sso

node_modules/xml-crypto/lib/exclusive-canonicalization.js

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+/* jshint laxcomma: true */
+var utils = require('./utils');
+
+exports.ExclusiveCanonicalization = ExclusiveCanonicalization;
+exports.ExclusiveCanonicalizationWithComments = ExclusiveCanonicalizationWithComments;
+
+function ExclusiveCanonicalization() {
+	this.includeComments = false;
+};
+
+ExclusiveCanonicalization.prototype.attrCompare = function(a,b) {
+  if (!a.namespaceURI && b.namespaceURI) { return -1; }
+  if (!b.namespaceURI && a.namespaceURI) { return 1; }
+
+  var left = a.namespaceURI + a.localName
+  var right = b.namespaceURI + b.localName
+
+  if (left===right) return 0
+  else if (left<right) return -1
+  else return 1
+
+};
+
+ExclusiveCanonicalization.prototype.nsCompare = function(a,b) {
+  var attr1 = a.prefix;
+  var attr2 = b.prefix;
+  if (attr1 == attr2) { return 0; }
+  return attr1.localeCompare(attr2);
+};
+
+ExclusiveCanonicalization.prototype.renderAttrs = function(node, defaultNS) {
+  var a, i, attr
+    , res = []
+    , attrListToRender = [];
+
+  if (node.nodeType===8) { return this.renderComment(node); }
+
+  if (node.attributes) {
+    for (i = 0; i < node.attributes.length; ++i) {
+      attr = node.attributes[i];
+      //ignore namespace definition attributes
+      if (attr.name.indexOf("xmlns") === 0) { continue; }
+      attrListToRender.push(attr);
+    }
+  }
+
+  attrListToRender.sort(this.attrCompare);
+
+  for (a in attrListToRender) {
+    if (!attrListToRender.hasOwnProperty(a)) { continue; }
+
+    attr = attrListToRender[a];
+    res.push(" ", attr.name, '="', utils.encodeSpecialCharactersInAttribute(attr.value), '"');
+  }
+
+  return res.join("");
+};
+
+function isPrefixInScope(prefixesInScope, prefix, namespaceURI)
+{
+  var ret = false;
+  prefixesInScope.forEach(function (pf) {
+    if (pf.prefix === prefix && pf.namespaceURI === namespaceURI) {
+      ret = true;
+    }
+  })
+
+  return ret;
+}
+
+/**
+ * Create the string of all namespace declarations that should appear on this element
+ *
+ * @param {Node} node. The node we now render
+ * @param {Array} prefixesInScope. The prefixes defined on this node
+ *                parents which are a part of the output set
+ * @param {String} defaultNs. The current default namespace
+ * @return {String}
+ * @api private
+ */
+ExclusiveCanonicalization.prototype.renderNs = function(node, prefixesInScope, defaultNs, defaultNsForPrefix, inclusiveNamespacesPrefixList) {
+  var a, i, p, attr
+    , res = []
+    , newDefaultNs = defaultNs
+    , nsListToRender = []
+    , currNs = node.namespaceURI || "";
+
+  //handle the namespaceof the node itself
+  if (node.prefix) {
+    if (!isPrefixInScope(prefixesInScope, node.prefix, node.namespaceURI || defaultNsForPrefix[node.prefix])) {
+      nsListToRender.push({"prefix": node.prefix, "namespaceURI": node.namespaceURI || defaultNsForPrefix[node.prefix]});
+      prefixesInScope.push({"prefix": node.prefix, "namespaceURI": node.namespaceURI || defaultNsForPrefix[node.prefix]});
+    }
+  }
+  else if (defaultNs!=currNs) {
+      //new default ns
+      newDefaultNs = node.namespaceURI;
+      res.push(' xmlns="', newDefaultNs, '"');
+  }
+
+  //handle the attributes namespace
+  if (node.attributes) {
+    for (i = 0; i < node.attributes.length; ++i) {
+      attr = node.attributes[i];
+
+      //handle all prefixed attributes that are included in the prefix list and where
+      //the prefix is not defined already
+      if (attr.prefix && !isPrefixInScope(prefixesInScope, attr.localName, attr.value) && inclusiveNamespacesPrefixList.indexOf(attr.localName) >= 0) {
+        nsListToRender.push({"prefix": attr.localName, "namespaceURI": attr.value});
+        prefixesInScope.push({"prefix": attr.localName, "namespaceURI": attr.value});
+      }
+
+      //handle all prefixed attributes that are not xmlns definitions and where
+      //the prefix is not defined already
+      if (attr.prefix && !isPrefixInScope(prefixesInScope, attr.prefix, attr.namespaceURI) && attr.prefix!="xmlns" && attr.prefix!="xml") {
+        nsListToRender.push({"prefix": attr.prefix, "namespaceURI": attr.namespaceURI});
+        prefixesInScope.push({"prefix": attr.prefix, "namespaceURI": attr.namespaceURI});
+      }
+    }
+  }
+
+  nsListToRender.sort(this.nsCompare);
+
+  //render namespaces
+  for (a in nsListToRender) {
+    if (!nsListToRender.hasOwnProperty(a)) { continue; }
+
+    p = nsListToRender[a];
+    res.push(" xmlns:", p.prefix, '="', p.namespaceURI, '"');
+  }
+
+  return {"rendered": res.join(""), "newDefaultNs": newDefaultNs};
+};
+
+ExclusiveCanonicalization.prototype.processInner = function(node, prefixesInScope, defaultNs, defaultNsForPrefix, inclusiveNamespacesPrefixList) {
+
+  if (node.nodeType === 8) { return this.renderComment(node); }
+  if (node.data) { return utils.encodeSpecialCharactersInText(node.data); }
+
+  var i, pfxCopy
+    , ns = this.renderNs(node, prefixesInScope, defaultNs, defaultNsForPrefix, inclusiveNamespacesPrefixList)
+    , res = ["<", node.tagName, ns.rendered, this.renderAttrs(node, ns.newDefaultNs), ">"];
+
+  for (i = 0; i < node.childNodes.length; ++i) {
+    pfxCopy = prefixesInScope.slice(0);
+    res.push(this.processInner(node.childNodes[i], pfxCopy, ns.newDefaultNs, defaultNsForPrefix, inclusiveNamespacesPrefixList));
+  }
+
+  res.push("</", node.tagName, ">");
+  return res.join("");
+};
+
+// Thanks to deoxxa/xml-c14n for comment renderer
+ExclusiveCanonicalization.prototype.renderComment = function (node) {
+
+  if (!this.includeComments) { return ""; }
+
+  var isOutsideDocument = (node.ownerDocument === node.parentNode),
+      isBeforeDocument = null,
+      isAfterDocument = null;
+
+  if (isOutsideDocument) {
+    var nextNode = node,
+        previousNode = node;
+
+    while (nextNode !== null) {
+      if (nextNode === node.ownerDocument.documentElement) {
+        isBeforeDocument = true;
+        break;
+      }
+
+      nextNode = nextNode.nextSibling;
+    }
+
+    while (previousNode !== null) {
+      if (previousNode === node.ownerDocument.documentElement) {
+        isAfterDocument = true;
+        break;
+      }
+
+      previousNode = previousNode.previousSibling;
+    }
+  }
+
+  return (isAfterDocument ? "\n" : "") + "<!--" + utils.encodeSpecialCharactersInText(node.data) + "-->" + (isBeforeDocument ? "\n" : "");
+};
+
+/**
+ * Perform canonicalization of the given node
+ *
+ * @param {Node} node
+ * @return {String}
+ * @api public
+ */
+ExclusiveCanonicalization.prototype.process = function(node, options) {
+  options = options || {};
+  var inclusiveNamespacesPrefixList = options.inclusiveNamespacesPrefixList || [];
+  var defaultNs = options.defaultNs || "";
+  var defaultNsForPrefix = options.defaultNsForPrefix || {};
+  if (!(inclusiveNamespacesPrefixList instanceof Array)) { inclusiveNamespacesPrefixList = inclusiveNamespacesPrefixList.split(' '); }
+
+  var ancestorNamespaces = options.ancestorNamespaces || [];
+  
+  /**
+   * If the inclusiveNamespacesPrefixList has not been explicitly provided then look it up in CanonicalizationMethod/InclusiveNamespaces
+   */  
+  if (inclusiveNamespacesPrefixList.length == 0) {
+    var CanonicalizationMethod = utils.findChilds(node, "CanonicalizationMethod")
+    if (CanonicalizationMethod.length != 0) {
+      var inclusiveNamespaces = utils.findChilds(CanonicalizationMethod[0], "InclusiveNamespaces")
+      if (inclusiveNamespaces.length != 0) {
+          inclusiveNamespacesPrefixList = inclusiveNamespaces[0].getAttribute('PrefixList').split(" ");
+      }
+    }
+  }
+  
+  /**
+   * If you have a PrefixList then use it and the ancestors to add the necessary namespaces
+   */
+  if (inclusiveNamespacesPrefixList) {
+    var prefixList = inclusiveNamespacesPrefixList instanceof Array ? inclusiveNamespacesPrefixList : inclusiveNamespacesPrefixList.split(' ');
+    prefixList.forEach(function (prefix) {
+      if (ancestorNamespaces)  {
+        ancestorNamespaces.forEach(function (ancestorNamespace) {
+          if (prefix == ancestorNamespace.prefix) {
+            node.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:' + prefix, ancestorNamespace.namespaceURI);
+          }
+        })
+      }
+    })
+  }
+
+  var res = this.processInner(node, [], defaultNs, defaultNsForPrefix, inclusiveNamespacesPrefixList);
+  return res;
+};
+
+ExclusiveCanonicalization.prototype.getAlgorithmName = function() {
+  return "http://www.w3.org/2001/10/xml-exc-c14n#";
+};
+
+// Add c14n#WithComments here (very simple subclass)
+exports.ExclusiveCanonicalizationWithComments = ExclusiveCanonicalizationWithComments;
+
+function ExclusiveCanonicalizationWithComments() {
+	ExclusiveCanonicalization.call(this);
+	this.includeComments = true;
+};
+
+ExclusiveCanonicalizationWithComments.prototype = Object.create(ExclusiveCanonicalization.prototype);
+
+ExclusiveCanonicalizationWithComments.prototype.constructor = ExclusiveCanonicalizationWithComments;
+
+ExclusiveCanonicalizationWithComments.prototype.getAlgorithmName = function() {
+  return "http://www.w3.org/2001/10/xml-exc-c14n#WithComments";
+};