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/**
* Licensed to the University Corporation for Advanced Internet
* Development, Inc. (UCAID) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* UCAID licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the
* License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific
* language governing permissions and limitations under the License.
*/
/**
* DiscoverableMetadataProvider.cpp
*
* A metadata provider that provides a JSON feed of IdP discovery information.
*/
#include "internal.h"
#include "binding/SAMLArtifact.h"
#include "saml2/metadata/EntityMatcher.h"
#include "saml2/metadata/Metadata.h"
#include "saml2/metadata/DiscoverableMetadataProvider.h"
#include <fstream>
#include <sstream>
#include <boost/lambda/bind.hpp>
#include <boost/lambda/casts.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/iterator/indirect_iterator.hpp>
#include <xmltooling/logging.h>
#include <xmltooling/XMLToolingConfig.h>
using namespace opensaml::saml2;
using namespace opensaml::saml2md;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace boost::lambda;
using namespace boost;
using namespace std;
DiscoverableMetadataProvider::DiscoverableMetadataProvider(const DOMElement* e, bool deprecationSupport)
: MetadataProvider(e, deprecationSupport), m_legacyOrgNames(false)
{
static const XMLCh legacyOrgNames[] = UNICODE_LITERAL_14(l,e,g,a,c,y,O,r,g,N,a,m,e,s);
static const XMLCh matcher[] = UNICODE_LITERAL_7(m,a,t,c,h,e,r);
static const XMLCh tagsInFeed[] = UNICODE_LITERAL_10(t,a,g,s,I,n,F,e,e,d);
static const XMLCh _type[] = UNICODE_LITERAL_4(t,y,p,e);
static const XMLCh DiscoveryFilter[] = UNICODE_LITERAL_15(D,i,s,c,o,v,e,r,y,F,i,l,t,e,r);
m_legacyOrgNames = XMLHelper::getAttrBool(e, false, legacyOrgNames);
m_entityAttributes = XMLHelper::getAttrBool(e, false, tagsInFeed);
e = e ? XMLHelper::getFirstChildElement(e, DiscoveryFilter) : nullptr;
while (e) {
string t(XMLHelper::getAttrString(e, nullptr, _type));
if (t == "Include" || t == "Exclude" || t == "Whitelist" || t == "Blacklist") {
string m(XMLHelper::getAttrString(e, nullptr, matcher));
if (!m.empty()) {
if (t == "Whitelist") {
Category::getInstance(SAML_LOGCAT ".MetadataProvider.Discoverable").warn(
"DEPRECATED: DiscoveryFilter type=\"Whitelist\" replaced by type=\"Include\"");
}
else if (t == "Blacklist") {
Category::getInstance(SAML_LOGCAT ".MetadataProvider.Discoverable").warn(
"DEPRECATED: DiscoveryFilter type=\"Blacklist\" replaced by type=\"Exclude\"");
}
try {
boost::shared_ptr<EntityMatcher> temp(SAMLConfig::getConfig().EntityMatcherManager.newPlugin(m, e, deprecationSupport));
m_discoFilters.push_back(make_pair(t == "Include" || t == "Whitelist", temp));
}
catch (const std::exception& ex) {
Category::getInstance(SAML_LOGCAT ".MetadataProvider.Discoverable").error(
"exception creating <DiscoveryFilter> EntityMatcher: %s", ex.what()
);
}
}
else {
Category::getInstance(SAML_LOGCAT ".MetadataProvider.Discoverable").error(
"<DiscoveryFilter> requires matcher attribute");
}
}
else {
Category::getInstance(SAML_LOGCAT ".MetadataProvider.Discoverable").error(
"unknown <DiscoveryFilter> type (%s)", t.empty() ? "none" : t.c_str()
);
}
e = XMLHelper::getNextSiblingElement(e, DiscoveryFilter);
}
}
DiscoverableMetadataProvider::~DiscoverableMetadataProvider()
{
}
void DiscoverableMetadataProvider::generateFeed()
{
m_feed.erase();
bool first = true;
const XMLObject* object = getMetadata();
discoGroup(m_feed, dynamic_cast<const EntitiesDescriptor*>(object), first);
discoEntity(m_feed, dynamic_cast<const EntityDescriptor*>(object), first);
SAMLConfig::getConfig().generateRandomBytes(m_feedTag, 4);
m_feedTag = SAMLArtifact::toHex(m_feedTag);
}
string DiscoverableMetadataProvider::getCacheTag() const
{
return m_feedTag;
}
void DiscoverableMetadataProvider::outputFeed(ostream& os, bool& first, bool wrapArray) const
{
if (wrapArray)
os << '[';
if (!m_feed.empty()) {
if (first)
first = false;
else
os << ",\n";
os << m_feed;
}
if (wrapArray)
os << "\n]";
}
namespace {
static string& json_safe(string& s, const char* buf)
{
for (; *buf; ++buf) {
switch (*buf) {
case '\\':
case '"':
s += '\\';
s += *buf;
break;
case '\b':
s += "\\b";
break;
case '\t':
s += "\\t";
break;
case '\n':
s += "\\n";
break;
case '\f':
s += "\\f";
break;
case '\r':
s += "\\r";
break;
default:
s += *buf;
}
}
return s;
}
};
void DiscoverableMetadataProvider::discoEntity(string& s, const EntityDescriptor* entity, bool& first) const
{
time_t now = time(nullptr);
if (entity && entity->isValid(now)) {
// Check filter(s).
for (vector< pair < bool, boost::shared_ptr<EntityMatcher> > >::const_iterator f = m_discoFilters.begin(); f != m_discoFilters.end(); ++f) {
// The flag is true for an include and false for an exclude,
// so we omit the entity if the match outcome is the inverse.
if (f->first != f->second->matches(*entity))
return;
}
const vector<IDPSSODescriptor*>& idps = entity->getIDPSSODescriptors();
if (!idps.empty()) {
auto_ptr_char entityid(entity->getEntityID());
// Open a struct and output id: entityID.
if (first)
first = false;
else
s += ',';
s += "\n{\n \"entityID\": \"";
json_safe(s, entityid.get());
s += '\"';
bool extFound = false;
bool displayNameFound = false;
for (indirect_iterator<vector<IDPSSODescriptor*>::const_iterator> idp = make_indirect_iterator(idps.begin());
!extFound && idp != make_indirect_iterator(idps.end()); ++idp) {
if (idp->isValid(now) && idp->getExtensions()) {
const vector<XMLObject*>& exts = const_cast<const Extensions*>(idp->getExtensions())->getUnknownXMLObjects();
for (vector<XMLObject*>::const_iterator ext = exts.begin(); !extFound && ext != exts.end(); ++ext) {
const UIInfo* info = dynamic_cast<UIInfo*>(*ext);
if (info) {
extFound = true;
const vector<DisplayName*>& dispnames = info->getDisplayNames();
if (!dispnames.empty()) {
displayNameFound = true;
s += ",\n \"DisplayNames\": [";
for (indirect_iterator<vector<DisplayName*>::const_iterator> dispname = make_indirect_iterator(dispnames.begin());
dispname != make_indirect_iterator(dispnames.end()); ++dispname) {
if (dispname.base() != dispnames.begin())
s += ',';
auto_arrayptr<char> val(toUTF8(dispname->getName()));
auto_ptr_char lang(dispname->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
const vector<Description*>& descs = info->getDescriptions();
if (!descs.empty()) {
s += ",\n \"Descriptions\": [";
for (indirect_iterator<vector<Description*>::const_iterator> desc = make_indirect_iterator(descs.begin());
desc != make_indirect_iterator(descs.end()); ++desc) {
if (desc.base() != descs.begin())
s += ',';
auto_arrayptr<char> val(toUTF8(desc->getDescription()));
auto_ptr_char lang(desc->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
const vector<Keywords*>& keywords = info->getKeywordss();
if (!keywords.empty()) {
s += ",\n \"Keywords\": [";
for (indirect_iterator<vector<Keywords*>::const_iterator> words = make_indirect_iterator(keywords.begin());
words != make_indirect_iterator(keywords.end()); ++words) {
if (words.base() != keywords.begin())
s += ',';
auto_arrayptr<char> val(toUTF8(words->getValues()));
auto_ptr_char lang(words->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
const vector<InformationURL*>& infurls = info->getInformationURLs();
if (!infurls.empty()) {
s += ",\n \"InformationURLs\": [";
for (indirect_iterator<vector<InformationURL*>::const_iterator> infurl = make_indirect_iterator(infurls.begin());
infurl != make_indirect_iterator(infurls.end()); ++infurl) {
if (infurl.base() != infurls.begin())
s += ',';
auto_ptr_char val(infurl->getURL());
auto_ptr_char lang(infurl->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
const vector<PrivacyStatementURL*>& privs = info->getPrivacyStatementURLs();
if (!privs.empty()) {
s += ",\n \"PrivacyStatementURLs\": [";
for (indirect_iterator<vector<PrivacyStatementURL*>::const_iterator> priv = make_indirect_iterator(privs.begin());
priv != make_indirect_iterator(privs.end()); ++priv) {
if (priv.base() != privs.begin())
s += ',';
auto_ptr_char val(priv->getURL());
auto_ptr_char lang(priv->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
const vector<Logo*>& logos = info->getLogos();
if (!logos.empty()) {
s += ",\n \"Logos\": [";
for (indirect_iterator<vector<Logo*>::const_iterator> logo = make_indirect_iterator(logos.begin());
logo != make_indirect_iterator(logos.end()); ++logo) {
if (logo.base() != logos.begin())
s += ',';
s += "\n {\n";
auto_ptr_char val(logo->getURL());
s += " \"value\": \"";
json_safe(s, val.get());
ostringstream ht;
ht << logo->getHeight().second;
s += "\",\n \"height\": \"";
s += ht.str();
ostringstream wt;
wt << logo->getWidth().second;
s += "\",\n \"width\": \"";
s += wt.str();
s += '\"';
if (logo->getLang()) {
auto_ptr_char lang(logo->getLang());
s += ",\n \"lang\": \"";
s += lang.get();
s += '\"';
}
s += "\n }";
}
s += "\n ]";
}
}
}
}
}
if (m_legacyOrgNames && !displayNameFound) {
const Organization* org = nullptr;
for (indirect_iterator<vector<IDPSSODescriptor*>::const_iterator> idp = make_indirect_iterator(idps.begin());
!org && idp != make_indirect_iterator(idps.end()); ++idp) {
if (idp->isValid(now))
org = idp->getOrganization();
}
if (!org)
org = entity->getOrganization();
if (org) {
const vector<OrganizationDisplayName*>& odns = org->getOrganizationDisplayNames();
if (!odns.empty()) {
s += ",\n \"DisplayNames\": [";
for (indirect_iterator<vector<OrganizationDisplayName*>::const_iterator> dispname = make_indirect_iterator(odns.begin());
dispname != make_indirect_iterator(odns.end()); ++dispname) {
if (dispname.base() != odns.begin())
s += ',';
auto_arrayptr<char> val(toUTF8(dispname->getName()));
auto_ptr_char lang(dispname->getLang());
s += "\n {\n \"value\": \"";
json_safe(s, val.get());
s += "\",\n \"lang\": \"";
s += lang.get();
s += "\"\n }";
}
s += "\n ]";
}
}
}
if (m_entityAttributes) {
bool tagfirst = true;
// Check for an EntityAttributes extension in the entity and its parent(s).
const Extensions* exts = entity->getExtensions();
if (exts) {
const vector<XMLObject*>& children = exts->getUnknownXMLObjects();
const XMLObject* xo = find_if(children, ll_dynamic_cast<EntityAttributes*>(_1) != ((EntityAttributes*)nullptr));
if (xo)
discoEntityAttributes(s, *dynamic_cast<const EntityAttributes*>(xo), tagfirst);
}
const EntitiesDescriptor* group = dynamic_cast<EntitiesDescriptor*>(entity->getParent());
while (group) {
exts = group->getExtensions();
if (exts) {
const vector<XMLObject*>& children = exts->getUnknownXMLObjects();
const XMLObject* xo = find_if(children, ll_dynamic_cast<EntityAttributes*>(_1) != ((EntityAttributes*)nullptr));
if (xo)
discoEntityAttributes(s, *dynamic_cast<const EntityAttributes*>(xo), tagfirst);
}
group = dynamic_cast<EntitiesDescriptor*>(group->getParent());
}
if (!tagfirst)
s += "\n ]";
}
// Close the struct;
s += "\n}";
}
}
}
void DiscoverableMetadataProvider::discoGroup(string& s, const EntitiesDescriptor* group, bool& first) const
{
if (group) {
for_each(
group->getEntitiesDescriptors().begin(), group->getEntitiesDescriptors().end(),
lambda::bind(&DiscoverableMetadataProvider::discoGroup, this, boost::ref(s), _1, boost::ref(first))
);
for_each(
group->getEntityDescriptors().begin(), group->getEntityDescriptors().end(),
lambda::bind(&DiscoverableMetadataProvider::discoEntity, this, boost::ref(s), _1, boost::ref(first))
);
}
}
void DiscoverableMetadataProvider::discoEntityAttributes(std::string& s, const EntityAttributes& ea, bool& first) const
{
discoAttributes(s, ea.getAttributes(), first);
const vector<saml2::Assertion*>& tokens = ea.getAssertions();
for (vector<saml2::Assertion*>::const_iterator t = tokens.begin(); t != tokens.end(); ++t) {
const vector<AttributeStatement*> statements = const_cast<const saml2::Assertion*>(*t)->getAttributeStatements();
for (vector<AttributeStatement*>::const_iterator st = statements.begin(); st != statements.end(); ++st) {
discoAttributes(s, const_cast<const AttributeStatement*>(*st)->getAttributes(), first);
}
}
}
void DiscoverableMetadataProvider::discoAttributes(std::string& s, const vector<Attribute*>& attrs, bool& first) const
{
for (indirect_iterator<vector<Attribute*>::const_iterator> a = make_indirect_iterator(attrs.begin());
a != make_indirect_iterator(attrs.end()); ++a) {
if (first) {
s += ",\n \"EntityAttributes\": [";
first = false;
}
else {
s += ',';
}
auto_ptr_char n(a->getName());
s += "\n {\n \"name\": \"";
json_safe(s, n.get());
s += "\",\n \"values\": [";
const vector<XMLObject*>& vals = const_cast<const Attribute&>(*a).getAttributeValues();
for (indirect_iterator<vector<XMLObject*>::const_iterator> v = make_indirect_iterator(vals.begin());
v != make_indirect_iterator(vals.end()); ++v) {
if (v.base() != vals.begin())
s += ',';
auto_arrayptr<char> val(toUTF8(v->getTextContent()));
s += "\n \"";
if (val.get())
json_safe(s, val.get());
s += '\"';
}
s += "\n ]\n }";
}
}
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