/** * Encrypt the selected node with the given key. * * @param XMLSecurityKey $objKey The encryption key and algorithm. * @param bool $replace Whether the encrypted node should be replaced in the original tree. Default is TRUE. * @throws Exception * @return DOMElement The <xenc:EncryptedData>-element. */ public function encryptNode($objKey, $replace = TRUE) { $data = ''; if (empty($this->rawNode)) { throw new Exception('Node to encrypt has not been set'); } if (!$objKey instanceof XMLSecurityKey) { throw new Exception('Invalid Key'); } $doc = $this->rawNode->ownerDocument; $xPath = new DOMXPath($this->encdoc); $objList = $xPath->query('/xenc:EncryptedData/xenc:CipherData/xenc:CipherValue'); $cipherValue = $objList->item(0); if ($cipherValue == NULL) { throw new Exception('Error locating CipherValue element within template'); } switch ($this->type) { case DBSeller_Helper_Xml_Security_XMLSecEnc::Element: $data = $doc->saveXML($this->rawNode); $this->encdoc->documentElement->setAttribute('Type', DBSeller_Helper_Xml_Security_XMLSecEnc::Element); break; case DBSeller_Helper_Xml_Security_XMLSecEnc::Content: $children = $this->rawNode->childNodes; foreach ($children as $child) { $data .= $doc->saveXML($child); } $this->encdoc->documentElement->setAttribute('Type', DBSeller_Helper_Xml_Security_XMLSecEnc::Content); break; default: throw new Exception('Type is currently not supported'); return; } $encMethod = $this->encdoc->documentElement->appendChild($this->encdoc->createElementNS(DBSeller_Helper_Xml_Security_XMLSecEnc::XMLENCNS, 'xenc:EncryptionMethod')); $encMethod->setAttribute('Algorithm', $objKey->getAlgorith()); $cipherValue->parentNode->parentNode->insertBefore($encMethod, $cipherValue->parentNode->parentNode->firstChild); $strEncrypt = base64_encode($objKey->encryptData($data)); $value = $this->encdoc->createTextNode($strEncrypt); $cipherValue->appendChild($value); if ($replace) { switch ($this->type) { case DBSeller_Helper_Xml_Security_XMLSecEnc::Element: if ($this->rawNode->nodeType == XML_DOCUMENT_NODE) { return $this->encdoc; } $importEnc = $this->rawNode->ownerDocument->importNode($this->encdoc->documentElement, TRUE); $this->rawNode->parentNode->replaceChild($importEnc, $this->rawNode); return $importEnc; break; case DBSeller_Helper_Xml_Security_XMLSecEnc::Content: $importEnc = $this->rawNode->ownerDocument->importNode($this->encdoc->documentElement, TRUE); while ($this->rawNode->firstChild) { $this->rawNode->removeChild($this->rawNode->firstChild); } $this->rawNode->appendChild($importEnc); return $importEnc; break; } } else { return $this->encdoc->documentElement; } }