shibsp/attribute/resolver/impl/QueryAttributeResolver.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  * QueryAttributeResolver.cpp
  23  *
  24  * AttributeResolver based on SAML queries.
  25  */
  26
  27 #include "internal.h"
  28 #include "Application.h"
  29 #include "ServiceProvider.h"
  30 #include "SessionCache.h"
  31 #include "attribute/SimpleAttribute.h"
  32 #include "attribute/filtering/AttributeFilter.h"
  33 #include "attribute/filtering/BasicFilteringContext.h"
  34 #include "attribute/resolver/AttributeExtractor.h"
  35 #include "attribute/resolver/AttributeResolver.h"
  36 #include "attribute/resolver/ResolutionContext.h"
  37 #include "binding/SOAPClient.h"
  38 #include "metadata/MetadataProviderCriteria.h"
  39 #include "security/SecurityPolicy.h"
  40 #include "security/SecurityPolicyProvider.h"
  41 #include "util/SPConstants.h"
  42
  43 #include <saml/exceptions.h>
  44 #include <saml/saml1/binding/SAML1SOAPClient.h>
  45 #include <saml/saml1/core/Assertions.h>
  46 #include <saml/saml1/core/Protocols.h>
  47 #include <saml/saml2/binding/SAML2SOAPClient.h>
  48 #include <saml/saml2/core/Protocols.h>
  49 #include <saml/saml2/metadata/Metadata.h>
  50 #include <saml/saml2/metadata/MetadataCredentialCriteria.h>
  51 #include <saml/saml2/metadata/MetadataProvider.h>
  52 #include <xmltooling/XMLToolingConfig.h>
  53 #include <xmltooling/util/NDC.h>
  54 #include <xmltooling/util/URLEncoder.h>
  55 #include <xmltooling/util/XMLHelper.h>
  56 #include <xercesc/util/XMLUniDefs.hpp>
  57
  58 using namespace shibsp;
  59 using namespace opensaml::saml1;
  60 using namespace opensaml::saml1p;
  61 using namespace opensaml::saml2;
  62 using namespace opensaml::saml2p;
  63 using namespace opensaml::saml2md;
  64 using namespace opensaml;
  65 using namespace xmltooling;
  66 using namespace std;
  67
  68 namespace shibsp {
  69
  70     class SHIBSP_DLLLOCAL QueryContext : public ResolutionContext
  71     {
  72     public:
  73         QueryContext(const Application& application, const Session& session)
  74                 : m_query(true), m_app(application), m_session(&session), m_metadata(nullptr), m_entity(nullptr), m_nameid(nullptr) {
  75             m_protocol = XMLString::transcode(session.getProtocol());
  76             m_class = XMLString::transcode(session.getAuthnContextClassRef());
  77             m_decl = XMLString::transcode(session.getAuthnContextDeclRef());
  78         }
  79
  80         QueryContext(
  81             const Application& application,
  82             const EntityDescriptor* issuer,
  83             const XMLCh* protocol,
  84             const NameID* nameid=nullptr,
  85             const XMLCh* authncontext_class=nullptr,
  86             const XMLCh* authncontext_decl=nullptr,
  87             const vector<const opensaml::Assertion*>* tokens=nullptr
  88             ) : m_query(true), m_app(application), m_session(nullptr), m_metadata(nullptr), m_entity(issuer),
  89                 m_protocol(protocol), m_nameid(nameid), m_class(authncontext_class), m_decl(authncontext_decl) {
  90
  91             if (tokens) {
  92                 for (vector<const opensaml::Assertion*>::const_iterator t = tokens->begin(); t!=tokens->end(); ++t) {
  93                     const saml2::Assertion* token2 = dynamic_cast<const saml2::Assertion*>(*t);
  94                     if (token2 && !token2->getAttributeStatements().empty()) {
  95                         m_query = false;
  96                     }
  97                     else {
  98                         const saml1::Assertion* token1 = dynamic_cast<const saml1::Assertion*>(*t);
  99                         if (token1 && !token1->getAttributeStatements().empty()) {
 100                             m_query = false;
 101                         }
 102                     }
 103                 }
 104             }
 105         }
 106
 107         ~QueryContext() {
 108             if (m_session) {
 109                 XMLString::release((XMLCh**)&m_protocol);
 110                 XMLString::release((XMLCh**)&m_class);
 111                 XMLString::release((XMLCh**)&m_decl);
 112             }
 113             if (m_metadata)
 114                 m_metadata->unlock();
 115             for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 116             for_each(m_assertions.begin(), m_assertions.end(), xmltooling::cleanup<opensaml::Assertion>());
 117         }
 118
 119         bool doQuery() const {
 120             return m_query;
 121         }
 122
 123         const Application& getApplication() const {
 124             return m_app;
 125         }
 126         const EntityDescriptor* getEntityDescriptor() const {
 127             if (m_entity)
 128                 return m_entity;
 129             if (m_session && m_session->getEntityID()) {
 130                 m_metadata = m_app.getMetadataProvider(false);
 131                 if (m_metadata) {
 132                     m_metadata->lock();
 133                     return m_entity = m_metadata->getEntityDescriptor(MetadataProviderCriteria(m_app, m_session->getEntityID())).first;
 134                 }
 135             }
 136             return nullptr;
 137         }
 138         const XMLCh* getProtocol() const {
 139             return m_protocol;
 140         }
 141         const NameID* getNameID() const {
 142             return m_session ? m_session->getNameID() : m_nameid;
 143         }
 144         const XMLCh* getClassRef() const {
 145             return m_class;
 146         }
 147         const XMLCh* getDeclRef() const {
 148             return m_decl;
 149         }
 150         const Session* getSession() const {
 151             return m_session;
 152         }
 153         vector<shibsp::Attribute*>& getResolvedAttributes() {
 154             return m_attributes;
 155         }
 156         vector<opensaml::Assertion*>& getResolvedAssertions() {
 157             return m_assertions;
 158         }
 159
 160     private:
 161         bool m_query;
 162         const Application& m_app;
 163         const Session* m_session;
 164         mutable MetadataProvider* m_metadata;
 165         mutable const EntityDescriptor* m_entity;
 166         const XMLCh* m_protocol;
 167         const NameID* m_nameid;
 168         const XMLCh* m_class;
 169         const XMLCh* m_decl;
 170         vector<shibsp::Attribute*> m_attributes;
 171         vector<opensaml::Assertion*> m_assertions;
 172     };
 173
 174     class SHIBSP_DLLLOCAL QueryResolver : public AttributeResolver
 175     {
 176     public:
 177         QueryResolver(const DOMElement* e);
 178         ~QueryResolver() {
 179             for_each(m_SAML1Designators.begin(), m_SAML1Designators.end(), xmltooling::cleanup<AttributeDesignator>());
 180             for_each(m_SAML2Designators.begin(), m_SAML2Designators.end(), xmltooling::cleanup<saml2::Attribute>());
 181         }
 182
 183         Lockable* lock() {return this;}
 184         void unlock() {}
 185
 186         ResolutionContext* createResolutionContext(
 187             const Application& application,
 188             const EntityDescriptor* issuer,
 189             const XMLCh* protocol,
 190             const NameID* nameid=nullptr,
 191             const XMLCh* authncontext_class=nullptr,
 192             const XMLCh* authncontext_decl=nullptr,
 193             const vector<const opensaml::Assertion*>* tokens=nullptr,
 194             const vector<shibsp::Attribute*>* attributes=nullptr
 195             ) const {
 196             return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens);
 197         }
 198
 199         ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
 200             return new QueryContext(application,session);
 201         }
 202
 203         void resolveAttributes(ResolutionContext& ctx) const;
 204
 205         void getAttributeIds(vector<string>& attributes) const {
 206             // Nothing to do, only the extractor would actually generate them.
 207         }
 208
 209     private:
 210         void SAML1Query(QueryContext& ctx) const;
 211         void SAML2Query(QueryContext& ctx) const;
 212
 213         Category& m_log;
 214         string m_policyId;
 215         bool m_subjectMatch;
 216         vector<AttributeDesignator*> m_SAML1Designators;
 217         vector<saml2::Attribute*> m_SAML2Designators;
 218         vector<string> m_exceptionId;
 219     };
 220
 221     AttributeResolver* SHIBSP_DLLLOCAL QueryResolverFactory(const DOMElement* const & e)
 222     {
 223         return new QueryResolver(e);
 224     }
 225
 226     static const XMLCh exceptionId[] =  UNICODE_LITERAL_11(e,x,c,e,p,t,i,o,n,I,d);
 227     static const XMLCh policyId[] =     UNICODE_LITERAL_8(p,o,l,i,c,y,I,d);
 228     static const XMLCh subjectMatch[] = UNICODE_LITERAL_12(s,u,b,j,e,c,t,M,a,t,c,h);
 229 };
 230
 231 QueryResolver::QueryResolver(const DOMElement* e)
 232     : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver.Query")),
 233         m_policyId(XMLHelper::getAttrString(e, nullptr, policyId)),
 234         m_subjectMatch(XMLHelper::getAttrBool(e, false, subjectMatch))
 235 {
 236 #ifdef _DEBUG
 237     xmltooling::NDC ndc("QueryResolver");
 238 #endif
 239
 240     DOMElement* child = XMLHelper::getFirstChildElement(e);
 241     while (child) {
 242         try {
 243             if (XMLHelper::isNodeNamed(child, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 244                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 245                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 246                 if (down) {
 247                     m_SAML2Designators.push_back(down);
 248                     obj.release();
 249                 }
 250             }
 251             else if (XMLHelper::isNodeNamed(child, samlconstants::SAML1_NS, AttributeDesignator::LOCAL_NAME)) {
 252                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 253                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 254                 if (down) {
 255                     m_SAML1Designators.push_back(down);
 256                     obj.release();
 257                 }
 258             }
 259         }
 260         catch (exception& ex) {
 261             m_log.error("exception loading attribute designator: %s", ex.what());
 262         }
 263         child = XMLHelper::getNextSiblingElement(child);
 264     }
 265
 266     string exid(XMLHelper::getAttrString(e, nullptr, exceptionId));
 267     if (!exid.empty())
 268         m_exceptionId.push_back(exid);
 269 }
 270
 271 void QueryResolver::SAML1Query(QueryContext& ctx) const
 272 {
 273 #ifdef _DEBUG
 274     xmltooling::NDC ndc("query");
 275 #endif
 276
 277     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 278     const AttributeAuthorityDescriptor* AA =
 279         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 280     if (!AA) {
 281         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 282         return;
 283     }
 284
 285     const Application& application = ctx.getApplication();
 286     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 287
 288     // Locate policy key.
 289     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 290
 291     // Set up policy and SOAP client.
 292     auto_ptr<SecurityPolicy> policy(
 293         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 294         );
 295     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 296     MetadataCredentialCriteria mcc(*AA);
 297     shibsp::SOAPClient soaper(*policy.get());
 298
 299     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 300     saml1p::Response* response=nullptr;
 301     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 302     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 303         if (!XMLString::equals((*ep)->getBinding(),binding.get()) || !(*ep)->getLocation())
 304             continue;
 305         auto_ptr_char loc((*ep)->getLocation());
 306         try {
 307             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 308             nameid->setName(ctx.getNameID()->getName());
 309             nameid->setFormat(ctx.getNameID()->getFormat());
 310             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 311             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 312             subject->setNameIdentifier(nameid);
 313             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 314             query->setSubject(subject);
 315             query->setResource(relyingParty->getXMLString("entityID").second);
 316             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 317                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 318             Request* request = RequestBuilder::buildRequest();
 319             request->setAttributeQuery(query);
 320             request->setMinorVersion(version);
 321
 322             SAML1SOAPClient client(soaper, false);
 323             client.sendSAML(request, application.getId(), mcc, loc.get());
 324             response = client.receiveSAML();
 325         }
 326         catch (exception& ex) {
 327             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 328             soaper.reset();
 329         }
 330     }
 331
 332     if (!response) {
 333         m_log.error("unable to obtain a SAML response from attribute authority");
 334         throw BindingException("Unable to obtain a SAML response from attribute authority.");
 335     }
 336     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==nullptr ||
 337             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 338         delete response;
 339         m_log.error("attribute authority returned a SAML error");
 340         throw FatalProfileException("Attribute authority returned a SAML error.");
 341     }
 342
 343     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 344     if (assertions.empty()) {
 345         delete response;
 346         m_log.warn("response from attribute authority was empty");
 347         return;
 348     }
 349     else if (assertions.size()>1) {
 350         m_log.warn("simple resolver only supports one assertion in the query response");
 351     }
 352
 353     auto_ptr<saml1p::Response> wrapper(response);
 354     saml1::Assertion* newtoken = assertions.front();
 355
 356     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 357     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 358         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 359         throw SecurityPolicyException("Rejected unsigned assertion based on local policy.");
 360     }
 361
 362     try {
 363         // We're going to insist that the assertion issuer is the same as the peer.
 364         // Reset the policy's message bits and extract them from the assertion.
 365         policy->reset(true);
 366         policy->setMessageID(newtoken->getAssertionID());
 367         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 368         policy->setIssuer(newtoken->getIssuer());
 369         policy->evaluate(*newtoken);
 370
 371         // Now we can check the security status of the policy.
 372         if (!policy->isAuthenticated())
 373             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 374     }
 375     catch (exception& ex) {
 376         m_log.error("assertion failed policy validation: %s", ex.what());
 377         throw;
 378     }
 379
 380     newtoken->detach();
 381     wrapper.release();  // detach blows away the Response
 382     ctx.getResolvedAssertions().push_back(newtoken);
 383
 384     // Finally, extract and filter the result.
 385     try {
 386         AttributeExtractor* extractor = application.getAttributeExtractor();
 387         if (extractor) {
 388             Locker extlocker(extractor);
 389             const vector<saml1::AttributeStatement*>& statements = const_cast<const saml1::Assertion*>(newtoken)->getAttributeStatements();
 390             for (vector<saml1::AttributeStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
 391                 if (m_subjectMatch) {
 392                     // Check for subject match.
 393                     const NameIdentifier* respName = (*s)->getSubject() ? (*s)->getSubject()->getNameIdentifier() : nullptr;
 394                     if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 395                         !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 396                         !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier())) {
 397                         if (respName)
 398                             m_log.warnStream() << "ignoring AttributeStatement without strongly matching NameIdentifier in Subject: " <<
 399                                 *respName << logging::eol;
 400                         else
 401                             m_log.warn("ignoring AttributeStatement without NameIdentifier in Subject");
 402                         continue;
 403                     }
 404                 }
 405                 extractor->extractAttributes(application, AA, *(*s), ctx.getResolvedAttributes());
 406             }
 407         }
 408
 409         AttributeFilter* filter = application.getAttributeFilter();
 410         if (filter) {
 411             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 412             Locker filtlocker(filter);
 413             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 414         }
 415     }
 416     catch (exception& ex) {
 417         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 418         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 419         ctx.getResolvedAttributes().clear();
 420         throw;
 421     }
 422 }
 423
 424 void QueryResolver::SAML2Query(QueryContext& ctx) const
 425 {
 426 #ifdef _DEBUG
 427     xmltooling::NDC ndc("query");
 428 #endif
 429
 430     const AttributeAuthorityDescriptor* AA =
 431         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 432     if (!AA) {
 433         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 434         return;
 435     }
 436
 437     const Application& application = ctx.getApplication();
 438     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 439     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 440     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 441
 442     // Locate policy key.
 443     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 444
 445     // Set up policy and SOAP client.
 446     auto_ptr<SecurityPolicy> policy(
 447         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 448         );
 449     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 450     MetadataCredentialCriteria mcc(*AA);
 451     shibsp::SOAPClient soaper(*policy.get());
 452
 453     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 454     saml2p::StatusResponseType* srt=nullptr;
 455     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 456     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 457         if (!XMLString::equals((*ep)->getBinding(),binding.get())  || !(*ep)->getLocation())
 458             continue;
 459         auto_ptr_char loc((*ep)->getLocation());
 460         try {
 461             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 462
 463             // Encrypt the NameID?
 464             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 465                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 466                 encrypted->encrypt(
 467                     *ctx.getNameID(),
 468                     *(application.getMetadataProvider()),
 469                     mcc,
 470                     false,
 471                     relyingParty->getXMLString("encryptionAlg").second
 472                     );
 473                 subject->setEncryptedID(encrypted.release());
 474             }
 475             else {
 476                 subject->setNameID(ctx.getNameID()->cloneNameID());
 477             }
 478
 479             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 480             query->setSubject(subject.release());
 481             Issuer* iss = IssuerBuilder::buildIssuer();
 482             iss->setName(relyingParty->getXMLString("entityID").second);
 483             query->setIssuer(iss);
 484             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 485                 query->getAttributes().push_back((*ad)->cloneAttribute());
 486
 487             SAML2SOAPClient client(soaper, false);
 488             client.sendSAML(query, application.getId(), mcc, loc.get());
 489             srt = client.receiveSAML();
 490         }
 491         catch (exception& ex) {
 492             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 493             soaper.reset();
 494         }
 495     }
 496
 497     if (!srt) {
 498         m_log.error("unable to obtain a SAML response from attribute authority");
 499         throw BindingException("Unable to obtain a SAML response from attribute authority.");
 500     }
 501
 502     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 503
 504     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 505     if (!response) {
 506         m_log.error("message was not a samlp:Response");
 507         throw FatalProfileException("Attribute authority returned an unrecognized message.");
 508     }
 509     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 510             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 511         m_log.error("attribute authority returned a SAML error");
 512         throw FatalProfileException("Attribute authority returned a SAML error.");
 513     }
 514
 515     saml2::Assertion* newtoken = nullptr;
 516     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 517     if (assertions.empty()) {
 518         // Check for encryption.
 519         const vector<saml2::EncryptedAssertion*>& encassertions = const_cast<const saml2p::Response*>(response)->getEncryptedAssertions();
 520         if (encassertions.empty()) {
 521             m_log.warn("response from attribute authority was empty");
 522             return;
 523         }
 524         else if (encassertions.size() > 1) {
 525             m_log.warn("simple resolver only supports one assertion in the query response");
 526         }
 527
 528         CredentialResolver* cr=application.getCredentialResolver();
 529         if (!cr) {
 530             m_log.warn("found encrypted assertion, but no CredentialResolver was available");
 531             throw FatalProfileException("Assertion was encrypted, but no decryption credentials are available.");
 532         }
 533
 534         // Attempt to decrypt it.
 535         try {
 536             Locker credlocker(cr);
 537             auto_ptr<XMLObject> tokenwrapper(encassertions.front()->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 538             newtoken = dynamic_cast<saml2::Assertion*>(tokenwrapper.get());
 539             if (newtoken) {
 540                 tokenwrapper.release();
 541                 if (m_log.isDebugEnabled())
 542                     m_log.debugStream() << "decrypted Assertion: " << *newtoken << logging::eol;
 543                 // Free the Response now, so we know this is a stand-alone token later.
 544                 delete wrapper.release();
 545             }
 546         }
 547         catch (exception& ex) {
 548             m_log.error(ex.what());
 549             throw;
 550         }
 551     }
 552     else {
 553         if (assertions.size() > 1)
 554             m_log.warn("simple resolver only supports one assertion in the query response");
 555         newtoken = assertions.front();
 556     }
 557
 558     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 559         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 560         if (!wrapper.get())
 561             delete newtoken;
 562         throw SecurityPolicyException("Rejected unsigned assertion based on local policy.");
 563     }
 564
 565     try {
 566         // We're going to insist that the assertion issuer is the same as the peer.
 567         // Reset the policy's message bits and extract them from the assertion.
 568         policy->reset(true);
 569         policy->setMessageID(newtoken->getID());
 570         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 571         policy->setIssuer(newtoken->getIssuer());
 572         policy->evaluate(*newtoken);
 573
 574         // Now we can check the security status of the policy.
 575         if (!policy->isAuthenticated())
 576             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 577
 578         if (m_subjectMatch) {
 579             // Check for subject match.
 580             bool ownedName = false;
 581             NameID* respName = newtoken->getSubject() ? newtoken->getSubject()->getNameID() : nullptr;
 582             if (!respName) {
 583                 // Check for encryption.
 584                 EncryptedID* encname = newtoken->getSubject() ? newtoken->getSubject()->getEncryptedID() : nullptr;
 585                 if (encname) {
 586                     CredentialResolver* cr=application.getCredentialResolver();
 587                     if (!cr)
 588                         m_log.warn("found EncryptedID, but no CredentialResolver was available");
 589                     else {
 590                         Locker credlocker(cr);
 591                         auto_ptr<XMLObject> decryptedID(encname->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 592                         respName = dynamic_cast<NameID*>(decryptedID.get());
 593                         if (respName) {
 594                             ownedName = true;
 595                             decryptedID.release();
 596                             if (m_log.isDebugEnabled())
 597                                 m_log.debugStream() << "decrypted NameID: " << *respName << logging::eol;
 598                         }
 599                     }
 600                 }
 601             }
 602
 603             auto_ptr<NameID> nameIDwrapper(ownedName ? respName : nullptr);
 604
 605             if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 606                 !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 607                 !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier()) ||
 608                 !XMLString::equals(respName->getSPNameQualifier(), ctx.getNameID()->getSPNameQualifier())) {
 609                 if (respName)
 610                     m_log.warnStream() << "ignoring Assertion without strongly matching NameID in Subject: " <<
 611                         *respName << logging::eol;
 612                 else
 613                     m_log.warn("ignoring Assertion without NameID in Subject");
 614                 if (!wrapper.get())
 615                     delete newtoken;
 616                 return;
 617             }
 618         }
 619     }
 620     catch (exception& ex) {
 621         m_log.error("assertion failed policy validation: %s", ex.what());
 622         if (!wrapper.get())
 623             delete newtoken;
 624         throw;
 625     }
 626
 627     if (wrapper.get()) {
 628         newtoken->detach();
 629         wrapper.release();  // detach blows away the Response
 630     }
 631     ctx.getResolvedAssertions().push_back(newtoken);
 632
 633     // Finally, extract and filter the result.
 634     try {
 635         AttributeExtractor* extractor = application.getAttributeExtractor();
 636         if (extractor) {
 637             Locker extlocker(extractor);
 638             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 639         }
 640
 641         AttributeFilter* filter = application.getAttributeFilter();
 642         if (filter) {
 643             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 644             Locker filtlocker(filter);
 645             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 646         }
 647     }
 648     catch (exception& ex) {
 649         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 650         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 651         ctx.getResolvedAttributes().clear();
 652         throw;
 653     }
 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     try {
 669         if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 670             if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 671                 m_log.debug("attempting SAML 2.0 attribute query");
 672                 SAML2Query(qctx);
 673             }
 674             else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 675                     XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 676                 m_log.debug("attempting SAML 1.x attribute query");
 677                 SAML1Query(qctx);
 678             }
 679             else {
 680                 m_log.info("SSO protocol does not allow for attribute query");
 681             }
 682         }
 683         else {
 684             m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 685         }
 686     }
 687     catch (exception& ex) {
 688         // Already logged.
 689         if (!m_exceptionId.empty()) {
 690             SimpleAttribute* attr = new SimpleAttribute(m_exceptionId);
 691             attr->getValues().push_back(XMLToolingConfig::getConfig().getURLEncoder()->encode(ex.what()));
 692             qctx.getResolvedAttributes().push_back(attr);
 693         }
 694     }
 695 }