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=NULL,
  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(false);
 125                 if (m_metadata) {
 126                     m_metadata->lock();
 127                     return m_entity = m_metadata->getEntityDescriptor(MetadataProvider::Criteria(m_session->getEntityID())).first;
 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=NULL,
 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
 207         Category& m_log;
 208         vector<AttributeDesignator*> m_SAML1Designators;
 209         vector<saml2::Attribute*> m_SAML2Designators;
 210     };
 211
 212     AttributeResolver* SHIBSP_DLLLOCAL QueryResolverFactory(const DOMElement* const & e)
 213     {
 214         return new QueryResolver(e);
 215     }
 216
 217 };
 218
 219 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver"))
 220 {
 221 #ifdef _DEBUG
 222     xmltooling::NDC ndc("QueryResolver");
 223 #endif
 224
 225     DOMElement* child = XMLHelper::getFirstChildElement(e);
 226     while (child) {
 227         try {
 228             if (XMLHelper::isNodeNamed(e, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 229                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 230                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 231                 if (down) {
 232                     m_SAML2Designators.push_back(down);
 233                     obj.release();
 234                 }
 235             }
 236             else if (XMLHelper::isNodeNamed(e, samlconstants::SAML1P_NS, AttributeDesignator::LOCAL_NAME)) {
 237                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 238                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 239                 if (down) {
 240                     m_SAML1Designators.push_back(down);
 241                     obj.release();
 242                 }
 243             }
 244         }
 245         catch (exception& ex) {
 246             m_log.error("exception loading attribute designator: %s", ex.what());
 247         }
 248         child = XMLHelper::getNextSiblingElement(child);
 249     }
 250 }
 251
 252 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 253 {
 254 #ifdef _DEBUG
 255     xmltooling::NDC ndc("query");
 256 #endif
 257
 258     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 259     const AttributeAuthorityDescriptor* AA =
 260         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 261     if (!AA) {
 262         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 263         return false;
 264     }
 265
 266     const Application& application = ctx.getApplication();
 267     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 268     shibsp::SecurityPolicy policy(application);
 269     MetadataCredentialCriteria mcc(*AA);
 270     shibsp::SOAPClient soaper(policy);
 271
 272     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 273     saml1p::Response* response=NULL;
 274     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 275     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 276         if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 277             continue;
 278         auto_ptr_char loc((*ep)->getLocation());
 279         try {
 280             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 281             nameid->setName(ctx.getNameID()->getName());
 282             nameid->setFormat(ctx.getNameID()->getFormat());
 283             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 284             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 285             subject->setNameIdentifier(nameid);
 286             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 287             query->setSubject(subject);
 288             query->setResource(relyingParty->getXMLString("entityID").second);
 289             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 290                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 291             Request* request = RequestBuilder::buildRequest();
 292             request->setAttributeQuery(query);
 293             request->setMinorVersion(version);
 294
 295             SAML1SOAPClient client(soaper, false);
 296             client.sendSAML(request, application.getId(), mcc, loc.get());
 297             response = client.receiveSAML();
 298         }
 299         catch (exception& ex) {
 300             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 301             soaper.reset();
 302         }
 303     }
 304
 305     if (!response) {
 306         m_log.error("unable to obtain a SAML response from attribute authority");
 307         return false;
 308     }
 309     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==NULL ||
 310             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 311         delete response;
 312         m_log.error("attribute authority returned a SAML error");
 313         return true;
 314     }
 315
 316     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 317     if (assertions.empty()) {
 318         delete response;
 319         m_log.warn("response from attribute authority was empty");
 320         return true;
 321     }
 322     else if (assertions.size()>1)
 323         m_log.warn("simple resolver only supports one assertion in the query response");
 324
 325     auto_ptr<saml1p::Response> wrapper(response);
 326     saml1::Assertion* newtoken = assertions.front();
 327
 328     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 329     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 330         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 331         return true;
 332     }
 333
 334     try {
 335         // We're going to insist that the assertion issuer is the same as the peer.
 336         // Reset the policy's message bits and extract them from the assertion.
 337         policy.reset(true);
 338         policy.setMessageID(newtoken->getAssertionID());
 339         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 340         policy.setIssuer(newtoken->getIssuer());
 341         policy.evaluate(*newtoken);
 342
 343         // Now we can check the security status of the policy.
 344         if (!policy.isAuthenticated())
 345             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 346
 347         // Lastly, check it over.
 348         saml1::AssertionValidator tokval(relyingParty->getXMLString("entityID").second, application.getAudiences(), time(NULL));
 349         tokval.validateAssertion(*newtoken);
 350     }
 351     catch (exception& ex) {
 352         m_log.error("assertion failed policy/validation: %s", ex.what());
 353         return true;
 354     }
 355
 356     newtoken->detach();
 357     wrapper.release();
 358     ctx.getResolvedAssertions().push_back(newtoken);
 359
 360     // Finally, extract and filter the result.
 361     try {
 362         AttributeExtractor* extractor = application.getAttributeExtractor();
 363         if (extractor) {
 364             Locker extlocker(extractor);
 365             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 366         }
 367
 368         AttributeFilter* filter = application.getAttributeFilter();
 369         if (filter) {
 370             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 371             Locker filtlocker(filter);
 372             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 373         }
 374     }
 375     catch (exception& ex) {
 376         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 377         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 378         ctx.getResolvedAttributes().clear();
 379     }
 380
 381     return true;
 382 }
 383
 384 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 385 {
 386 #ifdef _DEBUG
 387     xmltooling::NDC ndc("query");
 388 #endif
 389
 390     const AttributeAuthorityDescriptor* AA =
 391         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 392     if (!AA) {
 393         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 394         return false;
 395     }
 396
 397     const Application& application = ctx.getApplication();
 398     shibsp::SecurityPolicy policy(application);
 399     MetadataCredentialCriteria mcc(*AA);
 400     shibsp::SOAPClient soaper(policy);
 401
 402     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 403     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 404     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 405
 406     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 407     saml2p::StatusResponseType* srt=NULL;
 408     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 409     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 410         if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 411             continue;
 412         auto_ptr_char loc((*ep)->getLocation());
 413         try {
 414             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 415
 416             // Encrypt the NameID?
 417             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 418                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 419                 MetadataCredentialCriteria mcc(*AA);
 420                 encrypted->encrypt(
 421                     *ctx.getNameID(),
 422                     *(application.getMetadataProvider()),
 423                     mcc,
 424                     false,
 425                     relyingParty->getXMLString("encryptionAlg").second
 426                     );
 427                 subject->setEncryptedID(encrypted.release());
 428             }
 429             else {
 430                 subject->setNameID(ctx.getNameID()->cloneNameID());
 431             }
 432
 433             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 434             query->setSubject(subject.release());
 435             Issuer* iss = IssuerBuilder::buildIssuer();
 436             iss->setName(relyingParty->getXMLString("entityID").second);
 437             query->setIssuer(iss);
 438             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 439                 query->getAttributes().push_back((*ad)->cloneAttribute());
 440
 441             SAML2SOAPClient client(soaper, false);
 442             client.sendSAML(query, application.getId(), mcc, loc.get());
 443             srt = client.receiveSAML();
 444         }
 445         catch (exception& ex) {
 446             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 447             soaper.reset();
 448         }
 449     }
 450
 451     if (!srt) {
 452         m_log.error("unable to obtain a SAML response from attribute authority");
 453         return false;
 454     }
 455     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 456     if (!response) {
 457         delete srt;
 458         m_log.error("message was not a samlp:Response");
 459         return true;
 460     }
 461     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 462             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 463         delete srt;
 464         m_log.error("attribute authority returned a SAML error");
 465         return true;
 466     }
 467
 468     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 469     if (assertions.empty()) {
 470         delete srt;
 471         m_log.warn("response from attribute authority was empty");
 472         return true;
 473     }
 474     else if (assertions.size()>1)
 475         m_log.warn("simple resolver only supports one assertion in the query response");
 476
 477     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 478     saml2::Assertion* newtoken = assertions.front();
 479
 480     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 481         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 482         return true;
 483     }
 484
 485     try {
 486         // We're going to insist that the assertion issuer is the same as the peer.
 487         // Reset the policy's message bits and extract them from the assertion.
 488         policy.reset(true);
 489         policy.setMessageID(newtoken->getID());
 490         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 491         policy.setIssuer(newtoken->getIssuer());
 492         policy.evaluate(*newtoken);
 493
 494         // Now we can check the security status of the policy.
 495         if (!policy.isAuthenticated())
 496             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 497
 498         // Lastly, check it over.
 499         saml2::AssertionValidator tokval(relyingParty->getXMLString("entityID").second, application.getAudiences(), time(NULL));
 500         tokval.validateAssertion(*newtoken);
 501     }
 502     catch (exception& ex) {
 503         m_log.error("assertion failed policy/validation: %s", ex.what());
 504         return true;
 505     }
 506
 507     newtoken->detach();
 508     wrapper.release();
 509     ctx.getResolvedAssertions().push_back(newtoken);
 510
 511     // Finally, extract and filter the result.
 512     try {
 513         AttributeExtractor* extractor = application.getAttributeExtractor();
 514         if (extractor) {
 515             Locker extlocker(extractor);
 516             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 517         }
 518
 519         AttributeFilter* filter = application.getAttributeFilter();
 520         if (filter) {
 521             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 522             Locker filtlocker(filter);
 523             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 524         }
 525     }
 526     catch (exception& ex) {
 527         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 528         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 529         ctx.getResolvedAttributes().clear();
 530     }
 531
 532     return true;
 533 }
 534
 535 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 536 {
 537 #ifdef _DEBUG
 538     xmltooling::NDC ndc("resolveAttributes");
 539 #endif
 540
 541     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 542     if (!qctx.doQuery()) {
 543         m_log.debug("found AttributeStatement in input to new session, skipping query");
 544         return;
 545     }
 546
 547     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 548         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 549             m_log.debug("attempting SAML 2.0 attribute query");
 550             SAML2Query(qctx);
 551         }
 552         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 553                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 554             m_log.debug("attempting SAML 1.x attribute query");
 555             SAML1Query(qctx);
 556         }
 557         else
 558             m_log.warn("SSO protocol does not allow for attribute query");
 559     }
 560     else
 561         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 562 }