1 #!/bin/bash 2 3 . lib.sh 4 5 # 6 # *** Description *** 7 # 8 # generate primary header with well-formed json prefixed 9 # with useless whitespace. 10 # 11 # secondary header is corrupted on purpose as well 12 # 13 14 # $1 full target dir 15 # $2 full source luks2 image 16 17 function prepare() 18 { 19 cp $SRC_IMG $TGT_IMG 20 test -d $TMPDIR || mkdir $TMPDIR 21 read_luks2_json0 $TGT_IMG $TMPDIR/json0 22 read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0 23 read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr1 24 } 25 26 function generate() 27 { 28 read -r json_str < $TMPDIR/json0 29 json_str=" $json_str" # add useless opening whitespace 30 test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2 31 32 printf "%s" "$json_str" | _dd of=$TMPDIR/json0 bs=1 conv=notrunc 33 34 merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0 35 erase_checksum $TMPDIR/area0 36 chks0=$(calc_sha256_checksum_file $TMPDIR/area0) 37 write_checksum $chks0 $TMPDIR/area0 38 write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG 39 kill_bin_hdr $TMPDIR/hdr1 40 write_luks2_hdr1 $TMPDIR/hdr1 $TGT_IMG 41 } 42 43 function check() 44 { 45 read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1 46 local str_res1=$(head -c 6 $TMPDIR/hdr_res1) 47 test "$str_res1" = "VACUUM" || exit 2 48 49 read_luks2_json0 $TGT_IMG $TMPDIR/json_res0 50 chks_res0=$(read_sha256_checksum $TGT_IMG) 51 test "$chks0" = "$chks_res0" || exit 2 52 IFS= read -r json_str_res0 < $TMPDIR/json_res0 53 test "$json_str" = "$json_str_res0" || exit 2 54 } 55 56 function cleanup() 57 { 58 rm -f $TMPDIR/* 59 rm -fd $TMPDIR 60 } 61 62 test $# -eq 2 || exit 1 63 64 TGT_IMG=$1/$(test_img_name $0) 65 SRC_IMG=$2 66 67 prepare 68 generate 69 check 70 cleanup