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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel.Tokens
{
using System.Collections.Generic;
using System.IdentityModel.Selectors;
using System.Xml;
using KeyIdentifierClauseEntry = System.IdentityModel.Selectors.SecurityTokenSerializer.KeyIdentifierClauseEntry;
class XmlEncApr2001 : SecurityTokenSerializer.SerializerEntries
{
KeyInfoSerializer securityTokenSerializer;
public XmlEncApr2001(KeyInfoSerializer securityTokenSerializer)
{
this.securityTokenSerializer = securityTokenSerializer;
}
public override void PopulateKeyIdentifierClauseEntries(IList<KeyIdentifierClauseEntry> keyIdentifierClauseEntries)
{
keyIdentifierClauseEntries.Add(new EncryptedKeyClauseEntry(this.securityTokenSerializer));
}
internal class EncryptedKeyClauseEntry : SecurityTokenSerializer.KeyIdentifierClauseEntry
{
KeyInfoSerializer securityTokenSerializer;
public EncryptedKeyClauseEntry(KeyInfoSerializer securityTokenSerializer)
{
this.securityTokenSerializer = securityTokenSerializer;
}
protected override XmlDictionaryString LocalName
{
get
{
return XD.XmlEncryptionDictionary.EncryptedKey;
}
}
protected override XmlDictionaryString NamespaceUri
{
get
{
return XD.XmlEncryptionDictionary.Namespace;
}
}
public override SecurityKeyIdentifierClause ReadKeyIdentifierClauseCore(XmlDictionaryReader reader)
{
string encryptionMethod = null;
string carriedKeyName = null;
SecurityKeyIdentifier encryptingKeyIdentifier = null;
byte[] encryptedKey = null;
reader.ReadStartElement(XD.XmlEncryptionDictionary.EncryptedKey, NamespaceUri);
if (reader.IsStartElement(XD.XmlEncryptionDictionary.EncryptionMethod, NamespaceUri))
{
encryptionMethod = reader.GetAttribute(XD.XmlEncryptionDictionary.AlgorithmAttribute, null);
bool isEmptyElement = reader.IsEmptyElement;
reader.ReadStartElement();
if (!isEmptyElement)
{
while (reader.IsStartElement())
{
reader.Skip();
}
reader.ReadEndElement();
}
}
if (this.securityTokenSerializer.CanReadKeyIdentifier(reader))
{
encryptingKeyIdentifier = this.securityTokenSerializer.ReadKeyIdentifier(reader);
}
reader.ReadStartElement(XD.XmlEncryptionDictionary.CipherData, NamespaceUri);
reader.ReadStartElement(XD.XmlEncryptionDictionary.CipherValue, NamespaceUri);
encryptedKey = reader.ReadContentAsBase64();
reader.ReadEndElement();
reader.ReadEndElement();
if (reader.IsStartElement(XD.XmlEncryptionDictionary.CarriedKeyName, NamespaceUri))
{
reader.ReadStartElement();
carriedKeyName = reader.ReadString();
reader.ReadEndElement();
}
reader.ReadEndElement();
return new EncryptedKeyIdentifierClause(encryptedKey, encryptionMethod, encryptingKeyIdentifier, carriedKeyName);
}
public override bool SupportsCore(SecurityKeyIdentifierClause keyIdentifierClause)
{
return keyIdentifierClause is EncryptedKeyIdentifierClause;
}
public override void WriteKeyIdentifierClauseCore(XmlDictionaryWriter writer, SecurityKeyIdentifierClause keyIdentifierClause)
{
EncryptedKeyIdentifierClause encryptedKeyClause = keyIdentifierClause as EncryptedKeyIdentifierClause;
writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.EncryptedKey, NamespaceUri);
if (encryptedKeyClause.EncryptionMethod != null)
{
writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.EncryptionMethod, NamespaceUri);
writer.WriteAttributeString(XD.XmlEncryptionDictionary.AlgorithmAttribute, null, encryptedKeyClause.EncryptionMethod);
if (encryptedKeyClause.EncryptionMethod == XD.SecurityAlgorithmDictionary.RsaOaepKeyWrap.Value)
{
writer.WriteStartElement(XmlSignatureStrings.Prefix, XD.XmlSignatureDictionary.DigestMethod, XD.XmlSignatureDictionary.Namespace);
writer.WriteAttributeString(XD.XmlSignatureDictionary.Algorithm, null, SecurityAlgorithms.Sha1Digest);
writer.WriteEndElement();
}
writer.WriteEndElement();
}
if (encryptedKeyClause.EncryptingKeyIdentifier != null)
{
this.securityTokenSerializer.WriteKeyIdentifier(writer, encryptedKeyClause.EncryptingKeyIdentifier);
}
writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CipherData, NamespaceUri);
writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CipherValue, NamespaceUri);
byte[] encryptedKey = encryptedKeyClause.GetEncryptedKey();
writer.WriteBase64(encryptedKey, 0, encryptedKey.Length);
writer.WriteEndElement();
writer.WriteEndElement();
if (encryptedKeyClause.CarriedKeyName != null)
{
writer.WriteElementString(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CarriedKeyName, NamespaceUri, encryptedKeyClause.CarriedKeyName);
}
writer.WriteEndElement();
}
}
}
}
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