mirror of
https://github.com/pocoproject/poco.git
synced 2025-10-25 10:09:36 +02:00
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
//
|
|
// RandomStream.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/RandomStream.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Crypt
|
|
// Module: RandomStream
|
|
//
|
|
// Definition of class RandomInputStream.
|
|
//
|
|
// Copyright (c) 2004-2006, 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 Foundation_RandomStream_INCLUDED
|
|
#define Foundation_RandomStream_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/BufferedStreamBuf.h"
|
|
#include <istream>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class Foundation_API RandomBuf: public BufferedStreamBuf
|
|
/// This streambuf generates random data.
|
|
/// On Windows NT, the cryptographic API is used.
|
|
/// On Unix, /dev/random is used, if available.
|
|
/// Otherwise, a random number generator, some
|
|
/// more-or-less random data and a SHA-1 digest
|
|
/// is used to generate random data.
|
|
{
|
|
public:
|
|
RandomBuf();
|
|
~RandomBuf();
|
|
int readFromDevice(char* buffer, std::streamsize length);
|
|
};
|
|
|
|
|
|
class Foundation_API RandomIOS: public virtual std::ios
|
|
/// The base class for RandomInputStream.
|
|
///
|
|
/// This class is needed to ensure the correct initialization
|
|
/// order of the stream buffer and base classes.
|
|
{
|
|
public:
|
|
RandomIOS();
|
|
~RandomIOS();
|
|
RandomBuf* rdbuf();
|
|
|
|
protected:
|
|
RandomBuf _buf;
|
|
};
|
|
|
|
|
|
class Foundation_API RandomInputStream: public RandomIOS, public std::istream
|
|
/// This istream generates random data
|
|
/// using the RandomBuf.
|
|
{
|
|
public:
|
|
RandomInputStream();
|
|
~RandomInputStream();
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_RandomStream_INCLUDED
|