How do I connect and download files from SFTP server with obfuscation password ASP.NET C#

Question

1.00/5 (2 votes)

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I have SFTP server which is able to connect via (Bitvise SSH client) with the help of Obfuscation Password. But, unable to connect the same via c# code.

Here is my code:

winSCPSrc.SessionOptions sessionOptionss = new winSCPSrc.SessionOptions();
sessionOptionss.Protocol = winSCPSrc.Protocol.Sftp;
sessionOptionss.PortNumber = Port;
sessionOptionss.HostName = Host;
sessionOptionss.UserName = Username;
if (!string.IsNullOrEmpty(Password))
{
sessionOptionss.Password = Password;
}
//sessionOptionss.GiveUpSecurityAndAcceptAnySshHostKey = true;
sessionOptionss.SshHostKeyFingerprint = fingerPrint;

using (winSCPSrc.Session session = new winSCPSrc.Session())
{
State.KPILog.Info(" SFTP Connection trying to Open ");
session.AddRawConfiguration("DefaultConfiguration", "false");
// Connect
session.Open(sessionOptionss);
State.KPILog.Info("SFTP Connection Open ");
winSCPSrc.TransferOptions transferOptions = new winSCPSrc.TransferOptions();
transferOptions.TransferMode = winSCPSrc.TransferMode.Binary;
// transferOptions.SpeedLimit = 100;
winSCPSrc.TransferOperationResult transferResult;

I'm getting "Server unexpectedly closed network connection" error while session.Open(sessionOptionss)

Please let me know there is any other dll available other than winscp to connect SFTP.

What I have tried:

Able to connect and download files via bitvise SSH client but unable to implement it in C# code.

Out IT provider has given some "Obfuscation Password" for connecting via bitvise ssh client. I have no idea how it works in c# code

Posted 19-Jul-21 1:27am

Member 15294207

Updated 19-Jul-21 21:26pm

v2

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Comments

Richard Deeming 19-Jul-21 7:44am

There's a secret error somewhere in your secret code. You need to fix that.

Seriously, how do you expect anyone to help you fix an error in code we can't see, when the only description of the problem is "it is not working"?!

Click the green "Improve question" link and update your question to include a proper description of the problem, the relevant parts of your code, and the full details of any error(s). If possible, include the relevant parts of the connection logs for the successful and failed connections, remembering to obfuscate any sensitive information.

Member 15294207 20-Jul-21 3:27am

Thanks for your response, i have updated question. May be now you will understand my situation.

SeeSharp2 19-Jul-21 8:08am

How can we help?

Member 15294207 20-Jul-21 3:28am

updated question with code

2 solutions

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Zdenek Sedlak · Answer 1 · 2021-07-19T03:51:00

Solution 1

It is a bad security practice to use SSH passwords, particularly for automation, use SSH keys instead.

Posted 19-Jul-21 3:51am

Zdenek Sedlak

SeeSharp2 · Answer 2 · 2021-07-20T01:13:00

Solution 2

I have used Renci.SSh.Net and it is very easy. More about this and some alternatives can be found here, c# - SFTP Libraries for .NET - Stack Overflow[^].

You may be using a wrong port number or wrong credentials or the url may be incorrect. Or it may require a certificate. No way for us to know.

Posted 20-Jul-21 1:13am

SeeSharp2

Updated 20-Jul-21 1:16am

Comments

Member 15294207 20-Jul-21 11:53am

I'm in a hectic situation of download files from bitvise SFTP server only, did not possible to use Renci.SSh. because SFTP server already setup using bitvise. only one option is to implement SFTP using FlowSsh library which owned by Bitvise

SeeSharp2 20-Jul-21 12:21pm

They must not support standard sftp then. Then you'll probably have to contact Bitvise. I've never heard of them.

Member 15294207 21-Jul-21 12:34pm

ok, thank you for the response