rpc: new sanity check on relayed transactions

This will weed out some transactions with silly rings
This commit is contained in:
moneromooo-monero 2019-04-12 20:20:20 +00:00
parent 9c77dbf376
commit ccb996afc6
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
7 changed files with 154 additions and 1 deletions

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@ -30,6 +30,7 @@ set(cryptonote_core_sources
blockchain.cpp
cryptonote_core.cpp
tx_pool.cpp
tx_sanity_check.cpp
cryptonote_tx_utils.cpp)
set(cryptonote_core_headers)
@ -39,6 +40,7 @@ set(cryptonote_core_private_headers
blockchain.h
cryptonote_core.h
tx_pool.h
tx_sanity_check.h
cryptonote_tx_utils.h)
monero_private_headers(cryptonote_core

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@ -0,0 +1,100 @@
// Copyright (c) 2019, The Monero 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 <stdint.h>
#include <vector>
#include "cryptonote_basic/cryptonote_basic_impl.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "blockchain.h"
#include "tx_sanity_check.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "txsanity"
namespace cryptonote
{
bool tx_sanity_check(Blockchain &blockchain, const cryptonote::blobdata &tx_blob)
{
cryptonote::transaction tx;
if (!cryptonote::parse_and_validate_tx_from_blob(tx_blob, tx))
{
MERROR("Failed to parse transaction");
return false;
}
if (cryptonote::is_coinbase(tx))
{
MERROR("Transaction is coinbase");
return false;
}
std::set<uint64_t> rct_indices;
size_t n_indices = 0;
for (const auto &txin : tx.vin)
{
if (txin.type() != typeid(cryptonote::txin_to_key))
continue;
const cryptonote::txin_to_key &in_to_key = boost::get<cryptonote::txin_to_key>(txin);
if (in_to_key.amount != 0)
continue;
const std::vector<uint64_t> absolute = cryptonote::relative_output_offsets_to_absolute(in_to_key.key_offsets);
for (uint64_t offset: absolute)
rct_indices.insert(offset);
n_indices += in_to_key.key_offsets.size();
}
if (n_indices <= 10)
{
MERROR("n_indices is only " << n_indices);
return true;
}
uint64_t n_available = blockchain.get_num_mature_outputs(0);
if (n_available < 10000)
return true;
if (rct_indices.size() < n_indices * 9 / 10)
{
MERROR("unique indices is only " << rct_indices.size() << "/" << n_indices);
return false;
}
std::vector<uint64_t> offsets(rct_indices.begin(), rct_indices.end());
uint64_t median = epee::misc_utils::median(offsets);
if (median < n_available * 9 / 10)
{
MERROR("median is " << median << "/" << n_available);
return false;
}
return true;
}
}

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@ -0,0 +1,36 @@
// Copyright (c) 2019, The Monero 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 "cryptonote_basic/blobdatatype.h"
namespace cryptonote
{
class Blockchain;
bool tx_sanity_check(Blockchain &blockchain, const cryptonote::blobdata &tx_blob);
}

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@ -41,6 +41,7 @@ using namespace epee;
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "cryptonote_basic/account.h"
#include "cryptonote_basic/cryptonote_basic_impl.h"
#include "cryptonote_core/tx_sanity_check.h"
#include "misc_language.h"
#include "net/parse.h"
#include "storages/http_abstract_invoke.h"
@ -844,6 +845,14 @@ namespace cryptonote
return true;
}
if (req.do_sanity_checks && !cryptonote::tx_sanity_check(m_core.get_blockchain_storage(), tx_blob))
{
res.status = "Failed";
res.reason = "Sanity check failed";
res.sanity_check_failed = true;
return true;
}
cryptonote_connection_context fake_context = AUTO_VAL_INIT(fake_context);
tx_verification_context tvc = AUTO_VAL_INIT(tvc);
if(!m_core.handle_incoming_tx(tx_blob, tvc, false, false, req.do_not_relay) || tvc.m_verifivation_failed)

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@ -577,10 +577,12 @@ namespace cryptonote
{
std::string tx_as_hex;
bool do_not_relay;
bool do_sanity_checks;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(tx_as_hex)
KV_SERIALIZE_OPT(do_not_relay, false)
KV_SERIALIZE_OPT(do_sanity_checks, true)
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<request_t> request;
@ -599,6 +601,7 @@ namespace cryptonote
bool overspend;
bool fee_too_low;
bool not_rct;
bool sanity_check_failed;
bool untrusted;
BEGIN_KV_SERIALIZE_MAP()
@ -613,6 +616,7 @@ namespace cryptonote
KV_SERIALIZE(overspend)
KV_SERIALIZE(fee_too_low)
KV_SERIALIZE(not_rct)
KV_SERIALIZE(sanity_check_failed)
KV_SERIALIZE(untrusted)
END_KV_SERIALIZE_MAP()
};

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@ -5988,6 +5988,7 @@ void wallet2::commit_tx(pending_tx& ptx)
COMMAND_RPC_SEND_RAW_TX::request req;
req.tx_as_hex = epee::string_tools::buff_to_hex_nodelimer(tx_to_blob(ptx.tx));
req.do_not_relay = false;
req.do_sanity_checks = true;
COMMAND_RPC_SEND_RAW_TX::response daemon_send_resp;
m_daemon_rpc_mutex.lock();
bool r = epee::net_utils::invoke_http_json("/sendrawtransaction", req, daemon_send_resp, m_http_client, rpc_timeout);

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@ -50,10 +50,11 @@ class Daemon(object):
}
return self.rpc.send_json_rpc_request(getblocktemplate)
def send_raw_transaction(self, tx_as_hex, do_not_relay = False):
def send_raw_transaction(self, tx_as_hex, do_not_relay = False, do_sanity_checks = True):
send_raw_transaction = {
'tx_as_hex': tx_as_hex,
'do_not_relay': do_not_relay,
'do_sanity_checks': do_sanity_checks,
}
return self.rpc.send_request("/send_raw_transaction", send_raw_transaction)