aboutsummaryrefslogtreecommitdiff
path: root/src/test/script_op_eval_tests.cpp
blob: c44642c6e990f285de066970ccffec91906eee03 (plain)
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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
#include <boost/assert.hpp>
#include <boost/assign/list_of.hpp>
#include <boost/assign/list_inserter.hpp>
#include <boost/assign/std/vector.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/foreach.hpp>

#include "../main.h"
#include "../script.h"
#include "../wallet.h"

using namespace std;

// Test routines internal to script.cpp:
extern uint256 SignatureHash(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
extern bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, int& nSigOps,
                         int nHashType, bool fStrictOpEval);

BOOST_AUTO_TEST_SUITE(script_op_eval_tests)

BOOST_AUTO_TEST_CASE(script_op_eval1)
{
    // OP_EVAL looks like this:
    // scriptSig:    <sig> <sig...> <serialized_script>
    // scriptPubKey: DUP HASH160 <hash> EQUALVERIFY EVAL

    // Test SignSignature() (and therefore the version of Solver() that signs transactions)
    CBasicKeyStore keystore;
    CKey key[4];
    for (int i = 0; i < 4; i++)
    {
        key[i].MakeNewKey();
        keystore.AddKey(key[i]);
    }

    // 8 Scripts: checking all combinations of
    // different keys, straight/EVAL, pubkey/pubkeyhash
    CScript standardScripts[4];
    standardScripts[0] << key[0].GetPubKey() << OP_CHECKSIG;
    standardScripts[1].SetBitcoinAddress(key[1].GetPubKey());
    standardScripts[2] << key[1].GetPubKey() << OP_CHECKSIG;
    standardScripts[3].SetBitcoinAddress(key[2].GetPubKey());
    CScript evalScripts[4];
    uint160 sigScriptHashes[4];
    for (int i = 0; i < 4; i++)
    {
        sigScriptHashes[i] = Hash160(standardScripts[i]);
        keystore.AddCScript(sigScriptHashes[i], standardScripts[i]);
        evalScripts[i] << OP_DUP << OP_HASH160 << sigScriptHashes[i] << OP_EQUALVERIFY << OP_EVAL;
    }

    CTransaction txFrom;  // Funding transaction:
    txFrom.vout.resize(8);
    for (int i = 0; i < 4; i++)
    {
        txFrom.vout[i].scriptPubKey = evalScripts[i];
        txFrom.vout[i+4].scriptPubKey = standardScripts[i];
    }
    BOOST_CHECK(txFrom.IsStandard());

    CTransaction txTo[8]; // Spending transactions
    for (int i = 0; i < 8; i++)
    {
        txTo[i].vin.resize(1);
        txTo[i].vout.resize(1);
        txTo[i].vin[0].prevout.n = i;
        txTo[i].vin[0].prevout.hash = txFrom.GetHash();
        txTo[i].vout[0].nValue = 1;
        BOOST_CHECK_MESSAGE(IsMine(keystore, txFrom.vout[i].scriptPubKey), strprintf("IsMine %d", i));
    }
    for (int i = 0; i < 8; i++)
    {
        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
    }
    // All of the above should be OK, and the txTos have valid signatures
    // Check to make sure signature verification fails if we use the wrong ScriptSig:
    for (int i = 0; i < 8; i++)
        for (int j = 0; j < 8; j++)
        {
            CScript sigSave = txTo[i].vin[0].scriptSig;
            txTo[i].vin[0].scriptSig = txTo[j].vin[0].scriptSig;
            int nUnused = 0;
            bool sigOK = VerifySignature(txFrom, txTo[i], 0, nUnused);
            if (i == j)
                BOOST_CHECK_MESSAGE(sigOK, strprintf("VerifySignature %d %d", i, j));
            else
                BOOST_CHECK_MESSAGE(!sigOK, strprintf("VerifySignature %d %d", i, j));
            txTo[i].vin[0].scriptSig = sigSave;
        }
}

BOOST_AUTO_TEST_CASE(script_op_eval2)
{
    // Test OP_EVAL edge cases

    CScript recurse;
    recurse << OP_DUP << OP_EVAL;

    uint160 recurseHash = Hash160(recurse);

    CScript fund;
    fund << OP_DUP << OP_HASH160 << recurseHash << OP_EQUALVERIFY << OP_EVAL;

    CTransaction txFrom;  // Funding transaction:
    txFrom.vout.resize(1);
    txFrom.vout[0].scriptPubKey = fund;

    BOOST_CHECK(txFrom.IsStandard()); // Looks like a standard transaction until you try to spend it

    CTransaction txTo;
    txTo.vin.resize(1);
    txTo.vout.resize(1);
    txTo.vin[0].prevout.n = 0;
    txTo.vin[0].prevout.hash = txFrom.GetHash();
    txTo.vin[0].scriptSig = CScript() << static_cast<std::vector<unsigned char> >(recurse);
    txTo.vout[0].nValue = 1;

    int nUnused = 0;
    BOOST_CHECK(!VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0, true));
    BOOST_CHECK(!VerifySignature(txFrom, txTo, 0, nUnused, true));
}

BOOST_AUTO_TEST_CASE(script_op_eval3)
{
    // Test the CScript::Set* methods
    CBasicKeyStore keystore;
    CKey key[4];
    std::vector<CKey> keys;
    for (int i = 0; i < 4; i++)
    {
        key[i].MakeNewKey();
        keystore.AddKey(key[i]);
        keys.push_back(key[i]);
    }

    CScript inner[4];
    inner[0].SetBitcoinAddress(key[0].GetPubKey());
    inner[1].SetMultisig(2, std::vector<CKey>(keys.begin(), keys.begin()+2));
    inner[2].SetMultisig(1, std::vector<CKey>(keys.begin(), keys.begin()+2));
    inner[3].SetMultisig(2, std::vector<CKey>(keys.begin(), keys.begin()+3));

    CScript outer[4];
    for (int i = 0; i < 4; i++)
    {
        outer[i].SetEval(inner[i]);
        keystore.AddCScript(Hash160(inner[i]), inner[i]);
    }

    CTransaction txFrom;  // Funding transaction:
    txFrom.vout.resize(4);
    for (int i = 0; i < 4; i++)
    {
        txFrom.vout[i].scriptPubKey = outer[i];
    }
    BOOST_CHECK(txFrom.IsStandard());

    CTransaction txTo[4]; // Spending transactions
    for (int i = 0; i < 4; i++)
    {
        txTo[i].vin.resize(1);
        txTo[i].vout.resize(1);
        txTo[i].vin[0].prevout.n = i;
        txTo[i].vin[0].prevout.hash = txFrom.GetHash();
        txTo[i].vout[0].nValue = 1;
        txTo[i].vout[0].scriptPubKey = inner[i];
        BOOST_CHECK_MESSAGE(IsMine(keystore, txFrom.vout[i].scriptPubKey), strprintf("IsMine %d", i));
    }
    for (int i = 0; i < 4; i++)
    {
        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
        BOOST_CHECK_MESSAGE(txTo[i].IsStandard(), strprintf("txTo[%d].IsStandard", i));
    }
}

BOOST_AUTO_TEST_CASE(script_op_eval_backcompat1)
{
    // Check backwards-incompatibility-testing code
    CScript returnsEleven;
    returnsEleven << OP_11;

    // This should validate on new clients, but will
    // be invalid on old clients (that interpret OP_EVAL as a no-op)
    //  ... except there's a special rule that makes new clients reject
    // it.
    CScript fund;
    fund << OP_EVAL << OP_11 << OP_EQUAL;

    CTransaction txFrom;  // Funding transaction:
    txFrom.vout.resize(1);
    txFrom.vout[0].scriptPubKey = fund;

    CTransaction txTo;
    txTo.vin.resize(1);
    txTo.vout.resize(1);
    txTo.vin[0].prevout.n = 0;
    txTo.vin[0].prevout.hash = txFrom.GetHash();
    txTo.vin[0].scriptSig = CScript() << static_cast<std::vector<unsigned char> >(returnsEleven);
    txTo.vout[0].nValue = 1;

    int nUnused = 0;
    BOOST_CHECK(!VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0, true));
    BOOST_CHECK(!VerifySignature(txFrom, txTo, 0, nUnused, true));
}

BOOST_AUTO_TEST_CASE(script_op_eval_switchover)
{
    // Test OP_EVAL switchover code
    CScript notValid;
    notValid << OP_11 << OP_12 << OP_EQUALVERIFY;

    // This will be valid under old rules, invalid under new:
    CScript fund;
    fund << OP_EVAL;

    CTransaction txFrom;  // Funding transaction:
    txFrom.vout.resize(1);
    txFrom.vout[0].scriptPubKey = fund;

    CTransaction txTo;
    txTo.vin.resize(1);
    txTo.vout.resize(1);
    txTo.vin[0].prevout.n = 0;
    txTo.vin[0].prevout.hash = txFrom.GetHash();
    txTo.vin[0].scriptSig = CScript() << static_cast<std::vector<unsigned char> >(notValid);
    txTo.vout[0].nValue = 1;

    int nUnused = 0;
    BOOST_CHECK(VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0, false));

    // Under strict op_eval switchover, it should be considered invalid:
    BOOST_CHECK(!VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0, true));
}

BOOST_AUTO_TEST_SUITE_END()