lego/acme/http_challenge.go
2016-01-11 22:04:04 +01:00

74 lines
1.7 KiB
Go

package acme
import (
"fmt"
"net"
"net/http"
"strings"
)
type httpChallenge struct {
jws *jws
validate validateFunc
iface string
port string
done chan bool
}
func (s *httpChallenge) Solve(chlng challenge, domain string) error {
logf("[INFO][%s] acme: Trying to solve HTTP-01", domain)
s.done = make(chan bool)
// Generate the Key Authorization for the challenge
keyAuth, err := getKeyAuthorization(chlng.Token, &s.jws.privKey.PublicKey)
if err != nil {
return err
}
// Allow for CLI port override
port := "80"
if s.port != "" {
port = s.port
}
iface := ""
if s.iface != "" {
iface = s.iface
}
listener, err := net.Listen("tcp", net.JoinHostPort(iface, port))
if err != nil {
return fmt.Errorf("Could not start HTTP server for challenge -> %v", err)
}
path := "/.well-known/acme-challenge/" + chlng.Token
go s.serve(listener, path, keyAuth, domain)
err = s.validate(s.jws, domain, chlng.URI, challenge{Resource: "challenge", Type: chlng.Type, Token: chlng.Token, KeyAuthorization: keyAuth})
listener.Close()
<-s.done
return err
}
func (s *httpChallenge) serve(listener net.Listener, path, keyAuth, domain string) {
// The handler validates the HOST header and request type.
// For validation it then writes the token the server returned with the challenge
mux := http.NewServeMux()
mux.HandleFunc(path, func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.Host, domain) && r.Method == "GET" {
w.Header().Add("Content-Type", "text/plain")
w.Write([]byte(keyAuth))
logf("[INFO][%s] Served key authentication", domain)
} else {
logf("[INFO] Received request for domain %s with method %s", r.Host, r.Method)
w.Write([]byte("TEST"))
}
})
http.Serve(listener, mux)
s.done <- true
}