Como: Desabilitar sessões seguras em um WSFederationHttpBinding
Alguns serviços podem exigir credenciais federadas, mas não suportam sessões seguras. Nesse caso, você deve desativar o recurso de sessão segura. Ao contrário do WSHttpBinding, a WSFederationHttpBinding classe não fornece uma maneira de desabilitar sessões seguras ao se comunicar com um serviço. Em vez disso, você deve criar uma associação personalizada que substitua as configurações de sessão segura por um bootstrap.
Este tópico demonstra como modificar os elementos de vinculação contidos em um WSFederationHttpBinding para criar uma associação personalizada. O resultado é idêntico, exceto WSFederationHttpBinding que não usa sessões seguras.
Para criar uma associação federada personalizada sem sessão segura
Crie uma instância da WSFederationHttpBinding classe imperativamente no código ou carregando uma do arquivo de configuração.
Clone o WSFederationHttpBinding em um CustomBindingarquivo .
Encontre o SecurityBindingElement no CustomBinding.
Encontre o SecureConversationSecurityTokenParameters no SecurityBindingElement.
Substitua o original SecurityBindingElement pelo elemento de vinculação de segurança de bootstrap do SecureConversationSecurityTokenParameters.
Exemplo
Este exemplo a seguir cria uma associação federada personalizada sem sessão segura.
using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Security.Tokens;
namespace Samples
{
public sealed class CustomBindingCreator
{
// This method creates a CustomBinding based on a WSFederationHttpBinding which does not use secure conversation.
public static CustomBinding CreateFederationBindingWithoutSecureSession(WSFederationHttpBinding inputBinding)
{
// This CustomBinding starts out identical to the specified WSFederationHttpBinding.
CustomBinding outputBinding = new CustomBinding(inputBinding.CreateBindingElements());
// Find the SecurityBindingElement for message security.
SecurityBindingElement security = outputBinding.Elements.Find<SecurityBindingElement>();
// If the security mode is message, then the secure session settings are the protection token parameters.
SecureConversationSecurityTokenParameters secureConversation;
if (WSFederationHttpSecurityMode.Message == inputBinding.Security.Mode)
{
SymmetricSecurityBindingElement symmetricSecurity = security as SymmetricSecurityBindingElement;
secureConversation = symmetricSecurity.ProtectionTokenParameters as SecureConversationSecurityTokenParameters;
}
// If the security mode is message, then the secure session settings are the endorsing token parameters.
else if (WSFederationHttpSecurityMode.TransportWithMessageCredential == inputBinding.Security.Mode)
{
TransportSecurityBindingElement transportSecurity = security as TransportSecurityBindingElement;
secureConversation = transportSecurity.EndpointSupportingTokenParameters.Endorsing[0] as SecureConversationSecurityTokenParameters;
}
else
{
throw new NotSupportedException(String.Format("Unhandled security mode {0}.", inputBinding.Security.Mode));
}
// Replace the secure session SecurityBindingElement with the bootstrap SecurityBindingElement.
int securityIndex = outputBinding.Elements.IndexOf(security);
outputBinding.Elements[securityIndex] = secureConversation.BootstrapSecurityBindingElement;
// Return modified binding.
return outputBinding;
}
// It is a good practice to create a private constructor for a class that only
// defines static methods.
private CustomBindingCreator() { }
static void Main()
{
// Code not shown.
}
}
Imports System.Collections.Generic
Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.ServiceModel.Security.Tokens
Imports System.Security.Permissions
Public NotInheritable Class CustomBindingCreator
' This method creates a CustomBinding based on a WSFederationHttpBinding which does not use secure conversation.
Public Shared Function CreateFederationBindingWithoutSecureSession(ByVal inputBinding As WSFederationHttpBinding) As CustomBinding
' This CustomBinding starts out identical to the specified WSFederationHttpBinding.
Dim outputBinding As New CustomBinding(inputBinding.CreateBindingElements())
' Find the SecurityBindingElement for message security.
Dim security As SecurityBindingElement = outputBinding.Elements.Find(Of SecurityBindingElement)()
' If the security mode is message, then the secure session settings are the protection token parameters.
Dim secureConversation As SecureConversationSecurityTokenParameters
If WSFederationHttpSecurityMode.Message = inputBinding.Security.Mode Then
Dim symmetricSecurity As SymmetricSecurityBindingElement = CType(security, SymmetricSecurityBindingElement)
secureConversation = CType(symmetricSecurity.ProtectionTokenParameters, SecureConversationSecurityTokenParameters)
' If the security mode is message, then the secure session settings are the endorsing token parameters.
ElseIf WSFederationHttpSecurityMode.TransportWithMessageCredential = inputBinding.Security.Mode Then
Dim transportSecurity As TransportSecurityBindingElement = CType(security, TransportSecurityBindingElement)
secureConversation = CType(transportSecurity.EndpointSupportingTokenParameters.Endorsing(0), SecureConversationSecurityTokenParameters)
Else
Throw New NotSupportedException(String.Format("Unhandled security mode {0}.", inputBinding.Security.Mode))
End If
' Replace the secure session SecurityBindingElement with the bootstrap SecurityBindingElement.
Dim securityIndex As Integer = outputBinding.Elements.IndexOf(security)
outputBinding.Elements(securityIndex) = secureConversation.BootstrapSecurityBindingElement
' Return modified binding.
Return outputBinding
End Function
' It is a good practice to create a private constructor for a class that only
' defines static methods.
Private Sub New()
End Sub
Shared Sub Main()
End Sub
End Class
Compilando o código
- Para compilar o exemplo de código, crie um projeto que faça referência ao assembly System.ServiceModel.dll.