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使用 snmptrapd 示例，我能够轻松接收 v1 陷阱和 v2 陷阱/通知。但是，使用 v3 我无法接收陷阱。我正在使用 AES128 和 SHA1 进行隐私和身份验证。

当我“wireshark”端口 162 时，我看到“encryptedPDU: privKey unknown”来自我试图从中接收陷阱的设备。如果有帮助，它正在使用 NET-SNMP。

我能够使用 SharpSNMP 来实现应用程序，以毫无问题地获取和设置。我在这里想念什么？

下面的代码片段：

注意：engine.Start() 是从实例化类中调用的。

        registry = new UserRegistry();
        var authProvider = new SHA1AuthenticationProvider(new OctetString("authsecret"));
        var privacyProvider = new AESPrivacyProvider(new OctetString("privsecret"), authProvider);

        registry.Add(new OctetString("informuser"), privacyProvider);
        registry.Add(new OctetString("trapuser"), privacyProvider);

        TrapV1Handler = new TrapV1MessageHandler();
        TrapV1Handler.MessageReceived += WatcherTrapV1Received;
        v1Mapping = new HandlerMapping("v1", "TRAPV1", TrapV1Handler);

        TrapV2Handler = new TrapV2MessageHandler();
        TrapV2Handler.MessageReceived += WatcherTrapV2Received;
        v2Mapping = new HandlerMapping("v2,v3", "TRAPV2", TrapV2Handler);

        InformHandler = new InformRequestMessageHandler();
        InformHandler.MessageReceived += WatcherInformRequestReceived;
        informMapping = new HandlerMapping("v2,v3", "INFORM", InformHandler);

        store = new ObjectStore();
        var v1 = new Version1MembershipProvider(new OctetString("public"), new OctetString("public"));
        var v2 = new Version2MembershipProvider(new OctetString("public"), new OctetString("public"));
        var v3 = new Version3MembershipProvider();
        var membership = new ComposedMembershipProvider(new IMembershipProvider[] {v1, v2, v3});
        var handlerFactory = new MessageHandlerFactory(new[] {v1Mapping, v2Mapping, informMapping});

        var pipelineFactory = new SnmpApplicationFactory(store, membership, handlerFactory);
        engine = new SnmpEngine(pipelineFactory, new Listener { Users = registry }, new EngineGroup());
        engine.Listener.AddBinding(new IPEndPoint(IPAddress.Any, 162));
        engine.ExceptionRaised += this.DoSomething;
    }

    private void DoSomething(object sender, ExceptionRaisedEventArgs args)
    {
        // never gets here
    }

    private void WatcherInformRequestReceived(object sender, InformRequestMessageReceivedEventArgs e)
    {
        // or here for v3 (works fine for v2)
    }

    private void WatcherTrapV2Received(object sender, TrapV2MessageReceivedEventArgs e)
    {
        // or here for v3 (works fine for v2)
    }

    private void WatcherTrapV1Received(object sender, TrapV1MessageReceivedEventArgs e)
    {
        // works fine
    }
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