Opc.Ua“ServiceResultException：端点不支持提供的用户身份类型。”但安全级别是无

Question

我正在尝试使用 Opc.Ua Foundation 库通过我的 C# 应用程序连接到服务器，但我得到：

System.AggregateException: '发生一个或多个错误。 （端点不支持提供的用户身份类型。）'

服务器安全设置为无。

这是我的代码：

// Generate a client application
ApplicationInstance application = new ApplicationInstance();
application.ApplicationType = ApplicationType.Client;
// Load the configuration file
application.LoadApplicationConfiguration(@"path_to_file.xml", false).Wait();
ApplicationConfiguration m_configuration = application.ApplicationConfiguration;


// Get the endpoint 
EndpointDescription endpointDescription = new EndpointDescription("opc.tcp://192.168.0.213:4840/");
EndpointConfiguration endpointConfiguration = EndpointConfiguration.Create(m_configuration);
ConfiguredEndpoint endpoint = new ConfiguredEndpoint(null, endpointDescription, endpointConfiguration);

// Create the session
_uaSession = Session.Create(
m_configuration, endpoint, false, false, m_configuration.ApplicationName, (uint)m_configuration.ClientConfiguration.DefaultSessionTimeout, new UserIdentity(), null)
                    .Result;

这是端点描述的样子：

这是端点配置：

这是加载的配置：

Answer 1

您需要使用

获得

endpointDescription

CoreClientUtils.SelectEndpoint(endpointurl, security);

安全（使用证书）是一个布尔值

我为你做了一个示例代码：

var config = new ApplicationConfiguration()
        {
            ApplicationName = "MyClient",
            ApplicationUri = Utils.Format(@"urn:{0}:MyClient", System.Net.Dns.GetHostName()),
            ApplicationType = ApplicationType.Client,
            SecurityConfiguration = new SecurityConfiguration
            {
                ApplicationCertificate = new CertificateIdentifier { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\MachineDefault", SubjectName = "MyClientSubjectName" },
                TrustedIssuerCertificates = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\UA Certificate Authorities" },
                TrustedPeerCertificates = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\UA Applications" },
                RejectedCertificateStore = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\RejectedCertificates" },
                AutoAcceptUntrustedCertificates = true
            },
            TransportConfigurations = new TransportConfigurationCollection(),
            TransportQuotas = new TransportQuotas { OperationTimeout = 15000 },
            ClientConfiguration = new ClientConfiguration { DefaultSessionTimeout = 60000 },
            TraceConfiguration = new TraceConfiguration()
        };
        config.Validate(ApplicationType.Client).GetAwaiter().GetResult();

        if (config.SecurityConfiguration.AutoAcceptUntrustedCertificates)
        {
            config.CertificateValidator.CertificateValidation += (s, e) => { e.Accept = (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted); };
        }

        var application = new ApplicationInstance
        {
            ApplicationName = "MyClient",
            ApplicationType = ApplicationType.Client,
            ApplicationConfiguration = config
        };

        application.CheckApplicationInstanceCertificate(false, 2048).GetAwaiter().GetResult();

        EndpointDescription endpointDescription = CoreClientUtils.SelectEndpoint("opc.tcp://192.168.54.200:4840/", false);
        EndpointConfiguration endpointConfiguration = EndpointConfiguration.Create(config);
        ConfiguredEndpoint endpoint = new ConfiguredEndpoint(null, endpointDescription, endpointConfiguration);

        UserIdentity user = new UserIdentity();
        bool useCredentials = false;
        if (useCredentials)
        {
            user = new UserIdentity("admin", "admin");
        }

        // Sets whether or not the discovery endpoint is used to update the endpoint description before connecting.
        bool updateBeforeConnect = false;

        // Sets whether or not the domain in the certificate must match the endpoint used
        bool checkDomain = false;

        // The name to assign to the session
        string sessionName = config.ApplicationName;

        // The session's timeout interval
        uint sessionTimeout = 60000;

        // List of preferred locales
        List<string> preferredLocales = null;

        // Create the session
        Session session = Session.Create(
                    config,
                    endpoint,
                    updateBeforeConnect,
                    checkDomain,
                    sessionName,
                    sessionTimeout,
                    user,
                    preferredLocales
                ).Result;

        if (session != null && session.Connected)
        {
            Console.WriteLine("connected");
        }
    }

你可能需要改变一些东西，但这是最基本的。您不在此处使用证书（如果将安全性更改为 true，则可以使用）。在我的个人资料中有一些问题可以回答更多关于证书的问题。 还要确保你可以访问你的 OPC ua 服务器（我猜你的是西门子，因为端口）是开放的来宾身份验证 en 没有安全（证书）你可以在 tia 门户 - > plc 设置 - > opc ua 服务器设置中更改它

编辑：您也可以使用 xml 文件（就像您现在正在做的那样）。如果你这样做，你不需要我上面的代码

EndpointDescription endpointDescription