# $OpenBSD: key-options.sh,v 1.10 2024/03/25 02:07:08 dtucker Exp $ # Placed in the Public Domain. tid="key options" origkeys="$OBJ/authkeys_orig" authkeys="$OBJ/authorized_keys_${USER}" cp $authkeys $origkeys # Allocating ptys can require privileges on some platforms. skip_pty="" if ! config_defined HAVE_OPENPTY && [ "x$SUDO" = "x" ]; then skip_pty="no openpty(3) and SUDO not set" fi # Test command= forced command for c in 'command="echo bar"' 'no-pty,command="echo bar"'; do sed "s/.*/$c &/" $origkeys >$authkeys verbose "key option $c" r=`${SSH} -q -F $OBJ/ssh_proxy somehost echo foo` if [ "$r" = "foo" ]; then fail "key option forced command not restricted" fi if [ "$r" != "bar" ]; then fail "key option forced command not executed" fi done # Test no-pty expect_pty_succeed() { which=$1 opts=$2 rm -f $OBJ/data sed "s/.*/$opts &/" $origkeys >$authkeys verbose "key option pty $which" [ "x$skip_pty" != "x" ] && verbose "skipped because $skip_pty" && return ${SSH} -ttq -F $OBJ/ssh_proxy somehost "tty > $OBJ/data; exit 0" if [ $? -ne 0 ] ; then fail "key option failed $which" else r=`cat $OBJ/data` case "$r" in /dev/*) ;; *) fail "key option failed $which (pty $r)" ;; esac fi } expect_pty_fail() { which=$1 opts=$2 rm -f $OBJ/data sed "s/.*/$opts &/" $origkeys >$authkeys verbose "key option pty $which" [ "x$skip_pty" != "x" ] && verbose "skipped because $skip_pty" && return ${SSH} -ttq -F $OBJ/ssh_proxy somehost "tty > $OBJ/data; exit 0" if [ $? -eq 0 ]; then r=`cat $OBJ/data` if [ -e "$r" ]; then fail "key option failed $which (pty $r)" fi case "$r" in /dev/*) fail "key option failed $which (pty $r)" ;; *) ;; esac fi } # First ensure that we can allocate a pty by default. expect_pty_succeed "default" "" expect_pty_fail "no-pty" "no-pty" expect_pty_fail "restrict" "restrict" expect_pty_succeed "restrict,pty" "restrict,pty" # Test environment= # XXX this can fail if ~/.ssh/environment exists for the user running the test echo 'PermitUserEnvironment yes' >> $OBJ/sshd_proxy sed 's/.*/environment="FOO=bar" &/' $origkeys >$authkeys verbose "key option environment" r=`${SSH} -q -F $OBJ/ssh_proxy somehost 'echo $FOO'` if [ "$r" != "bar" ]; then fail "key option environment not set" fi # Test from= restriction start_sshd for f in 127.0.0.1 '127.0.0.0\/8'; do cat $origkeys >$authkeys ${SSH} -q -F $OBJ/ssh_proxy somehost true if [ $? -ne 0 ]; then fail "key option failed without restriction" fi sed 's/.*/from="'"$f"'" &/' $origkeys >$authkeys from=`head -1 $authkeys | cut -f1 -d ' '` verbose "key option $from" r=`${SSH} -q -F $OBJ/ssh_proxy somehost 'echo true'` if [ "$r" = "true" ]; then fail "key option $from not restricted" fi r=`${SSH} -q -F $OBJ/ssh_config somehost 'echo true'` if [ "$r" != "true" ]; then fail "key option $from not allowed but should be" fi done check_valid_before() { which=$1 opts=$2 expect=$3 sed "s/.*/$opts &/" $origkeys >$authkeys verbose "key option expiry-time $which" ${SSH} -q -F $OBJ/ssh_proxy somehost true r=$? case "$expect" in fail) test $r -eq 0 && fail "key option succeeded $which" ;; pass) test $r -ne 0 && fail "key option failed $which" ;; *) fatal "unknown expectation $expect" ;; esac } check_valid_before "default" "" "pass" check_valid_before "invalid" 'expiry-time="INVALID"' "fail" check_valid_before "expired" 'expiry-time="19990101"' "fail" check_valid_before "valid" 'expiry-time="20380101"' "pass"