/usr/include/wvstreams/wvtripledes.h is in libwvstreams-dev 4.6.1-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | /* -*- 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
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