pkg.c revision 283787
1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2012-2014 Baptiste Daroussin <bapt@FreeBSD.org> 3219820Sjeff * Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org> 4219820Sjeff * All rights reserved. 5271127Shselasky * 6219820Sjeff * Redistribution and use in source and binary forms, with or without 7219820Sjeff * modification, are permitted provided that the following conditions 8219820Sjeff * are met: 9219820Sjeff * 1. Redistributions of source code must retain the above copyright 10219820Sjeff * notice, this list of conditions and the following disclaimer. 11219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 12219820Sjeff * notice, this list of conditions and the following disclaimer in the 13219820Sjeff * documentation and/or other materials provided with the distribution. 14219820Sjeff * 15219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16219820Sjeff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17219820Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18219820Sjeff * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19219820Sjeff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20219820Sjeff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21219820Sjeff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22219820Sjeff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23219820Sjeff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24219820Sjeff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25219820Sjeff * SUCH DAMAGE. 26219820Sjeff */ 27219820Sjeff 28219820Sjeff#include <sys/cdefs.h> 29219820Sjeff__FBSDID("$FreeBSD: stable/10/usr.sbin/pkg/pkg.c 283787 2015-05-30 21:23:41Z bapt $"); 30219820Sjeff 31219820Sjeff#include <sys/param.h> 32219820Sjeff#include <sys/queue.h> 33219820Sjeff#include <sys/types.h> 34219820Sjeff#include <sys/sbuf.h> 35219820Sjeff#include <sys/wait.h> 36219820Sjeff 37219820Sjeff#define _WITH_GETLINE 38219820Sjeff#include <archive.h> 39219820Sjeff#include <archive_entry.h> 40219820Sjeff#include <dirent.h> 41219820Sjeff#include <err.h> 42222813Sattilio#include <errno.h> 43276744Srodrigc#include <fcntl.h> 44219820Sjeff#include <fetch.h> 45219820Sjeff#include <paths.h> 46219820Sjeff#include <stdbool.h> 47219820Sjeff#include <stdlib.h> 48219820Sjeff#include <stdio.h> 49219820Sjeff#include <string.h> 50219820Sjeff#include <time.h> 51219820Sjeff#include <unistd.h> 52219820Sjeff#include <ucl.h> 53219820Sjeff 54219820Sjeff#include <openssl/err.h> 55219820Sjeff#include <openssl/ssl.h> 56276744Srodrigc 57219820Sjeff#include "dns_utils.h" 58219820Sjeff#include "config.h" 59219820Sjeff 60277139Shselaskystruct sig_cert { 61219820Sjeff char *name; 62219820Sjeff unsigned char *sig; 63219820Sjeff int siglen; 64219820Sjeff unsigned char *cert; 65219820Sjeff int certlen; 66219820Sjeff bool trusted; 67219820Sjeff}; 68219820Sjeff 69219820Sjefftypedef enum { 70219820Sjeff HASH_UNKNOWN, 71219820Sjeff HASH_SHA256, 72219820Sjeff} hash_t; 73219820Sjeff 74219820Sjeffstruct fingerprint { 75219820Sjeff hash_t type; 76219820Sjeff char *name; 77219820Sjeff char hash[BUFSIZ]; 78219820Sjeff STAILQ_ENTRY(fingerprint) next; 79219820Sjeff}; 80219820Sjeff 81219820SjeffSTAILQ_HEAD(fingerprint_list, fingerprint); 82219820Sjeff 83219820Sjeffstatic int 84219820Sjeffextract_pkg_static(int fd, char *p, int sz) 85219820Sjeff{ 86219820Sjeff struct archive *a; 87219820Sjeff struct archive_entry *ae; 88219820Sjeff char *end; 89219820Sjeff int ret, r; 90219820Sjeff 91219820Sjeff ret = -1; 92219820Sjeff a = archive_read_new(); 93219820Sjeff if (a == NULL) { 94219820Sjeff warn("archive_read_new"); 95219820Sjeff return (ret); 96219820Sjeff } 97219820Sjeff archive_read_support_filter_all(a); 98219820Sjeff archive_read_support_format_tar(a); 99219820Sjeff 100219820Sjeff if (lseek(fd, 0, 0) == -1) { 101219820Sjeff warn("lseek"); 102219820Sjeff goto cleanup; 103219820Sjeff } 104219820Sjeff 105219820Sjeff if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { 106219820Sjeff warnx("archive_read_open_fd: %s", archive_error_string(a)); 107219820Sjeff goto cleanup; 108219820Sjeff } 109219820Sjeff 110219820Sjeff ae = NULL; 111219820Sjeff while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { 112219820Sjeff end = strrchr(archive_entry_pathname(ae), '/'); 113219820Sjeff if (end == NULL) 114219820Sjeff continue; 115219820Sjeff 116219820Sjeff if (strcmp(end, "/pkg-static") == 0) { 117219820Sjeff r = archive_read_extract(a, ae, 118255932Salfred ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | 119255932Salfred ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | 120255932Salfred ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); 121219820Sjeff strlcpy(p, archive_entry_pathname(ae), sz); 122219820Sjeff break; 123219820Sjeff } 124219820Sjeff } 125219820Sjeff 126219820Sjeff if (r == ARCHIVE_OK) 127219820Sjeff ret = 0; 128219820Sjeff else 129219820Sjeff warnx("failed to extract pkg-static: %s", 130219820Sjeff archive_error_string(a)); 131219820Sjeff 132219820Sjeffcleanup: 133219820Sjeff archive_read_free(a); 134219820Sjeff return (ret); 135219820Sjeff 136219820Sjeff} 137219820Sjeff 138219820Sjeffstatic int 139219820Sjeffinstall_pkg_static(const char *path, const char *pkgpath, bool force) 140219820Sjeff{ 141219820Sjeff int pstat; 142219820Sjeff pid_t pid; 143219820Sjeff 144219820Sjeff switch ((pid = fork())) { 145219820Sjeff case -1: 146219820Sjeff return (-1); 147219820Sjeff case 0: 148219820Sjeff if (force) 149219820Sjeff execl(path, "pkg-static", "add", "-f", pkgpath, 150219820Sjeff (char *)NULL); 151219820Sjeff else 152219820Sjeff execl(path, "pkg-static", "add", pkgpath, 153219820Sjeff (char *)NULL); 154219820Sjeff _exit(1); 155219820Sjeff default: 156219820Sjeff break; 157219820Sjeff } 158219820Sjeff 159219820Sjeff while (waitpid(pid, &pstat, 0) == -1) 160219820Sjeff if (errno != EINTR) 161219820Sjeff return (-1); 162219820Sjeff 163219820Sjeff if (WEXITSTATUS(pstat)) 164219820Sjeff return (WEXITSTATUS(pstat)); 165219820Sjeff else if (WIFSIGNALED(pstat)) 166219820Sjeff return (128 & (WTERMSIG(pstat))); 167219820Sjeff return (pstat); 168219820Sjeff} 169219820Sjeff 170219820Sjeffstatic int 171219820Sjefffetch_to_fd(const char *url, char *path) 172219820Sjeff{ 173219820Sjeff struct url *u; 174219820Sjeff struct dns_srvinfo *mirrors, *current; 175219820Sjeff struct url_stat st; 176219820Sjeff FILE *remote; 177219820Sjeff /* To store _https._tcp. + hostname + \0 */ 178219820Sjeff int fd; 179219820Sjeff int retry, max_retry; 180219820Sjeff off_t done, r; 181219820Sjeff time_t now, last; 182219820Sjeff char buf[10240]; 183219820Sjeff char zone[MAXHOSTNAMELEN + 13]; 184219820Sjeff static const char *mirror_type = NULL; 185219820Sjeff 186219820Sjeff done = 0; 187219820Sjeff last = 0; 188219820Sjeff max_retry = 3; 189219820Sjeff current = mirrors = NULL; 190219820Sjeff remote = NULL; 191219820Sjeff 192219820Sjeff if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type) 193219820Sjeff != 0) { 194219820Sjeff warnx("No MIRROR_TYPE defined"); 195219820Sjeff return (-1); 196219820Sjeff } 197219820Sjeff 198219820Sjeff if ((fd = mkstemp(path)) == -1) { 199219820Sjeff warn("mkstemp()"); 200219820Sjeff return (-1); 201219820Sjeff } 202219820Sjeff 203219820Sjeff retry = max_retry; 204219820Sjeff 205219820Sjeff if ((u = fetchParseURL(url)) == NULL) { 206219820Sjeff warn("fetchParseURL('%s')", url); 207219820Sjeff return (-1); 208219820Sjeff } 209219820Sjeff 210219820Sjeff while (remote == NULL) { 211219820Sjeff if (retry == max_retry) { 212219820Sjeff if (strcmp(u->scheme, "file") != 0 && 213219820Sjeff strcasecmp(mirror_type, "srv") == 0) { 214219820Sjeff snprintf(zone, sizeof(zone), 215219820Sjeff "_%s._tcp.%s", u->scheme, u->host); 216219820Sjeff mirrors = dns_getsrvinfo(zone); 217219820Sjeff current = mirrors; 218219820Sjeff } 219219820Sjeff } 220219820Sjeff 221219820Sjeff if (mirrors != NULL) { 222219820Sjeff strlcpy(u->host, current->host, sizeof(u->host)); 223219820Sjeff u->port = current->port; 224219820Sjeff } 225219820Sjeff 226219820Sjeff remote = fetchXGet(u, &st, ""); 227219820Sjeff if (remote == NULL) { 228219820Sjeff --retry; 229219820Sjeff if (retry <= 0) 230219820Sjeff goto fetchfail; 231219820Sjeff if (mirrors == NULL) { 232219820Sjeff sleep(1); 233219820Sjeff } else { 234219820Sjeff current = current->next; 235219820Sjeff if (current == NULL) 236219820Sjeff current = mirrors; 237219820Sjeff } 238219820Sjeff } 239219820Sjeff } 240219820Sjeff 241219820Sjeff while (done < st.size) { 242219820Sjeff if ((r = fread(buf, 1, sizeof(buf), remote)) < 1) 243219820Sjeff break; 244219820Sjeff 245219820Sjeff if (write(fd, buf, r) != r) { 246219820Sjeff warn("write()"); 247219820Sjeff goto fetchfail; 248219820Sjeff } 249219820Sjeff 250219820Sjeff done += r; 251219820Sjeff now = time(NULL); 252219820Sjeff if (now > last || done == st.size) 253219820Sjeff last = now; 254219820Sjeff } 255219820Sjeff 256219820Sjeff if (ferror(remote)) 257219820Sjeff goto fetchfail; 258219820Sjeff 259219820Sjeff goto cleanup; 260219820Sjeff 261219820Sjefffetchfail: 262219820Sjeff if (fd != -1) { 263219820Sjeff close(fd); 264219820Sjeff fd = -1; 265219820Sjeff unlink(path); 266219820Sjeff } 267219820Sjeff 268219820Sjeffcleanup: 269219820Sjeff if (remote != NULL) 270219820Sjeff fclose(remote); 271219820Sjeff 272219820Sjeff return fd; 273219820Sjeff} 274219820Sjeff 275219820Sjeffstatic struct fingerprint * 276219820Sjeffparse_fingerprint(ucl_object_t *obj) 277219820Sjeff{ 278219820Sjeff const ucl_object_t *cur; 279219820Sjeff ucl_object_iter_t it = NULL; 280219820Sjeff const char *function, *fp, *key; 281219820Sjeff struct fingerprint *f; 282219820Sjeff hash_t fct = HASH_UNKNOWN; 283219820Sjeff 284219820Sjeff function = fp = NULL; 285219820Sjeff 286219820Sjeff while ((cur = ucl_iterate_object(obj, &it, true))) { 287219820Sjeff key = ucl_object_key(cur); 288219820Sjeff if (cur->type != UCL_STRING) 289219820Sjeff continue; 290219820Sjeff if (strcasecmp(key, "function") == 0) { 291219820Sjeff function = ucl_object_tostring(cur); 292219820Sjeff continue; 293219820Sjeff } 294219820Sjeff if (strcasecmp(key, "fingerprint") == 0) { 295219820Sjeff fp = ucl_object_tostring(cur); 296219820Sjeff continue; 297219820Sjeff } 298219820Sjeff } 299219820Sjeff 300219820Sjeff if (fp == NULL || function == NULL) 301219820Sjeff return (NULL); 302219820Sjeff 303219820Sjeff if (strcasecmp(function, "sha256") == 0) 304219820Sjeff fct = HASH_SHA256; 305219820Sjeff 306219820Sjeff if (fct == HASH_UNKNOWN) { 307219820Sjeff warnx("Unsupported hashing function: %s", function); 308219820Sjeff return (NULL); 309219820Sjeff } 310219820Sjeff 311219820Sjeff f = calloc(1, sizeof(struct fingerprint)); 312219820Sjeff f->type = fct; 313219820Sjeff strlcpy(f->hash, fp, sizeof(f->hash)); 314271127Shselasky 315271127Shselasky return (f); 316271127Shselasky} 317271127Shselasky 318271127Shselaskystatic void 319271127Shselaskyfree_fingerprint_list(struct fingerprint_list* list) 320271127Shselasky{ 321271127Shselasky struct fingerprint *fingerprint, *tmp; 322271127Shselasky 323271127Shselasky STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) { 324271127Shselasky if (fingerprint->name) 325271127Shselasky free(fingerprint->name); 326271127Shselasky free(fingerprint); 327271127Shselasky } 328271127Shselasky free(list); 329271127Shselasky} 330271127Shselasky 331271127Shselaskystatic struct fingerprint * 332271127Shselaskyload_fingerprint(const char *dir, const char *filename) 333271127Shselasky{ 334271127Shselasky ucl_object_t *obj = NULL; 335271127Shselasky struct ucl_parser *p = NULL; 336271127Shselasky struct fingerprint *f; 337271127Shselasky char path[MAXPATHLEN]; 338271127Shselasky 339271127Shselasky f = NULL; 340271127Shselasky 341271127Shselasky snprintf(path, MAXPATHLEN, "%s/%s", dir, filename); 342271127Shselasky 343271127Shselasky p = ucl_parser_new(0); 344271127Shselasky if (!ucl_parser_add_file(p, path)) { 345271127Shselasky warnx("%s: %s", path, ucl_parser_get_error(p)); 346271127Shselasky ucl_parser_free(p); 347271127Shselasky return (NULL); 348271127Shselasky } 349271127Shselasky 350271127Shselasky obj = ucl_parser_get_object(p); 351271127Shselasky 352271127Shselasky if (obj->type == UCL_OBJECT) 353271127Shselasky f = parse_fingerprint(obj); 354271127Shselasky 355271127Shselasky if (f != NULL) 356271127Shselasky f->name = strdup(filename); 357271127Shselasky 358271127Shselasky ucl_object_unref(obj); 359271127Shselasky ucl_parser_free(p); 360271127Shselasky 361271127Shselasky return (f); 362271127Shselasky} 363271127Shselasky 364271127Shselaskystatic struct fingerprint_list * 365271127Shselaskyload_fingerprints(const char *path, int *count) 366271127Shselasky{ 367271127Shselasky DIR *d; 368271127Shselasky struct dirent *ent; 369271127Shselasky struct fingerprint *finger; 370271127Shselasky struct fingerprint_list *fingerprints; 371271127Shselasky 372271127Shselasky *count = 0; 373271127Shselasky 374219820Sjeff fingerprints = calloc(1, sizeof(struct fingerprint_list)); 375219820Sjeff if (fingerprints == NULL) 376219820Sjeff return (NULL); 377219820Sjeff STAILQ_INIT(fingerprints); 378219820Sjeff 379219820Sjeff if ((d = opendir(path)) == NULL) { 380219820Sjeff free(fingerprints); 381219820Sjeff 382219820Sjeff return (NULL); 383219820Sjeff } 384219820Sjeff 385219820Sjeff while ((ent = readdir(d))) { 386219820Sjeff if (strcmp(ent->d_name, ".") == 0 || 387219820Sjeff strcmp(ent->d_name, "..") == 0) 388219820Sjeff continue; 389219820Sjeff finger = load_fingerprint(path, ent->d_name); 390219820Sjeff if (finger != NULL) { 391219820Sjeff STAILQ_INSERT_TAIL(fingerprints, finger, next); 392219820Sjeff ++(*count); 393219820Sjeff } 394271127Shselasky } 395271127Shselasky 396271127Shselasky closedir(d); 397271127Shselasky 398271127Shselasky return (fingerprints); 399219820Sjeff} 400219820Sjeff 401static void 402sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH], 403 char out[SHA256_DIGEST_LENGTH * 2 + 1]) 404{ 405 int i; 406 407 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) 408 sprintf(out + (i * 2), "%02x", hash[i]); 409 410 out[SHA256_DIGEST_LENGTH * 2] = '\0'; 411} 412 413static void 414sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 415{ 416 unsigned char hash[SHA256_DIGEST_LENGTH]; 417 SHA256_CTX sha256; 418 419 out[0] = '\0'; 420 421 SHA256_Init(&sha256); 422 SHA256_Update(&sha256, buf, len); 423 SHA256_Final(hash, &sha256); 424 sha256_hash(hash, out); 425} 426 427static int 428sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1]) 429{ 430 int my_fd; 431 FILE *fp; 432 char buffer[BUFSIZ]; 433 unsigned char hash[SHA256_DIGEST_LENGTH]; 434 size_t r; 435 int ret; 436 SHA256_CTX sha256; 437 438 my_fd = -1; 439 fp = NULL; 440 r = 0; 441 ret = 1; 442 443 out[0] = '\0'; 444 445 /* Duplicate the fd so that fclose(3) does not close it. */ 446 if ((my_fd = dup(fd)) == -1) { 447 warnx("dup"); 448 goto cleanup; 449 } 450 451 if ((fp = fdopen(my_fd, "rb")) == NULL) { 452 warnx("fdopen"); 453 goto cleanup; 454 } 455 456 SHA256_Init(&sha256); 457 458 while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0) 459 SHA256_Update(&sha256, buffer, r); 460 461 if (ferror(fp) != 0) { 462 warnx("fread"); 463 goto cleanup; 464 } 465 466 SHA256_Final(hash, &sha256); 467 sha256_hash(hash, out); 468 ret = 0; 469 470cleanup: 471 if (fp != NULL) 472 fclose(fp); 473 else if (my_fd != -1) 474 close(my_fd); 475 (void)lseek(fd, 0, SEEK_SET); 476 477 return (ret); 478} 479 480static EVP_PKEY * 481load_public_key_buf(const unsigned char *cert, int certlen) 482{ 483 EVP_PKEY *pkey; 484 BIO *bp; 485 char errbuf[1024]; 486 487 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen); 488 489 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL) 490 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 491 492 BIO_free(bp); 493 494 return (pkey); 495} 496 497static bool 498rsa_verify_cert(int fd, const unsigned char *key, int keylen, 499 unsigned char *sig, int siglen) 500{ 501 EVP_MD_CTX *mdctx; 502 EVP_PKEY *pkey; 503 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2]; 504 char errbuf[1024]; 505 bool ret; 506 507 pkey = NULL; 508 mdctx = NULL; 509 ret = false; 510 511 /* Compute SHA256 of the package. */ 512 if (lseek(fd, 0, 0) == -1) { 513 warn("lseek"); 514 goto cleanup; 515 } 516 if ((sha256_fd(fd, sha256)) == -1) { 517 warnx("Error creating SHA256 hash for package"); 518 goto cleanup; 519 } 520 521 if ((pkey = load_public_key_buf(key, keylen)) == NULL) { 522 warnx("Error reading public key"); 523 goto cleanup; 524 } 525 526 /* Verify signature of the SHA256(pkg) is valid. */ 527 if ((mdctx = EVP_MD_CTX_create()) == NULL) { 528 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 529 goto error; 530 } 531 532 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) { 533 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 534 goto error; 535 } 536 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) { 537 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 538 goto error; 539 } 540 541 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) { 542 warnx("%s", ERR_error_string(ERR_get_error(), errbuf)); 543 goto error; 544 } 545 546 ret = true; 547 printf("done\n"); 548 goto cleanup; 549 550error: 551 printf("failed\n"); 552 553cleanup: 554 if (pkey) 555 EVP_PKEY_free(pkey); 556 if (mdctx) 557 EVP_MD_CTX_destroy(mdctx); 558 ERR_free_strings(); 559 560 return (ret); 561} 562 563static struct sig_cert * 564parse_cert(int fd) { 565 int my_fd; 566 struct sig_cert *sc; 567 FILE *fp; 568 struct sbuf *buf, *sig, *cert; 569 char *line; 570 size_t linecap; 571 ssize_t linelen; 572 573 buf = NULL; 574 my_fd = -1; 575 sc = NULL; 576 line = NULL; 577 linecap = 0; 578 579 if (lseek(fd, 0, 0) == -1) { 580 warn("lseek"); 581 return (NULL); 582 } 583 584 /* Duplicate the fd so that fclose(3) does not close it. */ 585 if ((my_fd = dup(fd)) == -1) { 586 warnx("dup"); 587 return (NULL); 588 } 589 590 if ((fp = fdopen(my_fd, "rb")) == NULL) { 591 warn("fdopen"); 592 close(my_fd); 593 return (NULL); 594 } 595 596 sig = sbuf_new_auto(); 597 cert = sbuf_new_auto(); 598 599 while ((linelen = getline(&line, &linecap, fp)) > 0) { 600 if (strcmp(line, "SIGNATURE\n") == 0) { 601 buf = sig; 602 continue; 603 } else if (strcmp(line, "CERT\n") == 0) { 604 buf = cert; 605 continue; 606 } else if (strcmp(line, "END\n") == 0) { 607 break; 608 } 609 if (buf != NULL) 610 sbuf_bcat(buf, line, linelen); 611 } 612 613 fclose(fp); 614 615 /* Trim out unrelated trailing newline */ 616 sbuf_setpos(sig, sbuf_len(sig) - 1); 617 618 sbuf_finish(sig); 619 sbuf_finish(cert); 620 621 sc = calloc(1, sizeof(struct sig_cert)); 622 sc->siglen = sbuf_len(sig); 623 sc->sig = calloc(1, sc->siglen); 624 memcpy(sc->sig, sbuf_data(sig), sc->siglen); 625 626 sc->certlen = sbuf_len(cert); 627 sc->cert = strdup(sbuf_data(cert)); 628 629 sbuf_delete(sig); 630 sbuf_delete(cert); 631 632 return (sc); 633} 634 635static bool 636verify_signature(int fd_pkg, int fd_sig) 637{ 638 struct fingerprint_list *trusted, *revoked; 639 struct fingerprint *fingerprint; 640 struct sig_cert *sc; 641 bool ret; 642 int trusted_count, revoked_count; 643 const char *fingerprints; 644 char path[MAXPATHLEN]; 645 char hash[SHA256_DIGEST_LENGTH * 2 + 1]; 646 647 sc = NULL; 648 trusted = revoked = NULL; 649 ret = false; 650 651 /* Read and parse fingerprints. */ 652 if (config_string(FINGERPRINTS, &fingerprints) != 0) { 653 warnx("No CONFIG_FINGERPRINTS defined"); 654 goto cleanup; 655 } 656 657 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints); 658 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) { 659 warnx("Error loading trusted certificates"); 660 goto cleanup; 661 } 662 663 if (trusted_count == 0 || trusted == NULL) { 664 fprintf(stderr, "No trusted certificates found.\n"); 665 goto cleanup; 666 } 667 668 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints); 669 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) { 670 warnx("Error loading revoked certificates"); 671 goto cleanup; 672 } 673 674 /* Read certificate and signature in. */ 675 if ((sc = parse_cert(fd_sig)) == NULL) { 676 warnx("Error parsing certificate"); 677 goto cleanup; 678 } 679 /* Explicitly mark as non-trusted until proven otherwise. */ 680 sc->trusted = false; 681 682 /* Parse signature and pubkey out of the certificate */ 683 sha256_buf(sc->cert, sc->certlen, hash); 684 685 /* Check if this hash is revoked */ 686 if (revoked != NULL) { 687 STAILQ_FOREACH(fingerprint, revoked, next) { 688 if (strcasecmp(fingerprint->hash, hash) == 0) { 689 fprintf(stderr, "The package was signed with " 690 "revoked certificate %s\n", 691 fingerprint->name); 692 goto cleanup; 693 } 694 } 695 } 696 697 STAILQ_FOREACH(fingerprint, trusted, next) { 698 if (strcasecmp(fingerprint->hash, hash) == 0) { 699 sc->trusted = true; 700 sc->name = strdup(fingerprint->name); 701 break; 702 } 703 } 704 705 if (sc->trusted == false) { 706 fprintf(stderr, "No trusted fingerprint found matching " 707 "package's certificate\n"); 708 goto cleanup; 709 } 710 711 /* Verify the signature. */ 712 printf("Verifying signature with trusted certificate %s... ", sc->name); 713 if (rsa_verify_cert(fd_pkg, sc->cert, sc->certlen, sc->sig, 714 sc->siglen) == false) { 715 fprintf(stderr, "Signature is not valid\n"); 716 goto cleanup; 717 } 718 719 ret = true; 720 721cleanup: 722 if (trusted) 723 free_fingerprint_list(trusted); 724 if (revoked) 725 free_fingerprint_list(revoked); 726 if (sc) { 727 if (sc->cert) 728 free(sc->cert); 729 if (sc->sig) 730 free(sc->sig); 731 if (sc->name) 732 free(sc->name); 733 free(sc); 734 } 735 736 return (ret); 737} 738 739static int 740bootstrap_pkg(bool force) 741{ 742 int fd_pkg, fd_sig; 743 int ret; 744 char url[MAXPATHLEN]; 745 char tmppkg[MAXPATHLEN]; 746 char tmpsig[MAXPATHLEN]; 747 const char *packagesite; 748 const char *signature_type; 749 char pkgstatic[MAXPATHLEN]; 750 751 fd_sig = -1; 752 ret = -1; 753 754 if (config_string(PACKAGESITE, &packagesite) != 0) { 755 warnx("No PACKAGESITE defined"); 756 return (-1); 757 } 758 759 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 760 warnx("Error looking up SIGNATURE_TYPE"); 761 return (-1); 762 } 763 764 printf("Bootstrapping pkg from %s, please wait...\n", packagesite); 765 766 /* Support pkg+http:// for PACKAGESITE which is the new format 767 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has 768 no A record. */ 769 if (strncmp(URL_SCHEME_PREFIX, packagesite, 770 strlen(URL_SCHEME_PREFIX)) == 0) 771 packagesite += strlen(URL_SCHEME_PREFIX); 772 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite); 773 774 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 775 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 776 777 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1) 778 goto fetchfail; 779 780 if (signature_type != NULL && 781 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 782 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX", 783 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 784 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig", 785 packagesite); 786 787 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) { 788 fprintf(stderr, "Signature for pkg not available.\n"); 789 goto fetchfail; 790 } 791 792 if (verify_signature(fd_pkg, fd_sig) == false) 793 goto cleanup; 794 } 795 796 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 797 ret = install_pkg_static(pkgstatic, tmppkg, force); 798 799 goto cleanup; 800 801fetchfail: 802 warnx("Error fetching %s: %s", url, fetchLastErrString); 803 fprintf(stderr, "A pre-built version of pkg could not be found for " 804 "your system.\n"); 805 fprintf(stderr, "Consider changing PACKAGESITE or installing it from " 806 "ports: 'ports-mgmt/pkg'.\n"); 807 808cleanup: 809 if (fd_sig != -1) { 810 close(fd_sig); 811 unlink(tmpsig); 812 } 813 814 if (fd_pkg != -1) { 815 close(fd_pkg); 816 unlink(tmppkg); 817 } 818 819 return (ret); 820} 821 822static const char confirmation_message[] = 823"The package management tool is not yet installed on your system.\n" 824"Do you want to fetch and install it now? [y/N]: "; 825 826static int 827pkg_query_yes_no(void) 828{ 829 int ret, c; 830 831 c = getchar(); 832 833 if (c == 'y' || c == 'Y') 834 ret = 1; 835 else 836 ret = 0; 837 838 while (c != '\n' && c != EOF) 839 c = getchar(); 840 841 return (ret); 842} 843 844static int 845bootstrap_pkg_local(const char *pkgpath, bool force) 846{ 847 char path[MAXPATHLEN]; 848 char pkgstatic[MAXPATHLEN]; 849 const char *signature_type; 850 int fd_pkg, fd_sig, ret; 851 852 fd_sig = -1; 853 ret = -1; 854 855 fd_pkg = open(pkgpath, O_RDONLY); 856 if (fd_pkg == -1) 857 err(EXIT_FAILURE, "Unable to open %s", pkgpath); 858 859 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) { 860 warnx("Error looking up SIGNATURE_TYPE"); 861 goto cleanup; 862 } 863 if (signature_type != NULL && 864 strcasecmp(signature_type, "FINGERPRINTS") == 0) { 865 snprintf(path, sizeof(path), "%s.sig", pkgpath); 866 867 if ((fd_sig = open(path, O_RDONLY)) == -1) { 868 fprintf(stderr, "Signature for pkg not available.\n"); 869 goto cleanup; 870 } 871 872 if (verify_signature(fd_pkg, fd_sig) == false) 873 goto cleanup; 874 } 875 876 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0) 877 ret = install_pkg_static(pkgstatic, pkgpath, force); 878 879cleanup: 880 close(fd_pkg); 881 if (fd_sig != -1) 882 close(fd_sig); 883 884 return (ret); 885} 886 887int 888main(__unused int argc, char *argv[]) 889{ 890 char pkgpath[MAXPATHLEN]; 891 const char *pkgarg; 892 bool bootstrap_only, force, yes; 893 894 bootstrap_only = false; 895 force = false; 896 pkgarg = NULL; 897 yes = false; 898 899 snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", 900 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); 901 902 if (argc > 1 && strcmp(argv[1], "bootstrap") == 0) { 903 bootstrap_only = true; 904 if (argc == 3 && strcmp(argv[2], "-f") == 0) 905 force = true; 906 } 907 908 if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) { 909 /* 910 * To allow 'pkg -N' to be used as a reliable test for whether 911 * a system is configured to use pkg, don't bootstrap pkg 912 * when that argument is given as argv[1]. 913 */ 914 if (argv[1] != NULL && strcmp(argv[1], "-N") == 0) 915 errx(EXIT_FAILURE, "pkg is not installed"); 916 917 config_init(); 918 919 if (argc > 1 && strcmp(argv[1], "add") == 0) { 920 if (argc > 2 && strcmp(argv[2], "-f") == 0) { 921 force = true; 922 pkgarg = argv[3]; 923 } else 924 pkgarg = argv[2]; 925 if (pkgarg == NULL) { 926 fprintf(stderr, "Path to pkg.txz required\n"); 927 exit(EXIT_FAILURE); 928 } 929 if (access(pkgarg, R_OK) == -1) { 930 fprintf(stderr, "No such file: %s\n", pkgarg); 931 exit(EXIT_FAILURE); 932 } 933 if (bootstrap_pkg_local(pkgarg, force) != 0) 934 exit(EXIT_FAILURE); 935 exit(EXIT_SUCCESS); 936 } 937 /* 938 * Do not ask for confirmation if either of stdin or stdout is 939 * not tty. Check the environment to see if user has answer 940 * tucked in there already. 941 */ 942 config_bool(ASSUME_ALWAYS_YES, &yes); 943 if (!yes) { 944 printf("%s", confirmation_message); 945 if (!isatty(fileno(stdin))) 946 exit(EXIT_FAILURE); 947 948 if (pkg_query_yes_no() == 0) 949 exit(EXIT_FAILURE); 950 } 951 if (bootstrap_pkg(force) != 0) 952 exit(EXIT_FAILURE); 953 config_finish(); 954 955 if (bootstrap_only) 956 exit(EXIT_SUCCESS); 957 } else if (bootstrap_only) { 958 printf("pkg already bootstrapped at %s\n", pkgpath); 959 exit(EXIT_SUCCESS); 960 } 961 962 execv(pkgpath, argv); 963 964 /* NOT REACHED */ 965 return (EXIT_FAILURE); 966} 967