tests/generators/generate-luks2-metadata-size-64k-secondary.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate secondary header with one of allowed json area
   9 # size values. Test whether auto-recovery code is able
  10 # to validate secondary header with non-default json area
  11 # size.
  12 #
  13 # primary header is corrupted on purpose.
  14 #
  15
  16 # $1 full target dir
  17 # $2 full source luks2 image
  18
  19 function prepare()
  20 {
  21         cp $SRC_IMG $TGT_IMG
  22         test -d $TMPDIR || mkdir $TMPDIR
  23         read_luks2_json0 $TGT_IMG $TMPDIR/json0
  24         read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0
  25         read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr1
  26 }
  27
  28 function generate()
  29 {
  30         # 64 KiB metadata
  31         TEST_MDA_SIZE=$LUKS2_HDR_SIZE_64K
  32
  33         TEST_MDA_SIZE_BYTES=$((TEST_MDA_SIZE*512))
  34         TEST_JSN_SIZE=$((TEST_MDA_SIZE-LUKS2_BIN_HDR_SIZE))
  35         KEYSLOTS_OFFSET=$((TEST_MDA_SIZE*1024))
  36         JSON_DIFF=$(((TEST_MDA_SIZE-LUKS2_HDR_SIZE)*1024))
  37         JSON_SIZE=$((TEST_JSN_SIZE*512))
  38         DATA_OFFSET=16777216
  39
  40         json_str=$(jq -c --arg jdiff $JSON_DIFF --arg jsize $JSON_SIZE --arg off $DATA_OFFSET \
  41                    '.keyslots[].area.offset |= ( . | tonumber + ($jdiff | tonumber) | tostring) |
  42                     .config.json_size = $jsize |
  43                     .segments."0".offset = $off' $TMPDIR/json0)
  44         test -n "$json_str" || exit 2
  45         test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2
  46
  47         write_luks2_json "$json_str" $TMPDIR/json0 $TEST_JSN_SIZE
  48
  49         write_bin_hdr_size $TMPDIR/hdr0 $TEST_MDA_SIZE_BYTES
  50         write_bin_hdr_size $TMPDIR/hdr1 $TEST_MDA_SIZE_BYTES
  51
  52         write_bin_hdr_offset $TMPDIR/hdr1 $TEST_MDA_SIZE_BYTES
  53
  54         merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0 $TEST_JSN_SIZE
  55         merge_bin_hdr_with_json $TMPDIR/hdr1 $TMPDIR/json0 $TMPDIR/area1 $TEST_JSN_SIZE
  56
  57         erase_checksum $TMPDIR/area0
  58         chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
  59         write_checksum $chks0 $TMPDIR/area0
  60
  61         erase_checksum $TMPDIR/area1
  62         chks0=$(calc_sha256_checksum_file $TMPDIR/area1)
  63         write_checksum $chks0 $TMPDIR/area1
  64
  65         kill_bin_hdr $TMPDIR/area0
  66
  67         write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG $TEST_MDA_SIZE
  68         write_luks2_hdr1 $TMPDIR/area1 $TGT_IMG $TEST_MDA_SIZE
  69 }
  70
  71 function check()
  72 {
  73         read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr_res0 $TEST_MDA_SIZE
  74         local str_res0=$(head -c 6 $TMPDIR/hdr_res0)
  75         test "$str_res0" = "VACUUM" || exit 2
  76         read_luks2_json1 $TGT_IMG $TMPDIR/json_res1 $TEST_JSN_SIZE
  77         jq -c --arg koff $KEYSLOTS_OFFSET --arg jsize $JSON_SIZE \
  78                 'if ([.keyslots[].area.offset] | map(tonumber) | min | tostring != $koff) or
  79                     (.config.json_size != $jsize)
  80                 then error("Unexpected value in result json") else empty end' $TMPDIR/json_res1 || exit 5
  81 }
  82
  83 function cleanup()
  84 {
  85         rm -f $TMPDIR/*
  86         rm -fd $TMPDIR
  87 }
  88
  89 test $# -eq 2 || exit 1
  90
  91 TGT_IMG=$1/$(test_img_name $0)
  92 SRC_IMG=$2
  93
  94 prepare
  95 generate
  96 check
  97 cleanup