<?php

class Aes128CBCEncryptor
{
    const METHOD = 'aes-128-cbc';
    const BLOCK_SIZE = 16;
    const KEY_TOKEN = 'klucz szyfrujacy';
    const IV = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";

    public static function getKey()
    {
        return sha1(self::KEY_TOKEN);
    }

    public static function encrypt($text)
    {
        return openssl_encrypt($text, self::METHOD, self::getKey(), OPENSSL_RAW_DATA, self::IV);
    }

    public static function decrypt($text)
    {
        return openssl_decrypt($text, self::METHOD, self::getKey(),OPENSSL_RAW_DATA, self::IV);
    }

    public static function paddingOracleCheck($cipheredText)
    {
        $text = self::decrypt($cipheredText);
        return boolval($text);
    }
}