public function verify(XMLSecurityKey $objKey)
{
$doc = $this->sigNode->ownerDocument;
$xpath = new DOMXPath($doc);
$xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
$query = "string(./secdsig:SignatureValue)";
$sigValue = $xpath->evaluate($query, $this->sigNode);
if (empty($sigValue)) {
throw new Exception("Unable to locate SignatureValue");
}
return $objKey->verifySignature($this->signedInfo, base64_decode($sigValue));
}
