public byte[] Encrypt(String str)
{
BigInteger2[] message = this.splitMessage(Encoding.UTF8.GetBytes(str), this.n - 1, "encrypt");
mess = new BigInteger2[message.Length];
mess = message;
//MessageBox.Show("Message Length: " + message.Length);
//return data;
ArrayList resultSet = new ArrayList();
GC.Collect();
//Encrypt each Message and populate resultSet
for (int i = 0; i < message.Length; i++)
{
BigInteger2 unitResult = BigIntegerExtensions.modPower(message[i], e, Mod);
unitResult = BigInteger2.NegateZeros(unitResult);
if (i == 0 && unitResult.bitlength.Length - 2 < n)
{
//MessageBox.Show("Padding with 'a'");
int ind = n + 4 - unitResult.bitlength.Length;
BigInteger2 tmp = new BigInteger2(n, 0);
for (int xi = ind, xj = 2; xj < unitResult.bitlength.Length; xi++, xj++)
{
tmp.bitlength[xi] = unitResult.bitlength[xj];
}
unitResult = tmp;
//PAD Left with byte 'a'
byte[] pad = ASCIIEncoding.ASCII.GetBytes("a");
BitArray padAry = new BitArray(pad);
//PAD left of unitResult with padAry
BigInteger2 padded = new BigInteger2(unitResult.bitlength.Length - 2 + padAry.Length, 0);
int pi, pj;
for (pi = 2, pj = 0; pj < padAry.Length; pi++, pj++)
{
padded.bitlength[pi] = padAry[pj];
}
//Continue filling from unitResult
for (int indi = pi, indj = 2; indi < padded.bitlength.Length; indi++, indj++)
{
padded.bitlength[indi] = unitResult.bitlength[indj];
}
unitResult = padded;
}
if (i > 0 && unitResult.bitlength.Length - 2 < n)
{
//MessageBox.Show("Padding with zeros");
//pad result's leftside with zeros
int ind = n + 4 - unitResult.bitlength.Length;
BigInteger2 tmp = new BigInteger2(n, 0);
for (int xi = ind, xj = 2; xj < unitResult.bitlength.Length; xi++, xj++)
{
tmp.bitlength[xi] = unitResult.bitlength[xj];
}
unitResult = null;
unitResult = tmp;
}
GC.Collect();
resultSet.Add(unitResult);
}
//Create Full BigInteger2 containing bits from resultSet BigIntegers
int bitSize = 0;
foreach (BigInteger2 b in resultSet)
{
bitSize += (b.bitlength.Length - 2);
}
BigInteger2 wholeMessage = new BigInteger2(bitSize, 0);
//Fill wholeMessage
int curIndex = 2;
foreach (BigInteger2 b in resultSet)
{
for (int i = 2; i < b.bitlength.Length; i++, curIndex++)
{
wholeMessage.bitlength[curIndex] = b.bitlength[i];
}
}
byte[] result = BigInteger2.getKeyBytes(wholeMessage);
GC.Collect();
// MessageBox.Show("Encryption Completed!!!");
return(result);
}
public byte[] getPrivateKey()
{
d = BigInteger2.NegateZeros(d);
return(BigInteger2.getKeyBytes(d));
}
public byte[] getModValue()
{
return(BigInteger2.getKeyBytes(Mod));
}
public byte[] getPublicKey()
{
e = BigInteger2.NegateZeros(e);
return(BigInteger2.getKeyBytes(e));
}