Pascal (Lazarus/Delphi)

SSH HSM Public Key Authentication

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Demonstrates how to authenticate with an SSH server using public key authentication using an HSM (USB token or smartcard). 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.Pkcs11,
  Chilkat.Ssh,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  pkcs11: TPkcs11;
  pin: string;
  userType: Integer;
  json: TJsonObject;
  priv_handle: LongWord;
  pub_handle: LongWord;
  key: TSshKey;
  keyType: string;
  ssh: TSsh;

begin
  success := False;

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

  //  Note: Chilkat's PKCS11 implementation runs on Windows, Linux, MacOs, and other supported operating systems.

  pkcs11 := TPkcs11.Create;

  //  This would be a path to a .dylib on MacOS, or a path to a .so shared lib on Linux.
  pkcs11.SharedLibPath := 'C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll';
  pin := '0000';
  userType := 1;

  //  Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
  success := pkcs11.QuickSession(userType,pin);
  if (success = False) then
    begin
      WriteLn(pkcs11.LastErrorText);
      Exit;
    end;

  //  Set PKCS11 attributes to find our desired private key object.
  json := TJsonObject.Create;
  json.UpdateString('class','private_key');
  json.UpdateString('label','MySshKey');

  //  Get the PKCS11 handle to the private key located on the HSM.
  priv_handle := pkcs11.FindObject(json);

  //  Get the PKCS11 handle to the corresponding public key located on the HSM.
  json.UpdateString('class','public_key');

  pub_handle := pkcs11.FindObject(json);

  key := TSshKey.Create;
  //  The key type can be "rsa" or "ec"
  keyType := 'rsa';
  success := key.UsePkcs11(pkcs11,priv_handle,pub_handle,keyType);
  if (success = False) then
    begin
      WriteLn(key.LastErrorText);
      Exit;
    end;

  ssh := TSsh.Create;

  success := ssh.Connect('example.com',22);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Authenticate with the SSH server using the login and
  //  HSM private key.  (The corresponding public key should've 
  //  been installed on the SSH server beforehand.)
  success := ssh.AuthenticatePk('myLogin',key);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  WriteLn('Public-Key Authentication Successful!');


  pkcs11.Free;
  json.Free;
  key.Free;
  ssh.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.