372 lines
12 KiB
Go
372 lines
12 KiB
Go
package native
|
|
|
|
import (
|
|
"crypto/elliptic"
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/consensys/gnark-crypto/ecc/bls12-381/fr"
|
|
"github.com/decred/dcrd/dcrec/secp256k1/v4"
|
|
"github.com/nspcc-dev/neo-go/pkg/config"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/dao"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/interop"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
|
|
"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"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
|
|
"github.com/twmb/murmur3"
|
|
"golang.org/x/crypto/sha3"
|
|
)
|
|
|
|
// Crypto represents CryptoLib contract.
|
|
type Crypto struct {
|
|
interop.ContractMD
|
|
}
|
|
|
|
// HashFunc is a delegate representing a hasher function with 256 bytes output length.
|
|
type HashFunc func([]byte) util.Uint256
|
|
|
|
// NamedCurveHash identifies a pair of named elliptic curve and hash function.
|
|
type NamedCurveHash byte
|
|
|
|
// Various pairs of named elliptic curves and hash functions.
|
|
const (
|
|
Secp256k1Sha256 NamedCurveHash = 22
|
|
Secp256r1Sha256 NamedCurveHash = 23
|
|
Secp256k1Keccak256 NamedCurveHash = 122
|
|
Secp256r1Keccak256 NamedCurveHash = 123
|
|
)
|
|
|
|
const cryptoContractID = -3
|
|
|
|
func newCrypto() *Crypto {
|
|
c := &Crypto{ContractMD: *interop.NewContractMD(nativenames.CryptoLib, cryptoContractID)}
|
|
defer c.BuildHFSpecificMD(c.ActiveIn())
|
|
|
|
desc := newDescriptor("sha256", smartcontract.ByteArrayType,
|
|
manifest.NewParameter("data", smartcontract.ByteArrayType))
|
|
md := newMethodAndPrice(c.sha256, 1<<15, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("ripemd160", smartcontract.ByteArrayType,
|
|
manifest.NewParameter("data", smartcontract.ByteArrayType))
|
|
md = newMethodAndPrice(c.ripemd160, 1<<15, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("murmur32", smartcontract.ByteArrayType,
|
|
manifest.NewParameter("data", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("seed", smartcontract.IntegerType))
|
|
md = newMethodAndPrice(c.murmur32, 1<<13, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("verifyWithECDsa", smartcontract.BoolType,
|
|
manifest.NewParameter("message", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("pubkey", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("signature", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("curve", smartcontract.IntegerType))
|
|
md = newMethodAndPrice(c.verifyWithECDsaPreCockatrice, 1<<15, callflag.NoneFlag, config.HFDefault, config.HFCockatrice)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("verifyWithECDsa", smartcontract.BoolType,
|
|
manifest.NewParameter("message", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("pubkey", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("signature", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("curveHash", smartcontract.IntegerType))
|
|
md = newMethodAndPrice(c.verifyWithECDsa, 1<<15, callflag.NoneFlag, config.HFCockatrice)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Serialize", smartcontract.ByteArrayType,
|
|
manifest.NewParameter("g", smartcontract.InteropInterfaceType))
|
|
md = newMethodAndPrice(c.bls12381Serialize, 1<<19, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Deserialize", smartcontract.InteropInterfaceType,
|
|
manifest.NewParameter("data", smartcontract.ByteArrayType))
|
|
md = newMethodAndPrice(c.bls12381Deserialize, 1<<19, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Equal", smartcontract.BoolType,
|
|
manifest.NewParameter("x", smartcontract.InteropInterfaceType),
|
|
manifest.NewParameter("y", smartcontract.InteropInterfaceType))
|
|
md = newMethodAndPrice(c.bls12381Equal, 1<<5, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Add", smartcontract.InteropInterfaceType,
|
|
manifest.NewParameter("x", smartcontract.InteropInterfaceType),
|
|
manifest.NewParameter("y", smartcontract.InteropInterfaceType))
|
|
md = newMethodAndPrice(c.bls12381Add, 1<<19, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Mul", smartcontract.InteropInterfaceType,
|
|
manifest.NewParameter("x", smartcontract.InteropInterfaceType),
|
|
manifest.NewParameter("mul", smartcontract.ByteArrayType),
|
|
manifest.NewParameter("neg", smartcontract.BoolType))
|
|
md = newMethodAndPrice(c.bls12381Mul, 1<<21, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("bls12381Pairing", smartcontract.InteropInterfaceType,
|
|
manifest.NewParameter("g1", smartcontract.InteropInterfaceType),
|
|
manifest.NewParameter("g2", smartcontract.InteropInterfaceType))
|
|
md = newMethodAndPrice(c.bls12381Pairing, 1<<23, callflag.NoneFlag)
|
|
c.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("keccak256", smartcontract.ByteArrayType,
|
|
manifest.NewParameter("data", smartcontract.ByteArrayType))
|
|
md = newMethodAndPrice(c.keccak256, 1<<15, callflag.NoneFlag, config.HFCockatrice)
|
|
c.AddMethod(md, desc)
|
|
return c
|
|
}
|
|
|
|
func (c *Crypto) sha256(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
bs, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewByteArray(hash.Sha256(bs).BytesBE())
|
|
}
|
|
|
|
func (c *Crypto) ripemd160(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
bs, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewByteArray(hash.RipeMD160(bs).BytesBE())
|
|
}
|
|
|
|
func (c *Crypto) murmur32(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
bs, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
seed := toUint32(args[1])
|
|
h := murmur3.SeedSum32(seed, bs)
|
|
result := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(result, h)
|
|
return stackitem.NewByteArray(result)
|
|
}
|
|
|
|
func (c *Crypto) verifyWithECDsaPreCockatrice(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
return verifyWithECDsaGeneric(args, false)
|
|
}
|
|
|
|
func (c *Crypto) verifyWithECDsa(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
return verifyWithECDsaGeneric(args, true)
|
|
}
|
|
|
|
func verifyWithECDsaGeneric(args []stackitem.Item, allowKeccak bool) stackitem.Item {
|
|
msg, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid message stackitem: %w", err))
|
|
}
|
|
pubkey, err := args[1].TryBytes()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid pubkey stackitem: %w", err))
|
|
}
|
|
signature, err := args[2].TryBytes()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid signature stackitem: %w", err))
|
|
}
|
|
curve, hasher, err := curveHasherFromStackitem(args[3], allowKeccak)
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid curveHash stackitem: %w", err))
|
|
}
|
|
hashToCheck := hasher(msg)
|
|
pkey, err := keys.NewPublicKeyFromBytes(pubkey, curve)
|
|
if err != nil {
|
|
panic(fmt.Errorf("failed to decode pubkey: %w", err))
|
|
}
|
|
res := pkey.Verify(signature, hashToCheck.BytesBE())
|
|
return stackitem.NewBool(res)
|
|
}
|
|
|
|
func curveHasherFromStackitem(si stackitem.Item, allowKeccak bool) (elliptic.Curve, HashFunc, error) {
|
|
curve, err := si.TryInteger()
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
if !curve.IsInt64() {
|
|
return nil, nil, errors.New("not an int64")
|
|
}
|
|
c := curve.Int64()
|
|
switch c {
|
|
case int64(Secp256k1Sha256):
|
|
return secp256k1.S256(), hash.Sha256, nil
|
|
case int64(Secp256r1Sha256):
|
|
return elliptic.P256(), hash.Sha256, nil
|
|
case int64(Secp256k1Keccak256):
|
|
if !allowKeccak {
|
|
return nil, nil, errors.New("unsupported hash type")
|
|
}
|
|
return secp256k1.S256(), Keccak256, nil
|
|
case int64(Secp256r1Keccak256):
|
|
if !allowKeccak {
|
|
return nil, nil, errors.New("unsupported hash type")
|
|
}
|
|
return elliptic.P256(), Keccak256, nil
|
|
default:
|
|
return nil, nil, errors.New("unsupported curve/hash type")
|
|
}
|
|
}
|
|
|
|
func (c *Crypto) bls12381Serialize(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
val, ok := args[0].(*stackitem.Interop).Value().(blsPoint)
|
|
if !ok {
|
|
panic(errors.New("not a bls12381 point"))
|
|
}
|
|
return stackitem.NewByteArray(val.Bytes())
|
|
}
|
|
|
|
func (c *Crypto) bls12381Deserialize(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
buf, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid serialized bls12381 point: %w", err))
|
|
}
|
|
p := new(blsPoint)
|
|
err = p.FromBytes(buf)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewInterop(*p)
|
|
}
|
|
|
|
func (c *Crypto) bls12381Equal(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
a, okA := args[0].(*stackitem.Interop).Value().(blsPoint)
|
|
b, okB := args[1].(*stackitem.Interop).Value().(blsPoint)
|
|
if !(okA && okB) {
|
|
panic("some of the arguments are not a bls12381 point")
|
|
}
|
|
res, err := a.EqualsCheckType(b)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewBool(res)
|
|
}
|
|
|
|
func (c *Crypto) bls12381Add(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
a, okA := args[0].(*stackitem.Interop).Value().(blsPoint)
|
|
b, okB := args[1].(*stackitem.Interop).Value().(blsPoint)
|
|
if !(okA && okB) {
|
|
panic("some of the arguments are not a bls12381 point")
|
|
}
|
|
|
|
p, err := blsPointAdd(a, b)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewInterop(p)
|
|
}
|
|
|
|
func scalarFromBytes(bytes []byte, neg bool) (*fr.Element, error) {
|
|
alpha := new(fr.Element)
|
|
if len(bytes) != fr.Bytes {
|
|
return nil, fmt.Errorf("invalid multiplier: 32-bytes scalar is expected, got %d", len(bytes))
|
|
}
|
|
// The input bytes are in the LE form, so we can't use fr.Element.SetBytesCanonical as far
|
|
// as it accepts BE. Confirmed by https://github.com/neo-project/neo/issues/2647#issuecomment-1129849870
|
|
// and by https://github.com/nspcc-dev/neo-go/pull/3043#issuecomment-1733424840.
|
|
v, err := fr.LittleEndian.Element((*[fr.Bytes]byte)(bytes))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid multiplier: failed to decode scalar: %w", err)
|
|
}
|
|
*alpha = v
|
|
if neg {
|
|
alpha.Neg(alpha)
|
|
}
|
|
return alpha, nil
|
|
}
|
|
|
|
func (c *Crypto) bls12381Mul(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
a, okA := args[0].(*stackitem.Interop).Value().(blsPoint)
|
|
if !okA {
|
|
panic("multiplier is not a bls12381 point")
|
|
}
|
|
mulBytes, err := args[1].TryBytes()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid multiplier: %w", err))
|
|
}
|
|
neg, err := args[2].TryBool()
|
|
if err != nil {
|
|
panic(fmt.Errorf("invalid negative argument: %w", err))
|
|
}
|
|
alpha, err := scalarFromBytes(mulBytes, neg)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
alphaBi := new(big.Int)
|
|
alpha.BigInt(alphaBi)
|
|
|
|
p, err := blsPointMul(a, alphaBi)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewInterop(p)
|
|
}
|
|
|
|
func (c *Crypto) bls12381Pairing(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
a, okA := args[0].(*stackitem.Interop).Value().(blsPoint)
|
|
b, okB := args[1].(*stackitem.Interop).Value().(blsPoint)
|
|
if !(okA && okB) {
|
|
panic("some of the arguments are not a bls12381 point")
|
|
}
|
|
|
|
p, err := blsPointPairing(a, b)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewInterop(p)
|
|
}
|
|
|
|
func (c *Crypto) keccak256(_ *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
bs, err := args[0].TryBytes()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.NewByteArray(Keccak256(bs).BytesBE())
|
|
}
|
|
|
|
// Metadata implements the Contract interface.
|
|
func (c *Crypto) Metadata() *interop.ContractMD {
|
|
return &c.ContractMD
|
|
}
|
|
|
|
// Initialize implements the Contract interface.
|
|
func (c *Crypto) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
|
|
return nil
|
|
}
|
|
|
|
// InitializeCache implements the Contract interface.
|
|
func (c *Crypto) InitializeCache(blockHeight uint32, d *dao.Simple) error {
|
|
return nil
|
|
}
|
|
|
|
// OnPersist implements the Contract interface.
|
|
func (c *Crypto) OnPersist(ic *interop.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// PostPersist implements the Contract interface.
|
|
func (c *Crypto) PostPersist(ic *interop.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// ActiveIn implements the Contract interface.
|
|
func (c *Crypto) ActiveIn() *config.Hardfork {
|
|
return nil
|
|
}
|
|
|
|
// Keccak256 hashes the incoming byte slice using the
|
|
// keccak256 algorithm.
|
|
func Keccak256(data []byte) util.Uint256 {
|
|
var hash util.Uint256
|
|
hasher := sha3.NewLegacyKeccak256()
|
|
_, _ = hasher.Write(data)
|
|
|
|
hasher.Sum(hash[:0])
|
|
return hash
|
|
}
|