/// <summary>
/// Constructs a new FeatureLicenseData object from the given product key, using the passed Machine identifier to
/// decrypt it's contents.
/// </summary>
/// <param name="fromproductcode"></param>
/// <param name="IDString"></param>
public ProductKey(String fromproductcode, String IDString)
: this()
{
//remove any hyphens/dashes, first.
MachineID = IDString;
fromproductcode = fromproductcode.Replace("-", "");
//convert the string to a byte array via zBase32:
ZBase32Encoder zb = new ZBase32Encoder();
byte[] acquiredcode = zb.Decode(fromproductcode);
//byte[] acquiredcode = Enumerable.Range(0, fromproductcode.Length)
// .Where(x => x % 2 == 0)
// .Select(x => Convert.ToByte(fromproductcode.Substring(x, 2), 16))
// .ToArray();
//now, we need to decrypt it...
byte[] decrypted = Decrypt(acquiredcode, MachineID);
//armed with the decrypted data, toss it into a memory stream
MemoryStream ms = new MemoryStream(decrypted);
ms.Seek(0, SeekOrigin.Begin);
//now, invoke FromStream...
FromStream(ms);
}
/// <summary>
/// Creates a ProductCode, or Key, from the data stored in this class and the MachineID.
/// </summary>
/// <returns></returns>
public String GetProductCode()
{
MemoryStream mstream = new MemoryStream();
//first, write our data out to a memorystream.
DataToStream(mstream);
//seek to the start, read as a string.
mstream.Seek(0, SeekOrigin.Begin);
//read it back, as a array of bytes.
Byte[] readdata = new byte[mstream.Length];
mstream.Read(readdata, 0, readdata.Length);
//Encrypt the array of bytes using the MachineID. this is set in the constructor to getLocalMachineID(), but can of course
//be changed by the caller before calling GetProductCode (for example, for generating the key elsewhere)
Byte[] encrypted = Encrypt(readdata, MachineID);
//now we need a readable form, so encode using zBase32, which has
//good results for a human readable key.
ZBase32Encoder zb = new ZBase32Encoder();
return(zb.Encode(encrypted).ToUpper());
}
