public char[] GetText()
{
string ret = "";
int msgSize = this.GetMsgSize();
int numOfBits = msgSize * 8;
List <bool> bits = new List <bool>();
byte[] bytes;
Color clr = new Color();
bool done = false;
for (int i = this.w; i < this.bmp.Width; i++)
{
for (int j = this.h + 1; j < this.bmp.Height; j++)
{
if (numOfBits < 3)
{
clr = this.bmp.GetPixel(i, j);
if (numOfBits == 2)
{
bits.Add(BitManipulator.GetBit(clr.R, 1));
bits.Add(BitManipulator.GetBit(clr.G, 1));
}
else if (numOfBits == 1)
{
bits.Add(BitManipulator.GetBit(clr.R, 1));
}
done = true;
numOfBits -= 3;
break;
}
else
{
clr = this.bmp.GetPixel(i, j);
bits.Add(BitManipulator.GetBit(clr.R, 1));
bits.Add(BitManipulator.GetBit(clr.G, 1));
bits.Add(BitManipulator.GetBit(clr.B, 1));
numOfBits -= 3;
}
}
if (done)
{
break;
}
}
//bytes = BitManipulator.BoolToByte(bits.ToArray());
//char[] charArray = Encoding.ASCII.GetString(bytes).ToCharArray();
//Array.Reverse(charArray);
byte[] ints = BitManipulator.BoolToByte(bits.ToArray());
//char[] chars = BitManipulator.IntsToChar(ints);
char[] chars = BitManipulator.BytesToChars(ints);
Array.Reverse(chars);
return(chars);
}
private string Decryption(char[] encyptedMessage)
{
string OriginalMessage = "";
this.SetBlocksOfencyptedMessage(encyptedMessage);
bool[] msgtIP;
bool[] LHalf = new bool[32];
bool[] RHalf = new bool[32];
bool[] REtable;
bool[] inpXORmsg;
bool[] sboxOutput = new bool[32];
bool[] sboxCellInput = new bool[6];
bool[] sboxP;
bool[] RXorL = null;
bool[] encyMsg = new bool[64];
bool[] encyMsgP = new bool[64];
byte[] encyMsgByte;
for (int i = 0; i < this.blocks.GetLength(0); i++)
{
msgtIP = this.Permutation(this.IP, this.blocks[i]);
Array.Copy(msgtIP, 0, LHalf, 0, LHalf.Length);
Array.Copy(msgtIP, LHalf.Length, RHalf, 0, RHalf.Length);
for (int j = 0; j < 16; j++)
{
REtable = this.Permutation(this.ETable, RHalf);
inpXORmsg = BitManipulator.XOR(REtable, this.allKeys[16 - j - 1]);
for (int k = 0, l = 0; k < inpXORmsg.Length; k += 6, l++)
{
Array.Copy(inpXORmsg, k, sboxCellInput, 0, sboxCellInput.Length);
bool[] temp = this.Sbox(sboxCellInput, this.sboxes[l]);
Array.Copy(temp, 0, sboxOutput, 4 * l, 4);
}
sboxP = this.Permutation(this.P, sboxOutput);
RXorL = BitManipulator.XOR(sboxP, LHalf);
LHalf = RHalf;
RHalf = RXorL;
}
RHalf = LHalf;
LHalf = RXorL;
Array.Copy(LHalf, 0, encyMsg, 0, LHalf.Length);
Array.Copy(RHalf, 0, encyMsg, LHalf.Length, RHalf.Length);
encyMsgP = this.Permutation(this.IP1, encyMsg);
encyMsgByte = BitManipulator.BoolToByte(encyMsgP);
Array.Reverse(encyMsgByte);
OriginalMessage += Encoding.ASCII.GetString(encyMsgByte);
}
return(OriginalMessage);
}
private bool[] Sbox(bool[] sboxCellInput, int[,] sbox)
{
bool[] rowInBool = { sboxCellInput[0], sboxCellInput[5] };
bool[] colInBool = { sboxCellInput[1], sboxCellInput[2], sboxCellInput[3], sboxCellInput[4] };
byte[] rowInByte = BitManipulator.BoolToByte(rowInBool);
byte[] colInByte = BitManipulator.BoolToByte(colInBool);
int row = (int)(Convert.ToDecimal(rowInByte[0]));
int col = (int)(Convert.ToDecimal(colInByte[0]));
int temp = sbox[row, col];
byte[] b = BitManipulator.IntTobytes(temp);
bool[] sboxCellOutput = new bool[4];
Array.Copy(BitManipulator.GetMasks(b).ToArray(), 28, sboxCellOutput, 0, 4);
return(sboxCellOutput);
}
private char[] Encryption(string Msg)
{
this.SetBlocksOfPlainText(Msg);
bool[] msgtIP;
bool[] LHalf = new bool[32];
bool[] RHalf = new bool[32];
bool[] REtable;
bool[] inpXORmsg;
bool[] sboxOutput = new bool[32];
bool[] sboxCellInput = new bool[6];
bool[] sboxP;
bool[] RXorL = null;
bool[] encyMsg = new bool[64];
bool[] encyMsgP = new bool[64];
byte[] encyMsgByte;
char[] encyMsgChar = new char[this.blocks.GetLength(0) * 8];
for (int i = 0; i < this.blocks.GetLength(0); i++)
{
msgtIP = this.Permutation(this.IP, this.blocks[i]);
Array.Copy(msgtIP, 0, LHalf, 0, LHalf.Length);
Array.Copy(msgtIP, LHalf.Length, RHalf, 0, RHalf.Length);
for (int j = 0; j < 16; j++)
{
REtable = this.Permutation(this.ETable, RHalf);
inpXORmsg = BitManipulator.XOR(REtable, this.allKeys[j]);
for (int k = 0, l = 0; k < inpXORmsg.Length; k += 6, l++)
{
Array.Copy(inpXORmsg, k, sboxCellInput, 0, sboxCellInput.Length);
bool[] temp = this.Sbox(sboxCellInput, this.sboxes[l]);
Array.Copy(temp, 0, sboxOutput, 4 * l, 4);
}
sboxP = this.Permutation(this.P, sboxOutput);
RXorL = BitManipulator.XOR(sboxP, LHalf);
LHalf = RHalf;
RHalf = RXorL;
}
RHalf = LHalf;
LHalf = RXorL;
Array.Copy(LHalf, 0, encyMsg, 0, LHalf.Length);
Array.Copy(RHalf, 0, encyMsg, LHalf.Length, RHalf.Length);
encyMsgP = this.Permutation(this.IP1, encyMsg);
encyMsgByte = BitManipulator.BoolToByte(encyMsgP);
Array.Copy(this.ToCharArray(encyMsgByte), 0, encyMsgChar, i * 8, 8);
}
return(encyMsgChar);
}