Unity C#加密错误

Question

我写一个统一的实际游戏，我想用这个代码来保护GameData。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;
using System.Text;
using System.Security.Cryptography;
using System.Linq;

public class Data : MonoBehaviour {

static readonly string PasswordHash = "P@@Sw0rd";
static readonly string SaltKey = "S@LT&KEY";
static readonly string VIKey = "@1B2c3D4e5F6g7H8";

public GameObject dirtBlock;

public void Save(){

    BinaryFormatter bf = new BinaryFormatter();
    FileStream file = File.Open(Application.persistentDataPath + "/playerData.dat",FileMode.Open);

    PlayerData data = new PlayerData();
    data.dirtCount = dirtBlock.GetComponent<BlockHandler>().blockCount;
    data.stoneCount = 0;
    data.ironCount = 0;

    bf.Serialize(file,Encrypt(ToByteArray(data)));
    file.Close();

}

public void Load(){

    if(File.Exists(Application.persistentDataPath + "/playerData.dat")){

        BinaryFormatter bf = new BinaryFormatter();
        FileStream file = File.Open(Application.persistentDataPath + "/playerData.dat",FileMode.Open);
        PlayerData data = FromByteArray<PlayerData>(Decrypt(bf.Deserialize(file).ToString()));
        file.Close();

        dirtBlock.GetComponent<BlockHandler>().blockCount = data.dirtCount;

    } else {
        FileStream file = File.Create(Application.persistentDataPath + "/playerData.dat");
        file.Close();
        this.Save();
        this.Load();
    }

}

public static string Encrypt(byte[] plainTextBytes){

    byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
    var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };
    var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));

    byte[] cipherTextBytes;

    using (var memoryStream = new MemoryStream()){

        using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write)){

            cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
            cryptoStream.FlushFinalBlock();
            cipherTextBytes = memoryStream.ToArray();
            cryptoStream.Close();

        }

        memoryStream.Close();

    }

    return Convert.ToBase64String(cipherTextBytes);

}

public static byte[] Decrypt(string encryptedText){

    byte[] cipherTextBytes = Convert.FromBase64String(encryptedText);
    byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
    var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.None };

    var decryptor = symmetricKey.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
    var memoryStream = new MemoryStream(cipherTextBytes);
    var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
    byte[] plainTextBytes = new byte[cipherTextBytes.Length];

    memoryStream.Close();
    cryptoStream.Close();
    return plainTextBytes;

}


public byte[] ToByteArray<T>(T obj){

    if(obj == null){
        return null;
    }
    BinaryFormatter bf = new BinaryFormatter();
    using(MemoryStream ms = new MemoryStream()){
        bf.Serialize(ms, obj);
        return ms.ToArray();
    }
}

public T FromByteArray<T>(byte[] data){
    if(data == null){
        return default(T);
    }

    BinaryFormatter bf = new BinaryFormatter();
    using(MemoryStream ms = new MemoryStream(data)){
        object obj = bf.Deserialize(ms);
        return (T)obj;
    }
}

}

[System.Serializable]
public class PlayerData {

public float dirtCount;
public float stoneCount;
public float ironCount;

}

昨天它工作正常，但今天，我不知道为什么，我得到这个错误消息

序列化异常：意外的二进制元素：0系统。运行时。序列化。格式。二进制。对象读者。读者对象（二进制元素，系统。IO。二进制读者，系统。int64

我在网上搜索了4个小时，但我找不到这个问题的解决方案。我希望有人能帮助我。

Answer 1

在对您的代码进行了一些测试之后，我最终得到了这两种方法。

我认为你的代码的主要问题是解密，它从来没有对明文字节-数组做过任何事情。

private static string Encrypt(byte[] plainTextBytes)
{
    byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
    var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };
    var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));

    byte[] cipherTextBytes;

    using (var memoryStream = new MemoryStream())
    {
        using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
        {
            cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
            cryptoStream.FlushFinalBlock();
            cipherTextBytes = memoryStream.ToArray();
        }
    }

    return Convert.ToBase64String(cipherTextBytes);
}

解密

public static byte[] Decrypt(string base64)
{
    byte[] cipherTextBytes = Convert.FromBase64String(base64);
    byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
    var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.None };

    var decryptor = symmetricKey.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
    using (var memoryStream = new MemoryStream(cipherTextBytes))
    {
        using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
        {
            using (BinaryReader srDecrypt = new BinaryReader(cryptoStream))
            {
                return srDecrypt.ReadBytes(cipherTextBytes.Length);
            }
        }
    }
}