tests/generators/generate-luks2-metadata-size-64k-inv-keyslots-size-c0.img.sh

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate primary with predefined json_size where keyslots size
   9 # overflows in data area (segment offset)
  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 $TMPDIR/hdr1
  24 }
  25
  26 function generate()
  27 {
  28         # 64KiB metadata
  29         TEST_MDA_SIZE=$LUKS2_HDR_SIZE_64K
  30
  31         TEST_MDA_SIZE_BYTES=$((TEST_MDA_SIZE*512))
  32         TEST_JSN_SIZE=$((TEST_MDA_SIZE-LUKS2_BIN_HDR_SIZE))
  33         KEYSLOTS_OFFSET=$((TEST_MDA_SIZE*1024))
  34         JSON_DIFF=$(((TEST_MDA_SIZE-LUKS2_HDR_SIZE)*1024))
  35         JSON_SIZE=$((TEST_JSN_SIZE*512))
  36         DATA_OFFSET=16777216
  37
  38         json_str=$(jq -c --arg jdiff $JSON_DIFF --arg jsize $JSON_SIZE --arg off $DATA_OFFSET \
  39                          --arg mda $((2*TEST_MDA_SIZE_BYTES)) \
  40                    '.keyslots[].area.offset |= ( . | tonumber + ($jdiff | tonumber) | tostring) |
  41                     .config.json_size = $jsize |
  42                     .config.keyslots_size = (((($off | tonumber) - ($mda | tonumber) + 4096)) | tostring ) |
  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         merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0 $TEST_JSN_SIZE
  53         merge_bin_hdr_with_json $TMPDIR/hdr1 $TMPDIR/json0 $TMPDIR/area1 $TEST_JSN_SIZE
  54
  55         erase_checksum $TMPDIR/area0
  56         chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
  57         write_checksum $chks0 $TMPDIR/area0
  58
  59         erase_checksum $TMPDIR/area1
  60         chks0=$(calc_sha256_checksum_file $TMPDIR/area1)
  61         write_checksum $chks0 $TMPDIR/area1
  62
  63         kill_bin_hdr $TMPDIR/area1
  64
  65         write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG $TEST_MDA_SIZE
  66         write_luks2_hdr1 $TMPDIR/area1 $TGT_IMG $TEST_MDA_SIZE
  67 }
  68
  69 function check()
  70 {
  71         read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1 $TEST_MDA_SIZE
  72         local str_res1=$(head -c 6 $TMPDIR/hdr_res1)
  73         test "$str_res1" = "VACUUM" || exit 2
  74         read_luks2_json0 $TGT_IMG $TMPDIR/json_res0 $TEST_JSN_SIZE
  75         jq -c --arg koff $KEYSLOTS_OFFSET --arg jsize $JSON_SIZE --arg off $DATA_OFFSET --arg mda $((2*TEST_MDA_SIZE_BYTES)) \
  76                 'if ([.keyslots[].area.offset] | map(tonumber) | min | tostring != $koff) or
  77                     (.config.json_size != $jsize) or
  78                     (.config.keyslots_size != (((($off | tonumber) - ($mda | tonumber) + 4096)) | tostring ))
  79                 then error("Unexpected value in result json") else empty end' $TMPDIR/json_res0 || exit 5
  80 }
  81
  82 function cleanup()
  83 {
  84         rm -f $TMPDIR/*
  85         rm -fd $TMPDIR
  86 }
  87
  88 test $# -eq 2 || exit 1
  89
  90 TGT_IMG=$1/$(test_img_name $0)
  91 SRC_IMG=$2
  92
  93 prepare
  94 generate
  95 check
  96 cleanup