DataHttp.java

   1 package org.argeo.cms.internal.kernel;
   2
   3 import static org.argeo.cms.auth.AuthConstants.LOGIN_CONTEXT_USER;
   4
   5 import java.io.IOException;
   6 import java.io.Serializable;
   7 import java.net.URL;
   8 import java.security.PrivilegedActionException;
   9 import java.security.PrivilegedExceptionAction;
  10 import java.util.Properties;
  11 import java.util.StringTokenizer;
  12
  13 import javax.jcr.Repository;
  14 import javax.jcr.RepositoryException;
  15 import javax.jcr.Session;
  16 import javax.security.auth.Subject;
  17 import javax.security.auth.callback.Callback;
  18 import javax.security.auth.callback.CallbackHandler;
  19 import javax.security.auth.callback.NameCallback;
  20 import javax.security.auth.callback.PasswordCallback;
  21 import javax.security.auth.login.CredentialNotFoundException;
  22 import javax.security.auth.login.LoginContext;
  23 import javax.security.auth.login.LoginException;
  24 import javax.servlet.ServletException;
  25 import javax.servlet.http.HttpServletRequest;
  26 import javax.servlet.http.HttpServletResponse;
  27
  28 import org.apache.commons.codec.binary.Base64;
  29 import org.apache.commons.logging.Log;
  30 import org.apache.commons.logging.LogFactory;
  31 import org.apache.jackrabbit.server.SessionProvider;
  32 import org.apache.jackrabbit.server.remoting.davex.JcrRemotingServlet;
  33 import org.apache.jackrabbit.webdav.simple.SimpleWebdavServlet;
  34 import org.argeo.cms.CmsException;
  35 import org.argeo.cms.auth.AuthConstants;
  36 import org.argeo.cms.auth.HttpRequestCallback;
  37 import org.argeo.cms.auth.HttpRequestCallbackHandler;
  38 import org.argeo.jcr.ArgeoJcrConstants;
  39 import org.argeo.jcr.JcrUtils;
  40 import org.osgi.service.http.HttpContext;
  41 import org.osgi.service.http.HttpService;
  42 import org.osgi.service.http.NamespaceException;
  43 import org.osgi.service.useradmin.Authorization;
  44
  45 /**
  46  * Intercepts and enriches http access, mainly focusing on security and
  47  * transactionality.
  48  */
  49 class DataHttp implements KernelConstants, ArgeoJcrConstants {
  50         private final static Log log = LogFactory.getLog(DataHttp.class);
  51
  52         // private final static String ATTR_AUTH = "auth";
  53         private final static String HEADER_AUTHORIZATION = "Authorization";
  54         private final static String HEADER_WWW_AUTHENTICATE = "WWW-Authenticate";
  55
  56         private final HttpService httpService;
  57
  58         // FIXME Make it more unique
  59         private String httpAuthRealm = "Argeo";
  60
  61         // WebDav / JCR remoting
  62         private OpenInViewSessionProvider sessionProvider;
  63
  64         DataHttp(HttpService httpService, NodeRepository node) {
  65                 this.httpService = httpService;
  66                 sessionProvider = new OpenInViewSessionProvider();
  67                 // registerRepositoryServlets(ALIAS_NODE, node);
  68         }
  69
  70         public void destroy() {
  71                 // unregisterRepositoryServlets(ALIAS_NODE);
  72         }
  73
  74         void registerRepositoryServlets(String alias, Repository repository) {
  75                 try {
  76                         registerWebdavServlet(alias, repository, true);
  77                         registerWebdavServlet(alias, repository, false);
  78                         registerRemotingServlet(alias, repository, true);
  79                         registerRemotingServlet(alias, repository, false);
  80                 } catch (Exception e) {
  81                         throw new CmsException(
  82                                         "Could not register servlets for repository " + alias, e);
  83                 }
  84         }
  85
  86         void unregisterRepositoryServlets(String alias) {
  87                 // FIXME unregister servlets
  88         }
  89
  90         void registerWebdavServlet(String alias, Repository repository,
  91                         boolean anonymous) throws NamespaceException, ServletException {
  92                 WebdavServlet webdavServlet = new WebdavServlet(repository,
  93                                 sessionProvider);
  94                 String pathPrefix = anonymous ? WEBDAV_PUBLIC : WEBDAV_PRIVATE;
  95                 String path = pathPrefix + "/" + alias;
  96                 Properties ip = new Properties();
  97                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_CONFIG, WEBDAV_CONFIG);
  98                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_PATH_PREFIX, path);
  99                 httpService.registerServlet(path, webdavServlet, ip,
 100                                 new DataHttpContext(anonymous));
 101         }
 102
 103         void registerRemotingServlet(String alias, Repository repository,
 104                         boolean anonymous) throws NamespaceException, ServletException {
 105                 String pathPrefix = anonymous ? REMOTING_PUBLIC : REMOTING_PRIVATE;
 106                 RemotingServlet remotingServlet = new RemotingServlet(repository,
 107                                 sessionProvider);
 108                 String path = pathPrefix + "/" + alias;
 109                 Properties ip = new Properties();
 110                 ip.setProperty(JcrRemotingServlet.INIT_PARAM_RESOURCE_PATH_PREFIX, path);
 111
 112                 // Looks like a bug in Jackrabbit remoting init
 113                 ip.setProperty(RemotingServlet.INIT_PARAM_HOME,
 114                                 KernelUtils.getOsgiInstanceDir() + "/tmp/jackrabbit");
 115                 ip.setProperty(RemotingServlet.INIT_PARAM_TMP_DIRECTORY, "remoting");
 116                 // in order to avoid annoying warning.
 117                 ip.setProperty(RemotingServlet.INIT_PARAM_PROTECTED_HANDLERS_CONFIG, "");
 118                 httpService.registerServlet(path, remotingServlet, ip,
 119                                 new DataHttpContext(anonymous));
 120         }
 121
 122         private Subject subjectFromRequest(HttpServletRequest request) {
 123                 Authorization authorization = (Authorization) request
 124                                 .getAttribute(HttpContext.AUTHORIZATION);
 125                 if (authorization == null)
 126                         throw new CmsException("Not authenticated");
 127                 try {
 128                         LoginContext lc = new LoginContext(
 129                                         AuthConstants.LOGIN_CONTEXT_USER,
 130                                         new HttpRequestCallbackHandler(request));
 131                         lc.login();
 132                         return lc.getSubject();
 133                 } catch (LoginException e) {
 134                         throw new CmsException("Cannot login", e);
 135                 }
 136         }
 137
 138         private class DataHttpContext implements HttpContext {
 139                 private final boolean anonymous;
 140
 141                 DataHttpContext(boolean anonymous) {
 142                         this.anonymous = anonymous;
 143                 }
 144
 145                 @Override
 146                 public boolean handleSecurity(final HttpServletRequest request,
 147                                 HttpServletResponse response) throws IOException {
 148
 149                         if (anonymous) {
 150                                 Subject subject = KernelUtils.anonymousLogin();
 151                                 Authorization authorization = subject
 152                                                 .getPrivateCredentials(Authorization.class).iterator()
 153                                                 .next();
 154                                 request.setAttribute(REMOTE_USER, AuthConstants.ROLE_ANONYMOUS);
 155                                 request.setAttribute(AUTHORIZATION, authorization);
 156                                 return true;
 157                         }
 158
 159                         if (log.isTraceEnabled())
 160                                 KernelUtils.logRequestHeaders(log, request);
 161                         try {
 162                                 new LoginContext(LOGIN_CONTEXT_USER,
 163                                                 new HttpRequestCallbackHandler(request)).login();
 164                                 return true;
 165                         } catch (CredentialNotFoundException e) {
 166                                 CallbackHandler token = basicAuth(request);
 167                                 if (token != null) {
 168                                         try {
 169                                                 LoginContext lc = new LoginContext(LOGIN_CONTEXT_USER,
 170                                                                 token);
 171                                                 lc.login();
 172                                                 // Note: this is impossible to reliably clear the
 173                                                 // authorization header when access from a browser.
 174                                                 return true;
 175                                         } catch (LoginException e1) {
 176                                                 throw new CmsException("Could not login", e1);
 177                                         }
 178                                 } else {
 179                                         requestBasicAuth(request, response);
 180                                         return false;
 181                                 }
 182                         } catch (LoginException e) {
 183                                 throw new CmsException("Could not login", e);
 184                         }
 185                 }
 186
 187                 @Override
 188                 public URL getResource(String name) {
 189                         return Activator.getBundleContext().getBundle().getResource(name);
 190                 }
 191
 192                 @Override
 193                 public String getMimeType(String name) {
 194                         return null;
 195                 }
 196
 197                 private void requestBasicAuth(HttpServletRequest request,
 198                                 HttpServletResponse response) {
 199                         response.setStatus(401);
 200                         response.setHeader(HEADER_WWW_AUTHENTICATE, "basic realm=\""
 201                                         + httpAuthRealm + "\"");
 202                         // request.getSession().setAttribute(ATTR_AUTH, Boolean.TRUE);
 203                 }
 204
 205                 private CallbackHandler basicAuth(final HttpServletRequest httpRequest) {
 206                         String authHeader = httpRequest.getHeader(HEADER_AUTHORIZATION);
 207                         if (authHeader != null) {
 208                                 StringTokenizer st = new StringTokenizer(authHeader);
 209                                 if (st.hasMoreTokens()) {
 210                                         String basic = st.nextToken();
 211                                         if (basic.equalsIgnoreCase("Basic")) {
 212                                                 try {
 213                                                         // TODO manipulate char[]
 214                                                         String credentials = new String(
 215                                                                         Base64.decodeBase64(st.nextToken()),
 216                                                                         "UTF-8");
 217                                                         // log.debug("Credentials: " + credentials);
 218                                                         int p = credentials.indexOf(":");
 219                                                         if (p != -1) {
 220                                                                 final String login = credentials
 221                                                                                 .substring(0, p).trim();
 222                                                                 final char[] password = credentials
 223                                                                                 .substring(p + 1).trim().toCharArray();
 224                                                                 return new CallbackHandler() {
 225                                                                         public void handle(Callback[] callbacks) {
 226                                                                                 for (Callback cb : callbacks) {
 227                                                                                         if (cb instanceof NameCallback)
 228                                                                                                 ((NameCallback) cb)
 229                                                                                                                 .setName(login);
 230                                                                                         else if (cb instanceof PasswordCallback)
 231                                                                                                 ((PasswordCallback) cb)
 232                                                                                                                 .setPassword(password);
 233                                                                                         else if (cb instanceof HttpRequestCallback)
 234                                                                                                 ((HttpRequestCallback) cb)
 235                                                                                                                 .setRequest(httpRequest);
 236                                                                                 }
 237                                                                         }
 238                                                                 };
 239                                                         } else {
 240                                                                 throw new CmsException(
 241                                                                                 "Invalid authentication token");
 242                                                         }
 243                                                 } catch (Exception e) {
 244                                                         throw new CmsException(
 245                                                                         "Couldn't retrieve authentication", e);
 246                                                 }
 247                                         }
 248                                 }
 249                         }
 250                         return null;
 251                 }
 252
 253         }
 254
 255         /**
 256          * Implements an open session in view patter: a new JCR session is created
 257          * for each request
 258          */
 259         private class OpenInViewSessionProvider implements SessionProvider,
 260                         Serializable {
 261                 private static final long serialVersionUID = 2270957712453841368L;
 262
 263                 public Session getSession(HttpServletRequest request, Repository rep,
 264                                 String workspace) throws javax.jcr.LoginException,
 265                                 ServletException, RepositoryException {
 266                         return login(request, rep, workspace);
 267                 }
 268
 269                 protected Session login(HttpServletRequest request,
 270                                 Repository repository, String workspace)
 271                                 throws RepositoryException {
 272                         if (log.isTraceEnabled())
 273                                 log.trace("Login to workspace "
 274                                                 + (workspace == null ? "<default>" : workspace)
 275                                                 + " in web session " + request.getSession().getId());
 276                         return repository.login(workspace);
 277                 }
 278
 279                 public void releaseSession(Session session) {
 280                         JcrUtils.logoutQuietly(session);
 281                         if (log.isTraceEnabled())
 282                                 log.trace("Logged out remote JCR session " + session);
 283                 }
 284         }
 285
 286         private class WebdavServlet extends SimpleWebdavServlet {
 287                 private static final long serialVersionUID = -4687354117811443881L;
 288                 private final Repository repository;
 289
 290                 public WebdavServlet(Repository repository,
 291                                 SessionProvider sessionProvider) {
 292                         this.repository = repository;
 293                         setSessionProvider(sessionProvider);
 294                 }
 295
 296                 public Repository getRepository() {
 297                         return repository;
 298                 }
 299
 300                 @Override
 301                 protected void service(final HttpServletRequest request,
 302                                 final HttpServletResponse response) throws ServletException,
 303                                 IOException {
 304                         try {
 305                                 Subject subject = subjectFromRequest(request);
 306                                 Subject.doAs(subject, new PrivilegedExceptionAction<Void>() {
 307                                         @Override
 308                                         public Void run() throws Exception {
 309                                                 WebdavServlet.super.service(request, response);
 310                                                 return null;
 311                                         }
 312                                 });
 313                         } catch (PrivilegedActionException e) {
 314                                 throw new CmsException("Cannot process webdav request",
 315                                                 e.getException());
 316                         }
 317                 }
 318         }
 319
 320         private class RemotingServlet extends JcrRemotingServlet {
 321                 private static final long serialVersionUID = 4605238259548058883L;
 322                 private final Repository repository;
 323                 private final SessionProvider sessionProvider;
 324
 325                 public RemotingServlet(Repository repository,
 326                                 SessionProvider sessionProvider) {
 327                         this.repository = repository;
 328                         this.sessionProvider = sessionProvider;
 329                 }
 330
 331                 @Override
 332                 protected Repository getRepository() {
 333                         return repository;
 334                 }
 335
 336                 @Override
 337                 protected SessionProvider getSessionProvider() {
 338                         return sessionProvider;
 339                 }
 340
 341                 @Override
 342                 protected void service(final HttpServletRequest request,
 343                                 final HttpServletResponse response) throws ServletException,
 344                                 IOException {
 345                         try {
 346                                 Subject subject = subjectFromRequest(request);
 347                                 Subject.doAs(subject, new PrivilegedExceptionAction<Void>() {
 348                                         @Override
 349                                         public Void run() throws Exception {
 350                                                 RemotingServlet.super.service(request, response);
 351                                                 return null;
 352                                         }
 353                                 });
 354                         } catch (PrivilegedActionException e) {
 355                                 throw new CmsException("Cannot process JCR remoting request",
 356                                                 e.getException());
 357                         }
 358                 }
 359         }
 360 }