| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.chukwa.validationframework.util; |
| |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.InputStream; |
| import java.security.MessageDigest; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| public class MD5 { |
| public static String checksum(File file) { |
| try { |
| InputStream fin = new FileInputStream(file); |
| java.security.MessageDigest md5er = MessageDigest.getInstance("MD5"); |
| byte[] buffer = new byte[1024]; |
| int read; |
| do { |
| read = fin.read(buffer); |
| if (read > 0) |
| md5er.update(buffer, 0, read); |
| } while (read != -1); |
| fin.close(); |
| byte[] digest = md5er.digest(); |
| if (digest == null) |
| return null; |
| String strDigest = "0x"; |
| for (int i = 0; i < digest.length; i++) { |
| strDigest += Integer.toString((digest[i] & 0xff) + 0x100, 16) |
| .substring(1).toUpperCase(); |
| } |
| return strDigest; |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| public static String checksum(FileSystem fs, Path file) { |
| try { |
| FSDataInputStream fin = fs.open(file); |
| java.security.MessageDigest md5er = MessageDigest.getInstance("MD5"); |
| byte[] buffer = new byte[1024]; |
| int read; |
| do { |
| read = fin.read(buffer); |
| if (read > 0) |
| md5er.update(buffer, 0, read); |
| } while (read != -1); |
| fin.close(); |
| byte[] digest = md5er.digest(); |
| if (digest == null) |
| return null; |
| String strDigest = "0x"; |
| for (int i = 0; i < digest.length; i++) { |
| strDigest += Integer.toString((digest[i] & 0xff) + 0x100, 16) |
| .substring(1).toUpperCase(); |
| } |
| return strDigest; |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| } |