Simple way to store and retrieve website passwords encrypted with a master password

pw

#!/bin/bash

# https://gist.github.com/2371406
# version 0.1 - Not much error handling yet.
# version 0.2 - Added --edit command
#
# Add to ~/bin/pw and chmod +x it.
# See bottom of file for usage.

PASSWORD_FILE=~/Documents/.passwords.csv

function cancel_input {
  stty $stty_orig
  echo 'Cancelled.'
  exit
}

function enter_password {
  trap cancel_input SIGINT
  stty_orig=`stty -g`
  stty -echo
  read secret
  stty $stty_orig
  trap SIGINT
}

if [[ $# > 0 ]]; then
  echo 'Enter encryption password:'
  enter_password
  OPTIONS=--force-mdc\ --no-tty\ -q\ --no-use-agent\ --yes\ --passphrase=$secret
fi


function encrypt {
  gpg $OPTIONS -c -o $PASSWORD_FILE.gpg $PASSWORD_FILE
  rm -f $PASSWORD_FILE
}

function decrypt {
  gpg $OPTIONS -o $PASSWORD_FILE $PASSWORD_FILE.gpg
}

function init_password_csv {
  encrypt
}

function edit_password_csv {
  decrypt
  nano $PASSWORD_FILE
  encrypt
}

function add_password {
  echo 'Enter password to add:'
  enter_password
  pass=$secret

  decrypt
  echo $1,$2,$pass >> $PASSWORD_FILE
  encrypt
}

function find_password {
  decrypt
  echo Passwords that match "$1":
  cat $PASSWORD_FILE | grep $1
  rm -f $PASSWORD_FILE
}

if [ $# == 2 ]; then
  add_password $1 $2
elif [ $# == 1 ]; then
  if [ $1 == '--init' ]; then
    init_password_csv
  elif [ $1 == '--edit' ]; then
    edit_password_csv
  else
    find_password $1
  fi
else
  echo 'Usage (1): pw --init          Encrypts a prepared .passwords.csv file'
  echo 'Usage (2): pw --edit          Edit the .passwords.csv file'
  echo 'Usage (3): pw TERM            find a password'
  echo 'Usage (4): pw URL/NAME LOGIN  add a password (prompted to enter)'
  echo 'Add or view a password from a GPG encrypted password file.'
  echo
  echo 'TERM          Term to search for. Can be either a URL, NAME or LOGIN'
  echo 'URL/NAME      A name or URL of a site'
  echo 'LOGIN         Email address or username used to login'
  echo
  exit
fi

An updated version is now in my bin repo at https://github.com/PhilT/bin.