using System;
using System.Security.Cryptography;
using System.Text;
using UnityEngine;
using System.IO;
using System.Globalization;
public class Learn : MonoBehaviour
{
private static readonly byte[] Key = Encoding.UTF8.GetBytes("abcdefghijklmnop"); // 密钥，16个字节
private static readonly byte[] IV = Encoding.UTF8.GetBytes("1234567890abcdef"); // 初始化向量，16个字节
string path;
//当前年、月、日、时、分、秒
float curYear, curMonth, curDay, curHours, curMin, curSec;
//截至XX年,XX月,XX日,XX时,XX分,XX秒
float year,month,day,hours,min,sec;
float startTime;
float internalTime;
string[] readContext=new string[2];
private void Awake()
{
path = Application.dataPath + "/Privacy_Timer.txt";
CreateTxtFile(path);
}
private void Start()
{
startTime = Time.unscaledTime;
WriteTxtFile(path);
//Debug.Log("Original Message: " + timer);
//string encryptedMessage = Encrypt(timer);
//Debug.Log("Encrypted Message: " + encryptedMessage);
//string decryptedMessage = Decrypt(encryptedMessage);
//Debug.Log("Decrypted Message: " + decryptedMessage);
}
private void Update()
{
internalTime = Time.unscaledTime - startTime;//获取程序运行的时间
SetTimeValue(path, internalTime);
CompareWithTime();
}
void CompareWithTime()
{
if (curYear > year)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curYear < year)
{
return;
}
else if (curYear == year)
{
if (curMonth > month)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curMonth < month)
{
return;
}
else if (curMonth == month)
{
if (curDay > day)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curDay < day)
{
return;
}
else if (curDay == day)
{
if (curHours > hours)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curHours < hours)
{
return;
}
else if (curHours == hours)
{
if (curMin > min)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curMin < min)
{
return;
}
else if (curMin == min)
{
if (curSec > sec)
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#endif
#if UNITY_STANDALONE_WIN
Application.Quit();
#endif
}
else if (curSec <= sec)
{
return;
}
}
}
}
}
}
}
//设置时间参数
void SetTimeValue(string path,float timer)
{
//当前时间
curYear = GetCurrentTime(path, timer, 0).Year;
curMonth= GetCurrentTime(path, timer, 0).Month;
curDay = GetCurrentTime(path, timer, 0).Day;
curHours = GetCurrentTime(path, timer, 0).Hour;
curMin = GetCurrentTime(path, timer, 0).Minute;
curSec = GetCurrentTime(path, timer, 0).Second;
//截至时间
year = GetCurrentTime(path, 0, 1).Year;
month = GetCurrentTime(path, 0, 1).Month;
day = GetCurrentTime(path, 0, 1).Day;
hours = GetCurrentTime(path, 0, 1).Hour;
min = GetCurrentTime(path, 0, 1).Minute;
sec = GetCurrentTime(path, 0, 1).Second;
}
void CreateTxtFile(string path)
{
if(!File.Exists(path))
{
File.Create(path);
}
}
DateTime ChangeStringToDateTime(string timer)
{
string format = "yyyy/M/d HH:mm:ss";
DateTime result = DateTime.ParseExact(timer, format, CultureInfo.InvariantCulture);
return result;
}
DateTime GetCurrentTime(string path,float timer,int index)
{
if(string.IsNullOrEmpty(readContext[0]))
{
readContext = File.ReadAllLines(path);
readContext[0] = Decrypt(readContext[0]);
readContext[1] = Decrypt(readContext[1]);
}
if (!string.IsNullOrEmpty(readContext[0]))
{
if(index==0)
{
return ChangeStringToDateTime(readContext[0]).AddSeconds(timer);
}
else
{
return ChangeStringToDateTime(readContext[1]);
}
}
return System.DateTime.Now;
}
//向文件中写入数据
void WriteTxtFile(string path)
{
if(File.Exists(path))
{
string[] contents = File.ReadAllLines(path,Encoding.UTF8);
if (contents.Length != 0)
{
contents[0] = Decrypt(contents[0]);
contents[1] = Decrypt(contents[1]);
DateTime start = ChangeStringToDateTime(contents[0]).AddSeconds(internalTime);
contents[0] = start.ToString();
contents[0] = Encrypt(contents[0]);
contents[1] = Encrypt(contents[1]);
File.WriteAllLines(path,contents,Encoding.UTF8);
}
else
{
contents = new string[2];
DateTime startDate = DateTime.Now; // 当前时间
DateTime endDate = startDate.AddDays(3); // 将startDate增加3天
contents[0] = startDate.ToString();
contents[1] = endDate.ToString();
contents[0] = Encrypt(contents[0]);
contents[1] = Encrypt(contents[1]);
File.WriteAllLines(path, contents, Encoding.UTF8);
}
}
}
//加密
public string Encrypt(string plainText)
{
byte[] encryptedBytes;
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (var msEncrypt = new System.IO.MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
encryptedBytes = msEncrypt.ToArray();
}
}
}
return Convert.ToBase64String(encryptedBytes);
}
//解密
public string Decrypt(string encryptedText)
{
byte[] cipherTextBytes = Convert.FromBase64String(encryptedText);
string plainText = null;
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (var msDecrypt = new System.IO.MemoryStream(cipherTextBytes))
{
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var srDecrypt = new System.IO.StreamReader(csDecrypt))
{
plainText = srDecrypt.ReadToEnd();
}
}
}
}
return plainText;
}
private void OnApplicationQuit()
{
WriteTxtFile(path);
}
}
参考：
(3条消息) Unity 设置软件使用期限，加密软件_unity 给程序添加时间锁_山中雨来了的博客-CSDN博客
