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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.Collections.Generic;
using System.ServiceModel;
using System.IO;
using System.IdentityModel.Claims;
using System.IdentityModel.Policy;
using System.ServiceModel.Security.Tokens;
using System.Threading;
using System.Globalization;
using System.ServiceModel.Diagnostics;
using System.Text;
using System.Xml;
using CanonicalFormWriter = System.IdentityModel.CanonicalFormWriter;
using SignatureResourcePool = System.IdentityModel.SignatureResourcePool;
using HashStream = System.IdentityModel.HashStream;
abstract class WSUtilitySpecificationVersion
{
internal static readonly string[] AcceptedDateTimeFormats = new string[]
{
"yyyy-MM-ddTHH:mm:ss.fffffffZ",
"yyyy-MM-ddTHH:mm:ss.ffffffZ",
"yyyy-MM-ddTHH:mm:ss.fffffZ",
"yyyy-MM-ddTHH:mm:ss.ffffZ",
"yyyy-MM-ddTHH:mm:ss.fffZ",
"yyyy-MM-ddTHH:mm:ss.ffZ",
"yyyy-MM-ddTHH:mm:ss.fZ",
"yyyy-MM-ddTHH:mm:ssZ"
};
readonly XmlDictionaryString namespaceUri;
internal WSUtilitySpecificationVersion(XmlDictionaryString namespaceUri)
{
this.namespaceUri = namespaceUri;
}
public static WSUtilitySpecificationVersion Default
{
get { return OneDotZero; }
}
internal XmlDictionaryString NamespaceUri
{
get { return this.namespaceUri; }
}
public static WSUtilitySpecificationVersion OneDotZero
{
get { return WSUtilitySpecificationVersionOneDotZero.Instance; }
}
internal abstract bool IsReaderAtTimestamp(XmlDictionaryReader reader);
internal abstract SecurityTimestamp ReadTimestamp(XmlDictionaryReader reader, string digestAlgorithm, SignatureResourcePool resourcePool);
internal abstract void WriteTimestamp(XmlDictionaryWriter writer, SecurityTimestamp timestamp);
internal abstract void WriteTimestampCanonicalForm(Stream stream, SecurityTimestamp timestamp, byte[] buffer);
sealed class WSUtilitySpecificationVersionOneDotZero : WSUtilitySpecificationVersion
{
static readonly WSUtilitySpecificationVersionOneDotZero instance = new WSUtilitySpecificationVersionOneDotZero();
WSUtilitySpecificationVersionOneDotZero()
: base(XD.UtilityDictionary.Namespace)
{
}
public static WSUtilitySpecificationVersionOneDotZero Instance
{
get { return instance; }
}
internal override bool IsReaderAtTimestamp(XmlDictionaryReader reader)
{
return reader.IsStartElement(XD.UtilityDictionary.Timestamp, XD.UtilityDictionary.Namespace);
}
internal override SecurityTimestamp ReadTimestamp(XmlDictionaryReader reader, string digestAlgorithm, SignatureResourcePool resourcePool)
{
bool canonicalize = digestAlgorithm != null && reader.CanCanonicalize;
HashStream hashStream = null;
reader.MoveToStartElement(XD.UtilityDictionary.Timestamp, XD.UtilityDictionary.Namespace);
if (canonicalize)
{
hashStream = resourcePool.TakeHashStream(digestAlgorithm);
reader.StartCanonicalization(hashStream, false, null);
}
string id = reader.GetAttribute(XD.UtilityDictionary.IdAttribute, XD.UtilityDictionary.Namespace);
reader.ReadStartElement();
reader.ReadStartElement(XD.UtilityDictionary.CreatedElement, XD.UtilityDictionary.Namespace);
DateTime creationTimeUtc = reader.ReadContentAsDateTime().ToUniversalTime();
reader.ReadEndElement();
DateTime expiryTimeUtc;
if (reader.IsStartElement(XD.UtilityDictionary.ExpiresElement, XD.UtilityDictionary.Namespace))
{
reader.ReadStartElement();
expiryTimeUtc = reader.ReadContentAsDateTime().ToUniversalTime();
reader.ReadEndElement();
}
else
{
expiryTimeUtc = SecurityUtils.MaxUtcDateTime;
}
reader.ReadEndElement();
byte[] digest;
if (canonicalize)
{
reader.EndCanonicalization();
digest = hashStream.FlushHashAndGetValue();
}
else
{
digest = null;
}
return new SecurityTimestamp(creationTimeUtc, expiryTimeUtc, id, digestAlgorithm, digest);
}
internal override void WriteTimestamp(XmlDictionaryWriter writer, SecurityTimestamp timestamp)
{
writer.WriteStartElement(XD.UtilityDictionary.Prefix.Value, XD.UtilityDictionary.Timestamp, XD.UtilityDictionary.Namespace);
writer.WriteAttributeString(XD.UtilityDictionary.IdAttribute, XD.UtilityDictionary.Namespace, timestamp.Id);
writer.WriteStartElement(XD.UtilityDictionary.CreatedElement, XD.UtilityDictionary.Namespace);
char[] creationTime = timestamp.GetCreationTimeChars();
writer.WriteChars(creationTime, 0, creationTime.Length);
writer.WriteEndElement(); // wsu:Created
writer.WriteStartElement(XD.UtilityDictionary.ExpiresElement, XD.UtilityDictionary.Namespace);
char[] expiryTime = timestamp.GetExpiryTimeChars();
writer.WriteChars(expiryTime, 0, expiryTime.Length);
writer.WriteEndElement(); // wsu:Expires
writer.WriteEndElement();
}
internal override void WriteTimestampCanonicalForm(Stream stream, SecurityTimestamp timestamp, byte[] workBuffer)
{
TimestampCanonicalFormWriter.Instance.WriteCanonicalForm(
stream,
timestamp.Id, timestamp.GetCreationTimeChars(), timestamp.GetExpiryTimeChars(),
workBuffer);
}
}
sealed class TimestampCanonicalFormWriter : CanonicalFormWriter
{
const string timestamp = UtilityStrings.Prefix + ":" + UtilityStrings.Timestamp;
const string created = UtilityStrings.Prefix + ":" + UtilityStrings.CreatedElement;
const string expires = UtilityStrings.Prefix + ":" + UtilityStrings.ExpiresElement;
const string idAttribute = UtilityStrings.Prefix + ":" + UtilityStrings.IdAttribute;
const string ns = "xmlns:" + UtilityStrings.Prefix + "=\"" + UtilityStrings.Namespace + "\"";
const string xml1 = "<" + timestamp + " " + ns + " " + idAttribute + "=\"";
const string xml2 = "\"><" + created + ">";
const string xml3 = "</" + created + "><" + expires + ">";
const string xml4 = "</" + expires + "></" + timestamp + ">";
readonly byte[] fragment1;
readonly byte[] fragment2;
readonly byte[] fragment3;
readonly byte[] fragment4;
static readonly TimestampCanonicalFormWriter instance = new TimestampCanonicalFormWriter();
TimestampCanonicalFormWriter()
{
UTF8Encoding encoding = CanonicalFormWriter.Utf8WithoutPreamble;
this.fragment1 = encoding.GetBytes(xml1);
this.fragment2 = encoding.GetBytes(xml2);
this.fragment3 = encoding.GetBytes(xml3);
this.fragment4 = encoding.GetBytes(xml4);
}
public static TimestampCanonicalFormWriter Instance
{
get { return instance; }
}
public void WriteCanonicalForm(Stream stream, string id, char[] created, char[] expires, byte[] workBuffer)
{
stream.Write(this.fragment1, 0, this.fragment1.Length);
EncodeAndWrite(stream, workBuffer, id);
stream.Write(this.fragment2, 0, this.fragment2.Length);
EncodeAndWrite(stream, workBuffer, created);
stream.Write(this.fragment3, 0, this.fragment3.Length);
EncodeAndWrite(stream, workBuffer, expires);
stream.Write(this.fragment4, 0, this.fragment4.Length);
}
}
}
}
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