// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core 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-core 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-core library. If not, see
// <http://www.gnu.org/licenses/>.
package core
import (
"testing"
"time"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/dexon-foundation/dexon-consensus-core/crypto"
"github.com/dexon-foundation/dexon-consensus-core/crypto/eth"
"github.com/stretchr/testify/suite"
)
type CryptoTestSuite struct {
suite.Suite
}
var myVID = types.ValidatorID{Hash: common.NewRandomHash()}
type simpleBlock struct {
block *types.Block
}
func (sb *simpleBlock) Block() *types.Block {
return sb.block
}
func (sb *simpleBlock) Payloads() [][]byte {
return [][]byte{}
}
func (sb *simpleBlock) SetBlock(block *types.Block) {
*sb.block = *block
}
func (s *CryptoTestSuite) prepareBlock(prevBlock *types.Block) *types.Block {
acks := make(map[common.Hash]struct{})
timestamps := make(map[types.ValidatorID]time.Time)
timestamps[myVID] = time.Now().UTC()
if prevBlock == nil {
return &types.Block{
Acks: acks,
Timestamps: timestamps,
ConsensusInfo: types.ConsensusInfo{
Timestamp: time.Now(),
Height: 0,
},
}
}
parentHash, err := hashCompactionChainAck(prevBlock)
s.Require().Nil(err)
s.Require().NotEqual(prevBlock.Hash, common.Hash{})
acks[parentHash] = struct{}{}
return &types.Block{
ParentHash: prevBlock.Hash,
Acks: acks,
Timestamps: timestamps,
ConsensusInfoParentHash: parentHash,
Height: prevBlock.Height + 1,
CompactionChainAck: types.CompactionChainAck{
AckingBlockHash: prevBlock.Hash,
},
ConsensusInfo: types.ConsensusInfo{
Timestamp: time.Now(),
Height: prevBlock.ConsensusInfo.Height + 1,
},
}
}
func (s *CryptoTestSuite) newBlock(prevBlock *types.Block) *types.Block {
block := s.prepareBlock(prevBlock)
var err error
block.Hash, err = hashBlock(&simpleBlock{block: block})
s.Require().Nil(err)
return block
}
func (s *CryptoTestSuite) generateCompactionChain(
length int, prv crypto.PrivateKey) []*types.Block {
blocks := make([]*types.Block, length)
var prevBlock *types.Block
for idx := range blocks {
block := s.newBlock(prevBlock)
prevBlock = block
blocks[idx] = block
var err error
if idx > 0 {
block.ConsensusInfoParentHash, err = hashCompactionChainAck(blocks[idx-1])
s.Require().Nil(err)
block.CompactionChainAck.ConsensusSignature, err =
signCompactionChainAck(blocks[idx-1], prv)
s.Require().Nil(err)
}
}
return blocks
}
func (s *CryptoTestSuite) TestCompactionChainAckSignature() {
prv, err := eth.NewPrivateKey()
pub := prv.PublicKey()
s.Require().Nil(err)
blocks := s.generateCompactionChain(10, prv)
blockMap := make(map[common.Hash]*types.Block)
for _, block := range blocks {
blockMap[block.Hash] = block
}
for _, block := range blocks {
if block.ConsensusInfo.Height == 0 {
continue
}
ackingBlock, exist := blockMap[block.CompactionChainAck.AckingBlockHash]
s.Require().True(exist)
s.True(ackingBlock.ConsensusInfo.Height == block.ConsensusInfo.Height-1)
hash, err := hashCompactionChainAck(ackingBlock)
s.Require().Nil(err)
s.Equal(hash, block.ConsensusInfoParentHash)
s.True(verifyCompactionChainAckSignature(
pub, ackingBlock, block.CompactionChainAck.ConsensusSignature))
}
// Modify Block.ConsensusTime and verify signature again.
for _, block := range blocks {
block.ConsensusInfo.Timestamp = time.Time{}
if block.ConsensusInfo.Height == 0 {
continue
}
ackingBlock, exist := blockMap[block.CompactionChainAck.AckingBlockHash]
s.Require().True(exist)
s.False(verifyCompactionChainAckSignature(
pub, ackingBlock, block.CompactionChainAck.ConsensusSignature))
}
}
func (s *CryptoTestSuite) generateBlockChain(
length int, prv crypto.PrivateKey) []*types.Block {
blocks := make([]*types.Block, length)
var prevBlock *types.Block
for idx := range blocks {
block := s.newBlock(prevBlock)
blocks[idx] = block
var err error
block.Signature, err = prv.Sign(block.Hash)
s.Require().Nil(err)
}
return blocks
}
func (s *CryptoTestSuite) TestBlockSignature() {
prv, err := eth.NewPrivateKey()
pub := prv.PublicKey()
s.Require().Nil(err)
blocks := s.generateBlockChain(10, prv)
blockMap := make(map[common.Hash]*types.Block)
for _, block := range blocks {
blockMap[block.Hash] = block
}
for _, block := range blocks {
if !block.IsGenesis() {
parentBlock, exist := blockMap[block.ParentHash]
s.Require().True(exist)
s.True(parentBlock.Height == block.Height-1)
hash, err := hashBlock(&simpleBlock{block: parentBlock})
s.Require().Nil(err)
s.Equal(hash, block.ParentHash)
}
s.True(verifyBlockSignature(pub, &simpleBlock{block: block}, block.Signature))
}
// Modify Block.Acks and verify signature again.
for _, block := range blocks {
block.Acks[common.NewRandomHash()] = struct{}{}
s.False(verifyBlockSignature(
pub, &simpleBlock{block: block}, block.Signature))
}
}
func TestCrypto(t *testing.T) {
suite.Run(t, new(CryptoTestSuite))
}
