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1 /* XMLAuthOps -- Authentication class implementation using XML files
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2
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3 Digital Image Library servlet components
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4
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5 Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de)
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 Please read license.txt for the full details. A copy of the GPL
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13 may be found at http://www.gnu.org/copyleft/lgpl.html
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 */
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20
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21 package digilib.auth;
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22
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531
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23 import java.io.File;
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24 import java.util.List;
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25 import java.util.Map;
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26
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1
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27 import javax.servlet.http.HttpServletRequest;
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28
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531
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29 import digilib.io.XMLListLoader;
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30 import digilib.servlet.DigilibRequest;
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1
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31
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531
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32 /** Implementation of AuthOps using XML files.
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33 *
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34 * The configuration file is read by an XMLListLoader into HashTree objects for
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35 * authentication paths and IP numbers.
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36 */
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1
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37 public class XMLAuthOps extends AuthOpsImpl {
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38
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531
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39 private File configFile;
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40 private HashTree authPaths;
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41 private HashTree authIPs;
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42
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43 /** Constructor taking an XML config file.
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44 *
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45 * @param u utils object
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46 * @param confFile Configuration file.
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47 * @throws AuthOpException Exception thrown on error.
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48 */
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49 public XMLAuthOps(File confFile) throws AuthOpException {
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50 configFile = confFile;
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51 init();
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52 }
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53
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54 /** Set configuration file.
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55 *
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56 * @param confFile XML config file.
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57 * @throws AuthOpException Exception thrown on error.
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58 */
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59 public void setConfig(File confFile) throws AuthOpException {
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60 configFile = confFile;
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61 init();
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62 }
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63
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531
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64 /** Initialize.
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65 *
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66 * Read configuration files and setup authentication arrays.
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67 *
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68 * @throws AuthOpException Exception thrown on error.
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69 */
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70 public void init() throws AuthOpException {
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71 logger.debug("xmlauthops.init (" + configFile + ")");
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72 Map<String, String> pathList = null;
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73 Map<String, String> ipList = null;
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74 try {
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75 // load authPaths
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76 XMLListLoader pathLoader =
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77 new XMLListLoader("digilib-paths", "path", "name", "role");
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78 pathList = pathLoader.loadURL(configFile.toURL().toString());
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79 // load authIPs
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80 XMLListLoader ipLoader =
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81 new XMLListLoader("digilib-addresses", "address", "ip", "role");
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82 ipList = ipLoader.loadURL(configFile.toURL().toString());
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83 } catch (Exception e) {
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84 throw new AuthOpException(
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85 "ERROR loading authorization config file: " + e);
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86 }
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87 if ((pathList == null) || (ipList == null)) {
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88 throw new AuthOpException("ERROR unable to load authorization config file!");
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89 }
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90 // setup path tree
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91 authPaths = new HashTree(pathList, "/", ",");
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92 // setup ip tree
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93 authIPs = new HashTree(ipList, ".", ",");
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94 }
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95
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96 /** Return authorization roles needed for request.
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97 *
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98 * Returns the list of authorization roles that are needed to access the
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99 * specified path. No list means the path is free.
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100 *
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101 * The location information of the request is also considered.
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102 *
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103 * @param filepath filepath to be accessed.
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104 * @param request ServletRequest with address information.
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105 * @throws AuthOpException Exception thrown on error.
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106 * @return List of Strings with role names.
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107 */
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108 public List<String> rolesForPath(String filepath, HttpServletRequest request)
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109 throws digilib.auth.AuthOpException {
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110 logger.debug("rolesForPath ("
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111 + filepath
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112 + ") by ["
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113 + request.getRemoteAddr()
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114 + "]");
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115
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116 // check if the requests address provides a role
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117 List<String> provided = authIPs.match(request.getRemoteAddr());
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118 if ((provided != null) && (provided.contains("ALL"))) {
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119 // ALL switches off checking;
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120 return null;
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121 }
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122 // which roles are required?
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123 List<String> required = authPaths.match(filepath);
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124 // do any provided roles match?
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125 if ((provided != null) && (required != null)) {
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126 for (int i = 0; i < provided.size(); i++) {
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127 if (required.contains(provided.get(i))) {
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128 // satisfied
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129 return null;
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130 }
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131 }
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132 }
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133 return required;
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134 }
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1
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135
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531
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136 /**
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137 * @see digilib.auth.AuthOps#rolesForPath(digilib.servlet.DigilibRequest)
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138 */
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139 public List<String> rolesForPath(DigilibRequest request) throws AuthOpException {
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140 logger.debug("rolesForPath ("
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141 + request.getFilePath()
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142 + ") by ["
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143 + request.getServletRequest().getRemoteAddr()
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144 + "]");
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145
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146 // check if the requests address provides a role
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147 List<String> provided =
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148 authIPs.match(request.getServletRequest().getRemoteAddr());
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149 if ((provided != null) && (provided.contains("ALL"))) {
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150 // ALL switches off checking;
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151 return null;
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152 }
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153 // which roles are required?
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154 List<String> required = authPaths.match(request.getFilePath());
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155 // do any provided roles match?
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156 if ((provided != null) && (required != null)) {
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157 for (int i = 0; i < provided.size(); i++) {
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158 if (required.contains(provided.get(i))) {
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159 // satisfied
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160 return null;
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161 }
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162 }
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163 }
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164 return required;
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165 }
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1
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166
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167 }
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