contrib/cryptsetup/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         ci = crypt_status(cd, name);
 359         if (ci == CRYPT_INVALID)
 360                 return -EINVAL;
 361
 362         if (reload && ci < CRYPT_ACTIVE)
 363                 return -EINVAL;
 364
 365         if (!reload && ci >= CRYPT_ACTIVE) {
 366                 log_err(cd, _("Device %s already exists.\n"), name);
 367                 return -EEXIST;
 368         }
 369
 370         if (key_size < 0 || key_size > 1024) {
 371                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 372                 return -EINVAL;
 373         }
 374
 375         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 376         if (r)
 377                 return r;
 378
 379         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 380                 return -ENOMEM;
 381
 382         processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
 383         if (!processed_key)
 384                 return -ENOENT;
 385
 386         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 387                              key_size, processed_key, read_only, reload);
 388
 389         free(dm_cipher);
 390         safe_free(processed_key);
 391         return r;
 392 }
 393
 394 static int open_from_hdr_and_mk(struct crypt_device *cd,
 395                                 struct luks_masterkey *mk,
 396                                 const char *name,
 397                                 uint32_t flags)
 398 {
 399         uint64_t size, offset;
 400         char *cipher;
 401         int read_only, no_uuid, r;
 402
 403         size = 0;
 404         offset = crypt_get_data_offset(cd);
 405         read_only = flags & CRYPT_ACTIVATE_READONLY;
 406         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 407
 408         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 409         if (r)
 410                 return r;
 411
 412         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 413                      crypt_get_cipher_mode(cd)) < 0)
 414                 r = -ENOMEM;
 415         else
 416                 r = dm_create_device(name, cd->device, cipher, cd->type,
 417                                      no_uuid ? NULL : crypt_get_uuid(cd),
 418                                      size, 0, offset, mk->keyLength, mk->key,
 419                                      read_only, 0);
 420         free(cipher);
 421         return r;
 422 }
 423
 424 static void log_wrapper(int level, const char *msg, void *usrptr)
 425 {
 426         void (*xlog)(int level, char *msg) = usrptr;
 427         xlog(level, (char *)msg);
 428 }
 429
 430 static int yesDialog_wrapper(const char *msg, void *usrptr)
 431 {
 432         int (*xyesDialog)(char *msg) = usrptr;
 433         return xyesDialog((char*)msg);
 434 }
 435
 436 int crypt_confirm(struct crypt_device *cd, const char *msg)
 437 {
 438         if (!cd || !cd->confirm)
 439                 return 1;
 440         else
 441                 return cd->confirm(msg, cd->confirm_usrptr);
 442 }
 443
 444 static void key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 445                               unsigned int *key_len, int force_verify)
 446 {
 447         int r, flags = 0;
 448
 449         if (cd->password) {
 450                 *key = safe_alloc(MAX_TTY_PASSWORD_LEN);
 451                 if (*key)
 452                         return;
 453                 r = cd->password(msg, *key, (size_t)key_len, cd->password_usrptr);
 454                 if (r < 0) {
 455                         safe_free(*key);
 456                         *key = NULL;
 457                 } else
 458                         *key_len = r;
 459         } else {
 460                 if (force_verify || cd->password_verify)
 461                         flags |= CRYPT_FLAG_VERIFY_IF_POSSIBLE;
 462                 get_key(msg, key, key_len, 0, NULL, cd->timeout, flags, cd);
 463         }
 464 }
 465
 466 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 467                                              struct luks_masterkey **mk)
 468 {
 469         char *prompt = NULL, *passphrase_read = NULL;
 470         unsigned int passphrase_size_read;
 471         int r = -EINVAL, tries = cd->tries;
 472
 473         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
 474                 return -ENOMEM;
 475
 476         *mk = NULL;
 477         do {
 478                 if (*mk)
 479                         LUKS_dealloc_masterkey(*mk);
 480                 *mk = NULL;
 481
 482                 key_from_terminal(cd, prompt, &passphrase_read,
 483                                   &passphrase_size_read, 0);
 484                 if(!passphrase_read) {
 485                         r = -EINVAL;
 486                         break;
 487                 }
 488
 489                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 490                                            passphrase_size_read, &cd->hdr, mk, cd);
 491                 safe_free(passphrase_read);
 492                 passphrase_read = NULL;
 493         } while (r == -EPERM && (--tries > 0));
 494
 495         if (r < 0 && *mk) {
 496                 LUKS_dealloc_masterkey(*mk);
 497                 *mk = NULL;
 498         }
 499         free(prompt);
 500
 501         return r;
 502
 503 }
 504
 505 static void key_from_file(struct crypt_device *cd, char *msg,
 506                           char **key, unsigned int *key_len,
 507                           const char *key_file, size_t key_size)
 508 {
 509         get_key(msg, key, key_len, key_size, key_file, cd->timeout, 0, cd);
 510 }
 511
 512 static int _crypt_init(struct crypt_device **cd,
 513                        const char *type,
 514                        struct crypt_options *options,
 515                        int load, int need_dm)
 516 {
 517         int init_by_name, r;
 518
 519         /* if it is plain device and mapping table is being reloaded
 520         initialize it by name*/
 521         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 522
 523         /* Some of old API calls do not require DM in kernel,
 524            fake initialisation by initialise it with kernel_check disabled */
 525         if (!need_dm)
 526                 (void)dm_init(NULL, 0);
 527         if (init_by_name)
 528                 r = crypt_init_by_name(cd, options->name);
 529         else
 530                 r = crypt_init(cd, options->device);
 531         if (!need_dm)
 532                 dm_exit();
 533
 534         if (r)
 535                 return -EINVAL;
 536
 537         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 538         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 539
 540         crypt_set_timeout(*cd, options->timeout);
 541         crypt_set_password_retry(*cd, options->tries);
 542         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 543         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 544
 545         if (load && !init_by_name)
 546                 r = crypt_load(*cd, type, NULL);
 547
 548         if (!r && type && !(*cd)->type) {
 549                 (*cd)->type = strdup(type);
 550                 if (!(*cd)->type)
 551                         r = -ENOMEM;
 552         }
 553
 554         if (r)
 555                 crypt_free(*cd);
 556
 557         return r;
 558 }
 559
 560 void crypt_set_log_callback(struct crypt_device *cd,
 561         void (*log)(int level, const char *msg, void *usrptr),
 562         void *usrptr)
 563 {
 564         if (!cd)
 565                 _default_log = log;
 566         else {
 567                 cd->log = log;
 568                 cd->log_usrptr = usrptr;
 569         }
 570 }
 571
 572 void crypt_set_confirm_callback(struct crypt_device *cd,
 573         int (*confirm)(const char *msg, void *usrptr),
 574         void *usrptr)
 575 {
 576         cd->confirm = confirm;
 577         cd->confirm_usrptr = usrptr;
 578 }
 579
 580 void crypt_set_password_callback(struct crypt_device *cd,
 581         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 582         void *usrptr)
 583 {
 584         cd->password = password;
 585         cd->password_usrptr = usrptr;
 586 }
 587
 588 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 589  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 590  *          flags, icb */
 591 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 592 {
 593         struct crypt_device *cd = NULL;
 594         char *key = NULL;
 595         unsigned int keyLen;
 596         int r;
 597
 598         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 599         if (r)
 600                 return r;
 601
 602         get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 603                 options->key_file, cd->timeout, options->flags, cd);
 604         if (!key)
 605                 r = -ENOENT;
 606         else
 607                 r = create_device_helper(cd, options->name, options->hash,
 608                         options->cipher, NULL, options->key_file, key, keyLen,
 609                         options->key_size, options->size, options->skip,
 610                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 611                         options->flags, update);
 612
 613         safe_free(key);
 614         crypt_free(cd);
 615         return r;
 616 }
 617
 618 int crypt_create_device(struct crypt_options *options)
 619 {
 620         return crypt_create_and_update_device(options, 0);
 621 }
 622
 623 int crypt_update_device(struct crypt_options *options)
 624 {
 625         return crypt_create_and_update_device(options, 1);
 626 }
 627
 628 /* OPTIONS: name, size, icb */
 629 int crypt_resize_device(struct crypt_options *options)
 630 {
 631         struct crypt_device *cd = NULL;
 632         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 633         char *type = NULL;
 634         uint64_t size, skip, offset;
 635         int key_size, read_only, r;
 636
 637         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 638
 639         if (dm_init(NULL, 1) < 0)
 640                 return -ENOSYS;
 641
 642         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 643                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 644         if (r < 0) {
 645                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 646                 goto out;
 647         }
 648
 649         /* Try to determine type of device from UUID */
 650         type = CRYPT_PLAIN;
 651         if (uuid) {
 652                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 653                         type = CRYPT_PLAIN;
 654                         free (uuid);
 655                         uuid = NULL;
 656                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 657                         type = CRYPT_LUKS1;
 658         }
 659
 660         if (!options->device)
 661                 options->device = device;
 662
 663         r = _crypt_init(&cd, type, options, 1, 1);
 664         if (r)
 665                 goto out;
 666
 667         size = options->size;
 668         r = device_check_and_adjust(cd, device, &size, &offset, &read_only);
 669         if (r)
 670                 goto out;
 671
 672         r = dm_create_device(options->name, device, cipher, type,
 673                              crypt_get_uuid(cd), size, skip, offset,
 674                              key_size, key, read_only, 1);
 675 out:
 676         safe_free(key);
 677         free(cipher);
 678         if (options->device == device)
 679                 options->device = NULL;
 680         free(device);
 681         free(uuid);
 682         crypt_free(cd);
 683         dm_exit();
 684         return r;
 685 }
 686
 687 /* OPTIONS: name, icb */
 688 int crypt_query_device(struct crypt_options *options)
 689 {
 690         int read_only, r;
 691
 692         log_dbg("Query device %s.", options->name);
 693
 694         if (dm_init(NULL, 1) < 0)
 695                 return -ENOSYS;
 696
 697         r = dm_status_device(options->name);
 698         if (r == -ENODEV) {
 699                 dm_exit();
 700                 return 0;
 701         }
 702
 703         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 704                             &options->skip, &options->offset, (char **)&options->cipher,
 705                             &options->key_size, NULL, &read_only, NULL, NULL);
 706
 707         dm_exit();
 708         if (r < 0)
 709                 return r;
 710
 711         if (read_only)
 712                 options->flags |= CRYPT_FLAG_READONLY;
 713
 714         options->flags |= CRYPT_FLAG_FREE_DEVICE;
 715         options->flags |= CRYPT_FLAG_FREE_CIPHER;
 716
 717         return 1;
 718 }
 719
 720 /* OPTIONS: name, icb */
 721 int crypt_remove_device(struct crypt_options *options)
 722 {
 723         struct crypt_device *cd = NULL;
 724         int r;
 725
 726         r = crypt_init_by_name(&cd, options->name);
 727         if (r == 0)
 728                 r = crypt_deactivate(cd, options->name);
 729
 730         crypt_free(cd);
 731         return r;
 732
 733 }
 734
 735 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 736  *          new_key_file, iteration_time, timeout, flags, icb */
 737 int crypt_luksFormat(struct crypt_options *options)
 738 {
 739         char cipherName[LUKS_CIPHERNAME_L];
 740         char cipherMode[LUKS_CIPHERMODE_L];
 741         char *password=NULL;
 742         unsigned int passwordLen;
 743         struct crypt_device *cd = NULL;
 744         struct crypt_params_luks1 cp = {
 745                 .hash = options->hash,
 746                 .data_alignment = options->align_payload
 747         };
 748         int r;
 749
 750         r = parse_into_name_and_mode(options->cipher, cipherName, cipherMode);
 751         if(r < 0) {
 752                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 753                 return r;
 754         }
 755
 756         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 757                 return r;
 758
 759         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 760                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 761                         options->key_slot, LUKS_NUMKEYS - 1);
 762                 r = -EINVAL;
 763                 goto out;
 764         }
 765
 766         get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 767                 options->new_key_file, options->timeout, options->flags, cd);
 768
 769         if(!password) {
 770                 r = -EINVAL;
 771                 goto out;
 772         }
 773
 774         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 775                          NULL, NULL, options->key_size, &cp);
 776         if (r < 0)
 777                 goto out;
 778
 779         /* Add keyslot using internally stored volume key generated during format */
 780         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 781                                             password, passwordLen);
 782 out:
 783         crypt_free(cd);
 784         safe_free(password);
 785         return (r < 0) ? r : 0;
 786 }
 787
 788 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 789 int crypt_luksOpen(struct crypt_options *options)
 790 {
 791         struct crypt_device *cd = NULL;
 792         uint32_t flags = 0;
 793         int r;
 794
 795         if (!options->name)
 796                 return -EINVAL;
 797
 798         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 799         if (r)
 800                 return r;
 801
 802         if (options->flags & CRYPT_FLAG_READONLY)
 803                 flags |= CRYPT_ACTIVATE_READONLY;
 804
 805         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 806                 flags |= CRYPT_ACTIVATE_NO_UUID;
 807
 808         if (options->key_file)
 809                 r = crypt_activate_by_keyfile(cd, options->name,
 810                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 811                         flags);
 812         else
 813                 r = crypt_activate_by_passphrase(cd, options->name,
 814                         CRYPT_ANY_SLOT, options->passphrase,
 815                         options->passphrase ? strlen(options->passphrase) : 0,
 816                         flags);
 817
 818         crypt_free(cd);
 819         return (r < 0) ? r : 0;
 820 }
 821
 822 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 823 int crypt_luksKillSlot(struct crypt_options *options)
 824 {
 825         struct crypt_device *cd = NULL;
 826         int r;
 827
 828         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 829         if (r)
 830                 return r;
 831
 832         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 833                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 834
 835         crypt_free(cd);
 836         return (r < 0) ? r : 0;
 837 }
 838
 839 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 840 int crypt_luksRemoveKey(struct crypt_options *options)
 841 {
 842         struct crypt_device *cd = NULL;
 843         int r;
 844
 845         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 846         if (r)
 847                 return r;
 848
 849         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 850                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 851
 852         crypt_free(cd);
 853         return (r < 0) ? r : 0;
 854 }
 855
 856
 857 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 858             iteration_time, timeout, icb */
 859 int crypt_luksAddKey(struct crypt_options *options)
 860 {
 861         struct crypt_device *cd = NULL;
 862         int r = -EINVAL;
 863
 864         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 865         if (r)
 866                 return r;
 867
 868         if (options->key_file || options->new_key_file)
 869                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 870                                                  options->key_file, 0,
 871                                                  options->new_key_file, 0);
 872         else
 873                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 874                                                     NULL, 0, NULL, 0);
 875
 876         crypt_free(cd);
 877         return (r < 0) ? r : 0;
 878 }
 879
 880 /* OPTIONS: device, icb */
 881 int crypt_luksUUID(struct crypt_options *options)
 882 {
 883         struct crypt_device *cd = NULL;
 884         char *uuid;
 885         int r;
 886
 887         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 888         if (r)
 889                 return r;
 890
 891         uuid = (char *)crypt_get_uuid(cd);
 892         log_std(cd, uuid ?: "");
 893         log_std(cd, "\n");
 894         crypt_free(cd);
 895         return 0;
 896 }
 897
 898 /* OPTIONS: device, icb */
 899 int crypt_isLuks(struct crypt_options *options)
 900 {
 901         struct crypt_device *cd = NULL;
 902         int r;
 903
 904         log_dbg("Check device %s for LUKS header.", options->device);
 905
 906         if (init_crypto()) {
 907                 log_err(cd, _("Cannot initialize crypto backend.\n"));
 908                 return -ENOSYS;
 909         }
 910
 911         r = crypt_init(&cd, options->device);
 912         if (r < 0)
 913                 return -EINVAL;
 914
 915         /* Do print fail here, no need to crypt_load() */
 916         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 917
 918         crypt_free(cd);
 919         return r;
 920 }
 921
 922 /* OPTIONS: device, icb */
 923 int crypt_luksDump(struct crypt_options *options)
 924 {
 925         struct crypt_device *cd = NULL;
 926         int r;
 927
 928         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 929         if(r < 0)
 930                 return r;
 931
 932         r = crypt_dump(cd);
 933
 934         crypt_free(cd);
 935         return 0;
 936 }
 937
 938 void crypt_get_error(char *buf, size_t size)
 939 {
 940         const char *error = get_error();
 941
 942         if (!buf || size < 1)
 943                 set_error(NULL);
 944         else if (error) {
 945                 strncpy(buf, error, size - 1);
 946                 buf[size - 1] = '\0';
 947                 set_error(NULL);
 948         } else
 949                 buf[0] = '\0';
 950 }
 951
 952 void crypt_put_options(struct crypt_options *options)
 953 {
 954         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 955                 free((char *)options->device);
 956                 options->device = NULL;
 957                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 958         }
 959         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 960                 free((char *)options->cipher);
 961                 options->cipher = NULL;
 962                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 963         }
 964 }
 965
 966 const char *crypt_get_dir(void)
 967 {
 968         return dm_get_dir();
 969 }
 970
 971 /////////////////////////////////
 972 //
 973 // New API
 974 //
 975
 976 int crypt_init(struct crypt_device **cd, const char *device)
 977 {
 978         struct crypt_device *h = NULL;
 979
 980         if (!cd)
 981                 return -EINVAL;
 982
 983         log_dbg("Allocating crypt device %s context.", device);
 984
 985         if (device && !device_ready(NULL, device, O_RDONLY))
 986                 return -ENOTBLK;
 987
 988         if (!(h = malloc(sizeof(struct crypt_device))))
 989                 return -ENOMEM;
 990
 991         memset(h, 0, sizeof(*h));
 992
 993         if (device) {
 994                 h->device = strdup(device);
 995                 if (!h->device) {
 996                         free(h);
 997                         return -ENOMEM;
 998                 }
 999         } else
1000                 h->device = NULL;
1001
1002         if (dm_init(h, 1) < 0) {
1003                 free(h);
1004                 return -ENOSYS;
1005         }
1006
1007         h->iteration_time = 1000;
1008         h->password_verify = 0;
1009         h->tries = 3;
1010         *cd = h;
1011         return 0;
1012 }
1013
1014 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1015 {
1016         crypt_status_info ci;
1017         char *device = NULL;
1018         int r;
1019
1020         log_dbg("Allocating crypt device context by device %s.", name);
1021
1022         ci = crypt_status(NULL, name);
1023         if (ci == CRYPT_INVALID)
1024                 return -ENODEV;
1025
1026         if (ci < CRYPT_ACTIVE) {
1027                 log_err(NULL, _("Device %s is not active.\n"), name);
1028                 return -ENODEV;
1029         }
1030
1031         r = dm_query_device(name, &device, NULL, NULL, NULL,
1032                             NULL, NULL, NULL, NULL, NULL, NULL);
1033
1034         /* Underlying device disappeared but mapping still active */
1035         if (r >= 0 && !device)
1036                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1037                             name);
1038
1039         if (r >= 0)
1040                 r = crypt_init(cd, device);
1041
1042         free(device);
1043         return r;
1044 }
1045
1046 static int _crypt_format_plain(struct crypt_device *cd,
1047                                const char *cipher,
1048                                const char *cipher_mode,
1049                                const char *uuid,
1050                                struct crypt_params_plain *params)
1051 {
1052         if (!cipher || !cipher_mode) {
1053                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1054                 return -EINVAL;
1055         }
1056
1057         if (cd->volume_key->keyLength > 1024) {
1058                 log_err(cd, _("Invalid key size.\n"));
1059                 return -EINVAL;
1060         }
1061
1062         cd->plain_cipher = strdup(cipher);
1063         cd->plain_cipher_mode = strdup(cipher_mode);
1064
1065         if (uuid)
1066                 cd->plain_uuid = strdup(uuid);
1067
1068         if (params && params->hash)
1069                 cd->plain_hdr.hash = strdup(params->hash);
1070
1071         cd->plain_hdr.offset = params ? params->offset : 0;
1072         cd->plain_hdr.skip = params ? params->skip : 0;
1073
1074         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1075                 return -ENOMEM;
1076
1077         return 0;
1078 }
1079
1080 static int _crypt_format_luks1(struct crypt_device *cd,
1081                                const char *cipher,
1082                                const char *cipher_mode,
1083                                const char *uuid,
1084                                struct crypt_params_luks1 *params)
1085 {
1086         int r;
1087         unsigned long required_alignment = DEFAULT_ALIGNMENT;
1088         unsigned long alignment_offset = 0;
1089
1090         if (!cd->device) {
1091                 log_err(cd, _("Can't format LUKS without device.\n"));
1092                 return -EINVAL;
1093         }
1094
1095         if (params && params->data_alignment)
1096                 required_alignment = params->data_alignment * SECTOR_SIZE;
1097         else
1098                 get_topology_alignment(cd->device, &required_alignment,
1099                                        &alignment_offset, DEFAULT_ALIGNMENT);
1100
1101         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1102                                (params && params->hash) ? params->hash : "sha1",
1103                                uuid, LUKS_STRIPES,
1104                                required_alignment / SECTOR_SIZE,
1105                                alignment_offset / SECTOR_SIZE,
1106                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1107         if(r < 0)
1108                 return r;
1109
1110         /* Wipe first 8 sectors - fs magic numbers etc. */
1111         r = wipe_device_header(cd->device, 8);
1112         if(r < 0) {
1113                 log_err(cd, _("Can't wipe header on device %s.\n"), cd->device);
1114                 return r;
1115         }
1116
1117         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1118
1119         return r;
1120 }
1121
1122 int crypt_format(struct crypt_device *cd,
1123         const char *type,
1124         const char *cipher,
1125         const char *cipher_mode,
1126         const char *uuid,
1127         const char *volume_key,
1128         size_t volume_key_size,
1129         void *params)
1130 {
1131         int r;
1132
1133         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)");
1134
1135         if (!type)
1136                 return -EINVAL;
1137
1138         /* Some hash functions need initialized gcrypt library */
1139         if (init_crypto()) {
1140                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1141                 return -ENOSYS;
1142         }
1143
1144         if (volume_key)
1145                 cd->volume_key = LUKS_alloc_masterkey(volume_key_size,
1146                                                       volume_key);
1147         else
1148                 cd->volume_key = LUKS_generate_masterkey(volume_key_size);
1149
1150         if(!cd->volume_key)
1151                 return -ENOMEM;
1152
1153         if (isPLAIN(type))
1154                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1155                                         uuid, params);
1156         else if (isLUKS(type))
1157                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1158                                         uuid, params);
1159         else {
1160                 /* FIXME: allow plugins here? */
1161                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1162                 r = -EINVAL;
1163         }
1164
1165         if (!r && !(cd->type = strdup(type)))
1166                 r = -ENOMEM;
1167
1168         if (r < 0) {
1169                 LUKS_dealloc_masterkey(cd->volume_key);
1170                 cd->volume_key = NULL;
1171         }
1172
1173         return r;
1174 }
1175
1176 int crypt_load(struct crypt_device *cd,
1177                const char *requested_type,
1178                void *params)
1179 {
1180         struct luks_phdr hdr;
1181         int r;
1182
1183         log_dbg("Trying to load %s crypt type from device %s.",
1184                 requested_type ?: "any", cd->device ?: "(none)");
1185
1186         if (!cd->device)
1187                 return -EINVAL;
1188
1189         if (requested_type && !isLUKS(requested_type))
1190                 return -EINVAL;
1191
1192         /* Some hash functions need initialized gcrypt library */
1193         if (init_crypto()) {
1194                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1195                 return -ENOSYS;
1196         }
1197
1198         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1199
1200         if (!r) {
1201                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1202                 cd->type = strdup(requested_type);
1203                 if (!cd->type)
1204                         r = -ENOMEM;
1205         }
1206
1207         return r;
1208 }
1209
1210 int crypt_header_backup(struct crypt_device *cd,
1211                         const char *requested_type,
1212                         const char *backup_file)
1213 {
1214         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1215                 return -EINVAL;
1216
1217         /* Some hash functions need initialized gcrypt library */
1218         if (init_crypto()) {
1219                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1220                 return -ENOSYS;
1221         }
1222
1223         log_dbg("Requested header backup of device %s (%s) to "
1224                 "file %s.", cd->device, requested_type, backup_file);
1225
1226         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1227 }
1228
1229 int crypt_header_restore(struct crypt_device *cd,
1230                          const char *requested_type,
1231                          const char *backup_file)
1232 {
1233         if (requested_type && !isLUKS(requested_type))
1234                 return -EINVAL;
1235
1236         /* Some hash functions need initialized gcrypt library */
1237         if (init_crypto()) {
1238                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1239                 return -ENOSYS;
1240         }
1241
1242         log_dbg("Requested header restore to device %s (%s) from "
1243                 "file %s.", cd->device, requested_type, backup_file);
1244
1245         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1246 }
1247
1248 void crypt_free(struct crypt_device *cd)
1249 {
1250         if (cd) {
1251                 log_dbg("Releasing crypt device %s context.", cd->device);
1252
1253                 dm_exit();
1254                 if (cd->volume_key)
1255                         LUKS_dealloc_masterkey(cd->volume_key);
1256
1257                 free(cd->device);
1258                 free(cd->type);
1259
1260                 /* used in plain device only */
1261                 free((char*)cd->plain_hdr.hash);
1262                 free(cd->plain_cipher);
1263                 free(cd->plain_cipher_mode);
1264                 free(cd->plain_uuid);
1265
1266                 free(cd);
1267         }
1268 }
1269
1270 int crypt_suspend(struct crypt_device *cd,
1271                   const char *name)
1272 {
1273         crypt_status_info ci;
1274         int r, suspended = 0;
1275
1276         log_dbg("Suspending volume %s.", name);
1277
1278         ci = crypt_status(NULL, name);
1279         if (ci < CRYPT_ACTIVE) {
1280                 log_err(cd, _("Volume %s is not active.\n"), name);
1281                 return -EINVAL;
1282         }
1283
1284         if (!cd && dm_init(NULL, 1) < 0)
1285                 return -ENOSYS;
1286
1287         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1288                             NULL, NULL, NULL, NULL, &suspended, NULL);
1289         if (r < 0)
1290                 goto out;
1291
1292         if (suspended) {
1293                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1294                 r = -EINVAL;
1295                 goto out;
1296         }
1297
1298         r = dm_suspend_and_wipe_key(name);
1299         if (r == -ENOTSUP)
1300                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1301         else if (r)
1302                 log_err(cd, "Error during suspending device %s.\n", name);
1303 out:
1304         if (!cd)
1305                 dm_exit();
1306         return r;
1307 }
1308
1309 int crypt_resume_by_passphrase(struct crypt_device *cd,
1310                                const char *name,
1311                                int keyslot,
1312                                const char *passphrase,
1313                                size_t passphrase_size)
1314 {
1315         struct luks_masterkey *mk = NULL;
1316         int r, suspended = 0;
1317
1318         log_dbg("Resuming volume %s.", name);
1319
1320         if (!isLUKS(cd->type)) {
1321                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1322                 r = -EINVAL;
1323                 goto out;
1324         }
1325
1326         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1327                             NULL, NULL, NULL, NULL, &suspended, NULL);
1328         if (r < 0)
1329                 return r;
1330
1331         if (!suspended) {
1332                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1333                 return -EINVAL;
1334         }
1335
1336         if (passphrase) {
1337                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1338                                            passphrase_size, &cd->hdr, &mk, cd);
1339         } else
1340                 r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
1341
1342         if (r >= 0) {
1343                 keyslot = r;
1344                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1345                 if (r == -ENOTSUP)
1346                         log_err(cd, "Resume is not supported for device %s.\n", name);
1347                 else if (r)
1348                         log_err(cd, "Error during resuming device %s.\n", name);
1349         } else
1350                 r = keyslot;
1351 out:
1352         LUKS_dealloc_masterkey(mk);
1353         return r < 0 ? r : keyslot;
1354 }
1355
1356 int crypt_resume_by_keyfile(struct crypt_device *cd,
1357                             const char *name,
1358                             int keyslot,
1359                             const char *keyfile,
1360                             size_t keyfile_size)
1361 {
1362         struct luks_masterkey *mk = NULL;
1363         char *passphrase_read = NULL;
1364         unsigned int passphrase_size_read;
1365         int r, suspended = 0;
1366
1367         log_dbg("Resuming volume %s.", name);
1368
1369         if (!isLUKS(cd->type)) {
1370                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1371                 r = -EINVAL;
1372                 goto out;
1373         }
1374
1375         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1376                             NULL, NULL, NULL, NULL, &suspended, NULL);
1377         if (r < 0)
1378                 return r;
1379
1380         if (!suspended) {
1381                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1382                 return -EINVAL;
1383         }
1384
1385         if (!keyfile)
1386                 return -EINVAL;
1387
1388         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1389                       &passphrase_size_read, keyfile, keyfile_size);
1390
1391         if(!passphrase_read)
1392                 r = -EINVAL;
1393         else {
1394                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1395                                            passphrase_size_read, &cd->hdr, &mk, cd);
1396                 safe_free(passphrase_read);
1397         }
1398
1399         if (r >= 0) {
1400                 keyslot = r;
1401                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1402                 if (r)
1403                         log_err(cd, "Error during resuming device %s.\n", name);
1404         } else
1405                 r = keyslot;
1406 out:
1407         LUKS_dealloc_masterkey(mk);
1408         return r < 0 ? r : keyslot;
1409 }
1410
1411 // slot manipulation
1412 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1413         int keyslot, // -1 any
1414         const char *passphrase, // NULL -> terminal
1415         size_t passphrase_size,
1416         const char *new_passphrase, // NULL -> terminal
1417         size_t new_passphrase_size)
1418 {
1419         struct luks_masterkey *mk = NULL;
1420         char *password = NULL, *new_password = NULL;
1421         unsigned int passwordLen, new_passwordLen;
1422         int r;
1423
1424         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1425                 "new passphrase %sprovided.",
1426                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1427
1428         if (!isLUKS(cd->type)) {
1429                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1430                 return -EINVAL;
1431         }
1432
1433         r = keyslot_verify_or_find_empty(cd, &keyslot);
1434         if (r)
1435                 return r;
1436
1437         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1438                 /* No slots used, try to use pre-generated key in header */
1439                 if (cd->volume_key) {
1440                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1441                         r = mk ? 0 : -ENOMEM;
1442                 } else {
1443                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1444                         return -EINVAL;
1445                 }
1446         } else if (passphrase) {
1447                 /* Passphrase provided, use it to unlock existing keyslot */
1448                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1449                                            passphrase_size, &cd->hdr, &mk, cd);
1450         } else {
1451                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1452                 key_from_terminal(cd, _("Enter any passphrase: "),
1453                                   &password, &passwordLen, 0);
1454                 if (!password) {
1455                         r = -EINVAL;
1456                         goto out;
1457                 }
1458
1459                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1460                                            passwordLen, &cd->hdr, &mk, cd);
1461                 safe_free(password);
1462         }
1463
1464         if(r < 0)
1465                 goto out;
1466
1467         if (new_passphrase) {
1468                 new_password = (char *)new_passphrase;
1469                 new_passwordLen = new_passphrase_size;
1470         } else {
1471                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1472                                   &new_password, &new_passwordLen, 1);
1473                 if(!new_password) {
1474                         r = -EINVAL;
1475                         goto out;
1476                 }
1477         }
1478
1479         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1480                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1481         if(r < 0) goto out;
1482
1483         r = 0;
1484 out:
1485         if (!new_passphrase)
1486                 safe_free(new_password);
1487         LUKS_dealloc_masterkey(mk);
1488         return r ?: keyslot;
1489 }
1490
1491 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1492         int keyslot,
1493         const char *keyfile,
1494         size_t keyfile_size,
1495         const char *new_keyfile,
1496         size_t new_keyfile_size)
1497 {
1498         struct luks_masterkey *mk=NULL;
1499         char *password=NULL; unsigned int passwordLen;
1500         char *new_password = NULL; unsigned int new_passwordLen;
1501         int r;
1502
1503         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1504                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1505
1506         if (!isLUKS(cd->type)) {
1507                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1508                 return -EINVAL;
1509         }
1510
1511         r = keyslot_verify_or_find_empty(cd, &keyslot);
1512         if (r)
1513                 return r;
1514
1515         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1516                 /* No slots used, try to use pre-generated key in header */
1517                 if (cd->volume_key) {
1518                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1519                         r = mk ? 0 : -ENOMEM;
1520                 } else {
1521                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1522                         return -EINVAL;
1523                 }
1524         } else {
1525                 /* Read password from file of (if NULL) from terminal */
1526                 if (keyfile)
1527                         key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen,
1528                                       keyfile, keyfile_size);
1529                 else
1530                         key_from_terminal(cd, _("Enter any passphrase: "),
1531                                         &password, &passwordLen, 0);
1532
1533                 if (!password)
1534                         return -EINVAL;
1535
1536                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1537                                            &cd->hdr, &mk, cd);
1538                 safe_free(password);
1539         }
1540
1541         if(r < 0)
1542                 goto out;
1543
1544         if (new_keyfile)
1545                 key_from_file(cd, _("Enter new passphrase for key slot: "),
1546                               &new_password, &new_passwordLen, new_keyfile,
1547                               new_keyfile_size);
1548         else
1549                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1550                                   &new_password, &new_passwordLen, 1);
1551
1552         if(!new_password) {
1553                 r = -EINVAL;
1554                 goto out;
1555         }
1556
1557         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1558                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1559 out:
1560         safe_free(new_password);
1561         LUKS_dealloc_masterkey(mk);
1562         return r < 0 ? r : keyslot;
1563 }
1564
1565 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1566         int keyslot,
1567         const char *volume_key,
1568         size_t volume_key_size,
1569         const char *passphrase,
1570         size_t passphrase_size)
1571 {
1572         struct luks_masterkey *mk = NULL;
1573         int r = -EINVAL;
1574         char *new_password = NULL; unsigned int new_passwordLen;
1575
1576         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1577
1578         if (!isLUKS(cd->type)) {
1579                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1580                 return -EINVAL;
1581         }
1582
1583         if (volume_key)
1584                 mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1585         else if (cd->volume_key)
1586                 mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1587
1588         if (!mk)
1589                 return -ENOMEM;
1590
1591         r = LUKS_verify_master_key(&cd->hdr, mk);
1592         if (r < 0) {
1593                 log_err(cd, _("Volume key does not match the volume.\n"));
1594                 goto out;
1595         }
1596
1597         r = keyslot_verify_or_find_empty(cd, &keyslot);
1598         if (r)
1599                 goto out;
1600
1601         if (!passphrase) {
1602                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1603                                   &new_password, &new_passwordLen, 1);
1604                 passphrase = new_password;
1605                 passphrase_size = new_passwordLen;
1606         }
1607
1608         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1609                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1610 out:
1611         if (new_password)
1612                 safe_free(new_password);
1613         LUKS_dealloc_masterkey(mk);
1614         return r ?: keyslot;
1615 }
1616
1617 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1618 {
1619         crypt_keyslot_info ki;
1620
1621         log_dbg("Destroying keyslot %d.", keyslot);
1622
1623         if (!isLUKS(cd->type)) {
1624                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1625                 return -EINVAL;
1626         }
1627
1628         ki = crypt_keyslot_status(cd, keyslot);
1629         if (ki == CRYPT_SLOT_INVALID) {
1630                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1631                 return -EINVAL;
1632         }
1633
1634         if (ki == CRYPT_SLOT_INACTIVE) {
1635                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1636                 return -EINVAL;
1637         }
1638
1639         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1640 }
1641
1642 // activation/deactivation of device mapping
1643 int crypt_activate_by_passphrase(struct crypt_device *cd,
1644         const char *name,
1645         int keyslot,
1646         const char *passphrase,
1647         size_t passphrase_size,
1648         uint32_t flags)
1649 {
1650         crypt_status_info ci;
1651         struct luks_masterkey *mk = NULL;
1652         char *prompt = NULL;
1653         int r;
1654
1655         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1656                 name ? "Activating" : "Checking", name ?: "",
1657                 keyslot, passphrase ? "" : "[none] ");
1658
1659         if (!name)
1660                 return -EINVAL;
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                 r = open_from_hdr_and_mk(cd, mk, name, flags);
1748         }
1749
1750         LUKS_dealloc_masterkey(mk);
1751
1752         return r < 0 ? r : keyslot;
1753 }
1754
1755 int crypt_activate_by_volume_key(struct crypt_device *cd,
1756         const char *name,
1757         const char *volume_key,
1758         size_t volume_key_size,
1759         uint32_t flags)
1760 {
1761         crypt_status_info ci;
1762         struct luks_masterkey *mk;
1763         int r;
1764
1765         log_dbg("Activating volume %s by volume key.", name);
1766
1767         /* use key directly, no hash */
1768         if (isPLAIN(cd->type))
1769                 return create_device_helper(cd, name, NULL,
1770                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1771                         cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
1772                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1773
1774         if (!isLUKS(cd->type)) {
1775                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1776                 return -EINVAL;
1777         }
1778
1779         if (name) {
1780                 ci = crypt_status(NULL, name);
1781                 if (ci == CRYPT_INVALID)
1782                         return -EINVAL;
1783                 else if (ci >= CRYPT_ACTIVE) {
1784                         log_err(cd, _("Device %s already exists.\n"), name);
1785                         return -EEXIST;
1786                 }
1787         }
1788
1789         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1790         if (!mk)
1791                 return -ENOMEM;
1792         r = LUKS_verify_master_key(&cd->hdr, mk);
1793
1794         if (r == -EPERM)
1795                 log_err(cd, _("Volume key does not match the volume.\n"));
1796
1797         if (!r && name)
1798                 r = open_from_hdr_and_mk(cd, mk, name, flags);
1799
1800         LUKS_dealloc_masterkey(mk);
1801
1802         return r;
1803 }
1804
1805 int crypt_deactivate(struct crypt_device *cd, const char *name)
1806 {
1807         int r;
1808
1809         if (!name)
1810                 return -EINVAL;
1811
1812         log_dbg("Deactivating volume %s.", name);
1813
1814         if (!cd && dm_init(NULL, 1) < 0)
1815                 return -ENOSYS;
1816
1817         switch (crypt_status(cd, name)) {
1818                 case CRYPT_ACTIVE:
1819                         r = dm_remove_device(name, 0, 0);
1820                         break;
1821                 case CRYPT_BUSY:
1822                         log_err(cd, _("Device %s is busy.\n"), name);
1823                         r = -EBUSY;
1824                         break;
1825                 case CRYPT_INACTIVE:
1826                         log_err(cd, _("Device %s is not active.\n"), name);
1827                         r = -ENODEV;
1828                         break;
1829                 default:
1830                         log_err(cd, _("Invalid device %s.\n"), name);
1831                         r = -EINVAL;
1832         }
1833
1834         if (!cd)
1835                 dm_exit();
1836
1837         return r;
1838 }
1839
1840 // misc helper functions
1841 int crypt_volume_key_get(struct crypt_device *cd,
1842         int keyslot,
1843         char *volume_key,
1844         size_t *volume_key_size,
1845         const char *passphrase,
1846         size_t passphrase_size)
1847 {
1848         struct luks_masterkey *mk;
1849         char *processed_key = NULL;
1850         int r, key_len;
1851
1852         key_len = crypt_get_volume_key_size(cd);
1853         if (key_len > *volume_key_size) {
1854                 log_err(cd, _("Volume key buffer too small.\n"));
1855                 return -ENOMEM;
1856         }
1857
1858         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
1859                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
1860                                             passphrase, passphrase_size);
1861                 if (!processed_key) {
1862                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
1863                         return -EINVAL;
1864                 }
1865                 memcpy(volume_key, processed_key, key_len);
1866                 *volume_key_size = key_len;
1867                 safe_free(processed_key);
1868                 return 0;
1869         }
1870
1871         if (isLUKS(cd->type)) {
1872                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1873                                         passphrase_size, &cd->hdr, &mk, cd);
1874
1875                 if (r >= 0) {
1876                         memcpy(volume_key, mk->key, mk->keyLength);
1877                         *volume_key_size = mk->keyLength;
1878                 }
1879
1880                 LUKS_dealloc_masterkey(mk);
1881                 return r;
1882         }
1883
1884         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
1885         return -EINVAL;
1886 }
1887
1888 int crypt_volume_key_verify(struct crypt_device *cd,
1889         const char *volume_key,
1890         size_t volume_key_size)
1891 {
1892         struct luks_masterkey *mk;
1893         int r;
1894
1895         if (!isLUKS(cd->type)) {
1896                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1897                 return -EINVAL;
1898         }
1899
1900         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1901         if (!mk)
1902                 return -ENOMEM;
1903
1904         r = LUKS_verify_master_key(&cd->hdr, mk);
1905
1906         if (r == -EPERM)
1907                 log_err(cd, _("Volume key does not match the volume.\n"));
1908
1909         LUKS_dealloc_masterkey(mk);
1910
1911         return r;
1912 }
1913
1914 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
1915 {
1916         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
1917         cd->timeout = timeout_sec;
1918 }
1919
1920 void crypt_set_password_retry(struct crypt_device *cd, int tries)
1921 {
1922         log_dbg("Password retry count set to %d.", tries);
1923         cd->tries = tries;
1924 }
1925
1926 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
1927 {
1928         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
1929         cd->iteration_time = iteration_time_ms;
1930 }
1931
1932 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
1933 {
1934         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
1935         cd->password_verify = password_verify ? 1 : 0;
1936 }
1937
1938 int crypt_memory_lock(struct crypt_device *cd, int lock)
1939 {
1940         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
1941 }
1942
1943 // reporting
1944 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
1945 {
1946         int r;
1947
1948         if (!cd && dm_init(NULL, 1) < 0)
1949                 return CRYPT_INVALID;
1950
1951         r = dm_status_device(name);
1952
1953         if (!cd)
1954                 dm_exit();
1955
1956         if (r < 0 && r != -ENODEV)
1957                 return CRYPT_INVALID;
1958
1959         if (r == 0)
1960                 return CRYPT_ACTIVE;
1961
1962         if (r > 0)
1963                 return CRYPT_BUSY;
1964
1965         return CRYPT_INACTIVE;
1966 }
1967
1968 static void hexprintICB(struct crypt_device *cd, char *d, int n)
1969 {
1970         int i;
1971         for(i = 0; i < n; i++)
1972                 log_std(cd, "%02hhx ", (char)d[i]);
1973 }
1974
1975 int crypt_dump(struct crypt_device *cd)
1976 {
1977         int i;
1978         if (!isLUKS(cd->type)) { //FIXME
1979                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1980                 return -EINVAL;
1981         }
1982
1983         log_std(cd, "LUKS header information for %s\n\n", cd->device);
1984         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
1985         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
1986         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
1987         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
1988         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
1989         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
1990         log_std(cd, "MK digest:     \t");
1991         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
1992         log_std(cd, "\n");
1993         log_std(cd, "MK salt:       \t");
1994         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
1995         log_std(cd, "\n               \t");
1996         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1997         log_std(cd, "\n");
1998         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
1999         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2000         for(i = 0; i < LUKS_NUMKEYS; i++) {
2001                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2002                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2003                         log_std(cd, "\tIterations:         \t%d\n",
2004                                 cd->hdr.keyblock[i].passwordIterations);
2005                         log_std(cd, "\tSalt:               \t");
2006                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2007                                     LUKS_SALTSIZE/2);
2008                         log_std(cd, "\n\t                      \t");
2009                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2010                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2011                         log_std(cd, "\n");
2012
2013                         log_std(cd, "\tKey material offset:\t%d\n",
2014                                 cd->hdr.keyblock[i].keyMaterialOffset);
2015                         log_std(cd, "\tAF stripes:            \t%d\n",
2016                                 cd->hdr.keyblock[i].stripes);
2017                 }
2018                 else
2019                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2020         }
2021         return 0;
2022 }
2023
2024 const char *crypt_get_cipher(struct crypt_device *cd)
2025 {
2026         if (isPLAIN(cd->type))
2027                 return cd->plain_cipher;
2028
2029         if (isLUKS(cd->type))
2030                 return cd->hdr.cipherName;
2031
2032         return NULL;
2033 }
2034
2035 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2036 {
2037         if (isPLAIN(cd->type))
2038                 return cd->plain_cipher_mode;
2039
2040         if (isLUKS(cd->type))
2041                 return cd->hdr.cipherMode;
2042
2043         return NULL;
2044 }
2045
2046 const char *crypt_get_uuid(struct crypt_device *cd)
2047 {
2048         if (isLUKS(cd->type))
2049                 return cd->hdr.uuid;
2050
2051         return NULL;
2052 }
2053
2054 int crypt_get_volume_key_size(struct crypt_device *cd)
2055 {
2056         if (isPLAIN(cd->type))
2057                 return cd->volume_key->keyLength;
2058
2059         if (isLUKS(cd->type))
2060                 return cd->hdr.keyBytes;
2061
2062         return 0;
2063 }
2064
2065 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2066 {
2067         if (isPLAIN(cd->type))
2068                 return cd->plain_hdr.offset;
2069
2070         if (isLUKS(cd->type))
2071                 return cd->hdr.payloadOffset;
2072
2073         return 0;
2074 }
2075
2076 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2077 {
2078         if (!isLUKS(cd->type)) {
2079                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2080                 return CRYPT_SLOT_INVALID;
2081         }
2082
2083         return LUKS_keyslot_info(&cd->hdr, keyslot);
2084 }