src/cryptsetup/cryptsetup.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <libcryptsetup.h>
  22 #include <mntent.h>
  23 #include <string.h>
  24 #include <sys/mman.h>
  25
  26 #include "sd-device.h"
  27
  28 #include "alloc-util.h"
  29 #include "ask-password-api.h"
  30 #include "device-util.h"
  31 #include "escape.h"
  32 #include "fileio.h"
  33 #include "log.h"
  34 #include "mount-util.h"
  35 #include "parse-util.h"
  36 #include "path-util.h"
  37 #include "string-util.h"
  38 #include "strv.h"
  39 #include "util.h"
  40
  41 static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */
  42 static char *arg_cipher = NULL;
  43 static unsigned arg_key_size = 0;
  44 static int arg_key_slot = CRYPT_ANY_SLOT;
  45 static unsigned arg_keyfile_size = 0;
  46 static unsigned arg_keyfile_offset = 0;
  47 static char *arg_hash = NULL;
  48 static char *arg_header = NULL;
  49 static unsigned arg_tries = 3;
  50 static bool arg_readonly = false;
  51 static bool arg_verify = false;
  52 static bool arg_discards = false;
  53 static bool arg_tcrypt_hidden = false;
  54 static bool arg_tcrypt_system = false;
  55 #ifdef CRYPT_TCRYPT_VERA_MODES
  56 static bool arg_tcrypt_veracrypt = false;
  57 #endif
  58 static char **arg_tcrypt_keyfiles = NULL;
  59 static uint64_t arg_offset = 0;
  60 static uint64_t arg_skip = 0;
  61 static usec_t arg_timeout = USEC_INFINITY;
  62
  63 /* Options Debian's crypttab knows we don't:
  64
  65     precheck=
  66     check=
  67     checkargs=
  68     noearly=
  69     loud=
  70     keyscript=
  71 */
  72
  73 static int parse_one_option(const char *option) {
  74         const char *val;
  75         int r;
  76
  77         assert(option);
  78
  79         /* Handled outside of this tool */
  80         if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev"))
  81                 return 0;
  82
  83         if ((val = startswith(option, "cipher="))) {
  84                 r = free_and_strdup(&arg_cipher, val);
  85                 if (r < 0)
  86                         return log_oom();
  87
  88         } else if ((val = startswith(option, "size="))) {
  89
  90                 r = safe_atou(val, &arg_key_size);
  91                 if (r < 0) {
  92                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
  93                         return 0;
  94                 }
  95
  96                 if (arg_key_size % 8) {
  97                         log_error("size= not a multiple of 8, ignoring.");
  98                         return 0;
  99                 }
 100
 101                 arg_key_size /= 8;
 102
 103         } else if ((val = startswith(option, "key-slot="))) {
 104
 105                 arg_type = CRYPT_LUKS1;
 106                 r = safe_atoi(val, &arg_key_slot);
 107                 if (r < 0) {
 108                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 109                         return 0;
 110                 }
 111
 112         } else if ((val = startswith(option, "tcrypt-keyfile="))) {
 113
 114                 arg_type = CRYPT_TCRYPT;
 115                 if (path_is_absolute(val)) {
 116                         if (strv_extend(&arg_tcrypt_keyfiles, val) < 0)
 117                                 return log_oom();
 118                 } else
 119                         log_error("Key file path \"%s\" is not absolute. Ignoring.", val);
 120
 121         } else if ((val = startswith(option, "keyfile-size="))) {
 122
 123                 r = safe_atou(val, &arg_keyfile_size);
 124                 if (r < 0) {
 125                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 126                         return 0;
 127                 }
 128
 129         } else if ((val = startswith(option, "keyfile-offset="))) {
 130
 131                 r = safe_atou(val, &arg_keyfile_offset);
 132                 if (r < 0) {
 133                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 134                         return 0;
 135                 }
 136
 137         } else if ((val = startswith(option, "hash="))) {
 138                 r = free_and_strdup(&arg_hash, val);
 139                 if (r < 0)
 140                         return log_oom();
 141
 142         } else if ((val = startswith(option, "header="))) {
 143                 arg_type = CRYPT_LUKS1;
 144
 145                 if (!path_is_absolute(val)) {
 146                         log_error("Header path \"%s\" is not absolute, refusing.", val);
 147                         return -EINVAL;
 148                 }
 149
 150                 if (arg_header) {
 151                         log_error("Duplicate header= option, refusing.");
 152                         return -EINVAL;
 153                 }
 154
 155                 arg_header = strdup(val);
 156                 if (!arg_header)
 157                         return log_oom();
 158
 159         } else if ((val = startswith(option, "tries="))) {
 160
 161                 r = safe_atou(val, &arg_tries);
 162                 if (r < 0) {
 163                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 164                         return 0;
 165                 }
 166
 167         } else if (STR_IN_SET(option, "readonly", "read-only"))
 168                 arg_readonly = true;
 169         else if (streq(option, "verify"))
 170                 arg_verify = true;
 171         else if (STR_IN_SET(option, "allow-discards", "discard"))
 172                 arg_discards = true;
 173         else if (streq(option, "luks"))
 174                 arg_type = CRYPT_LUKS1;
 175         else if (streq(option, "tcrypt"))
 176                 arg_type = CRYPT_TCRYPT;
 177         else if (streq(option, "tcrypt-hidden")) {
 178                 arg_type = CRYPT_TCRYPT;
 179                 arg_tcrypt_hidden = true;
 180         } else if (streq(option, "tcrypt-system")) {
 181                 arg_type = CRYPT_TCRYPT;
 182                 arg_tcrypt_system = true;
 183         } else if (streq(option, "tcrypt-veracrypt")) {
 184 #ifdef CRYPT_TCRYPT_VERA_MODES
 185                 arg_type = CRYPT_TCRYPT;
 186                 arg_tcrypt_veracrypt = true;
 187 #else
 188                 log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing.");
 189                 return -EINVAL;
 190 #endif
 191         } else if (STR_IN_SET(option, "plain", "swap", "tmp"))
 192                 arg_type = CRYPT_PLAIN;
 193         else if ((val = startswith(option, "timeout="))) {
 194
 195                 r = parse_sec_fix_0(val, &arg_timeout);
 196                 if (r < 0) {
 197                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 198                         return 0;
 199                 }
 200
 201         } else if ((val = startswith(option, "offset="))) {
 202
 203                 r = safe_atou64(val, &arg_offset);
 204                 if (r < 0)
 205                         return log_error_errno(r, "Failed to parse %s: %m", option);
 206
 207         } else if ((val = startswith(option, "skip="))) {
 208
 209                 r = safe_atou64(val, &arg_skip);
 210                 if (r < 0)
 211                         return log_error_errno(r, "Failed to parse %s: %m", option);
 212
 213         } else if (!streq(option, "none"))
 214                 log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
 215
 216         return 0;
 217 }
 218
 219 static int parse_options(const char *options) {
 220         const char *word, *state;
 221         size_t l;
 222         int r;
 223
 224         assert(options);
 225
 226         FOREACH_WORD_SEPARATOR(word, l, options, ",", state) {
 227                 _cleanup_free_ char *o;
 228
 229                 o = strndup(word, l);
 230                 if (!o)
 231                         return -ENOMEM;
 232                 r = parse_one_option(o);
 233                 if (r < 0)
 234                         return r;
 235         }
 236
 237         /* sanity-check options */
 238         if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) {
 239                 if (arg_offset)
 240                       log_warning("offset= ignored with type %s", arg_type);
 241                 if (arg_skip)
 242                       log_warning("skip= ignored with type %s", arg_type);
 243         }
 244
 245         return 0;
 246 }
 247
 248 static void log_glue(int level, const char *msg, void *usrptr) {
 249         log_debug("%s", msg);
 250 }
 251
 252 static int disk_major_minor(const char *path, char **ret) {
 253         struct stat st;
 254
 255         assert(path);
 256
 257         if (stat(path, &st) < 0)
 258                 return -errno;
 259
 260         if (!S_ISBLK(st.st_mode))
 261                 return -EINVAL;
 262
 263         if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0)
 264                 return -errno;
 265
 266         return 0;
 267 }
 268
 269 static char* disk_description(const char *path) {
 270
 271         static const char name_fields[] =
 272                 "ID_PART_ENTRY_NAME\0"
 273                 "DM_NAME\0"
 274                 "ID_MODEL_FROM_DATABASE\0"
 275                 "ID_MODEL\0";
 276
 277         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 278         struct stat st;
 279         const char *i;
 280         int r;
 281
 282         assert(path);
 283
 284         if (stat(path, &st) < 0)
 285                 return NULL;
 286
 287         if (!S_ISBLK(st.st_mode))
 288                 return NULL;
 289
 290         r = sd_device_new_from_devnum(&device, 'b', st.st_rdev);
 291         if (r < 0)
 292                 return NULL;
 293
 294         NULSTR_FOREACH(i, name_fields) {
 295                 const char *name;
 296
 297                 r = sd_device_get_property_value(device, i, &name);
 298                 if (r >= 0 && !isempty(name))
 299                         return strdup(name);
 300         }
 301
 302         return NULL;
 303 }
 304
 305 static char *disk_mount_point(const char *label) {
 306         _cleanup_free_ char *device = NULL;
 307         _cleanup_endmntent_ FILE *f = NULL;
 308         struct mntent *m;
 309
 310         /* Yeah, we don't support native systemd unit files here for now */
 311
 312         if (asprintf(&device, "/dev/mapper/%s", label) < 0)
 313                 return NULL;
 314
 315         f = setmntent("/etc/fstab", "re");
 316         if (!f)
 317                 return NULL;
 318
 319         while ((m = getmntent(f)))
 320                 if (path_equal(m->mnt_fsname, device))
 321                         return strdup(m->mnt_dir);
 322
 323         return NULL;
 324 }
 325
 326 static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) {
 327         _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL;
 328         _cleanup_strv_free_erase_ char **passwords = NULL;
 329         const char *name = NULL;
 330         char **p, *id;
 331         int r = 0;
 332
 333         assert(vol);
 334         assert(src);
 335         assert(ret);
 336
 337         description = disk_description(src);
 338         mount_point = disk_mount_point(vol);
 339
 340         if (description && streq(vol, description))
 341                 /* If the description string is simply the
 342                  * volume name, then let's not show this
 343                  * twice */
 344                 description = mfree(description);
 345
 346         if (mount_point && description)
 347                 r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point);
 348         else if (mount_point)
 349                 r = asprintf(&name_buffer, "%s on %s", vol, mount_point);
 350         else if (description)
 351                 r = asprintf(&name_buffer, "%s (%s)", description, vol);
 352
 353         if (r < 0)
 354                 return log_oom();
 355
 356         name = name_buffer ? name_buffer : vol;
 357
 358         if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
 359                 return log_oom();
 360
 361         if (src)
 362                 (void) disk_major_minor(src, &maj_min);
 363
 364         if (maj_min) {
 365                 escaped_name = maj_min;
 366                 maj_min = NULL;
 367         } else
 368                 escaped_name = cescape(name);
 369
 370         if (!escaped_name)
 371                 return log_oom();
 372
 373         id = strjoina("cryptsetup:", escaped_name);
 374
 375         r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until,
 376                               ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED),
 377                               &passwords);
 378         if (r < 0)
 379                 return log_error_errno(r, "Failed to query password: %m");
 380
 381         if (arg_verify) {
 382                 _cleanup_strv_free_erase_ char **passwords2 = NULL;
 383
 384                 assert(strv_length(passwords) == 1);
 385
 386                 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
 387                         return log_oom();
 388
 389                 id = strjoina("cryptsetup-verification:", escaped_name);
 390
 391                 r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2);
 392                 if (r < 0)
 393                         return log_error_errno(r, "Failed to query verification password: %m");
 394
 395                 assert(strv_length(passwords2) == 1);
 396
 397                 if (!streq(passwords[0], passwords2[0])) {
 398                         log_warning("Passwords did not match, retrying.");
 399                         return -EAGAIN;
 400                 }
 401         }
 402
 403         strv_uniq(passwords);
 404
 405         STRV_FOREACH(p, passwords) {
 406                 char *c;
 407
 408                 if (strlen(*p)+1 >= arg_key_size)
 409                         continue;
 410
 411                 /* Pad password if necessary */
 412                 c = new(char, arg_key_size);
 413                 if (!c)
 414                         return log_oom();
 415
 416                 strncpy(c, *p, arg_key_size);
 417                 free(*p);
 418                 *p = c;
 419         }
 420
 421         *ret = passwords;
 422         passwords = NULL;
 423
 424         return 0;
 425 }
 426
 427 static int attach_tcrypt(
 428                 struct crypt_device *cd,
 429                 const char *name,
 430                 const char *key_file,
 431                 char **passwords,
 432                 uint32_t flags) {
 433
 434         int r = 0;
 435         _cleanup_free_ char *passphrase = NULL;
 436         struct crypt_params_tcrypt params = {
 437                 .flags = CRYPT_TCRYPT_LEGACY_MODES,
 438                 .keyfiles = (const char **)arg_tcrypt_keyfiles,
 439                 .keyfiles_count = strv_length(arg_tcrypt_keyfiles)
 440         };
 441
 442         assert(cd);
 443         assert(name);
 444         assert(key_file || (passwords && passwords[0]));
 445
 446         if (arg_tcrypt_hidden)
 447                 params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER;
 448
 449         if (arg_tcrypt_system)
 450                 params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER;
 451
 452 #ifdef CRYPT_TCRYPT_VERA_MODES
 453         if (arg_tcrypt_veracrypt)
 454                 params.flags |= CRYPT_TCRYPT_VERA_MODES;
 455 #endif
 456
 457         if (key_file) {
 458                 r = read_one_line_file(key_file, &passphrase);
 459                 if (r < 0) {
 460                         log_error_errno(r, "Failed to read password file '%s': %m", key_file);
 461                         return -EAGAIN;
 462                 }
 463
 464                 params.passphrase = passphrase;
 465         } else
 466                 params.passphrase = passwords[0];
 467         params.passphrase_size = strlen(params.passphrase);
 468
 469         r = crypt_load(cd, CRYPT_TCRYPT, &params);
 470         if (r < 0) {
 471                 if (key_file && r == -EPERM) {
 472                         log_error("Failed to activate using password file '%s'.", key_file);
 473                         return -EAGAIN;
 474                 }
 475                 return r;
 476         }
 477
 478         return crypt_activate_by_volume_key(cd, name, NULL, 0, flags);
 479 }
 480
 481 static int attach_luks_or_plain(struct crypt_device *cd,
 482                                 const char *name,
 483                                 const char *key_file,
 484                                 const char *data_device,
 485                                 char **passwords,
 486                                 uint32_t flags) {
 487         int r = 0;
 488         bool pass_volume_key = false;
 489
 490         assert(cd);
 491         assert(name);
 492         assert(key_file || passwords);
 493
 494         if (!arg_type || streq(arg_type, CRYPT_LUKS1)) {
 495                 r = crypt_load(cd, CRYPT_LUKS1, NULL);
 496                 if (r < 0) {
 497                         log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd));
 498                         return r;
 499                 }
 500
 501                 if (data_device)
 502                         r = crypt_set_data_device(cd, data_device);
 503         }
 504
 505         if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) {
 506                 struct crypt_params_plain params = {
 507                         .offset = arg_offset,
 508                         .skip = arg_skip,
 509                 };
 510                 const char *cipher, *cipher_mode;
 511                 _cleanup_free_ char *truncated_cipher = NULL;
 512
 513                 if (arg_hash) {
 514                         /* plain isn't a real hash type. it just means "use no hash" */
 515                         if (!streq(arg_hash, "plain"))
 516                                 params.hash = arg_hash;
 517                 } else if (!key_file)
 518                         /* for CRYPT_PLAIN, the behaviour of cryptsetup
 519                          * package is to not hash when a key file is provided */
 520                         params.hash = "ripemd160";
 521
 522                 if (arg_cipher) {
 523                         size_t l;
 524
 525                         l = strcspn(arg_cipher, "-");
 526                         truncated_cipher = strndup(arg_cipher, l);
 527                         if (!truncated_cipher)
 528                                 return log_oom();
 529
 530                         cipher = truncated_cipher;
 531                         cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain";
 532                 } else {
 533                         cipher = "aes";
 534                         cipher_mode = "cbc-essiv:sha256";
 535                 }
 536
 537                 /* for CRYPT_PLAIN limit reads
 538                  * from keyfile to key length, and
 539                  * ignore keyfile-size */
 540                 arg_keyfile_size = arg_key_size;
 541
 542                 /* In contrast to what the name
 543                  * crypt_setup() might suggest this
 544                  * doesn't actually format anything,
 545                  * it just configures encryption
 546                  * parameters when used for plain
 547                  * mode. */
 548                 r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, &params);
 549
 550                 /* hash == NULL implies the user passed "plain" */
 551                 pass_volume_key = (params.hash == NULL);
 552         }
 553
 554         if (r < 0)
 555                 return log_error_errno(r, "Loading of cryptographic parameters failed: %m");
 556
 557         log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
 558                  crypt_get_cipher(cd),
 559                  crypt_get_cipher_mode(cd),
 560                  crypt_get_volume_key_size(cd)*8,
 561                  crypt_get_device_name(cd));
 562
 563         if (key_file) {
 564                 r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags);
 565                 if (r < 0) {
 566                         log_error_errno(r, "Failed to activate with key file '%s': %m", key_file);
 567                         return -EAGAIN;
 568                 }
 569         } else {
 570                 char **p;
 571
 572                 STRV_FOREACH(p, passwords) {
 573                         if (pass_volume_key)
 574                                 r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags);
 575                         else
 576                                 r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags);
 577
 578                         if (r >= 0)
 579                                 break;
 580                 }
 581         }
 582
 583         return r;
 584 }
 585
 586 static int help(void) {
 587
 588         printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
 589                "%s detach VOLUME\n\n"
 590                "Attaches or detaches an encrypted block device.\n",
 591                program_invocation_short_name,
 592                program_invocation_short_name);
 593
 594         return 0;
 595 }
 596
 597 int main(int argc, char *argv[]) {
 598         struct crypt_device *cd = NULL;
 599         int r = -EINVAL;
 600
 601         if (argc <= 1) {
 602                 r = help();
 603                 goto finish;
 604         }
 605
 606         if (argc < 3) {
 607                 log_error("This program requires at least two arguments.");
 608                 goto finish;
 609         }
 610
 611         log_set_target(LOG_TARGET_AUTO);
 612         log_parse_environment();
 613         log_open();
 614
 615         umask(0022);
 616
 617         if (streq(argv[1], "attach")) {
 618                 uint32_t flags = 0;
 619                 unsigned tries;
 620                 usec_t until;
 621                 crypt_status_info status;
 622                 const char *key_file = NULL;
 623
 624                 /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */
 625
 626                 if (argc < 4) {
 627                         log_error("attach requires at least two arguments.");
 628                         goto finish;
 629                 }
 630
 631                 if (argc >= 5 &&
 632                     argv[4][0] &&
 633                     !streq(argv[4], "-") &&
 634                     !streq(argv[4], "none")) {
 635
 636                         if (!path_is_absolute(argv[4]))
 637                                 log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]);
 638                         else
 639                                 key_file = argv[4];
 640                 }
 641
 642                 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
 643                         if (parse_options(argv[5]) < 0)
 644                                 goto finish;
 645                 }
 646
 647                 /* A delicious drop of snake oil */
 648                 mlockall(MCL_FUTURE);
 649
 650                 if (arg_header) {
 651                         log_debug("LUKS header: %s", arg_header);
 652                         r = crypt_init(&cd, arg_header);
 653                 } else
 654                         r = crypt_init(&cd, argv[3]);
 655                 if (r < 0) {
 656                         log_error_errno(r, "crypt_init() failed: %m");
 657                         goto finish;
 658                 }
 659
 660                 crypt_set_log_callback(cd, log_glue, NULL);
 661
 662                 status = crypt_status(cd, argv[2]);
 663                 if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
 664                         log_info("Volume %s already active.", argv[2]);
 665                         r = 0;
 666                         goto finish;
 667                 }
 668
 669                 if (arg_readonly)
 670                         flags |= CRYPT_ACTIVATE_READONLY;
 671
 672                 if (arg_discards)
 673                         flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
 674
 675                 if (arg_timeout == USEC_INFINITY)
 676                         until = 0;
 677                 else
 678                         until = now(CLOCK_MONOTONIC) + arg_timeout;
 679
 680                 arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8));
 681
 682                 if (key_file) {
 683                         struct stat st;
 684
 685                         /* Ideally we'd do this on the open fd, but since this is just a
 686                          * warning it's OK to do this in two steps. */
 687                         if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005))
 688                                 log_warning("Key file %s is world-readable. This is not a good idea!", key_file);
 689                 }
 690
 691                 for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
 692                         _cleanup_strv_free_erase_ char **passwords = NULL;
 693
 694                         if (!key_file) {
 695                                 r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords);
 696                                 if (r == -EAGAIN)
 697                                         continue;
 698                                 if (r < 0)
 699                                         goto finish;
 700                         }
 701
 702                         if (streq_ptr(arg_type, CRYPT_TCRYPT))
 703                                 r = attach_tcrypt(cd, argv[2], key_file, passwords, flags);
 704                         else
 705                                 r = attach_luks_or_plain(cd,
 706                                                          argv[2],
 707                                                          key_file,
 708                                                          arg_header ? argv[3] : NULL,
 709                                                          passwords,
 710                                                          flags);
 711                         if (r >= 0)
 712                                 break;
 713                         if (r == -EAGAIN) {
 714                                 key_file = NULL;
 715                                 continue;
 716                         }
 717                         if (r != -EPERM) {
 718                                 log_error_errno(r, "Failed to activate: %m");
 719                                 goto finish;
 720                         }
 721
 722                         log_warning("Invalid passphrase.");
 723                 }
 724
 725                 if (arg_tries != 0 && tries >= arg_tries) {
 726                         log_error("Too many attempts; giving up.");
 727                         r = -EPERM;
 728                         goto finish;
 729                 }
 730
 731         } else if (streq(argv[1], "detach")) {
 732
 733                 r = crypt_init_by_name(&cd, argv[2]);
 734                 if (r == -ENODEV) {
 735                         log_info("Volume %s already inactive.", argv[2]);
 736                         r = 0;
 737                         goto finish;
 738                 }
 739                 if (r < 0) {
 740                         log_error_errno(r, "crypt_init_by_name() failed: %m");
 741                         goto finish;
 742                 }
 743
 744                 crypt_set_log_callback(cd, log_glue, NULL);
 745
 746                 r = crypt_deactivate(cd, argv[2]);
 747                 if (r < 0) {
 748                         log_error_errno(r, "Failed to deactivate: %m");
 749                         goto finish;
 750                 }
 751
 752         } else {
 753                 log_error("Unknown verb %s.", argv[1]);
 754                 goto finish;
 755         }
 756
 757         r = 0;
 758
 759 finish:
 760         if (cd)
 761                 crypt_free(cd);
 762
 763         free(arg_cipher);
 764         free(arg_hash);
 765         free(arg_header);
 766         strv_free(arg_tcrypt_keyfiles);
 767
 768         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 769 }