Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/IdentityModel/KeyInfo.cs

@@ -0,0 +1,91 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.IdentityModel
+{
+    using System.IdentityModel.Diagnostics;
+    using System.IdentityModel.Selectors;
+    using System.IdentityModel.Tokens;
+    using System.Xml;
+
+    internal class KeyInfo
+    {
+        SecurityTokenSerializer _keyInfoSerializer;
+        SecurityKeyIdentifier _ski;
+        string _retrieval;
+
+        public KeyInfo( SecurityTokenSerializer keyInfoSerializer )
+        {
+            _keyInfoSerializer = keyInfoSerializer;
+            _ski = new SecurityKeyIdentifier();
+        }
+
+        public string RetrievalMethod
+        {
+            get { return _retrieval; }
+        }
+
+        public SecurityKeyIdentifier KeyIdentifier
+        {
+            get { return _ski; }
+            set
+            {
+                if ( value == null )
+                {
+                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "value" );
+                }
+
+                _ski = value;
+            }
+        }
+
+        public virtual void ReadXml( XmlDictionaryReader reader )
+        {
+            if ( reader == null )
+            {
+                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "reader" );
+            }
+
+            reader.MoveToContent();
+            if ( reader.IsStartElement( XD.XmlSignatureDictionary.KeyInfo.Value, XD.XmlSignatureDictionary.Namespace.Value ) )
+            {
+                // <KeyInfo>
+                reader.ReadStartElement();
+
+                while ( reader.IsStartElement() )
+                {
+                    // <RetrievalMethod>
+                    if ( reader.IsStartElement( XmlSignatureConstants.Elements.RetrievalMethod, XD.XmlSignatureDictionary.Namespace.Value ) )
+                    {
+                        string method = reader.GetAttribute( XD.XmlSignatureDictionary.URI.Value );
+                        if ( !string.IsNullOrEmpty( method ) )
+                        {
+                            _retrieval = method;
+                        }
+                        reader.Skip();
+                    }
+                    // check if internal serializer can handle clause
+                    else if ( _keyInfoSerializer.CanReadKeyIdentifierClause( reader ) )
+                    {
+                        _ski.Add( _keyInfoSerializer.ReadKeyIdentifierClause( reader ) );
+                    }
+                    // trace we skipped over an element
+                    else if ( reader.IsStartElement() )
+                    {
+                        string xml = reader.ReadOuterXml();
+
+                        if ( DiagnosticUtility.ShouldTraceWarning )
+                        {
+                            TraceUtility.TraceString( System.Diagnostics.TraceEventType.Warning, SR.GetString( SR.ID8023, reader.Name, reader.NamespaceURI, xml ) );
+                        }
+                    }
+                    reader.MoveToContent();
+                }
+
+                reader.MoveToContent();
+                reader.ReadEndElement();
+            }
+        }
+    }
+}