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 const PropertySet* sessions=app ? app->getPropertySet("Sessions") : NULL;
53 pair<bool,const char*> redirectErrors = sessions ? sessions->getString("redirectErrors") : pair<bool,const char*>(false,NULL);
54 if (redirectErrors.first) {
55 string loc(redirectErrors.second);
56 loc = loc + '?' + tp.toQueryString();
57 return request.sendRedirect(loc.c_str());
61 request.setContentType("text/html");
62 request.setResponseHeader("Expires","01-Jan-1997 12:00:00 GMT");
63 request.setResponseHeader("Cache-Control","private,no-store,no-cache");
65 const PropertySet* props=app ? app->getPropertySet("Errors") : NULL;
67 pair<bool,const char*> p=props->getString(page);
69 ifstream infile(p.second);
71 tp.setPropertySet(props);
73 XMLToolingConfig::getConfig().getTemplateEngine()->run(infile, str, tp, tp.getRichException());
74 return request.sendResponse(str);
77 else if (!strcmp(page,"access")) {
78 istringstream msg("Access Denied");
79 return request.sendResponse(msg, HTTPResponse::XMLTOOLING_HTTP_STATUS_FORBIDDEN);
83 string errstr = string("sendError could not process error template (") + page + ")";
84 request.log(SPRequest::SPError, errstr);
85 istringstream msg("Internal Server Error. Please contact the site administrator.");
86 return request.sendError(msg);
89 void SHIBSP_DLLLOCAL clearHeaders(SPRequest& request) {
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-Attributes", "HTTP_SHIB_ATTRIBUTES");
95 request.clearHeader("Shib-Assertion-Count", "HTTP_SHIB_ASSERTION_COUNT");
96 request.clearHeader("REMOTE_USER", "HTTP_REMOTE_USER");
97 //request.clearHeader("Shib-Application-ID"); handle inside app method
98 request.getApplication().clearAttributeHeaders(request);
102 void SHIBSP_API shibsp::registerServiceProviders()
104 SPConfig::getConfig().ServiceProviderManager.registerFactory(XML_SERVICE_PROVIDER, XMLServiceProviderFactory);
107 pair<bool,long> ServiceProvider::doAuthentication(SPRequest& request, bool handler) const
110 xmltooling::NDC ndc("doAuthentication");
113 const Application* app=NULL;
114 string targetURL = request.getRequestURL();
117 RequestMapper::Settings settings = request.getRequestSettings();
118 app = &(request.getApplication());
120 // If not SSL, check to see if we should block or redirect it.
121 if (!request.isSecure()) {
122 pair<bool,const char*> redirectToSSL = settings.first->getString("redirectToSSL");
123 if (redirectToSSL.first) {
124 #ifdef HAVE_STRCASECMP
125 if (!strcasecmp("GET",request.getMethod()) || !strcasecmp("HEAD",request.getMethod())) {
127 if (!stricmp("GET",request.getMethod()) || !stricmp("HEAD",request.getMethod())) {
129 // Compute the new target URL
130 string redirectURL = string("https://") + request.getHostname();
131 if (strcmp(redirectToSSL.second,"443")) {
132 redirectURL = redirectURL + ':' + redirectToSSL.second;
134 redirectURL += request.getRequestURI();
135 return make_pair(true, request.sendRedirect(redirectURL.c_str()));
138 TemplateParameters tp;
139 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
140 return make_pair(true,sendError(request, app, "ssl", tp));
145 const char* handlerURL=request.getHandlerURL(targetURL.c_str());
147 throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
149 // If the request URL contains the handler base URL for this application, either dispatch
150 // directly (mainly Apache 2.0) or just pass back control.
151 if (strstr(targetURL.c_str(),handlerURL)) {
153 return doHandler(request);
155 return make_pair(true, request.returnOK());
158 // Three settings dictate how to proceed.
159 pair<bool,const char*> authType = settings.first->getString("authType");
160 pair<bool,bool> requireSession = settings.first->getBool("requireSession");
161 pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
163 // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
164 // then we ignore this request and consider it unprotected. Apache might lie to us if
165 // ShibBasicHijack is on, but that's up to it.
166 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
167 #ifdef HAVE_STRCASECMP
168 (!authType.first || strcasecmp(authType.second,"shibboleth")))
170 (!authType.first || _stricmp(authType.second,"shibboleth")))
172 return make_pair(true,request.returnDecline());
174 // Fix for secadv 20050901
175 clearHeaders(request);
177 Session* session = NULL;
179 session = request.getSession();
181 catch (exception& e) {
182 request.log(SPRequest::SPWarn, string("error during session lookup: ") + e.what());
183 // If it's not a retryable session failure, we throw to the outer handler for reporting.
184 if (dynamic_cast<opensaml::RetryableProfileException*>(&e)==NULL)
189 // No session. Maybe that's acceptable?
190 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first)
191 return make_pair(true,request.returnOK());
193 // No session, but we require one. Initiate a new session using the indicated method.
194 const Handler* initiator=NULL;
195 if (requireSessionWith.first) {
196 initiator=app->getSessionInitiatorById(requireSessionWith.second);
198 throw ConfigurationException(
199 "No session initiator found with id ($1), check requireSessionWith command.",
200 params(1,requireSessionWith.second)
204 initiator=app->getDefaultSessionInitiator();
206 throw ConfigurationException("No default session initiator found, check configuration.");
209 return initiator->run(request,false);
212 // We're done. Everything is okay. Nothing to report. Nothing to do..
213 // Let the caller decide how to proceed.
214 request.log(SPRequest::SPDebug, "doAuthentication succeeded");
215 return make_pair(false,0);
217 catch (exception& e) {
218 TemplateParameters tp(&e);
219 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
220 return make_pair(true,sendError(request, app, "session", tp));
224 TemplateParameters tp;
225 tp.m_map["errorType"] = "Unexpected Error";
226 tp.m_map["errorText"] = "Caught an unknown exception.";
227 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
228 return make_pair(true,sendError(request, app, "session", tp));
233 pair<bool,long> ServiceProvider::doAuthorization(SPRequest& request) const
236 xmltooling::NDC ndc("doAuthorization");
239 const Application* app=NULL;
240 string targetURL = request.getRequestURL();
243 RequestMapper::Settings settings = request.getRequestSettings();
244 app = &(request.getApplication());
246 // Three settings dictate how to proceed.
247 pair<bool,const char*> authType = settings.first->getString("authType");
248 pair<bool,bool> requireSession = settings.first->getBool("requireSession");
249 pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
251 // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
252 // then we ignore this request and consider it unprotected. Apache might lie to us if
253 // ShibBasicHijack is on, but that's up to it.
254 if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
255 #ifdef HAVE_STRCASECMP
256 (!authType.first || strcasecmp(authType.second,"shibboleth")))
258 (!authType.first || _stricmp(authType.second,"shibboleth")))
260 return make_pair(true,request.returnDecline());
262 // Do we have an access control plugin?
263 if (settings.second) {
264 const Session* session = NULL;
266 session = request.getSession(false);
268 catch (exception& e) {
269 request.log(SPRequest::SPWarn, string("unable to obtain session to pass to access control provider: ") + e.what());
272 Locker acllock(settings.second);
273 if (settings.second->authorized(request,session)) {
274 // Let the caller decide how to proceed.
275 request.log(SPRequest::SPDebug, "access control provider granted access");
276 return make_pair(false,0);
279 request.log(SPRequest::SPWarn, "access control provider denied access");
280 TemplateParameters tp;
281 tp.m_map["requestURL"] = targetURL;
282 return make_pair(true,sendError(request, app, "access", tp));
284 return make_pair(false,0);
287 return make_pair(true,request.returnDecline());
289 catch (exception& e) {
290 TemplateParameters tp(&e);
291 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
292 return make_pair(true,sendError(request, app, "access", tp));
296 TemplateParameters tp;
297 tp.m_map["errorType"] = "Unexpected Error";
298 tp.m_map["errorText"] = "Caught an unknown exception.";
299 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
300 return make_pair(true,sendError(request, app, "access", tp));
305 pair<bool,long> ServiceProvider::doExport(SPRequest& request, bool requireSession) const
308 xmltooling::NDC ndc("doExport");
311 const Application* app=NULL;
312 string targetURL = request.getRequestURL();
315 RequestMapper::Settings settings = request.getRequestSettings();
316 app = &(request.getApplication());
318 const Session* session = NULL;
320 session = request.getSession(false);
322 catch (exception& e) {
323 request.log(SPRequest::SPWarn, string("unable to obtain session to export to request: ") + e.what());
324 // If we have to have a session, then this is a fatal error.
332 throw opensaml::RetryableProfileException("Unable to obtain session to export to request.");
334 return make_pair(false,0); // just bail silently
337 request.setHeader("Shib-Application-ID", app->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";
362 const char* handlerURL=request.getHandlerURL(targetURL.c_str());
363 string baseURL = string(handlerURL) + exportLocation.second + "?key=" + session->getID() + "&ID=";
364 const vector<const char*>& tokens = session->getAssertionIDs();
365 vector<const char*>::size_type count = 0;
366 for (vector<const char*>::const_iterator tokenids = tokens.begin(); tokenids!=tokens.end(); ++tokenids) {
368 *(exportName.rbegin()) = '0' + (count%10);
369 *(++exportName.rbegin()) = '0' + (count/10);
370 string fullURL = baseURL + encoder->encode(*tokenids);
371 request.setHeader(exportName.c_str(), fullURL.c_str());
373 request.setHeader("Shib-Assertion-Count", exportName.c_str() + 15);
377 // Export the attributes.
378 bool remoteUserSet = false;
379 const multimap<string,Attribute*>& attributes = session->getAttributes();
380 for (multimap<string,Attribute*>::const_iterator a = attributes.begin(); a!=attributes.end(); ++a) {
381 const vector<string>& vals = a->second->getSerializedValues();
383 // See if this needs to be set as the REMOTE_USER value.
384 if (!remoteUserSet && !vals.empty() && app->getRemoteUserAttributeIds().count(a->first)) {
385 request.setRemoteUser(vals.front().c_str());
386 remoteUserSet = true;
389 // Handle the normal export case.
390 string header(request.getSecureHeader(a->first.c_str()));
391 for (vector<string>::const_iterator v = vals.begin(); v!=vals.end(); ++v) {
394 string::size_type pos = v->find_first_of(';',string::size_type(0));
395 if (pos!=string::npos) {
397 for (; pos != string::npos; pos = value.find_first_of(';',pos)) {
398 value.insert(pos, "\\");
407 request.setHeader(a->first.c_str(), header.c_str());
410 return make_pair(false,0);
412 catch (exception& e) {
413 TemplateParameters tp(&e);
414 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
415 return make_pair(true,sendError(request, app, "session", tp));
419 TemplateParameters tp;
420 tp.m_map["errorType"] = "Unexpected Error";
421 tp.m_map["errorText"] = "Caught an unknown exception.";
422 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
423 return make_pair(true,sendError(request, app, "session", tp));
428 pair<bool,long> ServiceProvider::doHandler(SPRequest& request) const
431 xmltooling::NDC ndc("doHandler");
434 const Application* app=NULL;
435 string targetURL = request.getRequestURL();
438 RequestMapper::Settings settings = request.getRequestSettings();
439 app = &(request.getApplication());
441 const char* handlerURL=request.getHandlerURL(targetURL.c_str());
443 throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
445 // Make sure we only process handler requests.
446 if (!strstr(targetURL.c_str(),handlerURL))
447 return make_pair(true, request.returnDecline());
449 const PropertySet* sessionProps=app->getPropertySet("Sessions");
451 throw ConfigurationException("Unable to map request to application session settings, check configuration.");
453 // Process incoming request.
454 pair<bool,bool> handlerSSL=sessionProps->getBool("handlerSSL");
456 // Make sure this is SSL, if it should be
457 if ((!handlerSSL.first || handlerSSL.second) && !request.isSecure())
458 throw opensaml::FatalProfileException("Blocked non-SSL access to Shibboleth handler.");
460 // We dispatch based on our path info. We know the request URL begins with or equals the handler URL,
461 // so the path info is the next character (or null).
462 const Handler* handler=app->getHandler(targetURL.c_str() + strlen(handlerURL));
464 throw ConfigurationException("Shibboleth handler invoked at an unconfigured location.");
466 pair<bool,long> hret=handler->run(request);
468 // Did the handler run successfully?
472 throw ConfigurationException("Configured Shibboleth handler failed to process the request.");
474 catch (opensaml::saml2md::MetadataException& e) {
475 TemplateParameters tp(&e);
476 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
477 // See if a metadata error page is installed.
478 const PropertySet* props=app ? app->getPropertySet("Errors") : NULL;
480 pair<bool,const char*> p=props->getString("metadata");
482 return make_pair(true,sendError(request, app, "metadata", tp, true));
484 return make_pair(true,sendError(request, app, "session", tp, true));
486 catch (exception& e) {
487 TemplateParameters tp(&e);
488 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
489 return make_pair(true,sendError(request, app, "session", tp, true));
493 TemplateParameters tp;
494 tp.m_map["errorType"] = "Unexpected Error";
495 tp.m_map["errorText"] = "Caught an unknown exception.";
496 tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
497 return make_pair(true,sendError(request, app, "session", tp, true));