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Support TLS extensions (specifically, HostName)
[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
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) 1998-2003 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 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124
125 #include <stdio.h>
126 #include "ssl_locl.h"
127 #include "kssl_lcl.h"
128 #include <openssl/buffer.h>
129 #include <openssl/rand.h>
130 #include <openssl/objects.h>
131 #include <openssl/evp.h>
132 #include <openssl/md5.h>
133 #ifndef OPENSSL_NO_DH
134 #include <openssl/dh.h>
135 #endif
136 #include <openssl/bn.h>
137
138 static const SSL_METHOD *ssl3_get_client_method(int ver);
139 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
140
141 #ifndef OPENSSL_NO_ECDH
142 static int curve_id2nid(int curve_id);
143 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
144 #endif
145
146 static const SSL_METHOD *ssl3_get_client_method(int ver)
147 {
148 if (ver == SSL3_VERSION)
149 return(SSLv3_client_method());
150 else
151 return(NULL);
152 }
153
154 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
155 ssl_undefined_function,
156 ssl3_connect,
157 ssl3_get_client_method)
158
159 int ssl3_connect(SSL *s)
160 {
161 BUF_MEM *buf=NULL;
162 unsigned long Time=(unsigned long)time(NULL),l;
163 long num1;
164 void (*cb)(const SSL *ssl,int type,int val)=NULL;
165 int ret= -1;
166 int new_state,state,skip=0;;
167
168 RAND_add(&Time,sizeof(Time),0);
169 ERR_clear_error();
170 clear_sys_error();
171
172 if (s->info_callback != NULL)
173 cb=s->info_callback;
174 else if (s->ctx->info_callback != NULL)
175 cb=s->ctx->info_callback;
176
177 s->in_handshake++;
178 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
179
180 for (;;)
181 {
182 state=s->state;
183
184 switch(s->state)
185 {
186 case SSL_ST_RENEGOTIATE:
187 s->new_session=1;
188 s->state=SSL_ST_CONNECT;
189 s->ctx->stats.sess_connect_renegotiate++;
190 /* break */
191 case SSL_ST_BEFORE:
192 case SSL_ST_CONNECT:
193 case SSL_ST_BEFORE|SSL_ST_CONNECT:
194 case SSL_ST_OK|SSL_ST_CONNECT:
195
196 s->server=0;
197 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
198
199 if ((s->version & 0xff00 ) != 0x0300)
200 {
201 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
202 ret = -1;
203 goto end;
204 }
205
206 /* s->version=SSL3_VERSION; */
207 s->type=SSL_ST_CONNECT;
208
209 if (s->init_buf == NULL)
210 {
211 if ((buf=BUF_MEM_new()) == NULL)
212 {
213 ret= -1;
214 goto end;
215 }
216 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
217 {
218 ret= -1;
219 goto end;
220 }
221 s->init_buf=buf;
222 buf=NULL;
223 }
224
225 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
226
227 /* setup buffing BIO */
228 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
229
230 /* don't push the buffering BIO quite yet */
231
232 ssl3_init_finished_mac(s);
233
234 s->state=SSL3_ST_CW_CLNT_HELLO_A;
235 s->ctx->stats.sess_connect++;
236 s->init_num=0;
237 break;
238
239 case SSL3_ST_CW_CLNT_HELLO_A:
240 case SSL3_ST_CW_CLNT_HELLO_B:
241
242 s->shutdown=0;
243 ret=ssl3_client_hello(s);
244 if (ret <= 0) goto end;
245 s->state=SSL3_ST_CR_SRVR_HELLO_A;
246 s->init_num=0;
247
248 /* turn on buffering for the next lot of output */
249 if (s->bbio != s->wbio)
250 s->wbio=BIO_push(s->bbio,s->wbio);
251
252 break;
253
254 case SSL3_ST_CR_SRVR_HELLO_A:
255 case SSL3_ST_CR_SRVR_HELLO_B:
256 ret=ssl3_get_server_hello(s);
257 if (ret <= 0) goto end;
258 #ifndef OPENSSL_NO_TLSEXT
259 {
260 int extension_error = 0,al;
261 if ((al = ssl_check_Hello_TLS_extensions(s,&extension_error)) != SSL_ERROR_NONE){
262 ret = -1;
263 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SERVERHELLO_TLS_EXT);
264 goto end;
265 }
266 }
267 #endif
268 if (s->hit)
269 s->state=SSL3_ST_CR_FINISHED_A;
270 else
271 s->state=SSL3_ST_CR_CERT_A;
272 s->init_num=0;
273 break;
274
275 case SSL3_ST_CR_CERT_A:
276 case SSL3_ST_CR_CERT_B:
277 /* Check if it is anon DH/ECDH */
278 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
279 {
280 ret=ssl3_get_server_certificate(s);
281 if (ret <= 0) goto end;
282 }
283 else
284 skip=1;
285 s->state=SSL3_ST_CR_KEY_EXCH_A;
286 s->init_num=0;
287 break;
288
289 case SSL3_ST_CR_KEY_EXCH_A:
290 case SSL3_ST_CR_KEY_EXCH_B:
291 ret=ssl3_get_key_exchange(s);
292 if (ret <= 0) goto end;
293 s->state=SSL3_ST_CR_CERT_REQ_A;
294 s->init_num=0;
295
296 /* at this point we check that we have the
297 * required stuff from the server */
298 if (!ssl3_check_cert_and_algorithm(s))
299 {
300 ret= -1;
301 goto end;
302 }
303 break;
304
305 case SSL3_ST_CR_CERT_REQ_A:
306 case SSL3_ST_CR_CERT_REQ_B:
307 ret=ssl3_get_certificate_request(s);
308 if (ret <= 0) goto end;
309 s->state=SSL3_ST_CR_SRVR_DONE_A;
310 s->init_num=0;
311 break;
312
313 case SSL3_ST_CR_SRVR_DONE_A:
314 case SSL3_ST_CR_SRVR_DONE_B:
315 ret=ssl3_get_server_done(s);
316 if (ret <= 0) goto end;
317 if (s->s3->tmp.cert_req)
318 s->state=SSL3_ST_CW_CERT_A;
319 else
320 s->state=SSL3_ST_CW_KEY_EXCH_A;
321 s->init_num=0;
322
323 break;
324
325 case SSL3_ST_CW_CERT_A:
326 case SSL3_ST_CW_CERT_B:
327 case SSL3_ST_CW_CERT_C:
328 case SSL3_ST_CW_CERT_D:
329 ret=ssl3_send_client_certificate(s);
330 if (ret <= 0) goto end;
331 s->state=SSL3_ST_CW_KEY_EXCH_A;
332 s->init_num=0;
333 break;
334
335 case SSL3_ST_CW_KEY_EXCH_A:
336 case SSL3_ST_CW_KEY_EXCH_B:
337 ret=ssl3_send_client_key_exchange(s);
338 if (ret <= 0) goto end;
339 l=s->s3->tmp.new_cipher->algorithms;
340 /* EAY EAY EAY need to check for DH fix cert
341 * sent back */
342 /* For TLS, cert_req is set to 2, so a cert chain
343 * of nothing is sent, but no verify packet is sent */
344 /* XXX: For now, we do not support client
345 * authentication in ECDH cipher suites with
346 * ECDH (rather than ECDSA) certificates.
347 * We need to skip the certificate verify
348 * message when client's ECDH public key is sent
349 * inside the client certificate.
350 */
351 if (s->s3->tmp.cert_req == 1)
352 {
353 s->state=SSL3_ST_CW_CERT_VRFY_A;
354 }
355 else
356 {
357 s->state=SSL3_ST_CW_CHANGE_A;
358 s->s3->change_cipher_spec=0;
359 }
360
361 s->init_num=0;
362 break;
363
364 case SSL3_ST_CW_CERT_VRFY_A:
365 case SSL3_ST_CW_CERT_VRFY_B:
366 ret=ssl3_send_client_verify(s);
367 if (ret <= 0) goto end;
368 s->state=SSL3_ST_CW_CHANGE_A;
369 s->init_num=0;
370 s->s3->change_cipher_spec=0;
371 break;
372
373 case SSL3_ST_CW_CHANGE_A:
374 case SSL3_ST_CW_CHANGE_B:
375 ret=ssl3_send_change_cipher_spec(s,
376 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CW_FINISHED_A;
379 s->init_num=0;
380
381 s->session->cipher=s->s3->tmp.new_cipher;
382 #ifdef OPENSSL_NO_COMP
383 s->session->compress_meth=0;
384 #else
385 if (s->s3->tmp.new_compression == NULL)
386 s->session->compress_meth=0;
387 else
388 s->session->compress_meth=
389 s->s3->tmp.new_compression->id;
390 #endif
391 if (!s->method->ssl3_enc->setup_key_block(s))
392 {
393 ret= -1;
394 goto end;
395 }
396
397 if (!s->method->ssl3_enc->change_cipher_state(s,
398 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
399 {
400 ret= -1;
401 goto end;
402 }
403
404 break;
405
406 case SSL3_ST_CW_FINISHED_A:
407 case SSL3_ST_CW_FINISHED_B:
408 ret=ssl3_send_finished(s,
409 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
410 s->method->ssl3_enc->client_finished_label,
411 s->method->ssl3_enc->client_finished_label_len);
412 if (ret <= 0) goto end;
413 s->state=SSL3_ST_CW_FLUSH;
414
415 /* clear flags */
416 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
417 if (s->hit)
418 {
419 s->s3->tmp.next_state=SSL_ST_OK;
420 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
421 {
422 s->state=SSL_ST_OK;
423 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
424 s->s3->delay_buf_pop_ret=0;
425 }
426 }
427 else
428 {
429 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
430 }
431 s->init_num=0;
432 break;
433
434 case SSL3_ST_CR_FINISHED_A:
435 case SSL3_ST_CR_FINISHED_B:
436
437 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
438 SSL3_ST_CR_FINISHED_B);
439 if (ret <= 0) goto end;
440
441 if (s->hit)
442 s->state=SSL3_ST_CW_CHANGE_A;
443 else
444 s->state=SSL_ST_OK;
445 s->init_num=0;
446 break;
447
448 case SSL3_ST_CW_FLUSH:
449 /* number of bytes to be flushed */
450 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
451 if (num1 > 0)
452 {
453 s->rwstate=SSL_WRITING;
454 num1=BIO_flush(s->wbio);
455 if (num1 <= 0) { ret= -1; goto end; }
456 s->rwstate=SSL_NOTHING;
457 }
458
459 s->state=s->s3->tmp.next_state;
460 break;
461
462 case SSL_ST_OK:
463 /* clean a few things up */
464 ssl3_cleanup_key_block(s);
465
466 if (s->init_buf != NULL)
467 {
468 BUF_MEM_free(s->init_buf);
469 s->init_buf=NULL;
470 }
471
472 /* If we are not 'joining' the last two packets,
473 * remove the buffering now */
474 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
475 ssl_free_wbio_buffer(s);
476 /* else do it later in ssl3_write */
477
478 s->init_num=0;
479 s->new_session=0;
480
481 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
482 if (s->hit) s->ctx->stats.sess_hit++;
483
484 ret=1;
485 /* s->server=0; */
486 s->handshake_func=ssl3_connect;
487 s->ctx->stats.sess_connect_good++;
488
489 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
490
491 goto end;
492 /* break; */
493
494 default:
495 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
496 ret= -1;
497 goto end;
498 /* break; */
499 }
500
501 /* did we do anything */
502 if (!s->s3->tmp.reuse_message && !skip)
503 {
504 if (s->debug)
505 {
506 if ((ret=BIO_flush(s->wbio)) <= 0)
507 goto end;
508 }
509
510 if ((cb != NULL) && (s->state != state))
511 {
512 new_state=s->state;
513 s->state=state;
514 cb(s,SSL_CB_CONNECT_LOOP,1);
515 s->state=new_state;
516 }
517 }
518 skip=0;
519 }
520 end:
521 s->in_handshake--;
522 if (buf != NULL)
523 BUF_MEM_free(buf);
524 if (cb != NULL)
525 cb(s,SSL_CB_CONNECT_EXIT,ret);
526 return(ret);
527 }
528
529
530 int ssl3_client_hello(SSL *s)
531 {
532 unsigned char *buf;
533 unsigned char *p,*d;
534 int i;
535 unsigned long Time,l;
536 #ifndef OPENSSL_NO_COMP
537 int j;
538 SSL_COMP *comp;
539 #endif
540
541 buf=(unsigned char *)s->init_buf->data;
542 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
543 {
544 if ((s->session == NULL) ||
545 (s->session->ssl_version != s->version) ||
546 (s->session->not_resumable))
547 {
548 if (!ssl_get_new_session(s,0))
549 goto err;
550 }
551 /* else use the pre-loaded session */
552
553 p=s->s3->client_random;
554 Time=(unsigned long)time(NULL); /* Time */
555 l2n(Time,p);
556 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
557 goto err;
558
559 /* Do the message type and length last */
560 d=p= &(buf[4]);
561
562 *(p++)=s->version>>8;
563 *(p++)=s->version&0xff;
564 s->client_version=s->version;
565
566 /* Random stuff */
567 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
568 p+=SSL3_RANDOM_SIZE;
569
570 /* Session ID */
571 if (s->new_session)
572 i=0;
573 else
574 i=s->session->session_id_length;
575 *(p++)=i;
576 if (i != 0)
577 {
578 if (i > (int)sizeof(s->session->session_id))
579 {
580 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
581 goto err;
582 }
583 memcpy(p,s->session->session_id,i);
584 p+=i;
585 }
586
587 /* Ciphers supported */
588 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
589 if (i == 0)
590 {
591 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
592 goto err;
593 }
594 s2n(i,p);
595 p+=i;
596
597 /* COMPRESSION */
598 #ifdef OPENSSL_NO_COMP
599 *(p++)=1;
600 #else
601
602 if ((s->options & SSL_OP_NO_COMPRESSION)
603 || !s->ctx->comp_methods)
604 j=0;
605 else
606 j=sk_SSL_COMP_num(s->ctx->comp_methods);
607 *(p++)=1+j;
608 for (i=0; i<j; i++)
609 {
610 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
611 *(p++)=comp->id;
612 }
613 #endif
614 *(p++)=0; /* Add the NULL method */
615 #ifndef OPENSSL_NO_TLSEXT
616 if ((p = ssl_add_ClientHello_TLS_extensions(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
617 {
618 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
619 goto err;
620 }
621 #endif
622
623 l=(p-d);
624 d=buf;
625 *(d++)=SSL3_MT_CLIENT_HELLO;
626 l2n3(l,d);
627
628 s->state=SSL3_ST_CW_CLNT_HELLO_B;
629 /* number of bytes to write */
630 s->init_num=p-buf;
631 s->init_off=0;
632 }
633
634 /* SSL3_ST_CW_CLNT_HELLO_B */
635 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
636 err:
637 return(-1);
638 }
639
640 int ssl3_get_server_hello(SSL *s)
641 {
642 STACK_OF(SSL_CIPHER) *sk;
643 SSL_CIPHER *c;
644 unsigned char *p,*d;
645 int i,al,ok;
646 unsigned int j;
647 long n;
648 #ifndef OPENSSL_NO_COMP
649 SSL_COMP *comp;
650 #endif
651
652 n=s->method->ssl_get_message(s,
653 SSL3_ST_CR_SRVR_HELLO_A,
654 SSL3_ST_CR_SRVR_HELLO_B,
655 -1,
656 300, /* ?? */
657 &ok);
658
659 if (!ok) return((int)n);
660
661 if ( SSL_version(s) == DTLS1_VERSION)
662 {
663 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
664 {
665 if ( s->d1->send_cookie == 0)
666 {
667 s->s3->tmp.reuse_message = 1;
668 return 1;
669 }
670 else /* already sent a cookie */
671 {
672 al=SSL_AD_UNEXPECTED_MESSAGE;
673 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
674 goto f_err;
675 }
676 }
677 }
678
679 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
680 {
681 al=SSL_AD_UNEXPECTED_MESSAGE;
682 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
683 goto f_err;
684 }
685
686 d=p=(unsigned char *)s->init_msg;
687
688 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
689 {
690 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
691 s->version=(s->version&0xff00)|p[1];
692 al=SSL_AD_PROTOCOL_VERSION;
693 goto f_err;
694 }
695 p+=2;
696
697 /* load the server hello data */
698 /* load the server random */
699 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
700 p+=SSL3_RANDOM_SIZE;
701
702 /* get the session-id */
703 j= *(p++);
704
705 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
706 {
707 al=SSL_AD_ILLEGAL_PARAMETER;
708 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
709 goto f_err;
710 }
711
712 if (j != 0 && j == s->session->session_id_length
713 && memcmp(p,s->session->session_id,j) == 0)
714 {
715 if(s->sid_ctx_length != s->session->sid_ctx_length
716 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
717 {
718 /* actually a client application bug */
719 al=SSL_AD_ILLEGAL_PARAMETER;
720 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
721 goto f_err;
722 }
723 s->hit=1;
724 }
725 else /* a miss or crap from the other end */
726 {
727 /* If we were trying for session-id reuse, make a new
728 * SSL_SESSION so we don't stuff up other people */
729 s->hit=0;
730 if (s->session->session_id_length > 0)
731 {
732 if (!ssl_get_new_session(s,0))
733 {
734 al=SSL_AD_INTERNAL_ERROR;
735 goto f_err;
736 }
737 }
738 s->session->session_id_length=j;
739 memcpy(s->session->session_id,p,j); /* j could be 0 */
740 }
741 p+=j;
742 c=ssl_get_cipher_by_char(s,p);
743 if (c == NULL)
744 {
745 /* unknown cipher */
746 al=SSL_AD_ILLEGAL_PARAMETER;
747 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
748 goto f_err;
749 }
750 p+=ssl_put_cipher_by_char(s,NULL,NULL);
751
752 sk=ssl_get_ciphers_by_id(s);
753 i=sk_SSL_CIPHER_find(sk,c);
754 if (i < 0)
755 {
756 /* we did not say we would use this cipher */
757 al=SSL_AD_ILLEGAL_PARAMETER;
758 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
759 goto f_err;
760 }
761
762 /* Depending on the session caching (internal/external), the cipher
763 and/or cipher_id values may not be set. Make sure that
764 cipher_id is set and use it for comparison. */
765 if (s->session->cipher)
766 s->session->cipher_id = s->session->cipher->id;
767 if (s->hit && (s->session->cipher_id != c->id))
768 {
769 if (!(s->options &
770 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
771 {
772 al=SSL_AD_ILLEGAL_PARAMETER;
773 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
774 goto f_err;
775 }
776 }
777 s->s3->tmp.new_cipher=c;
778
779 /* lets get the compression algorithm */
780 /* COMPRESSION */
781 #ifdef OPENSSL_NO_COMP
782 if (*(p++) != 0)
783 {
784 al=SSL_AD_ILLEGAL_PARAMETER;
785 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
786 goto f_err;
787 }
788 #else
789 j= *(p++);
790 if ((j == 0) || (s->options & SSL_OP_NO_COMPRESSION))
791 comp=NULL;
792 else
793 comp=ssl3_comp_find(s->ctx->comp_methods,j);
794
795 if ((j != 0) && (comp == NULL))
796 {
797 al=SSL_AD_ILLEGAL_PARAMETER;
798 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
799 goto f_err;
800 }
801 else
802 {
803 s->s3->tmp.new_compression=comp;
804 }
805 #endif
806 #ifndef OPENSSL_NO_TLSEXT
807 /* TLS extensions*/
808 if (s->version > SSL3_VERSION)
809 {
810 if ((al = ssl_parse_ServerHello_TLS_extensions(s,&p,d,n)) != SSL_ERROR_NONE){
811 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLS_EXT);
812 goto f_err;
813 }
814 }
815 #endif
816
817 if (p != (d+n))
818 {
819 /* wrong packet length */
820 al=SSL_AD_DECODE_ERROR;
821 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
822 goto err;
823 }
824
825 return(1);
826 f_err:
827 ssl3_send_alert(s,SSL3_AL_FATAL,al);
828 err:
829 return(-1);
830 }
831
832 int ssl3_get_server_certificate(SSL *s)
833 {
834 int al,i,ok,ret= -1;
835 unsigned long n,nc,llen,l;
836 X509 *x=NULL;
837 const unsigned char *q,*p;
838 unsigned char *d;
839 STACK_OF(X509) *sk=NULL;
840 SESS_CERT *sc;
841 EVP_PKEY *pkey=NULL;
842 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
843
844 n=s->method->ssl_get_message(s,
845 SSL3_ST_CR_CERT_A,
846 SSL3_ST_CR_CERT_B,
847 -1,
848 s->max_cert_list,
849 &ok);
850
851 if (!ok) return((int)n);
852
853 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
854 {
855 s->s3->tmp.reuse_message=1;
856 return(1);
857 }
858
859 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
860 {
861 al=SSL_AD_UNEXPECTED_MESSAGE;
862 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
863 goto f_err;
864 }
865 p=d=(unsigned char *)s->init_msg;
866
867 if ((sk=sk_X509_new_null()) == NULL)
868 {
869 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
870 goto err;
871 }
872
873 n2l3(p,llen);
874 if (llen+3 != n)
875 {
876 al=SSL_AD_DECODE_ERROR;
877 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
878 goto f_err;
879 }
880 for (nc=0; nc<llen; )
881 {
882 n2l3(p,l);
883 if ((l+nc+3) > llen)
884 {
885 al=SSL_AD_DECODE_ERROR;
886 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
887 goto f_err;
888 }
889
890 q=p;
891 x=d2i_X509(NULL,&q,l);
892 if (x == NULL)
893 {
894 al=SSL_AD_BAD_CERTIFICATE;
895 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
896 goto f_err;
897 }
898 if (q != (p+l))
899 {
900 al=SSL_AD_DECODE_ERROR;
901 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
902 goto f_err;
903 }
904 if (!sk_X509_push(sk,x))
905 {
906 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
907 goto err;
908 }
909 x=NULL;
910 nc+=l+3;
911 p=q;
912 }
913
914 i=ssl_verify_cert_chain(s,sk);
915 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
916 #ifndef OPENSSL_NO_KRB5
917 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
918 != (SSL_aKRB5|SSL_kKRB5)
919 #endif /* OPENSSL_NO_KRB5 */
920 )
921 {
922 al=ssl_verify_alarm_type(s->verify_result);
923 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
924 goto f_err;
925 }
926 ERR_clear_error(); /* but we keep s->verify_result */
927
928 sc=ssl_sess_cert_new();
929 if (sc == NULL) goto err;
930
931 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
932 s->session->sess_cert=sc;
933
934 sc->cert_chain=sk;
935 /* Inconsistency alert: cert_chain does include the peer's
936 * certificate, which we don't include in s3_srvr.c */
937 x=sk_X509_value(sk,0);
938 sk=NULL;
939 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
940
941 pkey=X509_get_pubkey(x);
942
943 /* VRS: allow null cert if auth == KRB5 */
944 need_cert = ((s->s3->tmp.new_cipher->algorithms
945 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
946 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
947
948 #ifdef KSSL_DEBUG
949 printf("pkey,x = %p, %p\n", pkey,x);
950 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
951 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
952 s->s3->tmp.new_cipher->algorithms, need_cert);
953 #endif /* KSSL_DEBUG */
954
955 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
956 {
957 x=NULL;
958 al=SSL3_AL_FATAL;
959 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
960 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
961 goto f_err;
962 }
963
964 i=ssl_cert_type(x,pkey);
965 if (need_cert && i < 0)
966 {
967 x=NULL;
968 al=SSL3_AL_FATAL;
969 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
970 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
971 goto f_err;
972 }
973
974 if (need_cert)
975 {
976 sc->peer_cert_type=i;
977 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
978 /* Why would the following ever happen?
979 * We just created sc a couple of lines ago. */
980 if (sc->peer_pkeys[i].x509 != NULL)
981 X509_free(sc->peer_pkeys[i].x509);
982 sc->peer_pkeys[i].x509=x;
983 sc->peer_key= &(sc->peer_pkeys[i]);
984
985 if (s->session->peer != NULL)
986 X509_free(s->session->peer);
987 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
988 s->session->peer=x;
989 }
990 else
991 {
992 sc->peer_cert_type=i;
993 sc->peer_key= NULL;
994
995 if (s->session->peer != NULL)
996 X509_free(s->session->peer);
997 s->session->peer=NULL;
998 }
999 s->session->verify_result = s->verify_result;
1000
1001 x=NULL;
1002 ret=1;
1003
1004 if (0)
1005 {
1006 f_err:
1007 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1008 }
1009 err:
1010 EVP_PKEY_free(pkey);
1011 X509_free(x);
1012 sk_X509_pop_free(sk,X509_free);
1013 return(ret);
1014 }
1015
1016 int ssl3_get_key_exchange(SSL *s)
1017 {
1018 #ifndef OPENSSL_NO_RSA
1019 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1020 #endif
1021 EVP_MD_CTX md_ctx;
1022 unsigned char *param,*p;
1023 int al,i,j,param_len,ok;
1024 long n,alg;
1025 EVP_PKEY *pkey=NULL;
1026 #ifndef OPENSSL_NO_RSA
1027 RSA *rsa=NULL;
1028 #endif
1029 #ifndef OPENSSL_NO_DH
1030 DH *dh=NULL;
1031 #endif
1032 #ifndef OPENSSL_NO_ECDH
1033 EC_KEY *ecdh = NULL;
1034 BN_CTX *bn_ctx = NULL;
1035 EC_POINT *srvr_ecpoint = NULL;
1036 int curve_nid = 0;
1037 int encoded_pt_len = 0;
1038 #endif
1039
1040 /* use same message size as in ssl3_get_certificate_request()
1041 * as ServerKeyExchange message may be skipped */
1042 n=s->method->ssl_get_message(s,
1043 SSL3_ST_CR_KEY_EXCH_A,
1044 SSL3_ST_CR_KEY_EXCH_B,
1045 -1,
1046 s->max_cert_list,
1047 &ok);
1048
1049 if (!ok) return((int)n);
1050
1051 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1052 {
1053 s->s3->tmp.reuse_message=1;
1054 return(1);
1055 }
1056
1057 param=p=(unsigned char *)s->init_msg;
1058
1059 if (s->session->sess_cert != NULL)
1060 {
1061 #ifndef OPENSSL_NO_RSA
1062 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1063 {
1064 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1065 s->session->sess_cert->peer_rsa_tmp=NULL;
1066 }
1067 #endif
1068 #ifndef OPENSSL_NO_DH
1069 if (s->session->sess_cert->peer_dh_tmp)
1070 {
1071 DH_free(s->session->sess_cert->peer_dh_tmp);
1072 s->session->sess_cert->peer_dh_tmp=NULL;
1073 }
1074 #endif
1075 #ifndef OPENSSL_NO_ECDH
1076 if (s->session->sess_cert->peer_ecdh_tmp)
1077 {
1078 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1079 s->session->sess_cert->peer_ecdh_tmp=NULL;
1080 }
1081 #endif
1082 }
1083 else
1084 {
1085 s->session->sess_cert=ssl_sess_cert_new();
1086 }
1087
1088 param_len=0;
1089 alg=s->s3->tmp.new_cipher->algorithms;
1090 EVP_MD_CTX_init(&md_ctx);
1091
1092 #ifndef OPENSSL_NO_RSA
1093 if (alg & SSL_kRSA)
1094 {
1095 if ((rsa=RSA_new()) == NULL)
1096 {
1097 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1098 goto err;
1099 }
1100 n2s(p,i);
1101 param_len=i+2;
1102 if (param_len > n)
1103 {
1104 al=SSL_AD_DECODE_ERROR;
1105 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1106 goto f_err;
1107 }
1108 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1109 {
1110 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1111 goto err;
1112 }
1113 p+=i;
1114
1115 n2s(p,i);
1116 param_len+=i+2;
1117 if (param_len > n)
1118 {
1119 al=SSL_AD_DECODE_ERROR;
1120 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1121 goto f_err;
1122 }
1123 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1124 {
1125 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1126 goto err;
1127 }
1128 p+=i;
1129 n-=param_len;
1130
1131 /* this should be because we are using an export cipher */
1132 if (alg & SSL_aRSA)
1133 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1134 else
1135 {
1136 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1137 goto err;
1138 }
1139 s->session->sess_cert->peer_rsa_tmp=rsa;
1140 rsa=NULL;
1141 }
1142 #else /* OPENSSL_NO_RSA */
1143 if (0)
1144 ;
1145 #endif
1146 #ifndef OPENSSL_NO_DH
1147 else if (alg & SSL_kEDH)
1148 {
1149 if ((dh=DH_new()) == NULL)
1150 {
1151 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1152 goto err;
1153 }
1154 n2s(p,i);
1155 param_len=i+2;
1156 if (param_len > n)
1157 {
1158 al=SSL_AD_DECODE_ERROR;
1159 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1160 goto f_err;
1161 }
1162 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1163 {
1164 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1165 goto err;
1166 }
1167 p+=i;
1168
1169 n2s(p,i);
1170 param_len+=i+2;
1171 if (param_len > n)
1172 {
1173 al=SSL_AD_DECODE_ERROR;
1174 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1175 goto f_err;
1176 }
1177 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1178 {
1179 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1180 goto err;
1181 }
1182 p+=i;
1183
1184 n2s(p,i);
1185 param_len+=i+2;
1186 if (param_len > n)
1187 {
1188 al=SSL_AD_DECODE_ERROR;
1189 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1190 goto f_err;
1191 }
1192 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1193 {
1194 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1195 goto err;
1196 }
1197 p+=i;
1198 n-=param_len;
1199
1200 #ifndef OPENSSL_NO_RSA
1201 if (alg & SSL_aRSA)
1202 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1203 #else
1204 if (0)
1205 ;
1206 #endif
1207 #ifndef OPENSSL_NO_DSA
1208 else if (alg & SSL_aDSS)
1209 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1210 #endif
1211 /* else anonymous DH, so no certificate or pkey. */
1212
1213 s->session->sess_cert->peer_dh_tmp=dh;
1214 dh=NULL;
1215 }
1216 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1217 {
1218 al=SSL_AD_ILLEGAL_PARAMETER;
1219 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1220 goto f_err;
1221 }
1222 #endif /* !OPENSSL_NO_DH */
1223
1224 #ifndef OPENSSL_NO_ECDH
1225 else if (alg & SSL_kECDHE)
1226 {
1227 EC_GROUP *ngroup;
1228 const EC_GROUP *group;
1229
1230 if ((ecdh=EC_KEY_new()) == NULL)
1231 {
1232 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1233 goto err;
1234 }
1235
1236 /* Extract elliptic curve parameters and the
1237 * server's ephemeral ECDH public key.
1238 * Keep accumulating lengths of various components in
1239 * param_len and make sure it never exceeds n.
1240 */
1241
1242 /* XXX: For now we only support named (not generic) curves
1243 * and the ECParameters in this case is just three bytes.
1244 */
1245 param_len=3;
1246 if ((param_len > n) ||
1247 (*p != NAMED_CURVE_TYPE) ||
1248 ((curve_nid = curve_id2nid(*(p + 2))) == 0))
1249 {
1250 al=SSL_AD_INTERNAL_ERROR;
1251 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1252 goto f_err;
1253 }
1254
1255 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1256 if (ngroup == NULL)
1257 {
1258 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1259 goto err;
1260 }
1261 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1262 {
1263 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1264 goto err;
1265 }
1266 EC_GROUP_free(ngroup);
1267
1268 group = EC_KEY_get0_group(ecdh);
1269
1270 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1271 (EC_GROUP_get_degree(group) > 163))
1272 {
1273 al=SSL_AD_EXPORT_RESTRICTION;
1274 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1275 goto f_err;
1276 }
1277
1278 p+=3;
1279
1280 /* Next, get the encoded ECPoint */
1281 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1282 ((bn_ctx = BN_CTX_new()) == NULL))
1283 {
1284 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1285 goto err;
1286 }
1287
1288 encoded_pt_len = *p; /* length of encoded point */
1289 p+=1;
1290 param_len += (1 + encoded_pt_len);
1291 if ((param_len > n) ||
1292 (EC_POINT_oct2point(group, srvr_ecpoint,
1293 p, encoded_pt_len, bn_ctx) == 0))
1294 {
1295 al=SSL_AD_DECODE_ERROR;
1296 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1297 goto f_err;
1298 }
1299
1300 n-=param_len;
1301 p+=encoded_pt_len;
1302
1303 /* The ECC/TLS specification does not mention
1304 * the use of DSA to sign ECParameters in the server
1305 * key exchange message. We do support RSA and ECDSA.
1306 */
1307 if (0) ;
1308 #ifndef OPENSSL_NO_RSA
1309 else if (alg & SSL_aRSA)
1310 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1311 #endif
1312 #ifndef OPENSSL_NO_ECDSA
1313 else if (alg & SSL_aECDSA)
1314 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1315 #endif
1316 /* else anonymous ECDH, so no certificate or pkey. */
1317 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1318 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1319 ecdh=NULL;
1320 BN_CTX_free(bn_ctx);
1321 EC_POINT_free(srvr_ecpoint);
1322 srvr_ecpoint = NULL;
1323 }
1324 else if (alg & SSL_kECDH)
1325 {
1326 al=SSL_AD_UNEXPECTED_MESSAGE;
1327 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1328 goto f_err;
1329 }
1330 #endif /* !OPENSSL_NO_ECDH */
1331 if (alg & SSL_aFZA)
1332 {
1333 al=SSL_AD_HANDSHAKE_FAILURE;
1334 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1335 goto f_err;
1336 }
1337
1338
1339 /* p points to the next byte, there are 'n' bytes left */
1340
1341 /* if it was signed, check the signature */
1342 if (pkey != NULL)
1343 {
1344 n2s(p,i);
1345 n-=2;
1346 j=EVP_PKEY_size(pkey);
1347
1348 if ((i != n) || (n > j) || (n <= 0))
1349 {
1350 /* wrong packet length */
1351 al=SSL_AD_DECODE_ERROR;
1352 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1353 goto f_err;
1354 }
1355
1356 #ifndef OPENSSL_NO_RSA
1357 if (pkey->type == EVP_PKEY_RSA)
1358 {
1359 int num;
1360
1361 j=0;
1362 q=md_buf;
1363 for (num=2; num > 0; num--)
1364 {
1365 EVP_DigestInit_ex(&md_ctx,(num == 2)
1366 ?s->ctx->md5:s->ctx->sha1, NULL);
1367 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1368 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1369 EVP_DigestUpdate(&md_ctx,param,param_len);
1370 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1371 q+=i;
1372 j+=i;
1373 }
1374 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1375 pkey->pkey.rsa);
1376 if (i < 0)
1377 {
1378 al=SSL_AD_DECRYPT_ERROR;
1379 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1380 goto f_err;
1381 }
1382 if (i == 0)
1383 {
1384 /* bad signature */
1385 al=SSL_AD_DECRYPT_ERROR;
1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1387 goto f_err;
1388 }
1389 }
1390 else
1391 #endif
1392 #ifndef OPENSSL_NO_DSA
1393 if (pkey->type == EVP_PKEY_DSA)
1394 {
1395 /* lets do DSS */
1396 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1397 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1398 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1399 EVP_VerifyUpdate(&md_ctx,param,param_len);
1400 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1401 {
1402 /* bad signature */
1403 al=SSL_AD_DECRYPT_ERROR;
1404 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1405 goto f_err;
1406 }
1407 }
1408 else
1409 #endif
1410 #ifndef OPENSSL_NO_ECDSA
1411 if (pkey->type == EVP_PKEY_EC)
1412 {
1413 /* let's do ECDSA */
1414 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1415 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1416 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1417 EVP_VerifyUpdate(&md_ctx,param,param_len);
1418 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1419 {
1420 /* bad signature */
1421 al=SSL_AD_DECRYPT_ERROR;
1422 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1423 goto f_err;
1424 }
1425 }
1426 else
1427 #endif
1428 {
1429 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1430 goto err;
1431 }
1432 }
1433 else
1434 {
1435 /* still data left over */
1436 if (!(alg & SSL_aNULL))
1437 {
1438 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1439 goto err;
1440 }
1441 if (n != 0)
1442 {
1443 al=SSL_AD_DECODE_ERROR;
1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1445 goto f_err;
1446 }
1447 }
1448 EVP_PKEY_free(pkey);
1449 EVP_MD_CTX_cleanup(&md_ctx);
1450 return(1);
1451 f_err:
1452 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1453 err:
1454 EVP_PKEY_free(pkey);
1455 #ifndef OPENSSL_NO_RSA
1456 if (rsa != NULL)
1457 RSA_free(rsa);
1458 #endif
1459 #ifndef OPENSSL_NO_DH
1460 if (dh != NULL)
1461 DH_free(dh);
1462 #endif
1463 #ifndef OPENSSL_NO_ECDH
1464 BN_CTX_free(bn_ctx);
1465 EC_POINT_free(srvr_ecpoint);
1466 if (ecdh != NULL)
1467 EC_KEY_free(ecdh);
1468 #endif
1469 EVP_MD_CTX_cleanup(&md_ctx);
1470 return(-1);
1471 }
1472
1473 int ssl3_get_certificate_request(SSL *s)
1474 {
1475 int ok,ret=0;
1476 unsigned long n,nc,l;
1477 unsigned int llen,ctype_num,i;
1478 X509_NAME *xn=NULL;
1479 const unsigned char *p,*q;
1480 unsigned char *d;
1481 STACK_OF(X509_NAME) *ca_sk=NULL;
1482
1483 n=s->method->ssl_get_message(s,
1484 SSL3_ST_CR_CERT_REQ_A,
1485 SSL3_ST_CR_CERT_REQ_B,
1486 -1,
1487 s->max_cert_list,
1488 &ok);
1489
1490 if (!ok) return((int)n);
1491
1492 s->s3->tmp.cert_req=0;
1493
1494 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1495 {
1496 s->s3->tmp.reuse_message=1;
1497 return(1);
1498 }
1499
1500 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1501 {
1502 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1503 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1504 goto err;
1505 }
1506
1507 /* TLS does not like anon-DH with client cert */
1508 if (s->version > SSL3_VERSION)
1509 {
1510 l=s->s3->tmp.new_cipher->algorithms;
1511 if (l & SSL_aNULL)
1512 {
1513 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1514 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1515 goto err;
1516 }
1517 }
1518
1519 p=d=(unsigned char *)s->init_msg;
1520
1521 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1522 {
1523 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1524 goto err;
1525 }
1526
1527 /* get the certificate types */
1528 ctype_num= *(p++);
1529 if (ctype_num > SSL3_CT_NUMBER)
1530 ctype_num=SSL3_CT_NUMBER;
1531 for (i=0; i<ctype_num; i++)
1532 s->s3->tmp.ctype[i]= p[i];
1533 p+=ctype_num;
1534
1535 /* get the CA RDNs */
1536 n2s(p,llen);
1537 #if 0
1538 {
1539 FILE *out;
1540 out=fopen("/tmp/vsign.der","w");
1541 fwrite(p,1,llen,out);
1542 fclose(out);
1543 }
1544 #endif
1545
1546 if ((llen+ctype_num+2+1) != n)
1547 {
1548 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1549 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1550 goto err;
1551 }
1552
1553 for (nc=0; nc<llen; )
1554 {
1555 n2s(p,l);
1556 if ((l+nc+2) > llen)
1557 {
1558 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1559 goto cont; /* netscape bugs */
1560 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1561 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1562 goto err;
1563 }
1564
1565 q=p;
1566
1567 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1568 {
1569 /* If netscape tolerance is on, ignore errors */
1570 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1571 goto cont;
1572 else
1573 {
1574 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1575 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1576 goto err;
1577 }
1578 }
1579
1580 if (q != (p+l))
1581 {
1582 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1583 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1584 goto err;
1585 }
1586 if (!sk_X509_NAME_push(ca_sk,xn))
1587 {
1588 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1589 goto err;
1590 }
1591
1592 p+=l;
1593 nc+=l+2;
1594 }
1595
1596 if (0)
1597 {
1598 cont:
1599 ERR_clear_error();
1600 }
1601
1602 /* we should setup a certificate to return.... */
1603 s->s3->tmp.cert_req=1;
1604 s->s3->tmp.ctype_num=ctype_num;
1605 if (s->s3->tmp.ca_names != NULL)
1606 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1607 s->s3->tmp.ca_names=ca_sk;
1608 ca_sk=NULL;
1609
1610 ret=1;
1611 err:
1612 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1613 return(ret);
1614 }
1615
1616 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1617 {
1618 return(X509_NAME_cmp(*a,*b));
1619 }
1620
1621 int ssl3_get_server_done(SSL *s)
1622 {
1623 int ok,ret=0;
1624 long n;
1625
1626 n=s->method->ssl_get_message(s,
1627 SSL3_ST_CR_SRVR_DONE_A,
1628 SSL3_ST_CR_SRVR_DONE_B,
1629 SSL3_MT_SERVER_DONE,
1630 30, /* should be very small, like 0 :-) */
1631 &ok);
1632
1633 if (!ok) return((int)n);
1634 if (n > 0)
1635 {
1636 /* should contain no data */
1637 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1638 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1639 return -1;
1640 }
1641 ret=1;
1642 return(ret);
1643 }
1644
1645
1646 int ssl3_send_client_key_exchange(SSL *s)
1647 {
1648 unsigned char *p,*d;
1649 int n;
1650 unsigned long l;
1651 #ifndef OPENSSL_NO_RSA
1652 unsigned char *q;
1653 EVP_PKEY *pkey=NULL;
1654 #endif
1655 #ifndef OPENSSL_NO_KRB5
1656 KSSL_ERR kssl_err;
1657 #endif /* OPENSSL_NO_KRB5 */
1658 #ifndef OPENSSL_NO_ECDH
1659 EC_KEY *clnt_ecdh = NULL;
1660 const EC_POINT *srvr_ecpoint = NULL;
1661 EVP_PKEY *srvr_pub_pkey = NULL;
1662 unsigned char *encodedPoint = NULL;
1663 int encoded_pt_len = 0;
1664 BN_CTX * bn_ctx = NULL;
1665 #endif
1666
1667 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1668 {
1669 d=(unsigned char *)s->init_buf->data;
1670 p= &(d[4]);
1671
1672 l=s->s3->tmp.new_cipher->algorithms;
1673
1674 /* Fool emacs indentation */
1675 if (0) {}
1676 #ifndef OPENSSL_NO_RSA
1677 else if (l & SSL_kRSA)
1678 {
1679 RSA *rsa;
1680 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1681
1682 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1683 rsa=s->session->sess_cert->peer_rsa_tmp;
1684 else
1685 {
1686 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1687 if ((pkey == NULL) ||
1688 (pkey->type != EVP_PKEY_RSA) ||
1689 (pkey->pkey.rsa == NULL))
1690 {
1691 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1692 goto err;
1693 }
1694 rsa=pkey->pkey.rsa;
1695 EVP_PKEY_free(pkey);
1696 }
1697
1698 tmp_buf[0]=s->client_version>>8;
1699 tmp_buf[1]=s->client_version&0xff;
1700 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1701 goto err;
1702
1703 s->session->master_key_length=sizeof tmp_buf;
1704
1705 q=p;
1706 /* Fix buf for TLS and beyond */
1707 if (s->version > SSL3_VERSION)
1708 p+=2;
1709 n=RSA_public_encrypt(sizeof tmp_buf,
1710 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1711 #ifdef PKCS1_CHECK
1712 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1713 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1714 #endif
1715 if (n <= 0)
1716 {
1717 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1718 goto err;
1719 }
1720
1721 /* Fix buf for TLS and beyond */
1722 if (s->version > SSL3_VERSION)
1723 {
1724 s2n(n,q);
1725 n+=2;
1726 }
1727
1728 s->session->master_key_length=
1729 s->method->ssl3_enc->generate_master_secret(s,
1730 s->session->master_key,
1731 tmp_buf,sizeof tmp_buf);
1732 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1733 }
1734 #endif
1735 #ifndef OPENSSL_NO_KRB5
1736 else if (l & SSL_kKRB5)
1737 {
1738 krb5_error_code krb5rc;
1739 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1740 /* krb5_data krb5_ap_req; */
1741 krb5_data *enc_ticket;
1742 krb5_data authenticator, *authp = NULL;
1743 EVP_CIPHER_CTX ciph_ctx;
1744 EVP_CIPHER *enc = NULL;
1745 unsigned char iv[EVP_MAX_IV_LENGTH];
1746 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1747 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1748 + EVP_MAX_IV_LENGTH];
1749 int padl, outl = sizeof(epms);
1750
1751 EVP_CIPHER_CTX_init(&ciph_ctx);
1752
1753 #ifdef KSSL_DEBUG
1754 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1755 l, SSL_kKRB5);
1756 #endif /* KSSL_DEBUG */
1757
1758 authp = NULL;
1759 #ifdef KRB5SENDAUTH
1760 if (KRB5SENDAUTH) authp = &authenticator;
1761 #endif /* KRB5SENDAUTH */
1762
1763 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1764 &kssl_err);
1765 enc = kssl_map_enc(kssl_ctx->enctype);
1766 if (enc == NULL)
1767 goto err;
1768 #ifdef KSSL_DEBUG
1769 {
1770 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1771 if (krb5rc && kssl_err.text)
1772 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1773 }
1774 #endif /* KSSL_DEBUG */
1775
1776 if (krb5rc)
1777 {
1778 ssl3_send_alert(s,SSL3_AL_FATAL,
1779 SSL_AD_HANDSHAKE_FAILURE);
1780 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1781 kssl_err.reason);
1782 goto err;
1783 }
1784
1785 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1786 ** in place of RFC 2712 KerberosWrapper, as in:
1787 **
1788 ** Send ticket (copy to *p, set n = length)
1789 ** n = krb5_ap_req.length;
1790 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1791 ** if (krb5_ap_req.data)
1792 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1793 **
1794 ** Now using real RFC 2712 KerberosWrapper
1795 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1796 ** Note: 2712 "opaque" types are here replaced
1797 ** with a 2-byte length followed by the value.
1798 ** Example:
1799 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1800 ** Where "xx xx" = length bytes. Shown here with
1801 ** optional authenticator omitted.
1802 */
1803
1804 /* KerberosWrapper.Ticket */
1805 s2n(enc_ticket->length,p);
1806 memcpy(p, enc_ticket->data, enc_ticket->length);
1807 p+= enc_ticket->length;
1808 n = enc_ticket->length + 2;
1809
1810 /* KerberosWrapper.Authenticator */
1811 if (authp && authp->length)
1812 {
1813 s2n(authp->length,p);
1814 memcpy(p, authp->data, authp->length);
1815 p+= authp->length;
1816 n+= authp->length + 2;
1817
1818 free(authp->data);
1819 authp->data = NULL;
1820 authp->length = 0;
1821 }
1822 else
1823 {
1824 s2n(0,p);/* null authenticator length */
1825 n+=2;
1826 }
1827
1828 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1829 goto err;
1830
1831 /* 20010420 VRS. Tried it this way; failed.
1832 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1833 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1834 ** kssl_ctx->length);
1835 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1836 */
1837
1838 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1839 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1840 kssl_ctx->key,iv);
1841 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1842 sizeof tmp_buf);
1843 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1844 outl += padl;
1845 if (outl > sizeof epms)
1846 {
1847 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1848 goto err;
1849 }
1850 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1851
1852 /* KerberosWrapper.EncryptedPreMasterSecret */
1853 s2n(outl,p);
1854 memcpy(p, epms, outl);
1855 p+=outl;
1856 n+=outl + 2;
1857
1858 s->session->master_key_length=
1859 s->method->ssl3_enc->generate_master_secret(s,
1860 s->session->master_key,
1861 tmp_buf, sizeof tmp_buf);
1862
1863 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1864 OPENSSL_cleanse(epms, outl);
1865 }
1866 #endif
1867 #ifndef OPENSSL_NO_DH
1868 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1869 {
1870 DH *dh_srvr,*dh_clnt;
1871
1872 if (s->session->sess_cert->peer_dh_tmp != NULL)
1873 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1874 else
1875 {
1876 /* we get them from the cert */
1877 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1878 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1879 goto err;
1880 }
1881
1882 /* generate a new random key */
1883 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1884 {
1885 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1886 goto err;
1887 }
1888 if (!DH_generate_key(dh_clnt))
1889 {
1890 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1891 goto err;
1892 }
1893
1894 /* use the 'p' output buffer for the DH key, but
1895 * make sure to clear it out afterwards */
1896
1897 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1898
1899 if (n <= 0)
1900 {
1901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1902 goto err;
1903 }
1904
1905 /* generate master key from the result */
1906 s->session->master_key_length=
1907 s->method->ssl3_enc->generate_master_secret(s,
1908 s->session->master_key,p,n);
1909 /* clean up */
1910 memset(p,0,n);
1911
1912 /* send off the data */
1913 n=BN_num_bytes(dh_clnt->pub_key);
1914 s2n(n,p);
1915 BN_bn2bin(dh_clnt->pub_key,p);
1916 n+=2;
1917
1918 DH_free(dh_clnt);
1919
1920 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1921 }
1922 #endif
1923
1924 #ifndef OPENSSL_NO_ECDH
1925 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1926 {
1927 const EC_GROUP *srvr_group = NULL;
1928 EC_KEY *tkey;
1929 int ecdh_clnt_cert = 0;
1930 int field_size = 0;
1931
1932 /* Did we send out the client's
1933 * ECDH share for use in premaster
1934 * computation as part of client certificate?
1935 * If so, set ecdh_clnt_cert to 1.
1936 */
1937 if ((l & SSL_kECDH) && (s->cert != NULL))
1938 {
1939 /* XXX: For now, we do not support client
1940 * authentication using ECDH certificates.
1941 * To add such support, one needs to add
1942 * code that checks for appropriate
1943 * conditions and sets ecdh_clnt_cert to 1.
1944 * For example, the cert have an ECC
1945 * key on the same curve as the server's
1946 * and the key should be authorized for
1947 * key agreement.
1948 *
1949 * One also needs to add code in ssl3_connect
1950 * to skip sending the certificate verify
1951 * message.
1952 *
1953 * if ((s->cert->key->privatekey != NULL) &&
1954 * (s->cert->key->privatekey->type ==
1955 * EVP_PKEY_EC) && ...)
1956 * ecdh_clnt_cert = 1;
1957 */
1958 }
1959
1960 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1961 {
1962 tkey = s->session->sess_cert->peer_ecdh_tmp;
1963 }
1964 else
1965 {
1966 /* Get the Server Public Key from Cert */
1967 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1968 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1969 if ((srvr_pub_pkey == NULL) ||
1970 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1971 (srvr_pub_pkey->pkey.ec == NULL))
1972 {
1973 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1974 ERR_R_INTERNAL_ERROR);
1975 goto err;
1976 }
1977
1978 tkey = srvr_pub_pkey->pkey.ec;
1979 }
1980
1981 srvr_group = EC_KEY_get0_group(tkey);
1982 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1983
1984 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1985 {
1986 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1987 ERR_R_INTERNAL_ERROR);
1988 goto err;
1989 }
1990
1991 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1992 {
1993 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1994 goto err;
1995 }
1996
1997 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1998 {
1999 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2000 goto err;
2001 }
2002 if (ecdh_clnt_cert)
2003 {
2004 /* Reuse key info from our certificate
2005 * We only need our private key to perform
2006 * the ECDH computation.
2007 */
2008 const BIGNUM *priv_key;
2009 tkey = s->cert->key->privatekey->pkey.ec;
2010 priv_key = EC_KEY_get0_private_key(tkey);
2011 if (priv_key == NULL)
2012 {
2013 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2014 goto err;
2015 }
2016 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2017 {
2018 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2019 goto err;
2020 }
2021 }
2022 else
2023 {
2024 /* Generate a new ECDH key pair */
2025 if (!(EC_KEY_generate_key(clnt_ecdh)))
2026 {
2027 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2028 goto err;
2029 }
2030 }
2031
2032 /* use the 'p' output buffer for the ECDH key, but
2033 * make sure to clear it out afterwards
2034 */
2035
2036 field_size = EC_GROUP_get_degree(srvr_group);
2037 if (field_size <= 0)
2038 {
2039 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2040 ERR_R_ECDH_LIB);
2041 goto err;
2042 }
2043 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2044 if (n <= 0)
2045 {
2046 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2047 ERR_R_ECDH_LIB);
2048 goto err;
2049 }
2050
2051 /* generate master key from the result */
2052 s->session->master_key_length = s->method->ssl3_enc \
2053 -> generate_master_secret(s,
2054 s->session->master_key,
2055 p, n);
2056
2057 memset(p, 0, n); /* clean up */
2058
2059 if (ecdh_clnt_cert)
2060 {
2061 /* Send empty client key exch message */
2062 n = 0;
2063 }
2064 else
2065 {
2066 /* First check the size of encoding and
2067 * allocate memory accordingly.
2068 */
2069 encoded_pt_len =
2070 EC_POINT_point2oct(srvr_group,
2071 EC_KEY_get0_public_key(clnt_ecdh),
2072 POINT_CONVERSION_UNCOMPRESSED,
2073 NULL, 0, NULL);
2074
2075 encodedPoint = (unsigned char *)
2076 OPENSSL_malloc(encoded_pt_len *
2077 sizeof(unsigned char));
2078 bn_ctx = BN_CTX_new();
2079 if ((encodedPoint == NULL) ||
2080 (bn_ctx == NULL))
2081 {
2082 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2083 goto err;
2084 }
2085
2086 /* Encode the public key */
2087 n = EC_POINT_point2oct(srvr_group,
2088 EC_KEY_get0_public_key(clnt_ecdh),
2089 POINT_CONVERSION_UNCOMPRESSED,
2090 encodedPoint, encoded_pt_len, bn_ctx);
2091
2092 *p = n; /* length of encoded point */
2093 /* Encoded point will be copied here */
2094 p += 1;
2095 /* copy the point */
2096 memcpy((unsigned char *)p, encodedPoint, n);
2097 /* increment n to account for length field */
2098 n += 1;
2099 }
2100
2101 /* Free allocated memory */
2102 BN_CTX_free(bn_ctx);
2103 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2104 if (clnt_ecdh != NULL)
2105 EC_KEY_free(clnt_ecdh);
2106 EVP_PKEY_free(srvr_pub_pkey);
2107 }
2108 #endif /* !OPENSSL_NO_ECDH */
2109 else
2110 {
2111 ssl3_send_alert(s, SSL3_AL_FATAL,
2112 SSL_AD_HANDSHAKE_FAILURE);
2113 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2114 ERR_R_INTERNAL_ERROR);
2115 goto err;
2116 }
2117
2118 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2119 l2n3(n,d);
2120
2121 s->state=SSL3_ST_CW_KEY_EXCH_B;
2122 /* number of bytes to write */
2123 s->init_num=n+4;
2124 s->init_off=0;
2125 }
2126
2127 /* SSL3_ST_CW_KEY_EXCH_B */
2128 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2129 err:
2130 #ifndef OPENSSL_NO_ECDH
2131 BN_CTX_free(bn_ctx);
2132 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2133 if (clnt_ecdh != NULL)
2134 EC_KEY_free(clnt_ecdh);
2135 EVP_PKEY_free(srvr_pub_pkey);
2136 #endif
2137 return(-1);
2138 }
2139
2140 int ssl3_send_client_verify(SSL *s)
2141 {
2142 unsigned char *p,*d;
2143 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2144 EVP_PKEY *pkey;
2145 #ifndef OPENSSL_NO_RSA
2146 unsigned u=0;
2147 #endif
2148 unsigned long n;
2149 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2150 int j;
2151 #endif
2152
2153 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2154 {
2155 d=(unsigned char *)s->init_buf->data;
2156 p= &(d[4]);
2157 pkey=s->cert->key->privatekey;
2158
2159 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2160 &(data[MD5_DIGEST_LENGTH]));
2161
2162 #ifndef OPENSSL_NO_RSA
2163 if (pkey->type == EVP_PKEY_RSA)
2164 {
2165 s->method->ssl3_enc->cert_verify_mac(s,
2166 &(s->s3->finish_dgst1),&(data[0]));
2167 if (RSA_sign(NID_md5_sha1, data,
2168 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2169 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2170 {
2171 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2172 goto err;
2173 }
2174 s2n(u,p);
2175 n=u+2;
2176 }
2177 else
2178 #endif
2179 #ifndef OPENSSL_NO_DSA
2180 if (pkey->type == EVP_PKEY_DSA)
2181 {
2182 if (!DSA_sign(pkey->save_type,
2183 &(data[MD5_DIGEST_LENGTH]),
2184 SHA_DIGEST_LENGTH,&(p[2]),
2185 (unsigned int *)&j,pkey->pkey.dsa))
2186 {
2187 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2188 goto err;
2189 }
2190 s2n(j,p);
2191 n=j+2;
2192 }
2193 else
2194 #endif
2195 #ifndef OPENSSL_NO_ECDSA
2196 if (pkey->type == EVP_PKEY_EC)
2197 {
2198 if (!ECDSA_sign(pkey->save_type,
2199 &(data[MD5_DIGEST_LENGTH]),
2200 SHA_DIGEST_LENGTH,&(p[2]),
2201 (unsigned int *)&j,pkey->pkey.ec))
2202 {
2203 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2204 ERR_R_ECDSA_LIB);
2205 goto err;
2206 }
2207 s2n(j,p);
2208 n=j+2;
2209 }
2210 else
2211 #endif
2212 {
2213 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2214 goto err;
2215 }
2216 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2217 l2n3(n,d);
2218
2219 s->state=SSL3_ST_CW_CERT_VRFY_B;
2220 s->init_num=(int)n+4;
2221 s->init_off=0;
2222 }
2223 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2224 err:
2225 return(-1);
2226 }
2227
2228 int ssl3_send_client_certificate(SSL *s)
2229 {
2230 X509 *x509=NULL;
2231 EVP_PKEY *pkey=NULL;
2232 int i;
2233 unsigned long l;
2234
2235 if (s->state == SSL3_ST_CW_CERT_A)
2236 {
2237 if ((s->cert == NULL) ||
2238 (s->cert->key->x509 == NULL) ||
2239 (s->cert->key->privatekey == NULL))
2240 s->state=SSL3_ST_CW_CERT_B;
2241 else
2242 s->state=SSL3_ST_CW_CERT_C;
2243 }
2244
2245 /* We need to get a client cert */
2246 if (s->state == SSL3_ST_CW_CERT_B)
2247 {
2248 /* If we get an error, we need to
2249 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2250 * We then get retied later */
2251 i=0;
2252 if (s->ctx->client_cert_cb != NULL)
2253 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2254 if (i < 0)
2255 {
2256 s->rwstate=SSL_X509_LOOKUP;
2257 return(-1);
2258 }
2259 s->rwstate=SSL_NOTHING;
2260 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2261 {
2262 s->state=SSL3_ST_CW_CERT_B;
2263 if ( !SSL_use_certificate(s,x509) ||
2264 !SSL_use_PrivateKey(s,pkey))
2265 i=0;
2266 }
2267 else if (i == 1)
2268 {
2269 i=0;
2270 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2271 }
2272
2273 if (x509 != NULL) X509_free(x509);
2274 if (pkey != NULL) EVP_PKEY_free(pkey);
2275 if (i == 0)
2276 {
2277 if (s->version == SSL3_VERSION)
2278 {
2279 s->s3->tmp.cert_req=0;
2280 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2281 return(1);
2282 }
2283 else
2284 {
2285 s->s3->tmp.cert_req=2;
2286 }
2287 }
2288
2289 /* Ok, we have a cert */
2290 s->state=SSL3_ST_CW_CERT_C;
2291 }
2292
2293 if (s->state == SSL3_ST_CW_CERT_C)
2294 {
2295 s->state=SSL3_ST_CW_CERT_D;
2296 l=ssl3_output_cert_chain(s,
2297 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2298 s->init_num=(int)l;
2299 s->init_off=0;
2300 }
2301 /* SSL3_ST_CW_CERT_D */
2302 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2303 }
2304
2305 #define has_bits(i,m) (((i)&(m)) == (m))
2306
2307 int ssl3_check_cert_and_algorithm(SSL *s)
2308 {
2309 int i,idx;
2310 long algs;
2311 EVP_PKEY *pkey=NULL;
2312 SESS_CERT *sc;
2313 #ifndef OPENSSL_NO_RSA
2314 RSA *rsa;
2315 #endif
2316 #ifndef OPENSSL_NO_DH
2317 DH *dh;
2318 #endif
2319
2320 sc=s->session->sess_cert;
2321
2322 if (sc == NULL)
2323 {
2324 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2325 goto err;
2326 }
2327
2328 algs=s->s3->tmp.new_cipher->algorithms;
2329
2330 /* we don't have a certificate */
2331 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2332 return(1);
2333
2334 #ifndef OPENSSL_NO_RSA
2335 rsa=s->session->sess_cert->peer_rsa_tmp;
2336 #endif
2337 #ifndef OPENSSL_NO_DH
2338 dh=s->session->sess_cert->peer_dh_tmp;
2339 #endif
2340
2341 /* This is the passed certificate */
2342
2343 idx=sc->peer_cert_type;
2344 #ifndef OPENSSL_NO_ECDH
2345 if (idx == SSL_PKEY_ECC)
2346 {
2347 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2348 s->s3->tmp.new_cipher) == 0)
2349 { /* check failed */
2350 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2351 goto f_err;
2352 }
2353 else
2354 {
2355 return 1;
2356 }
2357 }
2358 #endif
2359 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2360 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2361 EVP_PKEY_free(pkey);
2362
2363
2364 /* Check that we have a certificate if we require one */
2365 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2366 {
2367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2368 goto f_err;
2369 }
2370 #ifndef OPENSSL_NO_DSA
2371 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2372 {
2373 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2374 goto f_err;
2375 }
2376 #endif
2377 #ifndef OPENSSL_NO_RSA
2378 if ((algs & SSL_kRSA) &&
2379 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2380 {
2381 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2382 goto f_err;
2383 }
2384 #endif
2385 #ifndef OPENSSL_NO_DH
2386 if ((algs & SSL_kEDH) &&
2387 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2388 {
2389 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2390 goto f_err;
2391 }
2392 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2393 {
2394 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2395 goto f_err;
2396 }
2397 #ifndef OPENSSL_NO_DSA
2398 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2399 {
2400 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2401 goto f_err;
2402 }
2403 #endif
2404 #endif
2405
2406 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2407 {
2408 #ifndef OPENSSL_NO_RSA
2409 if (algs & SSL_kRSA)
2410 {
2411 if (rsa == NULL
2412 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2413 {
2414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2415 goto f_err;
2416 }
2417 }
2418 else
2419 #endif
2420 #ifndef OPENSSL_NO_DH
2421 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2422 {
2423 if (dh == NULL
2424 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2425 {
2426 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2427 goto f_err;
2428 }
2429 }
2430 else
2431 #endif
2432 {
2433 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2434 goto f_err;
2435 }
2436 }
2437 return(1);
2438 f_err:
2439 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2440 err:
2441 return(0);
2442 }
2443
2444
2445 #ifndef OPENSSL_NO_ECDH
2446 /* This is the complement of nid2curve_id in s3_srvr.c. */
2447 static int curve_id2nid(int curve_id)
2448 {
2449 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2450 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2451 static int nid_list[26] =
2452 {
2453 0,
2454 NID_sect163k1, /* sect163k1 (1) */
2455 NID_sect163r1, /* sect163r1 (2) */
2456 NID_sect163r2, /* sect163r2 (3) */
2457 NID_sect193r1, /* sect193r1 (4) */
2458 NID_sect193r2, /* sect193r2 (5) */
2459 NID_sect233k1, /* sect233k1 (6) */
2460 NID_sect233r1, /* sect233r1 (7) */
2461 NID_sect239k1, /* sect239k1 (8) */
2462 NID_sect283k1, /* sect283k1 (9) */
2463 NID_sect283r1, /* sect283r1 (10) */
2464 NID_sect409k1, /* sect409k1 (11) */
2465 NID_sect409r1, /* sect409r1 (12) */
2466 NID_sect571k1, /* sect571k1 (13) */
2467 NID_sect571r1, /* sect571r1 (14) */
2468 NID_secp160k1, /* secp160k1 (15) */
2469 NID_secp160r1, /* secp160r1 (16) */
2470 NID_secp160r2, /* secp160r2 (17) */
2471 NID_secp192k1, /* secp192k1 (18) */
2472 NID_X9_62_prime192v1, /* secp192r1 (19) */
2473 NID_secp224k1, /* secp224k1 (20) */
2474 NID_secp224r1, /* secp224r1 (21) */
2475 NID_secp256k1, /* secp256k1 (22) */
2476 NID_X9_62_prime256v1, /* secp256r1 (23) */
2477 NID_secp384r1, /* secp384r1 (24) */
2478 NID_secp521r1 /* secp521r1 (25) */
2479 };
2480
2481 if ((curve_id < 1) || (curve_id > 25)) return 0;
2482
2483 return nid_list[curve_id];
2484 }
2485 #endif
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