Thread: Reading encrypted text file in program!

Hello peeps!


I need some help to decrypt my text file and make it able to read in my program..

What I have programmed so far is to read the encrypted file, create a new file, decrypt it and read the newly created file..

I need to decrypt the encrypted file without having to create a new file that reads the decrypted text..

Well, Let me show you my code:

P.S Most of the include is not needed and I already know that

Visual studio 2010 Windows Form Application CLR

Code:

#pragma once


#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <conio.h>
#include <stdio.h>
#include <iomanip>


namespace EncryptandDecryptfiletest {


    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;
    using namespace System::IO;
    using namespace std;


    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {


                 /*Decryption --- When program loads*/


                 char ch,mod;
                 char key = 97;
                 char name[100] = "Encrypted.txt";
                 char target[100] = "TTO.txt";
                 ifstream fin("Encrypted.txt", ios::binary); // Reading file
                 if(!fin) //open the encrypted file in a binary mode
                 {
                     MessageBox::Show("Encrypted.txt did not open"); //If file does not exist
                 } //or any kind of error
                 
                 ofstream fout;
                 fout.open(target,ios::binary); //Opens outputfile
                 if(!fout)
                 { //Show error if any error occurs in opening new file
                     MessageBox::Show("TTO.txt did not open");
                 }
                 while(fin.get(ch))
                 { // opens the Encrypted file
                     if(ch==EOF)break;
                     mod = ch + key;
                     if (mod > 255 ) mod -= 255;
                     fout << mod; //Writes decrypted text to TTO.txt
                 }
                 fin.close(); //Close the encrypted file
                 fout.close(); // Close the decrypted file
             }
    private: System::Void comboBox1_SelectedIndexChanged(System::Object^  sender, System::EventArgs^  e) {


                 label1->Text = comboBox1->Text;
                 pictureBox1->Load("Images\\" + comboBox1->SelectedItem->ToString() + ".png");


                 //String^ openFileTest = "Encrypted.txt"; // Opens the encrypted .txt file
                 String^ openFileTest = "TTO.txt"; //Opens the newly created file that is decrypted


                 try  //Reading the .txt file
                 {
                     StreamReader^ DataIn = File::OpenText(openFileTest);
                     String^ DataStr;
                     int count = 0;
                     array<String^>^ result;
                     array<Char>^ separ = gcnew array<Char>{'"'}; //After each Quote gets a new value of result[x]


                     while((DataStr = DataIn->ReadLine()) != nullptr)
                     {
                         count++;
                         result = DataStr->Split(separ);
                         if(comboBox1->Text == result[0]) // result[0] = Name
                         {
                             textBox1->Text = result[1]; //reads first word in txt file
                             textBox2->Text = result[2]; //second word in txt file
                             textBox3->Text = result[3]; //third word in txt file
                         }
                     } // ends while()
                 } // ends try
                 catch (Exception^ e)
                 {
                     if(dynamic_cast<FileNotFoundException^>(e))
                         MessageBox::Show("File " + openFileTest + " not found");
                 }
             } // Ends comboBox1_SelectedIndexChanged void
};
}

You have my decryption code and the code I want to use..

I have uploaded the code for you to use on your computer because it is fairly hard for me to explain..

I want to be able to read the encrypted file in my program, without having to writing a new file to decrypt it..

I hope anyone is able to help me

Decrypted & Encrypted .txt file Included (And images)

--> Program .rar pack link <--

Build it with Visual Studio 2010

You do know that you can solve this problem using standard C++, right?

By the way, this is why "C++" sucks, especially as a first language. In a few years (maybe 1) we're going to have a great number of people who cannot code their way out of a bag made of oxygen.

Originally Posted by SirPrattlepod

You do know that you can solve this problem using standard C++, right?

I do know that, but I can't figure it out.. that is why I need help with it.

and yes everything is already coded with c++...

What I can't figure out is how to read the encrypted file, and use the encrypted file to write out the stuff i want to write out in the program..

All I have figured out so far is how to decrypt the encrypted file, create a new file with the decrypted text and open that file to let the program read..

Ofcourse, you can already see that in the code