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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\SAML2\Response; |
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use Psr\Log\LoggerInterface; |
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use SimpleSAML\SAML2\Assertion\ProcessorBuilder; |
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use SimpleSAML\SAML2\Configuration\Destination; |
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use SimpleSAML\SAML2\Configuration\IdentityProvider; |
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use SimpleSAML\SAML2\Configuration\ServiceProvider; |
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use SimpleSAML\SAML2\Response\Exception\InvalidResponseException; |
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use SimpleSAML\SAML2\Response\Exception\NoAssertionsFoundException; |
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use SimpleSAML\SAML2\Response\Exception\PreconditionNotMetException; |
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use SimpleSAML\SAML2\Response\Exception\UnsignedResponseException; |
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use SimpleSAML\SAML2\Response\Validation\PreconditionValidator; |
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use SimpleSAML\SAML2\Signature\Validator; |
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use SimpleSAML\SAML2\Utilities\ArrayCollection; |
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use SimpleSAML\SAML2\XML\samlp\Response; |
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use function sprintf; |
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class Processor |
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{ |
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/** |
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* @var \SimpleSAML\SAML2\Response\Validation\PreconditionValidator |
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*/ |
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private PreconditionValidator $preconditionValidator; |
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/** |
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* @var \SimpleSAML\SAML2\Signature\Validator |
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*/ |
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private Validator $signatureValidator; |
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/** |
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* @var \SimpleSAML\SAML2\Assertion\Processor |
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*/ |
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private $assertionProcessor; |
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/** |
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* Indicates whether or not the response was signed. This is required in order to be able to check whether either |
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* the reponse or one of its assertions was signed |
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* |
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* @var bool |
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*/ |
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private bool $responseIsSigned = false; |
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/** |
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* @param \Psr\Log\LoggerInterface $logger |
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*/ |
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public function __construct( |
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private LoggerInterface $logger, |
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) { |
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$this->signatureValidator = new Validator($logger); |
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} |
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/** |
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* @param \SimpleSAML\SAML2\Configuration\ServiceProvider $serviceProviderConfiguration |
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* @param \SimpleSAML\SAML2\Configuration\IdentityProvider $identityProviderConfiguration |
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* @param \SimpleSAML\SAML2\Configuration\Destination $currentDestination |
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* @param \SimpleSAML\SAML2\XML\samlp\Response $response |
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* |
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* @return \SimpleSAML\SAML2\Utilities\ArrayCollection Collection of \SimpleSAML\SAML2\XML\saml\Assertion objects |
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*/ |
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public function process( |
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ServiceProvider $serviceProviderConfiguration, |
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IdentityProvider $identityProviderConfiguration, |
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Destination $currentDestination, |
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Response $response, |
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): ArrayCollection { |
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$this->preconditionValidator = new PreconditionValidator($currentDestination); |
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$this->assertionProcessor = ProcessorBuilder::build( |
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$this->logger, |
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$this->signatureValidator, |
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$currentDestination, |
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$identityProviderConfiguration, |
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$serviceProviderConfiguration, |
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$response, |
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); |
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$this->enforcePreconditions($response); |
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$this->verifySignature($response, $identityProviderConfiguration); |
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return $this->processAssertions($response); |
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} |
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/** |
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* Checks the preconditions that must be valid in order for the response to be processed. |
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* |
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* @param \SimpleSAML\SAML2\XML\samlp\Response $response |
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* @throws \SimpleSAML\SAML2\Response\Exception\PreconditionNotMetException |
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*/ |
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private function enforcePreconditions(Response $response): void |
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{ |
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$result = $this->preconditionValidator->validate($response); |
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if (!$result->isValid()) { |
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throw PreconditionNotMetException::createFromValidationResult($result); |
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} |
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} |
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/** |
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* @param \SimpleSAML\SAML2\XML\samlp\Response $response |
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* @param \SimpleSAML\SAML2\Configuration\IdentityProvider $identityProviderConfiguration |
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* @throws \SimpleSAML\SAML2\Response\Exception\InvalidResponseException |
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*/ |
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private function verifySignature(Response $response, IdentityProvider $identityProviderConfiguration): void |
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{ |
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if (!$response->isMessageConstructedWithSignature()) { |
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$this->logger->info(sprintf( |
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'SAMLResponse with id "%s" was not signed at root level, not attempting to verify the signature of the' |
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. ' reponse itself', |
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$response->getId(), |
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)); |
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return; |
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} |
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$this->logger->info(sprintf( |
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'Attempting to verify the signature of SAMLResponse with id "%s"', |
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$response->getId(), |
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)); |
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$this->responseIsSigned = true; |
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if (!$this->signatureValidator->hasValidSignature($response, $identityProviderConfiguration)) { |
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throw new InvalidResponseException( |
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sprintf('The SAMLResponse with id "%s", does not have a valid signature', $response->getId()), |
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); |
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} |
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} |
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/** |
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* @param \SimpleSAML\SAML2\XML\samlp\Response $response |
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* @throws \SimpleSAML\SAML2\Response\Exception\UnsignedResponseException |
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* @throws \SimpleSAML\SAML2\Response\Exception\NoAssertionsFoundException |
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* @return \SimpleSAML\SAML2\Utilities\ArrayCollection |
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*/ |
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private function processAssertions(Response $response): ArrayCollection |
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{ |
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$assertions = $response->getAssertions(); |
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if (empty($assertions)) { |
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throw new NoAssertionsFoundException('No assertions found in response from IdP.'); |
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} |
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$decryptedAssertions = $this->assertionProcessor->decryptAssertions( |
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new ArrayCollection($assertions), |
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); |
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if (!$this->responseIsSigned) { |
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foreach ($assertions as $assertion) { |
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if (!$assertion->wasSignedAtConstruction()) { |
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throw new UnsignedResponseException( |
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'Both the response and the assertion it contains are not signed.', |
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); |
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} |
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} |
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} |
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return $this->assertionProcessor->processAssertions($decryptedAssertions); |
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} |
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} |
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simplesamlphp /
saml2
