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Buffer Overflow Tutorial

This tutorial is based on the Computerphile video, made by Dr. Mike Pound

https://www.youtube.com/watch?v=1S0aBV-Waeo

The tutorial will show you how to trigger and exploit a buffer overflow attack against a custom C program, using Kali Linux 32-bit PAE 2016.1.

Torrent Link: https://images.offensive-security.com/virtual-images/Kali-Linux-2016.1-vbox-i686.torrent

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#!/use/bin/env python3

import tkinter
from tkinter import *
from tkinter.filedialog import asksaveasfilename
from PIL import Image, ImageTk, ImageGrab

window = tkinter.Tk()
window.geometry("520x800")
window.title("STARLABS BIOSCIENCE SDN BHD")

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package com.johnmelodyme.bloodsugarcontrolv1;

/*
 *このページは、読み込みに伴うスプラッシュです。
 * これは John Melody Melissa によってコーディングされています。
 * このライセンスは、商標、サービスマーク、
 * または貢献者のロゴ（準拠するために必要な場合を除く）
 * セクション3.4の通知要件）。
 **/

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Guys I have Some issue:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: my.kylogger.johnmelodyme.iot.embedded.serialcommunicationuart, PID: 11607
    java.lang.IllegalStateException: Could not execute method for android:onClick


My Source :
public void OpenSerial(View view){
        String baudtext = Baud.getSelectedItem().toString();

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// I use Java , in kotlin is almost the same I guess
...
//Global
private Firebase firebase;
//something
...
// in onCreate(); 
firebase = Firebase.getInstance();
...
FirebaseUser firebaseUser = firebase.getCurrentUser();

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//encode:
 Future<void> _encryptionBinary() async {
    int x = 0;
    int y = 100;
    print("Please Enter {content} you want to encrypt:  ");
    String _requestUserFileInput = IO.stdin.readLineSync();
    List _binary = await new IO.File(_requestUserFileInput).readAsBytesSync();
    String _encodedFile = base64.encode(_binary);
    print("Encoded Binary:  $_encodedFile".substring(x, y));
  }

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<?php
// My intention is to decodeencrypted image hashes
// and export back to File(image.extension)
echo "Decrypt {string} or {file}? [input: \"str\" || \"bin\", type \"exit()\" for quit the programme]";
$__userInputOption = rtrim(fgets(STDIN));
if ($__userInputOption == "str"){
      echo "Please enter {string} you want to decode: \n";
      $_input = rtrim(fgets(STDIN));
      $_encodedString = base64_decode($_input);
      echo "Encoded String: ".$_input."\n";

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#encoder:
import base64

_userOriginalBinaryfile = input("Please Enter the Location of the file design to encrypt:  ")
with open(_userOriginalBinaryfile, "rb") as _inputFile:
      _input_file_data = _inputFile.read()
      _encodeData = base64.b64encode(_input_file_data)
      _encodeMessage = _encodeData.decode("utf-8")

      print(_encodeMessage)

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package src.decryption;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.spec.KeySpec;
import java.util.Scanner;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;

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package src.encryption;
/*
* @string encryption sample
*/
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Base64;
import java.util.Scanner;