xmltooling/security/impl/ChainingCredentialResolver.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  * ChainingCredentialResolver.cpp
  19  *
  20  * CredentialResolver with chaining capability.
  21  */
  22
  23 #include "internal.h"
  24 #include "XMLToolingConfig.h"
  25 #include "security/CredentialResolver.h"
  26 #include "util/NDC.h"
  27 #include "util/XMLHelper.h"
  28
  29 #include <log4cpp/Category.hh>
  30 #include <xercesc/util/XMLUniDefs.hpp>
  31
  32 using namespace xmltooling;
  33 using namespace log4cpp;
  34 using namespace std;
  35
  36 namespace xmltooling {
  37     class XMLTOOL_DLLLOCAL ChainingCredentialResolver : public CredentialResolver
  38     {
  39     public:
  40         ChainingCredentialResolver(const DOMElement* e);
  41         virtual ~ChainingCredentialResolver() {
  42             for_each(m_resolvers.begin(), m_resolvers.end(), xmltooling::cleanup<CredentialResolver>());
  43         }
  44
  45         Lockable* lock() {
  46             for_each(m_resolvers.begin(), m_resolvers.end(), mem_fun(&CredentialResolver::lock));
  47             return this;
  48         }
  49         void unlock() {
  50             for_each(m_resolvers.begin(), m_resolvers.end(), mem_fun(&CredentialResolver::unlock));
  51         }
  52
  53         const Credential* resolve(const CredentialCriteria* criteria=NULL) const {
  54             const Credential* cred = NULL;
  55             for (vector<CredentialResolver*>::const_iterator cr = m_resolvers.begin(); !cred && cr!=m_resolvers.end(); ++cr)
  56                 cred = (*cr)->resolve(criteria);
  57             return cred;
  58         }
  59
  60         virtual vector<const Credential*>::size_type resolve(
  61             vector<const Credential*>& results, const CredentialCriteria* criteria=NULL
  62             ) const {
  63             for (vector<CredentialResolver*>::const_iterator cr = m_resolvers.begin(); cr!=m_resolvers.end(); ++cr)
  64                 (*cr)->resolve(results, criteria);
  65             return results.size();
  66         }
  67
  68     private:
  69         vector<CredentialResolver*> m_resolvers;
  70     };
  71
  72     CredentialResolver* XMLTOOL_DLLLOCAL ChainingCredentialResolverFactory(const DOMElement* const & e)
  73     {
  74         return new ChainingCredentialResolver(e);
  75     }
  76
  77     static const XMLCh _CredentialResolver[] =  UNICODE_LITERAL_18(C,r,e,d,e,n,t,i,a,l,R,e,s,o,l,v,e,r);
  78     static const XMLCh _type[] =                UNICODE_LITERAL_4(t,y,p,e);
  79 };
  80
  81 ChainingCredentialResolver::ChainingCredentialResolver(const DOMElement* e)
  82 {
  83 #ifdef _DEBUG
  84     NDC ndc("ChainingCredentialResolver");
  85 #endif
  86
  87     XMLToolingConfig& conf = XMLToolingConfig::getConfig();
  88
  89     // Load up the chain of resolvers.
  90     e = e ? XMLHelper::getFirstChildElement(e, _CredentialResolver) : NULL;
  91     while (e) {
  92         auto_ptr_char type(e->getAttributeNS(NULL,_type));
  93         if (type.get() && *(type.get())) {
  94             try {
  95                 m_resolvers.push_back(conf.CredentialResolverManager.newPlugin(type.get(),e));
  96             }
  97             catch (exception& ex) {
  98                 Category::getInstance(XMLTOOLING_LOGCAT".CredentialResolver.Chaining").error(
  99                     "caught exception processing embedded CredentialResolver element: %s", ex.what()
 100                     );
 101             }
 102         }
 103         e = XMLHelper::getNextSiblingElement(e, _CredentialResolver);
 104     }
 105 }