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 "loopaes.h"
  11 #include "internal.h"
  12 #include "crypto_backend.h"
  13
  14 struct crypt_device {
  15         char *type;
  16
  17         char *device;
  18         struct volume_key *volume_key;
  19         uint64_t timeout;
  20         uint64_t iteration_time;
  21         int tries;
  22         int password_verify;
  23         int rng_type;
  24
  25         /* used in CRYPT_LUKS1 */
  26         struct luks_phdr hdr;
  27         uint64_t PBKDF2_per_sec;
  28
  29         /* used in CRYPT_PLAIN */
  30         struct crypt_params_plain plain_hdr;
  31         char *plain_cipher;
  32         char *plain_cipher_mode;
  33         char *plain_uuid;
  34
  35         /* used in CRYPT_LOOPAES */
  36         struct crypt_params_loopaes loopaes_hdr;
  37         char *loopaes_cipher;
  38         char *loopaes_cipher_mode;
  39         char *loopaes_uuid;
  40         unsigned int loopaes_key_size;
  41
  42         /* callbacks definitions */
  43         void (*log)(int level, const char *msg, void *usrptr);
  44         void *log_usrptr;
  45         int (*confirm)(const char *msg, void *usrptr);
  46         void *confirm_usrptr;
  47         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  48         void *password_usrptr;
  49 };
  50
  51 /* Log helper */
  52 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
  53 static int _debug_level = 0;
  54
  55 void crypt_set_debug_level(int level)
  56 {
  57         _debug_level = level;
  58 }
  59
  60 int crypt_get_debug_level()
  61 {
  62         return _debug_level;
  63 }
  64
  65 void crypt_log(struct crypt_device *cd, int level, const char *msg)
  66 {
  67         if (cd && cd->log)
  68                 cd->log(level, msg, cd->log_usrptr);
  69         else if (_default_log)
  70                 _default_log(level, msg, NULL);
  71 }
  72
  73 void logger(struct crypt_device *cd, int level, const char *file,
  74             int line, const char *format, ...)
  75 {
  76         va_list argp;
  77         char *target = NULL;
  78
  79         va_start(argp, format);
  80
  81         if (vasprintf(&target, format, argp) > 0) {
  82                 if (level >= 0) {
  83                         crypt_log(cd, level, target);
  84 #ifdef CRYPT_DEBUG
  85                 } else if (_debug_level)
  86                         printf("# %s:%d %s\n", file ?: "?", line, target);
  87 #else
  88                 } else if (_debug_level)
  89                         printf("# %s\n", target);
  90 #endif
  91         }
  92
  93         va_end(argp);
  94         free(target);
  95 }
  96
  97 static int init_crypto(struct crypt_device *ctx)
  98 {
  99         int r;
 100
 101         r = crypt_random_init(ctx);
 102         if (r < 0) {
 103                 log_err(ctx, _("Cannot initialize crypto RNG backend.\n"));
 104                 return r;
 105         }
 106
 107         r = crypt_backend_init(ctx);
 108         if (r < 0)
 109                 log_err(ctx, _("Cannot initialize crypto backend.\n"));
 110
 111         return r;
 112 }
 113
 114 /*
 115  * Password processing behaviour matrix of process_key
 116  *
 117  * from binary file: check if there is sufficently large key material
 118  * interactive & from fd: hash if requested, otherwise crop or pad with '0'
 119  */
 120 static char *process_key(struct crypt_device *cd, const char *hash_name,
 121                          const char *key_file, size_t key_size,
 122                          const char *pass, size_t passLen)
 123 {
 124         char *key;
 125
 126         if (!key_size)
 127                 return NULL;
 128
 129         key = crypt_safe_alloc(key_size);
 130         memset(key, 0, key_size);
 131
 132         /* key is coming from binary file */
 133         if (key_file && strcmp(key_file, "-")) {
 134                 if(passLen < key_size) {
 135                         log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
 136                                 key_size, key_file);
 137                         crypt_safe_free(key);
 138                         return NULL;
 139                 }
 140                 memcpy(key, pass, key_size);
 141                 return key;
 142         }
 143
 144         /* key is coming from tty, fd or binary stdin */
 145         if (hash_name) {
 146                 if (crypt_plain_hash(cd, hash_name, key, key_size, pass, passLen) < 0) {
 147                         log_err(cd, _("Key processing error (using hash algorithm %s).\n"),
 148                                 hash_name);
 149                         crypt_safe_free(key);
 150                         return NULL;
 151                 }
 152         } else if (passLen > key_size) {
 153                 memcpy(key, pass, key_size);
 154         } else {
 155                 memcpy(key, pass, passLen);
 156         }
 157
 158         return key;
 159 }
 160
 161 static int isPLAIN(const char *type)
 162 {
 163         return (type && !strcmp(CRYPT_PLAIN, type));
 164 }
 165
 166 static int isLUKS(const char *type)
 167 {
 168         return (type && !strcmp(CRYPT_LUKS1, type));
 169 }
 170
 171 static int isLOOPAES(const char *type)
 172 {
 173         return (type && !strcmp(CRYPT_LOOPAES, type));
 174 }
 175
 176 /* keyslot helpers */
 177 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 178 {
 179         if (*keyslot == CRYPT_ANY_SLOT) {
 180                 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
 181                 if (*keyslot < 0) {
 182                         log_err(cd, _("All key slots full.\n"));
 183                         return -EINVAL;
 184                 }
 185         }
 186
 187         switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
 188                 case CRYPT_SLOT_INVALID:
 189                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 190                                 *keyslot, LUKS_NUMKEYS - 1);
 191                         return -EINVAL;
 192                 case CRYPT_SLOT_INACTIVE:
 193                         break;
 194                 default:
 195                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 196                                 *keyslot);
 197                         return -EINVAL;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int verify_other_keyslot(struct crypt_device *cd,
 204                                 const char *key_file,
 205                                 int keyIndex)
 206 {
 207         struct volume_key *vk = NULL;
 208         crypt_keyslot_info ki;
 209         int openedIndex, r;
 210         char *password = NULL;
 211         unsigned int passwordLen;
 212
 213         r = crypt_get_key(_("Enter any remaining LUKS passphrase: "),
 214                           &password, &passwordLen, 0, key_file, cd->timeout,
 215                           cd->password_verify, cd);
 216         if(r < 0)
 217                 goto out;
 218
 219         ki = crypt_keyslot_status(cd, keyIndex);
 220         if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */
 221                 LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
 222
 223         openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
 224                                              password, passwordLen,
 225                                              &cd->hdr, &vk, cd);
 226
 227         if (ki == CRYPT_SLOT_ACTIVE)
 228                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 229
 230         if (openedIndex < 0)
 231                 r = -EPERM;
 232         else
 233                 log_verbose(cd, _("Key slot %d verified.\n"), openedIndex);
 234 out:
 235         crypt_free_volume_key(vk);
 236         crypt_safe_free(password);
 237         return r;
 238 }
 239
 240 static int find_keyslot_by_passphrase(struct crypt_device *cd,
 241                                       const char *key_file,
 242                                       char *message)
 243 {
 244         struct volume_key *vk = NULL;
 245         char *password = NULL;
 246         unsigned int passwordLen;
 247         int r;
 248
 249         r = crypt_get_key(message,&password,&passwordLen, 0, key_file,
 250                           cd->timeout, cd->password_verify, cd);
 251         if (r < 0)
 252                 goto out;
 253
 254         r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
 255                                    passwordLen, &cd->hdr, &vk, cd);
 256 out:
 257         crypt_free_volume_key(vk);
 258         crypt_safe_free(password);
 259         return r;
 260 }
 261
 262 static int luks_remove_helper(struct crypt_device *cd,
 263                               int key_slot,
 264                               const char *other_key_file,
 265                               const char *key_file,
 266                               int verify)
 267 {
 268         crypt_keyslot_info ki;
 269         int r = -EINVAL;
 270
 271         if (key_slot == CRYPT_ANY_SLOT) {
 272                 key_slot = find_keyslot_by_passphrase(cd, key_file,
 273                                 _("Enter LUKS passphrase to be deleted: "));
 274                 if(key_slot < 0) {
 275                         r = -EPERM;
 276                         goto out;
 277                 }
 278
 279                 log_std(cd, _("Key slot %d selected for deletion.\n"), key_slot);
 280         }
 281
 282         ki = crypt_keyslot_status(cd, key_slot);
 283         if (ki == CRYPT_SLOT_INVALID) {
 284                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 285                         key_slot, LUKS_NUMKEYS - 1);
 286                 r = -EINVAL;
 287                 goto out;
 288         }
 289         if (ki <= CRYPT_SLOT_INACTIVE) {
 290                 log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
 291                 r = -EINVAL;
 292                 goto out;
 293         }
 294
 295         if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm &&
 296             !(cd->confirm(_("This is the last keyslot."
 297                             " Device will become unusable after purging this key."),
 298                          cd->confirm_usrptr))) {
 299                 r = -EINVAL;
 300                 goto out;
 301         }
 302
 303         if(verify)
 304                 r = verify_other_keyslot(cd, other_key_file, key_slot);
 305         else
 306                 r = 0;
 307
 308         if (!r)
 309                 r = crypt_keyslot_destroy(cd, key_slot);
 310 out:
 311         return (r < 0) ? r : 0;
 312 }
 313
 314 static int create_device_helper(struct crypt_device *cd,
 315                                 const char *name,
 316                                 const char *hash,
 317                                 const char *cipher,
 318                                 const char *cipher_mode,
 319                                 const char *key_file,
 320                                 const char *key,
 321                                 unsigned int keyLen,
 322                                 int key_size,
 323                                 uint64_t size,
 324                                 uint64_t skip,
 325                                 uint64_t offset,
 326                                 const char *uuid,
 327                                 int read_only,
 328                                 unsigned int flags,
 329                                 int reload)
 330 {
 331         crypt_status_info ci;
 332         char *dm_cipher = NULL;
 333         char *processed_key = NULL;
 334         int r;
 335
 336         if (!name)
 337                 return -EINVAL;
 338
 339         ci = crypt_status(cd, name);
 340         if (ci == CRYPT_INVALID)
 341                 return -EINVAL;
 342
 343         if (reload && ci < CRYPT_ACTIVE)
 344                 return -EINVAL;
 345
 346         if (!reload && ci >= CRYPT_ACTIVE) {
 347                 log_err(cd, _("Device %s already exists.\n"), name);
 348                 return -EEXIST;
 349         }
 350
 351         if (key_size < 0 || key_size > 1024) {
 352                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 353                 return -EINVAL;
 354         }
 355
 356         r = device_check_and_adjust(cd, cd->device, !reload, &size, &offset, &read_only);
 357         if (r)
 358                 return r;
 359
 360         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 361                 return -ENOMEM;
 362
 363         processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
 364         if (!processed_key) {
 365                 r = -ENOENT;
 366                 goto out;
 367         }
 368
 369         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 370                              key_size, processed_key, read_only, reload);
 371 out:
 372         free(dm_cipher);
 373         crypt_safe_free(processed_key);
 374         return r;
 375 }
 376
 377 static int open_from_hdr_and_vk(struct crypt_device *cd,
 378                                 struct volume_key *vk,
 379                                 const char *name,
 380                                 uint32_t flags)
 381 {
 382         uint64_t size, offset;
 383         char *cipher;
 384         int read_only, no_uuid, r;
 385
 386         size = 0;
 387         offset = crypt_get_data_offset(cd);
 388         read_only = flags & CRYPT_ACTIVATE_READONLY;
 389         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 390
 391         r = device_check_and_adjust(cd, cd->device, 1, &size, &offset, &read_only);
 392         if (r)
 393                 return r;
 394
 395         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 396                      crypt_get_cipher_mode(cd)) < 0)
 397                 r = -ENOMEM;
 398         else
 399                 r = dm_create_device(name, cd->device, cipher, cd->type,
 400                                      no_uuid ? NULL : crypt_get_uuid(cd),
 401                                      size, 0, offset, vk->keylength, vk->key,
 402                                      read_only, 0);
 403         free(cipher);
 404         return r;
 405 }
 406
 407 static void log_wrapper(int level, const char *msg, void *usrptr)
 408 {
 409         void (*xlog)(int level, char *msg) = usrptr;
 410         xlog(level, (char *)msg);
 411 }
 412
 413 static int yesDialog_wrapper(const char *msg, void *usrptr)
 414 {
 415         int (*xyesDialog)(char *msg) = usrptr;
 416         return xyesDialog((char*)msg);
 417 }
 418
 419 int crypt_confirm(struct crypt_device *cd, const char *msg)
 420 {
 421         if (!cd || !cd->confirm)
 422                 return 1;
 423         else
 424                 return cd->confirm(msg, cd->confirm_usrptr);
 425 }
 426
 427 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 428                               unsigned int *key_len, int force_verify)
 429 {
 430         char *prompt = NULL;
 431         int r;
 432
 433         *key = NULL;
 434         if(!msg && asprintf(&prompt, _("Enter passphrase for %s: "),
 435                             cd->device) < 0)
 436                 return -ENOMEM;
 437
 438         if (!msg)
 439                 msg = prompt;
 440
 441         if (cd->password) {
 442                 *key = crypt_safe_alloc(MAX_TTY_PASSWORD_LEN);
 443                 if (!*key) {
 444                         r = -ENOMEM;
 445                         goto out;
 446                 }
 447                 r = cd->password(msg, *key, MAX_TTY_PASSWORD_LEN, cd->password_usrptr);
 448                 if (r < 0) {
 449                         crypt_safe_free(*key);
 450                         *key = NULL;
 451                 } else
 452                         *key_len = r;
 453         } else
 454                 r = crypt_get_key(msg, key, key_len, 0, NULL, cd->timeout,
 455                                   (force_verify || cd->password_verify), cd);
 456 out:
 457         free(prompt);
 458         return (r < 0) ? r: 0;
 459 }
 460
 461 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 462                                              struct volume_key **vk)
 463 {
 464         char *passphrase_read = NULL;
 465         unsigned int passphrase_size_read;
 466         int r = -EINVAL, tries = cd->tries;
 467
 468         *vk = NULL;
 469         do {
 470                 crypt_free_volume_key(*vk);
 471                 *vk = NULL;
 472
 473                 r = key_from_terminal(cd, NULL, &passphrase_read,
 474                                       &passphrase_size_read, 0);
 475                 if(r < 0)
 476                         goto out;
 477
 478                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 479                                            passphrase_size_read, &cd->hdr, vk, cd);
 480                 crypt_safe_free(passphrase_read);
 481                 passphrase_read = NULL;
 482         } while (r == -EPERM && (--tries > 0));
 483 out:
 484         if (r < 0) {
 485                 crypt_free_volume_key(*vk);
 486                 *vk = NULL;
 487         }
 488
 489         crypt_safe_free(passphrase_read);
 490         return r;
 491 }
 492
 493 static int key_from_file(struct crypt_device *cd, char *msg,
 494                           char **key, unsigned int *key_len,
 495                           const char *key_file, size_t key_size)
 496 {
 497         return crypt_get_key(msg, key, key_len, key_size, key_file,
 498                              cd->timeout, 0, cd);
 499 }
 500
 501 static int _crypt_init(struct crypt_device **cd,
 502                        const char *type,
 503                        struct crypt_options *options,
 504                        int load, int need_dm)
 505 {
 506         int init_by_name, r;
 507
 508         /* if it is plain device and mapping table is being reloaded
 509         initialize it by name*/
 510         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 511
 512         /* Some of old API calls do not require DM in kernel,
 513            fake initialisation by initialise it with kernel_check disabled */
 514         if (!need_dm)
 515                 (void)dm_init(NULL, 0);
 516         if (init_by_name)
 517                 r = crypt_init_by_name(cd, options->name);
 518         else
 519                 r = crypt_init(cd, options->device);
 520         if (!need_dm)
 521                 dm_exit();
 522
 523         if (r)
 524                 return -EINVAL;
 525
 526         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 527         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 528
 529         crypt_set_timeout(*cd, options->timeout);
 530         crypt_set_password_retry(*cd, options->tries);
 531         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 532         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 533
 534         if (load && !init_by_name)
 535                 r = crypt_load(*cd, type, NULL);
 536
 537         if (!r && type && !(*cd)->type) {
 538                 (*cd)->type = strdup(type);
 539                 if (!(*cd)->type)
 540                         r = -ENOMEM;
 541         }
 542
 543         if (r)
 544                 crypt_free(*cd);
 545
 546         return r;
 547 }
 548
 549 void crypt_set_log_callback(struct crypt_device *cd,
 550         void (*log)(int level, const char *msg, void *usrptr),
 551         void *usrptr)
 552 {
 553         if (!cd)
 554                 _default_log = log;
 555         else {
 556                 cd->log = log;
 557                 cd->log_usrptr = usrptr;
 558         }
 559 }
 560
 561 void crypt_set_confirm_callback(struct crypt_device *cd,
 562         int (*confirm)(const char *msg, void *usrptr),
 563         void *usrptr)
 564 {
 565         cd->confirm = confirm;
 566         cd->confirm_usrptr = usrptr;
 567 }
 568
 569 void crypt_set_password_callback(struct crypt_device *cd,
 570         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 571         void *usrptr)
 572 {
 573         cd->password = password;
 574         cd->password_usrptr = usrptr;
 575 }
 576
 577 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 578  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 579  *          flags, icb */
 580 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 581 {
 582         struct crypt_device *cd = NULL;
 583         char *key = NULL;
 584         unsigned int keyLen;
 585         int r;
 586
 587         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 588         if (r)
 589                 return r;
 590
 591         r = crypt_get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 592                           options->key_file, cd->timeout, cd->password_verify, cd);
 593         if (!r)
 594                 r = create_device_helper(cd, options->name, options->hash,
 595                         options->cipher, NULL, options->key_file, key, keyLen,
 596                         options->key_size, options->size, options->skip,
 597                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 598                         options->flags, update);
 599
 600         crypt_safe_free(key);
 601         crypt_free(cd);
 602         return r;
 603 }
 604
 605 int crypt_create_device(struct crypt_options *options)
 606 {
 607         return crypt_create_and_update_device(options, 0);
 608 }
 609
 610 int crypt_update_device(struct crypt_options *options)
 611 {
 612         return crypt_create_and_update_device(options, 1);
 613 }
 614
 615 /* OPTIONS: name, size, icb */
 616 int crypt_resize_device(struct crypt_options *options)
 617 {
 618         struct crypt_device *cd = NULL;
 619         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 620         char *type = NULL;
 621         uint64_t size, skip, offset;
 622         int key_size, read_only, r;
 623
 624         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 625
 626         if (dm_init(NULL, 1) < 0)
 627                 return -ENOSYS;
 628
 629         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 630                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 631         if (r < 0) {
 632                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 633                 goto out;
 634         }
 635
 636         /* Try to determine type of device from UUID */
 637         type = CRYPT_PLAIN;
 638         if (uuid) {
 639                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 640                         type = CRYPT_PLAIN;
 641                         free (uuid);
 642                         uuid = NULL;
 643                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 644                         type = CRYPT_LUKS1;
 645         }
 646
 647         if (!options->device)
 648                 options->device = device;
 649
 650         r = _crypt_init(&cd, type, options, 1, 1);
 651         if (r)
 652                 goto out;
 653
 654         size = options->size;
 655         r = device_check_and_adjust(cd, device, 0, &size, &offset, &read_only);
 656         if (r)
 657                 goto out;
 658
 659         r = dm_create_device(options->name, device, cipher, type,
 660                              crypt_get_uuid(cd), size, skip, offset,
 661                              key_size, key, read_only, 1);
 662 out:
 663         crypt_safe_free(key);
 664         free(cipher);
 665         if (options->device == device)
 666                 options->device = NULL;
 667         free(device);
 668         free(uuid);
 669         crypt_free(cd);
 670         dm_exit();
 671         return r;
 672 }
 673
 674 /* OPTIONS: name, icb */
 675 int crypt_query_device(struct crypt_options *options)
 676 {
 677         int read_only, r;
 678
 679         log_dbg("Query device %s.", options->name);
 680
 681         if (dm_init(NULL, 1) < 0)
 682                 return -ENOSYS;
 683
 684         r = dm_status_device(options->name);
 685         if (r < 0)
 686                 goto out;
 687
 688         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 689                             &options->skip, &options->offset, (char **)&options->cipher,
 690                             &options->key_size, NULL, &read_only, NULL, NULL);
 691         if (r >= 0) {
 692                 if (read_only)
 693                         options->flags |= CRYPT_FLAG_READONLY;
 694
 695                 options->flags |= CRYPT_FLAG_FREE_DEVICE;
 696                 options->flags |= CRYPT_FLAG_FREE_CIPHER;
 697
 698                 r = 1;
 699         }
 700 out:
 701         if (r == -ENODEV)
 702                 r = 0;
 703
 704         dm_exit();
 705         return r;
 706 }
 707
 708 /* OPTIONS: name, icb */
 709 int crypt_remove_device(struct crypt_options *options)
 710 {
 711         struct crypt_device *cd = NULL;
 712         int r;
 713
 714         r = crypt_init_by_name(&cd, options->name);
 715         if (r == 0)
 716                 r = crypt_deactivate(cd, options->name);
 717
 718         crypt_free(cd);
 719         return r;
 720
 721 }
 722
 723 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 724  *          new_key_file, iteration_time, timeout, flags, icb */
 725 int crypt_luksFormat(struct crypt_options *options)
 726 {
 727         char cipherName[LUKS_CIPHERNAME_L];
 728         char cipherMode[LUKS_CIPHERMODE_L];
 729         char *password=NULL;
 730         unsigned int passwordLen;
 731         struct crypt_device *cd = NULL;
 732         struct crypt_params_luks1 cp = {
 733                 .hash = options->hash,
 734                 .data_alignment = options->align_payload
 735         };
 736         int r;
 737
 738         r = crypt_parse_name_and_mode(options->cipher, cipherName, NULL, cipherMode);
 739         if(r < 0) {
 740                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 741                 return r;
 742         }
 743
 744         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 745                 return r;
 746
 747         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 748                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 749                         options->key_slot, LUKS_NUMKEYS - 1);
 750                 r = -EINVAL;
 751                 goto out;
 752         }
 753
 754         r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 755                           options->new_key_file, cd->timeout, cd->password_verify, cd);
 756
 757         if(r < 0)
 758                 goto out;
 759
 760         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 761                          NULL, NULL, options->key_size, &cp);
 762         if (r < 0)
 763                 goto out;
 764
 765         /* Add keyslot using internally stored volume key generated during format */
 766         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 767                                             password, passwordLen);
 768 out:
 769         crypt_free(cd);
 770         crypt_safe_free(password);
 771         return (r < 0) ? r : 0;
 772 }
 773
 774 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 775 int crypt_luksOpen(struct crypt_options *options)
 776 {
 777         struct crypt_device *cd = NULL;
 778         uint32_t flags = 0;
 779         int r;
 780
 781         if (!options->name)
 782                 return -EINVAL;
 783
 784         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 785         if (r)
 786                 return r;
 787
 788         if (options->flags & CRYPT_FLAG_READONLY)
 789                 flags |= CRYPT_ACTIVATE_READONLY;
 790
 791         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 792                 flags |= CRYPT_ACTIVATE_NO_UUID;
 793
 794         if (options->key_file)
 795                 r = crypt_activate_by_keyfile(cd, options->name,
 796                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 797                         flags);
 798         else
 799                 r = crypt_activate_by_passphrase(cd, options->name,
 800                         CRYPT_ANY_SLOT, options->passphrase,
 801                         options->passphrase ? strlen(options->passphrase) : 0,
 802                         flags);
 803
 804         crypt_free(cd);
 805         return (r < 0) ? r : 0;
 806 }
 807
 808 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 809 int crypt_luksKillSlot(struct crypt_options *options)
 810 {
 811         struct crypt_device *cd = NULL;
 812         int r;
 813
 814         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 815         if (r)
 816                 return r;
 817
 818         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 819                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 820
 821         crypt_free(cd);
 822         return (r < 0) ? r : 0;
 823 }
 824
 825 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 826 int crypt_luksRemoveKey(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, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 836                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 837
 838         crypt_free(cd);
 839         return (r < 0) ? r : 0;
 840 }
 841
 842
 843 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 844             iteration_time, timeout, icb */
 845 int crypt_luksAddKey(struct crypt_options *options)
 846 {
 847         struct crypt_device *cd = NULL;
 848         int r = -EINVAL;
 849
 850         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 851         if (r)
 852                 return r;
 853
 854         if (options->key_file || options->new_key_file)
 855                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 856                                                  options->key_file, 0,
 857                                                  options->new_key_file, 0);
 858         else
 859                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 860                                                     NULL, 0, NULL, 0);
 861
 862         crypt_free(cd);
 863         return (r < 0) ? r : 0;
 864 }
 865
 866 /* OPTIONS: device, icb */
 867 int crypt_luksUUID(struct crypt_options *options)
 868 {
 869         struct crypt_device *cd = NULL;
 870         char *uuid;
 871         int r;
 872
 873         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 874         if (r)
 875                 return r;
 876
 877         uuid = (char *)crypt_get_uuid(cd);
 878         log_std(cd, uuid ?: "");
 879         log_std(cd, "\n");
 880         crypt_free(cd);
 881         return 0;
 882 }
 883
 884 /* OPTIONS: device, icb */
 885 int crypt_isLuks(struct crypt_options *options)
 886 {
 887         struct crypt_device *cd = NULL;
 888         int r;
 889
 890         log_dbg("Check device %s for LUKS header.", options->device);
 891
 892         r = init_crypto(cd);
 893         if (r < 0)
 894                 return r;
 895
 896         r = crypt_init(&cd, options->device);
 897         if (r < 0)
 898                 return -EINVAL;
 899
 900         /* Do print fail here, no need to crypt_load() */
 901         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 902
 903         crypt_free(cd);
 904         return r;
 905 }
 906
 907 /* OPTIONS: device, icb */
 908 int crypt_luksDump(struct crypt_options *options)
 909 {
 910         struct crypt_device *cd = NULL;
 911         int r;
 912
 913         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 914         if(r < 0)
 915                 return r;
 916
 917         r = crypt_dump(cd);
 918
 919         crypt_free(cd);
 920         return r;
 921 }
 922
 923 void crypt_get_error(char *buf, size_t size)
 924 {
 925         const char *error = get_error();
 926
 927         if (!buf || size < 1)
 928                 set_error(NULL);
 929         else if (error) {
 930                 strncpy(buf, error, size - 1);
 931                 buf[size - 1] = '\0';
 932                 set_error(NULL);
 933         } else
 934                 buf[0] = '\0';
 935 }
 936
 937 void crypt_put_options(struct crypt_options *options)
 938 {
 939         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 940                 free((char *)options->device);
 941                 options->device = NULL;
 942                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 943         }
 944         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 945                 free((char *)options->cipher);
 946                 options->cipher = NULL;
 947                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 948         }
 949 }
 950
 951 const char *crypt_get_dir(void)
 952 {
 953         return dm_get_dir();
 954 }
 955
 956 /////////////////////////////////
 957 //
 958 // New API
 959 //
 960
 961 int crypt_init(struct crypt_device **cd, const char *device)
 962 {
 963         struct crypt_device *h = NULL;
 964
 965         if (!cd)
 966                 return -EINVAL;
 967
 968         log_dbg("Allocating crypt device %s context.", device);
 969
 970         if (device && !device_ready(NULL, device, O_RDONLY))
 971                 return -ENOTBLK;
 972
 973         if (!(h = malloc(sizeof(struct crypt_device))))
 974                 return -ENOMEM;
 975
 976         memset(h, 0, sizeof(*h));
 977
 978         if (device) {
 979                 h->device = strdup(device);
 980                 if (!h->device) {
 981                         free(h);
 982                         return -ENOMEM;
 983                 }
 984         } else
 985                 h->device = NULL;
 986
 987         if (dm_init(h, 1) < 0) {
 988                 free(h);
 989                 return -ENOSYS;
 990         }
 991
 992         h->iteration_time = 1000;
 993         h->password_verify = 0;
 994         h->tries = 3;
 995         h->rng_type = crypt_random_default_key_rng();
 996         *cd = h;
 997         return 0;
 998 }
 999
1000 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1001 {
1002         crypt_status_info ci;
1003         struct crypt_active_device cad;
1004         char *device = NULL, *cipher_full = NULL, *device_uuid = NULL;
1005         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
1006         char *key = NULL;
1007         int key_size = 0, key_nums, r;
1008
1009
1010         log_dbg("Allocating crypt device context by device %s.", name);
1011
1012         ci = crypt_status(NULL, name);
1013         if (ci == CRYPT_INVALID)
1014                 return -ENODEV;
1015
1016         if (ci < CRYPT_ACTIVE) {
1017                 log_err(NULL, _("Device %s is not active.\n"), name);
1018                 return -ENODEV;
1019         }
1020
1021         r = dm_query_device(name, &device, &cad.size, &cad.iv_offset, &cad.offset,
1022                             &cipher_full, &key_size, &key, NULL, NULL,
1023                             &device_uuid);
1024         if (r < 0)
1025                 goto out;
1026
1027         /* Underlying device disappeared but mapping still active */
1028         if (!device)
1029                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1030                             name);
1031
1032         *cd = NULL;
1033         r = crypt_init(cd, device);
1034         if (r < 0)
1035                 goto out;
1036
1037         /* Try to initialise basic parameters from active device */
1038         if (device_uuid) {
1039                 if (!strncmp(CRYPT_PLAIN, device_uuid, sizeof(CRYPT_PLAIN)-1)) {
1040                         (*cd)->type = strdup(CRYPT_PLAIN);
1041                         (*cd)->plain_uuid = strdup(device_uuid);
1042                         (*cd)->plain_hdr.hash = NULL; /* no way to get this */
1043                         (*cd)->plain_hdr.offset = cad.offset;
1044                         (*cd)->plain_hdr.skip = cad.iv_offset;
1045                         (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1046                         if (!(*cd)->volume_key) {
1047                                 r = -ENOMEM;
1048                                 goto out;
1049                         }
1050
1051                         r = crypt_parse_name_and_mode(cipher_full, cipher, NULL, cipher_mode);
1052                         if (!r) {
1053                                 (*cd)->plain_cipher = strdup(cipher);
1054                                 (*cd)->plain_cipher_mode = strdup(cipher_mode);
1055                         }
1056                 } else if (!strncmp(CRYPT_LOOPAES, device_uuid, sizeof(CRYPT_LOOPAES)-1)) {
1057                         (*cd)->type = strdup(CRYPT_LOOPAES);
1058                         (*cd)->loopaes_uuid = strdup(device_uuid);
1059                         (*cd)->loopaes_hdr.offset = cad.offset;
1060
1061                         r = crypt_parse_name_and_mode(cipher_full, cipher,
1062                                                       &key_nums, cipher_mode);
1063                         if (!r) {
1064                                 (*cd)->loopaes_cipher = strdup(cipher);
1065                                 (*cd)->loopaes_cipher_mode = strdup(cipher_mode);
1066                                 /* version 3 uses last key for IV */
1067                                 if (key_size % key_nums)
1068                                         key_nums++;
1069                                 (*cd)->loopaes_key_size = key_size / key_nums;
1070                         }
1071                 } else if (!strncmp(CRYPT_LUKS1, device_uuid, sizeof(CRYPT_LUKS1)-1)) {
1072                         if (device) {
1073                                 if (crypt_load(*cd, CRYPT_LUKS1, NULL) < 0 ||
1074                                     crypt_volume_key_verify(*cd, key, key_size) < 0) {
1075                                         log_dbg("LUKS device header does not match active device.");
1076                                         goto out;
1077                                 }
1078
1079                                 (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1080                                 if (!(*cd)->volume_key) {
1081                                         r = -ENOMEM;
1082                                         goto out;
1083                                 }
1084                         }
1085                 }
1086         } else
1087                 log_dbg("Active device has no UUID set, some parameters are not set.");
1088
1089 out:
1090         if (r < 0) {
1091                 crypt_free(*cd);
1092                 *cd = NULL;
1093         }
1094         crypt_safe_free(key);
1095         free(device);
1096         free(cipher_full);
1097         free(device_uuid);
1098         return r;
1099 }
1100
1101 static int _crypt_format_plain(struct crypt_device *cd,
1102                                const char *cipher,
1103                                const char *cipher_mode,
1104                                const char *uuid,
1105                                size_t volume_key_size,
1106                                struct crypt_params_plain *params)
1107 {
1108         if (!cipher || !cipher_mode) {
1109                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1110                 return -EINVAL;
1111         }
1112
1113         if (volume_key_size > 1024) {
1114                 log_err(cd, _("Invalid key size.\n"));
1115                 return -EINVAL;
1116         }
1117
1118         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
1119         if (!cd->volume_key)
1120                 return -ENOMEM;
1121
1122         cd->plain_cipher = strdup(cipher);
1123         cd->plain_cipher_mode = strdup(cipher_mode);
1124
1125         if (uuid)
1126                 cd->plain_uuid = strdup(uuid);
1127
1128         if (params && params->hash)
1129                 cd->plain_hdr.hash = strdup(params->hash);
1130
1131         cd->plain_hdr.offset = params ? params->offset : 0;
1132         cd->plain_hdr.skip = params ? params->skip : 0;
1133
1134         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1135                 return -ENOMEM;
1136
1137         return 0;
1138 }
1139
1140 static int _crypt_format_luks1(struct crypt_device *cd,
1141                                const char *cipher,
1142                                const char *cipher_mode,
1143                                const char *uuid,
1144                                const char *volume_key,
1145                                size_t volume_key_size,
1146                                struct crypt_params_luks1 *params)
1147 {
1148         int r;
1149         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1150         unsigned long alignment_offset = 0;
1151
1152         if (!cd->device) {
1153                 log_err(cd, _("Can't format LUKS without device.\n"));
1154                 return -EINVAL;
1155         }
1156
1157         if (volume_key)
1158                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
1159                                                       volume_key);
1160         else
1161                 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
1162
1163         if(!cd->volume_key)
1164                 return -ENOMEM;
1165
1166         if (params && params->data_alignment)
1167                 required_alignment = params->data_alignment * SECTOR_SIZE;
1168         else
1169                 get_topology_alignment(cd->device, &required_alignment,
1170                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1171
1172         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1173                                (params && params->hash) ? params->hash : "sha1",
1174                                uuid, LUKS_STRIPES,
1175                                required_alignment / SECTOR_SIZE,
1176                                alignment_offset / SECTOR_SIZE,
1177                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1178         if(r < 0)
1179                 return r;
1180
1181         /* Wipe first 8 sectors - fs magic numbers etc. */
1182         r = wipe_device_header(cd->device, 8);
1183         if(r < 0) {
1184                 if (r == -EBUSY)
1185                         log_err(cd, _("Cannot format device %s which is still in use.\n"),
1186                                 cd->device);
1187                 else
1188                         log_err(cd, _("Cannot wipe header on device %s.\n"),
1189                                 cd->device);
1190
1191                 return r;
1192         }
1193
1194         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1195
1196         return r;
1197 }
1198
1199 static int _crypt_format_loopaes(struct crypt_device *cd,
1200                                  const char *cipher,
1201                                  const char *uuid,
1202                                  size_t volume_key_size,
1203                                  struct crypt_params_loopaes *params)
1204 {
1205         if (!cd->device) {
1206                 log_err(cd, _("Can't format LOOPAES without device.\n"));
1207                 return -EINVAL;
1208         }
1209
1210         if (volume_key_size > 1024) {
1211                 log_err(cd, _("Invalid key size.\n"));
1212                 return -EINVAL;
1213         }
1214
1215         cd->loopaes_key_size = volume_key_size;
1216
1217         cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
1218
1219         if (uuid)
1220                 cd->loopaes_uuid = strdup(uuid);
1221
1222         if (params && params->hash)
1223                 cd->loopaes_hdr.hash = strdup(params->hash);
1224
1225         cd->loopaes_hdr.offset = params ? params->offset : 0;
1226
1227         return 0;
1228 }
1229
1230 int crypt_format(struct crypt_device *cd,
1231         const char *type,
1232         const char *cipher,
1233         const char *cipher_mode,
1234         const char *uuid,
1235         const char *volume_key,
1236         size_t volume_key_size,
1237         void *params)
1238 {
1239         int r;
1240
1241         if (!type)
1242                 return -EINVAL;
1243
1244         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", type);
1245
1246         r = init_crypto(cd);
1247         if (r < 0)
1248                 return r;
1249
1250         if (isPLAIN(type))
1251                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1252                                         uuid, volume_key_size, params);
1253         else if (isLUKS(type))
1254                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1255                                         uuid, volume_key, volume_key_size, params);
1256         else if (isLOOPAES(type))
1257                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1258         else {
1259                 /* FIXME: allow plugins here? */
1260                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1261                 r = -EINVAL;
1262         }
1263
1264         if (!r && !(cd->type = strdup(type)))
1265                 r = -ENOMEM;
1266
1267         if (r < 0) {
1268                 crypt_free_volume_key(cd->volume_key);
1269                 cd->volume_key = NULL;
1270         }
1271
1272         return r;
1273 }
1274
1275 int crypt_load(struct crypt_device *cd,
1276                const char *requested_type,
1277                void *params)
1278 {
1279         struct luks_phdr hdr;
1280         int r;
1281
1282         log_dbg("Trying to load %s crypt type from device %s.",
1283                 requested_type ?: "any", cd->device ?: "(none)");
1284
1285         if (!cd->device)
1286                 return -EINVAL;
1287
1288         if (requested_type && !isLUKS(requested_type))
1289                 return -EINVAL;
1290
1291         r = init_crypto(cd);
1292         if (r < 0)
1293                 return r;
1294
1295         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1296
1297         if (!r) {
1298                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1299                 cd->type = strdup(CRYPT_LUKS1);
1300                 if (!cd->type)
1301                         r = -ENOMEM;
1302         }
1303
1304         return r;
1305 }
1306
1307 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1308 {
1309         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
1310         uint64_t size, skip, offset;
1311         int key_size, read_only, r;
1312
1313         /* Device context type must be initialised */
1314         if (!cd->type || !crypt_get_uuid(cd))
1315                 return -EINVAL;
1316
1317         r = dm_query_device(name, &device, &size, &skip, &offset,
1318                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
1319         if (r < 0) {
1320                 log_err(NULL, _("Device %s is not active.\n"), name);
1321                 goto out;
1322         }
1323
1324         if (!uuid) {
1325                 r = -EINVAL;
1326                 goto out;
1327         }
1328
1329         r = device_check_and_adjust(cd, device, 0, &new_size, &offset, &read_only);
1330         if (r)
1331                 goto out;
1332
1333         if (new_size == size) {
1334                 log_dbg("Device has already requested size %" PRIu64
1335                         " sectors.", size);
1336                 r = 0;
1337                 goto out;
1338         }
1339
1340         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1341
1342         r = dm_create_device(name, device, cipher, cd->type,
1343                              crypt_get_uuid(cd), new_size, skip, offset,
1344                              key_size, key, read_only, 1);
1345 out:
1346         crypt_safe_free(key);
1347         free(cipher);
1348         free(device);
1349         free(uuid);
1350
1351         return r;
1352 }
1353
1354 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1355 {
1356         if (!isLUKS(cd->type)) {
1357                 log_err(cd, _("This operation is not supported for this device type.\n"));
1358                 return  -EINVAL;
1359         }
1360
1361         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1362                 log_dbg("UUID is the same as requested (%s) for device %s.",
1363                         uuid, cd->device);
1364                 return 0;
1365         }
1366
1367         if (uuid)
1368                 log_dbg("Requested new UUID change to %s for %s.", uuid, cd->device);
1369         else
1370                 log_dbg("Requested new UUID refresh for %s.", cd->device);
1371
1372         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1373                 return -EPERM;
1374
1375         return LUKS_hdr_uuid_set(cd->device, &cd->hdr, uuid, cd);
1376 }
1377
1378 int crypt_header_backup(struct crypt_device *cd,
1379                         const char *requested_type,
1380                         const char *backup_file)
1381 {
1382         int r;
1383
1384         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1385                 return -EINVAL;
1386
1387         r = init_crypto(cd);
1388         if (r < 0)
1389                 return r;
1390
1391         log_dbg("Requested header backup of device %s (%s) to "
1392                 "file %s.", cd->device, requested_type, backup_file);
1393
1394         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1395 }
1396
1397 int crypt_header_restore(struct crypt_device *cd,
1398                          const char *requested_type,
1399                          const char *backup_file)
1400 {
1401         int r;
1402
1403         if (requested_type && !isLUKS(requested_type))
1404                 return -EINVAL;
1405
1406         /* Some hash functions need initialized gcrypt library */
1407         r = init_crypto(cd);
1408         if (r < 0)
1409                 return r;
1410
1411         log_dbg("Requested header restore to device %s (%s) from "
1412                 "file %s.", cd->device, requested_type, backup_file);
1413
1414         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1415 }
1416
1417 void crypt_free(struct crypt_device *cd)
1418 {
1419         if (cd) {
1420                 log_dbg("Releasing crypt device %s context.", cd->device);
1421
1422                 dm_exit();
1423                 crypt_free_volume_key(cd->volume_key);
1424
1425                 free(cd->device);
1426                 free(cd->type);
1427
1428                 /* used in plain device only */
1429                 free((char*)cd->plain_hdr.hash);
1430                 free(cd->plain_cipher);
1431                 free(cd->plain_cipher_mode);
1432                 free(cd->plain_uuid);
1433
1434                 free(cd);
1435         }
1436 }
1437
1438 int crypt_suspend(struct crypt_device *cd,
1439                   const char *name)
1440 {
1441         crypt_status_info ci;
1442         int r, suspended = 0;
1443
1444         log_dbg("Suspending volume %s.", name);
1445
1446         ci = crypt_status(NULL, name);
1447         if (ci < CRYPT_ACTIVE) {
1448                 log_err(cd, _("Volume %s is not active.\n"), name);
1449                 return -EINVAL;
1450         }
1451
1452         if (!cd && dm_init(NULL, 1) < 0)
1453                 return -ENOSYS;
1454
1455         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1456                             NULL, NULL, NULL, NULL, &suspended, NULL);
1457         if (r < 0)
1458                 goto out;
1459
1460         if (suspended) {
1461                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1462                 r = -EINVAL;
1463                 goto out;
1464         }
1465
1466         r = dm_suspend_and_wipe_key(name);
1467         if (r == -ENOTSUP)
1468                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1469         else if (r)
1470                 log_err(cd, "Error during suspending device %s.\n", name);
1471 out:
1472         if (!cd)
1473                 dm_exit();
1474         return r;
1475 }
1476
1477 int crypt_resume_by_passphrase(struct crypt_device *cd,
1478                                const char *name,
1479                                int keyslot,
1480                                const char *passphrase,
1481                                size_t passphrase_size)
1482 {
1483         struct volume_key *vk = NULL;
1484         int r, suspended = 0;
1485
1486         log_dbg("Resuming volume %s.", name);
1487
1488         if (!isLUKS(cd->type)) {
1489                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1490                 r = -EINVAL;
1491                 goto out;
1492         }
1493
1494         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1495                             NULL, NULL, NULL, NULL, &suspended, NULL);
1496         if (r < 0)
1497                 return r;
1498
1499         if (!suspended) {
1500                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1501                 return -EINVAL;
1502         }
1503
1504         if (passphrase) {
1505                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1506                                            passphrase_size, &cd->hdr, &vk, cd);
1507         } else
1508                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1509
1510         if (r >= 0) {
1511                 keyslot = r;
1512                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1513                 if (r == -ENOTSUP)
1514                         log_err(cd, "Resume is not supported for device %s.\n", name);
1515                 else if (r)
1516                         log_err(cd, "Error during resuming device %s.\n", name);
1517         } else
1518                 r = keyslot;
1519 out:
1520         crypt_free_volume_key(vk);
1521         return r < 0 ? r : keyslot;
1522 }
1523
1524 int crypt_resume_by_keyfile(struct crypt_device *cd,
1525                             const char *name,
1526                             int keyslot,
1527                             const char *keyfile,
1528                             size_t keyfile_size)
1529 {
1530         struct volume_key *vk = NULL;
1531         char *passphrase_read = NULL;
1532         unsigned int passphrase_size_read;
1533         int r, suspended = 0;
1534
1535         log_dbg("Resuming volume %s.", name);
1536
1537         if (!isLUKS(cd->type)) {
1538                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1539                 r = -EINVAL;
1540                 goto out;
1541         }
1542
1543         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1544                             NULL, NULL, NULL, NULL, &suspended, NULL);
1545         if (r < 0)
1546                 return r;
1547
1548         if (!suspended) {
1549                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1550                 return -EINVAL;
1551         }
1552
1553         if (!keyfile)
1554                 return -EINVAL;
1555
1556         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1557                           &passphrase_size_read, keyfile, keyfile_size);
1558         if (r < 0)
1559                 goto out;
1560
1561         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1562                                    passphrase_size_read, &cd->hdr, &vk, cd);
1563         if (r < 0)
1564                 goto out;
1565
1566         keyslot = r;
1567         r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1568         if (r)
1569                 log_err(cd, "Error during resuming device %s.\n", name);
1570 out:
1571         crypt_safe_free(passphrase_read);
1572         crypt_free_volume_key(vk);
1573         return r < 0 ? r : keyslot;
1574 }
1575
1576 // slot manipulation
1577 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1578         int keyslot, // -1 any
1579         const char *passphrase, // NULL -> terminal
1580         size_t passphrase_size,
1581         const char *new_passphrase, // NULL -> terminal
1582         size_t new_passphrase_size)
1583 {
1584         struct volume_key *vk = NULL;
1585         char *password = NULL, *new_password = NULL;
1586         unsigned int passwordLen, new_passwordLen;
1587         int r;
1588
1589         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1590                 "new passphrase %sprovided.",
1591                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1592
1593         if (!isLUKS(cd->type)) {
1594                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1595                 return -EINVAL;
1596         }
1597
1598         r = keyslot_verify_or_find_empty(cd, &keyslot);
1599         if (r)
1600                 return r;
1601
1602         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1603                 /* No slots used, try to use pre-generated key in header */
1604                 if (cd->volume_key) {
1605                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1606                         r = vk ? 0 : -ENOMEM;
1607                 } else {
1608                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1609                         return -EINVAL;
1610                 }
1611         } else if (passphrase) {
1612                 /* Passphrase provided, use it to unlock existing keyslot */
1613                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1614                                            passphrase_size, &cd->hdr, &vk, cd);
1615         } else {
1616                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1617                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1618                                       &password, &passwordLen, 0);
1619                 if (r < 0)
1620                         goto out;
1621
1622                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1623                                            passwordLen, &cd->hdr, &vk, cd);
1624                 crypt_safe_free(password);
1625         }
1626
1627         if(r < 0)
1628                 goto out;
1629
1630         if (new_passphrase) {
1631                 new_password = (char *)new_passphrase;
1632                 new_passwordLen = new_passphrase_size;
1633         } else {
1634                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1635                                       &new_password, &new_passwordLen, 1);
1636                 if(r < 0)
1637                         goto out;
1638         }
1639
1640         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1641                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1642         if(r < 0) goto out;
1643
1644         r = 0;
1645 out:
1646         if (!new_passphrase)
1647                 crypt_safe_free(new_password);
1648         crypt_free_volume_key(vk);
1649         return r ?: keyslot;
1650 }
1651
1652 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1653         int keyslot,
1654         const char *keyfile,
1655         size_t keyfile_size,
1656         const char *new_keyfile,
1657         size_t new_keyfile_size)
1658 {
1659         struct volume_key *vk = NULL;
1660         char *password = NULL; unsigned int passwordLen;
1661         char *new_password = NULL; unsigned int new_passwordLen;
1662         int r;
1663
1664         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1665                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1666
1667         if (!isLUKS(cd->type)) {
1668                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1669                 return -EINVAL;
1670         }
1671
1672         r = keyslot_verify_or_find_empty(cd, &keyslot);
1673         if (r)
1674                 return r;
1675
1676         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1677                 /* No slots used, try to use pre-generated key in header */
1678                 if (cd->volume_key) {
1679                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1680                         r = vk ? 0 : -ENOMEM;
1681                 } else {
1682                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1683                         return -EINVAL;
1684                 }
1685         } else {
1686                 /* Read password from file of (if NULL) from terminal */
1687                 if (keyfile)
1688                         r = key_from_file(cd, _("Enter any passphrase: "),
1689                                           &password, &passwordLen,
1690                                           keyfile, keyfile_size);
1691                 else
1692                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1693                                               &password, &passwordLen, 0);
1694                 if (r < 0)
1695                         goto out;
1696
1697                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1698                                            &cd->hdr, &vk, cd);
1699         }
1700
1701         if(r < 0)
1702                 goto out;
1703
1704         if (new_keyfile)
1705                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1706                                   &new_password, &new_passwordLen, new_keyfile,
1707                                   new_keyfile_size);
1708         else
1709                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1710                                       &new_password, &new_passwordLen, 1);
1711         if (r < 0)
1712                 goto out;
1713
1714         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1715                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1716 out:
1717         crypt_safe_free(password);
1718         crypt_safe_free(new_password);
1719         crypt_free_volume_key(vk);
1720         return r < 0 ? r : keyslot;
1721 }
1722
1723 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1724         int keyslot,
1725         const char *volume_key,
1726         size_t volume_key_size,
1727         const char *passphrase,
1728         size_t passphrase_size)
1729 {
1730         struct volume_key *vk = NULL;
1731         int r = -EINVAL;
1732         char *new_password = NULL; unsigned int new_passwordLen;
1733
1734         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1735
1736         if (!isLUKS(cd->type)) {
1737                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1738                 return -EINVAL;
1739         }
1740
1741         if (volume_key)
1742                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1743         else if (cd->volume_key)
1744                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1745
1746         if (!vk)
1747                 return -ENOMEM;
1748
1749         r = LUKS_verify_volume_key(&cd->hdr, vk);
1750         if (r < 0) {
1751                 log_err(cd, _("Volume key does not match the volume.\n"));
1752                 goto out;
1753         }
1754
1755         r = keyslot_verify_or_find_empty(cd, &keyslot);
1756         if (r)
1757                 goto out;
1758
1759         if (!passphrase) {
1760                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1761                                       &new_password, &new_passwordLen, 1);
1762                 if (r < 0)
1763                         goto out;
1764                 passphrase = new_password;
1765                 passphrase_size = new_passwordLen;
1766         }
1767
1768         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1769                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1770 out:
1771         crypt_safe_free(new_password);
1772         crypt_free_volume_key(vk);
1773         return (r < 0) ? r : keyslot;
1774 }
1775
1776 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1777 {
1778         crypt_keyslot_info ki;
1779
1780         log_dbg("Destroying keyslot %d.", keyslot);
1781
1782         if (!isLUKS(cd->type)) {
1783                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1784                 return -EINVAL;
1785         }
1786
1787         ki = crypt_keyslot_status(cd, keyslot);
1788         if (ki == CRYPT_SLOT_INVALID) {
1789                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1790                 return -EINVAL;
1791         }
1792
1793         if (ki == CRYPT_SLOT_INACTIVE) {
1794                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1795                 return -EINVAL;
1796         }
1797
1798         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1799 }
1800
1801 // activation/deactivation of device mapping
1802 int crypt_activate_by_passphrase(struct crypt_device *cd,
1803         const char *name,
1804         int keyslot,
1805         const char *passphrase,
1806         size_t passphrase_size,
1807         uint32_t flags)
1808 {
1809         crypt_status_info ci;
1810         struct volume_key *vk = NULL;
1811         char *read_passphrase = NULL;
1812         unsigned int passphraseLen = 0;
1813         int r;
1814
1815         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1816                 name ? "Activating" : "Checking", name ?: "",
1817                 keyslot, passphrase ? "" : "[none] ");
1818
1819         if (name) {
1820                 ci = crypt_status(NULL, name);
1821                 if (ci == CRYPT_INVALID)
1822                         return -EINVAL;
1823                 else if (ci >= CRYPT_ACTIVE) {
1824                         log_err(cd, _("Device %s already exists.\n"), name);
1825                         return -EEXIST;
1826                 }
1827         }
1828
1829         /* plain, use hashed passphrase */
1830         if (isPLAIN(cd->type)) {
1831                 if (!passphrase) {
1832                         r = key_from_terminal(cd, NULL, &read_passphrase,
1833                                               &passphraseLen, 0);
1834                         if (r < 0)
1835                                 goto out;
1836                         passphrase = read_passphrase;
1837                         passphrase_size = passphraseLen;
1838                 }
1839                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1840                                          cd->plain_cipher, cd->plain_cipher_mode,
1841                                          NULL, passphrase, passphrase_size,
1842                                          cd->volume_key->keylength, 0,
1843                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
1844                                          cd->plain_uuid,
1845                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1846                 keyslot = 0;
1847         } else if (isLUKS(cd->type)) {
1848                 /* provided passphrase, do not retry */
1849                 if (passphrase) {
1850                         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1851                                                    passphrase_size, &cd->hdr, &vk, cd);
1852                 } else
1853                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1854
1855                 if (r >= 0) {
1856                         keyslot = r;
1857                         if (name)
1858                                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1859                 }
1860         } else
1861                 r = -EINVAL;
1862 out:
1863         crypt_safe_free(read_passphrase);
1864         crypt_free_volume_key(vk);
1865
1866         return r < 0  ? r : keyslot;
1867 }
1868
1869 int crypt_activate_by_keyfile(struct crypt_device *cd,
1870         const char *name,
1871         int keyslot,
1872         const char *keyfile,
1873         size_t keyfile_size,
1874         uint32_t flags)
1875 {
1876         crypt_status_info ci;
1877         struct volume_key *vk = NULL;
1878         char *passphrase_read = NULL;
1879         unsigned int passphrase_size_read, key_count = 0;
1880         int r;
1881
1882         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1883                 name ?: "", keyslot, keyfile ?: "[none]");
1884
1885         if (name) {
1886                 ci = crypt_status(NULL, name);
1887                 if (ci == CRYPT_INVALID)
1888                         return -EINVAL;
1889                 else if (ci >= CRYPT_ACTIVE) {
1890                         log_err(cd, _("Device %s already exists.\n"), name);
1891                         return -EEXIST;
1892                 }
1893         }
1894
1895         if (!keyfile)
1896                 return -EINVAL;
1897
1898         if (isPLAIN(cd->type)) {
1899                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1900                                   &passphrase_size_read, keyfile, keyfile_size);
1901                 if (r < 0)
1902                         goto out;
1903                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1904                                          cd->plain_cipher, cd->plain_cipher_mode,
1905                                          NULL, passphrase_read, passphrase_size_read,
1906                                          cd->volume_key->keylength, 0,
1907                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
1908                                          cd->plain_uuid,
1909                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1910         } else if (isLUKS(cd->type)) {
1911                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1912                           &passphrase_size_read, keyfile, keyfile_size);
1913                 if (r < 0)
1914                         goto out;
1915                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1916                                            passphrase_size_read, &cd->hdr, &vk, cd);
1917                 if (r < 0)
1918                         goto out;
1919                 keyslot = r;
1920
1921                 if (name) {
1922                         r = open_from_hdr_and_vk(cd, vk, name, flags);
1923                         if (r < 0)
1924                                 goto out;
1925                 }
1926                 r = keyslot;
1927         } else if (isLOOPAES(cd->type)) {
1928                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
1929                                   keyfile, LOOPAES_KEYFILE_MAXSIZE);
1930                 if (r < 0)
1931                         goto out;
1932                 r = LOOPAES_parse_keyfile(cd, &vk, &key_count,
1933                                           passphrase_read, passphrase_size_read);
1934                 if (r < 0)
1935                         goto out;
1936                 if (name)
1937                         r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
1938                                              key_count, vk, flags);
1939         } else
1940                 r = -EINVAL;
1941
1942 out:
1943         crypt_safe_free(passphrase_read);
1944         crypt_free_volume_key(vk);
1945
1946         return r;
1947 }
1948
1949 int crypt_activate_by_volume_key(struct crypt_device *cd,
1950         const char *name,
1951         const char *volume_key,
1952         size_t volume_key_size,
1953         uint32_t flags)
1954 {
1955         crypt_status_info ci;
1956         struct volume_key *vk;
1957         int r;
1958
1959         log_dbg("Activating volume %s by volume key.", name);
1960
1961         /* use key directly, no hash */
1962         if (isPLAIN(cd->type)) {
1963                 if (!volume_key || !volume_key_size || !cd->volume_key ||
1964                         volume_key_size != cd->volume_key->keylength) {
1965                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
1966                         return -EINVAL;
1967                 }
1968
1969                 return create_device_helper(cd, name, NULL,
1970                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1971                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
1972                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1973         }
1974
1975         if (!isLUKS(cd->type)) {
1976                 log_err(cd, _("Device type is not properly initialised.\n"));
1977                 return -EINVAL;
1978         }
1979
1980         if (name) {
1981                 ci = crypt_status(NULL, name);
1982                 if (ci == CRYPT_INVALID)
1983                         return -EINVAL;
1984                 else if (ci >= CRYPT_ACTIVE) {
1985                         log_err(cd, _("Device %s already exists.\n"), name);
1986                         return -EEXIST;
1987                 }
1988         }
1989
1990         /* If key is not provided, try to use internal key */
1991         if (!volume_key) {
1992                 if (!cd->volume_key) {
1993                         log_err(cd, _("Volume key does not match the volume.\n"));
1994                         return -EINVAL;
1995                 }
1996                 volume_key_size = cd->volume_key->keylength;
1997                 volume_key = cd->volume_key->key;
1998         }
1999
2000         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2001         if (!vk)
2002                 return -ENOMEM;
2003         r = LUKS_verify_volume_key(&cd->hdr, vk);
2004
2005         if (r == -EPERM)
2006                 log_err(cd, _("Volume key does not match the volume.\n"));
2007
2008         if (!r && name)
2009                 r = open_from_hdr_and_vk(cd, vk, name, flags);
2010
2011         crypt_free_volume_key(vk);
2012
2013         return r;
2014 }
2015
2016 int crypt_deactivate(struct crypt_device *cd, const char *name)
2017 {
2018         int r;
2019
2020         if (!name)
2021                 return -EINVAL;
2022
2023         log_dbg("Deactivating volume %s.", name);
2024
2025         if (!cd && dm_init(NULL, 1) < 0)
2026                 return -ENOSYS;
2027
2028         switch (crypt_status(cd, name)) {
2029                 case CRYPT_ACTIVE:
2030                         r = dm_remove_device(name, 0, 0);
2031                         break;
2032                 case CRYPT_BUSY:
2033                         log_err(cd, _("Device %s is busy.\n"), name);
2034                         r = -EBUSY;
2035                         break;
2036                 case CRYPT_INACTIVE:
2037                         log_err(cd, _("Device %s is not active.\n"), name);
2038                         r = -ENODEV;
2039                         break;
2040                 default:
2041                         log_err(cd, _("Invalid device %s.\n"), name);
2042                         r = -EINVAL;
2043         }
2044
2045         if (!cd)
2046                 dm_exit();
2047
2048         return r;
2049 }
2050
2051 int crypt_volume_key_get(struct crypt_device *cd,
2052         int keyslot,
2053         char *volume_key,
2054         size_t *volume_key_size,
2055         const char *passphrase,
2056         size_t passphrase_size)
2057 {
2058         struct volume_key *vk;
2059         char *processed_key = NULL;
2060         int r, key_len;
2061
2062         key_len = crypt_get_volume_key_size(cd);
2063         if (key_len > *volume_key_size) {
2064                 log_err(cd, _("Volume key buffer too small.\n"));
2065                 return -ENOMEM;
2066         }
2067
2068         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2069                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
2070                                             passphrase, passphrase_size);
2071                 if (!processed_key) {
2072                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2073                         return -EINVAL;
2074                 }
2075                 memcpy(volume_key, processed_key, key_len);
2076                 *volume_key_size = key_len;
2077                 crypt_safe_free(processed_key);
2078                 return 0;
2079         }
2080
2081         if (isLUKS(cd->type)) {
2082                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
2083                                         passphrase_size, &cd->hdr, &vk, cd);
2084
2085                 if (r >= 0) {
2086                         memcpy(volume_key, vk->key, vk->keylength);
2087                         *volume_key_size = vk->keylength;
2088                 }
2089
2090                 crypt_free_volume_key(vk);
2091                 return r;
2092         }
2093
2094         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2095         return -EINVAL;
2096 }
2097
2098 int crypt_volume_key_verify(struct crypt_device *cd,
2099         const char *volume_key,
2100         size_t volume_key_size)
2101 {
2102         struct volume_key *vk;
2103         int r;
2104
2105         if (!isLUKS(cd->type)) {
2106                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2107                 return -EINVAL;
2108         }
2109
2110         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2111         if (!vk)
2112                 return -ENOMEM;
2113
2114         r = LUKS_verify_volume_key(&cd->hdr, vk);
2115
2116         if (r == -EPERM)
2117                 log_err(cd, _("Volume key does not match the volume.\n"));
2118
2119         crypt_free_volume_key(vk);
2120
2121         return r;
2122 }
2123
2124 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2125 {
2126         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2127         cd->timeout = timeout_sec;
2128 }
2129
2130 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2131 {
2132         log_dbg("Password retry count set to %d.", tries);
2133         cd->tries = tries;
2134 }
2135
2136 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2137 {
2138         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2139         cd->iteration_time = iteration_time_ms;
2140 }
2141
2142 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2143 {
2144         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2145         cd->password_verify = password_verify ? 1 : 0;
2146 }
2147
2148 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2149 {
2150         switch (rng_type) {
2151         case CRYPT_RNG_URANDOM:
2152         case CRYPT_RNG_RANDOM:
2153                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2154                 cd->rng_type = rng_type;
2155         }
2156 }
2157
2158 int crypt_get_rng_type(struct crypt_device *cd)
2159 {
2160         if (!cd)
2161                 return -EINVAL;
2162
2163         return cd->rng_type;
2164 }
2165
2166 int crypt_memory_lock(struct crypt_device *cd, int lock)
2167 {
2168         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2169 }
2170
2171 // reporting
2172 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2173 {
2174         int r;
2175
2176         if (!cd && dm_init(NULL, 1) < 0)
2177                 return CRYPT_INVALID;
2178
2179         r = dm_status_device(name);
2180
2181         if (!cd)
2182                 dm_exit();
2183
2184         if (r < 0 && r != -ENODEV)
2185                 return CRYPT_INVALID;
2186
2187         if (r == 0)
2188                 return CRYPT_ACTIVE;
2189
2190         if (r > 0)
2191                 return CRYPT_BUSY;
2192
2193         return CRYPT_INACTIVE;
2194 }
2195
2196 static void hexprintICB(struct crypt_device *cd, char *d, int n)
2197 {
2198         int i;
2199         for(i = 0; i < n; i++)
2200                 log_std(cd, "%02hhx ", (char)d[i]);
2201 }
2202
2203 int crypt_dump(struct crypt_device *cd)
2204 {
2205         int i;
2206         if (!isLUKS(cd->type)) { //FIXME
2207                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2208                 return -EINVAL;
2209         }
2210
2211         log_std(cd, "LUKS header information for %s\n\n", cd->device);
2212         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2213         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2214         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2215         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2216         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2217         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2218         log_std(cd, "MK digest:     \t");
2219         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
2220         log_std(cd, "\n");
2221         log_std(cd, "MK salt:       \t");
2222         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
2223         log_std(cd, "\n               \t");
2224         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2225         log_std(cd, "\n");
2226         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2227         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2228         for(i = 0; i < LUKS_NUMKEYS; i++) {
2229                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2230                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2231                         log_std(cd, "\tIterations:         \t%d\n",
2232                                 cd->hdr.keyblock[i].passwordIterations);
2233                         log_std(cd, "\tSalt:               \t");
2234                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2235                                     LUKS_SALTSIZE/2);
2236                         log_std(cd, "\n\t                      \t");
2237                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2238                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2239                         log_std(cd, "\n");
2240
2241                         log_std(cd, "\tKey material offset:\t%d\n",
2242                                 cd->hdr.keyblock[i].keyMaterialOffset);
2243                         log_std(cd, "\tAF stripes:            \t%d\n",
2244                                 cd->hdr.keyblock[i].stripes);
2245                 }
2246                 else
2247                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2248         }
2249
2250         return 0;
2251 }
2252
2253 const char *crypt_get_cipher(struct crypt_device *cd)
2254 {
2255         if (isPLAIN(cd->type))
2256                 return cd->plain_cipher;
2257
2258         if (isLUKS(cd->type))
2259                 return cd->hdr.cipherName;
2260
2261         if (isLOOPAES(cd->type))
2262                 return cd->loopaes_cipher;
2263
2264         return NULL;
2265 }
2266
2267 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2268 {
2269         if (isPLAIN(cd->type))
2270                 return cd->plain_cipher_mode;
2271
2272         if (isLUKS(cd->type))
2273                 return cd->hdr.cipherMode;
2274
2275         if (isLOOPAES(cd->type))
2276                 return cd->loopaes_cipher_mode;
2277
2278         return NULL;
2279 }
2280
2281 const char *crypt_get_uuid(struct crypt_device *cd)
2282 {
2283         if (isLUKS(cd->type))
2284                 return cd->hdr.uuid;
2285
2286         if (isPLAIN(cd->type))
2287                 return cd->plain_uuid;
2288
2289         if (isLOOPAES(cd->type))
2290                 return cd->loopaes_uuid;
2291
2292         return NULL;
2293 }
2294
2295 const char *crypt_get_device_name(struct crypt_device *cd)
2296 {
2297         return cd->device;
2298 }
2299
2300 int crypt_get_volume_key_size(struct crypt_device *cd)
2301 {
2302         if (isPLAIN(cd->type) && cd->volume_key)
2303                 return cd->volume_key->keylength;
2304
2305         if (isLUKS(cd->type))
2306                 return cd->hdr.keyBytes;
2307
2308         if (isLOOPAES(cd->type))
2309                 return cd->loopaes_key_size;
2310
2311         return 0;
2312 }
2313
2314 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2315 {
2316         if (isPLAIN(cd->type))
2317                 return cd->plain_hdr.offset;
2318
2319         if (isLUKS(cd->type))
2320                 return cd->hdr.payloadOffset;
2321
2322         if (isLOOPAES(cd->type))
2323                 return cd->loopaes_hdr.offset;
2324
2325         return 0;
2326 }
2327
2328 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2329 {
2330         if (!isLUKS(cd->type)) {
2331                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2332                 return CRYPT_SLOT_INVALID;
2333         }
2334
2335         return LUKS_keyslot_info(&cd->hdr, keyslot);
2336 }
2337
2338 int crypt_keyslot_max(const char *type)
2339 {
2340         if (type && isLUKS(type))
2341                 return LUKS_NUMKEYS;
2342
2343         return -EINVAL;
2344 }
2345
2346 const char *crypt_get_type(struct crypt_device *cd)
2347 {
2348         return cd->type;
2349 }
2350
2351 int crypt_get_active_device(struct crypt_device *cd,
2352                             const char *name,
2353                             struct crypt_active_device *cad)
2354 {
2355         int r, readonly;
2356
2357         r = dm_query_device(name, NULL, &cad->size, &cad->iv_offset, &cad->offset,
2358                             NULL, NULL, NULL, &readonly, NULL, NULL);
2359         if (r < 0)
2360                 return r;
2361
2362         cad->flags = readonly ? CRYPT_ACTIVATE_READONLY : 0;
2363
2364         return 0;
2365 }