| /* |
| * 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.dubbo.admin.common.util; |
| |
| import org.apache.dubbo.common.io.Bytes; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| public class CoderUtil { |
| |
| private static final Logger logger = LoggerFactory.getLogger(CoderUtil.class); |
| private static MessageDigest md; |
| private static final char[] hexCode = "0123456789ABCDEF".toCharArray(); |
| |
| static { |
| try { |
| md = MessageDigest.getInstance("MD5"); |
| } catch (NoSuchAlgorithmException e) { |
| logger.error(e.getMessage(), e); |
| } |
| } |
| |
| public static String MD5_16bit(String input) { |
| String hash = MD5_32bit(input); |
| if (hash == null) { |
| return null; |
| } |
| return hash.substring(8, 24); |
| } |
| |
| public static String MD5_32bit(String input) { |
| if (input == null || input.length() == 0) { |
| return null; |
| } |
| md.update(input.getBytes()); |
| byte[] digest = md.digest(); |
| String hash = convertToString(digest); |
| return hash; |
| } |
| |
| public static String MD5_32bit(byte[] input) { |
| if (input == null || input.length == 0) { |
| return null; |
| } |
| md.update(input); |
| byte[] digest = md.digest(); |
| String hash = convertToString(digest); |
| return hash; |
| } |
| |
| private static String convertToString(byte[] data) { |
| StringBuilder r = new StringBuilder(data.length * 2); |
| for (byte b : data) { |
| r.append(hexCode[(b >> 4) & 0xF]); |
| r.append(hexCode[(b & 0xF)]); |
| } |
| return r.toString(); |
| } |
| |
| public static String decodeBase64(String source) { |
| return new String(Bytes.base642bytes(source)); |
| } |
| } |