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|
#!/bin/sh -
# $Id$
#
# Create a chroot jail for rcynic.
#
# This is approximately what a pkg-install script might do if this were
# a FreeBSD port. Perhaps some day it will be.
: ${jaildir="${DESTDIR}/var/rcynic"}
: ${jailuser="rcynic"}
: ${jailgroup="rcynic"}
: ${jailname="RPKI Validation System"}
: ${setupcron="NO"}
echo "Setting up \"${jaildir}\" as a chroot jail for rcynic."
if /usr/bin/dscl . -read "/Groups/${jailgroup}" >/dev/null 2>&1
then
echo "You already have a group \"${jailgroup}\", so I will use it."
elif gid="$(/usr/bin/dscl . -list /Groups PrimaryGroupID | /usr/bin/awk 'BEGIN {gid = 501} $2 >= gid {gid = 1 + $2} END {print gid}')" &&
/usr/bin/dscl . -create "/Groups/${jailgroup}" &&
/usr/bin/dscl . -create "/Groups/${jailgroup}" RealName "${jailname}" &&
/usr/bin/dscl . -create "/Groups/${jailgroup}" PrimaryGroupID "$gid" &&
/usr/bin/dscl . -create "/Groups/${jailgroup}" GeneratedUID "$(/usr/bin/uuidgen)" &&
/usr/bin/dscl . -create "/Groups/${jailgroup}" Password "*"
then
echo "Added group \"${jailgroup}\"."
else
echo "Adding group \"${jailgroup}\" failed..."
echo "Please create it, then try again."
exit 1
fi
if /usr/bin/dscl . -read "/Users/${jailuser}" >/dev/null 2>&1
then
echo "You already have a user \"${jailuser}\", so I will use it."
elif uid="$(/usr/bin/dscl . -list /Users UniqueID | /usr/bin/awk 'BEGIN {uid = 501} $2 >= uid {uid = 1 + $2} END {print uid}')" &&
/usr/bin/dscl . -create "/Users/${jailuser}" &&
/usr/bin/dscl . -create "/Users/${jailuser}" UserShell "/usr/bin/false" &&
/usr/bin/dscl . -create "/Users/${jailuser}" RealName "${jailname}" &&
/usr/bin/dscl . -create "/Users/${jailuser}" UniqueID "$uid" &&
/usr/bin/dscl . -create "/Users/${jailuser}" PrimaryGroupID "$gid" &&
/usr/bin/dscl . -create "/Users/${jailuser}" NFSHomeDirectory "/var/empty" &&
/usr/bin/dscl . -create "/Users/${jailuser}" GeneratedUID "$(/usr/bin/uuidgen)" &&
/usr/bin/dscl . -create "/Users/${jailuser}" Password "*"
then
echo "Added user \"${jailuser}\"."
else
echo "Adding user \"${jailuser}\" failed..."
echo "Please create it, then try again."
exit 1
fi
if ! /bin/test -d "${jaildir}"; then
/bin/mkdir "${jaildir}"
fi
if /usr/bin/install -o root -g wheel -d ${DESTDIR}/Library/StartupItems/RCynic &&
/usr/bin/install -o root -g wheel -m 555 RCynic/RCynic RCynic/StartupParameters.plist ${DESTDIR}/Library/StartupItems/RCynic; then
echo "Installed ${DESTDIR}/Library/StartupItems/RCynic"
else
echo "Installing ${DESTDIR}/Library/StartupItems/RCynic failed"
exit 1
fi
echo "Running ${DESTDIR}/Library/StartupItems/RCynic/RCynic to set up directories"
if ! rcynic_jaildir="$jaildir" rcynic_user="$jailuser" rcynic_group="$jailgroup" /Library/StartupItems/RCynic/RCynic start; then
echo "Directory setup failed"
exit 1
fi
if /bin/test -r "$jaildir/etc/rcynic.conf"; then
echo "You already have config file \"${jaildir}/etc/rcynic.conf\", so I will use it."
elif /usr/bin/install -m 444 -o root -g wheel -p ../sample-rcynic.conf "${jaildir}/etc/rcynic.conf"; then
echo "Installed minimal ${jaildir}/etc/rcynic.conf, adding SAMPLE trust anchors"
for i in ../../sample-trust-anchors/*.tal; do
j="$jaildir/etc/trust-anchors/${i##*/}"
/bin/test -r "$i" || continue
/bin/test -r "$j" && continue
echo "Installing $i as $j"
/usr/bin/install -m 444 -o root -g wheel -p "$i" "$j"
done
j=1
for i in $jaildir/etc/trust-anchors/*.tal; do
echo >>"${jaildir}/etc/rcynic.conf" "trust-anchor-locator.$j = /etc/trust-anchors/${i##*/}"
j=$((j+1))
done
else
echo "Installing minimal ${jaildir}/etc/rcynic.conf failed"
exit 1
fi
echo "Installing rcynic as ${jaildir}/bin/rcynic"
/usr/bin/install -m 555 -o root -g wheel -p ../../rcynic "${jaildir}/bin/rcynic"
if /bin/test -x "$jaildir/bin/rsync"; then
echo "You already have an executable \"$jaildir/bin/rsync\", so I will use it"
elif /usr/bin/install -m 555 -o root -g wheel -p /usr/bin/rsync "${jaildir}/bin/rsync"; then
echo "Installed ${jaildir}/bin/rsync"
else
echo "Installing ${jaildir}/bin/rsync failed"
exit 1
fi
echo "Copying required shared libraries"
shared_libraries="${jaildir}/bin/rcynic ${jaildir}/bin/rsync"
while true
do
closure="$(/usr/bin/otool -L ${shared_libraries} | /usr/bin/awk '/:$/ {next} {print $1}' | /usr/bin/sort -u)"
if test "x$shared_libraries" = "x$closure"
then
break
else
shared_libraries="$closure"
fi
done
for shared in /usr/lib/dyld $shared_libraries
do
if /bin/test -r "${jaildir}/${shared}"
then
echo "You already have a \"${jaildir}/${shared}\", so I will use it"
elif /usr/bin/install -m 555 -o root -g wheel -p "${shared}" "${jaildir}/${shared}"
then
echo "Copied ${shared} into ${jaildir}"
else
echo "Unable to copy ${shared} into ${jaildir}"
exit 1
fi
done
if /usr/bin/install -m 555 -o root -g wheel -p ../../rcynic-html "${jaildir}/bin/rcynic-html"; then
echo "Installed rcynic.py as \"${jaildir}/bin/rcynic-html\""
else
echo "Installing rcynic-html failed"
exit 1
fi
echo "Setting up root's crontab to run jailed rcynic"
case "$setupcron" in
YES|yes)
/usr/bin/crontab -l -u root 2>/dev/null |
/usr/bin/awk -v "jailuser=$jailuser" -v "jailgroup=$jailgroup" -v "jaildir=$jaildir" '
BEGIN {
cmd = "exec /usr/sbin/chroot -u " jailuser " -g " jailgroup " " jaildir;
cmd = cmd " /bin/rcynic -c /etc/rcynic.conf";
}
$0 !~ cmd {
print;
}
END {
"/usr/bin/hexdump -n 2 -e \"\\\"%u\\\\\\n\\\"\" /dev/random" | getline;
printf "%u * * * *\t%s\n", $1 % 60, cmd;
}' |
/usr/bin/crontab -u root -
/bin/cat <<EOF
crontab is set up to run rcynic hourly, at a randomly selected
minute (to spread load on the rsync servers). Please do NOT
adjust this to run on the hour. In particular please do NOT
adjust this to run at midnight UTC.
EOF
;;
*)
/bin/cat <<EOF
You'll need to add a crontab entry running the following command as root:
/usr/sbin/chroot -u $jailuser -g $jailgroup $jaildir /bin/rcynic -c /etc/rcynic.conf
Please try to pick a random time for this, don't just run it on the hour,
or at local midnight, or, worst of all, at midnight UTC.
EOF
;;
esac
/bin/cat <<EOF
Jail set up. You may need to customize $jaildir/etc/rcynic.conf.
If you did not install your own trust anchors, a default set
of SAMPLE trust anchors may have been installed for you, but
you, the relying party, are the only one who can decide
whether you trust those anchors. rcynic will not do anything
useful without good trust anchors.
EOF
|
