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/*
* seccure - Copyright 2014 B. Poettering
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
/*
* SECCURE Elliptic Curve Crypto Utility for Reliable Encryption
*
* http://point-at-infinity.org/seccure/
*
*
* seccure implements a selection of asymmetric algorithms based on
* elliptic curve cryptography (ECC). See the manpage or the project's
* homepage for further details.
*
* This code links against the GNU gcrypt library "libgcrypt" (which
* is part of the GnuPG project). Use the included Makefile to build
* the binary.
*
* Report bugs to: seccure AT point-at-infinity.org
*
*/
#ifndef INC_AES256CTR_H
#define INC_AES256CTR_H
#include <gcrypt.h>
#define CIPHER_BLOCK_SIZE 16
#define CIPHER_KEY_SIZE 32
#define HMAC_KEY_SIZE 32
struct aes256ctr {
gcry_cipher_hd_t ch;
int idx;
char buf[CIPHER_BLOCK_SIZE];
};
struct aes256ctr* aes256ctr_init(const char *key);
void aes256ctr_enc(struct aes256ctr *ac, char *buf, size_t len);
#define aes256ctr_dec aes256ctr_enc
void aes256ctr_done(struct aes256ctr *ac);
int hmacsha256_init(gcry_md_hd_t *mh, const char *key, size_t len);
#define aes256cprng aes256ctr
#define aes256cprng_init aes256ctr_init
void aes256cprng_fillbuf(struct aes256cprng *cprng, char *buf, size_t len);
#define aes256cprng_done aes256ctr_done
#endif /* INC_AES256CTR_H */
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