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
  18 import javax.naming.ldap.LdapName;
  19 import javax.security.auth.Subject;
  20 import javax.security.auth.callback.Callback;
  21 import javax.security.auth.callback.CallbackHandler;
  22 import javax.security.auth.callback.NameCallback;
  23 import javax.security.auth.callback.UnsupportedCallbackException;
  24 import javax.security.auth.kerberos.KerberosPrincipal;
  25 import javax.security.auth.login.LoginContext;
  26 import javax.security.auth.login.LoginException;
  27 import javax.transaction.TransactionManager;
  28
  29 import org.apache.commons.httpclient.auth.AuthPolicy;
  30 import org.apache.commons.httpclient.auth.CredentialsProvider;
  31 import org.apache.commons.httpclient.cookie.CookiePolicy;
  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.NodeHttp;
  39 import org.argeo.cms.internal.http.client.HttpCredentialProvider;
  40 import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
  41 import org.argeo.naming.DnsBrowser;
  42 import org.argeo.node.NodeConstants;
  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.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.UserAdmin;
  61 import org.osgi.util.tracker.ServiceTracker;
  62
  63 import bitronix.tm.BitronixTransactionManager;
  64 import bitronix.tm.resource.ehcache.EhCacheXAResourceProducer;
  65
  66 /**
  67  * Aggregates multiple {@link UserDirectory} and integrates them with system
  68  * roles.
  69  */
  70 class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactory, KernelConstants {
  71         private final static Log log = LogFactory.getLog(NodeUserAdmin.class);
  72         private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  73
  74         // OSGi
  75         private Map<String, LdapName> pidToBaseDn = new HashMap<>();
  76         private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
  77         private ServiceRegistration<UserAdmin> userAdminReg;
  78
  79         // JTA
  80         private final ServiceTracker<TransactionManager, TransactionManager> tmTracker;
  81         private final String cacheName = UserDirectory.class.getName();
  82
  83         // GSS API
  84         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  85         private GSSCredential acceptorCredentials;
  86
  87         public NodeUserAdmin(String systemRolesBaseDn) {
  88                 super(systemRolesBaseDn);
  89                 tmTracker = new ServiceTracker<>(bc, TransactionManager.class, null);
  90                 tmTracker.open();
  91         }
  92
  93         @Override
  94         public void updated(String pid, Dictionary<String, ?> properties) throws ConfigurationException {
  95                 String uri = (String) properties.get(UserAdminConf.uri.name());
  96                 URI u;
  97                 try {
  98                         u = new URI(uri);
  99                 } catch (URISyntaxException e) {
 100                         throw new CmsException("Badly formatted URI " + uri, e);
 101                 }
 102
 103                 // Create
 104                 AbstractUserDirectory userDirectory = u.getScheme().equals("ldap") ? new LdapUserAdmin(properties)
 105                                 : new LdifUserAdmin(properties);
 106                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 107                 addUserDirectory(userDirectory);
 108
 109                 // OSGi
 110                 LdapName baseDn = userDirectory.getBaseDn();
 111                 Dictionary<String, Object> regProps = new Hashtable<>();
 112                 regProps.put(Constants.SERVICE_PID, pid);
 113                 if (isSystemRolesBaseDn(baseDn))
 114                         regProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 115                 regProps.put(UserAdminConf.baseDn.name(), baseDn);
 116                 ServiceRegistration<UserDirectory> reg = bc.registerService(UserDirectory.class, userDirectory, regProps);
 117                 pidToBaseDn.put(pid, baseDn);
 118                 pidToServiceRegs.put(pid, reg);
 119
 120                 if (log.isDebugEnabled())
 121                         log.debug("User directory " + userDirectory.getBaseDn() + " [" + u.getScheme() + "] enabled."
 122                                         + (realm != null ? " " + realm + " realm." : ""));
 123
 124                 if (!isSystemRolesBaseDn(baseDn)) {
 125                         if (userAdminReg != null)
 126                                 userAdminReg.unregister();
 127                         // register self as main user admin
 128                         Dictionary<String, Object> userAdminregProps = currentState();
 129                         userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
 130                         userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
 131                         userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
 132                 }
 133         }
 134
 135         @Override
 136         public void deleted(String pid) {
 137                 assert pidToServiceRegs.get(pid) != null;
 138                 assert pidToBaseDn.get(pid) != null;
 139                 pidToServiceRegs.remove(pid).unregister();
 140                 LdapName baseDn = pidToBaseDn.remove(pid);
 141                 removeUserDirectory(baseDn);
 142         }
 143
 144         @Override
 145         public String getName() {
 146                 return "Node User Admin";
 147         }
 148
 149         protected void postAdd(AbstractUserDirectory userDirectory) {
 150                 // JTA
 151                 TransactionManager tm = tmTracker.getService();
 152                 if (tm == null)
 153                         throw new CmsException("A JTA transaction manager must be available.");
 154                 userDirectory.setTransactionManager(tm);
 155                 if (tmTracker.getService() instanceof BitronixTransactionManager)
 156                         EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
 157
 158                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 159                 if (realm != null) {
 160                         if (Files.exists(nodeKeyTab)) {
 161                                 String servicePrincipal = getKerberosServicePrincipal(realm.toString());
 162                                 if (servicePrincipal != null) {
 163                                         CallbackHandler callbackHandler = new CallbackHandler() {
 164                                                 @Override
 165                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 166                                                         for (Callback callback : callbacks)
 167                                                                 if (callback instanceof NameCallback)
 168                                                                         ((NameCallback) callback).setName(servicePrincipal);
 169
 170                                                 }
 171                                         };
 172                                         try {
 173                                                 LoginContext nodeLc = new LoginContext(NodeConstants.LOGIN_CONTEXT_NODE, callbackHandler);
 174                                                 nodeLc.login();
 175                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 176                                         } catch (LoginException e) {
 177                                                 throw new CmsException("Cannot log in kernel", e);
 178                                         }
 179                                 }
 180                         }
 181
 182                         // Register client-side SPNEGO auth scheme
 183                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 184                         HttpParams params = DefaultHttpParams.getDefaultParams();
 185                         ArrayList<String> schemes = new ArrayList<>();
 186                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 187                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 188                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 189                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 190                         params.setParameter(HttpMethodParams.COOKIE_POLICY, CookiePolicy.BROWSER_COMPATIBILITY);
 191                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 192                 }
 193         }
 194
 195         protected void preDestroy(AbstractUserDirectory userDirectory) {
 196                 if (tmTracker.getService() instanceof BitronixTransactionManager)
 197                         EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
 198
 199                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 200                 if (realm != null) {
 201                         if (acceptorCredentials != null) {
 202                                 try {
 203                                         acceptorCredentials.dispose();
 204                                 } catch (GSSException e) {
 205                                         // silent
 206                                 }
 207                                 acceptorCredentials = null;
 208                         }
 209                 }
 210         }
 211
 212         private String getKerberosServicePrincipal(String realm) {
 213                 String hostname;
 214                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 215                         InetAddress localhost = InetAddress.getLocalHost();
 216                         hostname = localhost.getHostName();
 217                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 218                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 219                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 220                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 221                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 222                                 return NodeHttp.DEFAULT_SERVICE + "/" + hostname + "@" + kerberosDomain;
 223                         } else
 224                                 return null;
 225                 } catch (Exception e) {
 226                         log.warn("Exception when determining kerberos principal", e);
 227                         return null;
 228                 }
 229         }
 230
 231         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 232                 // GSS
 233                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 234                 if (!krb5It.hasNext())
 235                         return null;
 236                 KerberosPrincipal krb5Principal = null;
 237                 while (krb5It.hasNext()) {
 238                         KerberosPrincipal principal = krb5It.next();
 239                         if (principal.getName().equals(servicePrincipal))
 240                                 krb5Principal = principal;
 241                 }
 242
 243                 if (krb5Principal == null)
 244                         return null;
 245
 246                 GSSManager manager = GSSManager.getInstance();
 247                 try {
 248                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 249                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 250
 251                                 @Override
 252                                 public GSSCredential run() throws GSSException {
 253                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 254                                                         GSSCredential.ACCEPT_ONLY);
 255
 256                                 }
 257
 258                         });
 259                         if (log.isDebugEnabled())
 260                                 log.debug("GSS acceptor configured for " + krb5Principal);
 261                         return serverCredentials;
 262                 } catch (Exception gsse) {
 263                         throw new CmsException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 264                 }
 265         }
 266
 267         public GSSCredential getAcceptorCredentials() {
 268                 return acceptorCredentials;
 269         }
 270
 271         public final static Oid KERBEROS_OID;
 272         static {
 273                 try {
 274                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 275                 } catch (GSSException e) {
 276                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 277                 }
 278         }
 279
 280 }