git.distorted.org.uk Git - u/mdw/catacomb/blob - rc5.h

   1 /* -*-c-*-
   2  *
   3  * $Id: rc5.h,v 1.2 1999/12/10 23:29:48 mdw Exp $
   4  *
   5  * The RC5-32/12 block cipher
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: rc5.h,v $
  33  * Revision 1.2  1999/12/10 23:29:48  mdw
  34  * Change header file guard names.
  35  *
  36  * Revision 1.1  1999/09/03 08:41:12  mdw
  37  * Initial import.
  38  *
  39  */
  40
  41 #ifndef CATACOMB_RC5_H
  42 #define CATACOMB_RC5_H
  43
  44 #ifdef __cplusplus
  45   extern "C" {
  46 #endif
  47
  48 /*----- Header files ------------------------------------------------------*/
  49
  50 #include <mLib/bits.h>
  51
  52 /*----- Magic numbers -----------------------------------------------------*/
  53
  54 #define RC5_ROUNDS 12
  55 #define RC5_KEYSZ 0
  56 #define RC5_BLKSZ 8
  57 #define RC5_CLASS (N, L, 64)
  58
  59 /*----- Data structures ---------------------------------------------------*/
  60
  61 typedef struct rc5_ctx {
  62   uint32 s[2 * (RC5_ROUNDS + 1)];
  63 } rc5_ctx;
  64
  65 /*----- Functions provided ------------------------------------------------*/
  66
  67 /* --- @rc5_init@ --- *
  68  *
  69  * Arguments:   @rc5_ctx *k@ = pointer to a key block
  70  *              @const void *sbuf@ = pointer to key material
  71  *              @size_t sz@ = size of the key material
  72  *
  73  * Returns:     ---
  74  *
  75  * Use:         Initializes an RC5 key block.
  76  */
  77
  78 extern void rc5_init(rc5_ctx */*k*/, const void */*sbuf*/, size_t /*sz*/);
  79
  80 /* --- @rc5_eblk@, @rc5_dblk@ --- *
  81  *
  82  * Arguments:   @const rc5_ctx *k@ = pointer to RC5 context block
  83  *              @const uint32 s[2]@ = pointer to source block
  84  *              @uint32 *d[2]@ = pointer to destination block
  85  *
  86  * Returns:     ---
  87  *
  88  * Use:         Low level block encryption and decryption.
  89  */
  90
  91 extern void rc5_eblk(const rc5_ctx */*k*/,
  92                      const uint32 */*s*/, uint32 */*d*/);
  93 extern void rc5_dblk(const rc5_ctx */*k*/,
  94                      const uint32 */*s*/, uint32 */*d*/);
  95
  96 /*----- That's all, folks -------------------------------------------------*/
  97
  98 #ifdef __cplusplus
  99   }
 100 #endif
 101
 102 #endif