shibsp/attribute/resolver/impl/QueryAttributeResolver.cpp

   1 /*
   2  *  Copyright 2001-2010 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  * QueryAttributeResolver.cpp
  19  *
  20  * AttributeResolver based on SAML queries.
  21  */
  22
  23 #include "internal.h"
  24 #include "Application.h"
  25 #include "ServiceProvider.h"
  26 #include "SessionCache.h"
  27 #include "attribute/Attribute.h"
  28 #include "attribute/filtering/AttributeFilter.h"
  29 #include "attribute/filtering/BasicFilteringContext.h"
  30 #include "attribute/resolver/AttributeExtractor.h"
  31 #include "attribute/resolver/AttributeResolver.h"
  32 #include "attribute/resolver/ResolutionContext.h"
  33 #include "binding/SOAPClient.h"
  34 #include "metadata/MetadataProviderCriteria.h"
  35 #include "security/SecurityPolicy.h"
  36 #include "security/SecurityPolicyProvider.h"
  37 #include "util/SPConstants.h"
  38
  39 #include <saml/exceptions.h>
  40 #include <saml/saml1/binding/SAML1SOAPClient.h>
  41 #include <saml/saml1/core/Assertions.h>
  42 #include <saml/saml1/core/Protocols.h>
  43 #include <saml/saml2/binding/SAML2SOAPClient.h>
  44 #include <saml/saml2/core/Protocols.h>
  45 #include <saml/saml2/metadata/Metadata.h>
  46 #include <saml/saml2/metadata/MetadataCredentialCriteria.h>
  47 #include <saml/saml2/metadata/MetadataProvider.h>
  48 #include <xmltooling/util/NDC.h>
  49 #include <xmltooling/util/XMLHelper.h>
  50 #include <xercesc/util/XMLUniDefs.hpp>
  51
  52 using namespace shibsp;
  53 using namespace opensaml::saml1;
  54 using namespace opensaml::saml1p;
  55 using namespace opensaml::saml2;
  56 using namespace opensaml::saml2p;
  57 using namespace opensaml::saml2md;
  58 using namespace opensaml;
  59 using namespace xmltooling;
  60 using namespace std;
  61
  62 namespace shibsp {
  63
  64     class SHIBSP_DLLLOCAL QueryContext : public ResolutionContext
  65     {
  66     public:
  67         QueryContext(const Application& application, const Session& session)
  68                 : m_query(true), m_app(application), m_session(&session), m_metadata(nullptr), m_entity(nullptr), m_nameid(nullptr) {
  69             m_protocol = XMLString::transcode(session.getProtocol());
  70             m_class = XMLString::transcode(session.getAuthnContextClassRef());
  71             m_decl = XMLString::transcode(session.getAuthnContextDeclRef());
  72         }
  73
  74         QueryContext(
  75             const Application& application,
  76             const EntityDescriptor* issuer,
  77             const XMLCh* protocol,
  78             const NameID* nameid=nullptr,
  79             const XMLCh* authncontext_class=nullptr,
  80             const XMLCh* authncontext_decl=nullptr,
  81             const vector<const opensaml::Assertion*>* tokens=nullptr
  82             ) : m_query(true), m_app(application), m_session(nullptr), m_metadata(nullptr), m_entity(issuer),
  83                 m_protocol(protocol), m_nameid(nameid), m_class(authncontext_class), m_decl(authncontext_decl) {
  84
  85             if (tokens) {
  86                 for (vector<const opensaml::Assertion*>::const_iterator t = tokens->begin(); t!=tokens->end(); ++t) {
  87                     const saml2::Assertion* token2 = dynamic_cast<const saml2::Assertion*>(*t);
  88                     if (token2 && !token2->getAttributeStatements().empty()) {
  89                         m_query = false;
  90                     }
  91                     else {
  92                         const saml1::Assertion* token1 = dynamic_cast<const saml1::Assertion*>(*t);
  93                         if (token1 && !token1->getAttributeStatements().empty()) {
  94                             m_query = false;
  95                         }
  96                     }
  97                 }
  98             }
  99         }
 100
 101         ~QueryContext() {
 102             if (m_session) {
 103                 XMLString::release((XMLCh**)&m_protocol);
 104                 XMLString::release((XMLCh**)&m_class);
 105                 XMLString::release((XMLCh**)&m_decl);
 106             }
 107             if (m_metadata)
 108                 m_metadata->unlock();
 109             for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 110             for_each(m_assertions.begin(), m_assertions.end(), xmltooling::cleanup<opensaml::Assertion>());
 111         }
 112
 113         bool doQuery() const {
 114             return m_query;
 115         }
 116
 117         const Application& getApplication() const {
 118             return m_app;
 119         }
 120         const EntityDescriptor* getEntityDescriptor() const {
 121             if (m_entity)
 122                 return m_entity;
 123             if (m_session && m_session->getEntityID()) {
 124                 m_metadata = m_app.getMetadataProvider(false);
 125                 if (m_metadata) {
 126                     m_metadata->lock();
 127                     return m_entity = m_metadata->getEntityDescriptor(MetadataProviderCriteria(m_app, m_session->getEntityID())).first;
 128                 }
 129             }
 130             return nullptr;
 131         }
 132         const XMLCh* getProtocol() const {
 133             return m_protocol;
 134         }
 135         const NameID* getNameID() const {
 136             return m_session ? m_session->getNameID() : m_nameid;
 137         }
 138         const XMLCh* getClassRef() const {
 139             return m_class;
 140         }
 141         const XMLCh* getDeclRef() const {
 142             return m_decl;
 143         }
 144         const Session* getSession() const {
 145             return m_session;
 146         }
 147         vector<shibsp::Attribute*>& getResolvedAttributes() {
 148             return m_attributes;
 149         }
 150         vector<opensaml::Assertion*>& getResolvedAssertions() {
 151             return m_assertions;
 152         }
 153
 154     private:
 155         bool m_query;
 156         const Application& m_app;
 157         const Session* m_session;
 158         mutable MetadataProvider* m_metadata;
 159         mutable const EntityDescriptor* m_entity;
 160         const XMLCh* m_protocol;
 161         const NameID* m_nameid;
 162         const XMLCh* m_class;
 163         const XMLCh* m_decl;
 164         vector<shibsp::Attribute*> m_attributes;
 165         vector<opensaml::Assertion*> m_assertions;
 166     };
 167
 168     class SHIBSP_DLLLOCAL QueryResolver : public AttributeResolver
 169     {
 170     public:
 171         QueryResolver(const DOMElement* e);
 172         ~QueryResolver() {
 173             for_each(m_SAML1Designators.begin(), m_SAML1Designators.end(), xmltooling::cleanup<AttributeDesignator>());
 174             for_each(m_SAML2Designators.begin(), m_SAML2Designators.end(), xmltooling::cleanup<saml2::Attribute>());
 175         }
 176
 177         Lockable* lock() {return this;}
 178         void unlock() {}
 179
 180         ResolutionContext* createResolutionContext(
 181             const Application& application,
 182             const EntityDescriptor* issuer,
 183             const XMLCh* protocol,
 184             const NameID* nameid=nullptr,
 185             const XMLCh* authncontext_class=nullptr,
 186             const XMLCh* authncontext_decl=nullptr,
 187             const vector<const opensaml::Assertion*>* tokens=nullptr,
 188             const vector<shibsp::Attribute*>* attributes=nullptr
 189             ) const {
 190             return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens);
 191         }
 192
 193         ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
 194             return new QueryContext(application,session);
 195         }
 196
 197         void resolveAttributes(ResolutionContext& ctx) const;
 198
 199         void getAttributeIds(vector<string>& attributes) const {
 200             // Nothing to do, only the extractor would actually generate them.
 201         }
 202
 203     private:
 204         bool SAML1Query(QueryContext& ctx) const;
 205         bool SAML2Query(QueryContext& ctx) const;
 206
 207         Category& m_log;
 208         string m_policyId;
 209         bool m_subjectMatch;
 210         vector<AttributeDesignator*> m_SAML1Designators;
 211         vector<saml2::Attribute*> m_SAML2Designators;
 212     };
 213
 214     AttributeResolver* SHIBSP_DLLLOCAL QueryResolverFactory(const DOMElement* const & e)
 215     {
 216         return new QueryResolver(e);
 217     }
 218
 219     static const XMLCh policyId[] =     UNICODE_LITERAL_8(p,o,l,i,c,y,I,d);
 220     static const XMLCh subjectMatch[] = UNICODE_LITERAL_12(s,u,b,j,e,c,t,M,a,t,c,h);
 221 };
 222
 223 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver.Query")), m_subjectMatch(false)
 224 {
 225 #ifdef _DEBUG
 226     xmltooling::NDC ndc("QueryResolver");
 227 #endif
 228
 229     const XMLCh* pid = e ? e->getAttributeNS(nullptr, policyId) : nullptr;
 230     if (pid && *pid) {
 231         auto_ptr_char temp(pid);
 232         m_policyId = temp.get();
 233     }
 234     pid = e ? e->getAttributeNS(nullptr, subjectMatch) : nullptr;
 235     if (pid && (*pid == chLatin_t || *pid == chDigit_1))
 236         m_subjectMatch = true;
 237
 238     DOMElement* child = XMLHelper::getFirstChildElement(e);
 239     while (child) {
 240         try {
 241             if (XMLHelper::isNodeNamed(child, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 242                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 243                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 244                 if (down) {
 245                     m_SAML2Designators.push_back(down);
 246                     obj.release();
 247                 }
 248             }
 249             else if (XMLHelper::isNodeNamed(child, samlconstants::SAML1_NS, AttributeDesignator::LOCAL_NAME)) {
 250                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 251                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 252                 if (down) {
 253                     m_SAML1Designators.push_back(down);
 254                     obj.release();
 255                 }
 256             }
 257         }
 258         catch (exception& ex) {
 259             m_log.error("exception loading attribute designator: %s", ex.what());
 260         }
 261         child = XMLHelper::getNextSiblingElement(child);
 262     }
 263 }
 264
 265 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 266 {
 267 #ifdef _DEBUG
 268     xmltooling::NDC ndc("query");
 269 #endif
 270
 271     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 272     const AttributeAuthorityDescriptor* AA =
 273         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 274     if (!AA) {
 275         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 276         return false;
 277     }
 278
 279     const Application& application = ctx.getApplication();
 280     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 281
 282     // Locate policy key.
 283     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 284
 285     // Set up policy and SOAP client.
 286     auto_ptr<SecurityPolicy> policy(
 287         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 288         );
 289     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 290     MetadataCredentialCriteria mcc(*AA);
 291     shibsp::SOAPClient soaper(*policy.get());
 292
 293     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 294     saml1p::Response* response=nullptr;
 295     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 296     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 297         if (!XMLString::equals((*ep)->getBinding(),binding.get()) || !(*ep)->getLocation())
 298             continue;
 299         auto_ptr_char loc((*ep)->getLocation());
 300         try {
 301             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 302             nameid->setName(ctx.getNameID()->getName());
 303             nameid->setFormat(ctx.getNameID()->getFormat());
 304             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 305             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 306             subject->setNameIdentifier(nameid);
 307             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 308             query->setSubject(subject);
 309             query->setResource(relyingParty->getXMLString("entityID").second);
 310             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 311                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 312             Request* request = RequestBuilder::buildRequest();
 313             request->setAttributeQuery(query);
 314             request->setMinorVersion(version);
 315
 316             SAML1SOAPClient client(soaper, false);
 317             client.sendSAML(request, application.getId(), mcc, loc.get());
 318             response = client.receiveSAML();
 319         }
 320         catch (exception& ex) {
 321             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 322             soaper.reset();
 323         }
 324     }
 325
 326     if (!response) {
 327         m_log.error("unable to obtain a SAML response from attribute authority");
 328         return false;
 329     }
 330     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==nullptr ||
 331             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 332         delete response;
 333         m_log.error("attribute authority returned a SAML error");
 334         return true;
 335     }
 336
 337     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 338     if (assertions.empty()) {
 339         delete response;
 340         m_log.warn("response from attribute authority was empty");
 341         return true;
 342     }
 343     else if (assertions.size()>1)
 344         m_log.warn("simple resolver only supports one assertion in the query response");
 345
 346     auto_ptr<saml1p::Response> wrapper(response);
 347     saml1::Assertion* newtoken = assertions.front();
 348
 349     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 350     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 351         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 352         return true;
 353     }
 354
 355     try {
 356         // We're going to insist that the assertion issuer is the same as the peer.
 357         // Reset the policy's message bits and extract them from the assertion.
 358         policy->reset(true);
 359         policy->setMessageID(newtoken->getAssertionID());
 360         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 361         policy->setIssuer(newtoken->getIssuer());
 362         policy->evaluate(*newtoken);
 363
 364         // Now we can check the security status of the policy.
 365         if (!policy->isAuthenticated())
 366             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 367     }
 368     catch (exception& ex) {
 369         m_log.error("assertion failed policy validation: %s", ex.what());
 370         return true;
 371     }
 372
 373     newtoken->detach();
 374     wrapper.release();  // detach blows away the Response
 375     ctx.getResolvedAssertions().push_back(newtoken);
 376
 377     // Finally, extract and filter the result.
 378     try {
 379         AttributeExtractor* extractor = application.getAttributeExtractor();
 380         if (extractor) {
 381             Locker extlocker(extractor);
 382             const vector<saml1::AttributeStatement*>& statements = const_cast<const saml1::Assertion*>(newtoken)->getAttributeStatements();
 383             for (vector<saml1::AttributeStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
 384                 if (m_subjectMatch) {
 385                     // Check for subject match.
 386                     const NameIdentifier* respName = (*s)->getSubject() ? (*s)->getSubject()->getNameIdentifier() : nullptr;
 387                     if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 388                         !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 389                         !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier())) {
 390                         if (respName)
 391                             m_log.warnStream() << "ignoring AttributeStatement without strongly matching NameIdentifier in Subject: " <<
 392                                 *respName << logging::eol;
 393                         else
 394                             m_log.warn("ignoring AttributeStatement without NameIdentifier in Subject");
 395                         continue;
 396                     }
 397                 }
 398                 extractor->extractAttributes(application, AA, *(*s), ctx.getResolvedAttributes());
 399             }
 400         }
 401
 402         AttributeFilter* filter = application.getAttributeFilter();
 403         if (filter) {
 404             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 405             Locker filtlocker(filter);
 406             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 407         }
 408     }
 409     catch (exception& ex) {
 410         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 411         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 412         ctx.getResolvedAttributes().clear();
 413     }
 414
 415     return true;
 416 }
 417
 418 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 419 {
 420 #ifdef _DEBUG
 421     xmltooling::NDC ndc("query");
 422 #endif
 423
 424     const AttributeAuthorityDescriptor* AA =
 425         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 426     if (!AA) {
 427         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 428         return false;
 429     }
 430
 431     const Application& application = ctx.getApplication();
 432     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 433     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 434     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 435
 436     // Locate policy key.
 437     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 438
 439     // Set up policy and SOAP client.
 440     auto_ptr<SecurityPolicy> policy(
 441         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 442         );
 443     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 444     MetadataCredentialCriteria mcc(*AA);
 445     shibsp::SOAPClient soaper(*policy.get());
 446
 447     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 448     saml2p::StatusResponseType* srt=nullptr;
 449     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 450     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 451         if (!XMLString::equals((*ep)->getBinding(),binding.get())  || !(*ep)->getLocation())
 452             continue;
 453         auto_ptr_char loc((*ep)->getLocation());
 454         try {
 455             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 456
 457             // Encrypt the NameID?
 458             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 459                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 460                 encrypted->encrypt(
 461                     *ctx.getNameID(),
 462                     *(application.getMetadataProvider()),
 463                     mcc,
 464                     false,
 465                     relyingParty->getXMLString("encryptionAlg").second
 466                     );
 467                 subject->setEncryptedID(encrypted.release());
 468             }
 469             else {
 470                 subject->setNameID(ctx.getNameID()->cloneNameID());
 471             }
 472
 473             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 474             query->setSubject(subject.release());
 475             Issuer* iss = IssuerBuilder::buildIssuer();
 476             iss->setName(relyingParty->getXMLString("entityID").second);
 477             query->setIssuer(iss);
 478             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 479                 query->getAttributes().push_back((*ad)->cloneAttribute());
 480
 481             SAML2SOAPClient client(soaper, false);
 482             client.sendSAML(query, application.getId(), mcc, loc.get());
 483             srt = client.receiveSAML();
 484         }
 485         catch (exception& ex) {
 486             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 487             soaper.reset();
 488         }
 489     }
 490
 491     if (!srt) {
 492         m_log.error("unable to obtain a SAML response from attribute authority");
 493         return false;
 494     }
 495
 496     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 497
 498     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 499     if (!response) {
 500         m_log.error("message was not a samlp:Response");
 501         return true;
 502     }
 503     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 504             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 505         m_log.error("attribute authority returned a SAML error");
 506         return true;
 507     }
 508
 509     saml2::Assertion* newtoken = nullptr;
 510     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 511     if (assertions.empty()) {
 512         // Check for encryption.
 513         const vector<saml2::EncryptedAssertion*>& encassertions = const_cast<const saml2p::Response*>(response)->getEncryptedAssertions();
 514         if (encassertions.empty()) {
 515             m_log.warn("response from attribute authority was empty");
 516             return true;
 517         }
 518         else if (encassertions.size() > 1) {
 519             m_log.warn("simple resolver only supports one assertion in the query response");
 520         }
 521
 522         CredentialResolver* cr=application.getCredentialResolver();
 523         if (!cr) {
 524             m_log.warn("found encrypted assertion, but no CredentialResolver was available");
 525             return true;
 526         }
 527
 528         // Attempt to decrypt it.
 529         try {
 530             Locker credlocker(cr);
 531             auto_ptr<XMLObject> tokenwrapper(encassertions.front()->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 532             newtoken = dynamic_cast<saml2::Assertion*>(tokenwrapper.get());
 533             if (newtoken) {
 534                 tokenwrapper.release();
 535                 if (m_log.isDebugEnabled())
 536                     m_log.debugStream() << "decrypted Assertion: " << *newtoken << logging::eol;
 537             }
 538         }
 539         catch (exception& ex) {
 540             m_log.error(ex.what());
 541         }
 542         if (newtoken) {
 543             // Free the Response now, so we know this is a stand-alone token later.
 544             delete wrapper.release();
 545         }
 546         else {
 547             // Nothing decrypted, should already be logged.
 548             return true;
 549         }
 550     }
 551     else {
 552         if (assertions.size() > 1)
 553             m_log.warn("simple resolver only supports one assertion in the query response");
 554         newtoken = assertions.front();
 555     }
 556
 557     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 558         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 559         if (!wrapper.get())
 560             delete newtoken;
 561         return true;
 562     }
 563
 564     try {
 565         // We're going to insist that the assertion issuer is the same as the peer.
 566         // Reset the policy's message bits and extract them from the assertion.
 567         policy->reset(true);
 568         policy->setMessageID(newtoken->getID());
 569         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 570         policy->setIssuer(newtoken->getIssuer());
 571         policy->evaluate(*newtoken);
 572
 573         // Now we can check the security status of the policy.
 574         if (!policy->isAuthenticated())
 575             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 576
 577         if (m_subjectMatch) {
 578             // Check for subject match.
 579             bool ownedName = false;
 580             NameID* respName = newtoken->getSubject() ? newtoken->getSubject()->getNameID() : nullptr;
 581             if (!respName) {
 582                 // Check for encryption.
 583                 EncryptedID* encname = newtoken->getSubject() ? newtoken->getSubject()->getEncryptedID() : nullptr;
 584                 if (encname) {
 585                     CredentialResolver* cr=application.getCredentialResolver();
 586                     if (!cr)
 587                         m_log.warn("found EncryptedID, but no CredentialResolver was available");
 588                     else {
 589                         Locker credlocker(cr);
 590                         auto_ptr<XMLObject> decryptedID(encname->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 591                         respName = dynamic_cast<NameID*>(decryptedID.get());
 592                         if (respName) {
 593                             ownedName = true;
 594                             decryptedID.release();
 595                             if (m_log.isDebugEnabled())
 596                                 m_log.debugStream() << "decrypted NameID: " << *respName << logging::eol;
 597                         }
 598                     }
 599                 }
 600             }
 601
 602             auto_ptr<NameID> nameIDwrapper(ownedName ? respName : nullptr);
 603
 604             if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 605                 !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 606                 !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier()) ||
 607                 !XMLString::equals(respName->getSPNameQualifier(), ctx.getNameID()->getSPNameQualifier())) {
 608                 if (respName)
 609                     m_log.warnStream() << "ignoring Assertion without strongly matching NameID in Subject: " <<
 610                         *respName << logging::eol;
 611                 else
 612                     m_log.warn("ignoring Assertion without NameID in Subject");
 613                 if (!wrapper.get())
 614                     delete newtoken;
 615                 return true;
 616             }
 617         }
 618     }
 619     catch (exception& ex) {
 620         m_log.error("assertion failed policy validation: %s", ex.what());
 621         if (!wrapper.get())
 622             delete newtoken;
 623         return true;
 624     }
 625
 626     if (wrapper.get()) {
 627         newtoken->detach();
 628         wrapper.release();  // detach blows away the Response
 629     }
 630     ctx.getResolvedAssertions().push_back(newtoken);
 631
 632     // Finally, extract and filter the result.
 633     try {
 634         AttributeExtractor* extractor = application.getAttributeExtractor();
 635         if (extractor) {
 636             Locker extlocker(extractor);
 637             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 638         }
 639
 640         AttributeFilter* filter = application.getAttributeFilter();
 641         if (filter) {
 642             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 643             Locker filtlocker(filter);
 644             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 645         }
 646     }
 647     catch (exception& ex) {
 648         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 649         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 650         ctx.getResolvedAttributes().clear();
 651     }
 652
 653     return true;
 654 }
 655
 656 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 657 {
 658 #ifdef _DEBUG
 659     xmltooling::NDC ndc("resolveAttributes");
 660 #endif
 661
 662     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 663     if (!qctx.doQuery()) {
 664         m_log.debug("found AttributeStatement in input to new session, skipping query");
 665         return;
 666     }
 667
 668     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 669         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 670             m_log.debug("attempting SAML 2.0 attribute query");
 671             SAML2Query(qctx);
 672         }
 673         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 674                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 675             m_log.debug("attempting SAML 1.x attribute query");
 676             SAML1Query(qctx);
 677         }
 678         else {
 679             m_log.info("SSO protocol does not allow for attribute query");
 680         }
 681     }
 682     else {
 683         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 684     }
 685 }