mirror of
https://github.com/joohoi/acme-dns.git
synced 2024-12-22 21:13:54 +07:00
92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
package main
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import (
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"crypto/rand"
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"errors"
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"fmt"
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"github.com/BurntSushi/toml"
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log "github.com/Sirupsen/logrus"
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"github.com/miekg/dns"
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"github.com/satori/go.uuid"
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"math/big"
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"os"
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"regexp"
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"strings"
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)
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func readConfig(fname string) (DNSConfig, error) {
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var conf DNSConfig
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if _, err := toml.DecodeFile(fname, &conf); err != nil {
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return DNSConfig{}, errors.New("Malformed configuration file")
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}
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return conf, nil
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}
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func sanitizeString(s string) string {
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// URL safe base64 alphabet without padding as defined in ACME
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re, _ := regexp.Compile("[^A-Za-z\\-\\_0-9]+")
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return re.ReplaceAllString(s, "")
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}
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func generatePassword(length int) string {
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ret := make([]byte, length)
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const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-_"
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alphalen := big.NewInt(int64(len(alphabet)))
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for i := 0; i < length; i++ {
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c, _ := rand.Int(rand.Reader, alphalen)
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r := int(c.Int64())
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ret[i] = alphabet[r]
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}
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return string(ret)
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}
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func sanitizeDomainQuestion(d string) string {
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dom := strings.ToLower(d)
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firstDot := strings.Index(d, ".")
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if firstDot > 0 {
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dom = dom[0:firstDot]
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}
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fmt.Printf("%s\n", dom)
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return dom
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}
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func newACMETxt() (ACMETxt, error) {
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var a = ACMETxt{}
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password := generatePassword(40)
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a.Username = uuid.NewV4()
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a.Password = password
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a.Subdomain = uuid.NewV4().String()
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return a, nil
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}
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func setupLogging(format string, level string) {
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if DNSConf.Logconfig.Format == "json" {
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log.SetFormatter(&log.JSONFormatter{})
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}
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switch DNSConf.Logconfig.Level {
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default:
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log.SetLevel(log.WarnLevel)
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case "debug":
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log.SetLevel(log.DebugLevel)
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case "info":
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log.SetLevel(log.InfoLevel)
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case "error":
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log.SetLevel(log.ErrorLevel)
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}
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// TODO: file logging
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}
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func startDNS(listen string) *dns.Server {
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// DNS server part
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dns.HandleFunc(".", handleRequest)
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server := &dns.Server{Addr: listen, Net: "udp"}
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go func() {
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err := server.ListenAndServe()
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if err != nil {
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log.Errorf("%v", err)
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os.Exit(1)
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}
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}()
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return server
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}
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