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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.
*/
/**
* ConditionsRule.cpp
*
* SAML Conditions SecurityPolicyRule.
*/
#include "internal.h"
#include "exceptions.h"
#include "binding/SecurityPolicy.h"
#include "binding/SecurityPolicyRule.h"
#include "saml1/core/Assertions.h"
#include "saml2/core/Assertions.h"
#include <boost/ptr_container/ptr_vector.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xmltooling/logging.h>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/util/ParserPool.h>
using namespace opensaml;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace boost;
using namespace std;
namespace opensaml {
class SAML_DLLLOCAL ConditionsRule : public SecurityPolicyRule
{
public:
ConditionsRule(const DOMElement* e);
virtual ~ConditionsRule() {
if (m_doc)
m_doc->release();
}
const char* getType() const {
return CONDITIONS_POLICY_RULE;
}
bool evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
private:
DOMDocument* m_doc;
ptr_vector<SecurityPolicyRule> m_rules;
};
SecurityPolicyRule* SAML_DLLLOCAL ConditionsRuleFactory(const DOMElement* const & e)
{
return new ConditionsRule(e);
}
static const XMLCh Rule[] = UNICODE_LITERAL_10(P,o,l,i,c,y,R,u,l,e);
static const XMLCh type[] = UNICODE_LITERAL_4(t,y,p,e);
const char config[] =
"<PolicyRule type=\"Conditions\" xmlns:saml2=\"urn:oasis:names:tc:SAML:2.0:assertion\" xmlns:saml=\"urn:oasis:names:tc:SAML:1.0:assertion\">"
"<PolicyRule type=\"Audience\"/>"
"<PolicyRule type=\"Ignore\">saml:DoNotCacheCondition</PolicyRule>"
"<PolicyRule type=\"Ignore\">saml2:OneTimeUse</PolicyRule>"
"<PolicyRule type=\"Ignore\">saml2:ProxyRestriction</PolicyRule>"
"</PolicyRule>";
};
ConditionsRule::ConditionsRule(const DOMElement* e) : m_doc(nullptr)
{
Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.Conditions");
if (!e || !e->hasChildNodes()) {
// Default the configuration.
istringstream in(config);
m_doc = XMLToolingConfig::getConfig().getParser().parse(in);
e = m_doc->getDocumentElement();
}
e = XMLHelper::getFirstChildElement(e, Rule);
while (e) {
string t = XMLHelper::getAttrString(e, nullptr, type);
if (!t.empty()) {
try {
log.info("building SecurityPolicyRule of type %s", t.c_str());
m_rules.push_back(SAMLConfig::getConfig().SecurityPolicyRuleManager.newPlugin(t.c_str(), e));
}
catch (std::exception& ex) {
log.crit("error building SecurityPolicyRule: %s", ex.what());
}
}
e = XMLHelper::getNextSiblingElement(e, Rule);
}
}
bool ConditionsRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
{
const saml2::Assertion* a2=dynamic_cast<const saml2::Assertion*>(&message);
if (a2) {
const saml2::Conditions* conds = a2->getConditions();
if (!conds)
return true;
// First verify the time conditions, using the specified timestamp.
time_t now = policy.getTime();
unsigned int skew = XMLToolingConfig::getConfig().clock_skew_secs;
time_t t = conds->getNotBeforeEpoch();
if (now + skew < t)
throw SecurityPolicyException("Assertion is not yet valid.");
t = conds->getNotOnOrAfterEpoch();
if (t <= now - skew)
throw SecurityPolicyException("Assertion is no longer valid.");
// Now we process conditions, starting with the known types and then extensions.
bool valid;
const vector<saml2::AudienceRestriction*>& acvec = conds->getAudienceRestrictions();
for (vector<saml2::AudienceRestriction*>::const_iterator ac = acvec.begin(); ac != acvec.end(); ++ac) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*ac), request, policy);
if (!valid)
throw SecurityPolicyException("AudienceRestriction condition not successfully validated by policy.");
}
const vector<saml2::OneTimeUse*>& otvec = conds->getOneTimeUses();
for (vector<saml2::OneTimeUse*>::const_iterator ot = otvec.begin(); ot!=otvec.end(); ++ot) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*ot), request, policy);
if (!valid)
throw SecurityPolicyException("OneTimeUse condition not successfully validated by policy.");
}
const vector<saml2::ProxyRestriction*> pvec = conds->getProxyRestrictions();
for (vector<saml2::ProxyRestriction*>::const_iterator p = pvec.begin(); p != pvec.end(); ++p) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*p), request, policy);
if (!valid)
throw SecurityPolicyException("ProxyRestriction condition not successfully validated by policy.");
}
const vector<saml2::Condition*>& convec = conds->getConditions();
for (vector<saml2::Condition*>::const_iterator c = convec.begin(); c != convec.end(); ++c) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*c), request, policy);
if (!valid) {
throw SecurityPolicyException(
"Extension condition ($1) not successfully validated by policy.",
params(1,((*c)->getSchemaType() ? (*c)->getSchemaType()->toString().c_str() : "Unknown Type"))
);
}
}
return true;
}
const saml1::Assertion* a1=dynamic_cast<const saml1::Assertion*>(&message);
if (a1) {
const saml1::Conditions* conds = a1->getConditions();
if (!conds)
return true;
// First verify the time conditions, using the specified timestamp.
time_t now = policy.getTime();
unsigned int skew = XMLToolingConfig::getConfig().clock_skew_secs;
time_t t = conds->getNotBeforeEpoch();
if (now + skew < t)
throw SecurityPolicyException("Assertion is not yet valid.");
t = conds->getNotOnOrAfterEpoch();
if (t <= now - skew)
throw SecurityPolicyException("Assertion is no longer valid.");
// Now we process conditions, starting with the known types and then extensions.
bool valid;
const vector<saml1::AudienceRestrictionCondition*>& acvec = conds->getAudienceRestrictionConditions();
for (vector<saml1::AudienceRestrictionCondition*>::const_iterator ac = acvec.begin(); ac != acvec.end(); ++ac) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*ac), request, policy);
if (!valid)
throw SecurityPolicyException("AudienceRestrictionCondition not successfully validated by policy.");
}
const vector<saml1::DoNotCacheCondition*>& dncvec = conds->getDoNotCacheConditions();
for (vector<saml1::DoNotCacheCondition*>::const_iterator dnc = dncvec.begin(); dnc != dncvec.end(); ++dnc) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*dnc), request, policy);
if (!valid)
throw SecurityPolicyException("DoNotCacheCondition not successfully validated by policy.");
}
const vector<saml1::Condition*>& convec = conds->getConditions();
for (vector<saml1::Condition*>::const_iterator c = convec.begin(); c != convec.end(); ++c) {
valid = false;
for (ptr_vector<SecurityPolicyRule>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
valid = r->evaluate(*(*c), request, policy);
if (!valid) {
throw SecurityPolicyException(
"Extension condition ($1) not successfully validated by policy.",
params(1,((*c)->getSchemaType() ? (*c)->getSchemaType()->toString().c_str() : (*c)->getElementQName().toString().c_str()))
);
}
}
return true;
}
return false;
}
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