/*
- * Copyright 2001-2006 Internet2
- *
+ * 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
/**
* SAML2RedirectDecoder.cpp
- *
+ *
* SAML 2.0 HTTP Redirect binding message encoder
*/
#include "internal.h"
#include "exceptions.h"
+#include "saml2/binding/SAML2MessageDecoder.h"
#include "saml2/binding/SAML2Redirect.h"
-#include "saml2/binding/SAML2RedirectDecoder.h"
#include "saml2/core/Protocols.h"
#include "saml2/metadata/Metadata.h"
#include "saml2/metadata/MetadataProvider.h"
-#include "security/X509TrustEngine.h"
-#include <log4cpp/Category.hh>
#include <xercesc/util/Base64.hpp>
+#include <xmltooling/logging.h>
+#include <xmltooling/io/HTTPRequest.h>
#include <xmltooling/util/NDC.h>
-#include <xmltooling/util/ReplayCache.h>
#include <xmltooling/validation/ValidatorSuite.h>
using namespace opensaml::saml2md;
using namespace opensaml::saml2;
using namespace opensaml;
using namespace xmlsignature;
+using namespace xmltooling::logging;
using namespace xmltooling;
-using namespace log4cpp;
using namespace std;
namespace opensaml {
- namespace saml2p {
- MessageDecoder* SAML_DLLLOCAL SAML2RedirectDecoderFactory(const DOMElement* const & e)
+ namespace saml2p {
+ class SAML_DLLLOCAL SAML2RedirectDecoder : public SAML2MessageDecoder
+ {
+ public:
+ SAML2RedirectDecoder() {}
+ virtual ~SAML2RedirectDecoder() {}
+
+ xmltooling::XMLObject* decode(
+ std::string& relayState,
+ const GenericRequest& genericRequest,
+ SecurityPolicy& policy
+ ) const;
+ };
+
+ MessageDecoder* SAML_DLLLOCAL SAML2RedirectDecoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
{
- return new SAML2RedirectDecoder(e);
+ return new SAML2RedirectDecoder();
}
};
};
-SAML2RedirectDecoder::SAML2RedirectDecoder(const DOMElement* e) {}
-
-SAML2RedirectDecoder::~SAML2RedirectDecoder() {}
-
XMLObject* SAML2RedirectDecoder::decode(
string& relayState,
- const RoleDescriptor*& issuer,
- const XMLCh*& securityMech,
- const HTTPRequest& httpRequest,
- const MetadataProvider* metadataProvider,
- const QName* role,
- const opensaml::TrustEngine* trustEngine
+ const GenericRequest& genericRequest,
+ SecurityPolicy& policy
) const
{
#ifdef _DEBUG
Category& log = Category::getInstance(SAML_LOGCAT".MessageDecoder.SAML2Redirect");
log.debug("validating input");
- if (strcmp(httpRequest.getMethod(),"GET"))
- return NULL;
- const char* msg = httpRequest.getParameter("SAMLResponse");
+ const HTTPRequest* httpRequest=dynamic_cast<const HTTPRequest*>(&genericRequest);
+ if (!httpRequest)
+ throw BindingException("Unable to cast request object to HTTPRequest type.");
+ const char* msg = httpRequest->getParameter("SAMLResponse");
if (!msg)
- msg = httpRequest.getParameter("SAMLRequest");
+ msg = httpRequest->getParameter("SAMLRequest");
if (!msg)
- return NULL;
- const char* state = httpRequest.getParameter("RelayState");
+ throw BindingException("Request missing SAMLRequest or SAMLResponse query string parameter.");
+ const char* state = httpRequest->getParameter("RelayState");
if (state)
relayState = state;
else
relayState.erase();
- state = httpRequest.getParameter("SAMLEncoding");
+ state = httpRequest->getParameter("SAMLEncoding");
if (state && strcmp(state,samlconstants::SAML20_BINDING_URL_ENCODING_DEFLATE)) {
log.warn("SAMLEncoding (%s) was not recognized", state);
- return NULL;
+ throw BindingException("Unsupported SAMLEncoding value.");
}
// Decode the compressed message into SAML. First we base64-decode it.
- unsigned int x;
+ xsecsize_t x;
XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(msg),&x);
if (!decoded)
throw BindingException("Unable to decode base64 in Redirect binding message.");
-
+
// Now we have to inflate it.
- stringstream str;
- if (inflate((char*)decoded, x, str)==0) {
+ stringstream s;
+ if (inflate(reinterpret_cast<char*>(decoded), x, s)==0) {
+#ifdef OPENSAML_XERCESC_HAS_XMLBYTE_RELEASE
XMLString::release(&decoded);
+#else
+ XMLString::release((char**)&decoded);
+#endif
throw BindingException("Unable to inflate Redirect binding message.");
}
-
+ if (log.isDebugEnabled())
+ log.debug("decoded SAML message:\n%s", s.str().c_str());
+#ifdef OPENSAML_XERCESC_HAS_XMLBYTE_RELEASE
XMLString::release(&decoded);
-
+#else
+ XMLString::release((char**)&decoded);
+#endif
+
// Parse and bind the document into an XMLObject.
- DOMDocument* doc = (m_validate ? XMLToolingConfig::getConfig().getValidatingParser()
- : XMLToolingConfig::getConfig().getParser()).parse(str);
+ DOMDocument* doc = (policy.getValidating() ? XMLToolingConfig::getConfig().getValidatingParser()
+ : XMLToolingConfig::getConfig().getParser()).parse(s);
XercesJanitor<DOMDocument> janitor(doc);
auto_ptr<XMLObject> xmlObject(XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true));
janitor.release();
+ saml2::RootObject* root = NULL;
StatusResponseType* response = NULL;
RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject.get());
if (!request) {
response = dynamic_cast<StatusResponseType*>(xmlObject.get());
if (!response)
- throw BindingException("XML content for SAML 2.0 HTTP-Redirect Decoder must be a SAML 2.0 protocol message.");
+ throw BindingException("XML content for SAML 2.0 HTTP-POST Decoder must be a SAML 2.0 protocol message.");
+ root = static_cast<saml2::RootObject*>(response);
}
-
- /* For SAML 2, the issuer can be established either from the message, or in some profiles
- * it's possible to omit it and defer to assertions in a Response.
- * The Issuer is later matched against metadata, and then trust checking can be applied.
- */
- const Issuer* claimedIssuer = request ? request->getIssuer() : response->getIssuer();
- if (!claimedIssuer) {
- // Check assertion option. I cannot resist the variable name, for the sake of google.
- const Response* assbag = dynamic_cast<const Response*>(response);
- if (assbag) {
- const vector<Assertion*>& assertions=assbag->getAssertions();
- if (!assertions.empty())
- claimedIssuer = assertions.front()->getIssuer();
- }
+ else {
+ root = static_cast<saml2::RootObject*>(request);
}
- const EntityDescriptor* provider=NULL;
- try {
- if (!m_validate)
- SchemaValidators.validate(xmlObject.get());
-
- // Check destination URL.
- auto_ptr_char dest(request ? request->getDestination() : response->getDestination());
- const char* dest2 = httpRequest.getRequestURL();
- if (!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() && (!dest2 || !*dest2 || strcmp(dest.get(),dest2))) {
- log.error("Redirect targeted at (%s), but delivered to (%s)", dest.get(), dest2 ? dest2 : "none");
- throw BindingException("SAML message delivered with Redirect to incorrect server URL.");
- }
-
- // Check freshness.
- time_t now = time(NULL);
- if ((request ? request->getIssueInstant()->getEpoch() : response->getIssueInstant()->getEpoch())
- < now-(2*XMLToolingConfig::getConfig().clock_skew_secs))
- throw BindingException("Detected expired Redirect binding message.");
-
- // Check replay.
- ReplayCache* replayCache = XMLToolingConfig::getConfig().getReplayCache();
- if (replayCache) {
- auto_ptr_char id(xmlObject->getXMLID());
- if (!replayCache->check("SAML2Redirect", id.get(), response->getIssueInstant()->getEpoch() + (2*XMLToolingConfig::getConfig().clock_skew_secs))) {
- log.error("replay detected of message ID (%s)", id.get());
- throw BindingException("Rejecting replayed message ID ($1).", params(1,id.get()));
- }
- }
- else
- log.warn("replay cache was not provided, this is a serious security risk!");
-
- issuer = NULL;
- securityMech = false;
- log.debug("attempting to establish issuer and integrity of message...");
-
- // If we can't identify the issuer, we're done, since we can't lookup or verify anything.
- if (!claimedIssuer || !claimedIssuer->getName()) {
- log.warn("unable to establish identity of message issuer");
- return xmlObject.release();
- }
- else if (claimedIssuer->getFormat() && !XMLString::equals(claimedIssuer->getFormat(), NameIDType::ENTITY)) {
- auto_ptr_char iformat(claimedIssuer->getFormat());
- log.warn("message issuer was in an unsupported format (%s)", iformat.get());
- return xmlObject.release();
- }
-
- log.debug("searching metadata for assertion issuer...");
- provider=metadataProvider ? metadataProvider->getEntityDescriptor(claimedIssuer->getName()) : NULL;
- if (provider) {
- log.debug("matched assertion issuer against metadata, searching for applicable role...");
- issuer=provider->getRoleDescriptor(*role, samlconstants::SAML20P_NS);
- if (issuer) {
- /*
- if (trustEngine && signature) {
- if (!trustEngine->validate(*signature, *issuer, metadataProvider->getKeyResolver())) {
- log.error("unable to verify signature on message with supplied trust engine");
- throw BindingException("Message signature failed verification.");
- }
- else {
- securityMech = samlconstants::SAML20P_NS;
- }
- }
- else {
- log.warn("unable to authenticate the message, leaving untrusted");
- }
- */
- }
- else {
- log.warn("unable to find compatible SAML 2.0 role (%s) in metadata", role->toString().c_str());
- }
- if (log.isDebugEnabled()) {
- auto_ptr_char iname(provider->getEntityID());
- log.debug("message from (%s), integrity %sverified", iname.get(), securityMech ? "" : "NOT ");
- }
- }
- else {
- auto_ptr_char temp(claimedIssuer->getName());
- log.warn("no metadata found, can't establish identity of issuer (%s)", temp.get());
- }
+ SchemaValidators.validate(root);
+
+ // Run through the policy.
+ extractMessageDetails(*root, genericRequest, samlconstants::SAML20P_NS, policy);
+ policy.evaluate(*root, &genericRequest);
+
+ // Check destination URL.
+ auto_ptr_char dest(request ? request->getDestination() : response->getDestination());
+ const char* dest2 = httpRequest->getRequestURL();
+ const char* delim = strchr(dest2, '?');
+ if ((root->getSignature() || httpRequest->getParameter("Signature")) && (!dest.get() || !*(dest.get()))) {
+ log.error("signed SAML message missing Destination attribute");
+ throw BindingException("Signed SAML message missing Destination attribute identifying intended destination.");
}
- catch (XMLToolingException& ex) {
- if (!provider) {
- if (!claimedIssuer || !claimedIssuer->getName())
- throw;
- if (!metadataProvider || !(provider=metadataProvider->getEntityDescriptor(claimedIssuer->getName(), false))) {
- // Just record it.
- auto_ptr_char iname(claimedIssuer->getName());
- if (iname.get())
- ex.addProperty("entityID", iname.get());
- throw;
- }
- }
- if (!issuer)
- issuer=provider->getRoleDescriptor(*role, samlconstants::SAML20P_NS);
- if (issuer) annotateException(&ex,issuer); // throws it
- annotateException(&ex,provider); // throws it
+ else if (dest.get() && *dest.get() && ((delim && strncmp(dest.get(), dest2, delim - dest2)) || (!delim && strcmp(dest.get(),dest2)))) {
+ log.error("Redirect targeted at (%s), but delivered to (%s)", dest.get(), dest2);
+ throw BindingException("SAML message delivered with Redirect to incorrect server URL.");
}
return xmlObject.release();
projects / shibboleth / cpp-opensaml.git / blobdiff