org.argeo.cms/src/org/argeo/cms/auth/RemoteSessionLoginModule.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
  17 import org.argeo.api.cms.CmsLog;
  18 import org.argeo.cms.CmsDeployProperty;
  19 import org.argeo.cms.internal.auth.CmsSessionImpl;
  20 import org.argeo.cms.internal.runtime.CmsContextImpl;
  21 import org.argeo.cms.internal.runtime.CmsStateImpl;
  22 import org.argeo.util.http.HttpHeader;
  23 import org.osgi.service.useradmin.Authorization;
  24
  25 /** Use the HTTP session as the basis for authentication. */
  26 public class RemoteSessionLoginModule implements LoginModule {
  27         private final static CmsLog log = CmsLog.getLog(RemoteSessionLoginModule.class);
  28
  29         private Subject subject = null;
  30         private CallbackHandler callbackHandler = null;
  31         private Map<String, Object> sharedState = null;
  32
  33         private RemoteAuthRequest request = null;
  34         private RemoteAuthResponse response = null;
  35
  36         private Authorization authorization;
  37         private Locale locale;
  38
  39         @SuppressWarnings("unchecked")
  40         @Override
  41         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  42                         Map<String, ?> options) {
  43                 this.subject = subject;
  44                 this.callbackHandler = callbackHandler;
  45                 this.sharedState = (Map<String, Object>) sharedState;
  46         }
  47
  48         @Override
  49         public boolean login() throws LoginException {
  50                 if (callbackHandler == null)
  51                         return false;
  52                 RemoteAuthCallback remoteAuthCallback = new RemoteAuthCallback();
  53                 try {
  54                         callbackHandler.handle(new Callback[] { remoteAuthCallback });
  55                 } catch (IOException e) {
  56                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  57                 } catch (UnsupportedCallbackException e) {
  58                         return false;
  59                 }
  60                 request = remoteAuthCallback.getRequest();
  61                 if (request == null) {
  62                         RemoteAuthSession httpSession = remoteAuthCallback.getHttpSession();
  63                         if (httpSession == null)
  64                                 return false;
  65                         // TODO factorize with below
  66                         String httpSessionId = httpSession.getId();
  67 //                      if (log.isTraceEnabled())
  68 //                              log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  69                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  70                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  71                                 authorization = cmsSession.getAuthorization();
  72                                 locale = cmsSession.getLocale();
  73                                 if (log.isTraceEnabled())
  74                                         log.trace("Retrieved authorization from " + cmsSession);
  75                         }
  76                 } else {
  77                         authorization = (Authorization) request.getAttribute(RemoteAuthRequest.AUTHORIZATION);
  78                         if (authorization == null) {// search by session ID
  79                                 RemoteAuthSession httpSession = request.getSession();
  80 //                              if (httpSession == null) {
  81 //                                      // TODO make sure this is always safe
  82 //                                      if (log.isTraceEnabled())
  83 //                                              log.trace("Create http session");
  84 //                                      httpSession = request.createSession();
  85 //                              }
  86                                 if (httpSession != null) {
  87                                         String httpSessionId = httpSession.getId();
  88 //                              if (log.isTraceEnabled())
  89 //                                      log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  90                                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  91                                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  92                                                 authorization = cmsSession.getAuthorization();
  93                                                 locale = cmsSession.getLocale();
  94                                                 if (log.isTraceEnabled())
  95                                                         log.trace("Retrieved authorization from " + cmsSession);
  96                                         }
  97                                 }
  98                         }
  99                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 100                         extractHttpAuth(request);
 101                         extractClientCertificate(request);
 102                 }
 103                 if (authorization == null) {
 104                         if (log.isTraceEnabled())
 105                                 log.trace("HTTP login: " + false);
 106                         return false;
 107                 } else {
 108                         if (log.isTraceEnabled())
 109                                 log.trace("HTTP login: " + true);
 110                         request.setAttribute(RemoteAuthRequest.AUTHORIZATION, authorization);
 111                         return true;
 112                 }
 113         }
 114
 115         @Override
 116         public boolean commit() throws LoginException {
 117                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 118                 if (outToken != null) {
 119                         response.setHeader(HttpHeader.WWW_AUTHENTICATE.getName(),
 120                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 121                 }
 122
 123                 if (authorization != null) {
 124                         // Locale locale = request.getLocale();
 125                         if (locale == null && request != null)
 126                                 locale = request.getLocale();
 127                         if (locale != null)
 128                                 subject.getPublicCredentials().add(locale);
 129                         CmsAuthUtils.addAuthorization(subject, authorization);
 130                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 131                         cleanUp();
 132                         return true;
 133                 } else {
 134                         cleanUp();
 135                         return false;
 136                 }
 137         }
 138
 139         @Override
 140         public boolean abort() throws LoginException {
 141                 cleanUp();
 142                 return false;
 143         }
 144
 145         private void cleanUp() {
 146                 authorization = null;
 147                 request = null;
 148         }
 149
 150         @Override
 151         public boolean logout() throws LoginException {
 152                 cleanUp();
 153                 return true;
 154         }
 155
 156         private void extractHttpAuth(final RemoteAuthRequest httpRequest) {
 157                 String authHeader = httpRequest.getHeader(HttpHeader.AUTHORIZATION.getName());
 158                 extractHttpAuth(authHeader);
 159         }
 160
 161         private void extractHttpAuth(String authHeader) {
 162                 if (authHeader != null) {
 163                         StringTokenizer st = new StringTokenizer(authHeader);
 164                         if (st.hasMoreTokens()) {
 165                                 String basic = st.nextToken();
 166                                 if (basic.equalsIgnoreCase(HttpHeader.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 IllegalStateException("Invalid authentication token");
 180                                                 }
 181                                         } catch (Exception e) {
 182                                                 throw new IllegalStateException("Couldn't retrieve authentication", e);
 183                                         }
 184                                 } else if (basic.equalsIgnoreCase(HttpHeader.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(RemoteAuthRequest 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 = CmsStateImpl.getDeployProperty(CmsContextImpl.getCmsContext().getCmsState(),
 213                                 CmsDeployProperty.HTTP_PROXY_SSL_HEADER_DN);
 214                 if (clientDnHttpHeader != null) {
 215                         String certDn = req.getHeader(clientDnHttpHeader);
 216                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 217                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 218                         if (certDn != null && !certDn.trim().equals("(null)")) {
 219                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 220                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 221                                 if (log.isDebugEnabled())
 222                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 223                         }
 224                 }
 225         }
 226
 227 }