+/*
+ * Copyright 2001-2006 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
+ *
+ * XML Signature checking SecurityPolicyRule
+ */
+
+#include "internal.h"
+#include "exceptions.h"
+#include "binding/ClientCertAuthRule.h"
+#include "saml2/metadata/Metadata.h"
+#include "saml2/metadata/MetadataProvider.h"
+#include "security/X509TrustEngine.h"
+
+#include <xmltooling/util/NDC.h>
+#include <xmltooling/util/ReplayCache.h>
+#include <log4cpp/Category.hh>
+
+using namespace opensaml::saml2md;
+using namespace opensaml;
+using namespace xmltooling;
+using namespace log4cpp;
+using namespace std;
+
+namespace opensaml {
+ SecurityPolicyRule* SAML_DLLLOCAL ClientCertAuthRuleFactory(const DOMElement* const & e)
+ {
+ return new ClientCertAuthRule(e);
+ }
+};
+
+pair<saml2::Issuer*,const RoleDescriptor*> ClientCertAuthRule::evaluate(
+ const GenericRequest& request,
+ const XMLObject& message,
+ const MetadataProvider* metadataProvider,
+ const QName* role,
+ const opensaml::TrustEngine* trustEngine,
+ const MessageExtractor& extractor
+ ) const
+{
+ Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.ClientCertAuth");
+ log.debug("evaluating client certificate authentication policy");
+
+ pair<saml2::Issuer*,const RoleDescriptor*> ret = pair<saml2::Issuer*,const RoleDescriptor*>(NULL,NULL);
+
+ const opensaml::X509TrustEngine* x509trust;
+ if (!metadataProvider || !role || !(x509trust=dynamic_cast<const opensaml::X509TrustEngine*>(trustEngine))) {
+ log.debug("ignoring message, no metadata or X509TrustEngine supplied");
+ return ret;
+ }
+
+ const std::vector<XSECCryptoX509*>& chain = request.getClientCertificates();
+ if (chain.empty()) {
+ log.debug("ignoring message, no client certificates in request");
+ return ret;
+ }
+
+ try {
+ log.debug("extracting issuer from message");
+ pair<saml2::Issuer*,const XMLCh*> issuerInfo = extractor.getIssuerAndProtocol(message);
+
+ auto_ptr<saml2::Issuer> issuer(issuerInfo.first);
+ if (!issuerInfo.first || !issuerInfo.second ||
+ (issuer->getFormat() && !XMLString::equals(issuer->getFormat(), saml2::NameIDType::ENTITY))) {
+ log.warn("issuer identity not estabished, or was not an entityID");
+ return ret;
+ }
+
+ log.debug("searching metadata for message issuer...");
+ const EntityDescriptor* entity = metadataProvider->getEntityDescriptor(issuer->getName());
+ if (!entity) {
+ auto_ptr_char temp(issuer->getName());
+ log.warn("no metadata found, can't establish identity of issuer (%s)", temp.get());
+ return ret;
+ }
+
+ log.debug("matched message issuer against metadata, searching for applicable role...");
+ const RoleDescriptor* roledesc=entity->getRoleDescriptor(*role, issuerInfo.second);
+ if (!roledesc) {
+ log.warn("unable to find compatible role (%s) in metadata", role->toString().c_str());
+ return ret;
+ }
+
+ if (!x509trust->validate(chain.front(), chain, *roledesc, true, metadataProvider->getKeyResolver())) {
+ log.error("unable to verify certificate chain with supplied trust engine");
+ return ret;
+ }
+
+ if (log.isDebugEnabled()) {
+ auto_ptr_char iname(entity->getEntityID());
+ log.debug("message from (%s), signature verified", iname.get());
+ }
+
+ ret.first = issuer.release();
+ ret.second = roledesc;
+ }
+ catch (bad_cast&) {
+ // Just trap it.
+ log.warn("caught a bad_cast while extracting issuer");
+ }
+ return ret;
+}