bitcoin/src/test/fuzz/script_ops.cpp

// Copyright (c) 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 <script/script.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>

#include <cstdint>
#include <string>
#include <vector>

FUZZ_TARGET(script_ops)
{
    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
    CScript script = ConsumeScript(fuzzed_data_provider);
    while (fuzzed_data_provider.remaining_bytes() > 0) {
        switch (fuzzed_data_provider.ConsumeIntegralInRange(0, 7)) {
        case 0: {
            CScript s = ConsumeScript(fuzzed_data_provider);
            script = std::move(s);
            break;
        }
        case 1: {
            const CScript& s = ConsumeScript(fuzzed_data_provider);
            script = s;
            break;
        }
        case 2:
            script << fuzzed_data_provider.ConsumeIntegral<int64_t>();
            break;
        case 3:
            script << ConsumeOpcodeType(fuzzed_data_provider);
            break;
        case 4:
            script << ConsumeScriptNum(fuzzed_data_provider);
            break;
        case 5:
            script << ConsumeRandomLengthByteVector(fuzzed_data_provider);
            break;
        case 6:
            script.clear();
            break;
        case 7: {
            (void)script.GetSigOpCount(false);
            (void)script.GetSigOpCount(true);
            (void)script.GetSigOpCount(script);
            (void)script.HasValidOps();
            (void)script.IsPayToScriptHash();
            (void)script.IsPayToWitnessScriptHash();
            (void)script.IsPushOnly();
            (void)script.IsUnspendable();
            {
                CScript::const_iterator pc = script.begin();
                opcodetype opcode;
                (void)script.GetOp(pc, opcode);
                std::vector<uint8_t> data;
                (void)script.GetOp(pc, opcode, data);
                (void)script.IsPushOnly(pc);
            }
            {
                int version;
                std::vector<uint8_t> program;
                (void)script.IsWitnessProgram(version, program);
            }
            break;
        }
        }
    }
}