public function XMLSecurityDSig::processTransforms in SAML SP 2.0 Single Sign On (SSO) - SAML Service Provider 7

Parameters

$refNode:

DOMNode $objData:

bool $includeCommentNodes:

Return value

string

2 calls to XMLSecurityDSig::processTransforms()

XMLSecurityDSig::addRefInternal in includes/XMLSecurityKey.php

XMLSecurityDSig::processRefNode in includes/XMLSecurityKey.php

File

includes/XMLSecurityKey.php, line 1088

Class

XMLSecurityDSig

Code

public function processTransforms($refNode, $objData, $includeCommentNodes = true) {
  $data = $objData;
  $xpath = new DOMXPath($refNode->ownerDocument);
  $xpath
    ->registerNamespace('secdsig', self::XMLDSIGNS);
  $query = './secdsig:Transforms/secdsig:Transform';
  $nodelist = $xpath
    ->query($query, $refNode);
  $canonicalMethod = 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315';
  $arXPath = null;
  $prefixList = null;
  foreach ($nodelist as $transform) {
    $algorithm = $transform
      ->getAttribute("Algorithm");
    switch ($algorithm) {
      case 'http://www.w3.org/2001/10/xml-exc-c14n#':
      case 'http://www.w3.org/2001/10/xml-exc-c14n#WithComments':
        if (!$includeCommentNodes) {

          /* We remove comment nodes by forcing it to use a canonicalization
           * without comments.
           */
          $canonicalMethod = 'http://www.w3.org/2001/10/xml-exc-c14n#';
        }
        else {
          $canonicalMethod = $algorithm;
        }
        $node = $transform->firstChild;
        while ($node) {
          if ($node->localName == 'InclusiveNamespaces') {
            if ($pfx = $node
              ->getAttribute('PrefixList')) {
              $arpfx = array();
              $pfxlist = explode(" ", $pfx);
              foreach ($pfxlist as $pfx) {
                $val = trim($pfx);
                if (!empty($val)) {
                  $arpfx[] = $val;
                }
              }
              if (count($arpfx) > 0) {
                $prefixList = $arpfx;
              }
            }
            break;
          }
          $node = $node->nextSibling;
        }
        break;
      case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315':
      case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments':
        if (!$includeCommentNodes) {

          /* We remove comment nodes by forcing it to use a canonicalization
           * without comments.
           */
          $canonicalMethod = 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315';
        }
        else {
          $canonicalMethod = $algorithm;
        }
        break;
      case 'http://www.w3.org/TR/1999/REC-xpath-19991116':
        $node = $transform->firstChild;
        while ($node) {
          if ($node->localName == 'XPath') {
            $arXPath = array();
            $arXPath['query'] = '(.//. | .//@* | .//namespace::*)[' . $node->nodeValue . ']';
            $arXPath['namespaces'] = array();
            $nslist = $xpath
              ->query('./namespace::*', $node);
            foreach ($nslist as $nsnode) {
              if ($nsnode->localName != "xml") {
                $arXPath['namespaces'][$nsnode->localName] = $nsnode->nodeValue;
              }
            }
            break;
          }
          $node = $node->nextSibling;
        }
        break;
    }
  }
  if ($data instanceof DOMNode) {
    $data = $this
      ->canonicalizeData($objData, $canonicalMethod, $arXPath, $prefixList);
  }
  return $data;
}