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trezor-firmware/legacy/common.c

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/*
* This file is part of the Trezor project, https://trezor.io/
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*
* 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 "common.h"
#include <stdio.h>
#include <unistd.h>
#include "bitmaps.h"
#include "firmware/usb.h"
#include "hmac_drbg.h"
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#include "layout.h"
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#include "oled.h"
#include "rng.h"
#include "timer.h"
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#include "util.h"
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uint8_t HW_ENTROPY_DATA[HW_ENTROPY_LEN];
static HMAC_DRBG_CTX drbg_ctx;
void __attribute__((noreturn))
__fatal_error(const char *msg, const char *file, int line_num) {
const BITMAP *icon = &bmp_icon_error;
char line[128] = {0};
int y = icon->height + 3;
oledClear();
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oledDrawBitmap(0, 0, icon);
oledDrawStringCenter(OLED_WIDTH / 2, (icon->height - FONT_HEIGHT) / 2 + 1,
"FATAL ERROR", FONT_STANDARD);
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snprintf(line, sizeof(line), "Expr: %s", "(null)");
oledDrawString(0, y, line, FONT_STANDARD);
y += FONT_HEIGHT + 1;
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snprintf(line, sizeof(line), "Msg: %s", msg ? msg : "(null)");
oledDrawString(0, y, line, FONT_STANDARD);
y += FONT_HEIGHT + 1;
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const char *label = "File: ";
snprintf(line, sizeof(line), "%s:%d", file ? file : "(null)", line_num);
oledDrawStringRight(OLED_WIDTH - 1, y, line, FONT_STANDARD);
oledBox(0, y, oledStringWidth(label, FONT_STANDARD), y + FONT_HEIGHT, false);
oledDrawString(0, y, label, FONT_STANDARD);
y += FONT_HEIGHT + 1;
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snprintf(line, sizeof(line), "Func: %s", "(null)");
oledDrawString(0, y, line, FONT_STANDARD);
y += FONT_HEIGHT + 1;
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oledDrawString(0, y, "Contact Trezor support.", FONT_STANDARD);
oledRefresh();
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shutdown();
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}
void __attribute__((noreturn))
error_shutdown(const char *line1, const char *line2, const char *line3,
const char *line4) {
layoutDialog(&bmp_icon_error, NULL, NULL, NULL, line1, line2, line3, line4,
"Please unplug", "the device.");
shutdown();
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}
#ifndef NDEBUG
void __assert_func(const char *file, int line, const char *func,
const char *expr) {
(void)func;
(void)expr;
__fatal_error("assert failed", file, line);
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}
#endif
void hal_delay(uint32_t ms) {
#if EMULATOR
usleep(ms * 1000);
#else
uint32_t start = timer_ms();
while ((timer_ms() - start) < ms) {
asm("nop");
}
#endif
}
uint32_t hal_ticks_ms(void) { return timer_ms(); }
void drbg_init(void) {
uint8_t entropy[48] = {0};
random_buffer(entropy, sizeof(entropy));
hmac_drbg_init(&drbg_ctx, entropy, sizeof(entropy), NULL, 0);
}
void drbg_reseed(const uint8_t *entropy, size_t len) {
hmac_drbg_reseed(&drbg_ctx, entropy, len, NULL, 0);
}
void drbg_generate(uint8_t *buf, size_t len) {
hmac_drbg_generate(&drbg_ctx, buf, len);
}
uint32_t drbg_random32(void) {
uint32_t value = 0;
drbg_generate((uint8_t *)&value, sizeof(value));
return value;
}
void show_wipe_code_screen(void) {
error_shutdown("You have entered the", "wipe code. All private",
"data has been erased.", NULL);
}
void show_pin_too_many_screen(void) {
error_shutdown("Too many wrong PIN", "attempts. Storage has", "been wiped.",
NULL);
}