Issue While Connecting to SFTP Using Private Key - Error :'Renci.SshNet.SshNetLoggingConfiguration'

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Posted on by Saran S

331

Hi experts,

I'm trying to connect SFTP server from D365 FO using a username and a private key. The private key was generated using an SSH key.

I'm using C# Code and Renci.SshNet and SSH.NET as a reference in my code. However, while attempting to connect to the server, I'm encountering the following error:
"The type initializer for 'Renci.SshNet.SshNetLoggingConfiguration' threw an exception."

I couldn’t find any relevant blogs or posts addressing this issue. Has anyone faced this error before or have any idea why this might be occurring? Any guidance or solution would be appreciated.

Below is my C# code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Renci.SshNet;
using Renci.SshNet.Sftp;
using System.IO;
using System.Net;

namespace SFTPConnection
{
    public class SFTPConnectionAndUploadFile
    {
        public static SftpClient ConnectFTP(
          string host,
          string userName,
          string privateKeyPath,
          string KeyFilePassCode,
          int port = 22)
        {
            SftpClient sftpClient = (SftpClient)null;
            try
            {
                PrivateKeyFile privateKeyFile = new PrivateKeyFile(privateKeyPath, KeyFilePassCode);
                sftpClient = new SftpClient(new ConnectionInfo(host, port, userName, new AuthenticationMethod[1] //Got error in this line
                {
          (AuthenticationMethod) new PrivateKeyAuthenticationMethod(userName, new IPrivateKeySource[1]
          {
            (IPrivateKeySource) privateKeyFile
          })
                })); 
                ((BaseClient)sftpClient).Connect();
                return sftpClient;
            }
            catch (Exception ex)
            {
                Console.WriteLine("An error occurred: " + ex.Message);
                ((BaseClient)sftpClient)?.Dispose();
                return (SftpClient)null;
            }
        }
        public static SftpClient ConnectFTP(
          string host,
          string userName,
          Stream privateKey,
          string KeyFilePassCode,
          int port = 22)
        {
            SftpClient sftpClient = (SftpClient)null;
            try
            {
                //PrivateKeyFile privateKeyFile = new PrivateKeyFile(privateKeyPath, KeyFilePassCode);
                PrivateKeyFile privateKeyFile = new PrivateKeyFile(privateKey, KeyFilePassCode);
                sftpClient = new SftpClient(new ConnectionInfo(host, port, userName, new AuthenticationMethod[1] //Got error in this line
                {
          (AuthenticationMethod) new PrivateKeyAuthenticationMethod(userName, new IPrivateKeySource[1]
          {
            (IPrivateKeySource) privateKeyFile
          })
                }));
                ((BaseClient)sftpClient).Connect();
                return sftpClient;
            }
            catch (Exception ex)
            {
                Console.WriteLine("An error occurred: " + ex.Message);
                ((BaseClient)sftpClient)?.Dispose();
                return (SftpClient)null;
            }
        }
    }
}

Below is my X++ code:

using SFTPConnection;
using Renci.SshNet;
class EncryptTest
{
    public static void main(Args args)
    {
        System.Exception ex;
        Renci.SshNet.SftpClient sftpClient;
        str connectionStatus;
        
        sftpClient = SFTPConnection.SFTPConnectionAndUploadFile::ConnectFTP('100.100.100.10', 'xxyyzz', "C:\Users\Admin\id_rsa", 'XXYYZZ', 22);
        sftpClient.Connect();
        if (sftpClient.IsConnected)
            connectionStatus = 'Connected';
        else
        connectionStatus = 'Not Connected';
        
        Info(connectionStatus);
    }
}

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Dynamics 365 Finance

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Saalim Ansari 689 on at

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Hello,

I faced a similar issue when using Renci.SshNet with SSH key authentication in D365 FO. The error often comes from using an incompatible or newer version of SSH.NET. Try downgrading to version 2016.1.0, which is stable and works well with D365FO's supported .NET versions.

Also, here's a great step-by-step blog that shows how to connect and upload files using either SSH key or username/password from D365 FO via X++ and C#:

🔗 https://harinmpatel.hashnode.dev/upload-a-file-on-sftp-server-using-ssh-key-or-usernamepassword-in-d365-using-x-part-1

Hope it helps!
Saalim

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Martin Dráb 239,040 Most Valuable Professional on at

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Does your code works when executed directly in a C# console application or so? If not, then we don't need to complicate the discussion by adding F&O there at all, because it's not really related to it.

If it works there but in F&O, you know that the code is find and you need to look for the problem somewhere else.

The usage of a path to use user profile looks suspicious. Are you sure that the service account (running the web server) has permissions to access this file? You won't be able to use such an approach in the real solution anyway, so maybe you could already design something more suitable for cloud.

Also, your error handling logic may hide important information about the exception: the type, the stack trace, inner exceptions and all properties except of Message. I suggest you stop handling the exceptions for now or you debug the C# code to see the original exception.

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Saran S 331 on at

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Hi @Saalim Ansari,

Thanks for the info.

I tried downgrading the SSH.NET version to 2016.1.0 version,

here i got error like below in the same code

so I changed my code to this

List<AuthenticationMethod> authenticationMethodList; PrivateKeyFile privateKeyFile = new PrivateKeyFile(privateKeyPath, passphrase); authenticationMethodList = new List<AuthenticationMethod>() { (AuthenticationMethod) new PrivateKeyAuthenticationMethod(username, new PrivateKeyFile[1] { privateKeyFile }) }; string str; try { using (SftpClient sftpClient = new SftpClient(new ConnectionInfo(host, port, username, authenticationMethodList.ToArray()))) { sftpClient.Connect(); str = "SFTP Server connected."; } }

here the error is not return, but while running the code got the below error

Method not found: 'Void Renci.SshNet.PrivateKeyAuthenticationMethod..ctor(System.String, Renci.SshNet.PrivateKeyFile[])'.

Have any suggestion.

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Saran S 331 on at

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Hi @Martin,

Thanks for the info.

1. Code works when executed directly in a C# console application.

2. I tried to connect with SFTP server using FileZilla it works fine and also Command prompt too.

3. I get the above error while debugging. (For your reference)

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Martin Dráb 239,040 Most Valuable Professional on at

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You need to develop against the version used by F&O. Downloading a different version and developing against it (without using it in F&O) means that, for example, you may be using methods in code that do not exist at runtime. The assembly then either fails to load or it'll end up with a runtime exception (as in your case).

Make sure that version you use for development match the version you've installed to F&O. I think that Renci.SshNet isn't included by default, therefore I'm assuming that you've installed it by yourself.

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