org.argeo.cms/src/org/argeo/cms/internal/runtime/CmsUserAdmin.java

   1 package org.argeo.cms.internal.runtime;
   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.Iterator;
  14 import java.util.Optional;
  15 import java.util.Set;
  16
  17 import javax.security.auth.Subject;
  18 import javax.security.auth.callback.Callback;
  19 import javax.security.auth.callback.CallbackHandler;
  20 import javax.security.auth.callback.NameCallback;
  21 import javax.security.auth.callback.UnsupportedCallbackException;
  22 import javax.security.auth.kerberos.KerberosPrincipal;
  23 import javax.security.auth.login.LoginContext;
  24 import javax.security.auth.login.LoginException;
  25
  26 import org.apache.commons.httpclient.auth.AuthPolicy;
  27 import org.apache.commons.httpclient.auth.CredentialsProvider;
  28 import org.apache.commons.httpclient.params.DefaultHttpParams;
  29 import org.apache.commons.httpclient.params.HttpMethodParams;
  30 import org.apache.commons.httpclient.params.HttpParams;
  31 import org.argeo.api.cms.CmsAuth;
  32 import org.argeo.api.cms.CmsConstants;
  33 import org.argeo.api.cms.CmsLog;
  34 import org.argeo.cms.internal.http.client.HttpCredentialProvider;
  35 import org.argeo.cms.internal.http.client.SpnegoAuthScheme;
  36 import org.argeo.osgi.useradmin.DirectoryUserAdmin;
  37 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
  38 import org.argeo.osgi.useradmin.UserDirectory;
  39 import org.argeo.util.directory.DirectoryConf;
  40 import org.argeo.util.naming.dns.DnsBrowser;
  41 import org.argeo.util.transaction.WorkControl;
  42 import org.argeo.util.transaction.WorkTransaction;
  43 import org.ietf.jgss.GSSCredential;
  44 import org.ietf.jgss.GSSException;
  45 import org.ietf.jgss.GSSManager;
  46 import org.ietf.jgss.GSSName;
  47 import org.ietf.jgss.Oid;
  48 import org.osgi.service.useradmin.Authorization;
  49 import org.osgi.service.useradmin.Group;
  50 import org.osgi.service.useradmin.Role;
  51
  52 /**
  53  * Aggregates multiple {@link UserDirectory} and integrates them with system
  54  * roles.
  55  */
  56 public class CmsUserAdmin extends AggregatingUserAdmin {
  57         private final static CmsLog log = CmsLog.getLog(CmsUserAdmin.class);
  58
  59         // GSS API
  60         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  61         private GSSCredential acceptorCredentials;
  62
  63         private boolean singleUser = false;
  64
  65         private WorkControl transactionManager;
  66         private WorkTransaction userTransaction;
  67
  68         public CmsUserAdmin() {
  69                 super(CmsConstants.ROLES_BASEDN, CmsConstants.TOKENS_BASEDN);
  70         }
  71
  72         public void start() {
  73         }
  74
  75         public void stop() {
  76         }
  77
  78         public UserDirectory enableUserDirectory(Dictionary<String, ?> properties) {
  79                 String uri = (String) properties.get(DirectoryConf.uri.name());
  80                 Object realm = properties.get(DirectoryConf.realm.name());
  81                 URI u;
  82                 try {
  83                         if (uri == null) {
  84                                 String baseDn = (String) properties.get(DirectoryConf.baseDn.name());
  85                                 u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
  86                         } else if (realm != null) {
  87                                 u = null;
  88                         } else {
  89                                 u = new URI(uri);
  90                         }
  91                 } catch (URISyntaxException e) {
  92                         throw new IllegalArgumentException("Badly formatted URI " + uri, e);
  93                 }
  94
  95                 // Create
  96                 UserDirectory userDirectory = new DirectoryUserAdmin(u, properties);
  97 //              if (realm != null || DirectoryConf.SCHEME_LDAP.equals(u.getScheme())
  98 //                              || DirectoryConf.SCHEME_LDAPS.equals(u.getScheme())) {
  99 //                      userDirectory = new LdapUserAdmin(properties);
 100 //              } else if (DirectoryConf.SCHEME_FILE.equals(u.getScheme())) {
 101 //                      userDirectory = new LdifUserAdmin(u, properties);
 102 //              } else if (DirectoryConf.SCHEME_OS.equals(u.getScheme())) {
 103 //                      userDirectory = new OsUserDirectory(u, properties);
 104 //                      singleUser = true;
 105 //              } else {
 106 //                      throw new IllegalArgumentException("Unsupported scheme " + u.getScheme());
 107 //              }
 108                 String basePath = userDirectory.getContext();
 109
 110                 addUserDirectory(userDirectory);
 111                 if (isSystemRolesBaseDn(basePath)) {
 112                         addStandardSystemRoles();
 113                 }
 114                 if (log.isDebugEnabled()) {
 115                         log.debug("User directory " + userDirectory.getContext() + (u != null ? " [" + u.getScheme() + "]" : "")
 116                                         + " enabled." + (realm != null ? " " + realm + " realm." : ""));
 117                 }
 118                 return userDirectory;
 119         }
 120
 121         protected void addStandardSystemRoles() {
 122                 // we assume UserTransaction is already available (TODO make it more robust)
 123                 try {
 124                         userTransaction.begin();
 125                         Role adminRole = getRole(CmsConstants.ROLE_ADMIN);
 126                         if (adminRole == null) {
 127                                 adminRole = createRole(CmsConstants.ROLE_ADMIN, Role.GROUP);
 128                         }
 129                         if (getRole(CmsConstants.ROLE_USER_ADMIN) == null) {
 130                                 Group userAdminRole = (Group) createRole(CmsConstants.ROLE_USER_ADMIN, Role.GROUP);
 131                                 userAdminRole.addMember(adminRole);
 132                         }
 133                         userTransaction.commit();
 134                 } catch (Exception e) {
 135                         try {
 136                                 userTransaction.rollback();
 137                         } catch (Exception e1) {
 138                                 // silent
 139                         }
 140                         throw new IllegalStateException("Cannot add standard system roles", e);
 141                 }
 142         }
 143
 144         @Override
 145         protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
 146                 if (rawAuthorization.getName() == null) {
 147                         sysRoles.add(CmsConstants.ROLE_ANONYMOUS);
 148                 } else {
 149                         sysRoles.add(CmsConstants.ROLE_USER);
 150                 }
 151         }
 152
 153         @Override
 154         protected void postAdd(UserDirectory userDirectory) {
 155                 userDirectory.setTransactionControl(transactionManager);
 156
 157                 Optional<String> realm = userDirectory.getRealm();
 158                 if (realm.isPresent()) {
 159                         if (Files.exists(nodeKeyTab)) {
 160                                 String servicePrincipal = getKerberosServicePrincipal(realm.get());
 161                                 if (servicePrincipal != null) {
 162                                         CallbackHandler callbackHandler = new CallbackHandler() {
 163                                                 @Override
 164                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 165                                                         for (Callback callback : callbacks)
 166                                                                 if (callback instanceof NameCallback)
 167                                                                         ((NameCallback) callback).setName(servicePrincipal);
 168
 169                                                 }
 170                                         };
 171                                         try {
 172                                                 LoginContext nodeLc = new LoginContext(CmsAuth.LOGIN_CONTEXT_NODE, callbackHandler);
 173                                                 nodeLc.login();
 174                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 175                                         } catch (LoginException e) {
 176                                                 throw new IllegalStateException("Cannot log in kernel", e);
 177                                         }
 178                                 }
 179                         }
 180
 181                         // Register client-side SPNEGO auth scheme
 182                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 183                         HttpParams params = DefaultHttpParams.getDefaultParams();
 184                         ArrayList<String> schemes = new ArrayList<>();
 185                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 186                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 187                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 188                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 189                         params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
 190                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 191                 }
 192         }
 193
 194         @Override
 195         protected void preDestroy(UserDirectory userDirectory) {
 196                 Optional<String> realm = userDirectory.getRealm();
 197                 if (realm.isPresent()) {
 198                         if (acceptorCredentials != null) {
 199                                 try {
 200                                         acceptorCredentials.dispose();
 201                                 } catch (GSSException e) {
 202                                         // silent
 203                                 }
 204                                 acceptorCredentials = null;
 205                         }
 206                 }
 207         }
 208
 209         private String getKerberosServicePrincipal(String realm) {
 210                 String hostname;
 211                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 212                         InetAddress localhost = InetAddress.getLocalHost();
 213                         hostname = localhost.getHostName();
 214                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 215                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 216                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 217                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 218                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 219                                 return KernelConstants.DEFAULT_KERBEROS_SERVICE + "/" + hostname + "@" + kerberosDomain;
 220                         } else
 221                                 return null;
 222                 } catch (Exception e) {
 223                         log.warn("Exception when determining kerberos principal", e);
 224                         return null;
 225                 }
 226         }
 227
 228         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 229                 // not static because class is not supported by Android
 230                 final Oid KERBEROS_OID;
 231                 try {
 232                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 233                 } catch (GSSException e) {
 234                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 235                 }
 236                 // GSS
 237                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 238                 if (!krb5It.hasNext())
 239                         return null;
 240                 KerberosPrincipal krb5Principal = null;
 241                 while (krb5It.hasNext()) {
 242                         KerberosPrincipal principal = krb5It.next();
 243                         if (principal.getName().equals(servicePrincipal))
 244                                 krb5Principal = principal;
 245                 }
 246
 247                 if (krb5Principal == null)
 248                         return null;
 249
 250                 GSSManager manager = GSSManager.getInstance();
 251                 try {
 252                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 253                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 254
 255                                 @Override
 256                                 public GSSCredential run() throws GSSException {
 257                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 258                                                         GSSCredential.ACCEPT_ONLY);
 259
 260                                 }
 261
 262                         });
 263                         if (log.isDebugEnabled())
 264                                 log.debug("GSS acceptor configured for " + krb5Principal);
 265                         return serverCredentials;
 266                 } catch (Exception gsse) {
 267                         throw new IllegalStateException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 268                 }
 269         }
 270
 271         public GSSCredential getAcceptorCredentials() {
 272                 return acceptorCredentials;
 273         }
 274
 275         public boolean hasAcceptorCredentials() {
 276                 return acceptorCredentials != null;
 277         }
 278
 279         public boolean isSingleUser() {
 280                 return singleUser;
 281         }
 282
 283         public void setTransactionManager(WorkControl transactionManager) {
 284                 this.transactionManager = transactionManager;
 285         }
 286
 287         public void setUserTransaction(WorkTransaction userTransaction) {
 288                 this.userTransaction = userTransaction;
 289         }
 290
 291         /*
 292          * STATIC
 293          */
 294
 295 }