1 /* $OpenBSD: s_cb.c,v 1.21 2023/04/14 15:27:13 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 #include <sys/socket.h>
113
114 #include <netinet/in.h>
115
116 #include <netdb.h>
117 #include <stdio.h>
118 #include <stdlib.h>
119 #include <string.h>
120
121 #include "apps.h"
122
123 #include <openssl/err.h>
124 #include <openssl/ssl.h>
125 #include <openssl/x509.h>
126
127 #include "s_apps.h"
128
129 #define COOKIE_SECRET_LENGTH 16
130
131 int verify_depth = 0;
132 int verify_return_error = 0;
133 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
134 int cookie_initialized = 0;
135
136 int
verify_callback(int ok,X509_STORE_CTX * ctx)137 verify_callback(int ok, X509_STORE_CTX * ctx)
138 {
139 X509 *err_cert;
140 int err, depth;
141
142 err_cert = X509_STORE_CTX_get_current_cert(ctx);
143 err = X509_STORE_CTX_get_error(ctx);
144 depth = X509_STORE_CTX_get_error_depth(ctx);
145
146 BIO_printf(bio_err, "depth=%d ", depth);
147 if (err_cert) {
148 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
149 0, XN_FLAG_ONELINE);
150 BIO_puts(bio_err, "\n");
151 } else
152 BIO_puts(bio_err, "<no cert>\n");
153 if (!ok) {
154 BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
155 X509_verify_cert_error_string(err));
156 if (verify_depth >= depth) {
157 if (!verify_return_error)
158 ok = 1;
159 } else {
160 ok = 0;
161 }
162 }
163 switch (err) {
164 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
165 BIO_puts(bio_err, "issuer= ");
166 if (err_cert == NULL)
167 BIO_puts(bio_err, "<error getting cert>");
168 else
169 X509_NAME_print_ex(bio_err,
170 X509_get_issuer_name(err_cert), 0, XN_FLAG_ONELINE);
171 BIO_puts(bio_err, "\n");
172 break;
173 case X509_V_ERR_CERT_NOT_YET_VALID:
174 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
175 BIO_printf(bio_err, "notBefore=");
176 if (err_cert == NULL)
177 BIO_printf(bio_err, " <error getting cert>");
178 else
179 ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
180 BIO_printf(bio_err, "\n");
181 break;
182 case X509_V_ERR_CERT_HAS_EXPIRED:
183 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
184 BIO_printf(bio_err, "notAfter=");
185 if (err_cert == NULL)
186 BIO_printf(bio_err, " <error getting cert>");
187 else
188 ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
189 BIO_printf(bio_err, "\n");
190 break;
191 case X509_V_ERR_NO_EXPLICIT_POLICY:
192 break;
193 }
194
195 BIO_printf(bio_err, "verify return:%d\n", ok);
196 return (ok);
197 }
198
199 int
set_cert_stuff(SSL_CTX * ctx,char * cert_file,char * key_file)200 set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
201 {
202 if (cert_file == NULL)
203 return 1;
204
205 if (key_file == NULL)
206 key_file = cert_file;
207
208 if (SSL_CTX_use_certificate_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0) {
209 BIO_printf(bio_err,
210 "unable to get certificate from '%s'\n", cert_file);
211 ERR_print_errors(bio_err);
212 return 0;
213 }
214 if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
215 BIO_printf(bio_err, "unable to get private key from '%s'\n",
216 key_file);
217 ERR_print_errors(bio_err);
218 return 0;
219 }
220
221 /* Now we know that a key and cert have been set against the context. */
222 if (!SSL_CTX_check_private_key(ctx)) {
223 BIO_printf(bio_err,
224 "Private key does not match the certificate public key\n");
225 return 0;
226 }
227
228 return 1;
229 }
230
231 int
set_cert_key_stuff(SSL_CTX * ctx,X509 * cert,EVP_PKEY * key)232 set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
233 {
234 if (cert == NULL)
235 return 1;
236 if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
237 BIO_printf(bio_err, "error setting certificate\n");
238 ERR_print_errors(bio_err);
239 return 0;
240 }
241 if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
242 BIO_printf(bio_err, "error setting private key\n");
243 ERR_print_errors(bio_err);
244 return 0;
245 }
246 /*
247 * Now we know that a key and cert have been set against the SSL
248 * context
249 */
250 if (!SSL_CTX_check_private_key(ctx)) {
251 BIO_printf(bio_err,
252 "Private key does not match the certificate public key\n");
253 return 0;
254 }
255 return 1;
256 }
257
258 int
ssl_print_tmp_key(BIO * out,SSL * s)259 ssl_print_tmp_key(BIO *out, SSL *s)
260 {
261 const char *cname;
262 EVP_PKEY *pkey;
263 EC_KEY *ec;
264 const EC_GROUP *group;
265 int nid;
266
267 if (!SSL_get_server_tmp_key(s, &pkey))
268 return 0;
269
270 BIO_puts(out, "Server Temp Key: ");
271 switch (EVP_PKEY_id(pkey)) {
272 case EVP_PKEY_DH:
273 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(pkey));
274 break;
275
276 case EVP_PKEY_EC:
277 if ((ec = EVP_PKEY_get0_EC_KEY(pkey)) == NULL)
278 goto err;
279 if ((group = EC_KEY_get0_group(ec)) == NULL)
280 goto err;
281
282 nid = EC_GROUP_get_curve_name(group);
283
284 if ((cname = EC_curve_nid2nist(nid)) == NULL)
285 cname = OBJ_nid2sn(nid);
286
287 BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(pkey));
288 break;
289
290 default:
291 BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(pkey)),
292 EVP_PKEY_bits(pkey));
293 }
294
295 err:
296 EVP_PKEY_free(pkey);
297 return 1;
298 }
299
300 long
bio_dump_callback(BIO * bio,int cmd,const char * argp,int argi,long argl,long ret)301 bio_dump_callback(BIO * bio, int cmd, const char *argp,
302 int argi, long argl, long ret)
303 {
304 BIO *out;
305
306 out = (BIO *) BIO_get_callback_arg(bio);
307 if (out == NULL)
308 return (ret);
309
310 if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
311 BIO_printf(out,
312 "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
313 (void *) bio, argp, (unsigned long) argi, ret, ret);
314 BIO_dump(out, argp, (int) ret);
315 return (ret);
316 } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
317 BIO_printf(out,
318 "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
319 (void *) bio, argp, (unsigned long) argi, ret, ret);
320 BIO_dump(out, argp, (int) ret);
321 }
322 return (ret);
323 }
324
325 void
apps_ssl_info_callback(const SSL * s,int where,int ret)326 apps_ssl_info_callback(const SSL * s, int where, int ret)
327 {
328 const char *str;
329 int w;
330
331 w = where & ~SSL_ST_MASK;
332
333 if (w & SSL_ST_CONNECT)
334 str = "SSL_connect";
335 else if (w & SSL_ST_ACCEPT)
336 str = "SSL_accept";
337 else
338 str = "undefined";
339
340 if (where & SSL_CB_LOOP) {
341 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
342 } else if (where & SSL_CB_ALERT) {
343 str = (where & SSL_CB_READ) ? "read" : "write";
344 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
345 SSL_alert_type_string_long(ret),
346 SSL_alert_desc_string_long(ret));
347 } else if (where & SSL_CB_EXIT) {
348 if (ret == 0)
349 BIO_printf(bio_err, "%s:failed in %s\n",
350 str, SSL_state_string_long(s));
351 else if (ret < 0) {
352 BIO_printf(bio_err, "%s:error in %s\n",
353 str, SSL_state_string_long(s));
354 }
355 }
356 }
357
358
359 void
msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)360 msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
361 {
362 BIO *bio = arg;
363 const char *str_write_p, *str_version, *str_content_type = "",
364 *str_details1 = "", *str_details2 = "";
365
366 str_write_p = write_p ? ">>>" : "<<<";
367
368 /* XXX convert to using ssl_get_version */
369 switch (version) {
370 case SSL2_VERSION:
371 str_version = "SSL 2.0";
372 break;
373 case SSL3_VERSION:
374 str_version = "SSL 3.0 ";
375 break;
376 case TLS1_VERSION:
377 str_version = "TLS 1.0 ";
378 break;
379 case TLS1_1_VERSION:
380 str_version = "TLS 1.1 ";
381 break;
382 case TLS1_2_VERSION:
383 str_version = "TLS 1.2 ";
384 break;
385 case TLS1_3_VERSION:
386 str_version = "TLS 1.3 ";
387 break;
388 case DTLS1_VERSION:
389 str_version = "DTLS 1.0 ";
390 break;
391 case DTLS1_2_VERSION:
392 str_version = "DTLS 1.2 ";
393 break;
394 default:
395 str_version = "???";
396 }
397
398 if (version == SSL2_VERSION) {
399 str_details1 = "???";
400
401 if (len > 0) {
402 /* XXX magic numbers */
403 switch (((const unsigned char *) buf)[0]) {
404 case 0:
405 str_details1 = ", ERROR:";
406 str_details2 = " ???";
407 if (len >= 3) {
408 unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
409
410 switch (err) {
411 case 0x0001:
412 str_details2 = " NO-CIPHER-ERROR";
413 break;
414 case 0x0002:
415 str_details2 = " NO-CERTIFICATE-ERROR";
416 break;
417 case 0x0004:
418 str_details2 = " BAD-CERTIFICATE-ERROR";
419 break;
420 case 0x0006:
421 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
422 break;
423 }
424 }
425 break;
426 case 1:
427 str_details1 = ", CLIENT-HELLO";
428 break;
429 case 2:
430 str_details1 = ", CLIENT-MASTER-KEY";
431 break;
432 case 3:
433 str_details1 = ", CLIENT-FINISHED";
434 break;
435 case 4:
436 str_details1 = ", SERVER-HELLO";
437 break;
438 case 5:
439 str_details1 = ", SERVER-VERIFY";
440 break;
441 case 6:
442 str_details1 = ", SERVER-FINISHED";
443 break;
444 case 7:
445 str_details1 = ", REQUEST-CERTIFICATE";
446 break;
447 case 8:
448 str_details1 = ", CLIENT-CERTIFICATE";
449 break;
450 }
451 }
452 }
453 if (version == SSL3_VERSION || version == TLS1_VERSION ||
454 version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
455 version == TLS1_3_VERSION || version == DTLS1_VERSION ||
456 version == DTLS1_2_VERSION) {
457 /* XXX magic numbers are in ssl3.h */
458 switch (content_type) {
459 case 20:
460 str_content_type = "ChangeCipherSpec";
461 break;
462 case 21:
463 str_content_type = "Alert";
464 break;
465 case 22:
466 str_content_type = "Handshake";
467 break;
468 }
469
470 if (content_type == 21) { /* Alert */
471 str_details1 = ", ???";
472
473 if (len == 2) {
474 switch (((const unsigned char *) buf)[0]) {
475 case 1:
476 str_details1 = ", warning";
477 break;
478 case 2:
479 str_details1 = ", fatal";
480 break;
481 }
482
483 str_details2 = " ???";
484 switch (((const unsigned char *) buf)[1]) {
485 case 0:
486 str_details2 = " close_notify";
487 break;
488 case 10:
489 str_details2 = " unexpected_message";
490 break;
491 case 20:
492 str_details2 = " bad_record_mac";
493 break;
494 case 21:
495 str_details2 = " decryption_failed";
496 break;
497 case 22:
498 str_details2 = " record_overflow";
499 break;
500 case 30:
501 str_details2 = " decompression_failure";
502 break;
503 case 40:
504 str_details2 = " handshake_failure";
505 break;
506 case 42:
507 str_details2 = " bad_certificate";
508 break;
509 case 43:
510 str_details2 = " unsupported_certificate";
511 break;
512 case 44:
513 str_details2 = " certificate_revoked";
514 break;
515 case 45:
516 str_details2 = " certificate_expired";
517 break;
518 case 46:
519 str_details2 = " certificate_unknown";
520 break;
521 case 47:
522 str_details2 = " illegal_parameter";
523 break;
524 case 48:
525 str_details2 = " unknown_ca";
526 break;
527 case 49:
528 str_details2 = " access_denied";
529 break;
530 case 50:
531 str_details2 = " decode_error";
532 break;
533 case 51:
534 str_details2 = " decrypt_error";
535 break;
536 case 60:
537 str_details2 = " export_restriction";
538 break;
539 case 70:
540 str_details2 = " protocol_version";
541 break;
542 case 71:
543 str_details2 = " insufficient_security";
544 break;
545 case 80:
546 str_details2 = " internal_error";
547 break;
548 case 90:
549 str_details2 = " user_canceled";
550 break;
551 case 100:
552 str_details2 = " no_renegotiation";
553 break;
554 case 110:
555 str_details2 = " unsupported_extension";
556 break;
557 case 111:
558 str_details2 = " certificate_unobtainable";
559 break;
560 case 112:
561 str_details2 = " unrecognized_name";
562 break;
563 case 113:
564 str_details2 = " bad_certificate_status_response";
565 break;
566 case 114:
567 str_details2 = " bad_certificate_hash_value";
568 break;
569 case 115:
570 str_details2 = " unknown_psk_identity";
571 break;
572 }
573 }
574 }
575 if (content_type == 22) { /* Handshake */
576 str_details1 = "???";
577
578 if (len > 0) {
579 switch (((const unsigned char *) buf)[0]) {
580 case 0:
581 str_details1 = ", HelloRequest";
582 break;
583 case 1:
584 str_details1 = ", ClientHello";
585 break;
586 case 2:
587 str_details1 = ", ServerHello";
588 break;
589 case 3:
590 str_details1 = ", HelloVerifyRequest";
591 break;
592 case 4:
593 str_details1 = ", NewSessionTicket";
594 break;
595 case 5:
596 str_details1 = ", EndOfEarlyData";
597 break;
598 case 8:
599 str_details1 = ", EncryptedExtensions";
600 break;
601 case 11:
602 str_details1 = ", Certificate";
603 break;
604 case 12:
605 str_details1 = ", ServerKeyExchange";
606 break;
607 case 13:
608 str_details1 = ", CertificateRequest";
609 break;
610 case 14:
611 str_details1 = ", ServerHelloDone";
612 break;
613 case 15:
614 str_details1 = ", CertificateVerify";
615 break;
616 case 16:
617 str_details1 = ", ClientKeyExchange";
618 break;
619 case 20:
620 str_details1 = ", Finished";
621 break;
622 case 24:
623 str_details1 = ", KeyUpdate";
624 break;
625 }
626 }
627 }
628 }
629 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
630 str_version, str_content_type, (unsigned long) len,
631 str_details1, str_details2);
632
633 if (len > 0) {
634 size_t num, i;
635
636 BIO_printf(bio, " ");
637 num = len;
638
639 for (i = 0; i < num; i++) {
640 if (i % 16 == 0 && i > 0)
641 BIO_printf(bio, "\n ");
642 BIO_printf(bio, " %02x",
643 ((const unsigned char *) buf)[i]);
644 }
645 if (i < len)
646 BIO_printf(bio, " ...");
647 BIO_printf(bio, "\n");
648 }
649 (void) BIO_flush(bio);
650 }
651
652 void
tlsext_cb(SSL * s,int client_server,int type,unsigned char * data,int len,void * arg)653 tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
654 void *arg)
655 {
656 BIO *bio = arg;
657 char *extname;
658
659 switch (type) {
660 case TLSEXT_TYPE_server_name:
661 extname = "server name";
662 break;
663
664 case TLSEXT_TYPE_max_fragment_length:
665 extname = "max fragment length";
666 break;
667
668 case TLSEXT_TYPE_client_certificate_url:
669 extname = "client certificate URL";
670 break;
671
672 case TLSEXT_TYPE_trusted_ca_keys:
673 extname = "trusted CA keys";
674 break;
675
676 case TLSEXT_TYPE_truncated_hmac:
677 extname = "truncated HMAC";
678 break;
679
680 case TLSEXT_TYPE_status_request:
681 extname = "status request";
682 break;
683
684 case TLSEXT_TYPE_user_mapping:
685 extname = "user mapping";
686 break;
687
688 case TLSEXT_TYPE_client_authz:
689 extname = "client authz";
690 break;
691
692 case TLSEXT_TYPE_server_authz:
693 extname = "server authz";
694 break;
695
696 case TLSEXT_TYPE_cert_type:
697 extname = "cert type";
698 break;
699
700 case TLSEXT_TYPE_supported_groups:
701 extname = "supported groups";
702 break;
703
704 case TLSEXT_TYPE_ec_point_formats:
705 extname = "EC point formats";
706 break;
707
708 case TLSEXT_TYPE_srp:
709 extname = "SRP";
710 break;
711
712 case TLSEXT_TYPE_signature_algorithms:
713 extname = "signature algorithms";
714 break;
715
716 case TLSEXT_TYPE_use_srtp:
717 extname = "use SRTP";
718 break;
719
720 case TLSEXT_TYPE_heartbeat:
721 extname = "heartbeat";
722 break;
723
724 case TLSEXT_TYPE_application_layer_protocol_negotiation:
725 extname = "application layer protocol negotiation";
726 break;
727
728 case TLSEXT_TYPE_padding:
729 extname = "TLS padding";
730 break;
731
732 case TLSEXT_TYPE_session_ticket:
733 extname = "session ticket";
734 break;
735
736 #if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
737 case TLSEXT_TYPE_pre_shared_key:
738 extname = "pre shared key";
739 break;
740
741 case TLSEXT_TYPE_early_data:
742 extname = "early data";
743 break;
744
745 case TLSEXT_TYPE_supported_versions:
746 extname = "supported versions";
747 break;
748
749 case TLSEXT_TYPE_cookie:
750 extname = "cookie";
751 break;
752
753 case TLSEXT_TYPE_psk_key_exchange_modes:
754 extname = "PSK key exchange modes";
755 break;
756
757 case TLSEXT_TYPE_certificate_authorities:
758 extname = "certificate authorities";
759 break;
760
761 case TLSEXT_TYPE_oid_filters:
762 extname = "OID filters";
763 break;
764
765 case TLSEXT_TYPE_post_handshake_auth:
766 extname = "post handshake auth";
767 break;
768
769 case TLSEXT_TYPE_signature_algorithms_cert:
770 extname = "signature algorithms cert";
771 break;
772
773 case TLSEXT_TYPE_key_share:
774 extname = "key share";
775 break;
776 #endif
777
778 case TLSEXT_TYPE_renegotiate:
779 extname = "renegotiation info";
780 break;
781
782 default:
783 extname = "unknown";
784 break;
785
786 }
787
788 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
789 client_server ? "server" : "client", extname, type, len);
790 BIO_dump(bio, (char *) data, len);
791 (void) BIO_flush(bio);
792 }
793
794 int
generate_cookie_callback(SSL * ssl,unsigned char * cookie,unsigned int * cookie_len)795 generate_cookie_callback(SSL * ssl, unsigned char *cookie,
796 unsigned int *cookie_len)
797 {
798 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
799 unsigned int length, resultlength;
800 union {
801 struct sockaddr sa;
802 struct sockaddr_in s4;
803 struct sockaddr_in6 s6;
804 } peer;
805
806 /* Initialize a random secret */
807 if (!cookie_initialized) {
808 arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
809 cookie_initialized = 1;
810 }
811 /* Read peer information */
812 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
813
814 /* Create buffer with peer's address and port */
815 length = 0;
816 switch (peer.sa.sa_family) {
817 case AF_INET:
818 length += sizeof(struct in_addr);
819 length += sizeof(peer.s4.sin_port);
820 break;
821 case AF_INET6:
822 length += sizeof(struct in6_addr);
823 length += sizeof(peer.s6.sin6_port);
824 break;
825 default:
826 OPENSSL_assert(0);
827 break;
828 }
829 buffer = malloc(length);
830
831 if (buffer == NULL) {
832 BIO_printf(bio_err, "out of memory\n");
833 return 0;
834 }
835 switch (peer.sa.sa_family) {
836 case AF_INET:
837 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
838 memcpy(buffer + sizeof(peer.s4.sin_port),
839 &peer.s4.sin_addr, sizeof(struct in_addr));
840 break;
841 case AF_INET6:
842 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
843 memcpy(buffer + sizeof(peer.s6.sin6_port),
844 &peer.s6.sin6_addr, sizeof(struct in6_addr));
845 break;
846 default:
847 OPENSSL_assert(0);
848 break;
849 }
850
851 /* Calculate HMAC of buffer using the secret */
852 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
853 buffer, length, result, &resultlength);
854 free(buffer);
855
856 memcpy(cookie, result, resultlength);
857 *cookie_len = resultlength;
858
859 return 1;
860 }
861
862 int
verify_cookie_callback(SSL * ssl,const unsigned char * cookie,unsigned int cookie_len)863 verify_cookie_callback(SSL * ssl, const unsigned char *cookie,
864 unsigned int cookie_len)
865 {
866 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
867 unsigned int length, resultlength;
868 union {
869 struct sockaddr sa;
870 struct sockaddr_in s4;
871 struct sockaddr_in6 s6;
872 } peer;
873
874 /* If secret isn't initialized yet, the cookie can't be valid */
875 if (!cookie_initialized)
876 return 0;
877
878 /* Read peer information */
879 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
880
881 /* Create buffer with peer's address and port */
882 length = 0;
883 switch (peer.sa.sa_family) {
884 case AF_INET:
885 length += sizeof(struct in_addr);
886 length += sizeof(peer.s4.sin_port);
887 break;
888 case AF_INET6:
889 length += sizeof(struct in6_addr);
890 length += sizeof(peer.s6.sin6_port);
891 break;
892 default:
893 OPENSSL_assert(0);
894 break;
895 }
896 buffer = malloc(length);
897
898 if (buffer == NULL) {
899 BIO_printf(bio_err, "out of memory\n");
900 return 0;
901 }
902 switch (peer.sa.sa_family) {
903 case AF_INET:
904 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
905 memcpy(buffer + sizeof(peer.s4.sin_port),
906 &peer.s4.sin_addr, sizeof(struct in_addr));
907 break;
908 case AF_INET6:
909 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
910 memcpy(buffer + sizeof(peer.s6.sin6_port),
911 &peer.s6.sin6_addr, sizeof(struct in6_addr));
912 break;
913 default:
914 OPENSSL_assert(0);
915 break;
916 }
917
918 /* Calculate HMAC of buffer using the secret */
919 if (HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
920 buffer, length, result, &resultlength) == NULL) {
921 free(buffer);
922 return 0;
923 }
924
925 free(buffer);
926
927 if (cookie_len == resultlength &&
928 memcmp(result, cookie, resultlength) == 0)
929 return 1;
930
931 return 0;
932 }
933