| 1 | /* |
| 2 | * This file is part of ipif, part of userv-utils |
| 3 | * |
| 4 | * Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk> |
| 5 | * Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk> |
| 6 | * Copyright 1999,2003 |
| 7 | * Chancellor Masters and Scholars of the University of Cambridge |
| 8 | * Copyright 2010 Tony Finch <fanf@dotat.at> |
| 9 | * |
| 10 | * This is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 3 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with userv-utils; if not, see http://www.gnu.org/licenses/. |
| 22 | */ |
| 23 | |
| 24 | #ifndef BLOWFISH__H_INCLUDED |
| 25 | #define BLOWFISH__H_INCLUDED |
| 26 | |
| 27 | #include <stdint.h> |
| 28 | |
| 29 | #define BLOWFISH_BLOCKBYTES 8 |
| 30 | #define BLOWFISH_MAXKEYBYTES 56 |
| 31 | #define BLOWFISH__N 16 |
| 32 | #define BLOWFISH__PSIZE BLOWFISH__N+2 |
| 33 | |
| 34 | typedef uint32_t blowfish__p[BLOWFISH__PSIZE]; |
| 35 | typedef uint32_t blowfish__s[4][256]; |
| 36 | |
| 37 | struct blowfish_expandedkey { |
| 38 | blowfish__p p; |
| 39 | blowfish__s s; |
| 40 | }; |
| 41 | |
| 42 | /* It's ok to pass the [_cbc]_(en|de)crypt functions the same |
| 43 | * input and output pointers. |
| 44 | */ |
| 45 | |
| 46 | void blowfish_loadkey(struct blowfish_expandedkey *ek, |
| 47 | const uint8_t *key, int keybytes); |
| 48 | void blowfish_encrypt(const struct blowfish_expandedkey *ek, |
| 49 | const uint8_t plain[BLOWFISH_BLOCKBYTES], |
| 50 | uint8_t cipher[BLOWFISH_BLOCKBYTES]); |
| 51 | void blowfish_decrypt(const struct blowfish_expandedkey *ek, |
| 52 | const uint8_t cipher[BLOWFISH_BLOCKBYTES], |
| 53 | uint8_t plain[BLOWFISH_BLOCKBYTES]); |
| 54 | |
| 55 | struct blowfish_cbc_state { |
| 56 | struct blowfish_expandedkey ek; |
| 57 | uint32_t chainl, chainr; |
| 58 | }; |
| 59 | |
| 60 | void blowfish_cbc_setiv(struct blowfish_cbc_state *cs, |
| 61 | const uint8_t iv[BLOWFISH_BLOCKBYTES]); |
| 62 | void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs, |
| 63 | const uint8_t plain[BLOWFISH_BLOCKBYTES], |
| 64 | uint8_t cipher[BLOWFISH_BLOCKBYTES]); |
| 65 | void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs, |
| 66 | const uint8_t cipher[BLOWFISH_BLOCKBYTES], |
| 67 | uint8_t plain[BLOWFISH_BLOCKBYTES]); |
| 68 | |
| 69 | #endif |