| /* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk 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 _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 */ |
| |
