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ea87b30f89
Implements view tags as proposed by @UkoeHB in MRL issue https://github.com/monero-project/research-lab/issues/73 At tx construction, the sender adds a 1-byte view tag to each output. The view tag is derived from the sender-receiver shared secret. When scanning for outputs, the receiver can check the view tag for a match, in order to reduce scanning time. When the view tag does not match, the wallet avoids the more expensive EC operations when deriving the output public key using the shared secret.
77 lines
3.1 KiB
C++
77 lines
3.1 KiB
C++
// Copyright (c) 2014-2022, 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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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#pragma once
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#include "cryptonote_basic/account.h"
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#include "cryptonote_basic/cryptonote_basic.h"
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#include "cryptonote_core/cryptonote_tx_utils.h"
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#include "single_tx_test_base.h"
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class test_is_out_to_acc : public single_tx_test_base
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{
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public:
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static const size_t loop_count = 1000;
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bool test()
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{
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crypto::public_key output_public_key;
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cryptonote::get_output_public_key(m_tx.vout[0], output_public_key);
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return cryptonote::is_out_to_acc(m_bob.get_keys(), output_public_key, m_tx_pub_key, m_additional_tx_pub_keys, 0);
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}
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};
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class test_is_out_to_acc_precomp : public single_tx_test_base
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{
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public:
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static const size_t loop_count = 1000;
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bool init()
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{
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if (!single_tx_test_base::init())
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return false;
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crypto::generate_key_derivation(m_tx_pub_key, m_bob.get_keys().m_view_secret_key, m_derivation);
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return true;
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}
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bool test()
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{
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const cryptonote::txout_to_key& tx_out = boost::get<cryptonote::txout_to_key>(m_tx.vout[0].target);
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std::unordered_map<crypto::public_key, cryptonote::subaddress_index> subaddresses;
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subaddresses[m_bob.get_keys().m_account_address.m_spend_public_key] = {0,0};
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std::vector<crypto::key_derivation> additional_derivations;
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boost::optional<cryptonote::subaddress_receive_info> info = cryptonote::is_out_to_acc_precomp(subaddresses, tx_out.key, m_derivation, additional_derivations, 0, hw::get_device("default"));
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return (bool)info;
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}
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private:
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crypto::key_derivation m_derivation;
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};
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