/* * 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 "common.h" #include <stdio.h> #include "bitmaps.h" #include "firmware/usb.h" #include "hmac_drbg.h" #include "layout.h" #include "oled.h" #include "rng.h" #include "util.h" uint8_t HW_ENTROPY_DATA[HW_ENTROPY_LEN]; static HMAC_DRBG_CTX drbg_ctx; void __attribute__((noreturn)) __fatal_error(const char *expr, const char *msg, const char *file, int line_num, const char *func) { const BITMAP *icon = &bmp_icon_error; char line[128] = {0}; int y = icon->height + 3; oledClear(); oledDrawBitmap(0, 0, icon); oledDrawStringCenter(OLED_WIDTH / 2, (icon->height - FONT_HEIGHT) / 2 + 1, "FATAL ERROR", FONT_STANDARD); snprintf(line, sizeof(line), "Expr: %s", expr ? expr : "(null)"); oledDrawString(0, y, line, FONT_STANDARD); y += FONT_HEIGHT + 1; snprintf(line, sizeof(line), "Msg: %s", msg ? msg : "(null)"); oledDrawString(0, y, line, FONT_STANDARD); y += FONT_HEIGHT + 1; 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; snprintf(line, sizeof(line), "Func: %s", func ? func : "(null)"); oledDrawString(0, y, line, FONT_STANDARD); y += FONT_HEIGHT + 1; oledDrawString(0, y, "Contact Trezor support.", FONT_STANDARD); oledRefresh(); shutdown(); } 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(); } #ifndef NDEBUG void __assert_func(const char *file, int line, const char *func, const char *expr) { __fatal_error(expr, "assert failed", file, line, func); } #endif void hal_delay(uint32_t ms) { usbSleep(ms); } void drbg_init() { 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; }