112 lines
3.1 KiB
Go
112 lines
3.1 KiB
Go
// Copyright 2017 AMIS Technologies
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package container
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import (
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"crypto/ecdsa"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/istanbul"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/crypto/sha3"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/getamis/istanbul-tools/cmd/istanbul/extradata"
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uuid "github.com/satori/go.uuid"
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)
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const (
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defaultLocalDir = "/tmp/gdata"
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clientIdentifier = "geth"
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nodekeyFileName = "nodekey"
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)
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func generateRandomDir() (string, error) {
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err := os.MkdirAll(filepath.Join(defaultLocalDir), 0700)
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if err != nil {
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log.Fatal(err)
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}
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instanceDir := filepath.Join(defaultLocalDir, fmt.Sprintf("%s-%s", clientIdentifier, uuid.NewV4().String()))
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if err := os.MkdirAll(instanceDir, 0700); err != nil {
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log.Println(fmt.Sprintf("Failed to create instance dir: %v", err))
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return "", err
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}
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return instanceDir, nil
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}
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func generateKeys(num int) (keys []*ecdsa.PrivateKey, addrs []common.Address) {
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for i := 0; i < num; i++ {
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key, err := crypto.GenerateKey()
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if err != nil {
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log.Fatalf("couldn't generate key: " + err.Error())
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}
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keys = append(keys, key)
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addr := crypto.PubkeyToAddress(key.PublicKey)
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addrs = append(addrs, addr)
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}
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return keys, addrs
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}
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func saveNodeKey(key *ecdsa.PrivateKey, dataDir string) error {
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keyDir := filepath.Join(dataDir, clientIdentifier)
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if err := os.MkdirAll(keyDir, 0700); err != nil {
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log.Println(fmt.Sprintf("Failed to create key dir: %v", err))
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return err
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}
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keyfile := filepath.Join(keyDir, nodekeyFileName)
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if err := crypto.SaveECDSA(keyfile, key); err != nil {
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log.Println(fmt.Sprintf("Failed to persist node key: %v", err))
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return err
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}
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return nil
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}
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func sigHash(header *types.Header) (hash common.Hash) {
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hasher := sha3.NewKeccak256()
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// Clean seal is required for calculating proposer seal.
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rlp.Encode(hasher, types.IstanbulFilteredHeader(header, false))
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hasher.Sum(hash[:0])
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return hash
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}
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func GetProposer(header *types.Header) common.Address {
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if header == nil {
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return common.Address{}
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}
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_, istanbulExtra, err := extradata.Decode(common.ToHex(header.Extra))
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if err != nil {
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return common.Address{}
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}
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addr, err := istanbul.GetSignatureAddress(sigHash(header).Bytes(), istanbulExtra.Seal)
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if err != nil {
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return common.Address{}
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}
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return addr
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}
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