NodeUserAdmin.java

   1 package org.argeo.cms.internal.kernel;
   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.apache.commons.logging.Log;
  35 import org.apache.commons.logging.LogFactory;
  36 import org.argeo.api.NodeConstants;
  37 import org.argeo.cms.internal.http.client.HttpCredentialProvider;
  38 import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
  39 import org.argeo.naming.DnsBrowser;
  40 import org.argeo.osgi.transaction.WorkControl;
  41 import org.argeo.osgi.useradmin.AbstractUserDirectory;
  42 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
  43 import org.argeo.osgi.useradmin.LdapUserAdmin;
  44 import org.argeo.osgi.useradmin.LdifUserAdmin;
  45 import org.argeo.osgi.useradmin.OsUserDirectory;
  46 import org.argeo.osgi.useradmin.UserAdminConf;
  47 import org.argeo.osgi.useradmin.UserDirectory;
  48 import org.ietf.jgss.GSSCredential;
  49 import org.ietf.jgss.GSSException;
  50 import org.ietf.jgss.GSSManager;
  51 import org.ietf.jgss.GSSName;
  52 import org.ietf.jgss.Oid;
  53 import org.osgi.framework.BundleContext;
  54 import org.osgi.framework.Constants;
  55 import org.osgi.service.cm.ConfigurationException;
  56 import org.osgi.service.cm.ManagedServiceFactory;
  57 import org.osgi.service.useradmin.Authorization;
  58 import org.osgi.service.useradmin.UserAdmin;
  59 import org.osgi.util.tracker.ServiceTracker;
  60
  61 /**
  62  * Aggregates multiple {@link UserDirectory} and integrates them with system
  63  * roles.
  64  */
  65 class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactory, KernelConstants {
  66         private final static Log log = LogFactory.getLog(NodeUserAdmin.class);
  67 //      private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  68
  69         // OSGi
  70         private Map<String, LdapName> pidToBaseDn = new HashMap<>();
  71 //      private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
  72 //      private ServiceRegistration<UserAdmin> userAdminReg;
  73
  74         // JTA
  75         private final ServiceTracker<WorkControl, WorkControl> tmTracker;
  76         // private final String cacheName = UserDirectory.class.getName();
  77
  78         // GSS API
  79         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  80         private GSSCredential acceptorCredentials;
  81
  82         private boolean singleUser = false;
  83 //      private boolean systemRolesAvailable = false;
  84
  85         public NodeUserAdmin(String systemRolesBaseDn, String tokensBaseDn) {
  86                 super(systemRolesBaseDn, tokensBaseDn);
  87                 BundleContext bc = Activator.getBundleContext();
  88                 if (bc != null) {
  89                         tmTracker = new ServiceTracker<>(bc, WorkControl.class, null);
  90                         tmTracker.open();
  91                 } else {
  92                         tmTracker = null;
  93                 }
  94         }
  95
  96         @Override
  97         public void updated(String pid, Dictionary<String, ?> properties) throws ConfigurationException {
  98                 String uri = (String) properties.get(UserAdminConf.uri.name());
  99                 Object realm = properties.get(UserAdminConf.realm.name());
 100                 URI u;
 101                 try {
 102                         if (uri == null) {
 103                                 String baseDn = (String) properties.get(UserAdminConf.baseDn.name());
 104                                 u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
 105                         } else if (realm != null) {
 106                                 u = null;
 107                         } else {
 108                                 u = new URI(uri);
 109                         }
 110                 } catch (URISyntaxException e) {
 111                         throw new IllegalArgumentException("Badly formatted URI " + uri, e);
 112                 }
 113
 114                 // Create
 115                 AbstractUserDirectory userDirectory;
 116                 if (realm != null || UserAdminConf.SCHEME_LDAP.equals(u.getScheme())
 117                                 || UserAdminConf.SCHEME_LDAPS.equals(u.getScheme())) {
 118                         userDirectory = new LdapUserAdmin(properties);
 119                 } else if (UserAdminConf.SCHEME_FILE.equals(u.getScheme())) {
 120                         userDirectory = new LdifUserAdmin(u, properties);
 121                 } else if (UserAdminConf.SCHEME_OS.equals(u.getScheme())) {
 122                         userDirectory = new OsUserDirectory(u, properties);
 123                         singleUser = true;
 124                 } else {
 125                         throw new IllegalArgumentException("Unsupported scheme " + u.getScheme());
 126                 }
 127                 addUserDirectory(userDirectory);
 128
 129                 // OSGi
 130                 LdapName baseDn = userDirectory.getBaseDn();
 131                 Dictionary<String, Object> regProps = new Hashtable<>();
 132                 regProps.put(Constants.SERVICE_PID, pid);
 133                 if (isSystemRolesBaseDn(baseDn))
 134                         regProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 135                 regProps.put(UserAdminConf.baseDn.name(), baseDn);
 136                 // ServiceRegistration<UserDirectory> reg =
 137                 // bc.registerService(UserDirectory.class, userDirectory, regProps);
 138                 Activator.registerService(UserDirectory.class, userDirectory, regProps);
 139                 pidToBaseDn.put(pid, baseDn);
 140                 // pidToServiceRegs.put(pid, reg);
 141
 142                 if (log.isDebugEnabled()) {
 143                         log.debug("User directory " + userDirectory.getBaseDn() + (u != null ? " [" + u.getScheme() + "]" : "")
 144                                         + " enabled." + (realm != null ? " " + realm + " realm." : ""));
 145                 }
 146
 147                 if (isSystemRolesBaseDn(baseDn)) {
 148                         // publishes only when system roles are available
 149                         Dictionary<String, Object> userAdminregProps = new Hashtable<>();
 150                         userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
 151                         userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 152                         Activator.registerService(UserAdmin.class, this, userAdminregProps);
 153                 }
 154
 155 //              if (isSystemRolesBaseDn(baseDn))
 156 //                      systemRolesAvailable = true;
 157 //
 158 //              // start publishing only when system roles are available
 159 //              if (systemRolesAvailable) {
 160 //                      // The list of baseDns is published as properties
 161 //                      // TODO clients should rather reference USerDirectory services
 162 //                      if (userAdminReg != null)
 163 //                              userAdminReg.unregister();
 164 //                      // register self as main user admin
 165 //                      Dictionary<String, Object> userAdminregProps = currentState();
 166 //                      userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
 167 //                      userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 168 //                      userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
 169 //              }
 170         }
 171
 172         @Override
 173         public void deleted(String pid) {
 174                 // assert pidToServiceRegs.get(pid) != null;
 175                 assert pidToBaseDn.get(pid) != null;
 176                 // pidToServiceRegs.remove(pid).unregister();
 177                 LdapName baseDn = pidToBaseDn.remove(pid);
 178                 removeUserDirectory(baseDn);
 179         }
 180
 181         @Override
 182         public String getName() {
 183                 return "Node User Admin";
 184         }
 185
 186         @Override
 187         protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
 188                 if (rawAuthorization.getName() == null) {
 189                         sysRoles.add(NodeConstants.ROLE_ANONYMOUS);
 190                 } else {
 191                         sysRoles.add(NodeConstants.ROLE_USER);
 192                 }
 193         }
 194
 195         protected void postAdd(AbstractUserDirectory userDirectory) {
 196                 // JTA
 197                 WorkControl tm = tmTracker != null ? tmTracker.getService() : null;
 198                 if (tm == null)
 199                         throw new IllegalStateException("A JTA transaction manager must be available.");
 200                 userDirectory.setTransactionControl(tm);
 201 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 202 //                      EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
 203
 204                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 205                 if (realm != null) {
 206                         if (Files.exists(nodeKeyTab)) {
 207                                 String servicePrincipal = getKerberosServicePrincipal(realm.toString());
 208                                 if (servicePrincipal != null) {
 209                                         CallbackHandler callbackHandler = new CallbackHandler() {
 210                                                 @Override
 211                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 212                                                         for (Callback callback : callbacks)
 213                                                                 if (callback instanceof NameCallback)
 214                                                                         ((NameCallback) callback).setName(servicePrincipal);
 215
 216                                                 }
 217                                         };
 218                                         try {
 219                                                 LoginContext nodeLc = new LoginContext(NodeConstants.LOGIN_CONTEXT_NODE, callbackHandler);
 220                                                 nodeLc.login();
 221                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 222                                         } catch (LoginException e) {
 223                                                 throw new IllegalStateException("Cannot log in kernel", e);
 224                                         }
 225                                 }
 226                         }
 227
 228                         // Register client-side SPNEGO auth scheme
 229                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 230                         HttpParams params = DefaultHttpParams.getDefaultParams();
 231                         ArrayList<String> schemes = new ArrayList<>();
 232                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 233                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 234                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 235                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 236                         params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
 237                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 238                 }
 239         }
 240
 241         protected void preDestroy(AbstractUserDirectory userDirectory) {
 242 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 243 //                      EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
 244
 245                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 246                 if (realm != null) {
 247                         if (acceptorCredentials != null) {
 248                                 try {
 249                                         acceptorCredentials.dispose();
 250                                 } catch (GSSException e) {
 251                                         // silent
 252                                 }
 253                                 acceptorCredentials = null;
 254                         }
 255                 }
 256         }
 257
 258         private String getKerberosServicePrincipal(String realm) {
 259                 String hostname;
 260                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 261                         InetAddress localhost = InetAddress.getLocalHost();
 262                         hostname = localhost.getHostName();
 263                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 264                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 265                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 266                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 267                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 268                                 return KernelConstants.DEFAULT_KERBEROS_SERVICE + "/" + hostname + "@" + kerberosDomain;
 269                         } else
 270                                 return null;
 271                 } catch (Exception e) {
 272                         log.warn("Exception when determining kerberos principal", e);
 273                         return null;
 274                 }
 275         }
 276
 277         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 278                 // GSS
 279                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 280                 if (!krb5It.hasNext())
 281                         return null;
 282                 KerberosPrincipal krb5Principal = null;
 283                 while (krb5It.hasNext()) {
 284                         KerberosPrincipal principal = krb5It.next();
 285                         if (principal.getName().equals(servicePrincipal))
 286                                 krb5Principal = principal;
 287                 }
 288
 289                 if (krb5Principal == null)
 290                         return null;
 291
 292                 GSSManager manager = GSSManager.getInstance();
 293                 try {
 294                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 295                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 296
 297                                 @Override
 298                                 public GSSCredential run() throws GSSException {
 299                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 300                                                         GSSCredential.ACCEPT_ONLY);
 301
 302                                 }
 303
 304                         });
 305                         if (log.isDebugEnabled())
 306                                 log.debug("GSS acceptor configured for " + krb5Principal);
 307                         return serverCredentials;
 308                 } catch (Exception gsse) {
 309                         throw new IllegalStateException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 310                 }
 311         }
 312
 313         public GSSCredential getAcceptorCredentials() {
 314                 return acceptorCredentials;
 315         }
 316
 317         public boolean isSingleUser() {
 318                 return singleUser;
 319         }
 320
 321         public final static Oid KERBEROS_OID;
 322         static {
 323                 try {
 324                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 325                 } catch (GSSException e) {
 326                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 327                 }
 328         }
 329
 330 }