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Ignore machine-check MSRs
[freebsd-src/fkvm-freebsd.git] / crypto / openssl / ssl / s3_clnt.c
blob278be82294cde73236c1d9c8c4262a2b2088e4d5
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 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 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 if (s->hit)
259 s->state=SSL3_ST_CR_FINISHED_A;
260 else
261 s->state=SSL3_ST_CR_CERT_A;
262 s->init_num=0;
263 break;
264
265 case SSL3_ST_CR_CERT_A:
266 case SSL3_ST_CR_CERT_B:
267 /* Check if it is anon DH/ECDH */
268 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
269 {
270 ret=ssl3_get_server_certificate(s);
271 if (ret <= 0) goto end;
272 }
273 else
274 skip=1;
275 s->state=SSL3_ST_CR_KEY_EXCH_A;
276 s->init_num=0;
277 break;
278
279 case SSL3_ST_CR_KEY_EXCH_A:
280 case SSL3_ST_CR_KEY_EXCH_B:
281 ret=ssl3_get_key_exchange(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_CERT_REQ_A;
284 s->init_num=0;
285
286 /* at this point we check that we have the
287 * required stuff from the server */
288 if (!ssl3_check_cert_and_algorithm(s))
289 {
290 ret= -1;
291 goto end;
292 }
293 break;
294
295 case SSL3_ST_CR_CERT_REQ_A:
296 case SSL3_ST_CR_CERT_REQ_B:
297 ret=ssl3_get_certificate_request(s);
298 if (ret <= 0) goto end;
299 s->state=SSL3_ST_CR_SRVR_DONE_A;
300 s->init_num=0;
301 break;
302
303 case SSL3_ST_CR_SRVR_DONE_A:
304 case SSL3_ST_CR_SRVR_DONE_B:
305 ret=ssl3_get_server_done(s);
306 if (ret <= 0) goto end;
307 if (s->s3->tmp.cert_req)
308 s->state=SSL3_ST_CW_CERT_A;
309 else
310 s->state=SSL3_ST_CW_KEY_EXCH_A;
311 s->init_num=0;
312
313 break;
314
315 case SSL3_ST_CW_CERT_A:
316 case SSL3_ST_CW_CERT_B:
317 case SSL3_ST_CW_CERT_C:
318 case SSL3_ST_CW_CERT_D:
319 ret=ssl3_send_client_certificate(s);
320 if (ret <= 0) goto end;
321 s->state=SSL3_ST_CW_KEY_EXCH_A;
322 s->init_num=0;
323 break;
324
325 case SSL3_ST_CW_KEY_EXCH_A:
326 case SSL3_ST_CW_KEY_EXCH_B:
327 ret=ssl3_send_client_key_exchange(s);
328 if (ret <= 0) goto end;
329 l=s->s3->tmp.new_cipher->algorithms;
330 /* EAY EAY EAY need to check for DH fix cert
331 * sent back */
332 /* For TLS, cert_req is set to 2, so a cert chain
333 * of nothing is sent, but no verify packet is sent */
334 /* XXX: For now, we do not support client
335 * authentication in ECDH cipher suites with
336 * ECDH (rather than ECDSA) certificates.
337 * We need to skip the certificate verify
338 * message when client's ECDH public key is sent
339 * inside the client certificate.
340 */
341 if (s->s3->tmp.cert_req == 1)
342 {
343 s->state=SSL3_ST_CW_CERT_VRFY_A;
344 }
345 else
346 {
347 s->state=SSL3_ST_CW_CHANGE_A;
348 s->s3->change_cipher_spec=0;
349 }
350
351 s->init_num=0;
352 break;
353
354 case SSL3_ST_CW_CERT_VRFY_A:
355 case SSL3_ST_CW_CERT_VRFY_B:
356 ret=ssl3_send_client_verify(s);
357 if (ret <= 0) goto end;
358 s->state=SSL3_ST_CW_CHANGE_A;
359 s->init_num=0;
360 s->s3->change_cipher_spec=0;
361 break;
362
363 case SSL3_ST_CW_CHANGE_A:
364 case SSL3_ST_CW_CHANGE_B:
365 ret=ssl3_send_change_cipher_spec(s,
366 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
367 if (ret <= 0) goto end;
368 s->state=SSL3_ST_CW_FINISHED_A;
369 s->init_num=0;
370
371 s->session->cipher=s->s3->tmp.new_cipher;
372 #ifdef OPENSSL_NO_COMP
373 s->session->compress_meth=0;
374 #else
375 if (s->s3->tmp.new_compression == NULL)
376 s->session->compress_meth=0;
377 else
378 s->session->compress_meth=
379 s->s3->tmp.new_compression->id;
380 #endif
381 if (!s->method->ssl3_enc->setup_key_block(s))
382 {
383 ret= -1;
384 goto end;
385 }
386
387 if (!s->method->ssl3_enc->change_cipher_state(s,
388 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
389 {
390 ret= -1;
391 goto end;
392 }
393
394 break;
395
396 case SSL3_ST_CW_FINISHED_A:
397 case SSL3_ST_CW_FINISHED_B:
398 ret=ssl3_send_finished(s,
399 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
400 s->method->ssl3_enc->client_finished_label,
401 s->method->ssl3_enc->client_finished_label_len);
402 if (ret <= 0) goto end;
403 s->state=SSL3_ST_CW_FLUSH;
404
405 /* clear flags */
406 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
407 if (s->hit)
408 {
409 s->s3->tmp.next_state=SSL_ST_OK;
410 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
411 {
412 s->state=SSL_ST_OK;
413 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
414 s->s3->delay_buf_pop_ret=0;
415 }
416 }
417 else
418 {
419 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
420 }
421 s->init_num=0;
422 break;
423
424 case SSL3_ST_CR_FINISHED_A:
425 case SSL3_ST_CR_FINISHED_B:
426
427 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
428 SSL3_ST_CR_FINISHED_B);
429 if (ret <= 0) goto end;
430
431 if (s->hit)
432 s->state=SSL3_ST_CW_CHANGE_A;
433 else
434 s->state=SSL_ST_OK;
435 s->init_num=0;
436 break;
437
438 case SSL3_ST_CW_FLUSH:
439 /* number of bytes to be flushed */
440 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
441 if (num1 > 0)
442 {
443 s->rwstate=SSL_WRITING;
444 num1=BIO_flush(s->wbio);
445 if (num1 <= 0) { ret= -1; goto end; }
446 s->rwstate=SSL_NOTHING;
447 }
448
449 s->state=s->s3->tmp.next_state;
450 break;
451
452 case SSL_ST_OK:
453 /* clean a few things up */
454 ssl3_cleanup_key_block(s);
455
456 if (s->init_buf != NULL)
457 {
458 BUF_MEM_free(s->init_buf);
459 s->init_buf=NULL;
460 }
461
462 /* If we are not 'joining' the last two packets,
463 * remove the buffering now */
464 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
465 ssl_free_wbio_buffer(s);
466 /* else do it later in ssl3_write */
467
468 s->init_num=0;
469 s->new_session=0;
470
471 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
472 if (s->hit) s->ctx->stats.sess_hit++;
473
474 ret=1;
475 /* s->server=0; */
476 s->handshake_func=ssl3_connect;
477 s->ctx->stats.sess_connect_good++;
478
479 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
480
481 goto end;
482 /* break; */
483
484 default:
485 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
486 ret= -1;
487 goto end;
488 /* break; */
489 }
490
491 /* did we do anything */
492 if (!s->s3->tmp.reuse_message && !skip)
493 {
494 if (s->debug)
495 {
496 if ((ret=BIO_flush(s->wbio)) <= 0)
497 goto end;
498 }
499
500 if ((cb != NULL) && (s->state != state))
501 {
502 new_state=s->state;
503 s->state=state;
504 cb(s,SSL_CB_CONNECT_LOOP,1);
505 s->state=new_state;
506 }
507 }
508 skip=0;
509 }
510 end:
511 s->in_handshake--;
512 if (buf != NULL)
513 BUF_MEM_free(buf);
514 if (cb != NULL)
515 cb(s,SSL_CB_CONNECT_EXIT,ret);
516 return(ret);
517 }
518
519
520 int ssl3_client_hello(SSL *s)
521 {
522 unsigned char *buf;
523 unsigned char *p,*d;
524 int i;
525 unsigned long Time,l;
526 #ifndef OPENSSL_NO_COMP
527 int j;
528 SSL_COMP *comp;
529 #endif
530
531 buf=(unsigned char *)s->init_buf->data;
532 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
533 {
534 if ((s->session == NULL) ||
535 (s->session->ssl_version != s->version) ||
536 (s->session->not_resumable))
537 {
538 if (!ssl_get_new_session(s,0))
539 goto err;
540 }
541 /* else use the pre-loaded session */
542
543 p=s->s3->client_random;
544 Time=(unsigned long)time(NULL); /* Time */
545 l2n(Time,p);
546 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
547 goto err;
548
549 /* Do the message type and length last */
550 d=p= &(buf[4]);
551
552 *(p++)=s->version>>8;
553 *(p++)=s->version&0xff;
554 s->client_version=s->version;
555
556 /* Random stuff */
557 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
558 p+=SSL3_RANDOM_SIZE;
559
560 /* Session ID */
561 if (s->new_session)
562 i=0;
563 else
564 i=s->session->session_id_length;
565 *(p++)=i;
566 if (i != 0)
567 {
568 if (i > (int)sizeof(s->session->session_id))
569 {
570 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
571 goto err;
572 }
573 memcpy(p,s->session->session_id,i);
574 p+=i;
575 }
576
577 /* Ciphers supported */
578 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
579 if (i == 0)
580 {
581 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
582 goto err;
583 }
584 s2n(i,p);
585 p+=i;
586
587 /* COMPRESSION */
588 #ifdef OPENSSL_NO_COMP
589 *(p++)=1;
590 #else
591 if (s->ctx->comp_methods == NULL)
592 j=0;
593 else
594 j=sk_SSL_COMP_num(s->ctx->comp_methods);
595 *(p++)=1+j;
596 for (i=0; i<j; i++)
597 {
598 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
599 *(p++)=comp->id;
600 }
601 #endif
602 *(p++)=0; /* Add the NULL method */
603
604 l=(p-d);
605 d=buf;
606 *(d++)=SSL3_MT_CLIENT_HELLO;
607 l2n3(l,d);
608
609 s->state=SSL3_ST_CW_CLNT_HELLO_B;
610 /* number of bytes to write */
611 s->init_num=p-buf;
612 s->init_off=0;
613 }
614
615 /* SSL3_ST_CW_CLNT_HELLO_B */
616 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
617 err:
618 return(-1);
619 }
620
621 int ssl3_get_server_hello(SSL *s)
622 {
623 STACK_OF(SSL_CIPHER) *sk;
624 SSL_CIPHER *c;
625 unsigned char *p,*d;
626 int i,al,ok;
627 unsigned int j;
628 long n;
629 #ifndef OPENSSL_NO_COMP
630 SSL_COMP *comp;
631 #endif
632
633 n=s->method->ssl_get_message(s,
634 SSL3_ST_CR_SRVR_HELLO_A,
635 SSL3_ST_CR_SRVR_HELLO_B,
636 -1,
637 300, /* ?? */
638 &ok);
639
640 if (!ok) return((int)n);
641
642 if ( SSL_version(s) == DTLS1_VERSION)
643 {
644 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
645 {
646 if ( s->d1->send_cookie == 0)
647 {
648 s->s3->tmp.reuse_message = 1;
649 return 1;
650 }
651 else /* already sent a cookie */
652 {
653 al=SSL_AD_UNEXPECTED_MESSAGE;
654 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
655 goto f_err;
656 }
657 }
658 }
659
660 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
661 {
662 al=SSL_AD_UNEXPECTED_MESSAGE;
663 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
664 goto f_err;
665 }
666
667 d=p=(unsigned char *)s->init_msg;
668
669 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
670 {
671 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
672 s->version=(s->version&0xff00)|p[1];
673 al=SSL_AD_PROTOCOL_VERSION;
674 goto f_err;
675 }
676 p+=2;
677
678 /* load the server hello data */
679 /* load the server random */
680 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
681 p+=SSL3_RANDOM_SIZE;
682
683 /* get the session-id */
684 j= *(p++);
685
686 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
687 {
688 al=SSL_AD_ILLEGAL_PARAMETER;
689 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
690 goto f_err;
691 }
692
693 if (j != 0 && j == s->session->session_id_length
694 && memcmp(p,s->session->session_id,j) == 0)
695 {
696 if(s->sid_ctx_length != s->session->sid_ctx_length
697 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
698 {
699 /* actually a client application bug */
700 al=SSL_AD_ILLEGAL_PARAMETER;
701 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
702 goto f_err;
703 }
704 s->hit=1;
705 }
706 else /* a miss or crap from the other end */
707 {
708 /* If we were trying for session-id reuse, make a new
709 * SSL_SESSION so we don't stuff up other people */
710 s->hit=0;
711 if (s->session->session_id_length > 0)
712 {
713 if (!ssl_get_new_session(s,0))
714 {
715 al=SSL_AD_INTERNAL_ERROR;
716 goto f_err;
717 }
718 }
719 s->session->session_id_length=j;
720 memcpy(s->session->session_id,p,j); /* j could be 0 */
721 }
722 p+=j;
723 c=ssl_get_cipher_by_char(s,p);
724 if (c == NULL)
725 {
726 /* unknown cipher */
727 al=SSL_AD_ILLEGAL_PARAMETER;
728 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
729 goto f_err;
730 }
731 p+=ssl_put_cipher_by_char(s,NULL,NULL);
732
733 sk=ssl_get_ciphers_by_id(s);
734 i=sk_SSL_CIPHER_find(sk,c);
735 if (i < 0)
736 {
737 /* we did not say we would use this cipher */
738 al=SSL_AD_ILLEGAL_PARAMETER;
739 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
740 goto f_err;
741 }
742
743 /* Depending on the session caching (internal/external), the cipher
744 and/or cipher_id values may not be set. Make sure that
745 cipher_id is set and use it for comparison. */
746 if (s->session->cipher)
747 s->session->cipher_id = s->session->cipher->id;
748 if (s->hit && (s->session->cipher_id != c->id))
749 {
750 if (!(s->options &
751 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
752 {
753 al=SSL_AD_ILLEGAL_PARAMETER;
754 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
755 goto f_err;
756 }
757 }
758 s->s3->tmp.new_cipher=c;
759
760 /* lets get the compression algorithm */
761 /* COMPRESSION */
762 #ifdef OPENSSL_NO_COMP
763 if (*(p++) != 0)
764 {
765 al=SSL_AD_ILLEGAL_PARAMETER;
766 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
767 goto f_err;
768 }
769 #else
770 j= *(p++);
771 if (j == 0)
772 comp=NULL;
773 else
774 comp=ssl3_comp_find(s->ctx->comp_methods,j);
775
776 if ((j != 0) && (comp == NULL))
777 {
778 al=SSL_AD_ILLEGAL_PARAMETER;
779 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
780 goto f_err;
781 }
782 else
783 {
784 s->s3->tmp.new_compression=comp;
785 }
786 #endif
787
788 if (p != (d+n))
789 {
790 /* wrong packet length */
791 al=SSL_AD_DECODE_ERROR;
792 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
793 goto err;
794 }
795
796 return(1);
797 f_err:
798 ssl3_send_alert(s,SSL3_AL_FATAL,al);
799 err:
800 return(-1);
801 }
802
803 int ssl3_get_server_certificate(SSL *s)
804 {
805 int al,i,ok,ret= -1;
806 unsigned long n,nc,llen,l;
807 X509 *x=NULL;
808 const unsigned char *q,*p;
809 unsigned char *d;
810 STACK_OF(X509) *sk=NULL;
811 SESS_CERT *sc;
812 EVP_PKEY *pkey=NULL;
813 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
814
815 n=s->method->ssl_get_message(s,
816 SSL3_ST_CR_CERT_A,
817 SSL3_ST_CR_CERT_B,
818 -1,
819 s->max_cert_list,
820 &ok);
821
822 if (!ok) return((int)n);
823
824 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
825 {
826 s->s3->tmp.reuse_message=1;
827 return(1);
828 }
829
830 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
831 {
832 al=SSL_AD_UNEXPECTED_MESSAGE;
833 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
834 goto f_err;
835 }
836 p=d=(unsigned char *)s->init_msg;
837
838 if ((sk=sk_X509_new_null()) == NULL)
839 {
840 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
841 goto err;
842 }
843
844 n2l3(p,llen);
845 if (llen+3 != n)
846 {
847 al=SSL_AD_DECODE_ERROR;
848 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
849 goto f_err;
850 }
851 for (nc=0; nc<llen; )
852 {
853 n2l3(p,l);
854 if ((l+nc+3) > llen)
855 {
856 al=SSL_AD_DECODE_ERROR;
857 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
858 goto f_err;
859 }
860
861 q=p;
862 x=d2i_X509(NULL,&q,l);
863 if (x == NULL)
864 {
865 al=SSL_AD_BAD_CERTIFICATE;
866 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
867 goto f_err;
868 }
869 if (q != (p+l))
870 {
871 al=SSL_AD_DECODE_ERROR;
872 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
873 goto f_err;
874 }
875 if (!sk_X509_push(sk,x))
876 {
877 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
878 goto err;
879 }
880 x=NULL;
881 nc+=l+3;
882 p=q;
883 }
884
885 i=ssl_verify_cert_chain(s,sk);
886 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
887 #ifndef OPENSSL_NO_KRB5
888 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
889 != (SSL_aKRB5|SSL_kKRB5)
890 #endif /* OPENSSL_NO_KRB5 */
891 )
892 {
893 al=ssl_verify_alarm_type(s->verify_result);
894 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
895 goto f_err;
896 }
897 ERR_clear_error(); /* but we keep s->verify_result */
898
899 sc=ssl_sess_cert_new();
900 if (sc == NULL) goto err;
901
902 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
903 s->session->sess_cert=sc;
904
905 sc->cert_chain=sk;
906 /* Inconsistency alert: cert_chain does include the peer's
907 * certificate, which we don't include in s3_srvr.c */
908 x=sk_X509_value(sk,0);
909 sk=NULL;
910 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
911
912 pkey=X509_get_pubkey(x);
913
914 /* VRS: allow null cert if auth == KRB5 */
915 need_cert = ((s->s3->tmp.new_cipher->algorithms
916 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
917 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
918
919 #ifdef KSSL_DEBUG
920 printf("pkey,x = %p, %p\n", pkey,x);
921 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
922 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
923 s->s3->tmp.new_cipher->algorithms, need_cert);
924 #endif /* KSSL_DEBUG */
925
926 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
927 {
928 x=NULL;
929 al=SSL3_AL_FATAL;
930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
931 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
932 goto f_err;
933 }
934
935 i=ssl_cert_type(x,pkey);
936 if (need_cert && i < 0)
937 {
938 x=NULL;
939 al=SSL3_AL_FATAL;
940 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
941 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
942 goto f_err;
943 }
944
945 if (need_cert)
946 {
947 sc->peer_cert_type=i;
948 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
949 /* Why would the following ever happen?
950 * We just created sc a couple of lines ago. */
951 if (sc->peer_pkeys[i].x509 != NULL)
952 X509_free(sc->peer_pkeys[i].x509);
953 sc->peer_pkeys[i].x509=x;
954 sc->peer_key= &(sc->peer_pkeys[i]);
955
956 if (s->session->peer != NULL)
957 X509_free(s->session->peer);
958 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
959 s->session->peer=x;
960 }
961 else
962 {
963 sc->peer_cert_type=i;
964 sc->peer_key= NULL;
965
966 if (s->session->peer != NULL)
967 X509_free(s->session->peer);
968 s->session->peer=NULL;
969 }
970 s->session->verify_result = s->verify_result;
971
972 x=NULL;
973 ret=1;
974
975 if (0)
976 {
977 f_err:
978 ssl3_send_alert(s,SSL3_AL_FATAL,al);
979 }
980 err:
981 EVP_PKEY_free(pkey);
982 X509_free(x);
983 sk_X509_pop_free(sk,X509_free);
984 return(ret);
985 }
986
987 int ssl3_get_key_exchange(SSL *s)
988 {
989 #ifndef OPENSSL_NO_RSA
990 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
991 #endif
992 EVP_MD_CTX md_ctx;
993 unsigned char *param,*p;
994 int al,i,j,param_len,ok;
995 long n,alg;
996 EVP_PKEY *pkey=NULL;
997 #ifndef OPENSSL_NO_RSA
998 RSA *rsa=NULL;
999 #endif
1000 #ifndef OPENSSL_NO_DH
1001 DH *dh=NULL;
1002 #endif
1003 #ifndef OPENSSL_NO_ECDH
1004 EC_KEY *ecdh = NULL;
1005 BN_CTX *bn_ctx = NULL;
1006 EC_POINT *srvr_ecpoint = NULL;
1007 int curve_nid = 0;
1008 int encoded_pt_len = 0;
1009 #endif
1010
1011 /* use same message size as in ssl3_get_certificate_request()
1012 * as ServerKeyExchange message may be skipped */
1013 n=s->method->ssl_get_message(s,
1014 SSL3_ST_CR_KEY_EXCH_A,
1015 SSL3_ST_CR_KEY_EXCH_B,
1016 -1,
1017 s->max_cert_list,
1018 &ok);
1019
1020 if (!ok) return((int)n);
1021
1022 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1023 {
1024 s->s3->tmp.reuse_message=1;
1025 return(1);
1026 }
1027
1028 param=p=(unsigned char *)s->init_msg;
1029
1030 if (s->session->sess_cert != NULL)
1031 {
1032 #ifndef OPENSSL_NO_RSA
1033 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1034 {
1035 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1036 s->session->sess_cert->peer_rsa_tmp=NULL;
1037 }
1038 #endif
1039 #ifndef OPENSSL_NO_DH
1040 if (s->session->sess_cert->peer_dh_tmp)
1041 {
1042 DH_free(s->session->sess_cert->peer_dh_tmp);
1043 s->session->sess_cert->peer_dh_tmp=NULL;
1044 }
1045 #endif
1046 #ifndef OPENSSL_NO_ECDH
1047 if (s->session->sess_cert->peer_ecdh_tmp)
1048 {
1049 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1050 s->session->sess_cert->peer_ecdh_tmp=NULL;
1051 }
1052 #endif
1053 }
1054 else
1055 {
1056 s->session->sess_cert=ssl_sess_cert_new();
1057 }
1058
1059 param_len=0;
1060 alg=s->s3->tmp.new_cipher->algorithms;
1061 EVP_MD_CTX_init(&md_ctx);
1062
1063 #ifndef OPENSSL_NO_RSA
1064 if (alg & SSL_kRSA)
1065 {
1066 if ((rsa=RSA_new()) == NULL)
1067 {
1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1069 goto err;
1070 }
1071 n2s(p,i);
1072 param_len=i+2;
1073 if (param_len > n)
1074 {
1075 al=SSL_AD_DECODE_ERROR;
1076 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1077 goto f_err;
1078 }
1079 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1080 {
1081 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1082 goto err;
1083 }
1084 p+=i;
1085
1086 n2s(p,i);
1087 param_len+=i+2;
1088 if (param_len > n)
1089 {
1090 al=SSL_AD_DECODE_ERROR;
1091 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1092 goto f_err;
1093 }
1094 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1095 {
1096 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1097 goto err;
1098 }
1099 p+=i;
1100 n-=param_len;
1101
1102 /* this should be because we are using an export cipher */
1103 if (alg & SSL_aRSA)
1104 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1105 else
1106 {
1107 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1108 goto err;
1109 }
1110 s->session->sess_cert->peer_rsa_tmp=rsa;
1111 rsa=NULL;
1112 }
1113 #else /* OPENSSL_NO_RSA */
1114 if (0)
1115 ;
1116 #endif
1117 #ifndef OPENSSL_NO_DH
1118 else if (alg & SSL_kEDH)
1119 {
1120 if ((dh=DH_new()) == NULL)
1121 {
1122 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1123 goto err;
1124 }
1125 n2s(p,i);
1126 param_len=i+2;
1127 if (param_len > n)
1128 {
1129 al=SSL_AD_DECODE_ERROR;
1130 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1131 goto f_err;
1132 }
1133 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1134 {
1135 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1136 goto err;
1137 }
1138 p+=i;
1139
1140 n2s(p,i);
1141 param_len+=i+2;
1142 if (param_len > n)
1143 {
1144 al=SSL_AD_DECODE_ERROR;
1145 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1146 goto f_err;
1147 }
1148 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1149 {
1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1151 goto err;
1152 }
1153 p+=i;
1154
1155 n2s(p,i);
1156 param_len+=i+2;
1157 if (param_len > n)
1158 {
1159 al=SSL_AD_DECODE_ERROR;
1160 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1161 goto f_err;
1162 }
1163 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1164 {
1165 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1166 goto err;
1167 }
1168 p+=i;
1169 n-=param_len;
1170
1171 #ifndef OPENSSL_NO_RSA
1172 if (alg & SSL_aRSA)
1173 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1174 #else
1175 if (0)
1176 ;
1177 #endif
1178 #ifndef OPENSSL_NO_DSA
1179 else if (alg & SSL_aDSS)
1180 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1181 #endif
1182 /* else anonymous DH, so no certificate or pkey. */
1183
1184 s->session->sess_cert->peer_dh_tmp=dh;
1185 dh=NULL;
1186 }
1187 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1188 {
1189 al=SSL_AD_ILLEGAL_PARAMETER;
1190 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1191 goto f_err;
1192 }
1193 #endif /* !OPENSSL_NO_DH */
1194
1195 #ifndef OPENSSL_NO_ECDH
1196 else if (alg & SSL_kECDHE)
1197 {
1198 EC_GROUP *ngroup;
1199 const EC_GROUP *group;
1200
1201 if ((ecdh=EC_KEY_new()) == NULL)
1202 {
1203 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1204 goto err;
1205 }
1206
1207 /* Extract elliptic curve parameters and the
1208 * server's ephemeral ECDH public key.
1209 * Keep accumulating lengths of various components in
1210 * param_len and make sure it never exceeds n.
1211 */
1212
1213 /* XXX: For now we only support named (not generic) curves
1214 * and the ECParameters in this case is just three bytes.
1215 */
1216 param_len=3;
1217 if ((param_len > n) ||
1218 (*p != NAMED_CURVE_TYPE) ||
1219 ((curve_nid = curve_id2nid(*(p + 2))) == 0))
1220 {
1221 al=SSL_AD_INTERNAL_ERROR;
1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1223 goto f_err;
1224 }
1225
1226 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1227 if (ngroup == NULL)
1228 {
1229 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1230 goto err;
1231 }
1232 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1233 {
1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1235 goto err;
1236 }
1237 EC_GROUP_free(ngroup);
1238
1239 group = EC_KEY_get0_group(ecdh);
1240
1241 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1242 (EC_GROUP_get_degree(group) > 163))
1243 {
1244 al=SSL_AD_EXPORT_RESTRICTION;
1245 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1246 goto f_err;
1247 }
1248
1249 p+=3;
1250
1251 /* Next, get the encoded ECPoint */
1252 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1253 ((bn_ctx = BN_CTX_new()) == NULL))
1254 {
1255 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1256 goto err;
1257 }
1258
1259 encoded_pt_len = *p; /* length of encoded point */
1260 p+=1;
1261 param_len += (1 + encoded_pt_len);
1262 if ((param_len > n) ||
1263 (EC_POINT_oct2point(group, srvr_ecpoint,
1264 p, encoded_pt_len, bn_ctx) == 0))
1265 {
1266 al=SSL_AD_DECODE_ERROR;
1267 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1268 goto f_err;
1269 }
1270
1271 n-=param_len;
1272 p+=encoded_pt_len;
1273
1274 /* The ECC/TLS specification does not mention
1275 * the use of DSA to sign ECParameters in the server
1276 * key exchange message. We do support RSA and ECDSA.
1277 */
1278 if (0) ;
1279 #ifndef OPENSSL_NO_RSA
1280 else if (alg & SSL_aRSA)
1281 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1282 #endif
1283 #ifndef OPENSSL_NO_ECDSA
1284 else if (alg & SSL_aECDSA)
1285 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1286 #endif
1287 /* else anonymous ECDH, so no certificate or pkey. */
1288 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1289 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1290 ecdh=NULL;
1291 BN_CTX_free(bn_ctx);
1292 EC_POINT_free(srvr_ecpoint);
1293 srvr_ecpoint = NULL;
1294 }
1295 else if (alg & SSL_kECDH)
1296 {
1297 al=SSL_AD_UNEXPECTED_MESSAGE;
1298 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1299 goto f_err;
1300 }
1301 #endif /* !OPENSSL_NO_ECDH */
1302 if (alg & SSL_aFZA)
1303 {
1304 al=SSL_AD_HANDSHAKE_FAILURE;
1305 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1306 goto f_err;
1307 }
1308
1309
1310 /* p points to the next byte, there are 'n' bytes left */
1311
1312 /* if it was signed, check the signature */
1313 if (pkey != NULL)
1314 {
1315 n2s(p,i);
1316 n-=2;
1317 j=EVP_PKEY_size(pkey);
1318
1319 if ((i != n) || (n > j) || (n <= 0))
1320 {
1321 /* wrong packet length */
1322 al=SSL_AD_DECODE_ERROR;
1323 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1324 goto f_err;
1325 }
1326
1327 #ifndef OPENSSL_NO_RSA
1328 if (pkey->type == EVP_PKEY_RSA)
1329 {
1330 int num;
1331
1332 j=0;
1333 q=md_buf;
1334 for (num=2; num > 0; num--)
1335 {
1336 EVP_DigestInit_ex(&md_ctx,(num == 2)
1337 ?s->ctx->md5:s->ctx->sha1, NULL);
1338 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1339 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1340 EVP_DigestUpdate(&md_ctx,param,param_len);
1341 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1342 q+=i;
1343 j+=i;
1344 }
1345 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1346 pkey->pkey.rsa);
1347 if (i < 0)
1348 {
1349 al=SSL_AD_DECRYPT_ERROR;
1350 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1351 goto f_err;
1352 }
1353 if (i == 0)
1354 {
1355 /* bad signature */
1356 al=SSL_AD_DECRYPT_ERROR;
1357 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1358 goto f_err;
1359 }
1360 }
1361 else
1362 #endif
1363 #ifndef OPENSSL_NO_DSA
1364 if (pkey->type == EVP_PKEY_DSA)
1365 {
1366 /* lets do DSS */
1367 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1368 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1369 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1370 EVP_VerifyUpdate(&md_ctx,param,param_len);
1371 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1372 {
1373 /* bad signature */
1374 al=SSL_AD_DECRYPT_ERROR;
1375 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1376 goto f_err;
1377 }
1378 }
1379 else
1380 #endif
1381 #ifndef OPENSSL_NO_ECDSA
1382 if (pkey->type == EVP_PKEY_EC)
1383 {
1384 /* let's do ECDSA */
1385 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1386 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1387 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1388 EVP_VerifyUpdate(&md_ctx,param,param_len);
1389 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1390 {
1391 /* bad signature */
1392 al=SSL_AD_DECRYPT_ERROR;
1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1394 goto f_err;
1395 }
1396 }
1397 else
1398 #endif
1399 {
1400 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1401 goto err;
1402 }
1403 }
1404 else
1405 {
1406 /* still data left over */
1407 if (!(alg & SSL_aNULL))
1408 {
1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1410 goto err;
1411 }
1412 if (n != 0)
1413 {
1414 al=SSL_AD_DECODE_ERROR;
1415 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1416 goto f_err;
1417 }
1418 }
1419 EVP_PKEY_free(pkey);
1420 EVP_MD_CTX_cleanup(&md_ctx);
1421 return(1);
1422 f_err:
1423 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1424 err:
1425 EVP_PKEY_free(pkey);
1426 #ifndef OPENSSL_NO_RSA
1427 if (rsa != NULL)
1428 RSA_free(rsa);
1429 #endif
1430 #ifndef OPENSSL_NO_DH
1431 if (dh != NULL)
1432 DH_free(dh);
1433 #endif
1434 #ifndef OPENSSL_NO_ECDH
1435 BN_CTX_free(bn_ctx);
1436 EC_POINT_free(srvr_ecpoint);
1437 if (ecdh != NULL)
1438 EC_KEY_free(ecdh);
1439 #endif
1440 EVP_MD_CTX_cleanup(&md_ctx);
1441 return(-1);
1442 }
1443
1444 int ssl3_get_certificate_request(SSL *s)
1445 {
1446 int ok,ret=0;
1447 unsigned long n,nc,l;
1448 unsigned int llen,ctype_num,i;
1449 X509_NAME *xn=NULL;
1450 const unsigned char *p,*q;
1451 unsigned char *d;
1452 STACK_OF(X509_NAME) *ca_sk=NULL;
1453
1454 n=s->method->ssl_get_message(s,
1455 SSL3_ST_CR_CERT_REQ_A,
1456 SSL3_ST_CR_CERT_REQ_B,
1457 -1,
1458 s->max_cert_list,
1459 &ok);
1460
1461 if (!ok) return((int)n);
1462
1463 s->s3->tmp.cert_req=0;
1464
1465 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1466 {
1467 s->s3->tmp.reuse_message=1;
1468 return(1);
1469 }
1470
1471 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1472 {
1473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1474 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1475 goto err;
1476 }
1477
1478 /* TLS does not like anon-DH with client cert */
1479 if (s->version > SSL3_VERSION)
1480 {
1481 l=s->s3->tmp.new_cipher->algorithms;
1482 if (l & SSL_aNULL)
1483 {
1484 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1485 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1486 goto err;
1487 }
1488 }
1489
1490 p=d=(unsigned char *)s->init_msg;
1491
1492 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1493 {
1494 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1495 goto err;
1496 }
1497
1498 /* get the certificate types */
1499 ctype_num= *(p++);
1500 if (ctype_num > SSL3_CT_NUMBER)
1501 ctype_num=SSL3_CT_NUMBER;
1502 for (i=0; i<ctype_num; i++)
1503 s->s3->tmp.ctype[i]= p[i];
1504 p+=ctype_num;
1505
1506 /* get the CA RDNs */
1507 n2s(p,llen);
1508 #if 0
1509 {
1510 FILE *out;
1511 out=fopen("/tmp/vsign.der","w");
1512 fwrite(p,1,llen,out);
1513 fclose(out);
1514 }
1515 #endif
1516
1517 if ((llen+ctype_num+2+1) != n)
1518 {
1519 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1520 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1521 goto err;
1522 }
1523
1524 for (nc=0; nc<llen; )
1525 {
1526 n2s(p,l);
1527 if ((l+nc+2) > llen)
1528 {
1529 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1530 goto cont; /* netscape bugs */
1531 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1532 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1533 goto err;
1534 }
1535
1536 q=p;
1537
1538 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1539 {
1540 /* If netscape tolerance is on, ignore errors */
1541 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1542 goto cont;
1543 else
1544 {
1545 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1546 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1547 goto err;
1548 }
1549 }
1550
1551 if (q != (p+l))
1552 {
1553 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1554 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1555 goto err;
1556 }
1557 if (!sk_X509_NAME_push(ca_sk,xn))
1558 {
1559 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1560 goto err;
1561 }
1562
1563 p+=l;
1564 nc+=l+2;
1565 }
1566
1567 if (0)
1568 {
1569 cont:
1570 ERR_clear_error();
1571 }
1572
1573 /* we should setup a certificate to return.... */
1574 s->s3->tmp.cert_req=1;
1575 s->s3->tmp.ctype_num=ctype_num;
1576 if (s->s3->tmp.ca_names != NULL)
1577 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1578 s->s3->tmp.ca_names=ca_sk;
1579 ca_sk=NULL;
1580
1581 ret=1;
1582 err:
1583 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1584 return(ret);
1585 }
1586
1587 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1588 {
1589 return(X509_NAME_cmp(*a,*b));
1590 }
1591
1592 int ssl3_get_server_done(SSL *s)
1593 {
1594 int ok,ret=0;
1595 long n;
1596
1597 n=s->method->ssl_get_message(s,
1598 SSL3_ST_CR_SRVR_DONE_A,
1599 SSL3_ST_CR_SRVR_DONE_B,
1600 SSL3_MT_SERVER_DONE,
1601 30, /* should be very small, like 0 :-) */
1602 &ok);
1603
1604 if (!ok) return((int)n);
1605 if (n > 0)
1606 {
1607 /* should contain no data */
1608 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1609 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1610 return -1;
1611 }
1612 ret=1;
1613 return(ret);
1614 }
1615
1616
1617 int ssl3_send_client_key_exchange(SSL *s)
1618 {
1619 unsigned char *p,*d;
1620 int n;
1621 unsigned long l;
1622 #ifndef OPENSSL_NO_RSA
1623 unsigned char *q;
1624 EVP_PKEY *pkey=NULL;
1625 #endif
1626 #ifndef OPENSSL_NO_KRB5
1627 KSSL_ERR kssl_err;
1628 #endif /* OPENSSL_NO_KRB5 */
1629 #ifndef OPENSSL_NO_ECDH
1630 EC_KEY *clnt_ecdh = NULL;
1631 const EC_POINT *srvr_ecpoint = NULL;
1632 EVP_PKEY *srvr_pub_pkey = NULL;
1633 unsigned char *encodedPoint = NULL;
1634 int encoded_pt_len = 0;
1635 BN_CTX * bn_ctx = NULL;
1636 #endif
1637
1638 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1639 {
1640 d=(unsigned char *)s->init_buf->data;
1641 p= &(d[4]);
1642
1643 l=s->s3->tmp.new_cipher->algorithms;
1644
1645 /* Fool emacs indentation */
1646 if (0) {}
1647 #ifndef OPENSSL_NO_RSA
1648 else if (l & SSL_kRSA)
1649 {
1650 RSA *rsa;
1651 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1652
1653 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1654 rsa=s->session->sess_cert->peer_rsa_tmp;
1655 else
1656 {
1657 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1658 if ((pkey == NULL) ||
1659 (pkey->type != EVP_PKEY_RSA) ||
1660 (pkey->pkey.rsa == NULL))
1661 {
1662 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1663 goto err;
1664 }
1665 rsa=pkey->pkey.rsa;
1666 EVP_PKEY_free(pkey);
1667 }
1668
1669 tmp_buf[0]=s->client_version>>8;
1670 tmp_buf[1]=s->client_version&0xff;
1671 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1672 goto err;
1673
1674 s->session->master_key_length=sizeof tmp_buf;
1675
1676 q=p;
1677 /* Fix buf for TLS and beyond */
1678 if (s->version > SSL3_VERSION)
1679 p+=2;
1680 n=RSA_public_encrypt(sizeof tmp_buf,
1681 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1682 #ifdef PKCS1_CHECK
1683 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1684 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1685 #endif
1686 if (n <= 0)
1687 {
1688 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1689 goto err;
1690 }
1691
1692 /* Fix buf for TLS and beyond */
1693 if (s->version > SSL3_VERSION)
1694 {
1695 s2n(n,q);
1696 n+=2;
1697 }
1698
1699 s->session->master_key_length=
1700 s->method->ssl3_enc->generate_master_secret(s,
1701 s->session->master_key,
1702 tmp_buf,sizeof tmp_buf);
1703 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1704 }
1705 #endif
1706 #ifndef OPENSSL_NO_KRB5
1707 else if (l & SSL_kKRB5)
1708 {
1709 krb5_error_code krb5rc;
1710 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1711 /* krb5_data krb5_ap_req; */
1712 krb5_data *enc_ticket;
1713 krb5_data authenticator, *authp = NULL;
1714 EVP_CIPHER_CTX ciph_ctx;
1715 EVP_CIPHER *enc = NULL;
1716 unsigned char iv[EVP_MAX_IV_LENGTH];
1717 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1718 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1719 + EVP_MAX_IV_LENGTH];
1720 int padl, outl = sizeof(epms);
1721
1722 EVP_CIPHER_CTX_init(&ciph_ctx);
1723
1724 #ifdef KSSL_DEBUG
1725 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1726 l, SSL_kKRB5);
1727 #endif /* KSSL_DEBUG */
1728
1729 authp = NULL;
1730 #ifdef KRB5SENDAUTH
1731 if (KRB5SENDAUTH) authp = &authenticator;
1732 #endif /* KRB5SENDAUTH */
1733
1734 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1735 &kssl_err);
1736 enc = kssl_map_enc(kssl_ctx->enctype);
1737 if (enc == NULL)
1738 goto err;
1739 #ifdef KSSL_DEBUG
1740 {
1741 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1742 if (krb5rc && kssl_err.text)
1743 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1744 }
1745 #endif /* KSSL_DEBUG */
1746
1747 if (krb5rc)
1748 {
1749 ssl3_send_alert(s,SSL3_AL_FATAL,
1750 SSL_AD_HANDSHAKE_FAILURE);
1751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1752 kssl_err.reason);
1753 goto err;
1754 }
1755
1756 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1757 ** in place of RFC 2712 KerberosWrapper, as in:
1758 **
1759 ** Send ticket (copy to *p, set n = length)
1760 ** n = krb5_ap_req.length;
1761 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1762 ** if (krb5_ap_req.data)
1763 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1764 **
1765 ** Now using real RFC 2712 KerberosWrapper
1766 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1767 ** Note: 2712 "opaque" types are here replaced
1768 ** with a 2-byte length followed by the value.
1769 ** Example:
1770 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1771 ** Where "xx xx" = length bytes. Shown here with
1772 ** optional authenticator omitted.
1773 */
1774
1775 /* KerberosWrapper.Ticket */
1776 s2n(enc_ticket->length,p);
1777 memcpy(p, enc_ticket->data, enc_ticket->length);
1778 p+= enc_ticket->length;
1779 n = enc_ticket->length + 2;
1780
1781 /* KerberosWrapper.Authenticator */
1782 if (authp && authp->length)
1783 {
1784 s2n(authp->length,p);
1785 memcpy(p, authp->data, authp->length);
1786 p+= authp->length;
1787 n+= authp->length + 2;
1788
1789 free(authp->data);
1790 authp->data = NULL;
1791 authp->length = 0;
1792 }
1793 else
1794 {
1795 s2n(0,p);/* null authenticator length */
1796 n+=2;
1797 }
1798
1799 tmp_buf[0]=s->client_version>>8;
1800 tmp_buf[1]=s->client_version&0xff;
1801 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1802 goto err;
1803
1804 /* 20010420 VRS. Tried it this way; failed.
1805 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1806 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1807 ** kssl_ctx->length);
1808 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1809 */
1810
1811 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1812 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1813 kssl_ctx->key,iv);
1814 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1815 sizeof tmp_buf);
1816 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1817 outl += padl;
1818 if (outl > sizeof epms)
1819 {
1820 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1821 goto err;
1822 }
1823 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1824
1825 /* KerberosWrapper.EncryptedPreMasterSecret */
1826 s2n(outl,p);
1827 memcpy(p, epms, outl);
1828 p+=outl;
1829 n+=outl + 2;
1830
1831 s->session->master_key_length=
1832 s->method->ssl3_enc->generate_master_secret(s,
1833 s->session->master_key,
1834 tmp_buf, sizeof tmp_buf);
1835
1836 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1837 OPENSSL_cleanse(epms, outl);
1838 }
1839 #endif
1840 #ifndef OPENSSL_NO_DH
1841 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1842 {
1843 DH *dh_srvr,*dh_clnt;
1844
1845 if (s->session->sess_cert->peer_dh_tmp != NULL)
1846 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1847 else
1848 {
1849 /* we get them from the cert */
1850 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1852 goto err;
1853 }
1854
1855 /* generate a new random key */
1856 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1857 {
1858 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1859 goto err;
1860 }
1861 if (!DH_generate_key(dh_clnt))
1862 {
1863 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1864 goto err;
1865 }
1866
1867 /* use the 'p' output buffer for the DH key, but
1868 * make sure to clear it out afterwards */
1869
1870 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1871
1872 if (n <= 0)
1873 {
1874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1875 goto err;
1876 }
1877
1878 /* generate master key from the result */
1879 s->session->master_key_length=
1880 s->method->ssl3_enc->generate_master_secret(s,
1881 s->session->master_key,p,n);
1882 /* clean up */
1883 memset(p,0,n);
1884
1885 /* send off the data */
1886 n=BN_num_bytes(dh_clnt->pub_key);
1887 s2n(n,p);
1888 BN_bn2bin(dh_clnt->pub_key,p);
1889 n+=2;
1890
1891 DH_free(dh_clnt);
1892
1893 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1894 }
1895 #endif
1896
1897 #ifndef OPENSSL_NO_ECDH
1898 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1899 {
1900 const EC_GROUP *srvr_group = NULL;
1901 EC_KEY *tkey;
1902 int ecdh_clnt_cert = 0;
1903 int field_size = 0;
1904
1905 /* Did we send out the client's
1906 * ECDH share for use in premaster
1907 * computation as part of client certificate?
1908 * If so, set ecdh_clnt_cert to 1.
1909 */
1910 if ((l & SSL_kECDH) && (s->cert != NULL))
1911 {
1912 /* XXX: For now, we do not support client
1913 * authentication using ECDH certificates.
1914 * To add such support, one needs to add
1915 * code that checks for appropriate
1916 * conditions and sets ecdh_clnt_cert to 1.
1917 * For example, the cert have an ECC
1918 * key on the same curve as the server's
1919 * and the key should be authorized for
1920 * key agreement.
1921 *
1922 * One also needs to add code in ssl3_connect
1923 * to skip sending the certificate verify
1924 * message.
1925 *
1926 * if ((s->cert->key->privatekey != NULL) &&
1927 * (s->cert->key->privatekey->type ==
1928 * EVP_PKEY_EC) && ...)
1929 * ecdh_clnt_cert = 1;
1930 */
1931 }
1932
1933 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1934 {
1935 tkey = s->session->sess_cert->peer_ecdh_tmp;
1936 }
1937 else
1938 {
1939 /* Get the Server Public Key from Cert */
1940 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1941 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1942 if ((srvr_pub_pkey == NULL) ||
1943 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1944 (srvr_pub_pkey->pkey.ec == NULL))
1945 {
1946 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1947 ERR_R_INTERNAL_ERROR);
1948 goto err;
1949 }
1950
1951 tkey = srvr_pub_pkey->pkey.ec;
1952 }
1953
1954 srvr_group = EC_KEY_get0_group(tkey);
1955 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1956
1957 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1958 {
1959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1960 ERR_R_INTERNAL_ERROR);
1961 goto err;
1962 }
1963
1964 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1965 {
1966 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1967 goto err;
1968 }
1969
1970 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1971 {
1972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1973 goto err;
1974 }
1975 if (ecdh_clnt_cert)
1976 {
1977 /* Reuse key info from our certificate
1978 * We only need our private key to perform
1979 * the ECDH computation.
1980 */
1981 const BIGNUM *priv_key;
1982 tkey = s->cert->key->privatekey->pkey.ec;
1983 priv_key = EC_KEY_get0_private_key(tkey);
1984 if (priv_key == NULL)
1985 {
1986 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1987 goto err;
1988 }
1989 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1990 {
1991 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1992 goto err;
1993 }
1994 }
1995 else
1996 {
1997 /* Generate a new ECDH key pair */
1998 if (!(EC_KEY_generate_key(clnt_ecdh)))
1999 {
2000 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2001 goto err;
2002 }
2003 }
2004
2005 /* use the 'p' output buffer for the ECDH key, but
2006 * make sure to clear it out afterwards
2007 */
2008
2009 field_size = EC_GROUP_get_degree(srvr_group);
2010 if (field_size <= 0)
2011 {
2012 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2013 ERR_R_ECDH_LIB);
2014 goto err;
2015 }
2016 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2017 if (n <= 0)
2018 {
2019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2020 ERR_R_ECDH_LIB);
2021 goto err;
2022 }
2023
2024 /* generate master key from the result */
2025 s->session->master_key_length = s->method->ssl3_enc \
2026 -> generate_master_secret(s,
2027 s->session->master_key,
2028 p, n);
2029
2030 memset(p, 0, n); /* clean up */
2031
2032 if (ecdh_clnt_cert)
2033 {
2034 /* Send empty client key exch message */
2035 n = 0;
2036 }
2037 else
2038 {
2039 /* First check the size of encoding and
2040 * allocate memory accordingly.
2041 */
2042 encoded_pt_len =
2043 EC_POINT_point2oct(srvr_group,
2044 EC_KEY_get0_public_key(clnt_ecdh),
2045 POINT_CONVERSION_UNCOMPRESSED,
2046 NULL, 0, NULL);
2047
2048 encodedPoint = (unsigned char *)
2049 OPENSSL_malloc(encoded_pt_len *
2050 sizeof(unsigned char));
2051 bn_ctx = BN_CTX_new();
2052 if ((encodedPoint == NULL) ||
2053 (bn_ctx == NULL))
2054 {
2055 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2056 goto err;
2057 }
2058
2059 /* Encode the public key */
2060 n = EC_POINT_point2oct(srvr_group,
2061 EC_KEY_get0_public_key(clnt_ecdh),
2062 POINT_CONVERSION_UNCOMPRESSED,
2063 encodedPoint, encoded_pt_len, bn_ctx);
2064
2065 *p = n; /* length of encoded point */
2066 /* Encoded point will be copied here */
2067 p += 1;
2068 /* copy the point */
2069 memcpy((unsigned char *)p, encodedPoint, n);
2070 /* increment n to account for length field */
2071 n += 1;
2072 }
2073
2074 /* Free allocated memory */
2075 BN_CTX_free(bn_ctx);
2076 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2077 if (clnt_ecdh != NULL)
2078 EC_KEY_free(clnt_ecdh);
2079 EVP_PKEY_free(srvr_pub_pkey);
2080 }
2081 #endif /* !OPENSSL_NO_ECDH */
2082 else
2083 {
2084 ssl3_send_alert(s, SSL3_AL_FATAL,
2085 SSL_AD_HANDSHAKE_FAILURE);
2086 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2087 ERR_R_INTERNAL_ERROR);
2088 goto err;
2089 }
2090
2091 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2092 l2n3(n,d);
2093
2094 s->state=SSL3_ST_CW_KEY_EXCH_B;
2095 /* number of bytes to write */
2096 s->init_num=n+4;
2097 s->init_off=0;
2098 }
2099
2100 /* SSL3_ST_CW_KEY_EXCH_B */
2101 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2102 err:
2103 #ifndef OPENSSL_NO_ECDH
2104 BN_CTX_free(bn_ctx);
2105 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2106 if (clnt_ecdh != NULL)
2107 EC_KEY_free(clnt_ecdh);
2108 EVP_PKEY_free(srvr_pub_pkey);
2109 #endif
2110 return(-1);
2111 }
2112
2113 int ssl3_send_client_verify(SSL *s)
2114 {
2115 unsigned char *p,*d;
2116 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2117 EVP_PKEY *pkey;
2118 #ifndef OPENSSL_NO_RSA
2119 unsigned u=0;
2120 #endif
2121 unsigned long n;
2122 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2123 int j;
2124 #endif
2125
2126 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2127 {
2128 d=(unsigned char *)s->init_buf->data;
2129 p= &(d[4]);
2130 pkey=s->cert->key->privatekey;
2131
2132 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2133 &(data[MD5_DIGEST_LENGTH]));
2134
2135 #ifndef OPENSSL_NO_RSA
2136 if (pkey->type == EVP_PKEY_RSA)
2137 {
2138 s->method->ssl3_enc->cert_verify_mac(s,
2139 &(s->s3->finish_dgst1),&(data[0]));
2140 if (RSA_sign(NID_md5_sha1, data,
2141 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2142 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2143 {
2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2145 goto err;
2146 }
2147 s2n(u,p);
2148 n=u+2;
2149 }
2150 else
2151 #endif
2152 #ifndef OPENSSL_NO_DSA
2153 if (pkey->type == EVP_PKEY_DSA)
2154 {
2155 if (!DSA_sign(pkey->save_type,
2156 &(data[MD5_DIGEST_LENGTH]),
2157 SHA_DIGEST_LENGTH,&(p[2]),
2158 (unsigned int *)&j,pkey->pkey.dsa))
2159 {
2160 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2161 goto err;
2162 }
2163 s2n(j,p);
2164 n=j+2;
2165 }
2166 else
2167 #endif
2168 #ifndef OPENSSL_NO_ECDSA
2169 if (pkey->type == EVP_PKEY_EC)
2170 {
2171 if (!ECDSA_sign(pkey->save_type,
2172 &(data[MD5_DIGEST_LENGTH]),
2173 SHA_DIGEST_LENGTH,&(p[2]),
2174 (unsigned int *)&j,pkey->pkey.ec))
2175 {
2176 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2177 ERR_R_ECDSA_LIB);
2178 goto err;
2179 }
2180 s2n(j,p);
2181 n=j+2;
2182 }
2183 else
2184 #endif
2185 {
2186 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2187 goto err;
2188 }
2189 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2190 l2n3(n,d);
2191
2192 s->state=SSL3_ST_CW_CERT_VRFY_B;
2193 s->init_num=(int)n+4;
2194 s->init_off=0;
2195 }
2196 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2197 err:
2198 return(-1);
2199 }
2200
2201 int ssl3_send_client_certificate(SSL *s)
2202 {
2203 X509 *x509=NULL;
2204 EVP_PKEY *pkey=NULL;
2205 int i;
2206 unsigned long l;
2207
2208 if (s->state == SSL3_ST_CW_CERT_A)
2209 {
2210 if ((s->cert == NULL) ||
2211 (s->cert->key->x509 == NULL) ||
2212 (s->cert->key->privatekey == NULL))
2213 s->state=SSL3_ST_CW_CERT_B;
2214 else
2215 s->state=SSL3_ST_CW_CERT_C;
2216 }
2217
2218 /* We need to get a client cert */
2219 if (s->state == SSL3_ST_CW_CERT_B)
2220 {
2221 /* If we get an error, we need to
2222 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2223 * We then get retied later */
2224 i=0;
2225 if (s->ctx->client_cert_cb != NULL)
2226 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2227 if (i < 0)
2228 {
2229 s->rwstate=SSL_X509_LOOKUP;
2230 return(-1);
2231 }
2232 s->rwstate=SSL_NOTHING;
2233 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2234 {
2235 s->state=SSL3_ST_CW_CERT_B;
2236 if ( !SSL_use_certificate(s,x509) ||
2237 !SSL_use_PrivateKey(s,pkey))
2238 i=0;
2239 }
2240 else if (i == 1)
2241 {
2242 i=0;
2243 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2244 }
2245
2246 if (x509 != NULL) X509_free(x509);
2247 if (pkey != NULL) EVP_PKEY_free(pkey);
2248 if (i == 0)
2249 {
2250 if (s->version == SSL3_VERSION)
2251 {
2252 s->s3->tmp.cert_req=0;
2253 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2254 return(1);
2255 }
2256 else
2257 {
2258 s->s3->tmp.cert_req=2;
2259 }
2260 }
2261
2262 /* Ok, we have a cert */
2263 s->state=SSL3_ST_CW_CERT_C;
2264 }
2265
2266 if (s->state == SSL3_ST_CW_CERT_C)
2267 {
2268 s->state=SSL3_ST_CW_CERT_D;
2269 l=ssl3_output_cert_chain(s,
2270 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2271 s->init_num=(int)l;
2272 s->init_off=0;
2273 }
2274 /* SSL3_ST_CW_CERT_D */
2275 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2276 }
2277
2278 #define has_bits(i,m) (((i)&(m)) == (m))
2279
2280 int ssl3_check_cert_and_algorithm(SSL *s)
2281 {
2282 int i,idx;
2283 long algs;
2284 EVP_PKEY *pkey=NULL;
2285 SESS_CERT *sc;
2286 #ifndef OPENSSL_NO_RSA
2287 RSA *rsa;
2288 #endif
2289 #ifndef OPENSSL_NO_DH
2290 DH *dh;
2291 #endif
2292
2293 sc=s->session->sess_cert;
2294
2295 if (sc == NULL)
2296 {
2297 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2298 goto err;
2299 }
2300
2301 algs=s->s3->tmp.new_cipher->algorithms;
2302
2303 /* we don't have a certificate */
2304 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2305 return(1);
2306
2307 #ifndef OPENSSL_NO_RSA
2308 rsa=s->session->sess_cert->peer_rsa_tmp;
2309 #endif
2310 #ifndef OPENSSL_NO_DH
2311 dh=s->session->sess_cert->peer_dh_tmp;
2312 #endif
2313
2314 /* This is the passed certificate */
2315
2316 idx=sc->peer_cert_type;
2317 #ifndef OPENSSL_NO_ECDH
2318 if (idx == SSL_PKEY_ECC)
2319 {
2320 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2321 s->s3->tmp.new_cipher) == 0)
2322 { /* check failed */
2323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2324 goto f_err;
2325 }
2326 else
2327 {
2328 return 1;
2329 }
2330 }
2331 #endif
2332 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2333 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2334 EVP_PKEY_free(pkey);
2335
2336
2337 /* Check that we have a certificate if we require one */
2338 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2339 {
2340 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2341 goto f_err;
2342 }
2343 #ifndef OPENSSL_NO_DSA
2344 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2345 {
2346 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2347 goto f_err;
2348 }
2349 #endif
2350 #ifndef OPENSSL_NO_RSA
2351 if ((algs & SSL_kRSA) &&
2352 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2353 {
2354 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2355 goto f_err;
2356 }
2357 #endif
2358 #ifndef OPENSSL_NO_DH
2359 if ((algs & SSL_kEDH) &&
2360 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2361 {
2362 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2363 goto f_err;
2364 }
2365 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2366 {
2367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2368 goto f_err;
2369 }
2370 #ifndef OPENSSL_NO_DSA
2371 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2372 {
2373 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2374 goto f_err;
2375 }
2376 #endif
2377 #endif
2378
2379 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2380 {
2381 #ifndef OPENSSL_NO_RSA
2382 if (algs & SSL_kRSA)
2383 {
2384 if (rsa == NULL
2385 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2386 {
2387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2388 goto f_err;
2389 }
2390 }
2391 else
2392 #endif
2393 #ifndef OPENSSL_NO_DH
2394 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2395 {
2396 if (dh == NULL
2397 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2398 {
2399 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2400 goto f_err;
2401 }
2402 }
2403 else
2404 #endif
2405 {
2406 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2407 goto f_err;
2408 }
2409 }
2410 return(1);
2411 f_err:
2412 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2413 err:
2414 return(0);
2415 }
2416
2417
2418 #ifndef OPENSSL_NO_ECDH
2419 /* This is the complement of nid2curve_id in s3_srvr.c. */
2420 static int curve_id2nid(int curve_id)
2421 {
2422 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2423 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2424 static int nid_list[26] =
2425 {
2426 0,
2427 NID_sect163k1, /* sect163k1 (1) */
2428 NID_sect163r1, /* sect163r1 (2) */
2429 NID_sect163r2, /* sect163r2 (3) */
2430 NID_sect193r1, /* sect193r1 (4) */
2431 NID_sect193r2, /* sect193r2 (5) */
2432 NID_sect233k1, /* sect233k1 (6) */
2433 NID_sect233r1, /* sect233r1 (7) */
2434 NID_sect239k1, /* sect239k1 (8) */
2435 NID_sect283k1, /* sect283k1 (9) */
2436 NID_sect283r1, /* sect283r1 (10) */
2437 NID_sect409k1, /* sect409k1 (11) */
2438 NID_sect409r1, /* sect409r1 (12) */
2439 NID_sect571k1, /* sect571k1 (13) */
2440 NID_sect571r1, /* sect571r1 (14) */
2441 NID_secp160k1, /* secp160k1 (15) */
2442 NID_secp160r1, /* secp160r1 (16) */
2443 NID_secp160r2, /* secp160r2 (17) */
2444 NID_secp192k1, /* secp192k1 (18) */
2445 NID_X9_62_prime192v1, /* secp192r1 (19) */
2446 NID_secp224k1, /* secp224k1 (20) */
2447 NID_secp224r1, /* secp224r1 (21) */
2448 NID_secp256k1, /* secp256k1 (22) */
2449 NID_X9_62_prime256v1, /* secp256r1 (23) */
2450 NID_secp384r1, /* secp384r1 (24) */
2451 NID_secp521r1 /* secp521r1 (25) */
2452 };
2453
2454 if ((curve_id < 1) || (curve_id > 25)) return 0;
2455
2456 return nid_list[curve_id];
2457 }
2458 #endif
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