2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2016 Google, Inc. All Rights Reserved.
5 # Functions for setting up and testing file encryption
8 # _require_scratch_encryption [-c CONTENTS_MODE] [-n FILENAMES_MODE]
9 # [-f POLICY_FLAGS] [-v POLICY_VERSION]
11 # Require encryption support on the scratch device.
13 # This checks for support for the default type of encryption policy (v1 with
14 # AES-256-XTS and AES-256-CTS). Options can be specified to also require
15 # support for a different type of encryption policy.
17 _require_scratch_encryption()
21 _require_xfs_io_command "set_encpolicy"
23 # The 'test_dummy_encryption' mount option interferes with trying to use
24 # encryption for real, even if we are just trying to get/set policies
25 # and never put any keys in the keyring. So skip the real encryption
26 # tests if the 'test_dummy_encryption' mount option was specified.
27 _exclude_scratch_mount_option "test_dummy_encryption"
29 # Make a filesystem on the scratch device with the encryption feature
30 # enabled. If this fails then probably the userspace tools (e.g.
31 # e2fsprogs or f2fs-tools) are too old to understand encryption.
32 if ! _scratch_mkfs_encrypted &>>$seqres.full; then
33 _notrun "$FSTYP userspace tools do not support encryption"
36 # Try to mount the filesystem. If this fails then either the kernel
37 # isn't aware of encryption, or the mkfs options were not compatible
38 # with encryption (e.g. ext4 with block size != PAGE_SIZE).
39 if ! _try_scratch_mount &>>$seqres.full; then
40 _notrun "kernel is unaware of $FSTYP encryption feature," \
41 "or mkfs options are not compatible with encryption"
44 # The kernel may be aware of encryption without supporting it. For
45 # example, for ext4 this is the case with kernels configured with
46 # CONFIG_EXT4_FS_ENCRYPTION=n. Detect support for encryption by trying
47 # to set an encryption policy. (For ext4 we could instead check for the
48 # presence of /sys/fs/ext4/features/encryption, but this is broken on
49 # some older kernels and is ext4-specific anyway.)
50 mkdir $SCRATCH_MNT/tmpdir
51 if _set_encpolicy $SCRATCH_MNT/tmpdir 2>&1 >>$seqres.full | \
52 egrep -q 'Inappropriate ioctl for device|Operation not supported'
54 _notrun "kernel does not support $FSTYP encryption"
56 rmdir $SCRATCH_MNT/tmpdir
58 # If required, check for support for the specific type of encryption
59 # policy required by the test.
61 _require_encryption_policy_support $SCRATCH_MNT "$@"
67 _require_encryption_policy_support()
71 local set_encpolicy_args=""
73 local policy_version=1
77 while getopts "c:n:f:v:" c; do
80 set_encpolicy_args+=" -$c $OPTARG"
83 set_encpolicy_args+=" -$c $OPTARG"
87 set_encpolicy_args+=" -$c $OPTARG"
88 policy_version=$OPTARG
91 _fail "Unrecognized option '$c'"
95 set_encpolicy_args=${set_encpolicy_args# }
97 echo "Checking whether kernel supports encryption policy: $set_encpolicy_args" \
100 if (( policy_flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 )); then
102 _scratch_mkfs_stable_inodes_encrypted &>> $seqres.full
107 if (( policy_version > 1 )); then
108 _require_xfs_io_command "get_encpolicy" "-t"
109 local output=$(_get_encpolicy $dir -t)
110 if [ "$output" != "supported" ]; then
111 if [ "$output" = "unsupported" ]; then
112 _notrun "kernel does not support $FSTYP encryption v2 API"
114 _fail "Unexpected output from 'get_encpolicy -t': $output"
116 # Both the kernel and xfs_io support v2 encryption policies, and
117 # therefore also filesystem-level keys -- since that's the only
118 # way to provide keys for v2 policies.
119 local raw_key=$(_generate_raw_encryption_key)
120 local keyspec=$(_add_enckey $mnt "$raw_key" | awk '{print $NF}')
122 _require_command "$KEYCTL_PROG" keyctl
124 local keyspec=$(_generate_session_encryption_key)
126 if _set_encpolicy $dir $keyspec $set_encpolicy_args \
127 2>&1 >>$seqres.full | egrep -q 'Invalid argument'; then
128 _notrun "kernel does not support encryption policy: '$set_encpolicy_args'"
130 # fscrypt allows setting policies with modes it knows about, even
131 # without kernel crypto API support. E.g. a policy using Adiantum
132 # encryption can be set on a kernel without CONFIG_CRYPTO_ADIANTUM.
133 # But actually trying to use such an encrypted directory will fail.
134 # To reliably check for availability of both the contents and filenames
135 # encryption modes, try creating a nonempty file.
136 if ! echo foo > $dir/file; then
137 _notrun "encryption policy '$set_encpolicy_args' is unusable; probably missing kernel crypto API support"
139 if (( policy_version <= 1 )); then
140 $KEYCTL_PROG clear @s
145 _scratch_mkfs_encrypted()
149 _scratch_mkfs -O encrypt
152 # erase the UBI volume; reformated automatically on next mount
153 $UBIUPDATEVOL_PROG ${SCRATCH_DEV} -t
156 _notrun "No encryption support for $FSTYP"
161 _scratch_mkfs_sized_encrypted()
165 MKFS_OPTIONS="$MKFS_OPTIONS -O encrypt" _scratch_mkfs_sized $*
168 _notrun "Filesystem $FSTYP not supported in _scratch_mkfs_sized_encrypted"
173 # Like _scratch_mkfs_encrypted(), but add -O stable_inodes if applicable for the
174 # filesystem type. This is necessary for using encryption policies that include
175 # the inode number in the IVs, e.g. policies with the IV_INO_LBLK_64 flag set.
176 _scratch_mkfs_stable_inodes_encrypted()
180 if ! _scratch_mkfs -O encrypt -O stable_inodes; then
181 _notrun "-O stable_inodes is not supported"
185 _scratch_mkfs_encrypted
190 # Give the invoking shell a new session keyring. This makes any keys we add to
191 # the session keyring scoped to the lifetime of the test script.
192 _new_session_keyring()
194 $KEYCTL_PROG new_session >>$seqres.full
197 # Generate a key descriptor (16 character hex string)
198 _generate_key_descriptor()
202 for ((i = 0; i < 8; i++)); do
203 keydesc="${keydesc}$(printf "%02x" $(( $RANDOM % 256 )))"
208 # Generate a raw encryption key, but don't add it to any keyring yet.
209 _generate_raw_encryption_key()
213 for ((i = 0; i < 64; i++)); do
214 raw="${raw}\\x$(printf "%02x" $(( $RANDOM % 256 )))"
219 # Add the specified raw encryption key to the session keyring, using the
220 # specified key descriptor.
221 _add_session_encryption_key()
227 # Add the key to the session keyring. The required structure is:
229 # #define FS_MAX_KEY_SIZE 64
230 # struct fscrypt_key {
232 # u8 raw[FS_MAX_KEY_SIZE];
236 # The kernel ignores 'mode' but requires that 'size' be 64.
238 # Keys are named $FSTYP:KEYDESC where KEYDESC is the 16-character key
239 # descriptor hex string. Newer kernels (ext4 4.8 and later, f2fs 4.6
240 # and later) also allow the common key prefix "fscrypt:" in addition to
241 # their filesystem-specific key prefix ("ext4:", "f2fs:"). It would be
242 # nice to use the common key prefix, but for now use the filesystem-
243 # specific prefix to make it possible to test older kernels...
245 local big_endian=$(echo -ne '\x11' | od -tx2 | head -1 | \
246 cut -f2 -d' ' | cut -c1 )
247 if (( big_endian )); then
248 local mode='\x00\x00\x00\x00'
249 local size='\x00\x00\x00\x40'
251 local mode='\x00\x00\x00\x00'
252 local size='\x40\x00\x00\x00'
254 echo -n -e "${mode}${raw}${size}" |
255 $KEYCTL_PROG padd logon $FSTYP:$keydesc @s >>$seqres.full
259 # Generate a random encryption key, add it to the session keyring, and print out
260 # the resulting key descriptor (example: "8bf798e1a494e1ec"). Requires the
261 # keyctl program. It's assumed the caller has already set up a test-scoped
262 # session keyring using _new_session_keyring.
264 _generate_session_encryption_key()
266 local keydesc=$(_generate_key_descriptor)
267 local raw=$(_generate_raw_encryption_key)
269 _add_session_encryption_key $keydesc $raw
274 # Unlink an encryption key from the session keyring, given its key descriptor.
275 _unlink_session_encryption_key()
278 local keyid=$($KEYCTL_PROG search @s logon $FSTYP:$keydesc)
279 $KEYCTL_PROG unlink $keyid >>$seqres.full
282 # Revoke an encryption key from the session keyring, given its key descriptor.
283 _revoke_session_encryption_key()
286 local keyid=$($KEYCTL_PROG search @s logon $FSTYP:$keydesc)
287 $KEYCTL_PROG revoke $keyid >>$seqres.full
290 # Set an encryption policy on the specified directory.
296 $XFS_IO_PROG -c "set_encpolicy $*" "$dir"
299 _user_do_set_encpolicy()
304 _user_do "$XFS_IO_PROG -c \"set_encpolicy $*\" \"$dir\""
307 # Display the specified file or directory's encryption policy.
313 $XFS_IO_PROG -c "get_encpolicy $*" "$file"
316 _user_do_get_encpolicy()
321 _user_do "$XFS_IO_PROG -c \"get_encpolicy $*\" \"$file\""
324 # Add an encryption key to the given filesystem.
331 echo -ne "$raw_key" | $XFS_IO_PROG -c "add_enckey $*" "$mnt"
334 _user_do_add_enckey()
340 _user_do "echo -ne \"$raw_key\" | $XFS_IO_PROG -c \"add_enckey $*\" \"$mnt\""
343 # Remove the given encryption key from the given filesystem.
350 $XFS_IO_PROG -c "rm_enckey $* $keyspec" "$mnt"
359 _user_do "$XFS_IO_PROG -c \"rm_enckey $* $keyspec\" \"$mnt\""
362 # Get the status of the given encryption key on the given filesystem.
369 $XFS_IO_PROG -c "enckey_status $* $keyspec" "$mnt"
372 _user_do_enckey_status()
378 _user_do "$XFS_IO_PROG -c \"enckey_status $* $keyspec\" \"$mnt\""
381 # Retrieve the encryption nonce of the given inode as a hex string. The nonce
382 # was randomly generated by the filesystem and isn't exposed directly to
383 # userspace. But it can be read using the filesystem's debugging tools.
384 _get_encryption_nonce()
391 # Use debugfs to dump the special xattr named "c", which is the
392 # file's fscrypt_context. This produces a line like:
394 # c (28) = 01 01 04 02 00 00 00 00 00 00 00 00 ef bd 18 76 5d f6 41 4e c0 a2 cd 5f 91 29 7e 12
396 # Then filter it to get just the 16-byte 'nonce' field at the end:
398 # efbd18765df6414ec0a2cd5f91297e12
400 $DEBUGFS_PROG $device -R "ea_get <$inode> c" 2>>$seqres.full \
401 | grep '^c ' | sed 's/^.*=//' | tr -d ' \n' | tail -c 32
404 # dump.f2fs prints the fscrypt_context like:
406 # xattr: e_name_index:9 e_name:c e_name_len:1 e_value_size:28 e_value:
408 # contents_encryption_mode: 0x1
409 # filenames_encryption_mode: 0x4
411 # master_key_descriptor: 0000000000000000
412 # nonce: EFBD18765DF6414EC0A2CD5F91297E12
414 # Also support the case where the whole xattr is printed as hex,
415 # as is the case for fscrypt_context_v2.
417 # xattr: e_name_index:9 e_name:c e_name_len:1 e_value_size:40 e_value:
418 # 020104020000000033809BFEBE68A4AD264079B30861DD5E6B9E72D07523C58794ACF52534BAA756
420 $DUMP_F2FS_PROG -i $inode $device | awk '
421 /\<e_name:c\>/ { found = 1 }
422 (/^nonce:/ || /^[[:xdigit:]]+$/) && found {
423 print substr($0, length($0) - 31, 32);
428 _fail "_get_encryption_nonce() isn't implemented on $FSTYP"
433 # Require support for _get_encryption_nonce()
434 _require_get_encryption_nonce_support()
436 echo "Checking for _get_encryption_nonce() support for $FSTYP" >> $seqres.full
439 _require_command "$DEBUGFS_PROG" debugfs
442 _require_command "$DUMP_F2FS_PROG" dump.f2fs
443 # For fscrypt_context_v2, we actually need a f2fs-tools version
444 # that has the patch "f2fs-tools: improve xattr value printing"
445 # (https://sourceforge.net/p/linux-f2fs/mailman/message/36648640/).
446 # Otherwise the xattr is incorrectly parsed as v1. But just let
447 # the test fail in that case, as it was an f2fs-tools bug...
450 _notrun "_get_encryption_nonce() isn't implemented on $FSTYP"
455 # Retrieve the encrypted filename stored on-disk for the given file.
456 # The name is printed to stdout in binary.
457 _get_ciphertext_filename()
465 # Extract the filename from the debugfs output line like:
467 # 131075 100644 (1) 0 0 0 22-Apr-2019 16:54 \xa2\x85\xb0z\x13\xe9\x09\x86R\xed\xdc\xce\xad\x14d\x19
469 # Bytes are shown either literally or as \xHH-style escape
470 # sequences; we have to decode the escaped bytes here.
472 $DEBUGFS_PROG $device -R "ls -l -r <$dir_inode>" \
473 2>>$seqres.full | perl -ne '
474 next if not /^\s*'$inode'\s+/;
477 s/\\x([[:xdigit:]]{2})/chr hex $1/eg;
481 # Extract the filename from the dump.f2fs output line like:
483 # i_name [UpkzIPuts9by1oDmE+Ivfw]
485 # The name is shown base64-encoded; we have to decode it here.
487 $DUMP_F2FS_PROG $device -i $inode | perl -ne '
488 next if not /^i_name\s+\[([A-Za-z0-9+,]+)\]/;
490 my @chars = split //, $1;
493 my $table = join "", (A..Z, a..z, 0..9, "+", ",");
495 $ac += index($table, $_) << $bits;
498 print chr($ac & 0xff);
504 print STDERR "Invalid base64-encoded string!\n";
508 _fail "_get_ciphertext_filename() isn't implemented on $FSTYP"
513 # Require support for _get_ciphertext_filename().
514 _require_get_ciphertext_filename_support()
516 echo "Checking for _get_ciphertext_filename() support for $FSTYP" >> $seqres.full
519 # Verify that the "ls -l -r" debugfs command is supported and
520 # that it hex-encodes non-ASCII characters, rather than using an
521 # ambiguous escaping method. This requires e2fsprogs v1.45.1 or
522 # later; or more specifically, a version that has the commit
523 # "debugfs: avoid ambiguity when printing filenames".
524 _require_command "$DEBUGFS_PROG" debugfs
526 touch $SCRATCH_MNT/$'\xc1'
528 if ! $DEBUGFS_PROG $SCRATCH_DEV -R "ls -l -r /" 2>&1 \
529 | tee -a $seqres.full | grep -E -q '\s+\\xc1\s*$'; then
530 _notrun "debugfs (e2fsprogs) is too old; doesn't support showing unambiguous on-disk filenames"
534 # Verify that dump.f2fs shows encrypted filenames in full. This
535 # requires f2fs-tools v1.13.0 or later; or more specifically, a
536 # version that has the commit
537 # "f2fs-tools: improve filename printing".
539 _require_command "$DUMP_F2FS_PROG" dump.f2fs
540 _require_command "$KEYCTL_PROG" keyctl
544 local keydesc=$(_generate_session_encryption_key)
545 local dir=$SCRATCH_MNT/test.${FUNCNAME[0]}
546 local file=$dir/$(perl -e 'print "A" x 255')
548 _set_encpolicy $dir $keydesc
550 local inode=$(stat -c %i $file)
553 $KEYCTL_PROG clear @s
555 # 255-character filename should result in 340 base64 characters.
556 if ! $DUMP_F2FS_PROG -i $inode $SCRATCH_DEV \
557 | grep -E -q '^i_name[[:space:]]+\[[A-Za-z0-9+,]{340}\]'; then
558 _notrun "dump.f2fs (f2fs-tools) is too old; doesn't support showing unambiguous on-disk filenames"
562 _notrun "_get_ciphertext_filename() isn't implemented on $FSTYP"
567 # Get an encrypted file's list of on-disk blocks as a comma-separated list of
568 # block offsets from the start of the device. "Blocks" are 512 bytes each here.
569 _get_ciphertext_block_list()
574 $XFS_IO_PROG -c fiemap $file | perl -ne '
575 next if not /^\s*\d+: \[\d+\.\.\d+\]: (\d+)\.\.(\d+)/;
576 print $_ . "," foreach $1..$2;' | sed 's/,$//'
579 # Dump a block list that was previously saved by _get_ciphertext_block_list().
580 _dump_ciphertext_blocks()
586 for block in $(tr ',' ' ' <<< $blocklist); do
587 dd if=$device bs=512 count=1 skip=$block status=none
591 _do_verify_ciphertext_for_encryption_policy()
593 local contents_encryption_mode=$1
594 local filenames_encryption_mode=$2
595 local policy_flags=$3
596 local set_encpolicy_args=$4
599 local crypt_contents_cmd="$here/src/fscrypt-crypt-util $7"
600 local crypt_filename_cmd="$here/src/fscrypt-crypt-util $8"
602 local blocksize=$(_get_block_size $SCRATCH_MNT)
603 local test_contents_files=()
604 local test_filenames_files=()
605 local i src dir dst inode blocklist \
606 padding_flag padding dir_inode len name f nonce decrypted_name
608 # Create files whose encrypted contents we'll verify. For each, save
609 # the information: (copy of original file, inode number of encrypted
610 # file, comma-separated block list) into test_contents_files[].
611 echo "Creating files for contents verification" >> $seqres.full
613 rm -f $tmp.testfile_*
614 for src in /dev/zero /dev/urandom; do
615 head -c $((4 * blocksize)) $src > $tmp.testfile_$i
618 dir=$SCRATCH_MNT/encdir
620 _set_encpolicy $dir $keyspec $set_encpolicy_args -f $policy_flags
621 for src in $tmp.testfile_*; do
624 inode=$(stat -c %i $dst)
625 blocklist=$(_get_ciphertext_block_list $dst)
626 test_contents_files+=("$src $inode $blocklist")
629 # Create files whose encrypted names we'll verify. For each, save the
630 # information: (original filename, inode number of encrypted file, inode
631 # of parent directory, padding amount) into test_filenames_files[]. Try
632 # each padding amount: 4, 8, 16, or 32 bytes. Also try various filename
633 # lengths, including boundary cases. Assume NAME_MAX == 255.
634 echo "Creating files for filenames verification" >> $seqres.full
635 for padding_flag in 0 1 2 3; do
636 padding=$((4 << padding_flag))
637 dir=$SCRATCH_MNT/encdir.pad$padding
639 dir_inode=$(stat -c %i $dir)
640 _set_encpolicy $dir $keyspec $set_encpolicy_args \
641 -f $((policy_flags | padding_flag))
642 for len in 1 3 15 16 17 32 100 254 255; do
643 name=$(tr -d -C a-zA-Z0-9 < /dev/urandom | head -c $len)
645 inode=$(stat -c %i $dir/$name)
646 test_filenames_files+=("$name $inode $dir_inode $padding")
650 # Now unmount the filesystem and verify the ciphertext we just wrote.
653 echo "Verifying encrypted file contents" >> $seqres.full
654 for f in "${test_contents_files[@]}"; do
655 read -r src inode blocklist <<< "$f"
656 nonce=$(_get_encryption_nonce $SCRATCH_DEV $inode)
657 _dump_ciphertext_blocks $SCRATCH_DEV $blocklist > $tmp.actual_contents
658 $crypt_contents_cmd $contents_encryption_mode $raw_key_hex \
659 --file-nonce=$nonce --block-size=$blocksize \
660 --inode-number=$inode < $src > $tmp.expected_contents
661 if ! cmp $tmp.expected_contents $tmp.actual_contents; then
662 _fail "Expected encrypted contents != actual encrypted contents. File: $f"
664 $crypt_contents_cmd $contents_encryption_mode $raw_key_hex \
665 --decrypt --file-nonce=$nonce --block-size=$blocksize \
666 --inode-number=$inode \
667 < $tmp.actual_contents > $tmp.decrypted_contents
668 if ! cmp $src $tmp.decrypted_contents; then
669 _fail "Contents decryption sanity check failed. File: $f"
673 echo "Verifying encrypted file names" >> $seqres.full
674 for f in "${test_filenames_files[@]}"; do
675 read -r name inode dir_inode padding <<< "$f"
676 nonce=$(_get_encryption_nonce $SCRATCH_DEV $dir_inode)
677 _get_ciphertext_filename $SCRATCH_DEV $inode $dir_inode \
680 $crypt_filename_cmd $filenames_encryption_mode \
681 $raw_key_hex --file-nonce=$nonce --padding=$padding \
682 --block-size=255 --inode-number=$dir_inode \
684 if ! cmp $tmp.expected_name $tmp.actual_name; then
685 _fail "Expected encrypted filename != actual encrypted filename. File: $f"
687 $crypt_filename_cmd $filenames_encryption_mode $raw_key_hex \
688 --decrypt --file-nonce=$nonce --padding=$padding \
689 --block-size=255 --inode-number=$dir_inode \
690 < $tmp.actual_name > $tmp.decrypted_name
691 decrypted_name=$(tr -d '\0' < $tmp.decrypted_name)
692 if [ "$name" != "$decrypted_name" ]; then
693 _fail "Filename decryption sanity check failed ($name != $decrypted_name). File: $f"
698 # fscrypt UAPI constants (see <linux/fscrypt.h>)
700 FSCRYPT_MODE_AES_256_XTS=1
701 FSCRYPT_MODE_AES_256_CTS=4
702 FSCRYPT_MODE_AES_128_CBC=5
703 FSCRYPT_MODE_AES_128_CTS=6
704 FSCRYPT_MODE_ADIANTUM=9
706 FSCRYPT_POLICY_FLAG_DIRECT_KEY=0x04
707 FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64=0x08
709 _fscrypt_mode_name_to_num()
714 AES-256-XTS) echo $FSCRYPT_MODE_AES_256_XTS ;;
715 AES-256-CTS-CBC) echo $FSCRYPT_MODE_AES_256_CTS ;;
716 AES-128-CBC-ESSIV) echo $FSCRYPT_MODE_AES_128_CBC ;;
717 AES-128-CTS-CBC) echo $FSCRYPT_MODE_AES_128_CTS ;;
718 Adiantum) echo $FSCRYPT_MODE_ADIANTUM ;;
719 *) _fail "Unknown fscrypt mode: $name" ;;
723 # Verify that file contents and names are encrypted correctly when an encryption
724 # policy of the specified type is used.
726 # The first two parameters are the contents and filenames encryption modes to
727 # test. The following optional parameters are also accepted to further modify
728 # the type of encryption policy that is tested:
730 # 'v2': test a v2 encryption policy
731 # 'direct': test the DIRECT_KEY policy flag
732 # 'iv_ino_lblk_64': test the IV_INO_LBLK_64 policy flag
734 _verify_ciphertext_for_encryption_policy()
736 local contents_encryption_mode=$1
737 local filenames_encryption_mode=$2
739 local policy_version=1
741 local set_encpolicy_args=""
742 local crypt_util_args=""
743 local crypt_util_contents_args=""
744 local crypt_util_filename_args=""
753 if [ $contents_encryption_mode != \
754 $filenames_encryption_mode ]; then
755 _fail "For direct key mode, contents and filenames modes must match"
757 (( policy_flags |= FSCRYPT_POLICY_FLAG_DIRECT_KEY ))
760 (( policy_flags |= FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 ))
763 _fail "Unknown option '$opt' passed to ${FUNCNAME[0]}"
767 local contents_mode_num=$(_fscrypt_mode_name_to_num $contents_encryption_mode)
768 local filenames_mode_num=$(_fscrypt_mode_name_to_num $filenames_encryption_mode)
770 set_encpolicy_args+=" -c $contents_mode_num"
771 set_encpolicy_args+=" -n $filenames_mode_num"
773 if (( policy_version > 1 )); then
774 set_encpolicy_args+=" -v 2"
775 crypt_util_args+=" --kdf=HKDF-SHA512"
776 if (( policy_flags & FSCRYPT_POLICY_FLAG_DIRECT_KEY )); then
777 if (( policy_flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 )); then
778 _fail "'direct' and 'iv_ino_lblk_64' options are mutually exclusive"
780 crypt_util_args+=" --mode-num=$contents_mode_num"
781 elif (( policy_flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 )); then
782 crypt_util_args+=" --iv-ino-lblk-64"
783 crypt_util_contents_args+=" --mode-num=$contents_mode_num"
784 crypt_util_filename_args+=" --mode-num=$filenames_mode_num"
787 if (( policy_flags & ~FSCRYPT_POLICY_FLAG_DIRECT_KEY )); then
788 _fail "unsupported flags for v1 policy: $policy_flags"
790 if (( policy_flags & FSCRYPT_POLICY_FLAG_DIRECT_KEY )); then
791 crypt_util_args+=" --kdf=none"
793 crypt_util_args+=" --kdf=AES-128-ECB"
796 set_encpolicy_args=${set_encpolicy_args# }
798 _require_scratch_encryption $set_encpolicy_args -f $policy_flags
799 _require_test_program "fscrypt-crypt-util"
800 _require_xfs_io_command "fiemap"
801 _require_get_encryption_nonce_support
802 _require_get_ciphertext_filename_support
803 if (( policy_version == 1 )); then
804 _require_command "$KEYCTL_PROG" keyctl
807 echo "Creating encryption-capable filesystem" >> $seqres.full
808 if (( policy_flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 )); then
809 _scratch_mkfs_stable_inodes_encrypted &>> $seqres.full
811 _scratch_mkfs_encrypted &>> $seqres.full
815 crypt_util_args+=" --fs-uuid=$(blkid -s UUID -o value $SCRATCH_DEV | tr -d -)"
817 crypt_util_contents_args+="$crypt_util_args"
818 crypt_util_filename_args+="$crypt_util_args"
820 echo "Generating encryption key" >> $seqres.full
821 local raw_key=$(_generate_raw_encryption_key)
822 if (( policy_version > 1 )); then
823 local keyspec=$(_add_enckey $SCRATCH_MNT "$raw_key" \
826 local keyspec=$(_generate_key_descriptor)
828 _add_session_encryption_key $keyspec $raw_key
830 local raw_key_hex=$(echo "$raw_key" | tr -d '\\x')
833 echo -e "Verifying ciphertext with parameters:"
834 echo -e "\tcontents_encryption_mode: $contents_encryption_mode"
835 echo -e "\tfilenames_encryption_mode: $filenames_encryption_mode"
836 [ $# -ne 0 ] && echo -e "\toptions: $*"
838 _do_verify_ciphertext_for_encryption_policy \
839 "$contents_encryption_mode" \
840 "$filenames_encryption_mode" \
842 "$set_encpolicy_args" \
845 "$crypt_util_contents_args" \
846 "$crypt_util_filename_args"