/*
 * HashFile.java
 *
 * Created on 2007. január 21., 17:55
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package tsdemo;

import java.security.MessageDigest;

import java.io.FileInputStream;

/**
 *
 * @author root
 */
public class HashFile {
    
    /** Creates a new instance of HashFile */
    public HashFile() {
    }
    
    public static byte[] getHash(String Filename, String Algorithm) {
        try {
            MessageDigest d = MessageDigest.getInstance(Algorithm);     // Get a hash handler
            FileInputStream f = new FileInputStream(Filename);          // open file for hashing
            byte[] b = new byte[1];                                     
            while ( -1 != f.read(b, 0, 1))                              // feed the message digester
                d.update(b);
            f.close();
            return d.digest();                                          // get the final hash and return it
        } catch (Exception e) {
        System.out.println("Hashing Error " + e.getMessage());
            return null;
        }
    }
    
}