usr.sbin/pkg/pkg.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2012-2014 Baptiste Daroussin <bapt@FreeBSD.org>
   5  * Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 #include <sys/param.h>
  32 #include <sys/queue.h>
  33 #include <sys/types.h>
  34 #include <sys/wait.h>
  35
  36 #include <archive.h>
  37 #include <archive_entry.h>
  38 #include <dirent.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <fetch.h>
  43 #include <getopt.h>
  44 #include <libutil.h>
  45 #include <paths.h>
  46 #include <stdbool.h>
  47 #include <stdlib.h>
  48 #include <stdio.h>
  49 #include <string.h>
  50 #include <ucl.h>
  51
  52 #include <openssl/err.h>
  53 #include <openssl/ssl.h>
  54
  55 #include "dns_utils.h"
  56 #include "config.h"
  57 #include "hash.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 static const char *bootstrap_names []  = {
  86         "pkg.pkg",
  87         "pkg.txz",
  88         NULL
  89 };
  90
  91 STAILQ_HEAD(fingerprint_list, fingerprint);
  92
  93 static int debug;
  94
  95 static int
  96 extract_pkg_static(int fd, char *p, int sz)
  97 {
  98         struct archive *a;
  99         struct archive_entry *ae;
 100         char *end;
 101         int ret, r;
 102
 103         ret = -1;
 104         a = archive_read_new();
 105         if (a == NULL) {
 106                 warn("archive_read_new");
 107                 return (ret);
 108         }
 109         archive_read_support_filter_all(a);
 110         archive_read_support_format_tar(a);
 111
 112         if (lseek(fd, 0, 0) == -1) {
 113                 warn("lseek");
 114                 goto cleanup;
 115         }
 116
 117         if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) {
 118                 warnx("archive_read_open_fd: %s", archive_error_string(a));
 119                 goto cleanup;
 120         }
 121
 122         ae = NULL;
 123         while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) {
 124                 end = strrchr(archive_entry_pathname(ae), '/');
 125                 if (end == NULL)
 126                         continue;
 127
 128                 if (strcmp(end, "/pkg-static") == 0) {
 129                         r = archive_read_extract(a, ae,
 130                             ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM |
 131                             ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL |
 132                             ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR);
 133                         strlcpy(p, archive_entry_pathname(ae), sz);
 134                         break;
 135                 }
 136         }
 137
 138         if (r == ARCHIVE_OK)
 139                 ret = 0;
 140         else
 141                 warnx("failed to extract pkg-static: %s",
 142                     archive_error_string(a));
 143
 144 cleanup:
 145         archive_read_free(a);
 146         return (ret);
 147
 148 }
 149
 150 static int
 151 install_pkg_static(const char *path, const char *pkgpath, bool force)
 152 {
 153         int pstat;
 154         pid_t pid;
 155
 156         switch ((pid = fork())) {
 157         case -1:
 158                 return (-1);
 159         case 0:
 160                 if (force)
 161                         execl(path, "pkg-static", "add", "-f", pkgpath,
 162                             (char *)NULL);
 163                 else
 164                         execl(path, "pkg-static", "add", pkgpath,
 165                             (char *)NULL);
 166                 _exit(1);
 167         default:
 168                 break;
 169         }
 170
 171         while (waitpid(pid, &pstat, 0) == -1)
 172                 if (errno != EINTR)
 173                         return (-1);
 174
 175         if (WEXITSTATUS(pstat))
 176                 return (WEXITSTATUS(pstat));
 177         else if (WIFSIGNALED(pstat))
 178                 return (128 & (WTERMSIG(pstat)));
 179         return (pstat);
 180 }
 181
 182 static int
 183 fetch_to_fd(const char *url, char *path, const char *fetchOpts)
 184 {
 185         struct url *u;
 186         struct dns_srvinfo *mirrors, *current;
 187         struct url_stat st;
 188         FILE *remote;
 189         /* To store _https._tcp. + hostname + \0 */
 190         int fd;
 191         int retry, max_retry;
 192         ssize_t r;
 193         char buf[10240];
 194         char zone[MAXHOSTNAMELEN + 13];
 195         static const char *mirror_type = NULL;
 196
 197         max_retry = 3;
 198         current = mirrors = NULL;
 199         remote = NULL;
 200
 201         if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type)
 202             != 0) {
 203                 warnx("No MIRROR_TYPE defined");
 204                 return (-1);
 205         }
 206
 207         if ((fd = mkstemp(path)) == -1) {
 208                 warn("mkstemp()");
 209                 return (-1);
 210         }
 211
 212         retry = max_retry;
 213
 214         if ((u = fetchParseURL(url)) == NULL) {
 215                 warn("fetchParseURL('%s')", url);
 216                 return (-1);
 217         }
 218
 219         while (remote == NULL) {
 220                 if (retry == max_retry) {
 221                         if (strcmp(u->scheme, "file") != 0 &&
 222                             strcasecmp(mirror_type, "srv") == 0) {
 223                                 snprintf(zone, sizeof(zone),
 224                                     "_%s._tcp.%s", u->scheme, u->host);
 225                                 mirrors = dns_getsrvinfo(zone);
 226                                 current = mirrors;
 227                         }
 228                 }
 229
 230                 if (mirrors != NULL) {
 231                         strlcpy(u->host, current->host, sizeof(u->host));
 232                         u->port = current->port;
 233                 }
 234
 235                 remote = fetchXGet(u, &st, fetchOpts);
 236                 if (remote == NULL) {
 237                         --retry;
 238                         if (retry <= 0)
 239                                 goto fetchfail;
 240                         if (mirrors != NULL) {
 241                                 current = current->next;
 242                                 if (current == NULL)
 243                                         current = mirrors;
 244                         }
 245                 }
 246         }
 247
 248         while ((r = fread(buf, 1, sizeof(buf), remote)) > 0) {
 249                 if (write(fd, buf, r) != r) {
 250                         warn("write()");
 251                         goto fetchfail;
 252                 }
 253         }
 254
 255         if (r != 0) {
 256                 warn("An error occurred while fetching pkg(8)");
 257                 goto fetchfail;
 258         }
 259
 260         if (ferror(remote))
 261                 goto fetchfail;
 262
 263         goto cleanup;
 264
 265 fetchfail:
 266         if (fd != -1) {
 267                 close(fd);
 268                 fd = -1;
 269                 unlink(path);
 270         }
 271
 272 cleanup:
 273         if (remote != NULL)
 274                 fclose(remote);
 275
 276         return fd;
 277 }
 278
 279 static struct fingerprint *
 280 parse_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
 322 static void
 323 free_fingerprint_list(struct fingerprint_list* list)
 324 {
 325         struct fingerprint *fingerprint, *tmp;
 326
 327         STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) {
 328                 free(fingerprint->name);
 329                 free(fingerprint);
 330         }
 331         free(list);
 332 }
 333
 334 static struct fingerprint *
 335 load_fingerprint(const char *dir, const char *filename)
 336 {
 337         ucl_object_t *obj = NULL;
 338         struct ucl_parser *p = NULL;
 339         struct fingerprint *f;
 340         char path[MAXPATHLEN];
 341
 342         f = NULL;
 343
 344         snprintf(path, MAXPATHLEN, "%s/%s", dir, filename);
 345
 346         p = ucl_parser_new(0);
 347         if (!ucl_parser_add_file(p, path)) {
 348                 warnx("%s: %s", path, ucl_parser_get_error(p));
 349                 ucl_parser_free(p);
 350                 return (NULL);
 351         }
 352
 353         obj = ucl_parser_get_object(p);
 354
 355         if (obj->type == UCL_OBJECT)
 356                 f = parse_fingerprint(obj);
 357
 358         if (f != NULL)
 359                 f->name = strdup(filename);
 360
 361         ucl_object_unref(obj);
 362         ucl_parser_free(p);
 363
 364         return (f);
 365 }
 366
 367 static struct fingerprint_list *
 368 load_fingerprints(const char *path, int *count)
 369 {
 370         DIR *d;
 371         struct dirent *ent;
 372         struct fingerprint *finger;
 373         struct fingerprint_list *fingerprints;
 374
 375         *count = 0;
 376
 377         fingerprints = calloc(1, sizeof(struct fingerprint_list));
 378         if (fingerprints == NULL)
 379                 return (NULL);
 380         STAILQ_INIT(fingerprints);
 381
 382         if ((d = opendir(path)) == NULL) {
 383                 free(fingerprints);
 384
 385                 return (NULL);
 386         }
 387
 388         while ((ent = readdir(d))) {
 389                 if (strcmp(ent->d_name, ".") == 0 ||
 390                     strcmp(ent->d_name, "..") == 0)
 391                         continue;
 392                 finger = load_fingerprint(path, ent->d_name);
 393                 if (finger != NULL) {
 394                         STAILQ_INSERT_TAIL(fingerprints, finger, next);
 395                         ++(*count);
 396                 }
 397         }
 398
 399         closedir(d);
 400
 401         return (fingerprints);
 402 }
 403
 404 static EVP_PKEY *
 405 load_public_key_file(const char *file)
 406 {
 407         EVP_PKEY *pkey;
 408         BIO *bp;
 409         char errbuf[1024];
 410
 411         bp = BIO_new_file(file, "r");
 412         if (!bp)
 413                 errx(EXIT_FAILURE, "Unable to read %s", file);
 414
 415         if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
 416                 warnx("ici: %s", ERR_error_string(ERR_get_error(), errbuf));
 417
 418         BIO_free(bp);
 419
 420         return (pkey);
 421 }
 422
 423 static EVP_PKEY *
 424 load_public_key_buf(const unsigned char *cert, int certlen)
 425 {
 426         EVP_PKEY *pkey;
 427         BIO *bp;
 428         char errbuf[1024];
 429
 430         bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen);
 431
 432         if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
 433                 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
 434
 435         BIO_free(bp);
 436
 437         return (pkey);
 438 }
 439
 440 static bool
 441 rsa_verify_cert(int fd, const char *sigfile, const unsigned char *key,
 442     int keylen, unsigned char *sig, int siglen)
 443 {
 444         EVP_MD_CTX *mdctx;
 445         EVP_PKEY *pkey;
 446         char *sha256;
 447         char errbuf[1024];
 448         bool ret;
 449
 450         sha256 = NULL;
 451         pkey = NULL;
 452         mdctx = NULL;
 453         ret = false;
 454
 455         SSL_load_error_strings();
 456
 457         /* Compute SHA256 of the package. */
 458         if (lseek(fd, 0, 0) == -1) {
 459                 warn("lseek");
 460                 goto cleanup;
 461         }
 462         if ((sha256 = sha256_fd(fd)) == NULL) {
 463                 warnx("Error creating SHA256 hash for package");
 464                 goto cleanup;
 465         }
 466
 467         if (sigfile != NULL) {
 468                 if ((pkey = load_public_key_file(sigfile)) == NULL) {
 469                         warnx("Error reading public key");
 470                         goto cleanup;
 471                 }
 472         } else {
 473                 if ((pkey = load_public_key_buf(key, keylen)) == NULL) {
 474                         warnx("Error reading public key");
 475                         goto cleanup;
 476                 }
 477         }
 478
 479         /* Verify signature of the SHA256(pkg) is valid. */
 480         if ((mdctx = EVP_MD_CTX_create()) == NULL) {
 481                 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
 482                 goto error;
 483         }
 484
 485         if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) {
 486                 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
 487                 goto error;
 488         }
 489         if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) {
 490                 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
 491                 goto error;
 492         }
 493
 494         if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) {
 495                 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
 496                 goto error;
 497         }
 498
 499         ret = true;
 500         printf("done\n");
 501         goto cleanup;
 502
 503 error:
 504         printf("failed\n");
 505
 506 cleanup:
 507         free(sha256);
 508         if (pkey)
 509                 EVP_PKEY_free(pkey);
 510         if (mdctx)
 511                 EVP_MD_CTX_destroy(mdctx);
 512         ERR_free_strings();
 513
 514         return (ret);
 515 }
 516
 517 static struct pubkey *
 518 read_pubkey(int fd)
 519 {
 520         struct pubkey *pk;
 521         char *sigb;
 522         size_t sigsz;
 523         FILE *sig;
 524         char buf[4096];
 525         int r;
 526
 527         if (lseek(fd, 0, 0) == -1) {
 528                 warn("lseek");
 529                 return (NULL);
 530         }
 531
 532         sigsz = 0;
 533         sigb = NULL;
 534         sig = open_memstream(&sigb, &sigsz);
 535         if (sig == NULL)
 536                 err(EXIT_FAILURE, "open_memstream()");
 537
 538         while ((r = read(fd, buf, sizeof(buf))) >0) {
 539                 fwrite(buf, 1, r, sig);
 540         }
 541
 542         fclose(sig);
 543         pk = calloc(1, sizeof(struct pubkey));
 544         pk->siglen = sigsz;
 545         pk->sig = calloc(1, pk->siglen);
 546         memcpy(pk->sig, sigb, pk->siglen);
 547         free(sigb);
 548
 549         return (pk);
 550 }
 551
 552 static struct sig_cert *
 553 parse_cert(int fd) {
 554         int my_fd;
 555         struct sig_cert *sc;
 556         FILE *fp, *sigfp, *certfp, *tmpfp;
 557         char *line;
 558         char *sig, *cert;
 559         size_t linecap, sigsz, certsz;
 560         ssize_t linelen;
 561
 562         sc = NULL;
 563         line = NULL;
 564         linecap = 0;
 565         sig = cert = NULL;
 566         sigfp = certfp = tmpfp = NULL;
 567
 568         if (lseek(fd, 0, 0) == -1) {
 569                 warn("lseek");
 570                 return (NULL);
 571         }
 572
 573         /* Duplicate the fd so that fclose(3) does not close it. */
 574         if ((my_fd = dup(fd)) == -1) {
 575                 warnx("dup");
 576                 return (NULL);
 577         }
 578
 579         if ((fp = fdopen(my_fd, "rb")) == NULL) {
 580                 warn("fdopen");
 581                 close(my_fd);
 582                 return (NULL);
 583         }
 584
 585         sigsz = certsz = 0;
 586         sigfp = open_memstream(&sig, &sigsz);
 587         if (sigfp == NULL)
 588                 err(EXIT_FAILURE, "open_memstream()");
 589         certfp = open_memstream(&cert, &certsz);
 590         if (certfp == NULL)
 591                 err(EXIT_FAILURE, "open_memstream()");
 592
 593         while ((linelen = getline(&line, &linecap, fp)) > 0) {
 594                 if (strcmp(line, "SIGNATURE\n") == 0) {
 595                         tmpfp = sigfp;
 596                         continue;
 597                 } else if (strcmp(line, "CERT\n") == 0) {
 598                         tmpfp = certfp;
 599                         continue;
 600                 } else if (strcmp(line, "END\n") == 0) {
 601                         break;
 602                 }
 603                 if (tmpfp != NULL)
 604                         fwrite(line, 1, linelen, tmpfp);
 605         }
 606
 607         fclose(fp);
 608         fclose(sigfp);
 609         fclose(certfp);
 610
 611         sc = calloc(1, sizeof(struct sig_cert));
 612         sc->siglen = sigsz -1; /* Trim out unrelated trailing newline */
 613         sc->sig = sig;
 614
 615         sc->certlen = certsz;
 616         sc->cert = cert;
 617
 618         return (sc);
 619 }
 620
 621 static bool
 622 verify_pubsignature(int fd_pkg, int fd_sig)
 623 {
 624         struct pubkey *pk;
 625         const char *pubkey;
 626         bool ret;
 627
 628         pk = NULL;
 629         pubkey = NULL;
 630         ret = false;
 631         if (config_string(PUBKEY, &pubkey) != 0) {
 632                 warnx("No CONFIG_PUBKEY defined");
 633                 goto cleanup;
 634         }
 635
 636         if ((pk = read_pubkey(fd_sig)) == NULL) {
 637                 warnx("Error reading signature");
 638                 goto cleanup;
 639         }
 640
 641         /* Verify the signature. */
 642         printf("Verifying signature with public key %s... ", pubkey);
 643         if (rsa_verify_cert(fd_pkg, pubkey, NULL, 0, pk->sig,
 644             pk->siglen) == false) {
 645                 fprintf(stderr, "Signature is not valid\n");
 646                 goto cleanup;
 647         }
 648
 649         ret = true;
 650
 651 cleanup:
 652         if (pk) {
 653                 free(pk->sig);
 654                 free(pk);
 655         }
 656
 657         return (ret);
 658 }
 659
 660 static bool
 661 verify_signature(int fd_pkg, int fd_sig)
 662 {
 663         struct fingerprint_list *trusted, *revoked;
 664         struct fingerprint *fingerprint;
 665         struct sig_cert *sc;
 666         bool ret;
 667         int trusted_count, revoked_count;
 668         const char *fingerprints;
 669         char path[MAXPATHLEN];
 670         char *hash;
 671
 672         hash = NULL;
 673         sc = NULL;
 674         trusted = revoked = NULL;
 675         ret = false;
 676
 677         /* Read and parse fingerprints. */
 678         if (config_string(FINGERPRINTS, &fingerprints) != 0) {
 679                 warnx("No CONFIG_FINGERPRINTS defined");
 680                 goto cleanup;
 681         }
 682
 683         snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints);
 684         if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) {
 685                 warnx("Error loading trusted certificates");
 686                 goto cleanup;
 687         }
 688
 689         if (trusted_count == 0 || trusted == NULL) {
 690                 fprintf(stderr, "No trusted certificates found.\n");
 691                 goto cleanup;
 692         }
 693
 694         snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints);
 695         if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) {
 696                 warnx("Error loading revoked certificates");
 697                 goto cleanup;
 698         }
 699
 700         /* Read certificate and signature in. */
 701         if ((sc = parse_cert(fd_sig)) == NULL) {
 702                 warnx("Error parsing certificate");
 703                 goto cleanup;
 704         }
 705         /* Explicitly mark as non-trusted until proven otherwise. */
 706         sc->trusted = false;
 707
 708         /* Parse signature and pubkey out of the certificate */
 709         hash = sha256_buf(sc->cert, sc->certlen);
 710
 711         /* Check if this hash is revoked */
 712         if (revoked != NULL) {
 713                 STAILQ_FOREACH(fingerprint, revoked, next) {
 714                         if (strcasecmp(fingerprint->hash, hash) == 0) {
 715                                 fprintf(stderr, "The package was signed with "
 716                                     "revoked certificate %s\n",
 717                                     fingerprint->name);
 718                                 goto cleanup;
 719                         }
 720                 }
 721         }
 722
 723         STAILQ_FOREACH(fingerprint, trusted, next) {
 724                 if (strcasecmp(fingerprint->hash, hash) == 0) {
 725                         sc->trusted = true;
 726                         sc->name = strdup(fingerprint->name);
 727                         break;
 728                 }
 729         }
 730
 731         if (sc->trusted == false) {
 732                 fprintf(stderr, "No trusted fingerprint found matching "
 733                     "package's certificate\n");
 734                 goto cleanup;
 735         }
 736
 737         /* Verify the signature. */
 738         printf("Verifying signature with trusted certificate %s... ", sc->name);
 739         if (rsa_verify_cert(fd_pkg, NULL, sc->cert, sc->certlen, sc->sig,
 740             sc->siglen) == false) {
 741                 fprintf(stderr, "Signature is not valid\n");
 742                 goto cleanup;
 743         }
 744
 745         ret = true;
 746
 747 cleanup:
 748         free(hash);
 749         if (trusted)
 750                 free_fingerprint_list(trusted);
 751         if (revoked)
 752                 free_fingerprint_list(revoked);
 753         if (sc) {
 754                 free(sc->cert);
 755                 free(sc->sig);
 756                 free(sc->name);
 757                 free(sc);
 758         }
 759
 760         return (ret);
 761 }
 762
 763 static int
 764 bootstrap_pkg(bool force, const char *fetchOpts)
 765 {
 766         int fd_pkg, fd_sig;
 767         int ret;
 768         char url[MAXPATHLEN];
 769         char tmppkg[MAXPATHLEN];
 770         char tmpsig[MAXPATHLEN];
 771         const char *packagesite;
 772         const char *signature_type;
 773         char pkgstatic[MAXPATHLEN];
 774         const char *bootstrap_name;
 775
 776         fd_sig = -1;
 777         ret = -1;
 778
 779         if (config_string(PACKAGESITE, &packagesite) != 0) {
 780                 warnx("No PACKAGESITE defined");
 781                 return (-1);
 782         }
 783
 784         if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
 785                 warnx("Error looking up SIGNATURE_TYPE");
 786                 return (-1);
 787         }
 788
 789         printf("Bootstrapping pkg from %s, please wait...\n", packagesite);
 790
 791         /* Support pkg+http:// for PACKAGESITE which is the new format
 792            in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has
 793            no A record. */
 794         if (strncmp(URL_SCHEME_PREFIX, packagesite,
 795             strlen(URL_SCHEME_PREFIX)) == 0)
 796                 packagesite += strlen(URL_SCHEME_PREFIX);
 797         for (int j = 0; bootstrap_names[j] != NULL; j++) {
 798                 bootstrap_name = bootstrap_names[j];
 799
 800                 snprintf(url, MAXPATHLEN, "%s/Latest/%s", packagesite, bootstrap_name);
 801                 snprintf(tmppkg, MAXPATHLEN, "%s/%s.XXXXXX",
 802                     getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP,
 803                     bootstrap_name);
 804                 if ((fd_pkg = fetch_to_fd(url, tmppkg, fetchOpts)) != -1)
 805                         break;
 806                 bootstrap_name = NULL;
 807         }
 808         if (bootstrap_name == NULL)
 809                 goto fetchfail;
 810
 811         if (signature_type != NULL &&
 812             strcasecmp(signature_type, "NONE") != 0) {
 813                 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
 814
 815                         snprintf(tmpsig, MAXPATHLEN, "%s/%s.sig.XXXXXX",
 816                             getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP,
 817                             bootstrap_name);
 818                         snprintf(url, MAXPATHLEN, "%s/Latest/%s.sig",
 819                             packagesite, bootstrap_name);
 820
 821                         if ((fd_sig = fetch_to_fd(url, tmpsig, fetchOpts)) == -1) {
 822                                 fprintf(stderr, "Signature for pkg not "
 823                                     "available.\n");
 824                                 goto fetchfail;
 825                         }
 826
 827                         if (verify_signature(fd_pkg, fd_sig) == false)
 828                                 goto cleanup;
 829                 } else if (strcasecmp(signature_type, "PUBKEY") == 0) {
 830
 831                         snprintf(tmpsig, MAXPATHLEN,
 832                             "%s/%s.pubkeysig.XXXXXX",
 833                             getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP,
 834                             bootstrap_name);
 835                         snprintf(url, MAXPATHLEN, "%s/Latest/%s.pubkeysig",
 836                             packagesite, bootstrap_name);
 837
 838                         if ((fd_sig = fetch_to_fd(url, tmpsig, fetchOpts)) == -1) {
 839                                 fprintf(stderr, "Signature for pkg not "
 840                                     "available.\n");
 841                                 goto fetchfail;
 842                         }
 843
 844                         if (verify_pubsignature(fd_pkg, fd_sig) == false)
 845                                 goto cleanup;
 846                 } else {
 847                         warnx("Signature type %s is not supported for "
 848                             "bootstrapping.", signature_type);
 849                         goto cleanup;
 850                 }
 851         }
 852
 853         if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
 854                 ret = install_pkg_static(pkgstatic, tmppkg, force);
 855
 856         goto cleanup;
 857
 858 fetchfail:
 859         warnx("Error fetching %s: %s", url, fetchLastErrString);
 860         if (fetchLastErrCode == FETCH_RESOLV) {
 861                 fprintf(stderr, "Address resolution failed for %s.\n", packagesite);
 862                 fprintf(stderr, "Consider changing PACKAGESITE.\n");
 863         } else {
 864                 fprintf(stderr, "A pre-built version of pkg could not be found for "
 865                     "your system.\n");
 866                 fprintf(stderr, "Consider changing PACKAGESITE or installing it from "
 867                     "ports: 'ports-mgmt/pkg'.\n");
 868         }
 869
 870 cleanup:
 871         if (fd_sig != -1) {
 872                 close(fd_sig);
 873                 unlink(tmpsig);
 874         }
 875
 876         if (fd_pkg != -1) {
 877                 close(fd_pkg);
 878                 unlink(tmppkg);
 879         }
 880
 881         return (ret);
 882 }
 883
 884 static const char confirmation_message[] =
 885 "The package management tool is not yet installed on your system.\n"
 886 "Do you want to fetch and install it now? [y/N]: ";
 887
 888 static const char non_interactive_message[] =
 889 "The package management tool is not yet installed on your system.\n"
 890 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap "
 891 "in non-interactive (stdin not being a tty)\n";
 892
 893 static const char args_bootstrap_message[] =
 894 "Too many arguments\n"
 895 "Usage: pkg [-4|-6] bootstrap [-f] [-y]\n";
 896
 897 static const char args_add_message[] =
 898 "Too many arguments\n"
 899 "Usage: pkg add [-f] [-y] {pkg.txz}\n";
 900
 901 static int
 902 pkg_query_yes_no(void)
 903 {
 904         int ret, c;
 905
 906         fflush(stdout);
 907         c = getchar();
 908
 909         if (c == 'y' || c == 'Y')
 910                 ret = 1;
 911         else
 912                 ret = 0;
 913
 914         while (c != '\n' && c != EOF)
 915                 c = getchar();
 916
 917         return (ret);
 918 }
 919
 920 static int
 921 bootstrap_pkg_local(const char *pkgpath, bool force)
 922 {
 923         char path[MAXPATHLEN];
 924         char pkgstatic[MAXPATHLEN];
 925         const char *signature_type;
 926         int fd_pkg, fd_sig, ret;
 927
 928         fd_sig = -1;
 929         ret = -1;
 930
 931         fd_pkg = open(pkgpath, O_RDONLY);
 932         if (fd_pkg == -1)
 933                 err(EXIT_FAILURE, "Unable to open %s", pkgpath);
 934
 935         if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
 936                 warnx("Error looking up SIGNATURE_TYPE");
 937                 goto cleanup;
 938         }
 939         if (signature_type != NULL &&
 940             strcasecmp(signature_type, "NONE") != 0) {
 941                 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
 942
 943                         snprintf(path, sizeof(path), "%s.sig", pkgpath);
 944
 945                         if ((fd_sig = open(path, O_RDONLY)) == -1) {
 946                                 fprintf(stderr, "Signature for pkg not "
 947                                     "available.\n");
 948                                 goto cleanup;
 949                         }
 950
 951                         if (verify_signature(fd_pkg, fd_sig) == false)
 952                                 goto cleanup;
 953
 954                 } else if (strcasecmp(signature_type, "PUBKEY") == 0) {
 955
 956                         snprintf(path, sizeof(path), "%s.pubkeysig", pkgpath);
 957
 958                         if ((fd_sig = open(path, O_RDONLY)) == -1) {
 959                                 fprintf(stderr, "Signature for pkg not "
 960                                     "available.\n");
 961                                 goto cleanup;
 962                         }
 963
 964                         if (verify_pubsignature(fd_pkg, fd_sig) == false)
 965                                 goto cleanup;
 966
 967                 } else {
 968                         warnx("Signature type %s is not supported for "
 969                             "bootstrapping.", signature_type);
 970                         goto cleanup;
 971                 }
 972         }
 973
 974         if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
 975                 ret = install_pkg_static(pkgstatic, pkgpath, force);
 976
 977 cleanup:
 978         close(fd_pkg);
 979         if (fd_sig != -1)
 980                 close(fd_sig);
 981
 982         return (ret);
 983 }
 984
 985 #define PKG_NAME        "pkg"
 986 #define PKG_DEVEL_NAME  PKG_NAME "-devel"
 987 #define PKG_PKG         PKG_NAME "."
 988
 989 static bool
 990 pkg_is_pkg_pkg(const char *pkg)
 991 {
 992         char *vstart, *basename;
 993         size_t namelen;
 994
 995         /* Strip path. */
 996         if ((basename = strrchr(pkg, '/')) != NULL)
 997                 pkg = basename + 1;
 998
 999         /*
1000          * Chop off the final "-" (version delimiter) and check the name that
1001          * precedes it.  If we didn't have a version delimiter, it must be the
1002          * pkg.$archive short form but we'll check it anyways.  pkg-devel short
1003          * form will look like a pkg archive with 'devel' version, but that's
1004          * OK.  We otherwise assumed that non-pkg packages will always have a
1005          * version component.
1006          */
1007         vstart = strrchr(pkg, '-');
1008         if (vstart == NULL) {
1009                 return (strlen(pkg) > sizeof(PKG_PKG) - 1 &&
1010                     strncmp(pkg, PKG_PKG, sizeof(PKG_PKG) - 1) == 0);
1011         }
1012
1013         namelen = vstart - pkg;
1014         if (namelen == sizeof(PKG_NAME) - 1 &&
1015             strncmp(pkg, PKG_NAME, sizeof(PKG_NAME) - 1) == 0)
1016                 return (true);
1017         if (namelen == sizeof(PKG_DEVEL_NAME) - 1 &&
1018             strncmp(pkg, PKG_DEVEL_NAME, sizeof(PKG_DEVEL_NAME) - 1) == 0)
1019                 return (true);
1020         return (false);
1021 }
1022
1023 int
1024 main(int argc, char *argv[])
1025 {
1026         char pkgpath[MAXPATHLEN];
1027         const char *pkgarg, *repo_name;
1028         bool activation_test, add_pkg, bootstrap_only, force, yes;
1029         signed char ch;
1030         const char *fetchOpts;
1031         char *command;
1032
1033         activation_test = false;
1034         add_pkg = false;
1035         bootstrap_only = false;
1036         command = NULL;
1037         fetchOpts = "";
1038         force = false;
1039         pkgarg = NULL;
1040         repo_name = NULL;
1041         yes = false;
1042
1043         struct option longopts[] = {
1044                 { "debug",              no_argument,            NULL,   'd' },
1045                 { "force",              no_argument,            NULL,   'f' },
1046                 { "only-ipv4",          no_argument,            NULL,   '4' },
1047                 { "only-ipv6",          no_argument,            NULL,   '6' },
1048                 { "yes",                no_argument,            NULL,   'y' },
1049                 { NULL,                 0,                      NULL,   0   },
1050         };
1051
1052         snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", getlocalbase());
1053
1054         while ((ch = getopt_long(argc, argv, "-:dfr::yN46", longopts, NULL)) != -1) {
1055                 switch (ch) {
1056                 case 'd':
1057                         debug++;
1058                         break;
1059                 case 'f':
1060                         force = true;
1061                         break;
1062                 case 'N':
1063                         activation_test = true;
1064                         break;
1065                 case 'y':
1066                         yes = true;
1067                         break;
1068                 case '4':
1069                         fetchOpts = "4";
1070                         break;
1071                 case '6':
1072                         fetchOpts = "6";
1073                         break;
1074                 case 'r':
1075                         /*
1076                          * The repository can only be specified for an explicit
1077                          * bootstrap request at this time, so that we don't
1078                          * confuse the user if they're trying to use a verb that
1079                          * has some other conflicting meaning but we need to
1080                          * bootstrap.
1081                          *
1082                          * For that reason, we specify that -r has an optional
1083                          * argument above and process the next index ourselves.
1084                          * This is mostly significant because getopt(3) will
1085                          * otherwise eat the next argument, which could be
1086                          * something we need to try and make sense of.
1087                          *
1088                          * At worst this gets us false positives that we ignore
1089                          * in other contexts, and we have to do a little fudging
1090                          * in order to support separating -r from the reponame
1091                          * with a space since it's not actually optional in
1092                          * the bootstrap/add sense.
1093                          */
1094                         if (add_pkg || bootstrap_only) {
1095                                 if (optarg != NULL) {
1096                                         repo_name = optarg;
1097                                 } else if (optind < argc) {
1098                                         repo_name = argv[optind];
1099                                 }
1100
1101                                 if (repo_name == NULL || *repo_name == '\0') {
1102                                         fprintf(stderr,
1103                                             "Must specify a repository with -r!\n");
1104                                         exit(EXIT_FAILURE);
1105                                 }
1106
1107                                 if (optarg == NULL) {
1108                                         /* Advance past repo name. */
1109                                         optreset = 1;
1110                                         optind++;
1111                                 }
1112                         }
1113                         break;
1114                 case 1:
1115                         // Non-option arguments, first one is the command
1116                         if (command == NULL) {
1117                                 command = argv[optind-1];
1118                                 if (strcmp(command, "add") == 0) {
1119                                         add_pkg = true;
1120                                 }
1121                                 else if (strcmp(command, "bootstrap") == 0) {
1122                                         bootstrap_only = true;
1123                                 }
1124                         }
1125                         // bootstrap doesn't accept other arguments
1126                         else if (bootstrap_only) {
1127                                 fprintf(stderr, args_bootstrap_message);
1128                                 exit(EXIT_FAILURE);
1129                         }
1130                         else if (add_pkg && pkgarg != NULL) {
1131                                 /*
1132                                  * Additional arguments also means it's not a
1133                                  * local bootstrap request.
1134                                  */
1135                                 add_pkg = false;
1136                         }
1137                         else if (add_pkg) {
1138                                 /*
1139                                  * If it's not a request for pkg or pkg-devel,
1140                                  * then we must assume they were trying to
1141                                  * install some other local package and we
1142                                  * should try to bootstrap from the repo.
1143                                  */
1144                                 if (!pkg_is_pkg_pkg(argv[optind-1])) {
1145                                         add_pkg = false;
1146                                 } else {
1147                                         pkgarg = argv[optind-1];
1148                                 }
1149                         }
1150                         break;
1151                 default:
1152                         break;
1153                 }
1154         }
1155         if (debug > 1)
1156                 fetchDebug = 1;
1157
1158         if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) {
1159                 /*
1160                  * To allow 'pkg -N' to be used as a reliable test for whether
1161                  * a system is configured to use pkg, don't bootstrap pkg
1162                  * when that option is passed.
1163                  */
1164                 if (activation_test)
1165                         errx(EXIT_FAILURE, "pkg is not installed");
1166
1167                 config_init(repo_name);
1168
1169                 if (add_pkg) {
1170                         if (pkgarg == NULL) {
1171                                 fprintf(stderr, "Path to pkg.txz required\n");
1172                                 exit(EXIT_FAILURE);
1173                         }
1174                         if (access(pkgarg, R_OK) == -1) {
1175                                 fprintf(stderr, "No such file: %s\n", pkgarg);
1176                                 exit(EXIT_FAILURE);
1177                         }
1178                         if (bootstrap_pkg_local(pkgarg, force) != 0)
1179                                 exit(EXIT_FAILURE);
1180                         exit(EXIT_SUCCESS);
1181                 }
1182                 /*
1183                  * Do not ask for confirmation if either of stdin or stdout is
1184                  * not tty. Check the environment to see if user has answer
1185                  * tucked in there already.
1186                  */
1187                 if (!yes)
1188                         config_bool(ASSUME_ALWAYS_YES, &yes);
1189                 if (!yes) {
1190                         if (!isatty(fileno(stdin))) {
1191                                 fprintf(stderr, non_interactive_message);
1192                                 exit(EXIT_FAILURE);
1193                         }
1194
1195                         printf("%s", confirmation_message);
1196                         if (pkg_query_yes_no() == 0)
1197                                 exit(EXIT_FAILURE);
1198                 }
1199                 if (bootstrap_pkg(force, fetchOpts) != 0)
1200                         exit(EXIT_FAILURE);
1201                 config_finish();
1202
1203                 if (bootstrap_only)
1204                         exit(EXIT_SUCCESS);
1205         } else if (bootstrap_only) {
1206                 printf("pkg already bootstrapped at %s\n", pkgpath);
1207                 exit(EXIT_SUCCESS);
1208         }
1209
1210         execv(pkgpath, argv);
1211
1212         /* NOT REACHED */
1213         return (EXIT_FAILURE);
1214 }