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# $OpenBSD: key-options.sh,v 1.9 2018/07/03 13:53:26 djm 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"
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