/usr/include/Poco/Crypto/CryptoStream.h is in libpoco-dev 1.3.6p1-5.1build1.
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// CryptoStream.h
//
// $Id: //poco/1.3/Crypto/include/Poco/Crypto/CryptoStream.h#4 $
//
// Library: Crypto
// Package: Cipher
// Module: CryptoStream
//
// Definition of the CryptoStreamBuf, CryptoInputStream and CryptoOutputStream
// classes.
//
// Copyright (c) 2008, 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_CryptoStream_INCLUDED
#define Crypto_CryptoStream_INCLUDED
#include "Poco/Crypto/Crypto.h"
#include "Poco/BufferedStreamBuf.h"
#include "Poco/Buffer.h"
#include <iostream>
namespace Poco {
namespace Crypto {
class CryptoTransform;
class Cipher;
class Crypto_API CryptoStreamBuf: public Poco::BufferedStreamBuf
/// This stream buffer performs cryptographic transformation on the data
/// going through it.
{
public:
CryptoStreamBuf(std::istream& istr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
CryptoStreamBuf(std::ostream& ostr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
virtual ~CryptoStreamBuf();
void close();
/// Flushes all buffers and finishes the encryption.
protected:
int readFromDevice(char* buffer, std::streamsize length);
int writeToDevice(const char* buffer, std::streamsize length);
private:
CryptoTransform* _pTransform;
std::istream* _pIstr;
std::ostream* _pOstr;
bool _eof;
Poco::Buffer<unsigned char> _buffer;
CryptoStreamBuf(const CryptoStreamBuf&);
CryptoStreamBuf& operator = (const CryptoStreamBuf&);
};
class Crypto_API CryptoIOS: public virtual std::ios
/// The base class for CryptoInputStream and CryptoOutputStream.
///
/// This class is needed to ensure correct initialization order of the
/// stream buffer and base classes.
{
public:
CryptoIOS(std::istream& istr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
CryptoIOS(std::ostream& ostr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
~CryptoIOS();
CryptoStreamBuf* rdbuf();
protected:
CryptoStreamBuf _buf;
};
class Crypto_API CryptoInputStream: public CryptoIOS, public std::istream
/// This stream transforms all data passing through it using the given
/// CryptoTransform.
///
/// Use a CryptoTransform object provided by Cipher::createEncrytor() or
/// Cipher::createDecryptor() to create an encrypting or decrypting stream,
/// respectively.
{
public:
CryptoInputStream(std::istream& istr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
/// Create a new CryptoInputStream object. The CryptoInputStream takes the
/// ownership of the given CryptoTransform object.
CryptoInputStream(std::istream& istr, Cipher& cipher, std::streamsize bufferSize = 8192);
/// Create a new encrypting CryptoInputStream object using the given cipher.
~CryptoInputStream();
/// Destroys the CryptoInputStream.
};
class Crypto_API CryptoOutputStream: public CryptoIOS, public std::ostream
/// This stream transforms all data passing through it using the given
/// CryptoTransform.
///
/// Use a CryptoTransform object provided by Cipher::createEncrytor() or
/// Cipher::createDecryptor() to create an encrypting or decrypting stream,
/// respectively.
///
/// After all data has been passed through the stream, close() must be called
/// to ensure completion of cryptographic transformation.
{
public:
CryptoOutputStream(std::ostream& ostr, CryptoTransform* pTransform, std::streamsize bufferSize = 8192);
/// Create a new CryptoOutputStream object. The CryptoOutputStream takes the
/// ownership of the given CryptoTransform object.
CryptoOutputStream(std::ostream& ostr, Cipher& cipher, std::streamsize bufferSize = 8192);
/// Create a new decrypting CryptoOutputStream object using the given cipher.
~CryptoOutputStream();
/// Destroys the CryptoOutputStream.
void close();
/// Flushes all buffers and finishes the encryption.
};
} } // namespace Poco::Crypto
#endif // Crypto_CryptoStream_INCLUDED
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