Fiskalizacija - Zaštitni kod

gistfile1.php

<?php

public function getZastKod($fiscalInvoice, $store, $invoice = null)
{
    if ($invoice === null) {
        $invoice = Mage::getModel('sales/order_invoice');
        $invoice->load($fiscalInvoice->getInvoiceEntityId());
    }
    
    $cert = Mage::getModel('inchoo_fiskalizacija/cert');
    $cert->load(Mage::getModel('core/store')->load($store)->getWebsiteId(), 'website_id');
    
    $oib = $this->getOib();
    $datumVrijemeIzdavanjaRacuna = date('d.m.Y H:i:s', strtotime($fiscalInvoice->getCreatedAt()));
    $brojcanaOznakaRacuna = $fiscalInvoice->getId();
    $oznakaPoslovnogProstora = $this->getPoslovniProstorOznPoslProstora();
    $oznakaNaplatnogUredaja = $this->getOznNapUr();
    $ukupniIznosRacuna = number_format($invoice->getGrandTotal(), '2', '.', '');
    
    $medjurezultat = $oib;
    $medjurezultat .= $datumVrijemeIzdavanjaRacuna;
    $medjurezultat .= $brojcanaOznakaRacuna;
    $medjurezultat .= $oznakaPoslovnogProstora;
    $medjurezultat .= $oznakaNaplatnogUredaja;
    $medjurezultat .= $ukupniIznosRacuna;
    
    /* $medjurezultat => something like "7934368740720.12.2012 11:14:101MAGE11567.5" */

    $signature = "";

    $pkeyid = openssl_get_privatekey($cert->getPemPrivateKey(), $cert->getPemPrivateKeyPassphrase());
    
    openssl_sign($medjurezultat, $signature, $pkeyid, OPENSSL_ALGO_SHA1);
    openssl_free_key($pkeyid);

    $zastitniKod = md5($signature);        
    
    return $zastitniKod;
}