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.http.HttpHeader;
  20 import org.argeo.cms.internal.auth.CmsSessionImpl;
  21 import org.argeo.cms.internal.runtime.CmsContextImpl;
  22 import org.argeo.cms.internal.runtime.CmsStateImpl;
  23 import org.osgi.service.useradmin.Authorization;
  24
  25 /** Use a remote 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                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  68                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  69                                 authorization = cmsSession.getAuthorization();
  70                                 locale = cmsSession.getLocale();
  71                                 if (log.isTraceEnabled())
  72                                         log.trace("Retrieved authorization from " + cmsSession);
  73                         }
  74                 } else {
  75                         authorization = (Authorization) request.getAttribute(RemoteAuthRequest.AUTHORIZATION);
  76                         if (authorization == null) {// search by session ID
  77                                 RemoteAuthSession httpSession = request.getSession();
  78                                 if (httpSession != null) {
  79                                         String httpSessionId = httpSession.getId();
  80                                         CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByLocalId(httpSessionId);
  81                                         if (cmsSession != null && !cmsSession.isAnonymous()) {
  82                                                 authorization = cmsSession.getAuthorization();
  83                                                 locale = cmsSession.getLocale();
  84                                                 if (log.isTraceEnabled())
  85                                                         log.trace("Retrieved authorization from " + cmsSession);
  86                                         }
  87                                 }else {
  88                                         request.createSession();
  89                                 }
  90                         }
  91                         sharedState.put(CmsAuthUtils.SHARED_STATE_HTTP_REQUEST, request);
  92                         extractHttpAuth(request);
  93                         extractClientCertificate(request);
  94                 }
  95                 if (authorization == null) {
  96                         if (log.isTraceEnabled())
  97                                 log.trace("HTTP login: " + false);
  98                         return false;
  99                 } else {
 100                         if (log.isTraceEnabled())
 101                                 log.trace("HTTP login: " + true);
 102                         request.setAttribute(RemoteAuthRequest.AUTHORIZATION, authorization);
 103                         return true;
 104                 }
 105         }
 106
 107         @Override
 108         public boolean commit() throws LoginException {
 109                 byte[] outToken = (byte[]) sharedState.get(CmsAuthUtils.SHARED_STATE_SPNEGO_OUT_TOKEN);
 110                 if (outToken != null) {
 111                         response.setHeader(HttpHeader.WWW_AUTHENTICATE.getHeaderName(),
 112                                         "Negotiate " + java.util.Base64.getEncoder().encodeToString(outToken));
 113                 }
 114
 115                 if (authorization != null) {
 116                         // Locale locale = request.getLocale();
 117                         if (locale == null && request != null)
 118                                 locale = request.getLocale();
 119                         if (locale != null)
 120                                 subject.getPublicCredentials().add(locale);
 121                         CmsAuthUtils.addAuthorization(subject, authorization);
 122                         CmsAuthUtils.registerSessionAuthorization(request, subject, authorization, locale);
 123                         cleanUp();
 124                         return true;
 125                 } else {
 126                         cleanUp();
 127                         return false;
 128                 }
 129         }
 130
 131         @Override
 132         public boolean abort() throws LoginException {
 133                 cleanUp();
 134                 return false;
 135         }
 136
 137         private void cleanUp() {
 138                 authorization = null;
 139                 request = null;
 140         }
 141
 142         @Override
 143         public boolean logout() throws LoginException {
 144                 cleanUp();
 145                 return true;
 146         }
 147
 148         private void extractHttpAuth(final RemoteAuthRequest httpRequest) {
 149                 String authHeader = httpRequest.getHeader(HttpHeader.AUTHORIZATION.getHeaderName());
 150                 extractHttpAuth(authHeader);
 151         }
 152
 153         private void extractHttpAuth(String authHeader) {
 154                 if (authHeader != null) {
 155                         StringTokenizer st = new StringTokenizer(authHeader);
 156                         if (st.hasMoreTokens()) {
 157                                 String basic = st.nextToken();
 158                                 if (basic.equalsIgnoreCase(HttpHeader.BASIC)) {
 159                                         try {
 160                                                 // TODO manipulate char[]
 161                                                 Base64.Decoder decoder = Base64.getDecoder();
 162                                                 String credentials = new String(decoder.decode(st.nextToken()), "UTF-8");
 163                                                 // log.debug("Credentials: " + credentials);
 164                                                 int p = credentials.indexOf(":");
 165                                                 if (p != -1) {
 166                                                         final String login = credentials.substring(0, p).trim();
 167                                                         final char[] password = credentials.substring(p + 1).trim().toCharArray();
 168                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, login);
 169                                                         sharedState.put(CmsAuthUtils.SHARED_STATE_PWD, password);
 170                                                 } else {
 171                                                         throw new IllegalStateException("Invalid authentication token");
 172                                                 }
 173                                         } catch (Exception e) {
 174                                                 throw new IllegalStateException("Couldn't retrieve authentication", e);
 175                                         }
 176                                 } else if (basic.equalsIgnoreCase(HttpHeader.NEGOTIATE)) {
 177                                         String spnegoToken = st.nextToken();
 178                                         Base64.Decoder decoder = Base64.getDecoder();
 179                                         byte[] authToken = decoder.decode(spnegoToken);
 180                                         sharedState.put(CmsAuthUtils.SHARED_STATE_SPNEGO_TOKEN, authToken);
 181                                 }
 182                         }
 183                 }
 184         }
 185
 186         private void extractClientCertificate(RemoteAuthRequest req) {
 187                 X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 188                 if (null != certs && certs.length > 0) {// Servlet container verified the client certificate
 189                         String certDn = certs[0].getSubjectX500Principal().getName();
 190                         sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 191                         sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, certs);
 192                         if (log.isDebugEnabled())
 193                                 log.debug("Client certificate " + certDn + " verified by servlet container");
 194                 } // Reverse proxy verified the client certificate
 195                 String clientDnHttpHeader = CmsStateImpl.getDeployProperty(CmsContextImpl.getCmsContext().getCmsState(),
 196                                 CmsDeployProperty.HTTP_PROXY_SSL_HEADER_DN);
 197                 if (clientDnHttpHeader != null) {
 198                         String certDn = req.getHeader(clientDnHttpHeader);
 199                         // TODO retrieve more cf. https://httpd.apache.org/docs/current/mod/mod_ssl.html
 200                         // String issuerDn = req.getHeader("SSL_CLIENT_I_DN");
 201                         if (certDn != null && !certDn.trim().equals("(null)")) {
 202                                 sharedState.put(CmsAuthUtils.SHARED_STATE_NAME, certDn);
 203                                 sharedState.put(CmsAuthUtils.SHARED_STATE_CERTIFICATE_CHAIN, "");
 204                                 if (log.isDebugEnabled())
 205                                         log.debug("Client certificate " + certDn + " verified by reverse proxy");
 206                         }
 207                 }
 208         }
 209
 210 }