Delphi ActiveX

Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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var
success: Integer;
ssh: TChilkatSsh;
sshPort: Integer;
methods: WideString;

begin
success := 0;

//  Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
//  server for the authentication methods it advertises.  It takes no arguments and returns a
//  lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

ssh := TChilkatSsh.Create(Self);

//  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort := 22;
success := ssh.Connect('ssh.example.com',sshPort);
if (success = 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

//  Query the advertised authentication methods.  Call after Connect, before authenticating.
methods := ssh.GetAuthMethods();
if (ssh.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('Server auth methods: ' + methods);

ssh.Disconnect();