(Delphi ActiveX) Extract XML from FatturaPA .p7m

Demonstrates how to verify the signature and extract the XML from a FatturaPA .p7m file.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
bd: TChilkatBinData;
success: Integer;
crypt: TChilkatCrypt2;
bVerified: Integer;
xml: TChilkatXml;

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

bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/p7m/IT01879020517_abc.xml.p7m');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load the .p7m file');
    Exit;
  end;

crypt := TChilkatCrypt2.Create(Self);

// Verify and extrct the payload contained within the .p7m.
// In this case, the payload is the FatturaPA XML.
// If successful, the resulting bd will contain only the XML.
bVerified := crypt.OpaqueVerifyBd(bd.ControlInterface);
if (bVerified <> 1) then
  begin
    Memo1.Lines.Add(crypt.LastErrorText);
    Memo1.Lines.Add('Failed to extract and verify.');
    Exit;
  end;

// Save the XML to a file.
bd.WriteFile('qa_output/zIT01879020517_abc.xml');

// Alternatively, load into an XML object and emit.
xml := TChilkatXml.Create(Self);
xml.LoadXml(bd.GetString('utf-8'));

Memo1.Lines.Add(xml.GetXml());
end;