/**
* @param \DOMElement $node
* @param DeserializationContext $context
*
* @throws \LightSaml\Error\LightSamlSecurityException
*/
public function deserialize(\DOMElement $node, DeserializationContext $context)
{
$this->checkXmlNodeName($node, 'Signature', SamlConstants::NS_XMLDSIG);
$this->signature = new XMLSecurityDSig();
$this->signature->idKeys[] = $this->getIDName();
$this->signature->sigNode = $node;
$this->signature->canonicalizeSignedInfo();
$this->key = null;
$key = new XMLSecurityKey(XMLSecurityKey::RSA_SHA1, array('type' => 'public'));
XMLSecEnc::staticLocateKeyInfo($key, $node);
if ($key->name || $key->key) {
$this->key = $key;
}
$this->certificates = array();
$list = $context->getXpath()->query('./ds:KeyInfo/ds:X509Data/ds:X509Certificate', $node);
foreach ($list as $certNode) {
$certData = trim($certNode->textContent);
$certData = str_replace(array("\r", "\n", "\t", ' '), '', $certData);
$this->certificates[] = $certData;
}
}
/**
* Try to extract the public key from DOM node.
*
* Sets publicKey and keyAlgorithm properties if success.
*
* @see publicKey
* @see keyAlgorithm
*
* @param DOMNode $dom
*
* @return bool `true` If public key was extracted or `false` if cannot be possible
*/
protected function setPublicKeyFromNode(DOMNode $dom)
{
// try to get the public key from the certificate
$objXMLSecDSig = new XMLSecurityDSig();
$objDSig = $objXMLSecDSig->locateSignature($dom);
if (!$objDSig) {
return false;
}
$objKey = $objXMLSecDSig->locateKey();
if (!$objKey) {
return false;
}
XMLSecEnc::staticLocateKeyInfo($objKey, $objDSig);
$this->publicKey = $objKey->getX509Certificate();
$this->keyAlgorithm = $objKey->getAlgorith();
return true;
}
/**
* Create key from an EncryptedKey-element.
*
* @param DOMElement $element The EncryptedKey-element.
* @throws Exception
*
* @return XMLSecurityKey The new key.
*/
public static function fromEncryptedKeyElement(DOMElement $element)
{
$objenc = new XMLSecEnc();
$objenc->setNode($element);
if (!($objKey = $objenc->locateKey())) {
throw new Exception("Unable to locate algorithm for this Encrypted Key");
}
$objKey->isEncrypted = true;
$objKey->encryptedCtx = $objenc;
XMLSecEnc::staticLocateKeyInfo($objKey, $element);
return $objKey;
}
public function decryptSoapDoc($doc, $options)
{
$privKey = null;
$privKey_isFile = false;
$privKey_isCert = false;
if (is_array($options)) {
$privKey = !empty($options['keys']['private']['key']) ? $options['keys']['private']['key'] : null;
$privKey_isFile = !empty($options['keys']['private']['isFile']) ? true : false;
$privKey_isCert = !empty($options['keys']['private']['isCert']) ? true : false;
}
$objenc = new XMLSecEnc();
$xpath = new DOMXPath($doc);
$envns = $doc->documentElement->namespaceURI;
$xpath->registerNamespace('soapns', $envns);
$xpath->registerNamespace('soapenc', 'http://www.w3.org/2001/04/xmlenc#');
$nodes = $xpath->query('/soapns:Envelope/soapns:Header/*[local-name()="Security"]/soapenc:EncryptedKey');
$references = array();
if ($node = $nodes->item(0)) {
$objenc = new XMLSecEnc();
$objenc->setNode($node);
if (!($objKey = $objenc->locateKey())) {
throw new Exception('Unable to locate algorithm for this Encrypted Key');
}
$objKey->isEncrypted = true;
$objKey->encryptedCtx = $objenc;
XMLSecEnc::staticLocateKeyInfo($objKey, $node);
if ($objKey && $objKey->isEncrypted) {
$objencKey = $objKey->encryptedCtx;
$objKey->loadKey($privKey, $privKey_isFile, $privKey_isCert);
$key = $objencKey->decryptKey($objKey);
$objKey->loadKey($key);
}
$refnodes = $xpath->query('./soapenc:ReferenceList/soapenc:DataReference/@URI', $node);
foreach ($refnodes as $reference) {
$references[] = $reference->nodeValue;
}
}
foreach ($references as $reference) {
$arUrl = parse_url($reference);
$reference = $arUrl['fragment'];
$query = '//*[@Id="' . $reference . '"]';
$nodes = $xpath->query($query);
$encData = $nodes->item(0);
if ($algo = $xpath->evaluate('string(./soapenc:EncryptionMethod/@Algorithm)', $encData)) {
$objKey = new XMLSecurityKey($algo);
$objKey->loadKey($key);
}
$objenc->setNode($encData);
$objenc->type = $encData->getAttribute('Type');
$decrypt = $objenc->decryptNode($objKey, true);
}
return true;
}
/**
* Validate the receipt contained in the given XML element using the
* certificate provided.
*
* @param DOMDocument $dom
* @param resource $certificate
* @return bool
*/
protected function validateXml(DOMDocument $dom, $certificate)
{
$secDsig = new XMLSecurityDSig();
// Locate the signature in the receipt XML.
$dsig = $secDsig->locateSignature($dom);
if ($dsig === null) {
throw new RunTimeException('Cannot locate receipt signature');
}
$secDsig->canonicalizeSignedInfo();
$secDsig->idKeys = array('wsu:Id');
$secDsig->idNS = array('wsu' => 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
if (!$secDsig->validateReference()) {
throw new RunTimeException('Reference validation failed');
}
$key = $secDsig->locateKey();
if ($key === null) {
throw new RunTimeException('Could not locate key in receipt');
}
$keyInfo = XMLSecEnc::staticLocateKeyInfo($key, $dsig);
if (!$keyInfo->key) {
$key->loadKey($certificate);
}
return $secDsig->verify($key) == 1;
}
public function processSignature($refNode)
{
$objXMLSecDSig = new XMLSecurityDSig();
$objXMLSecDSig->idKeys[] = 'wswsu:Id';
$objXMLSecDSig->idNS['wswsu'] = self::WSUNS;
$objXMLSecDSig->sigNode = $refNode;
/* Canonicalize the signed info */
$objXMLSecDSig->canonicalizeSignedInfo();
$retVal = $objXMLSecDSig->validateReference();
if (!$retVal) {
throw new Exception('Validation Failed');
}
$key = null;
$objKey = $objXMLSecDSig->locateKey();
if ($objKey) {
if ($objKeyInfo = XMLSecEnc::staticLocateKeyInfo($objKey, $refNode)) {
/* Handle any additional key processing such as encrypted keys here */
}
}
if (empty($objKey)) {
throw new Exception('Error loading key to handle Signature');
}
do {
if (empty($objKey->key)) {
$this->SOAPXPath->registerNamespace('xmlsecdsig', XMLSecurityDSig::XMLDSIGNS);
$query = './xmlsecdsig:KeyInfo/wswsse:SecurityTokenReference/wswsse:Reference';
$nodeset = $this->SOAPXPath->query($query, $refNode);
if ($encmeth = $nodeset->item(0)) {
if ($uri = $encmeth->getAttribute('URI')) {
$arUrl = parse_url($uri);
if (empty($arUrl['path']) && ($identifier = $arUrl['fragment'])) {
$query = '//wswsse:BinarySecurityToken[@wswsu:Id="' . $identifier . '"]';
$nodeset = $this->SOAPXPath->query($query);
if ($encmeth = $nodeset->item(0)) {
$x509cert = $encmeth->textContent;
$x509cert = str_replace(array("\r", "\n"), '', $x509cert);
$x509cert = "-----BEGIN CERTIFICATE-----\n" . chunk_split($x509cert, 64, "\n") . "-----END CERTIFICATE-----\n";
$objKey->loadKey($x509cert);
break;
}
}
}
}
throw new Exception('Error loading key to handle Signature');
}
} while (0);
if (!$objXMLSecDSig->verify($objKey)) {
throw new Exception('Unable to validate Signature');
}
return true;
}
