release/src/router/nettle/arctwo.h

   1 /* arctwo.h
   2  *
   3  * The arctwo/rfc2268 block cipher.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2004 Simon Josefsson
   9  * Copyright (C) 2002, 2004 Niels Möller
  10  *
  11  * The nettle library is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU Lesser General Public License as published by
  13  * the Free Software Foundation; either version 2.1 of the License, or (at your
  14  * option) any later version.
  15  *
  16  * The nettle library is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  19  * License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public License
  22  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  23  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  24  * MA 02111-1301, USA.
  25  */
  26
  27 #ifndef NETTLE_ARCTWO_H_INCLUDED
  28 #define NETTLE_ARCTWO_H_INCLUDED
  29
  30 #include "nettle-types.h"
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /* Name mangling */
  37 #define arctwo_set_key nettle_arctwo_set_key
  38 #define arctwo_set_key_ekb nettle_arctwo_set_key_ekb
  39 #define arctwo_encrypt nettle_arctwo_encrypt
  40 #define arctwo_decrypt nettle_arctwo_decrypt
  41 #define arctwo_set_key_gutmann nettle_arctwo_set_key_gutmann
  42
  43 #define ARCTWO_BLOCK_SIZE 8
  44
  45 /* Variable key size from 1 byte to 128 bytes. */
  46 #define ARCTWO_MIN_KEY_SIZE 1
  47 #define ARCTWO_MAX_KEY_SIZE 128
  48
  49 #define ARCTWO_KEY_SIZE 8
  50
  51 struct arctwo_ctx
  52 {
  53   uint16_t S[64];
  54 };
  55
  56 /* Key expansion function that takes the "effective key bits", 1-1024,
  57    as an explicit argument. 0 means maximum key bits. */
  58 void
  59 arctwo_set_key_ekb (struct arctwo_ctx *ctx,
  60                     unsigned length, const uint8_t * key, unsigned ekb);
  61
  62 /* Equvivalent to arctwo_set_key_ekb, with ekb = 8 * length */
  63 void
  64 arctwo_set_key (struct arctwo_ctx *ctx, unsigned length, const uint8_t *key);
  65
  66 /* Equvivalent to arctwo_set_key_ekb, with ekb = 1024 */
  67 void
  68 arctwo_set_key_gutmann (struct arctwo_ctx *ctx,
  69                         unsigned length, const uint8_t *key);
  70
  71 void
  72 arctwo_encrypt (struct arctwo_ctx *ctx,
  73                 unsigned length, uint8_t *dst, const uint8_t *src);
  74 void
  75 arctwo_decrypt (struct arctwo_ctx *ctx,
  76                 unsigned length, uint8_t *dst, const uint8_t *src);
  77
  78 #ifdef __cplusplus
  79 }
  80 #endif
  81
  82 #endif /* NETTLE_ARCTWO_H_INCLUDED */