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 PACKAGE_REENC "crypt_reencrypt"
22 #define _LARGEFILE64_SOURCE
23 #define _FILE_OFFSET_BITS 64
24 #define SECTOR_SIZE 512
35 #include <sys/ioctl.h>
38 #include <arpa/inet.h>
43 #include "cryptsetup.h"
45 static int opt_verbose = 0;
46 static int opt_debug = 0;
47 static const char *opt_cipher = NULL;
48 static const char *opt_hash = NULL;
49 static const char *opt_key_file = NULL;
50 static long opt_keyfile_size = 0;
51 static long opt_keyfile_offset = 0;
52 static int opt_iteration_time = 1000;
53 static int opt_batch_mode = 0;
54 static int opt_version_mode = 0;
55 static int opt_random = 0;
56 static int opt_urandom = 0;
57 static int opt_bsize = 4;
58 static int opt_directio = 0;
59 static int opt_fsync = 0;
60 static int opt_write_log = 0;
61 static int opt_tries = 3;
62 static int opt_key_slot = CRYPT_ANY_SLOT;
64 static const char **action_argv;
66 static volatile int quit = 0;
73 uint64_t device_offset;
74 uint64_t device_shift;
77 enum { FORWARD = 0, BACKWARD = 1 } reencrypt_direction;
79 char header_file_org[PATH_MAX];
80 char header_file_new[PATH_MAX];
81 char log_file[PATH_MAX];
83 char crypt_path_org[PATH_MAX];
84 char crypt_path_new[PATH_MAX];
94 struct timeval start_time, end_time;
95 uint64_t restart_bytes;
98 char MAGIC[] = {'L','U','K','S', 0xba, 0xbe};
99 char NOMAGIC[] = {'L','U','K','S', 0xde, 0xad};
109 __attribute__((format(printf, 5, 6)))
110 static void clogger(struct crypt_device *cd, int level, const char *file,
111 int line, const char *format, ...)
116 va_start(argp, format);
118 if (vasprintf(&target, format, argp) > 0) {
120 crypt_log(cd, level, target);
121 } else if (opt_debug)
122 printf("# %s\n", target);
129 static void _log(int level, const char *msg, void *usrptr __attribute__((unused)))
133 case CRYPT_LOG_NORMAL:
136 case CRYPT_LOG_VERBOSE:
140 case CRYPT_LOG_ERROR:
143 case CRYPT_LOG_DEBUG:
145 printf("# %s\n", msg);
148 fprintf(stderr, "Internal error on logging class for msg: %s", msg);
153 static void _quiet_log(int level, const char *msg, void *usrptr)
157 _log(level, msg, usrptr);
160 static void int_handler(int sig __attribute__((__unused__)))
165 static void set_int_block(int block)
167 sigset_t signals_open;
169 sigemptyset(&signals_open);
170 sigaddset(&signals_open, SIGINT);
171 sigaddset(&signals_open, SIGTERM);
172 sigprocmask(block ? SIG_SETMASK : SIG_UNBLOCK, &signals_open, NULL);
175 static void set_int_handler(void)
177 struct sigaction sigaction_open;
179 memset(&sigaction_open, 0, sizeof(struct sigaction));
180 sigaction_open.sa_handler = int_handler;
181 sigaction(SIGINT, &sigaction_open, 0);
182 sigaction(SIGTERM, &sigaction_open, 0);
186 /* The difference in seconds between two times in "timeval" format. */
187 static double time_diff(struct timeval start, struct timeval end)
189 return (end.tv_sec - start.tv_sec)
190 + (end.tv_usec - start.tv_usec) / 1E6;
193 static int alignment(int fd)
197 alignment = fpathconf(fd, _PC_REC_XFER_ALIGN);
203 /* Depends on the first two fields of LUKS1 header format, magic and version */
204 static int device_check(struct reenc_ctx *rc, header_magic set_magic)
211 devfd = open(rc->device, O_RDWR | O_EXCL | O_DIRECT);
213 if (errno == EBUSY) {
214 log_err(_("Cannot exclusively open %s, device in use.\n"),
218 log_err(_("Cannot open device %s\n"), rc->device);
222 if (set_magic == CHECK_OPEN) {
227 if (posix_memalign((void *)&buf, alignment(devfd), SECTOR_SIZE)) {
228 log_err(_("Allocation of aligned memory failed.\n"));
233 s = read(devfd, buf, SECTOR_SIZE);
234 if (s < 0 || s != SECTOR_SIZE) {
235 log_err(_("Cannot read device %s.\n"), rc->device);
240 /* Be sure that we do not process new version of header */
241 memcpy((void*)&version, &buf[MAGIC_L], sizeof(uint16_t));
242 version = ntohs(version);
244 if (set_magic == MAKE_UNUSABLE && !memcmp(buf, MAGIC, MAGIC_L) &&
246 log_verbose(_("Marking LUKS device %s unusable.\n"), rc->device);
247 memcpy(buf, NOMAGIC, MAGIC_L);
249 } else if (set_magic == MAKE_USABLE && !memcmp(buf, NOMAGIC, MAGIC_L) &&
251 log_verbose(_("Marking LUKS device %s usable.\n"), rc->device);
252 memcpy(buf, MAGIC, MAGIC_L);
254 } else if (set_magic == CHECK_UNUSABLE && version == 1) {
255 r = memcmp(buf, NOMAGIC, MAGIC_L) ? -EINVAL : 0;
257 rc->device_uuid = strndup(&buf[0xa8], 40);
263 if (lseek(devfd, 0, SEEK_SET) == -1)
265 s = write(devfd, buf, SECTOR_SIZE);
266 if (s < 0 || s != SECTOR_SIZE) {
267 log_err(_("Cannot write device %s.\n"), rc->device);
271 log_dbg("LUKS signature check failed for %s.", rc->device);
274 memset(buf, 0, SECTOR_SIZE);
280 static int create_empty_header(const char *new_file, const char *old_file)
287 if (stat(old_file, &st) == -1 ||
288 (st.st_mode & S_IFMT) != S_IFREG ||
289 (st.st_size > 16 * 1024 * 1024))
293 log_dbg("Creating empty file %s of size %lu.", new_file, (unsigned long)size);
295 if (!(buf = malloc(size)))
297 memset(buf, 0, size);
299 fd = creat(new_file, S_IRUSR|S_IWUSR);
305 if (write(fd, buf, size) < size)
313 static int write_log(struct reenc_ctx *rc)
317 memset(rc->log_buf, 0, SECTOR_SIZE);
318 snprintf(rc->log_buf, SECTOR_SIZE, "# LUKS reencryption log, DO NOT EDIT OR DELETE.\n"
319 "version = %d\nUUID = %s\ndirection = %d\n"
320 "offset = %" PRIu64 "\nshift = %" PRIu64 "\n# EOF\n",
321 1, rc->device_uuid, rc->reencrypt_direction,
322 rc->device_offset, rc->device_shift);
324 lseek(rc->log_fd, 0, SEEK_SET);
325 r = write(rc->log_fd, rc->log_buf, SECTOR_SIZE);
326 if (r < 0 || r != SECTOR_SIZE) {
327 log_err(_("Cannot write reencryption log file.\n"));
334 static int parse_line_log(struct reenc_ctx *rc, const char *line)
340 /* whole line is comment */
344 if (sscanf(line, "version = %d", &i) == 1) {
346 log_dbg("Log: Unexpected version = %i", i);
349 } else if (sscanf(line, "UUID = %40s", s) == 1) {
350 if (!rc->device_uuid || strcmp(rc->device_uuid, s)) {
351 log_dbg("Log: Unexpected UUID %s", s);
354 } else if (sscanf(line, "direction = %d", &i) == 1) {
355 log_dbg("Log: direction = %i", i);
356 rc->reencrypt_direction = i;
357 } else if (sscanf(line, "offset = %" PRIu64, &u64) == 1) {
358 log_dbg("Log: offset = %" PRIu64, u64);
359 rc->device_offset = u64;
360 } else if (sscanf(line, "shift = %" PRIu64, &u64) == 1) {
361 log_dbg("Log: shift = %" PRIu64, u64);
362 rc->device_shift = u64;
369 static int parse_log(struct reenc_ctx *rc)
374 s = read(rc->log_fd, rc->log_buf, SECTOR_SIZE);
376 log_err(_("Cannot read reencryption log file.\n"));
380 rc->log_buf[SECTOR_SIZE - 1] = '\0';
383 end = strchr(start, '\n');
386 if (parse_line_log(rc, start)) {
387 log_err("Wrong log format.\n");
398 static void close_log(struct reenc_ctx *rc)
400 log_dbg("Closing LUKS reencryption log file %s.", rc->log_file);
401 if (rc->log_fd != -1)
407 static int open_log(struct reenc_ctx *rc)
409 int flags, create_new;
412 if (!stat(rc->log_file, &st))
414 else if (errno == ENOENT)
420 log_dbg("Creating LUKS reencryption log file %s.", rc->log_file);
421 flags = opt_directio ? O_RDWR|O_CREAT|O_DIRECT : O_RDWR|O_CREAT;
422 rc->log_fd = open(rc->log_file, flags, S_IRUSR|S_IWUSR);
423 if (rc->log_fd == -1)
426 log_dbg("Log file %s exists, restarting.", rc->log_file);
427 flags = opt_directio ? O_RDWR|O_DIRECT : O_RDWR;
428 rc->log_fd = open(rc->log_file, flags);
429 if (rc->log_fd == -1)
434 if (posix_memalign((void *)&rc->log_buf, alignment(rc->log_fd), SECTOR_SIZE)) {
435 log_err(_("Allocation of aligned memory failed.\n"));
440 if (create_new && write_log(rc) < 0) {
445 /* Be sure it is correct format */
446 return parse_log(rc);
449 static int activate_luks_headers(struct reenc_ctx *rc)
451 struct crypt_device *cd = NULL, *cd_new = NULL;
454 log_dbg("Activating LUKS devices from headers.");
456 if ((r = crypt_init(&cd, rc->header_file_org)) ||
457 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
458 (r = crypt_set_data_device(cd, rc->device)))
461 if ((r = crypt_activate_by_passphrase(cd, rc->header_file_org,
462 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
463 CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
466 if ((r = crypt_init(&cd_new, rc->header_file_new)) ||
467 (r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
468 (r = crypt_set_data_device(cd_new, rc->device)))
471 if ((r = crypt_activate_by_passphrase(cd_new, rc->header_file_new,
472 opt_key_slot, rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen,
473 CRYPT_ACTIVATE_SHARED|CRYPT_ACTIVATE_PRIVATE)) < 0)
480 log_err(_("Activation of temporary devices failed.\n"));
484 static int backup_luks_headers(struct reenc_ctx *rc)
486 struct crypt_device *cd = NULL, *cd_new = NULL;
487 struct crypt_params_luks1 params = {0};
488 char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
491 log_dbg("Creating LUKS header backup for device %s.", rc->device);
493 if ((r = crypt_init(&cd, rc->device)) ||
494 (r = crypt_load(cd, CRYPT_LUKS1, NULL)))
497 crypt_set_confirm_callback(cd, NULL, NULL);
498 if ((r = crypt_header_backup(cd, CRYPT_LUKS1, rc->header_file_org)))
500 log_verbose(_("LUKS header backup of device %s created.\n"), rc->device);
502 if ((r = create_empty_header(rc->header_file_new, rc->header_file_org)))
505 params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
506 params.data_alignment = crypt_get_data_offset(cd);
507 params.data_device = rc->device;
509 if ((r = crypt_init(&cd_new, rc->header_file_new)))
513 crypt_set_rng_type(cd_new, CRYPT_RNG_RANDOM);
514 else if (opt_urandom)
515 crypt_set_rng_type(cd_new, CRYPT_RNG_URANDOM);
517 if (opt_iteration_time)
518 crypt_set_iteration_time(cd_new, opt_iteration_time);
521 r = crypt_parse_name_and_mode(opt_cipher, cipher, NULL, cipher_mode);
523 log_err(_("No known cipher specification pattern detected.\n"));
528 if ((r = crypt_format(cd_new, CRYPT_LUKS1,
529 opt_cipher ? cipher : crypt_get_cipher(cd),
530 opt_cipher ? cipher_mode : crypt_get_cipher_mode(cd),
532 NULL, crypt_get_volume_key_size(cd), ¶ms)))
534 log_verbose(_("New LUKS header for device %s created.\n"), rc->device);
536 for (i = 0; i < MAX_SLOT; i++) {
537 if (!rc->p[i].password)
539 if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
540 NULL, 0, rc->p[i].password, rc->p[i].passwordLen)) < 0)
542 log_verbose(_("Activated keyslot %i.\n"), r);
549 log_err(_("Creation of LUKS backup headers failed.\n"));
553 static void remove_headers(struct reenc_ctx *rc)
555 struct crypt_device *cd = NULL;
557 log_dbg("Removing headers.");
559 if (crypt_init(&cd, NULL))
561 crypt_set_log_callback(cd, _quiet_log, NULL);
562 if (*rc->header_file_org)
563 (void)crypt_deactivate(cd, rc->header_file_org);
564 if (*rc->header_file_new)
565 (void)crypt_deactivate(cd, rc->header_file_new);
569 static int restore_luks_header(struct reenc_ctx *rc)
571 struct crypt_device *cd = NULL;
574 log_dbg("Restoring header for %s from %s.", rc->device, rc->header_file_new);
576 r = crypt_init(&cd, rc->device);
578 crypt_set_confirm_callback(cd, NULL, NULL);
579 r = crypt_header_restore(cd, CRYPT_LUKS1, rc->header_file_new);
584 log_err(_("Cannot restore LUKS header on device %s.\n"), rc->device);
586 log_verbose(_("LUKS header on device %s restored.\n"), rc->device);
590 static void print_progress(struct reenc_ctx *rc, uint64_t bytes, int final)
592 unsigned long long mbytes, eta;
593 struct timeval now_time;
596 gettimeofday(&now_time, NULL);
597 if (!final && time_diff(rc->end_time, now_time) < 0.5)
600 rc->end_time = now_time;
605 tdiff = time_diff(rc->start_time, rc->end_time);
609 mbytes = (bytes - rc->restart_bytes) / 1024 / 1024;
610 mib = (double)(mbytes) / tdiff;
614 eta = (unsigned long long)(rc->device_size / 1024 / 1024 / mib - tdiff);
616 /* vt100 code clear line */
618 log_err(_("Progress: %5.1f%%, ETA %02llu:%02llu, "
619 "%4llu MiB written, speed %5.1f MiB/s%s"),
620 (double)bytes / rc->device_size * 100,
621 eta / 60, eta % 60, mbytes, mib,
625 static int copy_data_forward(struct reenc_ctx *rc, int fd_old, int fd_new,
626 size_t block_size, void *buf, uint64_t *bytes)
630 log_dbg("Reencrypting in forward direction.");
632 if (lseek64(fd_old, rc->device_offset, SEEK_SET) < 0 ||
633 lseek64(fd_new, rc->device_offset, SEEK_SET) < 0) {
634 log_err(_("Cannot seek to device offset.\n"));
638 rc->restart_bytes = *bytes = rc->device_offset;
640 if (write_log(rc) < 0)
643 while (!quit && rc->device_offset < rc->device_size) {
644 s1 = read(fd_old, buf, block_size);
645 if (s1 < 0 || ((size_t)s1 != block_size &&
646 (rc->device_offset + s1) != rc->device_size)) {
647 log_dbg("Read error, expecting %d, got %d.",
648 (int)block_size, (int)s1);
652 s2 = write(fd_new, buf, s1);
654 log_dbg("Write error, expecting %d, got %d.",
655 (int)block_size, (int)s2);
659 rc->device_offset += s1;
660 if (opt_write_log && write_log(rc) < 0)
663 if (opt_fsync && fsync(fd_new) < 0) {
664 log_dbg("Write error, fsync.");
668 *bytes += (uint64_t)s2;
669 print_progress(rc, *bytes, 0);
672 return quit ? -EAGAIN : 0;
675 static int copy_data_backward(struct reenc_ctx *rc, int fd_old, int fd_new,
676 size_t block_size, void *buf, uint64_t *bytes)
678 ssize_t s1, s2, working_block;
679 off64_t working_offset;
681 log_dbg("Reencrypting in backward direction.");
683 if (!rc->in_progress) {
684 rc->device_offset = rc->device_size;
685 rc->restart_bytes = 0;
688 rc->restart_bytes = rc->device_size - rc->device_offset;
689 *bytes = rc->restart_bytes;
692 if (write_log(rc) < 0)
695 while (!quit && rc->device_offset) {
696 if (rc->device_offset < block_size) {
698 working_block = rc->device_offset;
700 working_offset = rc->device_offset - block_size;
701 working_block = block_size;
704 if (lseek64(fd_old, working_offset, SEEK_SET) < 0 ||
705 lseek64(fd_new, working_offset, SEEK_SET) < 0) {
706 log_err(_("Cannot seek to device offset.\n"));
710 s1 = read(fd_old, buf, working_block);
711 if (s1 < 0 || (s1 != working_block)) {
712 log_dbg("Read error, expecting %d, got %d.",
713 (int)block_size, (int)s1);
717 s2 = write(fd_new, buf, working_block);
719 log_dbg("Write error, expecting %d, got %d.",
720 (int)block_size, (int)s2);
724 rc->device_offset -= s1;
725 if (opt_write_log && write_log(rc) < 0)
728 if (opt_fsync && fsync(fd_new) < 0) {
729 log_dbg("Write error, fsync.");
733 *bytes += (uint64_t)s2;
734 print_progress(rc, *bytes, 0);
737 return quit ? -EAGAIN : 0;
740 static int copy_data(struct reenc_ctx *rc)
742 size_t block_size = opt_bsize * 1024 * 1024;
743 int fd_old = -1, fd_new = -1;
748 log_dbg("Data copy preparation.");
750 fd_old = open(rc->crypt_path_org, O_RDONLY | (opt_directio ? O_DIRECT : 0));
752 log_err(_("Cannot open temporary LUKS header file.\n"));
756 fd_new = open(rc->crypt_path_new, O_WRONLY | (opt_directio ? O_DIRECT : 0));
758 log_err(_("Cannot open temporary LUKS header file.\n"));
763 if (ioctl(fd_old, BLKGETSIZE64, &rc->device_size) < 0) {
764 log_err(_("Cannot get device size.\n"));
768 if (posix_memalign((void *)&buf, alignment(fd_new), block_size)) {
769 log_err(_("Allocation of aligned memory failed.\n"));
775 gettimeofday(&rc->start_time, NULL);
777 if (rc->reencrypt_direction == FORWARD)
778 r = copy_data_forward(rc, fd_old, fd_new, block_size, buf, &bytes);
780 r = copy_data_backward(rc, fd_old, fd_new, block_size, buf, &bytes);
783 print_progress(rc, bytes, 1);
786 log_err(_("Interrupted by a signal.\n"));
788 log_err(_("IO error during reencryption.\n"));
800 static int initialize_uuid(struct reenc_ctx *rc)
802 struct crypt_device *cd = NULL;
805 log_dbg("Initialising UUID.");
807 /* Try to load LUKS from device */
808 if ((r = crypt_init(&cd, rc->device)))
810 crypt_set_log_callback(cd, _quiet_log, NULL);
811 r = crypt_load(cd, CRYPT_LUKS1, NULL);
813 rc->device_uuid = strdup(crypt_get_uuid(cd));
815 /* Reencryption already in progress - magic header? */
816 r = device_check(rc, CHECK_UNUSABLE);
822 static int init_passphrase1(struct reenc_ctx *rc, struct crypt_device *cd,
823 const char *msg, int slot_check)
825 int r = -EINVAL, slot, retry_count;
827 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
829 retry_count = opt_tries ?: 1;
830 while (retry_count--) {
832 r = crypt_get_key(msg, &rc->p[slot].password,
833 &rc->p[slot].passwordLen,
834 0, 0, NULL /*opt_key_file*/,
841 /* library uses sigint internally, until it is fixed...*/
843 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
844 rc->p[slot].password, rc->p[slot].passwordLen, 0);
847 crypt_safe_free(rc->p[slot].password);
848 rc->p[slot].password = NULL;
849 rc->p[slot].passwordLen = 0;
851 if (r < 0 && r != -EPERM)
857 log_err(_("No key available with this passphrase.\n"));
862 static int init_keyfile(struct reenc_ctx *rc, struct crypt_device *cd, int slot_check)
866 slot = (slot_check == CRYPT_ANY_SLOT) ? 0 : slot_check;
867 r = crypt_get_key(NULL, &rc->p[slot].password, &rc->p[slot].passwordLen,
868 opt_keyfile_offset, opt_keyfile_size, opt_key_file, 0, 0, cd);
872 r = crypt_activate_by_passphrase(cd, NULL, slot_check,
873 rc->p[slot].password, rc->p[slot].passwordLen, 0);
876 * Allow keyslot only if it is last slot or if user explicitly
877 * specify whch slot to use (IOW others will be disabled).
879 if (r >= 0 && opt_key_slot == CRYPT_ANY_SLOT &&
880 crypt_keyslot_status(cd, r) != CRYPT_SLOT_ACTIVE_LAST) {
881 log_err(_("Key file can be used only with --key-slot or with "
882 "exactly one key slot active.\n"));
887 crypt_safe_free(rc->p[slot].password);
888 rc->p[slot].password = NULL;
889 rc->p[slot].passwordLen = 0;
891 log_err(_("No key available with this passphrase.\n"));
899 static int initialize_passphrase(struct reenc_ctx *rc, const char *device)
901 struct crypt_device *cd = NULL;
902 crypt_keyslot_info ki;
906 log_dbg("Passhrases initialization.");
908 if ((r = crypt_init(&cd, device)) ||
909 (r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
910 (r = crypt_set_data_device(cd, rc->device))) {
916 r = init_keyfile(rc, cd, opt_key_slot);
917 } else if (rc->in_progress) {
918 r = init_passphrase1(rc, cd, _("Enter any LUKS passphrase: "), CRYPT_ANY_SLOT);
919 } else for (i = 0; i < MAX_SLOT; i++) {
920 ki = crypt_keyslot_status(cd, i);
921 if (ki != CRYPT_SLOT_ACTIVE && ki != CRYPT_SLOT_ACTIVE_LAST)
924 snprintf(msg, sizeof(msg), _("Enter LUKS passphrase for key slot %u: "), i);
925 r = init_passphrase1(rc, cd, msg, i);
931 return r > 0 ? 0 : r;
934 static int initialize_context(struct reenc_ctx *rc, const char *device)
936 log_dbg("Initialising reencryption context.");
940 if (!(rc->device = strndup(device, PATH_MAX)))
943 if (device_check(rc, CHECK_OPEN) < 0)
946 if (initialize_uuid(rc)) {
947 log_err(_("Device %s is not a valid LUKS device.\n"), device);
951 /* Prepare device names */
952 if (snprintf(rc->log_file, PATH_MAX,
953 "LUKS-%s.log", rc->device_uuid) < 0)
955 if (snprintf(rc->header_file_org, PATH_MAX,
956 "LUKS-%s.org", rc->device_uuid) < 0)
958 if (snprintf(rc->header_file_new, PATH_MAX,
959 "LUKS-%s.new", rc->device_uuid) < 0)
962 /* Paths to encrypted devices */
963 if (snprintf(rc->crypt_path_org, PATH_MAX,
964 "%s/%s", crypt_get_dir(), rc->header_file_org) < 0)
966 if (snprintf(rc->crypt_path_new, PATH_MAX,
967 "%s/%s", crypt_get_dir(), rc->header_file_new) < 0)
972 if (open_log(rc) < 0) {
973 log_err(_("Cannot open reencryption log file.\n"));
977 if (!rc->in_progress) {
979 rc->reencrypt_direction = FORWARD;
981 rc->reencrypt_direction = BACKWARD;
982 rc->device_offset = (uint64_t)~0;
989 static void destroy_context(struct reenc_ctx *rc)
993 log_dbg("Destroying reencryption context.");
998 if ((rc->reencrypt_direction == FORWARD &&
999 rc->device_offset == rc->device_size) ||
1000 (rc->reencrypt_direction == BACKWARD &&
1001 rc->device_offset == 0)) {
1002 unlink(rc->log_file);
1003 unlink(rc->header_file_org);
1004 unlink(rc->header_file_new);
1007 for (i = 0; i < MAX_SLOT; i++)
1008 crypt_safe_free(rc->p[i].password);
1011 free(rc->device_uuid);
1014 static int run_reencrypt(const char *device)
1017 struct reenc_ctx rc = {};
1019 if (initialize_context(&rc, device))
1022 log_dbg("Running reencryption.");
1024 if (!rc.in_progress) {
1025 if ((r = initialize_passphrase(&rc, rc.device)) ||
1026 (r = backup_luks_headers(&rc)) ||
1027 (r = device_check(&rc, MAKE_UNUSABLE)))
1030 if ((r = initialize_passphrase(&rc, rc.header_file_new)))
1034 if ((r = activate_luks_headers(&rc)))
1037 if ((r = copy_data(&rc)))
1040 r = restore_luks_header(&rc);
1042 destroy_context(&rc);
1046 static __attribute__ ((noreturn)) void usage(poptContext popt_context,
1047 int exitcode, const char *error,
1050 poptPrintUsage(popt_context, stderr, 0);
1052 log_err("%s: %s\n", more, error);
1053 poptFreeContext(popt_context);
1057 static void help(poptContext popt_context,
1058 enum poptCallbackReason reason __attribute__((unused)),
1059 struct poptOption *key,
1060 const char *arg __attribute__((unused)),
1061 void *data __attribute__((unused)))
1063 usage(popt_context, EXIT_SUCCESS, NULL, NULL);
1066 static void _dbg_version_and_cmd(int argc, const char **argv)
1070 log_std("# %s %s processing \"", PACKAGE_REENC, PACKAGE_VERSION);
1071 for (i = 0; i < argc; i++) {
1074 log_std("%s", argv[i]);
1079 int main(int argc, const char **argv)
1081 static struct poptOption popt_help_options[] = {
1082 { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL },
1083 { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL },
1084 { "usage", '\0', POPT_ARG_NONE, NULL, 0, N_("Display brief usage"), NULL },
1087 static struct poptOption popt_options[] = {
1088 { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL },
1089 { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL },
1090 { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL },
1091 { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL },
1092 { "block-size", 'B', POPT_ARG_INT, &opt_bsize, 0, N_("Reencryption block size"), N_("MiB") },
1093 { "cipher", 'c', POPT_ARG_STRING, &opt_cipher, 0, N_("The cipher used to encrypt the disk (see /proc/crypto)"), NULL },
1094 { "hash", 'h', POPT_ARG_STRING, &opt_hash, 0, N_("The hash used to create the encryption key from the passphrase"), NULL },
1095 { "key-file", 'd', POPT_ARG_STRING, &opt_key_file, 0, N_("Read the key from a file."), NULL },
1096 { "iter-time", 'i', POPT_ARG_INT, &opt_iteration_time, 0, N_("PBKDF2 iteration time for LUKS (in ms)"), N_("msecs") },
1097 { "batch-mode", 'q', POPT_ARG_NONE, &opt_batch_mode, 0, N_("Do not ask for confirmation"), NULL },
1098 { "tries", 'T', POPT_ARG_INT, &opt_tries, 0, N_("How often the input of the passphrase can be retried"), NULL },
1099 { "use-random", '\0', POPT_ARG_NONE, &opt_random, 0, N_("Use /dev/random for generating volume key."), NULL },
1100 { "use-urandom", '\0', POPT_ARG_NONE, &opt_urandom, 0, N_("Use /dev/urandom for generating volume key."), NULL },
1101 { "use-directio", '\0', POPT_ARG_NONE, &opt_directio, 0, N_("Use direct-io when accesing devices."), NULL },
1102 { "use-fsync", '\0', POPT_ARG_NONE, &opt_fsync, 0, N_("Use fsync after each block."), NULL },
1103 { "write-log", '\0', POPT_ARG_NONE, &opt_write_log, 0, N_("Update log file after every block."), NULL },
1104 { "key-slot", 'S', POPT_ARG_INT, &opt_key_slot, 0, N_("Use only this slot (others will be disabled)."), NULL },
1105 { "keyfile-offset", '\0', POPT_ARG_LONG, &opt_keyfile_offset, 0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
1106 { "keyfile-size", 'l', POPT_ARG_LONG, &opt_keyfile_size, 0, N_("Limits the read from keyfile"), N_("bytes") },
1109 poptContext popt_context;
1112 crypt_set_log_callback(NULL, _log, NULL);
1116 setlocale(LC_ALL, "");
1117 bindtextdomain(PACKAGE, LOCALEDIR);
1118 textdomain(PACKAGE);
1120 popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
1121 poptSetOtherOptionHelp(popt_context,
1122 N_("[OPTION...] <device>]"));
1124 while((r = poptGetNextOpt(popt_context)) > 0) ;
1126 usage(popt_context, EXIT_FAILURE, poptStrerror(r),
1127 poptBadOption(popt_context, POPT_BADOPTION_NOALIAS));
1129 if (opt_version_mode) {
1130 log_std("%s %s\n", PACKAGE_REENC, PACKAGE_VERSION);
1131 poptFreeContext(popt_context);
1135 if (!opt_batch_mode) {
1136 log_std(_("WARNING: this is experimental code, it can completely break your data.\n"));
1137 log_verbose(_("Reencryption will change: volume key%s%s%s%s.\n"),
1138 opt_hash ? _(", set hash to ") : "", opt_hash ?: "",
1139 opt_cipher ? _(", set cipher to "): "", opt_cipher ?: "");
1142 action_argv = poptGetArgs(popt_context);
1144 usage(popt_context, EXIT_FAILURE, _("Argument required."),
1145 poptGetInvocationName(popt_context));
1147 if (opt_random && opt_urandom)
1148 usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
1149 poptGetInvocationName(popt_context));
1151 if (opt_bsize < 1 || opt_bsize > 64)
1152 usage(popt_context, EXIT_FAILURE,
1153 _("Only values between 1MiB and 64 MiB allowed for reencryption block size."),
1154 poptGetInvocationName(popt_context));
1158 crypt_set_debug_level(-1);
1159 _dbg_version_and_cmd(argc, argv);
1162 r = run_reencrypt(action_argv[0]);
1164 poptFreeContext(popt_context);
1166 /* Translate exit code to simple codes */
1168 case 0: r = EXIT_SUCCESS; break;
1170 case -EBUSY: r = 5; break;
1172 case -ENODEV: r = 4; break;
1173 case -ENOMEM: r = 3; break;
1174 case -EPERM: r = 2; break;
1175 default: r = EXIT_FAILURE;