'])) {
$e = Json::dec($resourceOwner['ext']);
if (0 !== count($e)) {
$r['x-ext'] = $e;
}
}
}
return $r;
}
private function _handleApprove(IResourceOwner $resourceOwner, array $get, array $post)
{
try {
$clientId = Utils::getParameter($get, 'client_id');
$responseType = Utils::getParameter($get, 'response_type');
$redirectUri = Utils::getParameter($get, 'redirect_uri');
$scope = new Scope(Utils::getParameter($get, 'scope'));
$state = Utils::getParameter($get, 'state');
$result = $this->_handleAuthorize($resourceOwner, $get);
if (AuthorizeResult::ASK_APPROVAL !== $result->getAction()) {
return $result;
}
$approval = Utils::getParameter($post, 'approval');
// FIXME: are we sure this client is always valid?
$client = $this->_storage->getClient($clientId);
if ("approve" === $approval) {
$approvedScope = $this->_storage->getApprovalByResourceOwnerId($clientId, $resourceOwner->getId());
if (FALSE === $approvedScope) {
// no approved scope stored yet, new entry
$refreshToken = "code" === $responseType ? Utils::randomHex(16) : NULL;
$this->_storage->addApproval($clientId, $resourceOwner->getId(), $scope->getScope(), $refreshToken);
} else {
$this->_storage->updateApproval($clientId, $resourceOwner->getId(), $scope->getScope());
}
return $this->_handleAuthorize($resourceOwner, $get);
} else {
throw new ClientException("access_denied", "not authorized by resource owner", $client, $state);
}
} catch (ScopeException $e) {
throw new ClientException("invalid_scope", "malformed scope", $client, $state);
}
}
private function _handleToken(array $post, $user = NULL, $pass = NULL)
{
// exchange authorization code for access token
$grantType = Utils::getParameter($post, 'grant_type');
$code = Utils::getParameter($post, 'code');
$redirectUri = Utils::getParameter($post, 'redirect_uri');
$refreshToken = Utils::getParameter($post, 'refresh_token');
$token = Utils::getParameter($post, 'token');
$clientId = Utils::getParameter($post, 'client_id');
$scope = Utils::getParameter($post, 'scope');
if (NULL !== $user && !empty($user) && NULL !== $pass && !empty($pass)) {
// client provided authentication, it MUST be valid now...
$client = $this->_storage->getClient($user);
if (FALSE === $client) {
throw new TokenException("invalid_client", "client authentication failed");
}
// check pass
if ($pass !== $client['secret']) {
throw new TokenException("invalid_client", "client authentication failed");
}
// if client_id in POST is set, it must match the user
if (NULL !== $clientId && $clientId !== $user) {
throw new TokenException("invalid_grant", "client_id inconsistency: authenticating user must match POST body client_id");
}
$hasAuthenticated = TRUE;
} else {
// client provided no authentication, client_id must be in POST body
if (NULL === $clientId || empty($clientId)) {
throw new TokenException("invalid_request", "no client authentication used nor client_id POST parameter");
}
$client = $this->_storage->getClient($clientId);
if (FALSE === $client) {
throw new TokenException("invalid_client", "client identity could not be established");
}
$hasAuthenticated = FALSE;
}
if ("user_agent_based_application" === $client['type']) {
throw new TokenException("unauthorized_client", "this client type is not allowed to use the token endpoint");
}
if ("web_application" === $client['type'] && !$hasAuthenticated) {
// web_application type MUST have authenticated
throw new TokenException("invalid_client", "client authentication failed");
}
if (NULL === $grantType) {
throw new TokenException("invalid_request", "the grant_type parameter is missing");
}
switch ($grantType) {
case "authorization_code":
if (NULL === $code) {
throw new TokenException("invalid_request", "the code parameter is missing");
}
// If the redirect_uri was present in the authorize request, it MUST also be there
// in the token request. If it was not there in authorize request, it MUST NOT be
// there in the token request (this is not explicit in the spec!)
$result = $this->_storage->getAuthorizationCode($client['id'], $code, $redirectUri);
if (FALSE === $result) {
throw new TokenException("invalid_grant", "the authorization code was not found");
}
if (time() > $result['issue_time'] + 600) {
throw new TokenException("invalid_grant", "the authorization code expired");
}
// we MUST be able to delete the authorization code, otherwise it was used before
if (FALSE === $this->_storage->deleteAuthorizationCode($client['id'], $code, $redirectUri)) {
// check to prevent deletion race condition
throw new TokenException("invalid_grant", "this authorization code grant was already used");
}
$approval = $this->_storage->getApprovalByResourceOwnerId($client['id'], $result['resource_owner_id']);
$token = array();
$token['access_token'] = Utils::randomHex(16);
$token['expires_in'] = intval($this->_config->getValue('accessTokenExpiry'));
// we always grant the scope the user authorized, no further restrictions here...
// FIXME: the merging of authorized scopes in the authorize function is a bit of a mess!
// we should deal with that there and come up with a good solution...
$token['scope'] = $result['scope'];
$token['refresh_token'] = $approval['refresh_token'];
$token['token_type'] = "bearer";
$this->_storage->storeAccessToken($token['access_token'], time(), $client['id'], $result['resource_owner_id'], $token['scope'], $token['expires_in']);
break;
case "refresh_token":
if (NULL === $refreshToken) {
throw new TokenException("invalid_request", "the refresh_token parameter is missing");
}
$result = $this->_storage->getApprovalByRefreshToken($client['id'], $refreshToken);
if (FALSE === $result) {
throw new TokenException("invalid_grant", "the refresh_token was not found");
}
$token = array();
$token['access_token'] = Utils::randomHex(16);
$token['expires_in'] = intval($this->_config->getValue('accessTokenExpiry'));
if (NULL !== $scope) {
// the client wants to obtain a specific scope
$requestedScope = new Scope($scope);
$authorizedScope = new Scope($result['scope']);
if ($requestedScope->isSubsetOf($authorizedScope)) {
// if it is a subset of the authorized scope we honor that
$token['scope'] = $requestedScope->getScope();
} else {
// if not the client gets the authorized scope
$token['scope'] = $result['scope'];
}
} else {
$token['scope'] = $result['scope'];
}
$token['token_type'] = "bearer";
$this->_storage->storeAccessToken($token['access_token'], time(), $client['id'], $result['resource_owner_id'], $token['scope'], $token['expires_in']);
break;
default:
throw new TokenException("unsupported_grant_type", "the requested grant type is not supported");
}
return $token;
}