C＃ - 从流中序列化/反序列化DES加密文件

Does anyone have any examples of how to encrypt serialized data to a file and then read it back using DES?

有没有人有任何关于如何将序列化数据加密到文件然后使用DES读回来的例子?

I've written some code already that isn't working, but I'd rather see a fresh attempt instead of pursuing my code.

我已经编写了一些不起作用的代码,但我宁愿看到新的尝试而不是追求我的代码。

EDIT: Sorry, forgot to mention I need an example using XmlSerializer.Serialize/Deserialize.

编辑:对不起,忘了提到我需要一个使用XmlSerializer.Serialize / Deserialize的例子。

3 个解决方案

#1

Encryption

public static void EncryptAndSerialize(string filename, MyObject obj, SymmetricAlgorithm key)
{
    using(FileStream fs = File.Open(filename, FileMode.Create))
    {
        using(CryptoStream cs = new CryptoStream(fs, key.CreateEncryptor(), CryptoStreamMode.Write))
        {
            XmlSerializer xmlser = new XmlSerializer(typeof(MyObject));
            xmlser.Serialize(cs, obj); 
        }
    }
}

Decryption:

public static MyObject DecryptAndDeserialize(string filename, SymmetricAlgorithm key)    
{
    using(FileStream fs = File.Open(filename, FileMode.Open))
    {
        using(CryptoStream cs = new CryptoStream(fs, key.CreateDecryptor(), CryptoStreamMode.Read))
        {
            XmlSerializer xmlser = new XmlSerializer(typeof(MyObject));
            return (MyObject) xmlser.Deserialize(cs);
        }
    }
}

Usage:

DESCryptoServiceProvider key = new DESCryptoServiceProvider();
MyObject obj = new MyObject();
EncryptAndSerialize("testfile.xml", obj, key);
MyObject deobj = DecryptAndDeserialize("testfile.xml", key);

You need to change MyObject to whatever the type of your object is that you are serializing, but this is the general idea. The trick is to use the same SymmetricAlgorithm instance to encrypt and decrypt.

您需要将MyObject更改为您正在序列化的对象类型,但这是一般的想法。诀窍是使用相同的SymmetricAlgorithm实例进行加密和解密。

#2

This thread gave the basic idea. Here's a version that makes the functions generic, and also allows you to pass an encryption key so it's reversible.

这个帖子给出了基本的想法。这是一个使函数具有通用性的版本,并且还允许您传递加密密钥以使其可逆。

public static void EncryptAndSerialize<T>(string filename, T obj, string encryptionKey) {
  var key = new DESCryptoServiceProvider();
  var e = key.CreateEncryptor(Encoding.ASCII.GetBytes("64bitPas"), Encoding.ASCII.GetBytes(encryptionKey));
  using (var fs = File.Open(filename, FileMode.Create))
  using (var cs = new CryptoStream(fs, e, CryptoStreamMode.Write))
      (new XmlSerializer(typeof (T))).Serialize(cs, obj);
}

public static T DecryptAndDeserialize<T>(string filename, string encryptionKey) {
  var key = new DESCryptoServiceProvider();
  var d = key.CreateDecryptor(Encoding.ASCII.GetBytes("64bitPas"), Encoding.ASCII.GetBytes(encryptionKey));
  using (var fs = File.Open(filename, FileMode.Open))
  using (var cs = new CryptoStream(fs, d, CryptoStreamMode.Read))
      return (T) (new XmlSerializer(typeof (T))).Deserialize(cs);
}

#3

Here is an example of DES encryption/decription for a string.

以下是字符串的DES加密/解密的示例。

#1