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55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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AES-CCM-128 (rfc 3610)
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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_CCM_128_H
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#define LIB_CRYPTO_AES_CCM_128_H
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#define AES_CCM_128_M 16
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#define AES_CCM_128_L 4
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#define AES_CCM_128_NONCE_SIZE (15 - AES_CCM_128_L)
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struct aes_ccm_128_context {
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AES_KEY aes_key;
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uint8_t nonce[AES_CCM_128_NONCE_SIZE];
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size_t a_remain;
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size_t m_remain;
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uint8_t X_i[AES_BLOCK_SIZE];
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uint8_t B_i[AES_BLOCK_SIZE];
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size_t B_i_ofs;
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uint8_t S_i[AES_BLOCK_SIZE];
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size_t S_i_ofs;
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size_t S_i_ctr;
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};
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void aes_ccm_128_init(struct aes_ccm_128_context *ctx,
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const uint8_t K[AES_BLOCK_SIZE],
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const uint8_t N[AES_CCM_128_NONCE_SIZE],
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size_t a_total, size_t m_total);
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void aes_ccm_128_update(struct aes_ccm_128_context *ctx,
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const uint8_t *v, size_t v_len);
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void aes_ccm_128_crypt(struct aes_ccm_128_context *ctx,
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uint8_t *m, size_t m_len);
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void aes_ccm_128_digest(struct aes_ccm_128_context *ctx,
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uint8_t digest[AES_BLOCK_SIZE]);
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#endif /* LIB_CRYPTO_AES_CCM_128_H */
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