Pascal (Lazarus/Delphi)

Send Encrypted Email using Certificate in Apple Keychain

See more Apple Keychain Examples

Send encrypted (S/MIME) email using a certificate found in the Apple Keychain.

Note: This example requires Chilkat v10.1.2 or later.

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.Secrets,
  Chilkat.Cert,
  Chilkat.Email,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  recipientEmailAddr: string;
  cert: TCert;
  mailman: TMailMan;
  secrets: TSecrets;
  json: TJsonObject;

begin
  success := False;

  email := TEmail.Create;
  email.Subject := 'This email is encrypted';
  email.Body := 'This is a S/MIME encrypted mail';
  email.From := 'Joe <joe@example.com>';

  //  Emails are encrypted using the recipient's certificate.
  recipientEmailAddr := 'jane@example2.com';
  email.AddTo('',recipientEmailAddr);

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

  cert := TCert.Create;

  //  -----------------------------------------------
  //  This example requires Chilkat v10.1.2 or later.
  //  -----------------------------------------------

  //  The recipient's certificate is used to encrypt.
  //  This will load the certificate from the Apple Keychain.
  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);
  email.SendEncrypted := True;

  mailman := TMailMan.Create;
  mailman.SmtpHost := 'smtp.example.com';
  mailman.SmtpUsername := 'joe@example.com';
  mailman.SmtpPort := 587;
  mailman.StartTLS := True;

  //  We'll get the SMTP password from the Apple Keychain.
  //  See how we originally saved the email credentials to the Keychain here:
  //  Save Email Credentials in Apple Keychain or Windows Credentials Manager
  secrets := TSecrets.Create;

  //  On Windows, this is the Windows Credentials Manager
  //  On MacOS/iOS, it is the Apple Keychain
  secrets.Location := 'local_manager';

  //  Specify the name of the secret.
  //  service and username are required.
  //  appName and domain are optional.
  //  Note: The values are arbitrary and can be anything you want.
  json := TJsonObject.Create;
  json.UpdateString('appName','MyEmailApp');
  json.UpdateString('service','SMTP');
  json.UpdateString('domain','example.com');
  json.UpdateString('username','joe@example.com');

  mailman.SmtpPassword := secrets.GetSecretStr(json);

  //  Send the encrypted email.
  //  The email is encrypted and sent within the SendEmail function.
  success := mailman.SendEmail(email);
  if (success <> True) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  WriteLn('Encrypted email sent!');


  email.Free;
  cert.Free;
  mailman.Free;
  secrets.Free;
  json.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.