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) 1998-2006 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 #ifndef OPENSSL_NO_DH
137 #include <openssl/dh.h>
139 #include <openssl/bn.h>
140 #ifndef OPENSSL_NO_KRB5
141 #include <openssl/krb5_asn.h>
143 #include <openssl/md5.h>
145 static const SSL_METHOD *ssl3_get_server_method(int ver);
147 #ifndef OPENSSL_NO_ECDH
148 static int nid2curve_id(int nid);
151 static const SSL_METHOD *ssl3_get_server_method(int ver)
153 if (ver == SSL3_VERSION)
154 return(SSLv3_server_method());
159 IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
161 ssl_undefined_function,
162 ssl3_get_server_method)
164 int ssl3_accept(SSL *s)
167 unsigned long l,Time=(unsigned long)time(NULL);
168 void (*cb)(const SSL *ssl,int type,int val)=NULL;
171 int new_state,state,skip=0;
173 RAND_add(&Time,sizeof(Time),0);
177 if (s->info_callback != NULL)
179 else if (s->ctx->info_callback != NULL)
180 cb=s->ctx->info_callback;
182 /* init things to blank */
184 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
188 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
198 case SSL_ST_RENEGOTIATE:
200 /* s->state=SSL_ST_ACCEPT; */
204 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
205 case SSL_ST_OK|SSL_ST_ACCEPT:
208 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
210 if ((s->version>>8) != 3)
212 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
215 s->type=SSL_ST_ACCEPT;
217 if (s->init_buf == NULL)
219 if ((buf=BUF_MEM_new()) == NULL)
224 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
232 if (!ssl3_setup_buffers(s))
240 if (s->state != SSL_ST_RENEGOTIATE)
242 /* Ok, we now need to push on a buffering BIO so that
243 * the output is sent in a way that TCP likes :-)
245 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
247 ssl3_init_finished_mac(s);
248 s->state=SSL3_ST_SR_CLNT_HELLO_A;
249 s->ctx->stats.sess_accept++;
253 /* s->state == SSL_ST_RENEGOTIATE,
254 * we will just send a HelloRequest */
255 s->ctx->stats.sess_accept_renegotiate++;
256 s->state=SSL3_ST_SW_HELLO_REQ_A;
260 case SSL3_ST_SW_HELLO_REQ_A:
261 case SSL3_ST_SW_HELLO_REQ_B:
264 ret=ssl3_send_hello_request(s);
265 if (ret <= 0) goto end;
266 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
267 s->state=SSL3_ST_SW_FLUSH;
270 ssl3_init_finished_mac(s);
273 case SSL3_ST_SW_HELLO_REQ_C:
277 case SSL3_ST_SR_CLNT_HELLO_A:
278 case SSL3_ST_SR_CLNT_HELLO_B:
279 case SSL3_ST_SR_CLNT_HELLO_C:
282 ret=ssl3_get_client_hello(s);
283 if (ret <= 0) goto end;
284 #ifndef OPENSSL_NO_TLSEXT
287 warn = ssl_check_tlsext(s,&al);
289 ssl3_send_alert(s,SSL3_AL_WARNING,al);
291 ssl3_send_alert(s,SSL3_AL_FATAL,al);
292 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLS_EXT);
299 s->state=SSL3_ST_SW_SRVR_HELLO_A;
303 case SSL3_ST_SW_SRVR_HELLO_A:
304 case SSL3_ST_SW_SRVR_HELLO_B:
305 ret=ssl3_send_server_hello(s);
306 if (ret <= 0) goto end;
309 s->state=SSL3_ST_SW_CHANGE_A;
311 s->state=SSL3_ST_SW_CERT_A;
315 case SSL3_ST_SW_CERT_A:
316 case SSL3_ST_SW_CERT_B:
317 /* Check if it is anon DH or anon ECDH */
318 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
320 ret=ssl3_send_server_certificate(s);
321 if (ret <= 0) goto end;
325 s->state=SSL3_ST_SW_KEY_EXCH_A;
329 case SSL3_ST_SW_KEY_EXCH_A:
330 case SSL3_ST_SW_KEY_EXCH_B:
331 l=s->s3->tmp.new_cipher->algorithms;
333 /* clear this, it may get reset by
334 * send_server_key_exchange */
335 if ((s->options & SSL_OP_EPHEMERAL_RSA)
336 #ifndef OPENSSL_NO_KRB5
338 #endif /* OPENSSL_NO_KRB5 */
340 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
341 * even when forbidden by protocol specs
342 * (handshake may fail as clients are not required to
343 * be able to handle this) */
344 s->s3->tmp.use_rsa_tmp=1;
346 s->s3->tmp.use_rsa_tmp=0;
349 /* only send if a DH key exchange, fortezza or
350 * RSA but we have a sign only certificate
352 * For ECC ciphersuites, we send a serverKeyExchange
353 * message only if the cipher suite is either
354 * ECDH-anon or ECDHE. In other cases, the
355 * server certificate contains the server's
356 * public key for key exchange.
358 if (s->s3->tmp.use_rsa_tmp
360 || (l & (SSL_DH|SSL_kFZA))
362 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
363 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
364 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
370 ret=ssl3_send_server_key_exchange(s);
371 if (ret <= 0) goto end;
376 s->state=SSL3_ST_SW_CERT_REQ_A;
380 case SSL3_ST_SW_CERT_REQ_A:
381 case SSL3_ST_SW_CERT_REQ_B:
382 if (/* don't request cert unless asked for it: */
383 !(s->verify_mode & SSL_VERIFY_PEER) ||
384 /* if SSL_VERIFY_CLIENT_ONCE is set,
385 * don't request cert during re-negotiation: */
386 ((s->session->peer != NULL) &&
387 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
388 /* never request cert in anonymous ciphersuites
389 * (see section "Certificate request" in SSL 3 drafts
390 * and in RFC 2246): */
391 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
392 /* ... except when the application insists on verification
393 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
394 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
395 /* never request cert in Kerberos ciphersuites */
396 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
398 /* no cert request */
400 s->s3->tmp.cert_request=0;
401 s->state=SSL3_ST_SW_SRVR_DONE_A;
405 s->s3->tmp.cert_request=1;
406 ret=ssl3_send_certificate_request(s);
407 if (ret <= 0) goto end;
408 #ifndef NETSCAPE_HANG_BUG
409 s->state=SSL3_ST_SW_SRVR_DONE_A;
411 s->state=SSL3_ST_SW_FLUSH;
412 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
418 case SSL3_ST_SW_SRVR_DONE_A:
419 case SSL3_ST_SW_SRVR_DONE_B:
420 ret=ssl3_send_server_done(s);
421 if (ret <= 0) goto end;
422 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
423 s->state=SSL3_ST_SW_FLUSH;
427 case SSL3_ST_SW_FLUSH:
428 /* number of bytes to be flushed */
429 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
432 s->rwstate=SSL_WRITING;
433 num1=BIO_flush(s->wbio);
434 if (num1 <= 0) { ret= -1; goto end; }
435 s->rwstate=SSL_NOTHING;
438 s->state=s->s3->tmp.next_state;
441 case SSL3_ST_SR_CERT_A:
442 case SSL3_ST_SR_CERT_B:
443 /* Check for second client hello (MS SGC) */
444 ret = ssl3_check_client_hello(s);
448 s->state = SSL3_ST_SR_CLNT_HELLO_C;
450 if (s->s3->tmp.cert_request)
452 ret=ssl3_get_client_certificate(s);
453 if (ret <= 0) goto end;
456 s->state=SSL3_ST_SR_KEY_EXCH_A;
460 case SSL3_ST_SR_KEY_EXCH_A:
461 case SSL3_ST_SR_KEY_EXCH_B:
462 ret=ssl3_get_client_key_exchange(s);
467 /* For the ECDH ciphersuites when
468 * the client sends its ECDH pub key in
469 * a certificate, the CertificateVerify
470 * message is not sent.
472 s->state=SSL3_ST_SR_FINISHED_A;
477 s->state=SSL3_ST_SR_CERT_VRFY_A;
480 /* We need to get hashes here so if there is
481 * a client cert, it can be verified
483 s->method->ssl3_enc->cert_verify_mac(s,
484 &(s->s3->finish_dgst1),
485 &(s->s3->tmp.cert_verify_md[0]));
486 s->method->ssl3_enc->cert_verify_mac(s,
487 &(s->s3->finish_dgst2),
488 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
492 case SSL3_ST_SR_CERT_VRFY_A:
493 case SSL3_ST_SR_CERT_VRFY_B:
495 /* we should decide if we expected this one */
496 ret=ssl3_get_cert_verify(s);
497 if (ret <= 0) goto end;
499 s->state=SSL3_ST_SR_FINISHED_A;
503 case SSL3_ST_SR_FINISHED_A:
504 case SSL3_ST_SR_FINISHED_B:
505 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
506 SSL3_ST_SR_FINISHED_B);
507 if (ret <= 0) goto end;
511 s->state=SSL3_ST_SW_CHANGE_A;
515 case SSL3_ST_SW_CHANGE_A:
516 case SSL3_ST_SW_CHANGE_B:
518 s->session->cipher=s->s3->tmp.new_cipher;
519 if (!s->method->ssl3_enc->setup_key_block(s))
520 { ret= -1; goto end; }
522 ret=ssl3_send_change_cipher_spec(s,
523 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
525 if (ret <= 0) goto end;
526 s->state=SSL3_ST_SW_FINISHED_A;
529 if (!s->method->ssl3_enc->change_cipher_state(s,
530 SSL3_CHANGE_CIPHER_SERVER_WRITE))
538 case SSL3_ST_SW_FINISHED_A:
539 case SSL3_ST_SW_FINISHED_B:
540 ret=ssl3_send_finished(s,
541 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
542 s->method->ssl3_enc->server_finished_label,
543 s->method->ssl3_enc->server_finished_label_len);
544 if (ret <= 0) goto end;
545 s->state=SSL3_ST_SW_FLUSH;
547 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
549 s->s3->tmp.next_state=SSL_ST_OK;
554 /* clean a few things up */
555 ssl3_cleanup_key_block(s);
557 BUF_MEM_free(s->init_buf);
560 /* remove buffering on output */
561 ssl_free_wbio_buffer(s);
565 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
567 /* actually not necessarily a 'new' session unless
568 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
572 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
574 s->ctx->stats.sess_accept_good++;
576 s->handshake_func=ssl3_accept;
578 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
586 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
592 if (!s->s3->tmp.reuse_message && !skip)
596 if ((ret=BIO_flush(s->wbio)) <= 0)
601 if ((cb != NULL) && (s->state != state))
605 cb(s,SSL_CB_ACCEPT_LOOP,1);
612 /* BIO_flush(s->wbio); */
616 cb(s,SSL_CB_ACCEPT_EXIT,ret);
620 int ssl3_send_hello_request(SSL *s)
624 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
626 p=(unsigned char *)s->init_buf->data;
627 *(p++)=SSL3_MT_HELLO_REQUEST;
632 s->state=SSL3_ST_SW_HELLO_REQ_B;
633 /* number of bytes to write */
638 /* SSL3_ST_SW_HELLO_REQ_B */
639 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
642 int ssl3_check_client_hello(SSL *s)
647 /* this function is called when we really expect a Certificate message,
648 * so permit appropriate message length */
649 n=s->method->ssl_get_message(s,
655 if (!ok) return((int)n);
656 s->s3->tmp.reuse_message = 1;
657 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
659 /* Throw away what we have done so far in the current handshake,
660 * which will now be aborted. (A full SSL_clear would be too much.)
661 * I hope that tmp.dh is the only thing that may need to be cleared
662 * when a handshake is not completed ... */
663 #ifndef OPENSSL_NO_DH
664 if (s->s3->tmp.dh != NULL)
666 DH_free(s->s3->tmp.dh);
667 s->s3->tmp.dh = NULL;
675 int ssl3_get_client_hello(SSL *s)
677 int i,j,ok,al,ret= -1;
678 unsigned int cookie_len;
681 unsigned char *p,*d,*q;
683 #ifndef OPENSSL_NO_COMP
686 STACK_OF(SSL_CIPHER) *ciphers=NULL;
688 /* We do this so that we will respond with our native type.
689 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
690 * This down switching should be handled by a different method.
691 * If we are SSLv3, we will respond with SSLv3, even if prompted with
694 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
697 s->state=SSL3_ST_SR_CLNT_HELLO_B;
699 n=s->method->ssl_get_message(s,
700 SSL3_ST_SR_CLNT_HELLO_B,
701 SSL3_ST_SR_CLNT_HELLO_C,
702 SSL3_MT_CLIENT_HELLO,
703 SSL3_RT_MAX_PLAIN_LENGTH,
706 if (!ok) return((int)n);
707 d=p=(unsigned char *)s->init_msg;
709 /* use version from inside client hello, not from record header
710 * (may differ: see RFC 2246, Appendix E, second paragraph) */
711 s->client_version=(((int)p[0])<<8)|(int)p[1];
714 if (s->client_version < s->version)
716 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
717 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
719 /* similar to ssl3_get_record, send alert using remote version number */
720 s->version = s->client_version;
722 al = SSL_AD_PROTOCOL_VERSION;
726 /* load the client random */
727 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
730 /* get the session-id */
734 /* Versions before 0.9.7 always allow session reuse during renegotiation
735 * (i.e. when s->new_session is true), option
736 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
737 * Maybe this optional behaviour should always have been the default,
738 * but we cannot safely change the default behaviour (or new applications
739 * might be written that become totally unsecure when compiled with
740 * an earlier library version)
742 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
744 if (!ssl_get_new_session(s,1))
749 i=ssl_get_prev_session(s,p,j);
751 { /* previous session */
758 if (!ssl_get_new_session(s,1))
765 if (SSL_version(s) == DTLS1_VERSION)
770 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
771 s->d1->send_cookie == 0)
773 /* HelloVerifyMessage has already been sent */
774 if ( cookie_len != s->d1->cookie_len)
776 al = SSL_AD_HANDSHAKE_FAILURE;
777 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
783 * The ClientHello may contain a cookie even if the
784 * HelloVerify message has not been sent--make sure that it
785 * does not cause an overflow.
787 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
790 al = SSL_AD_DECODE_ERROR;
791 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
795 /* verify the cookie if appropriate option is set. */
796 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
799 memcpy(s->d1->rcvd_cookie, p, cookie_len);
801 if ( s->ctx->app_verify_cookie_cb != NULL)
803 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
806 al=SSL_AD_HANDSHAKE_FAILURE;
807 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
808 SSL_R_COOKIE_MISMATCH);
811 /* else cookie verification succeeded */
813 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
814 s->d1->cookie_len) != 0) /* default verification */
816 al=SSL_AD_HANDSHAKE_FAILURE;
817 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
818 SSL_R_COOKIE_MISMATCH);
827 if ((i == 0) && (j != 0))
829 /* we need a cipher if we are not resuming a session */
830 al=SSL_AD_ILLEGAL_PARAMETER;
831 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
836 /* not enough data */
837 al=SSL_AD_DECODE_ERROR;
838 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
841 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
848 /* If it is a hit, check that the cipher is in the list */
849 if ((s->hit) && (i > 0))
852 id=s->session->cipher->id;
855 printf("client sent %d ciphers\n",sk_num(ciphers));
857 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
859 c=sk_SSL_CIPHER_value(ciphers,i);
861 printf("client [%2d of %2d]:%s\n",
862 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
872 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
874 /* Very bad for multi-threading.... */
875 s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0);
879 /* we need to have the cipher in the cipher
880 * list if we are asked to reuse it */
881 al=SSL_AD_ILLEGAL_PARAMETER;
882 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
892 /* not enough data */
893 al=SSL_AD_DECODE_ERROR;
894 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
900 if (p[j] == 0) break;
907 al=SSL_AD_DECODE_ERROR;
908 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
912 /* Worst case, we will use the NULL compression, but if we have other
913 * options, we will now look for them. We have i-1 compression
914 * algorithms from the client, starting at q. */
915 s->s3->tmp.new_compression=NULL;
916 #ifndef OPENSSL_NO_COMP
917 if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
918 { /* See if we have a match */
921 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
924 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
937 s->s3->tmp.new_compression=comp;
943 #ifndef OPENSSL_NO_TLSEXT
945 if (s->version > SSL3_VERSION)
947 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
949 /* 'al' set by ssl_parse_clienthello_tlsext */
950 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLS_EXT);
956 /* Given s->session->ciphers and SSL_get_ciphers, we must
961 #ifdef OPENSSL_NO_COMP
962 s->session->compress_meth=0;
964 s->session->compress_meth=(comp == NULL)?0:comp->id;
966 if (s->session->ciphers != NULL)
967 sk_SSL_CIPHER_free(s->session->ciphers);
968 s->session->ciphers=ciphers;
971 al=SSL_AD_ILLEGAL_PARAMETER;
972 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
976 c=ssl3_choose_cipher(s,s->session->ciphers,
981 al=SSL_AD_HANDSHAKE_FAILURE;
982 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
985 s->s3->tmp.new_cipher=c;
989 /* Session-id reuse */
990 #ifdef REUSE_CIPHER_BUG
991 STACK_OF(SSL_CIPHER) *sk;
995 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
997 sk=s->session->ciphers;
998 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1000 c=sk_SSL_CIPHER_value(sk,i);
1001 if (c->algorithms & SSL_eNULL)
1003 if (SSL_C_IS_EXPORT(c))
1007 s->s3->tmp.new_cipher=nc;
1008 else if (ec != NULL)
1009 s->s3->tmp.new_cipher=ec;
1011 s->s3->tmp.new_cipher=s->session->cipher;
1015 s->s3->tmp.new_cipher=s->session->cipher;
1018 /* we now have the following setup.
1020 * cipher_list - our prefered list of ciphers
1021 * ciphers - the clients prefered list of ciphers
1022 * compression - basically ignored right now
1023 * ssl version is set - sslv3
1024 * s->session - The ssl session has been setup.
1025 * s->hit - session reuse flag
1026 * s->tmp.new_cipher - the new cipher to use.
1033 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1036 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1040 int ssl3_send_server_hello(SSL *s)
1043 unsigned char *p,*d;
1045 unsigned long l,Time;
1047 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1049 buf=(unsigned char *)s->init_buf->data;
1050 p=s->s3->server_random;
1051 Time=(unsigned long)time(NULL); /* Time */
1053 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1055 /* Do the message type and length last */
1058 *(p++)=s->version>>8;
1059 *(p++)=s->version&0xff;
1062 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1063 p+=SSL3_RANDOM_SIZE;
1065 /* now in theory we have 3 options to sending back the
1066 * session id. If it is a re-use, we send back the
1067 * old session-id, if it is a new session, we send
1068 * back the new session-id or we send back a 0 length
1069 * session-id if we want it to be single use.
1070 * Currently I will not implement the '0' length session-id
1071 * 12-Jan-98 - I'll now support the '0' length stuff.
1073 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
1074 s->session->session_id_length=0;
1076 sl=s->session->session_id_length;
1077 if (sl > (int)sizeof(s->session->session_id))
1079 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1083 memcpy(p,s->session->session_id,sl);
1086 /* put the cipher */
1087 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1090 /* put the compression method */
1091 #ifdef OPENSSL_NO_COMP
1094 if (s->s3->tmp.new_compression == NULL)
1097 *(p++)=s->s3->tmp.new_compression->id;
1099 #ifndef OPENSSL_NO_TLSEXT
1100 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1102 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1110 *(d++)=SSL3_MT_SERVER_HELLO;
1113 s->state=SSL3_ST_CW_CLNT_HELLO_B;
1114 /* number of bytes to write */
1119 /* SSL3_ST_CW_CLNT_HELLO_B */
1120 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1123 int ssl3_send_server_done(SSL *s)
1127 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1129 p=(unsigned char *)s->init_buf->data;
1132 *(p++)=SSL3_MT_SERVER_DONE;
1137 s->state=SSL3_ST_SW_SRVR_DONE_B;
1138 /* number of bytes to write */
1143 /* SSL3_ST_CW_CLNT_HELLO_B */
1144 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1147 int ssl3_send_server_key_exchange(SSL *s)
1149 #ifndef OPENSSL_NO_RSA
1153 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1156 #ifndef OPENSSL_NO_DH
1159 #ifndef OPENSSL_NO_ECDH
1160 EC_KEY *ecdh=NULL, *ecdhp;
1161 unsigned char *encodedPoint = NULL;
1164 BN_CTX *bn_ctx = NULL;
1167 unsigned char *p,*d;
1177 EVP_MD_CTX_init(&md_ctx);
1178 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1180 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1185 r[0]=r[1]=r[2]=r[3]=NULL;
1187 #ifndef OPENSSL_NO_RSA
1188 if (type & SSL_kRSA)
1191 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1193 rsa=s->cert->rsa_tmp_cb(s,
1194 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1195 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1198 al=SSL_AD_HANDSHAKE_FAILURE;
1199 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1207 al=SSL_AD_HANDSHAKE_FAILURE;
1208 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1213 s->s3->tmp.use_rsa_tmp=1;
1217 #ifndef OPENSSL_NO_DH
1218 if (type & SSL_kEDH)
1221 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1222 dhp=s->cert->dh_tmp_cb(s,
1223 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1224 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1227 al=SSL_AD_HANDSHAKE_FAILURE;
1228 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1232 if (s->s3->tmp.dh != NULL)
1235 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1239 if ((dh=DHparams_dup(dhp)) == NULL)
1241 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1246 if ((dhp->pub_key == NULL ||
1247 dhp->priv_key == NULL ||
1248 (s->options & SSL_OP_SINGLE_DH_USE)))
1250 if(!DH_generate_key(dh))
1252 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1259 dh->pub_key=BN_dup(dhp->pub_key);
1260 dh->priv_key=BN_dup(dhp->priv_key);
1261 if ((dh->pub_key == NULL) ||
1262 (dh->priv_key == NULL))
1264 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1274 #ifndef OPENSSL_NO_ECDH
1275 if (type & SSL_kECDHE)
1277 const EC_GROUP *group;
1279 ecdhp=cert->ecdh_tmp;
1280 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1282 ecdhp=s->cert->ecdh_tmp_cb(s,
1283 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1284 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1288 al=SSL_AD_HANDSHAKE_FAILURE;
1289 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1293 if (s->s3->tmp.ecdh != NULL)
1295 EC_KEY_free(s->s3->tmp.ecdh);
1296 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1300 /* Duplicate the ECDH structure. */
1303 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1306 if (!EC_KEY_up_ref(ecdhp))
1308 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1313 s->s3->tmp.ecdh=ecdh;
1314 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1315 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1316 (s->options & SSL_OP_SINGLE_ECDH_USE))
1318 if(!EC_KEY_generate_key(ecdh))
1320 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1325 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1326 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1327 (EC_KEY_get0_private_key(ecdh) == NULL))
1329 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1333 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1334 (EC_GROUP_get_degree(group) > 163))
1336 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1340 /* XXX: For now, we only support ephemeral ECDH
1341 * keys over named (not generic) curves. For
1342 * supported named curves, curve_id is non-zero.
1345 nid2curve_id(EC_GROUP_get_curve_name(group)))
1348 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1352 /* Encode the public key.
1353 * First check the size of encoding and
1354 * allocate memory accordingly.
1356 encodedlen = EC_POINT_point2oct(group,
1357 EC_KEY_get0_public_key(ecdh),
1358 POINT_CONVERSION_UNCOMPRESSED,
1361 encodedPoint = (unsigned char *)
1362 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1363 bn_ctx = BN_CTX_new();
1364 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1366 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1371 encodedlen = EC_POINT_point2oct(group,
1372 EC_KEY_get0_public_key(ecdh),
1373 POINT_CONVERSION_UNCOMPRESSED,
1374 encodedPoint, encodedlen, bn_ctx);
1376 if (encodedlen == 0)
1378 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1382 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1384 /* XXX: For now, we only support named (not
1385 * generic) curves in ECDH ephemeral key exchanges.
1386 * In this situation, we need four additional bytes
1387 * to encode the entire ServerECDHParams
1392 /* We'll generate the serverKeyExchange message
1393 * explicitly so we can set these to NULLs
1401 #endif /* !OPENSSL_NO_ECDH */
1403 al=SSL_AD_HANDSHAKE_FAILURE;
1404 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1407 for (i=0; r[i] != NULL; i++)
1409 nr[i]=BN_num_bytes(r[i]);
1413 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1415 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1418 al=SSL_AD_DECODE_ERROR;
1421 kn=EVP_PKEY_size(pkey);
1429 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1431 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1434 d=(unsigned char *)s->init_buf->data;
1437 for (i=0; r[i] != NULL; i++)
1444 #ifndef OPENSSL_NO_ECDH
1445 if (type & SSL_kECDHE)
1447 /* XXX: For now, we only support named (not generic) curves.
1448 * In this situation, the serverKeyExchange message has:
1449 * [1 byte CurveType], [2 byte CurveName]
1450 * [1 byte length of encoded point], followed by
1451 * the actual encoded point itself
1453 *p = NAMED_CURVE_TYPE;
1461 memcpy((unsigned char*)p,
1462 (unsigned char *)encodedPoint,
1464 OPENSSL_free(encodedPoint);
1472 /* n is the length of the params, they start at &(d[4])
1473 * and p points to the space at the end. */
1474 #ifndef OPENSSL_NO_RSA
1475 if (pkey->type == EVP_PKEY_RSA)
1479 for (num=2; num > 0; num--)
1481 EVP_DigestInit_ex(&md_ctx,(num == 2)
1482 ?s->ctx->md5:s->ctx->sha1, NULL);
1483 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1484 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1485 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1486 EVP_DigestFinal_ex(&md_ctx,q,
1487 (unsigned int *)&i);
1491 if (RSA_sign(NID_md5_sha1, md_buf, j,
1492 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1494 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1502 #if !defined(OPENSSL_NO_DSA)
1503 if (pkey->type == EVP_PKEY_DSA)
1506 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1507 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1508 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1509 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1510 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1511 (unsigned int *)&i,pkey))
1513 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1521 #if !defined(OPENSSL_NO_ECDSA)
1522 if (pkey->type == EVP_PKEY_EC)
1524 /* let's do ECDSA */
1525 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1526 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1527 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1528 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1529 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1530 (unsigned int *)&i,pkey))
1532 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1541 /* Is this error check actually needed? */
1542 al=SSL_AD_HANDSHAKE_FAILURE;
1543 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1548 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1551 /* we should now have things packed up, so lets send
1557 s->state = SSL3_ST_SW_KEY_EXCH_B;
1558 EVP_MD_CTX_cleanup(&md_ctx);
1559 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1561 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1563 #ifndef OPENSSL_NO_ECDH
1564 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1565 BN_CTX_free(bn_ctx);
1567 EVP_MD_CTX_cleanup(&md_ctx);
1571 int ssl3_send_certificate_request(SSL *s)
1573 unsigned char *p,*d;
1575 STACK_OF(X509_NAME) *sk=NULL;
1579 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1583 d=p=(unsigned char *)&(buf->data[4]);
1585 /* get the list of acceptable cert types */
1587 n=ssl3_get_req_cert_type(s,p);
1596 sk=SSL_get_client_CA_list(s);
1600 for (i=0; i<sk_X509_NAME_num(sk); i++)
1602 name=sk_X509_NAME_value(sk,i);
1603 j=i2d_X509_NAME(name,NULL);
1604 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1606 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1609 p=(unsigned char *)&(buf->data[4+n]);
1610 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1613 i2d_X509_NAME(name,&p);
1620 i2d_X509_NAME(name,&p);
1621 j-=2; s2n(j,d); j+=2;
1627 /* else no CA names */
1628 p=(unsigned char *)&(buf->data[4+off]);
1631 d=(unsigned char *)buf->data;
1632 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1635 /* we should now have things packed up, so lets send
1640 #ifdef NETSCAPE_HANG_BUG
1641 p=(unsigned char *)s->init_buf->data + s->init_num;
1644 *(p++)=SSL3_MT_SERVER_DONE;
1651 s->state = SSL3_ST_SW_CERT_REQ_B;
1654 /* SSL3_ST_SW_CERT_REQ_B */
1655 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1660 int ssl3_get_client_key_exchange(SSL *s)
1666 #ifndef OPENSSL_NO_RSA
1668 EVP_PKEY *pkey=NULL;
1670 #ifndef OPENSSL_NO_DH
1674 #ifndef OPENSSL_NO_KRB5
1676 #endif /* OPENSSL_NO_KRB5 */
1678 #ifndef OPENSSL_NO_ECDH
1679 EC_KEY *srvr_ecdh = NULL;
1680 EVP_PKEY *clnt_pub_pkey = NULL;
1681 EC_POINT *clnt_ecpoint = NULL;
1682 BN_CTX *bn_ctx = NULL;
1685 n=s->method->ssl_get_message(s,
1686 SSL3_ST_SR_KEY_EXCH_A,
1687 SSL3_ST_SR_KEY_EXCH_B,
1688 SSL3_MT_CLIENT_KEY_EXCHANGE,
1692 if (!ok) return((int)n);
1693 p=(unsigned char *)s->init_msg;
1695 l=s->s3->tmp.new_cipher->algorithms;
1697 #ifndef OPENSSL_NO_RSA
1700 /* FIX THIS UP EAY EAY EAY EAY */
1701 if (s->s3->tmp.use_rsa_tmp)
1703 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1704 rsa=s->cert->rsa_tmp;
1705 /* Don't do a callback because rsa_tmp should
1706 * be sent already */
1709 al=SSL_AD_HANDSHAKE_FAILURE;
1710 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1717 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1718 if ( (pkey == NULL) ||
1719 (pkey->type != EVP_PKEY_RSA) ||
1720 (pkey->pkey.rsa == NULL))
1722 al=SSL_AD_HANDSHAKE_FAILURE;
1723 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1730 if (s->version > SSL3_VERSION)
1735 if (!(s->options & SSL_OP_TLS_D5_BUG))
1737 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1747 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1751 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1753 al=SSL_AD_DECODE_ERROR;
1754 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1757 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1759 /* The premaster secret must contain the same version number as the
1760 * ClientHello to detect version rollback attacks (strangely, the
1761 * protocol does not offer such protection for DH ciphersuites).
1762 * However, buggy clients exist that send the negotiated protocol
1763 * version instead if the server does not support the requested
1765 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1766 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1767 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1769 al=SSL_AD_DECODE_ERROR;
1770 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1772 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1773 * (http://eprint.iacr.org/2003/052/) exploits the version
1774 * number check as a "bad version oracle" -- an alert would
1775 * reveal that the plaintext corresponding to some ciphertext
1776 * made up by the adversary is properly formatted except
1777 * that the version number is wrong. To avoid such attacks,
1778 * we should treat this just like any other decryption error. */
1784 /* Some decryption failure -- use random value instead as countermeasure
1785 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1786 * (see RFC 2246, section 7.4.7.1). */
1788 i = SSL_MAX_MASTER_KEY_LENGTH;
1789 p[0] = s->client_version >> 8;
1790 p[1] = s->client_version & 0xff;
1791 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
1795 s->session->master_key_length=
1796 s->method->ssl3_enc->generate_master_secret(s,
1797 s->session->master_key,
1799 OPENSSL_cleanse(p,i);
1803 #ifndef OPENSSL_NO_DH
1804 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1809 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1811 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1821 if (n == 0L) /* the parameters are in the cert */
1823 al=SSL_AD_HANDSHAKE_FAILURE;
1824 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1829 if (s->s3->tmp.dh == NULL)
1831 al=SSL_AD_HANDSHAKE_FAILURE;
1832 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1836 dh_srvr=s->s3->tmp.dh;
1839 pub=BN_bin2bn(p,i,NULL);
1842 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1846 i=DH_compute_key(p,pub,dh_srvr);
1850 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1854 DH_free(s->s3->tmp.dh);
1859 s->session->master_key_length=
1860 s->method->ssl3_enc->generate_master_secret(s,
1861 s->session->master_key,p,i);
1862 OPENSSL_cleanse(p,i);
1866 #ifndef OPENSSL_NO_KRB5
1869 krb5_error_code krb5rc;
1870 krb5_data enc_ticket;
1871 krb5_data authenticator;
1873 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1874 EVP_CIPHER_CTX ciph_ctx;
1875 EVP_CIPHER *enc = NULL;
1876 unsigned char iv[EVP_MAX_IV_LENGTH];
1877 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1878 + EVP_MAX_BLOCK_LENGTH];
1880 krb5_timestamp authtime = 0;
1881 krb5_ticket_times ttimes;
1883 EVP_CIPHER_CTX_init(&ciph_ctx);
1885 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1888 enc_ticket.length = i;
1890 if (n < enc_ticket.length + 6)
1892 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1893 SSL_R_DATA_LENGTH_TOO_LONG);
1897 enc_ticket.data = (char *)p;
1898 p+=enc_ticket.length;
1901 authenticator.length = i;
1903 if (n < enc_ticket.length + authenticator.length + 6)
1905 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1906 SSL_R_DATA_LENGTH_TOO_LONG);
1910 authenticator.data = (char *)p;
1911 p+=authenticator.length;
1915 enc_pms.data = (char *)p;
1918 /* Note that the length is checked again below,
1921 if(enc_pms.length > sizeof pms)
1923 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1924 SSL_R_DATA_LENGTH_TOO_LONG);
1928 if (n != (long)(enc_ticket.length + authenticator.length +
1929 enc_pms.length + 6))
1931 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1932 SSL_R_DATA_LENGTH_TOO_LONG);
1936 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1940 printf("kssl_sget_tkt rtn %d [%d]\n",
1941 krb5rc, kssl_err.reason);
1943 printf("kssl_err text= %s\n", kssl_err.text);
1944 #endif /* KSSL_DEBUG */
1945 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1950 /* Note: no authenticator is not considered an error,
1951 ** but will return authtime == 0.
1953 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1954 &authtime, &kssl_err)) != 0)
1957 printf("kssl_check_authent rtn %d [%d]\n",
1958 krb5rc, kssl_err.reason);
1960 printf("kssl_err text= %s\n", kssl_err.text);
1961 #endif /* KSSL_DEBUG */
1962 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1967 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1969 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
1974 kssl_ctx_show(kssl_ctx);
1975 #endif /* KSSL_DEBUG */
1977 enc = kssl_map_enc(kssl_ctx->enctype);
1981 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1983 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
1985 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1986 SSL_R_DECRYPTION_FAILED);
1989 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1990 (unsigned char *)enc_pms.data, enc_pms.length))
1992 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1993 SSL_R_DECRYPTION_FAILED);
1996 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1998 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1999 SSL_R_DATA_LENGTH_TOO_LONG);
2002 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2004 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2005 SSL_R_DECRYPTION_FAILED);
2009 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2011 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2012 SSL_R_DATA_LENGTH_TOO_LONG);
2015 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2017 s->session->master_key_length=
2018 s->method->ssl3_enc->generate_master_secret(s,
2019 s->session->master_key, pms, outl);
2021 if (kssl_ctx->client_princ)
2023 int len = strlen(kssl_ctx->client_princ);
2024 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2026 s->session->krb5_client_princ_len = len;
2027 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2032 /* Was doing kssl_ctx_free() here,
2033 ** but it caused problems for apache.
2034 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2035 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2039 #endif /* OPENSSL_NO_KRB5 */
2041 #ifndef OPENSSL_NO_ECDH
2042 if ((l & SSL_kECDH) || (l & SSL_kECDHE))
2047 const EC_GROUP *group;
2048 const BIGNUM *priv_key;
2050 /* initialize structures for server's ECDH key pair */
2051 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2053 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2054 ERR_R_MALLOC_FAILURE);
2058 /* Let's get server private key and group information */
2061 /* use the certificate */
2062 tkey = s->cert->key->privatekey->pkey.ec;
2066 /* use the ephermeral values we saved when
2067 * generating the ServerKeyExchange msg.
2069 tkey = s->s3->tmp.ecdh;
2072 group = EC_KEY_get0_group(tkey);
2073 priv_key = EC_KEY_get0_private_key(tkey);
2075 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2076 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2078 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2083 /* Let's get client's public key */
2084 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2086 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2087 ERR_R_MALLOC_FAILURE);
2093 /* Client Publickey was in Client Certificate */
2097 al=SSL_AD_HANDSHAKE_FAILURE;
2098 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2101 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2103 (clnt_pub_pkey->type != EVP_PKEY_EC))
2105 /* XXX: For now, we do not support client
2106 * authentication using ECDH certificates
2107 * so this branch (n == 0L) of the code is
2108 * never executed. When that support is
2109 * added, we ought to ensure the key
2110 * received in the certificate is
2111 * authorized for key agreement.
2112 * ECDH_compute_key implicitly checks that
2113 * the two ECDH shares are for the same
2116 al=SSL_AD_HANDSHAKE_FAILURE;
2117 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2118 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2122 EC_POINT_copy(clnt_ecpoint,
2123 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec));
2124 ret = 2; /* Skip certificate verify processing */
2128 /* Get client's public key from encoded point
2129 * in the ClientKeyExchange message.
2131 if ((bn_ctx = BN_CTX_new()) == NULL)
2133 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2134 ERR_R_MALLOC_FAILURE);
2138 /* Get encoded point length */
2141 if (EC_POINT_oct2point(group,
2142 clnt_ecpoint, p, i, bn_ctx) == 0)
2144 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2148 /* p is pointing to somewhere in the buffer
2149 * currently, so set it to the start
2151 p=(unsigned char *)s->init_buf->data;
2154 /* Compute the shared pre-master secret */
2155 field_size = EC_GROUP_get_degree(group);
2156 if (field_size <= 0)
2158 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2162 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2165 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2170 EVP_PKEY_free(clnt_pub_pkey);
2171 EC_POINT_free(clnt_ecpoint);
2172 if (srvr_ecdh != NULL)
2173 EC_KEY_free(srvr_ecdh);
2174 BN_CTX_free(bn_ctx);
2176 /* Compute the master secret */
2177 s->session->master_key_length = s->method->ssl3_enc-> \
2178 generate_master_secret(s, s->session->master_key, p, i);
2180 OPENSSL_cleanse(p, i);
2186 al=SSL_AD_HANDSHAKE_FAILURE;
2187 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2188 SSL_R_UNKNOWN_CIPHER_TYPE);
2194 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2195 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2198 #ifndef OPENSSL_NO_ECDH
2199 EVP_PKEY_free(clnt_pub_pkey);
2200 EC_POINT_free(clnt_ecpoint);
2201 if (srvr_ecdh != NULL)
2202 EC_KEY_free(srvr_ecdh);
2203 BN_CTX_free(bn_ctx);
2208 int ssl3_get_cert_verify(SSL *s)
2210 EVP_PKEY *pkey=NULL;
2217 n=s->method->ssl_get_message(s,
2218 SSL3_ST_SR_CERT_VRFY_A,
2219 SSL3_ST_SR_CERT_VRFY_B,
2224 if (!ok) return((int)n);
2226 if (s->session->peer != NULL)
2228 peer=s->session->peer;
2229 pkey=X509_get_pubkey(peer);
2230 type=X509_certificate_type(peer,pkey);
2238 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2240 s->s3->tmp.reuse_message=1;
2241 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2243 al=SSL_AD_UNEXPECTED_MESSAGE;
2244 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2253 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2254 al=SSL_AD_UNEXPECTED_MESSAGE;
2258 if (!(type & EVP_PKT_SIGN))
2260 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2261 al=SSL_AD_ILLEGAL_PARAMETER;
2265 if (s->s3->change_cipher_spec)
2267 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2268 al=SSL_AD_UNEXPECTED_MESSAGE;
2272 /* we now have a signature that we need to verify */
2273 p=(unsigned char *)s->init_msg;
2278 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2279 al=SSL_AD_DECODE_ERROR;
2283 j=EVP_PKEY_size(pkey);
2284 if ((i > j) || (n > j) || (n <= 0))
2286 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2287 al=SSL_AD_DECODE_ERROR;
2291 #ifndef OPENSSL_NO_RSA
2292 if (pkey->type == EVP_PKEY_RSA)
2294 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2295 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2299 al=SSL_AD_DECRYPT_ERROR;
2300 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2305 al=SSL_AD_DECRYPT_ERROR;
2306 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2312 #ifndef OPENSSL_NO_DSA
2313 if (pkey->type == EVP_PKEY_DSA)
2315 j=DSA_verify(pkey->save_type,
2316 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2317 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2321 al=SSL_AD_DECRYPT_ERROR;
2322 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2328 #ifndef OPENSSL_NO_ECDSA
2329 if (pkey->type == EVP_PKEY_EC)
2331 j=ECDSA_verify(pkey->save_type,
2332 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2333 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2337 al=SSL_AD_DECRYPT_ERROR;
2338 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2339 SSL_R_BAD_ECDSA_SIGNATURE);
2346 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2347 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2356 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2359 EVP_PKEY_free(pkey);
2363 int ssl3_get_client_certificate(SSL *s)
2365 int i,ok,al,ret= -1;
2367 unsigned long l,nc,llen,n;
2368 const unsigned char *p,*q;
2370 STACK_OF(X509) *sk=NULL;
2372 n=s->method->ssl_get_message(s,
2379 if (!ok) return((int)n);
2381 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2383 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2384 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2386 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2387 al=SSL_AD_HANDSHAKE_FAILURE;
2390 /* If tls asked for a client cert, the client must return a 0 list */
2391 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2393 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2394 al=SSL_AD_UNEXPECTED_MESSAGE;
2397 s->s3->tmp.reuse_message=1;
2401 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2403 al=SSL_AD_UNEXPECTED_MESSAGE;
2404 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2407 p=d=(unsigned char *)s->init_msg;
2409 if ((sk=sk_X509_new_null()) == NULL)
2411 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2418 al=SSL_AD_DECODE_ERROR;
2419 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2422 for (nc=0; nc<llen; )
2425 if ((l+nc+3) > llen)
2427 al=SSL_AD_DECODE_ERROR;
2428 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2433 x=d2i_X509(NULL,&p,l);
2436 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2441 al=SSL_AD_DECODE_ERROR;
2442 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2445 if (!sk_X509_push(sk,x))
2447 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2454 if (sk_X509_num(sk) <= 0)
2456 /* TLS does not mind 0 certs returned */
2457 if (s->version == SSL3_VERSION)
2459 al=SSL_AD_HANDSHAKE_FAILURE;
2460 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2463 /* Fail for TLS only if we required a certificate */
2464 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2465 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2467 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2468 al=SSL_AD_HANDSHAKE_FAILURE;
2474 i=ssl_verify_cert_chain(s,sk);
2477 al=ssl_verify_alarm_type(s->verify_result);
2478 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2483 if (s->session->peer != NULL) /* This should not be needed */
2484 X509_free(s->session->peer);
2485 s->session->peer=sk_X509_shift(sk);
2486 s->session->verify_result = s->verify_result;
2488 /* With the current implementation, sess_cert will always be NULL
2489 * when we arrive here. */
2490 if (s->session->sess_cert == NULL)
2492 s->session->sess_cert = ssl_sess_cert_new();
2493 if (s->session->sess_cert == NULL)
2495 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2499 if (s->session->sess_cert->cert_chain != NULL)
2500 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2501 s->session->sess_cert->cert_chain=sk;
2502 /* Inconsistency alert: cert_chain does *not* include the
2503 * peer's own certificate, while we do include it in s3_clnt.c */
2511 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2514 if (x != NULL) X509_free(x);
2515 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2519 int ssl3_send_server_certificate(SSL *s)
2524 if (s->state == SSL3_ST_SW_CERT_A)
2526 x=ssl_get_server_send_cert(s);
2528 /* VRS: allow null cert if auth == KRB5 */
2529 (s->s3->tmp.new_cipher->algorithms
2530 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2531 != (SSL_aKRB5|SSL_kKRB5))
2533 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2537 l=ssl3_output_cert_chain(s,x);
2538 s->state=SSL3_ST_SW_CERT_B;
2543 /* SSL3_ST_SW_CERT_B */
2544 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2548 #ifndef OPENSSL_NO_ECDH
2549 /* This is the complement of curve_id2nid in s3_clnt.c. */
2550 static int nid2curve_id(int nid)
2552 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2553 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2555 case NID_sect163k1: /* sect163k1 (1) */
2557 case NID_sect163r1: /* sect163r1 (2) */
2559 case NID_sect163r2: /* sect163r2 (3) */
2561 case NID_sect193r1: /* sect193r1 (4) */
2563 case NID_sect193r2: /* sect193r2 (5) */
2565 case NID_sect233k1: /* sect233k1 (6) */
2567 case NID_sect233r1: /* sect233r1 (7) */
2569 case NID_sect239k1: /* sect239k1 (8) */
2571 case NID_sect283k1: /* sect283k1 (9) */
2573 case NID_sect283r1: /* sect283r1 (10) */
2575 case NID_sect409k1: /* sect409k1 (11) */
2577 case NID_sect409r1: /* sect409r1 (12) */
2579 case NID_sect571k1: /* sect571k1 (13) */
2581 case NID_sect571r1: /* sect571r1 (14) */
2583 case NID_secp160k1: /* secp160k1 (15) */
2585 case NID_secp160r1: /* secp160r1 (16) */
2587 case NID_secp160r2: /* secp160r2 (17) */
2589 case NID_secp192k1: /* secp192k1 (18) */
2591 case NID_X9_62_prime192v1: /* secp192r1 (19) */
2593 case NID_secp224k1: /* secp224k1 (20) */
2595 case NID_secp224r1: /* secp224r1 (21) */
2597 case NID_secp256k1: /* secp256k1 (22) */
2599 case NID_X9_62_prime256v1: /* secp256r1 (23) */
2601 case NID_secp384r1: /* secp384r1 (24) */
2603 case NID_secp521r1: /* secp521r1 (25) */