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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.
*/
/**
* SAML2ECPDecoder.cpp
*
* SAML 2.0 ECP profile message decoder.
*/
#include "internal.h"
#include "exceptions.h"
#include "binding/SecurityPolicy.h"
#include "saml2/binding/SAML2MessageDecoder.h"
#include "saml2/core/Protocols.h"
#include <xmltooling/logging.h>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/io/HTTPRequest.h>
#include <xmltooling/soap/SOAP.h>
#include <xmltooling/util/NDC.h>
#include <xmltooling/util/ParserPool.h>
#include <xmltooling/util/Predicates.h>
#include <xmltooling/validation/ValidatorSuite.h>
using namespace opensaml::saml2p;
using namespace opensaml;
using namespace soap11;
using namespace xmltooling::logging;
using namespace xmltooling;
using namespace std;
namespace opensaml {
namespace saml2p {
class SAML_DLLLOCAL SAML2ECPDecoder : public SAML2MessageDecoder
{
public:
SAML2ECPDecoder() {}
virtual ~SAML2ECPDecoder() {}
xmltooling::XMLObject* decode(
std::string& relayState,
const GenericRequest& genericRequest,
SecurityPolicy& policy
) const;
};
MessageDecoder* SAML_DLLLOCAL SAML2ECPDecoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
{
return new SAML2ECPDecoder();
}
};
};
XMLObject* SAML2ECPDecoder::decode(
string& relayState,
const GenericRequest& genericRequest,
SecurityPolicy& policy
) const
{
#ifdef _DEBUG
xmltooling::NDC ndc("decode");
#endif
Category& log = Category::getInstance(SAML_LOGCAT".MessageDecoder.SAML2ECP");
log.debug("validating input");
const HTTPRequest* httpRequest = dynamic_cast<const HTTPRequest*>(&genericRequest);
if (httpRequest) {
string s = httpRequest->getContentType();
if (s.find("application/vnd.paos+xml") == string::npos) {
log.warn("ignoring incorrect content type (%s)", s.c_str() ? s.c_str() : "none");
throw BindingException("Invalid content type for PAOS message.");
}
}
const char* data = genericRequest.getRequestBody();
if (!data)
throw BindingException("PAOS message had an empty request body.");
log.debug("received message:\n%s", data);
istringstream is(data);
// Parse and bind the document into an XMLObject.
DOMDocument* doc = (policy.getValidating() ? XMLToolingConfig::getConfig().getValidatingParser()
: XMLToolingConfig::getConfig().getParser()).parse(is);
XercesJanitor<DOMDocument> janitor(doc);
auto_ptr<XMLObject> xmlObject(XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true));
janitor.release();
Envelope* env = dynamic_cast<Envelope*>(xmlObject.get());
if (!env)
throw BindingException("Decoded message was not a SOAP 1.1 Envelope.");
SchemaValidators.validate(env);
Body* body = env->getBody();
if (body && body->hasChildren()) {
Response* response = dynamic_cast<Response*>(body->getUnknownXMLObjects().front());
if (response) {
// Run through the policy at two layers.
extractMessageDetails(*env, genericRequest, samlconstants::SAML20P_NS, policy);
policy.evaluate(*env, &genericRequest);
policy.reset(true);
extractMessageDetails(*response, genericRequest, samlconstants::SAML20P_NS, policy);
policy.evaluate(*response, &genericRequest);
// Check destination URL if this is HTTP.
if (httpRequest) {
auto_ptr_char dest(response->getDestination());
const char* dest2 = httpRequest->getRequestURL();
const char* delim = strchr(dest2, '?');
if (response->getSignature() && (!dest.get() || !*(dest.get()))) {
log.error("signed SAML message missing Destination attribute");
throw BindingException("Signed SAML message missing Destination attribute identifying intended destination.");
}
else if (dest.get() && *dest.get() && ((delim && strncmp(dest.get(), dest2, delim - dest2)) || (!delim && strcmp(dest.get(), dest2)))) {
log.error("PAOS response targeted at (%s), but delivered to (%s)", dest.get(), dest2);
throw BindingException("SAML message delivered with PAOS to incorrect server URL.");
}
}
// Check for RelayState header.
if (env->getHeader()) {
static const XMLCh RelayState[] = UNICODE_LITERAL_10(R,e,l,a,y,S,t,a,t,e);
const vector<XMLObject*>& blocks = const_cast<const Header*>(env->getHeader())->getUnknownXMLObjects();
vector<XMLObject*>::const_iterator h =
find_if(blocks.begin(), blocks.end(), hasQName(xmltooling::QName(samlconstants::SAML20ECP_NS, RelayState)));
const ElementProxy* ep = dynamic_cast<const ElementProxy*>(h != blocks.end() ? *h : nullptr);
if (ep) {
auto_ptr_char rs(ep->getTextContent());
if (rs.get())
relayState = rs.get();
}
}
xmlObject.release();
body->detach(); // frees Envelope
response->detach(); // frees Body
return response;
}
}
throw BindingException("SOAP Envelope did not contain a SAML Response.");
}
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