cfb_encrypt

// https://bruinsslot.jp/post/golang-crypto/
var bytes = []byte{35, 46, 57, 24, 85, 35, 24, 74, 87, 35, 88, 98, 66, 32, 14, 05}

const DefaultSecret string = "abc&1*~#^2^#s0^=)^^7%b34"

func encode(b []byte) string {
  return base64.StdEncoding.EncodeToString(b)
}
func decode(s string) []byte {
  data, err := base64.StdEncoding.DecodeString(s)
  if err != nil {
  panic(err)
  }
  return data
}

// Encrypt method is to encrypt or hide any classified text
func Encrypt(text, secret string) (string, error) {
  block, err := aes.NewCipher([]byte(secret))
  if err != nil {
  return "", err
  }
  plainText := []byte(text)
  cfb := cipher.NewCFBEncrypter(block, bytes)
  cipherText := make([]byte, len(plainText))
  cfb.XORKeyStream(cipherText, plainText)
  return encode(cipherText), nil
}

// Decrypt method is to extract back the encrypted text
func Decrypt(text, secret string) (string, error) {
  block, err := aes.NewCipher([]byte(secret))
  if err != nil {
  return "", err
  }
  cipherText := decode(text)
  cfb := cipher.NewCFBDecrypter(block, bytes)
  plainText := make([]byte, len(cipherText))
  cfb.XORKeyStream(plainText, cipherText)
  return string(plainText), nil
}