pash/pash-posix

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#!/bin/sh
#
# pash - simple password manager.
pw_add() {
pass_name=$1
set -- -c
if yn "Generate a password?"; then
pass=$("$gpg" --gen-random --armor "${PASH_LENGTH:-50}" |\
cut -c -"${PASH_LENGTH:-50}")
else
printf 'Enter password: '
stty -echo
read -r pass
stty echo
printf '\n'
fi
[ "$pass" ] ||
die "Failed to generate a password."
[ "$PASH_KEYID" ] &&
set -- --trust-model always -aer "$PASH_KEYID"
echo "$pass" | GPG_TTY=$(tty) "$gpg" "$@" -o "$pass_name.gpg"
}
pw_del() {
yn "Delete pass file '$1'?" && {
rm -f "$1.gpg"
rmdir -p "${1%/*}" 2>/dev/null
}
}
pw_show() {
pass=$("$gpg" -dq "$1.gpg")
[ "$2" ] || printf '%s\n' "$pass"
}
pw_copy() {
pw_show "$1" copy
if [ "$TMUX" ]; then
tmux load-buffer "$pass"
else
hash xclip && echo "$pass" | xclip -selection clipboard
fi
}
pw_list() {
if hash tree 2>/dev/null; then
tree --noreport
else
find . -mindepth 1
fi
}
yn() {
printf '%s [y/n]: ' "$1"
# Enable raw input to allow for a single
# byte to be read from stdin without needing
# to wait for the user to press Return.
stty -icanon
# Read a single byte from stdin using 'dd'.
# POSIX 'read' has no support for single or
# 'N' character based input from the user.
REPLY=$(dd ibs=1 count=1 2>/dev/null)
# Disable raw input, leaving the terminal
# how we *should* have found it.
stty icanon
printf '\n'
# Handle the answer here directly enabling
# this function's return status to be used
# in place of repeating this code throughout.
glob "$REPLY" '[yY]' || return 1 && return 0
}
glob() {
# This is a simple wrapper around a case
# statement to allow for simple string
# comparisons against globs.
#
# Example: if glob "Hello World" '* World'; then
case $1 in $2) return 0; esac; return 1
}
die() {
printf 'error: %s\n' "$1" >&2
exit 1
}
usage() { printf %s "\
pash 1.0.0 - simple password manager.
=> [a]dd [name] - Create a new password entry.
=> [c]opy [name] - Copy entry to the clipboard.
=> [d]el [name] - Delete a password entry.
=> [l]ist - List all entries.
=> [s]how [name] - Show password for an entry.
Using a key pair: export PASH_KEYID=XXXXXXXX
Password length: export PASH_LENGTH=50
Store location: export PASH_DIR=~/.local/share/pash
"
exit 1
}
main() {
[ "$1" = '-?' ] || [ -z "$1" ] &&
usage
hash gpg 2>/dev/null && gpg=gpg
hash gpg2 2>/dev/null && gpg=gpg2
[ "$gpg" ] || die "GPG not found."
mkdir -p "${PASH_DIR:=${XDG_DATA_HOME:=$HOME/.local/share}/pash}" ||
die "Couldn't create password directory."
cd "$PASH_DIR" ||
die "Can't access password directory."
glob "$1" '[acds]*' && [ -z "$2" ] &&
die "Missing [name] argument."
glob "$1" '[cds]*' && [ ! -f "$2.gpg" ] &&
die "Pass file '$2' doesn't exist."
glob "$1" 'a*' && [ -f "$2.gpg" ] &&
die "Pass file '$2' already exists."
glob "$2" '*/*' && glob "$2" '*../*' &&
die "Category went out of bounds."
glob "$2" '/*' &&
die "Category can't start with '/'."
glob "$2" '*/*' &&
{ mkdir -p "${2%/*}" || die "Couldn't create category '${2%/*}'."; }
umask 077
case $1 in
a*) pw_add "$2" && printf '%s\n' "Saved '$2' to store." ;;
c*) pw_copy "$2" ;;
d*) pw_del "$2" ;;
s*) pw_show "$2" ;;
l*) pw_list ;;
*) usage
esac
}
main "$@"