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using UnityEngine;
using System.Collections;
using System.Security.Cryptography;
using System.Text;
public class EncryptedPlayerPrefs {
// Encrypted PlayerPrefs
// Written by Sven Magnus
// MD5 code by Matthew Wegner (from [url]http://www.unifycommunity.com/wiki/index.php?title=MD5[/url])
// Modify this key in this file :
private static string privateKey="9ETrEsWaFRach3gexaDr";
// Add some values to this array before using EncryptedPlayerPrefs
public static string[] keys;
public static string Md5(string strToEncrypt) {
UTF8Encoding ue = new UTF8Encoding();
byte[] bytes = ue.GetBytes(strToEncrypt);
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] hashBytes = md5.ComputeHash(bytes);
string hashString = "";
for (int i = 0; i < hashBytes.Length; i++) {
hashString += System.Convert.ToString(hashBytes[i], 16).PadLeft(2, '0');
}
return hashString.PadLeft(32, '0');
}
public static void SaveEncryption(string key, string type, string value) {
int keyIndex = (int)Mathf.Floor(Random.value * keys.Length);
string secretKey = keys[keyIndex];
string check = Md5(type + "_" + privateKey + "_" + secretKey + "_" + value);
PlayerPrefs.SetString(key + "_encryption_check", check);
PlayerPrefs.SetInt(key + "_used_key", keyIndex);
}
public static bool CheckEncryption(string key, string type, string value) {
int keyIndex = PlayerPrefs.GetInt(key + "_used_key");
string secretKey = keys[keyIndex];
string check = Md5(type + "_" + privateKey + "_" + secretKey + "_" + value);
if(!PlayerPrefs.HasKey(key + "_encryption_check")) return false;
string storedCheck = PlayerPrefs.GetString(key + "_encryption_check");
return storedCheck == check;
}
public static void SetInt(string key, int value) {
PlayerPrefs.SetInt(key, value);
SaveEncryption(key, "int", value.ToString());
}
public static void SetFloat(string key, float value) {
PlayerPrefs.SetFloat(key, value);
SaveEncryption(key, "float", Mathf.Floor(value*1000).ToString());
}
public static void SetString(string key, string value) {
PlayerPrefs.SetString(key, value);
SaveEncryption(key, "string", value);
}
public static int GetInt(string key) {
return GetInt(key, 0);
}
public static float GetFloat(string key) {
return GetFloat(key, 0f);
}
public static string GetString(string key) {
return GetString(key, "");
}
public static int GetInt(string key,int defaultValue) {
int value = PlayerPrefs.GetInt(key);
if(!CheckEncryption(key, "int", value.ToString())) return defaultValue;
return value;
}
public static float GetFloat(string key, float defaultValue) {
float value = PlayerPrefs.GetFloat(key);
if(!CheckEncryption(key, "float", Mathf.Floor(value*1000).ToString())) return defaultValue;
return value;
}
public static string GetString(string key, string defaultValue) {
string value = PlayerPrefs.GetString(key);
if(!CheckEncryption(key, "string", value)) return defaultValue;
return value;
}
public static bool HasKey(string key) {
return PlayerPrefs.HasKey(key);
}
public static void DeleteKey(string key) {
PlayerPrefs.DeleteKey(key);
PlayerPrefs.DeleteKey(key + "_encryption_check");
PlayerPrefs.DeleteKey(key + "_used_key");
}
}
@yasinjavaid

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commented Apr 18, 2017

thanks (Y)

@juanpaexpedite

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commented Jun 5, 2018

Fantastic, I'll give a try

@chiuan

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commented Mar 29, 2019

nice support! good job

@hakkikonu

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commented Aug 21, 2019

can you show function call examples on a real case

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