C# 用户硬件唯一信息

/// <summary>
/// 提供用户硬件唯一信息的辅助类
/// </summary>
public class FingerprintHelper
{
public static string Value()
{
return pack(cpuId()
+ biosId()
+ diskId()
+ baseId()
+ videoId()
+ macId());
}

//返回一个硬件标识符
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")
{

//仅获得第一个
if (result=="")
{
try
{
result = mo[wmiProperty].ToString();
break;
}
catch
{
}
}

}
}
return result;
}

//返回一个硬件标识符
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()
{
//使用优先顺序的第一个CPU标识，不要让所有的标识符，非常耗时
string retVal = identifier("Win32_Processor", "UniqueId");
if (retVal == "") //如果没有的UniqueID，使用ProcessorID
{
retVal = identifier("Win32_Processor", "ProcessorId");

if (retVal == "") //如果没有ProcessorId，使用名称
{
retVal = identifier("Win32_Processor", "Name");

if (retVal == "") //如果没有名称，使用制造商
{
retVal = identifier("Win32_Processor", "Manufacturer");
}

//添加额外的安全时钟速度
retVal +=identifier("Win32_Processor", "MaxClockSpeed");
}
}

return retVal;
}

//BIOS标识符
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");
}

//主要的物理硬盘驱动器ID
private static string diskId()
{
return identifier("Win32_DiskDrive", "Model")
+ identifier("Win32_DiskDrive", "Manufacturer")
+ identifier("Win32_DiskDrive", "Signature")
+ identifier("Win32_DiskDrive", "TotalHeads");
}

//主板ID
private static string baseId()
{
return identifier("Win32_BaseBoard", "Model")
+ identifier("Win32_BaseBoard", "Manufacturer")
+ identifier("Win32_BaseBoard", "Name")
+ identifier("Win32_BaseBoard", "SerialNumber");
}

//主视频控制器ID
private static string videoId()
{
return identifier("Win32_VideoController", "DriverVersion")
+ identifier("Win32_VideoController", "Name");
}

//首次启用的网卡ID
private static string macId()
{
return identifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled");
}

//包装至8位数字的字符串
private static string pack(string text)
{
string retVal;
int x = 0;
int y = 0;
foreach (char n in text)
{
y++;
x += (n*y);
}
retVal = x.ToString() + "00000000";

return retVal.Substring(0, 8);
}
}