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->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         cd->verity_hdr.hash_name = strdup(params->hash_name);
1072         cd->verity_hdr.data_device = NULL;
1073         cd->verity_hdr.data_block_size = params->data_block_size;
1074         cd->verity_hdr.hash_block_size = params->hash_block_size;
1075         cd->verity_hdr.hash_area_offset = params->hash_area_offset;
1076         cd->verity_hdr.hash_type = params->hash_type;
1077         cd->verity_hdr.flags = params->flags;
1078         cd->verity_hdr.salt_size = params->salt_size;
1079         cd->verity_hdr.salt = malloc(params->salt_size);
1080         if (params->salt)
1081                 memcpy(CONST_CAST(char*)cd->verity_hdr.salt, params->salt,
1082                        params->salt_size);
1083         else
1084                 r = crypt_random_get(cd, CONST_CAST(char*)cd->verity_hdr.salt,
1085                                      params->salt_size, CRYPT_RND_SALT);
1086         if (r)
1087                 return r;
1088
1089         if (params->flags & CRYPT_VERITY_CREATE_HASH) {
1090                 r = VERITY_create(cd, &cd->verity_hdr,
1091                                   cd->verity_root_hash, cd->verity_root_hash_size);
1092                 if (r)
1093                         return r;
1094         }
1095
1096         if (!(params->flags & CRYPT_VERITY_NO_HEADER)) {
1097                 if (uuid)
1098                         cd->verity_uuid = strdup(uuid);
1099                 else {
1100                         r = VERITY_UUID_generate(cd, &cd->verity_uuid);
1101                         if (r)
1102                                 return r;
1103                 }
1104
1105                 r = VERITY_write_sb(cd, cd->verity_hdr.hash_area_offset,
1106                                     cd->verity_uuid,
1107                                     &cd->verity_hdr);
1108         }
1109         return r;
1110 }
1111
1112 int crypt_format(struct crypt_device *cd,
1113         const char *type,
1114         const char *cipher,
1115         const char *cipher_mode,
1116         const char *uuid,
1117         const char *volume_key,
1118         size_t volume_key_size,
1119         void *params)
1120 {
1121         int r;
1122
1123         if (!type)
1124                 return -EINVAL;
1125
1126         if (cd->type) {
1127                 log_dbg("Context already formatted as %s.", cd->type);
1128                 return -EINVAL;
1129         }
1130
1131         log_dbg("Formatting device %s as type %s.", mdata_device_path(cd) ?: "(none)", type);
1132
1133         r = init_crypto(cd);
1134         if (r < 0)
1135                 return r;
1136
1137         if (isPLAIN(type))
1138                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1139                                         uuid, volume_key_size, params);
1140         else if (isLUKS(type))
1141                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1142                                         uuid, volume_key, volume_key_size, params);
1143         else if (isLOOPAES(type))
1144                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1145         else if (isVERITY(type))
1146                 r = _crypt_format_verity(cd, uuid, params);
1147         else {
1148                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1149                 r = -EINVAL;
1150         }
1151
1152         if (r < 0) {
1153                 free(cd->type);
1154                 cd->type = NULL;
1155                 crypt_free_volume_key(cd->volume_key);
1156                 cd->volume_key = NULL;
1157         }
1158
1159         return r;
1160 }
1161
1162 int crypt_load(struct crypt_device *cd,
1163                const char *requested_type,
1164                void *params)
1165 {
1166         int r;
1167
1168         log_dbg("Trying to load %s crypt type from device %s.",
1169                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1170
1171         if (!crypt_metadata_device(cd))
1172                 return -EINVAL;
1173
1174         if (!requested_type || isLUKS(requested_type)) {
1175                 if (cd->type && !isLUKS(cd->type)) {
1176                         log_dbg("Context is already initialised to type %s", cd->type);
1177                         return -EINVAL;
1178                 }
1179
1180                 r = _crypt_load_luks1(cd, 1, 0);
1181         } else if (isVERITY(requested_type)) {
1182                 if (cd->type && !isVERITY(cd->type)) {
1183                         log_dbg("Context is already initialised to type %s", cd->type);
1184                         return -EINVAL;
1185                 }
1186                 r = _crypt_load_verity(cd, params);
1187         } else
1188                 return -EINVAL;
1189
1190         return r;
1191 }
1192
1193 int crypt_repair(struct crypt_device *cd,
1194                  const char *requested_type,
1195                  void *params __attribute__((unused)))
1196 {
1197         int r;
1198
1199         log_dbg("Trying to repair %s crypt type from device %s.",
1200                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1201
1202         if (!crypt_metadata_device(cd))
1203                 return -EINVAL;
1204
1205         if (requested_type && !isLUKS(requested_type))
1206                 return -EINVAL;
1207
1208
1209         /* Load with repair */
1210         r = _crypt_load_luks1(cd, 1, 1);
1211         if (r < 0)
1212                 return r;
1213
1214         /* cd->type and header must be set in context */
1215         r = crypt_check_data_device_size(cd);
1216         if (r < 0) {
1217                 free(cd->type);
1218                 cd->type = NULL;
1219         }
1220
1221         return r;
1222 }
1223
1224 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1225 {
1226         struct crypt_dm_active_device dmd;
1227         int r;
1228
1229         /* Device context type must be initialised */
1230         if (!cd->type || !crypt_get_uuid(cd))
1231                 return -EINVAL;
1232
1233         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1234
1235         r = dm_query_device(cd, name, DM_ACTIVE_DEVICE | DM_ACTIVE_CRYPT_CIPHER |
1236                                   DM_ACTIVE_UUID | DM_ACTIVE_CRYPT_KEYSIZE |
1237                                   DM_ACTIVE_CRYPT_KEY, &dmd);
1238         if (r < 0) {
1239                 log_err(NULL, _("Device %s is not active.\n"), name);
1240                 return -EINVAL;
1241         }
1242
1243         if (!dmd.uuid || dmd.target != DM_CRYPT) {
1244                 r = -EINVAL;
1245                 goto out;
1246         }
1247
1248         r = device_block_adjust(cd, dmd.data_device, DEV_OK,
1249                                 dmd.u.crypt.offset, &new_size, &dmd.flags);
1250         if (r)
1251                 goto out;
1252
1253         if (new_size == dmd.size) {
1254                 log_dbg("Device has already requested size %" PRIu64
1255                         " sectors.", dmd.size);
1256                 r = 0;
1257         } else {
1258                 dmd.size = new_size;
1259                 r = dm_create_device(cd, name, cd->type, &dmd, 1);
1260         }
1261 out:
1262         if (dmd.target == DM_CRYPT) {
1263                 crypt_free_volume_key(dmd.u.crypt.vk);
1264                 free(CONST_CAST(void*)dmd.u.crypt.cipher);
1265         }
1266         free(CONST_CAST(void*)dmd.data_device);
1267         free(CONST_CAST(void*)dmd.uuid);
1268
1269         return r;
1270 }
1271
1272 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1273 {
1274         if (!isLUKS(cd->type)) {
1275                 log_err(cd, _("This operation is not supported for this device type.\n"));
1276                 return  -EINVAL;
1277         }
1278
1279         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1280                 log_dbg("UUID is the same as requested (%s) for device %s.",
1281                         uuid, mdata_device_path(cd));
1282                 return 0;
1283         }
1284
1285         if (uuid)
1286                 log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device_path(cd));
1287         else
1288                 log_dbg("Requested new UUID refresh for %s.", mdata_device_path(cd));
1289
1290         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1291                 return -EPERM;
1292
1293         return LUKS_hdr_uuid_set(&cd->hdr, uuid, cd);
1294 }
1295
1296 int crypt_header_backup(struct crypt_device *cd,
1297                         const char *requested_type,
1298                         const char *backup_file)
1299 {
1300         int r;
1301
1302         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1303                 return -EINVAL;
1304
1305         r = init_crypto(cd);
1306         if (r < 0)
1307                 return r;
1308
1309         log_dbg("Requested header backup of device %s (%s) to "
1310                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1311
1312         return LUKS_hdr_backup(backup_file, &cd->hdr, cd);
1313 }
1314
1315 int crypt_header_restore(struct crypt_device *cd,
1316                          const char *requested_type,
1317                          const char *backup_file)
1318 {
1319         int r;
1320
1321         if (requested_type && !isLUKS(requested_type))
1322                 return -EINVAL;
1323
1324         r = init_crypto(cd);
1325         if (r < 0)
1326                 return r;
1327
1328         log_dbg("Requested header restore to device %s (%s) from "
1329                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1330
1331         return LUKS_hdr_restore(backup_file, &cd->hdr, cd);
1332 }
1333
1334 void crypt_free(struct crypt_device *cd)
1335 {
1336         if (cd) {
1337                 log_dbg("Releasing crypt device %s context.", mdata_device_path(cd));
1338
1339                 dm_backend_exit();
1340                 crypt_free_volume_key(cd->volume_key);
1341
1342                 device_free(cd->device);
1343                 device_free(cd->metadata_device);
1344                 free(cd->type);
1345
1346                 /* used in plain device only */
1347                 free(CONST_CAST(void*)cd->plain_hdr.hash);
1348                 free(cd->plain_cipher);
1349                 free(cd->plain_cipher_mode);
1350                 free(cd->plain_uuid);
1351
1352                 /* used in loop-AES device only */
1353                 free(CONST_CAST(void*)cd->loopaes_hdr.hash);
1354                 free(cd->loopaes_cipher);
1355                 free(cd->loopaes_uuid);
1356
1357                 /* used in verity device only */
1358                 free(CONST_CAST(void*)cd->verity_hdr.hash_name);
1359                 free(CONST_CAST(void*)cd->verity_hdr.salt);
1360                 free(cd->verity_root_hash);
1361                 free(cd->verity_uuid);
1362
1363                 free(cd);
1364         }
1365 }
1366
1367 int crypt_suspend(struct crypt_device *cd,
1368                   const char *name)
1369 {
1370         crypt_status_info ci;
1371         int r;
1372
1373         log_dbg("Suspending volume %s.", name);
1374
1375         if (!isLUKS(cd->type)) {
1376                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1377                 r = -EINVAL;
1378                 goto out;
1379         }
1380
1381         ci = crypt_status(NULL, name);
1382         if (ci < CRYPT_ACTIVE) {
1383                 log_err(cd, _("Volume %s is not active.\n"), name);
1384                 return -EINVAL;
1385         }
1386
1387         if (!cd)
1388                 dm_backend_init();
1389
1390         r = dm_status_suspended(cd, name);
1391         if (r < 0)
1392                 goto out;
1393
1394         if (r) {
1395                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1396                 r = -EINVAL;
1397                 goto out;
1398         }
1399
1400         r = dm_suspend_and_wipe_key(cd, name);
1401         if (r == -ENOTSUP)
1402                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1403         else if (r)
1404                 log_err(cd, "Error during suspending device %s.\n", name);
1405 out:
1406         if (!cd)
1407                 dm_backend_exit();
1408         return r;
1409 }
1410
1411 int crypt_resume_by_passphrase(struct crypt_device *cd,
1412                                const char *name,
1413                                int keyslot,
1414                                const char *passphrase,
1415                                size_t passphrase_size)
1416 {
1417         struct volume_key *vk = NULL;
1418         int r;
1419
1420         log_dbg("Resuming volume %s.", name);
1421
1422         if (!isLUKS(cd->type)) {
1423                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1424                 r = -EINVAL;
1425                 goto out;
1426         }
1427
1428         r = dm_status_suspended(cd, name);
1429         if (r < 0)
1430                 return r;
1431
1432         if (!r) {
1433                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1434                 return -EINVAL;
1435         }
1436
1437         if (passphrase) {
1438                 r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size,
1439                                            &cd->hdr, &vk, cd);
1440         } else
1441                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1442
1443         if (r >= 0) {
1444                 keyslot = r;
1445                 r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
1446                 if (r == -ENOTSUP)
1447                         log_err(cd, "Resume is not supported for device %s.\n", name);
1448                 else if (r)
1449                         log_err(cd, "Error during resuming device %s.\n", name);
1450         } else
1451                 r = keyslot;
1452 out:
1453         crypt_free_volume_key(vk);
1454         return r < 0 ? r : keyslot;
1455 }
1456
1457 int crypt_resume_by_keyfile_offset(struct crypt_device *cd,
1458                                    const char *name,
1459                                    int keyslot,
1460                                    const char *keyfile,
1461                                    size_t keyfile_size,
1462                                    size_t keyfile_offset)
1463 {
1464         struct volume_key *vk = NULL;
1465         char *passphrase_read = NULL;
1466         size_t passphrase_size_read;
1467         int r;
1468
1469         log_dbg("Resuming volume %s.", name);
1470
1471         if (!isLUKS(cd->type)) {
1472                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1473                 r = -EINVAL;
1474                 goto out;
1475         }
1476
1477         r = dm_status_suspended(cd, name);
1478         if (r < 0)
1479                 return r;
1480
1481         if (!r) {
1482                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1483                 return -EINVAL;
1484         }
1485
1486         if (!keyfile)
1487                 return -EINVAL;
1488
1489         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1490                           &passphrase_size_read, keyfile, keyfile_offset,
1491                           keyfile_size);
1492         if (r < 0)
1493                 goto out;
1494
1495         r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
1496                                    passphrase_size_read, &cd->hdr, &vk, cd);
1497         if (r < 0)
1498                 goto out;
1499
1500         keyslot = r;
1501         r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
1502         if (r)
1503                 log_err(cd, "Error during resuming device %s.\n", name);
1504 out:
1505         crypt_safe_free(passphrase_read);
1506         crypt_free_volume_key(vk);
1507         return r < 0 ? r : keyslot;
1508 }
1509
1510 int crypt_resume_by_keyfile(struct crypt_device *cd,
1511                             const char *name,
1512                             int keyslot,
1513                             const char *keyfile,
1514                             size_t keyfile_size)
1515 {
1516         return crypt_resume_by_keyfile_offset(cd, name, keyslot,
1517                                               keyfile, keyfile_size, 0);
1518 }
1519
1520 // slot manipulation
1521 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1522         int keyslot, // -1 any
1523         const char *passphrase, // NULL -> terminal
1524         size_t passphrase_size,
1525         const char *new_passphrase, // NULL -> terminal
1526         size_t new_passphrase_size)
1527 {
1528         struct volume_key *vk = NULL;
1529         char *password = NULL, *new_password = NULL;
1530         size_t passwordLen, new_passwordLen;
1531         int r;
1532
1533         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1534                 "new passphrase %sprovided.",
1535                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1536
1537         if (!isLUKS(cd->type)) {
1538                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1539                 return -EINVAL;
1540         }
1541
1542         r = keyslot_verify_or_find_empty(cd, &keyslot);
1543         if (r)
1544                 return r;
1545
1546         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1547                 /* No slots used, try to use pre-generated key in header */
1548                 if (cd->volume_key) {
1549                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1550                         r = vk ? 0 : -ENOMEM;
1551                 } else {
1552                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1553                         return -EINVAL;
1554                 }
1555         } else if (passphrase) {
1556                 /* Passphrase provided, use it to unlock existing keyslot */
1557                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase,
1558                                            passphrase_size, &cd->hdr, &vk, cd);
1559         } else {
1560                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1561                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1562                                       &password, &passwordLen, 0);
1563                 if (r < 0)
1564                         goto out;
1565
1566                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password,
1567                                            passwordLen, &cd->hdr, &vk, cd);
1568                 crypt_safe_free(password);
1569         }
1570
1571         if(r < 0)
1572                 goto out;
1573
1574         if (new_passphrase) {
1575                 new_password = CONST_CAST(char*)new_passphrase;
1576                 new_passwordLen = new_passphrase_size;
1577         } else {
1578                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1579                                       &new_password, &new_passwordLen, 1);
1580                 if(r < 0)
1581                         goto out;
1582         }
1583
1584         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1585                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1586         if(r < 0) goto out;
1587
1588         r = 0;
1589 out:
1590         if (!new_passphrase)
1591                 crypt_safe_free(new_password);
1592         crypt_free_volume_key(vk);
1593         return r ?: keyslot;
1594 }
1595
1596 int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
1597         int keyslot,
1598         const char *keyfile,
1599         size_t keyfile_size,
1600         size_t keyfile_offset,
1601         const char *new_keyfile,
1602         size_t new_keyfile_size,
1603         size_t new_keyfile_offset)
1604 {
1605         struct volume_key *vk = NULL;
1606         char *password = NULL; size_t passwordLen;
1607         char *new_password = NULL; size_t new_passwordLen;
1608         int r;
1609
1610         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1611                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1612
1613         if (!isLUKS(cd->type)) {
1614                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1615                 return -EINVAL;
1616         }
1617
1618         r = keyslot_verify_or_find_empty(cd, &keyslot);
1619         if (r)
1620                 return r;
1621
1622         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1623                 /* No slots used, try to use pre-generated key in header */
1624                 if (cd->volume_key) {
1625                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1626                         r = vk ? 0 : -ENOMEM;
1627                 } else {
1628                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1629                         return -EINVAL;
1630                 }
1631         } else {
1632                 /* Read password from file of (if NULL) from terminal */
1633                 if (keyfile)
1634                         r = key_from_file(cd, _("Enter any passphrase: "),
1635                                           &password, &passwordLen,
1636                                           keyfile, keyfile_offset, keyfile_size);
1637                 else
1638                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1639                                               &password, &passwordLen, 0);
1640                 if (r < 0)
1641                         goto out;
1642
1643                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen,
1644                                            &cd->hdr, &vk, cd);
1645         }
1646
1647         if(r < 0)
1648                 goto out;
1649
1650         if (new_keyfile)
1651                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1652                                   &new_password, &new_passwordLen, new_keyfile,
1653                                   new_keyfile_offset, new_keyfile_size);
1654         else
1655                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1656                                       &new_password, &new_passwordLen, 1);
1657         if (r < 0)
1658                 goto out;
1659
1660         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1661                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1662 out:
1663         crypt_safe_free(password);
1664         crypt_safe_free(new_password);
1665         crypt_free_volume_key(vk);
1666         return r < 0 ? r : keyslot;
1667 }
1668
1669 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1670         int keyslot,
1671         const char *keyfile,
1672         size_t keyfile_size,
1673         const char *new_keyfile,
1674         size_t new_keyfile_size)
1675 {
1676         return crypt_keyslot_add_by_keyfile_offset(cd, keyslot,
1677                                 keyfile, keyfile_size, 0,
1678                                 new_keyfile, new_keyfile_size, 0);
1679 }
1680
1681 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1682         int keyslot,
1683         const char *volume_key,
1684         size_t volume_key_size,
1685         const char *passphrase,
1686         size_t passphrase_size)
1687 {
1688         struct volume_key *vk = NULL;
1689         int r = -EINVAL;
1690         char *new_password = NULL; size_t new_passwordLen;
1691
1692         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1693
1694         if (!isLUKS(cd->type)) {
1695                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1696                 return -EINVAL;
1697         }
1698
1699         if (volume_key)
1700                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1701         else if (cd->volume_key)
1702                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1703
1704         if (!vk)
1705                 return -ENOMEM;
1706
1707         r = LUKS_verify_volume_key(&cd->hdr, vk);
1708         if (r < 0) {
1709                 log_err(cd, _("Volume key does not match the volume.\n"));
1710                 goto out;
1711         }
1712
1713         r = keyslot_verify_or_find_empty(cd, &keyslot);
1714         if (r)
1715                 goto out;
1716
1717         if (!passphrase) {
1718                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1719                                       &new_password, &new_passwordLen, 1);
1720                 if (r < 0)
1721                         goto out;
1722                 passphrase = new_password;
1723                 passphrase_size = new_passwordLen;
1724         }
1725
1726         r = LUKS_set_key(keyslot, passphrase, passphrase_size,
1727                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1728 out:
1729         crypt_safe_free(new_password);
1730         crypt_free_volume_key(vk);
1731         return (r < 0) ? r : keyslot;
1732 }
1733
1734 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1735 {
1736         crypt_keyslot_info ki;
1737
1738         log_dbg("Destroying keyslot %d.", keyslot);
1739
1740         if (!isLUKS(cd->type)) {
1741                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1742                 return -EINVAL;
1743         }
1744
1745         ki = crypt_keyslot_status(cd, keyslot);
1746         if (ki == CRYPT_SLOT_INVALID) {
1747                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1748                 return -EINVAL;
1749         }
1750
1751         if (ki == CRYPT_SLOT_INACTIVE) {
1752                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1753                 return -EINVAL;
1754         }
1755
1756         return LUKS_del_key(keyslot, &cd->hdr, cd);
1757 }
1758
1759 // activation/deactivation of device mapping
1760 int crypt_activate_by_passphrase(struct crypt_device *cd,
1761         const char *name,
1762         int keyslot,
1763         const char *passphrase,
1764         size_t passphrase_size,
1765         uint32_t flags)
1766 {
1767         crypt_status_info ci;
1768         struct volume_key *vk = NULL;
1769         char *read_passphrase = NULL;
1770         size_t passphraseLen = 0;
1771         int r;
1772
1773         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1774                 name ? "Activating" : "Checking", name ?: "",
1775                 keyslot, passphrase ? "" : "[none] ");
1776
1777         if (name) {
1778                 ci = crypt_status(NULL, name);
1779                 if (ci == CRYPT_INVALID)
1780                         return -EINVAL;
1781                 else if (ci >= CRYPT_ACTIVE) {
1782                         log_err(cd, _("Device %s already exists.\n"), name);
1783                         return -EEXIST;
1784                 }
1785         }
1786
1787         /* plain, use hashed passphrase */
1788         if (isPLAIN(cd->type)) {
1789                 if (!name)
1790                         return -EINVAL;
1791
1792                 if (!passphrase) {
1793                         r = key_from_terminal(cd, NULL, &read_passphrase,
1794                                               &passphraseLen, 0);
1795                         if (r < 0)
1796                                 goto out;
1797                         passphrase = read_passphrase;
1798                         passphrase_size = passphraseLen;
1799                 }
1800
1801                 r = process_key(cd, cd->plain_hdr.hash,
1802                                 cd->plain_key_size,
1803                                 passphrase, passphrase_size, &vk);
1804                 if (r < 0)
1805                         goto out;
1806
1807                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1808                 keyslot = 0;
1809         } else if (isLUKS(cd->type)) {
1810                 /* provided passphrase, do not retry */
1811                 if (passphrase) {
1812                         r = LUKS_open_key_with_hdr(keyslot, passphrase,
1813                                                    passphrase_size, &cd->hdr, &vk, cd);
1814                 } else
1815                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1816
1817                 if (r >= 0) {
1818                         keyslot = r;
1819                         if (name)
1820                                 r = LUKS1_activate(cd, name, vk, flags);
1821                 }
1822         } else
1823                 r = -EINVAL;
1824 out:
1825         crypt_safe_free(read_passphrase);
1826         crypt_free_volume_key(vk);
1827
1828         return r < 0  ? r : keyslot;
1829 }
1830
1831 int crypt_activate_by_keyfile_offset(struct crypt_device *cd,
1832         const char *name,
1833         int keyslot,
1834         const char *keyfile,
1835         size_t keyfile_size,
1836         size_t keyfile_offset,
1837         uint32_t flags)
1838 {
1839         crypt_status_info ci;
1840         struct volume_key *vk = NULL;
1841         char *passphrase_read = NULL;
1842         size_t passphrase_size_read;
1843         unsigned int key_count = 0;
1844         int r;
1845
1846         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1847                 name ?: "", keyslot, keyfile ?: "[none]");
1848
1849         if (name) {
1850                 ci = crypt_status(NULL, name);
1851                 if (ci == CRYPT_INVALID)
1852                         return -EINVAL;
1853                 else if (ci >= CRYPT_ACTIVE) {
1854                         log_err(cd, _("Device %s already exists.\n"), name);
1855                         return -EEXIST;
1856                 }
1857         }
1858
1859         if (!keyfile)
1860                 return -EINVAL;
1861
1862         if (isPLAIN(cd->type)) {
1863                 if (!name)
1864                         return -EINVAL;
1865
1866                 r = key_from_file(cd, _("Enter passphrase: "),
1867                                   &passphrase_read, &passphrase_size_read,
1868                                   keyfile, keyfile_offset, keyfile_size);
1869                 if (r < 0)
1870                         goto out;
1871
1872                 r = process_key(cd, cd->plain_hdr.hash,
1873                                 cd->plain_key_size,
1874                                 passphrase_read, passphrase_size_read, &vk);
1875                 if (r < 0)
1876                         goto out;
1877
1878                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1879         } else if (isLUKS(cd->type)) {
1880                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1881                           &passphrase_size_read, keyfile, keyfile_offset, keyfile_size);
1882                 if (r < 0)
1883                         goto out;
1884                 r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
1885                                            passphrase_size_read, &cd->hdr, &vk, cd);
1886                 if (r < 0)
1887                         goto out;
1888                 keyslot = r;
1889
1890                 if (name) {
1891                         r = LUKS1_activate(cd, name, vk, flags);
1892                         if (r < 0)
1893                                 goto out;
1894                 }
1895                 r = keyslot;
1896         } else if (isLOOPAES(cd->type)) {
1897                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
1898                                   keyfile, keyfile_offset, keyfile_size);
1899                 if (r < 0)
1900                         goto out;
1901                 r = LOOPAES_parse_keyfile(cd, &vk, cd->loopaes_hdr.hash, &key_count,
1902                                           passphrase_read, passphrase_size_read);
1903                 if (r < 0)
1904                         goto out;
1905                 if (name)
1906                         r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
1907                                              key_count, vk, flags);
1908         } else
1909                 r = -EINVAL;
1910
1911 out:
1912         crypt_safe_free(passphrase_read);
1913         crypt_free_volume_key(vk);
1914
1915         return r;
1916 }
1917
1918 int crypt_activate_by_keyfile(struct crypt_device *cd,
1919         const char *name,
1920         int keyslot,
1921         const char *keyfile,
1922         size_t keyfile_size,
1923         uint32_t flags)
1924 {
1925         return crypt_activate_by_keyfile_offset(cd, name, keyslot, keyfile,
1926                                                 keyfile_size, 0, flags);
1927 }
1928
1929 int crypt_activate_by_volume_key(struct crypt_device *cd,
1930         const char *name,
1931         const char *volume_key,
1932         size_t volume_key_size,
1933         uint32_t flags)
1934 {
1935         crypt_status_info ci;
1936         struct volume_key *vk = NULL;
1937         int r = -EINVAL;
1938
1939         log_dbg("Activating volume %s by volume key.", name ?: "[none]");
1940
1941         if (name) {
1942                 ci = crypt_status(NULL, name);
1943                 if (ci == CRYPT_INVALID)
1944                         return -EINVAL;
1945                 else if (ci >= CRYPT_ACTIVE) {
1946                         log_err(cd, _("Device %s already exists.\n"), name);
1947                         return -EEXIST;
1948                 }
1949         }
1950
1951         /* use key directly, no hash */
1952         if (isPLAIN(cd->type)) {
1953                 if (!name)
1954                         return -EINVAL;
1955
1956                 if (!volume_key || !volume_key_size || volume_key_size != cd->plain_key_size) {
1957                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
1958                         return -EINVAL;
1959                 }
1960
1961                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1962                 if (!vk)
1963                         return -ENOMEM;
1964
1965                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1966         } else if (isLUKS(cd->type)) {
1967                 /* If key is not provided, try to use internal key */
1968                 if (!volume_key) {
1969                         if (!cd->volume_key) {
1970                                 log_err(cd, _("Volume key does not match the volume.\n"));
1971                                 return -EINVAL;
1972                         }
1973                         volume_key_size = cd->volume_key->keylength;
1974                         volume_key = cd->volume_key->key;
1975                 }
1976
1977                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1978                 if (!vk)
1979                         return -ENOMEM;
1980                 r = LUKS_verify_volume_key(&cd->hdr, vk);
1981
1982                 if (r == -EPERM)
1983                         log_err(cd, _("Volume key does not match the volume.\n"));
1984
1985                 if (!r && name)
1986                         r = LUKS1_activate(cd, name, vk, flags);
1987         } else if (isVERITY(cd->type)) {
1988                 /* volume_key == root hash */
1989                 if (!volume_key || !volume_key_size) {
1990                         log_err(cd, _("Incorrect root hash specified for verity device.\n"));
1991                         return -EINVAL;
1992                 }
1993
1994                 r = VERITY_activate(cd, name, volume_key, volume_key_size,
1995                                     &cd->verity_hdr, CRYPT_ACTIVATE_READONLY);
1996
1997                 if (r == -EPERM) {
1998                         free(cd->verity_root_hash);
1999                         cd->verity_root_hash = NULL;
2000                 } if (!r) {
2001                         cd->verity_root_hash_size = volume_key_size;
2002                         if (!cd->verity_root_hash)
2003                                 cd->verity_root_hash = malloc(volume_key_size);
2004                         if (cd->verity_root_hash)
2005                                 memcpy(cd->verity_root_hash, volume_key, volume_key_size);
2006                 }
2007         } else
2008                 log_err(cd, _("Device type is not properly initialised.\n"));
2009
2010         crypt_free_volume_key(vk);
2011
2012         return r;
2013 }
2014
2015 int crypt_deactivate(struct crypt_device *cd, const char *name)
2016 {
2017         int r;
2018
2019         if (!name)
2020                 return -EINVAL;
2021
2022         log_dbg("Deactivating volume %s.", name);
2023
2024         if (!cd)
2025                 dm_backend_init();
2026
2027         switch (crypt_status(cd, name)) {
2028                 case CRYPT_ACTIVE:
2029                 case CRYPT_BUSY:
2030                         r = dm_remove_device(cd, name, 0, 0);
2031                         break;
2032                 case CRYPT_INACTIVE:
2033                         log_err(cd, _("Device %s is not active.\n"), name);
2034                         r = -ENODEV;
2035                         break;
2036                 default:
2037                         log_err(cd, _("Invalid device %s.\n"), name);
2038                         r = -EINVAL;
2039         }
2040
2041         if (!cd)
2042                 dm_backend_exit();
2043
2044         return r;
2045 }
2046
2047 int crypt_volume_key_get(struct crypt_device *cd,
2048         int keyslot,
2049         char *volume_key,
2050         size_t *volume_key_size,
2051         const char *passphrase,
2052         size_t passphrase_size)
2053 {
2054         struct volume_key *vk = NULL;
2055         unsigned key_len;
2056         int r = -EINVAL;
2057
2058         if (crypt_fips_mode()) {
2059                 log_err(cd, "Function not available in FIPS mode.\n");
2060                 return -EACCES;
2061         }
2062
2063         key_len = crypt_get_volume_key_size(cd);
2064         if (key_len > *volume_key_size) {
2065                 log_err(cd, _("Volume key buffer too small.\n"));
2066                 return -ENOMEM;
2067         }
2068
2069         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2070                 r = process_key(cd, cd->plain_hdr.hash, key_len,
2071                                 passphrase, passphrase_size, &vk);
2072                 if (r < 0)
2073                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2074         } else if (isLUKS(cd->type)) {
2075                 r = LUKS_open_key_with_hdr(keyslot, passphrase,
2076                                         passphrase_size, &cd->hdr, &vk, cd);
2077
2078         } else
2079                 log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2080
2081         if (r >= 0) {
2082                 memcpy(volume_key, vk->key, vk->keylength);
2083                 *volume_key_size = vk->keylength;
2084         }
2085
2086         crypt_free_volume_key(vk);
2087         return r;
2088 }
2089
2090 int crypt_volume_key_verify(struct crypt_device *cd,
2091         const char *volume_key,
2092         size_t volume_key_size)
2093 {
2094         struct volume_key *vk;
2095         int r;
2096
2097         if (!isLUKS(cd->type)) {
2098                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2099                 return -EINVAL;
2100         }
2101
2102         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2103         if (!vk)
2104                 return -ENOMEM;
2105
2106         r = LUKS_verify_volume_key(&cd->hdr, vk);
2107
2108         if (r == -EPERM)
2109                 log_err(cd, _("Volume key does not match the volume.\n"));
2110
2111         crypt_free_volume_key(vk);
2112
2113         return r;
2114 }
2115
2116 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2117 {
2118         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2119         cd->timeout = timeout_sec;
2120 }
2121
2122 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2123 {
2124         log_dbg("Password retry count set to %d.", tries);
2125         cd->tries = tries;
2126 }
2127
2128 void crypt_set_iteration_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2129 {
2130         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2131         cd->iteration_time = iteration_time_ms;
2132 }
2133 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2134 {
2135         crypt_set_iteration_time(cd, iteration_time_ms);
2136 }
2137
2138 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2139 {
2140         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2141         cd->password_verify = password_verify ? 1 : 0;
2142 }
2143
2144 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2145 {
2146         switch (rng_type) {
2147         case CRYPT_RNG_URANDOM:
2148         case CRYPT_RNG_RANDOM:
2149                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2150                 cd->rng_type = rng_type;
2151         }
2152 }
2153
2154 int crypt_get_rng_type(struct crypt_device *cd)
2155 {
2156         if (!cd)
2157                 return -EINVAL;
2158
2159         return cd->rng_type;
2160 }
2161
2162 int crypt_memory_lock(struct crypt_device *cd, int lock)
2163 {
2164         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2165 }
2166
2167 // reporting
2168 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2169 {
2170         int r;
2171
2172         if (!cd)
2173                 dm_backend_init();
2174
2175         r = dm_status_device(cd, name);
2176
2177         if (!cd)
2178                 dm_backend_exit();
2179
2180         if (r < 0 && r != -ENODEV)
2181                 return CRYPT_INVALID;
2182
2183         if (r == 0)
2184                 return CRYPT_ACTIVE;
2185
2186         if (r > 0)
2187                 return CRYPT_BUSY;
2188
2189         return CRYPT_INACTIVE;
2190 }
2191
2192 static void hexprint(struct crypt_device *cd, const char *d, int n, const char *sep)
2193 {
2194         int i;
2195         for(i = 0; i < n; i++)
2196                 log_std(cd, "%02hhx%s", (const char)d[i], sep);
2197 }
2198
2199 static int _luks_dump(struct crypt_device *cd)
2200 {
2201         int i;
2202
2203         log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(cd));
2204         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2205         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2206         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2207         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2208         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2209         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2210         log_std(cd, "MK digest:     \t");
2211         hexprint(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE, " ");
2212         log_std(cd, "\n");
2213         log_std(cd, "MK salt:       \t");
2214         hexprint(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2, " ");
2215         log_std(cd, "\n               \t");
2216         hexprint(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2217         log_std(cd, "\n");
2218         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2219         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2220         for(i = 0; i < LUKS_NUMKEYS; i++) {
2221                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2222                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2223                         log_std(cd, "\tIterations:         \t%d\n",
2224                                 cd->hdr.keyblock[i].passwordIterations);
2225                         log_std(cd, "\tSalt:               \t");
2226                         hexprint(cd, cd->hdr.keyblock[i].passwordSalt,
2227                                  LUKS_SALTSIZE/2, " ");
2228                         log_std(cd, "\n\t                      \t");
2229                         hexprint(cd, cd->hdr.keyblock[i].passwordSalt +
2230                                  LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2231                         log_std(cd, "\n");
2232
2233                         log_std(cd, "\tKey material offset:\t%d\n",
2234                                 cd->hdr.keyblock[i].keyMaterialOffset);
2235                         log_std(cd, "\tAF stripes:            \t%d\n",
2236                                 cd->hdr.keyblock[i].stripes);
2237                 }
2238                 else
2239                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2240         }
2241         return 0;
2242 }
2243
2244 static int _verity_dump(struct crypt_device *cd)
2245 {
2246         log_std(cd, "VERITY header information for %s\n", mdata_device_path(cd));
2247         log_std(cd, "UUID:            \t%s\n", cd->verity_uuid ?: "");
2248         log_std(cd, "Hash type:       \t%u\n", cd->verity_hdr.hash_type);
2249         log_std(cd, "Data blocks:     \t%" PRIu64 "\n", cd->verity_hdr.data_size);
2250         log_std(cd, "Data block size: \t%u\n", cd->verity_hdr.data_block_size);
2251         log_std(cd, "Hash block size: \t%u\n", cd->verity_hdr.hash_block_size);
2252         log_std(cd, "Hash algorithm:  \t%s\n", cd->verity_hdr.hash_name);
2253         log_std(cd, "Salt:            \t");
2254         if (cd->verity_hdr.salt_size)
2255                 hexprint(cd, cd->verity_hdr.salt, cd->verity_hdr.salt_size, "");
2256         else
2257                 log_std(cd, "-");
2258         log_std(cd, "\n");
2259         if (cd->verity_root_hash) {
2260                 log_std(cd, "Root hash:      \t");
2261                 hexprint(cd, cd->verity_root_hash, cd->verity_root_hash_size, "");
2262                 log_std(cd, "\n");
2263         }
2264         return 0;
2265 }
2266
2267 int crypt_dump(struct crypt_device *cd)
2268 {
2269         if (isLUKS(cd->type))
2270                 return _luks_dump(cd);
2271         else if (isVERITY(cd->type))
2272                 return _verity_dump(cd);
2273
2274         log_err(cd, _("Dump operation is not supported for this device type.\n"));
2275         return -EINVAL;
2276 }
2277
2278 const char *crypt_get_cipher(struct crypt_device *cd)
2279 {
2280         if (isPLAIN(cd->type))
2281                 return cd->plain_cipher;
2282
2283         if (isLUKS(cd->type))
2284                 return cd->hdr.cipherName;
2285
2286         if (isLOOPAES(cd->type))
2287                 return cd->loopaes_cipher;
2288
2289         return NULL;
2290 }
2291
2292 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2293 {
2294         if (isPLAIN(cd->type))
2295                 return cd->plain_cipher_mode;
2296
2297         if (isLUKS(cd->type))
2298                 return cd->hdr.cipherMode;
2299
2300         if (isLOOPAES(cd->type))
2301                 return cd->loopaes_cipher_mode;
2302
2303         return NULL;
2304 }
2305
2306 const char *crypt_get_uuid(struct crypt_device *cd)
2307 {
2308         if (isLUKS(cd->type))
2309                 return cd->hdr.uuid;
2310
2311         if (isPLAIN(cd->type))
2312                 return cd->plain_uuid;
2313
2314         if (isLOOPAES(cd->type))
2315                 return cd->loopaes_uuid;
2316
2317         if (isVERITY(cd->type))
2318                 return cd->verity_uuid;
2319
2320         return NULL;
2321 }
2322
2323 const char *crypt_get_device_name(struct crypt_device *cd)
2324 {
2325         const char *path = device_block_path(cd->device);
2326
2327         if (!path)
2328                 path = device_path(cd->device);
2329
2330         return path;
2331 }
2332
2333 int crypt_get_volume_key_size(struct crypt_device *cd)
2334 {
2335         if (isPLAIN(cd->type))
2336                 return cd->plain_key_size;
2337
2338         if (isLUKS(cd->type))
2339                 return cd->hdr.keyBytes;
2340
2341         if (isLOOPAES(cd->type))
2342                 return cd->loopaes_key_size;
2343
2344         if (isVERITY(cd->type))
2345                 return cd->verity_root_hash_size;
2346
2347         return 0;
2348 }
2349
2350 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2351 {
2352         if (isPLAIN(cd->type))
2353                 return cd->plain_hdr.offset;
2354
2355         if (isLUKS(cd->type))
2356                 return cd->hdr.payloadOffset;
2357
2358         if (isLOOPAES(cd->type))
2359                 return cd->loopaes_hdr.offset;
2360
2361         return 0;
2362 }
2363
2364 uint64_t crypt_get_iv_offset(struct crypt_device *cd)
2365 {
2366         if (isPLAIN(cd->type))
2367                 return cd->plain_hdr.skip;
2368
2369         if (isLUKS(cd->type))
2370                 return 0;
2371
2372         if (isLOOPAES(cd->type))
2373                 return cd->loopaes_hdr.skip;
2374
2375         return 0;
2376 }
2377
2378 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2379 {
2380         if (!isLUKS(cd->type)) {
2381                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2382                 return CRYPT_SLOT_INVALID;
2383         }
2384
2385         return LUKS_keyslot_info(&cd->hdr, keyslot);
2386 }
2387
2388 int crypt_keyslot_max(const char *type)
2389 {
2390         if (type && isLUKS(type))
2391                 return LUKS_NUMKEYS;
2392
2393         return -EINVAL;
2394 }
2395
2396 int crypt_keyslot_area(struct crypt_device *cd,
2397         int keyslot,
2398         uint64_t *offset,
2399         uint64_t *length)
2400 {
2401         if (!isLUKS(cd->type))
2402                 return -EINVAL;
2403
2404         return LUKS_keyslot_area(&cd->hdr, keyslot, offset, length);
2405 }
2406
2407 const char *crypt_get_type(struct crypt_device *cd)
2408 {
2409         return cd->type;
2410 }
2411
2412 int crypt_get_verity_info(struct crypt_device *cd,
2413         struct crypt_params_verity *vp)
2414 {
2415         if (!isVERITY(cd->type) || !vp)
2416                 return -EINVAL;
2417
2418         vp->data_device = device_path(cd->device);
2419         vp->hash_device = mdata_device_path(cd);
2420         vp->hash_name = cd->verity_hdr.hash_name;
2421         vp->salt = cd->verity_hdr.salt;
2422         vp->salt_size = cd->verity_hdr.salt_size;
2423         vp->data_block_size = cd->verity_hdr.data_block_size;
2424         vp->hash_block_size = cd->verity_hdr.hash_block_size;
2425         vp->data_size = cd->verity_hdr.data_size;
2426         vp->hash_area_offset = cd->verity_hdr.hash_area_offset;
2427         vp->hash_type = cd->verity_hdr.hash_type;
2428         vp->flags = cd->verity_hdr.flags & CRYPT_VERITY_NO_HEADER;
2429         return 0;
2430 }
2431
2432 int crypt_get_active_device(struct crypt_device *cd __attribute__((unused)),
2433                             const char *name,
2434                             struct crypt_active_device *cad)
2435 {
2436         struct crypt_dm_active_device dmd;
2437         int r;
2438
2439         r = dm_query_device(cd, name, 0, &dmd);
2440         if (r < 0)
2441                 return r;
2442
2443         if (dmd.target != DM_CRYPT && dmd.target != DM_VERITY)
2444                 return -ENOTSUP;
2445
2446         cad->offset     = dmd.u.crypt.offset;
2447         cad->iv_offset  = dmd.u.crypt.iv_offset;
2448         cad->size       = dmd.size;
2449         cad->flags      = dmd.flags;
2450
2451         return 0;
2452 }