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Correct key image check in tx_pool

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This commit is contained in:
Lee Clagett 2020-03-25 03:02:28 -04:00
parent d1cf16364f
commit 5de2295f3c
4 changed files with 71 additions and 16 deletions
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23
src/cryptonote_core/tx_pool.cpp
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@ -422,27 +422,18 @@ namespace cryptonote
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, txin, false);
std::unordered_set<crypto::hash>& kei_image_set = m_spent_key_images[txin.k_image];
/* If any existing key-image in the set is publicly visible AND this is
not forcibly "kept_by_block", then fail (duplicate key image). If all
existing key images are supposed to be hidden, we silently allow so
that the node doesn't leak knowledge of a local/stem tx. */
bool visible = false;
// Only allow multiple txes per key-image if kept-by-block. Only allow
// the same txid if going from local/stem->fluff.
if (tx_relay != relay_method::block)
{
for (const crypto::hash& other_id : kei_image_set)
visible |= m_blockchain.txpool_tx_matches_category(other_id, relay_category::legacy);
}
CHECK_AND_ASSERT_MES(!visible, false, "internal error: tx_relay=" << unsigned(tx_relay)
const bool one_txid =
(kei_image_set.empty() || (kei_image_set.size() == 1 && *(kei_image_set.cbegin()) == id));
CHECK_AND_ASSERT_MES(one_txid, false, "internal error: tx_relay=" << unsigned(tx_relay)
<< ", kei_image_set.size()=" << kei_image_set.size() << ENDL << "txin.k_image=" << txin.k_image << ENDL
<< "tx_id=" << id);
}
/* If adding a tx (hash) that already exists, fail only if the tx has
been publicly "broadcast" previously. This way, when a private tx is
received for the first time from a remote node, "this" node will
respond as-if it were seen for the first time. LMDB does the
"hard-check" on key-images, so the effect is overwriting the existing
tx_pool metadata and "first seen" time. */
const bool new_or_previously_private =
kei_image_set.insert(id).second ||
!m_blockchain.txpool_tx_matches_category(id, relay_category::legacy);

1
tests/core_tests/chaingen_main.cpp
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@ -161,6 +161,7 @@ int main(int argc, char* argv[])
GENERATE_AND_PLAY(txpool_spend_key_all);
GENERATE_AND_PLAY(txpool_double_spend_norelay);
GENERATE_AND_PLAY(txpool_double_spend_local);
GENERATE_AND_PLAY(txpool_double_spend_keyimage);
// Double spend
GENERATE_AND_PLAY(gen_double_spend_in_tx<false>);

52
tests/core_tests/tx_pool.cpp
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@ -125,10 +125,12 @@ txpool_double_spend_base::txpool_double_spend_base()
, m_no_relay_hashes()
, m_all_hashes()
, m_no_new_index(0)
, m_failed_index(0)
, m_new_timestamp_index(0)
, m_last_tx(crypto::hash{})
{
REGISTER_CALLBACK_METHOD(txpool_double_spend_base, mark_no_new);
REGISTER_CALLBACK_METHOD(txpool_double_spend_base, mark_failed);
REGISTER_CALLBACK_METHOD(txpool_double_spend_base, mark_timestamp_change);
REGISTER_CALLBACK_METHOD(txpool_double_spend_base, timestamp_change_pause);
REGISTER_CALLBACK_METHOD(txpool_double_spend_base, check_unchanged);
@ -143,6 +145,12 @@ bool txpool_double_spend_base::mark_no_new(cryptonote::core& /*c*/, size_t ev_in
return true;
}
bool txpool_double_spend_base::mark_failed(cryptonote::core& /*c*/, size_t ev_index, const std::vector<test_event_entry>& /*events*/)
{
m_failed_index = ev_index + 1;
return true;
}
bool txpool_double_spend_base::mark_timestamp_change(cryptonote::core& /*c*/, size_t ev_index, const std::vector<test_event_entry>& /*events*/)
{
m_new_timestamp_index = ev_index + 1;
@ -483,6 +491,8 @@ bool txpool_double_spend_base::check_tx_verification_context(const cryptonote::t
m_last_tx = cryptonote::get_transaction_hash(tx);
if (m_no_new_index == event_idx)
return !tvc.m_verifivation_failed && !tx_added;
else if (m_failed_index == event_idx)
return tvc.m_verifivation_failed;// && !tx_added;
else
return !tvc.m_verifivation_failed && tx_added;
}
@ -559,3 +569,45 @@ bool txpool_double_spend_local::generate(std::vector<test_event_entry>& events)
return true;
}
bool txpool_double_spend_keyimage::generate(std::vector<test_event_entry>& events) const
{
INIT_MEMPOOL_TEST();
DO_CALLBACK(events, "check_txpool_spent_keys");
SET_EVENT_VISITOR_SETT(events, event_visitor_settings::set_local_relay);
DO_CALLBACK(events, "mark_no_new");
const std::size_t tx_index1 = events.size();
MAKE_TX(events, tx_0, miner_account, bob_account, send_amount, blk_0);
DO_CALLBACK(events, "increase_all_tx_count");
DO_CALLBACK(events, "check_txpool_spent_keys");
DO_CALLBACK(events, "mark_timestamp_change");
DO_CALLBACK(events, "check_new_hidden");
DO_CALLBACK(events, "timestamp_change_pause");
DO_CALLBACK(events, "mark_no_new");
const std::size_t tx_index2 = events.size();
events.push_back(tx_0);
DO_CALLBACK(events, "check_txpool_spent_keys");
DO_CALLBACK(events, "mark_timestamp_change");
DO_CALLBACK(events, "check_unchanged");
// use same key image with different id
cryptonote::transaction tx_1;
{
auto events_copy = events;
events_copy.erase(events_copy.begin() + tx_index1);
events_copy.erase(events_copy.begin() + tx_index2 - 1);
MAKE_TX(events_copy, tx_temp, miner_account, bob_account, send_amount, blk_0);
tx_1 = tx_temp;
}
// same key image
DO_CALLBACK(events, "timestamp_change_pause");
DO_CALLBACK(events, "mark_failed");
events.push_back(tx_1);
DO_CALLBACK(events, "check_unchanged");
return true;
}

11
tests/core_tests/tx_pool.h
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@ -77,6 +77,7 @@ class txpool_double_spend_base : public txpool_base
std::unordered_set<crypto::hash> m_no_relay_hashes;
std::unordered_map<crypto::hash, uint64_t> m_all_hashes;
size_t m_no_new_index;
size_t m_failed_index;
size_t m_new_timestamp_index;
crypto::hash m_last_tx;
@ -86,6 +87,7 @@ public:
txpool_double_spend_base();
bool mark_no_new(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
bool mark_failed(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
bool mark_timestamp_change(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
//! Pause for 1 second, so that `receive_time` for tx meta changes (tx hidden from public rpc being updated)
@ -116,3 +118,12 @@ struct txpool_double_spend_local : txpool_double_spend_base
bool generate(std::vector<test_event_entry>& events) const;
};
struct txpool_double_spend_keyimage : txpool_double_spend_base
{
txpool_double_spend_keyimage()
: txpool_double_spend_base()
{}
bool generate(std::vector<test_event_entry>& events) const;
};