public static string affineEncrypt(int a, int b, string input)
{
//E(a,b,x)=a*x+b (mod 26)
if (CryptographyUtils.gcd(a, CryptographyUtils.AlphabetLength) != 1)
{
Console.WriteLine("Niepoprawny klucz do enkrypcji");
return(null);
}
return(CryptographyUtils.encrypt(a, b, input));
}
public static bool checkAffineKey(int a, int range)
{
if ((CryptographyUtils.gcd(a, range) == 1) && ((a * (CryptographyUtils.oppositeModulo(a, range)) % range) == 1))
{
return(true);
}
else
{
return(false);
}
}
