shibsp/handler/impl/SAML2Logout.cpp

   1 /*
   2  *  Copyright 2001-2009 Internet2
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /**
  18  * SAML2Logout.cpp
  19  *
  20  * Handles SAML 2.0 single logout protocol messages.
  21  */
  22
  23 #include "internal.h"
  24 #include "exceptions.h"
  25 #include "Application.h"
  26 #include "ServiceProvider.h"
  27 #include "SPRequest.h"
  28 #include "handler/AbstractHandler.h"
  29 #include "handler/LogoutHandler.h"
  30 #include "util/SPConstants.h"
  31
  32 #ifndef SHIBSP_LITE
  33 # include "SessionCacheEx.h"
  34 # include "security/SecurityPolicy.h"
  35 # include "metadata/MetadataProviderCriteria.h"
  36 # include "util/TemplateParameters.h"
  37 # include <fstream>
  38 # include <saml/exceptions.h>
  39 # include <saml/SAMLConfig.h>
  40 # include <saml/saml2/core/Protocols.h>
  41 # include <saml/saml2/metadata/EndpointManager.h>
  42 # include <saml/saml2/metadata/Metadata.h>
  43 # include <saml/saml2/metadata/MetadataCredentialCriteria.h>
  44 # include <xmltooling/util/URLEncoder.h>
  45 using namespace opensaml::saml2;
  46 using namespace opensaml::saml2p;
  47 using namespace opensaml::saml2md;
  48 using namespace opensaml;
  49 #endif
  50
  51 using namespace shibsp;
  52 using namespace xmltooling;
  53 using namespace std;
  54
  55 namespace shibsp {
  56
  57 #if defined (_MSC_VER)
  58     #pragma warning( push )
  59     #pragma warning( disable : 4250 )
  60 #endif
  61
  62     class SHIBSP_DLLLOCAL SAML2Logout : public AbstractHandler, public LogoutHandler
  63     {
  64     public:
  65         SAML2Logout(const DOMElement* e, const char* appId);
  66         virtual ~SAML2Logout() {
  67 #ifndef SHIBSP_LITE
  68             if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
  69                 delete m_decoder;
  70                 XMLString::release(&m_outgoing);
  71                 for_each(m_encoders.begin(), m_encoders.end(), cleanup_pair<const XMLCh*,MessageEncoder>());
  72             }
  73 #endif
  74         }
  75
  76         void receive(DDF& in, ostream& out);
  77         pair<bool,long> run(SPRequest& request, bool isHandler=true) const;
  78
  79 #ifndef SHIBSP_LITE
  80         void generateMetadata(SPSSODescriptor& role, const char* handlerURL) const {
  81             const char* loc = getString("Location").second;
  82             string hurl(handlerURL);
  83             if (*loc != '/')
  84                 hurl += '/';
  85             hurl += loc;
  86             auto_ptr_XMLCh widen(hurl.c_str());
  87             SingleLogoutService* ep = SingleLogoutServiceBuilder::buildSingleLogoutService();
  88             ep->setLocation(widen.get());
  89             ep->setBinding(getXMLString("Binding").second);
  90             role.getSingleLogoutServices().push_back(ep);
  91             role.addSupport(samlconstants::SAML20P_NS);
  92         }
  93
  94         const char* getType() const {
  95             return "SingleLogoutService";
  96         }
  97 #endif
  98
  99     private:
 100         pair<bool,long> doRequest(const Application& application, const HTTPRequest& httpRequest, HTTPResponse& httpResponse) const;
 101
 102 #ifndef SHIBSP_LITE
 103         pair<bool,long> sendResponse(
 104             const XMLCh* requestID,
 105             const XMLCh* code,
 106             const XMLCh* subcode,
 107             const char* msg,
 108             const char* relayState,
 109             const RoleDescriptor* role,
 110             const Application& application,
 111             HTTPResponse& httpResponse,
 112             bool front
 113             ) const;
 114
 115         xmltooling::QName m_role;
 116         MessageDecoder* m_decoder;
 117         XMLCh* m_outgoing;
 118         vector<const XMLCh*> m_bindings;
 119         map<const XMLCh*,MessageEncoder*> m_encoders;
 120 #endif
 121     };
 122
 123 #if defined (_MSC_VER)
 124     #pragma warning( pop )
 125 #endif
 126
 127     Handler* SHIBSP_DLLLOCAL SAML2LogoutFactory(const pair<const DOMElement*,const char*>& p)
 128     {
 129         return new SAML2Logout(p.first, p.second);
 130     }
 131 };
 132
 133 SAML2Logout::SAML2Logout(const DOMElement* e, const char* appId)
 134     : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".Logout.SAML2"))
 135 #ifndef SHIBSP_LITE
 136         ,m_role(samlconstants::SAML20MD_NS, IDPSSODescriptor::LOCAL_NAME), m_decoder(NULL), m_outgoing(NULL)
 137 #endif
 138 {
 139     m_initiator = false;
 140 #ifndef SHIBSP_LITE
 141     m_preserve.push_back("ID");
 142     m_preserve.push_back("entityID");
 143     m_preserve.push_back("RelayState");
 144
 145     if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
 146         SAMLConfig& conf = SAMLConfig::getConfig();
 147
 148         // Handle incoming binding.
 149         m_decoder = conf.MessageDecoderManager.newPlugin(
 150             getString("Binding").second, pair<const DOMElement*,const XMLCh*>(e,shibspconstants::SHIB2SPCONFIG_NS)
 151             );
 152         m_decoder->setArtifactResolver(SPConfig::getConfig().getArtifactResolver());
 153
 154         if (m_decoder->isUserAgentPresent()) {
 155             // Handle front-channel binding setup.
 156             pair<bool,const XMLCh*> outgoing = getXMLString("outgoingBindings", m_configNS.get());
 157             if (outgoing.first) {
 158                 m_outgoing = XMLString::replicate(outgoing.second);
 159                 XMLString::trim(m_outgoing);
 160             }
 161             else {
 162                 // No override, so we'll install a default binding precedence.
 163                 string prec = string(samlconstants::SAML20_BINDING_HTTP_REDIRECT) + ' ' + samlconstants::SAML20_BINDING_HTTP_POST + ' ' +
 164                     samlconstants::SAML20_BINDING_HTTP_POST_SIMPLESIGN + ' ' + samlconstants::SAML20_BINDING_HTTP_ARTIFACT;
 165                 m_outgoing = XMLString::transcode(prec.c_str());
 166             }
 167
 168             int pos;
 169             XMLCh* start = m_outgoing;
 170             while (start && *start) {
 171                 pos = XMLString::indexOf(start,chSpace);
 172                 if (pos != -1)
 173                     *(start + pos)=chNull;
 174                 m_bindings.push_back(start);
 175                 try {
 176                     auto_ptr_char b(start);
 177                     MessageEncoder * encoder = conf.MessageEncoderManager.newPlugin(
 178                         b.get(), pair<const DOMElement*,const XMLCh*>(e,shibspconstants::SHIB2SPCONFIG_NS)
 179                         );
 180                     if (encoder->isUserAgentPresent()) {
 181                         m_encoders[start] = encoder;
 182                         m_log.debug("supporting outgoing binding (%s)", b.get());
 183                     }
 184                     else {
 185                         delete encoder;
 186                         m_log.warn("skipping outgoing binding (%s), not a front-channel mechanism", b.get());
 187                     }
 188                 }
 189                 catch (exception& ex) {
 190                     m_log.error("error building MessageEncoder: %s", ex.what());
 191                 }
 192                 if (pos != -1)
 193                     start = start + pos + 1;
 194                 else
 195                     break;
 196             }
 197         }
 198         else {
 199             MessageEncoder* encoder = conf.MessageEncoderManager.newPlugin(
 200                 getString("Binding").second, pair<const DOMElement*,const XMLCh*>(e,shibspconstants::SHIB2SPCONFIG_NS)
 201                 );
 202             m_encoders.insert(pair<const XMLCh*,MessageEncoder*>(NULL, encoder));
 203         }
 204     }
 205 #endif
 206
 207     string address(appId);
 208     address += getString("Location").second;
 209     setAddress(address.c_str());
 210 }
 211
 212 pair<bool,long> SAML2Logout::run(SPRequest& request, bool isHandler) const
 213 {
 214     // Defer to base class for front-channel loop first.
 215     // This won't initiate the loop, only continue/end it.
 216     pair<bool,long> ret = LogoutHandler::run(request, isHandler);
 217     if (ret.first)
 218         return ret;
 219
 220     SPConfig& conf = SPConfig::getConfig();
 221     if (conf.isEnabled(SPConfig::OutOfProcess)) {
 222         // When out of process, we run natively and directly process the message.
 223         return doRequest(request.getApplication(), request, request);
 224     }
 225     else {
 226         // When not out of process, we remote all the message processing.
 227         vector<string> headers(1,"Cookie");
 228         DDF out,in = wrap(request, &headers, true);
 229         DDFJanitor jin(in), jout(out);
 230         out=request.getServiceProvider().getListenerService()->send(in);
 231         return unwrap(request, out);
 232     }
 233 }
 234
 235 void SAML2Logout::receive(DDF& in, ostream& out)
 236 {
 237     // Find application.
 238     const char* aid=in["application_id"].string();
 239     const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : NULL;
 240     if (!app) {
 241         // Something's horribly wrong.
 242         m_log.error("couldn't find application (%s) for logout", aid ? aid : "(missing)");
 243         throw ConfigurationException("Unable to locate application for logout, deleted?");
 244     }
 245
 246     // Unpack the request.
 247     auto_ptr<HTTPRequest> req(getRequest(in));
 248
 249     // Wrap a response shim.
 250     DDF ret(NULL);
 251     DDFJanitor jout(ret);
 252     auto_ptr<HTTPResponse> resp(getResponse(ret));
 253
 254     // Since we're remoted, the result should either be a throw, which we pass on,
 255     // a false/0 return, which we just return as an empty structure, or a response/redirect,
 256     // which we capture in the facade and send back.
 257     doRequest(*app, *req.get(), *resp.get());
 258     out << ret;
 259 }
 260
 261 pair<bool,long> SAML2Logout::doRequest(const Application& application, const HTTPRequest& request, HTTPResponse& response) const
 262 {
 263 #ifndef SHIBSP_LITE
 264     // First capture the active session ID.
 265     SessionCache* cache = application.getServiceProvider().getSessionCache();
 266     SessionCacheEx* cacheex = dynamic_cast<SessionCacheEx*>(cache);
 267     string session_id = cache->active(application, request);
 268
 269     if (!strcmp(request.getMethod(),"GET") && request.getParameter("notifying")) {
 270         // This is returning from a front-channel notification, so we have to do the back-channel and then
 271         // respond. To do that, we need state from the original request.
 272         if (!request.getParameter("entityID")) {
 273             cache->remove(application, request, &response);
 274             throw FatalProfileException("Application notification loop did not return entityID for LogoutResponse.");
 275         }
 276
 277         // Best effort on back channel and to remove the user agent's session.
 278         bool worked1 = false,worked2 = false;
 279         if (!session_id.empty()) {
 280             vector<string> sessions(1,session_id);
 281             worked1 = notifyBackChannel(application, request.getRequestURL(), sessions, false);
 282             try {
 283                 cache->remove(application, request, &response);
 284                 worked2 = true;
 285             }
 286             catch (exception& ex) {
 287                 m_log.error("error removing session (%s): %s", session_id.c_str(), ex.what());
 288             }
 289         }
 290         else {
 291             worked1 = worked2 = true;
 292         }
 293
 294         // We need metadata to issue a response.
 295         MetadataProvider* m = application.getMetadataProvider();
 296         Locker metadataLocker(m);
 297         MetadataProviderCriteria mc(application, request.getParameter("entityID"), &IDPSSODescriptor::ELEMENT_QNAME, samlconstants::SAML20P_NS);
 298         pair<const EntityDescriptor*,const RoleDescriptor*> entity = m->getEntityDescriptor(mc);
 299         if (!entity.first) {
 300             throw MetadataException(
 301                 "Unable to locate metadata for identity provider ($entityID)", namedparams(1, "entityID", request.getParameter("entityID"))
 302                 );
 303         }
 304         else if (!entity.second) {
 305             throw MetadataException(
 306                 "Unable to locate SAML 2.0 IdP role for identity provider ($entityID).",
 307                 namedparams(1, "entityID", request.getParameter("entityID"))
 308                 );
 309         }
 310
 311         auto_ptr_XMLCh reqid(request.getParameter("ID"));
 312         if (worked1 && worked2) {
 313             // Successful LogoutResponse. Has to be front-channel or we couldn't be here.
 314             return sendResponse(
 315                 reqid.get(), StatusCode::SUCCESS, NULL, NULL, request.getParameter("RelayState"), entity.second, application, response, true
 316                 );
 317         }
 318
 319         return sendResponse(
 320             reqid.get(),
 321             StatusCode::RESPONDER, NULL, "Unable to fully destroy principal's session.",
 322             request.getParameter("RelayState"),
 323             entity.second,
 324             application,
 325             response,
 326             true
 327             );
 328     }
 329
 330     // If we get here, it's an external protocol message to decode.
 331
 332     // Locate policy key.
 333     pair<bool,const char*> policyId = getString("policyId", m_configNS.get());  // namespace-qualified if inside handler element
 334     if (!policyId.first)
 335         policyId = application.getString("policyId");   // unqualified in Application(s) element
 336
 337     // Access policy properties.
 338     const PropertySet* settings = application.getServiceProvider().getPolicySettings(policyId.second);
 339     pair<bool,bool> validate = settings->getBool("validate");
 340
 341     // Lock metadata for use by policy.
 342     Locker metadataLocker(application.getMetadataProvider());
 343
 344     // Create the policy.
 345     shibsp::SecurityPolicy policy(application, &m_role, validate.first && validate.second, policyId.second);
 346
 347     // Decode the message.
 348     string relayState;
 349     auto_ptr<XMLObject> msg(m_decoder->decode(relayState, request, policy));
 350     const LogoutRequest* logoutRequest = dynamic_cast<LogoutRequest*>(msg.get());
 351     if (logoutRequest) {
 352         if (!policy.isAuthenticated())
 353             throw SecurityPolicyException("Security of LogoutRequest not established.");
 354
 355         // Message from IdP to logout one or more sessions.
 356
 357         // If this is front-channel, we have to have a session_id to use already.
 358         if (m_decoder->isUserAgentPresent() && session_id.empty()) {
 359             m_log.error("no active session");
 360             return sendResponse(
 361                 logoutRequest->getID(),
 362                 StatusCode::REQUESTER, StatusCode::UNKNOWN_PRINCIPAL, "No active session found in request.",
 363                 relayState.c_str(),
 364                 policy.getIssuerMetadata(),
 365                 application,
 366                 response,
 367                 true
 368                 );
 369         }
 370
 371         bool ownedName = false;
 372         NameID* nameid = logoutRequest->getNameID();
 373         if (!nameid) {
 374             // Check for EncryptedID.
 375             EncryptedID* encname = logoutRequest->getEncryptedID();
 376             if (encname) {
 377                 CredentialResolver* cr=application.getCredentialResolver();
 378                 if (!cr)
 379                     m_log.warn("found encrypted NameID, but no decryption credential was available");
 380                 else {
 381                     Locker credlocker(cr);
 382                     auto_ptr<MetadataCredentialCriteria> mcc(
 383                         policy.getIssuerMetadata() ? new MetadataCredentialCriteria(*policy.getIssuerMetadata()) : NULL
 384                         );
 385                     try {
 386                         auto_ptr<XMLObject> decryptedID(
 387                             encname->decrypt(
 388                                 *cr,
 389                                 application.getRelyingParty(policy.getIssuerMetadata() ? dynamic_cast<EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : NULL)->getXMLString("entityID").second,
 390                                 mcc.get()
 391                                 )
 392                             );
 393                         nameid = dynamic_cast<NameID*>(decryptedID.get());
 394                         if (nameid) {
 395                             ownedName = true;
 396                             decryptedID.release();
 397                         }
 398                     }
 399                     catch (exception& ex) {
 400                         m_log.error(ex.what());
 401                     }
 402                 }
 403             }
 404         }
 405         if (!nameid) {
 406             // No NameID, so must respond with an error.
 407             m_log.error("NameID not found in request");
 408             return sendResponse(
 409                 logoutRequest->getID(),
 410                 StatusCode::REQUESTER, StatusCode::UNKNOWN_PRINCIPAL, "NameID not found in request.",
 411                 relayState.c_str(),
 412                 policy.getIssuerMetadata(),
 413                 application,
 414                 response,
 415                 m_decoder->isUserAgentPresent()
 416                 );
 417         }
 418
 419         auto_ptr<NameID> namewrapper(ownedName ? nameid : NULL);
 420
 421         // Suck indexes out of the request for next steps.
 422         set<string> indexes;
 423         EntityDescriptor* entity = policy.getIssuerMetadata() ? dynamic_cast<EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : NULL;
 424         const vector<SessionIndex*> sindexes = logoutRequest->getSessionIndexs();
 425         for (vector<SessionIndex*>::const_iterator i = sindexes.begin(); i != sindexes.end(); ++i) {
 426             auto_ptr_char sindex((*i)->getSessionIndex());
 427             indexes.insert(sindex.get());
 428         }
 429
 430         // For a front-channel LogoutRequest, we have to match the information in the request
 431         // against the current session.
 432         if (!session_id.empty()) {
 433             if (!cache->matches(application, request, entity, *nameid, &indexes)) {
 434                 return sendResponse(
 435                     logoutRequest->getID(),
 436                     StatusCode::REQUESTER, StatusCode::REQUEST_DENIED, "Active session did not match logout request.",
 437                     relayState.c_str(),
 438                     policy.getIssuerMetadata(),
 439                     application,
 440                     response,
 441                     true
 442                     );
 443             }
 444
 445         }
 446
 447         // Now we perform "logout" by finding the matching sessions.
 448         vector<string> sessions;
 449         try {
 450             if (cacheex) {
 451                 time_t expires = logoutRequest->getNotOnOrAfter() ? logoutRequest->getNotOnOrAfterEpoch() : 0;
 452                 cacheex->logout(application, entity, *nameid, &indexes, expires, sessions);
 453                 m_log.debug("session cache returned %d sessions bound to NameID in logout request", sessions.size());
 454
 455                 // Now we actually terminate everything except for the active session,
 456                 // if this is front-channel, for notification purposes.
 457                 for (vector<string>::const_iterator sit = sessions.begin(); sit != sessions.end(); ++sit)
 458                     if (*sit != session_id)
 459                         cacheex->remove(application, sit->c_str());   // using the ID-based removal operation
 460             }
 461             else {
 462                 m_log.warn("session cache does not support extended API, can't implement indirect logout of sessions");
 463                 if (!session_id.empty())
 464                     sessions.push_back(session_id);
 465             }
 466         }
 467         catch (exception& ex) {
 468             m_log.error("error while logging out matching sessions: %s", ex.what());
 469             return sendResponse(
 470                 logoutRequest->getID(),
 471                 StatusCode::RESPONDER, NULL, ex.what(),
 472                 relayState.c_str(),
 473                 policy.getIssuerMetadata(),
 474                 application,
 475                 response,
 476                 m_decoder->isUserAgentPresent()
 477                 );
 478         }
 479
 480         if (m_decoder->isUserAgentPresent()) {
 481             // Pass control to the first front channel notification point, if any.
 482             map<string,string> parammap;
 483             if (!relayState.empty())
 484                 parammap["RelayState"] = relayState;
 485             auto_ptr_char entityID(entity ? entity->getEntityID() : NULL);
 486             if (entityID.get())
 487                 parammap["entityID"] = entityID.get();
 488             auto_ptr_char reqID(logoutRequest->getID());
 489             if (reqID.get())
 490                 parammap["ID"] = reqID.get();
 491             pair<bool,long> result = notifyFrontChannel(application, request, response, &parammap);
 492             if (result.first)
 493                 return result;
 494         }
 495
 496         // For back-channel requests, or if no front-channel notification is needed...
 497         bool worked1 = notifyBackChannel(application, request.getRequestURL(), sessions, false);
 498         bool worked2 = true;
 499         if (!session_id.empty()) {
 500             // One last session to yoink...
 501             try {
 502                 cache->remove(application, request, &response);
 503             }
 504             catch (exception& ex) {
 505                 worked2 = false;
 506                 m_log.error("error removing active session (%s): %s", session_id.c_str(), ex.what());
 507             }
 508         }
 509
 510         return sendResponse(
 511             logoutRequest->getID(),
 512             (worked1 && worked2) ? StatusCode::SUCCESS : StatusCode::RESPONDER,
 513             (worked1 && worked2) ? NULL : StatusCode::PARTIAL_LOGOUT,
 514             NULL,
 515             relayState.c_str(),
 516             policy.getIssuerMetadata(),
 517             application,
 518             response,
 519             m_decoder->isUserAgentPresent()
 520             );
 521     }
 522
 523     // A LogoutResponse completes an SP-initiated logout sequence.
 524     const LogoutResponse* logoutResponse = dynamic_cast<LogoutResponse*>(msg.get());
 525     if (logoutResponse) {
 526         if (!policy.isAuthenticated()) {
 527             SecurityPolicyException ex("Security of LogoutResponse not established.");
 528             if (policy.getIssuerMetadata())
 529                 annotateException(&ex, policy.getIssuerMetadata()); // throws it
 530             ex.raise();
 531         }
 532         checkError(logoutResponse, policy.getIssuerMetadata()); // throws if Status doesn't look good...
 533
 534         // If relay state is set, recover the original return URL.
 535         if (!relayState.empty())
 536             recoverRelayState(application, request, response, relayState);
 537
 538         // Check for partial logout.
 539         const StatusCode* sc = logoutResponse->getStatus() ? logoutResponse->getStatus()->getStatusCode() : NULL;
 540         sc = sc ? sc->getStatusCode() : NULL;
 541         if (sc && XMLString::equals(sc->getValue(), StatusCode::PARTIAL_LOGOUT))
 542             return sendLogoutPage(application, request, response, "partial");
 543
 544         if (!relayState.empty())
 545             return make_pair(true, response.sendRedirect(relayState.c_str()));
 546
 547         // Return template for completion of logout.
 548         return sendLogoutPage(application, request, response, "global");
 549     }
 550
 551     FatalProfileException ex("Incoming message was not a samlp:LogoutRequest or samlp:LogoutResponse.");
 552     if (policy.getIssuerMetadata())
 553         annotateException(&ex, policy.getIssuerMetadata()); // throws it
 554     ex.raise();
 555     return make_pair(false,0L);  // never happen, satisfies compiler
 556 #else
 557     throw ConfigurationException("Cannot process logout message using lite version of shibsp library.");
 558 #endif
 559 }
 560
 561 #ifndef SHIBSP_LITE
 562
 563 pair<bool,long> SAML2Logout::sendResponse(
 564     const XMLCh* requestID,
 565     const XMLCh* code,
 566     const XMLCh* subcode,
 567     const char* msg,
 568     const char* relayState,
 569     const RoleDescriptor* role,
 570     const Application& application,
 571     HTTPResponse& httpResponse,
 572     bool front
 573     ) const
 574 {
 575     // Get endpoint and encoder to use.
 576     const EndpointType* ep = NULL;
 577     const MessageEncoder* encoder = NULL;
 578     if (front) {
 579         const IDPSSODescriptor* idp = dynamic_cast<const IDPSSODescriptor*>(role);
 580         for (vector<const XMLCh*>::const_iterator b = m_bindings.begin(); idp && b!=m_bindings.end(); ++b) {
 581             if (ep=EndpointManager<SingleLogoutService>(idp->getSingleLogoutServices()).getByBinding(*b)) {
 582                 map<const XMLCh*,MessageEncoder*>::const_iterator enc = m_encoders.find(*b);
 583                 if (enc!=m_encoders.end())
 584                     encoder = enc->second;
 585                 break;
 586             }
 587         }
 588         if (!ep || !encoder) {
 589             auto_ptr_char id(dynamic_cast<EntityDescriptor*>(role->getParent())->getEntityID());
 590             m_log.error("unable to locate compatible SLO service for provider (%s)", id.get());
 591             MetadataException ex("Unable to locate endpoint at IdP ($entityID) to send LogoutResponse.");
 592             annotateException(&ex, role);   // throws it
 593         }
 594     }
 595     else {
 596         encoder = m_encoders.begin()->second;
 597     }
 598
 599     // Prepare response.
 600     auto_ptr<LogoutResponse> logout(LogoutResponseBuilder::buildLogoutResponse());
 601     logout->setInResponseTo(requestID);
 602     if (ep) {
 603         const XMLCh* loc = ep->getResponseLocation();
 604         if (!loc || !*loc)
 605             loc = ep->getLocation();
 606         logout->setDestination(loc);
 607     }
 608     Issuer* issuer = IssuerBuilder::buildIssuer();
 609     logout->setIssuer(issuer);
 610     issuer->setName(application.getRelyingParty(dynamic_cast<EntityDescriptor*>(role->getParent()))->getXMLString("entityID").second);
 611     fillStatus(*logout.get(), code, subcode, msg);
 612
 613     auto_ptr_char dest(logout->getDestination());
 614
 615     long ret = sendMessage(*encoder, logout.get(), relayState, dest.get(), role, application, httpResponse);
 616     logout.release();  // freed by encoder
 617     return make_pair(true,ret);
 618 }
 619
 620 #endif