shibsp/handler/impl/MetadataGenerator.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  * MetadataGenerator.cpp
  23  *
  24  * Handler for generating "approximate" metadata based on SP configuration.
  25  */
  26
  27 #include "internal.h"
  28 #include "Application.h"
  29 #include "exceptions.h"
  30 #include "ServiceProvider.h"
  31 #include "SPRequest.h"
  32 #include "handler/AbstractHandler.h"
  33 #include "handler/RemotedHandler.h"
  34 #include "util/IPRange.h"
  35
  36 #ifndef SHIBSP_LITE
  37 # include "attribute/resolver/AttributeExtractor.h"
  38 # include "metadata/MetadataProviderCriteria.h"
  39 # include <saml/exceptions.h>
  40 # include <saml/SAMLConfig.h>
  41 # include <saml/signature/ContentReference.h>
  42 # include <saml/saml2/metadata/Metadata.h>
  43 # include <saml/saml2/metadata/MetadataProvider.h>
  44 # include <xmltooling/XMLToolingConfig.h>
  45 # include <xmltooling/security/Credential.h>
  46 # include <xmltooling/security/CredentialCriteria.h>
  47 # include <xmltooling/security/SecurityHelper.h>
  48 # include <xmltooling/signature/Signature.h>
  49 # include <xmltooling/util/ParserPool.h>
  50 # include <xmltooling/util/PathResolver.h>
  51 # include <xercesc/framework/LocalFileInputSource.hpp>
  52 # include <xercesc/framework/Wrapper4InputSource.hpp>
  53 #endif
  54
  55
  56 using namespace shibsp;
  57 #ifndef SHIBSP_LITE
  58 using namespace opensaml::saml2md;
  59 using namespace opensaml;
  60 using namespace xmlsignature;
  61 #endif
  62 using namespace xmltooling;
  63 using namespace std;
  64
  65 namespace shibsp {
  66
  67 #if defined (_MSC_VER)
  68     #pragma warning( push )
  69     #pragma warning( disable : 4250 )
  70 #endif
  71
  72     class SHIBSP_DLLLOCAL Blocker : public DOMNodeFilter
  73     {
  74     public:
  75 #ifdef SHIBSP_XERCESC_SHORT_ACCEPTNODE
  76         short
  77 #else
  78         FilterAction
  79 #endif
  80         acceptNode(const DOMNode* node) const {
  81             return FILTER_REJECT;
  82         }
  83     };
  84
  85     static SHIBSP_DLLLOCAL Blocker g_Blocker;
  86
  87     class SHIBSP_API MetadataGenerator : public AbstractHandler, public RemotedHandler
  88     {
  89     public:
  90         MetadataGenerator(const DOMElement* e, const char* appId);
  91         virtual ~MetadataGenerator() {
  92 #ifndef SHIBSP_LITE
  93             delete m_uiinfo;
  94             delete m_org;
  95             delete m_entityAttrs;
  96             for_each(m_contacts.begin(), m_contacts.end(), xmltooling::cleanup<ContactPerson>());
  97             for_each(m_formats.begin(), m_formats.end(), xmltooling::cleanup<NameIDFormat>());
  98             for_each(m_reqAttrs.begin(), m_reqAttrs.end(), xmltooling::cleanup<RequestedAttribute>());
  99             for_each(m_attrConsumers.begin(), m_attrConsumers.end(), xmltooling::cleanup<AttributeConsumingService>());
 100 #endif
 101         }
 102
 103         pair<bool,long> run(SPRequest& request, bool isHandler=true) const;
 104         void receive(DDF& in, ostream& out);
 105
 106     private:
 107         pair<bool,long> processMessage(
 108             const Application& application,
 109             const char* handlerURL,
 110             const char* entityID,
 111             HTTPResponse& httpResponse
 112             ) const;
 113
 114         vector<IPRange> m_acl;
 115 #ifndef SHIBSP_LITE
 116         string m_salt;
 117         short m_http,m_https;
 118         vector<string> m_bases;
 119         UIInfo* m_uiinfo;
 120         Organization* m_org;
 121         EntityAttributes* m_entityAttrs;
 122         vector<ContactPerson*> m_contacts;
 123         vector<NameIDFormat*> m_formats;
 124         vector<RequestedAttribute*> m_reqAttrs;
 125         vector<AttributeConsumingService*> m_attrConsumers;
 126 #endif
 127     };
 128
 129 #if defined (_MSC_VER)
 130     #pragma warning( pop )
 131 #endif
 132
 133     Handler* SHIBSP_DLLLOCAL MetadataGeneratorFactory(const pair<const DOMElement*,const char*>& p)
 134     {
 135         return new MetadataGenerator(p.first, p.second);
 136     }
 137
 138 };
 139
 140 MetadataGenerator::MetadataGenerator(const DOMElement* e, const char* appId)
 141     : AbstractHandler(e, Category::getInstance(SHIBSP_LOGCAT".MetadataGenerator"), &g_Blocker)
 142 #ifndef SHIBSP_LITE
 143         ,m_http(0), m_https(0), m_uiinfo(nullptr), m_org(nullptr), m_entityAttrs(nullptr)
 144 #endif
 145 {
 146     string address(appId);
 147     address += getString("Location").second;
 148     setAddress(address.c_str());
 149
 150     if (SPConfig::getConfig().isEnabled(SPConfig::InProcess)) {
 151         pair<bool,const char*> acl = getString("acl");
 152         if (acl.first) {
 153             string aclbuf=acl.second;
 154             int j = 0;
 155             for (unsigned int i=0;  i < aclbuf.length();  ++i) {
 156                 if (aclbuf.at(i)==' ') {
 157                     try {
 158                         m_acl.push_back(IPRange::parseCIDRBlock(aclbuf.substr(j, i-j).c_str()));
 159                     }
 160                     catch (exception& ex) {
 161                         m_log.error("invalid CIDR block (%s): %s", aclbuf.substr(j, i-j).c_str(), ex.what());
 162                     }
 163                     j = i + 1;
 164                 }
 165             }
 166             try {
 167                 m_acl.push_back(IPRange::parseCIDRBlock(aclbuf.substr(j, aclbuf.length()-j).c_str()));
 168             }
 169             catch (exception& ex) {
 170                 m_log.error("invalid CIDR block (%s): %s", aclbuf.substr(j, aclbuf.length()-j).c_str(), ex.what());
 171             }
 172
 173             if (m_acl.empty()) {
 174                 m_log.warn("invalid CIDR range(s) in Metadata Generator acl property, allowing 127.0.0.1 as a fall back");
 175                 m_acl.push_back(IPRange::parseCIDRBlock("127.0.0.1"));
 176             }
 177         }
 178     }
 179
 180 #ifndef SHIBSP_LITE
 181     static XMLCh EndpointBase[] = UNICODE_LITERAL_12(E,n,d,p,o,i,n,t,B,a,s,e);
 182
 183     pair<bool,const char*> salt = getString("salt");
 184     if (salt.first)
 185         m_salt = salt.second;
 186
 187     pair<bool,bool> flag = getBool("http");
 188     if (flag.first)
 189         m_http = flag.second ? 1 : -1;
 190     flag = getBool("https");
 191     if (flag.first)
 192         m_https = flag.second ? 1 : -1;
 193
 194     e = XMLHelper::getFirstChildElement(e);
 195     while (e) {
 196         if (XMLString::equals(e->getLocalName(), EndpointBase) && e->hasChildNodes()) {
 197             auto_ptr_char base(e->getFirstChild()->getNodeValue());
 198             if (base.get() && *base.get())
 199                 m_bases.push_back(base.get());
 200         }
 201         else {
 202             // Try and parse the object.
 203             auto_ptr<XMLObject> child(XMLObjectBuilder::buildOneFromElement(const_cast<DOMElement*>(e)));
 204             ContactPerson* cp = dynamic_cast<ContactPerson*>(child.get());
 205             if (cp) {
 206                 child.release();
 207                 m_contacts.push_back(cp);
 208             }
 209             else {
 210                 NameIDFormat* nif = dynamic_cast<NameIDFormat*>(child.get());
 211                 if (nif) {
 212                     child.release();
 213                     m_formats.push_back(nif);
 214                 }
 215                 else {
 216                     RequestedAttribute* req = dynamic_cast<RequestedAttribute*>(child.get());
 217                     if (req) {
 218                         child.release();
 219                         m_reqAttrs.push_back(req);
 220                     }
 221                     else {
 222                         AttributeConsumingService* acs = dynamic_cast<AttributeConsumingService*>(child.get());
 223                         if (acs) {
 224                             child.release();
 225                             m_attrConsumers.push_back(acs);
 226                         }
 227                         else {
 228                             UIInfo* info = dynamic_cast<UIInfo*>(child.get());
 229                             if (info) {
 230                                 if (!m_uiinfo) {
 231                                     child.release();
 232                                     m_uiinfo = info;
 233                                 }
 234                                 else {
 235                                     m_log.warn("skipping duplicate UIInfo element");
 236                                 }
 237                             }
 238                             else {
 239                                 Organization* org = dynamic_cast<Organization*>(child.get());
 240                                 if (org) {
 241                                     if (!m_org) {
 242                                         child.release();
 243                                         m_org = org;
 244                                     }
 245                                     else {
 246                                         m_log.warn("skipping duplicate Organization element");
 247                                     }
 248                                 }
 249                                 else {
 250                                     EntityAttributes* ea = dynamic_cast<EntityAttributes*>(child.get());
 251                                     if (ea) {
 252                                         if (!m_entityAttrs) {
 253                                             child.release();
 254                                             m_entityAttrs = ea;
 255                                         }
 256                                         else {
 257                                             m_log.warn("skipping duplicate EntityAttributes element");
 258                                         }
 259                                     }
 260                                 }
 261                             }
 262                         }
 263                     }
 264                 }
 265             }
 266         }
 267         e = XMLHelper::getNextSiblingElement(e);
 268     }
 269 #endif
 270 }
 271
 272 pair<bool,long> MetadataGenerator::run(SPRequest& request, bool isHandler) const
 273 {
 274     SPConfig& conf = SPConfig::getConfig();
 275     if (conf.isEnabled(SPConfig::InProcess) && !m_acl.empty()) {
 276         bool found = false;
 277         for (vector<IPRange>::const_iterator acl = m_acl.begin(); !found && acl != m_acl.end(); ++acl) {
 278             found = acl->contains(request.getRemoteAddr().c_str());
 279         }
 280         if (!found) {
 281             m_log.error("request for metadata blocked from invalid address (%s)", request.getRemoteAddr().c_str());
 282             istringstream msg("Metadata Request Blocked");
 283             return make_pair(true,request.sendResponse(msg, HTTPResponse::XMLTOOLING_HTTP_STATUS_FORBIDDEN));
 284         }
 285     }
 286
 287     try {
 288         if (conf.isEnabled(SPConfig::OutOfProcess)) {
 289             // When out of process, we run natively and directly process the message.
 290             return processMessage(request.getApplication(), request.getHandlerURL(), request.getParameter("entityID"), request);
 291         }
 292         else {
 293             // When not out of process, we remote all the message processing.
 294             DDF out,in = DDF(m_address.c_str());
 295             in.addmember("application_id").string(request.getApplication().getId());
 296             in.addmember("handler_url").string(request.getHandlerURL());
 297             if (request.getParameter("entityID"))
 298                 in.addmember("entity_id").string(request.getParameter("entityID"));
 299             DDFJanitor jin(in), jout(out);
 300
 301             out=request.getServiceProvider().getListenerService()->send(in);
 302             return unwrap(request, out);
 303         }
 304     }
 305     catch (exception& ex) {
 306         m_log.error("error while processing request: %s", ex.what());
 307         istringstream msg("Metadata Request Failed");
 308         return make_pair(true,request.sendResponse(msg, HTTPResponse::XMLTOOLING_HTTP_STATUS_ERROR));
 309     }
 310 }
 311
 312 void MetadataGenerator::receive(DDF& in, ostream& out)
 313 {
 314     // Find application.
 315     const char* aid=in["application_id"].string();
 316     const char* hurl=in["handler_url"].string();
 317     const Application* app=aid ? SPConfig::getConfig().getServiceProvider()->getApplication(aid) : nullptr;
 318     if (!app) {
 319         // Something's horribly wrong.
 320         m_log.error("couldn't find application (%s) for metadata request", aid ? aid : "(missing)");
 321         throw ConfigurationException("Unable to locate application for metadata request, deleted?");
 322     }
 323     else if (!hurl) {
 324         throw ConfigurationException("Missing handler_url parameter in remoted method call.");
 325     }
 326
 327     // Wrap a response shim.
 328     DDF ret(nullptr);
 329     DDFJanitor jout(ret);
 330     auto_ptr<HTTPResponse> resp(getResponse(ret));
 331
 332     // Since we're remoted, the result should either be a throw, a false/0 return,
 333     // which we just return as an empty structure, or a response/redirect,
 334     // which we capture in the facade and send back.
 335     processMessage(*app, hurl, in["entity_id"].string(), *resp.get());
 336     out << ret;
 337 }
 338
 339 pair<bool,long> MetadataGenerator::processMessage(
 340     const Application& application, const char* handlerURL, const char* entityID, HTTPResponse& httpResponse
 341     ) const
 342 {
 343 #ifndef SHIBSP_LITE
 344     m_log.debug("processing metadata request");
 345
 346     const PropertySet* relyingParty=nullptr;
 347     if (entityID) {
 348         MetadataProvider* m=application.getMetadataProvider();
 349         Locker locker(m);
 350         MetadataProviderCriteria mc(application, entityID);
 351         relyingParty = application.getRelyingParty(m->getEntityDescriptor(mc).first);
 352     }
 353     else {
 354         relyingParty = &application;
 355     }
 356
 357     EntityDescriptor* entity;
 358     pair<bool,const char*> prop = getString("template");
 359     if (prop.first) {
 360         // Load a template to use for our metadata.
 361         string templ(prop.second);
 362         XMLToolingConfig::getConfig().getPathResolver()->resolve(templ, PathResolver::XMLTOOLING_CFG_FILE);
 363         auto_ptr_XMLCh widenit(templ.c_str());
 364         LocalFileInputSource src(widenit.get());
 365         Wrapper4InputSource dsrc(&src,false);
 366         DOMDocument* doc=XMLToolingConfig::getConfig().getParser().parse(dsrc);
 367         XercesJanitor<DOMDocument> docjan(doc);
 368         auto_ptr<XMLObject> xmlobj(XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true));
 369         docjan.release();
 370         entity = dynamic_cast<EntityDescriptor*>(xmlobj.get());
 371         if (!entity)
 372             throw ConfigurationException("Template file ($1) did not contain an EntityDescriptor", params(1, templ.c_str()));
 373         xmlobj.release();
 374     }
 375     else {
 376         entity = EntityDescriptorBuilder::buildEntityDescriptor();
 377     }
 378
 379     if (!entity->getID()) {
 380         string hashinput = m_salt + relyingParty->getString("entityID").second;
 381         string hashed = '_' + SecurityHelper::doHash("SHA1", hashinput.c_str(), hashinput.length());
 382         auto_ptr_XMLCh widenit(hashed.c_str());
 383         entity->setID(widenit.get());
 384     }
 385
 386     auto_ptr<EntityDescriptor> wrapper(entity);
 387     pair<bool,unsigned int> cache = getUnsignedInt("cacheDuration");
 388     if (cache.first) {
 389         entity->setCacheDuration(cache.second);
 390     }
 391     cache = getUnsignedInt("validUntil");
 392     if (cache.first)
 393         entity->setValidUntil(time(nullptr) + cache.second);
 394     entity->setEntityID(relyingParty->getXMLString("entityID").second);
 395
 396     if (m_org && !entity->getOrganization())
 397         entity->setOrganization(m_org->cloneOrganization());
 398
 399     for (vector<ContactPerson*>::const_iterator cp = m_contacts.begin(); cp != m_contacts.end(); ++cp)
 400         entity->getContactPersons().push_back((*cp)->cloneContactPerson());
 401
 402     if (m_entityAttrs) {
 403         if (!entity->getExtensions())
 404             entity->setExtensions(ExtensionsBuilder::buildExtensions());
 405         entity->getExtensions()->getUnknownXMLObjects().push_back(m_entityAttrs->cloneEntityAttributes());
 406     }
 407
 408     SPSSODescriptor* role;
 409     if (entity->getSPSSODescriptors().empty()) {
 410         role = SPSSODescriptorBuilder::buildSPSSODescriptor();
 411         entity->getSPSSODescriptors().push_back(role);
 412     }
 413     else {
 414         role = entity->getSPSSODescriptors().front();
 415     }
 416
 417     for (vector<NameIDFormat*>::const_iterator nif = m_formats.begin(); nif != m_formats.end(); ++nif)
 418         role->getNameIDFormats().push_back((*nif)->cloneNameIDFormat());
 419
 420     if (m_uiinfo) {
 421         if (!role->getExtensions())
 422             role->setExtensions(ExtensionsBuilder::buildExtensions());
 423         role->getExtensions()->getUnknownXMLObjects().push_back(m_uiinfo->cloneUIInfo());
 424     }
 425
 426     for (vector<AttributeConsumingService*>::const_iterator acs = m_attrConsumers.begin(); acs != m_attrConsumers.end(); ++acs)
 427         role->getAttributeConsumingServices().push_back((*acs)->cloneAttributeConsumingService());
 428
 429     if (!m_reqAttrs.empty()) {
 430         int index = 1;
 431         const vector<AttributeConsumingService*>& svcs = const_cast<const SPSSODescriptor*>(role)->getAttributeConsumingServices();
 432         for (vector<AttributeConsumingService*>::const_iterator s =svcs.begin(); s != svcs.end(); ++s) {
 433             pair<bool,int> i = (*s)->getIndex();
 434             if (i.first && index == i.second)
 435                 index = i.second + 1;
 436         }
 437         AttributeConsumingService* svc = AttributeConsumingServiceBuilder::buildAttributeConsumingService();
 438         role->getAttributeConsumingServices().push_back(svc);
 439         svc->setIndex(index);
 440         ServiceName* sn = ServiceNameBuilder::buildServiceName();
 441         svc->getServiceNames().push_back(sn);
 442         sn->setName(entity->getEntityID());
 443         static const XMLCh english[] = UNICODE_LITERAL_2(e,n);
 444         sn->setLang(english);
 445         for (vector<RequestedAttribute*>::const_iterator req = m_reqAttrs.begin(); req != m_reqAttrs.end(); ++req)
 446             svc->getRequestedAttributes().push_back((*req)->cloneRequestedAttribute());
 447     }
 448
 449     // Policy flags.
 450     prop = relyingParty->getString("signing");
 451     if (prop.first && (!strcmp(prop.second,"true") || !strcmp(prop.second,"front")))
 452         role->AuthnRequestsSigned(true);
 453     pair<bool,bool> flagprop = relyingParty->getBool("requireSignedAssertions");
 454     if (flagprop.first && flagprop.second)
 455         role->WantAssertionsSigned(true);
 456
 457     // Ask each handler to generate itself.
 458     vector<const Handler*> handlers;
 459     application.getHandlers(handlers);
 460     for (vector<const Handler*>::const_iterator h = handlers.begin(); h != handlers.end(); ++h) {
 461         if (m_bases.empty()) {
 462             if (strncmp(handlerURL, "https", 5) == 0) {
 463                 if (m_https >= 0)
 464                     (*h)->generateMetadata(*role, handlerURL);
 465                 if (m_http == 1) {
 466                     string temp(handlerURL);
 467                     temp.erase(4, 1);
 468                     (*h)->generateMetadata(*role, temp.c_str());
 469                 }
 470             }
 471             else {
 472                 if (m_http >= 0)
 473                     (*h)->generateMetadata(*role, handlerURL);
 474                 if (m_https == 1) {
 475                     string temp(handlerURL);
 476                     temp.insert(temp.begin() + 4, 's');
 477                     (*h)->generateMetadata(*role, temp.c_str());
 478                 }
 479             }
 480         }
 481         else {
 482             for (vector<string>::const_iterator b = m_bases.begin(); b != m_bases.end(); ++b)
 483                 (*h)->generateMetadata(*role, b->c_str());
 484         }
 485     }
 486
 487     AttributeExtractor* extractor = application.getAttributeExtractor();
 488     if (extractor) {
 489         Locker extlocker(extractor);
 490         extractor->generateMetadata(*role);
 491     }
 492
 493     CredentialResolver* credResolver=application.getCredentialResolver();
 494     if (credResolver) {
 495         Locker credLocker(credResolver);
 496         CredentialCriteria cc;
 497         prop = relyingParty->getString("keyName");
 498         if (prop.first)
 499             cc.getKeyNames().insert(prop.second);
 500         vector<const Credential*> signingcreds,enccreds;
 501         cc.setUsage(Credential::SIGNING_CREDENTIAL);
 502         credResolver->resolve(signingcreds, &cc);
 503         cc.setUsage(Credential::ENCRYPTION_CREDENTIAL);
 504         credResolver->resolve(enccreds, &cc);
 505
 506         for (vector<const Credential*>::const_iterator c = signingcreds.begin(); c != signingcreds.end(); ++c) {
 507             KeyInfo* kinfo = (*c)->getKeyInfo();
 508             if (kinfo) {
 509                 KeyDescriptor* kd = KeyDescriptorBuilder::buildKeyDescriptor();
 510                 kd->setKeyInfo(kinfo);
 511                 const XMLCh* use = KeyDescriptor::KEYTYPE_SIGNING;
 512                 for (vector<const Credential*>::iterator match = enccreds.begin(); match != enccreds.end(); ++match) {
 513                     if (*match == *c) {
 514                         use = nullptr;
 515                         enccreds.erase(match);
 516                         break;
 517                     }
 518                 }
 519                 kd->setUse(use);
 520                 role->getKeyDescriptors().push_back(kd);
 521             }
 522         }
 523
 524         for (vector<const Credential*>::const_iterator c = enccreds.begin(); c != enccreds.end(); ++c) {
 525             KeyInfo* kinfo = (*c)->getKeyInfo();
 526             if (kinfo) {
 527                 KeyDescriptor* kd = KeyDescriptorBuilder::buildKeyDescriptor();
 528                 kd->setUse(KeyDescriptor::KEYTYPE_ENCRYPTION);
 529                 kd->setKeyInfo(kinfo);
 530                 role->getKeyDescriptors().push_back(kd);
 531             }
 532         }
 533     }
 534
 535     // Stream for response.
 536     stringstream s;
 537
 538     // Self-sign it?
 539     pair<bool,bool> flag = getBool("signing");
 540     if (flag.first && flag.second) {
 541         if (credResolver) {
 542             Locker credLocker(credResolver);
 543             // Fill in criteria to use.
 544             CredentialCriteria cc;
 545             cc.setUsage(Credential::SIGNING_CREDENTIAL);
 546             prop = getString("keyName");
 547             if (prop.first)
 548                 cc.getKeyNames().insert(prop.second);
 549             pair<bool,const XMLCh*> sigalg = getXMLString("signingAlg");
 550             pair<bool,const XMLCh*> digalg = getXMLString("digestAlg");
 551             if (sigalg.first)
 552                 cc.setXMLAlgorithm(sigalg.second);
 553             const Credential* cred = credResolver->resolve(&cc);
 554             if (!cred)
 555                 throw XMLSecurityException("Unable to obtain signing credential to use.");
 556
 557             // Pretty-print it first and then read it back in.
 558             stringstream pretty;
 559             XMLHelper::serialize(entity->marshall(), pretty, true);
 560             DOMDocument* prettydoc = XMLToolingConfig::getConfig().getParser().parse(pretty);
 561             auto_ptr<XMLObject> prettyentity(XMLObjectBuilder::buildOneFromElement(prettydoc->getDocumentElement(), true));
 562
 563             Signature* sig = SignatureBuilder::buildSignature();
 564             dynamic_cast<EntityDescriptor*>(prettyentity.get())->setSignature(sig);
 565             if (sigalg.first)
 566                 sig->setSignatureAlgorithm(sigalg.second);
 567             if (digalg.first) {
 568                 opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
 569                 if (cr)
 570                     cr->setDigestAlgorithm(digalg.second);
 571             }
 572
 573             // Sign while marshalling.
 574             vector<Signature*> sigs(1,sig);
 575             prettyentity->marshall(prettydoc,&sigs,cred);
 576             s << *prettyentity;
 577         }
 578         else {
 579             throw FatalProfileException("Can't self-sign metadata, no credential resolver found.");
 580         }
 581     }
 582     else {
 583         // Pretty-print it directly to client.
 584         XMLHelper::serialize(entity->marshall(), s, true);
 585     }
 586
 587     prop = getString("mimeType");
 588     httpResponse.setContentType(prop.first ? prop.second : "application/samlmetadata+xml");
 589     return make_pair(true, httpResponse.sendResponse(s));
 590 #else
 591     return make_pair(false,0L);
 592 #endif
 593 }