feat: export generate key

License: MIT
Signed-off-by: Henrique Dias <hacdias@gmail.com>

cmd/config_import.go

@@ -40,7 +40,7 @@ The path must be for a json or yaml file.`,
 			checkErr(err)
 			key = settings.Key
 		} else {
-			key = generateRandomBytes(64)
+			key = generateKey()
 		}
 
 		file := settingsFile{}

cmd/config_init.go

@@ -29,7 +29,7 @@ override the options.`,
 		authMethod, auther := getAuthentication(flags)
 
 		s := &settings.Settings{
-			Key:        generateRandomBytes(64), // 256 bit
+			Key:        generateKey(),
 			Signup:     mustGetBool(flags, "signup"),
 			Shell:      strings.Split(strings.TrimSpace(mustGetString(flags, "shell")), " "),
 			AuthMethod: authMethod,

cmd/root.go

@@ -215,7 +215,7 @@ func setupLog(logMethod string) {
 
 func quickSetup(flags *pflag.FlagSet, d pythonData) {
 	set := &settings.Settings{
-		Key:    generateRandomBytes(64), // 256 bit
+		Key:    generateKey(),
 		Signup: false,
 		Defaults: settings.UserDefaults{
 			Scope:  ".",

cmd/utils.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"crypto/rand"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -10,6 +9,7 @@ import (
 	"path/filepath"
 
 	"github.com/asdine/storm"
+	"github.com/filebrowser/filebrowser/v2/settings"
 	"github.com/filebrowser/filebrowser/v2/storage"
 	"github.com/filebrowser/filebrowser/v2/storage/bolt"
 	"github.com/spf13/cobra"
@@ -41,12 +41,10 @@ func mustGetUint(flags *pflag.FlagSet, flag string) uint {
 	return b
 }
 
-func generateRandomBytes(n int) []byte {
-	b := make([]byte, n)
-	_, err := rand.Read(b)
+func generateKey() []byte {
+	k, err := settings.GenerateKey()
 	checkErr(err)
-	// Note that err == nil only if we read len(b) bytes.
-	return b
+	return k
 }
 
 type cobraFunc func(cmd *cobra.Command, args []string)

settings/settings.go

@@ -1,6 +1,7 @@
 package settings
 
 import (
+	"crypto/rand"
 	"strings"
 
 	"github.com/filebrowser/filebrowser/v2/rules"
@@ -41,3 +42,15 @@ type Server struct {
 func (s *Server) Clean() {
 	s.BaseURL = strings.TrimSuffix(s.BaseURL, "/")
 }
+
+// GenerateKey generates a key of 256 bits.
+func GenerateKey() ([]byte, error) {
+	b := make([]byte, 64)
+	_, err := rand.Read(b)
+	// Note that err == nil only if we read len(b) bytes.
+	if err != nil {
+		return nil, err
+	}
+
+	return b, nil
+}