release/src/router/nettle/ctr.h

   1 /* ctr.h
   2  *
   3  * Counter mode, using an network byte order incremented counter,
   4  * matching the testcases of NIST 800-38A.
   5  */
   6
   7 /* nettle, low-level cryptographics library
   8  *
   9  * Copyright (C) 2005 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_CTR_H_INCLUDED
  28 #define NETTLE_CTR_H_INCLUDED
  29
  30 #include "nettle-types.h"
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /* Name mangling */
  37 #define ctr_crypt nettle_ctr_crypt
  38
  39 void
  40 ctr_crypt(void *ctx, nettle_crypt_func *f,
  41           unsigned block_size, uint8_t *ctr,
  42           unsigned length, uint8_t *dst,
  43           const uint8_t *src);
  44
  45 #define CTR_CTX(type, size) \
  46 { type ctx; uint8_t ctr[size]; }
  47
  48 #define CTR_SET_COUNTER(ctx, data) \
  49 memcpy((ctx)->ctr, (data), sizeof((ctx)->ctr))
  50
  51 #define CTR_CRYPT(self, f, length, dst, src)            \
  52 (0 ? ((f)(&(self)->ctx, 0, NULL, NULL))                 \
  53    : ctr_crypt((void *) &(self)->ctx,                   \
  54                (nettle_crypt_func *) (f),               \
  55                sizeof((self)->ctr), (self)->ctr,        \
  56                (length), (dst), (src)))
  57
  58 #ifdef __cplusplus
  59 }
  60 #endif
  61
  62 #endif /* NETTLE_CTR_H_INCLUDED */