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1 package de.mpiwg.itgroup.annotationManager.restlet;
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2
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9
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3 import java.io.File;
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4 import java.io.FileInputStream;
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5 import java.io.FileNotFoundException;
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6 import java.io.IOException;
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7 import java.io.InputStream;
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8 import java.net.URI;
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9 import java.net.URISyntaxException;
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10 import java.util.Hashtable;
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9
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11 import java.util.Properties;
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12
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13 import javax.naming.NamingEnumeration;
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14 import javax.naming.NamingException;
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15 import javax.naming.directory.Attribute;
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16 import javax.naming.directory.DirContext;
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17 import javax.naming.directory.InitialDirContext;
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18 import javax.naming.directory.SearchControls;
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19 import javax.naming.directory.SearchResult;
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20 import javax.security.auth.Subject;
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21 import javax.security.auth.login.Configuration;
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22 import javax.security.auth.login.LoginContext;
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23 import javax.security.auth.login.LoginException;
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24 import javax.servlet.ServletContext;
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25
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26 import org.apache.log4j.BasicConfigurator;
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27 import org.apache.log4j.Level;
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28 import org.apache.log4j.Logger;
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29 import org.restlet.Application;
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30 import org.restlet.Context;
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31 import org.restlet.Request;
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32 import org.restlet.Response;
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33 import org.restlet.Restlet;
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34 import org.restlet.data.ChallengeScheme;
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35 import org.restlet.data.ClientInfo;
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36 import org.restlet.ext.jaas.JaasVerifier;
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37 import org.restlet.routing.Router;
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38 import org.restlet.security.ChallengeAuthenticator;
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39 import org.restlet.security.User;
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40
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41 import com.sun.security.auth.login.ConfigFile;
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42
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43 public class RestServer extends Application {
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44
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45 private ChallengeAuthenticator authenticator;
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46
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47 /**
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48 * Properties holding consumer keys and secrets
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49 */
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50 private Properties consumerKeys;
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51 public final String CONSUMER_KEYS_PATH = "WEB-INF/consumerkeys.property";
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52
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53 /**
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54 * constructor
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55 *
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56 * @param parentContext
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57 */
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58 public RestServer(Context parentContext) {
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59 super(parentContext);
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60
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61 Logger rl = Logger.getRootLogger();
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62 BasicConfigurator.configure();
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63 rl.setLevel(Level.DEBUG);
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64 // read consumerKeys from webapp
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65 consumerKeys = new Properties();
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66 ServletContext sc = (ServletContext) getContext().getServerDispatcher()
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67 .getContext().getAttributes()
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68 .get("org.restlet.ext.servlet.ServletContext");
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69 if (sc != null) {
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70 InputStream ps = sc.getResourceAsStream(CONSUMER_KEYS_PATH);
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71 if (ps == null) {
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72 // try as file
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73 File pf = new File(sc.getRealPath(CONSUMER_KEYS_PATH));
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74 if (pf != null) {
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75 rl.debug("trying file for consumer keys: "+pf);
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76 try {
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77 ps = new FileInputStream(pf);
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78 } catch (FileNotFoundException e) {
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79 // TODO Auto-generated catch block
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80 e.printStackTrace();
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81 }
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82 }
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83 }
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84 if (ps != null) {
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85 rl.debug("loading consumer keys from "+CONSUMER_KEYS_PATH);
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86 try {
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87 consumerKeys.load(ps);
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88 } catch (IOException e) {
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89 // TODO Auto-generated catch block
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90 e.printStackTrace();
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91 }
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92 rl.debug("consumer keys: "+consumerKeys);
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93 } else {
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94 rl.error("Unable to get resource "+CONSUMER_KEYS_PATH);
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95 }
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96 } else {
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97 rl.error("Unable to get ServletContext!");
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98 }
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99
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100 }
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101
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102 /**
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103 * returns consumer secret for consumer key.
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104 * returns null if consumer key doesn't exist.
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105 * @param consumerKey
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106 * @return
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107 */
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108 public String getConsumerSecret(String consumerKey) {
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109 return consumerKeys.getProperty(consumerKey);
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110 }
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111
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112 /**
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113 * Erzeuge einen Authenticator
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114 *
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115 * @return
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116 */
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117 private ChallengeAuthenticator createAuthenticator() {
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118 Context context = getContext();
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119 boolean optional = true;
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120 ChallengeScheme challengeScheme = ChallengeScheme.HTTP_BASIC;
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121 String realm = "Annotation Service";
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122
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123 JaasVerifier verifier = new JaasVerifier(
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124 "BasicJaasAuthenticationApplication");
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125 // JaasVerifier verifier = new JaasVerifier("DummyAuthentication");
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126
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127 Configuration jaasConfig;
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128 jaasConfig = createConfiguration();
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129
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130 verifier.setConfiguration(jaasConfig);
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131 verifier.setUserPrincipalClassName("com.sun.security.auth.UserPrincipal");
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132
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133 ChallengeAuthenticator auth = new ChallengeAuthenticator(context,
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134 optional, challengeScheme, realm, verifier) {
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135 @Override
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136 protected boolean authenticate(Request request, Response response) {
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137 if (request.getChallengeResponse() == null) {
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138 return false;
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139 } else {
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140 return super.authenticate(request, response);
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141 }
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142 }
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143 };
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144
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145 return auth;
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146 }
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147
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148 /**
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149 * Konfiguration fuer den Authentificator in Jaas. Pfad zum
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150 * JAAS-Konfigurationsfile liegt im Context-Parameter
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151 * "de.mpiwg.itgroup.annotationManager.jaas.configFilePath".
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152 *
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153 * @return
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154 */
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155 protected Configuration createConfiguration() {
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156 Configuration jaasConfig;
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157 URI confUri;
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158
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159 Context context = getContext();
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160 String configFilePath = context.getParameters().getFirstValue(
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161 "de.mpiwg.itgroup.annotationManager.jaas.configFilePath");
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162
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163 try {
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164 confUri = new URI(configFilePath);
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165 } catch (URISyntaxException e) {
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166 e.printStackTrace();
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167 confUri = null;
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168 }
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169
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170 jaasConfig = new ConfigFile(confUri);
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171 return jaasConfig;
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172 }
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173
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174 /*
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175 * (non-Javadoc)
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176 *
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177 * @see org.restlet.Application#createInboundRoot()
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178 */
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179 public synchronized Restlet createInboundRoot() {
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180 this.authenticator = createAuthenticator();
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181
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182 // String target = "{rh}/{rf}/XX";
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183 // Redirector redirector = new
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184 // Redirector(getContext().createChildContext(), target,
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185 // Redirector.MODE_CLIENT_SEE_OTHER);
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186
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187 Router router = new Router(getContext());
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188
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189 router.attach("/annotator/annotations", AnnotatorAnnotations.class);
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190 router.attach("/annotator/search", AnnotatorSearch.class); // annotator api askes
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191 // for different uris
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192 // for search and
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193 // adding
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194 // router.attach("/search",SearchAnnotations.class); // annotator api
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195 // askes for different uris for search and adding
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196 router.attach("/dummy", Dummy.class);
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197
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198 // router.attach("",redirector);
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199 router.attach("/annotator", ExtendedAnnotationInput.class);
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200 router.attach("/", AnnotatorInfo.class);
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201 authenticator.setNext(router);
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202 return authenticator;
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203 }
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204
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205 /**
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206 * Authentifiziere den Benutzer aus dem Request (BasicAuthenfication)
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207 *
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208 * @param request
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209 * @param response
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210 * @return
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211 */
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212 public boolean authenticate(Request request, Response response) {
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213 if (!request.getClientInfo().isAuthenticated()) {
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214 authenticator.challenge(response, false);
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215 return false;
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216 }
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217
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218 if (request.getClientInfo().getUser() == null) // FIXME sometimes ist
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219 // authenticated true,
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220 // but no user
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221 {
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222 authenticator.challenge(response, false);
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223 return false;
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224 }
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225 return true;
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226 }
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227
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228 /**
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229 * Authentifiziere den Benutzer
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230 *
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231 * @param username
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232 * @param password
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233 * @param request
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234 * @return
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235 */
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236 public boolean authenticate(String username, String password,
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237 Request request) {
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238 LoginContext lc;
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239
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240 try {
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241 Configuration conf = createConfiguration();
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242
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243 lc = new LoginContext("BasicJaasAuthenticationApplication", null,
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244 new MyCallBackHandler(username, password), conf);
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245 // lc = new LoginContext("DummyAuthentication", null, new
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246 // MyCallBackHandler(username,password),conf);
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247 lc.login();
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248 } catch (LoginException e) {
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249 // TODO Auto-generated catch block
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250 e.printStackTrace();
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251 return false;
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252 }
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253
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254 Subject subject = lc.getSubject();
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255 ClientInfo clientInfo = new ClientInfo();
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256 User user = new User(username);
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257 clientInfo.setAuthenticated(true);
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258 clientInfo.setUser(user);
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259
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260 request.setClientInfo(clientInfo);
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261 return true;
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262 }
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263
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264 /**
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265 * Hole den vollen Benutzernamen aus dem LDAP
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266 *
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267 * @param creator
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268 * @return
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269 */
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270 public String getUserNameFromLdap(String creator) {
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271 String retString = creator; // falls nichts gefunden wird einfach den
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272 // creator zurueckgeben
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273 Hashtable<String, String> env = new Hashtable<String, String>();
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274 String sp = "com.sun.jndi.ldap.LdapCtxFactory";
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275 env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, sp);
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276
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277 String ldapUrl = "ldap://ldapreplik.mpiwg-berlin.mpg.de/dc=mpiwg-berlin,dc=mpg,dc=de";// TODO
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278 // should
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279 // go
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280 // into
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281 // config
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282 // file
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283 env.put(javax.naming.Context.PROVIDER_URL, ldapUrl);
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284
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285 DirContext dctx;
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286 try {
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287 dctx = new InitialDirContext(env);
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288 } catch (NamingException e1) {
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289 // TODO Auto-generated catch block
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290 e1.printStackTrace();
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291 return retString;
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292 }
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293
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294 String base = "ou=People";
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295
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296 SearchControls sc = new SearchControls();
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297 String[] attributeFilter = { "cn", "mail" };
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298 sc.setReturningAttributes(attributeFilter);
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299 sc.setSearchScope(SearchControls.SUBTREE_SCOPE);
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300
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301 String filter = "(uid=" + creator + ")";
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302
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303 try {
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304 NamingEnumeration<SearchResult> results = dctx.search(base, filter,
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305 sc);
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306 while (results.hasMore()) {
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307 SearchResult sr = (SearchResult) results.next();
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308 javax.naming.directory.Attributes attrs = sr.getAttributes();
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309
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310 Attribute attr = attrs.get("cn");
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311 retString = (String) attr.get();
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312 }
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313 } catch (NamingException e) {
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314 // TODO Auto-generated catch block
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315 e.printStackTrace();
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316 }
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317
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318 try {
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319 dctx.close();
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320 } catch (NamingException e) {
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321 // TODO Auto-generated catch block
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322 e.printStackTrace();
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323 }
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324 return retString;
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325 }
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326
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327 }
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