shibsp/handler/impl/AssertionConsumerService.cpp

   1 /**
   2  * Licensed to the University Corporation for Advanced Internet
   3  * Development, Inc. (UCAID) under one or more contributor license
   4  * agreements. See the NOTICE file distributed with this work for
   5  * additional information regarding copyright ownership.
   6  *
   7  * UCAID licenses this file to you under the Apache License,
   8  * Version 2.0 (the "License"); you may not use this file except
   9  * in compliance with the License. You may obtain a copy of the
  10  * License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing,
  15  * software distributed under the License is distributed on an
  16  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
  17  * either express or implied. See the License for the specific
  18  * language governing permissions and limitations under the License.
  19  */
  20
  21 /**
  22  * AssertionConsumerService.cpp
  23  *
  24  * Base class for handlers that create sessions by consuming SSO protocol responses.
  25  */
  26
  27 #include "internal.h"
  28 #include "exceptions.h"
  29 #include "Application.h"
  30 #include "ServiceProvider.h"
  31 #include "SPRequest.h"
  32 #include "handler/AssertionConsumerService.h"
  33 #include "util/CGIParser.h"
  34 #include "util/SPConstants.h"
  35
  36 # include <ctime>
  37 #ifndef SHIBSP_LITE
  38 # include "attribute/Attribute.h"
  39 # include "attribute/filtering/AttributeFilter.h"
  40 # include "attribute/filtering/BasicFilteringContext.h"
  41 # include "attribute/resolver/AttributeExtractor.h"
  42 # include "attribute/resolver/AttributeResolver.h"
  43 # include "attribute/resolver/ResolutionContext.h"
  44 # include "metadata/MetadataProviderCriteria.h"
  45 # include "security/SecurityPolicy.h"
  46 # include "security/SecurityPolicyProvider.h"
  47 # include <boost/iterator/indirect_iterator.hpp>
  48 # include <saml/exceptions.h>
  49 # include <saml/SAMLConfig.h>
  50 # include <saml/saml1/core/Assertions.h>
  51 # include <saml/saml1/core/Protocols.h>
  52 # include <saml/saml2/core/Protocols.h>
  53 # include <saml/saml2/metadata/Metadata.h>
  54 # include <saml/util/CommonDomainCookie.h>
  55 using namespace samlconstants;
  56 using opensaml::saml2md::MetadataProvider;
  57 using opensaml::saml2md::RoleDescriptor;
  58 using opensaml::saml2md::EntityDescriptor;
  59 using opensaml::saml2md::IDPSSODescriptor;
  60 using opensaml::saml2md::SPSSODescriptor;
  61 #else
  62 # include "lite/CommonDomainCookie.h"
  63 #endif
  64
  65 #include <xmltooling/XMLToolingConfig.h>
  66 #include <xmltooling/util/URLEncoder.h>
  67
  68 using namespace shibspconstants;
  69 using namespace shibsp;
  70 using namespace opensaml;
  71 using namespace xmltooling;
  72 using namespace boost;
  73 using namespace std;
  74
  75 AssertionConsumerService::AssertionConsumerService(
  76     const DOMElement* e, const char* appId, Category& log, DOMNodeFilter* filter, const map<string,string>* remapper
  77     ) : AbstractHandler(e, log, filter, remapper)
  78 {
  79     if (!e)
  80         return;
  81     string address(appId);
  82     address += getString("Location").second;
  83     setAddress(address.c_str());
  84 #ifndef SHIBSP_LITE
  85     if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
  86         m_decoder.reset(
  87             SAMLConfig::getConfig().MessageDecoderManager.newPlugin(
  88                 getString("Binding").second, pair<const DOMElement*,const XMLCh*>(e,shibspconstants::SHIB2SPCONFIG_NS)
  89                 )
  90             );
  91         m_decoder->setArtifactResolver(SPConfig::getConfig().getArtifactResolver());
  92     }
  93 #endif
  94 }
  95
  96 AssertionConsumerService::~AssertionConsumerService()
  97 {
  98 }
  99
 100 pair<bool,long> AssertionConsumerService::run(SPRequest& request, bool isHandler) const
 101 {
 102     // Check for a message back to the ACS from a post-session hook.
 103     if (request.getQueryString() && strstr(request.getQueryString(), "hook=1")) {
 104         // Parse the query string only to preserve any POST data.
 105         CGIParser cgi(request, true);
 106         pair<CGIParser::walker,CGIParser::walker> param = cgi.getParameters("hook");
 107         if (param.first != param.second && param.first->second && !strcmp(param.first->second, "1")) {
 108             string target;
 109             param = cgi.getParameters("target");
 110             if (param.first != param.second && param.first->second)
 111                 target = param.first->second;
 112             return finalizeResponse(request.getApplication(), request, request, target);
 113         }
 114     }
 115
 116     if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
 117         // When out of process, we run natively and directly process the message.
 118         return processMessage(request.getApplication(), request, request);
 119     }
 120     else {
 121         // When not out of process, we remote all the message processing.
 122         vector<string> headers(1, "Cookie");
 123         headers.push_back("User-Agent");
 124         headers.push_back("Accept-Language");
 125         DDF out,in = wrap(request, &headers);
 126         DDFJanitor jin(in), jout(out);
 127         out = request.getServiceProvider().getListenerService()->send(in);
 128         return unwrap(request, out);
 129     }
 130 }
 131
 132 void AssertionConsumerService::receive(DDF& in, ostream& out)
 133 {
 134     // Find application.
 135     const char* aid = in["application_id"].string();
 136     const Application* app = aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : nullptr;
 137     if (!app) {
 138         // Something's horribly wrong.
 139         m_log.error("couldn't find application (%s) for new session", aid ? aid : "(missing)");
 140         throw ConfigurationException("Unable to locate application for new session, deleted?");
 141     }
 142
 143     // Unpack the request.
 144     scoped_ptr<HTTPRequest> req(getRequest(in));
 145
 146     // Wrap a response shim.
 147     DDF ret(nullptr);
 148     DDFJanitor jout(ret);
 149     scoped_ptr<HTTPResponse> resp(getResponse(ret));
 150
 151     // Since we're remoted, the result should either be a throw, a false/0 return,
 152     // which we just return as an empty structure, or a response/redirect,
 153     // which we capture in the facade and send back.
 154     processMessage(*app, *req, *resp);
 155     out << ret;
 156 }
 157
 158 pair<bool,long> AssertionConsumerService::processMessage(
 159     const Application& application, const HTTPRequest& httpRequest, HTTPResponse& httpResponse
 160     ) const
 161 {
 162 #ifndef SHIBSP_LITE
 163     // Locate policy key.
 164     pair<bool,const char*> prop = getString("policyId", m_configNS.get());  // namespace-qualified if inside handler element
 165     if (!prop.first)
 166         prop = application.getString("policyId");   // unqualified in Application(s) element
 167
 168     // Lock metadata for use by policy.
 169     Locker metadataLocker(application.getMetadataProvider());
 170
 171     // Create the policy.
 172     scoped_ptr<opensaml::SecurityPolicy> policy(
 173         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(
 174             application, &IDPSSODescriptor::ELEMENT_QNAME, prop.second
 175             )
 176         );
 177
 178     string relayState;
 179     scoped_ptr<XMLObject> msg;
 180     try {
 181         // Decode the message and process it in a protocol-specific way.
 182         msg.reset(m_decoder->decode(relayState, httpRequest, *(policy.get())));
 183         if (!msg)
 184             throw BindingException("Failed to decode an SSO protocol response.");
 185         implementProtocol(application, httpRequest, httpResponse, *policy, nullptr, *msg);
 186
 187         // History cookie.
 188         auto_ptr_char issuer(policy->getIssuer() ? policy->getIssuer()->getName() : nullptr);
 189         if (issuer.get() && *issuer.get())
 190             maintainHistory(application, httpRequest, httpResponse, issuer.get());
 191
 192         const EntityDescriptor* entity =
 193             dynamic_cast<const EntityDescriptor*>(policy->getIssuerMetadata() ? policy->getIssuerMetadata()->getParent() : nullptr);
 194         prop = application.getRelyingParty(entity)->getString("sessionHook");
 195         if (prop.first) {
 196             string hook(prop.second);
 197             httpRequest.absolutize(hook);
 198
 199             // Compute the return URL. We use a self-referential link plus a hook indicator to break the cycle
 200             // and the relay state.
 201             const URLEncoder* encoder = XMLToolingConfig::getConfig().getURLEncoder();
 202             string returnURL = httpRequest.getRequestURL();
 203             returnURL = returnURL.substr(0, returnURL.find('?')) + "?hook=1";
 204             if (!relayState.empty())
 205                 returnURL += "&target=" + encoder->encode(relayState.c_str());
 206             if (hook.find('?') == string::npos)
 207                 hook += '?';
 208             else
 209                 hook += '&';
 210             hook += "return=" + encoder->encode(returnURL.c_str());
 211
 212             // Add the translated target resource in case it's of interest.
 213             if (!relayState.empty()) {
 214                 try {
 215                     recoverRelayState(application, httpRequest, httpResponse, relayState, false);
 216                     hook += "&target=" + encoder->encode(relayState.c_str());
 217                 }
 218                 catch (std::exception& ex) {
 219                     m_log.warn("error recovering relay state: %s", ex.what());
 220                 }
 221             }
 222
 223             return make_pair(true, httpResponse.sendRedirect(hook.c_str()));
 224         }
 225
 226         return finalizeResponse(application, httpRequest, httpResponse, relayState);
 227     }
 228     catch (XMLToolingException& ex) {
 229         // Check for isPassive error condition.
 230         const char* sc2 = ex.getProperty("statusCode2");
 231         if (sc2 && !strcmp(sc2, "urn:oasis:names:tc:SAML:2.0:status:NoPassive")) {
 232             pair<bool,bool> ignore = getBool("ignoreNoPassive", m_configNS.get());  // namespace-qualified if inside handler element
 233             if (ignore.first && ignore.second && !relayState.empty()) {
 234                 m_log.debug("ignoring SAML status of NoPassive and redirecting to resource...");
 235                 return make_pair(true, httpResponse.sendRedirect(relayState.c_str()));
 236             }
 237         }
 238         if (!relayState.empty()) {
 239             try {
 240                 recoverRelayState(application, httpRequest, httpResponse, relayState, false);
 241             }
 242             catch (std::exception& rsex) {
 243                 m_log.warn("error recovering relay state: %s", rsex.what());
 244             }
 245             ex.addProperty("RelayState", relayState.c_str());
 246         }
 247
 248         // Log the error.
 249         try {
 250             scoped_ptr<TransactionLog::Event> event(SPConfig::getConfig().EventManager.newPlugin(LOGIN_EVENT, nullptr));
 251             LoginEvent* error_event = dynamic_cast<LoginEvent*>(event.get());
 252             if (error_event) {
 253                 error_event->m_exception = &ex;
 254                 error_event->m_request = &httpRequest;
 255                 error_event->m_app = &application;
 256                 if (policy->getIssuerMetadata())
 257                     error_event->m_peer = dynamic_cast<const EntityDescriptor*>(policy->getIssuerMetadata()->getParent());
 258                 auto_ptr_char prot(getProtocolFamily());
 259                 error_event->m_protocol = prot.get();
 260                 error_event->m_binding = getString("Binding").second;
 261                 error_event->m_saml2Response = dynamic_cast<const saml2p::StatusResponseType*>(msg.get());
 262                 if (!error_event->m_saml2Response)
 263                     error_event->m_saml1Response = dynamic_cast<const saml1p::Response*>(msg.get());
 264                 application.getServiceProvider().getTransactionLog()->write(*error_event);
 265             }
 266             else {
 267                 m_log.warn("unable to audit event, log event object was of an incorrect type");
 268             }
 269         }
 270         catch (std::exception& ex2) {
 271             m_log.warn("exception auditing event: %s", ex2.what());
 272         }
 273
 274         // If no sign of annotation, try to annotate it now.
 275         if (!ex.getProperty("statusCode")) {
 276             annotateException(&ex, policy->getIssuerMetadata(), nullptr, false);    // wait to throw it
 277         }
 278
 279         throw;
 280     }
 281 #else
 282     throw ConfigurationException("Cannot process message using lite version of shibsp library.");
 283 #endif
 284 }
 285
 286 pair<bool,long> AssertionConsumerService::finalizeResponse(
 287     const Application& application, const HTTPRequest& httpRequest, HTTPResponse& httpResponse, string& relayState
 288     ) const
 289 {
 290     DDF postData = recoverPostData(application, httpRequest, httpResponse, relayState.c_str());
 291     DDFJanitor postjan(postData);
 292     recoverRelayState(application, httpRequest, httpResponse, relayState);
 293     application.limitRedirect(httpRequest, relayState.c_str());
 294
 295     // Now redirect to the state value. By now, it should be set to *something* usable.
 296     // First check for POST data.
 297     if (!postData.islist()) {
 298         m_log.debug("ACS returning via redirect to: %s", relayState.c_str());
 299         return make_pair(true, httpResponse.sendRedirect(relayState.c_str()));
 300     }
 301     else {
 302         m_log.debug("ACS returning via POST to: %s", relayState.c_str());
 303         return make_pair(true, sendPostResponse(application, httpResponse, relayState.c_str(), postData));
 304     }
 305 }
 306
 307 void AssertionConsumerService::checkAddress(const Application& application, const HTTPRequest& httpRequest, const char* issuedTo) const
 308 {
 309     if (!issuedTo || !*issuedTo)
 310         return;
 311
 312     const PropertySet* props = application.getPropertySet("Sessions");
 313     pair<bool,bool> checkAddress = props ? props->getBool("checkAddress") : make_pair(false,true);
 314     if (!checkAddress.first)
 315         checkAddress.second = true;
 316
 317     if (checkAddress.second) {
 318         m_log.debug("checking client address");
 319         if (httpRequest.getRemoteAddr() != issuedTo) {
 320             throw FatalProfileException(
 321                "Your client's current address ($client_addr) differs from the one used when you authenticated "
 322                 "to your identity provider. To correct this problem, you may need to bypass a proxy server. "
 323                 "Please contact your local support staff or help desk for assistance.",
 324                 namedparams(1, "client_addr", httpRequest.getRemoteAddr().c_str())
 325                 );
 326         }
 327     }
 328 }
 329
 330 #ifndef SHIBSP_LITE
 331
 332 const XMLCh* AssertionConsumerService::getProtocolFamily() const
 333 {
 334     return m_decoder ? m_decoder->getProtocolFamily() : nullptr;
 335 }
 336
 337 const char* AssertionConsumerService::getType() const
 338 {
 339     return "AssertionConsumerService";
 340 }
 341
 342 void AssertionConsumerService::generateMetadata(SPSSODescriptor& role, const char* handlerURL) const
 343 {
 344     // Initial guess at index to use.
 345     pair<bool,unsigned int> ix = pair<bool,unsigned int>(false,0);
 346     if (!strncmp(handlerURL, "https", 5))
 347         ix = getUnsignedInt("sslIndex", shibspconstants::ASCII_SHIB2SPCONFIG_NS);
 348     if (!ix.first)
 349         ix = getUnsignedInt("index");
 350     if (!ix.first)
 351         ix.second = 1;
 352
 353     // Find maximum index in use and go one higher.
 354     const vector<saml2md::AssertionConsumerService*>& services = const_cast<const SPSSODescriptor&>(role).getAssertionConsumerServices();
 355     if (!services.empty() && ix.second <= services.back()->getIndex().second)
 356         ix.second = services.back()->getIndex().second + 1;
 357
 358     const char* loc = getString("Location").second;
 359     string hurl(handlerURL);
 360     if (*loc != '/')
 361         hurl += '/';
 362     hurl += loc;
 363     auto_ptr_XMLCh widen(hurl.c_str());
 364
 365     saml2md::AssertionConsumerService* ep = saml2md::AssertionConsumerServiceBuilder::buildAssertionConsumerService();
 366     ep->setLocation(widen.get());
 367     ep->setBinding(getXMLString("Binding").second);
 368     ep->setIndex(ix.second);
 369     role.getAssertionConsumerServices().push_back(ep);
 370 }
 371
 372 opensaml::SecurityPolicy* AssertionConsumerService::createSecurityPolicy(
 373     const Application& application, const xmltooling::QName* role, bool validate, const char* policyId
 374     ) const
 375 {
 376     return new SecurityPolicy(application, role, validate, policyId);
 377 }
 378
 379 namespace {
 380     class SHIBSP_DLLLOCAL DummyContext : public ResolutionContext
 381     {
 382     public:
 383         DummyContext(const vector<Attribute*>& attributes) : m_attributes(attributes) {
 384         }
 385
 386         virtual ~DummyContext() {
 387             for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<Attribute>());
 388         }
 389
 390         vector<Attribute*>& getResolvedAttributes() {
 391             return m_attributes;
 392         }
 393         vector<Assertion*>& getResolvedAssertions() {
 394             return m_tokens;
 395         }
 396
 397     private:
 398         vector<Attribute*> m_attributes;
 399         static vector<Assertion*> m_tokens; // never any tokens, so just share an empty vector
 400     };
 401 };
 402
 403 vector<Assertion*> DummyContext::m_tokens;
 404
 405 ResolutionContext* AssertionConsumerService::resolveAttributes(
 406     const Application& application,
 407     const saml2md::RoleDescriptor* issuer,
 408     const XMLCh* protocol,
 409     const saml1::NameIdentifier* v1nameid,
 410     const saml2::NameID* nameid,
 411     const XMLCh* authncontext_class,
 412     const XMLCh* authncontext_decl,
 413     const vector<const Assertion*>* tokens
 414     ) const
 415 {
 416     return resolveAttributes(
 417         application,
 418         nullptr,
 419         issuer,
 420         protocol,
 421         nullptr,
 422         v1nameid,
 423         nullptr,
 424         nameid,
 425         nullptr,
 426         authncontext_class,
 427         authncontext_decl,
 428         tokens
 429         );
 430 }
 431
 432 ResolutionContext* AssertionConsumerService::resolveAttributes(
 433     const Application& application,
 434     const GenericRequest* request,
 435     const RoleDescriptor* issuer,
 436     const XMLCh* protocol,
 437     const xmltooling::XMLObject* protmsg,
 438     const saml1::NameIdentifier* v1nameid,
 439     const saml1::AuthenticationStatement* v1statement,
 440     const saml2::NameID* nameid,
 441     const saml2::AuthnStatement* statement,
 442     const XMLCh* authncontext_class,
 443     const XMLCh* authncontext_decl,
 444     const vector<const Assertion*>* tokens
 445     ) const
 446 {
 447     // First we do the extraction of any pushed information, including from metadata.
 448     vector<Attribute*> resolvedAttributes;
 449     AttributeExtractor* extractor = application.getAttributeExtractor();
 450     if (extractor) {
 451         Locker extlocker(extractor);
 452         if (issuer) {
 453             pair<bool,const char*> mprefix = application.getString("metadataAttributePrefix");
 454             if (mprefix.first) {
 455                 m_log.debug("extracting metadata-derived attributes...");
 456                 try {
 457                     // We pass nullptr for "issuer" because the IdP isn't the one asserting metadata-based attributes.
 458                     extractor->extractAttributes(application, request, nullptr, *issuer, resolvedAttributes);
 459                     for (indirect_iterator<vector<Attribute*>::iterator> a = make_indirect_iterator(resolvedAttributes.begin());
 460                             a != make_indirect_iterator(resolvedAttributes.end()); ++a) {
 461                         vector<string>& ids = a->getAliases();
 462                         for (vector<string>::iterator id = ids.begin(); id != ids.end(); ++id)
 463                             *id = mprefix.second + *id;
 464                     }
 465                 }
 466                 catch (std::exception& ex) {
 467                     m_log.error("caught exception extracting attributes: %s", ex.what());
 468                 }
 469             }
 470         }
 471
 472         m_log.debug("extracting pushed attributes...");
 473
 474         if (protmsg) {
 475             try {
 476                 extractor->extractAttributes(application, request, issuer, *protmsg, resolvedAttributes);
 477             }
 478             catch (std::exception& ex) {
 479                 m_log.error("caught exception extracting attributes: %s", ex.what());
 480             }
 481         }
 482
 483         if (v1nameid || nameid) {
 484             try {
 485                 if (v1nameid)
 486                     extractor->extractAttributes(application, request, issuer, *v1nameid, resolvedAttributes);
 487                 else
 488                     extractor->extractAttributes(application, request, issuer, *nameid, resolvedAttributes);
 489             }
 490             catch (std::exception& ex) {
 491                 m_log.error("caught exception extracting attributes: %s", ex.what());
 492             }
 493         }
 494
 495         if (v1statement || statement) {
 496             try {
 497                 if (v1statement)
 498                     extractor->extractAttributes(application, request, issuer, *v1statement, resolvedAttributes);
 499                 else
 500                     extractor->extractAttributes(application, request, issuer, *statement, resolvedAttributes);
 501             }
 502             catch (std::exception& ex) {
 503                 m_log.error("caught exception extracting attributes: %s", ex.what());
 504             }
 505         }
 506
 507         if (tokens) {
 508             for (indirect_iterator<vector<const Assertion*>::const_iterator> t = make_indirect_iterator(tokens->begin());
 509                     t != make_indirect_iterator(tokens->end()); ++t) {
 510                 try {
 511                     extractor->extractAttributes(application, request, issuer, *t, resolvedAttributes);
 512                 }
 513                 catch (std::exception& ex) {
 514                     m_log.error("caught exception extracting attributes: %s", ex.what());
 515                 }
 516             }
 517         }
 518
 519         AttributeFilter* filter = application.getAttributeFilter();
 520         if (filter && !resolvedAttributes.empty()) {
 521             BasicFilteringContext fc(application, resolvedAttributes, issuer, authncontext_class, authncontext_decl);
 522             Locker filtlocker(filter);
 523             try {
 524                 filter->filterAttributes(fc, resolvedAttributes);
 525             }
 526             catch (std::exception& ex) {
 527                 m_log.error("caught exception filtering attributes: %s", ex.what());
 528                 m_log.error("dumping extracted attributes due to filtering exception");
 529                 for_each(resolvedAttributes.begin(), resolvedAttributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 530                 resolvedAttributes.clear();
 531             }
 532         }
 533     }
 534     else {
 535         m_log.warn("no AttributeExtractor plugin installed, check log during startup");
 536     }
 537
 538     try {
 539         AttributeResolver* resolver = application.getAttributeResolver();
 540         if (resolver) {
 541             m_log.debug("resolving attributes...");
 542
 543             Locker locker(resolver);
 544             auto_ptr<ResolutionContext> ctx(
 545                 resolver->createResolutionContext(
 546                     application,
 547                     request,
 548                     issuer ? dynamic_cast<const saml2md::EntityDescriptor*>(issuer->getParent()) : nullptr,
 549                     protocol,
 550                     nameid,
 551                     authncontext_class,
 552                     authncontext_decl,
 553                     tokens,
 554                     &resolvedAttributes
 555                     )
 556                 );
 557             resolver->resolveAttributes(*ctx);
 558             // Copy over any pushed attributes.
 559             while (!resolvedAttributes.empty()) {
 560                 ctx->getResolvedAttributes().push_back(resolvedAttributes.back());
 561                 resolvedAttributes.pop_back();
 562             }
 563             return ctx.release();
 564         }
 565     }
 566     catch (std::exception& ex) {
 567         m_log.error("attribute resolution failed: %s", ex.what());
 568     }
 569
 570     if (!resolvedAttributes.empty()) {
 571         try {
 572             return new DummyContext(resolvedAttributes);
 573         }
 574         catch (bad_alloc&) {
 575             for_each(resolvedAttributes.begin(), resolvedAttributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 576         }
 577     }
 578     return nullptr;
 579 }
 580
 581 void AssertionConsumerService::extractMessageDetails(const Assertion& assertion, const XMLCh* protocol, opensaml::SecurityPolicy& policy) const
 582 {
 583     policy.setMessageID(assertion.getID());
 584     policy.setIssueInstant(assertion.getIssueInstantEpoch());
 585
 586     if (XMLString::equals(assertion.getElementQName().getNamespaceURI(), samlconstants::SAML20_NS)) {
 587         const saml2::Assertion* a2 = dynamic_cast<const saml2::Assertion*>(&assertion);
 588         if (a2) {
 589             m_log.debug("extracting issuer from SAML 2.0 assertion");
 590             policy.setIssuer(a2->getIssuer());
 591         }
 592     }
 593     else {
 594         const saml1::Assertion* a1 = dynamic_cast<const saml1::Assertion*>(&assertion);
 595         if (a1) {
 596             m_log.debug("extracting issuer from SAML 1.x assertion");
 597             policy.setIssuer(a1->getIssuer());
 598         }
 599     }
 600
 601     if (policy.getIssuer() && !policy.getIssuerMetadata() && policy.getMetadataProvider()) {
 602         if (policy.getIssuer()->getFormat() && !XMLString::equals(policy.getIssuer()->getFormat(), saml2::NameIDType::ENTITY)) {
 603             m_log.warn("non-system entity issuer, skipping metadata lookup");
 604             return;
 605         }
 606         m_log.debug("searching metadata for assertion issuer...");
 607         pair<const EntityDescriptor*,const RoleDescriptor*> entity;
 608         MetadataProvider::Criteria& mc = policy.getMetadataProviderCriteria();
 609         mc.entityID_unicode = policy.getIssuer()->getName();
 610         mc.role = &IDPSSODescriptor::ELEMENT_QNAME;
 611         mc.protocol = protocol;
 612         entity = policy.getMetadataProvider()->getEntityDescriptor(mc);
 613         if (!entity.first) {
 614             auto_ptr_char iname(policy.getIssuer()->getName());
 615             m_log.warn("no metadata found, can't establish identity of issuer (%s)", iname.get());
 616         }
 617         else if (!entity.second) {
 618             m_log.warn("unable to find compatible IdP role in metadata");
 619         }
 620         else {
 621             policy.setIssuerMetadata(entity.second);
 622         }
 623     }
 624 }
 625
 626 LoginEvent* AssertionConsumerService::newLoginEvent(const Application& application, const HTTPRequest& request) const
 627 {
 628     if (!SPConfig::getConfig().isEnabled(SPConfig::Logging))
 629         return nullptr;
 630     try {
 631         auto_ptr<TransactionLog::Event> event(SPConfig::getConfig().EventManager.newPlugin(LOGIN_EVENT, nullptr));
 632         LoginEvent* login_event = dynamic_cast<LoginEvent*>(event.get());
 633         if (login_event) {
 634             login_event->m_request = &request;
 635             login_event->m_app = &application;
 636             login_event->m_binding = getString("Binding").second;
 637             event.release();
 638             return login_event;
 639         }
 640         else {
 641             m_log.warn("unable to audit event, log event object was of an incorrect type");
 642         }
 643     }
 644     catch (std::exception& ex) {
 645         m_log.warn("exception auditing event: %s", ex.what());
 646     }
 647     return nullptr;
 648 }
 649
 650 #endif
 651
 652 void AssertionConsumerService::maintainHistory(
 653     const Application& application, const HTTPRequest& request, HTTPResponse& response, const char* entityID
 654     ) const
 655 {
 656     static const char* defProps="; path=/";
 657
 658     const PropertySet* sessionProps=application.getPropertySet("Sessions");
 659     pair<bool,bool> idpHistory=sessionProps->getBool("idpHistory");
 660
 661     if (idpHistory.first && idpHistory.second) {
 662         pair<bool,const char*> cookieProps=sessionProps->getString("idpHistoryProps");
 663         if (!cookieProps.first)
 664             cookieProps=sessionProps->getString("cookieProps");
 665         if (!cookieProps.first)
 666             cookieProps.second=defProps;
 667
 668         // Set an IdP history cookie locally (essentially just a CDC).
 669         CommonDomainCookie cdc(request.getCookie(CommonDomainCookie::CDCName));
 670
 671         // Either leave in memory or set an expiration.
 672         pair<bool,unsigned int> days=sessionProps->getUnsignedInt("idpHistoryDays");
 673         if (!days.first || days.second==0) {
 674             string c = string(cdc.set(entityID)) + cookieProps.second;
 675             response.setCookie(CommonDomainCookie::CDCName, c.c_str());
 676         }
 677         else {
 678             time_t now=time(nullptr) + (days.second * 24 * 60 * 60);
 679 #ifdef HAVE_GMTIME_R
 680             struct tm res;
 681             struct tm* ptime=gmtime_r(&now,&res);
 682 #else
 683             struct tm* ptime=gmtime(&now);
 684 #endif
 685             char timebuf[64];
 686             strftime(timebuf,64,"%a, %d %b %Y %H:%M:%S GMT",ptime);
 687             string c = string(cdc.set(entityID)) + cookieProps.second + "; expires=" + timebuf;
 688             response.setCookie(CommonDomainCookie::CDCName, c.c_str());
 689         }
 690     }
 691 }