Differential D1565 Diff 4315 src/script/script_flags.h

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src/script/script_flags.h

This file was copied from src/script/interpreter.h.

// Copyright (c) 2009-2010 Satoshi Nakamoto		// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers		// Copyright (c) 2009-2016 The Bitcoin Core developers
		// Copyright (c) 2017-2018 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying		// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.		// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_SCRIPT_INTERPRETER_H		#ifndef BITCOIN_SCRIPT_SCRIPTFLAGS_H
#define BITCOIN_SCRIPT_INTERPRETER_H		#define BITCOIN_SCRIPT_SCRIPTFLAGS_H

#include "primitives/transaction.h"
#include "script_error.h"
#include "sighashtype.h"

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

class CPubKey;
class CScript;
class CTransaction;
class uint256;

/** Script verification flags */		/** Script verification flags */
enum {		enum {
SCRIPT_VERIFY_NONE = 0,		SCRIPT_VERIFY_NONE = 0,

// Evaluate P2SH subscripts (softfork safe, BIP16).		// Evaluate P2SH subscripts (softfork safe, BIP16).
SCRIPT_VERIFY_P2SH = (1U << 0),		SCRIPT_VERIFY_P2SH = (1U << 0),

▲ Show 20 Lines • Show All 74 Lines • ▼ Show 20 Lines	enum {
//		//
SCRIPT_ENABLE_SIGHASH_FORKID = (1U << 16),		SCRIPT_ENABLE_SIGHASH_FORKID = (1U << 16),

// Do we accept activate replay protection using a different fork id.		// Do we accept activate replay protection using a different fork id.
//		//
SCRIPT_ENABLE_REPLAY_PROTECTION = (1U << 17),		SCRIPT_ENABLE_REPLAY_PROTECTION = (1U << 17),
};		};

bool CheckSignatureEncoding(const std::vector<uint8_t> &vchSig, uint32_t flags,		#endif // BITCOIN_SCRIPT_SCRIPTFLAGS_H
ScriptError *serror);

uint256 SignatureHash(const CScript &scriptCode, const CTransaction &txTo,
unsigned int nIn, SigHashType sigHashType,
const Amount amount,
const PrecomputedTransactionData *cache = nullptr,
uint32_t flags = SCRIPT_ENABLE_SIGHASH_FORKID);

class BaseSignatureChecker {
public:
virtual bool CheckSig(const std::vector<uint8_t> &scriptSig,
const std::vector<uint8_t> &vchPubKey,
const CScript &scriptCode, uint32_t flags) const {
return false;
}

virtual bool CheckLockTime(const CScriptNum &nLockTime) const {
return false;
}

virtual bool CheckSequence(const CScriptNum &nSequence) const {
return false;
}

virtual ~BaseSignatureChecker() {}
};

class TransactionSignatureChecker : public BaseSignatureChecker {
private:
const CTransaction *txTo;
unsigned int nIn;
const Amount amount;
const PrecomputedTransactionData *txdata;

protected:
virtual bool VerifySignature(const std::vector<uint8_t> &vchSig,
const CPubKey &vchPubKey,
const uint256 &sighash) const;

public:
TransactionSignatureChecker(const CTransaction *txToIn, unsigned int nInIn,
const Amount amountIn)
: txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(nullptr) {}
TransactionSignatureChecker(const CTransaction *txToIn, unsigned int nInIn,
const Amount amountIn,
const PrecomputedTransactionData &txdataIn)
: txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(&txdataIn) {}
bool CheckSig(const std::vector<uint8_t> &scriptSig,
const std::vector<uint8_t> &vchPubKey,
const CScript &scriptCode, uint32_t flags) const override;
bool CheckLockTime(const CScriptNum &nLockTime) const override;
bool CheckSequence(const CScriptNum &nSequence) const override;
};

class MutableTransactionSignatureChecker : public TransactionSignatureChecker {
private:
const CTransaction txTo;

public:
MutableTransactionSignatureChecker(const CMutableTransaction *txToIn,
unsigned int nInIn, const Amount amount)
: TransactionSignatureChecker(&txTo, nInIn, amount), txTo(*txToIn) {}
};

bool EvalScript(std::vector<std::vector<uint8_t>> &stack, const CScript &script,
uint32_t flags, const BaseSignatureChecker &checker,
ScriptError *error = nullptr);
bool VerifyScript(const CScript &scriptSig, const CScript &scriptPubKey,
uint32_t flags, const BaseSignatureChecker &checker,
ScriptError *serror = nullptr);

#endif // BITCOIN_SCRIPT_INTERPRETER_H