From 062d1a09c2ef5efcdb85c77d7d27109b1317b46c Mon Sep 17 00:00:00 2001 From: Stefan Metzmacher Date: Sat, 18 Feb 2012 11:47:31 +0100 Subject: lib/crypto: add aes_cmac_128* (rfc 4493) Thanks to Jeremy, Michael and Volker for the debugging! metze --- lib/crypto/aes_cmac_128.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 lib/crypto/aes_cmac_128.h (limited to 'lib/crypto/aes_cmac_128.h') diff --git a/lib/crypto/aes_cmac_128.h b/lib/crypto/aes_cmac_128.h new file mode 100644 index 0000000000..28117a06b3 --- /dev/null +++ b/lib/crypto/aes_cmac_128.h @@ -0,0 +1,41 @@ +/* + AES-CMAC-128 (rfc 4493) + 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_CMAC_128_H +#define LIB_CRYPTO_AES_CMAC_128_H + +struct aes_cmac_128_context { + AES_KEY aes_key; + + uint8_t K1[AES_BLOCK_SIZE]; + uint8_t K2[AES_BLOCK_SIZE]; + + uint8_t X[AES_BLOCK_SIZE]; + + uint8_t last[AES_BLOCK_SIZE]; + size_t last_len; +}; + +void aes_cmac_128_init(struct aes_cmac_128_context *ctx, + const uint8_t K[AES_BLOCK_SIZE]); +void aes_cmac_128_update(struct aes_cmac_128_context *ctx, + const uint8_t *_msg, size_t _msg_len); +void aes_cmac_128_final(struct aes_cmac_128_context *ctx, + uint8_t T[AES_BLOCK_SIZE]); + +#endif /* LIB_CRYPTO_AES_CMAC_128_H */ -- cgit