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.
20 * Interface to a Shibboleth ServiceProvider instance.
24 #include "exceptions.h"
25 #include "AccessControl.h"
26 #include "Application.h"
27 #include "ServiceProvider.h"
28 #include "SessionCache.h"
29 #include "SPRequest.h"
30 #include "attribute/Attribute.h"
31 #include "handler/SessionInitiator.h"
32 #include "util/TemplateParameters.h"
36 #include <xmltooling/XMLToolingConfig.h>
37 #include <xmltooling/util/NDC.h>
38 #include <xmltooling/util/URLEncoder.h>
39 #include <xmltooling/util/XMLHelper.h>
41 using namespace shibsp;
42 using namespace xmltooling;
46 SHIBSP_DLLLOCAL PluginManager<ServiceProvider,string,const DOMElement*>::Factory XMLServiceProviderFactory;
48 long SHIBSP_DLLLOCAL sendError(SPRequest& request, const Application* app, const char* page, TemplateParameters& tp, bool mayRedirect=false)
51 // Check for redirection on errors instead of template.
52 pair<bool,const char*> redirectErrors = app ? app->getString("redirectErrors") : pair<bool,const char*>(false,NULL);
53 if (redirectErrors.first) {
54 string loc(redirectErrors.second);
55 loc = loc + '?' + tp.toQueryString();
56 return request.sendRedirect(loc.c_str());
60 request.setContentType("text/html");
61 request.setResponseHeader("Expires","01-Jan-1997 12:00:00 GMT");
62 request.setResponseHeader("Cache-Control","private,no-store,no-cache");
64 const PropertySet* props=app ? app->getPropertySet("Errors") : NULL;
66 pair<bool,const char*> p=props->getString(page);
68 ifstream infile(p.second);
70 tp.setPropertySet(props);
72 XMLToolingConfig::getConfig().getTemplateEngine()->run(infile, str, tp, tp.getRichException());
73 return request.sendResponse(str);
76 else if (!strcmp(page,"access")) {
77 istringstream msg("Access Denied");
78 return request.sendResponse(msg, HTTPResponse::XMLTOOLING_HTTP_STATUS_FORBIDDEN);
82 string errstr = string("sendError could not process error template (") + page + ")";
83 request.log(SPRequest::SPError, errstr);
84 istringstream msg("Internal Server Error. Please contact the site administrator.");
85 return request.sendError(msg);
88 void SHIBSP_DLLLOCAL clearHeaders(SPRequest& request) {
89 request.clearHeader("Shib-Session-ID", "HTTP_SHIB_SESSION_ID");
90 request.clearHeader("Shib-Identity-Provider", "HTTP_SHIB_IDENTITY_PROVIDER");
91 request.clearHeader("Shib-Authentication-Method", "HTTP_SHIB_AUTHENTICATION_METHOD");
92 request.clearHeader("Shib-AuthnContext-Class", "HTTP_SHIB_AUTHNCONTEXT_CLASS");
93 request.clearHeader("Shib-AuthnContext-Decl", "HTTP_SHIB_AUTHNCONTEXT_DECL");
94 request.clearHeader("Shib-Assertion-Count", "HTTP_SHIB_ASSERTION_COUNT");
95 request.clearHeader("REMOTE_USER", "HTTP_REMOTE_USER");
96 //request.clearHeader("Shib-Application-ID"); handle inside app method
97 request.getApplication().clearAttributeHeaders(request);
101 void SHIBSP_API shibsp::registerServiceProviders()
103 SPConfig::getConfig().ServiceProviderManager.registerFactory(XML_SERVICE_PROVIDER, XMLServiceProviderFactory);
106 pair<bool,long> ServiceProvider::doAuthentication(SPRequest& request, bool handler) const
109 xmltooling::NDC ndc("doAuthentication");
112 const Application* app=NULL;
113 string targetURL = request.getRequestURL();
116 RequestMapper::Settings settings = request.getRequestSettings();
117 app = &(request.getApplication());
119 // If not SSL, check to see if we should block or redirect it.
120 if (!request.isSecure()) {
121 pair<bool,const char*> redirectToSSL = settings.first->getString("redirectToSSL");
122 if (redirectToSSL.first) {
123 #ifdef HAVE_STRCASECMP
124 if (!strcasecmp("GET",request.getMethod()) || !strcasecmp("HEAD",request.getMethod())) {
126 if (!stricmp("GET",request.getMethod()) || !stricmp("HEAD",request.getMethod())) {
128 // Compute the new target URL
129 string redirectURL = string("https://") + request.getHostname();
130 if (strcmp(redirectToSSL.second,"443")) {
131 redirectURL = redirectURL + ':' + redirectToSSL.second;
133 redirectURL += request.getRequestURI();
134 return make_pair(true, request.sendRedirect(redirectURL.c_str()));
137 TemplateParameters tp;
138 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
139 return make_pair(true,sendError(request, app, "ssl", tp));
144 const char* handlerURL=request.getHandlerURL(targetURL.c_str());
146 throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
148 // If the request URL contains the handler base URL for this application, either dispatch
149 // directly (mainly Apache 2.0) or just pass back control.
150 if (strstr(targetURL.c_str(),handlerURL)) {
152 return doHandler(request);
154 return make_pair(true, request.returnOK());
157 // Three settings dictate how to proceed.
158 pair<bool,const char*> authType = settings.first->getString("authType");
159 pair<bool,bool> requireSession = settings.first->getBool("requireSession");
160 pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
162 // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
163 // then we ignore this request and consider it unprotected. Apache might lie to us if
164 // ShibBasicHijack is on, but that's up to it.
165 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
166 #ifdef HAVE_STRCASECMP
167 (!authType.first || strcasecmp(authType.second,"shibboleth")))
169 (!authType.first || _stricmp(authType.second,"shibboleth")))
171 return make_pair(true,request.returnDecline());
173 // Fix for secadv 20050901
174 clearHeaders(request);
176 Session* session = NULL;
178 session = request.getSession();
180 catch (exception& e) {
181 request.log(SPRequest::SPWarn, string("error during session lookup: ") + e.what());
182 // If it's not a retryable session failure, we throw to the outer handler for reporting.
183 if (dynamic_cast<opensaml::RetryableProfileException*>(&e)==NULL)
188 // No session. Maybe that's acceptable?
189 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first)
190 return make_pair(true,request.returnOK());
192 // No session, but we require one. Initiate a new session using the indicated method.
193 const Handler* initiator=NULL;
194 if (requireSessionWith.first) {
195 initiator=app->getSessionInitiatorById(requireSessionWith.second);
197 throw ConfigurationException(
198 "No session initiator found with id ($1), check requireSessionWith command.",
199 params(1,requireSessionWith.second)
203 initiator=app->getDefaultSessionInitiator();
205 throw ConfigurationException("No default session initiator found, check configuration.");
208 return initiator->run(request,false);
211 // We're done. Everything is okay. Nothing to report. Nothing to do..
212 // Let the caller decide how to proceed.
213 request.log(SPRequest::SPDebug, "doAuthentication succeeded");
214 return make_pair(false,0);
216 catch (exception& e) {
217 TemplateParameters tp(&e);
218 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
219 return make_pair(true,sendError(request, app, "session", tp));
223 TemplateParameters tp;
224 tp.m_map["errorType"] = "Unexpected Error";
225 tp.m_map["errorText"] = "Caught an unknown exception.";
226 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
227 return make_pair(true,sendError(request, app, "session", tp));
232 pair<bool,long> ServiceProvider::doAuthorization(SPRequest& request) const
235 xmltooling::NDC ndc("doAuthorization");
238 const Application* app=NULL;
239 string targetURL = request.getRequestURL();
242 RequestMapper::Settings settings = request.getRequestSettings();
243 app = &(request.getApplication());
245 // Three settings dictate how to proceed.
246 pair<bool,const char*> authType = settings.first->getString("authType");
247 pair<bool,bool> requireSession = settings.first->getBool("requireSession");
248 pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
250 // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
251 // then we ignore this request and consider it unprotected. Apache might lie to us if
252 // ShibBasicHijack is on, but that's up to it.
253 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
254 #ifdef HAVE_STRCASECMP
255 (!authType.first || strcasecmp(authType.second,"shibboleth")))
257 (!authType.first || _stricmp(authType.second,"shibboleth")))
259 return make_pair(true,request.returnDecline());
261 // Do we have an access control plugin?
262 if (settings.second) {
263 const Session* session = NULL;
265 session = request.getSession(false);
267 catch (exception& e) {
268 request.log(SPRequest::SPWarn, string("unable to obtain session to pass to access control provider: ") + e.what());
271 Locker acllock(settings.second);
272 if (settings.second->authorized(request,session)) {
273 // Let the caller decide how to proceed.
274 request.log(SPRequest::SPDebug, "access control provider granted access");
275 return make_pair(false,0);
278 request.log(SPRequest::SPWarn, "access control provider denied access");
279 TemplateParameters tp;
280 tp.m_map["requestURL"] = targetURL;
281 return make_pair(true,sendError(request, app, "access", tp));
283 return make_pair(false,0);
286 return make_pair(true,request.returnDecline());
288 catch (exception& e) {
289 TemplateParameters tp(&e);
290 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
291 return make_pair(true,sendError(request, app, "access", tp));
295 TemplateParameters tp;
296 tp.m_map["errorType"] = "Unexpected Error";
297 tp.m_map["errorText"] = "Caught an unknown exception.";
298 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
299 return make_pair(true,sendError(request, app, "access", tp));
304 pair<bool,long> ServiceProvider::doExport(SPRequest& request, bool requireSession) const
307 xmltooling::NDC ndc("doExport");
310 const Application* app=NULL;
311 string targetURL = request.getRequestURL();
314 RequestMapper::Settings settings = request.getRequestSettings();
315 app = &(request.getApplication());
317 const Session* session = NULL;
319 session = request.getSession(false);
321 catch (exception& e) {
322 request.log(SPRequest::SPWarn, string("unable to obtain session to export to request: ") + e.what());
323 // If we have to have a session, then this is a fatal error.
331 throw opensaml::RetryableProfileException("Unable to obtain session to export to request.");
333 return make_pair(false,0); // just bail silently
336 request.setHeader("Shib-Application-ID", app->getId());
337 request.setHeader("Shib-Session-ID", session->getID());
339 // Export the IdP name and Authn method/context info.
340 const char* hval = session->getEntityID();
342 request.setHeader("Shib-Identity-Provider", hval);
343 hval = session->getAuthnContextClassRef();
345 request.setHeader("Shib-Authentication-Method", hval);
346 request.setHeader("Shib-AuthnContext-Class", hval);
348 hval = session->getAuthnContextDeclRef();
350 request.setHeader("Shib-AuthnContext-Decl", hval);
352 // Maybe export the assertion keys.
353 pair<bool,bool> exp=settings.first->getBool("exportAssertion");
354 if (exp.first && exp.second) {
355 const PropertySet* sessions=app->getPropertySet("Sessions");
356 pair<bool,const char*> exportLocation = sessions ? sessions->getString("exportLocation") : pair<bool,const char*>(false,NULL);
357 if (!exportLocation.first)
358 request.log(SPRequest::SPWarn, "can't export assertions without an exportLocation Sessions property");
360 const URLEncoder* encoder = XMLToolingConfig::getConfig().getURLEncoder();
361 string exportName = "Shib-Assertion-00";
363 if (!strncmp(exportLocation.second, "http", 4))
364 baseURL = exportLocation.second;
366 baseURL = string(request.getHandlerURL(targetURL.c_str())) + exportLocation.second;
367 baseURL = baseURL + "?key=" + session->getID() + "&ID=";
368 const vector<const char*>& tokens = session->getAssertionIDs();
369 vector<const char*>::size_type count = 0;
370 for (vector<const char*>::const_iterator tokenids = tokens.begin(); tokenids!=tokens.end(); ++tokenids) {
372 *(exportName.rbegin()) = '0' + (count%10);
373 *(++exportName.rbegin()) = '0' + (count/10);
374 string fullURL = baseURL + encoder->encode(*tokenids);
375 request.setHeader(exportName.c_str(), fullURL.c_str());
377 request.setHeader("Shib-Assertion-Count", exportName.c_str() + 15);
381 // Export the attributes.
382 bool remoteUserSet = false;
383 const multimap<string,const Attribute*>& attributes = session->getIndexedAttributes();
384 for (multimap<string,const Attribute*>::const_iterator a = attributes.begin(); a!=attributes.end(); ++a) {
385 const vector<string>& vals = a->second->getSerializedValues();
387 // See if this needs to be set as the REMOTE_USER value.
388 if (!remoteUserSet && !vals.empty() && app->getRemoteUserAttributeIds().count(a->first)) {
389 request.setRemoteUser(vals.front().c_str());
390 remoteUserSet = true;
393 // Handle the normal export case.
394 string header(request.getSecureHeader(a->first.c_str()));
395 for (vector<string>::const_iterator v = vals.begin(); v!=vals.end(); ++v) {
398 string::size_type pos = v->find_first_of(';',string::size_type(0));
399 if (pos!=string::npos) {
401 for (; pos != string::npos; pos = value.find_first_of(';',pos)) {
402 value.insert(pos, "\\");
411 request.setHeader(a->first.c_str(), header.c_str());
414 return make_pair(false,0);
416 catch (exception& e) {
417 TemplateParameters tp(&e);
418 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
419 return make_pair(true,sendError(request, app, "session", tp));
423 TemplateParameters tp;
424 tp.m_map["errorType"] = "Unexpected Error";
425 tp.m_map["errorText"] = "Caught an unknown exception.";
426 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
427 return make_pair(true,sendError(request, app, "session", tp));
432 pair<bool,long> ServiceProvider::doHandler(SPRequest& request) const
435 xmltooling::NDC ndc("doHandler");
438 const Application* app=NULL;
439 string targetURL = request.getRequestURL();
442 RequestMapper::Settings settings = request.getRequestSettings();
443 app = &(request.getApplication());
445 const char* handlerURL=request.getHandlerURL(targetURL.c_str());
447 throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
449 // Make sure we only process handler requests.
450 if (!strstr(targetURL.c_str(),handlerURL))
451 return make_pair(true, request.returnDecline());
453 const PropertySet* sessionProps=app->getPropertySet("Sessions");
455 throw ConfigurationException("Unable to map request to application session settings, check configuration.");
457 // Process incoming request.
458 pair<bool,bool> handlerSSL=sessionProps->getBool("handlerSSL");
460 // Make sure this is SSL, if it should be
461 if ((!handlerSSL.first || handlerSSL.second) && !request.isSecure())
462 throw opensaml::FatalProfileException("Blocked non-SSL access to Shibboleth handler.");
464 // We dispatch based on our path info. We know the request URL begins with or equals the handler URL,
465 // so the path info is the next character (or null).
466 const Handler* handler=app->getHandler(targetURL.c_str() + strlen(handlerURL));
468 throw ConfigurationException("Shibboleth handler invoked at an unconfigured location.");
470 pair<bool,long> hret=handler->run(request);
472 // Did the handler run successfully?
476 throw ConfigurationException("Configured Shibboleth handler failed to process the request.");
478 catch (opensaml::saml2md::MetadataException& e) {
479 TemplateParameters tp(&e);
480 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
481 // See if a metadata error page is installed.
482 const PropertySet* props=app ? app->getPropertySet("Errors") : NULL;
484 pair<bool,const char*> p=props->getString("metadata");
486 return make_pair(true,sendError(request, app, "metadata", tp, true));
488 return make_pair(true,sendError(request, app, "session", tp, true));
490 catch (exception& e) {
491 TemplateParameters tp(&e);
492 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
493 return make_pair(true,sendError(request, app, "session", tp, true));
497 TemplateParameters tp;
498 tp.m_map["errorType"] = "Unexpected Error";
499 tp.m_map["errorText"] = "Caught an unknown exception.";
500 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
501 return make_pair(true,sendError(request, app, "session", tp, true));