155 lines
6.4 KiB
C#
155 lines
6.4 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel
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{
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using System.Collections.Generic;
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using System.IdentityModel.Diagnostics;
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using System.IdentityModel.Selectors;
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using System.IdentityModel.Tokens;
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using System.Xml;
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/// <summary>
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/// This class implements a deserialization for: EncryptedType as defined in section 3.5.1 of http://www.w3.org/TR/2002/REC-xmlenc-core-2002120
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/// </summary>
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internal class EncryptedKeyElement : EncryptedTypeElement
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{
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string _carriedName;
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string _recipient;
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List<string> _keyReferences;
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List<string> _dataReferences;
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public EncryptedKeyElement( SecurityTokenSerializer keyInfoSerializer )
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: base( keyInfoSerializer )
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{
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_keyReferences = new List<string>();
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_dataReferences = new List<string>();
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}
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public string CarriedName
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{
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get { return _carriedName; }
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}
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public IList<string> DataReferences
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{
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get { return _dataReferences; }
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}
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public IList<string> KeyReferences
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{
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get { return _keyReferences; }
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}
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public override void ReadExtensions( XmlDictionaryReader reader )
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{
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reader.MoveToContent();
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if ( reader.IsStartElement( XmlEncryptionConstants.Elements.ReferenceList, XmlEncryptionConstants.Namespace ) )
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{
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reader.ReadStartElement();
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// could have data or key references. these are the only two possible elements sec 3.6 xml enc.
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// 3.6 The ReferenceList Element specifies there is a choice. Once one is chosen, it is fixed.
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if ( reader.IsStartElement( XmlEncryptionConstants.Elements.DataReference, XmlEncryptionConstants.Namespace ) )
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{
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while ( reader.IsStartElement() )
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{
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if ( reader.IsStartElement( XmlEncryptionConstants.Elements.DataReference, XmlEncryptionConstants.Namespace ) )
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{
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string dataRef = reader.GetAttribute( XmlEncryptionConstants.Attributes.Uri );
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if ( !string.IsNullOrEmpty( dataRef ) )
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{
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_dataReferences.Add( dataRef );
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}
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reader.Skip();
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}
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else if ( reader.IsStartElement( XmlEncryptionConstants.Elements.KeyReference, XmlEncryptionConstants.Namespace ) )
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{
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throw DiagnosticUtility.ThrowHelperXml( reader, SR.GetString( SR.ID4189 ) );
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}
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else
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{
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string xml = reader.ReadOuterXml();
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if ( DiagnosticUtility.ShouldTraceWarning )
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{
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TraceUtility.TraceString( System.Diagnostics.TraceEventType.Warning, SR.GetString( SR.ID8024, reader.Name, reader.NamespaceURI, xml ) );
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}
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}
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}
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}
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else if ( reader.IsStartElement( XmlEncryptionConstants.Elements.KeyReference, XmlEncryptionConstants.Namespace ) )
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{
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while ( reader.IsStartElement() )
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{
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if ( reader.IsStartElement( XmlEncryptionConstants.Elements.KeyReference, XmlEncryptionConstants.Namespace ) )
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{
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string keyRef = reader.GetAttribute( XmlEncryptionConstants.Attributes.Uri );
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if ( !string.IsNullOrEmpty( keyRef ) )
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{
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_keyReferences.Add( keyRef );
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}
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reader.Skip();
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}
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else if ( reader.IsStartElement( XmlEncryptionConstants.Elements.DataReference, XmlEncryptionConstants.Namespace ) )
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{
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throw DiagnosticUtility.ThrowHelperXml( reader, SR.GetString( SR.ID4190 ) );
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}
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else
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{
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string xml = reader.ReadOuterXml();
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if ( DiagnosticUtility.ShouldTraceWarning )
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{
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TraceUtility.TraceString( System.Diagnostics.TraceEventType.Warning, SR.GetString( SR.ID8024, reader.Name, reader.NamespaceURI, xml ) );
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}
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}
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}
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}
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else
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{
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// there must be at least one reference.
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throw DiagnosticUtility.ThrowHelperXml( reader, SR.GetString( SR.ID4191 ) );
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}
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reader.MoveToContent();
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if ( reader.IsStartElement( XmlEncryptionConstants.Elements.CarriedKeyName, XmlEncryptionConstants.Namespace ) )
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{
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reader.ReadStartElement();
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_carriedName = reader.ReadString();
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reader.ReadEndElement();
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}
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// </ReferenceList>
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reader.ReadEndElement();
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}
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}
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public override void ReadXml( XmlDictionaryReader reader )
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{
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if ( reader == null )
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "reader" );
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}
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reader.MoveToContent();
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if ( !reader.IsStartElement( XmlEncryptionConstants.Elements.EncryptedKey, XmlEncryptionConstants.Namespace ) )
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{
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throw DiagnosticUtility.ThrowHelperXml( reader, SR.GetString( SR.ID4187 ) );
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}
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_recipient = reader.GetAttribute( XmlEncryptionConstants.Attributes.Recipient, null );
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//<EncryptedKey> extends <EncryptedType>
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// base will read the start element and end elements
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base.ReadXml( reader );
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}
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public EncryptedKeyIdentifierClause GetClause()
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{
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return new EncryptedKeyIdentifierClause( CipherData.CipherValue, Algorithm, KeyIdentifier );
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}
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}
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}
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