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#!/bin/sh
# This script can be called in the following ways:
#
# After the package was installed:
# <postinst> configure <old-version>
#
#
# If prerm fails during upgrade or fails on failed upgrade:
# <old-postinst> abort-upgrade <new-version>
#
# If prerm fails during deconfiguration of a package:
# <postinst> abort-deconfigure in-favour <new-package> <version>
# removing <old-package> <version>
#
# If prerm fails during replacement due to conflict:
# <postinst> abort-remove in-favour <new-package> <version>
set -e
# Update the initial RAM file system image
update_initramfs()
{
update-initramfs -u -k all
if dpkg --compare-versions "$2" lt-nl "1.0.10-1"; then
# Make old initrd.img files unreadable too, in case they were
# created with mandos-client 1.0.8 or older.
find /boot -maxdepth 1 -type f -name "initrd.img-*.bak" \
-print0 | xargs --null --no-run-if-empty chmod o-r
fi
}
# Add user and group
add_mandos_user(){
# Rename old "mandos" user and group
if dpkg --compare-versions "$2" lt "1.0.3-1"; then
case "`getent passwd mandos`" in
*:Mandos\ password\ system,,,:/nonexistent:/bin/false)
usermod --login _mandos mandos
groupmod --new-name _mandos mandos
return
;;
esac
fi
# Create new user and group
if ! getent passwd _mandos >/dev/null; then
adduser --system --force-badname --quiet --home /nonexistent \
--no-create-home --group --disabled-password \
--gecos "Mandos password system" _mandos
fi
}
# Create client key pairs
create_keys(){
# If the OpenPGP key files do not exist, generate all keys using
# mandos-keygen
if ! [ -r /etc/keys/mandos/pubkey.txt \
-a -r /etc/keys/mandos/seckey.txt ]; then
mandos-keygen
gpg-connect-agent KILLAGENT /bye || :
return 0
fi
# If the TLS keys already exists, do nothing
if [ -r /etc/keys/mandos/tls-privkey.pem \
-a -r /etc/keys/mandos/tls-pubkey.pem ]; then
return 0
fi
# If this is an upgrade from an old installation, the TLS keys
# will not exist; create them.
# First try certtool from GnuTLS
if ! certtool --generate-privkey --password='' \
--outfile /etc/keys/mandos/tls-privkey.pem \
--sec-param ultra --key-type=ed25519 --pkcs8 --no-text \
2>/dev/null; then
# Otherwise try OpenSSL
if ! openssl genpkey -algorithm X25519 \
-out /etc/keys/mandos/tls-privkey.pem; then
rm --force /etc/keys/mandos/tls-privkey.pem
# None of the commands succeded; give up
return 1
fi
fi
local umask=$(umask)
umask 077
# First try certtool from GnuTLS
if ! certtool --password='' \
--load-privkey=/etc/keys/mandos/tls-privkey.pem \
--outfile=/etc/keys/mandos/tls-pubkey.pem --pubkey-info \
--no-text 2>/dev/null; then
# Otherwise try OpenSSL
if ! openssl pkey -in /etc/keys/mandos/tls-privkey.pem \
-out /etc/keys/mandos/tls-pubkey.pem -pubout; then
rm --force /etc/keys/mandos/tls-pubkey.pem
# None of the commands succeded; give up
umask $umask
return 1
fi
fi
umask $umask
}
create_dh_params(){
if [ -r /etc/keys/mandos/dhparams.pem ]; then
return 0
fi
# Create a Diffe-Hellman parameters file
DHFILE="`mktemp -t mandos-client-dh-parameters.XXXXXXXXXX.pem`"
# First try certtool from GnuTLS
if ! certtool --generate-dh-params --sec-param high \
--outfile "$DHFILE"; then
# Otherwise try OpenSSL
if ! openssl genpkey -genparam -algorithm DH -out "$DHFILE" \
-pkeyopt dh_paramgen_prime_len:3072; then
# None of the commands succeded; give up
rm -- "$DHFILE"
return 1
fi
fi
sed --in-place --expression='0,/^-----BEGIN DH PARAMETERS-----$/d' \
"$DHFILE"
sed --in-place --expression='1i-----BEGIN DH PARAMETERS-----' \
"$DHFILE"
cp --archive "$DHFILE" /etc/keys/mandos/dhparams.pem
rm -- "$DHFILE"
}
case "$1" in
configure)
add_mandos_user "$@"
create_keys "$@"
create_dh_params "$@" || :
update_initramfs "$@"
if dpkg --compare-versions "$2" lt-nl "1.7.10-1"; then
PLUGINHELPERDIR=/usr/lib/$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null)/mandos/plugin-helpers
if ! dpkg-statoverride --list "$PLUGINHELPERDIR" \
>/dev/null 2>&1; then
chmod u=rwx,go= -- "$PLUGINHELPERDIR"
fi
if ! dpkg-statoverride --list /etc/mandos/plugin-helpers \
>/dev/null 2>&1; then
chmod u=rwx,go= -- /etc/mandos/plugin-helpers
fi
fi
;;
abort-upgrade|abort-deconfigure|abort-remove)
;;
*)
echo "$0 called with unknown argument '$1'" 1>&2
exit 1
;;
esac
#DEBHELPER#
exit 0
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