2 * libcryptsetup - cryptsetup library
4 * Copyright (C) 2004, Christophe Saout <christophe@saout.de>
5 * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
6 * Copyright (C) 2009-2011, Red Hat, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "libcryptsetup.h"
33 #include "crypto_backend.h"
39 char *metadata_device;
43 struct volume_key *volume_key;
45 uint64_t iteration_time;
50 /* used in CRYPT_LUKS1 */
52 uint64_t PBKDF2_per_sec;
54 /* used in CRYPT_PLAIN */
55 struct crypt_params_plain plain_hdr;
57 char *plain_cipher_mode;
60 /* used in CRYPT_LOOPAES */
61 struct crypt_params_loopaes loopaes_hdr;
63 char *loopaes_cipher_mode;
65 unsigned int loopaes_key_size;
67 /* callbacks definitions */
68 void (*log)(int level, const char *msg, void *usrptr);
70 int (*confirm)(const char *msg, void *usrptr);
72 int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
73 void *password_usrptr;
75 /* last error message */
76 char error[MAX_ERROR_LENGTH];
80 /* FIXME: not thread safe, remove this later */
81 static char global_error[MAX_ERROR_LENGTH] = {0};
84 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
85 static int _debug_level = 0;
87 void crypt_set_debug_level(int level)
92 int crypt_get_debug_level(void)
98 void crypt_log(struct crypt_device *cd, int level, const char *msg)
101 cd->log(level, msg, cd->log_usrptr);
102 else if (_default_log)
103 _default_log(level, msg, NULL);
106 static void crypt_set_error(struct crypt_device *cd, const char *error)
108 size_t size = strlen(error);
110 /* Set global error, ugly hack... */
111 strncpy(global_error, error, MAX_ERROR_LENGTH - 2);
112 if (size < MAX_ERROR_LENGTH && global_error[size - 1] == '\n')
113 global_error[size - 1] = '\0';
115 /* Set error string per context */
117 strncpy(cd->error, error, MAX_ERROR_LENGTH - 2);
118 if (size < MAX_ERROR_LENGTH && cd->error[size - 1] == '\n')
119 cd->error[size - 1] = '\0';
123 __attribute__((format(printf, 5, 6)))
124 void logger(struct crypt_device *cd, int level, const char *file,
125 int line, const char *format, ...)
130 va_start(argp, format);
132 if (vasprintf(&target, format, argp) > 0 ) {
134 crypt_log(cd, level, target);
136 } else if (_debug_level)
137 printf("# %s:%d %s\n", file ?: "?", line, target);
139 } else if (_debug_level)
140 printf("# %s\n", target);
143 if (level == CRYPT_LOG_ERROR)
144 crypt_set_error(cd, target);
151 static const char *mdata_device(struct crypt_device *cd)
153 return cd->metadata_device ?: cd->device;
156 static int init_crypto(struct crypt_device *ctx)
160 r = crypt_random_init(ctx);
162 log_err(ctx, _("Cannot initialize crypto RNG backend.\n"));
166 r = crypt_backend_init(ctx);
168 log_err(ctx, _("Cannot initialize crypto backend.\n"));
173 static int process_key(struct crypt_device *cd, const char *hash_name,
174 size_t key_size, const char *pass, size_t passLen,
175 struct volume_key **vk)
182 *vk = crypt_alloc_volume_key(key_size, NULL);
187 r = crypt_plain_hash(cd, hash_name, (*vk)->key, key_size, pass, passLen);
190 log_err(cd, _("Hash algorithm %s not supported.\n"),
193 log_err(cd, _("Key processing error (using hash %s).\n"),
195 crypt_free_volume_key(*vk);
199 } else if (passLen > key_size) {
200 memcpy((*vk)->key, pass, key_size);
202 memcpy((*vk)->key, pass, passLen);
208 static int isPLAIN(const char *type)
210 return (type && !strcmp(CRYPT_PLAIN, type));
213 static int isLUKS(const char *type)
215 return (type && !strcmp(CRYPT_LUKS1, type));
218 static int isLOOPAES(const char *type)
220 return (type && !strcmp(CRYPT_LOOPAES, type));
223 /* keyslot helpers */
224 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
226 if (*keyslot == CRYPT_ANY_SLOT) {
227 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
229 log_err(cd, _("All key slots full.\n"));
234 switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
235 case CRYPT_SLOT_INVALID:
236 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
237 *keyslot, LUKS_NUMKEYS - 1);
239 case CRYPT_SLOT_INACTIVE:
242 log_err(cd, _("Key slot %d is full, please select another one.\n"),
251 * compares UUIDs returned by device-mapper (striped by cryptsetup) and uuid in header
253 static int crypt_uuid_cmp(const char *dm_uuid, const char *hdr_uuid)
258 if (!dm_uuid || !hdr_uuid)
261 str = strchr(dm_uuid, '-');
265 for (i = 0, j = 1; hdr_uuid[i]; i++) {
266 if (hdr_uuid[i] == '-')
269 if (!str[j] || str[j] == '-')
272 if (str[j] != hdr_uuid[i])
280 int PLAIN_activate(struct crypt_device *cd,
282 struct volume_key *vk,
287 char *dm_cipher = NULL;
288 struct crypt_dm_active_device dmd = {
289 .device = crypt_get_device_name(cd),
291 .uuid = crypt_get_uuid(cd),
293 .offset = crypt_get_data_offset(cd),
294 .iv_offset = crypt_get_iv_offset(cd),
299 r = device_check_and_adjust(cd, dmd.device,
300 (dmd.flags & CRYPT_ACTIVATE_SHARED) ? DEV_SHARED : DEV_EXCL,
301 &dmd.size, &dmd.offset, &flags);
305 if (crypt_get_cipher_mode(cd))
306 r = asprintf(&dm_cipher, "%s-%s", crypt_get_cipher(cd), crypt_get_cipher_mode(cd));
308 r = asprintf(&dm_cipher, "%s", crypt_get_cipher(cd));
312 dmd.cipher = dm_cipher;
313 log_dbg("Trying to activate PLAIN device %s using cipher %s.", name, dmd.cipher);
315 r = dm_create_device(name, CRYPT_PLAIN, &dmd, 0);
318 if (!cd->plain_uuid && dm_query_device(name, DM_ACTIVE_UUID, &dmd) >= 0)
319 cd->plain_uuid = CONST_CAST(char*)dmd.uuid;
325 int crypt_confirm(struct crypt_device *cd, const char *msg)
327 if (!cd || !cd->confirm)
330 return cd->confirm(msg, cd->confirm_usrptr);
333 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
334 size_t *key_len, int force_verify)
340 if(!msg && asprintf(&prompt, _("Enter passphrase for %s: "),
341 cd->backing_file ?: crypt_get_device_name(cd)) < 0)
348 *key = crypt_safe_alloc(DEFAULT_PASSPHRASE_SIZE_MAX);
353 r = cd->password(msg, *key, DEFAULT_PASSPHRASE_SIZE_MAX,
354 cd->password_usrptr);
356 crypt_safe_free(*key);
361 r = crypt_get_key(msg, key, key_len, 0, NULL, cd->timeout,
362 (force_verify || cd->password_verify), cd);
365 return (r < 0) ? r: 0;
368 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
369 struct volume_key **vk)
371 char *passphrase_read = NULL;
372 size_t passphrase_size_read;
373 int r = -EINVAL, eperm = 0, tries = cd->tries;
377 crypt_free_volume_key(*vk);
380 r = key_from_terminal(cd, NULL, &passphrase_read,
381 &passphrase_size_read, 0);
385 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
386 passphrase_size_read, &cd->hdr, vk, cd);
389 crypt_safe_free(passphrase_read);
390 passphrase_read = NULL;
391 } while (r == -EPERM && (--tries > 0));
394 crypt_free_volume_key(*vk);
397 /* Report wrong passphrase if at least one try failed */
398 if (eperm && r == -EPIPE)
402 crypt_safe_free(passphrase_read);
406 static int key_from_file(struct crypt_device *cd, char *msg,
407 char **key, size_t *key_len,
408 const char *key_file, size_t key_size)
410 return crypt_get_key(msg, key, key_len, key_size, key_file,
414 void crypt_set_log_callback(struct crypt_device *cd,
415 void (*log)(int level, const char *msg, void *usrptr),
422 cd->log_usrptr = usrptr;
426 void crypt_set_confirm_callback(struct crypt_device *cd,
427 int (*confirm)(const char *msg, void *usrptr),
430 cd->confirm = confirm;
431 cd->confirm_usrptr = usrptr;
434 void crypt_set_password_callback(struct crypt_device *cd,
435 int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
438 cd->password = password;
439 cd->password_usrptr = usrptr;
442 static void _get_error(char *error, char *buf, size_t size)
444 if (!buf || size < 1)
447 strncpy(buf, error, size - 1);
448 buf[size - 1] = '\0';
454 void crypt_last_error(struct crypt_device *cd, char *buf, size_t size)
457 return _get_error(cd->error, buf, size);
460 /* Deprecated global error interface */
461 void crypt_get_error(char *buf, size_t size)
463 return _get_error(global_error, buf, size);
466 const char *crypt_get_dir(void)
471 int crypt_init(struct crypt_device **cd, const char *device)
473 struct crypt_device *h = NULL;
479 log_dbg("Allocating crypt device %s context.", device);
481 if (!(h = malloc(sizeof(struct crypt_device))))
484 memset(h, 0, sizeof(*h));
488 r = device_ready(NULL, device, O_RDONLY);
490 h->device = crypt_loop_get_device();
491 log_dbg("Not a block device, %s%s.",
492 h->device ? "using free loop device " :
493 "no free loop device found",
496 log_err(NULL, _("Cannot find a free loopback device.\n"));
501 /* Keep the loop open, dettached on last close. */
502 h->loop_fd = crypt_loop_attach(h->device, device, 0, 1, &readonly);
503 if (h->loop_fd == -1) {
504 log_err(NULL, _("Attaching loopback device failed "
505 "(loop device with autoclear flag is required).\n"));
510 h->backing_file = crypt_loop_backing_file(h->device);
511 r = device_ready(NULL, h->device, O_RDONLY);
519 if (!h->device && device && !(h->device = strdup(device))) {
524 if (dm_init(h, 1) < 0) {
529 h->iteration_time = 1000;
530 h->password_verify = 0;
532 h->rng_type = crypt_random_default_key_rng();
538 if (h->loop_fd != -1)
541 free(h->backing_file);
547 static int crypt_check_data_device_size(struct crypt_device *cd)
550 uint64_t size, size_min;
552 /* Check data device size, require at least one sector */
553 size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE;
555 r = device_size(crypt_get_device_name(cd), &size);
559 if (size < size_min) {
560 log_err(cd, _("LUKS header detected but device %s is too small.\n"),
561 crypt_get_device_name(cd));
568 int crypt_set_data_device(struct crypt_device *cd, const char *device)
573 log_dbg("Setting ciphertext data device to %s.", device ?: "(none)");
575 if (!isLUKS(cd->type)) {
576 log_err(cd, _("This operation is not supported for this device type.\n"));
580 /* metadata device must be set */
584 r = device_ready(NULL, device, O_RDONLY);
588 if (!(data_device = strdup(device)))
591 if (!cd->metadata_device)
592 cd->metadata_device = cd->device;
596 cd->device = data_device;
598 return crypt_check_data_device_size(cd);
601 int crypt_init_by_name_and_header(struct crypt_device **cd,
603 const char *header_device)
605 crypt_status_info ci;
606 struct crypt_dm_active_device dmd;
607 char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
611 log_dbg("Allocating crypt device context by device %s.", name);
613 ci = crypt_status(NULL, name);
614 if (ci == CRYPT_INVALID)
617 if (ci < CRYPT_ACTIVE) {
618 log_err(NULL, _("Device %s is not active.\n"), name);
622 r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_CIPHER |
623 DM_ACTIVE_UUID | DM_ACTIVE_KEYSIZE, &dmd);
630 r = crypt_init(cd, header_device);
632 r = crypt_init(cd, dmd.device);
634 /* Underlying device disappeared but mapping still active */
635 if (!dmd.device || r == -ENOTBLK)
636 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
639 /* Underlying device is not readable but crypt mapping exists */
641 free(CONST_CAST(void*)dmd.device);
643 r = crypt_init(cd, NULL);
651 if (!strncmp(CRYPT_PLAIN, dmd.uuid, sizeof(CRYPT_PLAIN)-1))
652 (*cd)->type = strdup(CRYPT_PLAIN);
653 else if (!strncmp(CRYPT_LOOPAES, dmd.uuid, sizeof(CRYPT_LOOPAES)-1))
654 (*cd)->type = strdup(CRYPT_LOOPAES);
655 else if (!strncmp(CRYPT_LUKS1, dmd.uuid, sizeof(CRYPT_LUKS1)-1))
656 (*cd)->type = strdup(CRYPT_LUKS1);
658 log_dbg("Unknown UUID set, some parameters are not set.");
660 log_dbg("Active device has no UUID set, some parameters are not set.");
663 r = crypt_set_data_device(*cd, dmd.device);
668 /* Try to initialise basic parameters from active device */
670 if (!(*cd)->backing_file && dmd.device && crypt_loop_device(dmd.device) &&
671 !((*cd)->backing_file = crypt_loop_backing_file(dmd.device))) {
676 if (isPLAIN((*cd)->type)) {
677 (*cd)->plain_uuid = strdup(dmd.uuid);
678 (*cd)->plain_hdr.hash = NULL; /* no way to get this */
679 (*cd)->plain_hdr.offset = dmd.offset;
680 (*cd)->plain_hdr.skip = dmd.iv_offset;
682 r = crypt_parse_name_and_mode(dmd.cipher, cipher, NULL, cipher_mode);
684 (*cd)->plain_cipher = strdup(cipher);
685 (*cd)->plain_cipher_mode = strdup(cipher_mode);
687 } else if (isLOOPAES((*cd)->type)) {
688 (*cd)->loopaes_uuid = strdup(dmd.uuid);
689 (*cd)->loopaes_hdr.offset = dmd.offset;
691 r = crypt_parse_name_and_mode(dmd.cipher, cipher,
692 &key_nums, cipher_mode);
694 (*cd)->loopaes_cipher = strdup(cipher);
695 (*cd)->loopaes_cipher_mode = strdup(cipher_mode);
696 /* version 3 uses last key for IV */
697 if (dmd.vk->keylength % key_nums)
699 (*cd)->loopaes_key_size = dmd.vk->keylength / key_nums;
701 } else if (isLUKS((*cd)->type)) {
702 if (mdata_device(*cd)) {
703 r = crypt_load(*cd, CRYPT_LUKS1, NULL);
705 log_dbg("LUKS device header does not match active device.");
711 /* checks whether UUIDs match each other */
712 r = crypt_uuid_cmp(dmd.uuid, (*cd)->hdr.uuid);
714 log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s",
715 (*cd)->hdr.uuid, dmd.uuid);
729 crypt_free_volume_key(dmd.vk);
730 free(CONST_CAST(void*)dmd.device);
731 free(CONST_CAST(void*)dmd.cipher);
732 free(CONST_CAST(void*)dmd.uuid);
736 int crypt_init_by_name(struct crypt_device **cd, const char *name)
738 return crypt_init_by_name_and_header(cd, name, NULL);
741 static int _crypt_format_plain(struct crypt_device *cd,
743 const char *cipher_mode,
745 size_t volume_key_size,
746 struct crypt_params_plain *params)
748 if (!cipher || !cipher_mode) {
749 log_err(cd, _("Invalid plain crypt parameters.\n"));
753 if (volume_key_size > 1024) {
754 log_err(cd, _("Invalid key size.\n"));
758 cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
762 cd->plain_cipher = strdup(cipher);
763 cd->plain_cipher_mode = strdup(cipher_mode);
766 cd->plain_uuid = strdup(uuid);
768 if (params && params->hash)
769 cd->plain_hdr.hash = strdup(params->hash);
771 cd->plain_hdr.offset = params ? params->offset : 0;
772 cd->plain_hdr.skip = params ? params->skip : 0;
773 cd->plain_hdr.size = params ? params->size : 0;
775 if (!cd->plain_cipher || !cd->plain_cipher_mode)
781 static int _crypt_format_luks1(struct crypt_device *cd,
783 const char *cipher_mode,
785 const char *volume_key,
786 size_t volume_key_size,
787 struct crypt_params_luks1 *params)
790 unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
791 unsigned long alignment_offset = 0;
793 if (!mdata_device(cd)) {
794 log_err(cd, _("Can't format LUKS without device.\n"));
799 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
802 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
807 if (params && params->data_device) {
808 cd->metadata_device = cd->device;
809 if (!(cd->device = strdup(params->data_device)))
811 required_alignment = params->data_alignment * SECTOR_SIZE;
812 } else if (params && params->data_alignment) {
813 required_alignment = params->data_alignment * SECTOR_SIZE;
815 get_topology_alignment(cd->device, &required_alignment,
816 &alignment_offset, DEFAULT_DISK_ALIGNMENT);
818 r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
819 (params && params->hash) ? params->hash : "sha1",
821 required_alignment / SECTOR_SIZE,
822 alignment_offset / SECTOR_SIZE,
823 cd->iteration_time, &cd->PBKDF2_per_sec,
824 cd->metadata_device, cd);
828 /* Wipe first 8 sectors - fs magic numbers etc. */
829 r = crypt_wipe(mdata_device(cd), 0, 8 * SECTOR_SIZE, CRYPT_WIPE_ZERO, 1);
832 log_err(cd, _("Cannot format device %s which is still in use.\n"),
835 log_err(cd, _("Cannot wipe header on device %s.\n"),
841 r = LUKS_write_phdr(mdata_device(cd), &cd->hdr, cd);
846 static int _crypt_format_loopaes(struct crypt_device *cd,
849 size_t volume_key_size,
850 struct crypt_params_loopaes *params)
852 if (!mdata_device(cd)) {
853 log_err(cd, _("Can't format LOOPAES without device.\n"));
857 if (volume_key_size > 1024) {
858 log_err(cd, _("Invalid key size.\n"));
862 cd->loopaes_key_size = volume_key_size;
864 cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
867 cd->loopaes_uuid = strdup(uuid);
869 if (params && params->hash)
870 cd->loopaes_hdr.hash = strdup(params->hash);
872 cd->loopaes_hdr.offset = params ? params->offset : 0;
873 cd->loopaes_hdr.skip = params ? params->skip : 0;
878 int crypt_format(struct crypt_device *cd,
881 const char *cipher_mode,
883 const char *volume_key,
884 size_t volume_key_size,
893 log_dbg("Context already formatted as %s.", cd->type);
897 log_dbg("Formatting device %s as type %s.", mdata_device(cd) ?: "(none)", type);
904 r = _crypt_format_plain(cd, cipher, cipher_mode,
905 uuid, volume_key_size, params);
906 else if (isLUKS(type))
907 r = _crypt_format_luks1(cd, cipher, cipher_mode,
908 uuid, volume_key, volume_key_size, params);
909 else if (isLOOPAES(type))
910 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
912 /* FIXME: allow plugins here? */
913 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
917 if (!r && !(cd->type = strdup(type)))
921 crypt_free_volume_key(cd->volume_key);
922 cd->volume_key = NULL;
928 int crypt_load(struct crypt_device *cd,
929 const char *requested_type,
930 void *params __attribute__((unused)))
932 struct luks_phdr hdr;
935 log_dbg("Trying to load %s crypt type from device %s.",
936 requested_type ?: "any", mdata_device(cd) ?: "(none)");
938 if (!mdata_device(cd))
941 if (requested_type && !isLUKS(requested_type))
944 if (cd->type && !isLUKS(cd->type)) {
945 log_dbg("Context is already initialised to type %s", cd->type);
953 r = LUKS_read_phdr(mdata_device(cd), &hdr, 1, cd);
957 if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1)))
960 memcpy(&cd->hdr, &hdr, sizeof(hdr));
962 /* cd->type and header must be set in context */
963 r = crypt_check_data_device_size(cd);
972 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
974 struct crypt_dm_active_device dmd;
977 /* Device context type must be initialised */
978 if (!cd->type || !crypt_get_uuid(cd))
981 log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
983 r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_CIPHER |
984 DM_ACTIVE_UUID | DM_ACTIVE_KEYSIZE |
985 DM_ACTIVE_KEY, &dmd);
987 log_err(NULL, _("Device %s is not active.\n"), name);
996 r = device_check_and_adjust(cd, dmd.device, DEV_OK, &new_size, &dmd.offset, &dmd.flags);
1000 if (new_size == dmd.size) {
1001 log_dbg("Device has already requested size %" PRIu64
1002 " sectors.", dmd.size);
1005 dmd.size = new_size;
1006 r = dm_create_device(name, cd->type, &dmd, 1);
1009 crypt_free_volume_key(dmd.vk);
1010 free(CONST_CAST(void*)dmd.cipher);
1011 free(CONST_CAST(void*)dmd.device);
1012 free(CONST_CAST(void*)dmd.uuid);
1017 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1019 if (!isLUKS(cd->type)) {
1020 log_err(cd, _("This operation is not supported for this device type.\n"));
1024 if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1025 log_dbg("UUID is the same as requested (%s) for device %s.",
1026 uuid, mdata_device(cd));
1031 log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device(cd));
1033 log_dbg("Requested new UUID refresh for %s.", mdata_device(cd));
1035 if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1038 return LUKS_hdr_uuid_set(mdata_device(cd), &cd->hdr, uuid, cd);
1041 int crypt_header_backup(struct crypt_device *cd,
1042 const char *requested_type,
1043 const char *backup_file)
1047 if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1050 r = init_crypto(cd);
1054 log_dbg("Requested header backup of device %s (%s) to "
1055 "file %s.", mdata_device(cd), requested_type, backup_file);
1057 return LUKS_hdr_backup(backup_file, mdata_device(cd), &cd->hdr, cd);
1060 int crypt_header_restore(struct crypt_device *cd,
1061 const char *requested_type,
1062 const char *backup_file)
1066 if (requested_type && !isLUKS(requested_type))
1069 /* Some hash functions need initialized gcrypt library */
1070 r = init_crypto(cd);
1074 log_dbg("Requested header restore to device %s (%s) from "
1075 "file %s.", mdata_device(cd), requested_type, backup_file);
1077 return LUKS_hdr_restore(backup_file, mdata_device(cd), &cd->hdr, cd);
1080 void crypt_free(struct crypt_device *cd)
1083 log_dbg("Releasing crypt device %s context.", mdata_device(cd));
1085 if (cd->loop_fd != -1)
1089 crypt_free_volume_key(cd->volume_key);
1092 free(cd->metadata_device);
1093 free(cd->backing_file);
1096 /* used in plain device only */
1097 free(CONST_CAST(void*)cd->plain_hdr.hash);
1098 free(cd->plain_cipher);
1099 free(cd->plain_cipher_mode);
1100 free(cd->plain_uuid);
1102 /* used in loop-AES device only */
1103 free(CONST_CAST(void*)cd->loopaes_hdr.hash);
1104 free(cd->loopaes_cipher);
1105 free(cd->loopaes_uuid);
1111 int crypt_suspend(struct crypt_device *cd,
1114 crypt_status_info ci;
1117 log_dbg("Suspending volume %s.", name);
1119 if (!isLUKS(cd->type)) {
1120 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1125 ci = crypt_status(NULL, name);
1126 if (ci < CRYPT_ACTIVE) {
1127 log_err(cd, _("Volume %s is not active.\n"), name);
1131 if (!cd && dm_init(NULL, 1) < 0)
1134 r = dm_status_suspended(name);
1139 log_err(cd, _("Volume %s is already suspended.\n"), name);
1144 r = dm_suspend_and_wipe_key(name);
1146 log_err(cd, "Suspend is not supported for device %s.\n", name);
1148 log_err(cd, "Error during suspending device %s.\n", name);
1155 int crypt_resume_by_passphrase(struct crypt_device *cd,
1158 const char *passphrase,
1159 size_t passphrase_size)
1161 struct volume_key *vk = NULL;
1164 log_dbg("Resuming volume %s.", name);
1166 if (!isLUKS(cd->type)) {
1167 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1172 r = dm_status_suspended(name);
1177 log_err(cd, _("Volume %s is not suspended.\n"), name);
1182 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
1183 passphrase_size, &cd->hdr, &vk, cd);
1185 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1189 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1191 log_err(cd, "Resume is not supported for device %s.\n", name);
1193 log_err(cd, "Error during resuming device %s.\n", name);
1197 crypt_free_volume_key(vk);
1198 return r < 0 ? r : keyslot;
1201 int crypt_resume_by_keyfile(struct crypt_device *cd,
1204 const char *keyfile,
1205 size_t keyfile_size)
1207 struct volume_key *vk = NULL;
1208 char *passphrase_read = NULL;
1209 size_t passphrase_size_read;
1212 log_dbg("Resuming volume %s.", name);
1214 if (!isLUKS(cd->type)) {
1215 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1220 r = dm_status_suspended(name);
1225 log_err(cd, _("Volume %s is not suspended.\n"), name);
1232 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1233 &passphrase_size_read, keyfile, keyfile_size);
1237 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
1238 passphrase_size_read, &cd->hdr, &vk, cd);
1243 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1245 log_err(cd, "Error during resuming device %s.\n", name);
1247 crypt_safe_free(passphrase_read);
1248 crypt_free_volume_key(vk);
1249 return r < 0 ? r : keyslot;
1252 // slot manipulation
1253 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1254 int keyslot, // -1 any
1255 const char *passphrase, // NULL -> terminal
1256 size_t passphrase_size,
1257 const char *new_passphrase, // NULL -> terminal
1258 size_t new_passphrase_size)
1260 struct volume_key *vk = NULL;
1261 char *password = NULL, *new_password = NULL;
1262 size_t passwordLen, new_passwordLen;
1265 log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1266 "new passphrase %sprovided.",
1267 passphrase ? "" : "not ", new_passphrase ? "" : "not ");
1269 if (!isLUKS(cd->type)) {
1270 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1274 r = keyslot_verify_or_find_empty(cd, &keyslot);
1278 if (!LUKS_keyslot_active_count(&cd->hdr)) {
1279 /* No slots used, try to use pre-generated key in header */
1280 if (cd->volume_key) {
1281 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1282 r = vk ? 0 : -ENOMEM;
1284 log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1287 } else if (passphrase) {
1288 /* Passphrase provided, use it to unlock existing keyslot */
1289 r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, passphrase,
1290 passphrase_size, &cd->hdr, &vk, cd);
1292 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1293 r = key_from_terminal(cd, _("Enter any passphrase: "),
1294 &password, &passwordLen, 0);
1298 r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, password,
1299 passwordLen, &cd->hdr, &vk, cd);
1300 crypt_safe_free(password);
1306 if (new_passphrase) {
1307 new_password = CONST_CAST(char*)new_passphrase;
1308 new_passwordLen = new_passphrase_size;
1310 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1311 &new_password, &new_passwordLen, 1);
1316 r = LUKS_set_key(mdata_device(cd), keyslot, new_password, new_passwordLen,
1317 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1322 if (!new_passphrase)
1323 crypt_safe_free(new_password);
1324 crypt_free_volume_key(vk);
1325 return r ?: keyslot;
1328 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1330 const char *keyfile,
1331 size_t keyfile_size,
1332 const char *new_keyfile,
1333 size_t new_keyfile_size)
1335 struct volume_key *vk = NULL;
1336 char *password = NULL; size_t passwordLen;
1337 char *new_password = NULL; size_t new_passwordLen;
1340 log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1341 keyfile ?: "[none]", new_keyfile ?: "[none]");
1343 if (!isLUKS(cd->type)) {
1344 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1348 r = keyslot_verify_or_find_empty(cd, &keyslot);
1352 if (!LUKS_keyslot_active_count(&cd->hdr)) {
1353 /* No slots used, try to use pre-generated key in header */
1354 if (cd->volume_key) {
1355 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1356 r = vk ? 0 : -ENOMEM;
1358 log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1362 /* Read password from file of (if NULL) from terminal */
1364 r = key_from_file(cd, _("Enter any passphrase: "),
1365 &password, &passwordLen,
1366 keyfile, keyfile_size);
1368 r = key_from_terminal(cd, _("Enter any passphrase: "),
1369 &password, &passwordLen, 0);
1373 r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, password, passwordLen,
1381 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1382 &new_password, &new_passwordLen, new_keyfile,
1385 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1386 &new_password, &new_passwordLen, 1);
1390 r = LUKS_set_key(mdata_device(cd), keyslot, new_password, new_passwordLen,
1391 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1393 crypt_safe_free(password);
1394 crypt_safe_free(new_password);
1395 crypt_free_volume_key(vk);
1396 return r < 0 ? r : keyslot;
1399 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1401 const char *volume_key,
1402 size_t volume_key_size,
1403 const char *passphrase,
1404 size_t passphrase_size)
1406 struct volume_key *vk = NULL;
1408 char *new_password = NULL; size_t new_passwordLen;
1410 log_dbg("Adding new keyslot %d using volume key.", keyslot);
1412 if (!isLUKS(cd->type)) {
1413 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1418 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1419 else if (cd->volume_key)
1420 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1425 r = LUKS_verify_volume_key(&cd->hdr, vk);
1427 log_err(cd, _("Volume key does not match the volume.\n"));
1431 r = keyslot_verify_or_find_empty(cd, &keyslot);
1436 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1437 &new_password, &new_passwordLen, 1);
1440 passphrase = new_password;
1441 passphrase_size = new_passwordLen;
1444 r = LUKS_set_key(mdata_device(cd), keyslot, passphrase, passphrase_size,
1445 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1447 crypt_safe_free(new_password);
1448 crypt_free_volume_key(vk);
1449 return (r < 0) ? r : keyslot;
1452 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1454 crypt_keyslot_info ki;
1456 log_dbg("Destroying keyslot %d.", keyslot);
1458 if (!isLUKS(cd->type)) {
1459 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1463 ki = crypt_keyslot_status(cd, keyslot);
1464 if (ki == CRYPT_SLOT_INVALID) {
1465 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1469 if (ki == CRYPT_SLOT_INACTIVE) {
1470 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1474 return LUKS_del_key(mdata_device(cd), keyslot, &cd->hdr, cd);
1477 // activation/deactivation of device mapping
1478 int crypt_activate_by_passphrase(struct crypt_device *cd,
1481 const char *passphrase,
1482 size_t passphrase_size,
1485 crypt_status_info ci;
1486 struct volume_key *vk = NULL;
1487 char *read_passphrase = NULL;
1488 size_t passphraseLen = 0;
1491 log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1492 name ? "Activating" : "Checking", name ?: "",
1493 keyslot, passphrase ? "" : "[none] ");
1496 ci = crypt_status(NULL, name);
1497 if (ci == CRYPT_INVALID)
1499 else if (ci >= CRYPT_ACTIVE) {
1500 log_err(cd, _("Device %s already exists.\n"), name);
1505 /* plain, use hashed passphrase */
1506 if (isPLAIN(cd->type)) {
1511 r = key_from_terminal(cd, NULL, &read_passphrase,
1515 passphrase = read_passphrase;
1516 passphrase_size = passphraseLen;
1519 r = process_key(cd, cd->plain_hdr.hash,
1520 cd->volume_key->keylength,
1521 passphrase, passphrase_size, &vk);
1525 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1527 } else if (isLUKS(cd->type)) {
1528 /* provided passphrase, do not retry */
1530 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
1531 passphrase_size, &cd->hdr, &vk, cd);
1533 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1538 r = LUKS1_activate(cd, name, vk, flags);
1543 crypt_safe_free(read_passphrase);
1544 crypt_free_volume_key(vk);
1546 return r < 0 ? r : keyslot;
1549 int crypt_activate_by_keyfile(struct crypt_device *cd,
1552 const char *keyfile,
1553 size_t keyfile_size,
1556 crypt_status_info ci;
1557 struct volume_key *vk = NULL;
1558 char *passphrase_read = NULL;
1559 size_t passphrase_size_read;
1560 unsigned int key_count = 0;
1563 log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1564 name ?: "", keyslot, keyfile ?: "[none]");
1567 ci = crypt_status(NULL, name);
1568 if (ci == CRYPT_INVALID)
1570 else if (ci >= CRYPT_ACTIVE) {
1571 log_err(cd, _("Device %s already exists.\n"), name);
1579 if (isPLAIN(cd->type)) {
1583 r = key_from_file(cd, _("Enter passphrase: "),
1584 &passphrase_read, &passphrase_size_read,
1585 keyfile, keyfile_size);
1589 r = process_key(cd, cd->plain_hdr.hash,
1590 cd->volume_key->keylength,
1591 passphrase_read, passphrase_size_read, &vk);
1595 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1596 } else if (isLUKS(cd->type)) {
1597 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1598 &passphrase_size_read, keyfile, keyfile_size);
1601 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
1602 passphrase_size_read, &cd->hdr, &vk, cd);
1608 r = LUKS1_activate(cd, name, vk, flags);
1613 } else if (isLOOPAES(cd->type)) {
1614 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
1615 keyfile, keyfile_size);
1618 r = LOOPAES_parse_keyfile(cd, &vk, cd->loopaes_hdr.hash, &key_count,
1619 passphrase_read, passphrase_size_read);
1623 r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
1624 key_count, vk, flags);
1629 crypt_safe_free(passphrase_read);
1630 crypt_free_volume_key(vk);
1635 int crypt_activate_by_volume_key(struct crypt_device *cd,
1637 const char *volume_key,
1638 size_t volume_key_size,
1641 crypt_status_info ci;
1642 struct volume_key *vk = NULL;
1645 log_dbg("Activating volume %s by volume key.", name);
1648 ci = crypt_status(NULL, name);
1649 if (ci == CRYPT_INVALID)
1651 else if (ci >= CRYPT_ACTIVE) {
1652 log_err(cd, _("Device %s already exists.\n"), name);
1657 /* use key directly, no hash */
1658 if (isPLAIN(cd->type)) {
1662 if (!volume_key || !volume_key_size || !cd->volume_key ||
1663 volume_key_size != cd->volume_key->keylength) {
1664 log_err(cd, _("Incorrect volume key specified for plain device.\n"));
1668 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1672 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1673 } else if (isLUKS(cd->type)) {
1674 /* If key is not provided, try to use internal key */
1676 if (!cd->volume_key) {
1677 log_err(cd, _("Volume key does not match the volume.\n"));
1680 volume_key_size = cd->volume_key->keylength;
1681 volume_key = cd->volume_key->key;
1684 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1687 r = LUKS_verify_volume_key(&cd->hdr, vk);
1690 log_err(cd, _("Volume key does not match the volume.\n"));
1693 r = LUKS1_activate(cd, name, vk, flags);
1695 log_err(cd, _("Device type is not properly initialised.\n"));
1697 crypt_free_volume_key(vk);
1702 int crypt_deactivate(struct crypt_device *cd, const char *name)
1709 log_dbg("Deactivating volume %s.", name);
1711 if (!cd && dm_init(NULL, 1) < 0)
1714 switch (crypt_status(cd, name)) {
1716 r = dm_remove_device(name, 0, 0);
1719 log_err(cd, _("Device %s is busy.\n"), name);
1722 case CRYPT_INACTIVE:
1723 log_err(cd, _("Device %s is not active.\n"), name);
1727 log_err(cd, _("Invalid device %s.\n"), name);
1737 int crypt_volume_key_get(struct crypt_device *cd,
1740 size_t *volume_key_size,
1741 const char *passphrase,
1742 size_t passphrase_size)
1744 struct volume_key *vk = NULL;
1748 key_len = crypt_get_volume_key_size(cd);
1749 if (key_len > *volume_key_size) {
1750 log_err(cd, _("Volume key buffer too small.\n"));
1754 if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
1755 r = process_key(cd, cd->plain_hdr.hash, key_len,
1756 passphrase, passphrase_size, &vk);
1758 log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
1759 } else if (isLUKS(cd->type)) {
1760 r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
1761 passphrase_size, &cd->hdr, &vk, cd);
1764 log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
1767 memcpy(volume_key, vk->key, vk->keylength);
1768 *volume_key_size = vk->keylength;
1771 crypt_free_volume_key(vk);
1775 int crypt_volume_key_verify(struct crypt_device *cd,
1776 const char *volume_key,
1777 size_t volume_key_size)
1779 struct volume_key *vk;
1782 if (!isLUKS(cd->type)) {
1783 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1787 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1791 r = LUKS_verify_volume_key(&cd->hdr, vk);
1794 log_err(cd, _("Volume key does not match the volume.\n"));
1796 crypt_free_volume_key(vk);
1801 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
1803 log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
1804 cd->timeout = timeout_sec;
1807 void crypt_set_password_retry(struct crypt_device *cd, int tries)
1809 log_dbg("Password retry count set to %d.", tries);
1813 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
1815 log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
1816 cd->iteration_time = iteration_time_ms;
1819 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
1821 log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
1822 cd->password_verify = password_verify ? 1 : 0;
1825 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
1828 case CRYPT_RNG_URANDOM:
1829 case CRYPT_RNG_RANDOM:
1830 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
1831 cd->rng_type = rng_type;
1835 int crypt_get_rng_type(struct crypt_device *cd)
1840 return cd->rng_type;
1843 int crypt_memory_lock(struct crypt_device *cd, int lock)
1845 return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
1849 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
1853 if (!cd && dm_init(NULL, 1) < 0)
1854 return CRYPT_INVALID;
1856 r = dm_status_device(name);
1861 if (r < 0 && r != -ENODEV)
1862 return CRYPT_INVALID;
1865 return CRYPT_ACTIVE;
1870 return CRYPT_INACTIVE;
1873 static void hexprintICB(struct crypt_device *cd, char *d, int n)
1876 for(i = 0; i < n; i++)
1877 log_std(cd, "%02hhx ", (char)d[i]);
1880 int crypt_dump(struct crypt_device *cd)
1883 if (!isLUKS(cd->type)) { //FIXME
1884 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1888 log_std(cd, "LUKS header information for %s\n\n", mdata_device(cd));
1889 log_std(cd, "Version: \t%d\n", cd->hdr.version);
1890 log_std(cd, "Cipher name: \t%s\n", cd->hdr.cipherName);
1891 log_std(cd, "Cipher mode: \t%s\n", cd->hdr.cipherMode);
1892 log_std(cd, "Hash spec: \t%s\n", cd->hdr.hashSpec);
1893 log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
1894 log_std(cd, "MK bits: \t%d\n", cd->hdr.keyBytes * 8);
1895 log_std(cd, "MK digest: \t");
1896 hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
1898 log_std(cd, "MK salt: \t");
1899 hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
1900 log_std(cd, "\n \t");
1901 hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1903 log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
1904 log_std(cd, "UUID: \t%s\n\n", cd->hdr.uuid);
1905 for(i = 0; i < LUKS_NUMKEYS; i++) {
1906 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
1907 log_std(cd, "Key Slot %d: ENABLED\n",i);
1908 log_std(cd, "\tIterations: \t%d\n",
1909 cd->hdr.keyblock[i].passwordIterations);
1910 log_std(cd, "\tSalt: \t");
1911 hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
1913 log_std(cd, "\n\t \t");
1914 hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
1915 LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1918 log_std(cd, "\tKey material offset:\t%d\n",
1919 cd->hdr.keyblock[i].keyMaterialOffset);
1920 log_std(cd, "\tAF stripes: \t%d\n",
1921 cd->hdr.keyblock[i].stripes);
1924 log_std(cd, "Key Slot %d: DISABLED\n", i);
1930 const char *crypt_get_cipher(struct crypt_device *cd)
1932 if (isPLAIN(cd->type))
1933 return cd->plain_cipher;
1935 if (isLUKS(cd->type))
1936 return cd->hdr.cipherName;
1938 if (isLOOPAES(cd->type))
1939 return cd->loopaes_cipher;
1944 const char *crypt_get_cipher_mode(struct crypt_device *cd)
1946 if (isPLAIN(cd->type))
1947 return cd->plain_cipher_mode;
1949 if (isLUKS(cd->type))
1950 return cd->hdr.cipherMode;
1952 if (isLOOPAES(cd->type))
1953 return cd->loopaes_cipher_mode;
1958 const char *crypt_get_uuid(struct crypt_device *cd)
1960 if (isLUKS(cd->type))
1961 return cd->hdr.uuid;
1963 if (isPLAIN(cd->type))
1964 return cd->plain_uuid;
1966 if (isLOOPAES(cd->type))
1967 return cd->loopaes_uuid;
1972 const char *crypt_get_device_name(struct crypt_device *cd)
1978 int crypt_get_volume_key_size(struct crypt_device *cd)
1980 if (isPLAIN(cd->type) && cd->volume_key)
1981 return cd->volume_key->keylength;
1983 if (isLUKS(cd->type))
1984 return cd->hdr.keyBytes;
1986 if (isLOOPAES(cd->type))
1987 return cd->loopaes_key_size;
1992 uint64_t crypt_get_data_offset(struct crypt_device *cd)
1994 if (isPLAIN(cd->type))
1995 return cd->plain_hdr.offset;
1997 if (isLUKS(cd->type))
1998 return cd->hdr.payloadOffset;
2000 if (isLOOPAES(cd->type))
2001 return cd->loopaes_hdr.offset;
2006 uint64_t crypt_get_iv_offset(struct crypt_device *cd)
2008 if (isPLAIN(cd->type))
2009 return cd->plain_hdr.skip;
2011 if (isLUKS(cd->type))
2014 if (isLOOPAES(cd->type))
2015 return cd->loopaes_hdr.skip;
2020 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2022 if (!isLUKS(cd->type)) {
2023 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2024 return CRYPT_SLOT_INVALID;
2027 return LUKS_keyslot_info(&cd->hdr, keyslot);
2030 int crypt_keyslot_max(const char *type)
2032 if (type && isLUKS(type))
2033 return LUKS_NUMKEYS;
2038 const char *crypt_get_type(struct crypt_device *cd)
2043 int crypt_get_active_device(struct crypt_device *cd __attribute__((unused)),
2045 struct crypt_active_device *cad)
2047 struct crypt_dm_active_device dmd;
2050 r = dm_query_device(name, 0, &dmd);
2054 cad->offset = dmd.offset;
2055 cad->iv_offset = dmd.iv_offset;
2056 cad->size = dmd.size;
2057 cad->flags = dmd.flags;