Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / Diagnostics / DigestTraceRecordHelper.cs / 1 / DigestTraceRecordHelper.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.IdentityModel.Diagnostics { using System; using System.Diagnostics; using System.IO; using System.Globalization; using System.Security.Cryptography; using System.Text; using System.Xml; using System.ServiceModel.Diagnostics; internal class DigestTraceRecord : TraceRecord { MemoryStream _logStream; HashAlgorithm _hash; string _traceName; const string Empty = "Empty"; const string CanonicalElementString = "CanonicalElementString"; const string CanonicalElementStringLength = "CanonicalElementStringLength"; const string CanonicalOctets = "CanonicalOctets"; const string CanonicalOctetsLength = "CanonicalOctetsLength"; const string CanonicalOctetsHash = "CanonicalOctetsHash"; const string CanonicalOctetsHashLength = "CanonicalOctetsHashLength"; const string Key = "Key"; const string Length = "Length"; const string FirstByte = "FirstByte"; const string LastByte = "LastByte"; internal DigestTraceRecord(string traceName, MemoryStream logStream, HashAlgorithm hash) { if (String.IsNullOrEmpty(traceName)) _traceName = Empty; else _traceName = traceName; _logStream = logStream; _hash = hash; } internal override string EventId { get { return TraceRecord.EventIdBase + _traceName + TraceRecord.NamespaceSuffix; } } internal override void WriteTo(XmlWriter writer) { base.WriteTo(writer); // // canonical element string // byte[] contentBuffer = _logStream.GetBuffer(); string contentAsString = System.Text.Encoding.UTF8.GetString(contentBuffer, 0, (int)_logStream.Length); writer.WriteElementString(CanonicalElementStringLength, contentAsString.Length.ToString(CultureInfo.InvariantCulture)); writer.WriteComment(CanonicalElementString + ":" + contentAsString); // // canonical element base64 format // writer.WriteElementString(CanonicalOctetsLength, contentBuffer.Length.ToString(CultureInfo.InvariantCulture)); writer.WriteElementString(CanonicalOctets, Convert.ToBase64String(contentBuffer)); // // Hash // writer.WriteElementString(CanonicalOctetsHashLength, _hash.Hash.Length.ToString(CultureInfo.InvariantCulture)); writer.WriteElementString(CanonicalOctetsHash, Convert.ToBase64String(_hash.Hash)); // // Key: this will only be printed out for the symmetric key case // if (_hash is KeyedHashAlgorithm) { KeyedHashAlgorithm keyedHash = _hash as KeyedHashAlgorithm; byte[] key = keyedHash.Key; writer.WriteStartElement(Key); // start the key element writer.WriteElementString(Length, key.Length.ToString(CultureInfo.InvariantCulture)); // key length writer.WriteElementString(FirstByte, key[0].ToString(CultureInfo.InvariantCulture)); // first byte of the key writer.WriteElementString(LastByte, key[key.Length - 1].ToString(CultureInfo.InvariantCulture)); // last byte of the key writer.WriteEndElement(); // close the key element } } } internal static class DigestTraceRecordHelper { const string DigestTrace = "DigestTrace"; static bool _shouldTraceDigest = false; static bool _initialized = false; internal static bool ShouldTraceDigest { get { if (!_initialized) InitializeShouldTraceDigest(); return _shouldTraceDigest; } } static void InitializeShouldTraceDigest() { // // Log the digest only if // 1.Users ask for verbose AND // 2.Users are fine with logging Pii ( private identity information ) - todo // if (DiagnosticUtility.DiagnosticTrace != null && DiagnosticUtility.DiagnosticTrace.TraceSource != null && DiagnosticUtility.DiagnosticTrace.TraceSource.ShouldLogPii && DiagnosticUtility.ShouldTraceVerbose) { _shouldTraceDigest = true; } _initialized = true; } internal static void TraceDigest(MemoryStream logStream, HashAlgorithm hash) { if (DigestTraceRecordHelper.ShouldTraceDigest) { TraceUtility.TraceEvent(TraceEventType.Verbose, TraceCode.IdentityModel, new DigestTraceRecord(DigestTrace, logStream, hash), null, null); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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