2 * Copyright 2001-2007 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
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14 * limitations under the License.
18 * QueryAttributeResolver.cpp
20 * AttributeResolver based on SAML queries.
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"
36 #include <log4cpp/Category.hh>
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>
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 log4cpp;
65 class SHIBSP_DLLLOCAL QueryContext : public ResolutionContext
68 QueryContext(const Application& application, const Session& session)
69 : m_query(true), m_app(application), m_session(&session), m_metadata(NULL), m_entity(NULL), m_nameid(NULL) {
70 m_protocol = XMLString::transcode(session.getProtocol());
71 m_class = XMLString::transcode(session.getAuthnContextClassRef());
72 m_decl = XMLString::transcode(session.getAuthnContextDeclRef());
76 const Application& application,
77 const EntityDescriptor* issuer,
78 const XMLCh* protocol,
80 const XMLCh* authncontext_class=NULL,
81 const XMLCh* authncontext_decl=NULL,
82 const vector<const opensaml::Assertion*>* tokens=NULL,
83 const multimap<string,Attribute*>* attributes=NULL
84 ) : m_query(true), m_app(application), m_session(NULL), m_metadata(NULL), m_entity(issuer),
85 m_protocol(protocol), m_nameid(nameid), m_class(authncontext_class), m_decl(authncontext_decl) {
88 for (vector<const opensaml::Assertion*>::const_iterator t = tokens->begin(); t!=tokens->end(); ++t) {
89 const saml2::Assertion* token2 = dynamic_cast<const saml2::Assertion*>(*t);
90 if (token2 && !token2->getAttributeStatements().empty()) {
94 const saml1::Assertion* token1 = dynamic_cast<const saml1::Assertion*>(*t);
95 if (token1 && !token1->getAttributeStatements().empty()) {
105 XMLString::release((XMLCh**)&m_protocol);
106 XMLString::release((XMLCh**)&m_class);
107 XMLString::release((XMLCh**)&m_decl);
110 m_metadata->unlock();
111 for_each(m_attributes.begin(), m_attributes.end(), cleanup_pair<string,shibsp::Attribute>());
112 for_each(m_assertions.begin(), m_assertions.end(), xmltooling::cleanup<opensaml::Assertion>());
115 bool doQuery() const {
119 const Application& getApplication() const {
122 const EntityDescriptor* getEntityDescriptor() const {
125 if (m_session && m_session->getEntityID()) {
126 m_metadata = m_app.getMetadataProvider();
129 return m_entity = m_metadata->getEntityDescriptor(m_session->getEntityID());
134 const XMLCh* getProtocol() const {
137 const NameID* getNameID() const {
138 return m_session ? m_session->getNameID() : m_nameid;
140 const XMLCh* getClassRef() const {
143 const XMLCh* getDeclRef() const {
146 const Session* getSession() const {
149 multimap<string,shibsp::Attribute*>& getResolvedAttributes() {
152 vector<opensaml::Assertion*>& getResolvedAssertions() {
158 const Application& m_app;
159 const Session* m_session;
160 mutable MetadataProvider* m_metadata;
161 mutable const EntityDescriptor* m_entity;
162 const XMLCh* m_protocol;
163 const NameID* m_nameid;
164 const XMLCh* m_class;
166 multimap<string,shibsp::Attribute*> m_attributes;
167 vector<opensaml::Assertion*> m_assertions;
170 class SHIBSP_DLLLOCAL QueryResolver : public AttributeResolver
173 QueryResolver(const DOMElement* e);
175 for_each(m_SAML1Designators.begin(), m_SAML1Designators.end(), xmltooling::cleanup<AttributeDesignator>());
176 for_each(m_SAML2Designators.begin(), m_SAML2Designators.end(), xmltooling::cleanup<saml2::Attribute>());
179 Lockable* lock() {return this;}
182 ResolutionContext* createResolutionContext(
183 const Application& application,
184 const EntityDescriptor* issuer,
185 const XMLCh* protocol,
186 const NameID* nameid,
187 const XMLCh* authncontext_class=NULL,
188 const XMLCh* authncontext_decl=NULL,
189 const vector<const opensaml::Assertion*>* tokens=NULL,
190 const multimap<string,shibsp::Attribute*>* attributes=NULL
192 return new QueryContext(application,issuer,protocol,nameid,authncontext_class,authncontext_decl,tokens,attributes);
195 ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
196 return new QueryContext(application,session);
199 void resolveAttributes(ResolutionContext& ctx) const;
201 void getAttributeIds(vector<string>& attributes) const {
202 // Nothing to do, only the extractor would actually generate them.
206 bool SAML1Query(QueryContext& ctx) const;
207 bool SAML2Query(QueryContext& ctx) const;
210 vector<AttributeDesignator*> m_SAML1Designators;
211 vector<saml2::Attribute*> m_SAML2Designators;
214 AttributeResolver* SHIBSP_DLLLOCAL QueryResolverFactory(const DOMElement* const & e)
216 return new QueryResolver(e);
221 void SHIBSP_API shibsp::registerAttributeResolvers()
223 SPConfig::getConfig().AttributeResolverManager.registerFactory(QUERY_ATTRIBUTE_RESOLVER, QueryResolverFactory);
226 QueryResolver::QueryResolver(const DOMElement* e) : m_log(Category::getInstance(SHIBSP_LOGCAT".AttributeResolver"))
229 xmltooling::NDC ndc("QueryResolver");
232 DOMElement* child = XMLHelper::getFirstChildElement(e);
235 if (XMLHelper::isNodeNamed(e, samlconstants::SAML20_NS, saml2::Attribute::LOCAL_NAME)) {
236 auto_ptr<XMLObject> obj(saml2::AttributeBuilder::buildOneFromElement(child));
237 saml2::Attribute* down = dynamic_cast<saml2::Attribute*>(obj.get());
239 m_SAML2Designators.push_back(down);
243 else if (XMLHelper::isNodeNamed(e, samlconstants::SAML1P_NS, AttributeDesignator::LOCAL_NAME)) {
244 auto_ptr<XMLObject> obj(AttributeDesignatorBuilder::buildOneFromElement(child));
245 AttributeDesignator* down = dynamic_cast<AttributeDesignator*>(obj.get());
247 m_SAML1Designators.push_back(down);
252 catch (exception& ex) {
253 m_log.error("exception loading attribute designator: %s", ex.what());
255 child = XMLHelper::getNextSiblingElement(child);
259 bool QueryResolver::SAML1Query(QueryContext& ctx) const
262 xmltooling::NDC ndc("query");
266 const AttributeAuthorityDescriptor* AA = ctx.getEntityDescriptor()->getAttributeAuthorityDescriptor(samlconstants::SAML11_PROTOCOL_ENUM);
268 AA = ctx.getEntityDescriptor()->getAttributeAuthorityDescriptor(samlconstants::SAML10_PROTOCOL_ENUM);
272 m_log.debug("no SAML 1.x AttributeAuthority role found in metadata");
276 shibsp::SecurityPolicy policy(ctx.getApplication());
277 MetadataCredentialCriteria mcc(*AA);
278 shibsp::SOAPClient soaper(policy);
279 const PropertySet* policySettings =
280 ctx.getApplication().getServiceProvider().getPolicySettings(ctx.getApplication().getString("policyId").second);
281 pair<bool,bool> signedAssertions = policySettings->getBool("signedAssertions");
283 auto_ptr_XMLCh binding(samlconstants::SAML1_BINDING_SOAP);
284 saml1p::Response* response=NULL;
285 const vector<AttributeService*>& endpoints=AA->getAttributeServices();
286 for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !response && ep!=endpoints.end(); ++ep) {
288 if (!XMLString::equals((*ep)->getBinding(),binding.get()))
290 auto_ptr_char loc((*ep)->getLocation());
291 auto_ptr_XMLCh issuer(ctx.getApplication().getString("entityID").second);
292 NameIdentifier* nameid = NameIdentifierBuilder::buildNameIdentifier();
293 nameid->setName(ctx.getNameID()->getName());
294 nameid->setFormat(ctx.getNameID()->getFormat());
295 nameid->setNameQualifier(ctx.getNameID()->getNameQualifier());
296 saml1::Subject* subject = saml1::SubjectBuilder::buildSubject();
297 subject->setNameIdentifier(nameid);
298 saml1p::AttributeQuery* query = saml1p::AttributeQueryBuilder::buildAttributeQuery();
299 query->setSubject(subject);
300 query->setResource(issuer.get());
301 for (vector<AttributeDesignator*>::const_iterator ad = m_SAML1Designators.begin(); ad!=m_SAML1Designators.end(); ++ad)
302 query->getAttributeDesignators().push_back((*ad)->cloneAttributeDesignator());
303 Request* request = RequestBuilder::buildRequest();
304 request->setAttributeQuery(query);
305 request->setMinorVersion(version);
307 SAML1SOAPClient client(soaper, false);
308 client.sendSAML(request, mcc, loc.get());
309 response = client.receiveSAML();
311 catch (exception& ex) {
312 m_log.error("exception making SAML query: %s", ex.what());
318 m_log.error("unable to obtain a SAML response from attribute authority");
321 else if (!response->getStatus() || !response->getStatus()->getStatusCode() || response->getStatus()->getStatusCode()->getValue()==NULL ||
\r
322 *(response->getStatus()->getStatusCode()->getValue()) != saml1p::StatusCode::SUCCESS) {
\r
324 m_log.error("attribute authority returned a SAML error");
\r
328 const vector<saml1::Assertion*>& assertions = const_cast<const saml1p::Response*>(response)->getAssertions();
329 if (assertions.size()>1)
330 m_log.warn("simple resolver only supports one assertion in the query response");
332 auto_ptr<saml1p::Response> wrapper(response);
333 saml1::Assertion* newtoken = assertions.front();
335 if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
336 m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
341 policy.evaluate(*newtoken);
342 if (!policy.isSecure())
343 throw SecurityPolicyException("Security of SAML 1.x query result not established.");
344 saml1::AssertionValidator tokval(ctx.getApplication().getAudiences(), time(NULL));
345 tokval.validateAssertion(*newtoken);
347 catch (exception& ex) {
348 m_log.error("assertion failed policy/validation: %s", ex.what());
354 ctx.getResolvedAssertions().push_back(newtoken);
356 // Finally, extract and filter the result.
358 AttributeExtractor* extractor = ctx.getApplication().getAttributeExtractor();
360 Locker extlocker(extractor);
361 extractor->extractAttributes(ctx.getApplication(), AA, *newtoken, ctx.getResolvedAttributes());
364 AttributeFilter* filter = ctx.getApplication().getAttributeFilter();
366 BasicFilteringContext fc(ctx.getApplication(), ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
367 Locker filtlocker(filter);
368 filter->filterAttributes(fc, ctx.getResolvedAttributes());
371 catch (exception& ex) {
372 m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
373 for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), cleanup_pair<string,shibsp::Attribute>());
374 ctx.getResolvedAttributes().clear();
380 bool QueryResolver::SAML2Query(QueryContext& ctx) const
383 xmltooling::NDC ndc("query");
386 const AttributeAuthorityDescriptor* AA = ctx.getEntityDescriptor()->getAttributeAuthorityDescriptor(samlconstants::SAML20P_NS);
388 m_log.debug("no SAML 2 AttributeAuthority role found in metadata");
392 shibsp::SecurityPolicy policy(ctx.getApplication());
393 MetadataCredentialCriteria mcc(*AA);
394 shibsp::SOAPClient soaper(policy);
395 const PropertySet* policySettings =
396 ctx.getApplication().getServiceProvider().getPolicySettings(ctx.getApplication().getString("policyId").second);
397 pair<bool,bool> signedAssertions = policySettings->getBool("signedAssertions");
399 auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
400 saml2p::StatusResponseType* srt=NULL;
401 const vector<AttributeService*>& endpoints=AA->getAttributeServices();
402 for (vector<AttributeService*>::const_iterator ep=endpoints.begin(); !srt && ep!=endpoints.end(); ++ep) {
404 if (!XMLString::equals((*ep)->getBinding(),binding.get()))
406 auto_ptr_char loc((*ep)->getLocation());
407 auto_ptr_XMLCh issuer(ctx.getApplication().getString("entityID").second);
408 saml2::Subject* subject = saml2::SubjectBuilder::buildSubject();
409 subject->setNameID(ctx.getNameID()->cloneNameID());
410 saml2p::AttributeQuery* query = saml2p::AttributeQueryBuilder::buildAttributeQuery();
411 query->setSubject(subject);
412 Issuer* iss = IssuerBuilder::buildIssuer();
413 iss->setName(issuer.get());
414 query->setIssuer(iss);
415 for (vector<saml2::Attribute*>::const_iterator ad = m_SAML2Designators.begin(); ad!=m_SAML2Designators.end(); ++ad)
416 query->getAttributes().push_back((*ad)->cloneAttribute());
418 SAML2SOAPClient client(soaper, false);
419 client.sendSAML(query, mcc, loc.get());
420 srt = client.receiveSAML();
422 catch (exception& ex) {
423 m_log.error("exception making SAML query: %s", ex.what());
429 m_log.error("unable to obtain a SAML response from attribute authority");
432 saml2p::Response* response = dynamic_cast<saml2p::Response*>(srt);
435 m_log.error("message was not a samlp:Response");
438 else if (!response->getStatus() || !response->getStatus()->getStatusCode() ||
439 !XMLString::equals(response->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
441 m_log.error("attribute authority returned a SAML error");
445 const vector<saml2::Assertion*>& assertions = const_cast<const saml2p::Response*>(response)->getAssertions();
446 if (assertions.size()>1)
447 m_log.warn("simple resolver only supports one assertion in the query response");
449 auto_ptr<saml2p::Response> wrapper(response);
450 saml2::Assertion* newtoken = assertions.front();
452 if (!newtoken->getSignature() && signedAssertions.first && signedAssertions.second) {
453 m_log.error("assertion unsigned, rejecting it based on signedAssertions policy");
458 policy.evaluate(*newtoken);
459 if (!policy.isSecure())
460 throw SecurityPolicyException("Security of SAML 2.0 query result not established.");
461 saml2::AssertionValidator tokval(ctx.getApplication().getAudiences(), time(NULL));
462 tokval.validateAssertion(*newtoken);
464 catch (exception& ex) {
465 m_log.error("assertion failed policy/validation: %s", ex.what());
471 ctx.getResolvedAssertions().push_back(newtoken);
473 // Finally, extract and filter the result.
475 AttributeExtractor* extractor = ctx.getApplication().getAttributeExtractor();
477 Locker extlocker(extractor);
478 extractor->extractAttributes(ctx.getApplication(), AA, *newtoken, ctx.getResolvedAttributes());
481 AttributeFilter* filter = ctx.getApplication().getAttributeFilter();
483 BasicFilteringContext fc(ctx.getApplication(), ctx.getResolvedAttributes(), AA, ctx.getClassRef(), ctx.getDeclRef());
484 Locker filtlocker(filter);
485 filter->filterAttributes(fc, ctx.getResolvedAttributes());
488 catch (exception& ex) {
489 m_log.error("caught exception extracting/filtering attributes from query result: %s", ex.what());
490 for_each(ctx.getResolvedAttributes().begin(), ctx.getResolvedAttributes().end(), cleanup_pair<string,shibsp::Attribute>());
491 ctx.getResolvedAttributes().clear();
497 void QueryResolver::resolveAttributes(ResolutionContext& ctx) const
500 xmltooling::NDC ndc("resolveAttributes");
503 QueryContext& qctx = dynamic_cast<QueryContext&>(ctx);
504 if (!qctx.doQuery()) {
505 m_log.debug("found AttributeStatement in input to new session, skipping query");
509 if (qctx.getNameID() && qctx.getEntityDescriptor()) {
510 m_log.debug("attempting SAML 2.0 attribute query");
511 if (SAML2Query(qctx))
513 m_log.debug("attempting SAML 1.x attribute query");
517 m_log.warn("can't attempt attribute query, either no NameID or no metadata to use");