412 lines
15 KiB
Go
412 lines
15 KiB
Go
// Copyright (c) 2013-2016 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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"testing"
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)
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// TestScriptBuilderAddOp tests that pushing opcodes to a script via the
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// ScriptBuilder API works as expected.
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func TestScriptBuilderAddOp(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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opcodes []byte
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expected []byte
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}{
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{
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name: "push OP_0",
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opcodes: []byte{OP_0},
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expected: []byte{OP_0},
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},
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{
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name: "push OP_1 OP_2",
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opcodes: []byte{OP_1, OP_2},
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expected: []byte{OP_1, OP_2},
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},
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{
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name: "push OP_HASH160 OP_EQUAL",
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opcodes: []byte{OP_HASH160, OP_EQUAL},
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expected: []byte{OP_HASH160, OP_EQUAL},
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},
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}
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// Run tests and individually add each op via AddOp.
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builder := NewScriptBuilder()
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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builder.Reset()
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for _, opcode := range test.opcodes {
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builder.AddOp(opcode)
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}
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result, err := builder.Script()
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if err != nil {
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t.Errorf("ScriptBuilder.AddOp #%d (%s) unexpected "+
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"error: %v", i, test.name, err)
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continue
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}
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if !bytes.Equal(result, test.expected) {
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t.Errorf("ScriptBuilder.AddOp #%d (%s) wrong result\n"+
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"got: %x\nwant: %x", i, test.name, result,
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test.expected)
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continue
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}
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}
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// Run tests and bulk add ops via AddOps.
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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builder.Reset()
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result, err := builder.AddOps(test.opcodes).Script()
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if err != nil {
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t.Errorf("ScriptBuilder.AddOps #%d (%s) unexpected "+
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"error: %v", i, test.name, err)
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continue
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}
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if !bytes.Equal(result, test.expected) {
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t.Errorf("ScriptBuilder.AddOps #%d (%s) wrong result\n"+
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"got: %x\nwant: %x", i, test.name, result,
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test.expected)
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continue
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}
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}
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}
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// TestScriptBuilderAddInt64 tests that pushing signed integers to a script via
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// the ScriptBuilder API works as expected.
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func TestScriptBuilderAddInt64(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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val int64
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expected []byte
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}{
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{name: "push -1", val: -1, expected: []byte{OP_1NEGATE}},
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{name: "push small int 0", val: 0, expected: []byte{OP_0}},
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{name: "push small int 1", val: 1, expected: []byte{OP_1}},
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{name: "push small int 2", val: 2, expected: []byte{OP_2}},
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{name: "push small int 3", val: 3, expected: []byte{OP_3}},
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{name: "push small int 4", val: 4, expected: []byte{OP_4}},
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{name: "push small int 5", val: 5, expected: []byte{OP_5}},
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{name: "push small int 6", val: 6, expected: []byte{OP_6}},
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{name: "push small int 7", val: 7, expected: []byte{OP_7}},
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{name: "push small int 8", val: 8, expected: []byte{OP_8}},
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{name: "push small int 9", val: 9, expected: []byte{OP_9}},
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{name: "push small int 10", val: 10, expected: []byte{OP_10}},
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{name: "push small int 11", val: 11, expected: []byte{OP_11}},
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{name: "push small int 12", val: 12, expected: []byte{OP_12}},
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{name: "push small int 13", val: 13, expected: []byte{OP_13}},
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{name: "push small int 14", val: 14, expected: []byte{OP_14}},
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{name: "push small int 15", val: 15, expected: []byte{OP_15}},
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{name: "push small int 16", val: 16, expected: []byte{OP_16}},
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{name: "push 17", val: 17, expected: []byte{OP_DATA_1, 0x11}},
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{name: "push 65", val: 65, expected: []byte{OP_DATA_1, 0x41}},
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{name: "push 127", val: 127, expected: []byte{OP_DATA_1, 0x7f}},
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{name: "push 128", val: 128, expected: []byte{OP_DATA_2, 0x80, 0}},
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{name: "push 255", val: 255, expected: []byte{OP_DATA_2, 0xff, 0}},
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{name: "push 256", val: 256, expected: []byte{OP_DATA_2, 0, 0x01}},
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{name: "push 32767", val: 32767, expected: []byte{OP_DATA_2, 0xff, 0x7f}},
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{name: "push 32768", val: 32768, expected: []byte{OP_DATA_3, 0, 0x80, 0}},
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{name: "push -2", val: -2, expected: []byte{OP_DATA_1, 0x82}},
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{name: "push -3", val: -3, expected: []byte{OP_DATA_1, 0x83}},
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{name: "push -4", val: -4, expected: []byte{OP_DATA_1, 0x84}},
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{name: "push -5", val: -5, expected: []byte{OP_DATA_1, 0x85}},
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{name: "push -17", val: -17, expected: []byte{OP_DATA_1, 0x91}},
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{name: "push -65", val: -65, expected: []byte{OP_DATA_1, 0xc1}},
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{name: "push -127", val: -127, expected: []byte{OP_DATA_1, 0xff}},
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{name: "push -128", val: -128, expected: []byte{OP_DATA_2, 0x80, 0x80}},
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{name: "push -255", val: -255, expected: []byte{OP_DATA_2, 0xff, 0x80}},
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{name: "push -256", val: -256, expected: []byte{OP_DATA_2, 0x00, 0x81}},
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{name: "push -32767", val: -32767, expected: []byte{OP_DATA_2, 0xff, 0xff}},
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{name: "push -32768", val: -32768, expected: []byte{OP_DATA_3, 0x00, 0x80, 0x80}},
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}
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builder := NewScriptBuilder()
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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builder.Reset().AddInt64(test.val)
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result, err := builder.Script()
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if err != nil {
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t.Errorf("ScriptBuilder.AddInt64 #%d (%s) unexpected "+
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"error: %v", i, test.name, err)
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continue
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}
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if !bytes.Equal(result, test.expected) {
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t.Errorf("ScriptBuilder.AddInt64 #%d (%s) wrong result\n"+
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"got: %x\nwant: %x", i, test.name, result,
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test.expected)
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continue
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}
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}
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}
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// TestScriptBuilderAddData tests that pushing data to a script via the
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// ScriptBuilder API works as expected and conforms to BIP0062.
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func TestScriptBuilderAddData(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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data []byte
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expected []byte
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useFull bool // use AddFullData instead of AddData.
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}{
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// BIP0062: Pushing an empty byte sequence must use OP_0.
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{name: "push empty byte sequence", data: nil, expected: []byte{OP_0}},
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{name: "push 1 byte 0x00", data: []byte{0x00}, expected: []byte{OP_0}},
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// BIP0062: Pushing a 1-byte sequence of byte 0x01 through 0x10 must use OP_n.
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{name: "push 1 byte 0x01", data: []byte{0x01}, expected: []byte{OP_1}},
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{name: "push 1 byte 0x02", data: []byte{0x02}, expected: []byte{OP_2}},
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{name: "push 1 byte 0x03", data: []byte{0x03}, expected: []byte{OP_3}},
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{name: "push 1 byte 0x04", data: []byte{0x04}, expected: []byte{OP_4}},
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{name: "push 1 byte 0x05", data: []byte{0x05}, expected: []byte{OP_5}},
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{name: "push 1 byte 0x06", data: []byte{0x06}, expected: []byte{OP_6}},
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{name: "push 1 byte 0x07", data: []byte{0x07}, expected: []byte{OP_7}},
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{name: "push 1 byte 0x08", data: []byte{0x08}, expected: []byte{OP_8}},
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{name: "push 1 byte 0x09", data: []byte{0x09}, expected: []byte{OP_9}},
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{name: "push 1 byte 0x0a", data: []byte{0x0a}, expected: []byte{OP_10}},
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{name: "push 1 byte 0x0b", data: []byte{0x0b}, expected: []byte{OP_11}},
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{name: "push 1 byte 0x0c", data: []byte{0x0c}, expected: []byte{OP_12}},
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{name: "push 1 byte 0x0d", data: []byte{0x0d}, expected: []byte{OP_13}},
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{name: "push 1 byte 0x0e", data: []byte{0x0e}, expected: []byte{OP_14}},
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{name: "push 1 byte 0x0f", data: []byte{0x0f}, expected: []byte{OP_15}},
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{name: "push 1 byte 0x10", data: []byte{0x10}, expected: []byte{OP_16}},
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// BIP0062: Pushing the byte 0x81 must use OP_1NEGATE.
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{name: "push 1 byte 0x81", data: []byte{0x81}, expected: []byte{OP_1NEGATE}},
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// BIP0062: Pushing any other byte sequence up to 75 bytes must
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// use the normal data push (opcode byte n, with n the number of
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// bytes, followed n bytes of data being pushed).
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{name: "push 1 byte 0x11", data: []byte{0x11}, expected: []byte{OP_DATA_1, 0x11}},
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{name: "push 1 byte 0x80", data: []byte{0x80}, expected: []byte{OP_DATA_1, 0x80}},
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{name: "push 1 byte 0x82", data: []byte{0x82}, expected: []byte{OP_DATA_1, 0x82}},
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{name: "push 1 byte 0xff", data: []byte{0xff}, expected: []byte{OP_DATA_1, 0xff}},
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{
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name: "push data len 17",
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data: bytes.Repeat([]byte{0x49}, 17),
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expected: append([]byte{OP_DATA_17}, bytes.Repeat([]byte{0x49}, 17)...),
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},
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{
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name: "push data len 75",
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data: bytes.Repeat([]byte{0x49}, 75),
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expected: append([]byte{OP_DATA_75}, bytes.Repeat([]byte{0x49}, 75)...),
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},
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// BIP0062: Pushing 76 to 255 bytes must use OP_PUSHDATA1.
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{
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name: "push data len 76",
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data: bytes.Repeat([]byte{0x49}, 76),
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expected: append([]byte{OP_PUSHDATA1, 76}, bytes.Repeat([]byte{0x49}, 76)...),
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},
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{
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name: "push data len 255",
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data: bytes.Repeat([]byte{0x49}, 255),
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expected: append([]byte{OP_PUSHDATA1, 255}, bytes.Repeat([]byte{0x49}, 255)...),
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},
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// BIP0062: Pushing 256 to 520 bytes must use OP_PUSHDATA2.
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{
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name: "push data len 256",
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data: bytes.Repeat([]byte{0x49}, 256),
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expected: append([]byte{OP_PUSHDATA2, 0, 1}, bytes.Repeat([]byte{0x49}, 256)...),
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},
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{
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name: "push data len 520",
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data: bytes.Repeat([]byte{0x49}, 520),
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expected: append([]byte{OP_PUSHDATA2, 0x08, 0x02}, bytes.Repeat([]byte{0x49}, 520)...),
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},
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// BIP0062: OP_PUSHDATA4 can never be used, as pushes over 520
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// bytes are not allowed, and those below can be done using
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// other operators.
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{
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name: "push data len 521",
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data: bytes.Repeat([]byte{0x49}, 521),
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expected: nil,
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},
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{
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name: "push data len 32767 (canonical)",
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data: bytes.Repeat([]byte{0x49}, 32767),
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expected: nil,
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},
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{
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name: "push data len 65536 (canonical)",
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data: bytes.Repeat([]byte{0x49}, 65536),
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expected: nil,
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},
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// Additional tests for the PushFullData function that
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// intentionally allows data pushes to exceed the limit for
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// regression testing purposes.
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// 3-byte data push via OP_PUSHDATA_2.
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{
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name: "push data len 32767 (non-canonical)",
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data: bytes.Repeat([]byte{0x49}, 32767),
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expected: append([]byte{OP_PUSHDATA2, 255, 127}, bytes.Repeat([]byte{0x49}, 32767)...),
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useFull: true,
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},
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// 5-byte data push via OP_PUSHDATA_4.
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{
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name: "push data len 65536 (non-canonical)",
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data: bytes.Repeat([]byte{0x49}, 65536),
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expected: append([]byte{OP_PUSHDATA4, 0, 0, 1, 0}, bytes.Repeat([]byte{0x49}, 65536)...),
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useFull: true,
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},
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}
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builder := NewScriptBuilder()
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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if !test.useFull {
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builder.Reset().AddData(test.data)
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} else {
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builder.Reset().AddFullData(test.data)
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}
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result, _ := builder.Script()
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if !bytes.Equal(result, test.expected) {
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t.Errorf("ScriptBuilder.AddData #%d (%s) wrong result\n"+
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"got: %x\nwant: %x", i, test.name, result,
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test.expected)
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continue
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}
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}
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}
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// TestExceedMaxScriptSize ensures that all of the functions that can be used
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// to add data to a script don't allow the script to exceed the max allowed
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// size.
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func TestExceedMaxScriptSize(t *testing.T) {
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t.Parallel()
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// Start off by constructing a max size script.
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builder := NewScriptBuilder()
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builder.Reset().AddFullData(make([]byte, MaxScriptSize-3))
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origScript, err := builder.Script()
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if err != nil {
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t.Fatalf("Unexpected error for max size script: %v", err)
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}
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// Ensure adding data that would exceed the maximum size of the script
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// does not add the data.
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script, err := builder.AddData([]byte{0x00}).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatalf("ScriptBuilder.AddData allowed exceeding max script "+
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"size: %v", len(script))
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddData unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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// Ensure adding an opcode that would exceed the maximum size of the
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// script does not add the data.
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builder.Reset().AddFullData(make([]byte, MaxScriptSize-3))
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script, err = builder.AddOp(OP_0).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatalf("ScriptBuilder.AddOp unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddOp unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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// Ensure adding an integer that would exceed the maximum size of the
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// script does not add the data.
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builder.Reset().AddFullData(make([]byte, MaxScriptSize-3))
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script, err = builder.AddInt64(0).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatalf("ScriptBuilder.AddInt64 unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddInt64 unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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}
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// TestErroredScript ensures that all of the functions that can be used to add
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// data to a script don't modify the script once an error has happened.
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func TestErroredScript(t *testing.T) {
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t.Parallel()
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// Start off by constructing a near max size script that has enough
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// space left to add each data type without an error and force an
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// initial error condition.
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builder := NewScriptBuilder()
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builder.Reset().AddFullData(make([]byte, MaxScriptSize-8))
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origScript, err := builder.Script()
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if err != nil {
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t.Fatalf("ScriptBuilder.AddFullData unexpected error: %v", err)
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}
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script, err := builder.AddData([]byte{0x00, 0x00, 0x00, 0x00, 0x00}).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatalf("ScriptBuilder.AddData allowed exceeding max script "+
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"size: %v", len(script))
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddData unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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// Ensure adding data, even using the non-canonical path, to a script
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// that has errored doesn't succeed.
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script, err = builder.AddFullData([]byte{0x00}).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatal("ScriptBuilder.AddFullData succeeded on errored script")
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddFullData unexpected modified "+
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"script - got len %d, want len %d", len(script),
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len(origScript))
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}
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// Ensure adding data to a script that has errored doesn't succeed.
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script, err = builder.AddData([]byte{0x00}).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatal("ScriptBuilder.AddData succeeded on errored script")
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddData unexpected modified "+
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"script - got len %d, want len %d", len(script),
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len(origScript))
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}
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// Ensure adding an opcode to a script that has errored doesn't succeed.
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script, err = builder.AddOp(OP_0).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatal("ScriptBuilder.AddOp succeeded on errored script")
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddOp unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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// Ensure adding an integer to a script that has errored doesn't
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// succeed.
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script, err = builder.AddInt64(0).Script()
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if _, ok := err.(ErrScriptNotCanonical); !ok || err == nil {
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t.Fatal("ScriptBuilder.AddInt64 succeeded on errored script")
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}
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if !bytes.Equal(script, origScript) {
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t.Fatalf("ScriptBuilder.AddInt64 unexpected modified script - "+
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"got len %d, want len %d", len(script), len(origScript))
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}
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// Ensure the error has a message set.
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if err.Error() == "" {
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t.Fatal("ErrScriptNotCanonical.Error does not have any text")
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}
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}
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