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OpenSSLInitializer.h

//
// OpenSSLInitializer.h
//
// $Id: //poco/1.3/Crypto/include/Poco/Crypto/OpenSSLInitializer.h#1 $
//
// Library: Crypto
// Package: CryptoCore
// Module:  OpenSSLInitializer
//
// Definition of the OpenSSLInitializer class.
//
// Copyright (c) 2006-2009, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Crypto_OpenSSLInitializer_INCLUDED
#define Crypto_OpenSSLInitializer_INCLUDED


#include "Poco/Crypto/Crypto.h"
#include "Poco/Mutex.h"


extern "C"
{
      struct CRYPTO_dynlock_value
      {
            Poco::FastMutex _mutex;
      };
}


namespace Poco {
namespace Crypto {


00060 class Crypto_API OpenSSLInitializer
      /// Initalizes the OpenSSL library.
      ///
      /// The class ensures the earliest initialization and the
      /// latest shutdown of the OpenSSL library.
{
public:
      OpenSSLInitializer();
            /// Automatically initialize OpenSSL on startup.
            
      ~OpenSSLInitializer();
            /// Automatically shut down OpenSSL on exit.
      
      static void initialize();
            /// Initializes the OpenSSL machinery.

      static void uninitialize();
            /// Shuts down the OpenSSL machinery.

protected:
      enum
      {
            SEEDSIZE = 256
      };
      
      // OpenSSL multithreading support
      static void lock(int mode, int n, const char* file, int line);
      static unsigned long id();
      static struct CRYPTO_dynlock_value* dynlockCreate(const char* file, int line);
      static void dynlock(int mode, struct CRYPTO_dynlock_value* lock, const char* file, int line);
      static void dynlockDestroy(struct CRYPTO_dynlock_value* lock, const char* file, int line);

private:
      static Poco::FastMutex* _mutexes;
      static int _rc;
};


} } // namespace Poco::Crypto


#endif // Crypto_OpenSSLInitializer_INCLUDED

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