001/* 002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 * $Id: JOOoConvertPluginImpl.java 18651 2007-05-13 20:28:53Z sfermigier $ 020 */ 021 022package org.nuxeo.ecm.platform.ui.web.auth.portal; 023 024import java.security.MessageDigest; 025import java.security.NoSuchAlgorithmException; 026import java.util.Base64; 027import java.util.Date; 028import java.util.List; 029import java.util.Map; 030 031import javax.servlet.http.HttpServletRequest; 032import javax.servlet.http.HttpServletResponse; 033 034import org.nuxeo.ecm.platform.api.login.UserIdentificationInfo; 035import org.nuxeo.ecm.platform.ui.web.auth.interfaces.NuxeoAuthenticationPlugin; 036 037public class PortalAuthenticator implements NuxeoAuthenticationPlugin { 038 039 public static final String SECRET_KEY_NAME = "secret"; 040 041 public static final String MAX_AGE_KEY_NAME = "maxAge"; 042 043 private static final String TS_HEADER = "NX_TS"; 044 045 private static final String RANDOM_HEADER = "NX_RD"; 046 047 private static final String TOKEN_HEADER = "NX_TOKEN"; 048 049 private static final String USER_HEADER = "NX_USER"; 050 051 private static final String TOKEN_SEP = ":"; 052 053 // 054 private String secret = "secret"; 055 056 // one hour by default 057 private long maxAge = 60 * 60; 058 059 public List<String> getUnAuthenticatedURLPrefix() { 060 return null; 061 } 062 063 public Boolean handleLoginPrompt(HttpServletRequest httpRequest, HttpServletResponse httpResponse, String baseURL) { 064 return false; 065 } 066 067 public UserIdentificationInfo handleRetrieveIdentity(HttpServletRequest httpRequest, 068 HttpServletResponse httpResponse) { 069 070 String ts = httpRequest.getHeader(TS_HEADER); 071 String random = httpRequest.getHeader(RANDOM_HEADER); 072 String token = httpRequest.getHeader(TOKEN_HEADER); 073 String userName = httpRequest.getHeader(USER_HEADER); 074 075 if (userName == null || ts == null || random == null || token == null) { 076 return null; 077 } 078 079 if (validateToken(ts, random, token, userName)) { 080 return new UserIdentificationInfo(userName, userName); 081 } else { 082 return null; 083 } 084 } 085 086 public void initPlugin(Map<String, String> parameters) { 087 if (parameters.containsKey(SECRET_KEY_NAME)) { 088 secret = parameters.get(SECRET_KEY_NAME); 089 } 090 if (parameters.containsKey(MAX_AGE_KEY_NAME)) { 091 String maxAgeStr = parameters.get(MAX_AGE_KEY_NAME); 092 if (maxAgeStr != null && !maxAgeStr.equals("")) { 093 maxAge = Long.parseLong(maxAgeStr); 094 } 095 } 096 } 097 098 public Boolean needLoginPrompt(HttpServletRequest httpRequest) { 099 return false; 100 } 101 102 protected Boolean validateToken(String ts, String random, String token, String userName) { 103 // reconstruct the token 104 String clearToken = ts + TOKEN_SEP + random + TOKEN_SEP + secret + TOKEN_SEP + userName; 105 106 byte[] hashedToken; 107 try { 108 hashedToken = MessageDigest.getInstance("MD5").digest(clearToken.getBytes()); 109 } catch (NoSuchAlgorithmException e) { 110 return false; 111 } 112 String base64HashedToken = Base64.getEncoder().encodeToString(hashedToken); 113 114 // check that tokens are the same => that we have the same shared key 115 if (!base64HashedToken.equals(token)) { 116 return false; 117 } 118 119 // check time stamp 120 long portalTS = Long.parseLong(ts); 121 long currentTS = (new Date()).getTime(); 122 123 return (currentTS - portalTS) / 1000 <= maxAge; 124 } 125 126}