Pascal (Lazarus/Delphi)

Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted email. 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.Cert,
  Chilkat.Email;

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

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  email: TEmail;
  recipientEmailAddr: string;
  cert: TCert;

begin
  success := False;

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

  mailman := TMailMan.Create;

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

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

  email.Subject := 'This email is encrypted';
  email.Body := 'This is a digitally encrypted mail';
  email.From := 'Joe <joe@example.com>';
  //  Emails are encrypted using the recipient's certificate.
  recipientEmailAddr := 'jane@example2.com';
  email.AddTo('Jane',recipientEmailAddr);

  //  Indicate that the email is to be sent encrypted.
  email.SendEncrypted := True;

  //  This example demonstrates finding the email encryption certificate
  //  on a Windows system where the certificate is stored in the Windows 
  //  certificate store.

  cert := TCert.Create;
  //  The recipient's certificate is used to encrypt.
  //  (Because the recipient is the only one in possession of the private key to decrypt.)
  success := cert.LoadByEmailAddress(recipientEmailAddr);
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Specify the certificate to be used for encryption.
  success := email.SetEncryptCert(cert);

  success := mailman.SendEmail(email);
  if (success <> True) then
    begin
      WriteLn(mailman.LastErrorText);
    end
  else
    begin
      WriteLn('Encrypted Mail Sent!');
    end;


  mailman.Free;
  email.Free;
  cert.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.