Switch C compiler to the generic 'cc' (to use the default compiler, not necessarily...
[BearSSL] / tools / client.c
1 /*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdint.h>
29 #include <errno.h>
30 #include <signal.h>
31
32 #ifdef _WIN32
33 #include <winsock2.h>
34 #include <ws2tcpip.h>
35 #else
36 #include <sys/types.h>
37 #include <sys/socket.h>
38 #include <netdb.h>
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
41 #include <unistd.h>
42 #include <fcntl.h>
43
44 #define SOCKET int
45 #define INVALID_SOCKET (-1)
46 #endif
47
48 #include "brssl.h"
49
50 static int
51 host_connect(const char *host, const char *port, int verbose)
52 {
53 struct addrinfo hints, *si, *p;
54 SOCKET fd;
55 int err;
56
57 memset(&hints, 0, sizeof hints);
58 hints.ai_family = PF_UNSPEC;
59 hints.ai_socktype = SOCK_STREAM;
60 err = getaddrinfo(host, port, &hints, &si);
61 if (err != 0) {
62 fprintf(stderr, "ERROR: getaddrinfo(): %s\n",
63 gai_strerror(err));
64 return INVALID_SOCKET;
65 }
66 fd = INVALID_SOCKET;
67 for (p = si; p != NULL; p = p->ai_next) {
68 if (verbose) {
69 struct sockaddr *sa;
70 void *addr;
71 char tmp[INET6_ADDRSTRLEN + 50];
72
73 sa = (struct sockaddr *)p->ai_addr;
74 if (sa->sa_family == AF_INET) {
75 addr = &((struct sockaddr_in *)
76 (void *)sa)->sin_addr;
77 } else if (sa->sa_family == AF_INET6) {
78 addr = &((struct sockaddr_in6 *)
79 (void *)sa)->sin6_addr;
80 } else {
81 addr = NULL;
82 }
83 if (addr != NULL) {
84 if (!inet_ntop(p->ai_family, addr,
85 tmp, sizeof tmp))
86 {
87 strcpy(tmp, "<invalid>");
88 }
89 } else {
90 sprintf(tmp, "<unknown family: %d>",
91 (int)sa->sa_family);
92 }
93 fprintf(stderr, "connecting to: %s\n", tmp);
94 }
95 fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
96 if (fd == INVALID_SOCKET) {
97 if (verbose) {
98 perror("socket()");
99 }
100 continue;
101 }
102 if (connect(fd, p->ai_addr, p->ai_addrlen) == INVALID_SOCKET) {
103 if (verbose) {
104 perror("connect()");
105 }
106 #ifdef _WIN32
107 closesocket(fd);
108 #else
109 close(fd);
110 #endif
111 continue;
112 }
113 break;
114 }
115 if (p == NULL) {
116 freeaddrinfo(si);
117 fprintf(stderr, "ERROR: failed to connect\n");
118 return INVALID_SOCKET;
119 }
120 freeaddrinfo(si);
121 if (verbose) {
122 fprintf(stderr, "connected.\n");
123 }
124
125 /*
126 * We make the socket non-blocking, since we are going to use
127 * poll() or select() to organise I/O.
128 */
129 #ifdef _WIN32
130 {
131 u_long arg;
132
133 arg = 1;
134 ioctlsocket(fd, FIONBIO, &arg);
135 }
136 #else
137 fcntl(fd, F_SETFL, O_NONBLOCK);
138 #endif
139 return fd;
140 }
141
142 typedef struct {
143 const br_ssl_client_certificate_class *vtable;
144 int verbose;
145 br_x509_certificate *chain;
146 size_t chain_len;
147 private_key *sk;
148 int issuer_key_type;
149 } ccert_context;
150
151 static void
152 cc_start_name_list(const br_ssl_client_certificate_class **pctx)
153 {
154 ccert_context *zc;
155
156 zc = (ccert_context *)pctx;
157 if (zc->verbose) {
158 fprintf(stderr, "Server requests a client certificate.\n");
159 fprintf(stderr, "--- anchor DN list start ---\n");
160 }
161 }
162
163 static void
164 cc_start_name(const br_ssl_client_certificate_class **pctx, size_t len)
165 {
166 ccert_context *zc;
167
168 zc = (ccert_context *)pctx;
169 if (zc->verbose) {
170 fprintf(stderr, "new anchor name, length = %u\n",
171 (unsigned)len);
172 }
173 }
174
175 static void
176 cc_append_name(const br_ssl_client_certificate_class **pctx,
177 const unsigned char *data, size_t len)
178 {
179 ccert_context *zc;
180
181 zc = (ccert_context *)pctx;
182 if (zc->verbose) {
183 size_t u;
184
185 for (u = 0; u < len; u ++) {
186 if (u == 0) {
187 fprintf(stderr, " ");
188 } else if (u > 0 && u % 16 == 0) {
189 fprintf(stderr, "\n ");
190 }
191 fprintf(stderr, " %02x", data[u]);
192 }
193 if (len > 0) {
194 fprintf(stderr, "\n");
195 }
196 }
197 }
198
199 static void
200 cc_end_name(const br_ssl_client_certificate_class **pctx)
201 {
202 (void)pctx;
203 }
204
205 static void
206 cc_end_name_list(const br_ssl_client_certificate_class **pctx)
207 {
208 ccert_context *zc;
209
210 zc = (ccert_context *)pctx;
211 if (zc->verbose) {
212 fprintf(stderr, "--- anchor DN list end ---\n");
213 }
214 }
215
216 static void
217 print_hashes(unsigned hh, unsigned hh2)
218 {
219 int i;
220
221 for (i = 0; i < 8; i ++) {
222 const char *name;
223
224 name = hash_function_name(i);
225 if (((hh >> i) & 1) != 0) {
226 fprintf(stderr, " %s", name);
227 } else if (((hh2 >> i) & 1) != 0) {
228 fprintf(stderr, " (%s)", name);
229 }
230 }
231 }
232
233 static int
234 choose_hash(unsigned hh)
235 {
236 static const int f[] = {
237 br_sha256_ID, br_sha224_ID, br_sha384_ID, br_sha512_ID,
238 br_sha1_ID, br_md5sha1_ID, -1
239 };
240
241 size_t u;
242
243 for (u = 0; f[u] >= 0; u ++) {
244 if (((hh >> f[u]) & 1) != 0) {
245 return f[u];
246 }
247 }
248 return -1;
249 }
250
251 static void
252 cc_choose(const br_ssl_client_certificate_class **pctx,
253 const br_ssl_client_context *cc, uint32_t auth_types,
254 br_ssl_client_certificate *choices)
255 {
256 ccert_context *zc;
257 int scurve;
258
259 zc = (ccert_context *)pctx;
260 scurve = br_ssl_client_get_server_curve(cc);
261 if (zc->verbose) {
262 unsigned hashes;
263
264 hashes = br_ssl_client_get_server_hashes(cc);
265 if ((auth_types & 0x00FF) != 0) {
266 fprintf(stderr, "supported: RSA signatures:");
267 print_hashes(auth_types, hashes);
268 fprintf(stderr, "\n");
269 }
270 if ((auth_types & 0xFF00) != 0) {
271 fprintf(stderr, "supported: ECDSA signatures:");
272 print_hashes(auth_types >> 8, hashes >> 8);
273 fprintf(stderr, "\n");
274 }
275 if ((auth_types & 0x010000) != 0) {
276 fprintf(stderr, "supported:"
277 " fixed ECDH (cert signed with RSA)\n");
278 }
279 if ((auth_types & 0x020000) != 0) {
280 fprintf(stderr, "supported:"
281 " fixed ECDH (cert signed with ECDSA)\n");
282 }
283 if (scurve) {
284 fprintf(stderr, "server key curve: %s (%d)\n",
285 ec_curve_name(scurve), scurve);
286 } else {
287 fprintf(stderr, "server key is not EC\n");
288 }
289 }
290 switch (zc->sk->key_type) {
291 case BR_KEYTYPE_RSA:
292 if ((choices->hash_id = choose_hash(auth_types)) >= 0) {
293 if (zc->verbose) {
294 fprintf(stderr, "using RSA, hash = %d (%s)\n",
295 choices->hash_id,
296 hash_function_name(choices->hash_id));
297 }
298 choices->auth_type = BR_AUTH_RSA;
299 choices->chain = zc->chain;
300 choices->chain_len = zc->chain_len;
301 return;
302 }
303 break;
304 case BR_KEYTYPE_EC:
305 if (zc->issuer_key_type != 0
306 && scurve == zc->sk->key.ec.curve)
307 {
308 int x;
309
310 x = (zc->issuer_key_type == BR_KEYTYPE_RSA) ? 16 : 17;
311 if (((auth_types >> x) & 1) != 0) {
312 if (zc->verbose) {
313 fprintf(stderr, "using static ECDH\n");
314 }
315 choices->auth_type = BR_AUTH_ECDH;
316 choices->hash_id = -1;
317 choices->chain = zc->chain;
318 choices->chain_len = zc->chain_len;
319 return;
320 }
321 }
322 if ((choices->hash_id = choose_hash(auth_types >> 8)) >= 0) {
323 if (zc->verbose) {
324 fprintf(stderr, "using ECDSA, hash = %d (%s)\n",
325 choices->hash_id,
326 hash_function_name(choices->hash_id));
327 }
328 choices->auth_type = BR_AUTH_ECDSA;
329 choices->chain = zc->chain;
330 choices->chain_len = zc->chain_len;
331 return;
332 }
333 break;
334 }
335 if (zc->verbose) {
336 fprintf(stderr, "no matching client certificate\n");
337 }
338 choices->chain = NULL;
339 choices->chain_len = 0;
340 }
341
342 static uint32_t
343 cc_do_keyx(const br_ssl_client_certificate_class **pctx,
344 unsigned char *data, size_t *len)
345 {
346 const br_ec_impl *iec;
347 ccert_context *zc;
348 size_t xoff, xlen;
349 uint32_t r;
350
351 zc = (ccert_context *)pctx;
352 iec = br_ec_get_default();
353 r = iec->mul(data, *len, zc->sk->key.ec.x,
354 zc->sk->key.ec.xlen, zc->sk->key.ec.curve);
355 xoff = iec->xoff(zc->sk->key.ec.curve, &xlen);
356 memmove(data, data + xoff, xlen);
357 *len = xlen;
358 return r;
359 }
360
361 static size_t
362 cc_do_sign(const br_ssl_client_certificate_class **pctx,
363 int hash_id, size_t hv_len, unsigned char *data, size_t len)
364 {
365 ccert_context *zc;
366 unsigned char hv[64];
367
368 zc = (ccert_context *)pctx;
369 memcpy(hv, data, hv_len);
370 switch (zc->sk->key_type) {
371 const br_hash_class *hc;
372 const unsigned char *hash_oid;
373 uint32_t x;
374 size_t sig_len;
375
376 case BR_KEYTYPE_RSA:
377 hash_oid = get_hash_oid(hash_id);
378 if (hash_oid == NULL && hash_id != 0) {
379 if (zc->verbose) {
380 fprintf(stderr, "ERROR: cannot RSA-sign with"
381 " unknown hash function: %d\n",
382 hash_id);
383 }
384 return 0;
385 }
386 sig_len = (zc->sk->key.rsa.n_bitlen + 7) >> 3;
387 if (len < sig_len) {
388 if (zc->verbose) {
389 fprintf(stderr, "ERROR: cannot RSA-sign,"
390 " buffer is too small"
391 " (sig=%lu, buf=%lu)\n",
392 (unsigned long)sig_len,
393 (unsigned long)len);
394 }
395 return 0;
396 }
397 x = br_rsa_pkcs1_sign_get_default()(
398 hash_oid, hv, hv_len, &zc->sk->key.rsa, data);
399 if (!x) {
400 if (zc->verbose) {
401 fprintf(stderr, "ERROR: RSA-sign failure\n");
402 }
403 return 0;
404 }
405 return sig_len;
406
407 case BR_KEYTYPE_EC:
408 hc = get_hash_impl(hash_id);
409 if (hc == NULL) {
410 if (zc->verbose) {
411 fprintf(stderr, "ERROR: cannot ECDSA-sign with"
412 " unknown hash function: %d\n",
413 hash_id);
414 }
415 return 0;
416 }
417 if (len < 139) {
418 if (zc->verbose) {
419 fprintf(stderr, "ERROR: cannot ECDSA-sign"
420 " (output buffer = %lu)\n",
421 (unsigned long)len);
422 }
423 return 0;
424 }
425 sig_len = br_ecdsa_sign_asn1_get_default()(
426 br_ec_get_default(), hc, hv, &zc->sk->key.ec, data);
427 if (sig_len == 0) {
428 if (zc->verbose) {
429 fprintf(stderr, "ERROR: ECDSA-sign failure\n");
430 }
431 return 0;
432 }
433 return sig_len;
434
435 default:
436 return 0;
437 }
438 }
439
440 static const br_ssl_client_certificate_class ccert_vtable = {
441 sizeof(ccert_context),
442 cc_start_name_list,
443 cc_start_name,
444 cc_append_name,
445 cc_end_name,
446 cc_end_name_list,
447 cc_choose,
448 cc_do_keyx,
449 cc_do_sign
450 };
451
452 static void
453 free_alpn(void *alpn)
454 {
455 xfree(*(char **)alpn);
456 }
457
458 static void
459 usage_client(void)
460 {
461 fprintf(stderr,
462 "usage: brssl client server[:port] [ options ]\n");
463 fprintf(stderr,
464 "options:\n");
465 fprintf(stderr,
466 " -q suppress verbose messages\n");
467 fprintf(stderr,
468 " -trace activate extra debug messages (dump of all packets)\n");
469 fprintf(stderr,
470 " -sni name use this specific name for SNI\n");
471 fprintf(stderr,
472 " -nosni do not send any SNI\n");
473 fprintf(stderr,
474 " -mono use monodirectional buffering\n");
475 fprintf(stderr,
476 " -buf length set the I/O buffer length (in bytes)\n");
477 fprintf(stderr,
478 " -CA file add certificates in 'file' to trust anchors\n");
479 fprintf(stderr,
480 " -cert file set client certificate chain\n");
481 fprintf(stderr,
482 " -key file set client private key (for certificate authentication)\n");
483 fprintf(stderr,
484 " -nostaticecdh prohibit full-static ECDH (client certificate)\n");
485 fprintf(stderr,
486 " -list list supported names (protocols, algorithms...)\n");
487 fprintf(stderr,
488 " -vmin name set minimum supported version (default: TLS-1.0)\n");
489 fprintf(stderr,
490 " -vmax name set maximum supported version (default: TLS-1.2)\n");
491 fprintf(stderr,
492 " -cs names set list of supported cipher suites (comma-separated)\n");
493 fprintf(stderr,
494 " -hf names add support for some hash functions (comma-separated)\n");
495 fprintf(stderr,
496 " -minhello len set minimum ClientHello length (in bytes)\n");
497 fprintf(stderr,
498 " -fallback send the TLS_FALLBACK_SCSV (i.e. claim a downgrade)\n");
499 fprintf(stderr,
500 " -noreneg prohibit renegotiations\n");
501 fprintf(stderr,
502 " -alpn name add protocol name to list of protocols (ALPN extension)\n");
503 fprintf(stderr,
504 " -strictalpn fail on ALPN mismatch\n");
505 }
506
507 /* see brssl.h */
508 int
509 do_client(int argc, char *argv[])
510 {
511 int retcode;
512 int verbose;
513 int trace;
514 int i, bidi;
515 const char *server_name;
516 char *host;
517 char *port;
518 const char *sni;
519 anchor_list anchors = VEC_INIT;
520 unsigned vmin, vmax;
521 VECTOR(char *) alpn_names = VEC_INIT;
522 cipher_suite *suites;
523 size_t num_suites;
524 uint16_t *suite_ids;
525 unsigned hfuns;
526 size_t u;
527 br_ssl_client_context cc;
528 br_x509_minimal_context xc;
529 x509_noanchor_context xwc;
530 const br_hash_class *dnhash;
531 ccert_context zc;
532 br_x509_certificate *chain;
533 size_t chain_len;
534 private_key *sk;
535 int nostaticecdh;
536 unsigned char *iobuf;
537 size_t iobuf_len;
538 size_t minhello_len;
539 int fallback;
540 uint32_t flags;
541 SOCKET fd;
542
543 retcode = 0;
544 verbose = 1;
545 trace = 0;
546 server_name = NULL;
547 host = NULL;
548 port = NULL;
549 sni = NULL;
550 bidi = 1;
551 vmin = 0;
552 vmax = 0;
553 suites = NULL;
554 num_suites = 0;
555 hfuns = 0;
556 suite_ids = NULL;
557 chain = NULL;
558 chain_len = 0;
559 sk = NULL;
560 nostaticecdh = 0;
561 iobuf = NULL;
562 iobuf_len = 0;
563 minhello_len = (size_t)-1;
564 fallback = 0;
565 flags = 0;
566 fd = INVALID_SOCKET;
567 for (i = 0; i < argc; i ++) {
568 const char *arg;
569
570 arg = argv[i];
571 if (arg[0] != '-') {
572 if (server_name != NULL) {
573 fprintf(stderr,
574 "ERROR: duplicate server name\n");
575 usage_client();
576 goto client_exit_error;
577 }
578 server_name = arg;
579 continue;
580 }
581 if (eqstr(arg, "-v") || eqstr(arg, "-verbose")) {
582 verbose = 1;
583 } else if (eqstr(arg, "-q") || eqstr(arg, "-quiet")) {
584 verbose = 0;
585 } else if (eqstr(arg, "-trace")) {
586 trace = 1;
587 } else if (eqstr(arg, "-sni")) {
588 if (++ i >= argc) {
589 fprintf(stderr,
590 "ERROR: no argument for '-sni'\n");
591 usage_client();
592 goto client_exit_error;
593 }
594 if (sni != NULL) {
595 fprintf(stderr, "ERROR: duplicate SNI\n");
596 usage_client();
597 goto client_exit_error;
598 }
599 sni = argv[i];
600 } else if (eqstr(arg, "-nosni")) {
601 if (sni != NULL) {
602 fprintf(stderr, "ERROR: duplicate SNI\n");
603 usage_client();
604 goto client_exit_error;
605 }
606 sni = "";
607 } else if (eqstr(arg, "-mono")) {
608 bidi = 0;
609 } else if (eqstr(arg, "-buf")) {
610 if (++ i >= argc) {
611 fprintf(stderr,
612 "ERROR: no argument for '-buf'\n");
613 usage_client();
614 goto client_exit_error;
615 }
616 arg = argv[i];
617 if (iobuf_len != 0) {
618 fprintf(stderr,
619 "ERROR: duplicate I/O buffer length\n");
620 usage_client();
621 goto client_exit_error;
622 }
623 iobuf_len = parse_size(arg);
624 if (iobuf_len == (size_t)-1) {
625 usage_client();
626 goto client_exit_error;
627 }
628 } else if (eqstr(arg, "-CA")) {
629 if (++ i >= argc) {
630 fprintf(stderr,
631 "ERROR: no argument for '-CA'\n");
632 usage_client();
633 goto client_exit_error;
634 }
635 arg = argv[i];
636 if (read_trust_anchors(&anchors, arg) == 0) {
637 usage_client();
638 goto client_exit_error;
639 }
640 } else if (eqstr(arg, "-cert")) {
641 if (++ i >= argc) {
642 fprintf(stderr,
643 "ERROR: no argument for '-cert'\n");
644 usage_client();
645 goto client_exit_error;
646 }
647 if (chain != NULL) {
648 fprintf(stderr,
649 "ERROR: duplicate certificate chain\n");
650 usage_client();
651 goto client_exit_error;
652 }
653 arg = argv[i];
654 chain = read_certificates(arg, &chain_len);
655 if (chain == NULL || chain_len == 0) {
656 goto client_exit_error;
657 }
658 } else if (eqstr(arg, "-key")) {
659 if (++ i >= argc) {
660 fprintf(stderr,
661 "ERROR: no argument for '-key'\n");
662 usage_client();
663 goto client_exit_error;
664 }
665 if (sk != NULL) {
666 fprintf(stderr,
667 "ERROR: duplicate private key\n");
668 usage_client();
669 goto client_exit_error;
670 }
671 arg = argv[i];
672 sk = read_private_key(arg);
673 if (sk == NULL) {
674 goto client_exit_error;
675 }
676 } else if (eqstr(arg, "-nostaticecdh")) {
677 nostaticecdh = 1;
678 } else if (eqstr(arg, "-list")) {
679 list_names();
680 goto client_exit;
681 } else if (eqstr(arg, "-vmin")) {
682 if (++ i >= argc) {
683 fprintf(stderr,
684 "ERROR: no argument for '-vmin'\n");
685 usage_client();
686 goto client_exit_error;
687 }
688 arg = argv[i];
689 if (vmin != 0) {
690 fprintf(stderr,
691 "ERROR: duplicate minimum version\n");
692 usage_client();
693 goto client_exit_error;
694 }
695 vmin = parse_version(arg, strlen(arg));
696 if (vmin == 0) {
697 fprintf(stderr,
698 "ERROR: unrecognised version '%s'\n",
699 arg);
700 usage_client();
701 goto client_exit_error;
702 }
703 } else if (eqstr(arg, "-vmax")) {
704 if (++ i >= argc) {
705 fprintf(stderr,
706 "ERROR: no argument for '-vmax'\n");
707 usage_client();
708 goto client_exit_error;
709 }
710 arg = argv[i];
711 if (vmax != 0) {
712 fprintf(stderr,
713 "ERROR: duplicate maximum version\n");
714 usage_client();
715 goto client_exit_error;
716 }
717 vmax = parse_version(arg, strlen(arg));
718 if (vmax == 0) {
719 fprintf(stderr,
720 "ERROR: unrecognised version '%s'\n",
721 arg);
722 usage_client();
723 goto client_exit_error;
724 }
725 } else if (eqstr(arg, "-cs")) {
726 if (++ i >= argc) {
727 fprintf(stderr,
728 "ERROR: no argument for '-cs'\n");
729 usage_client();
730 goto client_exit_error;
731 }
732 arg = argv[i];
733 if (suites != NULL) {
734 fprintf(stderr, "ERROR: duplicate list"
735 " of cipher suites\n");
736 usage_client();
737 goto client_exit_error;
738 }
739 suites = parse_suites(arg, &num_suites);
740 if (suites == NULL) {
741 usage_client();
742 goto client_exit_error;
743 }
744 } else if (eqstr(arg, "-hf")) {
745 unsigned x;
746
747 if (++ i >= argc) {
748 fprintf(stderr,
749 "ERROR: no argument for '-hf'\n");
750 usage_client();
751 goto client_exit_error;
752 }
753 arg = argv[i];
754 x = parse_hash_functions(arg);
755 if (x == 0) {
756 usage_client();
757 goto client_exit_error;
758 }
759 hfuns |= x;
760 } else if (eqstr(arg, "-minhello")) {
761 if (++ i >= argc) {
762 fprintf(stderr,
763 "ERROR: no argument for '-minhello'\n");
764 usage_client();
765 goto client_exit_error;
766 }
767 arg = argv[i];
768 if (minhello_len != (size_t)-1) {
769 fprintf(stderr, "ERROR: duplicate minimum"
770 " ClientHello length\n");
771 usage_client();
772 goto client_exit_error;
773 }
774 minhello_len = parse_size(arg);
775 /*
776 * Minimum ClientHello length must fit on 16 bits.
777 */
778 if (minhello_len == (size_t)-1
779 || (((minhello_len >> 12) >> 4) != 0))
780 {
781 usage_client();
782 goto client_exit_error;
783 }
784 } else if (eqstr(arg, "-fallback")) {
785 fallback = 1;
786 } else if (eqstr(arg, "-noreneg")) {
787 flags |= BR_OPT_NO_RENEGOTIATION;
788 } else if (eqstr(arg, "-alpn")) {
789 if (++ i >= argc) {
790 fprintf(stderr,
791 "ERROR: no argument for '-alpn'\n");
792 usage_client();
793 goto client_exit_error;
794 }
795 VEC_ADD(alpn_names, xstrdup(argv[i]));
796 } else if (eqstr(arg, "-strictalpn")) {
797 flags |= BR_OPT_FAIL_ON_ALPN_MISMATCH;
798 } else {
799 fprintf(stderr, "ERROR: unknown option: '%s'\n", arg);
800 usage_client();
801 goto client_exit_error;
802 }
803 }
804 if (server_name == NULL) {
805 fprintf(stderr, "ERROR: no server name/address provided\n");
806 usage_client();
807 goto client_exit_error;
808 }
809 for (u = strlen(server_name); u > 0; u --) {
810 int c = server_name[u - 1];
811 if (c == ':') {
812 break;
813 }
814 if (c < '0' || c > '9') {
815 u = 0;
816 break;
817 }
818 }
819 if (u == 0) {
820 host = xstrdup(server_name);
821 port = xstrdup("443");
822 } else {
823 port = xstrdup(server_name + u);
824 host = xmalloc(u);
825 memcpy(host, server_name, u - 1);
826 host[u - 1] = 0;
827 }
828 if (sni == NULL) {
829 sni = host;
830 }
831
832 if (chain == NULL && sk != NULL) {
833 fprintf(stderr, "ERROR: private key specified, but"
834 " no certificate chain\n");
835 usage_client();
836 goto client_exit_error;
837 }
838 if (chain != NULL && sk == NULL) {
839 fprintf(stderr, "ERROR: certificate chain specified, but"
840 " no private key\n");
841 usage_client();
842 goto client_exit_error;
843 }
844
845 if (vmin == 0) {
846 vmin = BR_TLS10;
847 }
848 if (vmax == 0) {
849 vmax = BR_TLS12;
850 }
851 if (vmax < vmin) {
852 fprintf(stderr, "ERROR: impossible minimum/maximum protocol"
853 " version combination\n");
854 usage_client();
855 goto client_exit_error;
856 }
857 if (suites == NULL) {
858 num_suites = 0;
859
860 for (u = 0; cipher_suites[u].name; u ++) {
861 if ((cipher_suites[u].req & REQ_TLS12) == 0
862 || vmax >= BR_TLS12)
863 {
864 num_suites ++;
865 }
866 }
867 suites = xmalloc(num_suites * sizeof *suites);
868 num_suites = 0;
869 for (u = 0; cipher_suites[u].name; u ++) {
870 if ((cipher_suites[u].req & REQ_TLS12) == 0
871 || vmax >= BR_TLS12)
872 {
873 suites[num_suites ++] = cipher_suites[u];
874 }
875 }
876 }
877 if (hfuns == 0) {
878 hfuns = (unsigned)-1;
879 }
880 if (iobuf_len == 0) {
881 if (bidi) {
882 iobuf_len = BR_SSL_BUFSIZE_BIDI;
883 } else {
884 iobuf_len = BR_SSL_BUFSIZE_MONO;
885 }
886 }
887 iobuf = xmalloc(iobuf_len);
888
889 /*
890 * Compute implementation requirements and inject implementations.
891 */
892 suite_ids = xmalloc((num_suites + 1) * sizeof *suite_ids);
893 br_ssl_client_zero(&cc);
894 br_ssl_engine_set_versions(&cc.eng, vmin, vmax);
895 dnhash = NULL;
896 for (u = 0; hash_functions[u].name; u ++) {
897 const br_hash_class *hc;
898 int id;
899
900 hc = hash_functions[u].hclass;
901 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
902 if ((hfuns & ((unsigned)1 << id)) != 0) {
903 dnhash = hc;
904 }
905 }
906 if (dnhash == NULL) {
907 fprintf(stderr, "ERROR: no supported hash function\n");
908 goto client_exit_error;
909 }
910 br_x509_minimal_init(&xc, dnhash,
911 &VEC_ELT(anchors, 0), VEC_LEN(anchors));
912 if (vmin <= BR_TLS11) {
913 if (!(hfuns & (1 << br_md5_ID))) {
914 fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need MD5\n");
915 goto client_exit_error;
916 }
917 if (!(hfuns & (1 << br_sha1_ID))) {
918 fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
919 goto client_exit_error;
920 }
921 }
922 for (u = 0; u < num_suites; u ++) {
923 unsigned req;
924
925 req = suites[u].req;
926 suite_ids[u] = suites[u].suite;
927 if ((req & REQ_TLS12) != 0 && vmax < BR_TLS12) {
928 fprintf(stderr,
929 "ERROR: cipher suite %s requires TLS 1.2\n",
930 suites[u].name);
931 goto client_exit_error;
932 }
933 if ((req & REQ_SHA1) != 0 && !(hfuns & (1 << br_sha1_ID))) {
934 fprintf(stderr,
935 "ERROR: cipher suite %s requires SHA-1\n",
936 suites[u].name);
937 goto client_exit_error;
938 }
939 if ((req & REQ_SHA256) != 0 && !(hfuns & (1 << br_sha256_ID))) {
940 fprintf(stderr,
941 "ERROR: cipher suite %s requires SHA-256\n",
942 suites[u].name);
943 goto client_exit_error;
944 }
945 if ((req & REQ_SHA384) != 0 && !(hfuns & (1 << br_sha384_ID))) {
946 fprintf(stderr,
947 "ERROR: cipher suite %s requires SHA-384\n",
948 suites[u].name);
949 goto client_exit_error;
950 }
951 /* TODO: algorithm implementation selection */
952 if ((req & REQ_AESCBC) != 0) {
953 br_ssl_engine_set_default_aes_cbc(&cc.eng);
954 }
955 if ((req & REQ_AESGCM) != 0) {
956 br_ssl_engine_set_default_aes_gcm(&cc.eng);
957 }
958 if ((req & REQ_CHAPOL) != 0) {
959 br_ssl_engine_set_default_chapol(&cc.eng);
960 }
961 if ((req & REQ_3DESCBC) != 0) {
962 br_ssl_engine_set_default_des_cbc(&cc.eng);
963 }
964 if ((req & REQ_RSAKEYX) != 0) {
965 br_ssl_client_set_default_rsapub(&cc);
966 }
967 if ((req & REQ_ECDHE_RSA) != 0) {
968 br_ssl_engine_set_default_ec(&cc.eng);
969 br_ssl_engine_set_default_rsavrfy(&cc.eng);
970 }
971 if ((req & REQ_ECDHE_ECDSA) != 0) {
972 br_ssl_engine_set_default_ecdsa(&cc.eng);
973 }
974 if ((req & REQ_ECDH) != 0) {
975 br_ssl_engine_set_default_ec(&cc.eng);
976 }
977 }
978 if (fallback) {
979 suite_ids[num_suites ++] = 0x5600;
980 }
981 br_ssl_engine_set_suites(&cc.eng, suite_ids, num_suites);
982
983 for (u = 0; hash_functions[u].name; u ++) {
984 const br_hash_class *hc;
985 int id;
986
987 hc = hash_functions[u].hclass;
988 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
989 if ((hfuns & ((unsigned)1 << id)) != 0) {
990 br_ssl_engine_set_hash(&cc.eng, id, hc);
991 br_x509_minimal_set_hash(&xc, id, hc);
992 }
993 }
994 if (vmin <= BR_TLS11) {
995 br_ssl_engine_set_prf10(&cc.eng, &br_tls10_prf);
996 }
997 if (vmax >= BR_TLS12) {
998 if ((hfuns & ((unsigned)1 << br_sha256_ID)) != 0) {
999 br_ssl_engine_set_prf_sha256(&cc.eng,
1000 &br_tls12_sha256_prf);
1001 }
1002 if ((hfuns & ((unsigned)1 << br_sha384_ID)) != 0) {
1003 br_ssl_engine_set_prf_sha384(&cc.eng,
1004 &br_tls12_sha384_prf);
1005 }
1006 }
1007 br_x509_minimal_set_rsa(&xc, br_rsa_pkcs1_vrfy_get_default());
1008 br_x509_minimal_set_ecdsa(&xc,
1009 br_ec_get_default(), br_ecdsa_vrfy_asn1_get_default());
1010
1011 /*
1012 * If there is no provided trust anchor, then certificate validation
1013 * will always fail. In that situation, we use our custom wrapper
1014 * that tolerates unknown anchors.
1015 */
1016 if (VEC_LEN(anchors) == 0) {
1017 if (verbose) {
1018 fprintf(stderr,
1019 "WARNING: no configured trust anchor\n");
1020 }
1021 x509_noanchor_init(&xwc, &xc.vtable);
1022 br_ssl_engine_set_x509(&cc.eng, &xwc.vtable);
1023 } else {
1024 br_ssl_engine_set_x509(&cc.eng, &xc.vtable);
1025 }
1026
1027 if (minhello_len != (size_t)-1) {
1028 br_ssl_client_set_min_clienthello_len(&cc, minhello_len);
1029 }
1030 br_ssl_engine_set_all_flags(&cc.eng, flags);
1031 if (VEC_LEN(alpn_names) != 0) {
1032 br_ssl_engine_set_protocol_names(&cc.eng,
1033 (const char **)&VEC_ELT(alpn_names, 0),
1034 VEC_LEN(alpn_names));
1035 }
1036
1037 if (chain != NULL) {
1038 zc.vtable = &ccert_vtable;
1039 zc.verbose = verbose;
1040 zc.chain = chain;
1041 zc.chain_len = chain_len;
1042 zc.sk = sk;
1043 if (nostaticecdh || sk->key_type != BR_KEYTYPE_EC) {
1044 zc.issuer_key_type = 0;
1045 } else {
1046 zc.issuer_key_type = get_cert_signer_algo(&chain[0]);
1047 if (zc.issuer_key_type == 0) {
1048 goto client_exit_error;
1049 }
1050 }
1051 br_ssl_client_set_client_certificate(&cc, &zc.vtable);
1052 }
1053
1054 br_ssl_engine_set_buffer(&cc.eng, iobuf, iobuf_len, bidi);
1055 br_ssl_client_reset(&cc, sni, 0);
1056
1057 /*
1058 * On Unix systems, we need to avoid SIGPIPE.
1059 */
1060 #ifndef _WIN32
1061 signal(SIGPIPE, SIG_IGN);
1062 #endif
1063
1064 /*
1065 * Connect to the peer.
1066 */
1067 fd = host_connect(host, port, verbose);
1068 if (fd == INVALID_SOCKET) {
1069 goto client_exit_error;
1070 }
1071
1072 /*
1073 * Run the engine until completion.
1074 */
1075 if (run_ssl_engine(&cc.eng, fd,
1076 (verbose ? RUN_ENGINE_VERBOSE : 0)
1077 | (trace ? RUN_ENGINE_TRACE : 0)) != 0)
1078 {
1079 goto client_exit_error;
1080 } else {
1081 goto client_exit;
1082 }
1083
1084 /*
1085 * Release allocated structures.
1086 */
1087 client_exit:
1088 xfree(host);
1089 xfree(port);
1090 xfree(suites);
1091 xfree(suite_ids);
1092 VEC_CLEAREXT(anchors, &free_ta_contents);
1093 VEC_CLEAREXT(alpn_names, &free_alpn);
1094 free_certificates(chain, chain_len);
1095 free_private_key(sk);
1096 xfree(iobuf);
1097 if (fd != INVALID_SOCKET) {
1098 #ifdef _WIN32
1099 closesocket(fd);
1100 #else
1101 close(fd);
1102 #endif
1103 }
1104 return retcode;
1105
1106 client_exit_error:
1107 retcode = -1;
1108 goto client_exit;
1109 }