private static void DeserializeFrom(BinaryReader reader, out FiniteFieldPolynomial x, out FiniteFieldPolynomial y)
{
int x_i = (int)reader.ReadVarInt();
int expectedByteCount = (int)reader.ReadVarInt();
byte[] y_b = reader.ReadBytes(expectedByteCount);
IrreduciblePolynomial irp = new IrreduciblePolynomial(expectedByteCount * 8);
x = new FiniteFieldPolynomial(irp, x_i);
y = new FiniteFieldPolynomial(irp, y_b.ToBigIntegerFromBigEndianUnsignedBytes());
}
private static void DeserializeFrom(BinaryReader reader, out FiniteFieldPolynomial x, out FiniteFieldPolynomial y)
{
int x_i = (int)reader.ReadVarInt(int.MaxValue);
byte[] y_b = reader.ReadVarBytes();
IrreduciblePolynomial irp = new IrreduciblePolynomial(y_b.Length * 8);
x = new FiniteFieldPolynomial(irp, x_i);
y = new FiniteFieldPolynomial(irp, y_b.ToBigIntegerFromBigEndianUnsignedBytes());
}
public FiniteFieldPolynomial(IrreduciblePolynomial primePolynomial, params int[] setCoefficients)
{
_PrimePolynomial = primePolynomial;
_PolynomialSetCoefficients = BigInteger.Zero;
for (int i = 0; i < setCoefficients.Length; i++)
{
_PolynomialSetCoefficients = _PolynomialSetCoefficients.SetBit(setCoefficients[i]);
}
}
public FiniteFieldPolynomial(IrreduciblePolynomial primePolynomial, params int[] setCoefficients)
{
_PrimePolynomial = primePolynomial;
_PolynomialSetCoefficients = BigInteger.Zero;
for (int i = 0; i < setCoefficients.Length; i++)
{
_PolynomialSetCoefficients = _PolynomialSetCoefficients.SetBit(setCoefficients[i]);
}
}
private static IEnumerable<FiniteFieldPolynomial> GetRandomPolynomials(IrreduciblePolynomial irreduciblePolynomial, int total)
{
var rng = RandomNumberGenerator.Create();
for (int i = 0; i < total; i++)
{
var randomCoefficientBytes = new byte[irreduciblePolynomial.SizeInBytes];
rng.GetBytes(randomCoefficientBytes);
yield return new FiniteFieldPolynomial(irreduciblePolynomial, randomCoefficientBytes.ToBigIntegerFromLittleEndianUnsignedBytes());
}
}
private static void DeserializeFrom(BinaryReader reader, out FiniteFieldPolynomial x, out FiniteFieldPolynomial y)
{
int x_i = (int)reader.ReadVarInt();
int expectedByteCount = (int)reader.ReadVarInt();
byte[] y_b = reader.ReadBytes(expectedByteCount);
IrreduciblePolynomial irp = new IrreduciblePolynomial(expectedByteCount * 8);
x = new FiniteFieldPolynomial(irp, x_i);
y = new FiniteFieldPolynomial(irp, y_b.ToBigIntegerFromBigEndianUnsignedBytes());
}
public static bool TryParse(string s, out FiniteFieldPoint result)
{
var match = Regex.Match(s, @"(?<x>[0-9]+)-(?<y>[0-9a-fA-F]+)");
if (!match.Success)
{
result = null;
return false;
}
try
{
var xString = match.Groups["x"].Value.ToLowerInvariant();
var yString = match.Groups["y"].Value.ToLowerInvariant();
// Each hex letter makes up 4 bits, so to get the degree in bits
// we multiply by 4
int polynomialDegree = yString.Length * 4;
var irp = new IrreduciblePolynomial(polynomialDegree);
var x = new FiniteFieldPolynomial(irp, BigInteger.Parse(xString));
// get bytes
var bigEndianBytes = new byte[yString.Length / 2];
for (int i = 0; i < yString.Length; i += 2)
{
bigEndianBytes[i / 2] = Byte.Parse(yString.Substring(i, 2), NumberStyles.HexNumber);
}
var y = new FiniteFieldPolynomial(irp, bigEndianBytes.ToBigIntegerFromBigEndianUnsignedBytes());
result = new FiniteFieldPoint(x, y);
return true;
}
catch
{
result = null;
return false;
}
}
public static bool TryParse(string s, out FiniteFieldPoint result)
{
var match = Regex.Match(s, @"(?<x>[0-9]+)-(?<y>[0-9a-fA-F]+)");
if (!match.Success)
{
result = null;
return(false);
}
try
{
var xString = match.Groups["x"].Value.ToLowerInvariant();
var yString = match.Groups["y"].Value.ToLowerInvariant();
// Each hex letter makes up 4 bits, so to get the degree in bits
// we multiply by 4
int polynomialDegree = yString.Length * 4;
var irp = new IrreduciblePolynomial(polynomialDegree);
var x = new FiniteFieldPolynomial(irp, BigInteger.Parse(xString));
// get bytes
var bigEndianBytes = new byte[yString.Length / 2];
for (int i = 0; i < yString.Length; i += 2)
{
bigEndianBytes[i / 2] = Byte.Parse(yString.Substring(i, 2), NumberStyles.HexNumber);
}
var y = new FiniteFieldPolynomial(irp, bigEndianBytes.ToBigIntegerFromBigEndianUnsignedBytes());
result = new FiniteFieldPoint(x, y);
return(true);
}
catch
{
result = null;
return(false);
}
}
public void Deserialize(BinaryReader reader)
{
int x = (int)reader.ReadVarInt();
int expectedByteCount = (int)reader.ReadVarInt();
byte[] y = reader.ReadBytes(expectedByteCount);
IrreduciblePolynomial irp = new IrreduciblePolynomial(expectedByteCount * 8);
this.X = new FiniteFieldPolynomial(irp, x);
this.Y = new FiniteFieldPolynomial(irp, y.ToBigIntegerFromBigEndianUnsignedBytes());
}
public FiniteFieldPolynomial(IrreduciblePolynomial primePolynomial, BigInteger polynomial)
{
_PrimePolynomial = primePolynomial;
_PolynomialSetCoefficients = polynomial;
}
public FiniteFieldPolynomial(IrreduciblePolynomial primePolynomial, BigInteger polynomial)
{
_PrimePolynomial = primePolynomial;
_PolynomialSetCoefficients = polynomial;
}
public SplitSecret(int threshold, IrreduciblePolynomial irreduciblePolynomial, FiniteFieldPolynomial[] allCoefficients)
{
Threshold = threshold;
_IrreduciblePolynomial = irreduciblePolynomial;
_AllCoefficients = allCoefficients;
}
