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-BEGIN VERIFY SCRIPT-
ren() { sed --regexp-extended -i "s|$1|$2|g" $(git grep -l --extended-regexp "$1"); }
# Replace FUZZ_TARGET_INIT
ren 'FUZZ_TARGET_INIT\((.+), (.+)\)' 'FUZZ_TARGET(\1, .init = \2)'
# Delete unused FUZZ_TARGET_INIT
sed -i -e '37,39d' src/test/fuzz/fuzz.h
-END VERIFY SCRIPT-
84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
// Copyright (c) 2019-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <chainparams.h>
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#include <hash.h>
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#include <net.h>
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#include <netmessagemaker.h>
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#include <protocol.h>
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#include <test/fuzz/FuzzedDataProvider.h>
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#include <test/fuzz/fuzz.h>
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#include <util/chaintype.h>
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#include <cassert>
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#include <cstdint>
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#include <limits>
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#include <optional>
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#include <vector>
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void initialize_p2p_transport_serialization()
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{
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SelectParams(ChainType::REGTEST);
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}
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FUZZ_TARGET(p2p_transport_serialization, .init = initialize_p2p_transport_serialization)
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{
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// Construct deserializer, with a dummy NodeId
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V1TransportDeserializer deserializer{Params(), NodeId{0}, SER_NETWORK, INIT_PROTO_VERSION};
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V1TransportSerializer serializer{};
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FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
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auto checksum_assist = fuzzed_data_provider.ConsumeBool();
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auto magic_bytes_assist = fuzzed_data_provider.ConsumeBool();
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std::vector<uint8_t> mutable_msg_bytes;
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auto header_bytes_remaining = CMessageHeader::HEADER_SIZE;
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if (magic_bytes_assist) {
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auto msg_start = Params().MessageStart();
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for (size_t i = 0; i < CMessageHeader::MESSAGE_SIZE_SIZE; ++i) {
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mutable_msg_bytes.push_back(msg_start[i]);
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}
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header_bytes_remaining -= CMessageHeader::MESSAGE_SIZE_SIZE;
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}
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if (checksum_assist) {
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header_bytes_remaining -= CMessageHeader::CHECKSUM_SIZE;
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}
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auto header_random_bytes = fuzzed_data_provider.ConsumeBytes<uint8_t>(header_bytes_remaining);
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mutable_msg_bytes.insert(mutable_msg_bytes.end(), header_random_bytes.begin(), header_random_bytes.end());
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auto payload_bytes = fuzzed_data_provider.ConsumeRemainingBytes<uint8_t>();
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if (checksum_assist && mutable_msg_bytes.size() == CMessageHeader::CHECKSUM_OFFSET) {
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CHash256 hasher;
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unsigned char hsh[32];
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hasher.Write(payload_bytes);
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hasher.Finalize(hsh);
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for (size_t i = 0; i < CMessageHeader::CHECKSUM_SIZE; ++i) {
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mutable_msg_bytes.push_back(hsh[i]);
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}
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}
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mutable_msg_bytes.insert(mutable_msg_bytes.end(), payload_bytes.begin(), payload_bytes.end());
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Span<const uint8_t> msg_bytes{mutable_msg_bytes};
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while (msg_bytes.size() > 0) {
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const int handled = deserializer.Read(msg_bytes);
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if (handled < 0) {
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break;
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}
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if (deserializer.Complete()) {
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const std::chrono::microseconds m_time{std::numeric_limits<int64_t>::max()};
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bool reject_message{false};
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CNetMessage msg = deserializer.GetMessage(m_time, reject_message);
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assert(msg.m_type.size() <= CMessageHeader::COMMAND_SIZE);
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assert(msg.m_raw_message_size <= mutable_msg_bytes.size());
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assert(msg.m_raw_message_size == CMessageHeader::HEADER_SIZE + msg.m_message_size);
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assert(msg.m_time == m_time);
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std::vector<unsigned char> header;
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auto msg2 = CNetMsgMaker{msg.m_recv.GetVersion()}.Make(msg.m_type, Span{msg.m_recv});
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serializer.prepareForTransport(msg2, header);
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}
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}
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}
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