mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 16:08:17 +00:00
629 lines
18 KiB
C
629 lines
18 KiB
C
/*
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* This file is part of the TREZOR project.
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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 "trezor.h"
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#include "fsm.h"
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#include "messages.h"
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#include "bip32.h"
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#include "storage.h"
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#include "coins.h"
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#include "debug.h"
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#include "transaction.h"
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#include "rng.h"
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#include "storage.h"
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#include "oled.h"
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#include "protect.h"
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#include "pinmatrix.h"
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#include "layout2.h"
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#include "ecdsa.h"
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#include "reset.h"
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#include "recovery.h"
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#include "memory.h"
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#include "usb.h"
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#include "util.h"
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#include "signing.h"
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#include "aes.h"
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#include "hmac.h"
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// message methods
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static uint8_t msg_resp[MSG_OUT_SIZE];
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#define RESP_INIT(TYPE) TYPE *resp = (TYPE *)msg_resp; memset(resp, 0, sizeof(TYPE));
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void fsm_sendSuccess(const char *text)
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{
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RESP_INIT(Success);
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if (text) {
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resp->has_message = true;
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strlcpy(resp->message, text, sizeof(resp->message));
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}
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msg_write(MessageType_MessageType_Success, resp);
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}
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void fsm_sendFailure(FailureType code, const char *text)
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{
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if (protectAbortedByInitialize) {
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fsm_msgInitialize((Initialize *)0);
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protectAbortedByInitialize = false;
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return;
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}
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RESP_INIT(Failure);
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resp->has_code = true;
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resp->code = code;
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if (text) {
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resp->has_message = true;
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strlcpy(resp->message, text, sizeof(resp->message));
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}
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msg_write(MessageType_MessageType_Failure, resp);
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}
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HDNode *fsm_getRootNode(void)
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{
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static HDNode node;
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if (!storage_getRootNode(&node)) {
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layoutHome();
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fsm_sendFailure(FailureType_Failure_NotInitialized, "Device not initialized or passphrase request cancelled");
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return 0;
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}
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return &node;
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}
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void fsm_deriveKey(HDNode *node, uint32_t *address_n, size_t address_n_count)
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{
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size_t i;
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if (address_n_count > 3) {
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layoutProgressSwipe("Preparing keys", 0, 0);
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}
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for (i = 0; i < address_n_count; i++) {
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hdnode_private_ckd(node, address_n[i]);
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if (address_n_count > 3) {
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layoutProgress("Preparing keys", 1000 * i / address_n_count, i);
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}
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}
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}
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void fsm_msgInitialize(Initialize *msg)
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{
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(void)msg;
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recovery_abort();
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signing_abort();
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RESP_INIT(Features);
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resp->has_vendor = true; strlcpy(resp->vendor, "bitcointrezor.com", sizeof(resp->vendor));
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resp->has_major_version = true; resp->major_version = VERSION_MAJOR;
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resp->has_minor_version = true; resp->minor_version = VERSION_MINOR;
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resp->has_patch_version = true; resp->patch_version = VERSION_PATCH;
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resp->has_device_id = true; strlcpy(resp->device_id, storage_uuid_str, sizeof(resp->device_id));
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resp->has_pin_protection = true; resp->pin_protection = storage.has_pin;
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resp->has_passphrase_protection = true; resp->passphrase_protection = storage.has_passphrase_protection && storage.passphrase_protection;
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#ifdef SCM_REVISION
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int len = sizeof(SCM_REVISION) - 1;
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resp->has_revision = true; memcpy(resp->revision.bytes, SCM_REVISION, len); resp->revision.size = len;
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#endif
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resp->has_bootloader_hash = true; resp->bootloader_hash.size = memory_bootloader_hash(resp->bootloader_hash.bytes);
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if (storage.has_language) {
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resp->has_language = true;
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strlcpy(resp->language, storage.language, sizeof(resp->language));
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}
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if (storage.has_label) {
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resp->has_label = true;
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strlcpy(resp->label, storage.label, sizeof(resp->label));
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}
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resp->coins_count = COINS_COUNT;
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memcpy(resp->coins, coins, COINS_COUNT * sizeof(CoinType));
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resp->has_initialized = true; resp->initialized = storage_isInitialized();
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resp->has_imported = true; resp->imported = storage.has_imported && storage.imported;
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msg_write(MessageType_MessageType_Features, resp);
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}
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void fsm_msgPing(Ping *msg)
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{
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RESP_INIT(Success);
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if (msg->has_button_protection && msg->button_protection) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "answer to ping?", NULL, NULL, NULL, NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Ping cancelled");
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layoutHome();
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return;
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}
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}
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if (msg->has_pin_protection && msg->pin_protection) {
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if (!protectPin(true)) {
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layoutHome();
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return;
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}
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}
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if (msg->has_passphrase_protection && msg->passphrase_protection) {
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if (!protectPassphrase()) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Ping cancelled");
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return;
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}
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}
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if (msg->has_message) {
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resp->has_message = true;
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memcpy(&(resp->message), &(msg->message), sizeof(resp->message));
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}
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msg_write(MessageType_MessageType_Success, resp);
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layoutHome();
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}
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void fsm_msgChangePin(ChangePin *msg)
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{
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bool removal = msg->has_remove && msg->remove;
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if (removal) {
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if (storage_hasPin()) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "remove current PIN?", NULL, NULL, NULL, NULL);
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} else {
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fsm_sendSuccess("PIN removed");
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return;
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}
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} else {
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if (storage_hasPin()) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change current PIN?", NULL, NULL, NULL, NULL);
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} else {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "set new PIN?", NULL, NULL, NULL, NULL);
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}
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}
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, removal ? "PIN removal cancelled" : "PIN change cancelled");
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layoutHome();
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return;
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}
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if (!protectPin(false)) {
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layoutHome();
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return;
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}
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if (removal) {
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storage_setPin(0);
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fsm_sendSuccess("PIN removed");
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} else {
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if (protectChangePin()) {
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fsm_sendSuccess("PIN changed");
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} else {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "PIN change failed");
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}
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}
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layoutHome();
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}
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void fsm_msgWipeDevice(WipeDevice *msg)
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{
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(void)msg;
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "wipe the device?", NULL, "All data will be lost.", NULL, NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_WipeDevice, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Wipe cancelled");
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layoutHome();
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return;
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}
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storage_reset();
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storage_reset_uuid();
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storage_commit();
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// the following does not work on Mac anyway :-/ Linux/Windows are fine, so it is not needed
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// usbReconnect(); // force re-enumeration because of the serial number change
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fsm_sendSuccess("Device wiped");
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layoutHome();
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}
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void fsm_msgFirmwareErase(FirmwareErase *msg)
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{
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(void)msg;
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fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in bootloader mode");
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}
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void fsm_msgFirmwareUpload(FirmwareUpload *msg)
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{
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(void)msg;
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fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in bootloader mode");
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}
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void fsm_msgGetEntropy(GetEntropy *msg)
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{
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "send entropy?", NULL, NULL, NULL, NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Entropy cancelled");
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layoutHome();
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return;
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}
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RESP_INIT(Entropy);
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uint32_t len = msg->size;
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if (len > 1024) {
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len = 1024;
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}
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resp->entropy.size = len;
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random_buffer(resp->entropy.bytes, len);
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msg_write(MessageType_MessageType_Entropy, resp);
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layoutHome();
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}
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void fsm_msgGetPublicKey(GetPublicKey *msg)
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{
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RESP_INIT(PublicKey);
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HDNode *node = fsm_getRootNode();
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if (!node) return;
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fsm_deriveKey(node, msg->address_n, msg->address_n_count);
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resp->node.depth = node->depth;
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resp->node.fingerprint = node->fingerprint;
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resp->node.child_num = node->child_num;
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resp->node.chain_code.size = 32;
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memcpy(resp->node.chain_code.bytes, node->chain_code, 32);
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resp->node.has_private_key = false;
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resp->node.has_public_key = true;
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resp->node.public_key.size = 33;
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memcpy(resp->node.public_key.bytes, node->public_key, 33);
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msg_write(MessageType_MessageType_PublicKey, resp);
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layoutHome();
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}
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void fsm_msgLoadDevice(LoadDevice *msg)
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{
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if (storage_isInitialized()) {
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fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Device is already initialized. Use Wipe first.");
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return;
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}
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "I take the risk", NULL, "Loading private seed", "is not recommended.", "Continue only if you", "know what you are", "doing!", NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Load cancelled");
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layoutHome();
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return;
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}
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storage_loadDevice(msg);
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storage_commit();
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fsm_sendSuccess("Device loaded");
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layoutHome();
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}
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void fsm_msgResetDevice(ResetDevice *msg)
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{
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if (storage_isInitialized()) {
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fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Device is already initialized. Use Wipe first.");
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return;
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}
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reset_init(
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msg->has_display_random && msg->display_random,
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msg->has_strength ? msg->strength : 128,
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msg->has_passphrase_protection && msg->passphrase_protection,
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msg->has_pin_protection && msg->pin_protection,
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msg->has_language ? msg->language : 0,
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msg->has_label ? msg->label : 0
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);
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}
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void fsm_msgSignTx(SignTx *msg)
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{
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if (msg->inputs_count < 1) {
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fsm_sendFailure(FailureType_Failure_Other, "Transaction must have at least one input");
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layoutHome();
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return;
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}
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if (msg->outputs_count < 1) {
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fsm_sendFailure(FailureType_Failure_Other, "Transaction must have at least one output");
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layoutHome();
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return;
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}
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if (!protectPin(true)) {
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layoutHome();
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return;
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}
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HDNode *node = fsm_getRootNode();
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if (!node) return;
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const CoinType *coin = coinByName(msg->coin_name);
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if (!coin) {
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fsm_sendFailure(FailureType_Failure_Other, "Invalid coin name");
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layoutHome();
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return;
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}
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signing_init(msg->inputs_count, msg->outputs_count, coin, node);
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}
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void fsm_msgCancel(Cancel *msg)
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{
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(void)msg;
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recovery_abort();
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signing_abort();
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}
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void fsm_msgTxAck(TxAck *msg)
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{
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if (msg->has_tx) {
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signing_txack(&(msg->tx));
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} else {
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fsm_sendFailure(FailureType_Failure_SyntaxError, "No transaction provided");
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}
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}
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void fsm_msgCipherKeyValue(CipherKeyValue *msg)
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{
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if (!msg->has_key) {
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fsm_sendFailure(FailureType_Failure_SyntaxError, "No key provided");
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return;
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}
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if (!msg->has_value) {
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fsm_sendFailure(FailureType_Failure_SyntaxError, "No value provided");
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return;
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}
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if (msg->value.size % 16) {
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fsm_sendFailure(FailureType_Failure_SyntaxError, "Value length must be a multiple of 16");
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return;
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}
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if (!protectPin(true)) {
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layoutHome();
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return;
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}
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HDNode *node = fsm_getRootNode();
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if (!node) return;
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fsm_deriveKey(node, msg->address_n, msg->address_n_count);
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bool encrypt = msg->has_encrypt && msg->encrypt;
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bool ask_on_encrypt = msg->has_ask_on_encrypt && msg->ask_on_encrypt;
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bool ask_on_decrypt = msg->has_ask_on_decrypt && msg->ask_on_decrypt;
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if ((encrypt && ask_on_encrypt) || (!encrypt && ask_on_decrypt)) {
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layoutCipherKeyValue(encrypt, msg->key);
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if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "CipherKeyValue cancelled");
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layoutHome();
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return;
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}
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}
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uint8_t data[256 + 4];
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strlcpy((char *)data, msg->key, sizeof(data));
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strlcat((char *)data, ask_on_encrypt ? "E1" : "E0", sizeof(data));
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strlcat((char *)data, ask_on_decrypt ? "D1" : "D0", sizeof(data));
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hmac_sha512(node->private_key, 32, data, strlen((char *)data), data);
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RESP_INIT(Success);
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if (encrypt) {
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aes_encrypt_ctx ctx;
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aes_encrypt_key256(data, &ctx);
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aes_cbc_encrypt(msg->value.bytes, resp->payload.bytes, msg->value.size, data + 32, &ctx);
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} else {
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aes_decrypt_ctx ctx;
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aes_decrypt_key256(data, &ctx);
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aes_cbc_decrypt(msg->value.bytes, resp->payload.bytes, msg->value.size, data + 32, &ctx);
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}
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resp->has_payload = true;
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resp->payload.size = msg->value.size;
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msg_write(MessageType_MessageType_Success, resp);
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layoutHome();
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}
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void fsm_msgClearSession(ClearSession *msg)
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{
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(void)msg;
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session_clear();
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fsm_sendSuccess("Session cleared");
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}
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void fsm_msgApplySettings(ApplySettings *msg)
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{
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if (msg->has_label && msg->has_language) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "and language to", msg->language, "?");
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} else
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if (msg->has_label) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "?", NULL, NULL);
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} else
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if (msg->has_language) {
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layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change language to", msg->language, "?", NULL, NULL);
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} else {
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fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
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return;
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}
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
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layoutHome();
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return;
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}
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if (!protectPin(true)) {
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layoutHome();
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return;
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}
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if (msg->has_label) {
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storage_setLabel(msg->label);
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}
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if (msg->has_language) {
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storage_setLanguage(msg->language);
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}
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storage_commit();
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fsm_sendSuccess("Settings applied");
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layoutHome();
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}
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void fsm_msgGetAddress(GetAddress *msg)
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{
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RESP_INIT(Address);
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HDNode *node = fsm_getRootNode();
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if (!node) return;
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const CoinType *coin = coinByName(msg->coin_name);
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if (!coin) {
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fsm_sendFailure(FailureType_Failure_Other, "Invalid coin name");
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layoutHome();
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return;
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}
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fsm_deriveKey(node, msg->address_n, msg->address_n_count);
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ecdsa_get_address(node->public_key, coin->address_type, resp->address);
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msg_write(MessageType_MessageType_Address, resp);
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layoutHome();
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}
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void fsm_msgEntropyAck(EntropyAck *msg)
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{
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if (msg->has_entropy) {
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reset_entropy(msg->entropy.bytes, msg->entropy.size);
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} else {
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reset_entropy(0, 0);
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}
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}
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|
|
|
void fsm_msgSignMessage(SignMessage *msg)
|
|
{
|
|
RESP_INIT(MessageSignature);
|
|
|
|
layoutSignMessage(msg->message.bytes, msg->message.size);
|
|
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
|
|
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Sign message cancelled");
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
if (!protectPin(true)) {
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
HDNode *node = fsm_getRootNode();
|
|
if (!node) return;
|
|
const CoinType *coin = coinByName(msg->coin_name);
|
|
if (!coin) {
|
|
fsm_sendFailure(FailureType_Failure_Other, "Invalid coin name");
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
fsm_deriveKey(node, msg->address_n, msg->address_n_count);
|
|
|
|
ecdsa_get_address(node->public_key, coin->address_type, resp->address);
|
|
layoutProgressSwipe("Signing", 0, 0);
|
|
if (transactionMessageSign(msg->message.bytes, msg->message.size, node->private_key, resp->address, resp->signature.bytes)) {
|
|
resp->has_address = true;
|
|
resp->has_signature = true;
|
|
resp->signature.size = 65;
|
|
msg_write(MessageType_MessageType_MessageSignature, resp);
|
|
} else {
|
|
fsm_sendFailure(FailureType_Failure_Other, "Error signing message");
|
|
}
|
|
layoutHome();
|
|
}
|
|
|
|
void fsm_msgVerifyMessage(VerifyMessage *msg)
|
|
{
|
|
const char *address = msg->has_address ? msg->address : 0;
|
|
layoutProgressSwipe("Verifying", 0, 0);
|
|
if (msg->signature.size == 65 && transactionMessageVerify(msg->message.bytes, msg->message.size, msg->signature.bytes, address)) {
|
|
layoutVerifyMessage(msg->message.bytes, msg->message.size);
|
|
protectButton(ButtonRequestType_ButtonRequest_Other, true);
|
|
fsm_sendSuccess("Message verified");
|
|
} else {
|
|
fsm_sendFailure(FailureType_Failure_InvalidSignature, "Invalid signature");
|
|
}
|
|
layoutHome();
|
|
}
|
|
|
|
void fsm_msgEstimateTxSize(EstimateTxSize *msg)
|
|
{
|
|
RESP_INIT(TxSize);
|
|
resp->has_tx_size = true;
|
|
resp->tx_size = transactionEstimateSize(msg->inputs_count, msg->outputs_count);
|
|
msg_write(MessageType_MessageType_TxSize, resp);
|
|
}
|
|
|
|
void fsm_msgRecoveryDevice(RecoveryDevice *msg)
|
|
{
|
|
if (storage_isInitialized()) {
|
|
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Device is already initialized. Use Wipe first.");
|
|
return;
|
|
}
|
|
recovery_init(
|
|
msg->has_word_count ? msg->word_count : 12,
|
|
msg->has_passphrase_protection && msg->passphrase_protection,
|
|
msg->has_pin_protection && msg->pin_protection,
|
|
msg->has_language ? msg->language : 0,
|
|
msg->has_label ? msg->label : 0,
|
|
msg->has_enforce_wordlist ? msg->enforce_wordlist : false
|
|
);
|
|
}
|
|
|
|
void fsm_msgWordAck(WordAck *msg)
|
|
{
|
|
recovery_word(msg->word);
|
|
}
|
|
|
|
#if DEBUG_LINK
|
|
|
|
void fsm_msgDebugLinkGetState(DebugLinkGetState *msg)
|
|
{
|
|
(void)msg;
|
|
RESP_INIT(DebugLinkState);
|
|
|
|
resp->has_layout = true;
|
|
resp->layout.size = OLED_BUFSIZE;
|
|
memcpy(resp->layout.bytes, oledGetBuffer(), OLED_BUFSIZE);
|
|
|
|
if (storage.has_pin) {
|
|
resp->has_pin = true;
|
|
strlcpy(resp->pin, storage.pin, sizeof(resp->pin));
|
|
}
|
|
|
|
resp->has_matrix = true;
|
|
strlcpy(resp->matrix, pinmatrix_get(), sizeof(resp->matrix));
|
|
|
|
resp->has_reset_entropy = true;
|
|
resp->reset_entropy.size = reset_get_int_entropy(resp->reset_entropy.bytes);
|
|
|
|
resp->has_reset_word = true;
|
|
strlcpy(resp->reset_word, reset_get_word(), sizeof(resp->reset_word));
|
|
|
|
resp->has_recovery_fake_word = true;
|
|
strlcpy(resp->recovery_fake_word, recovery_get_fake_word(), sizeof(resp->recovery_fake_word));
|
|
|
|
resp->has_recovery_word_pos = true;
|
|
resp->recovery_word_pos = recovery_get_word_pos();
|
|
|
|
if (storage.has_mnemonic) {
|
|
resp->has_mnemonic = true;
|
|
strlcpy(resp->mnemonic, storage.mnemonic, sizeof(resp->mnemonic));
|
|
}
|
|
|
|
if (storage.has_node) {
|
|
resp->has_node = true;
|
|
memcpy(&(resp->node), &(storage.node), sizeof(HDNode));
|
|
}
|
|
|
|
resp->has_passphrase_protection = true;
|
|
resp->passphrase_protection = storage.has_passphrase_protection && storage.passphrase_protection;
|
|
|
|
msg_debug_write(MessageType_MessageType_DebugLinkState, resp);
|
|
}
|
|
|
|
void fsm_msgDebugLinkStop(DebugLinkStop *msg)
|
|
{
|
|
(void)msg;
|
|
}
|
|
|
|
#endif
|