private static void Combine()
{
if (!Arguments.QuietMode)
{
Console.WriteLine("Enter {0} shares separated by newlines:", Arguments.Threshold);
}
int polynomialDegree = -1;
var totalShares = new List <string>();
for (int i = 0; i < Arguments.Threshold; i++)
{
if (!Arguments.QuietMode)
{
Console.Write("Share [{0}/{1}]: ", i + 1, Arguments.Threshold);
}
string currentShare = String.Empty;
try {
currentShare = Console.ReadLine();
}
catch {
Fatal("I/O error while reading shares");
}
SecretShare share;
if (!SecretShare.TryParse(currentShare, out share))
{
Fatal("invalid syntax");
}
if (polynomialDegree < 0)
{
polynomialDegree = share.Point.Y.PrimePolynomial.Degree;
if (!IrreduciblePolynomial.IsValidDegree(polynomialDegree))
{
Fatal("share has illegal length");
}
}
else if (polynomialDegree != share.Point.Y.PrimePolynomial.Degree)
{
Fatal("shares have different security levels");
}
totalShares.Add(currentShare);
}
Diffuser diffuser = new NullDiffuser();
if (Arguments.EnableDiffusion)
{
if (polynomialDegree >= 64)
{
diffuser = new XteaDiffuser();
}
else
{
Warning("security level too small for the diffusion layer");
}
}
var recoveredSecret = SecretCombiner.Combine(totalShares, diffuser);
if (!Arguments.QuietMode)
{
Console.Error.Write("Resulting secret: ");
}
Console.Error.WriteLine(Arguments.HexMode ? recoveredSecret.RecoveredHexString : recoveredSecret.RecoveredTextString);
}
