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owtp.go
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owtp.go
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/*
* Copyright 2018 The openwallet Authors
* This file is part of the openwallet library.
*
* The openwallet 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 openwallet 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.
*/
// owtp全称OpenWallet Transfer Protocol,OpenWallet的一种点对点的分布式私有通信协议。
package owtp
import (
"encoding/json"
"errors"
"fmt"
"github.com/blocktree/openwallet/log"
"github.com/bwmarrin/snowflake"
"github.com/mr-tron/base58/base58"
"math/rand"
"strings"
"sync"
"time"
)
type ConnectType int
const (
//成功标识
StatusSuccess uint64 = 200
//客户端请求错误
ErrBadRequest uint64 = 400
//网络断开
ErrUnauthorized uint64 = 401
//通信密钥不正确
ErrSecretKeyInvalid uint64 = 402
//找不到方法
ErrNotFoundMethod uint64 = 404
//重放攻击
ErrReplayAttack uint64 = 409
//请求超时
ErrRequestTimeout uint64 = 408
//网络断开
ErrNetworkDisconnected uint64 = 430
//服务器错误
ErrInternalServerError uint64 = 500
//请求与响应的方法不一致
ErrResponseMethodDiffer uint64 = 501
//协商失败
ErrKeyAgreementFailed uint64 = 502
//拒绝服务
ErrDenialOfService uint64 = 503
//60X: 自定义错误
ErrCustomError uint64 = 600
)
//连接方式
const (
Websocket string = "ws"
MQ string = "mq"
HTTP string = "http"
)
//内置方法
const (
//校验协商结果
KeyAgreementMethod = "internal_keyAgreement"
//准备前执行的方
PrepareMethod = "internal_prepare"
//结束时执行的方法
FinishMethod = "internal_finish"
//内置缓存主健关键字
keyAgreementCipher = "internal_key_keyAgreementCipher"
)
var (
Debug = false
)
//节点主配置 作为json解析工具
type ConnectConfig struct {
Address string `json:"address"` //@required 连接IP地址
ConnectType string `json:"connectType"` //@required 连接方式
EnableSignature bool `json:"enableSignature"` //是否开启owtp协议内签名,防重放
Account string `json:"account"` //mq账户名
Password string `json:"password"` //mq账户密码
Exchange string `json:"exchange"` //mq需要字段
WriteQueueName string `json:"writeQueueName"` //mq写入通道名
ReadQueueName string `json:"readQueueName"` //mq读取通道名
EnableSSL bool `json:"enableSSL"` //是否开启链接SSL,https,wss
ReadBufferSize int `json:"readBufferSize"` //socket读取缓存
WriteBufferSize int `json:"writeBufferSize"` //socket写入缓存
EnableKeyAgreement bool `json:"enableKeyAgreement"` //是否开启协商密码
}
//节点主配置 作为json解析工具
type NodeConfig struct {
TimeoutSEC int `json:"timeoutSEC"` //超时时间
Cert Certificate `json:"cert"` //证书
Peerstore Peerstore //会话缓存
}
//OWTPNode 实现OWTP协议的节点
type OWTPNode struct {
//nonce生成器
nonceGen *snowflake.Node
//缓存文件
cacheFile string
//默认路由
serveMux *ServeMux
//是否监听连接中
//listening bool
//节点运行中
running bool
//读写锁
mu sync.RWMutex
//关闭连接时的回调
disconnectHandler func(n *OWTPNode, peerInfo PeerInfo)
//连接时的回调
connectHandler func(n *OWTPNode, peerInfo PeerInfo)
//节点存储器
peerstore Peerstore
//在线节点
onlinePeers map[string]Peer
//服务监听器
//listener Listener
//服务监听器
listeners map[string]Listener
//授权证书
cert Certificate
//Broadcast chan BroadcastMessage
Join chan Peer
Leave chan Peer
Stop chan struct{}
//请求超时(秒)
timeoutSEC int
//通道的读写缓存大小
//ReadBufferSize, WriteBufferSize int
}
//RandomOWTPNode 创建随机密钥节点
func RandomOWTPNode(consultType ...string) *OWTPNode {
c := ""
if len(consultType) > 0 {
c = consultType[0]
}
cert, err := NewCertificate(RandomPrivateKey(), c)
if err != nil {
return nil
}
config := NodeConfig{
Cert: cert,
}
node := NewNode(config)
return node
}
//NewNode 创建OWTP协议节点
func NewNode(config NodeConfig) *OWTPNode {
node := &OWTPNode{}
if config.Cert.ID() == "" {
cert, err := NewCertificate(RandomPrivateKey(), "")
if err != nil {
return nil
}
node.cert = cert
} else {
node.cert = config.Cert
}
if config.Peerstore == nil {
node.peerstore = NewOWTPPeerstore()
} else {
node.peerstore = config.Peerstore
}
node.timeoutSEC = config.TimeoutSEC
if node.timeoutSEC == 0 {
node.serveMux = NewServeMux(DefaultTimoutSEC)
} else {
node.serveMux = NewServeMux(node.timeoutSEC)
}
node.nonceGen, _ = snowflake.NewNode(1)
node.Join = make(chan Peer)
node.Leave = make(chan Peer)
node.Stop = make(chan struct{})
node.onlinePeers = make(map[string]Peer)
node.listeners = make(map[string]Listener)
//内部配置一个协商密码处理过程
node.serveMux.handleFuncInner(KeyAgreementMethod, node.keyAgreement)
//马上执行
go node.Run()
return node
}
//NewOWTPNode 创建OWTP协议节点
func NewOWTPNode(cert Certificate, readBufferSize, writeBufferSize int) *OWTPNode {
node := &OWTPNode{}
node.nonceGen, _ = snowflake.NewNode(1)
node.serveMux = NewServeMux(DefaultTimoutSEC)
node.cert = cert
node.peerstore = NewOWTPPeerstore()
//node.ReadBufferSize = readBufferSize
//node.WriteBufferSize = writeBufferSize
node.Join = make(chan Peer)
node.Leave = make(chan Peer)
node.Stop = make(chan struct{})
node.onlinePeers = make(map[string]Peer)
node.listeners = make(map[string]Listener)
//内部配置一个协商密码处理过程
node.serveMux.handleFuncInner(KeyAgreementMethod, node.keyAgreement)
//马上执行
go node.Run()
return node
}
//Certificate 节点证书
func (node *OWTPNode) Certificate() *Certificate {
return &node.cert
}
//NodeID 节点的ID
func (node *OWTPNode) NodeID() string {
return node.cert.ID()
}
//SetPeerstore 设置一个Peerstore指针
func (node *OWTPNode) SetPeerstore(store Peerstore) {
node.peerstore = store
}
//Peerstore 节点存储器
func (node *OWTPNode) Peerstore() Peerstore {
return node.peerstore
}
//Listen 监听TCP地址
func (node *OWTPNode) Listen(config ConnectConfig) error {
addr := config.Address
connectType := config.ConnectType
enableSignature := config.EnableSignature
//log.Debug("enableSignature:", enableSignature)
if _, exist := node.listeners[connectType]; exist {
return fmt.Errorf("the node [%s] is listening, please close listener first", connectType)
}
//if node.listening {
// return fmt.Errorf("the node is listening, please close listener first")
//}
if connectType == Websocket || connectType == MQ {
l, err := WSListenAddr(addr, node.cert, enableSignature, node)
if err != nil {
return err
}
node.listeners[connectType] = l
go func(listener Listener) {
for {
peer, err := listener.Accept()
if err != nil {
return
}
node.Join <- peer
}
}(l)
//node.listening = true
} else if connectType == HTTP {
l, err := HttpListenAddr(addr, enableSignature, node)
if err != nil {
return err
}
node.listeners[connectType] = l
//node.listening = true
}
return nil
}
//listening 是否监听中
func (node *OWTPNode) Listening(connectType string) bool {
_, exist := node.listeners[connectType]
return exist
}
//CloseListener 关闭监听
func (node *OWTPNode) CloseListener(connectType string) {
if l, exist := node.listeners[connectType]; exist {
l.Close()
node.mu.Lock()
delete(node.listeners, connectType)
node.mu.Unlock()
}
}
//Connect 建立长连接
func (node *OWTPNode) Connect(pid string, config ConnectConfig) (Peer, error) {
peer, err := node.connect(pid, config)
if err != nil {
return nil, err
}
//连接配置EnableKeyAgreement = true,进行协商密码
if config.EnableKeyAgreement {
//该节点未开启,首先请求开启协商密码
if peer != nil && peer.auth().EnableKeyAgreement() == false {
log.Debugf("first connect to call KeyAgreement request")
err = node.KeyAgreement(pid, "aes")
if err != nil {
return nil, err
}
}
}
return peer, nil
}
//connect 建立长连接,内部调用
func (node *OWTPNode) connect(pid string, config ConnectConfig) (Peer, error) {
var (
peer Peer
)
addr := config.Address
connectType := config.ConnectType
enableSignature := config.EnableSignature
enableSSL := config.EnableSSL
readBufferSize := config.ReadBufferSize
writeBufferSize := config.WriteBufferSize
timeout := time.Duration(node.timeoutSEC) * time.Second
//检查是否已经连接服务
peer = node.GetOnlinePeer(pid)
if peer != nil && peer.IsConnected() && peer.ConnectConfig().Address != "" {
//如果地址不一致,先关闭节点
if addr != peer.ConnectConfig().Address || connectType != peer.ConnectConfig().ConnectType {
//fmt.Printf("如果地址不一致,先关闭节点 ClosePeer, %s:%s \n",addr,peer.ConnectConfig().Address)
node.ClosePeer(pid)
} else {
//log.Debugf("peer[%s] has connected", peer.PID())
return peer, nil
}
}
if len(addr) == 0 {
return nil, fmt.Errorf("pid: %s, address must contain by config", pid)
}
auth, err := NewOWTPAuthWithCertificate(node.cert, enableSignature)
//发起协商密钥
//err = auth.InitKeyAgreement()
if err != nil {
return nil, err
}
if len(connectType) == 0 {
return nil, fmt.Errorf("connectType must contain by config")
}
//websocket类型
if connectType == Websocket {
protocol := "ws://"
if enableSSL {
protocol = "wss://"
}
url := protocol + strings.TrimSuffix(addr, "/") + "/"
//建立链接,记录默认的客户端
client, err := Dial(pid, url, node, auth.HTTPAuthHeader(), readBufferSize, writeBufferSize)
if err != nil {
return nil, err
}
//设置授权规则
client._auth = auth
//设置配置
client.config = config
peer = client
}
//MQ类型
if connectType == MQ {
mqAccount := config.Account
mqPassword := config.Password
url := "amqp://" + mqAccount + ":" + mqPassword + "@" + strings.TrimSuffix(addr, "/") + "/"
//建立链接,记录默认的客户端
client, err := MQDial(pid, url, node)
if err != nil {
return nil, err
}
//设置授权规则
client._auth = auth
//设置配置
client.config = config
peer = client
}
//HTTP类型
if connectType == HTTP {
protocol := "http://"
if enableSSL {
protocol = "https://"
}
url := protocol + strings.TrimSuffix(addr, "/") + "/"
//建立链接,记录默认的客户端
client, err := HTTPDial(pid, url, node, auth.HTTPAuthHeader(), timeout)
if err != nil {
return nil, err
}
//设置授权规则
client._auth = auth
//设置配置
client.config = config
peer = client
}
if peer == nil {
return nil, errors.New("connectType can't found! ")
}
node.AddOnlinePeer(peer)
return peer, nil
}
//SetCloseHandler 设置关闭连接时的回调
func (node *OWTPNode) SetOpenHandler(h func(n *OWTPNode, peer PeerInfo)) {
node.connectHandler = h
}
//SetCloseHandler 设置关闭连接时的回调
func (node *OWTPNode) SetCloseHandler(h func(n *OWTPNode, peer PeerInfo)) {
node.disconnectHandler = h
}
// Run 运行,go Run运行一条线程
func (node *OWTPNode) Run() error {
defer func() {
node.running = false
}()
if node.running {
return fmt.Errorf("node is running")
}
node.running = true
//开启节点管理运行时
for {
select {
case peer := <-node.Join:
//客户端加入
log.Debug("Node Join:", peer.PID())
log.Debug("Node IP:", peer.RemoteAddr().String())
node.AddOnlinePeer(peer)
node.peerstore.SavePeer(peer) //HTTP可能会无限增加
//加入后打开数据流通道
if err := peer.openPipe(); err != nil {
log.Error("peer:", peer.PID(), "open pipe failed")
continue
}
if node.connectHandler != nil {
go node.connectHandler(node, node.Peerstore().PeerInfo(peer.PID()))
}
case peer := <-node.Leave:
//客户端离开
log.Debug("Node Leave:", peer.PID())
node.serveMux.ResetRequestQueue(peer.PID())
node.RemoveOfflinePeer(peer.PID())
if node.disconnectHandler != nil {
go node.disconnectHandler(node, node.Peerstore().PeerInfo(peer.PID()))
}
case <-node.Stop:
return nil
//case m := <-p.Broadcast:
// //推送消息给客户端
// beego.Debug("推送消息给客户端:", m)
// p.broadcastMessage(m)
// break
}
log.Debug("Total Nodes:", len(node.onlinePeers))
}
return nil
}
//IsConnectPeer 是否连接某个节点
func (node *OWTPNode) IsConnectPeer(pid string) bool {
peer := node.GetOnlinePeer(pid)
if peer == nil {
return false
}
return peer.IsConnected()
}
//ClosePeer 断开连接节点
func (node *OWTPNode) ClosePeer(pid string) {
//检查是否已经连接服务
peer := node.GetOnlinePeer(pid)
if peer == nil {
return
}
peer.close()
}
//Close 关闭节点
func (node *OWTPNode) Close() {
for _, listener := range node.listeners {
listener.Close()
}
//fmt.Printf("node close: %s\n", node.NodeID())
//中断所有客户端连接
for _, peer := range node.OnlinePeers() {
peer.close()
node.serveMux.ResetRequestQueue(peer.PID())
}
//通知停止运行
node.Stop <- struct{}{}
//node.client.close()
}
//ConnectAndCall 通过连接配置并直接请求,如果节点在线使用当前连接请求
func (node *OWTPNode) ConnectAndCall(
pid string,
config ConnectConfig,
method string,
params interface{},
sync bool,
reqFunc RequestFunc) error {
if sync {
peer, err := node.Connect(pid, config) //重新连接
if err != nil {
return err
}
return node.Call(peer.PID(), method, params, sync, reqFunc)
} else {
go func() {
peer, err := node.Connect(pid, config) //重新连接
if err != nil {
return
}
node.Call(peer.PID(), method, params, sync, reqFunc)
}()
return nil
}
}
//CallSync 同步请求
func (node *OWTPNode) CallSync(
pid string,
method string,
params interface{},
) (*Response, error) {
var (
err error
respChan = make(chan Response, 1)
)
err = node.Call(pid, method, params, true, func(resp Response) {
respChan <- resp
})
if err != nil {
return nil, err
}
response := <-respChan
return &response, nil
}
//Call 向对方节点进行调用
func (node *OWTPNode) Call(
pid string,
method string,
params interface{},
sync bool,
reqFunc RequestFunc) error {
var (
err error
respChan = make(chan Response)
)
//检查是否已经连接服务
peer := node.GetOnlinePeer(pid)
if peer == nil {
peerInfo := node.peerstore.PeerInfo(pid)
peer, err = node.Connect(pid, peerInfo.Config) //重新连接
if err != nil {
return err
}
}
//添加请求队列到Map,处理完成回调方法
nonce := uint64(node.nonceGen.Generate().Int64())
time := time.Now().Unix()
//封装数据包
packet := DataPacket{
Method: method,
Req: WSRequest,
Nonce: nonce,
Timestamp: time,
Data: params,
Version: CurrentDataPacketVersion,
}
//如果开启了协商密码,添加协商密码参数
if peer.auth() != nil && peer.auth().EnableKeyAgreement() {
value := node.Peerstore().Get(peer.PID(), keyAgreementCipher)
if value == nil {
return fmt.Errorf("keyAgreement is enabled, but cipher is empty")
}
ka, ok := value.(*KeyAgreement)
if !ok {
return fmt.Errorf("keyAgreement is enabled, type error")
}
//加密数据
err = node.encryptPacket(peer, &packet, ka.Key)
if err != nil {
return err
}
packet.SecretData = SecretData{
PublicKeyInitiator: ka.PublicKeyInitiator,
TmpPublicKeyInitiator: ka.TmpPublicKeyInitiator,
EncryptType: ka.EncryptType,
}
if peer.IsHost() {
//对方是服务端
packet.SecretData.SA = ka.SA
} else {
//对方是客户端
packet.SecretData.S2 = ka.S2
}
}
if peer.auth() != nil && !peer.auth().GenerateSignature(&packet) {
return errors.New("OWTP: authorization failed")
}
//添加请求到队列,异步或同步等待结果,应该在发送前就添加请求,如果发送失败,删除请求
err = node.serveMux.AddRequest(peer, nonce, time, method, reqFunc, respChan, sync)
if err != nil {
return err
}
//向节点发送请求
err = peer.send(packet)
if err != nil {
//发送失败移除请求
node.serveMux.RemoveRequest(peer.PID(), nonce)
return err
}
if sync {
//等待返回
result := <-respChan
reqFunc(result)
}
return nil
}
//encryptPacket 加密数据包
func (node *OWTPNode) encryptPacket(peer Peer, packet *DataPacket, key string) error {
//没有密钥不加密
if len(key) == 0 {
return nil
}
//var jsonByte []byte
//
//if encStr, ok := packet.Data.(string); ok {
// //无需转换为json
// jsonByte = []byte(encStr)
//} else {
// enc, encErr := json.Marshal(packet.Data)
// if encErr != nil {
// return fmt.Errorf("json.Marshal data failed")
// }
// jsonByte = enc
//}
secretKey, decErr := base58.Decode(key)
if decErr != nil {
return decErr
}
chipErr := peer.auth().EncryptDataPacket(packet, secretKey)
if chipErr != nil {
return fmt.Errorf("encrypt data failed")
}
//fmt.Printf("plainText hex(%d): %s\n", len(enc), hex.EncodeToString(enc))
//加载到授权中
//chipText, chipErr := peer.auth().EncryptData(jsonByte, secretKey)
//if chipErr != nil {
// return fmt.Errorf("encrypt data failed")
//}
//fmt.Printf("chipText hex(%d): %s\n", len(chipText), hex.EncodeToString(chipText))
//packet.Data = string(chipText)
return nil
}
//HandleFunc 绑定路由器方法
func (node *OWTPNode) HandleFunc(method string, handler HandlerFunc) {
node.serveMux.HandleFunc(method, handler)
}
//HandlePrepareFunc 绑定准备前的处理方法
func (node *OWTPNode) HandlePrepareFunc(handler HandlerFunc) {
node.serveMux.HandleFunc(PrepareMethod, handler)
}
//HandleFinishFunc 绑定结束后的处理方法
func (node *OWTPNode) HandleFinishFunc(handler HandlerFunc) {
node.serveMux.HandleFunc(FinishMethod, handler)
}
//KeyAgreement 发起协商请求
//这是一个同步请求
func (node *OWTPNode) KeyAgreement(pid string, consultType string) error {
//检查是否已经连接服务
peer := node.GetOnlinePeer(pid)
if peer == nil {
return fmt.Errorf("remote peer is not connected")
}
return node.callKeyAgreement(peer, consultType)
}
//callKeyAgreement 发起协商计算
func (node *OWTPNode) callKeyAgreement(peer Peer, consultType string) error {
var (
err error
)
ka := &KeyAgreement{
EncryptType: consultType,
}
//初始协商参数
err = peer.auth().InitKeyAgreement(ka)
if err != nil {
return err
}
//保存请求协商密码的参数
node.peerstore.Put(peer.PID(), keyAgreementCipher, ka)
callErr := node.Call(
peer.PID(),
KeyAgreementMethod,
nil,
true,
func(resp Response) {
if resp.Status == StatusSuccess {
err = nil
} else {
err = fmt.Errorf("keyAgreement failed, unexpected error: %s", resp.Msg)
}
})
if callErr != nil {
return callErr
}
return err
}
//keyAgreement 协商密钥
func (node *OWTPNode) keyAgreement(ctx *Context) {
ctx.Response(nil, StatusSuccess, "success")
}
//wrapDataPacketForResponse 封装响应的数据包
func (node *OWTPNode) wrapDataPacketForResponse(peer Peer, ctx *Context) *DataPacket {
packet := &DataPacket{}
packet.Version = ctx.Version
packet.Method = ctx.Method
packet.Nonce = ctx.nonce
//处理完请求,推送响应结果给服务端
packet.Req = WSResponse
packet.Data = ctx.Resp
packet.Timestamp = time.Now().Unix()
//如果开启了协商密码,添加协商密码参数
if peer.auth().EnableKeyAgreement() {
value := node.Peerstore().Get(peer.PID(), keyAgreementCipher)
if value == nil {
errMsg := fmt.Sprintf("keyAgreement is enabled, but pid: %s cipher is empty", peer.PID())
packet.Data = responseError(errMsg, ErrKeyAgreementFailed)
return packet
}
ka, ok := value.(*KeyAgreement)
if !ok {
packet.Data = responseError("keyAgreement is enabled, type error", ErrKeyAgreementFailed)
return packet
}
//加密数据
cryptErr := node.encryptPacket(peer, packet, ka.Key)
if cryptErr != nil {
log.Critical("OWTP: encryptData failed, unexpected err:", cryptErr)
packet.Data = responseError("server encryptData failed", ErrInternalServerError)
return packet
}
packet.SecretData = SecretData{
PublicKeyResponder: ka.PublicKeyResponder,
TmpPublicKeyResponder: ka.TmpPublicKeyResponder,
SB: ka.SB,
}
}
return packet
}
//handleKeyAgreementForRequest 处理请求的协商密码,获得密钥
func (node *OWTPNode) handleKeyAgreementForRequest(peer Peer, packet *DataPacket) ([]byte, error) {
var (
//协商密码
secretKey []byte
ka *KeyAgreement
)
//检查是否已经连接服务
if peer == nil {
return nil, fmt.Errorf("peer: %s is not connected. ", peer.PID())
}
//验证授权
if peer.auth() != nil {
//获取缓存中的协商密码组
value := node.Peerstore().Get(peer.PID(), keyAgreementCipher)
if value == nil {
//不存在,重新构建协商密码组
ka = &KeyAgreement{}
} else {
//协商密码存在
k, ok := value.(*KeyAgreement)
if !ok {
return nil, fmt.Errorf("keyAgreement chipher is not saved")
}
ka = k
}
//发起方的请求协商密码的参数
if peer.IsHost() {
//对方是服务端,请求带SecretData.S2
ka.S2 = packet.SecretData.S2
} else {
//对方是客户端,请求带SecretData.SA
ka.SA = packet.SecretData.SA
}
ka.PublicKeyInitiator = packet.SecretData.PublicKeyInitiator
ka.TmpPublicKeyInitiator = packet.SecretData.TmpPublicKeyInitiator
//验证协商密码
if !peer.auth().VerifyKeyAgreement(ka) {
//协商不通过,需要重新协商
log.Warning("keyAgreement is regenerating")
//传入响应公私钥
ka.PublicKeyResponder = base58.Encode(node.cert.PublicKeyBytes())
ka.PrivateKeyResponder = base58.Encode(node.cert.PrivateKeyBytes())
//请求协商
err := peer.auth().RequestKeyAgreement(ka)
if err != nil {
return nil, err
}
//TODO:应该用一个临时密钥进行加密保存到缓存中
node.peerstore.Put(peer.PID(), keyAgreementCipher, ka)
//数据包配置响应方的协商密码参数
packet.SecretData.PublicKeyResponder = ka.PublicKeyResponder
packet.SecretData.TmpPublicKeyResponder = ka.TmpPublicKeyResponder
packet.SecretData.SB = ka.SB
}
//加载到授权中
secretKey, _ = base58.Decode(ka.Key)
ka = nil
}
return secretKey, nil
}
//handleKeyAgreementForResponse 处理协商密码的响应方结果
func (node *OWTPNode) handleKeyAgreementForResponse(peer Peer, packet *DataPacket) ([]byte, error) {
var (
//协商密码
secretKey []byte
)
//验证授权
if peer.auth() != nil {
//已开启协商密码
if peer.auth().EnableKeyAgreement() {
//获取协商密码组
value := node.Peerstore().Get(peer.PID(), keyAgreementCipher)
if value == nil {
return nil, fmt.Errorf("keyAgreement is not inited")
}
ka, ok := value.(*KeyAgreement)
if !ok {
return nil, fmt.Errorf("keyAgreement chipher is not saved")
}
//本地还没完成生成协商密码
//if len(ka.SA) == 0 || len(ka.Key) == 0 {
if len(ka.SA) == 0 || len(ka.Key) == 0 || ka.SB != packet.SecretData.SB {
//加载响应方的协商密码参数
ka.PublicKeyResponder = packet.SecretData.PublicKeyResponder
ka.TmpPublicKeyResponder = packet.SecretData.TmpPublicKeyResponder