WCF 一般故障已加密，其中保护级别仅是符号

Question

如果我的服务端点上出现一般故障，则故障响应会被意外地加密。

出于互操作性原因，我创建了一个具有自定义绑定的端点，该框架使用仅通过soap 1.1 签名的传输安全设置。

    <service behaviorConfiguration="MyProject.WebServices.MyServiceBehavior"
                name="MyProject.WebServices.Protected">
    <endpoint address="" binding="customBinding" bindingConfiguration="mySoap11"
                    contract="MyProject.WebServices.IMyService">
     <identity>
      <dns value="localhost" />
     </identity>
    </endpoint>
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
   </service>

   <behavior name="MyProject.WebServices.MyServiceBehavior">
     <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
     <serviceDebug includeExceptionDetailInFaults="true" />
     <serviceCredentials>
      <clientCertificate>
       <authentication revocationMode="NoCheck" trustedStoreLocation="LocalMachine"
                                            certificateValidationMode="PeerOrChainTrust"/>
      </clientCertificate>
      <serviceCertificate findValue="aa bb cc dd ee ..."
                                            storeLocation="LocalMachine"
                                            storeName="My"
                                            x509FindType="FindByThumbprint"/>
     </serviceCredentials>
    </behavior>

   <customBinding>
    <binding name="mySoap11">
     <textMessageEncoding messageVersion="Soap11" />
     <security allowSerializedSigningTokenOnReply="true" authenticationMode="MutualCertificate"
                        requireDerivedKeys="false" securityHeaderLayout="Lax" includeTimestamp="false"
                        messageProtectionOrder="EncryptBeforeSign" messageSecurityVersion="WSSecurity10WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10"
                        requireSecurityContextCancellation="false" requireSignatureConfirmation="false">
      <localClientSettings detectReplays="false" />
      <localServiceSettings detectReplays="false" />
      <secureConversationBootstrap />
     </security>
     <httpTransport>
      <extendedProtectionPolicy policyEnforcement="Never" />
     </httpTransport>
    </binding>
   </customBinding>

有两个故障合约装饰着操作合约。第一个用于一般故障，第二个是使用企业库的验证故障契约。 服务契约属性和操作契约两个错误被修饰为

 [ValidationBehavior()]
    [ServiceContract(Namespace = "http://namespace", ProtectionLevel=ProtectionLevel.Sign)]
 public interface IMyService
    {

  [OperationContract]
        [FaultContract(typeof(ValidationFault), Namespace = "http://namespace", ProtectionLevel = ProtectionLevel.Sign)]
        [FaultContract(typeof(MyFaultContract), Namespace = "http://namespace", ProtectionLevel = ProtectionLevel.Sign)]
        MyTypeOfContractResponse Method(MyTypeOfContractRequest request);

 }

 //The message response contract

 [MessageContract(IsWrapped = false)]
    public class MyTypeOfContractResponse
    {
        [MessageBodyMember]
        public bool Success { get; set; }
    }

 //The message request contract

 [MessageContract(IsWrapped = true, ProtectionLevel=ProtectionLevel.Sign)]
    [HasSelfValidation]
    public class MyTypeOfContractRequest
    {
        [MessageBodyMember(Order = 0)]
        public bool MyValue { get; set; }

  [SelfValidation]
        public void DoValidate(ValidationResults results)
        {
   ...
  }

 }

等等...

如果发出了良好的请求，则响应正文是正常可读的签名且未加密的。如果发生验证错误或引发 WCF 错误契约异常，则响应再次有效、可读且仅带有签名。

 <s:Body u:Id="_1">
 <Success xmlns="http://namespace">true</Success>
</s:Body>

然而，如果是一般错误，它会以 throw new Exception(); 的形式抛出；或出现错误；假设消息契约消息体成员的顺序已更改；然后响应正文被加密，例如

    <s:Body u:Id="_2">
  <e:EncryptedData Id="_1" Type="http://www.w3.org/2001/04/xmlenc#Content" xmlns:e="http://www.w3.org/2001/04/xmlenc#">
   <e:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#aes256-cbc"></e:EncryptionMethod>
   <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
    <o:SecurityTokenReference xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
    <o:Reference URI="#_0"></o:Reference>
    </o:SecurityTokenReference>
   </KeyInfo>
   <e:CipherData>
    <e:CipherValue>+7Zs7rMkF...</e:CipherValue>
   </e:CipherData>
  </e:EncryptedData>
 </s:Body>

您将如何防止未处理的响应被加密？