tests/generators/generate-luks2-corrupted-hdr0-with-correct-chks.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate header with malformed json but correct checksum in primary header
   9 #
  10
  11 # $1 full target dir
  12 # $2 full source luks2 image
  13
  14 function prepare()
  15 {
  16         cp $SRC_IMG $TGT_IMG
  17         test -d $TMPDIR || mkdir $TMPDIR
  18         read_luks2_json0 $TGT_IMG $TMPDIR/json0
  19         read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0
  20 }
  21
  22 function generate()
  23 {
  24         read -r json_str < $TMPDIR/json0
  25         json_len=${#json_str}
  26         json_len=$((json_len-1)) # to replace json closing '}'
  27         json_new_str="${json_str:0:json_len},\""
  28
  29         while [ ${#json_new_str} -le $((LUKS2_JSON_SIZE*512)) ]; do
  30                 json_new_str=$json_new_str"all_work_and_no_play_makes_Jack_a_dull_boy_"
  31         done
  32
  33         printf "%s" $json_new_str | _dd of=$TMPDIR/json0 bs=512 count=$LUKS2_JSON_SIZE
  34
  35         merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0
  36         erase_checksum $TMPDIR/area0
  37         chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
  38         write_checksum $chks0 $TMPDIR/area0
  39         write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG
  40 }
  41
  42 function check()
  43 {
  44         chks_res0=$(read_sha256_checksum $TGT_IMG)
  45         test "$chks0" = "$chks_res0" || exit 2
  46         read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
  47         read -r json_str_res0 < $TMPDIR/json_res0
  48         test ${#json_str_res0} -eq $((LUKS2_JSON_SIZE*512)) || exit 2
  49 }
  50
  51 function cleanup()
  52 {
  53         rm -f $TMPDIR/*
  54         rm -fd $TMPDIR
  55 }
  56
  57 test $# -eq 2 || exit 1
  58
  59 TGT_IMG=$1/$(test_img_name $0)
  60 SRC_IMG=$2
  61
  62 prepare
  63 generate
  64 check
  65 cleanup