#!/bin/sh

# puss.sh version 7
#
# Based on:
# <https://gist.githubusercontent.com/Jan69/facb130bc938ffd5ec1
# b51ff964406c1/raw/4fff75fa24e3718a45a26317d679962982b04d0b/puss.sh>
#
# pusswordstore - jan6's simple, *nix password manager
# name comes from combining "pus" with "passwordstore", as it's
# inspired from passwordstore.org, but without the unneeded complexity
# should work with any posix shell, in any posix-ish environment, with
# any encryption tool

list() {
    find "$puss_dir" -type f | sed \
        -e "s|^$puss_dir/||"       \
        -e "/^\$/d"                \
        -e "s/\.${puss_ext##.}$//"
}

# en-/decryption wrapper
# use whatever tool you want, gpg, scrypt, age, openssl enc, you name it

puss_crypt() {
    case "$1" in
    ("-e")
        # encryption, $2 is the filename to encrypt,
        # encrypted file should be same as original filename
        # you most likely need an intermediary file, else you'll
        # corrupt or trunctate it (unless you read into memory first)
        # scrypt enc "$2" >"$2.new" &&
        recip=$(cat $puss_dir/.gpg-id)
        if [ -z "$recip" ]
        then
            echo "Couldn't find GPG encryption id in $puss_dir/.gpg-id"
            exit -1
        fi
        gpg2 -e -r "$recip" --quiet --compress-algo=none \
            --no-encrypt-to --pinentry-mode loopback -o "$2.new" "$2"
        cat "$2.new" >"$2" &&
        rm -f "$2.new"
        ;;
    ("-d")
        # decryption, print to stdout
        # scrypt dec "$2"
        gpg2 -d --quiet --compress-algo=none --no-encrypt-to \
            --pinentry-mode loopback "$2"
        ;;
    ("-c")
        # decryption, non-stdout, "copy to clipboard" or similar
        puss_crypt "$@" | xclip
        ;;
    esac
}

puss() {
    puss_dir="$(readlink -f ${puss_dir:-~/.pusswordstore})"
    puss_ext=".gpg"
    mkdir -p "$puss_dir"
    pw="$puss_dir/$2$puss_ext"
    case "$1" in
    ("add"|"insert")
        read -r i
        echo $i >"$pw" && puss_crypt -e "$pw"
        ;;
    ("del"|"rm")
        rm "$pw"
        ;;
    ("edit")
        t="$(mktemp)"
        cp -p "$pw" "$t"
        puss_crypt -d "$pw" >"$t"
        if [ $? -eq 0 ]
        then
            "${EDITOR:-vi}" "$t" &&
            puss_crypt -e "$t"
            mv "$t" "$pw"
        fi
        ;;
    ("read")
        puss_crypt -d "$pw"
        ;;
    ("search")
        list | grep -i "$2"
        ;;
    (""|"ls"|"list")
        list
        ;;
    ("--help"|"-h")
        echo "usage: $0 add password | del password | edit password | [read] password | list"
        ;;
    (*)
        pw="$puss_dir/$1$puss_ext"
        puss_crypt -d "$pw"
        ;;
   esac
}

puss "$@"