159 lines
4.8 KiB
Bash
159 lines
4.8 KiB
Bash
# $OpenBSD: cfgmatch.sh,v 1.12 2019/04/18 18:57:16 dtucker Exp $
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# Placed in the Public Domain.
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tid="sshd_config match"
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pidfile=$OBJ/remote_pid
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fwdport=3301
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fwd="-L $fwdport:127.0.0.1:$PORT"
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echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_config
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echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_proxy
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start_client()
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{
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rm -f $pidfile
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${SSH} -q $fwd "$@" somehost \
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exec sh -c \'"echo \$\$ > $pidfile; exec sleep 100"\' \
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>>$TEST_REGRESS_LOGFILE 2>&1 &
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client_pid=$!
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# Wait for remote end
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n=0
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while test ! -f $pidfile ; do
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sleep 1
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n=`expr $n + 1`
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if test $n -gt 60; then
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kill $client_pid
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fatal "timeout waiting for background ssh"
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fi
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done
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}
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stop_client()
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{
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pid=`cat $pidfile`
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if [ ! -z "$pid" ]; then
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kill $pid
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fi
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wait
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}
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cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
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echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_config
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echo "Match Address 127.0.0.1" >>$OBJ/sshd_config
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echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_config
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grep -v AuthorizedKeysFile $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy
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echo "AuthorizedKeysFile /dev/null" >>$OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_proxy
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echo "Match user $USER" >>$OBJ/sshd_proxy
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echo "AuthorizedKeysFile /dev/null $OBJ/authorized_keys_%u" >>$OBJ/sshd_proxy
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echo "Match Address 127.0.0.1" >>$OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_proxy
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${SUDO} ${SSHD} -f $OBJ/sshd_config -T >/dev/null || \
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fail "config w/match fails config test"
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start_sshd
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# Test Match + PermitOpen in sshd_config. This should be permitted
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trace "match permitopen localhost"
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start_client -F $OBJ/ssh_config
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
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fail "match permitopen permit"
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stop_client
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# Same but from different source. This should not be permitted
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trace "match permitopen proxy"
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start_client -F $OBJ/ssh_proxy
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
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fail "match permitopen deny"
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stop_client
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# Retry previous with key option, should also be denied.
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cp /dev/null $OBJ/authorized_keys_$USER
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for t in ${SSH_KEYTYPES}; do
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printf 'permitopen="127.0.0.1:'$PORT'" ' >> $OBJ/authorized_keys_$USER
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cat $OBJ/$t.pub >> $OBJ/authorized_keys_$USER
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done
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trace "match permitopen proxy w/key opts"
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start_client -F $OBJ/ssh_proxy
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
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fail "match permitopen deny w/key opt"
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stop_client
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# Test both sshd_config and key options permitting the same dst/port pair.
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# Should be permitted.
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trace "match permitopen localhost"
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start_client -F $OBJ/ssh_config
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
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fail "match permitopen permit"
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stop_client
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cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy
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echo "Match User $USER" >>$OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy
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# Test that a Match overrides a PermitOpen in the global section
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trace "match permitopen proxy w/key opts"
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start_client -F $OBJ/ssh_proxy
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \
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fail "match override permitopen"
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stop_client
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cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy
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echo "Match User NoSuchUser" >>$OBJ/sshd_proxy
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echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy
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# Test that a rule that doesn't match doesn't override, plus test a
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# PermitOpen entry that's not at the start of the list
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trace "nomatch permitopen proxy w/key opts"
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start_client -F $OBJ/ssh_proxy
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${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \
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fail "nomatch override permitopen"
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stop_client
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# Test parsing of available Match criteria (with the exception of Group which
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# requires knowledge of actual group memberships user running the test).
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params="user:user:u1 host:host:h1 address:addr:1.2.3.4 \
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localaddress:laddr:5.6.7.8 rdomain:rdomain:rdom1"
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cp $OBJ/sshd_proxy_bak $OBJ/sshd_config
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echo 'Banner /nomatch' >>$OBJ/sshd_config
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for i in $params; do
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config=`echo $i | cut -f1 -d:`
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criteria=`echo $i | cut -f2 -d:`
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value=`echo $i | cut -f3 -d:`
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cat >>$OBJ/sshd_config <<EOD
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Match $config $value
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Banner /$value
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EOD
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done
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${SUDO} ${SSHD} -f $OBJ/sshd_config -T >/dev/null || \
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fail "validate config for w/out spec"
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# Test matching each criteria.
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for i in $params; do
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testcriteria=`echo $i | cut -f2 -d:`
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expected=/`echo $i | cut -f3 -d:`
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spec=""
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for j in $params; do
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config=`echo $j | cut -f1 -d:`
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criteria=`echo $j | cut -f2 -d:`
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value=`echo $j | cut -f3 -d:`
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if [ "$criteria" = "$testcriteria" ]; then
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spec="$criteria=$value,$spec"
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else
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spec="$criteria=1$value,$spec"
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fi
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done
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trace "test spec $spec"
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result=`${SUDO} ${SSHD} -f $OBJ/sshd_config -T -C "$spec" | \
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awk '$1=="banner"{print $2}'`
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if [ "$result" != "$expected" ]; then
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fail "match $config expected $expected got $result"
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fi
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done
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