lib/setup.c

   1 /*
   2  * libcryptsetup - cryptsetup library
   3  *
   4  * Copyright (C) 2004, Jana Saout <jana@saout.de>
   5  * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
   6  * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
   7  * Copyright (C) 2009-2014, Milan Broz
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include <string.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <stdarg.h>
  28 #include <sys/utsname.h>
  29 #include <fcntl.h>
  30 #include <errno.h>
  31
  32 #include "libcryptsetup.h"
  33 #include "luks.h"
  34 #include "loopaes.h"
  35 #include "verity.h"
  36 #include "tcrypt.h"
  37 #include "internal.h"
  38
  39 struct crypt_device {
  40         char *type;
  41
  42         struct device *device;
  43         struct device *metadata_device;
  44
  45         struct volume_key *volume_key;
  46         uint64_t timeout;
  47         uint64_t iteration_time;
  48         int tries;
  49         int password_verify;
  50         int rng_type;
  51
  52         // FIXME: private binary headers and access it properly
  53         // through sub-library (LUKS1, TCRYPT)
  54
  55         union {
  56         struct { /* used in CRYPT_LUKS1 */
  57                 struct luks_phdr hdr;
  58                 uint64_t PBKDF2_per_sec;
  59         } luks1;
  60         struct { /* used in CRYPT_PLAIN */
  61                 struct crypt_params_plain hdr;
  62                 char *cipher;
  63                 char *cipher_mode;
  64                 unsigned int key_size;
  65         } plain;
  66         struct { /* used in CRYPT_LOOPAES */
  67                 struct crypt_params_loopaes hdr;
  68                 char *cipher;
  69                 char *cipher_mode;
  70                 unsigned int key_size;
  71         } loopaes;
  72         struct { /* used in CRYPT_VERITY */
  73                 struct crypt_params_verity hdr;
  74                 char *root_hash;
  75                 unsigned int root_hash_size;
  76                 char *uuid;
  77         } verity;
  78         struct { /* used in CRYPT_TCRYPT */
  79                 struct crypt_params_tcrypt params;
  80                 struct tcrypt_phdr hdr;
  81         } tcrypt;
  82         struct { /* used if initialized without header by name */
  83                 char *active_name;
  84                 /* buffers, must refresh from kernel on every query */
  85                 char cipher[MAX_CIPHER_LEN];
  86                 char cipher_mode[MAX_CIPHER_LEN];
  87                 unsigned int key_size;
  88         } none;
  89         } u;
  90
  91         /* callbacks definitions */
  92         void (*log)(int level, const char *msg, void *usrptr);
  93         void *log_usrptr;
  94         int (*confirm)(const char *msg, void *usrptr);
  95         void *confirm_usrptr;
  96         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  97         void *password_usrptr;
  98
  99         /* last error message */
 100         char error[MAX_ERROR_LENGTH];
 101 };
 102
 103 /* Just to suppress redundant messages about crypto backend */
 104 static int _crypto_logged = 0;
 105
 106 /* Global error */
 107 /* FIXME: not thread safe, remove this later */
 108 static char global_error[MAX_ERROR_LENGTH] = {0};
 109
 110 /* Log helper */
 111 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
 112 static int _debug_level = 0;
 113
 114 void crypt_set_debug_level(int level)
 115 {
 116         _debug_level = level;
 117 }
 118
 119 int crypt_get_debug_level(void)
 120 {
 121         return _debug_level;
 122 }
 123
 124 static void crypt_set_error(struct crypt_device *cd, const char *error)
 125 {
 126         size_t size = strlen(error);
 127
 128         /* Set global error, ugly hack... */
 129         strncpy(global_error, error, MAX_ERROR_LENGTH - 2);
 130         if (size < MAX_ERROR_LENGTH && global_error[size - 1] == '\n')
 131                 global_error[size - 1] = '\0';
 132
 133         /* Set error string per context */
 134         if (cd) {
 135                 strncpy(cd->error, error, MAX_ERROR_LENGTH - 2);
 136                 if (size < MAX_ERROR_LENGTH && cd->error[size - 1] == '\n')
 137                         cd->error[size - 1] = '\0';
 138         }
 139 }
 140
 141 void crypt_log(struct crypt_device *cd, int level, const char *msg)
 142 {
 143         if (cd && cd->log)
 144                 cd->log(level, msg, cd->log_usrptr);
 145         else if (_default_log)
 146                 _default_log(level, msg, NULL);
 147
 148         if (level == CRYPT_LOG_ERROR)
 149                 crypt_set_error(cd, msg);
 150 }
 151
 152 __attribute__((format(printf, 5, 6)))
 153 void logger(struct crypt_device *cd, int level, const char *file,
 154             int line, const char *format, ...)
 155 {
 156         va_list argp;
 157         char *target = NULL;
 158
 159         va_start(argp, format);
 160
 161         if (vasprintf(&target, format, argp) > 0 ) {
 162                 if (level >= 0) {
 163                         crypt_log(cd, level, target);
 164 #ifdef CRYPT_DEBUG
 165                 } else if (_debug_level)
 166                         printf("# %s:%d %s\n", file ?: "?", line, target);
 167 #else
 168                 } else if (_debug_level)
 169                         printf("# %s\n", target);
 170 #endif
 171         }
 172
 173         va_end(argp);
 174         free(target);
 175 }
 176
 177 static const char *mdata_device_path(struct crypt_device *cd)
 178 {
 179         return device_path(cd->metadata_device ?: cd->device);
 180 }
 181
 182 /* internal only */
 183 struct device *crypt_metadata_device(struct crypt_device *cd)
 184 {
 185         return cd->metadata_device ?: cd->device;
 186 }
 187
 188 struct device *crypt_data_device(struct crypt_device *cd)
 189 {
 190         return cd->device;
 191 }
 192
 193 int init_crypto(struct crypt_device *ctx)
 194 {
 195         struct utsname uts;
 196         int r;
 197
 198         r = crypt_random_init(ctx);
 199         if (r < 0) {
 200                 log_err(ctx, _("Cannot initialize crypto RNG backend.\n"));
 201                 return r;
 202         }
 203
 204         r = crypt_backend_init(ctx);
 205         if (r < 0)
 206                 log_err(ctx, _("Cannot initialize crypto backend.\n"));
 207
 208         if (!r && !_crypto_logged) {
 209                 log_dbg("Crypto backend (%s) initialized.", crypt_backend_version());
 210                 if (!uname(&uts))
 211                         log_dbg("Detected kernel %s %s %s.",
 212                                 uts.sysname, uts.release, uts.machine);
 213                 _crypto_logged = 1;
 214         }
 215
 216         return r;
 217 }
 218
 219 static int process_key(struct crypt_device *cd, const char *hash_name,
 220                        size_t key_size, const char *pass, size_t passLen,
 221                        struct volume_key **vk)
 222 {
 223         int r;
 224
 225         if (!key_size)
 226                 return -EINVAL;
 227
 228         *vk = crypt_alloc_volume_key(key_size, NULL);
 229         if (!*vk)
 230                 return -ENOMEM;
 231
 232         if (hash_name) {
 233                 r = crypt_plain_hash(cd, hash_name, (*vk)->key, key_size, pass, passLen);
 234                 if (r < 0) {
 235                         if (r == -ENOENT)
 236                                 log_err(cd, _("Hash algorithm %s not supported.\n"),
 237                                         hash_name);
 238                         else
 239                                 log_err(cd, _("Key processing error (using hash %s).\n"),
 240                                         hash_name);
 241                         crypt_free_volume_key(*vk);
 242                         *vk = NULL;
 243                         return -EINVAL;
 244                 }
 245         } else if (passLen > key_size) {
 246                 memcpy((*vk)->key, pass, key_size);
 247         } else {
 248                 memcpy((*vk)->key, pass, passLen);
 249         }
 250
 251         return 0;
 252 }
 253
 254 static int isPLAIN(const char *type)
 255 {
 256         return (type && !strcmp(CRYPT_PLAIN, type));
 257 }
 258
 259 static int isLUKS(const char *type)
 260 {
 261         return (type && !strcmp(CRYPT_LUKS1, type));
 262 }
 263
 264 static int isLOOPAES(const char *type)
 265 {
 266         return (type && !strcmp(CRYPT_LOOPAES, type));
 267 }
 268
 269 static int isVERITY(const char *type)
 270 {
 271         return (type && !strcmp(CRYPT_VERITY, type));
 272 }
 273
 274 static int isTCRYPT(const char *type)
 275 {
 276         return (type && !strcmp(CRYPT_TCRYPT, type));
 277 }
 278
 279 static int onlyLUKS(struct crypt_device *cd)
 280 {
 281         int r = 0;
 282
 283         if (cd && !cd->type) {
 284                 log_err(cd, _("Cannot determine device type. Incompatible activation of device?\n"));
 285                 r = -EINVAL;
 286         }
 287         if (!cd || !isLUKS(cd->type)) {
 288                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
 289                 r = -EINVAL;
 290         }
 291
 292         return r;
 293 }
 294
 295 static void crypt_set_null_type(struct crypt_device *cd)
 296 {
 297         if (!cd->type)
 298                 return;
 299
 300         free(cd->type);
 301         cd->type = NULL;
 302         cd->u.none.active_name = NULL;
 303 }
 304
 305 static void crypt_reset_null_type(struct crypt_device *cd)
 306 {
 307         if (cd->type)
 308                 return;
 309
 310         free(cd->u.none.active_name);
 311         cd->u.none.active_name = NULL;
 312 }
 313
 314 /* keyslot helpers */
 315 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 316 {
 317         if (*keyslot == CRYPT_ANY_SLOT) {
 318                 *keyslot = LUKS_keyslot_find_empty(&cd->u.luks1.hdr);
 319                 if (*keyslot < 0) {
 320                         log_err(cd, _("All key slots full.\n"));
 321                         return -EINVAL;
 322                 }
 323         }
 324
 325         switch (LUKS_keyslot_info(&cd->u.luks1.hdr, *keyslot)) {
 326                 case CRYPT_SLOT_INVALID:
 327                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 328                                 *keyslot, LUKS_NUMKEYS - 1);
 329                         return -EINVAL;
 330                 case CRYPT_SLOT_INACTIVE:
 331                         break;
 332                 default:
 333                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 334                                 *keyslot);
 335                         return -EINVAL;
 336         }
 337
 338         return 0;
 339 }
 340
 341 /*
 342  * compares UUIDs returned by device-mapper (striped by cryptsetup) and uuid in header
 343  */
 344 static int crypt_uuid_cmp(const char *dm_uuid, const char *hdr_uuid)
 345 {
 346         int i, j;
 347         char *str;
 348
 349         if (!dm_uuid || !hdr_uuid)
 350                 return -EINVAL;
 351
 352         str = strchr(dm_uuid, '-');
 353         if (!str)
 354                 return -EINVAL;
 355
 356         for (i = 0, j = 1; hdr_uuid[i]; i++) {
 357                 if (hdr_uuid[i] == '-')
 358                         continue;
 359
 360                 if (!str[j] || str[j] == '-')
 361                         return -EINVAL;
 362
 363                 if (str[j] != hdr_uuid[i])
 364                         return -EINVAL;
 365                 j++;
 366         }
 367
 368         return 0;
 369 }
 370
 371 /*
 372  * compares type of active device to provided string (only if there is no explicit type)
 373  */
 374 static int crypt_uuid_type_cmp(struct crypt_device *cd, const char *type)
 375 {
 376         struct crypt_dm_active_device dmd = {};
 377         size_t len;
 378         int r;
 379
 380         /* Must user header-on-disk if we know type here */
 381         if (cd->type || !cd->u.none.active_name)
 382                 return -EINVAL;
 383
 384         log_dbg("Checking if active device %s without header has UUID type %s.",
 385                 cd->u.none.active_name, type);
 386
 387         r = dm_query_device(cd, cd->u.none.active_name, DM_ACTIVE_UUID, &dmd);
 388         if (r < 0)
 389                 return r;
 390
 391         r = -ENODEV;
 392         len = strlen(type);
 393         if (dmd.uuid && strlen(dmd.uuid) > len &&
 394             !strncmp(dmd.uuid, type, len) && dmd.uuid[len] == '-')
 395                 r = 0;
 396
 397         free(CONST_CAST(void*)dmd.uuid);
 398         return r;
 399 }
 400
 401 int PLAIN_activate(struct crypt_device *cd,
 402                      const char *name,
 403                      struct volume_key *vk,
 404                      uint64_t size,
 405                      uint32_t flags)
 406 {
 407         int r;
 408         char *dm_cipher = NULL;
 409         enum devcheck device_check;
 410         struct crypt_dm_active_device dmd = {
 411                 .target = DM_CRYPT,
 412                 .size   = size,
 413                 .flags  = flags,
 414                 .data_device = crypt_data_device(cd),
 415                 .u.crypt  = {
 416                         .cipher = NULL,
 417                         .vk     = vk,
 418                         .offset = crypt_get_data_offset(cd),
 419                         .iv_offset = crypt_get_iv_offset(cd),
 420                 }
 421         };
 422
 423         if (dmd.flags & CRYPT_ACTIVATE_SHARED)
 424                 device_check = DEV_SHARED;
 425         else
 426                 device_check = DEV_EXCL;
 427
 428         r = device_block_adjust(cd, dmd.data_device, device_check,
 429                                 dmd.u.crypt.offset, &dmd.size, &dmd.flags);
 430         if (r)
 431                 return r;
 432
 433         if (crypt_get_cipher_mode(cd))
 434                 r = asprintf(&dm_cipher, "%s-%s", crypt_get_cipher(cd), crypt_get_cipher_mode(cd));
 435         else
 436                 r = asprintf(&dm_cipher, "%s", crypt_get_cipher(cd));
 437         if (r < 0)
 438                 return -ENOMEM;
 439
 440         dmd.u.crypt.cipher = dm_cipher;
 441         log_dbg("Trying to activate PLAIN device %s using cipher %s.",
 442                 name, dmd.u.crypt.cipher);
 443
 444         r = dm_create_device(cd, name, CRYPT_PLAIN, &dmd, 0);
 445
 446         free(dm_cipher);
 447         return r;
 448 }
 449
 450 int crypt_confirm(struct crypt_device *cd, const char *msg)
 451 {
 452         if (!cd || !cd->confirm)
 453                 return 1;
 454         else
 455                 return cd->confirm(msg, cd->confirm_usrptr);
 456 }
 457
 458 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 459                               size_t *key_len, int force_verify)
 460 {
 461         char *prompt = NULL, *device_name;
 462         int r;
 463
 464         *key = NULL;
 465         if(!msg) {
 466                 if (crypt_loop_device(crypt_get_device_name(cd)))
 467                         device_name = crypt_loop_backing_file(crypt_get_device_name(cd));
 468                 else
 469                         device_name = strdup(crypt_get_device_name(cd));
 470                 if (!device_name)
 471                         return -ENOMEM;
 472                 r = asprintf(&prompt, _("Enter passphrase for %s: "), device_name);
 473                 free(device_name);
 474                 if (r < 0)
 475                         return -ENOMEM;
 476                 msg = prompt;
 477         }
 478
 479         if (cd->password) {
 480                 *key = crypt_safe_alloc(DEFAULT_PASSPHRASE_SIZE_MAX);
 481                 if (!*key) {
 482                         r = -ENOMEM;
 483                         goto out;
 484                 }
 485                 r = cd->password(msg, *key, DEFAULT_PASSPHRASE_SIZE_MAX,
 486                                  cd->password_usrptr);
 487                 if (r < 0) {
 488                         crypt_safe_free(*key);
 489                         *key = NULL;
 490                 } else
 491                         *key_len = r;
 492         } else
 493                 r = crypt_get_key(msg, key, key_len, 0, 0, NULL, cd->timeout,
 494                                   (force_verify || cd->password_verify), cd);
 495 out:
 496         free(prompt);
 497         return (r < 0) ? r: 0;
 498 }
 499
 500 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 501                                              struct volume_key **vk)
 502 {
 503         char *passphrase_read = NULL;
 504         size_t passphrase_size_read;
 505         int r = -EINVAL, eperm = 0, tries = cd->tries;
 506
 507         *vk = NULL;
 508         do {
 509                 crypt_free_volume_key(*vk);
 510                 *vk = NULL;
 511
 512                 r = key_from_terminal(cd, NULL, &passphrase_read,
 513                                       &passphrase_size_read, 0);
 514                 /* Continue if it is just passphrase verify mismatch */
 515                 if (r == -EPERM)
 516                         continue;
 517                 if(r < 0)
 518                         goto out;
 519
 520                 r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
 521                                            passphrase_size_read, &cd->u.luks1.hdr, vk, cd);
 522                 if (r == -EPERM)
 523                         eperm = 1;
 524                 crypt_safe_free(passphrase_read);
 525                 passphrase_read = NULL;
 526         } while (r == -EPERM && (--tries > 0));
 527 out:
 528         if (r < 0) {
 529                 crypt_free_volume_key(*vk);
 530                 *vk = NULL;
 531
 532                 /* Report wrong passphrase if at least one try failed */
 533                 if (eperm && r == -EPIPE)
 534                         r = -EPERM;
 535         }
 536
 537         crypt_safe_free(passphrase_read);
 538         return r;
 539 }
 540
 541 static int key_from_file(struct crypt_device *cd, char *msg,
 542                           char **key, size_t *key_len,
 543                           const char *key_file, size_t key_offset,
 544                           size_t key_size)
 545 {
 546         return crypt_get_key(msg, key, key_len, key_offset, key_size, key_file,
 547                              cd->timeout, 0, cd);
 548 }
 549
 550 void crypt_set_log_callback(struct crypt_device *cd,
 551         void (*log)(int level, const char *msg, void *usrptr),
 552         void *usrptr)
 553 {
 554         if (!cd)
 555                 _default_log = log;
 556         else {
 557                 cd->log = log;
 558                 cd->log_usrptr = usrptr;
 559         }
 560 }
 561
 562 void crypt_set_confirm_callback(struct crypt_device *cd,
 563         int (*confirm)(const char *msg, void *usrptr),
 564         void *usrptr)
 565 {
 566         cd->confirm = confirm;
 567         cd->confirm_usrptr = usrptr;
 568 }
 569
 570 void crypt_set_password_callback(struct crypt_device *cd,
 571         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 572         void *usrptr)
 573 {
 574         cd->password = password;
 575         cd->password_usrptr = usrptr;
 576 }
 577
 578 static void _get_error(char *error, char *buf, size_t size)
 579 {
 580         if (!buf || size < 1)
 581                 error[0] = '\0';
 582         else if (*error) {
 583                 strncpy(buf, error, size - 1);
 584                 buf[size - 1] = '\0';
 585                 error[0] = '\0';
 586         } else
 587                 buf[0] = '\0';
 588 }
 589
 590 void crypt_last_error(struct crypt_device *cd, char *buf, size_t size)
 591 {
 592         if (cd)
 593                 return _get_error(cd->error, buf, size);
 594 }
 595
 596 /* Deprecated global error interface */
 597 void crypt_get_error(char *buf, size_t size)
 598 {
 599         return _get_error(global_error, buf, size);
 600 }
 601
 602 const char *crypt_get_dir(void)
 603 {
 604         return dm_get_dir();
 605 }
 606
 607 int crypt_init(struct crypt_device **cd, const char *device)
 608 {
 609         struct crypt_device *h = NULL;
 610         int r;
 611
 612         if (!cd)
 613                 return -EINVAL;
 614
 615         log_dbg("Allocating crypt device %s context.", device);
 616
 617         if (!(h = malloc(sizeof(struct crypt_device))))
 618                 return -ENOMEM;
 619
 620         memset(h, 0, sizeof(*h));
 621
 622         r = device_alloc(&h->device, device);
 623         if (r < 0)
 624                 goto bad;
 625
 626         dm_backend_init();
 627
 628         h->iteration_time = 1000;
 629         h->password_verify = 0;
 630         h->tries = 3;
 631         h->rng_type = crypt_random_default_key_rng();
 632         *cd = h;
 633         return 0;
 634 bad:
 635         device_free(h->device);
 636         free(h);
 637         return r;
 638 }
 639
 640 static int crypt_check_data_device_size(struct crypt_device *cd)
 641 {
 642         int r;
 643         uint64_t size, size_min;
 644
 645         /* Check data device size, require at least one sector */
 646         size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE;
 647
 648         r = device_size(cd->device, &size);
 649         if (r < 0)
 650                 return r;
 651
 652         if (size < size_min) {
 653                 log_err(cd, _("Header detected but device %s is too small.\n"),
 654                         device_path(cd->device));
 655                 return -EINVAL;
 656         }
 657
 658         return r;
 659 }
 660
 661 int crypt_set_data_device(struct crypt_device *cd, const char *device)
 662 {
 663         struct device *dev = NULL;
 664         int r;
 665
 666         log_dbg("Setting ciphertext data device to %s.", device ?: "(none)");
 667
 668         if (!isLUKS(cd->type) && !isVERITY(cd->type)) {
 669                 log_err(cd, _("This operation is not supported for this device type.\n"));
 670                 return  -EINVAL;
 671         }
 672
 673         /* metadata device must be set */
 674         if (!cd->device || !device)
 675                 return -EINVAL;
 676
 677         r = device_alloc(&dev, device);
 678         if (r < 0)
 679                 return r;
 680
 681         if (!cd->metadata_device) {
 682                 cd->metadata_device = cd->device;
 683         } else
 684                 device_free(cd->device);
 685
 686         cd->device = dev;
 687
 688         return crypt_check_data_device_size(cd);
 689 }
 690
 691 static int _crypt_load_luks1(struct crypt_device *cd, int require_header, int repair)
 692 {
 693         struct luks_phdr hdr;
 694         int r;
 695
 696         r = init_crypto(cd);
 697         if (r < 0)
 698                 return r;
 699
 700         r = LUKS_read_phdr(&hdr, require_header, repair, cd);
 701         if (r < 0)
 702                 return r;
 703
 704         if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1)))
 705                 return -ENOMEM;
 706
 707         memcpy(&cd->u.luks1.hdr, &hdr, sizeof(hdr));
 708
 709         return r;
 710 }
 711
 712 static int _crypt_load_tcrypt(struct crypt_device *cd, struct crypt_params_tcrypt *params)
 713 {
 714         int r;
 715
 716         if (!params)
 717                 return -EINVAL;
 718
 719         r = init_crypto(cd);
 720         if (r < 0)
 721                 return r;
 722
 723         memcpy(&cd->u.tcrypt.params, params, sizeof(*params));
 724
 725         r = TCRYPT_read_phdr(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
 726
 727         cd->u.tcrypt.params.passphrase = NULL;
 728         cd->u.tcrypt.params.passphrase_size = 0;
 729         cd->u.tcrypt.params.keyfiles = NULL;
 730         cd->u.tcrypt.params.keyfiles_count = 0;
 731
 732         if (r < 0)
 733                 return r;
 734
 735         if (!cd->type && !(cd->type = strdup(CRYPT_TCRYPT)))
 736                 return -ENOMEM;
 737
 738         return r;
 739 }
 740
 741 static int _crypt_load_verity(struct crypt_device *cd, struct crypt_params_verity *params)
 742 {
 743         int r;
 744         size_t sb_offset = 0;
 745
 746         r = init_crypto(cd);
 747         if (r < 0)
 748                 return r;
 749
 750         if (params && params->flags & CRYPT_VERITY_NO_HEADER)
 751                 return -EINVAL;
 752
 753         if (params)
 754                 sb_offset = params->hash_area_offset;
 755
 756         r = VERITY_read_sb(cd, sb_offset, &cd->u.verity.uuid, &cd->u.verity.hdr);
 757         if (r < 0)
 758                 return r;
 759
 760         if (params)
 761                 cd->u.verity.hdr.flags = params->flags;
 762
 763         /* Hash availability checked in sb load */
 764         cd->u.verity.root_hash_size = crypt_hash_size(cd->u.verity.hdr.hash_name);
 765         if (cd->u.verity.root_hash_size > 4096)
 766                 return -EINVAL;
 767
 768         if (!cd->type && !(cd->type = strdup(CRYPT_VERITY)))
 769                 return -ENOMEM;
 770
 771         if (params && params->data_device &&
 772             (r = crypt_set_data_device(cd, params->data_device)) < 0)
 773                 return r;
 774
 775         return r;
 776 }
 777
 778 static int _init_by_name_crypt(struct crypt_device *cd, const char *name)
 779 {
 780         struct crypt_dm_active_device dmd = {};
 781         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
 782         int key_nums, r;
 783
 784         r = dm_query_device(cd, name,
 785                         DM_ACTIVE_DEVICE |
 786                         DM_ACTIVE_UUID |
 787                         DM_ACTIVE_CRYPT_CIPHER |
 788                         DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
 789         if (r < 0)
 790                 goto out;
 791         if (r > 0)
 792                 r = 0;
 793
 794         if (isPLAIN(cd->type)) {
 795                 cd->u.plain.hdr.hash = NULL; /* no way to get this */
 796                 cd->u.plain.hdr.offset = dmd.u.crypt.offset;
 797                 cd->u.plain.hdr.skip = dmd.u.crypt.iv_offset;
 798                 cd->u.plain.key_size = dmd.u.crypt.vk->keylength;
 799
 800                 r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher, NULL, cipher_mode);
 801                 if (!r) {
 802                         cd->u.plain.cipher = strdup(cipher);
 803                         cd->u.plain.cipher_mode = strdup(cipher_mode);
 804                 }
 805         } else if (isLOOPAES(cd->type)) {
 806                 cd->u.loopaes.hdr.offset = dmd.u.crypt.offset;
 807
 808                 r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher,
 809                                               &key_nums, cipher_mode);
 810                 if (!r) {
 811                         cd->u.loopaes.cipher = strdup(cipher);
 812                         cd->u.loopaes.cipher_mode = strdup(cipher_mode);
 813                         /* version 3 uses last key for IV */
 814                         if (dmd.u.crypt.vk->keylength % key_nums)
 815                                 key_nums++;
 816                         cd->u.loopaes.key_size = dmd.u.crypt.vk->keylength / key_nums;
 817                 }
 818         } else if (isLUKS(cd->type)) {
 819                 if (crypt_metadata_device(cd)) {
 820                         r = _crypt_load_luks1(cd, 0, 0);
 821                         if (r < 0) {
 822                                 log_dbg("LUKS device header does not match active device.");
 823                                 crypt_set_null_type(cd);
 824                                 r = 0;
 825                                 goto out;
 826                         }
 827                         /* check whether UUIDs match each other */
 828                         r = crypt_uuid_cmp(dmd.uuid, cd->u.luks1.hdr.uuid);
 829                         if (r < 0) {
 830                                 log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s",
 831                                         cd->u.luks1.hdr.uuid, dmd.uuid);
 832                                 crypt_set_null_type(cd);
 833                                 r = 0;
 834                         }
 835                 } else {
 836                         log_dbg("LUKS device header not available.");
 837                         crypt_set_null_type(cd);
 838                         r = 0;
 839                 }
 840         } else if (isTCRYPT(cd->type)) {
 841                 r = TCRYPT_init_by_name(cd, name, &dmd, &cd->device,
 842                                         &cd->u.tcrypt.params, &cd->u.tcrypt.hdr);
 843         }
 844 out:
 845         crypt_free_volume_key(dmd.u.crypt.vk);
 846         device_free(dmd.data_device);
 847         free(CONST_CAST(void*)dmd.u.crypt.cipher);
 848         free(CONST_CAST(void*)dmd.uuid);
 849         return r;
 850 }
 851
 852 static int _init_by_name_verity(struct crypt_device *cd, const char *name)
 853 {
 854         struct crypt_params_verity params = {};
 855         struct crypt_dm_active_device dmd = {
 856                 .target = DM_VERITY,
 857                 .u.verity.vp = &params,
 858         };
 859         int r;
 860
 861         r = dm_query_device(cd, name,
 862                                 DM_ACTIVE_DEVICE |
 863                                 DM_ACTIVE_VERITY_HASH_DEVICE |
 864                                 DM_ACTIVE_VERITY_PARAMS, &dmd);
 865         if (r < 0)
 866                 goto out;
 867         if (r > 0)
 868                 r = 0;
 869
 870         if (isVERITY(cd->type)) {
 871                 cd->u.verity.uuid = NULL; // FIXME
 872                 cd->u.verity.hdr.flags = CRYPT_VERITY_NO_HEADER; //FIXME
 873                 cd->u.verity.hdr.data_size = params.data_size;
 874                 cd->u.verity.root_hash_size = dmd.u.verity.root_hash_size;
 875                 cd->u.verity.root_hash = NULL;
 876                 cd->u.verity.hdr.hash_name = params.hash_name;
 877                 cd->u.verity.hdr.data_device = NULL;
 878                 cd->u.verity.hdr.hash_device = NULL;
 879                 cd->u.verity.hdr.data_block_size = params.data_block_size;
 880                 cd->u.verity.hdr.hash_block_size = params.hash_block_size;
 881                 cd->u.verity.hdr.hash_area_offset = dmd.u.verity.hash_offset;
 882                 cd->u.verity.hdr.hash_type = params.hash_type;
 883                 cd->u.verity.hdr.flags = params.flags;
 884                 cd->u.verity.hdr.salt_size = params.salt_size;
 885                 cd->u.verity.hdr.salt = params.salt;
 886                 cd->metadata_device = dmd.u.verity.hash_device;
 887         }
 888 out:
 889         device_free(dmd.data_device);
 890         return r;
 891 }
 892
 893 int crypt_init_by_name_and_header(struct crypt_device **cd,
 894                                   const char *name,
 895                                   const char *header_device)
 896 {
 897         crypt_status_info ci;
 898         struct crypt_dm_active_device dmd;
 899         int r;
 900
 901         log_dbg("Allocating crypt device context by device %s.", name);
 902
 903         ci = crypt_status(NULL, name);
 904         if (ci == CRYPT_INVALID)
 905                 return -ENODEV;
 906
 907         if (ci < CRYPT_ACTIVE) {
 908                 log_err(NULL, _("Device %s is not active.\n"), name);
 909                 return -ENODEV;
 910         }
 911
 912         r = dm_query_device(NULL, name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd);
 913         if (r < 0)
 914                 goto out;
 915
 916         *cd = NULL;
 917
 918         if (header_device) {
 919                 r = crypt_init(cd, header_device);
 920         } else {
 921                 r = crypt_init(cd, device_path(dmd.data_device));
 922
 923                 /* Underlying device disappeared but mapping still active */
 924                 if (!dmd.data_device || r == -ENOTBLK)
 925                         log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
 926                                     name);
 927
 928                 /* Underlying device is not readable but crypt mapping exists */
 929                 if (r == -ENOTBLK) {
 930                         device_free(dmd.data_device);
 931                         dmd.data_device = NULL;
 932                         r = crypt_init(cd, NULL);
 933                 }
 934         }
 935
 936         if (r < 0)
 937                 goto out;
 938
 939         if (dmd.uuid) {
 940                 if (!strncmp(CRYPT_PLAIN, dmd.uuid, sizeof(CRYPT_PLAIN)-1))
 941                         (*cd)->type = strdup(CRYPT_PLAIN);
 942                 else if (!strncmp(CRYPT_LOOPAES, dmd.uuid, sizeof(CRYPT_LOOPAES)-1))
 943                         (*cd)->type = strdup(CRYPT_LOOPAES);
 944                 else if (!strncmp(CRYPT_LUKS1, dmd.uuid, sizeof(CRYPT_LUKS1)-1))
 945                         (*cd)->type = strdup(CRYPT_LUKS1);
 946                 else if (!strncmp(CRYPT_VERITY, dmd.uuid, sizeof(CRYPT_VERITY)-1))
 947                         (*cd)->type = strdup(CRYPT_VERITY);
 948                 else if (!strncmp(CRYPT_TCRYPT, dmd.uuid, sizeof(CRYPT_TCRYPT)-1))
 949                         (*cd)->type = strdup(CRYPT_TCRYPT);
 950                 else
 951                         log_dbg("Unknown UUID set, some parameters are not set.");
 952         } else
 953                 log_dbg("Active device has no UUID set, some parameters are not set.");
 954
 955         if (header_device) {
 956                 r = crypt_set_data_device(*cd, device_path(dmd.data_device));
 957                 if (r < 0)
 958                         goto out;
 959         }
 960
 961         /* Try to initialise basic parameters from active device */
 962
 963         if (dmd.target == DM_CRYPT)
 964                 r = _init_by_name_crypt(*cd, name);
 965         else if (dmd.target == DM_VERITY)
 966                 r = _init_by_name_verity(*cd, name);
 967 out:
 968         if (r < 0) {
 969                 crypt_free(*cd);
 970                 *cd = NULL;
 971         } else if (!(*cd)->type && name) {
 972                 /* For anonymous device (no header found) remember initialized name */
 973                 (*cd)->u.none.active_name = strdup(name);
 974         }
 975
 976         device_free(dmd.data_device);
 977         free(CONST_CAST(void*)dmd.uuid);
 978         return r;
 979 }
 980
 981 int crypt_init_by_name(struct crypt_device **cd, const char *name)
 982 {
 983         return crypt_init_by_name_and_header(cd, name, NULL);
 984 }
 985
 986 static int _crypt_format_plain(struct crypt_device *cd,
 987                                const char *cipher,
 988                                const char *cipher_mode,
 989                                const char *uuid,
 990                                size_t volume_key_size,
 991                                struct crypt_params_plain *params)
 992 {
 993         if (!cipher || !cipher_mode) {
 994                 log_err(cd, _("Invalid plain crypt parameters.\n"));
 995                 return -EINVAL;
 996         }
 997
 998         if (volume_key_size > 1024) {
 999                 log_err(cd, _("Invalid key size.\n"));
1000                 return -EINVAL;
1001         }
1002
1003         if (uuid) {
1004                 log_err(cd, _("UUID is not supported for this crypt type.\n"));
1005                 return -EINVAL;
1006         }
1007
1008         if (!(cd->type = strdup(CRYPT_PLAIN)))
1009                 return -ENOMEM;
1010
1011         cd->u.plain.key_size = volume_key_size;
1012         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
1013         if (!cd->volume_key)
1014                 return -ENOMEM;
1015
1016         cd->u.plain.cipher = strdup(cipher);
1017         cd->u.plain.cipher_mode = strdup(cipher_mode);
1018
1019
1020         if (params && params->hash)
1021                 cd->u.plain.hdr.hash = strdup(params->hash);
1022
1023         cd->u.plain.hdr.offset = params ? params->offset : 0;
1024         cd->u.plain.hdr.skip = params ? params->skip : 0;
1025         cd->u.plain.hdr.size = params ? params->size : 0;
1026
1027         if (!cd->u.plain.cipher || !cd->u.plain.cipher_mode)
1028                 return -ENOMEM;
1029
1030         return 0;
1031 }
1032
1033 static int _crypt_format_luks1(struct crypt_device *cd,
1034                                const char *cipher,
1035                                const char *cipher_mode,
1036                                const char *uuid,
1037                                const char *volume_key,
1038                                size_t volume_key_size,
1039                                struct crypt_params_luks1 *params)
1040 {
1041         int r;
1042         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1043         unsigned long alignment_offset = 0;
1044
1045         if (!crypt_metadata_device(cd)) {
1046                 log_err(cd, _("Can't format LUKS without device.\n"));
1047                 return -EINVAL;
1048         }
1049
1050         if (!(cd->type = strdup(CRYPT_LUKS1)))
1051                 return -ENOMEM;
1052
1053         if (volume_key)
1054                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
1055                                                       volume_key);
1056         else
1057                 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
1058
1059         if(!cd->volume_key)
1060                 return -ENOMEM;
1061
1062         if (params && params->data_device) {
1063                 cd->metadata_device = cd->device;
1064                 cd->device = NULL;
1065                 if (device_alloc(&cd->device, params->data_device) < 0)
1066                         return -ENOMEM;
1067                 required_alignment = params->data_alignment * SECTOR_SIZE;
1068         } else if (params && params->data_alignment) {
1069                 required_alignment = params->data_alignment * SECTOR_SIZE;
1070         } else
1071                 device_topology_alignment(cd->device,
1072                                        &required_alignment,
1073                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1074
1075         r = LUKS_generate_phdr(&cd->u.luks1.hdr, cd->volume_key, cipher, cipher_mode,
1076                                (params && params->hash) ? params->hash : "sha1",
1077                                uuid, LUKS_STRIPES,
1078                                required_alignment / SECTOR_SIZE,
1079                                alignment_offset / SECTOR_SIZE,
1080                                cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec,
1081                                cd->metadata_device ? 1 : 0, cd);
1082         if(r < 0)
1083                 return r;
1084
1085         /* Wipe first 8 sectors - fs magic numbers etc. */
1086         r = crypt_wipe(crypt_metadata_device(cd), 0, 8 * SECTOR_SIZE, CRYPT_WIPE_ZERO, 1);
1087         if(r < 0) {
1088                 if (r == -EBUSY)
1089                         log_err(cd, _("Cannot format device %s which is still in use.\n"),
1090                                 mdata_device_path(cd));
1091                 else if (r == -EACCES) {
1092                         log_err(cd, _("Cannot format device %s, permission denied.\n"),
1093                                 mdata_device_path(cd));
1094                         r = -EINVAL;
1095                 } else
1096                         log_err(cd, _("Cannot wipe header on device %s.\n"),
1097                                 mdata_device_path(cd));
1098
1099                 return r;
1100         }
1101
1102         r = LUKS_write_phdr(&cd->u.luks1.hdr, cd);
1103
1104         return r;
1105 }
1106
1107 static int _crypt_format_loopaes(struct crypt_device *cd,
1108                                  const char *cipher,
1109                                  const char *uuid,
1110                                  size_t volume_key_size,
1111                                  struct crypt_params_loopaes *params)
1112 {
1113         if (!crypt_metadata_device(cd)) {
1114                 log_err(cd, _("Can't format LOOPAES without device.\n"));
1115                 return -EINVAL;
1116         }
1117
1118         if (volume_key_size > 1024) {
1119                 log_err(cd, _("Invalid key size.\n"));
1120                 return -EINVAL;
1121         }
1122
1123         if (uuid) {
1124                 log_err(cd, _("UUID is not supported for this crypt type.\n"));
1125                 return -EINVAL;
1126         }
1127
1128         if (!(cd->type = strdup(CRYPT_LOOPAES)))
1129                 return -ENOMEM;
1130
1131         cd->u.loopaes.key_size = volume_key_size;
1132
1133         cd->u.loopaes.cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
1134
1135         if (params && params->hash)
1136                 cd->u.loopaes.hdr.hash = strdup(params->hash);
1137
1138         cd->u.loopaes.hdr.offset = params ? params->offset : 0;
1139         cd->u.loopaes.hdr.skip = params ? params->skip : 0;
1140
1141         return 0;
1142 }
1143
1144 static int _crypt_format_verity(struct crypt_device *cd,
1145                                  const char *uuid,
1146                                  struct crypt_params_verity *params)
1147 {
1148         int r = 0, hash_size;
1149         uint64_t data_device_size;
1150
1151         if (!crypt_metadata_device(cd)) {
1152                 log_err(cd, _("Can't format VERITY without device.\n"));
1153                 return -EINVAL;
1154         }
1155
1156         if (!params || !params->data_device)
1157                 return -EINVAL;
1158
1159         if (params->hash_type > VERITY_MAX_HASH_TYPE) {
1160                 log_err(cd, _("Unsupported VERITY hash type %d.\n"), params->hash_type);
1161                 return -EINVAL;
1162         }
1163
1164         if (VERITY_BLOCK_SIZE_OK(params->data_block_size) ||
1165             VERITY_BLOCK_SIZE_OK(params->hash_block_size)) {
1166                 log_err(cd, _("Unsupported VERITY block size.\n"));
1167                 return -EINVAL;
1168         }
1169
1170         if (params->hash_area_offset % 512) {
1171                 log_err(cd, _("Unsupported VERITY hash offset.\n"));
1172                 return -EINVAL;
1173         }
1174
1175         if (!(cd->type = strdup(CRYPT_VERITY)))
1176                 return -ENOMEM;
1177
1178         r = crypt_set_data_device(cd, params->data_device);
1179         if (r)
1180                 return r;
1181         if (!params->data_size) {
1182                 r = device_size(cd->device, &data_device_size);
1183                 if (r < 0)
1184                         return r;
1185
1186                 cd->u.verity.hdr.data_size = data_device_size / params->data_block_size;
1187         } else
1188                 cd->u.verity.hdr.data_size = params->data_size;
1189
1190         hash_size = crypt_hash_size(params->hash_name);
1191         if (hash_size <= 0) {
1192                 log_err(cd, _("Hash algorithm %s not supported.\n"),
1193                         params->hash_name);
1194                 return -EINVAL;
1195         }
1196         cd->u.verity.root_hash_size = hash_size;
1197
1198         cd->u.verity.root_hash = malloc(cd->u.verity.root_hash_size);
1199         if (!cd->u.verity.root_hash)
1200                 return -ENOMEM;
1201
1202         cd->u.verity.hdr.flags = params->flags;
1203         if (!(cd->u.verity.hdr.hash_name = strdup(params->hash_name)))
1204                 return -ENOMEM;
1205         cd->u.verity.hdr.data_device = NULL;
1206         cd->u.verity.hdr.data_block_size = params->data_block_size;
1207         cd->u.verity.hdr.hash_block_size = params->hash_block_size;
1208         cd->u.verity.hdr.hash_area_offset = params->hash_area_offset;
1209         cd->u.verity.hdr.hash_type = params->hash_type;
1210         cd->u.verity.hdr.flags = params->flags;
1211         cd->u.verity.hdr.salt_size = params->salt_size;
1212         if (!(cd->u.verity.hdr.salt = malloc(params->salt_size)))
1213                 return -ENOMEM;
1214
1215         if (params->salt)
1216                 memcpy(CONST_CAST(char*)cd->u.verity.hdr.salt, params->salt,
1217                        params->salt_size);
1218         else
1219                 r = crypt_random_get(cd, CONST_CAST(char*)cd->u.verity.hdr.salt,
1220                                      params->salt_size, CRYPT_RND_SALT);
1221         if (r)
1222                 return r;
1223
1224         if (params->flags & CRYPT_VERITY_CREATE_HASH) {
1225                 r = VERITY_create(cd, &cd->u.verity.hdr,
1226                                   cd->u.verity.root_hash, cd->u.verity.root_hash_size);
1227                 if (r)
1228                         return r;
1229         }
1230
1231         if (!(params->flags & CRYPT_VERITY_NO_HEADER)) {
1232                 if (uuid)
1233                         cd->u.verity.uuid = strdup(uuid);
1234                 else {
1235                         r = VERITY_UUID_generate(cd, &cd->u.verity.uuid);
1236                         if (r)
1237                                 return r;
1238                 }
1239
1240                 r = VERITY_write_sb(cd, cd->u.verity.hdr.hash_area_offset,
1241                                     cd->u.verity.uuid,
1242                                     &cd->u.verity.hdr);
1243         }
1244         return r;
1245 }
1246
1247 int crypt_format(struct crypt_device *cd,
1248         const char *type,
1249         const char *cipher,
1250         const char *cipher_mode,
1251         const char *uuid,
1252         const char *volume_key,
1253         size_t volume_key_size,
1254         void *params)
1255 {
1256         int r;
1257
1258         if (!type)
1259                 return -EINVAL;
1260
1261         if (cd->type) {
1262                 log_dbg("Context already formatted as %s.", cd->type);
1263                 return -EINVAL;
1264         }
1265
1266         log_dbg("Formatting device %s as type %s.", mdata_device_path(cd) ?: "(none)", type);
1267
1268         crypt_reset_null_type(cd);
1269
1270         r = init_crypto(cd);
1271         if (r < 0)
1272                 return r;
1273
1274         if (isPLAIN(type))
1275                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1276                                         uuid, volume_key_size, params);
1277         else if (isLUKS(type))
1278                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1279                                         uuid, volume_key, volume_key_size, params);
1280         else if (isLOOPAES(type))
1281                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1282         else if (isVERITY(type))
1283                 r = _crypt_format_verity(cd, uuid, params);
1284         else {
1285                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1286                 r = -EINVAL;
1287         }
1288
1289         if (r < 0) {
1290                 crypt_set_null_type(cd);
1291                 crypt_free_volume_key(cd->volume_key);
1292                 cd->volume_key = NULL;
1293         }
1294
1295         return r;
1296 }
1297
1298 int crypt_load(struct crypt_device *cd,
1299                const char *requested_type,
1300                void *params)
1301 {
1302         int r;
1303
1304         log_dbg("Trying to load %s crypt type from device %s.",
1305                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1306
1307         if (!crypt_metadata_device(cd))
1308                 return -EINVAL;
1309
1310         crypt_reset_null_type(cd);
1311
1312         if (!requested_type || isLUKS(requested_type)) {
1313                 if (cd->type && !isLUKS(cd->type)) {
1314                         log_dbg("Context is already initialised to type %s", cd->type);
1315                         return -EINVAL;
1316                 }
1317
1318                 r = _crypt_load_luks1(cd, 1, 0);
1319         } else if (isVERITY(requested_type)) {
1320                 if (cd->type && !isVERITY(cd->type)) {
1321                         log_dbg("Context is already initialised to type %s", cd->type);
1322                         return -EINVAL;
1323                 }
1324                 r = _crypt_load_verity(cd, params);
1325         } else if (isTCRYPT(requested_type)) {
1326                 if (cd->type && !isTCRYPT(cd->type)) {
1327                         log_dbg("Context is already initialised to type %s", cd->type);
1328                         return -EINVAL;
1329                 }
1330                 r = _crypt_load_tcrypt(cd, params);
1331         } else
1332                 return -EINVAL;
1333
1334         return r;
1335 }
1336
1337 int crypt_repair(struct crypt_device *cd,
1338                  const char *requested_type,
1339                  void *params __attribute__((unused)))
1340 {
1341         int r;
1342
1343         log_dbg("Trying to repair %s crypt type from device %s.",
1344                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1345
1346         if (!crypt_metadata_device(cd))
1347                 return -EINVAL;
1348
1349         if (requested_type && !isLUKS(requested_type))
1350                 return -EINVAL;
1351
1352
1353         /* Load with repair */
1354         r = _crypt_load_luks1(cd, 1, 1);
1355         if (r < 0)
1356                 return r;
1357
1358         /* cd->type and header must be set in context */
1359         r = crypt_check_data_device_size(cd);
1360         if (r < 0)
1361                 crypt_set_null_type(cd);
1362
1363         return r;
1364 }
1365
1366 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1367 {
1368         struct crypt_dm_active_device dmd;
1369         int r;
1370
1371         /* Device context type must be initialised */
1372         if (!cd->type)
1373                 return -EINVAL;
1374
1375         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1376
1377         r = dm_query_device(cd, name, DM_ACTIVE_DEVICE | DM_ACTIVE_CRYPT_CIPHER |
1378                                   DM_ACTIVE_UUID | DM_ACTIVE_CRYPT_KEYSIZE |
1379                                   DM_ACTIVE_CRYPT_KEY, &dmd);
1380         if (r < 0) {
1381                 log_err(NULL, _("Device %s is not active.\n"), name);
1382                 return -EINVAL;
1383         }
1384
1385         if (!dmd.uuid || dmd.target != DM_CRYPT) {
1386                 r = -EINVAL;
1387                 goto out;
1388         }
1389
1390         r = device_block_adjust(cd, dmd.data_device, DEV_OK,
1391                                 dmd.u.crypt.offset, &new_size, &dmd.flags);
1392         if (r)
1393                 goto out;
1394
1395         if (new_size == dmd.size) {
1396                 log_dbg("Device has already requested size %" PRIu64
1397                         " sectors.", dmd.size);
1398                 r = 0;
1399         } else {
1400                 dmd.size = new_size;
1401                 if (isTCRYPT(cd->type))
1402                         r = -ENOTSUP;
1403                 else
1404                         r = dm_create_device(cd, name, cd->type, &dmd, 1);
1405         }
1406 out:
1407         if (dmd.target == DM_CRYPT) {
1408                 crypt_free_volume_key(dmd.u.crypt.vk);
1409                 free(CONST_CAST(void*)dmd.u.crypt.cipher);
1410         }
1411         free(CONST_CAST(void*)dmd.data_device);
1412         free(CONST_CAST(void*)dmd.uuid);
1413
1414         return r;
1415 }
1416
1417 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1418 {
1419         if (!isLUKS(cd->type)) {
1420                 log_err(cd, _("This operation is not supported for this device type.\n"));
1421                 return  -EINVAL;
1422         }
1423
1424         if (uuid && !strncmp(uuid, cd->u.luks1.hdr.uuid, sizeof(cd->u.luks1.hdr.uuid))) {
1425                 log_dbg("UUID is the same as requested (%s) for device %s.",
1426                         uuid, mdata_device_path(cd));
1427                 return 0;
1428         }
1429
1430         if (uuid)
1431                 log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device_path(cd));
1432         else
1433                 log_dbg("Requested new UUID refresh for %s.", mdata_device_path(cd));
1434
1435         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1436                 return -EPERM;
1437
1438         return LUKS_hdr_uuid_set(&cd->u.luks1.hdr, uuid, cd);
1439 }
1440
1441 int crypt_header_backup(struct crypt_device *cd,
1442                         const char *requested_type,
1443                         const char *backup_file)
1444 {
1445         int r;
1446
1447         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1448                 return -EINVAL;
1449
1450         if (cd->type && !isLUKS(cd->type))
1451                 return -EINVAL;
1452
1453         r = init_crypto(cd);
1454         if (r < 0)
1455                 return r;
1456
1457         log_dbg("Requested header backup of device %s (%s) to "
1458                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1459
1460         r = LUKS_hdr_backup(backup_file, cd);
1461         return r;
1462 }
1463
1464 int crypt_header_restore(struct crypt_device *cd,
1465                          const char *requested_type,
1466                          const char *backup_file)
1467 {
1468         struct luks_phdr hdr;
1469         int r;
1470
1471         if (requested_type && !isLUKS(requested_type))
1472                 return -EINVAL;
1473
1474         if (cd->type && !isLUKS(cd->type))
1475                 return -EINVAL;
1476
1477         r = init_crypto(cd);
1478         if (r < 0)
1479                 return r;
1480
1481         log_dbg("Requested header restore to device %s (%s) from "
1482                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1483
1484         r = LUKS_hdr_restore(backup_file, isLUKS(cd->type) ? &cd->u.luks1.hdr : &hdr, cd);
1485
1486         crypt_memzero(&hdr, sizeof(hdr));
1487         return r;
1488 }
1489
1490 void crypt_free(struct crypt_device *cd)
1491 {
1492         if (cd) {
1493                 log_dbg("Releasing crypt device %s context.", mdata_device_path(cd));
1494
1495                 dm_backend_exit();
1496                 crypt_free_volume_key(cd->volume_key);
1497
1498                 device_free(cd->device);
1499                 device_free(cd->metadata_device);
1500
1501                 if (isPLAIN(cd->type)) {
1502                         free(CONST_CAST(void*)cd->u.plain.hdr.hash);
1503                         free(cd->u.plain.cipher);
1504                         free(cd->u.plain.cipher_mode);
1505                 } else if (isLOOPAES(cd->type)) {
1506                         free(CONST_CAST(void*)cd->u.loopaes.hdr.hash);
1507                         free(cd->u.loopaes.cipher);
1508                 } else if (isVERITY(cd->type)) {
1509                         free(CONST_CAST(void*)cd->u.verity.hdr.hash_name);
1510                         free(CONST_CAST(void*)cd->u.verity.hdr.salt);
1511                         free(cd->u.verity.root_hash);
1512                         free(cd->u.verity.uuid);
1513                 } else if (!cd->type) {
1514                         free(cd->u.none.active_name);
1515                 }
1516
1517                 free(cd->type);
1518                 /* Some structures can contain keys (TCRYPT), wipe it */
1519                 crypt_memzero(cd, sizeof(*cd));
1520                 free(cd);
1521         }
1522 }
1523
1524 int crypt_suspend(struct crypt_device *cd,
1525                   const char *name)
1526 {
1527         crypt_status_info ci;
1528         int r;
1529
1530         log_dbg("Suspending volume %s.", name);
1531
1532         if (cd->type) {
1533                 r = onlyLUKS(cd);
1534         } else {
1535                 r = crypt_uuid_type_cmp(cd, CRYPT_LUKS1);
1536                 if (r < 0)
1537                         log_err(cd, _("This operation is supported only for LUKS device.\n"));
1538         }
1539
1540         if (r < 0)
1541                 return r;
1542
1543         ci = crypt_status(NULL, name);
1544         if (ci < CRYPT_ACTIVE) {
1545                 log_err(cd, _("Volume %s is not active.\n"), name);
1546                 return -EINVAL;
1547         }
1548
1549         dm_backend_init();
1550
1551         r = dm_status_suspended(cd, name);
1552         if (r < 0)
1553                 goto out;
1554
1555         if (r) {
1556                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1557                 r = -EINVAL;
1558                 goto out;
1559         }
1560
1561         r = dm_suspend_and_wipe_key(cd, name);
1562         if (r == -ENOTSUP)
1563                 log_err(cd, _("Suspend is not supported for device %s.\n"), name);
1564         else if (r)
1565                 log_err(cd, _("Error during suspending device %s.\n"), name);
1566 out:
1567         dm_backend_exit();
1568         return r;
1569 }
1570
1571 int crypt_resume_by_passphrase(struct crypt_device *cd,
1572                                const char *name,
1573                                int keyslot,
1574                                const char *passphrase,
1575                                size_t passphrase_size)
1576 {
1577         struct volume_key *vk = NULL;
1578         int r;
1579
1580         log_dbg("Resuming volume %s.", name);
1581
1582         r = onlyLUKS(cd);
1583         if (r < 0)
1584                 return r;
1585
1586         r = dm_status_suspended(cd, name);
1587         if (r < 0)
1588                 return r;
1589
1590         if (!r) {
1591                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1592                 return -EINVAL;
1593         }
1594
1595         if (passphrase) {
1596                 r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size,
1597                                            &cd->u.luks1.hdr, &vk, cd);
1598         } else
1599                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1600
1601         if (r >= 0) {
1602                 keyslot = r;
1603                 r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
1604                 if (r == -ENOTSUP)
1605                         log_err(cd, _("Resume is not supported for device %s.\n"), name);
1606                 else if (r)
1607                         log_err(cd, _("Error during resuming device %s.\n"), name);
1608         } else
1609                 r = keyslot;
1610
1611         crypt_free_volume_key(vk);
1612         return r < 0 ? r : keyslot;
1613 }
1614
1615 int crypt_resume_by_keyfile_offset(struct crypt_device *cd,
1616                                    const char *name,
1617                                    int keyslot,
1618                                    const char *keyfile,
1619                                    size_t keyfile_size,
1620                                    size_t keyfile_offset)
1621 {
1622         struct volume_key *vk = NULL;
1623         char *passphrase_read = NULL;
1624         size_t passphrase_size_read;
1625         int r;
1626
1627         log_dbg("Resuming volume %s.", name);
1628
1629         r = onlyLUKS(cd);
1630         if (r < 0)
1631                 return r;
1632
1633         r = dm_status_suspended(cd, name);
1634         if (r < 0)
1635                 return r;
1636
1637         if (!r) {
1638                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1639                 return -EINVAL;
1640         }
1641
1642         if (!keyfile)
1643                 return -EINVAL;
1644
1645         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1646                           &passphrase_size_read, keyfile, keyfile_offset,
1647                           keyfile_size);
1648         if (r < 0)
1649                 goto out;
1650
1651         r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
1652                                    passphrase_size_read, &cd->u.luks1.hdr, &vk, cd);
1653         if (r < 0)
1654                 goto out;
1655
1656         keyslot = r;
1657         r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
1658         if (r)
1659                 log_err(cd, _("Error during resuming device %s.\n"), name);
1660 out:
1661         crypt_safe_free(passphrase_read);
1662         crypt_free_volume_key(vk);
1663         return r < 0 ? r : keyslot;
1664 }
1665
1666 int crypt_resume_by_keyfile(struct crypt_device *cd,
1667                             const char *name,
1668                             int keyslot,
1669                             const char *keyfile,
1670                             size_t keyfile_size)
1671 {
1672         return crypt_resume_by_keyfile_offset(cd, name, keyslot,
1673                                               keyfile, keyfile_size, 0);
1674 }
1675
1676 // slot manipulation
1677 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1678         int keyslot, // -1 any
1679         const char *passphrase, // NULL -> terminal
1680         size_t passphrase_size,
1681         const char *new_passphrase, // NULL -> terminal
1682         size_t new_passphrase_size)
1683 {
1684         struct volume_key *vk = NULL;
1685         char *password = NULL, *new_password = NULL;
1686         size_t passwordLen, new_passwordLen;
1687         int r;
1688
1689         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1690                 "new passphrase %sprovided.",
1691                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1692
1693         r = onlyLUKS(cd);
1694         if (r < 0)
1695                 return r;
1696
1697         r = keyslot_verify_or_find_empty(cd, &keyslot);
1698         if (r)
1699                 return r;
1700
1701         if (!LUKS_keyslot_active_count(&cd->u.luks1.hdr)) {
1702                 /* No slots used, try to use pre-generated key in header */
1703                 if (cd->volume_key) {
1704                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1705                         r = vk ? 0 : -ENOMEM;
1706                 } else {
1707                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1708                         return -EINVAL;
1709                 }
1710         } else if (passphrase) {
1711                 /* Passphrase provided, use it to unlock existing keyslot */
1712                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase,
1713                                            passphrase_size, &cd->u.luks1.hdr, &vk, cd);
1714         } else {
1715                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1716                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1717                                       &password, &passwordLen, 0);
1718                 if (r < 0)
1719                         goto out;
1720
1721                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password,
1722                                            passwordLen, &cd->u.luks1.hdr, &vk, cd);
1723                 crypt_safe_free(password);
1724         }
1725
1726         if(r < 0)
1727                 goto out;
1728
1729         if (new_passphrase) {
1730                 new_password = CONST_CAST(char*)new_passphrase;
1731                 new_passwordLen = new_passphrase_size;
1732         } else {
1733                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1734                                       &new_password, &new_passwordLen, 1);
1735                 if(r < 0)
1736                         goto out;
1737         }
1738
1739         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1740                          &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
1741         if(r < 0)
1742                 goto out;
1743
1744         r = 0;
1745 out:
1746         if (!new_passphrase)
1747                 crypt_safe_free(new_password);
1748         crypt_free_volume_key(vk);
1749         return r < 0 ? r : keyslot;
1750 }
1751
1752 int crypt_keyslot_change_by_passphrase(struct crypt_device *cd,
1753         int keyslot_old,
1754         int keyslot_new,
1755         const char *passphrase,
1756         size_t passphrase_size,
1757         const char *new_passphrase,
1758         size_t new_passphrase_size)
1759 {
1760         struct volume_key *vk = NULL;
1761         int r;
1762
1763         log_dbg("Changing passphrase from old keyslot %d to new %d.",
1764                 keyslot_old, keyslot_new);
1765
1766         r = onlyLUKS(cd);
1767         if (r < 0)
1768                 return r;
1769
1770         r = LUKS_open_key_with_hdr(keyslot_old, passphrase, passphrase_size,
1771                                    &cd->u.luks1.hdr, &vk, cd);
1772         if (r < 0)
1773                 goto out;
1774
1775         if (keyslot_old != CRYPT_ANY_SLOT && keyslot_old != r) {
1776                 log_dbg("Keyslot mismatch.");
1777                 goto out;
1778         }
1779         keyslot_old = r;
1780
1781         if (keyslot_new == CRYPT_ANY_SLOT) {
1782                 keyslot_new = LUKS_keyslot_find_empty(&cd->u.luks1.hdr);
1783                 if (keyslot_new < 0)
1784                         keyslot_new = keyslot_old;
1785         }
1786
1787         if (keyslot_old == keyslot_new) {
1788                 log_dbg("Key slot %d is going to be overwritten.", keyslot_old);
1789                 (void)crypt_keyslot_destroy(cd, keyslot_old);
1790         }
1791
1792         r = LUKS_set_key(keyslot_new, new_passphrase, new_passphrase_size,
1793                          &cd->u.luks1.hdr, vk, cd->iteration_time,
1794                          &cd->u.luks1.PBKDF2_per_sec, cd);
1795
1796         if (keyslot_old == keyslot_new) {
1797                 if (r >= 0)
1798                         log_verbose(cd, _("Key slot %d changed.\n"), keyslot_new);
1799         } else {
1800                 if (r >= 0) {
1801                         log_verbose(cd, _("Replaced with key slot %d.\n"), keyslot_new);
1802                         r = crypt_keyslot_destroy(cd, keyslot_old);
1803                 }
1804         }
1805         if (r < 0)
1806                 log_err(cd, _("Failed to swap new key slot.\n"));
1807 out:
1808         crypt_free_volume_key(vk);
1809         return r < 0 ? r : keyslot_new;
1810 }
1811
1812 int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
1813         int keyslot,
1814         const char *keyfile,
1815         size_t keyfile_size,
1816         size_t keyfile_offset,
1817         const char *new_keyfile,
1818         size_t new_keyfile_size,
1819         size_t new_keyfile_offset)
1820 {
1821         struct volume_key *vk = NULL;
1822         char *password = NULL; size_t passwordLen;
1823         char *new_password = NULL; size_t new_passwordLen;
1824         int r;
1825
1826         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1827                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1828
1829         r = onlyLUKS(cd);
1830         if (r < 0)
1831                 return r;
1832
1833         r = keyslot_verify_or_find_empty(cd, &keyslot);
1834         if (r)
1835                 return r;
1836
1837         if (!LUKS_keyslot_active_count(&cd->u.luks1.hdr)) {
1838                 /* No slots used, try to use pre-generated key in header */
1839                 if (cd->volume_key) {
1840                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1841                         r = vk ? 0 : -ENOMEM;
1842                 } else {
1843                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1844                         return -EINVAL;
1845                 }
1846         } else {
1847                 /* Read password from file of (if NULL) from terminal */
1848                 if (keyfile)
1849                         r = key_from_file(cd, _("Enter any passphrase: "),
1850                                           &password, &passwordLen,
1851                                           keyfile, keyfile_offset, keyfile_size);
1852                 else
1853                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1854                                               &password, &passwordLen, 0);
1855                 if (r < 0)
1856                         goto out;
1857
1858                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen,
1859                                            &cd->u.luks1.hdr, &vk, cd);
1860         }
1861
1862         if(r < 0)
1863                 goto out;
1864
1865         if (new_keyfile)
1866                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1867                                   &new_password, &new_passwordLen, new_keyfile,
1868                                   new_keyfile_offset, new_keyfile_size);
1869         else
1870                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1871                                       &new_password, &new_passwordLen, 1);
1872         if (r < 0)
1873                 goto out;
1874
1875         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1876                          &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
1877 out:
1878         crypt_safe_free(password);
1879         crypt_safe_free(new_password);
1880         crypt_free_volume_key(vk);
1881         return r < 0 ? r : keyslot;
1882 }
1883
1884 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1885         int keyslot,
1886         const char *keyfile,
1887         size_t keyfile_size,
1888         const char *new_keyfile,
1889         size_t new_keyfile_size)
1890 {
1891         return crypt_keyslot_add_by_keyfile_offset(cd, keyslot,
1892                                 keyfile, keyfile_size, 0,
1893                                 new_keyfile, new_keyfile_size, 0);
1894 }
1895
1896 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1897         int keyslot,
1898         const char *volume_key,
1899         size_t volume_key_size,
1900         const char *passphrase,
1901         size_t passphrase_size)
1902 {
1903         struct volume_key *vk = NULL;
1904         int r;
1905         char *new_password = NULL; size_t new_passwordLen;
1906
1907         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1908
1909         r = onlyLUKS(cd);
1910         if (r < 0)
1911                 return r;
1912
1913         if (volume_key)
1914                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1915         else if (cd->volume_key)
1916                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1917
1918         if (!vk)
1919                 return -ENOMEM;
1920
1921         r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
1922         if (r < 0) {
1923                 log_err(cd, _("Volume key does not match the volume.\n"));
1924                 goto out;
1925         }
1926
1927         r = keyslot_verify_or_find_empty(cd, &keyslot);
1928         if (r)
1929                 goto out;
1930
1931         if (!passphrase) {
1932                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1933                                       &new_password, &new_passwordLen, 1);
1934                 if (r < 0)
1935                         goto out;
1936                 passphrase = new_password;
1937                 passphrase_size = new_passwordLen;
1938         }
1939
1940         r = LUKS_set_key(keyslot, passphrase, passphrase_size,
1941                          &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
1942 out:
1943         crypt_safe_free(new_password);
1944         crypt_free_volume_key(vk);
1945         return (r < 0) ? r : keyslot;
1946 }
1947
1948 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1949 {
1950         crypt_keyslot_info ki;
1951         int r;
1952
1953         log_dbg("Destroying keyslot %d.", keyslot);
1954
1955         r = onlyLUKS(cd);
1956         if (r < 0)
1957                 return r;
1958
1959         ki = crypt_keyslot_status(cd, keyslot);
1960         if (ki == CRYPT_SLOT_INVALID) {
1961                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1962                 return -EINVAL;
1963         }
1964
1965         if (ki == CRYPT_SLOT_INACTIVE) {
1966                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1967                 return -EINVAL;
1968         }
1969
1970         return LUKS_del_key(keyslot, &cd->u.luks1.hdr, cd);
1971 }
1972
1973 // activation/deactivation of device mapping
1974 int crypt_activate_by_passphrase(struct crypt_device *cd,
1975         const char *name,
1976         int keyslot,
1977         const char *passphrase,
1978         size_t passphrase_size,
1979         uint32_t flags)
1980 {
1981         crypt_status_info ci;
1982         struct volume_key *vk = NULL;
1983         char *read_passphrase = NULL;
1984         size_t passphraseLen = 0;
1985         int r;
1986
1987         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1988                 name ? "Activating" : "Checking", name ?: "",
1989                 keyslot, passphrase ? "" : "[none] ");
1990
1991         if (name) {
1992                 ci = crypt_status(NULL, name);
1993                 if (ci == CRYPT_INVALID)
1994                         return -EINVAL;
1995                 else if (ci >= CRYPT_ACTIVE) {
1996                         log_err(cd, _("Device %s already exists.\n"), name);
1997                         return -EEXIST;
1998                 }
1999         }
2000
2001         /* plain, use hashed passphrase */
2002         if (isPLAIN(cd->type)) {
2003                 if (!name)
2004                         return -EINVAL;
2005
2006                 if (!passphrase) {
2007                         r = key_from_terminal(cd, NULL, &read_passphrase,
2008                                               &passphraseLen, 0);
2009                         if (r < 0)
2010                                 goto out;
2011                         passphrase = read_passphrase;
2012                         passphrase_size = passphraseLen;
2013                 }
2014
2015                 r = process_key(cd, cd->u.plain.hdr.hash,
2016                                 cd->u.plain.key_size,
2017                                 passphrase, passphrase_size, &vk);
2018                 if (r < 0)
2019                         goto out;
2020
2021                 r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
2022                 keyslot = 0;
2023         } else if (isLUKS(cd->type)) {
2024                 /* provided passphrase, do not retry */
2025                 if (passphrase) {
2026                         r = LUKS_open_key_with_hdr(keyslot, passphrase,
2027                                                    passphrase_size, &cd->u.luks1.hdr, &vk, cd);
2028                 } else
2029                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
2030
2031                 if (r >= 0) {
2032                         keyslot = r;
2033                         if (name)
2034                                 r = LUKS1_activate(cd, name, vk, flags);
2035                 }
2036         } else
2037                 r = -EINVAL;
2038 out:
2039         crypt_safe_free(read_passphrase);
2040         crypt_free_volume_key(vk);
2041
2042         return r < 0  ? r : keyslot;
2043 }
2044
2045 int crypt_activate_by_keyfile_offset(struct crypt_device *cd,
2046         const char *name,
2047         int keyslot,
2048         const char *keyfile,
2049         size_t keyfile_size,
2050         size_t keyfile_offset,
2051         uint32_t flags)
2052 {
2053         crypt_status_info ci;
2054         struct volume_key *vk = NULL;
2055         char *passphrase_read = NULL;
2056         size_t passphrase_size_read;
2057         unsigned int key_count = 0;
2058         int r;
2059
2060         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
2061                 name ?: "", keyslot, keyfile ?: "[none]");
2062
2063         if (name) {
2064                 ci = crypt_status(NULL, name);
2065                 if (ci == CRYPT_INVALID)
2066                         return -EINVAL;
2067                 else if (ci >= CRYPT_ACTIVE) {
2068                         log_err(cd, _("Device %s already exists.\n"), name);
2069                         return -EEXIST;
2070                 }
2071         }
2072
2073         if (!keyfile)
2074                 return -EINVAL;
2075
2076         if (isPLAIN(cd->type)) {
2077                 if (!name)
2078                         return -EINVAL;
2079
2080                 r = key_from_file(cd, _("Enter passphrase: "),
2081                                   &passphrase_read, &passphrase_size_read,
2082                                   keyfile, keyfile_offset, keyfile_size);
2083                 if (r < 0)
2084                         goto out;
2085
2086                 r = process_key(cd, cd->u.plain.hdr.hash,
2087                                 cd->u.plain.key_size,
2088                                 passphrase_read, passphrase_size_read, &vk);
2089                 if (r < 0)
2090                         goto out;
2091
2092                 r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
2093         } else if (isLUKS(cd->type)) {
2094                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
2095                           &passphrase_size_read, keyfile, keyfile_offset, keyfile_size);
2096                 if (r < 0)
2097                         goto out;
2098                 r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
2099                                            passphrase_size_read, &cd->u.luks1.hdr, &vk, cd);
2100                 if (r < 0)
2101                         goto out;
2102                 keyslot = r;
2103
2104                 if (name) {
2105                         r = LUKS1_activate(cd, name, vk, flags);
2106                         if (r < 0)
2107                                 goto out;
2108                 }
2109                 r = keyslot;
2110         } else if (isLOOPAES(cd->type)) {
2111                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
2112                                   keyfile, keyfile_offset, keyfile_size);
2113                 if (r < 0)
2114                         goto out;
2115                 r = LOOPAES_parse_keyfile(cd, &vk, cd->u.loopaes.hdr.hash, &key_count,
2116                                           passphrase_read, passphrase_size_read);
2117                 if (r < 0)
2118                         goto out;
2119                 if (name)
2120                         r = LOOPAES_activate(cd, name, cd->u.loopaes.cipher,
2121                                              key_count, vk, flags);
2122         } else
2123                 r = -EINVAL;
2124
2125 out:
2126         crypt_safe_free(passphrase_read);
2127         crypt_free_volume_key(vk);
2128
2129         return r;
2130 }
2131
2132 int crypt_activate_by_keyfile(struct crypt_device *cd,
2133         const char *name,
2134         int keyslot,
2135         const char *keyfile,
2136         size_t keyfile_size,
2137         uint32_t flags)
2138 {
2139         return crypt_activate_by_keyfile_offset(cd, name, keyslot, keyfile,
2140                                                 keyfile_size, 0, flags);
2141 }
2142
2143 int crypt_activate_by_volume_key(struct crypt_device *cd,
2144         const char *name,
2145         const char *volume_key,
2146         size_t volume_key_size,
2147         uint32_t flags)
2148 {
2149         crypt_status_info ci;
2150         struct volume_key *vk = NULL;
2151         int r = -EINVAL;
2152
2153         log_dbg("Activating volume %s by volume key.", name ?: "[none]");
2154
2155         if (name) {
2156                 ci = crypt_status(NULL, name);
2157                 if (ci == CRYPT_INVALID)
2158                         return -EINVAL;
2159                 else if (ci >= CRYPT_ACTIVE) {
2160                         log_err(cd, _("Device %s already exists.\n"), name);
2161                         return -EEXIST;
2162                 }
2163         }
2164
2165         /* use key directly, no hash */
2166         if (isPLAIN(cd->type)) {
2167                 if (!name)
2168                         return -EINVAL;
2169
2170                 if (!volume_key || !volume_key_size || volume_key_size != cd->u.plain.key_size) {
2171                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
2172                         return -EINVAL;
2173                 }
2174
2175                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2176                 if (!vk)
2177                         return -ENOMEM;
2178
2179                 r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
2180         } else if (isLUKS(cd->type)) {
2181                 /* If key is not provided, try to use internal key */
2182                 if (!volume_key) {
2183                         if (!cd->volume_key) {
2184                                 log_err(cd, _("Volume key does not match the volume.\n"));
2185                                 return -EINVAL;
2186                         }
2187                         volume_key_size = cd->volume_key->keylength;
2188                         volume_key = cd->volume_key->key;
2189                 }
2190
2191                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2192                 if (!vk)
2193                         return -ENOMEM;
2194                 r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
2195
2196                 if (r == -EPERM)
2197                         log_err(cd, _("Volume key does not match the volume.\n"));
2198
2199                 if (!r && name)
2200                         r = LUKS1_activate(cd, name, vk, flags);
2201         } else if (isVERITY(cd->type)) {
2202                 /* volume_key == root hash */
2203                 if (!volume_key || !volume_key_size) {
2204                         log_err(cd, _("Incorrect root hash specified for verity device.\n"));
2205                         return -EINVAL;
2206                 }
2207
2208                 r = VERITY_activate(cd, name, volume_key, volume_key_size,
2209                                     &cd->u.verity.hdr, CRYPT_ACTIVATE_READONLY);
2210
2211                 if (r == -EPERM) {
2212                         free(cd->u.verity.root_hash);
2213                         cd->u.verity.root_hash = NULL;
2214                 } if (!r) {
2215                         cd->u.verity.root_hash_size = volume_key_size;
2216                         if (!cd->u.verity.root_hash)
2217                                 cd->u.verity.root_hash = malloc(volume_key_size);
2218                         if (cd->u.verity.root_hash)
2219                                 memcpy(cd->u.verity.root_hash, volume_key, volume_key_size);
2220                 }
2221         } else if (isTCRYPT(cd->type)) {
2222                 if (!name)
2223                         return 0;
2224                 r = TCRYPT_activate(cd, name, &cd->u.tcrypt.hdr,
2225                                     &cd->u.tcrypt.params, flags);
2226         } else
2227                 log_err(cd, _("Device type is not properly initialised.\n"));
2228
2229         crypt_free_volume_key(vk);
2230
2231         return r;
2232 }
2233
2234 int crypt_deactivate(struct crypt_device *cd, const char *name)
2235 {
2236         struct crypt_device *fake_cd = NULL;
2237         int r;
2238
2239         if (!name)
2240                 return -EINVAL;
2241
2242         log_dbg("Deactivating volume %s.", name);
2243
2244         if (!cd) {
2245                 r = crypt_init_by_name(&fake_cd, name);
2246                 if (r < 0)
2247                         return r;
2248                 cd = fake_cd;
2249         }
2250
2251         switch (crypt_status(cd, name)) {
2252                 case CRYPT_ACTIVE:
2253                 case CRYPT_BUSY:
2254                         if (isTCRYPT(cd->type))
2255                                 r = TCRYPT_deactivate(cd, name);
2256                         else
2257                                 r = dm_remove_device(cd, name, 0, 0);
2258                         if (r < 0 && crypt_status(cd, name) == CRYPT_BUSY) {
2259                                 log_err(cd, _("Device %s is still in use.\n"), name);
2260                                 r = -EBUSY;
2261                         }
2262                         break;
2263                 case CRYPT_INACTIVE:
2264                         log_err(cd, _("Device %s is not active.\n"), name);
2265                         r = -ENODEV;
2266                         break;
2267                 default:
2268                         log_err(cd, _("Invalid device %s.\n"), name);
2269                         r = -EINVAL;
2270         }
2271
2272         crypt_free(fake_cd);
2273
2274         return r;
2275 }
2276
2277 int crypt_volume_key_get(struct crypt_device *cd,
2278         int keyslot,
2279         char *volume_key,
2280         size_t *volume_key_size,
2281         const char *passphrase,
2282         size_t passphrase_size)
2283 {
2284         struct volume_key *vk = NULL;
2285         unsigned key_len;
2286         int r = -EINVAL;
2287
2288         if (crypt_fips_mode()) {
2289                 log_err(cd, _("Function not available in FIPS mode.\n"));
2290                 return -EACCES;
2291         }
2292
2293         key_len = crypt_get_volume_key_size(cd);
2294         if (key_len > *volume_key_size) {
2295                 log_err(cd, _("Volume key buffer too small.\n"));
2296                 return -ENOMEM;
2297         }
2298
2299         if (isPLAIN(cd->type) && cd->u.plain.hdr.hash) {
2300                 r = process_key(cd, cd->u.plain.hdr.hash, key_len,
2301                                 passphrase, passphrase_size, &vk);
2302                 if (r < 0)
2303                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2304         } else if (isLUKS(cd->type)) {
2305                 r = LUKS_open_key_with_hdr(keyslot, passphrase,
2306                                         passphrase_size, &cd->u.luks1.hdr, &vk, cd);
2307         } else if (isTCRYPT(cd->type)) {
2308                 r = TCRYPT_get_volume_key(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params, &vk);
2309         } else
2310                 log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2311
2312         if (r >= 0) {
2313                 memcpy(volume_key, vk->key, vk->keylength);
2314                 *volume_key_size = vk->keylength;
2315         }
2316
2317         crypt_free_volume_key(vk);
2318         return r;
2319 }
2320
2321 int crypt_volume_key_verify(struct crypt_device *cd,
2322         const char *volume_key,
2323         size_t volume_key_size)
2324 {
2325         struct volume_key *vk;
2326         int r;
2327
2328         r = onlyLUKS(cd);
2329         if (r < 0)
2330                 return r;
2331
2332         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2333         if (!vk)
2334                 return -ENOMEM;
2335
2336         r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
2337
2338         if (r == -EPERM)
2339                 log_err(cd, _("Volume key does not match the volume.\n"));
2340
2341         crypt_free_volume_key(vk);
2342
2343         return r;
2344 }
2345
2346 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2347 {
2348         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2349         cd->timeout = timeout_sec;
2350 }
2351
2352 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2353 {
2354         log_dbg("Password retry count set to %d.", tries);
2355         cd->tries = tries;
2356 }
2357
2358 void crypt_set_iteration_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2359 {
2360         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2361         cd->iteration_time = iteration_time_ms;
2362 }
2363 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2364 {
2365         crypt_set_iteration_time(cd, iteration_time_ms);
2366 }
2367
2368 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2369 {
2370         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2371         cd->password_verify = password_verify ? 1 : 0;
2372 }
2373
2374 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2375 {
2376         switch (rng_type) {
2377         case CRYPT_RNG_URANDOM:
2378         case CRYPT_RNG_RANDOM:
2379                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2380                 cd->rng_type = rng_type;
2381         }
2382 }
2383
2384 int crypt_get_rng_type(struct crypt_device *cd)
2385 {
2386         if (!cd)
2387                 return -EINVAL;
2388
2389         return cd->rng_type;
2390 }
2391
2392 int crypt_memory_lock(struct crypt_device *cd, int lock)
2393 {
2394         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2395 }
2396
2397 // reporting
2398 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2399 {
2400         int r;
2401
2402         if (!cd)
2403                 dm_backend_init();
2404
2405         r = dm_status_device(cd, name);
2406
2407         if (!cd)
2408                 dm_backend_exit();
2409
2410         if (r < 0 && r != -ENODEV)
2411                 return CRYPT_INVALID;
2412
2413         if (r == 0)
2414                 return CRYPT_ACTIVE;
2415
2416         if (r > 0)
2417                 return CRYPT_BUSY;
2418
2419         return CRYPT_INACTIVE;
2420 }
2421
2422 static void hexprint(struct crypt_device *cd, const char *d, int n, const char *sep)
2423 {
2424         int i;
2425         for(i = 0; i < n; i++)
2426                 log_std(cd, "%02hhx%s", (const char)d[i], sep);
2427 }
2428
2429 static int _luks_dump(struct crypt_device *cd)
2430 {
2431         int i;
2432
2433         log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(cd));
2434         log_std(cd, "Version:       \t%" PRIu16 "\n", cd->u.luks1.hdr.version);
2435         log_std(cd, "Cipher name:   \t%s\n", cd->u.luks1.hdr.cipherName);
2436         log_std(cd, "Cipher mode:   \t%s\n", cd->u.luks1.hdr.cipherMode);
2437         log_std(cd, "Hash spec:     \t%s\n", cd->u.luks1.hdr.hashSpec);
2438         log_std(cd, "Payload offset:\t%" PRIu32 "\n", cd->u.luks1.hdr.payloadOffset);
2439         log_std(cd, "MK bits:       \t%" PRIu32 "\n", cd->u.luks1.hdr.keyBytes * 8);
2440         log_std(cd, "MK digest:     \t");
2441         hexprint(cd, cd->u.luks1.hdr.mkDigest, LUKS_DIGESTSIZE, " ");
2442         log_std(cd, "\n");
2443         log_std(cd, "MK salt:       \t");
2444         hexprint(cd, cd->u.luks1.hdr.mkDigestSalt, LUKS_SALTSIZE/2, " ");
2445         log_std(cd, "\n               \t");
2446         hexprint(cd, cd->u.luks1.hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2447         log_std(cd, "\n");
2448         log_std(cd, "MK iterations: \t%" PRIu32 "\n", cd->u.luks1.hdr.mkDigestIterations);
2449         log_std(cd, "UUID:          \t%s\n\n", cd->u.luks1.hdr.uuid);
2450         for(i = 0; i < LUKS_NUMKEYS; i++) {
2451                 if(cd->u.luks1.hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2452                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2453                         log_std(cd, "\tIterations:         \t%" PRIu32 "\n",
2454                                 cd->u.luks1.hdr.keyblock[i].passwordIterations);
2455                         log_std(cd, "\tSalt:               \t");
2456                         hexprint(cd, cd->u.luks1.hdr.keyblock[i].passwordSalt,
2457                                  LUKS_SALTSIZE/2, " ");
2458                         log_std(cd, "\n\t                      \t");
2459                         hexprint(cd, cd->u.luks1.hdr.keyblock[i].passwordSalt +
2460                                  LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2461                         log_std(cd, "\n");
2462
2463                         log_std(cd, "\tKey material offset:\t%" PRIu32 "\n",
2464                                 cd->u.luks1.hdr.keyblock[i].keyMaterialOffset);
2465                         log_std(cd, "\tAF stripes:            \t%" PRIu32 "\n",
2466                                 cd->u.luks1.hdr.keyblock[i].stripes);
2467                 }
2468                 else
2469                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2470         }
2471         return 0;
2472 }
2473
2474 static int _verity_dump(struct crypt_device *cd)
2475 {
2476         log_std(cd, "VERITY header information for %s\n", mdata_device_path(cd));
2477         log_std(cd, "UUID:            \t%s\n", cd->u.verity.uuid ?: "");
2478         log_std(cd, "Hash type:       \t%u\n", cd->u.verity.hdr.hash_type);
2479         log_std(cd, "Data blocks:     \t%" PRIu64 "\n", cd->u.verity.hdr.data_size);
2480         log_std(cd, "Data block size: \t%u\n", cd->u.verity.hdr.data_block_size);
2481         log_std(cd, "Hash block size: \t%u\n", cd->u.verity.hdr.hash_block_size);
2482         log_std(cd, "Hash algorithm:  \t%s\n", cd->u.verity.hdr.hash_name);
2483         log_std(cd, "Salt:            \t");
2484         if (cd->u.verity.hdr.salt_size)
2485                 hexprint(cd, cd->u.verity.hdr.salt, cd->u.verity.hdr.salt_size, "");
2486         else
2487                 log_std(cd, "-");
2488         log_std(cd, "\n");
2489         if (cd->u.verity.root_hash) {
2490                 log_std(cd, "Root hash:      \t");
2491                 hexprint(cd, cd->u.verity.root_hash, cd->u.verity.root_hash_size, "");
2492                 log_std(cd, "\n");
2493         }
2494         return 0;
2495 }
2496
2497 int crypt_dump(struct crypt_device *cd)
2498 {
2499         if (isLUKS(cd->type))
2500                 return _luks_dump(cd);
2501         else if (isVERITY(cd->type))
2502                 return _verity_dump(cd);
2503         else if (isTCRYPT(cd->type))
2504                 return TCRYPT_dump(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
2505
2506         log_err(cd, _("Dump operation is not supported for this device type.\n"));
2507         return -EINVAL;
2508 }
2509
2510
2511 static int _init_by_name_crypt_none(struct crypt_device *cd)
2512 {
2513         struct crypt_dm_active_device dmd = {};
2514         int r;
2515
2516         if (cd->type || !cd->u.none.active_name)
2517                 return -EINVAL;
2518
2519         r = dm_query_device(cd, cd->u.none.active_name,
2520                         DM_ACTIVE_CRYPT_CIPHER |
2521                         DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
2522         if (r >= 0)
2523                 r = crypt_parse_name_and_mode(dmd.u.crypt.cipher,
2524                                               cd->u.none.cipher, NULL,
2525                                               cd->u.none.cipher_mode);
2526
2527         if (!r)
2528                 cd->u.none.key_size = dmd.u.crypt.vk->keylength;
2529
2530         crypt_free_volume_key(dmd.u.crypt.vk);
2531         free(CONST_CAST(void*)dmd.u.crypt.cipher);
2532         return r;
2533 }
2534
2535 const char *crypt_get_cipher(struct crypt_device *cd)
2536 {
2537         if (isPLAIN(cd->type))
2538                 return cd->u.plain.cipher;
2539
2540         if (isLUKS(cd->type))
2541                 return cd->u.luks1.hdr.cipherName;
2542
2543         if (isLOOPAES(cd->type))
2544                 return cd->u.loopaes.cipher;
2545
2546         if (isTCRYPT(cd->type))
2547                 return cd->u.tcrypt.params.cipher;
2548
2549         if (!cd->type && !_init_by_name_crypt_none(cd))
2550                 return cd->u.none.cipher;
2551
2552         return NULL;
2553 }
2554
2555 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2556 {
2557         if (isPLAIN(cd->type))
2558                 return cd->u.plain.cipher_mode;
2559
2560         if (isLUKS(cd->type))
2561                 return cd->u.luks1.hdr.cipherMode;
2562
2563         if (isLOOPAES(cd->type))
2564                 return cd->u.loopaes.cipher_mode;
2565
2566         if (isTCRYPT(cd->type))
2567                 return cd->u.tcrypt.params.mode;
2568
2569         if (!cd->type && !_init_by_name_crypt_none(cd))
2570                 return cd->u.none.cipher_mode;
2571
2572         return NULL;
2573 }
2574
2575 const char *crypt_get_uuid(struct crypt_device *cd)
2576 {
2577         if (isLUKS(cd->type))
2578                 return cd->u.luks1.hdr.uuid;
2579
2580         if (isVERITY(cd->type))
2581                 return cd->u.verity.uuid;
2582
2583         return NULL;
2584 }
2585
2586 const char *crypt_get_device_name(struct crypt_device *cd)
2587 {
2588         const char *path = device_block_path(cd->device);
2589
2590         if (!path)
2591                 path = device_path(cd->device);
2592
2593         return path;
2594 }
2595
2596 int crypt_get_volume_key_size(struct crypt_device *cd)
2597 {
2598         if (isPLAIN(cd->type))
2599                 return cd->u.plain.key_size;
2600
2601         if (isLUKS(cd->type))
2602                 return cd->u.luks1.hdr.keyBytes;
2603
2604         if (isLOOPAES(cd->type))
2605                 return cd->u.loopaes.key_size;
2606
2607         if (isVERITY(cd->type))
2608                 return cd->u.verity.root_hash_size;
2609
2610         if (isTCRYPT(cd->type))
2611                 return cd->u.tcrypt.params.key_size;
2612
2613         if (!cd->type && !_init_by_name_crypt_none(cd))
2614                 return cd->u.none.key_size;
2615
2616         return 0;
2617 }
2618
2619 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2620 {
2621         if (isPLAIN(cd->type))
2622                 return cd->u.plain.hdr.offset;
2623
2624         if (isLUKS(cd->type))
2625                 return cd->u.luks1.hdr.payloadOffset;
2626
2627         if (isLOOPAES(cd->type))
2628                 return cd->u.loopaes.hdr.offset;
2629
2630         if (isTCRYPT(cd->type))
2631                 return TCRYPT_get_data_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
2632
2633         return 0;
2634 }
2635
2636 uint64_t crypt_get_iv_offset(struct crypt_device *cd)
2637 {
2638         if (isPLAIN(cd->type))
2639                 return cd->u.plain.hdr.skip;
2640
2641         if (isLUKS(cd->type))
2642                 return 0;
2643
2644         if (isLOOPAES(cd->type))
2645                 return cd->u.loopaes.hdr.skip;
2646
2647         if (isTCRYPT(cd->type))
2648                 return TCRYPT_get_iv_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
2649
2650         return 0;
2651 }
2652
2653 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2654 {
2655         if (onlyLUKS(cd) < 0)
2656                 return CRYPT_SLOT_INVALID;
2657
2658         return LUKS_keyslot_info(&cd->u.luks1.hdr, keyslot);
2659 }
2660
2661 int crypt_keyslot_max(const char *type)
2662 {
2663         if (type && isLUKS(type))
2664                 return LUKS_NUMKEYS;
2665
2666         return -EINVAL;
2667 }
2668
2669 int crypt_keyslot_area(struct crypt_device *cd,
2670         int keyslot,
2671         uint64_t *offset,
2672         uint64_t *length)
2673 {
2674         if (!isLUKS(cd->type))
2675                 return -EINVAL;
2676
2677         return LUKS_keyslot_area(&cd->u.luks1.hdr, keyslot, offset, length);
2678 }
2679
2680 const char *crypt_get_type(struct crypt_device *cd)
2681 {
2682         return cd->type;
2683 }
2684
2685 int crypt_get_verity_info(struct crypt_device *cd,
2686         struct crypt_params_verity *vp)
2687 {
2688         if (!isVERITY(cd->type) || !vp)
2689                 return -EINVAL;
2690
2691         vp->data_device = device_path(cd->device);
2692         vp->hash_device = mdata_device_path(cd);
2693         vp->hash_name = cd->u.verity.hdr.hash_name;
2694         vp->salt = cd->u.verity.hdr.salt;
2695         vp->salt_size = cd->u.verity.hdr.salt_size;
2696         vp->data_block_size = cd->u.verity.hdr.data_block_size;
2697         vp->hash_block_size = cd->u.verity.hdr.hash_block_size;
2698         vp->data_size = cd->u.verity.hdr.data_size;
2699         vp->hash_area_offset = cd->u.verity.hdr.hash_area_offset;
2700         vp->hash_type = cd->u.verity.hdr.hash_type;
2701         vp->flags = cd->u.verity.hdr.flags & CRYPT_VERITY_NO_HEADER;
2702         return 0;
2703 }
2704
2705 int crypt_get_active_device(struct crypt_device *cd, const char *name,
2706                             struct crypt_active_device *cad)
2707 {
2708         struct crypt_dm_active_device dmd;
2709         int r;
2710
2711         r = dm_query_device(cd, name, 0, &dmd);
2712         if (r < 0)
2713                 return r;
2714
2715         if (dmd.target != DM_CRYPT && dmd.target != DM_VERITY)
2716                 return -ENOTSUP;
2717
2718         if (cd && isTCRYPT(cd->type)) {
2719                 cad->offset     = TCRYPT_get_data_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
2720                 cad->iv_offset  = TCRYPT_get_iv_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
2721         } else {
2722                 cad->offset     = dmd.u.crypt.offset;
2723                 cad->iv_offset  = dmd.u.crypt.iv_offset;
2724         }
2725         cad->size       = dmd.size;
2726         cad->flags      = dmd.flags;
2727
2728         return 0;
2729 }