mdw@git.distorted.org.uk Git - userv-utils/blob - ipif/blowfish.h

   1 /*
   2  * Copyright (C) 1997,2000,2003 Ian Jackson
   3  * This file is part of ipif, part of userv-utils
   4  *
   5  * This is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with userv-utils; if not, write to the Free Software
  17  * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifndef BLOWFISH__H_INCLUDED
  21 #define BLOWFISH__H_INCLUDED
  22
  23 #include <stdint.h>
  24
  25 #define BLOWFISH_BLOCKBYTES 8
  26 #define BLOWFISH_MAXKEYBYTES 56
  27 #define BLOWFISH__N 16
  28 #define BLOWFISH__PSIZE BLOWFISH__N+2
  29
  30 typedef uint32_t blowfish__p[BLOWFISH__PSIZE];
  31 typedef uint32_t blowfish__s[4][256];
  32
  33 struct blowfish_expandedkey {
  34   blowfish__p p;
  35   blowfish__s s;
  36 };
  37
  38 /* It's ok to pass the [_cbc]_(en|de)crypt functions the same
  39  * input and output pointers.
  40  */
  41
  42 void blowfish_loadkey(struct blowfish_expandedkey *ek,
  43                       const uint8_t *key, int keybytes);
  44 void blowfish_encrypt(const struct blowfish_expandedkey *ek,
  45                       const uint8_t plain[BLOWFISH_BLOCKBYTES],
  46                       uint8_t cipher[BLOWFISH_BLOCKBYTES]);
  47 void blowfish_decrypt(const struct blowfish_expandedkey *ek,
  48                       const uint8_t cipher[BLOWFISH_BLOCKBYTES],
  49                       uint8_t plain[BLOWFISH_BLOCKBYTES]);
  50
  51 struct blowfish_cbc_state {
  52   struct blowfish_expandedkey ek;
  53   uint32_t chainl, chainr;
  54 };
  55
  56 void blowfish_cbc_setiv(struct blowfish_cbc_state *cs,
  57                         const uint8_t iv[BLOWFISH_BLOCKBYTES]);
  58 void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs,
  59                           const uint8_t plain[BLOWFISH_BLOCKBYTES],
  60                           uint8_t cipher[BLOWFISH_BLOCKBYTES]);
  61 void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs,
  62                           const uint8_t cipher[BLOWFISH_BLOCKBYTES],
  63                           uint8_t plain[BLOWFISH_BLOCKBYTES]);
  64
  65 #endif