// Copyright 2016 The Gogs Authors. All rights reserved.// Copyright 2016 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package generate import (	"encoding/base64"	"fmt"	"time" 	"forgejo.org/modules/util" 	"github.com/golang-jwt/jwt/v5") // NewInternalToken generate a new value intended to be used by INTERNAL_TOKEN.func NewInternalToken() (string, error) {	secretKey := base64.RawURLEncoding.EncodeToString(util.CryptoRandomBytes(32)) 	now := time.Now() 	internalToken, err := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{		"nbf": now.Unix(),	}).SignedString([]byte(secretKey))	if err != nil {		return "", err	} 	return internalToken, nil} const defaultJwtSecretLen = 32 // DecodeJwtSecret decodes a base64 encoded jwt secret into bytes, and check its lengthfunc DecodeJwtSecret(src string) ([]byte, error) {	encoding := base64.RawURLEncoding	decoded := make([]byte, encoding.DecodedLen(len(src))+3)	if n, err := encoding.Decode(decoded, []byte(src)); err != nil {		return nil, err	} else if n != defaultJwtSecretLen {		return nil, fmt.Errorf("invalid base64 decoded length: %d, expects: %d", n, defaultJwtSecretLen)	}	return decoded[:defaultJwtSecretLen], nil} // NewJwtSecret generates a new base64 encoded value intended to be used for JWT secrets.func NewJwtSecret() ([]byte, string) {	bytes := util.CryptoRandomBytes(32)	return bytes, base64.RawURLEncoding.EncodeToString(bytes)} // NewSecretKey generate a new value intended to be used by SECRET_KEY.func NewSecretKey() (string, error) {	secretKey, err := util.CryptoRandomString(64)	if err != nil {		return "", err	} 	return secretKey, nil}