shibsp/handler/impl/AbstractHandler.cpp

   1 /**
   2  * Licensed to the University Corporation for Advanced Internet
   3  * Development, Inc. (UCAID) under one or more contributor license
   4  * agreements. See the NOTICE file distributed with this work for
   5  * additional information regarding copyright ownership.
   6  *
   7  * UCAID licenses this file to you under the Apache License,
   8  * Version 2.0 (the "License"); you may not use this file except
   9  * in compliance with the License. You may obtain a copy of the
  10  * License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing,
  15  * software distributed under the License is distributed on an
  16  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
  17  * either express or implied. See the License for the specific
  18  * language governing permissions and limitations under the License.
  19  */
  20
  21 /**
  22  * AbstractHandler.cpp
  23  *
  24  * Base class for handlers based on a DOMPropertySet.
  25  */
  26
  27 #include "internal.h"
  28 #include "exceptions.h"
  29 #include "Application.h"
  30 #include "ServiceProvider.h"
  31 #include "SPRequest.h"
  32 #include "handler/AbstractHandler.h"
  33 #include "handler/LogoutHandler.h"
  34 #include "remoting/ListenerService.h"
  35 #include "util/CGIParser.h"
  36 #include "util/SPConstants.h"
  37 #include "util/TemplateParameters.h"
  38
  39 #include <vector>
  40 #include <fstream>
  41 #include <boost/bind.hpp>
  42 #include <boost/lexical_cast.hpp>
  43 #include <boost/algorithm/string.hpp>
  44 #include <xmltooling/XMLToolingConfig.h>
  45 #include <xmltooling/util/PathResolver.h>
  46 #include <xmltooling/util/URLEncoder.h>
  47
  48
  49 #ifndef SHIBSP_LITE
  50 # include <saml/exceptions.h>
  51 # include <saml/SAMLConfig.h>
  52 # include <saml/binding/SAMLArtifact.h>
  53 # include <saml/saml1/core/Protocols.h>
  54 # include <saml/saml2/core/Protocols.h>
  55 # include <saml/saml2/metadata/Metadata.h>
  56 # include <saml/saml2/metadata/MetadataCredentialCriteria.h>
  57 # include <saml/util/SAMLConstants.h>
  58 # include <xmltooling/security/Credential.h>
  59 # include <xmltooling/security/CredentialResolver.h>
  60 # include <xmltooling/util/StorageService.h>
  61 using namespace opensaml::saml2md;
  62 using namespace opensaml;
  63 #else
  64 # include "lite/SAMLConstants.h"
  65 #endif
  66
  67 #include <xmltooling/XMLToolingConfig.h>
  68 #include <xmltooling/util/URLEncoder.h>
  69
  70 using namespace shibsp;
  71 using namespace samlconstants;
  72 using namespace xmltooling;
  73 using namespace xercesc;
  74 using namespace boost;
  75 using namespace std;
  76
  77 namespace shibsp {
  78     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SAML1ConsumerFactory;
  79     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SAML2ConsumerFactory;
  80     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SAML2ArtifactResolutionFactory;
  81     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SAML2LogoutFactory;
  82     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SAML2NameIDMgmtFactory;
  83     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory AssertionLookupFactory;
  84     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory AttributeCheckerFactory;
  85     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory DiscoveryFeedFactory;
  86     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory ExternalAuthFactory;
  87     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory MetadataGeneratorFactory;
  88     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory StatusHandlerFactory;
  89     SHIBSP_DLLLOCAL PluginManager< Handler,string,pair<const DOMElement*,const char*> >::Factory SessionHandlerFactory;
  90
  91
  92     void SHIBSP_DLLLOCAL generateRandomHex(std::string& buf, unsigned int len) {
  93         static char DIGITS[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
  94         int r;
  95         unsigned char b1,b2;
  96         buf.erase();
  97         for (unsigned int i=0; i<len; i+=4) {
  98             r = rand();
  99             b1 = (0x00FF & r);
 100             b2 = (0xFF00 & r)  >> 8;
 101             buf += (DIGITS[(0xF0 & b1) >> 4 ]);
 102             buf += (DIGITS[0x0F & b1]);
 103             buf += (DIGITS[(0xF0 & b2) >> 4 ]);
 104             buf += (DIGITS[0x0F & b2]);
 105         }
 106     }
 107 };
 108
 109 void SHIBSP_API shibsp::registerHandlers()
 110 {
 111     SPConfig& conf=SPConfig::getConfig();
 112
 113     conf.AssertionConsumerServiceManager.registerFactory(SAML1_ASSERTION_CONSUMER_SERVICE, SAML1ConsumerFactory);
 114     conf.AssertionConsumerServiceManager.registerFactory(SAML1_PROFILE_BROWSER_ARTIFACT, SAML1ConsumerFactory);
 115     conf.AssertionConsumerServiceManager.registerFactory(SAML1_PROFILE_BROWSER_POST, SAML1ConsumerFactory);
 116     conf.AssertionConsumerServiceManager.registerFactory(SAML20_ASSERTION_CONSUMER_SERVICE, SAML2ConsumerFactory);
 117     conf.AssertionConsumerServiceManager.registerFactory(SAML20_BINDING_HTTP_POST, SAML2ConsumerFactory);
 118     conf.AssertionConsumerServiceManager.registerFactory(SAML20_BINDING_HTTP_POST_SIMPLESIGN, SAML2ConsumerFactory);
 119     conf.AssertionConsumerServiceManager.registerFactory(SAML20_BINDING_HTTP_ARTIFACT, SAML2ConsumerFactory);
 120     conf.AssertionConsumerServiceManager.registerFactory(SAML20_BINDING_PAOS, SAML2ConsumerFactory);
 121
 122     conf.ArtifactResolutionServiceManager.registerFactory(SAML20_ARTIFACT_RESOLUTION_SERVICE, SAML2ArtifactResolutionFactory);
 123     conf.ArtifactResolutionServiceManager.registerFactory(SAML20_BINDING_SOAP, SAML2ArtifactResolutionFactory);
 124
 125     conf.HandlerManager.registerFactory(SAML20_BINDING_URI, AssertionLookupFactory);
 126     conf.HandlerManager.registerFactory(ATTR_CHECKER_HANDLER, AttributeCheckerFactory);
 127     conf.HandlerManager.registerFactory(DISCOVERY_FEED_HANDLER, DiscoveryFeedFactory);
 128     conf.HandlerManager.registerFactory(EXTERNAL_AUTH_HANDLER, ExternalAuthFactory);
 129     conf.HandlerManager.registerFactory(METADATA_GENERATOR_HANDLER, MetadataGeneratorFactory);
 130     conf.HandlerManager.registerFactory(STATUS_HANDLER, StatusHandlerFactory);
 131     conf.HandlerManager.registerFactory(SESSION_HANDLER, SessionHandlerFactory);
 132
 133     conf.SingleLogoutServiceManager.registerFactory(SAML20_LOGOUT_HANDLER, SAML2LogoutFactory);
 134     conf.SingleLogoutServiceManager.registerFactory(SAML20_BINDING_SOAP, SAML2LogoutFactory);
 135     conf.SingleLogoutServiceManager.registerFactory(SAML20_BINDING_HTTP_REDIRECT, SAML2LogoutFactory);
 136     conf.SingleLogoutServiceManager.registerFactory(SAML20_BINDING_HTTP_POST, SAML2LogoutFactory);
 137     conf.SingleLogoutServiceManager.registerFactory(SAML20_BINDING_HTTP_POST_SIMPLESIGN, SAML2LogoutFactory);
 138     conf.SingleLogoutServiceManager.registerFactory(SAML20_BINDING_HTTP_ARTIFACT, SAML2LogoutFactory);
 139
 140     conf.ManageNameIDServiceManager.registerFactory(SAML20_NAMEID_MGMT_SERVICE, SAML2NameIDMgmtFactory);
 141     conf.ManageNameIDServiceManager.registerFactory(SAML20_BINDING_SOAP, SAML2NameIDMgmtFactory);
 142     conf.ManageNameIDServiceManager.registerFactory(SAML20_BINDING_HTTP_REDIRECT, SAML2NameIDMgmtFactory);
 143     conf.ManageNameIDServiceManager.registerFactory(SAML20_BINDING_HTTP_POST, SAML2NameIDMgmtFactory);
 144     conf.ManageNameIDServiceManager.registerFactory(SAML20_BINDING_HTTP_POST_SIMPLESIGN, SAML2NameIDMgmtFactory);
 145     conf.ManageNameIDServiceManager.registerFactory(SAML20_BINDING_HTTP_ARTIFACT, SAML2NameIDMgmtFactory);
 146 }
 147
 148 Handler::Handler()
 149 {
 150 }
 151
 152 Handler::~Handler()
 153 {
 154 }
 155
 156 #ifndef SHIBSP_LITE
 157
 158 void Handler::generateMetadata(SPSSODescriptor& role, const char* handlerURL) const
 159 {
 160 }
 161
 162 #endif
 163
 164 const XMLCh* Handler::getProtocolFamily() const
 165 {
 166     return nullptr;
 167 }
 168
 169 void Handler::log(SPRequest::SPLogLevel level, const string& msg) const
 170 {
 171     Category::getInstance(SHIBSP_LOGCAT".Handler").log(
 172         (level == SPRequest::SPDebug ? Priority::DEBUG :
 173         (level == SPRequest::SPInfo ? Priority::INFO :
 174         (level == SPRequest::SPWarn ? Priority::WARN :
 175         (level == SPRequest::SPError ? Priority::ERROR : Priority::CRIT)))),
 176         msg
 177         );
 178 }
 179
 180 void Handler::cleanRelayState(
 181     const Application& application, const xmltooling::HTTPRequest& request, xmltooling::HTTPResponse& response
 182     ) const
 183 {
 184     // Only cookie-based relay state requires cleaning.
 185     pair<bool,const char*> mech = getString("relayState");
 186     if (!mech.first) {
 187         // Check for setting on Sessions element.
 188         const PropertySet* sessionprop = application.getPropertySet("Sessions");
 189         if (sessionprop)
 190             mech = sessionprop->getString("relayState");
 191     }
 192     if (!mech.first || !mech.second || strncmp(mech.second, "cookie", 6))
 193         return;
 194
 195     int maxCookies = 25,purgedCookies = 0;
 196     mech.second += 6;
 197     if (*mech.second == ':' && isdigit(*(++mech.second))) {
 198         maxCookies = atoi(mech.second);
 199         if (maxCookies == 0)
 200             maxCookies = 25;
 201     }
 202
 203     string exp;
 204
 205     // Walk the list of cookies backwards by name.
 206     const map<string,string>& cookies = request.getCookies();
 207     for (map<string,string>::const_reverse_iterator i = cookies.rbegin(); i != cookies.rend(); ++i) {
 208         // Process relay state cookies only.
 209         if (starts_with(i->first, "_shibstate_")) {
 210             if (maxCookies > 0) {
 211                 // Keep it, but count it against the limit.
 212                 --maxCookies;
 213             }
 214             else {
 215                 // We're over the limit, so everything here and older gets cleaned up.
 216                 if (exp.empty())
 217                     exp = string(application.getCookieNameProps("_shibstate_").second) + "; expires=Mon, 01 Jan 2001 00:00:00 GMT";
 218                 response.setCookie(i->first.c_str(), exp.c_str());
 219                 ++purgedCookies;
 220             }
 221         }
 222     }
 223
 224     if (purgedCookies > 0)
 225         log(SPRequest::SPDebug, string("purged ") + lexical_cast<string>(purgedCookies) + " stale relay state cookie(s) from client");
 226 }
 227
 228 void Handler::preserveRelayState(const Application& application, HTTPResponse& response, string& relayState) const
 229 {
 230     // The empty string implies no state to deal with.
 231     if (relayState.empty())
 232         return;
 233
 234     // No setting means just pass state by value.
 235     pair<bool,const char*> mech = getString("relayState");
 236     if (!mech.first) {
 237         // Check for setting on Sessions element.
 238         const PropertySet* sessionprop = application.getPropertySet("Sessions");
 239         if (sessionprop)
 240             mech = sessionprop->getString("relayState");
 241     }
 242     if (!mech.first || !mech.second || !*mech.second)
 243         return;
 244
 245     if (!strncmp(mech.second, "cookie", 6)) {
 246         // Here we store the state in a cookie and send a fixed
 247         // value so we can recognize it on the way back.
 248         if (relayState.find("cookie:") != 0) {
 249             pair<string,const char*> shib_cookie = application.getCookieNameProps("_shibstate_");
 250             string stateval = XMLToolingConfig::getConfig().getURLEncoder()->encode(relayState.c_str()) + shib_cookie.second;
 251             // Generate a random key for the cookie name instead of the fixed name.
 252             string rsKey;
 253             generateRandomHex(rsKey, 4);
 254             rsKey = lexical_cast<string>(time(nullptr)) + '_' + rsKey;
 255             shib_cookie.first = "_shibstate_" + rsKey;
 256             response.setCookie(shib_cookie.first.c_str(), stateval.c_str());
 257             relayState = "cookie:" + rsKey;
 258         }
 259     }
 260     else if (!strncmp(mech.second, "ss:", 3)) {
 261         if (relayState.find("ss:") != 0) {
 262             mech.second+=3;
 263             if (*mech.second) {
 264                 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
 265 #ifndef SHIBSP_LITE
 266                     StorageService* storage = application.getServiceProvider().getStorageService(mech.second);
 267                     if (storage) {
 268                         // Use a random key
 269                         string rsKey;
 270                         SAMLConfig::getConfig().generateRandomBytes(rsKey,32);
 271                         rsKey = SAMLArtifact::toHex(rsKey);
 272                         if (relayState.length() <= storage->getCapabilities().getStringSize()) {
 273                             if (!storage->createString("RelayState", rsKey.c_str(), relayState.c_str(), time(nullptr) + 600))
 274                                 throw IOException("Collision generating in-memory relay state key.");
 275                         }
 276                         else {
 277                             if (!storage->createText("RelayState", rsKey.c_str(), relayState.c_str(), time(nullptr) + 600))
 278                                 throw IOException("Collision generating in-memory relay state key.");
 279                         }
 280                         relayState = string(mech.second-3) + ':' + rsKey;
 281                     }
 282                     else {
 283                         string msg("Storage-backed RelayState with invalid StorageService ID (");
 284                         msg = msg + mech.second+ ')';
 285                         log(SPRequest::SPError, msg);
 286                         relayState.erase();
 287                     }
 288 #else
 289                     throw ConfigurationException("Lite version of library cannot be used out of process.");
 290 #endif
 291                 }
 292                 else if (SPConfig::getConfig().isEnabled(SPConfig::InProcess)) {
 293                     DDF out,in = DDF("set::RelayState").structure();
 294                     in.addmember("id").string(mech.second);
 295                     in.addmember("value").unsafe_string(relayState.c_str());
 296                     DDFJanitor jin(in),jout(out);
 297                     out = application.getServiceProvider().getListenerService()->send(in);
 298                     if (!out.isstring())
 299                         throw IOException("StorageService-backed RelayState mechanism did not return a state key.");
 300                     relayState = string(mech.second-3) + ':' + out.string();
 301                 }
 302             }
 303         }
 304     }
 305     else
 306         throw ConfigurationException("Unsupported relayState mechanism ($1).", params(1,mech.second));
 307 }
 308
 309 void Handler::recoverRelayState(
 310     const Application& application, const HTTPRequest& request, HTTPResponse& response, string& relayState, bool clear
 311     ) const
 312 {
 313     SPConfig& conf = SPConfig::getConfig();
 314
 315     // Look for StorageService-backed state of the form "ss:SSID:key".
 316     const char* state = relayState.c_str();
 317     if (strstr(state,"ss:")==state) {
 318         state += 3;
 319         const char* key = strchr(state,':');
 320         if (key) {
 321             string ssid = relayState.substr(3, key - state);
 322             key++;
 323             if (!ssid.empty() && *key) {
 324                 if (conf.isEnabled(SPConfig::OutOfProcess)) {
 325 #ifndef SHIBSP_LITE
 326                     StorageService* storage = conf.getServiceProvider()->getStorageService(ssid.c_str());
 327                     if (storage) {
 328                         ssid = key;
 329                         if (storage->readString("RelayState",ssid.c_str(),&relayState) > 0) {
 330                             if (clear)
 331                                 storage->deleteString("RelayState",ssid.c_str());
 332                             request.absolutize(relayState);
 333                             return;
 334                         }
 335                         else if (storage->readText("RelayState",ssid.c_str(),&relayState) > 0) {
 336                             if (clear)
 337                                 storage->deleteText("RelayState",ssid.c_str());
 338                             request.absolutize(relayState);
 339                             return;
 340                         }
 341                         else {
 342                             relayState.erase();
 343                         }
 344                     }
 345                     else {
 346                         string msg("Storage-backed RelayState with invalid StorageService ID (");
 347                         msg += ssid + ')';
 348                         log(SPRequest::SPError, msg);
 349                         relayState.erase();
 350                     }
 351 #endif
 352                 }
 353                 else if (conf.isEnabled(SPConfig::InProcess)) {
 354                     DDF out,in = DDF("get::RelayState").structure();
 355                     in.addmember("id").string(ssid.c_str());
 356                     in.addmember("key").string(key);
 357                     in.addmember("clear").integer(clear ? 1 : 0);
 358                     DDFJanitor jin(in),jout(out);
 359                     out = application.getServiceProvider().getListenerService()->send(in);
 360                     if (!out.isstring()) {
 361                         log(SPRequest::SPError, "StorageService-backed RelayState mechanism did not return a state value.");
 362                         relayState.erase();
 363                     }
 364                     else {
 365                         relayState = out.string();
 366                         request.absolutize(relayState);
 367                         return;
 368                     }
 369                 }
 370             }
 371         }
 372     }
 373
 374     // Look for cookie-backed state of the form "cookie:timestamp_key".
 375     if (strstr(state,"cookie:")==state) {
 376         state += 7;
 377         if (*state) {
 378             // Pull the value from the "relay state" cookie.
 379             pair<string,const char*> relay_cookie = application.getCookieNameProps("_shibstate_");
 380             relay_cookie.first = string("_shibstate_") + state;
 381             state = request.getCookie(relay_cookie.first.c_str());
 382             if (state && *state) {
 383                 // URL-decode the value.
 384                 char* rscopy = strdup(state);
 385                 XMLToolingConfig::getConfig().getURLEncoder()->decode(rscopy);
 386                 relayState = rscopy;
 387                 free(rscopy);
 388                 if (clear) {
 389                     string exp(relay_cookie.second);
 390                     exp += "; expires=Mon, 01 Jan 2001 00:00:00 GMT";
 391                     response.setCookie(relay_cookie.first.c_str(), exp.c_str());
 392                 }
 393                 request.absolutize(relayState);
 394                 return;
 395             }
 396         }
 397
 398         relayState.erase();
 399     }
 400
 401     // Check for "default" value (or the old "cookie" value that might come from stale bookmarks).
 402     if (relayState.empty() || relayState == "default" || relayState == "cookie") {
 403         pair<bool,const char*> homeURL=application.getString("homeURL");
 404         if (homeURL.first)
 405             relayState = homeURL.second;
 406         else
 407             relayState = '/';
 408     }
 409
 410     request.absolutize(relayState);
 411 }
 412
 413 AbstractHandler::AbstractHandler(
 414     const DOMElement* e, Category& log, DOMNodeFilter* filter, const map<string,string>* remapper
 415     ) : m_log(log), m_configNS(shibspconstants::SHIB2SPCONFIG_NS) {
 416     load(e, nullptr, filter, remapper);
 417 }
 418
 419 AbstractHandler::~AbstractHandler()
 420 {
 421 }
 422
 423 void AbstractHandler::log(SPRequest::SPLogLevel level, const string& msg) const
 424 {
 425     m_log.log(
 426         (level == SPRequest::SPDebug ? Priority::DEBUG :
 427         (level == SPRequest::SPInfo ? Priority::INFO :
 428         (level == SPRequest::SPWarn ? Priority::WARN :
 429         (level == SPRequest::SPError ? Priority::ERROR : Priority::CRIT)))),
 430         msg
 431         );
 432 }
 433
 434 #ifndef SHIBSP_LITE
 435
 436 const char* Handler::getType() const
 437 {
 438     return getString("type").second;
 439 }
 440
 441 void AbstractHandler::checkError(const XMLObject* response, const saml2md::RoleDescriptor* role) const
 442 {
 443     const saml2p::StatusResponseType* r2 = dynamic_cast<const saml2p::StatusResponseType*>(response);
 444     if (r2) {
 445         const saml2p::Status* status = r2->getStatus();
 446         if (status) {
 447             const saml2p::StatusCode* sc = status->getStatusCode();
 448             const XMLCh* code = sc ? sc->getValue() : nullptr;
 449             if (code && !XMLString::equals(code,saml2p::StatusCode::SUCCESS)) {
 450                 FatalProfileException ex("SAML response contained an error.");
 451                 annotateException(&ex, role, status);   // throws it
 452             }
 453         }
 454     }
 455
 456     const saml1p::Response* r1 = dynamic_cast<const saml1p::Response*>(response);
 457     if (r1) {
 458         const saml1p::Status* status = r1->getStatus();
 459         if (status) {
 460             const saml1p::StatusCode* sc = status->getStatusCode();
 461             const xmltooling::QName* code = sc ? sc->getValue() : nullptr;
 462             if (code && *code != saml1p::StatusCode::SUCCESS) {
 463                 FatalProfileException ex("SAML response contained an error.");
 464                 annotateException(&ex, role, status);   // throws it
 465             }
 466         }
 467     }
 468 }
 469
 470 void AbstractHandler::fillStatus(saml2p::StatusResponseType& response, const XMLCh* code, const XMLCh* subcode, const char* msg) const
 471 {
 472     saml2p::Status* status = saml2p::StatusBuilder::buildStatus();
 473     saml2p::StatusCode* scode = saml2p::StatusCodeBuilder::buildStatusCode();
 474     status->setStatusCode(scode);
 475     scode->setValue(code);
 476     if (subcode) {
 477         saml2p::StatusCode* ssubcode = saml2p::StatusCodeBuilder::buildStatusCode();
 478         scode->setStatusCode(ssubcode);
 479         ssubcode->setValue(subcode);
 480     }
 481     if (msg) {
 482         pair<bool,bool> flag = getBool("detailedErrors", m_configNS.get());
 483         auto_ptr_XMLCh widemsg((flag.first && flag.second) ? msg : "Error processing request.");
 484         saml2p::StatusMessage* sm = saml2p::StatusMessageBuilder::buildStatusMessage();
 485         status->setStatusMessage(sm);
 486         sm->setMessage(widemsg.get());
 487     }
 488     response.setStatus(status);
 489 }
 490
 491 long AbstractHandler::sendMessage(
 492     const MessageEncoder& encoder,
 493     XMLObject* msg,
 494     const char* relayState,
 495     const char* destination,
 496     const saml2md::RoleDescriptor* role,
 497     const Application& application,
 498     HTTPResponse& httpResponse,
 499     bool signIfPossible
 500     ) const
 501 {
 502     const EntityDescriptor* entity = role ? dynamic_cast<const EntityDescriptor*>(role->getParent()) : nullptr;
 503     const PropertySet* relyingParty = application.getRelyingParty(entity);
 504     pair<bool,const char*> flag = signIfPossible ? make_pair(true,(const char*)"true") : relyingParty->getString("signing");
 505     if (flag.first && (!strcmp(flag.second, "true") ||
 506                         (encoder.isUserAgentPresent() && !strcmp(flag.second, "front")) ||
 507                         (!encoder.isUserAgentPresent() && !strcmp(flag.second, "back")))) {
 508         CredentialResolver* credResolver = application.getCredentialResolver();
 509         if (credResolver) {
 510             Locker credLocker(credResolver);
 511             const Credential* cred = nullptr;
 512             pair<bool,const char*> keyName = relyingParty->getString("keyName");
 513             pair<bool,const XMLCh*> sigalg = relyingParty->getXMLString("signingAlg");
 514             if (role) {
 515                 MetadataCredentialCriteria mcc(*role);
 516                 mcc.setUsage(Credential::SIGNING_CREDENTIAL);
 517                 if (keyName.first)
 518                     mcc.getKeyNames().insert(keyName.second);
 519                 if (sigalg.first) {
 520                     // Using an explicit algorithm, so resolve a credential directly.
 521                     mcc.setXMLAlgorithm(sigalg.second);
 522                     cred = credResolver->resolve(&mcc);
 523                 }
 524                 else {
 525                     // Prefer credential based on peer's requirements.
 526                     pair<const SigningMethod*,const Credential*> p = role->getSigningMethod(*credResolver, mcc);
 527                     if (p.first)
 528                         sigalg = make_pair(true, p.first->getAlgorithm());
 529                     if (p.second)
 530                         cred = p.second;
 531                 }
 532             }
 533             else {
 534                 CredentialCriteria cc;
 535                 cc.setUsage(Credential::SIGNING_CREDENTIAL);
 536                 if (keyName.first)
 537                     cc.getKeyNames().insert(keyName.second);
 538                 if (sigalg.first)
 539                     cc.setXMLAlgorithm(sigalg.second);
 540                 cred = credResolver->resolve(&cc);
 541             }
 542             if (cred) {
 543                 // Signed request.
 544                 pair<bool,const XMLCh*> digalg = relyingParty->getXMLString("digestAlg");
 545                 if (!digalg.first && role) {
 546                     const DigestMethod* dm = role->getDigestMethod();
 547                     if (dm)
 548                         digalg = make_pair(true, dm->getAlgorithm());
 549                 }
 550                 return encoder.encode(
 551                     httpResponse,
 552                     msg,
 553                     destination,
 554                     entity,
 555                     relayState,
 556                     &application,
 557                     cred,
 558                     sigalg.second,
 559                     (digalg.first ? digalg.second : nullptr)
 560                     );
 561             }
 562             else {
 563                 m_log.warn("no signing credential resolved, leaving message unsigned");
 564             }
 565         }
 566         else {
 567             m_log.warn("no credential resolver installed, leaving message unsigned");
 568         }
 569     }
 570
 571     // Unsigned request.
 572     return encoder.encode(httpResponse, msg, destination, entity, relayState, &application);
 573 }
 574
 575 #endif
 576
 577 void AbstractHandler::preservePostData(
 578     const Application& application, const HTTPRequest& request, HTTPResponse& response, const char* relayState
 579     ) const
 580 {
 581 #ifdef HAVE_STRCASECMP
 582     if (strcasecmp(request.getMethod(), "POST")) return;
 583 #else
 584     if (stricmp(request.getMethod(), "POST")) return;
 585 #endif
 586
 587     // No specs mean no save.
 588     const PropertySet* props=application.getPropertySet("Sessions");
 589     pair<bool,const char*> mech = props ? props->getString("postData") : pair<bool,const char*>(false,nullptr);
 590     if (!mech.first) {
 591         m_log.info("postData property not supplied, form data will not be preserved across SSO");
 592         return;
 593     }
 594
 595     DDF postData = getPostData(application, request);
 596     if (postData.isnull())
 597         return;
 598
 599     if (strstr(mech.second,"ss:") == mech.second) {
 600         mech.second+=3;
 601         if (!*mech.second) {
 602             postData.destroy();
 603             throw ConfigurationException("Unsupported postData mechanism ($1).", params(1, mech.second - 3));
 604         }
 605
 606         string postkey;
 607         if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
 608             DDFJanitor postjan(postData);
 609 #ifndef SHIBSP_LITE
 610             StorageService* storage = application.getServiceProvider().getStorageService(mech.second);
 611             if (storage) {
 612                 // Use a random key
 613                 string rsKey;
 614                 SAMLConfig::getConfig().generateRandomBytes(rsKey, 32);
 615                 rsKey = SAMLArtifact::toHex(rsKey);
 616                 ostringstream out;
 617                 out << postData;
 618                 if (!storage->createText("PostData", rsKey.c_str(), out.str().c_str(), time(nullptr) + 600))
 619                     throw IOException("Attempted to insert duplicate storage key.");
 620                 postkey = string(mech.second-3) + ':' + rsKey;
 621             }
 622             else {
 623                 m_log.error("storage-backed PostData mechanism with invalid StorageService ID (%s)", mech.second);
 624             }
 625 #else
 626             throw ConfigurationException("Lite version of library cannot be used out of process.");
 627 #endif
 628         }
 629         else if (SPConfig::getConfig().isEnabled(SPConfig::InProcess)) {
 630             DDF out,in = DDF("set::PostData").structure();
 631             DDFJanitor jin(in),jout(out);
 632             in.addmember("id").string(mech.second);
 633             in.add(postData);
 634             out = application.getServiceProvider().getListenerService()->send(in);
 635             if (!out.isstring())
 636                 throw IOException("StorageService-backed PostData mechanism did not return a state key.");
 637             postkey = string(mech.second-3) + ':' + out.string();
 638         }
 639
 640         // Set a cookie with key info.
 641         pair<string,const char*> shib_cookie = getPostCookieNameProps(application, relayState);
 642         postkey += shib_cookie.second;
 643         response.setCookie(shib_cookie.first.c_str(), postkey.c_str());
 644     }
 645     else {
 646         postData.destroy();
 647         throw ConfigurationException("Unsupported postData mechanism ($1).", params(1,mech.second));
 648     }
 649 }
 650
 651 DDF AbstractHandler::recoverPostData(
 652     const Application& application, const HTTPRequest& request, HTTPResponse& response, const char* relayState
 653     ) const
 654 {
 655     // First we need the post recovery cookie.
 656     pair<string,const char*> shib_cookie = getPostCookieNameProps(application, relayState);
 657     const char* cookie = request.getCookie(shib_cookie.first.c_str());
 658     if (!cookie || !*cookie)
 659         return DDF();
 660
 661     // Clear the cookie.
 662     string exp(shib_cookie.second);
 663     exp += "; expires=Mon, 01 Jan 2001 00:00:00 GMT";
 664     response.setCookie(shib_cookie.first.c_str(), exp.c_str());
 665
 666     // Look for StorageService-backed state of the form "ss:SSID:key".
 667     const char* state = cookie;
 668     if (strstr(state, "ss:") == state) {
 669         state += 3;
 670         const char* key = strchr(state, ':');
 671         if (key) {
 672             string ssid = string(cookie).substr(3, key - state);
 673             key++;
 674             if (!ssid.empty() && *key) {
 675                 SPConfig& conf = SPConfig::getConfig();
 676                 if (conf.isEnabled(SPConfig::OutOfProcess)) {
 677 #ifndef SHIBSP_LITE
 678                     StorageService* storage = conf.getServiceProvider()->getStorageService(ssid.c_str());
 679                     if (storage) {
 680                         if (storage->readText("PostData", key, &ssid) > 0) {
 681                             storage->deleteText("PostData", key);
 682                             istringstream inret(ssid);
 683                             DDF ret;
 684                             inret >> ret;
 685                             return ret;
 686                         }
 687                         else {
 688                             m_log.error("failed to recover form post data using key (%s)", key);
 689                         }
 690                     }
 691                     else {
 692                         m_log.error("storage-backed PostData with invalid StorageService ID (%s)", ssid.c_str());
 693                     }
 694 #endif
 695                 }
 696                 else if (conf.isEnabled(SPConfig::InProcess)) {
 697                     DDF in = DDF("get::PostData").structure();
 698                     DDFJanitor jin(in);
 699                     in.addmember("id").string(ssid.c_str());
 700                     in.addmember("key").string(key);
 701                     DDF out = application.getServiceProvider().getListenerService()->send(in);
 702                     if (out.islist())
 703                         return out;
 704                     out.destroy();
 705                     m_log.error("storageService-backed PostData mechanism did not return preserved data.");
 706                 }
 707             }
 708         }
 709     }
 710     return DDF();
 711 }
 712
 713 long AbstractHandler::sendPostResponse(
 714     const Application& application, HTTPResponse& httpResponse, const char* url, DDF& postData
 715     ) const
 716 {
 717     HTTPResponse::sanitizeURL(url);
 718
 719     const PropertySet* props=application.getPropertySet("Sessions");
 720     pair<bool,const char*> postTemplate = props ? props->getString("postTemplate") : pair<bool,const char*>(true,nullptr);
 721     if (!postTemplate.first)
 722         postTemplate.second = "postTemplate.html";
 723
 724     string fname(postTemplate.second);
 725     ifstream infile(XMLToolingConfig::getConfig().getPathResolver()->resolve(fname, PathResolver::XMLTOOLING_CFG_FILE).c_str());
 726     if (!infile)
 727         throw ConfigurationException("Unable to access HTML template ($1).", params(1, fname.c_str()));
 728     TemplateParameters respParam;
 729     respParam.m_map["action"] = url;
 730
 731     // Load the parameters into objects for the template.
 732     multimap<string,string>& collection = respParam.m_collectionMap["PostedData"];
 733     DDF param = postData.first();
 734     while (!param.isnull()) {
 735         collection.insert(pair<const string,string>(param.name(), (param.string() ? param.string() : "")));
 736         param = postData.next();
 737     }
 738
 739     stringstream str;
 740     XMLToolingConfig::getConfig().getTemplateEngine()->run(infile, str, respParam);
 741
 742     pair<bool,bool> postExpire = props ? props->getBool("postExpire") : make_pair(false,false);
 743
 744     httpResponse.setContentType("text/html");
 745     if (!postExpire.first || postExpire.second) {
 746         httpResponse.setResponseHeader("Expires", "Wed, 01 Jan 1997 12:00:00 GMT");
 747         httpResponse.setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private, max-age=0");
 748         httpResponse.setResponseHeader("Pragma", "no-cache");
 749     }
 750     return httpResponse.sendResponse(str);
 751 }
 752
 753 pair<string,const char*> AbstractHandler::getPostCookieNameProps(const Application& app, const char* relayState) const
 754 {
 755     // Decorates the name of the cookie with the relay state key, if any.
 756     // Doing so gives a better assurance that the recovered data really
 757     // belongs to the relayed request.
 758     pair<string,const char*> shib_cookie=app.getCookieNameProps("_shibpost_");
 759     if (strstr(relayState, "cookie:") == relayState) {
 760         shib_cookie.first = string("_shibpost_") + (relayState + 7);
 761     }
 762     else if (strstr(relayState, "ss:") == relayState) {
 763         const char* pch = strchr(relayState + 3, ':');
 764         if (pch)
 765             shib_cookie.first = string("_shibpost_") + (pch + 1);
 766     }
 767     return shib_cookie;
 768 }
 769
 770 DDF AbstractHandler::getPostData(const Application& application, const HTTPRequest& request) const
 771 {
 772     string contentType = request.getContentType();
 773     if (contentType.find("application/x-www-form-urlencoded") != string::npos) {
 774         const PropertySet* props = application.getPropertySet("Sessions");
 775         pair<bool,unsigned int> plimit = props ? props->getUnsignedInt("postLimit") : pair<bool,unsigned int>(false,0);
 776         if (!plimit.first)
 777             plimit.second = 1024 * 1024;
 778         if (plimit.second == 0 || request.getContentLength() <= plimit.second) {
 779             CGIParser cgi(request);
 780             pair<CGIParser::walker,CGIParser::walker> params = cgi.getParameters(nullptr);
 781             if (params.first == params.second)
 782                 return DDF("parameters").list();
 783             DDF child;
 784             DDF ret = DDF("parameters").list();
 785             for (; params.first != params.second; ++params.first) {
 786                 if (!params.first->first.empty()) {
 787                     child = DDF(params.first->first.c_str()).unsafe_string(params.first->second);
 788                     ret.add(child);
 789                 }
 790             }
 791             return ret;
 792         }
 793         else {
 794             m_log.warn("POST limit exceeded, ignoring %d bytes of posted data", request.getContentLength());
 795         }
 796     }
 797     else {
 798         m_log.info("ignoring POST data with non-standard encoding (%s)", contentType.c_str());
 799     }
 800     return DDF();
 801 }
 802
 803 pair<bool,bool> AbstractHandler::getBool(const char* name, const SPRequest& request, unsigned int type) const
 804 {
 805     if (type & HANDLER_PROPERTY_REQUEST) {
 806         const char* param = request.getParameter(name);
 807         if (param && *param)
 808             return make_pair(true, (*param=='t' || *param=='1'));
 809     }
 810
 811     if (type & HANDLER_PROPERTY_MAP) {
 812         pair<bool,bool> ret = request.getRequestSettings().first->getBool(name);
 813         if (ret.first)
 814             return ret;
 815     }
 816
 817     if (type & HANDLER_PROPERTY_FIXED) {
 818         return getBool(name);
 819     }
 820
 821     return make_pair(false,false);
 822 }
 823
 824 pair<bool,const char*> AbstractHandler::getString(const char* name, const SPRequest& request, unsigned int type) const
 825 {
 826     if (type & HANDLER_PROPERTY_REQUEST) {
 827         const char* param = request.getParameter(name);
 828         if (param && *param)
 829             return make_pair(true, param);
 830     }
 831
 832     if (type & HANDLER_PROPERTY_MAP) {
 833         pair<bool,const char*> ret = request.getRequestSettings().first->getString(name);
 834         if (ret.first)
 835             return ret;
 836     }
 837
 838     if (type & HANDLER_PROPERTY_FIXED) {
 839         return getString(name);
 840     }
 841
 842     return pair<bool,const char*>(false,nullptr);
 843 }
 844
 845 pair<bool,unsigned int> AbstractHandler::getUnsignedInt(const char* name, const SPRequest& request, unsigned int type) const
 846 {
 847     if (type & HANDLER_PROPERTY_REQUEST) {
 848         const char* param = request.getParameter(name);
 849         if (param && *param) {
 850             try {
 851                 return pair<bool,unsigned int>(true, lexical_cast<unsigned int>(param));
 852             }
 853             catch (bad_lexical_cast&) {
 854                 return pair<bool,unsigned int>(false,0);
 855             }
 856         }
 857     }
 858
 859     if (type & HANDLER_PROPERTY_MAP) {
 860         pair<bool,unsigned int> ret = request.getRequestSettings().first->getUnsignedInt(name);
 861         if (ret.first)
 862             return ret;
 863     }
 864
 865     if (type & HANDLER_PROPERTY_FIXED) {
 866         return getUnsignedInt(name);
 867     }
 868
 869     return pair<bool,unsigned int>(false,0);
 870 }
 871
 872 pair<bool,int> AbstractHandler::getInt(const char* name, const SPRequest& request, unsigned int type) const
 873 {
 874     if (type & HANDLER_PROPERTY_REQUEST) {
 875         const char* param = request.getParameter(name);
 876         if (param && *param)
 877             return pair<bool,int>(true, atoi(param));
 878     }
 879
 880     if (type & HANDLER_PROPERTY_MAP) {
 881         pair<bool,int> ret = request.getRequestSettings().first->getInt(name);
 882         if (ret.first)
 883             return ret;
 884     }
 885
 886     if (type & HANDLER_PROPERTY_FIXED) {
 887         return getInt(name);
 888     }
 889
 890     return pair<bool,int>(false,0);
 891 }