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/*
AES-GCM-128
Copyright (C) Stefan Metzmacher 2014
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_GCM_128_H
#define LIB_CRYPTO_AES_GCM_128_H
#define AES_GCM_128_IV_SIZE (12)
struct aes_gcm_128_context {
AES_KEY aes_key;
uint8_t H[AES_BLOCK_SIZE];
uint8_t J0[AES_BLOCK_SIZE];
uint8_t CB[AES_BLOCK_SIZE];
uint8_t Y[AES_BLOCK_SIZE];
uint8_t AC[AES_BLOCK_SIZE];
struct aes_gcm_128_tmp {
uint8_t block[AES_BLOCK_SIZE];
size_t ofs;
size_t total;
} A, C, c, y;
};
void aes_gcm_128_init(struct aes_gcm_128_context *ctx,
const uint8_t K[AES_BLOCK_SIZE],
const uint8_t IV[AES_GCM_128_IV_SIZE]);
void aes_gcm_128_updateA(struct aes_gcm_128_context *ctx,
const uint8_t *a, size_t a_len);
void aes_gcm_128_updateC(struct aes_gcm_128_context *ctx,
const uint8_t *c, size_t c_len);
void aes_gcm_128_crypt(struct aes_gcm_128_context *ctx,
uint8_t *m, size_t m_len);
void aes_gcm_128_digest(struct aes_gcm_128_context *ctx,
uint8_t T[AES_BLOCK_SIZE]);
#endif /* LIB_CRYPTO_AES_GCM_128_H */
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