lib/setup.c

   1 #include <string.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include <fcntl.h>
   6 #include <errno.h>
   7
   8 #include "libcryptsetup.h"
   9 #include "luks.h"
  10 #include "internal.h"
  11
  12 struct crypt_device {
  13         char *type;
  14
  15         char *device;
  16         struct volume_key *volume_key;
  17         uint64_t timeout;
  18         uint64_t iteration_time;
  19         int tries;
  20         int password_verify;
  21
  22         /* used in CRYPT_LUKS1 */
  23         struct luks_phdr hdr;
  24         uint64_t PBKDF2_per_sec;
  25
  26         /* used in CRYPT_PLAIN */
  27         struct crypt_params_plain plain_hdr;
  28         char *plain_cipher;
  29         char *plain_cipher_mode;
  30         char *plain_uuid;
  31
  32         /* callbacks definitions */
  33         void (*log)(int level, const char *msg, void *usrptr);
  34         void *log_usrptr;
  35         int (*confirm)(const char *msg, void *usrptr);
  36         void *confirm_usrptr;
  37         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  38         void *password_usrptr;
  39 };
  40
  41 /* Log helper */
  42 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
  43 static int _debug_level = 0;
  44
  45 void crypt_set_debug_level(int level)
  46 {
  47         _debug_level = level;
  48 }
  49
  50 int crypt_get_debug_level()
  51 {
  52         return _debug_level;
  53 }
  54
  55 void crypt_log(struct crypt_device *cd, int level, const char *msg)
  56 {
  57         if (cd && cd->log)
  58                 cd->log(level, msg, cd->log_usrptr);
  59         else if (_default_log)
  60                 _default_log(level, msg, NULL);
  61 }
  62
  63 void logger(struct crypt_device *cd, int level, const char *file,
  64             int line, const char *format, ...)
  65 {
  66         va_list argp;
  67         char *target = NULL;
  68
  69         va_start(argp, format);
  70
  71         if (vasprintf(&target, format, argp) > 0) {
  72                 if (level >= 0) {
  73                         crypt_log(cd, level, target);
  74 #ifdef CRYPT_DEBUG
  75                 } else if (_debug_level)
  76                         printf("# %s:%d %s\n", file ?: "?", line, target);
  77 #else
  78                 } else if (_debug_level)
  79                         printf("# %s\n", target);
  80 #endif
  81         }
  82
  83         va_end(argp);
  84         free(target);
  85 }
  86
  87 /*
  88  * Password processing behaviour matrix of process_key
  89  *
  90  * from binary file: check if there is sufficently large key material
  91  * interactive & from fd: hash if requested, otherwise crop or pad with '0'
  92  */
  93 static char *process_key(struct crypt_device *cd, const char *hash_name,
  94                          const char *key_file, size_t key_size,
  95                          const char *pass, size_t passLen)
  96 {
  97         char *key = safe_alloc(key_size);
  98         memset(key, 0, key_size);
  99
 100         /* key is coming from binary file */
 101         if (key_file && strcmp(key_file, "-")) {
 102                 if(passLen < key_size) {
 103                         log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
 104                                 key_size, key_file);
 105                         safe_free(key);
 106                         return NULL;
 107                 }
 108                 memcpy(key, pass, key_size);
 109                 return key;
 110         }
 111
 112         /* key is coming from tty, fd or binary stdin */
 113         if (hash_name) {
 114                 if (hash(NULL, hash_name, key, key_size, pass, passLen) < 0) {
 115                         log_err(cd, _("Key processing error (using hash algorithm %s).\n"),
 116                                 hash_name);
 117                         safe_free(key);
 118                         return NULL;
 119                 }
 120         } else if (passLen > key_size) {
 121                 memcpy(key, pass, key_size);
 122         } else {
 123                 memcpy(key, pass, passLen);
 124         }
 125
 126         return key;
 127 }
 128
 129 int parse_into_name_and_mode(const char *nameAndMode, char *name, char *mode)
 130 {
 131 /* Token content stringification, see info cpp/stringification */
 132 #define str(s) #s
 133 #define xstr(s) str(s)
 134 #define scanpattern1 "%" xstr(LUKS_CIPHERNAME_L) "[^-]-%" xstr(LUKS_CIPHERMODE_L)  "s"
 135 #define scanpattern2 "%" xstr(LUKS_CIPHERNAME_L) "[^-]"
 136
 137         int r;
 138
 139         if(sscanf(nameAndMode,scanpattern1, name, mode) != 2) {
 140                 if((r = sscanf(nameAndMode,scanpattern2,name)) == 1)
 141                         strncpy(mode,"cbc-plain",10);
 142                 else
 143                         return -EINVAL;
 144         }
 145
 146         return 0;
 147
 148 #undef scanpattern1
 149 #undef scanpattern2
 150 #undef str
 151 #undef xstr
 152 }
 153
 154 static int isPLAIN(const char *type)
 155 {
 156         return (type && !strcmp(CRYPT_PLAIN, type));
 157 }
 158
 159 static int isLUKS(const char *type)
 160 {
 161         return (type && !strcmp(CRYPT_LUKS1, type));
 162 }
 163
 164 /* keyslot helpers */
 165 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 166 {
 167         if (*keyslot == CRYPT_ANY_SLOT) {
 168                 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
 169                 if (*keyslot < 0) {
 170                         log_err(cd, _("All key slots full.\n"));
 171                         return -EINVAL;
 172                 }
 173         }
 174
 175         switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
 176                 case CRYPT_SLOT_INVALID:
 177                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 178                                 *keyslot, LUKS_NUMKEYS - 1);
 179                         return -EINVAL;
 180                 case CRYPT_SLOT_INACTIVE:
 181                         break;
 182                 default:
 183                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 184                                 *keyslot);
 185                         return -EINVAL;
 186         }
 187
 188         return 0;
 189 }
 190
 191 static int verify_other_keyslot(struct crypt_device *cd,
 192                                 const char *key_file,
 193                                 unsigned int flags,
 194                                 int keyIndex)
 195 {
 196         struct volume_key *vk;
 197         crypt_keyslot_info ki;
 198         int openedIndex;
 199         char *password = NULL;
 200         unsigned int passwordLen;
 201
 202         get_key(_("Enter any remaining LUKS passphrase: "), &password,
 203                 &passwordLen, 0, key_file, cd->timeout, flags, cd);
 204         if(!password)
 205                 return -EINVAL;
 206
 207         ki = crypt_keyslot_status(cd, keyIndex);
 208         if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */
 209                 LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
 210
 211         openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
 212                                              password, passwordLen,
 213                                              &cd->hdr, &vk, cd);
 214
 215         if (ki == CRYPT_SLOT_ACTIVE)
 216                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 217         crypt_free_volume_key(vk);
 218         safe_free(password);
 219
 220         if (openedIndex < 0)
 221                 return -EPERM;
 222
 223         log_verbose(cd, _("Key slot %d verified.\n"), openedIndex);
 224         return 0;
 225 }
 226
 227 static int find_keyslot_by_passphrase(struct crypt_device *cd,
 228                                       const char *key_file,
 229                                       unsigned int flags,
 230                                       char *message)
 231 {
 232         struct volume_key *vk;
 233         char *password = NULL;
 234         unsigned int passwordLen;
 235         int keyIndex;
 236
 237         get_key(message,&password,&passwordLen, 0, key_file,
 238                 cd->timeout, flags, cd);
 239         if(!password)
 240                 return -EINVAL;
 241
 242         keyIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
 243                                           passwordLen, &cd->hdr, &vk, cd);
 244         crypt_free_volume_key(vk);
 245         safe_free(password);
 246
 247         return keyIndex;
 248 }
 249
 250 static int device_check_and_adjust(struct crypt_device *cd,
 251                                    const char *device,
 252                                    uint64_t *size, uint64_t *offset,
 253                                    int *read_only)
 254 {
 255         struct device_infos infos;
 256
 257         if (!device || get_device_infos(device, &infos, cd) < 0) {
 258                 log_err(cd, _("Cannot get info about device %s.\n"),
 259                         device ?: "[none]");
 260                 return -ENOTBLK;
 261         }
 262
 263         if (!*size) {
 264                 *size = infos.size;
 265                 if (!*size) {
 266                         log_err(cd, _("Device %s has zero size.\n"), device);
 267                         return -ENOTBLK;
 268                 }
 269                 if (*size < *offset) {
 270                         log_err(cd, _("Device %s is too small.\n"), device);
 271                         return -EINVAL;
 272                 }
 273                 *size -= *offset;
 274         }
 275
 276         if (infos.readonly)
 277                 *read_only = 1;
 278
 279         log_dbg("Calculated device size is %" PRIu64 " sectors (%s), offset %" PRIu64 ".",
 280                 *size, *read_only ? "RO" : "RW", *offset);
 281         return 0;
 282 }
 283
 284 static int luks_remove_helper(struct crypt_device *cd,
 285                               int key_slot,
 286                               const char *other_key_file,
 287                               const char *key_file,
 288                               int verify)
 289 {
 290         crypt_keyslot_info ki;
 291         int r = -EINVAL;
 292
 293         if (key_slot == CRYPT_ANY_SLOT) {
 294                 key_slot = find_keyslot_by_passphrase(cd, key_file, 0,
 295                                 _("Enter LUKS passphrase to be deleted: "));
 296                 if(key_slot < 0) {
 297                         r = -EPERM;
 298                         goto out;
 299                 }
 300
 301                 log_std(cd, _("key slot %d selected for deletion.\n"), key_slot);
 302         }
 303
 304         ki = crypt_keyslot_status(cd, key_slot);
 305         if (ki == CRYPT_SLOT_INVALID) {
 306                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 307                         key_slot, LUKS_NUMKEYS - 1);
 308                 r = -EINVAL;
 309                 goto out;
 310         }
 311         if (ki <= CRYPT_SLOT_INACTIVE) {
 312                 log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
 313                 r = -EINVAL;
 314                 goto out;
 315         }
 316
 317         if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm &&
 318             !(cd->confirm(_("This is the last keyslot."
 319                             " Device will become unusable after purging this key."),
 320                          cd->confirm_usrptr))) {
 321                 r = -EINVAL;
 322                 goto out;
 323         }
 324
 325         if(verify)
 326                 r = verify_other_keyslot(cd, other_key_file, 0, key_slot);
 327         else
 328                 r = 0;
 329
 330         if (!r)
 331                 r = crypt_keyslot_destroy(cd, key_slot);
 332 out:
 333         return (r < 0) ? r : 0;
 334 }
 335
 336 static int create_device_helper(struct crypt_device *cd,
 337                                 const char *name,
 338                                 const char *hash,
 339                                 const char *cipher,
 340                                 const char *cipher_mode,
 341                                 const char *key_file,
 342                                 const char *key,
 343                                 unsigned int keyLen,
 344                                 int key_size,
 345                                 uint64_t size,
 346                                 uint64_t skip,
 347                                 uint64_t offset,
 348                                 const char *uuid,
 349                                 int read_only,
 350                                 unsigned int flags,
 351                                 int reload)
 352 {
 353         crypt_status_info ci;
 354         char *dm_cipher = NULL;
 355         char *processed_key = NULL;
 356         int r;
 357
 358         if (!name)
 359                 return -EINVAL;
 360
 361         ci = crypt_status(cd, name);
 362         if (ci == CRYPT_INVALID)
 363                 return -EINVAL;
 364
 365         if (reload && ci < CRYPT_ACTIVE)
 366                 return -EINVAL;
 367
 368         if (!reload && ci >= CRYPT_ACTIVE) {
 369                 log_err(cd, _("Device %s already exists.\n"), name);
 370                 return -EEXIST;
 371         }
 372
 373         if (key_size < 0 || key_size > 1024) {
 374                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 375                 return -EINVAL;
 376         }
 377
 378         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 379         if (r)
 380                 return r;
 381
 382         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 383                 return -ENOMEM;
 384
 385         processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
 386         if (!processed_key)
 387                 return -ENOENT;
 388
 389         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 390                              key_size, processed_key, read_only, reload);
 391
 392         free(dm_cipher);
 393         safe_free(processed_key);
 394         return r;
 395 }
 396
 397 static int open_from_hdr_and_vk(struct crypt_device *cd,
 398                                 struct volume_key *vk,
 399                                 const char *name,
 400                                 uint32_t flags)
 401 {
 402         uint64_t size, offset;
 403         char *cipher;
 404         int read_only, no_uuid, r;
 405
 406         size = 0;
 407         offset = crypt_get_data_offset(cd);
 408         read_only = flags & CRYPT_ACTIVATE_READONLY;
 409         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 410
 411         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 412         if (r)
 413                 return r;
 414
 415         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 416                      crypt_get_cipher_mode(cd)) < 0)
 417                 r = -ENOMEM;
 418         else
 419                 r = dm_create_device(name, cd->device, cipher, cd->type,
 420                                      no_uuid ? NULL : crypt_get_uuid(cd),
 421                                      size, 0, offset, vk->keylength, vk->key,
 422                                      read_only, 0);
 423         free(cipher);
 424         return r;
 425 }
 426
 427 static void log_wrapper(int level, const char *msg, void *usrptr)
 428 {
 429         void (*xlog)(int level, char *msg) = usrptr;
 430         xlog(level, (char *)msg);
 431 }
 432
 433 static int yesDialog_wrapper(const char *msg, void *usrptr)
 434 {
 435         int (*xyesDialog)(char *msg) = usrptr;
 436         return xyesDialog((char*)msg);
 437 }
 438
 439 int crypt_confirm(struct crypt_device *cd, const char *msg)
 440 {
 441         if (!cd || !cd->confirm)
 442                 return 1;
 443         else
 444                 return cd->confirm(msg, cd->confirm_usrptr);
 445 }
 446
 447 static void key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 448                               unsigned int *key_len, int force_verify)
 449 {
 450         int r, flags = 0;
 451
 452         if (cd->password) {
 453                 *key = safe_alloc(MAX_TTY_PASSWORD_LEN);
 454                 if (*key)
 455                         return;
 456                 r = cd->password(msg, *key, (size_t)key_len, cd->password_usrptr);
 457                 if (r < 0) {
 458                         safe_free(*key);
 459                         *key = NULL;
 460                 } else
 461                         *key_len = r;
 462         } else {
 463                 if (force_verify || cd->password_verify)
 464                         flags |= CRYPT_FLAG_VERIFY_IF_POSSIBLE;
 465                 get_key(msg, key, key_len, 0, NULL, cd->timeout, flags, cd);
 466         }
 467 }
 468
 469 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 470                                              struct volume_key **vk)
 471 {
 472         char *prompt = NULL, *passphrase_read = NULL;
 473         unsigned int passphrase_size_read;
 474         int r = -EINVAL, tries = cd->tries;
 475
 476         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
 477                 return -ENOMEM;
 478
 479         *vk = NULL;
 480         do {
 481                 if (*vk)
 482                         crypt_free_volume_key(*vk);
 483                 *vk = NULL;
 484
 485                 key_from_terminal(cd, prompt, &passphrase_read,
 486                                   &passphrase_size_read, 0);
 487                 if(!passphrase_read) {
 488                         r = -EINVAL;
 489                         break;
 490                 }
 491
 492                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 493                                            passphrase_size_read, &cd->hdr, vk, cd);
 494                 safe_free(passphrase_read);
 495                 passphrase_read = NULL;
 496         } while (r == -EPERM && (--tries > 0));
 497
 498         if (r < 0 && *vk) {
 499                 crypt_free_volume_key(*vk);
 500                 *vk = NULL;
 501         }
 502         free(prompt);
 503
 504         return r;
 505
 506 }
 507
 508 static void key_from_file(struct crypt_device *cd, char *msg,
 509                           char **key, unsigned int *key_len,
 510                           const char *key_file, size_t key_size)
 511 {
 512         get_key(msg, key, key_len, key_size, key_file, cd->timeout, 0, cd);
 513 }
 514
 515 static int _crypt_init(struct crypt_device **cd,
 516                        const char *type,
 517                        struct crypt_options *options,
 518                        int load, int need_dm)
 519 {
 520         int init_by_name, r;
 521
 522         /* if it is plain device and mapping table is being reloaded
 523         initialize it by name*/
 524         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 525
 526         /* Some of old API calls do not require DM in kernel,
 527            fake initialisation by initialise it with kernel_check disabled */
 528         if (!need_dm)
 529                 (void)dm_init(NULL, 0);
 530         if (init_by_name)
 531                 r = crypt_init_by_name(cd, options->name);
 532         else
 533                 r = crypt_init(cd, options->device);
 534         if (!need_dm)
 535                 dm_exit();
 536
 537         if (r)
 538                 return -EINVAL;
 539
 540         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 541         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 542
 543         crypt_set_timeout(*cd, options->timeout);
 544         crypt_set_password_retry(*cd, options->tries);
 545         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 546         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 547
 548         if (load && !init_by_name)
 549                 r = crypt_load(*cd, type, NULL);
 550
 551         if (!r && type && !(*cd)->type) {
 552                 (*cd)->type = strdup(type);
 553                 if (!(*cd)->type)
 554                         r = -ENOMEM;
 555         }
 556
 557         if (r)
 558                 crypt_free(*cd);
 559
 560         return r;
 561 }
 562
 563 void crypt_set_log_callback(struct crypt_device *cd,
 564         void (*log)(int level, const char *msg, void *usrptr),
 565         void *usrptr)
 566 {
 567         if (!cd)
 568                 _default_log = log;
 569         else {
 570                 cd->log = log;
 571                 cd->log_usrptr = usrptr;
 572         }
 573 }
 574
 575 void crypt_set_confirm_callback(struct crypt_device *cd,
 576         int (*confirm)(const char *msg, void *usrptr),
 577         void *usrptr)
 578 {
 579         cd->confirm = confirm;
 580         cd->confirm_usrptr = usrptr;
 581 }
 582
 583 void crypt_set_password_callback(struct crypt_device *cd,
 584         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 585         void *usrptr)
 586 {
 587         cd->password = password;
 588         cd->password_usrptr = usrptr;
 589 }
 590
 591 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 592  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 593  *          flags, icb */
 594 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 595 {
 596         struct crypt_device *cd = NULL;
 597         char *key = NULL;
 598         unsigned int keyLen;
 599         int r;
 600
 601         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 602         if (r)
 603                 return r;
 604
 605         get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 606                 options->key_file, cd->timeout, options->flags, cd);
 607         if (!key)
 608                 r = -ENOENT;
 609         else
 610                 r = create_device_helper(cd, options->name, options->hash,
 611                         options->cipher, NULL, options->key_file, key, keyLen,
 612                         options->key_size, options->size, options->skip,
 613                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 614                         options->flags, update);
 615
 616         safe_free(key);
 617         crypt_free(cd);
 618         return r;
 619 }
 620
 621 int crypt_create_device(struct crypt_options *options)
 622 {
 623         return crypt_create_and_update_device(options, 0);
 624 }
 625
 626 int crypt_update_device(struct crypt_options *options)
 627 {
 628         return crypt_create_and_update_device(options, 1);
 629 }
 630
 631 /* OPTIONS: name, size, icb */
 632 int crypt_resize_device(struct crypt_options *options)
 633 {
 634         struct crypt_device *cd = NULL;
 635         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 636         char *type = NULL;
 637         uint64_t size, skip, offset;
 638         int key_size, read_only, r;
 639
 640         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 641
 642         if (dm_init(NULL, 1) < 0)
 643                 return -ENOSYS;
 644
 645         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 646                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 647         if (r < 0) {
 648                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 649                 goto out;
 650         }
 651
 652         /* Try to determine type of device from UUID */
 653         type = CRYPT_PLAIN;
 654         if (uuid) {
 655                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 656                         type = CRYPT_PLAIN;
 657                         free (uuid);
 658                         uuid = NULL;
 659                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 660                         type = CRYPT_LUKS1;
 661         }
 662
 663         if (!options->device)
 664                 options->device = device;
 665
 666         r = _crypt_init(&cd, type, options, 1, 1);
 667         if (r)
 668                 goto out;
 669
 670         size = options->size;
 671         r = device_check_and_adjust(cd, device, &size, &offset, &read_only);
 672         if (r)
 673                 goto out;
 674
 675         r = dm_create_device(options->name, device, cipher, type,
 676                              crypt_get_uuid(cd), size, skip, offset,
 677                              key_size, key, read_only, 1);
 678 out:
 679         safe_free(key);
 680         free(cipher);
 681         if (options->device == device)
 682                 options->device = NULL;
 683         free(device);
 684         free(uuid);
 685         crypt_free(cd);
 686         dm_exit();
 687         return r;
 688 }
 689
 690 /* OPTIONS: name, icb */
 691 int crypt_query_device(struct crypt_options *options)
 692 {
 693         int read_only, r;
 694
 695         log_dbg("Query device %s.", options->name);
 696
 697         if (dm_init(NULL, 1) < 0)
 698                 return -ENOSYS;
 699
 700         r = dm_status_device(options->name);
 701         if (r < 0)
 702                 goto out;
 703
 704         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 705                             &options->skip, &options->offset, (char **)&options->cipher,
 706                             &options->key_size, NULL, &read_only, NULL, NULL);
 707         if (r >= 0) {
 708                 if (read_only)
 709                         options->flags |= CRYPT_FLAG_READONLY;
 710
 711                 options->flags |= CRYPT_FLAG_FREE_DEVICE;
 712                 options->flags |= CRYPT_FLAG_FREE_CIPHER;
 713
 714                 r = 1;
 715         }
 716 out:
 717         if (r == -ENODEV)
 718                 r = 0;
 719
 720         dm_exit();
 721         return r;
 722 }
 723
 724 /* OPTIONS: name, icb */
 725 int crypt_remove_device(struct crypt_options *options)
 726 {
 727         struct crypt_device *cd = NULL;
 728         int r;
 729
 730         r = crypt_init_by_name(&cd, options->name);
 731         if (r == 0)
 732                 r = crypt_deactivate(cd, options->name);
 733
 734         crypt_free(cd);
 735         return r;
 736
 737 }
 738
 739 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 740  *          new_key_file, iteration_time, timeout, flags, icb */
 741 int crypt_luksFormat(struct crypt_options *options)
 742 {
 743         char cipherName[LUKS_CIPHERNAME_L];
 744         char cipherMode[LUKS_CIPHERMODE_L];
 745         char *password=NULL;
 746         unsigned int passwordLen;
 747         struct crypt_device *cd = NULL;
 748         struct crypt_params_luks1 cp = {
 749                 .hash = options->hash,
 750                 .data_alignment = options->align_payload
 751         };
 752         int r;
 753
 754         r = parse_into_name_and_mode(options->cipher, cipherName, cipherMode);
 755         if(r < 0) {
 756                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 757                 return r;
 758         }
 759
 760         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 761                 return r;
 762
 763         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 764                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 765                         options->key_slot, LUKS_NUMKEYS - 1);
 766                 r = -EINVAL;
 767                 goto out;
 768         }
 769
 770         get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 771                 options->new_key_file, options->timeout, options->flags, cd);
 772
 773         if(!password) {
 774                 r = -EINVAL;
 775                 goto out;
 776         }
 777
 778         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 779                          NULL, NULL, options->key_size, &cp);
 780         if (r < 0)
 781                 goto out;
 782
 783         /* Add keyslot using internally stored volume key generated during format */
 784         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 785                                             password, passwordLen);
 786 out:
 787         crypt_free(cd);
 788         safe_free(password);
 789         return (r < 0) ? r : 0;
 790 }
 791
 792 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 793 int crypt_luksOpen(struct crypt_options *options)
 794 {
 795         struct crypt_device *cd = NULL;
 796         uint32_t flags = 0;
 797         int r;
 798
 799         if (!options->name)
 800                 return -EINVAL;
 801
 802         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 803         if (r)
 804                 return r;
 805
 806         if (options->flags & CRYPT_FLAG_READONLY)
 807                 flags |= CRYPT_ACTIVATE_READONLY;
 808
 809         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 810                 flags |= CRYPT_ACTIVATE_NO_UUID;
 811
 812         if (options->key_file)
 813                 r = crypt_activate_by_keyfile(cd, options->name,
 814                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 815                         flags);
 816         else
 817                 r = crypt_activate_by_passphrase(cd, options->name,
 818                         CRYPT_ANY_SLOT, options->passphrase,
 819                         options->passphrase ? strlen(options->passphrase) : 0,
 820                         flags);
 821
 822         crypt_free(cd);
 823         return (r < 0) ? r : 0;
 824 }
 825
 826 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 827 int crypt_luksKillSlot(struct crypt_options *options)
 828 {
 829         struct crypt_device *cd = NULL;
 830         int r;
 831
 832         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 833         if (r)
 834                 return r;
 835
 836         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 837                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 838
 839         crypt_free(cd);
 840         return (r < 0) ? r : 0;
 841 }
 842
 843 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 844 int crypt_luksRemoveKey(struct crypt_options *options)
 845 {
 846         struct crypt_device *cd = NULL;
 847         int r;
 848
 849         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 850         if (r)
 851                 return r;
 852
 853         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 854                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 855
 856         crypt_free(cd);
 857         return (r < 0) ? r : 0;
 858 }
 859
 860
 861 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 862             iteration_time, timeout, icb */
 863 int crypt_luksAddKey(struct crypt_options *options)
 864 {
 865         struct crypt_device *cd = NULL;
 866         int r = -EINVAL;
 867
 868         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 869         if (r)
 870                 return r;
 871
 872         if (options->key_file || options->new_key_file)
 873                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 874                                                  options->key_file, 0,
 875                                                  options->new_key_file, 0);
 876         else
 877                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 878                                                     NULL, 0, NULL, 0);
 879
 880         crypt_free(cd);
 881         return (r < 0) ? r : 0;
 882 }
 883
 884 /* OPTIONS: device, icb */
 885 int crypt_luksUUID(struct crypt_options *options)
 886 {
 887         struct crypt_device *cd = NULL;
 888         char *uuid;
 889         int r;
 890
 891         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 892         if (r)
 893                 return r;
 894
 895         uuid = (char *)crypt_get_uuid(cd);
 896         log_std(cd, uuid ?: "");
 897         log_std(cd, "\n");
 898         crypt_free(cd);
 899         return 0;
 900 }
 901
 902 /* OPTIONS: device, icb */
 903 int crypt_isLuks(struct crypt_options *options)
 904 {
 905         struct crypt_device *cd = NULL;
 906         int r;
 907
 908         log_dbg("Check device %s for LUKS header.", options->device);
 909
 910         r = init_crypto(cd);
 911         if (r < 0)
 912                 return r;
 913
 914         r = crypt_init(&cd, options->device);
 915         if (r < 0)
 916                 return -EINVAL;
 917
 918         /* Do print fail here, no need to crypt_load() */
 919         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 920
 921         crypt_free(cd);
 922         return r;
 923 }
 924
 925 /* OPTIONS: device, icb */
 926 int crypt_luksDump(struct crypt_options *options)
 927 {
 928         struct crypt_device *cd = NULL;
 929         int r;
 930
 931         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 932         if(r < 0)
 933                 return r;
 934
 935         r = crypt_dump(cd);
 936
 937         crypt_free(cd);
 938         return 0;
 939 }
 940
 941 void crypt_get_error(char *buf, size_t size)
 942 {
 943         const char *error = get_error();
 944
 945         if (!buf || size < 1)
 946                 set_error(NULL);
 947         else if (error) {
 948                 strncpy(buf, error, size - 1);
 949                 buf[size - 1] = '\0';
 950                 set_error(NULL);
 951         } else
 952                 buf[0] = '\0';
 953 }
 954
 955 void crypt_put_options(struct crypt_options *options)
 956 {
 957         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 958                 free((char *)options->device);
 959                 options->device = NULL;
 960                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 961         }
 962         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 963                 free((char *)options->cipher);
 964                 options->cipher = NULL;
 965                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 966         }
 967 }
 968
 969 const char *crypt_get_dir(void)
 970 {
 971         return dm_get_dir();
 972 }
 973
 974 /////////////////////////////////
 975 //
 976 // New API
 977 //
 978
 979 int crypt_init(struct crypt_device **cd, const char *device)
 980 {
 981         struct crypt_device *h = NULL;
 982
 983         if (!cd)
 984                 return -EINVAL;
 985
 986         log_dbg("Allocating crypt device %s context.", device);
 987
 988         if (device && !device_ready(NULL, device, O_RDONLY))
 989                 return -ENOTBLK;
 990
 991         if (!(h = malloc(sizeof(struct crypt_device))))
 992                 return -ENOMEM;
 993
 994         memset(h, 0, sizeof(*h));
 995
 996         if (device) {
 997                 h->device = strdup(device);
 998                 if (!h->device) {
 999                         free(h);
1000                         return -ENOMEM;
1001                 }
1002         } else
1003                 h->device = NULL;
1004
1005         if (dm_init(h, 1) < 0) {
1006                 free(h);
1007                 return -ENOSYS;
1008         }
1009
1010         h->iteration_time = 1000;
1011         h->password_verify = 0;
1012         h->tries = 3;
1013         *cd = h;
1014         return 0;
1015 }
1016
1017 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1018 {
1019         crypt_status_info ci;
1020         char *device = NULL;
1021         int r;
1022
1023         log_dbg("Allocating crypt device context by device %s.", name);
1024
1025         ci = crypt_status(NULL, name);
1026         if (ci == CRYPT_INVALID)
1027                 return -ENODEV;
1028
1029         if (ci < CRYPT_ACTIVE) {
1030                 log_err(NULL, _("Device %s is not active.\n"), name);
1031                 return -ENODEV;
1032         }
1033
1034         r = dm_query_device(name, &device, NULL, NULL, NULL,
1035                             NULL, NULL, NULL, NULL, NULL, NULL);
1036
1037         /* Underlying device disappeared but mapping still active */
1038         if (r >= 0 && !device)
1039                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1040                             name);
1041
1042         if (r >= 0)
1043                 r = crypt_init(cd, device);
1044
1045         free(device);
1046         return r;
1047 }
1048
1049 static int _crypt_format_plain(struct crypt_device *cd,
1050                                const char *cipher,
1051                                const char *cipher_mode,
1052                                const char *uuid,
1053                                size_t volume_key_size,
1054                                struct crypt_params_plain *params)
1055 {
1056         if (!cipher || !cipher_mode) {
1057                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1058                 return -EINVAL;
1059         }
1060
1061         if (volume_key_size > 1024) {
1062                 log_err(cd, _("Invalid key size.\n"));
1063                 return -EINVAL;
1064         }
1065
1066         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
1067         if (!cd->volume_key)
1068                 return -ENOMEM;
1069
1070         cd->plain_cipher = strdup(cipher);
1071         cd->plain_cipher_mode = strdup(cipher_mode);
1072
1073         if (uuid)
1074                 cd->plain_uuid = strdup(uuid);
1075
1076         if (params && params->hash)
1077                 cd->plain_hdr.hash = strdup(params->hash);
1078
1079         cd->plain_hdr.offset = params ? params->offset : 0;
1080         cd->plain_hdr.skip = params ? params->skip : 0;
1081
1082         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1083                 return -ENOMEM;
1084
1085         return 0;
1086 }
1087
1088 static int _crypt_format_luks1(struct crypt_device *cd,
1089                                const char *cipher,
1090                                const char *cipher_mode,
1091                                const char *uuid,
1092                                const char *volume_key,
1093                                size_t volume_key_size,
1094                                struct crypt_params_luks1 *params)
1095 {
1096         int r;
1097         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1098         unsigned long alignment_offset = 0;
1099
1100         if (!cd->device) {
1101                 log_err(cd, _("Can't format LUKS without device.\n"));
1102                 return -EINVAL;
1103         }
1104
1105         if (volume_key)
1106                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
1107                                                       volume_key);
1108         else
1109                 cd->volume_key = crypt_generate_volume_key(volume_key_size);
1110
1111         if(!cd->volume_key)
1112                 return -ENOMEM;
1113
1114         if (params && params->data_alignment)
1115                 required_alignment = params->data_alignment * SECTOR_SIZE;
1116         else
1117                 get_topology_alignment(cd->device, &required_alignment,
1118                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1119
1120         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1121                                (params && params->hash) ? params->hash : "sha1",
1122                                uuid, LUKS_STRIPES,
1123                                required_alignment / SECTOR_SIZE,
1124                                alignment_offset / SECTOR_SIZE,
1125                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1126         if(r < 0)
1127                 return r;
1128
1129         /* Wipe first 8 sectors - fs magic numbers etc. */
1130         r = wipe_device_header(cd->device, 8);
1131         if(r < 0) {
1132                 log_err(cd, _("Can't wipe header on device %s.\n"), cd->device);
1133                 return r;
1134         }
1135
1136         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1137
1138         return r;
1139 }
1140
1141 int crypt_format(struct crypt_device *cd,
1142         const char *type,
1143         const char *cipher,
1144         const char *cipher_mode,
1145         const char *uuid,
1146         const char *volume_key,
1147         size_t volume_key_size,
1148         void *params)
1149 {
1150         int r;
1151
1152         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)");
1153
1154         if (!type)
1155                 return -EINVAL;
1156
1157         r = init_crypto(cd);
1158         if (r < 0)
1159                 return r;
1160
1161         if (isPLAIN(type))
1162                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1163                                         uuid, volume_key_size, params);
1164         else if (isLUKS(type))
1165                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1166                                         uuid, volume_key, volume_key_size, params);
1167         else {
1168                 /* FIXME: allow plugins here? */
1169                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1170                 r = -EINVAL;
1171         }
1172
1173         if (!r && !(cd->type = strdup(type)))
1174                 r = -ENOMEM;
1175
1176         if (r < 0) {
1177                 crypt_free_volume_key(cd->volume_key);
1178                 cd->volume_key = NULL;
1179         }
1180
1181         return r;
1182 }
1183
1184 int crypt_load(struct crypt_device *cd,
1185                const char *requested_type,
1186                void *params)
1187 {
1188         struct luks_phdr hdr;
1189         int r;
1190
1191         log_dbg("Trying to load %s crypt type from device %s.",
1192                 requested_type ?: "any", cd->device ?: "(none)");
1193
1194         if (!cd->device)
1195                 return -EINVAL;
1196
1197         if (requested_type && !isLUKS(requested_type))
1198                 return -EINVAL;
1199
1200         r = init_crypto(cd);
1201         if (r < 0)
1202                 return r;
1203
1204         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1205
1206         if (!r) {
1207                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1208                 cd->type = strdup(requested_type);
1209                 if (!cd->type)
1210                         r = -ENOMEM;
1211         }
1212
1213         return r;
1214 }
1215
1216 int crypt_header_backup(struct crypt_device *cd,
1217                         const char *requested_type,
1218                         const char *backup_file)
1219 {
1220         int r;
1221
1222         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1223                 return -EINVAL;
1224
1225         r = init_crypto(cd);
1226         if (r < 0)
1227                 return r;
1228
1229         log_dbg("Requested header backup of device %s (%s) to "
1230                 "file %s.", cd->device, requested_type, backup_file);
1231
1232         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1233 }
1234
1235 int crypt_header_restore(struct crypt_device *cd,
1236                          const char *requested_type,
1237                          const char *backup_file)
1238 {
1239         int r;
1240
1241         if (requested_type && !isLUKS(requested_type))
1242                 return -EINVAL;
1243
1244         /* Some hash functions need initialized gcrypt library */
1245         r = init_crypto(cd);
1246         if (r < 0)
1247                 return r;
1248
1249         log_dbg("Requested header restore to device %s (%s) from "
1250                 "file %s.", cd->device, requested_type, backup_file);
1251
1252         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1253 }
1254
1255 void crypt_free(struct crypt_device *cd)
1256 {
1257         if (cd) {
1258                 log_dbg("Releasing crypt device %s context.", cd->device);
1259
1260                 dm_exit();
1261                 if (cd->volume_key)
1262                         crypt_free_volume_key(cd->volume_key);
1263
1264                 free(cd->device);
1265                 free(cd->type);
1266
1267                 /* used in plain device only */
1268                 free((char*)cd->plain_hdr.hash);
1269                 free(cd->plain_cipher);
1270                 free(cd->plain_cipher_mode);
1271                 free(cd->plain_uuid);
1272
1273                 free(cd);
1274         }
1275 }
1276
1277 int crypt_suspend(struct crypt_device *cd,
1278                   const char *name)
1279 {
1280         crypt_status_info ci;
1281         int r, suspended = 0;
1282
1283         log_dbg("Suspending volume %s.", name);
1284
1285         ci = crypt_status(NULL, name);
1286         if (ci < CRYPT_ACTIVE) {
1287                 log_err(cd, _("Volume %s is not active.\n"), name);
1288                 return -EINVAL;
1289         }
1290
1291         if (!cd && dm_init(NULL, 1) < 0)
1292                 return -ENOSYS;
1293
1294         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1295                             NULL, NULL, NULL, NULL, &suspended, NULL);
1296         if (r < 0)
1297                 goto out;
1298
1299         if (suspended) {
1300                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1301                 r = -EINVAL;
1302                 goto out;
1303         }
1304
1305         r = dm_suspend_and_wipe_key(name);
1306         if (r == -ENOTSUP)
1307                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1308         else if (r)
1309                 log_err(cd, "Error during suspending device %s.\n", name);
1310 out:
1311         if (!cd)
1312                 dm_exit();
1313         return r;
1314 }
1315
1316 int crypt_resume_by_passphrase(struct crypt_device *cd,
1317                                const char *name,
1318                                int keyslot,
1319                                const char *passphrase,
1320                                size_t passphrase_size)
1321 {
1322         struct volume_key *vk = NULL;
1323         int r, suspended = 0;
1324
1325         log_dbg("Resuming volume %s.", name);
1326
1327         if (!isLUKS(cd->type)) {
1328                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1329                 r = -EINVAL;
1330                 goto out;
1331         }
1332
1333         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1334                             NULL, NULL, NULL, NULL, &suspended, NULL);
1335         if (r < 0)
1336                 return r;
1337
1338         if (!suspended) {
1339                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1340                 return -EINVAL;
1341         }
1342
1343         if (passphrase) {
1344                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1345                                            passphrase_size, &cd->hdr, &vk, cd);
1346         } else
1347                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1348
1349         if (r >= 0) {
1350                 keyslot = r;
1351                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1352                 if (r == -ENOTSUP)
1353                         log_err(cd, "Resume is not supported for device %s.\n", name);
1354                 else if (r)
1355                         log_err(cd, "Error during resuming device %s.\n", name);
1356         } else
1357                 r = keyslot;
1358 out:
1359         crypt_free_volume_key(vk);
1360         return r < 0 ? r : keyslot;
1361 }
1362
1363 int crypt_resume_by_keyfile(struct crypt_device *cd,
1364                             const char *name,
1365                             int keyslot,
1366                             const char *keyfile,
1367                             size_t keyfile_size)
1368 {
1369         struct volume_key *vk = NULL;
1370         char *passphrase_read = NULL;
1371         unsigned int passphrase_size_read;
1372         int r, suspended = 0;
1373
1374         log_dbg("Resuming volume %s.", name);
1375
1376         if (!isLUKS(cd->type)) {
1377                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1378                 r = -EINVAL;
1379                 goto out;
1380         }
1381
1382         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1383                             NULL, NULL, NULL, NULL, &suspended, NULL);
1384         if (r < 0)
1385                 return r;
1386
1387         if (!suspended) {
1388                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1389                 return -EINVAL;
1390         }
1391
1392         if (!keyfile)
1393                 return -EINVAL;
1394
1395         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1396                       &passphrase_size_read, keyfile, keyfile_size);
1397
1398         if(!passphrase_read)
1399                 r = -EINVAL;
1400         else {
1401                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1402                                            passphrase_size_read, &cd->hdr, &vk, cd);
1403                 safe_free(passphrase_read);
1404         }
1405
1406         if (r >= 0) {
1407                 keyslot = r;
1408                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1409                 if (r)
1410                         log_err(cd, "Error during resuming device %s.\n", name);
1411         } else
1412                 r = keyslot;
1413 out:
1414         crypt_free_volume_key(vk);
1415         return r < 0 ? r : keyslot;
1416 }
1417
1418 // slot manipulation
1419 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1420         int keyslot, // -1 any
1421         const char *passphrase, // NULL -> terminal
1422         size_t passphrase_size,
1423         const char *new_passphrase, // NULL -> terminal
1424         size_t new_passphrase_size)
1425 {
1426         struct volume_key *vk = NULL;
1427         char *password = NULL, *new_password = NULL;
1428         unsigned int passwordLen, new_passwordLen;
1429         int r;
1430
1431         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1432                 "new passphrase %sprovided.",
1433                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1434
1435         if (!isLUKS(cd->type)) {
1436                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1437                 return -EINVAL;
1438         }
1439
1440         r = keyslot_verify_or_find_empty(cd, &keyslot);
1441         if (r)
1442                 return r;
1443
1444         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1445                 /* No slots used, try to use pre-generated key in header */
1446                 if (cd->volume_key) {
1447                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1448                         r = vk ? 0 : -ENOMEM;
1449                 } else {
1450                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1451                         return -EINVAL;
1452                 }
1453         } else if (passphrase) {
1454                 /* Passphrase provided, use it to unlock existing keyslot */
1455                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1456                                            passphrase_size, &cd->hdr, &vk, cd);
1457         } else {
1458                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1459                 key_from_terminal(cd, _("Enter any passphrase: "),
1460                                   &password, &passwordLen, 0);
1461                 if (!password) {
1462                         r = -EINVAL;
1463                         goto out;
1464                 }
1465
1466                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1467                                            passwordLen, &cd->hdr, &vk, cd);
1468                 safe_free(password);
1469         }
1470
1471         if(r < 0)
1472                 goto out;
1473
1474         if (new_passphrase) {
1475                 new_password = (char *)new_passphrase;
1476                 new_passwordLen = new_passphrase_size;
1477         } else {
1478                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1479                                   &new_password, &new_passwordLen, 1);
1480                 if(!new_password) {
1481                         r = -EINVAL;
1482                         goto out;
1483                 }
1484         }
1485
1486         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1487                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1488         if(r < 0) goto out;
1489
1490         r = 0;
1491 out:
1492         if (!new_passphrase)
1493                 safe_free(new_password);
1494         crypt_free_volume_key(vk);
1495         return r ?: keyslot;
1496 }
1497
1498 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1499         int keyslot,
1500         const char *keyfile,
1501         size_t keyfile_size,
1502         const char *new_keyfile,
1503         size_t new_keyfile_size)
1504 {
1505         struct volume_key *vk=NULL;
1506         char *password=NULL; unsigned int passwordLen;
1507         char *new_password = NULL; unsigned int new_passwordLen;
1508         int r;
1509
1510         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1511                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1512
1513         if (!isLUKS(cd->type)) {
1514                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1515                 return -EINVAL;
1516         }
1517
1518         r = keyslot_verify_or_find_empty(cd, &keyslot);
1519         if (r)
1520                 return r;
1521
1522         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1523                 /* No slots used, try to use pre-generated key in header */
1524                 if (cd->volume_key) {
1525                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1526                         r = vk ? 0 : -ENOMEM;
1527                 } else {
1528                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1529                         return -EINVAL;
1530                 }
1531         } else {
1532                 /* Read password from file of (if NULL) from terminal */
1533                 if (keyfile)
1534                         key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen,
1535                                       keyfile, keyfile_size);
1536                 else
1537                         key_from_terminal(cd, _("Enter any passphrase: "),
1538                                         &password, &passwordLen, 0);
1539
1540                 if (!password)
1541                         return -EINVAL;
1542
1543                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1544                                            &cd->hdr, &vk, cd);
1545                 safe_free(password);
1546         }
1547
1548         if(r < 0)
1549                 goto out;
1550
1551         if (new_keyfile)
1552                 key_from_file(cd, _("Enter new passphrase for key slot: "),
1553                               &new_password, &new_passwordLen, new_keyfile,
1554                               new_keyfile_size);
1555         else
1556                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1557                                   &new_password, &new_passwordLen, 1);
1558
1559         if(!new_password) {
1560                 r = -EINVAL;
1561                 goto out;
1562         }
1563
1564         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1565                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1566 out:
1567         safe_free(new_password);
1568         crypt_free_volume_key(vk);
1569         return r < 0 ? r : keyslot;
1570 }
1571
1572 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1573         int keyslot,
1574         const char *volume_key,
1575         size_t volume_key_size,
1576         const char *passphrase,
1577         size_t passphrase_size)
1578 {
1579         struct volume_key *vk = NULL;
1580         int r = -EINVAL;
1581         char *new_password = NULL; unsigned int new_passwordLen;
1582
1583         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1584
1585         if (!isLUKS(cd->type)) {
1586                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1587                 return -EINVAL;
1588         }
1589
1590         if (volume_key)
1591                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1592         else if (cd->volume_key)
1593                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1594
1595         if (!vk)
1596                 return -ENOMEM;
1597
1598         r = LUKS_verify_volume_key(&cd->hdr, vk);
1599         if (r < 0) {
1600                 log_err(cd, _("Volume key does not match the volume.\n"));
1601                 goto out;
1602         }
1603
1604         r = keyslot_verify_or_find_empty(cd, &keyslot);
1605         if (r)
1606                 goto out;
1607
1608         if (!passphrase) {
1609                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1610                                   &new_password, &new_passwordLen, 1);
1611                 passphrase = new_password;
1612                 passphrase_size = new_passwordLen;
1613         }
1614
1615         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1616                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1617 out:
1618         if (new_password)
1619                 safe_free(new_password);
1620         crypt_free_volume_key(vk);
1621         return r ?: keyslot;
1622 }
1623
1624 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1625 {
1626         crypt_keyslot_info ki;
1627
1628         log_dbg("Destroying keyslot %d.", keyslot);
1629
1630         if (!isLUKS(cd->type)) {
1631                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1632                 return -EINVAL;
1633         }
1634
1635         ki = crypt_keyslot_status(cd, keyslot);
1636         if (ki == CRYPT_SLOT_INVALID) {
1637                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1638                 return -EINVAL;
1639         }
1640
1641         if (ki == CRYPT_SLOT_INACTIVE) {
1642                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1643                 return -EINVAL;
1644         }
1645
1646         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1647 }
1648
1649 // activation/deactivation of device mapping
1650 int crypt_activate_by_passphrase(struct crypt_device *cd,
1651         const char *name,
1652         int keyslot,
1653         const char *passphrase,
1654         size_t passphrase_size,
1655         uint32_t flags)
1656 {
1657         crypt_status_info ci;
1658         struct volume_key *vk = NULL;
1659         char *prompt = NULL;
1660         int r;
1661
1662         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1663                 name ? "Activating" : "Checking", name ?: "",
1664                 keyslot, passphrase ? "" : "[none] ");
1665
1666         /* plain, use hashed passphrase */
1667         if (isPLAIN(cd->type))
1668                 return create_device_helper(cd, name, cd->plain_hdr.hash,
1669                         cd->plain_cipher, cd->plain_cipher_mode, NULL, passphrase, passphrase_size,
1670                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
1671                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1672
1673         if (name) {
1674                 ci = crypt_status(NULL, name);
1675                 if (ci == CRYPT_INVALID)
1676                         return -EINVAL;
1677                 else if (ci >= CRYPT_ACTIVE) {
1678                         log_err(cd, _("Device %s already exists.\n"), name);
1679                         return -EEXIST;
1680                 }
1681         }
1682
1683         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
1684                 return -ENOMEM;
1685
1686         /* provided passphrase, do not retry */
1687         if (passphrase) {
1688                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1689                                            passphrase_size, &cd->hdr, &vk, cd);
1690         } else
1691                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1692
1693         if (r >= 0) {
1694                 keyslot = r;
1695                 if (name)
1696                         r = open_from_hdr_and_vk(cd, vk, name, flags);
1697         }
1698
1699         crypt_free_volume_key(vk);
1700         free(prompt);
1701
1702         return r < 0  ? r : keyslot;
1703 }
1704
1705 int crypt_activate_by_keyfile(struct crypt_device *cd,
1706         const char *name,
1707         int keyslot,
1708         const char *keyfile,
1709         size_t keyfile_size,
1710         uint32_t flags)
1711 {
1712         crypt_status_info ci;
1713         struct volume_key *vk = NULL;
1714         char *passphrase_read = NULL;
1715         unsigned int passphrase_size_read;
1716         int r;
1717
1718         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1719                 name ?: "", keyslot, keyfile ?: "[none]");
1720
1721         if (!isLUKS(cd->type)) {
1722                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1723                 return -EINVAL;
1724         }
1725
1726         if (name) {
1727                 ci = crypt_status(NULL, name);
1728                 if (ci == CRYPT_INVALID)
1729                         return -EINVAL;
1730                 else if (ci >= CRYPT_ACTIVE) {
1731                         log_err(cd, _("Device %s already exists.\n"), name);
1732                         return -EEXIST;
1733                 }
1734         }
1735
1736         if (!keyfile)
1737                 return -EINVAL;
1738
1739         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1740                       &passphrase_size_read, keyfile, keyfile_size);
1741         if(!passphrase_read)
1742                 r = -EINVAL;
1743         else {
1744                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1745                                            passphrase_size_read, &cd->hdr, &vk, cd);
1746                 safe_free(passphrase_read);
1747         }
1748
1749         if (r >= 0) {
1750                 keyslot = r;
1751                 if (name)
1752                         r = open_from_hdr_and_vk(cd, vk, name, flags);
1753         }
1754
1755         crypt_free_volume_key(vk);
1756
1757         return r < 0 ? r : keyslot;
1758 }
1759
1760 int crypt_activate_by_volume_key(struct crypt_device *cd,
1761         const char *name,
1762         const char *volume_key,
1763         size_t volume_key_size,
1764         uint32_t flags)
1765 {
1766         crypt_status_info ci;
1767         struct volume_key *vk;
1768         int r;
1769
1770         log_dbg("Activating volume %s by volume key.", name);
1771
1772         /* use key directly, no hash */
1773         if (isPLAIN(cd->type))
1774                 return create_device_helper(cd, name, NULL,
1775                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1776                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
1777                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1778
1779         if (!isLUKS(cd->type)) {
1780                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1781                 return -EINVAL;
1782         }
1783
1784         if (name) {
1785                 ci = crypt_status(NULL, name);
1786                 if (ci == CRYPT_INVALID)
1787                         return -EINVAL;
1788                 else if (ci >= CRYPT_ACTIVE) {
1789                         log_err(cd, _("Device %s already exists.\n"), name);
1790                         return -EEXIST;
1791                 }
1792         }
1793
1794         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1795         if (!vk)
1796                 return -ENOMEM;
1797         r = LUKS_verify_volume_key(&cd->hdr, vk);
1798
1799         if (r == -EPERM)
1800                 log_err(cd, _("Volume key does not match the volume.\n"));
1801
1802         if (!r && name)
1803                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1804
1805         crypt_free_volume_key(vk);
1806
1807         return r;
1808 }
1809
1810 int crypt_deactivate(struct crypt_device *cd, const char *name)
1811 {
1812         int r;
1813
1814         if (!name)
1815                 return -EINVAL;
1816
1817         log_dbg("Deactivating volume %s.", name);
1818
1819         if (!cd && dm_init(NULL, 1) < 0)
1820                 return -ENOSYS;
1821
1822         switch (crypt_status(cd, name)) {
1823                 case CRYPT_ACTIVE:
1824                         r = dm_remove_device(name, 0, 0);
1825                         break;
1826                 case CRYPT_BUSY:
1827                         log_err(cd, _("Device %s is busy.\n"), name);
1828                         r = -EBUSY;
1829                         break;
1830                 case CRYPT_INACTIVE:
1831                         log_err(cd, _("Device %s is not active.\n"), name);
1832                         r = -ENODEV;
1833                         break;
1834                 default:
1835                         log_err(cd, _("Invalid device %s.\n"), name);
1836                         r = -EINVAL;
1837         }
1838
1839         if (!cd)
1840                 dm_exit();
1841
1842         return r;
1843 }
1844
1845 // misc helper functions
1846 int crypt_volume_key_get(struct crypt_device *cd,
1847         int keyslot,
1848         char *volume_key,
1849         size_t *volume_key_size,
1850         const char *passphrase,
1851         size_t passphrase_size)
1852 {
1853         struct volume_key *vk;
1854         char *processed_key = NULL;
1855         int r, key_len;
1856
1857         key_len = crypt_get_volume_key_size(cd);
1858         if (key_len > *volume_key_size) {
1859                 log_err(cd, _("Volume key buffer too small.\n"));
1860                 return -ENOMEM;
1861         }
1862
1863         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
1864                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
1865                                             passphrase, passphrase_size);
1866                 if (!processed_key) {
1867                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
1868                         return -EINVAL;
1869                 }
1870                 memcpy(volume_key, processed_key, key_len);
1871                 *volume_key_size = key_len;
1872                 safe_free(processed_key);
1873                 return 0;
1874         }
1875
1876         if (isLUKS(cd->type)) {
1877                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1878                                         passphrase_size, &cd->hdr, &vk, cd);
1879
1880                 if (r >= 0) {
1881                         memcpy(volume_key, vk->key, vk->keylength);
1882                         *volume_key_size = vk->keylength;
1883                 }
1884
1885                 crypt_free_volume_key(vk);
1886                 return r;
1887         }
1888
1889         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
1890         return -EINVAL;
1891 }
1892
1893 int crypt_volume_key_verify(struct crypt_device *cd,
1894         const char *volume_key,
1895         size_t volume_key_size)
1896 {
1897         struct volume_key *vk;
1898         int r;
1899
1900         if (!isLUKS(cd->type)) {
1901                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1902                 return -EINVAL;
1903         }
1904
1905         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1906         if (!vk)
1907                 return -ENOMEM;
1908
1909         r = LUKS_verify_volume_key(&cd->hdr, vk);
1910
1911         if (r == -EPERM)
1912                 log_err(cd, _("Volume key does not match the volume.\n"));
1913
1914         crypt_free_volume_key(vk);
1915
1916         return r;
1917 }
1918
1919 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
1920 {
1921         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
1922         cd->timeout = timeout_sec;
1923 }
1924
1925 void crypt_set_password_retry(struct crypt_device *cd, int tries)
1926 {
1927         log_dbg("Password retry count set to %d.", tries);
1928         cd->tries = tries;
1929 }
1930
1931 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
1932 {
1933         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
1934         cd->iteration_time = iteration_time_ms;
1935 }
1936
1937 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
1938 {
1939         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
1940         cd->password_verify = password_verify ? 1 : 0;
1941 }
1942
1943 int crypt_memory_lock(struct crypt_device *cd, int lock)
1944 {
1945         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
1946 }
1947
1948 // reporting
1949 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
1950 {
1951         int r;
1952
1953         if (!cd && dm_init(NULL, 1) < 0)
1954                 return CRYPT_INVALID;
1955
1956         r = dm_status_device(name);
1957
1958         if (!cd)
1959                 dm_exit();
1960
1961         if (r < 0 && r != -ENODEV)
1962                 return CRYPT_INVALID;
1963
1964         if (r == 0)
1965                 return CRYPT_ACTIVE;
1966
1967         if (r > 0)
1968                 return CRYPT_BUSY;
1969
1970         return CRYPT_INACTIVE;
1971 }
1972
1973 static void hexprintICB(struct crypt_device *cd, char *d, int n)
1974 {
1975         int i;
1976         for(i = 0; i < n; i++)
1977                 log_std(cd, "%02hhx ", (char)d[i]);
1978 }
1979
1980 int crypt_dump(struct crypt_device *cd)
1981 {
1982         int i;
1983         if (!isLUKS(cd->type)) { //FIXME
1984                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1985                 return -EINVAL;
1986         }
1987
1988         log_std(cd, "LUKS header information for %s\n\n", cd->device);
1989         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
1990         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
1991         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
1992         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
1993         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
1994         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
1995         log_std(cd, "MK digest:     \t");
1996         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
1997         log_std(cd, "\n");
1998         log_std(cd, "MK salt:       \t");
1999         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
2000         log_std(cd, "\n               \t");
2001         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2002         log_std(cd, "\n");
2003         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2004         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2005         for(i = 0; i < LUKS_NUMKEYS; i++) {
2006                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2007                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2008                         log_std(cd, "\tIterations:         \t%d\n",
2009                                 cd->hdr.keyblock[i].passwordIterations);
2010                         log_std(cd, "\tSalt:               \t");
2011                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2012                                     LUKS_SALTSIZE/2);
2013                         log_std(cd, "\n\t                      \t");
2014                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2015                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2016                         log_std(cd, "\n");
2017
2018                         log_std(cd, "\tKey material offset:\t%d\n",
2019                                 cd->hdr.keyblock[i].keyMaterialOffset);
2020                         log_std(cd, "\tAF stripes:            \t%d\n",
2021                                 cd->hdr.keyblock[i].stripes);
2022                 }
2023                 else
2024                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2025         }
2026
2027         log_std(cd, "DNAME: %s\n", crypt_get_device_name(cd) ?: "");
2028
2029         return 0;
2030 }
2031
2032 const char *crypt_get_cipher(struct crypt_device *cd)
2033 {
2034         if (isPLAIN(cd->type))
2035                 return cd->plain_cipher;
2036
2037         if (isLUKS(cd->type))
2038                 return cd->hdr.cipherName;
2039
2040         return NULL;
2041 }
2042
2043 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2044 {
2045         if (isPLAIN(cd->type))
2046                 return cd->plain_cipher_mode;
2047
2048         if (isLUKS(cd->type))
2049                 return cd->hdr.cipherMode;
2050
2051         return NULL;
2052 }
2053
2054 const char *crypt_get_uuid(struct crypt_device *cd)
2055 {
2056         if (isLUKS(cd->type))
2057                 return cd->hdr.uuid;
2058
2059         return NULL;
2060 }
2061
2062 const char *crypt_get_device_name(struct crypt_device *cd)
2063 {
2064         return cd->device;
2065 }
2066
2067 int crypt_get_volume_key_size(struct crypt_device *cd)
2068 {
2069         if (isPLAIN(cd->type))
2070                 return cd->volume_key->keylength;
2071
2072         if (isLUKS(cd->type))
2073                 return cd->hdr.keyBytes;
2074
2075         return 0;
2076 }
2077
2078 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2079 {
2080         if (isPLAIN(cd->type))
2081                 return cd->plain_hdr.offset;
2082
2083         if (isLUKS(cd->type))
2084                 return cd->hdr.payloadOffset;
2085
2086         return 0;
2087 }
2088
2089 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2090 {
2091         if (!isLUKS(cd->type)) {
2092                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2093                 return CRYPT_SLOT_INVALID;
2094         }
2095
2096         return LUKS_keyslot_info(&cd->hdr, keyslot);
2097 }