/// <summary>
/// calculates the password verifier (v)
/// </summary>
/// <param name="ri">a sha1 hash of USERNAME:PASSWORD</param>
/// <returns>true on success otherwise false if s is faulty</returns>
public bool CalculateVerifier(string ri)
{
var salt = BigIntegerExtensions.GenerateRandom(SaltByteSize);
var saltStr = salt.ToHexString();
return(CalculateVerifier(ri, saltStr));
}
/// <summary>
/// calculates the host public ephemeral (B), generates also a random number as host private ephemeral (b)
/// </summary>
public void CalculateHostPublicEphemeral()
{
b = BigIntegerExtensions.GenerateRandom(19);
var gMod = g.ModPow(b, N);
B = ((v * 3) + gMod) % N;
}