2 This file is part of systemd.
4 Copyright 2016 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 #ifdef HAVE_LIBCRYPTSETUP
21 #include <libcryptsetup.h>
23 #include <sys/mount.h>
25 #include "architecture.h"
26 #include "ask-password-api.h"
27 #include "blkid-util.h"
28 #include "dissect-image.h"
33 #include "hexdecoct.h"
34 #include "linux-3.13/dm-ioctl.h"
35 #include "mount-util.h"
36 #include "path-util.h"
37 #include "stat-util.h"
38 #include "stdio-util.h"
39 #include "string-table.h"
40 #include "string-util.h"
42 #include "udev-util.h"
43 #include "xattr-util.h"
45 _unused_
static int probe_filesystem(const char *node
, char **ret_fstype
) {
47 _cleanup_blkid_free_probe_ blkid_probe b
= NULL
;
51 b
= blkid_new_probe_from_filename(node
);
55 blkid_probe_enable_superblocks(b
, 1);
56 blkid_probe_set_superblocks_flags(b
, BLKID_SUBLKS_TYPE
);
59 r
= blkid_do_safeprobe(b
);
60 if (r
== -2 || r
== 1) {
61 log_debug("Failed to identify any partition type on partition %s", node
);
65 return -errno
?: -EIO
;
67 (void) blkid_probe_lookup_value(b
, "TYPE", &fstype
, NULL
);
88 int dissect_image(int fd
, const void *root_hash
, size_t root_hash_size
, DissectImageFlags flags
, DissectedImage
**ret
) {
91 sd_id128_t root_uuid
= SD_ID128_NULL
, verity_uuid
= SD_ID128_NULL
;
92 _cleanup_udev_enumerate_unref_
struct udev_enumerate
*e
= NULL
;
93 bool is_gpt
, is_mbr
, generic_rw
, multiple_generic
= false;
94 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
95 _cleanup_(dissected_image_unrefp
) DissectedImage
*m
= NULL
;
96 _cleanup_blkid_free_probe_ blkid_probe b
= NULL
;
97 _cleanup_udev_unref_
struct udev
*udev
= NULL
;
98 _cleanup_free_
char *generic_node
= NULL
;
99 sd_id128_t generic_uuid
= SD_ID128_NULL
;
100 const char *pttype
= NULL
;
101 struct udev_list_entry
*first
, *item
;
109 assert(root_hash
|| root_hash_size
== 0);
111 /* Probes a disk image, and returns information about what it found in *ret.
113 * Returns -ENOPKG if no suitable partition table or file system could be found.
114 * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. */
117 /* If a root hash is supplied, then we use the root partition that has a UUID that match the first
118 * 128bit of the root hash. And we use the verity partition that has a UUID that match the final
121 if (root_hash_size
< sizeof(sd_id128_t
))
124 memcpy(&root_uuid
, root_hash
, sizeof(sd_id128_t
));
125 memcpy(&verity_uuid
, (const uint8_t*) root_hash
+ root_hash_size
- sizeof(sd_id128_t
), sizeof(sd_id128_t
));
127 if (sd_id128_is_null(root_uuid
))
129 if (sd_id128_is_null(verity_uuid
))
133 if (fstat(fd
, &st
) < 0)
136 if (!S_ISBLK(st
.st_mode
))
139 b
= blkid_new_probe();
144 r
= blkid_probe_set_device(b
, fd
, 0, 0);
146 return -errno
?: -ENOMEM
;
148 if ((flags
& DISSECT_IMAGE_GPT_ONLY
) == 0) {
149 /* Look for file system superblocks, unless we only shall look for GPT partition tables */
150 blkid_probe_enable_superblocks(b
, 1);
151 blkid_probe_set_superblocks_flags(b
, BLKID_SUBLKS_TYPE
|BLKID_SUBLKS_USAGE
);
154 blkid_probe_enable_partitions(b
, 1);
155 blkid_probe_set_partitions_flags(b
, BLKID_PARTS_ENTRY_DETAILS
);
158 r
= blkid_do_safeprobe(b
);
159 if (r
== -2 || r
== 1) {
160 log_debug("Failed to identify any partition table.");
164 return -errno
?: -EIO
;
166 m
= new0(DissectedImage
, 1);
170 if (!(flags
& DISSECT_IMAGE_GPT_ONLY
) &&
171 (flags
& DISSECT_IMAGE_REQUIRE_ROOT
)) {
172 const char *usage
= NULL
;
174 (void) blkid_probe_lookup_value(b
, "USAGE", &usage
, NULL
);
175 if (STRPTR_IN_SET(usage
, "filesystem", "crypto")) {
176 _cleanup_free_
char *t
= NULL
, *n
= NULL
;
177 const char *fstype
= NULL
;
179 /* OK, we have found a file system, that's our root partition then. */
180 (void) blkid_probe_lookup_value(b
, "TYPE", &fstype
, NULL
);
188 if (asprintf(&n
, "/dev/block/%u:%u", major(st
.st_rdev
), minor(st
.st_rdev
)) < 0)
191 m
->partitions
[PARTITION_ROOT
] = (DissectedPartition
) {
195 .architecture
= _ARCHITECTURE_INVALID
,
202 m
->encrypted
= streq(fstype
, "crypto_LUKS");
211 (void) blkid_probe_lookup_value(b
, "PTTYPE", &pttype
, NULL
);
215 is_gpt
= streq_ptr(pttype
, "gpt");
216 is_mbr
= streq_ptr(pttype
, "dos");
218 if (!is_gpt
&& ((flags
& DISSECT_IMAGE_GPT_ONLY
) || !is_mbr
))
222 pl
= blkid_probe_get_partitions(b
);
224 return -errno
?: -ENOMEM
;
230 d
= udev_device_new_from_devnum(udev
, 'b', st
.st_rdev
);
238 log_debug("Kernel partitions never appeared.");
242 e
= udev_enumerate_new(udev
);
246 r
= udev_enumerate_add_match_parent(e
, d
);
250 r
= udev_enumerate_scan_devices(e
);
254 /* Count the partitions enumerated by the kernel */
256 first
= udev_enumerate_get_list_entry(e
);
257 udev_list_entry_foreach(item
, first
)
260 /* Count the partitions enumerated by blkid */
261 z
= blkid_partlist_numof_partitions(pl
);
265 log_debug("blkid and kernel partition list do not match.");
271 /* The kernel has probed fewer partitions than blkid? Maybe the kernel prober is still running
272 * or it got EBUSY because udev already opened the device. Let's reprobe the device, which is a
273 * synchronous call that waits until probing is complete. */
275 for (j
= 0; j
< 20; j
++) {
277 r
= ioctl(fd
, BLKRRPART
, 0);
280 if (r
>= 0 || r
!= -EBUSY
)
283 /* If something else has the device open, such as an udev rule, the ioctl will return
284 * EBUSY. Since there's no way to wait until it isn't busy anymore, let's just wait a
285 * bit, and try again.
287 * This is really something they should fix in the kernel! */
289 usleep(50 * USEC_PER_MSEC
);
296 e
= udev_enumerate_unref(e
);
299 first
= udev_enumerate_get_list_entry(e
);
300 udev_list_entry_foreach(item
, first
) {
301 _cleanup_udev_device_unref_
struct udev_device
*q
;
302 unsigned long long pflags
;
308 q
= udev_device_new_from_syspath(udev
, udev_list_entry_get_name(item
));
312 qn
= udev_device_get_devnum(q
);
316 if (st
.st_rdev
== qn
)
319 node
= udev_device_get_devnode(q
);
323 pp
= blkid_partlist_devno_to_partition(pl
, qn
);
327 pflags
= blkid_partition_get_flags(pp
);
329 nr
= blkid_partition_get_partno(pp
);
334 int designator
= _PARTITION_DESIGNATOR_INVALID
, architecture
= _ARCHITECTURE_INVALID
;
335 const char *stype
, *sid
, *fstype
= NULL
;
336 sd_id128_t type_id
, id
;
339 sid
= blkid_partition_get_uuid(pp
);
342 if (sd_id128_from_string(sid
, &id
) < 0)
345 stype
= blkid_partition_get_type_string(pp
);
348 if (sd_id128_from_string(stype
, &type_id
) < 0)
351 if (sd_id128_equal(type_id
, GPT_HOME
)) {
353 if (pflags
& GPT_FLAG_NO_AUTO
)
356 designator
= PARTITION_HOME
;
357 rw
= !(pflags
& GPT_FLAG_READ_ONLY
);
358 } else if (sd_id128_equal(type_id
, GPT_SRV
)) {
360 if (pflags
& GPT_FLAG_NO_AUTO
)
363 designator
= PARTITION_SRV
;
364 rw
= !(pflags
& GPT_FLAG_READ_ONLY
);
365 } else if (sd_id128_equal(type_id
, GPT_ESP
)) {
367 /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is not defined
368 * there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as recommended by the
369 * UEFI spec (See "12.3.3 Number and Location of System Partitions"). */
371 if (pflags
& GPT_FLAG_NO_BLOCK_IO_PROTOCOL
)
374 designator
= PARTITION_ESP
;
377 #ifdef GPT_ROOT_NATIVE
378 else if (sd_id128_equal(type_id
, GPT_ROOT_NATIVE
)) {
380 if (pflags
& GPT_FLAG_NO_AUTO
)
383 /* If a root ID is specified, ignore everything but the root id */
384 if (!sd_id128_is_null(root_uuid
) && !sd_id128_equal(root_uuid
, id
))
387 designator
= PARTITION_ROOT
;
388 architecture
= native_architecture();
389 rw
= !(pflags
& GPT_FLAG_READ_ONLY
);
390 } else if (sd_id128_equal(type_id
, GPT_ROOT_NATIVE_VERITY
)) {
392 if (pflags
& GPT_FLAG_NO_AUTO
)
395 m
->can_verity
= true;
397 /* Ignore verity unless a root hash is specified */
398 if (sd_id128_is_null(verity_uuid
) || !sd_id128_equal(verity_uuid
, id
))
401 designator
= PARTITION_ROOT_VERITY
;
402 fstype
= "DM_verity_hash";
403 architecture
= native_architecture();
407 #ifdef GPT_ROOT_SECONDARY
408 else if (sd_id128_equal(type_id
, GPT_ROOT_SECONDARY
)) {
410 if (pflags
& GPT_FLAG_NO_AUTO
)
413 /* If a root ID is specified, ignore everything but the root id */
414 if (!sd_id128_is_null(root_uuid
) && !sd_id128_equal(root_uuid
, id
))
417 designator
= PARTITION_ROOT_SECONDARY
;
418 architecture
= SECONDARY_ARCHITECTURE
;
419 rw
= !(pflags
& GPT_FLAG_READ_ONLY
);
420 } else if (sd_id128_equal(type_id
, GPT_ROOT_SECONDARY_VERITY
)) {
422 if (pflags
& GPT_FLAG_NO_AUTO
)
425 m
->can_verity
= true;
427 /* Ignore verity unless root has is specified */
428 if (sd_id128_is_null(verity_uuid
) || !sd_id128_equal(verity_uuid
, id
))
431 designator
= PARTITION_ROOT_SECONDARY_VERITY
;
432 fstype
= "DM_verity_hash";
433 architecture
= SECONDARY_ARCHITECTURE
;
437 else if (sd_id128_equal(type_id
, GPT_SWAP
)) {
439 if (pflags
& GPT_FLAG_NO_AUTO
)
442 designator
= PARTITION_SWAP
;
444 } else if (sd_id128_equal(type_id
, GPT_LINUX_GENERIC
)) {
446 if (pflags
& GPT_FLAG_NO_AUTO
)
450 multiple_generic
= true;
453 generic_rw
= !(pflags
& GPT_FLAG_READ_ONLY
);
455 generic_node
= strdup(node
);
461 if (designator
!= _PARTITION_DESIGNATOR_INVALID
) {
462 _cleanup_free_
char *t
= NULL
, *n
= NULL
;
465 if (m
->partitions
[designator
].found
)
478 m
->partitions
[designator
] = (DissectedPartition
) {
482 .architecture
= architecture
,
493 if (pflags
!= 0x80) /* Bootable flag */
496 if (blkid_partition_get_type(pp
) != 0x83) /* Linux partition */
500 multiple_generic
= true;
504 generic_node
= strdup(node
);
511 if (!m
->partitions
[PARTITION_ROOT
].found
) {
512 /* No root partition found? Then let's see if ther's one for the secondary architecture. And if not
513 * either, then check if there's a single generic one, and use that. */
515 if (m
->partitions
[PARTITION_ROOT_VERITY
].found
)
516 return -EADDRNOTAVAIL
;
518 if (m
->partitions
[PARTITION_ROOT_SECONDARY
].found
) {
519 m
->partitions
[PARTITION_ROOT
] = m
->partitions
[PARTITION_ROOT_SECONDARY
];
520 zero(m
->partitions
[PARTITION_ROOT_SECONDARY
]);
522 m
->partitions
[PARTITION_ROOT_VERITY
] = m
->partitions
[PARTITION_ROOT_SECONDARY_VERITY
];
523 zero(m
->partitions
[PARTITION_ROOT_SECONDARY_VERITY
]);
525 } else if (flags
& DISSECT_IMAGE_REQUIRE_ROOT
) {
527 /* If the root has was set, then we won't fallback to a generic node, because the root hash
530 return -EADDRNOTAVAIL
;
532 /* If we didn't find a generic node, then we can't fix this up either */
536 /* If we didn't find a properly marked root partition, but we did find a single suitable
537 * generic Linux partition, then use this as root partition, if the caller asked for it. */
538 if (multiple_generic
)
541 m
->partitions
[PARTITION_ROOT
] = (DissectedPartition
) {
544 .partno
= generic_nr
,
545 .architecture
= _ARCHITECTURE_INVALID
,
546 .node
= generic_node
,
547 .uuid
= generic_uuid
,
555 if (!m
->partitions
[PARTITION_ROOT_VERITY
].found
|| !m
->partitions
[PARTITION_ROOT
].found
)
556 return -EADDRNOTAVAIL
;
558 /* If we found the primary root with the hash, then we definitely want to suppress any secondary root
559 * (which would be weird, after all the root hash should only be assigned to one pair of
561 m
->partitions
[PARTITION_ROOT_SECONDARY
].found
= false;
562 m
->partitions
[PARTITION_ROOT_SECONDARY_VERITY
].found
= false;
564 /* If we found a verity setup, then the root partition is necessarily read-only. */
565 m
->partitions
[PARTITION_ROOT
].rw
= false;
573 /* Fill in file system types if we don't know them yet. */
574 for (i
= 0; i
< _PARTITION_DESIGNATOR_MAX
; i
++) {
575 DissectedPartition
*p
= m
->partitions
+ i
;
580 if (!p
->fstype
&& p
->node
) {
581 r
= probe_filesystem(p
->node
, &p
->fstype
);
586 if (streq_ptr(p
->fstype
, "crypto_LUKS"))
599 DissectedImage
* dissected_image_unref(DissectedImage
*m
) {
605 for (i
= 0; i
< _PARTITION_DESIGNATOR_MAX
; i
++) {
606 free(m
->partitions
[i
].fstype
);
607 free(m
->partitions
[i
].node
);
608 free(m
->partitions
[i
].decrypted_fstype
);
609 free(m
->partitions
[i
].decrypted_node
);
616 static int is_loop_device(const char *path
) {
617 char s
[strlen("/sys/dev/block/") + DECIMAL_STR_MAX(dev_t
) + 1 + DECIMAL_STR_MAX(dev_t
) + strlen("/../loop/")];
622 if (stat(path
, &st
) < 0)
625 if (!S_ISBLK(st
.st_mode
))
628 xsprintf(s
, "/sys/dev/block/%u:%u/loop/", major(st
.st_rdev
), minor(st
.st_rdev
));
629 if (access(s
, F_OK
) < 0) {
633 /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */
634 xsprintf(s
, "/sys/dev/block/%u:%u/../loop/", major(st
.st_rdev
), minor(st
.st_rdev
));
635 if (access(s
, F_OK
) < 0)
636 return errno
== ENOENT
? false : -errno
;
642 static int mount_partition(
643 DissectedPartition
*m
,
645 const char *directory
,
646 DissectImageFlags flags
) {
648 const char *p
, *options
= NULL
, *node
, *fstype
;
649 _cleanup_free_
char *chased
= NULL
;
656 node
= m
->decrypted_node
?: m
->node
;
657 fstype
= m
->decrypted_fstype
?: m
->fstype
;
659 if (!m
->found
|| !node
|| !fstype
)
662 /* Stacked encryption? Yuck */
663 if (streq_ptr(fstype
, "crypto_LUKS"))
666 rw
= m
->rw
&& !(flags
& DISSECT_IMAGE_READ_ONLY
);
669 r
= chase_symlinks(directory
, where
, CHASE_PREFIX_ROOT
, &chased
);
677 /* If requested, turn on discard support. */
678 if (STR_IN_SET(fstype
, "btrfs", "ext4", "vfat", "xfs") &&
679 ((flags
& DISSECT_IMAGE_DISCARD
) ||
680 ((flags
& DISSECT_IMAGE_DISCARD_ON_LOOP
) && is_loop_device(m
->node
))))
683 return mount_verbose(LOG_DEBUG
, node
, p
, fstype
, MS_NODEV
|(rw
? 0 : MS_RDONLY
), options
);
686 int dissected_image_mount(DissectedImage
*m
, const char *where
, DissectImageFlags flags
) {
692 if (!m
->partitions
[PARTITION_ROOT
].found
)
695 r
= mount_partition(m
->partitions
+ PARTITION_ROOT
, where
, NULL
, flags
);
699 r
= mount_partition(m
->partitions
+ PARTITION_HOME
, where
, "/home", flags
);
703 r
= mount_partition(m
->partitions
+ PARTITION_SRV
, where
, "/srv", flags
);
707 if (m
->partitions
[PARTITION_ESP
].found
) {
710 /* Mount the ESP to /efi if it exists and is empty. If it doesn't exist, use /boot instead. */
712 FOREACH_STRING(mp
, "/efi", "/boot") {
713 _cleanup_free_
char *p
= NULL
;
715 r
= chase_symlinks(mp
, where
, CHASE_PREFIX_ROOT
, &p
);
721 r
= mount_partition(m
->partitions
+ PARTITION_ESP
, where
, mp
, flags
);
731 #ifdef HAVE_LIBCRYPTSETUP
732 typedef struct DecryptedPartition
{
733 struct crypt_device
*device
;
736 } DecryptedPartition
;
738 struct DecryptedImage
{
739 DecryptedPartition
*decrypted
;
745 DecryptedImage
* decrypted_image_unref(DecryptedImage
* d
) {
746 #ifdef HAVE_LIBCRYPTSETUP
753 for (i
= 0; i
< d
->n_decrypted
; i
++) {
754 DecryptedPartition
*p
= d
->decrypted
+ i
;
756 if (p
->device
&& p
->name
&& !p
->relinquished
) {
757 r
= crypt_deactivate(p
->device
, p
->name
);
759 log_debug_errno(r
, "Failed to deactivate encrypted partition %s", p
->name
);
763 crypt_free(p
->device
);
772 #ifdef HAVE_LIBCRYPTSETUP
774 static int make_dm_name_and_node(const void *original_node
, const char *suffix
, char **ret_name
, char **ret_node
) {
775 _cleanup_free_
char *name
= NULL
, *node
= NULL
;
778 assert(original_node
);
783 base
= strrchr(original_node
, '/');
790 name
= strjoin(base
, suffix
);
793 if (!filename_is_valid(name
))
796 node
= strjoin(crypt_get_dir(), "/", name
);
807 static int decrypt_partition(
808 DissectedPartition
*m
,
809 const char *passphrase
,
810 DissectImageFlags flags
,
813 _cleanup_free_
char *node
= NULL
, *name
= NULL
;
814 struct crypt_device
*cd
;
820 if (!m
->found
|| !m
->node
|| !m
->fstype
)
823 if (!streq(m
->fstype
, "crypto_LUKS"))
826 r
= make_dm_name_and_node(m
->node
, "-decrypted", &name
, &node
);
830 if (!GREEDY_REALLOC0(d
->decrypted
, d
->n_allocated
, d
->n_decrypted
+ 1))
833 r
= crypt_init(&cd
, m
->node
);
837 r
= crypt_load(cd
, CRYPT_LUKS1
, NULL
);
841 r
= crypt_activate_by_passphrase(cd
, name
, CRYPT_ANY_SLOT
, passphrase
, strlen(passphrase
),
842 ((flags
& DISSECT_IMAGE_READ_ONLY
) ? CRYPT_ACTIVATE_READONLY
: 0) |
843 ((flags
& DISSECT_IMAGE_DISCARD_ON_CRYPTO
) ? CRYPT_ACTIVATE_ALLOW_DISCARDS
: 0));
851 d
->decrypted
[d
->n_decrypted
].name
= name
;
854 d
->decrypted
[d
->n_decrypted
].device
= cd
;
857 m
->decrypted_node
= node
;
867 static int verity_partition(
868 DissectedPartition
*m
,
869 DissectedPartition
*v
,
870 const void *root_hash
,
871 size_t root_hash_size
,
872 DissectImageFlags flags
,
875 _cleanup_free_
char *node
= NULL
, *name
= NULL
;
876 struct crypt_device
*cd
;
885 if (!m
->found
|| !m
->node
|| !m
->fstype
)
887 if (!v
->found
|| !v
->node
|| !v
->fstype
)
890 if (!streq(v
->fstype
, "DM_verity_hash"))
893 r
= make_dm_name_and_node(m
->node
, "-verity", &name
, &node
);
897 if (!GREEDY_REALLOC0(d
->decrypted
, d
->n_allocated
, d
->n_decrypted
+ 1))
900 r
= crypt_init(&cd
, v
->node
);
904 r
= crypt_load(cd
, CRYPT_VERITY
, NULL
);
908 r
= crypt_set_data_device(cd
, m
->node
);
912 r
= crypt_activate_by_volume_key(cd
, name
, root_hash
, root_hash_size
, CRYPT_ACTIVATE_READONLY
);
916 d
->decrypted
[d
->n_decrypted
].name
= name
;
919 d
->decrypted
[d
->n_decrypted
].device
= cd
;
922 m
->decrypted_node
= node
;
933 int dissected_image_decrypt(
935 const char *passphrase
,
936 const void *root_hash
,
937 size_t root_hash_size
,
938 DissectImageFlags flags
,
939 DecryptedImage
**ret
) {
941 _cleanup_(decrypted_image_unrefp
) DecryptedImage
*d
= NULL
;
942 #ifdef HAVE_LIBCRYPTSETUP
948 assert(root_hash
|| root_hash_size
== 0);
952 * = 0 → There was nothing to decrypt
953 * > 0 → Decrypted successfully
954 * -ENOKEY → There's something to decrypt but no key was supplied
955 * -EKEYREJECTED → Passed key was not correct
958 if (root_hash
&& root_hash_size
< sizeof(sd_id128_t
))
961 if (!m
->encrypted
&& !m
->verity
) {
966 #ifdef HAVE_LIBCRYPTSETUP
967 if (m
->encrypted
&& !passphrase
)
970 d
= new0(DecryptedImage
, 1);
974 for (i
= 0; i
< _PARTITION_DESIGNATOR_MAX
; i
++) {
975 DissectedPartition
*p
= m
->partitions
+ i
;
981 r
= decrypt_partition(p
, passphrase
, flags
, d
);
985 k
= PARTITION_VERITY_OF(i
);
987 r
= verity_partition(p
, m
->partitions
+ k
, root_hash
, root_hash_size
, flags
, d
);
992 if (!p
->decrypted_fstype
&& p
->decrypted_node
) {
993 r
= probe_filesystem(p
->decrypted_node
, &p
->decrypted_fstype
);
1008 int dissected_image_decrypt_interactively(
1010 const char *passphrase
,
1011 const void *root_hash
,
1012 size_t root_hash_size
,
1013 DissectImageFlags flags
,
1014 DecryptedImage
**ret
) {
1016 _cleanup_strv_free_erase_
char **z
= NULL
;
1023 r
= dissected_image_decrypt(m
, passphrase
, root_hash
, root_hash_size
, flags
, ret
);
1026 if (r
== -EKEYREJECTED
)
1027 log_error_errno(r
, "Incorrect passphrase, try again!");
1028 else if (r
!= -ENOKEY
) {
1029 log_error_errno(r
, "Failed to decrypt image: %m");
1034 log_error("Too many retries.");
1035 return -EKEYREJECTED
;
1040 r
= ask_password_auto("Please enter image passphrase!", NULL
, "dissect", "dissect", USEC_INFINITY
, 0, &z
);
1042 return log_error_errno(r
, "Failed to query for passphrase: %m");
1048 #ifdef HAVE_LIBCRYPTSETUP
1049 static int deferred_remove(DecryptedPartition
*p
) {
1051 struct dm_ioctl dm
= {
1055 DM_VERSION_PATCHLEVEL
1057 .data_size
= sizeof(dm
),
1058 .flags
= DM_DEFERRED_REMOVE
,
1061 _cleanup_close_
int fd
= -1;
1065 /* Unfortunately, libcryptsetup doesn't provide a proper API for this, hence call the ioctl() directly. */
1067 fd
= open("/dev/mapper/control", O_RDWR
|O_CLOEXEC
);
1071 strncpy(dm
.name
, p
->name
, sizeof(dm
.name
));
1073 if (ioctl(fd
, DM_DEV_REMOVE
, &dm
))
1080 int decrypted_image_relinquish(DecryptedImage
*d
) {
1082 #ifdef HAVE_LIBCRYPTSETUP
1089 /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a boolean so
1090 * that we don't clean it up ourselves either anymore */
1092 #ifdef HAVE_LIBCRYPTSETUP
1093 for (i
= 0; i
< d
->n_decrypted
; i
++) {
1094 DecryptedPartition
*p
= d
->decrypted
+ i
;
1096 if (p
->relinquished
)
1099 r
= deferred_remove(p
);
1101 return log_debug_errno(r
, "Failed to mark %s for auto-removal: %m", p
->name
);
1103 p
->relinquished
= true;
1110 int root_hash_load(const char *image
, void **ret
, size_t *ret_size
) {
1111 _cleanup_free_
char *text
= NULL
;
1112 _cleanup_free_
void *k
= NULL
;
1120 if (is_device_path(image
)) {
1121 /* If we are asked to load the root hash for a device node, exit early */
1127 r
= getxattr_malloc(image
, "user.verity.roothash", &text
, true);
1131 if (!IN_SET(r
, -ENODATA
, -EOPNOTSUPP
, -ENOENT
))
1134 fn
= newa(char, strlen(image
) + strlen(".roothash") + 1);
1135 n
= stpcpy(fn
, image
);
1136 e
= endswith(fn
, ".raw");
1140 strcpy(n
, ".roothash");
1142 r
= read_one_line_file(fn
, &text
);
1152 r
= unhexmem(text
, strlen(text
), &k
, &l
);
1155 if (l
< sizeof(sd_id128_t
))
1166 static const char *const partition_designator_table
[] = {
1167 [PARTITION_ROOT
] = "root",
1168 [PARTITION_ROOT_SECONDARY
] = "root-secondary",
1169 [PARTITION_HOME
] = "home",
1170 [PARTITION_SRV
] = "srv",
1171 [PARTITION_ESP
] = "esp",
1172 [PARTITION_SWAP
] = "swap",
1173 [PARTITION_ROOT_VERITY
] = "root-verity",
1174 [PARTITION_ROOT_SECONDARY_VERITY
] = "root-secondary-verity",
1177 DEFINE_STRING_TABLE_LOOKUP(partition_designator
, int);