(Node.js) Extract XML from FatturaPA .p7m

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

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    var bd = new chilkat.BinData();
    var success = bd.LoadFile("qa_data/p7m/IT01879020517_abc.xml.p7m");
    if (success !== true) {
        console.log("Failed to load the .p7m file");
        return;
    }

    var crypt = new chilkat.Crypt2();

    // 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.
    var bVerified = crypt.OpaqueVerifyBd(bd);
    if (bVerified !== true) {
        console.log(crypt.LastErrorText);
        console.log("Failed to extract and verify.");
        return;
    }

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

    // Alternatively, load into an XML object and emit.
    var xml = new chilkat.Xml();
    xml.LoadXml(bd.GetString("utf-8"));

    console.log(xml.GetXml());

}

chilkatExample();