/**
* {@inheritDoc}
*/
public function createTokenResponse(ServerRequestInterface $request, Client $client = null, TokenOwnerInterface $owner = null) : ResponseInterface
{
$postParams = $request->getParsedBody();
$refreshToken = $postParams['refresh_token'] ?? null;
if (null === $refreshToken) {
throw OAuth2Exception::invalidRequest('Refresh token is missing');
}
// We can fetch the actual token, and validate it
/** @var RefreshToken $refreshToken */
$refreshToken = $this->refreshTokenService->getToken((string) $refreshToken);
if (null === $refreshToken || $refreshToken->isExpired()) {
throw OAuth2Exception::invalidGrant('Refresh token is expired');
}
// We can now create a new access token! First, we need to make some checks on the asked scopes,
// because according to the spec, a refresh token can create an access token with an equal or lesser
// scope, but not more
$scopes = $postParams['scope'] ?? $refreshToken->getScopes();
if (!$refreshToken->matchScopes($scopes)) {
throw OAuth2Exception::invalidScope('The scope of the new access token exceeds the scope(s) of the refresh token');
}
$owner = $refreshToken->getOwner();
$accessToken = $this->accessTokenService->createToken($owner, $client, $scopes);
// We may want to revoke the old refresh token
if ($this->serverOptions->getRotateRefreshTokens()) {
if ($this->serverOptions->getRevokeRotatedRefreshTokens()) {
$this->refreshTokenService->deleteToken($refreshToken);
}
$refreshToken = $this->refreshTokenService->createToken($owner, $client, $scopes);
}
// We can generate the response!
return $this->prepareTokenResponse($accessToken, $refreshToken, true);
}
/**
* Validate the token scopes against the registered scope
*
* @param array $scopes
* @return void
* @throws OAuth2Exception
*/
protected function validateTokenScopes(array $scopes)
{
$registeredScopes = $this->scopeService->getAll();
foreach ($registeredScopes as &$registeredScope) {
$registeredScope = is_string($registeredScope) ? $registeredScope : $registeredScope->getName();
}
$diff = array_diff($scopes, $registeredScopes);
if (count($diff) > 0) {
throw OAuth2Exception::invalidScope(sprintf('Some scope(s) do not exist: %s', implode(', ', $diff)));
}
}