1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012-2014 Baptiste Daroussin <[email protected]>
5 * Copyright (c) 2013 Bryan Drewery <[email protected]>
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 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/queue.h>
35 #include <sys/types.h>
36 #include <sys/sbuf.h>
37 #include <sys/wait.h>
38
39 #include <archive.h>
40 #include <archive_entry.h>
41 #include <dirent.h>
42 #include <err.h>
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <fetch.h>
46 #include <paths.h>
47 #include <stdbool.h>
48 #include <stdlib.h>
49 #include <stdio.h>
50 #include <string.h>
51 #include <unistd.h>
52 #include <ucl.h>
53
54 #include <openssl/err.h>
55 #include <openssl/ssl.h>
56
57 #include "dns_utils.h"
58 #include "config.h"
59
60 struct sig_cert {
61 char *name;
62 unsigned char *sig;
63 int siglen;
64 unsigned char *cert;
65 int certlen;
66 bool trusted;
67 };
68
69 struct pubkey {
70 unsigned char *sig;
71 int siglen;
72 };
73
74 typedef enum {
75 HASH_UNKNOWN,
76 HASH_SHA256,
77 } hash_t;
78
79 struct fingerprint {
80 hash_t type;
81 char *name;
82 char hash[BUFSIZ];
83 STAILQ_ENTRY(fingerprint) next;
84 };
85
86 STAILQ_HEAD(fingerprint_list, fingerprint);
87
88 static int
extract_pkg_static(int fd,char * p,int sz)89 extract_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
137 cleanup:
138 archive_read_free(a);
139 return (ret);
140
141 }
142
143 static int
install_pkg_static(const char * path,const char * pkgpath,bool force)144 install_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
175 static int
fetch_to_fd(const char * url,char * path)176 fetch_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 ssize_t r;
186 char buf[10240];
187 char zone[MAXHOSTNAMELEN + 13];
188 static const char *mirror_type = NULL;
189
190 max_retry = 3;
191 current = mirrors = NULL;
192 remote = NULL;
193
194 if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type)
195 != 0) {
196 warnx("No MIRROR_TYPE defined");
197 return (-1);
198 }
199
200 if ((fd = mkstemp(path)) == -1) {
201 warn("mkstemp()");
202 return (-1);
203 }
204
205 retry = max_retry;
206
207 if ((u = fetchParseURL(url)) == NULL) {
208 warn("fetchParseURL('%s')", url);
209 return (-1);
210 }
211
212 while (remote == NULL) {
213 if (retry == max_retry) {
214 if (strcmp(u->scheme, "file") != 0 &&
215 strcasecmp(mirror_type, "srv") == 0) {
216 snprintf(zone, sizeof(zone),
217 "_%s._tcp.%s", u->scheme, u->host);
218 mirrors = dns_getsrvinfo(zone);
219 current = mirrors;
220 }
221 }
222
223 if (mirrors != NULL) {
224 strlcpy(u->host, current->host, sizeof(u->host));
225 u->port = current->port;
226 }
227
228 remote = fetchXGet(u, &st, "");
229 if (remote == NULL) {
230 --retry;
231 if (retry <= 0)
232 goto fetchfail;
233 if (mirrors == NULL) {
234 sleep(1);
235 } else {
236 current = current->next;
237 if (current == NULL)
238 current = mirrors;
239 }
240 }
241 }
242
243 while ((r = fread(buf, 1, sizeof(buf), remote)) > 0) {
244 if (write(fd, buf, r) != r) {
245 warn("write()");
246 goto fetchfail;
247 }
248 }
249
250 if (r != 0) {
251 warn("An error occurred while fetching pkg(8)");
252 goto fetchfail;
253 }
254
255 if (ferror(remote))
256 goto fetchfail;
257
258 goto cleanup;
259
260 fetchfail:
261 if (fd != -1) {
262 close(fd);
263 fd = -1;
264 unlink(path);
265 }
266
267 cleanup:
268 if (remote != NULL)
269 fclose(remote);
270
271 return fd;
272 }
273
274 static struct fingerprint *
parse_fingerprint(ucl_object_t * obj)275 parse_fingerprint(ucl_object_t *obj)
276 {
277 const ucl_object_t *cur;
278 ucl_object_iter_t it = NULL;
279 const char *function, *fp, *key;
280 struct fingerprint *f;
281 hash_t fct = HASH_UNKNOWN;
282
283 function = fp = NULL;
284
285 while ((cur = ucl_iterate_object(obj, &it, true))) {
286 key = ucl_object_key(cur);
287 if (cur->type != UCL_STRING)
288 continue;
289 if (strcasecmp(key, "function") == 0) {
290 function = ucl_object_tostring(cur);
291 continue;
292 }
293 if (strcasecmp(key, "fingerprint") == 0) {
294 fp = ucl_object_tostring(cur);
295 continue;
296 }
297 }
298
299 if (fp == NULL || function == NULL)
300 return (NULL);
301
302 if (strcasecmp(function, "sha256") == 0)
303 fct = HASH_SHA256;
304
305 if (fct == HASH_UNKNOWN) {
306 warnx("Unsupported hashing function: %s", function);
307 return (NULL);
308 }
309
310 f = calloc(1, sizeof(struct fingerprint));
311 f->type = fct;
312 strlcpy(f->hash, fp, sizeof(f->hash));
313
314 return (f);
315 }
316
317 static void
free_fingerprint_list(struct fingerprint_list * list)318 free_fingerprint_list(struct fingerprint_list* list)
319 {
320 struct fingerprint *fingerprint, *tmp;
321
322 STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) {
323 free(fingerprint->name);
324 free(fingerprint);
325 }
326 free(list);
327 }
328
329 static struct fingerprint *
load_fingerprint(const char * dir,const char * filename)330 load_fingerprint(const char *dir, const char *filename)
331 {
332 ucl_object_t *obj = NULL;
333 struct ucl_parser *p = NULL;
334 struct fingerprint *f;
335 char path[MAXPATHLEN];
336
337 f = NULL;
338
339 snprintf(path, MAXPATHLEN, "%s/%s", dir, filename);
340
341 p = ucl_parser_new(0);
342 if (!ucl_parser_add_file(p, path)) {
343 warnx("%s: %s", path, ucl_parser_get_error(p));
344 ucl_parser_free(p);
345 return (NULL);
346 }
347
348 obj = ucl_parser_get_object(p);
349
350 if (obj->type == UCL_OBJECT)
351 f = parse_fingerprint(obj);
352
353 if (f != NULL)
354 f->name = strdup(filename);
355
356 ucl_object_unref(obj);
357 ucl_parser_free(p);
358
359 return (f);
360 }
361
362 static struct fingerprint_list *
load_fingerprints(const char * path,int * count)363 load_fingerprints(const char *path, int *count)
364 {
365 DIR *d;
366 struct dirent *ent;
367 struct fingerprint *finger;
368 struct fingerprint_list *fingerprints;
369
370 *count = 0;
371
372 fingerprints = calloc(1, sizeof(struct fingerprint_list));
373 if (fingerprints == NULL)
374 return (NULL);
375 STAILQ_INIT(fingerprints);
376
377 if ((d = opendir(path)) == NULL) {
378 free(fingerprints);
379
380 return (NULL);
381 }
382
383 while ((ent = readdir(d))) {
384 if (strcmp(ent->d_name, ".") == 0 ||
385 strcmp(ent->d_name, "..") == 0)
386 continue;
387 finger = load_fingerprint(path, ent->d_name);
388 if (finger != NULL) {
389 STAILQ_INSERT_TAIL(fingerprints, finger, next);
390 ++(*count);
391 }
392 }
393
394 closedir(d);
395
396 return (fingerprints);
397 }
398
399 static void
sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],char out[SHA256_DIGEST_LENGTH * 2+1])400 sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],
401 char out[SHA256_DIGEST_LENGTH * 2 + 1])
402 {
403 int i;
404
405 for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
406 sprintf(out + (i * 2), "%02x", hash[i]);
407
408 out[SHA256_DIGEST_LENGTH * 2] = '\0';
409 }
410
411 static void
sha256_buf(char * buf,size_t len,char out[SHA256_DIGEST_LENGTH * 2+1])412 sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1])
413 {
414 unsigned char hash[SHA256_DIGEST_LENGTH];
415 SHA256_CTX sha256;
416
417 out[0] = '\0';
418
419 SHA256_Init(&sha256);
420 SHA256_Update(&sha256, buf, len);
421 SHA256_Final(hash, &sha256);
422 sha256_hash(hash, out);
423 }
424
425 static int
sha256_fd(int fd,char out[SHA256_DIGEST_LENGTH * 2+1])426 sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1])
427 {
428 int my_fd;
429 FILE *fp;
430 char buffer[BUFSIZ];
431 unsigned char hash[SHA256_DIGEST_LENGTH];
432 size_t r;
433 int ret;
434 SHA256_CTX sha256;
435
436 my_fd = -1;
437 fp = NULL;
438 r = 0;
439 ret = 1;
440
441 out[0] = '\0';
442
443 /* Duplicate the fd so that fclose(3) does not close it. */
444 if ((my_fd = dup(fd)) == -1) {
445 warnx("dup");
446 goto cleanup;
447 }
448
449 if ((fp = fdopen(my_fd, "rb")) == NULL) {
450 warnx("fdopen");
451 goto cleanup;
452 }
453
454 SHA256_Init(&sha256);
455
456 while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0)
457 SHA256_Update(&sha256, buffer, r);
458
459 if (ferror(fp) != 0) {
460 warnx("fread");
461 goto cleanup;
462 }
463
464 SHA256_Final(hash, &sha256);
465 sha256_hash(hash, out);
466 ret = 0;
467
468 cleanup:
469 if (fp != NULL)
470 fclose(fp);
471 else if (my_fd != -1)
472 close(my_fd);
473 (void)lseek(fd, 0, SEEK_SET);
474
475 return (ret);
476 }
477
478 static EVP_PKEY *
load_public_key_file(const char * file)479 load_public_key_file(const char *file)
480 {
481 EVP_PKEY *pkey;
482 BIO *bp;
483 char errbuf[1024];
484
485 bp = BIO_new_file(file, "r");
486 if (!bp)
487 errx(EXIT_FAILURE, "Unable to read %s", file);
488
489 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
490 warnx("ici: %s", ERR_error_string(ERR_get_error(), errbuf));
491
492 BIO_free(bp);
493
494 return (pkey);
495 }
496
497 static EVP_PKEY *
load_public_key_buf(const unsigned char * cert,int certlen)498 load_public_key_buf(const unsigned char *cert, int certlen)
499 {
500 EVP_PKEY *pkey;
501 BIO *bp;
502 char errbuf[1024];
503
504 bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen);
505
506 if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
507 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
508
509 BIO_free(bp);
510
511 return (pkey);
512 }
513
514 static bool
rsa_verify_cert(int fd,const char * sigfile,const unsigned char * key,int keylen,unsigned char * sig,int siglen)515 rsa_verify_cert(int fd, const char *sigfile, const unsigned char *key,
516 int keylen, unsigned char *sig, int siglen)
517 {
518 EVP_MD_CTX *mdctx;
519 EVP_PKEY *pkey;
520 char sha256[(SHA256_DIGEST_LENGTH * 2) + 2];
521 char errbuf[1024];
522 bool ret;
523
524 pkey = NULL;
525 mdctx = NULL;
526 ret = false;
527
528 SSL_load_error_strings();
529
530 /* Compute SHA256 of the package. */
531 if (lseek(fd, 0, 0) == -1) {
532 warn("lseek");
533 goto cleanup;
534 }
535 if ((sha256_fd(fd, sha256)) == -1) {
536 warnx("Error creating SHA256 hash for package");
537 goto cleanup;
538 }
539
540 if (sigfile != NULL) {
541 if ((pkey = load_public_key_file(sigfile)) == NULL) {
542 warnx("Error reading public key");
543 goto cleanup;
544 }
545 } else {
546 if ((pkey = load_public_key_buf(key, keylen)) == NULL) {
547 warnx("Error reading public key");
548 goto cleanup;
549 }
550 }
551
552 /* Verify signature of the SHA256(pkg) is valid. */
553 if ((mdctx = EVP_MD_CTX_create()) == NULL) {
554 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
555 goto error;
556 }
557
558 if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) {
559 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
560 goto error;
561 }
562 if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) {
563 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
564 goto error;
565 }
566
567 if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) {
568 warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
569 goto error;
570 }
571
572 ret = true;
573 printf("done\n");
574 goto cleanup;
575
576 error:
577 printf("failed\n");
578
579 cleanup:
580 if (pkey)
581 EVP_PKEY_free(pkey);
582 if (mdctx)
583 EVP_MD_CTX_destroy(mdctx);
584 ERR_free_strings();
585
586 return (ret);
587 }
588
589 static struct pubkey *
read_pubkey(int fd)590 read_pubkey(int fd)
591 {
592 struct pubkey *pk;
593 struct sbuf *sig;
594 char buf[4096];
595 int r;
596
597 if (lseek(fd, 0, 0) == -1) {
598 warn("lseek");
599 return (NULL);
600 }
601
602 sig = sbuf_new_auto();
603
604 while ((r = read(fd, buf, sizeof(buf))) >0) {
605 sbuf_bcat(sig, buf, r);
606 }
607
608 sbuf_finish(sig);
609 pk = calloc(1, sizeof(struct pubkey));
610 pk->siglen = sbuf_len(sig);
611 pk->sig = calloc(1, pk->siglen);
612 memcpy(pk->sig, sbuf_data(sig), pk->siglen);
613 sbuf_delete(sig);
614
615 return (pk);
616 }
617
618 static struct sig_cert *
parse_cert(int fd)619 parse_cert(int fd) {
620 int my_fd;
621 struct sig_cert *sc;
622 FILE *fp;
623 struct sbuf *buf, *sig, *cert;
624 char *line;
625 size_t linecap;
626 ssize_t linelen;
627
628 buf = NULL;
629 my_fd = -1;
630 sc = NULL;
631 line = NULL;
632 linecap = 0;
633
634 if (lseek(fd, 0, 0) == -1) {
635 warn("lseek");
636 return (NULL);
637 }
638
639 /* Duplicate the fd so that fclose(3) does not close it. */
640 if ((my_fd = dup(fd)) == -1) {
641 warnx("dup");
642 return (NULL);
643 }
644
645 if ((fp = fdopen(my_fd, "rb")) == NULL) {
646 warn("fdopen");
647 close(my_fd);
648 return (NULL);
649 }
650
651 sig = sbuf_new_auto();
652 cert = sbuf_new_auto();
653
654 while ((linelen = getline(&line, &linecap, fp)) > 0) {
655 if (strcmp(line, "SIGNATURE\n") == 0) {
656 buf = sig;
657 continue;
658 } else if (strcmp(line, "CERT\n") == 0) {
659 buf = cert;
660 continue;
661 } else if (strcmp(line, "END\n") == 0) {
662 break;
663 }
664 if (buf != NULL)
665 sbuf_bcat(buf, line, linelen);
666 }
667
668 fclose(fp);
669
670 /* Trim out unrelated trailing newline */
671 sbuf_setpos(sig, sbuf_len(sig) - 1);
672
673 sbuf_finish(sig);
674 sbuf_finish(cert);
675
676 sc = calloc(1, sizeof(struct sig_cert));
677 sc->siglen = sbuf_len(sig);
678 sc->sig = calloc(1, sc->siglen);
679 memcpy(sc->sig, sbuf_data(sig), sc->siglen);
680
681 sc->certlen = sbuf_len(cert);
682 sc->cert = strdup(sbuf_data(cert));
683
684 sbuf_delete(sig);
685 sbuf_delete(cert);
686
687 return (sc);
688 }
689
690 static bool
verify_pubsignature(int fd_pkg,int fd_sig)691 verify_pubsignature(int fd_pkg, int fd_sig)
692 {
693 struct pubkey *pk;
694 const char *pubkey;
695 bool ret;
696
697 pk = NULL;
698 pubkey = NULL;
699 ret = false;
700 if (config_string(PUBKEY, &pubkey) != 0) {
701 warnx("No CONFIG_PUBKEY defined");
702 goto cleanup;
703 }
704
705 if ((pk = read_pubkey(fd_sig)) == NULL) {
706 warnx("Error reading signature");
707 goto cleanup;
708 }
709
710 /* Verify the signature. */
711 printf("Verifying signature with public key %s... ", pubkey);
712 if (rsa_verify_cert(fd_pkg, pubkey, NULL, 0, pk->sig,
713 pk->siglen) == false) {
714 fprintf(stderr, "Signature is not valid\n");
715 goto cleanup;
716 }
717
718 ret = true;
719
720 cleanup:
721 if (pk) {
722 free(pk->sig);
723 free(pk);
724 }
725
726 return (ret);
727 }
728
729 static bool
verify_signature(int fd_pkg,int fd_sig)730 verify_signature(int fd_pkg, int fd_sig)
731 {
732 struct fingerprint_list *trusted, *revoked;
733 struct fingerprint *fingerprint;
734 struct sig_cert *sc;
735 bool ret;
736 int trusted_count, revoked_count;
737 const char *fingerprints;
738 char path[MAXPATHLEN];
739 char hash[SHA256_DIGEST_LENGTH * 2 + 1];
740
741 sc = NULL;
742 trusted = revoked = NULL;
743 ret = false;
744
745 /* Read and parse fingerprints. */
746 if (config_string(FINGERPRINTS, &fingerprints) != 0) {
747 warnx("No CONFIG_FINGERPRINTS defined");
748 goto cleanup;
749 }
750
751 snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints);
752 if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) {
753 warnx("Error loading trusted certificates");
754 goto cleanup;
755 }
756
757 if (trusted_count == 0 || trusted == NULL) {
758 fprintf(stderr, "No trusted certificates found.\n");
759 goto cleanup;
760 }
761
762 snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints);
763 if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) {
764 warnx("Error loading revoked certificates");
765 goto cleanup;
766 }
767
768 /* Read certificate and signature in. */
769 if ((sc = parse_cert(fd_sig)) == NULL) {
770 warnx("Error parsing certificate");
771 goto cleanup;
772 }
773 /* Explicitly mark as non-trusted until proven otherwise. */
774 sc->trusted = false;
775
776 /* Parse signature and pubkey out of the certificate */
777 sha256_buf(sc->cert, sc->certlen, hash);
778
779 /* Check if this hash is revoked */
780 if (revoked != NULL) {
781 STAILQ_FOREACH(fingerprint, revoked, next) {
782 if (strcasecmp(fingerprint->hash, hash) == 0) {
783 fprintf(stderr, "The package was signed with "
784 "revoked certificate %s\n",
785 fingerprint->name);
786 goto cleanup;
787 }
788 }
789 }
790
791 STAILQ_FOREACH(fingerprint, trusted, next) {
792 if (strcasecmp(fingerprint->hash, hash) == 0) {
793 sc->trusted = true;
794 sc->name = strdup(fingerprint->name);
795 break;
796 }
797 }
798
799 if (sc->trusted == false) {
800 fprintf(stderr, "No trusted fingerprint found matching "
801 "package's certificate\n");
802 goto cleanup;
803 }
804
805 /* Verify the signature. */
806 printf("Verifying signature with trusted certificate %s... ", sc->name);
807 if (rsa_verify_cert(fd_pkg, NULL, sc->cert, sc->certlen, sc->sig,
808 sc->siglen) == false) {
809 fprintf(stderr, "Signature is not valid\n");
810 goto cleanup;
811 }
812
813 ret = true;
814
815 cleanup:
816 if (trusted)
817 free_fingerprint_list(trusted);
818 if (revoked)
819 free_fingerprint_list(revoked);
820 if (sc) {
821 free(sc->cert);
822 free(sc->sig);
823 free(sc->name);
824 free(sc);
825 }
826
827 return (ret);
828 }
829
830 static int
bootstrap_pkg(bool force)831 bootstrap_pkg(bool force)
832 {
833 int fd_pkg, fd_sig;
834 int ret;
835 char url[MAXPATHLEN];
836 char tmppkg[MAXPATHLEN];
837 char tmpsig[MAXPATHLEN];
838 const char *packagesite;
839 const char *signature_type;
840 char pkgstatic[MAXPATHLEN];
841
842 fd_sig = -1;
843 ret = -1;
844
845 if (config_string(PACKAGESITE, &packagesite) != 0) {
846 warnx("No PACKAGESITE defined");
847 return (-1);
848 }
849
850 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
851 warnx("Error looking up SIGNATURE_TYPE");
852 return (-1);
853 }
854
855 printf("Bootstrapping pkg from %s, please wait...\n", packagesite);
856
857 /* Support pkg+http:// for PACKAGESITE which is the new format
858 in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has
859 no A record. */
860 if (strncmp(URL_SCHEME_PREFIX, packagesite,
861 strlen(URL_SCHEME_PREFIX)) == 0)
862 packagesite += strlen(URL_SCHEME_PREFIX);
863 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite);
864
865 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX",
866 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
867
868 if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1)
869 goto fetchfail;
870
871 if (signature_type != NULL &&
872 strcasecmp(signature_type, "NONE") != 0) {
873 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
874
875 snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX",
876 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
877 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig",
878 packagesite);
879
880 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) {
881 fprintf(stderr, "Signature for pkg not "
882 "available.\n");
883 goto fetchfail;
884 }
885
886 if (verify_signature(fd_pkg, fd_sig) == false)
887 goto cleanup;
888 } else if (strcasecmp(signature_type, "PUBKEY") == 0) {
889
890 snprintf(tmpsig, MAXPATHLEN,
891 "%s/pkg.txz.pubkeysig.XXXXXX",
892 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
893 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.pubkeysig",
894 packagesite);
895
896 if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) {
897 fprintf(stderr, "Signature for pkg not "
898 "available.\n");
899 goto fetchfail;
900 }
901
902 if (verify_pubsignature(fd_pkg, fd_sig) == false)
903 goto cleanup;
904 } else {
905 warnx("Signature type %s is not supported for "
906 "bootstrapping.", signature_type);
907 goto cleanup;
908 }
909 }
910
911 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
912 ret = install_pkg_static(pkgstatic, tmppkg, force);
913
914 goto cleanup;
915
916 fetchfail:
917 warnx("Error fetching %s: %s", url, fetchLastErrString);
918 fprintf(stderr, "A pre-built version of pkg could not be found for "
919 "your system.\n");
920 fprintf(stderr, "Consider changing PACKAGESITE or installing it from "
921 "ports: 'ports-mgmt/pkg'.\n");
922
923 cleanup:
924 if (fd_sig != -1) {
925 close(fd_sig);
926 unlink(tmpsig);
927 }
928
929 if (fd_pkg != -1) {
930 close(fd_pkg);
931 unlink(tmppkg);
932 }
933
934 return (ret);
935 }
936
937 static const char confirmation_message[] =
938 "The package management tool is not yet installed on your system.\n"
939 "Do you want to fetch and install it now? [y/N]: ";
940
941 static const char non_interactive_message[] =
942 "The package management tool is not yet installed on your system.\n"
943 "Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap "
944 "in non-interactive (stdin not being a tty)\n";
945
946 static int
pkg_query_yes_no(void)947 pkg_query_yes_no(void)
948 {
949 int ret, c;
950
951 fflush(stdout);
952 c = getchar();
953
954 if (c == 'y' || c == 'Y')
955 ret = 1;
956 else
957 ret = 0;
958
959 while (c != '\n' && c != EOF)
960 c = getchar();
961
962 return (ret);
963 }
964
965 static int
bootstrap_pkg_local(const char * pkgpath,bool force)966 bootstrap_pkg_local(const char *pkgpath, bool force)
967 {
968 char path[MAXPATHLEN];
969 char pkgstatic[MAXPATHLEN];
970 const char *signature_type;
971 int fd_pkg, fd_sig, ret;
972
973 fd_sig = -1;
974 ret = -1;
975
976 fd_pkg = open(pkgpath, O_RDONLY);
977 if (fd_pkg == -1)
978 err(EXIT_FAILURE, "Unable to open %s", pkgpath);
979
980 if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
981 warnx("Error looking up SIGNATURE_TYPE");
982 goto cleanup;
983 }
984 if (signature_type != NULL &&
985 strcasecmp(signature_type, "NONE") != 0) {
986 if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
987
988 snprintf(path, sizeof(path), "%s.sig", pkgpath);
989
990 if ((fd_sig = open(path, O_RDONLY)) == -1) {
991 fprintf(stderr, "Signature for pkg not "
992 "available.\n");
993 goto cleanup;
994 }
995
996 if (verify_signature(fd_pkg, fd_sig) == false)
997 goto cleanup;
998
999 } else if (strcasecmp(signature_type, "PUBKEY") == 0) {
1000
1001 snprintf(path, sizeof(path), "%s.pubkeysig", pkgpath);
1002
1003 if ((fd_sig = open(path, O_RDONLY)) == -1) {
1004 fprintf(stderr, "Signature for pkg not "
1005 "available.\n");
1006 goto cleanup;
1007 }
1008
1009 if (verify_pubsignature(fd_pkg, fd_sig) == false)
1010 goto cleanup;
1011
1012 } else {
1013 warnx("Signature type %s is not supported for "
1014 "bootstrapping.", signature_type);
1015 goto cleanup;
1016 }
1017 }
1018
1019 if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
1020 ret = install_pkg_static(pkgstatic, pkgpath, force);
1021
1022 cleanup:
1023 close(fd_pkg);
1024 if (fd_sig != -1)
1025 close(fd_sig);
1026
1027 return (ret);
1028 }
1029
1030 int
main(int argc,char * argv[])1031 main(int argc, char *argv[])
1032 {
1033 char pkgpath[MAXPATHLEN];
1034 const char *pkgarg;
1035 int i;
1036 bool bootstrap_only, force, yes;
1037
1038 bootstrap_only = false;
1039 force = false;
1040 pkgarg = NULL;
1041 yes = false;
1042
1043 snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg",
1044 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE);
1045
1046 if (argc > 1 && strcmp(argv[1], "bootstrap") == 0) {
1047 bootstrap_only = true;
1048 if (argc == 3 && strcmp(argv[2], "-f") == 0)
1049 force = true;
1050 }
1051
1052 if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) {
1053 /*
1054 * To allow 'pkg -N' to be used as a reliable test for whether
1055 * a system is configured to use pkg, don't bootstrap pkg
1056 * when that argument is given as argv[1].
1057 */
1058 if (argv[1] != NULL && strcmp(argv[1], "-N") == 0)
1059 errx(EXIT_FAILURE, "pkg is not installed");
1060
1061 config_init();
1062
1063 if (argc > 1 && strcmp(argv[1], "add") == 0) {
1064 if (argc > 2 && strcmp(argv[2], "-f") == 0) {
1065 force = true;
1066 pkgarg = argv[3];
1067 } else
1068 pkgarg = argv[2];
1069 if (pkgarg == NULL) {
1070 fprintf(stderr, "Path to pkg.txz required\n");
1071 exit(EXIT_FAILURE);
1072 }
1073 if (access(pkgarg, R_OK) == -1) {
1074 fprintf(stderr, "No such file: %s\n", pkgarg);
1075 exit(EXIT_FAILURE);
1076 }
1077 if (bootstrap_pkg_local(pkgarg, force) != 0)
1078 exit(EXIT_FAILURE);
1079 exit(EXIT_SUCCESS);
1080 }
1081 /*
1082 * Do not ask for confirmation if either of stdin or stdout is
1083 * not tty. Check the environment to see if user has answer
1084 * tucked in there already.
1085 */
1086 config_bool(ASSUME_ALWAYS_YES, &yes);
1087 if (!yes) {
1088 for (i = 1; i < argc; i++) {
1089 if (strcmp(argv[i], "-y") == 0 ||
1090 strcmp(argv[i], "--yes") == 0) {
1091 yes = true;
1092 break;
1093 }
1094 }
1095 }
1096 if (!yes) {
1097 if (!isatty(fileno(stdin))) {
1098 fprintf(stderr, non_interactive_message);
1099 exit(EXIT_FAILURE);
1100 }
1101
1102 printf("%s", confirmation_message);
1103 if (pkg_query_yes_no() == 0)
1104 exit(EXIT_FAILURE);
1105 }
1106 if (bootstrap_pkg(force) != 0)
1107 exit(EXIT_FAILURE);
1108 config_finish();
1109
1110 if (bootstrap_only)
1111 exit(EXIT_SUCCESS);
1112 } else if (bootstrap_only) {
1113 printf("pkg already bootstrapped at %s\n", pkgpath);
1114 exit(EXIT_SUCCESS);
1115 }
1116
1117 execv(pkgpath, argv);
1118
1119 /* NOT REACHED */
1120 return (EXIT_FAILURE);
1121 }
1122