/mandos/trunk

#!/bin/sh

# This script will be run by 'mkinitramfs' when it creates the image.

# Its job is to decide which files to install, then install them into

# the staging area, where the initramfs is being created.  This

# happens when a new 'linux-image' package is installed, or when the

# administrator runs 'update-initramfs' by hand to update an initramfs

# image.

# The environment contains at least:

#

#  DESTDIR -- The staging directory where the image is being built.

# No initramfs pre-requirements

PREREQ="cryptroot"

prereqs()

{

	echo "$PREREQ"

}

case $1 in

# get pre-requisites

prereqs)

	prereqs

	exit 0

	;;

esac

. /usr/share/initramfs-tools/hook-functions

for d in /usr /usr/local; do

    if [ -d "$d"/lib/mandos ]; then

	prefix="$d"

	break

    fi

done

if [ -z "$prefix" ]; then

    # Mandos not found

    exit 1

fi

for d in /etc/keys/mandos /etc/mandos/keys; do

    if [ -d "$d" ]; then

	keydir="$d"

	break

    fi

done

if [ -z "$keydir" ]; then

    # Mandos key directory not found

    exit 1

fi

set `{ getent passwd _mandos \

    || getent passwd nobody \

    || echo ::65534:65534:::; } \

    | cut --delimiter=: --fields=3,4 --only-delimited \

    --output-delimiter=" "`

mandos_user="$1"

mandos_group="$2"

# The Mandos network client uses the network

auto_add_modules net

# The Mandos network client uses IPv6

force_load ipv6

# These are directories inside the initrd

CONFDIR="/conf/conf.d/mandos"

MANDOSDIR="/lib/mandos"

PLUGINDIR="${MANDOSDIR}/plugins.d"

HOOKDIR="${MANDOSDIR}/network-hooks.d"

# Make directories

install --directory --mode=u=rwx,go=rx "${DESTDIR}${CONFDIR}" \

	"${DESTDIR}${MANDOSDIR}" "${DESTDIR}${HOOKDIR}"

install --owner=${mandos_user} --group=${mandos_group} --directory \

    --mode=u=rwx "${DESTDIR}${PLUGINDIR}"

# Copy the Mandos plugin runner

copy_exec "$prefix"/lib/mandos/plugin-runner "${MANDOSDIR}"

# Copy the plugins

# Copy the packaged plugins

for file in "$prefix"/lib/mandos/plugins.d/*; do

    base="`basename \"$file\"`"

    # Is this plugin overridden?

    if [ -e "/etc/mandos/plugins.d/$base" ]; then

	continue

    fi

    case "$base" in

	*~|.*|\#*\#|*.dpkg-old|*.dpkg-bak|*.dpkg-new|*.dpkg-divert)

	    : ;;

	"*") echo "W: Mandos client plugin directory is empty." >&2 ;;

	*) copy_exec "$file" "${PLUGINDIR}" ;;

    esac

done

# Copy any user-supplied plugins

for file in /etc/mandos/plugins.d/*; do

    base="`basename \"$file\"`"

    case "$base" in

	*~|.*|\#*\#|*.dpkg-old|*.dpkg-bak|*.dpkg-new|*.dpkg-divert)

	    : ;;

	"*") : ;;

	*) copy_exec "$file" "${PLUGINDIR}" ;;

    esac

done

# Get DEVICE from initramfs.conf and other files

. /etc/initramfs-tools/initramfs.conf

for conf in /etc/initramfs-tools/conf.d/*; do

    if [ -n `basename \"$conf\" | grep '^[[:alnum:]][[:alnum:]\._-]*$' \

	| grep -v '\.dpkg-.*$'` ]; then

	[ -f ${conf} ] && . ${conf}

    fi

done

export DEVICE

# Copy network hooks

for hook in /etc/mandos/network-hooks.d/*; do

    case "`basename \"$hook\"`" in

	"*") continue ;;

	*[!A-Za-z0-9_.-]*) continue ;;

	*) test -d "$hook" || copy_exec "$hook" "${HOOKDIR}" ;;

    esac

    if [ -x "$hook" ]; then

        # Copy any files needed by the network hook

	MANDOSNETHOOKDIR=/etc/mandos/network-hooks.d MODE=files \

	    VERBOSITY=0 "$hook" files | while read file target; do

	    if [ ! -e "${file}" ]; then

		echo "WARNING: file ${file} not found, requested by Mandos network hook '${hook##*/}'" >&2

	    fi

	    if [ -z "${target}" ]; then

		copy_exec "$file"

	    else

		copy_exec "$file" "$target"

	    fi

	done

        # Copy and load any modules needed by the network hook

	MANDOSNETHOOKDIR=/etc/mandos/network-hooks.d MODE=modules \

	    VERBOSITY=0 "$hook" modules | while read module; do

	    if [ -z "${target}" ]; then

		force_load "$module"

	    fi

	done

    fi

done

# GPGME needs /usr/bin/gpg

if [ ! -e "${DESTDIR}/usr/bin/gpg" \

    -a -n "`ls \"${DESTDIR}\"/usr/lib/libgpgme.so* \

		2>/dev/null`" ]; then

    copy_exec /usr/bin/gpg

fi

# Config files

for file in /etc/mandos/plugin-runner.conf; do

    if [ -d "$file" ]; then

	continue

    fi

    cp --archive --sparse=always "$file" "${DESTDIR}${CONFDIR}"

done

if [ ${mandos_user} != 65534 ]; then

    sed --in-place --expression="1i--userid=${mandos_user}" \

	"${DESTDIR}${CONFDIR}/plugin-runner.conf"

fi

if [ ${mandos_group} != 65534 ]; then

    sed --in-place --expression="1i--groupid=${mandos_group}" \

	"${DESTDIR}${CONFDIR}/plugin-runner.conf"

fi

# Key files

for file in "$keydir"/*; do

    if [ -d "$file" ]; then

	continue

    fi

    cp --archive --sparse=always "$file" "${DESTDIR}${CONFDIR}"

    chown ${mandos_user}:${mandos_group} \

	"${DESTDIR}${CONFDIR}/`basename \"$file\"`"

done

# /lib/mandos/plugin-runner will drop priviliges, but needs access to

# its plugin directory and its config file.  However, since almost all

# files in initrd have been created with umask 027, this opening of

# permissions is needed.

# 

# (The umask is not really intended to affect the files inside the

# initrd; it is intended to affect the initrd.img file itself, since

# it now contains secret key files.  There is, however, no other way

# to set the permission of the initrd.img file without a race

# condition.  This umask is set by "initramfs-tools-hook-conf",

# installed as "/usr/share/initramfs-tools/conf-hooks.d/mandos".)

# 

for full in "${MANDOSDIR}" "${CONFDIR}"; do

    while [ "$full" != "/" ]; do

	chmod a+rX "${DESTDIR}$full"

	full="`dirname \"$full\"`"

    done

done

# Reset some other things to sane permissions which we have

# inadvertently affected with our umask setting.

for dir in / /bin /etc /keyscripts /sbin /scripts /usr /usr/bin; do

    if [ -d "${DESTDIR}$dir" ]; then

	chmod a+rX "${DESTDIR}$dir"

    fi

done

for dir in "${DESTDIR}"/lib* "${DESTDIR}"/usr/lib*; do

    if [ -d "$dir" ]; then

	find "$dir" \! -perm -u+rw,g+r -prune -or -print0 \

	    | xargs --null --no-run-if-empty chmod a+rX

    fi

done