#!/bin/bash

. lib.sh

#
# *** Description ***
#
# generate primary header with config json size mismatching
# value in binary header
#
# secondary header is corrupted on purpose as well
#

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

function generate()
{
	JS=$(((LUKS2_HDR_SIZE-LUKS2_BIN_HDR_SIZE)*512))
	TEST_MDA_SIZE=$LUKS2_HDR_SIZE_32K
	TEST_MDA_SIZE_BYTES=$((TEST_MDA_SIZE*512))
	TEST_JSN_SIZE=$((TEST_MDA_SIZE-LUKS2_BIN_HDR_SIZE))

	json_str=$(jq -c '.' $TMPDIR/json0)

	write_luks2_json "$json_str" $TMPDIR/json0 $TEST_JSN_SIZE
	write_luks2_json "$json_str" $TMPDIR/json1 $TEST_JSN_SIZE

	write_bin_hdr_size $TMPDIR/hdr0 $TEST_MDA_SIZE_BYTES
	write_bin_hdr_size $TMPDIR/hdr1 $TEST_MDA_SIZE_BYTES
	write_bin_hdr_offset $TMPDIR/hdr1 $TEST_MDA_SIZE_BYTES

	lib_mangle_json_hdr0 $TEST_MDA_SIZE $TEST_JSN_SIZE
	lib_mangle_json_hdr1 $TEST_MDA_SIZE $TEST_JSN_SIZE
}

function check()
{
	read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr_res0
	local str_res1=$(head -c 4 $TMPDIR/hdr_res0)
	test "$str_res1" = "LUKS" || exit 2

	read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1 $TEST_MDA_SIZE
	local str_res1=$(head -c 4 $TMPDIR/hdr_res1)
	test "$str_res1" = "SKUL" || exit 2

	read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
	jq -c --arg js $JS 'if .config.json_size != ( $js | tostring )
	       then error("Unexpected value in result json") else empty end' $TMPDIR/json_res0 || exit 5
}

lib_prepare $@
generate
check
lib_cleanup