/// <summary>
/// Generates the link key from the specified Installation Code
/// </summary>
/// <param name="installationCode">The installation Code</param>
/// <returns>The resulting Link Key</returns>
// Revision History
// MM/DD/YY Who Version Issue# Description
// -------- --- ------- ------ -------------------------------------------
// 08/30/11 RCG 2.52.10 Created
public static byte[] GenerateLinkKey(byte[] installationCode)
{
byte[] LinkKey = null;
if (installationCode != null)
{
switch (installationCode.Length)
{
case 8:
case 10:
case 14:
case 18:
{
CrcHelper CrcHelper = new CrcHelper(CrcAlgorithmType.Crc16Ccitt);
ushort CRC = (ushort)(installationCode[installationCode.Length - 2] + (installationCode[installationCode.Length - 1] << 8));
byte[] Code = new byte[installationCode.Length - 2];
Array.Copy(installationCode, Code, Code.Length);
// Validate the CRC
if (CRC == CrcHelper.CalculateCrc(Code))
{
LinkKey = MMOHash(Code);
}
else
{
throw new ArgumentException("The provided installation code has an invalid CRC.", "installationCode");
}
break;
}
default:
{
throw new ArgumentException("The provided installation code is invalid.", "installationCode");
}
}
}
else
{
throw new ArgumentNullException("installationCode", "The Installation Code may not be null");
}
return(LinkKey);
}
/// <summary>
/// Generates a new Install Code with the specified length
/// </summary>
/// <param name="size">The size of the Install Code to generate</param>
/// <returns>The new install code</returns>
// Revision History
// MM/DD/YY Who Version Issue# Description
// -------- --- ------- ------ -------------------------------------------
// 08/30/11 RCG 2.52.10 Created
public static byte[] GenerateInstallCode(InstallCodeSize size)
{
RNGCryptoServiceProvider RandomGenerator = new RNGCryptoServiceProvider();
byte[] NewCode = new byte[(int)size];
byte[] InstallCode = new byte[(int)size + 2];
CrcHelper CrcHelper = new CrcHelper(CrcAlgorithmType.Crc16Ccitt);
ushort CRC = 0;
RandomGenerator.GetBytes(NewCode);
CRC = (ushort)CrcHelper.CalculateCrc(NewCode);
Array.Copy(NewCode, 0, InstallCode, 0, NewCode.Length);
InstallCode[InstallCode.Length - 2] = (byte)CRC;
InstallCode[InstallCode.Length - 1] = (byte)(CRC >> 8);
return(InstallCode);
}