Use the openssl binary/version on OSX to do symmetric crypto.

GhettoCrypt

#!/bin/bash

# Use the openssl binary/version on OSX to do symmetric crypto.
# stephen@senr.io

if [ "$#" != "2" ]
then
    echo "Usage: ghettocrypt.sh encrypt file_to_encrypt.zip" 1>&2
    echo "    OR" 1>&2
    echo "ghettocrypt.sh decrypt file_to_decrypt.zip.enc" 1>&2
    exit 1
fi

function die {
    echo "Something is fucked up. I can't help you. I give up" 1>&2 
    exit 1
}

action=$1
crypt_file=$2

# attempt to do the crypto
if [ "${action}" == "encrypt" ]
then
    echo "Please enter your password, then hit Enter: " 1>&2
    openssl aes-256-cbc -in "${crypt_file}" -out "${crypt_file}.enc" -pass stdin || die
    echo "Your encrypted file written to ${crypt_file}.enc"
fi
if [ "${action}" == "decrypt" ]
then
    echo "Please enter your password, then hit Enter: " 1>&2
    openssl aes-256-cbc -d -in "${crypt_file}" -out "${crypt_file}.decrypted" -pass stdin || die
    echo "Your decrypted file written to ${crypt_file}.decrypted"
fi