c#获取机器唯一识别码

前言

在客户端认证的过程中，我们总要获取客户机的唯一识别信息，曾经以为MAC地址是不会变的，但是现在各种改，特别是使用无线上网卡，MAC地址插一次变一次，所以这样使用MAC就没有什么意义了，怎么办，又开始求助Google，最后找到一个折中的方案

原理

通过获取主板、处理器、BIOS、mac、显卡、硬盘等的ID生成唯一识别码

建议

1、使用那些不经常更换的模块来生成识别码。

2、如果经常更换MAC，显卡，硬盘，则不要使用这些ID。

3、确保使用static变量在整个应用来保存唯一识别码。

实现

using System;using System.Management;using System.Security.Cryptography;using System.Security;using System.Collections;using System.Text;namespace Security{    /// <summary>    /// Generates a 16 byte Unique Identification code of a computer    /// Example: 4876-8DB5-EE85-69D3-FE52-8CF7-395D-2EA9    /// </summary>    public class FingerPrint      {        private static string fingerPrint = string.Empty;        public static string Value()        {            if (string.IsNullOrEmpty(fingerPrint))            {                fingerPrint = GetHash("CPU >> " + cpuId() + "\nBIOS >> " +             biosId() + "\nBASE >> " + baseId()                            //+"\nDISK >> "+ diskId() + "\nVIDEO >> " +             videoId() +"\nMAC >> "+ macId()                                     );            }            return fingerPrint;        }        private static string GetHash(string s)        {            MD5 sec = new MD5CryptoServiceProvider();            ASCIIEncoding enc = new ASCIIEncoding();            byte[] bt = enc.GetBytes(s);            return GetHexString(sec.ComputeHash(bt));        }        private static string GetHexString(byte[] bt)        {            string s = string.Empty;            for (int i = 0; i < bt.Length; i++)            {                byte b = bt[i];                int n, n1, n2;                n = (int)b;                n1 = n & 15;                n2 = (n >> 4) & 15;                if (n2 > 9)                    s += ((char)(n2 - 10 + (int)'A')).ToString();                else                    s += n2.ToString();                if (n1 > 9)                    s += ((char)(n1 - 10 + (int)'A')).ToString();                else                    s += n1.ToString();                if ((i + 1) != bt.Length && (i + 1) % 2 == 0) s += "-";            }            return s;        }        #region Original Device ID Getting Code        //Return a hardware identifier        private static string identifier        (string wmiClass, string wmiProperty, string wmiMustBeTrue)        {            string result = "";            System.Management.ManagementClass mc =         new System.Management.ManagementClass(wmiClass);            System.Management.ManagementObjectCollection moc = mc.GetInstances();            foreach (System.Management.ManagementObject mo in moc)            {                if (mo[wmiMustBeTrue].ToString() == "True")                {                    //Only get the first one                    if (result == "")                    {                        try                        {                            result = mo[wmiProperty].ToString();                            break;                        }                        catch                        {                        }                    }                }            }            return result;        }        //Return a hardware identifier        private static string identifier(string wmiClass, string wmiProperty)        {            string result = "";            System.Management.ManagementClass mc =         new System.Management.ManagementClass(wmiClass);            System.Management.ManagementObjectCollection moc = mc.GetInstances();            foreach (System.Management.ManagementObject mo in moc)            {                //Only get the first one                if (result == "")                {                    try                    {                        result = mo[wmiProperty].ToString();                        break;                    }                    catch                    {                    }                }            }            return result;        }        private static string cpuId()        {            //Uses first CPU identifier available in order of preference            //Don't get all identifiers, as it is very time consuming            string retVal = identifier("Win32_Processor", "UniqueId");            if (retVal == "") //If no UniqueID, use ProcessorID            {                retVal = identifier("Win32_Processor", "ProcessorId");                if (retVal == "") //If no ProcessorId, use Name                {                    retVal = identifier("Win32_Processor", "Name");                    if (retVal == "") //If no Name, use Manufacturer                    {                        retVal = identifier("Win32_Processor", "Manufacturer");                    }                    //Add clock speed for extra security                    retVal += identifier("Win32_Processor", "MaxClockSpeed");                }            }            return retVal;        }        //BIOS Identifier        private static string biosId()        {            return identifier("Win32_BIOS", "Manufacturer")            + identifier("Win32_BIOS", "SMBIOSBIOSVersion")            + identifier("Win32_BIOS", "IdentificationCode")            + identifier("Win32_BIOS", "SerialNumber")            + identifier("Win32_BIOS", "ReleaseDate")            + identifier("Win32_BIOS", "Version");        }        //Main physical hard drive ID        private static string diskId()        {            return identifier("Win32_DiskDrive", "Model")            + identifier("Win32_DiskDrive", "Manufacturer")            + identifier("Win32_DiskDrive", "Signature")            + identifier("Win32_DiskDrive", "TotalHeads");        }        //Motherboard ID        private static string baseId()        {            return identifier("Win32_BaseBoard", "Model")            + identifier("Win32_BaseBoard", "Manufacturer")            + identifier("Win32_BaseBoard", "Name")            + identifier("Win32_BaseBoard", "SerialNumber");        }        //Primary video controller ID        private static string videoId()        {            return identifier("Win32_VideoController", "DriverVersion")            + identifier("Win32_VideoController", "Name");        }        //First enabled network card ID        private static string macId()        {            return identifier("Win32_NetworkAdapterConfiguration",                 "MACAddress", "IPEnabled");        }        #endregion    }}

 

参考

http://www.codeproject.com/Articles/28678/Generating-Unique-Key-Finger-Print-for-a-Computer

 

补充

现在遇到一些平板等简陋的机型，竟然获取到的所有设备标识都一样（除了mac），最后只好在本地再生成一个软件自身的标识，然后每次在计算标识的时候附带上，这样不会再重复了吧。

代码如下:

        private static string localkey()        {            string path=Environment.CurrentDirectory + "client.key";            if (File.Exists(path))            {                StreamReader sr = new StreamReader(path);                string key= sr.ReadToEnd();                sr.Close();                return key;            }            else            {                StreamWriter sw = File.CreateText(path);                string key = Guid.NewGuid().ToString();                sw.WriteLine(key);                sw.Close();                return key;            }        }

可以再把该文件设为隐藏等手段，防止用户误操作。