crypto/cbc-mac.h

   1 /* cbc-mac.h
   2  *
   3  * Cipher block chaining message authentication code.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2003 Simon Josefsson
   9  *
  10  * The nettle library is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or (at your
  13  * option) any later version.
  14  *
  15  * The nettle library is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  17  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  18  * License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  22  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  23  * MA 02111-1307, USA.
  24  */
  25
  26 #ifndef NETTLE_CBC_MAC_H_INCLUDED
  27 #define NETTLE_CBC_MAC_H_INCLUDED
  28
  29 #include "cbc.h"
  30
  31 void
  32 cbc_mac(void *ctx,
  33         void (*f)(void *ctx,
  34                   unsigned length, uint8_t *dst,
  35                   const uint8_t *src),
  36         unsigned block_size, uint8_t *iv,
  37         unsigned length, uint8_t *dst,
  38         const uint8_t *src);
  39
  40 #define CBC_MAC_CTX(type, size) \
  41         CBC_CTX (type, size)
  42
  43 #define CBC_MAC_SET_IV(ctx, data) \
  44         CBC_SET_IV (ctx, data)
  45
  46 #define CBC_MAC(self, f, length, dst, src)                              \
  47   (0 ? ((f)(&(self)->ctx, 0, NULL, NULL))                               \
  48    : cbc_mac((void *) &(self)->ctx,                                     \
  49              (void (*)(void *, unsigned,                                \
  50                        uint8_t *, const uint8_t *)) (f),                \
  51              sizeof((self)->iv), (self)->iv,                            \
  52              (length), (dst), (src)))
  53
  54 #endif /* NETTLE_CBC_MAC_H_INCLUDED */