kennwhite

Setting Up Clojure on OS X

I spent a lot of time trying to find a pretty optimal (for me) setup for Clojure… at the same time I was trying to dive in and learn it. This is never optimal; you shouldn't be fighting the environment while trying to learn something.

I feel like I went through a lot of pain searching Google, StackOverflow, blogs, and other sites for random tidbits of information and instructions.

This is a comprehensive "what I learned and what I ended up doing" that will hopefully be of use to others and act as a journal for myself if I ever have to do it again. I want to be very step-by-step and explain what's happening (and why) at each step.

Step 1: Getting Clojure (1.3)

kennwhite

#!/usr/bin/env bash
#
# Upload a file to the Amazon S3 service
# Usage:
#  neckbeard-push FILE S3_BUCKET [-a ACL_POLICY] [-i AWS_ACCESS_ID] [-k AWS_SECRET_KEY] [-d debug] [-l write verbose session log]
# Note: If option -l is requested, curl_session.log contains SSL handshake *and* plaintext AWS keys
#
# Ex 1: neckbeard-push foo.log my-bucket -a public-read  (with env vars: $AWS_ACCESS_ID & $AWS_SECRET_KEY)
# Ex 2: neckbeard-push foo.log my-bucket -a private -i AKIXXXXX -k aBcDeFgHxxx -d
#

kennwhite

#!/usr/bin/env bash
#
# Example of multiple key AES encryption for text files using the openssl v. 0.9.8+ command line utility
# Uses n public certs as key for MIME PKCS envelope, any individual private key can decrypt.
#
# If standard RSA ssh keys exist, these can be converted to public certs as well (and ssh keys can decrypt)
# 
# To sign (and verify) the encrypted file, one of the private keys is required, see:
#    http://www.openssl.org/docs/apps/smime.html#EXAMPLES for openssl smime examples
# or http://www.openssl.org/docs/apps/cms.html#EXAMPLES for cms utility (OpenSSL v. 1.0+)

kennwhite

Keybase proof

I hereby claim:

• I am kennwhite on github.
• I am kwhite (https://keybase.io/kwhite) on keybase.
• I have a public key whose fingerprint is 757B 3A56 7E3C 9BF6 CE78 0C2D A01E DA60 0C2A 97FE

To claim this, I am signing this object:

kennwhite

/*
Constant-time integer comparisons
 
Written in 2014 by Samuel Neves <sneves@dei.uc.pt>
 
To the extent possible under law, the author(s) have dedicated all copyright
and related and neighboring rights to this software to the public domain
worldwide. This software is distributed without any warranty.
 
You should have received a copy of the CC0 Public Domain Dedication along with

kennwhite

#!/bin/bash
# vifs can be used too, but this works.
sudo sh -c "echo UUID=`diskutil info /Volumes/WD\ SmartWare/ | grep 'UUID' | awk '{print $NF}'` none hfs rw,noauto 0 0 >> /etc/fstab"

kennwhite

# Simple powershell (built-in to Win7/8) utility script
#  to compute sha256 (or md5, sha1 or sha512) of a file
#
# Usage:
# C:\> powershell
# PS .\hash filename.ext [sha|md5|sha256|sha512]
#
# May require: Control Panel/System/Admin/Windows Power Shell Modules, then: set-executionpolicy remotesigned
#
# Based on James Manning's and Mike Wilbur's get-hashes and get-sha256 MSDN scripts

kennwhite

/*
CVE-2014-4699 ptrace stack control POC By Andy Lutomirski
See: http://www.openwall.com/lists/oss-security/2014/07/08/16
*/
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/syscall.h>
#include <sys/user.h>
#include <unistd.h>

kennwhite

If completely wiping & reinstalling a Postgres DB, when running initdb like:

service postgresql-9.2 initdb -E 'UTF8' --pgdata="/foo/bar/"

you can encounter this service error:

Data directory is not empty! [FAILED]

To fix it (and this is the nuclear option -- all db data is wiped!)

kennwhite

# Print random number range, Linux or OSX:
# ex: 4707 
cat /dev/urandom | od -N2 -An -i|awk -v f=1 -v r=65000 '{printf "%i\n", f + r * $1 / 65536}' | head -n 1

# Create OSX dictionary-based passphrases 
# Ex: banish-wilsomeness-piquant
cnt=$( wc -l /usr/share/dict/words | awk '{print $1;}' ); \
for i in {1..3}
do awk -v lineno=$(jot -r 1 1 $cnt) 'lineno==NR{printf $0"-" ;exit}' \
/usr/share/dict/words