123 lines
5.2 KiB
C#
123 lines
5.2 KiB
C#
using System;
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using System.Reflection;
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using System.Security.Cryptography;
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using System.Text;
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using Microsoft.Win32;
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namespace ShrlAlgoStudio
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{
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internal class LicenseManager
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{
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// 【重要】替换为你生成的公钥
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public static string PublicKey = @"<RSAKeyValue><Modulus>rd5+EjU6QxaTY/AalU9g6ugAquN0ahJSgeahnf2CrfvUAWFNJ+SH7Qr0RcvOTyAbWfvLWoBDACKaPsg+8nRQcO3EZdFyjJ9oycLNrw38+gSB2+/79Axys/8MHtSXVUw9WN2e9LxeHOQGtcaoSsp+bPGaXswthovQ2CkvBTmCokcAOX6UaR7Av4npaXyEoGCUsZLEiSydMsNbQ+wLsumVg1H2o/cpkO0s4DiJHoF66zUuxA+pYSjSCn5KTUsOemf+gBsob6Sw+7WOToyiOkMdO9Op6esf8yL7DJ1Yd40XaKd5IeLQmEX/b+n1EV2JEkGO0p9q9MQRp6NrEc9LvfMJWQ==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
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private static string RegPath = @$"Software\{Assembly.GetExecutingAssembly().GetName()}\License";
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/// <summary>
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/// 校验结果枚举
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/// </summary>
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public enum AuthStatus { Valid, Expired, HardwareMismatch, TimeTampered, InvalidSignature, NoLicense }
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/// <summary>
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/// 核心验证方法
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/// </summary>
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public static (AuthStatus status, string msg) Validate()
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{
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string licenseKey = LoadReg("Key");
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if (string.IsNullOrEmpty(licenseKey)) return (AuthStatus.NoLicense, "未激活");
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try
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{
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// 格式：签名|机器码|发码日期|过期日期
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var parts = licenseKey.Split('|');
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if (parts.Length != 4) return (AuthStatus.InvalidSignature, "授权格式错误");
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string signature = parts[0];
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string mCode = parts[1];
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string issueDateStr = parts[2];
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string expiryDateStr = parts[3];
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// 1. 硬件校验
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if (mCode != HardwareInfo.GetMachineCode())
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return (AuthStatus.HardwareMismatch, "机器码不匹配，请联系管理员");
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// 2. RSA 签名校验 (防止篡改日期)
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string dataVerify = $"{mCode}|{issueDateStr}|{expiryDateStr}";
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if (!VerifyRSA(dataVerify, signature))
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return (AuthStatus.InvalidSignature, "非法授权 (签名无效)");
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// 3. 时间逻辑校验
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DateTime issueDate = DateTime.ParseExact(issueDateStr, "yyyyMMdd", null);
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DateTime expiryDate = DateTime.ParseExact(expiryDateStr, "yyyyMMdd", null);
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DateTime now = TimeHelper.GetTrustedTime(); // 获取可信时间
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// 3.1 检查是否早于发码日期 (防极度回滚)
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if (now < issueDate)
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return (AuthStatus.TimeTampered, "系统时间异常：早于授权发码时间");
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// 3.2 检查上次运行记录 T (防短期回滚)
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long lastRunTicks = 0;
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long.TryParse(LoadReg("T"), out lastRunTicks);
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if (lastRunTicks > 0)
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{
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DateTime lastRun = new DateTime(lastRunTicks);
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// 允许1小时的误差
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if (now < lastRun.AddHours(-1))
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return (AuthStatus.TimeTampered, "系统时间异常：检测到时间倒流");
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}
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// 3.3 检查过期
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if (now.Date > expiryDate.Date)
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return (AuthStatus.Expired, $"授权已于 {expiryDate:yyyy-MM-dd} 到期");
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// --- 验证通过 ---
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SaveReg("T", now.Ticks.ToString()); // 更新痕迹
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return (AuthStatus.Valid, $"授权有效，到期时间为{expiryDate:yyyy-MM-dd}");
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}
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catch
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{
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return (AuthStatus.InvalidSignature, "授权解析异常");
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}
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}
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// 保存激活码
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public static void Activate(string keyInput)
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{
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SaveReg("Key", keyInput);
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}
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// RSA 验签辅助
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private static bool VerifyRSA(string data, string signature)
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{
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try
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{
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using (var rsa = new RSACryptoServiceProvider())
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{
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rsa.FromXmlString(PublicKey);
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var formatter = new RSAPKCS1SignatureDeformatter(rsa);
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formatter.SetHashAlgorithm("SHA256");
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byte[] dataBytes = Encoding.UTF8.GetBytes(data);
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byte[] signBytes = Convert.FromBase64String(signature);
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using (var sha = SHA256.Create())
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{
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return formatter.VerifySignature(sha.ComputeHash(dataBytes), signBytes);
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}
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}
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}
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catch { return false; }
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}
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#region 注册表底层
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private static void SaveReg(string key, string val)
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{
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using (var r = Registry.CurrentUser.CreateSubKey(RegPath)) r.SetValue(key, val);
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}
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private static string LoadReg(string key)
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{
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using (var r = Registry.CurrentUser.OpenSubKey(RegPath)) return r?.GetValue(key)?.ToString();
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}
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public static void RemoveLicense()
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{
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using (var r = Registry.CurrentUser.OpenSubKey(RegPath, true)) r?.DeleteValue("Key", false);
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}
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#endregion
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}
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} |