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 luks_masterkey *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 luks_masterkey *mk;
 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, &mk, cd);
 214
 215         if (ki == CRYPT_SLOT_ACTIVE)
 216                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 217         LUKS_dealloc_masterkey(mk);
 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 luks_masterkey *mk;
 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, &mk, cd);
 244         LUKS_dealloc_masterkey(mk);
 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_mk(struct crypt_device *cd,
 398                                 struct luks_masterkey *mk,
 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, mk->keyLength, mk->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 luks_masterkey **mk)
 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         *mk = NULL;
 480         do {
 481                 if (*mk)
 482                         LUKS_dealloc_masterkey(*mk);
 483                 *mk = 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, mk, cd);
 494                 safe_free(passphrase_read);
 495                 passphrase_read = NULL;
 496         } while (r == -EPERM && (--tries > 0));
 497
 498         if (r < 0 && *mk) {
 499                 LUKS_dealloc_masterkey(*mk);
 500                 *mk = 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 == -ENODEV) {
 702                 dm_exit();
 703                 return 0;
 704         }
 705
 706         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 707                             &options->skip, &options->offset, (char **)&options->cipher,
 708                             &options->key_size, NULL, &read_only, NULL, NULL);
 709
 710         dm_exit();
 711         if (r < 0)
 712                 return r;
 713
 714         if (read_only)
 715                 options->flags |= CRYPT_FLAG_READONLY;
 716
 717         options->flags |= CRYPT_FLAG_FREE_DEVICE;
 718         options->flags |= CRYPT_FLAG_FREE_CIPHER;
 719
 720         return 1;
 721 }
 722
 723 /* OPTIONS: name, icb */
 724 int crypt_remove_device(struct crypt_options *options)
 725 {
 726         struct crypt_device *cd = NULL;
 727         int r;
 728
 729         r = crypt_init_by_name(&cd, options->name);
 730         if (r == 0)
 731                 r = crypt_deactivate(cd, options->name);
 732
 733         crypt_free(cd);
 734         return r;
 735
 736 }
 737
 738 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 739  *          new_key_file, iteration_time, timeout, flags, icb */
 740 int crypt_luksFormat(struct crypt_options *options)
 741 {
 742         char cipherName[LUKS_CIPHERNAME_L];
 743         char cipherMode[LUKS_CIPHERMODE_L];
 744         char *password=NULL;
 745         unsigned int passwordLen;
 746         struct crypt_device *cd = NULL;
 747         struct crypt_params_luks1 cp = {
 748                 .hash = options->hash,
 749                 .data_alignment = options->align_payload
 750         };
 751         int r;
 752
 753         r = parse_into_name_and_mode(options->cipher, cipherName, cipherMode);
 754         if(r < 0) {
 755                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 756                 return r;
 757         }
 758
 759         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 760                 return r;
 761
 762         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 763                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 764                         options->key_slot, LUKS_NUMKEYS - 1);
 765                 r = -EINVAL;
 766                 goto out;
 767         }
 768
 769         get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 770                 options->new_key_file, options->timeout, options->flags, cd);
 771
 772         if(!password) {
 773                 r = -EINVAL;
 774                 goto out;
 775         }
 776
 777         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 778                          NULL, NULL, options->key_size, &cp);
 779         if (r < 0)
 780                 goto out;
 781
 782         /* Add keyslot using internally stored volume key generated during format */
 783         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 784                                             password, passwordLen);
 785 out:
 786         crypt_free(cd);
 787         safe_free(password);
 788         return (r < 0) ? r : 0;
 789 }
 790
 791 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 792 int crypt_luksOpen(struct crypt_options *options)
 793 {
 794         struct crypt_device *cd = NULL;
 795         uint32_t flags = 0;
 796         int r;
 797
 798         if (!options->name)
 799                 return -EINVAL;
 800
 801         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 802         if (r)
 803                 return r;
 804
 805         if (options->flags & CRYPT_FLAG_READONLY)
 806                 flags |= CRYPT_ACTIVATE_READONLY;
 807
 808         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 809                 flags |= CRYPT_ACTIVATE_NO_UUID;
 810
 811         if (options->key_file)
 812                 r = crypt_activate_by_keyfile(cd, options->name,
 813                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 814                         flags);
 815         else
 816                 r = crypt_activate_by_passphrase(cd, options->name,
 817                         CRYPT_ANY_SLOT, options->passphrase,
 818                         options->passphrase ? strlen(options->passphrase) : 0,
 819                         flags);
 820
 821         crypt_free(cd);
 822         return (r < 0) ? r : 0;
 823 }
 824
 825 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 826 int crypt_luksKillSlot(struct crypt_options *options)
 827 {
 828         struct crypt_device *cd = NULL;
 829         int r;
 830
 831         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 832         if (r)
 833                 return r;
 834
 835         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 836                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 837
 838         crypt_free(cd);
 839         return (r < 0) ? r : 0;
 840 }
 841
 842 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 843 int crypt_luksRemoveKey(struct crypt_options *options)
 844 {
 845         struct crypt_device *cd = NULL;
 846         int r;
 847
 848         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 849         if (r)
 850                 return r;
 851
 852         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 853                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 854
 855         crypt_free(cd);
 856         return (r < 0) ? r : 0;
 857 }
 858
 859
 860 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 861             iteration_time, timeout, icb */
 862 int crypt_luksAddKey(struct crypt_options *options)
 863 {
 864         struct crypt_device *cd = NULL;
 865         int r = -EINVAL;
 866
 867         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 868         if (r)
 869                 return r;
 870
 871         if (options->key_file || options->new_key_file)
 872                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 873                                                  options->key_file, 0,
 874                                                  options->new_key_file, 0);
 875         else
 876                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 877                                                     NULL, 0, NULL, 0);
 878
 879         crypt_free(cd);
 880         return (r < 0) ? r : 0;
 881 }
 882
 883 /* OPTIONS: device, icb */
 884 int crypt_luksUUID(struct crypt_options *options)
 885 {
 886         struct crypt_device *cd = NULL;
 887         char *uuid;
 888         int r;
 889
 890         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 891         if (r)
 892                 return r;
 893
 894         uuid = (char *)crypt_get_uuid(cd);
 895         log_std(cd, uuid ?: "");
 896         log_std(cd, "\n");
 897         crypt_free(cd);
 898         return 0;
 899 }
 900
 901 /* OPTIONS: device, icb */
 902 int crypt_isLuks(struct crypt_options *options)
 903 {
 904         struct crypt_device *cd = NULL;
 905         int r;
 906
 907         log_dbg("Check device %s for LUKS header.", options->device);
 908
 909         if (init_crypto()) {
 910                 log_err(cd, _("Cannot initialize crypto backend.\n"));
 911                 return -ENOSYS;
 912         }
 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                                struct crypt_params_plain *params)
1054 {
1055         if (!cipher || !cipher_mode) {
1056                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1057                 return -EINVAL;
1058         }
1059
1060         if (cd->volume_key->keyLength > 1024) {
1061                 log_err(cd, _("Invalid key size.\n"));
1062                 return -EINVAL;
1063         }
1064
1065         cd->plain_cipher = strdup(cipher);
1066         cd->plain_cipher_mode = strdup(cipher_mode);
1067
1068         if (uuid)
1069                 cd->plain_uuid = strdup(uuid);
1070
1071         if (params && params->hash)
1072                 cd->plain_hdr.hash = strdup(params->hash);
1073
1074         cd->plain_hdr.offset = params ? params->offset : 0;
1075         cd->plain_hdr.skip = params ? params->skip : 0;
1076
1077         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1078                 return -ENOMEM;
1079
1080         return 0;
1081 }
1082
1083 static int _crypt_format_luks1(struct crypt_device *cd,
1084                                const char *cipher,
1085                                const char *cipher_mode,
1086                                const char *uuid,
1087                                struct crypt_params_luks1 *params)
1088 {
1089         int r;
1090         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1091         unsigned long alignment_offset = 0;
1092
1093         if (!cd->device) {
1094                 log_err(cd, _("Can't format LUKS without device.\n"));
1095                 return -EINVAL;
1096         }
1097
1098         if (params && params->data_alignment)
1099                 required_alignment = params->data_alignment * SECTOR_SIZE;
1100         else
1101                 get_topology_alignment(cd->device, &required_alignment,
1102                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1103
1104         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1105                                (params && params->hash) ? params->hash : "sha1",
1106                                uuid, LUKS_STRIPES,
1107                                required_alignment / SECTOR_SIZE,
1108                                alignment_offset / SECTOR_SIZE,
1109                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1110         if(r < 0)
1111                 return r;
1112
1113         /* Wipe first 8 sectors - fs magic numbers etc. */
1114         r = wipe_device_header(cd->device, 8);
1115         if(r < 0) {
1116                 log_err(cd, _("Can't wipe header on device %s.\n"), cd->device);
1117                 return r;
1118         }
1119
1120         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1121
1122         return r;
1123 }
1124
1125 int crypt_format(struct crypt_device *cd,
1126         const char *type,
1127         const char *cipher,
1128         const char *cipher_mode,
1129         const char *uuid,
1130         const char *volume_key,
1131         size_t volume_key_size,
1132         void *params)
1133 {
1134         int r;
1135
1136         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)");
1137
1138         if (!type)
1139                 return -EINVAL;
1140
1141         /* Some hash functions need initialized gcrypt library */
1142         if (init_crypto()) {
1143                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1144                 return -ENOSYS;
1145         }
1146
1147         if (volume_key)
1148                 cd->volume_key = LUKS_alloc_masterkey(volume_key_size,
1149                                                       volume_key);
1150         else
1151                 cd->volume_key = LUKS_generate_masterkey(volume_key_size);
1152
1153         if(!cd->volume_key)
1154                 return -ENOMEM;
1155
1156         if (isPLAIN(type))
1157                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1158                                         uuid, params);
1159         else if (isLUKS(type))
1160                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1161                                         uuid, params);
1162         else {
1163                 /* FIXME: allow plugins here? */
1164                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1165                 r = -EINVAL;
1166         }
1167
1168         if (!r && !(cd->type = strdup(type)))
1169                 r = -ENOMEM;
1170
1171         if (r < 0) {
1172                 LUKS_dealloc_masterkey(cd->volume_key);
1173                 cd->volume_key = NULL;
1174         }
1175
1176         return r;
1177 }
1178
1179 int crypt_load(struct crypt_device *cd,
1180                const char *requested_type,
1181                void *params)
1182 {
1183         struct luks_phdr hdr;
1184         int r;
1185
1186         log_dbg("Trying to load %s crypt type from device %s.",
1187                 requested_type ?: "any", cd->device ?: "(none)");
1188
1189         if (!cd->device)
1190                 return -EINVAL;
1191
1192         if (requested_type && !isLUKS(requested_type))
1193                 return -EINVAL;
1194
1195         /* Some hash functions need initialized gcrypt library */
1196         if (init_crypto()) {
1197                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1198                 return -ENOSYS;
1199         }
1200
1201         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1202
1203         if (!r) {
1204                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1205                 cd->type = strdup(requested_type);
1206                 if (!cd->type)
1207                         r = -ENOMEM;
1208         }
1209
1210         return r;
1211 }
1212
1213 int crypt_header_backup(struct crypt_device *cd,
1214                         const char *requested_type,
1215                         const char *backup_file)
1216 {
1217         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1218                 return -EINVAL;
1219
1220         /* Some hash functions need initialized gcrypt library */
1221         if (init_crypto()) {
1222                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1223                 return -ENOSYS;
1224         }
1225
1226         log_dbg("Requested header backup of device %s (%s) to "
1227                 "file %s.", cd->device, requested_type, backup_file);
1228
1229         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1230 }
1231
1232 int crypt_header_restore(struct crypt_device *cd,
1233                          const char *requested_type,
1234                          const char *backup_file)
1235 {
1236         if (requested_type && !isLUKS(requested_type))
1237                 return -EINVAL;
1238
1239         /* Some hash functions need initialized gcrypt library */
1240         if (init_crypto()) {
1241                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1242                 return -ENOSYS;
1243         }
1244
1245         log_dbg("Requested header restore to device %s (%s) from "
1246                 "file %s.", cd->device, requested_type, backup_file);
1247
1248         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1249 }
1250
1251 void crypt_free(struct crypt_device *cd)
1252 {
1253         if (cd) {
1254                 log_dbg("Releasing crypt device %s context.", cd->device);
1255
1256                 dm_exit();
1257                 if (cd->volume_key)
1258                         LUKS_dealloc_masterkey(cd->volume_key);
1259
1260                 free(cd->device);
1261                 free(cd->type);
1262
1263                 /* used in plain device only */
1264                 free((char*)cd->plain_hdr.hash);
1265                 free(cd->plain_cipher);
1266                 free(cd->plain_cipher_mode);
1267                 free(cd->plain_uuid);
1268
1269                 free(cd);
1270         }
1271 }
1272
1273 int crypt_suspend(struct crypt_device *cd,
1274                   const char *name)
1275 {
1276         crypt_status_info ci;
1277         int r, suspended = 0;
1278
1279         log_dbg("Suspending volume %s.", name);
1280
1281         ci = crypt_status(NULL, name);
1282         if (ci < CRYPT_ACTIVE) {
1283                 log_err(cd, _("Volume %s is not active.\n"), name);
1284                 return -EINVAL;
1285         }
1286
1287         if (!cd && dm_init(NULL, 1) < 0)
1288                 return -ENOSYS;
1289
1290         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1291                             NULL, NULL, NULL, NULL, &suspended, NULL);
1292         if (r < 0)
1293                 goto out;
1294
1295         if (suspended) {
1296                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1297                 r = -EINVAL;
1298                 goto out;
1299         }
1300
1301         r = dm_suspend_and_wipe_key(name);
1302         if (r == -ENOTSUP)
1303                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1304         else if (r)
1305                 log_err(cd, "Error during suspending device %s.\n", name);
1306 out:
1307         if (!cd)
1308                 dm_exit();
1309         return r;
1310 }
1311
1312 int crypt_resume_by_passphrase(struct crypt_device *cd,
1313                                const char *name,
1314                                int keyslot,
1315                                const char *passphrase,
1316                                size_t passphrase_size)
1317 {
1318         struct luks_masterkey *mk = NULL;
1319         int r, suspended = 0;
1320
1321         log_dbg("Resuming volume %s.", name);
1322
1323         if (!isLUKS(cd->type)) {
1324                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1325                 r = -EINVAL;
1326                 goto out;
1327         }
1328
1329         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1330                             NULL, NULL, NULL, NULL, &suspended, NULL);
1331         if (r < 0)
1332                 return r;
1333
1334         if (!suspended) {
1335                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1336                 return -EINVAL;
1337         }
1338
1339         if (passphrase) {
1340                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1341                                            passphrase_size, &cd->hdr, &mk, cd);
1342         } else
1343                 r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
1344
1345         if (r >= 0) {
1346                 keyslot = r;
1347                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1348                 if (r == -ENOTSUP)
1349                         log_err(cd, "Resume is not supported for device %s.\n", name);
1350                 else if (r)
1351                         log_err(cd, "Error during resuming device %s.\n", name);
1352         } else
1353                 r = keyslot;
1354 out:
1355         LUKS_dealloc_masterkey(mk);
1356         return r < 0 ? r : keyslot;
1357 }
1358
1359 int crypt_resume_by_keyfile(struct crypt_device *cd,
1360                             const char *name,
1361                             int keyslot,
1362                             const char *keyfile,
1363                             size_t keyfile_size)
1364 {
1365         struct luks_masterkey *mk = NULL;
1366         char *passphrase_read = NULL;
1367         unsigned int passphrase_size_read;
1368         int r, suspended = 0;
1369
1370         log_dbg("Resuming volume %s.", name);
1371
1372         if (!isLUKS(cd->type)) {
1373                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1374                 r = -EINVAL;
1375                 goto out;
1376         }
1377
1378         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1379                             NULL, NULL, NULL, NULL, &suspended, NULL);
1380         if (r < 0)
1381                 return r;
1382
1383         if (!suspended) {
1384                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1385                 return -EINVAL;
1386         }
1387
1388         if (!keyfile)
1389                 return -EINVAL;
1390
1391         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1392                       &passphrase_size_read, keyfile, keyfile_size);
1393
1394         if(!passphrase_read)
1395                 r = -EINVAL;
1396         else {
1397                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1398                                            passphrase_size_read, &cd->hdr, &mk, cd);
1399                 safe_free(passphrase_read);
1400         }
1401
1402         if (r >= 0) {
1403                 keyslot = r;
1404                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1405                 if (r)
1406                         log_err(cd, "Error during resuming device %s.\n", name);
1407         } else
1408                 r = keyslot;
1409 out:
1410         LUKS_dealloc_masterkey(mk);
1411         return r < 0 ? r : keyslot;
1412 }
1413
1414 // slot manipulation
1415 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1416         int keyslot, // -1 any
1417         const char *passphrase, // NULL -> terminal
1418         size_t passphrase_size,
1419         const char *new_passphrase, // NULL -> terminal
1420         size_t new_passphrase_size)
1421 {
1422         struct luks_masterkey *mk = NULL;
1423         char *password = NULL, *new_password = NULL;
1424         unsigned int passwordLen, new_passwordLen;
1425         int r;
1426
1427         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1428                 "new passphrase %sprovided.",
1429                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1430
1431         if (!isLUKS(cd->type)) {
1432                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1433                 return -EINVAL;
1434         }
1435
1436         r = keyslot_verify_or_find_empty(cd, &keyslot);
1437         if (r)
1438                 return r;
1439
1440         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1441                 /* No slots used, try to use pre-generated key in header */
1442                 if (cd->volume_key) {
1443                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1444                         r = mk ? 0 : -ENOMEM;
1445                 } else {
1446                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1447                         return -EINVAL;
1448                 }
1449         } else if (passphrase) {
1450                 /* Passphrase provided, use it to unlock existing keyslot */
1451                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1452                                            passphrase_size, &cd->hdr, &mk, cd);
1453         } else {
1454                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1455                 key_from_terminal(cd, _("Enter any passphrase: "),
1456                                   &password, &passwordLen, 0);
1457                 if (!password) {
1458                         r = -EINVAL;
1459                         goto out;
1460                 }
1461
1462                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1463                                            passwordLen, &cd->hdr, &mk, cd);
1464                 safe_free(password);
1465         }
1466
1467         if(r < 0)
1468                 goto out;
1469
1470         if (new_passphrase) {
1471                 new_password = (char *)new_passphrase;
1472                 new_passwordLen = new_passphrase_size;
1473         } else {
1474                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1475                                   &new_password, &new_passwordLen, 1);
1476                 if(!new_password) {
1477                         r = -EINVAL;
1478                         goto out;
1479                 }
1480         }
1481
1482         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1483                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1484         if(r < 0) goto out;
1485
1486         r = 0;
1487 out:
1488         if (!new_passphrase)
1489                 safe_free(new_password);
1490         LUKS_dealloc_masterkey(mk);
1491         return r ?: keyslot;
1492 }
1493
1494 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1495         int keyslot,
1496         const char *keyfile,
1497         size_t keyfile_size,
1498         const char *new_keyfile,
1499         size_t new_keyfile_size)
1500 {
1501         struct luks_masterkey *mk=NULL;
1502         char *password=NULL; unsigned int passwordLen;
1503         char *new_password = NULL; unsigned int new_passwordLen;
1504         int r;
1505
1506         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1507                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1508
1509         if (!isLUKS(cd->type)) {
1510                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1511                 return -EINVAL;
1512         }
1513
1514         r = keyslot_verify_or_find_empty(cd, &keyslot);
1515         if (r)
1516                 return r;
1517
1518         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1519                 /* No slots used, try to use pre-generated key in header */
1520                 if (cd->volume_key) {
1521                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1522                         r = mk ? 0 : -ENOMEM;
1523                 } else {
1524                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1525                         return -EINVAL;
1526                 }
1527         } else {
1528                 /* Read password from file of (if NULL) from terminal */
1529                 if (keyfile)
1530                         key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen,
1531                                       keyfile, keyfile_size);
1532                 else
1533                         key_from_terminal(cd, _("Enter any passphrase: "),
1534                                         &password, &passwordLen, 0);
1535
1536                 if (!password)
1537                         return -EINVAL;
1538
1539                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1540                                            &cd->hdr, &mk, cd);
1541                 safe_free(password);
1542         }
1543
1544         if(r < 0)
1545                 goto out;
1546
1547         if (new_keyfile)
1548                 key_from_file(cd, _("Enter new passphrase for key slot: "),
1549                               &new_password, &new_passwordLen, new_keyfile,
1550                               new_keyfile_size);
1551         else
1552                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1553                                   &new_password, &new_passwordLen, 1);
1554
1555         if(!new_password) {
1556                 r = -EINVAL;
1557                 goto out;
1558         }
1559
1560         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1561                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1562 out:
1563         safe_free(new_password);
1564         LUKS_dealloc_masterkey(mk);
1565         return r < 0 ? r : keyslot;
1566 }
1567
1568 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1569         int keyslot,
1570         const char *volume_key,
1571         size_t volume_key_size,
1572         const char *passphrase,
1573         size_t passphrase_size)
1574 {
1575         struct luks_masterkey *mk = NULL;
1576         int r = -EINVAL;
1577         char *new_password = NULL; unsigned int new_passwordLen;
1578
1579         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1580
1581         if (!isLUKS(cd->type)) {
1582                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1583                 return -EINVAL;
1584         }
1585
1586         if (volume_key)
1587                 mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1588         else if (cd->volume_key)
1589                 mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1590
1591         if (!mk)
1592                 return -ENOMEM;
1593
1594         r = LUKS_verify_master_key(&cd->hdr, mk);
1595         if (r < 0) {
1596                 log_err(cd, _("Volume key does not match the volume.\n"));
1597                 goto out;
1598         }
1599
1600         r = keyslot_verify_or_find_empty(cd, &keyslot);
1601         if (r)
1602                 goto out;
1603
1604         if (!passphrase) {
1605                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1606                                   &new_password, &new_passwordLen, 1);
1607                 passphrase = new_password;
1608                 passphrase_size = new_passwordLen;
1609         }
1610
1611         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1612                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1613 out:
1614         if (new_password)
1615                 safe_free(new_password);
1616         LUKS_dealloc_masterkey(mk);
1617         return r ?: keyslot;
1618 }
1619
1620 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1621 {
1622         crypt_keyslot_info ki;
1623
1624         log_dbg("Destroying keyslot %d.", keyslot);
1625
1626         if (!isLUKS(cd->type)) {
1627                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1628                 return -EINVAL;
1629         }
1630
1631         ki = crypt_keyslot_status(cd, keyslot);
1632         if (ki == CRYPT_SLOT_INVALID) {
1633                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1634                 return -EINVAL;
1635         }
1636
1637         if (ki == CRYPT_SLOT_INACTIVE) {
1638                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1639                 return -EINVAL;
1640         }
1641
1642         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1643 }
1644
1645 // activation/deactivation of device mapping
1646 int crypt_activate_by_passphrase(struct crypt_device *cd,
1647         const char *name,
1648         int keyslot,
1649         const char *passphrase,
1650         size_t passphrase_size,
1651         uint32_t flags)
1652 {
1653         crypt_status_info ci;
1654         struct luks_masterkey *mk = NULL;
1655         char *prompt = NULL;
1656         int r;
1657
1658         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1659                 name ? "Activating" : "Checking", name ?: "",
1660                 keyslot, passphrase ? "" : "[none] ");
1661
1662         /* plain, use hashed passphrase */
1663         if (isPLAIN(cd->type))
1664                 return create_device_helper(cd, name, cd->plain_hdr.hash,
1665                         cd->plain_cipher, cd->plain_cipher_mode, NULL, passphrase, passphrase_size,
1666                         cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
1667                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1668
1669         if (name) {
1670                 ci = crypt_status(NULL, name);
1671                 if (ci == CRYPT_INVALID)
1672                         return -EINVAL;
1673                 else if (ci >= CRYPT_ACTIVE) {
1674                         log_err(cd, _("Device %s already exists.\n"), name);
1675                         return -EEXIST;
1676                 }
1677         }
1678
1679         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
1680                 return -ENOMEM;
1681
1682         /* provided passphrase, do not retry */
1683         if (passphrase) {
1684                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1685                                            passphrase_size, &cd->hdr, &mk, cd);
1686         } else
1687                 r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
1688
1689         if (r >= 0) {
1690                 keyslot = r;
1691                 if (name)
1692                         r = open_from_hdr_and_mk(cd, mk, name, flags);
1693         }
1694
1695         LUKS_dealloc_masterkey(mk);
1696         free(prompt);
1697
1698         return r < 0  ? r : keyslot;
1699 }
1700
1701 int crypt_activate_by_keyfile(struct crypt_device *cd,
1702         const char *name,
1703         int keyslot,
1704         const char *keyfile,
1705         size_t keyfile_size,
1706         uint32_t flags)
1707 {
1708         crypt_status_info ci;
1709         struct luks_masterkey *mk = NULL;
1710         char *passphrase_read = NULL;
1711         unsigned int passphrase_size_read;
1712         int r;
1713
1714         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1715                 name ?: "", keyslot, keyfile ?: "[none]");
1716
1717         if (!isLUKS(cd->type)) {
1718                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1719                 return -EINVAL;
1720         }
1721
1722         if (name) {
1723                 ci = crypt_status(NULL, name);
1724                 if (ci == CRYPT_INVALID)
1725                         return -EINVAL;
1726                 else if (ci >= CRYPT_ACTIVE) {
1727                         log_err(cd, _("Device %s already exists.\n"), name);
1728                         return -EEXIST;
1729                 }
1730         }
1731
1732         if (!keyfile)
1733                 return -EINVAL;
1734
1735         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1736                       &passphrase_size_read, keyfile, keyfile_size);
1737         if(!passphrase_read)
1738                 r = -EINVAL;
1739         else {
1740                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1741                                            passphrase_size_read, &cd->hdr, &mk, cd);
1742                 safe_free(passphrase_read);
1743         }
1744
1745         if (r >= 0) {
1746                 keyslot = r;
1747                 if (name)
1748                         r = open_from_hdr_and_mk(cd, mk, name, flags);
1749         }
1750
1751         LUKS_dealloc_masterkey(mk);
1752
1753         return r < 0 ? r : keyslot;
1754 }
1755
1756 int crypt_activate_by_volume_key(struct crypt_device *cd,
1757         const char *name,
1758         const char *volume_key,
1759         size_t volume_key_size,
1760         uint32_t flags)
1761 {
1762         crypt_status_info ci;
1763         struct luks_masterkey *mk;
1764         int r;
1765
1766         log_dbg("Activating volume %s by volume key.", name);
1767
1768         /* use key directly, no hash */
1769         if (isPLAIN(cd->type))
1770                 return create_device_helper(cd, name, NULL,
1771                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1772                         cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
1773                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1774
1775         if (!isLUKS(cd->type)) {
1776                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1777                 return -EINVAL;
1778         }
1779
1780         if (name) {
1781                 ci = crypt_status(NULL, name);
1782                 if (ci == CRYPT_INVALID)
1783                         return -EINVAL;
1784                 else if (ci >= CRYPT_ACTIVE) {
1785                         log_err(cd, _("Device %s already exists.\n"), name);
1786                         return -EEXIST;
1787                 }
1788         }
1789
1790         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1791         if (!mk)
1792                 return -ENOMEM;
1793         r = LUKS_verify_master_key(&cd->hdr, mk);
1794
1795         if (r == -EPERM)
1796                 log_err(cd, _("Volume key does not match the volume.\n"));
1797
1798         if (!r && name)
1799                 r = open_from_hdr_and_mk(cd, mk, name, flags);
1800
1801         LUKS_dealloc_masterkey(mk);
1802
1803         return r;
1804 }
1805
1806 int crypt_deactivate(struct crypt_device *cd, const char *name)
1807 {
1808         int r;
1809
1810         if (!name)
1811                 return -EINVAL;
1812
1813         log_dbg("Deactivating volume %s.", name);
1814
1815         if (!cd && dm_init(NULL, 1) < 0)
1816                 return -ENOSYS;
1817
1818         switch (crypt_status(cd, name)) {
1819                 case CRYPT_ACTIVE:
1820                         r = dm_remove_device(name, 0, 0);
1821                         break;
1822                 case CRYPT_BUSY:
1823                         log_err(cd, _("Device %s is busy.\n"), name);
1824                         r = -EBUSY;
1825                         break;
1826                 case CRYPT_INACTIVE:
1827                         log_err(cd, _("Device %s is not active.\n"), name);
1828                         r = -ENODEV;
1829                         break;
1830                 default:
1831                         log_err(cd, _("Invalid device %s.\n"), name);
1832                         r = -EINVAL;
1833         }
1834
1835         if (!cd)
1836                 dm_exit();
1837
1838         return r;
1839 }
1840
1841 // misc helper functions
1842 int crypt_volume_key_get(struct crypt_device *cd,
1843         int keyslot,
1844         char *volume_key,
1845         size_t *volume_key_size,
1846         const char *passphrase,
1847         size_t passphrase_size)
1848 {
1849         struct luks_masterkey *mk;
1850         char *processed_key = NULL;
1851         int r, key_len;
1852
1853         key_len = crypt_get_volume_key_size(cd);
1854         if (key_len > *volume_key_size) {
1855                 log_err(cd, _("Volume key buffer too small.\n"));
1856                 return -ENOMEM;
1857         }
1858
1859         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
1860                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
1861                                             passphrase, passphrase_size);
1862                 if (!processed_key) {
1863                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
1864                         return -EINVAL;
1865                 }
1866                 memcpy(volume_key, processed_key, key_len);
1867                 *volume_key_size = key_len;
1868                 safe_free(processed_key);
1869                 return 0;
1870         }
1871
1872         if (isLUKS(cd->type)) {
1873                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1874                                         passphrase_size, &cd->hdr, &mk, cd);
1875
1876                 if (r >= 0) {
1877                         memcpy(volume_key, mk->key, mk->keyLength);
1878                         *volume_key_size = mk->keyLength;
1879                 }
1880
1881                 LUKS_dealloc_masterkey(mk);
1882                 return r;
1883         }
1884
1885         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
1886         return -EINVAL;
1887 }
1888
1889 int crypt_volume_key_verify(struct crypt_device *cd,
1890         const char *volume_key,
1891         size_t volume_key_size)
1892 {
1893         struct luks_masterkey *mk;
1894         int r;
1895
1896         if (!isLUKS(cd->type)) {
1897                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1898                 return -EINVAL;
1899         }
1900
1901         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1902         if (!mk)
1903                 return -ENOMEM;
1904
1905         r = LUKS_verify_master_key(&cd->hdr, mk);
1906
1907         if (r == -EPERM)
1908                 log_err(cd, _("Volume key does not match the volume.\n"));
1909
1910         LUKS_dealloc_masterkey(mk);
1911
1912         return r;
1913 }
1914
1915 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
1916 {
1917         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
1918         cd->timeout = timeout_sec;
1919 }
1920
1921 void crypt_set_password_retry(struct crypt_device *cd, int tries)
1922 {
1923         log_dbg("Password retry count set to %d.", tries);
1924         cd->tries = tries;
1925 }
1926
1927 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
1928 {
1929         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
1930         cd->iteration_time = iteration_time_ms;
1931 }
1932
1933 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
1934 {
1935         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
1936         cd->password_verify = password_verify ? 1 : 0;
1937 }
1938
1939 int crypt_memory_lock(struct crypt_device *cd, int lock)
1940 {
1941         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
1942 }
1943
1944 // reporting
1945 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
1946 {
1947         int r;
1948
1949         if (!cd && dm_init(NULL, 1) < 0)
1950                 return CRYPT_INVALID;
1951
1952         r = dm_status_device(name);
1953
1954         if (!cd)
1955                 dm_exit();
1956
1957         if (r < 0 && r != -ENODEV)
1958                 return CRYPT_INVALID;
1959
1960         if (r == 0)
1961                 return CRYPT_ACTIVE;
1962
1963         if (r > 0)
1964                 return CRYPT_BUSY;
1965
1966         return CRYPT_INACTIVE;
1967 }
1968
1969 static void hexprintICB(struct crypt_device *cd, char *d, int n)
1970 {
1971         int i;
1972         for(i = 0; i < n; i++)
1973                 log_std(cd, "%02hhx ", (char)d[i]);
1974 }
1975
1976 int crypt_dump(struct crypt_device *cd)
1977 {
1978         int i;
1979         if (!isLUKS(cd->type)) { //FIXME
1980                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1981                 return -EINVAL;
1982         }
1983
1984         log_std(cd, "LUKS header information for %s\n\n", cd->device);
1985         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
1986         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
1987         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
1988         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
1989         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
1990         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
1991         log_std(cd, "MK digest:     \t");
1992         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
1993         log_std(cd, "\n");
1994         log_std(cd, "MK salt:       \t");
1995         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
1996         log_std(cd, "\n               \t");
1997         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1998         log_std(cd, "\n");
1999         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2000         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2001         for(i = 0; i < LUKS_NUMKEYS; i++) {
2002                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2003                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2004                         log_std(cd, "\tIterations:         \t%d\n",
2005                                 cd->hdr.keyblock[i].passwordIterations);
2006                         log_std(cd, "\tSalt:               \t");
2007                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2008                                     LUKS_SALTSIZE/2);
2009                         log_std(cd, "\n\t                      \t");
2010                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2011                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2012                         log_std(cd, "\n");
2013
2014                         log_std(cd, "\tKey material offset:\t%d\n",
2015                                 cd->hdr.keyblock[i].keyMaterialOffset);
2016                         log_std(cd, "\tAF stripes:            \t%d\n",
2017                                 cd->hdr.keyblock[i].stripes);
2018                 }
2019                 else
2020                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2021         }
2022         return 0;
2023 }
2024
2025 const char *crypt_get_cipher(struct crypt_device *cd)
2026 {
2027         if (isPLAIN(cd->type))
2028                 return cd->plain_cipher;
2029
2030         if (isLUKS(cd->type))
2031                 return cd->hdr.cipherName;
2032
2033         return NULL;
2034 }
2035
2036 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2037 {
2038         if (isPLAIN(cd->type))
2039                 return cd->plain_cipher_mode;
2040
2041         if (isLUKS(cd->type))
2042                 return cd->hdr.cipherMode;
2043
2044         return NULL;
2045 }
2046
2047 const char *crypt_get_uuid(struct crypt_device *cd)
2048 {
2049         if (isLUKS(cd->type))
2050                 return cd->hdr.uuid;
2051
2052         return NULL;
2053 }
2054
2055 int crypt_get_volume_key_size(struct crypt_device *cd)
2056 {
2057         if (isPLAIN(cd->type))
2058                 return cd->volume_key->keyLength;
2059
2060         if (isLUKS(cd->type))
2061                 return cd->hdr.keyBytes;
2062
2063         return 0;
2064 }
2065
2066 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2067 {
2068         if (isPLAIN(cd->type))
2069                 return cd->plain_hdr.offset;
2070
2071         if (isLUKS(cd->type))
2072                 return cd->hdr.payloadOffset;
2073
2074         return 0;
2075 }
2076
2077 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2078 {
2079         if (!isLUKS(cd->type)) {
2080                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2081                 return CRYPT_SLOT_INVALID;
2082         }
2083
2084         return LUKS_keyslot_info(&cd->hdr, keyslot);
2085 }