1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012-2014 Baptiste Daroussin <bapt@FreeBSD.org> 5 * Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/queue.h> 35 #include <sys/types.h> 36 #include <sys/sbuf.h> 37 #include <sys/wait.h> 38 39 #include <archive.h> 40 #include <archive_entry.h> 41 #include <dirent.h> 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <fetch.h> 46 #include <libutil.h> 47 #include <paths.h> 48 #include <stdbool.h> 49 #include <stdlib.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <ucl.h> 54 55 #include <openssl/err.h> 56 #include <openssl/ssl.h> 57 58 #include "dns_utils.h" 59 #include "config.h" 60 61 struct sig_cert { 62 char *name; 63 unsigned char *sig; 64 int siglen; 65 unsigned char *cert; 66 int certlen; 67 bool trusted; 68 }; 69 70 struct pubkey { 71 unsigned char *sig; 72 int siglen; 73 }; 74 75 typedef enum { 76 HASH_UNKNOWN, 77 HASH_SHA256, 78 } hash_t; 79 80 struct fingerprint { 81 hash_t type; 82 char *name; 83 char hash[BUFSIZ]; 84 STAILQ_ENTRY(fingerprint) next; 85 }; 86 87 STAILQ_HEAD(fingerprint_list, fingerprint); 88 89 static int 90 extract_pkg_static(int fd, char *p, int sz) 91 { 92 struct archive *a; 93 struct archive_entry *ae; 94 char *end; 95 int ret, r; 96 97 ret = -1; 98 a = archive_read_new(); 99 if (a == NULL) { 100 warn("archive_read_new"); 101 return (ret); 102 } 103 archive_read_support_filter_all(a); 104 archive_read_support_format_tar(a); 105 106 if (lseek(fd, 0, 0) == -1) { 107 warn("lseek"); 108 goto cleanup; 109 } 110 111 if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { 112 warnx("archive_read_open_fd: %s", archive_error_string(a)); 113 goto cleanup; 114 } 115 116 ae = NULL; 117 while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { 118 end = strrchr(archive_entry_pathname(ae), '/'); 119 if (end == NULL) 120 continue; 121 122 if (strcmp(end, "/pkg-static") == 0) { 123 r = archive_read_extract(a, ae, 124 ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | 125 ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | 126 ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); 127 strlcpy(p, archive_entry_pathname(ae), sz); 128 break; 129 } 130 } 131 132 if (r == ARCHIVE_OK) 133 ret = 0; 134 else 135 warnx("failed to extract pkg-static: %s", 136 archive_error_string(a)); 137 138 cleanup: 139 archive_read_free(a); 140 return (ret); 141 142 } 143 144 static int 145 install_pkg_static(const char *path, const char *pkgpath, bool force) 146 { 147 int pstat; 148 pid_t pid; 149 150 switch ((pid = fork())) { 151 case -1: 152 return (-1); 153 case 0: 154 if (force) 155 execl(path, "pkg-static", "add", "-f", pkgpath, 156 (char *)NULL); 157 else 158 execl(path, "pkg-static", "add", pkgpath, 159 (char *)NULL); 160 _exit(1); 161 default: 162 break; 163 } 164 165 while (waitpid(pid, &pstat, 0) == -1) 166 if (errno != EINTR) 167 return (-1); 168 169 if (WEXITSTATUS(pstat)) 170 return (WEXITSTATUS(pstat)); 171 else if (WIFSIGNALED(pstat)) 172 return (128 & (WTERMSIG(pstat))); 173 return (pstat); 174 } 175 176 static int 177 fetch_to_fd(const char *url, char *path) 178 { 179 struct url *u; 180 struct dns_srvinfo *mirrors, *current; 181 struct url_stat st; 182 FILE *remote; 183 /* To store _https._tcp. + hostname + \0 */ 184 int fd; 185 int retry, max_retry; 186 ssize_t r; 187 char buf[10240]; 188 char zone[MAXHOSTNAMELEN + 13]; 189 static const char *mirror_type = NULL; 190 191 max_retry = 3; 192 current = mirrors = NULL; 193 remote = NULL; 194 195 if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type) 196 != 0) { 197 warnx("No MIRROR_TYPE defined"); 198 return (-1); 199 } 200 201 if ((fd = mkstemp(path)) == -1) { 202 warn("mkstemp()"); 203 return (-1); 204 } 205 206 retry = max_retry; 207 208 if ((u = fetchParseURL(url)) == NULL) { 209 warn("fetchParseURL('%s')", url); 210 return (-1); 211 } 212 213 while (remote == NULL) { 214 if (retry == max_retry) { 215 if (strcmp(u->scheme, "file") != 0 && 216 strcasecmp(mirror_type, "srv") == 0) { 217 snprintf(zone, sizeof(zone), 218 "_%s._tcp.%s", u->scheme, u->host); 219 mirrors = dns_getsrvinfo(zone); 220 current = mirrors; 221 } 222 } 223 224 if (mirrors != NULL) { 225 strlcpy(u->host, current->host, sizeof(u->host)); 226 u->port = current->port; 227 } 228 229 remote = fetchXGet(u, &st, ""); 230 if (remote == NULL) { 231 --retry; 232 if (retry <= 0) 233 goto fetchfail; 234 if (mirrors == NULL) { 235 sleep(1); 236 } else { 237 current = current->next; 238 if (current == NULL) 239 current = mirrors; 240 } 241 } 242 } 243 244 while ((r = fread(buf, 1, sizeof(buf), remote)) > 0) { 245 if (write(fd, buf, r) != r) { 246 warn("write()"); 247 goto fetchfail; 248 } 249 } 250 251 if (r != 0) { 252 warn("An error occurred while fetching pkg(8)"); 253 goto fetchfail; 254 } 255 256 if (ferror(remote)) 257 goto fetchfail; 258 259 goto cleanup; 260 261 fetchfail: 262 if (fd != -1) { 263 close(fd); 264 fd = -1; 265 unlink(path); 266 } 267 268 cleanup: 269 if (remote != NULL) 270 fclose(remote); 271 272 return fd; 273 } 274 275 static struct fingerprint * 276 parse_fingerprint(ucl_object_t *obj) 277 { 278 const ucl_object_t *cur; 279 ucl_object_iter_t it = NULL; 280 const char *function, *fp, *key; 281 struct fingerprint *f; 282 hash_t fct = HASH_UNKNOWN; 283 284 function = fp = NULL; 285 286 while ((cur = ucl_iterate_object(obj, &it, true))) { 287 key = ucl_object_key(cur); 288 if (cur->type != UCL_STRING) 289 continue; 290 if (strcasecmp(key, "function") == 0) { 291 function = ucl_object_tostring(cur); 292 continue; 293 } 294 if (strcasecmp(key, "fingerprint") == 0) { 295 fp = ucl_object_tostring(cur); 296 continue; 297 } 298 } 299 300 if (fp == NULL || function == NULL) 301 return (NULL); 302 303 if (strcasecmp(function, "sha256") == 0) 304 fct = HASH_SHA256; 305 306 if (fct == HASH_UNKNOWN) { 307 warnx("Unsupported hashing function: %s", function); 308 return (NULL); 309 } 310 311 f = calloc(1, sizeof(struct fingerprint)); 312 f->type = fct; 313 strlcpy(f->hash, fp, sizeof(f->hash)); 314 315 return (f); 316 } 317 318 static void 319 free_fingerprint_list(struct fingerprint_list* list) 320 { 321 struct fingerprint *fingerprint, *tmp; 322 323 STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) { 324 free(fingerprint->name); 325 free(fingerprint); 326 } 327 free(list); 328 } 329 330 static struct fingerprint * 331 load_fingerprint(const char *dir, const char *filename) 332 { 333 ucl_object_t *obj = NULL; 334 struct ucl_parser *p = NULL; 335 struct fingerprint *f; 336 char path[MAXPATHLEN]; 337 338 f = NULL; 339 340 snprintf(path, MAXPATHLEN, "%s/%s", dir, filename); 341 342 p = ucl_parser_new(0); 343 if (!ucl_parser_add_file(p, path)) { 344 warnx("%s: %s", path, ucl_parser_get_error(p)); 345 ucl_parser_free(p); 346 return (NULL); 347 } 348 349 obj = ucl_parser_get_object(p); 350 351 if (obj->type == UCL_OBJECT) 352 f = parse_fingerprint(obj); 353 354 if (f != NULL) 355 f->name = strdup(filename); 356 357 ucl_object_unref(obj); 358 ucl_parser_free(p); 359 360 return (f); 361 } 362 363 static struct fingerprint_list * 364 load_fingerprints(const char *path, int *count) 365 { 366 DIR *d; 367 struct dirent *ent; 368 struct fingerprint *finger; 369 struct fingerprint_list *fingerprints; 370 371 *count = 0; 372 373 fingerprints = calloc(1, sizeof(struct fingerprint_list)); 374 if (fingerprints == NULL) 375 return (NULL); 376 STAILQ_INIT(fingerprints); 377 378 if ((d = opendir(path)) == NULL) { 379 free(fingerprints); 380 381 return (NULL); 382 } 383 384 while ((ent = readdir(d))) { 385 if (strcmp(ent->d_name, ".") == 0 || 386 strcmp(ent->d_name, "..") == 0) 387 continue; 388 finger = load_fingerprint(path, ent->d_name); 389 if (finger != NULL) { 390 STAILQ_INSERT_TAIL(fingerprints, finger, next); 391 ++(*count); 392 } 393 } 394 395 closedir(d); 396 397 return (fingerprints); 398 } 399 400 static void 401 sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH], 402 char out[SHA256_DIGEST_LENGTH * 2 + 1]) 403 { 404 int i; 405 406 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) 407 sprintf(out + (i * 2), "%02x", hash[i]); 408 409 out[SHA256_DIGEST_LENGTH * 2] = '\0'; 410 } 411 412 static void 413 sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 414 { 415 unsigned char hash[SHA256_DIGEST_LENGTH]; 416 SHA256_CTX sha256; 417 418 out[0] = '\0'; 419 420 SHA256_Init(&sha256); 421 SHA256_Update(&sha256, buf, len); 422 SHA256_Final(hash, &sha256); 423 sha256_hash(hash, out); 424 } 425 426 static int 427 sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 428 { 429 int my_fd; 430 FILE *fp; 431 char buffer[BUFSIZ]; 432 unsigned char hash[SHA256_DIGEST_LENGTH]; 433 size_t r; 434 int ret; 435 SHA256_CTX sha256; 436 437 my_fd = -1; 438 fp = NULL; 439 r = 0; 440 ret = 1; 441 442 out[0] = '\0'; 443 444 /* Duplicate the fd so that fclose(3) does not close it. */ 445 if ((my_fd = dup(fd)) == -1) { 446 warnx("dup"); 447 goto cleanup; 448 } 449 450 if ((fp = fdopen(my_fd, "rb")) == NULL) { 451 warnx("fdopen"); 452 goto cleanup; 453 } 454 455 SHA256_Init(&sha256); 456 457 while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0) 458 SHA256_Update(&sha256, buffer, r); 459 460 if (ferror(fp) != 0) { 461 warnx("fread"); 462 goto cleanup; 463 } 464 465 SHA256_Final(hash, &sha256); 466 sha256_hash(hash, out); 467 ret = 0; 468 469 cleanup: 470 if (fp != NULL) 471 fclose(fp); 472 else if (my_fd != -1) 473 close(my_fd); 474 (void)lseek(fd, 0, SEEK_SET); 475 476 return (ret); 477 } 478 479 static EVP_PKEY * 480 load_public_key_file(const char *file) 481 { 482 EVP_PKEY *pkey; 483 BIO *bp; 484 char errbuf[1024]; 485 486 bp = BIO_new_file(file, "r"); 487 if (!bp) 488 errx(EXIT_FAILURE, "Unable to read %s", file); 489 490 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 491 warnx("ici: %s", ERR_error_string(ERR_get_error(), errbuf)); 492 493 BIO_free(bp); 494 495 return (pkey); 496 } 497 498 static EVP_PKEY * 499 load_public_key_buf(const unsigned char *cert, int certlen) 500 { 501 EVP_PKEY *pkey; 502 BIO *bp; 503 char errbuf[1024]; 504 505 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen); 506 507 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 508 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 509 510 BIO_free(bp); 511 512 return (pkey); 513 } 514 515 static bool 516 rsa_verify_cert(int fd, const char *sigfile, const unsigned char *key, 517 int keylen, unsigned char *sig, int siglen) 518 { 519 EVP_MD_CTX *mdctx; 520 EVP_PKEY *pkey; 521 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2]; 522 char errbuf[1024]; 523 bool ret; 524 525 pkey = NULL; 526 mdctx = NULL; 527 ret = false; 528 529 SSL_load_error_strings(); 530 531 /* Compute SHA256 of the package. */ 532 if (lseek(fd, 0, 0) == -1) { 533 warn("lseek"); 534 goto cleanup; 535 } 536 if ((sha256_fd(fd, sha256)) == -1) { 537 warnx("Error creating SHA256 hash for package"); 538 goto cleanup; 539 } 540 541 if (sigfile != NULL) { 542 if ((pkey = load_public_key_file(sigfile)) == NULL) { 543 warnx("Error reading public key"); 544 goto cleanup; 545 } 546 } else { 547 if ((pkey = load_public_key_buf(key, keylen)) == NULL) { 548 warnx("Error reading public key"); 549 goto cleanup; 550 } 551 } 552 553 /* Verify signature of the SHA256(pkg) is valid. */ 554 if ((mdctx = EVP_MD_CTX_create()) == NULL) { 555 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 556 goto error; 557 } 558 559 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) { 560 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 561 goto error; 562 } 563 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) { 564 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 565 goto error; 566 } 567 568 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) { 569 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 570 goto error; 571 } 572 573 ret = true; 574 printf("done\n"); 575 goto cleanup; 576 577 error: 578 printf("failed\n"); 579 580 cleanup: 581 if (pkey) 582 EVP_PKEY_free(pkey); 583 if (mdctx) 584 EVP_MD_CTX_destroy(mdctx); 585 ERR_free_strings(); 586 587 return (ret); 588 } 589 590 static struct pubkey * 591 read_pubkey(int fd) 592 { 593 struct pubkey *pk; 594 struct sbuf *sig; 595 char buf[4096]; 596 int r; 597 598 if (lseek(fd, 0, 0) == -1) { 599 warn("lseek"); 600 return (NULL); 601 } 602 603 sig = sbuf_new_auto(); 604 605 while ((r = read(fd, buf, sizeof(buf))) >0) { 606 sbuf_bcat(sig, buf, r); 607 } 608 609 sbuf_finish(sig); 610 pk = calloc(1, sizeof(struct pubkey)); 611 pk->siglen = sbuf_len(sig); 612 pk->sig = calloc(1, pk->siglen); 613 memcpy(pk->sig, sbuf_data(sig), pk->siglen); 614 sbuf_delete(sig); 615 616 return (pk); 617 } 618 619 static struct sig_cert * 620 parse_cert(int fd) { 621 int my_fd; 622 struct sig_cert *sc; 623 FILE *fp; 624 struct sbuf *buf, *sig, *cert; 625 char *line; 626 size_t linecap; 627 ssize_t linelen; 628 629 buf = NULL; 630 my_fd = -1; 631 sc = NULL; 632 line = NULL; 633 linecap = 0; 634 635 if (lseek(fd, 0, 0) == -1) { 636 warn("lseek"); 637 return (NULL); 638 } 639 640 /* Duplicate the fd so that fclose(3) does not close it. */ 641 if ((my_fd = dup(fd)) == -1) { 642 warnx("dup"); 643 return (NULL); 644 } 645 646 if ((fp = fdopen(my_fd, "rb")) == NULL) { 647 warn("fdopen"); 648 close(my_fd); 649 return (NULL); 650 } 651 652 sig = sbuf_new_auto(); 653 cert = sbuf_new_auto(); 654 655 while ((linelen = getline(&line, &linecap, fp)) > 0) { 656 if (strcmp(line, "SIGNATURE\n") == 0) { 657 buf = sig; 658 continue; 659 } else if (strcmp(line, "CERT\n") == 0) { 660 buf = cert; 661 continue; 662 } else if (strcmp(line, "END\n") == 0) { 663 break; 664 } 665 if (buf != NULL) 666 sbuf_bcat(buf, line, linelen); 667 } 668 669 fclose(fp); 670 671 /* Trim out unrelated trailing newline */ 672 sbuf_setpos(sig, sbuf_len(sig) - 1); 673 674 sbuf_finish(sig); 675 sbuf_finish(cert); 676 677 sc = calloc(1, sizeof(struct sig_cert)); 678 sc->siglen = sbuf_len(sig); 679 sc->sig = calloc(1, sc->siglen); 680 memcpy(sc->sig, sbuf_data(sig), sc->siglen); 681 682 sc->certlen = sbuf_len(cert); 683 sc->cert = strdup(sbuf_data(cert)); 684 685 sbuf_delete(sig); 686 sbuf_delete(cert); 687 688 return (sc); 689 } 690 691 static bool 692 verify_pubsignature(int fd_pkg, int fd_sig) 693 { 694 struct pubkey *pk; 695 const char *pubkey; 696 bool ret; 697 698 pk = NULL; 699 pubkey = NULL; 700 ret = false; 701 if (config_string(PUBKEY, &pubkey) != 0) { 702 warnx("No CONFIG_PUBKEY defined"); 703 goto cleanup; 704 } 705 706 if ((pk = read_pubkey(fd_sig)) == NULL) { 707 warnx("Error reading signature"); 708 goto cleanup; 709 } 710 711 /* Verify the signature. */ 712 printf("Verifying signature with public key %s... ", pubkey); 713 if (rsa_verify_cert(fd_pkg, pubkey, NULL, 0, pk->sig, 714 pk->siglen) == false) { 715 fprintf(stderr, "Signature is not valid\n"); 716 goto cleanup; 717 } 718 719 ret = true; 720 721 cleanup: 722 if (pk) { 723 free(pk->sig); 724 free(pk); 725 } 726 727 return (ret); 728 } 729 730 static bool 731 verify_signature(int fd_pkg, int fd_sig) 732 { 733 struct fingerprint_list *trusted, *revoked; 734 struct fingerprint *fingerprint; 735 struct sig_cert *sc; 736 bool ret; 737 int trusted_count, revoked_count; 738 const char *fingerprints; 739 char path[MAXPATHLEN]; 740 char hash[SHA256_DIGEST_LENGTH * 2 + 1]; 741 742 sc = NULL; 743 trusted = revoked = NULL; 744 ret = false; 745 746 /* Read and parse fingerprints. */ 747 if (config_string(FINGERPRINTS, &fingerprints) != 0) { 748 warnx("No CONFIG_FINGERPRINTS defined"); 749 goto cleanup; 750 } 751 752 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints); 753 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) { 754 warnx("Error loading trusted certificates"); 755 goto cleanup; 756 } 757 758 if (trusted_count == 0 || trusted == NULL) { 759 fprintf(stderr, "No trusted certificates found.\n"); 760 goto cleanup; 761 } 762 763 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints); 764 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) { 765 warnx("Error loading revoked certificates"); 766 goto cleanup; 767 } 768 769 /* Read certificate and signature in. */ 770 if ((sc = parse_cert(fd_sig)) == NULL) { 771 warnx("Error parsing certificate"); 772 goto cleanup; 773 } 774 /* Explicitly mark as non-trusted until proven otherwise. */ 775 sc->trusted = false; 776 777 /* Parse signature and pubkey out of the certificate */ 778 sha256_buf(sc->cert, sc->certlen, hash); 779 780 /* Check if this hash is revoked */ 781 if (revoked != NULL) { 782 STAILQ_FOREACH(fingerprint, revoked, next) { 783 if (strcasecmp(fingerprint->hash, hash) == 0) { 784 fprintf(stderr, "The package was signed with " 785 "revoked certificate %s\n", 786 fingerprint->name); 787 goto cleanup; 788 } 789 } 790 } 791 792 STAILQ_FOREACH(fingerprint, trusted, next) { 793 if (strcasecmp(fingerprint->hash, hash) == 0) { 794 sc->trusted = true; 795 sc->name = strdup(fingerprint->name); 796 break; 797 } 798 } 799 800 if (sc->trusted == false) { 801 fprintf(stderr, "No trusted fingerprint found matching " 802 "package's certificate\n"); 803 goto cleanup; 804 } 805 806 /* Verify the signature. */ 807 printf("Verifying signature with trusted certificate %s... ", sc->name); 808 if (rsa_verify_cert(fd_pkg, NULL, sc->cert, sc->certlen, sc->sig, 809 sc->siglen) == false) { 810 fprintf(stderr, "Signature is not valid\n"); 811 goto cleanup; 812 } 813 814 ret = true; 815 816 cleanup: 817 if (trusted) 818 free_fingerprint_list(trusted); 819 if (revoked) 820 free_fingerprint_list(revoked); 821 if (sc) { 822 free(sc->cert); 823 free(sc->sig); 824 free(sc->name); 825 free(sc); 826 } 827 828 return (ret); 829 } 830 831 static int 832 bootstrap_pkg(bool force) 833 { 834 int fd_pkg, fd_sig; 835 int ret; 836 char url[MAXPATHLEN]; 837 char tmppkg[MAXPATHLEN]; 838 char tmpsig[MAXPATHLEN]; 839 const char *packagesite; 840 const char *signature_type; 841 char pkgstatic[MAXPATHLEN]; 842 843 fd_sig = -1; 844 ret = -1; 845 846 if (config_string(PACKAGESITE, &packagesite) != 0) { 847 warnx("No PACKAGESITE defined"); 848 return (-1); 849 } 850 851 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 852 warnx("Error looking up SIGNATURE_TYPE"); 853 return (-1); 854 } 855 856 printf("Bootstrapping pkg from %s, please wait...\n", packagesite); 857 858 /* Support pkg+http:// for PACKAGESITE which is the new format 859 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has 860 no A record. */ 861 if (strncmp(URL_SCHEME_PREFIX, packagesite, 862 strlen(URL_SCHEME_PREFIX)) == 0) 863 packagesite += strlen(URL_SCHEME_PREFIX); 864 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite); 865 866 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 867 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 868 869 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1) 870 goto fetchfail; 871 872 if (signature_type != NULL && 873 strcasecmp(signature_type, "NONE") != 0) { 874 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) { 875 876 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX", 877 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 878 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig", 879 packagesite); 880 881 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 882 fprintf(stderr, "Signature for pkg not " 883 "available.\n"); 884 goto fetchfail; 885 } 886 887 if (verify_signature(fd_pkg, fd_sig) == false) 888 goto cleanup; 889 } else if (strcasecmp(signature_type, "PUBKEY") == 0) { 890 891 snprintf(tmpsig, MAXPATHLEN, 892 "%s/pkg.txz.pubkeysig.XXXXXX", 893 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 894 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.pubkeysig", 895 packagesite); 896 897 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 898 fprintf(stderr, "Signature for pkg not " 899 "available.\n"); 900 goto fetchfail; 901 } 902 903 if (verify_pubsignature(fd_pkg, fd_sig) == false) 904 goto cleanup; 905 } else { 906 warnx("Signature type %s is not supported for " 907 "bootstrapping.", signature_type); 908 goto cleanup; 909 } 910 } 911 912 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 913 ret = install_pkg_static(pkgstatic, tmppkg, force); 914 915 goto cleanup; 916 917 fetchfail: 918 warnx("Error fetching %s: %s", url, fetchLastErrString); 919 if (fetchLastErrCode == FETCH_RESOLV) { 920 fprintf(stderr, "Address resolution failed for %s.\n", packagesite); 921 fprintf(stderr, "Consider changing PACKAGESITE.\n"); 922 } else { 923 fprintf(stderr, "A pre-built version of pkg could not be found for " 924 "your system.\n"); 925 fprintf(stderr, "Consider changing PACKAGESITE or installing it from " 926 "ports: 'ports-mgmt/pkg'.\n"); 927 } 928 929 cleanup: 930 if (fd_sig != -1) { 931 close(fd_sig); 932 unlink(tmpsig); 933 } 934 935 if (fd_pkg != -1) { 936 close(fd_pkg); 937 unlink(tmppkg); 938 } 939 940 return (ret); 941 } 942 943 static const char confirmation_message[] = 944 "The package management tool is not yet installed on your system.\n" 945 "Do you want to fetch and install it now? [y/N]: "; 946 947 static const char non_interactive_message[] = 948 "The package management tool is not yet installed on your system.\n" 949 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap " 950 "in non-interactive (stdin not being a tty)\n"; 951 952 static int 953 pkg_query_yes_no(void) 954 { 955 int ret, c; 956 957 fflush(stdout); 958 c = getchar(); 959 960 if (c == 'y' || c == 'Y') 961 ret = 1; 962 else 963 ret = 0; 964 965 while (c != '\n' && c != EOF) 966 c = getchar(); 967 968 return (ret); 969 } 970 971 static int 972 bootstrap_pkg_local(const char *pkgpath, bool force) 973 { 974 char path[MAXPATHLEN]; 975 char pkgstatic[MAXPATHLEN]; 976 const char *signature_type; 977 int fd_pkg, fd_sig, ret; 978 979 fd_sig = -1; 980 ret = -1; 981 982 fd_pkg = open(pkgpath, O_RDONLY); 983 if (fd_pkg == -1) 984 err(EXIT_FAILURE, "Unable to open %s", pkgpath); 985 986 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 987 warnx("Error looking up SIGNATURE_TYPE"); 988 goto cleanup; 989 } 990 if (signature_type != NULL && 991 strcasecmp(signature_type, "NONE") != 0) { 992 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) { 993 994 snprintf(path, sizeof(path), "%s.sig", pkgpath); 995 996 if ((fd_sig = open(path, O_RDONLY)) == -1) { 997 fprintf(stderr, "Signature for pkg not " 998 "available.\n"); 999 goto cleanup; 1000 } 1001 1002 if (verify_signature(fd_pkg, fd_sig) == false) 1003 goto cleanup; 1004 1005 } else if (strcasecmp(signature_type, "PUBKEY") == 0) { 1006 1007 snprintf(path, sizeof(path), "%s.pubkeysig", pkgpath); 1008 1009 if ((fd_sig = open(path, O_RDONLY)) == -1) { 1010 fprintf(stderr, "Signature for pkg not " 1011 "available.\n"); 1012 goto cleanup; 1013 } 1014 1015 if (verify_pubsignature(fd_pkg, fd_sig) == false) 1016 goto cleanup; 1017 1018 } else { 1019 warnx("Signature type %s is not supported for " 1020 "bootstrapping.", signature_type); 1021 goto cleanup; 1022 } 1023 } 1024 1025 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 1026 ret = install_pkg_static(pkgstatic, pkgpath, force); 1027 1028 cleanup: 1029 close(fd_pkg); 1030 if (fd_sig != -1) 1031 close(fd_sig); 1032 1033 return (ret); 1034 } 1035 1036 int 1037 main(int argc, char *argv[]) 1038 { 1039 char pkgpath[MAXPATHLEN]; 1040 const char *pkgarg; 1041 size_t len; 1042 int i; 1043 bool bootstrap_only, force, yes; 1044 1045 bootstrap_only = false; 1046 force = false; 1047 pkgarg = NULL; 1048 yes = false; 1049 1050 if ((len = getlocalbase(pkgpath, MAXPATHLEN)) != 0) { 1051 fprintf(stderr, "Cannot determine local path\n"); 1052 exit(EXIT_FAILURE); 1053 } 1054 strlcat(pkgpath, "/sbin/pkg", MAXPATHLEN - len); 1055 1056 if (argc > 1 && strcmp(argv[1], "bootstrap") == 0) { 1057 bootstrap_only = true; 1058 if (argc > 3) { 1059 fprintf(stderr, "Too many arguments\nUsage: pkg bootstrap [-f]\n"); 1060 exit(EXIT_FAILURE); 1061 } 1062 if (argc == 3 && strcmp(argv[2], "-f") == 0) { 1063 force = true; 1064 } else if (argc == 3) { 1065 fprintf(stderr, "Invalid argument specified\nUsage: pkg bootstrap [-f]\n"); 1066 exit(EXIT_FAILURE); 1067 } 1068 } 1069 1070 if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) { 1071 /* 1072 * To allow 'pkg -N' to be used as a reliable test for whether 1073 * a system is configured to use pkg, don't bootstrap pkg 1074 * when that argument is given as argv[1]. 1075 */ 1076 if (argv[1] != NULL && strcmp(argv[1], "-N") == 0) 1077 errx(EXIT_FAILURE, "pkg is not installed"); 1078 1079 config_init(); 1080 1081 if (argc > 1 && strcmp(argv[1], "add") == 0) { 1082 if (argc > 2 && strcmp(argv[2], "-f") == 0) { 1083 force = true; 1084 pkgarg = argv[3]; 1085 } else 1086 pkgarg = argv[2]; 1087 if (pkgarg == NULL) { 1088 fprintf(stderr, "Path to pkg.txz required\n"); 1089 exit(EXIT_FAILURE); 1090 } 1091 if (access(pkgarg, R_OK) == -1) { 1092 fprintf(stderr, "No such file: %s\n", pkgarg); 1093 exit(EXIT_FAILURE); 1094 } 1095 if (bootstrap_pkg_local(pkgarg, force) != 0) 1096 exit(EXIT_FAILURE); 1097 exit(EXIT_SUCCESS); 1098 } 1099 /* 1100 * Do not ask for confirmation if either of stdin or stdout is 1101 * not tty. Check the environment to see if user has answer 1102 * tucked in there already. 1103 */ 1104 config_bool(ASSUME_ALWAYS_YES, &yes); 1105 if (!yes) { 1106 for (i = 1; i < argc; i++) { 1107 if (strcmp(argv[i], "-y") == 0 || 1108 strcmp(argv[i], "--yes") == 0) { 1109 yes = true; 1110 break; 1111 } 1112 } 1113 } 1114 if (!yes) { 1115 if (!isatty(fileno(stdin))) { 1116 fprintf(stderr, non_interactive_message); 1117 exit(EXIT_FAILURE); 1118 } 1119 1120 printf("%s", confirmation_message); 1121 if (pkg_query_yes_no() == 0) 1122 exit(EXIT_FAILURE); 1123 } 1124 if (bootstrap_pkg(force) != 0) 1125 exit(EXIT_FAILURE); 1126 config_finish(); 1127 1128 if (bootstrap_only) 1129 exit(EXIT_SUCCESS); 1130 } else if (bootstrap_only) { 1131 printf("pkg already bootstrapped at %s\n", pkgpath); 1132 exit(EXIT_SUCCESS); 1133 } 1134 1135 execv(pkgpath, argv); 1136 1137 /* NOT REACHED */ 1138 return (EXIT_FAILURE); 1139 } 1140