1# $OpenBSD: cfgmatch.sh,v 1.11 2017/10/04 18:50:23 djm Exp $ 2# Placed in the Public Domain. 3 4tid="sshd_config match" 5 6pidfile=$OBJ/remote_pid 7fwdport=3301 8fwd="-L $fwdport:127.0.0.1:$PORT" 9 10echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_config 11echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_proxy 12 13start_client() 14{ 15 rm -f $pidfile 16 ${SSH} -q $fwd "$@" somehost \ 17 exec sh -c \'"echo \$\$ > $pidfile; exec sleep 100"\' \ 18 >>$TEST_REGRESS_LOGFILE 2>&1 & 19 client_pid=$! 20 # Wait for remote end 21 n=0 22 while test ! -f $pidfile ; do 23 sleep 1 24 n=`expr $n + 1` 25 if test $n -gt 60; then 26 kill $client_pid 27 fatal "timeout waiting for background ssh" 28 fi 29 done 30} 31 32stop_client() 33{ 34 pid=`cat $pidfile` 35 if [ ! -z "$pid" ]; then 36 kill $pid 37 fi 38 wait 39} 40 41cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak 42echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_config 43echo "Match Address 127.0.0.1" >>$OBJ/sshd_config 44echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_config 45 46grep -v AuthorizedKeysFile $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy 47echo "AuthorizedKeysFile /dev/null" >>$OBJ/sshd_proxy 48echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_proxy 49echo "Match user $USER" >>$OBJ/sshd_proxy 50echo "AuthorizedKeysFile /dev/null $OBJ/authorized_keys_%u" >>$OBJ/sshd_proxy 51echo "Match Address 127.0.0.1" >>$OBJ/sshd_proxy 52echo "PermitOpen 127.0.0.1:2 127.0.0.1:3 127.0.0.1:$PORT" >>$OBJ/sshd_proxy 53 54start_sshd 55 56#set -x 57 58# Test Match + PermitOpen in sshd_config. This should be permitted 59trace "match permitopen localhost" 60start_client -F $OBJ/ssh_config 61${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \ 62 fail "match permitopen permit" 63stop_client 64 65# Same but from different source. This should not be permitted 66trace "match permitopen proxy" 67start_client -F $OBJ/ssh_proxy 68${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \ 69 fail "match permitopen deny" 70stop_client 71 72# Retry previous with key option, should also be denied. 73cp /dev/null $OBJ/authorized_keys_$USER 74for t in ${SSH_KEYTYPES}; do 75 printf 'permitopen="127.0.0.1:'$PORT'" ' >> $OBJ/authorized_keys_$USER 76 cat $OBJ/$t.pub >> $OBJ/authorized_keys_$USER 77done 78trace "match permitopen proxy w/key opts" 79start_client -F $OBJ/ssh_proxy 80${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \ 81 fail "match permitopen deny w/key opt" 82stop_client 83 84# Test both sshd_config and key options permitting the same dst/port pair. 85# Should be permitted. 86trace "match permitopen localhost" 87start_client -F $OBJ/ssh_config 88${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \ 89 fail "match permitopen permit" 90stop_client 91 92cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy 93echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy 94echo "Match User $USER" >>$OBJ/sshd_proxy 95echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy 96 97# Test that a Match overrides a PermitOpen in the global section 98trace "match permitopen proxy w/key opts" 99start_client -F $OBJ/ssh_proxy 100${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true && \ 101 fail "match override permitopen" 102stop_client 103 104cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy 105echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy 106echo "Match User NoSuchUser" >>$OBJ/sshd_proxy 107echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy 108 109# Test that a rule that doesn't match doesn't override, plus test a 110# PermitOpen entry that's not at the start of the list 111trace "nomatch permitopen proxy w/key opts" 112start_client -F $OBJ/ssh_proxy 113${SSH} -q -p $fwdport -F $OBJ/ssh_config somehost true || \ 114 fail "nomatch override permitopen" 115stop_client 116