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.
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13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * Shib1SessionInitiator.cpp
20 * Shibboleth 1.x 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 "metadata/MetadataProviderCriteria.h"
35 # include <saml/saml2/metadata/Metadata.h>
36 # include <saml/saml2/metadata/EndpointManager.h>
38 #include <xmltooling/XMLToolingConfig.h>
39 #include <xmltooling/util/URLEncoder.h>
41 using namespace shibsp;
42 using namespace opensaml::saml2md;
43 using namespace opensaml;
44 using namespace xmltooling;
49 #if defined (_MSC_VER)
50 #pragma warning( push )
51 #pragma warning( disable : 4250 )
54 class SHIBSP_DLLLOCAL Shib1SessionInitiator : public SessionInitiator, public AbstractHandler, public RemotedHandler
57 Shib1SessionInitiator(const DOMElement* e, const char* appId)
58 : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".SessionInitiator.Shib1"), NULL, &m_remapper), m_appId(appId) {
59 // If Location isn't set, defer address registration until the setParent call.
60 pair<bool,const char*> loc = getString("Location");
62 string address = m_appId + loc.second + "::run::Shib1SI";
63 setAddress(address.c_str());
66 virtual ~Shib1SessionInitiator() {}
68 void setParent(const PropertySet* parent);
69 void receive(DDF& in, ostream& out);
70 pair<bool,long> unwrap(SPRequest& request, DDF& out) const;
71 pair<bool,long> run(SPRequest& request, string& entityID, bool isHandler=true) const;
74 pair<bool,long> doRequest(
75 const Application& application,
76 const HTTPRequest* httpRequest,
77 HTTPResponse& httpResponse,
79 const char* acsLocation,
86 #if defined (_MSC_VER)
87 #pragma warning( pop )
90 SessionInitiator* SHIBSP_DLLLOCAL Shib1SessionInitiatorFactory(const pair<const DOMElement*,const char*>& p)
92 return new Shib1SessionInitiator(p.first, p.second);
97 void Shib1SessionInitiator::setParent(const PropertySet* parent)
99 DOMPropertySet::setParent(parent);
100 pair<bool,const char*> loc = getString("Location");
102 string address = m_appId + loc.second + "::run::Shib1SI";
103 setAddress(address.c_str());
106 m_log.warn("no Location property in Shib1 SessionInitiator (or parent), can't register as remoted handler");
110 pair<bool,long> Shib1SessionInitiator::run(SPRequest& request, string& entityID, bool isHandler) const
112 // We have to know the IdP to function.
113 if (entityID.empty())
114 return make_pair(false,0L);
118 const Handler* ACS=NULL;
120 const Application& app=request.getApplication();
123 option=request.getParameter("acsIndex");
125 ACS = app.getAssertionConsumerServiceByIndex(atoi(option));
127 request.log(SPRequest::SPWarn, "invalid acsIndex specified in request, using acsIndex property");
130 option = request.getParameter("target");
134 // Since we're passing the ACS by value, we need to compute the return URL,
135 // so we'll need the target resource for real.
136 recoverRelayState(request.getApplication(), request, request, target, false);
139 // We're running as a "virtual handler" from within the filter.
140 // The target resource is the current one and everything else is defaulted.
141 target=request.getRequestURL();
144 // Since we're not passing by index, we need to fully compute the return URL.
146 pair<bool,unsigned int> index = getUnsignedInt("acsIndex");
148 ACS = app.getAssertionConsumerServiceByIndex(index.second);
150 request.log(SPRequest::SPWarn, "invalid acsIndex property, using default ACS location");
153 ACS = app.getDefaultAssertionConsumerService();
156 // Validate the ACS for use with this protocol.
157 pair<bool,const char*> ACSbinding = ACS ? ACS->getString("Binding") : pair<bool,const char*>(false,NULL);
158 if (ACSbinding.first) {
159 pair<bool,const char*> compatibleBindings = getString("compatibleBindings");
160 if (compatibleBindings.first && strstr(compatibleBindings.second, ACSbinding.second) == NULL) {
161 m_log.info("configured or requested ACS has non-SAML 1.x binding");
162 return make_pair(false,0L);
164 else if (strcmp(ACSbinding.second, samlconstants::SAML1_PROFILE_BROWSER_POST) &&
165 strcmp(ACSbinding.second, samlconstants::SAML1_PROFILE_BROWSER_ARTIFACT)) {
166 m_log.info("configured or requested ACS has non-SAML 1.x binding");
167 return make_pair(false,0L);
171 // Compute the ACS URL. We add the ACS location to the base handlerURL.
172 string ACSloc=request.getHandlerURL(target.c_str());
173 pair<bool,const char*> loc=ACS ? ACS->getString("Location") : pair<bool,const char*>(false,NULL);
174 if (loc.first) ACSloc+=loc.second;
177 // We may already have RelayState set if we looped back here,
178 // but just in case target is a resource, we reset it back.
180 option = request.getParameter("target");
185 // Is the in-bound binding artifact?
186 bool artifactInbound = ACS ? XMLString::equals(ACS->getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_ARTIFACT) : false;
188 m_log.debug("attempting to initiate session using Shibboleth with provider (%s)", entityID.c_str());
190 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
191 // Out of process means the POST data via the request can be exposed directly to the private method.
192 // The method will handle POST preservation if necessary *before* issuing the response, but only if
193 // it dispatches to an IdP.
194 return doRequest(app, &request, request, entityID.c_str(), ACSloc.c_str(), artifactInbound, target);
198 DDF out,in = DDF(m_address.c_str()).structure();
199 DDFJanitor jin(in), jout(out);
200 in.addmember("application_id").string(app.getId());
201 in.addmember("entity_id").string(entityID.c_str());
202 in.addmember("acsLocation").string(ACSloc.c_str());
204 in.addmember("artifact").integer(1);
206 in.addmember("RelayState").unsafe_string(target.c_str());
208 // Remote the processing. Our unwrap method will handle POST data if necessary.
209 out = request.getServiceProvider().getListenerService()->send(in);
210 return unwrap(request, out);
213 pair<bool,long> Shib1SessionInitiator::unwrap(SPRequest& request, DDF& out) const
215 // See if there's any response to send back.
216 if (!out["redirect"].isnull() || !out["response"].isnull()) {
217 // If so, we're responsible for handling the POST data, probably by dropping a cookie.
218 preservePostData(request.getApplication(), request, request, out["RelayState"].string());
220 return RemotedHandler::unwrap(request, out);
223 void Shib1SessionInitiator::receive(DDF& in, ostream& out)
226 const char* aid=in["application_id"].string();
227 const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : NULL;
229 // Something's horribly wrong.
230 m_log.error("couldn't find application (%s) to generate AuthnRequest", aid ? aid : "(missing)");
231 throw ConfigurationException("Unable to locate application for new session, deleted?");
234 const char* entityID = in["entity_id"].string();
235 const char* acsLocation = in["acsLocation"].string();
236 if (!entityID || !acsLocation)
237 throw ConfigurationException("No entityID or acsLocation parameter supplied to remoted SessionInitiator.");
240 DDFJanitor jout(ret);
242 // Wrap the outgoing object with a Response facade.
243 auto_ptr<HTTPResponse> http(getResponse(ret));
245 string relayState(in["RelayState"].string() ? in["RelayState"].string() : "");
247 // Since we're remoted, the result should either be a throw, which we pass on,
248 // a false/0 return, which we just return as an empty structure, or a response/redirect,
249 // which we capture in the facade and send back.
250 doRequest(*app, NULL, *http.get(), entityID, acsLocation, (in["artifact"].integer() != 0), relayState);
253 ret.addmember("RelayState").unsafe_string(relayState.c_str());
257 pair<bool,long> Shib1SessionInitiator::doRequest(
258 const Application& app,
259 const HTTPRequest* httpRequest,
260 HTTPResponse& httpResponse,
261 const char* entityID,
262 const char* acsLocation,
268 // Use metadata to invoke the SSO service directly.
269 MetadataProvider* m=app.getMetadataProvider();
271 MetadataProviderCriteria mc(app, entityID, &IDPSSODescriptor::ELEMENT_QNAME, shibspconstants::SHIB1_PROTOCOL_ENUM);
272 pair<const EntityDescriptor*,const RoleDescriptor*> entity = m->getEntityDescriptor(mc);
274 m_log.warn("unable to locate metadata for provider (%s)", entityID);
275 throw MetadataException("Unable to locate metadata for identity provider ($entityID)", namedparams(1, "entityID", entityID));
277 else if (!entity.second) {
278 m_log.log(getParent() ? Priority::INFO : Priority::WARN, "unable to locate Shibboleth-aware identity provider role for provider (%s)", entityID);
280 return make_pair(false,0L);
281 throw MetadataException("Unable to locate Shibboleth-aware identity provider role for provider ($entityID)", namedparams(1, "entityID", entityID));
283 else if (artifact && !SPConfig::getConfig().getArtifactResolver()->isSupported(dynamic_cast<const SSODescriptorType&>(*entity.second))) {
284 m_log.warn("artifact profile selected for response, but identity provider lacks support");
286 return make_pair(false,0L);
287 throw MetadataException("Identity provider ($entityID) lacks SAML artifact support.", namedparams(1, "entityID", entityID));
290 const EndpointType* ep=EndpointManager<SingleSignOnService>(
291 dynamic_cast<const IDPSSODescriptor*>(entity.second)->getSingleSignOnServices()
292 ).getByBinding(shibspconstants::SHIB1_AUTHNREQUEST_PROFILE_URI);
294 m_log.warn("unable to locate compatible SSO service for provider (%s)", entityID);
296 return make_pair(false,0L);
297 throw MetadataException("Unable to locate compatible SSO service for provider ($entityID)", namedparams(1, "entityID", entityID));
300 preserveRelayState(app, httpResponse, relayState);
302 // Shib 1.x requires a target value.
303 if (relayState.empty())
304 relayState = "default";
307 sprintf(timebuf,"%lu",time(NULL));
308 const URLEncoder* urlenc = XMLToolingConfig::getConfig().getURLEncoder();
309 auto_ptr_char dest(ep->getLocation());
310 string req=string(dest.get()) + (strchr(dest.get(),'?') ? '&' : '?') + "shire=" + urlenc->encode(acsLocation) +
311 "&time=" + timebuf + "&target=" + urlenc->encode(relayState.c_str()) +
312 "&providerId=" + urlenc->encode(app.getRelyingParty(entity.first)->getString("entityID").second);
315 // If the request object is available, we're responsible for the POST data.
316 preservePostData(app, *httpRequest, httpResponse, relayState.c_str());
319 return make_pair(true, httpResponse.sendRedirect(req.c_str()));
321 return make_pair(false,0L);