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oxen-core/src/device/device_ledger.cpp
Jason Rhinelander 438f403c01 Don't invoke cryptonote_core functions from device code 
We can't call cryptonote::add_tx_secret_key_to_tx_extra from `device`
code because that isn't necessarily available in `device` (though for
some odd reason this only actually showed up on the i386 build).

This amends the call to just get the secret key, leaving the actual job
of adding it to tx.extra to the caller (which is a cleaner way to do it
anyway).
2020-12-14 11:51:29 -04:00

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// Copyright (c) 2017-2019, The Monero Project
// Copyright (c) 2018, The Loki 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 "version.h"
#include "device_ledger.hpp"
#include "ringct/rctOps.h"
#include "cryptonote_basic/account.h"
#include "cryptonote_basic/subaddress_index.h"
#include "cryptonote_core/cryptonote_tx_utils.h"
#include "common/lock.h"
#include "common/varint.h"
#include <chrono>
#include <boost/endian/conversion.hpp>
#ifdef DEBUG_HWDEVICE
#include <sodium/crypto_generichash.h>
#endif
namespace hw {
namespace ledger {
#ifdef WITH_DEVICE_LEDGER
#undef LOKI_DEFAULT_LOG_CATEGORY
#define LOKI_DEFAULT_LOG_CATEGORY "device.ledger"
/* ===================================================================== */
/* === Debug ==== */
/* ===================================================================== */
namespace {
bool apdu_verbose = true;
#define LEDGER_STATUS(status) {status, #status##sv}
constexpr std::pair<unsigned int, std::string_view> status_codes[] = {
LEDGER_STATUS(SW_SECURITY_PIN_LOCKED),
LEDGER_STATUS(SW_SECURITY_LOAD_KEY),
LEDGER_STATUS(SW_SECURITY_COMMITMENT_CONTROL),
LEDGER_STATUS(SW_SECURITY_AMOUNT_CHAIN_CONTROL),
LEDGER_STATUS(SW_SECURITY_COMMITMENT_CHAIN_CONTROL),
LEDGER_STATUS(SW_SECURITY_OUTKEYS_CHAIN_CONTROL),
LEDGER_STATUS(SW_SECURITY_MAXOUTPUT_REACHED),
LEDGER_STATUS(SW_SECURITY_HMAC),
LEDGER_STATUS(SW_SECURITY_RANGE_VALUE),
LEDGER_STATUS(SW_SECURITY_INTERNAL),
LEDGER_STATUS(SW_SECURITY_MAX_SIGNATURE_REACHED),
LEDGER_STATUS(SW_SECURITY_PREFIX_HASH),
LEDGER_STATUS(SW_SECURITY_LOCKED),
LEDGER_STATUS(SW_COMMAND_NOT_ALLOWED),
LEDGER_STATUS(SW_SUBCOMMAND_NOT_ALLOWED),
LEDGER_STATUS(SW_DENY),
LEDGER_STATUS(SW_KEY_NOT_SET),
LEDGER_STATUS(SW_WRONG_DATA),
LEDGER_STATUS(SW_WRONG_DATA_RANGE),
LEDGER_STATUS(SW_IO_FULL),
LEDGER_STATUS(SW_CLIENT_NOT_SUPPORTED),
LEDGER_STATUS(SW_WRONG_P1P2),
LEDGER_STATUS(SW_INS_NOT_SUPPORTED),
LEDGER_STATUS(SW_PROTOCOL_NOT_SUPPORTED),
LEDGER_STATUS(SW_UNKNOWN),
};
std::string status_string(unsigned int code)
{
for (auto& [code_, str] : status_codes)
if (code_ == code)
return std::string{str};
if ((code & 0xff00) == SW_WRONG_LENGTH)
return "SW_WRONG_LENGTH(" + std::to_string(code & 0xff) + ")";
return "UNKNOWN"s;
}
} // anon namespace
void set_apdu_verbose(bool verbose) {
apdu_verbose = verbose;
}
#ifdef DEBUG_HWDEVICE
crypto::secret_key dbg_viewkey;
crypto::secret_key dbg_spendkey;
#endif
/* ===================================================================== */
/* === hmacmap ==== */
/* ===================================================================== */
SecHMAC::SecHMAC(const uint8_t s[32], const uint8_t h[32]) {
std::memcpy(sec, s, 32);
std::memcpy(hmac, h, 32);
}
void HMACmap::find_mac(const uint8_t sec[32], uint8_t hmac[32]) {
size_t sz = hmacs.size();
log_hexbuffer("find_mac: lookup for ", sec,32);
for (size_t i=0; i<sz; i++) {
log_hexbuffer("find_mac: - try ", hmacs[i].sec, 32);
if (memcmp(sec, hmacs[i].sec, 32) == 0) {
std::memcpy(hmac, hmacs[i].hmac, 32);
log_hexbuffer("find_mac: - found ", hmacs[i].hmac, 32);
return;
}
}
throw std::runtime_error("Protocol error: try to send untrusted secret");
}
void HMACmap::add_mac(const uint8_t sec[32], const uint8_t hmac[32]) {
log_hexbuffer("add_mac: sec ", sec, 32);
log_hexbuffer("add_mac: hmac ", hmac, 32);
hmacs.push_back(SecHMAC(sec,hmac));
}
void HMACmap::clear() {
hmacs.clear();
}
/* ===================================================================== */
/* === Keymap ==== */
/* ===================================================================== */
ABPkeys::ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, const bool is_change, const bool need_additional_txkeys, const size_t real_output_index, const rct::key& P, const rct::key& AK) {
Aout = A;
Bout = B;
is_subaddress = is_subaddr;
is_change_address = is_change;
additional_key = need_additional_txkeys;
index = real_output_index;
Pout = P;
AKout = AK;
}
ABPkeys::ABPkeys(const ABPkeys& keys) {
Aout = keys.Aout;
Bout = keys.Bout;
is_subaddress = keys.is_subaddress;
is_change_address = keys.is_change_address;
additional_key = keys.additional_key;
index = keys.index;
Pout = keys.Pout;
AKout = keys.AKout;
}
ABPkeys &ABPkeys::operator=(const ABPkeys& keys) {
if (&keys == this)
return *this;
Aout = keys.Aout;
Bout = keys.Bout;
is_subaddress = keys.is_subaddress;
is_change_address = keys.is_change_address;
additional_key = keys.additional_key;
index = keys.index;
Pout = keys.Pout;
AKout = keys.AKout;
return *this;
}
bool Keymap::find(const rct::key& P, ABPkeys& keys) const {
size_t sz = ABP.size();
for (size_t i=0; i<sz; i++) {
if (ABP[i].Pout == P) {
keys = ABP[i];
return true;
}
}
return false;
}
void Keymap::add(const ABPkeys& keys) {
ABP.push_back(keys);
}
void Keymap::clear() {
ABP.clear();
}
#ifdef DEBUG_HWDEVICE
void Keymap::log() {
log_message("keymap", "content");
size_t sz = ABP.size();
for (size_t i=0; i<sz; i++) {
log_message(" keymap", std::to_string(i));
log_hexbuffer(" Aout", ABP[i].Aout.bytes, 32);
log_hexbuffer(" Bout", ABP[i].Bout.bytes, 32);
log_message (" is_sub", std::to_string(ABP[i].is_subaddress));
log_message (" index", std::to_string(ABP[i].index));
log_hexbuffer(" Pout", ABP[i].Pout.bytes, 32);
}
}
#endif
/* ===================================================================== */
/* === Internal Helpers ==== */
/* ===================================================================== */
static bool is_fake_view_key(const crypto::secret_key &sec) {
return sec == crypto::null_skey;
}
bool operator==(const crypto::key_derivation &d0, const crypto::key_derivation &d1) {
static_assert(sizeof(crypto::key_derivation) == 32, "key_derivation must be 32 bytes");
return !crypto_verify_32(reinterpret_cast<const unsigned char*>(&d0), reinterpret_cast<const unsigned char*>(&d1));
}
/* ===================================================================== */
/* === Device ==== */
/* ===================================================================== */
static int device_id = 0;
#define PROTOCOL_VERSION 1
#ifdef NDEBUG
#define LEDGER_INS(name, code) \
static constexpr uint8_t INS_##name = code
#else
// Reverse lookup table for commands -> names, only available in debug compilations
static std::unordered_map<uint8_t, std::string_view> debug_ins_names;
static uint8_t debug_record_ins(uint8_t code, std::string_view name) { debug_ins_names.emplace(code, name); return code; }
#define LEDGER_INS(name, code) \
static const uint8_t INS_##name = debug_record_ins(code, #name##sv)
#endif
LEDGER_INS(RESET, 0x02);
LEDGER_INS(GET_NETWORK, 0x10);
LEDGER_INS(GET_KEY, 0x20);
LEDGER_INS(DISPLAY_ADDRESS, 0x21);
LEDGER_INS(PUT_KEY, 0x22);
LEDGER_INS(GET_CHACHA8_PREKEY, 0x24);
LEDGER_INS(VERIFY_KEY, 0x26);
LEDGER_INS(SECRET_KEY_TO_PUBLIC_KEY, 0x30);
LEDGER_INS(GEN_KEY_DERIVATION, 0x32);
LEDGER_INS(DERIVATION_TO_SCALAR, 0x34);
LEDGER_INS(DERIVE_PUBLIC_KEY, 0x36);
LEDGER_INS(DERIVE_SECRET_KEY, 0x38);
LEDGER_INS(GEN_KEY_IMAGE, 0x3A);
LEDGER_INS(SECRET_KEY_ADD, 0x3C);
LEDGER_INS(SECRET_KEY_SUB, 0x3E);
LEDGER_INS(GENERATE_KEYPAIR, 0x40);
LEDGER_INS(SECRET_SCAL_MUL_KEY, 0x42);
LEDGER_INS(SECRET_SCAL_MUL_BASE, 0x44);
LEDGER_INS(DERIVE_SUBADDRESS_PUBLIC_KEY, 0x46);
LEDGER_INS(GET_SUBADDRESS, 0x48);
LEDGER_INS(GET_SUBADDRESS_SPEND_PUBLIC_KEY, 0x4A);
LEDGER_INS(GET_SUBADDRESS_SECRET_KEY, 0x4C);
LEDGER_INS(OPEN_TX, 0x70);
LEDGER_INS(SET_SIGNATURE_MODE, 0x72);
LEDGER_INS(GET_ADDITIONAL_KEY, 0x74);
LEDGER_INS(GET_TX_SECRET_KEY, 0x75);
LEDGER_INS(ENCRYPT_PAYMENT_ID, 0x76);
LEDGER_INS(GEN_COMMITMENT_MASK, 0x77);
LEDGER_INS(BLIND, 0x78);
LEDGER_INS(UNBLIND, 0x7A);
LEDGER_INS(GEN_TXOUT_KEYS, 0x7B);
LEDGER_INS(PREFIX_HASH, 0x7D);
LEDGER_INS(VALIDATE, 0x7C);
LEDGER_INS(CLSAG, 0x7F);
LEDGER_INS(CLOSE_TX, 0x80);
LEDGER_INS(GET_TX_PROOF, 0xA0);
LEDGER_INS(GEN_UNLOCK_SIGNATURE, 0xA2);
LEDGER_INS(GEN_LNS_SIGNATURE, 0xA3);
LEDGER_INS(GEN_KEY_IMAGE_SIGNATURE, 0xA4);
LEDGER_INS(GET_RESPONSE, 0xc0);
#define OPTION_MORE_DATA 0x80
// When we have to send a bunch of data to be keccak hashed we send in chunks of this size; we
// could go up to 254, but Keccak uses 136-byte chunks so it makes some sense to send at that
// size.
constexpr size_t KECCAK_HASH_CHUNK_SIZE = 136;
static_assert(KECCAK_HASH_CHUNK_SIZE <= 254, "Max keccak data chunk size exceeds the protocol limit");
constexpr size_t BLAKE2B_HASH_CHUNK_SIZE = 128;
static_assert(BLAKE2B_HASH_CHUNK_SIZE <= 254, "Max BLAKE2b data chunk size exceeds the protocol limit");
device_ledger::device_ledger(): hw_device(0x0101, 0x05, 64, 2000) {
id = device_id++;
reset_buffer();
mode = NONE;
has_view_key = false;
tx_in_progress = false;
MDEBUG("Device " << id << " Created");
}
device_ledger::~device_ledger() {
release();
MDEBUG("Device " << id << " Destroyed");
}
/* ======================================================================= */
/* LOCKER */
/* ======================================================================= */
//lock the device for a long sequence
void device_ledger::lock() {
MDEBUG("Ask for LOCKING for device " << name << " in thread ");
device_locker.lock();
MDEBUG("Device " << name << " LOCKed");
}
//lock the device for a long sequence
bool device_ledger::try_lock() {
MDEBUG("Ask for LOCKING(try) for device " << name << " in thread ");
bool r = device_locker.try_lock();
MDEBUG("Device " << name << (r ? "" : " not") << " LOCKed(try)");
return r;
}
//unlock the device after a long sequence
void device_ledger::unlock() {
MDEBUG("Ask for UNLOCKING for device " << name << " in thread ");
device_locker.unlock();
MDEBUG("Device " << name << " UNLOCKed");
}
/* ======================================================================= */
/* IO */
/* ======================================================================= */
#define IO_SW_DENY 0x6982
#define IO_SECRET_KEY 0x02
void device_ledger::logCMD() {
if (apdu_verbose) {
std::ostringstream cmd;
cmd << std::hex << std::setfill('0');
cmd << "v=0x" << std::setw(2) << +buffer_send[0];
cmd << " i=0x" << std::setw(2) << +buffer_send[1];
#ifndef NDEBUG
if (auto it = debug_ins_names.find(buffer_send[1]); it != debug_ins_names.end())
cmd << '[' << it->second << ']';
#endif
cmd << " p=(0x" << std::setw(2) << +buffer_send[2] << ",0x" << std::setw(2) << +buffer_send[3] << ')';
cmd << " sz=0x" << std::setw(2) << +buffer_send[4] << '[' << std::to_string(buffer_send[4]) << "] ";
MDEBUG("CMD: " << cmd.str() << lokimq::to_hex(buffer_send + 5, buffer_send + length_send));
last_cmd = std::chrono::steady_clock::now();
}
}
void device_ledger::logRESP() {
if (apdu_verbose)
MDEBUG("RESP (+" << std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - last_cmd).count() << "ms): "
<< lokimq::to_hex(std::string_view{reinterpret_cast<const char*>(&sw), sizeof(sw)})
<< ' ' << lokimq::to_hex(buffer_recv, buffer_recv + length_recv));
}
int device_ledger::set_command_header(unsigned char ins, unsigned char p1, unsigned char p2) {
reset_buffer();
buffer_send[0] = PROTOCOL_VERSION;
buffer_send[1] = ins;
buffer_send[2] = p1;
buffer_send[3] = p2;
buffer_send[4] = 0x00;
return 5;
}
int device_ledger::set_command_header_noopt(unsigned char ins, unsigned char p1, unsigned char p2) {
int offset = set_command_header(ins, p1, p2);
buffer_send[offset++] = 0; // options
buffer_send[4] = offset - 5;
return offset;
}
void device_ledger::send_simple(unsigned char ins, unsigned char p1) {
length_send = set_command_header_noopt(ins, p1);
bool wait = ins == INS_GET_KEY && p1 == IO_SECRET_KEY;
exchange(wait);
}
void device_ledger::send_bytes(const void* buf, size_t size, int& offset) {
CHECK_AND_ASSERT_THROW_MES(offset + size <= BUFFER_SEND_SIZE, "send_bytes: out of bounds write");
std::memmove(buffer_send+offset, buf, size);
offset += size;
}
void device_ledger::receive_bytes(void* dest, size_t size, int& offset) {
CHECK_AND_ASSERT_THROW_MES(offset + size <= BUFFER_RECV_SIZE, "receive_bytes: out of bounds read");
std::memmove(dest, buffer_recv+offset, size);
offset += size;
}
void device_ledger::receive_bytes(void* dest, size_t size) {
int offset = 0;
receive_bytes(dest, size, offset);
}
void device_ledger::send_u32(uint32_t x, int& offset) {
boost::endian::native_to_big_inplace(x);
send_bytes(&x, 4, offset);
}
void device_ledger::send_u16(uint16_t x, int& offset) {
boost::endian::native_to_big_inplace(x);
send_bytes(&x, 2, offset);
}
uint32_t device_ledger::receive_u32(int& offset) {
uint32_t x;
receive_bytes(&x, 4, offset);
boost::endian::big_to_native_inplace(x);
return x;
}
uint32_t device_ledger::receive_u32() {
int offset = 0;
return receive_u32(offset);
}
void device_ledger::send_secret(const unsigned char sec[32], int &offset) {
MDEBUG("send_secret: " << tx_in_progress);
send_bytes(sec, 32, offset);
if (tx_in_progress) {
CHECK_AND_ASSERT_THROW_MES(offset + 32 <= BUFFER_SEND_SIZE, "send_secret: out of bounds write (mac)");
hmac_map.find_mac((uint8_t*)sec, buffer_send+offset);
offset += 32;
}
}
void device_ledger::receive_secret(unsigned char sec[32], int &offset) {
MDEBUG("receive_secret: " << tx_in_progress);
receive_bytes(sec, 32, offset);
if (tx_in_progress) {
CHECK_AND_ASSERT_THROW_MES(offset + 32 <= BUFFER_RECV_SIZE, "receive_secret: out of bounds read (mac)");
hmac_map.add_mac((uint8_t*)sec, buffer_recv+offset);
offset += 32;
}
}
void device_ledger::send_finish(int& offset) {
buffer_send[4] = offset-5;
length_send = offset;
offset = 0;
}
unsigned int device_ledger::finish_and_exchange(int& offset, bool wait_on_input) {
send_finish(offset);
return exchange(wait_on_input);
}
bool device_ledger::reset() {
reset_buffer();
int offset = set_command_header_noopt(INS_RESET);
CHECK_AND_ASSERT_THROW_MES(offset + LOKI_VERSION_STR.size() <= BUFFER_SEND_SIZE, "LOKI_VERSION_STR is too long");
send_bytes(LOKI_VERSION_STR.data(), LOKI_VERSION_STR.size(), offset);
finish_and_exchange(offset);
CHECK_AND_ASSERT_THROW_MES(length_recv>=3, "Communication error, less than three bytes received. Check your application version.");
unsigned int device_version = 0;
device_version = VERSION(buffer_recv[0], buffer_recv[1], buffer_recv[2]);
CHECK_AND_ASSERT_THROW_MES (device_version >= MINIMAL_APP_VERSION,
"Unsupported device application version: " << VERSION_MAJOR(device_version)<<"."<<VERSION_MINOR(device_version)<<"."<<VERSION_MICRO(device_version) <<
" At least " << MINIMAL_APP_VERSION_MAJOR<<"."<<MINIMAL_APP_VERSION_MINOR<<"."<<MINIMAL_APP_VERSION_MICRO<<" is required.");
return true;
}
unsigned int device_ledger::exchange(bool wait_on_input) {
logCMD();
length_recv = hw_device.exchange(buffer_send, length_send, buffer_recv, BUFFER_SEND_SIZE, wait_on_input);
CHECK_AND_ASSERT_THROW_MES(length_recv >= 2, "Communication error, less than two bytes received");
length_recv -= 2;
sw = (buffer_recv[length_recv] << 8) | buffer_recv[length_recv+1];
logRESP();
// If we are waiting on input then we also want to be able to return a DENY
if (wait_on_input && sw == IO_SW_DENY)
return sw;
CHECK_AND_ASSERT_THROW_MES(sw == SW_OK,
"Wrong Device Status: " << "0x" << std::hex << sw << " (" << status_string(sw) << "), " <<
"EXPECTED 0x" << std::hex << SW_OK << " (" << status_string(SW_OK) << "), ");
return sw;
}
void device_ledger::reset_buffer() {
length_send = 0;
std::memset(buffer_send, 0, BUFFER_SEND_SIZE);
length_recv = 0;
std::memset(buffer_recv, 0, BUFFER_RECV_SIZE);
}
/* ======================================================================= */
/* SETUP/TEARDOWN */
/* ======================================================================= */
bool device_ledger::set_name(std::string_view name) {
this->name = name;
return true;
}
std::string device_ledger::get_name() const {
if (!connected())
return "<disconnected:" + name + ">";
return name;
}
bool device_ledger::init() {
#ifdef DEBUG_HWDEVICE
debug_device = &hw::get_device("default");
#endif
release();
hw_device.init();
MDEBUG("Device " << id <<" HIDUSB inited");
return true;
}
static const std::vector<hw::io::hid_conn_params> known_devices {
{0x2c97, 0x0001, 0, 0xffa0},
{0x2c97, 0x0004, 0, 0xffa0},
};
bool device_ledger::connect() {
disconnect();
hw_device.connect(known_devices);
reset();
check_network_type();
#ifdef DEBUG_HWDEVICE
cryptonote::account_public_address pubkey;
get_public_address(pubkey);
#endif
crypto::secret_key vkey;
crypto::secret_key skey;
get_secret_keys(vkey,skey);
return true;
}
bool device_ledger::connected() const {
return hw_device.connected();
}
bool device_ledger::disconnect() {
hw_device.disconnect();
return true;
}
bool device_ledger::release() {
disconnect();
hw_device.release();
return true;
}
static std::string nettype_string(cryptonote::network_type n) {
switch (n) {
case cryptonote::network_type::MAINNET: return "mainnet";
case cryptonote::network_type::TESTNET: return "testnet";
case cryptonote::network_type::DEVNET: return "devnet";
case cryptonote::network_type::FAKECHAIN: return "fakenet";
default: return "(unknown)";
}
}
void device_ledger::check_network_type() {
auto locks = tools::unique_locks(device_locker, command_locker);
send_simple(INS_GET_NETWORK);
std::string coin{reinterpret_cast<const char*>(buffer_recv), 4};
auto device_nettype = static_cast<cryptonote::network_type>(buffer_recv[4]);
MDEBUG("Ledger wallet is set to " << coin << " " << nettype_string(device_nettype));
if (coin != COIN_NETWORK)
throw std::runtime_error{"Invalid wallet app: expected " + std::string{COIN_NETWORK} + ", got " + coin};
if (device_nettype != nettype)
throw std::runtime_error{"Ledger wallet is set to the wrong network type: expected " + nettype_string(nettype)
+ " but the device is set to " + nettype_string(device_nettype)};
}
void device_ledger::set_network_type(cryptonote::network_type set_nettype) {
nettype = set_nettype;
}
bool device_ledger::set_mode(device_mode mode) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset;
switch(mode) {
case TRANSACTION_CREATE_REAL:
case TRANSACTION_CREATE_FAKE:
offset = set_command_header_noopt(INS_SET_SIGNATURE_MODE, 1);
buffer_send[offset++] = mode;
finish_and_exchange(offset);
this->mode = mode;
break;
case TRANSACTION_PARSE:
case NONE:
this->mode = mode;
break;
default:
CHECK_AND_ASSERT_THROW_MES(false, " device_ledger::set_mode(unsigned int mode): invalid mode: "<<mode);
}
MDEBUG("Switch to mode: " <<mode);
return device::set_mode(mode);
}
/* ======================================================================= */
/* WALLET & ADDRESS */
/* ======================================================================= */
bool device_ledger::get_public_address(cryptonote::account_public_address &pubkey){
auto locks = tools::unique_locks(device_locker, command_locker);
send_simple(INS_GET_KEY, 1);
int offset = 0;
receive_bytes(pubkey.m_view_public_key.data, 32, offset);
receive_bytes(pubkey.m_spend_public_key.data, 32, offset);
return true;
}
bool device_ledger::get_secret_keys(crypto::secret_key& vkey, crypto::secret_key& skey) {
auto locks = tools::unique_locks(device_locker, command_locker);
//secret key are represented as fake key on the wallet side
memcpy(vkey.data, dummy_view_key, 32);
memcpy(skey.data, dummy_spend_key, 32);
//spcialkey, normal conf handled in decrypt
send_simple(INS_GET_KEY, 0x02);
//View key is retrieved, if allowed, to speed up blockchain parsing
receive_bytes(viewkey.data, 32);
has_view_key = !is_fake_view_key(viewkey);
MDEBUG((has_view_key ? "Have view key" : "Have no view key"));
#ifdef DEBUG_HWDEVICE
send_simple(INS_GET_KEY, 0x04);
int offset = 0;
receive_bytes(dbg_viewkey.data, 32, offset);
receive_bytes(dbg_spendkey.data, 32, offset);
#endif
return true;
}
bool device_ledger::generate_chacha_key(const cryptonote::account_keys &keys, crypto::chacha_key &key, uint64_t kdf_rounds) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
crypto::chacha_key key_x;
debug_device->generate_chacha_key(hw::ledger::decrypt(keys), key_x, kdf_rounds);
#endif
send_simple(INS_GET_CHACHA8_PREKEY);
char prekey[200];
receive_bytes(prekey, 200);
crypto::generate_chacha_key_prehashed(prekey, sizeof(prekey), key, kdf_rounds);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("generate_chacha_key_prehashed", "key", key_x.data(), key.data());
#endif
return true;
}
void device_ledger::display_address(const cryptonote::subaddress_index& index, const std::optional<crypto::hash8> &payment_id) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset = set_command_header_noopt(INS_DISPLAY_ADDRESS, payment_id?1:0);
//index
send_bytes(&index, sizeof(index), offset);
//payment ID
send_bytes(payment_id ? payment_id->data : crypto::null_hash8.data, 8, offset);
CHECK_AND_ASSERT_THROW_MES(finish_and_exchange(offset, true) == SW_OK, "Timeout/Error on display address.");
}
/* ======================================================================= */
/* SUB ADDRESS */
/* ======================================================================= */
bool device_ledger::derive_subaddress_public_key(const crypto::public_key &pub, const crypto::key_derivation &derivation, const std::size_t output_index, crypto::public_key &derived_pub){
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
crypto::key_derivation derivation_x =
(mode == TRANSACTION_PARSE && has_view_key) ? derivation : hw::ledger::decrypt(derivation);
log_hexbuffer("derive_subaddress_public_key: [[IN]] pub ", pub.data, 32);
log_hexbuffer("derive_subaddress_public_key: [[IN]] derivation", derivation_x.data, 32);
log_message( "derive_subaddress_public_key: [[IN]] index ", std::to_string(output_index));
crypto::public_key derived_pub_x;
debug_device->derive_subaddress_public_key(pub, derivation_x, output_index, derived_pub_x);
log_hexbuffer("derive_subaddress_public_key: [[OUT]] derived_pub", derived_pub_x.data, 32);
#endif
if (mode == TRANSACTION_PARSE && has_view_key) {
//If we are in TRANSACTION_PARSE, the given derivation has been retrieved uncrypted (wihtout the help
//of the device), so continue that way.
MDEBUG("derive_subaddress_public_key : PARSE mode with known viewkey");
crypto::derive_subaddress_public_key(pub, derivation, output_index, derived_pub);
} else {
int offset = set_command_header_noopt(INS_DERIVE_SUBADDRESS_PUBLIC_KEY);
//pub
send_bytes(pub.data, 32, offset);
//derivation
send_secret(derivation.data, offset);
//index
send_u32(output_index, offset);
finish_and_exchange(offset);
//pub key
receive_bytes(derived_pub.data, 32);
}
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("derive_subaddress_public_key", "derived_pub", derived_pub_x.data, derived_pub.data);
#endif
return true;
}
crypto::public_key device_ledger::get_subaddress_spend_public_key(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) {
auto locks = tools::unique_locks(device_locker, command_locker);
crypto::public_key D;
#ifdef DEBUG_HWDEVICE
const cryptonote::account_keys keys_x = hw::ledger::decrypt(keys);
log_hexbuffer("get_subaddress_spend_public_key: [[IN]] keys.m_view_secret_key ", keys_x.m_view_secret_key.data, 32);
log_hexbuffer("get_subaddress_spend_public_key: [[IN]] keys.m_spend_secret_key", keys_x.m_spend_secret_key.data, 32);
log_message ("get_subaddress_spend_public_key: [[IN]] index ", std::to_string(index.major)+"."+std::to_string(index.minor));
crypto::public_key D_x = debug_device->get_subaddress_spend_public_key(keys_x, index);
log_hexbuffer("get_subaddress_spend_public_key: [[OUT]] derivation ", D_x.data, 32);
#endif
if (index.is_zero()) {
D = keys.m_account_address.m_spend_public_key;
} else {
int offset = set_command_header_noopt(INS_GET_SUBADDRESS_SPEND_PUBLIC_KEY);
//index
static_assert(sizeof(cryptonote::subaddress_index) == 8);
send_bytes(&index, sizeof(index), offset);
finish_and_exchange(offset);
receive_bytes(D.data, 32);
}
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("get_subaddress_spend_public_key", "D", D_x.data, D.data);
#endif
return D;
}
std::vector<crypto::public_key> device_ledger::get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) {
std::vector<crypto::public_key> pkeys;
cryptonote::subaddress_index index{account, begin};
for (uint32_t idx = begin; idx < end; ++idx) {
index.minor = idx;
pkeys.push_back(get_subaddress_spend_public_key(keys, index));
}
return pkeys;
}
cryptonote::account_public_address device_ledger::get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) {
auto locks = tools::unique_locks(device_locker, command_locker);
cryptonote::account_public_address address;
#ifdef DEBUG_HWDEVICE
const cryptonote::account_keys keys_x = hw::ledger::decrypt(keys);
log_hexbuffer("get_subaddress: [[IN]] keys.m_view_secret_key ", keys_x.m_view_secret_key.data, 32);
log_hexbuffer("get_subaddress: [[IN]] keys.m_view_public_key", keys_x.m_account_address.m_view_public_key.data, 32);
log_hexbuffer("get_subaddress: [[IN]] keys.m_spend_secret_key ", keys_x.m_spend_secret_key.data, 32);
log_hexbuffer("get_subaddress: [[IN]] keys.m_spend_public_key", keys_x.m_account_address.m_spend_public_key.data, 32);
log_message( "get_subaddress: [[IN]] index ", std::to_string(index.major)+"."+std::to_string(index.minor));
cryptonote::account_public_address address_x = debug_device->get_subaddress(keys_x, index);
log_hexbuffer("get_subaddress: [[OUT]] keys.m_view_public_key ", address_x.m_view_public_key.data, 32);
log_hexbuffer("get_subaddress: [[OUT]] keys.m_spend_public_key", address_x.m_spend_public_key.data, 32);
#endif
if (index.is_zero()) {
address = keys.m_account_address;
} else {
int offset = set_command_header_noopt(INS_GET_SUBADDRESS);
//index
static_assert(sizeof(cryptonote::subaddress_index) == 8);
send_bytes(&index, sizeof(index), offset);
finish_and_exchange(offset);
offset = 0;
receive_bytes(address.m_view_public_key.data, 32, offset);
receive_bytes(address.m_spend_public_key.data, 32, offset);
}
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("get_subaddress", "address.m_view_public_key.data", address_x.m_view_public_key.data, address.m_view_public_key.data);
hw::ledger::check32("get_subaddress", "address.m_spend_public_key.data", address_x.m_spend_public_key.data, address.m_spend_public_key.data);
#endif
return address;
}
crypto::secret_key device_ledger::get_subaddress_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) {
auto locks = tools::unique_locks(device_locker, command_locker);
crypto::secret_key sub_sec;
#ifdef DEBUG_HWDEVICE
const crypto::secret_key sec_x = hw::ledger::decrypt(sec);
log_message ("get_subaddress_secret_key: [[IN]] index ", std::to_string(index.major)+"."+std::to_string(index.minor));
log_hexbuffer("get_subaddress_secret_key: [[IN]] sec ", sec_x.data, 32);
crypto::secret_key sub_sec_x = debug_device->get_subaddress_secret_key(sec_x, index);
log_hexbuffer("get_subaddress_secret_key: [[OUT]] sub_sec", sub_sec_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_GET_SUBADDRESS_SECRET_KEY);
//sec
send_secret(sec.data, offset);
//index
static_assert(sizeof(cryptonote::subaddress_index) == 8);
send_bytes(&index, sizeof(index), offset);
finish_and_exchange(offset);
offset = 0;
receive_secret(sub_sec.data, offset);
#ifdef DEBUG_HWDEVICE
crypto::secret_key sub_sec_clear = hw::ledger::decrypt(sub_sec);
hw::ledger::check32("get_subaddress_secret_key", "sub_sec", sub_sec_x.data, sub_sec_clear.data);
#endif
return sub_sec;
}
/* ======================================================================= */
/* DERIVATION & KEY */
/* ======================================================================= */
bool device_ledger::verify_keys(const crypto::secret_key &secret_key, const crypto::public_key &public_key) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset;
offset = set_command_header_noopt(INS_VERIFY_KEY);
//sec
send_secret(secret_key.data, offset);
//pub
send_bytes(public_key.data, 32, offset);
finish_and_exchange(offset);
offset = 0;
uint32_t verified = receive_u32(offset);
return verified == 1;
}
bool device_ledger::scalarmultKey(rct::key& aP, const rct::key &P, const rct::key &a) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const rct::key a_x = hw::ledger::decrypt(a);
log_hexbuffer("scalarmultKey: [[IN]] P ", P.bytes, 32);
log_hexbuffer("scalarmultKey: [[IN]] a ", a_x.bytes, 32);
rct::key aP_x;
debug_device->scalarmultKey(aP_x, P, a_x);
log_hexbuffer("scalarmultKey: [[OUT]] aP", aP_x.bytes, 32);
#endif
int offset = set_command_header_noopt(INS_SECRET_SCAL_MUL_KEY);
//pub
send_bytes(P.bytes, 32, offset);
//sec
send_secret(a.bytes, offset);
finish_and_exchange(offset);
//pub key
receive_bytes(aP.bytes, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("scalarmultKey", "mulkey", aP_x.bytes, aP.bytes);
#endif
return true;
}
bool device_ledger::scalarmultBase(rct::key &aG, const rct::key &a) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const rct::key a_x = hw::ledger::decrypt(a);
log_hexbuffer("scalarmultKey: [[IN]] a ", a_x.bytes, 32);
rct::key aG_x;
debug_device->scalarmultBase(aG_x, a_x);
log_hexbuffer("scalarmultKey: [[OUT]] aG", aG_x.bytes, 32);
#endif
int offset = set_command_header_noopt(INS_SECRET_SCAL_MUL_BASE);
//sec
send_secret(a.bytes, offset);
finish_and_exchange(offset);
//pub key
receive_bytes(aG.bytes, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("scalarmultBase", "mulkey", aG_x.bytes, aG.bytes);
#endif
return true;
}
bool device_ledger::sc_secret_add( crypto::secret_key &r, const crypto::secret_key &a, const crypto::secret_key &b) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset;
#ifdef DEBUG_HWDEVICE
const crypto::secret_key a_x = hw::ledger::decrypt(a);
const crypto::secret_key b_x = hw::ledger::decrypt(b);
log_hexbuffer("sc_secret_add: [[IN]] a ", a_x.data, 32);
log_hexbuffer("sc_secret_add: [[IN]] b ", b_x.data, 32);
crypto::secret_key r_x;
rct::key aG_x;
debug_device->sc_secret_add(r_x, a_x, b_x);
log_hexbuffer("sc_secret_add: [[OUT]] aG", r_x.data, 32);
#endif
offset = set_command_header_noopt(INS_SECRET_KEY_ADD);
//sec key
send_secret(a.data, offset);
//sec key
send_secret(b.data, offset);
finish_and_exchange(offset);
//sec key
offset = 0;
receive_secret(r.data, offset);
#ifdef DEBUG_HWDEVICE
crypto::secret_key r_clear = hw::ledger::decrypt(r);
hw::ledger::check32("sc_secret_add", "r", r_x.data, r_clear.data);
#endif
return true;
}
crypto::secret_key device_ledger::generate_keys(crypto::public_key &pub, crypto::secret_key &sec, const crypto::secret_key& recovery_key, bool recover) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset;
if (recover) {
throw std::runtime_error("device generate key does not support recover");
}
#ifdef DEBUG_HWDEVICE
crypto::public_key pub_x;
crypto::secret_key sec_x;
crypto::secret_key recovery_key_x;
if (recover) {
recovery_key_x = hw::ledger::decrypt(recovery_key);
log_hexbuffer("generate_keys: [[IN]] pub", recovery_key_x.data, 32);
}
#endif
send_simple(INS_GENERATE_KEYPAIR);
offset = 0;
//pub key
receive_bytes(pub.data, 32, offset);
receive_secret(sec.data, offset);
#ifdef DEBUG_HWDEVICE
crypto::secret_key sec_clear = hw::ledger::decrypt(sec);
sec_x = sec_clear;
log_hexbuffer("generate_keys: [[OUT]] pub", pub.data, 32);
log_hexbuffer("generate_keys: [[OUT]] sec", sec_clear.data, 32);
crypto::secret_key_to_public_key(sec_x,pub_x);
hw::ledger::check32("generate_keys", "pub", pub_x.data, pub.data);
#endif
return sec;
}
bool device_ledger::generate_key_derivation(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_derivation &derivation) {
auto locks = tools::unique_locks(device_locker, command_locker);
bool r = false;
#ifdef DEBUG_HWDEVICE
log_hexbuffer("generate_key_derivation: [[IN]] pub ", pub.data, 32);
const crypto::secret_key sec_x = (sec == rct::rct2sk(rct::I)) ? sec : hw::ledger::decrypt(sec);
log_hexbuffer("generate_key_derivation: [[IN]] sec ", sec_x.data, 32);
crypto::key_derivation derivation_x;
debug_device->generate_key_derivation(pub, sec_x, derivation_x);
log_hexbuffer("generate_key_derivation: [[OUT]] derivation", derivation_x.data, 32);
#endif
if (mode == TRANSACTION_PARSE && has_view_key) {
//A derivation is requested in PARSE mode and we have the view key,
//so do that without the device and return the derivation unencrypted.
MDEBUG( "generate_key_derivation : PARSE mode with known viewkey");
//Note derivation in PARSE mode can only happen with viewkey, so assert it!
assert(is_fake_view_key(sec));
r = crypto::generate_key_derivation(pub, viewkey, derivation);
} else {
int offset = set_command_header_noopt(INS_GEN_KEY_DERIVATION);
//pub
send_bytes(pub.data, 32, offset);
//sec
send_secret(sec.data, offset);
finish_and_exchange(offset);
offset = 0;
//derivation data
receive_secret(derivation.data, offset);
r = true;
}
#ifdef DEBUG_HWDEVICE
crypto::key_derivation derivation_clear =
(mode == TRANSACTION_PARSE && has_view_key) ? derivation : hw::ledger::decrypt(derivation);
hw::ledger::check32("generate_key_derivation", "derivation", derivation_x.data, derivation_clear.data);
#endif
return r;
}
bool device_ledger::conceal_derivation(crypto::key_derivation &derivation, const crypto::public_key &tx_pub_key, const std::vector<crypto::public_key> &additional_tx_pub_keys, const crypto::key_derivation &main_derivation, const std::vector<crypto::key_derivation> &additional_derivations) {
const crypto::public_key *pkey = nullptr;
if (derivation == main_derivation) {
pkey = &tx_pub_key;
MDEBUG("conceal derivation with main tx pub key");
} else {
for (size_t n = 0; n < additional_derivations.size(); ++n) {
if (derivation == additional_derivations[n]) {
pkey = &additional_tx_pub_keys[n];
MDEBUG("conceal derivation with additionnal tx pub key");
break;
}
}
}
CHECK_AND_ASSERT_THROW_MES(pkey, "Mismatched derivation on scan info");
return generate_key_derivation(*pkey, crypto::null_skey, derivation);
}
bool device_ledger::derivation_to_scalar(const crypto::key_derivation &derivation, const size_t output_index, crypto::ec_scalar &res) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::key_derivation derivation_x = hw::ledger::decrypt(derivation);
log_hexbuffer("derivation_to_scalar: [[IN]] derivation ", derivation_x.data, 32);
log_message ("derivation_to_scalar: [[IN]] output_index ", std::to_string(output_index));
crypto::ec_scalar res_x;
debug_device->derivation_to_scalar(derivation_x, output_index, res_x);
log_hexbuffer("derivation_to_scalar: [[OUT]] res ", res_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_DERIVATION_TO_SCALAR);
//derivation
send_secret(derivation.data, offset);
//index
send_u32(output_index, offset);
finish_and_exchange(offset);
//derivation data
offset = 0;
receive_secret(res.data, offset);
#ifdef DEBUG_HWDEVICE
crypto::ec_scalar res_clear = hw::ledger::decrypt(res);
hw::ledger::check32("derivation_to_scalar", "res", res_x.data, res_clear.data);
#endif
return true;
}
bool device_ledger::derive_secret_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::secret_key &sec, crypto::secret_key &derived_sec) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::key_derivation derivation_x = hw::ledger::decrypt(derivation);
const crypto::secret_key sec_x = hw::ledger::decrypt(sec);
log_hexbuffer("derive_secret_key: [[IN]] derivation ", derivation_x.data, 32);
log_message ("derive_secret_key: [[IN]] index ", std::to_string(output_index));
log_hexbuffer("derive_secret_key: [[IN]] sec ", sec_x.data, 32);
crypto::secret_key derived_sec_x;
debug_device->derive_secret_key(derivation_x, output_index, sec_x, derived_sec_x);
log_hexbuffer("derive_secret_key: [[OUT]] derived_sec", derived_sec_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_DERIVE_SECRET_KEY);
//derivation
send_secret(derivation.data, offset);
//index
send_u32(output_index, offset);
//sec
send_secret(sec.data, offset);
finish_and_exchange(offset);
offset = 0;
//sec key
receive_secret(derived_sec.data, offset);
#ifdef DEBUG_HWDEVICE
crypto::secret_key derived_sec_clear = hw::ledger::decrypt(derived_sec);
hw::ledger::check32("derive_secret_key", "derived_sec", derived_sec_x.data, derived_sec_clear.data);
#endif
return true;
}
bool device_ledger::derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &pub, crypto::public_key &derived_pub){
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::key_derivation derivation_x = hw::ledger::decrypt(derivation);
log_hexbuffer("derive_public_key: [[IN]] derivation ", derivation_x.data, 32);
log_message ("derive_public_key: [[IN]] output_index", std::to_string(output_index));
log_hexbuffer("derive_public_key: [[IN]] pub ", pub.data, 32);
crypto::public_key derived_pub_x;
debug_device->derive_public_key(derivation_x, output_index, pub, derived_pub_x);
log_hexbuffer("derive_public_key: [[OUT]] derived_pub ", derived_pub_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_DERIVE_PUBLIC_KEY);
//derivation
send_secret(derivation.data, offset);
//index
send_u32(output_index, offset);
//pub
send_bytes(pub.data, 32, offset);
finish_and_exchange(offset);
//pub key
receive_bytes(derived_pub.data, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("derive_public_key", "derived_pub", derived_pub_x.data, derived_pub.data);
#endif
return true;
}
bool device_ledger::secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::secret_key sec_x = hw::ledger::decrypt(sec);
log_hexbuffer("secret_key_to_public_key: [[IN]] sec ", sec_x.data, 32);
crypto::public_key pub_x;
bool rc = debug_device->secret_key_to_public_key(sec_x, pub_x);
log_hexbuffer("secret_key_to_public_key: [[OUT]] pub", pub_x.data, 32);
if (!rc){
log_message("FAIL secret_key_to_public_key", "secret_key rejected");
}
#endif
int offset = set_command_header_noopt(INS_SECRET_KEY_TO_PUBLIC_KEY);
//sec key
send_secret(sec.data, offset);
finish_and_exchange(offset);
//pub key
receive_bytes(pub.data, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("secret_key_to_public_key", "pub", pub_x.data, pub.data);
#endif
return true;
}
bool device_ledger::generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image){
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::secret_key sec_x = hw::ledger::decrypt(sec);
log_hexbuffer("generate_key_image: [[IN]] pub ", pub.data, 32);
log_hexbuffer("generate_key_image: [[IN]] sec ", sec_x.data, 32);
crypto::key_image image_x;
debug_device->generate_key_image(pub, sec_x, image_x);
log_hexbuffer("generate_key_image: [[OUT]] image ", image_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_GEN_KEY_IMAGE);
//pub
send_bytes(pub.data, 32, offset);
//sec
send_secret(sec.data, offset);
finish_and_exchange(offset);
//key image
receive_bytes(image.data, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("generate_key_image", "image", image_x.data, image.data);
#endif
return true;
}
bool device_ledger::generate_key_image_signature(const crypto::key_image& image, const crypto::public_key& pub, const crypto::secret_key& sec, crypto::signature& sig) {
auto locks = tools::unique_locks(device_locker, command_locker);
int offset = set_command_header_noopt(INS_GEN_KEY_IMAGE_SIGNATURE);
send_bytes(image.data, 32, offset);
send_bytes(pub.data, 32, offset);
send_secret(sec.data, offset);
finish_and_exchange(offset);
receive_bytes(reinterpret_cast<char*>(&sig), 64);
#ifdef DEBUG_HWDEVICE
// We can't check the actual returned signature byte values because a random component is
// involved, but we *can* attempt to verify the signature
bool good = crypto::check_key_image_signature(image, pub, sig);
log_hexbuffer("generate_key_image_signature: key image", image.data, 32);
log_hexbuffer("generate_key_image_signature: pubkey", pub.data, 32);
log_hexbuffer("generate_key_image_signature: signature.c", sig.c.data, 32);
log_hexbuffer("generate_key_image_signature: signature.r", sig.r.data, 32);
log_message("generate_key_image_signature: signature returned from device", good ? "passed" : "FAILED");
#endif
return true;
}
bool device_ledger::generate_unlock_signature(const crypto::public_key& pub, const crypto::secret_key& sec, crypto::signature& sig) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
log_hexbuffer("generate_unlock_signature: [[IN]] pub ", pub.data, 32);
const crypto::secret_key sec_x = hw::ledger::decrypt(sec);
log_hexbuffer("generate_unlock_signature: [[IN]] sec ", sec_x.data, 32);
#endif
// Ask for confirmation:
int offset = set_command_header_noopt(INS_GEN_UNLOCK_SIGNATURE);
CHECK_AND_ASSERT_THROW_MES(finish_and_exchange(offset, true) == SW_OK, "Unlock denied on device.");
// If we got permission then we can ask for the actual signature:
offset = set_command_header_noopt(INS_GEN_UNLOCK_SIGNATURE, 1);
send_bytes(pub.data, 32, offset);
send_secret(sec.data, offset);
finish_and_exchange(offset);
receive_bytes(reinterpret_cast<char*>(&sig), 64);
#ifdef DEBUG_HWDEVICE
// We can't check the actual returned signature byte values because a random component is
// involved, but we *can* attempt to verify the signature
bool good = crypto::check_signature(cryptonote::tx_extra_tx_key_image_unlock::HASH, pub, sig);
log_hexbuffer("generate_unlock_signature: signature.c", sig.c.data, 32);
log_hexbuffer("generate_unlock_signature: signature.r", sig.r.data, 32);
log_message("generate_unlock_signature: signature returned from device", good ? "passed" : "FAILED");
#endif
return true;
}
bool device_ledger::generate_lns_signature(std::string_view sig_data, const cryptonote::account_keys& keys, const cryptonote::subaddress_index& index, crypto::signature& sig) {
// Initialize (prompts the user):
int offset = set_command_header_noopt(INS_GEN_LNS_SIGNATURE);
CHECK_AND_ASSERT_THROW_MES(finish_and_exchange(offset, true) == SW_OK, "LNS denied on device.");
// Send lns signature data to be hashed:
exchange_multipart_data(INS_GEN_LNS_SIGNATURE, 1, sig_data, BLAKE2B_HASH_CHUNK_SIZE);
// Send the subaddr indices and get the signature:
offset = set_command_header_noopt(INS_GEN_LNS_SIGNATURE, 2);
send_bytes(&index, sizeof(index), offset);
finish_and_exchange(offset);
receive_bytes(reinterpret_cast<char*>(&sig), 64);
return true;
}
/* ======================================================================= */
/* TRANSACTION */
/* ======================================================================= */
void device_ledger::generate_tx_proof(const crypto::hash &prefix_hash,
const crypto::public_key &R, const crypto::public_key &A, const std::optional<crypto::public_key> &B, const crypto::public_key &D, const crypto::secret_key &r,
crypto::signature &sig) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::hash prefix_hash_x = prefix_hash;
const crypto::public_key R_x = R;
const crypto::public_key A_x = A;
const std::optional<crypto::public_key> B_x = B;
const crypto::public_key D_x = D;
const crypto::secret_key r_x = hw::ledger::decrypt(r);
crypto::signature sig_x;
log_hexbuffer("generate_tx_proof: [[IN]] prefix_hash ", prefix_hash_x.data, 32);
log_hexbuffer("generate_tx_proof: [[IN]] R ", R_x.data, 32);
log_hexbuffer("generate_tx_proof: [[IN]] A ", A_x.data, 32);
if (B_x)
log_hexbuffer("generate_tx_proof: [[IN]] B ", B_x->data, 32);
log_hexbuffer("generate_tx_proof: [[IN]] D ", D_x.data, 32);
log_hexbuffer("generate_tx_proof: [[IN]] r ", r_x.data, 32);
#endif
int offset = set_command_header(INS_GET_TX_PROOF);
//options
buffer_send[offset++] = B ? 0x01 : 0x00;
send_bytes(prefix_hash.data, 32, offset); // prefix_hash
send_bytes(R.data, 32, offset); // R
send_bytes(A.data, 32, offset); // A
send_bytes(B ? B->data : crypto::null_pkey.data, 32, offset); // B
send_bytes(D.data, 32, offset); // D
send_secret(r.data, offset); // r
finish_and_exchange(offset);
offset = 0;
receive_bytes(sig.c.data, 32, offset);
receive_bytes(sig.r.data, 32, offset);
#ifdef DEBUG_HWDEVICE
log_hexbuffer("GENERATE_TX_PROOF: **c** ", sig.c.data, sizeof(sig.c.data));
log_hexbuffer("GENERATE_TX_PROOF: **r** ", sig.r.data, sizeof(sig.r.data));
debug_device->generate_tx_proof(prefix_hash_x, R_x, A_x, B_x, D_x, r_x, sig_x);
MDEBUG("FAIL is normal if random is not fixed in proof");
hw::ledger::check32("generate_tx_proof", "c", sig_x.c.data, sig.c.data);
hw::ledger::check32("generate_tx_proof", "r", sig_x.r.data, sig.r.data);
#endif
}
bool device_ledger::open_tx(crypto::secret_key &tx_key, cryptonote::txversion txversion, cryptonote::txtype txtype) {
auto locks = tools::unique_locks(device_locker, command_locker, *this);
key_map.clear();
hmac_map.clear();
tx_in_progress = true;
int offset = set_command_header_noopt(INS_OPEN_TX, 0x01);
send_u16(static_cast<uint16_t>(txversion), offset);
send_u16(static_cast<uint16_t>(txtype), offset);
finish_and_exchange(offset);
//skip R, receive: r, r_hmac, fake_a, a_hmac, fake_b, hmac_b
unsigned char tmp[32];
offset = 32;
receive_secret(tx_key.data, offset);
receive_secret(tmp, offset);
receive_secret(tmp, offset);
#ifdef DEBUG_HWDEVICE
const crypto::secret_key r_x = hw::ledger::decrypt(tx_key);
log_hexbuffer("open_tx: [[OUT]] R ", buffer_recv, 32);
log_hexbuffer("open_tx: [[OUT]] r ", r_x.data, 32);
#endif
return true;
}
// Sends data in chunks using the given ins/p1 values, with p2 set to a sequence
// 1->2->....->255->1->...->0 so that the hw device can make sure it didn't miss anything.
// (Note the wrapping goes 255->1, not 255->0, as 0 always indicates the last piece).
// Max chunk size is 254 bytes.
void device_ledger::exchange_multipart_data(uint8_t ins, uint8_t p1, std::string_view data, uint8_t chunk_size) {
assert(chunk_size <= 254);
size_t cnt = 0;
while (!data.empty()) {
auto piece = data.substr(0, chunk_size);
data.remove_prefix(piece.size());
if (data.empty())
cnt = 0; // Signals last piece
else
cnt = cnt == 255 ? 1 : cnt + 1;
int offset = set_command_header_noopt(ins, p1, cnt);
send_bytes(piece.data(), piece.size(), offset);
finish_and_exchange(offset);
}
}
void device_ledger::get_transaction_prefix_hash(const cryptonote::transaction_prefix& tx, crypto::hash& h) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
crypto::hash h_x;
debug_device->get_transaction_prefix_hash(tx, h_x);
MDEBUG("get_transaction_prefix_hash [[IN]] h_x/1 " << h_x);
#endif
// As of protocol version 4, we send:
// - tx version
// - tx type (transfer, registration, stake, lns)
// - tx lock time (if the tx has multiple lock times this will be the largest one)
// We then wait for confirmation from the device, and if we get it we continue by sending the
// data in chunks. The last chunk will have a p2 subparameter of 0;
// otherwise the p2 subparameters are in order starting at 1 (and, if we wrap, we go from 255->1).
std::string tx_prefix;
try {
tx_prefix = serialization::dump_binary(const_cast<cryptonote::transaction_prefix&>(tx));
} catch (const std::exception& e) {
ASSERT_MES_AND_THROW("unable to serialize transaction prefix: " << e.what());
}
unsigned char* send = buffer_send + set_command_header_noopt(INS_PREFIX_HASH, 1);
// version as varint
tools::write_varint(send, static_cast<std::underlying_type_t<cryptonote::txversion>>(tx.version));
// transaction type as varint
tools::write_varint(send, static_cast<std::underlying_type_t<cryptonote::txtype>>(tx.type));
// Transactions can have multiple unlock times; find the longest one and send that
uint64_t max_unlock = 0;
for (size_t i = 0; i < tx.vout.size(); i++)
max_unlock = std::max(max_unlock, tx.get_unlock_time(i));
tools::write_varint(send, max_unlock);
length_send = send - buffer_send;
buffer_send[4] = length_send - 5;
exchange(true);
// hash the full prefix
exchange_multipart_data(INS_PREFIX_HASH, 2, tx_prefix, KECCAK_HASH_CHUNK_SIZE);
receive_bytes(h.data, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check8("prefix_hash", "h", h_x.data, h.data);
#endif
}
bool device_ledger::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const crypto::secret_key secret_key_x = hw::ledger::decrypt(secret_key);
log_hexbuffer("encrypt_payment_id: [[IN]] payment_id ", payment_id.data, 32);
log_hexbuffer("encrypt_payment_id: [[IN]] public_key ", public_key.data, 32);
log_hexbuffer("encrypt_payment_id: [[IN]] secret_key ", secret_key_x.data, 32);
crypto::hash8 payment_id_x = payment_id;
debug_device->encrypt_payment_id(payment_id_x, public_key, secret_key_x);
log_hexbuffer("encrypt_payment_id: [[OUT]] payment_id ", payment_id_x.data, 32);
#endif
int offset = set_command_header_noopt(INS_ENCRYPT_PAYMENT_ID);
send_bytes(public_key.data, 32, offset); // pub
send_secret(secret_key.data, offset); //sec
send_bytes(payment_id.data, 8, offset); //id
finish_and_exchange(offset);
receive_bytes(payment_id.data, 8);
#ifdef DEBUG_HWDEVICE
hw::ledger::check8("stealth", "payment_id", payment_id_x.data, payment_id.data);
#endif
return true;
}
bool device_ledger::generate_output_ephemeral_keys(
const size_t tx_version,
bool& found_change,
const cryptonote::account_keys& sender_account_keys,
const crypto::public_key& txkey_pub,
const crypto::secret_key& tx_key,
const cryptonote::tx_destination_entry& dst_entr,
const std::optional<cryptonote::tx_destination_entry>& change_addr,
const size_t output_index,
const bool need_additional_txkeys,
const std::vector<crypto::secret_key>& additional_tx_keys,
std::vector<crypto::public_key>& additional_tx_public_keys,
std::vector<rct::key>& amount_keys,
crypto::public_key& out_eph_public_key) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
cryptonote::account_keys sender_account_keys_x = hw::ledger::decrypt(sender_account_keys);
std::memmove(sender_account_keys_x.m_view_secret_key.data, dbg_viewkey.data, 32);
const crypto::secret_key tx_key_x = hw::ledger::decrypt(tx_key);
std::vector<crypto::secret_key> additional_tx_keys_x;
for (const auto& k: additional_tx_keys) {
additional_tx_keys_x.push_back(hw::ledger::decrypt(k));
}
log_message("generate_output_ephemeral_keys: [[IN]] tx_version", std::to_string(tx_version));
//log_hexbuffer("generate_output_ephemeral_keys: [[IN]] sender_account_keys.view", sender_account_keys.m_sview_secret_key.data, 32);
//log_hexbuffer("generate_output_ephemeral_keys: [[IN]] sender_account_keys.spend", sender_account_keys.m_spend_secret_key.data, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] txkey_pub", txkey_pub.data, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] tx_key", tx_key_x.data, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] dst_entr.view", dst_entr.addr.m_view_public_key.data, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] dst_entr.spend", dst_entr.addr.m_spend_public_key.data, 32);
if (change_addr) {
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] change_addr.view", change_addr->addr.m_view_public_key.data, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] change_addr.spend", change_addr->addr.m_spend_public_key.data, 32);
}
log_message("generate_output_ephemeral_keys: [[IN]] output_index", std::to_string(output_index));
log_message("generate_output_ephemeral_keys: [[IN]] need_additional_txkeys", std::to_string(need_additional_txkeys));
if (need_additional_txkeys) {
log_hexbuffer("generate_output_ephemeral_keys: [[IN]] additional_tx_keys[oi]", additional_tx_keys_x[output_index].data, 32);
}
std::vector<crypto::public_key> additional_tx_public_keys_x;
std::vector<rct::key> amount_keys_x;
crypto::public_key out_eph_public_key_x;
debug_device->generate_output_ephemeral_keys(tx_version, found_change, sender_account_keys_x, txkey_pub, tx_key_x, dst_entr, change_addr, output_index, need_additional_txkeys, additional_tx_keys_x,
additional_tx_public_keys_x, amount_keys_x, out_eph_public_key_x);
if(need_additional_txkeys) {
log_hexbuffer("additional_tx_public_keys_x: [[OUT]] additional_tx_public_keys_x", additional_tx_public_keys_x.back().data, 32);
}
log_hexbuffer("generate_output_ephemeral_keys: [[OUT]] amount_keys ", amount_keys_x.back().bytes, 32);
log_hexbuffer("generate_output_ephemeral_keys: [[OUT]] out_eph_public_key ", out_eph_public_key_x.data, 32);
#endif
CHECK_AND_ASSERT_THROW_MES(tx_version > 1, "TX version not supported"<<tx_version);
// make additional tx pubkey if necessary
cryptonote::keypair additional_txkey;
if (need_additional_txkeys) {
additional_txkey.sec = additional_tx_keys[output_index];
}
bool &is_change = found_change; // NOTE(loki): Alias our param into theirs so we don't have to change much code.
if (change_addr && dst_entr == *change_addr && !is_change)
is_change = true; // sending change to yourself; derivation = a*R
int offset = set_command_header_noopt(INS_GEN_TXOUT_KEYS);
send_u32(tx_version, offset); //tx_version
send_secret(tx_key.data, offset); //tx_key
send_bytes(txkey_pub.data, 32, offset); //txkey_pub
send_bytes(dst_entr.addr.m_view_public_key.data, 32, offset); //Aout
send_bytes(dst_entr.addr.m_spend_public_key.data, 32, offset); //Bout
send_u32(output_index, offset); //output index
buffer_send[offset++] = is_change; //is_change
buffer_send[offset++] = dst_entr.is_subaddress; //is_subaddress
buffer_send[offset++] = need_additional_txkeys; //need_additional_key
//additional_tx_key
if (need_additional_txkeys)
send_secret(additional_txkey.sec.data, offset);
finish_and_exchange(offset);
offset = 0;
unsigned int recv_len = length_recv;
//if (tx_version > 1)
{
CHECK_AND_ASSERT_THROW_MES(recv_len>=32, "Not enough data from device");
crypto::secret_key scalar1;
receive_secret(scalar1.data, offset);
amount_keys.push_back(rct::sk2rct(scalar1));
recv_len -= 32;
}
CHECK_AND_ASSERT_THROW_MES(recv_len>=32, "Not enough data from device");
receive_bytes(out_eph_public_key.data, 32, offset);
recv_len -= 32;
if (need_additional_txkeys)
{
CHECK_AND_ASSERT_THROW_MES(recv_len>=32, "Not enough data from device");
receive_bytes(additional_txkey.pub.data, 32, offset);
additional_tx_public_keys.push_back(additional_txkey.pub);
recv_len -= 32;
}
// add ABPkeys
add_output_key_mapping(dst_entr.addr.m_view_public_key, dst_entr.addr.m_spend_public_key, dst_entr.is_subaddress, is_change,
need_additional_txkeys, output_index,
amount_keys.back(), out_eph_public_key);
#ifdef DEBUG_HWDEVICE
rct::key amount_back = hw::ledger::decrypt(amount_keys.back());
log_hexbuffer("generate_output_ephemeral_keys: clear amount_key", amount_back.bytes, 32);
hw::ledger::check32("generate_output_ephemeral_keys", "amount_key", amount_keys_x.back().bytes, amount_back.bytes);
if (need_additional_txkeys) {
hw::ledger::check32("generate_output_ephemeral_keys", "additional_tx_key", additional_tx_public_keys_x.back().data, additional_tx_public_keys.back().data);
}
hw::ledger::check32("generate_output_ephemeral_keys", "out_eph_public_key", out_eph_public_key_x.data, out_eph_public_key.data);
#endif
return true;
}
bool device_ledger::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const bool is_change,
const bool need_additional, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) {
key_map.add(ABPkeys(rct::pk2rct(Aout),rct::pk2rct(Bout), is_subaddress, is_change, need_additional, real_output_index, rct::pk2rct(out_eph_public_key), amount_key));
return true;
}
rct::key device_ledger::genCommitmentMask(const rct::key &AKout) {
#ifdef DEBUG_HWDEVICE
rct::key mask_x = debug_device->genCommitmentMask(hw::ledger::decrypt(AKout));
#endif
rct::key mask;
int offset = set_command_header_noopt(INS_GEN_COMMITMENT_MASK);
// AKout
send_secret(AKout.bytes, offset);
finish_and_exchange(offset);
receive_bytes(mask.bytes, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("genCommitmentMask", "mask", mask_x.bytes, mask.bytes);
#endif
return mask;
}
bool device_ledger::ecdhEncode(rct::ecdhTuple& unmasked, const rct::key& AKout, bool short_amount) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const rct::key AKout_x = hw::ledger::decrypt(AKout);
rct::ecdhTuple unmasked_x = unmasked;
debug_device->ecdhEncode(unmasked_x, AKout_x, short_amount);
#endif
int offset = set_command_header(INS_BLIND);
buffer_send[offset++] = short_amount ? 0x02 : 0x00; //options
send_secret(AKout.bytes, offset); // AKout
send_bytes(unmasked.mask.bytes, 32, offset); //mask k
send_bytes(unmasked.amount.bytes, 32, offset); //value v
finish_and_exchange(offset);
offset = 0;
receive_bytes(unmasked.amount.bytes, 32, offset);
receive_bytes(unmasked.mask.bytes, 32, offset);
#ifdef DEBUG_HWDEVICE
MDEBUG("ecdhEncode: Akout: "<<AKout_x);
hw::ledger::check32("ecdhEncode", "amount", unmasked_x.amount.bytes, unmasked.amount.bytes);
hw::ledger::check32("ecdhEncode", "mask", unmasked_x.mask.bytes, unmasked.mask.bytes);
log_hexbuffer("Blind AKV input", &buffer_recv[64], 3*32);
#endif
return true;
}
bool device_ledger::ecdhDecode(rct::ecdhTuple& masked, const rct::key& AKout, bool short_amount) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const rct::key AKout_x = hw::ledger::decrypt(AKout);
rct::ecdhTuple masked_x = masked;
debug_device->ecdhDecode(masked_x, AKout_x, short_amount);
#endif
int offset = set_command_header(INS_UNBLIND);
buffer_send[offset++] = short_amount ? 0x02 : 0x00; //options
send_secret(AKout.bytes, offset); // AKout
send_bytes(masked.mask.bytes, 32, offset); //mask k
send_bytes(masked.amount.bytes, 32, offset); //value v
finish_and_exchange(offset);
offset = 0;
receive_bytes(masked.amount.bytes, 32, offset);
receive_bytes(masked.mask.bytes, 32, offset);
#ifdef DEBUG_HWDEVICE
MDEBUG("ecdhEncode: Akout: "<<AKout_x);
hw::ledger::check32("ecdhDecode", "amount", masked_x.amount.bytes, masked.amount.bytes);
hw::ledger::check32("ecdhDecode", "mask", masked_x.mask.bytes, masked.mask.bytes);
#endif
return true;
}
bool device_ledger::clsag_prehash(const std::string &data, size_t inputs_size, size_t outputs_size,
const rct::keyV &hashes, const rct::ctkeyV &outPk,
rct::key &prehash) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
rct::key prehash_x;
debug_device->clsag_prehash(data, inputs_size, outputs_size, hashes, outPk, prehash_x);
if (inputs_size) {
log_message("clsag_prehash", (std::string("inputs_size not null: ") + std::to_string(inputs_size)).c_str());
}
key_map.log();
#endif
// ====== u8 type, varint txnfee ======
int offset = set_command_header(INS_VALIDATE, 0x01, 0x01);
//options
buffer_send[offset++] = (inputs_size == 0) ? 0x00 : OPTION_MORE_DATA;
buffer_send[offset++] = data[0];
// txnfee
size_t data_offset = 1;
while (data[data_offset] & 0x80)
buffer_send[offset++] = data[data_offset++];
buffer_send[offset++] = data[data_offset++];
// check fee user input
CHECK_AND_ASSERT_THROW_MES(finish_and_exchange(offset, true) == SW_OK, "Fee denied on device.");
auto type = static_cast<rct::RCTType>(data[0]);
CHECK_AND_ASSERT_THROW_MES(type == rct::RCTType::CLSAG, "non-CLSAG generation not supported");
// ====== Aout, Bout, AKout, C, v, k ======
size_t kv_offset = data_offset;
size_t C_offset = kv_offset + 8 * outputs_size;
for (size_t i = 0; i < outputs_size; i++) {
ABPkeys outKeys;
bool found;
found = key_map.find(outPk[i].dest, outKeys);
if (!found) {
log_hexbuffer("Pout not found", outPk[i].dest.bytes, 32);
CHECK_AND_ASSERT_THROW_MES(found, "Pout not found");
}
offset = set_command_header(INS_VALIDATE, 0x02, i+1);
// options
buffer_send[offset++] = (i < outputs_size-1 ? OPTION_MORE_DATA : 0) | 0x02;
buffer_send[offset++] = outKeys.is_subaddress; //is_subaddress
buffer_send[offset++] = outKeys.is_change_address; //is_change_address
send_bytes(outKeys.Aout.bytes, 32, offset); //Aout
send_bytes(outKeys.Bout.bytes, 32, offset); //Bout
send_secret(outKeys.AKout.bytes, offset); //AKout
send_bytes(&data[C_offset], 32, offset); //C
C_offset += 32;
send_bytes(crypto::null_hash.data, 32, offset); // k
send_bytes(&data[kv_offset], 8, offset); // v
kv_offset += 8;
send_bytes(crypto::null_hash.data, 24, offset); // v padding
// check transaction user input
CHECK_AND_ASSERT_THROW_MES(finish_and_exchange(offset, true) == SW_OK, "Transaction denied on device.");
#ifdef DEBUG_HWDEVICE
log_hexbuffer("Prehash AKV input", &buffer_recv[64], 3*32);
#endif
}
// ====== C[], message, proof======
C_offset = kv_offset;
for (size_t i = 0; i < outputs_size; i++) {
offset = set_command_header(INS_VALIDATE, 0x03, i+1);
buffer_send[offset++] = 0x80; //options
send_bytes(&data[C_offset], 32, offset); //C
C_offset += 32;
finish_and_exchange(offset);
}
offset = set_command_header_noopt(INS_VALIDATE, 0x03, outputs_size+1);
send_bytes(hashes[0].bytes, 32, offset); //message
send_bytes(hashes[2].bytes, 32, offset); //proof
finish_and_exchange(offset);
receive_bytes(prehash.bytes, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("clsag_prehash", "prehash", prehash_x.bytes, prehash.bytes);
#endif
return true;
}
bool device_ledger::clsag_prepare(const rct::key &p, const rct::key &z, rct::key &I, rct::key &D, const rct::key &H, rct::key &a, rct::key &aG, rct::key &aH) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
const rct::key p_x = hw::ledger::decrypt(p);
rct::key I_x;
rct::key D_x;
rct::key a_x;
rct::key aG_x;
rct::key aH_x;
hw::get_device("default").clsag_prepare(p_x, z, I_x, D_x, H, a_x, aG_x, aH_x);
#endif
/*
rct::skpkGen(a,aG); // aG = a*G
rct::scalarmultKey(aH,H,a); // aH = a*H
rct::scalarmultKey(I,H,p); // I = p*H
rct::scalarmultKey(D,H,z); // D = z*H
*/
int offset = set_command_header_noopt(INS_CLSAG, 1);
send_secret(p.bytes, offset); //p
send_bytes(z.bytes, 32, offset); //z
send_bytes(H.bytes, 32, offset); //H
finish_and_exchange(offset);
offset = 0;
receive_secret(a.bytes, offset); //a
receive_bytes(aG.bytes, 32, offset); //aG
receive_bytes(aH.bytes, 32, offset); //aH
receive_bytes(I.bytes, 32, offset); //I = pH
receive_bytes(D.bytes, 32, offset); //D = zH
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("clsag_prepare", "I", I_x.bytes, I.bytes);
hw::ledger::check32("clsag_prepare", "D", D_x.bytes, D.bytes);
hw::ledger::check32("clsag_prepare", "a", a_x.bytes, a.bytes);
hw::ledger::check32("clsag_prepare", "aG", aG_x.bytes, aG.bytes);
hw::ledger::check32("clsag_prepare", "aH", aH_x.bytes, aH.bytes);
#endif
return true;
}
bool device_ledger::clsag_hash(const rct::keyV &keydata, rct::key &hash) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
rct::key hash_x;
debug_device->clsag_hash(keydata, hash_x);
#endif
std::string_view data{reinterpret_cast<const char*>(keydata.data()), sizeof(rct::key)*keydata.size()};
exchange_multipart_data(INS_CLSAG, 2, data, KECCAK_HASH_CHUNK_SIZE);
//c/hash
receive_bytes(hash.bytes, 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("clsag_hash", "hash", hash_x.bytes, hash.bytes);
#endif
return true;
}
bool device_ledger::clsag_sign(const rct::key &c, const rct::key &a, const rct::key &p, const rct::key &z, const rct::key &mu_P, const rct::key &mu_C, rct::key &s) {
auto locks = tools::unique_locks(device_locker, command_locker);
#ifdef DEBUG_HWDEVICE
rct::key s_x;
debug_device->clsag_sign(c, hw::ledger::decrypt(a), hw::ledger::decrypt(p), z, mu_P, mu_C, s_x);
#endif
/*
rct::key s0_p_mu_P;
sc_mul(s0_p_mu_P.bytes,mu_P.bytes,p.bytes);
rct::key s0_add_z_mu_C;
sc_muladd(s0_add_z_mu_C.bytes,mu_C.bytes,z.bytes,s0_p_mu_P.bytes);
sc_mulsub(s.bytes,c.bytes,s0_add_z_mu_C.bytes,a.bytes);
*/
int offset = set_command_header_noopt(INS_CLSAG, 3);
send_secret(a.bytes, offset); //a
send_secret(p.bytes, offset); //p
send_bytes(z.bytes, 32, offset); //z
send_bytes(mu_P.bytes, 32, offset); //mu_P
send_bytes(mu_C.bytes, 32, offset); //mu_C
finish_and_exchange(offset);
receive_bytes(s.bytes, 32); //s
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("clsag_sign", "s", s_x.bytes, s.bytes);
#endif
return true;
}
bool device_ledger::update_staking_tx_secret_key(crypto::secret_key& key) {
auto locks = tools::unique_locks(device_locker, command_locker);
// This will fail if this isn't an open stake tx.
send_simple(INS_GET_TX_SECRET_KEY);
// The ledger provides us with the (unencrypted) tx secret key if we're allowed to have it
receive_bytes(key.data, 32);
return true;
}
bool device_ledger::close_tx() {
auto locks = tools::unique_locks(device_locker, command_locker);
send_simple(INS_CLOSE_TX);
key_map.clear();
hmac_map.clear();
tx_in_progress = false;
unlock();
return true;
}
/* ---------------------------------------------------------- */
static device_ledger *legder_device = NULL;
void register_all(std::map<std::string, std::unique_ptr<device>> &registry) {
if (!legder_device) {
legder_device = new device_ledger();
legder_device->set_name("Ledger");
}
registry.insert(std::make_pair("Ledger", std::unique_ptr<device>(legder_device)));
}
#else //WITH_DEVICE_LEDGER
void register_all(std::map<std::string, std::unique_ptr<device>> &registry) {
}
#endif //WITH_DEVICE_LEDGER
}
}
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