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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
// Copyright (c) 2013-2022 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 <consensus/tx_check.h>
#include <consensus/validation.h>
#include <hash.h>
#include <script/interpreter.h>
#include <script/script.h>
#include <serialize.h>
#include <streams.h>
#include <test/data/sighash.json.h>
#include <test/util/json.h>
#include <test/util/random.h>
#include <test/util/setup_common.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <version.h>
#include <iostream>
#include <boost/test/unit_test.hpp>
#include <univalue.h>
// Old script.cpp SignatureHash function
uint256 static SignatureHashOld(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType)
{
if (nIn >= txTo.vin.size())
{
return uint256::ONE;
}
CMutableTransaction txTmp(txTo);
// In case concatenating two scripts ends up with two codeseparators,
// or an extra one at the end, this prevents all those possible incompatibilities.
FindAndDelete(scriptCode, CScript(OP_CODESEPARATOR));
// Blank out other inputs' signatures
for (unsigned int i = 0; i < txTmp.vin.size(); i++)
txTmp.vin[i].scriptSig = CScript();
txTmp.vin[nIn].scriptSig = scriptCode;
// Blank out some of the outputs
if ((nHashType & 0x1f) == SIGHASH_NONE)
{
// Wildcard payee
txTmp.vout.clear();
// Let the others update at will
for (unsigned int i = 0; i < txTmp.vin.size(); i++)
if (i != nIn)
txTmp.vin[i].nSequence = 0;
}
else if ((nHashType & 0x1f) == SIGHASH_SINGLE)
{
// Only lock-in the txout payee at same index as txin
unsigned int nOut = nIn;
if (nOut >= txTmp.vout.size())
{
return uint256::ONE;
}
txTmp.vout.resize(nOut+1);
for (unsigned int i = 0; i < nOut; i++)
txTmp.vout[i].SetNull();
// Let the others update at will
for (unsigned int i = 0; i < txTmp.vin.size(); i++)
if (i != nIn)
txTmp.vin[i].nSequence = 0;
}
// Blank out other inputs completely, not recommended for open transactions
if (nHashType & SIGHASH_ANYONECANPAY)
{
txTmp.vin[0] = txTmp.vin[nIn];
txTmp.vin.resize(1);
}
// Serialize and hash
CHashWriter ss(SER_GETHASH, SERIALIZE_TRANSACTION_NO_WITNESS);
ss << txTmp << nHashType;
return ss.GetHash();
}
void static RandomScript(CScript &script) {
static const opcodetype oplist[] = {OP_FALSE, OP_1, OP_2, OP_3, OP_CHECKSIG, OP_IF, OP_VERIF, OP_RETURN, OP_CODESEPARATOR};
script = CScript();
int ops = (InsecureRandRange(10));
for (int i=0; i<ops; i++)
script << oplist[InsecureRandRange(std::size(oplist))];
}
void static RandomTransaction(CMutableTransaction& tx, bool fSingle)
{
tx.nVersion = int(InsecureRand32());
tx.vin.clear();
tx.vout.clear();
tx.nLockTime = (InsecureRandBool()) ? InsecureRand32() : 0;
int ins = (InsecureRandBits(2)) + 1;
int outs = fSingle ? ins : (InsecureRandBits(2)) + 1;
for (int in = 0; in < ins; in++) {
tx.vin.push_back(CTxIn());
CTxIn &txin = tx.vin.back();
txin.prevout.hash = InsecureRand256();
txin.prevout.n = InsecureRandBits(2);
RandomScript(txin.scriptSig);
txin.nSequence = (InsecureRandBool()) ? InsecureRand32() : std::numeric_limits<uint32_t>::max();
}
for (int out = 0; out < outs; out++) {
tx.vout.push_back(CTxOut());
CTxOut &txout = tx.vout.back();
txout.nValue = InsecureRandMoneyAmount();
RandomScript(txout.scriptPubKey);
}
}
BOOST_FIXTURE_TEST_SUITE(sighash_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(sighash_test)
{
#if defined(PRINT_SIGHASH_JSON)
std::cout << "[\n";
std::cout << "\t[\"raw_transaction, script, input_index, hashType, signature_hash (result)\"],\n";
int nRandomTests = 500;
#else
int nRandomTests = 50000;
#endif
for (int i=0; i<nRandomTests; i++) {
int nHashType{int(InsecureRand32())};
CMutableTransaction txTo;
RandomTransaction(txTo, (nHashType & 0x1f) == SIGHASH_SINGLE);
CScript scriptCode;
RandomScript(scriptCode);
int nIn = InsecureRandRange(txTo.vin.size());
uint256 sh, sho;
sho = SignatureHashOld(scriptCode, CTransaction(txTo), nIn, nHashType);
sh = SignatureHash(scriptCode, txTo, nIn, nHashType, 0, SigVersion::BASE);
#if defined(PRINT_SIGHASH_JSON)
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
ss << txTo;
std::cout << "\t[\"" ;
std::cout << HexStr(ss) << "\", \"";
std::cout << HexStr(scriptCode) << "\", ";
std::cout << nIn << ", ";
std::cout << nHashType << ", \"";
std::cout << sho.GetHex() << "\"]";
if (i+1 != nRandomTests) {
std::cout << ",";
}
std::cout << "\n";
#endif
BOOST_CHECK(sh == sho);
}
#if defined(PRINT_SIGHASH_JSON)
std::cout << "]\n";
#endif
}
// Goal: check that SignatureHash generates correct hash
BOOST_AUTO_TEST_CASE(sighash_from_data)
{
UniValue tests = read_json(std::string(json_tests::sighash, json_tests::sighash + sizeof(json_tests::sighash)));
for (unsigned int idx = 0; idx < tests.size(); idx++) {
const UniValue& test = tests[idx];
std::string strTest = test.write();
if (test.size() < 1) // Allow for extra stuff (useful for comments)
{
BOOST_ERROR("Bad test: " << strTest);
continue;
}
if (test.size() == 1) continue; // comment
std::string raw_tx, raw_script, sigHashHex;
int nIn, nHashType;
uint256 sh;
CTransactionRef tx;
CScript scriptCode = CScript();
try {
// deserialize test data
raw_tx = test[0].get_str();
raw_script = test[1].get_str();
nIn = test[2].getInt<int>();
nHashType = test[3].getInt<int>();
sigHashHex = test[4].get_str();
CDataStream stream(ParseHex(raw_tx), SER_NETWORK, PROTOCOL_VERSION);
stream >> tx;
TxValidationState state;
BOOST_CHECK_MESSAGE(CheckTransaction(*tx, state), strTest);
BOOST_CHECK(state.IsValid());
std::vector<unsigned char> raw = ParseHex(raw_script);
scriptCode.insert(scriptCode.end(), raw.begin(), raw.end());
} catch (...) {
BOOST_ERROR("Bad test, couldn't deserialize data: " << strTest);
continue;
}
sh = SignatureHash(scriptCode, *tx, nIn, nHashType, 0, SigVersion::BASE);
BOOST_CHECK_MESSAGE(sh.GetHex() == sigHashHex, strTest);
}
}
BOOST_AUTO_TEST_SUITE_END()
|
