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) 2009-2011, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "internal.h"
  33 #include "crypto_backend.h"
  34
  35 struct crypt_device {
  36         char *type;
  37
  38         char *device;
  39         char *backing_file;
  40         int loop_fd;
  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
  58         /* used in CRYPT_LOOPAES */
  59         struct crypt_params_loopaes loopaes_hdr;
  60         char *loopaes_cipher;
  61         char *loopaes_cipher_mode;
  62         char *loopaes_uuid;
  63         unsigned int loopaes_key_size;
  64
  65         /* callbacks definitions */
  66         void (*log)(int level, const char *msg, void *usrptr);
  67         void *log_usrptr;
  68         int (*confirm)(const char *msg, void *usrptr);
  69         void *confirm_usrptr;
  70         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  71         void *password_usrptr;
  72 };
  73
  74 /* Log helper */
  75 static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
  76 static int _debug_level = 0;
  77
  78 void crypt_set_debug_level(int level)
  79 {
  80         _debug_level = level;
  81 }
  82
  83 int crypt_get_debug_level()
  84 {
  85         return _debug_level;
  86 }
  87
  88 void crypt_log(struct crypt_device *cd, int level, const char *msg)
  89 {
  90         if (cd && cd->log)
  91                 cd->log(level, msg, cd->log_usrptr);
  92         else if (_default_log)
  93                 _default_log(level, msg, NULL);
  94 }
  95
  96 void logger(struct crypt_device *cd, int level, const char *file,
  97             int line, const char *format, ...)
  98 {
  99         va_list argp;
 100         char *target = NULL;
 101
 102         va_start(argp, format);
 103
 104         if (vasprintf(&target, format, argp) > 0) {
 105                 if (level >= 0) {
 106                         crypt_log(cd, level, target);
 107 #ifdef CRYPT_DEBUG
 108                 } else if (_debug_level)
 109                         printf("# %s:%d %s\n", file ?: "?", line, target);
 110 #else
 111                 } else if (_debug_level)
 112                         printf("# %s\n", target);
 113 #endif
 114         }
 115
 116         va_end(argp);
 117         free(target);
 118 }
 119
 120 static int init_crypto(struct crypt_device *ctx)
 121 {
 122         int r;
 123
 124         r = crypt_random_init(ctx);
 125         if (r < 0) {
 126                 log_err(ctx, _("Cannot initialize crypto RNG backend.\n"));
 127                 return r;
 128         }
 129
 130         r = crypt_backend_init(ctx);
 131         if (r < 0)
 132                 log_err(ctx, _("Cannot initialize crypto backend.\n"));
 133
 134         return r;
 135 }
 136
 137 /*
 138  * Password processing behaviour matrix of process_key
 139  *
 140  * from binary file: check if there is sufficently large key material
 141  * interactive & from fd: hash if requested, otherwise crop or pad with '0'
 142  */
 143 static char *process_key(struct crypt_device *cd, const char *hash_name,
 144                          const char *key_file, size_t key_size,
 145                          const char *pass, size_t passLen)
 146 {
 147         char *key;
 148         int r;
 149
 150         if (!key_size)
 151                 return NULL;
 152
 153         key = crypt_safe_alloc(key_size);
 154         if (!key)
 155                 return NULL;
 156         memset(key, 0, key_size);
 157
 158         /* key is coming from binary file */
 159         if (key_file && strcmp(key_file, "-")) {
 160                 if(passLen < key_size) {
 161                         log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
 162                                 key_size, key_file);
 163                         crypt_safe_free(key);
 164                         return NULL;
 165                 }
 166                 memcpy(key, pass, key_size);
 167                 return key;
 168         }
 169
 170         /* key is coming from tty, fd or binary stdin */
 171         if (hash_name) {
 172                 r = crypt_plain_hash(cd, hash_name, key, key_size, pass, passLen);
 173                 if (r < 0) {
 174                         if (r == -ENOENT)
 175                                 log_err(cd, _("Hash algorithm %s not supported.\n"),
 176                                         hash_name);
 177                         else
 178                                 log_err(cd, _("Key processing error (using hash %s).\n"),
 179                                         hash_name);
 180                         crypt_safe_free(key);
 181                         return NULL;
 182                 }
 183         } else if (passLen > key_size) {
 184                 memcpy(key, pass, key_size);
 185         } else {
 186                 memcpy(key, pass, passLen);
 187         }
 188
 189         return key;
 190 }
 191
 192 static int isPLAIN(const char *type)
 193 {
 194         return (type && !strcmp(CRYPT_PLAIN, type));
 195 }
 196
 197 static int isLUKS(const char *type)
 198 {
 199         return (type && !strcmp(CRYPT_LUKS1, type));
 200 }
 201
 202 static int isLOOPAES(const char *type)
 203 {
 204         return (type && !strcmp(CRYPT_LOOPAES, type));
 205 }
 206
 207 /* keyslot helpers */
 208 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 209 {
 210         if (*keyslot == CRYPT_ANY_SLOT) {
 211                 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
 212                 if (*keyslot < 0) {
 213                         log_err(cd, _("All key slots full.\n"));
 214                         return -EINVAL;
 215                 }
 216         }
 217
 218         switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
 219                 case CRYPT_SLOT_INVALID:
 220                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 221                                 *keyslot, LUKS_NUMKEYS - 1);
 222                         return -EINVAL;
 223                 case CRYPT_SLOT_INACTIVE:
 224                         break;
 225                 default:
 226                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 227                                 *keyslot);
 228                         return -EINVAL;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int verify_other_keyslot(struct crypt_device *cd,
 235                                 const char *key_file,
 236                                 int keyIndex)
 237 {
 238         struct volume_key *vk = NULL;
 239         crypt_keyslot_info ki;
 240         int openedIndex, r;
 241         char *password = NULL;
 242         size_t passwordLen;
 243
 244         r = crypt_get_key(_("Enter any remaining LUKS passphrase: "),
 245                           &password, &passwordLen, 0, key_file, cd->timeout,
 246                           cd->password_verify, cd);
 247         if(r < 0)
 248                 goto out;
 249
 250         ki = crypt_keyslot_status(cd, keyIndex);
 251         if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */
 252                 LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
 253
 254         openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
 255                                              password, passwordLen,
 256                                              &cd->hdr, &vk, cd);
 257
 258         if (ki == CRYPT_SLOT_ACTIVE)
 259                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 260
 261         if (openedIndex < 0)
 262                 r = -EPERM;
 263         else
 264                 log_verbose(cd, _("Key slot %d verified.\n"), openedIndex);
 265 out:
 266         crypt_free_volume_key(vk);
 267         crypt_safe_free(password);
 268         return r;
 269 }
 270
 271 static int find_keyslot_by_passphrase(struct crypt_device *cd,
 272                                       const char *key_file,
 273                                       char *message)
 274 {
 275         struct volume_key *vk = NULL;
 276         char *password = NULL;
 277         size_t passwordLen;
 278         int r;
 279
 280         r = crypt_get_key(message,&password,&passwordLen, 0, key_file,
 281                           cd->timeout, cd->password_verify, cd);
 282         if (r < 0)
 283                 goto out;
 284
 285         r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
 286                                    passwordLen, &cd->hdr, &vk, cd);
 287 out:
 288         crypt_free_volume_key(vk);
 289         crypt_safe_free(password);
 290         return r;
 291 }
 292
 293 static int luks_remove_helper(struct crypt_device *cd,
 294                               int key_slot,
 295                               const char *other_key_file,
 296                               const char *key_file,
 297                               int verify)
 298 {
 299         crypt_keyslot_info ki;
 300         int r = -EINVAL;
 301
 302         if (key_slot == CRYPT_ANY_SLOT) {
 303                 key_slot = find_keyslot_by_passphrase(cd, key_file,
 304                                 _("Enter LUKS passphrase to be deleted: "));
 305                 if(key_slot < 0) {
 306                         r = -EPERM;
 307                         goto out;
 308                 }
 309
 310                 log_std(cd, _("Key slot %d selected for deletion.\n"), key_slot);
 311         }
 312
 313         ki = crypt_keyslot_status(cd, key_slot);
 314         if (ki == CRYPT_SLOT_INVALID) {
 315                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 316                         key_slot, LUKS_NUMKEYS - 1);
 317                 r = -EINVAL;
 318                 goto out;
 319         }
 320         if (ki <= CRYPT_SLOT_INACTIVE) {
 321                 log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
 322                 r = -EINVAL;
 323                 goto out;
 324         }
 325
 326         if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm &&
 327             !(cd->confirm(_("This is the last keyslot."
 328                             " Device will become unusable after purging this key."),
 329                          cd->confirm_usrptr))) {
 330                 r = -EINVAL;
 331                 goto out;
 332         }
 333
 334         if(verify)
 335                 r = verify_other_keyslot(cd, other_key_file, key_slot);
 336         else
 337                 r = 0;
 338
 339         if (!r)
 340                 r = crypt_keyslot_destroy(cd, key_slot);
 341 out:
 342         return (r < 0) ? r : 0;
 343 }
 344
 345 static int create_device_helper(struct crypt_device *cd,
 346                                 const char *name,
 347                                 const char *hash,
 348                                 const char *cipher,
 349                                 const char *cipher_mode,
 350                                 const char *key_file,
 351                                 const char *passphrase,
 352                                 size_t passphrase_size,
 353                                 size_t key_size,
 354                                 uint64_t size,
 355                                 uint64_t skip,
 356                                 uint64_t offset,
 357                                 const char *uuid,
 358                                 int read_only,
 359                                 unsigned int flags,
 360                                 int reload)
 361 {
 362         crypt_status_info ci;
 363         char *dm_cipher = NULL;
 364         char *processed_key = NULL;
 365         int r;
 366
 367         if (!name)
 368                 return -EINVAL;
 369
 370         ci = crypt_status(cd, name);
 371         if (ci == CRYPT_INVALID)
 372                 return -EINVAL;
 373
 374         if (reload && ci < CRYPT_ACTIVE)
 375                 return -EINVAL;
 376
 377         if (!reload && ci >= CRYPT_ACTIVE) {
 378                 log_err(cd, _("Device %s already exists.\n"), name);
 379                 return -EEXIST;
 380         }
 381
 382         if (key_size < 0 || key_size > 1024) {
 383                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 384                 return -EINVAL;
 385         }
 386
 387         r = device_check_and_adjust(cd, cd->device, !reload, &size, &offset, &read_only);
 388         if (r)
 389                 return r;
 390
 391         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 392                 return -ENOMEM;
 393
 394         processed_key = process_key(cd, hash, key_file, key_size, passphrase, passphrase_size);
 395         if (!processed_key) {
 396                 r = -ENOENT;
 397                 goto out;
 398         }
 399
 400         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 401                              key_size, processed_key, read_only, reload);
 402 out:
 403         free(dm_cipher);
 404         crypt_safe_free(processed_key);
 405         return r;
 406 }
 407
 408 static int open_from_hdr_and_vk(struct crypt_device *cd,
 409                                 struct volume_key *vk,
 410                                 const char *name,
 411                                 uint32_t flags)
 412 {
 413         uint64_t size, offset;
 414         char *cipher;
 415         int read_only, no_uuid, r;
 416
 417         size = 0;
 418         offset = crypt_get_data_offset(cd);
 419         read_only = flags & CRYPT_ACTIVATE_READONLY;
 420         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 421
 422         r = device_check_and_adjust(cd, cd->device, 1, &size, &offset, &read_only);
 423         if (r)
 424                 return r;
 425
 426         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 427                      crypt_get_cipher_mode(cd)) < 0)
 428                 r = -ENOMEM;
 429         else
 430                 r = dm_create_device(name, cd->device, cipher, cd->type,
 431                                      no_uuid ? NULL : crypt_get_uuid(cd),
 432                                      size, 0, offset, vk->keylength, vk->key,
 433                                      read_only, 0);
 434         free(cipher);
 435         return r;
 436 }
 437
 438 static void log_wrapper(int level, const char *msg, void *usrptr)
 439 {
 440         void (*xlog)(int level, char *msg) = usrptr;
 441         xlog(level, (char *)msg);
 442 }
 443
 444 static int yesDialog_wrapper(const char *msg, void *usrptr)
 445 {
 446         int (*xyesDialog)(char *msg) = usrptr;
 447         return xyesDialog((char*)msg);
 448 }
 449
 450 int crypt_confirm(struct crypt_device *cd, const char *msg)
 451 {
 452         if (!cd || !cd->confirm)
 453                 return 1;
 454         else
 455                 return cd->confirm(msg, cd->confirm_usrptr);
 456 }
 457
 458 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 459                               size_t *key_len, int force_verify)
 460 {
 461         char *prompt = NULL;
 462         int r;
 463
 464         *key = NULL;
 465         if(!msg && asprintf(&prompt, _("Enter passphrase for %s: "),
 466                             cd->backing_file ?: cd->device) < 0)
 467                 return -ENOMEM;
 468
 469         if (!msg)
 470                 msg = prompt;
 471
 472         if (cd->password) {
 473                 *key = crypt_safe_alloc(DEFAULT_PASSPHRASE_SIZE_MAX);
 474                 if (!*key) {
 475                         r = -ENOMEM;
 476                         goto out;
 477                 }
 478                 r = cd->password(msg, *key, DEFAULT_PASSPHRASE_SIZE_MAX,
 479                                  cd->password_usrptr);
 480                 if (r < 0) {
 481                         crypt_safe_free(*key);
 482                         *key = NULL;
 483                 } else
 484                         *key_len = r;
 485         } else
 486                 r = crypt_get_key(msg, key, key_len, 0, NULL, cd->timeout,
 487                                   (force_verify || cd->password_verify), cd);
 488 out:
 489         free(prompt);
 490         return (r < 0) ? r: 0;
 491 }
 492
 493 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 494                                              struct volume_key **vk)
 495 {
 496         char *passphrase_read = NULL;
 497         size_t passphrase_size_read;
 498         int r = -EINVAL, tries = cd->tries;
 499
 500         *vk = NULL;
 501         do {
 502                 crypt_free_volume_key(*vk);
 503                 *vk = NULL;
 504
 505                 r = key_from_terminal(cd, NULL, &passphrase_read,
 506                                       &passphrase_size_read, 0);
 507                 if(r < 0)
 508                         goto out;
 509
 510                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 511                                            passphrase_size_read, &cd->hdr, vk, cd);
 512                 crypt_safe_free(passphrase_read);
 513                 passphrase_read = NULL;
 514         } while (r == -EPERM && (--tries > 0));
 515 out:
 516         if (r < 0) {
 517                 crypt_free_volume_key(*vk);
 518                 *vk = NULL;
 519         }
 520
 521         crypt_safe_free(passphrase_read);
 522         return r;
 523 }
 524
 525 static int key_from_file(struct crypt_device *cd, char *msg,
 526                           char **key, size_t *key_len,
 527                           const char *key_file, size_t key_size)
 528 {
 529         return crypt_get_key(msg, key, key_len, key_size, key_file,
 530                              cd->timeout, 0, cd);
 531 }
 532
 533 static int _crypt_init(struct crypt_device **cd,
 534                        const char *type,
 535                        struct crypt_options *options,
 536                        int load, int need_dm)
 537 {
 538         int init_by_name, r;
 539
 540         /* if it is plain device and mapping table is being reloaded
 541         initialize it by name*/
 542         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 543
 544         /* Some of old API calls do not require DM in kernel,
 545            fake initialisation by initialise it with kernel_check disabled */
 546         if (!need_dm)
 547                 (void)dm_init(NULL, 0);
 548         if (init_by_name)
 549                 r = crypt_init_by_name(cd, options->name);
 550         else
 551                 r = crypt_init(cd, options->device);
 552         if (!need_dm)
 553                 dm_exit();
 554
 555         if (r)
 556                 return -EINVAL;
 557
 558         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 559         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 560
 561         crypt_set_timeout(*cd, options->timeout);
 562         crypt_set_password_retry(*cd, options->tries);
 563         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 564         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 565
 566         if (load && !init_by_name)
 567                 r = crypt_load(*cd, type, NULL);
 568
 569         if (!r && type && !(*cd)->type) {
 570                 (*cd)->type = strdup(type);
 571                 if (!(*cd)->type)
 572                         r = -ENOMEM;
 573         }
 574
 575         if (r)
 576                 crypt_free(*cd);
 577
 578         return r;
 579 }
 580
 581 void crypt_set_log_callback(struct crypt_device *cd,
 582         void (*log)(int level, const char *msg, void *usrptr),
 583         void *usrptr)
 584 {
 585         if (!cd)
 586                 _default_log = log;
 587         else {
 588                 cd->log = log;
 589                 cd->log_usrptr = usrptr;
 590         }
 591 }
 592
 593 void crypt_set_confirm_callback(struct crypt_device *cd,
 594         int (*confirm)(const char *msg, void *usrptr),
 595         void *usrptr)
 596 {
 597         cd->confirm = confirm;
 598         cd->confirm_usrptr = usrptr;
 599 }
 600
 601 void crypt_set_password_callback(struct crypt_device *cd,
 602         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 603         void *usrptr)
 604 {
 605         cd->password = password;
 606         cd->password_usrptr = usrptr;
 607 }
 608
 609 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 610  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 611  *          flags, icb */
 612 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 613 {
 614         struct crypt_device *cd = NULL;
 615         char *passphrase = NULL;
 616         size_t passphrase_size = 0;
 617         int r;
 618
 619         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 620         if (r)
 621                 return r;
 622
 623         r = crypt_get_key(_("Enter passphrase: "), &passphrase, &passphrase_size,
 624                           options->key_size, options->key_file,
 625                           cd->timeout, cd->password_verify, cd);
 626         if (!r)
 627                 r = create_device_helper(cd, options->name, options->hash,
 628                         options->cipher, NULL, options->key_file,
 629                         passphrase, passphrase_size,
 630                         options->key_size, options->size, options->skip,
 631                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 632                         options->flags, update);
 633
 634         crypt_safe_free(passphrase);
 635         crypt_free(cd);
 636         return r;
 637 }
 638
 639 int crypt_create_device(struct crypt_options *options)
 640 {
 641         return crypt_create_and_update_device(options, 0);
 642 }
 643
 644 int crypt_update_device(struct crypt_options *options)
 645 {
 646         return crypt_create_and_update_device(options, 1);
 647 }
 648
 649 /* OPTIONS: name, size, icb */
 650 int crypt_resize_device(struct crypt_options *options)
 651 {
 652         struct crypt_device *cd = NULL;
 653         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 654         char *type = NULL;
 655         uint64_t size, skip, offset;
 656         int key_size, read_only, r;
 657
 658         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 659
 660         if (dm_init(NULL, 1) < 0)
 661                 return -ENOSYS;
 662
 663         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 664                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 665         if (r < 0) {
 666                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 667                 goto out;
 668         }
 669
 670         /* Try to determine type of device from UUID */
 671         type = CRYPT_PLAIN;
 672         if (uuid) {
 673                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 674                         type = CRYPT_PLAIN;
 675                         free (uuid);
 676                         uuid = NULL;
 677                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 678                         type = CRYPT_LUKS1;
 679         }
 680
 681         if (!options->device)
 682                 options->device = device;
 683
 684         r = _crypt_init(&cd, type, options, 1, 1);
 685         if (r)
 686                 goto out;
 687
 688         size = options->size;
 689         r = device_check_and_adjust(cd, device, 0, &size, &offset, &read_only);
 690         if (r)
 691                 goto out;
 692
 693         r = dm_create_device(options->name, device, cipher, type,
 694                              crypt_get_uuid(cd), size, skip, offset,
 695                              key_size, key, read_only, 1);
 696 out:
 697         crypt_safe_free(key);
 698         free(cipher);
 699         if (options->device == device)
 700                 options->device = NULL;
 701         free(device);
 702         free(uuid);
 703         crypt_free(cd);
 704         dm_exit();
 705         return r;
 706 }
 707
 708 /* OPTIONS: name, icb */
 709 int crypt_query_device(struct crypt_options *options)
 710 {
 711         int read_only, r;
 712
 713         log_dbg("Query device %s.", options->name);
 714
 715         if (dm_init(NULL, 1) < 0)
 716                 return -ENOSYS;
 717
 718         r = dm_status_device(options->name);
 719         if (r < 0)
 720                 goto out;
 721
 722         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 723                             &options->skip, &options->offset, (char **)&options->cipher,
 724                             &options->key_size, NULL, &read_only, NULL, NULL);
 725         if (r >= 0) {
 726                 if (read_only)
 727                         options->flags |= CRYPT_FLAG_READONLY;
 728
 729                 options->flags |= CRYPT_FLAG_FREE_DEVICE;
 730                 options->flags |= CRYPT_FLAG_FREE_CIPHER;
 731
 732                 r = 1;
 733         }
 734 out:
 735         if (r == -ENODEV)
 736                 r = 0;
 737
 738         dm_exit();
 739         return r;
 740 }
 741
 742 /* OPTIONS: name, icb */
 743 int crypt_remove_device(struct crypt_options *options)
 744 {
 745         struct crypt_device *cd = NULL;
 746         int r;
 747
 748         r = crypt_init_by_name(&cd, options->name);
 749         if (r == 0)
 750                 r = crypt_deactivate(cd, options->name);
 751
 752         crypt_free(cd);
 753         return r;
 754
 755 }
 756
 757 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 758  *          new_key_file, iteration_time, timeout, flags, icb */
 759 int crypt_luksFormat(struct crypt_options *options)
 760 {
 761         char cipherName[LUKS_CIPHERNAME_L];
 762         char cipherMode[LUKS_CIPHERMODE_L];
 763         char *password=NULL;
 764         size_t passwordLen;
 765         struct crypt_device *cd = NULL;
 766         struct crypt_params_luks1 cp = {
 767                 .hash = options->hash,
 768                 .data_alignment = options->align_payload
 769         };
 770         int r;
 771
 772         r = crypt_parse_name_and_mode(options->cipher, cipherName, NULL, cipherMode);
 773         if(r < 0) {
 774                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 775                 return r;
 776         }
 777
 778         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 779                 return r;
 780
 781         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 782                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 783                         options->key_slot, LUKS_NUMKEYS - 1);
 784                 r = -EINVAL;
 785                 goto out;
 786         }
 787
 788         r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 789                           options->new_key_file, cd->timeout, cd->password_verify, cd);
 790
 791         if(r < 0)
 792                 goto out;
 793
 794         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 795                          NULL, NULL, options->key_size, &cp);
 796         if (r < 0)
 797                 goto out;
 798
 799         /* Add keyslot using internally stored volume key generated during format */
 800         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 801                                             password, passwordLen);
 802 out:
 803         crypt_free(cd);
 804         crypt_safe_free(password);
 805         return (r < 0) ? r : 0;
 806 }
 807
 808 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 809 int crypt_luksOpen(struct crypt_options *options)
 810 {
 811         struct crypt_device *cd = NULL;
 812         uint32_t flags = 0;
 813         int r;
 814
 815         if (!options->name)
 816                 return -EINVAL;
 817
 818         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 819         if (r)
 820                 return r;
 821
 822         if (options->flags & CRYPT_FLAG_READONLY)
 823                 flags |= CRYPT_ACTIVATE_READONLY;
 824
 825         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 826                 flags |= CRYPT_ACTIVATE_NO_UUID;
 827
 828         if (options->key_file)
 829                 r = crypt_activate_by_keyfile(cd, options->name,
 830                         CRYPT_ANY_SLOT, options->key_file, 0,
 831                         flags);
 832         else
 833                 r = crypt_activate_by_passphrase(cd, options->name,
 834                         CRYPT_ANY_SLOT, options->passphrase,
 835                         options->passphrase ? strlen(options->passphrase) : 0,
 836                         flags);
 837
 838         crypt_free(cd);
 839         return (r < 0) ? r : 0;
 840 }
 841
 842 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 843 int crypt_luksKillSlot(struct crypt_options *options)
 844 {
 845         struct crypt_device *cd = NULL;
 846         int r;
 847
 848         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 849         if (r)
 850                 return r;
 851
 852         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 853                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 854
 855         crypt_free(cd);
 856         return (r < 0) ? r : 0;
 857 }
 858
 859 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 860 int crypt_luksRemoveKey(struct crypt_options *options)
 861 {
 862         struct crypt_device *cd = NULL;
 863         int r;
 864
 865         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 866         if (r)
 867                 return r;
 868
 869         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 870                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 871
 872         crypt_free(cd);
 873         return (r < 0) ? r : 0;
 874 }
 875
 876
 877 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 878             iteration_time, timeout, icb */
 879 int crypt_luksAddKey(struct crypt_options *options)
 880 {
 881         struct crypt_device *cd = NULL;
 882         int r = -EINVAL;
 883
 884         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 885         if (r)
 886                 return r;
 887
 888         if (options->key_file || options->new_key_file)
 889                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 890                                                  options->key_file, 0,
 891                                                  options->new_key_file, 0);
 892         else
 893                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 894                                                     NULL, 0, NULL, 0);
 895
 896         crypt_free(cd);
 897         return (r < 0) ? r : 0;
 898 }
 899
 900 /* OPTIONS: device, icb */
 901 int crypt_luksUUID(struct crypt_options *options)
 902 {
 903         struct crypt_device *cd = NULL;
 904         char *uuid;
 905         int r;
 906
 907         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 908         if (r)
 909                 return r;
 910
 911         uuid = (char *)crypt_get_uuid(cd);
 912         log_std(cd, uuid ?: "");
 913         log_std(cd, "\n");
 914         crypt_free(cd);
 915         return 0;
 916 }
 917
 918 /* OPTIONS: device, icb */
 919 int crypt_isLuks(struct crypt_options *options)
 920 {
 921         struct crypt_device *cd = NULL;
 922         int r;
 923
 924         log_dbg("Check device %s for LUKS header.", options->device);
 925
 926         r = init_crypto(cd);
 927         if (r < 0)
 928                 return r;
 929
 930         r = crypt_init(&cd, options->device);
 931         if (r < 0)
 932                 return -EINVAL;
 933
 934         /* Do print fail here, no need to crypt_load() */
 935         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 936
 937         crypt_free(cd);
 938         return r;
 939 }
 940
 941 /* OPTIONS: device, icb */
 942 int crypt_luksDump(struct crypt_options *options)
 943 {
 944         struct crypt_device *cd = NULL;
 945         int r;
 946
 947         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 948         if(r < 0)
 949                 return r;
 950
 951         r = crypt_dump(cd);
 952
 953         crypt_free(cd);
 954         return r;
 955 }
 956
 957 void crypt_get_error(char *buf, size_t size)
 958 {
 959         const char *error = get_error();
 960
 961         if (!buf || size < 1)
 962                 set_error(NULL);
 963         else if (error) {
 964                 strncpy(buf, error, size - 1);
 965                 buf[size - 1] = '\0';
 966                 set_error(NULL);
 967         } else
 968                 buf[0] = '\0';
 969 }
 970
 971 void crypt_put_options(struct crypt_options *options)
 972 {
 973         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 974                 free((char *)options->device);
 975                 options->device = NULL;
 976                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 977         }
 978         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 979                 free((char *)options->cipher);
 980                 options->cipher = NULL;
 981                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 982         }
 983 }
 984
 985 const char *crypt_get_dir(void)
 986 {
 987         return dm_get_dir();
 988 }
 989
 990 /////////////////////////////////
 991 //
 992 // New API
 993 //
 994
 995 int crypt_init(struct crypt_device **cd, const char *device)
 996 {
 997         struct crypt_device *h = NULL;
 998         int r, readonly = 0;
 999
1000         if (!cd)
1001                 return -EINVAL;
1002
1003         log_dbg("Allocating crypt device %s context.", device);
1004
1005         if (!(h = malloc(sizeof(struct crypt_device))))
1006                 return -ENOMEM;
1007
1008         memset(h, 0, sizeof(*h));
1009         h->loop_fd = -1;
1010
1011         if (device) {
1012                 r = device_ready(NULL, device, O_RDONLY);
1013                 if (r == -ENOTBLK) {
1014                         h->device = crypt_loop_get_device();
1015                         log_dbg("Not a block device, %s%s.",
1016                                 h->device ? "using free loop device " :
1017                                          "no free loop device found",
1018                                 h->device ?: "");
1019                         if (!h->device) {
1020                                 log_err(NULL, _("Cannot find a free loopback device.\n"));
1021                                 r = -ENOSYS;
1022                                 goto bad;
1023                         }
1024
1025                         /* Keep the loop open, dettached on last close. */
1026                         h->loop_fd = crypt_loop_attach(h->device, device, 0, 1, &readonly);
1027                         if (h->loop_fd == -1) {
1028                                 log_err(NULL, _("Attaching loopback device failed "
1029                                         "(loop device with autoclear flag is required).\n"));
1030                                 r = -EINVAL;
1031                                 goto bad;
1032                         }
1033
1034                         h->backing_file = crypt_loop_backing_file(h->device);
1035                         r = device_ready(NULL, h->device, O_RDONLY);
1036                 }
1037                 if (r < 0) {
1038                         r = -ENOTBLK;
1039                         goto bad;
1040                 }
1041         }
1042
1043         if (!h->device && device && !(h->device = strdup(device))) {
1044                 r = -ENOMEM;
1045                 goto bad;
1046         }
1047
1048         if (dm_init(h, 1) < 0) {
1049                 r = -ENOSYS;
1050                 goto bad;
1051         }
1052
1053         h->iteration_time = 1000;
1054         h->password_verify = 0;
1055         h->tries = 3;
1056         h->rng_type = crypt_random_default_key_rng();
1057         *cd = h;
1058         return 0;
1059 bad:
1060
1061         if (h) {
1062                 if (h->loop_fd != -1)
1063                         close(h->loop_fd);
1064                 free(h->device);
1065                 free(h->backing_file);
1066         }
1067         free(h);
1068         return r;
1069 }
1070
1071 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1072 {
1073         crypt_status_info ci;
1074         struct crypt_active_device cad;
1075         char *device = NULL, *cipher_full = NULL, *device_uuid = NULL;
1076         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
1077         char *key = NULL;
1078         int key_size = 0, key_nums, r;
1079
1080
1081         log_dbg("Allocating crypt device context by device %s.", name);
1082
1083         ci = crypt_status(NULL, name);
1084         if (ci == CRYPT_INVALID)
1085                 return -ENODEV;
1086
1087         if (ci < CRYPT_ACTIVE) {
1088                 log_err(NULL, _("Device %s is not active.\n"), name);
1089                 return -ENODEV;
1090         }
1091
1092         r = dm_query_device(name, &device, &cad.size, &cad.iv_offset, &cad.offset,
1093                             &cipher_full, &key_size, &key, NULL, NULL,
1094                             &device_uuid);
1095         if (r < 0)
1096                 goto out;
1097
1098         *cd = NULL;
1099         r = crypt_init(cd, device);
1100
1101         /* Underlying device disappeared but mapping still active */
1102         if (!device || r == -ENOTBLK)
1103                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1104                             name);
1105
1106         /* Underlying device is not readable but crypt mapping exists */
1107         if (r == -ENOTBLK) {
1108                 free(device);
1109                 device = NULL;
1110                 r = crypt_init(cd, NULL);
1111         }
1112
1113         if (r < 0)
1114                 goto out;
1115
1116         /* Try to initialise basic parameters from active device */
1117
1118         if (!(*cd)->backing_file && device && crypt_loop_device(device) &&
1119             !((*cd)->backing_file = crypt_loop_backing_file(device))) {
1120                 r = -ENOMEM;
1121                 goto out;
1122         }
1123
1124         if (device_uuid) {
1125                 if (!strncmp(CRYPT_PLAIN, device_uuid, sizeof(CRYPT_PLAIN)-1)) {
1126                         (*cd)->type = strdup(CRYPT_PLAIN);
1127                         (*cd)->plain_uuid = strdup(device_uuid);
1128                         (*cd)->plain_hdr.hash = NULL; /* no way to get this */
1129                         (*cd)->plain_hdr.offset = cad.offset;
1130                         (*cd)->plain_hdr.skip = cad.iv_offset;
1131                         (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1132                         if (!(*cd)->volume_key) {
1133                                 r = -ENOMEM;
1134                                 goto out;
1135                         }
1136
1137                         r = crypt_parse_name_and_mode(cipher_full, cipher, NULL, cipher_mode);
1138                         if (!r) {
1139                                 (*cd)->plain_cipher = strdup(cipher);
1140                                 (*cd)->plain_cipher_mode = strdup(cipher_mode);
1141                         }
1142                 } else if (!strncmp(CRYPT_LOOPAES, device_uuid, sizeof(CRYPT_LOOPAES)-1)) {
1143                         (*cd)->type = strdup(CRYPT_LOOPAES);
1144                         (*cd)->loopaes_uuid = strdup(device_uuid);
1145                         (*cd)->loopaes_hdr.offset = cad.offset;
1146
1147                         r = crypt_parse_name_and_mode(cipher_full, cipher,
1148                                                       &key_nums, cipher_mode);
1149                         if (!r) {
1150                                 (*cd)->loopaes_cipher = strdup(cipher);
1151                                 (*cd)->loopaes_cipher_mode = strdup(cipher_mode);
1152                                 /* version 3 uses last key for IV */
1153                                 if (key_size % key_nums)
1154                                         key_nums++;
1155                                 (*cd)->loopaes_key_size = key_size / key_nums;
1156                         }
1157                 } else if (!strncmp(CRYPT_LUKS1, device_uuid, sizeof(CRYPT_LUKS1)-1)) {
1158                         if (device) {
1159                                 if (crypt_load(*cd, CRYPT_LUKS1, NULL) < 0 ||
1160                                     crypt_volume_key_verify(*cd, key, key_size) < 0) {
1161                                         log_dbg("LUKS device header does not match active device.");
1162                                         goto out;
1163                                 }
1164
1165                                 (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1166                                 if (!(*cd)->volume_key) {
1167                                         r = -ENOMEM;
1168                                         goto out;
1169                                 }
1170                         }
1171                 }
1172         } else
1173                 log_dbg("Active device has no UUID set, some parameters are not set.");
1174
1175 out:
1176         if (r < 0) {
1177                 crypt_free(*cd);
1178                 *cd = NULL;
1179         }
1180         crypt_safe_free(key);
1181         free(device);
1182         free(cipher_full);
1183         free(device_uuid);
1184         return r;
1185 }
1186
1187 static int _crypt_format_plain(struct crypt_device *cd,
1188                                const char *cipher,
1189                                const char *cipher_mode,
1190                                const char *uuid,
1191                                size_t volume_key_size,
1192                                struct crypt_params_plain *params)
1193 {
1194         if (!cipher || !cipher_mode) {
1195                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1196                 return -EINVAL;
1197         }
1198
1199         if (volume_key_size > 1024) {
1200                 log_err(cd, _("Invalid key size.\n"));
1201                 return -EINVAL;
1202         }
1203
1204         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
1205         if (!cd->volume_key)
1206                 return -ENOMEM;
1207
1208         cd->plain_cipher = strdup(cipher);
1209         cd->plain_cipher_mode = strdup(cipher_mode);
1210
1211         if (uuid)
1212                 cd->plain_uuid = strdup(uuid);
1213
1214         if (params && params->hash)
1215                 cd->plain_hdr.hash = strdup(params->hash);
1216
1217         cd->plain_hdr.offset = params ? params->offset : 0;
1218         cd->plain_hdr.skip = params ? params->skip : 0;
1219
1220         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1221                 return -ENOMEM;
1222
1223         return 0;
1224 }
1225
1226 static int _crypt_format_luks1(struct crypt_device *cd,
1227                                const char *cipher,
1228                                const char *cipher_mode,
1229                                const char *uuid,
1230                                const char *volume_key,
1231                                size_t volume_key_size,
1232                                struct crypt_params_luks1 *params)
1233 {
1234         int r;
1235         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1236         unsigned long alignment_offset = 0;
1237
1238         if (!cd->device) {
1239                 log_err(cd, _("Can't format LUKS without device.\n"));
1240                 return -EINVAL;
1241         }
1242
1243         if (volume_key)
1244                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
1245                                                       volume_key);
1246         else
1247                 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
1248
1249         if(!cd->volume_key)
1250                 return -ENOMEM;
1251
1252         if (params && params->data_alignment)
1253                 required_alignment = params->data_alignment * SECTOR_SIZE;
1254         else
1255                 get_topology_alignment(cd->device, &required_alignment,
1256                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1257
1258         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1259                                (params && params->hash) ? params->hash : "sha1",
1260                                uuid, LUKS_STRIPES,
1261                                required_alignment / SECTOR_SIZE,
1262                                alignment_offset / SECTOR_SIZE,
1263                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1264         if(r < 0)
1265                 return r;
1266
1267         /* Wipe first 8 sectors - fs magic numbers etc. */
1268         r = wipe_device_header(cd->device, 8);
1269         if(r < 0) {
1270                 if (r == -EBUSY)
1271                         log_err(cd, _("Cannot format device %s which is still in use.\n"),
1272                                 cd->device);
1273                 else
1274                         log_err(cd, _("Cannot wipe header on device %s.\n"),
1275                                 cd->device);
1276
1277                 return r;
1278         }
1279
1280         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1281
1282         return r;
1283 }
1284
1285 static int _crypt_format_loopaes(struct crypt_device *cd,
1286                                  const char *cipher,
1287                                  const char *uuid,
1288                                  size_t volume_key_size,
1289                                  struct crypt_params_loopaes *params)
1290 {
1291         if (!cd->device) {
1292                 log_err(cd, _("Can't format LOOPAES without device.\n"));
1293                 return -EINVAL;
1294         }
1295
1296         if (volume_key_size > 1024) {
1297                 log_err(cd, _("Invalid key size.\n"));
1298                 return -EINVAL;
1299         }
1300
1301         cd->loopaes_key_size = volume_key_size;
1302
1303         cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
1304
1305         if (uuid)
1306                 cd->loopaes_uuid = strdup(uuid);
1307
1308         if (params && params->hash)
1309                 cd->loopaes_hdr.hash = strdup(params->hash);
1310
1311         cd->loopaes_hdr.offset = params ? params->offset : 0;
1312         cd->loopaes_hdr.skip = params ? params->skip : 0;
1313
1314         return 0;
1315 }
1316
1317 int crypt_format(struct crypt_device *cd,
1318         const char *type,
1319         const char *cipher,
1320         const char *cipher_mode,
1321         const char *uuid,
1322         const char *volume_key,
1323         size_t volume_key_size,
1324         void *params)
1325 {
1326         int r;
1327
1328         if (!type)
1329                 return -EINVAL;
1330
1331         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", type);
1332
1333         r = init_crypto(cd);
1334         if (r < 0)
1335                 return r;
1336
1337         if (isPLAIN(type))
1338                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1339                                         uuid, volume_key_size, params);
1340         else if (isLUKS(type))
1341                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1342                                         uuid, volume_key, volume_key_size, params);
1343         else if (isLOOPAES(type))
1344                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1345         else {
1346                 /* FIXME: allow plugins here? */
1347                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1348                 r = -EINVAL;
1349         }
1350
1351         if (!r && !(cd->type = strdup(type)))
1352                 r = -ENOMEM;
1353
1354         if (r < 0) {
1355                 crypt_free_volume_key(cd->volume_key);
1356                 cd->volume_key = NULL;
1357         }
1358
1359         return r;
1360 }
1361
1362 int crypt_load(struct crypt_device *cd,
1363                const char *requested_type,
1364                void *params)
1365 {
1366         struct luks_phdr hdr;
1367         int r;
1368
1369         log_dbg("Trying to load %s crypt type from device %s.",
1370                 requested_type ?: "any", cd->device ?: "(none)");
1371
1372         if (!cd->device)
1373                 return -EINVAL;
1374
1375         if (requested_type && !isLUKS(requested_type))
1376                 return -EINVAL;
1377
1378         r = init_crypto(cd);
1379         if (r < 0)
1380                 return r;
1381
1382         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1383
1384         if (!r) {
1385                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1386                 cd->type = strdup(CRYPT_LUKS1);
1387                 if (!cd->type)
1388                         r = -ENOMEM;
1389         }
1390
1391         return r;
1392 }
1393
1394 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1395 {
1396         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
1397         uint64_t size, skip, offset;
1398         int key_size, read_only, r;
1399
1400         /* Device context type must be initialised */
1401         if (!cd->type || !crypt_get_uuid(cd))
1402                 return -EINVAL;
1403
1404         r = dm_query_device(name, &device, &size, &skip, &offset,
1405                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
1406         if (r < 0) {
1407                 log_err(NULL, _("Device %s is not active.\n"), name);
1408                 goto out;
1409         }
1410
1411         if (!uuid) {
1412                 r = -EINVAL;
1413                 goto out;
1414         }
1415
1416         r = device_check_and_adjust(cd, device, 0, &new_size, &offset, &read_only);
1417         if (r)
1418                 goto out;
1419
1420         if (new_size == size) {
1421                 log_dbg("Device has already requested size %" PRIu64
1422                         " sectors.", size);
1423                 r = 0;
1424                 goto out;
1425         }
1426
1427         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1428
1429         r = dm_create_device(name, device, cipher, cd->type,
1430                              crypt_get_uuid(cd), new_size, skip, offset,
1431                              key_size, key, read_only, 1);
1432 out:
1433         crypt_safe_free(key);
1434         free(cipher);
1435         free(device);
1436         free(uuid);
1437
1438         return r;
1439 }
1440
1441 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1442 {
1443         if (!isLUKS(cd->type)) {
1444                 log_err(cd, _("This operation is not supported for this device type.\n"));
1445                 return  -EINVAL;
1446         }
1447
1448         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1449                 log_dbg("UUID is the same as requested (%s) for device %s.",
1450                         uuid, cd->device);
1451                 return 0;
1452         }
1453
1454         if (uuid)
1455                 log_dbg("Requested new UUID change to %s for %s.", uuid, cd->device);
1456         else
1457                 log_dbg("Requested new UUID refresh for %s.", cd->device);
1458
1459         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1460                 return -EPERM;
1461
1462         return LUKS_hdr_uuid_set(cd->device, &cd->hdr, uuid, cd);
1463 }
1464
1465 int crypt_header_backup(struct crypt_device *cd,
1466                         const char *requested_type,
1467                         const char *backup_file)
1468 {
1469         int r;
1470
1471         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1472                 return -EINVAL;
1473
1474         r = init_crypto(cd);
1475         if (r < 0)
1476                 return r;
1477
1478         log_dbg("Requested header backup of device %s (%s) to "
1479                 "file %s.", cd->device, requested_type, backup_file);
1480
1481         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1482 }
1483
1484 int crypt_header_restore(struct crypt_device *cd,
1485                          const char *requested_type,
1486                          const char *backup_file)
1487 {
1488         int r;
1489
1490         if (requested_type && !isLUKS(requested_type))
1491                 return -EINVAL;
1492
1493         /* Some hash functions need initialized gcrypt library */
1494         r = init_crypto(cd);
1495         if (r < 0)
1496                 return r;
1497
1498         log_dbg("Requested header restore to device %s (%s) from "
1499                 "file %s.", cd->device, requested_type, backup_file);
1500
1501         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1502 }
1503
1504 void crypt_free(struct crypt_device *cd)
1505 {
1506         if (cd) {
1507                 log_dbg("Releasing crypt device %s context.", cd->device);
1508
1509                 if (cd->loop_fd != -1)
1510                         close(cd->loop_fd);
1511
1512                 dm_exit();
1513                 crypt_free_volume_key(cd->volume_key);
1514
1515                 free(cd->device);
1516                 free(cd->backing_file);
1517                 free(cd->type);
1518
1519                 /* used in plain device only */
1520                 free((char*)cd->plain_hdr.hash);
1521                 free(cd->plain_cipher);
1522                 free(cd->plain_cipher_mode);
1523                 free(cd->plain_uuid);
1524
1525                 free(cd);
1526         }
1527 }
1528
1529 int crypt_suspend(struct crypt_device *cd,
1530                   const char *name)
1531 {
1532         crypt_status_info ci;
1533         int r, suspended = 0;
1534
1535         log_dbg("Suspending volume %s.", name);
1536
1537         ci = crypt_status(NULL, name);
1538         if (ci < CRYPT_ACTIVE) {
1539                 log_err(cd, _("Volume %s is not active.\n"), name);
1540                 return -EINVAL;
1541         }
1542
1543         if (!cd && dm_init(NULL, 1) < 0)
1544                 return -ENOSYS;
1545
1546         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1547                             NULL, NULL, NULL, NULL, &suspended, NULL);
1548         if (r < 0)
1549                 goto out;
1550
1551         if (suspended) {
1552                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1553                 r = -EINVAL;
1554                 goto out;
1555         }
1556
1557         r = dm_suspend_and_wipe_key(name);
1558         if (r == -ENOTSUP)
1559                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1560         else if (r)
1561                 log_err(cd, "Error during suspending device %s.\n", name);
1562 out:
1563         if (!cd)
1564                 dm_exit();
1565         return r;
1566 }
1567
1568 int crypt_resume_by_passphrase(struct crypt_device *cd,
1569                                const char *name,
1570                                int keyslot,
1571                                const char *passphrase,
1572                                size_t passphrase_size)
1573 {
1574         struct volume_key *vk = NULL;
1575         int r, suspended = 0;
1576
1577         log_dbg("Resuming volume %s.", name);
1578
1579         if (!isLUKS(cd->type)) {
1580                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1581                 r = -EINVAL;
1582                 goto out;
1583         }
1584
1585         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1586                             NULL, NULL, NULL, NULL, &suspended, NULL);
1587         if (r < 0)
1588                 return r;
1589
1590         if (!suspended) {
1591                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1592                 return -EINVAL;
1593         }
1594
1595         if (passphrase) {
1596                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1597                                            passphrase_size, &cd->hdr, &vk, cd);
1598         } else
1599                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1600
1601         if (r >= 0) {
1602                 keyslot = r;
1603                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1604                 if (r == -ENOTSUP)
1605                         log_err(cd, "Resume is not supported for device %s.\n", name);
1606                 else if (r)
1607                         log_err(cd, "Error during resuming device %s.\n", name);
1608         } else
1609                 r = keyslot;
1610 out:
1611         crypt_free_volume_key(vk);
1612         return r < 0 ? r : keyslot;
1613 }
1614
1615 int crypt_resume_by_keyfile(struct crypt_device *cd,
1616                             const char *name,
1617                             int keyslot,
1618                             const char *keyfile,
1619                             size_t keyfile_size)
1620 {
1621         struct volume_key *vk = NULL;
1622         char *passphrase_read = NULL;
1623         size_t passphrase_size_read;
1624         int r, suspended = 0;
1625
1626         log_dbg("Resuming volume %s.", name);
1627
1628         if (!isLUKS(cd->type)) {
1629                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1630                 r = -EINVAL;
1631                 goto out;
1632         }
1633
1634         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1635                             NULL, NULL, NULL, NULL, &suspended, NULL);
1636         if (r < 0)
1637                 return r;
1638
1639         if (!suspended) {
1640                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1641                 return -EINVAL;
1642         }
1643
1644         if (!keyfile)
1645                 return -EINVAL;
1646
1647         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1648                           &passphrase_size_read, keyfile, keyfile_size);
1649         if (r < 0)
1650                 goto out;
1651
1652         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1653                                    passphrase_size_read, &cd->hdr, &vk, cd);
1654         if (r < 0)
1655                 goto out;
1656
1657         keyslot = r;
1658         r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1659         if (r)
1660                 log_err(cd, "Error during resuming device %s.\n", name);
1661 out:
1662         crypt_safe_free(passphrase_read);
1663         crypt_free_volume_key(vk);
1664         return r < 0 ? r : keyslot;
1665 }
1666
1667 // slot manipulation
1668 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1669         int keyslot, // -1 any
1670         const char *passphrase, // NULL -> terminal
1671         size_t passphrase_size,
1672         const char *new_passphrase, // NULL -> terminal
1673         size_t new_passphrase_size)
1674 {
1675         struct volume_key *vk = NULL;
1676         char *password = NULL, *new_password = NULL;
1677         size_t passwordLen, new_passwordLen;
1678         int r;
1679
1680         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1681                 "new passphrase %sprovided.",
1682                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1683
1684         if (!isLUKS(cd->type)) {
1685                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1686                 return -EINVAL;
1687         }
1688
1689         r = keyslot_verify_or_find_empty(cd, &keyslot);
1690         if (r)
1691                 return r;
1692
1693         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1694                 /* No slots used, try to use pre-generated key in header */
1695                 if (cd->volume_key) {
1696                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1697                         r = vk ? 0 : -ENOMEM;
1698                 } else {
1699                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1700                         return -EINVAL;
1701                 }
1702         } else if (passphrase) {
1703                 /* Passphrase provided, use it to unlock existing keyslot */
1704                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1705                                            passphrase_size, &cd->hdr, &vk, cd);
1706         } else {
1707                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1708                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1709                                       &password, &passwordLen, 0);
1710                 if (r < 0)
1711                         goto out;
1712
1713                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1714                                            passwordLen, &cd->hdr, &vk, cd);
1715                 crypt_safe_free(password);
1716         }
1717
1718         if(r < 0)
1719                 goto out;
1720
1721         if (new_passphrase) {
1722                 new_password = (char *)new_passphrase;
1723                 new_passwordLen = new_passphrase_size;
1724         } else {
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         }
1730
1731         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1732                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1733         if(r < 0) goto out;
1734
1735         r = 0;
1736 out:
1737         if (!new_passphrase)
1738                 crypt_safe_free(new_password);
1739         crypt_free_volume_key(vk);
1740         return r ?: keyslot;
1741 }
1742
1743 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1744         int keyslot,
1745         const char *keyfile,
1746         size_t keyfile_size,
1747         const char *new_keyfile,
1748         size_t new_keyfile_size)
1749 {
1750         struct volume_key *vk = NULL;
1751         char *password = NULL; size_t passwordLen;
1752         char *new_password = NULL; size_t new_passwordLen;
1753         int r;
1754
1755         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1756                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1757
1758         if (!isLUKS(cd->type)) {
1759                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1760                 return -EINVAL;
1761         }
1762
1763         r = keyslot_verify_or_find_empty(cd, &keyslot);
1764         if (r)
1765                 return r;
1766
1767         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1768                 /* No slots used, try to use pre-generated key in header */
1769                 if (cd->volume_key) {
1770                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1771                         r = vk ? 0 : -ENOMEM;
1772                 } else {
1773                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1774                         return -EINVAL;
1775                 }
1776         } else {
1777                 /* Read password from file of (if NULL) from terminal */
1778                 if (keyfile)
1779                         r = key_from_file(cd, _("Enter any passphrase: "),
1780                                           &password, &passwordLen,
1781                                           keyfile, keyfile_size);
1782                 else
1783                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1784                                               &password, &passwordLen, 0);
1785                 if (r < 0)
1786                         goto out;
1787
1788                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1789                                            &cd->hdr, &vk, cd);
1790         }
1791
1792         if(r < 0)
1793                 goto out;
1794
1795         if (new_keyfile)
1796                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1797                                   &new_password, &new_passwordLen, new_keyfile,
1798                                   new_keyfile_size);
1799         else
1800                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1801                                       &new_password, &new_passwordLen, 1);
1802         if (r < 0)
1803                 goto out;
1804
1805         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1806                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1807 out:
1808         crypt_safe_free(password);
1809         crypt_safe_free(new_password);
1810         crypt_free_volume_key(vk);
1811         return r < 0 ? r : keyslot;
1812 }
1813
1814 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1815         int keyslot,
1816         const char *volume_key,
1817         size_t volume_key_size,
1818         const char *passphrase,
1819         size_t passphrase_size)
1820 {
1821         struct volume_key *vk = NULL;
1822         int r = -EINVAL;
1823         char *new_password = NULL; size_t new_passwordLen;
1824
1825         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1826
1827         if (!isLUKS(cd->type)) {
1828                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1829                 return -EINVAL;
1830         }
1831
1832         if (volume_key)
1833                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1834         else if (cd->volume_key)
1835                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1836
1837         if (!vk)
1838                 return -ENOMEM;
1839
1840         r = LUKS_verify_volume_key(&cd->hdr, vk);
1841         if (r < 0) {
1842                 log_err(cd, _("Volume key does not match the volume.\n"));
1843                 goto out;
1844         }
1845
1846         r = keyslot_verify_or_find_empty(cd, &keyslot);
1847         if (r)
1848                 goto out;
1849
1850         if (!passphrase) {
1851                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1852                                       &new_password, &new_passwordLen, 1);
1853                 if (r < 0)
1854                         goto out;
1855                 passphrase = new_password;
1856                 passphrase_size = new_passwordLen;
1857         }
1858
1859         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1860                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1861 out:
1862         crypt_safe_free(new_password);
1863         crypt_free_volume_key(vk);
1864         return (r < 0) ? r : keyslot;
1865 }
1866
1867 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1868 {
1869         crypt_keyslot_info ki;
1870
1871         log_dbg("Destroying keyslot %d.", keyslot);
1872
1873         if (!isLUKS(cd->type)) {
1874                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1875                 return -EINVAL;
1876         }
1877
1878         ki = crypt_keyslot_status(cd, keyslot);
1879         if (ki == CRYPT_SLOT_INVALID) {
1880                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1881                 return -EINVAL;
1882         }
1883
1884         if (ki == CRYPT_SLOT_INACTIVE) {
1885                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1886                 return -EINVAL;
1887         }
1888
1889         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1890 }
1891
1892 // activation/deactivation of device mapping
1893 int crypt_activate_by_passphrase(struct crypt_device *cd,
1894         const char *name,
1895         int keyslot,
1896         const char *passphrase,
1897         size_t passphrase_size,
1898         uint32_t flags)
1899 {
1900         crypt_status_info ci;
1901         struct volume_key *vk = NULL;
1902         char *read_passphrase = NULL;
1903         size_t passphraseLen = 0;
1904         int r;
1905
1906         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1907                 name ? "Activating" : "Checking", name ?: "",
1908                 keyslot, passphrase ? "" : "[none] ");
1909
1910         if (name) {
1911                 ci = crypt_status(NULL, name);
1912                 if (ci == CRYPT_INVALID)
1913                         return -EINVAL;
1914                 else if (ci >= CRYPT_ACTIVE) {
1915                         log_err(cd, _("Device %s already exists.\n"), name);
1916                         return -EEXIST;
1917                 }
1918         }
1919
1920         /* plain, use hashed passphrase */
1921         if (isPLAIN(cd->type)) {
1922                 if (!passphrase) {
1923                         r = key_from_terminal(cd, NULL, &read_passphrase,
1924                                               &passphraseLen, 0);
1925                         if (r < 0)
1926                                 goto out;
1927                         passphrase = read_passphrase;
1928                         passphrase_size = passphraseLen;
1929                 }
1930                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1931                                          cd->plain_cipher, cd->plain_cipher_mode,
1932                                          NULL, passphrase, passphrase_size,
1933                                          cd->volume_key->keylength, 0,
1934                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
1935                                          cd->plain_uuid,
1936                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1937                 keyslot = 0;
1938         } else if (isLUKS(cd->type)) {
1939                 /* provided passphrase, do not retry */
1940                 if (passphrase) {
1941                         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1942                                                    passphrase_size, &cd->hdr, &vk, cd);
1943                 } else
1944                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1945
1946                 if (r >= 0) {
1947                         keyslot = r;
1948                         if (name)
1949                                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1950                 }
1951         } else
1952                 r = -EINVAL;
1953 out:
1954         crypt_safe_free(read_passphrase);
1955         crypt_free_volume_key(vk);
1956
1957         return r < 0  ? r : keyslot;
1958 }
1959
1960 int crypt_activate_by_keyfile(struct crypt_device *cd,
1961         const char *name,
1962         int keyslot,
1963         const char *keyfile,
1964         size_t keyfile_size,
1965         uint32_t flags)
1966 {
1967         crypt_status_info ci;
1968         struct volume_key *vk = NULL;
1969         char *passphrase_read = NULL;
1970         size_t passphrase_size_read;
1971         unsigned int key_count = 0;
1972         int r;
1973
1974         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1975                 name ?: "", keyslot, keyfile ?: "[none]");
1976
1977         if (name) {
1978                 ci = crypt_status(NULL, name);
1979                 if (ci == CRYPT_INVALID)
1980                         return -EINVAL;
1981                 else if (ci >= CRYPT_ACTIVE) {
1982                         log_err(cd, _("Device %s already exists.\n"), name);
1983                         return -EEXIST;
1984                 }
1985         }
1986
1987         if (!keyfile)
1988                 return -EINVAL;
1989
1990         if (isPLAIN(cd->type)) {
1991                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1992                                   &passphrase_size_read, keyfile, keyfile_size);
1993                 if (r < 0)
1994                         goto out;
1995                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1996                                          cd->plain_cipher, cd->plain_cipher_mode,
1997                                          NULL, passphrase_read, passphrase_size_read,
1998                                          cd->volume_key->keylength, 0,
1999                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
2000                                          cd->plain_uuid,
2001                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
2002         } else if (isLUKS(cd->type)) {
2003                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
2004                           &passphrase_size_read, keyfile, keyfile_size);
2005                 if (r < 0)
2006                         goto out;
2007                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
2008                                            passphrase_size_read, &cd->hdr, &vk, cd);
2009                 if (r < 0)
2010                         goto out;
2011                 keyslot = r;
2012
2013                 if (name) {
2014                         r = open_from_hdr_and_vk(cd, vk, name, flags);
2015                         if (r < 0)
2016                                 goto out;
2017                 }
2018                 r = keyslot;
2019         } else if (isLOOPAES(cd->type)) {
2020                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
2021                                   keyfile, keyfile_size);
2022                 if (r < 0)
2023                         goto out;
2024                 r = LOOPAES_parse_keyfile(cd, &vk, &key_count,
2025                                           passphrase_read, passphrase_size_read);
2026                 if (r < 0)
2027                         goto out;
2028                 if (name)
2029                         r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
2030                                              key_count, vk,
2031                                              cd->loopaes_hdr.offset,
2032                                              cd->loopaes_hdr.skip,
2033                                              flags);
2034         } else
2035                 r = -EINVAL;
2036
2037 out:
2038         crypt_safe_free(passphrase_read);
2039         crypt_free_volume_key(vk);
2040
2041         return r;
2042 }
2043
2044 int crypt_activate_by_volume_key(struct crypt_device *cd,
2045         const char *name,
2046         const char *volume_key,
2047         size_t volume_key_size,
2048         uint32_t flags)
2049 {
2050         crypt_status_info ci;
2051         struct volume_key *vk;
2052         int r;
2053
2054         log_dbg("Activating volume %s by volume key.", name);
2055
2056         /* use key directly, no hash */
2057         if (isPLAIN(cd->type)) {
2058                 if (!volume_key || !volume_key_size || !cd->volume_key ||
2059                         volume_key_size != cd->volume_key->keylength) {
2060                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
2061                         return -EINVAL;
2062                 }
2063
2064                 return create_device_helper(cd, name, NULL,
2065                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
2066                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
2067                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
2068         }
2069
2070         if (!isLUKS(cd->type)) {
2071                 log_err(cd, _("Device type is not properly initialised.\n"));
2072                 return -EINVAL;
2073         }
2074
2075         if (name) {
2076                 ci = crypt_status(NULL, name);
2077                 if (ci == CRYPT_INVALID)
2078                         return -EINVAL;
2079                 else if (ci >= CRYPT_ACTIVE) {
2080                         log_err(cd, _("Device %s already exists.\n"), name);
2081                         return -EEXIST;
2082                 }
2083         }
2084
2085         /* If key is not provided, try to use internal key */
2086         if (!volume_key) {
2087                 if (!cd->volume_key) {
2088                         log_err(cd, _("Volume key does not match the volume.\n"));
2089                         return -EINVAL;
2090                 }
2091                 volume_key_size = cd->volume_key->keylength;
2092                 volume_key = cd->volume_key->key;
2093         }
2094
2095         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2096         if (!vk)
2097                 return -ENOMEM;
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         if (!r && name)
2104                 r = open_from_hdr_and_vk(cd, vk, name, flags);
2105
2106         crypt_free_volume_key(vk);
2107
2108         return r;
2109 }
2110
2111 int crypt_deactivate(struct crypt_device *cd, const char *name)
2112 {
2113         int r;
2114
2115         if (!name)
2116                 return -EINVAL;
2117
2118         log_dbg("Deactivating volume %s.", name);
2119
2120         if (!cd && dm_init(NULL, 1) < 0)
2121                 return -ENOSYS;
2122
2123         switch (crypt_status(cd, name)) {
2124                 case CRYPT_ACTIVE:
2125                         r = dm_remove_device(name, 0, 0);
2126                         break;
2127                 case CRYPT_BUSY:
2128                         log_err(cd, _("Device %s is busy.\n"), name);
2129                         r = -EBUSY;
2130                         break;
2131                 case CRYPT_INACTIVE:
2132                         log_err(cd, _("Device %s is not active.\n"), name);
2133                         r = -ENODEV;
2134                         break;
2135                 default:
2136                         log_err(cd, _("Invalid device %s.\n"), name);
2137                         r = -EINVAL;
2138         }
2139
2140         if (!cd)
2141                 dm_exit();
2142
2143         return r;
2144 }
2145
2146 int crypt_volume_key_get(struct crypt_device *cd,
2147         int keyslot,
2148         char *volume_key,
2149         size_t *volume_key_size,
2150         const char *passphrase,
2151         size_t passphrase_size)
2152 {
2153         struct volume_key *vk;
2154         char *processed_key = NULL;
2155         int r, key_len;
2156
2157         key_len = crypt_get_volume_key_size(cd);
2158         if (key_len > *volume_key_size) {
2159                 log_err(cd, _("Volume key buffer too small.\n"));
2160                 return -ENOMEM;
2161         }
2162
2163         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2164                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
2165                                             passphrase, passphrase_size);
2166                 if (!processed_key) {
2167                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2168                         return -EINVAL;
2169                 }
2170                 memcpy(volume_key, processed_key, key_len);
2171                 *volume_key_size = key_len;
2172                 crypt_safe_free(processed_key);
2173                 return 0;
2174         }
2175
2176         if (isLUKS(cd->type)) {
2177                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
2178                                         passphrase_size, &cd->hdr, &vk, cd);
2179
2180                 if (r >= 0) {
2181                         memcpy(volume_key, vk->key, vk->keylength);
2182                         *volume_key_size = vk->keylength;
2183                 }
2184
2185                 crypt_free_volume_key(vk);
2186                 return r;
2187         }
2188
2189         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2190         return -EINVAL;
2191 }
2192
2193 int crypt_volume_key_verify(struct crypt_device *cd,
2194         const char *volume_key,
2195         size_t volume_key_size)
2196 {
2197         struct volume_key *vk;
2198         int r;
2199
2200         if (!isLUKS(cd->type)) {
2201                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2202                 return -EINVAL;
2203         }
2204
2205         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2206         if (!vk)
2207                 return -ENOMEM;
2208
2209         r = LUKS_verify_volume_key(&cd->hdr, vk);
2210
2211         if (r == -EPERM)
2212                 log_err(cd, _("Volume key does not match the volume.\n"));
2213
2214         crypt_free_volume_key(vk);
2215
2216         return r;
2217 }
2218
2219 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2220 {
2221         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2222         cd->timeout = timeout_sec;
2223 }
2224
2225 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2226 {
2227         log_dbg("Password retry count set to %d.", tries);
2228         cd->tries = tries;
2229 }
2230
2231 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2232 {
2233         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2234         cd->iteration_time = iteration_time_ms;
2235 }
2236
2237 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2238 {
2239         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2240         cd->password_verify = password_verify ? 1 : 0;
2241 }
2242
2243 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2244 {
2245         switch (rng_type) {
2246         case CRYPT_RNG_URANDOM:
2247         case CRYPT_RNG_RANDOM:
2248                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2249                 cd->rng_type = rng_type;
2250         }
2251 }
2252
2253 int crypt_get_rng_type(struct crypt_device *cd)
2254 {
2255         if (!cd)
2256                 return -EINVAL;
2257
2258         return cd->rng_type;
2259 }
2260
2261 int crypt_memory_lock(struct crypt_device *cd, int lock)
2262 {
2263         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2264 }
2265
2266 // reporting
2267 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2268 {
2269         int r;
2270
2271         if (!cd && dm_init(NULL, 1) < 0)
2272                 return CRYPT_INVALID;
2273
2274         r = dm_status_device(name);
2275
2276         if (!cd)
2277                 dm_exit();
2278
2279         if (r < 0 && r != -ENODEV)
2280                 return CRYPT_INVALID;
2281
2282         if (r == 0)
2283                 return CRYPT_ACTIVE;
2284
2285         if (r > 0)
2286                 return CRYPT_BUSY;
2287
2288         return CRYPT_INACTIVE;
2289 }
2290
2291 static void hexprintICB(struct crypt_device *cd, char *d, int n)
2292 {
2293         int i;
2294         for(i = 0; i < n; i++)
2295                 log_std(cd, "%02hhx ", (char)d[i]);
2296 }
2297
2298 int crypt_dump(struct crypt_device *cd)
2299 {
2300         int i;
2301         if (!isLUKS(cd->type)) { //FIXME
2302                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2303                 return -EINVAL;
2304         }
2305
2306         log_std(cd, "LUKS header information for %s\n\n", cd->device);
2307         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2308         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2309         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2310         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2311         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2312         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2313         log_std(cd, "MK digest:     \t");
2314         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
2315         log_std(cd, "\n");
2316         log_std(cd, "MK salt:       \t");
2317         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
2318         log_std(cd, "\n               \t");
2319         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2320         log_std(cd, "\n");
2321         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2322         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2323         for(i = 0; i < LUKS_NUMKEYS; i++) {
2324                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2325                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2326                         log_std(cd, "\tIterations:         \t%d\n",
2327                                 cd->hdr.keyblock[i].passwordIterations);
2328                         log_std(cd, "\tSalt:               \t");
2329                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2330                                     LUKS_SALTSIZE/2);
2331                         log_std(cd, "\n\t                      \t");
2332                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2333                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2334                         log_std(cd, "\n");
2335
2336                         log_std(cd, "\tKey material offset:\t%d\n",
2337                                 cd->hdr.keyblock[i].keyMaterialOffset);
2338                         log_std(cd, "\tAF stripes:            \t%d\n",
2339                                 cd->hdr.keyblock[i].stripes);
2340                 }
2341                 else
2342                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2343         }
2344
2345         return 0;
2346 }
2347
2348 const char *crypt_get_cipher(struct crypt_device *cd)
2349 {
2350         if (isPLAIN(cd->type))
2351                 return cd->plain_cipher;
2352
2353         if (isLUKS(cd->type))
2354                 return cd->hdr.cipherName;
2355
2356         if (isLOOPAES(cd->type))
2357                 return cd->loopaes_cipher;
2358
2359         return NULL;
2360 }
2361
2362 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2363 {
2364         if (isPLAIN(cd->type))
2365                 return cd->plain_cipher_mode;
2366
2367         if (isLUKS(cd->type))
2368                 return cd->hdr.cipherMode;
2369
2370         if (isLOOPAES(cd->type))
2371                 return cd->loopaes_cipher_mode;
2372
2373         return NULL;
2374 }
2375
2376 const char *crypt_get_uuid(struct crypt_device *cd)
2377 {
2378         if (isLUKS(cd->type))
2379                 return cd->hdr.uuid;
2380
2381         if (isPLAIN(cd->type))
2382                 return cd->plain_uuid;
2383
2384         if (isLOOPAES(cd->type))
2385                 return cd->loopaes_uuid;
2386
2387         return NULL;
2388 }
2389
2390 const char *crypt_get_device_name(struct crypt_device *cd)
2391 {
2392         return cd->device;
2393 }
2394
2395 int crypt_get_volume_key_size(struct crypt_device *cd)
2396 {
2397         if (isPLAIN(cd->type) && cd->volume_key)
2398                 return cd->volume_key->keylength;
2399
2400         if (isLUKS(cd->type))
2401                 return cd->hdr.keyBytes;
2402
2403         if (isLOOPAES(cd->type))
2404                 return cd->loopaes_key_size;
2405
2406         return 0;
2407 }
2408
2409 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2410 {
2411         if (isPLAIN(cd->type))
2412                 return cd->plain_hdr.offset;
2413
2414         if (isLUKS(cd->type))
2415                 return cd->hdr.payloadOffset;
2416
2417         if (isLOOPAES(cd->type))
2418                 return cd->loopaes_hdr.offset;
2419
2420         return 0;
2421 }
2422
2423 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2424 {
2425         if (!isLUKS(cd->type)) {
2426                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2427                 return CRYPT_SLOT_INVALID;
2428         }
2429
2430         return LUKS_keyslot_info(&cd->hdr, keyslot);
2431 }
2432
2433 int crypt_keyslot_max(const char *type)
2434 {
2435         if (type && isLUKS(type))
2436                 return LUKS_NUMKEYS;
2437
2438         return -EINVAL;
2439 }
2440
2441 const char *crypt_get_type(struct crypt_device *cd)
2442 {
2443         return cd->type;
2444 }
2445
2446 int crypt_get_active_device(struct crypt_device *cd,
2447                             const char *name,
2448                             struct crypt_active_device *cad)
2449 {
2450         int r, readonly;
2451
2452         r = dm_query_device(name, NULL, &cad->size, &cad->iv_offset, &cad->offset,
2453                             NULL, NULL, NULL, &readonly, NULL, NULL);
2454         if (r < 0)
2455                 return r;
2456
2457         cad->flags = readonly ? CRYPT_ACTIVATE_READONLY : 0;
2458
2459         return 0;
2460 }