mdw@git.distorted.org.uk Git - secnet/blob - aes.h

   1 /*
   2  * aes.h - Header file declaring AES functions.
   3  */
   4 /*
   5  * This file is Free Software.  It has been modified to as part of its
   6  * incorporation into secnet.
   7  *
   8  * Copyright 2000 Vincent Rijmen, Antoon Bosselaers, Paulo Barreto
   9  * Copyright 2004 Fabrice Bellard
  10  * Copyright 2013 Ian Jackson
  11  *
  12  * You may redistribute this file and/or modify it under the terms of
  13  * the permissive licence shown below.
  14  *
  15  * You may redistribute secnet as a whole and/or modify it under the
  16  * terms of the GNU General Public License as published by the Free
  17  * Software Foundation; either version 3, or (at your option) any
  18  * later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, see
  27  * https://www.gnu.org/licenses/gpl.html.
  28  */
  29 /*
  30   * Copied from the upstream qemu git tree revision
  31   *   55616505876d6683130076b810a27c7889321560
  32   * but was introduced there by Fabrice Bellard in
  33   *   e4d4fe3c34cdd6e26f9b9975efec7d1e81ad00b6
  34   *   AES crypto support
  35   *   git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1036 \
  36   *     c046a42c-6fe2-441c-8c8c-71466251a162
  37   *
  38   * Modified by Ian Jackson to change the guard #define from
  39   * QEMU_AES_H to AES_H and to add some needed system #include's.
  40   *
  41   * The header file doesn't appear to have a separate copyright notice
  42   * but is clearly a lightly edited (by Bellard) version of code from
  43   * Rijmen, Bosselaers and Barreto.
  44   *
  45   * The original is from rijndael-alg-fst.c, with this copyright
  46   * notice:
  47   *
  48   *   rijndael-alg-fst.c
  49   *
  50   *   @version 3.0 (December 2000)
  51   *
  52   *   Optimised ANSI C code for the Rijndael cipher (now AES)
  53   *
  54   *   @author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be>
  55   *   @author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
  56   *   @author Paulo Barreto <paulo.barreto@terra.com.br>
  57   *
  58   *   This code is hereby placed in the public domain.
  59   *
  60   *   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
  61   *   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  62   *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  63   *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
  64   *   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  65   *   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  66   *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  67   *   BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  68   *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  69   *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  70   *   EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  71   *
  72   */
  73
  74 #ifndef AES_H
  75 #define AES_H
  76
  77 #include <stdint.h>
  78 #include <assert.h>
  79 #include <string.h>
  80
  81 #define AES_MAXNR 14
  82 #define AES_BLOCK_SIZE 16
  83
  84 struct aes_key_st {
  85     uint32_t rd_key[4 *(AES_MAXNR + 1)];
  86     int rounds;
  87 };
  88 typedef struct aes_key_st AES_KEY;
  89
  90 int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
  91         AES_KEY *key);
  92 int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
  93         AES_KEY *key);
  94
  95 void AES_encrypt(const unsigned char *in, unsigned char *out,
  96         const AES_KEY *key);
  97 void AES_decrypt(const unsigned char *in, unsigned char *out,
  98         const AES_KEY *key);
  99 void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
 100                      const unsigned long length, const AES_KEY *key,
 101                      unsigned char *ivec, const int enc);
 102
 103 #endif /* AES_H */