Import OpenSSL-0.9.8m.
[dragonfly.git] / crypto / openssl / apps / s_cb.c
CommitLineData
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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>
5f042374 120#include <openssl/rand.h>
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121#include <openssl/x509.h>
122#include <openssl/ssl.h>
123#include "s_apps.h"
124
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125#define COOKIE_SECRET_LENGTH 16
126
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127int verify_depth=0;
128int verify_error=X509_V_OK;
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129unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
130int cookie_initialized=0;
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131
132int 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 {
146 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
147 X509_verify_cert_error_string(err));
148 if (verify_depth >= depth)
149 {
150 ok=1;
151 verify_error=X509_V_OK;
152 }
153 else
154 {
155 ok=0;
156 verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
157 }
158 }
159 switch (ctx->error)
160 {
161 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
162 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,sizeof buf);
163 BIO_printf(bio_err,"issuer= %s\n",buf);
164 break;
165 case X509_V_ERR_CERT_NOT_YET_VALID:
166 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
167 BIO_printf(bio_err,"notBefore=");
168 ASN1_TIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
169 BIO_printf(bio_err,"\n");
170 break;
171 case X509_V_ERR_CERT_HAS_EXPIRED:
172 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
173 BIO_printf(bio_err,"notAfter=");
174 ASN1_TIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
175 BIO_printf(bio_err,"\n");
176 break;
177 }
178 BIO_printf(bio_err,"verify return:%d\n",ok);
179 return(ok);
180 }
181
182int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
183 {
184 if (cert_file != NULL)
185 {
186 /*
187 SSL *ssl;
188 X509 *x509;
189 */
190
191 if (SSL_CTX_use_certificate_file(ctx,cert_file,
192 SSL_FILETYPE_PEM) <= 0)
193 {
194 BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
195 ERR_print_errors(bio_err);
196 return(0);
197 }
198 if (key_file == NULL) key_file=cert_file;
199 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
200 SSL_FILETYPE_PEM) <= 0)
201 {
202 BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
203 ERR_print_errors(bio_err);
204 return(0);
205 }
206
207 /*
208 In theory this is no longer needed
209 ssl=SSL_new(ctx);
210 x509=SSL_get_certificate(ssl);
211
212 if (x509 != NULL) {
213 EVP_PKEY *pktmp;
214 pktmp = X509_get_pubkey(x509);
215 EVP_PKEY_copy_parameters(pktmp,
216 SSL_get_privatekey(ssl));
217 EVP_PKEY_free(pktmp);
218 }
219 SSL_free(ssl);
220 */
221
222 /* If we are using DSA, we can copy the parameters from
223 * the private key */
224
225
226 /* Now we know that a key and cert have been set against
227 * the SSL context */
228 if (!SSL_CTX_check_private_key(ctx))
229 {
230 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
231 return(0);
232 }
233 }
234 return(1);
235 }
236
237int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
238 {
239 if (cert == NULL)
240 return 1;
241 if (SSL_CTX_use_certificate(ctx,cert) <= 0)
242 {
243 BIO_printf(bio_err,"error setting certificate\n");
244 ERR_print_errors(bio_err);
245 return 0;
246 }
247 if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
248 {
249 BIO_printf(bio_err,"error setting private key\n");
250 ERR_print_errors(bio_err);
251 return 0;
252 }
253
254
255 /* Now we know that a key and cert have been set against
256 * the SSL context */
257 if (!SSL_CTX_check_private_key(ctx))
258 {
259 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
260 return 0;
261 }
262 return 1;
263 }
264
265long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
266 int argi, long argl, long ret)
267 {
268 BIO *out;
269
270 out=(BIO *)BIO_get_callback_arg(bio);
271 if (out == NULL) return(ret);
272
273 if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
274 {
275 BIO_printf(out,"read from %p [%p] (%d bytes => %ld (0x%lX))\n",
276 (void *)bio,argp,argi,ret,ret);
277 BIO_dump(out,argp,(int)ret);
278 return(ret);
279 }
280 else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
281 {
282 BIO_printf(out,"write to %p [%p] (%d bytes => %ld (0x%lX))\n",
283 (void *)bio,argp,argi,ret,ret);
284 BIO_dump(out,argp,(int)ret);
285 }
286 return(ret);
287 }
288
289void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
290 {
291 const char *str;
292 int w;
293
294 w=where& ~SSL_ST_MASK;
295
296 if (w & SSL_ST_CONNECT) str="SSL_connect";
297 else if (w & SSL_ST_ACCEPT) str="SSL_accept";
298 else str="undefined";
299
300 if (where & SSL_CB_LOOP)
301 {
302 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
303 }
304 else if (where & SSL_CB_ALERT)
305 {
306 str=(where & SSL_CB_READ)?"read":"write";
307 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
308 str,
309 SSL_alert_type_string_long(ret),
310 SSL_alert_desc_string_long(ret));
311 }
312 else if (where & SSL_CB_EXIT)
313 {
314 if (ret == 0)
315 BIO_printf(bio_err,"%s:failed in %s\n",
316 str,SSL_state_string_long(s));
317 else if (ret < 0)
318 {
319 BIO_printf(bio_err,"%s:error in %s\n",
320 str,SSL_state_string_long(s));
321 }
322 }
323 }
324
325
326void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
327 {
328 BIO *bio = arg;
329 const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
330
331 str_write_p = write_p ? ">>>" : "<<<";
332
333 switch (version)
334 {
335 case SSL2_VERSION:
336 str_version = "SSL 2.0";
337 break;
338 case SSL3_VERSION:
339 str_version = "SSL 3.0 ";
340 break;
341 case TLS1_VERSION:
342 str_version = "TLS 1.0 ";
343 break;
344 default:
345 str_version = "???";
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346 case DTLS1_VERSION:
347 str_version = "DTLS 1.0 ";
348 break;
349 case DTLS1_BAD_VER:
350 str_version = "DTLS 1.0 (bad) ";
351 break;
56276539
SS
352 }
353
354 if (version == SSL2_VERSION)
355 {
356 str_details1 = "???";
357
358 if (len > 0)
359 {
360 switch (((const unsigned char*)buf)[0])
361 {
362 case 0:
363 str_details1 = ", ERROR:";
364 str_details2 = " ???";
365 if (len >= 3)
366 {
367 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
368
369 switch (err)
370 {
371 case 0x0001:
372 str_details2 = " NO-CIPHER-ERROR";
373 break;
374 case 0x0002:
375 str_details2 = " NO-CERTIFICATE-ERROR";
376 break;
377 case 0x0004:
378 str_details2 = " BAD-CERTIFICATE-ERROR";
379 break;
380 case 0x0006:
381 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
382 break;
383 }
384 }
385
386 break;
387 case 1:
388 str_details1 = ", CLIENT-HELLO";
389 break;
390 case 2:
391 str_details1 = ", CLIENT-MASTER-KEY";
392 break;
393 case 3:
394 str_details1 = ", CLIENT-FINISHED";
395 break;
396 case 4:
397 str_details1 = ", SERVER-HELLO";
398 break;
399 case 5:
400 str_details1 = ", SERVER-VERIFY";
401 break;
402 case 6:
403 str_details1 = ", SERVER-FINISHED";
404 break;
405 case 7:
406 str_details1 = ", REQUEST-CERTIFICATE";
407 break;
408 case 8:
409 str_details1 = ", CLIENT-CERTIFICATE";
410 break;
411 }
412 }
413 }
414
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415 if (version == SSL3_VERSION ||
416 version == TLS1_VERSION ||
417 version == DTLS1_VERSION ||
418 version == DTLS1_BAD_VER)
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419 {
420 switch (content_type)
421 {
422 case 20:
423 str_content_type = "ChangeCipherSpec";
424 break;
425 case 21:
426 str_content_type = "Alert";
427 break;
428 case 22:
429 str_content_type = "Handshake";
430 break;
431 }
432
433 if (content_type == 21) /* Alert */
434 {
435 str_details1 = ", ???";
436
437 if (len == 2)
438 {
439 switch (((const unsigned char*)buf)[0])
440 {
441 case 1:
442 str_details1 = ", warning";
443 break;
444 case 2:
445 str_details1 = ", fatal";
446 break;
447 }
448
449 str_details2 = " ???";
450 switch (((const unsigned char*)buf)[1])
451 {
452 case 0:
453 str_details2 = " close_notify";
454 break;
455 case 10:
456 str_details2 = " unexpected_message";
457 break;
458 case 20:
459 str_details2 = " bad_record_mac";
460 break;
461 case 21:
462 str_details2 = " decryption_failed";
463 break;
464 case 22:
465 str_details2 = " record_overflow";
466 break;
467 case 30:
468 str_details2 = " decompression_failure";
469 break;
470 case 40:
471 str_details2 = " handshake_failure";
472 break;
473 case 42:
474 str_details2 = " bad_certificate";
475 break;
476 case 43:
477 str_details2 = " unsupported_certificate";
478 break;
479 case 44:
480 str_details2 = " certificate_revoked";
481 break;
482 case 45:
483 str_details2 = " certificate_expired";
484 break;
485 case 46:
486 str_details2 = " certificate_unknown";
487 break;
488 case 47:
489 str_details2 = " illegal_parameter";
490 break;
491 case 48:
492 str_details2 = " unknown_ca";
493 break;
494 case 49:
495 str_details2 = " access_denied";
496 break;
497 case 50:
498 str_details2 = " decode_error";
499 break;
500 case 51:
501 str_details2 = " decrypt_error";
502 break;
503 case 60:
504 str_details2 = " export_restriction";
505 break;
506 case 70:
507 str_details2 = " protocol_version";
508 break;
509 case 71:
510 str_details2 = " insufficient_security";
511 break;
512 case 80:
513 str_details2 = " internal_error";
514 break;
515 case 90:
516 str_details2 = " user_canceled";
517 break;
518 case 100:
519 str_details2 = " no_renegotiation";
520 break;
521 }
522 }
523 }
524
525 if (content_type == 22) /* Handshake */
526 {
527 str_details1 = "???";
528
529 if (len > 0)
530 {
531 switch (((const unsigned char*)buf)[0])
532 {
533 case 0:
534 str_details1 = ", HelloRequest";
535 break;
536 case 1:
537 str_details1 = ", ClientHello";
538 break;
539 case 2:
540 str_details1 = ", ServerHello";
541 break;
542 case 11:
543 str_details1 = ", Certificate";
544 break;
545 case 12:
546 str_details1 = ", ServerKeyExchange";
547 break;
548 case 13:
549 str_details1 = ", CertificateRequest";
550 break;
551 case 14:
552 str_details1 = ", ServerHelloDone";
553 break;
554 case 15:
555 str_details1 = ", CertificateVerify";
556 break;
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557 case 3:
558 str_details1 = ", HelloVerifyRequest";
559 break;
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560 case 16:
561 str_details1 = ", ClientKeyExchange";
562 break;
563 case 20:
564 str_details1 = ", Finished";
565 break;
566 }
567 }
568 }
569 }
570
571 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
572
573 if (len > 0)
574 {
575 size_t num, i;
576
577 BIO_printf(bio, " ");
578 num = len;
579#if 0
580 if (num > 16)
581 num = 16;
582#endif
583 for (i = 0; i < num; i++)
584 {
585 if (i % 16 == 0 && i > 0)
586 BIO_printf(bio, "\n ");
587 BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
588 }
589 if (i < len)
590 BIO_printf(bio, " ...");
591 BIO_printf(bio, "\n");
592 }
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PA
593 (void)BIO_flush(bio);
594 }
595
596void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
597 unsigned char *data, int len,
598 void *arg)
599 {
600 BIO *bio = arg;
601 char *extname;
602
603 switch(type)
604 {
605 case TLSEXT_TYPE_server_name:
606 extname = "server name";
607 break;
608
609 case TLSEXT_TYPE_max_fragment_length:
610 extname = "max fragment length";
611 break;
612
613 case TLSEXT_TYPE_client_certificate_url:
614 extname = "client certificate URL";
615 break;
616
617 case TLSEXT_TYPE_trusted_ca_keys:
618 extname = "trusted CA keys";
619 break;
620
621 case TLSEXT_TYPE_truncated_hmac:
622 extname = "truncated HMAC";
623 break;
624
625 case TLSEXT_TYPE_status_request:
626 extname = "status request";
627 break;
628
629 case TLSEXT_TYPE_elliptic_curves:
630 extname = "elliptic curves";
631 break;
632
633 case TLSEXT_TYPE_ec_point_formats:
634 extname = "EC point formats";
635 break;
636
637 case TLSEXT_TYPE_session_ticket:
638 extname = "server ticket";
639 break;
640
5f042374
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641 case TLSEXT_TYPE_renegotiate:
642 extname = "renegotiate";
643 break;
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PA
644
645 default:
646 extname = "unknown";
647 break;
648
649 }
650
651 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
652 client_server ? "server": "client",
653 extname, type, len);
654 BIO_dump(bio, (char *)data, len);
655 (void)BIO_flush(bio);
56276539 656 }
5f042374
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657
658int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
659 {
660 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
661 unsigned int length, resultlength;
662 struct sockaddr_in peer;
663
664 /* Initialize a random secret */
665 if (!cookie_initialized)
666 {
667 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
668 {
669 BIO_printf(bio_err,"error setting random cookie secret\n");
670 return 0;
671 }
672 cookie_initialized = 1;
673 }
674
675 /* Read peer information */
676 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
677
678 /* Create buffer with peer's address and port */
679 length = sizeof(peer.sin_addr);
680 length += sizeof(peer.sin_port);
681 buffer = OPENSSL_malloc(length);
682
683 if (buffer == NULL)
684 {
685 BIO_printf(bio_err,"out of memory\n");
686 return 0;
687 }
688
689 memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
690 memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port, sizeof(peer.sin_port));
691
692 /* Calculate HMAC of buffer using the secret */
693 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
694 buffer, length, result, &resultlength);
695 OPENSSL_free(buffer);
696
697 memcpy(cookie, result, resultlength);
698 *cookie_len = resultlength;
699
700 return 1;
701 }
702
703int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
704 {
705 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
706 unsigned int length, resultlength;
707 struct sockaddr_in peer;
708
709 /* If secret isn't initialized yet, the cookie can't be valid */
710 if (!cookie_initialized)
711 return 0;
712
713 /* Read peer information */
714 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
715
716 /* Create buffer with peer's address and port */
717 length = sizeof(peer.sin_addr);
718 length += sizeof(peer.sin_port);
719 buffer = (unsigned char*) OPENSSL_malloc(length);
720
721 if (buffer == NULL)
722 {
723 BIO_printf(bio_err,"out of memory\n");
724 return 0;
725 }
726
727 memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
728 memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port, sizeof(peer.sin_port));
729
730 /* Calculate HMAC of buffer using the secret */
731 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
732 buffer, length, result, &resultlength);
733 OPENSSL_free(buffer);
734
735 if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
736 return 1;
737
738 return 0;
739 }