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// Copyright (c) 2011-2013 The Bitcoin Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "data/script_invalid.json.h"
#include "data/script_valid.json.h"
#include "core_io.h"
#include "key.h"
#include "keystore.h"
#include "main.h"
#include "script/script.h"
#include "script/sign.h"
#include "util.h"
#include <fstream>
#include <stdint.h>
#include <string>
#include <vector>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/foreach.hpp>
#include <boost/test/unit_test.hpp>
#include "json/json_spirit_reader_template.h"
#include "json/json_spirit_utils.h"
#include "json/json_spirit_writer_template.h"
using namespace std;
using namespace json_spirit;
using namespace boost::algorithm;
// Uncomment if you want to output updated JSON tests.
// #define UPDATE_JSON_TESTS
static const unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC;
unsigned int ParseScriptFlags(string strFlags);
string FormatScriptFlags(unsigned int flags);
Array
read_json(const std::string& jsondata)
{
Value v;
if (!read_string(jsondata, v) || v.type() != array_type)
{
BOOST_ERROR("Parse error.");
return Array();
}
return v.get_array();
}
BOOST_AUTO_TEST_SUITE(script_tests)
CMutableTransaction BuildCreditingTransaction(const CScript& scriptPubKey)
{
CMutableTransaction txCredit;
txCredit.nVersion = 1;
txCredit.nLockTime = 0;
txCredit.vin.resize(1);
txCredit.vout.resize(1);
txCredit.vin[0].prevout.SetNull();
txCredit.vin[0].scriptSig = CScript() << CScriptNum(0) << CScriptNum(0);
txCredit.vin[0].nSequence = std::numeric_limits<unsigned int>::max();
txCredit.vout[0].scriptPubKey = scriptPubKey;
txCredit.vout[0].nValue = 0;
return txCredit;
}
CMutableTransaction BuildSpendingTransaction(const CScript& scriptSig, const CMutableTransaction& txCredit)
{
CMutableTransaction txSpend;
txSpend.nVersion = 1;
txSpend.nLockTime = 0;
txSpend.vin.resize(1);
txSpend.vout.resize(1);
txSpend.vin[0].prevout.hash = txCredit.GetHash();
txSpend.vin[0].prevout.n = 0;
txSpend.vin[0].scriptSig = scriptSig;
txSpend.vin[0].nSequence = std::numeric_limits<unsigned int>::max();
txSpend.vout[0].scriptPubKey = CScript();
txSpend.vout[0].nValue = 0;
return txSpend;
}
void DoTest(const CScript& scriptPubKey, const CScript& scriptSig, int flags, bool expect, const std::string& message)
{
BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, flags, SignatureChecker(BuildSpendingTransaction(scriptSig, BuildCreditingTransaction(scriptPubKey)), 0)) == expect, message);
}
namespace
{
const unsigned char vchKey0[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
const unsigned char vchKey1[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0};
const unsigned char vchKey2[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0};
struct KeyData
{
CKey key0, key0C, key1, key1C, key2, key2C;
CPubKey pubkey0, pubkey0C, pubkey0H;
CPubKey pubkey1, pubkey1C;
CPubKey pubkey2, pubkey2C;
KeyData()
{
key0.Set(vchKey0, vchKey0 + 32, false);
key0C.Set(vchKey0, vchKey0 + 32, true);
pubkey0 = key0.GetPubKey();
pubkey0H = key0.GetPubKey();
pubkey0C = key0C.GetPubKey();
*const_cast<unsigned char*>(&pubkey0H[0]) = 0x06 | (pubkey0H[64] & 1);
key1.Set(vchKey1, vchKey1 + 32, false);
key1C.Set(vchKey1, vchKey1 + 32, true);
pubkey1 = key1.GetPubKey();
pubkey1C = key1C.GetPubKey();
key2.Set(vchKey2, vchKey2 + 32, false);
key2C.Set(vchKey2, vchKey2 + 32, true);
pubkey2 = key2.GetPubKey();
pubkey2C = key2C.GetPubKey();
}
};
const KeyData keys;
class TestBuilder
{
private:
CScript scriptPubKey;
CTransaction creditTx;
CMutableTransaction spendTx;
bool havePush;
std::vector<unsigned char> push;
std::string comment;
int flags;
void DoPush()
{
if (havePush) {
spendTx.vin[0].scriptSig << push;
havePush = false;
}
}
void DoPush(const std::vector<unsigned char>& data)
{
DoPush();
push = data;
havePush = true;
}
public:
TestBuilder(const CScript& redeemScript, const std::string& comment_, int flags_, bool P2SH = false) : scriptPubKey(redeemScript), havePush(false), comment(comment_), flags(flags_)
{
if (P2SH) {
creditTx = BuildCreditingTransaction(CScript() << OP_HASH160 << redeemScript.GetID() << OP_EQUAL);
} else {
creditTx = BuildCreditingTransaction(redeemScript);
}
spendTx = BuildSpendingTransaction(CScript(), creditTx);
}
TestBuilder& Add(const CScript& script)
{
spendTx.vin[0].scriptSig += script;
return *this;
}
TestBuilder& Num(int num)
{
spendTx.vin[0].scriptSig << CScriptNum(num);
return *this;
}
TestBuilder& Push(const std::string& hex)
{
DoPush(ParseHex(hex));
return *this;
}
TestBuilder& PushSig(const CKey& key, int nHashType = SIGHASH_ALL, unsigned int lenR = 32, unsigned int lenS = 32)
{
uint256 hash = SignatureHash(scriptPubKey, spendTx, 0, nHashType);
std::vector<unsigned char> vchSig, r, s;
do {
key.Sign(hash, vchSig, lenS <= 32);
r = std::vector<unsigned char>(vchSig.begin() + 4, vchSig.begin() + 4 + vchSig[3]);
s = std::vector<unsigned char>(vchSig.begin() + 6 + vchSig[3], vchSig.begin() + 6 + vchSig[3] + vchSig[5 + vchSig[3]]);
} while (lenR != r.size() || lenS != s.size());
vchSig.push_back(static_cast<unsigned char>(nHashType));
DoPush(vchSig);
return *this;
}
TestBuilder& Push(const CPubKey& pubkey)
{
DoPush(std::vector<unsigned char>(pubkey.begin(), pubkey.end()));
return *this;
}
TestBuilder& PushRedeem()
{
DoPush(static_cast<std::vector<unsigned char> >(scriptPubKey));
return *this;
}
TestBuilder& EditPush(unsigned int pos, const std::string& hexin, const std::string& hexout)
{
assert(havePush);
std::vector<unsigned char> datain = ParseHex(hexin);
std::vector<unsigned char> dataout = ParseHex(hexout);
assert(pos + datain.size() <= push.size());
BOOST_CHECK_MESSAGE(std::vector<unsigned char>(push.begin() + pos, push.begin() + pos + datain.size()) == datain, comment);
push.erase(push.begin() + pos, push.begin() + pos + datain.size());
push.insert(push.begin() + pos, dataout.begin(), dataout.end());
return *this;
}
TestBuilder& DamagePush(unsigned int pos)
{
assert(havePush);
assert(pos < push.size());
push[pos] ^= 1;
return *this;
}
TestBuilder& Test(bool expect)
{
TestBuilder copy = *this; // Make a copy so we can rollback the push.
DoPush();
DoTest(creditTx.vout[0].scriptPubKey, spendTx.vin[0].scriptSig, flags, expect, comment);
*this = copy;
return *this;
}
Array GetJSON() const
{
Array array;
array.push_back(FormatScript(spendTx.vin[0].scriptSig));
array.push_back(FormatScript(creditTx.vout[0].scriptPubKey));
array.push_back(FormatScriptFlags(flags));
array.push_back(comment);
return array;
}
std::string GetComment()
{
return comment;
}
const CScript& GetScriptPubKey()
{
return creditTx.vout[0].scriptPubKey;
}
};
}
BOOST_AUTO_TEST_CASE(script_build)
{
std::vector<TestBuilder> good;
std::vector<TestBuilder> bad;
good.push_back(TestBuilder(CScript() << keys.pubkey0 << OP_CHECKSIG,
"P2PK", 0
).PushSig(keys.key0));
bad.push_back(TestBuilder(CScript() << keys.pubkey0 << OP_CHECKSIG,
"P2PK, bad sig", 0
).PushSig(keys.key0).DamagePush(10));
good.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << keys.pubkey1C.GetID() << OP_EQUALVERIFY << OP_CHECKSIG,
"P2PKH", 0
).PushSig(keys.key1).Push(keys.pubkey1C));
bad.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << keys.pubkey2C.GetID() << OP_EQUALVERIFY << OP_CHECKSIG,
"P2PKH, bad pubkey", 0
).PushSig(keys.key2).Push(keys.pubkey2C).DamagePush(5));
good.push_back(TestBuilder(CScript() << keys.pubkey1 << OP_CHECKSIG,
"P2PK anyonecanpay", 0
).PushSig(keys.key1, SIGHASH_ALL | SIGHASH_ANYONECANPAY));
bad.push_back(TestBuilder(CScript() << keys.pubkey1 << OP_CHECKSIG,
"P2PK anyonecanpay marked with normal hashtype", 0
).PushSig(keys.key1, SIGHASH_ALL | SIGHASH_ANYONECANPAY).EditPush(70, "81", "01"));
good.push_back(TestBuilder(CScript() << keys.pubkey0C << OP_CHECKSIG,
"P2SH(P2PK)", SCRIPT_VERIFY_P2SH, true
).PushSig(keys.key0).PushRedeem());
bad.push_back(TestBuilder(CScript() << keys.pubkey0C << OP_CHECKSIG,
"P2SH(P2PK), bad redeemscript", SCRIPT_VERIFY_P2SH, true
).PushSig(keys.key0).PushRedeem().DamagePush(10));
good.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << keys.pubkey1.GetID() << OP_EQUALVERIFY << OP_CHECKSIG,
"P2SH(P2PKH), bad sig but no VERIFY_P2SH", 0, true
).PushSig(keys.key0).DamagePush(10).PushRedeem());
bad.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << keys.pubkey1.GetID() << OP_EQUALVERIFY << OP_CHECKSIG,
"P2SH(P2PKH), bad sig", SCRIPT_VERIFY_P2SH, true
).PushSig(keys.key0).DamagePush(10).PushRedeem());
good.push_back(TestBuilder(CScript() << OP_3 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"3-of-3", 0
).Num(0).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2));
bad.push_back(TestBuilder(CScript() << OP_3 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"3-of-3, 2 sigs", 0
).Num(0).PushSig(keys.key0).PushSig(keys.key1).Num(0));
good.push_back(TestBuilder(CScript() << OP_2 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"P2SH(2-of-3)", SCRIPT_VERIFY_P2SH, true
).Num(0).PushSig(keys.key1).PushSig(keys.key2).PushRedeem());
bad.push_back(TestBuilder(CScript() << OP_2 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"P2SH(2-of-3), 1 sig", SCRIPT_VERIFY_P2SH, true
).Num(0).PushSig(keys.key1).Num(0).PushRedeem());
good.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too much R padding but no STRICTENC", 0
).PushSig(keys.key1, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000"));
bad.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too much R padding", SCRIPT_VERIFY_STRICTENC
).PushSig(keys.key1, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000"));
good.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too much S padding but no STRICTENC", 0
).PushSig(keys.key1, SIGHASH_ALL).EditPush(1, "44", "45").EditPush(37, "20", "2100"));
bad.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too much S padding", SCRIPT_VERIFY_STRICTENC
).PushSig(keys.key1, SIGHASH_ALL).EditPush(1, "44", "45").EditPush(37, "20", "2100"));
good.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too little R padding but no STRICTENC", 0
).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220"));
bad.push_back(TestBuilder(CScript() << keys.pubkey1C << OP_CHECKSIG,
"P2PK with too little R padding", SCRIPT_VERIFY_STRICTENC
).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220"));
good.push_back(TestBuilder(CScript() << keys.pubkey2C << OP_CHECKSIG,
"P2PK with high S but no LOW_S", SCRIPT_VERIFY_STRICTENC
).PushSig(keys.key2, SIGHASH_ALL, 32, 33));
good.push_back(TestBuilder(CScript() << keys.pubkey2C << OP_CHECKSIG,
"P2PK with high S but no STRICTENC", SCRIPT_VERIFY_LOW_S
).PushSig(keys.key2, SIGHASH_ALL, 32, 33));
bad.push_back(TestBuilder(CScript() << keys.pubkey2C << OP_CHECKSIG,
"P2PK with high S", SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_STRICTENC
).PushSig(keys.key2, SIGHASH_ALL, 32, 33));
good.push_back(TestBuilder(CScript() << OP_3 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"3-of-3 with nonzero dummy but no NULLDUMMY", 0
).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2));
bad.push_back(TestBuilder(CScript() << OP_3 << keys.pubkey0C << keys.pubkey1C << keys.pubkey2C << OP_3 << OP_CHECKMULTISIG,
"3-of-3 with nonzero dummy", SCRIPT_VERIFY_NULLDUMMY
).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2));
std::map<std::string, Array> tests_good;
std::map<std::string, Array> tests_bad;
{
Array json_good = read_json(std::string(json_tests::script_valid, json_tests::script_valid + sizeof(json_tests::script_valid)));
Array json_bad = read_json(std::string(json_tests::script_invalid, json_tests::script_invalid + sizeof(json_tests::script_invalid)));
BOOST_FOREACH(Value& tv, json_good) {
Array test = tv.get_array();
if (test.size() >= 4) {
tests_good[test[3].get_str()] = test;
}
}
BOOST_FOREACH(Value& tv, json_bad) {
Array test = tv.get_array();
if (test.size() >= 4) {
tests_bad[test[3].get_str()] = test;
}
}
}
std::string strGood;
std::string strBad;
BOOST_FOREACH(TestBuilder& test, good) {
test.Test(true);
if (tests_good.count(test.GetComment()) == 0) {
#ifndef UPDATE_JSON_TESTS
BOOST_CHECK_MESSAGE(false, "Missing auto script_valid test: " + test.GetComment());
#endif
strGood += write_string(Value(test.GetJSON()), true) + ",\n";
} else {
BOOST_CHECK_MESSAGE(ParseScript(tests_good[test.GetComment()][1].get_str()) == test.GetScriptPubKey(), "ScriptPubKey mismatch in auto script_valid test: " + test.GetComment());
strGood += write_string(Value(tests_good[test.GetComment()]), true) + ",\n";
}
}
BOOST_FOREACH(TestBuilder& test, bad) {
test.Test(false);
if (tests_bad.count(test.GetComment()) == 0) {
#ifndef UPDATE_JSON_TESTS
BOOST_CHECK_MESSAGE(false, "Missing auto script_invalid test: " + test.GetComment());
#endif
strBad += write_string(Value(test.GetJSON()), true) + ",\n";
} else {
BOOST_CHECK_MESSAGE(ParseScript(tests_bad[test.GetComment()][1].get_str()) == test.GetScriptPubKey(), "ScriptPubKey mismatch in auto script_invalid test: " + test.GetComment());
strBad += write_string(Value(tests_bad[test.GetComment()]), true) + ",\n";
}
}
#ifdef UPDATE_JSON_TESTS
FILE* valid = fopen("script_valid.json.gen", "w");
fputs(strGood.c_str(), valid);
fclose(valid);
FILE* invalid = fopen("script_invalid.json.gen", "w");
fputs(strBad.c_str(), invalid);
fclose(invalid);
#endif
}
BOOST_AUTO_TEST_CASE(script_valid)
{
// Read tests from test/data/script_valid.json
// Format is an array of arrays
// Inner arrays are [ "scriptSig", "scriptPubKey", "flags" ]
// ... where scriptSig and scriptPubKey are stringified
// scripts.
Array tests = read_json(std::string(json_tests::script_valid, json_tests::script_valid + sizeof(json_tests::script_valid)));
BOOST_FOREACH(Value& tv, tests)
{
Array test = tv.get_array();
string strTest = write_string(tv, false);
if (test.size() < 3) // Allow size > 3; extra stuff ignored (useful for comments)
{
if (test.size() != 1) {
BOOST_ERROR("Bad test: " << strTest);
}
continue;
}
string scriptSigString = test[0].get_str();
CScript scriptSig = ParseScript(scriptSigString);
string scriptPubKeyString = test[1].get_str();
CScript scriptPubKey = ParseScript(scriptPubKeyString);
unsigned int scriptflags = ParseScriptFlags(test[2].get_str());
DoTest(scriptPubKey, scriptSig, scriptflags, true, strTest);
}
}
BOOST_AUTO_TEST_CASE(script_invalid)
{
// Scripts that should evaluate as invalid
Array tests = read_json(std::string(json_tests::script_invalid, json_tests::script_invalid + sizeof(json_tests::script_invalid)));
BOOST_FOREACH(Value& tv, tests)
{
Array test = tv.get_array();
string strTest = write_string(tv, false);
if (test.size() < 3) // Allow size > 3; extra stuff ignored (useful for comments)
{
if (test.size() != 1) {
BOOST_ERROR("Bad test: " << strTest);
}
continue;
}
string scriptSigString = test[0].get_str();
CScript scriptSig = ParseScript(scriptSigString);
string scriptPubKeyString = test[1].get_str();
CScript scriptPubKey = ParseScript(scriptPubKeyString);
unsigned int scriptflags = ParseScriptFlags(test[2].get_str());
DoTest(scriptPubKey, scriptSig, scriptflags, false, strTest);
}
}
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 };
vector<vector<unsigned char> > directStack;
BOOST_CHECK(EvalScript(directStack, CScript(&direct[0], &direct[sizeof(direct)]), true, BaseSignatureChecker()));
vector<vector<unsigned char> > pushdata1Stack;
BOOST_CHECK(EvalScript(pushdata1Stack, CScript(&pushdata1[0], &pushdata1[sizeof(pushdata1)]), true, BaseSignatureChecker()));
BOOST_CHECK(pushdata1Stack == directStack);
vector<vector<unsigned char> > pushdata2Stack;
BOOST_CHECK(EvalScript(pushdata2Stack, CScript(&pushdata2[0], &pushdata2[sizeof(pushdata2)]), true, BaseSignatureChecker()));
BOOST_CHECK(pushdata2Stack == directStack);
vector<vector<unsigned char> > pushdata4Stack;
BOOST_CHECK(EvalScript(pushdata4Stack, CScript(&pushdata4[0], &pushdata4[sizeof(pushdata4)]), true, BaseSignatureChecker()));
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 block chain (old
// clients would not accept new CHECKMULTISIG transactions,
// and vice-versa)
//
result << OP_0;
BOOST_FOREACH(const 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, const CKey &key, CTransaction transaction)
{
std::vector<CKey> keys;
keys.push_back(key);
return sign_multisig(scriptPubKey, keys, transaction);
}
BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG12)
{
CKey key1, key2, key3;
key1.MakeNewKey(true);
key2.MakeNewKey(false);
key3.MakeNewKey(true);
CScript scriptPubKey12;
scriptPubKey12 << OP_1 << key1.GetPubKey() << key2.GetPubKey() << OP_2 << OP_CHECKMULTISIG;
CMutableTransaction txFrom12 = BuildCreditingTransaction(scriptPubKey12);
CMutableTransaction txTo12 = BuildSpendingTransaction(CScript(), txFrom12);
CScript goodsig1 = sign_multisig(scriptPubKey12, key1, txTo12);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, flags, SignatureChecker(txTo12, 0)));
txTo12.vout[0].nValue = 2;
BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, flags, SignatureChecker(txTo12, 0)));
CScript goodsig2 = sign_multisig(scriptPubKey12, key2, txTo12);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, flags, SignatureChecker(txTo12, 0)));
CScript badsig1 = sign_multisig(scriptPubKey12, key3, txTo12);
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, flags, SignatureChecker(txTo12, 0)));
}
BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
{
CKey key1, key2, key3, key4;
key1.MakeNewKey(true);
key2.MakeNewKey(false);
key3.MakeNewKey(true);
key4.MakeNewKey(false);
CScript scriptPubKey23;
scriptPubKey23 << OP_2 << key1.GetPubKey() << key2.GetPubKey() << key3.GetPubKey() << OP_3 << OP_CHECKMULTISIG;
CMutableTransaction txFrom23 = BuildCreditingTransaction(scriptPubKey23);
CMutableTransaction txTo23 = BuildSpendingTransaction(CScript(), txFrom23);
std::vector<CKey> keys;
keys.push_back(key1); keys.push_back(key2);
CScript goodsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, flags, SignatureChecker(txTo23, 0)));
keys.clear();
keys.push_back(key1); keys.push_back(key3);
CScript goodsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, flags, SignatureChecker(txTo23, 0)));
keys.clear();
keys.push_back(key2); keys.push_back(key3);
CScript goodsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, flags, SignatureChecker(txTo23, 0)));
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, flags, SignatureChecker(txTo23, 0)));
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, flags, SignatureChecker(txTo23, 0)));
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, flags, SignatureChecker(txTo23, 0)));
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, flags, SignatureChecker(txTo23, 0)));
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, flags, SignatureChecker(txTo23, 0)));
keys.clear(); // Must have signatures
CScript badsig6 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, flags, SignatureChecker(txTo23, 0)));
}
BOOST_AUTO_TEST_CASE(script_combineSigs)
{
// Test the CombineSignatures function
CBasicKeyStore keystore;
vector<CKey> keys;
vector<CPubKey> pubkeys;
for (int i = 0; i < 3; i++)
{
CKey key;
key.MakeNewKey(i%2 == 1);
keys.push_back(key);
pubkeys.push_back(key.GetPubKey());
keystore.AddKey(key);
}
CMutableTransaction txFrom = BuildCreditingTransaction(GetScriptForDestination(keys[0].GetPubKey().GetID()));
CMutableTransaction txTo = BuildSpendingTransaction(CScript(), txFrom);
CScript& scriptPubKey = txFrom.vout[0].scriptPubKey;
CScript& scriptSig = txTo.vin[0].scriptSig;
CScript empty;
CScript combined = CombineSignatures(scriptPubKey, txTo, 0, empty, empty);
BOOST_CHECK(combined.empty());
// Single signature case:
SignSignature(keystore, txFrom, txTo, 0); // changes scriptSig
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
BOOST_CHECK(combined == scriptSig);
combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
BOOST_CHECK(combined == scriptSig);
CScript scriptSigCopy = scriptSig;
// Signing again will give a different, valid signature:
SignSignature(keystore, txFrom, txTo, 0);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
BOOST_CHECK(combined == scriptSigCopy || combined == scriptSig);
// P2SH, single-signature case:
CScript pkSingle; pkSingle << keys[0].GetPubKey() << OP_CHECKSIG;
keystore.AddCScript(pkSingle);
scriptPubKey = GetScriptForDestination(pkSingle.GetID());
SignSignature(keystore, txFrom, txTo, 0);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
BOOST_CHECK(combined == scriptSig);
combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
BOOST_CHECK(combined == scriptSig);
scriptSigCopy = scriptSig;
SignSignature(keystore, txFrom, txTo, 0);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
BOOST_CHECK(combined == scriptSigCopy || combined == scriptSig);
// dummy scriptSigCopy with placeholder, should always choose non-placeholder:
scriptSigCopy = CScript() << OP_0 << static_cast<vector<unsigned char> >(pkSingle);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
BOOST_CHECK(combined == scriptSig);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, scriptSigCopy);
BOOST_CHECK(combined == scriptSig);
// Hardest case: Multisig 2-of-3
scriptPubKey = GetScriptForMultisig(2, pubkeys);
keystore.AddCScript(scriptPubKey);
SignSignature(keystore, txFrom, txTo, 0);
combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
BOOST_CHECK(combined == scriptSig);
combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
BOOST_CHECK(combined == scriptSig);
// A couple of partially-signed versions:
vector<unsigned char> sig1;
uint256 hash1 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_ALL);
BOOST_CHECK(keys[0].Sign(hash1, sig1));
sig1.push_back(SIGHASH_ALL);
vector<unsigned char> sig2;
uint256 hash2 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_NONE);
BOOST_CHECK(keys[1].Sign(hash2, sig2));
sig2.push_back(SIGHASH_NONE);
vector<unsigned char> sig3;
uint256 hash3 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_SINGLE);
BOOST_CHECK(keys[2].Sign(hash3, sig3));
sig3.push_back(SIGHASH_SINGLE);
// Not fussy about order (or even existence) of placeholders or signatures:
CScript partial1a = CScript() << OP_0 << sig1 << OP_0;
CScript partial1b = CScript() << OP_0 << OP_0 << sig1;
CScript partial2a = CScript() << OP_0 << sig2;
CScript partial2b = CScript() << sig2 << OP_0;
CScript partial3a = CScript() << sig3;
CScript partial3b = CScript() << OP_0 << OP_0 << sig3;
CScript partial3c = CScript() << OP_0 << sig3 << OP_0;
CScript complete12 = CScript() << OP_0 << sig1 << sig2;
CScript complete13 = CScript() << OP_0 << sig1 << sig3;
CScript complete23 = CScript() << OP_0 << sig2 << sig3;
combined = CombineSignatures(scriptPubKey, txTo, 0, partial1a, partial1b);
BOOST_CHECK(combined == partial1a);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial1a, partial2a);
BOOST_CHECK(combined == complete12);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial2a, partial1a);
BOOST_CHECK(combined == complete12);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial1b, partial2b);
BOOST_CHECK(combined == complete12);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial1b);
BOOST_CHECK(combined == complete13);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial2a, partial3a);
BOOST_CHECK(combined == complete23);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial2b);
BOOST_CHECK(combined == complete23);
combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial3a);
BOOST_CHECK(combined == partial3c);
}
BOOST_AUTO_TEST_CASE(script_standard_push)
{
for (int i=0; i<1000; i++) {
CScript script;
script << i;
BOOST_CHECK_MESSAGE(script.IsPushOnly(), "Number " << i << " is not pure push.");
BOOST_CHECK_MESSAGE(script.HasCanonicalPushes(), "Number " << i << " push is not canonical.");
}
for (int i=0; i<1000; i++) {
std::vector<unsigned char> data(i, '\111');
CScript script;
script << data;
BOOST_CHECK_MESSAGE(script.IsPushOnly(), "Length " << i << " is not pure push.");
BOOST_CHECK_MESSAGE(script.HasCanonicalPushes(), "Length " << i << " push is not canonical.");
}
}
BOOST_AUTO_TEST_CASE(script_IsPushOnly_on_invalid_scripts)
{
// IsPushOnly returns false when given a script containing only pushes that
// are invalid due to truncation. IsPushOnly() is consensus critical
// because P2SH evaluation uses it, although this specific behavior should
// not be consensus critical as the P2SH evaluation would fail first due to
// the invalid push. Still, it doesn't hurt to test it explicitly.
static const unsigned char direct[] = { 1 };
BOOST_CHECK(!CScript(direct, direct+sizeof(direct)).IsPushOnly());
}
BOOST_AUTO_TEST_SUITE_END()