vrkorada wrote:

Is there any API for checking the availability of the key in the cache

No.

and if it not available, any API to get eh server's host key?

You should not automate this. It would spoil security purpose of the verification.
Anyway, if you do not care about security, you can accept any host key with SessionOptions.GiveUpSecurityAndAcceptAnySshHostKey:
https://winscp.net/eng/docs/library_sessionoptions

Hi,
With WinSCP UI / plink, when we connect to a host for hte first time, we get a prompt saying server's host key is not in cache and asking the confirmation to continue with caching hte key.

Is there any API for checking the availability of the key in the cache and if it not available, any API to get eh server's host key?

Regards,
Venkat

vrkorada wrote:

When I use the GUI tool WinSCP, it never asks me the host key and I never provided hostkey to plink also.

Both WinSCP GUI and plink/PuTTY ask for host key verification on the first connect.

See also https://winscp.net/eng/docs/faq_hostkey

Hi,
Thanks for reply. Rawsettings option is working. However, now I am getting error asking to set the hostkey.

Here is the snippet:

try
{
// Setup session options
SessionOptions sessionOptions = new SessionOptions
{
Protocol = Protocol.Scp,
HostName = "host03.company.com",
UserName = "venkat",
//Password = "mypassword",
//SshHostKeyFingerprint = "ssh-rsa 1024 xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx"
};
sessionOptions.AddRawSettings("AuthGSSAPI","1");
sessionOptions.AddRawSettings("SshProt", "2");
using (Session session = new Session())
{
// Connect
session.Open(sessionOptions);
}
return 0;
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e);
return 1;
}

When I use the GUI tool WinSCP, it never asks me the host key and I never provided hostkey to plink also.
Am I missing something here?

Regards,
Venkat

Please read documentation:
https://winscp.net/eng/docs/rawsettings

If that does not help, come back.

Hi,
Sorry for not clear in my question. I am looking for a .net library, so that I can use it in my application.
I couldn't find any option to use the same advanced settings to enable GSSAPI authentication.
Am I missing something? Can you share a code snippet to set the GSSAPI?

Regards,
Venkat

WinSCP supports GSSAPI too:
https://winscp.net/eng/docs/ui_login_authentication

Hi,
I want to connect to unix hoist from my windows7 desktop and execute remote commands. I am able to do using Quest putty/ plink without typing any password using GSSAPI. However, Can I do the same using WinSCP?

Regards,
Venkat