140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
/*
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* Copyright (c) 2023, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file
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* This file includes definitions for 802.15.4 frame processing.
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*/
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#ifndef IEEE802154_PACKET_UTILS_HPP_
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#define IEEE802154_PACKET_UTILS_HPP_
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#include "openthread-core-config.h"
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#include <openthread/platform/crypto.h>
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#include <stdint.h>
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#include "common/error.hpp"
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#include "crypto/aes_ecb.hpp"
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#include "mac/mac_types.hpp"
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/**
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* This class implements Packet Processing.
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*
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*/
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class TxSecurityProcessing
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{
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public:
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enum
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{
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kBlockSize = 16, ///< AES-128 block size (bytes).
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kKeyBits = 128
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};
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/**
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* This method sets the key.
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*
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* @param[in] aKey Pointer to the AES Key to use.
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*
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*/
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void SetKey(const uint8_t *aKey) { mKey = aKey; }
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/**
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* This method initializes the AES CCM computation.
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*
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* @param[in] aHeaderLength Length of header in bytes.
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* @param[in] aPlainTextLength Length of plaintext in bytes.
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* @param[in] aTagLength Length of tag in bytes (must be even and in `[kMinTagLength, kMaxTagLength]`).
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* @param[in] aNonce A pointer to the nonce.
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* @param[in] aNonceLength Length of nonce in bytes.
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*
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*/
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void Init(uint32_t aHeaderLength,
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uint32_t aPlainTextLength,
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uint8_t aTagLength,
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const void *aNonce,
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uint8_t aNonceLength);
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/**
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* This method processes the header.
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*
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* @param[in] aHeader A pointer to the header.
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* @param[in] aHeaderLength Length of header in bytes.
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*
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*/
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void Header(const void *aHeader, uint32_t aHeaderLength);
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/**
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* This method processes the payload.
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*
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* @param[inout] aPlainText A pointer to the plaintext.
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* @param[inout] aCipherText A pointer to the ciphertext.
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* @param[in] aLength Payload length in bytes.
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* @param[in] aMode Mode to indicate whether to encrypt (`kEncrypt`) or decrypt (`kDecrypt`).
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*
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*/
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void Payload(void *aPlainText, void *aCipherText, uint32_t aLength);
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/**
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* This method returns the tag length in bytes.
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*
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* @returns The tag length in bytes.
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*
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*/
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uint8_t GetTagLength(void) const { return mTagLength; }
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/**
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* This method generates the tag.
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*
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* @param[out] aTag A pointer to the tag (must have `GetTagLength()` bytes).
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*
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*/
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void Finalize(void *aTag);
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private:
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uint8_t mBlock[kBlockSize];
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uint8_t mCtr[kBlockSize];
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uint8_t mCtrPad[kBlockSize];
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const uint8_t *mKey;
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uint32_t mHeaderLength;
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uint32_t mHeaderCur;
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uint32_t mPlainTextLength;
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uint32_t mPlainTextCur;
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uint16_t mBlockLength;
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uint16_t mCtrLength;
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uint8_t mNonceLength;
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uint8_t mTagLength;
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};
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/**
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* @}
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*
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*/
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#endif // IEEE802154_PACKET_UTILS_HPP_
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