mirror of git://anongit.mindrot.org/openssh.git
86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/* $OpenBSD: blf.h,v 1.8 2021/11/29 01:04:45 djm Exp $ */
|
|
/*
|
|
* Blowfish - a fast block cipher designed by Bruce Schneier
|
|
*
|
|
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _BLF_H_
|
|
#define _BLF_H_
|
|
|
|
#include "includes.h"
|
|
|
|
#if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H)
|
|
|
|
/* Schneier specifies a maximum key length of 56 bytes.
|
|
* This ensures that every key bit affects every cipher
|
|
* bit. However, the subkeys can hold up to 72 bytes.
|
|
* Warning: For normal blowfish encryption only 56 bytes
|
|
* of the key affect all cipherbits.
|
|
*/
|
|
|
|
#define BLF_N 16 /* Number of Subkeys */
|
|
#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */
|
|
#define BLF_MAXUTILIZED ((BLF_N+2)*4) /* 576 bits */
|
|
|
|
/* Blowfish context */
|
|
typedef struct BlowfishContext {
|
|
u_int32_t S[4][256]; /* S-Boxes */
|
|
u_int32_t P[BLF_N + 2]; /* Subkeys */
|
|
} blf_ctx;
|
|
|
|
/* Raw access to customized Blowfish
|
|
* blf_key is just:
|
|
* Blowfish_initstate( state )
|
|
* Blowfish_expand0state( state, key, keylen )
|
|
*/
|
|
|
|
void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *);
|
|
void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *);
|
|
void Blowfish_initstate(blf_ctx *);
|
|
void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
|
|
void Blowfish_expandstate
|
|
(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
|
|
|
|
/* Standard Blowfish */
|
|
|
|
void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
|
|
void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
|
|
void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
|
|
|
|
void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
|
|
void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
|
|
|
|
void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
|
|
void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
|
|
|
|
/* Converts u_int8_t to u_int32_t */
|
|
u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *);
|
|
|
|
#endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */
|
|
#endif /* _BLF_H */
|
|
|