include/wvxor.h

   1 /* -*- Mode: C++ -*-
   2  * Worldvisions Tunnel Vision Software:
   3  *   Copyright (C) 1997-2002 Net Integration Technologies, Inc.
   4  *
   5  * XOR cryptography abstractions.
   6  * Could use this to implement short one time pads.
   7  */
   8 #ifndef __WVXOR_H
   9 #define __WVXOR_H
  10
  11 #include "wvencoder.h"
  12 #include "wvencoderstream.h"
  13
  14 /**
  15  * An encoder implementing simple XOR encryption.
  16  * Mainly useful for testing.
  17  */
  18 class WvXOREncoder : public WvEncoder
  19 {
  20 public:
  21     /**
  22      * Creates a new XOR encoder / decoder.
  23      *   _key    : the key
  24      *   _keylen : the length of the key in bytes
  25      */
  26     WvXOREncoder(const void *_key, size_t _keylen);
  27     virtual ~WvXOREncoder();
  28
  29 protected:
  30     bool _encode(WvBuf &in, WvBuf &out, bool flush);
  31
  32 private:
  33     unsigned char *key;
  34     size_t keylen;
  35     int keyoff;
  36 };
  37
  38
  39 /**
  40  * A crypto stream implementing XOR encryption.
  41  * See WvXOREncoder for details.
  42  */
  43 class WvXORStream : public WvEncoderStream
  44 {
  45 public:
  46     WvXORStream(WvStream *_cloned, const void *key, size_t _keysize);
  47     virtual ~WvXORStream() { }
  48 public:
  49     const char *wstype() const { return "WvXORStream"; }
  50 };
  51
  52 #endif /// __WVXOR_H