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

/* -*- Mode: C++ -*- * Worldvisions Tunnel Vision Software: * Copyright (C) 1997-2002 Net Integration Technologies, Inc. * * Blowfish cryptography abstractions. */ #ifndef __WVBLOWFISH_H #define __WVBLOWFISH_H #include "wvencoder.h" #include "wvencoderstream.h" struct bf_key_st; /** * An encoder implementing the Blowfish encryption method. * * Supports reset(). * */ class WvBlowfishEncoder : public WvEncoder { public: enum Mode { ECBEncrypt, /*!< Encrypt using ECB mode (avoid) */ ECBDecrypt, /*!< Decrypt using ECB mode (avoid) */ CFBEncrypt, /*!< Encrypt using CFB mode (simulates a stream) */ CFBDecrypt /*!< Decrypt using CFB mode (simulates a stream) */ }; /** * Creates a new Blowfish cipher encoder. * * "mode" is the encryption mode * "key" is the initial key * "keysize" is the initial key size in bytes */ WvBlowfishEncoder(Mode mode, const void *key, size_t keysize); virtual ~WvBlowfishEncoder(); /** * Sets the current Blowfish key and resets the initialization * vector to all nulls. * * "key" is the new key * "keysize" is the key size in bytes */ void setkey(const void *key, size_t keysize); /** * Sets the current Blowfish initialization vector. * * "iv" is the new IV must be 8 bytes */ void setiv(const void *iv); /** Return true if mode is encrypting or false if decrypting. */ bool is_encrypting() const { return (mode == ECBEncrypt || mode == CFBEncrypt); } protected: virtual bool _encode(WvBuf &in, WvBuf &out, bool flush); virtual bool _reset(); // supported: restores most recently set // key and initialization vector Mode mode; size_t keysize; unsigned char *key; struct bf_key_st *bfkey; unsigned char ivec[8]; // initialization vector int ivecoff; // current offset into initvec void preparekey(); }; /** * A crypto stream implementing Blowfish encryption. * * By default, written data is encrypted using * WvBlowfishEncoder::CFBEncrypt, read data is decrypted using * WvBlowfishEncoder::CFBDecrypt. * * @see WvBlowfishEncoder */ class WvBlowfishStream : public WvEncoderStream { public: WvBlowfishStream(WvStream *_cloned, const void *key, size_t _keysize, WvBlowfishEncoder::Mode readmode = WvBlowfishEncoder::CFBDecrypt, WvBlowfishEncoder::Mode writemode = WvBlowfishEncoder::CFBEncrypt); virtual ~WvBlowfishStream() { } }; #endif // __WVBLOWFISH_H