private bool _IsValid()
{
//Dim _a As New methods ' is only here to provide the geteighthashcode method
try
{
if (string.IsNullOrEmpty(m_res))
{
decodeKeyToString();
string _decodedHash = m_res.Substring(0, 9);
string _calculatedHash = m_methods.getEightByteHash(m_res.Substring(9, m_res.Length - 9)).ToString().Substring(0, 9);
// changed Math.Abs(_res.Substring(0, 17).GetHashCode).ToString.Substring(0, 8)
//When the hashcode is calculated, it cannot be taken for sure,
//that the same hash value will be generated.
//learn more about this issue: http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx
if (_decodedHash == _calculatedHash)
{
return(true);
}
else
{
//reset the decoded string
m_res = "";
return(false);
}
}
else
{
//_res contains decrypted valid key - so this is valid
return(true);
}
}
catch (Exception)
{
//if something goes wrong, for example, when decrypting,
//this function will return false, so that user knows that it is unvalid.
//if the key is valid, there won't be any errors.
return(false);
}
}
private static int getMachineCode()
{
//This code will generate a 5 digits long key, finger print, of the system
//where this method is being executed. However, that might be changed in the
//hash function "GetStableHash", by changing the amount of zeroes in
//MUST_BE_LESS_OR_EQUAL_TO to the one you want to have. Ex 1000 will return
//3 digits long hash.
methods m = new methods();
//string collectedInfo = System.Environment.MachineName;
string collectedInfo = string.Empty;
var x = new List <string>();
//取得CPU ID;//
ManagementObjectSearcher SearchCPU = new ManagementObjectSearcher(@"SELECT * FROM Win32_Processor");
foreach (ManagementObject Win32ProcessObj in SearchCPU.Get())
{
// 取得CPU 序號
if (Win32ProcessObj["ProcessorId"] != null)
{
x.Add(Win32ProcessObj["ProcessorId"].ToString());
}
}
x.Sort();
collectedInfo += string.Join("", x);
x.Clear();
//取得Bios UUID;//
ManagementObjectSearcher SearchSystemProduct = new ManagementObjectSearcher(@"root\CIMV2", "SELECT * FROM Win32_ComputerSystemProduct");
foreach (ManagementObject SystemObj in SearchSystemProduct.Get())
{
if (SystemObj["UUID"] != null)
{
x.Add(SystemObj["UUID"].ToString().Replace("-", ""));
}
}
x.Sort();
collectedInfo += string.Join("", x);
x.Clear();
//取得網卡MAC 碼;//
//var Name = new List<string>();
//foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
//{
// // probably need to do some filtering on ni.NetworkInterfaceType here
// //collectedInfo += ni.GetPhysicalAddress();
// x.Add(ni.GetPhysicalAddress().ToString());
// Name.Add(ni.Name);
//}
//x.Sort();
//collectedInfo += x[x.Count - 1];
//x.Clear();
ManagementObjectSearcher SearchPhysicalMedia = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");
foreach (ManagementObject wmi_HD in SearchPhysicalMedia.Get())
{
// get the hardware serial no.
if (wmi_HD["SerialNumber"] == null &&
wmi_HD["Removable"] == null &&
wmi_HD["Replaceable"] == null)
{
// Don't add
}
else
{
//serialNo = wmi_HD["SerialNumber"].ToString();
//hotSwap = Convert.ToBoolean(wmi_HD["HotSwappable"]);
//Console.WriteLine(hotSwap);
x.Add(wmi_HD["SerialNumber"].ToString());
}
}
x.Sort();
collectedInfo += string.Join("", x);
//表示都沒有取到設備的識別序號，直接給定一個值;//
if (collectedInfo.Length <= 0)
{
collectedInfo = "productmachine";
}
int LessThan = Convert.ToInt32(Math.Pow(10, BaseConfiguration.MachineCodeMaxDigit));
return(m.getEightByteHash(collectedInfo, LessThan));
}