SFTP SSH.NET DLL instead of SharpSSH

Question

I was seeking for a free DLL for .net to handle SFTP connections.

I found out this project SharpSSH, but it lacks of documentation.

I spent a lot of time to figure how the dll works. I created a test project and I started to test different functions. Some functions are working such as deleting files.

I have a problem with putfile() function and getfile().

Here an example :

Dim ssh As SFTPUtil
ssh = New SFTPUtil("MY SERVER", "MY USER", "MY PW")
ssh.GetFile("/home/sftptest/test111.xml", "C:\\text.xml")

Note that the getfile() parameters are:

Public Sub GetFile(remotePath As String, localPath As String)

I step in the functions, but I didn't get the correct way to pass those parameters.

I dont really know if i should use slashes(/) or backslashes (). I know that Linux uses (/)

I noticed for example that the "C:\" has been transformed to "C:\\".

Just to mention that the SFTP is on a linux machine.

thank you.

Answer 1

This library is full of bugs. I downloaded version at 11/2012 and I have big problem even with simple function like Disconnect. Application will freeze and you have to restart it.

Answer 2

Here's What I should have done (vb.net code) to establish the connection with THIS library (SSHnet), I did not use SharpSHH:

Private Sub ButtonAction_Click(sender As Object, e As System.EventArgs) Handles ButtonAction.Click

    Dim PasswordConnection = New PasswordAuthenticationMethod("test", "test")
    Dim KeyboardInteractive = New KeyboardInteractiveAuthenticationMethod("test")
    Dim ConnectionInfo = New ConnectionInfo("192.168.1.1", 22, "test", PasswordConnection, KeyboardInteractive)

    AddHandler KeyboardInteractive.AuthenticationPrompt, _
    Sub(_sender As Object, _e As Renci.SshNet.Common.AuthenticationPromptEventArgs)
        For Each prompt In _e.Prompts
            Debug.Print(prompt.Request)
            If Not prompt.Request.IndexOf("Password:", StringComparison.InvariantCultureIgnoreCase) = -1 Then
                prompt.Response = "test"
            End If
        Next
    End Sub

    sftp = New SftpClient(ConnectionInfo)
    sftp.Connect()

    sftp.disconnect()
End Sub

Answer 3

I have some problem understanding what exactly you want so here is an example code from the SSH.NET package. (NOT SharpSSH)

string IP = "192.168.1.1", User = "Testuser", Pass = "123";
SftpClient sftp;

private void UploadFileSFTP()
    {
        sftp = new SftpClient(IP, User, Pass);
        sftp.Connect();
        Uploader();
        Downloader();
        sftp.Disconnect();
    }

string FilePath="C:\\folder\\", Filename = "Filename.extention", 
       DeliveryPath = "/tmp/";

private void Uploader()
    {
        using (var file = File.OpenRead(FilePath + Filename))
        {
            sftp.UploadFile(file, DeliveryPath + Filename);
        }
    }

//there is possibly a simpler way to download but this is how i did it.
string FromPath = "/tmp/testfile.txt", StoragePath = ""; 
private void Downloader()
    {
        if (File.Exists(StoragePath))
            File.Delete(StoragePath);
        if (!Directory.GetDirectories(Path.GetTempPath()).Contains("WorkFiles"))
        {
            Directory.CreateDirectory(Path.GetTempPath() + "WorkFiles");
        }

        StoragePath = Path.GetTempPath() + "WorkFiles\\testFile.txt";

        Int64 iSize = sftp.ReadAllBytes(FromPath).Length;
        Int64 iRunningByteTotal = 0;
        using (Stream streamRemote = sftp.OpenRead(FromPath))
        {
            using (Stream streamLocal = new FileStream(StoragePath, FileMode.Create, FileAccess.Write, FileShare.None))
            {
                int iByteSize = 0;
                byte[] byteBuffer = new byte[iSize];
                while ((iByteSize = streamRemote.Read(byteBuffer, 0, byteBuffer.Length)) > 0)
                {
                    streamLocal.Write(byteBuffer, 0, iByteSize);
                    iRunningByteTotal += iByteSize;
                }
            }
        }
    }