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#!/bin/sh
#
# Simple script to generate iwd network files.
[ "$1" ] || {
printf '%s\n' "usage: printf pass | ${0##*/} ssid" >&2
exit 1
}
# Read the password from 'stdin'.
read -r pass; [ "$pass" ] || exit 1
# Consider all characters as single-byte.
export LC_CTYPE=C
# The SSID appears verbatim in the name if it contains
# only alphanumeric characters, spaces, underscores or
# minus signs. Otherwise it is encoded as an equal sign
# followed by the lower-case hex encoding of the name.
case $1 in
*[!A-Za-z0-9_' '-]*)
ssid="=$(printf %s "$1" | od -vA n -t x1 | tr -d '\n ')"
;;
*)
ssid=$1
;;
esac
printf '%s\n\n' "Save this output to /var/lib/iwd/$ssid.psk" >&2
printf '[Security]\n'
printf 'Passphrase=%s\n' "$pass"
printf '\nTIP: You can use this output directly as the\n' >&2
printf ' help messages are printed to stderr.\n' >&2
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