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52 * shib-ccache.cpp -- SHAR Credential Cache
54 * Originally from mod_shib
55 * Modified by: Derek Atkins <derek@ihtfp.com>
66 #include <shib/shib-threads.h>
68 #include <log4cpp/Category.hh>
73 #ifdef HAVE_LIBDMALLOCXX
78 using namespace log4cpp;
80 using namespace shibboleth;
81 using namespace shibtarget;
83 static const XMLCh cleanupInterval[] =
84 { chLatin_c, chLatin_l, chLatin_e, chLatin_a, chLatin_n, chLatin_u, chLatin_p,
85 chLatin_I, chLatin_n, chLatin_t, chLatin_e, chLatin_r, chLatin_v, chLatin_a, chLatin_l, chNull
87 static const XMLCh cacheTimeout[] =
88 { chLatin_c, chLatin_a, chLatin_c, chLatin_h, chLatin_e,
89 chLatin_T, chLatin_i, chLatin_m, chLatin_e, chLatin_o, chLatin_u, chLatin_t, chNull
91 static const XMLCh AAConnectTimeout[] =
92 { chLatin_A, chLatin_A, chLatin_C, chLatin_o, chLatin_n, chLatin_n, chLatin_e, chLatin_c, chLatin_t,
93 chLatin_T, chLatin_i, chLatin_m, chLatin_e, chLatin_o, chLatin_u, chLatin_t, chNull
95 static const XMLCh AATimeout[] =
96 { chLatin_A, chLatin_A, chLatin_T, chLatin_i, chLatin_m, chLatin_e, chLatin_o, chLatin_u, chLatin_t, chNull };
98 static const XMLCh defaultLifetime[] =
99 { chLatin_d, chLatin_e, chLatin_f, chLatin_a, chLatin_u, chLatin_l, chLatin_t,
100 chLatin_L, chLatin_i, chLatin_f, chLatin_e, chLatin_t, chLatin_i, chLatin_m, chLatin_e, chNull
102 static const XMLCh retryInterval[] =
103 { chLatin_r, chLatin_e, chLatin_t, chLatin_r, chLatin_y,
104 chLatin_I, chLatin_n, chLatin_t, chLatin_e, chLatin_r, chLatin_v, chLatin_a, chLatin_l, chNull
106 static const XMLCh strictValidity[] =
107 { chLatin_s, chLatin_t, chLatin_r, chLatin_i, chLatin_c, chLatin_t,
108 chLatin_V, chLatin_a, chLatin_l, chLatin_i, chLatin_d, chLatin_i, chLatin_t, chLatin_y, chNull
110 static const XMLCh propagateErrors[] =
111 { chLatin_p, chLatin_r, chLatin_o, chLatin_p, chLatin_a, chLatin_g, chLatin_a, chLatin_t, chLatin_e,
112 chLatin_E, chLatin_r, chLatin_r, chLatin_o, chLatin_r, chLatin_s, chNull
115 class InternalCCache;
116 class InternalCCacheEntry : public ISessionCacheEntry
121 const IApplication* application,
122 SAMLAuthenticationStatement* s,
123 const char *client_addr,
124 SAMLResponse* r=NULL,
125 const IRoleDescriptor* source=NULL
127 ~InternalCCacheEntry();
129 void lock() { m_lock->lock(); }
130 void unlock() { m_lock->unlock(); }
132 bool isValid(time_t lifetime, time_t timeout) const;
133 const char* getClientAddress() const { return m_clientAddress.c_str(); }
134 const char* getSerializedStatement() const { return m_statement.c_str(); }
135 const SAMLAuthenticationStatement* getStatement() const { return p_auth; }
137 Iterator<SAMLAssertion*> getAssertions();
138 void preFetch(int prefetch_window);
140 void setCache(InternalCCache *cache) { m_cache = cache; }
141 time_t lastAccess() const { return m_lastAccess; }
143 bool checkApplication(const IApplication* application) { return (m_application_id==application->getId()); }
146 bool responseValid(int slop);
147 void populate(int slop);
148 SAMLResponse* getNewResponse();
151 string m_application_id;
154 string m_clientAddress;
155 time_t m_sessionCreated;
156 time_t m_responseCreated;
157 mutable time_t m_lastAccess;
160 const SAMLNameIdentifier* m_nameid;
161 SAMLAuthenticationStatement* p_auth;
162 SAMLResponse* m_response;
163 InternalCCache *m_cache;
165 log4cpp::Category* log;
169 class InternalCCache : public ISessionCache
172 InternalCCache(const DOMElement* e);
173 virtual ~InternalCCache();
175 void thread_init() {};
176 void thread_end() {};
178 string generateKey() const;
179 ISessionCacheEntry* find(const char* key, const IApplication* application);
181 const char* key, const IApplication* application, SAMLAuthenticationStatement* s, const char *client_addr, SAMLResponse* r=NULL, const IRoleDescriptor* source=NULL
183 void remove(const char* key);
185 InternalCCacheEntry* findi(const char* key);
189 const DOMElement* m_root; // Only valid during initialization
191 map<string,InternalCCacheEntry*> m_hashtable;
193 log4cpp::Category* log;
195 static void* cleanup_fcn(void*); // XXX Assumed an InternalCCache
197 CondWait* shutdown_wait;
198 Thread* cleanup_thread;
200 // extracted config settings
201 unsigned int m_AATimeout,m_AAConnectTimeout;
202 unsigned int m_defaultLifetime,m_retryInterval;
203 bool m_strictValidity,m_propagateErrors;
204 friend class InternalCCacheEntry;
207 IPlugIn* MemoryCacheFactory(const DOMElement* e)
209 return new InternalCCache(e);
212 /******************************************************************************/
213 /* InternalCCache: in memory session cache */
214 /******************************************************************************/
216 InternalCCache::InternalCCache(const DOMElement* e)
217 : m_root(e), m_AATimeout(30), m_AAConnectTimeout(15), m_defaultLifetime(1800), m_retryInterval(300),
218 m_strictValidity(true), m_propagateErrors(false), lock(RWLock::create()),
219 log (&Category::getInstance("shibtarget.InternalCCache"))
221 const XMLCh* tag=m_root->getAttributeNS(NULL,AATimeout);
223 m_AATimeout = XMLString::parseInt(tag);
228 tag=m_root->getAttributeNS(NULL,AAConnectTimeout);
230 m_AAConnectTimeout = XMLString::parseInt(tag);
231 if (!m_AAConnectTimeout)
232 m_AAConnectTimeout=15;
235 tag=m_root->getAttributeNS(NULL,defaultLifetime);
237 m_defaultLifetime = XMLString::parseInt(tag);
238 if (!m_defaultLifetime)
239 m_defaultLifetime=1800;
242 tag=m_root->getAttributeNS(NULL,retryInterval);
244 m_retryInterval = XMLString::parseInt(tag);
245 if (!m_retryInterval)
249 tag=m_root->getAttributeNS(NULL,strictValidity);
250 if (tag && (*tag==chDigit_0 || *tag==chLatin_f))
251 m_strictValidity=false;
253 tag=m_root->getAttributeNS(NULL,propagateErrors);
254 if (tag && (*tag==chDigit_1 || *tag==chLatin_t))
255 m_propagateErrors=true;
257 shutdown_wait = CondWait::create();
259 cleanup_thread = Thread::create(&cleanup_fcn, (void*)this);
262 InternalCCache::~InternalCCache()
264 // Shut down the cleanup thread and let it know...
266 shutdown_wait->signal();
267 cleanup_thread->join(NULL);
269 for (map<string,InternalCCacheEntry*>::iterator i=m_hashtable.begin(); i!=m_hashtable.end(); i++)
272 delete shutdown_wait;
275 string InternalCCache::generateKey() const
282 // assumes a lock is held..
283 InternalCCacheEntry* InternalCCache::findi(const char* key)
285 log->debug("findI: \"%s\"", key);
287 map<string,InternalCCacheEntry*>::const_iterator i=m_hashtable.find(key);
288 if (i==m_hashtable.end()) {
289 log->debug("No Match found");
292 log->debug("Match Found.");
297 ISessionCacheEntry* InternalCCache::find(const char* key, const IApplication* application)
299 log->debug("Find: \"%s\"", key);
300 ReadLock rwlock(lock);
302 InternalCCacheEntry* entry = findi(key);
305 else if (!entry->checkApplication(application)) {
306 log->crit("An application (%s) attempted to access another application's session!", application->getId());
310 // Lock the "database record" for the caller -- they have to unlock the item.
315 void InternalCCache::insert(
316 const char* key, const IApplication* application, SAMLAuthenticationStatement* s, const char* client_addr, SAMLResponse* r, const IRoleDescriptor* source
319 log->debug("caching new entry for application %s: \"%s\"", application->getId(), key);
321 InternalCCacheEntry* entry = new InternalCCacheEntry(key, application, s, client_addr, r, source);
322 entry->setCache(this);
325 m_hashtable[key]=entry;
329 // remove the entry from the database and then destroy the cacheentry
330 void InternalCCache::remove(const char* key)
332 log->debug("removing cache entry \"key\"", key);
334 // lock the cache for writing, which means we know nobody is sitting in find()
337 // grab the entry from the database.
338 ISessionCacheEntry* entry = findi(key);
345 // ok, remove the entry and lock it
346 m_hashtable.erase(key);
347 dynamic_cast<InternalCCacheEntry*>(entry)->lock();
350 // we can release the entry lock because we know we're not in the cache anymore
353 // Now delete the entry
357 void InternalCCache::cleanup()
359 Mutex* mutex = Mutex::create();
360 saml::NDC ndc("InternalCCache::cleanup()");
363 int timeout_life = 0;
365 // Load our configuration details...
366 const XMLCh* tag=m_root->getAttributeNS(NULL,cleanupInterval);
368 rerun_timer = XMLString::parseInt(tag);
370 tag=m_root->getAttributeNS(NULL,cacheTimeout);
372 timeout_life = XMLString::parseInt(tag);
374 if (rerun_timer <= 0)
375 rerun_timer = 300; // rerun every 5 minutes
377 if (timeout_life <= 0)
378 timeout_life = 28800; // timeout after 8 hours
382 log->debug("Cleanup thread started... Run every %d secs; timeout after %d secs",
383 rerun_timer, timeout_life);
385 while (shutdown == false) {
386 shutdown_wait->timedwait(mutex,rerun_timer);
388 if (shutdown == true)
391 log->info("Cleanup thread running...");
393 // Ok, let's run through the cleanup process and clean out
394 // really old sessions. This is a two-pass process. The
395 // first pass is done holding a read-lock while we iterate over
396 // the database. The second pass doesn't need a lock because
397 // the 'deletes' will lock the database.
399 // Pass 1: iterate over the map and find all entries that have not been
401 vector<string> stale_keys;
402 time_t stale = time(NULL) - timeout_life;
405 for (map<string,InternalCCacheEntry*>::iterator i=m_hashtable.begin();
406 i != m_hashtable.end(); i++)
408 // If the last access was BEFORE the stale timeout...
410 time_t last=i->second->lastAccess();
413 stale_keys.push_back(i->first);
417 log->info("deleting %d old items.", stale_keys.size());
419 // Pass 2: walk through the list of stale entries and remove them from
421 for (vector<string>::iterator j = stale_keys.begin(); j != stale_keys.end(); j++) {
423 // Transaction Logging
424 STConfig& stc=static_cast<STConfig&>(ShibTargetConfig::getConfig());
425 stc.getTransactionLog().infoStream() << "Purged expired session from memory (ID: " << j->c_str() << ")";
426 stc.releaseTransactionLog();
430 log->debug("Cleanup thread finished.");
437 void* InternalCCache::cleanup_fcn(void* cache_p)
439 InternalCCache* cache = reinterpret_cast<InternalCCache*>(cache_p);
441 // First, let's block all signals
442 Thread::mask_all_signals();
444 // Now run the cleanup process.
449 /******************************************************************************/
450 /* InternalCCacheEntry: A Credential Cache Entry */
451 /******************************************************************************/
453 InternalCCacheEntry::InternalCCacheEntry(
454 const char* id, const IApplication* application, SAMLAuthenticationStatement *s, const char* client_addr, SAMLResponse* r, const IRoleDescriptor* source
455 ) : m_response(r), m_responseCreated(r ? time(NULL) : 0), m_lastRetry(0),
456 log(&Category::getInstance("shibtarget::InternalCCacheEntry"))
459 log->error("NULL session ID or auth statement");
460 throw SAMLException("InternalCCacheEntry() passed an empty session ID or SAML Statement");
464 m_application_id=application->getId();
466 m_nameid = s->getSubject()->getNameIdentifier();
467 auto_ptr_char d(m_nameid->getNameQualifier());
468 m_originSite = d.get();
470 m_clientAddress = client_addr;
471 m_sessionCreated = m_lastAccess = time(NULL);
476 // Save the serialized version of the auth statement
479 m_statement = os.str();
482 // Run pushed data through the AAP. Note that we could end up with an empty response!
483 Iterator<SAMLAssertion*> assertions=r->getAssertions();
484 for (unsigned long i=0; i < assertions.size();) {
486 AAP::apply(application->getAAPProviders(),*(assertions[i]),source);
489 catch (SAMLException&) {
490 log->info("no statements remain, removing assertion");
491 r->removeAssertion(i);
496 m_lock = Mutex::create();
498 log->info("new session created (ID: %s)", id);
499 if (log->isDebugEnabled()) {
500 auto_ptr_char h(m_nameid->getName());
501 log->debug("Handle: \"%s\", Origin: \"%s\", Address: %s", h.get(), d.get(), client_addr);
505 InternalCCacheEntry::~InternalCCacheEntry()
507 log->debug("deleting session (ID: %s)", m_id.c_str());
513 bool InternalCCacheEntry::isValid(time_t lifetime, time_t timeout) const
515 saml::NDC ndc("isValid");
516 log->debug("testing session (ID: %s) (lifetime=%ld, timeout=%ld)", m_id.c_str(), lifetime, timeout);
517 time_t now=time(NULL);
518 if (lifetime > 0 && now > m_sessionCreated+lifetime) {
519 log->debug("session beyond lifetime (ID: %s)", m_id.c_str());
523 if (timeout > 0 && now-m_lastAccess >= timeout) {
524 log->debug("session timed out (ID: %s)", m_id.c_str());
531 Iterator<SAMLAssertion*> InternalCCacheEntry::getAssertions()
533 saml::NDC ndc("getAssertions");
535 return (m_response) ? m_response->getAssertions() : EMPTY(SAMLAssertion*);
538 void InternalCCacheEntry::preFetch(int prefetch_window)
540 saml::NDC ndc("preFetch");
541 populate(prefetch_window);
544 bool InternalCCacheEntry::responseValid(int slop)
546 saml::NDC ndc("responseValid");
548 log->debug("checking AA response validity");
550 // This is awful, but the XMLDateTime class is truly horrible.
551 time_t now=time(NULL)+slop;
553 struct tm* ptime=gmtime(&now);
556 struct tm* ptime=gmtime_r(&now,&res);
559 strftime(timebuf,32,"%Y-%m-%dT%H:%M:%SZ",ptime);
560 auto_ptr_XMLCh timeptr(timebuf);
561 XMLDateTime curDateTime(timeptr.get());
562 curDateTime.parseDateTime();
565 Iterator<SAMLAssertion*> iter = m_response->getAssertions();
566 while (iter.hasNext()) {
567 SAMLAssertion* assertion = iter.next();
569 log->debug("testing assertion...");
571 const XMLDateTime* thistime = assertion->getNotOnOrAfter();
573 // If there is no time, then just continue and ignore this assertion.
578 auto_ptr_char nowptr(curDateTime.getRawData());
579 auto_ptr_char assnptr(thistime->getRawData());
581 log->debug("comparing now (%s) to %s", nowptr.get(), assnptr.get());
582 int result=XMLDateTime::compareOrder(&curDateTime, thistime);
584 if (result != XMLDateTime::LESS_THAN) {
585 log->debug("nope, not still valid");
590 // If we didn't find any assertions with times, then see if we're
591 // older than the default response lifetime.
593 if ((now - m_responseCreated) > m_cache->m_defaultLifetime) {
594 log->debug("response is beyond default life, so it's invalid");
599 log->debug("yep, response still valid");
603 void InternalCCacheEntry::populate(int slop)
605 saml::NDC ndc("populate");
606 log->debug("populating attributes for session (ID: %s)", m_id.c_str());
608 // Do we have any data cached?
610 // Can we use what we have?
611 if (responseValid(slop))
614 // If we're being strict, dump what we have and reset timestamps.
615 if (m_cache->m_strictValidity) {
616 log->info("strictly enforcing attribute validity, dumping expired data");
624 // Need to try and get a new response.
628 // Transaction Logging
629 STConfig& stc=static_cast<STConfig&>(ShibTargetConfig::getConfig());
630 stc.getTransactionLog().infoStream() <<
631 "Making attribute query for session (ID: " <<
633 ") on (applicationId: " <<
635 ") for principal from (IdP: " <<
638 stc.releaseTransactionLog();
640 SAMLResponse* new_response=getNewResponse();
643 m_response=new_response;
644 m_responseCreated=time(NULL);
646 log->debug("fetched and stored new response");
647 stc.getTransactionLog().infoStream() << "Successful attribute query for session (ID: " << m_id << ")";
648 stc.releaseTransactionLog();
651 catch (SAMLException& e) {
652 if (typeid(e)==typeid(InvalidHandleException) || m_cache->m_propagateErrors)
654 log->warn("suppressed SAML exception caught while trying to fetch attributes");
657 if (m_cache->m_propagateErrors)
659 log->warn("suppressed exception caught while trying to fetch attributes");
663 SAMLResponse* InternalCCacheEntry::getNewResponse()
665 saml::NDC ndc("getNewResponse");
667 // The retryInterval determines how often to poll an AA that might be down.
668 if ((time(NULL) - m_lastRetry) < m_cache->m_retryInterval)
671 log->debug("retry interval exceeded, so trying again");
672 m_lastRetry=time(NULL);
674 log->info("trying to get new attributes for session (ID=%s)", m_id.c_str());
676 // Lookup application for session to get providerId and attributes to request.
677 IConfig* conf=ShibTargetConfig::getConfig().getINI();
679 const IApplication* application=conf->getApplication(m_application_id.c_str());
681 log->crit("unable to locate application for session, deleted?");
682 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to locate application for session, deleted?");
684 pair<bool,const XMLCh*> providerID=application->getXMLString("providerId");
685 if (!providerID.first) {
686 log->crit("unable to determine ProviderID for application, not set?");
687 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to determine ProviderID for application, not set?");
690 // Get signing policies.
691 pair<bool,bool> signRequest=application->getBool("signRequest");
692 pair<bool,bool> signedResponse=application->getBool("signedResponse");
693 pair<bool,bool> signedAssertions=application->getBool("signedAssertions");
695 // Try this request. The binding wrapper class handles most of the details.
696 Metadata m(application->getMetadataProviders());
697 const IEntityDescriptor* site=m.lookup(m_nameid->getNameQualifier());
699 log->error("unable to locate identity provider's metadata during attribute query");
700 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to locate identity provider's metadata during attribute query.");
703 // Try to locate an AA role.
704 const IAttributeAuthorityDescriptor* AA=site->getAttributeAuthorityDescriptor(saml::XML::SAML11_PROTOCOL_ENUM);
706 log->error("unable to locate metadata for identity provider's Attribute Authority");
707 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to locate metadata for identity provider's Attribute Authority.",site);
711 SAMLResponse* response = NULL;
713 // Build a SAML Request....
714 SAMLAttributeQuery* q=new SAMLAttributeQuery(
715 new SAMLSubject(static_cast<SAMLNameIdentifier*>(m_nameid->clone())),
717 application->getAttributeDesignators().clone()
719 auto_ptr<SAMLRequest> req(new SAMLRequest(EMPTY(QName),q));
721 // Sign it? Highly doubtful we'll ever use this, but just for fun...
722 if (signRequest.first && signRequest.second) {
723 Credentials creds(conf->getCredentialsProviders());
724 const ICredResolver* signingCred=creds.lookup(application->getSigningCred(site));
725 req->sign(SIGNATURE_RSA,signingCred->getKey(),signingCred->getCertificates());
728 log->debug("trying to query an AA...");
730 SAMLConfig::SAMLBindingConfig bindconf;
731 bindconf.timeout=m_cache->m_AATimeout;
732 bindconf.conn_timeout=m_cache->m_AAConnectTimeout;
733 ShibBinding binding(application->getRevocationProviders(),application->getTrustProviders(),conf->getCredentialsProviders());
734 response=binding.send(*req,AA,application->getTLSCred(site),application->getAudiences(),p_auth->getBindings(),bindconf);
736 catch (SAMLException& e) {
737 log->error("caught SAML exception during query to AA: %s", e.what());
738 if (typeid(e)==typeid(InvalidHandleException))
742 throw ShibTargetException(SHIBRPC_SAML_EXCEPTION, os.str().c_str(), AA);
745 // See if we got a response.
747 log->error("no response obtained");
748 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to obtain attributes from user's origin site.",AA);
750 else if (signedResponse.first && signedResponse.second && !response->isSigned()) {
752 log->error("unsigned response obtained, but we were told it must be signed.");
753 throw ShibTargetException(SHIBRPC_INTERNAL_ERROR,"Unable to obtain attributes from user's origin site.",AA);
756 // Run it through the AAP. Note that we could end up with an empty response!
757 Iterator<SAMLAssertion*> a=response->getAssertions();
758 for (unsigned long i=0; i < a.size();) {
760 if (signedAssertions.first && signedAssertions.second && !(a[i]->isSigned())) {
761 log->warn("removing unsigned assertion from response, in accordance with signedAssertions policy");
762 response->removeAssertion(i);
765 AAP::apply(application->getAAPProviders(),*(a[i]),AA);
768 catch (SAMLException&) {
769 log->info("no statements remain, removing assertion");
770 response->removeAssertion(i);