Pascal (Lazarus/Delphi)

Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

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.Email;

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

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

begin
  success := False;

  email := TEmail.Create;

  //  Add a PFX (or .p12) to be used for decryption
  success := email.AddPfxSourceFile('myCert.p12','passwordForP12');
  if (success <> True) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Loading the .eml automatically decrypts.
  success := email.LoadEml('encrypted.eml');
  if (success <> True) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  The email now exists as it was prior to encryption.
  //  Your app may access the email's subject, body, attachments,
  //  etc. using the Chilkat Email API...

  //  Save the decrypted email:
  success := email.SaveEml('decrypted.eml');
  if (success <> True) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  WriteLn('Success.');


  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.