1 /* $OpenBSD: s_cb.c,v 1.15 2021/04/02 10:19:19 inoguchi 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 policies_print(bio_err, ctx);
193 break;
194 }
195 if (err == X509_V_OK && ok == 2)
196 policies_print(bio_err, ctx);
197
198 BIO_printf(bio_err, "verify return:%d\n", ok);
199 return (ok);
200 }
201
202 int
set_cert_stuff(SSL_CTX * ctx,char * cert_file,char * key_file)203 set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
204 {
205 if (cert_file != NULL) {
206 /*
207 SSL *ssl;
208 X509 *x509;
209 */
210
211 if (SSL_CTX_use_certificate_file(ctx, cert_file,
212 SSL_FILETYPE_PEM) <= 0) {
213 BIO_printf(bio_err,
214 "unable to get certificate from '%s'\n", cert_file);
215 ERR_print_errors(bio_err);
216 return (0);
217 }
218 if (key_file == NULL)
219 key_file = cert_file;
220 if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
221 SSL_FILETYPE_PEM) <= 0) {
222 BIO_printf(bio_err,
223 "unable to get private key from '%s'\n", key_file);
224 ERR_print_errors(bio_err);
225 return (0);
226 }
227 /*
228 In theory this is no longer needed
229 ssl=SSL_new(ctx);
230 x509=SSL_get_certificate(ssl);
231
232 if (x509 != NULL) {
233 EVP_PKEY *pktmp;
234 pktmp = X509_get_pubkey(x509);
235 EVP_PKEY_copy_parameters(pktmp,
236 SSL_get_privatekey(ssl));
237 EVP_PKEY_free(pktmp);
238 }
239 SSL_free(ssl);
240 */
241
242 /*
243 * If we are using DSA, we can copy the parameters from the
244 * private key
245 */
246
247
248 /*
249 * Now we know that a key and cert have been set against the
250 * SSL context
251 */
252 if (!SSL_CTX_check_private_key(ctx)) {
253 BIO_printf(bio_err,
254 "Private key does not match the certificate public key\n");
255 return (0);
256 }
257 }
258 return (1);
259 }
260
261 int
set_cert_key_stuff(SSL_CTX * ctx,X509 * cert,EVP_PKEY * key)262 set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
263 {
264 if (cert == NULL)
265 return 1;
266 if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
267 BIO_printf(bio_err, "error setting certificate\n");
268 ERR_print_errors(bio_err);
269 return 0;
270 }
271 if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
272 BIO_printf(bio_err, "error setting private key\n");
273 ERR_print_errors(bio_err);
274 return 0;
275 }
276 /*
277 * Now we know that a key and cert have been set against the SSL
278 * context
279 */
280 if (!SSL_CTX_check_private_key(ctx)) {
281 BIO_printf(bio_err,
282 "Private key does not match the certificate public key\n");
283 return 0;
284 }
285 return 1;
286 }
287
288 int
ssl_print_tmp_key(BIO * out,SSL * s)289 ssl_print_tmp_key(BIO *out, SSL *s)
290 {
291 const char *cname;
292 EVP_PKEY *pkey;
293 EC_KEY *ec;
294 int nid;
295
296 if (!SSL_get_server_tmp_key(s, &pkey))
297 return 0;
298
299 BIO_puts(out, "Server Temp Key: ");
300 switch (EVP_PKEY_id(pkey)) {
301 case EVP_PKEY_DH:
302 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(pkey));
303 break;
304
305 case EVP_PKEY_EC:
306 ec = EVP_PKEY_get1_EC_KEY(pkey);
307 nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
308 EC_KEY_free(ec);
309
310 if ((cname = EC_curve_nid2nist(nid)) == NULL)
311 cname = OBJ_nid2sn(nid);
312
313 BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(pkey));
314 break;
315
316 default:
317 BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(pkey)),
318 EVP_PKEY_bits(pkey));
319 }
320
321 EVP_PKEY_free(pkey);
322 return 1;
323 }
324
325 long
bio_dump_callback(BIO * bio,int cmd,const char * argp,int argi,long argl,long ret)326 bio_dump_callback(BIO * bio, int cmd, const char *argp,
327 int argi, long argl, long ret)
328 {
329 BIO *out;
330
331 out = (BIO *) BIO_get_callback_arg(bio);
332 if (out == NULL)
333 return (ret);
334
335 if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
336 BIO_printf(out,
337 "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
338 (void *) bio, argp, (unsigned long) argi, ret, ret);
339 BIO_dump(out, argp, (int) ret);
340 return (ret);
341 } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
342 BIO_printf(out,
343 "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
344 (void *) bio, argp, (unsigned long) argi, ret, ret);
345 BIO_dump(out, argp, (int) ret);
346 }
347 return (ret);
348 }
349
350 void
apps_ssl_info_callback(const SSL * s,int where,int ret)351 apps_ssl_info_callback(const SSL * s, int where, int ret)
352 {
353 const char *str;
354 int w;
355
356 w = where & ~SSL_ST_MASK;
357
358 if (w & SSL_ST_CONNECT)
359 str = "SSL_connect";
360 else if (w & SSL_ST_ACCEPT)
361 str = "SSL_accept";
362 else
363 str = "undefined";
364
365 if (where & SSL_CB_LOOP) {
366 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
367 } else if (where & SSL_CB_ALERT) {
368 str = (where & SSL_CB_READ) ? "read" : "write";
369 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
370 SSL_alert_type_string_long(ret),
371 SSL_alert_desc_string_long(ret));
372 } else if (where & SSL_CB_EXIT) {
373 if (ret == 0)
374 BIO_printf(bio_err, "%s:failed in %s\n",
375 str, SSL_state_string_long(s));
376 else if (ret < 0) {
377 BIO_printf(bio_err, "%s:error in %s\n",
378 str, SSL_state_string_long(s));
379 }
380 }
381 }
382
383
384 void
msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)385 msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
386 {
387 BIO *bio = arg;
388 const char *str_write_p, *str_version, *str_content_type = "",
389 *str_details1 = "", *str_details2 = "";
390
391 str_write_p = write_p ? ">>>" : "<<<";
392
393 /* XXX convert to using ssl_get_version */
394 switch (version) {
395 case SSL2_VERSION:
396 str_version = "SSL 2.0";
397 break;
398 case SSL3_VERSION:
399 str_version = "SSL 3.0 ";
400 break;
401 case TLS1_VERSION:
402 str_version = "TLS 1.0 ";
403 break;
404 case TLS1_1_VERSION:
405 str_version = "TLS 1.1 ";
406 break;
407 case TLS1_2_VERSION:
408 str_version = "TLS 1.2 ";
409 break;
410 case TLS1_3_VERSION:
411 str_version = "TLS 1.3 ";
412 break;
413 case DTLS1_VERSION:
414 str_version = "DTLS 1.0 ";
415 break;
416 case DTLS1_2_VERSION:
417 str_version = "DTLS 1.2 ";
418 break;
419 default:
420 str_version = "???";
421 }
422
423 if (version == SSL2_VERSION) {
424 str_details1 = "???";
425
426 if (len > 0) {
427 /* XXX magic numbers */
428 switch (((const unsigned char *) buf)[0]) {
429 case 0:
430 str_details1 = ", ERROR:";
431 str_details2 = " ???";
432 if (len >= 3) {
433 unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
434
435 switch (err) {
436 case 0x0001:
437 str_details2 = " NO-CIPHER-ERROR";
438 break;
439 case 0x0002:
440 str_details2 = " NO-CERTIFICATE-ERROR";
441 break;
442 case 0x0004:
443 str_details2 = " BAD-CERTIFICATE-ERROR";
444 break;
445 case 0x0006:
446 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
447 break;
448 }
449 }
450 break;
451 case 1:
452 str_details1 = ", CLIENT-HELLO";
453 break;
454 case 2:
455 str_details1 = ", CLIENT-MASTER-KEY";
456 break;
457 case 3:
458 str_details1 = ", CLIENT-FINISHED";
459 break;
460 case 4:
461 str_details1 = ", SERVER-HELLO";
462 break;
463 case 5:
464 str_details1 = ", SERVER-VERIFY";
465 break;
466 case 6:
467 str_details1 = ", SERVER-FINISHED";
468 break;
469 case 7:
470 str_details1 = ", REQUEST-CERTIFICATE";
471 break;
472 case 8:
473 str_details1 = ", CLIENT-CERTIFICATE";
474 break;
475 }
476 }
477 }
478 if (version == SSL3_VERSION || version == TLS1_VERSION ||
479 version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
480 version == TLS1_3_VERSION || version == DTLS1_VERSION ||
481 version == DTLS1_2_VERSION) {
482 /* XXX magic numbers are in ssl3.h */
483 switch (content_type) {
484 case 20:
485 str_content_type = "ChangeCipherSpec";
486 break;
487 case 21:
488 str_content_type = "Alert";
489 break;
490 case 22:
491 str_content_type = "Handshake";
492 break;
493 }
494
495 if (content_type == 21) { /* Alert */
496 str_details1 = ", ???";
497
498 if (len == 2) {
499 switch (((const unsigned char *) buf)[0]) {
500 case 1:
501 str_details1 = ", warning";
502 break;
503 case 2:
504 str_details1 = ", fatal";
505 break;
506 }
507
508 str_details2 = " ???";
509 switch (((const unsigned char *) buf)[1]) {
510 case 0:
511 str_details2 = " close_notify";
512 break;
513 case 10:
514 str_details2 = " unexpected_message";
515 break;
516 case 20:
517 str_details2 = " bad_record_mac";
518 break;
519 case 21:
520 str_details2 = " decryption_failed";
521 break;
522 case 22:
523 str_details2 = " record_overflow";
524 break;
525 case 30:
526 str_details2 = " decompression_failure";
527 break;
528 case 40:
529 str_details2 = " handshake_failure";
530 break;
531 case 42:
532 str_details2 = " bad_certificate";
533 break;
534 case 43:
535 str_details2 = " unsupported_certificate";
536 break;
537 case 44:
538 str_details2 = " certificate_revoked";
539 break;
540 case 45:
541 str_details2 = " certificate_expired";
542 break;
543 case 46:
544 str_details2 = " certificate_unknown";
545 break;
546 case 47:
547 str_details2 = " illegal_parameter";
548 break;
549 case 48:
550 str_details2 = " unknown_ca";
551 break;
552 case 49:
553 str_details2 = " access_denied";
554 break;
555 case 50:
556 str_details2 = " decode_error";
557 break;
558 case 51:
559 str_details2 = " decrypt_error";
560 break;
561 case 60:
562 str_details2 = " export_restriction";
563 break;
564 case 70:
565 str_details2 = " protocol_version";
566 break;
567 case 71:
568 str_details2 = " insufficient_security";
569 break;
570 case 80:
571 str_details2 = " internal_error";
572 break;
573 case 90:
574 str_details2 = " user_canceled";
575 break;
576 case 100:
577 str_details2 = " no_renegotiation";
578 break;
579 case 110:
580 str_details2 = " unsupported_extension";
581 break;
582 case 111:
583 str_details2 = " certificate_unobtainable";
584 break;
585 case 112:
586 str_details2 = " unrecognized_name";
587 break;
588 case 113:
589 str_details2 = " bad_certificate_status_response";
590 break;
591 case 114:
592 str_details2 = " bad_certificate_hash_value";
593 break;
594 case 115:
595 str_details2 = " unknown_psk_identity";
596 break;
597 }
598 }
599 }
600 if (content_type == 22) { /* Handshake */
601 str_details1 = "???";
602
603 if (len > 0) {
604 switch (((const unsigned char *) buf)[0]) {
605 case 0:
606 str_details1 = ", HelloRequest";
607 break;
608 case 1:
609 str_details1 = ", ClientHello";
610 break;
611 case 2:
612 str_details1 = ", ServerHello";
613 break;
614 case 3:
615 str_details1 = ", HelloVerifyRequest";
616 break;
617 case 4:
618 str_details1 = ", NewSessionTicket";
619 break;
620 case 5:
621 str_details1 = ", EndOfEarlyData";
622 break;
623 case 8:
624 str_details1 = ", EncryptedExtensions";
625 break;
626 case 11:
627 str_details1 = ", Certificate";
628 break;
629 case 12:
630 str_details1 = ", ServerKeyExchange";
631 break;
632 case 13:
633 str_details1 = ", CertificateRequest";
634 break;
635 case 14:
636 str_details1 = ", ServerHelloDone";
637 break;
638 case 15:
639 str_details1 = ", CertificateVerify";
640 break;
641 case 16:
642 str_details1 = ", ClientKeyExchange";
643 break;
644 case 20:
645 str_details1 = ", Finished";
646 break;
647 case 24:
648 str_details1 = ", KeyUpdate";
649 break;
650 }
651 }
652 }
653 }
654 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
655 str_version, str_content_type, (unsigned long) len,
656 str_details1, str_details2);
657
658 if (len > 0) {
659 size_t num, i;
660
661 BIO_printf(bio, " ");
662 num = len;
663
664 for (i = 0; i < num; i++) {
665 if (i % 16 == 0 && i > 0)
666 BIO_printf(bio, "\n ");
667 BIO_printf(bio, " %02x",
668 ((const unsigned char *) buf)[i]);
669 }
670 if (i < len)
671 BIO_printf(bio, " ...");
672 BIO_printf(bio, "\n");
673 }
674 (void) BIO_flush(bio);
675 }
676
677 void
tlsext_cb(SSL * s,int client_server,int type,unsigned char * data,int len,void * arg)678 tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
679 void *arg)
680 {
681 BIO *bio = arg;
682 char *extname;
683
684 switch (type) {
685 case TLSEXT_TYPE_server_name:
686 extname = "server name";
687 break;
688
689 case TLSEXT_TYPE_max_fragment_length:
690 extname = "max fragment length";
691 break;
692
693 case TLSEXT_TYPE_client_certificate_url:
694 extname = "client certificate URL";
695 break;
696
697 case TLSEXT_TYPE_trusted_ca_keys:
698 extname = "trusted CA keys";
699 break;
700
701 case TLSEXT_TYPE_truncated_hmac:
702 extname = "truncated HMAC";
703 break;
704
705 case TLSEXT_TYPE_status_request:
706 extname = "status request";
707 break;
708
709 case TLSEXT_TYPE_user_mapping:
710 extname = "user mapping";
711 break;
712
713 case TLSEXT_TYPE_client_authz:
714 extname = "client authz";
715 break;
716
717 case TLSEXT_TYPE_server_authz:
718 extname = "server authz";
719 break;
720
721 case TLSEXT_TYPE_cert_type:
722 extname = "cert type";
723 break;
724
725 case TLSEXT_TYPE_supported_groups:
726 extname = "supported groups";
727 break;
728
729 case TLSEXT_TYPE_ec_point_formats:
730 extname = "EC point formats";
731 break;
732
733 case TLSEXT_TYPE_srp:
734 extname = "SRP";
735 break;
736
737 case TLSEXT_TYPE_signature_algorithms:
738 extname = "signature algorithms";
739 break;
740
741 case TLSEXT_TYPE_use_srtp:
742 extname = "use SRTP";
743 break;
744
745 case TLSEXT_TYPE_heartbeat:
746 extname = "heartbeat";
747 break;
748
749 case TLSEXT_TYPE_application_layer_protocol_negotiation:
750 extname = "application layer protocol negotiation";
751 break;
752
753 case TLSEXT_TYPE_padding:
754 extname = "TLS padding";
755 break;
756
757 case TLSEXT_TYPE_session_ticket:
758 extname = "session ticket";
759 break;
760
761 #if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
762 case TLSEXT_TYPE_pre_shared_key:
763 extname = "pre shared key";
764 break;
765
766 case TLSEXT_TYPE_early_data:
767 extname = "early data";
768 break;
769
770 case TLSEXT_TYPE_supported_versions:
771 extname = "supported versions";
772 break;
773
774 case TLSEXT_TYPE_cookie:
775 extname = "cookie";
776 break;
777
778 case TLSEXT_TYPE_psk_key_exchange_modes:
779 extname = "PSK key exchange modes";
780 break;
781
782 case TLSEXT_TYPE_certificate_authorities:
783 extname = "certificate authorities";
784 break;
785
786 case TLSEXT_TYPE_oid_filters:
787 extname = "OID filters";
788 break;
789
790 case TLSEXT_TYPE_post_handshake_auth:
791 extname = "post handshake auth";
792 break;
793
794 case TLSEXT_TYPE_signature_algorithms_cert:
795 extname = "signature algorithms cert";
796 break;
797
798 case TLSEXT_TYPE_key_share:
799 extname = "key share";
800 break;
801 #endif
802
803 case TLSEXT_TYPE_renegotiate:
804 extname = "renegotiation info";
805 break;
806
807 default:
808 extname = "unknown";
809 break;
810
811 }
812
813 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
814 client_server ? "server" : "client", extname, type, len);
815 BIO_dump(bio, (char *) data, len);
816 (void) BIO_flush(bio);
817 }
818
819 int
generate_cookie_callback(SSL * ssl,unsigned char * cookie,unsigned int * cookie_len)820 generate_cookie_callback(SSL * ssl, unsigned char *cookie,
821 unsigned int *cookie_len)
822 {
823 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
824 unsigned int length, resultlength;
825 union {
826 struct sockaddr sa;
827 struct sockaddr_in s4;
828 struct sockaddr_in6 s6;
829 } peer;
830
831 /* Initialize a random secret */
832 if (!cookie_initialized) {
833 arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
834 cookie_initialized = 1;
835 }
836 /* Read peer information */
837 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
838
839 /* Create buffer with peer's address and port */
840 length = 0;
841 switch (peer.sa.sa_family) {
842 case AF_INET:
843 length += sizeof(struct in_addr);
844 length += sizeof(peer.s4.sin_port);
845 break;
846 case AF_INET6:
847 length += sizeof(struct in6_addr);
848 length += sizeof(peer.s6.sin6_port);
849 break;
850 default:
851 OPENSSL_assert(0);
852 break;
853 }
854 buffer = malloc(length);
855
856 if (buffer == NULL) {
857 BIO_printf(bio_err, "out of memory\n");
858 return 0;
859 }
860 switch (peer.sa.sa_family) {
861 case AF_INET:
862 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
863 memcpy(buffer + sizeof(peer.s4.sin_port),
864 &peer.s4.sin_addr, sizeof(struct in_addr));
865 break;
866 case AF_INET6:
867 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
868 memcpy(buffer + sizeof(peer.s6.sin6_port),
869 &peer.s6.sin6_addr, sizeof(struct in6_addr));
870 break;
871 default:
872 OPENSSL_assert(0);
873 break;
874 }
875
876 /* Calculate HMAC of buffer using the secret */
877 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
878 buffer, length, result, &resultlength);
879 free(buffer);
880
881 memcpy(cookie, result, resultlength);
882 *cookie_len = resultlength;
883
884 return 1;
885 }
886
887 int
verify_cookie_callback(SSL * ssl,const unsigned char * cookie,unsigned int cookie_len)888 verify_cookie_callback(SSL * ssl, const unsigned char *cookie,
889 unsigned int cookie_len)
890 {
891 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
892 unsigned int length, resultlength;
893 union {
894 struct sockaddr sa;
895 struct sockaddr_in s4;
896 struct sockaddr_in6 s6;
897 } peer;
898
899 /* If secret isn't initialized yet, the cookie can't be valid */
900 if (!cookie_initialized)
901 return 0;
902
903 /* Read peer information */
904 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
905
906 /* Create buffer with peer's address and port */
907 length = 0;
908 switch (peer.sa.sa_family) {
909 case AF_INET:
910 length += sizeof(struct in_addr);
911 length += sizeof(peer.s4.sin_port);
912 break;
913 case AF_INET6:
914 length += sizeof(struct in6_addr);
915 length += sizeof(peer.s6.sin6_port);
916 break;
917 default:
918 OPENSSL_assert(0);
919 break;
920 }
921 buffer = malloc(length);
922
923 if (buffer == NULL) {
924 BIO_printf(bio_err, "out of memory\n");
925 return 0;
926 }
927 switch (peer.sa.sa_family) {
928 case AF_INET:
929 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
930 memcpy(buffer + sizeof(peer.s4.sin_port),
931 &peer.s4.sin_addr, sizeof(struct in_addr));
932 break;
933 case AF_INET6:
934 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
935 memcpy(buffer + sizeof(peer.s6.sin6_port),
936 &peer.s6.sin6_addr, sizeof(struct in6_addr));
937 break;
938 default:
939 OPENSSL_assert(0);
940 break;
941 }
942
943 /* Calculate HMAC of buffer using the secret */
944 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
945 buffer, length, result, &resultlength);
946 free(buffer);
947
948 if (cookie_len == resultlength &&
949 memcmp(result, cookie, resultlength) == 0)
950 return 1;
951
952 return 0;
953 }
954