Method reduce

src/main/java/utils/Hash.java:35–38

Shrink the hash to a value 0..n. Kind of like modulo, but using multiplication and shift, which are faster to compute. @param hash the hash @param n the maximum of the result @return the reduced value

(int hash, int n)

     * @return the reduced value
     */
    public static int reduce(int hash, int n) {
        // http://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
        return (int) (((hash & 0xffffffffL) * n) >>> 32);
    }

    public static byte[]  Get_SHA_256(byte[] passwordToHash) {
        try {