xref: /freebsd/usr.sbin/certctl/certctl.sh (revision 8ddb146abcdf061be9f2c0db7e391697dafad85c) 
1#!/bin/sh
2#-
3# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4#
5# Copyright 2018 Allan Jude <allanjude@freebsd.org>
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted providing that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26# POSSIBILITY OF SUCH DAMAGE.
27#
28# $FreeBSD$
29
30############################################################ CONFIGURATION
31
32: ${DESTDIR:=}
33: ${DISTBASE:=}
34: ${FILEPAT:="\.pem$|\.crt$|\.cer$|\.crl$"}
35: ${VERBOSE:=0}
36
37############################################################ GLOBALS
38
39SCRIPTNAME="${0##*/}"
40ERRORS=0
41NOOP=0
42UNPRIV=0
43
44############################################################ FUNCTIONS
45
46do_hash()
47{
48	local hash
49
50	if hash=$( openssl x509 -noout -subject_hash -in "$1" ); then
51		echo "$hash"
52		return 0
53	else
54		echo "Error: $1" >&2
55		ERRORS=$(( $ERRORS + 1 ))
56		return 1
57	fi
58}
59
60get_decimal()
61{
62	local checkdir hash decimal
63
64	checkdir=$1
65	hash=$2
66	decimal=0
67
68	while [ -e "$checkdir/$hash.$decimal" ]; do
69		decimal=$((decimal + 1))
70	done
71
72	echo ${decimal}
73	return 0
74}
75
76create_trusted_link()
77{
78	local blisthash certhash hash
79	local suffix
80
81	hash=$( do_hash "$1" ) || return
82	certhash=$( openssl x509 -sha1 -in "$1" -noout -fingerprint )
83	for blistfile in $(find $UNTRUSTDESTDIR -name "$hash.*"); do
84		blisthash=$( openssl x509 -sha1 -in "$blistfile" -noout -fingerprint )
85		if [ "$certhash" = "$blisthash" ]; then
86			echo "Skipping untrusted certificate $1 ($blistfile)"
87			return 1
88		fi
89	done
90	suffix=$(get_decimal "$CERTDESTDIR" "$hash")
91	[ $VERBOSE -gt 0 ] && echo "Adding $hash.$suffix to trust store"
92	[ $NOOP -eq 0 ] && \
93		install ${INSTALLFLAGS} -lrs $(realpath "$1") "$CERTDESTDIR/$hash.$suffix"
94}
95
96# Accepts either dot-hash form from `certctl list` or a path to a valid cert.
97resolve_certname()
98{
99	local hash srcfile filename
100	local suffix
101
102	# If it exists as a file, we'll try that; otherwise, we'll scan
103	if [ -e "$1" ]; then
104		hash=$( do_hash "$1" ) || return
105		srcfile=$(realpath "$1")
106		suffix=$(get_decimal "$UNTRUSTDESTDIR" "$hash")
107		filename="$hash.$suffix"
108		echo "$srcfile" "$hash.$suffix"
109	elif [ -e "${CERTDESTDIR}/$1" ];  then
110		srcfile=$(realpath "${CERTDESTDIR}/$1")
111		hash=$(echo "$1" | sed -Ee 's/\.([0-9])+$//')
112		suffix=$(get_decimal "$UNTRUSTDESTDIR" "$hash")
113		filename="$hash.$suffix"
114		echo "$srcfile" "$hash.$suffix"
115	fi
116}
117
118create_untrusted()
119{
120	local srcfile filename
121
122	set -- $(resolve_certname "$1")
123	srcfile=$1
124	filename=$2
125
126	if [ -z "$srcfile" -o -z "$filename" ]; then
127		return
128	fi
129
130	[ $VERBOSE -gt 0 ] && echo "Adding $filename to untrusted list"
131	[ $NOOP -eq 0 ] && install ${INSTALLFLAGS} -lrs "$srcfile" "$UNTRUSTDESTDIR/$filename"
132}
133
134do_scan()
135{
136	local CFUNC CSEARCH CPATH CFILE
137	local oldIFS="$IFS"
138	CFUNC="$1"
139	CSEARCH="$2"
140
141	IFS=:
142	set -- $CSEARCH
143	IFS="$oldIFS"
144	for CPATH in "$@"; do
145		[ -d "$CPATH" ] || continue
146		echo "Scanning $CPATH for certificates..."
147		for CFILE in $(ls -1 "${CPATH}" | grep -Ee "${FILEPAT}"); do
148			[ -e "$CPATH/$CFILE" ] || continue
149			[ $VERBOSE -gt 0 ] && echo "Reading $CFILE"
150			"$CFUNC" "$CPATH/$CFILE"
151		done
152	done
153}
154
155do_list()
156{
157	local CFILE subject
158
159	if [ -e "$1" ]; then
160		cd "$1"
161		for CFILE in *.[0-9]; do
162			if [ ! -s "$CFILE" ]; then
163				echo "Unable to read $CFILE" >&2
164				ERRORS=$(( $ERRORS + 1 ))
165				continue
166			fi
167			subject=
168			if [ $VERBOSE -eq 0 ]; then
169				subject=$( openssl x509 -noout -subject -nameopt multiline -in "$CFILE" |
170				    sed -n '/commonName/s/.*= //p' )
171			fi
172			[ "$subject" ] ||
173			    subject=$( openssl x509 -noout -subject -in "$CFILE" )
174			printf "%s\t%s\n" "$CFILE" "$subject"
175		done
176		cd -
177	fi
178}
179
180cmd_rehash()
181{
182
183	if [ $NOOP -eq 0 ]; then
184		if [ -e "$CERTDESTDIR" ]; then
185			find "$CERTDESTDIR" -type link -delete
186		else
187			mkdir -p "$CERTDESTDIR"
188		fi
189		if [ -e "$UNTRUSTDESTDIR" ]; then
190			find "$UNTRUSTDESTDIR" -type link -delete
191		else
192			mkdir -p "$UNTRUSTDESTDIR"
193		fi
194	fi
195
196	do_scan create_untrusted "$UNTRUSTPATH"
197	do_scan create_trusted_link "$TRUSTPATH"
198}
199
200cmd_list()
201{
202	echo "Listing Trusted Certificates:"
203	do_list "$CERTDESTDIR"
204}
205
206cmd_untrust()
207{
208	local BPATH
209
210	shift # verb
211	[ $NOOP -eq 0 ] && mkdir -p "$UNTRUSTDESTDIR"
212	for BFILE in "$@"; do
213		echo "Adding $BFILE to untrusted list"
214		create_untrusted "$BFILE"
215	done
216}
217
218cmd_trust()
219{
220	local BFILE blisthash certhash hash
221
222	shift # verb
223	for BFILE in "$@"; do
224		if [ -s "$BFILE" ]; then
225			hash=$( do_hash "$BFILE" )
226			certhash=$( openssl x509 -sha1 -in "$BFILE" -noout -fingerprint )
227			for BLISTEDFILE in $(find $UNTRUSTDESTDIR -name "$hash.*"); do
228				blisthash=$( openssl x509 -sha1 -in "$BLISTEDFILE" -noout -fingerprint )
229				if [ "$certhash" = "$blisthash" ]; then
230					echo "Removing $(basename "$BLISTEDFILE") from untrusted list"
231					[ $NOOP -eq 0 ] && rm -f $BLISTEDFILE
232				fi
233			done
234		elif [ -e "$UNTRUSTDESTDIR/$BFILE" ]; then
235			echo "Removing $BFILE from untrusted list"
236			[ $NOOP -eq 0 ] && rm -f "$UNTRUSTDESTDIR/$BFILE"
237		else
238			echo "Cannot find $BFILE" >&2
239			ERRORS=$(( $ERRORS + 1 ))
240		fi
241	done
242}
243
244cmd_untrusted()
245{
246	echo "Listing Untrusted Certificates:"
247	do_list "$UNTRUSTDESTDIR"
248}
249
250usage()
251{
252	exec >&2
253	echo "Manage the TLS trusted certificates on the system"
254	echo "	$SCRIPTNAME [-v] list"
255	echo "		List trusted certificates"
256	echo "	$SCRIPTNAME [-v] untrusted"
257	echo "		List untrusted certificates"
258	echo "	$SCRIPTNAME [-nUv] [-D <destdir>] [-d <distbase>] [-M <metalog>] rehash"
259	echo "		Generate hash links for all certificates"
260	echo "	$SCRIPTNAME [-nv] untrust <file>"
261	echo "		Add <file> to the list of untrusted certificates"
262	echo "	$SCRIPTNAME [-nv] trust <file>"
263	echo "		Remove <file> from the list of untrusted certificates"
264	exit 64
265}
266
267############################################################ MAIN
268
269while getopts D:d:M:nUv flag; do
270	case "$flag" in
271	D) DESTDIR=${OPTARG} ;;
272	d) DISTBASE=${OPTARG} ;;
273	M) METALOG=${OPTARG} ;;
274	n) NOOP=1 ;;
275	U) UNPRIV=1 ;;
276	v) VERBOSE=$(( $VERBOSE + 1 )) ;;
277	esac
278done
279shift $(( $OPTIND - 1 ))
280
281: ${METALOG:=${DESTDIR}/METALOG}
282INSTALLFLAGS=
283[ $UNPRIV -eq 1 ] && INSTALLFLAGS="-U -M ${METALOG} -D ${DESTDIR}"
284: ${LOCALBASE:=$(sysctl -n user.localbase)}
285: ${TRUSTPATH:=${DESTDIR}${DISTBASE}/usr/share/certs/trusted:${DESTDIR}${LOCALBASE}/share/certs:${DESTDIR}${LOCALBASE}/etc/ssl/certs}
286: ${UNTRUSTPATH:=${DESTDIR}${DISTBASE}/usr/share/certs/untrusted:${DESTDIR}${LOCALBASE}/etc/ssl/untrusted:${DESTDIR}${LOCALBASE}/etc/ssl/blacklisted}
287: ${CERTDESTDIR:=${DESTDIR}${DISTBASE}/etc/ssl/certs}
288: ${UNTRUSTDESTDIR:=${DESTDIR}${DISTBASE}/etc/ssl/untrusted}
289
290[ $# -gt 0 ] || usage
291case "$1" in
292list)		cmd_list ;;
293rehash)		cmd_rehash ;;
294blacklist)	cmd_untrust "$@" ;;
295untrust)	cmd_untrust "$@" ;;
296trust)		cmd_trust "$@" ;;
297unblacklist)	cmd_trust "$@" ;;
298untrusted)	cmd_untrusted ;;
299blacklisted)	cmd_untrusted ;;
300*)		usage # NOTREACHED
301esac
302
303retval=$?
304[ $ERRORS -gt 0 ] && echo "Encountered $ERRORS errors" >&2
305exit $retval
306
307################################################################################
308# END
309################################################################################
310