zhangw’s gists

nogweii / Test.java

Created October 1, 2013 23:39

A quick test to see if you have the JCE Unlimited Strength Jurisdiction Policy files installed. If you don't, in Java 6 you'll see 128. If you do, you'll see 2147483647. Thanks to http://stackoverflow.com/questions/11538746/check-for-jce-unlimited-strength-jurisdiction-policy-files

	import javax.crypto.Cipher;

	class Test {
	public static void main(String[] args) {
	try {
	System.out.println("Hello World!");
	int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
	System.out.println(maxKeyLen);
	} catch (Exception e){
	System.out.println("Sad world :(");

creationix / output.log

Created May 8, 2013 22:02

Working version of generator async code sample. Using node from https://github.com/andywingo/node/tree/v8-3.19

	tim@touchsmart:~/Code$ nvm use v0.11.2-generators
	Now using node v0.11.2-generators
	tim@touchsmart:~/Code$ node --harmony testgen.js
	<Buffer 76 61 72 20 66 73 20 3d 20 72 65 71 75 69 72 65 28 27 66 73 27 29 3b 0a 66 75 6e 63 74 69 6f 6e 20 72 65 61 64 46 69 6c 65 28 70 61 74 68 2c 20 65 6e 63 ...>
	Sleeping for 2000ms...
	Done

jimothyGator / README.md

Last active December 20, 2024 09:08

Nginx configuration for Mac OS X with Homebrew, using sites-enabled directory.

mkdir -p /usr/local/etc/nginx/sites-{enabled,available}
cd /usr/local/etc/nginx/sites-enabled
ln -s ../sites-available/default.conf
ln -s ../sites-available/default-ssl.conf

File locations:

nginx.conf to /usr/local/etc/nginx/
default.conf and default-ssl.conf to /usr/local/etc/nginx/sites-available
homebrew.mxcl.nginx.plist to /Library/LaunchDaemons/

zhangw / GFWDetector.py

Created January 30, 2013 07:03 — forked from gradetwo/GFWDetector.py

	#!/usr/bin/env python

	import logging
	from scapy.all import *
	logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

	fakeip = ["4.36.66.178", "8.7.198.45", "37.61.54.158", "46.82.174.68", "59.24.3.173", "64.33.88.161", "64.33.99.47", "64.66.163.251", "65.104.202.252", "65.160.219.113", "66.45.252.237", "72.14.205.104", "72.14.205.99", "78.16.49.15", "93.46.8.89", "128.121.126.139", "159.106.121.75", "169.132.13.103", "192.67.198.6", "202.106.1.2", "202.181.7.85", "203.161.230.171", "207.12.88.98", "208.56.31.43", "209.145.54.50", "209.220.30.174", "209.36.73.33", "211.94.66.147", "213.169.251.35", "216.221.188.182", "216.234.179.13"]
	testdomain = ["twitter.com", "facebook.com", "youtube.com"]
	dnshost = "8.8.8.8"
	for h in testdomain:

gradetwo / GFWDetector.py

Created January 23, 2013 07:00

Use special domains (eg. twitter.com) to trigger GFW DNS Poisoning, detecting it's deployment by incr TTL

	#!/usr/bin/env python

	import logging
	from scapy.all import *
	logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

	fakeip = ["4.36.66.178", "8.7.198.45", "37.61.54.158", "46.82.174.68", "59.24.3.173", "64.33.88.161", "64.33.99.47", "64.66.163.251", "65.104.202.252", "65.160.219.113", "66.45.252.237", "72.14.205.104", "72.14.205.99", "78.16.49.15", "93.46.8.89", "128.121.126.139", "159.106.121.75", "169.132.13.103", "192.67.198.6", "202.106.1.2", "202.181.7.85", "203.161.230.171", "207.12.88.98", "208.56.31.43", "209.145.54.50", "209.220.30.174", "209.36.73.33", "211.94.66.147", "213.169.251.35", "216.221.188.182", "216.234.179.13"]
	testdomain = ["twitter.com", "facebook.com", "youtube.com"]
	dnshost = "8.8.8.8"
	for h in testdomain:

kgriffs / sysctl.conf

Last active March 21, 2025 04:08

Linux Web Server Kernel Tuning

	# Configuration file for runtime kernel parameters.
	# See sysctl.conf(5) for more information.

	# See also http://www.nateware.com/linux-network-tuning-for-2013.html for
	# an explanation about some of these parameters, and instructions for
	# a few other tweaks outside this file.
	#
	# See also: https://gist.github.com/kgriffs/4027835
	#
	# Assumes a beefy machine with lots of network bandwidth

adamawolf / Apple_mobile_device_types.txt

Last active April 3, 2025 17:16

List of Apple's mobile device codes types a.k.a. machine ids (e.g. `iPhone1,1`, `Watch1,1`, etc.) and their matching product names

	i386 : iPhone Simulator
	x86_64 : iPhone Simulator
	arm64 : iPhone Simulator
	iPhone1,1 : iPhone
	iPhone1,2 : iPhone 3G
	iPhone2,1 : iPhone 3GS
	iPhone3,1 : iPhone 4
	iPhone3,2 : iPhone 4 GSM Rev A
	iPhone3,3 : iPhone 4 CDMA
	iPhone4,1 : iPhone 4S

jboner / latency.txt

Last active April 3, 2025 21:26

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

bricef / AES.c

Last active May 11, 2024 21:15

A simple example of using AES encryption in Java and C.

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	/*
	* MCrypt API available online:
	* http://linux.die.net/man/3/mcrypt
	*/
	#include <mcrypt.h>

kinopyo / gist:2426829

Created April 20, 2012 07:23

Ruby: Get module name or class name without module

	n = Notification::Answer.new
	n.class.name.split('::').last \|\| ''
	# => "Answer"
	n.class.name.split('::').first \|\| ''
	# => "Notification"

vincent zhangw