using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Management;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace SmartScanner
{
    class LBProtect
    {
        //私钥
        private static readonly string privateKey = "<RSAKeyValue><Modulus>zM7HeOAK8nORTQ56zl4IInkg7Y5k3Zf2FtXaHwu4nSCJOdWmABnbIbTlIt9y9gmLnDHG0maUXlaxZrbUGeAScrmI6kD4qlDypf9qKO7iB5K9xf0MD7ecioeljLXJtG8ahPo6pqiyg9Sx0Czue2pg672ssPtbGL81iFrgwy+Zgok=</Modulus><Exponent>AQAB</Exponent><P>zUb5vO3p4iqncynb+WGVyO1d73M/bXrqLG7cCaZN4gk7XxeWWyfIk2flCCI2veAdp4MKpdG3j4W+Y7+8xq5fzw==</P><Q>/2oalvvC/i1YtJNGCZk4+k83asfBZZpElTp/t+U4FC8vGGKE8slfBzflSps8PTJ67/MKZ8sgD0pW9Vp2e4j2Jw==</Q><DP>sU5v4edh0C9liUyLq2DFvtKAA5Z5H7g+UnjC6DbUKLwuoxk9jqjTT7c6lYbv35uYIZtHdCirs3UjGQeBJ99v8w==</DP><DQ>taKxEhosSzHYWWI6dmz+dhOLp2YzBJw2laEqXo6l2MTNSxwUy8ukxq9bYjkPF74kayt9hN6RCA6n1Ifmpmd6FQ==</DQ><InverseQ>AxT3HFNQY9mBI/fe68ACR56ARDIUCXb62REnjbJDA0/7Ti/n5NN+yaELwVDZpw2LVlqePyYdmMJgUAJGBjHl4A==</InverseQ><D>YtiRsScAYY+hWv1YC+2aI3kuiTimOcSzwsWnpkAz87HWSRFyMq5H8nap+DC7/T8SIGptuPJFPVq9+ALZTzuz6siESv1EtND58nyrR6HnUKXlhiGuoG9vXL2rP71BnZA+H+lnIFrG48orFKP/8kA2Hy9cP9l4b1pBXEZJHQHG1hk=</D></RSAKeyValue>";

        private static readonly RSACryptoServiceProvider cryptoServiceProvider = new RSACryptoServiceProvider();

        // 解密
        public static string RsaDecrypt(string textRsa)
        {
            cryptoServiceProvider.FromXmlString(privateKey);
            byte[] inputBytes = Convert.FromBase64String(textRsa);
            byte[] decryptedBytes = cryptoServiceProvider.Decrypt(inputBytes, false);
            return Encoding.UTF8.GetString(decryptedBytes);
        }


        // 获取硬件指纹
        public static string GetHardwareFingerprint()
        {
            StringBuilder sb = new StringBuilder();

            // CPU ID
            sb.Append(GetWmiInfo("Win32_Processor", "ProcessorId"));

            // 主板序列号
            sb.Append(GetWmiInfo("Win32_BaseBoard", "SerialNumber"));

            // 主硬盘序列号
            sb.Append(GetFixedDiskSerialNumber());

            // 计算SHA256哈希
            using (SHA256 sha256 = SHA256.Create())
            {
                byte[] hash = sha256.ComputeHash(Encoding.UTF8.GetBytes(sb.ToString()));
                return BitConverter.ToString(hash).Replace("-", "").Substring(0, 16);
            }
        }

        private static string GetWmiInfo(string className, string propertyName)
        {
            try
            {
                using (ManagementClass mc = new ManagementClass(className))
                using (ManagementObjectCollection moc = mc.GetInstances())
                {
                    foreach (ManagementObject mo in moc)
                    {
                        return mo[propertyName]?.ToString() ?? string.Empty;
                    }
                }
            }
            catch { }
            return string.Empty;
        }

        // 验证硬件指纹
        public static bool ValidateFingerprint()
        {
            string sRsaVal = "";
            string currentConfigDirectory = Directory.GetCurrentDirectory() + "\\config";
            string currentFingerprint = GetHardwareFingerprint();

            try
            {
                if (!Directory.Exists(currentConfigDirectory))
                    Directory.CreateDirectory(currentConfigDirectory);

                string sRsa = File.ReadAllText(currentConfigDirectory + "\\" + currentFingerprint + ".lic");
                sRsaVal = RsaDecrypt(sRsa);
            }
            catch
            { }

            bool bSame = true;
            if (currentFingerprint != sRsaVal)
            {
                bSame = false;
                File.WriteAllText(currentConfigDirectory + "\\MachineId.txt", currentFingerprint);
            }


            return bSame;
        }
        // 获取固定硬盘序列号（排除可移动设备）
        private static string GetFixedDiskSerialNumber()
        {
            try
            {
                // 查找固定硬盘
                using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT SerialNumber, MediaType FROM Win32_DiskDrive WHERE MediaType = 'Fixed hard disk media'"))
                using (ManagementObjectCollection moc = searcher.Get())
                {
                    foreach (ManagementObject mo in moc)
                    {
                        string serialNumber = mo["SerialNumber"]?.ToString()?.Trim() ?? string.Empty;
                        if (!string.IsNullOrEmpty(serialNumber))
                            return serialNumber;
                    }
                }

                // 查找非USB接口的设备
                using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT SerialNumber, InterfaceType FROM Win32_DiskDrive WHERE InterfaceType != 'USB'"))
                using (ManagementObjectCollection moc = searcher.Get())
                {
                    foreach (ManagementObject mo in moc)
                    {
                        string serialNumber = mo["SerialNumber"]?.ToString()?.Trim() ?? string.Empty;
                        if (!string.IsNullOrEmpty(serialNumber))
                            return serialNumber;
                    }
                }
            }
            catch { }

            return string.Empty;
        }


    }
}