(Node.js) IKOF Generation Code for Montenegro Fiscalization Service

Demonstrates computing the IKOF MD5 summary value as described in section 4.3 of this document: https://poreskauprava.gov.me/ResourceManager/FileDownload.aspx?rId=416042&rType=2

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 concatenatedParams = "12345678|2019-06-12T17:05:43+02:00|9952|bb123bb1231|cc123cc1231|ss123ss123|199.01";

    // Get the private key from a pfx file.
    var pfx = new chilkat.Pfx();
    var success = pfx.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
    if (success !== true) {
        console.log(pfx.LastErrorText);
        return;
    }

    // privKey: PrivateKey
    var privKey = pfx.GetPrivateKey(0);
    if (pfx.LastMethodSuccess == false) {
        console.log(pfx.LastErrorText);
        return;
    }

    // Create IIC signature according to RSASSA-PKCS-v1_5 using SHA256
    var rsa = new chilkat.Rsa();
    success = rsa.ImportPrivateKeyObj(privKey);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // PKCS-v1_5 is used by default.
    rsa.EncodingMode = "hex";
    rsa.Charset = "utf-8";
    var hexSig = rsa.SignStringENC(concatenatedParams,"sha256");

    console.log("Signature value result is: " + hexSig);

    // Compute the MD5 hash of the bytes.
    var crypt = new chilkat.Crypt2();
    crypt.EncodingMode = "hex";
    crypt.HashAlgorithm = "md5";
    var bd = new chilkat.BinData();
    bd.AppendEncoded(hexSig,"hex");
    var md5_summary = crypt.HashBdENC(bd);

    console.log("MD5 summary value is: " + md5_summary);


}

chilkatExample();