forgejo/modules/generate/generate.go
Gusted 53df0bf9a4 chore(sec): unify usage of crypto/rand.Read (#7453)
- Unify the usage of [`crypto/rand.Read`](https://pkg.go.dev/crypto/rand#Read) to `util.CryptoRandomBytes`.
- Refactor `util.CryptoRandomBytes` to never return an error. It is documented by Go, https://go.dev/issue/66821, to always succeed. So if we still receive a error or if the returned bytes read is not equal to the expected bytes to be read we panic (just to be on the safe side).
- This simplifies a lot of code to no longer care about error handling.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7453
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
2025-04-04 03:31:37 +00:00

61 lines
1.6 KiB
Go

// 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 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) {
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
}