/**
* @param XMLSecurityKey $key
*
* @return bool
*
* @throws LightSamlSecurityException
*/
public function validate(XMLSecurityKey $key)
{
if (null == $this->signature) {
return false;
}
if (false == $this->signature->validateReference()) {
throw new LightSamlSecurityException('Digest validation failed');
}
$key = $this->castKeyIfNecessary($key);
if (false == $this->signature->verify($key)) {
throw new LightSamlSecurityException('Unable to verify Signature');
}
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 verify(DOMDocument $data)
{
$objKey = null;
$objXMLSecDSig = new XMLSecurityDSig();
$objDSig = $objXMLSecDSig->locateSignature($data);
if (!$objDSig) {
throw new UnexpectedValueException('Signature DOM element not found.');
}
$objXMLSecDSig->canonicalizeSignedInfo();
if (!$this->getPublicKey()) {
// try to get the public key from the certificate
$objKey = $objXMLSecDSig->locateKey();
if (!$objKey) {
throw new RuntimeException('There is no set either private key or public key for signature verification.');
}
XMLSecEnc::staticLocateKeyInfo($objKey, $objDSig);
$this->publicKey = $objKey->getX509Certificate();
$this->keyAlgorithm = $objKey->getAlgorith();
}
if (!$objKey) {
$objKey = new XMLSecurityKey($this->keyAlgorithm, ['type' => 'public']);
$objKey->loadKey($this->getPublicKey());
}
// Check signature
if (1 !== $objXMLSecDSig->verify($objKey)) {
return false;
}
// Check references (data)
try {
$objXMLSecDSig->validateReference();
} catch (\Exception $e) {
return false;
}
return true;
}
public function processSignature($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;
}
