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965f04d5e6
- We avoid variables in order to do a lazy cleanup
in aes_ccm_128_digest() via ZERO_STRUCTP(ctx)
- We use the optimized aes_block_{xor,rshift}() functions
- Align AES_BLOCK_SIZE arrays to 8 bytes
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11451
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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AES-GCM-128
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Copyright (C) Stefan Metzmacher 2014
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIB_CRYPTO_AES_GCM_128_H
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#define LIB_CRYPTO_AES_GCM_128_H
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#define AES_GCM_128_IV_SIZE (12)
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struct aes_gcm_128_context {
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AES_KEY aes_key;
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uint64_t __align;
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struct aes_gcm_128_tmp {
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size_t ofs;
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size_t total;
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uint8_t block[AES_BLOCK_SIZE];
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} A, C, c, v, y;
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uint8_t H[AES_BLOCK_SIZE];
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uint8_t J0[AES_BLOCK_SIZE];
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uint8_t CB[AES_BLOCK_SIZE];
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uint8_t Y[AES_BLOCK_SIZE];
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uint8_t AC[AES_BLOCK_SIZE];
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};
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void aes_gcm_128_init(struct aes_gcm_128_context *ctx,
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const uint8_t K[AES_BLOCK_SIZE],
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const uint8_t IV[AES_GCM_128_IV_SIZE]);
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void aes_gcm_128_updateA(struct aes_gcm_128_context *ctx,
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const uint8_t *a, size_t a_len);
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void aes_gcm_128_updateC(struct aes_gcm_128_context *ctx,
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const uint8_t *c, size_t c_len);
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void aes_gcm_128_crypt(struct aes_gcm_128_context *ctx,
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uint8_t *m, size_t m_len);
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void aes_gcm_128_digest(struct aes_gcm_128_context *ctx,
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uint8_t T[AES_BLOCK_SIZE]);
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#endif /* LIB_CRYPTO_AES_GCM_128_H */
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