shibsp/attribute/resolver/impl/QueryAttributeResolver.cpp

   1 /*
   2  *  Copyright 2001-2009 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 "util/SPConstants.h"
  37
  38 #include <saml/exceptions.h>
  39 #include <saml/saml1/binding/SAML1SOAPClient.h>
  40 #include <saml/saml1/core/Assertions.h>
  41 #include <saml/saml1/core/Protocols.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/MetadataCredentialCriteria.h>
  46 #include <saml/saml2/metadata/MetadataProvider.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=NULL,
  78             const XMLCh* authncontext_class=NULL,
  79             const XMLCh* authncontext_decl=NULL,
  80             const vector<const opensaml::Assertion*>* tokens=NULL
  81             ) : m_query(true), m_app(application), m_session(NULL), m_metadata(NULL), m_entity(issuer),
  82                 m_protocol(protocol), m_nameid(nameid), m_class(authncontext_class), m_decl(authncontext_decl) {
  83
  84             if (tokens) {
  85                 for (vector<const opensaml::Assertion*>::const_iterator t = tokens->begin(); t!=tokens->end(); ++t) {
  86                     const saml2::Assertion* token2 = dynamic_cast<const saml2::Assertion*>(*t);
  87                     if (token2 && !token2->getAttributeStatements().empty()) {
  88                         m_query = false;
  89                     }
  90                     else {
  91                         const saml1::Assertion* token1 = dynamic_cast<const saml1::Assertion*>(*t);
  92                         if (token1 && !token1->getAttributeStatements().empty()) {
  93                             m_query = false;
  94                         }
  95                     }
  96                 }
  97             }
  98         }
  99
 100         ~QueryContext() {
 101             if (m_session) {
 102                 XMLString::release((XMLCh**)&m_protocol);
 103                 XMLString::release((XMLCh**)&m_class);
 104                 XMLString::release((XMLCh**)&m_decl);
 105             }
 106             if (m_metadata)
 107                 m_metadata->unlock();
 108             for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 109             for_each(m_assertions.begin(), m_assertions.end(), xmltooling::cleanup<opensaml::Assertion>());
 110         }
 111
 112         bool doQuery() const {
 113             return m_query;
 114         }
 115
 116         const Application& getApplication() const {
 117             return m_app;
 118         }
 119         const EntityDescriptor* getEntityDescriptor() const {
 120             if (m_entity)
 121                 return m_entity;
 122             if (m_session && m_session->getEntityID()) {
 123                 m_metadata = m_app.getMetadataProvider(false);
 124                 if (m_metadata) {
 125                     m_metadata->lock();
 126                     return m_entity = m_metadata->getEntityDescriptor(MetadataProviderCriteria(m_app, m_session->getEntityID())).first;
 127                 }
 128             }
 129             return NULL;
 130         }
 131         const XMLCh* getProtocol() const {
 132             return m_protocol;
 133         }
 134         const NameID* getNameID() const {
 135             return m_session ? m_session->getNameID() : m_nameid;
 136         }
 137         const XMLCh* getClassRef() const {
 138             return m_class;
 139         }
 140         const XMLCh* getDeclRef() const {
 141             return m_decl;
 142         }
 143         const Session* getSession() const {
 144             return m_session;
 145         }
 146         vector<shibsp::Attribute*>& getResolvedAttributes() {
 147             return m_attributes;
 148         }
 149         vector<opensaml::Assertion*>& getResolvedAssertions() {
 150             return m_assertions;
 151         }
 152
 153     private:
 154         bool m_query;
 155         const Application& m_app;
 156         const Session* m_session;
 157         mutable MetadataProvider* m_metadata;
 158         mutable const EntityDescriptor* m_entity;
 159         const XMLCh* m_protocol;
 160         const NameID* m_nameid;
 161         const XMLCh* m_class;
 162         const XMLCh* m_decl;
 163         vector<shibsp::Attribute*> m_attributes;
 164         vector<opensaml::Assertion*> m_assertions;
 165     };
 166
 167     class SHIBSP_DLLLOCAL QueryResolver : public AttributeResolver
 168     {
 169     public:
 170         QueryResolver(const DOMElement* e);
 171         ~QueryResolver() {
 172             for_each(m_SAML1Designators.begin(), m_SAML1Designators.end(), xmltooling::cleanup<AttributeDesignator>());
 173             for_each(m_SAML2Designators.begin(), m_SAML2Designators.end(), xmltooling::cleanup<saml2::Attribute>());
 174         }
 175
 176         Lockable* lock() {return this;}
 177         void unlock() {}
 178
 179         ResolutionContext* createResolutionContext(
 180             const Application& application,
 181             const EntityDescriptor* issuer,
 182             const XMLCh* protocol,
 183             const NameID* nameid=NULL,
 184             const XMLCh* authncontext_class=NULL,
 185             const XMLCh* authncontext_decl=NULL,
 186             const vector<const opensaml::Assertion*>* tokens=NULL,
 187             const vector<shibsp::Attribute*>* attributes=NULL
 188             ) const {
 189             return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens);
 190         }
 191
 192         ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
 193             return new QueryContext(application,session);
 194         }
 195
 196         void resolveAttributes(ResolutionContext& ctx) const;
 197
 198         void getAttributeIds(vector<string>& attributes) const {
 199             // Nothing to do, only the extractor would actually generate them.
 200         }
 201
 202     private:
 203         bool SAML1Query(QueryContext& ctx) const;
 204         bool SAML2Query(QueryContext& ctx) const;
 205
 206         Category& m_log;
 207         string m_policyId;
 208         bool m_subjectMatch;
 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     static const XMLCh policyId[] =     UNICODE_LITERAL_8(p,o,l,i,c,y,I,d);
 219     static const XMLCh subjectMatch[] = UNICODE_LITERAL_12(s,u,b,j,e,c,t,M,a,t,c,h);
 220 };
 221
 222 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver.Query")), m_subjectMatch(false)
 223 {
 224 #ifdef _DEBUG
 225     xmltooling::NDC ndc("QueryResolver");
 226 #endif
 227
 228     const XMLCh* pid = e ? e->getAttributeNS(NULL, policyId) : NULL;
 229     if (pid && *pid) {
 230         auto_ptr_char temp(pid);
 231         m_policyId = temp.get();
 232     }
 233     pid = e ? e->getAttributeNS(NULL, subjectMatch) : NULL;
 234     if (pid && (*pid == chLatin_t || *pid == chDigit_1))
 235         m_subjectMatch = true;
 236
 237     DOMElement* child = XMLHelper::getFirstChildElement(e);
 238     while (child) {
 239         try {
 240             if (XMLHelper::isNodeNamed(child, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 241                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 242                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 243                 if (down) {
 244                     m_SAML2Designators.push_back(down);
 245                     obj.release();
 246                 }
 247             }
 248             else if (XMLHelper::isNodeNamed(child, samlconstants::SAML1_NS, AttributeDesignator::LOCAL_NAME)) {
 249                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 250                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 251                 if (down) {
 252                     m_SAML1Designators.push_back(down);
 253                     obj.release();
 254                 }
 255             }
 256         }
 257         catch (exception& ex) {
 258             m_log.error("exception loading attribute designator: %s", ex.what());
 259         }
 260         child = XMLHelper::getNextSiblingElement(child);
 261     }
 262 }
 263
 264 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 265 {
 266 #ifdef _DEBUG
 267     xmltooling::NDC ndc("query");
 268 #endif
 269
 270     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 271     const AttributeAuthorityDescriptor* AA =
 272         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 273     if (!AA) {
 274         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 275         return false;
 276     }
 277
 278     const Application& application = ctx.getApplication();
 279     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 280
 281     // Locate policy key.
 282     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 283
 284     // Access policy properties.
 285     const PropertySet* settings = application.getServiceProvider().getPolicySettings(policyId);
 286     pair<bool,bool> validate = settings->getBool("validate");
 287
 288     shibsp::SecurityPolicy policy(application, NULL, validate.first && validate.second, policyId);
 289     policy.getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 290     MetadataCredentialCriteria mcc(*AA);
 291     shibsp::SOAPClient soaper(policy);
 292
 293     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 294     saml1p::Response* response=NULL;
 295     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 296     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 297         if (!XMLString::equals((*ep)->getBinding(),binding.get()) || !(*ep)->getLocation())
 298             continue;
 299         auto_ptr_char loc((*ep)->getLocation());
 300         try {
 301             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 302             nameid->setName(ctx.getNameID()->getName());
 303             nameid->setFormat(ctx.getNameID()->getFormat());
 304             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 305             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 306             subject->setNameIdentifier(nameid);
 307             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 308             query->setSubject(subject);
 309             query->setResource(relyingParty->getXMLString("entityID").second);
 310             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 311                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 312             Request* request = RequestBuilder::buildRequest();
 313             request->setAttributeQuery(query);
 314             request->setMinorVersion(version);
 315
 316             SAML1SOAPClient client(soaper, false);
 317             client.sendSAML(request, application.getId(), mcc, loc.get());
 318             response = client.receiveSAML();
 319         }
 320         catch (exception& ex) {
 321             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 322             soaper.reset();
 323         }
 324     }
 325
 326     if (!response) {
 327         m_log.error("unable to obtain a SAML response from attribute authority");
 328         return false;
 329     }
 330     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==NULL ||
 331             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 332         delete response;
 333         m_log.error("attribute authority returned a SAML error");
 334         return true;
 335     }
 336
 337     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 338     if (assertions.empty()) {
 339         delete response;
 340         m_log.warn("response from attribute authority was empty");
 341         return true;
 342     }
 343     else if (assertions.size()>1)
 344         m_log.warn("simple resolver only supports one assertion in the query response");
 345
 346     auto_ptr<saml1p::Response> wrapper(response);
 347     saml1::Assertion* newtoken = assertions.front();
 348
 349     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 350     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 351         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 352         return true;
 353     }
 354
 355     try {
 356         // We're going to insist that the assertion issuer is the same as the peer.
 357         // Reset the policy's message bits and extract them from the assertion.
 358         policy.reset(true);
 359         policy.setMessageID(newtoken->getAssertionID());
 360         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 361         policy.setIssuer(newtoken->getIssuer());
 362         policy.evaluate(*newtoken);
 363
 364         // Now we can check the security status of the policy.
 365         if (!policy.isAuthenticated())
 366             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 367     }
 368     catch (exception& ex) {
 369         m_log.error("assertion failed policy validation: %s", ex.what());
 370         return true;
 371     }
 372
 373     newtoken->detach();
 374     wrapper.release();  // detach blows away the Response
 375     ctx.getResolvedAssertions().push_back(newtoken);
 376
 377     // Finally, extract and filter the result.
 378     try {
 379         AttributeExtractor* extractor = application.getAttributeExtractor();
 380         if (extractor) {
 381             Locker extlocker(extractor);
 382             const vector<saml1::AttributeStatement*>& statements = const_cast<const saml1::Assertion*>(newtoken)->getAttributeStatements();
 383             for (vector<saml1::AttributeStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
 384                 if (m_subjectMatch) {
 385                     // Check for subject match.
 386                     const NameIdentifier* respName = (*s)->getSubject() ? (*s)->getSubject()->getNameIdentifier() : NULL;
 387                     if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 388                         !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 389                         !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier())) {
 390                         if (respName)
 391                             m_log.warnStream() << "ignoring AttributeStatement without strongly matching NameIdentifier in Subject: " <<
 392                                 *respName << logging::eol;
 393                         else
 394                             m_log.warn("ignoring AttributeStatement without NameIdentifier in Subject");
 395                         continue;
 396                     }
 397                 }
 398                 extractor->extractAttributes(application, AA, *(*s), ctx.getResolvedAttributes());
 399             }
 400         }
 401
 402         AttributeFilter* filter = application.getAttributeFilter();
 403         if (filter) {
 404             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 405             Locker filtlocker(filter);
 406             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 407         }
 408     }
 409     catch (exception& ex) {
 410         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 411         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 412         ctx.getResolvedAttributes().clear();
 413     }
 414
 415     return true;
 416 }
 417
 418 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 419 {
 420 #ifdef _DEBUG
 421     xmltooling::NDC ndc("query");
 422 #endif
 423
 424     const AttributeAuthorityDescriptor* AA =
 425         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 426     if (!AA) {
 427         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 428         return false;
 429     }
 430
 431     const Application& application = ctx.getApplication();
 432     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 433
 434     // Locate policy key.
 435     const char* policyId = m_policyId.empty() ? application.getString("policyId").second : m_policyId.c_str();
 436
 437     // Access policy properties.
 438     const PropertySet* settings = application.getServiceProvider().getPolicySettings(policyId);
 439     pair<bool,bool> validate = settings->getBool("validate");
 440
 441     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 442     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 443
 444     shibsp::SecurityPolicy policy(application, NULL, validate.first && validate.second, policyId);
 445     policy.getAudiences().push_back(relyingParty->getXMLString("entityID").second);
 446     MetadataCredentialCriteria mcc(*AA);
 447     shibsp::SOAPClient soaper(policy);
 448
 449     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 450     saml2p::StatusResponseType* srt=NULL;
 451     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 452     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 453         if (!XMLString::equals((*ep)->getBinding(),binding.get())  || !(*ep)->getLocation())
 454             continue;
 455         auto_ptr_char loc((*ep)->getLocation());
 456         try {
 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                 encrypted->encrypt(
 463                     *ctx.getNameID(),
 464                     *(application.getMetadataProvider()),
 465                     mcc,
 466                     false,
 467                     relyingParty->getXMLString("encryptionAlg").second
 468                     );
 469                 subject->setEncryptedID(encrypted.release());
 470             }
 471             else {
 472                 subject->setNameID(ctx.getNameID()->cloneNameID());
 473             }
 474
 475             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 476             query->setSubject(subject.release());
 477             Issuer* iss = IssuerBuilder::buildIssuer();
 478             iss->setName(relyingParty->getXMLString("entityID").second);
 479             query->setIssuer(iss);
 480             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 481                 query->getAttributes().push_back((*ad)->cloneAttribute());
 482
 483             SAML2SOAPClient client(soaper, false);
 484             client.sendSAML(query, application.getId(), mcc, loc.get());
 485             srt = client.receiveSAML();
 486         }
 487         catch (exception& ex) {
 488             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 489             soaper.reset();
 490         }
 491     }
 492
 493     if (!srt) {
 494         m_log.error("unable to obtain a SAML response from attribute authority");
 495         return false;
 496     }
 497
 498     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 499
 500     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 501     if (!response) {
 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         m_log.error("attribute authority returned a SAML error");
 508         return true;
 509     }
 510
 511     saml2::Assertion* newtoken = NULL;
 512     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 513     if (assertions.empty()) {
 514         // Check for encryption.
 515         const vector<saml2::EncryptedAssertion*>& encassertions = const_cast<const saml2p::Response*>(response)->getEncryptedAssertions();
 516         if (encassertions.empty()) {
 517             m_log.warn("response from attribute authority was empty");
 518             return true;
 519         }
 520         else if (encassertions.size() > 1) {
 521             m_log.warn("simple resolver only supports one assertion in the query response");
 522         }
 523
 524         CredentialResolver* cr=application.getCredentialResolver();
 525         if (!cr) {
 526             m_log.warn("found encrypted assertion, but no CredentialResolver was available");
 527             return true;
 528         }
 529
 530         // Attempt to decrypt it.
 531         try {
 532             Locker credlocker(cr);
 533             auto_ptr<XMLObject> tokenwrapper(encassertions.front()->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 534             newtoken = dynamic_cast<saml2::Assertion*>(tokenwrapper.get());
 535             if (newtoken) {
 536                 tokenwrapper.release();
 537                 if (m_log.isDebugEnabled())
 538                     m_log.debugStream() << "decrypted Assertion: " << *newtoken << logging::eol;
 539             }
 540         }
 541         catch (exception& ex) {
 542             m_log.error(ex.what());
 543         }
 544         if (newtoken) {
 545             // Free the Response now, so we know this is a stand-alone token later.
 546             delete wrapper.release();
 547         }
 548         else {
 549             // Nothing decrypted, should already be logged.
 550             return true;
 551         }
 552     }
 553     else {
 554         if (assertions.size() > 1)
 555             m_log.warn("simple resolver only supports one assertion in the query response");
 556         newtoken = assertions.front();
 557     }
 558
 559     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 560         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 561         if (!wrapper.get())
 562             delete newtoken;
 563         return true;
 564     }
 565
 566     try {
 567         // We're going to insist that the assertion issuer is the same as the peer.
 568         // Reset the policy's message bits and extract them from the assertion.
 569         policy.reset(true);
 570         policy.setMessageID(newtoken->getID());
 571         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 572         policy.setIssuer(newtoken->getIssuer());
 573         policy.evaluate(*newtoken);
 574
 575         // Now we can check the security status of the policy.
 576         if (!policy.isAuthenticated())
 577             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 578
 579         if (m_subjectMatch) {
 580             // Check for subject match.
 581             bool ownedName = false;
 582             NameID* respName = newtoken->getSubject() ? newtoken->getSubject()->getNameID() : NULL;
 583             if (!respName) {
 584                 // Check for encryption.
 585                 EncryptedID* encname = newtoken->getSubject() ? newtoken->getSubject()->getEncryptedID() : NULL;
 586                 if (encname) {
 587                     CredentialResolver* cr=application.getCredentialResolver();
 588                     if (!cr)
 589                         m_log.warn("found EncryptedID, but no CredentialResolver was available");
 590                     else {
 591                         Locker credlocker(cr);
 592                         auto_ptr<XMLObject> decryptedID(encname->decrypt(*cr, relyingParty->getXMLString("entityID").second, &mcc));
 593                         respName = dynamic_cast<NameID*>(decryptedID.get());
 594                         if (respName) {
 595                             ownedName = true;
 596                             decryptedID.release();
 597                             if (m_log.isDebugEnabled())
 598                                 m_log.debugStream() << "decrypted NameID: " << *respName << logging::eol;
 599                         }
 600                     }
 601                 }
 602             }
 603
 604             auto_ptr<NameID> nameIDwrapper(ownedName ? respName : NULL);
 605
 606             if (!respName || !XMLString::equals(respName->getName(), ctx.getNameID()->getName()) ||
 607                 !XMLString::equals(respName->getFormat(), ctx.getNameID()->getFormat()) ||
 608                 !XMLString::equals(respName->getNameQualifier(), ctx.getNameID()->getNameQualifier()) ||
 609                 !XMLString::equals(respName->getSPNameQualifier(), ctx.getNameID()->getSPNameQualifier())) {
 610                 if (respName)
 611                     m_log.warnStream() << "ignoring Assertion without strongly matching NameID in Subject: " <<
 612                         *respName << logging::eol;
 613                 else
 614                     m_log.warn("ignoring Assertion without NameID in Subject");
 615                 if (!wrapper.get())
 616                     delete newtoken;
 617                 return true;
 618             }
 619         }
 620     }
 621     catch (exception& ex) {
 622         m_log.error("assertion failed policy validation: %s", ex.what());
 623         if (!wrapper.get())
 624             delete newtoken;
 625         return true;
 626     }
 627
 628     if (wrapper.get()) {
 629         newtoken->detach();
 630         wrapper.release();  // detach blows away the Response
 631     }
 632     ctx.getResolvedAssertions().push_back(newtoken);
 633
 634     // Finally, extract and filter the result.
 635     try {
 636         AttributeExtractor* extractor = application.getAttributeExtractor();
 637         if (extractor) {
 638             Locker extlocker(extractor);
 639             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 640         }
 641
 642         AttributeFilter* filter = application.getAttributeFilter();
 643         if (filter) {
 644             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 645             Locker filtlocker(filter);
 646             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 647         }
 648     }
 649     catch (exception& ex) {
 650         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 651         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 652         ctx.getResolvedAttributes().clear();
 653     }
 654
 655     return true;
 656 }
 657
 658 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 659 {
 660 #ifdef _DEBUG
 661     xmltooling::NDC ndc("resolveAttributes");
 662 #endif
 663
 664     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 665     if (!qctx.doQuery()) {
 666         m_log.debug("found AttributeStatement in input to new session, skipping query");
 667         return;
 668     }
 669
 670     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 671         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 672             m_log.debug("attempting SAML 2.0 attribute query");
 673             SAML2Query(qctx);
 674         }
 675         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 676                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 677             m_log.debug("attempting SAML 1.x attribute query");
 678             SAML1Query(qctx);
 679         }
 680         else {
 681             m_log.info("SSO protocol does not allow for attribute query");
 682         }
 683     }
 684     else {
 685         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 686     }
 687 }