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 "metadata/MetadataProviderCriteria.h"
  35 #include "util/SPConstants.h"
  36
  37 #include <saml/exceptions.h>
  38 #include <saml/binding/SecurityPolicy.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/saml1/profile/AssertionValidator.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/MetadataProvider.h>
  47 #include <saml/saml2/profile/AssertionValidator.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(NULL), m_entity(NULL), m_nameid(NULL) {
  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=NULL,
  79             const XMLCh* authncontext_class=NULL,
  80             const XMLCh* authncontext_decl=NULL,
  81             const vector<const opensaml::Assertion*>* tokens=NULL,
  82             const vector<Attribute*>* attributes=NULL
  83             ) : m_query(true), m_app(application), m_session(NULL), m_metadata(NULL), m_entity(issuer),
  84                 m_protocol(protocol), m_nameid(nameid), m_class(authncontext_class), m_decl(authncontext_decl) {
  85
  86             if (tokens) {
  87                 for (vector<const opensaml::Assertion*>::const_iterator t = tokens->begin(); t!=tokens->end(); ++t) {
  88                     const saml2::Assertion* token2 = dynamic_cast<const saml2::Assertion*>(*t);
  89                     if (token2 && !token2->getAttributeStatements().empty()) {
  90                         m_query = false;
  91                     }
  92                     else {
  93                         const saml1::Assertion* token1 = dynamic_cast<const saml1::Assertion*>(*t);
  94                         if (token1 && !token1->getAttributeStatements().empty()) {
  95                             m_query = false;
  96                         }
  97                     }
  98                 }
  99             }
 100         }
 101
 102         ~QueryContext() {
 103             if (m_session) {
 104                 XMLString::release((XMLCh**)&m_protocol);
 105                 XMLString::release((XMLCh**)&m_class);
 106                 XMLString::release((XMLCh**)&m_decl);
 107             }
 108             if (m_metadata)
 109                 m_metadata->unlock();
 110             for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<shibsp::Attribute>());
 111             for_each(m_assertions.begin(), m_assertions.end(), xmltooling::cleanup<opensaml::Assertion>());
 112         }
 113
 114         bool doQuery() const {
 115             return m_query;
 116         }
 117
 118         const Application& getApplication() const {
 119             return m_app;
 120         }
 121         const EntityDescriptor* getEntityDescriptor() const {
 122             if (m_entity)
 123                 return m_entity;
 124             if (m_session && m_session->getEntityID()) {
 125                 m_metadata = m_app.getMetadataProvider(false);
 126                 if (m_metadata) {
 127                     m_metadata->lock();
 128                     return m_entity = m_metadata->getEntityDescriptor(MetadataProviderCriteria(m_app, m_session->getEntityID())).first;
 129                 }
 130             }
 131             return NULL;
 132         }
 133         const XMLCh* getProtocol() const {
 134             return m_protocol;
 135         }
 136         const NameID* getNameID() const {
 137             return m_session ? m_session->getNameID() : m_nameid;
 138         }
 139         const XMLCh* getClassRef() const {
 140             return m_class;
 141         }
 142         const XMLCh* getDeclRef() const {
 143             return m_decl;
 144         }
 145         const Session* getSession() const {
 146             return m_session;
 147         }
 148         vector<shibsp::Attribute*>& getResolvedAttributes() {
 149             return m_attributes;
 150         }
 151         vector<opensaml::Assertion*>& getResolvedAssertions() {
 152             return m_assertions;
 153         }
 154
 155     private:
 156         bool m_query;
 157         const Application& m_app;
 158         const Session* m_session;
 159         mutable MetadataProvider* m_metadata;
 160         mutable const EntityDescriptor* m_entity;
 161         const XMLCh* m_protocol;
 162         const NameID* m_nameid;
 163         const XMLCh* m_class;
 164         const XMLCh* m_decl;
 165         vector<shibsp::Attribute*> m_attributes;
 166         vector<opensaml::Assertion*> m_assertions;
 167     };
 168
 169     class SHIBSP_DLLLOCAL QueryResolver : public AttributeResolver
 170     {
 171     public:
 172         QueryResolver(const DOMElement* e);
 173         ~QueryResolver() {
 174             for_each(m_SAML1Designators.begin(), m_SAML1Designators.end(), xmltooling::cleanup<AttributeDesignator>());
 175             for_each(m_SAML2Designators.begin(), m_SAML2Designators.end(), xmltooling::cleanup<saml2::Attribute>());
 176         }
 177
 178         Lockable* lock() {return this;}
 179         void unlock() {}
 180
 181         ResolutionContext* createResolutionContext(
 182             const Application& application,
 183             const EntityDescriptor* issuer,
 184             const XMLCh* protocol,
 185             const NameID* nameid=NULL,
 186             const XMLCh* authncontext_class=NULL,
 187             const XMLCh* authncontext_decl=NULL,
 188             const vector<const opensaml::Assertion*>* tokens=NULL,
 189             const vector<shibsp::Attribute*>* attributes=NULL
 190             ) const {
 191             return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens,attributes);
 192         }
 193
 194         ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
 195             return new QueryContext(application,session);
 196         }
 197
 198         void resolveAttributes(ResolutionContext& ctx) const;
 199
 200         void getAttributeIds(vector<string>& attributes) const {
 201             // Nothing to do, only the extractor would actually generate them.
 202         }
 203
 204     private:
 205         bool SAML1Query(QueryContext& ctx) const;
 206         bool SAML2Query(QueryContext& ctx) 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 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver"))
 221 {
 222 #ifdef _DEBUG
 223     xmltooling::NDC ndc("QueryResolver");
 224 #endif
 225
 226     DOMElement* child = XMLHelper::getFirstChildElement(e);
 227     while (child) {
 228         try {
 229             if (XMLHelper::isNodeNamed(e, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
 230                 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
 231                 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
 232                 if (down) {
 233                     m_SAML2Designators.push_back(down);
 234                     obj.release();
 235                 }
 236             }
 237             else if (XMLHelper::isNodeNamed(e, samlconstants::SAML1P_NS, AttributeDesignator::LOCAL_NAME)) {
 238                 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
 239                 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
 240                 if (down) {
 241                     m_SAML1Designators.push_back(down);
 242                     obj.release();
 243                 }
 244             }
 245         }
 246         catch (exception& ex) {
 247             m_log.error("exception loading attribute designator: %s", ex.what());
 248         }
 249         child = XMLHelper::getNextSiblingElement(child);
 250     }
 251 }
 252
 253 bool QueryResolver::SAML1Query(QueryContext& ctx) const
 254 {
 255 #ifdef _DEBUG
 256     xmltooling::NDC ndc("query");
 257 #endif
 258
 259     int version = XMLString::equals(ctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ? 1 : 0;
 260     const AttributeAuthorityDescriptor* AA =
 261         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(ctx.getProtocol()));
 262     if (!AA) {
 263         m_log.warn("no SAML 1.%d AttributeAuthority role found in metadata", version);
 264         return false;
 265     }
 266
 267     const Application& application = ctx.getApplication();
 268     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 269     shibsp::SecurityPolicy policy(application);
 270     MetadataCredentialCriteria mcc(*AA);
 271     shibsp::SOAPClient soaper(policy);
 272
 273     auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
 274     saml1p::Response* response=NULL;
 275     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 276     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
 277         if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 278             continue;
 279         auto_ptr_char loc((*ep)->getLocation());
 280         try {
 281             NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
 282             nameid->setName(ctx.getNameID()->getName());
 283             nameid->setFormat(ctx.getNameID()->getFormat());
 284             nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
 285             saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
 286             subject->setNameIdentifier(nameid);
 287             saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
 288             query->setSubject(subject);
 289             query->setResource(relyingParty->getXMLString("entityID").second);
 290             for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
 291                 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
 292             Request* request = RequestBuilder::buildRequest();
 293             request->setAttributeQuery(query);
 294             request->setMinorVersion(version);
 295
 296             SAML1SOAPClient client(soaper, false);
 297             client.sendSAML(request, application.getId(), mcc, loc.get());
 298             response = client.receiveSAML();
 299         }
 300         catch (exception& ex) {
 301             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 302             soaper.reset();
 303         }
 304     }
 305
 306     if (!response) {
 307         m_log.error("unable to obtain a SAML response from attribute authority");
 308         return false;
 309     }
 310     else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==NULL ||
 311             *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
 312         delete response;
 313         m_log.error("attribute authority returned a SAML error");
 314         return true;
 315     }
 316
 317     const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
 318     if (assertions.empty()) {
 319         delete response;
 320         m_log.warn("response from attribute authority was empty");
 321         return true;
 322     }
 323     else if (assertions.size()>1)
 324         m_log.warn("simple resolver only supports one assertion in the query response");
 325
 326     auto_ptr<saml1p::Response> wrapper(response);
 327     saml1::Assertion* newtoken = assertions.front();
 328
 329     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 330     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 331         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 332         return true;
 333     }
 334
 335     try {
 336         // We're going to insist that the assertion issuer is the same as the peer.
 337         // Reset the policy's message bits and extract them from the assertion.
 338         policy.reset(true);
 339         policy.setMessageID(newtoken->getAssertionID());
 340         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 341         policy.setIssuer(newtoken->getIssuer());
 342         policy.evaluate(*newtoken);
 343
 344         // Now we can check the security status of the policy.
 345         if (!policy.isAuthenticated())
 346             throw SecurityPolicyException("Security of SAML 1.x query result not established.");
 347
 348         // Lastly, check it over.
 349         saml1::AssertionValidator tokval(relyingParty->getXMLString("entityID").second, application.getAudiences(), time(NULL));
 350         tokval.validateAssertion(*newtoken);
 351     }
 352     catch (exception& ex) {
 353         m_log.error("assertion failed policy/validation: %s", ex.what());
 354         return true;
 355     }
 356
 357     newtoken->detach();
 358     wrapper.release();
 359     ctx.getResolvedAssertions().push_back(newtoken);
 360
 361     // Finally, extract and filter the result.
 362     try {
 363         AttributeExtractor* extractor = application.getAttributeExtractor();
 364         if (extractor) {
 365             Locker extlocker(extractor);
 366             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 367         }
 368
 369         AttributeFilter* filter = application.getAttributeFilter();
 370         if (filter) {
 371             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 372             Locker filtlocker(filter);
 373             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 374         }
 375     }
 376     catch (exception& ex) {
 377         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 378         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 379         ctx.getResolvedAttributes().clear();
 380     }
 381
 382     return true;
 383 }
 384
 385 bool QueryResolver::SAML2Query(QueryContext& ctx) const
 386 {
 387 #ifdef _DEBUG
 388     xmltooling::NDC ndc("query");
 389 #endif
 390
 391     const AttributeAuthorityDescriptor* AA =
 392         find_if(ctx.getEntityDescriptor()->getAttributeAuthorityDescriptors(), isValidForProtocol(samlconstants::SAML20P_NS));
 393     if (!AA) {
 394         m_log.warn("no SAML 2 AttributeAuthority role found in metadata");
 395         return false;
 396     }
 397
 398     const Application& application = ctx.getApplication();
 399     shibsp::SecurityPolicy policy(application);
 400     MetadataCredentialCriteria mcc(*AA);
 401     shibsp::SOAPClient soaper(policy);
 402
 403     const PropertySet* relyingParty = application.getRelyingParty(ctx.getEntityDescriptor());
 404     pair<bool,bool> signedAssertions = relyingParty->getBool("requireSignedAssertions");
 405     pair<bool,const char*> encryption = relyingParty->getString("encryption");
 406
 407     auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
 408     saml2p::StatusResponseType* srt=NULL;
 409     const vector<AttributeService*>& endpoints=AA->getAttributeServices();
 410     for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
 411         if (!XMLString::equals((*ep)->getBinding(),binding.get()))
 412             continue;
 413         auto_ptr_char loc((*ep)->getLocation());
 414         try {
 415             auto_ptr<saml2::Subject> subject(saml2::SubjectBuilder::buildSubject());
 416
 417             // Encrypt the NameID?
 418             if (encryption.first && (!strcmp(encryption.second, "true") || !strcmp(encryption.second, "back"))) {
 419                 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
 420                 MetadataCredentialCriteria mcc(*AA);
 421                 encrypted->encrypt(
 422                     *ctx.getNameID(),
 423                     *(application.getMetadataProvider()),
 424                     mcc,
 425                     false,
 426                     relyingParty->getXMLString("encryptionAlg").second
 427                     );
 428                 subject->setEncryptedID(encrypted.release());
 429             }
 430             else {
 431                 subject->setNameID(ctx.getNameID()->cloneNameID());
 432             }
 433
 434             saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
 435             query->setSubject(subject.release());
 436             Issuer* iss = IssuerBuilder::buildIssuer();
 437             iss->setName(relyingParty->getXMLString("entityID").second);
 438             query->setIssuer(iss);
 439             for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
 440                 query->getAttributes().push_back((*ad)->cloneAttribute());
 441
 442             SAML2SOAPClient client(soaper, false);
 443             client.sendSAML(query, application.getId(), mcc, loc.get());
 444             srt = client.receiveSAML();
 445         }
 446         catch (exception& ex) {
 447             m_log.error("exception during SAML query to %s: %s", loc.get(), ex.what());
 448             soaper.reset();
 449         }
 450     }
 451
 452     if (!srt) {
 453         m_log.error("unable to obtain a SAML response from attribute authority");
 454         return false;
 455     }
 456     saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
 457     if (!response) {
 458         delete srt;
 459         m_log.error("message was not a samlp:Response");
 460         return true;
 461     }
 462     else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
 463             !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
 464         delete srt;
 465         m_log.error("attribute authority returned a SAML error");
 466         return true;
 467     }
 468
 469     const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
 470     if (assertions.empty()) {
 471         delete srt;
 472         m_log.warn("response from attribute authority was empty");
 473         return true;
 474     }
 475     else if (assertions.size()>1)
 476         m_log.warn("simple resolver only supports one assertion in the query response");
 477
 478     auto_ptr<saml2p::StatusResponseType> wrapper(srt);
 479     saml2::Assertion* newtoken = assertions.front();
 480
 481     if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
 482         m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
 483         return true;
 484     }
 485
 486     try {
 487         // We're going to insist that the assertion issuer is the same as the peer.
 488         // Reset the policy's message bits and extract them from the assertion.
 489         policy.reset(true);
 490         policy.setMessageID(newtoken->getID());
 491         policy.setIssueInstant(newtoken->getIssueInstantEpoch());
 492         policy.setIssuer(newtoken->getIssuer());
 493         policy.evaluate(*newtoken);
 494
 495         // Now we can check the security status of the policy.
 496         if (!policy.isAuthenticated())
 497             throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
 498
 499         // Lastly, check it over.
 500         saml2::AssertionValidator tokval(relyingParty->getXMLString("entityID").second, application.getAudiences(), time(NULL));
 501         tokval.validateAssertion(*newtoken);
 502     }
 503     catch (exception& ex) {
 504         m_log.error("assertion failed policy/validation: %s", ex.what());
 505         return true;
 506     }
 507
 508     newtoken->detach();
 509     wrapper.release();
 510     ctx.getResolvedAssertions().push_back(newtoken);
 511
 512     // Finally, extract and filter the result.
 513     try {
 514         AttributeExtractor* extractor = application.getAttributeExtractor();
 515         if (extractor) {
 516             Locker extlocker(extractor);
 517             extractor->extractAttributes(application, AA, *newtoken, ctx.getResolvedAttributes());
 518         }
 519
 520         AttributeFilter* filter = application.getAttributeFilter();
 521         if (filter) {
 522             BasicFilteringContext fc(application, ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
 523             Locker filtlocker(filter);
 524             filter->filterAttributes(fc, ctx.getResolvedAttributes());
 525         }
 526     }
 527     catch (exception& ex) {
 528         m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
 529         for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), xmltooling::cleanup<shibsp::Attribute>());
 530         ctx.getResolvedAttributes().clear();
 531     }
 532
 533     return true;
 534 }
 535
 536 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
 537 {
 538 #ifdef _DEBUG
 539     xmltooling::NDC ndc("resolveAttributes");
 540 #endif
 541
 542     QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
 543     if (!qctx.doQuery()) {
 544         m_log.debug("found AttributeStatement in input to new session, skipping query");
 545         return;
 546     }
 547
 548     if (qctx.getNameID() && qctx.getEntityDescriptor()) {
 549         if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML20P_NS)) {
 550             m_log.debug("attempting SAML 2.0 attribute query");
 551             SAML2Query(qctx);
 552         }
 553         else if (XMLString::equals(qctx.getProtocol(), samlconstants::SAML11_PROTOCOL_ENUM) ||
 554                 XMLString::equals(qctx.getProtocol(), samlconstants::SAML10_PROTOCOL_ENUM)) {
 555             m_log.debug("attempting SAML 1.x attribute query");
 556             SAML1Query(qctx);
 557         }
 558         else
 559             m_log.warn("SSO protocol does not allow for attribute query");
 560     }
 561     else
 562         m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");
 563 }