protected virtual bool ExtractClientInfo(ref LicenseInfo Client, string key)
{
string code = DeInterleave(key);
if (code == null)
{
m_errorMsg = "Invalid key length.";
Client.Clear();
return false;
}
if (code.Length != m_codeLength)
{
//this should never be reached, but was added while debugging
m_errorMsg = "Invalid code length.";
Client.Clear();
return false;
}
int version = AlphaDecode(key.Substring(0, 1)); //first character of the key is always the version
if (version != m_version)
{
m_errorMsg = "Invalid license key.";
Client.Clear();
return false;
}
//character 0 was the version, 1 is tier, 2 & 3 are toolFlags
Client.tier = AlphaDecode(code.Substring(1, 1));
Client.toolFlags = (byte)AlphaDecode(code.Substring(2, 2));
Client.clientAlias = UnMangleClientAliasAlpha(code.Substring(4));
SetTierMaximums(ref Client);
Client.key = key;
return true;
}
private bool ValidateClient(ref LicenseInfo Client, string clientAlias, string key)
{
if (!CleanText(ref clientAlias, m_clientAliasLength)) return false;
if (!ExtractClientInfo(ref Client, key)) return false;//fill client info from the provided key
//recalculate the key using the provided clientAlias
string calcKey = CalcLicenseKey(clientAlias, Client.tier, Client.toolFlags);
//compare client IDs and keys
//string tempID = clientAlias.Substring(0, Client.clientAlias.Length); //Not needed because of clean...
if ((!calcKey.Equals(key)) || (!clientAlias.Equals(Client.clientAlias)))
{
m_errorMsg = "Invalid key or client ID.";
//invalid clients are disabled, but left in list, so keep client ID...
Client.Clear();
Client.clientAlias = clientAlias;
return false;
}
//Check to see if this client can use this tool
if (!IsToolAllowed(Client, ToolType))
{
m_errorMsg = "License is not authorized for this product.";
Client.isValid = false;
//key is valid in general, just not for this tool, so leave toolFlags etc alone
return false;
}
Client.isValid = true;
return true;
}
public LicenseInfo GetLicenseInfo(string clientAlias)
{
LicenseInfo Client = new LicenseInfo();
Client.Clear(); //empty client response will signal error
int index = GetLicenseIndex(clientAlias);
if (index < 0) //unable to find client in list;
{
//error message compiled in GetLicenseIndex
return Client;
}
// invalid clients are disabled, but left in list, so need to check here...
if (!m_clientList[index].isValid) //invalid client (bad key or not authorized for this tool)
{
//error message compiled in GetLicenseIndex
return Client;
}
//valid client
Client.Copy(m_clientList[index]);
Client.key = ""; //do not release the key externally
return Client;
}