From 5adf63fe301e812f5776448f9560af9d6d842554 Mon Sep 17 00:00:00 2001 From: Stefan Metzmacher Date: Fri, 20 Jul 2012 07:37:48 +0200 Subject: lib/crypto: add aes_ccm_128 metze --- lib/crypto/aes_ccm_128.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 lib/crypto/aes_ccm_128.h (limited to 'lib/crypto/aes_ccm_128.h') diff --git a/lib/crypto/aes_ccm_128.h b/lib/crypto/aes_ccm_128.h new file mode 100644 index 00000000000..a98c7544335 --- /dev/null +++ b/lib/crypto/aes_ccm_128.h @@ -0,0 +1,54 @@ +/* + 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 . +*/ + +#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 */ -- cgit