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 static bool arg_tcrypt_veracrypt = false;
  56 static char **arg_tcrypt_keyfiles = NULL;
  57 static uint64_t arg_offset = 0;
  58 static uint64_t arg_skip = 0;
  59 static usec_t arg_timeout = 0;
  60
  61 /* Options Debian's crypttab knows we don't:
  62
  63     precheck=
  64     check=
  65     checkargs=
  66     noearly=
  67     loud=
  68     keyscript=
  69 */
  70
  71 static int parse_one_option(const char *option) {
  72         assert(option);
  73
  74         /* Handled outside of this tool */
  75         if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail"))
  76                 return 0;
  77
  78         if (startswith(option, "cipher=")) {
  79                 char *t;
  80
  81                 t = strdup(option+7);
  82                 if (!t)
  83                         return log_oom();
  84
  85                 free(arg_cipher);
  86                 arg_cipher = t;
  87
  88         } else if (startswith(option, "size=")) {
  89
  90                 if (safe_atou(option+5, &arg_key_size) < 0) {
  91                         log_error("size= parse failure, ignoring.");
  92                         return 0;
  93                 }
  94
  95                 if (arg_key_size % 8) {
  96                         log_error("size= not a multiple of 8, ignoring.");
  97                         return 0;
  98                 }
  99
 100                 arg_key_size /= 8;
 101
 102         } else if (startswith(option, "key-slot=")) {
 103
 104                 arg_type = CRYPT_LUKS1;
 105                 if (safe_atoi(option+9, &arg_key_slot) < 0) {
 106                         log_error("key-slot= parse failure, ignoring.");
 107                         return 0;
 108                 }
 109
 110         } else if (startswith(option, "tcrypt-keyfile=")) {
 111
 112                 arg_type = CRYPT_TCRYPT;
 113                 if (path_is_absolute(option+15)) {
 114                         if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0)
 115                                 return log_oom();
 116                 } else
 117                         log_error("Key file path '%s' is not absolute. Ignoring.", option+15);
 118
 119         } else if (startswith(option, "keyfile-size=")) {
 120
 121                 if (safe_atou(option+13, &arg_keyfile_size) < 0) {
 122                         log_error("keyfile-size= parse failure, ignoring.");
 123                         return 0;
 124                 }
 125
 126         } else if (startswith(option, "keyfile-offset=")) {
 127
 128                 if (safe_atou(option+15, &arg_keyfile_offset) < 0) {
 129                         log_error("keyfile-offset= parse failure, ignoring.");
 130                         return 0;
 131                 }
 132
 133         } else if (startswith(option, "hash=")) {
 134                 char *t;
 135
 136                 t = strdup(option+5);
 137                 if (!t)
 138                         return log_oom();
 139
 140                 free(arg_hash);
 141                 arg_hash = t;
 142
 143         } else if (startswith(option, "header=")) {
 144                 arg_type = CRYPT_LUKS1;
 145
 146                 if (!path_is_absolute(option+7)) {
 147                         log_error("Header path '%s' is not absolute, refusing.", option+7);
 148                         return -EINVAL;
 149                 }
 150
 151                 if (arg_header) {
 152                         log_error("Duplicate header= options, refusing.");
 153                         return -EINVAL;
 154                 }
 155
 156                 arg_header = strdup(option+7);
 157                 if (!arg_header)
 158                         return log_oom();
 159
 160         } else if (startswith(option, "tries=")) {
 161
 162                 if (safe_atou(option+6, &arg_tries) < 0) {
 163                         log_error("tries= parse failure, ignoring.");
 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 (startswith(option, "timeout=")) {
 194
 195                 if (parse_sec(option+8, &arg_timeout) < 0) {
 196                         log_error("timeout= parse failure, ignoring.");
 197                         return 0;
 198                 }
 199
 200         } else if (startswith(option, "offset=")) {
 201
 202                 if (safe_atou64(option+7, &arg_offset) < 0) {
 203                         log_error("offset= parse failure, refusing.");
 204                         return -EINVAL;
 205                 }
 206
 207         } else if (startswith(option, "skip=")) {
 208
 209                 if (safe_atou64(option+5, &arg_skip) < 0) {
 210                         log_error("skip= parse failure, refusing.");
 211                         return -EINVAL;
 212                 }
 213
 214         } else if (!streq(option, "none"))
 215                 log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
 216
 217         return 0;
 218 }
 219
 220 static int parse_options(const char *options) {
 221         const char *word, *state;
 222         size_t l;
 223         int r;
 224
 225         assert(options);
 226
 227         FOREACH_WORD_SEPARATOR(word, l, options, ",", state) {
 228                 _cleanup_free_ char *o;
 229
 230                 o = strndup(word, l);
 231                 if (!o)
 232                         return -ENOMEM;
 233                 r = parse_one_option(o);
 234                 if (r < 0)
 235                         return r;
 236         }
 237
 238         /* sanity-check options */
 239         if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) {
 240                 if (arg_offset)
 241                       log_warning("offset= ignored with type %s", arg_type);
 242                 if (arg_skip)
 243                       log_warning("skip= ignored with type %s", arg_type);
 244         }
 245
 246         return 0;
 247 }
 248
 249 static void log_glue(int level, const char *msg, void *usrptr) {
 250         log_debug("%s", msg);
 251 }
 252
 253 static int disk_major_minor(const char *path, char **ret) {
 254         struct stat st;
 255
 256         assert(path);
 257
 258         if (stat(path, &st) < 0)
 259                 return -errno;
 260
 261         if (!S_ISBLK(st.st_mode))
 262                 return -EINVAL;
 263
 264         if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0)
 265                 return -errno;
 266
 267         return 0;
 268 }
 269
 270 static char* disk_description(const char *path) {
 271
 272         static const char name_fields[] =
 273                 "ID_PART_ENTRY_NAME\0"
 274                 "DM_NAME\0"
 275                 "ID_MODEL_FROM_DATABASE\0"
 276                 "ID_MODEL\0";
 277
 278         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 279         struct stat st;
 280         const char *i;
 281         int r;
 282
 283         assert(path);
 284
 285         if (stat(path, &st) < 0)
 286                 return NULL;
 287
 288         if (!S_ISBLK(st.st_mode))
 289                 return NULL;
 290
 291         r = sd_device_new_from_devnum(&device, 'b', st.st_rdev);
 292         if (r < 0)
 293                 return NULL;
 294
 295         NULSTR_FOREACH(i, name_fields) {
 296                 const char *name;
 297
 298                 r = sd_device_get_property_value(device, i, &name);
 299                 if (r >= 0 && !isempty(name))
 300                         return strdup(name);
 301         }
 302
 303         return NULL;
 304 }
 305
 306 static char *disk_mount_point(const char *label) {
 307         _cleanup_free_ char *device = NULL;
 308         _cleanup_endmntent_ FILE *f = NULL;
 309         struct mntent *m;
 310
 311         /* Yeah, we don't support native systemd unit files here for now */
 312
 313         if (asprintf(&device, "/dev/mapper/%s", label) < 0)
 314                 return NULL;
 315
 316         f = setmntent("/etc/fstab", "r");
 317         if (!f)
 318                 return NULL;
 319
 320         while ((m = getmntent(f)))
 321                 if (path_equal(m->mnt_fsname, device))
 322                         return strdup(m->mnt_dir);
 323
 324         return NULL;
 325 }
 326
 327 static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) {
 328         _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL;
 329         _cleanup_strv_free_erase_ char **passwords = NULL;
 330         const char *name = NULL;
 331         char **p, *id;
 332         int r = 0;
 333
 334         assert(vol);
 335         assert(src);
 336         assert(ret);
 337
 338         description = disk_description(src);
 339         mount_point = disk_mount_point(vol);
 340
 341         if (description && streq(vol, description))
 342                 /* If the description string is simply the
 343                  * volume name, then let's not show this
 344                  * twice */
 345                 description = mfree(description);
 346
 347         if (mount_point && description)
 348                 r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point);
 349         else if (mount_point)
 350                 r = asprintf(&name_buffer, "%s on %s", vol, mount_point);
 351         else if (description)
 352                 r = asprintf(&name_buffer, "%s (%s)", description, vol);
 353
 354         if (r < 0)
 355                 return log_oom();
 356
 357         name = name_buffer ? name_buffer : vol;
 358
 359         if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
 360                 return log_oom();
 361
 362         if (src)
 363                 (void) disk_major_minor(src, &maj_min);
 364
 365         if (maj_min) {
 366                 escaped_name = maj_min;
 367                 maj_min = NULL;
 368         } else
 369                 escaped_name = cescape(name);
 370
 371         if (!escaped_name)
 372                 return log_oom();
 373
 374         id = strjoina("cryptsetup:", escaped_name);
 375
 376         r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until,
 377                               ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED),
 378                               &passwords);
 379         if (r < 0)
 380                 return log_error_errno(r, "Failed to query password: %m");
 381
 382         if (arg_verify) {
 383                 _cleanup_strv_free_erase_ char **passwords2 = NULL;
 384
 385                 assert(strv_length(passwords) == 1);
 386
 387                 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
 388                         return log_oom();
 389
 390                 id = strjoina("cryptsetup-verification:", escaped_name);
 391
 392                 r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2);
 393                 if (r < 0)
 394                         return log_error_errno(r, "Failed to query verification password: %m");
 395
 396                 assert(strv_length(passwords2) == 1);
 397
 398                 if (!streq(passwords[0], passwords2[0])) {
 399                         log_warning("Passwords did not match, retrying.");
 400                         return -EAGAIN;
 401                 }
 402         }
 403
 404         strv_uniq(passwords);
 405
 406         STRV_FOREACH(p, passwords) {
 407                 char *c;
 408
 409                 if (strlen(*p)+1 >= arg_key_size)
 410                         continue;
 411
 412                 /* Pad password if necessary */
 413                 c = new(char, arg_key_size);
 414                 if (!c)
 415                         return log_oom();
 416
 417                 strncpy(c, *p, arg_key_size);
 418                 free(*p);
 419                 *p = c;
 420         }
 421
 422         *ret = passwords;
 423         passwords = NULL;
 424
 425         return 0;
 426 }
 427
 428 static int attach_tcrypt(
 429                 struct crypt_device *cd,
 430                 const char *name,
 431                 const char *key_file,
 432                 char **passwords,
 433                 uint32_t flags) {
 434
 435         int r = 0;
 436         _cleanup_free_ char *passphrase = NULL;
 437         struct crypt_params_tcrypt params = {
 438                 .flags = CRYPT_TCRYPT_LEGACY_MODES,
 439                 .keyfiles = (const char **)arg_tcrypt_keyfiles,
 440                 .keyfiles_count = strv_length(arg_tcrypt_keyfiles)
 441         };
 442
 443         assert(cd);
 444         assert(name);
 445         assert(key_file || (passwords && passwords[0]));
 446
 447         if (arg_tcrypt_hidden)
 448                 params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER;
 449
 450         if (arg_tcrypt_system)
 451                 params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER;
 452
 453 #ifdef CRYPT_TCRYPT_VERA_MODES
 454         if (arg_tcrypt_veracrypt)
 455                 params.flags |= CRYPT_TCRYPT_VERA_MODES;
 456 #endif
 457
 458         if (key_file) {
 459                 r = read_one_line_file(key_file, &passphrase);
 460                 if (r < 0) {
 461                         log_error_errno(r, "Failed to read password file '%s': %m", key_file);
 462                         return -EAGAIN;
 463                 }
 464
 465                 params.passphrase = passphrase;
 466         } else
 467                 params.passphrase = passwords[0];
 468         params.passphrase_size = strlen(params.passphrase);
 469
 470         r = crypt_load(cd, CRYPT_TCRYPT, &params);
 471         if (r < 0) {
 472                 if (key_file && r == -EPERM) {
 473                         log_error("Failed to activate using password file '%s'.", key_file);
 474                         return -EAGAIN;
 475                 }
 476                 return r;
 477         }
 478
 479         return crypt_activate_by_volume_key(cd, name, NULL, 0, flags);
 480 }
 481
 482 static int attach_luks_or_plain(struct crypt_device *cd,
 483                                 const char *name,
 484                                 const char *key_file,
 485                                 const char *data_device,
 486                                 char **passwords,
 487                                 uint32_t flags) {
 488         int r = 0;
 489         bool pass_volume_key = false;
 490
 491         assert(cd);
 492         assert(name);
 493         assert(key_file || passwords);
 494
 495         if (!arg_type || streq(arg_type, CRYPT_LUKS1)) {
 496                 r = crypt_load(cd, CRYPT_LUKS1, NULL);
 497                 if (r < 0) {
 498                         log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd));
 499                         return r;
 500                 }
 501
 502                 if (data_device)
 503                         r = crypt_set_data_device(cd, data_device);
 504         }
 505
 506         if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) {
 507                 struct crypt_params_plain params = {
 508                         .offset = arg_offset,
 509                         .skip = arg_skip,
 510                 };
 511                 const char *cipher, *cipher_mode;
 512                 _cleanup_free_ char *truncated_cipher = NULL;
 513
 514                 if (arg_hash) {
 515                         /* plain isn't a real hash type. it just means "use no hash" */
 516                         if (!streq(arg_hash, "plain"))
 517                                 params.hash = arg_hash;
 518                 } else if (!key_file)
 519                         /* for CRYPT_PLAIN, the behaviour of cryptsetup
 520                          * package is to not hash when a key file is provided */
 521                         params.hash = "ripemd160";
 522
 523                 if (arg_cipher) {
 524                         size_t l;
 525
 526                         l = strcspn(arg_cipher, "-");
 527                         truncated_cipher = strndup(arg_cipher, l);
 528                         if (!truncated_cipher)
 529                                 return log_oom();
 530
 531                         cipher = truncated_cipher;
 532                         cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain";
 533                 } else {
 534                         cipher = "aes";
 535                         cipher_mode = "cbc-essiv:sha256";
 536                 }
 537
 538                 /* for CRYPT_PLAIN limit reads
 539                  * from keyfile to key length, and
 540                  * ignore keyfile-size */
 541                 arg_keyfile_size = arg_key_size;
 542
 543                 /* In contrast to what the name
 544                  * crypt_setup() might suggest this
 545                  * doesn't actually format anything,
 546                  * it just configures encryption
 547                  * parameters when used for plain
 548                  * mode. */
 549                 r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, &params);
 550
 551                 /* hash == NULL implies the user passed "plain" */
 552                 pass_volume_key = (params.hash == NULL);
 553         }
 554
 555         if (r < 0)
 556                 return log_error_errno(r, "Loading of cryptographic parameters failed: %m");
 557
 558         log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
 559                  crypt_get_cipher(cd),
 560                  crypt_get_cipher_mode(cd),
 561                  crypt_get_volume_key_size(cd)*8,
 562                  crypt_get_device_name(cd));
 563
 564         if (key_file) {
 565                 r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags);
 566                 if (r < 0) {
 567                         log_error_errno(r, "Failed to activate with key file '%s': %m", key_file);
 568                         return -EAGAIN;
 569                 }
 570         } else {
 571                 char **p;
 572
 573                 STRV_FOREACH(p, passwords) {
 574                         if (pass_volume_key)
 575                                 r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags);
 576                         else
 577                                 r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags);
 578
 579                         if (r >= 0)
 580                                 break;
 581                 }
 582         }
 583
 584         return r;
 585 }
 586
 587 static int help(void) {
 588
 589         printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
 590                "%s detach VOLUME\n\n"
 591                "Attaches or detaches an encrypted block device.\n",
 592                program_invocation_short_name,
 593                program_invocation_short_name);
 594
 595         return 0;
 596 }
 597
 598 int main(int argc, char *argv[]) {
 599         int r = EXIT_FAILURE;
 600         struct crypt_device *cd = NULL;
 601
 602         if (argc <= 1) {
 603                 help();
 604                 return EXIT_SUCCESS;
 605         }
 606
 607         if (argc < 3) {
 608                 log_error("This program requires at least two arguments.");
 609                 return EXIT_FAILURE;
 610         }
 611
 612         log_set_target(LOG_TARGET_AUTO);
 613         log_parse_environment();
 614         log_open();
 615
 616         umask(0022);
 617
 618         if (streq(argv[1], "attach")) {
 619                 uint32_t flags = 0;
 620                 int k;
 621                 unsigned tries;
 622                 usec_t until;
 623                 crypt_status_info status;
 624                 const char *key_file = NULL;
 625
 626                 /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */
 627
 628                 if (argc < 4) {
 629                         log_error("attach requires at least two arguments.");
 630                         goto finish;
 631                 }
 632
 633                 if (argc >= 5 &&
 634                     argv[4][0] &&
 635                     !streq(argv[4], "-") &&
 636                     !streq(argv[4], "none")) {
 637
 638                         if (!path_is_absolute(argv[4]))
 639                                 log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]);
 640                         else
 641                                 key_file = argv[4];
 642                 }
 643
 644                 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
 645                         if (parse_options(argv[5]) < 0)
 646                                 goto finish;
 647                 }
 648
 649                 /* A delicious drop of snake oil */
 650                 mlockall(MCL_FUTURE);
 651
 652                 if (arg_header) {
 653                         log_debug("LUKS header: %s", arg_header);
 654                         k = crypt_init(&cd, arg_header);
 655                 } else
 656                         k = crypt_init(&cd, argv[3]);
 657                 if (k) {
 658                         log_error_errno(k, "crypt_init() failed: %m");
 659                         goto finish;
 660                 }
 661
 662                 crypt_set_log_callback(cd, log_glue, NULL);
 663
 664                 status = crypt_status(cd, argv[2]);
 665                 if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) {
 666                         log_info("Volume %s already active.", argv[2]);
 667                         r = EXIT_SUCCESS;
 668                         goto finish;
 669                 }
 670
 671                 if (arg_readonly)
 672                         flags |= CRYPT_ACTIVATE_READONLY;
 673
 674                 if (arg_discards)
 675                         flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
 676
 677                 if (arg_timeout > 0)
 678                         until = now(CLOCK_MONOTONIC) + arg_timeout;
 679                 else
 680                         until = 0;
 681
 682                 arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8));
 683
 684                 if (key_file) {
 685                         struct stat st;
 686
 687                         /* Ideally we'd do this on the open fd, but since this is just a
 688                          * warning it's OK to do this in two steps. */
 689                         if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005))
 690                                 log_warning("Key file %s is world-readable. This is not a good idea!", key_file);
 691                 }
 692
 693                 for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
 694                         _cleanup_strv_free_erase_ char **passwords = NULL;
 695
 696                         if (!key_file) {
 697                                 k = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords);
 698                                 if (k == -EAGAIN)
 699                                         continue;
 700                                 else if (k < 0)
 701                                         goto finish;
 702                         }
 703
 704                         if (streq_ptr(arg_type, CRYPT_TCRYPT))
 705                                 k = attach_tcrypt(cd, argv[2], key_file, passwords, flags);
 706                         else
 707                                 k = attach_luks_or_plain(cd,
 708                                                          argv[2],
 709                                                          key_file,
 710                                                          arg_header ? argv[3] : NULL,
 711                                                          passwords,
 712                                                          flags);
 713                         if (k >= 0)
 714                                 break;
 715                         else if (k == -EAGAIN) {
 716                                 key_file = NULL;
 717                                 continue;
 718                         } else if (k != -EPERM) {
 719                                 log_error_errno(k, "Failed to activate: %m");
 720                                 goto finish;
 721                         }
 722
 723                         log_warning("Invalid passphrase.");
 724                 }
 725
 726                 if (arg_tries != 0 && tries >= arg_tries) {
 727                         log_error("Too many attempts; giving up.");
 728                         r = EXIT_FAILURE;
 729                         goto finish;
 730                 }
 731
 732         } else if (streq(argv[1], "detach")) {
 733                 int k;
 734
 735                 k = crypt_init_by_name(&cd, argv[2]);
 736                 if (k == -ENODEV) {
 737                         log_info("Volume %s already inactive.", argv[2]);
 738                         r = EXIT_SUCCESS;
 739                         goto finish;
 740                 } else if (k) {
 741                         log_error_errno(k, "crypt_init_by_name() failed: %m");
 742                         goto finish;
 743                 }
 744
 745                 crypt_set_log_callback(cd, log_glue, NULL);
 746
 747                 k = crypt_deactivate(cd, argv[2]);
 748                 if (k < 0) {
 749                         log_error_errno(k, "Failed to deactivate: %m");
 750                         goto finish;
 751                 }
 752
 753         } else {
 754                 log_error("Unknown verb %s.", argv[1]);
 755                 goto finish;
 756         }
 757
 758         r = EXIT_SUCCESS;
 759
 760 finish:
 761
 762         if (cd)
 763                 crypt_free(cd);
 764
 765         free(arg_cipher);
 766         free(arg_hash);
 767         free(arg_header);
 768         strv_free(arg_tcrypt_keyfiles);
 769
 770         return r;
 771 }