Function getKey

TactilityCore/Source/crypt/Crypt.cpp:111–128

* Combines a stored key and a hardware key into a single reliable key value. * @param[out] key the key output */

 * @param[out] key the key output
 */
static void getKey(uint8_t key[32]) {
#if !defined(CONFIG_SECURE_BOOT) || !defined(CONFIG_SECURE_FLASH_ENC_ENABLED)
    LOGGER.warn("Using tt_secure_* code with secure boot and/or flash encryption disabled.");
    LOGGER.warn("An attacker with physical access to your ESP32 can decrypt your secure data.");
#endif

#ifdef ESP_PLATFORM
    uint8_t hardware_key[32];
    uint8_t nvs_key[32];

    get_hardware_key(hardware_key);
    get_nvs_key(nvs_key);
    xorKey(hardware_key, nvs_key, key, 32);
#else
    LOGGER.warn("Using unsafe key for debugging purposes.");
    memset(key, 0, 32);
#endif
}

void getIv(const void* data, size_t dataLength, uint8_t iv[16]) {
    memset(iv, 0, 16);