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path: root/tests/generators/generate-luks2-invalid-keyslots-size-c2.img.sh
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#!/bin/bash

. lib.sh

#
# *** Description ***
#
# generate primary header with keyslots_size less than sum of all keyslots area
# in json
#
# secondary header is corrupted on purpose as well
#

# $1 full target dir
# $2 full source luks2 image

function prepare()
{
	cp $SRC_IMG $TGT_IMG
	test -d $TMPDIR || mkdir $TMPDIR
	read_luks2_json0 $TGT_IMG $TMPDIR/json0
	read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0
	read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr1
}

function generate()
{
	json_str=$(jq '.config.keyslots_size = ([.keyslots[].area.size] | map(tonumber) | add - 4096 | tostring )' $TMPDIR/json0)
	test -n "$json_str" || exit 2
	test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2

	write_luks2_json "$json_str" $TMPDIR/json0

	merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0
	erase_checksum $TMPDIR/area0
	chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
	write_checksum $chks0 $TMPDIR/area0
	write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG
	kill_bin_hdr $TMPDIR/hdr1
	write_luks2_hdr1 $TMPDIR/hdr1 $TGT_IMG
}

function check()
{
	read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1
	local str_res1=$(head -c 6 $TMPDIR/hdr_res1)
	test "$str_res1" = "VACUUM" || exit 2

	read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
	jq -c 'if .config.keyslots_size != ([.keyslots[].area.size ] | map(tonumber) | add - 4096 | tostring)
	       then error("Unexpected value in result json") else empty end' $TMPDIR/json_res0 || exit 5
}

function cleanup()
{
	rm -f $TMPDIR/*
	rm -fd $TMPDIR
}

test $# -eq 2 || exit 1

TGT_IMG=$1/$(test_img_name $0)
SRC_IMG=$2

prepare
generate
check
cleanup