ebadb11645
Adds, removes and modifies includes in all LE audio files. Fixes any found spelling mistakes as well. Fixes a few places where incorrect types were used. Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*
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* Copyright (c) 2019 Bose Corporation
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* Copyright (c) 2021-2022 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdint.h>
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#include <zephyr/bluetooth/audio/csip.h>
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#include <zephyr/types.h>
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#define BT_CSIP_CRYPTO_KEY_SIZE 16
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#define BT_CSIP_CRYPTO_SALT_SIZE 16
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#define BT_CSIP_CRYPTO_PRAND_SIZE 3
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#define BT_CSIP_CRYPTO_HASH_SIZE 3
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/**
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* @brief Private Set Unique identifier hash function sih.
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*
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* The RSI hash function sih is used to generate a hash value that is
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* used in RSIs - Used by the Coordinated Set Identification service and
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* profile.
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*
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* @param sirk 16 byte LS byte first SIRK
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* @param r 3 byte LS byte first random value
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* @param out 3 byte LS byte first output buffer
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* @return int 0 on success, any other value indicates a failure.
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*/
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int bt_csip_sih(const uint8_t sirk[BT_CSIP_SIRK_SIZE], uint8_t r[BT_CSIP_CRYPTO_PRAND_SIZE],
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uint8_t out[BT_CSIP_CRYPTO_HASH_SIZE]);
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/**
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* @brief SIRK encryption function sef
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*
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* The SIRK encryption function sef is used by the server to encrypt the SIRK
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* with a key K. The value of K depends on the transport on which the pairing
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* between the client and the server was performed.
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*
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* If the pairing was performed on BR/EDR, K is equal to the Link Key shared by
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* the server and the client.
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* K = Link Key.
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*
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* If the pairing was performed on LE, the 64 LSBs of K correspond to the 64
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* LSBs of the IRK that the server sent to the client during the Phase 3
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* (Transport Specific Key Distribution) of the pairing procedure (see Volume 3,
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* Part H, Section 2.1 in [2]), and the 64 MSBs of K correspond to the 64 MSBs
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* of the LTK shared by the server and client. That is,
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* K = LTK_64-127 || IRK_0-63
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*
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* @param k 16-byte key.
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* @param sirk The unencrypted SIRK.
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* @param out_sirk The encrypted SIRK.
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* @return int 0 on success, any other value indicates a failure.
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*/
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int bt_csip_sef(const uint8_t k[BT_CSIP_CRYPTO_KEY_SIZE], const uint8_t sirk[BT_CSIP_SIRK_SIZE],
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uint8_t out_sirk[BT_CSIP_SIRK_SIZE]);
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/**
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* @brief SIRK decryption function sdf
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*
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* The SIRK decryption function sdf is used by the client to decrypt the SIRK
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* with a key K. The value of K depends on the transport on which the pairing
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* between the client and the server was performed.
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*
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* If the pairing was performed on BR/EDR, K is equal to the Link Key shared by
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* the server and the client.
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* K = Link Key.
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*
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* If the pairing was performed on LE, the 64 LSBs of K correspond to the 64
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* LSBs of the IRK that the server sent to the client during the Phase 3
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* (Transport Specific Key Distribution) of the pairing procedure (see Volume 3,
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* Part H, Section 2.1 in [2]), and the 64 MSBs of K correspond to the 64 MSBs
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* of the LTK shared by the server and client. That is,
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* K = LTK_64-127 || IRK_0-63
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*
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* @param k 16-byte key.
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* @param sirk The encrypted SIRK.
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* @param out_sirk The decrypted SIRK.
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* @return int 0 on success, any other value indicates a failure.
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*/
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int bt_csip_sdf(const uint8_t k[BT_CSIP_CRYPTO_KEY_SIZE], const uint8_t enc_sirk[BT_CSIP_SIRK_SIZE],
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uint8_t out_sirk[BT_CSIP_SIRK_SIZE]);
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