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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.
*/
/**
* CaseFoldingAttributeResolver.cpp
*
* Attribute Resolver plugins for upcasing and downcasing.
*/
#include "internal.h"
#include <algorithm>
#include <shibsp/exceptions.h>
#include <shibsp/SessionCache.h>
#include <shibsp/attribute/SimpleAttribute.h>
#include <shibsp/attribute/resolver/AttributeResolver.h>
#include <shibsp/attribute/resolver/ResolutionContext.h>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/util/XMLHelper.h>
#include <xercesc/util/XMLUniDefs.hpp>
using namespace shibsp;
using namespace xmltooling;
using namespace xercesc;
using namespace std;
namespace shibsp {
class SHIBSP_DLLLOCAL FoldingContext : public ResolutionContext
{
public:
FoldingContext(const vector<Attribute*>* attributes) : m_inputAttributes(attributes) {
}
~FoldingContext() {
for_each(m_attributes.begin(), m_attributes.end(), xmltooling::cleanup<Attribute>());
}
const vector<Attribute*>* getInputAttributes() const {
return m_inputAttributes;
}
vector<Attribute*>& getResolvedAttributes() {
return m_attributes;
}
vector<opensaml::Assertion*>& getResolvedAssertions() {
return m_assertions;
}
private:
const vector<Attribute*>* m_inputAttributes;
vector<Attribute*> m_attributes;
static vector<opensaml::Assertion*> m_assertions; // empty dummy
};
class SHIBSP_DLLLOCAL CaseFoldingAttributeResolver : public AttributeResolver
{
public:
enum case_t {
_up,
_down
};
CaseFoldingAttributeResolver(const DOMElement* e, case_t direction);
virtual ~CaseFoldingAttributeResolver() {}
Lockable* lock() {
return this;
}
void unlock() {
}
ResolutionContext* createResolutionContext(
const Application& application,
const GenericRequest* request,
const opensaml::saml2md::EntityDescriptor* issuer,
const XMLCh* protocol,
const opensaml::saml2::NameID* nameid=nullptr,
const XMLCh* authncontext_class=nullptr,
const XMLCh* authncontext_decl=nullptr,
const vector<const opensaml::Assertion*>* tokens=nullptr,
const vector<Attribute*>* attributes=nullptr
) const {
return new FoldingContext(attributes);
}
ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
return new FoldingContext(&session.getAttributes());
}
void resolveAttributes(ResolutionContext& ctx) const;
void getAttributeIds(vector<string>& attributes) const {
if (!m_dest.empty() && !m_dest.front().empty())
attributes.push_back(m_dest.front());
}
private:
Category& m_log;
case_t m_direction;
string m_source;
vector<string> m_dest;
};
static const XMLCh dest[] = UNICODE_LITERAL_4(d,e,s,t);
static const XMLCh source[] = UNICODE_LITERAL_6(s,o,u,r,c,e);
AttributeResolver* SHIBSP_DLLLOCAL UpperCaseAttributeResolverFactory(const DOMElement* const & e, bool)
{
return new CaseFoldingAttributeResolver(e, CaseFoldingAttributeResolver::_up);
}
AttributeResolver* SHIBSP_DLLLOCAL LowerCaseAttributeResolverFactory(const DOMElement* const & e, bool)
{
return new CaseFoldingAttributeResolver(e, CaseFoldingAttributeResolver::_down);
}
};
vector<opensaml::Assertion*> FoldingContext::m_assertions;
CaseFoldingAttributeResolver::CaseFoldingAttributeResolver(const DOMElement* e, case_t direction)
: m_log(Category::getInstance(SHIBSP_LOGCAT ".AttributeResolver.CaseFolding")),
m_direction(direction),
m_source(XMLHelper::getAttrString(e, nullptr, source)),
m_dest(1, XMLHelper::getAttrString(e, nullptr, dest))
{
if (m_source.empty())
throw ConfigurationException("CaseFolding AttributeResolver requires source attribute.");
}
void CaseFoldingAttributeResolver::resolveAttributes(ResolutionContext& ctx) const
{
FoldingContext& fctx = dynamic_cast<FoldingContext&>(ctx);
if (!fctx.getInputAttributes())
return;
auto_ptr<SimpleAttribute> destwrapper;
for (vector<Attribute*>::const_iterator a = fctx.getInputAttributes()->begin(); a != fctx.getInputAttributes()->end(); ++a) {
if (m_source != (*a)->getId() || (*a)->valueCount() == 0) {
continue;
}
SimpleAttribute* dest = nullptr;
if (m_dest.empty() || m_dest.front().empty()) {
// Can we transform in-place?
dest = dynamic_cast<SimpleAttribute*>(*a);
if (!dest) {
m_log.warn("can't %scase non-simple attribute (%s) 'in place'", (m_direction==_up ? "up" : "down"), m_source.c_str());
continue;
}
m_log.debug("applying in-place transform to source attribute (%s)", m_source.c_str());
}
else if (!destwrapper.get()) {
// Create a destination attribute.
destwrapper.reset(new SimpleAttribute(m_dest));
m_log.debug("applying transform from source attribute (%s) to dest attribute (%s)", m_source.c_str(), m_dest.front().c_str());
}
for (size_t i = 0; i < (*a)->valueCount(); ++i) {
try {
XMLCh* srcval = fromUTF8((*a)->getSerializedValues()[i].c_str());
if (srcval) {
auto_arrayptr<XMLCh> valjanitor(srcval);
(m_direction == _up) ? XMLString::upperCase(srcval) : XMLString::lowerCase(srcval);
auto_arrayptr<char> narrow(toUTF8(srcval));
if (dest) {
// Modify in place.
dest->getValues()[i] = narrow.get();
}
else {
// Add to new object.
destwrapper->getValues().push_back(narrow.get());
}
}
}
catch (XMLException& ex) {
auto_ptr_char msg(ex.getMessage());
m_log.error("caught error performing conversion: %s", msg.get());
}
}
}
// Save off new object.
if (destwrapper.get()) {
ctx.getResolvedAttributes().push_back(destwrapper.get());
destwrapper.release();
}
}
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