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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.
*/
/**
* BearerConfirmationRule.cpp
*
* SAML 2.0 Bearer SubjectConfirmation SecurityPolicyRule.
*/
#include "internal.h"
#include "exceptions.h"
#include "binding/SecurityPolicyRule.h"
#include "saml2/core/Assertions.h"
#include "saml2/profile/SAML2AssertionPolicy.h"
#include <xercesc/util/XMLUniDefs.hpp>
#include <xmltooling/logging.h>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/io/HTTPRequest.h>
using namespace opensaml::saml2;
using namespace xmltooling;
using namespace std;
namespace opensaml {
namespace saml2 {
class SAML_DLLLOCAL BearerConfirmationRule : public opensaml::SecurityPolicyRule
{
public:
BearerConfirmationRule(const DOMElement* e);
virtual ~BearerConfirmationRule() {
}
const char* getType() const {
return BEARER_POLICY_RULE;
}
bool evaluate(const XMLObject& message, const GenericRequest* request, opensaml::SecurityPolicy& policy) const;
private:
logging::Category& m_log;
bool m_validity, m_recipient, m_correlation, m_blockUnsolicited, m_fatal;
};
opensaml::SecurityPolicyRule* SAML_DLLLOCAL BearerConfirmationRuleFactory(const DOMElement* const & e, bool)
{
return new BearerConfirmationRule(e);
}
static const XMLCh blockUnsolicited[] = UNICODE_LITERAL_16(b,l,o,c,k,U,n,s,o,l,i,c,i,t,e,d);
static const XMLCh checkValidity[] = UNICODE_LITERAL_13(c,h,e,c,k,V,a,l,i,d,i,t,y);
static const XMLCh checkRecipient[] = UNICODE_LITERAL_14(c,h,e,c,k,R,e,c,i,p,i,e,n,t);
static const XMLCh checkCorrelation[] = UNICODE_LITERAL_16(c,h,e,c,k,C,o,r,r,e,l,a,t,i,o,n);
static const XMLCh missingFatal[] = UNICODE_LITERAL_12(m,i,s,s,i,n,g,F,a,t,a,l);
};
};
BearerConfirmationRule::BearerConfirmationRule(const DOMElement* e) : SecurityPolicyRule(e),
m_log(logging::Category::getInstance(SAML_LOGCAT ".SecurityPolicyRule.BearerConfirmation")),
m_validity(XMLHelper::getAttrBool(e, true, checkValidity)),
m_recipient(XMLHelper::getAttrBool(e, true, checkRecipient)),
m_correlation(XMLHelper::getAttrBool(e, false, checkCorrelation)),
m_blockUnsolicited(XMLHelper::getAttrBool(e, false, blockUnsolicited)),
m_fatal(XMLHelper::getAttrBool(e, true, missingFatal))
{
if (m_profiles.empty()) {
m_profiles.insert(samlconstants::SAML20_PROFILE_SSO_BROWSER);
m_profiles.insert(samlconstants::SAML20_PROFILE_SSO_ECP);
}
if (m_blockUnsolicited && !m_correlation) {
m_correlation = true;
m_log.info("enabling request/response correlation checking to block unsolicited responses");
}
}
bool BearerConfirmationRule::evaluate(const XMLObject& message, const GenericRequest* request, opensaml::SecurityPolicy& policy) const
{
if (!SecurityPolicyRule::evaluate(message, request, policy)) {
return false;
}
const Assertion* a=dynamic_cast<const Assertion*>(&message);
if (!a)
return false;
const char* msg="assertion is missing bearer SubjectConfirmation";
const Subject* subject = a->getSubject();
if (subject) {
const vector<SubjectConfirmation*>& confs = subject->getSubjectConfirmations();
for (vector<SubjectConfirmation*>::const_iterator sc = confs.begin(); sc!=confs.end(); ++sc) {
if (XMLString::equals((*sc)->getMethod(), SubjectConfirmation::BEARER)) {
const SubjectConfirmationDataType* data = dynamic_cast<const SubjectConfirmationDataType*>((*sc)->getSubjectConfirmationData());
if (m_recipient) {
const HTTPRequest* httpRequest = dynamic_cast<const HTTPRequest*>(request);
if (httpRequest && httpRequest->getRequestURL()) {
string dest = httpRequest->getRequestURL();
auto_ptr_XMLCh destination(dest.substr(0,dest.find('?')).c_str());
if (!XMLString::equals(destination.get(), data ? data->getRecipient() : nullptr)) {
msg = "bearer confirmation failed with recipient mismatch";
continue;
}
}
}
if (m_correlation) {
if (policy.getCorrelationID() && *(policy.getCorrelationID())) {
if (XMLString::equals(policy.getCorrelationID(), data ? data->getInResponseTo() : nullptr)) {
m_log.debug("request/response correlation validated");
}
else {
msg = "bearer confirmation failed on lack of request/response correlation";
continue;
}
}
else if (data && data->getInResponseTo() && *(data->getInResponseTo())) {
msg = "bearer confirmation issued in response to request failed on lack of correlation ID";
continue;
}
else if (m_blockUnsolicited) {
msg = "unsolicited bearer confirmation rejected by policy";
continue;
}
else {
m_log.debug("unsolicited response accepted");
}
}
else {
m_log.debug("ignoring InResponseTo, correlation checking is disabled");
}
if (m_validity) {
if (!data || !data->getNotOnOrAfter()) {
msg = "bearer SubjectConfirmationData missing NotOnOrAfter attribute";
continue;
}
else if (data->getNotOnOrAfterEpoch() <= policy.getTime() - XMLToolingConfig::getConfig().clock_skew_secs) {
msg = "bearer confirmation has expired";
continue;
}
if (data && data->getNotBefore() && policy.getTime() + XMLToolingConfig::getConfig().clock_skew_secs < data->getNotBeforeEpoch()) {
msg = "bearer confirmation not yet valid";
continue;
}
}
SAML2AssertionPolicy* saml2policy = dynamic_cast<SAML2AssertionPolicy*>(&policy);
if (saml2policy)
saml2policy->setSubjectConfirmation(*sc);
m_log.debug("assertion satisfied bearer confirmation requirements");
return true;
}
}
}
m_log.warn(msg ? msg : "no error message");
if (m_fatal)
throw SecurityPolicyException("Unable to locate satisfiable bearer SubjectConfirmation in assertion.");
return false;
}
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