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/*
* This file is part of the UWB stack for linux.
*
* Copyright (c) 2020-2021 Qorvo US, Inc.
*
* This software is provided under the GNU General Public License, version 2
* (GPLv2), as well as under a Qorvo commercial license.
*
* You may choose to use this software under the terms of the GPLv2 License,
* version 2 ("GPLv2"), as published by the Free Software Foundation.
* You should have received a copy of the GPLv2 along with this program. If
* not, see <http://www.gnu.org/licenses/>.
*
* This program is distributed under the GPLv2 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 GPLv2 for more
* details.
*
* If you cannot meet the requirements of the GPLv2, you may not use this
* software for any purpose without first obtaining a commercial license from
* Qorvo. Please contact Qorvo to inquire about licensing terms.
*/
#ifndef FIRA_CMAC_H
#define FIRA_CMAC_H
#include <crypto/aes.h>
#include <linux/types.h>
#define FIRA_KDF_LABEL_LEN 8
#define FIRA_KDF_CONTEXT_LEN 16
/**
* fira_digest() - Compute a digest using cmac(aes).
* @key: AES key.
* @key_len: Length of AES key (AES_KEYSIZE_x).
* @data: Input data.
* @data_len: Input data length in octets.
* @out: Output hash, with length AES_BLOCK_SIZE.
*
* Return: 0 or error.
*/
int fira_digest(const u8 *key, unsigned int key_len, const u8 *data,
unsigned int data_len, u8 *out);
/**
* fira_kdf() - Key derivation function.
* @input_key: AES input key.
* @input_key_len: Length of AES input key.
* @label: KDF label (8 bytes).
* @context: KDF context (16 bytes).
* @output_key: AES output key.
* @output_key_len: Length of AES output key.
*
* Return: 0 or error.
*/
int fira_kdf(const u8 *input_key, unsigned int input_key_len, const char *label,
const u8 *context, u8 *output_key, unsigned int output_key_len);
#endif /* FIRA_CMAC_H */
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