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(name, CRYPT_PLAIN, &dmd, 0);
 348
 349         // FIXME
 350         if (!cd->plain_uuid && dm_query_device(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         if (dm_init(h, 1) < 0) {
 534                 r = -ENOSYS;
 535                 goto bad;
 536         }
 537
 538         h->iteration_time = 1000;
 539         h->password_verify = 0;
 540         h->tries = 3;
 541         h->rng_type = crypt_random_default_key_rng();
 542         *cd = h;
 543         return 0;
 544 bad:
 545         device_free(h->device);
 546         free(h);
 547         return r;
 548 }
 549
 550 static int crypt_check_data_device_size(struct crypt_device *cd)
 551 {
 552         int r;
 553         uint64_t size, size_min;
 554
 555         /* Check data device size, require at least one sector */
 556         size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE;
 557
 558         r = device_size(cd->device, &size);
 559         if (r < 0)
 560                 return r;
 561
 562         if (size < size_min) {
 563                 log_err(cd, _("Header detected but device %s is too small.\n"),
 564                         device_path(cd->device));
 565                 return -EINVAL;
 566         }
 567
 568         return r;
 569 }
 570
 571 int crypt_set_data_device(struct crypt_device *cd, const char *device)
 572 {
 573         struct device *dev = NULL;
 574         int r;
 575
 576         log_dbg("Setting ciphertext data device to %s.", device ?: "(none)");
 577
 578         if (!isLUKS(cd->type) && !isVERITY(cd->type)) {
 579                 log_err(cd, _("This operation is not supported for this device type.\n"));
 580                 return  -EINVAL;
 581         }
 582
 583         /* metadata device must be set */
 584         if (!cd->device || !device)
 585                 return -EINVAL;
 586
 587         r = device_alloc(&dev, device);
 588         if (r < 0)
 589                 return r;
 590
 591         if (!cd->metadata_device) {
 592                 cd->metadata_device = cd->device;
 593         } else
 594                 device_free(cd->device);
 595
 596         cd->device = dev;
 597
 598         return crypt_check_data_device_size(cd);
 599 }
 600
 601 static int _crypt_load_luks1(struct crypt_device *cd, int require_header, int repair)
 602 {
 603         struct luks_phdr hdr;
 604         int r;
 605
 606         r = init_crypto(cd);
 607         if (r < 0)
 608                 return r;
 609
 610         r = LUKS_read_phdr(&hdr, require_header, repair, cd);
 611         if (r < 0)
 612                 return r;
 613
 614         if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1)))
 615                 return -ENOMEM;
 616
 617         memcpy(&cd->hdr, &hdr, sizeof(hdr));
 618
 619         return r;
 620 }
 621
 622 static int _crypt_load_verity(struct crypt_device *cd, struct crypt_params_verity *params)
 623 {
 624         int r;
 625         size_t sb_offset = 0;
 626
 627         r = init_crypto(cd);
 628         if (r < 0)
 629                 return r;
 630
 631         if (params->flags & CRYPT_VERITY_NO_HEADER)
 632                 return -EINVAL;
 633
 634         if (params)
 635                 sb_offset = params->hash_area_offset;
 636
 637         r = VERITY_read_sb(cd, sb_offset, &cd->verity_uuid, &cd->verity_hdr);
 638         if (r < 0)
 639                 return r;
 640
 641         if (params)
 642                 cd->verity_hdr.flags = params->flags;
 643
 644         /* Hash availability checked in sb load */
 645         cd->verity_root_hash_size = crypt_hash_size(cd->verity_hdr.hash_name);
 646         if (cd->verity_root_hash_size > 4096)
 647                 return -EINVAL;
 648
 649         if (!cd->type && !(cd->type = strdup(CRYPT_VERITY)))
 650                 return -ENOMEM;
 651
 652         if (params && params->data_device &&
 653             (r = crypt_set_data_device(cd, params->data_device)) < 0)
 654                 return r;
 655
 656         return r;
 657 }
 658
 659 static int _init_by_name_crypt(struct crypt_device *cd, const char *name)
 660 {
 661         struct crypt_dm_active_device dmd = {};
 662         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
 663         int key_nums, r;
 664
 665         r = dm_query_device(name, DM_ACTIVE_DEVICE |
 666                                    DM_ACTIVE_UUID |
 667                                    DM_ACTIVE_CRYPT_CIPHER |
 668                                    DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
 669         if (r < 0)
 670                 goto out;
 671
 672         if (isPLAIN(cd->type)) {
 673                 cd->plain_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
 674                 cd->plain_hdr.hash = NULL; /* no way to get this */
 675                 cd->plain_hdr.offset = dmd.u.crypt.offset;
 676                 cd->plain_hdr.skip = dmd.u.crypt.iv_offset;
 677                 cd->plain_key_size = dmd.u.crypt.vk->keylength;
 678
 679                 r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher, NULL, cipher_mode);
 680                 if (!r) {
 681                         cd->plain_cipher = strdup(cipher);
 682                         cd->plain_cipher_mode = strdup(cipher_mode);
 683                 }
 684         } else if (isLOOPAES(cd->type)) {
 685                 cd->loopaes_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
 686                 cd->loopaes_hdr.offset = dmd.u.crypt.offset;
 687
 688                 r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher,
 689                                               &key_nums, cipher_mode);
 690                 if (!r) {
 691                         cd->loopaes_cipher = strdup(cipher);
 692                         cd->loopaes_cipher_mode = strdup(cipher_mode);
 693                         /* version 3 uses last key for IV */
 694                         if (dmd.u.crypt.vk->keylength % key_nums)
 695                                 key_nums++;
 696                         cd->loopaes_key_size = dmd.u.crypt.vk->keylength / key_nums;
 697                 }
 698         } else if (isLUKS(cd->type)) {
 699                 if (crypt_metadata_device(cd)) {
 700                         r = _crypt_load_luks1(cd, 0, 0);
 701                         if (r < 0) {
 702                                 log_dbg("LUKS device header does not match active device.");
 703                                 free(cd->type);
 704                                 cd->type = NULL;
 705                                 r = 0;
 706                                 goto out;
 707                         }
 708                         /* check whether UUIDs match each other */
 709                         r = crypt_uuid_cmp(dmd.uuid, cd->hdr.uuid);
 710                         if (r < 0) {
 711                                 log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s",
 712                                         cd->hdr.uuid, dmd.uuid);
 713                                 free(cd->type);
 714                                 cd->type = NULL;
 715                                 r = 0;
 716                                 goto out;
 717                         }
 718                 }
 719         }
 720 out:
 721         crypt_free_volume_key(dmd.u.crypt.vk);
 722         device_free(dmd.data_device);
 723         free(CONST_CAST(void*)dmd.u.crypt.cipher);
 724         free(CONST_CAST(void*)dmd.uuid);
 725         return r;
 726 }
 727
 728 static int _init_by_name_verity(struct crypt_device *cd, const char *name)
 729 {
 730         struct crypt_params_verity params = {};
 731         struct crypt_dm_active_device dmd = {
 732                 .target = DM_VERITY,
 733                 .u.verity.vp = &params,
 734         };
 735         int r;
 736
 737         r = dm_query_device(name, DM_ACTIVE_DEVICE |
 738                                    DM_ACTIVE_UUID |
 739                                    DM_ACTIVE_VERITY_HASH_DEVICE |
 740                                    DM_ACTIVE_VERITY_PARAMS, &dmd);
 741         if (r < 0)
 742                 goto out;
 743
 744         if (isVERITY(cd->type)) {
 745                 cd->verity_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
 746                 cd->verity_hdr.flags = CRYPT_VERITY_NO_HEADER; //FIXME
 747                 cd->verity_hdr.data_size = params.data_size;
 748                 cd->verity_root_hash_size = dmd.u.verity.root_hash_size;
 749                 cd->verity_root_hash = NULL;
 750                 cd->verity_hdr.hash_name = params.hash_name;
 751                 cd->verity_hdr.data_device = NULL;
 752                 cd->verity_hdr.hash_device = NULL;
 753                 cd->verity_hdr.data_block_size = params.data_block_size;
 754                 cd->verity_hdr.hash_block_size = params.hash_block_size;
 755                 cd->verity_hdr.hash_area_offset = dmd.u.verity.hash_offset;
 756                 cd->verity_hdr.hash_type = params.hash_type;
 757                 cd->verity_hdr.flags = params.flags;
 758                 cd->verity_hdr.salt_size = params.salt_size;
 759                 cd->verity_hdr.salt = params.salt;
 760                 cd->metadata_device = dmd.u.verity.hash_device;
 761         }
 762 out:
 763         device_free(dmd.data_device);
 764         free(CONST_CAST(void*)dmd.uuid);
 765         return r;
 766 }
 767
 768 int crypt_init_by_name_and_header(struct crypt_device **cd,
 769                                   const char *name,
 770                                   const char *header_device)
 771 {
 772         crypt_status_info ci;
 773         struct crypt_dm_active_device dmd;
 774         int r;
 775
 776         log_dbg("Allocating crypt device context by device %s.", name);
 777
 778         ci = crypt_status(NULL, name);
 779         if (ci == CRYPT_INVALID)
 780                 return -ENODEV;
 781
 782         if (ci < CRYPT_ACTIVE) {
 783                 log_err(NULL, _("Device %s is not active.\n"), name);
 784                 return -ENODEV;
 785         }
 786
 787         r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd);
 788         if (r < 0)
 789                 goto out;
 790
 791         *cd = NULL;
 792
 793         if (header_device) {
 794                 r = crypt_init(cd, header_device);
 795         } else {
 796                 r = crypt_init(cd, device_path(dmd.data_device));
 797
 798                 /* Underlying device disappeared but mapping still active */
 799                 if (!dmd.data_device || r == -ENOTBLK)
 800                         log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
 801                                     name);
 802
 803                 /* Underlying device is not readable but crypt mapping exists */
 804                 if (r == -ENOTBLK) {
 805                         device_free(dmd.data_device);
 806                         dmd.data_device = NULL;
 807                         r = crypt_init(cd, NULL);
 808                 }
 809         }
 810
 811         if (r < 0)
 812                 goto out;
 813
 814         if (dmd.uuid) {
 815                 if (!strncmp(CRYPT_PLAIN, dmd.uuid, sizeof(CRYPT_PLAIN)-1))
 816                         (*cd)->type = strdup(CRYPT_PLAIN);
 817                 else if (!strncmp(CRYPT_LOOPAES, dmd.uuid, sizeof(CRYPT_LOOPAES)-1))
 818                         (*cd)->type = strdup(CRYPT_LOOPAES);
 819                 else if (!strncmp(CRYPT_LUKS1, dmd.uuid, sizeof(CRYPT_LUKS1)-1))
 820                         (*cd)->type = strdup(CRYPT_LUKS1);
 821                 else if (!strncmp(CRYPT_VERITY, dmd.uuid, sizeof(CRYPT_VERITY)-1))
 822                         (*cd)->type = strdup(CRYPT_VERITY);
 823                 else
 824                         log_dbg("Unknown UUID set, some parameters are not set.");
 825         } else
 826                 log_dbg("Active device has no UUID set, some parameters are not set.");
 827
 828         if (header_device) {
 829                 r = crypt_set_data_device(*cd, device_path(dmd.data_device));
 830                 if (r < 0)
 831                         goto out;
 832         }
 833
 834         /* Try to initialise basic parameters from active device */
 835
 836         if (dmd.target == DM_CRYPT)
 837                 r = _init_by_name_crypt(*cd, name);
 838         else if (dmd.target == DM_VERITY)
 839                 r = _init_by_name_verity(*cd, name);
 840 out:
 841         if (r < 0) {
 842                 crypt_free(*cd);
 843                 *cd = NULL;
 844         }
 845         device_free(dmd.data_device);
 846         free(CONST_CAST(void*)dmd.uuid);
 847         return r;
 848 }
 849
 850 int crypt_init_by_name(struct crypt_device **cd, const char *name)
 851 {
 852         return crypt_init_by_name_and_header(cd, name, NULL);
 853 }
 854
 855 static int _crypt_format_plain(struct crypt_device *cd,
 856                                const char *cipher,
 857                                const char *cipher_mode,
 858                                const char *uuid,
 859                                size_t volume_key_size,
 860                                struct crypt_params_plain *params)
 861 {
 862         if (!cipher || !cipher_mode) {
 863                 log_err(cd, _("Invalid plain crypt parameters.\n"));
 864                 return -EINVAL;
 865         }
 866
 867         if (volume_key_size > 1024) {
 868                 log_err(cd, _("Invalid key size.\n"));
 869                 return -EINVAL;
 870         }
 871
 872         if (!(cd->type = strdup(CRYPT_PLAIN)))
 873                 return -ENOMEM;
 874
 875         cd->plain_key_size = volume_key_size;
 876         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
 877         if (!cd->volume_key)
 878                 return -ENOMEM;
 879
 880         cd->plain_cipher = strdup(cipher);
 881         cd->plain_cipher_mode = strdup(cipher_mode);
 882
 883         if (uuid)
 884                 cd->plain_uuid = strdup(uuid);
 885
 886         if (params && params->hash)
 887                 cd->plain_hdr.hash = strdup(params->hash);
 888
 889         cd->plain_hdr.offset = params ? params->offset : 0;
 890         cd->plain_hdr.skip = params ? params->skip : 0;
 891         cd->plain_hdr.size = params ? params->size : 0;
 892
 893         if (!cd->plain_cipher || !cd->plain_cipher_mode)
 894                 return -ENOMEM;
 895
 896         return 0;
 897 }
 898
 899 static int _crypt_format_luks1(struct crypt_device *cd,
 900                                const char *cipher,
 901                                const char *cipher_mode,
 902                                const char *uuid,
 903                                const char *volume_key,
 904                                size_t volume_key_size,
 905                                struct crypt_params_luks1 *params)
 906 {
 907         int r;
 908         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
 909         unsigned long alignment_offset = 0;
 910
 911         if (!crypt_metadata_device(cd)) {
 912                 log_err(cd, _("Can't format LUKS without device.\n"));
 913                 return -EINVAL;
 914         }
 915
 916         if (!(cd->type = strdup(CRYPT_LUKS1)))
 917                 return -ENOMEM;
 918
 919         if (volume_key)
 920                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
 921                                                       volume_key);
 922         else
 923                 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
 924
 925         if(!cd->volume_key)
 926                 return -ENOMEM;
 927
 928         if (params && params->data_device) {
 929                 cd->metadata_device = cd->device;
 930                 cd->device = NULL;
 931                 if (device_alloc(&cd->device, params->data_device) < 0)
 932                         return -ENOMEM;
 933                 required_alignment = params->data_alignment * SECTOR_SIZE;
 934         } else if (params && params->data_alignment) {
 935                 required_alignment = params->data_alignment * SECTOR_SIZE;
 936         } else
 937                 device_topology_alignment(cd->device,
 938                                        &required_alignment,
 939                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
 940
 941         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
 942                                (params && params->hash) ? params->hash : "sha1",
 943                                uuid, LUKS_STRIPES,
 944                                required_alignment / SECTOR_SIZE,
 945                                alignment_offset / SECTOR_SIZE,
 946                                cd->iteration_time, &cd->PBKDF2_per_sec,
 947                                cd->metadata_device ? 1 : 0, cd);
 948         if(r < 0)
 949                 return r;
 950
 951         /* Wipe first 8 sectors - fs magic numbers etc. */
 952         r = crypt_wipe(crypt_metadata_device(cd), 0, 8 * SECTOR_SIZE, CRYPT_WIPE_ZERO, 1);
 953         if(r < 0) {
 954                 if (r == -EBUSY)
 955                         log_err(cd, _("Cannot format device %s which is still in use.\n"),
 956                                 mdata_device_path(cd));
 957                 else
 958                         log_err(cd, _("Cannot wipe header on device %s.\n"),
 959                                 mdata_device_path(cd));
 960
 961                 return r;
 962         }
 963
 964         r = LUKS_write_phdr(&cd->hdr, cd);
 965
 966         return r;
 967 }
 968
 969 static int _crypt_format_loopaes(struct crypt_device *cd,
 970                                  const char *cipher,
 971                                  const char *uuid,
 972                                  size_t volume_key_size,
 973                                  struct crypt_params_loopaes *params)
 974 {
 975         if (!crypt_metadata_device(cd)) {
 976                 log_err(cd, _("Can't format LOOPAES without device.\n"));
 977                 return -EINVAL;
 978         }
 979
 980         if (volume_key_size > 1024) {
 981                 log_err(cd, _("Invalid key size.\n"));
 982                 return -EINVAL;
 983         }
 984
 985         if (!(cd->type = strdup(CRYPT_LOOPAES)))
 986                 return -ENOMEM;
 987
 988         cd->loopaes_key_size = volume_key_size;
 989
 990         cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
 991
 992         if (uuid)
 993                 cd->loopaes_uuid = strdup(uuid);
 994
 995         if (params && params->hash)
 996                 cd->loopaes_hdr.hash = strdup(params->hash);
 997
 998         cd->loopaes_hdr.offset = params ? params->offset : 0;
 999         cd->loopaes_hdr.skip = params ? params->skip : 0;
1000
1001         return 0;
1002 }
1003
1004 static int _crypt_format_verity(struct crypt_device *cd,
1005                                  const char *uuid,
1006                                  struct crypt_params_verity *params)
1007 {
1008         int r = 0, hash_size;
1009         uint64_t data_device_size;
1010
1011         if (!crypt_metadata_device(cd)) {
1012                 log_err(cd, _("Can't format VERITY without device.\n"));
1013                 return -EINVAL;
1014         }
1015
1016         if (!params || !params->data_device)
1017                 return -EINVAL;
1018
1019         if (params->hash_type > VERITY_MAX_HASH_TYPE) {
1020                 log_err(cd, _("Unsupported VERITY hash type %d.\n"), params->hash_type);
1021                 return -EINVAL;
1022         }
1023
1024         if (VERITY_BLOCK_SIZE_OK(params->data_block_size) ||
1025             VERITY_BLOCK_SIZE_OK(params->hash_block_size)) {
1026                 log_err(cd, _("Unsupported VERITY block size.\n"));
1027                 return -EINVAL;
1028         }
1029
1030         if (params->hash_area_offset % 512) {
1031                 log_err(cd, _("Unsupported VERITY hash offset.\n"));
1032                 return -EINVAL;
1033         }
1034
1035         if (!(cd->type = strdup(CRYPT_VERITY)))
1036                 return -ENOMEM;
1037
1038         r = crypt_set_data_device(cd, params->data_device);
1039         if (r)
1040                 return r;
1041         if (!params->data_size) {
1042                 r = device_size(cd->device, &data_device_size);
1043                 if (r < 0)
1044                         return r;
1045
1046                 cd->verity_hdr.data_size = data_device_size / params->data_block_size;
1047         } else
1048                 cd->verity_hdr.data_size = params->data_size;
1049
1050         hash_size = crypt_hash_size(params->hash_name);
1051         if (hash_size <= 0) {
1052                 log_err(cd, _("Hash algorithm %s not supported.\n"),
1053                         params->hash_name);
1054                 return -EINVAL;
1055         }
1056         cd->verity_root_hash_size = hash_size;
1057
1058         cd->verity_root_hash = malloc(cd->verity_root_hash_size);
1059         if (!cd->verity_root_hash)
1060                 return -ENOMEM;
1061
1062         cd->verity_hdr.flags = params->flags;
1063         cd->verity_hdr.hash_name = strdup(params->hash_name);
1064         cd->verity_hdr.data_device = NULL;
1065         cd->verity_hdr.data_block_size = params->data_block_size;
1066         cd->verity_hdr.hash_block_size = params->hash_block_size;
1067         cd->verity_hdr.hash_area_offset = params->hash_area_offset;
1068         cd->verity_hdr.hash_type = params->hash_type;
1069         cd->verity_hdr.flags = params->flags;
1070         cd->verity_hdr.salt_size = params->salt_size;
1071         cd->verity_hdr.salt = malloc(params->salt_size);
1072         if (params->salt)
1073                 memcpy(CONST_CAST(char*)cd->verity_hdr.salt, params->salt,
1074                        params->salt_size);
1075         else
1076                 r = crypt_random_get(cd, CONST_CAST(char*)cd->verity_hdr.salt,
1077                                      params->salt_size, CRYPT_RND_SALT);
1078         if (r)
1079                 return r;
1080
1081         if (params->flags & CRYPT_VERITY_CREATE_HASH) {
1082                 r = VERITY_create(cd, &cd->verity_hdr,
1083                                   cd->verity_root_hash, cd->verity_root_hash_size);
1084                 if (r)
1085                         return r;
1086         }
1087
1088         if (!(params->flags & CRYPT_VERITY_NO_HEADER)) {
1089                 if (uuid)
1090                         cd->verity_uuid = strdup(uuid);
1091                 else {
1092                         r = VERITY_UUID_generate(cd, &cd->verity_uuid);
1093                         if (r)
1094                                 return r;
1095                 }
1096
1097                 r = VERITY_write_sb(cd, cd->verity_hdr.hash_area_offset,
1098                                     cd->verity_uuid,
1099                                     &cd->verity_hdr);
1100         }
1101         return r;
1102 }
1103
1104 int crypt_format(struct crypt_device *cd,
1105         const char *type,
1106         const char *cipher,
1107         const char *cipher_mode,
1108         const char *uuid,
1109         const char *volume_key,
1110         size_t volume_key_size,
1111         void *params)
1112 {
1113         int r;
1114
1115         if (!type)
1116                 return -EINVAL;
1117
1118         if (cd->type) {
1119                 log_dbg("Context already formatted as %s.", cd->type);
1120                 return -EINVAL;
1121         }
1122
1123         log_dbg("Formatting device %s as type %s.", mdata_device_path(cd) ?: "(none)", type);
1124
1125         r = init_crypto(cd);
1126         if (r < 0)
1127                 return r;
1128
1129         if (isPLAIN(type))
1130                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1131                                         uuid, volume_key_size, params);
1132         else if (isLUKS(type))
1133                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1134                                         uuid, volume_key, volume_key_size, params);
1135         else if (isLOOPAES(type))
1136                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1137         else if (isVERITY(type))
1138                 r = _crypt_format_verity(cd, uuid, params);
1139         else {
1140                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1141                 r = -EINVAL;
1142         }
1143
1144         if (r < 0) {
1145                 free(cd->type);
1146                 cd->type = NULL;
1147                 crypt_free_volume_key(cd->volume_key);
1148                 cd->volume_key = NULL;
1149         }
1150
1151         return r;
1152 }
1153
1154 int crypt_load(struct crypt_device *cd,
1155                const char *requested_type,
1156                void *params)
1157 {
1158         int r;
1159
1160         log_dbg("Trying to load %s crypt type from device %s.",
1161                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1162
1163         if (!crypt_metadata_device(cd))
1164                 return -EINVAL;
1165
1166         if (!requested_type || isLUKS(requested_type)) {
1167                 if (cd->type && !isLUKS(cd->type)) {
1168                         log_dbg("Context is already initialised to type %s", cd->type);
1169                         return -EINVAL;
1170                 }
1171
1172                 r = _crypt_load_luks1(cd, 1, 0);
1173         } else if (isVERITY(requested_type)) {
1174                 if (cd->type && !isVERITY(cd->type)) {
1175                         log_dbg("Context is already initialised to type %s", cd->type);
1176                         return -EINVAL;
1177                 }
1178                 r = _crypt_load_verity(cd, params);
1179         } else
1180                 return -EINVAL;
1181
1182         return r;
1183 }
1184
1185 int crypt_repair(struct crypt_device *cd,
1186                  const char *requested_type,
1187                  void *params __attribute__((unused)))
1188 {
1189         int r;
1190
1191         log_dbg("Trying to repair %s crypt type from device %s.",
1192                 requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
1193
1194         if (!crypt_metadata_device(cd))
1195                 return -EINVAL;
1196
1197         if (requested_type && !isLUKS(requested_type))
1198                 return -EINVAL;
1199
1200
1201         /* Load with repair */
1202         r = _crypt_load_luks1(cd, 1, 1);
1203         if (r < 0)
1204                 return r;
1205
1206         /* cd->type and header must be set in context */
1207         r = crypt_check_data_device_size(cd);
1208         if (r < 0) {
1209                 free(cd->type);
1210                 cd->type = NULL;
1211         }
1212
1213         return r;
1214 }
1215
1216 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1217 {
1218         struct crypt_dm_active_device dmd;
1219         int r;
1220
1221         /* Device context type must be initialised */
1222         if (!cd->type || !crypt_get_uuid(cd))
1223                 return -EINVAL;
1224
1225         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1226
1227         r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_CRYPT_CIPHER |
1228                                   DM_ACTIVE_UUID | DM_ACTIVE_CRYPT_KEYSIZE |
1229                                   DM_ACTIVE_CRYPT_KEY, &dmd);
1230         if (r < 0) {
1231                 log_err(NULL, _("Device %s is not active.\n"), name);
1232                 return -EINVAL;
1233         }
1234
1235         if (!dmd.uuid || dmd.target != DM_CRYPT) {
1236                 r = -EINVAL;
1237                 goto out;
1238         }
1239
1240         r = device_block_adjust(cd, dmd.data_device, DEV_OK,
1241                                 dmd.u.crypt.offset, &new_size, &dmd.flags);
1242         if (r)
1243                 goto out;
1244
1245         if (new_size == dmd.size) {
1246                 log_dbg("Device has already requested size %" PRIu64
1247                         " sectors.", dmd.size);
1248                 r = 0;
1249         } else {
1250                 dmd.size = new_size;
1251                 r = dm_create_device(name, cd->type, &dmd, 1);
1252         }
1253 out:
1254         if (dmd.target == DM_CRYPT) {
1255                 crypt_free_volume_key(dmd.u.crypt.vk);
1256                 free(CONST_CAST(void*)dmd.u.crypt.cipher);
1257         }
1258         free(CONST_CAST(void*)dmd.data_device);
1259         free(CONST_CAST(void*)dmd.uuid);
1260
1261         return r;
1262 }
1263
1264 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1265 {
1266         if (!isLUKS(cd->type)) {
1267                 log_err(cd, _("This operation is not supported for this device type.\n"));
1268                 return  -EINVAL;
1269         }
1270
1271         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1272                 log_dbg("UUID is the same as requested (%s) for device %s.",
1273                         uuid, mdata_device_path(cd));
1274                 return 0;
1275         }
1276
1277         if (uuid)
1278                 log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device_path(cd));
1279         else
1280                 log_dbg("Requested new UUID refresh for %s.", mdata_device_path(cd));
1281
1282         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1283                 return -EPERM;
1284
1285         return LUKS_hdr_uuid_set(&cd->hdr, uuid, cd);
1286 }
1287
1288 int crypt_header_backup(struct crypt_device *cd,
1289                         const char *requested_type,
1290                         const char *backup_file)
1291 {
1292         int r;
1293
1294         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1295                 return -EINVAL;
1296
1297         r = init_crypto(cd);
1298         if (r < 0)
1299                 return r;
1300
1301         log_dbg("Requested header backup of device %s (%s) to "
1302                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1303
1304         return LUKS_hdr_backup(backup_file, &cd->hdr, cd);
1305 }
1306
1307 int crypt_header_restore(struct crypt_device *cd,
1308                          const char *requested_type,
1309                          const char *backup_file)
1310 {
1311         int r;
1312
1313         if (requested_type && !isLUKS(requested_type))
1314                 return -EINVAL;
1315
1316         r = init_crypto(cd);
1317         if (r < 0)
1318                 return r;
1319
1320         log_dbg("Requested header restore to device %s (%s) from "
1321                 "file %s.", mdata_device_path(cd), requested_type, backup_file);
1322
1323         return LUKS_hdr_restore(backup_file, &cd->hdr, cd);
1324 }
1325
1326 void crypt_free(struct crypt_device *cd)
1327 {
1328         if (cd) {
1329                 log_dbg("Releasing crypt device %s context.", mdata_device_path(cd));
1330
1331                 dm_exit();
1332                 crypt_free_volume_key(cd->volume_key);
1333
1334                 device_free(cd->device);
1335                 device_free(cd->metadata_device);
1336                 free(cd->type);
1337
1338                 /* used in plain device only */
1339                 free(CONST_CAST(void*)cd->plain_hdr.hash);
1340                 free(cd->plain_cipher);
1341                 free(cd->plain_cipher_mode);
1342                 free(cd->plain_uuid);
1343
1344                 /* used in loop-AES device only */
1345                 free(CONST_CAST(void*)cd->loopaes_hdr.hash);
1346                 free(cd->loopaes_cipher);
1347                 free(cd->loopaes_uuid);
1348
1349                 /* used in verity device only */
1350                 free(CONST_CAST(void*)cd->verity_hdr.hash_name);
1351                 free(CONST_CAST(void*)cd->verity_hdr.salt);
1352                 free(cd->verity_root_hash);
1353                 free(cd->verity_uuid);
1354
1355                 free(cd);
1356         }
1357 }
1358
1359 int crypt_suspend(struct crypt_device *cd,
1360                   const char *name)
1361 {
1362         crypt_status_info ci;
1363         int r;
1364
1365         log_dbg("Suspending volume %s.", name);
1366
1367         if (!isLUKS(cd->type)) {
1368                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1369                 r = -EINVAL;
1370                 goto out;
1371         }
1372
1373         ci = crypt_status(NULL, name);
1374         if (ci < CRYPT_ACTIVE) {
1375                 log_err(cd, _("Volume %s is not active.\n"), name);
1376                 return -EINVAL;
1377         }
1378
1379         if (!cd && dm_init(NULL, 1) < 0)
1380                 return -ENOSYS;
1381
1382         r = dm_status_suspended(name);
1383         if (r < 0)
1384                 goto out;
1385
1386         if (r) {
1387                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1388                 r = -EINVAL;
1389                 goto out;
1390         }
1391
1392         r = dm_suspend_and_wipe_key(name);
1393         if (r == -ENOTSUP)
1394                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1395         else if (r)
1396                 log_err(cd, "Error during suspending device %s.\n", name);
1397 out:
1398         if (!cd)
1399                 dm_exit();
1400         return r;
1401 }
1402
1403 int crypt_resume_by_passphrase(struct crypt_device *cd,
1404                                const char *name,
1405                                int keyslot,
1406                                const char *passphrase,
1407                                size_t passphrase_size)
1408 {
1409         struct volume_key *vk = NULL;
1410         int r;
1411
1412         log_dbg("Resuming volume %s.", name);
1413
1414         if (!isLUKS(cd->type)) {
1415                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1416                 r = -EINVAL;
1417                 goto out;
1418         }
1419
1420         r = dm_status_suspended(name);
1421         if (r < 0)
1422                 return r;
1423
1424         if (!r) {
1425                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1426                 return -EINVAL;
1427         }
1428
1429         if (passphrase) {
1430                 r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size,
1431                                            &cd->hdr, &vk, cd);
1432         } else
1433                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1434
1435         if (r >= 0) {
1436                 keyslot = r;
1437                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1438                 if (r == -ENOTSUP)
1439                         log_err(cd, "Resume is not supported for device %s.\n", name);
1440                 else if (r)
1441                         log_err(cd, "Error during resuming device %s.\n", name);
1442         } else
1443                 r = keyslot;
1444 out:
1445         crypt_free_volume_key(vk);
1446         return r < 0 ? r : keyslot;
1447 }
1448
1449 int crypt_resume_by_keyfile_offset(struct crypt_device *cd,
1450                                    const char *name,
1451                                    int keyslot,
1452                                    const char *keyfile,
1453                                    size_t keyfile_size,
1454                                    size_t keyfile_offset)
1455 {
1456         struct volume_key *vk = NULL;
1457         char *passphrase_read = NULL;
1458         size_t passphrase_size_read;
1459         int r;
1460
1461         log_dbg("Resuming volume %s.", name);
1462
1463         if (!isLUKS(cd->type)) {
1464                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1465                 r = -EINVAL;
1466                 goto out;
1467         }
1468
1469         r = dm_status_suspended(name);
1470         if (r < 0)
1471                 return r;
1472
1473         if (!r) {
1474                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1475                 return -EINVAL;
1476         }
1477
1478         if (!keyfile)
1479                 return -EINVAL;
1480
1481         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1482                           &passphrase_size_read, keyfile, keyfile_offset,
1483                           keyfile_size);
1484         if (r < 0)
1485                 goto out;
1486
1487         r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
1488                                    passphrase_size_read, &cd->hdr, &vk, cd);
1489         if (r < 0)
1490                 goto out;
1491
1492         keyslot = r;
1493         r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1494         if (r)
1495                 log_err(cd, "Error during resuming device %s.\n", name);
1496 out:
1497         crypt_safe_free(passphrase_read);
1498         crypt_free_volume_key(vk);
1499         return r < 0 ? r : keyslot;
1500 }
1501
1502 int crypt_resume_by_keyfile(struct crypt_device *cd,
1503                             const char *name,
1504                             int keyslot,
1505                             const char *keyfile,
1506                             size_t keyfile_size)
1507 {
1508         return crypt_resume_by_keyfile_offset(cd, name, keyslot,
1509                                               keyfile, keyfile_size, 0);
1510 }
1511
1512 // slot manipulation
1513 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1514         int keyslot, // -1 any
1515         const char *passphrase, // NULL -> terminal
1516         size_t passphrase_size,
1517         const char *new_passphrase, // NULL -> terminal
1518         size_t new_passphrase_size)
1519 {
1520         struct volume_key *vk = NULL;
1521         char *password = NULL, *new_password = NULL;
1522         size_t passwordLen, new_passwordLen;
1523         int r;
1524
1525         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1526                 "new passphrase %sprovided.",
1527                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1528
1529         if (!isLUKS(cd->type)) {
1530                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1531                 return -EINVAL;
1532         }
1533
1534         r = keyslot_verify_or_find_empty(cd, &keyslot);
1535         if (r)
1536                 return r;
1537
1538         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1539                 /* No slots used, try to use pre-generated key in header */
1540                 if (cd->volume_key) {
1541                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1542                         r = vk ? 0 : -ENOMEM;
1543                 } else {
1544                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1545                         return -EINVAL;
1546                 }
1547         } else if (passphrase) {
1548                 /* Passphrase provided, use it to unlock existing keyslot */
1549                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase,
1550                                            passphrase_size, &cd->hdr, &vk, cd);
1551         } else {
1552                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1553                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1554                                       &password, &passwordLen, 0);
1555                 if (r < 0)
1556                         goto out;
1557
1558                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password,
1559                                            passwordLen, &cd->hdr, &vk, cd);
1560                 crypt_safe_free(password);
1561         }
1562
1563         if(r < 0)
1564                 goto out;
1565
1566         if (new_passphrase) {
1567                 new_password = CONST_CAST(char*)new_passphrase;
1568                 new_passwordLen = new_passphrase_size;
1569         } else {
1570                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1571                                       &new_password, &new_passwordLen, 1);
1572                 if(r < 0)
1573                         goto out;
1574         }
1575
1576         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1577                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1578         if(r < 0) goto out;
1579
1580         r = 0;
1581 out:
1582         if (!new_passphrase)
1583                 crypt_safe_free(new_password);
1584         crypt_free_volume_key(vk);
1585         return r ?: keyslot;
1586 }
1587
1588 int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
1589         int keyslot,
1590         const char *keyfile,
1591         size_t keyfile_size,
1592         size_t keyfile_offset,
1593         const char *new_keyfile,
1594         size_t new_keyfile_size,
1595         size_t new_keyfile_offset)
1596 {
1597         struct volume_key *vk = NULL;
1598         char *password = NULL; size_t passwordLen;
1599         char *new_password = NULL; size_t new_passwordLen;
1600         int r;
1601
1602         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1603                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1604
1605         if (!isLUKS(cd->type)) {
1606                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1607                 return -EINVAL;
1608         }
1609
1610         r = keyslot_verify_or_find_empty(cd, &keyslot);
1611         if (r)
1612                 return r;
1613
1614         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1615                 /* No slots used, try to use pre-generated key in header */
1616                 if (cd->volume_key) {
1617                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1618                         r = vk ? 0 : -ENOMEM;
1619                 } else {
1620                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1621                         return -EINVAL;
1622                 }
1623         } else {
1624                 /* Read password from file of (if NULL) from terminal */
1625                 if (keyfile)
1626                         r = key_from_file(cd, _("Enter any passphrase: "),
1627                                           &password, &passwordLen,
1628                                           keyfile, keyfile_offset, keyfile_size);
1629                 else
1630                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1631                                               &password, &passwordLen, 0);
1632                 if (r < 0)
1633                         goto out;
1634
1635                 r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen,
1636                                            &cd->hdr, &vk, cd);
1637         }
1638
1639         if(r < 0)
1640                 goto out;
1641
1642         if (new_keyfile)
1643                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1644                                   &new_password, &new_passwordLen, new_keyfile,
1645                                   new_keyfile_offset, new_keyfile_size);
1646         else
1647                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1648                                       &new_password, &new_passwordLen, 1);
1649         if (r < 0)
1650                 goto out;
1651
1652         r = LUKS_set_key(keyslot, new_password, new_passwordLen,
1653                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1654 out:
1655         crypt_safe_free(password);
1656         crypt_safe_free(new_password);
1657         crypt_free_volume_key(vk);
1658         return r < 0 ? r : keyslot;
1659 }
1660
1661 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1662         int keyslot,
1663         const char *keyfile,
1664         size_t keyfile_size,
1665         const char *new_keyfile,
1666         size_t new_keyfile_size)
1667 {
1668         return crypt_keyslot_add_by_keyfile_offset(cd, keyslot,
1669                                 keyfile, keyfile_size, 0,
1670                                 new_keyfile, new_keyfile_size, 0);
1671 }
1672
1673 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1674         int keyslot,
1675         const char *volume_key,
1676         size_t volume_key_size,
1677         const char *passphrase,
1678         size_t passphrase_size)
1679 {
1680         struct volume_key *vk = NULL;
1681         int r = -EINVAL;
1682         char *new_password = NULL; size_t new_passwordLen;
1683
1684         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1685
1686         if (!isLUKS(cd->type)) {
1687                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1688                 return -EINVAL;
1689         }
1690
1691         if (volume_key)
1692                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1693         else if (cd->volume_key)
1694                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1695
1696         if (!vk)
1697                 return -ENOMEM;
1698
1699         r = LUKS_verify_volume_key(&cd->hdr, vk);
1700         if (r < 0) {
1701                 log_err(cd, _("Volume key does not match the volume.\n"));
1702                 goto out;
1703         }
1704
1705         r = keyslot_verify_or_find_empty(cd, &keyslot);
1706         if (r)
1707                 goto out;
1708
1709         if (!passphrase) {
1710                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1711                                       &new_password, &new_passwordLen, 1);
1712                 if (r < 0)
1713                         goto out;
1714                 passphrase = new_password;
1715                 passphrase_size = new_passwordLen;
1716         }
1717
1718         r = LUKS_set_key(keyslot, passphrase, passphrase_size,
1719                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1720 out:
1721         crypt_safe_free(new_password);
1722         crypt_free_volume_key(vk);
1723         return (r < 0) ? r : keyslot;
1724 }
1725
1726 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1727 {
1728         crypt_keyslot_info ki;
1729
1730         log_dbg("Destroying keyslot %d.", keyslot);
1731
1732         if (!isLUKS(cd->type)) {
1733                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1734                 return -EINVAL;
1735         }
1736
1737         ki = crypt_keyslot_status(cd, keyslot);
1738         if (ki == CRYPT_SLOT_INVALID) {
1739                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1740                 return -EINVAL;
1741         }
1742
1743         if (ki == CRYPT_SLOT_INACTIVE) {
1744                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1745                 return -EINVAL;
1746         }
1747
1748         return LUKS_del_key(keyslot, &cd->hdr, cd);
1749 }
1750
1751 // activation/deactivation of device mapping
1752 int crypt_activate_by_passphrase(struct crypt_device *cd,
1753         const char *name,
1754         int keyslot,
1755         const char *passphrase,
1756         size_t passphrase_size,
1757         uint32_t flags)
1758 {
1759         crypt_status_info ci;
1760         struct volume_key *vk = NULL;
1761         char *read_passphrase = NULL;
1762         size_t passphraseLen = 0;
1763         int r;
1764
1765         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1766                 name ? "Activating" : "Checking", name ?: "",
1767                 keyslot, passphrase ? "" : "[none] ");
1768
1769         if (name) {
1770                 ci = crypt_status(NULL, name);
1771                 if (ci == CRYPT_INVALID)
1772                         return -EINVAL;
1773                 else if (ci >= CRYPT_ACTIVE) {
1774                         log_err(cd, _("Device %s already exists.\n"), name);
1775                         return -EEXIST;
1776                 }
1777         }
1778
1779         /* plain, use hashed passphrase */
1780         if (isPLAIN(cd->type)) {
1781                 if (!name)
1782                         return -EINVAL;
1783
1784                 if (!passphrase) {
1785                         r = key_from_terminal(cd, NULL, &read_passphrase,
1786                                               &passphraseLen, 0);
1787                         if (r < 0)
1788                                 goto out;
1789                         passphrase = read_passphrase;
1790                         passphrase_size = passphraseLen;
1791                 }
1792
1793                 r = process_key(cd, cd->plain_hdr.hash,
1794                                 cd->plain_key_size,
1795                                 passphrase, passphrase_size, &vk);
1796                 if (r < 0)
1797                         goto out;
1798
1799                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1800                 keyslot = 0;
1801         } else if (isLUKS(cd->type)) {
1802                 /* provided passphrase, do not retry */
1803                 if (passphrase) {
1804                         r = LUKS_open_key_with_hdr(keyslot, passphrase,
1805                                                    passphrase_size, &cd->hdr, &vk, cd);
1806                 } else
1807                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1808
1809                 if (r >= 0) {
1810                         keyslot = r;
1811                         if (name)
1812                                 r = LUKS1_activate(cd, name, vk, flags);
1813                 }
1814         } else
1815                 r = -EINVAL;
1816 out:
1817         crypt_safe_free(read_passphrase);
1818         crypt_free_volume_key(vk);
1819
1820         return r < 0  ? r : keyslot;
1821 }
1822
1823 int crypt_activate_by_keyfile_offset(struct crypt_device *cd,
1824         const char *name,
1825         int keyslot,
1826         const char *keyfile,
1827         size_t keyfile_size,
1828         size_t keyfile_offset,
1829         uint32_t flags)
1830 {
1831         crypt_status_info ci;
1832         struct volume_key *vk = NULL;
1833         char *passphrase_read = NULL;
1834         size_t passphrase_size_read;
1835         unsigned int key_count = 0;
1836         int r;
1837
1838         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1839                 name ?: "", keyslot, keyfile ?: "[none]");
1840
1841         if (name) {
1842                 ci = crypt_status(NULL, name);
1843                 if (ci == CRYPT_INVALID)
1844                         return -EINVAL;
1845                 else if (ci >= CRYPT_ACTIVE) {
1846                         log_err(cd, _("Device %s already exists.\n"), name);
1847                         return -EEXIST;
1848                 }
1849         }
1850
1851         if (!keyfile)
1852                 return -EINVAL;
1853
1854         if (isPLAIN(cd->type)) {
1855                 if (!name)
1856                         return -EINVAL;
1857
1858                 r = key_from_file(cd, _("Enter passphrase: "),
1859                                   &passphrase_read, &passphrase_size_read,
1860                                   keyfile, keyfile_offset, keyfile_size);
1861                 if (r < 0)
1862                         goto out;
1863
1864                 r = process_key(cd, cd->plain_hdr.hash,
1865                                 cd->plain_key_size,
1866                                 passphrase_read, passphrase_size_read, &vk);
1867                 if (r < 0)
1868                         goto out;
1869
1870                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1871         } else if (isLUKS(cd->type)) {
1872                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1873                           &passphrase_size_read, keyfile, keyfile_offset, keyfile_size);
1874                 if (r < 0)
1875                         goto out;
1876                 r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
1877                                            passphrase_size_read, &cd->hdr, &vk, cd);
1878                 if (r < 0)
1879                         goto out;
1880                 keyslot = r;
1881
1882                 if (name) {
1883                         r = LUKS1_activate(cd, name, vk, flags);
1884                         if (r < 0)
1885                                 goto out;
1886                 }
1887                 r = keyslot;
1888         } else if (isLOOPAES(cd->type)) {
1889                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
1890                                   keyfile, keyfile_offset, keyfile_size);
1891                 if (r < 0)
1892                         goto out;
1893                 r = LOOPAES_parse_keyfile(cd, &vk, cd->loopaes_hdr.hash, &key_count,
1894                                           passphrase_read, passphrase_size_read);
1895                 if (r < 0)
1896                         goto out;
1897                 if (name)
1898                         r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
1899                                              key_count, vk, flags);
1900         } else
1901                 r = -EINVAL;
1902
1903 out:
1904         crypt_safe_free(passphrase_read);
1905         crypt_free_volume_key(vk);
1906
1907         return r;
1908 }
1909
1910 int crypt_activate_by_keyfile(struct crypt_device *cd,
1911         const char *name,
1912         int keyslot,
1913         const char *keyfile,
1914         size_t keyfile_size,
1915         uint32_t flags)
1916 {
1917         return crypt_activate_by_keyfile_offset(cd, name, keyslot, keyfile,
1918                                                 keyfile_size, 0, flags);
1919 }
1920
1921 int crypt_activate_by_volume_key(struct crypt_device *cd,
1922         const char *name,
1923         const char *volume_key,
1924         size_t volume_key_size,
1925         uint32_t flags)
1926 {
1927         crypt_status_info ci;
1928         struct volume_key *vk = NULL;
1929         int r = -EINVAL;
1930
1931         log_dbg("Activating volume %s by volume key.", name ?: "[none]");
1932
1933         if (name) {
1934                 ci = crypt_status(NULL, name);
1935                 if (ci == CRYPT_INVALID)
1936                         return -EINVAL;
1937                 else if (ci >= CRYPT_ACTIVE) {
1938                         log_err(cd, _("Device %s already exists.\n"), name);
1939                         return -EEXIST;
1940                 }
1941         }
1942
1943         /* use key directly, no hash */
1944         if (isPLAIN(cd->type)) {
1945                 if (!name)
1946                         return -EINVAL;
1947
1948                 if (!volume_key || !volume_key_size || volume_key_size != cd->plain_key_size) {
1949                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
1950                         return -EINVAL;
1951                 }
1952
1953                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1954                 if (!vk)
1955                         return -ENOMEM;
1956
1957                 r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
1958         } else if (isLUKS(cd->type)) {
1959                 /* If key is not provided, try to use internal key */
1960                 if (!volume_key) {
1961                         if (!cd->volume_key) {
1962                                 log_err(cd, _("Volume key does not match the volume.\n"));
1963                                 return -EINVAL;
1964                         }
1965                         volume_key_size = cd->volume_key->keylength;
1966                         volume_key = cd->volume_key->key;
1967                 }
1968
1969                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1970                 if (!vk)
1971                         return -ENOMEM;
1972                 r = LUKS_verify_volume_key(&cd->hdr, vk);
1973
1974                 if (r == -EPERM)
1975                         log_err(cd, _("Volume key does not match the volume.\n"));
1976
1977                 if (!r && name)
1978                         r = LUKS1_activate(cd, name, vk, flags);
1979         } else if (isVERITY(cd->type)) {
1980                 /* volume_key == root hash */
1981                 if (!volume_key || !volume_key_size) {
1982                         log_err(cd, _("Incorrect root hash specified for verity device.\n"));
1983                         return -EINVAL;
1984                 }
1985
1986                 r = VERITY_activate(cd, name, volume_key, volume_key_size,
1987                                     &cd->verity_hdr, CRYPT_ACTIVATE_READONLY);
1988
1989                 if (r == -EPERM) {
1990                         free(cd->verity_root_hash);
1991                         cd->verity_root_hash = NULL;
1992                 } if (!r) {
1993                         cd->verity_root_hash_size = volume_key_size;
1994                         if (!cd->verity_root_hash)
1995                                 cd->verity_root_hash = malloc(volume_key_size);
1996                         if (cd->verity_root_hash)
1997                                 memcpy(cd->verity_root_hash, volume_key, volume_key_size);
1998                 }
1999         } else
2000                 log_err(cd, _("Device type is not properly initialised.\n"));
2001
2002         crypt_free_volume_key(vk);
2003
2004         return r;
2005 }
2006
2007 int crypt_deactivate(struct crypt_device *cd, const char *name)
2008 {
2009         int r;
2010
2011         if (!name)
2012                 return -EINVAL;
2013
2014         log_dbg("Deactivating volume %s.", name);
2015
2016         if (!cd && dm_init(NULL, 1) < 0)
2017                 return -ENOSYS;
2018
2019         switch (crypt_status(cd, name)) {
2020                 case CRYPT_ACTIVE:
2021                 case CRYPT_BUSY:
2022                         r = dm_remove_device(name, 0, 0);
2023                         break;
2024                 case CRYPT_INACTIVE:
2025                         log_err(cd, _("Device %s is not active.\n"), name);
2026                         r = -ENODEV;
2027                         break;
2028                 default:
2029                         log_err(cd, _("Invalid device %s.\n"), name);
2030                         r = -EINVAL;
2031         }
2032
2033         if (!cd)
2034                 dm_exit();
2035
2036         return r;
2037 }
2038
2039 int crypt_volume_key_get(struct crypt_device *cd,
2040         int keyslot,
2041         char *volume_key,
2042         size_t *volume_key_size,
2043         const char *passphrase,
2044         size_t passphrase_size)
2045 {
2046         struct volume_key *vk = NULL;
2047         unsigned key_len;
2048         int r = -EINVAL;
2049
2050         if (crypt_fips_mode()) {
2051                 log_err(cd, "Function not available in FIPS mode.\n");
2052                 return -EACCES;
2053         }
2054
2055         key_len = crypt_get_volume_key_size(cd);
2056         if (key_len > *volume_key_size) {
2057                 log_err(cd, _("Volume key buffer too small.\n"));
2058                 return -ENOMEM;
2059         }
2060
2061         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2062                 r = process_key(cd, cd->plain_hdr.hash, key_len,
2063                                 passphrase, passphrase_size, &vk);
2064                 if (r < 0)
2065                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2066         } else if (isLUKS(cd->type)) {
2067                 r = LUKS_open_key_with_hdr(keyslot, passphrase,
2068                                         passphrase_size, &cd->hdr, &vk, cd);
2069
2070         } else
2071                 log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2072
2073         if (r >= 0) {
2074                 memcpy(volume_key, vk->key, vk->keylength);
2075                 *volume_key_size = vk->keylength;
2076         }
2077
2078         crypt_free_volume_key(vk);
2079         return r;
2080 }
2081
2082 int crypt_volume_key_verify(struct crypt_device *cd,
2083         const char *volume_key,
2084         size_t volume_key_size)
2085 {
2086         struct volume_key *vk;
2087         int r;
2088
2089         if (!isLUKS(cd->type)) {
2090                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2091                 return -EINVAL;
2092         }
2093
2094         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2095         if (!vk)
2096                 return -ENOMEM;
2097
2098         r = LUKS_verify_volume_key(&cd->hdr, vk);
2099
2100         if (r == -EPERM)
2101                 log_err(cd, _("Volume key does not match the volume.\n"));
2102
2103         crypt_free_volume_key(vk);
2104
2105         return r;
2106 }
2107
2108 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2109 {
2110         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2111         cd->timeout = timeout_sec;
2112 }
2113
2114 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2115 {
2116         log_dbg("Password retry count set to %d.", tries);
2117         cd->tries = tries;
2118 }
2119
2120 void crypt_set_iteration_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2121 {
2122         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2123         cd->iteration_time = iteration_time_ms;
2124 }
2125 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2126 {
2127         crypt_set_iteration_time(cd, iteration_time_ms);
2128 }
2129
2130 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2131 {
2132         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2133         cd->password_verify = password_verify ? 1 : 0;
2134 }
2135
2136 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2137 {
2138         switch (rng_type) {
2139         case CRYPT_RNG_URANDOM:
2140         case CRYPT_RNG_RANDOM:
2141                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2142                 cd->rng_type = rng_type;
2143         }
2144 }
2145
2146 int crypt_get_rng_type(struct crypt_device *cd)
2147 {
2148         if (!cd)
2149                 return -EINVAL;
2150
2151         return cd->rng_type;
2152 }
2153
2154 int crypt_memory_lock(struct crypt_device *cd, int lock)
2155 {
2156         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2157 }
2158
2159 // reporting
2160 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2161 {
2162         int r;
2163
2164         if (!cd && dm_init(NULL, 1) < 0)
2165                 return CRYPT_INVALID;
2166
2167         r = dm_status_device(name);
2168
2169         if (!cd)
2170                 dm_exit();
2171
2172         if (r < 0 && r != -ENODEV)
2173                 return CRYPT_INVALID;
2174
2175         if (r == 0)
2176                 return CRYPT_ACTIVE;
2177
2178         if (r > 0)
2179                 return CRYPT_BUSY;
2180
2181         return CRYPT_INACTIVE;
2182 }
2183
2184 static void hexprint(struct crypt_device *cd, const char *d, int n, const char *sep)
2185 {
2186         int i;
2187         for(i = 0; i < n; i++)
2188                 log_std(cd, "%02hhx%s", (const char)d[i], sep);
2189 }
2190
2191 static int _luks_dump(struct crypt_device *cd)
2192 {
2193         int i;
2194
2195         log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(cd));
2196         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2197         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2198         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2199         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2200         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2201         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2202         log_std(cd, "MK digest:     \t");
2203         hexprint(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE, " ");
2204         log_std(cd, "\n");
2205         log_std(cd, "MK salt:       \t");
2206         hexprint(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2, " ");
2207         log_std(cd, "\n               \t");
2208         hexprint(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2209         log_std(cd, "\n");
2210         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2211         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2212         for(i = 0; i < LUKS_NUMKEYS; i++) {
2213                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2214                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2215                         log_std(cd, "\tIterations:         \t%d\n",
2216                                 cd->hdr.keyblock[i].passwordIterations);
2217                         log_std(cd, "\tSalt:               \t");
2218                         hexprint(cd, cd->hdr.keyblock[i].passwordSalt,
2219                                  LUKS_SALTSIZE/2, " ");
2220                         log_std(cd, "\n\t                      \t");
2221                         hexprint(cd, cd->hdr.keyblock[i].passwordSalt +
2222                                  LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
2223                         log_std(cd, "\n");
2224
2225                         log_std(cd, "\tKey material offset:\t%d\n",
2226                                 cd->hdr.keyblock[i].keyMaterialOffset);
2227                         log_std(cd, "\tAF stripes:            \t%d\n",
2228                                 cd->hdr.keyblock[i].stripes);
2229                 }
2230                 else
2231                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2232         }
2233         return 0;
2234 }
2235
2236 static int _verity_dump(struct crypt_device *cd)
2237 {
2238         log_std(cd, "VERITY header information for %s\n", mdata_device_path(cd));
2239         log_std(cd, "UUID:            \t%s\n", cd->verity_uuid ?: "");
2240         log_std(cd, "Hash type:       \t%u\n", cd->verity_hdr.hash_type);
2241         log_std(cd, "Data blocks:     \t%" PRIu64 "\n", cd->verity_hdr.data_size);
2242         log_std(cd, "Data block size: \t%u\n", cd->verity_hdr.data_block_size);
2243         log_std(cd, "Hash block size: \t%u\n", cd->verity_hdr.hash_block_size);
2244         log_std(cd, "Hash algorithm:  \t%s\n", cd->verity_hdr.hash_name);
2245         log_std(cd, "Salt:            \t");
2246         if (cd->verity_hdr.salt_size)
2247                 hexprint(cd, cd->verity_hdr.salt, cd->verity_hdr.salt_size, "");
2248         else
2249                 log_std(cd, "-");
2250         log_std(cd, "\n");
2251         if (cd->verity_root_hash) {
2252                 log_std(cd, "Root hash:      \t");
2253                 hexprint(cd, cd->verity_root_hash, cd->verity_root_hash_size, "");
2254                 log_std(cd, "\n");
2255         }
2256         return 0;
2257 }
2258
2259 int crypt_dump(struct crypt_device *cd)
2260 {
2261         if (isLUKS(cd->type))
2262                 return _luks_dump(cd);
2263         else if (isVERITY(cd->type))
2264                 return _verity_dump(cd);
2265
2266         log_err(cd, _("Dump operation is not supported for this device type.\n"));
2267         return -EINVAL;
2268 }
2269
2270 const char *crypt_get_cipher(struct crypt_device *cd)
2271 {
2272         if (isPLAIN(cd->type))
2273                 return cd->plain_cipher;
2274
2275         if (isLUKS(cd->type))
2276                 return cd->hdr.cipherName;
2277
2278         if (isLOOPAES(cd->type))
2279                 return cd->loopaes_cipher;
2280
2281         return NULL;
2282 }
2283
2284 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2285 {
2286         if (isPLAIN(cd->type))
2287                 return cd->plain_cipher_mode;
2288
2289         if (isLUKS(cd->type))
2290                 return cd->hdr.cipherMode;
2291
2292         if (isLOOPAES(cd->type))
2293                 return cd->loopaes_cipher_mode;
2294
2295         return NULL;
2296 }
2297
2298 const char *crypt_get_uuid(struct crypt_device *cd)
2299 {
2300         if (isLUKS(cd->type))
2301                 return cd->hdr.uuid;
2302
2303         if (isPLAIN(cd->type))
2304                 return cd->plain_uuid;
2305
2306         if (isLOOPAES(cd->type))
2307                 return cd->loopaes_uuid;
2308
2309         if (isVERITY(cd->type))
2310                 return cd->verity_uuid;
2311
2312         return NULL;
2313 }
2314
2315 const char *crypt_get_device_name(struct crypt_device *cd)
2316 {
2317         const char *path = device_block_path(cd->device);
2318
2319         if (!path)
2320                 path = device_path(cd->device);
2321
2322         return path;
2323 }
2324
2325 int crypt_get_volume_key_size(struct crypt_device *cd)
2326 {
2327         if (isPLAIN(cd->type))
2328                 return cd->plain_key_size;
2329
2330         if (isLUKS(cd->type))
2331                 return cd->hdr.keyBytes;
2332
2333         if (isLOOPAES(cd->type))
2334                 return cd->loopaes_key_size;
2335
2336         if (isVERITY(cd->type))
2337                 return cd->verity_root_hash_size;
2338
2339         return 0;
2340 }
2341
2342 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2343 {
2344         if (isPLAIN(cd->type))
2345                 return cd->plain_hdr.offset;
2346
2347         if (isLUKS(cd->type))
2348                 return cd->hdr.payloadOffset;
2349
2350         if (isLOOPAES(cd->type))
2351                 return cd->loopaes_hdr.offset;
2352
2353         return 0;
2354 }
2355
2356 uint64_t crypt_get_iv_offset(struct crypt_device *cd)
2357 {
2358         if (isPLAIN(cd->type))
2359                 return cd->plain_hdr.skip;
2360
2361         if (isLUKS(cd->type))
2362                 return 0;
2363
2364         if (isLOOPAES(cd->type))
2365                 return cd->loopaes_hdr.skip;
2366
2367         return 0;
2368 }
2369
2370 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2371 {
2372         if (!isLUKS(cd->type)) {
2373                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2374                 return CRYPT_SLOT_INVALID;
2375         }
2376
2377         return LUKS_keyslot_info(&cd->hdr, keyslot);
2378 }
2379
2380 int crypt_keyslot_max(const char *type)
2381 {
2382         if (type && isLUKS(type))
2383                 return LUKS_NUMKEYS;
2384
2385         return -EINVAL;
2386 }
2387
2388 const char *crypt_get_type(struct crypt_device *cd)
2389 {
2390         return cd->type;
2391 }
2392
2393 int crypt_get_verity_info(struct crypt_device *cd,
2394         struct crypt_params_verity *vp)
2395 {
2396         if (!isVERITY(cd->type) || !vp)
2397                 return -EINVAL;
2398
2399         vp->data_device = device_path(cd->device);
2400         vp->hash_device = mdata_device_path(cd);
2401         vp->hash_name = cd->verity_hdr.hash_name;
2402         vp->salt = cd->verity_hdr.salt;
2403         vp->salt_size = cd->verity_hdr.salt_size;
2404         vp->data_block_size = cd->verity_hdr.data_block_size;
2405         vp->hash_block_size = cd->verity_hdr.hash_block_size;
2406         vp->data_size = cd->verity_hdr.data_size;
2407         vp->hash_area_offset = cd->verity_hdr.hash_area_offset;
2408         vp->hash_type = cd->verity_hdr.hash_type;
2409         vp->flags = cd->verity_hdr.flags & CRYPT_VERITY_NO_HEADER;
2410         return 0;
2411 }
2412
2413 int crypt_get_active_device(struct crypt_device *cd __attribute__((unused)),
2414                             const char *name,
2415                             struct crypt_active_device *cad)
2416 {
2417         struct crypt_dm_active_device dmd;
2418         int r;
2419
2420         r = dm_query_device(name, 0, &dmd);
2421         if (r < 0)
2422                 return r;
2423
2424         if (dmd.target != DM_CRYPT && dmd.target != DM_VERITY)
2425                 return -ENOTSUP;
2426
2427         cad->offset     = dmd.u.crypt.offset;
2428         cad->iv_offset  = dmd.u.crypt.iv_offset;
2429         cad->size       = dmd.size;
2430         cad->flags      = dmd.flags;
2431
2432         return 0;
2433 }