2 * Copyright 2001-2007 Internet2
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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18 * RemotedSessionCache.cpp
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20 * SessionCache implementation that delegates to a remoted version.
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23 #include "internal.h"
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24 #include "Application.h"
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25 #include "exceptions.h"
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26 #include "ServiceProvider.h"
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27 #include "SessionCache.h"
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28 #include "attribute/Attribute.h"
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29 #include "remoting/ListenerService.h"
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30 #include "util/SPConstants.h"
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34 #include <log4cpp/Category.hh>
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35 #include <xmltooling/XMLToolingConfig.h>
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36 #include <xmltooling/util/DateTime.h>
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37 #include <xmltooling/util/NDC.h>
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38 #include <xmltooling/util/XMLHelper.h>
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40 using namespace shibsp;
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41 using namespace xmltooling;
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42 using namespace log4cpp;
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43 using namespace std;
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48 class RemotedSession : public virtual Session
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51 RemotedSession(RemotedCache* cache, DDF& obj) : m_version(obj["version"].integer()), m_obj(obj),
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52 m_expires(0), m_lastAccess(time(NULL)), m_cache(cache), m_lock(NULL) {
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53 auto_ptr_XMLCh exp(m_obj["expires"].string());
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55 DateTime iso(exp.get());
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56 iso.parseDateTime();
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57 m_expires = iso.getEpoch();
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60 m_lock = Mutex::create();
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66 for_each(m_attributes.begin(), m_attributes.end(), cleanup_pair<string,Attribute>());
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77 const char* getApplicationID() const {
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78 return m_obj["application_id"].string();
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80 const char* getClientAddress() const {
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81 return m_obj["client_addr"].string();
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83 const char* getEntityID() const {
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84 return m_obj["entity_id"].string();
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86 const char* getAuthnInstant() const {
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87 return m_obj["authn_instant"].string();
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89 const char* getSessionIndex() const {
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90 return m_obj["session_index"].string();
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92 const char* getAuthnContextClassRef() const {
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93 return m_obj["authncontext_class"].string();
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95 const char* getAuthnContextDeclRef() const {
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96 return m_obj["authncontext_decl"].string();
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98 const multimap<string,Attribute*>& getAttributes() const {
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99 if (m_attributes.empty())
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100 unmarshallAttributes();
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101 return m_attributes;
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103 const vector<const char*>& getAssertionIDs() const {
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104 if (m_ids.empty()) {
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105 DDF ids = m_obj["assertions"];
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106 DDF id = ids.first();
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107 while (id.isstring()) {
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108 m_ids.push_back(id.string());
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115 time_t expires() const { return m_expires; }
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116 time_t lastAccess() const { return m_lastAccess; }
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117 void validate(const Application& application, const char* client_addr, time_t timeout, bool local=true);
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120 void unmarshallAttributes() const;
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124 mutable multimap<string,Attribute*> m_attributes;
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125 mutable vector<const char*> m_ids;
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126 time_t m_expires,m_lastAccess;
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127 RemotedCache* m_cache;
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131 class RemotedCache : public SessionCache
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134 RemotedCache(const DOMElement* e);
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137 Session* find(const char* key, const Application& application, const char* client_addr=NULL, time_t timeout=0);
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138 void remove(const char* key, const Application& application, const char* client_addr);
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144 const DOMElement* m_root; // Only valid during initialization
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146 map<string,RemotedSession*> m_hashtable;
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148 void dormant(const char* key);
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149 static void* cleanup_fn(void*);
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151 CondWait* shutdown_wait;
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152 Thread* cleanup_thread;
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155 SessionCache* SHIBSP_DLLLOCAL RemotedCacheFactory(const DOMElement* const & e)
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157 return new RemotedCache(e);
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161 void RemotedSession::unmarshallAttributes() const
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163 Attribute* attribute;
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164 DDF attrs = m_obj["attributes"];
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165 DDF attr = attrs.first();
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166 while (!attr.isnull()) {
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168 attribute = Attribute::unmarshall(attr);
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169 m_attributes.insert(make_pair(attribute->getId(),attribute));
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170 if (m_cache->m_log.isDebugEnabled())
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171 m_cache->m_log.debug("unmarshalled attribute (ID: %s) with %d value%s",
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172 attribute->getId(), attr.first().integer(), attr.first().integer()!=1 ? "s" : "");
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174 catch (AttributeException& ex) {
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175 const char* id = attr.first().name();
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176 m_cache->m_log.error("error unmarshalling attribute (ID: %s): %s", id ? id : "none", ex.what());
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178 attr = attrs.next();
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182 void RemotedSession::validate(const Application& application, const char* client_addr, time_t timeout, bool local)
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184 // Basic expiration?
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185 time_t now = time(NULL);
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186 if (now > m_expires) {
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187 m_cache->m_log.info("session expired (ID: %s)", m_obj.name());
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188 throw opensaml::RetryableProfileException("Your session has expired, and you must re-authenticate.");
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193 if (m_cache->m_log.isDebugEnabled())
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194 m_cache->m_log.debug("comparing client address %s against %s", client_addr, getClientAddress());
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195 if (strcmp(getClientAddress(),client_addr)) {
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196 m_cache->m_log.warn("client address mismatch");
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197 throw opensaml::RetryableProfileException(
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198 "Your IP address ($1) does not match the address recorded at the time the session was established.",
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199 params(1,client_addr)
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207 DDF in("touch::"REMOTED_SESSION_CACHE"::SessionCache"), out;
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208 DDFJanitor jin(in);
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210 in.addmember("key").string(m_obj.name());
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211 in.addmember("version").integer(m_obj["version"].integer());
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213 // On 64-bit Windows, time_t doesn't fit in a long, so I'm using ISO timestamps.
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214 #ifndef HAVE_GMTIME_R
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215 struct tm* ptime=gmtime(&timeout);
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218 struct tm* ptime=gmtime_r(&timeout,&res);
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221 strftime(timebuf,32,"%Y-%m-%dT%H:%M:%SZ",ptime);
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222 in.addmember("timeout").string(timebuf);
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226 out=application.getServiceProvider().getListenerService()->send(in);
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233 if (out.isstruct()) {
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234 // We got an updated record back.
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236 for_each(m_attributes.begin(), m_attributes.end(), cleanup_const_pair<string,Attribute>());
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237 m_attributes.clear();
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242 m_lastAccess = now;
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245 RemotedCache::RemotedCache(const DOMElement* e)
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246 : SessionCache(e), m_log(Category::getInstance(SHIBSP_LOGCAT".SessionCache")), m_root(e), m_lock(NULL), shutdown(false)
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248 if (!SPConfig::getConfig().getServiceProvider()->getListenerService())
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249 throw ConfigurationException("RemotedCacheService requires a ListenerService, but none available.");
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251 m_lock = RWLock::create();
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252 shutdown_wait = CondWait::create();
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253 cleanup_thread = Thread::create(&cleanup_fn, (void*)this);
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256 RemotedCache::~RemotedCache()
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258 // Shut down the cleanup thread and let it know...
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260 shutdown_wait->signal();
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261 cleanup_thread->join(NULL);
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263 for_each(m_hashtable.begin(),m_hashtable.end(),xmltooling::cleanup_pair<string,RemotedSession>());
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265 delete shutdown_wait;
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268 Session* RemotedCache::find(const char* key, const Application& application, const char* client_addr, time_t timeout)
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271 xmltooling::NDC ndc("find");
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274 bool localValidation = false;
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275 RemotedSession* session=NULL;
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276 m_log.debug("searching local cache for session (%s)", key);
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278 map<string,RemotedSession*>::const_iterator i=m_hashtable.find(key);
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279 if (i==m_hashtable.end()) {
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281 m_log.debug("session not found locally, searching remote cache");
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283 DDF in("find::"REMOTED_SESSION_CACHE"::SessionCache"), out;
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284 DDFJanitor jin(in);
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286 in.addmember("key").string(key);
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288 // On 64-bit Windows, time_t doesn't fit in a long, so I'm using ISO timestamps.
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289 #ifndef HAVE_GMTIME_R
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290 struct tm* ptime=gmtime(&timeout);
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293 struct tm* ptime=gmtime_r(&timeout,&res);
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296 strftime(timebuf,32,"%Y-%m-%dT%H:%M:%SZ",ptime);
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297 in.addmember("timeout").string(timebuf);
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301 out=application.getServiceProvider().getListenerService()->send(in);
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302 if (!out.isstruct()) {
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304 m_log.debug("session not found in remote cache");
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308 // Wrap the results in a local entry and save it.
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309 session = new RemotedSession(this, out);
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310 // The remote end has handled timeout issues, we handle address and expiration checks.
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311 localValidation = true;
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318 // Lock for writing and repeat the search to avoid duplication.
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320 SharedLock shared(m_lock, false);
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321 if (m_hashtable.count(key)) {
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323 // We're using an existing session entry, so we have to switch back to full validation.
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324 localValidation = false;
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325 session = m_hashtable[key];
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329 m_hashtable[key]=session;
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334 // Save off and lock the session.
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335 session = i->second;
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339 m_log.debug("session found locally, validating it for use");
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342 if (!XMLString::equals(session->getApplicationID(), application.getId())) {
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343 m_log.error("an application (%s) tried to access another application's session", application.getId());
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348 // Verify currency and update the timestamp.
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349 // If the local switch is false, we also update the access time.
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351 session->validate(application, client_addr, timeout, localValidation);
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355 remove(key, application, client_addr);
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362 void RemotedCache::remove(const char* key, const Application& application, const char* client_addr)
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364 // Take care of local copy.
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368 DDF in("remove::"REMOTED_SESSION_CACHE"::SessionCache");
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369 DDFJanitor jin(in);
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371 in.addmember("key").string(key);
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372 in.addmember("application_id").string(application.getId());
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373 in.addmember("client_addr").string(client_addr);
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375 DDF out = application.getServiceProvider().getListenerService()->send(in);
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379 void RemotedCache::dormant(const char* key)
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382 xmltooling::NDC ndc("dormant");
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385 m_log.debug("deleting local copy of session (%s)", key);
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387 // lock the cache for writing, which means we know nobody is sitting in find()
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390 // grab the entry from the table
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391 map<string,RemotedSession*>::const_iterator i=m_hashtable.find(key);
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392 if (i==m_hashtable.end()) {
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397 // ok, remove the entry and lock it
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398 RemotedSession* entry=i->second;
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399 m_hashtable.erase(key);
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402 // unlock the cache
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405 // we can release the cache entry lock because we know we're not in the cache anymore
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411 void RemotedCache::cleanup()
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414 xmltooling::NDC ndc("cleanup");
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417 Mutex* mutex = Mutex::create();
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419 // Load our configuration details...
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420 static const XMLCh cleanupInterval[] = UNICODE_LITERAL_15(c,l,e,a,n,u,p,I,n,t,e,r,v,a,l);
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421 const XMLCh* tag=m_root ? m_root->getAttributeNS(NULL,cleanupInterval) : NULL;
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422 int rerun_timer = 900;
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424 rerun_timer = XMLString::parseInt(tag);
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425 if (rerun_timer <= 0)
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430 m_log.info("cleanup thread started...run every %d secs; timeout after %d secs", rerun_timer, m_cacheTimeout);
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432 while (!shutdown) {
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433 shutdown_wait->timedwait(mutex,rerun_timer);
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437 // Ok, let's run through the cleanup process and clean out
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438 // really old sessions. This is a two-pass process. The
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439 // first pass is done holding a read-lock while we iterate over
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440 // the cache. The second pass doesn't need a lock because
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441 // the 'deletes' will lock the cache.
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443 // Pass 1: iterate over the map and find all entries that have not been
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445 vector<string> stale_keys;
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446 time_t stale = time(NULL) - m_cacheTimeout;
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449 for (map<string,RemotedSession*>::const_iterator i=m_hashtable.begin(); i!=m_hashtable.end(); ++i) {
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450 // If the last access was BEFORE the stale timeout...
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452 time_t last=i->second->lastAccess();
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453 i->second->unlock();
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455 stale_keys.push_back(i->first);
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459 if (!stale_keys.empty()) {
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460 m_log.info("purging %d old sessions", stale_keys.size());
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462 // Pass 2: walk through the list of stale entries and remove them from the cache
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463 for (vector<string>::const_iterator j = stale_keys.begin(); j != stale_keys.end(); ++j)
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464 dormant(j->c_str());
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468 m_log.info("cleanup thread exiting");
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472 Thread::exit(NULL);
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475 void* RemotedCache::cleanup_fn(void* cache_p)
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477 RemotedCache* cache = reinterpret_cast<RemotedCache*>(cache_p);
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480 // First, let's block all signals
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481 Thread::mask_all_signals();
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484 // Now run the cleanup process.
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