bsd/crypto/rc5/rc5.h

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef _RFC2040_RC5_H_
  31 #define _RFC2040_RC5_H_
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/mbuf.h>
  36
  37 /*
  38  * if RC5_WORD change, W also may be changed.
  39  */
  40 typedef u_int32_t       RC5_WORD;
  41
  42 #define W               (32)
  43 #define WW              (W / 8)
  44 #define ROT_MASK        (W - 1)
  45 #define BB              ((2 * W) / 8)
  46
  47 #define SHLL(x, s)      ((RC5_WORD)((x) << ((s)&ROT_MASK)))
  48 #define SHLR(x, s, w)   ((RC5_WORD)((x) >> ((w)-((s)&ROT_MASK))))
  49 #define SHRL(x, s, w)   ((RC5_WORD)((x) << ((w)-((s)&ROT_MASK))))
  50 #define SHRR(x, s)      ((RC5_WORD)((x) >> ((s)&ROT_MASK)))
  51
  52 #define ROTL(x, s, w)   ((RC5_WORD)(SHLL((x), (s))|SHLR((x), (s), (w))))
  53 #define ROTR(x, s, w)   ((RC5_WORD)(SHRL((x), (s), (w))|SHRR((x), (s))))
  54
  55 #define P16     0xb7e1
  56 #define Q16     0x9e37
  57 #define P32     0xb7e15163
  58 #define Q32     0x9e3779b9
  59 #define P64     0xb7e151628aed2a6b
  60 #define Q64     0x9e3779b97f4a7c15
  61
  62 #if W == 16
  63 #define Pw      P16
  64 #define Qw      Q16
  65 #elif W == 32
  66 #define Pw      P32
  67 #define Qw      Q32
  68 #elif W == 64
  69 #define Pw      P64
  70 #define Qw      Q64
  71 #endif
  72
  73 #define RC5_ENCRYPT     1
  74 #define RC5_DECRYPT     0
  75
  76 extern void set_rc5_expandkey __P((RC5_WORD *, u_int8_t *, size_t, int));
  77 extern void rc5_encrypt_round16 __P((u_int8_t *, const u_int8_t *,
  78                                 const RC5_WORD *));
  79 extern void rc5_decrypt_round16 __P((u_int8_t *, const u_int8_t *,
  80                                 const RC5_WORD *));
  81 extern void rc5_cbc_process __P((struct mbuf *, size_t, size_t, RC5_WORD *,
  82                                 u_int8_t *, int));
  83
  84 #endif