Hush Full Node software. We were censored from Github, this is where all development happens now.
https://hush.is
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
3.4 KiB
91 lines
3.4 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2009-2014 The Bitcoin developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#ifndef BITCOIN_SCRIPT_INTERPRETER_H
|
|
#define BITCOIN_SCRIPT_INTERPRETER_H
|
|
|
|
#include <vector>
|
|
#include <stdint.h>
|
|
#include <string>
|
|
|
|
class CPubKey;
|
|
class CScript;
|
|
class CTransaction;
|
|
class uint256;
|
|
|
|
/** Signature hash types/flags */
|
|
enum
|
|
{
|
|
SIGHASH_ALL = 1,
|
|
SIGHASH_NONE = 2,
|
|
SIGHASH_SINGLE = 3,
|
|
SIGHASH_ANYONECANPAY = 0x80,
|
|
};
|
|
|
|
/** Script verification flags */
|
|
enum
|
|
{
|
|
SCRIPT_VERIFY_NONE = 0,
|
|
|
|
// Evaluate P2SH subscripts (softfork safe, BIP16).
|
|
SCRIPT_VERIFY_P2SH = (1U << 0),
|
|
|
|
// Passing a non-strict-DER signature or one with undefined hashtype to a checksig operation causes script failure.
|
|
// Passing a pubkey that is not (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes) to checksig causes that pubkey to be
|
|
// skipped (not softfork safe: this flag can widen the validity of OP_CHECKSIG OP_NOT).
|
|
SCRIPT_VERIFY_STRICTENC = (1U << 1),
|
|
|
|
// Passing a non-strict-DER signature to a checksig operation causes script failure (softfork safe, BIP62 rule 1)
|
|
SCRIPT_VERIFY_DERSIG = (1U << 2),
|
|
|
|
// Passing a non-strict-DER signature or one with S > order/2 to a checksig operation causes script failure
|
|
// (softfork safe, BIP62 rule 5).
|
|
SCRIPT_VERIFY_LOW_S = (1U << 3),
|
|
|
|
// verify dummy stack item consumed by CHECKMULTISIG is of zero-length (softfork safe, BIP62 rule 7).
|
|
SCRIPT_VERIFY_NULLDUMMY = (1U << 4),
|
|
|
|
// Using a non-push operator in the scriptSig causes script failure (softfork safe, BIP62 rule 2).
|
|
SCRIPT_VERIFY_SIGPUSHONLY = (1U << 5),
|
|
|
|
// Require minimal encodings for all push operations (OP_0... OP_16, OP_1NEGATE where possible, direct
|
|
// pushes up to 75 bytes, OP_PUSHDATA up to 255 bytes, OP_PUSHDATA2 for anything larger). Evaluating
|
|
// any other push causes the script to fail (BIP62 rule 3).
|
|
// In addition, whenever a stack element is interpreted as a number, it must be of minimal length (BIP62 rule 4).
|
|
// (softfork safe)
|
|
SCRIPT_VERIFY_MINIMALDATA = (1U << 6)
|
|
};
|
|
|
|
uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
|
|
|
|
class BaseSignatureChecker
|
|
{
|
|
public:
|
|
virtual bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
virtual ~BaseSignatureChecker() {}
|
|
};
|
|
|
|
class SignatureChecker : public BaseSignatureChecker
|
|
{
|
|
private:
|
|
const CTransaction& txTo;
|
|
unsigned int nIn;
|
|
|
|
protected:
|
|
virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
|
|
|
|
public:
|
|
SignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
|
|
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const;
|
|
};
|
|
|
|
bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker);
|
|
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, unsigned int flags, const BaseSignatureChecker& checker);
|
|
|
|
#endif // BITCOIN_SCRIPT_INTERPRETER_H
|
|
|