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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of Biurad opensource projects. |
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* |
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* PHP version 7.4 and above required |
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* |
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* @author Divine Niiquaye Ibok <[email protected]> |
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* @copyright 2019 Biurad Group (https://biurad.com/) |
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* @license https://opensource.org/licenses/BSD-3-Clause License |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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*/ |
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namespace Biurad\Security\Authenticator; |
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use Biurad\Security\Interfaces\AuthenticatorInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Log\LoggerInterface; |
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use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken; |
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use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface; |
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use Symfony\Component\Security\Core\Authentication\Token\SwitchUserToken; |
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use Symfony\Component\Security\Core\Authentication\Token\TokenInterface; |
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use Symfony\Component\Security\Core\Exception\AuthenticationException; |
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use Symfony\Component\Security\Core\User\UserProviderInterface; |
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/** |
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* This authenticator authenticates a remote user. (example by the |
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* webserver) X.509 certificates. |
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* |
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* @author Divine Niiquaye Ibok <[email protected]> |
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*/ |
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class RemoteUserAuthenticator implements AuthenticatorInterface |
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{ |
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private string $userKey; |
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private string $credentialsKey; |
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private UserProviderInterface $userProvider; |
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private TokenStorageInterface $tokenStorage; |
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private ?LoggerInterface $logger; |
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public function __construct( |
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UserProviderInterface $userProvider, |
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TokenStorageInterface $tokenStorage, |
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string $userKey = 'SSL_CLIENT_S_DN_Email', |
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string $credentialsKey = 'SSL_CLIENT_S_DN', |
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LoggerInterface $logger = null |
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) { |
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$this->userKey = $userKey; |
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$this->credentialsKey = $credentialsKey; |
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$this->userProvider = $userProvider; |
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$this->tokenStorage = $tokenStorage; |
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$this->logger = $logger; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function setToken(?TokenInterface $token): void |
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{ |
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if (null !== $token) { |
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$this->tokenStorage->setToken($token); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function supports(ServerRequestInterface $request): bool |
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{ |
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$token = $this->tokenStorage->getToken(); |
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if (null !== $token && !$token instanceof PreAuthenticatedToken) { |
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return $request->hasHeader('AUTH-SWITCH-USER'); |
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} |
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if (!$username = ($request->getServerParams()[$this->userKey] ?? null)) { |
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$username = $request->getServerParams()[$this->credentialsKey] ?? null; |
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if (null !== $username && \preg_match('#emailAddress=([^,/@]++@[^,/]++)#', $username, $matches)) { |
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$username = $matches[1]; |
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} |
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} |
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if (null === $username) { |
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$this->clearToken($token); |
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if (null !== $this->logger) { |
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$this->logger->debug('Skipping pre-authenticated authenticator no username could be extracted.', ['authenticator' => static::class]); |
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} |
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return false; |
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} |
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// do not overwrite already stored tokens from the same user (i.e. from the session) |
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if ($token instanceof PreAuthenticatedToken && $token->getUserIdentifier() === $username) { |
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if (null !== $this->logger) { |
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$this->logger->debug('Skipping pre-authenticated authenticator as the user already has an existing session.', ['authenticator' => static::class]); |
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} |
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return false; |
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} |
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$this->userKey = $username; |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function authenticate(ServerRequestInterface $request, array $credentials): ?TokenInterface |
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{ |
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if (!empty($credentials)) { |
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return null; |
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} |
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$user = $this->userProvider->loadUserByIdentifier($this->userKey); |
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if ($request->hasHeader('AUTH-SWITCH-USER')) { |
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$token = $this->tokenStorage->getToken(); |
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if ($token && $this->userKey !== $token->getUserIdentifier()) { |
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$token = new SwitchUserToken($user, 'main', $user->getRoles(), $token, (string) $request->getUri()); |
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} |
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} |
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return $token ?? new PreAuthenticatedToken($user, 'main', $user->getRoles()); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function failure(ServerRequestInterface $request, AuthenticationException $exception): ?ResponseInterface |
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{ |
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$this->clearToken($this->tokenStorage->getToken(), $exception); |
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return null; |
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} |
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private function clearToken(?TokenInterface $token, AuthenticationException $exception = null): void |
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{ |
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if ($token instanceof PreAuthenticatedToken) { |
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$this->tokenStorage->setToken(); |
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if (null !== $this->logger) { |
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if (null === $exception) { |
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$this->logger->info(\sprintf('Cleared pre-authenticated token, due missing user in credentials: %s, %s', $this->userKey, $this->credentialsKey)); |
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} else { |
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$this->logger->info('Cleared pre-authenticated token due to an exception.', ['exception' => $exception]); |
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} |
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} |
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} |
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} |
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} |
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