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Diffstat (limited to 'regress/cfgmatch.sh')
| -rw-r--r-- | regress/cfgmatch.sh | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/regress/cfgmatch.sh b/regress/cfgmatch.sh new file mode 100644 index 0000000..05a6668 --- /dev/null +++ b/regress/cfgmatch.sh @@ -0,0 +1,158 @@ +# $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 |