RemoteSessionLoginModule.java

   1 package org.argeo.cms.auth;
   2
   3 import java.io.IOException;
   4 import java.security.cert.X509Certificate;
   5 import java.util.Base64;
   6 import java.util.Locale;
   7 import java.util.Map;
   8 import java.util.StringTokenizer;
   9
  10 import javax.security.auth.Subject;
  11 import javax.security.auth.callback.Callback;
  12 import javax.security.auth.callback.CallbackHandler;
  13 import javax.security.auth.callback.UnsupportedCallbackException;
  14 import javax.security.auth.login.LoginException;
  15 import javax.security.auth.spi.LoginModule;
  16
  17 import org.argeo.api.cms.CmsLog;
  18 import org.argeo.cms.CmsDeployProperty;
  19 import org.argeo.cms.internal.auth.CmsSessionImpl;
  20 import org.argeo.cms.internal.runtime.CmsContextImpl;
  21 import org.argeo.cms.internal.runtime.CmsStateImpl;
  22 import org.osgi.service.useradmin.Authorization;
  23
  24 /** Use the HTTP session as the basis for authentication. */
  25 public class RemoteSessionLoginModule implements LoginModule {
  26         private final static CmsLog log = CmsLog.getLog(RemoteSessionLoginModule.class);
  27
  28         private Subject subject = null;
  29         private CallbackHandler callbackHandler = null;
  30         private Map<String, Object> sharedState = null;
  31
  32         private RemoteAuthRequest request = null;
  33         private RemoteAuthResponse response = null;
  34
  35 //      private BundleContext bc;
  36
  37         private Authorization authorization;
  38         private Locale locale;
  39
  40         @SuppressWarnings("unchecked")
  41         @Override
  42         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  43                         Map<String, ?> options) {
  44 //              bc = FrameworkUtil.getBundle(RemoteSessionLoginModule.class).getBundleContext();
  45 //              assert bc != null;
  46                 this.subject = subject;
  47                 this.callbackHandler = callbackHandler;
  48                 this.sharedState = (Map<String, Object>) sharedState;
  49         }
  50
  51         @Override
  52         public boolean login() throws LoginException {
  53                 if (callbackHandler == null)
  54                         return false;
  55                 RemoteAuthCallback remoteAuthCallback = new RemoteAuthCallback();
  56                 try {
  57                         callbackHandler.handle(new Callback[] { remoteAuthCallback });
  58                 } catch (IOException e) {
  59                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  60                 } catch (UnsupportedCallbackException e) {
  61                         return false;
  62                 }
  63                 request = remoteAuthCallback.getRequest();
  64                 if (request == null) {
  65                         RemoteAuthSession httpSession = remoteAuthCallback.getHttpSession();
  66                         if (httpSession == null)
  67                                 return false;
  68                         // TODO factorize with below
  69                         String httpSessionId = httpSession.getId();
  70 //                      if (log.isTraceEnabled())
  71 //                              log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  72                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  73                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  74                                 authorization = cmsSession.getAuthorization();
  75                                 locale = cmsSession.getLocale();
  76                                 if (log.isTraceEnabled())
  77                                         log.trace("Retrieved authorization from " + cmsSession);
  78                         }
  79                 } else {
  80                         authorization = (Authorization) request.getAttribute(RemoteAuthRequest.AUTHORIZATION);
  81                         if (authorization == null) {// search by session ID
  82                                 RemoteAuthSession httpSession = request.getSession();
  83                                 if (httpSession == null) {
  84                                         // TODO make sure this is always safe
  85                                         if (log.isTraceEnabled())
  86                                                 log.trace("Create http session");
  87                                         httpSession = request.createSession();
  88                                 }
  89                                 String httpSessionId = httpSession.getId();
  90 //                              if (log.isTraceEnabled())
  91 //                                      log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  92                                 CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  93                                 if (cmsSession != null && !cmsSession.isAnonymous()) {
  94                                         authorization = cmsSession.getAuthorization();
  95                                         locale = cmsSession.getLocale();
  96                                         if (log.isTraceEnabled())
  97                                                 log.trace("Retrieved authorization from " + cmsSession);
  98                                 }
  99                         }
 100                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 101                         extractHttpAuth(request);
 102                         extractClientCertificate(request);
 103                 }
 104                 if (authorization == null) {
 105                         if (log.isTraceEnabled())
 106                                 log.trace("HTTP login: " + false);
 107                         return false;
 108                 } else {
 109                         if (log.isTraceEnabled())
 110                                 log.trace("HTTP login: " + true);
 111                         request.setAttribute(RemoteAuthRequest.AUTHORIZATION, authorization);
 112                         return true;
 113                 }
 114         }
 115
 116         @Override
 117         public boolean commit() throws LoginException {
 118                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 119                 if (outToken != null) {
 120                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 121                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 122                 }
 123
 124                 if (authorization != null) {
 125                         // Locale locale = request.getLocale();
 126                         if (locale == null && request != null)
 127                                 locale = request.getLocale();
 128                         if (locale != null)
 129                                 subject.getPublicCredentials().add(locale);
 130                         CmsAuthUtils.addAuthorization(subject, authorization);
 131                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 132                         cleanUp();
 133                         return true;
 134                 } else {
 135                         cleanUp();
 136                         return false;
 137                 }
 138         }
 139
 140         @Override
 141         public boolean abort() throws LoginException {
 142                 cleanUp();
 143                 return false;
 144         }
 145
 146         private void cleanUp() {
 147                 authorization = null;
 148                 request = null;
 149         }
 150
 151         @Override
 152         public boolean logout() throws LoginException {
 153                 cleanUp();
 154                 return true;
 155         }
 156
 157         private void extractHttpAuth(final RemoteAuthRequest httpRequest) {
 158                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 159                 extractHttpAuth(authHeader);
 160         }
 161
 162         private void extractHttpAuth(String authHeader) {
 163                 if (authHeader != null) {
 164                         StringTokenizer st = new StringTokenizer(authHeader);
 165                         if (st.hasMoreTokens()) {
 166                                 String basic = st.nextToken();
 167                                 if (basic.equalsIgnoreCase("Basic")) {
 168                                         try {
 169                                                 // TODO manipulate char[]
 170                                                 Base64.Decoder decoder = Base64.getDecoder();
 171                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 172                                                 // log.debug("Credentials: " + credentials);
 173                                                 int p = credentials.indexOf(":");
 174                                                 if (p != -1) {
 175                                                         final String login = credentials.substring(0, p).trim();
 176                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 177                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 178                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 179                                                 } else {
 180                                                         throw new IllegalStateException("Invalid authentication token");
 181                                                 }
 182                                         } catch (Exception e) {
 183                                                 throw new IllegalStateException("Couldn't retrieve authentication", e);
 184                                         }
 185                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 186                                         String spnegoToken = st.nextToken();
 187                                         Base64.Decoder decoder = Base64.getDecoder();
 188                                         byte[] authToken = decoder.decode(spnegoToken);
 189                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 190                                 }
 191                         }
 192                 }
 193
 194                 // auth token
 195                 // String mail = request.getParameter(LdapAttrs.mail.name());
 196                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 197                 // if (authPassword != null) {
 198                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 199                 // if (mail != null)
 200                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 201                 // }
 202         }
 203
 204         private void extractClientCertificate(RemoteAuthRequest req) {
 205                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 206                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 207                         String certDn = certs[0].getSubjectX500Principal().getName();
 208                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 209                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 210                         if (log.isDebugEnabled())
 211                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 212                 } // Reverse proxy verified the client certificate
 213                 String clientDnHttpHeader = CmsStateImpl.getDeployProperty(CmsContextImpl.getCmsContext().getCmsState(),
 214                                 CmsDeployProperty.HTTP_PROXY_SSL_HEADER_DN);
 215                 if (clientDnHttpHeader != null) {
 216                         String certDn = req.getHeader(clientDnHttpHeader);
 217                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 218                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 219                         if (certDn != null && !certDn.trim().equals("(null)")) {
 220                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 221                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 222                                 if (log.isDebugEnabled())
 223                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 224                         }
 225                 }
 226         }
 227
 228 }