package java.security;

public abstract class MessageDigest
{

 public static MessageDigest getInstance(String) throws NoSuchAlgorithmException
 {
  return null;
 }
 
 public void update(byte[], int, int)
 {
 }
 
 public int digest(byte[], int, int) throws DigestException
 {
  return 0;
 }
 
 public void reset()
 {
 }
 
}