Use a PuTTY Key for SSH Authentication

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Demonstrates authenticating with an SSH server using a username and a PuTTY (.ppk) private key. The key is imported with FromPuttyPrivateKey — setting Password first if it is encrypted — and passed to AuthenticatePk.

Note: The file paths are relative to the application's current working directory. Supply the paths to your own files.

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  Demonstrates authenticating with an SSH server using a username and a PuTTY (.ppk) private
//  key.  The private key serves as the credential; the username identifies the account on the
//  server.

Chilkat.Ssh ssh = new Chilkat.Ssh();

//  LoadText is a convenience method that reads any text file into a string.  It does not itself
//  load the key.
Chilkat.SshKey puttyKey = new Chilkat.SshKey();
string ppkText = puttyKey.LoadText("qa_data/ppk/putty_private_secret.ppk");
if (puttyKey.LastMethodSuccess == false) {
    Debug.WriteLine(puttyKey.LastErrorText);
    return;
}

//  Set the password before importing an encrypted .ppk.  This should come from a secure source
//  rather than being hard-coded.
puttyKey.Password = "myKeyPassword";

success = puttyKey.FromPuttyPrivateKey(ppkText);
if (success == false) {
    Debug.WriteLine(puttyKey.LastErrorText);
    return;
}

string sshHostname = "ssh.example.com";
int sshPort = 22;
success = ssh.Connect(sshHostname,sshPort);
if (success == false) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

//  The corresponding public key must already be installed on the SSH server for the account.
success = ssh.AuthenticatePk("mySshLogin",puttyKey);
if (success == false) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

Debug.WriteLine("Connection and authentication with the SSH server completed.");

ssh.Disconnect();