http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/wvcountermode.h

/* -*- 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