shibsp/attribute/resolver/impl/QueryAttributeResolver.cpp

   1 /*
   2  *  Copyright 2001-2007 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 "util/SPConstants.h"
  35
  36 #include <saml/exceptions.h>
  37 #include <saml/binding/SecurityPolicy.h>
  38 #include <saml/saml1/binding/SAML1SOAPClient.h>
  39 #include <saml/saml1/core/Assertions.h>
  40 #include <saml/saml1/core/Protocols.h>
  41 #include <saml/saml1/profile/AssertionValidator.h>
  42 #include <saml/saml2/binding/SAML2SOAPClient.h>
  43 #include <saml/saml2/core/Protocols.h>
  44 #include <saml/saml2/metadata/Metadata.h>
  45 #include <saml/saml2/metadata/MetadataProvider.h>
  46 #include <saml/saml2/profile/AssertionValidator.h>
  47 #include <xmltooling/util/NDC.h>
  48 #include <xmltooling/util/XMLHelper.h>
  49 #include <xercesc/util/XMLUniDefs.hpp>
  50
  51 using namespace shibsp;
  52 using namespace opensaml::saml1;
  53 using namespace opensaml::saml1p;
  54 using namespace opensaml::saml2;
  55 using namespace opensaml::saml2p;
  56 using namespace opensaml::saml2md;
  57 using namespace opensaml;
  58 using namespace xmltooling;
  59 using namespace std;
  60
  61 namespace shibsp {
  62
  63     class SHIBSP_DLLLOCAL QueryContext : public ResolutionContext
  64     {
  65     public:
  66         QueryContext(const Application& application, const Session& session)
  67                 : m_query(true), m_app(application), m_session(&session), m_metadata(NULL), m_entity(NULL), m_nameid(NULL) {
  68             m_protocol = XMLString::transcode(session.getProtocol());
  69             m_class = XMLString::transcode(session.getAuthnContextClassRef());
  70             m_decl = XMLString::transcode(session.getAuthnContextDeclRef());
  71         }
  72
  73         QueryContext(
  74             const Application& application,
  75             const EntityDescriptor* issuer,
  76             const XMLCh* protocol,
  77             const NameID* nameid,
  78             const XMLCh* authncontext_class=NULL,
  79             const XMLCh* authncontext_decl=NULL,
  80             const vector<const opensaml::Assertion*>* tokens=NULL,
  81             const vector<Attribute*>* attributes=NULL
  82             ) : m_query(true), m_app(application), m_session(NULL), m_metadata(NULL), 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();
 125                 if (m_metadata) {
 126                     m_metadata->lock();
 127                     return m_entity = m_metadata->getEntityDescriptor(m_session->getEntityID());
 128                 }
 129             }
 130             return NULL;
 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,
 185             const XMLCh* authncontext_class=NULL,
 186             const XMLCh* authncontext_decl=NULL,
 187             const vector<const opensaml::Assertion*>* tokens=NULL,
 188             const vector<shibsp::Attribute*>* attributes=NULL
 189             ) const {
 190             return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens,attributes);
 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         void signMessage(const Application& app, const RoleDescriptor& role, SignableObject& msg) const;
 207
 208         Category& m_log;
 209         vector<AttributeDesignator*> m_SAML1Designators;
 210         vector<saml2::Attribute*> m_SAML2Designators;
 211     };
 212
 213     AttributeResolver* SHIBSP_DLLLOCAL QueryResolverFactory(const DOMElement* const & e)
 214     {
 215         return new QueryResolver(e);
 216     }
 217
 218 };
 219
 220 void SHIBSP_API shibsp::registerAttributeResolvers()
 221 {
 222     SPConfig::getConfig().AttributeResolverManager.registerFactory(QUERY_ATTRIBUTE_RESOLVER, QueryResolverFactory);
 223 }
 224
 225 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver"))
 226 {
 227 #ifdef _DEBUG
 228     xmltooling::NDC ndc("QueryResolver");
 229 #endif
 230
 231     DOMElement* child = XMLHelper::getFirstChildElement(e);
 232     while (child) {
 233         try {
 234             if (XMLHelper::isNodeNamed(e, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 235                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 236                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 237                 if (down) {
 238                     m_SAML2Designators.push_back(down);
 239                     obj.release();
 240                 }
 241             }
 242             else if (XMLHelper::isNodeNamed(e, samlconstants::SAML1P_NS, AttributeDesignator::LOCAL_NAME)) {
 243                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 244                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 245                 if (down) {
 246                     m_SAML1Designators.push_back(down);
 247                     obj.release();
 248                 }
 249             }
 250         }
 251         catch (exception& ex) {
 252             m_log.error("exception loading attribute designator: %s", ex.what());
 253         }
 254         child = XMLHelper::getNextSiblingElement(child);
 255     }
 256 }
 257
 258 void QueryResolver::signMessage(const Application& application, const RoleDescriptor& role, SignableObject& msg) const
 259 {
 260     const PropertySet* relyingParty = application.getRelyingParty(dynamic_cast<const EntityDescriptor*>(role.getParent()));
 261     pair<bool,const char*> prop = relyingParty->getString("signing");
 262     if (prop.first && (!strcmp(prop.second, "true") || !strcmp(prop.second, "back"))) {
 263         CredentialResolver* credResolver=application.getCredentialResolver();
 264         if (credResolver) {
 265             Locker credLocker(credResolver);
 266             // Fill in criteria to use.
 267             MetadataCredentialCriteria mcc(role);
 268             mcc.setUsage(CredentialCriteria::SIGNING_CREDENTIAL);
 269             prop = relyingParty->getString("keyName");
 270             if (prop.first)
 271                 mcc.getKeyNames().insert(prop.second);
 272             pair<bool,const XMLCh*> sigalg = relyingParty->getXMLString("signingAlg");
 273             if (sigalg.first)
 274                 mcc.setXMLAlgorithm(sigalg.second);
 275             const Credential* cred = credResolver->resolve(&mcc);
 276             if (cred) {
 277                 xmlsignature::Signature* sig = xmlsignature::SignatureBuilder::buildSignature();
 278                 msg.setSignature(sig);
 279                 if (sigalg.first)
 280                     sig->setSignatureAlgorithm(sigalg.second);
 281                 sigalg = relyingParty->getXMLString("digestAlg");
 282                 if (sigalg.first) {
 283                     ContentReference* cr = dynamic_cast<ContentReference*>(sig->getContentReference());
 284                     if (cr)
 285                         cr->setDigestAlgorithm(sigalg.second);
 286                 }
 287
 288                 // Sign response while marshalling.
 289                 vector<xmlsignature::Signature*> sigs(1,sig);
 290                 msg.marshall((DOMDocument*)NULL,&sigs,cred);
 291             }
 292             else {
 293                 m_log.warn("no signing credential resolved, leaving query unsigned");
 294             }
 295         }
 296         else {
 297             m_log.warn("no credential resolver installed, leaving query unsigned");
 298         }
 299     }
 300 }
 301
 302 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 303 {
 304 #ifdef _DEBUG
 305     xmltooling::NDC ndc("query");
 306 #endif
 307
 308     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 309     const AttributeAuthorityDescriptor* AA = ctx.getEntityDescriptor()->getAttributeAuthorityDescriptor(ctx.getProtocol());
 310     if (!AA) {
 311         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 312         return false;
 313     }
 314
 315     shibsp::SecurityPolicy policy(ctx.getApplication());
 316     MetadataCredentialCriteria mcc(*AA);
 317     shibsp::SOAPClient soaper(policy);
 318     const PropertySet* policySettings =
 319         ctx.getApplication().getServiceProvider().getPolicySettings(ctx.getApplication().getString("policyId").second);
 320     pair<bool,bool> signedAssertions = policySettings->getBool("signedAssertions");
 321
 322     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 323     saml1p::Response* response=NULL;
 324     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 325     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 326         try {
 327             if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 328                 continue;
 329             auto_ptr_char loc((*ep)->getLocation());
 330             auto_ptr_XMLCh issuer(ctx.getApplication().getString("entityID").second);
 331             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 332             nameid->setName(ctx.getNameID()->getName());
 333             nameid->setFormat(ctx.getNameID()->getFormat());
 334             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 335             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 336             subject->setNameIdentifier(nameid);
 337             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 338             query->setSubject(subject);
 339             query->setResource(issuer.get());
 340             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 341                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 342             Request* request = RequestBuilder::buildRequest();
 343             request->setAttributeQuery(query);
 344             request->setMinorVersion(version);
 345             signMessage(ctx.getApplication(), *AA, *request);
 346
 347             SAML1SOAPClient client(soaper, false);
 348             client.sendSAML(request, mcc, loc.get());
 349             response = client.receiveSAML();
 350         }
 351         catch (exception& ex) {
 352             m_log.error("exception making SAML query: %s", ex.what());
 353             soaper.reset();
 354         }
 355     }
 356
 357     if (!response) {
 358         m_log.error("unable to obtain a SAML response from attribute authority");
 359         return false;
 360     }
 361     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==NULL ||
 362             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 363         delete response;
 364         m_log.error("attribute authority returned a SAML error");
 365         return true;
 366     }
 367
 368     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 369     if (assertions.empty()) {
 370         delete response;
 371         m_log.warn("response from attribute authority was empty");
 372         return true;
 373     }
 374     else if (assertions.size()>1)
 375         m_log.warn("simple resolver only supports one assertion in the query response");
 376
 377     auto_ptr<saml1p::Response> wrapper(response);
 378     saml1::Assertion* newtoken = assertions.front();
 379
 380     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 381         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 382         return true;
 383     }
 384
 385     try {
 386         policy.evaluate(*newtoken);
 387         if (!policy.isSecure())
 388             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 389         saml1::AssertionValidator tokval(ctx.getApplication().getAudiences(), time(NULL));
 390         tokval.validateAssertion(*newtoken);
 391     }
 392     catch (exception& ex) {
 393         m_log.error("assertion failed policy/validation: %s", ex.what());
 394         return true;
 395     }
 396
 397     newtoken->detach();
 398     wrapper.release();
 399     ctx.getResolvedAssertions().push_back(newtoken);
 400
 401     // Finally, extract and filter the result.
 402     try {
 403         AttributeExtractor* extractor = ctx.getApplication().getAttributeExtractor();
 404         if (extractor) {
 405             Locker extlocker(extractor);
 406             extractor->extractAttributes(ctx.getApplication(), AA, *newtoken, ctx.getResolvedAttributes());
 407         }
 408
 409         AttributeFilter* filter = ctx.getApplication().getAttributeFilter();
 410         if (filter) {
 411             BasicFilteringContext fc(ctx.getApplication(), 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     }
 421
 422     return true;
 423 }
 424
 425 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 426 {
 427 #ifdef _DEBUG
 428     xmltooling::NDC ndc("query");
 429 #endif
 430
 431     const AttributeAuthorityDescriptor* AA = ctx.getEntityDescriptor()->getAttributeAuthorityDescriptor(samlconstants::SAML20P_NS);
 432     if (!AA) {
 433         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 434         return false;
 435     }
 436
 437     shibsp::SecurityPolicy policy(ctx.getApplication());
 438     MetadataCredentialCriteria mcc(*AA);
 439     shibsp::SOAPClient soaper(policy);
 440     const PropertySet* policySettings =
 441         ctx.getApplication().getServiceProvider().getPolicySettings(ctx.getApplication().getString("policyId").second);
 442     pair<bool,bool> signedAssertions = policySettings->getBool("signedAssertions");
 443
 444     const PropertySet* relyingParty = ctx.getApplication().getRelyingParty(ctx.getEntityDescriptor());
 445     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 446
 447     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 448     saml2p::StatusResponseType* srt=NULL;
 449     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 450     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 451         try {
 452             if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 453                 continue;
 454             auto_ptr_char loc((*ep)->getLocation());
 455             auto_ptr_XMLCh issuer(ctx.getApplication().getString("entityID").second);
 456
 457             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 458
 459             // Encrypt the NameID?
 460             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 461                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 462                 MetadataCredentialCriteria mcc(*AA);
 463                 encrypted->encrypt(
 464                     *ctx.getNameID(),
 465                     *(ctx.getApplication().getMetadataProvider()),
 466                     mcc,
 467                     false,
 468                     relyingParty->getXMLString("encryptionAlg").second
 469                     );
 470                 subject->setEncryptedID(encrypted.release());
 471             }
 472             else {
 473                 subject->setNameID(ctx.getNameID()->cloneNameID());
 474             }
 475
 476             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 477             query->setSubject(subject.release());
 478             Issuer* iss = IssuerBuilder::buildIssuer();
 479             iss->setName(issuer.get());
 480             query->setIssuer(iss);
 481             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 482                 query->getAttributes().push_back((*ad)->cloneAttribute());
 483             signMessage(ctx.getApplication(), *AA, *query);
 484
 485             SAML2SOAPClient client(soaper, false);
 486             client.sendSAML(query, mcc, loc.get());
 487             srt = client.receiveSAML();
 488         }
 489         catch (exception& ex) {
 490             m_log.error("exception making SAML query: %s", ex.what());
 491             soaper.reset();
 492         }
 493     }
 494
 495     if (!srt) {
 496         m_log.error("unable to obtain a SAML response from attribute authority");
 497         return false;
 498     }
 499     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 500     if (!response) {
 501         delete srt;
 502         m_log.error("message was not a samlp:Response");
 503         return true;
 504     }
 505     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 506             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 507         delete srt;
 508         m_log.error("attribute authority returned a SAML error");
 509         return true;
 510     }
 511
 512     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 513     if (assertions.empty()) {
 514         delete srt;
 515         m_log.warn("response from attribute authority was empty");
 516         return true;
 517     }
 518     else if (assertions.size()>1)
 519         m_log.warn("simple resolver only supports one assertion in the query response");
 520
 521     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 522     saml2::Assertion* newtoken = assertions.front();
 523
 524     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 525         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 526         return true;
 527     }
 528
 529     try {
 530         policy.evaluate(*newtoken);
 531         if (!policy.isSecure())
 532             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 533         saml2::AssertionValidator tokval(ctx.getApplication().getAudiences(), time(NULL));
 534         tokval.validateAssertion(*newtoken);
 535     }
 536     catch (exception& ex) {
 537         m_log.error("assertion failed policy/validation: %s", ex.what());
 538         return true;
 539     }
 540
 541     newtoken->detach();
 542     wrapper.release();
 543     ctx.getResolvedAssertions().push_back(newtoken);
 544
 545     // Finally, extract and filter the result.
 546     try {
 547         AttributeExtractor* extractor = ctx.getApplication().getAttributeExtractor();
 548         if (extractor) {
 549             Locker extlocker(extractor);
 550             extractor->extractAttributes(ctx.getApplication(), AA, *newtoken, ctx.getResolvedAttributes());
 551         }
 552
 553         AttributeFilter* filter = ctx.getApplication().getAttributeFilter();
 554         if (filter) {
 555             BasicFilteringContext fc(ctx.getApplication(), ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 556             Locker filtlocker(filter);
 557             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 558         }
 559     }
 560     catch (exception& ex) {
 561         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 562         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 563         ctx.getResolvedAttributes().clear();
 564     }
 565
 566     return true;
 567 }
 568
 569 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 570 {
 571 #ifdef _DEBUG
 572     xmltooling::NDC ndc("resolveAttributes");
 573 #endif
 574
 575     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 576     if (!qctx.doQuery()) {
 577         m_log.debug("found AttributeStatement in input to new session, skipping query");
 578         return;
 579     }
 580
 581     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 582         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 583             m_log.debug("attempting SAML 2.0 attribute query");
 584             SAML2Query(qctx);
 585         }
 586         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 587                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 588             m_log.debug("attempting SAML 1.x attribute query");
 589             SAML1Query(qctx);
 590         }
 591         else
 592             m_log.warn("SSO protocol does not allow for attribute query");
 593     }
 594     else
 595         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 596 }