org.argeo.cms/src/org/argeo/cms/auth/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.argeo.naming.LdapAttrs;
  24 import org.osgi.framework.BundleContext;
  25 import org.osgi.framework.FrameworkUtil;
  26 import org.osgi.framework.InvalidSyntaxException;
  27 import org.osgi.framework.ServiceReference;
  28 import org.osgi.service.http.HttpContext;
  29 import org.osgi.service.useradmin.Authorization;
  30
  31 public class HttpSessionLoginModule implements LoginModule {
  32         private final static Log log = LogFactory.getLog(HttpSessionLoginModule.class);
  33
  34         private Subject subject = null;
  35         private CallbackHandler callbackHandler = null;
  36         private Map<String, Object> sharedState = null;
  37
  38         private HttpServletRequest request = null;
  39         private HttpServletResponse response = null;
  40
  41         private BundleContext bc;
  42
  43         private Authorization authorization;
  44
  45         @SuppressWarnings("unchecked")
  46         @Override
  47         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  48                         Map<String, ?> options) {
  49                 bc = FrameworkUtil.getBundle(HttpSessionLoginModule.class).getBundleContext();
  50                 assert bc != null;
  51                 this.subject = subject;
  52                 this.callbackHandler = callbackHandler;
  53                 this.sharedState = (Map<String, Object>) sharedState;
  54         }
  55
  56         @Override
  57         public boolean login() throws LoginException {
  58                 if (callbackHandler == null)
  59                         return false;
  60                 HttpRequestCallback httpCallback = new HttpRequestCallback();
  61                 try {
  62                         callbackHandler.handle(new Callback[] { httpCallback });
  63                 } catch (IOException e) {
  64                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  65                 } catch (UnsupportedCallbackException e) {
  66                         return false;
  67                 }
  68                 request = httpCallback.getRequest();
  69                 if (request == null)
  70                         return false;
  71                 authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  72                 if (authorization == null) {// search by session ID
  73                         HttpSession httpSession = request.getSession(false);
  74                         if (httpSession == null) {
  75                                 // TODO make sure this is always safe
  76                                 if (log.isTraceEnabled())
  77                                         log.trace("Create http session");
  78                                 httpSession = request.getSession(true);
  79                         }
  80                         String httpSessionId = httpSession.getId();
  81                         // authorization = (Authorization)
  82                         // request.getSession().getAttribute(HttpContext.AUTHORIZATION);
  83                         // if (authorization == null) {
  84                         Collection<ServiceReference<CmsSession>> sr;
  85                         try {
  86                                 sr = bc.getServiceReferences(CmsSession.class,
  87                                                 "(" + CmsSession.SESSION_LOCAL_ID + "=" + httpSessionId + ")");
  88                         } catch (InvalidSyntaxException e) {
  89                                 throw new CmsException("Cannot get CMS session for id " + httpSessionId, e);
  90                         }
  91                         if (sr.size() == 1) {
  92                                 CmsSession cmsSession = bc.getService(sr.iterator().next());
  93                                 authorization = cmsSession.getAuthorization();
  94                                 if (authorization.getName() == null)
  95                                         authorization = null;// anonymous is not sufficient
  96                                 if (log.isTraceEnabled())
  97                                         log.trace("Retrieved authorization from " + cmsSession);
  98                         } else if (sr.size() == 0)
  99                                 authorization = null;
 100                         else
 101                                 throw new CmsException(sr.size() + ">1 web sessions detected for http session " + httpSessionId);
 102
 103                 }
 104                 sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 105                 extractHttpAuth(request);
 106                 extractClientCertificate(request);
 107                 if (authorization == null) {
 108                         return false;
 109                 } else {
 110                         return true;
 111                 }
 112         }
 113
 114         @Override
 115         public boolean commit() throws LoginException {
 116                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 117                 if (outToken != null) {
 118                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 119                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 120                 }
 121
 122                 if (authorization != null) {
 123                         CmsAuthUtils.addAuthorization(subject, authorization, request.getLocale(), request);
 124                         cleanUp();
 125                         return true;
 126                 } else {
 127                         cleanUp();
 128                         return false;
 129                 }
 130         }
 131
 132         @Override
 133         public boolean abort() throws LoginException {
 134                 cleanUp();
 135                 return false;
 136         }
 137
 138         private void cleanUp() {
 139                 authorization = null;
 140                 request = null;
 141         }
 142
 143         @Override
 144         public boolean logout() throws LoginException {
 145                 cleanUp();
 146                 return true;
 147         }
 148
 149         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 150                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 151                 if (authHeader != null) {
 152                         StringTokenizer st = new StringTokenizer(authHeader);
 153                         if (st.hasMoreTokens()) {
 154                                 String basic = st.nextToken();
 155                                 if (basic.equalsIgnoreCase("Basic")) {
 156                                         try {
 157                                                 // TODO manipulate char[]
 158                                                 String credentials = new String(Base64.decodeBase64(st.nextToken()), "UTF-8");
 159                                                 // log.debug("Credentials: " + credentials);
 160                                                 int p = credentials.indexOf(":");
 161                                                 if (p != -1) {
 162                                                         final String login = credentials.substring(0, p).trim();
 163                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 164                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 165                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 166                                                 } else {
 167                                                         throw new CmsException("Invalid authentication token");
 168                                                 }
 169                                         } catch (Exception e) {
 170                                                 throw new CmsException("Couldn't retrieve authentication", e);
 171                                         }
 172                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 173                                         String spnegoToken = st.nextToken();
 174                                         byte[] authToken = Base64.decodeBase64(spnegoToken);
 175                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 176                                 }
 177                         }
 178                 }
 179
 180                 // auth token
 181 //              String mail = request.getParameter(LdapAttrs.mail.name());
 182 //              String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 183 //              if (authPassword != null) {
 184 //                      sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 185 //                      if (mail != null)
 186 //                              sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 187 //              }
 188         }
 189
 190         private X509Certificate[] extractClientCertificate(HttpServletRequest req) {
 191                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 192                 if (null != certs && certs.length > 0) {
 193                         return certs;
 194                 }
 195                 return null;
 196         }
 197
 198 }