benwaffle

public class SleepSort {
	public static void main(String[] args) {
		
		for (String arg : args) {
			int time = Integer.parseInt(arg);
			
			new Thread(() -> {
				try {
					Thread.sleep(time*10);
				} catch (Exception e) {e.printStackTrace();}

benwaffle

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class MathReflection {
	public static void main(String[] args) throws SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException {
		Constructor<?> ctor = Math.class.getDeclaredConstructors()[0];
		ctor.setAccessible(true);
		Math mathinstance = (Math) ctor.newInstance();
		
		System.out.println(mathinstance);

benwaffle

public class Crypto {
	private static String sStringToHMACMD5(String s, String keyString) {
		String sEncodedString = null;
		try {
			javax.crypto.spec.SecretKeySpec key = new javax.crypto.spec.SecretKeySpec((keyString).getBytes("UTF-8"), "HmacMD5");
			javax.crypto.Mac mac = javax.crypto.Mac.getInstance("HmacMD5");
			mac.init(key);

			byte[] bytes = mac.doFinal(s.getBytes("ASCII"));

benwaffle

For those of you HS hackers familiar with IRC, go and join the conversation at #hshackers on freenode

##What is this IRC you speak of? Internet Relay Chat is an slightly older form of communication, but it is still widely used today. Many developer communities use these channels to quickly get help and/or discuss projects.

##Why join the convo? Because the HSH community is a group of brilliant individuals that needs answers and feedback - lots of it, and fast!

##How to get in on the convo The first thing that you will need is an IRC client, it'll connect you to all the networks and whatnot. A few popular clients:

benwaffle

#include <ctype.h>

char flip(char in) {
    if (isalpha(in))
        if (isupper(in))
            return tolower(in);
        else
            return toupper(in);
    return in;
}

benwaffle

import java.lang.reflect.Field;
import sun.misc.Unsafe;

public class CrashJVM {
	public static void main(String[] args) throws Exception {
		Field privUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
		privUnsafe.setAccessible(true);
		Unsafe theUnsafe = (Unsafe) privUnsafe.get(null);
		
		theUnsafe.freeMemory(1);

benwaffle

#include <stdio.h>

void func(){
	int *ret;	// a local var in stack frame
	ret = &ret+2;	// +1 for the int* and +1 for saved ebp
	*ret += 12;	// ret addr += 12 (get from disassembly)
}

int main(int argc, char *argv[]) {
	func();

benwaffle

#include <stdlib.h>

int compare(const void *a, const void *b) {
	return *(int*)a - *(int*)b;
}

void reassurance_sort(int *nums, int len){
	qsort(nums, len, sizeof(int), compare);
	qsort(nums, len, sizeof(int), compare);
}

benwaffle

CC=g++
CFLAGS=
LDFLAGS=-ltorrent-rasterbar -lpthread -lboost_system

all:
	$(CC) $(CFLAGS) $(LDFLAGS) -o test test.cpp

benwaffle

cpp:
	g++ -shared -fPIC -o libcppcode.so cppcode.cpp

c:
	gcc -L. -lcppcode -o main main.c