mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-27 01:48:17 +00:00
33 lines
989 B
C
33 lines
989 B
C
|
/*
|
||
|
|
* This file is part of the TREZOR project, https://trezor.io/
|
||
|
|
*
|
||
|
|
* Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
|
||
|
|
*
|
||
|
|
* This library is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library 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 Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public License
|
||
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "rng.h"
|
||
|
|
|
||
|
|
uint32_t random32(void) {
|
||
|
|
static uint32_t last = 0;
|
||
|
|
uint32_t new;
|
||
|
|
|
||
|
|
do {
|
||
|
|
emulatorRandom(&new, sizeof(new));
|
||
|
|
} while (last == new);
|
||
|
|
|
||
|
|
last = new;
|
||
|
|
return new;
|
||
|
|
}
|