I want to use SharpSSH to upload a file to a SFTP server.
I got SharpSSH.dll, the file to upload, a public key and I sent the private key to the server. They gave me a username and no password is needed.
I tried this:
Sftp sftp = new Sftp(ip, user);
sftp.Connect();
sftp.Put(filePath, toPath);
sftp.Cancel();
Do I need a HostKey somewhere here and if yes, where would I have to put it in, and how do I make one out of a .ppk file?
First things first, your key terms are back-to-front, or at least I hope they are. You send the public key out, and keep the private key safe and secure.
Aside from that, yes, with SharpSSH you need to include the private key location.
sftp.AddIdentityFile("path/to/identity/file");
If your key has a password, then use the overloaded version, i.e.
sftp.AddIdentityFile("path/to/file", "password");
The key file itself, I believe, needs to be in OpenSSH format.
I'm also not sure about your inclusion of sftp.Cancel();
Would it not be better to enclose you connect and Put commands into a try/catch/finally block, and call sftp.close() within the finally block?
Here is a my solution:
using Tamir.SharpSsh;
using Tamir.SharpSsh.jsch;
Method code:
public static bool SftpFile(string ftpAddress, string username, string password, string port, string folderPath, string filename, string separator, string keyFilename, string keyPassword)
{
bool Success = false;
Sftp sftp = null;
try
{
if (filename.Length > 0 && dt != null)
{
//Send file
int NumberOfConnectionAttempts = 0;
JumpPoint:
try
{
sftp = new Sftp(ftpAddress, username);
sftp.Password = password;
sftp.AddIdentityFile(keyFilename, keyPassword);
// non-password alternative is sftp.AddIdentityFile(keyFilename);
sftp.Connect();
sftp.Put(filename + ".csv", (!String.IsNullOrWhiteSpace(folderPath) ? folderPath + "/" : "") + filename + ".csv");
Success = true;
}
catch (Exception ex)
{
Program.DisplayText(" Connection " + NumberOfConnectionAttempts + " failed.\n");
if (NumberOfConnectionAttempts < Program.IntTotalAllowedConnectionAttempts)
{
NumberOfConnectionAttempts++;
Thread.Sleep(1000);
goto JumpPoint;
}
else
{
//Program.HandleException(ex);
}
}
}
}
catch (Exception ex)
{
//Program.HandleException(ex);
}
finally
{
//Close sftp
try { sftp.Close(); }
catch { }
try { sftp = null; }
catch { }
try { GC.Collect(); }
catch { }
}
return Success;
}
Usage example:
string FtpAddress = "??.??.??.??";
string Port = "21";
string Username = "my-username";
string Password = "P455w0rd";
string FolderPath = "folder-name\\";
string Filename = "filename.foo";
string KeyFilename = "keyFilename.bar";
string KeyPassword= "K3yP455w0rd";
if (SftpFile(FtpAddress, Username, Password, Port, FolderPath, Filename, ",", KeyFilename, KeyPassword))
{
/* Success */
}
else
{
/* Error */
}
