7755373d77a3a87b82c6a8570835717693e213eb
[openssl.git] / apps / s_cb.c
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) 1998-2006 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 <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 int verify_return_error=0;
130 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
131 int cookie_initialized=0;
132
133 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
134         {
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         BIO_printf(bio_err,"depth=%d ",depth);
143         if (err_cert)
144                 {
145                 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
146                                         0, XN_FLAG_ONELINE);
147                 BIO_puts(bio_err, "\n");
148                 }
149         else
150                 BIO_puts(bio_err, "<no cert>\n");
151         if (!ok)
152                 {
153                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
154                         X509_verify_cert_error_string(err));
155                 if (verify_depth >= depth)
156                         {
157                         if (!verify_return_error)
158                                 ok=1;
159                         verify_error=X509_V_OK;
160                         }
161                 else
162                         {
163                         ok=0;
164                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
165                         }
166                 }
167         switch (err)
168                 {
169         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
170                 BIO_puts(bio_err,"issuer= ");
171                 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
172                                         0, XN_FLAG_ONELINE);
173                 BIO_puts(bio_err, "\n");
174                 break;
175         case X509_V_ERR_CERT_NOT_YET_VALID:
176         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
177                 BIO_printf(bio_err,"notBefore=");
178                 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
179                 BIO_printf(bio_err,"\n");
180                 break;
181         case X509_V_ERR_CERT_HAS_EXPIRED:
182         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
183                 BIO_printf(bio_err,"notAfter=");
184                 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
185                 BIO_printf(bio_err,"\n");
186                 break;
187         case X509_V_ERR_NO_EXPLICIT_POLICY:
188                 policies_print(bio_err, ctx);
189                 break;
190                 }
191         if (err == X509_V_OK && ok == 2)
192                 policies_print(bio_err, ctx);
193
194         BIO_printf(bio_err,"verify return:%d\n",ok);
195         return(ok);
196         }
197
198 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
199         {
200         if (cert_file != NULL)
201                 {
202                 /*
203                 SSL *ssl;
204                 X509 *x509;
205                 */
206
207                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
208                         SSL_FILETYPE_PEM) <= 0)
209                         {
210                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
211                         ERR_print_errors(bio_err);
212                         return(0);
213                         }
214                 if (key_file == NULL) key_file=cert_file;
215                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
216                         SSL_FILETYPE_PEM) <= 0)
217                         {
218                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
219                         ERR_print_errors(bio_err);
220                         return(0);
221                         }
222
223                 /*
224                 In theory this is no longer needed 
225                 ssl=SSL_new(ctx);
226                 x509=SSL_get_certificate(ssl);
227
228                 if (x509 != NULL) {
229                         EVP_PKEY *pktmp;
230                         pktmp = X509_get_pubkey(x509);
231                         EVP_PKEY_copy_parameters(pktmp,
232                                                 SSL_get_privatekey(ssl));
233                         EVP_PKEY_free(pktmp);
234                 }
235                 SSL_free(ssl);
236                 */
237
238                 /* If we are using DSA, we can copy the parameters from
239                  * the private key */
240                 
241                 
242                 /* Now we know that a key and cert have been set against
243                  * the SSL context */
244                 if (!SSL_CTX_check_private_key(ctx))
245                         {
246                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
247                         return(0);
248                         }
249                 }
250         return(1);
251         }
252
253 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
254         {
255         if (cert ==  NULL)
256                 return 1;
257         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
258                 {
259                 BIO_printf(bio_err,"error setting certificate\n");
260                 ERR_print_errors(bio_err);
261                 return 0;
262                 }
263         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
264                 {
265                 BIO_printf(bio_err,"error setting private key\n");
266                 ERR_print_errors(bio_err);
267                 return 0;
268                 }
269
270                 
271                 /* Now we know that a key and cert have been set against
272                  * the SSL context */
273         if (!SSL_CTX_check_private_key(ctx))
274                 {
275                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
276                 return 0;
277                 }
278         return 1;
279         }
280
281 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
282                                    int argi, long argl, long ret)
283         {
284         BIO *out;
285
286         out=(BIO *)BIO_get_callback_arg(bio);
287         if (out == NULL) return(ret);
288
289         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
290                 {
291                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
292                         (void *)bio,argp,(unsigned long)argi,ret,ret);
293                 BIO_dump(out,argp,(int)ret);
294                 return(ret);
295                 }
296         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
297                 {
298                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
299                         (void *)bio,argp,(unsigned long)argi,ret,ret);
300                 BIO_dump(out,argp,(int)ret);
301                 }
302         return(ret);
303         }
304
305 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
306         {
307         const char *str;
308         int w;
309
310         w=where& ~SSL_ST_MASK;
311
312         if (w & SSL_ST_CONNECT) str="SSL_connect";
313         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
314         else str="undefined";
315
316         if (where & SSL_CB_LOOP)
317                 {
318                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
319                 }
320         else if (where & SSL_CB_ALERT)
321                 {
322                 str=(where & SSL_CB_READ)?"read":"write";
323                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
324                         str,
325                         SSL_alert_type_string_long(ret),
326                         SSL_alert_desc_string_long(ret));
327                 }
328         else if (where & SSL_CB_EXIT)
329                 {
330                 if (ret == 0)
331                         BIO_printf(bio_err,"%s:failed in %s\n",
332                                 str,SSL_state_string_long(s));
333                 else if (ret < 0)
334                         {
335                         BIO_printf(bio_err,"%s:error in %s\n",
336                                 str,SSL_state_string_long(s));
337                         }
338                 }
339         }
340
341
342 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
343         {
344         BIO *bio = arg;
345         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
346         
347         str_write_p = write_p ? ">>>" : "<<<";
348
349         switch (version)
350                 {
351         case SSL2_VERSION:
352                 str_version = "SSL 2.0";
353                 break;
354         case SSL3_VERSION:
355                 str_version = "SSL 3.0 ";
356                 break;
357         case TLS1_VERSION:
358                 str_version = "TLS 1.0 ";
359                 break;
360         case TLS1_1_VERSION:
361                 str_version = "TLS 1.1 ";
362                 break;
363         case DTLS1_VERSION:
364                 str_version = "DTLS 1.0 ";
365                 break;
366         case DTLS1_BAD_VER:
367                 str_version = "DTLS 1.0 (bad) ";
368                 break;
369         default:
370                 str_version = "???";
371                 }
372
373         if (version == SSL2_VERSION)
374                 {
375                 str_details1 = "???";
376
377                 if (len > 0)
378                         {
379                         switch (((const unsigned char*)buf)[0])
380                                 {
381                                 case 0:
382                                         str_details1 = ", ERROR:";
383                                         str_details2 = " ???";
384                                         if (len >= 3)
385                                                 {
386                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
387                                                 
388                                                 switch (err)
389                                                         {
390                                                 case 0x0001:
391                                                         str_details2 = " NO-CIPHER-ERROR";
392                                                         break;
393                                                 case 0x0002:
394                                                         str_details2 = " NO-CERTIFICATE-ERROR";
395                                                         break;
396                                                 case 0x0004:
397                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
398                                                         break;
399                                                 case 0x0006:
400                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
401                                                         break;
402                                                         }
403                                                 }
404
405                                         break;
406                                 case 1:
407                                         str_details1 = ", CLIENT-HELLO";
408                                         break;
409                                 case 2:
410                                         str_details1 = ", CLIENT-MASTER-KEY";
411                                         break;
412                                 case 3:
413                                         str_details1 = ", CLIENT-FINISHED";
414                                         break;
415                                 case 4:
416                                         str_details1 = ", SERVER-HELLO";
417                                         break;
418                                 case 5:
419                                         str_details1 = ", SERVER-VERIFY";
420                                         break;
421                                 case 6:
422                                         str_details1 = ", SERVER-FINISHED";
423                                         break;
424                                 case 7:
425                                         str_details1 = ", REQUEST-CERTIFICATE";
426                                         break;
427                                 case 8:
428                                         str_details1 = ", CLIENT-CERTIFICATE";
429                                         break;
430                                 }
431                         }
432                 }
433
434         if (version == SSL3_VERSION ||
435             version == TLS1_VERSION ||
436             version == DTLS1_VERSION ||
437             version == DTLS1_BAD_VER)
438                 {
439                 switch (content_type)
440                         {
441                 case 20:
442                         str_content_type = "ChangeCipherSpec";
443                         break;
444                 case 21:
445                         str_content_type = "Alert";
446                         break;
447                 case 22:
448                         str_content_type = "Handshake";
449                         break;
450                         }
451
452                 if (content_type == 21) /* Alert */
453                         {
454                         str_details1 = ", ???";
455                         
456                         if (len == 2)
457                                 {
458                                 switch (((const unsigned char*)buf)[0])
459                                         {
460                                 case 1:
461                                         str_details1 = ", warning";
462                                         break;
463                                 case 2:
464                                         str_details1 = ", fatal";
465                                         break;
466                                         }
467
468                                 str_details2 = " ???";
469                                 switch (((const unsigned char*)buf)[1])
470                                         {
471                                 case 0:
472                                         str_details2 = " close_notify";
473                                         break;
474                                 case 10:
475                                         str_details2 = " unexpected_message";
476                                         break;
477                                 case 20:
478                                         str_details2 = " bad_record_mac";
479                                         break;
480                                 case 21:
481                                         str_details2 = " decryption_failed";
482                                         break;
483                                 case 22:
484                                         str_details2 = " record_overflow";
485                                         break;
486                                 case 30:
487                                         str_details2 = " decompression_failure";
488                                         break;
489                                 case 40:
490                                         str_details2 = " handshake_failure";
491                                         break;
492                                 case 42:
493                                         str_details2 = " bad_certificate";
494                                         break;
495                                 case 43:
496                                         str_details2 = " unsupported_certificate";
497                                         break;
498                                 case 44:
499                                         str_details2 = " certificate_revoked";
500                                         break;
501                                 case 45:
502                                         str_details2 = " certificate_expired";
503                                         break;
504                                 case 46:
505                                         str_details2 = " certificate_unknown";
506                                         break;
507                                 case 47:
508                                         str_details2 = " illegal_parameter";
509                                         break;
510                                 case 48:
511                                         str_details2 = " unknown_ca";
512                                         break;
513                                 case 49:
514                                         str_details2 = " access_denied";
515                                         break;
516                                 case 50:
517                                         str_details2 = " decode_error";
518                                         break;
519                                 case 51:
520                                         str_details2 = " decrypt_error";
521                                         break;
522                                 case 60:
523                                         str_details2 = " export_restriction";
524                                         break;
525                                 case 70:
526                                         str_details2 = " protocol_version";
527                                         break;
528                                 case 71:
529                                         str_details2 = " insufficient_security";
530                                         break;
531                                 case 80:
532                                         str_details2 = " internal_error";
533                                         break;
534                                 case 90:
535                                         str_details2 = " user_canceled";
536                                         break;
537                                 case 100:
538                                         str_details2 = " no_renegotiation";
539                                         break;
540                                 case 110:
541                                         str_details2 = " unsupported_extension";
542                                         break;
543                                 case 111:
544                                         str_details2 = " certificate_unobtainable";
545                                         break;
546                                 case 112:
547                                         str_details2 = " unrecognized_name";
548                                         break;
549                                 case 113:
550                                         str_details2 = " bad_certificate_status_response";
551                                         break;
552                                 case 114:
553                                         str_details2 = " bad_certificate_hash_value";
554                                         break;
555                                         }
556                                 }
557                         }
558                 
559                 if (content_type == 22) /* Handshake */
560                         {
561                         str_details1 = "???";
562
563                         if (len > 0)
564                                 {
565                                 switch (((const unsigned char*)buf)[0])
566                                         {
567                                 case 0:
568                                         str_details1 = ", HelloRequest";
569                                         break;
570                                 case 1:
571                                         str_details1 = ", ClientHello";
572                                         break;
573                                 case 2:
574                                         str_details1 = ", ServerHello";
575                                         break;
576                                 case 3:
577                                         str_details1 = ", HelloVerifyRequest";
578                                         break;
579                                 case 11:
580                                         str_details1 = ", Certificate";
581                                         break;
582                                 case 12:
583                                         str_details1 = ", ServerKeyExchange";
584                                         break;
585                                 case 13:
586                                         str_details1 = ", CertificateRequest";
587                                         break;
588                                 case 14:
589                                         str_details1 = ", ServerHelloDone";
590                                         break;
591                                 case 15:
592                                         str_details1 = ", CertificateVerify";
593                                         break;
594                                 case 16:
595                                         str_details1 = ", ClientKeyExchange";
596                                         break;
597                                 case 20:
598                                         str_details1 = ", Finished";
599                                         break;
600                                         }
601                                 }
602                         }
603                 }
604
605         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);
606
607         if (len > 0)
608                 {
609                 size_t num, i;
610                 
611                 BIO_printf(bio, "   ");
612                 num = len;
613 #if 0
614                 if (num > 16)
615                         num = 16;
616 #endif
617                 for (i = 0; i < num; i++)
618                         {
619                         if (i % 16 == 0 && i > 0)
620                                 BIO_printf(bio, "\n   ");
621                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
622                         }
623                 if (i < len)
624                         BIO_printf(bio, " ...");
625                 BIO_printf(bio, "\n");
626                 }
627         (void)BIO_flush(bio);
628         }
629
630 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
631                                         unsigned char *data, int len,
632                                         void *arg)
633         {
634         BIO *bio = arg;
635         char *extname;
636
637         switch(type)
638                 {
639                 case TLSEXT_TYPE_server_name:
640                 extname = "server name";
641                 break;
642
643                 case TLSEXT_TYPE_max_fragment_length:
644                 extname = "max fragment length";
645                 break;
646
647                 case TLSEXT_TYPE_client_certificate_url:
648                 extname = "client certificate URL";
649                 break;
650
651                 case TLSEXT_TYPE_trusted_ca_keys:
652                 extname = "trusted CA keys";
653                 break;
654
655                 case TLSEXT_TYPE_truncated_hmac:
656                 extname = "truncated HMAC";
657                 break;
658
659                 case TLSEXT_TYPE_status_request:
660                 extname = "status request";
661                 break;
662
663                 case TLSEXT_TYPE_elliptic_curves:
664                 extname = "elliptic curves";
665                 break;
666
667                 case TLSEXT_TYPE_ec_point_formats:
668                 extname = "EC point formats";
669                 break;
670
671                 case TLSEXT_TYPE_session_ticket:
672                 extname = "server ticket";
673                 break;
674
675                 case TLSEXT_TYPE_renegotiate:
676                 extname = "renegotiate";
677                 break;
678
679                 case TLSEXT_TYPE_signature_algorithms:
680                 extname = "signature algorithms";
681                 break;
682
683 #ifdef TLSEXT_TYPE_opaque_prf_input
684                 case TLSEXT_TYPE_opaque_prf_input:
685                 extname = "opaque PRF input";
686                 break;
687 #endif
688
689                 default:
690                 extname = "unknown";
691                 break;
692
693                 }
694         
695         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
696                         client_server ? "server": "client",
697                         extname, type, len);
698         BIO_dump(bio, (char *)data, len);
699         (void)BIO_flush(bio);
700         }
701
702 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
703         {
704         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
705         unsigned int length, resultlength;
706         union {
707                 struct sockaddr sa;
708                 struct sockaddr_in s4;
709 #if OPENSSL_USE_IPV6
710                 struct sockaddr_in6 s6;
711 #endif
712         } peer;
713
714         /* Initialize a random secret */
715         if (!cookie_initialized)
716                 {
717                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
718                         {
719                         BIO_printf(bio_err,"error setting random cookie secret\n");
720                         return 0;
721                         }
722                 cookie_initialized = 1;
723                 }
724
725         /* Read peer information */
726         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
727
728         /* Create buffer with peer's address and port */
729         length = 0;
730         switch (peer.sa.sa_family)
731                 {
732         case AF_INET:
733                 length += sizeof(struct in_addr);
734                 length += sizeof(peer.s4.sin_port);
735                 break;
736 #if OPENSSL_USE_IPV6
737         case AF_INET6:
738                 length += sizeof(struct in6_addr);
739                 length += sizeof(peer.s6.sin6_port);
740                 break;
741 #endif
742         default:
743                 OPENSSL_assert(0);
744                 break;
745                 }
746         buffer = OPENSSL_malloc(length);
747
748         if (buffer == NULL)
749                 {
750                 BIO_printf(bio_err,"out of memory\n");
751                 return 0;
752                 }
753
754         switch (peer.sa.sa_family)
755                 {
756         case AF_INET:
757                 memcpy(buffer,
758                        &peer.s4.sin_port,
759                        sizeof(peer.s4.sin_port));
760                 memcpy(buffer + sizeof(peer.s4.sin_port),
761                        &peer.s4.sin_addr,
762                        sizeof(struct in_addr));
763                 break;
764 #if OPENSSL_USE_IPV6
765         case AF_INET6:
766                 memcpy(buffer,
767                        &peer.s6.sin6_port,
768                        sizeof(peer.s6.sin6_port));
769                 memcpy(buffer + sizeof(peer.s6.sin6_port),
770                        &peer.s6.sin6_addr,
771                        sizeof(struct in6_addr));
772                 break;
773 #endif
774         default:
775                 OPENSSL_assert(0);
776                 break;
777                 }
778
779         /* Calculate HMAC of buffer using the secret */
780         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
781              buffer, length, result, &resultlength);
782         OPENSSL_free(buffer);
783
784         memcpy(cookie, result, resultlength);
785         *cookie_len = resultlength;
786
787         return 1;
788         }
789
790 int MS_CALLBACK verify_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 #if OPENSSL_USE_IPV6
798                 struct sockaddr_in6 s6;
799 #endif
800         } peer;
801
802         /* If secret isn't initialized yet, the cookie can't be valid */
803         if (!cookie_initialized)
804                 return 0;
805
806         /* Read peer information */
807         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
808
809         /* Create buffer with peer's address and port */
810         length = 0;
811         switch (peer.sa.sa_family)
812                 {
813         case AF_INET:
814                 length += sizeof(struct in_addr);
815                 length += sizeof(peer.s4.sin_port);
816                 break;
817 #if OPENSSL_USE_IPV6
818         case AF_INET6:
819                 length += sizeof(struct in6_addr);
820                 length += sizeof(peer.s6.sin6_port);
821                 break;
822 #endif
823         default:
824                 OPENSSL_assert(0);
825                 break;
826                 }
827         buffer = OPENSSL_malloc(length);
828         
829         if (buffer == NULL)
830                 {
831                 BIO_printf(bio_err,"out of memory\n");
832                 return 0;
833                 }
834
835         switch (peer.sa.sa_family)
836                 {
837         case AF_INET:
838                 memcpy(buffer,
839                        &peer.s4.sin_port,
840                        sizeof(peer.s4.sin_port));
841                 memcpy(buffer + sizeof(peer.s4.sin_port),
842                        &peer.s4.sin_addr,
843                        sizeof(struct in_addr));
844                 break;
845 #if OPENSSL_USE_IPV6
846         case AF_INET6:
847                 memcpy(buffer,
848                        &peer.s6.sin6_port,
849                        sizeof(peer.s6.sin6_port));
850                 memcpy(buffer + sizeof(peer.s6.sin6_port),
851                        &peer.s6.sin6_addr,
852                        sizeof(struct in6_addr));
853                 break;
854 #endif
855         default:
856                 OPENSSL_assert(0);
857                 break;
858                 }
859
860         /* Calculate HMAC of buffer using the secret */
861         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
862              buffer, length, result, &resultlength);
863         OPENSSL_free(buffer);
864
865         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
866                 return 1;
867
868         return 0;
869         }