/*
- * Copyright 2001-2006 Internet2
+ * Copyright 2001-2007 Internet2
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "internal.h"
#include "exceptions.h"
-#include "binding/HTTPRequest.h"
-#include "binding/SimpleSigningRule.h"
+#include "binding/SecurityPolicyRule.h"
+#include "saml2/core/Assertions.h"
#include "saml2/metadata/Metadata.h"
+#include "saml2/metadata/MetadataCredentialCriteria.h"
#include "saml2/metadata/MetadataProvider.h"
-#include "security/TrustEngine.h"
-#include <log4cpp/Category.hh>
-#include <xmltooling/util/NDC.h>
-#include <xmltooling/util/ReplayCache.h>
-#include <xsec/enc/XSECCryptoException.hpp>
-#include <xsec/enc/XSECCryptoProvider.hpp>
-#include <xsec/framework/XSECException.hpp>
+#include <xercesc/util/Base64.hpp>
+#include <xmltooling/logging.h>
+#include <xmltooling/io/HTTPRequest.h>
+#include <xmltooling/security/SignatureTrustEngine.h>
using namespace opensaml::saml2md;
using namespace opensaml;
+using namespace xmltooling::logging;
using namespace xmltooling;
-using namespace log4cpp;
using namespace std;
using xmlsignature::KeyInfo;
+using xmlsignature::SignatureException;
namespace opensaml {
+ class SAML_DLLLOCAL SimpleSigningRule : public SecurityPolicyRule
+ {
+ public:
+ SimpleSigningRule(const DOMElement* e);
+ virtual ~SimpleSigningRule() {}
+
+ void evaluate(const xmltooling::XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
+
+ private:
+ // Appends a raw parameter=value pair to the string.
+ static bool appendParameter(string& s, const char* data, const char* name);
+
+ bool m_errorsFatal;
+ };
+
SecurityPolicyRule* SAML_DLLLOCAL SimpleSigningRuleFactory(const DOMElement* const & e)
{
return new SimpleSigningRule(e);
}
- // Appends a raw parameter=value pair to the string.
- static bool appendParameter(string& s, const char* data, const char* name)
- {
- const char* start = strstr(data,name);
- if (!start)
- return false;
- if (!s.empty())
- s += '&';
- const char* end = strchr(start,'&');
- if (end)
- s.append(start, end-start);
- else
- s.append(start);
- return true;
- }
+ static const XMLCh errorsFatal[] = UNICODE_LITERAL_11(e,r,r,o,r,s,F,a,t,a,l);
};
+bool SimpleSigningRule::appendParameter(string& s, const char* data, const char* name)
+{
+ const char* start = strstr(data,name);
+ if (!start)
+ return false;
+ if (!s.empty())
+ s += '&';
+ const char* end = strchr(start,'&');
+ if (end)
+ s.append(start, end-start);
+ else
+ s.append(start);
+ return true;
+}
-pair<saml2::Issuer*,const RoleDescriptor*> SimpleSigningRule::evaluate(
- const GenericRequest& request,
- const XMLObject& message,
- const MetadataProvider* metadataProvider,
- const QName* role,
- const opensaml::TrustEngine* trustEngine,
- const MessageExtractor& extractor
- ) const
+SimpleSigningRule::SimpleSigningRule(const DOMElement* e) : m_errorsFatal(false)
+{
+ if (e) {
+ const XMLCh* flag = e->getAttributeNS(NULL, errorsFatal);
+ m_errorsFatal = (flag && (*flag==chLatin_t || *flag==chDigit_1));
+ }
+}
+
+void SimpleSigningRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
{
Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.SimpleSigning");
- log.debug("evaluating simple signing policy");
-
- pair<saml2::Issuer*,const RoleDescriptor*> ret = pair<saml2::Issuer*,const RoleDescriptor*>(NULL,NULL);
- if (!metadataProvider || !role || !trustEngine) {
- log.debug("ignoring message, no metadata supplied");
- return ret;
+ if (!policy.getIssuerMetadata()) {
+ log.debug("ignoring message, no issuer metadata supplied");
+ return;
}
-
- const char* signature = request.getParameter("Signature");
- if (!signature) {
- log.debug("ignoring unsigned message");
- return ret;
+
+ const SignatureTrustEngine* sigtrust;
+ if (!(sigtrust=dynamic_cast<const SignatureTrustEngine*>(policy.getTrustEngine()))) {
+ log.debug("ignoring message, no SignatureTrustEngine supplied");
+ return;
}
+
+ const HTTPRequest* httpRequest = dynamic_cast<const HTTPRequest*>(request);
+ if (!request || !httpRequest)
+ return;
+
+ const char* signature = request->getParameter("Signature");
+ if (!signature)
+ return;
- const char* sigAlgorithm = request.getParameter("SigAlg");
+ const char* sigAlgorithm = request->getParameter("SigAlg");
if (!sigAlgorithm) {
log.error("SigAlg parameter not found, no way to verify the signature");
- return ret;
+ return;
}
- 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;
- }
+ string input;
+ const char* pch;
+ if (!strcmp(httpRequest->getMethod(), "GET")) {
+ // We have to construct a string containing the signature input by accessing the
+ // request directly. We can't use the decoded parameters because we need the raw
+ // data and URL-encoding isn't canonical.
- 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;
- }
+ // NOTE: SimpleSign for GET means Redirect binding, which means we verify over the
+ // base64-encoded message directly.
- string input;
- const char* pch;
- const HTTPRequest& httpRequest = dynamic_cast<const HTTPRequest&>(request);
- if (!strcmp(httpRequest.getMethod(), "GET")) {
- // We have to construct a string containing the signature input by accessing the
- // request directly. We can't use the decoded parameters because we need the raw
- // data and URL-encoding isn't canonical.
- pch = httpRequest.getQueryString();
- if (!appendParameter(input, pch, "SAMLRequest="))
- appendParameter(input, pch, "SAMLResponse=");
- appendParameter(input, pch, "RelayState=");
- appendParameter(input, pch, "SigAlg=");
- }
- else {
- // With POST, the input string is concatenated from the decoded form controls.
- // GET should be this way too, but I messed up the spec, sorry.
- pch = httpRequest.getParameter("SAMLRequest");
- if (pch)
- input = string("SAMLRequest=") + pch;
- else {
- pch = httpRequest.getParameter("SAMLResponse");
- input = string("SAMLResponse=") + pch;
- }
- pch = httpRequest.getParameter("RelayState");
- if (pch)
- input = input + "&RelayState=" + pch;
- input = input + "&SigAlg=" + sigAlgorithm;
- }
+ pch = httpRequest->getQueryString();
+ if (!appendParameter(input, pch, "SAMLRequest="))
+ appendParameter(input, pch, "SAMLResponse=");
+ appendParameter(input, pch, "RelayState=");
+ appendParameter(input, pch, "SigAlg=");
+ }
+ else {
+ // With POST, the input string is concatenated from the decoded form controls.
+ // GET should be this way too, but I messed up the spec, sorry.
+
+ // NOTE: SimpleSign for POST means POST binding, which means we verify over the
+ // base64-decoded XML. This sucks, because we have to decode the base64 directly.
+ // Serializing the XMLObject doesn't guarantee the signature will verify (this is
+ // why XMLSignature exists, and why this isn't really "simpler").
- // Check for KeyInfo, but defensively (we might be able to run without it).
- KeyInfo* keyInfo=NULL;
- pch = request.getParameter("KeyInfo");
+ unsigned int x;
+ pch = httpRequest->getParameter("SAMLRequest");
if (pch) {
- try {
- istringstream kstrm(pch);
- DOMDocument* doc = XMLToolingConfig::getConfig().getParser().parse(kstrm);
- XercesJanitor<DOMDocument> janitor(doc);
- XMLObject* kxml = XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true);
- janitor.release();
- if (!(keyInfo=dynamic_cast<KeyInfo*>(kxml)))
- delete kxml;
- }
- catch (XMLToolingException& ex) {
- log.warn("Failed to load KeyInfo from message: %s", ex.what());
+ XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(pch),&x);
+ if (!decoded) {
+ log.warn("unable to decode base64 in POST binding message");
+ return;
}
+ input = string("SAMLRequest=") + reinterpret_cast<const char*>(decoded);
+ XMLString::release(&decoded);
}
-
- auto_ptr<KeyInfo> kjanitor(keyInfo);
- auto_ptr_XMLCh alg(sigAlgorithm);
-
- if (!trustEngine->validate(alg.get(), signature, keyInfo, input.c_str(), input.length(), *roledesc, metadataProvider->getKeyResolver())) {
- log.error("unable to verify signature on message with supplied trust engine");
- return ret;
+ else {
+ pch = httpRequest->getParameter("SAMLResponse");
+ XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(pch),&x);
+ if (!decoded) {
+ log.warn("unable to decode base64 in POST binding message");
+ return;
+ }
+ input = string("SAMLResponse=") + reinterpret_cast<const char*>(decoded);
+ XMLString::release(&decoded);
}
- if (log.isDebugEnabled()) {
- auto_ptr_char iname(entity->getEntityID());
- log.debug("message from (%s), signature verified", iname.get());
+ pch = httpRequest->getParameter("RelayState");
+ if (pch)
+ input = input + "&RelayState=" + pch;
+ input = input + "&SigAlg=" + sigAlgorithm;
+ }
+
+ // Check for KeyInfo, but defensively (we might be able to run without it).
+ KeyInfo* keyInfo=NULL;
+ pch = request->getParameter("KeyInfo");
+ if (pch) {
+ try {
+ istringstream kstrm(pch);
+ DOMDocument* doc = XMLToolingConfig::getConfig().getParser().parse(kstrm);
+ XercesJanitor<DOMDocument> janitor(doc);
+ XMLObject* kxml = XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true);
+ janitor.release();
+ if (!(keyInfo=dynamic_cast<KeyInfo*>(kxml)))
+ delete kxml;
+ }
+ catch (XMLToolingException& ex) {
+ log.warn("Failed to load KeyInfo from message: %s", ex.what());
}
-
- ret.first = issuer.release();
- ret.second = roledesc;
}
- catch (bad_cast&) {
- // Just trap it.
- log.warn("caught a bad_cast while extracting issuer");
+
+ auto_ptr<KeyInfo> kjanitor(keyInfo);
+ auto_ptr_XMLCh alg(sigAlgorithm);
+
+ // Set up criteria object.
+ MetadataCredentialCriteria cc(*(policy.getIssuerMetadata()));
+ cc.setXMLAlgorithm(alg.get());
+
+ if (!sigtrust->validate(alg.get(), signature, keyInfo, input.c_str(), input.length(), *(policy.getMetadataProvider()), &cc)) {
+ log.error("unable to verify message signature with supplied trust engine");
+ if (m_errorsFatal)
+ throw SignatureException("Message was signed, but signature could not be verified.");
+ return;
}
- return ret;
+
+ log.debug("signature verified against message issuer");
+ policy.setSecure(true);
}
projects / shibboleth / opensaml2.git / blobdiff