Pascal (Lazarus/Delphi)

SFTP use Cert's Private Key for Authentication (Windows)

See more SFTP Examples

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.SshKey,
  Chilkat.PrivateKey,
  Chilkat.Cert,
  Chilkat.SFtp;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  cert: TCert;
  privKey: TPrivateKey;
  privKeyPem: string;
  sshKey: TSshKey;
  sftp: TSFtp;

begin
  success := False;

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

  cert := TCert.Create;

  //  Load the certificate from the Windows certificate store
  success := cert.LoadByCommonName('my_cert_common_name');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Get the private key.  
  privKey := TPrivateKey.Create;
  success := cert.GetPrivateKey(privKey);
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  privKeyPem := privKey.GetPkcs8Pem();
  if (privKey.LastMethodSuccess = False) then
    begin
      WriteLn(privKey.LastErrorText);
      Exit;
    end;

  sshKey := TSshKey.Create;
  success := sshKey.FromOpenSshPrivateKey(privKeyPem);
  if (success = False) then
    begin
      WriteLn(sshKey.LastErrorText);
      Exit;
    end;

  //  Connect to an SSH/SFTP server
  sftp := TSFtp.Create;
  success := sftp.Connect('sftp.example.com',22);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Authenticate with the SSH server using a username + private key.
  //  (The private key serves as the password.  The username identifies
  //  the SSH user account on the server.)
  success := sftp.AuthenticatePk('mySshLogin',sshKey);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  WriteLn('OK, the connection and authentication with the SSH server is completed.');

  //  This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...


  cert.Free;
  privKey.Free;
  sshKey.Free;
  sftp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.