2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
125 #define REUSE_CIPHER_BUG
126 #define NETSCAPE_HANG_BUG
129 #include "ssl_locl.h"
130 #include "kssl_lcl.h"
131 #include <openssl/buffer.h>
132 #include <openssl/rand.h>
133 #include <openssl/objects.h>
134 #include <openssl/evp.h>
135 #include <openssl/x509.h>
136 #include <openssl/dh.h>
137 #ifndef OPENSSL_NO_KRB5
138 #include <openssl/krb5_asn.h>
140 #include <openssl/md5.h>
142 static SSL_METHOD *ssl3_get_server_method(int ver);
143 static int ssl3_get_client_hello(SSL *s);
144 static int ssl3_check_client_hello(SSL *s);
145 static int ssl3_send_server_hello(SSL *s);
146 static int ssl3_send_server_key_exchange(SSL *s);
147 static int ssl3_send_certificate_request(SSL *s);
148 static int ssl3_send_server_done(SSL *s);
149 static int ssl3_get_client_key_exchange(SSL *s);
150 static int ssl3_get_client_certificate(SSL *s);
151 static int ssl3_get_cert_verify(SSL *s);
152 static int ssl3_send_hello_request(SSL *s);
154 #ifndef OPENSSL_NO_ECDH
155 static int nid2curve_id(int nid);
158 static SSL_METHOD *ssl3_get_server_method(int ver)
160 if (ver == SSL3_VERSION)
161 return(SSLv3_server_method());
166 SSL_METHOD *SSLv3_server_method(void)
169 static SSL_METHOD SSLv3_server_data;
173 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
177 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
179 SSLv3_server_data.ssl_accept=ssl3_accept;
180 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
184 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
186 return(&SSLv3_server_data);
189 int ssl3_accept(SSL *s)
192 unsigned long l,Time=time(NULL);
193 void (*cb)(const SSL *ssl,int type,int val)=NULL;
196 int new_state,state,skip=0;
198 RAND_add(&Time,sizeof(Time),0);
202 if (s->info_callback != NULL)
204 else if (s->ctx->info_callback != NULL)
205 cb=s->ctx->info_callback;
207 /* init things to blank */
209 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
213 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
223 case SSL_ST_RENEGOTIATE:
225 /* s->state=SSL_ST_ACCEPT; */
229 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
230 case SSL_ST_OK|SSL_ST_ACCEPT:
233 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
235 if ((s->version>>8) != 3)
237 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
240 s->type=SSL_ST_ACCEPT;
242 if (s->init_buf == NULL)
244 if ((buf=BUF_MEM_new()) == NULL)
249 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
257 if (!ssl3_setup_buffers(s))
265 if (s->state != SSL_ST_RENEGOTIATE)
267 /* Ok, we now need to push on a buffering BIO so that
268 * the output is sent in a way that TCP likes :-)
270 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
272 ssl3_init_finished_mac(s);
273 s->state=SSL3_ST_SR_CLNT_HELLO_A;
274 s->ctx->stats.sess_accept++;
278 /* s->state == SSL_ST_RENEGOTIATE,
279 * we will just send a HelloRequest */
280 s->ctx->stats.sess_accept_renegotiate++;
281 s->state=SSL3_ST_SW_HELLO_REQ_A;
285 case SSL3_ST_SW_HELLO_REQ_A:
286 case SSL3_ST_SW_HELLO_REQ_B:
289 ret=ssl3_send_hello_request(s);
290 if (ret <= 0) goto end;
291 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
292 s->state=SSL3_ST_SW_FLUSH;
295 ssl3_init_finished_mac(s);
298 case SSL3_ST_SW_HELLO_REQ_C:
302 case SSL3_ST_SR_CLNT_HELLO_A:
303 case SSL3_ST_SR_CLNT_HELLO_B:
304 case SSL3_ST_SR_CLNT_HELLO_C:
307 ret=ssl3_get_client_hello(s);
308 if (ret <= 0) goto end;
310 s->state=SSL3_ST_SW_SRVR_HELLO_A;
314 case SSL3_ST_SW_SRVR_HELLO_A:
315 case SSL3_ST_SW_SRVR_HELLO_B:
316 ret=ssl3_send_server_hello(s);
317 if (ret <= 0) goto end;
320 s->state=SSL3_ST_SW_CHANGE_A;
322 s->state=SSL3_ST_SW_CERT_A;
326 case SSL3_ST_SW_CERT_A:
327 case SSL3_ST_SW_CERT_B:
328 /* Check if it is anon DH or anon ECDH */
329 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
331 ret=ssl3_send_server_certificate(s);
332 if (ret <= 0) goto end;
336 s->state=SSL3_ST_SW_KEY_EXCH_A;
340 case SSL3_ST_SW_KEY_EXCH_A:
341 case SSL3_ST_SW_KEY_EXCH_B:
342 l=s->s3->tmp.new_cipher->algorithms;
344 /* clear this, it may get reset by
345 * send_server_key_exchange */
346 if ((s->options & SSL_OP_EPHEMERAL_RSA)
347 #ifndef OPENSSL_NO_KRB5
349 #endif /* OPENSSL_NO_KRB5 */
351 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
352 * even when forbidden by protocol specs
353 * (handshake may fail as clients are not required to
354 * be able to handle this) */
355 s->s3->tmp.use_rsa_tmp=1;
357 s->s3->tmp.use_rsa_tmp=0;
360 /* only send if a DH key exchange, fortezza or
361 * RSA but we have a sign only certificate
363 * For ECC ciphersuites, we send a serverKeyExchange
364 * message only if the cipher suite is either
365 * ECDH-anon or ECDHE. In other cases, the
366 * server certificate contains the server's
367 * public key for key exchange.
369 if (s->s3->tmp.use_rsa_tmp
371 || (l & (SSL_DH|SSL_kFZA))
373 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
374 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
375 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
381 ret=ssl3_send_server_key_exchange(s);
382 if (ret <= 0) goto end;
387 s->state=SSL3_ST_SW_CERT_REQ_A;
391 case SSL3_ST_SW_CERT_REQ_A:
392 case SSL3_ST_SW_CERT_REQ_B:
393 if (/* don't request cert unless asked for it: */
394 !(s->verify_mode & SSL_VERIFY_PEER) ||
395 /* if SSL_VERIFY_CLIENT_ONCE is set,
396 * don't request cert during re-negotiation: */
397 ((s->session->peer != NULL) &&
398 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
399 /* never request cert in anonymous ciphersuites
400 * (see section "Certificate request" in SSL 3 drafts
401 * and in RFC 2246): */
402 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
403 /* ... except when the application insists on verification
404 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
405 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
406 /* never request cert in Kerberos ciphersuites */
407 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
409 /* no cert request */
411 s->s3->tmp.cert_request=0;
412 s->state=SSL3_ST_SW_SRVR_DONE_A;
416 s->s3->tmp.cert_request=1;
417 ret=ssl3_send_certificate_request(s);
418 if (ret <= 0) goto end;
419 #ifndef NETSCAPE_HANG_BUG
420 s->state=SSL3_ST_SW_SRVR_DONE_A;
422 s->state=SSL3_ST_SW_FLUSH;
423 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
429 case SSL3_ST_SW_SRVR_DONE_A:
430 case SSL3_ST_SW_SRVR_DONE_B:
431 ret=ssl3_send_server_done(s);
432 if (ret <= 0) goto end;
433 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
434 s->state=SSL3_ST_SW_FLUSH;
438 case SSL3_ST_SW_FLUSH:
439 /* number of bytes to be flushed */
440 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
443 s->rwstate=SSL_WRITING;
444 num1=BIO_flush(s->wbio);
445 if (num1 <= 0) { ret= -1; goto end; }
446 s->rwstate=SSL_NOTHING;
449 s->state=s->s3->tmp.next_state;
452 case SSL3_ST_SR_CERT_A:
453 case SSL3_ST_SR_CERT_B:
454 /* Check for second client hello (MS SGC) */
455 ret = ssl3_check_client_hello(s);
459 s->state = SSL3_ST_SR_CLNT_HELLO_C;
461 if (s->s3->tmp.cert_request)
463 ret=ssl3_get_client_certificate(s);
464 if (ret <= 0) goto end;
467 s->state=SSL3_ST_SR_KEY_EXCH_A;
471 case SSL3_ST_SR_KEY_EXCH_A:
472 case SSL3_ST_SR_KEY_EXCH_B:
473 ret=ssl3_get_client_key_exchange(s);
478 /* For the ECDH ciphersuites when
479 * the client sends its ECDH pub key in
480 * a certificate, the CertificateVerify
481 * message is not sent.
483 s->state=SSL3_ST_SR_FINISHED_A;
488 s->state=SSL3_ST_SR_CERT_VRFY_A;
491 /* We need to get hashes here so if there is
492 * a client cert, it can be verified
494 s->method->ssl3_enc->cert_verify_mac(s,
495 &(s->s3->finish_dgst1),
496 &(s->s3->tmp.cert_verify_md[0]));
497 s->method->ssl3_enc->cert_verify_mac(s,
498 &(s->s3->finish_dgst2),
499 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
503 case SSL3_ST_SR_CERT_VRFY_A:
504 case SSL3_ST_SR_CERT_VRFY_B:
506 /* we should decide if we expected this one */
507 ret=ssl3_get_cert_verify(s);
508 if (ret <= 0) goto end;
510 s->state=SSL3_ST_SR_FINISHED_A;
514 case SSL3_ST_SR_FINISHED_A:
515 case SSL3_ST_SR_FINISHED_B:
516 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
517 SSL3_ST_SR_FINISHED_B);
518 if (ret <= 0) goto end;
522 s->state=SSL3_ST_SW_CHANGE_A;
526 case SSL3_ST_SW_CHANGE_A:
527 case SSL3_ST_SW_CHANGE_B:
529 s->session->cipher=s->s3->tmp.new_cipher;
530 if (!s->method->ssl3_enc->setup_key_block(s))
531 { ret= -1; goto end; }
533 ret=ssl3_send_change_cipher_spec(s,
534 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
536 if (ret <= 0) goto end;
537 s->state=SSL3_ST_SW_FINISHED_A;
540 if (!s->method->ssl3_enc->change_cipher_state(s,
541 SSL3_CHANGE_CIPHER_SERVER_WRITE))
549 case SSL3_ST_SW_FINISHED_A:
550 case SSL3_ST_SW_FINISHED_B:
551 ret=ssl3_send_finished(s,
552 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
553 s->method->ssl3_enc->server_finished_label,
554 s->method->ssl3_enc->server_finished_label_len);
555 if (ret <= 0) goto end;
556 s->state=SSL3_ST_SW_FLUSH;
558 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
560 s->s3->tmp.next_state=SSL_ST_OK;
565 /* clean a few things up */
566 ssl3_cleanup_key_block(s);
568 BUF_MEM_free(s->init_buf);
571 /* remove buffering on output */
572 ssl_free_wbio_buffer(s);
576 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
578 /* actually not necessarily a 'new' session unless
579 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
583 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
585 s->ctx->stats.sess_accept_good++;
587 s->handshake_func=ssl3_accept;
589 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
597 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
603 if (!s->s3->tmp.reuse_message && !skip)
607 if ((ret=BIO_flush(s->wbio)) <= 0)
612 if ((cb != NULL) && (s->state != state))
616 cb(s,SSL_CB_ACCEPT_LOOP,1);
623 /* BIO_flush(s->wbio); */
627 cb(s,SSL_CB_ACCEPT_EXIT,ret);
631 static int ssl3_send_hello_request(SSL *s)
635 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
637 p=(unsigned char *)s->init_buf->data;
638 *(p++)=SSL3_MT_HELLO_REQUEST;
643 s->state=SSL3_ST_SW_HELLO_REQ_B;
644 /* number of bytes to write */
649 /* SSL3_ST_SW_HELLO_REQ_B */
650 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
653 static int ssl3_check_client_hello(SSL *s)
658 /* this function is called when we really expect a Certificate message,
659 * so permit appropriate message length */
660 n=ssl3_get_message(s,
666 if (!ok) return((int)n);
667 s->s3->tmp.reuse_message = 1;
668 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
670 /* Throw away what we have done so far in the current handshake,
671 * which will now be aborted. (A full SSL_clear would be too much.)
672 * I hope that tmp.dh is the only thing that may need to be cleared
673 * when a handshake is not completed ... */
674 #ifndef OPENSSL_NO_DH
675 if (s->s3->tmp.dh != NULL)
677 DH_free(s->s3->tmp.dh);
678 s->s3->tmp.dh = NULL;
686 static int ssl3_get_client_hello(SSL *s)
688 int i,j,ok,al,ret= -1;
691 unsigned char *p,*d,*q;
694 STACK_OF(SSL_CIPHER) *ciphers=NULL;
696 /* We do this so that we will respond with our native type.
697 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
698 * This down switching should be handled by a different method.
699 * If we are SSLv3, we will respond with SSLv3, even if prompted with
702 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
705 s->state=SSL3_ST_SR_CLNT_HELLO_B;
707 n=ssl3_get_message(s,
708 SSL3_ST_SR_CLNT_HELLO_B,
709 SSL3_ST_SR_CLNT_HELLO_C,
710 SSL3_MT_CLIENT_HELLO,
711 SSL3_RT_MAX_PLAIN_LENGTH,
714 if (!ok) return((int)n);
715 d=p=(unsigned char *)s->init_msg;
717 /* use version from inside client hello, not from record header
718 * (may differ: see RFC 2246, Appendix E, second paragraph) */
719 s->client_version=(((int)p[0])<<8)|(int)p[1];
722 if (s->client_version < s->version)
724 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
725 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
727 /* similar to ssl3_get_record, send alert using remote version number */
728 s->version = s->client_version;
730 al = SSL_AD_PROTOCOL_VERSION;
734 /* load the client random */
735 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
738 /* get the session-id */
742 /* Versions before 0.9.7 always allow session reuse during renegotiation
743 * (i.e. when s->new_session is true), option
744 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
745 * Maybe this optional behaviour should always have been the default,
746 * but we cannot safely change the default behaviour (or new applications
747 * might be written that become totally unsecure when compiled with
748 * an earlier library version)
750 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
752 if (!ssl_get_new_session(s,1))
757 i=ssl_get_prev_session(s,p,j);
759 { /* previous session */
766 if (!ssl_get_new_session(s,1))
773 if ((i == 0) && (j != 0))
775 /* we need a cipher if we are not resuming a session */
776 al=SSL_AD_ILLEGAL_PARAMETER;
777 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
782 /* not enough data */
783 al=SSL_AD_DECODE_ERROR;
784 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
787 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
794 /* If it is a hit, check that the cipher is in the list */
795 if ((s->hit) && (i > 0))
798 id=s->session->cipher->id;
801 printf("client sent %d ciphers\n",sk_num(ciphers));
803 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
805 c=sk_SSL_CIPHER_value(ciphers,i);
807 printf("client [%2d of %2d]:%s\n",
808 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
818 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
820 /* Very bad for multi-threading.... */
821 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
826 /* we need to have the cipher in the cipher
827 * list if we are asked to reuse it */
828 al=SSL_AD_ILLEGAL_PARAMETER;
829 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
839 /* not enough data */
840 al=SSL_AD_DECODE_ERROR;
841 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
847 if (p[j] == 0) break;
854 al=SSL_AD_DECODE_ERROR;
855 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
859 /* Worst case, we will use the NULL compression, but if we have other
860 * options, we will now look for them. We have i-1 compression
861 * algorithms from the client, starting at q. */
862 s->s3->tmp.new_compression=NULL;
863 if (s->ctx->comp_methods != NULL)
864 { /* See if we have a match */
867 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
870 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
883 s->s3->tmp.new_compression=comp;
888 /* TLS does not mind if there is extra stuff */
889 #if 0 /* SSL 3.0 does not mind either, so we should disable this test
890 * (was enabled in 0.9.6d through 0.9.6j and 0.9.7 through 0.9.7b,
891 * in earlier SSLeay/OpenSSL releases this test existed but was buggy) */
892 if (s->version == SSL3_VERSION)
896 /* wrong number of bytes,
897 * there could be more to follow */
898 al=SSL_AD_DECODE_ERROR;
899 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
905 /* Given s->session->ciphers and SSL_get_ciphers, we must
910 s->session->compress_meth=(comp == NULL)?0:comp->id;
911 if (s->session->ciphers != NULL)
912 sk_SSL_CIPHER_free(s->session->ciphers);
913 s->session->ciphers=ciphers;
916 al=SSL_AD_ILLEGAL_PARAMETER;
917 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
921 c=ssl3_choose_cipher(s,s->session->ciphers,
926 al=SSL_AD_HANDSHAKE_FAILURE;
927 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
930 s->s3->tmp.new_cipher=c;
934 /* Session-id reuse */
935 #ifdef REUSE_CIPHER_BUG
936 STACK_OF(SSL_CIPHER) *sk;
940 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
942 sk=s->session->ciphers;
943 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
945 c=sk_SSL_CIPHER_value(sk,i);
946 if (c->algorithms & SSL_eNULL)
948 if (SSL_C_IS_EXPORT(c))
952 s->s3->tmp.new_cipher=nc;
954 s->s3->tmp.new_cipher=ec;
956 s->s3->tmp.new_cipher=s->session->cipher;
960 s->s3->tmp.new_cipher=s->session->cipher;
963 /* we now have the following setup.
965 * cipher_list - our prefered list of ciphers
966 * ciphers - the clients prefered list of ciphers
967 * compression - basically ignored right now
968 * ssl version is set - sslv3
969 * s->session - The ssl session has been setup.
970 * s->hit - session reuse flag
971 * s->tmp.new_cipher - the new cipher to use.
978 ssl3_send_alert(s,SSL3_AL_FATAL,al);
981 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
985 static int ssl3_send_server_hello(SSL *s)
990 unsigned long l,Time;
992 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
994 buf=(unsigned char *)s->init_buf->data;
995 p=s->s3->server_random;
996 Time=time(NULL); /* Time */
998 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
999 /* Do the message type and length last */
1002 *(p++)=s->version>>8;
1003 *(p++)=s->version&0xff;
1006 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1007 p+=SSL3_RANDOM_SIZE;
1009 /* now in theory we have 3 options to sending back the
1010 * session id. If it is a re-use, we send back the
1011 * old session-id, if it is a new session, we send
1012 * back the new session-id or we send back a 0 length
1013 * session-id if we want it to be single use.
1014 * Currently I will not implement the '0' length session-id
1015 * 12-Jan-98 - I'll now support the '0' length stuff.
1017 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
1018 s->session->session_id_length=0;
1020 sl=s->session->session_id_length;
1021 if (sl > (int)sizeof(s->session->session_id))
1023 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1027 memcpy(p,s->session->session_id,sl);
1030 /* put the cipher */
1031 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1034 /* put the compression method */
1035 if (s->s3->tmp.new_compression == NULL)
1038 *(p++)=s->s3->tmp.new_compression->id;
1043 *(d++)=SSL3_MT_SERVER_HELLO;
1046 s->state=SSL3_ST_CW_CLNT_HELLO_B;
1047 /* number of bytes to write */
1052 /* SSL3_ST_CW_CLNT_HELLO_B */
1053 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1056 static int ssl3_send_server_done(SSL *s)
1060 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1062 p=(unsigned char *)s->init_buf->data;
1065 *(p++)=SSL3_MT_SERVER_DONE;
1070 s->state=SSL3_ST_SW_SRVR_DONE_B;
1071 /* number of bytes to write */
1076 /* SSL3_ST_CW_CLNT_HELLO_B */
1077 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1080 static int ssl3_send_server_key_exchange(SSL *s)
1082 #ifndef OPENSSL_NO_RSA
1086 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1089 #ifndef OPENSSL_NO_DH
1092 #ifndef OPENSSL_NO_ECDH
1093 EC_KEY *ecdh=NULL, *ecdhp;
1094 unsigned char *encodedPoint = NULL;
1097 BN_CTX *bn_ctx = NULL;
1100 unsigned char *p,*d;
1110 EVP_MD_CTX_init(&md_ctx);
1111 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1113 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1118 r[0]=r[1]=r[2]=r[3]=NULL;
1120 #ifndef OPENSSL_NO_RSA
1121 if (type & SSL_kRSA)
1124 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1126 rsa=s->cert->rsa_tmp_cb(s,
1127 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1128 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1131 al=SSL_AD_HANDSHAKE_FAILURE;
1132 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1140 al=SSL_AD_HANDSHAKE_FAILURE;
1141 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1146 s->s3->tmp.use_rsa_tmp=1;
1150 #ifndef OPENSSL_NO_DH
1151 if (type & SSL_kEDH)
1154 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1155 dhp=s->cert->dh_tmp_cb(s,
1156 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1157 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1160 al=SSL_AD_HANDSHAKE_FAILURE;
1161 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1165 if (s->s3->tmp.dh != NULL)
1168 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1172 if ((dh=DHparams_dup(dhp)) == NULL)
1174 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1179 if ((dhp->pub_key == NULL ||
1180 dhp->priv_key == NULL ||
1181 (s->options & SSL_OP_SINGLE_DH_USE)))
1183 if(!DH_generate_key(dh))
1185 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1192 dh->pub_key=BN_dup(dhp->pub_key);
1193 dh->priv_key=BN_dup(dhp->priv_key);
1194 if ((dh->pub_key == NULL) ||
1195 (dh->priv_key == NULL))
1197 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1207 #ifndef OPENSSL_NO_ECDH
1208 if (type & SSL_kECDHE)
1210 ecdhp=cert->ecdh_tmp;
1211 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1213 ecdhp=s->cert->ecdh_tmp_cb(s,
1214 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1215 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1219 al=SSL_AD_HANDSHAKE_FAILURE;
1220 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1224 if (s->s3->tmp.ecdh != NULL)
1226 EC_KEY_free(s->s3->tmp.ecdh);
1227 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1231 /* Duplicate the ECDH structure. */
1234 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1237 if (!EC_KEY_up_ref(ecdhp))
1239 SSLerr(SSL_F_SSL3_CTRL,ERR_R_ECDH_LIB);
1244 s->s3->tmp.ecdh=ecdh;
1245 if ((ecdh->pub_key == NULL) ||
1246 (ecdh->priv_key == NULL) ||
1247 (s->options & SSL_OP_SINGLE_ECDH_USE))
1249 if(!EC_KEY_generate_key(ecdh))
1251 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1256 if ((ecdh->group == NULL) ||
1257 (ecdh->pub_key == NULL) ||
1258 (ecdh->priv_key == NULL))
1260 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1264 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1265 (EC_GROUP_get_degree(ecdh->group) > 163))
1267 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1271 /* XXX: For now, we only support ephemeral ECDH
1272 * keys over named (not generic) curves. For
1273 * supported named curves, curve_id is non-zero.
1276 nid2curve_id(EC_GROUP_get_nid(ecdh->group)))
1279 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1283 /* Encode the public key.
1284 * First check the size of encoding and
1285 * allocate memory accordingly.
1287 encodedlen = EC_POINT_point2oct(ecdh->group,
1289 POINT_CONVERSION_UNCOMPRESSED,
1292 encodedPoint = (unsigned char *)
1293 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1294 bn_ctx = BN_CTX_new();
1295 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1297 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1302 encodedlen = EC_POINT_point2oct(ecdh->group,
1304 POINT_CONVERSION_UNCOMPRESSED,
1305 encodedPoint, encodedlen, bn_ctx);
1307 if (encodedlen == 0)
1309 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1313 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1315 /* XXX: For now, we only support named (not
1316 * generic) curves in ECDH ephemeral key exchanges.
1317 * In this situation, we need three additional bytes
1318 * to encode the entire ServerECDHParams
1323 /* We'll generate the serverKeyExchange message
1324 * explicitly so we can set these to NULLs
1331 #endif /* !OPENSSL_NO_ECDH */
1333 al=SSL_AD_HANDSHAKE_FAILURE;
1334 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1337 for (i=0; r[i] != NULL; i++)
1339 nr[i]=BN_num_bytes(r[i]);
1343 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1345 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1348 al=SSL_AD_DECODE_ERROR;
1351 kn=EVP_PKEY_size(pkey);
1359 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1361 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1364 d=(unsigned char *)s->init_buf->data;
1367 for (i=0; r[i] != NULL; i++)
1374 #ifndef OPENSSL_NO_ECDH
1375 if (type & SSL_kECDHE)
1377 /* XXX: For now, we only support named (not generic) curves.
1378 * In this situation, the serverKeyExchange message has:
1379 * [1 byte CurveType], [1 byte CurveName]
1380 * [1 byte length of encoded point], followed by
1381 * the actual encoded point itself
1383 *p = NAMED_CURVE_TYPE;
1389 memcpy((unsigned char*)p,
1390 (unsigned char *)encodedPoint,
1392 OPENSSL_free(encodedPoint);
1400 /* n is the length of the params, they start at &(d[4])
1401 * and p points to the space at the end. */
1402 #ifndef OPENSSL_NO_RSA
1403 if (pkey->type == EVP_PKEY_RSA)
1407 for (num=2; num > 0; num--)
1409 EVP_DigestInit_ex(&md_ctx,(num == 2)
1410 ?s->ctx->md5:s->ctx->sha1, NULL);
1411 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1412 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1413 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1414 EVP_DigestFinal_ex(&md_ctx,q,
1415 (unsigned int *)&i);
1419 if (RSA_sign(NID_md5_sha1, md_buf, j,
1420 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1422 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1430 #if !defined(OPENSSL_NO_DSA)
1431 if (pkey->type == EVP_PKEY_DSA)
1434 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1435 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1436 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1437 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1438 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1439 (unsigned int *)&i,pkey))
1441 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1449 #if !defined(OPENSSL_NO_ECDSA)
1450 if (pkey->type == EVP_PKEY_EC)
1452 /* let's do ECDSA */
1453 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1454 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1455 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1456 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1457 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1458 (unsigned int *)&i,pkey))
1460 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1469 /* Is this error check actually needed? */
1470 al=SSL_AD_HANDSHAKE_FAILURE;
1471 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1476 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1479 /* we should now have things packed up, so lets send
1485 s->state = SSL3_ST_SW_KEY_EXCH_B;
1486 EVP_MD_CTX_cleanup(&md_ctx);
1487 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1489 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1491 #ifndef OPENSSL_NO_ECDH
1492 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1493 BN_CTX_free(bn_ctx);
1495 EVP_MD_CTX_cleanup(&md_ctx);
1499 static int ssl3_send_certificate_request(SSL *s)
1501 unsigned char *p,*d;
1503 STACK_OF(X509_NAME) *sk=NULL;
1507 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1511 d=p=(unsigned char *)&(buf->data[4]);
1513 /* get the list of acceptable cert types */
1515 n=ssl3_get_req_cert_type(s,p);
1524 sk=SSL_get_client_CA_list(s);
1528 for (i=0; i<sk_X509_NAME_num(sk); i++)
1530 name=sk_X509_NAME_value(sk,i);
1531 j=i2d_X509_NAME(name,NULL);
1532 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1534 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1537 p=(unsigned char *)&(buf->data[4+n]);
1538 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1541 i2d_X509_NAME(name,&p);
1548 i2d_X509_NAME(name,&p);
1549 j-=2; s2n(j,d); j+=2;
1555 /* else no CA names */
1556 p=(unsigned char *)&(buf->data[4+off]);
1559 d=(unsigned char *)buf->data;
1560 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1563 /* we should now have things packed up, so lets send
1568 #ifdef NETSCAPE_HANG_BUG
1569 p=(unsigned char *)s->init_buf->data + s->init_num;
1572 *(p++)=SSL3_MT_SERVER_DONE;
1579 s->state = SSL3_ST_SW_CERT_REQ_B;
1582 /* SSL3_ST_SW_CERT_REQ_B */
1583 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1589 static const int KDF1_SHA1_len = 20;
1590 static void *KDF1_SHA1(void *in, size_t inlen, void *out, size_t outlen)
1592 #ifndef OPENSSL_NO_SHA
1593 if (outlen != SHA_DIGEST_LENGTH)
1595 return SHA1(in, inlen, out);
1601 static int ssl3_get_client_key_exchange(SSL *s)
1607 #ifndef OPENSSL_NO_RSA
1609 EVP_PKEY *pkey=NULL;
1611 #ifndef OPENSSL_NO_DH
1615 #ifndef OPENSSL_NO_KRB5
1617 #endif /* OPENSSL_NO_KRB5 */
1619 #ifndef OPENSSL_NO_ECDH
1620 EC_KEY *srvr_ecdh = NULL;
1621 EVP_PKEY *clnt_pub_pkey = NULL;
1622 EC_POINT *clnt_ecpoint = NULL;
1623 BN_CTX *bn_ctx = NULL;
1626 n=ssl3_get_message(s,
1627 SSL3_ST_SR_KEY_EXCH_A,
1628 SSL3_ST_SR_KEY_EXCH_B,
1629 SSL3_MT_CLIENT_KEY_EXCHANGE,
1633 if (!ok) return((int)n);
1634 p=(unsigned char *)s->init_msg;
1636 l=s->s3->tmp.new_cipher->algorithms;
1638 #ifndef OPENSSL_NO_RSA
1641 /* FIX THIS UP EAY EAY EAY EAY */
1642 if (s->s3->tmp.use_rsa_tmp)
1644 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1645 rsa=s->cert->rsa_tmp;
1646 /* Don't do a callback because rsa_tmp should
1647 * be sent already */
1650 al=SSL_AD_HANDSHAKE_FAILURE;
1651 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1658 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1659 if ( (pkey == NULL) ||
1660 (pkey->type != EVP_PKEY_RSA) ||
1661 (pkey->pkey.rsa == NULL))
1663 al=SSL_AD_HANDSHAKE_FAILURE;
1664 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1671 if (s->version > SSL3_VERSION)
1676 if (!(s->options & SSL_OP_TLS_D5_BUG))
1678 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1688 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1692 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1694 al=SSL_AD_DECODE_ERROR;
1695 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1698 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1700 /* The premaster secret must contain the same version number as the
1701 * ClientHello to detect version rollback attacks (strangely, the
1702 * protocol does not offer such protection for DH ciphersuites).
1703 * However, buggy clients exist that send the negotiated protocol
1704 * version instead if the server does not support the requested
1706 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1707 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1708 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1710 al=SSL_AD_DECODE_ERROR;
1711 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1713 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1714 * (http://eprint.iacr.org/2003/052/) exploits the version
1715 * number check as a "bad version oracle" -- an alert would
1716 * reveal that the plaintext corresponding to some ciphertext
1717 * made up by the adversary is properly formatted except
1718 * that the version number is wrong. To avoid such attacks,
1719 * we should treat this just like any other decryption error. */
1725 /* Some decryption failure -- use random value instead as countermeasure
1726 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1727 * (see RFC 2246, section 7.4.7.1). */
1729 i = SSL_MAX_MASTER_KEY_LENGTH;
1730 p[0] = s->client_version >> 8;
1731 p[1] = s->client_version & 0xff;
1732 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1735 s->session->master_key_length=
1736 s->method->ssl3_enc->generate_master_secret(s,
1737 s->session->master_key,
1739 OPENSSL_cleanse(p,i);
1743 #ifndef OPENSSL_NO_DH
1744 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1749 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1751 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1761 if (n == 0L) /* the parameters are in the cert */
1763 al=SSL_AD_HANDSHAKE_FAILURE;
1764 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1769 if (s->s3->tmp.dh == NULL)
1771 al=SSL_AD_HANDSHAKE_FAILURE;
1772 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1776 dh_srvr=s->s3->tmp.dh;
1779 pub=BN_bin2bn(p,i,NULL);
1782 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1786 i=DH_compute_key(p,pub,dh_srvr);
1790 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1794 DH_free(s->s3->tmp.dh);
1799 s->session->master_key_length=
1800 s->method->ssl3_enc->generate_master_secret(s,
1801 s->session->master_key,p,i);
1802 OPENSSL_cleanse(p,i);
1806 #ifndef OPENSSL_NO_KRB5
1809 krb5_error_code krb5rc;
1810 krb5_data enc_ticket;
1811 krb5_data authenticator;
1813 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1814 EVP_CIPHER_CTX ciph_ctx;
1815 EVP_CIPHER *enc = NULL;
1816 unsigned char iv[EVP_MAX_IV_LENGTH];
1817 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1818 + EVP_MAX_BLOCK_LENGTH];
1820 krb5_timestamp authtime = 0;
1821 krb5_ticket_times ttimes;
1823 EVP_CIPHER_CTX_init(&ciph_ctx);
1825 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1828 enc_ticket.length = i;
1829 enc_ticket.data = (char *)p;
1830 p+=enc_ticket.length;
1833 authenticator.length = i;
1834 authenticator.data = (char *)p;
1835 p+=authenticator.length;
1839 enc_pms.data = (char *)p;
1842 /* Note that the length is checked again below,
1845 if(enc_pms.length > sizeof pms)
1847 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1848 SSL_R_DATA_LENGTH_TOO_LONG);
1852 if (n != enc_ticket.length + authenticator.length +
1855 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1856 SSL_R_DATA_LENGTH_TOO_LONG);
1860 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1864 printf("kssl_sget_tkt rtn %d [%d]\n",
1865 krb5rc, kssl_err.reason);
1867 printf("kssl_err text= %s\n", kssl_err.text);
1868 #endif /* KSSL_DEBUG */
1869 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1874 /* Note: no authenticator is not considered an error,
1875 ** but will return authtime == 0.
1877 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1878 &authtime, &kssl_err)) != 0)
1881 printf("kssl_check_authent rtn %d [%d]\n",
1882 krb5rc, kssl_err.reason);
1884 printf("kssl_err text= %s\n", kssl_err.text);
1885 #endif /* KSSL_DEBUG */
1886 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1891 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1893 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
1898 kssl_ctx_show(kssl_ctx);
1899 #endif /* KSSL_DEBUG */
1901 enc = kssl_map_enc(kssl_ctx->enctype);
1905 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1907 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
1909 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1910 SSL_R_DECRYPTION_FAILED);
1913 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1914 (unsigned char *)enc_pms.data, enc_pms.length))
1916 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1917 SSL_R_DECRYPTION_FAILED);
1920 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1922 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1923 SSL_R_DATA_LENGTH_TOO_LONG);
1926 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
1928 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1929 SSL_R_DECRYPTION_FAILED);
1933 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1935 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1936 SSL_R_DATA_LENGTH_TOO_LONG);
1939 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1941 s->session->master_key_length=
1942 s->method->ssl3_enc->generate_master_secret(s,
1943 s->session->master_key, pms, outl);
1945 if (kssl_ctx->client_princ)
1947 int len = strlen(kssl_ctx->client_princ);
1948 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
1950 s->session->krb5_client_princ_len = len;
1951 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
1956 /* Was doing kssl_ctx_free() here,
1957 ** but it caused problems for apache.
1958 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1959 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1963 #endif /* OPENSSL_NO_KRB5 */
1965 #ifndef OPENSSL_NO_ECDH
1966 if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1971 /* initialize structures for server's ECDH key pair */
1972 if ((srvr_ecdh = EC_KEY_new()) == NULL)
1974 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1975 ERR_R_MALLOC_FAILURE);
1979 /* Let's get server private key and group information */
1982 /* use the certificate */
1983 srvr_ecdh->group = s->cert->key->privatekey-> \
1985 srvr_ecdh->priv_key = s->cert->key->privatekey-> \
1986 pkey.eckey->priv_key;
1990 /* use the ephermeral values we saved when
1991 * generating the ServerKeyExchange msg.
1993 srvr_ecdh->group = s->s3->tmp.ecdh->group;
1994 srvr_ecdh->priv_key = s->s3->tmp.ecdh->priv_key;
1997 /* Let's get client's public key */
1998 if ((clnt_ecpoint = EC_POINT_new(srvr_ecdh->group))
2001 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2002 ERR_R_MALLOC_FAILURE);
2008 /* Client Publickey was in Client Certificate */
2012 al=SSL_AD_HANDSHAKE_FAILURE;
2013 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2016 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2018 (clnt_pub_pkey->type != EVP_PKEY_EC))
2020 /* XXX: For now, we do not support client
2021 * authentication using ECDH certificates
2022 * so this branch (n == 0L) of the code is
2023 * never executed. When that support is
2024 * added, we ought to ensure the key
2025 * received in the certificate is
2026 * authorized for key agreement.
2027 * ECDH_compute_key implicitly checks that
2028 * the two ECDH shares are for the same
2031 al=SSL_AD_HANDSHAKE_FAILURE;
2032 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2033 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2037 EC_POINT_copy(clnt_ecpoint,
2038 clnt_pub_pkey->pkey.eckey->pub_key);
2039 ret = 2; /* Skip certificate verify processing */
2043 /* Get client's public key from encoded point
2044 * in the ClientKeyExchange message.
2046 if ((bn_ctx = BN_CTX_new()) == NULL)
2048 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2049 ERR_R_MALLOC_FAILURE);
2053 /* Get encoded point length */
2056 if (EC_POINT_oct2point(srvr_ecdh->group,
2057 clnt_ecpoint, p, i, bn_ctx) == 0)
2059 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2063 /* p is pointing to somewhere in the buffer
2064 * currently, so set it to the start
2066 p=(unsigned char *)s->init_buf->data;
2069 /* Compute the shared pre-master secret */
2070 field_size = EC_GROUP_get_degree(srvr_ecdh->group);
2071 if (field_size <= 0)
2073 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2077 /* If field size is not more than 24 octets, then use SHA-1 hash of result;
2078 * otherwise, use result (see section 4.8 of draft-ietf-tls-ecc-03.txt;
2079 * this is new with this version of the Internet Draft).
2081 if (field_size <= 24 * 8)
2082 i = ECDH_compute_key(p, KDF1_SHA1_len, clnt_ecpoint, srvr_ecdh, KDF1_SHA1);
2084 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2087 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2092 EVP_PKEY_free(clnt_pub_pkey);
2093 EC_POINT_free(clnt_ecpoint);
2094 if (srvr_ecdh != NULL)
2096 srvr_ecdh->priv_key = NULL;
2097 srvr_ecdh->group = NULL;
2098 EC_KEY_free(srvr_ecdh);
2100 BN_CTX_free(bn_ctx);
2102 /* Compute the master secret */
2103 s->session->master_key_length = s->method->ssl3_enc-> \
2104 generate_master_secret(s, s->session->master_key, p, i);
2106 OPENSSL_cleanse(p, i);
2112 al=SSL_AD_HANDSHAKE_FAILURE;
2113 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2114 SSL_R_UNKNOWN_CIPHER_TYPE);
2120 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2121 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2124 #ifndef OPENSSL_NO_ECDH
2125 EVP_PKEY_free(clnt_pub_pkey);
2126 EC_POINT_free(clnt_ecpoint);
2127 if (srvr_ecdh != NULL)
2129 srvr_ecdh->priv_key = NULL;
2130 srvr_ecdh->group = NULL;
2131 EC_KEY_free(srvr_ecdh);
2133 BN_CTX_free(bn_ctx);
2138 static int ssl3_get_cert_verify(SSL *s)
2140 EVP_PKEY *pkey=NULL;
2147 n=ssl3_get_message(s,
2148 SSL3_ST_SR_CERT_VRFY_A,
2149 SSL3_ST_SR_CERT_VRFY_B,
2154 if (!ok) return((int)n);
2156 if (s->session->peer != NULL)
2158 peer=s->session->peer;
2159 pkey=X509_get_pubkey(peer);
2160 type=X509_certificate_type(peer,pkey);
2168 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2170 s->s3->tmp.reuse_message=1;
2171 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2173 al=SSL_AD_UNEXPECTED_MESSAGE;
2174 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2183 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2184 al=SSL_AD_UNEXPECTED_MESSAGE;
2188 if (!(type & EVP_PKT_SIGN))
2190 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2191 al=SSL_AD_ILLEGAL_PARAMETER;
2195 if (s->s3->change_cipher_spec)
2197 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2198 al=SSL_AD_UNEXPECTED_MESSAGE;
2202 /* we now have a signature that we need to verify */
2203 p=(unsigned char *)s->init_msg;
2208 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2209 al=SSL_AD_DECODE_ERROR;
2213 j=EVP_PKEY_size(pkey);
2214 if ((i > j) || (n > j) || (n <= 0))
2216 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2217 al=SSL_AD_DECODE_ERROR;
2221 #ifndef OPENSSL_NO_RSA
2222 if (pkey->type == EVP_PKEY_RSA)
2224 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2225 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2229 al=SSL_AD_DECRYPT_ERROR;
2230 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2235 al=SSL_AD_DECRYPT_ERROR;
2236 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2242 #ifndef OPENSSL_NO_DSA
2243 if (pkey->type == EVP_PKEY_DSA)
2245 j=DSA_verify(pkey->save_type,
2246 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2247 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2251 al=SSL_AD_DECRYPT_ERROR;
2252 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2258 #ifndef OPENSSL_NO_ECDSA
2259 if (pkey->type == EVP_PKEY_EC)
2261 j=ECDSA_verify(pkey->save_type,
2262 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2263 SHA_DIGEST_LENGTH,p,i,pkey->pkey.eckey);
2267 al=SSL_AD_DECRYPT_ERROR;
2268 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2269 SSL_R_BAD_ECDSA_SIGNATURE);
2276 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2277 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2286 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2289 EVP_PKEY_free(pkey);
2293 static int ssl3_get_client_certificate(SSL *s)
2295 int i,ok,al,ret= -1;
2297 unsigned long l,nc,llen,n;
2298 const unsigned char *p,*q;
2300 STACK_OF(X509) *sk=NULL;
2302 n=ssl3_get_message(s,
2309 if (!ok) return((int)n);
2311 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2313 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2314 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2316 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2317 al=SSL_AD_HANDSHAKE_FAILURE;
2320 /* If tls asked for a client cert, the client must return a 0 list */
2321 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2323 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2324 al=SSL_AD_UNEXPECTED_MESSAGE;
2327 s->s3->tmp.reuse_message=1;
2331 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2333 al=SSL_AD_UNEXPECTED_MESSAGE;
2334 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2337 p=d=(unsigned char *)s->init_msg;
2339 if ((sk=sk_X509_new_null()) == NULL)
2341 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2348 al=SSL_AD_DECODE_ERROR;
2349 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2352 for (nc=0; nc<llen; )
2355 if ((l+nc+3) > llen)
2357 al=SSL_AD_DECODE_ERROR;
2358 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2363 x=d2i_X509(NULL,&p,l);
2366 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2371 al=SSL_AD_DECODE_ERROR;
2372 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2375 if (!sk_X509_push(sk,x))
2377 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2384 if (sk_X509_num(sk) <= 0)
2386 /* TLS does not mind 0 certs returned */
2387 if (s->version == SSL3_VERSION)
2389 al=SSL_AD_HANDSHAKE_FAILURE;
2390 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2393 /* Fail for TLS only if we required a certificate */
2394 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2395 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2397 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2398 al=SSL_AD_HANDSHAKE_FAILURE;
2404 i=ssl_verify_cert_chain(s,sk);
2407 al=ssl_verify_alarm_type(s->verify_result);
2408 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2413 if (s->session->peer != NULL) /* This should not be needed */
2414 X509_free(s->session->peer);
2415 s->session->peer=sk_X509_shift(sk);
2416 s->session->verify_result = s->verify_result;
2418 /* With the current implementation, sess_cert will always be NULL
2419 * when we arrive here. */
2420 if (s->session->sess_cert == NULL)
2422 s->session->sess_cert = ssl_sess_cert_new();
2423 if (s->session->sess_cert == NULL)
2425 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2429 if (s->session->sess_cert->cert_chain != NULL)
2430 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2431 s->session->sess_cert->cert_chain=sk;
2432 /* Inconsistency alert: cert_chain does *not* include the
2433 * peer's own certificate, while we do include it in s3_clnt.c */
2441 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2444 if (x != NULL) X509_free(x);
2445 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2449 int ssl3_send_server_certificate(SSL *s)
2454 if (s->state == SSL3_ST_SW_CERT_A)
2456 x=ssl_get_server_send_cert(s);
2458 /* VRS: allow null cert if auth == KRB5 */
2459 (s->s3->tmp.new_cipher->algorithms
2460 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2461 != (SSL_aKRB5|SSL_kKRB5))
2463 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2467 l=ssl3_output_cert_chain(s,x);
2468 s->state=SSL3_ST_SW_CERT_B;
2473 /* SSL3_ST_SW_CERT_B */
2474 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2478 #ifndef OPENSSL_NO_ECDH
2479 /* This is the complement of curve_id2nid in s3_clnt.c. */
2480 static int nid2curve_id(int nid)
2482 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2483 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2485 case NID_sect163k1: /* sect163k1 (1) */
2487 case NID_sect163r1: /* sect163r1 (2) */
2489 case NID_sect163r2: /* sect163r2 (3) */
2491 case NID_sect193r1: /* sect193r1 (4) */
2493 case NID_sect193r2: /* sect193r2 (5) */
2495 case NID_sect233k1: /* sect233k1 (6) */
2497 case NID_sect233r1: /* sect233r1 (7) */
2499 case NID_sect239k1: /* sect239k1 (8) */
2501 case NID_sect283k1: /* sect283k1 (9) */
2503 case NID_sect283r1: /* sect283r1 (10) */
2505 case NID_sect409k1: /* sect409k1 (11) */
2507 case NID_sect409r1: /* sect409r1 (12) */
2509 case NID_sect571k1: /* sect571k1 (13) */
2511 case NID_sect571r1: /* sect571r1 (14) */
2513 case NID_secp160k1: /* secp160k1 (15) */
2515 case NID_secp160r1: /* secp160r1 (16) */
2517 case NID_secp160r2: /* secp160r2 (17) */
2519 case NID_secp192k1: /* secp192k1 (18) */
2521 case NID_X9_62_prime192v1: /* secp192r1 (19) */
2523 case NID_secp224k1: /* secp224k1 (20) */
2525 case NID_secp224r1: /* secp224r1 (21) */
2527 case NID_secp256k1: /* secp256k1 (22) */
2529 case NID_X9_62_prime256v1: /* secp256r1 (23) */
2531 case NID_secp384r1: /* secp384r1 (24) */
2533 case NID_secp521r1: /* secp521r1 (25) */