public AlgorithmRsa(int bits, string modulus, string exponent)
{
try
{
_nBits = bits;
var xx = Convert.FromBase64String(exponent);
_pExponent = new BigIntegerFixed(Convert.FromBase64String(exponent));
_pModulus = new BigIntegerFixed(Convert.FromBase64String(modulus));
}
catch (Exception ex)
{
throw new ArgumentException("Missed data for RSA algorithm", ex);
}
}
public byte[] Encrypt(byte[] data, bool isPadding = true)
{
var toEncrypt = data;
if (isPadding)
{
toEncrypt = AddPadding(data, _nBits);
}
var src = new BigIntegerFixed(toEncrypt);
var res = src.ModPow(_pExponent, _pModulus);
var bytesResult = res.getBytes();
if (!isPadding)
{
//need to remove padding
bytesResult = RemovePadding(bytesResult);
}
return(bytesResult);
}