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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.IdentityModel;
using System.Runtime.CompilerServices;
using System.Xml;
[TypeForwardedFrom("System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
sealed class EncryptedKey : EncryptedType
{
internal static readonly XmlDictionaryString CarriedKeyElementName = XD.XmlEncryptionDictionary.CarriedKeyName;
internal static readonly XmlDictionaryString ElementName = XD.XmlEncryptionDictionary.EncryptedKey;
internal static readonly XmlDictionaryString RecipientAttribute = XD.XmlEncryptionDictionary.Recipient;
string carriedKeyName;
string recipient;
ReferenceList referenceList;
byte[] wrappedKey;
public string CarriedKeyName
{
get { return this.carriedKeyName; }
set { this.carriedKeyName = value; }
}
public string Recipient
{
get { return this.recipient; }
set { this.recipient = value; }
}
public ReferenceList ReferenceList
{
get { return this.referenceList; }
set { this.referenceList = value; }
}
protected override XmlDictionaryString OpeningElementName
{
get { return ElementName; }
}
protected override void ForceEncryption()
{
// no work to be done here since, unlike bulk encryption, key wrapping is done eagerly
}
public byte[] GetWrappedKey()
{
if (this.State == EncryptionState.New)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.BadEncryptionState)));
}
return this.wrappedKey;
}
public void SetUpKeyWrap(byte[] wrappedKey)
{
if (this.State != EncryptionState.New)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.BadEncryptionState)));
}
if (wrappedKey == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("wrappedKey");
}
this.wrappedKey = wrappedKey;
this.State = EncryptionState.Encrypted;
}
protected override void ReadAdditionalAttributes(XmlDictionaryReader reader)
{
this.recipient = reader.GetAttribute(RecipientAttribute, null);
}
protected override void ReadAdditionalElements(XmlDictionaryReader reader)
{
if (reader.IsStartElement(ReferenceList.ElementName, EncryptedType.NamespaceUri))
{
this.referenceList = new ReferenceList();
this.referenceList.ReadFrom(reader);
}
if (reader.IsStartElement(CarriedKeyElementName, EncryptedType.NamespaceUri))
{
reader.ReadStartElement(CarriedKeyElementName, EncryptedType.NamespaceUri);
this.carriedKeyName = reader.ReadString();
reader.ReadEndElement();
}
}
protected override void ReadCipherData(XmlDictionaryReader reader)
{
this.wrappedKey = reader.ReadContentAsBase64();
}
protected override void ReadCipherData(XmlDictionaryReader reader, long maxBufferSize)
{
this.wrappedKey = SecurityUtils.ReadContentAsBase64(reader, maxBufferSize);
}
protected override void WriteAdditionalAttributes(XmlDictionaryWriter writer, DictionaryManager dictionaryManager)
{
if (this.recipient != null)
{
writer.WriteAttributeString(RecipientAttribute, null, this.recipient);
}
}
protected override void WriteAdditionalElements(XmlDictionaryWriter writer, DictionaryManager dictionaryManager)
{
if (this.carriedKeyName != null)
{
writer.WriteStartElement(CarriedKeyElementName, EncryptedType.NamespaceUri);
writer.WriteString(this.carriedKeyName);
writer.WriteEndElement(); // CarriedKeyName
}
if (this.referenceList != null)
{
this.referenceList.WriteTo(writer, dictionaryManager);
}
}
protected override void WriteCipherData(XmlDictionaryWriter writer)
{
writer.WriteBase64(this.wrappedKey, 0, this.wrappedKey.Length);
}
}
}
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