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#include <vector>
#include <boost/test/unit_test.hpp>
#include <boost/foreach.hpp>
#include "main.h"
#include "wallet.h"
using namespace std;
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_tests)
BOOST_AUTO_TEST_CASE(script_PushData)
{
// Check that PUSHDATA1, PUSHDATA2, and PUSHDATA4 create the same value on
// the stack as the 1-75 opcodes do.
static const unsigned char direct[] = { 1, 0x5a };
static const unsigned char pushdata1[] = { OP_PUSHDATA1, 1, 0x5a };
static const unsigned char pushdata2[] = { OP_PUSHDATA2, 1, 0, 0x5a };
static const unsigned char pushdata4[] = { OP_PUSHDATA4, 1, 0, 0, 0, 0x5a };
int nUnused = 0;
vector<vector<unsigned char> > directStack;
BOOST_CHECK(EvalScript(directStack, CScript(&direct[0], &direct[sizeof(direct)]), CTransaction(), 0, 0, true, nUnused));
vector<vector<unsigned char> > pushdata1Stack;
BOOST_CHECK(EvalScript(pushdata1Stack, CScript(&pushdata1[0], &pushdata1[sizeof(pushdata1)]), CTransaction(), 0, 0, true, nUnused));
BOOST_CHECK(pushdata1Stack == directStack);
vector<vector<unsigned char> > pushdata2Stack;
BOOST_CHECK(EvalScript(pushdata2Stack, CScript(&pushdata2[0], &pushdata2[sizeof(pushdata2)]), CTransaction(), 0, 0, true, nUnused));
BOOST_CHECK(pushdata2Stack == directStack);
vector<vector<unsigned char> > pushdata4Stack;
BOOST_CHECK(EvalScript(pushdata4Stack, CScript(&pushdata4[0], &pushdata4[sizeof(pushdata4)]), CTransaction(), 0, 0, true, nUnused));
BOOST_CHECK(pushdata4Stack == directStack);
}
CScript
sign_multisig(CScript scriptPubKey, std::vector<CKey> keys, CTransaction transaction)
{
uint256 hash = SignatureHash(scriptPubKey, transaction, 0, SIGHASH_ALL);
CScript result;
//
// NOTE: CHECKMULTISIG has an unfortunate bug; it requires
// one extra item on the stack, before the signatures.
// Putting OP_0 on the stack is the workaround;
// fixing the bug would mean splitting the blockchain (old
// clients would not accept new CHECKMULTISIG transactions,
// and vice-versa)
//
result << OP_0;
BOOST_FOREACH(CKey key, keys)
{
vector<unsigned char> vchSig;
BOOST_CHECK(key.Sign(hash, vchSig));
vchSig.push_back((unsigned char)SIGHASH_ALL);
result << vchSig;
}
return result;
}
CScript
sign_multisig(CScript scriptPubKey, CKey key, CTransaction transaction)
{
std::vector<CKey> keys;
keys.push_back(key);
return sign_multisig(scriptPubKey, keys, transaction);
}
BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG12)
{
int nUnused = 0;
CKey key1, key2, key3;
key1.MakeNewKey();
key2.MakeNewKey();
key3.MakeNewKey();
CScript scriptPubKey12;
scriptPubKey12 << OP_1 << key1.GetPubKey() << key2.GetPubKey() << OP_2 << OP_CHECKMULTISIG;
CTransaction txFrom12;
txFrom12.vout.resize(1);
txFrom12.vout[0].scriptPubKey = scriptPubKey12;
CTransaction txTo12;
txTo12.vin.resize(1);
txTo12.vout.resize(1);
txTo12.vin[0].prevout.n = 0;
txTo12.vin[0].prevout.hash = txFrom12.GetHash();
txTo12.vout[0].nValue = 1;
CScript goodsig1 = sign_multisig(scriptPubKey12, key1, txTo12);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, txTo12, 0, nUnused, 0, true));
txTo12.vout[0].nValue = 2;
BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, txTo12, 0, nUnused, 0, true));
CScript goodsig2 = sign_multisig(scriptPubKey12, key2, txTo12);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, txTo12, 0, nUnused, 0, true));
CScript badsig1 = sign_multisig(scriptPubKey12, key3, txTo12);
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, txTo12, 0, nUnused, 0, true));
}
BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
{
int nUnused = 0;
CKey key1, key2, key3, key4;
key1.MakeNewKey();
key2.MakeNewKey();
key3.MakeNewKey();
key4.MakeNewKey();
CScript scriptPubKey23;
scriptPubKey23 << OP_2 << key1.GetPubKey() << key2.GetPubKey() << key3.GetPubKey() << OP_3 << OP_CHECKMULTISIG;
CTransaction txFrom23;
txFrom23.vout.resize(1);
txFrom23.vout[0].scriptPubKey = scriptPubKey23;
CTransaction txTo23;
txTo23.vin.resize(1);
txTo23.vout.resize(1);
txTo23.vin[0].prevout.n = 0;
txTo23.vin[0].prevout.hash = txFrom23.GetHash();
txTo23.vout[0].nValue = 1;
std::vector<CKey> keys;
keys.push_back(key1); keys.push_back(key2);
CScript goodsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key1); keys.push_back(key3);
CScript goodsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key2); keys.push_back(key3);
CScript goodsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key2); keys.push_back(key2); // Can't re-use sig
CScript badsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key2); keys.push_back(key1); // sigs must be in correct order
CScript badsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig2, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key3); keys.push_back(key2); // sigs must be in correct order
CScript badsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig3, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key4); keys.push_back(key2); // sigs must match pubkeys
CScript badsig4 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig4, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear();
keys.push_back(key1); keys.push_back(key4); // sigs must match pubkeys
CScript badsig5 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig5, scriptPubKey23, txTo23, 0, nUnused, 0, true));
keys.clear(); // Must have signatures
CScript badsig6 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, txTo23, 0, nUnused, 0, true));
}
BOOST_AUTO_TEST_SUITE_END()
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