public string Decrypt()
{
foreach (var ch in encryptedMessage.Trim().Split(' '))
{
var res = BigInteger.ModPow(int.Parse(ch), d, n);
decryptedMessage += Alphabet.GetCharRSA(((int)res + n) % n);
}
return(decryptedMessage);
}
public string Encrypt()
{
foreach (var ch in message)
{
int charIndex = Alphabet.GetCharCodeRSA(ch);
maxCharCode = charIndex > maxCharCode ? charIndex : maxCharCode;
if (maxCharCode >= n)
{
throw new Exception($"Индекс буквы {Alphabet.GetCharRSA(maxCharCode)} = {maxCharCode} больше/равно n = {n}");
}
var res = BigInteger.ModPow(charIndex, e, n);
encryptedMessage += res + " ";
}
return(encryptedMessage);
}