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 && relayState.find("ss:") != 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("cookie:") != 0 && 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
 310 void Handler::recoverRelayState(
 311     const Application& application, const HTTPRequest& request, HTTPResponse& response, string& relayState, bool clear
 312     ) const
 313 {
 314     SPConfig& conf = SPConfig::getConfig();
 315
 316     // Look for StorageService-backed state of the form "ss:SSID:key".
 317     const char* state = relayState.c_str();
 318     if (strstr(state,"ss:") == state) {
 319         state += 3;
 320         const char* key = strchr(state,':');
 321         if (key) {
 322             string ssid = relayState.substr(3, key - state);
 323             key++;
 324             if (!ssid.empty() && *key) {
 325                 if (conf.isEnabled(SPConfig::OutOfProcess)) {
 326 #ifndef SHIBSP_LITE
 327                     StorageService* storage = conf.getServiceProvider()->getStorageService(ssid.c_str());
 328                     if (storage) {
 329                         ssid = key;
 330                         if (storage->readString("RelayState",ssid.c_str(),&relayState) > 0) {
 331                             if (clear)
 332                                 storage->deleteString("RelayState",ssid.c_str());
 333                             request.absolutize(relayState);
 334                             return;
 335                         }
 336                         else if (storage->readText("RelayState",ssid.c_str(),&relayState) > 0) {
 337                             if (clear)
 338                                 storage->deleteText("RelayState",ssid.c_str());
 339                             request.absolutize(relayState);
 340                             return;
 341                         }
 342                         else {
 343                             relayState.erase();
 344                         }
 345                     }
 346                     else {
 347                         string msg("Storage-backed RelayState with invalid StorageService ID (");
 348                         msg += ssid + ')';
 349                         log(SPRequest::SPError, msg);
 350                         relayState.erase();
 351                     }
 352 #endif
 353                 }
 354                 else if (conf.isEnabled(SPConfig::InProcess)) {
 355                     DDF out,in = DDF("get::RelayState").structure();
 356                     in.addmember("id").string(ssid.c_str());
 357                     in.addmember("key").string(key);
 358                     in.addmember("clear").integer(clear ? 1 : 0);
 359                     DDFJanitor jin(in),jout(out);
 360                     out = application.getServiceProvider().getListenerService()->send(in);
 361                     if (!out.isstring()) {
 362                         log(SPRequest::SPError, "StorageService-backed RelayState mechanism did not return a state value.");
 363                         relayState.erase();
 364                     }
 365                     else {
 366                         relayState = out.string();
 367                         request.absolutize(relayState);
 368                         return;
 369                     }
 370                 }
 371             }
 372         }
 373     }
 374
 375     // Look for cookie-backed state of the form "cookie:timestamp_key".
 376     state = relayState.c_str();
 377     if (strstr(state,"cookie:") == state) {
 378         state += 7;
 379         if (*state) {
 380             // Pull the value from the "relay state" cookie.
 381             pair<string,const char*> relay_cookie = application.getCookieNameProps("_shibstate_");
 382             relay_cookie.first = string("_shibstate_") + state;
 383             state = request.getCookie(relay_cookie.first.c_str());
 384             if (state && *state) {
 385                 // URL-decode the value.
 386                 char* rscopy = strdup(state);
 387                 XMLToolingConfig::getConfig().getURLEncoder()->decode(rscopy);
 388                 relayState = rscopy;
 389                 free(rscopy);
 390                 if (clear) {
 391                     string exp(relay_cookie.second);
 392                     exp += "; expires=Mon, 01 Jan 2001 00:00:00 GMT";
 393                     response.setCookie(relay_cookie.first.c_str(), exp.c_str());
 394                 }
 395                 request.absolutize(relayState);
 396                 return;
 397             }
 398         }
 399
 400         relayState.erase();
 401     }
 402
 403     // Check for "default" value (or the old "cookie" value that might come from stale bookmarks).
 404     if (relayState.empty() || relayState == "default" || relayState == "cookie") {
 405         pair<bool,const char*> homeURL=application.getString("homeURL");
 406         if (homeURL.first)
 407             relayState = homeURL.second;
 408         else
 409             relayState = '/';
 410     }
 411
 412     request.absolutize(relayState);
 413 }
 414
 415 AbstractHandler::AbstractHandler(
 416     const DOMElement* e, Category& log, DOMNodeFilter* filter, const map<string,string>* remapper
 417     ) : m_log(log), m_configNS(shibspconstants::SHIB2SPCONFIG_NS) {
 418     load(e, nullptr, filter, remapper);
 419 }
 420
 421 AbstractHandler::~AbstractHandler()
 422 {
 423 }
 424
 425 void AbstractHandler::log(SPRequest::SPLogLevel level, const string& msg) const
 426 {
 427     m_log.log(
 428         (level == SPRequest::SPDebug ? Priority::DEBUG :
 429         (level == SPRequest::SPInfo ? Priority::INFO :
 430         (level == SPRequest::SPWarn ? Priority::WARN :
 431         (level == SPRequest::SPError ? Priority::ERROR : Priority::CRIT)))),
 432         msg
 433         );
 434 }
 435
 436 #ifndef SHIBSP_LITE
 437
 438 const char* Handler::getType() const
 439 {
 440     return getString("type").second;
 441 }
 442
 443 void AbstractHandler::checkError(const XMLObject* response, const saml2md::RoleDescriptor* role) const
 444 {
 445     const saml2p::StatusResponseType* r2 = dynamic_cast<const saml2p::StatusResponseType*>(response);
 446     if (r2) {
 447         const saml2p::Status* status = r2->getStatus();
 448         if (status) {
 449             const saml2p::StatusCode* sc = status->getStatusCode();
 450             const XMLCh* code = sc ? sc->getValue() : nullptr;
 451             if (code && !XMLString::equals(code,saml2p::StatusCode::SUCCESS)) {
 452                 FatalProfileException ex("SAML response reported an IdP error.");
 453                 annotateException(&ex, role, status);   // throws it
 454             }
 455         }
 456     }
 457
 458     const saml1p::Response* r1 = dynamic_cast<const saml1p::Response*>(response);
 459     if (r1) {
 460         const saml1p::Status* status = r1->getStatus();
 461         if (status) {
 462             const saml1p::StatusCode* sc = status->getStatusCode();
 463             const xmltooling::QName* code = sc ? sc->getValue() : nullptr;
 464             if (code && *code != saml1p::StatusCode::SUCCESS) {
 465                 FatalProfileException ex("SAML response reported an IdP error.");
 466                 annotateException(&ex, role, status);   // throws it
 467             }
 468         }
 469     }
 470 }
 471
 472 void AbstractHandler::fillStatus(saml2p::StatusResponseType& response, const XMLCh* code, const XMLCh* subcode, const char* msg) const
 473 {
 474     saml2p::Status* status = saml2p::StatusBuilder::buildStatus();
 475     saml2p::StatusCode* scode = saml2p::StatusCodeBuilder::buildStatusCode();
 476     status->setStatusCode(scode);
 477     scode->setValue(code);
 478     if (subcode) {
 479         saml2p::StatusCode* ssubcode = saml2p::StatusCodeBuilder::buildStatusCode();
 480         scode->setStatusCode(ssubcode);
 481         ssubcode->setValue(subcode);
 482     }
 483     if (msg) {
 484         pair<bool,bool> flag = getBool("detailedErrors", m_configNS.get());
 485         auto_ptr_XMLCh widemsg((flag.first && flag.second) ? msg : "Error processing request.");
 486         saml2p::StatusMessage* sm = saml2p::StatusMessageBuilder::buildStatusMessage();
 487         status->setStatusMessage(sm);
 488         sm->setMessage(widemsg.get());
 489     }
 490     response.setStatus(status);
 491 }
 492
 493 long AbstractHandler::sendMessage(
 494     const MessageEncoder& encoder,
 495     XMLObject* msg,
 496     const char* relayState,
 497     const char* destination,
 498     const saml2md::RoleDescriptor* role,
 499     const Application& application,
 500     HTTPResponse& httpResponse,
 501     bool signIfPossible
 502     ) const
 503 {
 504     const EntityDescriptor* entity = role ? dynamic_cast<const EntityDescriptor*>(role->getParent()) : nullptr;
 505     const PropertySet* relyingParty = application.getRelyingParty(entity);
 506     pair<bool,const char*> flag = signIfPossible ? make_pair(true,(const char*)"true") : relyingParty->getString("signing");
 507     if (flag.first && (!strcmp(flag.second, "true") ||
 508                         (encoder.isUserAgentPresent() && !strcmp(flag.second, "front")) ||
 509                         (!encoder.isUserAgentPresent() && !strcmp(flag.second, "back")))) {
 510         CredentialResolver* credResolver = application.getCredentialResolver();
 511         if (credResolver) {
 512             Locker credLocker(credResolver);
 513             const Credential* cred = nullptr;
 514             pair<bool,const char*> keyName = relyingParty->getString("keyName");
 515             pair<bool,const XMLCh*> sigalg = relyingParty->getXMLString("signingAlg");
 516             if (role) {
 517                 MetadataCredentialCriteria mcc(*role);
 518                 mcc.setUsage(Credential::SIGNING_CREDENTIAL);
 519                 if (keyName.first)
 520                     mcc.getKeyNames().insert(keyName.second);
 521                 if (sigalg.first) {
 522                     // Using an explicit algorithm, so resolve a credential directly.
 523                     mcc.setXMLAlgorithm(sigalg.second);
 524                     cred = credResolver->resolve(&mcc);
 525                 }
 526                 else {
 527                     // Prefer credential based on peer's requirements.
 528                     pair<const SigningMethod*,const Credential*> p = role->getSigningMethod(*credResolver, mcc);
 529                     if (p.first)
 530                         sigalg = make_pair(true, p.first->getAlgorithm());
 531                     if (p.second)
 532                         cred = p.second;
 533                 }
 534             }
 535             else {
 536                 CredentialCriteria cc;
 537                 cc.setUsage(Credential::SIGNING_CREDENTIAL);
 538                 if (keyName.first)
 539                     cc.getKeyNames().insert(keyName.second);
 540                 if (sigalg.first)
 541                     cc.setXMLAlgorithm(sigalg.second);
 542                 cred = credResolver->resolve(&cc);
 543             }
 544             if (cred) {
 545                 // Signed request.
 546                 pair<bool,const XMLCh*> digalg = relyingParty->getXMLString("digestAlg");
 547                 if (!digalg.first && role) {
 548                     const DigestMethod* dm = role->getDigestMethod();
 549                     if (dm)
 550                         digalg = make_pair(true, dm->getAlgorithm());
 551                 }
 552                 return encoder.encode(
 553                     httpResponse,
 554                     msg,
 555                     destination,
 556                     entity,
 557                     relayState,
 558                     &application,
 559                     cred,
 560                     sigalg.second,
 561                     (digalg.first ? digalg.second : nullptr)
 562                     );
 563             }
 564             else {
 565                 m_log.warn("no signing credential resolved, leaving message unsigned");
 566             }
 567         }
 568         else {
 569             m_log.warn("no credential resolver installed, leaving message unsigned");
 570         }
 571     }
 572
 573     // Unsigned request.
 574     return encoder.encode(httpResponse, msg, destination, entity, relayState, &application);
 575 }
 576
 577 #endif
 578
 579 void AbstractHandler::preservePostData(
 580     const Application& application, const HTTPRequest& request, HTTPResponse& response, const char* relayState
 581     ) const
 582 {
 583 #ifdef HAVE_STRCASECMP
 584     if (strcasecmp(request.getMethod(), "POST")) return;
 585 #else
 586     if (stricmp(request.getMethod(), "POST")) return;
 587 #endif
 588
 589     // No specs mean no save.
 590     const PropertySet* props=application.getPropertySet("Sessions");
 591     pair<bool,const char*> mech = props ? props->getString("postData") : pair<bool,const char*>(false,nullptr);
 592     if (!mech.first) {
 593         m_log.info("postData property not supplied, form data will not be preserved across SSO");
 594         return;
 595     }
 596
 597     DDF postData = getPostData(application, request);
 598     if (postData.isnull())
 599         return;
 600
 601     if (strstr(mech.second,"ss:") == mech.second) {
 602         mech.second+=3;
 603         if (!*mech.second) {
 604             postData.destroy();
 605             throw ConfigurationException("Unsupported postData mechanism ($1).", params(1, mech.second - 3));
 606         }
 607
 608         string postkey;
 609         if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess)) {
 610             DDFJanitor postjan(postData);
 611 #ifndef SHIBSP_LITE
 612             StorageService* storage = application.getServiceProvider().getStorageService(mech.second);
 613             if (storage) {
 614                 // Use a random key
 615                 string rsKey;
 616                 SAMLConfig::getConfig().generateRandomBytes(rsKey, 32);
 617                 rsKey = SAMLArtifact::toHex(rsKey);
 618                 ostringstream out;
 619                 out << postData;
 620                 if (!storage->createText("PostData", rsKey.c_str(), out.str().c_str(), time(nullptr) + 600))
 621                     throw IOException("Attempted to insert duplicate storage key.");
 622                 postkey = string(mech.second-3) + ':' + rsKey;
 623             }
 624             else {
 625                 m_log.error("storage-backed PostData mechanism with invalid StorageService ID (%s)", mech.second);
 626             }
 627 #else
 628             throw ConfigurationException("Lite version of library cannot be used out of process.");
 629 #endif
 630         }
 631         else if (SPConfig::getConfig().isEnabled(SPConfig::InProcess)) {
 632             DDF out,in = DDF("set::PostData").structure();
 633             DDFJanitor jin(in),jout(out);
 634             in.addmember("id").string(mech.second);
 635             in.add(postData);
 636             out = application.getServiceProvider().getListenerService()->send(in);
 637             if (!out.isstring())
 638                 throw IOException("StorageService-backed PostData mechanism did not return a state key.");
 639             postkey = string(mech.second-3) + ':' + out.string();
 640         }
 641
 642         // Set a cookie with key info.
 643         pair<string,const char*> shib_cookie = getPostCookieNameProps(application, relayState);
 644         postkey += shib_cookie.second;
 645         response.setCookie(shib_cookie.first.c_str(), postkey.c_str());
 646     }
 647     else {
 648         postData.destroy();
 649         throw ConfigurationException("Unsupported postData mechanism ($1).", params(1,mech.second));
 650     }
 651 }
 652
 653 DDF AbstractHandler::recoverPostData(
 654     const Application& application, const HTTPRequest& request, HTTPResponse& response, const char* relayState
 655     ) const
 656 {
 657     // First we need the post recovery cookie.
 658     pair<string,const char*> shib_cookie = getPostCookieNameProps(application, relayState);
 659     const char* cookie = request.getCookie(shib_cookie.first.c_str());
 660     if (!cookie || !*cookie)
 661         return DDF();
 662
 663     // Clear the cookie.
 664     string exp(shib_cookie.second);
 665     exp += "; expires=Mon, 01 Jan 2001 00:00:00 GMT";
 666     response.setCookie(shib_cookie.first.c_str(), exp.c_str());
 667
 668     // Look for StorageService-backed state of the form "ss:SSID:key".
 669     const char* state = cookie;
 670     if (strstr(state, "ss:") == state) {
 671         state += 3;
 672         const char* key = strchr(state, ':');
 673         if (key) {
 674             string ssid = string(cookie).substr(3, key - state);
 675             key++;
 676             if (!ssid.empty() && *key) {
 677                 SPConfig& conf = SPConfig::getConfig();
 678                 if (conf.isEnabled(SPConfig::OutOfProcess)) {
 679 #ifndef SHIBSP_LITE
 680                     StorageService* storage = conf.getServiceProvider()->getStorageService(ssid.c_str());
 681                     if (storage) {
 682                         if (storage->readText("PostData", key, &ssid) > 0) {
 683                             storage->deleteText("PostData", key);
 684                             istringstream inret(ssid);
 685                             DDF ret;
 686                             inret >> ret;
 687                             return ret;
 688                         }
 689                         else {
 690                             m_log.error("failed to recover form post data using key (%s)", key);
 691                         }
 692                     }
 693                     else {
 694                         m_log.error("storage-backed PostData with invalid StorageService ID (%s)", ssid.c_str());
 695                     }
 696 #endif
 697                 }
 698                 else if (conf.isEnabled(SPConfig::InProcess)) {
 699                     DDF in = DDF("get::PostData").structure();
 700                     DDFJanitor jin(in);
 701                     in.addmember("id").string(ssid.c_str());
 702                     in.addmember("key").string(key);
 703                     DDF out = application.getServiceProvider().getListenerService()->send(in);
 704                     if (out.islist())
 705                         return out;
 706                     out.destroy();
 707                     m_log.error("storageService-backed PostData mechanism did not return preserved data.");
 708                 }
 709             }
 710         }
 711     }
 712     return DDF();
 713 }
 714
 715 long AbstractHandler::sendPostResponse(
 716     const Application& application, HTTPResponse& httpResponse, const char* url, DDF& postData
 717     ) const
 718 {
 719     HTTPResponse::sanitizeURL(url);
 720
 721     const PropertySet* props=application.getPropertySet("Sessions");
 722     pair<bool,const char*> postTemplate = props ? props->getString("postTemplate") : pair<bool,const char*>(true,nullptr);
 723     if (!postTemplate.first)
 724         postTemplate.second = "postTemplate.html";
 725
 726     string fname(postTemplate.second);
 727     ifstream infile(XMLToolingConfig::getConfig().getPathResolver()->resolve(fname, PathResolver::XMLTOOLING_CFG_FILE).c_str());
 728     if (!infile)
 729         throw ConfigurationException("Unable to access HTML template ($1).", params(1, fname.c_str()));
 730     TemplateParameters respParam;
 731     respParam.m_map["action"] = url;
 732
 733     // Load the parameters into objects for the template.
 734     multimap<string,string>& collection = respParam.m_collectionMap["PostedData"];
 735     DDF param = postData.first();
 736     while (!param.isnull()) {
 737         collection.insert(pair<const string,string>(param.name(), (param.string() ? param.string() : "")));
 738         param = postData.next();
 739     }
 740
 741     stringstream str;
 742     XMLToolingConfig::getConfig().getTemplateEngine()->run(infile, str, respParam);
 743
 744     pair<bool,bool> postExpire = props ? props->getBool("postExpire") : make_pair(false,false);
 745
 746     httpResponse.setContentType("text/html");
 747     if (!postExpire.first || postExpire.second) {
 748         httpResponse.setResponseHeader("Expires", "Wed, 01 Jan 1997 12:00:00 GMT");
 749         httpResponse.setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private, max-age=0");
 750         httpResponse.setResponseHeader("Pragma", "no-cache");
 751     }
 752     return httpResponse.sendResponse(str);
 753 }
 754
 755 pair<string,const char*> AbstractHandler::getPostCookieNameProps(const Application& app, const char* relayState) const
 756 {
 757     // Decorates the name of the cookie with the relay state key, if any.
 758     // Doing so gives a better assurance that the recovered data really
 759     // belongs to the relayed request.
 760     pair<string,const char*> shib_cookie=app.getCookieNameProps("_shibpost_");
 761     if (strstr(relayState, "cookie:") == relayState) {
 762         shib_cookie.first = string("_shibpost_") + (relayState + 7);
 763     }
 764     else if (strstr(relayState, "ss:") == relayState) {
 765         const char* pch = strchr(relayState + 3, ':');
 766         if (pch)
 767             shib_cookie.first = string("_shibpost_") + (pch + 1);
 768     }
 769     return shib_cookie;
 770 }
 771
 772 DDF AbstractHandler::getPostData(const Application& application, const HTTPRequest& request) const
 773 {
 774     string contentType = request.getContentType();
 775     if (contentType.find("application/x-www-form-urlencoded") != string::npos) {
 776         const PropertySet* props = application.getPropertySet("Sessions");
 777         pair<bool,unsigned int> plimit = props ? props->getUnsignedInt("postLimit") : pair<bool,unsigned int>(false,0);
 778         if (!plimit.first)
 779             plimit.second = 1024 * 1024;
 780         if (plimit.second == 0 || request.getContentLength() <= plimit.second) {
 781             CGIParser cgi(request);
 782             pair<CGIParser::walker,CGIParser::walker> params = cgi.getParameters(nullptr);
 783             if (params.first == params.second)
 784                 return DDF("parameters").list();
 785             DDF child;
 786             DDF ret = DDF("parameters").list();
 787             for (; params.first != params.second; ++params.first) {
 788                 if (!params.first->first.empty()) {
 789                     child = DDF(params.first->first.c_str()).unsafe_string(params.first->second);
 790                     ret.add(child);
 791                 }
 792             }
 793             return ret;
 794         }
 795         else {
 796             m_log.warn("POST limit exceeded, ignoring %d bytes of posted data", request.getContentLength());
 797         }
 798     }
 799     else {
 800         m_log.info("ignoring POST data with non-standard encoding (%s)", contentType.c_str());
 801     }
 802     return DDF();
 803 }
 804
 805 pair<bool,bool> AbstractHandler::getBool(const char* name, const SPRequest& request, unsigned int type) const
 806 {
 807     if (type & HANDLER_PROPERTY_REQUEST) {
 808         const char* param = request.getParameter(name);
 809         if (param && *param)
 810             return make_pair(true, (*param=='t' || *param=='1'));
 811     }
 812
 813     if (type & HANDLER_PROPERTY_MAP) {
 814         pair<bool,bool> ret = request.getRequestSettings().first->getBool(name);
 815         if (ret.first)
 816             return ret;
 817     }
 818
 819     if (type & HANDLER_PROPERTY_FIXED) {
 820         return getBool(name);
 821     }
 822
 823     return make_pair(false,false);
 824 }
 825
 826 pair<bool,const char*> AbstractHandler::getString(const char* name, const SPRequest& request, unsigned int type) const
 827 {
 828     if (type & HANDLER_PROPERTY_REQUEST) {
 829         const char* param = request.getParameter(name);
 830         if (param && *param)
 831             return make_pair(true, param);
 832     }
 833
 834     if (type & HANDLER_PROPERTY_MAP) {
 835         pair<bool,const char*> ret = request.getRequestSettings().first->getString(name);
 836         if (ret.first)
 837             return ret;
 838     }
 839
 840     if (type & HANDLER_PROPERTY_FIXED) {
 841         return getString(name);
 842     }
 843
 844     return pair<bool,const char*>(false,nullptr);
 845 }
 846
 847 pair<bool,unsigned int> AbstractHandler::getUnsignedInt(const char* name, const SPRequest& request, unsigned int type) const
 848 {
 849     if (type & HANDLER_PROPERTY_REQUEST) {
 850         const char* param = request.getParameter(name);
 851         if (param && *param) {
 852             try {
 853                 return pair<bool,unsigned int>(true, lexical_cast<unsigned int>(param));
 854             }
 855             catch (bad_lexical_cast&) {
 856                 return pair<bool,unsigned int>(false,0);
 857             }
 858         }
 859     }
 860
 861     if (type & HANDLER_PROPERTY_MAP) {
 862         pair<bool,unsigned int> ret = request.getRequestSettings().first->getUnsignedInt(name);
 863         if (ret.first)
 864             return ret;
 865     }
 866
 867     if (type & HANDLER_PROPERTY_FIXED) {
 868         return getUnsignedInt(name);
 869     }
 870
 871     return pair<bool,unsigned int>(false,0);
 872 }
 873
 874 pair<bool,int> AbstractHandler::getInt(const char* name, const SPRequest& request, unsigned int type) const
 875 {
 876     if (type & HANDLER_PROPERTY_REQUEST) {
 877         const char* param = request.getParameter(name);
 878         if (param && *param)
 879             return pair<bool,int>(true, atoi(param));
 880     }
 881
 882     if (type & HANDLER_PROPERTY_MAP) {
 883         pair<bool,int> ret = request.getRequestSettings().first->getInt(name);
 884         if (ret.first)
 885             return ret;
 886     }
 887
 888     if (type & HANDLER_PROPERTY_FIXED) {
 889         return getInt(name);
 890     }
 891
 892     return pair<bool,int>(false,0);
 893 }