protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.HillCipher_Layout);
EditText hillMatrix = FindViewById <EditText>(Resource.Id.hillMatrix);
EditText hillMessageUser = FindViewById <EditText>(Resource.Id.hillMessageUser);
EditText encryptHillTry = FindViewById <EditText>(Resource.Id.encryptHillTry);
EditText hillInverse = FindViewById <EditText>(Resource.Id.hillInverse);
EditText userDecrypt = FindViewById <EditText>(Resource.Id.userDecrypt);
TextView hillMatrixMessage = FindViewById <TextView>(Resource.Id.hillMatrixMessage);
TextView showMatrix = FindViewById <TextView>(Resource.Id.showMatrix);
TextView hillMessage = FindViewById <TextView>(Resource.Id.hillMessage);
TextView showMessage = FindViewById <TextView>(Resource.Id.showMessage);
TextView encryptHill = FindViewById <TextView>(Resource.Id.encryptHill);
TextView viewHillTry = FindViewById <TextView>(Resource.Id.viewHillTry);
TextView askInverse = FindViewById <TextView>(Resource.Id.askInverse);
TextView showInverse = FindViewById <TextView>(Resource.Id.showInverse);
TextView askDecrypt = FindViewById <TextView>(Resource.Id.askDecrypt);
TextView showDecrypt = FindViewById <TextView>(Resource.Id.showDecrypt);
Button matrixButton = FindViewById <Button>(Resource.Id.matrixButton);
Button encryptHillMessage = FindViewById <Button>(Resource.Id.encryptHillMessage);
Button testHill = FindViewById <Button>(Resource.Id.testHill);
Button submitInverse = FindViewById <Button>(Resource.Id.submitInverse);
Button startDecrypt = FindViewById <Button>(Resource.Id.startDecrypt);
MatrixEncryption.MatrixFunctions mat = new MatrixEncryption.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.Click += (sender, e) =>
{
if (hillMatrix_clicks == 0)
{
hillMatrix.Text = "";
}
hillMatrix_clicks++;
};
hillMessageUser.Click += (sender, e) =>
{
if (hillMessageUser_clicks == 0)
{
hillMessageUser.Text = "";
}
hillMessageUser_clicks++;
};
encryptHillTry.Click += (sender, e) =>
{
if (encryptHillTry_clicks == 0)
{
encryptHillTry.Text = "";
}
encryptHillTry_clicks++;
};
hillInverse.Click += (sender, e) =>
{
if (hillInverse_clicks == 0)
{
hillInverse.Text = "";
}
hillInverse_clicks++;
};
userDecrypt.Click += (sender, e) =>
{
if (userDecrypt_clicks == 0)
{
userDecrypt.Text = "";
}
userDecrypt_clicks++;
};
matrixButton.Click += (sender, 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 == 0)
{
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] + "\t\t";
}
matrixStr += "\n";
}
validMatrix = true;
showMatrix.Text = "Your matrix for encryption is: \n" + matrixStr;
}
}
else
{
validMatrix = false;
showMatrix.Text = "Not valid input.";
}
};
encryptHillMessage.Click += (sender, e) =>
{
string userMessage = hillMessageUser.Text;
if (Regex.IsMatch(userMessage, @"^[a-zA-Z]+$"))
{
showMessage.Text = "Your message is: " + userMessage;
}
else
{
showMessage.Text = "Invalid Message.";
}
};
testHill.Click += (sender, e) =>
{
if (validMatrix)
{
string userTry = encryptHillTry.Text;
string userMessage = hillMessageUser.Text;
userTry = Regex.Replace(userTry, @"\s+", "");
string[] str_arr = userTry.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[] 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;
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.Click += (sender, 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] + "\t\t";
}
matrixStr += "\n";
}
validInverse = true;
showInverse.Text = "Your matrix for decryption is: \n" + matrixStr;
}
}
else
{
validInverse = false;
showInverse.Text = "Not valid input.";
}
};
startDecrypt.Click += (sender, 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() + " ";
}
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.";
}
};
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Matrix_Layout);
// Get our button from the layout resource,
// and attach an event to it
EditText matrixChoice = FindViewById <EditText>(Resource.Id.matrixChoice);
Button chooseMatrix = FindViewById <Button>(Resource.Id.chooseMatrix);
EditText messageUser = FindViewById <EditText>(Resource.Id.messageUser);
Button encryptMessage = FindViewById <Button>(Resource.Id.encryptMessage);
EditText encryptTry = FindViewById <EditText>(Resource.Id.encryptTry);
Button testUser = FindViewById <Button>(Resource.Id.testUser);
TextView matrixView = FindViewById <TextView>(Resource.Id.matrixView);
TextView encryptionView = FindViewById <TextView>(Resource.Id.encryptionView);
TextView messageView = FindViewById <TextView>(Resource.Id.messageView);
TextView matrixMessage = FindViewById <TextView>(Resource.Id.matrixMessage);
TextView messageMessage = FindViewById <TextView>(Resource.Id.messageMessage);
TextView encryptStep = FindViewById <TextView>(Resource.Id.encryptStep);
MatrixEncryption.MatrixFunctions mat = new MatrixEncryption.MatrixFunctions();
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.Click += (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
{
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] + "\t\t";
}
matrixStr += "\n";
}
matrixView.Text = "Your matrix for encryption is: \n" + matrixStr;
}
}
};
encryptMessage.Click += (sender, e) =>
{
string userMessage = messageUser.Text;
messageView.Text = "Your message is: " + userMessage;
};
testUser.Click += (sender, e) =>
{
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;
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.";
}
};
}