Quick and dirty password generator for macOS

passwd_gen.sh

#!/bin/bash
# Generates readable, word based passwords with random numbers attached.
# Example pass: Foo73-bar22
# Passwords take 'centuries' to crack according to https://github.com/dropbox/zxcvbn

DICT_FILE='/usr/share/dict/words'
#DICT_FILE_LENGTH=`python -c "import sys;num_lines = sum(1 for line in open('/usr/share/dict/words'));print num_lines"`
DICT_FILE_LENGTH='235886'
RANDOM_NUM=`od -vAn -N4 -tu < /dev/urandom`
RANDOM_NUM2=`od -vAn -N4 -tu < /dev/urandom`

WORD_ONE_IDX=`echo "$RANDOM_NUM % $DICT_FILE_LENGTH" | bc`
WORD_TWO_IDX=`echo "$RANDOM_NUM2 % $DICT_FILE_LENGTH" | bc`

WORD_ONE=`sed -n ''"$WORD_ONE_IDX"'p' < $DICT_FILE`
WORD_TWO=`sed -n ''"$WORD_TWO_IDX"'p' < $DICT_FILE`

NUM_ONE=`echo $((1 + RANDOM % 99))`
NUM_TWO=`echo $((1 + RANDOM % 99))`

# Uppercase the first letter.
WORD_ONE=`echo $WORD_ONE | perl -ne 'print ucfirst'`

echo "$WORD_ONE$NUM_ONE-$WORD_TWO$NUM_TWO" | tee /dev/tty | pbcopy
echo "Copied above password to clipboard."

Web equivalents here:

• Secure Password Generator in JS github repo
• Web Secure Password Generator