geom_eli.c revision 159308
1/*- 2 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sbin/geom/class/eli/geom_eli.c 159308 2006-06-05 21:40:54Z pjd $"); 29 30#include <stdio.h> 31#include <stdint.h> 32#include <stdlib.h> 33#include <unistd.h> 34#include <fcntl.h> 35#include <readpassphrase.h> 36#include <string.h> 37#include <strings.h> 38#include <libgeom.h> 39#include <paths.h> 40#include <errno.h> 41#include <assert.h> 42 43#include <sys/param.h> 44#include <sys/mman.h> 45#include <sys/resource.h> 46#include <opencrypto/cryptodev.h> 47#include <geom/eli/g_eli.h> 48#include <geom/eli/pkcs5v2.h> 49 50#include "core/geom.h" 51#include "misc/subr.h" 52 53 54uint32_t lib_version = G_LIB_VERSION; 55uint32_t version = G_ELI_VERSION; 56 57static char aalgo[] = "none"; 58static char ealgo[] = "aes"; 59static intmax_t keylen = 0; 60static intmax_t keyno = -1; 61static intmax_t iterations = -1; 62static intmax_t sectorsize = 0; 63static char keyfile[] = "", newkeyfile[] = ""; 64 65static void eli_main(struct gctl_req *req, unsigned flags); 66static void eli_init(struct gctl_req *req); 67static void eli_attach(struct gctl_req *req); 68static void eli_setkey(struct gctl_req *req); 69static void eli_delkey(struct gctl_req *req); 70static void eli_kill(struct gctl_req *req); 71static void eli_backup(struct gctl_req *req); 72static void eli_restore(struct gctl_req *req); 73static void eli_clear(struct gctl_req *req); 74static void eli_dump(struct gctl_req *req); 75 76/* 77 * Available commands: 78 * 79 * init [-bhPv] [-a aalgo] [-e ealgo] [-i iterations] [-l keylen] [-K newkeyfile] prov 80 * label - alias for 'init' 81 * attach [-dpv] [-k keyfile] prov 82 * detach [-fl] prov ... 83 * stop - alias for 'detach' 84 * onetime [-d] [-a aalgo] [-e ealgo] [-l keylen] prov ... 85 * setkey [-pPv] [-n keyno] [-k keyfile] [-K newkeyfile] prov 86 * delkey [-afv] [-n keyno] prov 87 * kill [-av] [prov ...] 88 * backup [-v] prov file 89 * restore [-v] file prov 90 * clear [-v] prov ... 91 * dump [-v] prov ... 92 */ 93struct g_command class_commands[] = { 94 { "init", G_FLAG_VERBOSE, eli_main, 95 { 96 { 'a', "aalgo", aalgo, G_TYPE_STRING }, 97 { 'b', "boot", NULL, G_TYPE_NONE }, 98 { 'e', "ealgo", ealgo, G_TYPE_STRING }, 99 { 'i', "iterations", &iterations, G_TYPE_NUMBER }, 100 { 'K', "newkeyfile", newkeyfile, G_TYPE_STRING }, 101 { 'l', "keylen", &keylen, G_TYPE_NUMBER }, 102 { 'P', "nonewpassphrase", NULL, G_TYPE_NONE }, 103 { 's', "sectorsize", §orsize, G_TYPE_NUMBER }, 104 G_OPT_SENTINEL 105 }, 106 "[-bPv] [-a aalgo] [-e ealgo] [-i iterations] [-l keylen] [-K newkeyfile] [-s sectorsize] prov" 107 }, 108 { "label", G_FLAG_VERBOSE, eli_main, 109 { 110 { 'a', "aalgo", aalgo, G_TYPE_STRING }, 111 { 'b', "boot", NULL, G_TYPE_NONE }, 112 { 'e', "ealgo", ealgo, G_TYPE_STRING }, 113 { 'i', "iterations", &iterations, G_TYPE_NUMBER }, 114 { 'K', "newkeyfile", newkeyfile, G_TYPE_STRING }, 115 { 'l', "keylen", &keylen, G_TYPE_NUMBER }, 116 { 'P', "nonewpassphrase", NULL, G_TYPE_NONE }, 117 { 's', "sectorsize", §orsize, G_TYPE_NUMBER }, 118 G_OPT_SENTINEL 119 }, 120 "- an alias for 'init'" 121 }, 122 { "attach", G_FLAG_VERBOSE | G_FLAG_LOADKLD, eli_main, 123 { 124 { 'd', "detach", NULL, G_TYPE_NONE }, 125 { 'k', "keyfile", keyfile, G_TYPE_STRING }, 126 { 'p', "nopassphrase", NULL, G_TYPE_NONE }, 127 G_OPT_SENTINEL 128 }, 129 "[-dpv] [-k keyfile] prov" 130 }, 131 { "detach", 0, NULL, 132 { 133 { 'f', "force", NULL, G_TYPE_NONE }, 134 { 'l', "last", NULL, G_TYPE_NONE }, 135 G_OPT_SENTINEL 136 }, 137 "[-fl] prov ..." 138 }, 139 { "stop", 0, NULL, 140 { 141 { 'f', "force", NULL, G_TYPE_NONE }, 142 { 'l', "last", NULL, G_TYPE_NONE }, 143 G_OPT_SENTINEL 144 }, 145 "- an alias for 'detach'" 146 }, 147 { "onetime", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, 148 { 149 { 'a', "aalgo", aalgo, G_TYPE_STRING }, 150 { 'd', "detach", NULL, G_TYPE_NONE }, 151 { 'e', "ealgo", ealgo, G_TYPE_STRING }, 152 { 'l', "keylen", &keylen, G_TYPE_NUMBER }, 153 { 's', "sectorsize", §orsize, G_TYPE_NUMBER }, 154 G_OPT_SENTINEL 155 }, 156 "[-d] [-a aalgo] [-e ealgo] [-l keylen] [-s sectorsize] prov ..." 157 }, 158 { "setkey", G_FLAG_VERBOSE, eli_main, 159 { 160 { 'i', "iterations", &iterations, G_TYPE_NUMBER }, 161 { 'k', "keyfile", keyfile, G_TYPE_STRING }, 162 { 'K', "newkeyfile", newkeyfile, G_TYPE_STRING }, 163 { 'n', "keyno", &keyno, G_TYPE_NUMBER }, 164 { 'p', "nopassphrase", NULL, G_TYPE_NONE }, 165 { 'P', "nonewpassphrase", NULL, G_TYPE_NONE }, 166 G_OPT_SENTINEL 167 }, 168 "[-pPv] [-n keyno] [-i iterations] [-k keyfile] [-K newkeyfile] prov" 169 }, 170 { "delkey", G_FLAG_VERBOSE, eli_main, 171 { 172 { 'a', "all", NULL, G_TYPE_NONE }, 173 { 'f', "force", NULL, G_TYPE_NONE }, 174 { 'n', "keyno", &keyno, G_TYPE_NUMBER }, 175 G_OPT_SENTINEL 176 }, 177 "[-afv] [-n keyno] prov" 178 }, 179 { "kill", G_FLAG_VERBOSE, eli_main, 180 { 181 { 'a', "all", NULL, G_TYPE_NONE }, 182 G_OPT_SENTINEL 183 }, 184 "[-av] [prov ...]" 185 }, 186 { "backup", G_FLAG_VERBOSE, eli_main, G_NULL_OPTS, 187 "[-v] prov file" 188 }, 189 { "restore", G_FLAG_VERBOSE, eli_main, G_NULL_OPTS, 190 "[-v] file prov" 191 }, 192 { "clear", G_FLAG_VERBOSE, eli_main, G_NULL_OPTS, 193 "[-v] prov ..." 194 }, 195 { "dump", G_FLAG_VERBOSE, eli_main, G_NULL_OPTS, 196 "[-v] prov ..." 197 }, 198 G_CMD_SENTINEL 199}; 200 201static int verbose = 0; 202 203static int 204eli_protect(struct gctl_req *req) 205{ 206 struct rlimit rl; 207 208 /* Disable core dumps. */ 209 rl.rlim_cur = 0; 210 rl.rlim_max = 0; 211 if (setrlimit(RLIMIT_CORE, &rl) == -1) { 212 gctl_error(req, "Cannot disable core dumps: %s.", 213 strerror(errno)); 214 return (-1); 215 } 216 /* Disable swapping. */ 217 if (mlockall(MCL_FUTURE) == -1) { 218 gctl_error(req, "Cannot lock memory: %s.", strerror(errno)); 219 return (-1); 220 } 221 return (0); 222} 223 224static void 225eli_main(struct gctl_req *req, unsigned flags) 226{ 227 const char *name; 228 229 if (eli_protect(req) == -1) 230 return; 231 232 if ((flags & G_FLAG_VERBOSE) != 0) 233 verbose = 1; 234 235 name = gctl_get_ascii(req, "verb"); 236 if (name == NULL) { 237 gctl_error(req, "No '%s' argument.", "verb"); 238 return; 239 } 240 if (strcmp(name, "init") == 0 || strcmp(name, "label") == 0) 241 eli_init(req); 242 else if (strcmp(name, "attach") == 0) 243 eli_attach(req); 244 else if (strcmp(name, "setkey") == 0) 245 eli_setkey(req); 246 else if (strcmp(name, "delkey") == 0) 247 eli_delkey(req); 248 else if (strcmp(name, "kill") == 0) 249 eli_kill(req); 250 else if (strcmp(name, "backup") == 0) 251 eli_backup(req); 252 else if (strcmp(name, "restore") == 0) 253 eli_restore(req); 254 else if (strcmp(name, "dump") == 0) 255 eli_dump(req); 256 else if (strcmp(name, "clear") == 0) 257 eli_clear(req); 258 else 259 gctl_error(req, "Unknown command: %s.", name); 260} 261 262static void 263arc4rand(unsigned char *buf, size_t size) 264{ 265 uint32_t *buf4; 266 size_t size4; 267 unsigned i; 268 269 buf4 = (uint32_t *)buf; 270 size4 = size / 4; 271 272 for (i = 0; i < size4; i++) 273 buf4[i] = arc4random(); 274 for (i *= 4; i < size; i++) 275 buf[i] = arc4random() % 0xff; 276} 277 278static int 279eli_is_attached(const char *prov) 280{ 281 char name[MAXPATHLEN]; 282 unsigned secsize; 283 284 /* 285 * Not the best way to do it, but the easiest. 286 * We try to open provider and check if it is a GEOM provider 287 * by asking about its sectorsize. 288 */ 289 snprintf(name, sizeof(name), "%s%s", prov, G_ELI_SUFFIX); 290 secsize = g_get_sectorsize(name); 291 if (secsize > 0) 292 return (1); 293 return (0); 294} 295 296static unsigned char * 297eli_genkey(struct gctl_req *req, struct g_eli_metadata *md, unsigned char *key, 298 int new) 299{ 300 struct hmac_ctx ctx; 301 const char *str; 302 int error, nopassphrase; 303 304 nopassphrase = 305 gctl_get_int(req, new ? "nonewpassphrase" : "nopassphrase"); 306 307 g_eli_crypto_hmac_init(&ctx, NULL, 0); 308 309 str = gctl_get_ascii(req, new ? "newkeyfile" : "keyfile"); 310 if (str[0] == '\0' && nopassphrase) { 311 gctl_error(req, "No key components given."); 312 return (NULL); 313 } else if (str[0] != '\0') { 314 char buf[MAXPHYS]; 315 ssize_t done; 316 int fd; 317 318 if (strcmp(str, "-") == 0) 319 fd = STDIN_FILENO; 320 else { 321 fd = open(str, O_RDONLY); 322 if (fd == -1) { 323 gctl_error(req, "Cannot open keyfile %s: %s.", 324 str, strerror(errno)); 325 return (NULL); 326 } 327 } 328 while ((done = read(fd, buf, sizeof(buf))) > 0) 329 g_eli_crypto_hmac_update(&ctx, buf, done); 330 error = errno; 331 if (strcmp(str, "-") != 0) 332 close(fd); 333 bzero(buf, sizeof(buf)); 334 if (done == -1) { 335 gctl_error(req, "Cannot read keyfile %s: %s.", str, 336 strerror(error)); 337 return (NULL); 338 } 339 } 340 341 if (!nopassphrase) { 342 char buf1[BUFSIZ], buf2[BUFSIZ], *p; 343 344 if (!new && md->md_iterations == -1) { 345 gctl_error(req, "Missing -p flag."); 346 return (NULL); 347 } 348 for (;;) { 349 p = readpassphrase( 350 new ? "Enter new passphrase:" : "Enter passphrase:", 351 buf1, sizeof(buf1), RPP_ECHO_OFF | RPP_REQUIRE_TTY); 352 if (p == NULL) { 353 bzero(buf1, sizeof(buf1)); 354 gctl_error(req, "Cannot read passphrase: %s.", 355 strerror(errno)); 356 return (NULL); 357 } 358 359 if (new) { 360 p = readpassphrase("Reenter new passphrase: ", 361 buf2, sizeof(buf2), 362 RPP_ECHO_OFF | RPP_REQUIRE_TTY); 363 if (p == NULL) { 364 bzero(buf1, sizeof(buf1)); 365 gctl_error(req, 366 "Cannot read passphrase: %s.", 367 strerror(errno)); 368 return (NULL); 369 } 370 371 if (strcmp(buf1, buf2) != 0) { 372 bzero(buf2, sizeof(buf2)); 373 fprintf(stderr, "They didn't match.\n"); 374 continue; 375 } 376 bzero(buf2, sizeof(buf2)); 377 } 378 break; 379 } 380 /* 381 * Field md_iterations equal to -1 means "choose some sane 382 * value for me". 383 */ 384 if (md->md_iterations == -1) { 385 assert(new); 386 if (verbose) 387 printf("Calculating number of iterations...\n"); 388 md->md_iterations = pkcs5v2_calculate(2000000); 389 assert(md->md_iterations > 0); 390 if (verbose) { 391 printf("Done, using %d iterations.\n", 392 md->md_iterations); 393 } 394 } 395 /* 396 * If md_iterations is equal to 0, user don't want PKCS5v2. 397 */ 398 if (md->md_iterations == 0) { 399 g_eli_crypto_hmac_update(&ctx, md->md_salt, 400 sizeof(md->md_salt)); 401 g_eli_crypto_hmac_update(&ctx, buf1, strlen(buf1)); 402 } else /* if (md->md_iterations > 0) */ { 403 unsigned char dkey[G_ELI_USERKEYLEN]; 404 405 pkcs5v2_genkey(dkey, sizeof(dkey), md->md_salt, 406 sizeof(md->md_salt), buf1, md->md_iterations); 407 g_eli_crypto_hmac_update(&ctx, dkey, sizeof(dkey)); 408 bzero(dkey, sizeof(dkey)); 409 } 410 bzero(buf1, sizeof(buf1)); 411 } 412 g_eli_crypto_hmac_final(&ctx, key, 0); 413 return (key); 414} 415 416static int 417eli_metadata_read(struct gctl_req *req, const char *prov, 418 struct g_eli_metadata *md) 419{ 420 unsigned char sector[sizeof(struct g_eli_metadata)]; 421 int error; 422 423 if (g_get_sectorsize(prov) == 0) { 424 int fd; 425 426 /* This is a file probably. */ 427 fd = open(prov, O_RDONLY); 428 if (fd == -1) { 429 gctl_error(req, "Cannot open %s: %s.", prov, 430 strerror(errno)); 431 return (-1); 432 } 433 if (read(fd, sector, sizeof(sector)) != sizeof(sector)) { 434 gctl_error(req, "Cannot read metadata from %s: %s.", 435 prov, strerror(errno)); 436 close(fd); 437 return (-1); 438 } 439 close(fd); 440 } else { 441 /* This is a GEOM provider. */ 442 error = g_metadata_read(prov, sector, sizeof(sector), 443 G_ELI_MAGIC); 444 if (error != 0) { 445 gctl_error(req, "Cannot read metadata from %s: %s.", 446 prov, strerror(error)); 447 return (-1); 448 } 449 } 450 if (eli_metadata_decode(sector, md) != 0) { 451 gctl_error(req, "MD5 hash mismatch for %s.", prov); 452 return (-1); 453 } 454 return (0); 455} 456 457static int 458eli_metadata_store(struct gctl_req *req, const char *prov, 459 struct g_eli_metadata *md) 460{ 461 unsigned char sector[sizeof(struct g_eli_metadata)]; 462 int error; 463 464 eli_metadata_encode(md, sector); 465 if (g_get_sectorsize(prov) == 0) { 466 int fd; 467 468 /* This is a file probably. */ 469 fd = open(prov, O_WRONLY | O_TRUNC); 470 if (fd == -1) { 471 gctl_error(req, "Cannot open %s: %s.", prov, 472 strerror(errno)); 473 bzero(sector, sizeof(sector)); 474 return (-1); 475 } 476 if (write(fd, sector, sizeof(sector)) != sizeof(sector)) { 477 gctl_error(req, "Cannot write metadata to %s: %s.", 478 prov, strerror(errno)); 479 bzero(sector, sizeof(sector)); 480 close(fd); 481 return (-1); 482 } 483 close(fd); 484 } else { 485 /* This is a GEOM provider. */ 486 error = g_metadata_store(prov, sector, sizeof(sector)); 487 if (error != 0) { 488 gctl_error(req, "Cannot write metadata to %s: %s.", 489 prov, strerror(errno)); 490 bzero(sector, sizeof(sector)); 491 return (-1); 492 } 493 } 494 bzero(sector, sizeof(sector)); 495 return (0); 496} 497 498static void 499eli_init(struct gctl_req *req) 500{ 501 struct g_eli_metadata md; 502 unsigned char sector[sizeof(struct g_eli_metadata)]; 503 unsigned char key[G_ELI_USERKEYLEN]; 504 const char *str, *prov; 505 unsigned secsize; 506 off_t mediasize; 507 intmax_t val; 508 int error, nargs; 509 510 nargs = gctl_get_int(req, "nargs"); 511 if (nargs != 1) { 512 gctl_error(req, "Invalid number of arguments."); 513 return; 514 } 515 prov = gctl_get_ascii(req, "arg0"); 516 mediasize = g_get_mediasize(prov); 517 secsize = g_get_sectorsize(prov); 518 if (mediasize == 0 || secsize == 0) { 519 gctl_error(req, "Cannot get informations about %s: %s.", prov, 520 strerror(errno)); 521 return; 522 } 523 524 bzero(&md, sizeof(md)); 525 strlcpy(md.md_magic, G_ELI_MAGIC, sizeof(md.md_magic)); 526 md.md_version = G_ELI_VERSION; 527 md.md_flags = 0; 528 if (gctl_get_int(req, "boot")) 529 md.md_flags |= G_ELI_FLAG_BOOT; 530 str = gctl_get_ascii(req, "aalgo"); 531 if (strcmp(str, "none") != 0) { 532 md.md_aalgo = g_eli_str2aalgo(str); 533 if (md.md_aalgo < CRYPTO_ALGORITHM_MIN || 534 md.md_aalgo > CRYPTO_ALGORITHM_MAX) { 535 gctl_error(req, "Invalid authentication algorithm."); 536 return; 537 } 538 md.md_flags |= G_ELI_FLAG_AUTH; 539 } 540 str = gctl_get_ascii(req, "ealgo"); 541 md.md_ealgo = g_eli_str2ealgo(str); 542 if (md.md_ealgo < CRYPTO_ALGORITHM_MIN || 543 md.md_ealgo > CRYPTO_ALGORITHM_MAX) { 544 gctl_error(req, "Invalid encryption algorithm."); 545 return; 546 } 547 val = gctl_get_intmax(req, "keylen"); 548 md.md_keylen = val; 549 md.md_keylen = g_eli_keylen(md.md_ealgo, md.md_keylen); 550 if (md.md_keylen == 0) { 551 gctl_error(req, "Invalid key length."); 552 return; 553 } 554 md.md_provsize = mediasize; 555 556 val = gctl_get_intmax(req, "iterations"); 557 if (val != -1) { 558 int nonewpassphrase; 559 560 /* 561 * Don't allow to set iterations when there will be no 562 * passphrase. 563 */ 564 nonewpassphrase = gctl_get_int(req, "nonewpassphrase"); 565 if (nonewpassphrase) { 566 gctl_error(req, 567 "Options -i and -P are mutually exclusive."); 568 return; 569 } 570 } 571 md.md_iterations = val; 572 573 val = gctl_get_intmax(req, "sectorsize"); 574 if (val == 0) 575 md.md_sectorsize = secsize; 576 else { 577 if (val < 0 || (val % secsize) != 0) { 578 gctl_error(req, "Invalid sector size."); 579 return; 580 } 581 md.md_sectorsize = val; 582 } 583 584 md.md_keys = 0x01; 585 arc4rand(md.md_salt, sizeof(md.md_salt)); 586 arc4rand(md.md_mkeys, sizeof(md.md_mkeys)); 587 588 /* Generate user key. */ 589 if (eli_genkey(req, &md, key, 1) == NULL) { 590 bzero(key, sizeof(key)); 591 bzero(&md, sizeof(md)); 592 return; 593 } 594 595 /* Encrypt the first and the only Master Key. */ 596 error = g_eli_mkey_encrypt(md.md_ealgo, key, md.md_keylen, md.md_mkeys); 597 bzero(key, sizeof(key)); 598 if (error != 0) { 599 bzero(&md, sizeof(md)); 600 gctl_error(req, "Cannot encrypt Master Key: %s.", 601 strerror(error)); 602 return; 603 } 604 605 eli_metadata_encode(&md, sector); 606 bzero(&md, sizeof(md)); 607 error = g_metadata_store(prov, sector, sizeof(sector)); 608 bzero(sector, sizeof(sector)); 609 if (error != 0) { 610 gctl_error(req, "Cannot store metadata on %s: %s.", prov, 611 strerror(error)); 612 return; 613 } 614 if (verbose) 615 printf("Metadata value stored on %s.\n", prov); 616} 617 618static void 619eli_attach(struct gctl_req *req) 620{ 621 struct g_eli_metadata md; 622 unsigned char key[G_ELI_USERKEYLEN]; 623 const char *prov; 624 int nargs; 625 626 nargs = gctl_get_int(req, "nargs"); 627 if (nargs != 1) { 628 gctl_error(req, "Invalid number of arguments."); 629 return; 630 } 631 prov = gctl_get_ascii(req, "arg0"); 632 633 if (eli_metadata_read(req, prov, &md) == -1) 634 return; 635 636 if (eli_genkey(req, &md, key, 0) == NULL) { 637 bzero(key, sizeof(key)); 638 return; 639 } 640 641 gctl_ro_param(req, "key", sizeof(key), key); 642 if (gctl_issue(req) == NULL) { 643 if (verbose) 644 printf("Attched to %s.\n", prov); 645 } 646 bzero(key, sizeof(key)); 647} 648 649static void 650eli_setkey_attached(struct gctl_req *req, struct g_eli_metadata *md) 651{ 652 unsigned char key[G_ELI_USERKEYLEN]; 653 intmax_t val; 654 655 val = gctl_get_intmax(req, "iterations"); 656 /* Check if iterations number should be changed. */ 657 if (val != -1) 658 md->md_iterations = val; 659 660 /* Generate key for Master Key encryption. */ 661 if (eli_genkey(req, md, key, 1) == NULL) { 662 bzero(key, sizeof(key)); 663 return; 664 } 665 666 gctl_ro_param(req, "key", sizeof(key), key); 667 gctl_issue(req); 668 bzero(key, sizeof(key)); 669} 670 671static void 672eli_setkey_detached(struct gctl_req *req, const char *prov, 673 struct g_eli_metadata *md) 674{ 675 unsigned char key[G_ELI_USERKEYLEN], mkey[G_ELI_DATAIVKEYLEN]; 676 unsigned char *mkeydst; 677 intmax_t val; 678 unsigned nkey; 679 int error; 680 681 if (md->md_keys == 0) { 682 gctl_error(req, "No valid keys on %s.", prov); 683 return; 684 } 685 686 /* Generate key for Master Key decryption. */ 687 if (eli_genkey(req, md, key, 0) == NULL) { 688 bzero(key, sizeof(key)); 689 return; 690 } 691 692 /* Decrypt Master Key. */ 693 error = g_eli_mkey_decrypt(md, key, mkey, &nkey); 694 bzero(key, sizeof(key)); 695 if (error != 0) { 696 bzero(md, sizeof(*md)); 697 if (error == -1) 698 gctl_error(req, "Wrong key for %s.", prov); 699 else /* if (error > 0) */ { 700 gctl_error(req, "Cannot decrypt Master Key: %s.", 701 strerror(error)); 702 } 703 return; 704 } 705 if (verbose) 706 printf("Decrypted Master Key %u.\n", nkey); 707 708 val = gctl_get_intmax(req, "keyno"); 709 if (val != -1) 710 nkey = val; 711#if 0 712 else 713 ; /* Use the key number which was found during decryption. */ 714#endif 715 if (nkey >= G_ELI_MAXMKEYS) { 716 gctl_error(req, "Invalid '%s' argument.", "keyno"); 717 return; 718 } 719 720 val = gctl_get_intmax(req, "iterations"); 721 /* Check if iterations number should and can be changed. */ 722 if (val != -1) { 723 if (bitcount32(md->md_keys) != 1) { 724 gctl_error(req, "To be able to use '-i' option, only " 725 "one key can be defined."); 726 return; 727 } 728 if (md->md_keys != (1 << nkey)) { 729 gctl_error(req, "Only already defined key can be " 730 "changed when '-i' option is used."); 731 return; 732 } 733 md->md_iterations = val; 734 } 735 736 mkeydst = md->md_mkeys + nkey * G_ELI_MKEYLEN; 737 md->md_keys |= (1 << nkey); 738 739 bcopy(mkey, mkeydst, sizeof(mkey)); 740 bzero(mkey, sizeof(mkey)); 741 742 /* Generate key for Master Key encryption. */ 743 if (eli_genkey(req, md, key, 1) == NULL) { 744 bzero(key, sizeof(key)); 745 bzero(md, sizeof(*md)); 746 return; 747 } 748 749 /* Encrypt the Master-Key with the new key. */ 750 error = g_eli_mkey_encrypt(md->md_ealgo, key, md->md_keylen, mkeydst); 751 bzero(key, sizeof(key)); 752 if (error != 0) { 753 bzero(md, sizeof(*md)); 754 gctl_error(req, "Cannot encrypt Master Key: %s.", 755 strerror(error)); 756 return; 757 } 758 759 /* Store metadata with fresh key. */ 760 eli_metadata_store(req, prov, md); 761 bzero(md, sizeof(*md)); 762} 763 764static void 765eli_setkey(struct gctl_req *req) 766{ 767 struct g_eli_metadata md; 768 const char *prov; 769 int nargs; 770 771 nargs = gctl_get_int(req, "nargs"); 772 if (nargs != 1) { 773 gctl_error(req, "Invalid number of arguments."); 774 return; 775 } 776 prov = gctl_get_ascii(req, "arg0"); 777 778 if (eli_metadata_read(req, prov, &md) == -1) 779 return; 780 781 if (eli_is_attached(prov)) 782 eli_setkey_attached(req, &md); 783 else 784 eli_setkey_detached(req, prov, &md); 785} 786 787static void 788eli_delkey_attached(struct gctl_req *req, const char *prov __unused) 789{ 790 791 gctl_issue(req); 792} 793 794static void 795eli_delkey_detached(struct gctl_req *req, const char *prov) 796{ 797 struct g_eli_metadata md; 798 unsigned char *mkeydst; 799 intmax_t val; 800 unsigned nkey; 801 int all, force; 802 803 if (eli_metadata_read(req, prov, &md) == -1) 804 return; 805 806 all = gctl_get_int(req, "all"); 807 if (all) 808 arc4rand(md.md_mkeys, sizeof(md.md_mkeys)); 809 else { 810 force = gctl_get_int(req, "force"); 811 val = gctl_get_intmax(req, "keyno"); 812 if (val == -1) { 813 gctl_error(req, "Key number has to be specified."); 814 return; 815 } 816 nkey = val; 817 if (nkey >= G_ELI_MAXMKEYS) { 818 gctl_error(req, "Invalid '%s' argument.", "keyno"); 819 return; 820 } 821 if (!(md.md_keys & (1 << nkey)) && !force) { 822 gctl_error(req, "Master Key %u is not set.", nkey); 823 return; 824 } 825 md.md_keys &= ~(1 << nkey); 826 if (md.md_keys == 0 && !force) { 827 gctl_error(req, "This is the last Master Key. Use '-f' " 828 "option if you really want to remove it."); 829 return; 830 } 831 mkeydst = md.md_mkeys + nkey * G_ELI_MKEYLEN; 832 arc4rand(mkeydst, G_ELI_MKEYLEN); 833 } 834 835 eli_metadata_store(req, prov, &md); 836 bzero(&md, sizeof(md)); 837} 838 839static void 840eli_delkey(struct gctl_req *req) 841{ 842 const char *prov; 843 int nargs; 844 845 nargs = gctl_get_int(req, "nargs"); 846 if (nargs != 1) { 847 gctl_error(req, "Invalid number of arguments."); 848 return; 849 } 850 prov = gctl_get_ascii(req, "arg0"); 851 852 if (eli_is_attached(prov)) 853 eli_delkey_attached(req, prov); 854 else 855 eli_delkey_detached(req, prov); 856} 857 858static void 859eli_kill_detached(struct gctl_req *req, const char *prov) 860{ 861 struct g_eli_metadata md; 862 int error; 863 864 /* 865 * NOTE: Maybe we should verify if this is geli provider first, 866 * but 'kill' command is quite critical so better don't waste 867 * the time. 868 */ 869#if 0 870 error = g_metadata_read(prov, (unsigned char *)&md, sizeof(md), 871 G_ELI_MAGIC); 872 if (error != 0) { 873 gctl_error(req, "Cannot read metadata from %s: %s.", prov, 874 strerror(error)); 875 return; 876 } 877#endif 878 879 arc4rand((unsigned char *)&md, sizeof(md)); 880 error = g_metadata_store(prov, (unsigned char *)&md, sizeof(md)); 881 if (error != 0) { 882 gctl_error(req, "Cannot write metadata to %s: %s.", prov, 883 strerror(error)); 884 } 885} 886 887static void 888eli_kill(struct gctl_req *req) 889{ 890 const char *prov; 891 int i, nargs, all; 892 893 nargs = gctl_get_int(req, "nargs"); 894 all = gctl_get_int(req, "all"); 895 if (!all && nargs == 0) { 896 gctl_error(req, "Too few arguments."); 897 return; 898 } 899 /* 900 * How '-a' option combine with a list of providers: 901 * Delete Master Keys from all attached providers: 902 * geli kill -a 903 * Delete Master Keys from all attached provider and from 904 * detached da0 and da1: 905 * geli kill -a da0 da1 906 * Delete Master Keys from (attached or detached) da0 and da1: 907 * geli kill da0 da1 908 */ 909 910 /* 911 * First attached providers. 912 */ 913 gctl_issue(req); 914 /* 915 * Now the rest. 916 */ 917 for (i = 0; i < nargs; i++) { 918 prov = gctl_get_ascii(req, "arg%d", i); 919 if (!eli_is_attached(prov)) 920 eli_kill_detached(req, prov); 921 } 922} 923 924static void 925eli_backup(struct gctl_req *req) 926{ 927 struct g_eli_metadata md; 928 const char *file, *prov; 929 unsigned secsize; 930 unsigned char *sector; 931 off_t mediasize; 932 int nargs, filefd, provfd; 933 934 nargs = gctl_get_int(req, "nargs"); 935 if (nargs != 2) { 936 gctl_error(req, "Invalid number of arguments."); 937 return; 938 } 939 prov = gctl_get_ascii(req, "arg0"); 940 file = gctl_get_ascii(req, "arg1"); 941 942 provfd = filefd = -1; 943 sector = NULL; 944 secsize = 0; 945 946 provfd = open(prov, O_RDONLY); 947 if (provfd == -1 && errno == ENOENT && prov[0] != '/') { 948 char devprov[MAXPATHLEN]; 949 950 snprintf(devprov, sizeof(devprov), "%s%s", _PATH_DEV, prov); 951 provfd = open(devprov, O_RDONLY); 952 } 953 if (provfd == -1) { 954 gctl_error(req, "Cannot open %s: %s.", prov, strerror(errno)); 955 return; 956 } 957 filefd = open(file, O_WRONLY | O_TRUNC | O_CREAT, 0600); 958 if (filefd == -1) { 959 gctl_error(req, "Cannot open %s: %s.", file, strerror(errno)); 960 goto out; 961 } 962 963 mediasize = g_get_mediasize(prov); 964 secsize = g_get_sectorsize(prov); 965 if (mediasize == 0 || secsize == 0) { 966 gctl_error(req, "Cannot get informations about %s: %s.", prov, 967 strerror(errno)); 968 return; 969 } 970 971 sector = malloc(secsize); 972 if (sector == NULL) { 973 gctl_error(req, "Cannot allocate memory."); 974 return; 975 } 976 977 /* Read metadata from the provider. */ 978 if (pread(provfd, sector, secsize, mediasize - secsize) != 979 (ssize_t)secsize) { 980 gctl_error(req, "Cannot read metadata: %s.", strerror(errno)); 981 goto out; 982 } 983 /* Check if this is geli provider. */ 984 if (eli_metadata_decode(sector, &md) != 0) { 985 gctl_error(req, "MD5 hash mismatch: not a geli provider?"); 986 goto out; 987 } 988 /* Write metadata to the destination file. */ 989 if (write(filefd, sector, secsize) != (ssize_t)secsize) { 990 gctl_error(req, "Cannot write to %s: %s.", file, 991 strerror(errno)); 992 goto out; 993 } 994out: 995 if (provfd > 0) 996 close(provfd); 997 if (filefd > 0) 998 close(filefd); 999 if (sector != NULL) { 1000 bzero(sector, secsize); 1001 free(sector); 1002 } 1003} 1004 1005static void 1006eli_restore(struct gctl_req *req) 1007{ 1008 struct g_eli_metadata md; 1009 const char *file, *prov; 1010 unsigned char *sector; 1011 unsigned secsize; 1012 off_t mediasize; 1013 int nargs, filefd, provfd; 1014 1015 nargs = gctl_get_int(req, "nargs"); 1016 if (nargs != 2) { 1017 gctl_error(req, "Invalid number of arguments."); 1018 return; 1019 } 1020 file = gctl_get_ascii(req, "arg0"); 1021 prov = gctl_get_ascii(req, "arg1"); 1022 1023 provfd = filefd = -1; 1024 sector = NULL; 1025 secsize = 0; 1026 1027 filefd = open(file, O_RDONLY); 1028 if (filefd == -1) { 1029 gctl_error(req, "Cannot open %s: %s.", file, strerror(errno)); 1030 goto out; 1031 } 1032 provfd = open(prov, O_WRONLY); 1033 if (provfd == -1 && errno == ENOENT && prov[0] != '/') { 1034 char devprov[MAXPATHLEN]; 1035 1036 snprintf(devprov, sizeof(devprov), "%s%s", _PATH_DEV, prov); 1037 provfd = open(devprov, O_WRONLY); 1038 } 1039 if (provfd == -1) { 1040 gctl_error(req, "Cannot open %s: %s.", prov, strerror(errno)); 1041 return; 1042 } 1043 1044 mediasize = g_get_mediasize(prov); 1045 secsize = g_get_sectorsize(prov); 1046 if (mediasize == 0 || secsize == 0) { 1047 gctl_error(req, "Cannot get informations about %s: %s.", prov, 1048 strerror(errno)); 1049 return; 1050 } 1051 1052 sector = malloc(secsize); 1053 if (sector == NULL) { 1054 gctl_error(req, "Cannot allocate memory."); 1055 return; 1056 } 1057 1058 /* Read metadata from the backup file. */ 1059 if (read(filefd, sector, secsize) != (ssize_t)secsize) { 1060 gctl_error(req, "Cannot read from %s: %s.", file, 1061 strerror(errno)); 1062 goto out; 1063 } 1064 /* Check if this file contains geli metadata. */ 1065 if (eli_metadata_decode(sector, &md) != 0) { 1066 gctl_error(req, "MD5 hash mismatch: not a geli backup file?"); 1067 goto out; 1068 } 1069 /* Read metadata from the provider. */ 1070 if (pwrite(provfd, sector, secsize, mediasize - secsize) != 1071 (ssize_t)secsize) { 1072 gctl_error(req, "Cannot write metadata: %s.", strerror(errno)); 1073 goto out; 1074 } 1075out: 1076 if (provfd > 0) 1077 close(provfd); 1078 if (filefd > 0) 1079 close(filefd); 1080 if (sector != NULL) { 1081 bzero(sector, secsize); 1082 free(sector); 1083 } 1084} 1085 1086static void 1087eli_clear(struct gctl_req *req) 1088{ 1089 const char *name; 1090 int error, i, nargs; 1091 1092 nargs = gctl_get_int(req, "nargs"); 1093 if (nargs < 1) { 1094 gctl_error(req, "Too few arguments."); 1095 return; 1096 } 1097 1098 for (i = 0; i < nargs; i++) { 1099 name = gctl_get_ascii(req, "arg%d", i); 1100 error = g_metadata_clear(name, G_ELI_MAGIC); 1101 if (error != 0) { 1102 fprintf(stderr, "Cannot clear metadata on %s: %s.\n", 1103 name, strerror(error)); 1104 gctl_error(req, "Not fully done."); 1105 continue; 1106 } 1107 if (verbose) 1108 printf("Metadata cleared on %s.\n", name); 1109 } 1110} 1111 1112static void 1113eli_dump(struct gctl_req *req) 1114{ 1115 struct g_eli_metadata md, tmpmd; 1116 const char *name; 1117 int error, i, nargs; 1118 1119 nargs = gctl_get_int(req, "nargs"); 1120 if (nargs < 1) { 1121 gctl_error(req, "Too few arguments."); 1122 return; 1123 } 1124 1125 for (i = 0; i < nargs; i++) { 1126 name = gctl_get_ascii(req, "arg%d", i); 1127 error = g_metadata_read(name, (unsigned char *)&tmpmd, 1128 sizeof(tmpmd), G_ELI_MAGIC); 1129 if (error != 0) { 1130 fprintf(stderr, "Cannot read metadata from %s: %s.\n", 1131 name, strerror(error)); 1132 gctl_error(req, "Not fully done."); 1133 continue; 1134 } 1135 if (eli_metadata_decode((unsigned char *)&tmpmd, &md) != 0) { 1136 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 1137 name); 1138 gctl_error(req, "Not fully done."); 1139 continue; 1140 } 1141 printf("Metadata on %s:\n", name); 1142 eli_metadata_dump(&md); 1143 printf("\n"); 1144 } 1145} 1146