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/*
AES-CCM-128 (rfc 3610)
Copyright (C) Stefan Metzmacher 2012
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIB_CRYPTO_AES_CCM_128_H
#define LIB_CRYPTO_AES_CCM_128_H
#define AES_CCM_128_M 16
#define AES_CCM_128_L 4
#define AES_CCM_128_NONCE_SIZE (15 - AES_CCM_128_L)
struct aes_ccm_128_context {
AES_KEY aes_key;
uint8_t nonce[AES_CCM_128_NONCE_SIZE];
size_t a_remain;
size_t m_remain;
uint8_t X_i[AES_BLOCK_SIZE];
uint8_t B_i[AES_BLOCK_SIZE];
size_t B_i_ofs;
uint8_t S_i[AES_BLOCK_SIZE];
size_t S_i_ofs;
size_t S_i_ctr;
};
void aes_ccm_128_init(struct aes_ccm_128_context *ctx,
const uint8_t K[AES_BLOCK_SIZE],
const uint8_t N[AES_CCM_128_NONCE_SIZE],
size_t a_total, size_t m_total);
void aes_ccm_128_update(struct aes_ccm_128_context *ctx,
const uint8_t *v, size_t v_len);
void aes_ccm_128_crypt(struct aes_ccm_128_context *ctx,
uint8_t *m, size_t m_len);
void aes_ccm_128_digest(struct aes_ccm_128_context *ctx,
uint8_t digest[AES_BLOCK_SIZE]);
#endif /* LIB_CRYPTO_AES_CCM_128_H */
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