#! /usr/bin/bash
#
# This work is in the public domain.
#
# It was completed by Arun I in 2016.
#
# Though you are not legally obliged to do so, I would appreciate it
# if you credit me for this work by not removing this notice, and
# hopefully linking to my blog post at
# https://systemreboot.net/post/simple-passphrase-generator-in-bash

WORDLIST=~/eff_large_wordlist.txt
NO_OF_WORDS=6

function random-line {
    NO_OF_LINES=$1
    RANDOM_NO=$(od -An -N 2 -t u2 < /dev/random)
    if [[ $RANDOM_NO -lt $NO_OF_LINES ]]
    then
	echo $(expr $RANDOM_NO + 1)
    else
	random-line $NO_OF_LINES
    fi
}

NO_OF_LINES=$(wc -l < $WORDLIST)
for i in $(seq 1 $NO_OF_WORDS)
do
    RANDOM_LINE=$(random-line $NO_OF_LINES)
    RANDOM_WORD=$(sed -n ${RANDOM_LINE}p $WORDLIST | awk '{print $2}')
    printf "%s " $RANDOM_WORD
done
printf "\n"