2 * Copyright 2001-2005 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.
17 /* nsapi_shib.cpp - Shibboleth NSAPI filter
23 #include "config_win32.h"
26 #include <saml/saml.h>
27 #include <shib/shib.h>
28 #include <shib/shib-threads.h>
29 #include <shib-target/shib-target.h>
53 using namespace shibboleth;
54 using namespace shibtarget;
56 // macros to output text to client
57 #define NET_WRITE(str) \
58 if (IO_ERROR==net_write(sn->csd,str,strlen(str))) return REQ_EXIT
61 ShibTargetConfig* g_Config=NULL;
63 string g_ServerScheme;
66 PlugManager::Factory SunRequestMapFactory;
68 extern "C" NSAPI_PUBLIC void nsapi_shib_exit(void*)
75 extern "C" NSAPI_PUBLIC int nsapi_shib_init(pblock* pb, Session* sn, Request* rq)
77 // Save off a default hostname for this virtual server.
78 char* name=pblock_findval("server-name",pb);
92 pblock_nvinsert("error","unable to determine web server hostname",pb);
97 name=pblock_findval("server-scheme",pb);
101 log_error(LOG_INFORM,"nsapi_shib_init",sn,rq,"nsapi_shib loaded for host (%s)",g_ServerName.c_str());
106 const char* schemadir=pblock_findval("shib-schemas",pb);
108 schemadir=getenv("SHIBSCHEMAS");
110 schemadir=SHIB_SCHEMAS;
111 const char* config=pblock_findval("shib-config",pb);
113 config=getenv("SHIBCONFIG");
116 g_Config=&ShibTargetConfig::getConfig();
117 g_Config->setFeatures(
118 ShibTargetConfig::Listener |
119 ShibTargetConfig::Caching |
120 ShibTargetConfig::Metadata |
121 ShibTargetConfig::AAP |
122 ShibTargetConfig::RequestMapper |
123 ShibTargetConfig::InProcess |
124 ShibTargetConfig::Logging
126 if (!g_Config->init(schemadir)) {
128 pblock_nvinsert("error","unable to initialize Shibboleth libraries",pb);
132 SAMLConfig::getConfig().getPlugMgr().regFactory(shibtarget::XML::NativeRequestMapType,&SunRequestMapFactory);
133 // We hijack the legacy type so that 1.2 config files will load this plugin
134 SAMLConfig::getConfig().getPlugMgr().regFactory(shibtarget::XML::LegacyRequestMapType,&SunRequestMapFactory);
136 if (!g_Config->load(config)) {
138 pblock_nvinsert("error","unable to initialize load Shibboleth configuration",pb);
142 daemon_atrestart(nsapi_shib_exit,NULL);
147 pblock_nvinsert("error","caught exception, unable to initialize Shibboleth libraries",pb);
154 /********************************************************************************/
155 // NSAPI Shib Target Subclass
157 class ShibTargetNSAPI : public ShibTarget
159 mutable string m_body;
160 mutable bool m_gotBody;
162 ShibTargetNSAPI(pblock* pb, Session* sn, Request* rq) : m_gotBody(false) {
167 // Get everything but hostname...
168 const char* uri=pblock_findval("uri", rq->reqpb);
169 const char* qstr=pblock_findval("query", rq->reqpb);
170 int port=server_portnum;
171 const char* scheme=security_active ? "https" : "http";
172 const char* host=NULL;
178 url=url + '?' + qstr;
180 #ifdef vs_is_default_vs
181 // This is 6.0 or later, so we can distinguish requests to name-based vhosts.
182 if (!vs_is_default_vs)
183 // The beauty here is, a non-default vhost can *only* be accessed if the client
184 // specified the exact name in the Host header. So we can trust the Host header.
185 host=pblock_findval("host", rq->headers);
188 // In other cases, we're going to rely on the initialization process...
189 host=g_ServerName.c_str();
191 char* content_type = "";
192 request_header("content-type", &content_type, sn, rq);
194 const char *remote_ip = pblock_findval("ip", sn->client);
195 const char *method = pblock_findval("method", rq->reqpb);
197 init(scheme, host, port, url.c_str(), content_type, remote_ip, method);
199 ~ShibTargetNSAPI() {}
201 virtual void log(ShibLogLevel level, const string &msg) {
202 ShibTarget::log(level,msg);
203 if (level==LogLevelError)
204 log_error(LOG_FAILURE, "nsapi_shib", m_sn, m_rq, const_cast<char*>(msg.c_str()));
206 virtual string getCookies(void) const {
207 char *cookies = NULL;
208 if (request_header("cookie", &cookies, m_sn, m_rq) == REQ_ABORTED)
209 throw("error accessing cookie header");
210 return string(cookies ? cookies : "");
212 virtual void setCookie(const string &name, const string &value) {
213 string cookie = name + '=' + value;
214 pblock_nvinsert("Set-Cookie", cookie.c_str(), m_rq->srvhdrs);
216 virtual const char* getQueryString() const {
217 return pblock_findval("query", m_rq->reqpb);
219 virtual const char* getRequestBody() const {
221 return m_body.c_str();
222 char* content_length=NULL;
223 if (request_header("content-length", &content_length, m_sn, m_rq)!=REQ_PROCEED ||
224 atoi(content_length) > 1024*1024) // 1MB?
225 throw SAMLException("Blocked POST request body exceeding size limit.");
228 int cl=atoi(content_length);
230 while (cl && ch != IO_EOF) {
231 ch=netbuf_getc(m_sn->inbuf);
239 throw SAMLException("Error reading POST request body from browser.");
240 return m_body.c_str();
243 virtual void clearHeader(const string &name) {
244 if (name=="REMOTE_USER") {
245 param_free(pblock_remove("auth-user",m_rq->vars));
246 param_free(pblock_remove("remote-user",m_rq->headers));
249 param_free(pblock_remove(name.c_str(), m_rq->headers));
251 virtual void setHeader(const string &name, const string &value) {
252 pblock_nvinsert(name.c_str(), value.c_str() ,m_rq->headers);
254 virtual string getHeader(const string &name) {
256 if (request_header(const_cast<char*>(name.c_str()), &hdr, m_sn, m_rq) != REQ_PROCEED)
258 return string(hdr ? hdr : "");
260 virtual void setRemoteUser(const string &user) {
261 pblock_nvinsert("remote-user", user.c_str(), m_rq->headers);
262 pblock_nvinsert("auth-user", user.c_str(), m_rq->vars);
264 virtual string getRemoteUser(void) {
265 return getHeader("remote-user");
268 virtual void* sendPage(
271 const string& content_type="text/html",
272 const saml::Iterator<header_t>& headers=EMPTY(header_t)
274 param_free(pblock_remove("content-type", m_rq->srvhdrs));
275 pblock_nvinsert("content-type", content_type.c_str(), m_rq->srvhdrs);
276 pblock_nninsert("content-length", msg.length(), m_rq->srvhdrs);
277 pblock_nvinsert("connection","close",m_rq->srvhdrs);
278 while (headers.hasNext()) {
279 const header_t& h=headers.next();
280 pblock_nvinsert(h.first.c_str(), h.second.c_str(), m_rq->srvhdrs);
282 protocol_status(m_sn, m_rq, code, NULL);
283 protocol_start_response(m_sn, m_rq);
284 net_write(m_sn->csd,const_cast<char*>(msg.c_str()),msg.length());
285 return (void*)REQ_EXIT;
287 virtual void* sendRedirect(const string& url) {
288 param_free(pblock_remove("content-type", m_rq->srvhdrs));
289 pblock_nninsert("content-length", 0, m_rq->srvhdrs);
290 pblock_nvinsert("expires", "01-Jan-1997 12:00:00 GMT", m_rq->srvhdrs);
291 pblock_nvinsert("cache-control", "private,no-store,no-cache", m_rq->srvhdrs);
292 pblock_nvinsert("location", url.c_str(), m_rq->srvhdrs);
293 pblock_nvinsert("connection","close",m_rq->srvhdrs);
294 protocol_status(m_sn, m_rq, PROTOCOL_REDIRECT, NULL);
295 protocol_start_response(m_sn, m_rq);
296 return (void*)REQ_ABORTED;
298 virtual void* returnDecline(void) { return (void*)REQ_NOACTION; }
299 virtual void* returnOK(void) { return (void*)REQ_PROCEED; }
306 /********************************************************************************/
308 int WriteClientError(Session* sn, Request* rq, char* func, char* msg)
310 log_error(LOG_FAILURE,func,sn,rq,msg);
311 protocol_status(sn,rq,PROTOCOL_SERVER_ERROR,msg);
316 #define FUNC "shibboleth"
317 extern "C" NSAPI_PUBLIC int nsapi_shib(pblock* pb, Session* sn, Request* rq)
319 ostringstream threadid;
320 threadid << "[" << getpid() << "] nsapi_shib" << '\0';
321 saml::NDC ndc(threadid.str().c_str());
324 ShibTargetNSAPI stn(pb, sn, rq);
326 // Check user authentication
327 pair<bool,void*> res = stn.doCheckAuthN();
328 if (res.first) return (int)res.second;
330 // user authN was okay -- export the assertions now
331 param_free(pblock_remove("auth-user",rq->vars));
332 // This seems to be required in order to eventually set
333 // the auth-user var.
334 pblock_nvinsert("auth-type","shibboleth",rq->vars);
335 res = stn.doExportAssertions();
336 if (res.first) return (int)res.second;
338 // Check the Authorization
339 res = stn.doCheckAuthZ();
340 if (res.first) return (int)res.second;
345 catch (SAMLException& e) {
346 log_error(LOG_FAILURE,FUNC,sn,rq,const_cast<char*>(e.what()));
347 return WriteClientError(sn, rq, FUNC, "Shibboleth filter threw an exception, see web server log for error.");
351 return WriteClientError(sn, rq, FUNC, "Shibboleth filter threw an uncaught exception.");
358 #define FUNC "shib_handler"
359 extern "C" NSAPI_PUBLIC int shib_handler(pblock* pb, Session* sn, Request* rq)
361 ostringstream threadid;
362 threadid << "[" << getpid() << "] shib_handler" << '\0';
363 saml::NDC ndc(threadid.str().c_str());
366 ShibTargetNSAPI stn(pb, sn, rq);
368 pair<bool,void*> res = stn.doHandler();
369 if (res.first) return (int)res.second;
371 return WriteClientError(sn, rq, FUNC, "Shibboleth handler did not do anything.");
373 catch (SAMLException& e) {
374 log_error(LOG_FAILURE,FUNC,sn,rq,const_cast<char*>(e.what()));
375 return WriteClientError(sn, rq, FUNC, "Shibboleth handler threw an exception, see web server log for error.");
379 return WriteClientError(sn, rq, FUNC, "Shibboleth handler threw an unknown exception.");
385 class SunRequestMapper : public virtual IRequestMapper, public virtual IPropertySet
388 SunRequestMapper(const DOMElement* e);
389 ~SunRequestMapper() { delete m_mapper; delete m_stKey; delete m_propsKey; }
390 void lock() { m_mapper->lock(); }
391 void unlock() { m_stKey->setData(NULL); m_propsKey->setData(NULL); m_mapper->unlock(); }
392 Settings getSettings(ShibTarget* st) const;
394 pair<bool,bool> getBool(const char* name, const char* ns=NULL) const;
395 pair<bool,const char*> getString(const char* name, const char* ns=NULL) const;
396 pair<bool,const XMLCh*> getXMLString(const char* name, const char* ns=NULL) const;
397 pair<bool,unsigned int> getUnsignedInt(const char* name, const char* ns=NULL) const;
398 pair<bool,int> getInt(const char* name, const char* ns=NULL) const;
399 const IPropertySet* getPropertySet(const char* name, const char* ns="urn:mace:shibboleth:target:config:1.0") const;
400 const DOMElement* getElement() const;
403 IRequestMapper* m_mapper;
405 ThreadKey* m_propsKey;
408 IPlugIn* SunRequestMapFactory(const DOMElement* e)
410 return new SunRequestMapper(e);
413 SunRequestMapper::SunRequestMapper(const DOMElement* e) : m_mapper(NULL), m_stKey(NULL), m_propsKey(NULL)
415 IPlugIn* p=SAMLConfig::getConfig().getPlugMgr().newPlugin(shibtarget::XML::XMLRequestMapType,e);
416 m_mapper=dynamic_cast<IRequestMapper*>(p);
419 throw UnsupportedExtensionException("Embedded request mapper plugin was not of correct type.");
421 m_stKey=ThreadKey::create(NULL);
422 m_propsKey=ThreadKey::create(NULL);
425 IRequestMapper::Settings SunRequestMapper::getSettings(ShibTarget* st) const
427 Settings s=m_mapper->getSettings(st);
428 m_stKey->setData(dynamic_cast<ShibTargetNSAPI*>(st));
429 m_propsKey->setData((void*)s.first);
430 return pair<const IPropertySet*,IAccessControl*>(this,s.second);
433 pair<bool,bool> SunRequestMapper::getBool(const char* name, const char* ns) const
435 ShibTargetNSAPI* stn=reinterpret_cast<ShibTargetNSAPI*>(m_stKey->getData());
436 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
437 if (stn && !ns && name) {
438 // Override boolean properties.
439 const char* param=pblock_findval(name,stn->m_pb);
440 if (param && (!strcmp(param,"1") || !strcasecmp(param,"true")))
441 return make_pair(true,true);
443 return s ? s->getBool(name,ns) : make_pair(false,false);
446 pair<bool,const char*> SunRequestMapper::getString(const char* name, const char* ns) const
448 ShibTargetNSAPI* stn=reinterpret_cast<ShibTargetNSAPI*>(m_stKey->getData());
449 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
450 if (stn && !ns && name) {
451 // Override string properties.
452 if (!strcmp(name,"authType"))
453 return pair<bool,const char*>(true,"shibboleth");
455 const char* param=pblock_findval(name,stn->m_pb);
457 return make_pair(true,param);
460 return s ? s->getString(name,ns) : pair<bool,const char*>(false,NULL);
463 pair<bool,const XMLCh*> SunRequestMapper::getXMLString(const char* name, const char* ns) const
465 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
466 return s ? s->getXMLString(name,ns) : pair<bool,const XMLCh*>(false,NULL);
469 pair<bool,unsigned int> SunRequestMapper::getUnsignedInt(const char* name, const char* ns) const
471 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
472 return s ? s->getUnsignedInt(name,ns) : pair<bool,unsigned int>(false,0);
475 pair<bool,int> SunRequestMapper::getInt(const char* name, const char* ns) const
477 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
478 return s ? s->getInt(name,ns) : pair<bool,int>(false,0);
481 const IPropertySet* SunRequestMapper::getPropertySet(const char* name, const char* ns) const
483 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
484 return s ? s->getPropertySet(name,ns) : NULL;
487 const DOMElement* SunRequestMapper::getElement() const
489 const IPropertySet* s=reinterpret_cast<const IPropertySet*>(m_propsKey->getData());
490 return s ? s->getElement() : NULL;