org.argeo.cms/src/org/argeo/cms/auth/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.CmsConstants;
  18 import org.argeo.api.cms.CmsLog;
  19 import org.argeo.cms.internal.auth.CmsSessionImpl;
  20 import org.argeo.cms.internal.runtime.KernelUtils;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.FrameworkUtil;
  23 import org.osgi.service.http.HttpContext;
  24 import org.osgi.service.useradmin.Authorization;
  25
  26 /** Use the HTTP session as the basis for authentication. */
  27 public class RemoteSessionLoginModule implements LoginModule {
  28         private final static CmsLog log = CmsLog.getLog(RemoteSessionLoginModule.class);
  29
  30         private Subject subject = null;
  31         private CallbackHandler callbackHandler = null;
  32         private Map<String, Object> sharedState = null;
  33
  34         private RemoteAuthRequest request = null;
  35         private RemoteAuthResponse response = null;
  36
  37         private BundleContext bc;
  38
  39         private Authorization authorization;
  40         private Locale locale;
  41
  42         @SuppressWarnings("unchecked")
  43         @Override
  44         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  45                         Map<String, ?> options) {
  46                 bc = FrameworkUtil.getBundle(RemoteSessionLoginModule.class).getBundleContext();
  47                 assert bc != null;
  48                 this.subject = subject;
  49                 this.callbackHandler = callbackHandler;
  50                 this.sharedState = (Map<String, Object>) sharedState;
  51         }
  52
  53         @Override
  54         public boolean login() throws LoginException {
  55                 if (callbackHandler == null)
  56                         return false;
  57                 RemoteAuthCallback httpCallback = new RemoteAuthCallback();
  58                 try {
  59                         callbackHandler.handle(new Callback[] { httpCallback });
  60                 } catch (IOException e) {
  61                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  62                 } catch (UnsupportedCallbackException e) {
  63                         return false;
  64                 }
  65                 request = httpCallback.getRequest();
  66                 if (request == null) {
  67                         RemoteAuthSession httpSession = httpCallback.getHttpSession();
  68                         if (httpSession == null)
  69                                 return false;
  70                         // TODO factorize with below
  71                         String httpSessionId = httpSession.getId();
  72 //                      if (log.isTraceEnabled())
  73 //                              log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  74                         CmsSessionImpl cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  75                         if (cmsSession != null) {
  76                                 authorization = cmsSession.getAuthorization();
  77                                 locale = cmsSession.getLocale();
  78                                 if (log.isTraceEnabled())
  79                                         log.trace("Retrieved authorization from " + cmsSession);
  80                         }
  81                 } else {
  82                         authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  83                         if (authorization == null) {// search by session ID
  84                                 RemoteAuthSession httpSession = request.getSession();
  85                                 if (httpSession == null) {
  86                                         // TODO make sure this is always safe
  87                                         if (log.isTraceEnabled())
  88                                                 log.trace("Create http session");
  89                                         httpSession = request.createSession();
  90                                 }
  91                                 String httpSessionId = httpSession.getId();
  92 //                              if (log.isTraceEnabled())
  93 //                                      log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  94                                 CmsSessionImpl cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  95                                 if (cmsSession != null) {
  96                                         authorization = cmsSession.getAuthorization();
  97                                         locale = cmsSession.getLocale();
  98                                         if (log.isTraceEnabled())
  99                                                 log.trace("Retrieved authorization from " + cmsSession);
 100                                 }
 101                         }
 102                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 103                         extractHttpAuth(request);
 104                         extractClientCertificate(request);
 105                 }
 106                 if (authorization == null) {
 107                         if (log.isTraceEnabled())
 108                                 log.trace("HTTP login: " + false);
 109                         return false;
 110                 } else {
 111                         if (log.isTraceEnabled())
 112                                 log.trace("HTTP login: " + true);
 113                         request.setAttribute(HttpContext.AUTHORIZATION, authorization);
 114                         return true;
 115                 }
 116         }
 117
 118         @Override
 119         public boolean commit() throws LoginException {
 120                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 121                 if (outToken != null) {
 122                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 123                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 124                 }
 125
 126                 if (authorization != null) {
 127                         // Locale locale = request.getLocale();
 128                         if (locale == null && request != null)
 129                                 locale = request.getLocale();
 130                         if (locale != null)
 131                                 subject.getPublicCredentials().add(locale);
 132                         CmsAuthUtils.addAuthorization(subject, authorization);
 133                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 134                         cleanUp();
 135                         return true;
 136                 } else {
 137                         cleanUp();
 138                         return false;
 139                 }
 140         }
 141
 142         @Override
 143         public boolean abort() throws LoginException {
 144                 cleanUp();
 145                 return false;
 146         }
 147
 148         private void cleanUp() {
 149                 authorization = null;
 150                 request = null;
 151         }
 152
 153         @Override
 154         public boolean logout() throws LoginException {
 155                 cleanUp();
 156                 return true;
 157         }
 158
 159         private void extractHttpAuth(final RemoteAuthRequest httpRequest) {
 160                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 161                 extractHttpAuth(authHeader);
 162         }
 163
 164         private void extractHttpAuth(String authHeader) {
 165                 if (authHeader != null) {
 166                         StringTokenizer st = new StringTokenizer(authHeader);
 167                         if (st.hasMoreTokens()) {
 168                                 String basic = st.nextToken();
 169                                 if (basic.equalsIgnoreCase("Basic")) {
 170                                         try {
 171                                                 // TODO manipulate char[]
 172                                                 Base64.Decoder decoder = Base64.getDecoder();
 173                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 174                                                 // log.debug("Credentials: " + credentials);
 175                                                 int p = credentials.indexOf(":");
 176                                                 if (p != -1) {
 177                                                         final String login = credentials.substring(0, p).trim();
 178                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 179                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 180                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 181                                                 } else {
 182                                                         throw new IllegalStateException("Invalid authentication token");
 183                                                 }
 184                                         } catch (Exception e) {
 185                                                 throw new IllegalStateException("Couldn't retrieve authentication", e);
 186                                         }
 187                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 188                                         String spnegoToken = st.nextToken();
 189                                         Base64.Decoder decoder = Base64.getDecoder();
 190                                         byte[] authToken = decoder.decode(spnegoToken);
 191                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 192                                 }
 193                         }
 194                 }
 195
 196                 // auth token
 197                 // String mail = request.getParameter(LdapAttrs.mail.name());
 198                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 199                 // if (authPassword != null) {
 200                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 201                 // if (mail != null)
 202                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 203                 // }
 204         }
 205
 206         private void extractClientCertificate(RemoteAuthRequest req) {
 207                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 208                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 209                         String certDn = certs[0].getSubjectX500Principal().getName();
 210                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 211                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 212                         if (log.isDebugEnabled())
 213                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 214                 } // Reverse proxy verified the client certificate
 215                 String clientDnHttpHeader = KernelUtils.getFrameworkProp(CmsConstants.HTTP_PROXY_SSL_DN);
 216                 if (clientDnHttpHeader != null) {
 217                         String certDn = req.getHeader(clientDnHttpHeader);
 218                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 219                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 220                         if (certDn != null && !certDn.trim().equals("(null)")) {
 221                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 222                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 223                                 if (log.isDebugEnabled())
 224                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 225                         }
 226                 }
 227         }
 228
 229 }