/// <summary>
/// Creates a SHA256 string from the Client Hello Header
/// </summary>
/// <param name="ch"><see cref="ClientHelloHeader"/> the client hello header containing all information</param>
/// <returns><see cref="SHA256"/> represented as a string</returns>
public static String CreateSha(ClientHelloHeader ch)
{
String input = ch.ClientIP + ch.ClientUTCTime + ch.ClientVersion + ch.SizeInBytes;
String now = DateTime.Now.ToString();
String nowUTC = DateTime.UtcNow.ToString();
input = now + input + nowUTC;
input = new string(input.ToCharArray().OrderBy(x => Guid.NewGuid()).ToArray());
using (SHA256 hash = SHA256Managed.Create())
{
return(string.Concat(hash
.ComputeHash(Encoding.UTF8.GetBytes(input))
.Select(item => item.ToString("x2"))));
}
}
/// <summary>
/// Gets the existing sha of the pending order
/// </summary>
/// <param name="chh"><see cref="ClientHelloHeader"/> containing all the information needed</param>
/// <returns><see cref="SHA256"/> of pending order</returns>
private static string GetExistingSha(ClientHelloHeader chh)
{
return(StorageProvider.GetInstance().GetSHAOfExistingOrder(chh.ClientIP));
}
/// <summary>
/// Decides if the client can place a new order
/// </summary>
/// <param name="ch"><see cref="ClientHelloHeader"/> the client hello header containing all information</param>
/// <returns>true if the client does not have any pending orders</returns>
private static bool DecideAproval(ClientHelloHeader ch)
{
return(!StorageProvider.GetInstance().ClientHasOrder(ch.ClientIP));
}
