From 1151d1cc4a804bbc627f342e15faa94a647d88a9 Mon Sep 17 00:00:00 2001
From: Lucas <lucas@domain.invalid>
Date: Fri, 10 Jul 2020 01:15:29 +0000
Subject: [PATCH] Add script for generating otpauth:// URIs

---
 utils/scripts/create-otp-uri.sh | 57 +++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 utils/scripts/create-otp-uri.sh

diff --git a/utils/scripts/create-otp-uri.sh b/utils/scripts/create-otp-uri.sh
new file mode 100644
index 0000000..5738a0c
--- /dev/null
+++ b/utils/scripts/create-otp-uri.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+# env
+# Written in 2020 by Lucas
+# CC0 1.0 Universal/Public domain - No rights reserved
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty. You should have received a copy of the CC0 Public Domain
+# Dedication along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+usage()
+{
+	cat - <<EOF >&2
+Usage:
+	${0##*/} [-d digits] [-p period] [-a algorithm]
+	${0##*/} [-H counter] [-d digits] [-a algorithm]
+EOF
+	exit 1
+}
+
+err()
+{
+	printf "%s: %s\n" "${0##*/}" "$*" >&2
+	exit 1
+}
+
+algorithm=
+counter=
+digits=
+period=
+type=totp
+while getopts a:d:H:p: flag; do
+	case $flag in
+	a)	algorithm=$OPTARG
+		;;
+	d)	digits=$OPTARG
+		;;
+	H)	counter=$OPTARG
+		type=hotp
+		;;
+	p)	period=$OPTARG
+		;;
+	*)	usage
+		;;
+	esac
+done
+
+printf "otpauth://%s/" "$type"
+printf "?secret="
+cat - | tr -d "\n"
+[ -n "$algorithm" ] && printf "&algorithm=%s" "$algorithm"
+[ -n "$counter" ] && printf "&counter=%s" "$counter"
+[ -n "$digits" ] && printf "&digits=%s" "$digits"
+[ -n "$period" ] && printf "&period=%s" "$period"
+printf "\n"