diff options
Diffstat (limited to 'plugins/CryptoPP/crypto/factory.h')
| -rw-r--r-- | plugins/CryptoPP/crypto/factory.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/factory.h b/plugins/CryptoPP/crypto/factory.h new file mode 100644 index 0000000000..3c22c1b8f2 --- /dev/null +++ b/plugins/CryptoPP/crypto/factory.h @@ -0,0 +1,128 @@ +#ifndef CRYPTOPP_OBJFACT_H
+#define CRYPTOPP_OBJFACT_H
+
+#include "cryptlib.h"
+#include <map>
+#include <vector>
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+template <class AbstractClass>
+class ObjectFactory
+{
+public:
+ virtual AbstractClass * CreateObject() const =0;
+};
+
+//! _
+template <class AbstractClass, class ConcreteClass>
+class DefaultObjectFactory : public ObjectFactory<AbstractClass>
+{
+public:
+ AbstractClass * CreateObject() const
+ {
+ return new ConcreteClass;
+ }
+
+};
+
+//! _
+template <class AbstractClass, int instance=0>
+class ObjectFactoryRegistry
+{
+public:
+ class FactoryNotFound : public Exception
+ {
+ public:
+ FactoryNotFound(const char *name) : Exception(OTHER_ERROR, std::string("ObjectFactoryRegistry: could not find factory for algorithm ") + name) {}
+ };
+
+ ~ObjectFactoryRegistry()
+ {
+ for (CPP_TYPENAME Map::iterator i = m_map.begin(); i != m_map.end(); ++i)
+ {
+ delete (ObjectFactory<AbstractClass> *)i->second;
+ i->second = NULL;
+ }
+ }
+
+ void RegisterFactory(const std::string &name, ObjectFactory<AbstractClass> *factory)
+ {
+ m_map[name] = factory;
+ }
+
+ const ObjectFactory<AbstractClass> * GetFactory(const char *name) const
+ {
+ CPP_TYPENAME Map::const_iterator i = m_map.find(name);
+ return i == m_map.end() ? NULL : (ObjectFactory<AbstractClass> *)i->second;
+ }
+
+ AbstractClass *CreateObject(const char *name) const
+ {
+ const ObjectFactory<AbstractClass> *factory = GetFactory(name);
+ if (!factory)
+ throw FactoryNotFound(name);
+ return factory->CreateObject();
+ }
+
+ // Return a vector containing the factory names. This is easier than returning an iterator.
+ // from Andrew Pitonyak
+ std::vector<std::string> GetFactoryNames() const
+ {
+ std::vector<std::string> names;
+ CPP_TYPENAME Map::const_iterator iter;
+ for (iter = m_map.begin(); iter != m_map.end(); ++iter)
+ names.push_back(iter->first);
+ return names;
+ }
+
+ CRYPTOPP_NOINLINE static ObjectFactoryRegistry<AbstractClass, instance> & Registry(CRYPTOPP_NOINLINE_DOTDOTDOT);
+
+private:
+ // use void * instead of ObjectFactory<AbstractClass> * to save code size
+ typedef std::map<std::string, void *> Map;
+ Map m_map;
+};
+
+template <class AbstractClass, int instance>
+ObjectFactoryRegistry<AbstractClass, instance> & ObjectFactoryRegistry<AbstractClass, instance>::Registry(CRYPTOPP_NOINLINE_DOTDOTDOT)
+{
+ static ObjectFactoryRegistry<AbstractClass, instance> s_registry;
+ return s_registry;
+}
+
+template <class AbstractClass, class ConcreteClass, int instance = 0>
+struct RegisterDefaultFactoryFor {
+RegisterDefaultFactoryFor(const char *name=NULL)
+{
+ // BCB2006 workaround
+ std::string n = name ? std::string(name) : std::string(ConcreteClass::StaticAlgorithmName());
+ ObjectFactoryRegistry<AbstractClass, instance>::Registry().
+ RegisterFactory(n, new DefaultObjectFactory<AbstractClass, ConcreteClass>);
+}};
+
+template <class SchemeClass>
+void RegisterAsymmetricCipherDefaultFactories(const char *name=NULL, SchemeClass *dummy=NULL)
+{
+ RegisterDefaultFactoryFor<PK_Encryptor, CPP_TYPENAME SchemeClass::Encryptor>((const char *)name);
+ RegisterDefaultFactoryFor<PK_Decryptor, CPP_TYPENAME SchemeClass::Decryptor>((const char *)name);
+}
+
+template <class SchemeClass>
+void RegisterSignatureSchemeDefaultFactories(const char *name=NULL, SchemeClass *dummy=NULL)
+{
+ RegisterDefaultFactoryFor<PK_Signer, CPP_TYPENAME SchemeClass::Signer>((const char *)name);
+ RegisterDefaultFactoryFor<PK_Verifier, CPP_TYPENAME SchemeClass::Verifier>((const char *)name);
+}
+
+template <class SchemeClass>
+void RegisterSymmetricCipherDefaultFactories(const char *name=NULL, SchemeClass *dummy=NULL)
+{
+ RegisterDefaultFactoryFor<SymmetricCipher, CPP_TYPENAME SchemeClass::Encryption, ENCRYPTION>((const char *)name);
+ RegisterDefaultFactoryFor<SymmetricCipher, CPP_TYPENAME SchemeClass::Decryption, DECRYPTION>((const char *)name);
+}
+
+NAMESPACE_END
+
+#endif
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