(PHP Extension) 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

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

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

// Get the private key from a pfx file.
$pfx = new CkPfx();
$success = $pfx->LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if ($success != true) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

// privKey is a CkPrivateKey
$privKey = $pfx->GetPrivateKey(0);
if ($pfx->get_LastMethodSuccess() == false) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

// Create IIC signature according to RSASSA-PKCS-v1_5 using SHA256
$rsa = new CkRsa();
$success = $rsa->ImportPrivateKeyObj($privKey);
if ($success == false) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

// PKCS-v1_5 is used by default.
$rsa->put_EncodingMode('hex');
$rsa->put_Charset('utf-8');
$hexSig = $rsa->signStringENC($concatenatedParams,'sha256');

print 'Signature value result is: ' . $hexSig . "\n";

// Compute the MD5 hash of the bytes.
$crypt = new CkCrypt2();
$crypt->put_EncodingMode('hex');
$crypt->put_HashAlgorithm('md5');
$bd = new CkBinData();
$bd->AppendEncoded($hexSig,'hex');
$md5_summary = $crypt->hashBdENC($bd);

print 'MD5 summary value is: ' . $md5_summary . "\n";


?>