crypto/cbc-cts.h

   1 /* cbc-cts.h
   2  *
   3  * Cipher block chaining mode, with cipher text stealing.
   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_CTS_H_INCLUDED
  27 #define NETTLE_CBC_CTS_H_INCLUDED
  28
  29 #include "cbc.h"
  30
  31 void
  32 cbc_cts_encrypt(void *ctx, void (*f)(void *ctx,
  33                                      unsigned length, uint8_t *dst,
  34                                      const uint8_t *src),
  35                 unsigned block_size, uint8_t *iv,
  36                 unsigned length, uint8_t *dst,
  37                 const uint8_t *src);
  38
  39 void
  40 cbc_cts_decrypt(void *ctx, void (*f)(void *ctx,
  41                                      unsigned length, uint8_t *dst,
  42                                      const uint8_t *src),
  43                 unsigned block_size, uint8_t *iv,
  44                 unsigned length, uint8_t *dst,
  45                 const uint8_t *src);
  46
  47 #define CBC_CTS_CTX(type, size) CBC_CTX(type, size)
  48
  49 #define CBC_CTS_SET_IV(ctx, data) CBC_SET_IV(ctx, data)
  50
  51 #define CBC_CTS_ENCRYPT(self, f, length, dst, src)                      \
  52   (0 ? ((f)(&(self)->ctx, 0, NULL, NULL))                               \
  53    : cbc_cts_encrypt((void *) &(self)->ctx,                             \
  54                      (void (*)(void *, unsigned,                        \
  55                                uint8_t *, const uint8_t *)) (f),        \
  56                      sizeof((self)->iv), (self)->iv,                    \
  57                      (length), (dst), (src)))
  58
  59 #define CBC_CTS_DECRYPT(self, f, length, dst, src)                      \
  60   (0 ? ((f)(&(self)->ctx, 0, NULL, NULL))                               \
  61    : cbc_cts_decrypt((void *) &(self)->ctx,                             \
  62                      (void (*)(void *, unsigned,                        \
  63                                uint8_t *, const uint8_t *)) (f),        \
  64                      sizeof((self)->iv), (self)->iv,                    \
  65                      (length), (dst), (src)))
  66
  67 #endif /* NETTLE_CBC_CTS_H_INCLUDED */