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<?php |
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namespace PhalconExt\Http\Middleware; |
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use Phalcon\Http\Request; |
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use Phalcon\Http\Response; |
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use PhalconExt\Contract\ApiAuthenticator; |
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use PhalconExt\Factory\ApiAuthenticator as FactoryAuthenticator; |
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use PhalconExt\Http\BaseMiddleware; |
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/** |
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* Check authentication &/or authorization for api requests. |
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* |
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* @author Jitendra Adhikari <[email protected]> |
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* @license MIT |
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* |
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* @link https://github.com/adhocore/phalcon-ext |
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*/ |
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class ApiAuth extends BaseMiddleware |
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{ |
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protected $configKey = 'apiAuth'; |
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/** @var ApiAuthenticator */ |
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protected $authenticator; |
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public function __construct(ApiAuthenticator $authenticator = null) |
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{ |
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parent::__construct(); |
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$this->authenticator = $authenticator ?? $this->di(FactoryAuthenticator::class); |
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if (!$this->di()->has('authenticator')) { |
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$this->di()->setShared('authenticator', $this->authenticator); |
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} |
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$this->authenticator->configure($this->config); |
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} |
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/** |
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* Handle authentication. |
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* |
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* @param Request $request |
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* @param Response $response |
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* |
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* @return bool |
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*/ |
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public function before(Request $request, Response $response): bool |
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{ |
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list($routeName, $currentUri) = $this->getRouteNameUri(); |
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if ($this->shouldGenerate($request, $currentUri)) { |
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return $this->generateToken($request); |
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} |
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$requiredScope = $this->config['scopes'][$routeName] ?? $this->config['scopes'][$currentUri] ?? null; |
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return $this->validateScope($request, $requiredScope); |
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} |
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protected function shouldGenerate(Request $request, string $currentUri): bool |
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{ |
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return $request->isPost() && $this->config['authUri'] === $currentUri; |
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} |
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protected function generateToken(Request $request) |
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{ |
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$payload = $request->getJsonRawBody(true) ?: $request->getPost(); |
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if (!$this->validateGenerate($payload)) { |
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return $this->abort(401, 'Credentials missing'); |
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} |
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if (!$this->authenticate($payload)) { |
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return $this->abort(401, 'Credentials invalid'); |
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} |
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return $this->serve($payload['grant_type']); |
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} |
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protected function validateGenerate(array $payload): bool |
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{ |
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if (!isset($payload['grant_type'], $payload[$payload['grant_type']])) { |
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return false; |
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} |
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if (!\in_array($payload['grant_type'], ['password', 'refresh_token'])) { |
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return false; |
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} |
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return 'password' !== $payload['grant_type'] || isset($payload['username']); |
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} |
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protected function authenticate(array $payload): bool |
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{ |
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if ('refresh_token' === $payload['grant_type']) { |
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return $this->authenticator->byRefreshToken($payload['refresh_token']); |
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} |
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return $this->authenticator->byCredential($payload['username'], $payload['password']); |
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} |
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protected function serve(string $grantType): bool |
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{ |
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$token = [ |
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'access_token' => $this->createJWT(), |
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'token_type' => 'bearer', |
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'expires_in' => $this->config['jwt']['maxAge'], |
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'grant_type' => $grantType, |
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]; |
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if ($grantType === 'password') { |
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$token['refresh_token'] = $this->authenticator->createRefreshToken(); |
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} |
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return $this->abort(200, $token); |
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} |
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protected function createJWT(): string |
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{ |
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$jwt = [ |
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'sub' => $this->authenticator->getSubject(), |
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'scopes' => $this->authenticator->getScopes(), |
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]; |
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if ($this->config['jwt']['issuer'] ?? null) { |
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$jwt['iss'] = $this->config['jwt']['issuer']; |
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} |
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// 'exp' is automatically added based on `config->apiAuth->jwt->maxAge`! |
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return $this->di('jwt')->encode($jwt); |
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} |
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protected function validateScope(Request $request, string $requiredScope = null): bool |
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{ |
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$claimedScopes = []; |
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$msg = 'Permission denied'; |
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$jwt = $request->getHeader('Authorization'); |
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try { |
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$claimedScopes = $this->getClaimedScopes($jwt); |
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} catch (\InvalidArgumentException $e) { |
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$msg = $e->getMessage(); |
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} |
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if ($requiredScope && !\in_array($requiredScope, $claimedScopes)) { |
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return $this->abort(403, $msg); |
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} |
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return true; |
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} |
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protected function getClaimedScopes(string $jwt = null): array |
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{ |
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if ('' === $jwt = \str_replace('Bearer ', '', \trim($jwt))) { |
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return []; |
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} |
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$decoded = $this->di('jwt')->decode($jwt); |
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if ($decoded['sub'] ?? null) { |
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$this->authenticator->bySubject($decoded['sub']); |
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} |
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return $decoded['scopes'] ?? []; |
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} |
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} |
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adhocore /
phalcon-ext
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