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