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trezor-firmware/legacy/time_estimate.c

36 lines
1.1 KiB
C

/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "time_estimate.h"
// The number of CPU cycles required to execute one iteration of PBKDF2.
#define PIN_PBKDF2_CYCLES_PER_ITER 11100
// MCU clock 120 MHz
#define MCU_CLOCK 120000000
uint32_t time_estimate_pbkdf2_ms(uint32_t iterations) {
#if EMULATOR
(void)iterations;
return 500;
#else
return PIN_PBKDF2_CYCLES_PER_ITER * iterations / (MCU_CLOCK / 1000);
#endif
}