/**
* Grant or deny a requested access token.
* This would be called from the "/token" endpoint as defined in the spec.
* You can call your endpoint whatever you want.
*
* @param $request - OAuth2_RequestInterface
* Request object to grant access token
* @param $grantType - mixed
* OAuth2_GrantTypeInterface instance or one of the grant types configured in the constructor
*
* @throws InvalidArgumentException
* @throws LogicException
*
* @see http://tools.ietf.org/html/rfc6749#section-4
* @see http://tools.ietf.org/html/rfc6749#section-10.6
* @see http://tools.ietf.org/html/rfc6749#section-4.1.3
*
* @ingroup oauth2_section_4
*/
public function grantAccessToken(OAuth2_RequestInterface $request, OAuth2_ResponseInterface $response)
{
if (strtolower($request->server('REQUEST_METHOD')) != 'post') {
$response->setError(405, 'invalid_request', 'The request method must be POST when requesting an access token', '#section-3.2');
$response->addHttpHeaders(array('Allow' => 'POST'));
return null;
}
/* Determine grant type from request
* and validate the request for that grant type
*/
if (!($grantTypeIdentifier = $request->request('grant_type'))) {
$response->setError(400, 'invalid_request', 'The grant type was not specified in the request');
return null;
}
if (!isset($this->grantTypes[$grantTypeIdentifier])) {
/* TODO: If this is an OAuth2 supported grant type that we have chosen not to implement, throw a 501 Not Implemented instead */
$response->setError(400, 'unsupported_grant_type', sprintf('Grant type "%s" not supported', $grantTypeIdentifier));
return null;
}
$grantType = $this->grantTypes[$grantTypeIdentifier];
if (!$grantType->validateRequest($request, $response)) {
return null;
}
/* Retrieve the client information from the request
* ClientAssertionTypes allow for grant types which also assert the client data
* in which case ClientAssertion is handled in the validateRequest method
*
* @see OAuth2_GrantType_JWTBearer
* @see OAuth2_GrantType_ClientCredentials
*/
if ($grantType instanceof OAuth2_ClientAssertionTypeInterface) {
$clientId = $grantType->getClientId();
} else {
if (!$this->clientAssertionType->validateRequest($request, $response)) {
return null;
}
$clientId = $this->clientAssertionType->getClientId();
// validate the Client ID (if applicable)
if (!is_null($storedClientId = $grantType->getClientId()) && $storedClientId != $clientId) {
$response->setError(400, 'invalid_grant', sprintf('%s doesn\'t exist or is invalid for the client', $grantTypeIdentifier));
return null;
}
}
/*
* Validate the scope of the token
* If the grant type returns a value for the scope,
* this value must be verified with the scope being requested
*/
$availableScope = $grantType->getScope();
if (!($requestedScope = $this->scopeUtil->getScopeFromRequest($request))) {
$requestedScope = $availableScope ? $availableScope : $this->scopeUtil->getDefaultScope();
}
if ($requestedScope && !$this->scopeUtil->scopeExists($requestedScope, $clientId) || $availableScope && !$this->scopeUtil->checkScope($requestedScope, $availableScope)) {
$response->setError(400, 'invalid_scope', 'An unsupported scope was requested');
return null;
}
return $grantType->createAccessToken($this->accessToken, $clientId, $grantType->getUserId(), $requestedScope);
}
