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.Collection;
   6 import java.util.Map;
   7 import java.util.StringTokenizer;
   8
   9 import javax.security.auth.Subject;
  10 import javax.security.auth.callback.Callback;
  11 import javax.security.auth.callback.CallbackHandler;
  12 import javax.security.auth.callback.UnsupportedCallbackException;
  13 import javax.security.auth.login.LoginException;
  14 import javax.security.auth.spi.LoginModule;
  15 import javax.servlet.http.HttpServletRequest;
  16 import javax.servlet.http.HttpServletResponse;
  17
  18 import org.apache.commons.codec.binary.Base64;
  19 import org.apache.commons.logging.Log;
  20 import org.apache.commons.logging.LogFactory;
  21 import org.argeo.cms.CmsException;
  22 import org.osgi.framework.BundleContext;
  23 import org.osgi.framework.FrameworkUtil;
  24 import org.osgi.framework.InvalidSyntaxException;
  25 import org.osgi.framework.ServiceReference;
  26 import org.osgi.service.http.HttpContext;
  27 import org.osgi.service.useradmin.Authorization;
  28
  29 public class HttpSessionLoginModule implements LoginModule {
  30         private final static Log log = LogFactory.getLog(HttpSessionLoginModule.class);
  31
  32         private Subject subject = null;
  33         private CallbackHandler callbackHandler = null;
  34         private Map<String, Object> sharedState = null;
  35
  36         private HttpServletRequest request = null;
  37         private HttpServletResponse response = null;
  38
  39         private BundleContext bc;
  40
  41         private Authorization authorization;
  42
  43         @SuppressWarnings("unchecked")
  44         @Override
  45         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  46                         Map<String, ?> options) {
  47                 bc = FrameworkUtil.getBundle(HttpSessionLoginModule.class).getBundleContext();
  48                 assert bc != null;
  49                 this.subject = subject;
  50                 this.callbackHandler = callbackHandler;
  51                 this.sharedState = (Map<String, Object>) sharedState;
  52         }
  53
  54         @Override
  55         public boolean login() throws LoginException {
  56                 if (callbackHandler == null)
  57                         return false;
  58                 HttpRequestCallback httpCallback = new HttpRequestCallback();
  59                 try {
  60                         callbackHandler.handle(new Callback[] { httpCallback });
  61                 } catch (IOException e) {
  62                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  63                 } catch (UnsupportedCallbackException e) {
  64                         return false;
  65                 }
  66                 request = httpCallback.getRequest();
  67                 if (request == null)
  68                         return false;
  69                 authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  70                 if (authorization == null) {// search by session ID
  71                         String httpSessionId = request.getSession().getId();
  72                         // authorization = (Authorization)
  73                         // request.getSession().getAttribute(HttpContext.AUTHORIZATION);
  74                         // if (authorization == null) {
  75                         Collection<ServiceReference<CmsSession>> sr;
  76                         try {
  77                                 sr = bc.getServiceReferences(CmsSession.class,
  78                                                 "(" + CmsSession.SESSION_LOCAL_ID + "=" + httpSessionId + ")");
  79                         } catch (InvalidSyntaxException e) {
  80                                 throw new CmsException("Cannot get CMS session for id " + httpSessionId, e);
  81                         }
  82                         if (sr.size() == 1) {
  83                                 CmsSession cmsSession = bc.getService(sr.iterator().next());
  84                                 authorization = cmsSession.getAuthorization();
  85                                 if (log.isTraceEnabled())
  86                                         log.trace("Retrieved authorization from " + cmsSession);
  87                         } else if (sr.size() == 0)
  88                                 authorization = null;
  89                         else
  90                                 throw new CmsException(sr.size() + ">1 web sessions detected for http session " + httpSessionId);
  91
  92                 }
  93                 sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
  94                 extractHttpAuth(request);
  95                 extractClientCertificate(request);
  96                 if (authorization == null)
  97                         return false;
  98                 sharedState.put(CmsAuthUtils.SHARED_STATE_AUTHORIZATION, authorization);
  99                 return true;
 100         }
 101
 102         @Override
 103         public boolean commit() throws LoginException {
 104                 // TODO create CmsSession in another module
 105                 Authorization authorizationToRegister;
 106                 if (authorization == null) {
 107                         authorizationToRegister = (Authorization) sharedState.get(CmsAuthUtils.SHARED_STATE_AUTHORIZATION);
 108                 } else { // this login module did the authorization
 109                         CmsAuthUtils.addAuthentication(subject, authorization);
 110                         authorizationToRegister = authorization;
 111                 }
 112                 if (authorizationToRegister == null) {
 113                         return false;
 114                 }
 115                 if (request == null)
 116                         return false;
 117                 CmsAuthUtils.registerSessionAuthorization(bc, request, subject, authorizationToRegister);
 118
 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                         // CmsAuthUtils.addAuthentication(subject, authorization);
 127                         cleanUp();
 128                         return true;
 129                 } else {
 130                         cleanUp();
 131                         return false;
 132                 }
 133         }
 134
 135         @Override
 136         public boolean abort() throws LoginException {
 137                 cleanUp();
 138                 return false;
 139         }
 140
 141         private void cleanUp() {
 142                 authorization = null;
 143                 request = null;
 144         }
 145
 146         @Override
 147         public boolean logout() throws LoginException {
 148                 return CmsAuthUtils.logoutSession(bc, subject);
 149         }
 150
 151         private void extractHttpAuth(final HttpServletRequest httpRequest) {
 152                 String authHeader = httpRequest.getHeader(CmsAuthUtils.HEADER_AUTHORIZATION);
 153                 if (authHeader != null) {
 154                         StringTokenizer st = new StringTokenizer(authHeader);
 155                         if (st.hasMoreTokens()) {
 156                                 String basic = st.nextToken();
 157                                 if (basic.equalsIgnoreCase("Basic")) {
 158                                         try {
 159                                                 // TODO manipulate char[]
 160                                                 String credentials = new String(Base64.decodeBase64(st.nextToken()), "UTF-8");
 161                                                 // log.debug("Credentials: " + credentials);
 162                                                 int p = credentials.indexOf(":");
 163                                                 if (p != -1) {
 164                                                         final String login = credentials.substring(0, p).trim();
 165                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 166                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 167                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 168                                                 } else {
 169                                                         throw new CmsException("Invalid authentication token");
 170                                                 }
 171                                         } catch (Exception e) {
 172                                                 throw new CmsException("Couldn't retrieve authentication", e);
 173                                         }
 174                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 175                                         String spnegoToken = st.nextToken();
 176                                         byte[] authToken = Base64.decodeBase64(spnegoToken);
 177                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 178                                 }
 179                         }
 180                 }
 181         }
 182
 183         private X509Certificate[] extractClientCertificate(HttpServletRequest req) {
 184                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 185                 if (null != certs && certs.length > 0) {
 186                         return certs;
 187                 }
 188                 return null;
 189         }
 190
 191 }