tests/generators/generate-luks2-invalid-keyslots-size-c0.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate primary header with too large keyslots_size set in config section
   9 # (iow config.keyslots_size = data_offset - keyslots_offset + 512)
  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 $TMPDIR/hdr1
  24 }
  25
  26 function generate()
  27 {
  28         # make area 7 being included in area 6
  29         OFFS=$((2*LUKS2_HDR_SIZE*512))
  30         json_str=$(jq -c --arg off $OFFS '.config.keyslots_size = (.segments."0".offset | tonumber - ($off | tonumber) + 4096 | tostring)' $TMPDIR/json0)
  31         test -n "$json_str" || exit 2
  32         # [.keyslots[].area.offset | tonumber] | max | tostring ---> max offset in keyslot areas
  33         test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2
  34
  35         write_luks2_json "$json_str" $TMPDIR/json0
  36
  37         merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0
  38         erase_checksum $TMPDIR/area0
  39         chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
  40         write_checksum $chks0 $TMPDIR/area0
  41         write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG
  42         kill_bin_hdr $TMPDIR/hdr1
  43         write_luks2_hdr1 $TMPDIR/hdr1 $TGT_IMG
  44 }
  45
  46 function check()
  47 {
  48         read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1
  49         local str_res1=$(head -c 6 $TMPDIR/hdr_res1)
  50         test "$str_res1" = "VACUUM" || exit 2
  51
  52         read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
  53         jq -c --arg off $OFFS 'if .config.keyslots_size != ( .segments."0".offset | tonumber - ($off | tonumber) + 4096 | tostring )
  54                then error("Unexpected value in result json") else empty end' $TMPDIR/json_res0 || exit 5
  55 }
  56
  57 function cleanup()
  58 {
  59         rm -f $TMPDIR/*
  60         rm -fd $TMPDIR
  61 }
  62
  63 test $# -eq 2 || exit 1
  64
  65 TGT_IMG=$1/$(test_img_name $0)
  66 SRC_IMG=$2
  67
  68 prepare
  69 generate
  70 check
  71 cleanup