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<?php |
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/** |
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* @author Boris Guéry <[email protected]> |
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*/ |
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namespace Bgy\OAuth2; |
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use Bgy\OAuth2\GrantType\GrantDecision; |
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use Bgy\OAuth2\GrantType\GrantError; |
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use Bgy\OAuth2\GrantType\GrantType; |
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class AuthorizationServer |
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{ |
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private $configuration; |
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private $clientAuthenticator; |
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public function __construct(AuthorizationServerConfiguration $configuration) |
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{ |
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$this->configuration = $configuration; |
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$this->clientAuthenticator = new ClientAuthenticator( |
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$this->configuration->getClientStorage() |
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); |
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} |
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/** |
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* @param TokenRequestAttempt $tokenRequestAttempt |
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* @return FailedTokenRequestAttemptResult|SuccessfulTokenRequestAttemptResult |
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*/ |
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public function requestAccessToken(TokenRequestAttempt $tokenRequestAttempt) |
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{ |
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if (!$this->checkGrantType($tokenRequestAttempt)) { |
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return new FailedTokenRequestAttemptResult(GrantDecision::denied(GrantError::invalidGrant('Unknown grant type'))); |
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} |
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if ($this->checkIfAClientIsAlwaysRequired()) { |
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if (!$this->checkIfAClientIsProvided($tokenRequestAttempt)) { |
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return new FailedTokenRequestAttemptResult(GrantDecision::denied(GrantError::invalidGrant('Missing client_id'))); |
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} |
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if (!$this->checkIfTheProvidedClientIsValid($tokenRequestAttempt)) { |
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return new FailedTokenRequestAttemptResult(GrantDecision::denied(GrantError::accessDenied('Invalid client credentials'))); |
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} |
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if (!$this->checkIfClientSupportsRequestedGrantType($tokenRequestAttempt)) { |
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return new FailedTokenRequestAttemptResult( |
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GrantDecision::denied( |
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GrantError::invalidGrant( |
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sprintf( |
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'This client doesn\'t support the following grant type: "%s"', |
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$tokenRequestAttempt->getGrantType() |
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) |
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) |
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) |
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); |
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} |
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} |
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$grantDecision = $this->getGrantTypeByIdentifier($tokenRequestAttempt->getGrantType()) |
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->grant($tokenRequestAttempt) |
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; |
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if ($grantDecision->equals(GrantDecision::allowed())) { |
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$accessToken = $this->buildAccessToken($tokenRequestAttempt, $grantDecision); |
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$refreshToken = $this->buildRefreshToken($accessToken); |
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return new SuccessfulTokenRequestAttemptResult($grantDecision, $accessToken, $refreshToken); |
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} |
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return new FailedTokenRequestAttemptResult($grantDecision); |
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} |
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private function checkGrantType(TokenRequestAttempt $tokenRequestAttempt) |
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{ |
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return (null !== $this->getGrantTypeByIdentifier($tokenRequestAttempt->getGrantType())); |
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} |
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private function checkIfAClientIsAlwaysRequired() |
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{ |
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return $this->configuration->alwaysRequireAClient(); |
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} |
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private function checkIfAClientIsProvided(TokenRequestAttempt $tokenRequestAttempt) |
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{ |
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return (false === $tokenRequestAttempt->getInputData()->getClientId()); |
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} |
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private function checkIfTheProvidedClientIsValid(TokenRequestAttempt $tokenRequestAttempt) |
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{ |
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return $this->clientAuthenticator->isClientValid( |
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$tokenRequestAttempt->getInputData()->getClientId(), |
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$tokenRequestAttempt->getInputData()->getClientSecret() |
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); |
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} |
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private function checkIfClientSupportsRequestedGrantType(TokenRequestAttempt $tokenRequestAttempt) |
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{ |
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$client = $this->configuration->getClientStorage() |
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->findById($tokenRequestAttempt->getInputData()->getClientId()) |
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; |
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return in_array($tokenRequestAttempt->getGrantType(), $client->getAllowedGrantTypes()); |
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} |
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private function buildAccessToken(TokenRequestAttempt $tokenRequestAttempt, GrantDecision $grantDecision) |
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{ |
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if ($grantDecision->isDenied()) { |
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throw new \LogicException('Unable to build an access token with a denied decision'); |
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} |
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$token = $this->configuration->getTokenGenerator()->generate( |
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['length' => $this->configuration->getAccessTokenLength()] |
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) |
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; |
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$expiresAt = new \DateTime('now', new \DateTimeZone('UTC')); |
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$expiresAt->add( |
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\DateInterval::createFromDateString( |
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sprintf( |
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"%d seconds", |
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$this->configuration->getAccessTokenTTL() |
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) |
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) |
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); |
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$accessToken = new AccessToken( |
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$token, |
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\DateTimeImmutable::createFromMutable($expiresAt), |
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$tokenRequestAttempt->getInputData()->getClientId(), |
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$grantDecision->getResourceOwner(), |
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[] |
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); |
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$this->configuration->getAccessTokenStorage()->save($accessToken); |
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return $accessToken; |
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} |
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private function buildRefreshToken(AccessToken $accessToken) |
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{ |
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$refreshToken = null; |
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if ($this->configuration->alwaysGenerateARefreshToken()) { |
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$token = $this->configuration->getTokenGenerator()->generate( |
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['length' => $this->configuration->getAccessTokenLength()] |
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) |
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; |
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$expiresAt = new \DateTime('now', new \DateTimeZone('UTC')); |
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$expiresAt->add( |
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\DateInterval::createFromDateString( |
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sprintf( |
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"%d seconds", |
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$this->configuration->getRefreshTokenTTL() |
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) |
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) |
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); |
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$refreshToken = new RefreshToken( |
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$token, |
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$accessToken, |
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\DateTimeImmutable::createFromMutable($expiresAt) |
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); |
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$this->configuration->getRefreshTokenStorage()->save($refreshToken); |
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} |
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return $refreshToken; |
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} |
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/** |
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* @param $identifier |
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* @return GrantType |
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*/ |
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private function getGrantTypeByIdentifier($identifier) |
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{ |
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foreach ($this->configuration->getGrantTypeExtensions() as $grantTypeExtension) { |
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if (strtolower($identifier) === strtolower($grantTypeExtension->getIdentifier())) { |
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return $grantTypeExtension; |
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} |
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} |
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return null; |
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} |
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} |
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borisguery /
oauth2-server
