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我有一个托管在 IIS 中的 WCF 服务。与服务通信的客户必须拥有我们公司的客户证书之一。该服务使用证书来识别客户端并处理访问。

现在，我还希望客户端使用用户名和密码进行身份验证，以及具有双重身份验证的额外安全层。用户凭据将与证书一起用于识别客户端以处理访问。

我希望我唯一需要做的就是从客户端发送用户凭据，但我不知道如何在服务中获取它们。

仅使用证书的工作代码：

var x509ClaimSet = OperationContext.Current.ServiceSecurityContext.AuthorizationContext.ClaimSets.FirstOrDefault() as X509CertificateClaimSet;
if (x509ClaimSet == null || x509ClaimSet.X509Certificate == null)
    throw AccessDeniedException();

// throws AccessDeniedException if no client can be found
var clientId = GetClientId(x509ClaimSet.X509Certificate);

现在我正在尝试使用以下方式从客户端发送用户凭据：

var client = new ServiceClient();
client.ClientCredentials.UserName.UserName = "Foo";
client.ClientCredentials.UserName.Password = "Bar";

如何在服务中获取此用户名和密码？

当前服务配置为：

<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="DefaultBehavior">
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
          <serviceCredentials>
            <clientCertificate>
              <authentication certificateValidationMode="ChainTrust" />
            </clientCertificate>
            <serviceCertificate findValue="64343ee2c8338518e78ba698f3936dc92c90db57" x509FindType="FindByThumbprint" />
          </serviceCredentials>
        </behavior>
      </serviceBehaviors>
    </behaviors>

    <bindings>
      <wsHttpBinding>
        <binding name="DefaultBinding" maxReceivedMessageSize="2147483647">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
          <security mode="Transport">
            <transport clientCredentialType="Certificate" />
            <message clientCredentialType="UserName" />
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>

    <services>
      <service name="Service" behaviorConfiguration="DefaultBehavior">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="DefaultBinding" contract="IService" />
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>
  </system.serviceModel>
</configuration>
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