1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// 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 H_BITCOIN_SCRIPT_INTERPRETER
#define H_BITCOIN_SCRIPT_INTERPRETER
#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),
};
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 // H_BITCOIN_SCRIPT_INTERPRETER
|
