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1/* $OpenBSD: s_cb.c,v 1.1 2014/08/26 17:47:25 jsing 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/rand.h>
125#include <openssl/ssl.h>
126#include <openssl/x509.h>
127
128#include "s_apps.h"
129
130#define COOKIE_SECRET_LENGTH 16
131
132int verify_depth = 0;
133int verify_error = X509_V_OK;
134int verify_return_error = 0;
135unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
136int cookie_initialized = 0;
137
138int
139verify_callback(int ok, X509_STORE_CTX * ctx)
140{
141 X509 *err_cert;
142 int err, depth;
143
144 err_cert = X509_STORE_CTX_get_current_cert(ctx);
145 err = X509_STORE_CTX_get_error(ctx);
146 depth = X509_STORE_CTX_get_error_depth(ctx);
147
148 BIO_printf(bio_err, "depth=%d ", depth);
149 if (err_cert) {
150 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
151 0, XN_FLAG_ONELINE);
152 BIO_puts(bio_err, "\n");
153 } else
154 BIO_puts(bio_err, "<no cert>\n");
155 if (!ok) {
156 BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
157 X509_verify_cert_error_string(err));
158 if (verify_depth >= depth) {
159 if (!verify_return_error)
160 ok = 1;
161 verify_error = X509_V_OK;
162 } else {
163 ok = 0;
164 verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
165 }
166 }
167 switch (err) {
168 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
169 BIO_puts(bio_err, "issuer= ");
170 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
171 0, XN_FLAG_ONELINE);
172 BIO_puts(bio_err, "\n");
173 break;
174 case X509_V_ERR_CERT_NOT_YET_VALID:
175 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
176 BIO_printf(bio_err, "notBefore=");
177 ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
178 BIO_printf(bio_err, "\n");
179 break;
180 case X509_V_ERR_CERT_HAS_EXPIRED:
181 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
182 BIO_printf(bio_err, "notAfter=");
183 ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
184 BIO_printf(bio_err, "\n");
185 break;
186 case X509_V_ERR_NO_EXPLICIT_POLICY:
187 policies_print(bio_err, ctx);
188 break;
189 }
190 if (err == X509_V_OK && ok == 2)
191 policies_print(bio_err, ctx);
192
193 BIO_printf(bio_err, "verify return:%d\n", ok);
194 return (ok);
195}
196
197int
198set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
199{
200 if (cert_file != NULL) {
201 /*
202 SSL *ssl;
203 X509 *x509;
204 */
205
206 if (SSL_CTX_use_certificate_file(ctx, cert_file,
207 SSL_FILETYPE_PEM) <= 0) {
208 BIO_printf(bio_err,
209 "unable to get certificate from '%s'\n", cert_file);
210 ERR_print_errors(bio_err);
211 return (0);
212 }
213 if (key_file == NULL)
214 key_file = cert_file;
215 if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
216 SSL_FILETYPE_PEM) <= 0) {
217 BIO_printf(bio_err,
218 "unable to get private key from '%s'\n", key_file);
219 ERR_print_errors(bio_err);
220 return (0);
221 }
222 /*
223 In theory this is no longer needed
224 ssl=SSL_new(ctx);
225 x509=SSL_get_certificate(ssl);
226
227 if (x509 != NULL) {
228 EVP_PKEY *pktmp;
229 pktmp = X509_get_pubkey(x509);
230 EVP_PKEY_copy_parameters(pktmp,
231 SSL_get_privatekey(ssl));
232 EVP_PKEY_free(pktmp);
233 }
234 SSL_free(ssl);
235 */
236
237 /*
238 * If we are using DSA, we can copy the parameters from the
239 * private key
240 */
241
242
243 /*
244 * Now we know that a key and cert have been set against the
245 * SSL context
246 */
247 if (!SSL_CTX_check_private_key(ctx)) {
248 BIO_printf(bio_err,
249 "Private key does not match the certificate public key\n");
250 return (0);
251 }
252 }
253 return (1);
254}
255
256int
257set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
258{
259 if (cert == NULL)
260 return 1;
261 if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
262 BIO_printf(bio_err, "error setting certificate\n");
263 ERR_print_errors(bio_err);
264 return 0;
265 }
266 if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
267 BIO_printf(bio_err, "error setting private key\n");
268 ERR_print_errors(bio_err);
269 return 0;
270 }
271 /*
272 * Now we know that a key and cert have been set against the SSL
273 * context
274 */
275 if (!SSL_CTX_check_private_key(ctx)) {
276 BIO_printf(bio_err,
277 "Private key does not match the certificate public key\n");
278 return 0;
279 }
280 return 1;
281}
282
283long
284bio_dump_callback(BIO * bio, int cmd, const char *argp,
285 int argi, long argl, long ret)
286{
287 BIO *out;
288
289 out = (BIO *) BIO_get_callback_arg(bio);
290 if (out == NULL)
291 return (ret);
292
293 if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
294 BIO_printf(out,
295 "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
296 (void *) bio, argp, (unsigned long) argi, ret, ret);
297 BIO_dump(out, argp, (int) ret);
298 return (ret);
299 } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
300 BIO_printf(out,
301 "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
302 (void *) bio, argp, (unsigned long) argi, ret, ret);
303 BIO_dump(out, argp, (int) ret);
304 }
305 return (ret);
306}
307
308void
309apps_ssl_info_callback(const SSL * s, int where, int ret)
310{
311 const char *str;
312 int w;
313
314 w = where & ~SSL_ST_MASK;
315
316 if (w & SSL_ST_CONNECT)
317 str = "SSL_connect";
318 else if (w & SSL_ST_ACCEPT)
319 str = "SSL_accept";
320 else
321 str = "undefined";
322
323 if (where & SSL_CB_LOOP) {
324 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
325 } else if (where & SSL_CB_ALERT) {
326 str = (where & SSL_CB_READ) ? "read" : "write";
327 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
328 SSL_alert_type_string_long(ret),
329 SSL_alert_desc_string_long(ret));
330 } else if (where & SSL_CB_EXIT) {
331 if (ret == 0)
332 BIO_printf(bio_err, "%s:failed in %s\n",
333 str, SSL_state_string_long(s));
334 else if (ret < 0) {
335 BIO_printf(bio_err, "%s:error in %s\n",
336 str, SSL_state_string_long(s));
337 }
338 }
339}
340
341
342void
343msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
344{
345 BIO *bio = arg;
346 const char *str_write_p, *str_version, *str_content_type = "",
347 *str_details1 = "", *str_details2 = "";
348
349 str_write_p = write_p ? ">>>" : "<<<";
350
351 switch (version) {
352 case SSL2_VERSION:
353 str_version = "SSL 2.0";
354 break;
355 case SSL3_VERSION:
356 str_version = "SSL 3.0 ";
357 break;
358 case TLS1_VERSION:
359 str_version = "TLS 1.0 ";
360 break;
361 case TLS1_1_VERSION:
362 str_version = "TLS 1.1 ";
363 break;
364 case TLS1_2_VERSION:
365 str_version = "TLS 1.2 ";
366 break;
367 case DTLS1_VERSION:
368 str_version = "DTLS 1.0 ";
369 break;
370 case DTLS1_BAD_VER:
371 str_version = "DTLS 1.0 (bad) ";
372 break;
373 default:
374 str_version = "???";
375 }
376
377 if (version == SSL2_VERSION) {
378 str_details1 = "???";
379
380 if (len > 0) {
381 switch (((const unsigned char *) buf)[0]) {
382 case 0:
383 str_details1 = ", ERROR:";
384 str_details2 = " ???";
385 if (len >= 3) {
386 unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
387
388 switch (err) {
389 case 0x0001:
390 str_details2 = " NO-CIPHER-ERROR";
391 break;
392 case 0x0002:
393 str_details2 = " NO-CERTIFICATE-ERROR";
394 break;
395 case 0x0004:
396 str_details2 = " BAD-CERTIFICATE-ERROR";
397 break;
398 case 0x0006:
399 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
400 break;
401 }
402 }
403 break;
404 case 1:
405 str_details1 = ", CLIENT-HELLO";
406 break;
407 case 2:
408 str_details1 = ", CLIENT-MASTER-KEY";
409 break;
410 case 3:
411 str_details1 = ", CLIENT-FINISHED";
412 break;
413 case 4:
414 str_details1 = ", SERVER-HELLO";
415 break;
416 case 5:
417 str_details1 = ", SERVER-VERIFY";
418 break;
419 case 6:
420 str_details1 = ", SERVER-FINISHED";
421 break;
422 case 7:
423 str_details1 = ", REQUEST-CERTIFICATE";
424 break;
425 case 8:
426 str_details1 = ", CLIENT-CERTIFICATE";
427 break;
428 }
429 }
430 }
431 if (version == SSL3_VERSION || version == TLS1_VERSION ||
432 version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
433 version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
434 switch (content_type) {
435 case 20:
436 str_content_type = "ChangeCipherSpec";
437 break;
438 case 21:
439 str_content_type = "Alert";
440 break;
441 case 22:
442 str_content_type = "Handshake";
443 break;
444 }
445
446 if (content_type == 21) { /* Alert */
447 str_details1 = ", ???";
448
449 if (len == 2) {
450 switch (((const unsigned char *) buf)[0]) {
451 case 1:
452 str_details1 = ", warning";
453 break;
454 case 2:
455 str_details1 = ", fatal";
456 break;
457 }
458
459 str_details2 = " ???";
460 switch (((const unsigned char *) buf)[1]) {
461 case 0:
462 str_details2 = " close_notify";
463 break;
464 case 10:
465 str_details2 = " unexpected_message";
466 break;
467 case 20:
468 str_details2 = " bad_record_mac";
469 break;
470 case 21:
471 str_details2 = " decryption_failed";
472 break;
473 case 22:
474 str_details2 = " record_overflow";
475 break;
476 case 30:
477 str_details2 = " decompression_failure";
478 break;
479 case 40:
480 str_details2 = " handshake_failure";
481 break;
482 case 42:
483 str_details2 = " bad_certificate";
484 break;
485 case 43:
486 str_details2 = " unsupported_certificate";
487 break;
488 case 44:
489 str_details2 = " certificate_revoked";
490 break;
491 case 45:
492 str_details2 = " certificate_expired";
493 break;
494 case 46:
495 str_details2 = " certificate_unknown";
496 break;
497 case 47:
498 str_details2 = " illegal_parameter";
499 break;
500 case 48:
501 str_details2 = " unknown_ca";
502 break;
503 case 49:
504 str_details2 = " access_denied";
505 break;
506 case 50:
507 str_details2 = " decode_error";
508 break;
509 case 51:
510 str_details2 = " decrypt_error";
511 break;
512 case 60:
513 str_details2 = " export_restriction";
514 break;
515 case 70:
516 str_details2 = " protocol_version";
517 break;
518 case 71:
519 str_details2 = " insufficient_security";
520 break;
521 case 80:
522 str_details2 = " internal_error";
523 break;
524 case 90:
525 str_details2 = " user_canceled";
526 break;
527 case 100:
528 str_details2 = " no_renegotiation";
529 break;
530 case 110:
531 str_details2 = " unsupported_extension";
532 break;
533 case 111:
534 str_details2 = " certificate_unobtainable";
535 break;
536 case 112:
537 str_details2 = " unrecognized_name";
538 break;
539 case 113:
540 str_details2 = " bad_certificate_status_response";
541 break;
542 case 114:
543 str_details2 = " bad_certificate_hash_value";
544 break;
545 case 115:
546 str_details2 = " unknown_psk_identity";
547 break;
548 }
549 }
550 }
551 if (content_type == 22) { /* Handshake */
552 str_details1 = "???";
553
554 if (len > 0) {
555 switch (((const unsigned char *) buf)[0]) {
556 case 0:
557 str_details1 = ", HelloRequest";
558 break;
559 case 1:
560 str_details1 = ", ClientHello";
561 break;
562 case 2:
563 str_details1 = ", ServerHello";
564 break;
565 case 3:
566 str_details1 = ", HelloVerifyRequest";
567 break;
568 case 11:
569 str_details1 = ", Certificate";
570 break;
571 case 12:
572 str_details1 = ", ServerKeyExchange";
573 break;
574 case 13:
575 str_details1 = ", CertificateRequest";
576 break;
577 case 14:
578 str_details1 = ", ServerHelloDone";
579 break;
580 case 15:
581 str_details1 = ", CertificateVerify";
582 break;
583 case 16:
584 str_details1 = ", ClientKeyExchange";
585 break;
586 case 20:
587 str_details1 = ", Finished";
588 break;
589 }
590 }
591 }
592 }
593 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
594 str_version, str_content_type, (unsigned long) len,
595 str_details1, str_details2);
596
597 if (len > 0) {
598 size_t num, i;
599
600 BIO_printf(bio, " ");
601 num = len;
602#if 0
603 if (num > 16)
604 num = 16;
605#endif
606 for (i = 0; i < num; i++) {
607 if (i % 16 == 0 && i > 0)
608 BIO_printf(bio, "\n ");
609 BIO_printf(bio, " %02x",
610 ((const unsigned char *) buf)[i]);
611 }
612 if (i < len)
613 BIO_printf(bio, " ...");
614 BIO_printf(bio, "\n");
615 }
616 (void) BIO_flush(bio);
617}
618
619void
620tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
621 void *arg)
622{
623 BIO *bio = arg;
624 char *extname;
625
626 switch (type) {
627 case TLSEXT_TYPE_server_name:
628 extname = "server name";
629 break;
630
631 case TLSEXT_TYPE_max_fragment_length:
632 extname = "max fragment length";
633 break;
634
635 case TLSEXT_TYPE_client_certificate_url:
636 extname = "client certificate URL";
637 break;
638
639 case TLSEXT_TYPE_trusted_ca_keys:
640 extname = "trusted CA keys";
641 break;
642
643 case TLSEXT_TYPE_truncated_hmac:
644 extname = "truncated HMAC";
645 break;
646
647 case TLSEXT_TYPE_status_request:
648 extname = "status request";
649 break;
650
651 case TLSEXT_TYPE_user_mapping:
652 extname = "user mapping";
653 break;
654
655 case TLSEXT_TYPE_client_authz:
656 extname = "client authz";
657 break;
658
659 case TLSEXT_TYPE_server_authz:
660 extname = "server authz";
661 break;
662
663 case TLSEXT_TYPE_cert_type:
664 extname = "cert type";
665 break;
666
667 case TLSEXT_TYPE_elliptic_curves:
668 extname = "elliptic curves";
669 break;
670
671 case TLSEXT_TYPE_ec_point_formats:
672 extname = "EC point formats";
673 break;
674
675 case TLSEXT_TYPE_srp:
676 extname = "SRP";
677 break;
678
679 case TLSEXT_TYPE_signature_algorithms:
680 extname = "signature algorithms";
681 break;
682
683 case TLSEXT_TYPE_use_srtp:
684 extname = "use SRTP";
685 break;
686
687 case TLSEXT_TYPE_heartbeat:
688 extname = "heartbeat";
689 break;
690
691 case TLSEXT_TYPE_session_ticket:
692 extname = "session ticket";
693 break;
694
695 case TLSEXT_TYPE_renegotiate:
696 extname = "renegotiation info";
697 break;
698
699#ifdef TLSEXT_TYPE_next_proto_neg
700 case TLSEXT_TYPE_next_proto_neg:
701 extname = "next protocol";
702 break;
703#endif
704
705 default:
706 extname = "unknown";
707 break;
708
709 }
710
711 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
712 client_server ? "server" : "client", extname, type, len);
713 BIO_dump(bio, (char *) data, len);
714 (void) BIO_flush(bio);
715}
716
717int
718generate_cookie_callback(SSL * ssl, unsigned char *cookie,
719 unsigned int *cookie_len)
720{
721 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
722 unsigned int length, resultlength;
723 union {
724 struct sockaddr sa;
725 struct sockaddr_in s4;
726 struct sockaddr_in6 s6;
727 } peer;
728
729 /* Initialize a random secret */
730 if (!cookie_initialized) {
731 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH)) {
732 BIO_printf(bio_err,
733 "error setting random cookie secret\n");
734 return 0;
735 }
736 cookie_initialized = 1;
737 }
738 /* Read peer information */
739 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
740
741 /* Create buffer with peer's address and port */
742 length = 0;
743 switch (peer.sa.sa_family) {
744 case AF_INET:
745 length += sizeof(struct in_addr);
746 length += sizeof(peer.s4.sin_port);
747 break;
748 case AF_INET6:
749 length += sizeof(struct in6_addr);
750 length += sizeof(peer.s6.sin6_port);
751 break;
752 default:
753 OPENSSL_assert(0);
754 break;
755 }
756 buffer = malloc(length);
757
758 if (buffer == NULL) {
759 BIO_printf(bio_err, "out of memory\n");
760 return 0;
761 }
762 switch (peer.sa.sa_family) {
763 case AF_INET:
764 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
765 memcpy(buffer + sizeof(peer.s4.sin_port),
766 &peer.s4.sin_addr, sizeof(struct in_addr));
767 break;
768 case AF_INET6:
769 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
770 memcpy(buffer + sizeof(peer.s6.sin6_port),
771 &peer.s6.sin6_addr, sizeof(struct in6_addr));
772 break;
773 default:
774 OPENSSL_assert(0);
775 break;
776 }
777
778 /* Calculate HMAC of buffer using the secret */
779 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
780 buffer, length, result, &resultlength);
781 free(buffer);
782
783 memcpy(cookie, result, resultlength);
784 *cookie_len = resultlength;
785
786 return 1;
787}
788
789int
790verify_cookie_callback(SSL * ssl, unsigned char *cookie, unsigned int cookie_len)
791{
792 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
793 unsigned int length, resultlength;
794 union {
795 struct sockaddr sa;
796 struct sockaddr_in s4;
797 struct sockaddr_in6 s6;
798 } peer;
799
800 /* If secret isn't initialized yet, the cookie can't be valid */
801 if (!cookie_initialized)
802 return 0;
803
804 /* Read peer information */
805 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
806
807 /* Create buffer with peer's address and port */
808 length = 0;
809 switch (peer.sa.sa_family) {
810 case AF_INET:
811 length += sizeof(struct in_addr);
812 length += sizeof(peer.s4.sin_port);
813 break;
814 case AF_INET6:
815 length += sizeof(struct in6_addr);
816 length += sizeof(peer.s6.sin6_port);
817 break;
818 default:
819 OPENSSL_assert(0);
820 break;
821 }
822 buffer = malloc(length);
823
824 if (buffer == NULL) {
825 BIO_printf(bio_err, "out of memory\n");
826 return 0;
827 }
828 switch (peer.sa.sa_family) {
829 case AF_INET:
830 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
831 memcpy(buffer + sizeof(peer.s4.sin_port),
832 &peer.s4.sin_addr, sizeof(struct in_addr));
833 break;
834 case AF_INET6:
835 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
836 memcpy(buffer + sizeof(peer.s6.sin6_port),
837 &peer.s6.sin6_addr, sizeof(struct in6_addr));
838 break;
839 default:
840 OPENSSL_assert(0);
841 break;
842 }
843
844 /* Calculate HMAC of buffer using the secret */
845 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
846 buffer, length, result, &resultlength);
847 free(buffer);
848
849 if (cookie_len == resultlength &&
850 memcmp(result, cookie, resultlength) == 0)
851 return 1;
852
853 return 0;
854}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 22:58:18 +0000