mirror of
https://github.com/go-acme/lego.git
synced 2024-12-24 01:29:16 +02:00
362 lines
12 KiB
Go
362 lines
12 KiB
Go
package cmd
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import (
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"crypto"
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"crypto/x509"
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"errors"
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"math/rand"
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"os"
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"time"
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"github.com/go-acme/lego/v4/acme/api"
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"github.com/go-acme/lego/v4/certcrypto"
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"github.com/go-acme/lego/v4/certificate"
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"github.com/go-acme/lego/v4/lego"
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"github.com/go-acme/lego/v4/log"
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"github.com/mattn/go-isatty"
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"github.com/urfave/cli/v2"
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)
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const (
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renewEnvAccountEmail = "LEGO_ACCOUNT_EMAIL"
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renewEnvCertDomain = "LEGO_CERT_DOMAIN"
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renewEnvCertPath = "LEGO_CERT_PATH"
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renewEnvCertKeyPath = "LEGO_CERT_KEY_PATH"
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renewEnvCertPEMPath = "LEGO_CERT_PEM_PATH"
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renewEnvCertPFXPath = "LEGO_CERT_PFX_PATH"
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)
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func createRenew() *cli.Command {
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return &cli.Command{
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Name: "renew",
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Usage: "Renew a certificate",
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Action: renew,
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Before: func(ctx *cli.Context) error {
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// we require either domains or csr, but not both
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hasDomains := len(ctx.StringSlice("domains")) > 0
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hasCsr := len(ctx.String("csr")) > 0
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if hasDomains && hasCsr {
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log.Fatal("Please specify either --domains/-d or --csr/-c, but not both")
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}
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if !hasDomains && !hasCsr {
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log.Fatal("Please specify --domains/-d (or --csr/-c if you already have a CSR)")
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}
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return nil
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},
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Flags: []cli.Flag{
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&cli.IntFlag{
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Name: "days",
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Value: 30,
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Usage: "The number of days left on a certificate to renew it.",
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},
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&cli.BoolFlag{
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Name: "ari-enable",
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Usage: "Use the renewalInfo endpoint (draft-ietf-acme-ari) to check if a certificate should be renewed.",
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},
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&cli.DurationFlag{
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Name: "ari-wait-to-renew-duration",
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Usage: "The maximum duration you're willing to sleep for a renewal time returned by the renewalInfo endpoint.",
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},
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&cli.BoolFlag{
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Name: "reuse-key",
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Usage: "Used to indicate you want to reuse your current private key for the new certificate.",
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},
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&cli.BoolFlag{
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Name: "no-bundle",
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Usage: "Do not create a certificate bundle by adding the issuers certificate to the new certificate.",
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},
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&cli.BoolFlag{
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Name: "must-staple",
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Usage: "Include the OCSP must staple TLS extension in the CSR and generated certificate." +
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" Only works if the CSR is generated by lego.",
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},
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&cli.TimestampFlag{
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Name: "not-before",
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Usage: "Set the notBefore field in the certificate (RFC3339 format)",
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Layout: time.RFC3339,
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},
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&cli.TimestampFlag{
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Name: "not-after",
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Usage: "Set the notAfter field in the certificate (RFC3339 format)",
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Layout: time.RFC3339,
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},
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&cli.StringFlag{
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Name: "preferred-chain",
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Usage: "If the CA offers multiple certificate chains, prefer the chain with an issuer matching this Subject Common Name." +
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" If no match, the default offered chain will be used.",
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},
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&cli.StringFlag{
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Name: "always-deactivate-authorizations",
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Usage: "Force the authorizations to be relinquished even if the certificate request was successful.",
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},
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&cli.StringFlag{
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Name: "renew-hook",
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Usage: "Define a hook. The hook is executed only when the certificates are effectively renewed.",
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},
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&cli.BoolFlag{
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Name: "no-random-sleep",
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Usage: "Do not add a random sleep before the renewal." +
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" We do not recommend using this flag if you are doing your renewals in an automated way.",
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},
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},
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}
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}
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func renew(ctx *cli.Context) error {
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account, client := setup(ctx, NewAccountsStorage(ctx))
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setupChallenges(ctx, client)
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if account.Registration == nil {
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log.Fatalf("Account %s is not registered. Use 'run' to register a new account.\n", account.Email)
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}
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certsStorage := NewCertificatesStorage(ctx)
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bundle := !ctx.Bool("no-bundle")
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meta := map[string]string{renewEnvAccountEmail: account.Email}
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// CSR
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if ctx.IsSet("csr") {
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return renewForCSR(ctx, client, certsStorage, bundle, meta)
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}
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// Domains
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return renewForDomains(ctx, client, certsStorage, bundle, meta)
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}
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func renewForDomains(ctx *cli.Context, client *lego.Client, certsStorage *CertificatesStorage, bundle bool, meta map[string]string) error {
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domains := ctx.StringSlice("domains")
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domain := domains[0]
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// load the cert resource from files.
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// We store the certificate, private key and metadata in different files
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// as web servers would not be able to work with a combined file.
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certificates, err := certsStorage.ReadCertificate(domain, ".crt")
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if err != nil {
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log.Fatalf("Error while loading the certificate for domain %s\n\t%v", domain, err)
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}
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cert := certificates[0]
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var ariRenewalTime *time.Time
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if ctx.Bool("ari-enable") {
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ariRenewalTime = getARIRenewalTime(ctx, cert, domain, client)
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if ariRenewalTime != nil {
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now := time.Now().UTC()
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// Figure out if we need to sleep before renewing.
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if ariRenewalTime.After(now) {
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log.Infof("[%s] Sleeping %s until renewal time %s", domain, ariRenewalTime.Sub(now), ariRenewalTime)
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time.Sleep(ariRenewalTime.Sub(now))
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}
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}
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}
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if ariRenewalTime == nil && !needRenewal(cert, domain, ctx.Int("days")) {
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return nil
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}
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// This is just meant to be informal for the user.
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timeLeft := cert.NotAfter.Sub(time.Now().UTC())
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log.Infof("[%s] acme: Trying renewal with %d hours remaining", domain, int(timeLeft.Hours()))
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certDomains := certcrypto.ExtractDomains(cert)
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var privateKey crypto.PrivateKey
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if ctx.Bool("reuse-key") {
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keyBytes, errR := certsStorage.ReadFile(domain, ".key")
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if errR != nil {
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log.Fatalf("Error while loading the private key for domain %s\n\t%v", domain, errR)
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}
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privateKey, errR = certcrypto.ParsePEMPrivateKey(keyBytes)
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if errR != nil {
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return errR
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}
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}
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// https://github.com/go-acme/lego/issues/1656
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// https://github.com/certbot/certbot/blob/284023a1b7672be2bd4018dd7623b3b92197d4b0/certbot/certbot/_internal/renewal.py#L435-L440
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if !isatty.IsTerminal(os.Stdout.Fd()) && !ctx.Bool("no-random-sleep") {
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// https://github.com/certbot/certbot/blob/284023a1b7672be2bd4018dd7623b3b92197d4b0/certbot/certbot/_internal/renewal.py#L472
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const jitter = 8 * time.Minute
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rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
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sleepTime := time.Duration(rnd.Int63n(int64(jitter)))
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log.Infof("renewal: random delay of %s", sleepTime)
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time.Sleep(sleepTime)
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}
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request := certificate.ObtainRequest{
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Domains: merge(certDomains, domains),
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PrivateKey: privateKey,
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MustStaple: ctx.Bool("must-staple"),
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NotBefore: getTime(ctx, "not-before"),
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NotAfter: getTime(ctx, "not-after"),
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Bundle: bundle,
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PreferredChain: ctx.String("preferred-chain"),
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AlwaysDeactivateAuthorizations: ctx.Bool("always-deactivate-authorizations"),
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}
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certRes, err := client.Certificate.Obtain(request)
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if err != nil {
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log.Fatal(err)
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}
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certsStorage.SaveResource(certRes)
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if ariRenewalTime != nil {
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// Post to the renewalInfo endpoint to indicate that we have renewed and replaced the certificate.
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err := client.Certificate.UpdateRenewalInfo(certificate.RenewalInfoRequest{Cert: certificates[0]})
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if err != nil {
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log.Warnf("[%s] Failed to update renewal info: %v", domain, err)
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}
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}
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meta[renewEnvCertDomain] = domain
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meta[renewEnvCertPath] = certsStorage.GetFileName(domain, ".crt")
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meta[renewEnvCertKeyPath] = certsStorage.GetFileName(domain, ".key")
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meta[renewEnvCertPEMPath] = certsStorage.GetFileName(domain, ".pem")
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meta[renewEnvCertPFXPath] = certsStorage.GetFileName(domain, ".pfx")
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return launchHook(ctx.String("renew-hook"), meta)
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}
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func renewForCSR(ctx *cli.Context, client *lego.Client, certsStorage *CertificatesStorage, bundle bool, meta map[string]string) error {
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csr, err := readCSRFile(ctx.String("csr"))
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if err != nil {
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log.Fatal(err)
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}
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domain, err := certcrypto.GetCSRMainDomain(csr)
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if err != nil {
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log.Fatalf("Error: %v", err)
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}
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// load the cert resource from files.
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// We store the certificate, private key and metadata in different files
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// as web servers would not be able to work with a combined file.
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certificates, err := certsStorage.ReadCertificate(domain, ".crt")
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if err != nil {
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log.Fatalf("Error while loading the certificate for domain %s\n\t%v", domain, err)
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}
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cert := certificates[0]
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var ariRenewalTime *time.Time
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if ctx.Bool("ari-enable") {
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ariRenewalTime = getARIRenewalTime(ctx, cert, domain, client)
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if ariRenewalTime != nil {
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now := time.Now().UTC()
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// Figure out if we need to sleep before renewing.
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if ariRenewalTime.After(now) {
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log.Infof("[%s] Sleeping %s until renewal time %s", domain, ariRenewalTime.Sub(now), ariRenewalTime)
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time.Sleep(ariRenewalTime.Sub(now))
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}
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}
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}
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if ariRenewalTime == nil && !needRenewal(cert, domain, ctx.Int("days")) {
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return nil
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}
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// This is just meant to be informal for the user.
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timeLeft := cert.NotAfter.Sub(time.Now().UTC())
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log.Infof("[%s] acme: Trying renewal with %d hours remaining", domain, int(timeLeft.Hours()))
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request := certificate.ObtainForCSRRequest{
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CSR: csr,
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NotBefore: getTime(ctx, "not-before"),
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NotAfter: getTime(ctx, "not-after"),
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Bundle: bundle,
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PreferredChain: ctx.String("preferred-chain"),
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AlwaysDeactivateAuthorizations: ctx.Bool("always-deactivate-authorizations"),
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}
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certRes, err := client.Certificate.ObtainForCSR(request)
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if err != nil {
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log.Fatal(err)
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}
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certsStorage.SaveResource(certRes)
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if ariRenewalTime != nil {
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// Post to the renewalInfo endpoint to indicate that we have renewed and replaced the certificate.
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err := client.Certificate.UpdateRenewalInfo(certificate.RenewalInfoRequest{Cert: certificates[0]})
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if err != nil {
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log.Warnf("[%s] Failed to update renewal info: %v", domain, err)
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}
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}
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meta[renewEnvCertDomain] = domain
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meta[renewEnvCertPath] = certsStorage.GetFileName(domain, ".crt")
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meta[renewEnvCertKeyPath] = certsStorage.GetFileName(domain, ".key")
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return launchHook(ctx.String("renew-hook"), meta)
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}
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func needRenewal(x509Cert *x509.Certificate, domain string, days int) bool {
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if x509Cert.IsCA {
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log.Fatalf("[%s] Certificate bundle starts with a CA certificate", domain)
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}
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if days >= 0 {
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notAfter := int(time.Until(x509Cert.NotAfter).Hours() / 24.0)
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if notAfter > days {
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log.Printf("[%s] The certificate expires in %d days, the number of days defined to perform the renewal is %d: no renewal.",
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domain, notAfter, days)
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return false
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}
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}
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return true
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}
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// getARIRenewalTime checks if the certificate needs to be renewed using the renewalInfo endpoint.
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func getARIRenewalTime(ctx *cli.Context, cert *x509.Certificate, domain string, client *lego.Client) *time.Time {
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if cert.IsCA {
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log.Fatalf("[%s] Certificate bundle starts with a CA certificate", domain)
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}
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renewalInfo, err := client.Certificate.GetRenewalInfo(certificate.RenewalInfoRequest{Cert: cert})
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if err != nil {
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if errors.Is(err, api.ErrNoARI) {
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// The server does not advertise a renewal info endpoint.
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log.Warnf("[%s] acme: %v", domain, err)
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return nil
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}
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log.Warnf("[%s] acme: calling renewal info endpoint: %v", domain, err)
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return nil
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}
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now := time.Now().UTC()
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renewalTime := renewalInfo.ShouldRenewAt(now, ctx.Duration("ari-wait-to-renew-duration"))
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if renewalTime == nil {
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log.Infof("[%s] acme: renewalInfo endpoint indicates that renewal is not needed", domain)
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return nil
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}
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log.Infof("[%s] acme: renewalInfo endpoint indicates that renewal is needed", domain)
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if renewalInfo.ExplanationURL != "" {
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log.Infof("[%s] acme: renewalInfo endpoint provided an explanation: %s", domain, renewalInfo.ExplanationURL)
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}
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return renewalTime
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}
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func merge(prevDomains, nextDomains []string) []string {
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for _, next := range nextDomains {
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var found bool
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for _, prev := range prevDomains {
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if prev == next {
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found = true
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break
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}
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}
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if !found {
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prevDomains = append(prevDomains, next)
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}
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}
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return prevDomains
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}
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