264 lines
6.9 KiB
Go
264 lines
6.9 KiB
Go
package ddns
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import (
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"bytes"
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"crypto/hmac"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"io"
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"log"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/naiba/nezha/pkg/utils"
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)
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const te = "https://dnspod.tencentcloudapi.com"
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type ProviderTencentCloud struct {
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secretID string
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secretKey string
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domainConfig *DomainConfig
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resp *tcResp
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}
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type tcReq struct {
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RecordType string `json:"RecordType"`
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Domain string `json:"Domain"`
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RecordLine string `json:"RecordLine"`
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Subdomain string `json:"Subdomain,omitempty"`
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SubDomain string `json:"SubDomain,omitempty"` // As is
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Value string `json:"Value,omitempty"`
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TTL uint32 `json:"TTL,omitempty"`
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RecordId uint64 `json:"RecordId,omitempty"`
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}
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type tcResp struct {
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Response struct {
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RecordList []struct {
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RecordId uint64
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Value string
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}
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Error struct {
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Code string
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}
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}
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}
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func NewProviderTencentCloud(id, key string) *ProviderTencentCloud {
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return &ProviderTencentCloud{
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secretID: id,
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secretKey: key,
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}
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}
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func (provider *ProviderTencentCloud) UpdateDomain(domainConfig *DomainConfig) error {
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if domainConfig == nil {
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return fmt.Errorf("获取 DDNS 配置失败")
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}
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provider.domainConfig = domainConfig
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// 当IPv4和IPv6同时成功才算作成功
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var err error
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if provider.domainConfig.EnableIPv4 {
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if err = provider.addDomainRecord(true); err != nil {
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return err
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}
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}
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if provider.domainConfig.EnableIpv6 {
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if err = provider.addDomainRecord(false); err != nil {
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return err
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}
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}
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return err
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}
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func (provider *ProviderTencentCloud) addDomainRecord(isIpv4 bool) error {
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err := provider.findDNSRecord(isIpv4)
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if err != nil {
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return fmt.Errorf("查找 DNS 记录时出错: %s", err)
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}
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if provider.resp.Response.Error.Code == "ResourceNotFound.NoDataOfRecord" { // 没有找到 DNS 记录
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return provider.createDNSRecord(isIpv4)
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} else if provider.resp.Response.Error.Code != "" {
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return fmt.Errorf("查询 DNS 记录时出错，错误代码为: %s", provider.resp.Response.Error.Code)
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}
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// 默认情况下更新 DNS 记录
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return provider.updateDNSRecord(isIpv4)
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}
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func (provider *ProviderTencentCloud) findDNSRecord(isIPv4 bool) error {
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var ipType string
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if isIPv4 {
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ipType = "A"
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} else {
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ipType = "AAAA"
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}
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prefix, realDomain := splitDomain(provider.domainConfig.FullDomain)
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data := &tcReq{
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RecordType: ipType,
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Domain: realDomain,
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RecordLine: "默认",
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Subdomain: prefix,
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}
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jsonData, _ := utils.Json.Marshal(data)
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body, err := provider.sendRequest("DescribeRecordList", jsonData)
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if err != nil {
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return err
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}
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provider.resp = &tcResp{}
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err = utils.Json.Unmarshal(body, provider.resp)
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if err != nil {
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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 (provider *ProviderTencentCloud) createDNSRecord(isIPv4 bool) error {
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var ipType, ipAddr string
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if isIPv4 {
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ipType = "A"
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ipAddr = provider.domainConfig.Ipv4Addr
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} else {
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ipType = "AAAA"
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ipAddr = provider.domainConfig.Ipv6Addr
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}
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prefix, realDomain := splitDomain(provider.domainConfig.FullDomain)
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data := &tcReq{
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RecordType: ipType,
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RecordLine: "默认",
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Domain: realDomain,
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SubDomain: prefix,
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Value: ipAddr,
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TTL: 600,
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}
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jsonData, _ := utils.Json.Marshal(data)
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_, err := provider.sendRequest("CreateRecord", jsonData)
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return err
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}
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func (provider *ProviderTencentCloud) updateDNSRecord(isIPv4 bool) error {
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var ipType, ipAddr string
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if isIPv4 {
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ipType = "A"
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ipAddr = provider.domainConfig.Ipv4Addr
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} else {
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ipType = "AAAA"
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ipAddr = provider.domainConfig.Ipv6Addr
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}
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prefix, realDomain := splitDomain(provider.domainConfig.FullDomain)
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data := &tcReq{
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RecordType: ipType,
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RecordLine: "默认",
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Domain: realDomain,
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SubDomain: prefix,
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Value: ipAddr,
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TTL: 600,
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RecordId: provider.resp.Response.RecordList[0].RecordId,
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}
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jsonData, _ := utils.Json.Marshal(data)
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_, err := provider.sendRequest("ModifyRecord", jsonData)
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return err
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}
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// 以下为辅助方法，如发送 HTTP 请求等
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func (provider *ProviderTencentCloud) sendRequest(action string, data []byte) ([]byte, error) {
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req, err := http.NewRequest("POST", te, bytes.NewBuffer(data))
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if err != nil {
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return nil, err
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("X-TC-Version", "2021-03-23")
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provider.signRequest(provider.secretID, provider.secretKey, req, action, string(data))
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resp, err := utils.HttpClient.Do(req)
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if err != nil {
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return nil, err
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}
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defer func(Body io.ReadCloser) {
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err := Body.Close()
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if err != nil {
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log.Printf("NEZHA>> 无法关闭HTTP响应体流: %s\n", err.Error())
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}
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}(resp.Body)
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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return body, nil
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}
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// https://github.com/jeessy2/ddns-go/blob/master/util/tencent_cloud_signer.go
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func (provider *ProviderTencentCloud) sha256hex(s string) string {
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b := sha256.Sum256([]byte(s))
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return hex.EncodeToString(b[:])
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}
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func (provider *ProviderTencentCloud) hmacsha256(s, key string) string {
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hashed := hmac.New(sha256.New, []byte(key))
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hashed.Write([]byte(s))
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return string(hashed.Sum(nil))
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}
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func (provider *ProviderTencentCloud) WriteString(strs ...string) string {
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var b strings.Builder
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for _, str := range strs {
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b.WriteString(str)
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}
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return b.String()
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}
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func (provider *ProviderTencentCloud) signRequest(secretId string, secretKey string, r *http.Request, action string, payload string) {
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algorithm := "TC3-HMAC-SHA256"
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service := "dnspod"
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host := provider.WriteString(service, ".tencentcloudapi.com")
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timestamp := time.Now().Unix()
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timestampStr := strconv.FormatInt(timestamp, 10)
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// 步骤 1：拼接规范请求串
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canonicalHeaders := provider.WriteString("content-type:application/json\nhost:", host, "\nx-tc-action:", strings.ToLower(action), "\n")
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signedHeaders := "content-type;host;x-tc-action"
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hashedRequestPayload := provider.sha256hex(payload)
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canonicalRequest := provider.WriteString("POST\n/\n\n", canonicalHeaders, "\n", signedHeaders, "\n", hashedRequestPayload)
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// 步骤 2：拼接待签名字符串
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date := time.Unix(timestamp, 0).UTC().Format("2006-01-02")
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credentialScope := provider.WriteString(date, "/", service, "/tc3_request")
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hashedCanonicalRequest := provider.sha256hex(canonicalRequest)
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string2sign := provider.WriteString(algorithm, "\n", timestampStr, "\n", credentialScope, "\n", hashedCanonicalRequest)
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// 步骤 3：计算签名
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secretDate := provider.hmacsha256(date, provider.WriteString("TC3", secretKey))
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secretService := provider.hmacsha256(service, secretDate)
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secretSigning := provider.hmacsha256("tc3_request", secretService)
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signature := hex.EncodeToString([]byte(provider.hmacsha256(string2sign, secretSigning)))
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// 步骤 4：拼接 Authorization
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authorization := provider.WriteString(algorithm, " Credential=", secretId, "/", credentialScope, ", SignedHeaders=", signedHeaders, ", Signature=", signature)
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r.Header.Add("Authorization", authorization)
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r.Header.Set("Host", host)
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r.Header.Set("X-TC-Action", action)
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r.Header.Add("X-TC-Timestamp", timestampStr)
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}
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