Get the Certificate Used to Decrypt an Email

See more Email Object Examples

Demonstrates the Chilkat Email.LastDecryptCert method, which copies the certificate used to decrypt this email into a Cert object. It should be called after a successful decryption. This example loads an encrypted email and, if it was decrypted, reads the decrypting certificate's common name.

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.Email,
  Chilkat.Cert;

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

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  cert: TCert;

begin
  success := False;

  //  Demonstrates the LastDecryptCert method, which copies the certificate used to decrypt
  //  this email into a Cert object.  Call it after a successful decryption.

  email := TEmail.Create;

  success := email.LoadEml('qa_data/eml/encrypted.eml');
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  if (email.ReceivedEncrypted = True) then
    begin
      if (email.Decrypted = True) then
        begin
          //  Get the certificate that was used to decrypt the email.
          cert := TCert.Create;
          success := email.LastDecryptCert(cert);
          if (success = True) then
            begin
              WriteLn('Decrypted with certificate (CN): ' + cert.SubjectCN);
            end;
        end;
    end;

  //  Note: The path "qa_data/..." is a relative local filesystem path,
  //  relative to the current working directory of the running application.


  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.