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.Locale;
   7 import java.util.Map;
   8 import java.util.StringTokenizer;
   9
  10 import javax.security.auth.Subject;
  11 import javax.security.auth.callback.Callback;
  12 import javax.security.auth.callback.CallbackHandler;
  13 import javax.security.auth.callback.UnsupportedCallbackException;
  14 import javax.security.auth.login.LoginException;
  15 import javax.security.auth.spi.LoginModule;
  16 import javax.servlet.http.HttpServletRequest;
  17 import javax.servlet.http.HttpServletResponse;
  18 import javax.servlet.http.HttpSession;
  19
  20 import org.apache.commons.logging.Log;
  21 import org.apache.commons.logging.LogFactory;
  22 import org.argeo.cms.CmsException;
  23 import org.argeo.cms.internal.kernel.Activator;
  24 import org.osgi.framework.BundleContext;
  25 import org.osgi.framework.FrameworkUtil;
  26 import org.osgi.service.http.HttpContext;
  27 import org.osgi.service.useradmin.Authorization;
  28
  29 /** Use the HTTP session as the basis for authentication. */
  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         private Locale locale;
  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                         HttpSession httpSession = httpCallback.getHttpSession();
  71                         if (httpSession == null)
  72                                 return false;
  73                         // TODO factorize with below
  74                         String httpSessionId = httpSession.getId();
  75                         if (log.isTraceEnabled())
  76                                 log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  77                         CmsSession cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  78                         if (cmsSession != null) {
  79                                 authorization = cmsSession.getAuthorization();
  80                                 locale = cmsSession.getLocale();
  81                                 if (log.isTraceEnabled())
  82                                         log.trace("Retrieved authorization from " + cmsSession);
  83                         }
  84                 } else {
  85                         authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  86                         if (authorization == null) {// search by session ID
  87                                 HttpSession httpSession = request.getSession(false);
  88                                 if (httpSession == null) {
  89                                         // TODO make sure this is always safe
  90                                         if (log.isTraceEnabled())
  91                                                 log.trace("Create http session");
  92                                         httpSession = request.getSession(true);
  93                                 }
  94                                 String httpSessionId = httpSession.getId();
  95                                 if (log.isTraceEnabled())
  96                                         log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  97                                 CmsSession cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  98                                 if (cmsSession != null) {
  99                                         authorization = cmsSession.getAuthorization();
 100                                         locale = cmsSession.getLocale();
 101                                         if (log.isTraceEnabled())
 102                                                 log.trace("Retrieved authorization from " + cmsSession);
 103                                 }
 104                         }
 105                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 106                         extractHttpAuth(request);
 107                         extractClientCertificate(request);
 108                 }
 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                         request.setAttribute(HttpContext.AUTHORIZATION, authorization);
 117                         return true;
 118                 }
 119         }
 120
 121         @Override
 122         public boolean commit() throws LoginException {
 123                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 124                 if (outToken != null) {
 125                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 126                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 127                 }
 128
 129                 if (authorization != null) {
 130                         // Locale locale = request.getLocale();
 131                         if (locale == null && request != null)
 132                                 locale = request.getLocale();
 133                         if (locale != null)
 134                                 subject.getPublicCredentials().add(locale);
 135                         CmsAuthUtils.addAuthorization(subject, authorization);
 136                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 137                         cleanUp();
 138                         return true;
 139                 } else {
 140                         cleanUp();
 141                         return false;
 142                 }
 143         }
 144
 145         @Override
 146         public boolean abort() throws LoginException {
 147                 cleanUp();
 148                 return false;
 149         }
 150
 151         private void cleanUp() {
 152                 authorization = null;
 153                 request = null;
 154         }
 155
 156         @Override
 157         public boolean logout() throws LoginException {
 158                 cleanUp();
 159                 return true;
 160         }
 161
 162         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 163                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 164                 extractHttpAuth(authHeader);
 165         }
 166
 167         private void extractHttpAuth(String authHeader) {
 168                 if (authHeader != null) {
 169                         StringTokenizer st = new StringTokenizer(authHeader);
 170                         if (st.hasMoreTokens()) {
 171                                 String basic = st.nextToken();
 172                                 if (basic.equalsIgnoreCase("Basic")) {
 173                                         try {
 174                                                 // TODO manipulate char[]
 175                                                 Base64.Decoder decoder = Base64.getDecoder();
 176                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 177                                                 // log.debug("Credentials: " + credentials);
 178                                                 int p = credentials.indexOf(":");
 179                                                 if (p != -1) {
 180                                                         final String login = credentials.substring(0, p).trim();
 181                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 182                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 183                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 184                                                 } else {
 185                                                         throw new CmsException("Invalid authentication token");
 186                                                 }
 187                                         } catch (Exception e) {
 188                                                 throw new CmsException("Couldn't retrieve authentication", e);
 189                                         }
 190                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 191                                         String spnegoToken = st.nextToken();
 192                                         Base64.Decoder decoder = Base64.getDecoder();
 193                                         byte[] authToken = decoder.decode(spnegoToken);
 194                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 195                                 }
 196                         }
 197                 }
 198
 199                 // auth token
 200                 // String mail = request.getParameter(LdapAttrs.mail.name());
 201                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 202                 // if (authPassword != null) {
 203                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 204                 // if (mail != null)
 205                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 206                 // }
 207         }
 208
 209         private void extractClientCertificate(HttpServletRequest req) {
 210                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 211                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 212                         String certDn = certs[0].getSubjectX500Principal().getName();
 213                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 214                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 215                         if (log.isDebugEnabled())
 216                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 217                 } // Reverse proxy verified the client certificate
 218                 String clientDnHttpHeader = Activator.getHttpProxySslHeader();
 219                 if (clientDnHttpHeader != null) {
 220                         String certDn = req.getHeader(clientDnHttpHeader);
 221                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 222                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 223                         if (certDn != null && !certDn.trim().equals("(null)")) {
 224                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 225                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 226                                 if (log.isDebugEnabled())
 227                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 228                         }
 229                 }
 230         }
 231
 232 }