419 lines
12 KiB
Go
419 lines
12 KiB
Go
package main
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import (
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"bufio"
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"bytes"
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"crypto/x509"
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"encoding/json"
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"encoding/pem"
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"io/ioutil"
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"net/http"
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"os"
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"path"
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"strings"
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"time"
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"github.com/urfave/cli"
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"github.com/xenolf/lego/acme"
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"github.com/xenolf/lego/providers/dns"
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"github.com/xenolf/lego/providers/http/memcached"
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"github.com/xenolf/lego/providers/http/webroot"
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)
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func checkFolder(path string) error {
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if _, err := os.Stat(path); os.IsNotExist(err) {
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return os.MkdirAll(path, 0700)
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}
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return nil
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}
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func setup(c *cli.Context) (*Configuration, *Account, *acme.Client) {
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if c.GlobalIsSet("http-timeout") {
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acme.HTTPClient = http.Client{Timeout: time.Duration(c.GlobalInt("http-timeout")) * time.Second}
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}
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if c.GlobalIsSet("dns-timeout") {
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acme.DNSTimeout = time.Duration(c.GlobalInt("dns-timeout")) * time.Second
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}
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if len(c.GlobalStringSlice("dns-resolvers")) > 0 {
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resolvers := []string{}
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for _, resolver := range c.GlobalStringSlice("dns-resolvers") {
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if !strings.Contains(resolver, ":") {
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resolver += ":53"
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}
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resolvers = append(resolvers, resolver)
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}
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acme.RecursiveNameservers = resolvers
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}
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err := checkFolder(c.GlobalString("path"))
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if err != nil {
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logger().Fatalf("Could not check/create path: %s", err.Error())
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}
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conf := NewConfiguration(c)
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if len(c.GlobalString("email")) == 0 {
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logger().Fatal("You have to pass an account (email address) to the program using --email or -m")
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}
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//TODO: move to account struct? Currently MUST pass email.
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acc := NewAccount(c.GlobalString("email"), conf)
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keyType, err := conf.KeyType()
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if err != nil {
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logger().Fatal(err.Error())
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}
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client, err := acme.NewClient(c.GlobalString("server"), acc, keyType)
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if err != nil {
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logger().Fatalf("Could not create client: %s", err.Error())
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}
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if len(c.GlobalStringSlice("exclude")) > 0 {
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client.ExcludeChallenges(conf.ExcludedSolvers())
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}
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if c.GlobalIsSet("webroot") {
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provider, err := webroot.NewHTTPProvider(c.GlobalString("webroot"))
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if err != nil {
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logger().Fatal(err)
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}
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client.SetChallengeProvider(acme.HTTP01, provider)
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// --webroot=foo indicates that the user specifically want to do a HTTP challenge
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// infer that the user also wants to exclude all other challenges
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client.ExcludeChallenges([]acme.Challenge{acme.DNS01, acme.TLSSNI01})
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}
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if c.GlobalIsSet("memcached-host") {
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provider, err := memcached.NewMemcachedProvider(c.GlobalStringSlice("memcached-host"))
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if err != nil {
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logger().Fatal(err)
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}
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client.SetChallengeProvider(acme.HTTP01, provider)
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// --memcached-host=foo:11211 indicates that the user specifically want to do a HTTP challenge
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// infer that the user also wants to exclude all other challenges
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client.ExcludeChallenges([]acme.Challenge{acme.DNS01, acme.TLSSNI01})
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}
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if c.GlobalIsSet("http") {
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if strings.Index(c.GlobalString("http"), ":") == -1 {
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logger().Fatalf("The --http switch only accepts interface:port or :port for its argument.")
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}
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client.SetHTTPAddress(c.GlobalString("http"))
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}
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if c.GlobalIsSet("tls") {
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if strings.Index(c.GlobalString("tls"), ":") == -1 {
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logger().Fatalf("The --tls switch only accepts interface:port or :port for its argument.")
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}
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client.SetTLSAddress(c.GlobalString("tls"))
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}
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if c.GlobalIsSet("dns") {
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provider, err := dns.NewDNSChallengeProviderByName(c.GlobalString("dns"))
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if err != nil {
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logger().Fatal(err)
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}
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client.SetChallengeProvider(acme.DNS01, provider)
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// --dns=foo indicates that the user specifically want to do a DNS challenge
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// infer that the user also wants to exclude all other challenges
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client.ExcludeChallenges([]acme.Challenge{acme.HTTP01, acme.TLSSNI01})
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}
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return conf, acc, client
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}
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func saveCertRes(certRes acme.CertificateResource, conf *Configuration) {
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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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certOut := path.Join(conf.CertPath(), certRes.Domain+".crt")
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privOut := path.Join(conf.CertPath(), certRes.Domain+".key")
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pemOut := path.Join(conf.CertPath(), certRes.Domain+".pem")
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metaOut := path.Join(conf.CertPath(), certRes.Domain+".json")
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issuerOut := path.Join(conf.CertPath(), certRes.Domain+".issuer.crt")
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err := ioutil.WriteFile(certOut, certRes.Certificate, 0600)
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if err != nil {
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logger().Fatalf("Unable to save Certificate for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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if certRes.IssuerCertificate != nil {
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err = ioutil.WriteFile(issuerOut, certRes.IssuerCertificate, 0600)
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if err != nil {
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logger().Fatalf("Unable to save IssuerCertificate for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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}
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if certRes.PrivateKey != nil {
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// if we were given a CSR, we don't know the private key
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err = ioutil.WriteFile(privOut, certRes.PrivateKey, 0600)
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if err != nil {
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logger().Fatalf("Unable to save PrivateKey for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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if conf.context.GlobalBool("pem") {
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err = ioutil.WriteFile(pemOut, bytes.Join([][]byte{certRes.Certificate, certRes.PrivateKey}, nil), 0600)
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if err != nil {
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logger().Fatalf("Unable to save Certificate and PrivateKey in .pem for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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}
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} else if conf.context.GlobalBool("pem") {
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// we don't have the private key; can't write the .pem file
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logger().Fatalf("Unable to save pem without private key for domain %s\n\t%s; are you using a CSR?", certRes.Domain, err.Error())
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}
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jsonBytes, err := json.MarshalIndent(certRes, "", "\t")
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if err != nil {
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logger().Fatalf("Unable to marshal CertResource for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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err = ioutil.WriteFile(metaOut, jsonBytes, 0600)
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if err != nil {
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logger().Fatalf("Unable to save CertResource for domain %s\n\t%s", certRes.Domain, err.Error())
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}
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}
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func handleTOS(c *cli.Context, client *acme.Client, acc *Account) {
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// Check for a global accept override
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if c.GlobalBool("accept-tos") {
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err := client.AgreeToTOS()
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if err != nil {
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logger().Fatalf("Could not agree to TOS: %s", err.Error())
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}
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acc.Save()
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return
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}
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reader := bufio.NewReader(os.Stdin)
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logger().Printf("Please review the TOS at %s", acc.Registration.TosURL)
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for {
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logger().Println("Do you accept the TOS? Y/n")
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text, err := reader.ReadString('\n')
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if err != nil {
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logger().Fatalf("Could not read from console: %s", err.Error())
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}
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text = strings.Trim(text, "\r\n")
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if text == "n" {
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logger().Fatal("You did not accept the TOS. Unable to proceed.")
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}
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if text == "Y" || text == "y" || text == "" {
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err = client.AgreeToTOS()
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if err != nil {
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logger().Fatalf("Could not agree to TOS: %s", err.Error())
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}
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acc.Save()
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break
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}
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logger().Println("Your input was invalid. Please answer with one of Y/y, n or by pressing enter.")
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}
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}
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func readCSRFile(filename string) (*x509.CertificateRequest, error) {
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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raw := bytes
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// see if we can find a PEM-encoded CSR
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var p *pem.Block
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rest := bytes
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for {
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// decode a PEM block
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p, rest = pem.Decode(rest)
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// did we fail?
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if p == nil {
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break
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}
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// did we get a CSR?
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if p.Type == "CERTIFICATE REQUEST" {
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raw = p.Bytes
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}
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}
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// no PEM-encoded CSR
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// assume we were given a DER-encoded ASN.1 CSR
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// (if this assumption is wrong, parsing these bytes will fail)
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return x509.ParseCertificateRequest(raw)
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}
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func run(c *cli.Context) error {
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conf, acc, client := setup(c)
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if acc.Registration == nil {
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reg, err := client.Register()
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if err != nil {
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logger().Fatalf("Could not complete registration\n\t%s", err.Error())
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}
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acc.Registration = reg
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acc.Save()
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logger().Print("!!!! HEADS UP !!!!")
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logger().Printf(`
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Your account credentials have been saved in your Let's Encrypt
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configuration directory at "%s".
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You should make a secure backup of this folder now. This
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configuration directory will also contain certificates and
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private keys obtained from Let's Encrypt so making regular
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backups of this folder is ideal.`, conf.AccountPath(c.GlobalString("email")))
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}
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// If the agreement URL is empty, the account still needs to accept the LE TOS.
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if acc.Registration.Body.Agreement == "" {
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handleTOS(c, client, acc)
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}
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// we require either domains or csr, but not both
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hasDomains := len(c.GlobalStringSlice("domains")) > 0
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hasCsr := len(c.GlobalString("csr")) > 0
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if hasDomains && hasCsr {
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logger().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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logger().Fatal("Please specify --domains/-d (or --csr/-c if you already have a CSR)")
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}
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var cert acme.CertificateResource
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var failures map[string]error
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if hasDomains {
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// obtain a certificate, generating a new private key
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cert, failures = client.ObtainCertificate(c.GlobalStringSlice("domains"), !c.Bool("no-bundle"), nil, c.Bool("must-staple"))
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} else {
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// read the CSR
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csr, err := readCSRFile(c.GlobalString("csr"))
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if err != nil {
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// we couldn't read the CSR
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failures = map[string]error{"csr": err}
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} else {
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// obtain a certificate for this CSR
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cert, failures = client.ObtainCertificateForCSR(*csr, !c.Bool("no-bundle"))
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}
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}
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if len(failures) > 0 {
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for k, v := range failures {
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logger().Printf("[%s] Could not obtain certificates\n\t%s", k, v.Error())
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}
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// Make sure to return a non-zero exit code if ObtainSANCertificate
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// returned at least one error. Due to us not returning partial
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// certificate we can just exit here instead of at the end.
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os.Exit(1)
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}
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err := checkFolder(conf.CertPath())
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if err != nil {
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logger().Fatalf("Could not check/create path: %s", err.Error())
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}
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saveCertRes(cert, conf)
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return nil
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}
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func revoke(c *cli.Context) error {
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conf, _, client := setup(c)
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err := checkFolder(conf.CertPath())
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if err != nil {
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logger().Fatalf("Could not check/create path: %s", err.Error())
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}
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for _, domain := range c.GlobalStringSlice("domains") {
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logger().Printf("Trying to revoke certificate for domain %s", domain)
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certPath := path.Join(conf.CertPath(), domain+".crt")
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certBytes, err := ioutil.ReadFile(certPath)
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err = client.RevokeCertificate(certBytes)
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if err != nil {
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logger().Fatalf("Error while revoking the certificate for domain %s\n\t%s", domain, err.Error())
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} else {
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logger().Print("Certificate was revoked.")
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}
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}
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return nil
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}
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func renew(c *cli.Context) error {
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conf, _, client := setup(c)
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if len(c.GlobalStringSlice("domains")) <= 0 {
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logger().Fatal("Please specify at least one domain.")
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}
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domain := c.GlobalStringSlice("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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certPath := path.Join(conf.CertPath(), domain+".crt")
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privPath := path.Join(conf.CertPath(), domain+".key")
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metaPath := path.Join(conf.CertPath(), domain+".json")
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certBytes, err := ioutil.ReadFile(certPath)
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if err != nil {
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logger().Fatalf("Error while loading the certificate for domain %s\n\t%s", domain, err.Error())
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}
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if c.IsSet("days") {
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expTime, err := acme.GetPEMCertExpiration(certBytes)
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if err != nil {
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logger().Printf("Could not get Certification expiration for domain %s", domain)
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}
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if int(expTime.Sub(time.Now()).Hours()/24.0) > c.Int("days") {
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return nil
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}
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}
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metaBytes, err := ioutil.ReadFile(metaPath)
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if err != nil {
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logger().Fatalf("Error while loading the meta data for domain %s\n\t%s", domain, err.Error())
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}
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var certRes acme.CertificateResource
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err = json.Unmarshal(metaBytes, &certRes)
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if err != nil {
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logger().Fatalf("Error while marshalling the meta data for domain %s\n\t%s", domain, err.Error())
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}
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if c.Bool("reuse-key") {
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keyBytes, err := ioutil.ReadFile(privPath)
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if err != nil {
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logger().Fatalf("Error while loading the private key for domain %s\n\t%s", domain, err.Error())
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}
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certRes.PrivateKey = keyBytes
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}
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certRes.Certificate = certBytes
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newCert, err := client.RenewCertificate(certRes, !c.Bool("no-bundle"), c.Bool("must-staple"))
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if err != nil {
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logger().Fatalf("%s", err.Error())
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}
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saveCertRes(newCert, conf)
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return nil
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}
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