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f059e57322
- Rearrange class variables to minimize storage padding. - Add protected getters for EspnowMeshBackend and MeshBackendBase components. - Partially update README.md
53 lines
2.2 KiB
C++
53 lines
2.2 KiB
C++
/*
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* Copyright (C) 2019 Anders Löfgren
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*
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* License (MIT license):
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "MeshCryptoInterface.h"
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#include <assert.h>
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namespace MeshCryptoInterface
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{
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String createMeshHmac(const String &message, const void *hashKey, const size_t hashKeyLength, const size_t hmacLength)
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{
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return experimental::crypto::SHA256::hmac(message, hashKey, hashKeyLength, hmacLength);
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}
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bool verifyMeshHmac(const String &message, const String &messageHmac, const uint8_t *hashKey, const uint8_t hashKeyLength)
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{
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String generatedHmac = createMeshHmac(message, hashKey, hashKeyLength, messageHmac.length()/2); // We know that each HMAC byte should become 2 String characters due to uint8ArrayToHexString.
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if(generatedHmac == messageHmac)
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return true;
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else
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return false;
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}
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uint8_t *initializeKey(uint8_t *key, const uint8_t keyLength, const String &keySeed)
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{
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assert(keyLength <= experimental::crypto::SHA256::NATURAL_LENGTH);
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uint8_t hashArray[experimental::crypto::SHA256::NATURAL_LENGTH] {};
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experimental::crypto::SHA256::hash(keySeed.c_str(), keySeed.length(), hashArray);
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memcpy(key, hashArray, keyLength);
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return key;
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}
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}
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