2 * Copyright 2001-2006 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * ClientCertAuthRule.cpp
20 * XML Signature checking SecurityPolicyRule
24 #include "exceptions.h"
25 #include "binding/ClientCertAuthRule.h"
26 #include "saml2/metadata/Metadata.h"
27 #include "saml2/metadata/MetadataProvider.h"
29 #include <xmltooling/security/X509TrustEngine.h>
30 #include <xmltooling/util/NDC.h>
31 #include <xmltooling/util/ReplayCache.h>
32 #include <log4cpp/Category.hh>
34 using namespace opensaml::saml2md;
35 using namespace opensaml;
36 using namespace xmltooling;
37 using namespace log4cpp;
41 SecurityPolicyRule* SAML_DLLLOCAL ClientCertAuthRuleFactory(const DOMElement* const & e)
43 return new ClientCertAuthRule(e);
47 pair<saml2::Issuer*,const RoleDescriptor*> ClientCertAuthRule::evaluate(
48 const XMLObject& message,
49 const GenericRequest* request,
50 const MetadataProvider* metadataProvider,
52 const TrustEngine* trustEngine
55 Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.ClientCertAuth");
56 log.debug("evaluating client certificate authentication policy");
58 pair<saml2::Issuer*,const RoleDescriptor*> ret = pair<saml2::Issuer*,const RoleDescriptor*>(NULL,NULL);
60 log.debug("ignoring message, no protocol request available");
64 const X509TrustEngine* x509trust;
65 if (!metadataProvider || !role || !(x509trust=dynamic_cast<const X509TrustEngine*>(trustEngine))) {
66 log.debug("ignoring message, no metadata or X509TrustEngine supplied");
70 const std::vector<XSECCryptoX509*>& chain = request->getClientCertificates();
72 log.debug("ignoring message, no client certificates in request");
77 log.debug("extracting issuer from message");
78 pair<saml2::Issuer*,const XMLCh*> issuerInfo = getIssuerAndProtocol(message);
80 auto_ptr<saml2::Issuer> issuer(issuerInfo.first);
81 if (!issuerInfo.first || !issuerInfo.second ||
82 (issuer->getFormat() && !XMLString::equals(issuer->getFormat(), saml2::NameIDType::ENTITY))) {
83 log.warn("issuer identity not estabished, or was not an entityID");
87 log.debug("searching metadata for message issuer...");
88 const EntityDescriptor* entity = metadataProvider->getEntityDescriptor(issuer->getName());
90 auto_ptr_char temp(issuer->getName());
91 log.warn("no metadata found, can't establish identity of issuer (%s)", temp.get());
95 log.debug("matched message issuer against metadata, searching for applicable role...");
96 const RoleDescriptor* roledesc=entity->getRoleDescriptor(*role, issuerInfo.second);
98 log.warn("unable to find compatible role (%s) in metadata", role->toString().c_str());
102 if (!x509trust->validate(chain.front(), chain, *roledesc, true, metadataProvider->getKeyResolver())) {
103 log.error("unable to verify certificate chain with supplied trust engine");
107 if (log.isDebugEnabled()) {
108 auto_ptr_char iname(entity->getEntityID());
109 log.debug("message from (%s), signature verified", iname.get());
112 ret.first = issuer.release();
113 ret.second = roledesc;
117 log.warn("caught a bad_cast while extracting issuer");
122 pair<saml2::Issuer*,const XMLCh*> ClientCertAuthRule::getIssuerAndProtocol(const XMLObject& message) const
124 // We just let any bad casts throw here.
126 // Shortcuts some of the casting.
127 const XMLCh* ns = message.getElementQName().getNamespaceURI();
129 if (XMLString::equals(ns, samlconstants::SAML20P_NS)) {
130 // 2.0 namespace should be castable to a specialized 2.0 root.
131 const saml2::RootObject& root = dynamic_cast<const saml2::RootObject&>(message);
132 saml2::Issuer* issuer = root.getIssuer();
133 if (issuer && issuer->getName())
134 return make_pair(issuer->cloneIssuer(), samlconstants::SAML20P_NS);
137 return pair<saml2::Issuer*,const XMLCh*>(NULL,NULL);