/*
- * The Shibboleth License, Version 1.
- * Copyright (c) 2002
- * University Corporation for Advanced Internet Development, Inc.
- * All rights reserved
+ * Copyright 2001-2009 Internet2
*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution, if any, must include
- * the following acknowledgment: "This product includes software developed by
- * the University Corporation for Advanced Internet Development
- * <http://www.ucaid.edu>Internet2 Project. Alternately, this acknowledegement
- * may appear in the software itself, if and wherever such third-party
- * acknowledgments normally appear.
- *
- * Neither the name of Shibboleth nor the names of its contributors, nor
- * Internet2, nor the University Corporation for Advanced Internet Development,
- * Inc., nor UCAID may be used to endorse or promote products derived from this
- * software without specific prior written permission. For written permission,
- * please contact shibboleth@shibboleth.org
- *
- * Products derived from this software may not be called Shibboleth, Internet2,
- * UCAID, or the University Corporation for Advanced Internet Development, nor
- * may Shibboleth appear in their name, without prior written permission of the
- * University Corporation for Advanced Internet Development.
- *
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND WITH ALL FAULTS. ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, AND NON-INFRINGEMENT ARE DISCLAIMED AND THE ENTIRE RISK
- * OF SATISFACTORY QUALITY, PERFORMANCE, ACCURACY, AND EFFORT IS WITH LICENSEE.
- * IN NO EVENT SHALL THE COPYRIGHT OWNER, CONTRIBUTORS OR THE UNIVERSITY
- * CORPORATION FOR ADVANCED INTERNET DEVELOPMENT, INC. BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*/
/* isapi_shib.cpp - Shibboleth ISAPI filter
8/23/02
*/
+#include "config_win32.h"
+
// SAML Runtime
#include <saml/saml.h>
#include <shib/shib.h>
#include <shib/shib-threads.h>
#include <shib-target/shib-target.h>
-#include <log4cpp/Category.hh>
-
#include <ctime>
#include <fstream>
#include <sstream>
#include <stdexcept>
+#include <process.h>
#include <httpfilt.h>
#include <httpext.h>
-#include <cgiparse.h>
-
using namespace std;
-using namespace log4cpp;
using namespace saml;
using namespace shibboleth;
using namespace shibtarget;
-struct settings_t
-{
- settings_t() {}
- settings_t(string& name) : m_name(name) {}
-
- string m_name;
- vector<string> m_mustContain;
-};
-
// globals
namespace {
+ static const XMLCh name[] = { chLatin_n, chLatin_a, chLatin_m, chLatin_e, chNull };
+ static const XMLCh port[] = { chLatin_p, chLatin_o, chLatin_r, chLatin_t, chNull };
+ static const XMLCh sslport[] = { chLatin_s, chLatin_s, chLatin_l, chLatin_p, chLatin_o, chLatin_r, chLatin_t, chNull };
+ static const XMLCh scheme[] = { chLatin_s, chLatin_c, chLatin_h, chLatin_e, chLatin_m, chLatin_e, chNull };
+ static const XMLCh id[] = { chLatin_i, chLatin_d, chNull };
+ static const XMLCh Implementation[] =
+ { chLatin_I, chLatin_m, chLatin_p, chLatin_l, chLatin_e, chLatin_m, chLatin_e, chLatin_n, chLatin_t, chLatin_a, chLatin_t, chLatin_i, chLatin_o, chLatin_n, chNull };
+ static const XMLCh ISAPI[] = { chLatin_I, chLatin_S, chLatin_A, chLatin_P, chLatin_I, chNull };
+ static const XMLCh Alias[] = { chLatin_A, chLatin_l, chLatin_i, chLatin_a, chLatin_s, chNull };
+ static const XMLCh normalizeRequest[] =
+ { chLatin_n, chLatin_o, chLatin_r, chLatin_m, chLatin_a, chLatin_l, chLatin_i, chLatin_z, chLatin_e,
+ chLatin_R, chLatin_e, chLatin_q, chLatin_u, chLatin_e, chLatin_s, chLatin_t, chNull
+ };
+ static const XMLCh safeHeaderNames[] =
+ { chLatin_s, chLatin_a, chLatin_f, chLatin_e, chLatin_H, chLatin_e, chLatin_a, chLatin_d, chLatin_e, chLatin_r,
+ chLatin_N, chLatin_a, chLatin_m, chLatin_e, chLatin_s, chNull
+ };
+ static const XMLCh Site[] = { chLatin_S, chLatin_i, chLatin_t, chLatin_e, chNull };
+
+ struct site_t {
+ site_t(const DOMElement* e)
+ {
+ auto_ptr_char n(e->getAttributeNS(NULL,name));
+ auto_ptr_char s(e->getAttributeNS(NULL,scheme));
+ auto_ptr_char p(e->getAttributeNS(NULL,port));
+ auto_ptr_char p2(e->getAttributeNS(NULL,sslport));
+ if (n.get()) m_name=n.get();
+ if (s.get()) m_scheme=s.get();
+ if (p.get()) m_port=p.get();
+ if (p2.get()) m_sslport=p2.get();
+ DOMNodeList* nlist=e->getElementsByTagNameNS(shibtarget::XML::SHIBTARGET_NS,Alias);
+ for (int i=0; nlist && i<nlist->getLength(); i++) {
+ if (nlist->item(i)->hasChildNodes()) {
+ auto_ptr_char alias(nlist->item(i)->getFirstChild()->getNodeValue());
+ m_aliases.insert(alias.get());
+ }
+ }
+ }
+ string m_scheme,m_port,m_sslport,m_name;
+ set<string> m_aliases;
+ };
+
HINSTANCE g_hinstDLL;
- ThreadKey* rpc_handle_key = NULL;
ShibTargetConfig* g_Config = NULL;
- vector<settings_t> g_Sites;
-}
-
-void destroy_handle(void* data)
-{
- delete (RPCHandle*)data;
+ map<string,site_t> g_Sites;
+ bool g_bNormalizeRequest = true;
+ string g_unsetHeaderValue,g_spoofKey;
+ set<string> g_allowedSchemes;
+ bool g_checkSpoofing = true;
+ bool g_catchAll = true;
+ bool g_bSafeHeaderNames = false;
}
BOOL LogEvent(
LPCSTR message)
{
LPCSTR messages[] = {message, NULL};
-
+
HANDLE hElog = RegisterEventSource(lpUNCServerName, "Shibboleth ISAPI Filter");
BOOL res = ReportEvent(hElog, wType, 0, dwEventID, lpUserSid, 1, 0, messages, NULL);
return (DeregisterEventSource(hElog) && res);
{
if (!pVer)
return FALSE;
-
+
if (!g_Config)
{
LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL,
return TRUE;
}
+extern "C" BOOL WINAPI TerminateExtension(DWORD)
+{
+ return TRUE; // cleanup should happen when filter unloads
+}
+
extern "C" BOOL WINAPI GetFilterVersion(PHTTP_FILTER_VERSION pVer)
{
if (!pVer)
return FALSE;
+ else if (g_Config) {
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL,
+ "Reentrant filter initialization, ignoring...");
+ return TRUE;
+ }
- try
- {
- ShibTargetConfig::preinit();
- g_Config = &(ShibTargetConfig::init(SHIBTARGET_SHIRE, getenv("SHIBCONFIG")));
- ShibINI& ini = g_Config->getINI();
-
- // Create the RPC Handle TLS key.
- rpc_handle_key=ThreadKey::create(destroy_handle);
+ try {
+ LPCSTR schemadir=getenv("SHIBSCHEMAS");
+ if (!schemadir)
+ schemadir=SHIB_SCHEMAS;
+ LPCSTR config=getenv("SHIBCONFIG");
+ if (!config)
+ config=SHIB_CONFIG;
+ g_Config=&ShibTargetConfig::getConfig();
+ g_Config->setFeatures(
+ ShibTargetConfig::Listener |
+ ShibTargetConfig::Metadata |
+ ShibTargetConfig::AAP |
+ ShibTargetConfig::RequestMapper |
+ ShibTargetConfig::LocalExtensions |
+ ShibTargetConfig::Logging
+ );
+ if (!g_Config->init(schemadir)) {
+ g_Config=NULL;
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL,
+ "Filter startup failed during library initialization, check native log for help.");
+ return FALSE;
+ }
+ else if (!g_Config->load(config)) {
+ g_Config=NULL;
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL,
+ "Filter startup failed to load configuration, check native log for help.");
+ return FALSE;
+ }
- Category& log=Category::getInstance("isapi_shib.GetFilterVersion");
+ // Access the implementation-specifics for site mappings.
+ IConfig* conf=g_Config->getINI();
+ Locker locker(conf);
+ const IPropertySet* props=conf->getPropertySet("Local");
+ if (props) {
+ pair<bool,bool> flag=props->getBool("checkSpoofing");
+ g_checkSpoofing = !flag.first || flag.second;
+ flag=props->getBool("catchAll");
+ g_catchAll = !flag.first || flag.second;
+
+ pair<bool,const char*> str=props->getString("unsetHeaderValue");
+ if (str.first)
+ g_unsetHeaderValue = str.second;
+
+ str=props->getString("allowedSchemes");
+ if (str.first) {
+ string schemes=str.second;
+ unsigned int j=0;
+ for (unsigned int i=0; i < schemes.length(); i++) {
+ if (schemes.at(i)==' ') {
+ g_allowedSchemes.insert(schemes.substr(j, i-j));
+ j = i+1;
+ }
+ }
+ g_allowedSchemes.insert(schemes.substr(j, schemes.length()-j));
+ }
- // Read site-specific settings for each instance ID we can find.
- unsigned short i=1;
- char iid[8];
- sprintf(iid,"%u",i++);
- string hostname;
- while (ini.get_tag("isapi",iid,false,&hostname))
- {
- log.info("configuring for site ID (%d), hostname (%s)",i-1,hostname.empty() ? "null" : hostname.c_str());
-
- // If no section exists for the host, mark it as a "skip" site.
- if (!ini.exists(hostname))
- {
- log.info("skipping site ID (%d)",i-1);
- g_Sites.push_back(settings_t());
- sprintf(iid,"%u",i++);
- continue;
+ if (g_checkSpoofing) {
+ str = props->getString("spoofKey");
+ if (str.first)
+ g_spoofKey = str.second;
+ else {
+ LogEvent(NULL, EVENTLOG_WARNING_TYPE, 2100, NULL,
+ "Filter generating a pseudorandom anti-spoofing key, consider setting spoofKey yourself.");
+ srand(time(NULL));
+ ostringstream keystr;
+ keystr << rand() << rand() << rand() << rand();
+ g_spoofKey = keystr.str();
+ }
}
-
- settings_t settings(hostname);
-
- // Content matching string.
- string mustcontain;
- if (ini.get_tag(hostname,"mustContain",true,&mustcontain) && !mustcontain.empty())
- {
- char* buf=strdup(mustcontain.c_str());
- _strupr(buf);
- char* start=buf;
- while (char* sep=strchr(start,';'))
- {
- *sep='\0';
- if (*start)
- settings.m_mustContain.push_back(start);
- start=sep+1;
+
+ const DOMElement* impl=saml::XML::getFirstChildElement(
+ props->getElement(),shibtarget::XML::SHIBTARGET_NS,Implementation
+ );
+ if (impl && (impl=saml::XML::getFirstChildElement(impl,shibtarget::XML::SHIBTARGET_NS,ISAPI))) {
+ const XMLCh* ch=impl->getAttributeNS(NULL,normalizeRequest);
+ g_bNormalizeRequest=(!ch || !*ch || *ch==chDigit_1 || *ch==chLatin_t);
+ ch=impl->getAttributeNS(NULL,safeHeaderNames);
+ g_bSafeHeaderNames=(ch && (*ch==chDigit_1 || *ch==chLatin_t));
+ impl=saml::XML::getFirstChildElement(impl,shibtarget::XML::SHIBTARGET_NS,Site);
+ while (impl) {
+ auto_ptr_char id(impl->getAttributeNS(NULL,id));
+ if (id.get())
+ g_Sites.insert(pair<string,site_t>(id.get(),site_t(impl)));
+ impl=saml::XML::getNextSiblingElement(impl,shibtarget::XML::SHIBTARGET_NS,Site);
}
- if (*start)
- settings.m_mustContain.push_back(start);
- free(buf);
}
-
- g_Sites.push_back(settings);
- sprintf(iid,"%u",i++);
- hostname.erase();
+ }
+ if (g_allowedSchemes.empty()) {
+ g_allowedSchemes.insert("https");
+ g_allowedSchemes.insert("http");
}
}
- catch (SAMLException&)
- {
- LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL,
- "Filter startup failed with SAML exception, check shire log for help.");
- return FALSE;
- }
- catch (runtime_error& e)
- {
- LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, e.what());
- return FALSE;
- }
- catch (...)
- {
- LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, "Filter startup failed with unexpected exception.");
+ catch (exception&) {
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, "Filter startup failed with an exception.");
return FALSE;
}
return TRUE;
}
-extern "C" BOOL WINAPI TerminateExtension(DWORD)
-{
- return TRUE; // cleanup should happen when filter unloads
-}
-
extern "C" BOOL WINAPI TerminateFilter(DWORD)
{
- delete rpc_handle_key;
if (g_Config)
g_Config->shutdown();
g_Config = NULL;
void GetServerVariable(PHTTP_FILTER_CONTEXT pfc, LPSTR lpszVariable, dynabuf& s, DWORD size=80, bool bRequired=true)
throw (bad_alloc, DWORD)
{
- s.erase();
s.reserve(size);
+ s.erase();
size=s.size();
while (!pfc->GetServerVariable(pfc,lpszVariable,s,&size))
void GetServerVariable(LPEXTENSION_CONTROL_BLOCK lpECB, LPSTR lpszVariable, dynabuf& s, DWORD size=80, bool bRequired=true)
throw (bad_alloc, DWORD)
{
- s.erase();
s.reserve(size);
+ s.erase();
size=s.size();
- while (lpECB->GetServerVariable(lpECB->ConnID,lpszVariable,s,&size))
+ while (!lpECB->GetServerVariable(lpECB->ConnID,lpszVariable,s,&size))
{
// Grumble. Check the error.
DWORD e=GetLastError();
LPSTR lpszName, dynabuf& s, DWORD size=80, bool bRequired=true)
throw (bad_alloc, DWORD)
{
- s.erase();
s.reserve(size);
+ s.erase();
size=s.size();
while (!pn->GetHeader(pfc,lpszName,s,&size))
throw ERROR_NO_DATA;
}
-inline char hexchar(unsigned short s)
-{
- return (s<=9) ? ('0' + s) : ('A' + s - 10);
-}
+/****************************************************************************/
+// ISAPI Filter
-string url_encode(const char* url) throw (bad_alloc)
+class ShibTargetIsapiF : public ShibTarget
{
- static char badchars[]="\"\\+<>#%{}|^~[]`;/?:@=&";
- string s;
- for (const char* pch=url; *pch; pch++)
- {
- if (strchr(badchars,*pch)!=NULL || *pch<=0x1F || *pch>=0x7F)
- s=s + '%' + hexchar(*pch >> 4) + hexchar(*pch & 0x0F);
- else
- s+=*pch;
+ PHTTP_FILTER_CONTEXT m_pfc;
+ PHTTP_FILTER_PREPROC_HEADERS m_pn;
+ string m_cookie;
+ dynabuf m_allhttp;
+ bool m_firsttime;
+
+ void checkString(const string& s, const char* msg) {
+ string::const_iterator e = s.end();
+ for (string::const_iterator i=s.begin(); i!=e; ++i) {
+ if (iscntrl(*i))
+ throw FatalProfileException(msg);
}
- return s;
-}
-
-string get_target(PHTTP_FILTER_CONTEXT pfc, PHTTP_FILTER_PREPROC_HEADERS pn, settings_t& site)
-{
- // Reconstructing the requested URL is not fun. Apparently, the PREPROC_HEADERS
- // event means way pre. As in, none of the usual CGI headers are in place yet.
- // It's actually almost easier, in a way, because all the path-info and query
- // stuff is in one place, the requested URL, which we can get. But we have to
- // reconstruct the protocol/host pair using tweezers.
- string s;
- if (pfc->fIsSecurePort)
- s="https://";
- else
- s="http://";
+ }
- // We use the "normalizeRequest" tag to decide how to obtain the server's name.
- dynabuf buf(256);
- string tag;
- if (g_Config->getINI().get_tag(site.m_name,"normalizeRequest",true,&tag) && ShibINI::boolean(tag))
- {
- s+=site.m_name;
+public:
+ ShibTargetIsapiF(PHTTP_FILTER_CONTEXT pfc, PHTTP_FILTER_PREPROC_HEADERS pn, const site_t& site)
+ : m_pfc(pfc), m_pn(pn), m_allhttp(4096), m_firsttime(true) {
+
+ // URL path always come from IIS.
+ dynabuf url(256);
+ GetHeader(pn,pfc,"url",url,256,false);
+
+ // Port may come from IIS or from site def.
+ dynabuf port(11);
+ if (!g_bNormalizeRequest || (pfc->fIsSecurePort && site.m_sslport.empty()) || (!pfc->fIsSecurePort && site.m_port.empty()))
+ GetServerVariable(pfc,"SERVER_PORT",port,10);
+ else if (pfc->fIsSecurePort) {
+ strncpy(port,site.m_sslport.c_str(),10);
+ static_cast<char*>(port)[10]=0;
}
- else
- {
- GetServerVariable(pfc,"SERVER_NAME",buf);
- s+=buf;
+ else {
+ strncpy(port,site.m_port.c_str(),10);
+ static_cast<char*>(port)[10]=0;
}
- GetServerVariable(pfc,"SERVER_PORT",buf,10);
- if (buf!=(pfc->fIsSecurePort ? "443" : "80"))
- s=s + ':' + static_cast<char*>(buf);
-
- GetHeader(pn,pfc,"url",buf,256,false);
- s+=buf;
+ // Scheme may come from site def or be derived from IIS.
+ const char* scheme=site.m_scheme.c_str();
+ if (!scheme || !*scheme || !g_bNormalizeRequest)
+ scheme=pfc->fIsSecurePort ? "https" : "http";
+
+ // Get the rest of the server variables.
+ dynabuf remote_addr(16),method(5),content_type(32),hostname(32);
+ GetServerVariable(pfc,"SERVER_NAME",hostname,32);
+ GetServerVariable(pfc,"REMOTE_ADDR",remote_addr,16);
+ GetServerVariable(pfc,"REQUEST_METHOD",method,5,false);
+ GetServerVariable(pfc,"CONTENT_TYPE",content_type,32,false);
+
+ // Make sure SERVER_NAME is "authorized" for use on this site. If not, set to canonical name.
+ const char* host=hostname;
+ if (site.m_name!=host && site.m_aliases.find(host)==site.m_aliases.end())
+ host=site.m_name.c_str();
+
+ init(scheme, host, atoi(port), url, content_type, remote_addr, method);
+
+ if (!g_spoofKey.empty()) {
+ GetHeader(pn, pfc, "ShibSpoofCheck:", url, 32, false);
+ if (!url.empty() && g_spoofKey == (char*)url)
+ m_firsttime = false;
+ }
- return s;
-}
+ if (!m_firsttime)
+ log(LogLevelDebug, "ISAPI filter running more than once");
+ }
+ ~ShibTargetIsapiF() {}
+
+ virtual void log(ShibLogLevel level, const string &msg) {
+ ShibTarget::log(level,msg);
+ }
+ virtual string getCookies() const {
+ dynabuf buf(128);
+ GetHeader(m_pn, m_pfc, "Cookie:", buf, 128, false);
+ return buf.empty() ? "" : buf;
+ }
+ string makeSafeHeader(const char* rawname) const {
+ string hdr;
+ for (; *rawname; ++rawname) {
+ if (isalnum(*rawname))
+ hdr += *rawname;
+ }
+ return hdr + ':';
+ }
+ virtual void clearHeader(const string &name) {
+ if (g_checkSpoofing && m_firsttime) {
+ if (m_allhttp.empty())
+ GetServerVariable(m_pfc,"ALL_HTTP",m_allhttp,4096);
+
+ // Map to the expected CGI variable name.
+ string transformed("HTTP_");
+ if (g_bSafeHeaderNames) {
+ string temp = makeSafeHeader(name.c_str());
+ for (const char* pch = temp.c_str(); *pch; ++pch) {
+ if (isalnum(*pch))
+ transformed += toupper(*pch);
+ }
+ }
+ else {
+ for (const char* pch = name.c_str(); *pch; ++pch)
+ transformed += (isalnum(*pch) ? toupper(*pch) : '_');
+ transformed += ':';
+ }
-string get_shire_location(settings_t& site, const char* target)
-{
- string shireURL;
- if (g_Config->getINI().get_tag(site.m_name,"shireURL",true,&shireURL) && !shireURL.empty())
- {
- if (shireURL[0]!='/')
- return shireURL;
- const char* colon=strchr(target,':');
- const char* slash=strchr(colon+3,'/');
- string s(target,slash-target);
- s+=shireURL;
- return s;
- }
- return shireURL;
-}
+ if (strstr(m_allhttp, transformed.c_str()))
+ throw SAMLException("Attempt to spoof header ($1) was detected.", params(1, transformed.c_str()));
+ }
+ if (g_bSafeHeaderNames) {
+ string hdr = makeSafeHeader(name.c_str());
+ m_pn->SetHeader(m_pfc, const_cast<char*>(hdr.c_str()), const_cast<char*>(g_unsetHeaderValue.c_str()));
+ }
+ else if (name == "REMOTE_USER") {
+ m_pn->SetHeader(m_pfc, "remote-user:", const_cast<char*>(g_unsetHeaderValue.c_str()));
+ m_pn->SetHeader(m_pfc, "remote_user:", const_cast<char*>(g_unsetHeaderValue.c_str()));
+ }
+ else {
+ string hdr = name + ':';
+ m_pn->SetHeader(m_pfc, const_cast<char*>(hdr.c_str()), const_cast<char*>(g_unsetHeaderValue.c_str()));
+ }
+ }
+ virtual void setHeader(const string &name, const string &value) {
+ string hdr = g_bSafeHeaderNames ? makeSafeHeader(name.c_str()) : (name + ':');
+ m_pn->SetHeader(m_pfc, const_cast<char*>(hdr.c_str()), const_cast<char*>(value.c_str()));
+ }
+ virtual string getHeader(const string &name) {
+ string hdr = g_bSafeHeaderNames ? makeSafeHeader(name.c_str()) : (name + ':');
+ dynabuf buf(256);
+ GetHeader(m_pn, m_pfc, const_cast<char*>(hdr.c_str()), buf, 1024, false);
+ return string(buf.empty() ? "" : buf);
+ }
+ virtual void setRemoteUser(const string &user) {
+ setHeader(string("remote-user"), user);
+ if (m_pfc->pFilterContext) {
+ if (user.empty())
+ m_pfc->pFilterContext = NULL;
+ else if (m_pfc->pFilterContext = m_pfc->AllocMem(m_pfc, sizeof(char) * (user.length() + 1), NULL))
+ strcpy(reinterpret_cast<char*>(m_pfc->pFilterContext), user.c_str());
+ }
+ }
+ virtual string getRemoteUser(void) {
+ return getHeader(string("remote-user"));
+ }
+ virtual void* sendPage(
+ const string& msg,
+ int code=200,
+ const string& content_type="text/html",
+ const Iterator<header_t>& headers=EMPTY(header_t)) {
+ checkString(content_type, "Detected control character in a response header.");
+ string hdr = string ("Connection: close\r\nContent-type: ") + content_type + "\r\n";
+ while (headers.hasNext()) {
+ const header_t& h=headers.next();
+ checkString(h.first, "Detected control character in a response header.");
+ checkString(h.second, "Detected control character in a response header.");
+ hdr += h.first + ": " + h.second + "\r\n";
+ }
+ hdr += "\r\n";
+ const char* codestr="200 OK";
+ switch (code) {
+ case 403: codestr="403 Forbidden"; break;
+ case 404: codestr="404 Not Found"; break;
+ case 500: codestr="500 Server Error"; break;
+ }
+ m_pfc->ServerSupportFunction(m_pfc, SF_REQ_SEND_RESPONSE_HEADER, (void*)codestr, (DWORD)hdr.c_str(), 0);
+ DWORD resplen = msg.size();
+ m_pfc->WriteClient(m_pfc, (LPVOID)msg.c_str(), &resplen, 0);
+ return (void*)SF_STATUS_REQ_FINISHED;
+ }
+ virtual void* sendRedirect(const string& url) {
+ checkString(url, "Detected control character in an attempted redirect.");
+ if (g_allowedSchemes.find(url.substr(0, url.find(':'))) == g_allowedSchemes.end())
+ throw FatalProfileException("Invalid scheme in attempted redirect.");
+ // XXX: Don't support the httpRedirect option, yet.
+ string hdrs=m_cookie + string("Location: ") + url + "\r\n"
+ "Content-Type: text/html\r\n"
+ "Content-Length: 40\r\n"
+ "Expires: 01-Jan-1997 12:00:00 GMT\r\n"
+ "Cache-Control: private,no-store,no-cache\r\n\r\n";
+ m_pfc->ServerSupportFunction(m_pfc, SF_REQ_SEND_RESPONSE_HEADER,
+ "302 Please Wait", (DWORD)hdrs.c_str(), 0);
+ static const char* redmsg="<HTML><BODY>Redirecting...</BODY></HTML>";
+ DWORD resplen=40;
+ m_pfc->WriteClient(m_pfc, (LPVOID)redmsg, &resplen, 0);
+ return reinterpret_cast<void*>(SF_STATUS_REQ_FINISHED);
+ }
+ // XXX: We might not ever hit the 'decline' status in this filter.
+ //virtual void* returnDecline(void) { }
+ virtual void* returnOK(void) { return (void*) SF_STATUS_REQ_NEXT_NOTIFICATION; }
+
+ // The filter never processes the POST, so stub these methods.
+ virtual void setCookie(const string &name, const string &value) {
+ // Set the cookie for later. Use it during the redirect.
+ m_cookie += "Set-Cookie: " + name + "=" + value + "\r\n";
+ }
+ virtual string getArgs(void) { throw runtime_error("getArgs not implemented"); }
+ virtual string getPostData(void) { throw runtime_error("getPostData not implemented"); }
+};
DWORD WriteClientError(PHTTP_FILTER_CONTEXT pfc, const char* msg)
{
LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, msg);
- static const char* ctype="Content-Type: text/html\r\n";
- pfc->AddResponseHeaders(pfc,const_cast<char*>(ctype),0);
- pfc->ServerSupportFunction(pfc,SF_REQ_SEND_RESPONSE_HEADER,"200 OK",0,0);
+ static const char* ctype="Connection: close\r\nContent-Type: text/html\r\n\r\n";
+ pfc->ServerSupportFunction(pfc,SF_REQ_SEND_RESPONSE_HEADER,"200 OK",(DWORD)ctype,0);
static const char* xmsg="<HTML><HEAD><TITLE>Shibboleth Filter Error</TITLE></HEAD><BODY>"
"<H1>Shibboleth Filter Error</H1>";
DWORD resplen=strlen(xmsg);
return SF_STATUS_REQ_FINISHED;
}
-DWORD WriteClientError(PHTTP_FILTER_CONTEXT pfc, const char* filename, ShibMLP& mlp)
-{
- ifstream infile(filename);
- if (!infile)
- return WriteClientError(pfc,"Unable to open error template, check settings.");
- string res = mlp.run(infile);
-
- static const char* ctype="Content-Type: text/html\r\n";
- pfc->AddResponseHeaders(pfc,const_cast<char*>(ctype),0);
- pfc->ServerSupportFunction(pfc,SF_REQ_SEND_RESPONSE_HEADER,"200 OK",0,0);
- DWORD resplen=res.length();
- pfc->WriteClient(pfc,(LPVOID)res.c_str(),&resplen,0);
- return SF_STATUS_REQ_FINISHED;
-}
-
extern "C" DWORD WINAPI HttpFilterProc(PHTTP_FILTER_CONTEXT pfc, DWORD notificationType, LPVOID pvNotification)
{
// Is this a log notification?
- if (notificationType==SF_NOTIFY_LOG)
- {
+ if (notificationType==SF_NOTIFY_LOG) {
if (pfc->pFilterContext)
- ((PHTTP_FILTER_LOG)pvNotification)->pszClientUserName=static_cast<LPCSTR>(pfc->pFilterContext);
+ ((PHTTP_FILTER_LOG)pvNotification)->pszClientUserName=reinterpret_cast<char*>(pfc->pFilterContext);
return SF_STATUS_REQ_NEXT_NOTIFICATION;
}
PHTTP_FILTER_PREPROC_HEADERS pn=(PHTTP_FILTER_PREPROC_HEADERS)pvNotification;
- try
- {
+ try {
// Determine web site number. This can't really fail, I don't think.
dynabuf buf(128);
- ULONG site_id=0;
GetServerVariable(pfc,"INSTANCE_ID",buf,10);
- if ((site_id=strtoul(buf,NULL,10))==0)
- return WriteClientError(pfc,"IIS site instance appears to be invalid.");
- // Match site instance to site settings.
- if (site_id>g_Sites.size() || g_Sites[site_id-1].m_name.length()==0)
+ // Match site instance to host name, skip if no match.
+ map<string,site_t>::const_iterator map_i=g_Sites.find(static_cast<char*>(buf));
+ if (map_i==g_Sites.end())
return SF_STATUS_REQ_NEXT_NOTIFICATION;
- settings_t& site=g_Sites[site_id-1];
-
- string target_url=get_target(pfc,pn,site);
- string shire_url=get_shire_location(site,target_url.c_str());
-
- // If the user is accessing the SHIRE acceptance point, pass it on.
- if (target_url.find(shire_url)!=string::npos)
- return SF_STATUS_REQ_NEXT_NOTIFICATION;
-
- // Get the url request and scan for the must-contain string.
- if (!site.m_mustContain.empty())
- {
- char* upcased=new char[target_url.length()+1];
- strcpy(upcased,target_url.c_str());
- _strupr(upcased);
- for (vector<string>::const_iterator index=site.m_mustContain.begin(); index!=site.m_mustContain.end(); index++)
- if (strstr(upcased,index->c_str()))
- break;
- delete[] upcased;
- if (index==site.m_mustContain.end())
- return SF_STATUS_REQ_NEXT_NOTIFICATION;
- }
-
- // SSL content check.
- ShibINI& ini=g_Config->getINI();
- string tag;
- if (ini.get_tag(site.m_name,"contentSSLOnly",true,&tag) && ShibINI::boolean(tag) && !pfc->fIsSecurePort)
- {
- return WriteClientError(pfc,
- "This server is configured to deny non-SSL requests for secure resources. "
- "Try your request again using https instead of http.");
- }
ostringstream threadid;
- threadid << "[" << getpid() << "] shire" << '\0';
+ threadid << "[" << getpid() << "] isapi_shib" << '\0';
saml::NDC ndc(threadid.str().c_str());
- // Set SHIRE policies.
- SHIREConfig config;
- config.checkIPAddress = (ini.get_tag(site.m_name,"checkIPAddress",true,&tag) && ShibINI::boolean(tag));
- config.lifetime=config.timeout=0;
- tag.erase();
- if (ini.get_tag(site.m_name, "authLifetime", true, &tag))
- config.lifetime=strtoul(tag.c_str(),NULL,10);
- tag.erase();
- if (ini.get_tag(site.m_name, "authTimeout", true, &tag))
- config.timeout=strtoul(tag.c_str(),NULL,10);
-
- // Pull the config data we need to handle the various possible conditions.
- string shib_cookie;
- if (!ini.get_tag(site.m_name, "cookieName", true, &shib_cookie))
- return WriteClientError(pfc,"The cookieName configuration setting is missing, check configuration.");
-
- string wayfLocation;
- if (!ini.get_tag(site.m_name, "wayfURL", true, &wayfLocation))
- return WriteClientError(pfc,"The wayfURL configuration setting is missing, check configuration.");
-
- string shireError;
- if (!ini.get_tag(site.m_name, "shireError", true, &shireError))
- return WriteClientError(pfc,"The shireError configuration setting is missing, check configuration.");
-
- string accessError;
- if (!ini.get_tag(site.m_name, "accessError", true, &shireError))
- return WriteClientError(pfc,"The accessError configuration setting is missing, check configuration.");
-
- // Get an RPC handle and build the SHIRE object.
- RPCHandle* rpc_handle = (RPCHandle*)rpc_handle_key->getData();
- if (!rpc_handle)
- {
- rpc_handle = new RPCHandle(shib_target_sockname(), SHIBRPC_PROG, SHIBRPC_VERS_1);
- rpc_handle_key->setData(rpc_handle);
- }
- SHIRE shire(rpc_handle, config, shire_url);
+ ShibTargetIsapiF stf(pfc, pn, map_i->second);
- // Check for authentication cookie.
- const char* session_id=NULL;
- GetHeader(pn,pfc,"Cookie:",buf,128,false);
- Category::getInstance("isapi_shib.HttpFilterProc").debug("cookie header is {%s}",(const char*)buf);
- if (buf.empty() || !(session_id=strstr(buf,shib_cookie.c_str())) || *(session_id+shib_cookie.length())!='=')
- {
- // Redirect to WAYF.
- string wayf("Location: ");
- wayf+=wayfLocation + "?shire=" + url_encode(shire_url.c_str()) + "&target=" + url_encode(target_url.c_str()) + "\r\n";
- // Insert the headers.
- pfc->AddResponseHeaders(pfc,const_cast<char*>(wayf.c_str()),0);
- pfc->ServerSupportFunction(pfc,SF_REQ_SEND_RESPONSE_HEADER,"302 Please Wait",0,0);
- return SF_STATUS_REQ_FINISHED;
- }
+ // "false" because we don't override the Shib settings
+ pair<bool,void*> res = stf.doCheckAuthN();
+ if (!g_spoofKey.empty())
+ pn->SetHeader(pfc, "ShibSpoofCheck:", const_cast<char*>(g_spoofKey.c_str()));
+ if (res.first) return (DWORD)res.second;
- session_id+=shib_cookie.length() + 1; /* Skip over the '=' */
- char* cookieend=strchr(session_id,';');
- if (cookieend)
- *cookieend = '\0'; /* Ignore anyting after a ; */
-
- // Make sure this session is still valid.
- RPCError* status = NULL;
- ShibMLP markupProcessor;
- bool has_tag = ini.get_tag(site.m_name, "supportContact", true, &tag);
- markupProcessor.insert("supportContact", has_tag ? tag : "");
- has_tag = ini.get_tag(site.m_name, "logoLocation", true, &tag);
- markupProcessor.insert("logoLocation", has_tag ? tag : "");
- markupProcessor.insert("requestURL", target_url);
-
- GetServerVariable(pfc,"REMOTE_ADDR",buf,16);
- try {
- status = shire.sessionIsValid(session_id, buf, target_url.c_str());
- }
- catch (ShibTargetException &e) {
- markupProcessor.insert("errorType", "SHIRE Processing Error");
- markupProcessor.insert("errorText", e.what());
- markupProcessor.insert("errorDesc", "An error occurred while processing your request.");
- return WriteClientError(pfc, shireError.c_str(), markupProcessor);
- }
- catch (...) {
- markupProcessor.insert("errorType", "SHIRE Processing Error");
- markupProcessor.insert("errorText", "Unexpected Exception");
- markupProcessor.insert("errorDesc", "An error occurred while processing your request.");
- return WriteClientError(pfc, shireError.c_str(), markupProcessor);
- }
-
- // Check the status
- if (status->isError()) {
- if (status->isRetryable()) {
- // Redirect to WAYF.
- delete status;
- string wayf("Location: ");
- wayf+=wayfLocation + "?shire=" + url_encode(shire_url.c_str()) + "&target=" + url_encode(target_url.c_str()) + "\r\n";
- // Insert the headers.
- pfc->AddResponseHeaders(pfc,const_cast<char*>(wayf.c_str()),0);
- pfc->ServerSupportFunction(pfc,SF_REQ_SEND_RESPONSE_HEADER,"302 Please Wait",0,0);
- return SF_STATUS_REQ_FINISHED;
- }
- else {
- // return the error page to the user
- markupProcessor.insert(*status);
- delete status;
- return WriteClientError(pfc, shireError.c_str(), markupProcessor);
- }
- }
- delete status;
-
- // Move to RM phase.
- RMConfig rm_config;
- rm_config.checkIPAddress = config.checkIPAddress;
- RM rm(rpc_handle,rm_config);
-
- // Get the attributes.
- vector<SAMLAssertion*> assertions;
- SAMLAuthenticationStatement* sso_statement=NULL;
- status = rm.getAssertions(session_id, buf, target_url.c_str(), assertions, &sso_statement);
-
- if (status->isError()) {
- string rmError;
- if (!ini.get_tag(site.m_name, "rmError", true, &shireError))
- return WriteClientError(pfc,"The rmError configuration setting is missing, check configuration.");
-
- markupProcessor.insert(*status);
- delete status;
- return WriteClientError(pfc, rmError.c_str(), markupProcessor);
- }
- delete status;
-
- // Only allow a single assertion...
- if (assertions.size() > 1) {
- for (int k = 0; k < assertions.size(); k++)
- delete assertions[k];
- delete sso_statement;
- return WriteClientError(pfc, accessError.c_str(), markupProcessor);
- }
-
- // Get the AAP providers, which contain the attribute policy info.
- Iterator<IAAP*> provs=ShibConfig::getConfig().getAAPProviders();
-
- // Clear out the list of mapped attributes
- while (provs.hasNext())
- {
- IAAP* aap=provs.next();
- aap->lock();
- try
- {
- Iterator<const IAttributeRule*> rules=aap->getAttributeRules();
- while (rules.hasNext())
- {
- const char* header=rules.next()->getHeader();
- if (header)
- pn->SetHeader(pfc,const_cast<char*>(header),"");
- }
- }
- catch(...)
- {
- aap->unlock();
- for (int k = 0; k < assertions.size(); k++)
- delete assertions[k];
- delete sso_statement;
- throw;
- }
- aap->unlock();
- }
- provs.reset();
+ // "false" because we don't override the Shib settings
+ res = stf.doExportAssertions();
+ if (res.first) return (DWORD)res.second;
- // Clear relevant headers.
- pn->SetHeader(pfc,"remote-user:","");
- pn->SetHeader(pfc,"Shib-Attributes:","");
- pn->SetHeader(pfc,"Shib-Origin-Site:","");
- pn->SetHeader(pfc,"Shib-Authentication-Method:","");
-
- // Maybe export the assertion.
- if (ini.get_tag(site.m_name,"exportAssertion",true,&tag) && ShibINI::boolean(tag))
- {
- string assertion;
- RM::serialize(*(assertions[0]), assertion);
- string::size_type lfeed;
- while ((lfeed=assertion.find('\n'))!=string::npos)
- assertion.erase(lfeed,1);
- pn->SetHeader(pfc,"Shib-Attributes:",const_cast<char*>(assertion.c_str()));
- }
-
- if (sso_statement)
- {
- auto_ptr<char> os(XMLString::transcode(sso_statement->getSubject()->getNameQualifier()));
- auto_ptr<char> am(XMLString::transcode(sso_statement->getAuthMethod()));
- pn->SetHeader(pfc,"Shib-Origin-Site:", os.get());
- pn->SetHeader(pfc,"Shib-Authentication-Method:", am.get());
- }
-
- // Export the attributes. Only supports a single statement.
- Iterator<SAMLAttribute*> j = assertions.size()==1 ? RM::getAttributes(*(assertions[0])) : EMPTY(SAMLAttribute*);
- while (j.hasNext())
- {
- SAMLAttribute* attr=j.next();
-
- // Are we supposed to export it?
- const char* hname=NULL;
- AAP wrapper(attr->getName(),attr->getNamespace());
- if (!wrapper.fail())
- hname=wrapper->getHeader();
- if (hname)
- {
- Iterator<string> vals=attr->getSingleByteValues();
- if (!strcmp(hname,"REMOTE_USER") && vals.hasNext())
- {
- char* principal=const_cast<char*>(vals.next().c_str());
- pn->SetHeader(pfc,"remote-user:",principal);
- pfc->pFilterContext=pfc->AllocMem(pfc,strlen(principal)+1,0);
- if (pfc->pFilterContext)
- strcpy(static_cast<char*>(pfc->pFilterContext),principal);
- }
- else
- {
- string header;
- for (int it = 0; vals.hasNext(); it++) {
- string value = vals.next();
- for (string::size_type pos = value.find_first_of(";", string::size_type(0)); pos != string::npos; pos = value.find_first_of(";", pos)) {
- value.insert(pos, "\\");
- pos += 2;
- }
- if (it == 0)
- header=value;
- else
- header=header + ';' + value;
- }
- string hname2=string(hname) + ':';
- pn->SetHeader(pfc,const_cast<char*>(hname2.c_str()),const_cast<char*>(header.c_str()));
- }
- }
- }
-
- // clean up memory
- for (int k = 0; k < assertions.size(); k++)
- delete assertions[k];
- delete sso_statement;
+ res = stf.doCheckAuthZ();
+ if (res.first) return (DWORD)res.second;
return SF_STATUS_REQ_NEXT_NOTIFICATION;
}
- catch(bad_alloc)
- {
+ catch(bad_alloc) {
return WriteClientError(pfc,"Out of Memory");
}
- catch(DWORD e)
- {
+ catch(long e) {
if (e==ERROR_NO_DATA)
return WriteClientError(pfc,"A required variable or header was empty.");
else
- return WriteClientError(pfc,"Server detected unexpected IIS error.");
+ return WriteClientError(pfc,"Shibboleth Filter detected unexpected IIS error.");
}
- catch(...)
- {
- return WriteClientError(pfc,"Server caught an unknown exception.");
+ catch (exception& e) {
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, e.what());
+ return WriteClientError(pfc,"Shibboleth Filter caught an exception, ask administrator to check Event Log for details.");
}
-
- return WriteClientError(pfc,"Server reached unreachable code!");
-}
-
-string get_target(LPEXTENSION_CONTROL_BLOCK lpECB, settings_t& site)
-{
- string s;
- dynabuf buf(256);
- GetServerVariable(lpECB,"HTTPS",buf);
- bool SSL=(buf=="on");
- if (SSL)
- s="https://";
- else
- s="http://";
-
- // We use the "normalizeRequest" tag to decide how to obtain the server's name.
- string tag;
- if (g_Config->getINI().get_tag(site.m_name,"normalizeRequest",true,&tag) && ShibINI::boolean(tag))
- {
- s+=site.m_name;
- }
- else
- {
- GetServerVariable(lpECB,"SERVER_NAME",buf);
- s+=buf;
+ catch(...) {
+ if (g_catchAll)
+ return WriteClientError(pfc,"Shibboleth Filter caught an unknown exception.");
+ throw;
}
- GetServerVariable(lpECB,"SERVER_PORT",buf,10);
- if (buf!=(SSL ? "443" : "80"))
- s=s + ':' + static_cast<char*>(buf);
+ return WriteClientError(pfc,"Shibboleth Filter reached unreachable code, save my walrus!");
+}
- GetServerVariable(lpECB,"URL",buf,255);
- s+=buf;
- return s;
-}
+/****************************************************************************/
+// ISAPI Extension
DWORD WriteClientError(LPEXTENSION_CONTROL_BLOCK lpECB, const char* msg)
{
LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, msg);
- static const char* ctype="Content-Type: text/html\r\n";
+ static const char* ctype="Connection: close\r\nContent-Type: text/html\r\n\r\n";
lpECB->ServerSupportFunction(lpECB->ConnID,HSE_REQ_SEND_RESPONSE_HEADER,"200 OK",0,(LPDWORD)ctype);
static const char* xmsg="<HTML><HEAD><TITLE>Shibboleth Error</TITLE></HEAD><BODY><H1>Shibboleth Error</H1>";
DWORD resplen=strlen(xmsg);
return HSE_STATUS_SUCCESS;
}
-DWORD WriteClientError(LPEXTENSION_CONTROL_BLOCK lpECB, const char* filename, ShibMLP& mlp)
+
+class ShibTargetIsapiE : public ShibTarget
{
- ifstream infile(filename);
- if (!infile)
- return WriteClientError(lpECB,"Unable to open error template, check settings.");
+ LPEXTENSION_CONTROL_BLOCK m_lpECB;
+ string m_cookie;
+
+ void checkString(const string& s, const char* msg) {
+ string::const_iterator e = s.end();
+ for (string::const_iterator i=s.begin(); i!=e; ++i) {
+ if (iscntrl(*i))
+ throw FatalProfileException(msg);
+ }
+ }
- string res = mlp.run(infile);
- static const char* ctype="Content-Type: text/html\r\n";
- lpECB->ServerSupportFunction(lpECB->ConnID,HSE_REQ_SEND_RESPONSE_HEADER,"200 OK",0,(LPDWORD)ctype);
- DWORD resplen=res.length();
- lpECB->WriteClient(lpECB->ConnID,(LPVOID)res.c_str(),&resplen,0);
- return HSE_STATUS_SUCCESS;
-}
+public:
+ ShibTargetIsapiE(LPEXTENSION_CONTROL_BLOCK lpECB, const site_t& site) {
+ dynabuf ssl(5);
+ GetServerVariable(lpECB,"HTTPS",ssl,5);
+ bool SSL=(ssl=="on" || ssl=="ON");
+
+ // URL path always come from IIS.
+ dynabuf url(256);
+ GetServerVariable(lpECB,"URL",url,255);
+
+ // Port may come from IIS or from site def.
+ dynabuf port(11);
+ if (!g_bNormalizeRequest || (SSL && site.m_sslport.empty()) || (!SSL && site.m_port.empty()))
+ GetServerVariable(lpECB,"SERVER_PORT",port,10);
+ else if (SSL) {
+ strncpy(port,site.m_sslport.c_str(),10);
+ static_cast<char*>(port)[10]=0;
+ }
+ else {
+ strncpy(port,site.m_port.c_str(),10);
+ static_cast<char*>(port)[10]=0;
+ }
+
+ // Scheme may come from site def or be derived from IIS.
+ const char* scheme=site.m_scheme.c_str();
+ if (!scheme || !*scheme || !g_bNormalizeRequest) {
+ scheme = SSL ? "https" : "http";
+ }
+
+ // Get the other server variables.
+ dynabuf remote_addr(16),hostname(32);
+ GetServerVariable(lpECB, "REMOTE_ADDR", remote_addr, 16);
+ GetServerVariable(lpECB, "SERVER_NAME", hostname, 32);
+
+ // Make sure SERVER_NAME is "authorized" for use on this site. If not, set to canonical name.
+ const char* host=hostname;
+ if (site.m_name!=host && site.m_aliases.find(host)==site.m_aliases.end())
+ host=site.m_name.c_str();
+
+ /*
+ * IIS screws us over on PATH_INFO (the hits keep on coming). We need to figure out if
+ * the server is set up for proper PATH_INFO handling, or "IIS sucks rabid weasels mode",
+ * which is the default. No perfect way to tell, but we can take a good guess by checking
+ * whether the URL is a substring of the PATH_INFO:
+ *
+ * e.g. for /Shibboleth.sso/SAML/POST
+ *
+ * Bad mode (default):
+ * URL: /Shibboleth.sso
+ * PathInfo: /Shibboleth.sso/SAML/POST
+ *
+ * Good mode:
+ * URL: /Shibboleth.sso
+ * PathInfo: /SAML/POST
+ */
+
+ string fullurl;
+
+ // Clearly we're only in bad mode if path info exists at all.
+ if (lpECB->lpszPathInfo && *(lpECB->lpszPathInfo)) {
+ if (strstr(lpECB->lpszPathInfo,url))
+ // Pretty good chance we're in bad mode, unless the PathInfo repeats the path itself.
+ fullurl=lpECB->lpszPathInfo;
+ else {
+ fullurl = url;
+ fullurl+=lpECB->lpszPathInfo;
+ }
+ }
+ else {
+ fullurl = url;
+ }
+
+ // For consistency with Apache, let's add the query string.
+ if (lpECB->lpszQueryString && *(lpECB->lpszQueryString)) {
+ fullurl+='?';
+ fullurl+=lpECB->lpszQueryString;
+ }
+ init(scheme, host, atoi(port), fullurl.c_str(), lpECB->lpszContentType, remote_addr, lpECB->lpszMethod);
+
+ m_lpECB = lpECB;
+ }
+ ~ShibTargetIsapiE() { }
+
+ virtual void log(ShibLogLevel level, const string &msg) {
+ ShibTarget::log(level,msg);
+ }
+ virtual string getCookies() const {
+ dynabuf buf(128);
+ GetServerVariable(m_lpECB, "HTTP_COOKIE", buf, 128, false);
+ return buf.empty() ? "" : buf;
+ }
+ virtual void setCookie(const string &name, const string &value) {
+ // Set the cookie for later. Use it during the redirect.
+ m_cookie += "Set-Cookie: " + name + "=" + value + "\r\n";
+ }
+ virtual string getArgs(void) {
+ return string(m_lpECB->lpszQueryString ? m_lpECB->lpszQueryString : "");
+ }
+ virtual string getPostData(void) {
+ if (m_lpECB->cbTotalBytes > 1024*1024) // 1MB?
+ throw FatalProfileException("Blocked too-large a submission to profile endpoint.");
+ else if (m_lpECB->cbTotalBytes > m_lpECB->cbAvailable) {
+ string cgistr(reinterpret_cast<char*>(m_lpECB->lpbData),m_lpECB->cbAvailable);
+ char buf[8192];
+ DWORD datalen=m_lpECB->cbTotalBytes - m_lpECB->cbAvailable;
+ while (datalen) {
+ DWORD buflen=8192;
+ BOOL ret = m_lpECB->ReadClient(m_lpECB->ConnID, buf, &buflen);
+ if (!ret || !buflen)
+ throw FatalProfileException("Error reading profile submission from browser.");
+ cgistr.append(buf, buflen);
+ datalen-=buflen;
+ }
+ return cgistr;
+ }
+ else {
+ return string(reinterpret_cast<char*>(m_lpECB->lpbData),m_lpECB->cbAvailable);
+ }
+ }
+ virtual void* sendPage(
+ const string &msg,
+ int code=200,
+ const string& content_type="text/html",
+ const Iterator<header_t>& headers=EMPTY(header_t)) {
+ checkString(content_type, "Detected control character in a response header.");
+ string hdr = m_cookie + "Connection: close\r\nContent-type: " + content_type + "\r\n";
+ for (int k = 0; k < headers.size(); k++) {
+ checkString(headers[k].first, "Detected control character in a response header.");
+ checkString(headers[k].second, "Detected control character in a response header.");
+ hdr += headers[k].first + ": " + headers[k].second + "\r\n";
+ }
+ hdr += "\r\n";
+ const char* codestr="200 OK";
+ switch (code) {
+ case 403: codestr="403 Forbidden"; break;
+ case 404: codestr="404 Not Found"; break;
+ case 500: codestr="500 Server Error"; break;
+ }
+ m_lpECB->ServerSupportFunction(m_lpECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER, (void*)codestr, 0, (LPDWORD)hdr.c_str());
+ DWORD resplen = msg.size();
+ m_lpECB->WriteClient(m_lpECB->ConnID, (LPVOID)msg.c_str(), &resplen, HSE_IO_SYNC);
+ return (void*)HSE_STATUS_SUCCESS;
+ }
+ virtual void* sendRedirect(const string& url) {
+ // XXX: Don't support the httpRedirect option, yet.
+ checkString(url, "Detected control character in an attempted redirect.");
+ if (g_allowedSchemes.find(url.substr(0, url.find(':'))) == g_allowedSchemes.end())
+ throw FatalProfileException("Invalid scheme in attempted redirect.");
+ string hdrs = m_cookie + "Location: " + url + "\r\n"
+ "Content-Type: text/html\r\n"
+ "Content-Length: 40\r\n"
+ "Expires: 01-Jan-1997 12:00:00 GMT\r\n"
+ "Cache-Control: private,no-store,no-cache\r\n\r\n";
+ m_lpECB->ServerSupportFunction(m_lpECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER,
+ "302 Moved", 0, (LPDWORD)hdrs.c_str());
+ static const char* redmsg="<HTML><BODY>Redirecting...</BODY></HTML>";
+ DWORD resplen=40;
+ m_lpECB->WriteClient(m_lpECB->ConnID, (LPVOID)redmsg, &resplen, HSE_IO_SYNC);
+ return (void*)HSE_STATUS_SUCCESS;
+ }
+ // Decline happens in the POST processor if this isn't the shire url
+ // Note that it can also happen with HTAccess, but we don't support that, yet.
+ virtual void* returnDecline(void) {
+ return (void*)
+ WriteClientError(m_lpECB, "ISAPI extension can only be invoked to process Shibboleth protocol requests."
+ "Make sure the mapped file extension doesn't match actual content.");
+ }
+ virtual void* returnOK(void) { return (void*) HSE_STATUS_SUCCESS; }
+
+ // Not used in the extension.
+ virtual void clearHeader(const string &name) { throw runtime_error("clearHeader not implemented"); }
+ virtual void setHeader(const string &name, const string &value) { throw runtime_error("setHeader not implemented"); }
+ virtual string getHeader(const string &name) { throw runtime_error("getHeader not implemented"); }
+ virtual void setRemoteUser(const string &user) { throw runtime_error("setRemoteUser not implemented"); }
+ virtual string getRemoteUser(void) { throw runtime_error("getRemoteUser not implemented"); }
+};
extern "C" DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB)
{
- ostringstream threadid;
- threadid << "[" << getpid() << "] shire" << '\0';
- saml::NDC ndc(threadid.str().c_str());
-
- ShibINI& ini = g_Config->getINI();
- string shireError;
- ShibMLP markupProcessor;
+ try {
+ ostringstream threadid;
+ threadid << "[" << getpid() << "] isapi_shib_extension" << '\0';
+ saml::NDC ndc(threadid.str().c_str());
- try
- {
// Determine web site number. This can't really fail, I don't think.
dynabuf buf(128);
- ULONG site_id=0;
GetServerVariable(lpECB,"INSTANCE_ID",buf,10);
- if ((site_id=strtoul(buf,NULL,10))==0)
- return WriteClientError(lpECB,"IIS site instance appears to be invalid.");
-
- // Match site instance to site settings.
- if (site_id>g_Sites.size() || g_Sites[site_id-1].m_name.length()==0)
- return WriteClientError(lpECB,"Shibboleth filter not configured for this web site.");
- settings_t& site=g_Sites[site_id-1];
-
- if (!ini.get_tag(site.m_name, "shireError", true, &shireError))
- return WriteClientError(lpECB,"The shireError configuration setting is missing, check configuration.");
-
- string target_url=get_target(lpECB,site);
- string shire_url = get_shire_location(site,target_url.c_str());
-
- // Set SHIRE policies.
- SHIREConfig config;
- string tag;
- config.checkIPAddress = (ini.get_tag(site.m_name,"checkIPAddress",true,&tag) && ShibINI::boolean(tag));
- config.lifetime=config.timeout=0;
- tag.erase();
- if (ini.get_tag(site.m_name, "authLifetime", true, &tag))
- config.lifetime=strtoul(tag.c_str(),NULL,10);
- tag.erase();
- if (ini.get_tag(site.m_name, "authTimeout", true, &tag))
- config.timeout=strtoul(tag.c_str(),NULL,10);
-
- // Pull the config data we need to handle the various possible conditions.
- string shib_cookie;
- if (!ini.get_tag(site.m_name, "cookieName", true, &shib_cookie))
- return WriteClientError(lpECB,"The cookieName configuration setting is missing, check configuration.");
-
- string wayfLocation;
- if (!ini.get_tag(site.m_name, "wayfURL", true, &wayfLocation))
- return WriteClientError(lpECB,"The wayfURL configuration setting is missing, check configuration.");
-
- bool has_tag = ini.get_tag(site.m_name, "supportContact", true, &tag);
- markupProcessor.insert("supportContact", has_tag ? tag : "");
- has_tag = ini.get_tag(site.m_name, "logoLocation", true, &tag);
- markupProcessor.insert("logoLocation", has_tag ? tag : "");
- markupProcessor.insert("requestURL", target_url.c_str());
-
- // Get an RPC handle and build the SHIRE object.
- RPCHandle* rpc_handle = (RPCHandle*)rpc_handle_key->getData();
- if (!rpc_handle)
- {
- rpc_handle = new RPCHandle(shib_target_sockname(), SHIBRPC_PROG, SHIBRPC_VERS_1);
- rpc_handle_key->setData(rpc_handle);
- }
- SHIRE shire(rpc_handle, config, shire_url.c_str());
- // Process SHIRE POST
- if (ini.get_tag(site.m_name, "shireSSLOnly", true, &tag) && ShibINI::boolean(tag))
- {
- // Make sure this is SSL, if it should be.
- GetServerVariable(lpECB,"HTTPS",buf,10);
- if (buf!="on")
- throw ShibTargetException(SHIBRPC_OK,"blocked non-SSL access to SHIRE POST processor");
- }
-
- // Make sure this is a POST
- if (stricmp(lpECB->lpszMethod,"POST"))
- throw ShibTargetException(SHIBRPC_OK,"blocked non-POST to SHIRE POST processor");
-
- // Sure sure this POST is an appropriate content type
- if (!lpECB->lpszContentType || stricmp(lpECB->lpszContentType,"application/x-www-form-urlencoded"))
- throw ShibTargetException(SHIBRPC_OK,"blocked bad content-type to SHIRE POST processor");
-
- // Make sure the "bytes sent" is a reasonable number and that we have all of it.
- if (lpECB->cbTotalBytes > 1024*1024) // 1MB?
- throw ShibTargetException (SHIBRPC_OK,"blocked too-large a post to SHIRE POST processor");
- else if (lpECB->cbTotalBytes>lpECB->cbAvailable)
- throw ShibTargetException (SHIBRPC_OK,"blocked incomplete post to SHIRE POST processor");
-
- // Parse the incoming data.
- HQUERY params=ParseQuery(lpECB);
- if (!params)
- throw ShibTargetException (SHIBRPC_OK,"unable to parse form data");
-
- // Make sure the TARGET parameter exists
- const char* target = QueryValue(params,"TARGET");
- if (!target || *target == '\0')
- throw ShibTargetException(SHIBRPC_OK,"SHIRE POST failed to find TARGET parameter");
-
- // Make sure the SAMLResponse parameter exists
- const char* post = QueryValue(params,"SAMLResponse");
- if (!post || *post == '\0')
- throw ShibTargetException (SHIBRPC_OK,"SHIRE POST failed to find SAMLResponse parameter");
-
- GetServerVariable(lpECB,"REMOTE_ADDR",buf,16);
-
- // Process the post.
- string cookie;
- RPCError* status = shire.sessionCreate(post,buf,cookie);
-
- if (status->isError()) {
- if (status->isRetryable()) {
- delete status;
- string wayf=wayfLocation + "?shire=" + url_encode(shire_url.c_str()) + "&target=" + url_encode(target);
- DWORD len=wayf.length();
- if (lpECB->ServerSupportFunction(lpECB->ConnID,HSE_REQ_SEND_URL_REDIRECT_RESP,(LPVOID)wayf.c_str(),&len,0))
- return HSE_STATUS_SUCCESS;
- return HSE_STATUS_ERROR;
- }
-
- // Return this error to the user.
- markupProcessor.insert(*status);
- delete status;
- return WriteClientError(lpECB,shireError.c_str(),markupProcessor);
- }
- delete status;
-
- // We've got a good session, set the cookie and redirect to target.
- shib_cookie = "Set-Cookie: " + shib_cookie + '=' + cookie + "; path=/\r\n"
- "Location: " + target + "\r\n"
- "Expires: 01-Jan-1997 12:00:00 GMT\r\n"
- "Cache-Control: private,no-store,no-cache\r\n"
- "Connection: close\r\n";
- HSE_SEND_HEADER_EX_INFO hinfo;
- hinfo.pszStatus="302 Moved";
- hinfo.pszHeader=shib_cookie.c_str();
- hinfo.cchStatus=9;
- hinfo.cchHeader=shib_cookie.length();
- hinfo.fKeepConn=FALSE;
- if (lpECB->ServerSupportFunction(lpECB->ConnID,HSE_REQ_SEND_RESPONSE_HEADER_EX,&hinfo,0,0))
- return HSE_STATUS_SUCCESS;
- }
- catch (ShibTargetException &e) {
- markupProcessor.insert ("errorType", "SHIRE Processing Error");
- markupProcessor.insert ("errorText", e.what());
- markupProcessor.insert ("errorDesc", "An error occurred while processing your request.");
- return WriteClientError(lpECB,shireError.c_str(),markupProcessor);
- }
- catch (...) {
- markupProcessor.insert ("errorType", "SHIRE Processing Error");
- markupProcessor.insert ("errorText", "Unexpected Exception");
- markupProcessor.insert ("errorDesc", "An error occurred while processing your request.");
- return WriteClientError(lpECB,shireError.c_str(),markupProcessor);
- }
-
+ // Match site instance to host name, skip if no match.
+ map<string,site_t>::const_iterator map_i=g_Sites.find(static_cast<char*>(buf));
+ if (map_i==g_Sites.end())
+ return WriteClientError(lpECB, "Shibboleth Extension not configured for this web site.");
+
+ ShibTargetIsapiE ste(lpECB, map_i->second);
+ pair<bool,void*> res = ste.doHandler();
+ if (res.first) return (DWORD)res.second;
+
+ return WriteClientError(lpECB, "Shibboleth Extension failed to process request");
+
+ }
+ catch(bad_alloc) {
+ return WriteClientError(lpECB,"Out of Memory");
+ }
+ catch(long e) {
+ if (e==ERROR_NO_DATA)
+ return WriteClientError(lpECB,"A required variable or header was empty.");
+ else
+ return WriteClientError(lpECB,"Server detected unexpected IIS error.");
+ }
+ catch (exception& e) {
+ LogEvent(NULL, EVENTLOG_ERROR_TYPE, 2100, NULL, e.what());
+ return WriteClientError(lpECB,"Shibboleth Extension caught an exception, check Event Log for details.");
+ }
+ catch(...) {
+ if (g_catchAll)
+ return WriteClientError(lpECB,"Shibboleth Extension caught an unknown exception.");
+ throw;
+ }
+
+ // If we get here we've got an error.
return HSE_STATUS_ERROR;
}
-
projects / shibboleth / cpp-sp.git / blobdiff