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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.
*/
/**
* ExcludeMetadataFilter.cpp
*
* Removes excluded entities from a metadata instance
*/
#include "internal.h"
#include "saml2/metadata/EntityMatcher.h"
#include "saml2/metadata/Metadata.h"
#include "saml2/metadata/MetadataFilter.h"
#include <boost/scoped_ptr.hpp>
#include <xmltooling/logging.h>
using namespace opensaml::saml2md;
using namespace opensaml::saml2;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace boost;
using namespace std;
namespace opensaml {
namespace saml2md {
class SAML_DLLLOCAL ExcludeMetadataFilter : public MetadataFilter
{
public:
ExcludeMetadataFilter(const DOMElement* e, bool deprecationSupport=true);
~ExcludeMetadataFilter() {}
const char* getId() const { return EXCLUDE_METADATA_FILTER; }
void doFilter(const MetadataFilterContext* ctx, XMLObject& xmlObject) const;
private:
void filterGroup(EntitiesDescriptor*) const;
bool included(const EntityDescriptor&) const;
set<xstring> m_entities;
scoped_ptr<EntityMatcher> m_matcher;
};
MetadataFilter* SAML_DLLLOCAL ExcludeMetadataFilterFactory(const DOMElement* const & e, bool)
{
return new ExcludeMetadataFilter(e);
}
static const XMLCh Exclude[] = UNICODE_LITERAL_7(E,x,c,l,u,d,e);
static const XMLCh _matcher[] = UNICODE_LITERAL_7(m,a,t,c,h,e,r);
};
};
ExcludeMetadataFilter::ExcludeMetadataFilter(const DOMElement* e, bool deprecationSupport)
{
string matcher(XMLHelper::getAttrString(e, nullptr, _matcher));
if (!matcher.empty())
m_matcher.reset(SAMLConfig::getConfig().EntityMatcherManager.newPlugin(matcher.c_str(), e, deprecationSupport));
e = XMLHelper::getFirstChildElement(e, Exclude);
while (e) {
if (e->hasChildNodes()) {
const XMLCh* excl = XMLHelper::getTextContent(e);
if (excl && *excl)
m_entities.insert(excl);
}
e = XMLHelper::getNextSiblingElement(e, Exclude);
}
}
void ExcludeMetadataFilter::doFilter(const MetadataFilterContext*, XMLObject& xmlObject) const
{
EntitiesDescriptor* group = dynamic_cast<EntitiesDescriptor*>(&xmlObject);
if (group) {
if (group->getName() && !m_entities.empty() && m_entities.count(group->getName()) > 0)
throw MetadataFilterException(EXCLUDE_METADATA_FILTER " MetadataFilter instructed to filter the root group in the metadata.");
filterGroup(group);
}
else {
EntityDescriptor* entity = dynamic_cast<EntityDescriptor*>(&xmlObject);
if (entity) {
if (included(*entity))
throw MetadataFilterException(EXCLUDE_METADATA_FILTER " MetadataFilter instructed to filter the root/only entity in the metadata.");
}
else {
throw MetadataFilterException(EXCLUDE_METADATA_FILTER " MetadataFilter was given an improper metadata instance to filter.");
}
}
}
void ExcludeMetadataFilter::filterGroup(EntitiesDescriptor* entities) const
{
Category& log = Category::getInstance(SAML_LOGCAT ".MetadataFilter." EXCLUDE_METADATA_FILTER);
VectorOf(EntityDescriptor) v = entities->getEntityDescriptors();
for (VectorOf(EntityDescriptor)::size_type i = 0; i < v.size(); ) {
if (included(*v[i])) {
auto_ptr_char id(v[i]->getEntityID());
log.info("filtering out blacklisted entity (%s)", id.get());
v.erase(v.begin() + i);
}
else {
i++;
}
}
VectorOf(EntitiesDescriptor) w = entities->getEntitiesDescriptors();
for (VectorOf(EntitiesDescriptor)::size_type j = 0; j < w.size(); ) {
const XMLCh* name = w[j]->getName();
if (name && !m_entities.empty() && m_entities.count(name) > 0) {
auto_ptr_char name2(name);
log.info("filtering out blacklisted group (%s)", name2.get());
w.erase(w.begin() + j);
}
else {
filterGroup(w[j]);
j++;
}
}
}
bool ExcludeMetadataFilter::included(const EntityDescriptor& entity) const
{
// Check for entityID.
if (entity.getEntityID() && !m_entities.empty() && m_entities.count(entity.getEntityID()) > 0)
return true;
if (m_matcher && m_matcher->matches(entity))
return true;
return false;
}
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