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device_trezor: wipe string fields properly

This commit is contained in:
anon 2021-01-20 20:45:51 +00:00 committed by selsta
parent 25670398b1
commit c6e1d7bcdf
1 changed files with 9 additions and 20 deletions
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29
src/device_trezor/device_trezor_base.cpp
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@ -365,15 +365,14 @@ namespace trezor {
void device_trezor_base::device_state_initialize_unsafe()
{
require_connected();
std::string tmp_session_id;
auto initMsg = std::make_shared<messages::management::Initialize>();
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
memwipe(&tmp_session_id[0], tmp_session_id.size());
if (initMsg->has_session_id())
memwipe(&(*initMsg->mutable_session_id())[0], initMsg->mutable_session_id()->size());
});
if(!m_device_session_id.empty()) {
tmp_session_id.assign(m_device_session_id.data(), m_device_session_id.size());
initMsg->set_allocated_session_id(&tmp_session_id);
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);
@ -382,8 +381,6 @@ namespace trezor {
} else {
m_device_session_id.clear();
}
initMsg->release_session_id();
}
void device_trezor_base::device_state_reset()
@ -453,18 +450,14 @@ namespace trezor {
pin = m_pin;
}
std::string pin_field;
messages::common::PinMatrixAck m;
if (pin) {
pin_field.assign(pin->data(), pin->size());
m.set_allocated_pin(&pin_field);
m.set_allocated_pin(new std::string(pin->data(), pin->size()));
}
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
m.release_pin();
if (!pin_field.empty()){
memwipe(&pin_field[0], pin_field.size());
}
if (m.has_pin())
memwipe(&(*m.mutable_pin())[0], m.mutable_pin()->size());
});
resp = call_raw(&m);
@ -499,7 +492,6 @@ namespace trezor {
boost::optional<epee::wipeable_string> passphrase;
TREZOR_CALLBACK_GET(passphrase, on_passphrase_request, on_device);
std::string passphrase_field;
messages::common::PassphraseAck m;
m.set_on_device(on_device);
if (!on_device) {
@ -512,16 +504,13 @@ namespace trezor {
}
if (passphrase) {
passphrase_field.assign(passphrase->data(), passphrase->size());
m.set_allocated_passphrase(&passphrase_field);
m.set_allocated_passphrase(new std::string(passphrase->data(), passphrase->size()));
}
}
const auto data_cleaner = epee::misc_utils::create_scope_leave_handler([&]() {
m.release_passphrase();
if (!passphrase_field.empty()){
memwipe(&passphrase_field[0], passphrase_field.size());
}
if (m.has_passphrase())
memwipe(&(m.mutable_passphrase())[0], m.mutable_passphrase()->size());
});
resp = call_raw(&m);