接收加密/rsa：解密文件时出现解密错误

这是我的解密函数，但它不断返回：“crypto/rsa：解密错误”。任何意见将是有益的！我将加密分成几个部分，因为密钥不断引发“密钥太短错误”。我是 golang 加密工作的新手。

func DecryptFile(file string, privateKey *rsa.PrivateKey)([]byte, error){
  var decryptedBytes []byte
  // read the file into bytes
  data, err := ioutil.ReadFile(file)
  if err != nil {
    return decryptedBytes,err
  }
  fmt.Println(len(data))
  var decryptedByte []byte
  ByteSlice := split(data,200)
  rng := rand.Reader
  for _,bytes := range ByteSlice{
    decryptedBytes,err = rsa.DecryptOAEP(
      sha256.New(),
      rng,
      privateKey,
      bytes,
      nil)
    if err != nil {
     return decryptedBytes,err
    }
    decryptedBytes = append(decryptedBytes,decryptedByte...)
  }

  return decryptedBytes,nil
}

加密功能：

func EncryptFile(file string, PublicKey *rsa.PublicKey)([]byte, error){
  var encryptedBytes []byte

  // read the file into bytes
  data, err := ioutil.ReadFile(file)
  if err != nil {
    return encryptedBytes,err
  }
  fmt.Println(len(data))
  // Encrypts the file
  //fmt.Println(PublicKey.N.BitLen())
  //_,_ = strconv.Atoi((PublicKey.N).String())
  ByteSlice := split(data,200)
  var encryptedByte []byte
  rng := rand.Reader
  for _,bytes := range ByteSlice{
    encryptedByte, err = rsa.EncryptOAEP(
         sha256.New(),
         rng,
         PublicKey,
         bytes,
         nil)
    if err != nil {
      return encryptedBytes,err
    }
    encryptedBytes = append(encryptedBytes, encryptedByte...)
  }

  // Returns file encrypted
  return encryptedBytes,nil
}