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