Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / PreDigestedSignedInfo.cs / 1305376 / PreDigestedSignedInfo.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.IdentityModel { using System.Diagnostics; using System.IO; using System.Security.Cryptography; using System.IdentityModel.Tokens; using System.Text; using System.Xml; sealed class PreDigestedSignedInfo : SignedInfo { const int InitialReferenceArraySize = 8; bool addEnvelopedSignatureTransform; int count; string digestMethod; XmlDictionaryString digestMethodDictionaryString; ReferenceEntry[] references; public PreDigestedSignedInfo(DictionaryManager dictionaryManager) : base(dictionaryManager) { this.references = new ReferenceEntry[InitialReferenceArraySize]; } public PreDigestedSignedInfo(DictionaryManager dictionaryManager, string canonicalizationMethod, XmlDictionaryString canonicalizationMethodDictionaryString, string digestMethod, XmlDictionaryString digestMethodDictionaryString, string signatureMethod, XmlDictionaryString signatureMethodDictionaryString) : base(dictionaryManager) { this.references = new ReferenceEntry[InitialReferenceArraySize]; this.CanonicalizationMethod = canonicalizationMethod; this.CanonicalizationMethodDictionaryString = canonicalizationMethodDictionaryString; this.DigestMethod = digestMethod; this.digestMethodDictionaryString = digestMethodDictionaryString; this.SignatureMethod = signatureMethod; this.SignatureMethodDictionaryString = signatureMethodDictionaryString; } public bool AddEnvelopedSignatureTransform { get { return this.addEnvelopedSignatureTransform; } set { this.addEnvelopedSignatureTransform = value; } } public string DigestMethod { get { return this.digestMethod; } set { this.digestMethod = value; } } public override int ReferenceCount { get { return this.count; } } public void AddReference(string id, byte[] digest) { if (this.count == this.references.Length) { ReferenceEntry[] newReferences = new ReferenceEntry[this.references.Length * 2]; Array.Copy(this.references, 0, newReferences, 0, this.count); this.references = newReferences; } this.references[this.count++].Set(id, digest); } protected override void ComputeHash(HashStream hashStream) { if (this.AddEnvelopedSignatureTransform) { base.ComputeHash(hashStream); } else { SignedInfoCanonicalFormWriter.Instance.WriteSignedInfoCanonicalForm( hashStream, this.SignatureMethod, this.DigestMethod, this.references, this.count, this.ResourcePool.TakeEncodingBuffer(), this.ResourcePool.TakeBase64Buffer()); } } public override void ComputeReferenceDigests() { // all digests pre-computed } public override void ReadFrom(XmlDictionaryReader reader, TransformFactory transformFactory, DictionaryManager dictionaryManager) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException()); // sender side use only } public override void EnsureAllReferencesVerified() { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException()); // sender side use only } public override bool EnsureDigestValidityIfIdMatches(string id, object resolvedXmlSource) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException()); // sender side use only } public override void WriteTo(XmlDictionaryWriter writer, DictionaryManager dictionaryManager) { string prefix = XmlSignatureStrings.Prefix; XmlDictionaryString ns = dictionaryManager.XmlSignatureDictionary.Namespace; writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.SignedInfo, ns); if (this.Id != null) { writer.WriteAttributeString(dictionaryManager.UtilityDictionary.IdAttribute, null, this.Id); } WriteCanonicalizationMethod(writer, dictionaryManager); WriteSignatureMethod(writer, dictionaryManager); for (int i = 0; i < this.count; i++) { writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.Reference, ns); writer.WriteStartAttribute(dictionaryManager.XmlSignatureDictionary.URI, null); writer.WriteString("#"); writer.WriteString(this.references[i].id); writer.WriteEndAttribute(); writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.Transforms, ns); if (this.addEnvelopedSignatureTransform) { writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.Transform, ns); writer.WriteStartAttribute(dictionaryManager.XmlSignatureDictionary.Algorithm, null); writer.WriteString(dictionaryManager.XmlSignatureDictionary.EnvelopedSignature); writer.WriteEndAttribute(); writer.WriteEndElement(); // Transform } writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.Transform, ns); writer.WriteStartAttribute(dictionaryManager.XmlSignatureDictionary.Algorithm, null); writer.WriteString(dictionaryManager.SecurityAlgorithmDictionary.ExclusiveC14n); writer.WriteEndAttribute(); writer.WriteEndElement(); // Transform writer.WriteEndElement(); // Transforms writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.DigestMethod, ns); writer.WriteStartAttribute(dictionaryManager.XmlSignatureDictionary.Algorithm, null); if (this.digestMethodDictionaryString != null) { writer.WriteString(this.digestMethodDictionaryString); } else { writer.WriteString(this.digestMethod); } writer.WriteEndAttribute(); writer.WriteEndElement(); // DigestMethod byte[] digest = this.references[i].digest; writer.WriteStartElement(prefix, dictionaryManager.XmlSignatureDictionary.DigestValue, ns); writer.WriteBase64(digest, 0, digest.Length); writer.WriteEndElement(); // DigestValue writer.WriteEndElement(); // Reference } writer.WriteEndElement(); // SignedInfo } struct ReferenceEntry { internal string id; internal byte[] digest; public void Set(string id, byte[] digest) { this.id = id; this.digest = digest; } } sealed class SignedInfoCanonicalFormWriter : CanonicalFormWriter { const string xml1 = ""; readonly byte[] fragment1; readonly byte[] fragment2; readonly byte[] fragment3; readonly byte[] fragment4; readonly byte[] fragment5; readonly byte[] fragment6; readonly byte[] fragment7; readonly byte[] sha1Digest; readonly byte[] sha256Digest; readonly byte[] hmacSha1Signature; readonly byte[] rsaSha1Signature; static readonly SignedInfoCanonicalFormWriter instance = new SignedInfoCanonicalFormWriter(); SignedInfoCanonicalFormWriter() { UTF8Encoding encoding = CanonicalFormWriter.Utf8WithoutPreamble; this.fragment1 = encoding.GetBytes(xml1); this.fragment2 = encoding.GetBytes(xml2); this.fragment3 = encoding.GetBytes(xml3); this.fragment4 = encoding.GetBytes(xml4); this.fragment5 = encoding.GetBytes(xml5); this.fragment6 = encoding.GetBytes(xml6); this.fragment7 = encoding.GetBytes(xml7); this.sha1Digest = encoding.GetBytes(SecurityAlgorithms.Sha1Digest); this.sha256Digest = encoding.GetBytes(SecurityAlgorithms.Sha256Digest); this.hmacSha1Signature = encoding.GetBytes(SecurityAlgorithms.HmacSha1Signature); this.rsaSha1Signature = encoding.GetBytes(SecurityAlgorithms.RsaSha1Signature); } public static SignedInfoCanonicalFormWriter Instance { get { return instance; } } byte[] EncodeDigestAlgorithm(string algorithm) { if (algorithm == SecurityAlgorithms.Sha1Digest) { return this.sha1Digest; } else if (algorithm == SecurityAlgorithms.Sha256Digest) { return this.sha256Digest; } else { return CanonicalFormWriter.Utf8WithoutPreamble.GetBytes(algorithm); } } byte[] EncodeSignatureAlgorithm(string algorithm) { if (algorithm == SecurityAlgorithms.HmacSha1Signature) { return this.hmacSha1Signature; } else if (algorithm == SecurityAlgorithms.RsaSha1Signature) { return this.rsaSha1Signature; } else { return CanonicalFormWriter.Utf8WithoutPreamble.GetBytes(algorithm); } } public void WriteSignedInfoCanonicalForm( Stream stream, string signatureMethod, string digestMethod, ReferenceEntry[] references, int referenceCount, byte[] workBuffer, char[] base64WorkBuffer) { DiagnosticUtility.DebugAssert(XmlSignatureStrings.Prefix.Length == 0, "Update SignedInfoCanonicalFormWriter to match new XmlDSig prefix"); stream.Write(this.fragment1, 0, this.fragment1.Length); byte[] signatureMethodBytes = EncodeSignatureAlgorithm(signatureMethod); stream.Write(signatureMethodBytes, 0, signatureMethodBytes.Length); stream.Write(this.fragment2, 0, this.fragment2.Length); byte[] digestMethodBytes = EncodeDigestAlgorithm(digestMethod); for (int i = 0; i < referenceCount; i++) { stream.Write(this.fragment3, 0, this.fragment3.Length); EncodeAndWrite(stream, workBuffer, references[i].id); stream.Write(this.fragment4, 0, this.fragment4.Length); stream.Write(digestMethodBytes, 0, digestMethodBytes.Length); stream.Write(this.fragment5, 0, this.fragment5.Length); Base64EncodeAndWrite(stream, workBuffer, base64WorkBuffer, references[i].digest); stream.Write(this.fragment6, 0, this.fragment6.Length); } stream.Write(this.fragment7, 0, this.fragment7.Length); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. "; const string xml3 = " "; const string xml7 = " "; const string xml6 = "
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