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.CmsConstants;
  18 import org.argeo.api.cms.CmsLog;
  19 import org.argeo.cms.internal.auth.CmsSessionImpl;
  20 import org.argeo.cms.internal.runtime.CmsContextImpl;
  21 import org.argeo.cms.internal.runtime.KernelUtils;
  22 import org.osgi.service.http.HttpContext;
  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 BundleContext bc;
  37
  38         private Authorization authorization;
  39         private Locale locale;
  40
  41         @SuppressWarnings("unchecked")
  42         @Override
  43         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  44                         Map<String, ?> options) {
  45 //              bc = FrameworkUtil.getBundle(RemoteSessionLoginModule.class).getBundleContext();
  46 //              assert bc != null;
  47                 this.subject = subject;
  48                 this.callbackHandler = callbackHandler;
  49                 this.sharedState = (Map<String, Object>) sharedState;
  50         }
  51
  52         @Override
  53         public boolean login() throws LoginException {
  54                 if (callbackHandler == null)
  55                         return false;
  56                 RemoteAuthCallback httpCallback = new RemoteAuthCallback();
  57                 try {
  58                         callbackHandler.handle(new Callback[] { httpCallback });
  59                 } catch (IOException e) {
  60                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  61                 } catch (UnsupportedCallbackException e) {
  62                         return false;
  63                 }
  64                 request = httpCallback.getRequest();
  65                 if (request == null) {
  66                         RemoteAuthSession httpSession = httpCallback.getHttpSession();
  67                         if (httpSession == null)
  68                                 return false;
  69                         // TODO factorize with below
  70                         String httpSessionId = httpSession.getId();
  71 //                      if (log.isTraceEnabled())
  72 //                              log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  73                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  74                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  75                                 authorization = cmsSession.getAuthorization();
  76                                 locale = cmsSession.getLocale();
  77                                 if (log.isTraceEnabled())
  78                                         log.trace("Retrieved authorization from " + cmsSession);
  79                         }
  80                 } else {
  81                         authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  82                         if (authorization == null) {// search by session ID
  83                                 RemoteAuthSession httpSession = request.getSession();
  84                                 if (httpSession == null) {
  85                                         // TODO make sure this is always safe
  86                                         if (log.isTraceEnabled())
  87                                                 log.trace("Create http session");
  88                                         httpSession = request.createSession();
  89                                 }
  90                                 String httpSessionId = httpSession.getId();
  91 //                              if (log.isTraceEnabled())
  92 //                                      log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  93                                 CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  94                                 if (cmsSession != null && !cmsSession.isAnonymous()) {
  95                                         authorization = cmsSession.getAuthorization();
  96                                         locale = cmsSession.getLocale();
  97                                         if (log.isTraceEnabled())
  98                                                 log.trace("Retrieved authorization from " + cmsSession);
  99                                 }
 100                         }
 101                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 102                         extractHttpAuth(request);
 103                         extractClientCertificate(request);
 104                 }
 105                 if (authorization == null) {
 106                         if (log.isTraceEnabled())
 107                                 log.trace("HTTP login: " + false);
 108                         return false;
 109                 } else {
 110                         if (log.isTraceEnabled())
 111                                 log.trace("HTTP login: " + true);
 112                         request.setAttribute(HttpContext.AUTHORIZATION, authorization);
 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 && request != null)
 128                                 locale = request.getLocale();
 129                         if (locale != null)
 130                                 subject.getPublicCredentials().add(locale);
 131                         CmsAuthUtils.addAuthorization(subject, authorization);
 132                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 133                         cleanUp();
 134                         return true;
 135                 } else {
 136                         cleanUp();
 137                         return false;
 138                 }
 139         }
 140
 141         @Override
 142         public boolean abort() throws LoginException {
 143                 cleanUp();
 144                 return false;
 145         }
 146
 147         private void cleanUp() {
 148                 authorization = null;
 149                 request = null;
 150         }
 151
 152         @Override
 153         public boolean logout() throws LoginException {
 154                 cleanUp();
 155                 return true;
 156         }
 157
 158         private void extractHttpAuth(final RemoteAuthRequest httpRequest) {
 159                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 160                 extractHttpAuth(authHeader);
 161         }
 162
 163         private void extractHttpAuth(String authHeader) {
 164                 if (authHeader != null) {
 165                         StringTokenizer st = new StringTokenizer(authHeader);
 166                         if (st.hasMoreTokens()) {
 167                                 String basic = st.nextToken();
 168                                 if (basic.equalsIgnoreCase("Basic")) {
 169                                         try {
 170                                                 // TODO manipulate char[]
 171                                                 Base64.Decoder decoder = Base64.getDecoder();
 172                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 173                                                 // log.debug("Credentials: " + credentials);
 174                                                 int p = credentials.indexOf(":");
 175                                                 if (p != -1) {
 176                                                         final String login = credentials.substring(0, p).trim();
 177                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 178                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 179                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 180                                                 } else {
 181                                                         throw new IllegalStateException("Invalid authentication token");
 182                                                 }
 183                                         } catch (Exception e) {
 184                                                 throw new IllegalStateException("Couldn't retrieve authentication", e);
 185                                         }
 186                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 187                                         String spnegoToken = st.nextToken();
 188                                         Base64.Decoder decoder = Base64.getDecoder();
 189                                         byte[] authToken = decoder.decode(spnegoToken);
 190                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 191                                 }
 192                         }
 193                 }
 194
 195                 // auth token
 196                 // String mail = request.getParameter(LdapAttrs.mail.name());
 197                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 198                 // if (authPassword != null) {
 199                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 200                 // if (mail != null)
 201                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 202                 // }
 203         }
 204
 205         private void extractClientCertificate(RemoteAuthRequest req) {
 206                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 207                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 208                         String certDn = certs[0].getSubjectX500Principal().getName();
 209                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 210                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 211                         if (log.isDebugEnabled())
 212                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 213                 } // Reverse proxy verified the client certificate
 214                 String clientDnHttpHeader = KernelUtils.getFrameworkProp(CmsConstants.HTTP_PROXY_SSL_DN);
 215                 if (clientDnHttpHeader != null) {
 216                         String certDn = req.getHeader(clientDnHttpHeader);
 217                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 218                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 219                         if (certDn != null && !certDn.trim().equals("(null)")) {
 220                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 221                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 222                                 if (log.isDebugEnabled())
 223                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 224                         }
 225                 }
 226         }
 227
 228 }