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// Copyright (c) 2019-2022 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 <compressor.h>
#include <core_io.h>
#include <core_memusage.h>
#include <key_io.h>
#include <policy/policy.h>
#include <pubkey.h>
#include <rpc/util.h>
#include <script/descriptor.h>
#include <script/interpreter.h>
#include <script/script.h>
#include <script/script_error.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <script/standard.h>
#include <streams.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <univalue.h>
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <optional>
#include <string>
#include <vector>
void initialize_script()
{
// Fuzzers using pubkey must hold an ECCVerifyHandle.
static const ECCVerifyHandle verify_handle;
SelectParams(CBaseChainParams::REGTEST);
}
FUZZ_TARGET_INIT(script, initialize_script)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
const CScript script{ConsumeScript(fuzzed_data_provider)};
CompressedScript compressed;
if (CompressScript(script, compressed)) {
const unsigned int size = compressed[0];
compressed.erase(compressed.begin());
assert(size <= 5);
CScript decompressed_script;
const bool ok = DecompressScript(decompressed_script, size, compressed);
assert(ok);
assert(script == decompressed_script);
}
TxoutType which_type;
bool is_standard_ret = IsStandard(script, std::nullopt, which_type);
if (!is_standard_ret) {
assert(which_type == TxoutType::NONSTANDARD ||
which_type == TxoutType::NULL_DATA ||
which_type == TxoutType::MULTISIG);
}
if (which_type == TxoutType::NONSTANDARD) {
assert(!is_standard_ret);
}
if (which_type == TxoutType::NULL_DATA) {
assert(script.IsUnspendable());
}
if (script.IsUnspendable()) {
assert(which_type == TxoutType::NULL_DATA ||
which_type == TxoutType::NONSTANDARD);
}
CTxDestination address;
bool extract_destination_ret = ExtractDestination(script, address);
if (!extract_destination_ret) {
assert(which_type == TxoutType::PUBKEY ||
which_type == TxoutType::NONSTANDARD ||
which_type == TxoutType::NULL_DATA ||
which_type == TxoutType::MULTISIG);
}
if (which_type == TxoutType::NONSTANDARD ||
which_type == TxoutType::NULL_DATA ||
which_type == TxoutType::MULTISIG) {
assert(!extract_destination_ret);
}
const FlatSigningProvider signing_provider;
(void)InferDescriptor(script, signing_provider);
(void)IsSegWitOutput(signing_provider, script);
(void)RecursiveDynamicUsage(script);
std::vector<std::vector<unsigned char>> solutions;
(void)Solver(script, solutions);
(void)script.HasValidOps();
(void)script.IsPayToScriptHash();
(void)script.IsPayToWitnessScriptHash();
(void)script.IsPushOnly();
(void)script.GetSigOpCount(/* fAccurate= */ false);
{
const std::vector<uint8_t> bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
CompressedScript compressed_script;
compressed_script.assign(bytes.begin(), bytes.end());
// DecompressScript(..., ..., bytes) is not guaranteed to be defined if the bytes vector is too short
if (compressed_script.size() >= 32) {
CScript decompressed_script;
DecompressScript(decompressed_script, fuzzed_data_provider.ConsumeIntegral<unsigned int>(), compressed_script);
}
}
const std::optional<CScript> other_script = ConsumeDeserializable<CScript>(fuzzed_data_provider);
if (other_script) {
{
CScript script_mut{script};
(void)FindAndDelete(script_mut, *other_script);
}
const std::vector<std::string> random_string_vector = ConsumeRandomLengthStringVector(fuzzed_data_provider);
const uint32_t u32{fuzzed_data_provider.ConsumeIntegral<uint32_t>()};
const uint32_t flags{u32 | SCRIPT_VERIFY_P2SH};
{
CScriptWitness wit;
for (const auto& s : random_string_vector) {
wit.stack.emplace_back(s.begin(), s.end());
}
(void)CountWitnessSigOps(script, *other_script, &wit, flags);
wit.SetNull();
}
}
(void)GetOpName(ConsumeOpcodeType(fuzzed_data_provider));
(void)ScriptErrorString(static_cast<ScriptError>(fuzzed_data_provider.ConsumeIntegralInRange<int>(0, SCRIPT_ERR_ERROR_COUNT)));
{
const std::vector<uint8_t> bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
CScript append_script{bytes.begin(), bytes.end()};
append_script << fuzzed_data_provider.ConsumeIntegral<int64_t>();
append_script << ConsumeOpcodeType(fuzzed_data_provider);
append_script << CScriptNum{fuzzed_data_provider.ConsumeIntegral<int64_t>()};
append_script << ConsumeRandomLengthByteVector(fuzzed_data_provider);
}
{
const CTxDestination tx_destination_1{
fuzzed_data_provider.ConsumeBool() ?
DecodeDestination(fuzzed_data_provider.ConsumeRandomLengthString()) :
ConsumeTxDestination(fuzzed_data_provider)};
const CTxDestination tx_destination_2{ConsumeTxDestination(fuzzed_data_provider)};
const std::string encoded_dest{EncodeDestination(tx_destination_1)};
const UniValue json_dest{DescribeAddress(tx_destination_1)};
Assert(tx_destination_1 == DecodeDestination(encoded_dest));
(void)GetKeyForDestination(/*store=*/{}, tx_destination_1);
const CScript dest{GetScriptForDestination(tx_destination_1)};
const bool valid{IsValidDestination(tx_destination_1)};
Assert(dest.empty() != valid);
Assert(valid == IsValidDestinationString(encoded_dest));
(void)(tx_destination_1 < tx_destination_2);
if (tx_destination_1 == tx_destination_2) {
Assert(encoded_dest == EncodeDestination(tx_destination_2));
Assert(json_dest.write() == DescribeAddress(tx_destination_2).write());
Assert(dest == GetScriptForDestination(tx_destination_2));
}
}
}
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