public byte[] Generate(int degree, byte input)
{
var polynomial = new byte[degree + 1];
do
{
_rng.GetBytes(polynomial);
} while (Degree(polynomial) != degree);
polynomial[0] = input;
return(polynomial);
}
public IEnumerable <byte[]> Split(byte[] secret, int parts, int minimum)
{
var values = new byte[parts][];
var length = secret.Length;
for (var i = 0; i < parts; i++)
{
values[i] = new byte[length];
}
for (var i = 0; i < length; i++)
{
var polynomial = _gf256.Generate(minimum - 1, secret[i]);
for (var j = 0; j < parts; j++)
{
values[j][i] = _gf256.Evaluate(polynomial, (byte)(j + 1));
}
}
var result = new List <byte[]>();
for (var i = 0; i < parts; i++)
{
var value = new byte[length + 1];
_rng.GetBytes(value);
// Note, this is to make the output look more random, but limits parts to 16
value[0] = (byte)((value[0] & 0xF0) + i + 1);
Array.Copy(values[i], 0, value, 1, length);
result.Add(value);
}
return(result);
}
public static double GetDouble(this IRng rng) => BitConverter.ToDouble(rng.GetBytes(8), 0);
public static long GetInt64(this IRng rng)
{
var bytes = rng.GetBytes(8);
return(BitConverter.ToInt64(bytes, 0));
}
public static int GetInt32(this IRng rng)
{
var bytes = rng.GetBytes(4);
return(BitConverter.ToInt32(bytes, 0));
}