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