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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.IdentityModel.Tokens
{
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.IdentityModel;
using System.IdentityModel.Claims;
using System.IdentityModel.Selectors;
using System.Runtime.Serialization;
using System.Xml.Serialization;
using System.Xml;
public class SamlAttributeStatement : SamlSubjectStatement
{
readonly ImmutableCollection<SamlAttribute> attributes = new ImmutableCollection<SamlAttribute>();
bool isReadOnly = false;
public SamlAttributeStatement()
{
}
public SamlAttributeStatement(SamlSubject samlSubject, IEnumerable<SamlAttribute> attributes)
: base(samlSubject)
{
if (attributes == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("attributes"));
foreach (SamlAttribute attribute in attributes)
{
if (attribute == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.SAMLEntityCannotBeNullOrEmpty, XD.SamlDictionary.Attribute.Value));
this.attributes.Add(attribute);
}
CheckObjectValidity();
}
public IList<SamlAttribute> Attributes
{
get { return this.attributes; }
}
public override bool IsReadOnly
{
get { return this.isReadOnly; }
}
public override void MakeReadOnly()
{
if (!this.isReadOnly)
{
foreach (SamlAttribute attribute in attributes)
{
attribute.MakeReadOnly();
}
this.attributes.MakeReadOnly();
this.isReadOnly = true;
}
}
void CheckObjectValidity()
{
if (this.SamlSubject == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SAMLSubjectStatementRequiresSubject)));
if (this.attributes.Count == 0)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SAMLAttributeShouldHaveOneValue)));
}
public override void ReadXml(XmlDictionaryReader reader, SamlSerializer samlSerializer, SecurityTokenSerializer keyInfoSerializer, SecurityTokenResolver outOfBandTokenResolver)
{
if (reader == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("reader"));
if (samlSerializer == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("samlSerializer"));
#pragma warning suppress 56506 // samlSerializer.DictionaryManager is never null.
SamlDictionary dictionary = samlSerializer.DictionaryManager.SamlDictionary;
reader.MoveToContent();
reader.Read();
if (reader.IsStartElement(dictionary.Subject, dictionary.Namespace))
{
SamlSubject subject = new SamlSubject();
subject.ReadXml(reader, samlSerializer, keyInfoSerializer, outOfBandTokenResolver);
base.SamlSubject = subject;
}
else
{
// SAML Subject is a required Attribute Statement clause.
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SAMLAttributeStatementMissingSubjectOnRead)));
}
while (reader.IsStartElement())
{
if (reader.IsStartElement(dictionary.Attribute, dictionary.Namespace))
{
// SAML Attribute is a extensibility point. So ask the SAML serializer
// to load this part.
SamlAttribute attribute = samlSerializer.LoadAttribute(reader, keyInfoSerializer, outOfBandTokenResolver);
if (attribute == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SAMLUnableToLoadAttribute)));
this.attributes.Add(attribute);
}
else
{
break;
}
}
if (this.attributes.Count == 0)
{
// Each Attribute statement should have at least one attribute.
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SAMLAttributeStatementMissingAttributeOnRead)));
}
reader.MoveToContent();
reader.ReadEndElement();
}
public override void WriteXml(XmlDictionaryWriter writer, SamlSerializer samlSerializer, SecurityTokenSerializer keyInfoSerializer)
{
CheckObjectValidity();
if (writer == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("writer"));
if (samlSerializer == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("samlSerializer"));
#pragma warning suppress 56506 // samlSerializer.DictionaryManager is never null.
SamlDictionary dictionary = samlSerializer.DictionaryManager.SamlDictionary;
writer.WriteStartElement(dictionary.PreferredPrefix.Value, dictionary.AttributeStatement, dictionary.Namespace);
this.SamlSubject.WriteXml(writer, samlSerializer, keyInfoSerializer);
for (int i = 0; i < this.attributes.Count; i++)
{
this.attributes[i].WriteXml(writer, samlSerializer, keyInfoSerializer);
}
writer.WriteEndElement();
}
protected override void AddClaimsToList(IList<Claim> claims)
{
if (claims == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("claims");
for (int i = 0; i < attributes.Count; i++)
{
if (attributes[i] != null)
{
ReadOnlyCollection<Claim> attributeClaims = attributes[i].ExtractClaims();
if (attributeClaims != null)
{
for (int j = 0; j < attributeClaims.Count; ++j)
if (attributeClaims[j] != null)
claims.Add(attributeClaims[j]);
}
}
}
}
}
}
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