private static void SimulateShamirExchange(BigInteger p, BigInteger cA, BigInteger cB, BigInteger m)
{
BigInteger dA, dB;
dA = ShamirTools.GenerateShamirPrivateKeyUsingAnother(p, cA);
Console.WriteLine($"dA = {dA}");
dB = ShamirTools.GenerateShamirPrivateKeyUsingAnother(p, cB);
Console.WriteLine($"dB = {dB}");
BigInteger x = m;
Console.WriteLine($"Message is {x}");
BigInteger y = CryptoTools.ModuloPower(x, cA, p);
Console.WriteLine($"Alice calculated y = {y} and sent it to Bob");
BigInteger z = CryptoTools.ModuloPower(y, cB, p);
Console.WriteLine($"Bob calculated z = {z} and sent it to Alice");
BigInteger u = CryptoTools.ModuloPower(z, dA, p);
Console.WriteLine($"Alice calculated u = {u} and sent it to Bob");
BigInteger w = CryptoTools.ModuloPower(u, dB, p);
Console.WriteLine($"Bob calculated w = {w}");
}
private static void SimulateShamirExchange(BigInteger p)
{
BigInteger cA, dA, cB, dB;
ShamirTools.GenerateShamirPrivateKeys(p, out cA, out dA);
Console.WriteLine($"Alice generated private keys cA = {cA}, dA = {dA}");
ShamirTools.GenerateShamirPrivateKeys(p, out cB, out dB);
Console.WriteLine($"Bob generated private keys cB = {cB}, dB = {dB}");
BigInteger x = -1;
do
{
Console.WriteLine("Please enter message, x < p");
string s = Console.ReadLine();
try
{
x = BigInteger.Parse(s);
}
catch (FormatException)
{
x = -1;
}
}while (x < 0 || x >= p);
Console.WriteLine($"Message is {x}");
BigInteger y = CryptoTools.ModuloPower(x, cA, p);
Console.WriteLine($"Alice calculated y = {y} and sent it to Bob");
BigInteger z = CryptoTools.ModuloPower(y, cB, p);
Console.WriteLine($"Bob calculated z = {z} and sent it to Alice");
BigInteger u = CryptoTools.ModuloPower(z, dA, p);
Console.WriteLine($"Alice calculated u = {u} and sent it to Bob");
BigInteger w = CryptoTools.ModuloPower(u, dB, p);
Console.WriteLine($"Bob calculated w = {w}");
}