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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel
{
using System;
using System.Xml;
internal class CipherDataElement
{
byte[] _iv;
byte[] _cipherText;
public byte[] CipherValue
{
get
{
if ( _iv != null )
{
byte[] buffer = new byte[_iv.Length + _cipherText.Length];
Buffer.BlockCopy( _iv, 0, buffer, 0, _iv.Length );
Buffer.BlockCopy( _cipherText, 0, buffer, _iv.Length, _cipherText.Length );
_iv = null;
}
return _cipherText;
}
set
{
_cipherText = value;
}
}
public void ReadXml( XmlDictionaryReader reader )
{
if ( reader == null )
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "reader" );
}
reader.MoveToContent();
if ( !reader.IsStartElement( XmlEncryptionConstants.Elements.CipherData, XmlEncryptionConstants.Namespace ) )
{
throw DiagnosticUtility.ThrowHelperXml( reader, SR.GetString( SR.ID4188 ) );
}
reader.ReadStartElement( XmlEncryptionConstants.Elements.CipherData, XmlEncryptionConstants.Namespace );
reader.ReadStartElement( XmlEncryptionConstants.Elements.CipherValue, XmlEncryptionConstants.Namespace );
_cipherText = reader.ReadContentAsBase64();
_iv = null;
// <CipherValue>
reader.MoveToContent();
reader.ReadEndElement();
// <CipherData>
reader.MoveToContent();
reader.ReadEndElement();
}
public void SetCipherValueFragments( byte[] iv, byte[] cipherText )
{
_iv = iv;
_cipherText = cipherText;
}
public void WriteXml( XmlWriter writer )
{
writer.WriteStartElement( XmlEncryptionConstants.Prefix, XmlEncryptionConstants.Elements.CipherData, XmlEncryptionConstants.Namespace );
writer.WriteStartElement( XmlEncryptionConstants.Prefix, XmlEncryptionConstants.Elements.CipherValue, XmlEncryptionConstants.Namespace );
if ( _iv != null )
writer.WriteBase64( _iv, 0, _iv.Length );
writer.WriteBase64( _cipherText, 0, _cipherText.Length );
writer.WriteEndElement(); // CipherValue
writer.WriteEndElement(); // CipherData
}
}
}
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