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/*
* Copyright 2001-2009 Internet2
*
* Licensed 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.
*/
/**
* ClientCertAuthRule.cpp
*
* TLS client authentication SecurityPolicyRule
*/
#include "internal.h"
#include "exceptions.h"
#include "binding/SecurityPolicy.h"
#include "binding/SecurityPolicyRule.h"
#include "saml2/metadata/Metadata.h"
#include "saml2/metadata/MetadataCredentialCriteria.h"
#include "saml2/metadata/MetadataProvider.h"
#include <xmltooling/logging.h>
#include <xmltooling/io/GenericRequest.h>
#include <xmltooling/security/Credential.h>
#include <xmltooling/security/X509TrustEngine.h>
#include <xmltooling/util/ReplayCache.h>
using namespace opensaml::saml2md;
using namespace opensaml;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace std;
namespace opensaml {
class SAML_DLLLOCAL ClientCertAuthRule : public SecurityPolicyRule
{
public:
ClientCertAuthRule(const DOMElement* e);
virtual ~ClientCertAuthRule() {}
const char* getType() const {
return CLIENTCERTAUTH_POLICY_RULE;
}
bool evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
private:
bool m_errorFatal;
};
SecurityPolicyRule* SAML_DLLLOCAL ClientCertAuthRuleFactory(const DOMElement* const & e)
{
return new ClientCertAuthRule(e);
}
static const XMLCh errorFatal[] = UNICODE_LITERAL_10(e,r,r,o,r,F,a,t,a,l);
};
ClientCertAuthRule::ClientCertAuthRule(const DOMElement* e) : m_errorFatal(false)
{
if (e) {
const XMLCh* flag = e->getAttributeNS(NULL, errorFatal);
m_errorFatal = (flag && (*flag==chLatin_t || *flag==chDigit_1));
}
}
bool ClientCertAuthRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
{
Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.ClientCertAuth");
if (!request)
return false;
if (!policy.getIssuerMetadata()) {
log.debug("ignoring message, no issuer metadata supplied");
return false;
}
const X509TrustEngine* x509trust;
if (!(x509trust=dynamic_cast<const X509TrustEngine*>(policy.getTrustEngine()))) {
log.debug("ignoring message, no X509TrustEngine supplied");
return false;
}
const vector<XSECCryptoX509*>& chain = request->getClientCertificates();
if (chain.empty())
return false;
// Set up criteria object, including peer name to enforce cert name checking.
MetadataCredentialCriteria cc(*(policy.getIssuerMetadata()));
auto_ptr_char pn(policy.getIssuer()->getName());
cc.setPeerName(pn.get());
cc.setUsage(Credential::TLS_CREDENTIAL);
if (!x509trust->validate(chain.front(), chain, *(policy.getMetadataProvider()), &cc)) {
if (m_errorFatal)
throw SecurityPolicyException("Client certificate supplied, but could not be verified.");
log.error("unable to verify certificate chain with supplied trust engine");
return false;
}
log.debug("client certificate verified against message issuer");
policy.setAuthenticated(true);
return true;
}
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