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.
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 * SAML2SessionInitiator.cpp
20 * SAML 2.0 AuthnRequest support.
24 #include "Application.h"
25 #include "exceptions.h"
26 #include "ServiceProvider.h"
27 #include "SPRequest.h"
28 #include "handler/AbstractHandler.h"
29 #include "handler/RemotedHandler.h"
30 #include "handler/SessionInitiator.h"
31 #include "util/SPConstants.h"
34 # include <saml/SAMLConfig.h>
35 # include <saml/saml2/core/Protocols.h>
36 # include <saml/saml2/metadata/EndpointManager.h>
37 # include <saml/saml2/metadata/Metadata.h>
38 # include <saml/saml2/metadata/MetadataCredentialCriteria.h>
39 using namespace opensaml::saml2;
40 using namespace opensaml::saml2p;
41 using namespace opensaml::saml2md;
44 using namespace shibsp;
45 using namespace opensaml;
46 using namespace xmltooling;
47 using namespace log4cpp;
52 #if defined (_MSC_VER)
53 #pragma warning( push )
54 #pragma warning( disable : 4250 )
57 class SHIBSP_DLLLOCAL SAML2SessionInitiator : public SessionInitiator, public AbstractHandler, public RemotedHandler
60 SAML2SessionInitiator(const DOMElement* e, const char* appId);
61 virtual ~SAML2SessionInitiator() {
63 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
64 XMLString::release(&m_outgoing);
65 for_each(m_encoders.begin(), m_encoders.end(), cleanup_pair<const XMLCh*,MessageEncoder>());
66 delete m_requestTemplate;
71 void setParent(const PropertySet* parent);
72 void receive(DDF& in, ostream& out);
73 pair<bool,long> run(SPRequest& request, const char* entityID=NULL, bool isHandler=true) const;
76 pair<bool,long> doRequest(
77 const Application& application,
78 HTTPResponse& httpResponse,
80 const XMLCh* acsIndex,
81 const char* acsLocation,
82 const XMLCh* acsBinding,
85 const char* authnContextClassRef,
86 const char* authnContextComparison,
93 vector<const XMLCh*> m_bindings;
94 map<const XMLCh*,MessageEncoder*> m_encoders;
95 AuthnRequest* m_requestTemplate;
99 #if defined (_MSC_VER)
100 #pragma warning( pop )
103 SessionInitiator* SHIBSP_DLLLOCAL SAML2SessionInitiatorFactory(const pair<const DOMElement*,const char*>& p)
105 return new SAML2SessionInitiator(p.first, p.second);
110 SAML2SessionInitiator::SAML2SessionInitiator(const DOMElement* e, const char* appId)
111 : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".SessionInitiator")), m_appId(appId)
115 m_requestTemplate=NULL;
116 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
117 // Check for a template AuthnRequest to build from.
118 DOMElement* child = XMLHelper::getFirstChildElement(e, samlconstants::SAML20P_NS, AuthnRequest::LOCAL_NAME);
120 m_requestTemplate = dynamic_cast<AuthnRequest*>(AuthnRequestBuilder::buildOneFromElement(child));
122 // Handle outgoing binding setup.
123 pair<bool,const XMLCh*> outgoing = getXMLString("outgoingBindings");
124 if (outgoing.first) {
125 m_outgoing = XMLString::replicate(outgoing.second);
126 XMLString::trim(m_outgoing);
129 // No override, so we'll install a default binding precedence.
130 string prec = string(samlconstants::SAML20_BINDING_HTTP_REDIRECT) + ' ' + samlconstants::SAML20_BINDING_HTTP_POST + ' ' +
131 samlconstants::SAML20_BINDING_HTTP_POST_SIMPLESIGN + ' ' + samlconstants::SAML20_BINDING_HTTP_ARTIFACT;
132 m_outgoing = XMLString::transcode(prec.c_str());
136 XMLCh* start = m_outgoing;
137 while (start && *start) {
138 pos = XMLString::indexOf(start,chSpace);
140 *(start + pos)=chNull;
141 m_bindings.push_back(start);
143 auto_ptr_char b(start);
144 MessageEncoder * encoder = SAMLConfig::getConfig().MessageEncoderManager.newPlugin(
145 b.get(),pair<const DOMElement*,const XMLCh*>(e,NULL)
147 m_encoders[start] = encoder;
148 m_log.debug("supporting outgoing binding (%s)", b.get());
150 catch (exception& ex) {
151 m_log.error("error building MessageEncoder: %s", ex.what());
154 start = start + pos + 1;
161 // If Location isn't set, defer address registration until the setParent call.
162 pair<bool,const char*> loc = getString("Location");
164 string address = m_appId + loc.second + "::run::SAML2SI";
165 setAddress(address.c_str());
169 void SAML2SessionInitiator::setParent(const PropertySet* parent)
171 DOMPropertySet::setParent(parent);
172 pair<bool,const char*> loc = getString("Location");
174 string address = m_appId + loc.second + "::run::SAML2SI";
175 setAddress(address.c_str());
178 m_log.warn("no Location property in SAML2 SessionInitiator (or parent), can't register as remoted handler");
182 pair<bool,long> SAML2SessionInitiator::run(SPRequest& request, const char* entityID, bool isHandler) const
184 // We have to know the IdP to function.
185 if (!entityID || !*entityID)
186 return make_pair(false,0);
189 const Handler* ACS=NULL;
191 pair<bool,const char*> acClass;
192 pair<bool,const char*> acComp;
193 bool isPassive=false,forceAuthn=false;
194 const Application& app=request.getApplication();
195 pair<bool,bool> acsByIndex = getBool("acsByIndex");
198 option=request.getParameter("acsIndex");
200 ACS = app.getAssertionConsumerServiceByIndex(atoi(option));
202 request.log(SPRequest::SPWarn, "invalid acsIndex specified in request, using default ACS location");
205 option = request.getParameter("target");
208 if (acsByIndex.first && !acsByIndex.second) {
209 // Since we're passing the ACS by value, we need to compute the return URL,
210 // so we'll need the target resource for real.
211 recoverRelayState(request.getApplication(), request, target, false);
214 option = request.getParameter("isPassive");
215 isPassive = (option && (*option=='1' || *option=='t'));
217 option = request.getParameter("forceAuthn");
218 forceAuthn = (option && (*option=='1' || *option=='t'));
221 acClass.second = request.getParameter("authnContextClassRef");
222 acClass.first = (acClass.second!=NULL);
223 acComp.second = request.getParameter("authnContextComparison");
224 acComp.first = (acComp.second!=NULL);
227 // We're running as a "virtual handler" from within the filter.
228 // The target resource is the current one and everything else is defaulted.
229 target=request.getRequestURL();
230 const PropertySet* settings = request.getRequestSettings().first;
232 pair<bool,bool> flag = settings->getBool("isPassive");
233 isPassive = flag.first && flag.second;
235 flag = settings->getBool("forceAuthn");
236 forceAuthn = flag.first && flag.second;
239 acClass = settings->getString("authnContextClassRef");
240 acComp = settings->getString("authnContextComparison");
243 m_log.debug("attempting to initiate session using SAML 2.0 with provider (%s)", entityID);
246 pair<bool,unsigned int> index = getUnsignedInt("defaultACSIndex");
248 ACS = app.getAssertionConsumerServiceByIndex(index.second);
250 request.log(SPRequest::SPWarn, "invalid defaultACSIndex, using default ACS location");
253 ACS = app.getDefaultAssertionConsumerService();
256 // To invoke the request builder, the key requirement is to figure out how
257 // to express the ACS, by index or value, and if by value, where.
259 SPConfig& conf = SPConfig::getConfig();
260 if (conf.isEnabled(SPConfig::OutOfProcess)) {
261 if (!acsByIndex.first || acsByIndex.second) {
264 // We may already have RelayState set if we looped back here,
265 // but just in case target is a resource, we reset it back.
267 option = request.getParameter("target");
272 app, request, entityID,
273 ACS ? ACS->getXMLString("index").second : NULL, NULL, NULL,
274 isPassive, forceAuthn,
275 acClass.first ? acClass.second : NULL,
276 acComp.first ? acComp.second : NULL,
281 // Since we're not passing by index, we need to fully compute the return URL and binding.
282 // Compute the ACS URL. We add the ACS location to the base handlerURL.
283 string ACSloc=request.getHandlerURL(target.c_str());
284 pair<bool,const char*> loc=ACS ? ACS->getString("Location") : pair<bool,const char*>(false,NULL);
285 if (loc.first) ACSloc+=loc.second;
288 // We may already have RelayState set if we looped back here,
289 // but just in case target is a resource, we reset it back.
291 option = request.getParameter("target");
297 app, request, entityID,
298 NULL, ACSloc.c_str(), ACS ? ACS->getXMLString("Binding").second : NULL,
299 isPassive, forceAuthn,
300 acClass.first ? acClass.second : NULL,
301 acComp.first ? acComp.second : NULL,
307 DDF out,in = DDF(m_address.c_str()).structure();
308 DDFJanitor jin(in), jout(out);
309 in.addmember("application_id").string(app.getId());
310 in.addmember("entity_id").string(entityID);
312 in.addmember("isPassive").integer(1);
314 in.addmember("forceAuthn").integer(1);
316 in.addmember("authnContextClassRef").string(acClass.second);
318 in.addmember("authnContextComparison").string(acComp.second);
319 if (!acsByIndex.first || acsByIndex.second) {
321 in.addmember("acsIndex").string(ACS->getString("index").second);
324 // Since we're not passing by index, we need to fully compute the return URL and binding.
325 // Compute the ACS URL. We add the ACS location to the base handlerURL.
326 string ACSloc=request.getHandlerURL(target.c_str());
327 pair<bool,const char*> loc=ACS ? ACS->getString("Location") : pair<bool,const char*>(false,NULL);
328 if (loc.first) ACSloc+=loc.second;
329 in.addmember("acsLocation").string(ACSloc.c_str());
331 in.addmember("acsBinding").string(ACS->getString("Binding").second);
335 // We may already have RelayState set if we looped back here,
336 // but just in case target is a resource, we reset it back.
338 option = request.getParameter("target");
343 in.addmember("RelayState").string(target.c_str());
345 // Remote the processing.
346 out = request.getServiceProvider().getListenerService()->send(in);
347 return unwrap(request, out);
350 void SAML2SessionInitiator::receive(DDF& in, ostream& out)
353 const char* aid=in["application_id"].string();
354 const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : NULL;
356 // Something's horribly wrong.
357 m_log.error("couldn't find application (%s) to generate AuthnRequest", aid ? aid : "(missing)");
358 throw ConfigurationException("Unable to locate application for new session, deleted?");
361 const char* entityID = in["entity_id"].string();
363 throw ConfigurationException("No entityID parameter supplied to remoted SessionInitiator.");
366 DDFJanitor jout(ret);
368 // Wrap the outgoing object with a Response facade.
369 auto_ptr<HTTPResponse> http(getResponse(ret));
371 auto_ptr_XMLCh index(in["acsIndex"].string());
372 auto_ptr_XMLCh bind(in["acsBinding"].string());
374 string relayState(in["RelayState"].string() ? in["RelayState"].string() : "");
376 // Since we're remoted, the result should either be a throw, which we pass on,
377 // a false/0 return, which we just return as an empty structure, or a response/redirect,
378 // which we capture in the facade and send back.
380 *app, *http.get(), entityID,
381 index.get(), in["acsLocation"].string(), bind.get(),
382 in["isPassive"].integer()==1, in["forceAuthn"].integer()==1,
383 in["authnContextClassRef"].string(), in["authnContextComparison"].string(),
389 pair<bool,long> SAML2SessionInitiator::doRequest(
390 const Application& app,
391 HTTPResponse& httpResponse,
392 const char* entityID,
393 const XMLCh* acsIndex,
394 const char* acsLocation,
395 const XMLCh* acsBinding,
398 const char* authnContextClassRef,
399 const char* authnContextComparison,
404 // Use metadata to locate the IdP's SSO service.
405 MetadataProvider* m=app.getMetadataProvider();
407 const EntityDescriptor* entity=m->getEntityDescriptor(entityID);
409 m_log.error("unable to locate metadata for provider (%s)", entityID);
410 throw MetadataException("Unable to locate metadata for identity provider ($entityID)",
411 namedparams(1, "entityID", entityID));
413 const IDPSSODescriptor* role=entity->getIDPSSODescriptor(samlconstants::SAML20P_NS);
415 m_log.error("unable to locate SAML 2.0 identity provider role for provider (%s)", entityID);
416 return make_pair(false,0);
419 // Loop over the supportable outgoing bindings.
420 const EndpointType* ep=NULL;
421 const MessageEncoder* encoder=NULL;
422 vector<const XMLCh*>::const_iterator b;
423 for (b = m_bindings.begin(); b!=m_bindings.end(); ++b) {
424 if (ep=EndpointManager<SingleSignOnService>(role->getSingleSignOnServices()).getByBinding(*b)) {
425 map<const XMLCh*,MessageEncoder*>::const_iterator enc = m_encoders.find(*b);
426 if (enc!=m_encoders.end())
427 encoder = enc->second;
431 if (!ep || !encoder) {
432 m_log.error("unable to locate compatible SSO service for provider (%s)", entityID);
433 return make_pair(false,0);
436 preserveRelayState(app, httpResponse, relayState);
438 auto_ptr<AuthnRequest> req(m_requestTemplate ? m_requestTemplate->cloneAuthnRequest() : AuthnRequestBuilder::buildAuthnRequest());
439 if (m_requestTemplate) {
440 // Freshen TS and ID.
442 req->setIssueInstant(time(NULL));
445 req->setDestination(ep->getLocation());
446 if (acsIndex && *acsIndex)
447 req->setAssertionConsumerServiceIndex(acsIndex);
449 auto_ptr_XMLCh wideloc(acsLocation);
450 req->setAssertionConsumerServiceURL(wideloc.get());
452 if (acsBinding && *acsBinding)
453 req->setProtocolBinding(acsBinding);
455 req->IsPassive(isPassive);
457 req->ForceAuthn(forceAuthn);
458 if (!req->getIssuer()) {
459 Issuer* issuer = IssuerBuilder::buildIssuer();
460 req->setIssuer(issuer);
461 issuer->setName(app.getXMLString("entityID").second);
463 if (!req->getNameIDPolicy()) {
464 NameIDPolicy* namepol = NameIDPolicyBuilder::buildNameIDPolicy();
465 req->setNameIDPolicy(namepol);
466 namepol->AllowCreate(true);
468 if (authnContextClassRef || authnContextComparison) {
469 RequestedAuthnContext* reqContext = req->getRequestedAuthnContext();
471 reqContext = RequestedAuthnContextBuilder::buildRequestedAuthnContext();
472 req->setRequestedAuthnContext(reqContext);
474 if (authnContextClassRef) {
475 reqContext->getAuthnContextDeclRefs().clear();
476 auto_ptr_XMLCh wideclass(authnContextClassRef);
477 AuthnContextClassRef* cref = AuthnContextClassRefBuilder::buildAuthnContextClassRef();
478 cref->setReference(wideclass.get());
479 reqContext->getAuthnContextClassRefs().push_back(cref);
481 if (authnContextComparison &&
482 (!reqContext->getAuthnContextClassRefs().empty() || !reqContext->getAuthnContextDeclRefs().empty())) {
483 auto_ptr_XMLCh widecomp(authnContextComparison);
484 reqContext->setComparison(widecomp.get());
488 auto_ptr_char dest(ep->getLocation());
490 long ret = sendMessage(
491 *encoder, req.get(), relayState.c_str(), dest.get(), role, app, httpResponse, "signRequests", role->WantAuthnRequestsSigned()
493 req.release(); // freed by encoder
494 return make_pair(true,ret);
496 return make_pair(false,0);