NodeUserAdmin.java

   1 package org.argeo.cms.internal.osgi;
   2
   3 import java.io.IOException;
   4 import java.net.Inet6Address;
   5 import java.net.InetAddress;
   6 import java.net.URI;
   7 import java.net.URISyntaxException;
   8 import java.nio.file.Files;
   9 import java.nio.file.Path;
  10 import java.security.PrivilegedExceptionAction;
  11 import java.util.ArrayList;
  12 import java.util.Dictionary;
  13 import java.util.HashMap;
  14 import java.util.Hashtable;
  15 import java.util.Iterator;
  16 import java.util.Map;
  17 import java.util.Set;
  18
  19 import javax.naming.ldap.LdapName;
  20 import javax.security.auth.Subject;
  21 import javax.security.auth.callback.Callback;
  22 import javax.security.auth.callback.CallbackHandler;
  23 import javax.security.auth.callback.NameCallback;
  24 import javax.security.auth.callback.UnsupportedCallbackException;
  25 import javax.security.auth.kerberos.KerberosPrincipal;
  26 import javax.security.auth.login.LoginContext;
  27 import javax.security.auth.login.LoginException;
  28
  29 import org.apache.commons.httpclient.auth.AuthPolicy;
  30 import org.apache.commons.httpclient.auth.CredentialsProvider;
  31 import org.apache.commons.httpclient.params.DefaultHttpParams;
  32 import org.apache.commons.httpclient.params.HttpMethodParams;
  33 import org.apache.commons.httpclient.params.HttpParams;
  34 import org.argeo.api.cms.CmsAuth;
  35 import org.argeo.api.cms.CmsConstants;
  36 import org.argeo.api.cms.CmsLog;
  37 import org.argeo.cms.internal.http.client.HttpCredentialProvider;
  38 import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
  39 import org.argeo.cms.internal.runtime.KernelConstants;
  40 import org.argeo.cms.internal.runtime.KernelUtils;
  41 import org.argeo.osgi.transaction.WorkControl;
  42 import org.argeo.osgi.transaction.WorkTransaction;
  43 import org.argeo.osgi.useradmin.AbstractUserDirectory;
  44 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
  45 import org.argeo.osgi.useradmin.LdapUserAdmin;
  46 import org.argeo.osgi.useradmin.LdifUserAdmin;
  47 import org.argeo.osgi.useradmin.OsUserDirectory;
  48 import org.argeo.osgi.useradmin.UserAdminConf;
  49 import org.argeo.osgi.useradmin.UserDirectory;
  50 import org.argeo.util.naming.DnsBrowser;
  51 import org.ietf.jgss.GSSCredential;
  52 import org.ietf.jgss.GSSException;
  53 import org.ietf.jgss.GSSManager;
  54 import org.ietf.jgss.GSSName;
  55 import org.ietf.jgss.Oid;
  56 import org.osgi.framework.Constants;
  57 import org.osgi.service.cm.ConfigurationException;
  58 import org.osgi.service.cm.ManagedServiceFactory;
  59 import org.osgi.service.useradmin.Authorization;
  60 import org.osgi.service.useradmin.Group;
  61 import org.osgi.service.useradmin.Role;
  62 import org.osgi.service.useradmin.UserAdmin;
  63
  64 /**
  65  * Aggregates multiple {@link UserDirectory} and integrates them with system
  66  * roles.
  67  */
  68 public class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactory, KernelConstants {
  69         private final static CmsLog log = CmsLog.getLog(NodeUserAdmin.class);
  70
  71         // OSGi
  72         private Map<String, LdapName> pidToBaseDn = new HashMap<>();
  73 //      private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
  74 //      private ServiceRegistration<UserAdmin> userAdminReg;
  75
  76         // JTA
  77 //      private final ServiceTracker<WorkControl, WorkControl> tmTracker;
  78         // private final String cacheName = UserDirectory.class.getName();
  79
  80         // GSS API
  81         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  82         private GSSCredential acceptorCredentials;
  83
  84         private boolean singleUser = false;
  85 //      private boolean systemRolesAvailable = false;
  86
  87 //      CmsUserManagerImpl userManager;
  88         private WorkControl transactionManager;
  89         private WorkTransaction userTransaction;
  90
  91         public NodeUserAdmin() {
  92                 super(CmsConstants.ROLES_BASEDN, CmsConstants.TOKENS_BASEDN);
  93 //              BundleContext bc = Activator.getBundleContext();
  94 //              if (bc != null) {
  95 //                      tmTracker = new ServiceTracker<>(bc, WorkControl.class, null) {
  96 //
  97 //                              @Override
  98 //                              public WorkControl addingService(ServiceReference<WorkControl> reference) {
  99 //                                      WorkControl workControl = super.addingService(reference);
 100 //                                      userManager = new CmsUserManagerImpl();
 101 //                                      userManager.setUserAdmin(NodeUserAdmin.this);
 102 //                                      // FIXME make it more robust
 103 //                                      userManager.setUserTransaction((WorkTransaction) workControl);
 104 //                                      bc.registerService(CmsUserManager.class, userManager, null);
 105 //                                      return workControl;
 106 //                              }
 107 //                      };
 108 //                      tmTracker.open();
 109 //              } else {
 110 //                      tmTracker = null;
 111 //              }
 112         }
 113
 114         public void init() {
 115         }
 116
 117         public void destroy() {
 118         }
 119
 120         @Override
 121         public void updated(String pid, Dictionary<String, ?> properties) throws ConfigurationException {
 122                 String uri = (String) properties.get(UserAdminConf.uri.name());
 123                 Object realm = properties.get(UserAdminConf.realm.name());
 124                 URI u;
 125                 try {
 126                         if (uri == null) {
 127                                 String baseDn = (String) properties.get(UserAdminConf.baseDn.name());
 128                                 u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
 129                         } else if (realm != null) {
 130                                 u = null;
 131                         } else {
 132                                 u = new URI(uri);
 133                         }
 134                 } catch (URISyntaxException e) {
 135                         throw new IllegalArgumentException("Badly formatted URI " + uri, e);
 136                 }
 137
 138                 // Create
 139                 AbstractUserDirectory userDirectory;
 140                 if (realm != null || UserAdminConf.SCHEME_LDAP.equals(u.getScheme())
 141                                 || UserAdminConf.SCHEME_LDAPS.equals(u.getScheme())) {
 142                         userDirectory = new LdapUserAdmin(properties);
 143                 } else if (UserAdminConf.SCHEME_FILE.equals(u.getScheme())) {
 144                         userDirectory = new LdifUserAdmin(u, properties);
 145                 } else if (UserAdminConf.SCHEME_OS.equals(u.getScheme())) {
 146                         userDirectory = new OsUserDirectory(u, properties);
 147                         singleUser = true;
 148                 } else {
 149                         throw new IllegalArgumentException("Unsupported scheme " + u.getScheme());
 150                 }
 151                 addUserDirectory(userDirectory);
 152
 153                 // OSGi
 154                 LdapName baseDn = userDirectory.getBaseDn();
 155                 Hashtable<String, Object> regProps = new Hashtable<>();
 156                 regProps.put(Constants.SERVICE_PID, pid);
 157                 if (isSystemRolesBaseDn(baseDn))
 158                         regProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 159                 regProps.put(UserAdminConf.baseDn.name(), baseDn);
 160                 // ServiceRegistration<UserDirectory> reg =
 161                 // bc.registerService(UserDirectory.class, userDirectory, regProps);
 162                 CmsActivator.getBundleContext().registerService(UserDirectory.class, userDirectory, regProps);
 163 //              userManager.addUserDirectory(userDirectory, regProps);
 164                 pidToBaseDn.put(pid, baseDn);
 165                 // pidToServiceRegs.put(pid, reg);
 166
 167                 if (log.isDebugEnabled()) {
 168                         log.debug("User directory " + userDirectory.getBaseDn() + (u != null ? " [" + u.getScheme() + "]" : "")
 169                                         + " enabled." + (realm != null ? " " + realm + " realm." : ""));
 170                 }
 171
 172                 if (isSystemRolesBaseDn(baseDn)) {
 173                         addStandardSystemRoles();
 174
 175                         // publishes itself as user admin only when system roles are available
 176                         Dictionary<String, Object> userAdminregProps = new Hashtable<>();
 177                         userAdminregProps.put(CmsConstants.CN, CmsConstants.DEFAULT);
 178                         userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 179                         CmsActivator.getBundleContext().registerService(UserAdmin.class, this, userAdminregProps);
 180                 }
 181
 182 //              if (isSystemRolesBaseDn(baseDn))
 183 //                      systemRolesAvailable = true;
 184 //
 185 //              // start publishing only when system roles are available
 186 //              if (systemRolesAvailable) {
 187 //                      // The list of baseDns is published as properties
 188 //                      // TODO clients should rather reference USerDirectory services
 189 //                      if (userAdminReg != null)
 190 //                              userAdminReg.unregister();
 191 //                      // register self as main user admin
 192 //                      Dictionary<String, Object> userAdminregProps = currentState();
 193 //                      userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
 194 //                      userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 195 //                      userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
 196 //              }
 197         }
 198
 199         private void addStandardSystemRoles() {
 200                 // we assume UserTransaction is already available (TODO make it more robust)
 201                 try {
 202                         userTransaction.begin();
 203                         Role adminRole = getRole(CmsConstants.ROLE_ADMIN);
 204                         if (adminRole == null) {
 205                                 adminRole = createRole(CmsConstants.ROLE_ADMIN, Role.GROUP);
 206                         }
 207                         if (getRole(CmsConstants.ROLE_USER_ADMIN) == null) {
 208                                 Group userAdminRole = (Group) createRole(CmsConstants.ROLE_USER_ADMIN, Role.GROUP);
 209                                 userAdminRole.addMember(adminRole);
 210                         }
 211                         userTransaction.commit();
 212                 } catch (Exception e) {
 213                         try {
 214                                 userTransaction.rollback();
 215                         } catch (Exception e1) {
 216                                 // silent
 217                         }
 218                         throw new IllegalStateException("Cannot add standard system roles", e);
 219                 }
 220         }
 221
 222         @Override
 223         public void deleted(String pid) {
 224                 // assert pidToServiceRegs.get(pid) != null;
 225                 assert pidToBaseDn.get(pid) != null;
 226                 // pidToServiceRegs.remove(pid).unregister();
 227                 LdapName baseDn = pidToBaseDn.remove(pid);
 228                 removeUserDirectory(baseDn);
 229         }
 230
 231         @Override
 232         public String getName() {
 233                 return "Node User Admin";
 234         }
 235
 236         @Override
 237         protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
 238                 if (rawAuthorization.getName() == null) {
 239                         sysRoles.add(CmsConstants.ROLE_ANONYMOUS);
 240                 } else {
 241                         sysRoles.add(CmsConstants.ROLE_USER);
 242                 }
 243         }
 244
 245         protected void postAdd(AbstractUserDirectory userDirectory) {
 246                 // JTA
 247 //              WorkControl tm = tmTracker != null ? tmTracker.getService() : null;
 248 //              if (tm == null)
 249 //                      throw new IllegalStateException("A JTA transaction manager must be available.");
 250                 userDirectory.setTransactionControl(transactionManager);
 251 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 252 //                      EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
 253
 254                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 255                 if (realm != null) {
 256                         if (Files.exists(nodeKeyTab)) {
 257                                 String servicePrincipal = getKerberosServicePrincipal(realm.toString());
 258                                 if (servicePrincipal != null) {
 259                                         CallbackHandler callbackHandler = new CallbackHandler() {
 260                                                 @Override
 261                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 262                                                         for (Callback callback : callbacks)
 263                                                                 if (callback instanceof NameCallback)
 264                                                                         ((NameCallback) callback).setName(servicePrincipal);
 265
 266                                                 }
 267                                         };
 268                                         try {
 269                                                 LoginContext nodeLc = new LoginContext(CmsAuth.LOGIN_CONTEXT_NODE, callbackHandler);
 270                                                 nodeLc.login();
 271                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 272                                         } catch (LoginException e) {
 273                                                 throw new IllegalStateException("Cannot log in kernel", e);
 274                                         }
 275                                 }
 276                         }
 277
 278                         // Register client-side SPNEGO auth scheme
 279                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 280                         HttpParams params = DefaultHttpParams.getDefaultParams();
 281                         ArrayList<String> schemes = new ArrayList<>();
 282                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 283                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 284                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 285                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 286                         params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
 287                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 288                 }
 289         }
 290
 291         protected void preDestroy(AbstractUserDirectory userDirectory) {
 292 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 293 //                      EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
 294
 295                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 296                 if (realm != null) {
 297                         if (acceptorCredentials != null) {
 298                                 try {
 299                                         acceptorCredentials.dispose();
 300                                 } catch (GSSException e) {
 301                                         // silent
 302                                 }
 303                                 acceptorCredentials = null;
 304                         }
 305                 }
 306         }
 307
 308         private String getKerberosServicePrincipal(String realm) {
 309                 String hostname;
 310                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 311                         InetAddress localhost = InetAddress.getLocalHost();
 312                         hostname = localhost.getHostName();
 313                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 314                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 315                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 316                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 317                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 318                                 return KernelConstants.DEFAULT_KERBEROS_SERVICE + "/" + hostname + "@" + kerberosDomain;
 319                         } else
 320                                 return null;
 321                 } catch (Exception e) {
 322                         log.warn("Exception when determining kerberos principal", e);
 323                         return null;
 324                 }
 325         }
 326
 327         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 328                 // GSS
 329                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 330                 if (!krb5It.hasNext())
 331                         return null;
 332                 KerberosPrincipal krb5Principal = null;
 333                 while (krb5It.hasNext()) {
 334                         KerberosPrincipal principal = krb5It.next();
 335                         if (principal.getName().equals(servicePrincipal))
 336                                 krb5Principal = principal;
 337                 }
 338
 339                 if (krb5Principal == null)
 340                         return null;
 341
 342                 GSSManager manager = GSSManager.getInstance();
 343                 try {
 344                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 345                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 346
 347                                 @Override
 348                                 public GSSCredential run() throws GSSException {
 349                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 350                                                         GSSCredential.ACCEPT_ONLY);
 351
 352                                 }
 353
 354                         });
 355                         if (log.isDebugEnabled())
 356                                 log.debug("GSS acceptor configured for " + krb5Principal);
 357                         return serverCredentials;
 358                 } catch (Exception gsse) {
 359                         throw new IllegalStateException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 360                 }
 361         }
 362
 363         public GSSCredential getAcceptorCredentials() {
 364                 return acceptorCredentials;
 365         }
 366
 367         public boolean hasAcceptorCredentials() {
 368                 return acceptorCredentials != null;
 369         }
 370
 371         public boolean isSingleUser() {
 372                 return singleUser;
 373         }
 374
 375         public void setTransactionManager(WorkControl transactionManager) {
 376                 this.transactionManager = transactionManager;
 377         }
 378
 379         public void setUserTransaction(WorkTransaction userTransaction) {
 380                 this.userTransaction = userTransaction;
 381         }
 382
 383         /*
 384          * STATIC
 385          */
 386
 387         public final static Oid KERBEROS_OID;
 388         static {
 389                 try {
 390                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 391                 } catch (GSSException e) {
 392                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 393                 }
 394         }
 395 }