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.Base64;
   6 import java.util.Collection;
   7 import java.util.Locale;
   8 import java.util.Map;
   9 import java.util.StringTokenizer;
  10
  11 import javax.security.auth.Subject;
  12 import javax.security.auth.callback.Callback;
  13 import javax.security.auth.callback.CallbackHandler;
  14 import javax.security.auth.callback.UnsupportedCallbackException;
  15 import javax.security.auth.login.LoginException;
  16 import javax.security.auth.spi.LoginModule;
  17 import javax.servlet.http.HttpServletRequest;
  18 import javax.servlet.http.HttpServletResponse;
  19 import javax.servlet.http.HttpSession;
  20
  21 import org.apache.commons.logging.Log;
  22 import org.apache.commons.logging.LogFactory;
  23 import org.argeo.cms.CmsException;
  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                         Locale locale = request.getLocale();
 124                         CmsAuthUtils.addAuthorization(subject, authorization,locale , request);
 125                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 126                         cleanUp();
 127                         return true;
 128                 } else {
 129                         cleanUp();
 130                         return false;
 131                 }
 132         }
 133
 134         @Override
 135         public boolean abort() throws LoginException {
 136                 cleanUp();
 137                 return false;
 138         }
 139
 140         private void cleanUp() {
 141                 authorization = null;
 142                 request = null;
 143         }
 144
 145         @Override
 146         public boolean logout() throws LoginException {
 147                 cleanUp();
 148                 return true;
 149         }
 150
 151         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 152                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 153                 if (authHeader != null) {
 154                         StringTokenizer st = new StringTokenizer(authHeader);
 155                         if (st.hasMoreTokens()) {
 156                                 String basic = st.nextToken();
 157                                 if (basic.equalsIgnoreCase("Basic")) {
 158                                         try {
 159                                                 // TODO manipulate char[]
 160                                                 Base64.Decoder decoder = Base64.getDecoder();
 161                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 162                                                 // log.debug("Credentials: " + credentials);
 163                                                 int p = credentials.indexOf(":");
 164                                                 if (p != -1) {
 165                                                         final String login = credentials.substring(0, p).trim();
 166                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 167                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 168                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 169                                                 } else {
 170                                                         throw new CmsException("Invalid authentication token");
 171                                                 }
 172                                         } catch (Exception e) {
 173                                                 throw new CmsException("Couldn't retrieve authentication", e);
 174                                         }
 175                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 176                                         String spnegoToken = st.nextToken();
 177                                         Base64.Decoder decoder = Base64.getDecoder();
 178                                         byte[] authToken = decoder.decode(spnegoToken);
 179                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 180                                 }
 181                         }
 182                 }
 183
 184                 // auth token
 185                 // String mail = request.getParameter(LdapAttrs.mail.name());
 186                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 187                 // if (authPassword != null) {
 188                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 189                 // if (mail != null)
 190                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 191                 // }
 192         }
 193
 194         private void extractClientCertificate(HttpServletRequest req) {
 195                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 196                 if (null != certs && certs.length > 0) {
 197                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certs[0].getSubjectX500Principal().getName());
 198                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 199                 }
 200         }
 201
 202 }