wownero/src/device_trezor/device_trezor_base.cpp

606 lines
20 KiB
C++

// Copyright (c) 2017-2020, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#include "device_trezor_base.hpp"
#include "memwipe.h"
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/regex.hpp>
namespace hw {
namespace trezor {
#ifdef WITH_DEVICE_TREZOR
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "device.trezor"
#define TREZOR_BIP44_HARDENED_ZERO 0x80000000
const uint32_t device_trezor_base::DEFAULT_BIP44_PATH[] = {0x8000002c, 0x80000080};
device_trezor_base::device_trezor_base(): m_callback(nullptr), m_last_msg_type(messages::MessageType_Success),
m_reply_with_empty_passphrase(false),
m_always_use_empty_passphrase(false),
m_seen_passphrase_entry_message(false) {
#ifdef WITH_TREZOR_DEBUGGING
m_debug = false;
#endif
}
device_trezor_base::~device_trezor_base() {
try {
disconnect();
release();
} catch(std::exception const& e){
MERROR("Could not disconnect and release: " << e.what());
}
}
/* ======================================================================= */
/* SETUP/TEARDOWN */
/* ======================================================================= */
bool device_trezor_base::reset() {
return false;
}
bool device_trezor_base::set_name(const std::string & name) {
this->m_full_name = name;
this->name = "";
auto delim = name.find(':');
if (delim != std::string::npos && delim + 1 < name.length()) {
this->name = name.substr(delim + 1);
}
return true;
}
const std::string device_trezor_base::get_name() const {
if (this->m_full_name.empty()) {
return std::string("<disconnected:").append(this->name).append(">");
}
return this->m_full_name;
}
bool device_trezor_base::init() {
if (!release()){
MERROR("Release failed");
return false;
}
return true;
}
bool device_trezor_base::release() {
try {
disconnect();
return true;
} catch(std::exception const& e){
MERROR("Release exception: " << e.what());
return false;
}
}
bool device_trezor_base::connect() {
disconnect();
// Enumerate all available devices
TREZOR_AUTO_LOCK_DEVICE();
try {
hw::trezor::t_transport_vect trans;
MDEBUG("Enumerating Trezor devices...");
enumerate(trans);
sort_transports_by_env(trans);
MDEBUG("Enumeration yielded " << trans.size() << " Trezor devices");
for (auto &cur : trans) {
MDEBUG(" device: " << *(cur.get()));
}
for (auto &cur : trans) {
std::string cur_path = cur->get_path();
if (boost::starts_with(cur_path, this->name)) {
MDEBUG("Device Match: " << cur_path);
m_transport = cur;
break;
}
}
if (!m_transport) {
MERROR("No matching Trezor device found. Device specifier: \"" + this->name + "\"");
return false;
}
m_transport->open();
#ifdef WITH_TREZOR_DEBUGGING
setup_debug();
#endif
return true;
} catch(std::exception const& e){
MERROR("Open exception: " << e.what());
return false;
}
}
bool device_trezor_base::disconnect() {
TREZOR_AUTO_LOCK_DEVICE();
m_device_session_id.clear();
m_features.reset();
m_seen_passphrase_entry_message = false;
m_reply_with_empty_passphrase = false;
m_always_use_empty_passphrase = false;
if (m_transport){
try {
m_transport->close();
m_transport = nullptr;
} catch(std::exception const& e){
MERROR("Disconnect exception: " << e.what());
m_transport = nullptr;
return false;
}
}
#ifdef WITH_TREZOR_DEBUGGING
if (m_debug_callback) {
m_debug_callback->on_disconnect();
m_debug_callback = nullptr;
}
#endif
return true;
}
/* ======================================================================= */
/* LOCKER */
/* ======================================================================= */
//lock the device for a long sequence
void device_trezor_base::lock() {
MTRACE("Ask for LOCKING for device " << this->name << " in thread ");
device_locker.lock();
MTRACE("Device " << this->name << " LOCKed");
}
//lock the device for a long sequence
bool device_trezor_base::try_lock() {
MTRACE("Ask for LOCKING(try) for device " << this->name << " in thread ");
bool r = device_locker.try_lock();
if (r) {
MTRACE("Device " << this->name << " LOCKed(try)");
} else {
MDEBUG("Device " << this->name << " not LOCKed(try)");
}
return r;
}
//unlock the device
void device_trezor_base::unlock() {
MTRACE("Ask for UNLOCKING for device " << this->name << " in thread ");
device_locker.unlock();
MTRACE("Device " << this->name << " UNLOCKed");
}
/* ======================================================================= */
/* Helpers */
/* ======================================================================= */
void device_trezor_base::require_connected() const {
if (!m_transport){
throw exc::NotConnectedException();
}
}
void device_trezor_base::require_initialized() const {
if (!m_features){
throw exc::TrezorException("Device state not initialized");
}
if (m_features->has_bootloader_mode() && m_features->bootloader_mode()){
throw exc::TrezorException("Device is in the bootloader mode");
}
if (m_features->has_firmware_present() && !m_features->firmware_present()){
throw exc::TrezorException("Device has no firmware loaded");
}
// Hard requirement on initialized field, has to be there.
if (!m_features->has_initialized() || !m_features->initialized()){
throw exc::TrezorException("Device is not initialized");
}
}
void device_trezor_base::call_ping_unsafe(){
auto pingMsg = std::make_shared<messages::management::Ping>();
pingMsg->set_message("PING");
auto success = this->client_exchange<messages::common::Success>(pingMsg); // messages::MessageType_Success
MDEBUG("Ping response " << success->message());
(void)success;
}
void device_trezor_base::test_ping(){
require_connected();
try {
this->call_ping_unsafe();
} catch(exc::TrezorException const& e){
MINFO("Trezor does not respond: " << e.what());
throw exc::DeviceNotResponsiveException(std::string("Trezor not responding: ") + e.what());
}
}
void device_trezor_base::write_raw(const google::protobuf::Message * msg){
require_connected();
CHECK_AND_ASSERT_THROW_MES(msg, "Empty message");
this->get_transport()->write(*msg);
}
GenericMessage device_trezor_base::read_raw(){
require_connected();
std::shared_ptr<google::protobuf::Message> msg_resp;
hw::trezor::messages::MessageType msg_resp_type;
this->get_transport()->read(msg_resp, &msg_resp_type);
return GenericMessage(msg_resp_type, msg_resp);
}
GenericMessage device_trezor_base::call_raw(const google::protobuf::Message * msg) {
write_raw(msg);
return read_raw();
}
bool device_trezor_base::message_handler(GenericMessage & input){
// Later if needed this generic message handler can be replaced by a pointer to
// a protocol message handler which by default points to the device class which implements
// the default handler.
if (m_last_msg_type == messages::MessageType_ButtonRequest){
on_button_pressed();
}
m_last_msg_type = input.m_type;
switch(input.m_type){
case messages::MessageType_ButtonRequest:
on_button_request(input, dynamic_cast<const messages::common::ButtonRequest*>(input.m_msg.get()));
return true;
case messages::MessageType_PassphraseRequest:
on_passphrase_request(input, dynamic_cast<const messages::common::PassphraseRequest*>(input.m_msg.get()));
return true;
case messages::MessageType_Deprecated_PassphraseStateRequest:
on_passphrase_state_request(input, dynamic_cast<const messages::common::Deprecated_PassphraseStateRequest*>(input.m_msg.get()));
return true;
case messages::MessageType_PinMatrixRequest:
on_pin_request(input, dynamic_cast<const messages::common::PinMatrixRequest*>(input.m_msg.get()));
return true;
default:
return false;
}
}
void device_trezor_base::ensure_derivation_path() noexcept {
if (m_wallet_deriv_path.empty()){
m_wallet_deriv_path.push_back(TREZOR_BIP44_HARDENED_ZERO); // default 0'
}
}
void device_trezor_base::set_derivation_path(const std::string &deriv_path){
this->m_wallet_deriv_path.clear();
if (deriv_path.empty() || deriv_path == "-"){
ensure_derivation_path();
return;
}
CHECK_AND_ASSERT_THROW_MES(deriv_path.size() <= 255, "Derivation path is too long");
std::vector<std::string> fields;
boost::split(fields, deriv_path, boost::is_any_of("/"));
CHECK_AND_ASSERT_THROW_MES(fields.size() <= 10, "Derivation path is too long");
boost::regex rgx("^([0-9]+)'?$");
boost::cmatch match;
this->m_wallet_deriv_path.reserve(fields.size());
for(const std::string & cur : fields){
const bool ok = boost::regex_match(cur.c_str(), match, rgx);
CHECK_AND_ASSERT_THROW_MES(ok, "Invalid wallet code: " << deriv_path << ". Invalid path element: " << cur);
CHECK_AND_ASSERT_THROW_MES(match[0].length() > 0, "Invalid wallet code: " << deriv_path << ". Invalid path element: " << cur);
const unsigned long cidx = std::stoul(match[0].str()) | TREZOR_BIP44_HARDENED_ZERO;
this->m_wallet_deriv_path.push_back((unsigned int)cidx);
}
}
/* ======================================================================= */
/* TREZOR PROTOCOL */
/* ======================================================================= */
bool device_trezor_base::ping() {
TREZOR_AUTO_LOCK_CMD();
if (!m_transport){
MINFO("Ping failed, device not connected");
return false;
}
try {
this->call_ping_unsafe();
return true;
} catch(std::exception const& e) {
MERROR("Ping failed, exception thrown " << e.what());
} catch(...){
MERROR("Ping failed, general exception thrown" << boost::current_exception_diagnostic_information());
}
return false;
}
void device_trezor_base::device_state_initialize_unsafe()
{
require_connected();
auto initMsg = std::make_shared<messages::management::Initialize>();
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
if (initMsg->has_session_id())
memwipe(&(*initMsg->mutable_session_id())[0], initMsg->mutable_session_id()->size());
});
if(!m_device_session_id.empty()) {
initMsg->set_allocated_session_id(new std::string(m_device_session_id.data(), m_device_session_id.size()));
}
m_features = this->client_exchange<messages::management::Features>(initMsg);
if (m_features->has_session_id()){
m_device_session_id = m_features->session_id();
} else {
m_device_session_id.clear();
}
}
void device_trezor_base::device_state_reset()
{
TREZOR_AUTO_LOCK_CMD();
device_state_initialize_unsafe();
}
#ifdef WITH_TREZOR_DEBUGGING
#define TREZOR_CALLBACK(method, ...) do { \
if (m_debug_callback) m_debug_callback->method(__VA_ARGS__); \
if (m_callback) m_callback->method(__VA_ARGS__); \
}while(0)
#define TREZOR_CALLBACK_GET(VAR, method, ...) do { \
if (m_debug_callback) VAR = m_debug_callback->method(__VA_ARGS__); \
if (m_callback) VAR = m_callback->method(__VA_ARGS__); \
}while(0)
void device_trezor_base::setup_debug(){
if (!m_debug){
return;
}
if (!m_debug_callback){
CHECK_AND_ASSERT_THROW_MES(m_transport, "Transport does not exist");
auto debug_transport = m_transport->find_debug();
if (debug_transport) {
m_debug_callback = std::make_shared<trezor_debug_callback>(debug_transport);
} else {
MDEBUG("Transport does not have debug link option");
}
}
}
#else
#define TREZOR_CALLBACK(method, ...) do { if (m_callback) m_callback->method(__VA_ARGS__); } while(0)
#define TREZOR_CALLBACK_GET(VAR, method, ...) VAR = (m_callback ? m_callback->method(__VA_ARGS__) : boost::none)
#endif
void device_trezor_base::on_button_request(GenericMessage & resp, const messages::common::ButtonRequest * msg)
{
CHECK_AND_ASSERT_THROW_MES(msg, "Empty message");
MDEBUG("on_button_request, code: " << msg->code());
TREZOR_CALLBACK(on_button_request, msg->code());
messages::common::ButtonAck ack;
write_raw(&ack);
resp = read_raw();
}
void device_trezor_base::on_button_pressed()
{
TREZOR_CALLBACK(on_button_pressed);
}
void device_trezor_base::on_pin_request(GenericMessage & resp, const messages::common::PinMatrixRequest * msg)
{
MDEBUG("on_pin_request");
CHECK_AND_ASSERT_THROW_MES(msg, "Empty message");
boost::optional<epee::wipeable_string> pin;
TREZOR_CALLBACK_GET(pin, on_pin_request);
if (!pin && m_pin){
pin = m_pin;
}
messages::common::PinMatrixAck m;
if (pin) {
m.set_allocated_pin(new std::string(pin->data(), pin->size()));
}
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
if (m.has_pin())
memwipe(&(*m.mutable_pin())[0], m.mutable_pin()->size());
});
resp = call_raw(&m);
}
void device_trezor_base::on_passphrase_request(GenericMessage & resp, const messages::common::PassphraseRequest * msg)
{
CHECK_AND_ASSERT_THROW_MES(msg, "Empty message");
MDEBUG("on_passhprase_request");
// Backward compatibility, migration clause.
if (msg->has__on_device() && msg->_on_device()){
messages::common::PassphraseAck m;
resp = call_raw(&m);
return;
}
m_seen_passphrase_entry_message = true;
bool on_device = true;
if (msg->has__on_device() && !msg->_on_device()){
on_device = false; // do not enter on device, old devices.
}
if (on_device && m_features && m_features->capabilities_size() > 0){
on_device = false;
for (auto it = m_features->capabilities().begin(); it != m_features->capabilities().end(); it++) {
if (*it == messages::management::Features::Capability_PassphraseEntry){
on_device = true;
}
}
}
boost::optional<epee::wipeable_string> passphrase;
if (m_reply_with_empty_passphrase || m_always_use_empty_passphrase) {
MDEBUG("Answering passphrase prompt with an empty passphrase, always use empty: " << m_always_use_empty_passphrase);
on_device = false;
passphrase = epee::wipeable_string("");
} else if (m_passphrase){
MWARNING("Answering passphrase prompt with a stored passphrase (do not use; passphrase can be seen by a potential malware / attacker)");
on_device = false;
passphrase = epee::wipeable_string(m_passphrase.get());
} else {
TREZOR_CALLBACK_GET(passphrase, on_passphrase_request, on_device);
}
messages::common::PassphraseAck m;
m.set_on_device(on_device);
if (!on_device) {
if (passphrase) {
m.set_allocated_passphrase(new std::string(passphrase->data(), passphrase->size()));
}
}
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
if (m.has_passphrase())
memwipe(&(*m.mutable_passphrase())[0], m.mutable_passphrase()->size());
});
resp = call_raw(&m);
}
void device_trezor_base::on_passphrase_state_request(GenericMessage & resp, const messages::common::Deprecated_PassphraseStateRequest * msg)
{
MDEBUG("on_passhprase_state_request");
CHECK_AND_ASSERT_THROW_MES(msg, "Empty message");
if (msg->has_state()) {
m_device_session_id = msg->state();
}
messages::common::Deprecated_PassphraseStateAck m;
resp = call_raw(&m);
}
#ifdef WITH_TREZOR_DEBUGGING
void device_trezor_base::wipe_device()
{
auto msg = std::make_shared<messages::management::WipeDevice>();
auto ret = client_exchange<messages::common::Success>(msg);
(void)ret;
init_device();
}
void device_trezor_base::init_device()
{
auto msg = std::make_shared<messages::management::Initialize>();
m_features = client_exchange<messages::management::Features>(msg);
}
void device_trezor_base::load_device(const std::string & mnemonic, const std::string & pin,
bool passphrase_protection, const std::string & label, const std::string & language,
bool skip_checksum, bool expand)
{
if (m_features && m_features->initialized()){
throw std::runtime_error("Device is initialized already. Call device.wipe() and try again.");
}
auto msg = std::make_shared<messages::management::LoadDevice>();
msg->add_mnemonics(mnemonic);
msg->set_pin(pin);
msg->set_passphrase_protection(passphrase_protection);
msg->set_label(label);
msg->set_language(language);
msg->set_skip_checksum(skip_checksum);
auto ret = client_exchange<messages::common::Success>(msg);
(void)ret;
init_device();
}
trezor_debug_callback::trezor_debug_callback(std::shared_ptr<Transport> & debug_transport){
m_debug_link = std::make_shared<DebugLink>();
m_debug_link->init(debug_transport);
}
void trezor_debug_callback::on_button_request(uint64_t code) {
if (m_debug_link) m_debug_link->press_yes();
}
boost::optional<epee::wipeable_string> trezor_debug_callback::on_pin_request() {
return boost::none;
}
boost::optional<epee::wipeable_string> trezor_debug_callback::on_passphrase_request(bool & on_device) {
on_device = true;
return boost::none;
}
void trezor_debug_callback::on_passphrase_state_request(const std::string &state) {
}
void trezor_debug_callback::on_disconnect(){
if (m_debug_link) m_debug_link->close();
}
#endif
#endif //WITH_DEVICE_TREZOR
}}