mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-10 18:25:17 +00:00
470 lines
11 KiB
Go
470 lines
11 KiB
Go
package crypto
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import (
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"bytes"
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"crypto"
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"crypto/rand"
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"encoding/binary"
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"math/big"
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"github.com/cloudflare/circl/sign/ed448"
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"github.com/iden3/go-iden3-crypto/poseidon"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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"golang.org/x/crypto/sha3"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/vdf"
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"source.quilibrium.com/quilibrium/monorepo/node/keys"
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"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
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"source.quilibrium.com/quilibrium/monorepo/node/tries"
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)
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type WesolowskiFrameProver struct {
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logger *zap.Logger
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}
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func NewWesolowskiFrameProver(logger *zap.Logger) *WesolowskiFrameProver {
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return &WesolowskiFrameProver{
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logger,
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}
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}
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func (w *WesolowskiFrameProver) ProveMasterClockFrame(
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previousFrame *protobufs.ClockFrame,
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timestamp int64,
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difficulty uint32,
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) (*protobufs.ClockFrame, error) {
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input := []byte{}
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input = append(input, previousFrame.Filter...)
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input = binary.BigEndian.AppendUint64(input, previousFrame.FrameNumber+1)
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input = binary.BigEndian.AppendUint32(input, difficulty)
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input = append(input, previousFrame.Output[:]...)
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b := sha3.Sum256(input)
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v := vdf.New(difficulty, b)
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v.Execute()
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o := v.GetOutput()
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previousSelectorBytes := [516]byte{}
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copy(previousSelectorBytes[:], previousFrame.Output[:516])
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parent, err := poseidon.HashBytes(previousSelectorBytes[:])
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if err != nil {
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return nil, errors.Wrap(err, "prove clock frame")
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}
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frame := &protobufs.ClockFrame{
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Filter: previousFrame.Filter,
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FrameNumber: previousFrame.FrameNumber + 1,
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Timestamp: timestamp,
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Difficulty: difficulty,
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ParentSelector: parent.FillBytes(make([]byte, 32)),
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Input: previousFrame.Output,
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AggregateProofs: []*protobufs.InclusionAggregateProof{},
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Output: o[:],
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}
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return frame, nil
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}
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func (w *WesolowskiFrameProver) VerifyMasterClockFrame(
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frame *protobufs.ClockFrame,
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) error {
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input := []byte{}
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input = append(input, frame.Filter...)
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input = binary.BigEndian.AppendUint64(input, frame.FrameNumber)
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input = binary.BigEndian.AppendUint32(input, frame.Difficulty)
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input = append(input, frame.Input...)
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if len(frame.Input) < 516 {
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return errors.Wrap(
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errors.New("invalid input"),
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"verify clock frame",
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)
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}
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if len(frame.AggregateProofs) > 0 {
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return errors.Wrap(
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errors.New("invalid input"),
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"verify clock frame",
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)
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}
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if frame.PublicKeySignature != nil {
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return errors.Wrap(
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errors.New("invalid input"),
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"verify clock frame",
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)
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}
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if len(frame.Input) != 516 {
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return errors.Wrap(
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errors.New("invalid input"),
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"verify clock frame",
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)
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}
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b := sha3.Sum256(input)
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v := vdf.New(frame.Difficulty, b)
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proof := [516]byte{}
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copy(proof[:], frame.Output)
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if !v.Verify(proof) {
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w.logger.Error("invalid proof",
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zap.Binary("filter", frame.Filter),
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.Uint32("difficulty", frame.Difficulty),
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zap.Binary("frame_input", frame.Input),
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zap.Binary("frame_output", frame.Output),
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)
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return errors.Wrap(
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errors.New("invalid proof"),
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"verify clock frame",
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)
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}
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previousSelectorBytes := [516]byte{}
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copy(previousSelectorBytes[:], frame.Input[:516])
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parent, err := poseidon.HashBytes(previousSelectorBytes[:])
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if err != nil {
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return errors.Wrap(err, "verify clock frame")
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}
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selector := new(big.Int).SetBytes(frame.ParentSelector)
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if parent.Cmp(selector) != 0 {
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return errors.Wrap(
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errors.New("selector did not match input"),
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"verify clock frame",
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)
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}
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return nil
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}
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func (w *WesolowskiFrameProver) CreateMasterGenesisFrame(
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filter []byte,
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seed []byte,
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difficulty uint32,
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) (
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*protobufs.ClockFrame,
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error,
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) {
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b := sha3.Sum256(seed)
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v := vdf.New(difficulty, b)
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v.Execute()
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o := v.GetOutput()
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inputMessage := o[:]
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w.logger.Debug("proving genesis frame")
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input := []byte{}
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input = append(input, filter...)
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input = binary.BigEndian.AppendUint64(input, 0)
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input = binary.BigEndian.AppendUint32(input, difficulty)
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if bytes.Equal(seed, []byte{0x00}) {
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value := [516]byte{}
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input = append(input, value[:]...)
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} else {
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input = append(input, seed...)
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}
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b = sha3.Sum256(input)
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v = vdf.New(difficulty, b)
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v.Execute()
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o = v.GetOutput()
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frame := &protobufs.ClockFrame{
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Filter: filter,
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FrameNumber: 0,
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Timestamp: 0,
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Difficulty: difficulty,
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Input: inputMessage,
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Output: o[:],
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ParentSelector: []byte{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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},
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AggregateProofs: []*protobufs.InclusionAggregateProof{},
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PublicKeySignature: nil,
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}
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return frame, nil
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}
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func (w *WesolowskiFrameProver) ProveDataClockFrame(
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previousFrame *protobufs.ClockFrame,
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commitments [][]byte,
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aggregateProofs []*protobufs.InclusionAggregateProof,
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provingKey crypto.Signer,
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timestamp int64,
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difficulty uint32,
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) (*protobufs.ClockFrame, error) {
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var pubkey []byte
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pubkeyType := keys.KeyTypeEd448
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ed448PublicKey, ok := provingKey.Public().(ed448.PublicKey)
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if ok {
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pubkey = []byte(ed448PublicKey)
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} else {
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return nil, errors.Wrap(
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errors.New("no valid signature provided"),
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"prove clock frame",
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)
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}
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h, err := poseidon.HashBytes(pubkey)
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if err != nil {
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return nil, errors.Wrap(
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errors.New("could not hash proving key"),
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"prove clock frame",
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)
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}
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address := h.Bytes()
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input := []byte{}
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input = append(input, previousFrame.Filter...)
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input = binary.BigEndian.AppendUint64(input, previousFrame.FrameNumber+1)
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input = binary.BigEndian.AppendUint64(input, uint64(timestamp))
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input = binary.BigEndian.AppendUint32(input, difficulty)
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input = append(input, address...)
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input = append(input, previousFrame.Output[:]...)
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commitmentInput := []byte{}
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for _, commitment := range commitments {
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commitmentInput = append(commitmentInput, commitment...)
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}
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input = append(input, commitmentInput...)
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b := sha3.Sum256(input)
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v := vdf.New(difficulty, b)
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v.Execute()
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o := v.GetOutput()
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// TODO: make this configurable for signing algorithms that allow
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// user-supplied hash functions
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signature, err := provingKey.Sign(
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rand.Reader,
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append(append([]byte{}, b[:]...), o[:]...),
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crypto.Hash(0),
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)
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if err != nil {
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return nil, errors.Wrap(
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err,
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"prove",
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)
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}
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previousSelectorBytes := [516]byte{}
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copy(previousSelectorBytes[:], previousFrame.Output[:516])
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parent, err := poseidon.HashBytes(previousSelectorBytes[:])
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if err != nil {
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return nil, errors.Wrap(err, "prove clock frame")
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}
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frame := &protobufs.ClockFrame{
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Filter: previousFrame.Filter,
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FrameNumber: previousFrame.FrameNumber + 1,
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Timestamp: timestamp,
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Difficulty: difficulty,
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ParentSelector: parent.Bytes(),
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Input: append(
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append([]byte{}, previousFrame.Output...),
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commitmentInput...,
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),
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AggregateProofs: aggregateProofs,
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Output: o[:],
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}
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switch pubkeyType {
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case keys.KeyTypeEd448:
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frame.PublicKeySignature = &protobufs.ClockFrame_PublicKeySignatureEd448{
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PublicKeySignatureEd448: &protobufs.Ed448Signature{
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Signature: signature,
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PublicKey: &protobufs.Ed448PublicKey{
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KeyValue: pubkey,
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},
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},
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}
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default:
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return nil, errors.Wrap(
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errors.New("unsupported proving key"),
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"prove clock frame",
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)
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}
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return frame, nil
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}
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func (w *WesolowskiFrameProver) CreateDataGenesisFrame(
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filter []byte,
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origin []byte,
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difficulty uint32,
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inclusionProof *InclusionAggregateProof,
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proverKeys [][]byte,
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preDusk bool,
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) (*protobufs.ClockFrame, *tries.RollingFrecencyCritbitTrie, error) {
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frameProverTrie := &tries.RollingFrecencyCritbitTrie{}
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for _, s := range proverKeys {
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addr, err := poseidon.HashBytes(s)
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if err != nil {
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panic(err)
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}
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addrBytes := addr.Bytes()
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addrBytes = append(make([]byte, 32-len(addrBytes)), addrBytes...)
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frameProverTrie.Add(addrBytes, 0)
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}
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w.logger.Info("proving genesis frame")
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input := []byte{}
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input = append(input, filter...)
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input = binary.BigEndian.AppendUint64(input, 0)
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input = binary.BigEndian.AppendUint64(input, 0)
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input = binary.BigEndian.AppendUint32(input, difficulty)
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input = append(input, origin...)
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if !preDusk {
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input = append(input, inclusionProof.AggregateCommitment...)
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}
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b := sha3.Sum256(input)
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v := vdf.New(difficulty, b)
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v.Execute()
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o := v.GetOutput()
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commitments := []*protobufs.InclusionCommitment{}
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for i, commit := range inclusionProof.InclusionCommitments {
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commitments = append(commitments, &protobufs.InclusionCommitment{
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Filter: filter,
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FrameNumber: 0,
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Position: uint32(i),
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TypeUrl: commit.TypeUrl,
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Data: commit.Data,
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Commitment: commit.Commitment,
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})
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}
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frame := &protobufs.ClockFrame{
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Filter: filter,
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FrameNumber: 0,
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Timestamp: 0,
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Difficulty: difficulty,
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Input: append(
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append([]byte{}, origin...),
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inclusionProof.AggregateCommitment...,
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),
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Output: o[:],
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ParentSelector: []byte{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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},
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AggregateProofs: []*protobufs.InclusionAggregateProof{
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{
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Filter: filter,
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FrameNumber: 0,
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InclusionCommitments: commitments,
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Proof: inclusionProof.Proof,
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},
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},
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PublicKeySignature: nil,
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}
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return frame, frameProverTrie, nil
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}
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func (w *WesolowskiFrameProver) VerifyDataClockFrame(
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frame *protobufs.ClockFrame,
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) error {
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var pubkey []byte
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var signature []byte
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pubkeyType := keys.KeyTypeEd448
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ed448PublicKey := frame.GetPublicKeySignatureEd448()
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if ed448PublicKey != nil {
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pubkey = ed448PublicKey.PublicKey.KeyValue
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signature = ed448PublicKey.Signature
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} else {
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return errors.Wrap(
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errors.New("no valid signature provided"),
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"verify clock frame",
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)
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}
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h, err := poseidon.HashBytes(pubkey)
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if err != nil {
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return errors.Wrap(
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errors.New("could not hash proving key"),
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"verify clock frame",
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)
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}
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address := h.Bytes()
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input := []byte{}
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input = append(input, frame.Filter...)
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input = binary.BigEndian.AppendUint64(input, frame.FrameNumber)
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input = binary.BigEndian.AppendUint64(input, uint64(frame.Timestamp))
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input = binary.BigEndian.AppendUint32(input, frame.Difficulty)
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input = append(input, address...)
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input = append(input, frame.Input...)
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if len(frame.Input) < 516 {
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return errors.Wrap(
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errors.New("invalid input"),
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"verify clock frame",
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)
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}
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b := sha3.Sum256(input)
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v := vdf.New(frame.Difficulty, b)
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proof := [516]byte{}
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copy(proof[:], frame.Output)
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// TODO: make this configurable for signing algorithms that allow
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// user-supplied hash functions
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switch pubkeyType {
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case keys.KeyTypeEd448:
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if len(pubkey) != 57 || len(signature) != 114 || !ed448.VerifyAny(
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pubkey,
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append(append([]byte{}, b[:]...), frame.Output...),
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signature,
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crypto.Hash(0),
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) {
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return errors.Wrap(
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errors.New("invalid signature for issuer"),
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"verify clock frame",
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)
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}
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}
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if !v.Verify(proof) {
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return errors.Wrap(
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errors.New("invalid proof"),
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"verify clock frame",
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)
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}
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previousSelectorBytes := [516]byte{}
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copy(previousSelectorBytes[:], frame.Input[:516])
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parent, err := poseidon.HashBytes(previousSelectorBytes[:])
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if err != nil {
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return errors.Wrap(err, "verify clock frame")
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}
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selector := new(big.Int).SetBytes(frame.ParentSelector)
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if parent.Cmp(selector) != 0 {
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return errors.Wrap(
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errors.New("selector did not match input"),
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"verify clock frame",
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)
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}
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return nil
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}
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