mirror of
https://github.com/go-gitea/gitea
synced 2024-11-13 21:54:24 +00:00
0bb52883eb
Help some users like #16832 #1851 There are many users reporting similar problem: if the SECRET_KEY mismatches, some operations (like 2FA login) only reports unclear 500 error and unclear "base64 decode error" log （some maintainers ever spent a lot of time on debugging such problem) The SECRET_KEY was not well-designed and it is also a kind of technical debt. Since it couldn't be fixed easily, it's good to add clearer error messages, then at least users could know what the real problem is. --------- Co-authored-by: delvh <dev.lh@web.de>
80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package secret
|
|
|
|
import (
|
|
"crypto/aes"
|
|
"crypto/cipher"
|
|
"crypto/rand"
|
|
"encoding/base64"
|
|
"encoding/hex"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/minio/sha256-simd"
|
|
)
|
|
|
|
// AesEncrypt encrypts text and given key with AES.
|
|
func AesEncrypt(key, text []byte) ([]byte, error) {
|
|
block, err := aes.NewCipher(key)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("AesEncrypt invalid key: %v", err)
|
|
}
|
|
b := base64.StdEncoding.EncodeToString(text)
|
|
ciphertext := make([]byte, aes.BlockSize+len(b))
|
|
iv := ciphertext[:aes.BlockSize]
|
|
if _, err = io.ReadFull(rand.Reader, iv); err != nil {
|
|
return nil, fmt.Errorf("AesEncrypt unable to read IV: %w", err)
|
|
}
|
|
cfb := cipher.NewCFBEncrypter(block, iv)
|
|
cfb.XORKeyStream(ciphertext[aes.BlockSize:], []byte(b))
|
|
return ciphertext, nil
|
|
}
|
|
|
|
// AesDecrypt decrypts text and given key with AES.
|
|
func AesDecrypt(key, text []byte) ([]byte, error) {
|
|
block, err := aes.NewCipher(key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(text) < aes.BlockSize {
|
|
return nil, errors.New("AesDecrypt ciphertext too short")
|
|
}
|
|
iv := text[:aes.BlockSize]
|
|
text = text[aes.BlockSize:]
|
|
cfb := cipher.NewCFBDecrypter(block, iv)
|
|
cfb.XORKeyStream(text, text)
|
|
data, err := base64.StdEncoding.DecodeString(string(text))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("AesDecrypt invalid decrypted base64 string: %w", err)
|
|
}
|
|
return data, nil
|
|
}
|
|
|
|
// EncryptSecret encrypts a string with given key into a hex string
|
|
func EncryptSecret(key, str string) (string, error) {
|
|
keyHash := sha256.Sum256([]byte(key))
|
|
plaintext := []byte(str)
|
|
ciphertext, err := AesEncrypt(keyHash[:], plaintext)
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to encrypt by secret: %w", err)
|
|
}
|
|
return hex.EncodeToString(ciphertext), nil
|
|
}
|
|
|
|
// DecryptSecret decrypts a previously encrypted hex string
|
|
func DecryptSecret(key, cipherHex string) (string, error) {
|
|
keyHash := sha256.Sum256([]byte(key))
|
|
ciphertext, err := hex.DecodeString(cipherHex)
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to decrypt by secret, invalid hex string: %w", err)
|
|
}
|
|
plaintext, err := AesDecrypt(keyHash[:], ciphertext)
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to decrypt by secret, the key (maybe SECRET_KEY?) might be incorrect: %w", err)
|
|
}
|
|
return string(plaintext), nil
|
|
}
|