"Fossies" - the Fresh Open Source Software Archive

Member "cryptsetup-2.4.3/tests/generators/generate-luks2-non-null-bytes-beyond-json0.img.sh" (24 Jul 2021, 1761 Bytes) of package /linux/misc/cryptsetup-2.4.3.tar.xz:

As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) Bash source code syntax highlighting (style: standard) with prefixed line numbers and code folding option. Alternatively you can here view or download the uninterpreted source code file. 
    1 #!/bin/bash
    2 
    3 . lib.sh
    4 
    5 #
    6 # *** Description ***
    7 #
    8 # generate primary header with json area containing illegal bytes
    9 # beyond well-formed json format.
   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 QUOTE="[Homer J. Simpson]: Keep looking shocked and move slowly towards the cake."
   18 SPACE=20
   19 
   20 function prepare()
   21 {
   22     cp $SRC_IMG $TGT_IMG
   23     test -d $TMPDIR || mkdir $TMPDIR
   24     read_luks2_json0 $TGT_IMG $TMPDIR/json0
   25     read_luks2_bin_hdr0 $TGT_IMG $TMPDIR/hdr0
   26     read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr1
   27 }
   28 
   29 function generate()
   30 {
   31     read -r json_str < $TMPDIR/json0
   32     json_len_orig=${#json_str}
   33     json_len=$((json_len_orig+${#QUOTE}+SPACE))
   34     test ${#json_str} -lt $((LUKS2_JSON_SIZE*512)) || exit 2
   35 
   36     printf '%s' "$QUOTE" | _dd of=$TMPDIR/json0 seek=$((json_len_orig+SPACE)) bs=1 conv=notrunc
   37 
   38     merge_bin_hdr_with_json $TMPDIR/hdr0 $TMPDIR/json0 $TMPDIR/area0
   39     erase_checksum $TMPDIR/area0
   40     chks0=$(calc_sha256_checksum_file $TMPDIR/area0)
   41     write_checksum $chks0 $TMPDIR/area0
   42     write_luks2_hdr0 $TMPDIR/area0 $TGT_IMG
   43     kill_bin_hdr $TMPDIR/hdr1
   44     write_luks2_hdr1 $TMPDIR/hdr1 $TGT_IMG
   45 }
   46 
   47 function check()
   48 {
   49     read_luks2_bin_hdr1 $TGT_IMG $TMPDIR/hdr_res1
   50     local str_res1=$(head -c 6 $TMPDIR/hdr_res1)
   51     test "$str_res1" = "VACUUM" || exit 2
   52 
   53     read_luks2_json0 $TGT_IMG $TMPDIR/json_res0
   54     chks_res0=$(read_sha256_checksum $TGT_IMG)
   55     test "$chks0" = "$chks_res0" || exit 2
   56 
   57     _dd if=$TMPDIR/json_res0 of=$TMPDIR/quote skip=$((json_len_orig+SPACE)) count=${#QUOTE} bs=1
   58     json_str_res0=$(head -c ${#QUOTE} $TMPDIR/quote)
   59     test "$json_str_res0" = "$QUOTE" || exit 2
   60 }
   61 
   62 function cleanup()
   63 {
   64     rm -f $TMPDIR/*
   65     rm -fd $TMPDIR
   66 }
   67 
   68 test $# -eq 2 || exit 1
   69 
   70 TGT_IMG=$1/$(test_img_name $0)
   71 SRC_IMG=$2
   72 
   73 prepare
   74 generate
   75 check
   76 cleanup