216 lines
7 KiB
C++
216 lines
7 KiB
C++
// Copyright (c) 2013-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "consensus/validation.h"
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#include "data/sighash.json.h"
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#include "hash.h"
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#include "validation.h" // For CheckTransaction
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#include "script/interpreter.h"
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#include "script/script.h"
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#include "serialize.h"
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#include "streams.h"
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#include "test/test_bitcoin.h"
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#include "test/test_random.h"
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#include "util.h"
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#include "utilstrencodings.h"
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#include "version.h"
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#include <iostream>
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#include <boost/test/unit_test.hpp>
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#include <univalue.h>
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extern UniValue read_json(const std::string& jsondata);
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// Old script.cpp SignatureHash function
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uint256 static SignatureHashOld(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType)
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{
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static const uint256 one(uint256S("0000000000000000000000000000000000000000000000000000000000000001"));
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if (nIn >= txTo.vin.size())
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{
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printf("ERROR: SignatureHash(): nIn=%d out of range\n", nIn);
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return one;
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}
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CMutableTransaction txTmp(txTo);
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// In case concatenating two scripts ends up with two codeseparators,
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// or an extra one at the end, this prevents all those possible incompatibilities.
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scriptCode.FindAndDelete(CScript(OP_CODESEPARATOR));
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// Blank out other inputs' signatures
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for (unsigned int i = 0; i < txTmp.vin.size(); i++)
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txTmp.vin[i].scriptSig = CScript();
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txTmp.vin[nIn].scriptSig = scriptCode;
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// Blank out some of the outputs
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if ((nHashType & 0x1f) == SIGHASH_NONE)
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{
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// Wildcard payee
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txTmp.vout.clear();
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// Let the others update at will
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for (unsigned int i = 0; i < txTmp.vin.size(); i++)
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if (i != nIn)
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txTmp.vin[i].nSequence = 0;
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}
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else if ((nHashType & 0x1f) == SIGHASH_SINGLE)
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{
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// Only lock-in the txout payee at same index as txin
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unsigned int nOut = nIn;
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if (nOut >= txTmp.vout.size())
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{
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printf("ERROR: SignatureHash(): nOut=%d out of range\n", nOut);
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return one;
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}
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txTmp.vout.resize(nOut+1);
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for (unsigned int i = 0; i < nOut; i++)
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txTmp.vout[i].SetNull();
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// Let the others update at will
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for (unsigned int i = 0; i < txTmp.vin.size(); i++)
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if (i != nIn)
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txTmp.vin[i].nSequence = 0;
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}
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// Blank out other inputs completely, not recommended for open transactions
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if (nHashType & SIGHASH_ANYONECANPAY)
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{
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txTmp.vin[0] = txTmp.vin[nIn];
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txTmp.vin.resize(1);
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}
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// Serialize and hash
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CHashWriter ss(SER_GETHASH, SERIALIZE_TRANSACTION_NO_WITNESS);
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ss << txTmp << nHashType;
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return ss.GetHash();
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}
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void static RandomScript(CScript &script) {
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static const opcodetype oplist[] = {OP_FALSE, OP_1, OP_2, OP_3, OP_CHECKSIG, OP_IF, OP_VERIF, OP_RETURN, OP_CODESEPARATOR};
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script = CScript();
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int ops = (insecure_rand() % 10);
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for (int i=0; i<ops; i++)
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script << oplist[insecure_rand() % (sizeof(oplist)/sizeof(oplist[0]))];
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}
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void static RandomTransaction(CMutableTransaction &tx, bool fSingle) {
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tx.nVersion = insecure_rand();
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tx.vin.clear();
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tx.vout.clear();
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tx.nLockTime = (insecure_rand() % 2) ? insecure_rand() : 0;
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int ins = (insecure_rand() % 4) + 1;
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int outs = fSingle ? ins : (insecure_rand() % 4) + 1;
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for (int in = 0; in < ins; in++) {
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tx.vin.push_back(CTxIn());
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CTxIn &txin = tx.vin.back();
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txin.prevout.hash = GetRandHash();
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txin.prevout.n = insecure_rand() % 4;
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RandomScript(txin.scriptSig);
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txin.nSequence = (insecure_rand() % 2) ? insecure_rand() : (unsigned int)-1;
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}
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for (int out = 0; out < outs; out++) {
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tx.vout.push_back(CTxOut());
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CTxOut &txout = tx.vout.back();
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txout.nValue = insecure_rand() % 100000000;
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RandomScript(txout.scriptPubKey);
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}
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}
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BOOST_FIXTURE_TEST_SUITE(sighash_tests, BasicTestingSetup)
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BOOST_AUTO_TEST_CASE(sighash_test)
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{
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seed_insecure_rand(false);
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#if defined(PRINT_SIGHASH_JSON)
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std::cout << "[\n";
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std::cout << "\t[\"raw_transaction, script, input_index, hashType, signature_hash (result)\"],\n";
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#endif
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int nRandomTests = 50000;
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#if defined(PRINT_SIGHASH_JSON)
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nRandomTests = 500;
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#endif
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for (int i=0; i<nRandomTests; i++) {
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int nHashType = insecure_rand();
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CMutableTransaction txTo;
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RandomTransaction(txTo, (nHashType & 0x1f) == SIGHASH_SINGLE);
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CScript scriptCode;
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RandomScript(scriptCode);
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int nIn = insecure_rand() % txTo.vin.size();
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uint256 sh, sho;
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sho = SignatureHashOld(scriptCode, txTo, nIn, nHashType);
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sh = SignatureHash(scriptCode, txTo, nIn, nHashType, 0, SIGVERSION_BASE);
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#if defined(PRINT_SIGHASH_JSON)
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CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
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ss << txTo;
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std::cout << "\t[\"" ;
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std::cout << HexStr(ss.begin(), ss.end()) << "\", \"";
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std::cout << HexStr(scriptCode) << "\", ";
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std::cout << nIn << ", ";
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std::cout << nHashType << ", \"";
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std::cout << sho.GetHex() << "\"]";
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if (i+1 != nRandomTests) {
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std::cout << ",";
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}
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std::cout << "\n";
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#endif
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BOOST_CHECK(sh == sho);
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}
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#if defined(PRINT_SIGHASH_JSON)
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std::cout << "]\n";
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#endif
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}
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// Goal: check that SignatureHash generates correct hash
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BOOST_AUTO_TEST_CASE(sighash_from_data)
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{
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UniValue tests = read_json(std::string(json_tests::sighash, json_tests::sighash + sizeof(json_tests::sighash)));
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for (unsigned int idx = 0; idx < tests.size(); idx++) {
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UniValue test = tests[idx];
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std::string strTest = test.write();
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if (test.size() < 1) // Allow for extra stuff (useful for comments)
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{
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BOOST_ERROR("Bad test: " << strTest);
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continue;
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}
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if (test.size() == 1) continue; // comment
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std::string raw_tx, raw_script, sigHashHex;
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int nIn, nHashType;
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uint256 sh;
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CTransactionRef tx;
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CScript scriptCode = CScript();
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try {
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// deserialize test data
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raw_tx = test[0].get_str();
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raw_script = test[1].get_str();
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nIn = test[2].get_int();
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nHashType = test[3].get_int();
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sigHashHex = test[4].get_str();
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CDataStream stream(ParseHex(raw_tx), SER_NETWORK, PROTOCOL_VERSION);
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stream >> tx;
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CValidationState state;
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BOOST_CHECK_MESSAGE(CheckTransaction(*tx, state), strTest);
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BOOST_CHECK(state.IsValid());
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std::vector<unsigned char> raw = ParseHex(raw_script);
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scriptCode.insert(scriptCode.end(), raw.begin(), raw.end());
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} catch (...) {
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BOOST_ERROR("Bad test, couldn't deserialize data: " << strTest);
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continue;
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}
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sh = SignatureHash(scriptCode, *tx, nIn, nHashType, 0, SIGVERSION_BASE);
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BOOST_CHECK_MESSAGE(sh.GetHex() == sigHashHex, strTest);
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}
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}
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BOOST_AUTO_TEST_SUITE_END()
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