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package tls
import (
"crypto/tls"
"fmt"
"log"
"net/http"
"os"
"path/filepath"
"time"
"github.com/ponzu-cms/ponzu/system/db"
"golang.org/x/crypto/acme/autocert"
)
var m autocert.Manager
// setup attempts to locate or create the cert cache directory and the certs for TLS encryption
func setup() {
pwd, err := os.Getwd()
if err != nil {
log.Fatalln("Couldn't find working directory to locate or save certificates.")
}
cache := autocert.DirCache(filepath.Join(pwd, "system", "tls", "certs"))
if _, err := os.Stat(string(cache)); os.IsNotExist(err) {
err := os.MkdirAll(string(cache), os.ModePerm|os.ModeDir)
if err != nil {
log.Fatalln("Couldn't create cert directory at", cache)
}
}
// get host/domain and email from Config to use for TLS request to Let's encryption.
// we will fail fatally if either are not found since Let's Encrypt will rate-limit
// and sending incomplete requests is wasteful and guarenteed to fail its check
host, err := db.Config("domain")
if err != nil {
log.Fatalln("Error identifying host/domain during TLS set-up.", err)
}
if host == nil {
log.Fatalln("No 'domain' field set in Configuration. Please add a domain before attempting to make certificates.")
}
fmt.Println("Using", string(host), "as host/domain for certificate...")
fmt.Println("NOTE: if the host/domain is not configured properly or is unreachable, HTTPS set-up will fail.")
email, err := db.Config("admin_email")
if err != nil {
log.Fatalln("Error identifying admin email during TLS set-up.", err)
}
if email == nil {
log.Fatalln("No 'admin_email' field set in Configuration. Please add an admin email before attempting to make certificates.")
}
fmt.Println("Using", string(email), "as contact email for certificate...")
m = autocert.Manager{
Prompt: autocert.AcceptTOS,
Cache: cache,
HostPolicy: autocert.HostWhitelist(string(host)),
RenewBefore: time.Hour * 24 * 30,
Email: string(email),
}
}
// Enable runs the setup for creating or locating production certificates and
// starts the TLS server
func Enable() {
setup()
server := &http.Server{
Addr: ":443",
TLSConfig: &tls.Config{GetCertificate: m.GetCertificate},
}
go log.Fatalln(server.ListenAndServeTLS("", ""))
fmt.Println("Server listening on :443 for HTTPS requests...")
}
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