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1 #	$OpenBSD: hostkey-agent.sh,v 1.6 2015/07/10 06:23:25 markus Exp $
2 #	Placed in the Public Domain.
3 
4 tid="hostkey agent"
5 
6 rm -f $OBJ/agent-key.* $OBJ/ssh_proxy.orig $OBJ/known_hosts.orig
7 
8 trace "start agent"
9 eval `${SSHAGENT} -s` > /dev/null
10 r=$?
11 [ $r -ne 0 ] && fatal "could not start ssh-agent: exit code $r"
12 
13 grep -vi 'hostkey' $OBJ/sshd_proxy > $OBJ/sshd_proxy.orig
14 echo "HostKeyAgent $SSH_AUTH_SOCK" >> $OBJ/sshd_proxy.orig
15 
16 trace "load hostkeys"
17 for k in `${SSH} -Q key-plain` ; do
18 	${SSHKEYGEN} -qt $k -f $OBJ/agent-key.$k -N '' || fatal "ssh-keygen $k"
19 	(
20 		printf 'localhost-with-alias,127.0.0.1,::1 '
21 		cat $OBJ/agent-key.$k.pub
22 	) >> $OBJ/known_hosts.orig
23 	${SSHADD} $OBJ/agent-key.$k >/dev/null 2>&1 || \
24 		fatal "couldn't load key $OBJ/agent-key.$k"
25 	echo "Hostkey $OBJ/agent-key.${k}" >> $OBJ/sshd_proxy.orig
26 	# Remove private key so the server can't use it.
27 	rm $OBJ/agent-key.$k || fatal "couldn't rm $OBJ/agent-key.$k"
28 done
29 cp $OBJ/known_hosts.orig $OBJ/known_hosts
30 
31 unset SSH_AUTH_SOCK
32 
33 for ps in no yes; do
34 	for k in `${SSH} -Q key-plain` ; do
35 		verbose "key type $k privsep=$ps"
36 		cp $OBJ/sshd_proxy.orig $OBJ/sshd_proxy
37 		echo "UsePrivilegeSeparation $ps" >> $OBJ/sshd_proxy
38 		echo "HostKeyAlgorithms $k" >> $OBJ/sshd_proxy
39 		opts="-oHostKeyAlgorithms=$k -F $OBJ/ssh_proxy"
40 		cp $OBJ/known_hosts.orig $OBJ/known_hosts
41 		SSH_CONNECTION=`${SSH} $opts host 'echo $SSH_CONNECTION'`
42 		if [ $? -ne 0 ]; then
43 			fail "protocol $p privsep=$ps failed"
44 		fi
45 		if [ "$SSH_CONNECTION" != "UNKNOWN 65535 UNKNOWN 65535" ]; then
46 			fail "bad SSH_CONNECTION key type $k privsep=$ps"
47 		fi
48 	done
49 done
50 
51 trace "kill agent"
52 ${SSHAGENT} -k > /dev/null
53 
54