Bug Crypt32.dll error during client configuration for OPC UA app (UWP)

Hey guys, I have a working .NET app that uses the OPC UA protocol. I'm trying to get it to work on Unity as a UWP app, but I get an error while trying to create the client configuration:



And below is the code from the relevant method. The only two external assemblies I use are called Opc.Ua.Client and Opc.Ua.Core. Any assistance would be greatly appreciated!

Code (CSharp):

1.  private static ApplicationConfiguration CreateClientConfiguration()
2.         {
3.             // The application configuration can be loaded from any file.
4.             // ApplicationConfiguration.Load() method loads configuration by looking up a file path in the App.config.
5.             // This approach allows applications to share configuration files and to update them.
6.             // This example creates a minimum ApplicationConfiguration using its default constructor.
7.             ApplicationConfiguration configuration = new ApplicationConfiguration();
8.  
9.             // Step 1 - Specify the client identity.
10.             configuration.ApplicationName = "UA Client 1500";
11.             configuration.ApplicationType = ApplicationType.Client;
12.             configuration.ApplicationUri = "urn:MyClient"; //Kepp this syntax
13.             configuration.ProductUri = "SiemensAG.IndustryOnlineSupport";
14.  
15.             // Step 2 - Specify the client's application instance certificate.
16.             // Application instance certificates must be placed in a windows certficate store because that is
17.             // the best way to protect the private key. Certificates in a store are identified with 4 parameters:
18.             // StoreLocation, StoreName, SubjectName and Thumbprint.
19.             // When using StoreType = Directory you need to have the opc.ua.certificategenerator.exe installed on your machine
20.  
21.             configuration.SecurityConfiguration = new SecurityConfiguration();
22.             configuration.SecurityConfiguration.ApplicationCertificate = new CertificateIdentifier();
23.             configuration.SecurityConfiguration.ApplicationCertificate.StoreType = CertificateStoreType.Windows;
24.             configuration.SecurityConfiguration.ApplicationCertificate.StorePath = "CurrentUser\\My";
25.             configuration.SecurityConfiguration.ApplicationCertificate.SubjectName = configuration.ApplicationName;
26.  
27.             // Define trusted root store for server certificate checks
28.             configuration.SecurityConfiguration.TrustedIssuerCertificates.StoreType = CertificateStoreType.Windows;
29.             configuration.SecurityConfiguration.TrustedIssuerCertificates.StorePath = "CurrentUser\\Root";
30.             configuration.SecurityConfiguration.TrustedPeerCertificates.StoreType = CertificateStoreType.Windows;
31.             configuration.SecurityConfiguration.TrustedPeerCertificates.StorePath = "CurrentUser\\Root";
32.  
33.             // find the client certificate in the store.
34.             X509Certificate2 clientCertificate = configuration.SecurityConfiguration.ApplicationCertificate.Find(true);
35.  
36.             // create a new self signed certificate if not found.
37.             if (clientCertificate == null)
38.             {
39.                 // Get local interface ip addresses and DNS name
40.                 List<string> localIps = GetLocalIpAddressAndDns();
41.  
42.                 UInt16 keySize = 2048; //must be multiples of 1024
43.                 UInt16 lifeTime = 24; //in month
44.                 UInt16 algorithm = 1; //0 = SHA1; 1 = SHA256
45.  
46.                 // this code would normally be called as part of the installer - called here to illustrate.
47.                 // create a new certificate an place it in the current user certificate store.
48.                 clientCertificate = CertificateFactory.CreateCertificate(
49.                     configuration.SecurityConfiguration.ApplicationCertificate.StoreType,
50.                     configuration.SecurityConfiguration.ApplicationCertificate.StorePath,
51.                     configuration.ApplicationUri,
52.                     configuration.ApplicationName,
53.                     null,
54.                     localIps,
55.                     keySize,
56.                     lifeTime,
57.                     algorithm);
58.             }
59.  
60.             // Step 3 - Specify the supported transport quotas.
61.             // The transport quotas are used to set limits on the contents of messages and are
62.             // used to protect against DOS attacks and rogue clients. They should be set to
63.             // reasonable values.
64.             configuration.TransportQuotas = new TransportQuotas();
65.             configuration.TransportQuotas.OperationTimeout = 360000;
66.             configuration.TransportQuotas.MaxStringLength = 67108864;
67.             configuration.TransportQuotas.MaxByteStringLength = 16777216; //Needed, i.e. for large TypeDictionarys
68.  
69.  
70.             // Step 4 - Specify the client specific configuration.
71.             configuration.ClientConfiguration = new ClientConfiguration();
72.             configuration.ClientConfiguration.DefaultSessionTimeout = 360000;
73.  
74.             // Step 5 - Validate the configuration.
75.             // This step checks if the configuration is consistent and assigns a few internal variables
76.             // that are used by the SDK. This is called automatically if the configuration is loaded from
77.             // a file using the ApplicationConfiguration.Load() method.
78.             configuration.Validate(ApplicationType.Client);
79.  
80.             return configuration;
81.         }
82.  
83.         /// <summary>Creats an EndpointDescription</summary>
84.         /// <param name="url">The endpoint url</param>
85.         /// <param name="security">Use security or not</param>
86.         /// <returns>The EndpointDescription</returns>
87.         /// <exception cref="Exception">Throws and forwards any exception with short error description.</exception>
88.         private static EndpointDescription CreateEndpointDescription(string url, string secPolicy, MessageSecurityMode msgSecMode)
89.         {
90.             // create the endpoint description.
91.             EndpointDescription endpointDescription = new EndpointDescription();
92.  
93.             // submit the url of the endopoint
94.             endpointDescription.EndpointUrl = url;
95.  
96.             // specify the security policy to use.
97.  
98.             endpointDescription.SecurityPolicyUri = secPolicy;
99.             endpointDescription.SecurityMode = msgSecMode;
100.  
101.             // specify the transport profile.
102.             endpointDescription.TransportProfileUri = Profiles.UaTcpTransport;
103.  
104.             return endpointDescription;
105.         }
106.  
107.         /// <summary>Gets the local IP addresses and the DNS name</summary>
108.         /// <returns>The list of IPs and names</returns>
109.         /// <exception cref="Exception">Throws and forwards any exception with short error description.</exception>
110.         private static List<string> GetLocalIpAddressAndDns()
111.         {
112.             List<string> localIps = new List<string>();
113.             var host = Dns.GetHostEntry(Dns.GetHostName());
114.             foreach (var ip in host.AddressList)
115.             {
116.                 if (ip.AddressFamily == AddressFamily.InterNetwork)
117.                 {
118.                     localIps.Add(ip.ToString());
119.                 }
120.             }
121.             if (localIps.Count == 0)
122.             {
123.                 throw new Exception("Local IP Address Not Found!");
124.             }
125.             localIps.Add(Dns.GetHostName());
126.             return localIps;
127.         }

 

Thank you very much for the quick answer! I've never edited assembly source code and I'm not sure where exactly in the class I should be looking. Could you point me to where these system libraries are being invoked? Here's a snippet of the class, I can take other screenshots of it.

 

This should be the dll in question.

 

Sorry for the late reply, I tried several ways to decompile the OpcUa.Core.dll and got a ton of compile errors every time. I did find the crypt32.dll references and fixed them, but I can't find a reliable way to decompile the dll without running into tons of messed up code I need to edit manually. I'm going with a different solution for my work in the meantime. Do you know of a reliable way to decompile the dll?

Really appreciate your help!