CanonicalXml.cs source code in C# .NET

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                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / Xml / CanonicalXml.cs / 1 / CanonicalXml.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// CanonicalXml.cs 
//
 
namespace System.Security.Cryptography.Xml {
    using System.Xml;
    using System.IO;
    using System.Text; 
    using System.Collections;
 
    internal class CanonicalXml { 
        private CanonicalXmlDocument m_c14nDoc;
        private C14NAncestralNamespaceContextManager m_ancMgr; 

        // private static String defaultXPathWithoutComments = "(//. | //@* | //namespace::*)[not(self::comment())]";
        // private static String defaultXPathWithoutComments = "(//. | //@* | //namespace::*)";
        // private static String defaultXPathWithComments = "(//. | //@* | //namespace::*)"; 
        // private static String defaultXPathWithComments = "(//. | //@* | //namespace::*)";
 
        internal CanonicalXml(Stream inputStream, bool includeComments, XmlResolver resolver, string strBaseUri) { 
            if (inputStream == null)
                throw new ArgumentNullException("inputStream"); 

            m_c14nDoc = new CanonicalXmlDocument(true, includeComments);
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(Utils.PreProcessStreamInput(inputStream, resolver, strBaseUri)); 
            m_ancMgr = new C14NAncestralNamespaceContextManager();
        } 
 
        internal CanonicalXml(XmlDocument document, XmlResolver resolver) : this(document, resolver, false) {}
        internal CanonicalXml(XmlDocument document, XmlResolver resolver, bool includeComments) { 
            if (document == null)
                throw new ArgumentNullException("document");

            m_c14nDoc = new CanonicalXmlDocument(true, includeComments); 
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(new XmlNodeReader(document)); 
            m_ancMgr = new C14NAncestralNamespaceContextManager(); 
        }
 
        internal CanonicalXml(XmlNodeList nodeList, XmlResolver resolver, bool includeComments) {
            if (nodeList == null)
                throw new ArgumentNullException("nodeList");
 
            XmlDocument doc = Utils.GetOwnerDocument(nodeList);
            if (doc == null) 
                throw new ArgumentException("nodeList"); 

            m_c14nDoc = new CanonicalXmlDocument(false, includeComments); 
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(new XmlNodeReader(doc));
            m_ancMgr = new C14NAncestralNamespaceContextManager();
 
            MarkInclusionStateForNodes(nodeList, doc, m_c14nDoc);
        } 
 
        static void MarkNodeAsIncluded(XmlNode node) {
            if (node is ICanonicalizableNode) 
               ((ICanonicalizableNode) node).IsInNodeSet = true;
        }

        private static void MarkInclusionStateForNodes(XmlNodeList nodeList, XmlDocument inputRoot, XmlDocument root) { 
            CanonicalXmlNodeList elementList = new CanonicalXmlNodeList();
            CanonicalXmlNodeList elementListCanonical = new CanonicalXmlNodeList(); 
            elementList.Add(inputRoot); 
            elementListCanonical.Add(root);
            int index = 0; 

            do {
                XmlNode currentNode = (XmlNode) elementList[index];
                XmlNode currentNodeCanonical = (XmlNode) elementListCanonical[index]; 
                XmlNodeList childNodes = currentNode.ChildNodes;
                XmlNodeList childNodesCanonical = currentNodeCanonical.ChildNodes; 
                for (int i = 0; i < childNodes.Count; i++) { 
                    elementList.Add(childNodes[i]);
                    elementListCanonical.Add(childNodesCanonical[i]); 

                    if (Utils.NodeInList(childNodes[i], nodeList)) {
                        MarkNodeAsIncluded(childNodesCanonical[i]);
                    } 

                    XmlAttributeCollection attribNodes = childNodes[i].Attributes; 
                    if (attribNodes != null) { 
                        for (int j = 0; j < attribNodes.Count; j++) {
                            if (Utils.NodeInList(attribNodes[j], nodeList)) { 
                                MarkNodeAsIncluded(childNodesCanonical[i].Attributes.Item(j));
                            }
                        }
                    } 
                }
                index++; 
            } while (index < elementList.Count); 
        }
 
        internal byte[] GetBytes() {
            StringBuilder sb = new StringBuilder();
            m_c14nDoc.Write(sb, DocPosition.BeforeRootElement, m_ancMgr);
            UTF8Encoding utf8 = new UTF8Encoding(false); 
            return utf8.GetBytes(sb.ToString());
        } 
 
        internal byte[] GetDigestedBytes(HashAlgorithm hash) {
            m_c14nDoc.WriteHash(hash, DocPosition.BeforeRootElement, m_ancMgr); 
            hash.TransformFinalBlock(new byte[0], 0, 0);
            byte[] res = (byte[]) hash.Hash.Clone();
            // reinitialize the hash so it is still usable after the call
            hash.Initialize(); 
            return res;
        } 
    } 

    // the stack of currently active NamespaceFrame contexts. this 
    // object also maintains the inclusive prefix list in a tokenized form.
    internal class C14NAncestralNamespaceContextManager : AncestralNamespaceContextManager {
        internal C14NAncestralNamespaceContextManager () {}
 
        private void GetNamespaceToRender(string nsPrefix, SortedList attrListToRender, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            foreach (object a in nsListToRender.GetKeyList()) { 
                if (Utils.HasNamespacePrefix((XmlAttribute) a, nsPrefix)) 
                    return;
            } 
            foreach (object a in attrListToRender.GetKeyList()) {
                if (((XmlAttribute) a).LocalName.Equals(nsPrefix))
                    return;
            } 

            int rDepth; 
            XmlAttribute local = (XmlAttribute) nsLocallyDeclared[nsPrefix]; 
            XmlAttribute rAncestral = GetNearestRenderedNamespaceWithMatchingPrefix(nsPrefix, out rDepth);
            if(local != null) { 
                if(Utils.IsNonRedundantNamespaceDecl(local, rAncestral)) {
                    nsLocallyDeclared.Remove(nsPrefix);
                    if (Utils.IsXmlNamespaceNode(local))
                        attrListToRender.Add(local, null); 
                    else
                        nsListToRender.Add(local, null); 
                } 
            } else {
                int uDepth; 
                XmlAttribute uAncestral = GetNearestUnrenderedNamespaceWithMatchingPrefix(nsPrefix, out uDepth);
                if (uAncestral != null && uDepth > rDepth && Utils.IsNonRedundantNamespaceDecl(uAncestral, rAncestral)) {
                    if(Utils.IsXmlNamespaceNode(uAncestral))
                        attrListToRender.Add(uAncestral, null); 
                    else
                        nsListToRender.Add(uAncestral,null); 
                } 
            }
        } 

        internal override void GetNamespacesToRender (XmlElement element, SortedList attrListToRender, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            XmlAttribute attrib = null;
            object[] attrs = new object[nsLocallyDeclared.Count]; 
            nsLocallyDeclared.Values.CopyTo(attrs,0);
            foreach(Object a in attrs) { 
                attrib = (XmlAttribute) a; 
                int rDepth;
                XmlAttribute rAncestral = GetNearestRenderedNamespaceWithMatchingPrefix(Utils.GetNamespacePrefix(attrib), out rDepth); 
                if(Utils.IsNonRedundantNamespaceDecl(attrib, rAncestral)) {
                    nsLocallyDeclared.Remove(Utils.GetNamespacePrefix(attrib));
                    if (Utils.IsXmlNamespaceNode(attrib))
                        attrListToRender.Add(attrib, null); 
                    else
                        nsListToRender.Add(attrib, null); 
                } 
            }
 
            for (int i = m_ancestorStack.Count - 1; i >= 0; i--) {
                foreach (Object a in GetScopeAt(i).GetUnrendered().Values) {
                    attrib = (XmlAttribute) a;
                    if (attrib != null) 
                        GetNamespaceToRender(Utils.GetNamespacePrefix(attrib), attrListToRender, nsListToRender, nsLocallyDeclared);
                } 
            } 
        }
 
        internal override void TrackNamespaceNode(XmlAttribute attr, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            nsLocallyDeclared.Add(Utils.GetNamespacePrefix(attr), attr);
        }
 
        internal override void TrackXmlNamespaceNode(XmlAttribute attr, SortedList nsListToRender, SortedList attrListToRender, Hashtable nsLocallyDeclared) {
            nsLocallyDeclared.Add(Utils.GetNamespacePrefix(attr), attr); 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// CanonicalXml.cs 
//
 
namespace System.Security.Cryptography.Xml {
    using System.Xml;
    using System.IO;
    using System.Text; 
    using System.Collections;
 
    internal class CanonicalXml { 
        private CanonicalXmlDocument m_c14nDoc;
        private C14NAncestralNamespaceContextManager m_ancMgr; 

        // private static String defaultXPathWithoutComments = "(//. | //@* | //namespace::*)[not(self::comment())]";
        // private static String defaultXPathWithoutComments = "(//. | //@* | //namespace::*)";
        // private static String defaultXPathWithComments = "(//. | //@* | //namespace::*)"; 
        // private static String defaultXPathWithComments = "(//. | //@* | //namespace::*)";
 
        internal CanonicalXml(Stream inputStream, bool includeComments, XmlResolver resolver, string strBaseUri) { 
            if (inputStream == null)
                throw new ArgumentNullException("inputStream"); 

            m_c14nDoc = new CanonicalXmlDocument(true, includeComments);
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(Utils.PreProcessStreamInput(inputStream, resolver, strBaseUri)); 
            m_ancMgr = new C14NAncestralNamespaceContextManager();
        } 
 
        internal CanonicalXml(XmlDocument document, XmlResolver resolver) : this(document, resolver, false) {}
        internal CanonicalXml(XmlDocument document, XmlResolver resolver, bool includeComments) { 
            if (document == null)
                throw new ArgumentNullException("document");

            m_c14nDoc = new CanonicalXmlDocument(true, includeComments); 
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(new XmlNodeReader(document)); 
            m_ancMgr = new C14NAncestralNamespaceContextManager(); 
        }
 
        internal CanonicalXml(XmlNodeList nodeList, XmlResolver resolver, bool includeComments) {
            if (nodeList == null)
                throw new ArgumentNullException("nodeList");
 
            XmlDocument doc = Utils.GetOwnerDocument(nodeList);
            if (doc == null) 
                throw new ArgumentException("nodeList"); 

            m_c14nDoc = new CanonicalXmlDocument(false, includeComments); 
            m_c14nDoc.XmlResolver = resolver;
            m_c14nDoc.Load(new XmlNodeReader(doc));
            m_ancMgr = new C14NAncestralNamespaceContextManager();
 
            MarkInclusionStateForNodes(nodeList, doc, m_c14nDoc);
        } 
 
        static void MarkNodeAsIncluded(XmlNode node) {
            if (node is ICanonicalizableNode) 
               ((ICanonicalizableNode) node).IsInNodeSet = true;
        }

        private static void MarkInclusionStateForNodes(XmlNodeList nodeList, XmlDocument inputRoot, XmlDocument root) { 
            CanonicalXmlNodeList elementList = new CanonicalXmlNodeList();
            CanonicalXmlNodeList elementListCanonical = new CanonicalXmlNodeList(); 
            elementList.Add(inputRoot); 
            elementListCanonical.Add(root);
            int index = 0; 

            do {
                XmlNode currentNode = (XmlNode) elementList[index];
                XmlNode currentNodeCanonical = (XmlNode) elementListCanonical[index]; 
                XmlNodeList childNodes = currentNode.ChildNodes;
                XmlNodeList childNodesCanonical = currentNodeCanonical.ChildNodes; 
                for (int i = 0; i < childNodes.Count; i++) { 
                    elementList.Add(childNodes[i]);
                    elementListCanonical.Add(childNodesCanonical[i]); 

                    if (Utils.NodeInList(childNodes[i], nodeList)) {
                        MarkNodeAsIncluded(childNodesCanonical[i]);
                    } 

                    XmlAttributeCollection attribNodes = childNodes[i].Attributes; 
                    if (attribNodes != null) { 
                        for (int j = 0; j < attribNodes.Count; j++) {
                            if (Utils.NodeInList(attribNodes[j], nodeList)) { 
                                MarkNodeAsIncluded(childNodesCanonical[i].Attributes.Item(j));
                            }
                        }
                    } 
                }
                index++; 
            } while (index < elementList.Count); 
        }
 
        internal byte[] GetBytes() {
            StringBuilder sb = new StringBuilder();
            m_c14nDoc.Write(sb, DocPosition.BeforeRootElement, m_ancMgr);
            UTF8Encoding utf8 = new UTF8Encoding(false); 
            return utf8.GetBytes(sb.ToString());
        } 
 
        internal byte[] GetDigestedBytes(HashAlgorithm hash) {
            m_c14nDoc.WriteHash(hash, DocPosition.BeforeRootElement, m_ancMgr); 
            hash.TransformFinalBlock(new byte[0], 0, 0);
            byte[] res = (byte[]) hash.Hash.Clone();
            // reinitialize the hash so it is still usable after the call
            hash.Initialize(); 
            return res;
        } 
    } 

    // the stack of currently active NamespaceFrame contexts. this 
    // object also maintains the inclusive prefix list in a tokenized form.
    internal class C14NAncestralNamespaceContextManager : AncestralNamespaceContextManager {
        internal C14NAncestralNamespaceContextManager () {}
 
        private void GetNamespaceToRender(string nsPrefix, SortedList attrListToRender, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            foreach (object a in nsListToRender.GetKeyList()) { 
                if (Utils.HasNamespacePrefix((XmlAttribute) a, nsPrefix)) 
                    return;
            } 
            foreach (object a in attrListToRender.GetKeyList()) {
                if (((XmlAttribute) a).LocalName.Equals(nsPrefix))
                    return;
            } 

            int rDepth; 
            XmlAttribute local = (XmlAttribute) nsLocallyDeclared[nsPrefix]; 
            XmlAttribute rAncestral = GetNearestRenderedNamespaceWithMatchingPrefix(nsPrefix, out rDepth);
            if(local != null) { 
                if(Utils.IsNonRedundantNamespaceDecl(local, rAncestral)) {
                    nsLocallyDeclared.Remove(nsPrefix);
                    if (Utils.IsXmlNamespaceNode(local))
                        attrListToRender.Add(local, null); 
                    else
                        nsListToRender.Add(local, null); 
                } 
            } else {
                int uDepth; 
                XmlAttribute uAncestral = GetNearestUnrenderedNamespaceWithMatchingPrefix(nsPrefix, out uDepth);
                if (uAncestral != null && uDepth > rDepth && Utils.IsNonRedundantNamespaceDecl(uAncestral, rAncestral)) {
                    if(Utils.IsXmlNamespaceNode(uAncestral))
                        attrListToRender.Add(uAncestral, null); 
                    else
                        nsListToRender.Add(uAncestral,null); 
                } 
            }
        } 

        internal override void GetNamespacesToRender (XmlElement element, SortedList attrListToRender, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            XmlAttribute attrib = null;
            object[] attrs = new object[nsLocallyDeclared.Count]; 
            nsLocallyDeclared.Values.CopyTo(attrs,0);
            foreach(Object a in attrs) { 
                attrib = (XmlAttribute) a; 
                int rDepth;
                XmlAttribute rAncestral = GetNearestRenderedNamespaceWithMatchingPrefix(Utils.GetNamespacePrefix(attrib), out rDepth); 
                if(Utils.IsNonRedundantNamespaceDecl(attrib, rAncestral)) {
                    nsLocallyDeclared.Remove(Utils.GetNamespacePrefix(attrib));
                    if (Utils.IsXmlNamespaceNode(attrib))
                        attrListToRender.Add(attrib, null); 
                    else
                        nsListToRender.Add(attrib, null); 
                } 
            }
 
            for (int i = m_ancestorStack.Count - 1; i >= 0; i--) {
                foreach (Object a in GetScopeAt(i).GetUnrendered().Values) {
                    attrib = (XmlAttribute) a;
                    if (attrib != null) 
                        GetNamespaceToRender(Utils.GetNamespacePrefix(attrib), attrListToRender, nsListToRender, nsLocallyDeclared);
                } 
            } 
        }
 
        internal override void TrackNamespaceNode(XmlAttribute attr, SortedList nsListToRender, Hashtable nsLocallyDeclared) {
            nsLocallyDeclared.Add(Utils.GetNamespacePrefix(attr), attr);
        }
 
        internal override void TrackXmlNamespaceNode(XmlAttribute attr, SortedList nsListToRender, SortedList attrListToRender, Hashtable nsLocallyDeclared) {
            nsLocallyDeclared.Add(Utils.GetNamespacePrefix(attr), attr); 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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