src/aes256ctr.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL.
   7  */
   8
   9 /*
  10  *  seccure  -  Copyright 2009 B. Poettering
  11  *
  12  *  This program is free software; you can redistribute it and/or
  13  *  modify it under the terms of the GNU General Public License as
  14  *  published by the Free Software Foundation; either version 2 of the
  15  *  License, or (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  *  General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  25  *  02111-1307 USA
  26  */
  27
  28 /*
  29  *   SECCURE Elliptic Curve Crypto Utility for Reliable Encryption
  30  *
  31  *              http://point-at-infinity.org/seccure/
  32  *
  33  *
  34  * seccure implements a selection of asymmetric algorithms based on
  35  * elliptic curve cryptography (ECC). See the manpage or the project's
  36  * homepage for further details.
  37  *
  38  * This code links against the GNU gcrypt library "libgcrypt" (which
  39  * is part of the GnuPG project). Use the included Makefile to build
  40  * the binary.
  41  *
  42  * Report bugs to: seccure AT point-at-infinity.org
  43  *
  44  */
  45
  46 #ifndef AES256CTR_H
  47 #define AES256CTR_H
  48
  49 #include <gcrypt.h>
  50
  51 #define CIPHER_BLOCK_SIZE  16
  52 #define CIPHER_KEY_SIZE    32
  53 #define HMAC_KEY_SIZE      32
  54
  55 struct aes256ctr {
  56         gcry_cipher_hd_t ch;
  57         int idx;
  58         char buf[CIPHER_BLOCK_SIZE];
  59 };
  60
  61 extern struct aes256ctr *aes256ctr_init(const char *key);
  62 extern void aes256ctr_enc(struct aes256ctr *ac, char *buf, int len);
  63 #define aes256ctr_dec aes256ctr_enc
  64 extern void aes256ctr_done(struct aes256ctr *ac);
  65 extern int hmacsha256_init(gcry_md_hd_t * mh, const char *key, int len);
  66 #define aes256cprng aes256ctr
  67 #define aes256cprng_init aes256ctr_init
  68 extern void aes256cprng_fillbuf(struct aes256cprng *cprng, char *buf, int len);
  69 #define aes256cprng_done aes256ctr_done
  70
  71 #endif /* AES256CTR_H */