nginx-ui/server/tool/cert.go

package tool

import (
    "crypto"
    "crypto/ecdsa"
    "crypto/elliptic"
    "crypto/rand"
    "crypto/tls"
    "crypto/x509"
    "github.com/0xJacky/Nginx-UI/server/model"
    "github.com/0xJacky/Nginx-UI/server/settings"
    "github.com/0xJacky/Nginx-UI/server/tool/nginx"
    "github.com/go-acme/lego/v4/certcrypto"
    "github.com/go-acme/lego/v4/certificate"
    "github.com/go-acme/lego/v4/challenge/http01"
    "github.com/go-acme/lego/v4/lego"
    "github.com/go-acme/lego/v4/registration"
    "github.com/pkg/errors"
    "io"
    "io/ioutil"
    "log"
    "net"
    "net/http"
    "os"
    "path/filepath"
    "time"
)

// MyUser You'll need a user or account type that implements acme.User
type MyUser struct {
    Email        string
    Registration *registration.Resource
    key          crypto.PrivateKey
}

func (u *MyUser) GetEmail() string {
    return u.Email
}
func (u *MyUser) GetRegistration() *registration.Resource {
    return u.Registration
}
func (u *MyUser) GetPrivateKey() crypto.PrivateKey {
    return u.key
}

func AutoCert() {
    defer func() {
        if err := recover(); err != nil {
            log.Println("[AutoCert] Recover", err)
        }
    }()
    log.Println("[AutoCert] Start")
    autoCertList := model.GetAutoCertList()
    for i := range autoCertList {
        domain := autoCertList[i].Domain
        key, err := GetCertInfo(domain)
        if err != nil {
            log.Println("GetCertInfo Err", err)
            // 获取证书信息失败，本次跳过
            continue
        }
        // 未到一个月
        if time.Now().Before(key.NotBefore.AddDate(0, 1, 0)) {
            continue
        }
        // 过一个月了，重新申请证书
        err = IssueCert(domain)
        if err != nil {
            log.Println(err)
        }
    }
}

func GetCertInfo(domain string) (key *x509.Certificate, err error) {

    var response *http.Response

    client := &http.Client{
        Transport: &http.Transport{
            DialContext: (&net.Dialer{
                Timeout: 5 * time.Second,
            }).DialContext,
            DisableKeepAlives: true,
            TLSClientConfig:   &tls.Config{InsecureSkipVerify: true},
        },
        Timeout: 5 * time.Second,
    }

    response, err = client.Get("https://" + domain)

    if err != nil {
        err = errors.Wrap(err, "get cert info error")
        return
    }

    defer func(Body io.ReadCloser) {
        err = Body.Close()
        if err != nil {
            log.Println(err)
            return
        }
    }(response.Body)

    key = response.TLS.PeerCertificates[0]

    return
}

func IssueCert(domain string) error {
    // Create a user. New accounts need an email and private key to start.
    privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
    if err != nil {
        return errors.Wrap(err, "issue cert generate key error")
    }

    myUser := MyUser{
        Email: settings.ServerSettings.Email,
        key:   privateKey,
    }

    config := lego.NewConfig(&myUser)

    if settings.ServerSettings.Demo {
        config.CADirURL = "https://acme-staging-v02.api.letsencrypt.org/directory"
    }
    
    config.Certificate.KeyType = certcrypto.RSA2048

    // A client facilitates communication with the CA server.
    client, err := lego.NewClient(config)
    if err != nil {
        return errors.Wrap(err, "issue cert new client error")
    }

    err = client.Challenge.SetHTTP01Provider(
        http01.NewProviderServer("",
            settings.ServerSettings.HTTPChallengePort,
        ),
    )
    if err != nil {
        return errors.Wrap(err, "issue cert challenge fail")
    }

    // New users will need to register
    reg, err := client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
    if err != nil {
        log.Println(err)
        return errors.Wrap(err, "issue cert register fail")
    }
    myUser.Registration = reg

    request := certificate.ObtainRequest{
        Domains: []string{domain},
        Bundle:  true,
    }
    certificates, err := client.Certificate.Obtain(request)
    if err != nil {
        return errors.Wrap(err, "issue cert fail to obtain")
    }
    saveDir := nginx.GetNginxConfPath("ssl/" + domain)
    if _, err = os.Stat(saveDir); os.IsNotExist(err) {
        err = os.Mkdir(saveDir, 0755)
        if err != nil {
            return errors.Wrap(err, "issue cert fail to create")
        }
    }

    // Each certificate comes back with the cert bytes, the bytes of the client's
    // private key, and a certificate URL. SAVE THESE TO DISK.
    err = ioutil.WriteFile(filepath.Join(saveDir, "fullchain.cer"),
        certificates.Certificate, 0644)

    if err != nil {
        log.Println(err)
        return errors.Wrap(err, "issue cert write fullchain.cer fail")
    }

    err = ioutil.WriteFile(filepath.Join(saveDir, domain+".key"),
        certificates.PrivateKey, 0644)

    if err != nil {
        log.Println(err)
        return errors.Wrap(err, "issue cert write key fail")
    }

    nginx.ReloadNginx()

    return nil
}