package org.bouncycastle.util;import java.math.BigInteger;/** * BigInteger utilities. */public final class BigIntegers{    /**     * Return the passed in value as an unsigned byte array.     *      * @param value value to be converted.     * @return a byte array without a leading zero byte if present in the signed encoding.     */    public static byte[] asUnsignedByteArray(        BigInteger value)    {        byte[] bytes = value.toByteArray();                if (bytes[0] == 0)        {            byte[] tmp = new byte[bytes.length - 1];                        System.arraycopy(bytes, 1, tmp, 0, tmp.length);                        return tmp;        }                return bytes;    }}