/* * This file is part of the Trezor project, https://trezor.io/ * * Copyright (C) 2014 Pavol Rusnak * * 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 . */ #include "reset.h" #include "bip39.h" #include "config.h" #include "fsm.h" #include "gettext.h" #include "layout2.h" #include "oled.h" #include "memzero.h" #include "messages.h" #include "messages.pb.h" #include "protect.h" #include "rng.h" #include "sha2.h" #include "util.h" static uint32_t strength; static uint8_t int_entropy[32]; static bool awaiting_entropy = false; static bool skip_backup = false; static bool no_backup = false; void reset_init(bool display_random, uint32_t _strength, bool passphrase_protection, bool pin_protection, const char *language, const char *label, uint32_t u2f_counter, bool _skip_backup, bool _no_backup) { if (_strength != 128 && _strength != 192 && _strength != 256) return; strength = _strength; skip_backup = _skip_backup; no_backup = _no_backup; if (display_random && (skip_backup || no_backup)) { fsm_sendFailure(FailureType_Failure_ProcessError, "Can't show internal entropy when backup is skipped"); layoutHome(); return; } layoutDialogSwipe(&bmp_icon_question, _("Cancel"), _("Confirm"), NULL, _("Do you really want to"), _("create a new wallet?"), NULL, _("By continuing you"), _("agree to trezor.io/tos"), NULL); if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) { fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL); layoutHome(); return; } random_buffer(int_entropy, 32); if (display_random) { for (int start = 0; start < 2; start++) { char ent_str[4][17]; char desc[] = "Internal entropy _/2:"; data2hex(int_entropy + start * 16, 4, ent_str[0]); data2hex(int_entropy + start * 16 + 4, 4, ent_str[1]); data2hex(int_entropy + start * 16 + 8, 4, ent_str[2]); data2hex(int_entropy + start * 16 + 12, 4, ent_str[3]); layoutLast = layoutDialogSwipe; layoutSwipe(); desc[17] = '1' + start; oledDrawStringCenter(OLED_WIDTH / 2, 0, desc, FONT_STANDARD); oledDrawStringCenter(OLED_WIDTH / 2, 2 + 1 * 9, ent_str[0], FONT_FIXED); oledDrawStringCenter(OLED_WIDTH / 2, 2 + 2 * 9, ent_str[1], FONT_FIXED); oledDrawStringCenter(OLED_WIDTH / 2, 2 + 3 * 9, ent_str[2], FONT_FIXED); oledDrawStringCenter(OLED_WIDTH / 2, 2 + 4 * 9, ent_str[3], FONT_FIXED); oledHLine(OLED_HEIGHT - 13); layoutButtonNo(_("Cancel")); layoutButtonYes(_("Continue")); // 40 is the maximum pixels used for a row oledSCA(2 + 1 * 9, 2 + 1 * 9 + 6, 40); oledSCA(2 + 2 * 9, 2 + 2 * 9 + 6, 40); oledSCA(2 + 3 * 9, 2 + 3 * 9 + 6, 40); oledSCA(2 + 4 * 9, 2 + 4 * 9 + 6, 40); oledRefresh(); if (!protectButton(ButtonRequestType_ButtonRequest_ResetDevice, false)) { fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL); layoutHome(); return; } } } if (pin_protection && !protectChangePin(false)) { layoutHome(); return; } config_setPassphraseProtection(passphrase_protection); config_setLanguage(language); config_setLabel(label); config_setU2FCounter(u2f_counter); EntropyRequest resp; memzero(&resp, sizeof(EntropyRequest)); msg_write(MessageType_MessageType_EntropyRequest, &resp); awaiting_entropy = true; } void reset_entropy(const uint8_t *ext_entropy, uint32_t len) { if (!awaiting_entropy) { fsm_sendFailure(FailureType_Failure_UnexpectedMessage, _("Not in Reset mode")); return; } awaiting_entropy = false; SHA256_CTX ctx; sha256_Init(&ctx); sha256_Update(&ctx, int_entropy, 32); sha256_Update(&ctx, ext_entropy, len); sha256_Final(&ctx, int_entropy); const char *mnemonic = mnemonic_from_data(int_entropy, strength / 8); memzero(int_entropy, 32); if (skip_backup || no_backup) { if (no_backup) { config_setNoBackup(); } else { config_setNeedsBackup(true); } if (config_setMnemonic(mnemonic)) { fsm_sendSuccess(_("Device successfully initialized")); } else { fsm_sendFailure(FailureType_Failure_ProcessError, _("Failed to store mnemonic")); } layoutHome(); } else { reset_backup(false, mnemonic); } mnemonic_clear(); } static char current_word[10]; // separated == true if called as a separate workflow via BackupMessage void reset_backup(bool separated, const char *mnemonic) { if (separated) { bool needs_backup = false; config_getNeedsBackup(&needs_backup); if (!needs_backup) { fsm_sendFailure(FailureType_Failure_UnexpectedMessage, _("Seed already backed up")); return; } config_setUnfinishedBackup(true); config_setNeedsBackup(false); } for (int pass = 0; pass < 2; pass++) { int i = 0, word_pos = 1; while (mnemonic[i] != 0) { // copy current_word int j = 0; while (mnemonic[i] != ' ' && mnemonic[i] != 0 && j + 1 < (int)sizeof(current_word)) { current_word[j] = mnemonic[i]; i++; j++; } current_word[j] = 0; if (mnemonic[i] != 0) { i++; } layoutResetWord(current_word, pass, word_pos, mnemonic[i] == 0); if (!protectButton(ButtonRequestType_ButtonRequest_ConfirmWord, true)) { if (!separated) { session_clear(true); } layoutHome(); fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL); return; } word_pos++; } } config_setUnfinishedBackup(false); if (separated) { fsm_sendSuccess(_("Seed successfully backed up")); } else { config_setNeedsBackup(false); if (config_setMnemonic(mnemonic)) { fsm_sendSuccess(_("Device successfully initialized")); } else { fsm_sendFailure(FailureType_Failure_ProcessError, _("Failed to store mnemonic")); } } layoutHome(); } #if DEBUG_LINK uint32_t reset_get_int_entropy(uint8_t *entropy) { memcpy(entropy, int_entropy, 32); return 32; } const char *reset_get_word(void) { return current_word; } #endif