368 lines
16 KiB
C++
368 lines
16 KiB
C++
// Copyright (c) 2017-2018, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#include "device_default.hpp"
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#include "int-util.h"
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#include "cryptonote_basic/account.h"
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#include "cryptonote_basic/subaddress_index.h"
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#include "ringct/rctOps.h"
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#define ENCRYPTED_PAYMENT_ID_TAIL 0x8d
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#define CHACHA8_KEY_TAIL 0x8c
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namespace hw {
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namespace core {
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device_default::device_default() { }
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device_default::~device_default() { }
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/* ===================================================================== */
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/* === Misc ==== */
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/* ===================================================================== */
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static inline unsigned char *operator &(crypto::ec_scalar &scalar) {
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return &reinterpret_cast<unsigned char &>(scalar);
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}
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static inline const unsigned char *operator &(const crypto::ec_scalar &scalar) {
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return &reinterpret_cast<const unsigned char &>(scalar);
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}
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/* ======================================================================= */
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/* SETUP/TEARDOWN */
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/* ======================================================================= */
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bool device_default::set_name(const std::string &name) {
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this->name = name;
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return true;
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}
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const std::string device_default::get_name() const {
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return this->name;
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}
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bool device_default::init(void) {
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return true;
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}
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bool device_default::release() {
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return true;
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}
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bool device_default::connect(void) {
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return true;
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}
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bool device_default::disconnect() {
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return true;
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}
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bool device_default::set_mode(device_mode mode) {
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return device::set_mode(mode);
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}
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/* ======================================================================= */
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/* LOCKER */
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/* ======================================================================= */
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void device_default::lock() { }
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bool device_default::try_lock() { return true; }
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void device_default::unlock() { }
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/* ======================================================================= */
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/* WALLET & ADDRESS */
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/* ======================================================================= */
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bool device_default::generate_chacha_key(const cryptonote::account_keys &keys, crypto::chacha_key &key, uint64_t kdf_rounds) {
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const crypto::secret_key &view_key = keys.m_view_secret_key;
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const crypto::secret_key &spend_key = keys.m_spend_secret_key;
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epee::mlocked<tools::scrubbed_arr<char, sizeof(view_key) + sizeof(spend_key) + 1>> data;
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memcpy(data.data(), &view_key, sizeof(view_key));
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memcpy(data.data() + sizeof(view_key), &spend_key, sizeof(spend_key));
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data[sizeof(data) - 1] = CHACHA8_KEY_TAIL;
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crypto::generate_chacha_key(data.data(), sizeof(data), key, kdf_rounds);
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return true;
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}
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bool device_default::get_public_address(cryptonote::account_public_address &pubkey) {
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dfns();
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}
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bool device_default::get_secret_keys(crypto::secret_key &viewkey , crypto::secret_key &spendkey) {
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dfns();
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}
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/* ======================================================================= */
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/* SUB ADDRESS */
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/* ======================================================================= */
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bool device_default::derive_subaddress_public_key(const crypto::public_key &out_key, const crypto::key_derivation &derivation, const std::size_t output_index, crypto::public_key &derived_key) {
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return crypto::derive_subaddress_public_key(out_key, derivation, output_index,derived_key);
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}
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crypto::public_key device_default::get_subaddress_spend_public_key(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) {
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if (index.is_zero())
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return keys.m_account_address.m_spend_public_key;
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// m = Hs(a || index_major || index_minor)
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crypto::secret_key m = get_subaddress_secret_key(keys.m_view_secret_key, index);
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// M = m*G
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crypto::public_key M;
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crypto::secret_key_to_public_key(m, M);
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// D = B + M
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crypto::public_key D = rct::rct2pk(rct::addKeys(rct::pk2rct(keys.m_account_address.m_spend_public_key), rct::pk2rct(M)));
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return D;
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}
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std::vector<crypto::public_key> device_default::get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) {
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CHECK_AND_ASSERT_THROW_MES(begin <= end, "begin > end");
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std::vector<crypto::public_key> pkeys;
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pkeys.reserve(end - begin);
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cryptonote::subaddress_index index = {account, begin};
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ge_p3 p3;
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ge_cached cached;
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CHECK_AND_ASSERT_THROW_MES(ge_frombytes_vartime(&p3, (const unsigned char*)keys.m_account_address.m_spend_public_key.data) == 0,
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"ge_frombytes_vartime failed to convert spend public key");
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ge_p3_to_cached(&cached, &p3);
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for (uint32_t idx = begin; idx < end; ++idx)
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{
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index.minor = idx;
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if (index.is_zero())
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{
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pkeys.push_back(keys.m_account_address.m_spend_public_key);
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continue;
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}
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crypto::secret_key m = get_subaddress_secret_key(keys.m_view_secret_key, index);
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// M = m*G
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ge_scalarmult_base(&p3, (const unsigned char*)m.data);
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// D = B + M
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crypto::public_key D;
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ge_p1p1 p1p1;
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ge_add(&p1p1, &p3, &cached);
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ge_p1p1_to_p3(&p3, &p1p1);
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ge_p3_tobytes((unsigned char*)D.data, &p3);
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pkeys.push_back(D);
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}
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return pkeys;
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}
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cryptonote::account_public_address device_default::get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) {
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if (index.is_zero())
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return keys.m_account_address;
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crypto::public_key D = get_subaddress_spend_public_key(keys, index);
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// C = a*D
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crypto::public_key C = rct::rct2pk(rct::scalarmultKey(rct::pk2rct(D), rct::sk2rct(keys.m_view_secret_key)));
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// result: (C, D)
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cryptonote::account_public_address address;
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address.m_view_public_key = C;
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address.m_spend_public_key = D;
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return address;
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}
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crypto::secret_key device_default::get_subaddress_secret_key(const crypto::secret_key &a, const cryptonote::subaddress_index &index) {
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const char prefix[] = "SubAddr";
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char data[sizeof(prefix) + sizeof(crypto::secret_key) + 2 * sizeof(uint32_t)];
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memcpy(data, prefix, sizeof(prefix));
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memcpy(data + sizeof(prefix), &a, sizeof(crypto::secret_key));
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uint32_t idx = SWAP32LE(index.major);
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memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key), &idx, sizeof(uint32_t));
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idx = SWAP32LE(index.minor);
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memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key) + sizeof(uint32_t), &idx, sizeof(uint32_t));
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crypto::secret_key m;
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crypto::hash_to_scalar(data, sizeof(data), m);
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return m;
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}
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/* ======================================================================= */
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/* DERIVATION & KEY */
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/* ======================================================================= */
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bool device_default::verify_keys(const crypto::secret_key &secret_key, const crypto::public_key &public_key) {
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crypto::public_key calculated_pub;
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bool r = crypto::secret_key_to_public_key(secret_key, calculated_pub);
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return r && public_key == calculated_pub;
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}
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bool device_default::scalarmultKey(rct::key & aP, const rct::key &P, const rct::key &a) {
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rct::scalarmultKey(aP, P,a);
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return true;
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}
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bool device_default::scalarmultBase(rct::key &aG, const rct::key &a) {
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rct::scalarmultBase(aG,a);
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return true;
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}
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bool device_default::sc_secret_add(crypto::secret_key &r, const crypto::secret_key &a, const crypto::secret_key &b) {
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sc_add(&r, &a, &b);
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return true;
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}
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crypto::secret_key device_default::generate_keys(crypto::public_key &pub, crypto::secret_key &sec, const crypto::secret_key& recovery_key, bool recover) {
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return crypto::generate_keys(pub, sec, recovery_key, recover);
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}
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bool device_default::generate_key_derivation(const crypto::public_key &key1, const crypto::secret_key &key2, crypto::key_derivation &derivation) {
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return crypto::generate_key_derivation(key1, key2, derivation);
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}
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bool device_default::derivation_to_scalar(const crypto::key_derivation &derivation, const size_t output_index, crypto::ec_scalar &res){
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crypto::derivation_to_scalar(derivation,output_index, res);
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return true;
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}
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bool device_default::derive_secret_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::secret_key &base, crypto::secret_key &derived_key){
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crypto::derive_secret_key(derivation, output_index, base, derived_key);
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return true;
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}
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bool device_default::derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &base, crypto::public_key &derived_key){
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return crypto::derive_public_key(derivation, output_index, base, derived_key);
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}
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bool device_default::secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) {
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return crypto::secret_key_to_public_key(sec,pub);
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}
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bool device_default::generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image){
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crypto::generate_key_image(pub, sec,image);
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return true;
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}
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bool device_default::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){
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return true;
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}
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/* ======================================================================= */
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/* TRANSACTION */
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/* ======================================================================= */
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bool device_default::open_tx(crypto::secret_key &tx_key) {
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cryptonote::keypair txkey = cryptonote::keypair::generate(*this);
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tx_key = txkey.sec;
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return true;
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}
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bool device_default::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
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const rct::key &amount_key, const crypto::public_key &out_eph_public_key) {
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return true;
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}
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bool device_default::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) {
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crypto::key_derivation derivation;
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crypto::hash hash;
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char data[33]; /* A hash, and an extra byte */
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if (!generate_key_derivation(public_key, secret_key, derivation))
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return false;
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memcpy(data, &derivation, 32);
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data[32] = ENCRYPTED_PAYMENT_ID_TAIL;
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cn_fast_hash(data, 33, hash);
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for (size_t b = 0; b < 8; ++b)
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payment_id.data[b] ^= hash.data[b];
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return true;
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}
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bool device_default::ecdhEncode(rct::ecdhTuple & unmasked, const rct::key & sharedSec, bool short_amount) {
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rct::ecdhEncode(unmasked, sharedSec, short_amount);
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return true;
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}
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bool device_default::ecdhDecode(rct::ecdhTuple & masked, const rct::key & sharedSec, bool short_amount) {
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rct::ecdhDecode(masked, sharedSec, short_amount);
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return true;
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}
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bool device_default::mlsag_prepare(const rct::key &H, const rct::key &xx,
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rct::key &a, rct::key &aG, rct::key &aHP, rct::key &II) {
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rct::skpkGen(a, aG);
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rct::scalarmultKey(aHP, H, a);
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rct::scalarmultKey(II, H, xx);
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return true;
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}
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bool device_default::mlsag_prepare(rct::key &a, rct::key &aG) {
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rct::skpkGen(a, aG);
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return true;
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}
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bool device_default::mlsag_prehash(const std::string &blob, size_t inputs_size, size_t outputs_size, const rct::keyV &hashes, const rct::ctkeyV &outPk, rct::key &prehash) {
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prehash = rct::cn_fast_hash(hashes);
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return true;
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}
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bool device_default::mlsag_hash(const rct::keyV &toHash, rct::key &c_old) {
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c_old = rct::hash_to_scalar(toHash);
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return true;
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}
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bool device_default::mlsag_sign(const rct::key &c, const rct::keyV &xx, const rct::keyV &alpha, const size_t rows, const size_t dsRows, rct::keyV &ss ) {
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CHECK_AND_ASSERT_THROW_MES(dsRows<=rows, "dsRows greater than rows");
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CHECK_AND_ASSERT_THROW_MES(xx.size() == rows, "xx size does not match rows");
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CHECK_AND_ASSERT_THROW_MES(alpha.size() == rows, "alpha size does not match rows");
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CHECK_AND_ASSERT_THROW_MES(ss.size() == rows, "ss size does not match rows");
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for (size_t j = 0; j < rows; j++) {
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sc_mulsub(ss[j].bytes, c.bytes, xx[j].bytes, alpha[j].bytes);
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}
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return true;
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}
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bool device_default::close_tx() {
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return true;
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}
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/* ---------------------------------------------------------- */
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static device_default *default_core_device = NULL;
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void register_all(std::map<std::string, std::unique_ptr<device>> ®istry) {
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if (!default_core_device) {
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default_core_device = new device_default();
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default_core_device->set_name("default_core_device");
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}
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registry.insert(std::make_pair("default", std::unique_ptr<device>(default_core_device)));
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}
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}
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}
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