Scratch

package org.cfagency.c3f1;

public class C3F1 {
    
    // make last digit matter!!!

    public byte[] hash (byte[] source) {
        String baseNumString = "";
        String resultString = "";
        for (int index = 0; index < source.length; index++) {
            byte b = source[index];
            int i = Math.abs((int) b);
            baseNumString += Integer.toString(i);
        }
        int segments;
        if (baseNumString.length() % 16 > Math.ceil(Double.MIN_VALUE*16))
            segments = (int) Math.ceil(baseNumString.length()/16) + 1;
        else
            segments = (int) Math.ceil(baseNumString.length()/16);
        for (int segmentNumber = 1; segmentNumber <= segments; segmentNumber++) {
            long base;
            int segmentIndex = segmentNumber - 1;
            if (segmentNumber < segments) {
                String lstring;
                lstring = baseNumString.substring(segmentIndex, 16);
                if (lstring.length() == 0) {
                    lstring = "0";
                }
                base = new Long(lstring);
            }
            else {
                String lstring;
                lstring = baseNumString.substring(segmentIndex, baseNumString.length()-(segmentIndex)*16);
                if (lstring.length() == 0) {
                    lstring = "0";
                }
                base = new Long(lstring);
            }
            // top secret operations with the use variable
            resultString += Long.toString(use);
        }
        byte[] result = resultString.getBytes();
        return result;
    }
    
    public static byte[] hashBytes (byte[] source) {
        return new C3F1().hash(source);
    }

}