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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.
*/
/**
* SAML1ArtifactDecoder.cpp
*
* SAML 1.x Artifact binding/profile message decoder
*/
#include "internal.h"
#include "exceptions.h"
#include "binding/SAMLArtifact.h"
#include "binding/SecurityPolicy.h"
#include "saml1/binding/SAML1MessageDecoder.h"
#include "saml1/core/Protocols.h"
#include "saml2/metadata/Metadata.h"
#include "saml2/metadata/MetadataProvider.h"
#include <boost/ptr_container/ptr_vector.hpp>
#include <xmltooling/logging.h>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/io/HTTPRequest.h>
#include <xmltooling/util/NDC.h>
#include <xmltooling/util/ReplayCache.h>
using namespace opensaml::saml2md;
using namespace opensaml::saml1p;
using namespace opensaml;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace std;
using boost::ptr_vector;
namespace opensaml {
namespace saml1p {
class SAML_DLLLOCAL SAML1ArtifactDecoder : public SAML1MessageDecoder
{
public:
SAML1ArtifactDecoder() {}
virtual ~SAML1ArtifactDecoder() {}
xmltooling::XMLObject* decode(
std::string& relayState,
const GenericRequest& genericRequest,
GenericResponse* genericResponse,
SecurityPolicy& policy
) const;
};
MessageDecoder* SAML_DLLLOCAL SAML1ArtifactDecoderFactory(const DOMElement* const&, bool)
{
return new SAML1ArtifactDecoder();
}
};
};
XMLObject* SAML1ArtifactDecoder::decode(
string& relayState,
const GenericRequest& genericRequest,
GenericResponse*,
SecurityPolicy& policy
) const
{
#ifdef _DEBUG
xmltooling::NDC ndc("decode");
#endif
Category& log = Category::getInstance(SAML_LOGCAT ".MessageDecoder.SAML1Artifact");
log.debug("validating input");
const HTTPRequest* httpRequest=dynamic_cast<const HTTPRequest*>(&genericRequest);
if (!httpRequest)
throw BindingException("Unable to cast request object to HTTPRequest type.");
vector<const char*> SAMLart;
const char* TARGET = httpRequest->getParameter("TARGET");
if (httpRequest->getParameters("SAMLart", SAMLart)==0 || !TARGET)
throw BindingException("Request missing SAMLart or TARGET query string parameters.");
relayState = TARGET;
if (!m_artifactResolver || !policy.getMetadataProvider() || !policy.getRole())
throw BindingException("Artifact profile requires ArtifactResolver and MetadataProvider implementations be supplied.");
// Import the artifacts.
vector<SAMLArtifact*> artifactptrs; // needed for compatibility with non-Boost API in ArtifactResolver
ptr_vector<SAMLArtifact> artifacts;
for (vector<const char*>::const_iterator raw=SAMLart.begin(); raw!=SAMLart.end(); ++raw) {
try {
log.debug("processing encoded artifact (%s)", *raw);
// Check replay.
ReplayCache* replayCache = XMLToolingConfig::getConfig().getReplayCache();
if (replayCache) {
if (!replayCache->check("SAML1Artifact", *raw, time(nullptr) + (2*XMLToolingConfig::getConfig().clock_skew_secs))) {
log.error("replay detected of artifact (%s)", *raw);
throw BindingException("Rejecting replayed artifact ($1).", params(1,*raw));
}
}
else
log.warn("replay cache was not provided, this is a serious security risk!");
artifacts.push_back(SAMLArtifact::parse(*raw));
artifactptrs.push_back(&(artifacts.back()));
}
catch (ArtifactException&) {
log.error("error parsing artifact (%s)", *raw);
throw;
}
}
log.debug("attempting to determine source of artifact(s)...");
MetadataProvider::Criteria& mc = policy.getMetadataProviderCriteria();
mc.artifact = &(artifacts.front());
mc.role = policy.getRole();
mc.protocol = samlconstants::SAML11_PROTOCOL_ENUM;
mc.protocol2 = samlconstants::SAML10_PROTOCOL_ENUM;
pair<const EntityDescriptor*,const RoleDescriptor*> provider=policy.getMetadataProvider()->getEntityDescriptor(mc);
if (!provider.first) {
log.error(
"metadata lookup failed, unable to determine issuer of artifact (0x%s)",
SAMLArtifact::toHex(artifacts.front().getBytes()).c_str()
);
throw BindingException("Metadata lookup failed, unable to determine artifact issuer");
}
if (log.isDebugEnabled()) {
auto_ptr_char issuer(provider.first->getEntityID());
log.debug("artifact issued by (%s)", issuer.get());
}
if (!provider.second || !dynamic_cast<const IDPSSODescriptor*>(provider.second)) {
log.error("unable to find compatible SAML 1.x role (%s) in metadata", policy.getRole()->toString().c_str());
throw BindingException("Unable to find compatible metadata role for artifact issuer.");
}
// Set Issuer for the policy.
policy.setIssuer(provider.first->getEntityID());
policy.setIssuerMetadata(provider.second);
log.debug("calling ArtifactResolver...");
auto_ptr<Response> response(
m_artifactResolver->resolve(artifactptrs, dynamic_cast<const IDPSSODescriptor&>(*provider.second), policy)
);
// The policy should be enforced against the Response by the resolve step.
return response.release();
}
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