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                         if (log.isTraceEnabled())
  84                                 log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  85                         Collection<ServiceReference<CmsSession>> sr;
  86                         try {
  87                                 sr = bc.getServiceReferences(CmsSession.class,
  88                                                 "(" + CmsSession.SESSION_LOCAL_ID + "=" + httpSessionId + ")");
  89                         } catch (InvalidSyntaxException e) {
  90                                 throw new CmsException("Cannot get CMS session for id " + httpSessionId, e);
  91                         }
  92                         if (sr.size() == 1) {
  93                                 CmsSession cmsSession = bc.getService(sr.iterator().next());
  94                                 locale = cmsSession.getLocale();
  95                                 authorization = cmsSession.getAuthorization();
  96                                 if (authorization.getName() == null)
  97                                         authorization = null;// anonymous is not sufficient
  98                                 if (log.isTraceEnabled())
  99                                         log.trace("Retrieved authorization from " + cmsSession);
 100                         } else if (sr.size() == 0)
 101                                 authorization = null;
 102                         else
 103                                 throw new CmsException(sr.size() + ">1 web sessions detected for http session " + httpSessionId);
 104
 105                 }
 106                 sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 107                 extractHttpAuth(request);
 108                 extractClientCertificate(request);
 109                 if (authorization == null) {
 110                         if (log.isTraceEnabled())
 111                                 log.trace("HTTP login: " + false);
 112                         return false;
 113                 } else {
 114                         if (log.isTraceEnabled())
 115                                 log.trace("HTTP login: " + true);
 116                         return true;
 117                 }
 118         }
 119
 120         @Override
 121         public boolean commit() throws LoginException {
 122                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 123                 if (outToken != null) {
 124                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 125                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 126                 }
 127
 128                 if (authorization != null) {
 129                         // Locale locale = request.getLocale();
 130                         if (locale == null)
 131                                 locale = request.getLocale();
 132                         subject.getPublicCredentials().add(locale);
 133                         CmsAuthUtils.addAuthorization(subject, authorization, locale, request);
 134                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 135                         cleanUp();
 136                         return true;
 137                 } else {
 138                         cleanUp();
 139                         return false;
 140                 }
 141         }
 142
 143         @Override
 144         public boolean abort() throws LoginException {
 145                 cleanUp();
 146                 return false;
 147         }
 148
 149         private void cleanUp() {
 150                 authorization = null;
 151                 request = null;
 152         }
 153
 154         @Override
 155         public boolean logout() throws LoginException {
 156                 cleanUp();
 157                 return true;
 158         }
 159
 160         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 161                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 162                 if (authHeader != null) {
 163                         StringTokenizer st = new StringTokenizer(authHeader);
 164                         if (st.hasMoreTokens()) {
 165                                 String basic = st.nextToken();
 166                                 if (basic.equalsIgnoreCase("Basic")) {
 167                                         try {
 168                                                 // TODO manipulate char[]
 169                                                 Base64.Decoder decoder = Base64.getDecoder();
 170                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 171                                                 // log.debug("Credentials: " + credentials);
 172                                                 int p = credentials.indexOf(":");
 173                                                 if (p != -1) {
 174                                                         final String login = credentials.substring(0, p).trim();
 175                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 176                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 177                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 178                                                 } else {
 179                                                         throw new CmsException("Invalid authentication token");
 180                                                 }
 181                                         } catch (Exception e) {
 182                                                 throw new CmsException("Couldn't retrieve authentication", e);
 183                                         }
 184                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 185                                         String spnegoToken = st.nextToken();
 186                                         Base64.Decoder decoder = Base64.getDecoder();
 187                                         byte[] authToken = decoder.decode(spnegoToken);
 188                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 189                                 }
 190                         }
 191                 }
 192
 193                 // auth token
 194                 // String mail = request.getParameter(LdapAttrs.mail.name());
 195                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 196                 // if (authPassword != null) {
 197                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 198                 // if (mail != null)
 199                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 200                 // }
 201         }
 202
 203         private void extractClientCertificate(HttpServletRequest req) {
 204                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 205                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 206                         String certDn = certs[0].getSubjectX500Principal().getName();
 207                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 208                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 209                         if (log.isDebugEnabled())
 210                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 211                 } // Reverse proxy verified the client certificate
 212                 String clientDnHttpHeader = Activator.getHttpProxySslHeader();
 213                 if (clientDnHttpHeader != null) {
 214                         String certDn = req.getHeader(clientDnHttpHeader);
 215                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 216                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 217                         if (certDn != null && !certDn.trim().equals("(null)")) {
 218                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 219                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 220                                 if (log.isDebugEnabled())
 221                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 222                         }
 223                 }
 224         }
 225
 226 }