lib/setup.c

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