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 #define _WITH_GETLINE 38 #include <archive.h> 39 #include <archive_entry.h> 40 #include <dirent.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <fetch.h> 45 #include <paths.h> 46 #include <stdbool.h> 47 #include <stdlib.h> 48 #include <stdio.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <ucl.h> 52 53 #include <openssl/err.h> 54 #include <openssl/ssl.h> 55 56 #include "dns_utils.h" 57 #include "config.h" 58 59 struct sig_cert { 60 char *name; 61 unsigned char *sig; 62 int siglen; 63 unsigned char *cert; 64 int certlen; 65 bool trusted; 66 }; 67 68 struct pubkey { 69 unsigned char *sig; 70 int siglen; 71 }; 72 73 typedef enum { 74 HASH_UNKNOWN, 75 HASH_SHA256, 76 } hash_t; 77 78 struct fingerprint { 79 hash_t type; 80 char *name; 81 char hash[BUFSIZ]; 82 STAILQ_ENTRY(fingerprint) next; 83 }; 84 85 STAILQ_HEAD(fingerprint_list, fingerprint); 86 87 static int 88 extract_pkg_static(int fd, char *p, int sz) 89 { 90 struct archive *a; 91 struct archive_entry *ae; 92 char *end; 93 int ret, r; 94 95 ret = -1; 96 a = archive_read_new(); 97 if (a == NULL) { 98 warn("archive_read_new"); 99 return (ret); 100 } 101 archive_read_support_filter_all(a); 102 archive_read_support_format_tar(a); 103 104 if (lseek(fd, 0, 0) == -1) { 105 warn("lseek"); 106 goto cleanup; 107 } 108 109 if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { 110 warnx("archive_read_open_fd: %s", archive_error_string(a)); 111 goto cleanup; 112 } 113 114 ae = NULL; 115 while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { 116 end = strrchr(archive_entry_pathname(ae), '/'); 117 if (end == NULL) 118 continue; 119 120 if (strcmp(end, "/pkg-static") == 0) { 121 r = archive_read_extract(a, ae, 122 ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | 123 ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | 124 ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); 125 strlcpy(p, archive_entry_pathname(ae), sz); 126 break; 127 } 128 } 129 130 if (r == ARCHIVE_OK) 131 ret = 0; 132 else 133 warnx("failed to extract pkg-static: %s", 134 archive_error_string(a)); 135 136 cleanup: 137 archive_read_free(a); 138 return (ret); 139 140 } 141 142 static int 143 install_pkg_static(const char *path, const char *pkgpath, bool force) 144 { 145 int pstat; 146 pid_t pid; 147 148 switch ((pid = fork())) { 149 case -1: 150 return (-1); 151 case 0: 152 if (force) 153 execl(path, "pkg-static", "add", "-f", pkgpath, 154 (char *)NULL); 155 else 156 execl(path, "pkg-static", "add", pkgpath, 157 (char *)NULL); 158 _exit(1); 159 default: 160 break; 161 } 162 163 while (waitpid(pid, &pstat, 0) == -1) 164 if (errno != EINTR) 165 return (-1); 166 167 if (WEXITSTATUS(pstat)) 168 return (WEXITSTATUS(pstat)); 169 else if (WIFSIGNALED(pstat)) 170 return (128 & (WTERMSIG(pstat))); 171 return (pstat); 172 } 173 174 static int 175 fetch_to_fd(const char *url, char *path) 176 { 177 struct url *u; 178 struct dns_srvinfo *mirrors, *current; 179 struct url_stat st; 180 FILE *remote; 181 /* To store _https._tcp. + hostname + \0 */ 182 int fd; 183 int retry, max_retry; 184 ssize_t r; 185 char buf[10240]; 186 char zone[MAXHOSTNAMELEN + 13]; 187 static const char *mirror_type = NULL; 188 189 max_retry = 3; 190 current = mirrors = NULL; 191 remote = NULL; 192 193 if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type) 194 != 0) { 195 warnx("No MIRROR_TYPE defined"); 196 return (-1); 197 } 198 199 if ((fd = mkstemp(path)) == -1) { 200 warn("mkstemp()"); 201 return (-1); 202 } 203 204 retry = max_retry; 205 206 if ((u = fetchParseURL(url)) == NULL) { 207 warn("fetchParseURL('%s')", url); 208 return (-1); 209 } 210 211 while (remote == NULL) { 212 if (retry == max_retry) { 213 if (strcmp(u->scheme, "file") != 0 && 214 strcasecmp(mirror_type, "srv") == 0) { 215 snprintf(zone, sizeof(zone), 216 "_%s._tcp.%s", u->scheme, u->host); 217 mirrors = dns_getsrvinfo(zone); 218 current = mirrors; 219 } 220 } 221 222 if (mirrors != NULL) { 223 strlcpy(u->host, current->host, sizeof(u->host)); 224 u->port = current->port; 225 } 226 227 remote = fetchXGet(u, &st, ""); 228 if (remote == NULL) { 229 --retry; 230 if (retry <= 0) 231 goto fetchfail; 232 if (mirrors == NULL) { 233 sleep(1); 234 } else { 235 current = current->next; 236 if (current == NULL) 237 current = mirrors; 238 } 239 } 240 } 241 242 while ((r = fread(buf, 1, sizeof(buf), remote)) > 0) { 243 if (write(fd, buf, r) != r) { 244 warn("write()"); 245 goto fetchfail; 246 } 247 } 248 249 if (r != 0) { 250 warn("An error occurred while fetching pkg(8)"); 251 goto fetchfail; 252 } 253 254 if (ferror(remote)) 255 goto fetchfail; 256 257 goto cleanup; 258 259 fetchfail: 260 if (fd != -1) { 261 close(fd); 262 fd = -1; 263 unlink(path); 264 } 265 266 cleanup: 267 if (remote != NULL) 268 fclose(remote); 269 270 return fd; 271 } 272 273 static struct fingerprint * 274 parse_fingerprint(ucl_object_t *obj) 275 { 276 const ucl_object_t *cur; 277 ucl_object_iter_t it = NULL; 278 const char *function, *fp, *key; 279 struct fingerprint *f; 280 hash_t fct = HASH_UNKNOWN; 281 282 function = fp = NULL; 283 284 while ((cur = ucl_iterate_object(obj, &it, true))) { 285 key = ucl_object_key(cur); 286 if (cur->type != UCL_STRING) 287 continue; 288 if (strcasecmp(key, "function") == 0) { 289 function = ucl_object_tostring(cur); 290 continue; 291 } 292 if (strcasecmp(key, "fingerprint") == 0) { 293 fp = ucl_object_tostring(cur); 294 continue; 295 } 296 } 297 298 if (fp == NULL || function == NULL) 299 return (NULL); 300 301 if (strcasecmp(function, "sha256") == 0) 302 fct = HASH_SHA256; 303 304 if (fct == HASH_UNKNOWN) { 305 warnx("Unsupported hashing function: %s", function); 306 return (NULL); 307 } 308 309 f = calloc(1, sizeof(struct fingerprint)); 310 f->type = fct; 311 strlcpy(f->hash, fp, sizeof(f->hash)); 312 313 return (f); 314 } 315 316 static void 317 free_fingerprint_list(struct fingerprint_list* list) 318 { 319 struct fingerprint *fingerprint, *tmp; 320 321 STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) { 322 free(fingerprint->name); 323 free(fingerprint); 324 } 325 free(list); 326 } 327 328 static struct fingerprint * 329 load_fingerprint(const char *dir, const char *filename) 330 { 331 ucl_object_t *obj = NULL; 332 struct ucl_parser *p = NULL; 333 struct fingerprint *f; 334 char path[MAXPATHLEN]; 335 336 f = NULL; 337 338 snprintf(path, MAXPATHLEN, "%s/%s", dir, filename); 339 340 p = ucl_parser_new(0); 341 if (!ucl_parser_add_file(p, path)) { 342 warnx("%s: %s", path, ucl_parser_get_error(p)); 343 ucl_parser_free(p); 344 return (NULL); 345 } 346 347 obj = ucl_parser_get_object(p); 348 349 if (obj->type == UCL_OBJECT) 350 f = parse_fingerprint(obj); 351 352 if (f != NULL) 353 f->name = strdup(filename); 354 355 ucl_object_unref(obj); 356 ucl_parser_free(p); 357 358 return (f); 359 } 360 361 static struct fingerprint_list * 362 load_fingerprints(const char *path, int *count) 363 { 364 DIR *d; 365 struct dirent *ent; 366 struct fingerprint *finger; 367 struct fingerprint_list *fingerprints; 368 369 *count = 0; 370 371 fingerprints = calloc(1, sizeof(struct fingerprint_list)); 372 if (fingerprints == NULL) 373 return (NULL); 374 STAILQ_INIT(fingerprints); 375 376 if ((d = opendir(path)) == NULL) { 377 free(fingerprints); 378 379 return (NULL); 380 } 381 382 while ((ent = readdir(d))) { 383 if (strcmp(ent->d_name, ".") == 0 || 384 strcmp(ent->d_name, "..") == 0) 385 continue; 386 finger = load_fingerprint(path, ent->d_name); 387 if (finger != NULL) { 388 STAILQ_INSERT_TAIL(fingerprints, finger, next); 389 ++(*count); 390 } 391 } 392 393 closedir(d); 394 395 return (fingerprints); 396 } 397 398 static void 399 sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH], 400 char out[SHA256_DIGEST_LENGTH * 2 + 1]) 401 { 402 int i; 403 404 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) 405 sprintf(out + (i * 2), "%02x", hash[i]); 406 407 out[SHA256_DIGEST_LENGTH * 2] = '\0'; 408 } 409 410 static void 411 sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 412 { 413 unsigned char hash[SHA256_DIGEST_LENGTH]; 414 SHA256_CTX sha256; 415 416 out[0] = '\0'; 417 418 SHA256_Init(&sha256); 419 SHA256_Update(&sha256, buf, len); 420 SHA256_Final(hash, &sha256); 421 sha256_hash(hash, out); 422 } 423 424 static int 425 sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 426 { 427 int my_fd; 428 FILE *fp; 429 char buffer[BUFSIZ]; 430 unsigned char hash[SHA256_DIGEST_LENGTH]; 431 size_t r; 432 int ret; 433 SHA256_CTX sha256; 434 435 my_fd = -1; 436 fp = NULL; 437 r = 0; 438 ret = 1; 439 440 out[0] = '\0'; 441 442 /* Duplicate the fd so that fclose(3) does not close it. */ 443 if ((my_fd = dup(fd)) == -1) { 444 warnx("dup"); 445 goto cleanup; 446 } 447 448 if ((fp = fdopen(my_fd, "rb")) == NULL) { 449 warnx("fdopen"); 450 goto cleanup; 451 } 452 453 SHA256_Init(&sha256); 454 455 while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0) 456 SHA256_Update(&sha256, buffer, r); 457 458 if (ferror(fp) != 0) { 459 warnx("fread"); 460 goto cleanup; 461 } 462 463 SHA256_Final(hash, &sha256); 464 sha256_hash(hash, out); 465 ret = 0; 466 467 cleanup: 468 if (fp != NULL) 469 fclose(fp); 470 else if (my_fd != -1) 471 close(my_fd); 472 (void)lseek(fd, 0, SEEK_SET); 473 474 return (ret); 475 } 476 477 static EVP_PKEY * 478 load_public_key_file(const char *file) 479 { 480 EVP_PKEY *pkey; 481 BIO *bp; 482 char errbuf[1024]; 483 484 bp = BIO_new_file(file, "r"); 485 if (!bp) 486 errx(EXIT_FAILURE, "Unable to read %s", file); 487 488 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 489 warnx("ici: %s", ERR_error_string(ERR_get_error(), errbuf)); 490 491 BIO_free(bp); 492 493 return (pkey); 494 } 495 496 static EVP_PKEY * 497 load_public_key_buf(const unsigned char *cert, int certlen) 498 { 499 EVP_PKEY *pkey; 500 BIO *bp; 501 char errbuf[1024]; 502 503 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen); 504 505 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 506 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 507 508 BIO_free(bp); 509 510 return (pkey); 511 } 512 513 static bool 514 rsa_verify_cert(int fd, const char *sigfile, const unsigned char *key, 515 int keylen, unsigned char *sig, int siglen) 516 { 517 EVP_MD_CTX *mdctx; 518 EVP_PKEY *pkey; 519 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2]; 520 char errbuf[1024]; 521 bool ret; 522 523 pkey = NULL; 524 mdctx = NULL; 525 ret = false; 526 527 SSL_load_error_strings(); 528 529 /* Compute SHA256 of the package. */ 530 if (lseek(fd, 0, 0) == -1) { 531 warn("lseek"); 532 goto cleanup; 533 } 534 if ((sha256_fd(fd, sha256)) == -1) { 535 warnx("Error creating SHA256 hash for package"); 536 goto cleanup; 537 } 538 539 if (sigfile != NULL) { 540 if ((pkey = load_public_key_file(sigfile)) == NULL) { 541 warnx("Error reading public key"); 542 goto cleanup; 543 } 544 } else { 545 if ((pkey = load_public_key_buf(key, keylen)) == NULL) { 546 warnx("Error reading public key"); 547 goto cleanup; 548 } 549 } 550 551 /* Verify signature of the SHA256(pkg) is valid. */ 552 if ((mdctx = EVP_MD_CTX_create()) == NULL) { 553 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 554 goto error; 555 } 556 557 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) { 558 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 559 goto error; 560 } 561 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) { 562 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 563 goto error; 564 } 565 566 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) { 567 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 568 goto error; 569 } 570 571 ret = true; 572 printf("done\n"); 573 goto cleanup; 574 575 error: 576 printf("failed\n"); 577 578 cleanup: 579 if (pkey) 580 EVP_PKEY_free(pkey); 581 if (mdctx) 582 EVP_MD_CTX_destroy(mdctx); 583 ERR_free_strings(); 584 585 return (ret); 586 } 587 588 static struct pubkey * 589 read_pubkey(int fd) 590 { 591 struct pubkey *pk; 592 struct sbuf *sig; 593 char buf[4096]; 594 int r; 595 596 if (lseek(fd, 0, 0) == -1) { 597 warn("lseek"); 598 return (NULL); 599 } 600 601 sig = sbuf_new_auto(); 602 603 while ((r = read(fd, buf, sizeof(buf))) >0) { 604 sbuf_bcat(sig, buf, r); 605 } 606 607 sbuf_finish(sig); 608 pk = calloc(1, sizeof(struct pubkey)); 609 pk->siglen = sbuf_len(sig); 610 pk->sig = calloc(1, pk->siglen); 611 memcpy(pk->sig, sbuf_data(sig), pk->siglen); 612 sbuf_delete(sig); 613 614 return (pk); 615 } 616 617 static struct sig_cert * 618 parse_cert(int fd) { 619 int my_fd; 620 struct sig_cert *sc; 621 FILE *fp; 622 struct sbuf *buf, *sig, *cert; 623 char *line; 624 size_t linecap; 625 ssize_t linelen; 626 627 buf = NULL; 628 my_fd = -1; 629 sc = NULL; 630 line = NULL; 631 linecap = 0; 632 633 if (lseek(fd, 0, 0) == -1) { 634 warn("lseek"); 635 return (NULL); 636 } 637 638 /* Duplicate the fd so that fclose(3) does not close it. */ 639 if ((my_fd = dup(fd)) == -1) { 640 warnx("dup"); 641 return (NULL); 642 } 643 644 if ((fp = fdopen(my_fd, "rb")) == NULL) { 645 warn("fdopen"); 646 close(my_fd); 647 return (NULL); 648 } 649 650 sig = sbuf_new_auto(); 651 cert = sbuf_new_auto(); 652 653 while ((linelen = getline(&line, &linecap, fp)) > 0) { 654 if (strcmp(line, "SIGNATURE\n") == 0) { 655 buf = sig; 656 continue; 657 } else if (strcmp(line, "CERT\n") == 0) { 658 buf = cert; 659 continue; 660 } else if (strcmp(line, "END\n") == 0) { 661 break; 662 } 663 if (buf != NULL) 664 sbuf_bcat(buf, line, linelen); 665 } 666 667 fclose(fp); 668 669 /* Trim out unrelated trailing newline */ 670 sbuf_setpos(sig, sbuf_len(sig) - 1); 671 672 sbuf_finish(sig); 673 sbuf_finish(cert); 674 675 sc = calloc(1, sizeof(struct sig_cert)); 676 sc->siglen = sbuf_len(sig); 677 sc->sig = calloc(1, sc->siglen); 678 memcpy(sc->sig, sbuf_data(sig), sc->siglen); 679 680 sc->certlen = sbuf_len(cert); 681 sc->cert = strdup(sbuf_data(cert)); 682 683 sbuf_delete(sig); 684 sbuf_delete(cert); 685 686 return (sc); 687 } 688 689 static bool 690 verify_pubsignature(int fd_pkg, int fd_sig) 691 { 692 struct pubkey *pk; 693 const char *pubkey; 694 bool ret; 695 696 pk = NULL; 697 pubkey = NULL; 698 ret = false; 699 if (config_string(PUBKEY, &pubkey) != 0) { 700 warnx("No CONFIG_PUBKEY defined"); 701 goto cleanup; 702 } 703 704 if ((pk = read_pubkey(fd_sig)) == NULL) { 705 warnx("Error reading signature"); 706 goto cleanup; 707 } 708 709 /* Verify the signature. */ 710 printf("Verifying signature with public key %s... ", pubkey); 711 if (rsa_verify_cert(fd_pkg, pubkey, NULL, 0, pk->sig, 712 pk->siglen) == false) { 713 fprintf(stderr, "Signature is not valid\n"); 714 goto cleanup; 715 } 716 717 ret = true; 718 719 cleanup: 720 if (pk) { 721 free(pk->sig); 722 free(pk); 723 } 724 725 return (ret); 726 } 727 728 static bool 729 verify_signature(int fd_pkg, int fd_sig) 730 { 731 struct fingerprint_list *trusted, *revoked; 732 struct fingerprint *fingerprint; 733 struct sig_cert *sc; 734 bool ret; 735 int trusted_count, revoked_count; 736 const char *fingerprints; 737 char path[MAXPATHLEN]; 738 char hash[SHA256_DIGEST_LENGTH * 2 + 1]; 739 740 sc = NULL; 741 trusted = revoked = NULL; 742 ret = false; 743 744 /* Read and parse fingerprints. */ 745 if (config_string(FINGERPRINTS, &fingerprints) != 0) { 746 warnx("No CONFIG_FINGERPRINTS defined"); 747 goto cleanup; 748 } 749 750 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints); 751 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) { 752 warnx("Error loading trusted certificates"); 753 goto cleanup; 754 } 755 756 if (trusted_count == 0 || trusted == NULL) { 757 fprintf(stderr, "No trusted certificates found.\n"); 758 goto cleanup; 759 } 760 761 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints); 762 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) { 763 warnx("Error loading revoked certificates"); 764 goto cleanup; 765 } 766 767 /* Read certificate and signature in. */ 768 if ((sc = parse_cert(fd_sig)) == NULL) { 769 warnx("Error parsing certificate"); 770 goto cleanup; 771 } 772 /* Explicitly mark as non-trusted until proven otherwise. */ 773 sc->trusted = false; 774 775 /* Parse signature and pubkey out of the certificate */ 776 sha256_buf(sc->cert, sc->certlen, hash); 777 778 /* Check if this hash is revoked */ 779 if (revoked != NULL) { 780 STAILQ_FOREACH(fingerprint, revoked, next) { 781 if (strcasecmp(fingerprint->hash, hash) == 0) { 782 fprintf(stderr, "The package was signed with " 783 "revoked certificate %s\n", 784 fingerprint->name); 785 goto cleanup; 786 } 787 } 788 } 789 790 STAILQ_FOREACH(fingerprint, trusted, next) { 791 if (strcasecmp(fingerprint->hash, hash) == 0) { 792 sc->trusted = true; 793 sc->name = strdup(fingerprint->name); 794 break; 795 } 796 } 797 798 if (sc->trusted == false) { 799 fprintf(stderr, "No trusted fingerprint found matching " 800 "package's certificate\n"); 801 goto cleanup; 802 } 803 804 /* Verify the signature. */ 805 printf("Verifying signature with trusted certificate %s... ", sc->name); 806 if (rsa_verify_cert(fd_pkg, NULL, sc->cert, sc->certlen, sc->sig, 807 sc->siglen) == false) { 808 fprintf(stderr, "Signature is not valid\n"); 809 goto cleanup; 810 } 811 812 ret = true; 813 814 cleanup: 815 if (trusted) 816 free_fingerprint_list(trusted); 817 if (revoked) 818 free_fingerprint_list(revoked); 819 if (sc) { 820 free(sc->cert); 821 free(sc->sig); 822 free(sc->name); 823 free(sc); 824 } 825 826 return (ret); 827 } 828 829 static int 830 bootstrap_pkg(bool force) 831 { 832 int fd_pkg, fd_sig; 833 int ret; 834 char url[MAXPATHLEN]; 835 char tmppkg[MAXPATHLEN]; 836 char tmpsig[MAXPATHLEN]; 837 const char *packagesite; 838 const char *signature_type; 839 char pkgstatic[MAXPATHLEN]; 840 841 fd_sig = -1; 842 ret = -1; 843 844 if (config_string(PACKAGESITE, &packagesite) != 0) { 845 warnx("No PACKAGESITE defined"); 846 return (-1); 847 } 848 849 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 850 warnx("Error looking up SIGNATURE_TYPE"); 851 return (-1); 852 } 853 854 printf("Bootstrapping pkg from %s, please wait...\n", packagesite); 855 856 /* Support pkg+http:// for PACKAGESITE which is the new format 857 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has 858 no A record. */ 859 if (strncmp(URL_SCHEME_PREFIX, packagesite, 860 strlen(URL_SCHEME_PREFIX)) == 0) 861 packagesite += strlen(URL_SCHEME_PREFIX); 862 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite); 863 864 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 865 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 866 867 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1) 868 goto fetchfail; 869 870 if (signature_type != NULL && 871 strcasecmp(signature_type, "NONE") != 0) { 872 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) { 873 874 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX", 875 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 876 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig", 877 packagesite); 878 879 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 880 fprintf(stderr, "Signature for pkg not " 881 "available.\n"); 882 goto fetchfail; 883 } 884 885 if (verify_signature(fd_pkg, fd_sig) == false) 886 goto cleanup; 887 } else if (strcasecmp(signature_type, "PUBKEY") == 0) { 888 889 snprintf(tmpsig, MAXPATHLEN, 890 "%s/pkg.txz.pubkeysig.XXXXXX", 891 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 892 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.pubkeysig", 893 packagesite); 894 895 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 896 fprintf(stderr, "Signature for pkg not " 897 "available.\n"); 898 goto fetchfail; 899 } 900 901 if (verify_pubsignature(fd_pkg, fd_sig) == false) 902 goto cleanup; 903 } else { 904 warnx("Signature type %s is not supported for " 905 "bootstrapping.", signature_type); 906 goto cleanup; 907 } 908 } 909 910 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 911 ret = install_pkg_static(pkgstatic, tmppkg, force); 912 913 goto cleanup; 914 915 fetchfail: 916 warnx("Error fetching %s: %s", url, fetchLastErrString); 917 fprintf(stderr, "A pre-built version of pkg could not be found for " 918 "your system.\n"); 919 fprintf(stderr, "Consider changing PACKAGESITE or installing it from " 920 "ports: 'ports-mgmt/pkg'.\n"); 921 922 cleanup: 923 if (fd_sig != -1) { 924 close(fd_sig); 925 unlink(tmpsig); 926 } 927 928 if (fd_pkg != -1) { 929 close(fd_pkg); 930 unlink(tmppkg); 931 } 932 933 return (ret); 934 } 935 936 static const char confirmation_message[] = 937 "The package management tool is not yet installed on your system.\n" 938 "Do you want to fetch and install it now? [y/N]: "; 939 940 static const char non_interactive_message[] = 941 "The package management tool is not yet installed on your system.\n" 942 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap " 943 "in non-interactive (stdin not being a tty)\n"; 944 945 static int 946 pkg_query_yes_no(void) 947 { 948 int ret, c; 949 950 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