src/cryptsetup/cryptsetup.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <mntent.h>
   5 #include <string.h>
   6 #include <sys/mman.h>
   7
   8 #include "sd-device.h"
   9
  10 #include "alloc-util.h"
  11 #include "ask-password-api.h"
  12 #include "crypt-util.h"
  13 #include "device-util.h"
  14 #include "escape.h"
  15 #include "fileio.h"
  16 #include "log.h"
  17 #include "mount-util.h"
  18 #include "parse-util.h"
  19 #include "path-util.h"
  20 #include "string-util.h"
  21 #include "strv.h"
  22 #include "terminal-util.h"
  23 #include "util.h"
  24
  25 /* internal helper */
  26 #define ANY_LUKS "LUKS"
  27
  28 static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */
  29 static char *arg_cipher = NULL;
  30 static unsigned arg_key_size = 0;
  31 static int arg_key_slot = CRYPT_ANY_SLOT;
  32 static unsigned arg_keyfile_size = 0;
  33 static uint64_t arg_keyfile_offset = 0;
  34 static char *arg_hash = NULL;
  35 static char *arg_header = NULL;
  36 static unsigned arg_tries = 3;
  37 static bool arg_readonly = false;
  38 static bool arg_verify = false;
  39 static bool arg_discards = false;
  40 static bool arg_tcrypt_hidden = false;
  41 static bool arg_tcrypt_system = false;
  42 #ifdef CRYPT_TCRYPT_VERA_MODES
  43 static bool arg_tcrypt_veracrypt = false;
  44 #endif
  45 static char **arg_tcrypt_keyfiles = NULL;
  46 static uint64_t arg_offset = 0;
  47 static uint64_t arg_skip = 0;
  48 static usec_t arg_timeout = USEC_INFINITY;
  49
  50 /* Options Debian's crypttab knows we don't:
  51
  52     precheck=
  53     check=
  54     checkargs=
  55     noearly=
  56     loud=
  57     keyscript=
  58 */
  59
  60 static int parse_one_option(const char *option) {
  61         const char *val;
  62         int r;
  63
  64         assert(option);
  65
  66         /* Handled outside of this tool */
  67         if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev"))
  68                 return 0;
  69
  70         if ((val = startswith(option, "cipher="))) {
  71                 r = free_and_strdup(&arg_cipher, val);
  72                 if (r < 0)
  73                         return log_oom();
  74
  75         } else if ((val = startswith(option, "size="))) {
  76
  77                 r = safe_atou(val, &arg_key_size);
  78                 if (r < 0) {
  79                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
  80                         return 0;
  81                 }
  82
  83                 if (arg_key_size % 8) {
  84                         log_error("size= not a multiple of 8, ignoring.");
  85                         return 0;
  86                 }
  87
  88                 arg_key_size /= 8;
  89
  90         } else if ((val = startswith(option, "key-slot="))) {
  91
  92                 arg_type = ANY_LUKS;
  93                 r = safe_atoi(val, &arg_key_slot);
  94                 if (r < 0) {
  95                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
  96                         return 0;
  97                 }
  98
  99         } else if ((val = startswith(option, "tcrypt-keyfile="))) {
 100
 101                 arg_type = CRYPT_TCRYPT;
 102                 if (path_is_absolute(val)) {
 103                         if (strv_extend(&arg_tcrypt_keyfiles, val) < 0)
 104                                 return log_oom();
 105                 } else
 106                         log_error("Key file path \"%s\" is not absolute. Ignoring.", val);
 107
 108         } else if ((val = startswith(option, "keyfile-size="))) {
 109
 110                 r = safe_atou(val, &arg_keyfile_size);
 111                 if (r < 0) {
 112                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 113                         return 0;
 114                 }
 115
 116         } else if ((val = startswith(option, "keyfile-offset="))) {
 117                 uint64_t off;
 118
 119                 r = safe_atou64(val, &off);
 120                 if (r < 0) {
 121                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 122                         return 0;
 123                 }
 124
 125                 if ((size_t) off != off) {
 126                         /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */
 127                         log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off);
 128                         return 0;
 129                 }
 130
 131                 arg_keyfile_offset = off;
 132
 133         } else if ((val = startswith(option, "hash="))) {
 134                 r = free_and_strdup(&arg_hash, val);
 135                 if (r < 0)
 136                         return log_oom();
 137
 138         } else if ((val = startswith(option, "header="))) {
 139                 arg_type = ANY_LUKS;
 140
 141                 if (!path_is_absolute(val)) {
 142                         log_error("Header path \"%s\" is not absolute, refusing.", val);
 143                         return -EINVAL;
 144                 }
 145
 146                 if (arg_header) {
 147                         log_error("Duplicate header= option, refusing.");
 148                         return -EINVAL;
 149                 }
 150
 151                 arg_header = strdup(val);
 152                 if (!arg_header)
 153                         return log_oom();
 154
 155         } else if ((val = startswith(option, "tries="))) {
 156
 157                 r = safe_atou(val, &arg_tries);
 158                 if (r < 0) {
 159                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 160                         return 0;
 161                 }
 162
 163         } else if (STR_IN_SET(option, "readonly", "read-only"))
 164                 arg_readonly = true;
 165         else if (streq(option, "verify"))
 166                 arg_verify = true;
 167         else if (STR_IN_SET(option, "allow-discards", "discard"))
 168                 arg_discards = true;
 169         else if (streq(option, "luks"))
 170                 arg_type = ANY_LUKS;
 171         else if (streq(option, "tcrypt"))
 172                 arg_type = CRYPT_TCRYPT;
 173         else if (streq(option, "tcrypt-hidden")) {
 174                 arg_type = CRYPT_TCRYPT;
 175                 arg_tcrypt_hidden = true;
 176         } else if (streq(option, "tcrypt-system")) {
 177                 arg_type = CRYPT_TCRYPT;
 178                 arg_tcrypt_system = true;
 179         } else if (streq(option, "tcrypt-veracrypt")) {
 180 #ifdef CRYPT_TCRYPT_VERA_MODES
 181                 arg_type = CRYPT_TCRYPT;
 182                 arg_tcrypt_veracrypt = true;
 183 #else
 184                 log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing.");
 185                 return -EINVAL;
 186 #endif
 187         } else if (STR_IN_SET(option, "plain", "swap", "tmp"))
 188                 arg_type = CRYPT_PLAIN;
 189         else if ((val = startswith(option, "timeout="))) {
 190
 191                 r = parse_sec_fix_0(val, &arg_timeout);
 192                 if (r < 0) {
 193                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 194                         return 0;
 195                 }
 196
 197         } else if ((val = startswith(option, "offset="))) {
 198
 199                 r = safe_atou64(val, &arg_offset);
 200                 if (r < 0)
 201                         return log_error_errno(r, "Failed to parse %s: %m", option);
 202
 203         } else if ((val = startswith(option, "skip="))) {
 204
 205                 r = safe_atou64(val, &arg_skip);
 206                 if (r < 0)
 207                         return log_error_errno(r, "Failed to parse %s: %m", option);
 208
 209         } else if (!streq(option, "none"))
 210                 log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
 211
 212         return 0;
 213 }
 214
 215 static int parse_options(const char *options) {
 216         const char *word, *state;
 217         size_t l;
 218         int r;
 219
 220         assert(options);
 221
 222         FOREACH_WORD_SEPARATOR(word, l, options, ",", state) {
 223                 _cleanup_free_ char *o;
 224
 225                 o = strndup(word, l);
 226                 if (!o)
 227                         return -ENOMEM;
 228                 r = parse_one_option(o);
 229                 if (r < 0)
 230                         return r;
 231         }
 232
 233         /* sanity-check options */
 234         if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) {
 235                 if (arg_offset)
 236                       log_warning("offset= ignored with type %s", arg_type);
 237                 if (arg_skip)
 238                       log_warning("skip= ignored with type %s", arg_type);
 239         }
 240
 241         return 0;
 242 }
 243
 244 static char* disk_description(const char *path) {
 245
 246         static const char name_fields[] =
 247                 "ID_PART_ENTRY_NAME\0"
 248                 "DM_NAME\0"
 249                 "ID_MODEL_FROM_DATABASE\0"
 250                 "ID_MODEL\0";
 251
 252         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 253         struct stat st;
 254         const char *i;
 255         int r;
 256
 257         assert(path);
 258
 259         if (stat(path, &st) < 0)
 260                 return NULL;
 261
 262         if (!S_ISBLK(st.st_mode))
 263                 return NULL;
 264
 265         r = sd_device_new_from_devnum(&device, 'b', st.st_rdev);
 266         if (r < 0)
 267                 return NULL;
 268
 269         NULSTR_FOREACH(i, name_fields) {
 270                 const char *name;
 271
 272                 r = sd_device_get_property_value(device, i, &name);
 273                 if (r >= 0 && !isempty(name))
 274                         return strdup(name);
 275         }
 276
 277         return NULL;
 278 }
 279
 280 static char *disk_mount_point(const char *label) {
 281         _cleanup_free_ char *device = NULL;
 282         _cleanup_endmntent_ FILE *f = NULL;
 283         struct mntent *m;
 284
 285         /* Yeah, we don't support native systemd unit files here for now */
 286
 287         if (asprintf(&device, "/dev/mapper/%s", label) < 0)
 288                 return NULL;
 289
 290         f = setmntent("/etc/fstab", "re");
 291         if (!f)
 292                 return NULL;
 293
 294         while ((m = getmntent(f)))
 295                 if (path_equal(m->mnt_fsname, device))
 296                         return strdup(m->mnt_dir);
 297
 298         return NULL;
 299 }
 300
 301 static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) {
 302         _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *text = NULL, *disk_path = NULL;
 303         _cleanup_strv_free_erase_ char **passwords = NULL;
 304         const char *name = NULL;
 305         char **p, *id;
 306         int r = 0;
 307
 308         assert(vol);
 309         assert(src);
 310         assert(ret);
 311
 312         description = disk_description(src);
 313         mount_point = disk_mount_point(vol);
 314
 315         disk_path = cescape(src);
 316         if (!disk_path)
 317                 return log_oom();
 318
 319         if (description && streq(vol, description))
 320                 /* If the description string is simply the
 321                  * volume name, then let's not show this
 322                  * twice */
 323                 description = mfree(description);
 324
 325         if (mount_point && description)
 326                 r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point);
 327         else if (mount_point)
 328                 r = asprintf(&name_buffer, "%s on %s", vol, mount_point);
 329         else if (description)
 330                 r = asprintf(&name_buffer, "%s (%s)", description, vol);
 331
 332         if (r < 0)
 333                 return log_oom();
 334
 335         name = name_buffer ? name_buffer : vol;
 336
 337         if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
 338                 return log_oom();
 339
 340         id = strjoina("cryptsetup:", disk_path);
 341
 342         r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until,
 343                               ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED),
 344                               &passwords);
 345         if (r < 0)
 346                 return log_error_errno(r, "Failed to query password: %m");
 347
 348         if (arg_verify) {
 349                 _cleanup_strv_free_erase_ char **passwords2 = NULL;
 350
 351                 assert(strv_length(passwords) == 1);
 352
 353                 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
 354                         return log_oom();
 355
 356                 id = strjoina("cryptsetup-verification:", disk_path);
 357
 358                 r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2);
 359                 if (r < 0)
 360                         return log_error_errno(r, "Failed to query verification password: %m");
 361
 362                 assert(strv_length(passwords2) == 1);
 363
 364                 if (!streq(passwords[0], passwords2[0])) {
 365                         log_warning("Passwords did not match, retrying.");
 366                         return -EAGAIN;
 367                 }
 368         }
 369
 370         strv_uniq(passwords);
 371
 372         STRV_FOREACH(p, passwords) {
 373                 char *c;
 374
 375                 if (strlen(*p)+1 >= arg_key_size)
 376                         continue;
 377
 378                 /* Pad password if necessary */
 379                 c = new(char, arg_key_size);
 380                 if (!c)
 381                         return log_oom();
 382
 383                 strncpy(c, *p, arg_key_size);
 384                 free(*p);
 385                 *p = c;
 386         }
 387
 388         *ret = TAKE_PTR(passwords);
 389
 390         return 0;
 391 }
 392
 393 static int attach_tcrypt(
 394                 struct crypt_device *cd,
 395                 const char *name,
 396                 const char *key_file,
 397                 char **passwords,
 398                 uint32_t flags) {
 399
 400         int r = 0;
 401         _cleanup_free_ char *passphrase = NULL;
 402         struct crypt_params_tcrypt params = {
 403                 .flags = CRYPT_TCRYPT_LEGACY_MODES,
 404                 .keyfiles = (const char **)arg_tcrypt_keyfiles,
 405                 .keyfiles_count = strv_length(arg_tcrypt_keyfiles)
 406         };
 407
 408         assert(cd);
 409         assert(name);
 410         assert(key_file || (passwords && passwords[0]));
 411
 412         if (arg_tcrypt_hidden)
 413                 params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER;
 414
 415         if (arg_tcrypt_system)
 416                 params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER;
 417
 418 #ifdef CRYPT_TCRYPT_VERA_MODES
 419         if (arg_tcrypt_veracrypt)
 420                 params.flags |= CRYPT_TCRYPT_VERA_MODES;
 421 #endif
 422
 423         if (key_file) {
 424                 r = read_one_line_file(key_file, &passphrase);
 425                 if (r < 0) {
 426                         log_error_errno(r, "Failed to read password file '%s': %m", key_file);
 427                         return -EAGAIN;
 428                 }
 429
 430                 params.passphrase = passphrase;
 431         } else
 432                 params.passphrase = passwords[0];
 433         params.passphrase_size = strlen(params.passphrase);
 434
 435         r = crypt_load(cd, CRYPT_TCRYPT, &params);
 436         if (r < 0) {
 437                 if (key_file && r == -EPERM) {
 438                         log_error("Failed to activate using password file '%s'.", key_file);
 439                         return -EAGAIN;
 440                 }
 441                 return r;
 442         }
 443
 444         return crypt_activate_by_volume_key(cd, name, NULL, 0, flags);
 445 }
 446
 447 static int attach_luks_or_plain(struct crypt_device *cd,
 448                                 const char *name,
 449                                 const char *key_file,
 450                                 const char *data_device,
 451                                 char **passwords,
 452                                 uint32_t flags) {
 453         int r = 0;
 454         bool pass_volume_key = false;
 455
 456         assert(cd);
 457         assert(name);
 458         assert(key_file || passwords);
 459
 460         if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) {
 461                 r = crypt_load(cd, CRYPT_LUKS, NULL);
 462                 if (r < 0) {
 463                         log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd));
 464                         return r;
 465                 }
 466
 467                 if (data_device)
 468                         r = crypt_set_data_device(cd, data_device);
 469         }
 470
 471         if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) {
 472                 struct crypt_params_plain params = {
 473                         .offset = arg_offset,
 474                         .skip = arg_skip,
 475                 };
 476                 const char *cipher, *cipher_mode;
 477                 _cleanup_free_ char *truncated_cipher = NULL;
 478
 479                 if (arg_hash) {
 480                         /* plain isn't a real hash type. it just means "use no hash" */
 481                         if (!streq(arg_hash, "plain"))
 482                                 params.hash = arg_hash;
 483                 } else if (!key_file)
 484                         /* for CRYPT_PLAIN, the behaviour of cryptsetup
 485                          * package is to not hash when a key file is provided */
 486                         params.hash = "ripemd160";
 487
 488                 if (arg_cipher) {
 489                         size_t l;
 490
 491                         l = strcspn(arg_cipher, "-");
 492                         truncated_cipher = strndup(arg_cipher, l);
 493                         if (!truncated_cipher)
 494                                 return log_oom();
 495
 496                         cipher = truncated_cipher;
 497                         cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain";
 498                 } else {
 499                         cipher = "aes";
 500                         cipher_mode = "cbc-essiv:sha256";
 501                 }
 502
 503                 /* for CRYPT_PLAIN limit reads
 504                  * from keyfile to key length, and
 505                  * ignore keyfile-size */
 506                 arg_keyfile_size = arg_key_size;
 507
 508                 /* In contrast to what the name
 509                  * crypt_setup() might suggest this
 510                  * doesn't actually format anything,
 511                  * it just configures encryption
 512                  * parameters when used for plain
 513                  * mode. */
 514                 r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, &params);
 515
 516                 /* hash == NULL implies the user passed "plain" */
 517                 pass_volume_key = (params.hash == NULL);
 518         }
 519
 520         if (r < 0)
 521                 return log_error_errno(r, "Loading of cryptographic parameters failed: %m");
 522
 523         log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
 524                  crypt_get_cipher(cd),
 525                  crypt_get_cipher_mode(cd),
 526                  crypt_get_volume_key_size(cd)*8,
 527                  crypt_get_device_name(cd));
 528
 529         if (key_file) {
 530                 r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags);
 531                 if (r < 0) {
 532                         log_error_errno(r, "Failed to activate with key file '%s': %m", key_file);
 533                         return -EAGAIN;
 534                 }
 535         } else {
 536                 char **p;
 537
 538                 STRV_FOREACH(p, passwords) {
 539                         if (pass_volume_key)
 540                                 r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags);
 541                         else
 542                                 r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags);
 543
 544                         if (r >= 0)
 545                                 break;
 546                 }
 547         }
 548
 549         return r;
 550 }
 551
 552 static int help(void) {
 553         _cleanup_free_ char *link = NULL;
 554         int r;
 555
 556         r = terminal_urlify_man("systemd-cryptsetup@.service", "8", &link);
 557         if (r < 0)
 558                 return log_oom();
 559
 560         printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
 561                "%s detach VOLUME\n\n"
 562                "Attaches or detaches an encrypted block device.\n"
 563                "\nSee the %s for details.\n"
 564                , program_invocation_short_name
 565                , program_invocation_short_name
 566                , link
 567         );
 568
 569         return 0;
 570 }
 571
 572 int main(int argc, char *argv[]) {
 573         _cleanup_(crypt_freep) struct crypt_device *cd = NULL;
 574         int r = -EINVAL;
 575
 576         if (argc <= 1) {
 577                 r = help();
 578                 goto finish;
 579         }
 580
 581         if (argc < 3) {
 582                 log_error("This program requires at least two arguments.");
 583                 goto finish;
 584         }
 585
 586         log_set_target(LOG_TARGET_AUTO);
 587         log_parse_environment();
 588         log_open();
 589
 590         umask(0022);
 591
 592         if (streq(argv[1], "attach")) {
 593                 uint32_t flags = 0;
 594                 unsigned tries;
 595                 usec_t until;
 596                 crypt_status_info status;
 597                 const char *key_file = NULL;
 598
 599                 /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */
 600
 601                 if (argc < 4) {
 602                         log_error("attach requires at least two arguments.");
 603                         goto finish;
 604                 }
 605
 606                 if (argc >= 5 &&
 607                     argv[4][0] &&
 608                     !streq(argv[4], "-") &&
 609                     !streq(argv[4], "none")) {
 610
 611                         if (!path_is_absolute(argv[4]))
 612                                 log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]);
 613                         else
 614                                 key_file = argv[4];
 615                 }
 616
 617                 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
 618                         if (parse_options(argv[5]) < 0)
 619                                 goto finish;
 620                 }
 621
 622                 /* A delicious drop of snake oil */
 623                 mlockall(MCL_FUTURE);
 624
 625                 if (arg_header) {
 626                         log_debug("LUKS header: %s", arg_header);
 627                         r = crypt_init(&cd, arg_header);
 628                 } else
 629                         r = crypt_init(&cd, argv[3]);
 630                 if (r < 0) {
 631                         log_error_errno(r, "crypt_init() failed: %m");
 632                         goto finish;
 633                 }
 634
 635                 crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
 636
 637                 status = crypt_status(cd, argv[2]);
 638                 if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
 639                         log_info("Volume %s already active.", argv[2]);
 640                         r = 0;
 641                         goto finish;
 642                 }
 643
 644                 if (arg_readonly)
 645                         flags |= CRYPT_ACTIVATE_READONLY;
 646
 647                 if (arg_discards)
 648                         flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
 649
 650                 if (arg_timeout == USEC_INFINITY)
 651                         until = 0;
 652                 else
 653                         until = now(CLOCK_MONOTONIC) + arg_timeout;
 654
 655                 arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8));
 656
 657                 if (key_file) {
 658                         struct stat st;
 659
 660                         /* Ideally we'd do this on the open fd, but since this is just a
 661                          * warning it's OK to do this in two steps. */
 662                         if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005))
 663                                 log_warning("Key file %s is world-readable. This is not a good idea!", key_file);
 664                 }
 665
 666                 for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
 667                         _cleanup_strv_free_erase_ char **passwords = NULL;
 668
 669                         if (!key_file) {
 670                                 r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords);
 671                                 if (r == -EAGAIN)
 672                                         continue;
 673                                 if (r < 0)
 674                                         goto finish;
 675                         }
 676
 677                         if (streq_ptr(arg_type, CRYPT_TCRYPT))
 678                                 r = attach_tcrypt(cd, argv[2], key_file, passwords, flags);
 679                         else
 680                                 r = attach_luks_or_plain(cd,
 681                                                          argv[2],
 682                                                          key_file,
 683                                                          arg_header ? argv[3] : NULL,
 684                                                          passwords,
 685                                                          flags);
 686                         if (r >= 0)
 687                                 break;
 688                         if (r == -EAGAIN) {
 689                                 key_file = NULL;
 690                                 continue;
 691                         }
 692                         if (r != -EPERM) {
 693                                 log_error_errno(r, "Failed to activate: %m");
 694                                 goto finish;
 695                         }
 696
 697                         log_warning("Invalid passphrase.");
 698                 }
 699
 700                 if (arg_tries != 0 && tries >= arg_tries) {
 701                         log_error("Too many attempts; giving up.");
 702                         r = -EPERM;
 703                         goto finish;
 704                 }
 705
 706         } else if (streq(argv[1], "detach")) {
 707
 708                 r = crypt_init_by_name(&cd, argv[2]);
 709                 if (r == -ENODEV) {
 710                         log_info("Volume %s already inactive.", argv[2]);
 711                         r = 0;
 712                         goto finish;
 713                 }
 714                 if (r < 0) {
 715                         log_error_errno(r, "crypt_init_by_name() failed: %m");
 716                         goto finish;
 717                 }
 718
 719                 crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
 720
 721                 r = crypt_deactivate(cd, argv[2]);
 722                 if (r < 0) {
 723                         log_error_errno(r, "Failed to deactivate: %m");
 724                         goto finish;
 725                 }
 726
 727         } else {
 728                 log_error("Unknown verb %s.", argv[1]);
 729                 goto finish;
 730         }
 731
 732         r = 0;
 733
 734 finish:
 735         free(arg_cipher);
 736         free(arg_hash);
 737         free(arg_header);
 738         strv_free(arg_tcrypt_keyfiles);
 739
 740         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 741 }