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https://github.com/linux-apfs/apfstests.git
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Dave Chinner
cf89aed924
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
98 lines
3.2 KiB
Bash
Executable File
98 lines
3.2 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Google, Inc. All Rights Reserved.
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#
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# FS QA Test No. 440
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#
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# Test that when the filesystem tries to enforce that all files in a directory
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# tree use the same encryption policy, it doesn't get confused and incorrectly
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# return EPERM in cases where the parent's key is cached but not the child's, or
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# vice versa. Such situations can arise following removal of the master key
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# from the keyring. Regression test for:
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# 272f98f68462 ("fscrypt: fix context consistency check when key(s) unavailable")
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/encrypt
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch_encryption
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_require_xfs_io_command "set_encpolicy"
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_require_command "$KEYCTL_PROG" keyctl
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# Set up an encryption-capable filesystem and an encryption key.
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_new_session_keyring
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_scratch_mkfs_encrypted &>> $seqres.full
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_scratch_mount
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keydesc=$(_generate_key_descriptor)
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raw_key=$(_generate_raw_encryption_key)
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_add_encryption_key $keydesc $raw_key
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# Set up an encrypted directory containing a regular file, a subdirectory, and a
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# symlink.
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mkdir $SCRATCH_MNT/edir
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$XFS_IO_PROG -c "set_encpolicy $keydesc" $SCRATCH_MNT/edir
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mkdir $SCRATCH_MNT/edir/subdir
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ln -s target $SCRATCH_MNT/edir/symlink
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echo contents > $SCRATCH_MNT/edir/file
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# Starting from a fresh mount (no inodes have their encryption key cached),
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# reproduce the situation where an encrypted file *without* its key cached is
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# looked up or opened from within a directory *with* its key cached, and no key
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# is in the keyring. Try with a regular file, a directory, and a symlink.
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_scratch_cycle_mount
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echo
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echo "***** Parent has key, but child doesn't *****"
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exec 3< $SCRATCH_MNT/edir # pin inode with cached key in memory
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ls $SCRATCH_MNT/edir | sort
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_unlink_encryption_key $keydesc
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cat $SCRATCH_MNT/edir/file |& _filter_scratch
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ls $SCRATCH_MNT/edir/subdir
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cat $SCRATCH_MNT/edir/symlink |& _filter_scratch
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exec 3>&-
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# Now, the inverse: an encrypted file *with* its key cached is looked up or
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# opened from within a directory *without* its key cached, and no key is in the
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# keyring. This is most easily reproducible using a hard link. Note: the
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# expected behavior (at least, until we have a real API for revoking filesystem
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# encryption keys) is that we should still be able to open the file and read its
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# plaintext contents, even though its filename is shown in ciphertext!
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echo
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echo "***** Child has key, but parent doesn't *****"
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_add_encryption_key $keydesc $raw_key
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mkdir $SCRATCH_MNT/edir2
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$XFS_IO_PROG -c "set_encpolicy $keydesc" $SCRATCH_MNT/edir2
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ln $SCRATCH_MNT/edir/file $SCRATCH_MNT/edir2/link
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_scratch_cycle_mount
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cat $SCRATCH_MNT/edir2/link
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exec 3< $SCRATCH_MNT/edir2/link # pin inode with cached key in memory
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_unlink_encryption_key $keydesc
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stat $SCRATCH_MNT/edir/file |& _filter_scratch
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cat "$(find $SCRATCH_MNT/edir/ -type f)"
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exec 3>&-
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# success, all done
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status=0
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exit
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