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|
#! /bin/bash
# postinst script for strongswan
#
# see: dh_installdeb(1)
set -e
# summary of how this script can be called:
# * <postinst> `configure' <most-recently-configured-version>
# * <old-postinst> `abort-upgrade' <new version>
# * <conflictor's-postinst> `abort-remove' `in-favour' <package>
# <new-version>
# * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
# <failed-install-package> <version> `removing'
# <conflicting-package> <version>
# for details, see /usr/share/doc/packaging-manual/
#
# quoting from the policy:
# Any necessary prompting should almost always be confined to the
# * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
# <failed-install-package> <version> `removing'
# <conflicting-package> <version>
# for details, see /usr/share/doc/packaging-manual/
#
# quoting from the policy:
# Any necessary prompting should almost always be confined to the
# post-installation script, and should be protected with a conditional
# so that unnecessary prompting doesn't happen if a package's
# installation fails and the `postinst' is called with `abort-upgrade',
# `abort-remove' or `abort-deconfigure'.
insert_private_key() {
cat <<EOF >> /etc/ipsec.secrets
: RSA {
$1
}
EOF
}
insert_private_key_filename() {
if ! grep -q ": RSA $1" /etc/ipsec.secrets; then
echo ": RSA $1" >> /etc/ipsec.secrets
fi
}
IPSEC_SECRETS_PATTERN_1=': RSA {'
IPSEC_SECRETS_PATTERN_2=' # yyy'
IPSEC_SECRETS_PATTERN_3=' }'
IPSEC_SECRETS_PATTERN_4='# do not change the indenting of that "}"'
# remove old, misguided attempts at a default ipsec.secrets files
repair_legacy_secrets() {
if grep -A 2 "$IPSEC_SECRETS_PATTERN_1" /etc/ipsec.secrets |
tail --lines=2 |
grep -A 1 "$IPSEC_SECRETS_PATTERN_2" |
tail --lines=1 |
grep "$IPSEC_SECRETS_PATTERN_3" >/dev/null; then
echo "Old default config file detected, removing the old defaults now."
umask 077 ; (
# this is ugly, and someone maybe can formulate this in sed, but
# this was the quickest way for me
line=`grep -n "$IPSEC_SECRETS_PATTERN_2" /etc/ipsec.secrets | cut -d':' -f1`
until=`expr $line - 1`
head -n $until /etc/ipsec.secrets
sum=`wc -l /etc/ipsec.secrets | cut -d ' ' -f1`
from=`expr $sum - $line -1`
tail -n $from /etc/ipsec.secrets
) > /etc/ipsec.secrets.tmp
mv /etc/ipsec.secrets.tmp /etc/ipsec.secrets
grep -v "$IPSEC_SECRETS_PATTERN_4" /etc/ipsec.secrets > /etc/ipsec.secrets.tmp
mv /etc/ipsec.secrets.tmp /etc/ipsec.secrets
fi
}
make_x509_cert() {
if [ $# -ne 12 ]; then
echo "Error in creating X.509 certificate"
exit 1
fi
case $5 in
false)
certreq=$4.req
selfsigned=""
;;
true)
certreq=$4
selfsigned="-x509"
;;
*)
echo "Error in creating X.509 certificate"
exit 1
;;
esac
echo -e "$6\n$7\n$8\n$9\n${10}\n${11}\n${12}\n\n\n" | \
/usr/bin/openssl req -new -outform PEM -out $certreq \
-newkey rsa:$1 -nodes -keyout $3 -keyform PEM \
-days $2 $selfsigned >/dev/null
}
. /usr/share/debconf/confmodule
case "$1" in
configure)
db_get strongswan/create_rsa_key
if [ "$RET" = "true" ]; then
repair_legacy_secrets
# OK, ipsec.secrets should now be correct
db_get strongswan/rsa_key_type
if [ "$RET" = "plain" ]; then
# a RSA keypair should be created - check if there is one already
if egrep -q ": RSA[:space:]*" /etc/ipsec.secrets; then
echo "Warning: there is already a RSA key in /etc/ipsec.secrets."
echo "Creating an additional one."
fi
# create a plain strongswan keypair
db_get strongswan/rsa_key_length
umask 077
keylength=$RET
privkey=`mktemp /tmp/ipsec-postinst.XXXXXX`
/usr/lib/ipsec/rsasigkey $keylength > $privkey
insert_private_key "`cat $privkey`"
rm $privkey
echo "Successfully created a plain strongSwan RSA keypair."
else
# extract the key from a (newly created) x509 certificate
host=`hostname`
newkeyfile="/etc/ipsec.d/private/${host}Key.pem"
newcertfile="/etc/ipsec.d/certs/${host}Cert.pem"
if [ -e $newcertfile -o -e $newkeyfile ]; then
echo "Error: $newcertfile or $newkeyfile already exists."
echo "Please remove them first an re-run dpkg-reconfigure to create a new keypair."
else
# create a new certificate
db_get strongswan/rsa_key_length
keylength=$RET
db_get strongswan/x509_self_signed
selfsigned=$RET
db_get strongswan/x509_country_code
countrycode=$RET
if [ -z "$countrycode" ]; then countrycode="."; fi
db_get strongswan/x509_state_name
statename=$RET
if [ -z "$statename" ]; then statename="."; fi
db_get strongswan/x509_locality_name
localityname=$RET
if [ -z "$localityname" ]; then localityname="."; fi
db_get strongswan/x509_organization_name
orgname=$RET
if [ -z "$orgname" ]; then orgname="."; fi
db_get strongswan/x509_organizational_unit
orgunit=$RET
if [ -z "$orgunit" ]; then orgunit="."; fi
db_get strongswan/x509_common_name
commonname=$RET
if [ -z "$commonname" ]; then commonname="."; fi
db_get strongswan/x509_email_address
email=$RET
if [ -z "$email" ]; then email="."; fi
make_x509_cert $keylength 1500 "$newkeyfile" "$newcertfile" "$selfsigned" "$countrycode" "$statename" "$localityname" "$orgname" "$orgunit" "$commonname" "$email"
chmod 0600 "$newkeyfile"
umask 077
insert_private_key_filename "$newkeyfile"
echo "Successfully created x509 certificate."
fi
fi
else
db_get strongswan/existing_x509_certificate
if [ "$RET" = "true" ]; then
if [ -e $newcertfile -o -e $newkeyfile ]; then
echo "Error: $newcertfile or $newkeyfile already exists."
echo "Please remove them first an re-run dpkg-reconfigure to create a new keypair."
else
# existing certificate - use it
db_get strongswan/existing_x509_certificate_filename
certfile=$RET
db_get strongswan/existing_x509_key_filename
keyfile=$RET
if [ ! -r $certfile ] || [ ! -r $keyfile ]; then
echo "Either the certificate or the key file could not be read !"
else
cp "$certfile" /etc/ipsec.d/certs
umask 077
cp "$keyfile" "/etc/ipsec.d/private"
newkeyfile="/etc/ipsec.d/private/`basename $keyfile`"
chmod 0600 "$newkeyfile"
insert_private_key_filename "$newkeyfile"
echo "Successfully extracted RSA key from existing x509 certificate."
fi
fi
fi
fi
# figure out the correct start time
db_get strongswan/start_level
if [ "$RET" = "earliest" ]; then
LEVELS="start 41 S . stop 34 0 6 ."
elif [ "$RET" = "after NFS" ]; then
LEVELS="start 15 2 3 4 5 . stop 30 0 1 6 ."
else
LEVELS="start 21 2 3 4 5 . stop 19 0 1 6 ."
fi
update-rc.d ipsec $LEVELS > /dev/null
db_get strongswan/enable-oe
if [ "$RET" != "true" ]; then
echo -n "Disabling opportunistic encryption (OE) in config file ... "
if egrep -q "include /etc/ipsec.d/examples/no_oe.conf$" /etc/ipsec.conf; then
# also update to new-style config
sed 's/.*include \/etc\/ipsec.d\/examples\/no_oe.conf/#include \/etc\/ipsec.d\/examples\/oe.conf/' < /etc/ipsec.conf > /etc/ipsec.conf.tmp
mv /etc/ipsec.conf.tmp /etc/ipsec.conf
echo -n "converted old config line to new format"
fi
if egrep -q "^include /etc/ipsec.d/examples/oe.conf$" /etc/ipsec.conf; then
sed 's/include \/etc\/ipsec.d\/examples\/oe.conf/#include \/etc\/ipsec.d\/examples\/oe.conf/' < /etc/ipsec.conf > /etc/ipsec.conf.tmp
mv /etc/ipsec.conf.tmp /etc/ipsec.conf
echo "done"
else
echo "already disabled"
fi
else
echo -n "Enabling opportunistic encryption (OE) in config file ... "
if egrep -q "include /etc/ipsec.d/examples/no_oe.conf$" /etc/ipsec.conf; then
# also update to new-style config
sed 's/.*include \/etc\/ipsec.d\/examples\/no_oe.conf/include \/etc\/ipsec.d\/examples\/oe.conf/' < /etc/ipsec.conf > /etc/ipsec.conf.tmp
mv /etc/ipsec.conf.tmp /etc/ipsec.conf
echo -n "converted old config line to new format"
fi
if egrep -q "^include /etc/ipsec.d/examples/oe.conf$" /etc/ipsec.conf; then
echo "already enabled"
elif egrep -q "^#.*include /etc/ipsec.d/examples/oe.conf$" /etc/ipsec.conf; then
sed 's/#.*include \/etc\/ipsec.d\/examples\/oe.conf/include \/etc\/ipsec.d\/examples\/oe.conf/' < /etc/ipsec.conf > /etc/ipsec.conf.tmp
mv /etc/ipsec.conf.tmp /etc/ipsec.conf
echo "done"
else
cat <<EOF >> /etc/ipsec.conf
#Enable Opportunistic Encryption
include /etc/ipsec.d/examples/oe.conf
EOF
echo "done"
fi
fi
if [ -z "$2" ]; then
# no old configured version - start strongswan now
invoke-rc.d ipsec start || true
else
# does the user wish strongswan to restart?
db_get strongswan/restart
if [ "$RET" = "true" ]; then
invoke-rc.d ipsec restart || true # sure, we'll restart it for you
fi
fi
db_stop
;;
abort-upgrade|abort-remove|abort-deconfigure)
;;
*)
echo "postinst called with unknown argument '$1'" >&2
exit 0
;;
esac
# dh_installdeb will replace this with shell code automatically
#DEBHELPER#
exit 0
|
