478 lines
18 KiB
C++
478 lines
18 KiB
C++
// Copyright (c) 2011-2013 The Bitcoin Core developers
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// Distributed under the MIT/X11 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 "script.h"
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#include "data/script_invalid.json.h"
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#include "data/script_valid.json.h"
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#include "key.h"
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#include "keystore.h"
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#include "main.h"
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#include <fstream>
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <boost/algorithm/string/classification.hpp>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/algorithm/string/replace.hpp>
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#include <boost/algorithm/string/split.hpp>
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#include <boost/filesystem/operations.hpp>
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#include <boost/filesystem/path.hpp>
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#include <boost/foreach.hpp>
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#include <boost/test/unit_test.hpp>
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#include "json/json_spirit_reader_template.h"
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#include "json/json_spirit_utils.h"
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#include "json/json_spirit_writer_template.h"
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using namespace std;
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using namespace json_spirit;
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using namespace boost::algorithm;
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extern uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
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static const unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC;
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CScript
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ParseScript(string s)
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{
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CScript result;
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static map<string, opcodetype> mapOpNames;
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if (mapOpNames.size() == 0)
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{
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for (int op = 0; op <= OP_NOP10; op++)
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{
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// Allow OP_RESERVED to get into mapOpNames
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if (op < OP_NOP && op != OP_RESERVED)
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continue;
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const char* name = GetOpName((opcodetype)op);
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if (strcmp(name, "OP_UNKNOWN") == 0)
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continue;
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string strName(name);
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mapOpNames[strName] = (opcodetype)op;
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// Convenience: OP_ADD and just ADD are both recognized:
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replace_first(strName, "OP_", "");
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mapOpNames[strName] = (opcodetype)op;
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}
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}
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vector<string> words;
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split(words, s, is_any_of(" \t\n"), token_compress_on);
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BOOST_FOREACH(string w, words)
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{
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if (w.size() == 0)
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{
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// Empty string, ignore. (boost::split given '' will return one word)
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}
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else if (all(w, is_digit()) ||
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(starts_with(w, "-") && all(string(w.begin()+1, w.end()), is_digit())))
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{
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// Number
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int64_t n = atoi64(w);
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result << n;
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}
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else if (starts_with(w, "0x") && IsHex(string(w.begin()+2, w.end())))
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{
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// Raw hex data, inserted NOT pushed onto stack:
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std::vector<unsigned char> raw = ParseHex(string(w.begin()+2, w.end()));
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result.insert(result.end(), raw.begin(), raw.end());
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}
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else if (w.size() >= 2 && starts_with(w, "'") && ends_with(w, "'"))
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{
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// Single-quoted string, pushed as data. NOTE: this is poor-man's
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// parsing, spaces/tabs/newlines in single-quoted strings won't work.
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std::vector<unsigned char> value(w.begin()+1, w.end()-1);
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result << value;
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}
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else if (mapOpNames.count(w))
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{
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// opcode, e.g. OP_ADD or ADD:
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result << mapOpNames[w];
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}
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else
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{
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BOOST_ERROR("Parse error: " << s);
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return CScript();
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}
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}
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return result;
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}
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Array
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read_json(const std::string& jsondata)
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{
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Value v;
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if (!read_string(jsondata, v) || v.type() != array_type)
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{
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BOOST_ERROR("Parse error.");
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return Array();
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}
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return v.get_array();
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}
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BOOST_AUTO_TEST_SUITE(script_tests)
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BOOST_AUTO_TEST_CASE(script_valid)
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{
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// Read tests from test/data/script_valid.json
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// Format is an array of arrays
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// Inner arrays are [ "scriptSig", "scriptPubKey" ]
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// ... where scriptSig and scriptPubKey are stringified
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// scripts.
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Array tests = read_json(std::string(json_tests::script_valid, json_tests::script_valid + sizeof(json_tests::script_valid)));
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BOOST_FOREACH(Value& tv, tests)
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{
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Array test = tv.get_array();
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string strTest = write_string(tv, false);
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if (test.size() < 2) // Allow size > 2; extra stuff ignored (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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string scriptSigString = test[0].get_str();
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CScript scriptSig = ParseScript(scriptSigString);
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string scriptPubKeyString = test[1].get_str();
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CScript scriptPubKey = ParseScript(scriptPubKeyString);
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int flagsNow = flags;
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if (test.size() > 3 && ("," + test[2].get_str() + ",").find(",DERSIG,") != string::npos) {
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flagsNow |= SCRIPT_VERIFY_DERSIG;
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}
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CTransaction tx;
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BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, tx, 0, flagsNow, SIGHASH_NONE), strTest);
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}
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}
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BOOST_AUTO_TEST_CASE(script_invalid)
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{
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// Scripts that should evaluate as invalid
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Array tests = read_json(std::string(json_tests::script_invalid, json_tests::script_invalid + sizeof(json_tests::script_invalid)));
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BOOST_FOREACH(Value& tv, tests)
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{
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Array test = tv.get_array();
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string strTest = write_string(tv, false);
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if (test.size() < 2) // Allow size > 2; extra stuff ignored (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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string scriptSigString = test[0].get_str();
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CScript scriptSig = ParseScript(scriptSigString);
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string scriptPubKeyString = test[1].get_str();
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CScript scriptPubKey = ParseScript(scriptPubKeyString);
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int flagsNow = flags;
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if (test.size() > 3 && ("," + test[2].get_str() + ",").find(",DERSIG,") != string::npos) {
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flagsNow |= SCRIPT_VERIFY_DERSIG;
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}
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CTransaction tx;
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BOOST_CHECK_MESSAGE(!VerifyScript(scriptSig, scriptPubKey, tx, 0, flagsNow, SIGHASH_NONE), strTest);
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}
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}
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BOOST_AUTO_TEST_CASE(script_PushData)
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{
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// Check that PUSHDATA1, PUSHDATA2, and PUSHDATA4 create the same value on
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// the stack as the 1-75 opcodes do.
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static const unsigned char direct[] = { 1, 0x5a };
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static const unsigned char pushdata1[] = { OP_PUSHDATA1, 1, 0x5a };
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static const unsigned char pushdata2[] = { OP_PUSHDATA2, 1, 0, 0x5a };
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static const unsigned char pushdata4[] = { OP_PUSHDATA4, 1, 0, 0, 0, 0x5a };
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vector<vector<unsigned char> > directStack;
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BOOST_CHECK(EvalScript(directStack, CScript(&direct[0], &direct[sizeof(direct)]), CTransaction(), 0, true, 0));
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vector<vector<unsigned char> > pushdata1Stack;
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BOOST_CHECK(EvalScript(pushdata1Stack, CScript(&pushdata1[0], &pushdata1[sizeof(pushdata1)]), CTransaction(), 0, true, 0));
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BOOST_CHECK(pushdata1Stack == directStack);
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vector<vector<unsigned char> > pushdata2Stack;
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BOOST_CHECK(EvalScript(pushdata2Stack, CScript(&pushdata2[0], &pushdata2[sizeof(pushdata2)]), CTransaction(), 0, true, 0));
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BOOST_CHECK(pushdata2Stack == directStack);
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vector<vector<unsigned char> > pushdata4Stack;
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BOOST_CHECK(EvalScript(pushdata4Stack, CScript(&pushdata4[0], &pushdata4[sizeof(pushdata4)]), CTransaction(), 0, true, 0));
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BOOST_CHECK(pushdata4Stack == directStack);
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}
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CScript
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sign_multisig(CScript scriptPubKey, std::vector<CKey> keys, CTransaction transaction)
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{
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uint256 hash = SignatureHash(scriptPubKey, transaction, 0, SIGHASH_ALL);
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CScript result;
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//
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// NOTE: CHECKMULTISIG has an unfortunate bug; it requires
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// one extra item on the stack, before the signatures.
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// Putting OP_0 on the stack is the workaround;
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// fixing the bug would mean splitting the block chain (old
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// clients would not accept new CHECKMULTISIG transactions,
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// and vice-versa)
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//
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result << OP_0;
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BOOST_FOREACH(const CKey &key, keys)
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{
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vector<unsigned char> vchSig;
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BOOST_CHECK(key.Sign(hash, vchSig));
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vchSig.push_back((unsigned char)SIGHASH_ALL);
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result << vchSig;
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}
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return result;
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}
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CScript
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sign_multisig(CScript scriptPubKey, const CKey &key, CTransaction transaction)
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{
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std::vector<CKey> keys;
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keys.push_back(key);
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return sign_multisig(scriptPubKey, keys, transaction);
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}
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BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG12)
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{
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CKey key1, key2, key3;
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key1.MakeNewKey(true);
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key2.MakeNewKey(false);
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key3.MakeNewKey(true);
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CScript scriptPubKey12;
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scriptPubKey12 << OP_1 << key1.GetPubKey() << key2.GetPubKey() << OP_2 << OP_CHECKMULTISIG;
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CTransaction txFrom12;
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txFrom12.vout.resize(1);
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txFrom12.vout[0].scriptPubKey = scriptPubKey12;
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CTransaction txTo12;
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txTo12.vin.resize(1);
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txTo12.vout.resize(1);
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txTo12.vin[0].prevout.n = 0;
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txTo12.vin[0].prevout.hash = txFrom12.GetHash();
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txTo12.vout[0].nValue = 1;
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CScript goodsig1 = sign_multisig(scriptPubKey12, key1, txTo12);
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BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, txTo12, 0, flags, 0));
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txTo12.vout[0].nValue = 2;
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BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, txTo12, 0, flags, 0));
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CScript goodsig2 = sign_multisig(scriptPubKey12, key2, txTo12);
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BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, txTo12, 0, flags, 0));
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CScript badsig1 = sign_multisig(scriptPubKey12, key3, txTo12);
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BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, txTo12, 0, flags, 0));
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}
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BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
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{
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CKey key1, key2, key3, key4;
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key1.MakeNewKey(true);
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key2.MakeNewKey(false);
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key3.MakeNewKey(true);
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key4.MakeNewKey(false);
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CScript scriptPubKey23;
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scriptPubKey23 << OP_2 << key1.GetPubKey() << key2.GetPubKey() << key3.GetPubKey() << OP_3 << OP_CHECKMULTISIG;
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CTransaction txFrom23;
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txFrom23.vout.resize(1);
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txFrom23.vout[0].scriptPubKey = scriptPubKey23;
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CTransaction txTo23;
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txTo23.vin.resize(1);
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txTo23.vout.resize(1);
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txTo23.vin[0].prevout.n = 0;
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txTo23.vin[0].prevout.hash = txFrom23.GetHash();
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txTo23.vout[0].nValue = 1;
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std::vector<CKey> keys;
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keys.push_back(key1); keys.push_back(key2);
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CScript goodsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key1); keys.push_back(key3);
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CScript goodsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key2); keys.push_back(key3);
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CScript goodsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key2); keys.push_back(key2); // Can't re-use sig
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CScript badsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key2); keys.push_back(key1); // sigs must be in correct order
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CScript badsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig2, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key3); keys.push_back(key2); // sigs must be in correct order
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CScript badsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig3, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key4); keys.push_back(key2); // sigs must match pubkeys
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CScript badsig4 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig4, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear();
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keys.push_back(key1); keys.push_back(key4); // sigs must match pubkeys
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CScript badsig5 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig5, scriptPubKey23, txTo23, 0, flags, 0));
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keys.clear(); // Must have signatures
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CScript badsig6 = sign_multisig(scriptPubKey23, keys, txTo23);
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BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, txTo23, 0, flags, 0));
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}
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BOOST_AUTO_TEST_CASE(script_combineSigs)
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{
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// Test the CombineSignatures function
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CBasicKeyStore keystore;
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vector<CKey> keys;
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vector<CPubKey> pubkeys;
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for (int i = 0; i < 3; i++)
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{
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CKey key;
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key.MakeNewKey(i%2 == 1);
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keys.push_back(key);
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pubkeys.push_back(key.GetPubKey());
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keystore.AddKey(key);
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}
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CTransaction txFrom;
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txFrom.vout.resize(1);
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txFrom.vout[0].scriptPubKey.SetDestination(keys[0].GetPubKey().GetID());
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CScript& scriptPubKey = txFrom.vout[0].scriptPubKey;
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CTransaction txTo;
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txTo.vin.resize(1);
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txTo.vout.resize(1);
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txTo.vin[0].prevout.n = 0;
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txTo.vin[0].prevout.hash = txFrom.GetHash();
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CScript& scriptSig = txTo.vin[0].scriptSig;
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txTo.vout[0].nValue = 1;
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CScript empty;
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CScript combined = CombineSignatures(scriptPubKey, txTo, 0, empty, empty);
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BOOST_CHECK(combined.empty());
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// Single signature case:
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SignSignature(keystore, txFrom, txTo, 0); // changes scriptSig
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
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BOOST_CHECK(combined == scriptSig);
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combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
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BOOST_CHECK(combined == scriptSig);
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CScript scriptSigCopy = scriptSig;
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// Signing again will give a different, valid signature:
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SignSignature(keystore, txFrom, txTo, 0);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
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BOOST_CHECK(combined == scriptSigCopy || combined == scriptSig);
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// P2SH, single-signature case:
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CScript pkSingle; pkSingle << keys[0].GetPubKey() << OP_CHECKSIG;
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keystore.AddCScript(pkSingle);
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scriptPubKey.SetDestination(pkSingle.GetID());
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SignSignature(keystore, txFrom, txTo, 0);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
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BOOST_CHECK(combined == scriptSig);
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combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
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BOOST_CHECK(combined == scriptSig);
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scriptSigCopy = scriptSig;
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SignSignature(keystore, txFrom, txTo, 0);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
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BOOST_CHECK(combined == scriptSigCopy || combined == scriptSig);
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// dummy scriptSigCopy with placeholder, should always choose non-placeholder:
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scriptSigCopy = CScript() << OP_0 << static_cast<vector<unsigned char> >(pkSingle);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
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BOOST_CHECK(combined == scriptSig);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, scriptSigCopy);
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BOOST_CHECK(combined == scriptSig);
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// Hardest case: Multisig 2-of-3
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scriptPubKey.SetMultisig(2, pubkeys);
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keystore.AddCScript(scriptPubKey);
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SignSignature(keystore, txFrom, txTo, 0);
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combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
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BOOST_CHECK(combined == scriptSig);
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combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
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BOOST_CHECK(combined == scriptSig);
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// A couple of partially-signed versions:
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vector<unsigned char> sig1;
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uint256 hash1 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_ALL);
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BOOST_CHECK(keys[0].Sign(hash1, sig1));
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sig1.push_back(SIGHASH_ALL);
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vector<unsigned char> sig2;
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uint256 hash2 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_NONE);
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BOOST_CHECK(keys[1].Sign(hash2, sig2));
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sig2.push_back(SIGHASH_NONE);
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vector<unsigned char> sig3;
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uint256 hash3 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_SINGLE);
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BOOST_CHECK(keys[2].Sign(hash3, sig3));
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sig3.push_back(SIGHASH_SINGLE);
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// Not fussy about order (or even existence) of placeholders or signatures:
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CScript partial1a = CScript() << OP_0 << sig1 << OP_0;
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CScript partial1b = CScript() << OP_0 << OP_0 << sig1;
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CScript partial2a = CScript() << OP_0 << sig2;
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CScript partial2b = CScript() << sig2 << OP_0;
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CScript partial3a = CScript() << sig3;
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CScript partial3b = CScript() << OP_0 << OP_0 << sig3;
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CScript partial3c = CScript() << OP_0 << sig3 << OP_0;
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CScript complete12 = CScript() << OP_0 << sig1 << sig2;
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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_SUITE_END()
|