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Do not create excessively large headers.

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When creating LUKS2 header with specified --offset much larger
then LUKS2 header size we needlessly also wipe (allocate up to
--offset) much larger file than needed.
This commit is contained in:
Ondrej Kozina
2020-06-16 12:21:29 +02:00
committed by Milan Broz
parent ac535923e0
commit a15008d876
4 changed files with 10 additions and 4 deletions
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6
tests/compat-test2
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@@ -713,6 +713,12 @@ $CRYPTSETUP luksDump _fakedev_ --header $HEADER_IMG | grep -q "5: luks2" || fail
$CRYPTSETUP luksKillSlot -q _fakedev_ --header $HEADER_IMG 5 || fail
$CRYPTSETUP luksDump _fakedev_ --header $HEADER_IMG | grep -q "5: luks2" && fail
echo $PWD1 | $CRYPTSETUP open --test-passphrase $HEADER_IMG || fail
rm $HEADER_IMG || fail
# create exactly 16 MiBs LUKS2 header
echo $PWD1 | $CRYPTSETUP -q luksFormat $FAST_PBKDF_OPT --type luks2 $LOOPDEV --header $HEADER_IMG --luks2-keyslots-size 16352k --luks2-metadata-size 16k --offset 131072 >/dev/null || fail
SIZE=$(stat --printf=%s $HEADER_IMG)
test $SIZE -eq 16777216 || fail
$CRYPTSETUP -q luksDump $HEADER_IMG | grep -q "offset: $((512 * 131072)) \[bytes\]" || fail
prepare "[29] Repair metadata" wipe
xz -dk $HEADER_LUKS2_PV.xz