mirror of
https://github.com/go-gitea/gitea
synced 2024-11-13 21:54:24 +00:00
aa23f477b7
- Switch to use `CryptoRandomBytes` instead of `CryptoRandomString`, OAuth's secrets are copied pasted and don't need to avoid dubious characters etc. - `CryptoRandomBytes` gives  `CryptoRandomString` gives  possible states. - Add a prefix, such that code scanners can easily grep these in source code. - 32 Bytes + prefix
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package secret
|
|
|
|
import (
|
|
"crypto/aes"
|
|
"crypto/cipher"
|
|
"crypto/rand"
|
|
"crypto/sha256"
|
|
"encoding/base64"
|
|
"encoding/hex"
|
|
"errors"
|
|
"io"
|
|
)
|
|
|
|
// 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, 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, 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("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, 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 "", 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 "", err
|
|
}
|
|
plaintext, err := AesDecrypt(keyHash[:], ciphertext)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return string(plaintext), nil
|
|
}
|