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