/usr/include/wvstreams/wvcountermode.h is in libwvstreams-dev 4.6.1-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | /* -*- Mode: C++ -*-
* Worldvisions Tunnel Vision Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
* A 'counter mode' cryptography engine abstraction.
*/
#ifndef __WVCOUNTERMODE_H
#define __WVCOUNTERMODE_H
#include "wvencoder.h"
/** A counter mode encryption encoder. */
class WvCounterModeEncoder : public WvEncoder
{
public:
WvEncoder *keycrypt;
/**
* Create a new counter mode encoder / decoder.
* _keycrypt : the underlying encoder for generating the keystream
* (note: takes ownership of this encoder)
* _counter : the initial counter value
* _countersize : the counter size, must equal crypto block size
*/
WvCounterModeEncoder(WvEncoder *_keycrypt,
const void *_counter, size_t _countersize);
virtual ~WvCounterModeEncoder();
/**
* Sets the Counter mode auto-incrementing counter.
* counter : the counter
* countersize : the new counter size, must equal crypto block size
*/
void setcounter(const void *counter, size_t countersize);
/**
* Stores the current counter in the supplied buffer.
* counter : the array that receives the counter
*/
void getcounter(void *counter) const;
/** Returns the counter size. */
size_t getcountersize() const
{ return countersize; }
/** Increments the counter. */
virtual void incrcounter();
private:
WvConstInPlaceBuf counterbuf;
protected:
unsigned char *counter; // auto-incrementing counter
size_t countersize; // counter size in bytes
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf, bool flush);
};
#endif // __WVCOUNTERMODE_H
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