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// Copyright 2016 The Gogs Authors. All rights reserved.
// Copyright 2016 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package generate
import (
"crypto/rand"
"encoding/base64"
"fmt"
"io"
"time"
"code.gitea.io/gitea/modules/util"
"github.com/golang-jwt/jwt/v5"
)
// NewInternalToken generate a new value intended to be used by INTERNAL_TOKEN.
func NewInternalToken() (string, error) {
secretBytes := make([]byte, 32)
_, err := io.ReadFull(rand.Reader, secretBytes)
if err != nil {
return "", err
}
secretKey := base64.RawURLEncoding.EncodeToString(secretBytes)
now := time.Now()
var internalToken string
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 length
func 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, error) {
bytes := make([]byte, 32)
_, err := rand.Read(bytes)
if err != nil {
return nil, "", err
}
return bytes, base64.RawURLEncoding.EncodeToString(bytes), nil
}
// 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
}
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