<?php 
 
/* 
 * This file is part of the Symfony package. 
 * 
 * (c) Fabien Potencier <fabien@symfony.com> 
 * 
 * For the full copyright and license information, please view the LICENSE 
 * file that was distributed with this source code. 
 */ 
 
namespace Symfony\Component\Security\Guard\Provider; 
 
use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface; 
use Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface; 
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface; 
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface; 
use Symfony\Component\Security\Core\Exception\AuthenticationException; 
use Symfony\Component\Security\Core\Exception\AuthenticationExpiredException; 
use Symfony\Component\Security\Core\Exception\BadCredentialsException; 
use Symfony\Component\Security\Core\Exception\UserNotFoundException; 
use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface; 
use Symfony\Component\Security\Core\User\PasswordUpgraderInterface; 
use Symfony\Component\Security\Core\User\UserCheckerInterface; 
use Symfony\Component\Security\Core\User\UserInterface; 
use Symfony\Component\Security\Core\User\UserProviderInterface; 
use Symfony\Component\Security\Guard\AuthenticatorInterface; 
use Symfony\Component\Security\Guard\PasswordAuthenticatedInterface; 
use Symfony\Component\Security\Guard\Token\GuardTokenInterface; 
use Symfony\Component\Security\Guard\Token\PreAuthenticationGuardToken; 
 
trigger_deprecation('symfony/security-guard', '5.3', 'The "%s" class is deprecated, use the new authenticator system instead.', GuardAuthenticationProvider::class); 
 
/** 
 * Responsible for accepting the PreAuthenticationGuardToken and calling 
 * the correct authenticator to retrieve the authenticated token. 
 * 
 * @author Ryan Weaver <ryan@knpuniversity.com> 
 * 
 * @deprecated since Symfony 5.3, use the new authenticator system instead 
 */ 
class GuardAuthenticationProvider implements AuthenticationProviderInterface 
{ 
    private $guardAuthenticators; 
    private $userProvider; 
    private $providerKey; 
    private $userChecker; 
    private $passwordHasher; 
 
    /** 
     * @param iterable<array-key, AuthenticatorInterface> $guardAuthenticators The authenticators, with keys that match what's passed to GuardAuthenticationListener 
     * @param string                                      $providerKey         The provider (i.e. firewall) key 
     * @param UserPasswordHasherInterface                 $passwordHasher 
     */ 
    public function __construct(iterable $guardAuthenticators, UserProviderInterface $userProvider, string $providerKey, UserCheckerInterface $userChecker, $passwordHasher = null) 
    { 
        $this->guardAuthenticators = $guardAuthenticators; 
        $this->userProvider = $userProvider; 
        $this->providerKey = $providerKey; 
        $this->userChecker = $userChecker; 
        $this->passwordHasher = $passwordHasher; 
 
        if ($passwordHasher instanceof UserPasswordEncoderInterface) { 
            trigger_deprecation('symfony/security-core', '5.3', sprintf('Passing a "%s" instance to the "%s" constructor is deprecated, use "%s" instead.', UserPasswordEncoderInterface::class, __CLASS__, UserPasswordHasherInterface::class)); 
        } 
    } 
 
    /** 
     * Finds the correct authenticator for the token and calls it. 
     * 
     * @param GuardTokenInterface $token 
     * 
     * @return TokenInterface 
     */ 
    public function authenticate(TokenInterface $token) 
    { 
        if (!$token instanceof GuardTokenInterface) { 
            throw new \InvalidArgumentException('GuardAuthenticationProvider only supports GuardTokenInterface.'); 
        } 
 
        if (!$token instanceof PreAuthenticationGuardToken) { 
            /* 
             * The listener *only* passes PreAuthenticationGuardToken instances. 
             * This means that an authenticated token (e.g. PostAuthenticationGuardToken) 
             * is being passed here, which happens if that token becomes 
             * "not authenticated" (e.g. happens if the user changes between 
             * requests). In this case, the user should be logged out, so 
             * we will return an AnonymousToken to accomplish that. 
             */ 
 
            // this should never happen - but technically, the token is 
            // authenticated... so it could just be returned 
            if ($token->isAuthenticated(false)) { 
                return $token; 
            } 
 
            // this causes the user to be logged out 
            throw new AuthenticationExpiredException(); 
        } 
 
        $guardAuthenticator = $this->findOriginatingAuthenticator($token); 
 
        if (null === $guardAuthenticator) { 
            throw new AuthenticationException(sprintf('Token with provider key "%s" did not originate from any of the guard authenticators of provider "%s".', $token->getGuardProviderKey(), $this->providerKey)); 
        } 
 
        return $this->authenticateViaGuard($guardAuthenticator, $token); 
    } 
 
    private function authenticateViaGuard(AuthenticatorInterface $guardAuthenticator, PreAuthenticationGuardToken $token): GuardTokenInterface 
    { 
        // get the user from the GuardAuthenticator 
        $user = $guardAuthenticator->getUser($token->getCredentials(), $this->userProvider); 
 
        if (null === $user) { 
            $e = new UserNotFoundException(sprintf('Null returned from "%s::getUser()".', get_debug_type($guardAuthenticator))); 
            // @deprecated since Symfony 5.3, change to $token->getUserIdentifier() in 6.0 
            $e->setUserIdentifier(method_exists($token, 'getUserIdentifier') ? $token->getUserIdentifier() : $token->getUsername()); 
 
            throw $e; 
        } 
 
        if (!$user instanceof UserInterface) { 
            throw new \UnexpectedValueException(sprintf('The "%s::getUser()" method must return a UserInterface. You returned "%s".', get_debug_type($guardAuthenticator), get_debug_type($user))); 
        } 
 
        if ($guardAuthenticator instanceof PasswordAuthenticatedInterface && !$user instanceof PasswordAuthenticatedUserInterface) { 
            trigger_deprecation('symfony/security-guard', '5.3', 'Not implementing the "%s" interface in class "%s" while using password-based guard authenticators is deprecated.', PasswordAuthenticatedUserInterface::class, get_debug_type($user)); 
        } 
 
        $this->userChecker->checkPreAuth($user); 
        if (true !== $checkCredentialsResult = $guardAuthenticator->checkCredentials($token->getCredentials(), $user)) { 
            if (false !== $checkCredentialsResult) { 
                throw new \TypeError(sprintf('"%s::checkCredentials()" must return a boolean value.', get_debug_type($guardAuthenticator))); 
            } 
 
            throw new BadCredentialsException(sprintf('Authentication failed because "%s::checkCredentials()" did not return true.', get_debug_type($guardAuthenticator))); 
        } 
        if ($this->userProvider instanceof PasswordUpgraderInterface && $guardAuthenticator instanceof PasswordAuthenticatedInterface && null !== $this->passwordHasher && (null !== $password = $guardAuthenticator->getPassword($token->getCredentials())) && $this->passwordHasher->needsRehash($user)) { 
            if ($this->passwordHasher instanceof UserPasswordEncoderInterface) { 
                // @deprecated since Symfony 5.3 
                $this->userProvider->upgradePassword($user, $this->passwordHasher->encodePassword($user, $password)); 
            } else { 
                $this->userProvider->upgradePassword($user, $this->passwordHasher->hashPassword($user, $password)); 
            } 
        } 
        $this->userChecker->checkPostAuth($user); 
 
        // turn the UserInterface into a TokenInterface 
        $authenticatedToken = $guardAuthenticator->createAuthenticatedToken($user, $this->providerKey); 
        if (!$authenticatedToken instanceof TokenInterface) { 
            throw new \UnexpectedValueException(sprintf('The "%s::createAuthenticatedToken()" method must return a TokenInterface. You returned "%s".', get_debug_type($guardAuthenticator), get_debug_type($authenticatedToken))); 
        } 
 
        return $authenticatedToken; 
    } 
 
    private function findOriginatingAuthenticator(PreAuthenticationGuardToken $token): ?AuthenticatorInterface 
    { 
        // find the *one* GuardAuthenticator that this token originated from 
        foreach ($this->guardAuthenticators as $key => $guardAuthenticator) { 
            // get a key that's unique to *this* guard authenticator 
            // this MUST be the same as GuardAuthenticationListener 
            $uniqueGuardKey = $this->providerKey.'_'.$key; 
 
            if ($uniqueGuardKey === $token->getGuardProviderKey()) { 
                return $guardAuthenticator; 
            } 
        } 
 
        // no matching authenticator found - but there will be multiple GuardAuthenticationProvider 
        // instances that will be checked if you have multiple firewalls. 
 
        return null; 
    } 
 
    public function supports(TokenInterface $token) 
    { 
        if ($token instanceof PreAuthenticationGuardToken) { 
            return null !== $this->findOriginatingAuthenticator($token); 
        } 
 
        return $token instanceof GuardTokenInterface; 
    } 
}