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starting with script_interpreter

This commit is contained in:
Manuel Araoz 2014-12-10 18:01:43 -03:00
parent e1f1f4b6f6
commit 7ee9601d8a
5 changed files with 2929 additions and 6 deletions
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7
index.js
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@ -44,6 +44,7 @@ bitcore.PaymentProtocol = require('./lib/paymentprotocol');
bitcore.PrivateKey = require('./lib/privatekey');
bitcore.PublicKey = require('./lib/publickey');
bitcore.Script = require('./lib/script');
bitcore.ScriptInterpreter = require('./lib/script_interpreter');
bitcore.Transaction = require('./lib/transaction');
bitcore.URI = require('./lib/uri');
bitcore.Unit = require('./lib/unit');
@ -55,11 +56,5 @@ bitcore.deps.bs58 = require('bs58');
bitcore.deps.Buffer = Buffer;
bitcore.deps.elliptic = require('elliptic');
//bitcore.scriptexec = require('lib/scriptexec');
//bitcore.tx = require('lib/tx');
//bitcore.txpartial = require('lib/txpartial');
//bitcore.bip70 = require('lib/bip70');
// Internal usage, exposed for testing/advanced tweaking
bitcore._HDKeyCache = require('./lib/hdkeycache');

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lib/script_interpreter.js Normal file
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672
test/data/bitcoind/script_invalid.json Normal file
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test/data/bitcoind/script_valid.json Normal file
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303
test/script_interpreter.js Normal file
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@ -0,0 +1,303 @@
'use strict';
var should = require('chai').should();
var bitcore = require('..');
var ScriptInterpreter = bitcore.ScriptInterpreter;
var Transaction = bitcore.Transaction;
var Script = bitcore.Script;
var BN = bitcore.crypto.BN;
var Sig = bitcore.crypto.Signature;
var BufferReader = bitcore.encoding.BufferReader;
var script_valid = require('./data/bitcoind/script_valid');
var script_invalid = require('./data/bitcoind/script_invalid');
var tx_valid = require('./transaction/tx_valid');
var tx_invalid = require('./transaction/tx_invalid');
describe('ScriptInterpreter', function() {
it('should make a new interp', function() {
var interp = new ScriptInterpreter();
(interp instanceof ScriptInterpreter).should.equal(true);
interp.stack.length.should.equal(0);
interp.altstack.length.should.equal(0);
interp.pc.should.equal(0);
interp.pbegincodehash.should.equal(0);
interp.nOpCount.should.equal(0);
interp.vfExec.length.should.equal(0);
interp.errstr.should.equal('');
interp.flags.should.equal(0);
});
describe('@castToBool', function() {
it('should cast these bufs to bool correctly', function() {
ScriptInterpreter.castToBool(BN(0).toSM({
endian: 'little'
})).should.equal(false);
ScriptInterpreter.castToBool(new Buffer('0080', 'hex')).should.equal(false); //negative 0
ScriptInterpreter.castToBool(BN(1).toSM({
endian: 'little'
})).should.equal(true);
ScriptInterpreter.castToBool(BN(-1).toSM({
endian: 'little'
})).should.equal(true);
var buf = new Buffer('00', 'hex');
var bool = BN().fromSM(buf, {
endian: 'little'
}).cmp(0) !== 0;
ScriptInterpreter.castToBool(buf).should.equal(bool);
});
});
describe('#verify', function() {
it('should verify or unverify these trivial scripts from script_valid.json', function() {
var verified = ScriptInterpreter().verify(Script('OP_1'), Script('OP_1'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('OP_1'), Script('OP_0'), Transaction(), 0);
verified.should.equal(false);
verified = ScriptInterpreter().verify(Script('OP_0'), Script('OP_1'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('OP_CODESEPARATOR'), Script('OP_1'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script(''), Script('OP_DEPTH OP_0 OP_EQUAL'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('OP_1 OP_2'), Script('OP_2 OP_EQUALVERIFY OP_1 OP_EQUAL'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('9 0x000000000000000010'), Script(''), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('OP_1'), Script('OP_15 OP_ADD OP_16 OP_EQUAL'), Transaction(), 0);
verified.should.equal(true);
verified = ScriptInterpreter().verify(Script('OP_0'), Script('OP_IF OP_VER OP_ELSE OP_1 OP_ENDIF'), Transaction(), 0);
verified.should.equal(true);
});
it('should verify this new pay-to-pubkey script', function() {
var keypair = Keypair().fromRandom();
var scriptPubkey = Script().writeBuffer(keypair.pubkey.toDER(true)).writeOp('OP_CHECKSIG');
var hashbuf = new Buffer(32);
hashbuf.fill(0);
var credtx = Transaction();
credtx.addTxin(hashbuf, 0xffffffff, Script('OP_0 OP_0'), 0xffffffff);
credtx.addTxout(BN(0), scriptPubkey);
var idbuf = credtx.hash();
var spendtx = Transaction();
spendtx.addTxin(idbuf, 0, Script(), 0xffffffff);
spendtx.addTxout(BN(0), Script());
var sig = spendtx.sign(keypair, Sig.SIGHASH_ALL, 0, scriptPubkey);
var scriptSig = Script().writeBuffer(sig.toTxFormat());
spendtx.txins[0].setScript(scriptSig);
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, spendtx, 0);
verified.should.equal(true);
});
it('should verify this pay-to-pubkey script from script_valid.json', function() {
var scriptSig = Script().fromBitcoindString('0x47 0x3044022007415aa37ce7eaa6146001ac8bdefca0ddcba0e37c5dc08c4ac99392124ebac802207d382307fd53f65778b07b9c63b6e196edeadf0be719130c5db21ff1e700d67501');
var scriptPubkey = Script().fromBitcoindString('0x41 0x0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 CHECKSIG');
var hashbuf = new Buffer(32);
hashbuf.fill(0);
var credtx = Transaction();
credtx.addTxin(hashbuf, 0xffffffff, Script('OP_0 OP_0'), 0xffffffff);
credtx.addTxout(BN(0), scriptPubkey);
var idbuf = credtx.hash();
var spendtx = Transaction();
spendtx.addTxin(idbuf, 0, scriptSig, 0xffffffff);
spendtx.addTxout(BN(0), Script());
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, spendtx, 0, 0);
verified.should.equal(true);
});
});
describe('vectors', function() {
var getFlags = function getFlags(flagstr) {
var flags = 0;
if (flagstr.indexOf('NONE') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_NONE;
}
if (flagstr.indexOf('P2SH') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_P2SH;
}
if (flagstr.indexOf('STRICTENC') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_STRICTENC;
}
if (flagstr.indexOf('DERSIG') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_DERSIG;
}
if (flagstr.indexOf('LOW_S') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_LOW_S;
}
if (flagstr.indexOf('NULLDUMMY') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_NULLDUMMY;
}
if (flagstr.indexOf('SIGPUSHONLY') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_SIGPUSHONLY;
}
if (flagstr.indexOf('MINIMALDATA') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_MINIMALDATA;
}
if (flagstr.indexOf('DISCOURAGE_UPGRADABLE_NOPS') !== -1) {
flags = flags | ScriptInterpreter.SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS;
}
return flags;
};
var c = 0;
script_valid.forEach(function(vector) {
if (vector.length === 1) {
return;
}
c++;
var descstr = vector[3];
it('should pass script_valid vector ' + c + '(' + descstr + ')', function() {
var scriptSig = Script().fromBitcoindString(vector[0]);
var scriptPubkey = Script().fromBitcoindString(vector[1]);
var flags = getFlags(vector[2]);
var hashbuf = new Buffer(32);
hashbuf.fill(0);
var credtx = Transaction();
credtx.addTxin(hashbuf, 0xffffffff, Script('OP_0 OP_0'), 0xffffffff);
credtx.addTxout(BN(0), scriptPubkey);
var idbuf = credtx.hash();
var spendtx = Transaction();
spendtx.addTxin(idbuf, 0, scriptSig, 0xffffffff);
spendtx.addTxout(BN(0), Script());
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, spendtx, 0, flags);
verified.should.equal(true);
});
});
c = 0;
script_invalid.forEach(function(vector) {
if (vector.length === 1) {
return;
}
c++;
var descstr = vector[3];
it('should pass script_invalid vector ' + c + '(' + descstr + ')', function() {
var scriptSig = Script().fromBitcoindString(vector[0]);
var scriptPubkey = Script().fromBitcoindString(vector[1]);
var flags = getFlags(vector[2]);
var hashbuf = new Buffer(32);
hashbuf.fill(0);
var credtx = Transaction();
credtx.addTxin(hashbuf, 0xffffffff, Script('OP_0 OP_0'), 0xffffffff);
credtx.addTxout(BN(0), scriptPubkey);
var idbuf = credtx.hash();
var spendtx = Transaction();
spendtx.addTxin(idbuf, 0, scriptSig, 0xffffffff);
spendtx.addTxout(BN(0), Script());
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, spendtx, 0, flags);
verified.should.equal(false);
});
});
c = 0;
tx_valid.forEach(function(vector) {
if (vector.length === 1) {
return;
}
c++;
it('should pass tx_valid vector ' + c, function() {
var inputs = vector[0];
var txhex = vector[1];
var flags = getFlags(vector[2]);
var map = {};
inputs.forEach(function(input) {
var txoutnum = input[1];
if (txoutnum === -1) {
txoutnum = 0xffffffff; //bitcoind casts -1 to an unsigned int
}
map[input[0] + ':' + txoutnum] = Script().fromBitcoindString(input[2]);
});
var tx = Transaction().fromBuffer(new Buffer(txhex, 'hex'));
tx.txins.forEach(function(txin, j) {
var scriptSig = txin.script;
var txidhex = BufR(txin.txidbuf).readReverse().toString('hex');
var txoutnum = txin.txoutnum;
var scriptPubkey = map[txidhex + ':' + txoutnum];
should.exist(scriptPubkey);
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, tx, j, flags);
verified.should.equal(true);
});
});
});
c = 0;
tx_invalid.forEach(function(vector) {
if (vector.length === 1) {
return;
}
c++;
// tests intentionally not performed by the script interpreter:
// TODO: check this?
/*
if (c === 7 || // tests if valuebn is negative
c === 8 || // tests if valuebn is greater than MAX_MONEY
c === 10 || // tests if two inputs are equal
c === 11 || // coinbase
c === 12 || // coinbase
c === 13 // null input
) {
return;
}
*/
it('should pass tx_invalid vector ' + c, function() {
var inputs = vector[0];
var txhex = vector[1];
var flags = getFlags(vector[2]);
var map = {};
inputs.forEach(function(input) {
var txoutnum = input[1];
if (txoutnum === -1) {
txoutnum = 0xffffffff; //bitcoind casts -1 to an unsigned int
}
map[input[0] + ':' + txoutnum] = Script().fromBitcoindString(input[2]);
});
var tx = Transaction().fromBuffer(new Buffer(txhex, 'hex'));
if (tx.txins.length > 0) {
tx.txins.some(function(txin, j) {
var scriptSig = txin.script;
var txidhex = BufR(txin.txidbuf).readReverse().toString('hex');
var txoutnum = txin.txoutnum;
var scriptPubkey = map[txidhex + ':' + txoutnum];
should.exist(scriptPubkey);
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, tx, j, flags);
return verified === false;
}).should.equal(true);
}
});
});
});
});