/// <summary>
/// Dycrypts a nut.
/// </summary>
/// <returns>
/// The data encrypted into the nut.
/// </returns>
/// <param name='key'>
/// The encryption key.
/// </param>
/// <param name='iv'>
/// The initialization vector for the Rijndael cipher.
/// </param>
/// <param name='nut'>
/// The nut.
/// </param>
public NutData DecryptNut(byte[] key, byte[] iv, byte[] nut)
{
var nutStruct = new NutStruct();
nutStruct.SetBytes(_aesHandler.Decrypt(key, iv, nut));
return new NutData(nutStruct);
}
/// <summary>
/// Gets the nut struct.
/// </summary>
/// <returns>
/// The nut struct.
/// </returns>
public NutStruct GetNutStruct()
{
var nutStruct = new NutStruct();
// test for IPv4 or IPv6
if (Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
nutStruct.Address = BitConverter.ToUInt32(Address.GetAddressBytes(), 0);
}
else if (Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
{
var sha = SHA256Managed.Create();
// TODO: I may have to think about how to salt this hash
var hash = sha.ComputeHash(Address.GetAddressBytes());
nutStruct.Address = BitConverter.ToUInt32(new ArraySegment <byte>(hash, 0, 8).Array, 0);
}
else
{
throw new Exception("Unknown IP Address Family");
}
nutStruct.Timestamp = (UInt32)(Timestamp - new DateTime(1970, 1, 1).ToLocalTime()).TotalSeconds;
nutStruct.Counter = Counter;
nutStruct.Entropy = BitConverter.ToUInt32(Entropy, 0);
return(nutStruct);
}
/// <summary>
/// Dycrypts a nut.
/// </summary>
/// <returns>
/// The data encrypted into the nut.
/// </returns>
/// <param name='key'>
/// The encryption key.
/// </param>
/// <param name='iv'>
/// The initialization vector for the Rijndael cipher.
/// </param>
/// <param name='nut'>
/// The nut.
/// </param>
public NutData DecryptNut(byte[] key, byte[] iv, byte[] nut)
{
var nutStruct = new NutStruct();
nutStruct.SetBytes(_aesHandler.Decrypt(key, iv, nut));
return(new NutData(nutStruct));
}
/// <summary>
/// Initializes a new instance of the <see cref="SqrlNet.Server.NutData"/> class.
/// </summary>
/// <param name='nutStruct'>
/// Nut struct.
/// </param>
public NutData(NutStruct nutStruct)
{
// convert the IP address
Address = new IPAddress(nutStruct.Address);
// convert the timestamp
Timestamp = new DateTime(1970, 1, 1, 0, 0, 0, 0);
Timestamp = Timestamp.AddSeconds(nutStruct.Timestamp).ToLocalTime();
Counter = nutStruct.Counter;
Entropy = BitConverter.GetBytes(nutStruct.Entropy);
}
/// <summary>
/// Initializes a new instance of the <see cref="SqrlNet.Server.NutData"/> class.
/// </summary>
/// <param name='nutStruct'>
/// Nut struct.
/// </param>
public NutData(NutStruct nutStruct)
{
// convert the IP address
Address = new IPAddress(nutStruct.Address);
// convert the timestamp
Timestamp = new DateTime(1970, 1, 1, 0, 0, 0, 0);
Timestamp = Timestamp.AddSeconds(nutStruct.Timestamp).ToLocalTime();
Counter = nutStruct.Counter;
Entropy = BitConverter.GetBytes(nutStruct.Entropy);
}
/// <summary>
/// Gets the nut struct.
/// </summary>
/// <returns>
/// The nut struct.
/// </returns>
public NutStruct GetNutStruct()
{
var nutStruct = new NutStruct();
// test for IPv4 or IPv6
if(Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
nutStruct.Address = BitConverter.ToUInt32(Address.GetAddressBytes(), 0);
}
else if(Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
{
var sha = SHA256Managed.Create();
// TODO: I may have to think about how to salt this hash
var hash = sha.ComputeHash(Address.GetAddressBytes());
nutStruct.Address = BitConverter.ToUInt32(new ArraySegment<byte>(hash, 0, 8).Array, 0);
}
else
{
throw new Exception("Unknown IP Address Family");
}
nutStruct.Timestamp = (UInt32) (Timestamp - new DateTime(1970, 1, 1).ToLocalTime()).TotalSeconds;
nutStruct.Counter = Counter;
nutStruct.Entropy = BitConverter.ToUInt32(Entropy, 0);
return nutStruct;
}
