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>
39 #include <libcryptsetup.h>
42 #include "cryptsetup.h"
44 static int opt_verbose = 0;
45 static int opt_debug = 0;
46 static const char *opt_cipher = NULL;
47 static const char *opt_hash = NULL;
48 static const char *opt_key_file = NULL;
49 static long opt_keyfile_size = 0;
50 static long opt_keyfile_offset = 0;
51 static int opt_iteration_time = 1000;
52 static int opt_batch_mode = 0;
53 static int opt_version_mode = 0;
54 static int opt_random = 0;
55 static int opt_urandom = 0;
56 static int opt_bsize = 4;
57 static int opt_directio = 0;
58 static int opt_write_log = 0;
59 static int opt_tries = 3;
60 static int opt_key_slot = CRYPT_ANY_SLOT;
62 static const char **action_argv;
64 static volatile int quit = 0;
71 uint64_t device_offset;
72 uint64_t device_shift;
75 enum { FORWARD = 0, BACKWARD = 1 } reencrypt_direction;
77 char header_file_org[PATH_MAX];
78 char header_file_new[PATH_MAX];
79 char log_file[PATH_MAX];
81 char crypt_path_org[PATH_MAX];
82 char crypt_path_new[PATH_MAX];
91 struct timeval start_time, end_time;
92 uint64_t restart_bytes;
95 char MAGIC[] = {'L','U','K','S', 0xba, 0xbe};
96 char NOMAGIC[] = {'L','U','K','S', 0xde, 0xad};
105 __attribute__((format(printf, 5, 6)))
106 static void clogger(struct crypt_device *cd, int level, const char *file,
107 int line, const char *format, ...)
112 va_start(argp, format);
114 if (vasprintf(&target, format, argp) > 0) {
116 crypt_log(cd, level, target);
117 } else if (opt_debug)
118 printf("# %s\n", target);
125 static void _log(int level, const char *msg, void *usrptr __attribute__((unused)))
129 case CRYPT_LOG_NORMAL:
132 case CRYPT_LOG_VERBOSE:
136 case CRYPT_LOG_ERROR:
139 case CRYPT_LOG_DEBUG:
141 printf("# %s\n", msg);
144 fprintf(stderr, "Internal error on logging class for msg: %s", msg);
149 static void _quiet_log(int level, const char *msg, void *usrptr)
151 if (!opt_verbose && (level == CRYPT_LOG_ERROR || level == CRYPT_LOG_NORMAL))
152 level = CRYPT_LOG_VERBOSE;
153 _log(level, msg, usrptr);
156 static void int_handler(int sig __attribute__((__unused__)))
161 static void set_int_block(int block)
163 sigset_t signals_open;
165 sigemptyset(&signals_open);
166 sigaddset(&signals_open, SIGINT);
167 sigaddset(&signals_open, SIGTERM);
168 sigprocmask(block ? SIG_SETMASK : SIG_UNBLOCK, &signals_open, NULL);
171 static void set_int_handler(void)
173 struct sigaction sigaction_open;
175 memset(&sigaction_open, 0, sizeof(struct sigaction));
176 sigaction_open.sa_handler = int_handler;
177 sigaction(SIGINT, &sigaction_open, 0);
178 sigaction(SIGTERM, &sigaction_open, 0);
182 /* The difference in seconds between two times in "timeval" format. */
183 double time_diff(struct timeval start, struct timeval end)
185 return (end.tv_sec - start.tv_sec)
186 + (end.tv_usec - start.tv_usec) / 1E6;
189 static int alignment(int fd)
193 alignment = fpathconf(fd, _PC_REC_XFER_ALIGN);
199 static int device_magic(header_magic set_magic)
205 devfd = open(rnc.device, O_RDWR | O_DIRECT);
207 return errno == EBUSY ? -EBUSY : -EINVAL;
209 if (posix_memalign((void *)&buf, alignment(devfd), SECTOR_SIZE)) {
210 log_err(_("Allocation of aligned memory failed.\n"));
215 s = read(devfd, buf, SECTOR_SIZE);
216 if (s < 0 || s != SECTOR_SIZE) {
217 log_err(_("Cannot read device %s.\n"), rnc.device);
222 if (set_magic == MAKE_UNUSABLE && !memcmp(buf, MAGIC, MAGIC_L)) {
223 log_verbose(_("Marking LUKS device %s unusable.\n"), rnc.device);
224 memcpy(buf, NOMAGIC, MAGIC_L);
227 } else if (set_magic == MAKE_USABLE && !memcmp(buf, NOMAGIC, MAGIC_L)) {
228 log_verbose(_("Marking LUKS device %s usable.\n"), rnc.device);
229 memcpy(buf, MAGIC, MAGIC_L);
231 } else if (set_magic == CHECK_UNUSABLE) {
232 r = memcmp(buf, NOMAGIC, MAGIC_L) ? -EINVAL : 0;
234 rnc.device_uuid = strndup(&buf[0xa8], 40);
240 if (lseek(devfd, 0, SEEK_SET) == -1)
242 s = write(devfd, buf, SECTOR_SIZE);
243 if (s < 0 || s != SECTOR_SIZE) {
244 log_err(_("Cannot write device %s.\n"), rnc.device);
248 log_dbg("LUKS signature check failed for %s.", rnc.device);
251 memset(buf, 0, SECTOR_SIZE);
257 static int create_empty_header(const char *new_file, const char *old_file)
264 if (stat(old_file, &st) == -1 || (st.st_mode & S_IFMT) != S_IFREG)
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(void)
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, rnc.device_uuid, rnc.reencrypt_direction,
298 rnc.device_offset, rnc.device_shift);
300 lseek(rnc.log_fd, 0, SEEK_SET);
301 r = write(rnc.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(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 (!rnc.device_uuid || strcmp(rnc.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 rnc.reencrypt_direction = i;
333 } else if (sscanf(line, "offset = %" PRIu64, &u64) == 1) {
334 log_dbg("Log: offset = %" PRIu64, u64);
335 rnc.device_offset = u64;
336 } else if (sscanf(line, "shift = %" PRIu64, &u64) == 1) {
337 log_dbg("Log: shift = %" PRIu64, u64);
338 rnc.device_shift = u64;
345 static int parse_log(void)
347 static char buf[SECTOR_SIZE];
351 s = read(rnc.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(start)) {
364 log_err("Wrong log format.\n");
375 static int open_log(void)
380 if(stat(rnc.log_file, &st) < 0) {
381 log_dbg("Creating LUKS reencryption log file %s.", rnc.log_file);
382 flags = opt_directio ? O_RDWR|O_CREAT|O_DIRECT : O_RDWR|O_CREAT;
383 rnc.log_fd = open(rnc.log_file, flags, S_IRUSR|S_IWUSR);
384 if (rnc.log_fd == -1)
389 log_dbg("Log file %s exists, restarting.", rnc.log_file);
390 flags = opt_directio ? O_RDWR|O_DIRECT : O_RDWR;
391 rnc.log_fd = open(rnc.log_file, flags);
392 if (rnc.log_fd == -1)
397 /* Be sure it is correct format */
401 static void close_log(void)
403 log_dbg("Closing LUKS reencryption log file %s.", rnc.log_file);
404 if (rnc.log_fd != -1)
408 static int activate_luks_headers(void)
410 struct crypt_device *cd = NULL, *cd_new = NULL;
413 log_dbg("Activating LUKS devices from headers.");
415 if ((r = crypt_init(&cd, rnc.header_file_org)) ||
416 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
417 (r = crypt_set_data_device(cd, rnc.device)))
420 if ((r = crypt_activate_by_passphrase(cd, rnc.header_file_org,
421 opt_key_slot, rnc.p[rnc.keyslot].password, rnc.p[rnc.keyslot].passwordLen,
422 CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
425 if ((r = crypt_init(&cd_new, rnc.header_file_new)) ||
426 (r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
427 (r = crypt_set_data_device(cd_new, rnc.device)))
430 if ((r = crypt_activate_by_passphrase(cd_new, rnc.header_file_new,
431 opt_key_slot, rnc.p[rnc.keyslot].password, rnc.p[rnc.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(void)
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.", rnc.device);
452 if ((r = crypt_init(&cd, rnc.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, rnc.header_file_org)))
459 log_verbose(_("LUKS header backup of device %s created.\n"), rnc.device);
461 if ((r = create_empty_header(rnc.header_file_new, rnc.header_file_org)))
464 params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
465 params.data_alignment = crypt_get_data_offset(cd);
466 params.data_device = rnc.device;
468 if ((r = crypt_init(&cd_new, rnc.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"), rnc.device);
495 for (i = 0; i < MAX_SLOT; i++) {
496 if (!rnc.p[i].password)
498 if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
499 NULL, 0, rnc.p[i].password, rnc.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(void)
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, rnc.header_file_org);
522 (void)crypt_deactivate(cd, rnc.header_file_new);
526 static int restore_luks_header(const char *backup)
528 struct crypt_device *cd = NULL;
531 log_dbg("Restoring header for %s from %s.", rnc.device, backup);
533 r = crypt_init(&cd, rnc.device);
535 crypt_set_confirm_callback(cd, NULL, NULL);
536 r = crypt_header_restore(cd, CRYPT_LUKS1, backup);
541 log_err(_("Cannot restore LUKS header on device %s.\n"), rnc.device);
543 log_verbose(_("LUKS header on device %s restored.\n"), rnc.device);
547 void print_progress(uint64_t bytes, int final)
549 uint64_t mbytes = (bytes - rnc.restart_bytes) / 1024 / 1024;
550 struct timeval now_time;
553 gettimeofday(&now_time, NULL);
554 if (!final && time_diff(rnc.end_time, now_time) < 0.5)
557 rnc.end_time = now_time;
562 tdiff = time_diff(rnc.start_time, rnc.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 / rnc.device_size * 100,
571 time_diff(rnc.start_time, rnc.end_time),
572 (unsigned long long)mbytes, (double)(mbytes) / tdiff,
576 static int copy_data_forward(int fd_old, int fd_new, size_t block_size, void *buf, uint64_t *bytes)
580 log_dbg("Reencrypting in forward direction.");
582 if (lseek64(fd_old, rnc.device_offset, SEEK_SET) < 0 ||
583 lseek64(fd_new, rnc.device_offset, SEEK_SET) < 0) {
584 log_err(_("Cannot seek to device offset.\n"));
588 rnc.restart_bytes = *bytes = rnc.device_offset;
593 while (!quit && rnc.device_offset < rnc.device_size) {
594 s1 = read(fd_old, buf, block_size);
595 if (s1 < 0 || (s1 != block_size && (rnc.device_offset + s1) != rnc.device_size)) {
596 log_dbg("Read error, expecting %d, got %d.", (int)block_size, (int)s1);
599 s2 = write(fd_new, buf, s1);
601 log_dbg("Write error, expecting %d, got %d.", (int)block_size, (int)s2);
604 rnc.device_offset += s1;
605 if (opt_write_log && write_log() < 0)
608 *bytes += (uint64_t)s2;
609 print_progress(*bytes, 0);
612 return quit ? -EAGAIN : 0;
615 static int copy_data_backward(int fd_old, int fd_new, 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 (!rnc.in_progress) {
623 rnc.device_offset = rnc.device_size;
624 rnc.restart_bytes = 0;
627 rnc.restart_bytes = rnc.device_size - rnc.device_offset;
628 *bytes = rnc.restart_bytes;
634 while (!quit && rnc.device_offset) {
635 if (rnc.device_offset < block_size) {
637 working_block = rnc.device_offset;
639 working_offset = rnc.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 rnc.device_offset -= s1;
660 if (opt_write_log && write_log() < 0)
663 *bytes += (uint64_t)s2;
664 print_progress(*bytes, 0);
667 return quit ? -EAGAIN : 0;
670 static int copy_data(void)
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(rnc.crypt_path_org, O_RDONLY | (opt_directio ? O_DIRECT : 0));
682 log_err(_("Cannot open temporary LUKS header file.\n"));
686 fd_new = open(rnc.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, &rnc.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(&rnc.start_time, NULL);
707 if (rnc.reencrypt_direction == FORWARD)
708 r = copy_data_forward(fd_old, fd_new, block_size, buf, &bytes);
710 r = copy_data_backward(fd_old, fd_new, block_size, buf, &bytes);
713 print_progress(bytes, 1);
716 log_err(_("Interrupted by a signal.\n"));
718 log_err(_("IO error during reencryption.\n"));
730 static int initialize_uuid(void)
732 struct crypt_device *cd = NULL;
735 log_dbg("Initialising UUID.");
737 /* Try to load LUKS from device */
738 if ((r = crypt_init(&cd, rnc.device)))
740 crypt_set_log_callback(cd, _quiet_log, NULL);
741 r = crypt_load(cd, CRYPT_LUKS1, NULL);
743 rnc.device_uuid = strdup(crypt_get_uuid(cd));
745 /* Reencryption already in progress - magic header? */
746 r = device_magic(CHECK_UNUSABLE);
752 static int init_passphrase1(struct crypt_device *cd, const char *msg, int slot_check)
754 int r = -EINVAL, slot, retry_count;
756 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
758 retry_count = opt_tries ?: 1;
759 while (retry_count--) {
760 r = crypt_get_key(msg, &rnc.p[slot].password,
761 &rnc.p[slot].passwordLen,
762 0, 0, NULL /*opt_key_file*/,
767 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
768 rnc.p[slot].password, rnc.p[slot].passwordLen, 0);
771 crypt_safe_free(rnc.p[slot].password);
772 rnc.p[slot].password = NULL;
773 rnc.p[slot].passwordLen = 0;
775 if (r < 0 && r != -EPERM)
781 log_err(_("No key available with this passphrase.\n"));
786 static int init_keyfile(struct crypt_device *cd, int slot_check)
790 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
791 r = crypt_get_key(NULL, &rnc.p[slot].password, &rnc.p[slot].passwordLen,
792 opt_keyfile_offset, opt_keyfile_size, opt_key_file, 0, 0, cd);
796 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
797 rnc.p[slot].password, rnc.p[slot].passwordLen, 0);
800 * Allow keyslot only if it is last slot or if user explicitly
801 * specify whch slot to use (IOW others will be disabled).
803 if (r >= 0 && opt_key_slot == CRYPT_ANY_SLOT &&
804 crypt_keyslot_status(cd, r) != CRYPT_SLOT_ACTIVE_LAST) {
805 log_err(_("Key file can be used only with --key-slot or with "
806 "exactly one key slot active.\n"));
811 crypt_safe_free(rnc.p[slot].password);
812 rnc.p[slot].password = NULL;
813 rnc.p[slot].passwordLen = 0;
815 log_err(_("No key available with this passphrase.\n"));
823 static int initialize_passphrase(const char *device)
825 struct crypt_device *cd = NULL;
826 crypt_keyslot_info ki;
830 log_dbg("Passhrases initialization.");
832 if ((r = crypt_init(&cd, device)) ||
833 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
834 (r = crypt_set_data_device(cd, rnc.device))) {
840 r = init_keyfile(cd, opt_key_slot);
841 } else if (rnc.in_progress) {
842 r = init_passphrase1(cd, _("Enter any LUKS passphrase: "), CRYPT_ANY_SLOT);
843 } else for (i = 0; i < MAX_SLOT; i++) {
844 ki = crypt_keyslot_status(cd, i);
845 if (ki != CRYPT_SLOT_ACTIVE && ki != CRYPT_SLOT_ACTIVE_LAST)
848 snprintf(msg, sizeof(msg), _("Enter LUKS passphrase for key slot %u): "), i);
849 r = init_passphrase1(cd, msg, i);
855 return r > 0 ? 0 : r;
858 static int initialize_context(const char *device)
860 log_dbg("Initialising reencryption context.");
864 if (!(rnc.device = strndup(device, PATH_MAX)))
867 if (initialize_uuid()) {
868 log_err(_("Device %s is not a valid LUKS device.\n"), device);
872 /* Prepare device names */
873 if (snprintf(rnc.log_file, PATH_MAX,
874 "LUKS-%s.log", rnc.device_uuid) < 0)
876 if (snprintf(rnc.header_file_org, PATH_MAX,
877 "LUKS-%s.org", rnc.device_uuid) < 0)
879 if (snprintf(rnc.header_file_new, PATH_MAX,
880 "LUKS-%s.new", rnc.device_uuid) < 0)
883 /* Paths to encrypted devices */
884 if (snprintf(rnc.crypt_path_org, PATH_MAX,
885 "%s/%s", crypt_get_dir(), rnc.header_file_org) < 0)
887 if (snprintf(rnc.crypt_path_new, PATH_MAX,
888 "%s/%s", crypt_get_dir(), rnc.header_file_new) < 0)
893 if (open_log() < 0) {
894 log_err(_("Cannot open reencryption log file.\n"));
898 if (!rnc.in_progress) {
900 rnc.reencrypt_direction = FORWARD;
902 rnc.reencrypt_direction = BACKWARD;
903 rnc.device_offset = (uint64_t)~0;
910 static void destroy_context(void)
914 log_dbg("Destroying reencryption context.");
919 if ((rnc.reencrypt_direction == FORWARD &&
920 rnc.device_offset == rnc.device_size) ||
921 rnc.device_offset == 0) {
922 unlink(rnc.log_file);
923 unlink(rnc.header_file_org);
924 unlink(rnc.header_file_new);
927 for (i = 0; i < MAX_SLOT; i++)
928 crypt_safe_free(rnc.p[i].password);
931 free(rnc.device_uuid);
934 int run_reencrypt(const char *device)
937 if (initialize_context(device))
940 log_dbg("Running reencryption.");
942 if (!rnc.in_progress) {
943 if ((r = initialize_passphrase(rnc.device)) ||
944 (r = backup_luks_headers()) ||
945 (r = device_magic(MAKE_UNUSABLE)))
948 if ((r = initialize_passphrase(rnc.header_file_new)))
952 if ((r = activate_luks_headers()))
955 if ((r = copy_data()))
958 r = restore_luks_header(rnc.header_file_new);
964 static __attribute__ ((noreturn)) void usage(poptContext popt_context,
965 int exitcode, const char *error,
968 poptPrintUsage(popt_context, stderr, 0);
970 log_err("%s: %s\n", more, error);
971 poptFreeContext(popt_context);
975 static void help(poptContext popt_context,
976 enum poptCallbackReason reason __attribute__((unused)),
977 struct poptOption *key,
978 const char *arg __attribute__((unused)),
979 void *data __attribute__((unused)))
981 usage(popt_context, EXIT_SUCCESS, NULL, NULL);
984 static void _dbg_version_and_cmd(int argc, const char **argv)
988 log_std("# %s %s processing \"", PACKAGE_NAME, PACKAGE_VERSION);
989 for (i = 0; i < argc; i++) {
992 log_std("%s", argv[i]);
997 int main(int argc, const char **argv)
999 static struct poptOption popt_help_options[] = {
1000 { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL },
1001 { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL },
1002 { "usage", '\0', POPT_ARG_NONE, NULL, 0, N_("Display brief usage"), NULL },
1005 static struct poptOption popt_options[] = {
1006 { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL },
1007 { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL },
1008 { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL },
1009 { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL },
1010 { "block-size", 'B', POPT_ARG_INT, &opt_bsize, 0, N_("Reencryption block size"), N_("MiB") },
1011 { "cipher", 'c', POPT_ARG_STRING, &opt_cipher, 0, N_("The cipher used to encrypt the disk (see /proc/crypto)"), NULL },
1012 { "hash", 'h', POPT_ARG_STRING, &opt_hash, 0, N_("The hash used to create the encryption key from the passphrase"), NULL },
1013 { "key-file", 'd', POPT_ARG_STRING, &opt_key_file, 0, N_("Read the key from a file."), NULL },
1014 { "iter-time", 'i', POPT_ARG_INT, &opt_iteration_time, 0, N_("PBKDF2 iteration time for LUKS (in ms)"), N_("msecs") },
1015 { "batch-mode", 'q', POPT_ARG_NONE, &opt_batch_mode, 0, N_("Do not ask for confirmation"), NULL },
1016 { "tries", 'T', POPT_ARG_INT, &opt_tries, 0, N_("How often the input of the passphrase can be retried"), NULL },
1017 { "use-random", '\0', POPT_ARG_NONE, &opt_random, 0, N_("Use /dev/random for generating volume key."), NULL },
1018 { "use-urandom", '\0', POPT_ARG_NONE, &opt_urandom, 0, N_("Use /dev/urandom for generating volume key."), NULL },
1019 { "use-directio", '\0', POPT_ARG_NONE, &opt_directio, 0, N_("Use direct-io when accesing devices."), NULL },
1020 { "write-log", '\0', POPT_ARG_NONE, &opt_write_log, 0, N_("Update log file after every block."), NULL },
1021 { "key-slot", 'S', POPT_ARG_INT, &opt_key_slot, 0, N_("Use only this slot (others will be disabled)."), NULL },
1022 { "keyfile-offset", '\0', POPT_ARG_LONG, &opt_keyfile_offset, 0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
1023 { "keyfile-size", 'l', POPT_ARG_LONG, &opt_keyfile_size, 0, N_("Limits the read from keyfile"), N_("bytes") },
1026 poptContext popt_context;
1029 crypt_set_log_callback(NULL, _log, NULL);
1033 setlocale(LC_ALL, "");
1034 bindtextdomain(PACKAGE, LOCALEDIR);
1035 textdomain(PACKAGE);
1037 popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
1038 poptSetOtherOptionHelp(popt_context,
1039 N_("[OPTION...] <device>]"));
1041 while((r = poptGetNextOpt(popt_context)) > 0) {
1047 usage(popt_context, EXIT_FAILURE, poptStrerror(r),
1048 poptBadOption(popt_context, POPT_BADOPTION_NOALIAS));
1049 if (opt_version_mode) {
1050 log_std("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
1051 poptFreeContext(popt_context);
1055 if (!opt_batch_mode)
1056 log_err(_("WARNING: this is experimental code, it can completely break your data.\n"));
1058 action_argv = poptGetArgs(popt_context);
1060 usage(popt_context, EXIT_FAILURE, _("Argument required."),
1061 poptGetInvocationName(popt_context));
1063 if (opt_random && opt_urandom)
1064 usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
1065 poptGetInvocationName(popt_context));
1067 if (opt_bsize < 1 || opt_bsize > 64)
1068 usage(popt_context, EXIT_FAILURE,
1069 _("Only values between 1MiB and 64 MiB allowed for reencryption block size."),
1070 poptGetInvocationName(popt_context));
1074 crypt_set_debug_level(-1);
1075 _dbg_version_and_cmd(argc, argv);
1078 r = run_reencrypt(action_argv[0]);
1080 poptFreeContext(popt_context);
1082 /* Translate exit code to simple codes */
1084 case 0: r = EXIT_SUCCESS; break;
1086 case -EBUSY: r = 5; break;
1088 case -ENODEV: r = 4; break;
1089 case -ENOMEM: r = 3; break;
1090 case -EPERM: r = 2; break;
1095 default: r = EXIT_FAILURE;