Share an Existing SSH Tunnel (Socket) with IMAP

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Demonstrates the Chilkat Imap.UseSshTunnel method, which uses an existing SSH tunnel, represented by a Socket object, for IMAP connections. The only argument is the Socket. Call it before Connect. This example opens and authenticates the tunnel on a Socket, then routes IMAP through it.

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.Imap,
  Chilkat.Socket;

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

procedure RunDemo;
var
  success: Boolean;
  imap: TImap;
  sshTunnel: TSocket;
  sshPort: Integer;
  sshPassword: string;

begin
  success := False;

  //  Demonstrates the Imap.UseSshTunnel method, which uses an existing SSH tunnel (represented by
  //  a Socket) for IMAP connections.  The only argument is the Socket.  Call it before Connect.

  imap := TImap.Create;

  //  Open and authenticate an SSH tunnel on a Socket object.  This tunnel can be shared with
  //  other Chilkat objects.
  sshTunnel := TSocket.Create;
  sshPort := 22;
  success := sshTunnel.SshOpenTunnel('ssh.example.com',sshPort);
  if (success = False) then
    begin
      WriteLn(sshTunnel.LastErrorText);
      Exit;
    end;

  //  The SSH password is not hard-coded in source.  Insert code here to obtain it from an
  //  interactive prompt, environment variable, or a secrets vault.

  success := sshTunnel.SshAuthenticatePw('sshUser',sshPassword);
  if (success = False) then
    begin
      WriteLn(sshTunnel.LastErrorText);
      Exit;
    end;

  //  Tell the Imap object to use the existing tunnel.
  success := imap.UseSshTunnel(sshTunnel);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Now connect and log in to the IMAP server through the tunnel.
  imap.Ssl := True;
  imap.Port := 993;
  success := imap.Connect('imap.example.com');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;
  success := imap.Login('user@example.com','myPassword');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  success := imap.Disconnect();
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;


  imap.Free;
  sshTunnel.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.