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
ssl3_get_client_method(int ver)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
IMPLEMENT_ssl3_meth_func(SSLv3_client_method,ssl_undefined_function,ssl3_connect,ssl3_get_client_method)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=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
ssl3_client_hello(SSL * s)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=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
ssl3_get_server_hello(SSL * s)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
ssl3_get_server_certificate(SSL * s)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 <= 0)
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
ssl3_get_key_exchange(SSL * s)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 two bytes.
1215 */
1216 param_len=2;
1217 if ((param_len > n) ||
1218 (*p != NAMED_CURVE_TYPE) ||
1219 ((curve_nid = curve_id2nid(*(p + 1))) == 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+=2;
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) <= 0)
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) <= 0)
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
ssl3_get_certificate_request(SSL * s)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
ca_dn_cmp(const X509_NAME * const * a,const X509_NAME * const * b)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
ssl3_get_server_done(SSL * s)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 #ifndef OPENSSL_NO_ECDH
1618 static const int KDF1_SHA1_len = 20;
KDF1_SHA1(const void * in,size_t inlen,void * out,size_t * outlen)1619 static void *KDF1_SHA1(const void *in, size_t inlen, void *out, size_t *outlen)
1620 {
1621 #ifndef OPENSSL_NO_SHA
1622 if (*outlen < SHA_DIGEST_LENGTH)
1623 return NULL;
1624 else
1625 *outlen = SHA_DIGEST_LENGTH;
1626 return SHA1(in, inlen, out);
1627 #else
1628 return NULL;
1629 #endif /* OPENSSL_NO_SHA */
1630 }
1631 #endif /* OPENSSL_NO_ECDH */
1632
ssl3_send_client_key_exchange(SSL * s)1633 int ssl3_send_client_key_exchange(SSL *s)
1634 {
1635 unsigned char *p,*d;
1636 int n;
1637 unsigned long l;
1638 #ifndef OPENSSL_NO_RSA
1639 unsigned char *q;
1640 EVP_PKEY *pkey=NULL;
1641 #endif
1642 #ifndef OPENSSL_NO_KRB5
1643 KSSL_ERR kssl_err;
1644 #endif /* OPENSSL_NO_KRB5 */
1645 #ifndef OPENSSL_NO_ECDH
1646 EC_KEY *clnt_ecdh = NULL;
1647 const EC_POINT *srvr_ecpoint = NULL;
1648 EVP_PKEY *srvr_pub_pkey = NULL;
1649 unsigned char *encodedPoint = NULL;
1650 int encoded_pt_len = 0;
1651 BN_CTX * bn_ctx = NULL;
1652 #endif
1653
1654 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1655 {
1656 d=(unsigned char *)s->init_buf->data;
1657 p= &(d[4]);
1658
1659 l=s->s3->tmp.new_cipher->algorithms;
1660
1661 /* Fool emacs indentation */
1662 if (0) {}
1663 #ifndef OPENSSL_NO_RSA
1664 else if (l & SSL_kRSA)
1665 {
1666 RSA *rsa;
1667 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1668
1669 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1670 rsa=s->session->sess_cert->peer_rsa_tmp;
1671 else
1672 {
1673 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1674 if ((pkey == NULL) ||
1675 (pkey->type != EVP_PKEY_RSA) ||
1676 (pkey->pkey.rsa == NULL))
1677 {
1678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1679 goto err;
1680 }
1681 rsa=pkey->pkey.rsa;
1682 EVP_PKEY_free(pkey);
1683 }
1684
1685 tmp_buf[0]=s->client_version>>8;
1686 tmp_buf[1]=s->client_version&0xff;
1687 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1688 goto err;
1689
1690 s->session->master_key_length=sizeof tmp_buf;
1691
1692 q=p;
1693 /* Fix buf for TLS and beyond */
1694 if (s->version > SSL3_VERSION)
1695 p+=2;
1696 n=RSA_public_encrypt(sizeof tmp_buf,
1697 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1698 #ifdef PKCS1_CHECK
1699 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1700 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1701 #endif
1702 if (n <= 0)
1703 {
1704 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1705 goto err;
1706 }
1707
1708 /* Fix buf for TLS and beyond */
1709 if (s->version > SSL3_VERSION)
1710 {
1711 s2n(n,q);
1712 n+=2;
1713 }
1714
1715 s->session->master_key_length=
1716 s->method->ssl3_enc->generate_master_secret(s,
1717 s->session->master_key,
1718 tmp_buf,sizeof tmp_buf);
1719 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1720 }
1721 #endif
1722 #ifndef OPENSSL_NO_KRB5
1723 else if (l & SSL_kKRB5)
1724 {
1725 krb5_error_code krb5rc;
1726 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1727 /* krb5_data krb5_ap_req; */
1728 krb5_data *enc_ticket;
1729 krb5_data authenticator, *authp = NULL;
1730 EVP_CIPHER_CTX ciph_ctx;
1731 EVP_CIPHER *enc = NULL;
1732 unsigned char iv[EVP_MAX_IV_LENGTH];
1733 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1734 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1735 + EVP_MAX_IV_LENGTH];
1736 int padl, outl = sizeof(epms);
1737
1738 EVP_CIPHER_CTX_init(&ciph_ctx);
1739
1740 #ifdef KSSL_DEBUG
1741 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1742 l, SSL_kKRB5);
1743 #endif /* KSSL_DEBUG */
1744
1745 authp = NULL;
1746 #ifdef KRB5SENDAUTH
1747 if (KRB5SENDAUTH) authp = &authenticator;
1748 #endif /* KRB5SENDAUTH */
1749
1750 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1751 &kssl_err);
1752 enc = kssl_map_enc(kssl_ctx->enctype);
1753 if (enc == NULL)
1754 goto err;
1755 #ifdef KSSL_DEBUG
1756 {
1757 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1758 if (krb5rc && kssl_err.text)
1759 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1760 }
1761 #endif /* KSSL_DEBUG */
1762
1763 if (krb5rc)
1764 {
1765 ssl3_send_alert(s,SSL3_AL_FATAL,
1766 SSL_AD_HANDSHAKE_FAILURE);
1767 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1768 kssl_err.reason);
1769 goto err;
1770 }
1771
1772 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1773 ** in place of RFC 2712 KerberosWrapper, as in:
1774 **
1775 ** Send ticket (copy to *p, set n = length)
1776 ** n = krb5_ap_req.length;
1777 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1778 ** if (krb5_ap_req.data)
1779 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1780 **
1781 ** Now using real RFC 2712 KerberosWrapper
1782 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1783 ** Note: 2712 "opaque" types are here replaced
1784 ** with a 2-byte length followed by the value.
1785 ** Example:
1786 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1787 ** Where "xx xx" = length bytes. Shown here with
1788 ** optional authenticator omitted.
1789 */
1790
1791 /* KerberosWrapper.Ticket */
1792 s2n(enc_ticket->length,p);
1793 memcpy(p, enc_ticket->data, enc_ticket->length);
1794 p+= enc_ticket->length;
1795 n = enc_ticket->length + 2;
1796
1797 /* KerberosWrapper.Authenticator */
1798 if (authp && authp->length)
1799 {
1800 s2n(authp->length,p);
1801 memcpy(p, authp->data, authp->length);
1802 p+= authp->length;
1803 n+= authp->length + 2;
1804
1805 free(authp->data);
1806 authp->data = NULL;
1807 authp->length = 0;
1808 }
1809 else
1810 {
1811 s2n(0,p);/* null authenticator length */
1812 n+=2;
1813 }
1814
1815 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1816 goto err;
1817
1818 /* 20010420 VRS. Tried it this way; failed.
1819 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1820 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1821 ** kssl_ctx->length);
1822 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1823 */
1824
1825 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1826 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1827 kssl_ctx->key,iv);
1828 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1829 sizeof tmp_buf);
1830 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1831 outl += padl;
1832 if (outl > sizeof epms)
1833 {
1834 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1835 goto err;
1836 }
1837 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1838
1839 /* KerberosWrapper.EncryptedPreMasterSecret */
1840 s2n(outl,p);
1841 memcpy(p, epms, outl);
1842 p+=outl;
1843 n+=outl + 2;
1844
1845 s->session->master_key_length=
1846 s->method->ssl3_enc->generate_master_secret(s,
1847 s->session->master_key,
1848 tmp_buf, sizeof tmp_buf);
1849
1850 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1851 OPENSSL_cleanse(epms, outl);
1852 }
1853 #endif
1854 #ifndef OPENSSL_NO_DH
1855 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1856 {
1857 DH *dh_srvr,*dh_clnt;
1858
1859 if (s->session->sess_cert->peer_dh_tmp != NULL)
1860 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1861 else
1862 {
1863 /* we get them from the cert */
1864 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1865 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1866 goto err;
1867 }
1868
1869 /* generate a new random key */
1870 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1871 {
1872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1873 goto err;
1874 }
1875 if (!DH_generate_key(dh_clnt))
1876 {
1877 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1878 goto err;
1879 }
1880
1881 /* use the 'p' output buffer for the DH key, but
1882 * make sure to clear it out afterwards */
1883
1884 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1885
1886 if (n <= 0)
1887 {
1888 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1889 goto err;
1890 }
1891
1892 /* generate master key from the result */
1893 s->session->master_key_length=
1894 s->method->ssl3_enc->generate_master_secret(s,
1895 s->session->master_key,p,n);
1896 /* clean up */
1897 memset(p,0,n);
1898
1899 /* send off the data */
1900 n=BN_num_bytes(dh_clnt->pub_key);
1901 s2n(n,p);
1902 BN_bn2bin(dh_clnt->pub_key,p);
1903 n+=2;
1904
1905 DH_free(dh_clnt);
1906
1907 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1908 }
1909 #endif
1910
1911 #ifndef OPENSSL_NO_ECDH
1912 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1913 {
1914 const EC_GROUP *srvr_group = NULL;
1915 EC_KEY *tkey;
1916 int ecdh_clnt_cert = 0;
1917 int field_size = 0;
1918
1919 /* Did we send out the client's
1920 * ECDH share for use in premaster
1921 * computation as part of client certificate?
1922 * If so, set ecdh_clnt_cert to 1.
1923 */
1924 if ((l & SSL_kECDH) && (s->cert != NULL))
1925 {
1926 /* XXX: For now, we do not support client
1927 * authentication using ECDH certificates.
1928 * To add such support, one needs to add
1929 * code that checks for appropriate
1930 * conditions and sets ecdh_clnt_cert to 1.
1931 * For example, the cert have an ECC
1932 * key on the same curve as the server's
1933 * and the key should be authorized for
1934 * key agreement.
1935 *
1936 * One also needs to add code in ssl3_connect
1937 * to skip sending the certificate verify
1938 * message.
1939 *
1940 * if ((s->cert->key->privatekey != NULL) &&
1941 * (s->cert->key->privatekey->type ==
1942 * EVP_PKEY_EC) && ...)
1943 * ecdh_clnt_cert = 1;
1944 */
1945 }
1946
1947 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1948 {
1949 tkey = s->session->sess_cert->peer_ecdh_tmp;
1950 }
1951 else
1952 {
1953 /* Get the Server Public Key from Cert */
1954 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1955 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1956 if ((srvr_pub_pkey == NULL) ||
1957 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1958 (srvr_pub_pkey->pkey.ec == NULL))
1959 {
1960 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1961 ERR_R_INTERNAL_ERROR);
1962 goto err;
1963 }
1964
1965 tkey = srvr_pub_pkey->pkey.ec;
1966 }
1967
1968 srvr_group = EC_KEY_get0_group(tkey);
1969 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1970
1971 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1972 {
1973 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1974 ERR_R_INTERNAL_ERROR);
1975 goto err;
1976 }
1977
1978 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1979 {
1980 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1981 goto err;
1982 }
1983
1984 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1985 {
1986 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1987 goto err;
1988 }
1989 if (ecdh_clnt_cert)
1990 {
1991 /* Reuse key info from our certificate
1992 * We only need our private key to perform
1993 * the ECDH computation.
1994 */
1995 const BIGNUM *priv_key;
1996 tkey = s->cert->key->privatekey->pkey.ec;
1997 priv_key = EC_KEY_get0_private_key(tkey);
1998 if (priv_key == NULL)
1999 {
2000 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2001 goto err;
2002 }
2003 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2004 {
2005 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2006 goto err;
2007 }
2008 }
2009 else
2010 {
2011 /* Generate a new ECDH key pair */
2012 if (!(EC_KEY_generate_key(clnt_ecdh)))
2013 {
2014 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2015 goto err;
2016 }
2017 }
2018
2019 /* use the 'p' output buffer for the ECDH key, but
2020 * make sure to clear it out afterwards
2021 */
2022
2023 field_size = EC_GROUP_get_degree(srvr_group);
2024 if (field_size <= 0)
2025 {
2026 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2027 ERR_R_ECDH_LIB);
2028 goto err;
2029 }
2030 /* If field size is not more than 24 octets, then use SHA-1 hash of result;
2031 * otherwise, use result (see section 4.8 of draft-ietf-tls-ecc-03.txt;
2032 * this is new with this version of the Internet Draft).
2033 */
2034 if (field_size <= 24 * 8)
2035 n=ECDH_compute_key(p, KDF1_SHA1_len, srvr_ecpoint, clnt_ecdh, KDF1_SHA1);
2036 else
2037 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2038 if (n <= 0)
2039 {
2040 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2041 ERR_R_ECDH_LIB);
2042 goto err;
2043 }
2044
2045 /* generate master key from the result */
2046 s->session->master_key_length = s->method->ssl3_enc \
2047 -> generate_master_secret(s,
2048 s->session->master_key,
2049 p, n);
2050
2051 memset(p, 0, n); /* clean up */
2052
2053 if (ecdh_clnt_cert)
2054 {
2055 /* Send empty client key exch message */
2056 n = 0;
2057 }
2058 else
2059 {
2060 /* First check the size of encoding and
2061 * allocate memory accordingly.
2062 */
2063 encoded_pt_len =
2064 EC_POINT_point2oct(srvr_group,
2065 EC_KEY_get0_public_key(clnt_ecdh),
2066 POINT_CONVERSION_UNCOMPRESSED,
2067 NULL, 0, NULL);
2068
2069 encodedPoint = (unsigned char *)
2070 OPENSSL_malloc(encoded_pt_len *
2071 sizeof(unsigned char));
2072 bn_ctx = BN_CTX_new();
2073 if ((encodedPoint == NULL) ||
2074 (bn_ctx == NULL))
2075 {
2076 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2077 goto err;
2078 }
2079
2080 /* Encode the public key */
2081 n = EC_POINT_point2oct(srvr_group,
2082 EC_KEY_get0_public_key(clnt_ecdh),
2083 POINT_CONVERSION_UNCOMPRESSED,
2084 encodedPoint, encoded_pt_len, bn_ctx);
2085
2086 *p = n; /* length of encoded point */
2087 /* Encoded point will be copied here */
2088 p += 1;
2089 /* copy the point */
2090 memcpy((unsigned char *)p, encodedPoint, n);
2091 /* increment n to account for length field */
2092 n += 1;
2093 }
2094
2095 /* Free allocated memory */
2096 BN_CTX_free(bn_ctx);
2097 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2098 if (clnt_ecdh != NULL)
2099 EC_KEY_free(clnt_ecdh);
2100 EVP_PKEY_free(srvr_pub_pkey);
2101 }
2102 #endif /* !OPENSSL_NO_ECDH */
2103 else
2104 {
2105 ssl3_send_alert(s, SSL3_AL_FATAL,
2106 SSL_AD_HANDSHAKE_FAILURE);
2107 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2108 ERR_R_INTERNAL_ERROR);
2109 goto err;
2110 }
2111
2112 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2113 l2n3(n,d);
2114
2115 s->state=SSL3_ST_CW_KEY_EXCH_B;
2116 /* number of bytes to write */
2117 s->init_num=n+4;
2118 s->init_off=0;
2119 }
2120
2121 /* SSL3_ST_CW_KEY_EXCH_B */
2122 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2123 err:
2124 #ifndef OPENSSL_NO_ECDH
2125 BN_CTX_free(bn_ctx);
2126 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2127 if (clnt_ecdh != NULL)
2128 EC_KEY_free(clnt_ecdh);
2129 EVP_PKEY_free(srvr_pub_pkey);
2130 #endif
2131 return(-1);
2132 }
2133
ssl3_send_client_verify(SSL * s)2134 int ssl3_send_client_verify(SSL *s)
2135 {
2136 unsigned char *p,*d;
2137 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2138 EVP_PKEY *pkey;
2139 #ifndef OPENSSL_NO_RSA
2140 unsigned u=0;
2141 #endif
2142 unsigned long n;
2143 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2144 int j;
2145 #endif
2146
2147 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2148 {
2149 d=(unsigned char *)s->init_buf->data;
2150 p= &(d[4]);
2151 pkey=s->cert->key->privatekey;
2152
2153 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2154 &(data[MD5_DIGEST_LENGTH]));
2155
2156 #ifndef OPENSSL_NO_RSA
2157 if (pkey->type == EVP_PKEY_RSA)
2158 {
2159 s->method->ssl3_enc->cert_verify_mac(s,
2160 &(s->s3->finish_dgst1),&(data[0]));
2161 if (RSA_sign(NID_md5_sha1, data,
2162 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2163 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2164 {
2165 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2166 goto err;
2167 }
2168 s2n(u,p);
2169 n=u+2;
2170 }
2171 else
2172 #endif
2173 #ifndef OPENSSL_NO_DSA
2174 if (pkey->type == EVP_PKEY_DSA)
2175 {
2176 if (!DSA_sign(pkey->save_type,
2177 &(data[MD5_DIGEST_LENGTH]),
2178 SHA_DIGEST_LENGTH,&(p[2]),
2179 (unsigned int *)&j,pkey->pkey.dsa))
2180 {
2181 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2182 goto err;
2183 }
2184 s2n(j,p);
2185 n=j+2;
2186 }
2187 else
2188 #endif
2189 #ifndef OPENSSL_NO_ECDSA
2190 if (pkey->type == EVP_PKEY_EC)
2191 {
2192 if (!ECDSA_sign(pkey->save_type,
2193 &(data[MD5_DIGEST_LENGTH]),
2194 SHA_DIGEST_LENGTH,&(p[2]),
2195 (unsigned int *)&j,pkey->pkey.ec))
2196 {
2197 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2198 ERR_R_ECDSA_LIB);
2199 goto err;
2200 }
2201 s2n(j,p);
2202 n=j+2;
2203 }
2204 else
2205 #endif
2206 {
2207 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2208 goto err;
2209 }
2210 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2211 l2n3(n,d);
2212
2213 s->state=SSL3_ST_CW_CERT_VRFY_B;
2214 s->init_num=(int)n+4;
2215 s->init_off=0;
2216 }
2217 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2218 err:
2219 return(-1);
2220 }
2221
ssl3_send_client_certificate(SSL * s)2222 int ssl3_send_client_certificate(SSL *s)
2223 {
2224 X509 *x509=NULL;
2225 EVP_PKEY *pkey=NULL;
2226 int i;
2227 unsigned long l;
2228
2229 if (s->state == SSL3_ST_CW_CERT_A)
2230 {
2231 if ((s->cert == NULL) ||
2232 (s->cert->key->x509 == NULL) ||
2233 (s->cert->key->privatekey == NULL))
2234 s->state=SSL3_ST_CW_CERT_B;
2235 else
2236 s->state=SSL3_ST_CW_CERT_C;
2237 }
2238
2239 /* We need to get a client cert */
2240 if (s->state == SSL3_ST_CW_CERT_B)
2241 {
2242 /* If we get an error, we need to
2243 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2244 * We then get retied later */
2245 i=0;
2246 if (s->ctx->client_cert_cb != NULL)
2247 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2248 if (i < 0)
2249 {
2250 s->rwstate=SSL_X509_LOOKUP;
2251 return(-1);
2252 }
2253 s->rwstate=SSL_NOTHING;
2254 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2255 {
2256 s->state=SSL3_ST_CW_CERT_B;
2257 if ( !SSL_use_certificate(s,x509) ||
2258 !SSL_use_PrivateKey(s,pkey))
2259 i=0;
2260 }
2261 else if (i == 1)
2262 {
2263 i=0;
2264 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2265 }
2266
2267 if (x509 != NULL) X509_free(x509);
2268 if (pkey != NULL) EVP_PKEY_free(pkey);
2269 if (i == 0)
2270 {
2271 if (s->version == SSL3_VERSION)
2272 {
2273 s->s3->tmp.cert_req=0;
2274 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2275 return(1);
2276 }
2277 else
2278 {
2279 s->s3->tmp.cert_req=2;
2280 }
2281 }
2282
2283 /* Ok, we have a cert */
2284 s->state=SSL3_ST_CW_CERT_C;
2285 }
2286
2287 if (s->state == SSL3_ST_CW_CERT_C)
2288 {
2289 s->state=SSL3_ST_CW_CERT_D;
2290 l=ssl3_output_cert_chain(s,
2291 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2292 s->init_num=(int)l;
2293 s->init_off=0;
2294 }
2295 /* SSL3_ST_CW_CERT_D */
2296 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2297 }
2298
2299 #define has_bits(i,m) (((i)&(m)) == (m))
2300
ssl3_check_cert_and_algorithm(SSL * s)2301 int ssl3_check_cert_and_algorithm(SSL *s)
2302 {
2303 int i,idx;
2304 long algs;
2305 EVP_PKEY *pkey=NULL;
2306 SESS_CERT *sc;
2307 #ifndef OPENSSL_NO_RSA
2308 RSA *rsa;
2309 #endif
2310 #ifndef OPENSSL_NO_DH
2311 DH *dh;
2312 #endif
2313
2314 sc=s->session->sess_cert;
2315
2316 if (sc == NULL)
2317 {
2318 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2319 goto err;
2320 }
2321
2322 algs=s->s3->tmp.new_cipher->algorithms;
2323
2324 /* we don't have a certificate */
2325 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2326 return(1);
2327
2328 #ifndef OPENSSL_NO_RSA
2329 rsa=s->session->sess_cert->peer_rsa_tmp;
2330 #endif
2331 #ifndef OPENSSL_NO_DH
2332 dh=s->session->sess_cert->peer_dh_tmp;
2333 #endif
2334
2335 /* This is the passed certificate */
2336
2337 idx=sc->peer_cert_type;
2338 #ifndef OPENSSL_NO_ECDH
2339 if (idx == SSL_PKEY_ECC)
2340 {
2341 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2342 s->s3->tmp.new_cipher) == 0)
2343 { /* check failed */
2344 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2345 goto f_err;
2346 }
2347 else
2348 {
2349 return 1;
2350 }
2351 }
2352 #endif
2353 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2354 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2355 EVP_PKEY_free(pkey);
2356
2357
2358 /* Check that we have a certificate if we require one */
2359 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2360 {
2361 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2362 goto f_err;
2363 }
2364 #ifndef OPENSSL_NO_DSA
2365 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2366 {
2367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2368 goto f_err;
2369 }
2370 #endif
2371 #ifndef OPENSSL_NO_RSA
2372 if ((algs & SSL_kRSA) &&
2373 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2374 {
2375 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2376 goto f_err;
2377 }
2378 #endif
2379 #ifndef OPENSSL_NO_DH
2380 if ((algs & SSL_kEDH) &&
2381 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2382 {
2383 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2384 goto f_err;
2385 }
2386 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2387 {
2388 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2389 goto f_err;
2390 }
2391 #ifndef OPENSSL_NO_DSA
2392 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2393 {
2394 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2395 goto f_err;
2396 }
2397 #endif
2398 #endif
2399
2400 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2401 {
2402 #ifndef OPENSSL_NO_RSA
2403 if (algs & SSL_kRSA)
2404 {
2405 if (rsa == NULL
2406 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2407 {
2408 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2409 goto f_err;
2410 }
2411 }
2412 else
2413 #endif
2414 #ifndef OPENSSL_NO_DH
2415 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2416 {
2417 if (dh == NULL
2418 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2419 {
2420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2421 goto f_err;
2422 }
2423 }
2424 else
2425 #endif
2426 {
2427 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2428 goto f_err;
2429 }
2430 }
2431 return(1);
2432 f_err:
2433 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2434 err:
2435 return(0);
2436 }
2437
2438
2439 #ifndef OPENSSL_NO_ECDH
2440 /* This is the complement of nid2curve_id in s3_srvr.c. */
curve_id2nid(int curve_id)2441 static int curve_id2nid(int curve_id)
2442 {
2443 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2444 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2445 static int nid_list[26] =
2446 {
2447 0,
2448 NID_sect163k1, /* sect163k1 (1) */
2449 NID_sect163r1, /* sect163r1 (2) */
2450 NID_sect163r2, /* sect163r2 (3) */
2451 NID_sect193r1, /* sect193r1 (4) */
2452 NID_sect193r2, /* sect193r2 (5) */
2453 NID_sect233k1, /* sect233k1 (6) */
2454 NID_sect233r1, /* sect233r1 (7) */
2455 NID_sect239k1, /* sect239k1 (8) */
2456 NID_sect283k1, /* sect283k1 (9) */
2457 NID_sect283r1, /* sect283r1 (10) */
2458 NID_sect409k1, /* sect409k1 (11) */
2459 NID_sect409r1, /* sect409r1 (12) */
2460 NID_sect571k1, /* sect571k1 (13) */
2461 NID_sect571r1, /* sect571r1 (14) */
2462 NID_secp160k1, /* secp160k1 (15) */
2463 NID_secp160r1, /* secp160r1 (16) */
2464 NID_secp160r2, /* secp160r2 (17) */
2465 NID_secp192k1, /* secp192k1 (18) */
2466 NID_X9_62_prime192v1, /* secp192r1 (19) */
2467 NID_secp224k1, /* secp224k1 (20) */
2468 NID_secp224r1, /* secp224r1 (21) */
2469 NID_secp256k1, /* secp256k1 (22) */
2470 NID_X9_62_prime256v1, /* secp256r1 (23) */
2471 NID_secp384r1, /* secp384r1 (24) */
2472 NID_secp521r1 /* secp521r1 (25) */
2473 };
2474
2475 if ((curve_id < 1) || (curve_id > 25)) return 0;
2476
2477 return nid_list[curve_id];
2478 }
2479 #endif
2480