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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\XMLSecurity\XML\ds; |
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use DOMElement; |
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use SimpleSAML\XML\Exception\InvalidDOMElementException; |
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use SimpleSAML\XML\Exception\MissingElementException; |
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use SimpleSAML\XML\Exception\TooManyElementsException; |
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use SimpleSAML\XML\SchemaValidatableElementInterface; |
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use SimpleSAML\XML\SchemaValidatableElementTrait; |
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use SimpleSAML\XMLSecurity\Assert\Assert; |
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use SimpleSAML\XMLSecurity\Constants as C; |
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use function array_pop; |
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/** |
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* Class representing a ds:Signature element. |
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* |
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* @package simplesamlphp/xml-security |
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*/ |
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final class Signature extends AbstractDsElement implements SchemaValidatableElementInterface |
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{ |
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use SchemaValidatableElementTrait; |
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/** |
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* Signature constructor. |
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* |
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* @param \SimpleSAML\XMLSecurity\XML\ds\SignedInfo $signedInfo |
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* @param \SimpleSAML\XMLSecurity\XML\ds\SignatureValue $signatureValue |
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* @param \SimpleSAML\XMLSecurity\XML\ds\KeyInfo|null $keyInfo |
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* @param \SimpleSAML\XMLSecurity\XML\ds\DsObject[] $objects |
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* @param string|null $Id |
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*/ |
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public function __construct( |
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protected SignedInfo $signedInfo, |
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protected SignatureValue $signatureValue, |
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protected ?KeyInfo $keyInfo, |
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protected array $objects = [], |
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protected ?string $Id = null, |
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) { |
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Assert::maxCount($objects, C::UNBOUNDED_LIMIT); |
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Assert::allIsInstanceOf($objects, DsObject::class); |
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Assert::nullOrValidNCName($Id); |
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} |
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/** |
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* Get the Id used for this signature. |
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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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* @return \SimpleSAML\XMLSecurity\XML\ds\SignedInfo |
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*/ |
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public function getSignedInfo(): SignedInfo |
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{ |
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return $this->signedInfo; |
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} |
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/** |
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* @return \SimpleSAML\XMLSecurity\XML\ds\SignatureValue |
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*/ |
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public function getSignatureValue(): SignatureValue |
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{ |
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return $this->signatureValue; |
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} |
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/** |
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* @return \SimpleSAML\XMLSecurity\XML\ds\KeyInfo|null |
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*/ |
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public function getKeyInfo(): ?KeyInfo |
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{ |
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return $this->keyInfo; |
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} |
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/** |
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* Get the array of ds:Object elements attached to this signature. |
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* |
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* @return \SimpleSAML\XMLSecurity\XML\ds\DsObject[] |
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*/ |
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public function getObjects(): array |
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{ |
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return $this->objects; |
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} |
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/** |
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* Convert XML into a Signature element |
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* |
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* @param \DOMElement $xml |
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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, 'Signature', InvalidDOMElementException::class); |
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Assert::same($xml->namespaceURI, Signature::NS, InvalidDOMElementException::class); |
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$Id = self::getOptionalAttribute($xml, 'Id', null); |
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$signedInfo = SignedInfo::getChildrenOfClass($xml); |
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Assert::minCount( |
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$signedInfo, |
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1, |
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'ds:Signature needs exactly one ds:SignedInfo element.', |
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MissingElementException::class, |
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); |
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Assert::maxCount( |
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$signedInfo, |
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1, |
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'ds:Signature needs exactly one ds:SignedInfo element.', |
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TooManyElementsException::class, |
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); |
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$signatureValue = SignatureValue::getChildrenOfClass($xml); |
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Assert::minCount( |
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$signatureValue, |
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1, |
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'ds:Signature needs exactly one ds:SignatureValue element.', |
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MissingElementException::class, |
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); |
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Assert::maxCount( |
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$signatureValue, |
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1, |
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'ds:Signature needs exactly one ds:SignatureValue element.', |
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TooManyElementsException::class, |
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); |
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$keyInfo = KeyInfo::getChildrenOfClass($xml); |
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Assert::maxCount( |
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$keyInfo, |
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1, |
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'ds:Signature can hold a maximum of one ds:KeyInfo element.', |
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TooManyElementsException::class, |
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); |
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$objects = DsObject::getChildrenOfClass($xml); |
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return new static( |
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array_pop($signedInfo), |
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array_pop($signatureValue), |
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empty($keyInfo) ? null : array_pop($keyInfo), |
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$objects, |
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$Id, |
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); |
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} |
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/** |
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* Convert this Signature element to XML. |
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* |
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* @param \DOMElement|null $parent The element we should append this Signature element to. |
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* @return \DOMElement |
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*/ |
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public function toXML(?DOMElement $parent = null): DOMElement |
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{ |
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$e = $this->instantiateParentElement($parent); |
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if ($this->getId() !== null) { |
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$e->setAttribute('Id', $this->getId()); |
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} |
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$this->getSignedInfo()->toXML($e); |
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$this->getSignatureValue()->toXML($e); |
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$this->getKeyInfo()?->toXML($e); |
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foreach ($this->getObjects() as $o) { |
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$o->toXML($e); |
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} |
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return $e; |
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} |
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} |
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