73 lines
2.9 KiB
C#
73 lines
2.9 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using System.IO;
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using System.Text;
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using System.Security.Cryptography;
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namespace MoreMountains.Tools
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{
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/// <summary>
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/// An interface to implement save and load using different methods (binary, json, etc)
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/// </summary>
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public interface IMMSaveLoadManagerMethod
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{
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void Save(object objectToSave, FileStream saveFile);
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object Load(System.Type objectType, FileStream saveFile);
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}
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/// <summary>
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/// The possible methods to save and load files to and from disk available in the MMSaveLoadManager
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/// </summary>
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public enum MMSaveLoadManagerMethods { Json, JsonEncrypted, Binary, BinaryEncrypted };
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/// <summary>
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/// This class implements methods to encrypt and decrypt streams
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/// </summary>
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public abstract class MMSaveLoadManagerEncrypter
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{
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/// <summary>
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/// The Key to use to save and load the file
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/// </summary>
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public string Key { get; set; } = "yourDefaultKey";
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protected string _saltText = "SaltTextGoesHere";
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/// <summary>
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/// Encrypts the specified input stream into the specified output stream using the key passed in parameters
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/// </summary>
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/// <param name="inputStream"></param>
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/// <param name="outputStream"></param>
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/// <param name="sKey"></param>
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protected virtual void Encrypt(Stream inputStream, Stream outputStream, string sKey)
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{
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RijndaelManaged algorithm = new RijndaelManaged();
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Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sKey, Encoding.ASCII.GetBytes(_saltText));
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algorithm.Key = key.GetBytes(algorithm.KeySize / 8);
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algorithm.IV = key.GetBytes(algorithm.BlockSize / 8);
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CryptoStream cryptostream = new CryptoStream(inputStream, algorithm.CreateEncryptor(), CryptoStreamMode.Read);
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cryptostream.CopyTo(outputStream);
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}
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/// <summary>
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/// Decrypts the input stream into the output stream using the key passed in parameters
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/// </summary>
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/// <param name="inputStream"></param>
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/// <param name="outputStream"></param>
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/// <param name="sKey"></param>
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protected virtual void Decrypt(Stream inputStream, Stream outputStream, string sKey)
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{
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RijndaelManaged algorithm = new RijndaelManaged();
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Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sKey, Encoding.ASCII.GetBytes(_saltText));
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algorithm.Key = key.GetBytes(algorithm.KeySize / 8);
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algorithm.IV = key.GetBytes(algorithm.BlockSize / 8);
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CryptoStream cryptostream = new CryptoStream(inputStream, algorithm.CreateDecryptor(), CryptoStreamMode.Read);
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cryptostream.CopyTo(outputStream);
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}
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}
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}
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