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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8 * http://www.apache.org/licenses/LICENSE-2.0
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13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * SAML2LogoutInitiator.cpp
20 * Triggers SP-initiated logout for SAML 2.0 sessions.
24 #include "exceptions.h"
25 #include "Application.h"
26 #include "ServiceProvider.h"
27 #include "SessionCache.h"
28 #include "handler/AbstractHandler.h"
29 #include "handler/LogoutHandler.h"
32 # include "binding/SOAPClient.h"
33 # include <saml/SAMLConfig.h>
34 # include <saml/saml2/core/Protocols.h>
35 # include <saml/saml2/binding/SAML2SOAPClient.h>
36 # include <saml/saml2/metadata/EndpointManager.h>
37 # include <saml/saml2/metadata/MetadataCredentialCriteria.h>
38 using namespace opensaml::saml2;
39 using namespace opensaml::saml2p;
40 using namespace opensaml::saml2md;
41 using namespace opensaml;
43 # include "lite/SAMLConstants.h"
46 using namespace shibsp;
47 using namespace xmltooling;
48 using namespace log4cpp;
53 #if defined (_MSC_VER)
54 #pragma warning( push )
55 #pragma warning( disable : 4250 )
58 class SHIBSP_DLLLOCAL SAML2LogoutInitiator : public AbstractHandler, public LogoutHandler
61 SAML2LogoutInitiator(const DOMElement* e, const char* appId);
62 virtual ~SAML2LogoutInitiator() {
64 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
65 XMLString::release(&m_outgoing);
66 for_each(m_encoders.begin(), m_encoders.end(), cleanup_pair<const XMLCh*,MessageEncoder>());
71 void setParent(const PropertySet* parent);
72 void receive(DDF& in, ostream& out);
73 pair<bool,long> run(SPRequest& request, bool isHandler=true) const;
76 pair<bool,long> doRequest(const Application& application, Session* session_id, HTTPResponse& httpResponse) const;
80 LogoutRequest* buildRequest(
81 const Application& application, const Session& session, const IDPSSODescriptor& role, const MessageEncoder* encoder=NULL
85 vector<const XMLCh*> m_bindings;
86 map<const XMLCh*,MessageEncoder*> m_encoders;
88 auto_ptr_char m_protocol;
91 #if defined (_MSC_VER)
92 #pragma warning( pop )
95 Handler* SHIBSP_DLLLOCAL SAML2LogoutInitiatorFactory(const pair<const DOMElement*,const char*>& p)
97 return new SAML2LogoutInitiator(p.first, p.second);
101 SAML2LogoutInitiator::SAML2LogoutInitiator(const DOMElement* e, const char* appId)
102 : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".LogoutInitiator")), m_appId(appId),
106 m_protocol(samlconstants::SAML20P_NS)
109 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
110 // Handle outgoing binding setup.
111 pair<bool,const XMLCh*> outgoing = getXMLString("outgoingBindings");
112 if (outgoing.first) {
113 m_outgoing = XMLString::replicate(outgoing.second);
114 XMLString::trim(m_outgoing);
117 // No override, so we'll install a default binding precedence.
118 string prec = string(samlconstants::SAML20_BINDING_HTTP_REDIRECT) + ' ' + samlconstants::SAML20_BINDING_HTTP_POST + ' ' +
119 samlconstants::SAML20_BINDING_HTTP_POST_SIMPLESIGN + ' ' + samlconstants::SAML20_BINDING_HTTP_ARTIFACT;
120 m_outgoing = XMLString::transcode(prec.c_str());
124 XMLCh* start = m_outgoing;
125 while (start && *start) {
126 pos = XMLString::indexOf(start,chSpace);
128 *(start + pos)=chNull;
129 m_bindings.push_back(start);
131 auto_ptr_char b(start);
132 MessageEncoder * encoder =
133 SAMLConfig::getConfig().MessageEncoderManager.newPlugin(b.get(),pair<const DOMElement*,const XMLCh*>(e,NULL));
134 m_encoders[start] = encoder;
135 m_log.debug("supporting outgoing binding (%s)", b.get());
137 catch (exception& ex) {
138 m_log.error("error building MessageEncoder: %s", ex.what());
141 start = start + pos + 1;
148 pair<bool,const char*> loc = getString("Location");
150 string address = m_appId + loc.second + "::run::SAML2LI";
151 setAddress(address.c_str());
155 void SAML2LogoutInitiator::setParent(const PropertySet* parent)
157 DOMPropertySet::setParent(parent);
158 pair<bool,const char*> loc = getString("Location");
160 string address = m_appId + loc.second + "::run::SAML2LI";
161 setAddress(address.c_str());
164 m_log.warn("no Location property in SAML2 LogoutInitiator (or parent), can't register as remoted handler");
168 pair<bool,long> SAML2LogoutInitiator::run(SPRequest& request, bool isHandler) const
170 // Defer to base class for front-channel loop first.
171 pair<bool,long> ret = LogoutHandler::run(request, isHandler);
175 // At this point we know the front-channel is handled.
176 // We need the session to do any other work.
178 Session* session = NULL;
180 session = request.getSession(false, true, false); // don't cache it and ignore all checks
182 return make_pair(false,0);
184 // We only handle SAML 2.0 sessions.
185 if (!XMLString::equals(session->getProtocol(), m_protocol.get())) {
187 return make_pair(false,0);
190 catch (exception& ex) {
191 m_log.error("error accessing current session: %s", ex.what());
192 return make_pair(false,0);
195 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
196 // When out of process, we run natively.
197 return doRequest(request.getApplication(), session, request);
200 // When not out of process, we remote the request.
201 Locker locker(session);
202 DDF out,in(m_address.c_str());
203 DDFJanitor jin(in), jout(out);
204 in.addmember("application_id").string(request.getApplication().getId());
205 in.addmember("session_id").string(session->getID());
206 out=request.getServiceProvider().getListenerService()->send(in);
207 return unwrap(request, out);
211 void SAML2LogoutInitiator::receive(DDF& in, ostream& out)
214 // Defer to base class for notifications
215 if (in["notify"].integer() == 1)
216 return LogoutHandler::receive(in, out);
219 const char* aid=in["application_id"].string();
220 const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : NULL;
222 // Something's horribly wrong.
223 m_log.error("couldn't find application (%s) for logout", aid ? aid : "(missing)");
224 throw ConfigurationException("Unable to locate application for logout, deleted?");
227 // Set up a response shim.
229 DDFJanitor jout(ret);
230 auto_ptr<HTTPResponse> resp(getResponse(ret));
232 Session* session = NULL;
234 session = app->getServiceProvider().getSessionCache()->find(in["session_id"].string(), *app, NULL, NULL);
236 catch (exception& ex) {
237 m_log.error("error accessing current session: %s", ex.what());
240 // With no session, we just skip the request and let it fall through to an empty struct return.
242 if (session->getNameID() && session->getEntityID()) {
243 // Since we're remoted, the result should either be a throw, which we pass on,
244 // a false/0 return, which we just return as an empty structure, or a response/redirect,
245 // which we capture in the facade and send back.
246 doRequest(*app, session, *resp.get());
249 m_log.error("no NameID or issuing entityID found in session");
252 app->getServiceProvider().getSessionCache()->remove(in["session_id"].string(), *app);
257 throw ConfigurationException("Cannot perform logout using lite version of shibsp library.");
261 pair<bool,long> SAML2LogoutInitiator::doRequest(const Application& application, Session* session, HTTPResponse& response) const
263 // Do back channel notification.
264 vector<string> sessions(1, session->getID());
265 if (!notifyBackChannel(application, sessions)) {
267 application.getServiceProvider().getSessionCache()->remove(sessions.front().c_str(), application);
268 return sendLogoutPage(application, response, true, "Partial logout failure.");
272 pair<bool,long> ret = make_pair(false,0);
274 // With a session in hand, we can create a LogoutRequest message, if we can find a compatible endpoint.
275 Locker metadataLocker(application.getMetadataProvider());
276 const EntityDescriptor* entity = application.getMetadataProvider()->getEntityDescriptor(session->getEntityID());
278 throw MetadataException(
279 "Unable to locate metadata for identity provider ($entityID)",
280 namedparams(1, "entityID", session->getEntityID())
283 const IDPSSODescriptor* role = entity->getIDPSSODescriptor(samlconstants::SAML20P_NS);
285 throw MetadataException(
286 "Unable to locate SAML 2.0 IdP role for identity provider ($entityID).",
287 namedparams(1, "entityID", session->getEntityID())
291 const EndpointType* ep=NULL;
292 const MessageEncoder* encoder=NULL;
293 vector<const XMLCh*>::const_iterator b;
294 for (b = m_bindings.begin(); b!=m_bindings.end(); ++b) {
295 if (ep=EndpointManager<SingleLogoutService>(role->getSingleLogoutServices()).getByBinding(*b)) {
296 map<const XMLCh*,MessageEncoder*>::const_iterator enc = m_encoders.find(*b);
297 if (enc!=m_encoders.end())
298 encoder = enc->second;
302 if (!ep || !encoder) {
303 m_log.warn("no compatible front channel SingleLogoutService, trying back channel...");
304 shibsp::SecurityPolicy policy(application);
305 shibsp::SOAPClient soaper(policy);
306 MetadataCredentialCriteria mcc(*role);
308 LogoutResponse* logoutResponse=NULL;
309 auto_ptr_XMLCh binding(samlconstants::SAML20_BINDING_SOAP);
310 const vector<SingleLogoutService*>& endpoints=role->getSingleLogoutServices();
311 for (vector<SingleLogoutService*>::const_iterator epit=endpoints.begin(); !logoutResponse && epit!=endpoints.end(); ++epit) {
313 if (!XMLString::equals((*epit)->getBinding(),binding.get()))
315 LogoutRequest* msg = buildRequest(application, *session, *role);
316 auto_ptr_char dest((*epit)->getLocation());
318 SAML2SOAPClient client(soaper, false);
319 client.sendSAML(msg, mcc, dest.get());
320 StatusResponseType* srt = client.receiveSAML();
321 if (!(logoutResponse = dynamic_cast<LogoutResponse*>(srt))) {
326 catch (exception& ex) {
327 m_log.error("error sending LogoutRequest message: %s", ex.what());
333 return sendLogoutPage(application, response, false, "Identity provider did not respond to logout request.");
334 if (!logoutResponse->getStatus() || !logoutResponse->getStatus()->getStatusCode() ||
335 !XMLString::equals(logoutResponse->getStatus()->getStatusCode()->getValue(), saml2p::StatusCode::SUCCESS)) {
336 delete logoutResponse;
337 return sendLogoutPage(application, response, false, "Identity provider returned a SAML error in response to logout request.");
339 delete logoutResponse;
340 return sendLogoutPage(application, response, false, "Logout completed successfully.");
343 auto_ptr<LogoutRequest> msg(buildRequest(application, *session, *role, encoder));
345 msg->setDestination(ep->getLocation());
346 auto_ptr_char dest(ep->getLocation());
347 ret.second = sendMessage(*encoder, msg.get(), NULL, dest.get(), role, application, response, "signRequests");
349 msg.release(); // freed by encoder
351 catch (exception& ex) {
352 m_log.error("error issuing SAML 2.0 logout request: %s", ex.what());
356 string session_id = session->getID();
359 application.getServiceProvider().getSessionCache()->remove(session_id.c_str(), application);
364 string session_id = session->getID();
366 application.getServiceProvider().getSessionCache()->remove(session_id.c_str(), application);
367 throw ConfigurationException("Cannot perform logout using lite version of shibsp library.");
373 LogoutRequest* SAML2LogoutInitiator::buildRequest(
374 const Application& application, const Session& session, const IDPSSODescriptor& role, const MessageEncoder* encoder
377 auto_ptr<LogoutRequest> msg(LogoutRequestBuilder::buildLogoutRequest());
378 Issuer* issuer = IssuerBuilder::buildIssuer();
379 msg->setIssuer(issuer);
380 issuer->setName(application.getXMLString("entityID").second);
381 auto_ptr_XMLCh index(session.getSessionIndex());
382 if (index.get() && *index.get()) {
383 SessionIndex* si = SessionIndexBuilder::buildSessionIndex();
384 msg->getSessionIndexs().push_back(si);
385 si->setSessionIndex(index.get());
388 const NameID* nameid = session.getNameID();
389 const PropertySet* relyingParty = application.getRelyingParty(dynamic_cast<EntityDescriptor*>(role.getParent()));
390 pair<bool,const char*> flag = relyingParty->getString("encryptRequests");
392 (!strcmp(flag.second, "true") || (encoder && !strcmp(flag.second, "front")) || (!encoder && !strcmp(flag.second, "back")))) {
393 auto_ptr<EncryptedID> encrypted(EncryptedIDBuilder::buildEncryptedID());
394 MetadataCredentialCriteria mcc(role);
397 *(application.getMetadataProvider()),
399 encoder ? encoder->isCompact() : false,
400 relyingParty->getXMLString("encryptionAlg").second
402 msg->setEncryptedID(encrypted.release());
406 // No encoder being used, so sign for SOAP client manually.
407 flag = relyingParty->getString("signRequests");
408 if (flag.first && (!strcmp(flag.second, "true") || !strcmp(flag.second, "back"))) {
409 CredentialResolver* credResolver=application.getCredentialResolver();
411 Locker credLocker(credResolver);
412 // Fill in criteria to use.
413 MetadataCredentialCriteria mcc(role);
414 mcc.setUsage(CredentialCriteria::SIGNING_CREDENTIAL);
415 pair<bool,const char*> keyName = relyingParty->getString("keyName");
417 mcc.getKeyNames().insert(keyName.second);
418 pair<bool,const XMLCh*> sigalg = relyingParty->getXMLString("signatureAlg");
420 mcc.setXMLAlgorithm(sigalg.second);
421 const Credential* cred = credResolver->resolve(&mcc);
423 xmlsignature::Signature* sig = xmlsignature::SignatureBuilder::buildSignature();
424 msg->setSignature(sig);
425 pair<bool, const XMLCh*> alg = relyingParty->getXMLString("signatureAlg");
427 sig->setSignatureAlgorithm(alg.second);
428 alg = relyingParty->getXMLString("digestAlg");
430 ContentReference* cr = dynamic_cast<ContentReference*>(sig->getContentReference());
432 cr->setDigestAlgorithm(alg.second);
435 // Sign response while marshalling.
436 vector<xmlsignature::Signature*> sigs(1,sig);
437 msg->marshall((DOMDocument*)NULL,&sigs,cred);
440 m_log.warn("no signing credential resolved, leaving message unsigned");
444 m_log.warn("no credential resolver installed, leaving message unsigned");
449 return msg.release();