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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
using System.Xml;
namespace System.IdentityModel.Tokens
{
/// <summary>
/// Defines a SecurityTokenHandler for Username Password Tokens.
/// </summary>
public abstract class UserNameSecurityTokenHandler : SecurityTokenHandler
{
bool _retainPassword;
/// <summary>
/// Initializes an instance of <see cref="UserNameSecurityTokenHandler"/>
/// </summary>
protected UserNameSecurityTokenHandler()
{
}
/// <summary>
/// Controls if the password will be retained in the bootstrap token that is
/// attached to the ClaimsIdentity in ValidateToken. The default is false.
/// </summary>
public virtual bool RetainPassword
{
get
{
return _retainPassword;
}
set
{
_retainPassword = value;
}
}
/// <summary>
/// Checks the given XmlReader to verify that it is pointing to a Username
/// token.
/// </summary>
/// <param name="reader">XmlReader pointing to SecurityToken.</param>
/// <returns>True if the reader is pointing to a Username SecurityToken.</returns>
/// <exception cref="ArgumentNullException">The given reader is null.</exception>
public override bool CanReadToken(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return reader.IsStartElement(WSSecurity10Constants.Elements.UsernameToken, WSSecurity10Constants.Namespace);
}
/// <summary>
/// Returns true to indicate that the handler can write UsernameSecurityToken.
/// </summary>
public override bool CanWriteToken
{
get
{
return true;
}
}
/// <summary>
/// Get the System.Type of the SecurityToken that this handler can handle.
/// </summary>
public override Type TokenType
{
get
{
return typeof(UserNameSecurityToken);
}
}
/// <summary>
/// Get the TokenTypeIdentifier of the token that this handler can work with.
/// </summary>
public override string[] GetTokenTypeIdentifiers()
{
return new string[] { SecurityTokenTypes.UserName };
}
/// <summary>
/// Reads the UsernameSecurityToken from the given XmlReader.
/// </summary>
/// <param name="reader">XmlReader pointing to the SecurityToken.</param>
/// <returns>An instance of <see cref="UserNameSecurityToken"/>.</returns>
/// <exception cref="ArgumentNullException">The parameter 'reader' is null.</exception>
/// <exception cref="XmlException">The token cannot be read.</exception>
/// <exception cref="NotSupportedException">The Password was not in plain text format.</exception>
/// <exception cref="InvalidOperationException">An unknown element was found in the SecurityToken or
/// the username was not specified.</exception>
public override SecurityToken ReadToken(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
if (!CanReadToken(reader))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new XmlException(
SR.GetString(
SR.ID4065,
WSSecurity10Constants.Elements.Username,
WSSecurity10Constants.Namespace,
reader.LocalName,
reader.NamespaceURI)));
}
string id = null;
string userName = null;
string password = null;
reader.MoveToContent();
id = reader.GetAttribute(WSUtilityConstants.Attributes.IdAttribute, WSUtilityConstants.NamespaceURI);
reader.ReadStartElement(WSSecurity10Constants.Elements.UsernameToken, WSSecurity10Constants.Namespace);
while (reader.IsStartElement())
{
if (reader.IsStartElement(WSSecurity10Constants.Elements.Username, WSSecurity10Constants.Namespace))
{
userName = reader.ReadElementString();
}
else if (reader.IsStartElement(WSSecurity10Constants.Elements.Password, WSSecurity10Constants.Namespace))
{
string type = reader.GetAttribute(WSSecurity10Constants.Attributes.Type, null);
if (!string.IsNullOrEmpty(type) && !StringComparer.Ordinal.Equals(type, WSSecurity10Constants.UPTokenPasswordTextValue))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.ID4059, type, WSSecurity10Constants.UPTokenPasswordTextValue)));
}
password = reader.ReadElementString();
}
else if (reader.IsStartElement(WSSecurity10Constants.Elements.Nonce, WSSecurity10Constants.Namespace))
{
// Nonce can be safely ignored
reader.Skip();
}
else if (reader.IsStartElement(WSUtilityConstants.ElementNames.Created, WSUtilityConstants.NamespaceURI))
{
// wsu:Created can be safely ignored
reader.Skip();
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.ID4060, reader.LocalName, reader.NamespaceURI, WSSecurity10Constants.Elements.UsernameToken, WSSecurity10Constants.Namespace)));
}
}
reader.ReadEndElement();
if (string.IsNullOrEmpty(userName))
{
throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID4061));
}
return string.IsNullOrEmpty(id) ?
new UserNameSecurityToken(userName, password) :
new UserNameSecurityToken(userName, password, id);
}
/// <summary>
/// Writes the given UsernameSecurityToken to the XmlWriter.
/// </summary>
/// <param name="writer">XmlWriter to write the token to.</param>
/// <param name="token">SecurityToken to be written.</param>
/// <exception cref="InvalidOperationException">The given token is not a UsernameSecurityToken.</exception>
/// <exception cref="ArgumentNullException">The parameter 'writer' or 'token' is null.</exception>
public override void WriteToken(XmlWriter writer, SecurityToken token)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
UserNameSecurityToken usernameSecurityToken = token as UserNameSecurityToken;
if (usernameSecurityToken == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("token", SR.GetString(SR.ID0018, typeof(UserNameSecurityToken)));
}
// <wsse:UsernameToken
writer.WriteStartElement(
WSSecurity10Constants.Elements.UsernameToken,
WSSecurity10Constants.Namespace
);
if (!string.IsNullOrEmpty(token.Id))
{
// wsu:Id="..."
writer.WriteAttributeString(
WSUtilityConstants.Attributes.IdAttribute,
WSUtilityConstants.NamespaceURI,
token.Id
);
}
// <wsse:Username>...</wsse:Username>
writer.WriteElementString(
WSSecurity10Constants.Elements.Username,
WSSecurity10Constants.Namespace,
usernameSecurityToken.UserName
);
// <wsse:Password>...</wsse:Password>
if (usernameSecurityToken.Password != null)
{
writer.WriteStartElement(
WSSecurity10Constants.Elements.Password,
WSSecurity10Constants.Namespace
);
writer.WriteAttributeString(
WSSecurity10Constants.Attributes.Type,
null,
WSSecurity10Constants.UPTokenPasswordTextValue
);
writer.WriteString(usernameSecurityToken.Password);
writer.WriteEndElement();
}
writer.WriteEndElement();
writer.Flush();
}
}
}
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