tests/generators/generate-luks2-non-null-byte-beyond-json0.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate primary header with json area concluded with illegal
   9 # byte beyond terminating '}' character.
  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"X # add illegal 'X' beyond json format
  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         read -r json_str_res0 < $TMPDIR/json_res0
  53         local len=${#json_str_res0}
  54         len=$((len-1))
  55         test ${json_str_res0:len:1} = "X" || exit 2
  56 }
  57
  58 function cleanup()
  59 {
  60         rm -f $TMPDIR/*
  61         rm -fd $TMPDIR
  62 }
  63
  64 test $# -eq 2 || exit 1
  65
  66 TGT_IMG=$1/$(test_img_name $0)
  67 SRC_IMG=$2
  68
  69 prepare
  70 generate
  71 check
  72 cleanup