1#!/usr/bin/env bash
  2# pw - a mnml password manager
  3
  4# export PW_DIR to your own path
  5[[ -z "$PW_DIR" ]] && PW_DIR="$HOME/.pw"
  6
  7init() {
  8    if [[ ! -e "$PW_DIR" ]]; then
  9        mkdir -p "$PW_DIR"
 10        echo "pw: password directory initialized at $PW_DIR"
 11    else
 12        echo "PW_DIR is $PW_DIR" 
 13        die "$PW_DIR exists"
 14    fi
 15}
 16
 17add() {
 18    # $1: path to file
 19    # $2 [optional]: password text
 20    [[ -z "$PW_KEY" ]] && die "\$PW_KEY not set"
 21
 22    if [[ "$#" -eq 2 ]]; then
 23        pass="$2"
 24    else
 25        pass="$(pwgen 25 1 -s)"
 26        echo "pw: generated password for $1"
 27    fi
 28    if [[ ! -f "$PW_DIR/$1.gpg" ]]; then
 29        echo "$pass" | gpg2 -er "$PW_KEY" -o "$PW_DIR/$1.gpg"
 30        echo "pw: $PW_DIR/$1.gpg created"
 31    else
 32        die "the file $PW_DIR/$1.gpg exists"
 33    fi
 34}
 35
 36del() {
 37    read -rn 1 -p "pw: are you sure you want to delete $1? [y/n]: "
 38    printf "\n"
 39    [[ "$REPLY" == [yY] ]] && {
 40        rm -f "$PW_DIR/$1.gpg"
 41        echo "pw: deleted $1"
 42    }
 43}
 44
 45show() {
 46    gpg2 --decrypt --quiet --use-agent "$PW_DIR/$1.gpg"
 47}
 48
 49copy() {
 50    show "$1" | xclip -selection clipboard
 51    echo "pw: copied $1 to clipboard"
 52}
 53
 54usage() {
 55    usage="
 56pw - mnml password manager
 57
 58usage: pw [options]
 59All options except -i and -h require a NAME argument.
 60
 61options:
 62  -i            Initializes password directory at \$HOME/.pw or at \$PW_DIR, if it exists.
 63  -a            Add a password.
 64  -g            Generate a password.
 65  -s            Print password to STDOUT.
 66  -c            Copy existing password to clipboard.
 67  -d            Delete password.  
 68  -h            Display this help message and exit.
 69
 70Requires PW_KEY to be set. Optionally, set PW_DIR for custom directory location.
 71"
 72
 73    echo "$usage"
 74    exit 1
 75}
 76
 77die() {
 78    printf "error: %s\n" "$1"
 79    exit 1
 80}
 81
 82
 83main() {
 84    [[ -z "$1" ]] && {
 85        usage
 86    }
 87
 88    while getopts "ia:g:s:c:d:h" options
 89    do
 90        case "$options" in
 91            i) init ;;
 92            g) add "$OPTARG" ;;
 93            a) 
 94               read -rsp "enter password: " pass
 95               printf "\n"
 96               add "$OPTARG" "$pass"
 97               ;;
 98            s) show "$OPTARG" ;;
 99            c) copy "$OPTARG" ;;
100            d) del "$OPTARG" ;;
101            *|h) usage ;;
102        esac
103    done
104    
105    shift $(( OPTIND -1 ))
106}
107
108main "$@"