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 <time.h> 51 #include <unistd.h> 52 #include <ucl.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("failed to extract pkg-static: %s", 130 archive_error_string(a)); 131 132 cleanup: 133 archive_read_free(a); 134 return (ret); 135 136 } 137 138 static int 139 install_pkg_static(const char *path, const char *pkgpath, bool force) 140 { 141 int pstat; 142 pid_t pid; 143 144 switch ((pid = fork())) { 145 case -1: 146 return (-1); 147 case 0: 148 if (force) 149 execl(path, "pkg-static", "add", "-f", pkgpath, 150 (char *)NULL); 151 else 152 execl(path, "pkg-static", "add", pkgpath, 153 (char *)NULL); 154 _exit(1); 155 default: 156 break; 157 } 158 159 while (waitpid(pid, &pstat, 0) == -1) 160 if (errno != EINTR) 161 return (-1); 162 163 if (WEXITSTATUS(pstat)) 164 return (WEXITSTATUS(pstat)); 165 else if (WIFSIGNALED(pstat)) 166 return (128 & (WTERMSIG(pstat))); 167 return (pstat); 168 } 169 170 static int 171 fetch_to_fd(const char *url, char *path) 172 { 173 struct url *u; 174 struct dns_srvinfo *mirrors, *current; 175 struct url_stat st; 176 FILE *remote; 177 /* To store _https._tcp. + hostname + \0 */ 178 int fd; 179 int retry, max_retry; 180 off_t done, r; 181 time_t now, last; 182 char buf[10240]; 183 char zone[MAXHOSTNAMELEN + 13]; 184 static const char *mirror_type = NULL; 185 186 done = 0; 187 last = 0; 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 (done < st.size) { 242 if ((r = fread(buf, 1, sizeof(buf), remote)) < 1) 243 break; 244 245 if (write(fd, buf, r) != r) { 246 warn("write()"); 247 goto fetchfail; 248 } 249 250 done += r; 251 now = time(NULL); 252 if (now > last || done == st.size) 253 last = now; 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_buf(const unsigned char *cert, int certlen) 481 { 482 EVP_PKEY *pkey; 483 BIO *bp; 484 char errbuf[1024]; 485 486 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen); 487 488 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 489 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 490 491 BIO_free(bp); 492 493 return (pkey); 494 } 495 496 static bool 497 rsa_verify_cert(int fd, const unsigned char *key, int keylen, 498 unsigned char *sig, int siglen) 499 { 500 EVP_MD_CTX *mdctx; 501 EVP_PKEY *pkey; 502 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2]; 503 char errbuf[1024]; 504 bool ret; 505 506 pkey = NULL; 507 mdctx = NULL; 508 ret = false; 509 510 /* Compute SHA256 of the package. */ 511 if (lseek(fd, 0, 0) == -1) { 512 warn("lseek"); 513 goto cleanup; 514 } 515 if ((sha256_fd(fd, sha256)) == -1) { 516 warnx("Error creating SHA256 hash for package"); 517 goto cleanup; 518 } 519 520 if ((pkey = load_public_key_buf(key, keylen)) == NULL) { 521 warnx("Error reading public key"); 522 goto cleanup; 523 } 524 525 /* Verify signature of the SHA256(pkg) is valid. */ 526 if ((mdctx = EVP_MD_CTX_create()) == NULL) { 527 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 528 goto error; 529 } 530 531 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) { 532 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 533 goto error; 534 } 535 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) { 536 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 537 goto error; 538 } 539 540 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) { 541 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 542 goto error; 543 } 544 545 ret = true; 546 printf("done\n"); 547 goto cleanup; 548 549 error: 550 printf("failed\n"); 551 552 cleanup: 553 if (pkey) 554 EVP_PKEY_free(pkey); 555 if (mdctx) 556 EVP_MD_CTX_destroy(mdctx); 557 ERR_free_strings(); 558 559 return (ret); 560 } 561 562 static struct sig_cert * 563 parse_cert(int fd) { 564 int my_fd; 565 struct sig_cert *sc; 566 FILE *fp; 567 struct sbuf *buf, *sig, *cert; 568 char *line; 569 size_t linecap; 570 ssize_t linelen; 571 572 buf = NULL; 573 my_fd = -1; 574 sc = NULL; 575 line = NULL; 576 linecap = 0; 577 578 if (lseek(fd, 0, 0) == -1) { 579 warn("lseek"); 580 return (NULL); 581 } 582 583 /* Duplicate the fd so that fclose(3) does not close it. */ 584 if ((my_fd = dup(fd)) == -1) { 585 warnx("dup"); 586 return (NULL); 587 } 588 589 if ((fp = fdopen(my_fd, "rb")) == NULL) { 590 warn("fdopen"); 591 close(my_fd); 592 return (NULL); 593 } 594 595 sig = sbuf_new_auto(); 596 cert = sbuf_new_auto(); 597 598 while ((linelen = getline(&line, &linecap, fp)) > 0) { 599 if (strcmp(line, "SIGNATURE\n") == 0) { 600 buf = sig; 601 continue; 602 } else if (strcmp(line, "CERT\n") == 0) { 603 buf = cert; 604 continue; 605 } else if (strcmp(line, "END\n") == 0) { 606 break; 607 } 608 if (buf != NULL) 609 sbuf_bcat(buf, line, linelen); 610 } 611 612 fclose(fp); 613 614 /* Trim out unrelated trailing newline */ 615 sbuf_setpos(sig, sbuf_len(sig) - 1); 616 617 sbuf_finish(sig); 618 sbuf_finish(cert); 619 620 sc = calloc(1, sizeof(struct sig_cert)); 621 sc->siglen = sbuf_len(sig); 622 sc->sig = calloc(1, sc->siglen); 623 memcpy(sc->sig, sbuf_data(sig), sc->siglen); 624 625 sc->certlen = sbuf_len(cert); 626 sc->cert = strdup(sbuf_data(cert)); 627 628 sbuf_delete(sig); 629 sbuf_delete(cert); 630 631 return (sc); 632 } 633 634 static bool 635 verify_signature(int fd_pkg, int fd_sig) 636 { 637 struct fingerprint_list *trusted, *revoked; 638 struct fingerprint *fingerprint; 639 struct sig_cert *sc; 640 bool ret; 641 int trusted_count, revoked_count; 642 const char *fingerprints; 643 char path[MAXPATHLEN]; 644 char hash[SHA256_DIGEST_LENGTH * 2 + 1]; 645 646 sc = NULL; 647 trusted = revoked = NULL; 648 ret = false; 649 650 /* Read and parse fingerprints. */ 651 if (config_string(FINGERPRINTS, &fingerprints) != 0) { 652 warnx("No CONFIG_FINGERPRINTS defined"); 653 goto cleanup; 654 } 655 656 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints); 657 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) { 658 warnx("Error loading trusted certificates"); 659 goto cleanup; 660 } 661 662 if (trusted_count == 0 || trusted == NULL) { 663 fprintf(stderr, "No trusted certificates found.\n"); 664 goto cleanup; 665 } 666 667 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints); 668 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) { 669 warnx("Error loading revoked certificates"); 670 goto cleanup; 671 } 672 673 /* Read certificate and signature in. */ 674 if ((sc = parse_cert(fd_sig)) == NULL) { 675 warnx("Error parsing certificate"); 676 goto cleanup; 677 } 678 /* Explicitly mark as non-trusted until proven otherwise. */ 679 sc->trusted = false; 680 681 /* Parse signature and pubkey out of the certificate */ 682 sha256_buf(sc->cert, sc->certlen, hash); 683 684 /* Check if this hash is revoked */ 685 if (revoked != NULL) { 686 STAILQ_FOREACH(fingerprint, revoked, next) { 687 if (strcasecmp(fingerprint->hash, hash) == 0) { 688 fprintf(stderr, "The package was signed with " 689 "revoked certificate %s\n", 690 fingerprint->name); 691 goto cleanup; 692 } 693 } 694 } 695 696 STAILQ_FOREACH(fingerprint, trusted, next) { 697 if (strcasecmp(fingerprint->hash, hash) == 0) { 698 sc->trusted = true; 699 sc->name = strdup(fingerprint->name); 700 break; 701 } 702 } 703 704 if (sc->trusted == false) { 705 fprintf(stderr, "No trusted fingerprint found matching " 706 "package's certificate\n"); 707 goto cleanup; 708 } 709 710 /* Verify the signature. */ 711 printf("Verifying signature with trusted certificate %s... ", sc->name); 712 if (rsa_verify_cert(fd_pkg, sc->cert, sc->certlen, sc->sig, 713 sc->siglen) == false) { 714 fprintf(stderr, "Signature is not valid\n"); 715 goto cleanup; 716 } 717 718 ret = true; 719 720 cleanup: 721 if (trusted) 722 free_fingerprint_list(trusted); 723 if (revoked) 724 free_fingerprint_list(revoked); 725 if (sc) { 726 free(sc->cert); 727 free(sc->sig); 728 free(sc->name); 729 free(sc); 730 } 731 732 return (ret); 733 } 734 735 static int 736 bootstrap_pkg(bool force) 737 { 738 int fd_pkg, fd_sig; 739 int ret; 740 char url[MAXPATHLEN]; 741 char tmppkg[MAXPATHLEN]; 742 char tmpsig[MAXPATHLEN]; 743 const char *packagesite; 744 const char *signature_type; 745 char pkgstatic[MAXPATHLEN]; 746 747 fd_sig = -1; 748 ret = -1; 749 750 if (config_string(PACKAGESITE, &packagesite) != 0) { 751 warnx("No PACKAGESITE defined"); 752 return (-1); 753 } 754 755 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 756 warnx("Error looking up SIGNATURE_TYPE"); 757 return (-1); 758 } 759 760 printf("Bootstrapping pkg from %s, please wait...\n", packagesite); 761 762 /* Support pkg+http:// for PACKAGESITE which is the new format 763 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has 764 no A record. */ 765 if (strncmp(URL_SCHEME_PREFIX, packagesite, 766 strlen(URL_SCHEME_PREFIX)) == 0) 767 packagesite += strlen(URL_SCHEME_PREFIX); 768 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite); 769 770 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 771 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 772 773 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1) 774 goto fetchfail; 775 776 if (signature_type != NULL && 777 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 778 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX", 779 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 780 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig", 781 packagesite); 782 783 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 784 fprintf(stderr, "Signature for pkg not available.\n"); 785 goto fetchfail; 786 } 787 788 if (verify_signature(fd_pkg, fd_sig) == false) 789 goto cleanup; 790 } 791 792 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 793 ret = install_pkg_static(pkgstatic, tmppkg, force); 794 795 goto cleanup; 796 797 fetchfail: 798 warnx("Error fetching %s: %s", url, fetchLastErrString); 799 fprintf(stderr, "A pre-built version of pkg could not be found for " 800 "your system.\n"); 801 fprintf(stderr, "Consider changing PACKAGESITE or installing it from " 802 "ports: 'ports-mgmt/pkg'.\n"); 803 804 cleanup: 805 if (fd_sig != -1) { 806 close(fd_sig); 807 unlink(tmpsig); 808 } 809 810 if (fd_pkg != -1) { 811 close(fd_pkg); 812 unlink(tmppkg); 813 } 814 815 return (ret); 816 } 817 818 static const char confirmation_message[] = 819 "The package management tool is not yet installed on your system.\n" 820 "Do you want to fetch and install it now? [y/N]: "; 821 822 static const char non_interactive_message[] = 823 "The package management tool is not yet installed on your system.\n" 824 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap " 825 "in non-interactive (stdin not being a tty)\n"; 826 827 static int 828 pkg_query_yes_no(void) 829 { 830 int ret, c; 831 832 c = getchar(); 833 834 if (c == 'y' || c == 'Y') 835 ret = 1; 836 else 837 ret = 0; 838 839 while (c != '\n' && c != EOF) 840 c = getchar(); 841 842 return (ret); 843 } 844 845 static int 846 bootstrap_pkg_local(const char *pkgpath, bool force) 847 { 848 char path[MAXPATHLEN]; 849 char pkgstatic[MAXPATHLEN]; 850 const char *signature_type; 851 int fd_pkg, fd_sig, ret; 852 853 fd_sig = -1; 854 ret = -1; 855 856 fd_pkg = open(pkgpath, O_RDONLY); 857 if (fd_pkg == -1) 858 err(EXIT_FAILURE, "Unable to open %s", pkgpath); 859 860 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 861 warnx("Error looking up SIGNATURE_TYPE"); 862 goto cleanup; 863 } 864 if (signature_type != NULL && 865 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 866 snprintf(path, sizeof(path), "%s.sig", pkgpath); 867 868 if ((fd_sig = open(path, O_RDONLY)) == -1) { 869 fprintf(stderr, "Signature for pkg not available.\n"); 870 goto cleanup; 871 } 872 873 if (verify_signature(fd_pkg, fd_sig) == false) 874 goto cleanup; 875 } 876 877 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 878 ret = install_pkg_static(pkgstatic, pkgpath, force); 879 880 cleanup: 881 close(fd_pkg); 882 if (fd_sig != -1) 883 close(fd_sig); 884 885 return (ret); 886 } 887 888 int 889 main(int argc, char *argv[]) 890 { 891 char pkgpath[MAXPATHLEN]; 892 const char *pkgarg; 893 bool bootstrap_only, force, yes; 894 895 bootstrap_only = false; 896 force = false; 897 pkgarg = NULL; 898 yes = false; 899 900 snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", 901 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); 902 903 if (argc > 1 && strcmp(argv[1], "bootstrap") == 0) { 904 bootstrap_only = true; 905 if (argc == 3 && strcmp(argv[2], "-f") == 0) 906 force = true; 907 } 908 909 if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) { 910 /* 911 * To allow 'pkg -N' to be used as a reliable test for whether 912 * a system is configured to use pkg, don't bootstrap pkg 913 * when that argument is given as argv[1]. 914 */ 915 if (argv[1] != NULL && strcmp(argv[1], "-N") == 0) 916 errx(EXIT_FAILURE, "pkg is not installed"); 917 918 config_init(); 919 920 if (argc > 1 && strcmp(argv[1], "add") == 0) { 921 if (argc > 2 && strcmp(argv[2], "-f") == 0) { 922 force = true; 923 pkgarg = argv[3]; 924 } else 925 pkgarg = argv[2]; 926 if (pkgarg == NULL) { 927 fprintf(stderr, "Path to pkg.txz required\n"); 928 exit(EXIT_FAILURE); 929 } 930 if (access(pkgarg, R_OK) == -1) { 931 fprintf(stderr, "No such file: %s\n", pkgarg); 932 exit(EXIT_FAILURE); 933 } 934 if (bootstrap_pkg_local(pkgarg, force) != 0) 935 exit(EXIT_FAILURE); 936 exit(EXIT_SUCCESS); 937 } 938 /* 939 * Do not ask for confirmation if either of stdin or stdout is 940 * not tty. Check the environment to see if user has answer 941 * tucked in there already. 942 */ 943 config_bool(ASSUME_ALWAYS_YES, &yes); 944 if (!yes) { 945 if (!isatty(fileno(stdin))) { 946 fprintf(stderr, non_interactive_message); 947 exit(EXIT_FAILURE); 948 } 949 950 printf("%s", confirmation_message); 951 if (pkg_query_yes_no() == 0) 952 exit(EXIT_FAILURE); 953 } 954 if (bootstrap_pkg(force) != 0) 955 exit(EXIT_FAILURE); 956 config_finish(); 957 958 if (bootstrap_only) 959 exit(EXIT_SUCCESS); 960 } else if (bootstrap_only) { 961 printf("pkg already bootstrapped at %s\n", pkgpath); 962 exit(EXIT_SUCCESS); 963 } 964 965 execv(pkgpath, argv); 966 967 /* NOT REACHED */ 968 return (EXIT_FAILURE); 969 } 970