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 #include <sys/stat.h>
   8 #include <sys/types.h>
   9 #include <unistd.h>
  10
  11 #include "sd-device.h"
  12
  13 #include "alloc-util.h"
  14 #include "ask-password-api.h"
  15 #include "crypt-util.h"
  16 #include "device-util.h"
  17 #include "escape.h"
  18 #include "fileio.h"
  19 #include "log.h"
  20 #include "main-func.h"
  21 #include "mount-util.h"
  22 #include "nulstr-util.h"
  23 #include "parse-util.h"
  24 #include "path-util.h"
  25 #include "pretty-print.h"
  26 #include "string-util.h"
  27 #include "strv.h"
  28
  29 /* internal helper */
  30 #define ANY_LUKS "LUKS"
  31 /* as in src/cryptsetup.h */
  32 #define CRYPT_SECTOR_SIZE 512
  33 #define CRYPT_MAX_SECTOR_SIZE 4096
  34
  35 static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */
  36 static char *arg_cipher = NULL;
  37 static unsigned arg_key_size = 0;
  38 #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
  39 static unsigned arg_sector_size = CRYPT_SECTOR_SIZE;
  40 #endif
  41 static int arg_key_slot = CRYPT_ANY_SLOT;
  42 static unsigned arg_keyfile_size = 0;
  43 static uint64_t arg_keyfile_offset = 0;
  44 static char *arg_hash = NULL;
  45 static char *arg_header = NULL;
  46 static unsigned arg_tries = 3;
  47 static bool arg_readonly = false;
  48 static bool arg_verify = false;
  49 static bool arg_discards = false;
  50 static bool arg_same_cpu_crypt = false;
  51 static bool arg_submit_from_crypt_cpus = false;
  52 static bool arg_tcrypt_hidden = false;
  53 static bool arg_tcrypt_system = false;
  54 #ifdef CRYPT_TCRYPT_VERA_MODES
  55 static bool arg_tcrypt_veracrypt = false;
  56 #endif
  57 static char **arg_tcrypt_keyfiles = NULL;
  58 static uint64_t arg_offset = 0;
  59 static uint64_t arg_skip = 0;
  60 static usec_t arg_timeout = USEC_INFINITY;
  61
  62 STATIC_DESTRUCTOR_REGISTER(arg_cipher, freep);
  63 STATIC_DESTRUCTOR_REGISTER(arg_hash, freep);
  64 STATIC_DESTRUCTOR_REGISTER(arg_header, freep);
  65 STATIC_DESTRUCTOR_REGISTER(arg_tcrypt_keyfiles, strv_freep);
  66
  67 /* Options Debian's crypttab knows we don't:
  68
  69     precheck=
  70     check=
  71     checkargs=
  72     noearly=
  73     loud=
  74     keyscript=
  75 */
  76
  77 static int parse_one_option(const char *option) {
  78         const char *val;
  79         int r;
  80
  81         assert(option);
  82
  83         /* Handled outside of this tool */
  84         if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev"))
  85                 return 0;
  86
  87         if ((val = startswith(option, "cipher="))) {
  88                 r = free_and_strdup(&arg_cipher, val);
  89                 if (r < 0)
  90                         return log_oom();
  91
  92         } else if ((val = startswith(option, "size="))) {
  93
  94                 r = safe_atou(val, &arg_key_size);
  95                 if (r < 0) {
  96                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
  97                         return 0;
  98                 }
  99
 100                 if (arg_key_size % 8) {
 101                         log_error("size= not a multiple of 8, ignoring.");
 102                         return 0;
 103                 }
 104
 105                 arg_key_size /= 8;
 106
 107         } else if ((val = startswith(option, "sector-size="))) {
 108
 109 #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
 110                 r = safe_atou(val, &arg_sector_size);
 111                 if (r < 0) {
 112                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 113                         return 0;
 114                 }
 115
 116                 if (arg_sector_size % 2) {
 117                         log_error("sector-size= not a multiple of 2, ignoring.");
 118                         return 0;
 119                 }
 120
 121                 if (arg_sector_size < CRYPT_SECTOR_SIZE || arg_sector_size > CRYPT_MAX_SECTOR_SIZE) {
 122                         log_error("sector-size= is outside of %u and %u, ignoring.", CRYPT_SECTOR_SIZE, CRYPT_MAX_SECTOR_SIZE);
 123                         return 0;
 124                 }
 125 #else
 126                 log_error("sector-size= is not supported, compiled with old libcryptsetup.");
 127                 return 0;
 128 #endif
 129
 130         } else if ((val = startswith(option, "key-slot="))) {
 131
 132                 arg_type = ANY_LUKS;
 133                 r = safe_atoi(val, &arg_key_slot);
 134                 if (r < 0) {
 135                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 136                         return 0;
 137                 }
 138
 139         } else if ((val = startswith(option, "tcrypt-keyfile="))) {
 140
 141                 arg_type = CRYPT_TCRYPT;
 142                 if (path_is_absolute(val)) {
 143                         if (strv_extend(&arg_tcrypt_keyfiles, val) < 0)
 144                                 return log_oom();
 145                 } else
 146                         log_error("Key file path \"%s\" is not absolute. Ignoring.", val);
 147
 148         } else if ((val = startswith(option, "keyfile-size="))) {
 149
 150                 r = safe_atou(val, &arg_keyfile_size);
 151                 if (r < 0) {
 152                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 153                         return 0;
 154                 }
 155
 156         } else if ((val = startswith(option, "keyfile-offset="))) {
 157                 uint64_t off;
 158
 159                 r = safe_atou64(val, &off);
 160                 if (r < 0) {
 161                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 162                         return 0;
 163                 }
 164
 165                 if ((size_t) off != off) {
 166                         /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */
 167                         log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off);
 168                         return 0;
 169                 }
 170
 171                 arg_keyfile_offset = off;
 172
 173         } else if ((val = startswith(option, "hash="))) {
 174                 r = free_and_strdup(&arg_hash, val);
 175                 if (r < 0)
 176                         return log_oom();
 177
 178         } else if ((val = startswith(option, "header="))) {
 179                 arg_type = ANY_LUKS;
 180
 181                 if (!path_is_absolute(val))
 182                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 183                                                "Header path \"%s\" is not absolute, refusing.", val);
 184
 185                 if (arg_header)
 186                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 187                                                "Duplicate header= option, refusing.");
 188
 189                 arg_header = strdup(val);
 190                 if (!arg_header)
 191                         return log_oom();
 192
 193         } else if ((val = startswith(option, "tries="))) {
 194
 195                 r = safe_atou(val, &arg_tries);
 196                 if (r < 0) {
 197                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 198                         return 0;
 199                 }
 200
 201         } else if (STR_IN_SET(option, "readonly", "read-only"))
 202                 arg_readonly = true;
 203         else if (streq(option, "verify"))
 204                 arg_verify = true;
 205         else if (STR_IN_SET(option, "allow-discards", "discard"))
 206                 arg_discards = true;
 207         else if (streq(option, "same-cpu-crypt"))
 208                 arg_same_cpu_crypt = true;
 209         else if (streq(option, "submit-from-crypt-cpus"))
 210                 arg_submit_from_crypt_cpus = true;
 211         else if (streq(option, "luks"))
 212                 arg_type = ANY_LUKS;
 213         else if (streq(option, "tcrypt"))
 214                 arg_type = CRYPT_TCRYPT;
 215         else if (streq(option, "tcrypt-hidden")) {
 216                 arg_type = CRYPT_TCRYPT;
 217                 arg_tcrypt_hidden = true;
 218         } else if (streq(option, "tcrypt-system")) {
 219                 arg_type = CRYPT_TCRYPT;
 220                 arg_tcrypt_system = true;
 221         } else if (streq(option, "tcrypt-veracrypt")) {
 222 #ifdef CRYPT_TCRYPT_VERA_MODES
 223                 arg_type = CRYPT_TCRYPT;
 224                 arg_tcrypt_veracrypt = true;
 225 #else
 226                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 227                                        "This version of cryptsetup does not support tcrypt-veracrypt; refusing.");
 228 #endif
 229         } else if (STR_IN_SET(option, "plain", "swap", "tmp"))
 230                 arg_type = CRYPT_PLAIN;
 231         else if ((val = startswith(option, "timeout="))) {
 232
 233                 r = parse_sec_fix_0(val, &arg_timeout);
 234                 if (r < 0) {
 235                         log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
 236                         return 0;
 237                 }
 238
 239         } else if ((val = startswith(option, "offset="))) {
 240
 241                 r = safe_atou64(val, &arg_offset);
 242                 if (r < 0)
 243                         return log_error_errno(r, "Failed to parse %s: %m", option);
 244
 245         } else if ((val = startswith(option, "skip="))) {
 246
 247                 r = safe_atou64(val, &arg_skip);
 248                 if (r < 0)
 249                         return log_error_errno(r, "Failed to parse %s: %m", option);
 250
 251         } else if (!streq(option, "none"))
 252                 log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
 253
 254         return 0;
 255 }
 256
 257 static int parse_options(const char *options) {
 258         const char *word, *state;
 259         size_t l;
 260         int r;
 261
 262         assert(options);
 263
 264         FOREACH_WORD_SEPARATOR(word, l, options, ",", state) {
 265                 _cleanup_free_ char *o;
 266
 267                 o = strndup(word, l);
 268                 if (!o)
 269                         return -ENOMEM;
 270                 r = parse_one_option(o);
 271                 if (r < 0)
 272                         return r;
 273         }
 274
 275         /* sanity-check options */
 276         if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) {
 277                 if (arg_offset)
 278                       log_warning("offset= ignored with type %s", arg_type);
 279                 if (arg_skip)
 280                       log_warning("skip= ignored with type %s", arg_type);
 281         }
 282
 283         return 0;
 284 }
 285
 286 static char* disk_description(const char *path) {
 287         static const char name_fields[] =
 288                 "ID_PART_ENTRY_NAME\0"
 289                 "DM_NAME\0"
 290                 "ID_MODEL_FROM_DATABASE\0"
 291                 "ID_MODEL\0";
 292
 293         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 294         const char *i, *name;
 295         struct stat st;
 296
 297         assert(path);
 298
 299         if (stat(path, &st) < 0)
 300                 return NULL;
 301
 302         if (!S_ISBLK(st.st_mode))
 303                 return NULL;
 304
 305         if (sd_device_new_from_devnum(&device, 'b', st.st_rdev) < 0)
 306                 return NULL;
 307
 308         NULSTR_FOREACH(i, name_fields)
 309                 if (sd_device_get_property_value(device, i, &name) >= 0 &&
 310                     !isempty(name))
 311                         return strdup(name);
 312
 313         return NULL;
 314 }
 315
 316 static char *disk_mount_point(const char *label) {
 317         _cleanup_free_ char *device = NULL;
 318         _cleanup_endmntent_ FILE *f = NULL;
 319         struct mntent *m;
 320
 321         /* Yeah, we don't support native systemd unit files here for now */
 322
 323         if (asprintf(&device, "/dev/mapper/%s", label) < 0)
 324                 return NULL;
 325
 326         f = setmntent("/etc/fstab", "re");
 327         if (!f)
 328                 return NULL;
 329
 330         while ((m = getmntent(f)))
 331                 if (path_equal(m->mnt_fsname, device))
 332                         return strdup(m->mnt_dir);
 333
 334         return NULL;
 335 }
 336
 337 static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) {
 338         _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *text = NULL, *disk_path = NULL;
 339         _cleanup_strv_free_erase_ char **passwords = NULL;
 340         const char *name = NULL;
 341         char **p, *id;
 342         int r = 0;
 343
 344         assert(vol);
 345         assert(src);
 346         assert(ret);
 347
 348         description = disk_description(src);
 349         mount_point = disk_mount_point(vol);
 350
 351         disk_path = cescape(src);
 352         if (!disk_path)
 353                 return log_oom();
 354
 355         if (description && streq(vol, description))
 356                 /* If the description string is simply the
 357                  * volume name, then let's not show this
 358                  * twice */
 359                 description = mfree(description);
 360
 361         if (mount_point && description)
 362                 r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point);
 363         else if (mount_point)
 364                 r = asprintf(&name_buffer, "%s on %s", vol, mount_point);
 365         else if (description)
 366                 r = asprintf(&name_buffer, "%s (%s)", description, vol);
 367
 368         if (r < 0)
 369                 return log_oom();
 370
 371         name = name_buffer ? name_buffer : vol;
 372
 373         if (asprintf(&text, "Please enter passphrase for disk %s:", name) < 0)
 374                 return log_oom();
 375
 376         id = strjoina("cryptsetup:", disk_path);
 377
 378         r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until,
 379                               ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED),
 380                               &passwords);
 381         if (r < 0)
 382                 return log_error_errno(r, "Failed to query password: %m");
 383
 384         if (arg_verify) {
 385                 _cleanup_strv_free_erase_ char **passwords2 = NULL;
 386
 387                 assert(strv_length(passwords) == 1);
 388
 389                 if (asprintf(&text, "Please enter passphrase for disk %s (verification):", name) < 0)
 390                         return log_oom();
 391
 392                 id = strjoina("cryptsetup-verification:", disk_path);
 393
 394                 r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2);
 395                 if (r < 0)
 396                         return log_error_errno(r, "Failed to query verification password: %m");
 397
 398                 assert(strv_length(passwords2) == 1);
 399
 400                 if (!streq(passwords[0], passwords2[0])) {
 401                         log_warning("Passwords did not match, retrying.");
 402                         return -EAGAIN;
 403                 }
 404         }
 405
 406         strv_uniq(passwords);
 407
 408         STRV_FOREACH(p, passwords) {
 409                 char *c;
 410
 411                 if (strlen(*p)+1 >= arg_key_size)
 412                         continue;
 413
 414                 /* Pad password if necessary */
 415                 c = new(char, arg_key_size);
 416                 if (!c)
 417                         return log_oom();
 418
 419                 strncpy(c, *p, arg_key_size);
 420                 free_and_replace(*p, c);
 421         }
 422
 423         *ret = TAKE_PTR(passwords);
 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; /* log with the actual error, but 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_errno(r, "Failed to activate using password file '%s'. (Key data not correct?)", key_file);
 474                         return -EAGAIN; /* log the actual error, but return EAGAIN */
 475                 }
 476
 477                 return log_error_errno(r, "Failed to load tcrypt superblock on device %s: %m", crypt_get_device_name(cd));
 478         }
 479
 480         r = crypt_activate_by_volume_key(cd, name, NULL, 0, flags);
 481         if (r < 0)
 482                 return log_error_errno(r, "Failed to activate tcrypt device %s: %m", crypt_get_device_name(cd));
 483
 484         return 0;
 485 }
 486
 487 static int attach_luks_or_plain(struct crypt_device *cd,
 488                                 const char *name,
 489                                 const char *key_file,
 490                                 char **passwords,
 491                                 uint32_t flags) {
 492         int r = 0;
 493         bool pass_volume_key = false;
 494
 495         assert(cd);
 496         assert(name);
 497         assert(key_file || passwords);
 498
 499         if ((!arg_type && !crypt_get_type(cd)) || streq_ptr(arg_type, CRYPT_PLAIN)) {
 500                 struct crypt_params_plain params = {
 501                         .offset = arg_offset,
 502                         .skip = arg_skip,
 503 #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
 504                         .sector_size = arg_sector_size,
 505 #endif
 506                 };
 507                 const char *cipher, *cipher_mode;
 508                 _cleanup_free_ char *truncated_cipher = NULL;
 509
 510                 if (arg_hash) {
 511                         /* plain isn't a real hash type. it just means "use no hash" */
 512                         if (!streq(arg_hash, "plain"))
 513                                 params.hash = arg_hash;
 514                 } else if (!key_file)
 515                         /* for CRYPT_PLAIN, the behaviour of cryptsetup
 516                          * package is to not hash when a key file is provided */
 517                         params.hash = "ripemd160";
 518
 519                 if (arg_cipher) {
 520                         size_t l;
 521
 522                         l = strcspn(arg_cipher, "-");
 523                         truncated_cipher = strndup(arg_cipher, l);
 524                         if (!truncated_cipher)
 525                                 return log_oom();
 526
 527                         cipher = truncated_cipher;
 528                         cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain";
 529                 } else {
 530                         cipher = "aes";
 531                         cipher_mode = "cbc-essiv:sha256";
 532                 }
 533
 534                 /* for CRYPT_PLAIN limit reads from keyfile to key length, and ignore keyfile-size */
 535                 arg_keyfile_size = arg_key_size;
 536
 537                 /* In contrast to what the name crypt_format() might suggest this doesn't actually format
 538                  * anything, it just configures encryption parameters when used for plain mode. */
 539                 r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, &params);
 540                 if (r < 0)
 541                         return log_error_errno(r, "Loading of cryptographic parameters failed: %m");
 542
 543                 /* hash == NULL implies the user passed "plain" */
 544                 pass_volume_key = (params.hash == NULL);
 545         }
 546
 547         log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
 548                  crypt_get_cipher(cd),
 549                  crypt_get_cipher_mode(cd),
 550                  crypt_get_volume_key_size(cd)*8,
 551                  crypt_get_device_name(cd));
 552
 553         if (key_file) {
 554                 r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags);
 555                 if (r == -EPERM) {
 556                         log_error_errno(r, "Failed to activate with key file '%s'. (Key data incorrect?)", key_file);
 557                         return -EAGAIN; /* Log actual error, but return EAGAIN */
 558                 }
 559                 if (r == -EINVAL) {
 560                         log_error_errno(r, "Failed to activate with key file '%s'. (Key file missing?)", key_file);
 561                         return -EAGAIN; /* Log actual error, but return EAGAIN */
 562                 }
 563                 if (r < 0)
 564                         return log_error_errno(r, "Failed to activate with key file '%s': %m", key_file);
 565         } else {
 566                 char **p;
 567
 568                 r = -EINVAL;
 569                 STRV_FOREACH(p, passwords) {
 570                         if (pass_volume_key)
 571                                 r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags);
 572                         else
 573                                 r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags);
 574                         if (r >= 0)
 575                                 break;
 576                 }
 577                 if (r == -EPERM) {
 578                         log_error_errno(r, "Failed to activate with specified passphrase. (Passphrase incorrect?)");
 579                         return -EAGAIN; /* log actual error, but return EAGAIN */
 580                 }
 581                 if (r < 0)
 582                         return log_error_errno(r, "Failed to activate with specified passphrase: %m");
 583         }
 584
 585         return r;
 586 }
 587
 588 static int help(void) {
 589         _cleanup_free_ char *link = NULL;
 590         int r;
 591
 592         r = terminal_urlify_man("systemd-cryptsetup@.service", "8", &link);
 593         if (r < 0)
 594                 return log_oom();
 595
 596         printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
 597                "%s detach VOLUME\n\n"
 598                "Attaches or detaches an encrypted block device.\n"
 599                "\nSee the %s for details.\n"
 600                , program_invocation_short_name
 601                , program_invocation_short_name
 602                , link
 603         );
 604
 605         return 0;
 606 }
 607
 608 static uint32_t determine_flags(void) {
 609         uint32_t flags = 0;
 610
 611         if (arg_readonly)
 612                 flags |= CRYPT_ACTIVATE_READONLY;
 613
 614         if (arg_discards)
 615                 flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
 616
 617         if (arg_same_cpu_crypt)
 618                 flags |= CRYPT_ACTIVATE_SAME_CPU_CRYPT;
 619
 620         if (arg_submit_from_crypt_cpus)
 621                 flags |= CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS;
 622
 623         return flags;
 624 }
 625
 626 static int run(int argc, char *argv[]) {
 627         _cleanup_(crypt_freep) struct crypt_device *cd = NULL;
 628         int r;
 629
 630         if (argc <= 1)
 631                 return help();
 632
 633         if (argc < 3) {
 634                 log_error("This program requires at least two arguments.");
 635                 return -EINVAL;
 636         }
 637
 638         log_setup_service();
 639
 640         crypt_set_log_callback(NULL, cryptsetup_log_glue, NULL);
 641         if (DEBUG_LOGGING)
 642                 /* libcryptsetup won't even consider debug messages by default */
 643                 crypt_set_debug_level(CRYPT_DEBUG_ALL);
 644
 645         umask(0022);
 646
 647         if (streq(argv[1], "attach")) {
 648                 uint32_t flags = 0;
 649                 unsigned tries;
 650                 usec_t until;
 651                 crypt_status_info status;
 652                 const char *key_file = NULL;
 653
 654                 /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */
 655
 656                 if (argc < 4)
 657                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least two arguments.");
 658
 659                 if (argc >= 5 &&
 660                     argv[4][0] &&
 661                     !streq(argv[4], "-") &&
 662                     !streq(argv[4], "none")) {
 663
 664                         if (!path_is_absolute(argv[4]))
 665                                 log_warning("Password file path '%s' is not absolute. Ignoring.", argv[4]);
 666                         else
 667                                 key_file = argv[4];
 668                 }
 669
 670                 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
 671                         r = parse_options(argv[5]);
 672                         if (r < 0)
 673                                 return r;
 674                 }
 675
 676                 /* A delicious drop of snake oil */
 677                 mlockall(MCL_FUTURE);
 678
 679                 if (arg_header) {
 680                         log_debug("LUKS header: %s", arg_header);
 681                         r = crypt_init(&cd, arg_header);
 682                 } else
 683                         r = crypt_init(&cd, argv[3]);
 684                 if (r < 0)
 685                         return log_error_errno(r, "crypt_init() failed: %m");
 686
 687                 crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
 688
 689                 status = crypt_status(cd, argv[2]);
 690                 if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
 691                         log_info("Volume %s already active.", argv[2]);
 692                         return 0;
 693                 }
 694
 695                 flags = determine_flags();
 696
 697                 if (arg_timeout == USEC_INFINITY)
 698                         until = 0;
 699                 else
 700                         until = now(CLOCK_MONOTONIC) + arg_timeout;
 701
 702                 arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8));
 703
 704                 if (key_file) {
 705                         struct stat st;
 706
 707                         /* Ideally we'd do this on the open fd, but since this is just a
 708                          * warning it's OK to do this in two steps. */
 709                         if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005))
 710                                 log_warning("Key file %s is world-readable. This is not a good idea!", key_file);
 711                 }
 712
 713                 if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) {
 714                         r = crypt_load(cd, CRYPT_LUKS, NULL);
 715                         if (r < 0)
 716                                 return log_error_errno(r, "Failed to load LUKS superblock on device %s: %m", crypt_get_device_name(cd));
 717
 718                         if (arg_header) {
 719                                 r = crypt_set_data_device(cd, argv[3]);
 720                                 if (r < 0)
 721                                         return log_error_errno(r, "Failed to set LUKS data device %s: %m", argv[3]);
 722                         }
 723 #ifdef CRYPT_ANY_TOKEN
 724                         /* Tokens are available in LUKS2 only, but it is ok to call (and fail) with LUKS1. */
 725                         if (!key_file) {
 726                                 r = crypt_activate_by_token(cd, argv[2], CRYPT_ANY_TOKEN, NULL, flags);
 727                                 if (r >= 0) {
 728                                         log_debug("Volume %s activated with LUKS token id %i.", argv[2], r);
 729                                         return 0;
 730                                 }
 731
 732                                 log_debug_errno(r, "Token activation unsuccessful for device %s: %m", crypt_get_device_name(cd));
 733                         }
 734 #endif
 735                 }
 736
 737                 for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
 738                         _cleanup_strv_free_erase_ char **passwords = NULL;
 739
 740                         if (!key_file) {
 741                                 r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords);
 742                                 if (r == -EAGAIN)
 743                                         continue;
 744                                 if (r < 0)
 745                                         return r;
 746                         }
 747
 748                         if (streq_ptr(arg_type, CRYPT_TCRYPT))
 749                                 r = attach_tcrypt(cd, argv[2], key_file, passwords, flags);
 750                         else
 751                                 r = attach_luks_or_plain(cd,
 752                                                          argv[2],
 753                                                          key_file,
 754                                                          passwords,
 755                                                          flags);
 756                         if (r >= 0)
 757                                 break;
 758                         if (r != -EAGAIN)
 759                                 return r;
 760
 761                         /* Passphrase not correct? Let's try again! */
 762                         key_file = NULL;
 763                 }
 764
 765                 if (arg_tries != 0 && tries >= arg_tries)
 766                         return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to activate; giving up.");
 767
 768         } else if (streq(argv[1], "detach")) {
 769
 770                 r = crypt_init_by_name(&cd, argv[2]);
 771                 if (r == -ENODEV) {
 772                         log_info("Volume %s already inactive.", argv[2]);
 773                         return 0;
 774                 }
 775                 if (r < 0)
 776                         return log_error_errno(r, "crypt_init_by_name() failed: %m");
 777
 778                 crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
 779
 780                 r = crypt_deactivate(cd, argv[2]);
 781                 if (r < 0)
 782                         return log_error_errno(r, "Failed to deactivate: %m");
 783
 784         } else
 785                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", argv[1]);
 786
 787         return 0;
 788 }
 789
 790 DEFINE_MAIN_FUNCTION(run);