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#!/bin/sh
# 20181028
# Jan Mojzis
# Public domain.
# change directory to $AUTOPKGTEST_TMP
cd "${AUTOPKGTEST_TMP}"
# we need tools from /usr/sbin
PATH="/usr/sbin:${PATH}"
export PATH
# backup ~/.ssh
rm -rf ~/.ssh.tinysshtest.bk
[ -d ~/.ssh ] && mv ~/.ssh ~/.ssh.tinysshtest.bk
mkdir -p ~/.ssh
chmod 700 ~/.ssh
# run tinysshd on port 10000
rm -rf sshkeydir
tinysshd-makekey -q sshkeydir
tcpserver -HRDl0 127.0.0.1 10000 tinysshd -- sshkeydir 2>tinysshd.log &
tcpserverpid=$!
# Give some extra time for tcpserver to start,
# to avoid flaky test failures on slower testbeds
sleep 1
cleanup() {
ex=$?
#kill tcpserver
kill -TERM "${tcpserverpid}" 1>/dev/null 2>/dev/null || :
kill -KILL "${tcpserverpid}" 1>/dev/null 2>/dev/null || :
if [ ${ex} -gt 0 ]; then
(
echo "homedir:"
ls -ld ~ ~/.ssh
echo "tinysshd.log:"
cat tinysshd.log
) >&2
fi
rm -rf ~/.ssh sshkeydir tinysshd.log ssh.log
[ -d ~/.ssh.tinysshtest.bk ] && mv ~/.ssh.tinysshtest.bk ~/.ssh
exit "${ex}"
}
trap "cleanup" EXIT TERM INT
# create authorization keys
ssh-keygen -t ed25519 -q -N '' -f ~/.ssh/id_ed25519 || exit 10
# add server key to the known_hosts
ssh-keyscan -t ed25519 -H -p 10000 127.0.0.1 2>/dev/null > ~/.ssh/known_hosts
KEYTYPE=`cut -d ' ' -f1 < ~/.ssh/id_ed25519.pub`
KEY=`cut -d ' ' -f2 < ~/.ssh/id_ed25519.pub`
REST=`cut -d ' ' -f3- < ~/.ssh/id_ed25519.pub`
# Create ~/.ssh/authorized_keys with proper permissions/umask (LP: #2016597)
UMASK=$(umask)
umask 22
# now create malformed lines in authorization_keys
# login MUST FAIL
(
#extra space before key-type
echo " ${KEYTYPE} ${KEY} ${REST}"
#extra space after key-type
echo "${KEYTYPE} ${KEY} ${REST}"
#extra character before key-type
echo "a${KEYTYPE} ${KEY} ${REST}"
#extra character after key-type
echo "${KEYTYPE}a ${KEY} ${REST}"
#extra character before key
echo "${KEYTYPE} a${KEY} ${REST}"
#extra character after key
echo "${KEYTYPE} ${KEY}a ${REST}"
) > ~/.ssh/authorized_keys
(
echo "malformed authorization_keys:"
cat ~/.ssh/authorized_keys
echo
)
ssh -p 10000 127.0.0.1 'exit 0' >ssh.log 2>&1
exitcode=$?
if [ "${exitcode}" -eq 0 ]; then
echo "ssh 127.0.0.1:10000 login using malformed authorized_keys succeeded, too bad" >&2
cat ssh.log
exit 3
else
echo "ssh 127.0.0.1:10000 login using malformed authorized_keys failed, this is correct behavior"
fi
# now add correct line to authorized_keys
echo "${KEYTYPE} ${KEY}" >> ~/.ssh/authorized_keys
umask $UMASK # restore original umask
ssh -p 10000 127.0.0.1 'exit 0'
exitcode=$?
if [ ! "${exitcode}" -eq 0 ]; then
echo "ssh 127.0.0.1:10000 login using correct authorized_keys failed, too bad" >&2
exit 4
else
echo "ssh 127.0.0.1:10000 login using correct authorized_keys succeeded, this is correct behavior"
fi
exit 0
|
