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)
 224     : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver.Query")),
 225         m_policyId(XMLHelper::getAttrString(e, nullptr, policyId)),
 226         m_subjectMatch(XMLHelper::getAttrBool(e, false, subjectMatch))
 227 {
 228 #ifdef _DEBUG
 229     xmltooling::NDC ndc("QueryResolver");
 230 #endif
 231
 232     DOMElement* child = XMLHelper::getFirstChildElement(e);
 233     while (child) {
 234         try {
 235             if (XMLHelper::isNodeNamed(child, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 236                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 237                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 238                 if (down) {
 239                     m_SAML2Designators.push_back(down);
 240                     obj.release();
 241                 }
 242             }
 243             else if (XMLHelper::isNodeNamed(child, samlconstants::SAML1_NS, AttributeDesignator::LOCAL_NAME)) {
 244                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 245                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 246                 if (down) {
 247                     m_SAML1Designators.push_back(down);
 248                     obj.release();
 249                 }
 250             }
 251         }
 252         catch (exception& ex) {
 253             m_log.error("exception loading attribute designator: %s", ex.what());
 254         }
 255         child = XMLHelper::getNextSiblingElement(child);
 256     }
 257 }
 258
 259 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 260 {
 261 #ifdef _DEBUG
 262     xmltooling::NDC ndc("query");
 263 #endif
 264
 265     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 266     const AttributeAuthorityDescriptor* AA =
 267         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 268     if (!AA) {
 269         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 270         return false;
 271     }
 272
 273     const Application& application = ctx.getApplication();
 274     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 275
 276     // Locate policy key.
 277     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 278
 279     // Set up policy and SOAP client.
 280     auto_ptr<SecurityPolicy> policy(
 281         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 282         );
 283     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 284     MetadataCredentialCriteria mcc(*AA);
 285     shibsp::SOAPClient soaper(*policy.get());
 286
 287     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 288     saml1p::Response* response=nullptr;
 289     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 290     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 291         if (!XMLString::equals((*ep)->getBinding(),binding.get()) || !(*ep)->getLocation())
 292             continue;
 293         auto_ptr_char loc((*ep)->getLocation());
 294         try {
 295             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 296             nameid->setName(ctx.getNameID()->getName());
 297             nameid->setFormat(ctx.getNameID()->getFormat());
 298             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 299             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 300             subject->setNameIdentifier(nameid);
 301             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 302             query->setSubject(subject);
 303             query->setResource(relyingParty->getXMLString("entityID").second);
 304             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 305                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 306             Request* request = RequestBuilder::buildRequest();
 307             request->setAttributeQuery(query);
 308             request->setMinorVersion(version);
 309
 310             SAML1SOAPClient client(soaper, false);
 311             client.sendSAML(request, application.getId(), mcc, loc.get());
 312             response = client.receiveSAML();
 313         }
 314         catch (exception& ex) {
 315             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 316             soaper.reset();
 317         }
 318     }
 319
 320     if (!response) {
 321         m_log.error("unable to obtain a SAML response from attribute authority");
 322         return false;
 323     }
 324     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==nullptr ||
 325             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 326         delete response;
 327         m_log.error("attribute authority returned a SAML error");
 328         return true;
 329     }
 330
 331     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 332     if (assertions.empty()) {
 333         delete response;
 334         m_log.warn("response from attribute authority was empty");
 335         return true;
 336     }
 337     else if (assertions.size()>1)
 338         m_log.warn("simple resolver only supports one assertion in the query response");
 339
 340     auto_ptr<saml1p::Response> wrapper(response);
 341     saml1::Assertion* newtoken = assertions.front();
 342
 343     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 344     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 345         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 346         return true;
 347     }
 348
 349     try {
 350         // We're going to insist that the assertion issuer is the same as the peer.
 351         // Reset the policy's message bits and extract them from the assertion.
 352         policy->reset(true);
 353         policy->setMessageID(newtoken->getAssertionID());
 354         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 355         policy->setIssuer(newtoken->getIssuer());
 356         policy->evaluate(*newtoken);
 357
 358         // Now we can check the security status of the policy.
 359         if (!policy->isAuthenticated())
 360             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 361     }
 362     catch (exception& ex) {
 363         m_log.error("assertion failed policy validation: %s", ex.what());
 364         return true;
 365     }
 366
 367     newtoken->detach();
 368     wrapper.release();  // detach blows away the Response
 369     ctx.getResolvedAssertions().push_back(newtoken);
 370
 371     // Finally, extract and filter the result.
 372     try {
 373         AttributeExtractor* extractor = application.getAttributeExtractor();
 374         if (extractor) {
 375             Locker extlocker(extractor);
 376             const vector<saml1::AttributeStatement*>& statements = const_cast<const saml1::Assertion*>(newtoken)->getAttributeStatements();
 377             for (vector<saml1::AttributeStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
 378                 if (m_subjectMatch) {
 379                     // Check for subject match.
 380                     const NameIdentifier* respName = (*s)->getSubject() ? (*s)->getSubject()->getNameIdentifier() : nullptr;
 381                     if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 382                         !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 383                         !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier())) {
 384                         if (respName)
 385                             m_log.warnStream() << "ignoring AttributeStatement without strongly matching NameIdentifier in Subject: " <<
 386                                 *respName << logging::eol;
 387                         else
 388                             m_log.warn("ignoring AttributeStatement without NameIdentifier in Subject");
 389                         continue;
 390                     }
 391                 }
 392                 extractor->extractAttributes(application, AA, *(*s), ctx.getResolvedAttributes());
 393             }
 394         }
 395
 396         AttributeFilter* filter = application.getAttributeFilter();
 397         if (filter) {
 398             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 399             Locker filtlocker(filter);
 400             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 401         }
 402     }
 403     catch (exception& ex) {
 404         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 405         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 406         ctx.getResolvedAttributes().clear();
 407     }
 408
 409     return true;
 410 }
 411
 412 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 413 {
 414 #ifdef _DEBUG
 415     xmltooling::NDC ndc("query");
 416 #endif
 417
 418     const AttributeAuthorityDescriptor* AA =
 419         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 420     if (!AA) {
 421         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 422         return false;
 423     }
 424
 425     const Application& application = ctx.getApplication();
 426     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 427     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 428     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 429
 430     // Locate policy key.
 431     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 432
 433     // Set up policy and SOAP client.
 434     auto_ptr<SecurityPolicy> policy(
 435         application.getServiceProvider().getSecurityPolicyProvider()->createSecurityPolicy(application, nullptr, policyId)
 436         );
 437     policy->getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 438     MetadataCredentialCriteria mcc(*AA);
 439     shibsp::SOAPClient soaper(*policy.get());
 440
 441     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 442     saml2p::StatusResponseType* srt=nullptr;
 443     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 444     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 445         if (!XMLString::equals((*ep)->getBinding(),binding.get())  || !(*ep)->getLocation())
 446             continue;
 447         auto_ptr_char loc((*ep)->getLocation());
 448         try {
 449             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 450
 451             // Encrypt the NameID?
 452             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 453                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 454                 encrypted->encrypt(
 455                     *ctx.getNameID(),
 456                     *(application.getMetadataProvider()),
 457                     mcc,
 458                     false,
 459                     relyingParty->getXMLString("encryptionAlg").second
 460                     );
 461                 subject->setEncryptedID(encrypted.release());
 462             }
 463             else {
 464                 subject->setNameID(ctx.getNameID()->cloneNameID());
 465             }
 466
 467             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 468             query->setSubject(subject.release());
 469             Issuer* iss = IssuerBuilder::buildIssuer();
 470             iss->setName(relyingParty->getXMLString("entityID").second);
 471             query->setIssuer(iss);
 472             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 473                 query->getAttributes().push_back((*ad)->cloneAttribute());
 474
 475             SAML2SOAPClient client(soaper, false);
 476             client.sendSAML(query, application.getId(), mcc, loc.get());
 477             srt = client.receiveSAML();
 478         }
 479         catch (exception& ex) {
 480             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 481             soaper.reset();
 482         }
 483     }
 484
 485     if (!srt) {
 486         m_log.error("unable to obtain a SAML response from attribute authority");
 487         return false;
 488     }
 489
 490     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 491
 492     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 493     if (!response) {
 494         m_log.error("message was not a samlp:Response");
 495         return true;
 496     }
 497     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 498             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 499         m_log.error("attribute authority returned a SAML error");
 500         return true;
 501     }
 502
 503     saml2::Assertion* newtoken = nullptr;
 504     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 505     if (assertions.empty()) {
 506         // Check for encryption.
 507         const vector<saml2::EncryptedAssertion*>& encassertions = const_cast<const saml2p::Response*>(response)->getEncryptedAssertions();
 508         if (encassertions.empty()) {
 509             m_log.warn("response from attribute authority was empty");
 510             return true;
 511         }
 512         else if (encassertions.size() > 1) {
 513             m_log.warn("simple resolver only supports one assertion in the query response");
 514         }
 515
 516         CredentialResolver* cr=application.getCredentialResolver();
 517         if (!cr) {
 518             m_log.warn("found encrypted assertion, but no CredentialResolver was available");
 519             return true;
 520         }
 521
 522         // Attempt to decrypt it.
 523         try {
 524             Locker credlocker(cr);
 525             auto_ptr<XMLObject> tokenwrapper(encassertions.front()->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 526             newtoken = dynamic_cast<saml2::Assertion*>(tokenwrapper.get());
 527             if (newtoken) {
 528                 tokenwrapper.release();
 529                 if (m_log.isDebugEnabled())
 530                     m_log.debugStream() << "decrypted Assertion: " << *newtoken << logging::eol;
 531             }
 532         }
 533         catch (exception& ex) {
 534             m_log.error(ex.what());
 535         }
 536         if (newtoken) {
 537             // Free the Response now, so we know this is a stand-alone token later.
 538             delete wrapper.release();
 539         }
 540         else {
 541             // Nothing decrypted, should already be logged.
 542             return true;
 543         }
 544     }
 545     else {
 546         if (assertions.size() > 1)
 547             m_log.warn("simple resolver only supports one assertion in the query response");
 548         newtoken = assertions.front();
 549     }
 550
 551     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 552         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 553         if (!wrapper.get())
 554             delete newtoken;
 555         return true;
 556     }
 557
 558     try {
 559         // We're going to insist that the assertion issuer is the same as the peer.
 560         // Reset the policy's message bits and extract them from the assertion.
 561         policy->reset(true);
 562         policy->setMessageID(newtoken->getID());
 563         policy->setIssueInstant(newtoken->getIssueInstantEpoch());
 564         policy->setIssuer(newtoken->getIssuer());
 565         policy->evaluate(*newtoken);
 566
 567         // Now we can check the security status of the policy.
 568         if (!policy->isAuthenticated())
 569             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 570
 571         if (m_subjectMatch) {
 572             // Check for subject match.
 573             bool ownedName = false;
 574             NameID* respName = newtoken->getSubject() ? newtoken->getSubject()->getNameID() : nullptr;
 575             if (!respName) {
 576                 // Check for encryption.
 577                 EncryptedID* encname = newtoken->getSubject() ? newtoken->getSubject()->getEncryptedID() : nullptr;
 578                 if (encname) {
 579                     CredentialResolver* cr=application.getCredentialResolver();
 580                     if (!cr)
 581                         m_log.warn("found EncryptedID, but no CredentialResolver was available");
 582                     else {
 583                         Locker credlocker(cr);
 584                         auto_ptr<XMLObject> decryptedID(encname->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 585                         respName = dynamic_cast<NameID*>(decryptedID.get());
 586                         if (respName) {
 587                             ownedName = true;
 588                             decryptedID.release();
 589                             if (m_log.isDebugEnabled())
 590                                 m_log.debugStream() << "decrypted NameID: " << *respName << logging::eol;
 591                         }
 592                     }
 593                 }
 594             }
 595
 596             auto_ptr<NameID> nameIDwrapper(ownedName ? respName : nullptr);
 597
 598             if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 599                 !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 600                 !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier()) ||
 601                 !XMLString::equals(respName->getSPNameQualifier(), ctx.getNameID()->getSPNameQualifier())) {
 602                 if (respName)
 603                     m_log.warnStream() << "ignoring Assertion without strongly matching NameID in Subject: " <<
 604                         *respName << logging::eol;
 605                 else
 606                     m_log.warn("ignoring Assertion without NameID in Subject");
 607                 if (!wrapper.get())
 608                     delete newtoken;
 609                 return true;
 610             }
 611         }
 612     }
 613     catch (exception& ex) {
 614         m_log.error("assertion failed policy validation: %s", ex.what());
 615         if (!wrapper.get())
 616             delete newtoken;
 617         return true;
 618     }
 619
 620     if (wrapper.get()) {
 621         newtoken->detach();
 622         wrapper.release();  // detach blows away the Response
 623     }
 624     ctx.getResolvedAssertions().push_back(newtoken);
 625
 626     // Finally, extract and filter the result.
 627     try {
 628         AttributeExtractor* extractor = application.getAttributeExtractor();
 629         if (extractor) {
 630             Locker extlocker(extractor);
 631             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 632         }
 633
 634         AttributeFilter* filter = application.getAttributeFilter();
 635         if (filter) {
 636             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 637             Locker filtlocker(filter);
 638             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 639         }
 640     }
 641     catch (exception& ex) {
 642         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 643         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 644         ctx.getResolvedAttributes().clear();
 645     }
 646
 647     return true;
 648 }
 649
 650 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 651 {
 652 #ifdef _DEBUG
 653     xmltooling::NDC ndc("resolveAttributes");
 654 #endif
 655
 656     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 657     if (!qctx.doQuery()) {
 658         m_log.debug("found AttributeStatement in input to new session, skipping query");
 659         return;
 660     }
 661
 662     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 663         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 664             m_log.debug("attempting SAML 2.0 attribute query");
 665             SAML2Query(qctx);
 666         }
 667         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 668                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 669             m_log.debug("attempting SAML 1.x attribute query");
 670             SAML1Query(qctx);
 671         }
 672         else {
 673             m_log.info("SSO protocol does not allow for attribute query");
 674         }
 675     }
 676     else {
 677         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 678     }
 679 }