shibsp/attribute/resolver/impl/ChainingAttributeResolver.cpp

   1 /*
   2  *  Copyright 2001-2007 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  * ChainingAttributeResolver.cpp
  19  *
  20  * Chains together multiple AttributeResolver plugins.
  21  */
  22
  23 #include "internal.h"
  24 #include "Application.h"
  25 #include "ServiceProvider.h"
  26 #include "attribute/Attribute.h"
  27 #include "attribute/resolver/AttributeResolver.h"
  28 #include "attribute/resolver/ResolutionContext.h"
  29
  30 #include <xercesc/util/XMLUniDefs.hpp>
  31 #include <xmltooling/util/XMLHelper.h>
  32
  33 using namespace shibsp;
  34 using namespace opensaml::saml2;
  35 using namespace opensaml::saml2md;
  36 using namespace xmltooling;
  37 using namespace std;
  38
  39 namespace shibsp {
  40
  41     struct SHIBSP_DLLLOCAL ChainingContext : public ResolutionContext
  42     {
  43         ChainingContext(
  44             const Application& application,
  45             const EntityDescriptor* issuer,
  46             const XMLCh* protocol,
  47             const NameID* nameid,
  48             const XMLCh* authncontext_class,
  49             const XMLCh* authncontext_decl,
  50             const vector<const opensaml::Assertion*>* tokens,
  51             const vector<shibsp::Attribute*>* attributes
  52             ) : m_app(application), m_issuer(issuer), m_protocol(protocol), m_authclass(authncontext_class), m_authdecl(authncontext_decl), m_session(NULL) {
  53             if (tokens)
  54                 m_tokens.assign(tokens->begin(), tokens->end());
  55             if (attributes)
  56                 m_attributes.assign(attributes->begin(), attributes->end());
  57         }
  58
  59         ChainingContext(const Application& application, const Session& session) : m_app(application), m_session(&session) {
  60         }
  61
  62         ~ChainingContext() {
  63             for_each(m_ownedAttributes.begin(), m_ownedAttributes.end(), xmltooling::cleanup<shibsp::Attribute>());
  64             for_each(m_ownedAssertions.begin(), m_ownedAssertions.end(), xmltooling::cleanup<opensaml::Assertion>());
  65         }
  66
  67         vector<shibsp::Attribute*>& getResolvedAttributes() {
  68             return m_ownedAttributes;
  69         }
  70         vector<opensaml::Assertion*>& getResolvedAssertions() {
  71             return m_ownedAssertions;
  72         }
  73
  74         vector<shibsp::Attribute*> m_ownedAttributes;
  75         vector<opensaml::Assertion*> m_ownedAssertions;
  76
  77         const Application& m_app;
  78         const EntityDescriptor* m_issuer;
  79         const XMLCh* m_protocol;
  80         const NameID* m_nameid;
  81         const XMLCh* m_authclass;
  82         const XMLCh* m_authdecl;
  83         vector<const opensaml::Assertion*> m_tokens;
  84         vector<shibsp::Attribute*> m_attributes;
  85
  86         const Session* m_session;
  87     };
  88
  89     class SHIBSP_DLLLOCAL ChainingAttributeResolver : public AttributeResolver
  90     {
  91     public:
  92         ChainingAttributeResolver(const DOMElement* e);
  93         virtual ~ChainingAttributeResolver() {
  94             for_each(m_resolvers.begin(), m_resolvers.end(), xmltooling::cleanup<AttributeResolver>());
  95         }
  96
  97         Lockable* lock() {
  98             return this;
  99         }
 100         void unlock() {
 101         }
 102
 103         ResolutionContext* createResolutionContext(
 104             const Application& application,
 105             const EntityDescriptor* issuer,
 106             const XMLCh* protocol,
 107             const NameID* nameid,
 108             const XMLCh* authncontext_class=NULL,
 109             const XMLCh* authncontext_decl=NULL,
 110             const vector<const opensaml::Assertion*>* tokens=NULL,
 111             const vector<shibsp::Attribute*>* attributes=NULL
 112             ) const {
 113             return new ChainingContext(application, issuer, protocol, nameid, authncontext_class, authncontext_decl, tokens, attributes);
 114         }
 115
 116         ResolutionContext* createResolutionContext(const Application& application, const Session& session) const {
 117             return new ChainingContext(application, session);
 118         }
 119
 120         void resolveAttributes(ResolutionContext& ctx) const;
 121
 122         void getAttributeIds(vector<string>& attributes) const {
 123             for (vector<AttributeResolver*>::const_iterator i=m_resolvers.begin(); i!=m_resolvers.end(); ++i) {
 124                 Locker locker(*i);
 125                 (*i)->getAttributeIds(attributes);
 126             }
 127         }
 128
 129     private:
 130         vector<AttributeResolver*> m_resolvers;
 131     };
 132
 133     static const XMLCh _AttributeResolver[] =   UNICODE_LITERAL_17(A,t,t,r,i,b,u,t,e,R,e,s,o,l,v,e,r);
 134     static const XMLCh _type[] =                UNICODE_LITERAL_4(t,y,p,e);
 135
 136     AttributeResolver* SHIBSP_DLLLOCAL ChainingAttributeResolverFactory(const DOMElement* & e)
 137     {
 138         return new ChainingAttributeResolver(e);
 139     }
 140 };
 141
 142 ChainingAttributeResolver::ChainingAttributeResolver(const DOMElement* e)
 143 {
 144     SPConfig& conf = SPConfig::getConfig();
 145
 146     // Load up the chain of handlers.
 147     e = e ? XMLHelper::getFirstChildElement(e, _AttributeResolver) : NULL;
 148     while (e) {
 149         auto_ptr_char type(e->getAttributeNS(NULL,_type));
 150         if (type.get() && *(type.get())) {
 151             try {
 152                 m_resolvers.push_back(conf.AttributeResolverManager.newPlugin(type.get(),e));
 153             }
 154             catch (exception& ex) {
 155                 Category::getInstance(SHIBSP_LOGCAT".AttributeResolver").error(
 156                     "caught exception processing embedded AttributeResolver element: %s", ex.what()
 157                     );
 158             }
 159         }
 160         e = XMLHelper::getNextSiblingElement(e, _AttributeResolver);
 161     }
 162 }
 163
 164 void ChainingAttributeResolver::resolveAttributes(ResolutionContext& ctx) const
 165 {
 166     ChainingContext& chain = dynamic_cast<ChainingContext&>(ctx);
 167     for (vector<AttributeResolver*>::const_iterator i=m_resolvers.begin(); i!=m_resolvers.end(); ++i) {
 168         Locker locker(*i);
 169         auto_ptr<ResolutionContext> context(
 170             chain.m_session ?
 171                 (*i)->createResolutionContext(chain.m_app, *chain.m_session) :
 172                 (*i)->createResolutionContext(
 173                     chain.m_app, chain.m_issuer, chain.m_protocol, chain.m_nameid, chain.m_authclass, chain.m_authdecl, &chain.m_tokens, &chain.m_attributes
 174                     )
 175             );
 176
 177         (*i)->resolveAttributes(*context.get());
 178
 179         chain.m_attributes.insert(chain.m_attributes.end(), context->getResolvedAttributes().begin(), context->getResolvedAttributes().end());
 180         chain.m_ownedAttributes.insert(chain.m_attributes.end(), context->getResolvedAttributes().begin(), context->getResolvedAttributes().end());
 181         context->getResolvedAttributes().clear();
 182
 183         chain.m_tokens.insert(chain.m_tokens.end(), context->getResolvedAssertions().begin(), context->getResolvedAssertions().end());
 184         chain.m_ownedAssertions.insert(chain.m_ownedAssertions.end(), context->getResolvedAssertions().begin(), context->getResolvedAssertions().end());
 185         context->getResolvedAssertions().clear();
 186     }
 187 }