Java Expert Needed - Code Fixing

A client of mine is looking to add few checks/swaps in his java code. You are required to look into a already existing solution written in C and do similar in Java. If you understand the code below, then please place your bid. import java.security.*; import java.util.*; public class HelloWorld{ public static void main(String []args){ [login to view URL]("Hello World"); calculateDW(4214, (byte) 000000001E22ANFN); } private static class EcmData { byte[] P1, P2, P3, P4, CW; boolean odd; } private byte[] calculateDW(int sid, EcmData ecm) { try { MessageDigest algorithm = [login to view URL]("MD5"); [login to view URL](); [login to view URL]([login to view URL]); [login to view URL]([login to view URL]); [login to view URL]([login to view URL]); [login to view URL]([login to view URL]); byte messageDigest[] = [login to view URL](); byte[] newDW = new byte[8]; for(int i = 0; i < 8; i++) newDW[i] = (byte)(messageDigest[i + 8] ^ [login to view URL][i]); //newDW[0] = messageDigest[8] // fix DW Checksum newDW[3] = (byte)((newDW[0] + newDW[1] + newDW[2]) & 0xFF); newDW[7] = (byte)((newDW[4] + newDW[5] + newDW[6]) & 0xFF); //print([login to view URL](sid) + "]); byte[] DW = new byte[16]; if([login to view URL]) [login to view URL](newDW, 0, DW, 8, [login to view URL]); else [login to view URL](newDW, 0, DW, 0, [login to view URL]); return DW; } catch(NoSuchAlgorithmException e) {} return null; } }