2 * Copyright 2001-2009 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.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 * ChainingMetadataProvider.cpp
20 * MetadataProvider that uses multiple providers in sequence.
24 #include "exceptions.h"
25 #include "saml/binding/SAMLArtifact.h"
26 #include "saml2/metadata/ObservableMetadataProvider.h"
27 #include "saml2/metadata/MetadataCredentialCriteria.h"
30 #include <xercesc/util/XMLUniDefs.hpp>
31 #include <xmltooling/logging.h>
32 #include <xmltooling/util/XMLHelper.h>
35 using namespace opensaml::saml2md;
36 using namespace opensaml;
37 using namespace xmlsignature;
38 using namespace xmltooling::logging;
39 using namespace xmltooling;
45 // per-thread structure allocated to track locks and role->provider mappings
46 struct SAML_DLLLOCAL tracker_t;
48 class SAML_DLLLOCAL ChainingMetadataProvider
49 : public ObservableMetadataProvider, public ObservableMetadataProvider::Observer {
51 ChainingMetadataProvider(const xercesc::DOMElement* e=NULL);
52 virtual ~ChainingMetadataProvider();
54 using MetadataProvider::getEntityDescriptor;
55 using MetadataProvider::getEntitiesDescriptor;
60 const XMLObject* getMetadata() const;
61 const EntitiesDescriptor* getEntitiesDescriptor(const char* name, bool requireValidMetadata=true) const;
62 pair<const EntityDescriptor*,const RoleDescriptor*> getEntityDescriptor(const Criteria& criteria) const;
63 void onEvent(const ObservableMetadataProvider& provider) const;
65 const Credential* resolve(const CredentialCriteria* criteria=NULL) const;
66 vector<const Credential*>::size_type resolve(vector<const Credential*>& results, const CredentialCriteria* criteria=NULL) const;
70 mutable Mutex* m_trackerLock;
72 vector<MetadataProvider*> m_providers;
73 mutable set<tracker_t*> m_trackers;
74 static void tracker_cleanup(void*);
76 friend struct tracker_t;
79 struct SAML_DLLLOCAL tracker_t {
80 tracker_t(const ChainingMetadataProvider* m) : m_metadata(m) {
81 Lock lock(m_metadata->m_trackerLock);
82 m_metadata->m_trackers.insert(this);
85 void lock_if(MetadataProvider* m) {
86 if (m_locked.count(m) == 0)
90 void unlock_if(MetadataProvider* m) {
91 if (m_locked.count(m) == 0)
95 void remember(MetadataProvider* m, const EntityDescriptor* entity=NULL) {
98 m_objectMap.insert(pair<const XMLObject*,const MetadataProvider*>(entity,m));
101 const MetadataProvider* getProvider(const RoleDescriptor& role) {
102 map<const XMLObject*,const MetadataProvider*>::const_iterator i = m_objectMap.find(role.getParent());
103 return (i != m_objectMap.end()) ? i->second : NULL;
106 const ChainingMetadataProvider* m_metadata;
107 set<MetadataProvider*> m_locked;
108 map<const XMLObject*,const MetadataProvider*> m_objectMap;
111 MetadataProvider* SAML_DLLLOCAL ChainingMetadataProviderFactory(const DOMElement* const & e)
113 return new ChainingMetadataProvider(e);
116 static const XMLCh _MetadataProvider[] = UNICODE_LITERAL_16(M,e,t,a,d,a,t,a,P,r,o,v,i,d,e,r);
117 static const XMLCh precedence[] = UNICODE_LITERAL_10(p,r,e,c,e,d,e,n,c,e);
118 static const XMLCh last[] = UNICODE_LITERAL_4(l,a,s,t);
119 static const XMLCh _type[] = UNICODE_LITERAL_4(t,y,p,e);
123 void ChainingMetadataProvider::tracker_cleanup(void* ptr)
126 // free the tracker after removing it from the parent plugin's tracker set
127 tracker_t* t = reinterpret_cast<tracker_t*>(ptr);
128 Lock lock(t->m_metadata->m_trackerLock);
129 t->m_metadata->m_trackers.erase(t);
134 ChainingMetadataProvider::ChainingMetadataProvider(const DOMElement* e)
135 : ObservableMetadataProvider(e), m_firstMatch(true), m_trackerLock(NULL), m_tlsKey(NULL),
136 m_log(Category::getInstance(SAML_LOGCAT".Metadata.Chaining"))
138 if (XMLString::equals(e ? e->getAttributeNS(NULL, precedence) : NULL, last))
139 m_firstMatch = false;
141 e = e ? XMLHelper::getFirstChildElement(e, _MetadataProvider) : NULL;
143 auto_ptr_char temp(e->getAttributeNS(NULL, _type));
144 if (temp.get() && *temp.get()) {
146 m_log.info("building MetadataProvider of type %s", temp.get());
147 auto_ptr<MetadataProvider> provider(SAMLConfig::getConfig().MetadataProviderManager.newPlugin(temp.get(), e));
148 ObservableMetadataProvider* obs = dynamic_cast<ObservableMetadataProvider*>(provider.get());
150 obs->addObserver(this);
151 m_providers.push_back(provider.get());
154 catch (exception& ex) {
155 m_log.error("error building MetadataProvider: %s", ex.what());
158 e = XMLHelper::getNextSiblingElement(e, _MetadataProvider);
160 m_trackerLock = Mutex::create();
161 m_tlsKey = ThreadKey::create(tracker_cleanup);
164 ChainingMetadataProvider::~ChainingMetadataProvider()
167 delete m_trackerLock;
168 for_each(m_trackers.begin(), m_trackers.end(), xmltooling::cleanup<tracker_t>());
169 for_each(m_providers.begin(), m_providers.end(), xmltooling::cleanup<MetadataProvider>());
172 void ChainingMetadataProvider::onEvent(const ObservableMetadataProvider& provider) const
177 void ChainingMetadataProvider::init()
179 for (vector<MetadataProvider*>::const_iterator i=m_providers.begin(); i!=m_providers.end(); ++i) {
183 catch (exception& ex) {
184 m_log.crit("failure initializing MetadataProvider: %s", ex.what());
189 Lockable* ChainingMetadataProvider::lock()
191 return this; // we're not lockable ourselves...
194 void ChainingMetadataProvider::unlock()
196 // Check for locked providers and remove role mappings.
197 void* ptr=m_tlsKey->getData();
199 tracker_t* t = reinterpret_cast<tracker_t*>(ptr);
200 for_each(t->m_locked.begin(), t->m_locked.end(), mem_fun<void,Lockable>(&Lockable::unlock));
202 t->m_objectMap.clear();
206 const XMLObject* ChainingMetadataProvider::getMetadata() const
208 throw MetadataException("getMetadata operation not implemented on this provider.");
211 const EntitiesDescriptor* ChainingMetadataProvider::getEntitiesDescriptor(const char* name, bool requireValidMetadata) const
213 // Ensure we have a tracker to use.
214 tracker_t* tracker=NULL;
215 void* ptr=m_tlsKey->getData();
217 tracker = reinterpret_cast<tracker_t*>(ptr);
220 tracker = new tracker_t(this);
221 m_tlsKey->setData(tracker);
224 MetadataProvider* held = NULL;
225 const EntitiesDescriptor* ret=NULL;
226 const EntitiesDescriptor* cur=NULL;
227 for (vector<MetadataProvider*>::const_iterator i=m_providers.begin(); i!=m_providers.end(); ++i) {
228 tracker->lock_if(*i);
229 if (cur=(*i)->getEntitiesDescriptor(name,requireValidMetadata)) {
230 // Are we using a first match policy?
232 // Save locked provider.
233 tracker->remember(*i);
237 // Using last match wins. Did we already have one?
239 m_log.warn("found duplicate EntitiesDescriptor (%s), using last matching copy", name);
240 tracker->unlock_if(held);
243 // Save off the latest match.
248 // No match, so just unlock this one and move on.
249 tracker->unlock_if(*i);
253 // Preserve any lock we're holding.
255 tracker->remember(held);
259 pair<const EntityDescriptor*,const RoleDescriptor*> ChainingMetadataProvider::getEntityDescriptor(const Criteria& criteria) const
261 // Ensure we have a tracker to use.
262 tracker_t* tracker=NULL;
263 void* ptr=m_tlsKey->getData();
265 tracker = reinterpret_cast<tracker_t*>(ptr);
268 tracker = new tracker_t(this);
269 m_tlsKey->setData(tracker);
273 MetadataProvider* held = NULL;
274 pair<const EntityDescriptor*,const RoleDescriptor*> ret = pair<const EntityDescriptor*,const RoleDescriptor*>(NULL,NULL);
275 pair<const EntityDescriptor*,const RoleDescriptor*> cur = ret;
276 for (vector<MetadataProvider*>::const_iterator i=m_providers.begin(); i!=m_providers.end(); ++i) {
277 tracker->lock_if(*i);
278 cur = (*i)->getEntityDescriptor(criteria);
281 // We want a role also. Did we find one?
283 // Are we using a first match policy?
285 // We could have an entity-only match from earlier, so unlock it.
287 tracker->unlock_if(held);
288 // Save locked provider and role mapping.
289 tracker->remember(*i, cur.first);
293 // Using last match wins. Did we already have one?
296 // We had a "complete" match, so log it.
297 if (criteria.entityID_ascii) {
298 m_log.warn("found duplicate EntityDescriptor (%s) with role (%s), using last matching copy",
299 criteria.entityID_ascii, criteria.role->toString().c_str());
301 else if (criteria.entityID_unicode) {
302 auto_ptr_char temp(criteria.entityID_unicode);
303 m_log.warn("found duplicate EntityDescriptor (%s) with role (%s), using last matching copy",
304 temp.get(), criteria.role->toString().c_str());
306 else if (criteria.artifact) {
307 m_log.warn("found duplicate EntityDescriptor for artifact source (%s) with role (%s), using last matching copy",
308 criteria.artifact->getSource().c_str(), criteria.role->toString().c_str());
311 tracker->unlock_if(held);
314 // Save off the latest match.
319 // We didn't find the role, so we're going to keep looking,
320 // but save this one if we didn't have the role yet.
322 // We already had a role, so let's stick with that.
323 tracker->unlock_if(*i);
326 // This is at least as good, so toss anything we had and keep it.
328 tracker->unlock_if(held);
335 // Are we using a first match policy?
337 // I don't think this can happen, but who cares, check anyway.
339 tracker->unlock_if(held);
341 // Save locked provider.
342 tracker->remember(*i, cur.first);
346 // Using last match wins. Did we already have one?
348 if (criteria.entityID_ascii) {
349 m_log.warn("found duplicate EntityDescriptor (%s), using last matching copy", criteria.entityID_ascii);
351 else if (criteria.entityID_unicode) {
352 auto_ptr_char temp(criteria.entityID_unicode);
353 m_log.warn("found duplicate EntityDescriptor (%s), using last matching copy", temp.get());
355 else if (criteria.artifact) {
356 m_log.warn("found duplicate EntityDescriptor for artifact source (%s), using last matching copy",
357 criteria.artifact->getSource().c_str());
359 tracker->unlock_if(held);
362 // Save off the latest match.
368 // No match, so just unlock this one and move on.
369 tracker->unlock_if(*i);
373 // Preserve any lock we're holding.
375 tracker->remember(held, ret.first);
379 const Credential* ChainingMetadataProvider::resolve(const CredentialCriteria* criteria) const
381 void* ptr=m_tlsKey->getData();
383 throw MetadataException("No locked MetadataProvider, where did the role object come from?");
384 tracker_t* tracker=reinterpret_cast<tracker_t*>(ptr);
386 const MetadataCredentialCriteria* mcc = dynamic_cast<const MetadataCredentialCriteria*>(criteria);
388 throw MetadataException("Cannot resolve credentials without a MetadataCredentialCriteria object.");
389 const MetadataProvider* m = tracker->getProvider(mcc->getRole());
391 throw MetadataException("No record of corresponding MetadataProvider, where did the role object come from?");
392 return m->resolve(mcc);
395 vector<const Credential*>::size_type ChainingMetadataProvider::resolve(
396 vector<const Credential*>& results, const CredentialCriteria* criteria
399 void* ptr=m_tlsKey->getData();
401 throw MetadataException("No locked MetadataProvider, where did the role object come from?");
402 tracker_t* tracker=reinterpret_cast<tracker_t*>(ptr);
404 const MetadataCredentialCriteria* mcc = dynamic_cast<const MetadataCredentialCriteria*>(criteria);
406 throw MetadataException("Cannot resolve credentials without a MetadataCredentialCriteria object.");
407 const MetadataProvider* m = tracker->getProvider(mcc->getRole());
409 throw MetadataException("No record of corresponding MetadataProvider, where did the role object come from?");
410 return m->resolve(results, mcc);