#!/bin/sh

PREREQ=""

prereqs()
{
	echo "$PREREQ"
}

case $1 in
prereqs)
	prereqs
	exit 0
	;;
esac

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

add_crypto_modules() {
	local mod file altmod found genericfound
	mod="$1"
	found=""
	genericfound=""

	if [ -z "$mod" ]; then
		return 1
	fi

	# We have several potential sources of modules (in order of preference):
	#
	#   a) /lib/modules/$VERSION/kernel/arch/$ARCH/crypto/$mod-$specific.ko
	#   b) /lib/modules/$VERSION/kernel/crypto/$mod_generic.ko
	#   c) /lib/modules/$VERSION/kernel/crypto/$mod.ko
	#
	# and (currently ignored):
	#
	#   d) /lib/modules/$VERSION/kernel/drivers/crypto/$specific-$mod.ko

	for file in $(find "$MODULESDIR/kernel/arch/" -name "$mod-*.ko" 2>/dev/null); do
		altmod="${file##*/}"
		altmod="${altmod%.ko}"
		manual_add_modules "$altmod"
		found="yes"
	done

	for file in $(find "$MODULESDIR/kernel/crypto/" -name "${mod}_generic.ko" 2>/dev/null); do
		altmod="${file##*/}"
		altmod="${altmod%.ko}"
		manual_add_modules "$altmod"
		found="yes"
		genericfound="yes"
	done

	if [ -z "$genericfound" ]; then
		for file in $(find "$MODULESDIR/kernel/crypto/" -name "${mod}.ko" 2>/dev/null); do
			altmod="${file##*/}"
			altmod="${altmod%.ko}"
			manual_add_modules "$altmod"
			found="yes"
		done
	fi

	if [ -z "$found" ]; then
		return 1
	fi

	return 0
}

for mod in aes cbc chainiv cryptomgr krng sha256 xts; do
	add_crypto_modules $mod
done

for mod in dm_mod dm_crypt; do
	manual_add_modules $mod
done

copy_exec /sbin/cryptsetup
copy_exec /sbin/dmsetup
copy_exec /lib/cryptsetup/askpass
copy_exec /bin/sed
exit 0