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 Identifier
105 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 ID
116 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 ID
125 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 ID
134 private static string videoId()
135 {
136 return identifier("Win32_VideoController", "DriverVersion")
137 + identifier("Win32_VideoController", "Name");
138 }
139
140 //First enabled network card ID
141 private static string macId()
142 {
143 return identifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled");
144 }
145
146 //Packs the string to 8 digits
147 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 }
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