c# - WCF SslStreamSecurity DNS 身份检查仅针对 4.6 框架失败

Question

我正在为托管在 IIS 中的 Wcf 服务开发新的绑定(bind)，我以为一切正常，但事实证明，如果我更改它，客户端仅在针对 .Net Framework 4.5 时才有效以 4.6 为目标，然后在尝试打开连接时出现以下错误:

System.ServiceModel.Security.MessageSecurityException occurred
  HResult=-2146233087
  Message=The Identity check failed for the outgoing message. The remote endpoint did not provide a domain name system (DNS) claim and therefore did not satisfied DNS identity 'xxx.domain.local'. This may be caused by lack of DNS or CN name in the remote endpoint X.509 certificate's distinguished name.
  Source=System.ServiceModel
  StackTrace:
       at System.ServiceModel.Security.IdentityVerifier.EnsureIdentity(EndpointAddress serviceReference, AuthorizationContext authorizationContext, String errorString)

如果我除了将测试代码中的目标框架改回 4.5 之外什么都不做，那么它工作正常。这让我觉得它可能是 .Net 4.6 中的一个错误，我知道有 Wcf ssl changes made in 4.6

打开第一次机会异常后，我看到在 System.ServiceModel 内部引发的以下异常

System.ArgumentNullException occurred
  HResult=-2147467261
  Message=Value cannot be null.
Parameter name: value
  ParamName=value
  Source=mscorlib
  StackTrace:
       at System.Enum.TryParseEnum(Type enumType, String value, Boolean ignoreCase, EnumResult& parseResult)
  InnerException: 

    System.ServiceModel.dll!System.ServiceModel.Security.IssuanceTokenProviderBase<System.ServiceModel.Security.Tokens.IssuedSecurityTokenProvider.FederatedTokenProviderState>.DoNegotiation(System.TimeSpan timeout)  Unknown     System.ServiceModel.dll!System.ServiceModel.Security.IssuanceTokenProviderBase<System.ServiceModel.Security.Tokens.IssuedSecurityTokenProvider.FederatedTokenProviderState>.GetTokenCore(System.TimeSpan timeout)   Unknown
    System.IdentityModel.dll!System.IdentityModel.Selectors.SecurityTokenProvider.GetToken(System.TimeSpan timeout) Unknown
    System.ServiceModel.dll!System.ServiceModel.Security.Tokens.IssuedSecurityTokenProvider.GetTokenCore(System.TimeSpan timeout)   Unknown
    System.IdentityModel.dll!System.IdentityModel.Selectors.SecurityTokenProvider.GetToken(System.TimeSpan timeout) Unknown
    System.ServiceModel.dll!System.ServiceModel.Security.SecurityProtocol.TryGetSupportingTokens(System.ServiceModel.Security.SecurityProtocolFactory factory, System.ServiceModel.EndpointAddress target, System.Uri via, System.ServiceModel.Channels.Message message, System.TimeSpan timeout, bool isBlockingCall, out System.Collections.Generic.IList<System.ServiceModel.Security.SupportingTokenSpecification> supportingTokens)    Unknown
    System.ServiceModel.dll!System.ServiceModel.Security.TransportSecurityProtocol.SecureOutgoingMessageAtInitiator(ref System.ServiceModel.Channels.Message message, string actor, System.TimeSpan timeout)    Unknown
    System.ServiceModel.dll!System.ServiceModel.Security.TransportSecurityProtocol.SecureOutgoingMessage(ref System.ServiceModel.Channels.Message message, System.TimeSpan timeout) Unknown
    System.ServiceModel.dll!System.ServiceModel.Security.SecurityProtocol.SecureOutgoingMessage(ref System.ServiceModel.Channels.Message message, System.TimeSpan timeout, System.ServiceModel.Security.SecurityProtocolCorrelationState correlationState)  Unknown
    System.ServiceModel.dll!System.ServiceModel.Channels.SecurityChannelFactory<System.ServiceModel.Channels.IRequestChannel>.SecurityRequestChannel.Request(System.ServiceModel.Channels.Message message, System.TimeSpan timeout) Unknown
    System.ServiceModel.dll!System.ServiceModel.Channels.TransactionRequestChannelGeneric<System.ServiceModel.Channels.IRequestChannel>.Request(System.ServiceModel.Channels.Message message, System.TimeSpan timeout)  Unknown
    System.ServiceModel.dll!System.ServiceModel.Dispatcher.RequestChannelBinder.Request(System.ServiceModel.Channels.Message message, System.TimeSpan timeout)  Unknown
    System.ServiceModel.dll!System.ServiceModel.Channels.ServiceChannel.Call(string action, bool oneway, System.ServiceModel.Dispatcher.ProxyOperationRuntime operation, object[] ins, object[] outs, System.TimeSpan timeout)  Unknown
    System.ServiceModel.dll!System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(System.Runtime.Remoting.Messaging.IMethodCallMessage methodCall, System.ServiceModel.Dispatcher.ProxyOperationRuntime operation) Unknown
    System.ServiceModel.dll!System.ServiceModel.Channels.ServiceChannelProxy.Invoke(System.Runtime.Remoting.Messaging.IMessage message) Unknown
    mscorlib.dll!System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(ref System.Runtime.Remoting.Proxies.MessageData msgData, int type) Unknown

与之通信的 wcf 服务的目标是 4.6，据我所知，我正在指定 dns 身份，它确实作为 CN= 存在于证书主题中。该绑定(bind)是一个自定义绑定(bind)，因此我可以执行联合 net.tcp，客户端在代码中创建所有内容，我不使用 visual studio 中的添加服务引用功能，客户端代码正在创建绑定(bind):

var binding = new CustomBinding(new BindingElement[] {
            new TransactionFlowBindingElement(),
            security,
            new SslStreamSecurityBindingElement(),
            new BinaryMessageEncodingBindingElement() {
                ReaderQuotas = { MaxDepth = maxReceivedSizeBytes, MaxStringContentLength = maxReceivedSizeBytes, MaxArrayLength = maxReceivedSizeBytes, MaxBytesPerRead = maxReceivedSizeBytes, MaxNameTableCharCount = maxReceivedSizeBytes },
            },
            new TcpTransportBindingElement {
                TransferMode = TransferMode.StreamedResponse,
                MaxReceivedMessageSize = maxReceivedSizeBytes,
            },
        }) {
    SendTimeout = sendTimeout,
};

var channelFactory = new ChannelFactory<T>(binding, new EndpointAddress(new Uri(url), EndpointIdentity.CreateDnsIdentity("xxx.domain.local"), new AddressHeader[0]));

这可能是 4.6 框架中导致不同行为的错误吗？接下来的步骤是否只是尝试单步执行和调试框架代码以尝试找出 4.6 行为不同的原因？

编辑 - 我创建了一个 small sample project that demonstrates the error ，复现步骤为:

• (使用 VS 2015)打开 WcfSelfHostedServer 解决方案
• 使用 mmc 将 IdentityFail.pfx 证书添加到您的本地计算机、个人商店
• 运行 WcfSelfHostedServer 项目(可能单击防火墙是允许端口 30000)
• 打开 WcfClient 解决方案
• 右键项目>属性，注意是针对4.6.1
• 运行项目，会抛出上述异常
• 现在将客户端切换到目标 4.5.2，它将正常运行，没有错误

更新 - 我发现以下内容似乎相关: https://support.microsoft.com/en-us/kb/3069494 https://msdn.microsoft.com/en-us/library/mt298998(v=vs.110).aspx

但在服务器和客户端指定 Tls12 并没有解决问题，即使添加 DontEnableSchUseStrongCrypto=true 标志也不会影响 DNS 身份检查错误，即使它绕过了 Enum.Parse 内部错误 was being thrown from this line

Answer 1

我需要查看 Retargetting Changes in the .NET Framework 4.6.1 ，因为证书验证逻辑在该版本中发生了变化。 (change in behavior for X509CertificateClaimSet.FindClaims 导致了我的问题)

修复是编辑我的 app.config 以添加:

<runtime>
    <AppContextSwitchOverrides value="Switch.System.IdentityModel.DisableMultipleDNSEntriesInSANCertificate=true" /> 
</runtime>

你可以看到 changed code on referencesource ，当然 makecert.exe 似乎不支持 generating certificates with "Subject Alternative Name" fields