reactos/include/reactos/libs/gnutls/nettle/arcfour.h

   1 /* arcfour.h
   2  *
   3  * The arcfour/rc4 stream cipher.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2001 Niels Möller
   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., 51 Franklin Street, Fifth Floor, Boston,
  23  * MA 02111-1301, USA.
  24  */
  25
  26 #ifndef NETTLE_ARCFOUR_H_INCLUDED
  27 #define NETTLE_ARCFOUR_H_INCLUDED
  28
  29 #include "nettle-types.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /* Name mangling */
  36 #define arcfour_set_key nettle_arcfour_set_key
  37 #define arcfour_crypt nettle_arcfour_crypt
  38
  39 /* Minimum and maximum keysizes, and a reasonable default. In
  40  * octets.*/
  41 #define ARCFOUR_MIN_KEY_SIZE 1
  42 #define ARCFOUR_MAX_KEY_SIZE 256
  43 #define ARCFOUR_KEY_SIZE 16
  44
  45         struct arcfour_ctx {
  46                 uint8_t S[256];
  47                 uint8_t i;
  48                 uint8_t j;
  49         };
  50
  51         void
  52          arcfour_set_key(struct arcfour_ctx *ctx,
  53                          unsigned length, const uint8_t * key);
  54
  55         void
  56          arcfour_crypt(struct arcfour_ctx *ctx,
  57                        unsigned length, uint8_t * dst,
  58                        const uint8_t * src);
  59
  60 #ifdef __cplusplus
  61 }
  62 #endif
  63 #endif                          /* NETTLE_ARCFOUR_H_INCLUDED */