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

/* -*- Mode: C++ -*- * Worldvisions Tunnel Vision Software: * Copyright (C) 1997-2003 Net Integration Technologies, Inc. * * TripleDES cryptography abstractions. */ #ifndef __WVTRIPLEDES_H #define __WVTRIPLEDES_H #include "wvencoder.h" #include "wvencoderstream.h" #include "wvcrypto.h" #include <openssl/des.h> /** * An encoder implementing the TripleDES encryption method. * * Supports reset(). * */ class WvTripleDESEncoder : public WvCryptoEncoder { 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) */ CBCEncrypt, /*!< Encrypt using CBC mode */ CBCDecrypt /*!< Decrypt using CBC mode */ }; /* * Creates a new TripleDES cipher encoder. * * "mode" is the encryption mode * "key[1-3]" are the initial keys */ WvTripleDESEncoder(Mode mode, const void *key1, const void *key2, const void *key3); /* virtual ~WvTripleDESEncoder(); */ /* * Sets the current TripleDES keys and resets the initialization * vector to all nulls. * * "key[1-3]" are the new keys */ virtual void setkey(const void *key) { setkey(key, (unsigned char*)key+DES_KEY_SZ, (unsigned char *)key+(DES_KEY_SZ*2)); return; } virtual void setkey(const void *_key1, const void *_key2, const void *_key3); /* * Sets the current TripleDES initialization vector. * * "iv" is the new IV must be 8 bytes */ virtual void setiv(const void *iv); protected: virtual bool _encode(WvBuf &in, WvBuf &out, bool flush); virtual bool _reset(); // supported: restores most recently set // key and initialization vector private: Mode mode; des_cblock key; des_key_schedule deskey1; des_key_schedule deskey2; des_key_schedule deskey3; des_cblock ivec; // initialization vector int ivecoff; // current offset into initvec }; /** * A crypto stream implementing TripleDES encryption. * * By default, written data is encrypted using * WvTripleDESEncoder::CFBEncrypt, read data is decrypted using * WvTripleDESEncoder::CFBDecrypt. * * @see WvTripleDESEncoder */ class WvTripleDESStream : public WvEncoderStream { public: WvTripleDESStream(WvStream *_cloned, const void *_key1, const void *_key2, const void *_key3, WvTripleDESEncoder::Mode readmode = WvTripleDESEncoder::CFBDecrypt, WvTripleDESEncoder::Mode writemode = WvTripleDESEncoder::CFBEncrypt); virtual ~WvTripleDESStream() { } }; #endif // __WVTRIPLEDES_H