1 using System;  2 using System.Collections.Generic;  3 using System.Text;  4    5 namespace  Commons  6 {  7     /// <summary>  8     /// 提供用户硬件唯一信息的辅助类  9     /// </summary> 10     public class FingerprintHelper 11     { 12         public static string Value() 13         { 14             return pack(cpuId() 15                     + biosId() 16                     + diskId() 17                     + baseId() 18                     + videoId() 19                     + macId()); 20         } 21   22         //Return a hardware identifier 23         private static string identifier(string wmiClass, string wmiProperty, string wmiMustBeTrue) 24         { 25             string result=""; 26             System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass); 27             System.Management.ManagementObjectCollection moc = mc.GetInstances(); 28             foreach (System.Management.ManagementObject mo in moc) 29             { 30                 if (mo[wmiMustBeTrue].ToString()=="True") 31                 { 32   33                     //Only get the first one 34                     if (result=="") 35                     { 36                         try 37                         { 38                             result = mo[wmiProperty].ToString(); 39                             break; 40                         } 41                         catch 42                         { 43                         } 44                     } 45   46                 } 47             } 48             return result; 49         } 50   51         //Return a hardware identifier 52         private static string identifier(string wmiClass, string wmiProperty) 53         { 54             string result=""; 55             System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass); 56             System.Management.ManagementObjectCollection moc = mc.GetInstances(); 57             foreach (System.Management.ManagementObject mo in moc) 58             { 59   60                 //Only get the first one 61                 if (result=="") 62                 { 63                     try 64                     { 65                         result = mo[wmiProperty].ToString(); 66                         break; 67                     } 68                     catch 69                     { 70                     } 71                 } 72   73             } 74             return result; 75         } 76   77         private static string cpuId() 78         { 79             //Uses first CPU identifier available in order of preference 80             //Don‘t get all identifiers, as very time consuming 81             string retVal = identifier("Win32_Processor", "UniqueId"); 82             if (retVal=="") //If no UniqueID, use ProcessorID 83             { 84                 retVal = identifier("Win32_Processor", "ProcessorId"); 85   86                 if (retVal=="") //If no ProcessorId, use Name 87                 { 88                     retVal = identifier("Win32_Processor", "Name"); 89   90   91                     if (retVal=="") //If no Name, use Manufacturer 92                     { 93                         retVal = identifier("Win32_Processor", "Manufacturer"); 94                     } 95   96                     //Add clock speed for extra security 97                     retVal +=identifier("Win32_Processor", "MaxClockSpeed"); 98                 } 99             }100  101             return retVal;102         }103  104         //BIOS Identifier105         private static string biosId()106         {107             return identifier("Win32_BIOS", "Manufacturer")108                     + identifier("Win32_BIOS", "SMBIOSBIOSVersion")109                     + identifier("Win32_BIOS", "IdentificationCode")110                     + identifier("Win32_BIOS", "SerialNumber")111                     + identifier("Win32_BIOS", "ReleaseDate")112                     + identifier("Win32_BIOS", "Version");113         }114  115         //Main physical hard drive ID116         private static string diskId()117         {118             return identifier("Win32_DiskDrive", "Model")119                     + identifier("Win32_DiskDrive", "Manufacturer")120                     + identifier("Win32_DiskDrive", "Signature")121                     + identifier("Win32_DiskDrive", "TotalHeads");122         }123  124         //Motherboard ID125         private static string baseId()126         {127             return identifier("Win32_BaseBoard", "Model")128                     + identifier("Win32_BaseBoard", "Manufacturer")129                     + identifier("Win32_BaseBoard", "Name")130                     + identifier("Win32_BaseBoard", "SerialNumber");131         }132  133         //Primary video controller ID134         private static string videoId()135         {136             return identifier("Win32_VideoController", "DriverVersion")137                     + identifier("Win32_VideoController", "Name");138         }139  140         //First enabled network card ID141         private static string macId()142         {143             return identifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled");144         }145  146         //Packs the string to 8 digits147         private static string pack(string text)148         {149             string retVal;150             int x = 0;151             int y = 0;152             foreach (char n in text)153             {154                 y++;155                 x += (n*y);156             }157             retVal = x.ToString() + "00000000";158  159             return retVal.Substring(0, 8);160         }161     }162 }