IPA authentication working.
[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / internal / kernel / NodeUserAdmin.java
index d0cf93d80c21e117cf36aae65c869c44981e1a31..1a9817450ed427deee762ed39f0866d1d6a3942c 100644 (file)
 package org.argeo.cms.internal.kernel;
 
+import java.io.IOException;
+import java.net.Inet6Address;
+import java.net.InetAddress;
 import java.net.URI;
 import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.PrivilegedExceptionAction;
+import java.util.ArrayList;
 import java.util.Dictionary;
 import java.util.HashMap;
 import java.util.Hashtable;
+import java.util.Iterator;
 import java.util.Map;
+import java.util.Set;
 
 import javax.naming.ldap.LdapName;
+import javax.security.auth.Subject;
+import javax.security.auth.callback.Callback;
+import javax.security.auth.callback.CallbackHandler;
+import javax.security.auth.callback.NameCallback;
+import javax.security.auth.callback.UnsupportedCallbackException;
+import javax.security.auth.kerberos.KerberosPrincipal;
+import javax.security.auth.login.LoginContext;
+import javax.security.auth.login.LoginException;
 import javax.transaction.TransactionManager;
 
+import org.apache.commons.httpclient.auth.AuthPolicy;
+import org.apache.commons.httpclient.auth.CredentialsProvider;
+import org.apache.commons.httpclient.params.DefaultHttpParams;
+import org.apache.commons.httpclient.params.HttpMethodParams;
+import org.apache.commons.httpclient.params.HttpParams;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.argeo.cms.CmsException;
-import org.argeo.node.NodeConstants;
+import org.argeo.api.NodeConstants;
+import org.argeo.cms.internal.http.client.HttpCredentialProvider;
+import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
+import org.argeo.naming.DnsBrowser;
 import org.argeo.osgi.useradmin.AbstractUserDirectory;
 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
 import org.argeo.osgi.useradmin.LdapUserAdmin;
 import org.argeo.osgi.useradmin.LdifUserAdmin;
+import org.argeo.osgi.useradmin.OsUserDirectory;
 import org.argeo.osgi.useradmin.UserAdminConf;
 import org.argeo.osgi.useradmin.UserDirectory;
+import org.ietf.jgss.GSSCredential;
+import org.ietf.jgss.GSSException;
+import org.ietf.jgss.GSSManager;
+import org.ietf.jgss.GSSName;
+import org.ietf.jgss.Oid;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.Constants;
-import org.osgi.framework.FrameworkUtil;
-import org.osgi.framework.ServiceRegistration;
 import org.osgi.service.cm.ConfigurationException;
 import org.osgi.service.cm.ManagedServiceFactory;
+import org.osgi.service.useradmin.Authorization;
 import org.osgi.service.useradmin.UserAdmin;
 import org.osgi.util.tracker.ServiceTracker;
 
-import bitronix.tm.BitronixTransactionManager;
-import bitronix.tm.resource.ehcache.EhCacheXAResourceProducer;
-
 /**
  * Aggregates multiple {@link UserDirectory} and integrates them with system
  * roles.
  */
 class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactory, KernelConstants {
        private final static Log log = LogFactory.getLog(NodeUserAdmin.class);
-       private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
+//     private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
 
        // OSGi
        private Map<String, LdapName> pidToBaseDn = new HashMap<>();
-       private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
-       private ServiceRegistration<UserAdmin> userAdminReg;
+//     private Map<String, ServiceRegistration<UserDirectory>> pidToServiceRegs = new HashMap<>();
+//     private ServiceRegistration<UserAdmin> userAdminReg;
 
        // JTA
        private final ServiceTracker<TransactionManager, TransactionManager> tmTracker;
-       private final String cacheName = UserDirectory.class.getName();
+       // private final String cacheName = UserDirectory.class.getName();
+
+       // GSS API
+       private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
+       private GSSCredential acceptorCredentials;
+
+       private boolean singleUser = false;
+//     private boolean systemRolesAvailable = false;
 
-       public NodeUserAdmin(String systemRolesBaseDn) {
-               super(systemRolesBaseDn);
-               tmTracker = new ServiceTracker<>(bc, TransactionManager.class, null);
-               tmTracker.open();
+       public NodeUserAdmin(String systemRolesBaseDn, String tokensBaseDn) {
+               super(systemRolesBaseDn, tokensBaseDn);
+               BundleContext bc = Activator.getBundleContext();
+               if (bc != null) {
+                       tmTracker = new ServiceTracker<>(bc, TransactionManager.class, null);
+                       tmTracker.open();
+               } else {
+                       tmTracker = null;
+               }
        }
 
        @Override
        public void updated(String pid, Dictionary<String, ?> properties) throws ConfigurationException {
                String uri = (String) properties.get(UserAdminConf.uri.name());
+               Object realm = properties.get(UserAdminConf.realm.name());
                URI u;
                try {
-                       u = new URI(uri);
+                       if (uri == null) {
+                               String baseDn = (String) properties.get(UserAdminConf.baseDn.name());
+                               u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
+                       } else if (realm != null) {
+                               u = null;
+                       } else {
+                               u = new URI(uri);
+                       }
                } catch (URISyntaxException e) {
-                       throw new CmsException("Badly formatted URI " + uri, e);
+                       throw new IllegalArgumentException("Badly formatted URI " + uri, e);
                }
 
                // Create
-               AbstractUserDirectory userDirectory = u.getScheme().equals("ldap") ? new LdapUserAdmin(properties)
-                               : new LdifUserAdmin(properties);
+               AbstractUserDirectory userDirectory;
+               if (realm != null || UserAdminConf.SCHEME_LDAP.equals(u.getScheme())
+                               || UserAdminConf.SCHEME_LDAPS.equals(u.getScheme())) {
+                       userDirectory = new LdapUserAdmin(properties);
+               } else if (UserAdminConf.SCHEME_FILE.equals(u.getScheme())) {
+                       userDirectory = new LdifUserAdmin(u, properties);
+               } else if (UserAdminConf.SCHEME_OS.equals(u.getScheme())) {
+                       userDirectory = new OsUserDirectory(u, properties);
+                       singleUser = true;
+               } else {
+                       throw new IllegalArgumentException("Unsupported scheme " + u.getScheme());
+               }
                addUserDirectory(userDirectory);
 
                // OSGi
                LdapName baseDn = userDirectory.getBaseDn();
                Dictionary<String, Object> regProps = new Hashtable<>();
                regProps.put(Constants.SERVICE_PID, pid);
-               if(isSystemRolesBaseDn(baseDn))
+               if (isSystemRolesBaseDn(baseDn))
                        regProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
                regProps.put(UserAdminConf.baseDn.name(), baseDn);
-               ServiceRegistration<UserDirectory> reg = bc.registerService(UserDirectory.class, userDirectory, regProps);
+               // ServiceRegistration<UserDirectory> reg =
+               // bc.registerService(UserDirectory.class, userDirectory, regProps);
+               Activator.registerService(UserDirectory.class, userDirectory, regProps);
                pidToBaseDn.put(pid, baseDn);
-               pidToServiceRegs.put(pid, reg);
+               // pidToServiceRegs.put(pid, reg);
 
-               if (log.isDebugEnabled())
-                       log.debug("User directory " + userDirectory.getBaseDn() + " [" + u.getScheme() + "] enabled.");
+               if (log.isDebugEnabled()) {
+                       log.debug("User directory " + userDirectory.getBaseDn() + (u != null ? " [" + u.getScheme() + "]" : "")
+                                       + " enabled." + (realm != null ? " " + realm + " realm." : ""));
+               }
 
-               if (!isSystemRolesBaseDn(baseDn)) {
-                       if (userAdminReg != null)
-                               userAdminReg.unregister();
-                       // register self as main user admin
-                       Dictionary<String, Object> userAdminregProps = currentState();
+               if (isSystemRolesBaseDn(baseDn)) {
+                       // publishes only when system roles are available
+                       Dictionary<String, Object> userAdminregProps = new Hashtable<>();
                        userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
                        userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
-                       userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
+                       Activator.registerService(UserAdmin.class, this, userAdminregProps);
                }
+
+//             if (isSystemRolesBaseDn(baseDn))
+//                     systemRolesAvailable = true;
+//
+//             // start publishing only when system roles are available
+//             if (systemRolesAvailable) {
+//                     // The list of baseDns is published as properties
+//                     // TODO clients should rather reference USerDirectory services
+//                     if (userAdminReg != null)
+//                             userAdminReg.unregister();
+//                     // register self as main user admin
+//                     Dictionary<String, Object> userAdminregProps = currentState();
+//                     userAdminregProps.put(NodeConstants.CN, NodeConstants.DEFAULT);
+//                     userAdminregProps.put(Constants.SERVICE_RANKING, Integer.MAX_VALUE);
+//                     userAdminReg = bc.registerService(UserAdmin.class, this, userAdminregProps);
+//             }
        }
 
        @Override
        public void deleted(String pid) {
-               assert pidToServiceRegs.get(pid) != null;
+               // assert pidToServiceRegs.get(pid) != null;
                assert pidToBaseDn.get(pid) != null;
-               pidToServiceRegs.remove(pid).unregister();
+               // pidToServiceRegs.remove(pid).unregister();
                LdapName baseDn = pidToBaseDn.remove(pid);
                removeUserDirectory(baseDn);
        }
@@ -109,19 +183,148 @@ class NodeUserAdmin extends AggregatingUserAdmin implements ManagedServiceFactor
                return "Node User Admin";
        }
 
+       @Override
+       protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
+               if (rawAuthorization.getName() == null) {
+                       sysRoles.add(NodeConstants.ROLE_ANONYMOUS);
+               } else {
+                       sysRoles.add(NodeConstants.ROLE_USER);
+               }
+       }
+
        protected void postAdd(AbstractUserDirectory userDirectory) {
                // JTA
-               TransactionManager tm = tmTracker.getService();
+               TransactionManager tm = tmTracker != null ? tmTracker.getService() : null;
                if (tm == null)
-                       throw new CmsException("A JTA transaction manager must be available.");
+                       throw new IllegalStateException("A JTA transaction manager must be available.");
                userDirectory.setTransactionManager(tm);
-               if (tmTracker.getService() instanceof BitronixTransactionManager)
-                       EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
+//             if (tmTracker.getService() instanceof BitronixTransactionManager)
+//                     EhCacheXAResourceProducer.registerXAResource(cacheName, userDirectory.getXaResource());
+
+               Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
+               if (realm != null) {
+                       if (Files.exists(nodeKeyTab)) {
+                               String servicePrincipal = getKerberosServicePrincipal(realm.toString());
+                               if (servicePrincipal != null) {
+                                       CallbackHandler callbackHandler = new CallbackHandler() {
+                                               @Override
+                                               public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
+                                                       for (Callback callback : callbacks)
+                                                               if (callback instanceof NameCallback)
+                                                                       ((NameCallback) callback).setName(servicePrincipal);
+
+                                               }
+                                       };
+                                       try {
+                                               LoginContext nodeLc = new LoginContext(NodeConstants.LOGIN_CONTEXT_NODE, callbackHandler);
+                                               nodeLc.login();
+                                               acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
+                                       } catch (LoginException e) {
+                                               throw new IllegalStateException("Cannot log in kernel", e);
+                                       }
+                               }
+                       }
+
+                       // Register client-side SPNEGO auth scheme
+                       AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
+                       HttpParams params = DefaultHttpParams.getDefaultParams();
+                       ArrayList<String> schemes = new ArrayList<>();
+                       schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
+                       // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
+                       params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
+                       params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
+                       params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
+                       // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
+               }
+       }
+
+       protected void preDestroy(AbstractUserDirectory userDirectory) {
+//             if (tmTracker.getService() instanceof BitronixTransactionManager)
+//                     EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
+
+               Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
+               if (realm != null) {
+                       if (acceptorCredentials != null) {
+                               try {
+                                       acceptorCredentials.dispose();
+                               } catch (GSSException e) {
+                                       // silent
+                               }
+                               acceptorCredentials = null;
+                       }
+               }
        }
 
-       protected void preDestroy(UserDirectory userDirectory) {
-               if (tmTracker.getService() instanceof BitronixTransactionManager)
-                       EhCacheXAResourceProducer.unregisterXAResource(cacheName, userDirectory.getXaResource());
+       private String getKerberosServicePrincipal(String realm) {
+               String hostname;
+               try (DnsBrowser dnsBrowser = new DnsBrowser()) {
+                       InetAddress localhost = InetAddress.getLocalHost();
+                       hostname = localhost.getHostName();
+                       String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
+                       String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
+                       boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
+                       String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
+                       if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
+                               return KernelConstants.DEFAULT_KERBEROS_SERVICE + "/" + hostname + "@" + kerberosDomain;
+                       } else
+                               return null;
+               } catch (Exception e) {
+                       log.warn("Exception when determining kerberos principal", e);
+                       return null;
+               }
+       }
+
+       private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
+               // GSS
+               Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
+               if (!krb5It.hasNext())
+                       return null;
+               KerberosPrincipal krb5Principal = null;
+               while (krb5It.hasNext()) {
+                       KerberosPrincipal principal = krb5It.next();
+                       if (principal.getName().equals(servicePrincipal))
+                               krb5Principal = principal;
+               }
+
+               if (krb5Principal == null)
+                       return null;
+
+               GSSManager manager = GSSManager.getInstance();
+               try {
+                       GSSName gssName = manager.createName(krb5Principal.getName(), null);
+                       GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
+
+                               @Override
+                               public GSSCredential run() throws GSSException {
+                                       return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
+                                                       GSSCredential.ACCEPT_ONLY);
+
+                               }
+
+                       });
+                       if (log.isDebugEnabled())
+                               log.debug("GSS acceptor configured for " + krb5Principal);
+                       return serverCredentials;
+               } catch (Exception gsse) {
+                       throw new IllegalStateException("Cannot create acceptor credentials for " + krb5Principal, gsse);
+               }
+       }
+
+       public GSSCredential getAcceptorCredentials() {
+               return acceptorCredentials;
+       }
+
+       public boolean isSingleUser() {
+               return singleUser;
+       }
+
+       public final static Oid KERBEROS_OID;
+       static {
+               try {
+                       KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
+               } catch (GSSException e) {
+                       throw new IllegalStateException("Cannot create Kerberos OID", e);
+               }
        }
 
 }