lib/setup.c

   1 #include <string.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include <fcntl.h>
   6 #include <errno.h>
   7
   8 #include "libcryptsetup.h"
   9 #include "luks.h"
  10 #include "internal.h"
  11
  12 struct crypt_device {
  13         char *type;
  14
  15         char *device;
  16         struct luks_masterkey *volume_key;
  17         uint64_t timeout;
  18         uint64_t iteration_time;
  19         int tries;
  20         int password_verify;
  21
  22         /* used in CRYPT_LUKS1 */
  23         struct luks_phdr hdr;
  24         uint64_t PBKDF2_per_sec;
  25
  26         /* used in CRYPT_PLAIN */
  27         struct crypt_params_plain plain_hdr;
  28         char *plain_cipher;
  29         char *plain_cipher_mode;
  30         char *plain_uuid;
  31
  32         /* callbacks definitions */
  33         void (*log)(int class, const char *msg, void *usrptr);
  34         void *log_usrptr;
  35         int (*confirm)(const char *msg, void *usrptr);
  36         void *confirm_usrptr;
  37         int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
  38         void *password_usrptr;
  39 };
  40
  41 /* Log helper */
  42 static void (*_default_log)(int class, const char *msg, void *usrptr) = NULL;
  43 static int _debug_level = 0;
  44
  45 void crypt_set_debug_level(int level)
  46 {
  47         _debug_level = level;
  48 }
  49
  50 void crypt_log(struct crypt_device *cd, int class, const char *msg)
  51 {
  52         if (cd && cd->log)
  53                 cd->log(class, msg, cd->log_usrptr);
  54         else if (_default_log)
  55                 _default_log(class, msg, NULL);
  56 }
  57
  58 void logger(struct crypt_device *cd, int class, const char *file,
  59             int line, const char *format, ...)
  60 {
  61         va_list argp;
  62         char *target = NULL;
  63
  64         va_start(argp, format);
  65
  66         if (vasprintf(&target, format, argp) > 0) {
  67                 if (class >= 0) {
  68                         crypt_log(cd, class, target);
  69 #ifdef CRYPT_DEBUG
  70                 } else if (_debug_level)
  71                         printf("# %s:%d %s\n", file ?: "?", line, target);
  72 #else
  73                 } else if (_debug_level)
  74                         printf("# %s\n", target);
  75 #endif
  76         }
  77
  78         va_end(argp);
  79         free(target);
  80 }
  81
  82 /*
  83  * Password processing behaviour matrix of process_key
  84  *
  85  * from binary file: check if there is sufficently large key material
  86  * interactive & from fd: hash if requested, otherwise crop or pad with '0'
  87  */
  88 static char *process_key(struct crypt_device *cd, const char *hash_name,
  89                          const char *key_file, size_t key_size,
  90                          const char *pass, size_t passLen)
  91 {
  92         char *key = safe_alloc(key_size);
  93         memset(key, 0, key_size);
  94
  95         /* key is coming from binary file */
  96         if (key_file && strcmp(key_file, "-")) {
  97                 if(passLen < key_size) {
  98                         log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
  99                                 key_size, key_file);
 100                         safe_free(key);
 101                         return NULL;
 102                 }
 103                 memcpy(key, pass, key_size);
 104                 return key;
 105         }
 106
 107         /* key is coming from tty, fd or binary stdin */
 108         if (hash_name) {
 109                 if (hash(NULL, hash_name, key, key_size, pass, passLen) < 0) {
 110                         log_err(cd, _("Key processing error.\n"));
 111                         safe_free(key);
 112                         return NULL;
 113                 }
 114         } else if (passLen > key_size) {
 115                 memcpy(key, pass, key_size);
 116         } else {
 117                 memcpy(key, pass, passLen);
 118         }
 119
 120         return key;
 121 }
 122
 123 int parse_into_name_and_mode(const char *nameAndMode, char *name, char *mode)
 124 {
 125 /* Token content stringification, see info cpp/stringification */
 126 #define str(s) #s
 127 #define xstr(s) str(s)
 128 #define scanpattern1 "%" xstr(LUKS_CIPHERNAME_L) "[^-]-%" xstr(LUKS_CIPHERMODE_L)  "s"
 129 #define scanpattern2 "%" xstr(LUKS_CIPHERNAME_L) "[^-]"
 130
 131         int r;
 132
 133         if(sscanf(nameAndMode,scanpattern1, name, mode) != 2) {
 134                 if((r = sscanf(nameAndMode,scanpattern2,name)) == 1)
 135                         strncpy(mode,"cbc-plain",10);
 136                 else
 137                         return -EINVAL;
 138         }
 139
 140         return 0;
 141
 142 #undef scanpattern1
 143 #undef scanpattern2
 144 #undef str
 145 #undef xstr
 146 }
 147
 148 static int isPLAIN(const char *type)
 149 {
 150         return (type && !strcmp(CRYPT_PLAIN, type));
 151 }
 152
 153 static int isLUKS(const char *type)
 154 {
 155         return (type && !strcmp(CRYPT_LUKS1, type));
 156 }
 157
 158 /* keyslot helpers */
 159 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 160 {
 161         if (*keyslot == CRYPT_ANY_SLOT) {
 162                 *keyslot = LUKS_keyslot_find_empty(&cd->hdr);
 163                 if (*keyslot < 0) {
 164                         log_err(cd, _("All key slots full.\n"));
 165                         return -EINVAL;
 166                 }
 167         }
 168
 169         switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
 170                 case SLOT_INVALID:
 171                         log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 172                                 *keyslot, LUKS_NUMKEYS - 1);
 173                         return -EINVAL;
 174                 case SLOT_INACTIVE:
 175                         break;
 176                 default:
 177                         log_err(cd, _("Key slot %d is full, please select another one.\n"),
 178                                 *keyslot);
 179                         return -EINVAL;
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int verify_other_keyslot(struct crypt_device *cd,
 186                                 const char *key_file,
 187                                 unsigned int flags,
 188                                 int keyIndex)
 189 {
 190         struct luks_masterkey *mk;
 191         crypt_keyslot_info ki;
 192         int openedIndex;
 193         char *password = NULL;
 194         unsigned int passwordLen;
 195
 196         get_key(_("Enter any remaining LUKS passphrase: "), &password,
 197                 &passwordLen, 0, key_file, cd->timeout, flags, cd);
 198         if(!password)
 199                 return -EINVAL;
 200
 201         ki = crypt_keyslot_status(cd, keyIndex);
 202         if (ki == SLOT_ACTIVE) /* Not last slot */
 203                 LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
 204
 205         openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
 206                                              password, passwordLen,
 207                                              &cd->hdr, &mk, cd);
 208
 209         if (ki == SLOT_ACTIVE)
 210                 LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
 211         LUKS_dealloc_masterkey(mk);
 212         safe_free(password);
 213
 214         if (openedIndex < 0)
 215                 return -EPERM;
 216
 217         log_std(cd, _("Key slot %d verified.\n"), openedIndex);
 218         return 0;
 219 }
 220
 221 static int find_keyslot_by_passphrase(struct crypt_device *cd,
 222                                       const char *key_file,
 223                                       unsigned int flags,
 224                                       char *message)
 225 {
 226         struct luks_masterkey *mk;
 227         char *password = NULL;
 228         unsigned int passwordLen;
 229         int keyIndex;
 230
 231         get_key(message,&password,&passwordLen, 0, key_file,
 232                 cd->timeout, flags, cd);
 233         if(!password)
 234                 return -EINVAL;
 235
 236         keyIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
 237                                           passwordLen, &cd->hdr, &mk, cd);
 238         LUKS_dealloc_masterkey(mk);
 239         safe_free(password);
 240
 241         return keyIndex;
 242 }
 243
 244 static int device_check_and_adjust(struct crypt_device *cd,
 245                                    const char *device,
 246                                    uint64_t *size, uint64_t *offset,
 247                                    int *read_only)
 248 {
 249         struct device_infos infos;
 250
 251         if (get_device_infos(device, &infos, cd) < 0) {
 252                 log_err(cd, _("Cannot get info about device %s.\n"), device);
 253                 return -ENOTBLK;
 254         }
 255
 256         if (!*size) {
 257                 *size = infos.size;
 258                 if (!*size) {
 259                         log_err(cd, _("Device %s has zero size.\n"), device);
 260                         return -ENOTBLK;
 261                 }
 262                 if (*size <= *offset) {
 263                         log_err(cd, _("Device %s is too small.\n"), device);
 264                         return -EINVAL;
 265                 }
 266                 *size -= *offset;
 267         }
 268
 269         if (infos.readonly)
 270                 *read_only = 1;
 271
 272         log_dbg("Calculated device size is %" PRIu64 " sectors (%s), offset %" PRIu64 ".",
 273                 *size, *read_only ? "RO" : "RW", *offset);
 274         return 0;
 275 }
 276
 277 static int luks_remove_helper(struct crypt_device *cd,
 278                               int key_slot,
 279                               const char *other_key_file,
 280                               const char *key_file,
 281                               int verify)
 282 {
 283         crypt_keyslot_info ki;
 284         int r = -EINVAL;
 285
 286         if (key_slot == CRYPT_ANY_SLOT) {
 287                 key_slot = find_keyslot_by_passphrase(cd, key_file, 0,
 288                                 _("Enter LUKS passphrase to be deleted: "));
 289                 if(key_slot < 0) {
 290                         r = -EPERM;
 291                         goto out;
 292                 }
 293
 294                 log_std(cd, _("key slot %d selected for deletion.\n"), key_slot);
 295         }
 296
 297         ki = crypt_keyslot_status(cd, key_slot);
 298         if (ki == SLOT_INVALID) {
 299                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 300                         key_slot, LUKS_NUMKEYS - 1);
 301                 r = -EINVAL;
 302                 goto out;
 303         }
 304         if (ki <= SLOT_INACTIVE) {
 305                 log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
 306                 r = -EINVAL;
 307                 goto out;
 308         }
 309
 310         if (ki == SLOT_ACTIVE_LAST && cd->confirm &&
 311             !(cd->confirm(_("This is the last keyslot."
 312                             " Device will become unusable after purging this key."),
 313                          cd->confirm_usrptr))) {
 314                 r = -EINVAL;
 315                 goto out;
 316         }
 317
 318         if(verify)
 319                 r = verify_other_keyslot(cd, other_key_file, 0, key_slot);
 320         else
 321                 r = 0;
 322
 323         if (!r)
 324                 r = crypt_keyslot_destroy(cd, key_slot);
 325 out:
 326         return (r < 0) ? r : 0;
 327 }
 328
 329 static int create_device_helper(struct crypt_device *cd,
 330                                 const char *name,
 331                                 const char *hash,
 332                                 const char *cipher,
 333                                 const char *cipher_mode,
 334                                 const char *key_file,
 335                                 const char *key,
 336                                 unsigned int keyLen,
 337                                 int key_size,
 338                                 uint64_t size,
 339                                 uint64_t skip,
 340                                 uint64_t offset,
 341                                 const char *uuid,
 342                                 int read_only,
 343                                 unsigned int flags,
 344                                 int reload)
 345 {
 346         crypt_status_info ci;
 347         char *dm_cipher = NULL;
 348         char *processed_key = NULL;
 349         int r;
 350
 351         ci = crypt_status(cd, name);
 352         if (ci == INVALID)
 353                 return -EINVAL;
 354
 355         if (reload && ci < ACTIVE)
 356                 return -EINVAL;
 357
 358         if (!reload && ci >= ACTIVE) {
 359                 log_err(cd, _("Device %s already exists.\n"), name);
 360                 return -EEXIST;
 361         }
 362
 363         if (key_size < 0 || key_size > 1024) {
 364                 log_err(cd, _("Invalid key size %d.\n"), key_size);
 365                 return -EINVAL;
 366         }
 367
 368         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 369         if (r)
 370                 return r;
 371
 372         if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
 373                 return -ENOMEM;
 374
 375         processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
 376         if (!processed_key)
 377                 return -ENOENT;
 378
 379         r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
 380                              key_size, processed_key, read_only, reload);
 381
 382         free(dm_cipher);
 383         safe_free(processed_key);
 384         return r;
 385 }
 386
 387 static int open_from_hdr_and_mk(struct crypt_device *cd,
 388                                 struct luks_masterkey *mk,
 389                                 const char *name,
 390                                 uint32_t flags)
 391 {
 392         uint64_t size, offset;
 393         char *cipher;
 394         int read_only, no_uuid, r;
 395
 396         size = 0;
 397         offset = crypt_get_data_offset(cd);
 398         read_only = flags & CRYPT_ACTIVATE_READONLY;
 399         no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
 400
 401         r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
 402         if (r)
 403                 return r;
 404
 405         if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
 406                      crypt_get_cipher_mode(cd)) < 0)
 407                 r = -ENOMEM;
 408         else
 409                 r = dm_create_device(name, cd->device, cipher, cd->type,
 410                                      no_uuid ? NULL : crypt_get_uuid(cd),
 411                                      size, 0, offset, mk->keyLength, mk->key,
 412                                      read_only, 0);
 413         free(cipher);
 414         return r;
 415 }
 416
 417 static void log_wrapper(int class, const char *msg, void *usrptr)
 418 {
 419         void (*xlog)(int class, char *msg) = usrptr;
 420         xlog(class, (char *)msg);
 421 }
 422
 423 static int yesDialog_wrapper(const char *msg, void *usrptr)
 424 {
 425         int (*xyesDialog)(char *msg) = usrptr;
 426         return xyesDialog((char*)msg);
 427 }
 428
 429 int crypt_confirm(struct crypt_device *cd, const char *msg)
 430 {
 431         if (!cd || !cd->confirm)
 432                 return 1;
 433         else
 434                 return cd->confirm(msg, cd->confirm_usrptr);
 435 }
 436
 437 static void key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 438                               unsigned int *key_len, int force_verify)
 439 {
 440         int r, flags = 0;
 441
 442         if (cd->password) {
 443                 *key = safe_alloc(MAX_TTY_PASSWORD_LEN);
 444                 if (*key)
 445                         return;
 446                 r = cd->password(msg, *key, (size_t)key_len, cd->password_usrptr);
 447                 if (r < 0) {
 448                         safe_free(*key);
 449                         *key = NULL;
 450                 } else
 451                         *key_len = r;
 452         } else {
 453                 if (force_verify || cd->password_verify)
 454                         flags |= CRYPT_FLAG_VERIFY_IF_POSSIBLE;
 455                 get_key(msg, key, key_len, 0, NULL, cd->timeout, flags, cd);
 456         }
 457 }
 458
 459 static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
 460                                              struct luks_masterkey **mk)
 461 {
 462         char *prompt = NULL, *passphrase_read = NULL;
 463         unsigned int passphrase_size_read;
 464         int r = -EINVAL, tries = cd->tries;
 465
 466         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
 467                 return -ENOMEM;
 468
 469         *mk = NULL;
 470         do {
 471                 if (*mk)
 472                         LUKS_dealloc_masterkey(*mk);
 473                 *mk = NULL;
 474
 475                 key_from_terminal(cd, prompt, &passphrase_read,
 476                                   &passphrase_size_read, 0);
 477                 if(!passphrase_read) {
 478                         r = -EINVAL;
 479                         break;
 480                 }
 481
 482                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
 483                                            passphrase_size_read, &cd->hdr, mk, cd);
 484                 safe_free(passphrase_read);
 485                 passphrase_read = NULL;
 486         } while (r == -EPERM && (--tries > 0));
 487
 488         if (r < 0 && *mk) {
 489                 LUKS_dealloc_masterkey(*mk);
 490                 *mk = NULL;
 491         }
 492         free(prompt);
 493
 494         return r;
 495
 496 }
 497
 498 static void key_from_file(struct crypt_device *cd, char *msg,
 499                           char **key, unsigned int *key_len,
 500                           const char *key_file, size_t key_size)
 501 {
 502         get_key(msg, key, key_len, key_size, key_file, cd->timeout, 0, cd);
 503 }
 504
 505 static int _crypt_init(struct crypt_device **cd,
 506                        const char *type,
 507                        struct crypt_options *options,
 508                        int load, int need_dm)
 509 {
 510         int init_by_name, r;
 511
 512         /* if it is plain device and mapping table is being reloaded
 513         initialize it by name*/
 514         init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
 515
 516         /* Some of old API calls do not require DM in kernel,
 517            fake initialisation by initialise it with kernel_check disabled */
 518         if (!need_dm)
 519                 (void)dm_init(NULL, 0);
 520         if (init_by_name)
 521                 r = crypt_init_by_name(cd, options->name);
 522         else
 523                 r = crypt_init(cd, options->device);
 524         if (!need_dm)
 525                 dm_exit();
 526
 527         if (r)
 528                 return -EINVAL;
 529
 530         crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
 531         crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
 532
 533         crypt_set_timeout(*cd, options->timeout);
 534         crypt_set_password_retry(*cd, options->tries);
 535         crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
 536         crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
 537
 538         if (load && !init_by_name)
 539                 r = crypt_load(*cd, type, NULL);
 540
 541         if (!r && type && !(*cd)->type) {
 542                 (*cd)->type = strdup(type);
 543                 if (!(*cd)->type)
 544                         r = -ENOMEM;
 545         }
 546
 547         if (r)
 548                 crypt_free(*cd);
 549
 550         return r;
 551 }
 552
 553 void crypt_set_log_callback(struct crypt_device *cd,
 554         void (*log)(int class, const char *msg, void *usrptr),
 555         void *usrptr)
 556 {
 557         if (!cd)
 558                 _default_log = log;
 559         else {
 560                 cd->log = log;
 561                 cd->log_usrptr = usrptr;
 562         }
 563 }
 564
 565 void crypt_set_confirm_callback(struct crypt_device *cd,
 566         int (*confirm)(const char *msg, void *usrptr),
 567         void *usrptr)
 568 {
 569         cd->confirm = confirm;
 570         cd->confirm_usrptr = usrptr;
 571 }
 572
 573 void crypt_set_password_callback(struct crypt_device *cd,
 574         int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
 575         void *usrptr)
 576 {
 577         cd->password = password;
 578         cd->password_usrptr = usrptr;
 579 }
 580
 581 /* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
 582  *          offset, size, skip, timeout, tries, passphrase_fd (ignored),
 583  *          flags, icb */
 584 int crypt_create_device(struct crypt_options *options)
 585 {
 586         struct crypt_device *cd = NULL;
 587         char *key = NULL;
 588         unsigned int keyLen;
 589         int r;
 590
 591         r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
 592         if (r)
 593                 return r;
 594
 595         get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 596                 options->key_file, cd->timeout, options->flags, cd);
 597         if (!key)
 598                 r = -ENOENT;
 599         else
 600                 r = create_device_helper(cd, options->name, options->hash,
 601                         options->cipher, NULL, options->key_file, key, keyLen,
 602                         options->key_size, options->size, options->skip,
 603                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 604                         options->flags, 0);
 605
 606         safe_free(key);
 607         crypt_free(cd);
 608         return r;
 609 }
 610
 611 /* OPTIONS: same as create above */
 612 int crypt_update_device(struct crypt_options *options)
 613 {
 614         struct crypt_device *cd = NULL;
 615         char *key = NULL;
 616         unsigned int keyLen;
 617         int r;
 618
 619         r = _crypt_init(&cd, CRYPT_PLAIN, options, 1, 1);
 620         if (r)
 621                 return r;
 622
 623         get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
 624                 options->key_file, cd->timeout, options->flags, cd);
 625         if (!key)
 626                 r = -ENOENT;
 627         else
 628                 r = create_device_helper(cd, options->name, options->hash,
 629                         options->cipher, NULL, options->key_file, key, keyLen,
 630                         options->key_size, options->size, options->skip,
 631                         options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
 632                         options->flags, 1);
 633
 634         safe_free(key);
 635         crypt_free(cd);
 636         return r;
 637 }
 638
 639 /* OPTIONS: name, size, icb */
 640 int crypt_resize_device(struct crypt_options *options)
 641 {
 642         struct crypt_device *cd = NULL;
 643         char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
 644         char *type = NULL;
 645         uint64_t size, skip, offset;
 646         int key_size, read_only, r;
 647
 648         log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
 649
 650         if (dm_init(NULL, 1) < 0)
 651                 return -ENOSYS;
 652
 653         r = dm_query_device(options->name, &device, &size, &skip, &offset,
 654                             &cipher, &key_size, &key, &read_only, NULL, &uuid);
 655         if (r < 0) {
 656                 log_err(NULL, _("Device %s is not active.\n"), options->name);
 657                 goto out;
 658         }
 659
 660         /* Try to determine type of device from UUID */
 661         type = CRYPT_PLAIN;
 662         if (uuid) {
 663                 if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
 664                         type = CRYPT_PLAIN;
 665                         free (uuid);
 666                         uuid = NULL;
 667                 } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
 668                         type = CRYPT_LUKS1;
 669         }
 670
 671         if (!options->device)
 672                 options->device = device;
 673
 674         r = _crypt_init(&cd, type, options, 1, 1);
 675         if (r)
 676                 goto out;
 677
 678         size = options->size;
 679         r = device_check_and_adjust(cd, device, &size, &offset, &read_only);
 680         if (r)
 681                 goto out;
 682
 683         r = dm_create_device(options->name, device, cipher, type,
 684                              crypt_get_uuid(cd), size, skip, offset,
 685                              key_size, key, read_only, 1);
 686 out:
 687         safe_free(key);
 688         free(cipher);
 689         if (options->device == device)
 690                 options->device = NULL;
 691         free(device);
 692         free(uuid);
 693         crypt_free(cd);
 694         dm_exit();
 695         return r;
 696 }
 697
 698 /* OPTIONS: name, icb */
 699 int crypt_query_device(struct crypt_options *options)
 700 {
 701         int read_only, r;
 702
 703         log_dbg("Query device %s.", options->name);
 704
 705         if (dm_init(NULL, 1) < 0)
 706                 return -ENOSYS;
 707
 708         r = dm_status_device(options->name);
 709         if (r == -ENODEV) {
 710                 dm_exit();
 711                 return 0;
 712         }
 713
 714         r = dm_query_device(options->name, (char **)&options->device, &options->size,
 715                             &options->skip, &options->offset, (char **)&options->cipher,
 716                             &options->key_size, NULL, &read_only, NULL, NULL);
 717
 718         dm_exit();
 719         if (r < 0)
 720                 return r;
 721
 722         if (read_only)
 723                 options->flags |= CRYPT_FLAG_READONLY;
 724
 725         options->flags |= CRYPT_FLAG_FREE_DEVICE;
 726         options->flags |= CRYPT_FLAG_FREE_CIPHER;
 727
 728         return 1;
 729 }
 730
 731 /* OPTIONS: name, icb */
 732 int crypt_remove_device(struct crypt_options *options)
 733 {
 734         struct crypt_device *cd = NULL;
 735         int r;
 736
 737         r = crypt_init_by_name(&cd, options->name);
 738         if (r)
 739                 return r;
 740
 741         r = crypt_deactivate(cd, options->name);
 742
 743         crypt_free(cd);
 744         return r;
 745
 746 }
 747
 748 /* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
 749  *          new_key_file, iteration_time, timeout, flags, icb */
 750 int crypt_luksFormat(struct crypt_options *options)
 751 {
 752         char cipherName[LUKS_CIPHERNAME_L];
 753         char cipherMode[LUKS_CIPHERMODE_L];
 754         char *password=NULL;
 755         unsigned int passwordLen;
 756         struct crypt_device *cd;
 757         struct crypt_params_luks1 cp = {
 758                 .hash = options->hash,
 759                 .data_alignment = options->align_payload
 760         };
 761         int r;
 762
 763         r = parse_into_name_and_mode(options->cipher, cipherName, cipherMode);
 764         if(r < 0) {
 765                 log_err(cd, _("No known cipher specification pattern detected.\n"));
 766                 return r;
 767         }
 768
 769         if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
 770                 return r;
 771
 772         if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
 773                 log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 774                         options->key_slot, LUKS_NUMKEYS - 1);
 775                 r = -EINVAL;
 776                 goto out;
 777         }
 778
 779         get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
 780                 options->new_key_file, options->timeout, options->flags, cd);
 781
 782         if(!password) {
 783                 r = -EINVAL;
 784                 goto out;
 785         }
 786
 787         r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
 788                          NULL, NULL, options->key_size, &cp);
 789         if (r < 0)
 790                 goto out;
 791
 792         /* Add keyslot using internally stored volume key generated during format */
 793         r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
 794                                             password, passwordLen);
 795 out:
 796         crypt_free(cd);
 797         safe_free(password);
 798         return (r < 0) ? r : 0;
 799 }
 800
 801 /* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
 802 int crypt_luksOpen(struct crypt_options *options)
 803 {
 804         struct crypt_device *cd = NULL;
 805         uint32_t flags = 0;
 806         int r;
 807
 808         if (!options->name)
 809                 return -EINVAL;
 810
 811         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 812         if (r)
 813                 return r;
 814
 815         if (options->flags & CRYPT_FLAG_READONLY)
 816                 flags |= CRYPT_ACTIVATE_READONLY;
 817
 818         if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
 819                 flags |= CRYPT_ACTIVATE_NO_UUID;
 820
 821         if (options->key_file)
 822                 r = crypt_activate_by_keyfile(cd, options->name,
 823                         CRYPT_ANY_SLOT, options->key_file, options->key_size,
 824                         flags);
 825         else
 826                 r = crypt_activate_by_passphrase(cd, options->name,
 827                         CRYPT_ANY_SLOT, options->passphrase,
 828                         options->passphrase ? strlen(options->passphrase) : 0,
 829                         flags);
 830
 831         crypt_free(cd);
 832         return (r < 0) ? r : 0;
 833 }
 834
 835 /* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
 836 int crypt_luksKillSlot(struct crypt_options *options)
 837 {
 838         struct crypt_device *cd = NULL;
 839         int r;
 840
 841         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 842         if (r)
 843                 return r;
 844
 845         r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
 846                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 847
 848         crypt_free(cd);
 849         return (r < 0) ? r : 0;
 850 }
 851
 852 /* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
 853 int crypt_luksRemoveKey(struct crypt_options *options)
 854 {
 855         struct crypt_device *cd = NULL;
 856         int r;
 857
 858         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 859         if (r)
 860                 return r;
 861
 862         r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
 863                                options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
 864
 865         crypt_free(cd);
 866         return (r < 0) ? r : 0;
 867 }
 868
 869
 870 /* OPTIONS: device, new_key_file, key_file, key_slot, flags,
 871             iteration_time, timeout, icb */
 872 int crypt_luksAddKey(struct crypt_options *options)
 873 {
 874         struct crypt_device *cd = NULL;
 875         int r = -EINVAL;
 876
 877         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
 878         if (r)
 879                 return r;
 880
 881         if (options->key_file || options->new_key_file)
 882                 r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
 883                                                  options->key_file, 0,
 884                                                  options->new_key_file, 0);
 885         else
 886                 r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
 887                                                     NULL, 0, NULL, 0);
 888
 889         crypt_free(cd);
 890         return (r < 0) ? r : 0;
 891 }
 892
 893 /* OPTIONS: device, icb */
 894 int crypt_luksUUID(struct crypt_options *options)
 895 {
 896         struct crypt_device *cd = NULL;
 897         char *uuid;
 898         int r;
 899
 900         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 901         if (r)
 902                 return r;
 903
 904         uuid = (char *)crypt_get_uuid(cd);
 905         log_std(cd, uuid ?: "");
 906         log_std(cd, "\n");
 907         crypt_free(cd);
 908         return 0;
 909 }
 910
 911 /* OPTIONS: device, icb */
 912 int crypt_isLuks(struct crypt_options *options)
 913 {
 914         struct crypt_device *cd = NULL;
 915         int r;
 916
 917         log_dbg("Check device %s for LUKS header.", options->device);
 918
 919         r = crypt_init(&cd, options->device);
 920         if (r < 0)
 921                 return -EINVAL;
 922
 923         /* Do print fail here, no need to crypt_load() */
 924         r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
 925
 926         crypt_free(cd);
 927         return r;
 928 }
 929
 930 /* OPTIONS: device, icb */
 931 int crypt_luksDump(struct crypt_options *options)
 932 {
 933         struct crypt_device *cd = NULL;
 934         int r;
 935
 936         r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
 937         if(r < 0)
 938                 return r;
 939
 940         r = crypt_dump(cd);
 941
 942         crypt_free(cd);
 943         return 0;
 944 }
 945
 946 void crypt_get_error(char *buf, size_t size)
 947 {
 948         const char *error = get_error();
 949
 950         if (!buf || size < 1)
 951                 set_error(NULL);
 952         else if (error) {
 953                 strncpy(buf, error, size - 1);
 954                 buf[size - 1] = '\0';
 955                 set_error(NULL);
 956         } else
 957                 buf[0] = '\0';
 958 }
 959
 960 void crypt_put_options(struct crypt_options *options)
 961 {
 962         if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
 963                 free((char *)options->device);
 964                 options->device = NULL;
 965                 options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
 966         }
 967         if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
 968                 free((char *)options->cipher);
 969                 options->cipher = NULL;
 970                 options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
 971         }
 972 }
 973
 974 const char *crypt_get_dir(void)
 975 {
 976         return dm_get_dir();
 977 }
 978
 979 /////////////////////////////////
 980 //
 981 // New API
 982 //
 983
 984 int crypt_init(struct crypt_device **cd, const char *device)
 985 {
 986         struct crypt_device *h = NULL;
 987
 988         if (!cd)
 989                 return -EINVAL;
 990
 991         log_dbg("Allocating crypt device %s context.", device);
 992
 993         if (!device_ready(NULL, device, O_RDONLY))
 994                 return -ENOTBLK;
 995
 996         if (!(h = malloc(sizeof(struct crypt_device))))
 997                 return -ENOMEM;
 998
 999         memset(h, 0, sizeof(*h));
1000
1001         h->device = strdup(device);
1002         if (!h->device) {
1003                 free(h);
1004                 return -ENOMEM;
1005         }
1006
1007         if (dm_init(h, 1) < 0) {
1008                 free(h);
1009                 return -ENOSYS;
1010         }
1011
1012         h->iteration_time = 1000;
1013         h->password_verify = 0;
1014         h->tries = 3;
1015         *cd = h;
1016         return 0;
1017 }
1018
1019 int crypt_init_by_name(struct crypt_device **cd, const char *name)
1020 {
1021         crypt_status_info ci;
1022         char *device = NULL;
1023         int r;
1024
1025         log_dbg("Allocating crypt device context by device %s.", name);
1026
1027         ci = crypt_status(NULL, name);
1028         if (ci == INVALID)
1029                 return -ENODEV;
1030
1031         if (ci < ACTIVE) {
1032                 log_err(NULL, _("Device %s is not active.\n"), name);
1033                 return -ENODEV;
1034         }
1035
1036         r = dm_query_device(name, &device, NULL, NULL, NULL,
1037                             NULL, NULL, NULL, NULL, NULL, NULL);
1038         if (r >= 0)
1039                 r = crypt_init(cd, device);
1040
1041         free(device);
1042         return r;
1043 }
1044
1045 static int _crypt_format_plain(struct crypt_device *cd,
1046                                const char *cipher,
1047                                const char *cipher_mode,
1048                                const char *uuid,
1049                                struct crypt_params_plain *params)
1050 {
1051         if (!cipher || !cipher_mode || !params || !params->hash) {
1052                 log_err(cd, _("Invalid plain crypt parameters.\n"));
1053                 return -EINVAL;
1054         }
1055
1056         if (cd->volume_key->keyLength > 1024) {
1057                 log_err(cd, _("Invalid key size.\n"));
1058                 return -EINVAL;
1059         }
1060
1061         cd->plain_cipher = strdup(cipher);
1062         cd->plain_cipher_mode = strdup(cipher_mode);
1063
1064         if (uuid)
1065                 cd->plain_uuid = strdup(uuid);
1066
1067         if (params->hash)
1068                 cd->plain_hdr.hash = strdup(params->hash);
1069
1070         cd->plain_hdr.offset = params->offset;
1071         cd->plain_hdr.skip = params->skip;
1072
1073         if ((params->hash && !cd->plain_hdr.hash) ||
1074             !cd->plain_cipher || !cd->plain_cipher_mode)
1075                 return -ENOMEM;
1076
1077         return 0;
1078 }
1079
1080 static int _crypt_format_luks1(struct crypt_device *cd,
1081                                const char *cipher,
1082                                const char *cipher_mode,
1083                                const char *uuid,
1084                                struct crypt_params_luks1 *params)
1085 {
1086         int r;
1087
1088         r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
1089                                (params && params->hash) ? params->hash : "sha1",
1090                                uuid, LUKS_STRIPES,
1091                                params ? params->data_alignment: DEFAULT_ALIGNMENT, cd);
1092         if(r < 0)
1093                 return r;
1094
1095         /* Wipe first 8 sectors - fs magic numbers etc. */
1096         r = wipe_device_header(cd->device, 8);
1097         if(r < 0) {
1098                 log_err(cd, _("Can't wipe header on device %s.\n"), cd->device);
1099                 return r;
1100         }
1101
1102         r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
1103
1104         return r;
1105 }
1106
1107 int crypt_format(struct crypt_device *cd,
1108         const char *type,
1109         const char *cipher,
1110         const char *cipher_mode,
1111         const char *uuid,
1112         const char *volume_key,
1113         size_t volume_key_size,
1114         void *params)
1115 {
1116         int r;
1117
1118         log_dbg("Formatting device %s as type %s.", cd->device, cd->type ?: "(none)");
1119
1120         if (!type)
1121                 return -EINVAL;
1122
1123         if (volume_key)
1124                 cd->volume_key = LUKS_alloc_masterkey(volume_key_size,
1125                                                       volume_key);
1126         else
1127                 cd->volume_key = LUKS_generate_masterkey(volume_key_size);
1128
1129         if(!cd->volume_key)
1130                 return -ENOMEM;
1131
1132         if (isPLAIN(type))
1133                 r = _crypt_format_plain(cd, cipher, cipher_mode,
1134                                         uuid, params);
1135         else if (isLUKS(type))
1136                 r = _crypt_format_luks1(cd, cipher, cipher_mode,
1137                                         uuid, params);
1138         else {
1139                 /* FIXME: allow plugins here? */
1140                 log_err(cd, _("Unkown crypt device type %s requesed.\n"), type);
1141                 r = -EINVAL;
1142         }
1143
1144         if (!r && !(cd->type = strdup(type)))
1145                 r = -ENOMEM;
1146
1147         if (r < 0) {
1148                 LUKS_dealloc_masterkey(cd->volume_key);
1149                 cd->volume_key = NULL;
1150         }
1151
1152         return r;
1153 }
1154
1155 int crypt_load(struct crypt_device *cd,
1156                const char *requested_type,
1157                void *params)
1158 {
1159         struct luks_phdr hdr;
1160         int r;
1161
1162         log_dbg("Trying to load %s crypt type from device %s.",
1163                 requested_type ?: "any", cd->device);
1164
1165         if (requested_type && !isPLAIN(requested_type) && !isLUKS(requested_type))
1166                 return -EINVAL;
1167
1168         /* Some hash functions need initialized gcrypt library */
1169         if (init_crypto()) {
1170                 log_err(cd, _("Cannot initialize crypto backend.\n"));
1171                 return -ENOSYS;
1172         }
1173
1174         r = LUKS_read_phdr(cd->device, &hdr, 0, cd);
1175
1176         if (!r) {
1177                 memcpy(&cd->hdr, &hdr, sizeof(hdr));
1178                 cd->type = strdup(requested_type);
1179                 if (!cd->type)
1180                         r = -ENOMEM;
1181         }
1182
1183         return r;
1184 }
1185
1186 int crypt_header_backup(struct crypt_device *cd,
1187                         const char *requested_type,
1188                         const char *backup_file)
1189 {
1190         if ((requested_type && !isLUKS(requested_type)) || !backup_file)
1191                 return -EINVAL;
1192
1193         log_dbg("Requested header backup of device %s (%s) to "
1194                 "file %s.", cd->device, requested_type, backup_file);
1195
1196         return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
1197 }
1198
1199 int crypt_header_restore(struct crypt_device *cd,
1200                          const char *requested_type,
1201                          const char *backup_file)
1202 {
1203         if (requested_type && !isLUKS(requested_type))
1204                 return -EINVAL;
1205
1206         log_dbg("Requested header restore to device %s (%s) from "
1207                 "file %s.", cd->device, requested_type, backup_file);
1208
1209         return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
1210 }
1211
1212 void crypt_free(struct crypt_device *cd)
1213 {
1214         if (cd) {
1215                 log_dbg("Releasing crypt device %s context.", cd->device);
1216
1217                 dm_exit();
1218                 if (cd->volume_key)
1219                         LUKS_dealloc_masterkey(cd->volume_key);
1220
1221                 free(cd->device);
1222                 free(cd->type);
1223
1224                 /* used in plain device only */
1225                 free((char*)cd->plain_hdr.hash);
1226                 free(cd->plain_cipher);
1227                 free(cd->plain_cipher_mode);
1228                 free(cd->plain_uuid);
1229
1230                 free(cd);
1231         }
1232 }
1233
1234 int crypt_suspend(struct crypt_device *cd,
1235                   const char *name)
1236 {
1237         crypt_status_info ci;
1238         int r, suspended = 0;
1239
1240         log_dbg("Suspending volume %s.", name);
1241
1242         ci = crypt_status(NULL, name);
1243         if (ci < ACTIVE) {
1244                 log_err(cd, _("Volume %s is not active.\n"), name);
1245                 return -EINVAL;
1246         }
1247
1248         if (!cd && dm_init(NULL, 1) < 0)
1249                 return -ENOSYS;
1250
1251         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1252                             NULL, NULL, NULL, NULL, &suspended, NULL);
1253         if (r < 0)
1254                 goto out;
1255
1256         if (suspended) {
1257                 log_err(cd, _("Volume %s is already suspended.\n"), name);
1258                 r = -EINVAL;
1259                 goto out;
1260         }
1261
1262         r = dm_suspend_and_wipe_key(name);
1263         if (r)
1264                 log_err(cd, "Error during suspending device %s.\n", name);
1265 out:
1266         if (!cd)
1267                 dm_exit();
1268         return r;
1269 }
1270
1271 int crypt_resume_by_passphrase(struct crypt_device *cd,
1272                                const char *name,
1273                                int keyslot,
1274                                const char *passphrase,
1275                                size_t passphrase_size)
1276 {
1277         struct luks_masterkey *mk = NULL;
1278         int r, suspended = 0;
1279
1280         log_dbg("Resuming volume %s.", name);
1281
1282         if (!isLUKS(cd->type)) {
1283                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1284                 r = -EINVAL;
1285                 goto out;
1286         }
1287
1288         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1289                             NULL, NULL, NULL, NULL, &suspended, NULL);
1290         if (r < 0)
1291                 return r;
1292
1293         if (!suspended) {
1294                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1295                 return -EINVAL;
1296         }
1297
1298         if (passphrase) {
1299                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1300                                            passphrase_size, &cd->hdr, &mk, cd);
1301         } else
1302                 r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
1303
1304         if (r >= 0) {
1305                 keyslot = r;
1306                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1307                 if (r)
1308                         log_err(cd, "Error during resuming device %s.\n", name);
1309         } else
1310                 r = keyslot;
1311 out:
1312         LUKS_dealloc_masterkey(mk);
1313         return r < 0 ? r : keyslot;
1314 }
1315
1316 int crypt_resume_by_keyfile(struct crypt_device *cd,
1317                             const char *name,
1318                             int keyslot,
1319                             const char *keyfile,
1320                             size_t keyfile_size)
1321 {
1322         struct luks_masterkey *mk = NULL;
1323         char *passphrase_read = NULL;
1324         unsigned int passphrase_size_read;
1325         int r, suspended = 0;
1326
1327         log_dbg("Resuming volume %s.", name);
1328
1329         if (!isLUKS(cd->type)) {
1330                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1331                 r = -EINVAL;
1332                 goto out;
1333         }
1334
1335         r = dm_query_device(name, NULL, NULL, NULL, NULL,
1336                             NULL, NULL, NULL, NULL, &suspended, NULL);
1337         if (r < 0)
1338                 return r;
1339
1340         if (!suspended) {
1341                 log_err(cd, _("Volume %s is not suspended.\n"), name);
1342                 return -EINVAL;
1343         }
1344
1345         if (!keyfile)
1346                 return -EINVAL;
1347
1348         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1349                       &passphrase_size_read, keyfile, keyfile_size);
1350
1351         if(!passphrase_read)
1352                 r = -EINVAL;
1353         else {
1354                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1355                                            passphrase_size_read, &cd->hdr, &mk, cd);
1356                 safe_free(passphrase_read);
1357         }
1358
1359         if (r >= 0) {
1360                 keyslot = r;
1361                 r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
1362                 if (r)
1363                         log_err(cd, "Error during resuming device %s.\n", name);
1364         } else
1365                 r = keyslot;
1366 out:
1367         LUKS_dealloc_masterkey(mk);
1368         return r < 0 ? r : keyslot;
1369 }
1370
1371 // slot manipulation
1372 int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
1373         int keyslot, // -1 any
1374         const char *passphrase, // NULL -> terminal
1375         size_t passphrase_size,
1376         const char *new_passphrase, // NULL -> terminal
1377         size_t new_passphrase_size)
1378 {
1379         struct luks_masterkey *mk = NULL;
1380         char *password = NULL, *new_password = NULL;
1381         unsigned int passwordLen, new_passwordLen;
1382         int r;
1383
1384         log_dbg("Adding new keyslot, existing passphrase %sprovided,"
1385                 "new passphrase %sprovided.",
1386                 passphrase ? "" : "not ", new_passphrase  ? "" : "not ");
1387
1388         if (!isLUKS(cd->type)) {
1389                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1390                 return -EINVAL;
1391         }
1392
1393         r = keyslot_verify_or_find_empty(cd, &keyslot);
1394         if (r)
1395                 return r;
1396
1397         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1398                 /* No slots used, try to use pre-generated key in header */
1399                 if (cd->volume_key) {
1400                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1401                         r = mk ? 0 : -ENOMEM;
1402                 } else {
1403                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1404                         return -EINVAL;
1405                 }
1406         } else if (passphrase) {
1407                 /* Passphrase provided, use it to unlock existing keyslot */
1408                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
1409                                            passphrase_size, &cd->hdr, &mk, cd);
1410         } else {
1411                 /* Passphrase not provided, ask first and use it to unlock existing keyslot */
1412                 key_from_terminal(cd, _("Enter any passphrase: "),
1413                                   &password, &passwordLen, 0);
1414                 if (!password) {
1415                         r = -EINVAL;
1416                         goto out;
1417                 }
1418
1419                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
1420                                            passwordLen, &cd->hdr, &mk, cd);
1421                 safe_free(password);
1422         }
1423
1424         if(r < 0)
1425                 goto out;
1426
1427         if (new_passphrase) {
1428                 new_password = (char *)new_passphrase;
1429                 new_passwordLen = new_passphrase_size;
1430         } else {
1431                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1432                                   &new_password, &new_passwordLen, 1);
1433                 if(!new_password) {
1434                         r = -EINVAL;
1435                         goto out;
1436                 }
1437         }
1438
1439         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1440                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1441         if(r < 0) goto out;
1442
1443         r = 0;
1444 out:
1445         if (!new_passphrase)
1446                 safe_free(new_password);
1447         LUKS_dealloc_masterkey(mk);
1448         return r ?: keyslot;
1449 }
1450
1451 int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
1452         int keyslot,
1453         const char *keyfile,
1454         size_t keyfile_size,
1455         const char *new_keyfile,
1456         size_t new_keyfile_size)
1457 {
1458         struct luks_masterkey *mk=NULL;
1459         char *password=NULL; unsigned int passwordLen;
1460         char *new_password = NULL; unsigned int new_passwordLen;
1461         int r;
1462
1463         log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
1464                 keyfile ?: "[none]", new_keyfile ?: "[none]");
1465
1466         if (!isLUKS(cd->type)) {
1467                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1468                 return -EINVAL;
1469         }
1470
1471         r = keyslot_verify_or_find_empty(cd, &keyslot);
1472         if (r)
1473                 return r;
1474
1475         if (!LUKS_keyslot_active_count(&cd->hdr)) {
1476                 /* No slots used, try to use pre-generated key in header */
1477                 if (cd->volume_key) {
1478                         mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1479                         r = mk ? 0 : -ENOMEM;
1480                 } else {
1481                         log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
1482                         return -EINVAL;
1483                 }
1484         } else {
1485                 /* Read password from file of (if NULL) from terminal */
1486                 if (keyfile)
1487                         key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen,
1488                                       keyfile, keyfile_size);
1489                 else
1490                         key_from_terminal(cd, _("Enter any passphrase: "),
1491                                         &password, &passwordLen, 1);
1492
1493                 if (!password)
1494                         return -EINVAL;
1495
1496                 r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
1497                                            &cd->hdr, &mk, cd);
1498                 safe_free(password);
1499         }
1500
1501         if(r < 0)
1502                 goto out;
1503
1504         if (new_keyfile)
1505                 key_from_file(cd, _("Enter new passphrase for key slot: "),
1506                               &new_password, &new_passwordLen, new_keyfile,
1507                               new_keyfile_size);
1508         else
1509                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1510                                   &new_password, &new_passwordLen, 1);
1511
1512         if(!new_password) {
1513                 r = -EINVAL;
1514                 goto out;
1515         }
1516
1517         r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
1518                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1519 out:
1520         safe_free(new_password);
1521         LUKS_dealloc_masterkey(mk);
1522         return r < 0 ? r : keyslot;
1523 }
1524
1525 int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
1526         int keyslot,
1527         const char *volume_key,
1528         size_t volume_key_size,
1529         const char *passphrase,
1530         size_t passphrase_size)
1531 {
1532         struct luks_masterkey *mk = NULL;
1533         int r = -EINVAL;
1534         char *new_password = NULL; unsigned int new_passwordLen;
1535
1536         log_dbg("Adding new keyslot %d using volume key.", keyslot);
1537
1538         if (!isLUKS(cd->type)) {
1539                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1540                 return -EINVAL;
1541         }
1542
1543         if (volume_key)
1544                 mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1545         else if (cd->volume_key)
1546                 mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
1547
1548         if (!mk)
1549                 return -ENOMEM;
1550
1551         r = LUKS_verify_master_key(&cd->hdr, mk);
1552         if (r < 0) {
1553                 log_err(cd, _("Volume key does not match the volume.\n"));
1554                 goto out;
1555         }
1556
1557         r = keyslot_verify_or_find_empty(cd, &keyslot);
1558         if (r)
1559                 goto out;
1560
1561         if (!passphrase) {
1562                 key_from_terminal(cd, _("Enter new passphrase for key slot: "),
1563                                   &new_password, &new_passwordLen, 1);
1564                 passphrase = new_password;
1565                 passphrase_size = new_passwordLen;
1566         }
1567
1568         r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
1569                          &cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
1570 out:
1571         if (new_password)
1572                 safe_free(new_password);
1573         LUKS_dealloc_masterkey(mk);
1574         return r ?: keyslot;
1575 }
1576
1577 int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
1578 {
1579         crypt_keyslot_info ki;
1580
1581         log_dbg("Destroying keyslot %d.", keyslot);
1582
1583         if (!isLUKS(cd->type)) {
1584                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1585                 return -EINVAL;
1586         }
1587
1588         ki = crypt_keyslot_status(cd, keyslot);
1589         if (ki == SLOT_INVALID) {
1590                 log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
1591                 return -EINVAL;
1592         }
1593
1594         if (ki == SLOT_INACTIVE) {
1595                 log_err(cd, _("Key slot %d is not used.\n"), keyslot);
1596                 return -EINVAL;
1597         }
1598
1599         return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
1600 }
1601
1602 // activation/deactivation of device mapping
1603 int crypt_activate_by_passphrase(struct crypt_device *cd,
1604         const char *name,
1605         int keyslot,
1606         const char *passphrase,
1607         size_t passphrase_size,
1608         uint32_t flags)
1609 {
1610         crypt_status_info ci;
1611         struct luks_masterkey *mk = NULL;
1612         char *prompt = NULL;
1613         int r;
1614
1615         log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
1616                 name ? "Activating" : "Checking", name ?: "",
1617                 keyslot, passphrase ? "" : "[none] ");
1618
1619         if (!name)
1620                 return -EINVAL;
1621
1622         /* plain, use hashed passphrase */
1623         if (isPLAIN(cd->type))
1624                 return create_device_helper(cd, name, cd->plain_hdr.hash,
1625                         cd->plain_cipher, cd->plain_cipher_mode, NULL, passphrase, passphrase_size,
1626                         cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
1627                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1628
1629         if (name) {
1630                 ci = crypt_status(NULL, name);
1631                 if (ci == INVALID)
1632                         return -EINVAL;
1633                 else if (ci >= ACTIVE) {
1634                         log_err(cd, _("Device %s already exists.\n"), name);
1635                         return -EEXIST;
1636                 }
1637         }
1638
1639         if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
1640                 return -ENOMEM;
1641
1642         /* provided passphrase, do not retry */
1643         if (passphrase) {
1644                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1645                                            passphrase_size, &cd->hdr, &mk, cd);
1646         } else
1647                 r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
1648
1649         if (r >= 0) {
1650                 keyslot = r;
1651                 if (name)
1652                         r = open_from_hdr_and_mk(cd, mk, name, flags);
1653         }
1654
1655         LUKS_dealloc_masterkey(mk);
1656         free(prompt);
1657
1658         return r < 0  ? r : keyslot;
1659 }
1660
1661 int crypt_activate_by_keyfile(struct crypt_device *cd,
1662         const char *name,
1663         int keyslot,
1664         const char *keyfile,
1665         size_t keyfile_size,
1666         uint32_t flags)
1667 {
1668         crypt_status_info ci;
1669         struct luks_masterkey *mk = NULL;
1670         char *passphrase_read = NULL;
1671         unsigned int passphrase_size_read;
1672         int r;
1673
1674         log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
1675                 name, keyslot, keyfile ?: "[none]");
1676
1677         if (!isLUKS(cd->type)) {
1678                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1679                 return -EINVAL;
1680         }
1681
1682         if (name) {
1683                 ci = crypt_status(NULL, name);
1684                 if (ci == INVALID)
1685                         return -EINVAL;
1686                 else if (ci >= ACTIVE) {
1687                         log_err(cd, _("Device %s already exists.\n"), name);
1688                         return -EEXIST;
1689                 }
1690         }
1691
1692         if (!keyfile)
1693                 return -EINVAL;
1694
1695         key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
1696                       &passphrase_size_read, keyfile, keyfile_size);
1697         if(!passphrase_read)
1698                 r = -EINVAL;
1699         else {
1700                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
1701                                            passphrase_size_read, &cd->hdr, &mk, cd);
1702                 safe_free(passphrase_read);
1703         }
1704
1705         if (r >= 0) {
1706                 keyslot = r;
1707                 r = open_from_hdr_and_mk(cd, mk, name, flags);
1708         }
1709
1710         LUKS_dealloc_masterkey(mk);
1711
1712         return r < 0 ? r : keyslot;
1713 }
1714
1715 int crypt_activate_by_volume_key(struct crypt_device *cd,
1716         const char *name,
1717         const char *volume_key,
1718         size_t volume_key_size,
1719         uint32_t flags)
1720 {
1721         crypt_status_info ci;
1722         struct luks_masterkey *mk;
1723         int r;
1724
1725         log_dbg("Activating volume %s by volume key.", name);
1726
1727         /* use key directly, no hash */
1728         if (isPLAIN(cd->type))
1729                 return create_device_helper(cd, name, NULL,
1730                         cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
1731                         cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
1732                         cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
1733
1734         if (!isLUKS(cd->type)) {
1735                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1736                 return -EINVAL;
1737         }
1738
1739         if (name) {
1740                 ci = crypt_status(NULL, name);
1741                 if (ci == INVALID)
1742                         return -EINVAL;
1743                 else if (ci >= ACTIVE) {
1744                         log_err(cd, _("Device %s already exists.\n"), name);
1745                         return -EEXIST;
1746                 }
1747         }
1748
1749         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1750         if (!mk)
1751                 return -ENOMEM;
1752         r = LUKS_verify_master_key(&cd->hdr, mk);
1753
1754         if (r == -EPERM)
1755                 log_err(cd, _("Volume key does not match the volume.\n"));
1756
1757         if (!r && name)
1758                 r = open_from_hdr_and_mk(cd, mk, name, flags);
1759
1760         LUKS_dealloc_masterkey(mk);
1761
1762         return r;
1763 }
1764
1765 int crypt_deactivate(struct crypt_device *cd, const char *name)
1766 {
1767         int r;
1768
1769         if (!name)
1770                 return -EINVAL;
1771
1772         log_dbg("Deactivating volume %s.", name);
1773
1774         if (!cd && dm_init(NULL, 1) < 0)
1775                 return -ENOSYS;
1776
1777         switch (crypt_status(cd, name)) {
1778                 case ACTIVE:    r = dm_remove_device(name, 0, 0);
1779                                 break;
1780                 case BUSY:      log_err(cd, _("Device %s is busy.\n"), name);
1781                                 r = -EBUSY;
1782                                 break;
1783                 case INACTIVE:  log_err(cd, _("Device %s is not active.\n"), name);
1784                                 r = -ENODEV;
1785                                 break;
1786                 default:        log_err(cd, _("Invalid device %s.\n"), name);
1787                                 r = -EINVAL;
1788         }
1789
1790         if (!cd)
1791                 dm_exit();
1792
1793         return r;
1794 }
1795
1796 // misc helper functions
1797 int crypt_volume_key_get(struct crypt_device *cd,
1798         int keyslot,
1799         char *volume_key,
1800         size_t *volume_key_size,
1801         const char *passphrase,
1802         size_t passphrase_size)
1803 {
1804         struct luks_masterkey *mk;
1805         char *processed_key = NULL;
1806         int r, key_len;
1807
1808         key_len = crypt_get_volume_key_size(cd);
1809         if (key_len > *volume_key_size) {
1810                 log_err(cd, _("Volume key buffer too small.\n"));
1811                 return -ENOMEM;
1812         }
1813
1814         if (isPLAIN(cd->type)) {
1815                 processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
1816                                             passphrase, passphrase_size);
1817                 if (!processed_key) {
1818                         log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
1819                         return -EINVAL;
1820                 }
1821                 memcpy(volume_key, processed_key, key_len);
1822                 *volume_key_size = key_len;
1823                 safe_free(processed_key);
1824                 return 0;
1825         }
1826
1827         if (isLUKS(cd->type)) {
1828                 r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
1829                                         passphrase_size, &cd->hdr, &mk, cd);
1830
1831                 if (r >= 0) {
1832                         memcpy(volume_key, mk->key, mk->keyLength);
1833                         *volume_key_size = mk->keyLength;
1834                 }
1835
1836                 LUKS_dealloc_masterkey(mk);
1837                 return r;
1838         }
1839
1840         log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
1841         return -EINVAL;
1842 }
1843
1844 int crypt_volume_key_verify(struct crypt_device *cd,
1845         const char *volume_key,
1846         size_t volume_key_size)
1847 {
1848         struct luks_masterkey *mk;
1849         int r;
1850
1851         if (!isLUKS(cd->type)) {
1852                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1853                 return -EINVAL;
1854         }
1855
1856         mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
1857         if (!mk)
1858                 return -ENOMEM;
1859
1860         r = LUKS_verify_master_key(&cd->hdr, mk);
1861
1862         if (r == -EPERM)
1863                 log_err(cd, _("Volume key does not match the volume.\n"));
1864
1865         LUKS_dealloc_masterkey(mk);
1866
1867         return r;
1868 }
1869
1870 void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
1871 {
1872         log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
1873         cd->timeout = timeout_sec;
1874 }
1875
1876 void crypt_set_password_retry(struct crypt_device *cd, int tries)
1877 {
1878         log_dbg("Password retry count set to %d.", tries);
1879         cd->tries = tries;
1880 }
1881
1882 void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
1883 {
1884         log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
1885         cd->iteration_time = iteration_time_ms;
1886 }
1887
1888 void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
1889 {
1890         log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
1891         cd->password_verify = password_verify ? 1 : 0;
1892 }
1893
1894 int crypt_memory_lock(struct crypt_device *cd, int lock)
1895 {
1896         return lock ? memlock_inc(cd) : memlock_dec(cd);
1897 }
1898
1899 // reporting
1900 crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
1901 {
1902         int r;
1903
1904         if (!cd && dm_init(NULL, 1) < 0)
1905                 return INVALID;
1906
1907         r = dm_status_device(name);
1908
1909         if (!cd)
1910                 dm_exit();
1911
1912         if (r < 0 && r != -ENODEV)
1913                 return INVALID;
1914
1915         if (r == 0)
1916                 return ACTIVE;
1917
1918         if (r > 0)
1919                 return BUSY;
1920
1921         return INACTIVE;
1922 }
1923
1924 static void hexprintICB(struct crypt_device *cd, char *d, int n)
1925 {
1926         int i;
1927         for(i = 0; i < n; i++)
1928                 log_std(cd, "%02hhx ", (char)d[i]);
1929 }
1930
1931 int crypt_dump(struct crypt_device *cd)
1932 {
1933         int i;
1934         if (!isLUKS(cd->type)) { //FIXME
1935                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
1936                 return -EINVAL;
1937         }
1938
1939         log_std(cd, "LUKS header information for %s\n\n", cd->device);
1940         log_std(cd, "Version:       \t%d\n", cd->hdr.version);
1941         log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
1942         log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
1943         log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
1944         log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
1945         log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
1946         log_std(cd, "MK digest:     \t");
1947         hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
1948         log_std(cd, "\n");
1949         log_std(cd, "MK salt:       \t");
1950         hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
1951         log_std(cd, "\n               \t");
1952         hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1953         log_std(cd, "\n");
1954         log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
1955         log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
1956         for(i = 0; i < LUKS_NUMKEYS; i++) {
1957                 if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
1958                         log_std(cd, "Key Slot %d: ENABLED\n",i);
1959                         log_std(cd, "\tIterations:         \t%d\n",
1960                                 cd->hdr.keyblock[i].passwordIterations);
1961                         log_std(cd, "\tSalt:               \t");
1962                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
1963                                     LUKS_SALTSIZE/2);
1964                         log_std(cd, "\n\t                      \t");
1965                         hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
1966                                     LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
1967                         log_std(cd, "\n");
1968
1969                         log_std(cd, "\tKey material offset:\t%d\n",
1970                                 cd->hdr.keyblock[i].keyMaterialOffset);
1971                         log_std(cd, "\tAF stripes:            \t%d\n",
1972                                 cd->hdr.keyblock[i].stripes);
1973                 }
1974                 else
1975                         log_std(cd, "Key Slot %d: DISABLED\n", i);
1976         }
1977         return 0;
1978 }
1979
1980 const char *crypt_get_cipher(struct crypt_device *cd)
1981 {
1982         if (isPLAIN(cd->type))
1983                 return cd->plain_cipher;
1984
1985         if (isLUKS(cd->type))
1986                 return cd->hdr.cipherName;
1987
1988         return NULL;
1989 }
1990
1991 const char *crypt_get_cipher_mode(struct crypt_device *cd)
1992 {
1993         if (isPLAIN(cd->type))
1994                 return cd->plain_cipher_mode;
1995
1996         if (isLUKS(cd->type))
1997                 return cd->hdr.cipherMode;
1998
1999         return NULL;
2000 }
2001
2002 const char *crypt_get_uuid(struct crypt_device *cd)
2003 {
2004         if (isLUKS(cd->type))
2005                 return cd->hdr.uuid;
2006
2007         return NULL;
2008 }
2009
2010 int crypt_get_volume_key_size(struct crypt_device *cd)
2011 {
2012         if (isPLAIN(cd->type))
2013                 return cd->volume_key->keyLength;
2014
2015         if (isLUKS(cd->type))
2016                 return cd->hdr.keyBytes;
2017
2018         return 0;
2019 }
2020
2021 uint64_t crypt_get_data_offset(struct crypt_device *cd)
2022 {
2023         if (isPLAIN(cd->type))
2024                 return cd->plain_hdr.offset;
2025
2026         if (isLUKS(cd->type))
2027                 return cd->hdr.payloadOffset;
2028
2029         return 0;
2030 }
2031
2032 crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
2033 {
2034         if (!isLUKS(cd->type)) {
2035                 log_err(cd, _("This operation is supported only for LUKS device.\n"));
2036                 return SLOT_INVALID;
2037         }
2038
2039         return LUKS_keyslot_info(&cd->hdr, keyslot);
2040 }