/*
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* Copyright (C) 2018 Southern Storm Software, Pty Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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
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* in 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
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* OR 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "AES.h"
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#include "Crypto.h"
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#include <string.h>
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// AES implementation for ESP32 using the hardware crypto module.
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#if defined(CRYPTO_AES_ESP32)
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AESCommon::AESCommon(uint8_t keySize)
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{
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ctx.key_bytes = keySize;
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}
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AESCommon::~AESCommon()
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{
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clean(ctx.key, sizeof(ctx.key));
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}
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size_t AESCommon::blockSize() const
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{
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return 16;
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}
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size_t AESCommon::keySize() const
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{
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return ctx.key_bytes;
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}
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bool AESCommon::setKey(const uint8_t *key, size_t len)
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{
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if (len == ctx.key_bytes) {
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// Do the effect of esp_aes_setkey() which is just a memcpy().
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memcpy(ctx.key, key, len);
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return true;
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}
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return false;
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}
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void AESCommon::encryptBlock(uint8_t *output, const uint8_t *input)
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{
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esp_aes_encrypt(&ctx, input, output);
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}
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void AESCommon::decryptBlock(uint8_t *output, const uint8_t *input)
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{
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esp_aes_decrypt(&ctx, input, output);
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}
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void AESCommon::clear()
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{
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clean(ctx.key, sizeof(ctx.key));
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}
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AES128::~AES128()
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{
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}
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AES192::~AES192()
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{
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}
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AES256::~AES256()
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{
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}
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#endif // CRYPTO_AES_ESP32
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