public bool Decipher(string route, out byte[] Message, RSAkey PrivateKey)
{
List <byte> toReturn = new List <byte>();
using (FileStream fs = File.OpenRead(route))
{
using (BinaryReader reader = new BinaryReader(fs))
{
int counter = 0;
while (counter < fs.Length)
{
byte[] ByteArray = reader.ReadBytes(24);
int iterations = 1;
for (int i = 0; i < ByteArray.Length;)
{
List <byte> toDecimal = new List <byte>();
for (int k = i; k < 8 * iterations; k++)
{
toDecimal.Add(ByteArray[k]);
i++;
}
iterations++;
string Decimal = Encoding.ASCII.GetString(toDecimal.ToArray());
BigInteger toBinary = CihperByte(Convert.ToInt32(Decimal, 16), PrivateKey);
toReturn.Add(Convert.ToByte((int)toBinary));
}
counter += 24;
}
}
}
Message = toReturn.ToArray();
return(true);
}
public bool GetKeys(int p_Number, int q_Number, out RSAkey PrivateKey, out RSAkey PublicKey)
{
if (IsPrimeNumber(p_Number) && IsPrimeNumber(q_Number))
{
BigInteger N_number = p_Number;
N_number = N_number * q_Number;
if (N_number > int.MaxValue)
{
PrivateKey = null;
PublicKey = null;
return(false);
}
if (N_number < 255)
{
PrivateKey = null;
PublicKey = null;
return(false);
}
phi = (p_Number - 1);
phi = phi * (q_Number - 1);
if (phi > 2)
{
Get_e();
if (e_number != -1)
{
Get_d();
if (d == e_number)
{
d += N_number;
}
PrivateKey = new RSAkey();
PrivateKey.modulus = N_number;
PrivateKey.power = d;
PublicKey = new RSAkey();
PublicKey.modulus = N_number;
PublicKey.power = e_number;
return(true);
}
else
{
PrivateKey = null;
PublicKey = null;
return(false);
}
}
else
{
PrivateKey = null;
PublicKey = null;
return(false);
}
}
else
{
PrivateKey = null;
PublicKey = null;
return(false);
}
}
public bool Cipher(string route, out byte[] cipheredMsg, RSAkey PublicKey)
{
StringBuilder sb = new StringBuilder();
using (FileStream fs = File.OpenRead(route))
{
using (BinaryReader reader = new BinaryReader(fs))
{
int counter = 0;
while (counter < fs.Length)
{
byte[] ByteArray = reader.ReadBytes(3);
for (int i = 0; i < ByteArray.Length; i++)
{
BigInteger toBinary = CihperByte(ByteArray[i], PublicKey);
string Binary = Convert.ToString((int)toBinary, 16);
sb.Append(Binary.PadLeft(8, '0'));
}
counter += 3;
}
}
}
cipheredMsg = Encoding.ASCII.GetBytes(sb.ToString());
return(true);
}
public BigInteger CihperByte(int toCipher, RSAkey key)
{
BigInteger res = BigInteger.ModPow(toCipher, key.power, key.modulus);
return(res);
}
