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.argeo.cms.internal.kernel.Activator;
  25 import org.osgi.framework.BundleContext;
  26 import org.osgi.framework.FrameworkUtil;
  27 import org.osgi.framework.InvalidSyntaxException;
  28 import org.osgi.framework.ServiceReference;
  29 import org.osgi.service.http.HttpContext;
  30 import org.osgi.service.useradmin.Authorization;
  31
  32 public class HttpSessionLoginModule implements LoginModule {
  33         private final static Log log = LogFactory.getLog(HttpSessionLoginModule.class);
  34
  35         private Subject subject = null;
  36         private CallbackHandler callbackHandler = null;
  37         private Map<String, Object> sharedState = null;
  38
  39         private HttpServletRequest request = null;
  40         private HttpServletResponse response = null;
  41
  42         private BundleContext bc;
  43
  44         private Authorization authorization;
  45         private Locale locale;
  46
  47         @SuppressWarnings("unchecked")
  48         @Override
  49         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  50                         Map<String, ?> options) {
  51                 bc = FrameworkUtil.getBundle(HttpSessionLoginModule.class).getBundleContext();
  52                 assert bc != null;
  53                 this.subject = subject;
  54                 this.callbackHandler = callbackHandler;
  55                 this.sharedState = (Map<String, Object>) sharedState;
  56         }
  57
  58         @Override
  59         public boolean login() throws LoginException {
  60                 if (callbackHandler == null)
  61                         return false;
  62                 HttpRequestCallback httpCallback = new HttpRequestCallback();
  63                 try {
  64                         callbackHandler.handle(new Callback[] { httpCallback });
  65                 } catch (IOException e) {
  66                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  67                 } catch (UnsupportedCallbackException e) {
  68                         return false;
  69                 }
  70                 request = httpCallback.getRequest();
  71                 if (request == null)
  72                         return false;
  73                 authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  74                 if (authorization == null) {// search by session ID
  75                         HttpSession httpSession = request.getSession(false);
  76                         if (httpSession == null) {
  77                                 // TODO make sure this is always safe
  78                                 if (log.isTraceEnabled())
  79                                         log.trace("Create http session");
  80                                 httpSession = request.getSession(true);
  81                         }
  82                         String httpSessionId = httpSession.getId();
  83                         // authorization = (Authorization)
  84                         // request.getSession().getAttribute(HttpContext.AUTHORIZATION);
  85                         // if (authorization == null) {
  86                         Collection<ServiceReference<CmsSession>> sr;
  87                         try {
  88                                 sr = bc.getServiceReferences(CmsSession.class,
  89                                                 "(" + CmsSession.SESSION_LOCAL_ID + "=" + httpSessionId + ")");
  90                         } catch (InvalidSyntaxException e) {
  91                                 throw new CmsException("Cannot get CMS session for id " + httpSessionId, e);
  92                         }
  93                         if (sr.size() == 1) {
  94                                 CmsSession cmsSession = bc.getService(sr.iterator().next());
  95                                 locale = cmsSession.getLocale();
  96                                 authorization = cmsSession.getAuthorization();
  97                                 if (authorization.getName() == null)
  98                                         authorization = null;// anonymous is not sufficient
  99                                 if (log.isTraceEnabled())
 100                                         log.trace("Retrieved authorization from " + cmsSession);
 101                         } else if (sr.size() == 0)
 102                                 authorization = null;
 103                         else
 104                                 throw new CmsException(sr.size() + ">1 web sessions detected for http session " + httpSessionId);
 105
 106                 }
 107                 sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 108                 extractHttpAuth(request);
 109                 extractClientCertificate(request);
 110                 if (authorization == null) {
 111                         return false;
 112                 } else {
 113                         return true;
 114                 }
 115         }
 116
 117         @Override
 118         public boolean commit() throws LoginException {
 119                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 120                 if (outToken != null) {
 121                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 122                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 123                 }
 124
 125                 if (authorization != null) {
 126                         // Locale locale = request.getLocale();
 127                         if (locale == null)
 128                                 locale = request.getLocale();
 129                         subject.getPublicCredentials().add(locale);
 130                         CmsAuthUtils.addAuthorization(subject, authorization, locale, request);
 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 HttpServletRequest httpRequest) {
 158                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 159                 if (authHeader != null) {
 160                         StringTokenizer st = new StringTokenizer(authHeader);
 161                         if (st.hasMoreTokens()) {
 162                                 String basic = st.nextToken();
 163                                 if (basic.equalsIgnoreCase("Basic")) {
 164                                         try {
 165                                                 // TODO manipulate char[]
 166                                                 Base64.Decoder decoder = Base64.getDecoder();
 167                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 168                                                 // log.debug("Credentials: " + credentials);
 169                                                 int p = credentials.indexOf(":");
 170                                                 if (p != -1) {
 171                                                         final String login = credentials.substring(0, p).trim();
 172                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 173                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 174                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 175                                                 } else {
 176                                                         throw new CmsException("Invalid authentication token");
 177                                                 }
 178                                         } catch (Exception e) {
 179                                                 throw new CmsException("Couldn't retrieve authentication", e);
 180                                         }
 181                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 182                                         String spnegoToken = st.nextToken();
 183                                         Base64.Decoder decoder = Base64.getDecoder();
 184                                         byte[] authToken = decoder.decode(spnegoToken);
 185                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 186                                 }
 187                         }
 188                 }
 189
 190                 // auth token
 191                 // String mail = request.getParameter(LdapAttrs.mail.name());
 192                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 193                 // if (authPassword != null) {
 194                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 195                 // if (mail != null)
 196                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 197                 // }
 198         }
 199
 200         private void extractClientCertificate(HttpServletRequest req) {
 201                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 202                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 203                         String certDn = certs[0].getSubjectX500Principal().getName();
 204                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 205                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 206                         if (log.isDebugEnabled())
 207                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 208                 } // Reverse proxy verified the client certificate
 209                 String clientDnHttpHeader = Activator.getHttpProxySslHeader();
 210                 if (clientDnHttpHeader != null) {
 211                         String certDn = req.getHeader(clientDnHttpHeader);
 212                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 213                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 214                         if (certDn != null && !certDn.trim().equals("(null)")) {
 215                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 216                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 217                                 if (log.isDebugEnabled())
 218                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 219                         }
 220                 }
 221         }
 222
 223 }