Tools/Source/FrameworkWizard/src/org/tianocore/frameworkwizard/far/FarMd5.java

   1 /** @file
   2
   3  The file is used to caculate file MD5 value.
   4
   5  Copyright (c) 2006, Intel Corporation
   6  All rights reserved. This program and the accompanying materials
   7  are licensed and made available under the terms and conditions of the BSD License
   8  which accompanies this distribution.  The full text of the license may be found at
   9  http://opensource.org/licenses/bsd-license.php
  10
  11  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14  **/
  15 package org.tianocore.frameworkwizard.far;
  16
  17 import java.io.File;
  18 import java.io.FileInputStream;
  19 import java.security.MessageDigest;
  20
  21 public class FarMd5 {
  22
  23     static public String md5(File file) throws Exception {
  24         byte[] buffer = new byte[(int) file.length()];
  25         FileInputStream fInput = new FileInputStream(file);
  26         fInput.read(buffer);
  27         fInput.close();
  28         return md5(buffer);
  29
  30     }
  31
  32     static public String md5(byte[] buffer) throws Exception {
  33         MessageDigest md = MessageDigest.getInstance("MD5");
  34         byte[] md5 = md.digest(buffer);
  35         return new String(String.format("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", md5[0], md5[1], md5[2], md5[3], md5[4],
  36                                         md5[5], md5[6], md5[7], md5[8], md5[9], md5[10], md5[11], md5[12], md5[13],
  37                                         md5[14], md5[15]));
  38
  39     }
  40 }