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8795ad2030
- We avoid variables in order to do a lazy cleanup
in aes_cmac_128_final() via ZERO_STRUCTP(ctx)
- We avoid unused memcpy() calls
- We use the optimized aes_block_{xor,lshift}() 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>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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AES-CMAC-128 (rfc 4493)
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Copyright (C) Stefan Metzmacher 2012
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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_CMAC_128_H
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#define LIB_CRYPTO_AES_CMAC_128_H
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struct aes_cmac_128_context {
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AES_KEY aes_key;
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uint64_t __align;
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uint8_t K1[AES_BLOCK_SIZE];
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uint8_t K2[AES_BLOCK_SIZE];
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uint8_t L[AES_BLOCK_SIZE];
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uint8_t X[AES_BLOCK_SIZE];
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uint8_t Y[AES_BLOCK_SIZE];
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uint8_t tmp[AES_BLOCK_SIZE];
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uint8_t last[AES_BLOCK_SIZE];
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size_t last_len;
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};
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void aes_cmac_128_init(struct aes_cmac_128_context *ctx,
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const uint8_t K[AES_BLOCK_SIZE]);
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void aes_cmac_128_update(struct aes_cmac_128_context *ctx,
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const uint8_t *_msg, size_t _msg_len);
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void aes_cmac_128_final(struct aes_cmac_128_context *ctx,
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uint8_t T[AES_BLOCK_SIZE]);
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#endif /* LIB_CRYPTO_AES_CMAC_128_H */
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