code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/server/Login.java

   1 /*
   2  * Copyright 2008, 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.server;
  20
  21 import static gr.ebs.gss.server.configuration.GSSConfigurationFactory.getConfiguration;
  22 import gr.ebs.gss.client.exceptions.DuplicateNameException;
  23 import gr.ebs.gss.client.exceptions.ObjectNotFoundException;
  24 import gr.ebs.gss.client.exceptions.RpcException;
  25 import gr.ebs.gss.server.domain.Nonce;
  26 import gr.ebs.gss.server.domain.User;
  27
  28 import java.io.IOException;
  29 import java.io.PrintWriter;
  30 import java.net.URI;
  31 import java.net.URISyntaxException;
  32 import java.net.URLEncoder;
  33 import java.util.Date;
  34
  35 import javax.servlet.http.Cookie;
  36 import javax.servlet.http.HttpServletRequest;
  37 import javax.servlet.http.HttpServletResponse;
  38
  39 import org.apache.commons.codec.binary.Base64;
  40 import org.apache.commons.logging.Log;
  41 import org.apache.commons.logging.LogFactory;
  42
  43 /**
  44  * The servlet that handles user logins.
  45  *
  46  * @author past
  47  */
  48 public class Login extends BaseServlet {
  49         /**
  50          * The request parameter name for the nonce.
  51          */
  52         private static final String NONCE_PARAM = "nonce";
  53
  54         /**
  55          * The request parameter name for the URL to redirect
  56          * to after authentication.
  57          */
  58         private static final String NEXT_URL_PARAM = "next";
  59
  60         /**
  61          * The serial version UID of the class.
  62          */
  63         private static final long serialVersionUID = 1L;
  64
  65         /**
  66          * The name of the authentication cookie.
  67          */
  68         public static final String AUTH_COOKIE = "_gss_a";
  69
  70         /**
  71          * The separator character for the authentication cookie.
  72          */
  73         public static final char COOKIE_SEPARATOR = '|';
  74
  75         /**
  76          * The name of the the webdav cookie.
  77          */
  78         public static final String WEBDAV_COOKIE = "_gss_wd";
  79
  80         /**
  81          * The logger.
  82          */
  83         private static Log logger = LogFactory.getLog(Login.class);
  84
  85         @Override
  86         public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
  87                 // Fetch the next URL to display, if any.
  88                 String nextUrl = request.getParameter(NEXT_URL_PARAM);
  89                 // Fetch the supplied nonce, if any.
  90                 String nonce = request.getParameter(NONCE_PARAM);
  91                 String[] attrs = new String[] {"REMOTE_USER", "HTTP_SHIB_INETORGPERSON_DISPLAYNAME",
  92                                         "HTTP_SHIB_INETORGPERSON_GIVENNAME", "HTTP_SHIB_PERSON_COMMONNAME",
  93                                         "HTTP_SHIB_PERSON_SURNAME", "HTTP_SHIB_INETORGPERSON_MAIL",
  94                                         "HTTP_SHIB_EP_UNSCOPEDAFFILIATION", "HTTP_PERSISTENT_ID"};
  95                 StringBuilder buf = new StringBuilder("Shibboleth Attributes\n");
  96                 for (String attr: attrs)
  97                         buf.append(attr+": ").append(request.getAttribute(attr)).append('\n');
  98                 logger.info(buf);
  99                 if (logger.isDebugEnabled()) {
 100                         buf = new StringBuilder("Shibboleth Attributes as bytes\n");
 101                         for (String attr: attrs)
 102                                 if (request.getAttribute(attr) != null)
 103                                         buf.append(attr+": ").append(getHexString(request.getAttribute(attr).toString().getBytes("UTF-8"))).append('\n');
 104                         logger.debug(buf);
 105                 }
 106                 User user = null;
 107                 response.setContentType("text/html");
 108                 Object usernameAttr = request.getAttribute("REMOTE_USER");
 109                 Object nameAttr = request.getAttribute("HTTP_SHIB_INETORGPERSON_DISPLAYNAME");
 110                 Object givennameAttr = request.getAttribute("HTTP_SHIB_INETORGPERSON_GIVENNAME"); // Multi-valued
 111                 Object cnAttr = request.getAttribute("HTTP_SHIB_PERSON_COMMONNAME"); // Multi-valued
 112                 Object snAttr = request.getAttribute("HTTP_SHIB_PERSON_SURNAME"); // Multi-valued
 113                 Object mailAttr = request.getAttribute("HTTP_SHIB_INETORGPERSON_MAIL"); // Multi-valued
 114                 Object persistentIdAttr = request.getAttribute("HTTP_PERSISTENT_ID");
 115                 // Use a configured test username if found, as a shortcut for development deployments.
 116                 String gwtServer = null;
 117                 if (getConfiguration().getString("testUsername") != null) {
 118                         usernameAttr = getConfiguration().getString("testUsername");
 119                         // Fetch the GWT code server URL, if any.
 120                         gwtServer = request.getParameter(GWT_SERVER_PARAM);
 121                 }
 122                 if (usernameAttr == null) {
 123                         String authErrorUrl = "authenticationError.jsp";
 124                         authErrorUrl += "?name=" + (nameAttr==null? "-": nameAttr.toString());
 125                         authErrorUrl += "&givenname=" + (givennameAttr==null? "-": givennameAttr.toString());
 126                         authErrorUrl += "&sn=" + (snAttr==null? "-": snAttr.toString());
 127                         authErrorUrl += "&cn=" + (cnAttr==null? "-": cnAttr.toString());
 128                         authErrorUrl += "&mail=" + (mailAttr==null? "-": mailAttr.toString());
 129                         response.sendRedirect(authErrorUrl);
 130                         return;
 131                 }
 132                 String username = decodeAttribute(usernameAttr);
 133                 String name;
 134                 if (nameAttr != null && !nameAttr.toString().isEmpty())
 135                         name = decodeAttribute(nameAttr);
 136                 else if (cnAttr != null && !cnAttr.toString().isEmpty()) {
 137                         name = decodeAttribute(cnAttr);
 138                         if (name.indexOf(';') != -1)
 139                                 name = name.substring(0, name.indexOf(';'));
 140                 } else if (givennameAttr != null && snAttr != null && !givennameAttr.toString().isEmpty() && !snAttr.toString().isEmpty()) {
 141                         String givenname = decodeAttribute(givennameAttr);
 142                         if (givenname.indexOf(';') != -1)
 143                                 givenname = givenname.substring(0, givenname.indexOf(';'));
 144                         String sn = decodeAttribute(snAttr);
 145                         if (sn.indexOf(';') != -1)
 146                                 sn = sn.substring(0, sn.indexOf(';'));
 147                         name = givenname + ' ' + sn;
 148                 } else if (givennameAttr == null && snAttr != null && !snAttr.toString().isEmpty()) {
 149                         name = decodeAttribute(snAttr);
 150                         if (name.indexOf(';') != -1)
 151                                 name = name.substring(0, name.indexOf(';'));
 152                 } else
 153                         name = username;
 154                 String mail = mailAttr != null ? mailAttr.toString() : username;
 155                 if (mail.indexOf(';') != -1)
 156                         mail = mail.substring(0, mail.indexOf(';'));
 157                 String persistentId = persistentIdAttr != null ? persistentIdAttr.toString() : "";
 158                 String idp = "";
 159                 String idpid = "";
 160                 if (!persistentId.isEmpty()) {
 161                         int bang = persistentId.indexOf('!');
 162                         if (bang > -1) {
 163                                 idp = persistentId.substring(0, bang);
 164                                 idpid = persistentId.substring(bang + 1);
 165                         }
 166                 }
 167                 try {
 168                         user = getService().findUser(username);
 169                         if (user == null)
 170                                 user = getService().createUser(username, name, mail, idp, idpid);
 171                         if (!user.hasAcceptedPolicy()) {
 172                                 String policyUrl = "policy.jsp";
 173                                 if (request.getQueryString() != null)
 174                                         policyUrl += "?user=" + username + "&" + request.getQueryString();
 175                                 response.sendRedirect(policyUrl);
 176                                 return;
 177                         }
 178                         user.setName(name);
 179                         user.setEmail(mail);
 180                         user.setIdentityProvider(idp);
 181                         user.setIdentityProviderId(idpid);
 182                         user.setLastLogin(new Date());
 183                         if (user.getAuthToken() == null)
 184                                 user = getService().updateUserToken(user.getId());
 185                         // Set WebDAV password to token if it's never been set.
 186                         if (user.getWebDAVPassword() == null || user.getWebDAVPassword().length() == 0) {
 187                                 String tokenEncoded = new String(Base64.encodeBase64(user.getAuthToken()), "US-ASCII");
 188                                 user.setWebDAVPassword(tokenEncoded);
 189                         }
 190                         // Set the default user class if none was set.
 191                         if (user.getUserClass() == null)
 192                                 user.setUserClass(getService().getUserClasses().get(0));
 193                         getService().updateUser(user);
 194                 } catch (RpcException e) {
 195                         String error = "An error occurred while communicating with the service";
 196                         logger.error(error, e);
 197                         response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 198                         return;
 199                 } catch (DuplicateNameException e) {
 200                         String error = "User with username " + username + " already exists";
 201                         logger.error(error, e);
 202                         response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 203                         return;
 204                 } catch (ObjectNotFoundException e) {
 205                         String error = "No username was provided";
 206                         logger.error(error, e);
 207                         response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 208                         return;
 209                 }
 210                 String tokenEncoded = new String(Base64.encodeBase64(user.getAuthToken()), "US-ASCII");
 211                 String userEncoded = URLEncoder.encode(user.getUsername(), "US-ASCII");
 212                 if (logger.isDebugEnabled())
 213                         logger.debug("user: "+userEncoded+" token: "+tokenEncoded);
 214                 if (nextUrl != null && !nextUrl.isEmpty()) {
 215                         URI next;
 216                         if (gwtServer != null)
 217                                 nextUrl += '?' + GWT_SERVER_PARAM + '=' + gwtServer;
 218                         try {
 219                                 next = new URI(nextUrl);
 220                         } catch (URISyntaxException e) {
 221                                 response.sendError(HttpServletResponse.SC_BAD_REQUEST, e.getMessage());
 222                                 return;
 223                         }
 224                         if ("x-gr-ebs-igss".equalsIgnoreCase(next.getScheme()))
 225                                 nextUrl += "?u=" + userEncoded + "&t=" + tokenEncoded;
 226                         else {
 227                                 String domain = next.getHost();
 228                                 String path = getServletContext().getContextPath() + '/';
 229                                 Cookie cookie = new Cookie(AUTH_COOKIE, userEncoded + COOKIE_SEPARATOR +
 230                                                         tokenEncoded);
 231                                 cookie.setMaxAge(-1);
 232                                 cookie.setDomain(domain);
 233                                 cookie.setPath(path);
 234                             response.addCookie(cookie);
 235                             cookie = new Cookie(WEBDAV_COOKIE, user.getWebDAVPassword());
 236                                 cookie.setMaxAge(-1);
 237                                 cookie.setDomain(domain);
 238                                 cookie.setPath(path);
 239                                 response.addCookie(cookie);
 240                         }
 241                     response.sendRedirect(nextUrl);
 242                 } else if (nonce != null) {
 243                         nonce = URLEncoder.encode(nonce, "US-ASCII");
 244                         Nonce n = null;
 245                         try {
 246                                 if (logger.isDebugEnabled())
 247                                         logger.debug("user: "+user.getId()+" nonce: "+nonce);
 248                                 n = getService().getNonce(nonce, user.getId());
 249                         } catch (ObjectNotFoundException e) {
 250                             PrintWriter out = response.getWriter();
 251                             out.println("<HTML>");
 252                             out.println("<HEAD><TITLE>" + getServiceName() + " Authentication</TITLE>" +
 253                                         "<LINK TYPE='text/css' REL='stylesheet' HREF='gss.css'></HEAD>");
 254                             out.println("<BODY><CENTER><P>");
 255                             out.println("The supplied nonce could not be found!");
 256                             out.println("</CENTER></BODY></HTML>");
 257                             return;
 258                         } catch (RpcException e) {
 259                                 String error = "An error occurred while communicating with the service";
 260                                 logger.error(error, e);
 261                                 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 262                                 return;
 263                         }
 264                         try {
 265                                 getService().activateUserNonce(user.getId(), nonce, n.getNonceExpiryDate());
 266                         } catch (ObjectNotFoundException e) {
 267                                 String error = "Unable to find user";
 268                                 logger.error(error, e);
 269                                 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 270                                 return;
 271                         } catch (RpcException e) {
 272                                 String error = "An error occurred while communicating with the service";
 273                                 logger.error(error, e);
 274                                 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 275                                 return;
 276                         }
 277                         try {
 278                                 getService().removeNonce(n.getId());
 279                         } catch (ObjectNotFoundException e) {
 280                                 logger.info("Nonce already removed!", e);
 281                         } catch (RpcException e) {
 282                                 logger.warn("Could not remove nonce from data store", e);
 283                         }
 284                     PrintWriter out = response.getWriter();
 285                     out.println("<HTML>");
 286                     out.println("<HEAD><TITLE>" + getServiceName() + " Authentication</TITLE>" +
 287                                 "<LINK TYPE='text/css' REL='stylesheet' HREF='gss.css'></HEAD>");
 288                     out.println("<BODY><CENTER><P>");
 289                     out.println("You can now close this browser window and return to your application.");
 290                     out.println("</CENTER></BODY></HTML>");
 291                 } else {
 292                     PrintWriter out = response.getWriter();
 293                     out.println("<HTML>");
 294                     out.println("<HEAD><TITLE>" + getServiceName() + " Authentication</TITLE>" +
 295                                 "<LINK TYPE='text/css' REL='stylesheet' HREF='gss.css'></HEAD>");
 296                     out.println("<BODY><CENTER><P>");
 297                     out.println("Name: " + user.getName() + "<BR>");
 298                     out.println("E-mail: " + user.getEmail() + "<BR><P>");
 299                     out.println("Username: " + user.getUsername() + "<BR>");
 300                     out.println("Athentication token: " + tokenEncoded + "<BR>");
 301                     out.println("</CENTER></BODY></HTML>");
 302                 }
 303         }
 304 }