Как обращаться к службе WSE 3.0 с помощью клиента WCF

Статья
02/28/2011

Клиенты Windows Communication Foundation (WCF) на уровне линий связи совместимы со службами расширений веб-служб (WSE) версии 3.0 для Microsoft .NET, если клиенты WCF настроены на использование спецификации WS-Addressing (версия от августа 2004 г.). Тем не менее, службы WSE 3.0 не поддерживают протокол обмена метаданными (MEX), поэтому при использовании для создания клиентского класса WCF служебного средства Служебное средство ServiceModel Metadata Utility Tool (Svcutil.exe) параметры безопасности не применяются к сформированному клиенту WCF. Следовательно, необходимо задавать параметры безопасности, которые требует служба WSE 3.0, после формирования клиента WCF.

Эти параметры безопасности можно применить путем использования пользовательской привязки для принятия во внимание требований службы WSE 3.0 и требований в отношении взаимодействия между службой WSE 3.0 и клиентом WCF. Требования в отношении взаимодействия включают использование упомянутой выше спецификации WS-Addressing от августа 2004 г. и предусмотренной в WSE 3.0 защиты сообщений по умолчанию с помощью поля SignBeforeEncrypt. По умолчанию для защиты сообщений в WCF используется поле SignBeforeEncryptAndEncryptSignature. В этом разделе описывается создание привязки WCF, взаимодействующей со службой WSE 3.0. В WCF также имеется образец, содержащий эту привязку. Дополнительные сведения б этом образце см. в разделе Interoperating with WSE.

Обращение к веб-службе WSE 3.0 с помощью клиента WCF

Запустите Служебное средство ServiceModel Metadata Utility Tool (Svcutil.exe), чтобы создать клиент WCF для веб-службы WSE 3.0.

Для веб-службы WSE 3.0 создается клиент WCF. Поскольку WSE 3.0 не поддерживает протокол MEX, использовать SvcUtil.exe для извлечения требований безопасности для веб-службы нельзя. Добавить параметры безопасности для клиента должен разработчик приложения.

Дополнительные сведения создании клиента WCF см. в разделе Как создать клиент Windows Communication Foundation.

Создайте класс, представляющий привязку, которая может обмениваться данными с веб-службами WSE 3.0.

Следующий класс входит в образец Interoperating with WSE.

Создайте класс, наследуемый от класса Binding.

В следующем примере кода создается класс с именем WseHttpBinding, наследуемый от класса Binding.
```
Public Class WseHttpBinding
    Inherits Binding
```
```
public class WseHttpBinding : Binding
{
```

Добавьте в класс свойства, задающие готовое к использованию утверждение WSE (используемое службой WSE), указывающие, требуются ли производные ключи, используются ли безопасные сеансы, требуется ли подтверждение подписей, а также задающие параметры защиты сообщений. В WSE 3.0 готовое к использованию утверждение задает требования безопасности для клиента или веб-службы, подобно режиму проверки подлинности привязки в WCF.

В следующем примере кода определяются свойства SecurityAssertion, RequireDerivedKeys, EstablishSecurityContext и MessageProtectionOrder, которые задают готовое к использованию утверждение WSE, указывают, требуются ли производные ключи, используются ли безопасные сеансы, требуется ли подтверждение сигнатур, и задают параметры защиты сообщений соответственно.

Public Property SecurityAssertion() As WseSecurityAssertion

    Get

        Return assertion

    End Get
    Set(ByVal value As WseSecurityAssertion)

        assertion = value

    End Set

End Property

Private m_requireDerivedKeys As Boolean
Public Property RequireDerivedKeys() As Boolean

    Get

        Return m_requireDerivedKeys

    End Get
    Set(ByVal value As Boolean)

        m_requireDerivedKeys = value

    End Set

End Property

Private m_establishSecurityContext As Boolean
Public Property EstablishSecurityContext() As Boolean

    Get

        Return m_establishSecurityContext

    End Get
    Set(ByVal value As Boolean)

        m_establishSecurityContext = value

    End Set

End Property

Private m_requireSignatureConfirmation As Boolean
Public Property RequireSignatureConfirmation() As Boolean

    Get

        Return m_requireSignatureConfirmation

    End Get
    Set(ByVal value As Boolean)

        m_requireSignatureConfirmation = value

    End Set

End Property

Private m_messageProtectionOrder As MessageProtectionOrder
Public Property MessageProtectionOrder() As MessageProtectionOrder

    Get

        Return m_messageProtectionOrder

    End Get
    Set(ByVal value As MessageProtectionOrder)

        m_messageProtectionOrder = value

    End Set

End Property

private WseSecurityAssertion assertion;
public WseSecurityAssertion SecurityAssertion
{
    get { return assertion; }
    set { assertion = value; }
}

private bool requireDerivedKeys;
public bool RequireDerivedKeys
{
    get { return requireDerivedKeys; }
    set { requireDerivedKeys = value; }
}

private bool establishSecurityContext;
public bool EstablishSecurityContext
{
    get { return establishSecurityContext; }
    set { establishSecurityContext = value; }
}

private bool requireSignatureConfirmation;
public bool RequireSignatureConfirmation
{
    get { return requireSignatureConfirmation; }
    set { requireSignatureConfirmation = value; }
}

private MessageProtectionOrder messageProtectionOrder;
public MessageProtectionOrder MessageProtectionOrder
{
    get { return messageProtectionOrder; }
    set { messageProtectionOrder = value; }
}

Переопределите метод CreateBindingElements для задания свойств привязки.

В следующем примере кода транспорт, кодирование сообщений и параметры защиты сообщений задаются получением значений свойств SecurityAssertion и MessageProtectionOrder.

Public Overloads Overrides Function CreateBindingElements() As BindingElementCollection

    'SecurityBindingElement sbe = bec.Find<SecurityBindingElement>();
    Dim bec As New BindingElementCollection()
    ' By default http transport is used
    Dim securityBinding As SecurityBindingElement
    Dim transport As BindingElement

    Select Case assertion

        Case WseSecurityAssertion.UsernameOverTransport
            transport = New HttpsTransportBindingElement()
            securityBinding = DirectCast(SecurityBindingElement.CreateUserNameOverTransportBindingElement(), TransportSecurityBindingElement)
            If m_establishSecurityContext = True Then
                Throw New InvalidOperationException("Secure Conversation is not supported for this Security Assertion Type")
            End If
            If m_requireSignatureConfirmation = True Then
                Throw New InvalidOperationException("Signature Confirmation is not supported for this Security Assertion Type")
            End If
            Exit Select
        Case WseSecurityAssertion.MutualCertificate10
            transport = New HttpTransportBindingElement()
            securityBinding = SecurityBindingElement.CreateMutualCertificateBindingElement(MessageSecurityVersion.WSSecurity10WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10)
            If m_requireSignatureConfirmation = True Then
                Throw New InvalidOperationException("Signature Confirmation is not supported for this Security Assertion Type")
            End If
            DirectCast(securityBinding, AsymmetricSecurityBindingElement).MessageProtectionOrder = m_messageProtectionOrder
            Exit Select
        Case WseSecurityAssertion.UsernameForCertificate
            transport = New HttpTransportBindingElement()
            securityBinding = DirectCast(SecurityBindingElement.CreateUserNameForCertificateBindingElement(), SymmetricSecurityBindingElement)
            ' We want signatureconfirmation on the bootstrap process 
            ' either for the application messages or for the RST/RSTR
            DirectCast(securityBinding, SymmetricSecurityBindingElement).RequireSignatureConfirmation = m_requireSignatureConfirmation
            DirectCast(securityBinding, SymmetricSecurityBindingElement).MessageProtectionOrder = m_messageProtectionOrder
            Exit Select
        Case WseSecurityAssertion.AnonymousForCertificate
            transport = New HttpTransportBindingElement()
            securityBinding = DirectCast(SecurityBindingElement.CreateAnonymousForCertificateBindingElement(), SymmetricSecurityBindingElement)
            DirectCast(securityBinding, SymmetricSecurityBindingElement).RequireSignatureConfirmation = m_requireSignatureConfirmation
            DirectCast(securityBinding, SymmetricSecurityBindingElement).MessageProtectionOrder = m_messageProtectionOrder
            Exit Select
        Case WseSecurityAssertion.MutualCertificate11
            transport = New HttpTransportBindingElement()
            securityBinding = SecurityBindingElement.CreateMutualCertificateBindingElement(MessageSecurityVersion.WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11)
            DirectCast(securityBinding, SymmetricSecurityBindingElement).RequireSignatureConfirmation = m_requireSignatureConfirmation
            DirectCast(securityBinding, SymmetricSecurityBindingElement).MessageProtectionOrder = m_messageProtectionOrder
            Exit Select
        Case WseSecurityAssertion.Kerberos
            transport = New HttpTransportBindingElement()
            securityBinding = DirectCast(SecurityBindingElement.CreateKerberosBindingElement(), SymmetricSecurityBindingElement)
            DirectCast(securityBinding, SymmetricSecurityBindingElement).RequireSignatureConfirmation = m_requireSignatureConfirmation
            DirectCast(securityBinding, SymmetricSecurityBindingElement).MessageProtectionOrder = m_messageProtectionOrder
            Exit Select
        Case Else
            Throw New NotSupportedException("This supplied Wse security assertion is not supported")

    End Select

    'Set defaults for the security binding
    securityBinding.IncludeTimestamp = True

    ' Derived Keys
    ' Set the preference for derived keys before creating the binding for SecureConversation.
    securityBinding.SetKeyDerivation(m_requireDerivedKeys)

    'Secure Conversation 
    If m_establishSecurityContext = True Then

        Dim secureconversation As SymmetricSecurityBindingElement = DirectCast(SymmetricSecurityBindingElement.CreateSecureConversationBindingElement(securityBinding, False), SymmetricSecurityBindingElement)
        ' This is the default
        'secureconversation.DefaultProtectionLevel = ProtectionLevel.EncryptAndSign;        

        'Set defaults for the secure conversation binding
        secureconversation.DefaultAlgorithmSuite = SecurityAlgorithmSuite.Basic256
        ' We do not want signature confirmation on the application level messages 
        ' when secure conversation is enabled.
        secureconversation.RequireSignatureConfirmation = False
        secureconversation.MessageProtectionOrder = m_messageProtectionOrder
        secureconversation.SetKeyDerivation(m_requireDerivedKeys)
        securityBinding = secureconversation

    End If

    ' Add the security binding to the binding collection
    bec.Add(securityBinding)

    ' Add the message encoder. 
    Dim textelement As New TextMessageEncodingBindingElement()
    textelement.MessageVersion = System.ServiceModel.Channels.MessageVersion.Soap11WSAddressingAugust2004
    'These are the defaults required for WSE
    'textelement.MessageVersion = MessageVersion.Soap11Addressing1;
    'textelement.WriteEncoding = System.Text.Encoding.UTF8;
    bec.Add(textelement)

    ' Add the transport
    bec.Add(transport)

    ' return the binding elements
    Return bec

End Function

public override BindingElementCollection CreateBindingElements()
{
    //SecurityBindingElement sbe = bec.Find<SecurityBindingElement>();
    BindingElementCollection bec = new BindingElementCollection();
    // By default http transport is used
    SecurityBindingElement securityBinding;
    BindingElement transport;

    switch (assertion)
    {
        case WseSecurityAssertion.UsernameOverTransport:
            transport = new HttpsTransportBindingElement();
            securityBinding = (TransportSecurityBindingElement)SecurityBindingElement.CreateUserNameOverTransportBindingElement();
            if (establishSecurityContext == true)
                throw new InvalidOperationException("Secure Conversation is not supported for this Security Assertion Type");
            if (requireSignatureConfirmation == true)
                throw new InvalidOperationException("Signature Confirmation is not supported for this Security Assertion Type");
            break;
        case WseSecurityAssertion.MutualCertificate10:
            transport = new HttpTransportBindingElement();
            securityBinding = SecurityBindingElement.CreateMutualCertificateBindingElement(MessageSecurityVersion.WSSecurity10WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10);
            if (requireSignatureConfirmation == true)
                throw new InvalidOperationException("Signature Confirmation is not supported for this Security Assertion Type");
            ((AsymmetricSecurityBindingElement)securityBinding).MessageProtectionOrder = messageProtectionOrder;
            break;
        case WseSecurityAssertion.UsernameForCertificate:
            transport = new HttpTransportBindingElement();
            securityBinding = (SymmetricSecurityBindingElement)SecurityBindingElement.CreateUserNameForCertificateBindingElement();
            // We want signatureconfirmation on the bootstrap process 
            // either for the application messages or for the RST/RSTR
            ((SymmetricSecurityBindingElement)securityBinding).RequireSignatureConfirmation = requireSignatureConfirmation;
            ((SymmetricSecurityBindingElement)securityBinding).MessageProtectionOrder = messageProtectionOrder;
            break;
        case WseSecurityAssertion.AnonymousForCertificate:
            transport = new HttpTransportBindingElement();
            securityBinding = (SymmetricSecurityBindingElement)SecurityBindingElement.CreateAnonymousForCertificateBindingElement();
            ((SymmetricSecurityBindingElement)securityBinding).RequireSignatureConfirmation = requireSignatureConfirmation;
            ((SymmetricSecurityBindingElement)securityBinding).MessageProtectionOrder = messageProtectionOrder;
            break;
        case WseSecurityAssertion.MutualCertificate11:
            transport = new HttpTransportBindingElement();
            securityBinding = SecurityBindingElement.CreateMutualCertificateBindingElement(MessageSecurityVersion.WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11);
            ((SymmetricSecurityBindingElement)securityBinding).RequireSignatureConfirmation = requireSignatureConfirmation;
            ((SymmetricSecurityBindingElement)securityBinding).MessageProtectionOrder = messageProtectionOrder;
            break;
        case WseSecurityAssertion.Kerberos:
            transport = new HttpTransportBindingElement();
            securityBinding = (SymmetricSecurityBindingElement)SecurityBindingElement.CreateKerberosBindingElement();
            ((SymmetricSecurityBindingElement)securityBinding).RequireSignatureConfirmation = requireSignatureConfirmation;
            ((SymmetricSecurityBindingElement)securityBinding).MessageProtectionOrder = messageProtectionOrder;
            break;
        default:
            throw new NotSupportedException("This supplied Wse security assertion is not supported");
    }
    //Set defaults for the security binding
    securityBinding.IncludeTimestamp = true;

    // Derived Keys
    // set the preference for derived keys before creating SecureConversationBindingElement
    securityBinding.SetKeyDerivation(requireDerivedKeys);

    //Secure Conversation 
    if (establishSecurityContext == true)
    {
        SymmetricSecurityBindingElement secureconversation =
                (SymmetricSecurityBindingElement)SymmetricSecurityBindingElement.CreateSecureConversationBindingElement(
                                            securityBinding, false);
        // This is the default
        //secureconversation.DefaultProtectionLevel = ProtectionLevel.EncryptAndSign;                

        //Set defaults for the secure conversation binding
        secureconversation.DefaultAlgorithmSuite = SecurityAlgorithmSuite.Basic256;
        // We do not want signature confirmation on the application level messages 
        // when secure conversation is enabled.
        secureconversation.RequireSignatureConfirmation = false;
        secureconversation.MessageProtectionOrder = messageProtectionOrder;
        secureconversation.SetKeyDerivation(requireDerivedKeys);
        securityBinding = secureconversation;
    }

    // Add the security binding to the binding collection
    bec.Add(securityBinding);

    // Add the message encoder. 
    TextMessageEncodingBindingElement textelement = new TextMessageEncodingBindingElement();
    textelement.MessageVersion = MessageVersion.Soap11WSAddressingAugust2004;
    //These are the defaults required for WSE
    //textelement.MessageVersion = MessageVersion.Soap11Addressing1;
    //textelement.WriteEncoding = System.Text.Encoding.UTF8;
    bec.Add(textelement);

    // Add the transport
    bec.Add(transport);


    // return the binding elements
    return bec;
}

В коде клиентского приложения добавьте код для задания свойств привязки.

В следующем примере кода указывается, что клиент WCF должен использовать защиту сообщений и проверку подлинности в соответствии с готовым к использованию утверждением безопасности WSE 3.0 AnonymousForCertificate. Кроме того, требуются безопасные сеансы и производные ключи.

Private Shared Sub CallWseService(ByVal usePolicyFile As Boolean)

    Dim address As New EndpointAddress(New Uri("https://localhost/WSSecurityAnonymousPolicy/WSSecurityAnonymousService.asmx"), EndpointIdentity.CreateDnsIdentity("WSE2QuickStartServer"))

    Dim binding As New WseHttpBinding()
    If Not usePolicyFile Then

        binding.SecurityAssertion = WseSecurityAssertion.AnonymousForCertificate
        binding.EstablishSecurityContext = True
        binding.RequireDerivedKeys = True
        binding.MessageProtectionOrder = MessageProtectionOrder.SignBeforeEncrypt

    Else
        binding.LoadPolicy("..\wse3policyCache.config", "ServerPolicy")
    End If

    Dim client As New WSSecurityAnonymousServiceSoapClient(binding, address)

static void CallWseService(bool usePolicyFile)
{
    EndpointAddress address = new EndpointAddress(new Uri("https://localhost/WSSecurityAnonymousPolicy/WSSecurityAnonymousService.asmx"),
                                                  EndpointIdentity.CreateDnsIdentity("WSE2QuickStartServer"));

    WseHttpBinding binding = new WseHttpBinding();
    if (!usePolicyFile)
    {
        binding.SecurityAssertion = WseSecurityAssertion.AnonymousForCertificate;
        binding.EstablishSecurityContext = true;
        binding.RequireDerivedKeys = true;
        binding.MessageProtectionOrder = MessageProtectionOrder.SignBeforeEncrypt;
    }
    else
        binding.LoadPolicy("..\\wse3policyCache.config", "ServerPolicy");

    WSSecurityAnonymousServiceSoapClient client = new WSSecurityAnonymousServiceSoapClient(binding, address);

Пример

В следующем примере кода определяется пользовательская привязка, предоставляющая свойства, соответствующие свойствам готового к использованию утверждения безопасности WSE 3.0. Эта пользовательская привязка (с именем WseHttpBinding) затем используется для задания свойств привязки для клиента WCF, который обменивается данными с образцом WSSecurityAnonymous WSE 3.0 из учебника.

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Security.Cryptography.X509Certificates
Imports System.ServiceModel
Imports System.ServiceModel.Security
Imports System.ServiceModel.Channels
Imports Microsoft.VisualBasic

Namespace Microsoft.ServiceModel.Samples

    ' The service contract is defined in generatedClient.vb, generated from the service by

    ' the svcutil tool.
    Class Program

        Public Shared Sub Main(ByVal args As String())

            CallWseService(True)

        End Sub

        Private Shared Sub CallWseService(ByVal usePolicyFile As Boolean)

            Dim address As New EndpointAddress(New Uri("https://localhost/WSSecurityAnonymousPolicy/WSSecurityAnonymousService.asmx"), EndpointIdentity.CreateDnsIdentity("WSE2QuickStartServer"))

            Dim binding As New WseHttpBinding()
            If Not usePolicyFile Then

                binding.SecurityAssertion = WseSecurityAssertion.AnonymousForCertificate
                binding.EstablishSecurityContext = True
                binding.RequireDerivedKeys = True
                binding.MessageProtectionOrder = MessageProtectionOrder.SignBeforeEncrypt

            Else
                binding.LoadPolicy("..\wse3policyCache.config", "ServerPolicy")
            End If

            Dim client As New WSSecurityAnonymousServiceSoapClient(binding, address)

            ' Need to supply the credentials depending on the type of WseSecurityAssertion used.
            ' Anonymous only requires server certificate. UsernameForCertificate would also require
            ' a username and password to be supplied.
            client.ClientCredentials.ServiceCertificate.SetDefaultCertificate(StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectDistinguishedName, "CN=WSE2QuickStartServer")
            Dim symbols As String() = New String() {"FABRIKAM", "CONTOSO"}
            Dim quotes As StockQuote() = client.StockQuoteRequest(symbols)

            client.Close()

            ' Success!
            For Each quote As StockQuote In quotes

                Console.WriteLine("")
                Console.WriteLine("Symbol: " + quote.Symbol)
                Console.WriteLine("" & Chr(9) & "Name:" & Chr(9) & "" & Chr(9) & "" & Chr(9) & "" + quote.Name)
                Console.WriteLine("" & Chr(9) & "Last Price:" & Chr(9) & "" & Chr(9) & "" & quote.Last)
                Console.WriteLine("" & Chr(9) & "Previous Change:" & Chr(9) & "" & quote.PreviousChange & "%")

            Next

            Console.WriteLine("Press <ENTER> to terminate client.")
            Console.ReadLine()

        End Sub

    End Class

End Namespace

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography.X509Certificates;
using System.ServiceModel;
using System.ServiceModel.Security;
using System.ServiceModel.Channels;

namespace Microsoft.ServiceModel.Samples
{
    // The service contract is defined in generatedClient.cs, generated from the service by
    // the svcutil tool.

    class Program
    {
        static void Main(string[] args)
        {
            CallWseService(true);
        }
        static void CallWseService(bool usePolicyFile)
        {
            EndpointAddress address = new EndpointAddress(new Uri("https://localhost/WSSecurityAnonymousPolicy/WSSecurityAnonymousService.asmx"),
                                                          EndpointIdentity.CreateDnsIdentity("WSE2QuickStartServer"));

            WseHttpBinding binding = new WseHttpBinding();
            if (!usePolicyFile)
            {
                binding.SecurityAssertion = WseSecurityAssertion.AnonymousForCertificate;
                binding.EstablishSecurityContext = true;
                binding.RequireDerivedKeys = true;
                binding.MessageProtectionOrder = MessageProtectionOrder.SignBeforeEncrypt;
            }
            else
                binding.LoadPolicy("..\\wse3policyCache.config", "ServerPolicy");

            WSSecurityAnonymousServiceSoapClient client = new WSSecurityAnonymousServiceSoapClient(binding, address);

            // Need to supply the credentials depending on the type of WseSecurityAssertion used.
            // Anonymous only requires server certificate. UsernameForCertificate would also require
            // a username and password to be supplied.
            client.ClientCredentials.ServiceCertificate.SetDefaultCertificate(
                                                                 StoreLocation.LocalMachine,
                                                                 StoreName.My,
                                                                 X509FindType.FindBySubjectDistinguishedName,
                                                                 "CN=WSE2QuickStartServer");
            string[] symbols = new string[] { "FABRIKAM", "CONTOSO" };
            StockQuote[] quotes = client.StockQuoteRequest(symbols);

            client.Close();

            // Success!
            foreach (StockQuote quote in quotes)
            {
                Console.WriteLine("");
                Console.WriteLine("Symbol: " + quote.Symbol);
                Console.WriteLine("\tName:\t\t\t" + quote.Name);
                Console.WriteLine("\tLast Price:\t\t" + quote.Last);
                Console.WriteLine("\tPrevious Change:\t" + quote.PreviousChange + "%");
            }

            Console.WriteLine("Press <ENTER> to terminate client.");
            Console.ReadLine();
        }
    }
}

Поделиться через

Как обращаться к службе WSE 3.0 с помощью клиента WCF

Обращение к веб-службе WSE 3.0 с помощью клиента WCF

Пример

См. также

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