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1/* $OpenBSD: s_client.c,v 1.67 2025/01/02 16:07:41 tb Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58/* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111/* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
113 *
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
116 * license.
117 *
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
121 *
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
125 *
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
130 *
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
135 * OTHERWISE.
136 */
137
138#include <sys/types.h>
139#include <sys/socket.h>
140
141#include <netinet/in.h>
142
143#include <assert.h>
144#include <ctype.h>
145#include <limits.h>
146#include <netdb.h>
147#include <stdio.h>
148#include <stdlib.h>
149#include <string.h>
150#include <unistd.h>
151#include <poll.h>
152
153#include "apps.h"
154
155#include <openssl/bn.h>
156#include <openssl/err.h>
157#include <openssl/ocsp.h>
158#include <openssl/pem.h>
159#include <openssl/ssl.h>
160#include <openssl/x509.h>
161
162#define SSL_HOST_NAME "localhost"
163
164#define BUFSIZZ 1024*8
165
166static void sc_usage(void);
167static void print_stuff(BIO *berr, SSL *con, int full);
168static int ocsp_resp_cb(SSL *s, void *arg);
169static int ssl_servername_cb(SSL *s, int *ad, void *arg);
170
171enum {
172 PROTO_OFF = 0,
173 PROTO_SMTP,
174 PROTO_LMTP,
175 PROTO_POP3,
176 PROTO_IMAP,
177 PROTO_FTP,
178 PROTO_XMPP,
179};
180
181/* This is a context that we pass to callbacks */
182typedef struct tlsextctx_st {
183 BIO *biodebug;
184 int ack;
185} tlsextctx;
186
187static struct {
188 int af;
189 char *alpn_in;
190 int bugs;
191 char *CAfile;
192 char *CApath;
193 char *cert_file;
194 int cert_format;
195 char *cipher;
196 unsigned int clr;
197 char *connect;
198 int crlf;
199 int debug;
200 int enable_timeouts;
201 const char *errstr;
202 char *groups_in;
203 char *host;
204 int ign_eof;
205 char *key_file;
206 int key_format;
207 char *keymatexportlabel;
208 int keymatexportlen;
209 uint16_t max_version;
210 uint16_t min_version;
211 const SSL_METHOD *meth;
212 int msg;
213 int nbio;
214 int nbio_test;
215 int no_servername;
216 char *npn_in;
217 unsigned int off;
218 char *passarg;
219 int peekaboo;
220 char *port;
221 int prexit;
222 char *proxy;
223 int quiet;
224 int reconnect;
225 char *servername;
226 char *sess_in;
227 char *sess_out;
228 int showcerts;
229 int socket_type;
230 long socket_mtu;
231#ifndef OPENSSL_NO_SRTP
232 char *srtp_profiles;
233#endif
234 int starttls_proto;
235 int state;
236 int status_req;
237 int tlsextdebug;
238 int verify;
239 X509_VERIFY_PARAM *vpm;
240 char *xmpphost;
241} cfg;
242
243static int
244s_client_opt_keymatexportlen(char *arg)
245{
246 cfg.keymatexportlen = strtonum(arg, 1, INT_MAX,
247 &cfg.errstr);
248 if (cfg.errstr != NULL) {
249 BIO_printf(bio_err, "invalid argument %s: %s\n",
250 arg, cfg.errstr);
251 return (1);
252 }
253 return (0);
254}
255
256#ifndef OPENSSL_NO_DTLS
257static int
258s_client_opt_mtu(char *arg)
259{
260 cfg.socket_mtu = strtonum(arg, 0, LONG_MAX,
261 &cfg.errstr);
262 if (cfg.errstr != NULL) {
263 BIO_printf(bio_err, "invalid argument %s: %s\n",
264 arg, cfg.errstr);
265 return (1);
266 }
267 return (0);
268}
269#endif
270
271static int
272s_client_opt_port(char *arg)
273{
274 if (*arg == '\0')
275 return (1);
276
277 cfg.port = arg;
278 return (0);
279}
280
281#ifndef OPENSSL_NO_DTLS
282static int
283s_client_opt_protocol_version_dtls(void)
284{
285 cfg.meth = DTLS_client_method();
286 cfg.socket_type = SOCK_DGRAM;
287 return (0);
288}
289#endif
290
291#ifndef OPENSSL_NO_DTLS1_2
292static int
293s_client_opt_protocol_version_dtls1_2(void)
294{
295 cfg.meth = DTLS_client_method();
296 cfg.min_version = DTLS1_2_VERSION;
297 cfg.max_version = DTLS1_2_VERSION;
298 cfg.socket_type = SOCK_DGRAM;
299 return (0);
300}
301#endif
302
303static int
304s_client_opt_protocol_version_tls1_2(void)
305{
306 cfg.min_version = TLS1_2_VERSION;
307 cfg.max_version = TLS1_2_VERSION;
308 return (0);
309}
310
311static int
312s_client_opt_protocol_version_tls1_3(void)
313{
314 cfg.min_version = TLS1_3_VERSION;
315 cfg.max_version = TLS1_3_VERSION;
316 return (0);
317}
318
319static int
320s_client_opt_quiet(void)
321{
322 cfg.quiet = 1;
323 cfg.ign_eof = 1;
324 return (0);
325}
326
327static int
328s_client_opt_starttls(char *arg)
329{
330 if (strcmp(arg, "smtp") == 0)
331 cfg.starttls_proto = PROTO_SMTP;
332 else if (strcmp(arg, "lmtp") == 0)
333 cfg.starttls_proto = PROTO_LMTP;
334 else if (strcmp(arg, "pop3") == 0)
335 cfg.starttls_proto = PROTO_POP3;
336 else if (strcmp(arg, "imap") == 0)
337 cfg.starttls_proto = PROTO_IMAP;
338 else if (strcmp(arg, "ftp") == 0)
339 cfg.starttls_proto = PROTO_FTP;
340 else if (strcmp(arg, "xmpp") == 0)
341 cfg.starttls_proto = PROTO_XMPP;
342 else
343 return (1);
344 return (0);
345}
346
347static int
348s_client_opt_verify(char *arg)
349{
350 cfg.verify = SSL_VERIFY_PEER;
351
352 verify_depth = strtonum(arg, 0, INT_MAX, &cfg.errstr);
353 if (cfg.errstr != NULL) {
354 BIO_printf(bio_err, "invalid argument %s: %s\n",
355 arg, cfg.errstr);
356 return (1);
357 }
358 BIO_printf(bio_err, "verify depth is %d\n", verify_depth);
359 return (0);
360}
361
362static int
363s_client_opt_verify_param(int argc, char **argv, int *argsused)
364{
365 char **pargs = argv;
366 int pargc = argc;
367 int badarg = 0;
368
369 if (!args_verify(&pargs, &pargc, &badarg, bio_err,
370 &cfg.vpm)) {
371 BIO_printf(bio_err, "unknown option %s\n", *argv);
372 return (1);
373 }
374 if (badarg)
375 return (1);
376
377 *argsused = argc - pargc;
378 return (0);
379}
380
381static const struct option s_client_options[] = {
382 {
383 .name = "4",
384 .desc = "Use IPv4 only",
385 .type = OPTION_VALUE,
386 .opt.value = &cfg.af,
387 .value = AF_INET,
388 },
389 {
390 .name = "6",
391 .desc = "Use IPv6 only",
392 .type = OPTION_VALUE,
393 .opt.value = &cfg.af,
394 .value = AF_INET6,
395 },
396 {
397 .name = "alpn",
398 .argname = "protocols",
399 .desc = "Set the advertised protocols for ALPN"
400 " (comma-separated list)",
401 .type = OPTION_ARG,
402 .opt.arg = &cfg.alpn_in,
403 },
404 {
405 .name = "bugs",
406 .desc = "Enable various workarounds for buggy implementations",
407 .type = OPTION_FLAG,
408 .opt.flag = &cfg.bugs,
409 },
410 {
411 .name = "CAfile",
412 .argname = "file",
413 .desc = "PEM format file of CA certificates",
414 .type = OPTION_ARG,
415 .opt.arg = &cfg.CAfile,
416 },
417 {
418 .name = "CApath",
419 .argname = "directory",
420 .desc = "PEM format directory of CA certificates",
421 .type = OPTION_ARG,
422 .opt.arg = &cfg.CApath,
423 },
424 {
425 .name = "cert",
426 .argname = "file",
427 .desc = "Certificate file to use, PEM format assumed",
428 .type = OPTION_ARG,
429 .opt.arg = &cfg.cert_file,
430 },
431 {
432 .name = "certform",
433 .argname = "fmt",
434 .desc = "Certificate format (PEM or DER) PEM default",
435 .type = OPTION_ARG_FORMAT,
436 .opt.value = &cfg.cert_format,
437 },
438 {
439 .name = "cipher",
440 .argname = "cipherlist",
441 .desc = "Preferred cipher to use (see 'openssl ciphers')",
442 .type = OPTION_ARG,
443 .opt.arg = &cfg.cipher,
444 },
445 {
446 .name = "connect",
447 .argname = "host:port",
448 .desc = "Who to connect to (default is localhost:4433)",
449 .type = OPTION_ARG,
450 .opt.arg = &cfg.connect,
451 },
452 {
453 .name = "crlf",
454 .desc = "Convert LF from terminal into CRLF",
455 .type = OPTION_FLAG,
456 .opt.flag = &cfg.crlf,
457 },
458 {
459 .name = "debug",
460 .desc = "Print extensive debugging information",
461 .type = OPTION_FLAG,
462 .opt.flag = &cfg.debug,
463 },
464#ifndef OPENSSL_NO_DTLS
465 {
466 .name = "dtls",
467 .desc = "Use any version of DTLS",
468 .type = OPTION_FUNC,
469 .opt.func = s_client_opt_protocol_version_dtls,
470 },
471#endif
472#ifndef OPENSSL_NO_DTLS1_2
473 {
474 .name = "dtls1_2",
475 .desc = "Just use DTLSv1.2",
476 .type = OPTION_FUNC,
477 .opt.func = s_client_opt_protocol_version_dtls1_2,
478 },
479#endif
480 {
481 .name = "groups",
482 .argname = "list",
483 .desc = "Specify EC groups (colon-separated list)",
484 .type = OPTION_ARG,
485 .opt.arg = &cfg.groups_in,
486 },
487 {
488 .name = "host",
489 .argname = "host",
490 .desc = "Use -connect instead",
491 .type = OPTION_ARG,
492 .opt.arg = &cfg.host,
493 },
494 {
495 .name = "ign_eof",
496 .desc = "Ignore input EOF (default when -quiet)",
497 .type = OPTION_VALUE,
498 .opt.value = &cfg.ign_eof,
499 .value = 1,
500 },
501 {
502 .name = "key",
503 .argname = "file",
504 .desc = "Private key file to use, if not, -cert file is used",
505 .type = OPTION_ARG,
506 .opt.arg = &cfg.key_file,
507 },
508 {
509 .name = "keyform",
510 .argname = "fmt",
511 .desc = "Key format (PEM or DER) PEM default",
512 .type = OPTION_ARG_FORMAT,
513 .opt.value = &cfg.key_format,
514 },
515 {
516 .name = "keymatexport",
517 .argname = "label",
518 .desc = "Export keying material using label",
519 .type = OPTION_ARG,
520 .opt.arg = &cfg.keymatexportlabel,
521 },
522 {
523 .name = "keymatexportlen",
524 .argname = "len",
525 .desc = "Export len bytes of keying material (default 20)",
526 .type = OPTION_ARG_FUNC,
527 .opt.argfunc = s_client_opt_keymatexportlen,
528 },
529 {
530 .name = "legacy_renegotiation",
531 .type = OPTION_DISCARD,
532 },
533 {
534 .name = "legacy_server_connect",
535 .desc = "Allow initial connection to servers that don't support RI",
536 .type = OPTION_VALUE_OR,
537 .opt.value = &cfg.off,
538 .value = SSL_OP_LEGACY_SERVER_CONNECT,
539 },
540 {
541 .name = "msg",
542 .desc = "Show all protocol messages with hex dump",
543 .type = OPTION_FLAG,
544 .opt.flag = &cfg.msg,
545 },
546#ifndef OPENSSL_NO_DTLS
547 {
548 .name = "mtu",
549 .argname = "mtu",
550 .desc = "Set the link layer MTU on DTLS connections",
551 .type = OPTION_ARG_FUNC,
552 .opt.argfunc = s_client_opt_mtu,
553 },
554#endif
555 {
556 .name = "nbio",
557 .desc = "Turn on non-blocking I/O",
558 .type = OPTION_FLAG,
559 .opt.flag = &cfg.nbio,
560 },
561 {
562 .name = "nbio_test",
563 .desc = "Test non-blocking I/O",
564 .type = OPTION_FLAG,
565 .opt.flag = &cfg.nbio_test,
566 },
567 {
568 .name = "nextprotoneg",
569 .argname = "protocols",
570 .type = OPTION_ARG,
571 .opt.arg = &cfg.npn_in, /* Ignored. */
572 },
573 {
574 .name = "no_comp",
575 .type = OPTION_VALUE_OR,
576 .opt.value = &cfg.off,
577 .value = SSL_OP_NO_COMPRESSION,
578 },
579 {
580 .name = "no_ign_eof",
581 .desc = "Don't ignore input EOF",
582 .type = OPTION_VALUE,
583 .opt.value = &cfg.ign_eof,
584 .value = 0,
585 },
586 {
587 .name = "no_legacy_server_connect",
588 .desc = "Disallow initial connection to servers that don't support RI",
589 .type = OPTION_VALUE_OR,
590 .opt.value = &cfg.clr,
591 .value = SSL_OP_LEGACY_SERVER_CONNECT,
592 },
593 {
594 .name = "no_servername",
595 .desc = "Do not send a Server Name Indication (SNI) extension",
596 .type = OPTION_FLAG,
597 .opt.value = &cfg.no_servername,
598 },
599 {
600 .name = "no_ssl2",
601 .type = OPTION_VALUE_OR,
602 .opt.value = &cfg.off,
603 .value = SSL_OP_NO_SSLv2,
604 },
605 {
606 .name = "no_ssl3",
607 .type = OPTION_VALUE_OR,
608 .opt.value = &cfg.off,
609 .value = SSL_OP_NO_SSLv3,
610 },
611 {
612 .name = "no_ticket",
613 .desc = "Disable use of RFC4507 session ticket support",
614 .type = OPTION_VALUE_OR,
615 .opt.value = &cfg.off,
616 .value = SSL_OP_NO_TICKET,
617 },
618 {
619 .name = "no_tls1",
620 .type = OPTION_DISCARD,
621 },
622 {
623 .name = "no_tls1_1",
624 .type = OPTION_DISCARD,
625 },
626 {
627 .name = "no_tls1_2",
628 .desc = "Disable the use of TLSv1.2",
629 .type = OPTION_VALUE_OR,
630 .opt.value = &cfg.off,
631 .value = SSL_OP_NO_TLSv1_2,
632 },
633 {
634 .name = "no_tls1_3",
635 .desc = "Disable the use of TLSv1.3",
636 .type = OPTION_VALUE_OR,
637 .opt.value = &cfg.off,
638 .value = SSL_OP_NO_TLSv1_3,
639 },
640 {
641 .name = "noservername",
642 .type = OPTION_FLAG,
643 .opt.value = &cfg.no_servername,
644 },
645 {
646 .name = "pass",
647 .argname = "arg",
648 .desc = "Private key file pass phrase source",
649 .type = OPTION_ARG,
650 .opt.arg = &cfg.passarg,
651 },
652 {
653 .name = "pause",
654 .type = OPTION_DISCARD,
655 },
656 {
657 .name = "peekaboo",
658 .type = OPTION_FLAG,
659 .opt.flag = &cfg.peekaboo,
660 },
661 {
662 .name = "port",
663 .argname = "port",
664 .desc = "Use -connect instead",
665 .type = OPTION_ARG_FUNC,
666 .opt.argfunc = s_client_opt_port,
667 },
668 {
669 .name = "prexit",
670 .desc = "Print session information when the program exits",
671 .type = OPTION_FLAG,
672 .opt.flag = &cfg.prexit,
673 },
674 {
675 .name = "proxy",
676 .argname = "host:port",
677 .desc = "Connect to http proxy",
678 .type = OPTION_ARG,
679 .opt.arg = &cfg.proxy,
680 },
681 {
682 .name = "quiet",
683 .desc = "Inhibit printing of session and certificate info",
684 .type = OPTION_FUNC,
685 .opt.func = s_client_opt_quiet,
686 },
687 {
688 .name = "reconnect",
689 .desc = "Drop and re-make the connection with the same Session-ID",
690 .type = OPTION_VALUE,
691 .opt.value = &cfg.reconnect,
692 .value = 5,
693 },
694 {
695 .name = "servername",
696 .argname = "name",
697 .desc = "Set TLS extension servername in ClientHello (SNI)",
698 .type = OPTION_ARG,
699 .opt.arg = &cfg.servername,
700 },
701 {
702 .name = "serverpref",
703 .desc = "Use server's cipher preferences",
704 .type = OPTION_VALUE_OR,
705 .opt.value = &cfg.off,
706 .value = SSL_OP_CIPHER_SERVER_PREFERENCE,
707 },
708 {
709 .name = "sess_in",
710 .argname = "file",
711 .desc = "File to read TLS session from",
712 .type = OPTION_ARG,
713 .opt.arg = &cfg.sess_in,
714 },
715 {
716 .name = "sess_out",
717 .argname = "file",
718 .desc = "File to write TLS session to",
719 .type = OPTION_ARG,
720 .opt.arg = &cfg.sess_out,
721 },
722 {
723 .name = "showcerts",
724 .desc = "Show all server certificates in the chain",
725 .type = OPTION_FLAG,
726 .opt.flag = &cfg.showcerts,
727 },
728 {
729 .name = "starttls",
730 .argname = "protocol",
731 .desc = "Use the STARTTLS command before starting TLS,\n"
732 "smtp, lmtp, pop3, imap, ftp and xmpp are supported.",
733 .type = OPTION_ARG_FUNC,
734 .opt.argfunc = s_client_opt_starttls,
735 },
736 {
737 .name = "state",
738 .desc = "Print the TLS session states",
739 .type = OPTION_FLAG,
740 .opt.flag = &cfg.state,
741 },
742 {
743 .name = "status",
744 .desc = "Send a certificate status request to the server (OCSP)",
745 .type = OPTION_FLAG,
746 .opt.flag = &cfg.status_req,
747 },
748#ifndef OPENSSL_NO_DTLS
749 {
750 .name = "timeout",
751 .desc = "Enable send/receive timeout on DTLS connections",
752 .type = OPTION_FLAG,
753 .opt.flag = &cfg.enable_timeouts,
754 },
755#endif
756 {
757 .name = "tls1_2",
758 .desc = "Just use TLSv1.2",
759 .type = OPTION_FUNC,
760 .opt.func = s_client_opt_protocol_version_tls1_2,
761 },
762 {
763 .name = "tls1_3",
764 .desc = "Just use TLSv1.3",
765 .type = OPTION_FUNC,
766 .opt.func = s_client_opt_protocol_version_tls1_3,
767 },
768 {
769 .name = "tlsextdebug",
770 .desc = "Hex dump of all TLS extensions received",
771 .type = OPTION_FLAG,
772 .opt.flag = &cfg.tlsextdebug,
773 },
774#ifndef OPENSSL_NO_SRTP
775 {
776 .name = "use_srtp",
777 .argname = "profiles",
778 .desc = "Offer SRTP key management with a colon-separated profiles",
779 .type = OPTION_ARG,
780 .opt.arg = &cfg.srtp_profiles,
781 },
782#endif
783 {
784 .name = "verify",
785 .argname = "depth",
786 .desc = "Turn on peer certificate verification, with a max of depth",
787 .type = OPTION_ARG_FUNC,
788 .opt.argfunc = s_client_opt_verify,
789 },
790 {
791 .name = "verify_return_error",
792 .desc = "Return verification error",
793 .type = OPTION_FLAG,
794 .opt.flag = &verify_return_error,
795 },
796 {
797 .name = "xmpphost",
798 .argname = "host",
799 .desc = "Connect to this virtual host on the xmpp server",
800 .type = OPTION_ARG,
801 .opt.arg = &cfg.xmpphost,
802 },
803 {
804 .name = NULL,
805 .desc = "",
806 .type = OPTION_ARGV_FUNC,
807 .opt.argvfunc = s_client_opt_verify_param,
808 },
809 { NULL },
810};
811
812static void
813sc_usage(void)
814{
815 fprintf(stderr, "usage: s_client "
816 "[-4 | -6] [-alpn protocols] [-bugs] [-CAfile file]\n"
817 " [-CApath directory] [-cert file] [-certform der | pem] [-check_ss_sig]\n"
818 " [-cipher cipherlist] [-connect host[:port]] [-crl_check]\n"
819 " [-crl_check_all] [-crlf] [-debug] [-dtls] [-dtls1_2] [-extended_crl]\n"
820 " [-groups list] [-host host] [-ign_eof] [-ignore_critical]\n"
821 " [-issuer_checks] [-key keyfile] [-keyform der | pem]\n"
822 " [-keymatexport label] [-keymatexportlen len] [-legacy_server_connect]\n"
823 " [-msg] [-mtu mtu] [-nbio] [-nbio_test] [-no_comp] [-no_ign_eof]\n"
824 " [-no_legacy_server_connect] [-no_ticket] \n"
825 " [-no_tls1_2] [-no_tls1_3] [-pass arg] [-policy_check]\n"
826 " [-port port] [-prexit] [-proxy host:port] [-quiet] [-reconnect]\n"
827 " [-servername name] [-serverpref] [-sess_in file] [-sess_out file]\n"
828 " [-showcerts] [-starttls protocol] [-state] [-status] [-timeout]\n"
829 " [-tls1_2] [-tls1_3] [-tlsextdebug]\n"
830 " [-use_srtp profiles] [-verify depth] [-verify_return_error]\n"
831 " [-x509_strict] [-xmpphost host]\n");
832 fprintf(stderr, "\n");
833 options_usage(s_client_options);
834 fprintf(stderr, "\n");
835}
836
837int
838s_client_main(int argc, char **argv)
839{
840 SSL *con = NULL;
841 int s, k, p = 0, pending = 0;
842 char *cbuf = NULL, *sbuf = NULL, *mbuf = NULL, *pbuf = NULL;
843 int cbuf_len, cbuf_off;
844 int sbuf_len, sbuf_off;
845 int full_log = 1;
846 const char *servername;
847 char *pass = NULL;
848 X509 *cert = NULL;
849 EVP_PKEY *key = NULL;
850 int badop = 0;
851 int write_tty, read_tty, write_ssl, read_ssl, tty_on, ssl_pending;
852 SSL_CTX *ctx = NULL;
853 int ret = 1, in_init = 1, i;
854 BIO *bio_c_out = NULL;
855 BIO *sbio;
856 int mbuf_len = 0;
857 struct timeval timeout;
858 tlsextctx tlsextcbp = {NULL, 0};
859 struct sockaddr_storage peer;
860 int peerlen = sizeof(peer);
861
862 if (pledge("stdio cpath wpath rpath inet dns tty", NULL) == -1) {
863 perror("pledge");
864 exit(1);
865 }
866
867 memset(&cfg, 0, sizeof(cfg));
868 cfg.af = AF_UNSPEC;
869 cfg.cert_format = FORMAT_PEM;
870 cfg.host = SSL_HOST_NAME;
871 cfg.key_format = FORMAT_PEM;
872 cfg.keymatexportlen = 20;
873 cfg.meth = TLS_client_method();
874 cfg.port = PORT_STR;
875 cfg.socket_type = SOCK_STREAM;
876 cfg.starttls_proto = PROTO_OFF;
877 cfg.verify = SSL_VERIFY_NONE;
878
879 if (((cbuf = malloc(BUFSIZZ)) == NULL) ||
880 ((sbuf = malloc(BUFSIZZ)) == NULL) ||
881 ((pbuf = malloc(BUFSIZZ)) == NULL) ||
882 ((mbuf = malloc(BUFSIZZ + 1)) == NULL)) { /* NUL byte */
883 BIO_printf(bio_err, "out of memory\n");
884 goto end;
885 }
886 verify_depth = 0;
887
888 if (options_parse(argc, argv, s_client_options, NULL, NULL) != 0) {
889 badop = 1;
890 goto bad;
891 }
892 if (cfg.proxy != NULL) {
893 if (!extract_host_port(cfg.proxy,
894 &cfg.host, NULL, &cfg.port))
895 goto bad;
896 if (cfg.connect == NULL)
897 cfg.connect = SSL_HOST_NAME;
898 } else if (cfg.connect != NULL) {
899 if (!extract_host_port(cfg.connect,
900 &cfg.host, NULL, &cfg.port))
901 goto bad;
902 }
903 if (badop) {
904 bad:
905 if (cfg.errstr == NULL)
906 sc_usage();
907 goto end;
908 }
909
910 if (!app_passwd(bio_err, cfg.passarg, NULL, &pass, NULL)) {
911 BIO_printf(bio_err, "Error getting password\n");
912 goto end;
913 }
914 if (cfg.key_file == NULL)
915 cfg.key_file = cfg.cert_file;
916
917
918 if (cfg.key_file) {
919
920 key = load_key(bio_err, cfg.key_file,
921 cfg.key_format, 0, pass,
922 "client certificate private key file");
923 if (!key) {
924 ERR_print_errors(bio_err);
925 goto end;
926 }
927 }
928 if (cfg.cert_file) {
929 cert = load_cert(bio_err, cfg.cert_file,
930 cfg.cert_format,
931 NULL, "client certificate file");
932
933 if (!cert) {
934 ERR_print_errors(bio_err);
935 goto end;
936 }
937 }
938 if (cfg.quiet && !cfg.debug &&
939 !cfg.msg) {
940 if ((bio_c_out = BIO_new(BIO_s_null())) == NULL)
941 goto end;
942 } else {
943 if ((bio_c_out = BIO_new_fp(stdout, BIO_NOCLOSE)) == NULL)
944 goto end;
945 }
946
947 ctx = SSL_CTX_new(cfg.meth);
948 if (ctx == NULL) {
949 ERR_print_errors(bio_err);
950 goto end;
951 }
952
953 SSL_CTX_clear_mode(ctx, SSL_MODE_AUTO_RETRY);
954
955 if (cfg.vpm)
956 SSL_CTX_set1_param(ctx, cfg.vpm);
957
958 if (!SSL_CTX_set_min_proto_version(ctx, cfg.min_version))
959 goto end;
960 if (!SSL_CTX_set_max_proto_version(ctx, cfg.max_version))
961 goto end;
962
963#ifndef OPENSSL_NO_SRTP
964 if (cfg.srtp_profiles != NULL)
965 SSL_CTX_set_tlsext_use_srtp(ctx, cfg.srtp_profiles);
966#endif
967 if (cfg.bugs)
968 SSL_CTX_set_options(ctx, SSL_OP_ALL | cfg.off);
969 else
970 SSL_CTX_set_options(ctx, cfg.off);
971
972 if (cfg.clr)
973 SSL_CTX_clear_options(ctx, cfg.clr);
974
975 if (cfg.alpn_in) {
976 unsigned short alpn_len;
977 unsigned char *alpn;
978
979 alpn = next_protos_parse(&alpn_len, cfg.alpn_in);
980 if (alpn == NULL) {
981 BIO_printf(bio_err, "Error parsing -alpn argument\n");
982 goto end;
983 }
984 SSL_CTX_set_alpn_protos(ctx, alpn, alpn_len);
985 free(alpn);
986 }
987 if (cfg.groups_in != NULL) {
988 if (SSL_CTX_set1_groups_list(ctx, cfg.groups_in) != 1) {
989 BIO_printf(bio_err, "Failed to set groups '%s'\n",
990 cfg.groups_in);
991 goto end;
992 }
993 }
994
995 if (cfg.state)
996 SSL_CTX_set_info_callback(ctx, apps_ssl_info_callback);
997 if (cfg.cipher != NULL)
998 if (!SSL_CTX_set_cipher_list(ctx, cfg.cipher)) {
999 BIO_printf(bio_err, "error setting cipher list\n");
1000 ERR_print_errors(bio_err);
1001 goto end;
1002 }
1003
1004 SSL_CTX_set_verify(ctx, cfg.verify, verify_callback);
1005 if (!set_cert_key_stuff(ctx, cert, key))
1006 goto end;
1007
1008 if ((cfg.CAfile || cfg.CApath)
1009 && !SSL_CTX_load_verify_locations(ctx, cfg.CAfile,
1010 cfg.CApath))
1011 ERR_print_errors(bio_err);
1012
1013 if (!SSL_CTX_set_default_verify_paths(ctx))
1014 ERR_print_errors(bio_err);
1015
1016 con = SSL_new(ctx);
1017 if (cfg.sess_in) {
1018 SSL_SESSION *sess;
1019 BIO *stmp = BIO_new_file(cfg.sess_in, "r");
1020 if (!stmp) {
1021 BIO_printf(bio_err, "Can't open session file %s\n",
1022 cfg.sess_in);
1023 ERR_print_errors(bio_err);
1024 goto end;
1025 }
1026 sess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
1027 BIO_free(stmp);
1028 if (!sess) {
1029 BIO_printf(bio_err, "Can't open session file %s\n",
1030 cfg.sess_in);
1031 ERR_print_errors(bio_err);
1032 goto end;
1033 }
1034 SSL_set_session(con, sess);
1035 SSL_SESSION_free(sess);
1036 }
1037
1038 /* Attempt to opportunistically use the host name for SNI. */
1039 servername = cfg.servername;
1040 if (servername == NULL)
1041 servername = cfg.host;
1042
1043 if (!cfg.no_servername && servername != NULL &&
1044 !SSL_set_tlsext_host_name(con, servername)) {
1045 long ssl_err = ERR_peek_error();
1046
1047 if (cfg.servername != NULL ||
1048 ERR_GET_LIB(ssl_err) != ERR_LIB_SSL ||
1049 ERR_GET_REASON(ssl_err) != SSL_R_SSL3_EXT_INVALID_SERVERNAME) {
1050 BIO_printf(bio_err,
1051 "Unable to set TLS servername extension.\n");
1052 ERR_print_errors(bio_err);
1053 goto end;
1054 }
1055 servername = NULL;
1056 ERR_clear_error();
1057 }
1058 if (!cfg.no_servername && servername != NULL) {
1059 tlsextcbp.biodebug = bio_err;
1060 SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
1061 SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
1062 }
1063
1064 re_start:
1065
1066 if (init_client(&s, cfg.host, cfg.port,
1067 cfg.socket_type, cfg.af) == 0) {
1068 BIO_printf(bio_err, "connect:errno=%d\n", errno);
1069 goto end;
1070 }
1071 BIO_printf(bio_c_out, "CONNECTED(%08X)\n", s);
1072
1073 if (cfg.nbio) {
1074 if (!cfg.quiet)
1075 BIO_printf(bio_c_out, "turning on non blocking io\n");
1076 if (!BIO_socket_nbio(s, 1)) {
1077 ERR_print_errors(bio_err);
1078 goto end;
1079 }
1080 }
1081
1082 if (SSL_is_dtls(con)) {
1083 sbio = BIO_new_dgram(s, BIO_NOCLOSE);
1084 if (getsockname(s, (struct sockaddr *)&peer,
1085 (void *)&peerlen) == -1) {
1086 BIO_printf(bio_err, "getsockname:errno=%d\n",
1087 errno);
1088 shutdown(s, SHUT_RD);
1089 close(s);
1090 goto end;
1091 }
1092 (void) BIO_ctrl_set_connected(sbio, 1, &peer);
1093
1094 if (cfg.enable_timeouts) {
1095 timeout.tv_sec = 0;
1096 timeout.tv_usec = DGRAM_RCV_TIMEOUT;
1097 BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0,
1098 &timeout);
1099
1100 timeout.tv_sec = 0;
1101 timeout.tv_usec = DGRAM_SND_TIMEOUT;
1102 BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0,
1103 &timeout);
1104 }
1105 if (cfg.socket_mtu > 28) {
1106 SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
1107 SSL_set_mtu(con, cfg.socket_mtu - 28);
1108 } else
1109 /* want to do MTU discovery */
1110 BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
1111 } else
1112 sbio = BIO_new_socket(s, BIO_NOCLOSE);
1113
1114 if (cfg.nbio_test) {
1115 BIO *test;
1116
1117 test = BIO_new(BIO_f_nbio_test());
1118 sbio = BIO_push(test, sbio);
1119 }
1120 if (cfg.debug) {
1121 BIO_set_callback(sbio, bio_dump_callback);
1122 BIO_set_callback_arg(sbio, (char *) bio_c_out);
1123 }
1124 if (cfg.msg) {
1125 SSL_set_msg_callback(con, msg_cb);
1126 SSL_set_msg_callback_arg(con, bio_c_out);
1127 }
1128 if (cfg.tlsextdebug) {
1129 SSL_set_tlsext_debug_callback(con, tlsext_cb);
1130 SSL_set_tlsext_debug_arg(con, bio_c_out);
1131 }
1132 if (cfg.status_req) {
1133 SSL_set_tlsext_status_type(con, TLSEXT_STATUSTYPE_ocsp);
1134 SSL_CTX_set_tlsext_status_cb(ctx, ocsp_resp_cb);
1135 SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
1136 }
1137
1138 SSL_set_bio(con, sbio, sbio);
1139 SSL_set_connect_state(con);
1140
1141 /* ok, lets connect */
1142 read_tty = 1;
1143 write_tty = 0;
1144 tty_on = 0;
1145 read_ssl = 1;
1146 write_ssl = 1;
1147
1148 cbuf_len = 0;
1149 cbuf_off = 0;
1150 sbuf_len = 0;
1151 sbuf_off = 0;
1152
1153 /* This is an ugly hack that does a lot of assumptions */
1154 /*
1155 * We do have to handle multi-line responses which may come in a
1156 * single packet or not. We therefore have to use BIO_gets() which
1157 * does need a buffering BIO. So during the initial chitchat we do
1158 * push a buffering BIO into the chain that is removed again later on
1159 * to not disturb the rest of the s_client operation.
1160 */
1161 if (cfg.starttls_proto == PROTO_SMTP ||
1162 cfg.starttls_proto == PROTO_LMTP) {
1163 int foundit = 0;
1164 BIO *fbio = BIO_new(BIO_f_buffer());
1165 BIO_push(fbio, sbio);
1166 /* wait for multi-line response to end from SMTP */
1167 do {
1168 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
1169 }
1170 while (mbuf_len > 3 && mbuf[3] == '-');
1171 /* STARTTLS command requires EHLO... */
1172 BIO_printf(fbio, "%cHLO openssl.client.net\r\n",
1173 cfg.starttls_proto == PROTO_SMTP ? 'E' : 'L');
1174 (void) BIO_flush(fbio);
1175 /* wait for multi-line response to end EHLO SMTP response */
1176 do {
1177 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
1178 if (strstr(mbuf, "STARTTLS"))
1179 foundit = 1;
1180 }
1181 while (mbuf_len > 3 && mbuf[3] == '-');
1182 (void) BIO_flush(fbio);
1183 BIO_pop(fbio);
1184 BIO_free(fbio);
1185 if (!foundit)
1186 BIO_printf(bio_err,
1187 "didn't find starttls in server response,"
1188 " try anyway...\n");
1189 BIO_printf(sbio, "STARTTLS\r\n");
1190 BIO_read(sbio, sbuf, BUFSIZZ);
1191 } else if (cfg.starttls_proto == PROTO_POP3) {
1192 mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
1193 if (mbuf_len == -1) {
1194 BIO_printf(bio_err, "BIO_read failed\n");
1195 goto end;
1196 }
1197 BIO_printf(sbio, "STLS\r\n");
1198 BIO_read(sbio, sbuf, BUFSIZZ);
1199 } else if (cfg.starttls_proto == PROTO_IMAP) {
1200 int foundit = 0;
1201 BIO *fbio = BIO_new(BIO_f_buffer());
1202 BIO_push(fbio, sbio);
1203 BIO_gets(fbio, mbuf, BUFSIZZ);
1204 /* STARTTLS command requires CAPABILITY... */
1205 BIO_printf(fbio, ". CAPABILITY\r\n");
1206 (void) BIO_flush(fbio);
1207 /* wait for multi-line CAPABILITY response */
1208 do {
1209 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
1210 if (strstr(mbuf, "STARTTLS"))
1211 foundit = 1;
1212 }
1213 while (mbuf_len > 3 && mbuf[0] != '.');
1214 (void) BIO_flush(fbio);
1215 BIO_pop(fbio);
1216 BIO_free(fbio);
1217 if (!foundit)
1218 BIO_printf(bio_err,
1219 "didn't find STARTTLS in server response,"
1220 " try anyway...\n");
1221 BIO_printf(sbio, ". STARTTLS\r\n");
1222 BIO_read(sbio, sbuf, BUFSIZZ);
1223 } else if (cfg.starttls_proto == PROTO_FTP) {
1224 BIO *fbio = BIO_new(BIO_f_buffer());
1225 BIO_push(fbio, sbio);
1226 /* wait for multi-line response to end from FTP */
1227 do {
1228 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
1229 }
1230 while (mbuf_len > 3 && mbuf[3] == '-');
1231 (void) BIO_flush(fbio);
1232 BIO_pop(fbio);
1233 BIO_free(fbio);
1234 BIO_printf(sbio, "AUTH TLS\r\n");
1235 BIO_read(sbio, sbuf, BUFSIZZ);
1236 } else if (cfg.starttls_proto == PROTO_XMPP) {
1237 int seen = 0;
1238 BIO_printf(sbio, "<stream:stream "
1239 "xmlns:stream='http://etherx.jabber.org/streams' "
1240 "xmlns='jabber:client' to='%s' version='1.0'>",
1241 cfg.xmpphost ?
1242 cfg.xmpphost : cfg.host);
1243 seen = BIO_read(sbio, mbuf, BUFSIZZ);
1244
1245 if (seen <= 0)
1246 goto shut;
1247
1248 mbuf[seen] = 0;
1249 while (!strstr(mbuf, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'") &&
1250 !strstr(mbuf, "<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\"")) {
1251 seen = BIO_read(sbio, mbuf, BUFSIZZ);
1252
1253 if (seen <= 0)
1254 goto shut;
1255
1256 mbuf[seen] = 0;
1257 }
1258 BIO_printf(sbio,
1259 "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
1260 seen = BIO_read(sbio, sbuf, BUFSIZZ);
1261 sbuf[seen] = 0;
1262 if (!strstr(sbuf, "<proceed"))
1263 goto shut;
1264 mbuf[0] = 0;
1265 } else if (cfg.proxy != NULL) {
1266 BIO_printf(sbio, "CONNECT %s HTTP/1.0\r\n\r\n",
1267 cfg.connect);
1268 mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
1269 if (mbuf_len == -1) {
1270 BIO_printf(bio_err, "BIO_read failed\n");
1271 goto end;
1272 }
1273 }
1274 for (;;) {
1275 struct pollfd pfd[3]; /* stdin, stdout, socket */
1276 int ptimeout = -1;
1277
1278 if (SSL_is_dtls(con) && DTLSv1_get_timeout(con, &timeout))
1279 ptimeout = timeout.tv_sec * 1000 +
1280 timeout.tv_usec / 1000;
1281
1282 if (SSL_in_init(con) && !SSL_total_renegotiations(con)) {
1283 in_init = 1;
1284 tty_on = 0;
1285 } else {
1286 tty_on = 1;
1287 if (in_init) {
1288 in_init = 0;
1289 if (cfg.sess_out) {
1290 BIO *stmp = BIO_new_file(
1291 cfg.sess_out, "w");
1292 if (stmp) {
1293 PEM_write_bio_SSL_SESSION(stmp,
1294 SSL_get_session(con));
1295 BIO_free(stmp);
1296 } else
1297 BIO_printf(bio_err,
1298 "Error writing session file %s\n",
1299 cfg.sess_out);
1300 }
1301 print_stuff(bio_c_out, con, full_log);
1302 if (full_log > 0)
1303 full_log--;
1304
1305 if (cfg.starttls_proto) {
1306 BIO_write(bio_err, mbuf, mbuf_len);
1307 /* We don't need to know any more */
1308 cfg.starttls_proto = PROTO_OFF;
1309 }
1310 if (cfg.reconnect) {
1311 cfg.reconnect--;
1312 BIO_printf(bio_c_out,
1313 "drop connection and then reconnect\n");
1314 SSL_shutdown(con);
1315 SSL_set_connect_state(con);
1316 shutdown(SSL_get_fd(con), SHUT_RD);
1317 close(SSL_get_fd(con));
1318 goto re_start;
1319 }
1320 }
1321 }
1322
1323 ssl_pending = read_ssl && SSL_pending(con);
1324
1325 pfd[0].fd = -1;
1326 pfd[1].fd = -1;
1327 if (!ssl_pending) {
1328 if (tty_on) {
1329 if (read_tty) {
1330 pfd[0].fd = fileno(stdin);
1331 pfd[0].events = POLLIN;
1332 }
1333 if (write_tty) {
1334 pfd[1].fd = fileno(stdout);
1335 pfd[1].events = POLLOUT;
1336 }
1337 }
1338
1339 pfd[2].fd = SSL_get_fd(con);
1340 pfd[2].events = 0;
1341 if (read_ssl)
1342 pfd[2].events |= POLLIN;
1343 if (write_ssl)
1344 pfd[2].events |= POLLOUT;
1345
1346/* printf("mode tty(%d %d%d) ssl(%d%d)\n",
1347 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
1348
1349 i = poll(pfd, 3, ptimeout);
1350 if (i == -1) {
1351 BIO_printf(bio_err, "bad select %d\n",
1352 errno);
1353 goto shut;
1354 /* goto end; */
1355 }
1356 }
1357 if (SSL_is_dtls(con) &&
1358 DTLSv1_handle_timeout(con) > 0)
1359 BIO_printf(bio_err, "TIMEOUT occured\n");
1360 if (!ssl_pending &&
1361 (pfd[2].revents & (POLLOUT|POLLERR|POLLNVAL))) {
1362 if (pfd[2].revents & (POLLERR|POLLNVAL)) {
1363 BIO_printf(bio_err, "poll error");
1364 goto shut;
1365 }
1366 k = SSL_write(con, &(cbuf[cbuf_off]),
1367 (unsigned int) cbuf_len);
1368 switch (SSL_get_error(con, k)) {
1369 case SSL_ERROR_NONE:
1370 cbuf_off += k;
1371 cbuf_len -= k;
1372 if (k <= 0)
1373 goto end;
1374 /* we have done a write(con,NULL,0); */
1375 if (cbuf_len <= 0) {
1376 read_tty = 1;
1377 write_ssl = 0;
1378 } else { /* if (cbuf_len > 0) */
1379 read_tty = 0;
1380 write_ssl = 1;
1381 }
1382 break;
1383 case SSL_ERROR_WANT_WRITE:
1384 BIO_printf(bio_c_out, "write W BLOCK\n");
1385 write_ssl = 1;
1386 read_tty = 0;
1387 break;
1388 case SSL_ERROR_WANT_READ:
1389 BIO_printf(bio_c_out, "write R BLOCK\n");
1390 write_tty = 0;
1391 read_ssl = 1;
1392 write_ssl = 0;
1393 break;
1394 case SSL_ERROR_WANT_X509_LOOKUP:
1395 BIO_printf(bio_c_out, "write X BLOCK\n");
1396 break;
1397 case SSL_ERROR_ZERO_RETURN:
1398 if (cbuf_len != 0) {
1399 BIO_printf(bio_c_out, "shutdown\n");
1400 ret = 0;
1401 goto shut;
1402 } else {
1403 read_tty = 1;
1404 write_ssl = 0;
1405 break;
1406 }
1407
1408 case SSL_ERROR_SYSCALL:
1409 if ((k != 0) || (cbuf_len != 0)) {
1410 BIO_printf(bio_err, "write:errno=%d\n",
1411 errno);
1412 goto shut;
1413 } else {
1414 read_tty = 1;
1415 write_ssl = 0;
1416 }
1417 break;
1418 case SSL_ERROR_SSL:
1419 ERR_print_errors(bio_err);
1420 goto shut;
1421 }
1422 } else if (!ssl_pending &&
1423 (pfd[1].revents & (POLLOUT|POLLERR|POLLNVAL))) {
1424 if (pfd[1].revents & (POLLERR|POLLNVAL)) {
1425 BIO_printf(bio_err, "poll error");
1426 goto shut;
1427 }
1428 i = write(fileno(stdout), &(sbuf[sbuf_off]), sbuf_len);
1429
1430 if (i <= 0) {
1431 BIO_printf(bio_c_out, "DONE\n");
1432 ret = 0;
1433 goto shut;
1434 /* goto end; */
1435 }
1436 sbuf_len -= i;
1437 sbuf_off += i;
1438 if (sbuf_len <= 0) {
1439 read_ssl = 1;
1440 write_tty = 0;
1441 }
1442 } else if (ssl_pending || (pfd[2].revents & (POLLIN|POLLHUP))) {
1443#ifdef RENEG
1444 {
1445 static int iiii;
1446 if (++iiii == 52) {
1447 SSL_renegotiate(con);
1448 iiii = 0;
1449 }
1450 }
1451#endif
1452 if (cfg.peekaboo) {
1453 k = p = SSL_peek(con, pbuf, 1024 /* BUFSIZZ */ );
1454 pending = SSL_pending(con);
1455 if (SSL_get_error(con, p) == SSL_ERROR_NONE) {
1456 if (p <= 0)
1457 goto end;
1458
1459 k = SSL_read(con, sbuf, p);
1460 }
1461 } else {
1462 k = SSL_read(con, sbuf, 1024 /* BUFSIZZ */ );
1463 }
1464
1465 switch (SSL_get_error(con, k)) {
1466 case SSL_ERROR_NONE:
1467 if (k <= 0)
1468 goto end;
1469 sbuf_off = 0;
1470 sbuf_len = k;
1471 if (cfg.peekaboo) {
1472 if (p != pending) {
1473 ret = -1;
1474 BIO_printf(bio_err,
1475 "peeked %d but pending %d!\n",
1476 p, pending);
1477 goto shut;
1478 }
1479 if (k < p) {
1480 ret = -1;
1481 BIO_printf(bio_err,
1482 "read less than peek!\n");
1483 goto shut;
1484 }
1485 if (p > 0 &&
1486 (memcmp(sbuf, pbuf, p) != 0)) {
1487 ret = -1;
1488 BIO_printf(bio_err,
1489 "peek of %d different from read of %d!\n",
1490 p, k);
1491 goto shut;
1492 }
1493 }
1494 read_ssl = 0;
1495 write_tty = 1;
1496 break;
1497 case SSL_ERROR_WANT_WRITE:
1498 BIO_printf(bio_c_out, "read W BLOCK\n");
1499 write_ssl = 1;
1500 read_tty = 0;
1501 break;
1502 case SSL_ERROR_WANT_READ:
1503 BIO_printf(bio_c_out, "read R BLOCK\n");
1504 write_tty = 0;
1505 read_ssl = 1;
1506 if ((read_tty == 0) && (write_ssl == 0))
1507 write_ssl = 1;
1508 break;
1509 case SSL_ERROR_WANT_X509_LOOKUP:
1510 BIO_printf(bio_c_out, "read X BLOCK\n");
1511 break;
1512 case SSL_ERROR_SYSCALL:
1513 ret = errno;
1514 BIO_printf(bio_err, "read:errno=%d\n", ret);
1515 goto shut;
1516 case SSL_ERROR_ZERO_RETURN:
1517 BIO_printf(bio_c_out, "closed\n");
1518 ret = 0;
1519 goto shut;
1520 case SSL_ERROR_SSL:
1521 ERR_print_errors(bio_err);
1522 goto shut;
1523 /* break; */
1524 }
1525 } else if (pfd[0].revents) {
1526 if (pfd[0].revents & (POLLERR|POLLNVAL)) {
1527 BIO_printf(bio_err, "poll error");
1528 goto shut;
1529 }
1530 if (cfg.crlf) {
1531 int j, lf_num;
1532
1533 i = read(fileno(stdin), cbuf, BUFSIZZ / 2);
1534 lf_num = 0;
1535 /* both loops are skipped when i <= 0 */
1536 for (j = 0; j < i; j++)
1537 if (cbuf[j] == '\n')
1538 lf_num++;
1539 for (j = i - 1; j >= 0; j--) {
1540 cbuf[j + lf_num] = cbuf[j];
1541 if (cbuf[j] == '\n') {
1542 lf_num--;
1543 i++;
1544 cbuf[j + lf_num] = '\r';
1545 }
1546 }
1547 assert(lf_num == 0);
1548 } else
1549 i = read(fileno(stdin), cbuf, BUFSIZZ);
1550
1551 if ((!cfg.ign_eof) &&
1552 ((i <= 0) || (cbuf[0] == 'Q'))) {
1553 BIO_printf(bio_err, "DONE\n");
1554 ret = 0;
1555 goto shut;
1556 }
1557 if ((!cfg.ign_eof) && (cbuf[0] == 'R')) {
1558 BIO_printf(bio_err, "RENEGOTIATING\n");
1559 SSL_renegotiate(con);
1560 cbuf_len = 0;
1561 } else {
1562 cbuf_len = i;
1563 cbuf_off = 0;
1564 }
1565
1566 write_ssl = 1;
1567 read_tty = 0;
1568 }
1569 }
1570
1571 ret = 0;
1572 shut:
1573 if (in_init)
1574 print_stuff(bio_c_out, con, full_log);
1575 SSL_shutdown(con);
1576 shutdown(SSL_get_fd(con), SHUT_RD);
1577 close(SSL_get_fd(con));
1578 end:
1579 if (con != NULL) {
1580 if (cfg.prexit != 0)
1581 print_stuff(bio_c_out, con, 1);
1582 SSL_free(con);
1583 }
1584 SSL_CTX_free(ctx);
1585 X509_free(cert);
1586 EVP_PKEY_free(key);
1587 free(pass);
1588 X509_VERIFY_PARAM_free(cfg.vpm);
1589 freezero(cbuf, BUFSIZZ);
1590 freezero(sbuf, BUFSIZZ);
1591 freezero(pbuf, BUFSIZZ);
1592 freezero(mbuf, BUFSIZZ);
1593 BIO_free(bio_c_out);
1594
1595 return (ret);
1596}
1597
1598static void
1599print_stuff(BIO *bio, SSL *s, int full)
1600{
1601 X509 *peer = NULL;
1602 char *p;
1603 static const char *space = " ";
1604 char buf[BUFSIZ];
1605 STACK_OF(X509) *sk;
1606 STACK_OF(X509_NAME) *sk2;
1607 const SSL_CIPHER *c;
1608 X509_NAME *xn;
1609 int j, i;
1610 unsigned char *exportedkeymat;
1611
1612 if (full) {
1613 int got_a_chain = 0;
1614
1615 sk = SSL_get_peer_cert_chain(s);
1616 if (sk != NULL) {
1617 got_a_chain = 1; /* we don't have it for SSL2
1618 * (yet) */
1619
1620 BIO_printf(bio, "---\nCertificate chain\n");
1621 for (i = 0; i < sk_X509_num(sk); i++) {
1622 X509_NAME_oneline(X509_get_subject_name(
1623 sk_X509_value(sk, i)), buf, sizeof buf);
1624 BIO_printf(bio, "%2d s:%s\n", i, buf);
1625 X509_NAME_oneline(X509_get_issuer_name(
1626 sk_X509_value(sk, i)), buf, sizeof buf);
1627 BIO_printf(bio, " i:%s\n", buf);
1628 if (cfg.showcerts)
1629 PEM_write_bio_X509(bio,
1630 sk_X509_value(sk, i));
1631 }
1632 }
1633 BIO_printf(bio, "---\n");
1634 peer = SSL_get_peer_certificate(s);
1635 if (peer != NULL) {
1636 BIO_printf(bio, "Server certificate\n");
1637 if (!(cfg.showcerts && got_a_chain)) {
1638 /* Redundant if we showed the whole chain */
1639 PEM_write_bio_X509(bio, peer);
1640 }
1641 X509_NAME_oneline(X509_get_subject_name(peer),
1642 buf, sizeof buf);
1643 BIO_printf(bio, "subject=%s\n", buf);
1644 X509_NAME_oneline(X509_get_issuer_name(peer),
1645 buf, sizeof buf);
1646 BIO_printf(bio, "issuer=%s\n", buf);
1647 } else
1648 BIO_printf(bio, "no peer certificate available\n");
1649
1650 sk2 = SSL_get_client_CA_list(s);
1651 if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0)) {
1652 BIO_printf(bio,
1653 "---\nAcceptable client certificate CA names\n");
1654 for (i = 0; i < sk_X509_NAME_num(sk2); i++) {
1655 xn = sk_X509_NAME_value(sk2, i);
1656 X509_NAME_oneline(xn, buf, sizeof(buf));
1657 BIO_write(bio, buf, strlen(buf));
1658 BIO_write(bio, "\n", 1);
1659 }
1660 } else {
1661 BIO_printf(bio,
1662 "---\nNo client certificate CA names sent\n");
1663 }
1664 p = SSL_get_shared_ciphers(s, buf, sizeof buf);
1665 if (p != NULL) {
1666 /*
1667 * This works only for SSL 2. In later protocol
1668 * versions, the client does not know what other
1669 * ciphers (in addition to the one to be used in the
1670 * current connection) the server supports.
1671 */
1672
1673 BIO_printf(bio,
1674 "---\nCiphers common between both SSL endpoints:\n");
1675 j = i = 0;
1676 while (*p) {
1677 if (*p == ':') {
1678 BIO_write(bio, space, 15 - j % 25);
1679 i++;
1680 j = 0;
1681 BIO_write(bio,
1682 ((i % 3) ? " " : "\n"), 1);
1683 } else {
1684 BIO_write(bio, p, 1);
1685 j++;
1686 }
1687 p++;
1688 }
1689 BIO_write(bio, "\n", 1);
1690 }
1691
1692 ssl_print_tmp_key(bio, s);
1693
1694 BIO_printf(bio,
1695 "---\nSSL handshake has read %ld bytes and written %ld bytes\n",
1696 BIO_number_read(SSL_get_rbio(s)),
1697 BIO_number_written(SSL_get_wbio(s)));
1698 }
1699 BIO_printf(bio, (SSL_cache_hit(s) ? "---\nReused, " : "---\nNew, "));
1700 c = SSL_get_current_cipher(s);
1701 BIO_printf(bio, "%s, Cipher is %s\n",
1702 SSL_CIPHER_get_version(c),
1703 SSL_CIPHER_get_name(c));
1704 if (peer != NULL) {
1705 EVP_PKEY *pktmp;
1706
1707 pktmp = X509_get0_pubkey(peer);
1708 BIO_printf(bio, "Server public key is %d bit\n",
1709 EVP_PKEY_bits(pktmp));
1710 }
1711 BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
1712 SSL_get_secure_renegotiation_support(s) ? "" : " NOT");
1713
1714 /* Compression is not supported and will always be none. */
1715 BIO_printf(bio, "Compression: NONE\n");
1716 BIO_printf(bio, "Expansion: NONE\n");
1717
1718#ifdef SSL_DEBUG
1719 {
1720 /* Print out local port of connection: useful for debugging */
1721 int sock;
1722 struct sockaddr_in ladd;
1723 socklen_t ladd_size = sizeof(ladd);
1724 sock = SSL_get_fd(s);
1725 getsockname(sock, (struct sockaddr *) & ladd, &ladd_size);
1726 BIO_printf(bio, "LOCAL PORT is %u\n",
1727 ntohs(ladd.sin_port));
1728 }
1729#endif
1730
1731 {
1732 const unsigned char *proto;
1733 unsigned int proto_len;
1734 SSL_get0_alpn_selected(s, &proto, &proto_len);
1735 if (proto_len > 0) {
1736 BIO_printf(bio, "ALPN protocol: ");
1737 BIO_write(bio, proto, proto_len);
1738 BIO_write(bio, "\n", 1);
1739 } else
1740 BIO_printf(bio, "No ALPN negotiated\n");
1741 }
1742
1743#ifndef OPENSSL_NO_SRTP
1744 {
1745 SRTP_PROTECTION_PROFILE *srtp_profile;
1746
1747 srtp_profile = SSL_get_selected_srtp_profile(s);
1748 if (srtp_profile)
1749 BIO_printf(bio,
1750 "SRTP Extension negotiated, profile=%s\n",
1751 srtp_profile->name);
1752 }
1753#endif
1754
1755 SSL_SESSION_print(bio, SSL_get_session(s));
1756 if (cfg.keymatexportlabel != NULL) {
1757 BIO_printf(bio, "Keying material exporter:\n");
1758 BIO_printf(bio, " Label: '%s'\n",
1759 cfg.keymatexportlabel);
1760 BIO_printf(bio, " Length: %i bytes\n",
1761 cfg.keymatexportlen);
1762 exportedkeymat = malloc(cfg.keymatexportlen);
1763 if (exportedkeymat != NULL) {
1764 if (!SSL_export_keying_material(s, exportedkeymat,
1765 cfg.keymatexportlen,
1766 cfg.keymatexportlabel,
1767 strlen(cfg.keymatexportlabel),
1768 NULL, 0, 0)) {
1769 BIO_printf(bio, " Error\n");
1770 } else {
1771 BIO_printf(bio, " Keying material: ");
1772 for (i = 0; i < cfg.keymatexportlen; i++)
1773 BIO_printf(bio, "%02X",
1774 exportedkeymat[i]);
1775 BIO_printf(bio, "\n");
1776 }
1777 free(exportedkeymat);
1778 }
1779 }
1780 BIO_printf(bio, "---\n");
1781 X509_free(peer);
1782 /* flush, or debugging output gets mixed with http response */
1783 (void) BIO_flush(bio);
1784}
1785
1786static int
1787ocsp_resp_cb(SSL *s, void *arg)
1788{
1789 const unsigned char *p;
1790 int len;
1791 OCSP_RESPONSE *rsp;
1792 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
1793 BIO_puts(arg, "OCSP response: ");
1794 if (!p) {
1795 BIO_puts(arg, "no response sent\n");
1796 return 1;
1797 }
1798 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
1799 if (!rsp) {
1800 BIO_puts(arg, "response parse error\n");
1801 BIO_dump_indent(arg, (char *) p, len, 4);
1802 return 0;
1803 }
1804 BIO_puts(arg, "\n======================================\n");
1805 OCSP_RESPONSE_print(arg, rsp, 0);
1806 BIO_puts(arg, "======================================\n");
1807 OCSP_RESPONSE_free(rsp);
1808 return 1;
1809}
1810
1811static int
1812ssl_servername_cb(SSL *s, int *ad, void *arg)
1813{
1814 tlsextctx *p = (tlsextctx *) arg;
1815 const char *hn = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
1816 if (SSL_get_servername_type(s) != -1)
1817 p->ack = !SSL_session_reused(s) && hn != NULL;
1818 else
1819 BIO_printf(bio_err, "Can't use SSL_get_servername\n");
1820
1821 return SSL_TLSEXT_ERR_OK;
1822}
1823
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-09 02:55:08 +0000