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.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 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         private Locale locale;
  43
  44         @SuppressWarnings("unchecked")
  45         @Override
  46         public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
  47                         Map<String, ?> options) {
  48                 bc = FrameworkUtil.getBundle(HttpSessionLoginModule.class).getBundleContext();
  49                 assert bc != null;
  50                 this.subject = subject;
  51                 this.callbackHandler = callbackHandler;
  52                 this.sharedState = (Map<String, Object>) sharedState;
  53         }
  54
  55         @Override
  56         public boolean login() throws LoginException {
  57                 if (callbackHandler == null)
  58                         return false;
  59                 HttpRequestCallback httpCallback = new HttpRequestCallback();
  60                 try {
  61                         callbackHandler.handle(new Callback[] { httpCallback });
  62                 } catch (IOException e) {
  63                         throw new LoginException("Cannot handle http callback: " + e.getMessage());
  64                 } catch (UnsupportedCallbackException e) {
  65                         return false;
  66                 }
  67                 request = httpCallback.getRequest();
  68                 if (request == null) {
  69                         HttpSession httpSession = httpCallback.getHttpSession();
  70                         if (httpSession == null)
  71                                 return false;
  72                         // TODO factorize with below
  73                         String httpSessionId = httpSession.getId();
  74                         if (log.isTraceEnabled())
  75                                 log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  76                         CmsSession cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  77                         if (cmsSession != null) {
  78                                 authorization = cmsSession.getAuthorization();
  79                                 locale = cmsSession.getLocale();
  80                                 if (log.isTraceEnabled())
  81                                         log.trace("Retrieved authorization from " + cmsSession);
  82                         }
  83                 } else {
  84                         authorization = (Authorization) request.getAttribute(HttpContext.AUTHORIZATION);
  85                         if (authorization == null) {// search by session ID
  86                                 HttpSession httpSession = request.getSession(false);
  87                                 if (httpSession == null) {
  88                                         // TODO make sure this is always safe
  89                                         if (log.isTraceEnabled())
  90                                                 log.trace("Create http session");
  91                                         httpSession = request.getSession(true);
  92                                 }
  93                                 String httpSessionId = httpSession.getId();
  94                                 if (log.isTraceEnabled())
  95                                         log.trace("HTTP login: " + request.getPathInfo() + " #" + httpSessionId);
  96                                 CmsSession cmsSession = CmsAuthUtils.cmsSessionFromHttpSession(bc, httpSessionId);
  97                                 if (cmsSession != null) {
  98                                         authorization = cmsSession.getAuthorization();
  99                                         locale = cmsSession.getLocale();
 100                                         if (log.isTraceEnabled())
 101                                                 log.trace("Retrieved authorization from " + cmsSession);
 102                                 }
 103                         }
 104                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
 105                         extractHttpAuth(request);
 106                         extractClientCertificate(request);
 107                 }
 108                 if (authorization == null) {
 109                         if (log.isTraceEnabled())
 110                                 log.trace("HTTP login: " + false);
 111                         return false;
 112                 } else {
 113                         if (log.isTraceEnabled())
 114                                 log.trace("HTTP login: " + true);
 115                         return true;
 116                 }
 117         }
 118
 119         @Override
 120         public boolean commit() throws LoginException {
 121                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 122                 if (outToken != null) {
 123                         response.setHeader(CmsAuthUtils.HEADER_WWW_AUTHENTICATE,
 124                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 125                 }
 126
 127                 if (authorization != null) {
 128                         // Locale locale = request.getLocale();
 129                         if (locale == null && request != null)
 130                                 locale = request.getLocale();
 131                         if (locale != null)
 132                                 subject.getPublicCredentials().add(locale);
 133                         CmsAuthUtils.addAuthorization(subject, authorization);
 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                 extractHttpAuth(authHeader);
 163         }
 164
 165         private void extractHttpAuth(String authHeader) {
 166                 if (authHeader != null) {
 167                         StringTokenizer st = new StringTokenizer(authHeader);
 168                         if (st.hasMoreTokens()) {
 169                                 String basic = st.nextToken();
 170                                 if (basic.equalsIgnoreCase("Basic")) {
 171                                         try {
 172                                                 // TODO manipulate char[]
 173                                                 Base64.Decoder decoder = Base64.getDecoder();
 174                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 175                                                 // log.debug("Credentials: " + credentials);
 176                                                 int p = credentials.indexOf(":");
 177                                                 if (p != -1) {
 178                                                         final String login = credentials.substring(0, p).trim();
 179                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 180                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 181                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 182                                                 } else {
 183                                                         throw new CmsException("Invalid authentication token");
 184                                                 }
 185                                         } catch (Exception e) {
 186                                                 throw new CmsException("Couldn't retrieve authentication", e);
 187                                         }
 188                                 } else if (basic.equalsIgnoreCase("Negotiate")) {
 189                                         String spnegoToken = st.nextToken();
 190                                         Base64.Decoder decoder = Base64.getDecoder();
 191                                         byte[] authToken = decoder.decode(spnegoToken);
 192                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 193                                 }
 194                         }
 195                 }
 196
 197                 // auth token
 198                 // String mail = request.getParameter(LdapAttrs.mail.name());
 199                 // String authPassword = request.getParameter(LdapAttrs.authPassword.name());
 200                 // if (authPassword != null) {
 201                 // sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, authPassword);
 202                 // if (mail != null)
 203                 // sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, mail);
 204                 // }
 205         }
 206
 207         private void extractClientCertificate(HttpServletRequest req) {
 208                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 209                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 210                         String certDn = certs[0].getSubjectX500Principal().getName();
 211                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 212                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 213                         if (log.isDebugEnabled())
 214                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 215                 } // Reverse proxy verified the client certificate
 216                 String clientDnHttpHeader = Activator.getHttpProxySslHeader();
 217                 if (clientDnHttpHeader != null) {
 218                         String certDn = req.getHeader(clientDnHttpHeader);
 219                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 220                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 221                         if (certDn != null && !certDn.trim().equals("(null)")) {
 222                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 223                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 224                                 if (log.isDebugEnabled())
 225                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 226                         }
 227                 }
 228         }
 229
 230 }