mirror of
https://github.com/btcsuite/btcd.git
synced 2024-11-19 01:40:07 +01:00
674 lines
18 KiB
Go
674 lines
18 KiB
Go
// Copyright (c) 2013-2017 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package txscript
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import (
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"bytes"
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"reflect"
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"testing"
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"github.com/btcsuite/btcd/wire"
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)
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// TestPushedData ensured the PushedData function extracts the expected data out
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// of various scripts.
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func TestPushedData(t *testing.T) {
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t.Parallel()
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var tests = []struct {
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script string
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out [][]byte
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valid bool
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}{
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{
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"0 IF 0 ELSE 2 ENDIF",
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[][]byte{nil, nil},
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true,
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},
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{
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"16777216 10000000",
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[][]byte{
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{0x00, 0x00, 0x00, 0x01}, // 16777216
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{0x80, 0x96, 0x98, 0x00}, // 10000000
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},
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true,
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},
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{
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"DUP HASH160 '17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem' EQUALVERIFY CHECKSIG",
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[][]byte{
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// 17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem
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{
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0x31, 0x37, 0x56, 0x5a, 0x4e, 0x58, 0x31, 0x53, 0x4e, 0x35,
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0x4e, 0x74, 0x4b, 0x61, 0x38, 0x55, 0x51, 0x46, 0x78, 0x77,
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0x51, 0x62, 0x46, 0x65, 0x46, 0x63, 0x33, 0x69, 0x71, 0x52,
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0x59, 0x68, 0x65, 0x6d,
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},
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},
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true,
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},
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{
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"PUSHDATA4 1000 EQUAL",
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nil,
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false,
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},
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}
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for i, test := range tests {
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script := mustParseShortForm(test.script)
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data, err := PushedData(script)
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if test.valid && err != nil {
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t.Errorf("TestPushedData failed test #%d: %v\n", i, err)
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continue
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} else if !test.valid && err == nil {
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t.Errorf("TestPushedData failed test #%d: test should "+
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"be invalid\n", i)
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continue
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}
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if !reflect.DeepEqual(data, test.out) {
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t.Errorf("TestPushedData failed test #%d: want: %x "+
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"got: %x\n", i, test.out, data)
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}
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}
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}
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// TestHasCanonicalPush ensures the isCanonicalPush function works as expected.
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func TestHasCanonicalPush(t *testing.T) {
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t.Parallel()
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const scriptVersion = 0
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for i := 0; i < 65535; i++ {
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script, err := NewScriptBuilder().AddInt64(int64(i)).Script()
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if err != nil {
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t.Errorf("Script: test #%d unexpected error: %v\n", i, err)
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continue
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}
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if !IsPushOnlyScript(script) {
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t.Errorf("IsPushOnlyScript: test #%d failed: %x\n", i, script)
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continue
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}
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tokenizer := MakeScriptTokenizer(scriptVersion, script)
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for tokenizer.Next() {
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if !isCanonicalPush(tokenizer.Opcode(), tokenizer.Data()) {
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t.Errorf("isCanonicalPush: test #%d failed: %x\n", i, script)
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break
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}
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}
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}
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for i := 0; i <= MaxScriptElementSize; i++ {
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builder := NewScriptBuilder()
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builder.AddData(bytes.Repeat([]byte{0x49}, i))
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script, err := builder.Script()
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if err != nil {
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t.Errorf("Script: test #%d unexpected error: %v\n", i, err)
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continue
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}
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if !IsPushOnlyScript(script) {
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t.Errorf("IsPushOnlyScript: test #%d failed: %x\n", i, script)
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continue
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}
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tokenizer := MakeScriptTokenizer(scriptVersion, script)
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for tokenizer.Next() {
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if !isCanonicalPush(tokenizer.Opcode(), tokenizer.Data()) {
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t.Errorf("isCanonicalPush: test #%d failed: %x\n", i, script)
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break
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}
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}
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}
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}
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// TestGetPreciseSigOps ensures the more precise signature operation counting
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// mechanism which includes signatures in P2SH scripts works as expected.
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func TestGetPreciseSigOps(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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scriptSig []byte
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nSigOps int
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}{
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{
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name: "scriptSig doesn't parse",
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scriptSig: mustParseShortForm("PUSHDATA1 0x02"),
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},
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{
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name: "scriptSig isn't push only",
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scriptSig: mustParseShortForm("1 DUP"),
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nSigOps: 0,
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},
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{
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name: "scriptSig length 0",
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scriptSig: nil,
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nSigOps: 0,
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},
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{
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name: "No script at the end",
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// No script at end but still push only.
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scriptSig: mustParseShortForm("1 1"),
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nSigOps: 0,
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},
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{
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name: "pushed script doesn't parse",
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scriptSig: mustParseShortForm("DATA_2 PUSHDATA1 0x02"),
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},
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}
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// The signature in the p2sh script is nonsensical for the tests since
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// this script will never be executed. What matters is that it matches
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// the right pattern.
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pkScript := mustParseShortForm("HASH160 DATA_20 0x433ec2ac1ffa1b7b7d0" +
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"27f564529c57197f9ae88 EQUAL")
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for _, test := range tests {
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count := GetPreciseSigOpCount(test.scriptSig, pkScript, true)
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if count != test.nSigOps {
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t.Errorf("%s: expected count of %d, got %d", test.name,
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test.nSigOps, count)
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}
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}
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}
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// TestGetWitnessSigOpCount tests that the sig op counting for p2wkh, p2wsh,
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// nested p2sh, and invalid variants are counted properly.
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func TestGetWitnessSigOpCount(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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sigScript []byte
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pkScript []byte
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witness wire.TxWitness
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numSigOps int
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}{
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// A regular p2wkh witness program. The output being spent
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// should only have a single sig-op counted.
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{
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name: "p2wkh",
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pkScript: mustParseShortForm("OP_0 DATA_20 " +
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"0x365ab47888e150ff46f8d51bce36dcd680f1283f"),
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witness: wire.TxWitness{
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hexToBytes("3045022100ee9fe8f9487afa977" +
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"6647ebcf0883ce0cd37454d7ce19889d34ba2c9" +
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"9ce5a9f402200341cb469d0efd3955acb9e46" +
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"f568d7e2cc10f9084aaff94ced6dc50a59134ad01"),
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hexToBytes("03f0000d0639a22bfaf217e4c9428" +
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"9c2b0cc7fa1036f7fd5d9f61a9d6ec153100e"),
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},
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numSigOps: 1,
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},
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// A p2wkh witness program nested within a p2sh output script.
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// The pattern should be recognized properly and attribute only
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// a single sig op.
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{
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name: "nested p2sh",
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sigScript: hexToBytes("160014ad0ffa2e387f07" +
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"e7ead14dc56d5a97dbd6ff5a23"),
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pkScript: mustParseShortForm("HASH160 DATA_20 " +
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"0xb3a84b564602a9d68b4c9f19c2ea61458ff7826c EQUAL"),
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witness: wire.TxWitness{
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hexToBytes("3045022100cb1c2ac1ff1d57d" +
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"db98f7bdead905f8bf5bcc8641b029ce8eef25" +
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"c75a9e22a4702203be621b5c86b771288706be5" +
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"a7eee1db4fceabf9afb7583c1cc6ee3f8297b21201"),
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hexToBytes("03f0000d0639a22bfaf217e4c9" +
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"4289c2b0cc7fa1036f7fd5d9f61a9d6ec153100e"),
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},
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numSigOps: 1,
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},
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// A p2sh script that spends a 2-of-2 multi-sig output.
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{
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name: "p2wsh multi-sig spend",
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numSigOps: 2,
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pkScript: hexToBytes("0020e112b88a0cd87ba387f" +
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"449d443ee2596eb353beb1f0351ab2cba8909d875db23"),
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witness: wire.TxWitness{
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hexToBytes("522103b05faca7ceda92b493" +
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"3f7acdf874a93de0dc7edc461832031cd69cbb1d1e" +
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"6fae2102e39092e031c1621c902e3704424e8d8" +
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"3ca481d4d4eeae1b7970f51c78231207e52ae"),
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},
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},
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// A p2wsh witness program. However, the witness script fails
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// to parse after the valid portion of the script. As a result,
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// the valid portion of the script should still be counted.
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{
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name: "witness script doesn't parse",
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numSigOps: 1,
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pkScript: hexToBytes("0020e112b88a0cd87ba387f44" +
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"9d443ee2596eb353beb1f0351ab2cba8909d875db23"),
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witness: wire.TxWitness{
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mustParseShortForm("DUP HASH160 " +
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"'17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem'" +
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" EQUALVERIFY CHECKSIG DATA_20 0x91"),
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},
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},
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}
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for _, test := range tests {
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count := GetWitnessSigOpCount(test.sigScript, test.pkScript,
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test.witness)
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if count != test.numSigOps {
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t.Errorf("%s: expected count of %d, got %d", test.name,
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test.numSigOps, count)
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}
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}
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}
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// TestRemoveOpcodes ensures that removing opcodes from scripts behaves as
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// expected.
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func TestRemoveOpcodes(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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before string
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remove byte
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err error
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after string
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}{
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{
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// Nothing to remove.
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name: "nothing to remove",
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before: "NOP",
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remove: OP_CODESEPARATOR,
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after: "NOP",
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},
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{
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// Test basic opcode removal.
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name: "codeseparator 1",
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before: "NOP CODESEPARATOR TRUE",
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remove: OP_CODESEPARATOR,
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after: "NOP TRUE",
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},
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{
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// The opcode in question is actually part of the data
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// in a previous opcode.
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name: "codeseparator by coincidence",
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before: "NOP DATA_1 CODESEPARATOR TRUE",
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remove: OP_CODESEPARATOR,
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after: "NOP DATA_1 CODESEPARATOR TRUE",
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},
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{
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name: "invalid opcode",
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before: "CAT",
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remove: OP_CODESEPARATOR,
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after: "CAT",
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},
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{
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name: "invalid length (instruction)",
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before: "PUSHDATA1",
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remove: OP_CODESEPARATOR,
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err: scriptError(ErrMalformedPush, ""),
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},
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{
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name: "invalid length (data)",
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before: "PUSHDATA1 0xff 0xfe",
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remove: OP_CODESEPARATOR,
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err: scriptError(ErrMalformedPush, ""),
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},
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}
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// tstRemoveOpcode is a convenience function to parse the provided
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// raw script, remove the passed opcode, then unparse the result back
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// into a raw script.
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const scriptVersion = 0
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tstRemoveOpcode := func(script []byte, opcode byte) ([]byte, error) {
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if err := checkScriptParses(scriptVersion, script); err != nil {
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return nil, err
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}
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return removeOpcodeRaw(script, opcode), nil
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}
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for _, test := range tests {
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before := mustParseShortForm(test.before)
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after := mustParseShortForm(test.after)
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result, err := tstRemoveOpcode(before, test.remove)
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if e := tstCheckScriptError(err, test.err); e != nil {
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t.Errorf("%s: %v", test.name, e)
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continue
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}
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if !bytes.Equal(after, result) {
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t.Errorf("%s: value does not equal expected: exp: %q"+
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" got: %q", test.name, after, result)
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}
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}
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}
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// TestRemoveOpcodeByData ensures that removing data carrying opcodes based on
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// the data they contain works as expected.
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func TestRemoveOpcodeByData(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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before []byte
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remove []byte
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err error
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after []byte
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}{
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{
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name: "nothing to do",
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before: []byte{OP_NOP},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_NOP},
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},
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{
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name: "",
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before: []byte{OP_NOP, OP_DATA_8, 1, 2, 3, 4, 5, 6, 7, 8, OP_DATA_4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_NOP, OP_DATA_8, 1, 2, 3, 4, 5, 6, 7, 8},
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},
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{
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name: "simple case",
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before: []byte{OP_DATA_4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: nil,
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},
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{
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name: "simple case (miss)",
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before: []byte{OP_DATA_4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 5},
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after: []byte{OP_DATA_4, 1, 2, 3, 4},
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},
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{
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// padded to keep it canonical.
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name: "simple case (pushdata1)",
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before: append(append([]byte{OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: append(append([]byte{OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata1 miss)",
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before: append(append([]byte{OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 5},
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after: append(append([]byte{OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata1 miss noncanonical)",
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before: []byte{OP_PUSHDATA1, 4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_PUSHDATA1, 4, 1, 2, 3, 4},
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},
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{
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name: "simple case (pushdata2)",
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before: append(append([]byte{OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: append(append([]byte{OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata2 miss)",
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before: append(append([]byte{OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4, 5},
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after: append(append([]byte{OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata2 miss noncanonical)",
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before: []byte{OP_PUSHDATA2, 4, 0, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_PUSHDATA2, 4, 0, 1, 2, 3, 4},
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},
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{
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// This is padded to make the push canonical.
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name: "simple case (pushdata4)",
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before: append(append([]byte{OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: append(append([]byte{OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata4 miss noncanonical)",
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before: []byte{OP_PUSHDATA4, 4, 0, 0, 0, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_PUSHDATA4, 4, 0, 0, 0, 1, 2, 3, 4},
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},
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{
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// This is padded to make the push canonical.
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name: "simple case (pushdata4 miss)",
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before: append(append([]byte{OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...), []byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4, 5},
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after: append(append([]byte{OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...), []byte{1, 2, 3, 4}...),
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},
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{
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name: "invalid opcode ",
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before: []byte{OP_UNKNOWN187},
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remove: []byte{1, 2, 3, 4},
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after: []byte{OP_UNKNOWN187},
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},
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{
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name: "invalid length (instruction)",
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before: []byte{OP_PUSHDATA1},
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remove: []byte{1, 2, 3, 4},
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err: scriptError(ErrMalformedPush, ""),
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},
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{
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name: "invalid length (data)",
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before: []byte{OP_PUSHDATA1, 255, 254},
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remove: []byte{1, 2, 3, 4},
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err: scriptError(ErrMalformedPush, ""),
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},
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}
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|
|
|
// tstRemoveOpcodeByData is a convenience function to ensure the provided
|
|
// script parses before attempting to remove the passed data.
|
|
const scriptVersion = 0
|
|
tstRemoveOpcodeByData := func(script []byte, data []byte) ([]byte, bool, error) {
|
|
if err := checkScriptParses(scriptVersion, script); err != nil {
|
|
return nil, false, err
|
|
}
|
|
|
|
result, match := removeOpcodeByData(script, data)
|
|
return result, match, nil
|
|
}
|
|
|
|
for _, test := range tests {
|
|
result, _, err := tstRemoveOpcodeByData(test.before, test.remove)
|
|
if e := tstCheckScriptError(err, test.err); e != nil {
|
|
t.Errorf("%s: %v", test.name, e)
|
|
continue
|
|
}
|
|
|
|
if !bytes.Equal(test.after, result) {
|
|
t.Errorf("%s: value does not equal expected: exp: %q"+
|
|
" got: %q", test.name, test.after, result)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestIsPayToScriptHash ensures the IsPayToScriptHash function returns the
|
|
// expected results for all the scripts in scriptClassTests.
|
|
func TestIsPayToScriptHash(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, test := range scriptClassTests {
|
|
script := mustParseShortForm(test.script)
|
|
shouldBe := (test.class == ScriptHashTy)
|
|
p2sh := IsPayToScriptHash(script)
|
|
if p2sh != shouldBe {
|
|
t.Errorf("%s: expected p2sh %v, got %v", test.name,
|
|
shouldBe, p2sh)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestIsPayToWitnessScriptHash ensures the IsPayToWitnessScriptHash function
|
|
// returns the expected results for all the scripts in scriptClassTests.
|
|
func TestIsPayToWitnessScriptHash(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, test := range scriptClassTests {
|
|
script := mustParseShortForm(test.script)
|
|
shouldBe := (test.class == WitnessV0ScriptHashTy)
|
|
p2wsh := IsPayToWitnessScriptHash(script)
|
|
if p2wsh != shouldBe {
|
|
t.Errorf("%s: expected p2wsh %v, got %v", test.name,
|
|
shouldBe, p2wsh)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestIsPayToWitnessPubKeyHash ensures the IsPayToWitnessPubKeyHash function
|
|
// returns the expected results for all the scripts in scriptClassTests.
|
|
func TestIsPayToWitnessPubKeyHash(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, test := range scriptClassTests {
|
|
script := mustParseShortForm(test.script)
|
|
shouldBe := (test.class == WitnessV0PubKeyHashTy)
|
|
p2wkh := IsPayToWitnessPubKeyHash(script)
|
|
if p2wkh != shouldBe {
|
|
t.Errorf("%s: expected p2wkh %v, got %v", test.name,
|
|
shouldBe, p2wkh)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestHasCanonicalPushes ensures the isCanonicalPush function properly
|
|
// determines what is considered a canonical push for the purposes of
|
|
// removeOpcodeByData.
|
|
func TestHasCanonicalPushes(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
const scriptVersion = 0
|
|
tests := []struct {
|
|
name string
|
|
script string
|
|
expected bool
|
|
}{
|
|
{
|
|
name: "does not parse",
|
|
script: "0x046708afdb0fe5548271967f1a67130b7105cd6a82" +
|
|
"8e03909a67962e0ea1f61d",
|
|
expected: false,
|
|
},
|
|
{
|
|
name: "non-canonical push",
|
|
script: "PUSHDATA1 0x04 0x01020304",
|
|
expected: false,
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
script := mustParseShortForm(test.script)
|
|
if err := checkScriptParses(scriptVersion, script); err != nil {
|
|
if test.expected {
|
|
t.Errorf("%q: script parse failed: %v", test.name, err)
|
|
}
|
|
continue
|
|
}
|
|
tokenizer := MakeScriptTokenizer(scriptVersion, script)
|
|
for tokenizer.Next() {
|
|
result := isCanonicalPush(tokenizer.Opcode(), tokenizer.Data())
|
|
if result != test.expected {
|
|
t.Errorf("%q: isCanonicalPush wrong result\ngot: %v\nwant: %v",
|
|
test.name, result, test.expected)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestIsPushOnlyScript ensures the IsPushOnlyScript function returns the
|
|
// expected results.
|
|
func TestIsPushOnlyScript(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
test := struct {
|
|
name string
|
|
script []byte
|
|
expected bool
|
|
}{
|
|
name: "does not parse",
|
|
script: mustParseShortForm("0x046708afdb0fe5548271967f1a67130" +
|
|
"b7105cd6a828e03909a67962e0ea1f61d"),
|
|
expected: false,
|
|
}
|
|
|
|
if IsPushOnlyScript(test.script) != test.expected {
|
|
t.Errorf("IsPushOnlyScript (%s) wrong result\ngot: %v\nwant: "+
|
|
"%v", test.name, true, test.expected)
|
|
}
|
|
}
|
|
|
|
// TestIsUnspendable ensures the IsUnspendable function returns the expected
|
|
// results.
|
|
func TestIsUnspendable(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
tests := []struct {
|
|
name string
|
|
pkScript []byte
|
|
expected bool
|
|
}{
|
|
{
|
|
// Unspendable
|
|
pkScript: []byte{0x6a, 0x04, 0x74, 0x65, 0x73, 0x74},
|
|
expected: true,
|
|
},
|
|
{
|
|
// Spendable
|
|
pkScript: []byte{0x76, 0xa9, 0x14, 0x29, 0x95, 0xa0,
|
|
0xfe, 0x68, 0x43, 0xfa, 0x9b, 0x95, 0x45,
|
|
0x97, 0xf0, 0xdc, 0xa7, 0xa4, 0x4d, 0xf6,
|
|
0xfa, 0x0b, 0x5c, 0x88, 0xac},
|
|
expected: false,
|
|
},
|
|
{
|
|
// Spendable
|
|
pkScript: []byte{0xa9, 0x14, 0x82, 0x1d, 0xba, 0x94, 0xbc, 0xfb,
|
|
0xa2, 0x57, 0x36, 0xa3, 0x9e, 0x5d, 0x14, 0x5d, 0x69, 0x75,
|
|
0xba, 0x8c, 0x0b, 0x42, 0x87},
|
|
expected: false,
|
|
},
|
|
{
|
|
// Not Necessarily Unspendable
|
|
pkScript: []byte{},
|
|
expected: false,
|
|
},
|
|
{
|
|
// Spendable
|
|
pkScript: []byte{OP_TRUE},
|
|
expected: false,
|
|
},
|
|
{
|
|
// Unspendable
|
|
pkScript: []byte{OP_RETURN},
|
|
expected: true,
|
|
},
|
|
}
|
|
|
|
for i, test := range tests {
|
|
res := IsUnspendable(test.pkScript)
|
|
if res != test.expected {
|
|
t.Errorf("TestIsUnspendable #%d failed: got %v want %v",
|
|
i, res, test.expected)
|
|
continue
|
|
}
|
|
}
|
|
}
|