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

   1 #!/bin/bash
   2
   3 . lib.sh
   4
   5 #
   6 # *** Description ***
   7 #
   8 # generate primary with predefined json_size. There's only limited
   9 # set of values allowed as json size in config section of LUKS2
  10 # metadata
  11 #
  12 # secondary header is corrupted on purpose as well
  13 #
  14
  15 # $1 full target dir
  16 # $2 full source luks2 image
  17
  18 function generate()
  19 {
  20         TEST_MDA_SIZE=$LUKS2_HDR_SIZE_1M
  21
  22         TEST_MDA_SIZE_BYTES=$((TEST_MDA_SIZE*512))
  23         TEST_MDA_SIZE_BOGUS_BYTES=$((TEST_MDA_SIZE*512*2*1024))
  24         TEST_JSN_SIZE=$((TEST_MDA_SIZE-LUKS2_BIN_HDR_SIZE))
  25         KEYSLOTS_OFFSET=$((TEST_MDA_SIZE*1024))
  26         JSON_DIFF=$(((TEST_MDA_SIZE-LUKS2_HDR_SIZE)*1024))
  27         JSON_SIZE=$((TEST_JSN_SIZE*512))
  28         DATA_OFFSET=16777216
  29
  30         json_str=$(jq -c --arg jdiff $JSON_DIFF --arg jsize $JSON_SIZE --arg off $DATA_OFFSET \
  31                    '.keyslots[].area.offset |= ( . | tonumber + ($jdiff | tonumber) | tostring) |
  32                     .config.json_size = $jsize |
  33                     .segments."0".offset = $off' $TMPDIR/json0)
  34         test -n "$json_str" || exit 2
  35         test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2
  36
  37         write_luks2_json "$json_str" $TMPDIR/json0 $TEST_JSN_SIZE
  38         write_luks2_json "$json_str" $TMPDIR/json1 $TEST_JSN_SIZE
  39
  40         write_bin_hdr_size $TMPDIR/hdr0 $TEST_MDA_SIZE_BYTES
  41         write_bin_hdr_size $TMPDIR/hdr1 $TEST_MDA_SIZE_BOGUS_BYTES
  42
  43         write_bin_hdr_offset $TMPDIR/hdr1 $TEST_MDA_SIZE_BYTES
  44
  45         lib_mangle_json_hdr0 $TEST_MDA_SIZE $TEST_JSN_SIZE kill
  46         lib_mangle_json_hdr1 $TEST_MDA_SIZE $TEST_JSN_SIZE
  47 }
  48
  49 function check()
  50 {
  51         lib_hdr0_killed $TEST_MDA_SIZE || exit 2
  52
  53         read_luks2_json1 $TGT_IMG $TMPDIR/json_res1 $TEST_JSN_SIZE
  54         jq -c --arg koff $KEYSLOTS_OFFSET --arg jsize $JSON_SIZE \
  55                 'if ([.keyslots[].area.offset] | map(tonumber) | min | tostring != $koff) or
  56                     (.config.json_size != $jsize)
  57                 then error("Unexpected value in result json") else empty end' $TMPDIR/json_res1 || exit 5
  58 }
  59
  60 lib_prepare $@
  61 generate
  62 check
  63 lib_cleanup