diff options
Diffstat (limited to 'src/test/fuzz/p2p_transport_serialization.cpp')
-rw-r--r-- | src/test/fuzz/p2p_transport_serialization.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/test/fuzz/p2p_transport_serialization.cpp b/src/test/fuzz/p2p_transport_serialization.cpp new file mode 100644 index 0000000000..edee5aeef7 --- /dev/null +++ b/src/test/fuzz/p2p_transport_serialization.cpp @@ -0,0 +1,85 @@ +// Copyright (c) 2019-2020 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include <chainparams.h> +#include <hash.h> +#include <net.h> +#include <netmessagemaker.h> +#include <protocol.h> +#include <test/fuzz/FuzzedDataProvider.h> +#include <test/fuzz/fuzz.h> + +#include <cassert> +#include <cstdint> +#include <limits> +#include <optional> +#include <vector> + +void initialize_p2p_transport_serialization() +{ + SelectParams(CBaseChainParams::REGTEST); +} + +FUZZ_TARGET_INIT(p2p_transport_serialization, initialize_p2p_transport_serialization) +{ + // Construct deserializer, with a dummy NodeId + V1TransportDeserializer deserializer{Params(), (NodeId)0, SER_NETWORK, INIT_PROTO_VERSION}; + V1TransportSerializer serializer{}; + FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()}; + + auto checksum_assist = fuzzed_data_provider.ConsumeBool(); + auto magic_bytes_assist = fuzzed_data_provider.ConsumeBool(); + std::vector<uint8_t> mutable_msg_bytes; + + auto header_bytes_remaining = CMessageHeader::HEADER_SIZE; + if (magic_bytes_assist) { + auto msg_start = Params().MessageStart(); + for (size_t i = 0; i < CMessageHeader::MESSAGE_SIZE_SIZE; ++i) { + mutable_msg_bytes.push_back(msg_start[i]); + } + header_bytes_remaining -= CMessageHeader::MESSAGE_SIZE_SIZE; + } + + if (checksum_assist) { + header_bytes_remaining -= CMessageHeader::CHECKSUM_SIZE; + } + + auto header_random_bytes = fuzzed_data_provider.ConsumeBytes<uint8_t>(header_bytes_remaining); + mutable_msg_bytes.insert(mutable_msg_bytes.end(), header_random_bytes.begin(), header_random_bytes.end()); + auto payload_bytes = fuzzed_data_provider.ConsumeRemainingBytes<uint8_t>(); + + if (checksum_assist && mutable_msg_bytes.size() == CMessageHeader::CHECKSUM_OFFSET) { + CHash256 hasher; + unsigned char hsh[32]; + hasher.Write(payload_bytes); + hasher.Finalize(hsh); + for (size_t i = 0; i < CMessageHeader::CHECKSUM_SIZE; ++i) { + mutable_msg_bytes.push_back(hsh[i]); + } + } + + mutable_msg_bytes.insert(mutable_msg_bytes.end(), payload_bytes.begin(), payload_bytes.end()); + Span<const uint8_t> msg_bytes{mutable_msg_bytes}; + while (msg_bytes.size() > 0) { + const int handled = deserializer.Read(msg_bytes); + if (handled < 0) { + break; + } + if (deserializer.Complete()) { + const std::chrono::microseconds m_time{std::numeric_limits<int64_t>::max()}; + uint32_t out_err_raw_size{0}; + std::optional<CNetMessage> result{deserializer.GetMessage(m_time, out_err_raw_size)}; + if (result) { + assert(result->m_command.size() <= CMessageHeader::COMMAND_SIZE); + assert(result->m_raw_message_size <= mutable_msg_bytes.size()); + assert(result->m_raw_message_size == CMessageHeader::HEADER_SIZE + result->m_message_size); + assert(result->m_time == m_time); + + std::vector<unsigned char> header; + auto msg = CNetMsgMaker{result->m_recv.GetVersion()}.Make(result->m_command, MakeUCharSpan(result->m_recv)); + serializer.prepareForTransport(msg, header); + } + } + } +} |