| /* |
| * 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.openmeetings.utils.crypt; |
| |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| public class MD5 { |
| |
| private static String toHexString(byte b) { |
| int value = (b & 0x7F) + (b < 0 ? 128 : 0); |
| |
| String ret = (value < 16 ? "0" : ""); |
| ret += Integer.toHexString(value).toLowerCase(); |
| |
| return ret; |
| } |
| |
| public static String do_checksum(String data) throws NoSuchAlgorithmException { |
| MessageDigest md5 = MessageDigest.getInstance("MD5"); |
| StringBuffer strbuf = new StringBuffer(); |
| |
| md5.update(data.getBytes(), 0, data.length()); |
| byte[] digest = md5.digest(); |
| |
| for (int i = 0; i < digest.length; i++) { |
| strbuf.append(toHexString(digest[i])); |
| } |
| |
| return strbuf.toString(); |
| } |
| } |