lib/des.h

   1 /*
   2  *  FIPS-46-3 compliant 3DES implementation
   3  *
   4  *  Copyright (C) 2001-2003  Christophe Devine
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef _DES_H
  22 #define _DES_H
  23
  24 #include <stdint.h>
  25
  26 typedef struct
  27 {
  28     uint32_t esk[32];     /* DES encryption subkeys */
  29     uint32_t dsk[32];     /* DES decryption subkeys */
  30 }
  31 des_context;
  32
  33 typedef struct
  34 {
  35     uint32_t esk[96];     /* Triple-DES encryption subkeys */
  36     uint32_t dsk[96];     /* Triple-DES decryption subkeys */
  37 }
  38 des3_context;
  39
  40 int  des_set_key( des_context *ctx, uint8_t key[8] );
  41 void des_encrypt( des_context *ctx, uint8_t input[8], uint8_t output[8] );
  42 void des_decrypt( des_context *ctx, uint8_t input[8], uint8_t output[8] );
  43
  44 int  des3_set_2keys( des3_context *ctx, const uint8_t key1[8], const uint8_t key2[8] );
  45 int  des3_set_3keys( des3_context *ctx, const uint8_t key1[8], const uint8_t key2[8],
  46                                         const uint8_t key3[8] );
  47
  48 void des3_encrypt( des3_context *ctx, uint8_t input[8], uint8_t output[8] );
  49 void des3_decrypt( des3_context *ctx, uint8_t input[8], uint8_t output[8] );
  50
  51 #endif /* des.h */