2 * Copyright 2009 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.
18 * DelegationRestrictionRule.cpp
20 * SAML DelegationRestriction SecurityPolicyRule
24 #include "exceptions.h"
25 #include "binding/SecurityPolicyRule.h"
26 #include "saml2/core/Assertions.h"
27 #include "util/SAMLConstants.h"
30 #include <xercesc/util/XMLUniDefs.hpp>
31 #include <xmltooling/logging.h>
32 #include <xmltooling/XMLToolingConfig.h>
34 using namespace opensaml::saml2;
35 using namespace opensaml;
36 using namespace xmltooling::logging;
37 using namespace xmltooling;
42 class SAML_DLLLOCAL DelegationRestrictionRule : public SecurityPolicyRule
45 DelegationRestrictionRule(const DOMElement* e);
47 virtual ~DelegationRestrictionRule() {
48 for_each(m_delegates.begin(), m_delegates.end(), xmltooling::cleanup<Delegate>());
50 const char* getType() const {
51 return DELEGATION_POLICY_RULE;
53 bool evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
56 vector<Delegate*> m_delegates;
65 SecurityPolicyRule* SAML_DLLLOCAL DelegationRestrictionRuleFactory(const DOMElement* const & e)
67 return new DelegationRestrictionRule(e);
70 class SAML_DLLLOCAL _isSameDelegate : public binary_function<const Delegate*,const Delegate*,bool>,
71 public unary_function<const Delegate*,bool>
73 const Delegate* m_operand;
74 bool isSameFormat(const XMLCh* f1, const XMLCh* f2) const {
76 f1 = NameIDType::UNSPECIFIED;
78 f2 = NameIDType::UNSPECIFIED;
79 return XMLString::equals(f1, f2);
81 bool matches(const NameID* n1, const NameID* n2) const {
82 return (isSameFormat(n1->getFormat(), n2->getFormat()) &&
83 XMLString::equals(n1->getName(), n2->getName()) &&
84 XMLString::equals(n1->getNameQualifier(), n2->getNameQualifier()) &&
85 XMLString::equals(n1->getSPNameQualifier(), n2->getSPNameQualifier()));
88 _isSameDelegate() : m_operand(NULL) {}
89 _isSameDelegate(const Delegate* d) : m_operand(d) {}
91 // d1 is the input from the message, d2 is from the policy
92 bool operator()(const Delegate* d1, const Delegate* d2) const {
93 if (!d1->getNameID()) {
94 Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.DelegationRestriction").error(
95 "rule doesn't support evaluation of BaseID or EncryptedID in a Delegate"
99 if (!d2->getConfirmationMethod() || XMLString::equals(d1->getConfirmationMethod(), d2->getConfirmationMethod())) {
100 return matches(d1->getNameID(), d2->getNameID());
105 // d is from the policy
106 bool operator()(const Delegate* d) const {
107 return this->operator()(m_operand, d);
111 static XMLCh match[] = UNICODE_LITERAL_5(m,a,t,c,h);
112 static XMLCh any[] = UNICODE_LITERAL_8(a,n,y,O,r,d,e,r);
113 static XMLCh newest[] = UNICODE_LITERAL_6(n,e,w,e,s,t);
114 static XMLCh oldest[] = UNICODE_LITERAL_6(o,l,d,e,s,t);
115 static XMLCh maxTimeSinceDelegation[] = UNICODE_LITERAL_22(m,a,x,T,i,m,e,S,i,n,c,e,D,e,l,e,g,a,t,i,o,n);
119 DelegationRestrictionRule::DelegationRestrictionRule(const DOMElement* e) : m_match(MATCH_ANY), m_maxTime(0)
122 const XMLCh* m = e->getAttributeNS(NULL, match);
123 if (XMLString::equals(m, newest))
124 m_match = MATCH_NEWEST;
125 else if (XMLString::equals(m, oldest))
126 m_match = MATCH_OLDEST;
127 else if (m && *m && !XMLString::equals(m, any))
128 throw SecurityPolicyException("Invalid value for \"match\" attribute in Delegation rule.");
129 m = e->getAttributeNS(NULL, maxTimeSinceDelegation);
131 m_maxTime = XMLString::parseInt(m);
134 DOMElement* d = XMLHelper::getFirstChildElement(e, samlconstants::SAML20_DELEGATION_CONDITION_NS, Delegate::LOCAL_NAME);
136 auto_ptr<XMLObject> wrapper(XMLObjectBuilder::buildOneFromElement(d));
137 Delegate* down = dynamic_cast<Delegate*>(wrapper.get());
139 m_delegates.push_back(down);
142 d = XMLHelper::getNextSiblingElement(d, samlconstants::SAML20_DELEGATION_CONDITION_NS, Delegate::LOCAL_NAME);
146 for_each(m_delegates.begin(), m_delegates.end(), xmltooling::cleanup<Delegate>());
152 bool DelegationRestrictionRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
154 const DelegationRestrictionType* drt=dynamic_cast<const DelegationRestrictionType*>(&message);
157 const vector<Delegate*>& dels = drt->getDelegates();
159 if (!m_delegates.empty()) {
160 if (m_match == MATCH_ANY) {
161 // Each Delegate in the condition MUST match an embedded Delegate.
162 for (vector<Delegate*>::const_iterator d1 = dels.begin(); d1 != dels.end(); ++d1) {
163 if (find_if(m_delegates.begin(), m_delegates.end(), _isSameDelegate(*d1)) == m_delegates.end())
167 else if (m_match == MATCH_OLDEST) {
168 if (search(dels.begin(), dels.end(), m_delegates.begin(), m_delegates.end(), _isSameDelegate()) != dels.begin())
171 else if (m_match == MATCH_NEWEST) {
172 if (search(dels.rbegin(), dels.rend(), m_delegates.begin(), m_delegates.end(), _isSameDelegate()) != dels.rbegin())
178 return (!dels.empty() && dels.front()->getDelegationInstant() &&
179 (time(NULL) - dels.front()->getDelegationInstantEpoch() - XMLToolingConfig::getConfig().clock_skew_secs <= m_maxTime));