org.argeo.cms/src/org/argeo/cms/internal/kernel/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 import javax.transaction.TransactionManager;
  29
  30 import org.apache.commons.httpclient.auth.AuthPolicy;
  31 import org.apache.commons.httpclient.auth.CredentialsProvider;
  32 import org.apache.commons.httpclient.params.DefaultHttpParams;
  33 import org.apache.commons.httpclient.params.HttpMethodParams;
  34 import org.apache.commons.httpclient.params.HttpParams;
  35 import org.apache.commons.logging.Log;
  36 import org.apache.commons.logging.LogFactory;
  37 import org.argeo.cms.CmsException;
  38 import org.argeo.cms.internal.http.client.HttpCredentialProvider;
  39 import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
  40 import org.argeo.naming.DnsBrowser;
  41 import org.argeo.node.NodeConstants;
  42 import org.argeo.osgi.useradmin.AbstractUserDirectory;
  43 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
  44 import org.argeo.osgi.useradmin.LdapUserAdmin;
  45 import org.argeo.osgi.useradmin.LdifUserAdmin;
  46 import org.argeo.osgi.useradmin.OsUserDirectory;
  47 import org.argeo.osgi.useradmin.UserAdminConf;
  48 import org.argeo.osgi.useradmin.UserDirectory;
  49 import org.ietf.jgss.GSSCredential;
  50 import org.ietf.jgss.GSSException;
  51 import org.ietf.jgss.GSSManager;
  52 import org.ietf.jgss.GSSName;
  53 import org.ietf.jgss.Oid;
  54 import org.osgi.framework.BundleContext;
  55 import org.osgi.framework.Constants;
  56 import org.osgi.framework.FrameworkUtil;
  57 import org.osgi.framework.ServiceRegistration;
  58 import org.osgi.service.cm.ConfigurationException;
  59 import org.osgi.service.cm.ManagedServiceFactory;
  60 import org.osgi.service.useradmin.Authorization;
  61 import org.osgi.service.useradmin.UserAdmin;
  62 import org.osgi.util.tracker.ServiceTracker;
  63
  64 /**
  65  * Aggregates multiple {@link UserDirectory} and integrates them with system
  66  * roles.
  67  */
  68 class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactory, KernelConstants {
  69         private final static Log log = LogFactory.getLog(NodeUserAdmin.class);
  70         private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  71
  72         // OSGi
  73         private Map<String, LdapName> pidToBaseDn = new HashMap<>();
  74         private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
  75         private ServiceRegistration<UserAdmin> userAdminReg;
  76
  77         // JTA
  78         private final ServiceTracker<TransactionManager, TransactionManager> tmTracker;
  79         // private final String cacheName = UserDirectory.class.getName();
  80
  81         // GSS API
  82         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  83         private GSSCredential acceptorCredentials;
  84
  85         private boolean singleUser = false;
  86         private boolean systemRolesAvailable = false;
  87
  88         public NodeUserAdmin(String systemRolesBaseDn) {
  89                 super(systemRolesBaseDn);
  90                 tmTracker = new ServiceTracker<>(bc, TransactionManager.class, null);
  91                 tmTracker.open();
  92         }
  93
  94         @Override
  95         public void updated(String pid, Dictionary<String, ?> properties) throws ConfigurationException {
  96                 String uri = (String) properties.get(UserAdminConf.uri.name());
  97                 URI u;
  98                 try {
  99                         if (uri == null) {
 100                                 String baseDn = (String) properties.get(UserAdminConf.baseDn.name());
 101                                 u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
 102                         } else
 103                                 u = new URI(uri);
 104                 } catch (URISyntaxException e) {
 105                         throw new CmsException("Badly formatted URI " + uri, e);
 106                 }
 107
 108                 // Create
 109                 AbstractUserDirectory userDirectory;
 110                 if (UserAdminConf.SCHEME_LDAP.equals(u.getScheme())) {
 111                         userDirectory = new LdapUserAdmin(properties);
 112                 } else if (UserAdminConf.SCHEME_FILE.equals(u.getScheme())) {
 113                         userDirectory = new LdifUserAdmin(u, properties);
 114                 } else if (UserAdminConf.SCHEME_OS.equals(u.getScheme())) {
 115                         userDirectory = new OsUserDirectory(u, properties);
 116                         singleUser = true;
 117                 } else {
 118                         throw new CmsException("Unsupported scheme " + u.getScheme());
 119                 }
 120                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 121                 addUserDirectory(userDirectory);
 122
 123                 // OSGi
 124                 LdapName baseDn = userDirectory.getBaseDn();
 125                 Dictionary<String, Object> regProps = new Hashtable<>();
 126                 regProps.put(Constants.SERVICE_PID, pid);
 127                 if (isSystemRolesBaseDn(baseDn))
 128                         regProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 129                 regProps.put(UserAdminConf.baseDn.name(), baseDn);
 130                 ServiceRegistration<UserDirectory> reg = bc.registerService(UserDirectory.class, userDirectory, regProps);
 131                 pidToBaseDn.put(pid, baseDn);
 132                 pidToServiceRegs.put(pid, reg);
 133
 134                 if (log.isDebugEnabled())
 135                         log.debug("User directory " + userDirectory.getBaseDn() + " [" + u.getScheme() + "] enabled."
 136                                         + (realm != null ? " " + realm + " realm." : ""));
 137
 138                 if (isSystemRolesBaseDn(baseDn))
 139                         systemRolesAvailable = true;
 140
 141                 // start publishing only when system roles are available
 142                 if (systemRolesAvailable) {
 143                         // The list of baseDns is published as properties
 144                         // TODO clients should rather reference USerDirectory services
 145                         if (userAdminReg != null)
 146                                 userAdminReg.unregister();
 147                         // register self as main user admin
 148                         Dictionary<String, Object> userAdminregProps = currentState();
 149                         userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
 150                         userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 151                         userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
 152                 }
 153         }
 154
 155         @Override
 156         public void deleted(String pid) {
 157                 assert pidToServiceRegs.get(pid) != null;
 158                 assert pidToBaseDn.get(pid) != null;
 159                 pidToServiceRegs.remove(pid).unregister();
 160                 LdapName baseDn = pidToBaseDn.remove(pid);
 161                 removeUserDirectory(baseDn);
 162         }
 163
 164         @Override
 165         public String getName() {
 166                 return "Node User Admin";
 167         }
 168
 169         @Override
 170         protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
 171                 if (rawAuthorization.getName() == null) {
 172                         sysRoles.add(NodeConstants.ROLE_ANONYMOUS);
 173                 } else {
 174                         sysRoles.add(NodeConstants.ROLE_USER);
 175                 }
 176         }
 177
 178         protected void postAdd(AbstractUserDirectory userDirectory) {
 179                 // JTA
 180                 TransactionManager tm = tmTracker.getService();
 181                 if (tm == null)
 182                         throw new CmsException("A JTA transaction manager must be available.");
 183                 userDirectory.setTransactionManager(tm);
 184 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 185 //                      EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
 186
 187                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 188                 if (realm != null) {
 189                         if (Files.exists(nodeKeyTab)) {
 190                                 String servicePrincipal = getKerberosServicePrincipal(realm.toString());
 191                                 if (servicePrincipal != null) {
 192                                         CallbackHandler callbackHandler = new CallbackHandler() {
 193                                                 @Override
 194                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 195                                                         for (Callback callback : callbacks)
 196                                                                 if (callback instanceof NameCallback)
 197                                                                         ((NameCallback) callback).setName(servicePrincipal);
 198
 199                                                 }
 200                                         };
 201                                         try {
 202                                                 LoginContext nodeLc = new LoginContext(NodeConstants.LOGIN_CONTEXT_NODE, callbackHandler);
 203                                                 nodeLc.login();
 204                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 205                                         } catch (LoginException e) {
 206                                                 throw new CmsException("Cannot log in kernel", e);
 207                                         }
 208                                 }
 209                         }
 210
 211                         // Register client-side SPNEGO auth scheme
 212                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 213                         HttpParams params = DefaultHttpParams.getDefaultParams();
 214                         ArrayList<String> schemes = new ArrayList<>();
 215                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 216                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 217                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 218                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 219                         params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
 220                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 221                 }
 222         }
 223
 224         protected void preDestroy(AbstractUserDirectory userDirectory) {
 225 //              if (tmTracker.getService() instanceof BitronixTransactionManager)
 226 //                      EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
 227
 228                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 229                 if (realm != null) {
 230                         if (acceptorCredentials != null) {
 231                                 try {
 232                                         acceptorCredentials.dispose();
 233                                 } catch (GSSException e) {
 234                                         // silent
 235                                 }
 236                                 acceptorCredentials = null;
 237                         }
 238                 }
 239         }
 240
 241         private String getKerberosServicePrincipal(String realm) {
 242                 String hostname;
 243                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 244                         InetAddress localhost = InetAddress.getLocalHost();
 245                         hostname = localhost.getHostName();
 246                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 247                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 248                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 249                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 250                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 251                                 return NodeHttp.DEFAULT_SERVICE + "/" + hostname + "@" + kerberosDomain;
 252                         } else
 253                                 return null;
 254                 } catch (Exception e) {
 255                         log.warn("Exception when determining kerberos principal", e);
 256                         return null;
 257                 }
 258         }
 259
 260         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 261                 // GSS
 262                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 263                 if (!krb5It.hasNext())
 264                         return null;
 265                 KerberosPrincipal krb5Principal = null;
 266                 while (krb5It.hasNext()) {
 267                         KerberosPrincipal principal = krb5It.next();
 268                         if (principal.getName().equals(servicePrincipal))
 269                                 krb5Principal = principal;
 270                 }
 271
 272                 if (krb5Principal == null)
 273                         return null;
 274
 275                 GSSManager manager = GSSManager.getInstance();
 276                 try {
 277                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 278                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 279
 280                                 @Override
 281                                 public GSSCredential run() throws GSSException {
 282                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 283                                                         GSSCredential.ACCEPT_ONLY);
 284
 285                                 }
 286
 287                         });
 288                         if (log.isDebugEnabled())
 289                                 log.debug("GSS acceptor configured for " + krb5Principal);
 290                         return serverCredentials;
 291                 } catch (Exception gsse) {
 292                         throw new CmsException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 293                 }
 294         }
 295
 296         public GSSCredential getAcceptorCredentials() {
 297                 return acceptorCredentials;
 298         }
 299
 300         public boolean isSingleUser() {
 301                 return singleUser;
 302         }
 303
 304         public final static Oid KERBEROS_OID;
 305         static {
 306                 try {
 307                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 308                 } catch (GSSException e) {
 309                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 310                 }
 311         }
 312
 313 }