diff options
Diffstat (limited to '')
| -rw-r--r-- | tests/generators/lib.sh | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/tests/generators/lib.sh b/tests/generators/lib.sh new file mode 100644 index 0000000..9686148 --- /dev/null +++ b/tests/generators/lib.sh @@ -0,0 +1,180 @@ +#!/bin/bash + +# all in 512 bytes blocks (including binary hdr (4KiB)) +LUKS2_HDR_SIZE=32 # 16 KiB +LUKS2_HDR_SIZE_32K=64 # 32 KiB +LUKS2_HDR_SIZE_64K=128 # 64 KiB +LUKS2_HDR_SIZE_128K=256 # 128 KiB +LUKS2_HDR_SIZE_256K=512 # 256 KiB +LUKS2_HDR_SIZE_512K=1024 # 512 KiB +LUKS2_HDR_SIZE_1M=2048 # 1 MiB +LUKS2_HDR_SIZE_2M=4096 # 2 MiB +LUKS2_HDR_SIZE_4M=8192 # 4 MiB + +LUKS2_BIN_HDR_SIZE=8 # 4 KiB +LUKS2_JSON_SIZE=$((LUKS2_HDR_SIZE-LUKS2_BIN_HDR_SIZE)) + +LUKS2_BIN_HDR_CHKS_OFFSET=0x1C0 +LUKS2_BIN_HDR_CHKS_LENGTH=64 + +[ -z "$srcdir" ] && srcdir="." +TMPDIR=$srcdir/tmp + +repeat_str() { + printf "$1"'%.0s' $(eval "echo {1.."$(($2))"}"); +} + +function strindex() +{ + local x="${1%%$2*}" + [[ $x = $1 ]] && echo -1 || echo ${#x} +} + +function test_img_name() +{ + local str=$(basename $1) + str=${str#generate-} + str=${str%%.sh} + echo $str +} + +# read primary bin hdr +# 1:from 2:to +function read_luks2_bin_hdr0() +{ + _dd if=$1 of=$2 bs=512 count=$LUKS2_BIN_HDR_SIZE +} + +# read primary json area +# 1:from 2:to 3:[json only size (defaults to 12KiB)] +function read_luks2_json0() +{ + local _js=${4:-$LUKS2_JSON_SIZE} + local _js=$((_js*512/4096)) + _dd if=$1 of=$2 bs=4096 skip=1 count=$_js +} + +# read secondary bin hdr +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function read_luks2_bin_hdr1() +{ + _dd if=$1 of=$2 skip=${3:-$LUKS2_HDR_SIZE} bs=512 count=$LUKS2_BIN_HDR_SIZE +} + +# read secondary json area +# 1:from 2:to 3:[json only size (defaults to 12KiB)] +function read_luks2_json1() +{ + local _js=${3:-$LUKS2_JSON_SIZE} + _dd if=$1 of=$2 bs=512 skip=$((2*LUKS2_BIN_HDR_SIZE+_js)) count=$_js +} + +# read primary metadata area (bin + json) +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function read_luks2_hdr_area0() +{ + local _as=${3:-$LUKS2_HDR_SIZE} + local _as=$((_as*512)) + _dd if=$1 of=$2 bs=$_as count=1 +} + +# read secondary metadata area (bin + json) +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function read_luks2_hdr_area1() +{ + local _as=${3:-$LUKS2_HDR_SIZE} + local _as=$((_as*512)) + _dd if=$1 of=$2 bs=$_as skip=1 count=1 +} + +# write secondary bin hdr +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function write_luks2_bin_hdr1() +{ + _dd if=$1 of=$2 bs=512 seek=${3:-$LUKS2_HDR_SIZE} count=$LUKS2_BIN_HDR_SIZE conv=notrunc +} + +# write primary metadata area (bin + json) +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function write_luks2_hdr0() +{ + local _as=${3:-$LUKS2_HDR_SIZE} + local _as=$((_as*512)) + _dd if=$1 of=$2 bs=$_as count=1 conv=notrunc +} + +# write secondary metadata area (bin + json) +# 1:from 2:to 3:[metadata size (defaults to 16KiB)] +function write_luks2_hdr1() +{ + local _as=${3:-$LUKS2_HDR_SIZE} + local _as=$((_as*512)) + _dd if=$1 of=$2 bs=$_as seek=1 count=1 conv=notrunc +} + +# write json (includes padding) +# 1:json_string 2:to 3:[json size (defaults to 12KiB)] +function write_luks2_json() +{ + local _js=${3:-$LUKS2_JSON_SIZE} + local len=${#1} + echo -n -E "$1" > $2 + truncate -s $((_js*512)) $2 +} + +function kill_bin_hdr() +{ + printf "VACUUM" | _dd of=$1 bs=1 conv=notrunc +} + +function erase_checksum() +{ + _dd if=/dev/zero of=$1 bs=1 seek=$(printf %d $LUKS2_BIN_HDR_CHKS_OFFSET) count=$LUKS2_BIN_HDR_CHKS_LENGTH conv=notrunc +} + +function read_sha256_checksum() +{ + _dd if=$1 bs=1 skip=$(printf %d $LUKS2_BIN_HDR_CHKS_OFFSET) count=32 | xxd -c 32 -p +} + +# 1 - string with checksum +function write_checksum() +{ + test $# -eq 2 || return 1 + test $((${#1}/2)) -le $LUKS2_BIN_HDR_CHKS_LENGTH || { echo "too long"; return 1; } + + echo $1 | xxd -r -p | _dd of=$2 bs=1 seek=$(printf %d $LUKS2_BIN_HDR_CHKS_OFFSET) conv=notrunc +} + +function calc_sha256_checksum_file() +{ + sha256sum $1 | cut -d ' ' -f 1 +} + +function calc_sha256_checksum_stdin() +{ + sha256sum - | cut -d ' ' -f 1 +} + +# merge bin hdr with json to form metadata area +# 1:bin_hdr 2:json 3:to 4:[json size (defaults to 12KiB)] +function merge_bin_hdr_with_json() +{ + local _js=${4:-$LUKS2_JSON_SIZE} + local _js=$((_js*512/4096)) + _dd if=$1 of=$3 bs=4096 count=1 + _dd if=$2 of=$3 bs=4096 seek=1 count=$_js +} + +function _dd() +{ + dd $@ status=none +} + +function write_bin_hdr_size() { + printf '%016x' $2 | xxd -r -p -l 16 | _dd of=$1 bs=8 count=1 seek=1 conv=notrunc +} + +function write_bin_hdr_offset() { + printf '%016x' $2 | xxd -r -p -l 16 | _dd of=$1 bs=8 count=1 seek=32 conv=notrunc +} |