public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            // Perform any additional setup after loading the view, typically from a nib.

            MatrixFunctions mat = new MatrixFunctions();

            //bool validMessage = false;
            int[] matrixValues = new int[4];
            //int matrixChoice_clicks = 0;
            //int messageUser_clicks = 0;
            //int encrpytTry_clicks = 0;

            /*matrixChoice.Click += (sender, e) =>
             * {
             *  if (matrixChoice_clicks == 0)
             *  {
             *      matrixChoice.Text = "";
             *  }
             *  matrixChoice_clicks++;
             * };
             *
             * messageUser.Click += (sender, e) =>
             * {
             *  if (messageUser_clicks == 0)
             *  {
             *      messageUser.Text = "";
             *  }
             *  messageUser_clicks++;
             * };
             *
             * encryptTry.Click += (sender, e) =>
             * {
             *  if (encrpytTry_clicks == 0)
             *  {
             *      encryptTry.Text = "";
             *  }
             *  encrpytTry_clicks++;
             * }; */


            chooseMatrix.TouchUpInside += (sender, e) =>
            {
                string userInput = matrixChoice.Text;
                if (userInput == "N")
                {
                    matrixValues = new int[] { 27, 7, 8, 2, 3, 5, 0, 0, 0 };
                    string matrixStr = "";
                    for (int i = 0; i < 3; i++)
                    {
                        for (int j = 0; j < 3; j++)
                        {
                            matrixStr = matrixStr + matrixValues[3 * i + j] + "\t\t";
                        }
                        matrixStr += "\n";
                    }
                    matrixView.Text = "Your matrix for encryption is: \n" + matrixStr;
                }
                else
                {
                    userInput = Regex.Replace(userInput, @"\s+", "");
                    string[] str_arr      = userInput.Split(',').Select(x => x.Trim()).ToArray();
                    bool     correctinput = true;
                    for (int i = 0; i < str_arr.Length; i++)
                    {
                        if (correctinput)
                        {
                            try
                            {
                                int m = Int32.Parse(str_arr[i]);
                            }
                            catch (FormatException)
                            {
                                correctinput = false;
                            }
                        }
                    }
                    if (correctinput)
                    {
                        int[] testMatrix = userInput.Split(',').Select(int.Parse).ToArray();
                        int   det        = mat.Determinent(testMatrix);
                        if (det != 0)
                        {
                            matrixView.Text = "Not a valid non-invertable matrix.";
                        }
                        else
                        {
                            matrixValues = testMatrix;
                            string matrixStr = "{";
                            for (int i = 0; i < 3; i++)
                            {
                                for (int j = 0; j < 3; j++)
                                {
                                    matrixStr = matrixStr + matrixValues[3 * i + j] + " ";
                                }
                                if (i < 2)
                                {
                                    matrixStr += "; ";
                                }
                            }
                            matrixStr       = matrixStr + "}";
                            matrixView.Text = "Your matrix for encryption is: " + matrixStr;
                        }
                    }
                    else
                    {
                        matrixView.Text = "Invalid input.";
                    }
                }
            };

            encryptMessage.TouchUpInside += (sender, e) =>
            {
                string userMessage = messageUser.Text;
                if (Regex.IsMatch(userMessage, @"^[ a-zA-Z]+$"))
                {
                    messageView.Text = "Your message is: " + userMessage;
                }
                else
                {
                    messageView.Text = "Invalid input.";
                }
            };

            testUser.TouchUpInside += (sender, e) =>
            {
                if (Regex.IsMatch(messageUser.Text, @"^[ a-zA-Z]+$"))
                {
                    if (matrixValues.Length == 9)
                    {
                        string userTry     = encryptTry.Text;
                        string userMessage = messageUser.Text;
                        int[]  userGuess   = userTry.Split(',').Select(int.Parse).ToArray();

                        // Make the message a multiple of 3 so we can encrypt
                        int MesLen = userMessage.Length;
                        int rem    = MesLen % 3;
                        if (rem != 0)
                        {
                            for (int i = 0; i < (3 - rem); i++)
                            {
                                userMessage += " ";
                                MesLen      += 1;
                            }
                        }

                        int encryptLength = MesLen / 3;

                        int[,] mesVecForm = new int[encryptLength, 3];
                        // Now we want to split the string into the groups of 3.
                        for (int i = 0; i < encryptLength; i++)
                        {
                            string mesVecStr = userMessage.Substring(0, 3);
                            int    j         = 0;
                            foreach (char k in mesVecStr)
                            {
                                mesVecForm[i, j] = ((int)k % 32) - 1;
                                if (mesVecForm[i, j] == -1)
                                {
                                    mesVecForm[i, j] = 26;
                                }
                                j++;
                            }
                            userMessage = userMessage.Substring(3);
                        }

                        int[][] encryptedMes = new int[encryptLength][];
                        int[]   tempVec      = new int[3];
                        // Now we want to convert the whole message.
                        for (int i = 0; i < MesLen / 3; i++)
                        {
                            tempVec[0]      = mesVecForm[i, 0];
                            tempVec[1]      = mesVecForm[i, 1];
                            tempVec[2]      = mesVecForm[i, 2];
                            encryptedMes[i] = mat.MatrixMult(matrixValues, tempVec);
                        }

                        string encryptedMessage = "";
                        for (int i = 0; i < encryptLength; i++)
                        {
                            encryptedMessage += encryptedMes[i][0].ToString() + " ";
                            encryptedMessage += encryptedMes[i][1].ToString() + " ";
                            encryptedMessage += encryptedMes[i][2].ToString() + " ";
                        }

                        bool rightguess = true;
                        for (int i = 0; i < 3; i++)
                        {
                            if (encryptedMes[0][i] != userGuess[i])
                            {
                                rightguess = false;
                            }
                        }

                        if (rightguess)
                        {
                            encryptionView.Text = encryptedMessage;
                        }
                        else
                        {
                            encryptionView.Text = "Incorrect encryption.";
                        }
                    }
                    else
                    {
                        encryptionView.Text = "Do not have a valid matrix for encrpytion.";
                    }
                }
                else
                {
                    encryptionView.Text = "Invalid message.";
                }
            };
        }
Example #2
0
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            // Perform any additional setup after loading the view, typically from a nib.

            MatrixFunctions mat = new MatrixFunctions();

            int[]   matrixValues  = new int[4];
            int[]   inverseValues = new int[4];
            int[][] encryptedM    = new int[4][];
            //int hillMatrix_clicks = 0;
            //int hillMessageUser_clicks = 0;
            //int encryptHillTry_clicks = 0;
            //int hillInverse_clicks = 0;
            //int userDecrypt_clicks = 0;
            bool validMatrix  = false;
            bool validInverse = false;

            hillMatrix.ShouldReturn = (TextField) =>
            {
                TextField.ResignFirstResponder();
                return(true);
            };

            hillMessageUser.ShouldReturn = (TextField) =>
            {
                TextField.ResignFirstResponder();
                return(true);
            };

            encryptHillTry.ShouldReturn = (TextField) =>
            {
                TextField.ResignFirstResponder();
                return(true);
            };

            hillInverse.ShouldReturn = (TextField) =>
            {
                TextField.ResignFirstResponder();
                return(true);
            };

            userDecrypt.ShouldReturn = (TextField) =>
            {
                TextField.ResignFirstResponder();
                return(true);
            };


            matrixButton.TouchUpInside += (object sender, EventArgs e) =>
            {
                string userInput = hillMatrix.Text;
                userInput = Regex.Replace(userInput, @"\s+", "");
                string[] str_arr      = userInput.Split(',').Select(x => x.Trim()).ToArray();
                bool     correctinput = true;
                for (int i = 0; i < str_arr.Length; i++)
                {
                    if (correctinput)
                    {
                        try
                        {
                            int m = Int32.Parse(str_arr[i]);
                        }
                        catch (FormatException)
                        {
                            correctinput = false;
                        }
                    }
                }
                if (correctinput)
                {
                    int[] testMatrix = userInput.Split(',').Select(int.Parse).ToArray();
                    int   det        = mat.Determinent(testMatrix);
                    if (det != 1 && det != -1)
                    {
                        validMatrix     = false;
                        showMatrix.Text = "Not a valid non-invertable matrix.";
                    }
                    else
                    {
                        matrixValues = testMatrix;
                        string matrixStr = "{";
                        for (int i = 0; i < 3; i++)
                        {
                            for (int j = 0; j < 3; j++)
                            {
                                matrixStr = matrixStr + matrixValues[3 * i + j] + " ";
                            }
                            if (i < 2)
                            {
                                matrixStr += "; ";
                            }
                        }
                        matrixStr       = matrixStr + "}";
                        validMatrix     = true;
                        showMatrix.Text = "Your matrix for encryption is: " + matrixStr;
                    }
                }
                else
                {
                    validMatrix     = false;
                    showMatrix.Text = "Not valid input.";
                }
            };

            encryptHillMessage.TouchUpInside += (object sender, EventArgs e) =>
            {
                string userMessage = hillMessageUser.Text;
                if (Regex.IsMatch(userMessage, @"^[ a-zA-Z]+$"))
                {
                    showMessage.Text = "Your message is: " + userMessage;
                }
                else
                {
                    showMessage.Text = "Invalid Message.";
                }
            };

            testHill.TouchUpInside += (object sender, EventArgs e) =>
            {
                if (validMatrix)
                {
                    string userTry     = encryptHillTry.Text;
                    string userMessage = hillMessageUser.Text;
                    userTry = Regex.Replace(userTry, @"\s+", "");
                    bool correctinput = false;
                    if (userMessage != null)
                    {
                        string[] str_arr = userTry.Split(',').Select(x => x.Trim()).ToArray();
                        correctinput = true;
                        for (int i = 0; i < str_arr.Length; i++)
                        {
                            if (correctinput)
                            {
                                try
                                {
                                    int m = Int32.Parse(str_arr[i]);
                                }
                                catch (FormatException)
                                {
                                    correctinput = false;
                                }
                            }
                        }
                    }

                    if (correctinput)
                    {
                        int[] userGuess = userTry.Split(',').Select(int.Parse).ToArray();
                        // Make the message a multiple of 3 so we can encrypt
                        int MesLen = userMessage.Length;
                        int rem    = MesLen % 3;
                        if (rem != 0)
                        {
                            for (int i = 0; i < (3 - rem); i++)
                            {
                                userMessage += " ";
                                MesLen      += 1;
                            }
                        }

                        int encryptLength = MesLen / 3;

                        int[,] mesVecForm = new int[encryptLength, 3];
                        // Now we want to split the string into the groups of 3.
                        for (int i = 0; i < encryptLength; i++)
                        {
                            string mesVecStr = userMessage.Substring(0, 3);
                            int    j         = 0;
                            foreach (char k in mesVecStr)
                            {
                                mesVecForm[i, j] = ((int)k % 32) - 1;
                                if (mesVecForm[i, j] == -1)
                                {
                                    mesVecForm[i, j] = 26;
                                }
                                j++;
                            }
                            userMessage = userMessage.Substring(3);
                        }

                        int[][] encryptedMes = new int[encryptLength][];
                        int[]   tempVec      = new int[3];
                        // Now we want to convert the whole message.
                        for (int i = 0; i < MesLen / 3; i++)
                        {
                            tempVec[0]      = mesVecForm[i, 0];
                            tempVec[1]      = mesVecForm[i, 1];
                            tempVec[2]      = mesVecForm[i, 2];
                            encryptedMes[i] = mat.MatrixMult(matrixValues, tempVec);
                        }

                        string encryptedMessage = "";
                        for (int i = 0; i < encryptLength; i++)
                        {
                            encryptedMessage += encryptedMes[i][0].ToString() + " ";
                            encryptedMessage += encryptedMes[i][1].ToString() + " ";
                            encryptedMessage += encryptedMes[i][2].ToString() + " ";
                        }

                        bool rightguess = true;
                        for (int i = 0; i < 3; i++)
                        {
                            if (encryptedMes[0][i] != userGuess[i])
                            {
                                rightguess = false;
                            }
                        }

                        if (rightguess)
                        {
                            viewHillTry.Text = encryptedMessage;
                            encryptedM       = encryptedMes;
                        }
                        else
                        {
                            viewHillTry.Text = "Incorrect encryption.";
                        }
                    }
                    else
                    {
                        viewHillTry.Text = "Not a valid guess.";
                    }
                }
                else
                {
                    viewHillTry.Text = "Do not have a valid matrix for encrpytion.";
                }
            };

            submitInverse.TouchUpInside += (object sender, EventArgs e) =>
            {
                string userInput = hillInverse.Text;
                userInput = Regex.Replace(userInput, @"\s+", "");
                string[] str_arr      = userInput.Split(',').Select(x => x.Trim()).ToArray();
                bool     correctinput = true;
                for (int i = 0; i < str_arr.Length; i++)
                {
                    if (correctinput)
                    {
                        try
                        {
                            int m = Int32.Parse(str_arr[i]);
                        }
                        catch (FormatException)
                        {
                            correctinput = false;
                        }
                    }
                }
                if (correctinput)
                {
                    int[] testMatrix     = userInput.Split(',').Select(int.Parse).ToArray();
                    int[] inverseVal     = mat.MatrixMultTwo(matrixValues, testMatrix);
                    int[] identityMatrix = new int[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
                    bool  isEqual        = Enumerable.SequenceEqual(inverseVal, identityMatrix);
                    if (!isEqual)
                    {
                        validInverse     = false;
                        showInverse.Text = "Not a valid inverse matrix.";
                    }
                    else
                    {
                        inverseValues = testMatrix;
                        string matrixStr = "{";
                        for (int i = 0; i < 3; i++)
                        {
                            for (int j = 0; j < 3; j++)
                            {
                                matrixStr = matrixStr + inverseValues[3 * i + j] + " ";
                            }
                            if (i < 2)
                            {
                                matrixStr += "; ";
                            }
                        }
                        matrixStr       += "}";
                        validInverse     = true;
                        showInverse.Text = "Your matrix for decryption is: " + matrixStr;
                    }
                }
                else
                {
                    validInverse     = false;
                    showInverse.Text = "Not valid input.";
                }
            };

            startDecrypt.TouchUpInside += (object sender, EventArgs e) =>
            {
                if (validInverse & validMatrix)
                {
                    string userTry   = userDecrypt.Text;
                    int[]  userGuess = userTry.Split(',').Select(int.Parse).ToArray();

                    int[][] decryptedMes  = encryptedM;
                    int     decryptLength = decryptedMes.GetLength(0);


                    int[] tempVec = new int[3];
                    // Now we want to convert the whole message.
                    for (int i = 0; i < decryptLength; i++)
                    {
                        tempVec[0]      = encryptedM[i][0];
                        tempVec[1]      = encryptedM[i][1];
                        tempVec[2]      = encryptedM[i][2];
                        decryptedMes[i] = mat.MatrixMult(inverseValues, tempVec);
                    }

                    string decryptedMessage = "";
                    for (int i = 0; i < decryptLength; i++)
                    {
                        decryptedMessage += decryptedMes[i][0].ToString() + " ";
                        decryptedMessage += decryptedMes[i][1].ToString() + " ";
                        decryptedMessage += decryptedMes[i][2].ToString() + " ";

                        //decryptedMessage += mat.Number2String(decryptedMes[i][0]) + " ";
                        //decryptedMessage += mat.Number2String(decryptedMes[i][1]) + " ";
                        //decryptedMessage += mat.Number2String(decryptedMes[i][2]) + " ";
                    }

                    bool rightguess = true;
                    for (int i = 0; i < 3; i++)
                    {
                        if (decryptedMes[0][i] != userGuess[i])
                        {
                            rightguess = false;
                        }
                    }

                    if (rightguess)
                    {
                        showDecrypt.Text = decryptedMessage;
                    }
                    else
                    {
                        showDecrypt.Text = "Incorrect decryption.";
                    }
                }
                else
                {
                    showDecrypt.Text = "Do not have a valid matrix for decryption.";
                }
            };
        }