/*
import java.security.MessageDigest;
import java.security.SecureRandom;
*/



/**
 * Updated Utility class
 */
public class Utils
{
    private static String	digits = "0123456789abcdef";
    
    /**
     * Return length many bytes of the passed in byte array as a hex string.
     * 
     * @param data the bytes to be converted.
     * @param length the number of bytes in the data block to be converted.
     * @return a hex representation of length bytes of data.
     */
    public static String toHex(byte[] data, int length)
    {
        StringBuffer	buf = new StringBuffer();
        
        for (int i = 0; i != length; i++)
        {
            int	v = data[i] & 0xff;
            
            buf.append(digits.charAt(v >> 4));
            buf.append(digits.charAt(v & 0xf));
        }
        
        return buf.toString();
    }
    
    /**
     * Return the passed in byte array as a hex string.
     * 
     * @param data the bytes to be converted.
     * @return a hex representation of data.
     */
    public static String toHex(byte[] data)
    {
        return toHex(data, data.length);
    }

 /**
     * Convert the passed in String to a byte array by
     * taking the bottom 8 bits of each character it contains.
     * 
     * @param string the string to be converted
     * @return a byte array representation
     */
    public static byte[] toByteArray(
        String string)
    {
        byte[]	bytes = new byte[string.length()];
        char[]  chars = string.toCharArray();
        
        for (int i = 0; i != chars.length; i++)
        {
            bytes[i] = (byte)chars[i];
        }
        
        return bytes;
    }



}