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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\XMLSecurity\Test\XML; |
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use DOMElement; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\XML\AbstractElement; |
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use SimpleSAML\XML\Exception\InvalidDOMElementException; |
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use SimpleSAML\XML\Exception\TooManyElementsException; |
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use SimpleSAML\XMLSecurity\Backend\EncryptionBackend; |
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use SimpleSAML\XMLSecurity\XML\ds\Signature; |
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use SimpleSAML\XMLSecurity\XML\EncryptableElementInterface; |
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use SimpleSAML\XMLSecurity\XML\EncryptableElementTrait; |
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use SimpleSAML\XMLSecurity\XML\SignableElementInterface; |
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use SimpleSAML\XMLSecurity\XML\SignableElementTrait; |
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use SimpleSAML\XMLSecurity\XML\SignedElementInterface; |
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use SimpleSAML\XMLSecurity\XML\SignedElementTrait; |
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/** |
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* This is an example class demonstrating an object that can be signed and encrypted. |
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* |
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* @package simplesamlphp/xml-security |
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*/ |
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class CustomSignable extends AbstractElement implements |
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SignableElementInterface, |
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SignedElementInterface, |
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EncryptableElementInterface |
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{ |
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use SignableElementTrait; |
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use SignedElementTrait; |
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use EncryptableElementTrait; |
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/** @var string */ |
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public const NS = 'urn:x-simplesamlphp:namespace'; |
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/** @var string */ |
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public const NS_PREFIX = 'ssp'; |
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/** @var bool */ |
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protected bool $formatOutput = false; |
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/** @var \SimpleSAML\XMLSecurity\XML\ds\Signature|null */ |
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protected ?Signature $signature = null; |
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/** @var \SimpleSAML\XMLSecurity\Backend\EncryptionBackend|null */ |
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private ?EncryptionBackend $backend = null; |
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/** @var string[] */ |
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private array $blacklistedAlgs = []; |
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/** |
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* Constructor |
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* |
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* @param \DOMElement $xml |
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*/ |
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public function __construct( |
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protected DOMElement $xml, |
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protected ?string $id |
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) { |
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} |
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/** |
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* Get the namespace for the element. |
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* |
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* @return string |
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*/ |
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public static function getNamespaceURI(): string |
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{ |
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return static::NS; |
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} |
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/** |
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* Get the namespace-prefix for the element. |
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* |
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* @return string |
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*/ |
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public static function getNamespacePrefix(): string |
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{ |
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return static::NS_PREFIX; |
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} |
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/** |
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* Get the XML element. |
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* |
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* @return \DOMElement |
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*/ |
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public function getXML(): DOMElement |
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{ |
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return $this->xml; |
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} |
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/** |
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* @return string|null |
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*/ |
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public function getId(): ?string |
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{ |
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return $this->id; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function getOriginalXML(): DOMElement |
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{ |
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return $this->xml; |
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} |
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/** |
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* Implement a method like this if your encrypted object needs to instantiate a new decryptor, for example, to |
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* decrypt a session key. This method is required by \SimpleSAML\XMLSecurity\XML\EncryptedElementTrait. |
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* |
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* @return \SimpleSAML\XMLSecurity\Backend\EncryptionBackend|null The encryption backend to use, or null if we want |
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* to use the default. |
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*/ |
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public function getEncryptionBackend(): ?EncryptionBackend |
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{ |
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return $this->backend; |
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} |
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/** |
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* Implement a method like this if your encrypted object needs to instantiate a new decryptor, for example, to |
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* decrypt a session key. This method is required by \SimpleSAML\XMLSecurity\XML\EncryptedElementTrait. |
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* |
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* @param \SimpleSAML\XMLSecurity\Backend\EncryptionBackend|null $backend The encryption backend we want to use, or |
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* null if we want to use the defaults. |
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*/ |
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public function setEncryptionBackend(?EncryptionBackend $backend): void |
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{ |
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$this->backend = $backend; |
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} |
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/** |
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* Implement a method like this if your encrypted object needs to instantiate a new decryptor, for example, to |
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* decrypt a session key. This method is required by \SimpleSAML\XMLSecurity\XML\EncryptedElementTrait. |
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* |
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* @return string[]|null An array with all algorithm identifiers that we want to blacklist, or null if we want to |
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* use the defaults. |
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*/ |
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public function getBlacklistedAlgorithms(): ?array |
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{ |
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return $this->blacklistedAlgs; |
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} |
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/** |
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* Implement a method like this if your encrypted object needs to instantiate a new decryptor, for example, to |
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* decrypt a session key. This method is required by \SimpleSAML\XMLSecurity\XML\EncryptedElementTrait. |
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* |
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* @param string[]|null $algIds An array with the identifiers of the algorithms we want to blacklist, or null if we |
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* want to use the defaults. |
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*/ |
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public function setBlacklistedAlgorithms(?array $algIds): void |
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{ |
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$this->blacklistedAlgs = $algIds; |
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} |
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/** |
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* Convert XML into a CustomSignable |
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* |
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* @param \DOMElement $xml The XML element we should load |
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* @return static |
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* |
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* @throws \SimpleSAML\XML\Exception\InvalidDOMElementException |
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* if the qualified name of the supplied element is wrong |
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*/ |
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public static function fromXML(DOMElement $xml): static |
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{ |
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Assert::same($xml->localName, 'CustomSignable', InvalidDOMElementException::class); |
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Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class); |
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$id = self::getOptionalAttribute($xml, 'id', null); |
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$signature = Signature::getChildrenOfClass($xml); |
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Assert::maxCount($signature, 1, TooManyElementsException::class); |
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$customSignable = new static($xml, $id); |
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if (!empty($signature)) { |
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$customSignable->signature = $signature[0]; |
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} |
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return $customSignable; |
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} |
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/** |
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* Convert this CustomSignable to XML. |
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* |
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* @param \DOMElement|null $parent The parent element to append this CustomSignable to. |
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* @return \DOMElement The XML element after adding the data corresponding to this CustomSignable. |
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* @throws \Exception |
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*/ |
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public function toXML(DOMElement $parent = null): DOMElement |
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{ |
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if ($this->signer !== null) { |
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$signedXML = $this->doSign($this->xml); |
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$signedXML->insertBefore($this->signature->toXML($signedXML), $signedXML->firstChild); |
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return $signedXML; |
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} |
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return $this->xml; |
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} |
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} |
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