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Encryption.cpp
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Encryption.cpp
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#include <vector>
#include <iostream>
#include <sstream>
#include "Encryption.h"
using namespace std;
/*Gets the user input that is meant to be encrypted*/
void Encryption::getInput()
{
cout << "Enter Input: ";
cin.ignore();
getline(cin, input);
}
/*This functions put everything together and runs all the encryption methods*/
void Encryption::textEncryption()
{
bool allZero = true;
if (encrypted.size() != 0)
{
encrypted.clear();
}
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
if (matrixToMultiply[i][j] != 0)
{
allZero = false;
}
}
}
if (allZero)
{
cout << "\nPlease Enter a valid key\n";
return;
}
getInput();
int sizeOfString = input.size();
while (sizeOfString % 15 != 0) //The string MUST be 15 chars for a 3x5 matrix, so this adds spaces if it is not
{
input += " ";
sizeOfString = input.size();
}
int timesToRun = sizeOfString / 15; // Gets the number of matrices that will be made
for (int i = 0; i < timesToRun; i++)
{
if (i == 0)
{
tempHolder = input.substr(0, 15); // this is the first time it runs, it will get the first 15 chars
}
else
{
tempHolder = input.substr(i*15, 15); // after the first time it gets the following 15 chars each time it runs
}
/*Encryption Functions*/
stringToMatrix();
vectorMultiplication();
matrixTransformation();
}
/*Displays output*/
displayOutput();
}
/*This function takes in a string and turns it into the correct 3x5 matrix
It will only be sent 15 char strings. A note, it does not input data
horizontally, it is inserted vertically into the vector. This is intended*/
void Encryption::stringToMatrix()
{
vector<int> testerVect;
int countVec = 0;
for (int i = 0; i < 15; i++)
{
int charToAdd = static_cast<int>(tempHolder[i]);
testerVect.push_back(charToAdd - 32);
}
for (int j = 0; j < 5; j++)
{
for (int i = 0; i < 3; i++)
{
originMatrix[i][j] = testerVect[countVec];
countVec++;
}
}
}
/*Displays the matrix in an easy to see way*/
void Encryption::seeMatrix()
{
cout << endl << "Output Matrix: " << endl;
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < 3; ++j)
{
cout << " " << matrixToMultiply[i][j];
if (j == 3 - 1)
{
cout << endl;
}
}
}
}
/*This takes the matrix that has been encrypted/decrypted and sends the output into a vector
That vector would be the encrypted data, or the decrypted data if sent in through the other
class*/
void Encryption::matrixTransformation()
{
for (int j = 0; j < 5; j++)
{
for (int i = 0; i < 3; i++)
{
mutipliedMatrix[i][j] = (mutipliedMatrix[i][j] % 95) + 32;
encrypted.push_back(mutipliedMatrix[i][j]);
}
}
}
/*This multiples the vectors together, to transform the text into something based off of the
3x3 matrix which would be your key. This is the main encryption method.*/
void Encryption::vectorMultiplication()
{
for (int i = 0; i < 3; ++i)
for (int j = 0; j < 5; ++j)
{
mutipliedMatrix[i][j] = 0;
}
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 5; j++)
{
for (int k = 0; k < 3; k++)
{
mutipliedMatrix[i][j] += matrixToMultiply[i][k] * (originMatrix[k][j]);
}
}
}
}
/*Loops through the vector that holds the data stored by a previous function*/
void Encryption::displayOutput()
{
int inputLength = encrypted.size();
cout << endl << "Your encrypted string:\n";
for (int i = 0; i < inputLength; i++)
{
cout << static_cast<char>(encrypted[i]);
}
cout << endl;
}
void Encryption::setMatrix(int param, int i, int j)
{
matrixToMultiply[j][i] = param;
}