mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-10-16 15:43:25 +00:00
287 lines
7.7 KiB
Go
287 lines
7.7 KiB
Go
package vm
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import (
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"encoding/binary"
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"testing"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util/bitfield"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func testSignatureContract() []byte {
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prog := make([]byte, 40)
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prog[0] = byte(opcode.PUSHDATA1)
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prog[1] = 33
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prog[35] = byte(opcode.SYSCALL)
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binary.LittleEndian.PutUint32(prog[36:], verifyInteropID)
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return prog
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}
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func TestParseSignatureContract(t *testing.T) {
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prog := testSignatureContract()
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pub := randomBytes(33)
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copy(prog[2:], pub)
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actual, ok := ParseSignatureContract(prog)
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require.True(t, ok)
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require.Equal(t, pub, actual)
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}
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func TestIsSignatureContract(t *testing.T) {
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t.Run("valid contract", func(t *testing.T) {
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prog := testSignatureContract()
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assert.True(t, IsSignatureContract(prog))
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assert.True(t, IsStandardContract(prog))
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})
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t.Run("invalid interop ID", func(t *testing.T) {
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prog := testSignatureContract()
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binary.LittleEndian.PutUint32(prog[36:], ^verifyInteropID)
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assert.False(t, IsSignatureContract(prog))
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assert.False(t, IsStandardContract(prog))
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})
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t.Run("invalid pubkey size", func(t *testing.T) {
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prog := testSignatureContract()
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prog[1] = 32
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assert.False(t, IsSignatureContract(prog))
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assert.False(t, IsStandardContract(prog))
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})
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t.Run("invalid length", func(t *testing.T) {
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prog := testSignatureContract()
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prog = append(prog, 0)
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assert.False(t, IsSignatureContract(prog))
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assert.False(t, IsStandardContract(prog))
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})
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}
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func testMultisigContract(t *testing.T, n, m int) []byte {
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pubs := make(keys.PublicKeys, n)
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for i := 0; i < n; i++ {
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priv, err := keys.NewPrivateKey()
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require.NoError(t, err)
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pubs[i] = priv.PublicKey()
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}
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prog, err := smartcontract.CreateMultiSigRedeemScript(m, pubs)
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require.NoError(t, err)
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return prog
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}
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func TestIsMultiSigContract(t *testing.T) {
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t.Run("valid contract", func(t *testing.T) {
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prog := testMultisigContract(t, 2, 2)
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assert.True(t, IsMultiSigContract(prog))
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assert.True(t, IsStandardContract(prog))
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})
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t.Run("0-length", func(t *testing.T) {
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assert.False(t, IsMultiSigContract([]byte{}))
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})
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t.Run("invalid param", func(t *testing.T) {
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prog := []byte{byte(opcode.PUSHDATA1), 10}
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assert.False(t, IsMultiSigContract(prog))
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})
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t.Run("too many keys", func(t *testing.T) {
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prog := testMultisigContract(t, 1025, 1)
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assert.False(t, IsMultiSigContract(prog))
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})
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t.Run("invalid interop ID", func(t *testing.T) {
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prog := testMultisigContract(t, 2, 2)
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prog[len(prog)-4] ^= 0xFF
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assert.False(t, IsMultiSigContract(prog))
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})
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t.Run("invalid keys number", func(t *testing.T) {
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prog := testMultisigContract(t, 2, 2)
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prog[len(prog)-6] = byte(opcode.PUSH3)
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assert.False(t, IsMultiSigContract(prog))
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})
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t.Run("invalid length", func(t *testing.T) {
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prog := testMultisigContract(t, 2, 2)
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prog = append(prog, 0)
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assert.False(t, IsMultiSigContract(prog))
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})
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}
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func TestIsScriptCorrect(t *testing.T) {
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w := io.NewBufBinWriter()
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emit.String(w.BinWriter, "something")
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jmpOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.JMP, opcode.Opcode(-jmpOff))
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retOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.RET)
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jmplOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.JMPL, opcode.Opcode(0xff), opcode.Opcode(0xff), opcode.Opcode(0xff), opcode.Opcode(0xff))
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tryOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.TRY, opcode.Opcode(3), opcode.Opcode(0xfb)) // -5
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trylOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.TRYL, opcode.Opcode(0xfd), opcode.Opcode(0xff), opcode.Opcode(0xff), opcode.Opcode(0xff),
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opcode.Opcode(9), opcode.Opcode(0), opcode.Opcode(0), opcode.Opcode(0))
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istypeOff := w.Len()
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emit.Opcodes(w.BinWriter, opcode.ISTYPE, opcode.Opcode(stackitem.IntegerT))
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pushOff := w.Len()
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emit.String(w.BinWriter, "else")
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good := w.Bytes()
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getScript := func() []byte {
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s := make([]byte, len(good))
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copy(s, good)
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return s
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}
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t.Run("good", func(t *testing.T) {
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require.NoError(t, IsScriptCorrect(good, nil))
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})
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t.Run("bad instruction", func(t *testing.T) {
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bad := getScript()
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bad[retOff] = 0xff
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds JMP 1", func(t *testing.T) {
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bad := getScript()
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bad[jmpOff+1] = 0x80 // -128
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds JMP 2", func(t *testing.T) {
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bad := getScript()
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bad[jmpOff+1] = 0x7f
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad JMP offset 1", func(t *testing.T) {
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bad := getScript()
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bad[jmpOff+1] = 0xff // into "something"
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad JMP offset 2", func(t *testing.T) {
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bad := getScript()
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bad[jmpOff+1] = byte(pushOff - jmpOff + 1)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds JMPL 1", func(t *testing.T) {
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bad := getScript()
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bad[jmplOff+1] = byte(-jmplOff - 1)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds JMPL 1", func(t *testing.T) {
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bad := getScript()
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bad[jmplOff+1] = byte(len(bad)-jmplOff) + 1
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bad[jmplOff+2] = 0
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bad[jmplOff+3] = 0
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bad[jmplOff+4] = 0
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("JMP to a len(script)", func(t *testing.T) {
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bad := make([]byte, 64) // 64 is the word-size of a bitset.
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bad[0] = byte(opcode.JMP)
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bad[1] = 64
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require.NoError(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad JMPL offset", func(t *testing.T) {
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bad := getScript()
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bad[jmplOff+1] = 0xfe // into JMP
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds TRY 1", func(t *testing.T) {
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bad := getScript()
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bad[tryOff+1] = byte(-tryOff - 1)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds TRY 2", func(t *testing.T) {
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bad := getScript()
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bad[tryOff+1] = byte(len(bad)-tryOff) + 1
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("out of bounds TRY 2", func(t *testing.T) {
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bad := getScript()
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bad[tryOff+2] = byte(len(bad)-tryOff) + 1
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("TRY with jumps to a len(script)", func(t *testing.T) {
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bad := make([]byte, 64) // 64 is the word-size of a bitset.
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bad[0] = byte(opcode.TRY)
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bad[1] = 64
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bad[2] = 64
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bad[3] = byte(opcode.RET) // pad so that remaining script (PUSHINT8 0) is even in length.
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require.NoError(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad TRYL offset 1", func(t *testing.T) {
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bad := getScript()
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bad[trylOff+1] = byte(-(trylOff - jmpOff) - 1) // into "something"
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad TRYL offset 2", func(t *testing.T) {
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bad := getScript()
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bad[trylOff+5] = byte(len(bad) - trylOff - 1)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad ISTYPE type", func(t *testing.T) {
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bad := getScript()
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bad[istypeOff+1] = byte(0xff)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("bad ISTYPE type (Any)", func(t *testing.T) {
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bad := getScript()
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bad[istypeOff+1] = byte(stackitem.AnyT)
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require.Error(t, IsScriptCorrect(bad, nil))
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})
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t.Run("good NEWARRAY_T type", func(t *testing.T) {
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bad := getScript()
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bad[istypeOff] = byte(opcode.NEWARRAYT)
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bad[istypeOff+1] = byte(stackitem.AnyT)
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require.NoError(t, IsScriptCorrect(bad, nil))
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})
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t.Run("good methods", func(t *testing.T) {
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methods := bitfield.New(len(good))
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methods.Set(retOff)
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methods.Set(tryOff)
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methods.Set(pushOff)
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require.NoError(t, IsScriptCorrect(good, methods))
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})
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t.Run("bad methods", func(t *testing.T) {
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methods := bitfield.New(len(good))
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methods.Set(retOff)
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methods.Set(tryOff)
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methods.Set(pushOff + 1)
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require.Error(t, IsScriptCorrect(good, methods))
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})
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}
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