mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-25 17:09:44 +00:00
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common.h"
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#include <stdio.h>
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#include "bitmaps.h"
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#include "firmware/usb.h"
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#include "hmac_drbg.h"
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#include "layout.h"
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#include "oled.h"
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#include "rng.h"
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#include "util.h"
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uint8_t HW_ENTROPY_DATA[HW_ENTROPY_LEN];
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static HMAC_DRBG_CTX drbg_ctx;
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void __attribute__((noreturn))
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__fatal_error(const char *expr, const char *msg, const char *file, int line_num,
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const char *func) {
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const BITMAP *icon = &bmp_icon_error;
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char line[128] = {0};
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int y = icon->height + 3;
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oledClear();
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oledDrawBitmap(0, 0, icon);
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oledDrawStringCenter(OLED_WIDTH / 2, (icon->height - FONT_HEIGHT) / 2 + 1,
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"FATAL ERROR", FONT_STANDARD);
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snprintf(line, sizeof(line), "Expr: %s", expr ? expr : "(null)");
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oledDrawString(0, y, line, FONT_STANDARD);
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y += FONT_HEIGHT + 1;
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snprintf(line, sizeof(line), "Msg: %s", msg ? msg : "(null)");
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oledDrawString(0, y, line, FONT_STANDARD);
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y += FONT_HEIGHT + 1;
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const char *label = "File: ";
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snprintf(line, sizeof(line), "%s:%d", file ? file : "(null)", line_num);
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oledDrawStringRight(OLED_WIDTH - 1, y, line, FONT_STANDARD);
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oledBox(0, y, oledStringWidth(label, FONT_STANDARD), y + FONT_HEIGHT, false);
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oledDrawString(0, y, label, FONT_STANDARD);
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y += FONT_HEIGHT + 1;
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snprintf(line, sizeof(line), "Func: %s", func ? func : "(null)");
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oledDrawString(0, y, line, FONT_STANDARD);
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y += FONT_HEIGHT + 1;
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oledDrawString(0, y, "Contact Trezor support.", FONT_STANDARD);
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oledRefresh();
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shutdown();
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}
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void __attribute__((noreturn))
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error_shutdown(const char *line1, const char *line2, const char *line3,
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const char *line4) {
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layoutDialog(&bmp_icon_error, NULL, NULL, NULL, line1, line2, line3, line4,
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"Please unplug", "the device.");
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shutdown();
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}
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#ifndef NDEBUG
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void __assert_func(const char *file, int line, const char *func,
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const char *expr) {
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__fatal_error(expr, "assert failed", file, line, func);
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}
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#endif
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void hal_delay(uint32_t ms) { usbSleep(ms); }
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void wait_random(void) {
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int wait = random32() & 0xff;
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volatile int i = 0;
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volatile int j = wait;
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while (i < wait) {
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if (i + j != wait) {
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shutdown();
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}
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++i;
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--j;
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}
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// Double-check loop completion.
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if (i != wait || j != 0) {
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shutdown();
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}
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}
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void drbg_init() {
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uint8_t entropy[48] = {0};
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random_buffer(entropy, sizeof(entropy));
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hmac_drbg_init(&drbg_ctx, entropy, sizeof(entropy), NULL, 0);
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}
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void drbg_reseed(const uint8_t *entropy, size_t len) {
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hmac_drbg_reseed(&drbg_ctx, entropy, len, NULL, 0);
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}
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void drbg_generate(uint8_t *buf, size_t len) {
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hmac_drbg_generate(&drbg_ctx, buf, len);
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}
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uint32_t drbg_random32(void) {
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uint32_t value = 0;
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drbg_generate((uint8_t *)&value, sizeof(value));
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return value;
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}
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