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];
90 struct timeval start_time, end_time;
91 uint64_t restart_bytes;
94 char MAGIC[] = {'L','U','K','S', 0xba, 0xbe};
95 char NOMAGIC[] = {'L','U','K','S', 0xde, 0xad};
104 __attribute__((format(printf, 5, 6)))
105 static void clogger(struct crypt_device *cd, int level, const char *file,
106 int line, const char *format, ...)
111 va_start(argp, format);
113 if (vasprintf(&target, format, argp) > 0) {
115 crypt_log(cd, level, target);
116 } else if (opt_debug)
117 printf("# %s\n", target);
124 static void _log(int level, const char *msg, void *usrptr __attribute__((unused)))
128 case CRYPT_LOG_NORMAL:
131 case CRYPT_LOG_VERBOSE:
135 case CRYPT_LOG_ERROR:
138 case CRYPT_LOG_DEBUG:
140 printf("# %s\n", msg);
143 fprintf(stderr, "Internal error on logging class for msg: %s", msg);
148 static void _quiet_log(int level, const char *msg, void *usrptr)
150 if (!opt_verbose && (level == CRYPT_LOG_ERROR || level == CRYPT_LOG_NORMAL))
151 level = CRYPT_LOG_VERBOSE;
152 _log(level, msg, usrptr);
155 static void int_handler(int sig __attribute__((__unused__)))
160 static void set_int_block(int block)
162 sigset_t signals_open;
164 sigemptyset(&signals_open);
165 sigaddset(&signals_open, SIGINT);
166 sigaddset(&signals_open, SIGTERM);
167 sigprocmask(block ? SIG_SETMASK : SIG_UNBLOCK, &signals_open, NULL);
170 static void set_int_handler(void)
172 struct sigaction sigaction_open;
174 memset(&sigaction_open, 0, sizeof(struct sigaction));
175 sigaction_open.sa_handler = int_handler;
176 sigaction(SIGINT, &sigaction_open, 0);
177 sigaction(SIGTERM, &sigaction_open, 0);
181 /* The difference in seconds between two times in "timeval" format. */
182 static double time_diff(struct timeval start, struct timeval end)
184 return (end.tv_sec - start.tv_sec)
185 + (end.tv_usec - start.tv_usec) / 1E6;
188 static int alignment(int fd)
192 alignment = fpathconf(fd, _PC_REC_XFER_ALIGN);
198 static int device_magic(struct reenc_ctx *rc, header_magic set_magic)
204 devfd = open(rc->device, O_RDWR | O_DIRECT);
206 return errno == EBUSY ? -EBUSY : -EINVAL;
208 if (posix_memalign((void *)&buf, alignment(devfd), SECTOR_SIZE)) {
209 log_err(_("Allocation of aligned memory failed.\n"));
214 s = read(devfd, buf, SECTOR_SIZE);
215 if (s < 0 || s != SECTOR_SIZE) {
216 log_err(_("Cannot read device %s.\n"), rc->device);
221 if (set_magic == MAKE_UNUSABLE && !memcmp(buf, MAGIC, MAGIC_L)) {
222 log_verbose(_("Marking LUKS device %s unusable.\n"), rc->device);
223 memcpy(buf, NOMAGIC, MAGIC_L);
226 } else if (set_magic == MAKE_USABLE && !memcmp(buf, NOMAGIC, MAGIC_L)) {
227 log_verbose(_("Marking LUKS device %s usable.\n"), rc->device);
228 memcpy(buf, MAGIC, MAGIC_L);
230 } else if (set_magic == CHECK_UNUSABLE) {
231 r = memcmp(buf, NOMAGIC, MAGIC_L) ? -EINVAL : 0;
233 rc->device_uuid = strndup(&buf[0xa8], 40);
239 if (lseek(devfd, 0, SEEK_SET) == -1)
241 s = write(devfd, buf, SECTOR_SIZE);
242 if (s < 0 || s != SECTOR_SIZE) {
243 log_err(_("Cannot write device %s.\n"), rc->device);
247 log_dbg("LUKS signature check failed for %s.", rc->device);
250 memset(buf, 0, SECTOR_SIZE);
256 static int create_empty_header(const char *new_file, const char *old_file)
263 if (stat(old_file, &st) == -1 ||
264 (st.st_mode & S_IFMT) != S_IFREG ||
265 (st.st_size > 16 * 1024 * 1024))
269 log_dbg("Creating empty file %s of size %lu.", new_file, (unsigned long)size);
271 if (!(buf = malloc(size)))
273 memset(buf, 0, size);
275 fd = creat(new_file, S_IRUSR|S_IWUSR);
281 if (write(fd, buf, size) < size)
289 static int write_log(struct reenc_ctx *rc)
293 memset(rc->log_buf, 0, SECTOR_SIZE);
294 snprintf(rc->log_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, rc->log_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)
350 s = read(rc->log_fd, rc->log_buf, SECTOR_SIZE);
352 log_err(_("Cannot read reencryption log file.\n"));
356 rc->log_buf[SECTOR_SIZE - 1] = '\0';
359 end = strchr(start, '\n');
362 if (parse_line_log(rc, start)) {
363 log_err("Wrong log format.\n");
374 static void close_log(struct reenc_ctx *rc)
376 log_dbg("Closing LUKS reencryption log file %s.", rc->log_file);
377 if (rc->log_fd != -1)
383 static int open_log(struct reenc_ctx *rc)
385 int flags, create_new;
388 if (!stat(rc->log_file, &st))
390 else if (errno == ENOENT)
396 log_dbg("Creating LUKS reencryption log file %s.", rc->log_file);
397 flags = opt_directio ? O_RDWR|O_CREAT|O_DIRECT : O_RDWR|O_CREAT;
398 rc->log_fd = open(rc->log_file, flags, S_IRUSR|S_IWUSR);
399 if (rc->log_fd == -1)
402 log_dbg("Log file %s exists, restarting.", rc->log_file);
403 flags = opt_directio ? O_RDWR|O_DIRECT : O_RDWR;
404 rc->log_fd = open(rc->log_file, flags);
405 if (rc->log_fd == -1)
410 if (posix_memalign((void *)&rc->log_buf, alignment(rc->log_fd), SECTOR_SIZE)) {
411 log_err(_("Allocation of aligned memory failed.\n"));
416 if (create_new && write_log(rc) < 0) {
421 /* Be sure it is correct format */
422 return parse_log(rc);
425 static int activate_luks_headers(struct reenc_ctx *rc)
427 struct crypt_device *cd = NULL, *cd_new = NULL;
430 log_dbg("Activating LUKS devices from headers.");
432 if ((r = crypt_init(&cd, rc->header_file_org)) ||
433 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
434 (r = crypt_set_data_device(cd, rc->device)))
437 if ((r = crypt_activate_by_passphrase(cd, rc->header_file_org,
438 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
439 CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
442 if ((r = crypt_init(&cd_new, rc->header_file_new)) ||
443 (r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
444 (r = crypt_set_data_device(cd_new, rc->device)))
447 if ((r = crypt_activate_by_passphrase(cd_new, rc->header_file_new,
448 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
449 CRYPT_ACTIVATE_SHARED|CRYPT_ACTIVATE_PRIVATE)) < 0)
456 log_err(_("Activation of temporary devices failed.\n"));
460 static int backup_luks_headers(struct reenc_ctx *rc)
462 struct crypt_device *cd = NULL, *cd_new = NULL;
463 struct crypt_params_luks1 params = {0};
464 char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
467 log_dbg("Creating LUKS header backup for device %s.", rc->device);
469 if ((r = crypt_init(&cd, rc->device)) ||
470 (r = crypt_load(cd, CRYPT_LUKS1, NULL)))
473 crypt_set_confirm_callback(cd, NULL, NULL);
474 if ((r = crypt_header_backup(cd, CRYPT_LUKS1, rc->header_file_org)))
476 log_verbose(_("LUKS header backup of device %s created.\n"), rc->device);
478 if ((r = create_empty_header(rc->header_file_new, rc->header_file_org)))
481 params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
482 params.data_alignment = crypt_get_data_offset(cd);
483 params.data_device = rc->device;
485 if ((r = crypt_init(&cd_new, rc->header_file_new)))
489 crypt_set_rng_type(cd_new, CRYPT_RNG_RANDOM);
490 else if (opt_urandom)
491 crypt_set_rng_type(cd_new, CRYPT_RNG_URANDOM);
493 if (opt_iteration_time)
494 crypt_set_iteration_time(cd_new, opt_iteration_time);
497 r = crypt_parse_name_and_mode(opt_cipher, cipher, NULL, cipher_mode);
499 log_err(_("No known cipher specification pattern detected.\n"));
504 if ((r = crypt_format(cd_new, CRYPT_LUKS1,
505 opt_cipher ? cipher : crypt_get_cipher(cd),
506 opt_cipher ? cipher_mode : crypt_get_cipher_mode(cd),
508 NULL, crypt_get_volume_key_size(cd), ¶ms)))
510 log_verbose(_("New LUKS header for device %s created.\n"), rc->device);
512 for (i = 0; i < MAX_SLOT; i++) {
513 if (!rc->p[i].password)
515 if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
516 NULL, 0, rc->p[i].password, rc->p[i].passwordLen)) < 0)
518 log_verbose(_("Activated keyslot %i.\n"), r);
525 log_err(_("Creation of LUKS backup headers failed.\n"));
529 static void remove_headers(struct reenc_ctx *rc)
531 struct crypt_device *cd = NULL;
533 log_dbg("Removing headers.");
535 if (crypt_init(&cd, NULL))
537 crypt_set_log_callback(cd, _quiet_log, NULL);
538 (void)crypt_deactivate(cd, rc->header_file_org);
539 (void)crypt_deactivate(cd, rc->header_file_new);
543 static int restore_luks_header(struct reenc_ctx *rc)
545 struct crypt_device *cd = NULL;
548 log_dbg("Restoring header for %s from %s.", rc->device, rc->header_file_new);
550 r = crypt_init(&cd, rc->device);
552 crypt_set_confirm_callback(cd, NULL, NULL);
553 r = crypt_header_restore(cd, CRYPT_LUKS1, rc->header_file_new);
558 log_err(_("Cannot restore LUKS header on device %s.\n"), rc->device);
560 log_verbose(_("LUKS header on device %s restored.\n"), rc->device);
564 static void print_progress(struct reenc_ctx *rc, uint64_t bytes, int final)
566 uint64_t mbytes = (bytes - rc->restart_bytes) / 1024 / 1024;
567 struct timeval now_time;
570 gettimeofday(&now_time, NULL);
571 if (!final && time_diff(rc->end_time, now_time) < 0.5)
574 rc->end_time = now_time;
579 tdiff = time_diff(rc->start_time, rc->end_time);
583 /* vt100 code clear line */
585 log_err(_("Progress: %5.1f%%, time elapsed %4.0f seconds, "
586 "%4llu MiB written, speed %5.1f MiB/s%s"),
587 (double)bytes / rc->device_size * 100,
588 time_diff(rc->start_time, rc->end_time),
589 (unsigned long long)mbytes, (double)(mbytes) / tdiff,
593 static int copy_data_forward(struct reenc_ctx *rc, int fd_old, int fd_new,
594 size_t block_size, void *buf, uint64_t *bytes)
598 log_dbg("Reencrypting in forward direction.");
600 if (lseek64(fd_old, rc->device_offset, SEEK_SET) < 0 ||
601 lseek64(fd_new, rc->device_offset, SEEK_SET) < 0) {
602 log_err(_("Cannot seek to device offset.\n"));
606 rc->restart_bytes = *bytes = rc->device_offset;
608 if (write_log(rc) < 0)
611 while (!quit && rc->device_offset < rc->device_size) {
612 s1 = read(fd_old, buf, block_size);
613 if (s1 < 0 || ((size_t)s1 != block_size &&
614 (rc->device_offset + s1) != rc->device_size)) {
615 log_dbg("Read error, expecting %d, got %d.",
616 (int)block_size, (int)s1);
619 s2 = write(fd_new, buf, s1);
621 log_dbg("Write error, expecting %d, got %d.",
622 (int)block_size, (int)s2);
625 rc->device_offset += s1;
626 if (opt_write_log && write_log(rc) < 0)
629 *bytes += (uint64_t)s2;
630 print_progress(rc, *bytes, 0);
633 return quit ? -EAGAIN : 0;
636 static int copy_data_backward(struct reenc_ctx *rc, int fd_old, int fd_new,
637 size_t block_size, void *buf, uint64_t *bytes)
639 ssize_t s1, s2, working_block;
640 off64_t working_offset;
642 log_dbg("Reencrypting in backward direction.");
644 if (!rc->in_progress) {
645 rc->device_offset = rc->device_size;
646 rc->restart_bytes = 0;
649 rc->restart_bytes = rc->device_size - rc->device_offset;
650 *bytes = rc->restart_bytes;
653 if (write_log(rc) < 0)
656 while (!quit && rc->device_offset) {
657 if (rc->device_offset < block_size) {
659 working_block = rc->device_offset;
661 working_offset = rc->device_offset - block_size;
662 working_block = block_size;
665 if (lseek64(fd_old, working_offset, SEEK_SET) < 0 ||
666 lseek64(fd_new, working_offset, SEEK_SET) < 0) {
667 log_err(_("Cannot seek to device offset.\n"));
671 s1 = read(fd_old, buf, working_block);
672 if (s1 < 0 || (s1 != working_block)) {
673 log_dbg("Read error, expecting %d, got %d.",
674 (int)block_size, (int)s1);
677 s2 = write(fd_new, buf, working_block);
679 log_dbg("Write error, expecting %d, got %d.",
680 (int)block_size, (int)s2);
683 rc->device_offset -= s1;
684 if (opt_write_log && write_log(rc) < 0)
687 *bytes += (uint64_t)s2;
688 print_progress(rc, *bytes, 0);
691 return quit ? -EAGAIN : 0;
694 static int copy_data(struct reenc_ctx *rc)
696 size_t block_size = opt_bsize * 1024 * 1024;
697 int fd_old = -1, fd_new = -1;
702 log_dbg("Data copy preparation.");
704 fd_old = open(rc->crypt_path_org, O_RDONLY | (opt_directio ? O_DIRECT : 0));
706 log_err(_("Cannot open temporary LUKS header file.\n"));
710 fd_new = open(rc->crypt_path_new, O_WRONLY | (opt_directio ? O_DIRECT : 0));
712 log_err(_("Cannot open temporary LUKS header file.\n"));
717 if (ioctl(fd_old, BLKGETSIZE64, &rc->device_size) < 0) {
718 log_err(_("Cannot get device size.\n"));
722 if (posix_memalign((void *)&buf, alignment(fd_new), block_size)) {
723 log_err(_("Allocation of aligned memory failed.\n"));
729 gettimeofday(&rc->start_time, NULL);
731 if (rc->reencrypt_direction == FORWARD)
732 r = copy_data_forward(rc, fd_old, fd_new, block_size, buf, &bytes);
734 r = copy_data_backward(rc, fd_old, fd_new, block_size, buf, &bytes);
737 print_progress(rc, bytes, 1);
740 log_err(_("Interrupted by a signal.\n"));
742 log_err(_("IO error during reencryption.\n"));
754 static int initialize_uuid(struct reenc_ctx *rc)
756 struct crypt_device *cd = NULL;
759 log_dbg("Initialising UUID.");
761 /* Try to load LUKS from device */
762 if ((r = crypt_init(&cd, rc->device)))
764 crypt_set_log_callback(cd, _quiet_log, NULL);
765 r = crypt_load(cd, CRYPT_LUKS1, NULL);
767 rc->device_uuid = strdup(crypt_get_uuid(cd));
769 /* Reencryption already in progress - magic header? */
770 r = device_magic(rc, CHECK_UNUSABLE);
776 static int init_passphrase1(struct reenc_ctx *rc, struct crypt_device *cd,
777 const char *msg, int slot_check)
779 int r = -EINVAL, slot, retry_count;
781 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
783 retry_count = opt_tries ?: 1;
784 while (retry_count--) {
785 r = crypt_get_key(msg, &rc->p[slot].password,
786 &rc->p[slot].passwordLen,
787 0, 0, NULL /*opt_key_file*/,
792 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
793 rc->p[slot].password, rc->p[slot].passwordLen, 0);
796 crypt_safe_free(rc->p[slot].password);
797 rc->p[slot].password = NULL;
798 rc->p[slot].passwordLen = 0;
800 if (r < 0 && r != -EPERM)
806 log_err(_("No key available with this passphrase.\n"));
811 static int init_keyfile(struct reenc_ctx *rc, struct crypt_device *cd, int slot_check)
815 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
816 r = crypt_get_key(NULL, &rc->p[slot].password, &rc->p[slot].passwordLen,
817 opt_keyfile_offset, opt_keyfile_size, opt_key_file, 0, 0, cd);
821 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
822 rc->p[slot].password, rc->p[slot].passwordLen, 0);
825 * Allow keyslot only if it is last slot or if user explicitly
826 * specify whch slot to use (IOW others will be disabled).
828 if (r >= 0 && opt_key_slot == CRYPT_ANY_SLOT &&
829 crypt_keyslot_status(cd, r) != CRYPT_SLOT_ACTIVE_LAST) {
830 log_err(_("Key file can be used only with --key-slot or with "
831 "exactly one key slot active.\n"));
836 crypt_safe_free(rc->p[slot].password);
837 rc->p[slot].password = NULL;
838 rc->p[slot].passwordLen = 0;
840 log_err(_("No key available with this passphrase.\n"));
848 static int initialize_passphrase(struct reenc_ctx *rc, const char *device)
850 struct crypt_device *cd = NULL;
851 crypt_keyslot_info ki;
855 log_dbg("Passhrases initialization.");
857 if ((r = crypt_init(&cd, device)) ||
858 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
859 (r = crypt_set_data_device(cd, rc->device))) {
865 r = init_keyfile(rc, cd, opt_key_slot);
866 } else if (rc->in_progress) {
867 r = init_passphrase1(rc, cd, _("Enter any LUKS passphrase: "), CRYPT_ANY_SLOT);
868 } else for (i = 0; i < MAX_SLOT; i++) {
869 ki = crypt_keyslot_status(cd, i);
870 if (ki != CRYPT_SLOT_ACTIVE && ki != CRYPT_SLOT_ACTIVE_LAST)
873 snprintf(msg, sizeof(msg), _("Enter LUKS passphrase for key slot %u: "), i);
874 r = init_passphrase1(rc, cd, msg, i);
880 return r > 0 ? 0 : r;
883 static int initialize_context(struct reenc_ctx *rc, const char *device)
885 log_dbg("Initialising reencryption context.");
889 if (!(rc->device = strndup(device, PATH_MAX)))
892 if (initialize_uuid(rc)) {
893 log_err(_("Device %s is not a valid LUKS device.\n"), device);
897 /* Prepare device names */
898 if (snprintf(rc->log_file, PATH_MAX,
899 "LUKS-%s.log", rc->device_uuid) < 0)
901 if (snprintf(rc->header_file_org, PATH_MAX,
902 "LUKS-%s.org", rc->device_uuid) < 0)
904 if (snprintf(rc->header_file_new, PATH_MAX,
905 "LUKS-%s.new", rc->device_uuid) < 0)
908 /* Paths to encrypted devices */
909 if (snprintf(rc->crypt_path_org, PATH_MAX,
910 "%s/%s", crypt_get_dir(), rc->header_file_org) < 0)
912 if (snprintf(rc->crypt_path_new, PATH_MAX,
913 "%s/%s", crypt_get_dir(), rc->header_file_new) < 0)
918 if (open_log(rc) < 0) {
919 log_err(_("Cannot open reencryption log file.\n"));
923 if (!rc->in_progress) {
925 rc->reencrypt_direction = FORWARD;
927 rc->reencrypt_direction = BACKWARD;
928 rc->device_offset = (uint64_t)~0;
935 static void destroy_context(struct reenc_ctx *rc)
939 log_dbg("Destroying reencryption context.");
944 if ((rc->reencrypt_direction == FORWARD &&
945 rc->device_offset == rc->device_size) ||
946 rc->device_offset == 0) {
947 unlink(rc->log_file);
948 unlink(rc->header_file_org);
949 unlink(rc->header_file_new);
952 for (i = 0; i < MAX_SLOT; i++)
953 crypt_safe_free(rc->p[i].password);
956 free(rc->device_uuid);
959 static int run_reencrypt(const char *device)
962 struct reenc_ctx rc = {};
964 if (initialize_context(&rc, device))
967 log_dbg("Running reencryption.");
969 if (!rc.in_progress) {
970 if ((r = initialize_passphrase(&rc, rc.device)) ||
971 (r = backup_luks_headers(&rc)) ||
972 (r = device_magic(&rc, MAKE_UNUSABLE)))
975 if ((r = initialize_passphrase(&rc, rc.header_file_new)))
979 if ((r = activate_luks_headers(&rc)))
982 if ((r = copy_data(&rc)))
985 r = restore_luks_header(&rc);
987 destroy_context(&rc);
991 static __attribute__ ((noreturn)) void usage(poptContext popt_context,
992 int exitcode, const char *error,
995 poptPrintUsage(popt_context, stderr, 0);
997 log_err("%s: %s\n", more, error);
998 poptFreeContext(popt_context);
1002 static void help(poptContext popt_context,
1003 enum poptCallbackReason reason __attribute__((unused)),
1004 struct poptOption *key,
1005 const char *arg __attribute__((unused)),
1006 void *data __attribute__((unused)))
1008 usage(popt_context, EXIT_SUCCESS, NULL, NULL);
1011 static void _dbg_version_and_cmd(int argc, const char **argv)
1015 log_std("# %s %s processing \"", PACKAGE_NAME, PACKAGE_VERSION);
1016 for (i = 0; i < argc; i++) {
1019 log_std("%s", argv[i]);
1024 int main(int argc, const char **argv)
1026 static struct poptOption popt_help_options[] = {
1027 { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL },
1028 { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL },
1029 { "usage", '\0', POPT_ARG_NONE, NULL, 0, N_("Display brief usage"), NULL },
1032 static struct poptOption popt_options[] = {
1033 { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL },
1034 { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL },
1035 { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL },
1036 { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL },
1037 { "block-size", 'B', POPT_ARG_INT, &opt_bsize, 0, N_("Reencryption block size"), N_("MiB") },
1038 { "cipher", 'c', POPT_ARG_STRING, &opt_cipher, 0, N_("The cipher used to encrypt the disk (see /proc/crypto)"), NULL },
1039 { "hash", 'h', POPT_ARG_STRING, &opt_hash, 0, N_("The hash used to create the encryption key from the passphrase"), NULL },
1040 { "key-file", 'd', POPT_ARG_STRING, &opt_key_file, 0, N_("Read the key from a file."), NULL },
1041 { "iter-time", 'i', POPT_ARG_INT, &opt_iteration_time, 0, N_("PBKDF2 iteration time for LUKS (in ms)"), N_("msecs") },
1042 { "batch-mode", 'q', POPT_ARG_NONE, &opt_batch_mode, 0, N_("Do not ask for confirmation"), NULL },
1043 { "tries", 'T', POPT_ARG_INT, &opt_tries, 0, N_("How often the input of the passphrase can be retried"), NULL },
1044 { "use-random", '\0', POPT_ARG_NONE, &opt_random, 0, N_("Use /dev/random for generating volume key."), NULL },
1045 { "use-urandom", '\0', POPT_ARG_NONE, &opt_urandom, 0, N_("Use /dev/urandom for generating volume key."), NULL },
1046 { "use-directio", '\0', POPT_ARG_NONE, &opt_directio, 0, N_("Use direct-io when accesing devices."), NULL },
1047 { "write-log", '\0', POPT_ARG_NONE, &opt_write_log, 0, N_("Update log file after every block."), NULL },
1048 { "key-slot", 'S', POPT_ARG_INT, &opt_key_slot, 0, N_("Use only this slot (others will be disabled)."), NULL },
1049 { "keyfile-offset", '\0', POPT_ARG_LONG, &opt_keyfile_offset, 0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
1050 { "keyfile-size", 'l', POPT_ARG_LONG, &opt_keyfile_size, 0, N_("Limits the read from keyfile"), N_("bytes") },
1053 poptContext popt_context;
1056 crypt_set_log_callback(NULL, _log, NULL);
1060 setlocale(LC_ALL, "");
1061 bindtextdomain(PACKAGE, LOCALEDIR);
1062 textdomain(PACKAGE);
1064 popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
1065 poptSetOtherOptionHelp(popt_context,
1066 N_("[OPTION...] <device>]"));
1068 while((r = poptGetNextOpt(popt_context)) > 0) {
1074 usage(popt_context, EXIT_FAILURE, poptStrerror(r),
1075 poptBadOption(popt_context, POPT_BADOPTION_NOALIAS));
1076 if (opt_version_mode) {
1077 log_std("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
1078 poptFreeContext(popt_context);
1082 if (!opt_batch_mode)
1083 log_err(_("WARNING: this is experimental code, it can completely break your data.\n"));
1085 action_argv = poptGetArgs(popt_context);
1087 usage(popt_context, EXIT_FAILURE, _("Argument required."),
1088 poptGetInvocationName(popt_context));
1090 if (opt_random && opt_urandom)
1091 usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
1092 poptGetInvocationName(popt_context));
1094 if (opt_bsize < 1 || opt_bsize > 64)
1095 usage(popt_context, EXIT_FAILURE,
1096 _("Only values between 1MiB and 64 MiB allowed for reencryption block size."),
1097 poptGetInvocationName(popt_context));
1101 crypt_set_debug_level(-1);
1102 _dbg_version_and_cmd(argc, argv);
1105 r = run_reencrypt(action_argv[0]);
1107 poptFreeContext(popt_context);
1109 /* Translate exit code to simple codes */
1111 case 0: r = EXIT_SUCCESS; break;
1113 case -EBUSY: r = 5; break;
1115 case -ENODEV: r = 4; break;
1116 case -ENOMEM: r = 3; break;
1117 case -EPERM: r = 2; break;
1122 default: r = EXIT_FAILURE;