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, eperm = 0, 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                 if (r == -EPERM)
 513                         eperm = 1;
 514                 crypt_safe_free(passphrase_read);
 515                 passphrase_read = NULL;
 516         } while (r == -EPERM && (--tries > 0));
 517 out:
 518         if (r < 0) {
 519                 crypt_free_volume_key(*vk);
 520                 *vk = NULL;
 521
 522                 /* Report wrong passphrase if at least one try failed */
 523                 if (eperm && r == -EPIPE)
 524                         r = -EPERM;
 525         }
 526
 527         crypt_safe_free(passphrase_read);
 528         return r;
 529 }
 530
 531 static int key_from_file(struct crypt_device *cd, char *msg,
 532                           char **key, size_t *key_len,
 533                           const char *key_file, size_t key_size)
 534 {
 535         return crypt_get_key(msg, key, key_len, key_size, key_file,
 536                              cd->timeout, 0, cd);
 537 }
 538
 539 static int _crypt_init(struct crypt_device **cd,
 540                        const char *type,
 541                        struct crypt_options *options,
 542                        int load, int need_dm)
 543 {
 544         int init_by_name, r;
 545
 546         /* if it is plain device and mapping table is being reloaded
 547         initialize it by name*/
 548         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 549
 550         /* Some of old API calls do not require DM in kernel,
 551            fake initialisation by initialise it with kernel_check disabled */
 552         if (!need_dm)
 553                 (void)dm_init(NULL, 0);
 554         if (init_by_name)
 555                 r = crypt_init_by_name(cd, options->name);
 556         else
 557                 r = crypt_init(cd, options->device);
 558         if (!need_dm)
 559                 dm_exit();
 560
 561         if (r)
 562                 return -EINVAL;
 563
 564         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 565         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 566
 567         crypt_set_timeout(*cd, options->timeout);
 568         crypt_set_password_retry(*cd, options->tries);
 569         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 570         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 571
 572         if (load && !init_by_name)
 573                 r = crypt_load(*cd, type, NULL);
 574
 575         if (!r && type && !(*cd)->type) {
 576                 (*cd)->type = strdup(type);
 577                 if (!(*cd)->type)
 578                         r = -ENOMEM;
 579         }
 580
 581         if (r)
 582                 crypt_free(*cd);
 583
 584         return r;
 585 }
 586
 587 void crypt_set_log_callback(struct crypt_device *cd,
 588         void (*log)(int level, const char *msg, void *usrptr),
 589         void *usrptr)
 590 {
 591         if (!cd)
 592                 _default_log = log;
 593         else {
 594                 cd->log = log;
 595                 cd->log_usrptr = usrptr;
 596         }
 597 }
 598
 599 void crypt_set_confirm_callback(struct crypt_device *cd,
 600         int (*confirm)(const char *msg, void *usrptr),
 601         void *usrptr)
 602 {
 603         cd->confirm = confirm;
 604         cd->confirm_usrptr = usrptr;
 605 }
 606
 607 void crypt_set_password_callback(struct crypt_device *cd,
 608         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 609         void *usrptr)
 610 {
 611         cd->password = password;
 612         cd->password_usrptr = usrptr;
 613 }
 614
 615 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 616  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 617  *          flags, icb */
 618 static int crypt_create_and_update_device(struct crypt_options *options, int update)
 619 {
 620         struct crypt_device *cd = NULL;
 621         char *passphrase = NULL;
 622         size_t passphrase_size = 0;
 623         int r;
 624
 625         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 626         if (r)
 627                 return r;
 628
 629         r = crypt_get_key(_("Enter passphrase: "), &passphrase, &passphrase_size,
 630                           options->key_size, options->key_file,
 631                           cd->timeout, cd->password_verify, cd);
 632         if (!r)
 633                 r = create_device_helper(cd, options->name, options->hash,
 634                         options->cipher, NULL, options->key_file,
 635                         passphrase, passphrase_size,
 636                         options->key_size, options->size, options->skip,
 637                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 638                         options->flags, update);
 639
 640         crypt_safe_free(passphrase);
 641         crypt_free(cd);
 642         return r;
 643 }
 644
 645 int crypt_create_device(struct crypt_options *options)
 646 {
 647         return crypt_create_and_update_device(options, 0);
 648 }
 649
 650 int crypt_update_device(struct crypt_options *options)
 651 {
 652         return crypt_create_and_update_device(options, 1);
 653 }
 654
 655 /* OPTIONS: name, size, icb */
 656 int crypt_resize_device(struct crypt_options *options)
 657 {
 658         struct crypt_device *cd = NULL;
 659         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 660         char *type = NULL;
 661         uint64_t size, skip, offset;
 662         int key_size, read_only, r;
 663
 664         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 665
 666         if (dm_init(NULL, 1) < 0)
 667                 return -ENOSYS;
 668
 669         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 670                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 671         if (r < 0) {
 672                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 673                 goto out;
 674         }
 675
 676         /* Try to determine type of device from UUID */
 677         type = CRYPT_PLAIN;
 678         if (uuid) {
 679                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 680                         type = CRYPT_PLAIN;
 681                         free (uuid);
 682                         uuid = NULL;
 683                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 684                         type = CRYPT_LUKS1;
 685         }
 686
 687         if (!options->device)
 688                 options->device = device;
 689
 690         r = _crypt_init(&cd, type, options, 1, 1);
 691         if (r)
 692                 goto out;
 693
 694         size = options->size;
 695         r = device_check_and_adjust(cd, device, 0, &size, &offset, &read_only);
 696         if (r)
 697                 goto out;
 698
 699         r = dm_create_device(options->name, device, cipher, type,
 700                              crypt_get_uuid(cd), size, skip, offset,
 701                              key_size, key, read_only, 1);
 702 out:
 703         crypt_safe_free(key);
 704         free(cipher);
 705         if (options->device == device)
 706                 options->device = NULL;
 707         free(device);
 708         free(uuid);
 709         crypt_free(cd);
 710         dm_exit();
 711         return r;
 712 }
 713
 714 /* OPTIONS: name, icb */
 715 int crypt_query_device(struct crypt_options *options)
 716 {
 717         int read_only, r;
 718
 719         log_dbg("Query device %s.", options->name);
 720
 721         if (dm_init(NULL, 1) < 0)
 722                 return -ENOSYS;
 723
 724         r = dm_status_device(options->name);
 725         if (r < 0)
 726                 goto out;
 727
 728         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 729                             &options->skip, &options->offset, (char **)&options->cipher,
 730                             &options->key_size, NULL, &read_only, NULL, NULL);
 731         if (r >= 0) {
 732                 if (read_only)
 733                         options->flags |= CRYPT_FLAG_READONLY;
 734
 735                 options->flags |= CRYPT_FLAG_FREE_DEVICE;
 736                 options->flags |= CRYPT_FLAG_FREE_CIPHER;
 737
 738                 r = 1;
 739         }
 740 out:
 741         if (r == -ENODEV)
 742                 r = 0;
 743
 744         dm_exit();
 745         return r;
 746 }
 747
 748 /* OPTIONS: name, icb */
 749 int crypt_remove_device(struct crypt_options *options)
 750 {
 751         struct crypt_device *cd = NULL;
 752         int r;
 753
 754         r = crypt_init_by_name(&cd, options->name);
 755         if (r == 0)
 756                 r = crypt_deactivate(cd, options->name);
 757
 758         crypt_free(cd);
 759         return r;
 760
 761 }
 762
 763 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 764  *          new_key_file, iteration_time, timeout, flags, icb */
 765 int crypt_luksFormat(struct crypt_options *options)
 766 {
 767         char cipherName[LUKS_CIPHERNAME_L];
 768         char cipherMode[LUKS_CIPHERMODE_L];
 769         char *password=NULL;
 770         size_t passwordLen;
 771         struct crypt_device *cd = NULL;
 772         struct crypt_params_luks1 cp = {
 773                 .hash = options->hash,
 774                 .data_alignment = options->align_payload
 775         };
 776         int r;
 777
 778         r = crypt_parse_name_and_mode(options->cipher, cipherName, NULL, cipherMode);
 779         if(r < 0) {
 780                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 781                 return r;
 782         }
 783
 784         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 785                 return r;
 786
 787         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 788                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 789                         options->key_slot, LUKS_NUMKEYS - 1);
 790                 r = -EINVAL;
 791                 goto out;
 792         }
 793
 794         r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 795                           options->new_key_file, cd->timeout, cd->password_verify, cd);
 796
 797         if(r < 0)
 798                 goto out;
 799
 800         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 801                          NULL, NULL, options->key_size, &cp);
 802         if (r < 0)
 803                 goto out;
 804
 805         /* Add keyslot using internally stored volume key generated during format */
 806         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 807                                             password, passwordLen);
 808 out:
 809         crypt_free(cd);
 810         crypt_safe_free(password);
 811         return (r < 0) ? r : 0;
 812 }
 813
 814 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 815 int crypt_luksOpen(struct crypt_options *options)
 816 {
 817         struct crypt_device *cd = NULL;
 818         uint32_t flags = 0;
 819         int r;
 820
 821         if (!options->name)
 822                 return -EINVAL;
 823
 824         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 825         if (r)
 826                 return r;
 827
 828         if (options->flags & CRYPT_FLAG_READONLY)
 829                 flags |= CRYPT_ACTIVATE_READONLY;
 830
 831         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 832                 flags |= CRYPT_ACTIVATE_NO_UUID;
 833
 834         if (options->key_file)
 835                 r = crypt_activate_by_keyfile(cd, options->name,
 836                         CRYPT_ANY_SLOT, options->key_file, 0,
 837                         flags);
 838         else
 839                 r = crypt_activate_by_passphrase(cd, options->name,
 840                         CRYPT_ANY_SLOT, options->passphrase,
 841                         options->passphrase ? strlen(options->passphrase) : 0,
 842                         flags);
 843
 844         crypt_free(cd);
 845         return (r < 0) ? r : 0;
 846 }
 847
 848 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 849 int crypt_luksKillSlot(struct crypt_options *options)
 850 {
 851         struct crypt_device *cd = NULL;
 852         int r;
 853
 854         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 855         if (r)
 856                 return r;
 857
 858         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 859                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 860
 861         crypt_free(cd);
 862         return (r < 0) ? r : 0;
 863 }
 864
 865 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 866 int crypt_luksRemoveKey(struct crypt_options *options)
 867 {
 868         struct crypt_device *cd = NULL;
 869         int r;
 870
 871         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 872         if (r)
 873                 return r;
 874
 875         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 876                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 877
 878         crypt_free(cd);
 879         return (r < 0) ? r : 0;
 880 }
 881
 882
 883 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 884             iteration_time, timeout, icb */
 885 int crypt_luksAddKey(struct crypt_options *options)
 886 {
 887         struct crypt_device *cd = NULL;
 888         int r = -EINVAL;
 889
 890         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 891         if (r)
 892                 return r;
 893
 894         if (options->key_file || options->new_key_file)
 895                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 896                                                  options->key_file, 0,
 897                                                  options->new_key_file, 0);
 898         else
 899                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 900                                                     NULL, 0, NULL, 0);
 901
 902         crypt_free(cd);
 903         return (r < 0) ? r : 0;
 904 }
 905
 906 /* OPTIONS: device, icb */
 907 int crypt_luksUUID(struct crypt_options *options)
 908 {
 909         struct crypt_device *cd = NULL;
 910         char *uuid;
 911         int r;
 912
 913         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 914         if (r)
 915                 return r;
 916
 917         uuid = (char *)crypt_get_uuid(cd);
 918         log_std(cd, uuid ?: "");
 919         log_std(cd, "\n");
 920         crypt_free(cd);
 921         return 0;
 922 }
 923
 924 /* OPTIONS: device, icb */
 925 int crypt_isLuks(struct crypt_options *options)
 926 {
 927         struct crypt_device *cd = NULL;
 928         int r;
 929
 930         log_dbg("Check device %s for LUKS header.", options->device);
 931
 932         r = init_crypto(cd);
 933         if (r < 0)
 934                 return r;
 935
 936         r = crypt_init(&cd, options->device);
 937         if (r < 0)
 938                 return -EINVAL;
 939
 940         /* Do print fail here, no need to crypt_load() */
 941         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 942
 943         crypt_free(cd);
 944         return r;
 945 }
 946
 947 /* OPTIONS: device, icb */
 948 int crypt_luksDump(struct crypt_options *options)
 949 {
 950         struct crypt_device *cd = NULL;
 951         int r;
 952
 953         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 954         if(r < 0)
 955                 return r;
 956
 957         r = crypt_dump(cd);
 958
 959         crypt_free(cd);
 960         return r;
 961 }
 962
 963 void crypt_get_error(char *buf, size_t size)
 964 {
 965         const char *error = get_error();
 966
 967         if (!buf || size < 1)
 968                 set_error(NULL);
 969         else if (error) {
 970                 strncpy(buf, error, size - 1);
 971                 buf[size - 1] = '\0';
 972                 set_error(NULL);
 973         } else
 974                 buf[0] = '\0';
 975 }
 976
 977 void crypt_put_options(struct crypt_options *options)
 978 {
 979         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 980                 free((char *)options->device);
 981                 options->device = NULL;
 982                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 983         }
 984         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 985                 free((char *)options->cipher);
 986                 options->cipher = NULL;
 987                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 988         }
 989 }
 990
 991 const char *crypt_get_dir(void)
 992 {
 993         return dm_get_dir();
 994 }
 995
 996 /////////////////////////////////
 997 //
 998 // New API
 999 //
1000
1001 int crypt_init(struct crypt_device **cd, const char *device)
1002 {
1003         struct crypt_device *h = NULL;
1004         int r, readonly = 0;
1005
1006         if (!cd)
1007                 return -EINVAL;
1008
1009         log_dbg("Allocating crypt device %s context.", device);
1010
1011         if (!(h = malloc(sizeof(struct crypt_device))))
1012                 return -ENOMEM;
1013
1014         memset(h, 0, sizeof(*h));
1015         h->loop_fd = -1;
1016
1017         if (device) {
1018                 r = device_ready(NULL, device, O_RDONLY);
1019                 if (r == -ENOTBLK) {
1020                         h->device = crypt_loop_get_device();
1021                         log_dbg("Not a block device, %s%s.",
1022                                 h->device ? "using free loop device " :
1023                                          "no free loop device found",
1024                                 h->device ?: "");
1025                         if (!h->device) {
1026                                 log_err(NULL, _("Cannot find a free loopback device.\n"));
1027                                 r = -ENOSYS;
1028                                 goto bad;
1029                         }
1030
1031                         /* Keep the loop open, dettached on last close. */
1032                         h->loop_fd = crypt_loop_attach(h->device, device, 0, 1, &readonly);
1033                         if (h->loop_fd == -1) {
1034                                 log_err(NULL, _("Attaching loopback device failed "
1035                                         "(loop device with autoclear flag is required).\n"));
1036                                 r = -EINVAL;
1037                                 goto bad;
1038                         }
1039
1040                         h->backing_file = crypt_loop_backing_file(h->device);
1041                         r = device_ready(NULL, h->device, O_RDONLY);
1042                 }
1043                 if (r < 0) {
1044                         r = -ENOTBLK;
1045                         goto bad;
1046                 }
1047         }
1048
1049         if (!h->device && device && !(h->device = strdup(device))) {
1050                 r = -ENOMEM;
1051                 goto bad;
1052         }
1053
1054         if (dm_init(h, 1) < 0) {
1055                 r = -ENOSYS;
1056                 goto bad;
1057         }
1058
1059         h->iteration_time = 1000;
1060         h->password_verify = 0;
1061         h->tries = 3;
1062         h->rng_type = crypt_random_default_key_rng();
1063         *cd = h;
1064         return 0;
1065 bad:
1066
1067         if (h) {
1068                 if (h->loop_fd != -1)
1069                         close(h->loop_fd);
1070                 free(h->device);
1071                 free(h->backing_file);
1072         }
1073         free(h);
1074         return r;
1075 }
1076
1077 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1078 {
1079         crypt_status_info ci;
1080         struct crypt_active_device cad;
1081         char *device = NULL, *cipher_full = NULL, *device_uuid = NULL;
1082         char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
1083         char *key = NULL;
1084         int key_size = 0, key_nums, r;
1085
1086
1087         log_dbg("Allocating crypt device context by device %s.", name);
1088
1089         ci = crypt_status(NULL, name);
1090         if (ci == CRYPT_INVALID)
1091                 return -ENODEV;
1092
1093         if (ci < CRYPT_ACTIVE) {
1094                 log_err(NULL, _("Device %s is not active.\n"), name);
1095                 return -ENODEV;
1096         }
1097
1098         r = dm_query_device(name, &device, &cad.size, &cad.iv_offset, &cad.offset,
1099                             &cipher_full, &key_size, &key, NULL, NULL,
1100                             &device_uuid);
1101         if (r < 0)
1102                 goto out;
1103
1104         *cd = NULL;
1105         r = crypt_init(cd, device);
1106
1107         /* Underlying device disappeared but mapping still active */
1108         if (!device || r == -ENOTBLK)
1109                 log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
1110                             name);
1111
1112         /* Underlying device is not readable but crypt mapping exists */
1113         if (r == -ENOTBLK) {
1114                 free(device);
1115                 device = NULL;
1116                 r = crypt_init(cd, NULL);
1117         }
1118
1119         if (r < 0)
1120                 goto out;
1121
1122         /* Try to initialise basic parameters from active device */
1123
1124         if (!(*cd)->backing_file && device && crypt_loop_device(device) &&
1125             !((*cd)->backing_file = crypt_loop_backing_file(device))) {
1126                 r = -ENOMEM;
1127                 goto out;
1128         }
1129
1130         if (device_uuid) {
1131                 if (!strncmp(CRYPT_PLAIN, device_uuid, sizeof(CRYPT_PLAIN)-1)) {
1132                         (*cd)->type = strdup(CRYPT_PLAIN);
1133                         (*cd)->plain_uuid = strdup(device_uuid);
1134                         (*cd)->plain_hdr.hash = NULL; /* no way to get this */
1135                         (*cd)->plain_hdr.offset = cad.offset;
1136                         (*cd)->plain_hdr.skip = cad.iv_offset;
1137                         (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1138                         if (!(*cd)->volume_key) {
1139                                 r = -ENOMEM;
1140                                 goto out;
1141                         }
1142
1143                         r = crypt_parse_name_and_mode(cipher_full, cipher, NULL, cipher_mode);
1144                         if (!r) {
1145                                 (*cd)->plain_cipher = strdup(cipher);
1146                                 (*cd)->plain_cipher_mode = strdup(cipher_mode);
1147                         }
1148                 } else if (!strncmp(CRYPT_LOOPAES, device_uuid, sizeof(CRYPT_LOOPAES)-1)) {
1149                         (*cd)->type = strdup(CRYPT_LOOPAES);
1150                         (*cd)->loopaes_uuid = strdup(device_uuid);
1151                         (*cd)->loopaes_hdr.offset = cad.offset;
1152
1153                         r = crypt_parse_name_and_mode(cipher_full, cipher,
1154                                                       &key_nums, cipher_mode);
1155                         if (!r) {
1156                                 (*cd)->loopaes_cipher = strdup(cipher);
1157                                 (*cd)->loopaes_cipher_mode = strdup(cipher_mode);
1158                                 /* version 3 uses last key for IV */
1159                                 if (key_size % key_nums)
1160                                         key_nums++;
1161                                 (*cd)->loopaes_key_size = key_size / key_nums;
1162                         }
1163                 } else if (!strncmp(CRYPT_LUKS1, device_uuid, sizeof(CRYPT_LUKS1)-1)) {
1164                         if (device) {
1165                                 if (crypt_load(*cd, CRYPT_LUKS1, NULL) < 0 ||
1166                                     crypt_volume_key_verify(*cd, key, key_size) < 0) {
1167                                         log_dbg("LUKS device header does not match active device.");
1168                                         goto out;
1169                                 }
1170
1171                                 (*cd)->volume_key = crypt_alloc_volume_key(key_size, key);
1172                                 if (!(*cd)->volume_key) {
1173                                         r = -ENOMEM;
1174                                         goto out;
1175                                 }
1176                         }
1177                 }
1178         } else
1179                 log_dbg("Active device has no UUID set, some parameters are not set.");
1180
1181 out:
1182         if (r < 0) {
1183                 crypt_free(*cd);
1184                 *cd = NULL;
1185         }
1186         crypt_safe_free(key);
1187         free(device);
1188         free(cipher_full);
1189         free(device_uuid);
1190         return r;
1191 }
1192
1193 static int _crypt_format_plain(struct crypt_device *cd,
1194                                const char *cipher,
1195                                const char *cipher_mode,
1196                                const char *uuid,
1197                                size_t volume_key_size,
1198                                struct crypt_params_plain *params)
1199 {
1200         if (!cipher || !cipher_mode) {
1201                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1202                 return -EINVAL;
1203         }
1204
1205         if (volume_key_size > 1024) {
1206                 log_err(cd, _("Invalid key size.\n"));
1207                 return -EINVAL;
1208         }
1209
1210         cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
1211         if (!cd->volume_key)
1212                 return -ENOMEM;
1213
1214         cd->plain_cipher = strdup(cipher);
1215         cd->plain_cipher_mode = strdup(cipher_mode);
1216
1217         if (uuid)
1218                 cd->plain_uuid = strdup(uuid);
1219
1220         if (params && params->hash)
1221                 cd->plain_hdr.hash = strdup(params->hash);
1222
1223         cd->plain_hdr.offset = params ? params->offset : 0;
1224         cd->plain_hdr.skip = params ? params->skip : 0;
1225
1226         if (!cd->plain_cipher || !cd->plain_cipher_mode)
1227                 return -ENOMEM;
1228
1229         return 0;
1230 }
1231
1232 static int _crypt_format_luks1(struct crypt_device *cd,
1233                                const char *cipher,
1234                                const char *cipher_mode,
1235                                const char *uuid,
1236                                const char *volume_key,
1237                                size_t volume_key_size,
1238                                struct crypt_params_luks1 *params)
1239 {
1240         int r;
1241         unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
1242         unsigned long alignment_offset = 0;
1243
1244         if (!cd->device) {
1245                 log_err(cd, _("Can't format LUKS without device.\n"));
1246                 return -EINVAL;
1247         }
1248
1249         if (volume_key)
1250                 cd->volume_key = crypt_alloc_volume_key(volume_key_size,
1251                                                       volume_key);
1252         else
1253                 cd->volume_key = crypt_generate_volume_key(cd, volume_key_size);
1254
1255         if(!cd->volume_key)
1256                 return -ENOMEM;
1257
1258         if (params && params->data_alignment)
1259                 required_alignment = params->data_alignment * SECTOR_SIZE;
1260         else
1261                 get_topology_alignment(cd->device, &required_alignment,
1262                                        &alignment_offset, DEFAULT_DISK_ALIGNMENT);
1263
1264         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1265                                (params && params->hash) ? params->hash : "sha1",
1266                                uuid, LUKS_STRIPES,
1267                                required_alignment / SECTOR_SIZE,
1268                                alignment_offset / SECTOR_SIZE,
1269                                cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1270         if(r < 0)
1271                 return r;
1272
1273         /* Wipe first 8 sectors - fs magic numbers etc. */
1274         r = wipe_device_header(cd->device, 8);
1275         if(r < 0) {
1276                 if (r == -EBUSY)
1277                         log_err(cd, _("Cannot format device %s which is still in use.\n"),
1278                                 cd->device);
1279                 else
1280                         log_err(cd, _("Cannot wipe header on device %s.\n"),
1281                                 cd->device);
1282
1283                 return r;
1284         }
1285
1286         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1287
1288         return r;
1289 }
1290
1291 static int _crypt_format_loopaes(struct crypt_device *cd,
1292                                  const char *cipher,
1293                                  const char *uuid,
1294                                  size_t volume_key_size,
1295                                  struct crypt_params_loopaes *params)
1296 {
1297         if (!cd->device) {
1298                 log_err(cd, _("Can't format LOOPAES without device.\n"));
1299                 return -EINVAL;
1300         }
1301
1302         if (volume_key_size > 1024) {
1303                 log_err(cd, _("Invalid key size.\n"));
1304                 return -EINVAL;
1305         }
1306
1307         cd->loopaes_key_size = volume_key_size;
1308
1309         cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
1310
1311         if (uuid)
1312                 cd->loopaes_uuid = strdup(uuid);
1313
1314         if (params && params->hash)
1315                 cd->loopaes_hdr.hash = strdup(params->hash);
1316
1317         cd->loopaes_hdr.offset = params ? params->offset : 0;
1318         cd->loopaes_hdr.skip = params ? params->skip : 0;
1319
1320         return 0;
1321 }
1322
1323 int crypt_format(struct crypt_device *cd,
1324         const char *type,
1325         const char *cipher,
1326         const char *cipher_mode,
1327         const char *uuid,
1328         const char *volume_key,
1329         size_t volume_key_size,
1330         void *params)
1331 {
1332         int r;
1333
1334         if (!type)
1335                 return -EINVAL;
1336
1337         log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", type);
1338
1339         r = init_crypto(cd);
1340         if (r < 0)
1341                 return r;
1342
1343         if (isPLAIN(type))
1344                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1345                                         uuid, volume_key_size, params);
1346         else if (isLUKS(type))
1347                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1348                                         uuid, volume_key, volume_key_size, params);
1349         else if (isLOOPAES(type))
1350                 r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
1351         else {
1352                 /* FIXME: allow plugins here? */
1353                 log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
1354                 r = -EINVAL;
1355         }
1356
1357         if (!r && !(cd->type = strdup(type)))
1358                 r = -ENOMEM;
1359
1360         if (r < 0) {
1361                 crypt_free_volume_key(cd->volume_key);
1362                 cd->volume_key = NULL;
1363         }
1364
1365         return r;
1366 }
1367
1368 int crypt_load(struct crypt_device *cd,
1369                const char *requested_type,
1370                void *params)
1371 {
1372         struct luks_phdr hdr;
1373         int r;
1374
1375         log_dbg("Trying to load %s crypt type from device %s.",
1376                 requested_type ?: "any", cd->device ?: "(none)");
1377
1378         if (!cd->device)
1379                 return -EINVAL;
1380
1381         if (requested_type && !isLUKS(requested_type))
1382                 return -EINVAL;
1383
1384         r = init_crypto(cd);
1385         if (r < 0)
1386                 return r;
1387
1388         r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
1389
1390         if (!r) {
1391                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1392                 cd->type = strdup(CRYPT_LUKS1);
1393                 if (!cd->type)
1394                         r = -ENOMEM;
1395         }
1396
1397         return r;
1398 }
1399
1400 int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
1401 {
1402         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
1403         uint64_t size, skip, offset;
1404         int key_size, read_only, r;
1405
1406         /* Device context type must be initialised */
1407         if (!cd->type || !crypt_get_uuid(cd))
1408                 return -EINVAL;
1409
1410         r = dm_query_device(name, &device, &size, &skip, &offset,
1411                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
1412         if (r < 0) {
1413                 log_err(NULL, _("Device %s is not active.\n"), name);
1414                 goto out;
1415         }
1416
1417         if (!uuid) {
1418                 r = -EINVAL;
1419                 goto out;
1420         }
1421
1422         r = device_check_and_adjust(cd, device, 0, &new_size, &offset, &read_only);
1423         if (r)
1424                 goto out;
1425
1426         if (new_size == size) {
1427                 log_dbg("Device has already requested size %" PRIu64
1428                         " sectors.", size);
1429                 r = 0;
1430                 goto out;
1431         }
1432
1433         log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
1434
1435         r = dm_create_device(name, device, cipher, cd->type,
1436                              crypt_get_uuid(cd), new_size, skip, offset,
1437                              key_size, key, read_only, 1);
1438 out:
1439         crypt_safe_free(key);
1440         free(cipher);
1441         free(device);
1442         free(uuid);
1443
1444         return r;
1445 }
1446
1447 int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
1448 {
1449         if (!isLUKS(cd->type)) {
1450                 log_err(cd, _("This operation is not supported for this device type.\n"));
1451                 return  -EINVAL;
1452         }
1453
1454         if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
1455                 log_dbg("UUID is the same as requested (%s) for device %s.",
1456                         uuid, cd->device);
1457                 return 0;
1458         }
1459
1460         if (uuid)
1461                 log_dbg("Requested new UUID change to %s for %s.", uuid, cd->device);
1462         else
1463                 log_dbg("Requested new UUID refresh for %s.", cd->device);
1464
1465         if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
1466                 return -EPERM;
1467
1468         return LUKS_hdr_uuid_set(cd->device, &cd->hdr, uuid, cd);
1469 }
1470
1471 int crypt_header_backup(struct crypt_device *cd,
1472                         const char *requested_type,
1473                         const char *backup_file)
1474 {
1475         int r;
1476
1477         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1478                 return -EINVAL;
1479
1480         r = init_crypto(cd);
1481         if (r < 0)
1482                 return r;
1483
1484         log_dbg("Requested header backup of device %s (%s) to "
1485                 "file %s.", cd->device, requested_type, backup_file);
1486
1487         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1488 }
1489
1490 int crypt_header_restore(struct crypt_device *cd,
1491                          const char *requested_type,
1492                          const char *backup_file)
1493 {
1494         int r;
1495
1496         if (requested_type && !isLUKS(requested_type))
1497                 return -EINVAL;
1498
1499         /* Some hash functions need initialized gcrypt library */
1500         r = init_crypto(cd);
1501         if (r < 0)
1502                 return r;
1503
1504         log_dbg("Requested header restore to device %s (%s) from "
1505                 "file %s.", cd->device, requested_type, backup_file);
1506
1507         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1508 }
1509
1510 void crypt_free(struct crypt_device *cd)
1511 {
1512         if (cd) {
1513                 log_dbg("Releasing crypt device %s context.", cd->device);
1514
1515                 if (cd->loop_fd != -1)
1516                         close(cd->loop_fd);
1517
1518                 dm_exit();
1519                 crypt_free_volume_key(cd->volume_key);
1520
1521                 free(cd->device);
1522                 free(cd->backing_file);
1523                 free(cd->type);
1524
1525                 /* used in plain device only */
1526                 free((char*)cd->plain_hdr.hash);
1527                 free(cd->plain_cipher);
1528                 free(cd->plain_cipher_mode);
1529                 free(cd->plain_uuid);
1530
1531                 free(cd);
1532         }
1533 }
1534
1535 int crypt_suspend(struct crypt_device *cd,
1536                   const char *name)
1537 {
1538         crypt_status_info ci;
1539         int r, suspended = 0;
1540
1541         log_dbg("Suspending volume %s.", name);
1542
1543         ci = crypt_status(NULL, name);
1544         if (ci < CRYPT_ACTIVE) {
1545                 log_err(cd, _("Volume %s is not active.\n"), name);
1546                 return -EINVAL;
1547         }
1548
1549         if (!cd && dm_init(NULL, 1) < 0)
1550                 return -ENOSYS;
1551
1552         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1553                             NULL, NULL, NULL, NULL, &suspended, NULL);
1554         if (r < 0)
1555                 goto out;
1556
1557         if (suspended) {
1558                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1559                 r = -EINVAL;
1560                 goto out;
1561         }
1562
1563         r = dm_suspend_and_wipe_key(name);
1564         if (r == -ENOTSUP)
1565                 log_err(cd, "Suspend is not supported for device %s.\n", name);
1566         else if (r)
1567                 log_err(cd, "Error during suspending device %s.\n", name);
1568 out:
1569         if (!cd)
1570                 dm_exit();
1571         return r;
1572 }
1573
1574 int crypt_resume_by_passphrase(struct crypt_device *cd,
1575                                const char *name,
1576                                int keyslot,
1577                                const char *passphrase,
1578                                size_t passphrase_size)
1579 {
1580         struct volume_key *vk = NULL;
1581         int r, suspended = 0;
1582
1583         log_dbg("Resuming volume %s.", name);
1584
1585         if (!isLUKS(cd->type)) {
1586                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1587                 r = -EINVAL;
1588                 goto out;
1589         }
1590
1591         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1592                             NULL, NULL, NULL, NULL, &suspended, NULL);
1593         if (r < 0)
1594                 return r;
1595
1596         if (!suspended) {
1597                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1598                 return -EINVAL;
1599         }
1600
1601         if (passphrase) {
1602                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1603                                            passphrase_size, &cd->hdr, &vk, cd);
1604         } else
1605                 r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1606
1607         if (r >= 0) {
1608                 keyslot = r;
1609                 r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1610                 if (r == -ENOTSUP)
1611                         log_err(cd, "Resume is not supported for device %s.\n", name);
1612                 else if (r)
1613                         log_err(cd, "Error during resuming device %s.\n", name);
1614         } else
1615                 r = keyslot;
1616 out:
1617         crypt_free_volume_key(vk);
1618         return r < 0 ? r : keyslot;
1619 }
1620
1621 int crypt_resume_by_keyfile(struct crypt_device *cd,
1622                             const char *name,
1623                             int keyslot,
1624                             const char *keyfile,
1625                             size_t keyfile_size)
1626 {
1627         struct volume_key *vk = NULL;
1628         char *passphrase_read = NULL;
1629         size_t passphrase_size_read;
1630         int r, suspended = 0;
1631
1632         log_dbg("Resuming volume %s.", name);
1633
1634         if (!isLUKS(cd->type)) {
1635                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1636                 r = -EINVAL;
1637                 goto out;
1638         }
1639
1640         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1641                             NULL, NULL, NULL, NULL, &suspended, NULL);
1642         if (r < 0)
1643                 return r;
1644
1645         if (!suspended) {
1646                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1647                 return -EINVAL;
1648         }
1649
1650         if (!keyfile)
1651                 return -EINVAL;
1652
1653         r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1654                           &passphrase_size_read, keyfile, keyfile_size);
1655         if (r < 0)
1656                 goto out;
1657
1658         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1659                                    passphrase_size_read, &cd->hdr, &vk, cd);
1660         if (r < 0)
1661                 goto out;
1662
1663         keyslot = r;
1664         r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
1665         if (r)
1666                 log_err(cd, "Error during resuming device %s.\n", name);
1667 out:
1668         crypt_safe_free(passphrase_read);
1669         crypt_free_volume_key(vk);
1670         return r < 0 ? r : keyslot;
1671 }
1672
1673 // slot manipulation
1674 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1675         int keyslot, // -1 any
1676         const char *passphrase, // NULL -> terminal
1677         size_t passphrase_size,
1678         const char *new_passphrase, // NULL -> terminal
1679         size_t new_passphrase_size)
1680 {
1681         struct volume_key *vk = NULL;
1682         char *password = NULL, *new_password = NULL;
1683         size_t passwordLen, new_passwordLen;
1684         int r;
1685
1686         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1687                 "new passphrase %sprovided.",
1688                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1689
1690         if (!isLUKS(cd->type)) {
1691                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1692                 return -EINVAL;
1693         }
1694
1695         r = keyslot_verify_or_find_empty(cd, &keyslot);
1696         if (r)
1697                 return r;
1698
1699         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1700                 /* No slots used, try to use pre-generated key in header */
1701                 if (cd->volume_key) {
1702                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1703                         r = vk ? 0 : -ENOMEM;
1704                 } else {
1705                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1706                         return -EINVAL;
1707                 }
1708         } else if (passphrase) {
1709                 /* Passphrase provided, use it to unlock existing keyslot */
1710                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1711                                            passphrase_size, &cd->hdr, &vk, cd);
1712         } else {
1713                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1714                 r = key_from_terminal(cd, _("Enter any passphrase: "),
1715                                       &password, &passwordLen, 0);
1716                 if (r < 0)
1717                         goto out;
1718
1719                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1720                                            passwordLen, &cd->hdr, &vk, cd);
1721                 crypt_safe_free(password);
1722         }
1723
1724         if(r < 0)
1725                 goto out;
1726
1727         if (new_passphrase) {
1728                 new_password = (char *)new_passphrase;
1729                 new_passwordLen = new_passphrase_size;
1730         } else {
1731                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1732                                       &new_password, &new_passwordLen, 1);
1733                 if(r < 0)
1734                         goto out;
1735         }
1736
1737         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1738                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1739         if(r < 0) goto out;
1740
1741         r = 0;
1742 out:
1743         if (!new_passphrase)
1744                 crypt_safe_free(new_password);
1745         crypt_free_volume_key(vk);
1746         return r ?: keyslot;
1747 }
1748
1749 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1750         int keyslot,
1751         const char *keyfile,
1752         size_t keyfile_size,
1753         const char *new_keyfile,
1754         size_t new_keyfile_size)
1755 {
1756         struct volume_key *vk = NULL;
1757         char *password = NULL; size_t passwordLen;
1758         char *new_password = NULL; size_t new_passwordLen;
1759         int r;
1760
1761         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1762                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1763
1764         if (!isLUKS(cd->type)) {
1765                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1766                 return -EINVAL;
1767         }
1768
1769         r = keyslot_verify_or_find_empty(cd, &keyslot);
1770         if (r)
1771                 return r;
1772
1773         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1774                 /* No slots used, try to use pre-generated key in header */
1775                 if (cd->volume_key) {
1776                         vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1777                         r = vk ? 0 : -ENOMEM;
1778                 } else {
1779                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1780                         return -EINVAL;
1781                 }
1782         } else {
1783                 /* Read password from file of (if NULL) from terminal */
1784                 if (keyfile)
1785                         r = key_from_file(cd, _("Enter any passphrase: "),
1786                                           &password, &passwordLen,
1787                                           keyfile, keyfile_size);
1788                 else
1789                         r = key_from_terminal(cd, _("Enter any passphrase: "),
1790                                               &password, &passwordLen, 0);
1791                 if (r < 0)
1792                         goto out;
1793
1794                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1795                                            &cd->hdr, &vk, cd);
1796         }
1797
1798         if(r < 0)
1799                 goto out;
1800
1801         if (new_keyfile)
1802                 r = key_from_file(cd, _("Enter new passphrase for key slot: "),
1803                                   &new_password, &new_passwordLen, new_keyfile,
1804                                   new_keyfile_size);
1805         else
1806                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1807                                       &new_password, &new_passwordLen, 1);
1808         if (r < 0)
1809                 goto out;
1810
1811         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1812                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1813 out:
1814         crypt_safe_free(password);
1815         crypt_safe_free(new_password);
1816         crypt_free_volume_key(vk);
1817         return r < 0 ? r : keyslot;
1818 }
1819
1820 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1821         int keyslot,
1822         const char *volume_key,
1823         size_t volume_key_size,
1824         const char *passphrase,
1825         size_t passphrase_size)
1826 {
1827         struct volume_key *vk = NULL;
1828         int r = -EINVAL;
1829         char *new_password = NULL; size_t new_passwordLen;
1830
1831         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1832
1833         if (!isLUKS(cd->type)) {
1834                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1835                 return -EINVAL;
1836         }
1837
1838         if (volume_key)
1839                 vk = crypt_alloc_volume_key(volume_key_size, volume_key);
1840         else if (cd->volume_key)
1841                 vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
1842
1843         if (!vk)
1844                 return -ENOMEM;
1845
1846         r = LUKS_verify_volume_key(&cd->hdr, vk);
1847         if (r < 0) {
1848                 log_err(cd, _("Volume key does not match the volume.\n"));
1849                 goto out;
1850         }
1851
1852         r = keyslot_verify_or_find_empty(cd, &keyslot);
1853         if (r)
1854                 goto out;
1855
1856         if (!passphrase) {
1857                 r = key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1858                                       &new_password, &new_passwordLen, 1);
1859                 if (r < 0)
1860                         goto out;
1861                 passphrase = new_password;
1862                 passphrase_size = new_passwordLen;
1863         }
1864
1865         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1866                          &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1867 out:
1868         crypt_safe_free(new_password);
1869         crypt_free_volume_key(vk);
1870         return (r < 0) ? r : keyslot;
1871 }
1872
1873 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1874 {
1875         crypt_keyslot_info ki;
1876
1877         log_dbg("Destroying keyslot %d.", keyslot);
1878
1879         if (!isLUKS(cd->type)) {
1880                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1881                 return -EINVAL;
1882         }
1883
1884         ki = crypt_keyslot_status(cd, keyslot);
1885         if (ki == CRYPT_SLOT_INVALID) {
1886                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1887                 return -EINVAL;
1888         }
1889
1890         if (ki == CRYPT_SLOT_INACTIVE) {
1891                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1892                 return -EINVAL;
1893         }
1894
1895         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1896 }
1897
1898 // activation/deactivation of device mapping
1899 int crypt_activate_by_passphrase(struct crypt_device *cd,
1900         const char *name,
1901         int keyslot,
1902         const char *passphrase,
1903         size_t passphrase_size,
1904         uint32_t flags)
1905 {
1906         crypt_status_info ci;
1907         struct volume_key *vk = NULL;
1908         char *read_passphrase = NULL;
1909         size_t passphraseLen = 0;
1910         int r;
1911
1912         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1913                 name ? "Activating" : "Checking", name ?: "",
1914                 keyslot, passphrase ? "" : "[none] ");
1915
1916         if (name) {
1917                 ci = crypt_status(NULL, name);
1918                 if (ci == CRYPT_INVALID)
1919                         return -EINVAL;
1920                 else if (ci >= CRYPT_ACTIVE) {
1921                         log_err(cd, _("Device %s already exists.\n"), name);
1922                         return -EEXIST;
1923                 }
1924         }
1925
1926         /* plain, use hashed passphrase */
1927         if (isPLAIN(cd->type)) {
1928                 if (!passphrase) {
1929                         r = key_from_terminal(cd, NULL, &read_passphrase,
1930                                               &passphraseLen, 0);
1931                         if (r < 0)
1932                                 goto out;
1933                         passphrase = read_passphrase;
1934                         passphrase_size = passphraseLen;
1935                 }
1936                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
1937                                          cd->plain_cipher, cd->plain_cipher_mode,
1938                                          NULL, passphrase, passphrase_size,
1939                                          cd->volume_key->keylength, 0,
1940                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
1941                                          cd->plain_uuid,
1942                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1943                 keyslot = 0;
1944         } else if (isLUKS(cd->type)) {
1945                 /* provided passphrase, do not retry */
1946                 if (passphrase) {
1947                         r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1948                                                    passphrase_size, &cd->hdr, &vk, cd);
1949                 } else
1950                         r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
1951
1952                 if (r >= 0) {
1953                         keyslot = r;
1954                         if (name)
1955                                 r = open_from_hdr_and_vk(cd, vk, name, flags);
1956                 }
1957         } else
1958                 r = -EINVAL;
1959 out:
1960         crypt_safe_free(read_passphrase);
1961         crypt_free_volume_key(vk);
1962
1963         return r < 0  ? r : keyslot;
1964 }
1965
1966 int crypt_activate_by_keyfile(struct crypt_device *cd,
1967         const char *name,
1968         int keyslot,
1969         const char *keyfile,
1970         size_t keyfile_size,
1971         uint32_t flags)
1972 {
1973         crypt_status_info ci;
1974         struct volume_key *vk = NULL;
1975         char *passphrase_read = NULL;
1976         size_t passphrase_size_read;
1977         unsigned int key_count = 0;
1978         int r;
1979
1980         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1981                 name ?: "", keyslot, keyfile ?: "[none]");
1982
1983         if (name) {
1984                 ci = crypt_status(NULL, name);
1985                 if (ci == CRYPT_INVALID)
1986                         return -EINVAL;
1987                 else if (ci >= CRYPT_ACTIVE) {
1988                         log_err(cd, _("Device %s already exists.\n"), name);
1989                         return -EEXIST;
1990                 }
1991         }
1992
1993         if (!keyfile)
1994                 return -EINVAL;
1995
1996         if (isPLAIN(cd->type)) {
1997                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1998                                   &passphrase_size_read, keyfile, keyfile_size);
1999                 if (r < 0)
2000                         goto out;
2001                 r = create_device_helper(cd, name, cd->plain_hdr.hash,
2002                                          cd->plain_cipher, cd->plain_cipher_mode,
2003                                          NULL, passphrase_read, passphrase_size_read,
2004                                          cd->volume_key->keylength, 0,
2005                                          cd->plain_hdr.skip, cd->plain_hdr.offset,
2006                                          cd->plain_uuid,
2007                                          flags & CRYPT_ACTIVATE_READONLY, 0, 0);
2008         } else if (isLUKS(cd->type)) {
2009                 r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
2010                           &passphrase_size_read, keyfile, keyfile_size);
2011                 if (r < 0)
2012                         goto out;
2013                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
2014                                            passphrase_size_read, &cd->hdr, &vk, cd);
2015                 if (r < 0)
2016                         goto out;
2017                 keyslot = r;
2018
2019                 if (name) {
2020                         r = open_from_hdr_and_vk(cd, vk, name, flags);
2021                         if (r < 0)
2022                                 goto out;
2023                 }
2024                 r = keyslot;
2025         } else if (isLOOPAES(cd->type)) {
2026                 r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read,
2027                                   keyfile, keyfile_size);
2028                 if (r < 0)
2029                         goto out;
2030                 r = LOOPAES_parse_keyfile(cd, &vk, &key_count,
2031                                           passphrase_read, passphrase_size_read);
2032                 if (r < 0)
2033                         goto out;
2034                 if (name)
2035                         r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
2036                                              key_count, vk,
2037                                              cd->loopaes_hdr.offset,
2038                                              cd->loopaes_hdr.skip,
2039                                              flags);
2040         } else
2041                 r = -EINVAL;
2042
2043 out:
2044         crypt_safe_free(passphrase_read);
2045         crypt_free_volume_key(vk);
2046
2047         return r;
2048 }
2049
2050 int crypt_activate_by_volume_key(struct crypt_device *cd,
2051         const char *name,
2052         const char *volume_key,
2053         size_t volume_key_size,
2054         uint32_t flags)
2055 {
2056         crypt_status_info ci;
2057         struct volume_key *vk;
2058         int r;
2059
2060         log_dbg("Activating volume %s by volume key.", name);
2061
2062         /* use key directly, no hash */
2063         if (isPLAIN(cd->type)) {
2064                 if (!volume_key || !volume_key_size || !cd->volume_key ||
2065                         volume_key_size != cd->volume_key->keylength) {
2066                         log_err(cd, _("Incorrect volume key specified for plain device.\n"));
2067                         return -EINVAL;
2068                 }
2069
2070                 return create_device_helper(cd, name, NULL,
2071                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
2072                         cd->volume_key->keylength, 0, cd->plain_hdr.skip,
2073                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
2074         }
2075
2076         if (!isLUKS(cd->type)) {
2077                 log_err(cd, _("Device type is not properly initialised.\n"));
2078                 return -EINVAL;
2079         }
2080
2081         if (name) {
2082                 ci = crypt_status(NULL, name);
2083                 if (ci == CRYPT_INVALID)
2084                         return -EINVAL;
2085                 else if (ci >= CRYPT_ACTIVE) {
2086                         log_err(cd, _("Device %s already exists.\n"), name);
2087                         return -EEXIST;
2088                 }
2089         }
2090
2091         /* If key is not provided, try to use internal key */
2092         if (!volume_key) {
2093                 if (!cd->volume_key) {
2094                         log_err(cd, _("Volume key does not match the volume.\n"));
2095                         return -EINVAL;
2096                 }
2097                 volume_key_size = cd->volume_key->keylength;
2098                 volume_key = cd->volume_key->key;
2099         }
2100
2101         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2102         if (!vk)
2103                 return -ENOMEM;
2104         r = LUKS_verify_volume_key(&cd->hdr, vk);
2105
2106         if (r == -EPERM)
2107                 log_err(cd, _("Volume key does not match the volume.\n"));
2108
2109         if (!r && name)
2110                 r = open_from_hdr_and_vk(cd, vk, name, flags);
2111
2112         crypt_free_volume_key(vk);
2113
2114         return r;
2115 }
2116
2117 int crypt_deactivate(struct crypt_device *cd, const char *name)
2118 {
2119         int r;
2120
2121         if (!name)
2122                 return -EINVAL;
2123
2124         log_dbg("Deactivating volume %s.", name);
2125
2126         if (!cd && dm_init(NULL, 1) < 0)
2127                 return -ENOSYS;
2128
2129         switch (crypt_status(cd, name)) {
2130                 case CRYPT_ACTIVE:
2131                         r = dm_remove_device(name, 0, 0);
2132                         break;
2133                 case CRYPT_BUSY:
2134                         log_err(cd, _("Device %s is busy.\n"), name);
2135                         r = -EBUSY;
2136                         break;
2137                 case CRYPT_INACTIVE:
2138                         log_err(cd, _("Device %s is not active.\n"), name);
2139                         r = -ENODEV;
2140                         break;
2141                 default:
2142                         log_err(cd, _("Invalid device %s.\n"), name);
2143                         r = -EINVAL;
2144         }
2145
2146         if (!cd)
2147                 dm_exit();
2148
2149         return r;
2150 }
2151
2152 int crypt_volume_key_get(struct crypt_device *cd,
2153         int keyslot,
2154         char *volume_key,
2155         size_t *volume_key_size,
2156         const char *passphrase,
2157         size_t passphrase_size)
2158 {
2159         struct volume_key *vk;
2160         char *processed_key = NULL;
2161         int r, key_len;
2162
2163         key_len = crypt_get_volume_key_size(cd);
2164         if (key_len > *volume_key_size) {
2165                 log_err(cd, _("Volume key buffer too small.\n"));
2166                 return -ENOMEM;
2167         }
2168
2169         if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
2170                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
2171                                             passphrase, passphrase_size);
2172                 if (!processed_key) {
2173                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
2174                         return -EINVAL;
2175                 }
2176                 memcpy(volume_key, processed_key, key_len);
2177                 *volume_key_size = key_len;
2178                 crypt_safe_free(processed_key);
2179                 return 0;
2180         }
2181
2182         if (isLUKS(cd->type)) {
2183                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
2184                                         passphrase_size, &cd->hdr, &vk, cd);
2185
2186                 if (r >= 0) {
2187                         memcpy(volume_key, vk->key, vk->keylength);
2188                         *volume_key_size = vk->keylength;
2189                 }
2190
2191                 crypt_free_volume_key(vk);
2192                 return r;
2193         }
2194
2195         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
2196         return -EINVAL;
2197 }
2198
2199 int crypt_volume_key_verify(struct crypt_device *cd,
2200         const char *volume_key,
2201         size_t volume_key_size)
2202 {
2203         struct volume_key *vk;
2204         int r;
2205
2206         if (!isLUKS(cd->type)) {
2207                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2208                 return -EINVAL;
2209         }
2210
2211         vk = crypt_alloc_volume_key(volume_key_size, volume_key);
2212         if (!vk)
2213                 return -ENOMEM;
2214
2215         r = LUKS_verify_volume_key(&cd->hdr, vk);
2216
2217         if (r == -EPERM)
2218                 log_err(cd, _("Volume key does not match the volume.\n"));
2219
2220         crypt_free_volume_key(vk);
2221
2222         return r;
2223 }
2224
2225 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
2226 {
2227         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
2228         cd->timeout = timeout_sec;
2229 }
2230
2231 void crypt_set_password_retry(struct crypt_device *cd, int tries)
2232 {
2233         log_dbg("Password retry count set to %d.", tries);
2234         cd->tries = tries;
2235 }
2236
2237 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
2238 {
2239         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
2240         cd->iteration_time = iteration_time_ms;
2241 }
2242
2243 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
2244 {
2245         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
2246         cd->password_verify = password_verify ? 1 : 0;
2247 }
2248
2249 void crypt_set_rng_type(struct crypt_device *cd, int rng_type)
2250 {
2251         switch (rng_type) {
2252         case CRYPT_RNG_URANDOM:
2253         case CRYPT_RNG_RANDOM:
2254                 log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom");
2255                 cd->rng_type = rng_type;
2256         }
2257 }
2258
2259 int crypt_get_rng_type(struct crypt_device *cd)
2260 {
2261         if (!cd)
2262                 return -EINVAL;
2263
2264         return cd->rng_type;
2265 }
2266
2267 int crypt_memory_lock(struct crypt_device *cd, int lock)
2268 {
2269         return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd);
2270 }
2271
2272 // reporting
2273 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
2274 {
2275         int r;
2276
2277         if (!cd && dm_init(NULL, 1) < 0)
2278                 return CRYPT_INVALID;
2279
2280         r = dm_status_device(name);
2281
2282         if (!cd)
2283                 dm_exit();
2284
2285         if (r < 0 && r != -ENODEV)
2286                 return CRYPT_INVALID;
2287
2288         if (r == 0)
2289                 return CRYPT_ACTIVE;
2290
2291         if (r > 0)
2292                 return CRYPT_BUSY;
2293
2294         return CRYPT_INACTIVE;
2295 }
2296
2297 static void hexprintICB(struct crypt_device *cd, char *d, int n)
2298 {
2299         int i;
2300         for(i = 0; i < n; i++)
2301                 log_std(cd, "%02hhx ", (char)d[i]);
2302 }
2303
2304 int crypt_dump(struct crypt_device *cd)
2305 {
2306         int i;
2307         if (!isLUKS(cd->type)) { //FIXME
2308                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2309                 return -EINVAL;
2310         }
2311
2312         log_std(cd, "LUKS header information for %s\n\n", cd->device);
2313         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
2314         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
2315         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
2316         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
2317         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
2318         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
2319         log_std(cd, "MK digest:     \t");
2320         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
2321         log_std(cd, "\n");
2322         log_std(cd, "MK salt:       \t");
2323         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
2324         log_std(cd, "\n               \t");
2325         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2326         log_std(cd, "\n");
2327         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
2328         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
2329         for(i = 0; i < LUKS_NUMKEYS; i++) {
2330                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
2331                         log_std(cd, "Key Slot %d: ENABLED\n",i);
2332                         log_std(cd, "\tIterations:         \t%d\n",
2333                                 cd->hdr.keyblock[i].passwordIterations);
2334                         log_std(cd, "\tSalt:               \t");
2335                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
2336                                     LUKS_SALTSIZE/2);
2337                         log_std(cd, "\n\t                      \t");
2338                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
2339                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
2340                         log_std(cd, "\n");
2341
2342                         log_std(cd, "\tKey material offset:\t%d\n",
2343                                 cd->hdr.keyblock[i].keyMaterialOffset);
2344                         log_std(cd, "\tAF stripes:            \t%d\n",
2345                                 cd->hdr.keyblock[i].stripes);
2346                 }
2347                 else
2348                         log_std(cd, "Key Slot %d: DISABLED\n", i);
2349         }
2350
2351         return 0;
2352 }
2353
2354 const char *crypt_get_cipher(struct crypt_device *cd)
2355 {
2356         if (isPLAIN(cd->type))
2357                 return cd->plain_cipher;
2358
2359         if (isLUKS(cd->type))
2360                 return cd->hdr.cipherName;
2361
2362         if (isLOOPAES(cd->type))
2363                 return cd->loopaes_cipher;
2364
2365         return NULL;
2366 }
2367
2368 const char *crypt_get_cipher_mode(struct crypt_device *cd)
2369 {
2370         if (isPLAIN(cd->type))
2371                 return cd->plain_cipher_mode;
2372
2373         if (isLUKS(cd->type))
2374                 return cd->hdr.cipherMode;
2375
2376         if (isLOOPAES(cd->type))
2377                 return cd->loopaes_cipher_mode;
2378
2379         return NULL;
2380 }
2381
2382 const char *crypt_get_uuid(struct crypt_device *cd)
2383 {
2384         if (isLUKS(cd->type))
2385                 return cd->hdr.uuid;
2386
2387         if (isPLAIN(cd->type))
2388                 return cd->plain_uuid;
2389
2390         if (isLOOPAES(cd->type))
2391                 return cd->loopaes_uuid;
2392
2393         return NULL;
2394 }
2395
2396 const char *crypt_get_device_name(struct crypt_device *cd)
2397 {
2398         return cd->device;
2399 }
2400
2401 int crypt_get_volume_key_size(struct crypt_device *cd)
2402 {
2403         if (isPLAIN(cd->type) && cd->volume_key)
2404                 return cd->volume_key->keylength;
2405
2406         if (isLUKS(cd->type))
2407                 return cd->hdr.keyBytes;
2408
2409         if (isLOOPAES(cd->type))
2410                 return cd->loopaes_key_size;
2411
2412         return 0;
2413 }
2414
2415 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2416 {
2417         if (isPLAIN(cd->type))
2418                 return cd->plain_hdr.offset;
2419
2420         if (isLUKS(cd->type))
2421                 return cd->hdr.payloadOffset;
2422
2423         if (isLOOPAES(cd->type))
2424                 return cd->loopaes_hdr.offset;
2425
2426         return 0;
2427 }
2428
2429 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2430 {
2431         if (!isLUKS(cd->type)) {
2432                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2433                 return CRYPT_SLOT_INVALID;
2434         }
2435
2436         return LUKS_keyslot_info(&cd->hdr, keyslot);
2437 }
2438
2439 int crypt_keyslot_max(const char *type)
2440 {
2441         if (type && isLUKS(type))
2442                 return LUKS_NUMKEYS;
2443
2444         return -EINVAL;
2445 }
2446
2447 const char *crypt_get_type(struct crypt_device *cd)
2448 {
2449         return cd->type;
2450 }
2451
2452 int crypt_get_active_device(struct crypt_device *cd,
2453                             const char *name,
2454                             struct crypt_active_device *cad)
2455 {
2456         int r, readonly;
2457
2458         r = dm_query_device(name, NULL, &cad->size, &cad->iv_offset, &cad->offset,
2459                             NULL, NULL, NULL, &readonly, NULL, NULL);
2460         if (r < 0)
2461                 return r;
2462
2463         cad->flags = readonly ? CRYPT_ACTIVATE_READONLY : 0;
2464
2465         return 0;
2466 }