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