1 /*- 2 * Copyright (c) 2012-2013 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 <time.h> 51 #include <unistd.h> 52 #include <yaml.h> 53 54 #include <openssl/err.h> 55 #include <openssl/ssl.h> 56 57 #include "dns_utils.h" 58 #include "config.h" 59 60 struct sig_cert { 61 char *name; 62 unsigned char *sig; 63 int siglen; 64 unsigned char *cert; 65 int certlen; 66 bool trusted; 67 }; 68 69 typedef enum { 70 HASH_UNKNOWN, 71 HASH_SHA256, 72 } hash_t; 73 74 struct fingerprint { 75 hash_t type; 76 char *name; 77 char hash[BUFSIZ]; 78 STAILQ_ENTRY(fingerprint) next; 79 }; 80 81 STAILQ_HEAD(fingerprint_list, fingerprint); 82 83 static int 84 extract_pkg_static(int fd, char *p, int sz) 85 { 86 struct archive *a; 87 struct archive_entry *ae; 88 char *end; 89 int ret, r; 90 91 ret = -1; 92 a = archive_read_new(); 93 if (a == NULL) { 94 warn("archive_read_new"); 95 return (ret); 96 } 97 archive_read_support_filter_all(a); 98 archive_read_support_format_tar(a); 99 100 if (lseek(fd, 0, 0) == -1) { 101 warn("lseek"); 102 goto cleanup; 103 } 104 105 if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { 106 warnx("archive_read_open_fd: %s", archive_error_string(a)); 107 goto cleanup; 108 } 109 110 ae = NULL; 111 while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { 112 end = strrchr(archive_entry_pathname(ae), '/'); 113 if (end == NULL) 114 continue; 115 116 if (strcmp(end, "/pkg-static") == 0) { 117 r = archive_read_extract(a, ae, 118 ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | 119 ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | 120 ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); 121 strlcpy(p, archive_entry_pathname(ae), sz); 122 break; 123 } 124 } 125 126 if (r == ARCHIVE_OK) 127 ret = 0; 128 else 129 warnx("fail to extract pkg-static"); 130 131 cleanup: 132 archive_read_free(a); 133 return (ret); 134 135 } 136 137 static int 138 install_pkg_static(const char *path, const char *pkgpath, bool force) 139 { 140 int pstat; 141 pid_t pid; 142 143 switch ((pid = fork())) { 144 case -1: 145 return (-1); 146 case 0: 147 if (force) 148 execl(path, "pkg-static", "add", "-f", pkgpath, 149 (char *)NULL); 150 else 151 execl(path, "pkg-static", "add", pkgpath, 152 (char *)NULL); 153 _exit(1); 154 default: 155 break; 156 } 157 158 while (waitpid(pid, &pstat, 0) == -1) 159 if (errno != EINTR) 160 return (-1); 161 162 if (WEXITSTATUS(pstat)) 163 return (WEXITSTATUS(pstat)); 164 else if (WIFSIGNALED(pstat)) 165 return (128 & (WTERMSIG(pstat))); 166 return (pstat); 167 } 168 169 static int 170 fetch_to_fd(const char *url, char *path) 171 { 172 struct url *u; 173 struct dns_srvinfo *mirrors, *current; 174 struct url_stat st; 175 FILE *remote; 176 /* To store _https._tcp. + hostname + \0 */ 177 int fd; 178 int retry, max_retry; 179 off_t done, r; 180 time_t now, last; 181 char buf[10240]; 182 char zone[MAXHOSTNAMELEN + 13]; 183 static const char *mirror_type = NULL; 184 185 done = 0; 186 last = 0; 187 max_retry = 3; 188 current = mirrors = NULL; 189 remote = NULL; 190 191 if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type) 192 != 0) { 193 warnx("No MIRROR_TYPE defined"); 194 return (-1); 195 } 196 197 if ((fd = mkstemp(path)) == -1) { 198 warn("mkstemp()"); 199 return (-1); 200 } 201 202 retry = max_retry; 203 204 u = fetchParseURL(url); 205 while (remote == NULL) { 206 if (retry == max_retry) { 207 if (strcmp(u->scheme, "file") != 0 && 208 strcasecmp(mirror_type, "srv") == 0) { 209 snprintf(zone, sizeof(zone), 210 "_%s._tcp.%s", u->scheme, u->host); 211 mirrors = dns_getsrvinfo(zone); 212 current = mirrors; 213 } 214 } 215 216 if (mirrors != NULL) { 217 strlcpy(u->host, current->host, sizeof(u->host)); 218 u->port = current->port; 219 } 220 221 remote = fetchXGet(u, &st, ""); 222 if (remote == NULL) { 223 --retry; 224 if (retry <= 0) 225 goto fetchfail; 226 if (mirrors == NULL) { 227 sleep(1); 228 } else { 229 current = current->next; 230 if (current == NULL) 231 current = mirrors; 232 } 233 } 234 } 235 236 while (done < st.size) { 237 if ((r = fread(buf, 1, sizeof(buf), remote)) < 1) 238 break; 239 240 if (write(fd, buf, r) != r) { 241 warn("write()"); 242 goto fetchfail; 243 } 244 245 done += r; 246 now = time(NULL); 247 if (now > last || done == st.size) 248 last = now; 249 } 250 251 if (ferror(remote)) 252 goto fetchfail; 253 254 goto cleanup; 255 256 fetchfail: 257 if (fd != -1) { 258 close(fd); 259 fd = -1; 260 unlink(path); 261 } 262 263 cleanup: 264 if (remote != NULL) 265 fclose(remote); 266 267 return fd; 268 } 269 270 static struct fingerprint * 271 parse_fingerprint(yaml_document_t *doc, yaml_node_t *node) 272 { 273 yaml_node_pair_t *pair; 274 yaml_char_t *function, *fp; 275 struct fingerprint *f; 276 hash_t fct = HASH_UNKNOWN; 277 278 function = fp = NULL; 279 280 pair = node->data.mapping.pairs.start; 281 while (pair < node->data.mapping.pairs.top) { 282 yaml_node_t *key = yaml_document_get_node(doc, pair->key); 283 yaml_node_t *val = yaml_document_get_node(doc, pair->value); 284 285 if (key->data.scalar.length <= 0) { 286 ++pair; 287 continue; 288 } 289 290 if (val->type != YAML_SCALAR_NODE) { 291 ++pair; 292 continue; 293 } 294 295 if (strcasecmp(key->data.scalar.value, "function") == 0) 296 function = val->data.scalar.value; 297 else if (strcasecmp(key->data.scalar.value, "fingerprint") 298 == 0) 299 fp = val->data.scalar.value; 300 301 ++pair; 302 continue; 303 } 304 305 if (fp == NULL || function == NULL) 306 return (NULL); 307 308 if (strcasecmp(function, "sha256") == 0) 309 fct = HASH_SHA256; 310 311 if (fct == HASH_UNKNOWN) { 312 fprintf(stderr, "Unsupported hashing function: %s\n", function); 313 return (NULL); 314 } 315 316 f = calloc(1, sizeof(struct fingerprint)); 317 f->type = fct; 318 strlcpy(f->hash, fp, sizeof(f->hash)); 319 320 return (f); 321 } 322 323 static void 324 free_fingerprint_list(struct fingerprint_list* list) 325 { 326 struct fingerprint *fingerprint, *tmp; 327 328 STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) { 329 free(fingerprint->name); 330 free(fingerprint); 331 } 332 free(list); 333 } 334 335 static struct fingerprint * 336 load_fingerprint(const char *dir, const char *filename) 337 { 338 yaml_parser_t parser; 339 yaml_document_t doc; 340 yaml_node_t *node; 341 FILE *fp; 342 struct fingerprint *f; 343 char path[MAXPATHLEN]; 344 345 f = NULL; 346 347 snprintf(path, MAXPATHLEN, "%s/%s", dir, filename); 348 349 if ((fp = fopen(path, "r")) == NULL) 350 return (NULL); 351 352 yaml_parser_initialize(&parser); 353 yaml_parser_set_input_file(&parser, fp); 354 yaml_parser_load(&parser, &doc); 355 356 node = yaml_document_get_root_node(&doc); 357 if (node == NULL || node->type != YAML_MAPPING_NODE) 358 goto out; 359 360 f = parse_fingerprint(&doc, node); 361 f->name = strdup(filename); 362 363 out: 364 yaml_document_delete(&doc); 365 yaml_parser_delete(&parser); 366 fclose(fp); 367 368 return (f); 369 } 370 371 static struct fingerprint_list * 372 load_fingerprints(const char *path, int *count) 373 { 374 DIR *d; 375 struct dirent *ent; 376 struct fingerprint *finger; 377 struct fingerprint_list *fingerprints; 378 379 *count = 0; 380 381 fingerprints = calloc(1, sizeof(struct fingerprint_list)); 382 if (fingerprints == NULL) 383 return (NULL); 384 STAILQ_INIT(fingerprints); 385 386 if ((d = opendir(path)) == NULL) 387 return (NULL); 388 389 while ((ent = readdir(d))) { 390 if (strcmp(ent->d_name, ".") == 0 || 391 strcmp(ent->d_name, "..") == 0) 392 continue; 393 finger = load_fingerprint(path, ent->d_name); 394 if (finger != NULL) { 395 STAILQ_INSERT_TAIL(fingerprints, finger, next); 396 ++(*count); 397 } 398 } 399 400 closedir(d); 401 402 return (fingerprints); 403 } 404 405 static void 406 sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH], 407 char out[SHA256_DIGEST_LENGTH * 2 + 1]) 408 { 409 int i; 410 411 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) 412 sprintf(out + (i * 2), "%02x", hash[i]); 413 414 out[SHA256_DIGEST_LENGTH * 2] = '\0'; 415 } 416 417 static void 418 sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 419 { 420 unsigned char hash[SHA256_DIGEST_LENGTH]; 421 SHA256_CTX sha256; 422 423 out[0] = '\0'; 424 425 SHA256_Init(&sha256); 426 SHA256_Update(&sha256, buf, len); 427 SHA256_Final(hash, &sha256); 428 sha256_hash(hash, out); 429 } 430 431 static int 432 sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 433 { 434 int my_fd; 435 FILE *fp; 436 char buffer[BUFSIZ]; 437 unsigned char hash[SHA256_DIGEST_LENGTH]; 438 size_t r; 439 int ret; 440 SHA256_CTX sha256; 441 442 my_fd = -1; 443 fp = NULL; 444 r = 0; 445 ret = 1; 446 447 out[0] = '\0'; 448 449 /* Duplicate the fd so that fclose(3) does not close it. */ 450 if ((my_fd = dup(fd)) == -1) { 451 warnx("dup"); 452 goto cleanup; 453 } 454 455 if ((fp = fdopen(my_fd, "rb")) == NULL) { 456 warnx("fdopen"); 457 goto cleanup; 458 } 459 460 SHA256_Init(&sha256); 461 462 while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0) 463 SHA256_Update(&sha256, buffer, r); 464 465 if (ferror(fp) != 0) { 466 warnx("fread"); 467 goto cleanup; 468 } 469 470 SHA256_Final(hash, &sha256); 471 sha256_hash(hash, out); 472 ret = 0; 473 474 cleanup: 475 if (fp != NULL) 476 fclose(fp); 477 else if (my_fd != -1) 478 close(my_fd); 479 (void)lseek(fd, 0, SEEK_SET); 480 481 return (ret); 482 } 483 484 static EVP_PKEY * 485 load_public_key_buf(const unsigned char *cert, int certlen) 486 { 487 EVP_PKEY *pkey; 488 BIO *bp; 489 char errbuf[1024]; 490 491 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen); 492 493 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 494 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 495 496 BIO_free(bp); 497 498 return (pkey); 499 } 500 501 static bool 502 rsa_verify_cert(int fd, const unsigned char *key, int keylen, 503 unsigned char *sig, int siglen) 504 { 505 EVP_MD_CTX *mdctx; 506 EVP_PKEY *pkey; 507 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2]; 508 char errbuf[1024]; 509 bool ret; 510 511 pkey = NULL; 512 mdctx = NULL; 513 ret = false; 514 515 /* Compute SHA256 of the package. */ 516 if (lseek(fd, 0, 0) == -1) { 517 warn("lseek"); 518 goto cleanup; 519 } 520 if ((sha256_fd(fd, sha256)) == -1) { 521 warnx("Error creating SHA256 hash for package"); 522 goto cleanup; 523 } 524 525 if ((pkey = load_public_key_buf(key, keylen)) == NULL) { 526 warnx("Error reading public key"); 527 goto cleanup; 528 } 529 530 /* Verify signature of the SHA256(pkg) is valid. */ 531 if ((mdctx = EVP_MD_CTX_create()) == NULL) { 532 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 533 goto error; 534 } 535 536 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) { 537 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 538 goto error; 539 } 540 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) { 541 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 542 goto error; 543 } 544 545 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) { 546 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 547 goto error; 548 } 549 550 ret = true; 551 printf("done\n"); 552 goto cleanup; 553 554 error: 555 printf("failed\n"); 556 557 cleanup: 558 if (pkey) 559 EVP_PKEY_free(pkey); 560 if (mdctx) 561 EVP_MD_CTX_destroy(mdctx); 562 ERR_free_strings(); 563 564 return (ret); 565 } 566 567 static struct sig_cert * 568 parse_cert(int fd) { 569 int my_fd; 570 struct sig_cert *sc; 571 FILE *fp; 572 struct sbuf *buf, *sig, *cert; 573 char *line; 574 size_t linecap; 575 ssize_t linelen; 576 577 buf = NULL; 578 my_fd = -1; 579 sc = NULL; 580 line = NULL; 581 linecap = 0; 582 583 if (lseek(fd, 0, 0) == -1) { 584 warn("lseek"); 585 return (NULL); 586 } 587 588 /* Duplicate the fd so that fclose(3) does not close it. */ 589 if ((my_fd = dup(fd)) == -1) { 590 warnx("dup"); 591 return (NULL); 592 } 593 594 if ((fp = fdopen(my_fd, "rb")) == NULL) { 595 warn("fdopen"); 596 close(my_fd); 597 return (NULL); 598 } 599 600 sig = sbuf_new_auto(); 601 cert = sbuf_new_auto(); 602 603 while ((linelen = getline(&line, &linecap, fp)) > 0) { 604 if (strcmp(line, "SIGNATURE\n") == 0) { 605 buf = sig; 606 continue; 607 } else if (strcmp(line, "CERT\n") == 0) { 608 buf = cert; 609 continue; 610 } else if (strcmp(line, "END\n") == 0) { 611 break; 612 } 613 if (buf != NULL) 614 sbuf_bcat(buf, line, linelen); 615 } 616 617 fclose(fp); 618 619 /* Trim out unrelated trailing newline */ 620 sbuf_setpos(sig, sbuf_len(sig) - 1); 621 622 sbuf_finish(sig); 623 sbuf_finish(cert); 624 625 sc = calloc(1, sizeof(struct sig_cert)); 626 sc->siglen = sbuf_len(sig); 627 sc->sig = calloc(1, sc->siglen); 628 memcpy(sc->sig, sbuf_data(sig), sc->siglen); 629 630 sc->certlen = sbuf_len(cert); 631 sc->cert = strdup(sbuf_data(cert)); 632 633 sbuf_delete(sig); 634 sbuf_delete(cert); 635 636 return (sc); 637 } 638 639 static bool 640 verify_signature(int fd_pkg, int fd_sig) 641 { 642 struct fingerprint_list *trusted, *revoked; 643 struct fingerprint *fingerprint; 644 struct sig_cert *sc; 645 bool ret; 646 int trusted_count, revoked_count; 647 const char *fingerprints; 648 char path[MAXPATHLEN]; 649 char hash[SHA256_DIGEST_LENGTH * 2 + 1]; 650 651 sc = NULL; 652 trusted = revoked = NULL; 653 ret = false; 654 655 /* Read and parse fingerprints. */ 656 if (config_string(FINGERPRINTS, &fingerprints) != 0) { 657 warnx("No CONFIG_FINGERPRINTS defined"); 658 goto cleanup; 659 } 660 661 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints); 662 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) { 663 warnx("Error loading trusted certificates"); 664 goto cleanup; 665 } 666 667 if (trusted_count == 0 || trusted == NULL) { 668 fprintf(stderr, "No trusted certificates found.\n"); 669 goto cleanup; 670 } 671 672 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints); 673 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) { 674 warnx("Error loading revoked certificates"); 675 goto cleanup; 676 } 677 678 /* Read certificate and signature in. */ 679 if ((sc = parse_cert(fd_sig)) == NULL) { 680 warnx("Error parsing certificate"); 681 goto cleanup; 682 } 683 /* Explicitly mark as non-trusted until proven otherwise. */ 684 sc->trusted = false; 685 686 /* Parse signature and pubkey out of the certificate */ 687 sha256_buf(sc->cert, sc->certlen, hash); 688 689 /* Check if this hash is revoked */ 690 if (revoked != NULL) { 691 STAILQ_FOREACH(fingerprint, revoked, next) { 692 if (strcasecmp(fingerprint->hash, hash) == 0) { 693 fprintf(stderr, "The package was signed with " 694 "revoked certificate %s\n", 695 fingerprint->name); 696 goto cleanup; 697 } 698 } 699 } 700 701 STAILQ_FOREACH(fingerprint, trusted, next) { 702 if (strcasecmp(fingerprint->hash, hash) == 0) { 703 sc->trusted = true; 704 sc->name = strdup(fingerprint->name); 705 break; 706 } 707 } 708 709 if (sc->trusted == false) { 710 fprintf(stderr, "No trusted fingerprint found matching " 711 "package's certificate\n"); 712 goto cleanup; 713 } 714 715 /* Verify the signature. */ 716 printf("Verifying signature with trusted certificate %s... ", sc->name); 717 if (rsa_verify_cert(fd_pkg, sc->cert, sc->certlen, sc->sig, 718 sc->siglen) == false) { 719 fprintf(stderr, "Signature is not valid\n"); 720 goto cleanup; 721 } 722 723 ret = true; 724 725 cleanup: 726 if (trusted) 727 free_fingerprint_list(trusted); 728 if (revoked) 729 free_fingerprint_list(revoked); 730 if (sc) { 731 free(sc->cert); 732 free(sc->sig); 733 free(sc->name); 734 free(sc); 735 } 736 737 return (ret); 738 } 739 740 static int 741 bootstrap_pkg(bool force) 742 { 743 int fd_pkg, fd_sig; 744 int ret; 745 char url[MAXPATHLEN]; 746 char tmppkg[MAXPATHLEN]; 747 char tmpsig[MAXPATHLEN]; 748 const char *packagesite; 749 const char *signature_type; 750 char pkgstatic[MAXPATHLEN]; 751 752 fd_sig = -1; 753 ret = -1; 754 755 if (config_string(PACKAGESITE, &packagesite) != 0) { 756 warnx("No PACKAGESITE defined"); 757 return (-1); 758 } 759 760 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 761 warnx("Error looking up SIGNATURE_TYPE"); 762 return (-1); 763 } 764 765 printf("Bootstrapping pkg from %s, please wait...\n", packagesite); 766 767 /* Support pkg+http:// for PACKAGESITE which is the new format 768 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has 769 no A record. */ 770 if (strncmp(URL_SCHEME_PREFIX, packagesite, 771 strlen(URL_SCHEME_PREFIX)) == 0) 772 packagesite += strlen(URL_SCHEME_PREFIX); 773 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite); 774 775 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 776 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 777 778 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1) 779 goto fetchfail; 780 781 if (signature_type != NULL && 782 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 783 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX", 784 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 785 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig", 786 packagesite); 787 788 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 789 fprintf(stderr, "Signature for pkg not available.\n"); 790 goto fetchfail; 791 } 792 793 if (verify_signature(fd_pkg, fd_sig) == false) 794 goto cleanup; 795 } 796 797 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 798 ret = install_pkg_static(pkgstatic, tmppkg, force); 799 800 goto cleanup; 801 802 fetchfail: 803 warnx("Error fetching %s: %s", url, fetchLastErrString); 804 fprintf(stderr, "A pre-built version of pkg could not be found for " 805 "your system.\n"); 806 fprintf(stderr, "Consider changing PACKAGESITE or installing it from " 807 "ports: 'ports-mgmt/pkg'.\n"); 808 809 cleanup: 810 if (fd_sig != -1) { 811 close(fd_sig); 812 unlink(tmpsig); 813 } 814 close(fd_pkg); 815 unlink(tmppkg); 816 817 return (ret); 818 } 819 820 static const char confirmation_message[] = 821 "The package management tool is not yet installed on your system.\n" 822 "Do you want to fetch and install it now? [y/N]: "; 823 824 static const char non_interactive_message[] = 825 "The package management tool is not yet installed on your system.\n" 826 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap " 827 "in non-interactive (stdin not being a tty)\n"; 828 829 static int 830 pkg_query_yes_no(void) 831 { 832 int ret, c; 833 834 c = getchar(); 835 836 if (c == 'y' || c == 'Y') 837 ret = 1; 838 else 839 ret = 0; 840 841 while (c != '\n' && c != EOF) 842 c = getchar(); 843 844 return (ret); 845 } 846 847 static int 848 bootstrap_pkg_local(const char *pkgpath, bool force) 849 { 850 char path[MAXPATHLEN]; 851 char pkgstatic[MAXPATHLEN]; 852 const char *signature_type; 853 int fd_pkg, fd_sig, ret; 854 855 fd_sig = -1; 856 ret = -1; 857 858 fd_pkg = open(pkgpath, O_RDONLY); 859 if (fd_pkg == -1) 860 err(EXIT_FAILURE, "Unable to open %s", pkgpath); 861 862 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 863 warnx("Error looking up SIGNATURE_TYPE"); 864 return (-1); 865 } 866 if (signature_type != NULL && 867 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 868 snprintf(path, sizeof(path), "%s.sig", pkgpath); 869 870 if ((fd_sig = open(path, O_RDONLY)) == -1) { 871 fprintf(stderr, "Signature for pkg not available.\n"); 872 goto cleanup; 873 } 874 875 if (verify_signature(fd_pkg, fd_sig) == false) 876 goto cleanup; 877 } 878 879 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 880 ret = install_pkg_static(pkgstatic, pkgpath, force); 881 882 cleanup: 883 close(fd_pkg); 884 if (fd_sig != -1) 885 close(fd_sig); 886 887 return (ret); 888 } 889 890 int 891 main(int argc, char *argv[]) 892 { 893 char pkgpath[MAXPATHLEN]; 894 const char *pkgarg; 895 bool bootstrap_only, force, yes; 896 897 bootstrap_only = false; 898 force = false; 899 pkgarg = NULL; 900 yes = false; 901 902 snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", 903 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); 904 905 if (argc > 1 && strcmp(argv[1], "bootstrap") == 0) { 906 bootstrap_only = true; 907 if (argc == 3 && strcmp(argv[2], "-f") == 0) 908 force = true; 909 } 910 911 if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) { 912 /* 913 * To allow 'pkg -N' to be used as a reliable test for whether 914 * a system is configured to use pkg, don't bootstrap pkg 915 * when that argument is given as argv[1]. 916 */ 917 if (argv[1] != NULL && strcmp(argv[1], "-N") == 0) 918 errx(EXIT_FAILURE, "pkg is not installed"); 919 920 config_init(); 921 922 if (argc > 1 && strcmp(argv[1], "add") == 0) { 923 if (argc > 2 && strcmp(argv[2], "-f") == 0) { 924 force = true; 925 pkgarg = argv[3]; 926 } else 927 pkgarg = argv[2]; 928 if (pkgarg == NULL) { 929 fprintf(stderr, "Path to pkg.txz required\n"); 930 exit(EXIT_FAILURE); 931 } 932 if (access(pkgarg, R_OK) == -1) { 933 fprintf(stderr, "No such file: %s\n", pkgarg); 934 exit(EXIT_FAILURE); 935 } 936 if (bootstrap_pkg_local(pkgarg, force) != 0) 937 exit(EXIT_FAILURE); 938 exit(EXIT_SUCCESS); 939 } 940 /* 941 * Do not ask for confirmation if either of stdin or stdout is 942 * not tty. Check the environment to see if user has answer 943 * tucked in there already. 944 */ 945 config_bool(ASSUME_ALWAYS_YES, &yes); 946 if (!yes) { 947 if (!isatty(fileno(stdin))) { 948 fprintf(stderr, non_interactive_message); 949 exit(EXIT_FAILURE); 950 } 951 952 printf("%s", confirmation_message); 953 if (pkg_query_yes_no() == 0) 954 exit(EXIT_FAILURE); 955 } 956 if (bootstrap_pkg(force) != 0) 957 exit(EXIT_FAILURE); 958 config_finish(); 959 960 if (bootstrap_only) 961 exit(EXIT_SUCCESS); 962 } else if (bootstrap_only) { 963 printf("pkg already bootstrapped at %s\n", pkgpath); 964 exit(EXIT_SUCCESS); 965 } 966 967 execv(pkgpath, argv); 968 969 /* NOT REACHED */ 970 return (EXIT_FAILURE); 971 } 972