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 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);
}