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/* $OpenBSD: blf.h,v 1.6 2002/02/16 21:27:17 millert 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. 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 _PYBC_BLF_H_
#define _PYBC_BLF_H_
#include <sys/types.h>
#if __STDC_VERSION__ >= 199901L /* C99 or later */
#include <stdint.h>
typedef uint8_t u_int8_t;
typedef uint16_t u_int16_t;
typedef uint32_t u_int32_t;
typedef uint64_t u_int64_t;
#elif defined(_WIN32)
typedef unsigned __int8 u_int8_t;
typedef unsigned __int16 u_int16_t;
typedef unsigned __int32 u_int32_t;
#endif
/* 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 */
/* Blowfish context */
typedef struct BlowfishContext {
u_int32_t S[4][256]; /* S-Boxes */
u_int32_t P[BLF_N + 2]; /* Subkeys */
} pybc_blf_ctx;
/* Raw access to customized Blowfish
* blf_key is just:
* Blowfish_initstate( state )
* Blowfish_expand0state( state, key, keylen )
*/
void pybc_Blowfish_initstate(pybc_blf_ctx *);
void pybc_Blowfish_expand0state(pybc_blf_ctx *, const u_int8_t *, u_int16_t);
void pybc_Blowfish_expandstate(pybc_blf_ctx *, const u_int8_t *, u_int16_t,
const u_int8_t *, u_int16_t);
/* Standard Blowfish */
void pybc_blf_enc(pybc_blf_ctx *, u_int32_t *, u_int16_t);
/* Converts u_int8_t to u_int32_t */
u_int32_t pybc_Blowfish_stream2word(const u_int8_t *, u_int16_t, u_int16_t *);
/* KDF interface */
int bcrypt_pbkdf(const char *pass, size_t passlen,
const u_int8_t *salt, size_t saltlen,
u_int8_t *key, size_t keylen, unsigned int rounds);
/* timingsafe_bcmp */
int pybc_timingsafe_bcmp(const void *b1, const void *b2, size_t n);
#endif
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