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.Set;
  15
  16 import javax.naming.ldap.LdapName;
  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.transaction.WorkControl;
  37 import org.argeo.osgi.transaction.WorkTransaction;
  38 import org.argeo.osgi.useradmin.AbstractUserDirectory;
  39 import org.argeo.osgi.useradmin.AggregatingUserAdmin;
  40 import org.argeo.osgi.useradmin.LdapUserAdmin;
  41 import org.argeo.osgi.useradmin.LdifUserAdmin;
  42 import org.argeo.osgi.useradmin.OsUserDirectory;
  43 import org.argeo.osgi.useradmin.UserAdminConf;
  44 import org.argeo.osgi.useradmin.UserDirectory;
  45 import org.argeo.util.naming.DnsBrowser;
  46 import org.ietf.jgss.GSSCredential;
  47 import org.ietf.jgss.GSSException;
  48 import org.ietf.jgss.GSSManager;
  49 import org.ietf.jgss.GSSName;
  50 import org.ietf.jgss.Oid;
  51 import org.osgi.service.useradmin.Authorization;
  52 import org.osgi.service.useradmin.Group;
  53 import org.osgi.service.useradmin.Role;
  54
  55 /**
  56  * Aggregates multiple {@link UserDirectory} and integrates them with system
  57  * roles.
  58  */
  59 public class CmsUserAdmin extends AggregatingUserAdmin {
  60         private final static CmsLog log = CmsLog.getLog(CmsUserAdmin.class);
  61
  62         // GSS API
  63         private Path nodeKeyTab = KernelUtils.getOsgiInstancePath(KernelConstants.NODE_KEY_TAB_PATH);
  64         private GSSCredential acceptorCredentials;
  65
  66         private boolean singleUser = false;
  67
  68         private WorkControl transactionManager;
  69         private WorkTransaction userTransaction;
  70
  71         public CmsUserAdmin() {
  72                 super(CmsConstants.ROLES_BASEDN, CmsConstants.TOKENS_BASEDN);
  73         }
  74
  75         public void start() {
  76         }
  77
  78         public void stop() {
  79         }
  80
  81         public UserDirectory enableUserDirectory(Dictionary<String, ?> properties) {
  82                 String uri = (String) properties.get(UserAdminConf.uri.name());
  83                 Object realm = properties.get(UserAdminConf.realm.name());
  84                 URI u;
  85                 try {
  86                         if (uri == null) {
  87                                 String baseDn = (String) properties.get(UserAdminConf.baseDn.name());
  88                                 u = KernelUtils.getOsgiInstanceUri(KernelConstants.DIR_NODE + '/' + baseDn + ".ldif");
  89                         } else if (realm != null) {
  90                                 u = null;
  91                         } else {
  92                                 u = new URI(uri);
  93                         }
  94                 } catch (URISyntaxException e) {
  95                         throw new IllegalArgumentException("Badly formatted URI " + uri, e);
  96                 }
  97
  98                 // Create
  99                 AbstractUserDirectory userDirectory;
 100                 if (realm != null || UserAdminConf.SCHEME_LDAP.equals(u.getScheme())
 101                                 || UserAdminConf.SCHEME_LDAPS.equals(u.getScheme())) {
 102                         userDirectory = new LdapUserAdmin(properties);
 103                 } else if (UserAdminConf.SCHEME_FILE.equals(u.getScheme())) {
 104                         userDirectory = new LdifUserAdmin(u, properties);
 105                 } else if (UserAdminConf.SCHEME_OS.equals(u.getScheme())) {
 106                         userDirectory = new OsUserDirectory(u, properties);
 107                         singleUser = true;
 108                 } else {
 109                         throw new IllegalArgumentException("Unsupported scheme " + u.getScheme());
 110                 }
 111                 LdapName baseDn = userDirectory.getBaseDn();
 112
 113                 addUserDirectory(userDirectory);
 114                 if (isSystemRolesBaseDn(baseDn)) {
 115                         addStandardSystemRoles();
 116                 }
 117                 if (log.isDebugEnabled()) {
 118                         log.debug("User directory " + userDirectory.getBaseDn() + (u != null ? " [" + u.getScheme() + "]" : "")
 119                                         + " enabled." + (realm != null ? " " + realm + " realm." : ""));
 120                 }
 121                 return userDirectory;
 122         }
 123
 124         protected void addStandardSystemRoles() {
 125                 // we assume UserTransaction is already available (TODO make it more robust)
 126                 try {
 127                         userTransaction.begin();
 128                         Role adminRole = getRole(CmsConstants.ROLE_ADMIN);
 129                         if (adminRole == null) {
 130                                 adminRole = createRole(CmsConstants.ROLE_ADMIN, Role.GROUP);
 131                         }
 132                         if (getRole(CmsConstants.ROLE_USER_ADMIN) == null) {
 133                                 Group userAdminRole = (Group) createRole(CmsConstants.ROLE_USER_ADMIN, Role.GROUP);
 134                                 userAdminRole.addMember(adminRole);
 135                         }
 136                         userTransaction.commit();
 137                 } catch (Exception e) {
 138                         try {
 139                                 userTransaction.rollback();
 140                         } catch (Exception e1) {
 141                                 // silent
 142                         }
 143                         throw new IllegalStateException("Cannot add standard system roles", e);
 144                 }
 145         }
 146
 147         @Override
 148         protected void addAbstractSystemRoles(Authorization rawAuthorization, Set<String> sysRoles) {
 149                 if (rawAuthorization.getName() == null) {
 150                         sysRoles.add(CmsConstants.ROLE_ANONYMOUS);
 151                 } else {
 152                         sysRoles.add(CmsConstants.ROLE_USER);
 153                 }
 154         }
 155
 156         protected void postAdd(AbstractUserDirectory userDirectory) {
 157                 userDirectory.setTransactionControl(transactionManager);
 158
 159                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 160                 if (realm != null) {
 161                         if (Files.exists(nodeKeyTab)) {
 162                                 String servicePrincipal = getKerberosServicePrincipal(realm.toString());
 163                                 if (servicePrincipal != null) {
 164                                         CallbackHandler callbackHandler = new CallbackHandler() {
 165                                                 @Override
 166                                                 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 167                                                         for (Callback callback : callbacks)
 168                                                                 if (callback instanceof NameCallback)
 169                                                                         ((NameCallback) callback).setName(servicePrincipal);
 170
 171                                                 }
 172                                         };
 173                                         try {
 174                                                 LoginContext nodeLc = new LoginContext(CmsAuth.LOGIN_CONTEXT_NODE, callbackHandler);
 175                                                 nodeLc.login();
 176                                                 acceptorCredentials = logInAsAcceptor(nodeLc.getSubject(), servicePrincipal);
 177                                         } catch (LoginException e) {
 178                                                 throw new IllegalStateException("Cannot log in kernel", e);
 179                                         }
 180                                 }
 181                         }
 182
 183                         // Register client-side SPNEGO auth scheme
 184                         AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
 185                         HttpParams params = DefaultHttpParams.getDefaultParams();
 186                         ArrayList<String> schemes = new ArrayList<>();
 187                         schemes.add(SpnegoAuthScheme.NAME);// SPNEGO preferred
 188                         // schemes.add(AuthPolicy.BASIC);// incompatible with Basic
 189                         params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
 190                         params.setParameter(CredentialsProvider.PROVIDER, new HttpCredentialProvider());
 191                         params.setParameter(HttpMethodParams.COOKIE_POLICY, KernelConstants.COOKIE_POLICY_BROWSER_COMPATIBILITY);
 192                         // params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 193                 }
 194         }
 195
 196         protected void preDestroy(AbstractUserDirectory userDirectory) {
 197                 Object realm = userDirectory.getProperties().get(UserAdminConf.realm.name());
 198                 if (realm != null) {
 199                         if (acceptorCredentials != null) {
 200                                 try {
 201                                         acceptorCredentials.dispose();
 202                                 } catch (GSSException e) {
 203                                         // silent
 204                                 }
 205                                 acceptorCredentials = null;
 206                         }
 207                 }
 208         }
 209
 210         private String getKerberosServicePrincipal(String realm) {
 211                 String hostname;
 212                 try (DnsBrowser dnsBrowser = new DnsBrowser()) {
 213                         InetAddress localhost = InetAddress.getLocalHost();
 214                         hostname = localhost.getHostName();
 215                         String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
 216                         String ipfromDns = dnsBrowser.getRecord(hostname, localhost instanceof Inet6Address ? "AAAA" : "A");
 217                         boolean consistentIp = localhost.getHostAddress().equals(ipfromDns);
 218                         String kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
 219                         if (consistentIp && kerberosDomain != null && kerberosDomain.equals(realm) && Files.exists(nodeKeyTab)) {
 220                                 return KernelConstants.DEFAULT_KERBEROS_SERVICE + "/" + hostname + "@" + kerberosDomain;
 221                         } else
 222                                 return null;
 223                 } catch (Exception e) {
 224                         log.warn("Exception when determining kerberos principal", e);
 225                         return null;
 226                 }
 227         }
 228
 229         private GSSCredential logInAsAcceptor(Subject subject, String servicePrincipal) {
 230                 // not static because class is not supported by Android
 231                 final Oid KERBEROS_OID;
 232                 try {
 233                         KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
 234                 } catch (GSSException e) {
 235                         throw new IllegalStateException("Cannot create Kerberos OID", e);
 236                 }
 237                 // GSS
 238                 Iterator<KerberosPrincipal> krb5It = subject.getPrincipals(KerberosPrincipal.class).iterator();
 239                 if (!krb5It.hasNext())
 240                         return null;
 241                 KerberosPrincipal krb5Principal = null;
 242                 while (krb5It.hasNext()) {
 243                         KerberosPrincipal principal = krb5It.next();
 244                         if (principal.getName().equals(servicePrincipal))
 245                                 krb5Principal = principal;
 246                 }
 247
 248                 if (krb5Principal == null)
 249                         return null;
 250
 251                 GSSManager manager = GSSManager.getInstance();
 252                 try {
 253                         GSSName gssName = manager.createName(krb5Principal.getName(), null);
 254                         GSSCredential serverCredentials = Subject.doAs(subject, new PrivilegedExceptionAction<GSSCredential>() {
 255
 256                                 @Override
 257                                 public GSSCredential run() throws GSSException {
 258                                         return manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME, KERBEROS_OID,
 259                                                         GSSCredential.ACCEPT_ONLY);
 260
 261                                 }
 262
 263                         });
 264                         if (log.isDebugEnabled())
 265                                 log.debug("GSS acceptor configured for " + krb5Principal);
 266                         return serverCredentials;
 267                 } catch (Exception gsse) {
 268                         throw new IllegalStateException("Cannot create acceptor credentials for " + krb5Principal, gsse);
 269                 }
 270         }
 271
 272         public GSSCredential getAcceptorCredentials() {
 273                 return acceptorCredentials;
 274         }
 275
 276         public boolean hasAcceptorCredentials() {
 277                 return acceptorCredentials != null;
 278         }
 279
 280         public boolean isSingleUser() {
 281                 return singleUser;
 282         }
 283
 284         public void setTransactionManager(WorkControl transactionManager) {
 285                 this.transactionManager = transactionManager;
 286         }
 287
 288         public void setUserTransaction(WorkTransaction userTransaction) {
 289                 this.userTransaction = userTransaction;
 290         }
 291
 292         /*
 293          * STATIC
 294          */
 295
 296 }