package crypto import ( "encoding/binary" "fmt" "testing" "github.com/nspcc-dev/neo-go/internal/fakechain" "github.com/nspcc-dev/neo-go/pkg/config/netmode" "github.com/nspcc-dev/neo-go/pkg/core/dao" "github.com/nspcc-dev/neo-go/pkg/core/fee" "github.com/nspcc-dev/neo-go/pkg/core/interop" "github.com/nspcc-dev/neo-go/pkg/core/storage" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/crypto/hash" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/neo-go/pkg/vm" "github.com/nspcc-dev/neo-go/pkg/vm/opcode" "github.com/nspcc-dev/neo-go/pkg/vm/stackitem" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func initCHECKMULTISIG(msgHash util.Uint256, n int) ([]stackitem.Item, []stackitem.Item, map[string]*keys.PublicKey, error) { var err error keyMap := make(map[string]*keys.PublicKey) pkeys := make([]*keys.PrivateKey, n) pubs := make([]stackitem.Item, n) for i := range pubs { pkeys[i], err = keys.NewPrivateKey() if err != nil { return nil, nil, nil, err } pk := pkeys[i].PublicKey() data := pk.Bytes() pubs[i] = stackitem.NewByteArray(data) keyMap[string(data)] = pk } sigs := make([]stackitem.Item, n) for i := range sigs { sig := pkeys[i].SignHash(msgHash) sigs[i] = stackitem.NewByteArray(sig) } return pubs, sigs, keyMap, nil } func subSlice(arr []stackitem.Item, indices []int) []stackitem.Item { if indices == nil { return arr } result := make([]stackitem.Item, len(indices)) for i, j := range indices { result[i] = arr[j] } return result } func initCheckMultisigVMNoArgs(container *transaction.Transaction) *vm.VM { buf := make([]byte, 5) buf[0] = byte(opcode.SYSCALL) binary.LittleEndian.PutUint32(buf[1:], neoCryptoCheckMultisigID) ic := interop.NewContext( trigger.Verification, fakechain.NewFakeChain(), dao.NewSimple(storage.NewMemoryStore(), false, false), nil, nil, nil, container, nil) ic.Container = container ic.Functions = Interops v := ic.SpawnVM() v.LoadScript(buf) return v } func initCHECKMULTISIGVM(t *testing.T, n int, ik, is []int) *vm.VM { tx := transaction.New([]byte("NEO - An Open Network For Smart Economy"), 10) tx.Signers = []transaction.Signer{{Account: util.Uint160{1, 2, 3}}} tx.Scripts = []transaction.Witness{{}} v := initCheckMultisigVMNoArgs(tx) pubs, sigs, _, err := initCHECKMULTISIG(hash.NetSha256(uint32(netmode.UnitTestNet), tx), n) require.NoError(t, err) pubs = subSlice(pubs, ik) sigs = subSlice(sigs, is) v.Estack().PushVal(sigs) v.Estack().PushVal(pubs) return v } func testCHECKMULTISIGGood(t *testing.T, n int, is []int) { v := initCHECKMULTISIGVM(t, n, nil, is) require.NoError(t, v.Run()) assert.Equal(t, 1, v.Estack().Len()) assert.True(t, v.Estack().Pop().Bool()) } func TestECDSASecp256r1CheckMultisigGood(t *testing.T) { testCurveCHECKMULTISIGGood(t) } func testCurveCHECKMULTISIGGood(t *testing.T) { t.Run("3_1", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{1}) }) t.Run("2_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 2, []int{0, 1}) }) t.Run("3_3", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{0, 1, 2}) }) t.Run("3_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{0, 2}) }) t.Run("4_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 4, []int{0, 2}) }) t.Run("10_7", func(t *testing.T) { testCHECKMULTISIGGood(t, 10, []int{2, 3, 4, 5, 6, 8, 9}) }) t.Run("12_9", func(t *testing.T) { testCHECKMULTISIGGood(t, 12, []int{0, 1, 4, 5, 6, 7, 8, 9}) }) } func testCHECKMULTISIGBad(t *testing.T, isErr bool, n int, ik, is []int) { v := initCHECKMULTISIGVM(t, n, ik, is) if isErr { require.Error(t, v.Run()) return } require.NoError(t, v.Run()) assert.Equal(t, 1, v.Estack().Len()) assert.False(t, v.Estack().Pop().Bool()) } func TestECDSASecp256r1CheckMultisigBad(t *testing.T) { testCurveCHECKMULTISIGBad(t) } func testCurveCHECKMULTISIGBad(t *testing.T) { t.Run("1_1 wrong signature", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 2, []int{0}, []int{1}) }) t.Run("3_2 wrong order", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 3, []int{0, 2}, []int{2, 0}) }) t.Run("3_2 duplicate sig", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 3, nil, []int{0, 0}) }) t.Run("1_2 too many signatures", func(t *testing.T) { testCHECKMULTISIGBad(t, true, 2, []int{0}, []int{0, 1}) }) t.Run("gas limit exceeded", func(t *testing.T) { v := initCHECKMULTISIGVM(t, 1, []int{0}, []int{0}) v.GasLimit = fee.ECDSAVerifyPrice - 1 require.Error(t, v.Run()) }) msg := []byte("NEO - An Open Network For Smart Economy") pubs, sigs, _, err := initCHECKMULTISIG(hash.Sha256(msg), 1) require.NoError(t, err) arr := stackitem.NewArray([]stackitem.Item{stackitem.NewArray(nil)}) tx := transaction.New([]byte("NEO - An Open Network For Smart Economy"), 10) tx.Signers = []transaction.Signer{{Account: util.Uint160{1, 2, 3}}} tx.Scripts = []transaction.Witness{{}} t.Run("invalid public keys", func(t *testing.T) { v := initCheckMultisigVMNoArgs(tx) v.Estack().PushVal(sigs) v.Estack().PushVal(arr) require.Error(t, v.Run()) }) t.Run("invalid signatures", func(t *testing.T) { v := initCheckMultisigVMNoArgs(tx) v.Estack().PushVal(arr) v.Estack().PushVal(pubs) require.Error(t, v.Run()) }) } func TestCheckSig(t *testing.T) { priv, err := keys.NewPrivateKey() require.NoError(t, err) verifyFunc := ECDSASecp256r1CheckSig d := dao.NewSimple(storage.NewMemoryStore(), false, false) ic := &interop.Context{Network: uint32(netmode.UnitTestNet), DAO: d} runCase := func(t *testing.T, isErr bool, result interface{}, args ...interface{}) { ic.SpawnVM() for i := range args { ic.VM.Estack().PushVal(args[i]) } var err error func() { defer func() { if r := recover(); r != nil { err = fmt.Errorf("panic: %v", r) } }() err = verifyFunc(ic) }() if isErr { require.Error(t, err) return } require.NoError(t, err) require.Equal(t, 1, ic.VM.Estack().Len()) require.Equal(t, result, ic.VM.Estack().Pop().Value().(bool)) } tx := transaction.New([]byte{0, 1, 2}, 1) ic.Container = tx t.Run("success", func(t *testing.T) { sign := priv.SignHashable(uint32(netmode.UnitTestNet), tx) runCase(t, false, true, sign, priv.PublicKey().Bytes()) }) t.Run("missing argument", func(t *testing.T) { runCase(t, true, false) sign := priv.SignHashable(uint32(netmode.UnitTestNet), tx) runCase(t, true, false, sign) }) t.Run("invalid signature", func(t *testing.T) { sign := priv.SignHashable(uint32(netmode.UnitTestNet), tx) sign[0] = ^sign[0] runCase(t, false, false, sign, priv.PublicKey().Bytes()) }) t.Run("invalid public key", func(t *testing.T) { sign := priv.SignHashable(uint32(netmode.UnitTestNet), tx) pub := priv.PublicKey().Bytes() pub[0] = 0xFF // invalid prefix runCase(t, true, false, sign, pub) }) }