initial commit

usr/local/sbin/openssl-ocsp

@@ -0,0 +1,73 @@
+#!/bin/sh
+# SPDX-License-Identifier: Apache-2.0
+# (c) 2024, Konstantin Demin
+
+set -ef
+
+usage() {
+	cat >&2 <<-EOF
+	# usage: ${0##*/} <in:issuer.pem> <in:cert.pem> <out:ocsp.der>
+	EOF
+	exit "${1:-0}"
+}
+[ $# != 0 ] || usage
+
+arg_ok=
+while : ; do
+	[ -n "$1" ] || break
+	[ -s "$1" ] || break
+	[ -n "$2" ] || break
+	[ -s "$2" ] || break
+	[ -n "$3" ] || break
+	arg_ok=1
+break ; done
+[ -n "${arg_ok}" ] || usage 1
+unset arg_ok
+
+chain="$1"
+cert="$2"
+ocsp="$3"
+
+ocsp_uri=$(openssl x509 -in "${cert}" -noout -ocsp_uri | head -n 1)
+[ -n "${ocsp_uri}" ] || exit 0
+
+umask 0077
+t=$(mktemp) ; : "${t:?}"
+umask 0022
+
+ossl_ocsp_fetch() {
+	openssl ocsp \
+	  -timeout 5 -nonce \
+	  -issuer "$1" -cert "$2" -url "$3" -respout "$4"
+}
+
+ossl_ocsp_read() {
+	openssl ocsp \
+	  -issuer "$1" -cert "$2" -respin "$3" -resp_text
+}
+
+for i in $(seq 1 3) ; do
+	if ossl_ocsp_fetch "${chain}" "${cert}" "${ocsp_uri}" "$t" ; then
+		break
+	fi
+	: > "$t"
+	sleep 5
+done ; unset i
+
+if ! [ -s "$t" ] ; then
+	env printf '%s: unable to fetch OCSP response for %q via %q\n' "${0##*/}" "${cert}" "${ocsp_uri}" >&2
+fi
+
+resp_ok=
+while : ; do
+	[ -s "$t" ] || break
+	ossl_ocsp_read "${chain}" "${cert}" "$t" >/dev/null || break
+	touch "${ocsp}" || break
+	tee "${ocsp}" < "$t" >/dev/null || break
+	chmod 0644 "${ocsp}" || :
+	resp_ok=1
+break ; done
+
+rm -rf "$t"
+[ -n "${resp_ok}" ] || exit 1
+exit 0