1 # $OpenBSD: cfgmatch.sh,v 1.6 2011/06/03 05:35:10 dtucker Exp $ 2 # Placed in the Public Domain. 3 4 tid="sshd_config match" 5 6 pidfile=$OBJ/remote_pid 7 fwdport=3301 8 fwd="-L $fwdport:127.0.0.1:$PORT" 9 10 echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_config 11 echo "ExitOnForwardFailure=yes" >> $OBJ/ssh_proxy 12 13 start_client() 14 { 15 rm -f $pidfile 16 ${SSH} -q -$p $fwd "$@" somehost \ 17 exec sh -c \'"echo \$\$ > $pidfile; exec sleep 100"\' \ 18 >>$TEST_SSH_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 32 stop_client() 33 { 34 pid=`cat $pidfile` 35 if [ ! -z "$pid" ]; then 36 kill $pid 37 sleep 1 38 fi 39 wait 40 } 41 42 cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak 43 grep -v AuthorizedKeysFile $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy 44 echo "AuthorizedKeysFile /dev/null" >>$OBJ/sshd_proxy 45 echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_config 46 echo "Match user $USER" >>$OBJ/sshd_proxy 47 echo "AuthorizedKeysFile /dev/null $OBJ/authorized_keys_%u" >>$OBJ/sshd_proxy 48 echo "Match Address 127.0.0.1" >>$OBJ/sshd_config 49 echo "PermitOpen 127.0.0.1:$PORT" >>$OBJ/sshd_config 50 51 echo "PermitOpen 127.0.0.1:1" >>$OBJ/sshd_proxy 52 echo "Match Address 127.0.0.1" >>$OBJ/sshd_proxy 53 echo "PermitOpen 127.0.0.1:$PORT" >>$OBJ/sshd_proxy 54 55 start_sshd 56 57 #set -x 58 59 # Test Match + PermitOpen in sshd_config. This should be permitted 60 for p in 1 2; do 61 trace "match permitopen localhost proto $p" 62 start_client -F $OBJ/ssh_config 63 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true || \ 64 fail "match permitopen permit proto $p" 65 stop_client 66 done 67 68 # Same but from different source. This should not be permitted 69 for p in 1 2; do 70 trace "match permitopen proxy proto $p" 71 start_client -F $OBJ/ssh_proxy 72 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true && \ 73 fail "match permitopen deny proto $p" 74 stop_client 75 done 76 77 # Retry previous with key option, should also be denied. 78 echon 'permitopen="127.0.0.1:'$PORT'" ' >$OBJ/authorized_keys_$USER 79 cat $OBJ/rsa.pub >> $OBJ/authorized_keys_$USER 80 echon 'permitopen="127.0.0.1:'$PORT'" ' >>$OBJ/authorized_keys_$USER 81 cat $OBJ/rsa1.pub >> $OBJ/authorized_keys_$USER 82 for p in 1 2; do 83 trace "match permitopen proxy w/key opts proto $p" 84 start_client -F $OBJ/ssh_proxy 85 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true && \ 86 fail "match permitopen deny w/key opt proto $p" 87 stop_client 88 done 89 90 # Test both sshd_config and key options permitting the same dst/port pair. 91 # Should be permitted. 92 for p in 1 2; do 93 trace "match permitopen localhost proto $p" 94 start_client -F $OBJ/ssh_config 95 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true || \ 96 fail "match permitopen permit proto $p" 97 stop_client 98 done 99 100 cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy 101 echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy 102 echo "Match User $USER" >>$OBJ/sshd_proxy 103 echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy 104 105 # Test that a Match overrides a PermitOpen in the global section 106 for p in 1 2; do 107 trace "match permitopen proxy w/key opts proto $p" 108 start_client -F $OBJ/ssh_proxy 109 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true && \ 110 fail "match override permitopen proto $p" 111 stop_client 112 done 113 114 cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy 115 echo "PermitOpen 127.0.0.1:1 127.0.0.1:$PORT 127.0.0.2:2" >>$OBJ/sshd_proxy 116 echo "Match User NoSuchUser" >>$OBJ/sshd_proxy 117 echo "PermitOpen 127.0.0.1:1 127.0.0.1:2" >>$OBJ/sshd_proxy 118 119 # Test that a rule that doesn't match doesn't override, plus test a 120 # PermitOpen entry that's not at the start of the list 121 for p in 1 2; do 122 trace "nomatch permitopen proxy w/key opts proto $p" 123 start_client -F $OBJ/ssh_proxy 124 ${SSH} -q -$p -p $fwdport -F $OBJ/ssh_config somehost true || \ 125 fail "nomatch override permitopen proto $p" 126 stop_client 127 done 128
