mirror of https://github.com/bitcoin/bitcoin
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
// Copyright (c) 2009-2021 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 <consensus/amount.h>
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#include <pubkey.h>
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#include <script/interpreter.h>
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#include <streams.h>
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#include <test/util/script.h>
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#include <version.h>
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#include <test/fuzz/fuzz.h>
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FUZZ_TARGET(script_flags)
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{
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CDataStream ds(buffer, SER_NETWORK, INIT_PROTO_VERSION);
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try {
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int nVersion;
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ds >> nVersion;
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ds.SetVersion(nVersion);
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} catch (const std::ios_base::failure&) {
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return;
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}
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try {
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const CTransaction tx(deserialize, ds);
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unsigned int verify_flags;
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ds >> verify_flags;
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if (!IsValidFlagCombination(verify_flags)) return;
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unsigned int fuzzed_flags;
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ds >> fuzzed_flags;
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std::vector<CTxOut> spent_outputs;
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for (unsigned i = 0; i < tx.vin.size(); ++i) {
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CTxOut prevout;
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ds >> prevout;
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if (!MoneyRange(prevout.nValue)) {
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// prevouts should be consensus-valid
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prevout.nValue = 1;
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}
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spent_outputs.push_back(prevout);
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}
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PrecomputedTransactionData txdata;
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txdata.Init(tx, std::move(spent_outputs));
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for (unsigned i = 0; i < tx.vin.size(); ++i) {
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const CTxOut& prevout = txdata.m_spent_outputs.at(i);
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const TransactionSignatureChecker checker{&tx, i, prevout.nValue, txdata, MissingDataBehavior::ASSERT_FAIL};
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ScriptError serror;
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const bool ret = VerifyScript(tx.vin.at(i).scriptSig, prevout.scriptPubKey, &tx.vin.at(i).scriptWitness, verify_flags, checker, &serror);
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assert(ret == (serror == SCRIPT_ERR_OK));
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// Verify that removing flags from a passing test or adding flags to a failing test does not change the result
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if (ret) {
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verify_flags &= ~fuzzed_flags;
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} else {
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verify_flags |= fuzzed_flags;
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}
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if (!IsValidFlagCombination(verify_flags)) return;
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ScriptError serror_fuzzed;
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const bool ret_fuzzed = VerifyScript(tx.vin.at(i).scriptSig, prevout.scriptPubKey, &tx.vin.at(i).scriptWitness, verify_flags, checker, &serror_fuzzed);
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assert(ret_fuzzed == (serror_fuzzed == SCRIPT_ERR_OK));
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assert(ret_fuzzed == ret);
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}
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} catch (const std::ios_base::failure&) {
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return;
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}
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}
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