private bool isLicenseForCurrentMachine(string license, string appId)
{
IntPtr licensePtr = IntPtr.Zero;
try
{
byte[] licenseData = Convert.FromBase64String(license);
licensePtr = Marshal.AllocHGlobal(licenseData.Length);
Marshal.Copy(licenseData, 0, licensePtr, licenseData.Length);
foreach (string hdId in EncryptHelper.GetHardwareIdMD5())
{
IntPtr hdIdPtr = Marshal.StringToHGlobalAnsi(hdId);
int nRet = LicenseAPI.IsLicenseForCurrentMachine(licensePtr, licenseData.Length, hdIdPtr);
Marshal.FreeHGlobal(hdIdPtr);
if (nRet != 0)
{
return(true);
}
}
}
finally
{
if (licensePtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(licensePtr);
}
}
return(false);
}
public bool IsTrialVersion(string gadgetId)
{
string encryptGadgetId = EncryptHelper.GetMD5Hash(gadgetId);
if (this.gadgetLicenseDictionary.ContainsKey(encryptGadgetId))
{
string licenseString = this.gadgetLicenseDictionary[encryptGadgetId];
byte[] licenseData = Convert.FromBase64String(licenseString);
IntPtr licensePtr = Marshal.AllocHGlobal(licenseData.Length);
Marshal.Copy(licenseData, 0, licensePtr, licenseData.Length);
return(LicenseAPI.IsTrialVersion(licensePtr, licenseData.Length) != 0);
}
return(false);
}
internal static IEnumerable <string> DecryptLicenseFile(string decryptString)
{
string decryptKey = string.Empty;
foreach (char c in GetLicensePassword())
{
decryptKey += c;
}
byte[] passwordData = Convert.FromBase64String(decryptKey);
IntPtr passwordPtr = Marshal.AllocHGlobal(passwordData.Length);
Marshal.Copy(passwordData, 0, passwordPtr, passwordData.Length);
IntPtr decryptPtr = LicenseAPI.DecryptPassword(passwordPtr, passwordData.Length);
Marshal.FreeHGlobal(passwordPtr);
byte[] decryptData = new byte[8];
Marshal.Copy(decryptPtr, decryptData, 0, 8);
decryptKey = Encoding.ASCII.GetString(decryptData);
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
List <byte> rgbIVList = new List <byte>();
foreach (byte key in GetKeys())
{
rgbIVList.Add(key);
}
byte[] rgbIV = Enumerable.ToArray <byte>(rgbIVList);
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
string ret = Encoding.UTF8.GetString(mStream.ToArray());
cStream.Close();
mStream.Close();
yield return(ret);
}