1 /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
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) 1998-2001 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 <stdio.h>
113 #include <stdlib.h>
114 #define USE_SOCKETS
115 #define NON_MAIN
116 #include "apps.h"
117 #undef NON_MAIN
118 #undef USE_SOCKETS
119 #include <openssl/err.h>
120 #include <openssl/rand.h>
121 #include <openssl/x509.h>
122 #include <openssl/ssl.h>
123 #include "s_apps.h"
124
125 #define COOKIE_SECRET_LENGTH 16
126
127 int verify_depth = 0;
128 int verify_error = X509_V_OK;
129 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
130 int cookie_initialized = 0;
131
verify_callback(int ok,X509_STORE_CTX * ctx)132 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
133 {
134 char buf[256];
135 X509 *err_cert;
136 int err, depth;
137
138 err_cert = X509_STORE_CTX_get_current_cert(ctx);
139 err = X509_STORE_CTX_get_error(ctx);
140 depth = X509_STORE_CTX_get_error_depth(ctx);
141
142 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof buf);
143 BIO_printf(bio_err, "depth=%d %s\n", depth, buf);
144 if (!ok) {
145 BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
146 X509_verify_cert_error_string(err));
147 if (verify_depth >= depth) {
148 ok = 1;
149 verify_error = X509_V_OK;
150 } else {
151 ok = 0;
152 verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
153 }
154 }
155 switch (ctx->error) {
156 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
157 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf,
158 sizeof buf);
159 BIO_printf(bio_err, "issuer= %s\n", buf);
160 break;
161 case X509_V_ERR_CERT_NOT_YET_VALID:
162 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
163 BIO_printf(bio_err, "notBefore=");
164 ASN1_TIME_print(bio_err, X509_get_notBefore(ctx->current_cert));
165 BIO_printf(bio_err, "\n");
166 break;
167 case X509_V_ERR_CERT_HAS_EXPIRED:
168 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
169 BIO_printf(bio_err, "notAfter=");
170 ASN1_TIME_print(bio_err, X509_get_notAfter(ctx->current_cert));
171 BIO_printf(bio_err, "\n");
172 break;
173 }
174 BIO_printf(bio_err, "verify return:%d\n", ok);
175 return (ok);
176 }
177
set_cert_stuff(SSL_CTX * ctx,char * cert_file,char * key_file)178 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
179 {
180 if (cert_file != NULL) {
181 /*-
182 SSL *ssl;
183 X509 *x509;
184 */
185
186 if (SSL_CTX_use_certificate_file(ctx, cert_file,
187 SSL_FILETYPE_PEM) <= 0) {
188 BIO_printf(bio_err, "unable to get certificate from '%s'\n",
189 cert_file);
190 ERR_print_errors(bio_err);
191 return (0);
192 }
193 if (key_file == NULL)
194 key_file = cert_file;
195 if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
196 BIO_printf(bio_err, "unable to get private key from '%s'\n",
197 key_file);
198 ERR_print_errors(bio_err);
199 return (0);
200 }
201
202 /*-
203 In theory this is no longer needed
204 ssl=SSL_new(ctx);
205 x509=SSL_get_certificate(ssl);
206
207 if (x509 != NULL) {
208 EVP_PKEY *pktmp;
209 pktmp = X509_get_pubkey(x509);
210 EVP_PKEY_copy_parameters(pktmp,
211 SSL_get_privatekey(ssl));
212 EVP_PKEY_free(pktmp);
213 }
214 SSL_free(ssl);
215 */
216
217 /*
218 * If we are using DSA, we can copy the parameters from the private
219 * key
220 */
221
222 /*
223 * Now we know that a key and cert have been set against the SSL
224 * context
225 */
226 if (!SSL_CTX_check_private_key(ctx)) {
227 BIO_printf(bio_err,
228 "Private key does not match the certificate public key\n");
229 return (0);
230 }
231 }
232 return (1);
233 }
234
set_cert_key_stuff(SSL_CTX * ctx,X509 * cert,EVP_PKEY * key)235 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
236 {
237 if (cert == NULL)
238 return 1;
239 if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
240 BIO_printf(bio_err, "error setting certificate\n");
241 ERR_print_errors(bio_err);
242 return 0;
243 }
244 if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
245 BIO_printf(bio_err, "error setting private key\n");
246 ERR_print_errors(bio_err);
247 return 0;
248 }
249
250 /*
251 * Now we know that a key and cert have been set against the SSL context
252 */
253 if (!SSL_CTX_check_private_key(ctx)) {
254 BIO_printf(bio_err,
255 "Private key does not match the certificate public key\n");
256 return 0;
257 }
258 return 1;
259 }
260
bio_dump_callback(BIO * bio,int cmd,const char * argp,int argi,long argl,long ret)261 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
262 int argi, long argl, long ret)
263 {
264 BIO *out;
265
266 out = (BIO *)BIO_get_callback_arg(bio);
267 if (out == NULL)
268 return (ret);
269
270 if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
271 BIO_printf(out, "read from %p [%p] (%d bytes => %ld (0x%lX))\n",
272 (void *)bio, argp, argi, ret, ret);
273 BIO_dump(out, argp, (int)ret);
274 return (ret);
275 } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
276 BIO_printf(out, "write to %p [%p] (%d bytes => %ld (0x%lX))\n",
277 (void *)bio, argp, argi, ret, ret);
278 BIO_dump(out, argp, (int)ret);
279 }
280 return (ret);
281 }
282
apps_ssl_info_callback(const SSL * s,int where,int ret)283 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
284 {
285 const char *str;
286 int w;
287
288 w = where & ~SSL_ST_MASK;
289
290 if (w & SSL_ST_CONNECT)
291 str = "SSL_connect";
292 else if (w & SSL_ST_ACCEPT)
293 str = "SSL_accept";
294 else
295 str = "undefined";
296
297 if (where & SSL_CB_LOOP) {
298 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
299 } else if (where & SSL_CB_ALERT) {
300 str = (where & SSL_CB_READ) ? "read" : "write";
301 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
302 str,
303 SSL_alert_type_string_long(ret),
304 SSL_alert_desc_string_long(ret));
305 } else if (where & SSL_CB_EXIT) {
306 if (ret == 0)
307 BIO_printf(bio_err, "%s:failed in %s\n",
308 str, SSL_state_string_long(s));
309 else if (ret < 0) {
310 BIO_printf(bio_err, "%s:error in %s\n",
311 str, SSL_state_string_long(s));
312 }
313 }
314 }
315
msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)316 void MS_CALLBACK msg_cb(int write_p, int version, int content_type,
317 const void *buf, size_t len, SSL *ssl, void *arg)
318 {
319 BIO *bio = arg;
320 const char *str_write_p, *str_version, *str_content_type =
321 "", *str_details1 = "", *str_details2 = "";
322
323 str_write_p = write_p ? ">>>" : "<<<";
324
325 switch (version) {
326 case SSL2_VERSION:
327 str_version = "SSL 2.0";
328 break;
329 case SSL3_VERSION:
330 str_version = "SSL 3.0 ";
331 break;
332 case TLS1_VERSION:
333 str_version = "TLS 1.0 ";
334 break;
335 default:
336 str_version = "???";
337 case DTLS1_VERSION:
338 str_version = "DTLS 1.0 ";
339 break;
340 case DTLS1_BAD_VER:
341 str_version = "DTLS 1.0 (bad) ";
342 break;
343 }
344
345 if (version == SSL2_VERSION) {
346 str_details1 = "???";
347
348 if (len > 0) {
349 switch (((const unsigned char *)buf)[0]) {
350 case 0:
351 str_details1 = ", ERROR:";
352 str_details2 = " ???";
353 if (len >= 3) {
354 unsigned err =
355 (((const unsigned char *)buf)[1] << 8) +
356 ((const unsigned char *)buf)[2];
357
358 switch (err) {
359 case 0x0001:
360 str_details2 = " NO-CIPHER-ERROR";
361 break;
362 case 0x0002:
363 str_details2 = " NO-CERTIFICATE-ERROR";
364 break;
365 case 0x0004:
366 str_details2 = " BAD-CERTIFICATE-ERROR";
367 break;
368 case 0x0006:
369 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
370 break;
371 }
372 }
373
374 break;
375 case 1:
376 str_details1 = ", CLIENT-HELLO";
377 break;
378 case 2:
379 str_details1 = ", CLIENT-MASTER-KEY";
380 break;
381 case 3:
382 str_details1 = ", CLIENT-FINISHED";
383 break;
384 case 4:
385 str_details1 = ", SERVER-HELLO";
386 break;
387 case 5:
388 str_details1 = ", SERVER-VERIFY";
389 break;
390 case 6:
391 str_details1 = ", SERVER-FINISHED";
392 break;
393 case 7:
394 str_details1 = ", REQUEST-CERTIFICATE";
395 break;
396 case 8:
397 str_details1 = ", CLIENT-CERTIFICATE";
398 break;
399 }
400 }
401 }
402
403 if (version == SSL3_VERSION ||
404 version == TLS1_VERSION ||
405 version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
406 switch (content_type) {
407 case 20:
408 str_content_type = "ChangeCipherSpec";
409 break;
410 case 21:
411 str_content_type = "Alert";
412 break;
413 case 22:
414 str_content_type = "Handshake";
415 break;
416 }
417
418 if (content_type == 21) { /* Alert */
419 str_details1 = ", ???";
420
421 if (len == 2) {
422 switch (((const unsigned char *)buf)[0]) {
423 case 1:
424 str_details1 = ", warning";
425 break;
426 case 2:
427 str_details1 = ", fatal";
428 break;
429 }
430
431 str_details2 = " ???";
432 switch (((const unsigned char *)buf)[1]) {
433 case 0:
434 str_details2 = " close_notify";
435 break;
436 case 10:
437 str_details2 = " unexpected_message";
438 break;
439 case 20:
440 str_details2 = " bad_record_mac";
441 break;
442 case 21:
443 str_details2 = " decryption_failed";
444 break;
445 case 22:
446 str_details2 = " record_overflow";
447 break;
448 case 30:
449 str_details2 = " decompression_failure";
450 break;
451 case 40:
452 str_details2 = " handshake_failure";
453 break;
454 case 42:
455 str_details2 = " bad_certificate";
456 break;
457 case 43:
458 str_details2 = " unsupported_certificate";
459 break;
460 case 44:
461 str_details2 = " certificate_revoked";
462 break;
463 case 45:
464 str_details2 = " certificate_expired";
465 break;
466 case 46:
467 str_details2 = " certificate_unknown";
468 break;
469 case 47:
470 str_details2 = " illegal_parameter";
471 break;
472 case 48:
473 str_details2 = " unknown_ca";
474 break;
475 case 49:
476 str_details2 = " access_denied";
477 break;
478 case 50:
479 str_details2 = " decode_error";
480 break;
481 case 51:
482 str_details2 = " decrypt_error";
483 break;
484 case 60:
485 str_details2 = " export_restriction";
486 break;
487 case 70:
488 str_details2 = " protocol_version";
489 break;
490 case 71:
491 str_details2 = " insufficient_security";
492 break;
493 case 80:
494 str_details2 = " internal_error";
495 break;
496 case 90:
497 str_details2 = " user_canceled";
498 break;
499 case 100:
500 str_details2 = " no_renegotiation";
501 break;
502 case 110:
503 str_details2 = " unsupported_extension";
504 break;
505 case 111:
506 str_details2 = " certificate_unobtainable";
507 break;
508 case 112:
509 str_details2 = " unrecognized_name";
510 break;
511 case 113:
512 str_details2 = " bad_certificate_status_response";
513 break;
514 case 114:
515 str_details2 = " bad_certificate_hash_value";
516 break;
517 case 115:
518 str_details2 = " unknown_psk_identity";
519 break;
520 }
521 }
522 }
523
524 if (content_type == 22) { /* Handshake */
525 str_details1 = "???";
526
527 if (len > 0) {
528 switch (((const unsigned char *)buf)[0]) {
529 case 0:
530 str_details1 = ", HelloRequest";
531 break;
532 case 1:
533 str_details1 = ", ClientHello";
534 break;
535 case 2:
536 str_details1 = ", ServerHello";
537 break;
538 case 11:
539 str_details1 = ", Certificate";
540 break;
541 case 12:
542 str_details1 = ", ServerKeyExchange";
543 break;
544 case 13:
545 str_details1 = ", CertificateRequest";
546 break;
547 case 14:
548 str_details1 = ", ServerHelloDone";
549 break;
550 case 15:
551 str_details1 = ", CertificateVerify";
552 break;
553 case 3:
554 str_details1 = ", HelloVerifyRequest";
555 break;
556 case 16:
557 str_details1 = ", ClientKeyExchange";
558 break;
559 case 20:
560 str_details1 = ", Finished";
561 break;
562 }
563 }
564 }
565 }
566
567 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
568 str_content_type, (unsigned long)len, str_details1,
569 str_details2);
570
571 if (len > 0) {
572 size_t num, i;
573
574 BIO_printf(bio, " ");
575 num = len;
576 #if 0
577 if (num > 16)
578 num = 16;
579 #endif
580 for (i = 0; i < num; i++) {
581 if (i % 16 == 0 && i > 0)
582 BIO_printf(bio, "\n ");
583 BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
584 }
585 if (i < len)
586 BIO_printf(bio, " ...");
587 BIO_printf(bio, "\n");
588 }
589 (void)BIO_flush(bio);
590 }
591
tlsext_cb(SSL * s,int client_server,int type,unsigned char * data,int len,void * arg)592 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
593 unsigned char *data, int len, void *arg)
594 {
595 BIO *bio = arg;
596 char *extname;
597
598 switch (type) {
599 case TLSEXT_TYPE_server_name:
600 extname = "server name";
601 break;
602
603 case TLSEXT_TYPE_max_fragment_length:
604 extname = "max fragment length";
605 break;
606
607 case TLSEXT_TYPE_client_certificate_url:
608 extname = "client certificate URL";
609 break;
610
611 case TLSEXT_TYPE_trusted_ca_keys:
612 extname = "trusted CA keys";
613 break;
614
615 case TLSEXT_TYPE_truncated_hmac:
616 extname = "truncated HMAC";
617 break;
618
619 case TLSEXT_TYPE_status_request:
620 extname = "status request";
621 break;
622
623 case TLSEXT_TYPE_elliptic_curves:
624 extname = "elliptic curves";
625 break;
626
627 case TLSEXT_TYPE_ec_point_formats:
628 extname = "EC point formats";
629 break;
630
631 case TLSEXT_TYPE_session_ticket:
632 extname = "server ticket";
633 break;
634
635 case TLSEXT_TYPE_renegotiate:
636 extname = "renegotiate";
637 break;
638
639 default:
640 extname = "unknown";
641 break;
642
643 }
644
645 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
646 client_server ? "server" : "client", extname, type, len);
647 BIO_dump(bio, (char *)data, len);
648 (void)BIO_flush(bio);
649 }
650
generate_cookie_callback(SSL * ssl,unsigned char * cookie,unsigned int * cookie_len)651 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie,
652 unsigned int *cookie_len)
653 {
654 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
655 unsigned int length, resultlength;
656 struct sockaddr_in peer;
657
658 /* Initialize a random secret */
659 if (!cookie_initialized) {
660 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH)) {
661 BIO_printf(bio_err, "error setting random cookie secret\n");
662 return 0;
663 }
664 cookie_initialized = 1;
665 }
666
667 /* Read peer information */
668 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
669
670 /* Create buffer with peer's address and port */
671 length = sizeof(peer.sin_addr);
672 length += sizeof(peer.sin_port);
673 buffer = OPENSSL_malloc(length);
674
675 if (buffer == NULL) {
676 BIO_printf(bio_err, "out of memory\n");
677 return 0;
678 }
679
680 memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
681 memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port,
682 sizeof(peer.sin_port));
683
684 /* Calculate HMAC of buffer using the secret */
685 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
686 buffer, length, result, &resultlength);
687 OPENSSL_free(buffer);
688
689 memcpy(cookie, result, resultlength);
690 *cookie_len = resultlength;
691
692 return 1;
693 }
694
verify_cookie_callback(SSL * ssl,unsigned char * cookie,unsigned int cookie_len)695 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie,
696 unsigned int cookie_len)
697 {
698 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
699 unsigned int length, resultlength;
700 struct sockaddr_in peer;
701
702 /* If secret isn't initialized yet, the cookie can't be valid */
703 if (!cookie_initialized)
704 return 0;
705
706 /* Read peer information */
707 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
708
709 /* Create buffer with peer's address and port */
710 length = sizeof(peer.sin_addr);
711 length += sizeof(peer.sin_port);
712 buffer = (unsigned char *)OPENSSL_malloc(length);
713
714 if (buffer == NULL) {
715 BIO_printf(bio_err, "out of memory\n");
716 return 0;
717 }
718
719 memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
720 memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port,
721 sizeof(peer.sin_port));
722
723 /* Calculate HMAC of buffer using the secret */
724 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
725 buffer, length, result, &resultlength);
726 OPENSSL_free(buffer);
727
728 if (cookie_len == resultlength
729 && memcmp(result, cookie, resultlength) == 0)
730 return 1;
731
732 return 0;
733 }
734