2 * Copyright 2001-2010 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
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18 * Shib1SessionInitiator.cpp
20 * Shibboleth 1.x AuthnRequest support.
24 #include "Application.h"
25 #include "exceptions.h"
26 #include "ServiceProvider.h"
27 #include "handler/AbstractHandler.h"
28 #include "handler/RemotedHandler.h"
29 #include "handler/SessionInitiator.h"
30 #include "util/SPConstants.h"
33 # include "metadata/MetadataProviderCriteria.h"
34 # include <saml/saml2/metadata/Metadata.h>
35 # include <saml/saml2/metadata/EndpointManager.h>
36 # include <saml/util/SAMLConstants.h>
38 # include "lite/SAMLConstants.h"
40 #include <xmltooling/XMLToolingConfig.h>
41 #include <xmltooling/util/URLEncoder.h>
43 using namespace shibsp;
44 using namespace opensaml::saml2md;
45 using namespace opensaml;
46 using namespace xmltooling;
51 #if defined (_MSC_VER)
52 #pragma warning( push )
53 #pragma warning( disable : 4250 )
56 class SHIBSP_DLLLOCAL Shib1SessionInitiator : public SessionInitiator, public AbstractHandler, public RemotedHandler
59 Shib1SessionInitiator(const DOMElement* e, const char* appId)
60 : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".SessionInitiator.Shib1"), NULL, &m_remapper), m_appId(appId) {
61 // If Location isn't set, defer address registration until the setParent call.
62 pair<bool,const char*> loc = getString("Location");
64 string address = m_appId + loc.second + "::run::Shib1SI";
65 setAddress(address.c_str());
68 virtual ~Shib1SessionInitiator() {}
70 void setParent(const PropertySet* parent);
71 void receive(DDF& in, ostream& out);
72 pair<bool,long> unwrap(SPRequest& request, DDF& out) const;
73 pair<bool,long> run(SPRequest& request, string& entityID, bool isHandler=true) const;
76 pair<bool,long> doRequest(
77 const Application& application,
78 const HTTPRequest* httpRequest,
79 HTTPResponse& httpResponse,
81 const char* acsLocation,
88 #if defined (_MSC_VER)
89 #pragma warning( pop )
92 SessionInitiator* SHIBSP_DLLLOCAL Shib1SessionInitiatorFactory(const pair<const DOMElement*,const char*>& p)
94 return new Shib1SessionInitiator(p.first, p.second);
99 void Shib1SessionInitiator::setParent(const PropertySet* parent)
101 DOMPropertySet::setParent(parent);
102 pair<bool,const char*> loc = getString("Location");
104 string address = m_appId + loc.second + "::run::Shib1SI";
105 setAddress(address.c_str());
108 m_log.warn("no Location property in Shib1 SessionInitiator (or parent), can't register as remoted handler");
112 pair<bool,long> Shib1SessionInitiator::run(SPRequest& request, string& entityID, bool isHandler) const
114 // We have to know the IdP to function.
115 if (entityID.empty() || !checkCompatibility(request, isHandler))
116 return make_pair(false,0L);
119 pair<bool,const char*> prop;
120 const Handler* ACS=NULL;
121 const Application& app = request.getApplication();
124 prop.second = request.getParameter("acsIndex");
125 if (prop.second && *prop.second) {
126 ACS = app.getAssertionConsumerServiceByIndex(atoi(prop.second));
128 request.log(SPRequest::SPWarn, "invalid acsIndex specified in request, using acsIndex property");
131 prop = getString("target", request);
133 target = prop.second;
135 // Since we're passing the ACS by value, we need to compute the return URL,
136 // so we'll need the target resource for real.
137 recoverRelayState(app, request, request, target, false);
140 // Check for a hardwired target value in the map or handler.
141 prop = getString("target", request, HANDLER_PROPERTY_MAP|HANDLER_PROPERTY_FIXED);
143 target = prop.second;
145 target = request.getRequestURL();
148 // Since we're not passing by index, we need to fully compute the return URL.
150 pair<bool,unsigned int> index = getUnsignedInt("acsIndex", request, HANDLER_PROPERTY_MAP|HANDLER_PROPERTY_FIXED);
152 ACS = app.getAssertionConsumerServiceByIndex(index.second);
154 request.log(SPRequest::SPWarn, "invalid acsIndex property, using default ACS location");
157 ACS = app.getDefaultAssertionConsumerService();
160 // Validate the ACS for use with this protocol.
161 pair<bool,const char*> ACSbinding = ACS ? ACS->getString("Binding") : pair<bool,const char*>(false,NULL);
162 if (ACSbinding.first) {
163 pair<bool,const char*> compatibleBindings = getString("compatibleBindings");
164 if (compatibleBindings.first && strstr(compatibleBindings.second, ACSbinding.second) == NULL) {
165 m_log.error("configured or requested ACS has non-SAML 1.x binding");
166 throw ConfigurationException("Configured or requested ACS has non-SAML 1.x binding ($1).", params(1, ACSbinding.second));
168 else if (strcmp(ACSbinding.second, samlconstants::SAML1_PROFILE_BROWSER_POST) &&
169 strcmp(ACSbinding.second, samlconstants::SAML1_PROFILE_BROWSER_ARTIFACT)) {
170 m_log.error("configured or requested ACS has non-SAML 1.x binding");
171 throw ConfigurationException("Configured or requested ACS has non-SAML 1.x binding ($1).", params(1, ACSbinding.second));
175 // Compute the ACS URL. We add the ACS location to the base handlerURL.
176 string ACSloc = request.getHandlerURL(target.c_str());
177 prop = ACS ? ACS->getString("Location") : pair<bool,const char*>(false,NULL);
179 ACSloc += prop.second;
182 // We may already have RelayState set if we looped back here,
183 // but we've turned it back into a resource by this point, so if there's
184 // a target on the URL, reset to that value.
185 prop.second = request.getParameter("target");
186 if (prop.second && *prop.second)
187 target = prop.second;
190 // Is the in-bound binding artifact?
191 bool artifactInbound = ACS ? XMLString::equals(ACS->getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_ARTIFACT) : false;
193 m_log.debug("attempting to initiate session using Shibboleth with provider (%s)", entityID.c_str());
195 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
196 // Out of process means the POST data via the request can be exposed directly to the private method.
197 // The method will handle POST preservation if necessary *before* issuing the response, but only if
198 // it dispatches to an IdP.
199 return doRequest(app, &request, request, entityID.c_str(), ACSloc.c_str(), artifactInbound, target);
203 DDF out,in = DDF(m_address.c_str()).structure();
204 DDFJanitor jin(in), jout(out);
205 in.addmember("application_id").string(app.getId());
206 in.addmember("entity_id").string(entityID.c_str());
207 in.addmember("acsLocation").string(ACSloc.c_str());
209 in.addmember("artifact").integer(1);
211 in.addmember("RelayState").unsafe_string(target.c_str());
213 // Remote the processing. Our unwrap method will handle POST data if necessary.
214 out = request.getServiceProvider().getListenerService()->send(in);
215 return unwrap(request, out);
218 pair<bool,long> Shib1SessionInitiator::unwrap(SPRequest& request, DDF& out) const
220 // See if there's any response to send back.
221 if (!out["redirect"].isnull() || !out["response"].isnull()) {
222 // If so, we're responsible for handling the POST data, probably by dropping a cookie.
223 preservePostData(request.getApplication(), request, request, out["RelayState"].string());
225 return RemotedHandler::unwrap(request, out);
228 void Shib1SessionInitiator::receive(DDF& in, ostream& out)
231 const char* aid=in["application_id"].string();
232 const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : NULL;
234 // Something's horribly wrong.
235 m_log.error("couldn't find application (%s) to generate AuthnRequest", aid ? aid : "(missing)");
236 throw ConfigurationException("Unable to locate application for new session, deleted?");
239 const char* entityID = in["entity_id"].string();
240 const char* acsLocation = in["acsLocation"].string();
241 if (!entityID || !acsLocation)
242 throw ConfigurationException("No entityID or acsLocation parameter supplied to remoted SessionInitiator.");
245 DDFJanitor jout(ret);
247 // Wrap the outgoing object with a Response facade.
248 auto_ptr<HTTPResponse> http(getResponse(ret));
250 string relayState(in["RelayState"].string() ? in["RelayState"].string() : "");
252 // Since we're remoted, the result should either be a throw, which we pass on,
253 // a false/0 return, which we just return as an empty structure, or a response/redirect,
254 // which we capture in the facade and send back.
255 doRequest(*app, NULL, *http.get(), entityID, acsLocation, (in["artifact"].integer() != 0), relayState);
258 ret.addmember("RelayState").unsafe_string(relayState.c_str());
262 pair<bool,long> Shib1SessionInitiator::doRequest(
263 const Application& app,
264 const HTTPRequest* httpRequest,
265 HTTPResponse& httpResponse,
266 const char* entityID,
267 const char* acsLocation,
273 // Use metadata to invoke the SSO service directly.
274 MetadataProvider* m=app.getMetadataProvider();
276 MetadataProviderCriteria mc(app, entityID, &IDPSSODescriptor::ELEMENT_QNAME, shibspconstants::SHIB1_PROTOCOL_ENUM);
277 pair<const EntityDescriptor*,const RoleDescriptor*> entity = m->getEntityDescriptor(mc);
279 m_log.warn("unable to locate metadata for provider (%s)", entityID);
280 throw MetadataException("Unable to locate metadata for identity provider ($entityID)", namedparams(1, "entityID", entityID));
282 else if (!entity.second) {
283 m_log.log(getParent() ? Priority::INFO : Priority::WARN, "unable to locate Shibboleth-aware identity provider role for provider (%s)", entityID);
285 return make_pair(false,0L);
286 throw MetadataException("Unable to locate Shibboleth-aware identity provider role for provider ($entityID)", namedparams(1, "entityID", entityID));
288 else if (artifact && !SPConfig::getConfig().getArtifactResolver()->isSupported(dynamic_cast<const SSODescriptorType&>(*entity.second))) {
289 m_log.warn("artifact profile selected for response, but identity provider lacks support");
291 return make_pair(false,0L);
292 throw MetadataException("Identity provider ($entityID) lacks SAML artifact support.", namedparams(1, "entityID", entityID));
295 const EndpointType* ep=EndpointManager<SingleSignOnService>(
296 dynamic_cast<const IDPSSODescriptor*>(entity.second)->getSingleSignOnServices()
297 ).getByBinding(shibspconstants::SHIB1_AUTHNREQUEST_PROFILE_URI);
299 m_log.warn("unable to locate compatible SSO service for provider (%s)", entityID);
301 return make_pair(false,0L);
302 throw MetadataException("Unable to locate compatible SSO service for provider ($entityID)", namedparams(1, "entityID", entityID));
305 preserveRelayState(app, httpResponse, relayState);
307 // Shib 1.x requires a target value.
308 if (relayState.empty())
309 relayState = "default";
312 sprintf(timebuf,"%lu",time(NULL));
313 const URLEncoder* urlenc = XMLToolingConfig::getConfig().getURLEncoder();
314 auto_ptr_char dest(ep->getLocation());
315 string req=string(dest.get()) + (strchr(dest.get(),'?') ? '&' : '?') + "shire=" + urlenc->encode(acsLocation) +
316 "&time=" + timebuf + "&target=" + urlenc->encode(relayState.c_str()) +
317 "&providerId=" + urlenc->encode(app.getRelyingParty(entity.first)->getString("entityID").second);
320 // If the request object is available, we're responsible for the POST data.
321 preservePostData(app, *httpRequest, httpResponse, relayState.c_str());
324 return make_pair(true, httpResponse.sendRedirect(req.c_str()));
326 return make_pair(false,0L);