blob: 05a6668551a9e632c230b5a8ed6dd42ef5cb2cc0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
# $OpenBSD: cfgmatch.sh,v 1.13 2021/06/08 06:52:43 djm Exp $
# Placed in the Public Domain.
tid="sshd_config match"
pidfile=$OBJ/remote_pid
fwdport=3301
fwd="-L $fwdport:127.0.0.1:$PORT"
echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_config
echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_proxy
start_client()
{
rm -f $pidfile
${SSH} -q $fwd "$@" somehost \
exec sh -c \'"echo \$\$ > $pidfile; exec sleep 100"\' \
>>$TEST_REGRESS_LOGFILE 2>&1 &
client_pid=$!
# Wait for remote end
n=0
while test ! -f $pidfile ; do
sleep 1
n=`expr $n + 1`
if test $n -gt 60; then
kill $client_pid
fatal "timeout waiting for background ssh"
fi
done
}
stop_client()
{
pid=`cat $pidfile`
if [ ! -z "$pid" ]; then
kill $pid
fi
wait
}
cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
echo "PermitOpen 127.0.0.1:1 # comment" >>$OBJ/sshd_config
echo "Match Address 127.0.0.1" >>$OBJ/sshd_config
echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_config
grep -v AuthorizedKeysFile $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy
echo "AuthorizedKeysFile /dev/null # comment" >>$OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_proxy
echo "Match user $USER" >>$OBJ/sshd_proxy
echo "AuthorizedKeysFile /dev/null $OBJ/authorized_keys_%u" >>$OBJ/sshd_proxy
echo "Match Address 127.0.0.1 # comment" >>$OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_proxy
${SUDO} ${SSHD} -f $OBJ/sshd_config -T >/dev/null || \
fail "config w/match fails config test"
start_sshd
# Test Match + PermitOpen in sshd_config. This should be permitted
trace "match permitopen localhost"
start_client -F $OBJ/ssh_config
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
fail "match permitopen permit"
stop_client
# Same but from different source. This should not be permitted
trace "match permitopen proxy"
start_client -F $OBJ/ssh_proxy
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
fail "match permitopen deny"
stop_client
# Retry previous with key option, should also be denied.
cp /dev/null $OBJ/authorized_keys_$USER
for t in ${SSH_KEYTYPES}; do
printf 'permitopen="127.0.0.1:'$PORT'" ' >> $OBJ/authorized_keys_$USER
cat $OBJ/$t.pub >> $OBJ/authorized_keys_$USER
done
trace "match permitopen proxy w/key opts"
start_client -F $OBJ/ssh_proxy
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
fail "match permitopen deny w/key opt"
stop_client
# Test both sshd_config and key options permitting the same dst/port pair.
# Should be permitted.
trace "match permitopen localhost"
start_client -F $OBJ/ssh_config
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
fail "match permitopen permit"
stop_client
cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy
echo "Match User $USER" >>$OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy
# Test that a Match overrides a PermitOpen in the global section
trace "match permitopen proxy w/key opts"
start_client -F $OBJ/ssh_proxy
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
fail "match override permitopen"
stop_client
cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy
echo "Match User NoSuchUser" >>$OBJ/sshd_proxy
echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy
# Test that a rule that doesn't match doesn't override, plus test a
# PermitOpen entry that's not at the start of the list
trace "nomatch permitopen proxy w/key opts"
start_client -F $OBJ/ssh_proxy
${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
fail "nomatch override permitopen"
stop_client
# Test parsing of available Match criteria (with the exception of Group which
# requires knowledge of actual group memberships user running the test).
params="user:user:u1 host:host:h1 address:addr:1.2.3.4 \
localaddress:laddr:5.6.7.8 rdomain:rdomain:rdom1"
cp $OBJ/sshd_proxy_bak $OBJ/sshd_config
echo 'Banner /nomatch' >>$OBJ/sshd_config
for i in $params; do
config=`echo $i | cut -f1 -d:`
criteria=`echo $i | cut -f2 -d:`
value=`echo $i | cut -f3 -d:`
cat >>$OBJ/sshd_config <<EOD
Match $config $value
Banner /$value
EOD
done
${SUDO} ${SSHD} -f $OBJ/sshd_config -T >/dev/null || \
fail "validate config for w/out spec"
# Test matching each criteria.
for i in $params; do
testcriteria=`echo $i | cut -f2 -d:`
expected=/`echo $i | cut -f3 -d:`
spec=""
for j in $params; do
config=`echo $j | cut -f1 -d:`
criteria=`echo $j | cut -f2 -d:`
value=`echo $j | cut -f3 -d:`
if [ "$criteria" = "$testcriteria" ]; then
spec="$criteria=$value,$spec"
else
spec="$criteria=1$value,$spec"
fi
done
trace "test spec $spec"
result=`${SUDO} ${SSHD} -f $OBJ/sshd_config -T -C "$spec" | \
awk '$1=="banner"{print $2}'`
if [ "$result" != "$expected" ]; then
fail "match $config expected $expected got $result"
fi
done
|
