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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright 2018 Google LLC
#
# FS QA Test generic/576
#
# Test using fs-verity and fscrypt simultaneously. This primarily verifies
# correct ordering of the hooks for each feature: fscrypt needs to be first.
#
. ./common/preamble
_begin_fstest auto quick verity encrypt
# Override the default cleanup function.
_cleanup()
{
cd /
_restore_fsverity_signatures
rm -f $tmp.*
}
# Import common functions.
. ./common/filter
. ./common/verity
. ./common/encrypt
# real QA test starts here
_supported_fs generic
_require_scratch_verity
_require_scratch_encryption
_require_command "$KEYCTL_PROG" keyctl
_require_fsverity_corruption
_disable_fsverity_signatures
_scratch_mkfs_encrypted_verity &>> $seqres.full
_scratch_mount
fsv_orig_file=$tmp.file
edir=$SCRATCH_MNT/edir
fsv_file=$edir/file.fsv
# Set up an encrypted directory.
_init_session_keyring
keydesc=$(_generate_session_encryption_key)
mkdir $edir
_set_encpolicy $edir $keydesc
# Create a file within the encrypted directory and enable verity on it.
# Then check that it has an encryption policy as well.
head -c 100000 /dev/zero > $fsv_orig_file
cp $fsv_orig_file $fsv_file
_fsv_enable $fsv_file
echo
$XFS_IO_PROG -r -c "get_encpolicy" $fsv_file | _filter_scratch \
| sed 's/Master key descriptor:.*/Master key descriptor: 0000000000000000/'
echo
# Verify that the file contents are as expected. This should be going through
# both the decryption and verity I/O paths.
cmp $fsv_orig_file $fsv_file && echo "Files matched"
# Just in case, try again after a mount cycle to empty the page cache.
_scratch_cycle_mount
cmp $fsv_orig_file $fsv_file && echo "Files matched"
# Corrupt some bytes as a sanity check that fs-verity is really working.
# This also verifies that the data on-disk is really encrypted, since otherwise
# the data being written here would be identical to the old data.
head -c 1000 /dev/zero | _fsv_scratch_corrupt_bytes $fsv_file 50000
md5sum $fsv_file |& _filter_scratch
# success, all done
status=0
exit
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