(Delphi ActiveX) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ssh: TChilkatSsh;
hostname: WideString;
port: Integer;
success: Integer;
key: TChilkatSshKey;
privKey: WideString;

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

ssh := TChilkatSsh.Create(Self);

// Set some timeouts, in milliseconds:
ssh.ConnectTimeoutMs := 5000;
ssh.IdleTimeoutMs := 15000;

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
hostname := 'sftp.example.com';
port := 22;
success := ssh.Connect(hostname,port);
if (success <> 1) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

key := TChilkatSshKey.Create(Self);

// Read the PEM file into a string variable:
// (This does not load the PEM file into the key.  The LoadText
// method is a convenience method for loading the full contents of ANY text
// file into a string variable.)
privKey := key.LoadText('myPrivateKey.pem');
if (key.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(key.LastErrorText);
    Exit;
  end;

// Load a private key from a PEM string:
// (Private keys may be loaded from OpenSSH and Putty formats.
// Both encrypted and unencrypted private key file formats
// are supported.  This example loads an unencrypted private
// key in OpenSSH format.  PuTTY keys typically use the .ppk
// file extension, while OpenSSH keys use the PEM format.
// (For PuTTY keys, call FromPuttyPrivateKey instead.)
success := key.FromOpenSshPrivateKey(privKey);
if (success <> 1) then
  begin
    Memo1.Lines.Add(key.LastErrorText);
    Exit;
  end;

// Authenticate with the SSH server using the login and
// private key.  (The corresponding public key should've 
// been installed on the SSH server beforehand.)
success := ssh.AuthenticatePk('myLogin',key.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(ssh.LastErrorText);
Memo1.Lines.Add('Public-Key Authentication Successful!');
end;