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