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#!/bin/sh
# tool for managing the ACF passwords
passwdfile=${ACFPASSWD:-/etc/acf/passwd}
shadow=${SHADOW:-/etc/shadow}
usage() {
echo "usage: acfpasswd [-s] USER"
echo ""
exit 1
}
die() {
echo "$@" >&2
exit 1
}
find_user_or_die() {
local user="$1"
grep -q "^${user}:" "$passwdfile" \
|| die "user '$user' was not found in $passwdfile"
}
set_pw_hash() {
local user="$1"
local pwhash="$2"
# use : as sed separator since its guaranteed to no be valid in shadow
sed -i -e "s:^${user}\:[^\:]*\::${user}\:${pwhash}\::" "$passwdfile"
}
syncpasswd() {
local user="$1"
local pwhash=$(awk -F: -v user="$user" '$1 == user { print $2 }' \
$shadow) || exit
find_user_or_die "$user"
[ -z "$pwhash" ] && die "user '$user' was not found in $shadow"
set_pw_hash "$user" "$pwhash"
exit
}
sync_with_system=
while getopts "hs" opt; do
case "$opt" in
h) usage;;
s) sync_with_system=yes;;
esac
done
shift $(($OPTIND - 1))
user="$1"
[ -z "$user" ] && usage
[ -n "$sync_with_system" ] && syncpasswd "$user"
# set password for given user
find_user_or_die "$user"
tries=0
while true; do
echo -n "Enter new ACF password for $user (will not echo): "
hash=$(mkpasswd -m sha | tail -n1)
salt=$(echo "$hash" | cut -d$ -f3)
echo ""
echo -n "Re-enter the ACF password (will not echo): "
hash2=$(mkpasswd -S "$salt" -m sha | tail -n1)
echo ""
[ "$hash" = "$hash2" ] && break
echo -n "The entered passwords does not match. "
tries=$(( $tries + 1))
if [ $tries -gt 3 ]; then
die "ACF password was NOT changed"
else
echo "Please try again."
fi
done
set_pw_hash "$user" "$hash" && echo "ACF password for $user was changed."
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