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e337145577
Before commit: Unable to deserialize : 0% Wrong message start : ~45.62% Header too large : ~14.5% Wrong checksum : ~38.13% Invalid message type : ~1.78% 304820 NEW cov: 1440 ft: 4452 corp: 92/12551b lim: 2237 exec/s: 3386 rss: 486Mb L: 47/1111 MS: 1 ChangeByte- 1416181 REDUCE cov: 1442 ft: 5681 corp: 125/59Kb lim: 4096 exec/s: 3522 rss: 535Mb L: 2164/4049 MS: 1 EraseBytes- After commit: Unable to deserialize : 0% Wrong message start : ~39.6% Header too large : ~30.85% Wrong checksum : ~25.54% Invalid message type : ~4.01% 302684 NEW cov: 1454 ft: 3936 corp: 84/7056b lim: 2424 exec/s: 4146 rss: 477Mb L: 65/1108 MS: 3 CopyPart-CrossOver-CMP- DE: "\x0e\x00\x00\x00"- 1383925 REDUCE cov: 1454 ft: 4828 corp: 102/14573b lim: 4096 exec/s: 3954 rss: 534Mb L: 116/4050 MS: 2 EraseBytes-ChangeByte-
86 lines
3.3 KiB
C++
86 lines
3.3 KiB
C++
// Copyright (c) 2019-2020 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 <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(CBaseChainParams::REGTEST);
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}
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FUZZ_TARGET_INIT(p2p_transport_serialization, 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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uint32_t out_err_raw_size{0};
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std::optional<CNetMessage> result{deserializer.GetMessage(m_time, out_err_raw_size)};
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if (result) {
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assert(result->m_command.size() <= CMessageHeader::COMMAND_SIZE);
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assert(result->m_raw_message_size <= mutable_msg_bytes.size());
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assert(result->m_raw_message_size == CMessageHeader::HEADER_SIZE + result->m_message_size);
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assert(result->m_time == m_time);
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std::vector<unsigned char> header;
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auto msg = CNetMsgMaker{result->m_recv.GetVersion()}.Make(result->m_command, MakeUCharSpan(result->m_recv));
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serializer.prepareForTransport(msg, header);
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}
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}
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}
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}
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