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