Remove galene-link.

Our tokens are not revocable, they should not be generated with
a large lifetime.  Don't encourage users to do that.

CHANGES

@@ -8,7 +8,6 @@ Galene 0.5 (unreleased)
   * Add side-menu options for high-quality audio (Opus at 128kbps) and
     disabling audio preprocessing.
   * Send audio in addition to video when sharing browser tabs.
-  * Add the "galene-link" utility, which generates autologin links.
 
 1 February 2022: Galene 0.4.4
 

galene-link/galene-link.go

-package main
-
-import (
-	"flag"
-	"fmt"
-	"log"
-	"net/url"
-	"path"
-	"time"
-
-	"github.com/golang-jwt/jwt/v4"
-
-	"github.com/jech/galene/group"
-	"github.com/jech/galene/token"
-)
-
-func main() {
-	var username, kid, server string
-	var valid int
-	var tokenOnly bool
-	flag.StringVar(&group.Directory, "groups", "./groups/",
-		"group description `directory`")
-	flag.StringVar(&username, "user", "", "username")
-	flag.StringVar(&kid, "kid", "", "`id` of key to use")
-	flag.IntVar(&valid, "valid", 86400, "`seconds` validity")
-	flag.StringVar(&server, "server", "https://galene.org:8443",
-		"server `url`")
-	flag.BoolVar(&tokenOnly, "token", false, "generate token only")
-	flag.Parse()
-
-	if flag.NArg() != 1 {
-		log.Fatal("One argument (the group URL) required")
-	}
-	groupname := flag.Arg(0)
-
-	desc, err := group.GetDescription(groupname)
-	if err != nil {
-		log.Fatal("Get group description: ", err)
-	}
-
-	serverURL, err := url.Parse(server)
-	if err != nil {
-		log.Fatal("Couldn't parse server URL")
-	}
-	pth := path.Join(path.Join(serverURL.Path, "group"), groupname) + "/"
-	groupURL := &url.URL{
-		Scheme: serverURL.Scheme,
-		Host:   serverURL.Host,
-		Path:   pth,
-	}
-
-	keys := desc.AuthKeys
-	var key map[string]interface{}
-	for _, k := range keys {
-		kid2, _ := k["kid"].(string)
-		if kid == "" || kid == kid2 {
-			key = k
-			break
-		}
-	}
-
-	if key == nil {
-		log.Fatal("Couldn't find key")
-	}
-
-	alg, ok := key["alg"].(string)
-	var method jwt.SigningMethod
-	if ok {
-		method = jwt.GetSigningMethod(alg)
-	}
-	if method == nil {
-		log.Fatal("Couldn't determine key signing method")
-	}
-
-	kstring, err := token.ParseKey(key)
-	if err != nil {
-		log.Fatal("Couldn't parse key")
-	}
-
-	now := time.Now()
-	end := now.Add(time.Second * time.Duration(valid))
-	token := jwt.NewWithClaims(
-		method,
-		&jwt.MapClaims{
-			"sub":         username,
-			"aud":         groupURL.String(),
-			"exp":         &jwt.NumericDate{end},
-			"nbf":         &jwt.NumericDate{now},
-			"iat":         &jwt.NumericDate{now},
-			"permissions": []string{"present"},
-		},
-	)
-
-	s, err := token.SignedString(kstring)
-	if err != nil {
-		log.Fatal("Couldn't sign token: ", err)
-	}
-
-	if tokenOnly {
-		fmt.Println(s)
-	} else {
-		query := url.Values{}
-		query.Add("token", s)
-		outURL := &url.URL{
-			Scheme:   groupURL.Scheme,
-			Host:     groupURL.Host,
-			Path:     groupURL.Path,
-			RawQuery: query.Encode(),
-		}
-		fmt.Println(outURL.String())
-	}
-}