tests/generators/generate-luks2-correct-full-json0.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate header with correct json of maximal size in primary slot.
   9 # Secondary header is broken on purpose.
  10 #
  11
  12 # $1 full target dir
  13 # $2 full source luks2 image
  14
  15 PATTERN="\"config\":{"
  16 KEY="\"config_key\":\""
  17
  18 function prepare()
  19 {
  20         cp $SRC_IMG $TGT_IMG
  21         test -d $TMPDIR || mkdir $TMPDIR
  22         read_luks2_json0 $TGT_IMG $TMPDIR/json0
  23         read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0
  24         read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr1
  25 }
  26
  27 function generate()
  28 {
  29         read -r json_str < $TMPDIR/json0
  30         json_len=${#json_str}
  31         pindex=$(strindex $json_str $PATTERN)
  32         test $pindex -gt 0 || exit 2
  33
  34         offset=${#PATTERN}
  35         offset=$((offset+pindex))
  36         key_len=${#KEY}
  37         remain=$((LUKS2_JSON_SIZE*512-json_len-key_len-2)) # -2: closing '"' and terminating '\0'
  38         if [ ${json_str:offset:1} = "}" ]; then
  39                 format_str="%s%s%s"
  40         else
  41                 format_str="%s%s,%s"
  42                 remain=$((remain-1)) # also count with separating ','
  43         fi
  44         test $remain -gt 0 || exit 2
  45
  46         fill=$(repeat_str "X" $remain)"\""
  47
  48         printf $format_str $KEY $fill ${json_str:$offset} | _dd of=$TMPDIR/json0 bs=1 seek=$offset conv=notrunc
  49
  50         merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0
  51         erase_checksum $TMPDIR/area0
  52         chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
  53         write_checksum $chks0 $TMPDIR/area0
  54         write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG
  55         kill_bin_hdr $TMPDIR/hdr1
  56         write_luks2_hdr1 $TMPDIR/hdr1 $TGT_IMG
  57 }
  58
  59 function check()
  60 {
  61         read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1
  62         local str_res1=$(head -c 6 $TMPDIR/hdr_res1)
  63         test "$str_res1" = "VACUUM" || exit 2
  64
  65         read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
  66         chks_res0=$(read_sha256_checksum $TGT_IMG)
  67         test "$chks0" = "$chks_res0" || exit 2
  68         #json_str_res0=$(< $TMPDIR/json_res0)
  69         read -r json_str_res0 < $TMPDIR/json_res0
  70         test ${#json_str_res0} -eq $((LUKS2_JSON_SIZE*512-1)) || exit 2
  71 }
  72
  73 function cleanup()
  74 {
  75         rm -f $TMPDIR/*
  76         rm -fd $TMPDIR
  77 }
  78
  79 test $# -eq 2 || exit 1
  80
  81 TGT_IMG=$1/$(test_img_name $0)
  82 SRC_IMG=$2
  83
  84 prepare
  85 generate
  86 check
  87 cleanup