HttpSessionLoginModule.java

   1 package org.argeo.cms.auth;
   2
   3 import java.io.IOException;
   4 import java.security.cert.X509Certificate;
   5 import java.util.Collection;
   6 import java.util.Map;
   7 import java.util.StringTokenizer;
   8
   9 import javax.security.auth.Subject;
  10 import javax.security.auth.callback.Callback;
  11 import javax.security.auth.callback.CallbackHandler;
  12 import javax.security.auth.callback.UnsupportedCallbackException;
  13 import javax.security.auth.login.LoginException;
  14 import javax.security.auth.spi.LoginModule;
  15 import javax.servlet.http.HttpServletRequest;
  16 import javax.servlet.http.HttpServletResponse;
  17 import javax.servlet.http.HttpSession;
  18
  19 import org.apache.commons.codec.binary.Base64;
  20 import org.apache.commons.logging.Log;
  21 import org.apache.commons.logging.LogFactory;
  22 import org.argeo.cms.CmsException;
  23 import org.osgi.framework.BundleContext;
  24 import org.osgi.framework.FrameworkUtil;
  25 import org.osgi.framework.InvalidSyntaxException;
  26 import org.osgi.framework.ServiceReference;
  27 import org.osgi.service.http.HttpContext;
  28 import org.osgi.service.useradmin.Authorization;
  29
  30 public class HttpSessionLoginModule implements LoginModule {
  31         private final static Log log = LogFactory.getLog(HttpSessionLoginModule.class);
  32
  33         private Subject subject = null;
  34         private CallbackHandler callbackHandler = null;
  35         private Map<String, Object> sharedState = null;
  36
  37         private HttpServletRequest request = null;
  38         private HttpServletResponse response = null;
  39
  40         private BundleContext bc;
  41
  42         private Authorization authorization;
  43
  44         @SuppressWarnings("unchecked")
  45         @Override
  46         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  47                         Map<String, ?> options) {
  48                 bc = FrameworkUtil.getBundle(HttpSessionLoginModule.class).getBundleContext();
  49                 assert bc != null;
  50                 this.subject = subject;
  51                 this.callbackHandler = callbackHandler;
  52                 this.sharedState = (Map<String, Object>) sharedState;
  53         }
  54
  55         @Override
  56         public boolean login() throws LoginException {
  57                 if (callbackHandler == null)
  58                         return false;
  59                 HttpRequestCallback httpCallback = new HttpRequestCallback();
  60                 try {
  61                         callbackHandler.handle(new Callback[] { httpCallback });
  62                 } catch (IOException e) {
  63                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  64                 } catch (UnsupportedCallbackException e) {
  65                         return false;
  66                 }
  67                 request = httpCallback.getRequest();
  68                 if (request == null)
  69                         return false;
  70                 authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  71                 if (authorization == null) {// search by session ID
  72                         HttpSession httpSession = request.getSession(false);
  73                         if (httpSession == null) {
  74                                 // TODO make sure this is always safe
  75                                 if (log.isTraceEnabled())
  76                                         log.trace("Create http session");
  77                                 httpSession = request.getSession(true);
  78                         }
  79                         String httpSessionId = httpSession.getId();
  80                         // authorization = (Authorization)
  81                         // request.getSession().getAttribute(HttpContext.AUTHORIZATION);
  82                         // if (authorization == null) {
  83                         Collection<ServiceReference<CmsSession>> sr;
  84                         try {
  85                                 sr = bc.getServiceReferences(CmsSession.class,
  86                                                 "(" + CmsSession.SESSION_LOCAL_ID + "=" + httpSessionId + ")");
  87                         } catch (InvalidSyntaxException e) {
  88                                 throw new CmsException("Cannot get CMS session for id " + httpSessionId, e);
  89                         }
  90                         if (sr.size() == 1) {
  91                                 CmsSession cmsSession = bc.getService(sr.iterator().next());
  92                                 authorization = cmsSession.getAuthorization();
  93                                 if (authorization.getName() == null)
  94                                         authorization = null;// anonymous is not sufficient
  95                                 if (log.isTraceEnabled())
  96                                         log.trace("Retrieved authorization from " + cmsSession);
  97                         } else if (sr.size() == 0)
  98                                 authorization = null;
  99                         else
 100                                 throw new CmsException(sr.size() + ">1 web sessions detected for http session " + httpSessionId);
 101
 102                 }
 103                 sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 104                 extractHttpAuth(request);
 105                 extractClientCertificate(request);
 106                 if (authorization == null) {
 107                         return false;
 108                 } else {
 109                         return true;
 110                 }
 111         }
 112
 113         @Override
 114         public boolean commit() throws LoginException {
 115                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 116                 if (outToken != null) {
 117                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 118                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 119                 }
 120
 121                 if (authorization != null) {
 122                         CmsAuthUtils.addAuthorization(subject, authorization, request.getLocale(), request);
 123                         cleanUp();
 124                         return true;
 125                 } else {
 126                         cleanUp();
 127                         return false;
 128                 }
 129         }
 130
 131         @Override
 132         public boolean abort() throws LoginException {
 133                 cleanUp();
 134                 return false;
 135         }
 136
 137         private void cleanUp() {
 138                 authorization = null;
 139                 request = null;
 140         }
 141
 142         @Override
 143         public boolean logout() throws LoginException {
 144                 cleanUp();
 145                 return true;
 146         }
 147
 148         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 149                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 150                 if (authHeader != null) {
 151                         StringTokenizer st = new StringTokenizer(authHeader);
 152                         if (st.hasMoreTokens()) {
 153                                 String basic = st.nextToken();
 154                                 if (basic.equalsIgnoreCase("Basic")) {
 155                                         try {
 156                                                 // TODO manipulate char[]
 157                                                 String credentials = new String(Base64.decodeBase64(st.nextToken()), "UTF-8");
 158                                                 // log.debug("Credentials: " + credentials);
 159                                                 int p = credentials.indexOf(":");
 160                                                 if (p != -1) {
 161                                                         final String login = credentials.substring(0, p).trim();
 162                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 163                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 164                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 165                                                 } else {
 166                                                         throw new CmsException("Invalid authentication token");
 167                                                 }
 168                                         } catch (Exception e) {
 169                                                 throw new CmsException("Couldn't retrieve authentication", e);
 170                                         }
 171                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 172                                         String spnegoToken = st.nextToken();
 173                                         byte[] authToken = Base64.decodeBase64(spnegoToken);
 174                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 175                                 }
 176                         }
 177                 }
 178
 179                 // auth token
 180                 // String mail = request.getParameter(LdapAttrs.mail.name());
 181                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 182                 // if (authPassword != null) {
 183                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 184                 // if (mail != null)
 185                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 186                 // }
 187         }
 188
 189         private void extractClientCertificate(HttpServletRequest req) {
 190                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 191                 if (null != certs && certs.length > 0) {
 192                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certs[0].getSubjectX500Principal().getName());
 193                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 194                 }
 195         }
 196
 197 }