Pascal (Lazarus/Delphi)

Authenticate an IMAP SSH Tunnel with a Password

Demonstrates the Chilkat Imap.SshAuthenticatePw method, which authenticates the SSH tunnel using a username and password. The first argument is the SSH login name and the second is the SSH password. Call SshOpenTunnel first; after SSH authentication succeeds, connect and log in to IMAP.

Background: This is SSH authentication, which is entirely separate from the IMAP login that follows — the SSH credentials belong to the tunnel/jump host, while the IMAP credentials belong to the mail account. Password authentication is the simplest option; use SshAuthenticatePk for key-based authentication, which is generally preferred for automated jobs.

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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.Imap;

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

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

begin
  success := False;

  //  Demonstrates the Imap.SshAuthenticatePw method, which authenticates the SSH tunnel with a
  //  username and password.  The 1st argument is the SSH login name and the 2nd is the SSH
  //  password.  Call SshOpenTunnel first.

  imap := TImap.Create;

  //  Open the SSH tunnel first.
  sshPort := 22;
  success := imap.SshOpenTunnel('ssh.example.com',sshPort);
  if (success = False) then
    begin
      WriteLn(imap.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.

  //  Authenticate the SSH tunnel (this is SSH authentication, separate from IMAP login).
  success := imap.SshAuthenticatePw('sshUser',sshPassword);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  With the SSH tunnel in place, connect and log in to the IMAP server as usual.  The IMAP
  //  traffic flows through the tunnel automatically.
  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;

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


  imap.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.