2 * Copyright 2001-2010 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.
20 * SAML replay and freshness checking SecurityPolicyRule.
24 #include "exceptions.h"
25 #include "binding/SecurityPolicy.h"
26 #include "binding/SecurityPolicyRule.h"
28 #include <xmltooling/logging.h>
29 #include <xmltooling/XMLToolingConfig.h>
30 #include <xmltooling/util/ReplayCache.h>
31 #include <xmltooling/util/XMLHelper.h>
32 #include <xercesc/util/XMLUniDefs.hpp>
34 using namespace opensaml;
35 using namespace xmltooling::logging;
36 using namespace xmltooling;
40 class SAML_DLLLOCAL MessageFlowRule : public SecurityPolicyRule
43 MessageFlowRule(const DOMElement* e);
44 virtual ~MessageFlowRule() {}
46 const char* getType() const {
47 return MESSAGEFLOW_POLICY_RULE;
49 bool evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
56 SecurityPolicyRule* SAML_DLLLOCAL MessageFlowRuleFactory(const DOMElement* const & e)
58 return new MessageFlowRule(e);
62 static const XMLCh checkReplay[] = UNICODE_LITERAL_11(c,h,e,c,k,R,e,p,l,a,y);
63 static const XMLCh expires[] = UNICODE_LITERAL_7(e,x,p,i,r,e,s);
65 MessageFlowRule::MessageFlowRule(const DOMElement* e)
66 : m_checkReplay(XMLHelper::getAttrBool(e, true, checkReplay)),
67 m_expires(XMLHelper::getAttrInt(e, XMLToolingConfig::getConfig().clock_skew_secs, expires))
71 bool MessageFlowRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
73 Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.MessageFlow");
74 log.debug("evaluating message flow policy (replay checking %s, expiration %lu)", m_checkReplay ? "on" : "off", m_expires);
76 time_t now = policy.getTime();
77 time_t skew = XMLToolingConfig::getConfig().clock_skew_secs;
78 time_t issueInstant = policy.getIssueInstant();
79 if (issueInstant == 0) {
83 if (issueInstant > now + skew) {
84 log.errorStream() << "rejected not-yet-valid message, timestamp (" << issueInstant <<
85 "), newest allowed (" << now + skew << ")" << logging::eol;
86 throw SecurityPolicyException("Message rejected, was issued in the future.");
88 else if (issueInstant < now - skew - m_expires) {
89 log.errorStream() << "rejected expired message, timestamp (" << issueInstant <<
90 "), oldest allowed (" << (now - skew - m_expires) << ")" << logging::eol;
91 throw SecurityPolicyException("Message expired, was issued too long ago.");
97 const XMLCh* id = policy.getMessageID();
101 ReplayCache* replayCache = XMLToolingConfig::getConfig().getReplayCache();
103 log.warn("no ReplayCache available, skipping requested replay check");
107 auto_ptr_char temp(id);
108 if (!replayCache->check("MessageFlow", temp.get(), issueInstant + skew + m_expires)) {
109 log.error("replay detected of message ID (%s)", temp.get());
110 throw SecurityPolicyException("Rejecting replayed message ID ($1).", params(1,temp.get()));