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