2 * crypt_reencrypt - crypt utility for offline reencryption
4 * Copyright (C) 2012 Milan Broz All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #define _LARGEFILE64_SOURCE
21 #define _FILE_OFFSET_BITS 64
22 #define SECTOR_SIZE 512
33 #include <sys/ioctl.h>
40 #include "cryptsetup.h"
42 static int opt_verbose = 0;
43 static int opt_debug = 0;
44 static const char *opt_cipher = NULL;
45 static const char *opt_hash = NULL;
46 static const char *opt_key_file = NULL;
47 static long opt_keyfile_size = 0;
48 static long opt_keyfile_offset = 0;
49 static int opt_iteration_time = 1000;
50 static int opt_batch_mode = 0;
51 static int opt_version_mode = 0;
52 static int opt_random = 0;
53 static int opt_urandom = 0;
54 static int opt_bsize = 4;
55 static int opt_directio = 0;
56 static int opt_write_log = 0;
57 static int opt_tries = 3;
58 static int opt_key_slot = CRYPT_ANY_SLOT;
60 static const char **action_argv;
62 static volatile int quit = 0;
69 uint64_t device_offset;
70 uint64_t device_shift;
73 enum { FORWARD = 0, BACKWARD = 1 } reencrypt_direction;
75 char header_file_org[PATH_MAX];
76 char header_file_new[PATH_MAX];
77 char log_file[PATH_MAX];
79 char crypt_path_org[PATH_MAX];
80 char crypt_path_new[PATH_MAX];
89 struct timeval start_time, end_time;
90 uint64_t restart_bytes;
93 char MAGIC[] = {'L','U','K','S', 0xba, 0xbe};
94 char NOMAGIC[] = {'L','U','K','S', 0xde, 0xad};
103 __attribute__((format(printf, 5, 6)))
104 static void clogger(struct crypt_device *cd, int level, const char *file,
105 int line, const char *format, ...)
110 va_start(argp, format);
112 if (vasprintf(&target, format, argp) > 0) {
114 crypt_log(cd, level, target);
115 } else if (opt_debug)
116 printf("# %s\n", target);
123 static void _log(int level, const char *msg, void *usrptr __attribute__((unused)))
127 case CRYPT_LOG_NORMAL:
130 case CRYPT_LOG_VERBOSE:
134 case CRYPT_LOG_ERROR:
137 case CRYPT_LOG_DEBUG:
139 printf("# %s\n", msg);
142 fprintf(stderr, "Internal error on logging class for msg: %s", msg);
147 static void _quiet_log(int level, const char *msg, void *usrptr)
149 if (!opt_verbose && (level == CRYPT_LOG_ERROR || level == CRYPT_LOG_NORMAL))
150 level = CRYPT_LOG_VERBOSE;
151 _log(level, msg, usrptr);
154 static void int_handler(int sig __attribute__((__unused__)))
159 static void set_int_block(int block)
161 sigset_t signals_open;
163 sigemptyset(&signals_open);
164 sigaddset(&signals_open, SIGINT);
165 sigaddset(&signals_open, SIGTERM);
166 sigprocmask(block ? SIG_SETMASK : SIG_UNBLOCK, &signals_open, NULL);
169 static void set_int_handler(void)
171 struct sigaction sigaction_open;
173 memset(&sigaction_open, 0, sizeof(struct sigaction));
174 sigaction_open.sa_handler = int_handler;
175 sigaction(SIGINT, &sigaction_open, 0);
176 sigaction(SIGTERM, &sigaction_open, 0);
180 /* The difference in seconds between two times in "timeval" format. */
181 static double time_diff(struct timeval start, struct timeval end)
183 return (end.tv_sec - start.tv_sec)
184 + (end.tv_usec - start.tv_usec) / 1E6;
187 static int alignment(int fd)
191 alignment = fpathconf(fd, _PC_REC_XFER_ALIGN);
197 static int device_magic(struct reenc_ctx *rc, header_magic set_magic)
203 devfd = open(rc->device, O_RDWR | O_DIRECT);
205 return errno == EBUSY ? -EBUSY : -EINVAL;
207 if (posix_memalign((void *)&buf, alignment(devfd), SECTOR_SIZE)) {
208 log_err(_("Allocation of aligned memory failed.\n"));
213 s = read(devfd, buf, SECTOR_SIZE);
214 if (s < 0 || s != SECTOR_SIZE) {
215 log_err(_("Cannot read device %s.\n"), rc->device);
220 if (set_magic == MAKE_UNUSABLE && !memcmp(buf, MAGIC, MAGIC_L)) {
221 log_verbose(_("Marking LUKS device %s unusable.\n"), rc->device);
222 memcpy(buf, NOMAGIC, MAGIC_L);
225 } else if (set_magic == MAKE_USABLE && !memcmp(buf, NOMAGIC, MAGIC_L)) {
226 log_verbose(_("Marking LUKS device %s usable.\n"), rc->device);
227 memcpy(buf, MAGIC, MAGIC_L);
229 } else if (set_magic == CHECK_UNUSABLE) {
230 r = memcmp(buf, NOMAGIC, MAGIC_L) ? -EINVAL : 0;
232 rc->device_uuid = strndup(&buf[0xa8], 40);
238 if (lseek(devfd, 0, SEEK_SET) == -1)
240 s = write(devfd, buf, SECTOR_SIZE);
241 if (s < 0 || s != SECTOR_SIZE) {
242 log_err(_("Cannot write device %s.\n"), rc->device);
246 log_dbg("LUKS signature check failed for %s.", rc->device);
249 memset(buf, 0, SECTOR_SIZE);
255 static int create_empty_header(const char *new_file, const char *old_file)
262 if (stat(old_file, &st) == -1 ||
263 (st.st_mode & S_IFMT) != S_IFREG ||
264 (st.st_size > 16 * 1024 * 1024))
268 log_dbg("Creating empty file %s of size %lu.", new_file, (unsigned long)size);
270 if (!(buf = malloc(size)))
272 memset(buf, 0, size);
274 fd = creat(new_file, S_IRUSR|S_IWUSR);
280 if (write(fd, buf, size) < size)
288 static int write_log(struct reenc_ctx *rc)
290 static char buf[SECTOR_SIZE];
293 memset(buf, 0, SECTOR_SIZE);
294 snprintf(buf, SECTOR_SIZE, "# LUKS reencryption log, DO NOT EDIT OR DELETE.\n"
295 "version = %d\nUUID = %s\ndirection = %d\n"
296 "offset = %" PRIu64 "\nshift = %" PRIu64 "\n# EOF\n",
297 1, rc->device_uuid, rc->reencrypt_direction,
298 rc->device_offset, rc->device_shift);
300 lseek(rc->log_fd, 0, SEEK_SET);
301 r = write(rc->log_fd, buf, SECTOR_SIZE);
302 if (r < 0 || r != SECTOR_SIZE) {
303 log_err(_("Cannot write reencryption log file.\n"));
310 static int parse_line_log(struct reenc_ctx *rc, const char *line)
316 /* whole line is comment */
320 if (sscanf(line, "version = %d", &i) == 1) {
322 log_dbg("Log: Unexpected version = %i", i);
325 } else if (sscanf(line, "UUID = %40s", s) == 1) {
326 if (!rc->device_uuid || strcmp(rc->device_uuid, s)) {
327 log_dbg("Log: Unexpected UUID %s", s);
330 } else if (sscanf(line, "direction = %d", &i) == 1) {
331 log_dbg("Log: direction = %i", i);
332 rc->reencrypt_direction = i;
333 } else if (sscanf(line, "offset = %" PRIu64, &u64) == 1) {
334 log_dbg("Log: offset = %" PRIu64, u64);
335 rc->device_offset = u64;
336 } else if (sscanf(line, "shift = %" PRIu64, &u64) == 1) {
337 log_dbg("Log: shift = %" PRIu64, u64);
338 rc->device_shift = u64;
345 static int parse_log(struct reenc_ctx *rc)
347 static char buf[SECTOR_SIZE];
351 s = read(rc->log_fd, buf, SECTOR_SIZE);
353 log_err(_("Cannot read reencryption log file.\n"));
357 buf[SECTOR_SIZE - 1] = '\0';
360 end = strchr(start, '\n');
363 if (parse_line_log(rc, start)) {
364 log_err("Wrong log format.\n");
375 static int open_log(struct reenc_ctx *rc)
380 if(stat(rc->log_file, &st) < 0) {
381 log_dbg("Creating LUKS reencryption log file %s.", rc->log_file);
382 flags = opt_directio ? O_RDWR|O_CREAT|O_DIRECT : O_RDWR|O_CREAT;
383 rc->log_fd = open(rc->log_file, flags, S_IRUSR|S_IWUSR);
384 if (rc->log_fd == -1)
386 if (write_log(rc) < 0)
389 log_dbg("Log file %s exists, restarting.", rc->log_file);
390 flags = opt_directio ? O_RDWR|O_DIRECT : O_RDWR;
391 rc->log_fd = open(rc->log_file, flags);
392 if (rc->log_fd == -1)
397 /* Be sure it is correct format */
398 return parse_log(rc);
401 static void close_log(struct reenc_ctx *rc)
403 log_dbg("Closing LUKS reencryption log file %s.", rc->log_file);
404 if (rc->log_fd != -1)
408 static int activate_luks_headers(struct reenc_ctx *rc)
410 struct crypt_device *cd = NULL, *cd_new = NULL;
413 log_dbg("Activating LUKS devices from headers.");
415 if ((r = crypt_init(&cd, rc->header_file_org)) ||
416 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
417 (r = crypt_set_data_device(cd, rc->device)))
420 if ((r = crypt_activate_by_passphrase(cd, rc->header_file_org,
421 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
422 CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
425 if ((r = crypt_init(&cd_new, rc->header_file_new)) ||
426 (r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
427 (r = crypt_set_data_device(cd_new, rc->device)))
430 if ((r = crypt_activate_by_passphrase(cd_new, rc->header_file_new,
431 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
432 CRYPT_ACTIVATE_SHARED|CRYPT_ACTIVATE_PRIVATE)) < 0)
439 log_err(_("Activation of temporary devices failed.\n"));
443 static int backup_luks_headers(struct reenc_ctx *rc)
445 struct crypt_device *cd = NULL, *cd_new = NULL;
446 struct crypt_params_luks1 params = {0};
447 char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
450 log_dbg("Creating LUKS header backup for device %s.", rc->device);
452 if ((r = crypt_init(&cd, rc->device)) ||
453 (r = crypt_load(cd, CRYPT_LUKS1, NULL)))
456 crypt_set_confirm_callback(cd, NULL, NULL);
457 if ((r = crypt_header_backup(cd, CRYPT_LUKS1, rc->header_file_org)))
459 log_verbose(_("LUKS header backup of device %s created.\n"), rc->device);
461 if ((r = create_empty_header(rc->header_file_new, rc->header_file_org)))
464 params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
465 params.data_alignment = crypt_get_data_offset(cd);
466 params.data_device = rc->device;
468 if ((r = crypt_init(&cd_new, rc->header_file_new)))
472 crypt_set_rng_type(cd_new, CRYPT_RNG_RANDOM);
473 else if (opt_urandom)
474 crypt_set_rng_type(cd_new, CRYPT_RNG_URANDOM);
476 if (opt_iteration_time)
477 crypt_set_iteration_time(cd_new, opt_iteration_time);
480 r = crypt_parse_name_and_mode(opt_cipher, cipher, NULL, cipher_mode);
482 log_err(_("No known cipher specification pattern detected.\n"));
487 if ((r = crypt_format(cd_new, CRYPT_LUKS1,
488 opt_cipher ? cipher : crypt_get_cipher(cd),
489 opt_cipher ? cipher_mode : crypt_get_cipher_mode(cd),
491 NULL, crypt_get_volume_key_size(cd), ¶ms)))
493 log_verbose(_("New LUKS header for device %s created.\n"), rc->device);
495 for (i = 0; i < MAX_SLOT; i++) {
496 if (!rc->p[i].password)
498 if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
499 NULL, 0, rc->p[i].password, rc->p[i].passwordLen)) < 0)
501 log_verbose(_("Activated keyslot %i.\n"), r);
508 log_err(_("Creation of LUKS backup headers failed.\n"));
512 static void remove_headers(struct reenc_ctx *rc)
514 struct crypt_device *cd = NULL;
516 log_dbg("Removing headers.");
518 if (crypt_init(&cd, NULL))
520 crypt_set_log_callback(cd, _quiet_log, NULL);
521 (void)crypt_deactivate(cd, rc->header_file_org);
522 (void)crypt_deactivate(cd, rc->header_file_new);
526 static int restore_luks_header(struct reenc_ctx *rc)
528 struct crypt_device *cd = NULL;
531 log_dbg("Restoring header for %s from %s.", rc->device, rc->header_file_new);
533 r = crypt_init(&cd, rc->device);
535 crypt_set_confirm_callback(cd, NULL, NULL);
536 r = crypt_header_restore(cd, CRYPT_LUKS1, rc->header_file_new);
541 log_err(_("Cannot restore LUKS header on device %s.\n"), rc->device);
543 log_verbose(_("LUKS header on device %s restored.\n"), rc->device);
547 static void print_progress(struct reenc_ctx *rc, uint64_t bytes, int final)
549 uint64_t mbytes = (bytes - rc->restart_bytes) / 1024 / 1024;
550 struct timeval now_time;
553 gettimeofday(&now_time, NULL);
554 if (!final && time_diff(rc->end_time, now_time) < 0.5)
557 rc->end_time = now_time;
562 tdiff = time_diff(rc->start_time, rc->end_time);
566 /* vt100 code clear line */
568 log_err(_("Progress: %5.1f%%, time elapsed %3.1f seconds, "
569 "%4llu MiB written, speed %5.1f MiB/s%s"),
570 (double)bytes / rc->device_size * 100,
571 time_diff(rc->start_time, rc->end_time),
572 (unsigned long long)mbytes, (double)(mbytes) / tdiff,
576 static int copy_data_forward(struct reenc_ctx *rc, int fd_old, int fd_new,
577 size_t block_size, void *buf, uint64_t *bytes)
581 log_dbg("Reencrypting in forward direction.");
583 if (lseek64(fd_old, rc->device_offset, SEEK_SET) < 0 ||
584 lseek64(fd_new, rc->device_offset, SEEK_SET) < 0) {
585 log_err(_("Cannot seek to device offset.\n"));
589 rc->restart_bytes = *bytes = rc->device_offset;
591 if (write_log(rc) < 0)
594 while (!quit && rc->device_offset < rc->device_size) {
595 s1 = read(fd_old, buf, block_size);
596 if (s1 < 0 || ((size_t)s1 != block_size &&
597 (rc->device_offset + s1) != rc->device_size)) {
598 log_dbg("Read error, expecting %d, got %d.",
599 (int)block_size, (int)s1);
602 s2 = write(fd_new, buf, s1);
604 log_dbg("Write error, expecting %d, got %d.",
605 (int)block_size, (int)s2);
608 rc->device_offset += s1;
609 if (opt_write_log && write_log(rc) < 0)
612 *bytes += (uint64_t)s2;
613 print_progress(rc, *bytes, 0);
616 return quit ? -EAGAIN : 0;
619 static int copy_data_backward(struct reenc_ctx *rc, int fd_old, int fd_new,
620 size_t block_size, void *buf, uint64_t *bytes)
622 ssize_t s1, s2, working_block;
623 off64_t working_offset;
625 log_dbg("Reencrypting in backward direction.");
627 if (!rc->in_progress) {
628 rc->device_offset = rc->device_size;
629 rc->restart_bytes = 0;
632 rc->restart_bytes = rc->device_size - rc->device_offset;
633 *bytes = rc->restart_bytes;
636 if (write_log(rc) < 0)
639 while (!quit && rc->device_offset) {
640 if (rc->device_offset < block_size) {
642 working_block = rc->device_offset;
644 working_offset = rc->device_offset - block_size;
645 working_block = block_size;
648 if (lseek64(fd_old, working_offset, SEEK_SET) < 0 ||
649 lseek64(fd_new, working_offset, SEEK_SET) < 0) {
650 log_err(_("Cannot seek to device offset.\n"));
654 s1 = read(fd_old, buf, working_block);
655 if (s1 < 0 || (s1 != working_block)) {
656 log_dbg("Read error, expecting %d, got %d.",
657 (int)block_size, (int)s1);
660 s2 = write(fd_new, buf, working_block);
662 log_dbg("Write error, expecting %d, got %d.",
663 (int)block_size, (int)s2);
666 rc->device_offset -= s1;
667 if (opt_write_log && write_log(rc) < 0)
670 *bytes += (uint64_t)s2;
671 print_progress(rc, *bytes, 0);
674 return quit ? -EAGAIN : 0;
677 static int copy_data(struct reenc_ctx *rc)
679 size_t block_size = opt_bsize * 1024 * 1024;
680 int fd_old = -1, fd_new = -1;
685 log_dbg("Data copy preparation.");
687 fd_old = open(rc->crypt_path_org, O_RDONLY | (opt_directio ? O_DIRECT : 0));
689 log_err(_("Cannot open temporary LUKS header file.\n"));
693 fd_new = open(rc->crypt_path_new, O_WRONLY | (opt_directio ? O_DIRECT : 0));
695 log_err(_("Cannot open temporary LUKS header file.\n"));
700 if (ioctl(fd_old, BLKGETSIZE64, &rc->device_size) < 0) {
701 log_err(_("Cannot get device size.\n"));
705 if (posix_memalign((void *)&buf, alignment(fd_new), block_size)) {
706 log_err(_("Allocation of aligned memory failed.\n"));
712 gettimeofday(&rc->start_time, NULL);
714 if (rc->reencrypt_direction == FORWARD)
715 r = copy_data_forward(rc, fd_old, fd_new, block_size, buf, &bytes);
717 r = copy_data_backward(rc, fd_old, fd_new, block_size, buf, &bytes);
720 print_progress(rc, bytes, 1);
723 log_err(_("Interrupted by a signal.\n"));
725 log_err(_("IO error during reencryption.\n"));
737 static int initialize_uuid(struct reenc_ctx *rc)
739 struct crypt_device *cd = NULL;
742 log_dbg("Initialising UUID.");
744 /* Try to load LUKS from device */
745 if ((r = crypt_init(&cd, rc->device)))
747 crypt_set_log_callback(cd, _quiet_log, NULL);
748 r = crypt_load(cd, CRYPT_LUKS1, NULL);
750 rc->device_uuid = strdup(crypt_get_uuid(cd));
752 /* Reencryption already in progress - magic header? */
753 r = device_magic(rc, CHECK_UNUSABLE);
759 static int init_passphrase1(struct reenc_ctx *rc, struct crypt_device *cd,
760 const char *msg, int slot_check)
762 int r = -EINVAL, slot, retry_count;
764 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
766 retry_count = opt_tries ?: 1;
767 while (retry_count--) {
768 r = crypt_get_key(msg, &rc->p[slot].password,
769 &rc->p[slot].passwordLen,
770 0, 0, NULL /*opt_key_file*/,
775 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
776 rc->p[slot].password, rc->p[slot].passwordLen, 0);
779 crypt_safe_free(rc->p[slot].password);
780 rc->p[slot].password = NULL;
781 rc->p[slot].passwordLen = 0;
783 if (r < 0 && r != -EPERM)
789 log_err(_("No key available with this passphrase.\n"));
794 static int init_keyfile(struct reenc_ctx *rc, struct crypt_device *cd, int slot_check)
798 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
799 r = crypt_get_key(NULL, &rc->p[slot].password, &rc->p[slot].passwordLen,
800 opt_keyfile_offset, opt_keyfile_size, opt_key_file, 0, 0, cd);
804 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
805 rc->p[slot].password, rc->p[slot].passwordLen, 0);
808 * Allow keyslot only if it is last slot or if user explicitly
809 * specify whch slot to use (IOW others will be disabled).
811 if (r >= 0 && opt_key_slot == CRYPT_ANY_SLOT &&
812 crypt_keyslot_status(cd, r) != CRYPT_SLOT_ACTIVE_LAST) {
813 log_err(_("Key file can be used only with --key-slot or with "
814 "exactly one key slot active.\n"));
819 crypt_safe_free(rc->p[slot].password);
820 rc->p[slot].password = NULL;
821 rc->p[slot].passwordLen = 0;
823 log_err(_("No key available with this passphrase.\n"));
831 static int initialize_passphrase(struct reenc_ctx *rc, const char *device)
833 struct crypt_device *cd = NULL;
834 crypt_keyslot_info ki;
838 log_dbg("Passhrases initialization.");
840 if ((r = crypt_init(&cd, device)) ||
841 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
842 (r = crypt_set_data_device(cd, rc->device))) {
848 r = init_keyfile(rc, cd, opt_key_slot);
849 } else if (rc->in_progress) {
850 r = init_passphrase1(rc, cd, _("Enter any LUKS passphrase: "), CRYPT_ANY_SLOT);
851 } else for (i = 0; i < MAX_SLOT; i++) {
852 ki = crypt_keyslot_status(cd, i);
853 if (ki != CRYPT_SLOT_ACTIVE && ki != CRYPT_SLOT_ACTIVE_LAST)
856 snprintf(msg, sizeof(msg), _("Enter LUKS passphrase for key slot %u: "), i);
857 r = init_passphrase1(rc, cd, msg, i);
863 return r > 0 ? 0 : r;
866 static int initialize_context(struct reenc_ctx *rc, const char *device)
868 log_dbg("Initialising reencryption context.");
872 if (!(rc->device = strndup(device, PATH_MAX)))
875 if (initialize_uuid(rc)) {
876 log_err(_("Device %s is not a valid LUKS device.\n"), device);
880 /* Prepare device names */
881 if (snprintf(rc->log_file, PATH_MAX,
882 "LUKS-%s.log", rc->device_uuid) < 0)
884 if (snprintf(rc->header_file_org, PATH_MAX,
885 "LUKS-%s.org", rc->device_uuid) < 0)
887 if (snprintf(rc->header_file_new, PATH_MAX,
888 "LUKS-%s.new", rc->device_uuid) < 0)
891 /* Paths to encrypted devices */
892 if (snprintf(rc->crypt_path_org, PATH_MAX,
893 "%s/%s", crypt_get_dir(), rc->header_file_org) < 0)
895 if (snprintf(rc->crypt_path_new, PATH_MAX,
896 "%s/%s", crypt_get_dir(), rc->header_file_new) < 0)
901 if (open_log(rc) < 0) {
902 log_err(_("Cannot open reencryption log file.\n"));
906 if (!rc->in_progress) {
908 rc->reencrypt_direction = FORWARD;
910 rc->reencrypt_direction = BACKWARD;
911 rc->device_offset = (uint64_t)~0;
918 static void destroy_context(struct reenc_ctx *rc)
922 log_dbg("Destroying reencryption context.");
927 if ((rc->reencrypt_direction == FORWARD &&
928 rc->device_offset == rc->device_size) ||
929 rc->device_offset == 0) {
930 unlink(rc->log_file);
931 unlink(rc->header_file_org);
932 unlink(rc->header_file_new);
935 for (i = 0; i < MAX_SLOT; i++)
936 crypt_safe_free(rc->p[i].password);
939 free(rc->device_uuid);
942 static int run_reencrypt(const char *device)
945 struct reenc_ctx rc = {};
947 if (initialize_context(&rc, device))
950 log_dbg("Running reencryption.");
952 if (!rc.in_progress) {
953 if ((r = initialize_passphrase(&rc, rc.device)) ||
954 (r = backup_luks_headers(&rc)) ||
955 (r = device_magic(&rc, MAKE_UNUSABLE)))
958 if ((r = initialize_passphrase(&rc, rc.header_file_new)))
962 if ((r = activate_luks_headers(&rc)))
965 if ((r = copy_data(&rc)))
968 r = restore_luks_header(&rc);
970 destroy_context(&rc);
974 static __attribute__ ((noreturn)) void usage(poptContext popt_context,
975 int exitcode, const char *error,
978 poptPrintUsage(popt_context, stderr, 0);
980 log_err("%s: %s\n", more, error);
981 poptFreeContext(popt_context);
985 static void help(poptContext popt_context,
986 enum poptCallbackReason reason __attribute__((unused)),
987 struct poptOption *key,
988 const char *arg __attribute__((unused)),
989 void *data __attribute__((unused)))
991 usage(popt_context, EXIT_SUCCESS, NULL, NULL);
994 static void _dbg_version_and_cmd(int argc, const char **argv)
998 log_std("# %s %s processing \"", PACKAGE_NAME, PACKAGE_VERSION);
999 for (i = 0; i < argc; i++) {
1002 log_std("%s", argv[i]);
1007 int main(int argc, const char **argv)
1009 static struct poptOption popt_help_options[] = {
1010 { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL },
1011 { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL },
1012 { "usage", '\0', POPT_ARG_NONE, NULL, 0, N_("Display brief usage"), NULL },
1015 static struct poptOption popt_options[] = {
1016 { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL },
1017 { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL },
1018 { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL },
1019 { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL },
1020 { "block-size", 'B', POPT_ARG_INT, &opt_bsize, 0, N_("Reencryption block size"), N_("MiB") },
1021 { "cipher", 'c', POPT_ARG_STRING, &opt_cipher, 0, N_("The cipher used to encrypt the disk (see /proc/crypto)"), NULL },
1022 { "hash", 'h', POPT_ARG_STRING, &opt_hash, 0, N_("The hash used to create the encryption key from the passphrase"), NULL },
1023 { "key-file", 'd', POPT_ARG_STRING, &opt_key_file, 0, N_("Read the key from a file."), NULL },
1024 { "iter-time", 'i', POPT_ARG_INT, &opt_iteration_time, 0, N_("PBKDF2 iteration time for LUKS (in ms)"), N_("msecs") },
1025 { "batch-mode", 'q', POPT_ARG_NONE, &opt_batch_mode, 0, N_("Do not ask for confirmation"), NULL },
1026 { "tries", 'T', POPT_ARG_INT, &opt_tries, 0, N_("How often the input of the passphrase can be retried"), NULL },
1027 { "use-random", '\0', POPT_ARG_NONE, &opt_random, 0, N_("Use /dev/random for generating volume key."), NULL },
1028 { "use-urandom", '\0', POPT_ARG_NONE, &opt_urandom, 0, N_("Use /dev/urandom for generating volume key."), NULL },
1029 { "use-directio", '\0', POPT_ARG_NONE, &opt_directio, 0, N_("Use direct-io when accesing devices."), NULL },
1030 { "write-log", '\0', POPT_ARG_NONE, &opt_write_log, 0, N_("Update log file after every block."), NULL },
1031 { "key-slot", 'S', POPT_ARG_INT, &opt_key_slot, 0, N_("Use only this slot (others will be disabled)."), NULL },
1032 { "keyfile-offset", '\0', POPT_ARG_LONG, &opt_keyfile_offset, 0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
1033 { "keyfile-size", 'l', POPT_ARG_LONG, &opt_keyfile_size, 0, N_("Limits the read from keyfile"), N_("bytes") },
1036 poptContext popt_context;
1039 crypt_set_log_callback(NULL, _log, NULL);
1043 setlocale(LC_ALL, "");
1044 bindtextdomain(PACKAGE, LOCALEDIR);
1045 textdomain(PACKAGE);
1047 popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
1048 poptSetOtherOptionHelp(popt_context,
1049 N_("[OPTION...] <device>]"));
1051 while((r = poptGetNextOpt(popt_context)) > 0) {
1057 usage(popt_context, EXIT_FAILURE, poptStrerror(r),
1058 poptBadOption(popt_context, POPT_BADOPTION_NOALIAS));
1059 if (opt_version_mode) {
1060 log_std("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
1061 poptFreeContext(popt_context);
1065 if (!opt_batch_mode)
1066 log_err(_("WARNING: this is experimental code, it can completely break your data.\n"));
1068 action_argv = poptGetArgs(popt_context);
1070 usage(popt_context, EXIT_FAILURE, _("Argument required."),
1071 poptGetInvocationName(popt_context));
1073 if (opt_random && opt_urandom)
1074 usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
1075 poptGetInvocationName(popt_context));
1077 if (opt_bsize < 1 || opt_bsize > 64)
1078 usage(popt_context, EXIT_FAILURE,
1079 _("Only values between 1MiB and 64 MiB allowed for reencryption block size."),
1080 poptGetInvocationName(popt_context));
1084 crypt_set_debug_level(-1);
1085 _dbg_version_and_cmd(argc, argv);
1088 r = run_reencrypt(action_argv[0]);
1090 poptFreeContext(popt_context);
1092 /* Translate exit code to simple codes */
1094 case 0: r = EXIT_SUCCESS; break;
1096 case -EBUSY: r = 5; break;
1098 case -ENODEV: r = 4; break;
1099 case -ENOMEM: r = 3; break;
1100 case -EPERM: r = 2; break;
1105 default: r = EXIT_FAILURE;