Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / Xml / Reference.cs / 1 / Reference.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//
// Reference.cs
//
// 21 [....] 2000
//
namespace System.Security.Cryptography.Xml
{
using System;
using System.IO;
using System.Net;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Xml;
using System.Globalization;
[Serializable]
internal enum ReferenceTargetType {
Stream,
XmlElement,
UriReference
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public class Reference {
private string m_id;
private string m_uri;
private string m_type;
private TransformChain m_transformChain;
private string m_digestMethod;
private byte[] m_digestValue;
private HashAlgorithm m_hashAlgorithm;
private Object m_refTarget;
private ReferenceTargetType m_refTargetType;
private XmlElement m_cachedXml;
private SignedXml m_signedXml = null;
internal CanonicalXmlNodeList m_namespaces = null;
//
// public constructors
//
public Reference () {
m_transformChain = new TransformChain();
m_refTarget = null;
m_refTargetType = ReferenceTargetType.UriReference;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
public Reference (Stream stream) {
m_transformChain = new TransformChain();
m_refTarget = stream;
m_refTargetType = ReferenceTargetType.Stream;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
public Reference (string uri) {
m_transformChain = new TransformChain();
m_refTarget = uri;
m_uri = uri;
m_refTargetType = ReferenceTargetType.UriReference;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
internal Reference (XmlElement element) {
m_transformChain = new TransformChain();
m_refTarget = element;
m_refTargetType = ReferenceTargetType.XmlElement;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
//
// public properties
//
public string Id {
get { return m_id; }
set { m_id = value; }
}
public string Uri {
get { return m_uri; }
set {
m_uri = value;
m_cachedXml = null;
}
}
public string Type {
get { return m_type; }
set {
m_type = value;
m_cachedXml = null;
}
}
public string DigestMethod {
get { return m_digestMethod; }
set {
m_digestMethod = value;
m_cachedXml = null;
}
}
public byte[] DigestValue {
get { return m_digestValue; }
set {
m_digestValue = value;
m_cachedXml = null;
}
}
public TransformChain TransformChain {
get {
if (m_transformChain == null)
m_transformChain = new TransformChain();
return m_transformChain;
}
[ComVisible(false)]
set {
m_transformChain = value;
m_cachedXml = null;
}
}
internal bool CacheValid {
get {
return (m_cachedXml != null);
}
}
internal SignedXml SignedXml {
get { return m_signedXml; }
set { m_signedXml = value; }
}
internal ReferenceTargetType ReferenceTargetType {
get {
return m_refTargetType;
}
}
//
// public methods
//
public XmlElement GetXml() {
if (CacheValid) return(m_cachedXml);
XmlDocument document = new XmlDocument();
document.PreserveWhitespace = true;
return GetXml(document);
}
internal XmlElement GetXml (XmlDocument document) {
// Create the Reference
XmlElement referenceElement = document.CreateElement("Reference", SignedXml.XmlDsigNamespaceUrl);
if (!String.IsNullOrEmpty(m_id))
referenceElement.SetAttribute("Id", m_id);
if (m_uri != null)
referenceElement.SetAttribute("URI", m_uri);
if (!String.IsNullOrEmpty(m_type))
referenceElement.SetAttribute("Type", m_type);
// Add the transforms to the Reference
if (this.TransformChain.Count != 0)
referenceElement.AppendChild(this.TransformChain.GetXml(document, SignedXml.XmlDsigNamespaceUrl));
// Add the DigestMethod
if (String.IsNullOrEmpty(m_digestMethod))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_DigestMethodRequired"));
XmlElement digestMethodElement = document.CreateElement("DigestMethod", SignedXml.XmlDsigNamespaceUrl);
digestMethodElement.SetAttribute("Algorithm",m_digestMethod);
referenceElement.AppendChild(digestMethodElement);
if (DigestValue == null) {
if (m_hashAlgorithm.Hash == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_DigestValueRequired"));
DigestValue = m_hashAlgorithm.Hash;
}
XmlElement digestValueElement = document.CreateElement("DigestValue", SignedXml.XmlDsigNamespaceUrl);
digestValueElement.AppendChild(document.CreateTextNode(Convert.ToBase64String(m_digestValue)));
referenceElement.AppendChild(digestValueElement);
return referenceElement;
}
public void LoadXml(XmlElement value) {
if (value == null)
throw new ArgumentNullException("value");
m_id = Utils.GetAttribute(value, "Id", SignedXml.XmlDsigNamespaceUrl);
m_uri = Utils.GetAttribute(value, "URI", SignedXml.XmlDsigNamespaceUrl);
m_type = Utils.GetAttribute(value, "Type", SignedXml.XmlDsigNamespaceUrl);
XmlNamespaceManager nsm = new XmlNamespaceManager(value.OwnerDocument.NameTable);
nsm.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);
// Transforms
this.TransformChain = new TransformChain();
XmlElement transformsElement = value.SelectSingleNode("ds:Transforms", nsm) as XmlElement;
if (transformsElement != null) {
XmlNodeList transformNodes = transformsElement.SelectNodes("ds:Transform", nsm);
if (transformNodes != null) {
foreach (XmlNode transformNode in transformNodes) {
XmlElement transformElement = transformNode as XmlElement;
string algorithm = Utils.GetAttribute(transformElement, "Algorithm", SignedXml.XmlDsigNamespaceUrl);
Transform transform = CryptoConfig.CreateFromName(algorithm) as Transform;
if (transform == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_UnknownTransform"));
AddTransform(transform);
// let the transform read the children of the transformElement for data
transform.LoadInnerXml(transformElement.ChildNodes);
// Hack! this is done to get around the lack of here() function support in XPath
if (transform is XmlDsigEnvelopedSignatureTransform) {
// Walk back to the Signature tag. Find the nearest signature ancestor
// Signature-->SignedInfo-->Reference-->Transforms-->Transform
XmlNode signatureTag = transformElement.SelectSingleNode("ancestor::ds:Signature[1]", nsm);
XmlNodeList signatureList = transformElement.SelectNodes("//ds:Signature", nsm);
if (signatureList != null) {
int position = 0;
foreach(XmlNode node in signatureList) {
position++;
if (node == signatureTag) {
((XmlDsigEnvelopedSignatureTransform)transform).SignaturePosition = position;
break;
}
}
}
}
}
}
}
// DigestMethod
XmlElement digestMethodElement = value.SelectSingleNode("ds:DigestMethod", nsm) as XmlElement;
if (digestMethodElement == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Reference/DigestMethod");
m_digestMethod = Utils.GetAttribute(digestMethodElement, "Algorithm", SignedXml.XmlDsigNamespaceUrl);
// DigestValue
XmlElement digestValueElement = value.SelectSingleNode("ds:DigestValue", nsm) as XmlElement;
if (digestValueElement == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Reference/DigestValue");
m_digestValue = Convert.FromBase64String(Utils.DiscardWhiteSpaces(digestValueElement.InnerText));
// cache the Xml
m_cachedXml = value;
}
public void AddTransform(Transform transform) {
if (transform == null)
throw new ArgumentNullException("transform");
transform.Reference = this;
this.TransformChain.Add(transform);
}
internal void UpdateHashValue(XmlDocument document, CanonicalXmlNodeList refList) {
DigestValue = CalculateHashValue(document, refList);
}
// What we want to do is pump the input throug the TransformChain and then
// hash the output of the chain document is the document context for resolving relative references
internal byte[] CalculateHashValue(XmlDocument document, CanonicalXmlNodeList refList) {
// refList is a list of elements that might be targets of references
// Now's the time to create our hashing algorithm
m_hashAlgorithm = CryptoConfig.CreateFromName(m_digestMethod) as HashAlgorithm;
if (m_hashAlgorithm == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_CreateHashAlgorithmFailed"));
// Let's go get the target.
string baseUri = (document == null ? System.Environment.CurrentDirectory + "\\" : document.BaseURI);
Stream hashInputStream = null;
WebRequest request = null;
WebResponse response = null;
Stream inputStream = null;
XmlResolver resolver = null;
byte[] hashval = null;
try {
switch (m_refTargetType) {
case ReferenceTargetType.Stream:
// This is the easiest case. We already have a stream, so just pump it through the TransformChain
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream((Stream) m_refTarget, resolver, baseUri);
break;
case ReferenceTargetType.UriReference:
// Second-easiest case -- dereference the URI & pump through the TransformChain
// handle the special cases where the URI is null (meaning whole doc)
// or the URI is just a fragment (meaning a reference to an embedded Object)
if (m_uri == null) {
// We need to create a DocumentNavigator out of the XmlElement
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
// In the case of a Uri-less reference, we will simply pass null to the transform chain.
// The first transform in the chain is expected to know how to retrieve the data to hash.
hashInputStream = this.TransformChain.TransformToOctetStream((Stream) null, resolver, baseUri);
} else if (m_uri.Length == 0) {
// This is the self-referential case. First, check that we have a document context.
// The Enveloped Signature does not discard comments as per spec; those will be omitted during the transform chain process
if (document == null)
throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Cryptography_Xml_SelfReferenceRequiresContext"), m_uri));
// Normalize the containing document
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
XmlDocument docWithNoComments = Utils.DiscardComments(Utils.PreProcessDocumentInput(document, resolver, baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(docWithNoComments, resolver, baseUri);
} else if (m_uri[0] == '#') {
// If we get here, then we are constructing a Reference to an embedded DataObject
// referenced by an Id = attribute. Go find the relevant object
bool discardComments = true;
string idref = Utils.GetIdFromLocalUri(m_uri, out discardComments);
if (idref == "xpointer(/)") {
// This is a self referencial case
if (document == null)
throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Cryptography_Xml_SelfReferenceRequiresContext"),m_uri));
// We should not discard comments here!!!
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(Utils.PreProcessDocumentInput(document, resolver, baseUri), resolver, baseUri);
break;
}
XmlElement elem = this.SignedXml.GetIdElement(document, idref);
if (elem != null)
m_namespaces = Utils.GetPropagatedAttributes(elem.ParentNode as XmlElement);
if (elem == null) {
// Go throw the referenced items passed in
if (refList != null) {
foreach (XmlNode node in refList) {
XmlElement tempElem = node as XmlElement;
if ((tempElem != null) && (Utils.HasAttribute(tempElem, "Id", SignedXml.XmlDsigNamespaceUrl))
&& (Utils.GetAttribute(tempElem, "Id", SignedXml.XmlDsigNamespaceUrl).Equals(idref))) {
elem = tempElem;
if (this.m_signedXml.m_context != null)
m_namespaces = Utils.GetPropagatedAttributes(this.m_signedXml.m_context);
break;
}
}
}
}
if (elem == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidReference"));
XmlDocument normDocument = Utils.PreProcessElementInput(elem, resolver, baseUri);
// Add the propagated attributes
Utils.AddNamespaces(normDocument.DocumentElement, m_namespaces);
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
if (discardComments) {
// We should discard comments before going into the transform chain
XmlDocument docWithNoComments = Utils.DiscardComments(normDocument);
hashInputStream = this.TransformChain.TransformToOctetStream(docWithNoComments, resolver, baseUri);
} else {
// This is an XPointer reference, do not discard comments!!!
hashInputStream = this.TransformChain.TransformToOctetStream(normDocument, resolver, baseUri);
}
} else {
// WebRequest always expects an Absolute Uri, so try to resolve if we were passed a relative Uri.
System.Uri uri = new System.Uri(m_uri, UriKind.RelativeOrAbsolute);
if (!uri.IsAbsoluteUri) {
uri = new Uri(new Uri(baseUri), uri);
}
request = WebRequest.Create(uri);
if (request == null) goto default;
response = request.GetResponse();
if (response == null) goto default;
inputStream = response.GetResponseStream();
if (inputStream == null) goto default;
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(inputStream, resolver, m_uri);
}
break;
case ReferenceTargetType.XmlElement:
// We need to create a DocumentNavigator out of the XmlElement
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(Utils.PreProcessElementInput((XmlElement) m_refTarget, resolver, baseUri), resolver, baseUri);
break;
default:
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_UriNotResolved"), m_uri);
}
// Compute the new hash value
hashval = m_hashAlgorithm.ComputeHash(hashInputStream);
}
finally {
if (hashInputStream != null)
hashInputStream.Close();
if (response != null)
response.Close();
if (inputStream != null)
inputStream.Close();
}
return hashval;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//
// Reference.cs
//
// 21 [....] 2000
//
namespace System.Security.Cryptography.Xml
{
using System;
using System.IO;
using System.Net;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Xml;
using System.Globalization;
[Serializable]
internal enum ReferenceTargetType {
Stream,
XmlElement,
UriReference
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public class Reference {
private string m_id;
private string m_uri;
private string m_type;
private TransformChain m_transformChain;
private string m_digestMethod;
private byte[] m_digestValue;
private HashAlgorithm m_hashAlgorithm;
private Object m_refTarget;
private ReferenceTargetType m_refTargetType;
private XmlElement m_cachedXml;
private SignedXml m_signedXml = null;
internal CanonicalXmlNodeList m_namespaces = null;
//
// public constructors
//
public Reference () {
m_transformChain = new TransformChain();
m_refTarget = null;
m_refTargetType = ReferenceTargetType.UriReference;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
public Reference (Stream stream) {
m_transformChain = new TransformChain();
m_refTarget = stream;
m_refTargetType = ReferenceTargetType.Stream;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
public Reference (string uri) {
m_transformChain = new TransformChain();
m_refTarget = uri;
m_uri = uri;
m_refTargetType = ReferenceTargetType.UriReference;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
internal Reference (XmlElement element) {
m_transformChain = new TransformChain();
m_refTarget = element;
m_refTargetType = ReferenceTargetType.XmlElement;
m_cachedXml = null;
m_digestMethod = SignedXml.XmlDsigSHA1Url;
}
//
// public properties
//
public string Id {
get { return m_id; }
set { m_id = value; }
}
public string Uri {
get { return m_uri; }
set {
m_uri = value;
m_cachedXml = null;
}
}
public string Type {
get { return m_type; }
set {
m_type = value;
m_cachedXml = null;
}
}
public string DigestMethod {
get { return m_digestMethod; }
set {
m_digestMethod = value;
m_cachedXml = null;
}
}
public byte[] DigestValue {
get { return m_digestValue; }
set {
m_digestValue = value;
m_cachedXml = null;
}
}
public TransformChain TransformChain {
get {
if (m_transformChain == null)
m_transformChain = new TransformChain();
return m_transformChain;
}
[ComVisible(false)]
set {
m_transformChain = value;
m_cachedXml = null;
}
}
internal bool CacheValid {
get {
return (m_cachedXml != null);
}
}
internal SignedXml SignedXml {
get { return m_signedXml; }
set { m_signedXml = value; }
}
internal ReferenceTargetType ReferenceTargetType {
get {
return m_refTargetType;
}
}
//
// public methods
//
public XmlElement GetXml() {
if (CacheValid) return(m_cachedXml);
XmlDocument document = new XmlDocument();
document.PreserveWhitespace = true;
return GetXml(document);
}
internal XmlElement GetXml (XmlDocument document) {
// Create the Reference
XmlElement referenceElement = document.CreateElement("Reference", SignedXml.XmlDsigNamespaceUrl);
if (!String.IsNullOrEmpty(m_id))
referenceElement.SetAttribute("Id", m_id);
if (m_uri != null)
referenceElement.SetAttribute("URI", m_uri);
if (!String.IsNullOrEmpty(m_type))
referenceElement.SetAttribute("Type", m_type);
// Add the transforms to the Reference
if (this.TransformChain.Count != 0)
referenceElement.AppendChild(this.TransformChain.GetXml(document, SignedXml.XmlDsigNamespaceUrl));
// Add the DigestMethod
if (String.IsNullOrEmpty(m_digestMethod))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_DigestMethodRequired"));
XmlElement digestMethodElement = document.CreateElement("DigestMethod", SignedXml.XmlDsigNamespaceUrl);
digestMethodElement.SetAttribute("Algorithm",m_digestMethod);
referenceElement.AppendChild(digestMethodElement);
if (DigestValue == null) {
if (m_hashAlgorithm.Hash == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_DigestValueRequired"));
DigestValue = m_hashAlgorithm.Hash;
}
XmlElement digestValueElement = document.CreateElement("DigestValue", SignedXml.XmlDsigNamespaceUrl);
digestValueElement.AppendChild(document.CreateTextNode(Convert.ToBase64String(m_digestValue)));
referenceElement.AppendChild(digestValueElement);
return referenceElement;
}
public void LoadXml(XmlElement value) {
if (value == null)
throw new ArgumentNullException("value");
m_id = Utils.GetAttribute(value, "Id", SignedXml.XmlDsigNamespaceUrl);
m_uri = Utils.GetAttribute(value, "URI", SignedXml.XmlDsigNamespaceUrl);
m_type = Utils.GetAttribute(value, "Type", SignedXml.XmlDsigNamespaceUrl);
XmlNamespaceManager nsm = new XmlNamespaceManager(value.OwnerDocument.NameTable);
nsm.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);
// Transforms
this.TransformChain = new TransformChain();
XmlElement transformsElement = value.SelectSingleNode("ds:Transforms", nsm) as XmlElement;
if (transformsElement != null) {
XmlNodeList transformNodes = transformsElement.SelectNodes("ds:Transform", nsm);
if (transformNodes != null) {
foreach (XmlNode transformNode in transformNodes) {
XmlElement transformElement = transformNode as XmlElement;
string algorithm = Utils.GetAttribute(transformElement, "Algorithm", SignedXml.XmlDsigNamespaceUrl);
Transform transform = CryptoConfig.CreateFromName(algorithm) as Transform;
if (transform == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_UnknownTransform"));
AddTransform(transform);
// let the transform read the children of the transformElement for data
transform.LoadInnerXml(transformElement.ChildNodes);
// Hack! this is done to get around the lack of here() function support in XPath
if (transform is XmlDsigEnvelopedSignatureTransform) {
// Walk back to the Signature tag. Find the nearest signature ancestor
// Signature-->SignedInfo-->Reference-->Transforms-->Transform
XmlNode signatureTag = transformElement.SelectSingleNode("ancestor::ds:Signature[1]", nsm);
XmlNodeList signatureList = transformElement.SelectNodes("//ds:Signature", nsm);
if (signatureList != null) {
int position = 0;
foreach(XmlNode node in signatureList) {
position++;
if (node == signatureTag) {
((XmlDsigEnvelopedSignatureTransform)transform).SignaturePosition = position;
break;
}
}
}
}
}
}
}
// DigestMethod
XmlElement digestMethodElement = value.SelectSingleNode("ds:DigestMethod", nsm) as XmlElement;
if (digestMethodElement == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Reference/DigestMethod");
m_digestMethod = Utils.GetAttribute(digestMethodElement, "Algorithm", SignedXml.XmlDsigNamespaceUrl);
// DigestValue
XmlElement digestValueElement = value.SelectSingleNode("ds:DigestValue", nsm) as XmlElement;
if (digestValueElement == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Reference/DigestValue");
m_digestValue = Convert.FromBase64String(Utils.DiscardWhiteSpaces(digestValueElement.InnerText));
// cache the Xml
m_cachedXml = value;
}
public void AddTransform(Transform transform) {
if (transform == null)
throw new ArgumentNullException("transform");
transform.Reference = this;
this.TransformChain.Add(transform);
}
internal void UpdateHashValue(XmlDocument document, CanonicalXmlNodeList refList) {
DigestValue = CalculateHashValue(document, refList);
}
// What we want to do is pump the input throug the TransformChain and then
// hash the output of the chain document is the document context for resolving relative references
internal byte[] CalculateHashValue(XmlDocument document, CanonicalXmlNodeList refList) {
// refList is a list of elements that might be targets of references
// Now's the time to create our hashing algorithm
m_hashAlgorithm = CryptoConfig.CreateFromName(m_digestMethod) as HashAlgorithm;
if (m_hashAlgorithm == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_CreateHashAlgorithmFailed"));
// Let's go get the target.
string baseUri = (document == null ? System.Environment.CurrentDirectory + "\\" : document.BaseURI);
Stream hashInputStream = null;
WebRequest request = null;
WebResponse response = null;
Stream inputStream = null;
XmlResolver resolver = null;
byte[] hashval = null;
try {
switch (m_refTargetType) {
case ReferenceTargetType.Stream:
// This is the easiest case. We already have a stream, so just pump it through the TransformChain
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream((Stream) m_refTarget, resolver, baseUri);
break;
case ReferenceTargetType.UriReference:
// Second-easiest case -- dereference the URI & pump through the TransformChain
// handle the special cases where the URI is null (meaning whole doc)
// or the URI is just a fragment (meaning a reference to an embedded Object)
if (m_uri == null) {
// We need to create a DocumentNavigator out of the XmlElement
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
// In the case of a Uri-less reference, we will simply pass null to the transform chain.
// The first transform in the chain is expected to know how to retrieve the data to hash.
hashInputStream = this.TransformChain.TransformToOctetStream((Stream) null, resolver, baseUri);
} else if (m_uri.Length == 0) {
// This is the self-referential case. First, check that we have a document context.
// The Enveloped Signature does not discard comments as per spec; those will be omitted during the transform chain process
if (document == null)
throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Cryptography_Xml_SelfReferenceRequiresContext"), m_uri));
// Normalize the containing document
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
XmlDocument docWithNoComments = Utils.DiscardComments(Utils.PreProcessDocumentInput(document, resolver, baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(docWithNoComments, resolver, baseUri);
} else if (m_uri[0] == '#') {
// If we get here, then we are constructing a Reference to an embedded DataObject
// referenced by an Id = attribute. Go find the relevant object
bool discardComments = true;
string idref = Utils.GetIdFromLocalUri(m_uri, out discardComments);
if (idref == "xpointer(/)") {
// This is a self referencial case
if (document == null)
throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Cryptography_Xml_SelfReferenceRequiresContext"),m_uri));
// We should not discard comments here!!!
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(Utils.PreProcessDocumentInput(document, resolver, baseUri), resolver, baseUri);
break;
}
XmlElement elem = this.SignedXml.GetIdElement(document, idref);
if (elem != null)
m_namespaces = Utils.GetPropagatedAttributes(elem.ParentNode as XmlElement);
if (elem == null) {
// Go throw the referenced items passed in
if (refList != null) {
foreach (XmlNode node in refList) {
XmlElement tempElem = node as XmlElement;
if ((tempElem != null) && (Utils.HasAttribute(tempElem, "Id", SignedXml.XmlDsigNamespaceUrl))
&& (Utils.GetAttribute(tempElem, "Id", SignedXml.XmlDsigNamespaceUrl).Equals(idref))) {
elem = tempElem;
if (this.m_signedXml.m_context != null)
m_namespaces = Utils.GetPropagatedAttributes(this.m_signedXml.m_context);
break;
}
}
}
}
if (elem == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidReference"));
XmlDocument normDocument = Utils.PreProcessElementInput(elem, resolver, baseUri);
// Add the propagated attributes
Utils.AddNamespaces(normDocument.DocumentElement, m_namespaces);
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
if (discardComments) {
// We should discard comments before going into the transform chain
XmlDocument docWithNoComments = Utils.DiscardComments(normDocument);
hashInputStream = this.TransformChain.TransformToOctetStream(docWithNoComments, resolver, baseUri);
} else {
// This is an XPointer reference, do not discard comments!!!
hashInputStream = this.TransformChain.TransformToOctetStream(normDocument, resolver, baseUri);
}
} else {
// WebRequest always expects an Absolute Uri, so try to resolve if we were passed a relative Uri.
System.Uri uri = new System.Uri(m_uri, UriKind.RelativeOrAbsolute);
if (!uri.IsAbsoluteUri) {
uri = new Uri(new Uri(baseUri), uri);
}
request = WebRequest.Create(uri);
if (request == null) goto default;
response = request.GetResponse();
if (response == null) goto default;
inputStream = response.GetResponseStream();
if (inputStream == null) goto default;
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(inputStream, resolver, m_uri);
}
break;
case ReferenceTargetType.XmlElement:
// We need to create a DocumentNavigator out of the XmlElement
resolver = (this.SignedXml.ResolverSet ? this.SignedXml.m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), baseUri));
hashInputStream = this.TransformChain.TransformToOctetStream(Utils.PreProcessElementInput((XmlElement) m_refTarget, resolver, baseUri), resolver, baseUri);
break;
default:
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_UriNotResolved"), m_uri);
}
// Compute the new hash value
hashval = m_hashAlgorithm.ComputeHash(hashInputStream);
}
finally {
if (hashInputStream != null)
hashInputStream.Close();
if (response != null)
response.Close();
if (inputStream != null)
inputStream.Close();
}
return hashval;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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- FieldToken.cs
- DynamicPropertyReader.cs
- VisualBasicValue.cs
- AuthenticationManager.cs
- BindableTemplateBuilder.cs
- BitmapPalettes.cs
- FigureParagraph.cs
- Section.cs
- ItemList.cs
- SqlClientWrapperSmiStreamChars.cs
- BaseTransportHeaders.cs
- BasePropertyDescriptor.cs
- CodeGenerator.cs
- XmlEncApr2001.cs
- _DigestClient.cs
- RegisteredScript.cs
- PermissionToken.cs
- DummyDataSource.cs
- KeyEvent.cs
- TextFormatter.cs
- StylusCollection.cs
- TraceListeners.cs
- XmlQualifiedName.cs
- Interop.cs
- DiscardableAttribute.cs
- ProfileInfo.cs
- SystemResourceHost.cs
- HighContrastHelper.cs
- MapPathBasedVirtualPathProvider.cs
- QuadraticBezierSegment.cs
- AliasExpr.cs
- ListViewItem.cs
- DiagnosticTrace.cs
- Message.cs
- CodeLinePragma.cs
- ChangesetResponse.cs
- CellNormalizer.cs
- MemberAccessException.cs
- X509CertificateChain.cs
- ToolZone.cs
- BatchStream.cs
- ControlValuePropertyAttribute.cs
- EllipticalNodeOperations.cs
- _NegoStream.cs
- PickDesigner.xaml.cs
- XhtmlCssHandler.cs
- EncoderParameter.cs
- CodeTypeConstructor.cs
- MappingSource.cs
- StructuralObject.cs
- CqlLexerHelpers.cs
- SQLDouble.cs
- SessionEndedEventArgs.cs
- LocalizationComments.cs
- IntersectQueryOperator.cs
- Point3DAnimationBase.cs
- OutputCacheProfileCollection.cs
- KeyEvent.cs
- StylusButtonEventArgs.cs
- MexServiceChannelBuilder.cs
- DateTimeSerializationSection.cs
- ArrangedElementCollection.cs
- CreateRefExpr.cs
- ValidatingPropertiesEventArgs.cs
- DetailsViewRowCollection.cs
- MdImport.cs
- SmtpDigestAuthenticationModule.cs
- ParseHttpDate.cs
- ConnectionConsumerAttribute.cs
- TimeStampChecker.cs
- StorageAssociationSetMapping.cs
- HashHelper.cs
- DBConnectionString.cs
- SynthesizerStateChangedEventArgs.cs
- WindowShowOrOpenTracker.cs
- MeasurementDCInfo.cs
- GeneralTransform3D.cs
- PageClientProxyGenerator.cs
- HostTimeoutsElement.cs
- CultureInfoConverter.cs
- WebPartDesigner.cs
- PTProvider.cs
- DictionaryEntry.cs
- QuaternionAnimation.cs
- SqlTransaction.cs
- XmlCountingReader.cs
- ToolStripContainerActionList.cs
- GridViewSelectEventArgs.cs
- DataGridColumn.cs
- SecurityUniqueId.cs
- ToolstripProfessionalRenderer.cs
- OuterGlowBitmapEffect.cs
- GlyphRunDrawing.cs
- ListenerHandler.cs
- ListViewInsertEventArgs.cs
- SoapMessage.cs
- RayHitTestParameters.cs
- PageWrapper.cs
- MetadataItem.cs
- Wizard.cs