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 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 || (st.st_mode & S_IFMT) != S_IFREG)
266 log_dbg("Creating empty file %s of size %lu.", new_file, (unsigned long)size);
268 if (!(buf = malloc(size)))
270 memset(buf, 0, size);
272 fd = creat(new_file, S_IRUSR|S_IWUSR);
278 if (write(fd, buf, size) < size)
286 static int write_log(struct reenc_ctx *rc)
288 static char buf[SECTOR_SIZE];
291 memset(buf, 0, SECTOR_SIZE);
292 snprintf(buf, SECTOR_SIZE, "# LUKS reencryption log, DO NOT EDIT OR DELETE.\n"
293 "version = %d\nUUID = %s\ndirection = %d\n"
294 "offset = %" PRIu64 "\nshift = %" PRIu64 "\n# EOF\n",
295 1, rc->device_uuid, rc->reencrypt_direction,
296 rc->device_offset, rc->device_shift);
298 lseek(rc->log_fd, 0, SEEK_SET);
299 r = write(rc->log_fd, buf, SECTOR_SIZE);
300 if (r < 0 || r != SECTOR_SIZE) {
301 log_err(_("Cannot write reencryption log file.\n"));
308 static int parse_line_log(struct reenc_ctx *rc, const char *line)
314 /* whole line is comment */
318 if (sscanf(line, "version = %d", &i) == 1) {
320 log_dbg("Log: Unexpected version = %i", i);
323 } else if (sscanf(line, "UUID = %40s", s) == 1) {
324 if (!rc->device_uuid || strcmp(rc->device_uuid, s)) {
325 log_dbg("Log: Unexpected UUID %s", s);
328 } else if (sscanf(line, "direction = %d", &i) == 1) {
329 log_dbg("Log: direction = %i", i);
330 rc->reencrypt_direction = i;
331 } else if (sscanf(line, "offset = %" PRIu64, &u64) == 1) {
332 log_dbg("Log: offset = %" PRIu64, u64);
333 rc->device_offset = u64;
334 } else if (sscanf(line, "shift = %" PRIu64, &u64) == 1) {
335 log_dbg("Log: shift = %" PRIu64, u64);
336 rc->device_shift = u64;
343 static int parse_log(struct reenc_ctx *rc)
345 static char buf[SECTOR_SIZE];
349 s = read(rc->log_fd, buf, SECTOR_SIZE);
351 log_err(_("Cannot read reencryption log file.\n"));
355 buf[SECTOR_SIZE - 1] = '\0';
358 end = strchr(start, '\n');
361 if (parse_line_log(rc, start)) {
362 log_err("Wrong log format.\n");
373 static int open_log(struct reenc_ctx *rc)
378 if(stat(rc->log_file, &st) < 0) {
379 log_dbg("Creating LUKS reencryption log file %s.", rc->log_file);
380 flags = opt_directio ? O_RDWR|O_CREAT|O_DIRECT : O_RDWR|O_CREAT;
381 rc->log_fd = open(rc->log_file, flags, S_IRUSR|S_IWUSR);
382 if (rc->log_fd == -1)
384 if (write_log(rc) < 0)
387 log_dbg("Log file %s exists, restarting.", rc->log_file);
388 flags = opt_directio ? O_RDWR|O_DIRECT : O_RDWR;
389 rc->log_fd = open(rc->log_file, flags);
390 if (rc->log_fd == -1)
395 /* Be sure it is correct format */
396 return parse_log(rc);
399 static void close_log(struct reenc_ctx *rc)
401 log_dbg("Closing LUKS reencryption log file %s.", rc->log_file);
402 if (rc->log_fd != -1)
406 static int activate_luks_headers(struct reenc_ctx *rc)
408 struct crypt_device *cd = NULL, *cd_new = NULL;
411 log_dbg("Activating LUKS devices from headers.");
413 if ((r = crypt_init(&cd, rc->header_file_org)) ||
414 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
415 (r = crypt_set_data_device(cd, rc->device)))
418 if ((r = crypt_activate_by_passphrase(cd, rc->header_file_org,
419 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
420 CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
423 if ((r = crypt_init(&cd_new, rc->header_file_new)) ||
424 (r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
425 (r = crypt_set_data_device(cd_new, rc->device)))
428 if ((r = crypt_activate_by_passphrase(cd_new, rc->header_file_new,
429 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
430 CRYPT_ACTIVATE_SHARED|CRYPT_ACTIVATE_PRIVATE)) < 0)
437 log_err(_("Activation of temporary devices failed.\n"));
441 static int backup_luks_headers(struct reenc_ctx *rc)
443 struct crypt_device *cd = NULL, *cd_new = NULL;
444 struct crypt_params_luks1 params = {0};
445 char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
448 log_dbg("Creating LUKS header backup for device %s.", rc->device);
450 if ((r = crypt_init(&cd, rc->device)) ||
451 (r = crypt_load(cd, CRYPT_LUKS1, NULL)))
454 crypt_set_confirm_callback(cd, NULL, NULL);
455 if ((r = crypt_header_backup(cd, CRYPT_LUKS1, rc->header_file_org)))
457 log_verbose(_("LUKS header backup of device %s created.\n"), rc->device);
459 if ((r = create_empty_header(rc->header_file_new, rc->header_file_org)))
462 params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
463 params.data_alignment = crypt_get_data_offset(cd);
464 params.data_device = rc->device;
466 if ((r = crypt_init(&cd_new, rc->header_file_new)))
470 crypt_set_rng_type(cd_new, CRYPT_RNG_RANDOM);
471 else if (opt_urandom)
472 crypt_set_rng_type(cd_new, CRYPT_RNG_URANDOM);
474 if (opt_iteration_time)
475 crypt_set_iteration_time(cd_new, opt_iteration_time);
478 r = crypt_parse_name_and_mode(opt_cipher, cipher, NULL, cipher_mode);
480 log_err(_("No known cipher specification pattern detected.\n"));
485 if ((r = crypt_format(cd_new, CRYPT_LUKS1,
486 opt_cipher ? cipher : crypt_get_cipher(cd),
487 opt_cipher ? cipher_mode : crypt_get_cipher_mode(cd),
489 NULL, crypt_get_volume_key_size(cd), ¶ms)))
491 log_verbose(_("New LUKS header for device %s created.\n"), rc->device);
493 for (i = 0; i < MAX_SLOT; i++) {
494 if (!rc->p[i].password)
496 if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
497 NULL, 0, rc->p[i].password, rc->p[i].passwordLen)) < 0)
499 log_verbose(_("Activated keyslot %i.\n"), r);
506 log_err(_("Creation of LUKS backup headers failed.\n"));
510 static void remove_headers(struct reenc_ctx *rc)
512 struct crypt_device *cd = NULL;
514 log_dbg("Removing headers.");
516 if (crypt_init(&cd, NULL))
518 crypt_set_log_callback(cd, _quiet_log, NULL);
519 (void)crypt_deactivate(cd, rc->header_file_org);
520 (void)crypt_deactivate(cd, rc->header_file_new);
524 static int restore_luks_header(struct reenc_ctx *rc, const char *backup)
526 struct crypt_device *cd = NULL;
529 log_dbg("Restoring header for %s from %s.", rc->device, backup);
531 r = crypt_init(&cd, rc->device);
533 crypt_set_confirm_callback(cd, NULL, NULL);
534 r = crypt_header_restore(cd, CRYPT_LUKS1, backup);
539 log_err(_("Cannot restore LUKS header on device %s.\n"), rc->device);
541 log_verbose(_("LUKS header on device %s restored.\n"), rc->device);
545 void print_progress(struct reenc_ctx *rc, uint64_t bytes, int final)
547 uint64_t mbytes = (bytes - rc->restart_bytes) / 1024 / 1024;
548 struct timeval now_time;
551 gettimeofday(&now_time, NULL);
552 if (!final && time_diff(rc->end_time, now_time) < 0.5)
555 rc->end_time = now_time;
560 tdiff = time_diff(rc->start_time, rc->end_time);
564 /* vt100 code clear line */
566 log_err(_("Progress: %5.1f%%, time elapsed %3.1f seconds, "
567 "%4llu MiB written, speed %5.1f MiB/s%s"),
568 (double)bytes / rc->device_size * 100,
569 time_diff(rc->start_time, rc->end_time),
570 (unsigned long long)mbytes, (double)(mbytes) / tdiff,
574 static int copy_data_forward(struct reenc_ctx *rc, int fd_old, int fd_new,
575 size_t block_size, void *buf, uint64_t *bytes)
579 log_dbg("Reencrypting in forward direction.");
581 if (lseek64(fd_old, rc->device_offset, SEEK_SET) < 0 ||
582 lseek64(fd_new, rc->device_offset, SEEK_SET) < 0) {
583 log_err(_("Cannot seek to device offset.\n"));
587 rc->restart_bytes = *bytes = rc->device_offset;
589 if (write_log(rc) < 0)
592 while (!quit && rc->device_offset < rc->device_size) {
593 s1 = read(fd_old, buf, block_size);
594 if (s1 < 0 || (s1 != block_size && (rc->device_offset + s1) != rc->device_size)) {
595 log_dbg("Read error, expecting %d, got %d.", (int)block_size, (int)s1);
598 s2 = write(fd_new, buf, s1);
600 log_dbg("Write error, expecting %d, got %d.", (int)block_size, (int)s2);
603 rc->device_offset += s1;
604 if (opt_write_log && write_log(rc) < 0)
607 *bytes += (uint64_t)s2;
608 print_progress(rc, *bytes, 0);
611 return quit ? -EAGAIN : 0;
614 static int copy_data_backward(struct reenc_ctx *rc, int fd_old, int fd_new,
615 size_t block_size, void *buf, uint64_t *bytes)
617 ssize_t s1, s2, working_block;
618 off64_t working_offset;
620 log_dbg("Reencrypting in backward direction.");
622 if (!rc->in_progress) {
623 rc->device_offset = rc->device_size;
624 rc->restart_bytes = 0;
627 rc->restart_bytes = rc->device_size - rc->device_offset;
628 *bytes = rc->restart_bytes;
631 if (write_log(rc) < 0)
634 while (!quit && rc->device_offset) {
635 if (rc->device_offset < block_size) {
637 working_block = rc->device_offset;
639 working_offset = rc->device_offset - block_size;
640 working_block = block_size;
643 if (lseek64(fd_old, working_offset, SEEK_SET) < 0 ||
644 lseek64(fd_new, working_offset, SEEK_SET) < 0) {
645 log_err(_("Cannot seek to device offset.\n"));
649 s1 = read(fd_old, buf, working_block);
650 if (s1 < 0 || (s1 != working_block)) {
651 log_dbg("Read error, expecting %d, got %d.", (int)block_size, (int)s1);
654 s2 = write(fd_new, buf, working_block);
656 log_dbg("Write error, expecting %d, got %d.", (int)block_size, (int)s2);
659 rc->device_offset -= s1;
660 if (opt_write_log && write_log(rc) < 0)
663 *bytes += (uint64_t)s2;
664 print_progress(rc, *bytes, 0);
667 return quit ? -EAGAIN : 0;
670 static int copy_data(struct reenc_ctx *rc)
672 size_t block_size = opt_bsize * 1024 * 1024;
673 int fd_old = -1, fd_new = -1;
678 log_dbg("Data copy preparation.");
680 fd_old = open(rc->crypt_path_org, O_RDONLY | (opt_directio ? O_DIRECT : 0));
682 log_err(_("Cannot open temporary LUKS header file.\n"));
686 fd_new = open(rc->crypt_path_new, O_WRONLY | (opt_directio ? O_DIRECT : 0));
688 log_err(_("Cannot open temporary LUKS header file.\n"));
693 if (ioctl(fd_old, BLKGETSIZE64, &rc->device_size) < 0) {
694 log_err(_("Cannot get device size.\n"));
698 if (posix_memalign((void *)&buf, alignment(fd_new), block_size)) {
699 log_err(_("Allocation of aligned memory failed.\n"));
705 gettimeofday(&rc->start_time, NULL);
707 if (rc->reencrypt_direction == FORWARD)
708 r = copy_data_forward(rc, fd_old, fd_new, block_size, buf, &bytes);
710 r = copy_data_backward(rc, fd_old, fd_new, block_size, buf, &bytes);
713 print_progress(rc, bytes, 1);
716 log_err(_("Interrupted by a signal.\n"));
718 log_err(_("IO error during reencryption.\n"));
730 static int initialize_uuid(struct reenc_ctx *rc)
732 struct crypt_device *cd = NULL;
735 log_dbg("Initialising UUID.");
737 /* Try to load LUKS from device */
738 if ((r = crypt_init(&cd, rc->device)))
740 crypt_set_log_callback(cd, _quiet_log, NULL);
741 r = crypt_load(cd, CRYPT_LUKS1, NULL);
743 rc->device_uuid = strdup(crypt_get_uuid(cd));
745 /* Reencryption already in progress - magic header? */
746 r = device_magic(rc, CHECK_UNUSABLE);
752 static int init_passphrase1(struct reenc_ctx *rc, struct crypt_device *cd,
753 const char *msg, int slot_check)
755 int r = -EINVAL, slot, retry_count;
757 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
759 retry_count = opt_tries ?: 1;
760 while (retry_count--) {
761 r = crypt_get_key(msg, &rc->p[slot].password,
762 &rc->p[slot].passwordLen,
763 0, 0, NULL /*opt_key_file*/,
768 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
769 rc->p[slot].password, rc->p[slot].passwordLen, 0);
772 crypt_safe_free(rc->p[slot].password);
773 rc->p[slot].password = NULL;
774 rc->p[slot].passwordLen = 0;
776 if (r < 0 && r != -EPERM)
782 log_err(_("No key available with this passphrase.\n"));
787 static int init_keyfile(struct reenc_ctx *rc, struct crypt_device *cd, int slot_check)
791 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
792 r = crypt_get_key(NULL, &rc->p[slot].password, &rc->p[slot].passwordLen,
793 opt_keyfile_offset, opt_keyfile_size, opt_key_file, 0, 0, cd);
797 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
798 rc->p[slot].password, rc->p[slot].passwordLen, 0);
801 * Allow keyslot only if it is last slot or if user explicitly
802 * specify whch slot to use (IOW others will be disabled).
804 if (r >= 0 && opt_key_slot == CRYPT_ANY_SLOT &&
805 crypt_keyslot_status(cd, r) != CRYPT_SLOT_ACTIVE_LAST) {
806 log_err(_("Key file can be used only with --key-slot or with "
807 "exactly one key slot active.\n"));
812 crypt_safe_free(rc->p[slot].password);
813 rc->p[slot].password = NULL;
814 rc->p[slot].passwordLen = 0;
816 log_err(_("No key available with this passphrase.\n"));
824 static int initialize_passphrase(struct reenc_ctx *rc, const char *device)
826 struct crypt_device *cd = NULL;
827 crypt_keyslot_info ki;
831 log_dbg("Passhrases initialization.");
833 if ((r = crypt_init(&cd, device)) ||
834 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
835 (r = crypt_set_data_device(cd, rc->device))) {
841 r = init_keyfile(rc, cd, opt_key_slot);
842 } else if (rc->in_progress) {
843 r = init_passphrase1(rc, cd, _("Enter any LUKS passphrase: "), CRYPT_ANY_SLOT);
844 } else for (i = 0; i < MAX_SLOT; i++) {
845 ki = crypt_keyslot_status(cd, i);
846 if (ki != CRYPT_SLOT_ACTIVE && ki != CRYPT_SLOT_ACTIVE_LAST)
849 snprintf(msg, sizeof(msg), _("Enter LUKS passphrase for key slot %u): "), i);
850 r = init_passphrase1(rc, cd, msg, i);
856 return r > 0 ? 0 : r;
859 static int initialize_context(struct reenc_ctx *rc, const char *device)
861 log_dbg("Initialising reencryption context.");
865 if (!(rc->device = strndup(device, PATH_MAX)))
868 if (initialize_uuid(rc)) {
869 log_err(_("Device %s is not a valid LUKS device.\n"), device);
873 /* Prepare device names */
874 if (snprintf(rc->log_file, PATH_MAX,
875 "LUKS-%s.log", rc->device_uuid) < 0)
877 if (snprintf(rc->header_file_org, PATH_MAX,
878 "LUKS-%s.org", rc->device_uuid) < 0)
880 if (snprintf(rc->header_file_new, PATH_MAX,
881 "LUKS-%s.new", rc->device_uuid) < 0)
884 /* Paths to encrypted devices */
885 if (snprintf(rc->crypt_path_org, PATH_MAX,
886 "%s/%s", crypt_get_dir(), rc->header_file_org) < 0)
888 if (snprintf(rc->crypt_path_new, PATH_MAX,
889 "%s/%s", crypt_get_dir(), rc->header_file_new) < 0)
894 if (open_log(rc) < 0) {
895 log_err(_("Cannot open reencryption log file.\n"));
899 if (!rc->in_progress) {
901 rc->reencrypt_direction = FORWARD;
903 rc->reencrypt_direction = BACKWARD;
904 rc->device_offset = (uint64_t)~0;
911 static void destroy_context(struct reenc_ctx *rc)
915 log_dbg("Destroying reencryption context.");
920 if ((rc->reencrypt_direction == FORWARD &&
921 rc->device_offset == rc->device_size) ||
922 rc->device_offset == 0) {
923 unlink(rc->log_file);
924 unlink(rc->header_file_org);
925 unlink(rc->header_file_new);
928 for (i = 0; i < MAX_SLOT; i++)
929 crypt_safe_free(rc->p[i].password);
932 free(rc->device_uuid);
935 int run_reencrypt(const char *device)
938 struct reenc_ctx rc = {};
940 if (initialize_context(&rc, device))
943 log_dbg("Running reencryption.");
945 if (!rc.in_progress) {
946 if ((r = initialize_passphrase(&rc, rc.device)) ||
947 (r = backup_luks_headers(&rc)) ||
948 (r = device_magic(&rc, MAKE_UNUSABLE)))
951 if ((r = initialize_passphrase(&rc, rc.header_file_new)))
955 if ((r = activate_luks_headers(&rc)))
958 if ((r = copy_data(&rc)))
961 r = restore_luks_header(&rc, rc.header_file_new);
963 destroy_context(&rc);
967 static __attribute__ ((noreturn)) void usage(poptContext popt_context,
968 int exitcode, const char *error,
971 poptPrintUsage(popt_context, stderr, 0);
973 log_err("%s: %s\n", more, error);
974 poptFreeContext(popt_context);
978 static void help(poptContext popt_context,
979 enum poptCallbackReason reason __attribute__((unused)),
980 struct poptOption *key,
981 const char *arg __attribute__((unused)),
982 void *data __attribute__((unused)))
984 usage(popt_context, EXIT_SUCCESS, NULL, NULL);
987 static void _dbg_version_and_cmd(int argc, const char **argv)
991 log_std("# %s %s processing \"", PACKAGE_NAME, PACKAGE_VERSION);
992 for (i = 0; i < argc; i++) {
995 log_std("%s", argv[i]);
1000 int main(int argc, const char **argv)
1002 static struct poptOption popt_help_options[] = {
1003 { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL },
1004 { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL },
1005 { "usage", '\0', POPT_ARG_NONE, NULL, 0, N_("Display brief usage"), NULL },
1008 static struct poptOption popt_options[] = {
1009 { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL },
1010 { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL },
1011 { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL },
1012 { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL },
1013 { "block-size", 'B', POPT_ARG_INT, &opt_bsize, 0, N_("Reencryption block size"), N_("MiB") },
1014 { "cipher", 'c', POPT_ARG_STRING, &opt_cipher, 0, N_("The cipher used to encrypt the disk (see /proc/crypto)"), NULL },
1015 { "hash", 'h', POPT_ARG_STRING, &opt_hash, 0, N_("The hash used to create the encryption key from the passphrase"), NULL },
1016 { "key-file", 'd', POPT_ARG_STRING, &opt_key_file, 0, N_("Read the key from a file."), NULL },
1017 { "iter-time", 'i', POPT_ARG_INT, &opt_iteration_time, 0, N_("PBKDF2 iteration time for LUKS (in ms)"), N_("msecs") },
1018 { "batch-mode", 'q', POPT_ARG_NONE, &opt_batch_mode, 0, N_("Do not ask for confirmation"), NULL },
1019 { "tries", 'T', POPT_ARG_INT, &opt_tries, 0, N_("How often the input of the passphrase can be retried"), NULL },
1020 { "use-random", '\0', POPT_ARG_NONE, &opt_random, 0, N_("Use /dev/random for generating volume key."), NULL },
1021 { "use-urandom", '\0', POPT_ARG_NONE, &opt_urandom, 0, N_("Use /dev/urandom for generating volume key."), NULL },
1022 { "use-directio", '\0', POPT_ARG_NONE, &opt_directio, 0, N_("Use direct-io when accesing devices."), NULL },
1023 { "write-log", '\0', POPT_ARG_NONE, &opt_write_log, 0, N_("Update log file after every block."), NULL },
1024 { "key-slot", 'S', POPT_ARG_INT, &opt_key_slot, 0, N_("Use only this slot (others will be disabled)."), NULL },
1025 { "keyfile-offset", '\0', POPT_ARG_LONG, &opt_keyfile_offset, 0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
1026 { "keyfile-size", 'l', POPT_ARG_LONG, &opt_keyfile_size, 0, N_("Limits the read from keyfile"), N_("bytes") },
1029 poptContext popt_context;
1032 crypt_set_log_callback(NULL, _log, NULL);
1036 setlocale(LC_ALL, "");
1037 bindtextdomain(PACKAGE, LOCALEDIR);
1038 textdomain(PACKAGE);
1040 popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
1041 poptSetOtherOptionHelp(popt_context,
1042 N_("[OPTION...] <device>]"));
1044 while((r = poptGetNextOpt(popt_context)) > 0) {
1050 usage(popt_context, EXIT_FAILURE, poptStrerror(r),
1051 poptBadOption(popt_context, POPT_BADOPTION_NOALIAS));
1052 if (opt_version_mode) {
1053 log_std("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
1054 poptFreeContext(popt_context);
1058 if (!opt_batch_mode)
1059 log_err(_("WARNING: this is experimental code, it can completely break your data.\n"));
1061 action_argv = poptGetArgs(popt_context);
1063 usage(popt_context, EXIT_FAILURE, _("Argument required."),
1064 poptGetInvocationName(popt_context));
1066 if (opt_random && opt_urandom)
1067 usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
1068 poptGetInvocationName(popt_context));
1070 if (opt_bsize < 1 || opt_bsize > 64)
1071 usage(popt_context, EXIT_FAILURE,
1072 _("Only values between 1MiB and 64 MiB allowed for reencryption block size."),
1073 poptGetInvocationName(popt_context));
1077 crypt_set_debug_level(-1);
1078 _dbg_version_and_cmd(argc, argv);
1081 r = run_reencrypt(action_argv[0]);
1083 poptFreeContext(popt_context);
1085 /* Translate exit code to simple codes */
1087 case 0: r = EXIT_SUCCESS; break;
1089 case -EBUSY: r = 5; break;
1091 case -ENODEV: r = 4; break;
1092 case -ENOMEM: r = 3; break;
1093 case -EPERM: r = 2; break;
1098 default: r = EXIT_FAILURE;