Pascal (Lazarus/Delphi)

SSH Authentication using an SSH Certificate

See more SSH Examples

Demonstrates how to authenticate using an SSH certificate. 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.StringBuilder,
  Chilkat.Ssh;

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

procedure RunDemo;
var
  success: Boolean;
  sbSshCert: TStringBuilder;
  sbPrivKey: TStringBuilder;
  key: TSshKey;
  ssh: TSsh;
  hostname: string;
  port: Integer;

begin
  success := False;

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

  sbSshCert := TStringBuilder.Create;
  success := sbSshCert.LoadFile('qa_data/sshCert/user_ecdsa_key-cert.pub','utf-8');
  if (success = False) then
    begin
      WriteLn('Failed to load user_ecdsa_key-cert.pub');
      Exit;
    end;

  sbPrivKey := TStringBuilder.Create;
  success := sbPrivKey.LoadFile('qa_data/sshKeys/user_ecdsa_key','utf-8');
  if (success = False) then
    begin
      WriteLn('Failed to load user_ecdsa_key');
      Exit;
    end;

  key := TSshKey.Create;
  //  Provide the password if the user_ecdsa_key is stored in an encrypted format.
  key.Password := 'secret';
  success := key.FromOpenSshPrivateKey(sbPrivKey.GetAsString());
  if (success = False) then
    begin
      WriteLn(key.LastErrorText);
      Exit;
    end;

  //  Indicate that the SSH certificate is to be used for authentication.
  //  The UseSshCertificate method was added in Chilkat v11.0.0
  key.UseSshCertificate(sbSshCert.GetAsString());

  ssh := TSsh.Create;

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

  success := ssh.AuthenticatePk('myLogin',key);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  WriteLn('Public-Key Authentication using an SSH Certificate was Successful!');


  sbSshCert.Free;
  sbPrivKey.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.