Raw signature trust support, Redirect binding, "simple" signing rule.
[shibboleth/cpp-opensaml.git] / saml / binding / impl / SecurityPolicy.cpp
1 /*
2  *  Copyright 2001-2006 Internet2
3  * 
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
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
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.
15  */
16
17 /**
18  * SecurityPolicy.cpp
19  * 
20  * Overall policy used to verify the security of an incoming message. 
21  */
22
23 #include "internal.h"
24 #include "exceptions.h"
25 #include "binding/SecurityPolicy.h"
26 #include "saml2/core/Assertions.h"
27
28 using namespace opensaml::saml2md;
29 using namespace opensaml::saml2;
30 using namespace opensaml;
31 using namespace xmltooling;
32 using namespace std;
33
34 namespace opensaml {
35     SAML_DLLLOCAL PluginManager<SecurityPolicyRule,const DOMElement*>::Factory MessageFlowRuleFactory;
36     SAML_DLLLOCAL PluginManager<SecurityPolicyRule,const DOMElement*>::Factory MessageRoutingRuleFactory;
37     SAML_DLLLOCAL PluginManager<SecurityPolicyRule,const DOMElement*>::Factory MessageSigningRuleFactory;
38     SAML_DLLLOCAL PluginManager<SecurityPolicyRule,const DOMElement*>::Factory SimpleSigningRuleFactory;
39 };
40
41 void SAML_API opensaml::registerSecurityPolicyRules()
42 {
43     SAMLConfig& conf=SAMLConfig::getConfig();
44     conf.SecurityPolicyRuleManager.registerFactory(MESSAGEFLOW_POLICY_RULE, MessageFlowRuleFactory);
45     conf.SecurityPolicyRuleManager.registerFactory(MESSAGEROUTING_POLICY_RULE, MessageRoutingRuleFactory);
46     conf.SecurityPolicyRuleManager.registerFactory(MESSAGESIGNING_POLICY_RULE, MessageSigningRuleFactory);
47     conf.SecurityPolicyRuleManager.registerFactory(SIMPLESIGNING_POLICY_RULE, SimpleSigningRuleFactory);
48 }
49
50 SecurityPolicy::~SecurityPolicy()
51 {
52     delete m_issuer;
53 }
54
55 void SecurityPolicy::evaluate(const GenericRequest& request, const XMLObject& message)
56 {
57     for (vector<const SecurityPolicyRule*>::const_iterator i=m_rules.begin(); i!=m_rules.end(); ++i) {
58
59         // Run the rule...
60         pair<Issuer*,const RoleDescriptor*> ident = (*i)->evaluate(request,message,m_metadata,&m_role,m_trust);
61
62         // Make sure returned issuer doesn't conflict.
63          
64         if (ident.first) {
65             if (!issuerMatches(ident.first, m_issuer)) {
66                 delete ident.first;
67                 throw BindingException("Policy rules returned differing Issuers.");
68             }
69             delete m_issuer;
70             m_issuer=ident.first;
71         }
72
73         if (ident.second) {
74             if (m_issuerRole && ident.second!=m_issuerRole)
75                 throw BindingException("Policy rules returned differing issuer RoleDescriptors.");
76             m_issuerRole=ident.second;
77         }
78     }
79 }
80
81 void SecurityPolicy::setIssuer(saml2::Issuer* issuer)
82 {
83     if (!issuerMatches(issuer, m_issuer)) {
84         delete issuer;
85         throw BindingException("Externally provided Issuer conflicts with policy results.");
86     }
87     
88     delete m_issuer;
89     m_issuer=issuer;
90 }
91
92 void SecurityPolicy::setIssuerMetadata(const RoleDescriptor* issuerRole)
93 {
94     if (issuerRole && m_issuerRole && issuerRole!=m_issuerRole)
95         throw BindingException("Externally provided RoleDescriptor conflicts with policy results.");
96     m_issuerRole=issuerRole;
97 }
98
99 bool SecurityPolicy::issuerMatches(const Issuer* issuer1, const Issuer* issuer2) const
100 {
101     // NULL matches anything for the purposes of this interface.
102     if (!issuer1 || !issuer2)
103         return true;
104     
105     const XMLCh* op1=issuer1->getName();
106     const XMLCh* op2=issuer2->getName();
107     if (!op1 || !op2 || !XMLString::equals(op1,op2))
108         return false;
109     
110     op1=issuer1->getFormat();
111     op2=issuer2->getFormat();
112     if (!XMLString::equals(op1 ? op1 : NameIDType::ENTITY, op2 ? op2 : NameIDType::ENTITY))
113         return false;
114         
115     op1=issuer1->getNameQualifier();
116     op2=issuer2->getNameQualifier();
117     if (!XMLString::equals(op1 ? op1 : &chNull, op2 ? op2 : &chNull))
118         return false;
119
120     op1=issuer1->getSPNameQualifier();
121     op2=issuer2->getSPNameQualifier();
122     if (!XMLString::equals(op1 ? op1 : &chNull, op2 ? op2 : &chNull))
123         return false;
124     
125     return true;
126 }