Pascal (Lazarus/Delphi)

Send Signed Email using PFX File

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file. 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.MailMan,
  Chilkat.Email;

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

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  email: TEmail;

begin
  success := False;

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

  //  The mailman object is used for sending and receiving email.
  mailman := TMailMan.Create;

  //  Set the SMTP server.
  mailman.SmtpHost := 'smtp.mymailserver.com';

  //  Create a new email object
  email := TEmail.Create;

  email.Subject := 'This email is signed';
  email.Body := 'This is a digitally signed mail';
  email.From := 'Chilkat Admin <admin@chilkatsoft.com>';
  success := email.AddTo('Chilkat Support','support@chilkatsoft.com');

  //  Indicate that the email should be sent signed.
  email.SendSigned := True;

  //  Tell the mailman to use a PFX file as a source for locating
  //  the certificate and private key required for signing.
  //  The certificate chosen for signing will be the one that
  //  matches the sender's email address, which also has
  //  a private key.  All intermediate certs in the chain of 
  //  authentication, up to and including the root, will
  //  be included in the signature.
  success := mailman.AddPfxSourceFile('/pfx_files/chilkatsoft_secret.pfx','secret');
  if (success <> True) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  //  Signed email can be sent in two different ways.  
  //  In a multipart/signed email, the signature is attached as a separate MIME part.
  //  In an opaque email (signedData) the content of the email is encapsulated within the signature
  //  and the email is sent as "application/pkcs7-mime". 
  //  Either should be fine, but some receiving systems might require one or the other..
  mailman.OpaqueSigning := False;

  //  Send a signed email.
  success := mailman.SendEmail(email);
  if (success <> True) then
    begin
      WriteLn(mailman.LastErrorText);
    end
  else
    begin
      //  The LastErrorText property provides information
      //  even when successful.
      WriteLn(mailman.LastErrorText);
      WriteLn('Mail Sent!');
    end;


  mailman.Free;
  email.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.