1 files changed, 0 insertions, 376 deletions
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go
deleted file mode 100644
index 42ee6122e..000000000
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go
+++ /dev/null
@@ -1,376 +0,0 @@
-// Copyright 2018 The dexon-consensus Authors
-// This file is part of the dexon-consensus library.
-//
-// The dexon-consensus library is free software: you can redistribute it
-// and/or modify it under the terms of the GNU Lesser General Public License as
-// published by the Free Software Foundation, either version 3 of the License,
-// or (at your option) any later version.
-//
-// The dexon-consensus library is distributed in the hope that it will be
-// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
-// General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the dexon-consensus library. If not, see
-// <http://www.gnu.org/licenses/>.
-
-package utils
-
-import (
-	"bytes"
-	"encoding/binary"
-
-	"github.com/dexon-foundation/dexon-consensus/common"
-	"github.com/dexon-foundation/dexon-consensus/core/crypto"
-	"github.com/dexon-foundation/dexon-consensus/core/types"
-	typesDKG "github.com/dexon-foundation/dexon-consensus/core/types/dkg"
-)
-
-func hashWitness(witness *types.Witness) (common.Hash, error) {
-	binaryHeight := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryHeight, witness.Height)
-	return crypto.Keccak256Hash(
-		binaryHeight,
-		witness.Data), nil
-}
-
-// HashBlock generates hash of a types.Block.
-func HashBlock(block *types.Block) (common.Hash, error) {
-	hashPosition := HashPosition(block.Position)
-	binaryTimestamp, err := block.Timestamp.UTC().MarshalBinary()
-	if err != nil {
-		return common.Hash{}, err
-	}
-	binaryWitness, err := hashWitness(&block.Witness)
-	if err != nil {
-		return common.Hash{}, err
-	}
-
-	hash := crypto.Keccak256Hash(
-		block.ProposerID.Hash[:],
-		block.ParentHash[:],
-		hashPosition[:],
-		binaryTimestamp[:],
-		block.PayloadHash[:],
-		binaryWitness[:])
-	return hash, nil
-}
-
-// VerifyBlockSignature verifies the signature of types.Block.
-func VerifyBlockSignature(b *types.Block) (err error) {
-	payloadHash := crypto.Keccak256Hash(b.Payload)
-	if payloadHash != b.PayloadHash {
-		err = ErrIncorrectHash
-		return
-	}
-	return VerifyBlockSignatureWithoutPayload(b)
-}
-
-// VerifyBlockSignatureWithoutPayload verifies the signature of types.Block but
-// does not check if PayloadHash is correct.
-func VerifyBlockSignatureWithoutPayload(b *types.Block) (err error) {
-	hash, err := HashBlock(b)
-	if err != nil {
-		return
-	}
-	if hash != b.Hash {
-		err = ErrIncorrectHash
-		return
-	}
-	pubKey, err := crypto.SigToPub(b.Hash, b.Signature)
-	if err != nil {
-		return
-	}
-	if !b.ProposerID.Equal(types.NewNodeID(pubKey)) {
-		err = ErrIncorrectSignature
-		return
-	}
-	return
-
-}
-
-// HashVote generates hash of a types.Vote.
-func HashVote(vote *types.Vote) common.Hash {
-	binaryPeriod := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryPeriod, vote.Period)
-
-	hashPosition := HashPosition(vote.Position)
-
-	hash := crypto.Keccak256Hash(
-		vote.ProposerID.Hash[:],
-		vote.BlockHash[:],
-		binaryPeriod,
-		hashPosition[:],
-		vote.PartialSignature.Signature[:],
-		[]byte{byte(vote.Type)},
-	)
-	return hash
-}
-
-// VerifyVoteSignature verifies the signature of types.Vote.
-func VerifyVoteSignature(vote *types.Vote) (bool, error) {
-	hash := HashVote(vote)
-	pubKey, err := crypto.SigToPub(hash, vote.Signature)
-	if err != nil {
-		return false, err
-	}
-	if vote.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-func hashCRS(block *types.Block, crs common.Hash) common.Hash {
-	hashPos := HashPosition(block.Position)
-	if block.Position.Round < dkgDelayRound {
-		return crypto.Keccak256Hash(crs[:], hashPos[:], block.ProposerID.Hash[:])
-	}
-	return crypto.Keccak256Hash(crs[:], hashPos[:])
-}
-
-// VerifyCRSSignature verifies the CRS signature of types.Block.
-func VerifyCRSSignature(
-	block *types.Block, crs common.Hash, npks *typesDKG.NodePublicKeys) bool {
-	hash := hashCRS(block, crs)
-	if block.Position.Round < dkgDelayRound {
-		return bytes.Compare(block.CRSSignature.Signature[:], hash[:]) == 0
-	}
-	if npks == nil {
-		return false
-	}
-	pubKey, exist := npks.PublicKeys[block.ProposerID]
-	if !exist {
-		return false
-	}
-	return pubKey.VerifySignature(hash, block.CRSSignature)
-}
-
-// HashPosition generates hash of a types.Position.
-func HashPosition(position types.Position) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, position.Round)
-
-	binaryHeight := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryHeight, position.Height)
-
-	return crypto.Keccak256Hash(
-		binaryRound,
-		binaryHeight,
-	)
-}
-
-func hashDKGPrivateShare(prvShare *typesDKG.PrivateShare) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, prvShare.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, prvShare.Reset)
-
-	return crypto.Keccak256Hash(
-		prvShare.ProposerID.Hash[:],
-		prvShare.ReceiverID.Hash[:],
-		binaryRound,
-		binaryReset,
-		prvShare.PrivateShare.Bytes(),
-	)
-}
-
-// VerifyDKGPrivateShareSignature verifies the signature of
-// typesDKG.PrivateShare.
-func VerifyDKGPrivateShareSignature(
-	prvShare *typesDKG.PrivateShare) (bool, error) {
-	hash := hashDKGPrivateShare(prvShare)
-	pubKey, err := crypto.SigToPub(hash, prvShare.Signature)
-	if err != nil {
-		return false, err
-	}
-	if prvShare.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-func hashDKGMasterPublicKey(mpk *typesDKG.MasterPublicKey) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, mpk.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, mpk.Reset)
-
-	return crypto.Keccak256Hash(
-		mpk.ProposerID.Hash[:],
-		mpk.DKGID.GetLittleEndian(),
-		mpk.PublicKeyShares.MasterKeyBytes(),
-		binaryRound,
-		binaryReset,
-	)
-}
-
-// VerifyDKGMasterPublicKeySignature verifies DKGMasterPublicKey signature.
-func VerifyDKGMasterPublicKeySignature(
-	mpk *typesDKG.MasterPublicKey) (bool, error) {
-	hash := hashDKGMasterPublicKey(mpk)
-	pubKey, err := crypto.SigToPub(hash, mpk.Signature)
-	if err != nil {
-		return false, err
-	}
-	if mpk.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-func hashDKGComplaint(complaint *typesDKG.Complaint) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, complaint.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, complaint.Reset)
-
-	hashPrvShare := hashDKGPrivateShare(&complaint.PrivateShare)
-
-	return crypto.Keccak256Hash(
-		complaint.ProposerID.Hash[:],
-		binaryRound,
-		binaryReset,
-		hashPrvShare[:],
-	)
-}
-
-// VerifyDKGComplaintSignature verifies DKGCompliant signature.
-func VerifyDKGComplaintSignature(
-	complaint *typesDKG.Complaint) (bool, error) {
-	if complaint.Round != complaint.PrivateShare.Round {
-		return false, nil
-	}
-	if complaint.Reset != complaint.PrivateShare.Reset {
-		return false, nil
-	}
-	hash := hashDKGComplaint(complaint)
-	pubKey, err := crypto.SigToPub(hash, complaint.Signature)
-	if err != nil {
-		return false, err
-	}
-	if complaint.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	if !complaint.IsNack() {
-		return VerifyDKGPrivateShareSignature(&complaint.PrivateShare)
-	}
-	return true, nil
-}
-
-func hashDKGPartialSignature(psig *typesDKG.PartialSignature) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, psig.Round)
-
-	return crypto.Keccak256Hash(
-		psig.ProposerID.Hash[:],
-		binaryRound,
-		psig.Hash[:],
-		psig.PartialSignature.Signature[:],
-	)
-}
-
-// VerifyDKGPartialSignatureSignature verifies the signature of
-// typesDKG.PartialSignature.
-func VerifyDKGPartialSignatureSignature(
-	psig *typesDKG.PartialSignature) (bool, error) {
-	hash := hashDKGPartialSignature(psig)
-	pubKey, err := crypto.SigToPub(hash, psig.Signature)
-	if err != nil {
-		return false, err
-	}
-	if psig.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-func hashDKGMPKReady(ready *typesDKG.MPKReady) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, ready.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, ready.Reset)
-
-	return crypto.Keccak256Hash(
-		ready.ProposerID.Hash[:],
-		binaryRound,
-		binaryReset,
-	)
-}
-
-// VerifyDKGMPKReadySignature verifies DKGMPKReady signature.
-func VerifyDKGMPKReadySignature(
-	ready *typesDKG.MPKReady) (bool, error) {
-	hash := hashDKGMPKReady(ready)
-	pubKey, err := crypto.SigToPub(hash, ready.Signature)
-	if err != nil {
-		return false, err
-	}
-	if ready.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-func hashDKGFinalize(final *typesDKG.Finalize) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, final.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, final.Reset)
-
-	return crypto.Keccak256Hash(
-		final.ProposerID.Hash[:],
-		binaryRound,
-		binaryReset,
-	)
-}
-
-func hashDKGSuccess(success *typesDKG.Success) common.Hash {
-	binaryRound := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryRound, success.Round)
-	binaryReset := make([]byte, 8)
-	binary.LittleEndian.PutUint64(binaryReset, success.Reset)
-
-	return crypto.Keccak256Hash(
-		success.ProposerID.Hash[:],
-		binaryRound,
-		binaryReset,
-	)
-}
-
-// VerifyDKGFinalizeSignature verifies DKGFinalize signature.
-func VerifyDKGFinalizeSignature(
-	final *typesDKG.Finalize) (bool, error) {
-	hash := hashDKGFinalize(final)
-	pubKey, err := crypto.SigToPub(hash, final.Signature)
-	if err != nil {
-		return false, err
-	}
-	if final.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-// VerifyDKGSuccessSignature verifies DKGSuccess signature.
-func VerifyDKGSuccessSignature(
-	success *typesDKG.Success) (bool, error) {
-	hash := hashDKGSuccess(success)
-	pubKey, err := crypto.SigToPub(hash, success.Signature)
-	if err != nil {
-		return false, err
-	}
-	if success.ProposerID != types.NewNodeID(pubKey) {
-		return false, nil
-	}
-	return true, nil
-}
-
-// Rehash hashes the hash again and again and again...
-func Rehash(hash common.Hash, count uint) common.Hash {
-	result := hash
-	for i := uint(0); i < count; i++ {
-		result = crypto.Keccak256Hash(result[:])
-	}
-	return result
-}