sigopcount_tests.cpp raw
1 // Copyright (c) 2012-2022 The Limenka developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5 #include <addresstype.h>
6 #include <coins.h>
7 #include <consensus/consensus.h>
8 #include <consensus/tx_verify.h>
9 #include <key.h>
10 #include <pubkey.h>
11 #include <script/interpreter.h>
12 #include <script/script.h>
13 #include <script/solver.h>
14 #include <test/util/setup_common.h>
15 #include <uint256.h>
16
17 #include <vector>
18
19 #include <boost/test/unit_test.hpp>
20
21 // Helpers:
22 static std::vector<unsigned char>
23 Serialize(const CScript& s)
24 {
25 std::vector<unsigned char> sSerialized(s.begin(), s.end());
26 return sSerialized;
27 }
28
29 BOOST_FIXTURE_TEST_SUITE(sigopcount_tests, BasicTestingSetup)
30
31 BOOST_AUTO_TEST_CASE(GetSigOpCount)
32 {
33 // Test CScript::GetSigOpCount()
34 CScript s1;
35 BOOST_CHECK_EQUAL(s1.GetSigOpCount(false), 0U);
36 BOOST_CHECK_EQUAL(s1.GetSigOpCount(true), 0U);
37
38 uint160 dummy;
39 s1 << OP_1 << ToByteVector(dummy) << ToByteVector(dummy) << OP_2 << OP_CHECKMULTISIG;
40 BOOST_CHECK_EQUAL(s1.GetSigOpCount(true), 2U);
41 s1 << OP_IF << OP_CHECKSIG << OP_ENDIF;
42 BOOST_CHECK_EQUAL(s1.GetSigOpCount(true), 3U);
43 BOOST_CHECK_EQUAL(s1.GetSigOpCount(false), 21U);
44
45 CScript p2sh = GetScriptForDestination(ScriptHash(s1));
46 CScript scriptSig;
47 scriptSig << OP_0 << Serialize(s1);
48 BOOST_CHECK_EQUAL(p2sh.GetSigOpCount(scriptSig), 3U);
49
50 std::vector<CPubKey> keys;
51 for (int i = 0; i < 3; i++)
52 {
53 CKey k = GenerateRandomKey();
54 keys.push_back(k.GetPubKey());
55 }
56 CScript s2 = GetScriptForMultisig(1, keys);
57 BOOST_CHECK_EQUAL(s2.GetSigOpCount(true), 3U);
58 BOOST_CHECK_EQUAL(s2.GetSigOpCount(false), 20U);
59
60 p2sh = GetScriptForDestination(ScriptHash(s2));
61 BOOST_CHECK_EQUAL(p2sh.GetSigOpCount(true), 0U);
62 BOOST_CHECK_EQUAL(p2sh.GetSigOpCount(false), 0U);
63 CScript scriptSig2;
64 scriptSig2 << OP_1 << ToByteVector(dummy) << ToByteVector(dummy) << Serialize(s2);
65 BOOST_CHECK_EQUAL(p2sh.GetSigOpCount(scriptSig2), 3U);
66 }
67
68 /**
69 * Verifies script execution of the zeroth scriptPubKey of tx output and
70 * zeroth scriptSig and witness of tx input.
71 */
72 static ScriptError VerifyWithFlag(const CTransaction& output, const CMutableTransaction& input, uint32_t flags)
73 {
74 ScriptError error;
75 CTransaction inputi(input);
76 bool ret = VerifyScript(inputi.vin[0].scriptSig, output.vout[0].scriptPubKey, &inputi.vin[0].scriptWitness, flags, TransactionSignatureChecker(&inputi, 0, output.vout[0].nValue, MissingDataBehavior::ASSERT_FAIL), &error);
77 BOOST_CHECK((ret == true) == (error == SCRIPT_ERR_OK));
78
79 return error;
80 }
81
82 /**
83 * Builds a creationTx from scriptPubKey and a spendingTx from scriptSig
84 * and witness such that spendingTx spends output zero of creationTx.
85 * Also inserts creationTx's output into the coins view.
86 */
87 static void BuildTxs(CMutableTransaction& spendingTx, CCoinsViewCache& coins, CMutableTransaction& creationTx, const CScript& scriptPubKey, const CScript& scriptSig, const CScriptWitness& witness)
88 {
89 creationTx.version = 1;
90 creationTx.vin.resize(1);
91 creationTx.vin[0].prevout.SetNull();
92 creationTx.vin[0].scriptSig = CScript();
93 creationTx.vout.resize(1);
94 creationTx.vout[0].nValue = 1;
95 creationTx.vout[0].scriptPubKey = scriptPubKey;
96
97 spendingTx.version = 1;
98 spendingTx.vin.resize(1);
99 spendingTx.vin[0].prevout.hash = creationTx.GetHash();
100 spendingTx.vin[0].prevout.n = 0;
101 spendingTx.vin[0].scriptSig = scriptSig;
102 spendingTx.vin[0].scriptWitness = witness;
103 spendingTx.vout.resize(1);
104 spendingTx.vout[0].nValue = 1;
105 spendingTx.vout[0].scriptPubKey = CScript();
106
107 AddCoins(coins, CTransaction(creationTx), 0);
108 }
109
110 BOOST_AUTO_TEST_CASE(GetTxSigOpCost)
111 {
112 // Transaction creates outputs
113 CMutableTransaction creationTx;
114 // Transaction that spends outputs and whose
115 // sig op cost is going to be tested
116 CMutableTransaction spendingTx;
117
118 // Create utxo set
119 CCoinsView coinsDummy;
120 CCoinsViewCache coins(&coinsDummy);
121 // Create key
122 CKey key = GenerateRandomKey();
123 CPubKey pubkey = key.GetPubKey();
124 // Default flags
125 const uint32_t flags{SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH};
126
127 // Multisig script (legacy counting)
128 {
129 CScript scriptPubKey = CScript() << 1 << ToByteVector(pubkey) << ToByteVector(pubkey) << 2 << OP_CHECKMULTISIGVERIFY;
130 // Do not use a valid signature to avoid using wallet operations.
131 CScript scriptSig = CScript() << OP_0 << OP_0;
132
133 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, CScriptWitness());
134 // Legacy counting only includes signature operations in scriptSigs and scriptPubKeys
135 // of a transaction and does not take the actual executed sig operations into account.
136 // spendingTx in itself does not contain a signature operation.
137 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 0);
138 // creationTx contains two signature operations in its scriptPubKey, but legacy counting
139 // is not accurate.
140 assert(GetTransactionSigOpCost(CTransaction(creationTx), coins, flags) == MAX_PUBKEYS_PER_MULTISIG * WITNESS_SCALE_FACTOR);
141 // Sanity check: script verification fails because of an invalid signature.
142 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_CHECKMULTISIGVERIFY);
143 }
144
145 // Multisig nested in P2SH
146 {
147 CScript redeemScript = CScript() << 1 << ToByteVector(pubkey) << ToByteVector(pubkey) << 2 << OP_CHECKMULTISIGVERIFY;
148 CScript scriptPubKey = GetScriptForDestination(ScriptHash(redeemScript));
149 CScript scriptSig = CScript() << OP_0 << OP_0 << ToByteVector(redeemScript);
150
151 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, CScriptWitness());
152 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 2 * WITNESS_SCALE_FACTOR);
153 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_CHECKMULTISIGVERIFY);
154 }
155
156 // P2WPKH witness program
157 {
158 CScript scriptPubKey = GetScriptForDestination(WitnessV0KeyHash(pubkey));
159 CScript scriptSig = CScript();
160 CScriptWitness scriptWitness;
161 scriptWitness.stack.emplace_back(0);
162 scriptWitness.stack.emplace_back(0);
163
164
165 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
166 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 1);
167 // No signature operations if we don't verify the witness.
168 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags & ~SCRIPT_VERIFY_WITNESS) == 0);
169 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_EQUALVERIFY);
170
171 // The sig op cost for witness version != 0 is zero.
172 assert(scriptPubKey[0] == 0x00);
173 scriptPubKey[0] = 0x51;
174 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
175 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 0);
176 scriptPubKey[0] = 0x00;
177 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
178
179 // The witness of a coinbase transaction is not taken into account.
180 spendingTx.vin[0].prevout.SetNull();
181 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 0);
182 }
183
184 // P2WPKH nested in P2SH
185 {
186 CScript scriptSig = GetScriptForDestination(WitnessV0KeyHash(pubkey));
187 CScript scriptPubKey = GetScriptForDestination(ScriptHash(scriptSig));
188 scriptSig = CScript() << ToByteVector(scriptSig);
189 CScriptWitness scriptWitness;
190 scriptWitness.stack.emplace_back(0);
191 scriptWitness.stack.emplace_back(0);
192
193 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
194 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 1);
195 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_EQUALVERIFY);
196 }
197
198 // P2WSH witness program
199 {
200 CScript witnessScript = CScript() << 1 << ToByteVector(pubkey) << ToByteVector(pubkey) << 2 << OP_CHECKMULTISIGVERIFY;
201 CScript scriptPubKey = GetScriptForDestination(WitnessV0ScriptHash(witnessScript));
202 CScript scriptSig = CScript();
203 CScriptWitness scriptWitness;
204 scriptWitness.stack.emplace_back(0);
205 scriptWitness.stack.emplace_back(0);
206 scriptWitness.stack.emplace_back(witnessScript.begin(), witnessScript.end());
207
208 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
209 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 2);
210 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags & ~SCRIPT_VERIFY_WITNESS) == 0);
211 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_CHECKMULTISIGVERIFY);
212 }
213
214 // P2WSH nested in P2SH
215 {
216 CScript witnessScript = CScript() << 1 << ToByteVector(pubkey) << ToByteVector(pubkey) << 2 << OP_CHECKMULTISIGVERIFY;
217 CScript redeemScript = GetScriptForDestination(WitnessV0ScriptHash(witnessScript));
218 CScript scriptPubKey = GetScriptForDestination(ScriptHash(redeemScript));
219 CScript scriptSig = CScript() << ToByteVector(redeemScript);
220 CScriptWitness scriptWitness;
221 scriptWitness.stack.emplace_back(0);
222 scriptWitness.stack.emplace_back(0);
223 scriptWitness.stack.emplace_back(witnessScript.begin(), witnessScript.end());
224
225 BuildTxs(spendingTx, coins, creationTx, scriptPubKey, scriptSig, scriptWitness);
226 assert(GetTransactionSigOpCost(CTransaction(spendingTx), coins, flags) == 2);
227 assert(VerifyWithFlag(CTransaction(creationTx), spendingTx, flags) == SCRIPT_ERR_CHECKMULTISIGVERIFY);
228 }
229 }
230
231 BOOST_AUTO_TEST_SUITE_END()
232