lib/setup.c

   1 #include <string.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include <fcntl.h>
   6 #include <errno.h>
   7
   8 #include "libcryptsetup.h"
   9 #include "luks.h"
  10 #include "internal.h"
  11
  12 struct crypt_device {
  13         char *type;
  14
  15         char *device;
  16         struct volume_key *volume_key;
  17         uint64_t timeout;
  18         uint64_t iteration_time;
  19         int tries;
  20         int password_verify;
  21         int rng_type;
  22
  23         /* used in CRYPT_LUKS1 */
  24         struct luks_phdr hdr;
  25         uint64_t PBKDF2_per_sec;
  26
  27         /* used in CRYPT_PLAIN */
  28         struct crypt_params_plain plain_hdr;
  29         char *plain_cipher;
  30         char *plain_cipher_mode;
  31         char *plain_uuid;
  32
  33         /* callbacks definitions */
  34         void (*log)(int level, const char *msg, void *usrptr);
  35         void *log_usrptr;
  36         int (*confirm)(const char *msg, void *usrptr);
  37         void *confirm_usrptr;
  38         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  39         void *password_usrptr;
  40 };
  41
  42 /* Log helper */
  43 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
  44 static int _debug_level = 0;
  45
  46 void crypt_set_debug_level(int level)
  47 {
  48         _debug_level = level;
  49 }
  50
  51 int crypt_get_debug_level()
  52 {
  53         return _debug_level;
  54 }
  55
  56 void crypt_log(struct crypt_device *cd, int level, const char *msg)
  57 {
  58         if (cd && cd->log)
  59                 cd->log(level, msg, cd->log_usrptr);
  60         else if (_default_log)
  61                 _default_log(level, msg, NULL);
  62 }
  63
  64 void logger(struct crypt_device *cd, int level, const char *file,
  65             int line, const char *format, ...)
  66 {
  67         va_list argp;
  68         char *target = NULL;
  69
  70         va_start(argp, format);
  71
  72         if (vasprintf(&target, format, argp) > 0) {
  73                 if (level >= 0) {
  74                         crypt_log(cd, level, target);
  75 #ifdef CRYPT_DEBUG
  76                 } else if (_debug_level)
  77                         printf("# %s:%d %s\n", file ?: "?", line, target);
  78 #else
  79                 } else if (_debug_level)
  80                         printf("# %s\n", target);
  81 #endif
  82         }
  83
  84         va_end(argp);
  85         free(target);
  86 }
  87
  88 /*
  89  * Password processing behaviour matrix of process_key
  90  *
  91  * from binary file: check if there is sufficently large key material
  92  * interactive & from fd: hash if requested, otherwise crop or pad with '0'
  93  */
  94 static char *process_key(struct crypt_device *cd, const char *hash_name,
  95                          const char *key_file, size_t key_size,
  96                          const char *pass, size_t passLen)
  97 {
  98         char *key;
  99
 100         if (!key_size)
 101                 return NULL;
 102
 103         key = crypt_safe_alloc(key_size);
 104         memset(key, 0, key_size);
 105
 106         /* key is coming from binary file */
 107         if (key_file && strcmp(key_file, "-")) {
 108                 if(passLen < key_size) {
 109                         log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
 110                                 key_size, key_file);
 111                         crypt_safe_free(key);
 112                         return NULL;
 113                 }
 114                 memcpy(key, pass, key_size);
 115                 return key;
 116         }
 117
 118         /* key is coming from tty, fd or binary stdin */
 119         if (hash_name) {
 120                 if (hash(NULL, hash_name, key, key_size, pass, passLen) < 0) {
 121                         log_err(cd, _("Key processing error (using hash algorithm %s).\n"),
 122                                 hash_name);
 123                         crypt_safe_free(key);
 124                         return NULL;
 125                 }
 126         } else if (passLen > key_size) {
 127                 memcpy(key, pass, key_size);
 128         } else {
 129                 memcpy(key, pass, passLen);
 130         }
 131
 132         return key;
 133 }
 134
 135 static int isPLAIN(const char *type)
 136 {
 137         return (type && !strcmp(CRYPT_PLAIN, type));
 138 }
 139
 140 static int isLUKS(const char *type)
 141 {
 142         return (type && !strcmp(CRYPT_LUKS1, type));
 143 }
 144
 145 /* keyslot helpers */
 146 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 147 {
 148         if (*keyslot == CRYPT_ANY_SLOT) {
 149                 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
 150                 if (*keyslot < 0) {
 151                         log_err(cd, _("All key slots full.\n"));
 152                         return -EINVAL;
 153                 }
 154         }
 155
 156         switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
 157                 case CRYPT_SLOT_INVALID:
 158                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 159                                 *keyslot, LUKS_NUMKEYS - 1);
 160                         return -EINVAL;
 161                 case CRYPT_SLOT_INACTIVE:
 162                         break;
 163                 default:
 164                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 165                                 *keyslot);
 166                         return -EINVAL;
 167         }
 168
 169         return 0;
 170 }
 171
 172 static int verify_other_keyslot(struct crypt_device *cd,
 173                                 const char *key_file,
 174                                 int keyIndex)
 175 {
 176         struct volume_key *vk = NULL;
 177         crypt_keyslot_info ki;
 178         int openedIndex, r;
 179         char *password = NULL;
 180         unsigned int passwordLen;
 181
 182         r = crypt_get_key(_("Enter any remaining LUKS passphrase: "),
 183                           &password, &passwordLen, 0, key_file, cd->timeout,
 184                           cd->password_verify, cd);
 185         if(r < 0)
 186                 goto out;
 187
 188         ki = crypt_keyslot_status(cd, keyIndex);
 189         if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */
 190                 LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
 191
 192         openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
 193                                              password, passwordLen,
 194                                              &cd->hdr, &vk, cd);
 195
 196         if (ki == CRYPT_SLOT_ACTIVE)
 197                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 198
 199         if (openedIndex < 0)
 200                 r = -EPERM;
 201         else
 202                 log_verbose(cd, _("Key slot %d verified.\n"), openedIndex);
 203 out:
 204         crypt_free_volume_key(vk);
 205         crypt_safe_free(password);
 206         return r;
 207 }
 208
 209 static int find_keyslot_by_passphrase(struct crypt_device *cd,
 210                                       const char *key_file,
 211                                       char *message)
 212 {
 213         struct volume_key *vk = NULL;
 214         char *password = NULL;
 215         unsigned int passwordLen;
 216         int r;
 217
 218         r = crypt_get_key(message,&password,&passwordLen, 0, key_file,
 219                           cd->timeout, cd->password_verify, cd);
 220         if (r < 0)
 221                 goto out;
 222
 223         r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
 224                                    passwordLen, &cd->hdr, &vk, cd);
 225 out:
 226         crypt_free_volume_key(vk);
 227         crypt_safe_free(password);
 228         return r;
 229 }
 230
 231 static int device_check_and_adjust(struct crypt_device *cd,
 232                                    const char *device,
 233                                    int open_exclusive,
 234                                    uint64_t *size,
 235                                    uint64_t *offset,
 236                                    int *read_only)
 237 {
 238         int r, real_readonly;
 239         uint64_t real_size;
 240
 241         if (!device)
 242                 return -ENOTBLK;
 243
 244         r = get_device_infos(device, open_exclusive, &real_readonly, &real_size);
 245         if (r < 0) {
 246                 if (r == -EBUSY)
 247                         log_err(cd, _("Cannot use device %s which is in use "
 248                                       "(already mapped or mounted).\n"),
 249                                       device);
 250                 else
 251                         log_err(cd, _("Cannot get info about device %s.\n"),
 252                                 device);
 253                 return r;
 254         }
 255
 256         if (!*size) {
 257                 *size = real_size;
 258                 if (!*size) {
 259                         log_err(cd, _("Device %s has zero size.\n"), device);
 260                         return -ENOTBLK;
 261                 }
 262                 if (*size < *offset) {
 263                         log_err(cd, _("Device %s is too small.\n"), device);
 264                         return -EINVAL;
 265                 }
 266                 *size -= *offset;
 267         }
 268
 269         if (real_readonly)
 270                 *read_only = 1;
 271
 272         log_dbg("Calculated device size is %" PRIu64 " sectors (%s), offset %" PRIu64 ".",
 273                 *size, *read_only ? "RO" : "RW", *offset);
 274         return 0;
 275 }
 276
 277 static int luks_remove_helper(struct crypt_device *cd,
 278                               int key_slot,
 279                               const char *other_key_file,
 280                               const char *key_file,
 281                               int verify)
 282 {
 283         crypt_keyslot_info ki;
 284         int r = -EINVAL;
 285
 286         if (key_slot == CRYPT_ANY_SLOT) {
 287                 key_slot = find_keyslot_by_passphrase(cd, key_file,
 288                                 _("Enter LUKS passphrase to be deleted: "));
 289                 if(key_slot < 0) {
 290                         r = -EPERM;
 291                         goto out;
 292                 }
 293
 294                 log_std(cd, _("Key slot %d selected for deletion.\n"), key_slot);
 295         }
 296
 297         ki = crypt_keyslot_status(cd, key_slot);
 298         if (ki == CRYPT_SLOT_INVALID) {
 299                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 300                         key_slot, LUKS_NUMKEYS - 1);
 301                 r = -EINVAL;
 302                 goto out;
 303         }
 304         if (ki <= CRYPT_SLOT_INACTIVE) {
 305                 log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
 306                 r = -EINVAL;
 307                 goto out;
 308         }
 309
 310         if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm &&
 311             !(cd->confirm(_("This is the last keyslot."
 312                             " Device will become unusable after purging this key."),
 313                          cd->confirm_usrptr))) {
 314                 r = -EINVAL;
 315                 goto out;
 316         }
 317
 318         if(verify)
 319                 r = verify_other_keyslot(cd, other_key_file, key_slot);
 320         else
 321                 r = 0;
 322
 323         if (!r)
 324                 r = crypt_keyslot_destroy(cd, key_slot);
 325 out:
 326         return (r < 0) ? r : 0;
 327 }
 328
 329 static int create_device_helper(struct crypt_device *cd,
 330                                 const char *name,
 331                                 const char *hash,
 332                                 const char *cipher,
 333                                 const char *cipher_mode,
 334                                 const char *key_file,
 335                                 const char *key,
 336                                 unsigned int keyLen,
 337                                 int key_size,
 338                                 uint64_t size,
 339                                 uint64_t skip,
 340                                 uint64_t offset,
 341                                 const char *uuid,
 342                                 int read_only,
 343                                 unsigned int flags,
 344                                 int reload)
 345 {
 346         crypt_status_info ci;
 347         char *dm_cipher = NULL;
 348         char *processed_key = NULL;
 349         int r;
 350
 351         if (!name)
 352                 return -EINVAL;
 353
 354         ci = crypt_status(cd, name);
 355         if (ci == CRYPT_INVALID)
 356                 return -EINVAL;
 357
 358         if (reload && ci < CRYPT_ACTIVE)
 359                 return -EINVAL;
 360
 361         if (!reload && ci >= CRYPT_ACTIVE) {
 362                 log_err(cd, _("Device %s already exists.\n"), name);
 363                 return -EEXIST;
 364         }
 365
 366         if (key_size < 0 || key_size > 1024) {
 367                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 368                 return -EINVAL;
 369         }
 370
 371         r = device_check_and_adjust(cd, cd->device, !reload, &size, &offset, &read_only);
 372         if (r)
 373                 return r;
 374
 375         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 376                 return -ENOMEM;
 377
 378         processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
 379         if (!processed_key) {
 380                 r = -ENOENT;
 381                 goto out;
 382         }
 383
 384         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 385                              key_size, processed_key, read_only, reload);
 386 out:
 387         free(dm_cipher);
 388         crypt_safe_free(processed_key);
 389         return r;
 390 }
 391
 392 static int open_from_hdr_and_vk(struct crypt_device *cd,
 393                                 struct volume_key *vk,
 394                                 const char *name,
 395                                 uint32_t flags)
 396 {
 397         uint64_t size, offset;
 398         char *cipher;
 399         int read_only, no_uuid, r;
 400
 401         size = 0;
 402         offset = crypt_get_data_offset(cd);
 403         read_only = flags & CRYPT_ACTIVATE_READONLY;
 404         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 405
 406         r = device_check_and_adjust(cd, cd->device, 1, &size, &offset, &read_only);
 407         if (r)
 408                 return r;
 409
 410         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 411                      crypt_get_cipher_mode(cd)) < 0)
 412                 r = -ENOMEM;
 413         else
 414                 r = dm_create_device(name, cd->device, cipher, cd->type,
 415                                      no_uuid ? NULL : crypt_get_uuid(cd),
 416                                      size, 0, offset, vk->keylength, vk->key,
 417                                      read_only, 0);
 418         free(cipher);
 419         return r;
 420 }
 421
 422 static void log_wrapper(int level, const char *msg, void *usrptr)
 423 {
 424         void (*xlog)(int level, char *msg) = usrptr;
 425         xlog(level, (char *)msg);
 426 }
 427
 428 static int yesDialog_wrapper(const char *msg, void *usrptr)
 429 {
 430         int (*xyesDialog)(char *msg) = usrptr;
 431         return xyesDialog((char*)msg);
 432 }
 433
 434 int crypt_confirm(struct crypt_device *cd, const char *msg)
 435 {
 436         if (!cd || !cd->confirm)
 437                 return 1;
 438         else
 439                 return cd->confirm(msg, cd->confirm_usrptr);
 440 }
 441
 442 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 443                               unsigned int *key_len, int force_verify)
 444 {
 445         char *prompt = NULL;
 446         int r;
 447
 448         *key = NULL;
 449         if(!msg && asprintf(&prompt, _("Enter passphrase for %s: "),
 450                             cd->device) < 0)
 451                 return -ENOMEM;
 452
 453         if (!msg)
 454                 msg = prompt;
 455
 456         if (cd->password) {
 457                 *key = crypt_safe_alloc(MAX_TTY_PASSWORD_LEN);
 458                 if (!*key) {
 459                         r = -ENOMEM;
 460                         goto out;
 461                 }
 462                 r = cd->password(msg, *key, MAX_TTY_PASSWORD_LEN, cd->password_usrptr);
 463                 if (r < 0) {
 464                         crypt_safe_free(*key);
 465                         *key = NULL;
 466                 } else
 467                         *key_len = r;
 468         } else
 469                 r = crypt_get_key(msg, key, key_len, 0, NULL, cd->timeout,
 470                                   (force_verify || cd->password_verify), cd);
 471 out:
 472         free(prompt);
 473         return (r < 0) ? r: 0;
 474 }
 475
 476 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 477                                              struct volume_key **vk)
 478 {
 479         char *passphrase_read = NULL;
 480         unsigned int passphrase_size_read;
 481         int r = -EINVAL, tries = cd->tries;
 482
 483         *vk = NULL;
 484         do {
 485                 crypt_free_volume_key(*vk);
 486                 *vk = NULL;
 487
 488                 r = key_from_terminal(cd, NULL, &passphrase_read,
 489                                       &passphrase_size_read, 0);
 490                 if(r < 0)
 491                         goto out;
 492
 493                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 494                                            passphrase_size_read, &cd->hdr, vk, cd);
 495                 crypt_safe_free(passphrase_read);
 496                 passphrase_read = NULL;
 497         } while (r == -EPERM && (--tries > 0));
 498 out:
 499         if (r < 0) {
 500                 crypt_free_volume_key(*vk);
 501                 *vk = NULL;
 502         }
 503
 504         crypt_safe_free(passphrase_read);
 505         return r;
 506 }
 507
 508 static int key_from_file(struct crypt_device *cd, char *msg,
 509                           char **key, unsigned int *key_len,
 510                           const char *key_file, size_t key_size)
 511 {
 512         return crypt_get_key(msg, key, key_len, key_size, key_file,
 513                              cd->timeout, 0, cd);
 514 }
 515
 516 static int _crypt_init(struct crypt_device **cd,
 517                        const char *type,
 518                        struct crypt_options *options,
 519                        int load, int need_dm)
 520 {
 521         int init_by_name, r;
 522
 523         /* if it is plain device and mapping table is being reloaded
 524         initialize it by name*/
 525         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 526
 527         /* Some of old API calls do not require DM in kernel,
 528            fake initialisation by initialise it with kernel_check disabled */
 529         if (!need_dm)
 530                 (void)dm_init(NULL, 0);
 531         if (init_by_name)
 532                 r = crypt_init_by_name(cd, options->name);
 533         else
 534                 r = crypt_init(cd, options->device);
 535         if (!need_dm)
 536                 dm_exit();
 537
 538         if (r)
 539                 return -EINVAL;
 540
 541         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 542         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 543
 544         crypt_set_timeout(*cd, options->timeout);
 545         crypt_set_password_retry(*cd, options->tries);
 546         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 547         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 548
 549         if (load && !init_by_name)
 550                 r = crypt_load(*cd, type, NULL);
 551
 552         if (!r && type && !(*cd)->type) {
 553                 (*cd)->type = strdup(type);
 554                 if (!(*cd)->type)
 555                         r = -ENOMEM;
 556         }
 557
 558         if (r)
 559                 crypt_free(*cd);
 560
 561         return r;
 562 }
 563
 564 void crypt_set_log_callback(struct crypt_device *cd,
 565         void (*log)(int level, const char *msg, void *usrptr),
 566         void *usrptr)
 567 {
 568         if (!cd)
 569                 _default_log = log;
 570         else {
 571                 cd->log = log;
 572                 cd->log_usrptr = usrptr;
 573         }
 574 }
 575
 576 void crypt_set_confirm_callback(struct crypt_device *cd,
 577         int (*confirm)(const char *msg, void *usrptr),
 578         void *usrptr)
 579 {
 580         cd->confirm = confirm;
 581         cd->confirm_usrptr = usrptr;
 582 }
 583
 584 void crypt_set_password_callback(struct crypt_device *cd,
 585         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 586         void *usrptr)
 587 {
 588         cd->password = password;
 589         cd->password_usrptr = usrptr;
 590 }
 591
 592 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 593  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 594  *          flags, icb */
 595 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 596 {
 597         struct crypt_device *cd = NULL;
 598         char *key = NULL;
 599         unsigned int keyLen;
 600         int r;
 601
 602         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 603         if (r)
 604                 return r;
 605
 606         r = crypt_get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 607                           options->key_file, cd->timeout, cd->password_verify, cd);
 608         if (!r)
 609                 r = create_device_helper(cd, options->name, options->hash,
 610                         options->cipher, NULL, options->key_file, key, keyLen,
 611                         options->key_size, options->size, options->skip,
 612                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 613                         options->flags, update);
 614
 615         crypt_safe_free(key);
 616         crypt_free(cd);
 617         return r;
 618 }
 619
 620 int crypt_create_device(struct crypt_options *options)
 621 {
 622         return crypt_create_and_update_device(options, 0);
 623 }
 624
 625 int crypt_update_device(struct crypt_options *options)
 626 {
 627         return crypt_create_and_update_device(options, 1);
 628 }
 629
 630 /* OPTIONS: name, size, icb */
 631 int crypt_resize_device(struct crypt_options *options)
 632 {
 633         struct crypt_device *cd = NULL;
 634         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 635         char *type = NULL;
 636         uint64_t size, skip, offset;
 637         int key_size, read_only, r;
 638
 639         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 640
 641         if (dm_init(NULL, 1) < 0)
 642                 return -ENOSYS;
 643
 644         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 645                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 646         if (r < 0) {
 647                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 648                 goto out;
 649         }
 650
 651         /* Try to determine type of device from UUID */
 652         type = CRYPT_PLAIN;
 653         if (uuid) {
 654                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 655                         type = CRYPT_PLAIN;
 656                         free (uuid);
 657                         uuid = NULL;
 658                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 659                         type = CRYPT_LUKS1;
 660         }
 661
 662         if (!options->device)
 663                 options->device = device;
 664
 665         r = _crypt_init(&cd, type, options, 1, 1);
 666         if (r)
 667                 goto out;
 668
 669         size = options->size;
 670         r = device_check_and_adjust(cd, device, 0, &size, &offset, &read_only);
 671         if (r)
 672                 goto out;
 673
 674         r = dm_create_device(options->name, device, cipher, type,
 675                              crypt_get_uuid(cd), size, skip, offset,
 676                              key_size, key, read_only, 1);
 677 out:
 678         crypt_safe_free(key);
 679         free(cipher);
 680         if (options->device == device)
 681                 options->device = NULL;
 682         free(device);
 683         free(uuid);
 684         crypt_free(cd);
 685         dm_exit();
 686         return r;
 687 }
 688
 689 /* OPTIONS: name, icb */
 690 int crypt_query_device(struct crypt_options *options)
 691 {
 692         int read_only, r;
 693
 694         log_dbg("Query device %s.", options->name);
 695
 696         if (dm_init(NULL, 1) < 0)
 697                 return -ENOSYS;
 698
 699         r = dm_status_device(options->name);
 700         if (r < 0)
 701                 goto out;
 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         if (r >= 0) {
 707                 if (read_only)
 708                         options->flags |= CRYPT_FLAG_READONLY;
 709
 710                 options->flags |= CRYPT_FLAG_FREE_DEVICE;
 711                 options->flags |= CRYPT_FLAG_FREE_CIPHER;
 712
 713                 r = 1;
 714         }
 715 out:
 716         if (r == -ENODEV)
 717                 r = 0;
 718
 719         dm_exit();
 720         return r;
 721 }
 722
 723 /* OPTIONS: name, icb */
 724 int crypt_remove_device(struct crypt_options *options)
 725 {
 726         struct crypt_device *cd = NULL;
 727         int r;
 728
 729         r = crypt_init_by_name(&cd, options->name);
 730         if (r == 0)
 731                 r = crypt_deactivate(cd, options->name);
 732
 733         crypt_free(cd);
 734         return r;
 735
 736 }
 737
 738 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 739  *          new_key_file, iteration_time, timeout, flags, icb */
 740 int crypt_luksFormat(struct crypt_options *options)
 741 {
 742         char cipherName[LUKS_CIPHERNAME_L];
 743         char cipherMode[LUKS_CIPHERMODE_L];
 744         char *password=NULL;
 745         unsigned int passwordLen;
 746         struct crypt_device *cd = NULL;
 747         struct crypt_params_luks1 cp = {
 748                 .hash = options->hash,
 749                 .data_alignment = options->align_payload
 750         };
 751         int r;
 752
 753         r = crypt_parse_name_and_mode(options->cipher, cipherName, cipherMode);
 754         if(r < 0) {
 755                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 756                 return r;
 757         }
 758
 759         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 760                 return r;
 761
 762         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 763                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 764                         options->key_slot, LUKS_NUMKEYS - 1);
 765                 r = -EINVAL;
 766                 goto out;
 767         }
 768
 769         r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 770                           options->new_key_file, cd->timeout, cd->password_verify, cd);
 771
 772         if(r < 0)
 773                 goto out;
 774
 775         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 776                          NULL, NULL, options->key_size, &cp);
 777         if (r < 0)
 778                 goto out;
 779
 780         /* Add keyslot using internally stored volume key generated during format */
 781         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 782                                             password, passwordLen);
 783 out:
 784         crypt_free(cd);
 785         crypt_safe_free(password);
 786         return (r < 0) ? r : 0;
 787 }
 788
 789 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 790 int crypt_luksOpen(struct crypt_options *options)
 791 {
 792         struct crypt_device *cd = NULL;
 793         uint32_t flags = 0;
 794         int r;
 795
 796         if (!options->name)
 797                 return -EINVAL;
 798
 799         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 800         if (r)
 801                 return r;
 802
 803         if (options->flags & CRYPT_FLAG_READONLY)
 804                 flags |= CRYPT_ACTIVATE_READONLY;
 805
 806         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 807                 flags |= CRYPT_ACTIVATE_NO_UUID;
 808
 809         if (options->key_file)
 810                 r = crypt_activate_by_keyfile(cd, options->name,
 811                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 812                         flags);
 813         else
 814                 r = crypt_activate_by_passphrase(cd, options->name,
 815                         CRYPT_ANY_SLOT, options->passphrase,
 816                         options->passphrase ? strlen(options->passphrase) : 0,
 817                         flags);
 818
 819         crypt_free(cd);
 820         return (r < 0) ? r : 0;
 821 }
 822
 823 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 824 int crypt_luksKillSlot(struct crypt_options *options)
 825 {
 826         struct crypt_device *cd = NULL;
 827         int r;
 828
 829         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 830         if (r)
 831                 return r;
 832
 833         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 834                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 835
 836         crypt_free(cd);
 837         return (r < 0) ? r : 0;
 838 }
 839
 840 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 841 int crypt_luksRemoveKey(struct crypt_options *options)
 842 {
 843         struct crypt_device *cd = NULL;
 844         int r;
 845
 846         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 847         if (r)
 848                 return r;
 849
 850         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 851                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 852
 853         crypt_free(cd);
 854         return (r < 0) ? r : 0;
 855 }
 856
 857
 858 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 859             iteration_time, timeout, icb */
 860 int crypt_luksAddKey(struct crypt_options *options)
 861 {
 862         struct crypt_device *cd = NULL;
 863         int r = -EINVAL;
 864
 865         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 866         if (r)
 867                 return r;
 868
 869         if (options->key_file || options->new_key_file)
 870                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 871                                                  options->key_file, 0,
 872                                                  options->new_key_file, 0);
 873         else
 874                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 875                                                     NULL, 0, NULL, 0);
 876
 877         crypt_free(cd);
 878         return (r < 0) ? r : 0;
 879 }
 880
 881 /* OPTIONS: device, icb */
 882 int crypt_luksUUID(struct crypt_options *options)
 883 {
 884         struct crypt_device *cd = NULL;
 885         char *uuid;
 886         int r;
 887
 888         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 889         if (r)
 890                 return r;
 891
 892         uuid = (char *)crypt_get_uuid(cd);
 893         log_std(cd, uuid ?: "");
 894         log_std(cd, "\n");
 895         crypt_free(cd);
 896         return 0;
 897 }
 898
 899 /* OPTIONS: device, icb */
 900 int crypt_isLuks(struct crypt_options *options)
 901 {
 902         struct crypt_device *cd = NULL;
 903         int r;
 904
 905         log_dbg("Check device %s for LUKS header.", options->device);
 906
 907         r = init_crypto(cd);
 908         if (r < 0)
 909                 return r;
 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         h->rng_type = crypt_random_default_key_rng();
1011         *cd = h;
1012         return 0;
1013 }
1014
1015 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1016 {
1017         crypt_status_info ci;
1018         struct crypt_active_device cad;
1019         char *device = NULL, *cipher_full = NULL, *device_uuid = NULL;
1020         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
1021         char *key = NULL;
1022         int key_size = 0, r;
1023
1024
1025         log_dbg("Allocating crypt device context by device %s.", name);
1026
1027         ci = crypt_status(NULL, name);
1028         if (ci == CRYPT_INVALID)
1029                 return -ENODEV;
1030
1031         if (ci < CRYPT_ACTIVE) {
1032                 log_err(NULL, _("Device %s is not active.\n"), name);
1033                 return -ENODEV;
1034         }
1035
1036         r = dm_query_device(name, &device, &cad.size, &cad.iv_offset, &cad.offset,
1037                             &cipher_full, &key_size, &key, NULL, NULL,
1038                             &device_uuid);
1039         if (r < 0)
1040                 goto out;
1041
1042         /* Underlying device disappeared but mapping still active */
1043         if (!device)
1044                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1045                             name);
1046
1047         *cd = NULL;
1048         r = crypt_init(cd, device);
1049         if (r < 0)
1050                 goto out;
1051
1052         /* Try to initialise basic parameters from active device */
1053         if (device_uuid) {
1054                 if (!strncmp(CRYPT_PLAIN, device_uuid, sizeof(CRYPT_PLAIN)-1)) {
1055                         (*cd)->type = strdup(CRYPT_PLAIN);
1056                         (*cd)->plain_uuid = strdup(device_uuid);
1057                         (*cd)->plain_hdr.hash = NULL; /* no way to get this */
1058                         (*cd)->plain_hdr.offset = cad.offset;
1059                         (*cd)->plain_hdr.skip = cad.iv_offset;
1060                         (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1061                         if (!(*cd)->volume_key) {
1062                                 r = -ENOMEM;
1063                                 goto out;
1064                         }
1065
1066                         r = crypt_parse_name_and_mode(cipher_full, cipher, cipher_mode);
1067                         if (!r) {
1068                                 (*cd)->plain_cipher = strdup(cipher);
1069                                 (*cd)->plain_cipher_mode = strdup(cipher_mode);
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 int crypt_format(struct crypt_device *cd,
1200         const char *type,
1201         const char *cipher,
1202         const char *cipher_mode,
1203         const char *uuid,
1204         const char *volume_key,
1205         size_t volume_key_size,
1206         void *params)
1207 {
1208         int r;
1209
1210         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)");
1211
1212         if (!type)
1213                 return -EINVAL;
1214
1215         r = init_crypto(cd);
1216         if (r < 0)
1217                 return r;
1218
1219         if (isPLAIN(type))
1220                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1221                                         uuid, volume_key_size, params);
1222         else if (isLUKS(type))
1223                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1224                                         uuid, volume_key, volume_key_size, params);
1225         else {
1226                 /* FIXME: allow plugins here? */
1227                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1228                 r = -EINVAL;
1229         }
1230
1231         if (!r && !(cd->type = strdup(type)))
1232                 r = -ENOMEM;
1233
1234         if (r < 0) {
1235                 crypt_free_volume_key(cd->volume_key);
1236                 cd->volume_key = NULL;
1237         }
1238
1239         return r;
1240 }
1241
1242 int crypt_load(struct crypt_device *cd,
1243                const char *requested_type,
1244                void *params)
1245 {
1246         struct luks_phdr hdr;
1247         int r;
1248
1249         log_dbg("Trying to load %s crypt type from device %s.",
1250                 requested_type ?: "any", cd->device ?: "(none)");
1251
1252         if (!cd->device)
1253                 return -EINVAL;
1254
1255         if (requested_type && !isLUKS(requested_type))
1256                 return -EINVAL;
1257
1258         r = init_crypto(cd);
1259         if (r < 0)
1260                 return r;
1261
1262         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1263
1264         if (!r) {
1265                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1266                 cd->type = strdup(requested_type);
1267                 if (!cd->type)
1268                         r = -ENOMEM;
1269         }
1270
1271         return r;
1272 }
1273
1274 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1275 {
1276         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
1277         uint64_t size, skip, offset;
1278         int key_size, read_only, r;
1279
1280         /* Device context type must be initialised */
1281         if (!cd->type || !crypt_get_uuid(cd))
1282                 return -EINVAL;
1283
1284         r = dm_query_device(name, &device, &size, &skip, &offset,
1285                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
1286         if (r < 0) {
1287                 log_err(NULL, _("Device %s is not active.\n"), name);
1288                 goto out;
1289         }
1290
1291         if (!uuid) {
1292                 r = -EINVAL;
1293                 goto out;
1294         }
1295
1296         r = device_check_and_adjust(cd, device, 0, &new_size, &offset, &read_only);
1297         if (r)
1298                 goto out;
1299
1300         if (new_size == size) {
1301                 log_dbg("Device has already requested size %" PRIu64
1302                         " sectors.", size);
1303                 r = 0;
1304                 goto out;
1305         }
1306
1307         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1308
1309         r = dm_create_device(name, device, cipher, cd->type,
1310                              crypt_get_uuid(cd), new_size, skip, offset,
1311                              key_size, key, read_only, 1);
1312 out:
1313         crypt_safe_free(key);
1314         free(cipher);
1315         free(device);
1316         free(uuid);
1317
1318         return r;
1319 }
1320
1321 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1322 {
1323         if (!isLUKS(cd->type)) {
1324                 log_err(cd, _("This operation is not supported for this device type.\n"));
1325                 return  -EINVAL;
1326         }
1327
1328         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1329                 log_dbg("UUID is the same as requested (%s) for device %s.",
1330                         uuid, cd->device);
1331                 return 0;
1332         }
1333
1334         if (uuid)
1335                 log_dbg("Requested new UUID change to %s for %s.", uuid, cd->device);
1336         else
1337                 log_dbg("Requested new UUID refresh for %s.", cd->device);
1338
1339         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1340                 return -EPERM;
1341
1342         return LUKS_hdr_uuid_set(cd->device, &cd->hdr, uuid, cd);
1343 }
1344
1345 int crypt_header_backup(struct crypt_device *cd,
1346                         const char *requested_type,
1347                         const char *backup_file)
1348 {
1349         int r;
1350
1351         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1352                 return -EINVAL;
1353
1354         r = init_crypto(cd);
1355         if (r < 0)
1356                 return r;
1357
1358         log_dbg("Requested header backup of device %s (%s) to "
1359                 "file %s.", cd->device, requested_type, backup_file);
1360
1361         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1362 }
1363
1364 int crypt_header_restore(struct crypt_device *cd,
1365                          const char *requested_type,
1366                          const char *backup_file)
1367 {
1368         int r;
1369
1370         if (requested_type && !isLUKS(requested_type))
1371                 return -EINVAL;
1372
1373         /* Some hash functions need initialized gcrypt library */
1374         r = init_crypto(cd);
1375         if (r < 0)
1376                 return r;
1377
1378         log_dbg("Requested header restore to device %s (%s) from "
1379                 "file %s.", cd->device, requested_type, backup_file);
1380
1381         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1382 }
1383
1384 void crypt_free(struct crypt_device *cd)
1385 {
1386         if (cd) {
1387                 log_dbg("Releasing crypt device %s context.", cd->device);
1388
1389                 dm_exit();
1390                 crypt_free_volume_key(cd->volume_key);
1391
1392                 free(cd->device);
1393                 free(cd->type);
1394
1395                 /* used in plain device only */
1396                 free((char*)cd->plain_hdr.hash);
1397                 free(cd->plain_cipher);
1398                 free(cd->plain_cipher_mode);
1399                 free(cd->plain_uuid);
1400
1401                 free(cd);
1402         }
1403 }
1404
1405 int crypt_suspend(struct crypt_device *cd,
1406                   const char *name)
1407 {
1408         crypt_status_info ci;
1409         int r, suspended = 0;
1410
1411         log_dbg("Suspending volume %s.", name);
1412
1413         ci = crypt_status(NULL, name);
1414         if (ci < CRYPT_ACTIVE) {
1415                 log_err(cd, _("Volume %s is not active.\n"), name);
1416                 return -EINVAL;
1417         }
1418
1419         if (!cd && dm_init(NULL, 1) < 0)
1420                 return -ENOSYS;
1421
1422         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1423                             NULL, NULL, NULL, NULL, &suspended, NULL);
1424         if (r < 0)
1425                 goto out;
1426
1427         if (suspended) {
1428                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1429                 r = -EINVAL;
1430                 goto out;
1431         }
1432
1433         r = dm_suspend_and_wipe_key(name);
1434         if (r == -ENOTSUP)
1435                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1436         else if (r)
1437                 log_err(cd, "Error during suspending device %s.\n", name);
1438 out:
1439         if (!cd)
1440                 dm_exit();
1441         return r;
1442 }
1443
1444 int crypt_resume_by_passphrase(struct crypt_device *cd,
1445                                const char *name,
1446                                int keyslot,
1447                                const char *passphrase,
1448                                size_t passphrase_size)
1449 {
1450         struct volume_key *vk = NULL;
1451         int r, suspended = 0;
1452
1453         log_dbg("Resuming volume %s.", name);
1454
1455         if (!isLUKS(cd->type)) {
1456                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1457                 r = -EINVAL;
1458                 goto out;
1459         }
1460
1461         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1462                             NULL, NULL, NULL, NULL, &suspended, NULL);
1463         if (r < 0)
1464                 return r;
1465
1466         if (!suspended) {
1467                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1468                 return -EINVAL;
1469         }
1470
1471         if (passphrase) {
1472                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1473                                            passphrase_size, &cd->hdr, &vk, cd);
1474         } else
1475                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1476
1477         if (r >= 0) {
1478                 keyslot = r;
1479                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1480                 if (r == -ENOTSUP)
1481                         log_err(cd, "Resume is not supported for device %s.\n", name);
1482                 else if (r)
1483                         log_err(cd, "Error during resuming device %s.\n", name);
1484         } else
1485                 r = keyslot;
1486 out:
1487         crypt_free_volume_key(vk);
1488         return r < 0 ? r : keyslot;
1489 }
1490
1491 int crypt_resume_by_keyfile(struct crypt_device *cd,
1492                             const char *name,
1493                             int keyslot,
1494                             const char *keyfile,
1495                             size_t keyfile_size)
1496 {
1497         struct volume_key *vk = NULL;
1498         char *passphrase_read = NULL;
1499         unsigned int passphrase_size_read;
1500         int r, suspended = 0;
1501
1502         log_dbg("Resuming volume %s.", name);
1503
1504         if (!isLUKS(cd->type)) {
1505                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1506                 r = -EINVAL;
1507                 goto out;
1508         }
1509
1510         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1511                             NULL, NULL, NULL, NULL, &suspended, NULL);
1512         if (r < 0)
1513                 return r;
1514
1515         if (!suspended) {
1516                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1517                 return -EINVAL;
1518         }
1519
1520         if (!keyfile)
1521                 return -EINVAL;
1522
1523         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1524                           &passphrase_size_read, keyfile, keyfile_size);
1525         if (r < 0)
1526                 goto out;
1527
1528         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1529                                    passphrase_size_read, &cd->hdr, &vk, cd);
1530         if (r < 0)
1531                 goto out;
1532
1533         keyslot = r;
1534         r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1535         if (r)
1536                 log_err(cd, "Error during resuming device %s.\n", name);
1537 out:
1538         crypt_safe_free(passphrase_read);
1539         crypt_free_volume_key(vk);
1540         return r < 0 ? r : keyslot;
1541 }
1542
1543 // slot manipulation
1544 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1545         int keyslot, // -1 any
1546         const char *passphrase, // NULL -> terminal
1547         size_t passphrase_size,
1548         const char *new_passphrase, // NULL -> terminal
1549         size_t new_passphrase_size)
1550 {
1551         struct volume_key *vk = NULL;
1552         char *password = NULL, *new_password = NULL;
1553         unsigned int passwordLen, new_passwordLen;
1554         int r;
1555
1556         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1557                 "new passphrase %sprovided.",
1558                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1559
1560         if (!isLUKS(cd->type)) {
1561                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1562                 return -EINVAL;
1563         }
1564
1565         r = keyslot_verify_or_find_empty(cd, &keyslot);
1566         if (r)
1567                 return r;
1568
1569         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1570                 /* No slots used, try to use pre-generated key in header */
1571                 if (cd->volume_key) {
1572                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1573                         r = vk ? 0 : -ENOMEM;
1574                 } else {
1575                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1576                         return -EINVAL;
1577                 }
1578         } else if (passphrase) {
1579                 /* Passphrase provided, use it to unlock existing keyslot */
1580                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1581                                            passphrase_size, &cd->hdr, &vk, cd);
1582         } else {
1583                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1584                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1585                                       &password, &passwordLen, 0);
1586                 if (r < 0)
1587                         goto out;
1588
1589                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1590                                            passwordLen, &cd->hdr, &vk, cd);
1591                 crypt_safe_free(password);
1592         }
1593
1594         if(r < 0)
1595                 goto out;
1596
1597         if (new_passphrase) {
1598                 new_password = (char *)new_passphrase;
1599                 new_passwordLen = new_passphrase_size;
1600         } else {
1601                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1602                                       &new_password, &new_passwordLen, 1);
1603                 if(r < 0)
1604                         goto out;
1605         }
1606
1607         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1608                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1609         if(r < 0) goto out;
1610
1611         r = 0;
1612 out:
1613         if (!new_passphrase)
1614                 crypt_safe_free(new_password);
1615         crypt_free_volume_key(vk);
1616         return r ?: keyslot;
1617 }
1618
1619 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1620         int keyslot,
1621         const char *keyfile,
1622         size_t keyfile_size,
1623         const char *new_keyfile,
1624         size_t new_keyfile_size)
1625 {
1626         struct volume_key *vk = NULL;
1627         char *password = NULL; unsigned int passwordLen;
1628         char *new_password = NULL; unsigned int new_passwordLen;
1629         int r;
1630
1631         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1632                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1633
1634         if (!isLUKS(cd->type)) {
1635                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1636                 return -EINVAL;
1637         }
1638
1639         r = keyslot_verify_or_find_empty(cd, &keyslot);
1640         if (r)
1641                 return r;
1642
1643         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1644                 /* No slots used, try to use pre-generated key in header */
1645                 if (cd->volume_key) {
1646                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1647                         r = vk ? 0 : -ENOMEM;
1648                 } else {
1649                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1650                         return -EINVAL;
1651                 }
1652         } else {
1653                 /* Read password from file of (if NULL) from terminal */
1654                 if (keyfile)
1655                         r = key_from_file(cd, _("Enter any passphrase: "),
1656                                           &password, &passwordLen,
1657                                           keyfile, keyfile_size);
1658                 else
1659                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1660                                               &password, &passwordLen, 0);
1661                 if (r < 0)
1662                         goto out;
1663
1664                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1665                                            &cd->hdr, &vk, cd);
1666         }
1667
1668         if(r < 0)
1669                 goto out;
1670
1671         if (new_keyfile)
1672                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1673                                   &new_password, &new_passwordLen, new_keyfile,
1674                                   new_keyfile_size);
1675         else
1676                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1677                                       &new_password, &new_passwordLen, 1);
1678         if (r < 0)
1679                 goto out;
1680
1681         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1682                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1683 out:
1684         crypt_safe_free(password);
1685         crypt_safe_free(new_password);
1686         crypt_free_volume_key(vk);
1687         return r < 0 ? r : keyslot;
1688 }
1689
1690 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1691         int keyslot,
1692         const char *volume_key,
1693         size_t volume_key_size,
1694         const char *passphrase,
1695         size_t passphrase_size)
1696 {
1697         struct volume_key *vk = NULL;
1698         int r = -EINVAL;
1699         char *new_password = NULL; unsigned int new_passwordLen;
1700
1701         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1702
1703         if (!isLUKS(cd->type)) {
1704                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1705                 return -EINVAL;
1706         }
1707
1708         if (volume_key)
1709                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1710         else if (cd->volume_key)
1711                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1712
1713         if (!vk)
1714                 return -ENOMEM;
1715
1716         r = LUKS_verify_volume_key(&cd->hdr, vk);
1717         if (r < 0) {
1718                 log_err(cd, _("Volume key does not match the volume.\n"));
1719                 goto out;
1720         }
1721
1722         r = keyslot_verify_or_find_empty(cd, &keyslot);
1723         if (r)
1724                 goto out;
1725
1726         if (!passphrase) {
1727                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1728                                       &new_password, &new_passwordLen, 1);
1729                 if (r < 0)
1730                         goto out;
1731                 passphrase = new_password;
1732                 passphrase_size = new_passwordLen;
1733         }
1734
1735         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1736                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1737 out:
1738         crypt_safe_free(new_password);
1739         crypt_free_volume_key(vk);
1740         return (r < 0) ? r : keyslot;
1741 }
1742
1743 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1744 {
1745         crypt_keyslot_info ki;
1746
1747         log_dbg("Destroying keyslot %d.", keyslot);
1748
1749         if (!isLUKS(cd->type)) {
1750                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1751                 return -EINVAL;
1752         }
1753
1754         ki = crypt_keyslot_status(cd, keyslot);
1755         if (ki == CRYPT_SLOT_INVALID) {
1756                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1757                 return -EINVAL;
1758         }
1759
1760         if (ki == CRYPT_SLOT_INACTIVE) {
1761                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1762                 return -EINVAL;
1763         }
1764
1765         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1766 }
1767
1768 // activation/deactivation of device mapping
1769 int crypt_activate_by_passphrase(struct crypt_device *cd,
1770         const char *name,
1771         int keyslot,
1772         const char *passphrase,
1773         size_t passphrase_size,
1774         uint32_t flags)
1775 {
1776         crypt_status_info ci;
1777         struct volume_key *vk = NULL;
1778         char *read_passphrase = NULL;
1779         int r;
1780
1781         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1782                 name ? "Activating" : "Checking", name ?: "",
1783                 keyslot, passphrase ? "" : "[none] ");
1784
1785         if (name) {
1786                 ci = crypt_status(NULL, name);
1787                 if (ci == CRYPT_INVALID)
1788                         return -EINVAL;
1789                 else if (ci >= CRYPT_ACTIVE) {
1790                         log_err(cd, _("Device %s already exists.\n"), name);
1791                         return -EEXIST;
1792                 }
1793         }
1794
1795         /* plain, use hashed passphrase */
1796         if (isPLAIN(cd->type)) {
1797                 if (!passphrase) {
1798                         r = key_from_terminal(cd, NULL, &read_passphrase,
1799                                               &passphrase_size, 0);
1800                         if (r < 0)
1801                                 goto out;
1802                         passphrase = read_passphrase;
1803                 }
1804                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1805                                          cd->plain_cipher, cd->plain_cipher_mode,
1806                                          NULL, passphrase, passphrase_size,
1807                                          cd->volume_key->keylength, 0,
1808                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
1809                                          cd->plain_uuid,
1810                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1811                 keyslot = 0;
1812         } else if (isLUKS(cd->type)) {
1813                 /* provided passphrase, do not retry */
1814                 if (passphrase) {
1815                         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1816                                                    passphrase_size, &cd->hdr, &vk, cd);
1817                 } else
1818                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1819
1820                 if (r >= 0) {
1821                         keyslot = r;
1822                         if (name)
1823                                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1824                 }
1825         } else
1826                 r = -EINVAL;
1827 out:
1828         crypt_safe_free(read_passphrase);
1829         crypt_free_volume_key(vk);
1830
1831         return r < 0  ? r : keyslot;
1832 }
1833
1834 int crypt_activate_by_keyfile(struct crypt_device *cd,
1835         const char *name,
1836         int keyslot,
1837         const char *keyfile,
1838         size_t keyfile_size,
1839         uint32_t flags)
1840 {
1841         crypt_status_info ci;
1842         struct volume_key *vk = NULL;
1843         char *passphrase_read = NULL;
1844         unsigned int passphrase_size_read;
1845         int r;
1846
1847         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1848                 name ?: "", keyslot, keyfile ?: "[none]");
1849
1850         if (!isLUKS(cd->type)) {
1851                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1852                 return -EINVAL;
1853         }
1854
1855         if (name) {
1856                 ci = crypt_status(NULL, name);
1857                 if (ci == CRYPT_INVALID)
1858                         return -EINVAL;
1859                 else if (ci >= CRYPT_ACTIVE) {
1860                         log_err(cd, _("Device %s already exists.\n"), name);
1861                         return -EEXIST;
1862                 }
1863         }
1864
1865         if (!keyfile)
1866                 return -EINVAL;
1867
1868         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1869                           &passphrase_size_read, keyfile, keyfile_size);
1870         if (r < 0)
1871                 goto out;
1872
1873         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1874                                    passphrase_size_read, &cd->hdr, &vk, cd);
1875         if (r < 0)
1876                 goto out;
1877
1878         keyslot = r;
1879         if (name)
1880                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1881 out:
1882         crypt_safe_free(passphrase_read);
1883         crypt_free_volume_key(vk);
1884
1885         return r < 0 ? r : keyslot;
1886 }
1887
1888 int crypt_activate_by_volume_key(struct crypt_device *cd,
1889         const char *name,
1890         const char *volume_key,
1891         size_t volume_key_size,
1892         uint32_t flags)
1893 {
1894         crypt_status_info ci;
1895         struct volume_key *vk;
1896         int r;
1897
1898         log_dbg("Activating volume %s by volume key.", name);
1899
1900         /* use key directly, no hash */
1901         if (isPLAIN(cd->type)) {
1902                 if (!volume_key || !volume_key_size || !cd->volume_key ||
1903                         volume_key_size != cd->volume_key->keylength) {
1904                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
1905                         return -EINVAL;
1906                 }
1907
1908                 return create_device_helper(cd, name, NULL,
1909                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1910                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
1911                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1912         }
1913
1914         if (!isLUKS(cd->type)) {
1915                 log_err(cd, _("Device type is not properly initialised.\n"));
1916                 return -EINVAL;
1917         }
1918
1919         if (name) {
1920                 ci = crypt_status(NULL, name);
1921                 if (ci == CRYPT_INVALID)
1922                         return -EINVAL;
1923                 else if (ci >= CRYPT_ACTIVE) {
1924                         log_err(cd, _("Device %s already exists.\n"), name);
1925                         return -EEXIST;
1926                 }
1927         }
1928
1929         /* If key is not provided, try to use internal key */
1930         if (!volume_key) {
1931                 if (!cd->volume_key) {
1932                         log_err(cd, _("Volume key does not match the volume.\n"));
1933                         return -EINVAL;
1934                 }
1935                 volume_key_size = cd->volume_key->keylength;
1936                 volume_key = cd->volume_key->key;
1937         }
1938
1939         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1940         if (!vk)
1941                 return -ENOMEM;
1942         r = LUKS_verify_volume_key(&cd->hdr, vk);
1943
1944         if (r == -EPERM)
1945                 log_err(cd, _("Volume key does not match the volume.\n"));
1946
1947         if (!r && name)
1948                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1949
1950         crypt_free_volume_key(vk);
1951
1952         return r;
1953 }
1954
1955 int crypt_deactivate(struct crypt_device *cd, const char *name)
1956 {
1957         int r;
1958
1959         if (!name)
1960                 return -EINVAL;
1961
1962         log_dbg("Deactivating volume %s.", name);
1963
1964         if (!cd && dm_init(NULL, 1) < 0)
1965                 return -ENOSYS;
1966
1967         switch (crypt_status(cd, name)) {
1968                 case CRYPT_ACTIVE:
1969                         r = dm_remove_device(name, 0, 0);
1970                         break;
1971                 case CRYPT_BUSY:
1972                         log_err(cd, _("Device %s is busy.\n"), name);
1973                         r = -EBUSY;
1974                         break;
1975                 case CRYPT_INACTIVE:
1976                         log_err(cd, _("Device %s is not active.\n"), name);
1977                         r = -ENODEV;
1978                         break;
1979                 default:
1980                         log_err(cd, _("Invalid device %s.\n"), name);
1981                         r = -EINVAL;
1982         }
1983
1984         if (!cd)
1985                 dm_exit();
1986
1987         return r;
1988 }
1989
1990 int crypt_volume_key_get(struct crypt_device *cd,
1991         int keyslot,
1992         char *volume_key,
1993         size_t *volume_key_size,
1994         const char *passphrase,
1995         size_t passphrase_size)
1996 {
1997         struct volume_key *vk;
1998         char *processed_key = NULL;
1999         int r, key_len;
2000
2001         key_len = crypt_get_volume_key_size(cd);
2002         if (key_len > *volume_key_size) {
2003                 log_err(cd, _("Volume key buffer too small.\n"));
2004                 return -ENOMEM;
2005         }
2006
2007         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2008                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
2009                                             passphrase, passphrase_size);
2010                 if (!processed_key) {
2011                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2012                         return -EINVAL;
2013                 }
2014                 memcpy(volume_key, processed_key, key_len);
2015                 *volume_key_size = key_len;
2016                 crypt_safe_free(processed_key);
2017                 return 0;
2018         }
2019
2020         if (isLUKS(cd->type)) {
2021                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
2022                                         passphrase_size, &cd->hdr, &vk, cd);
2023
2024                 if (r >= 0) {
2025                         memcpy(volume_key, vk->key, vk->keylength);
2026                         *volume_key_size = vk->keylength;
2027                 }
2028
2029                 crypt_free_volume_key(vk);
2030                 return r;
2031         }
2032
2033         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2034         return -EINVAL;
2035 }
2036
2037 int crypt_volume_key_verify(struct crypt_device *cd,
2038         const char *volume_key,
2039         size_t volume_key_size)
2040 {
2041         struct volume_key *vk;
2042         int r;
2043
2044         if (!isLUKS(cd->type)) {
2045                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2046                 return -EINVAL;
2047         }
2048
2049         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2050         if (!vk)
2051                 return -ENOMEM;
2052
2053         r = LUKS_verify_volume_key(&cd->hdr, vk);
2054
2055         if (r == -EPERM)
2056                 log_err(cd, _("Volume key does not match the volume.\n"));
2057
2058         crypt_free_volume_key(vk);
2059
2060         return r;
2061 }
2062
2063 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2064 {
2065         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2066         cd->timeout = timeout_sec;
2067 }
2068
2069 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2070 {
2071         log_dbg("Password retry count set to %d.", tries);
2072         cd->tries = tries;
2073 }
2074
2075 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2076 {
2077         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2078         cd->iteration_time = iteration_time_ms;
2079 }
2080
2081 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2082 {
2083         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2084         cd->password_verify = password_verify ? 1 : 0;
2085 }
2086
2087 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2088 {
2089         switch (rng_type) {
2090         case CRYPT_RNG_URANDOM:
2091         case CRYPT_RNG_RANDOM:
2092                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2093                 cd->rng_type = rng_type;
2094         }
2095 }
2096
2097 int crypt_get_rng_type(struct crypt_device *cd)
2098 {
2099         if (!cd)
2100                 return -EINVAL;
2101
2102         return cd->rng_type;
2103 }
2104
2105 int crypt_memory_lock(struct crypt_device *cd, int lock)
2106 {
2107         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2108 }
2109
2110 // reporting
2111 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2112 {
2113         int r;
2114
2115         if (!cd && dm_init(NULL, 1) < 0)
2116                 return CRYPT_INVALID;
2117
2118         r = dm_status_device(name);
2119
2120         if (!cd)
2121                 dm_exit();
2122
2123         if (r < 0 && r != -ENODEV)
2124                 return CRYPT_INVALID;
2125
2126         if (r == 0)
2127                 return CRYPT_ACTIVE;
2128
2129         if (r > 0)
2130                 return CRYPT_BUSY;
2131
2132         return CRYPT_INACTIVE;
2133 }
2134
2135 static void hexprintICB(struct crypt_device *cd, char *d, int n)
2136 {
2137         int i;
2138         for(i = 0; i < n; i++)
2139                 log_std(cd, "%02hhx ", (char)d[i]);
2140 }
2141
2142 int crypt_dump(struct crypt_device *cd)
2143 {
2144         int i;
2145         if (!isLUKS(cd->type)) { //FIXME
2146                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2147                 return -EINVAL;
2148         }
2149
2150         log_std(cd, "LUKS header information for %s\n\n", cd->device);
2151         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2152         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2153         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2154         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2155         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2156         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2157         log_std(cd, "MK digest:     \t");
2158         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
2159         log_std(cd, "\n");
2160         log_std(cd, "MK salt:       \t");
2161         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
2162         log_std(cd, "\n               \t");
2163         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2164         log_std(cd, "\n");
2165         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2166         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2167         for(i = 0; i < LUKS_NUMKEYS; i++) {
2168                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2169                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2170                         log_std(cd, "\tIterations:         \t%d\n",
2171                                 cd->hdr.keyblock[i].passwordIterations);
2172                         log_std(cd, "\tSalt:               \t");
2173                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2174                                     LUKS_SALTSIZE/2);
2175                         log_std(cd, "\n\t                      \t");
2176                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2177                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2178                         log_std(cd, "\n");
2179
2180                         log_std(cd, "\tKey material offset:\t%d\n",
2181                                 cd->hdr.keyblock[i].keyMaterialOffset);
2182                         log_std(cd, "\tAF stripes:            \t%d\n",
2183                                 cd->hdr.keyblock[i].stripes);
2184                 }
2185                 else
2186                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2187         }
2188
2189         return 0;
2190 }
2191
2192 const char *crypt_get_cipher(struct crypt_device *cd)
2193 {
2194         if (isPLAIN(cd->type))
2195                 return cd->plain_cipher;
2196
2197         if (isLUKS(cd->type))
2198                 return cd->hdr.cipherName;
2199
2200         return NULL;
2201 }
2202
2203 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2204 {
2205         if (isPLAIN(cd->type))
2206                 return cd->plain_cipher_mode;
2207
2208         if (isLUKS(cd->type))
2209                 return cd->hdr.cipherMode;
2210
2211         return NULL;
2212 }
2213
2214 const char *crypt_get_uuid(struct crypt_device *cd)
2215 {
2216         if (isLUKS(cd->type))
2217                 return cd->hdr.uuid;
2218
2219         if (isPLAIN(cd->type))
2220                 return cd->plain_uuid;
2221
2222         return NULL;
2223 }
2224
2225 const char *crypt_get_device_name(struct crypt_device *cd)
2226 {
2227         return cd->device;
2228 }
2229
2230 int crypt_get_volume_key_size(struct crypt_device *cd)
2231 {
2232         if (isPLAIN(cd->type) && cd->volume_key)
2233                 return cd->volume_key->keylength;
2234
2235         if (isLUKS(cd->type))
2236                 return cd->hdr.keyBytes;
2237
2238         return 0;
2239 }
2240
2241 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2242 {
2243         if (isPLAIN(cd->type))
2244                 return cd->plain_hdr.offset;
2245
2246         if (isLUKS(cd->type))
2247                 return cd->hdr.payloadOffset;
2248
2249         return 0;
2250 }
2251
2252 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2253 {
2254         if (!isLUKS(cd->type)) {
2255                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2256                 return CRYPT_SLOT_INVALID;
2257         }
2258
2259         return LUKS_keyslot_info(&cd->hdr, keyslot);
2260 }
2261
2262 int crypt_keyslot_max(const char *type)
2263 {
2264         if (type && isLUKS(type))
2265                 return LUKS_NUMKEYS;
2266
2267         return -EINVAL;
2268 }
2269
2270 const char *crypt_get_type(struct crypt_device *cd)
2271 {
2272         return cd->type;
2273 }
2274
2275 int crypt_get_active_device(struct crypt_device *cd,
2276                             const char *name,
2277                             struct crypt_active_device *cad)
2278 {
2279         int r, readonly;
2280
2281         r = dm_query_device(name, NULL, &cad->size, &cad->iv_offset, &cad->offset,
2282                             NULL, NULL, NULL, &readonly, NULL, NULL);
2283         if (r < 0)
2284                 return r;
2285
2286         cad->flags = readonly ? CRYPT_ACTIVATE_READONLY : 0;
2287
2288         return 0;
2289 }