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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel.Selectors
{
using System.Collections.Generic;
using System.IdentityModel.Tokens;
using System.Xml;
/// <summary>
/// SecurityTokenSerializer is responsible for writing and reading SecurityKeyIdentifiers, SecurityKeyIdentifierClauses and SecurityTokens.
/// In order to read SecurityTokens the SecurityTokenSerializer may need to resolve token references using the SecurityTokenResolvers that get passed in.
/// The SecurityTokenSerializer is stateless
/// Exceptions: XmlException, SecurityTokenException, NotSupportedException, InvalidOperationException, ArgumentException
/// </summary>
public abstract class SecurityTokenSerializer
{
// public methods
public bool CanReadToken(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return CanReadTokenCore(reader);
}
public bool CanWriteToken(SecurityToken token)
{
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
return CanWriteTokenCore(token);
}
public bool CanReadKeyIdentifier(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return CanReadKeyIdentifierCore(reader);
}
public bool CanWriteKeyIdentifier(SecurityKeyIdentifier keyIdentifier)
{
if (keyIdentifier == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("keyIdentifier");
}
return CanWriteKeyIdentifierCore(keyIdentifier);
}
public bool CanReadKeyIdentifierClause(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return CanReadKeyIdentifierClauseCore(reader);
}
public bool CanWriteKeyIdentifierClause(SecurityKeyIdentifierClause keyIdentifierClause)
{
if (keyIdentifierClause == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("keyIdentifierClause");
}
return CanWriteKeyIdentifierClauseCore(keyIdentifierClause);
}
public SecurityToken ReadToken(XmlReader reader, SecurityTokenResolver tokenResolver)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return ReadTokenCore(reader, tokenResolver);
}
public void WriteToken(XmlWriter writer, SecurityToken token)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
WriteTokenCore(writer, token);
}
public SecurityKeyIdentifier ReadKeyIdentifier(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return ReadKeyIdentifierCore(reader);
}
public void WriteKeyIdentifier(XmlWriter writer, SecurityKeyIdentifier keyIdentifier)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
if (keyIdentifier == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("keyIdentifier");
}
WriteKeyIdentifierCore(writer, keyIdentifier);
}
public SecurityKeyIdentifierClause ReadKeyIdentifierClause(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return ReadKeyIdentifierClauseCore(reader);
}
public void WriteKeyIdentifierClause(XmlWriter writer, SecurityKeyIdentifierClause keyIdentifierClause)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
if (keyIdentifierClause == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("keyIdentifierClause");
}
WriteKeyIdentifierClauseCore(writer, keyIdentifierClause);
}
// protected abstract methods
protected abstract bool CanReadTokenCore(XmlReader reader);
protected abstract bool CanWriteTokenCore(SecurityToken token);
protected abstract bool CanReadKeyIdentifierCore(XmlReader reader);
protected abstract bool CanWriteKeyIdentifierCore(SecurityKeyIdentifier keyIdentifier);
protected abstract bool CanReadKeyIdentifierClauseCore(XmlReader reader);
protected abstract bool CanWriteKeyIdentifierClauseCore(SecurityKeyIdentifierClause keyIdentifierClause);
protected abstract SecurityToken ReadTokenCore(XmlReader reader, SecurityTokenResolver tokenResolver);
protected abstract void WriteTokenCore(XmlWriter writer, SecurityToken token);
protected abstract SecurityKeyIdentifier ReadKeyIdentifierCore(XmlReader reader);
protected abstract void WriteKeyIdentifierCore(XmlWriter writer, SecurityKeyIdentifier keyIdentifier);
protected abstract SecurityKeyIdentifierClause ReadKeyIdentifierClauseCore(XmlReader reader);
protected abstract void WriteKeyIdentifierClauseCore(XmlWriter writer, SecurityKeyIdentifierClause keyIdentifierClause);
internal abstract class KeyIdentifierClauseEntry
{
protected abstract XmlDictionaryString LocalName { get; }
protected abstract XmlDictionaryString NamespaceUri { get; }
public virtual bool CanReadKeyIdentifierClauseCore(XmlDictionaryReader reader)
{
return reader.IsStartElement(this.LocalName, this.NamespaceUri);
}
public abstract SecurityKeyIdentifierClause ReadKeyIdentifierClauseCore(XmlDictionaryReader reader);
public abstract bool SupportsCore(SecurityKeyIdentifierClause keyIdentifierClause);
public abstract void WriteKeyIdentifierClauseCore(XmlDictionaryWriter writer, SecurityKeyIdentifierClause keyIdentifierClause);
}
internal abstract class StrEntry
{
public abstract string GetTokenTypeUri();
public abstract Type GetTokenType(SecurityKeyIdentifierClause clause);
public abstract bool CanReadClause(XmlDictionaryReader reader, string tokenType);
public abstract SecurityKeyIdentifierClause ReadClause(XmlDictionaryReader reader, byte[] derivationNonce, int derivationLength, string tokenType);
public abstract bool SupportsCore(SecurityKeyIdentifierClause clause);
public abstract void WriteContent(XmlDictionaryWriter writer, SecurityKeyIdentifierClause clause);
}
internal abstract class SerializerEntries
{
public virtual void PopulateTokenEntries(IList<TokenEntry> tokenEntries) { }
public virtual void PopulateKeyIdentifierEntries(IList<KeyIdentifierEntry> keyIdentifierEntries) { }
public virtual void PopulateKeyIdentifierClauseEntries(IList<KeyIdentifierClauseEntry> keyIdentifierClauseEntries) { }
public virtual void PopulateStrEntries(IList<StrEntry> strEntries) { }
}
internal abstract class KeyIdentifierEntry
{
protected abstract XmlDictionaryString LocalName { get; }
protected abstract XmlDictionaryString NamespaceUri { get; }
public virtual bool CanReadKeyIdentifierCore(XmlDictionaryReader reader)
{
return reader.IsStartElement(this.LocalName, this.NamespaceUri);
}
public abstract SecurityKeyIdentifier ReadKeyIdentifierCore(XmlDictionaryReader reader);
public abstract bool SupportsCore(SecurityKeyIdentifier keyIdentifier);
public abstract void WriteKeyIdentifierCore(XmlDictionaryWriter writer, SecurityKeyIdentifier keyIdentifier);
}
internal abstract class TokenEntry
{
Type[] tokenTypes = null;
protected abstract XmlDictionaryString LocalName { get; }
protected abstract XmlDictionaryString NamespaceUri { get; }
public Type TokenType { get { return GetTokenTypes()[0]; } }
public abstract string TokenTypeUri { get; }
protected abstract string ValueTypeUri { get; }
public bool SupportsCore(Type tokenType)
{
Type[] tokenTypes = GetTokenTypes();
for (int i = 0; i < tokenTypes.Length; ++i)
{
if (tokenTypes[i].IsAssignableFrom(tokenType))
return true;
}
return false;
}
protected abstract Type[] GetTokenTypesCore();
public Type[] GetTokenTypes()
{
if (this.tokenTypes == null)
this.tokenTypes = GetTokenTypesCore();
return this.tokenTypes;
}
public virtual bool SupportsTokenTypeUri(string tokenTypeUri)
{
return (this.TokenTypeUri == tokenTypeUri);
}
}
}
}
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