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) 1998-2001 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).
112 #define REUSE_CIPHER_BUG
113 #define NETSCAPE_HANG_BUG
117 #include <openssl/buffer.h>
118 #include <openssl/rand.h>
119 #include <openssl/objects.h>
120 #include <openssl/evp.h>
121 #include <openssl/x509.h>
122 #include <openssl/krb5_asn.h>
123 #include "ssl_locl.h"
124 #include "kssl_lcl.h"
125 #include <openssl/md5.h>
127 static SSL_METHOD *ssl3_get_server_method(int ver);
128 static int ssl3_get_client_hello(SSL *s);
129 static int ssl3_check_client_hello(SSL *s);
130 static int ssl3_send_server_hello(SSL *s);
131 static int ssl3_send_server_key_exchange(SSL *s);
132 static int ssl3_send_certificate_request(SSL *s);
133 static int ssl3_send_server_done(SSL *s);
134 static int ssl3_get_client_key_exchange(SSL *s);
135 static int ssl3_get_client_certificate(SSL *s);
136 static int ssl3_get_cert_verify(SSL *s);
137 static int ssl3_send_hello_request(SSL *s);
139 static SSL_METHOD *ssl3_get_server_method(int ver)
141 if (ver == SSL3_VERSION)
142 return(SSLv3_server_method());
147 SSL_METHOD *SSLv3_server_method(void)
150 static SSL_METHOD SSLv3_server_data;
154 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
156 SSLv3_server_data.ssl_accept=ssl3_accept;
157 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
160 return(&SSLv3_server_data);
163 int ssl3_accept(SSL *s)
166 unsigned long l,Time=time(NULL);
170 int new_state,state,skip=0;
171 int got_new_session=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;
285 s->state=SSL3_ST_SW_SRVR_HELLO_A;
289 case SSL3_ST_SW_SRVR_HELLO_A:
290 case SSL3_ST_SW_SRVR_HELLO_B:
291 ret=ssl3_send_server_hello(s);
292 if (ret <= 0) goto end;
295 s->state=SSL3_ST_SW_CHANGE_A;
297 s->state=SSL3_ST_SW_CERT_A;
301 case SSL3_ST_SW_CERT_A:
302 case SSL3_ST_SW_CERT_B:
303 /* Check if it is anon DH */
304 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
306 ret=ssl3_send_server_certificate(s);
307 if (ret <= 0) goto end;
311 s->state=SSL3_ST_SW_KEY_EXCH_A;
315 case SSL3_ST_SW_KEY_EXCH_A:
316 case SSL3_ST_SW_KEY_EXCH_B:
317 l=s->s3->tmp.new_cipher->algorithms;
319 /* clear this, it may get reset by
320 * send_server_key_exchange */
321 if ((s->options & SSL_OP_EPHEMERAL_RSA)
322 #ifndef OPENSSL_NO_KRB5
324 #endif /* OPENSSL_NO_KRB5 */
326 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
327 * even when forbidden by protocol specs
328 * (handshake may fail as clients are not required to
329 * be able to handle this) */
330 s->s3->tmp.use_rsa_tmp=1;
332 s->s3->tmp.use_rsa_tmp=0;
334 /* only send if a DH key exchange, fortezza or
335 * RSA but we have a sign only certificate */
336 if (s->s3->tmp.use_rsa_tmp
337 || (l & (SSL_DH|SSL_kFZA))
339 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
340 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
341 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
347 ret=ssl3_send_server_key_exchange(s);
348 if (ret <= 0) goto end;
353 s->state=SSL3_ST_SW_CERT_REQ_A;
357 case SSL3_ST_SW_CERT_REQ_A:
358 case SSL3_ST_SW_CERT_REQ_B:
359 if (/* don't request cert unless asked for it: */
360 !(s->verify_mode & SSL_VERIFY_PEER) ||
361 /* if SSL_VERIFY_CLIENT_ONCE is set,
362 * don't request cert during re-negotiation: */
363 ((s->session->peer != NULL) &&
364 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
365 /* never request cert in anonymous ciphersuites
366 * (see section "Certificate request" in SSL 3 drafts
367 * and in RFC 2246): */
368 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
369 /* ... except when the application insists on verification
370 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
371 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
372 /* never request cert in Kerberos ciphersuites */
373 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
375 /* no cert request */
377 s->s3->tmp.cert_request=0;
378 s->state=SSL3_ST_SW_SRVR_DONE_A;
382 s->s3->tmp.cert_request=1;
383 ret=ssl3_send_certificate_request(s);
384 if (ret <= 0) goto end;
385 #ifndef NETSCAPE_HANG_BUG
386 s->state=SSL3_ST_SW_SRVR_DONE_A;
388 s->state=SSL3_ST_SW_FLUSH;
389 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
395 case SSL3_ST_SW_SRVR_DONE_A:
396 case SSL3_ST_SW_SRVR_DONE_B:
397 ret=ssl3_send_server_done(s);
398 if (ret <= 0) goto end;
399 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
400 s->state=SSL3_ST_SW_FLUSH;
404 case SSL3_ST_SW_FLUSH:
405 /* number of bytes to be flushed */
406 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
409 s->rwstate=SSL_WRITING;
410 num1=BIO_flush(s->wbio);
411 if (num1 <= 0) { ret= -1; goto end; }
412 s->rwstate=SSL_NOTHING;
415 s->state=s->s3->tmp.next_state;
418 case SSL3_ST_SR_CERT_A:
419 case SSL3_ST_SR_CERT_B:
420 /* Check for second client hello (MS SGC) */
421 ret = ssl3_check_client_hello(s);
425 s->state = SSL3_ST_SR_CLNT_HELLO_C;
427 /* could be sent for a DH cert, even if we
428 * have not asked for it :-) */
429 ret=ssl3_get_client_certificate(s);
430 if (ret <= 0) goto end;
432 s->state=SSL3_ST_SR_KEY_EXCH_A;
436 case SSL3_ST_SR_KEY_EXCH_A:
437 case SSL3_ST_SR_KEY_EXCH_B:
438 ret=ssl3_get_client_key_exchange(s);
439 if (ret <= 0) goto end;
440 s->state=SSL3_ST_SR_CERT_VRFY_A;
443 /* We need to get hashes here so if there is
444 * a client cert, it can be verified */
445 s->method->ssl3_enc->cert_verify_mac(s,
446 &(s->s3->finish_dgst1),
447 &(s->s3->tmp.cert_verify_md[0]));
448 s->method->ssl3_enc->cert_verify_mac(s,
449 &(s->s3->finish_dgst2),
450 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
454 case SSL3_ST_SR_CERT_VRFY_A:
455 case SSL3_ST_SR_CERT_VRFY_B:
457 /* we should decide if we expected this one */
458 ret=ssl3_get_cert_verify(s);
459 if (ret <= 0) goto end;
461 s->state=SSL3_ST_SR_FINISHED_A;
465 case SSL3_ST_SR_FINISHED_A:
466 case SSL3_ST_SR_FINISHED_B:
467 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
468 SSL3_ST_SR_FINISHED_B);
469 if (ret <= 0) goto end;
473 s->state=SSL3_ST_SW_CHANGE_A;
477 case SSL3_ST_SW_CHANGE_A:
478 case SSL3_ST_SW_CHANGE_B:
480 s->session->cipher=s->s3->tmp.new_cipher;
481 if (!s->method->ssl3_enc->setup_key_block(s))
482 { ret= -1; goto end; }
484 ret=ssl3_send_change_cipher_spec(s,
485 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
487 if (ret <= 0) goto end;
488 s->state=SSL3_ST_SW_FINISHED_A;
491 if (!s->method->ssl3_enc->change_cipher_state(s,
492 SSL3_CHANGE_CIPHER_SERVER_WRITE))
500 case SSL3_ST_SW_FINISHED_A:
501 case SSL3_ST_SW_FINISHED_B:
502 ret=ssl3_send_finished(s,
503 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
504 s->method->ssl3_enc->server_finished_label,
505 s->method->ssl3_enc->server_finished_label_len);
506 if (ret <= 0) goto end;
507 s->state=SSL3_ST_SW_FLUSH;
509 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
511 s->s3->tmp.next_state=SSL_ST_OK;
516 /* clean a few things up */
517 ssl3_cleanup_key_block(s);
519 BUF_MEM_free(s->init_buf);
522 /* remove buffering on output */
523 ssl_free_wbio_buffer(s);
527 if (got_new_session) /* skipped if we just sent a HelloRequest */
529 /* actually not necessarily a 'new' session unless
530 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
534 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
536 s->ctx->stats.sess_accept_good++;
538 s->handshake_func=ssl3_accept;
540 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
548 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
554 if (!s->s3->tmp.reuse_message && !skip)
558 if ((ret=BIO_flush(s->wbio)) <= 0)
563 if ((cb != NULL) && (s->state != state))
567 cb(s,SSL_CB_ACCEPT_LOOP,1);
574 /* BIO_flush(s->wbio); */
578 cb(s,SSL_CB_ACCEPT_EXIT,ret);
582 static int ssl3_send_hello_request(SSL *s)
586 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
588 p=(unsigned char *)s->init_buf->data;
589 *(p++)=SSL3_MT_HELLO_REQUEST;
594 s->state=SSL3_ST_SW_HELLO_REQ_B;
595 /* number of bytes to write */
600 /* SSL3_ST_SW_HELLO_REQ_B */
601 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
604 static int ssl3_check_client_hello(SSL *s)
609 /* this function is called when we really expect a Certificate message,
610 * so permit appropriate message length */
611 n=ssl3_get_message(s,
617 if (!ok) return((int)n);
618 s->s3->tmp.reuse_message = 1;
619 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
621 /* Throw away what we have done so far in the current handshake,
622 * which will now be aborted. (A full SSL_clear would be too much.)
623 * I hope that tmp.dh is the only thing that may need to be cleared
624 * when a handshake is not completed ... */
625 #ifndef OPENSSL_NO_DH
626 if (s->s3->tmp.dh != NULL)
628 DH_free(s->s3->tmp.dh);
629 s->s3->tmp.dh = NULL;
637 static int ssl3_get_client_hello(SSL *s)
639 int i,j,ok,al,ret= -1;
642 unsigned char *p,*d,*q;
645 STACK_OF(SSL_CIPHER) *ciphers=NULL;
647 /* We do this so that we will respond with our native type.
648 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
649 * This down switching should be handled by a different method.
650 * If we are SSLv3, we will respond with SSLv3, even if prompted with
653 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
656 s->state=SSL3_ST_SR_CLNT_HELLO_B;
658 n=ssl3_get_message(s,
659 SSL3_ST_SR_CLNT_HELLO_B,
660 SSL3_ST_SR_CLNT_HELLO_C,
661 SSL3_MT_CLIENT_HELLO,
662 SSL3_RT_MAX_PLAIN_LENGTH,
665 if (!ok) return((int)n);
666 d=p=(unsigned char *)s->init_msg;
668 /* use version from inside client hello, not from record header
669 * (may differ: see RFC 2246, Appendix E, second paragraph) */
670 s->client_version=(((int)p[0])<<8)|(int)p[1];
673 if (s->client_version < s->version)
675 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
676 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
678 /* similar to ssl3_get_record, send alert using remote version number */
679 s->version = s->client_version;
681 al = SSL_AD_PROTOCOL_VERSION;
685 /* load the client random */
686 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
689 /* get the session-id */
693 /* Versions before 0.9.7 always allow session reuse during renegotiation
694 * (i.e. when s->new_session is true), option
695 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
696 * Maybe this optional behaviour should always have been the default,
697 * but we cannot safely change the default behaviour (or new applications
698 * might be written that become totally unsecure when compiled with
699 * an earlier library version)
701 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
703 if (!ssl_get_new_session(s,1))
708 i=ssl_get_prev_session(s,p,j);
710 { /* previous session */
717 if (!ssl_get_new_session(s,1))
724 if ((i == 0) && (j != 0))
726 /* we need a cipher if we are not resuming a session */
727 al=SSL_AD_ILLEGAL_PARAMETER;
728 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
733 /* not enough data */
734 al=SSL_AD_DECODE_ERROR;
735 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
738 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
745 /* If it is a hit, check that the cipher is in the list */
746 if ((s->hit) && (i > 0))
749 id=s->session->cipher->id;
752 printf("client sent %d ciphers\n",sk_num(ciphers));
754 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
756 c=sk_SSL_CIPHER_value(ciphers,i);
758 printf("client [%2d of %2d]:%s\n",
759 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
769 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
771 /* Very bad for multi-threading.... */
772 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
777 /* we need to have the cipher in the cipher
778 * list if we are asked to reuse it */
779 al=SSL_AD_ILLEGAL_PARAMETER;
780 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
791 if (p[j] == 0) break;
798 al=SSL_AD_DECODE_ERROR;
799 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
803 /* Worst case, we will use the NULL compression, but if we have other
804 * options, we will now look for them. We have i-1 compression
805 * algorithms from the client, starting at q. */
806 s->s3->tmp.new_compression=NULL;
807 if (s->ctx->comp_methods != NULL)
808 { /* See if we have a match */
811 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
814 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
827 s->s3->tmp.new_compression=comp;
832 /* TLS does not mind if there is extra stuff */
833 if (s->version == SSL3_VERSION)
837 /* wrong number of bytes,
838 * there could be more to follow */
839 al=SSL_AD_DECODE_ERROR;
840 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
845 /* Given s->session->ciphers and SSL_get_ciphers, we must
850 s->session->compress_meth=(comp == NULL)?0:comp->id;
851 if (s->session->ciphers != NULL)
852 sk_SSL_CIPHER_free(s->session->ciphers);
853 s->session->ciphers=ciphers;
856 al=SSL_AD_ILLEGAL_PARAMETER;
857 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
861 c=ssl3_choose_cipher(s,s->session->ciphers,
866 al=SSL_AD_HANDSHAKE_FAILURE;
867 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
870 s->s3->tmp.new_cipher=c;
874 /* Session-id reuse */
875 #ifdef REUSE_CIPHER_BUG
876 STACK_OF(SSL_CIPHER) *sk;
880 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
882 sk=s->session->ciphers;
883 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
885 c=sk_SSL_CIPHER_value(sk,i);
886 if (c->algorithms & SSL_eNULL)
888 if (SSL_C_IS_EXPORT(c))
892 s->s3->tmp.new_cipher=nc;
894 s->s3->tmp.new_cipher=ec;
896 s->s3->tmp.new_cipher=s->session->cipher;
900 s->s3->tmp.new_cipher=s->session->cipher;
903 /* we now have the following setup.
905 * cipher_list - our prefered list of ciphers
906 * ciphers - the clients prefered list of ciphers
907 * compression - basically ignored right now
908 * ssl version is set - sslv3
909 * s->session - The ssl session has been setup.
910 * s->hit - session reuse flag
911 * s->tmp.new_cipher - the new cipher to use.
918 ssl3_send_alert(s,SSL3_AL_FATAL,al);
921 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
925 static int ssl3_send_server_hello(SSL *s)
930 unsigned long l,Time;
932 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
934 buf=(unsigned char *)s->init_buf->data;
935 p=s->s3->server_random;
936 Time=time(NULL); /* Time */
938 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
939 /* Do the message type and length last */
942 *(p++)=s->version>>8;
943 *(p++)=s->version&0xff;
946 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
949 /* now in theory we have 3 options to sending back the
950 * session id. If it is a re-use, we send back the
951 * old session-id, if it is a new session, we send
952 * back the new session-id or we send back a 0 length
953 * session-id if we want it to be single use.
954 * Currently I will not implement the '0' length session-id
955 * 12-Jan-98 - I'll now support the '0' length stuff.
957 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
958 s->session->session_id_length=0;
960 sl=s->session->session_id_length;
962 memcpy(p,s->session->session_id,sl);
966 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
969 /* put the compression method */
970 if (s->s3->tmp.new_compression == NULL)
973 *(p++)=s->s3->tmp.new_compression->id;
978 *(d++)=SSL3_MT_SERVER_HELLO;
981 s->state=SSL3_ST_CW_CLNT_HELLO_B;
982 /* number of bytes to write */
987 /* SSL3_ST_CW_CLNT_HELLO_B */
988 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
991 static int ssl3_send_server_done(SSL *s)
995 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
997 p=(unsigned char *)s->init_buf->data;
1000 *(p++)=SSL3_MT_SERVER_DONE;
1005 s->state=SSL3_ST_SW_SRVR_DONE_B;
1006 /* number of bytes to write */
1011 /* SSL3_ST_CW_CLNT_HELLO_B */
1012 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1015 static int ssl3_send_server_key_exchange(SSL *s)
1017 #ifndef OPENSSL_NO_RSA
1021 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1024 #ifndef OPENSSL_NO_DH
1028 unsigned char *p,*d;
1038 EVP_MD_CTX_init(&md_ctx);
1039 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1041 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1046 r[0]=r[1]=r[2]=r[3]=NULL;
1048 #ifndef OPENSSL_NO_RSA
1049 if (type & SSL_kRSA)
1052 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1054 rsa=s->cert->rsa_tmp_cb(s,
1055 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1056 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1059 al=SSL_AD_HANDSHAKE_FAILURE;
1060 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1068 al=SSL_AD_HANDSHAKE_FAILURE;
1069 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1074 s->s3->tmp.use_rsa_tmp=1;
1078 #ifndef OPENSSL_NO_DH
1079 if (type & SSL_kEDH)
1082 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1083 dhp=s->cert->dh_tmp_cb(s,
1084 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1085 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1088 al=SSL_AD_HANDSHAKE_FAILURE;
1089 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1093 if (s->s3->tmp.dh != NULL)
1096 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1100 if ((dh=DHparams_dup(dhp)) == NULL)
1102 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1107 if ((dhp->pub_key == NULL ||
1108 dhp->priv_key == NULL ||
1109 (s->options & SSL_OP_SINGLE_DH_USE)))
1111 if(!DH_generate_key(dh))
1113 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1120 dh->pub_key=BN_dup(dhp->pub_key);
1121 dh->priv_key=BN_dup(dhp->priv_key);
1122 if ((dh->pub_key == NULL) ||
1123 (dh->priv_key == NULL))
1125 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1136 al=SSL_AD_HANDSHAKE_FAILURE;
1137 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1140 for (i=0; r[i] != NULL; i++)
1142 nr[i]=BN_num_bytes(r[i]);
1146 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1148 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1151 al=SSL_AD_DECODE_ERROR;
1154 kn=EVP_PKEY_size(pkey);
1162 if (!BUF_MEM_grow(buf,n+4+kn))
1164 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1167 d=(unsigned char *)s->init_buf->data;
1170 for (i=0; r[i] != NULL; i++)
1180 /* n is the length of the params, they start at &(d[4])
1181 * and p points to the space at the end. */
1182 #ifndef OPENSSL_NO_RSA
1183 if (pkey->type == EVP_PKEY_RSA)
1187 for (num=2; num > 0; num--)
1189 EVP_DigestInit_ex(&md_ctx,(num == 2)
1190 ?s->ctx->md5:s->ctx->sha1, NULL);
1191 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1192 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1193 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1194 EVP_DigestFinal_ex(&md_ctx,q,
1195 (unsigned int *)&i);
1199 if (RSA_sign(NID_md5_sha1, md_buf, j,
1200 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1202 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1210 #if !defined(OPENSSL_NO_DSA)
1211 if (pkey->type == EVP_PKEY_DSA)
1214 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1215 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1216 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1217 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1218 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1219 (unsigned int *)&i,pkey))
1221 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1230 /* Is this error check actually needed? */
1231 al=SSL_AD_HANDSHAKE_FAILURE;
1232 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1237 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1240 /* we should now have things packed up, so lets send
1246 s->state = SSL3_ST_SW_KEY_EXCH_B;
1247 EVP_MD_CTX_cleanup(&md_ctx);
1248 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1250 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1252 EVP_MD_CTX_cleanup(&md_ctx);
1256 static int ssl3_send_certificate_request(SSL *s)
1258 unsigned char *p,*d;
1260 STACK_OF(X509_NAME) *sk=NULL;
1264 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1268 d=p=(unsigned char *)&(buf->data[4]);
1270 /* get the list of acceptable cert types */
1272 n=ssl3_get_req_cert_type(s,p);
1281 sk=SSL_get_client_CA_list(s);
1285 for (i=0; i<sk_X509_NAME_num(sk); i++)
1287 name=sk_X509_NAME_value(sk,i);
1288 j=i2d_X509_NAME(name,NULL);
1289 if (!BUF_MEM_grow(buf,4+n+j+2))
1291 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1294 p=(unsigned char *)&(buf->data[4+n]);
1295 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1298 i2d_X509_NAME(name,&p);
1305 i2d_X509_NAME(name,&p);
1306 j-=2; s2n(j,d); j+=2;
1312 /* else no CA names */
1313 p=(unsigned char *)&(buf->data[4+off]);
1316 d=(unsigned char *)buf->data;
1317 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1320 /* we should now have things packed up, so lets send
1325 #ifdef NETSCAPE_HANG_BUG
1326 p=(unsigned char *)s->init_buf->data + s->init_num;
1329 *(p++)=SSL3_MT_SERVER_DONE;
1338 /* SSL3_ST_SW_CERT_REQ_B */
1339 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1344 static int ssl3_get_client_key_exchange(SSL *s)
1350 #ifndef OPENSSL_NO_RSA
1352 EVP_PKEY *pkey=NULL;
1354 #ifndef OPENSSL_NO_DH
1358 #ifndef OPENSSL_NO_KRB5
1360 #endif /* OPENSSL_NO_KRB5 */
1362 n=ssl3_get_message(s,
1363 SSL3_ST_SR_KEY_EXCH_A,
1364 SSL3_ST_SR_KEY_EXCH_B,
1365 SSL3_MT_CLIENT_KEY_EXCHANGE,
1369 if (!ok) return((int)n);
1370 p=(unsigned char *)s->init_msg;
1372 l=s->s3->tmp.new_cipher->algorithms;
1374 #ifndef OPENSSL_NO_RSA
1377 /* FIX THIS UP EAY EAY EAY EAY */
1378 if (s->s3->tmp.use_rsa_tmp)
1380 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1381 rsa=s->cert->rsa_tmp;
1382 /* Don't do a callback because rsa_tmp should
1383 * be sent already */
1386 al=SSL_AD_HANDSHAKE_FAILURE;
1387 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1394 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1395 if ( (pkey == NULL) ||
1396 (pkey->type != EVP_PKEY_RSA) ||
1397 (pkey->pkey.rsa == NULL))
1399 al=SSL_AD_HANDSHAKE_FAILURE;
1400 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1407 if (s->version > SSL3_VERSION)
1412 if (!(s->options & SSL_OP_TLS_D5_BUG))
1414 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1424 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1428 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1430 al=SSL_AD_DECODE_ERROR;
1431 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1434 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1436 /* The premaster secret must contain the same version number as the
1437 * ClientHello to detect version rollback attacks (strangely, the
1438 * protocol does not offer such protection for DH ciphersuites).
1439 * However, buggy clients exist that send the negotiated protocol
1440 * version instead if the server does not support the requested
1442 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1443 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1444 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1446 al=SSL_AD_DECODE_ERROR;
1447 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1457 /* Some decryption failure -- use random value instead as countermeasure
1458 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1459 * (see RFC 2246, section 7.4.7.1).
1460 * But note that due to length and protocol version checking, the
1461 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1462 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1463 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1466 i = SSL_MAX_MASTER_KEY_LENGTH;
1467 p[0] = s->client_version >> 8;
1468 p[1] = s->client_version & 0xff;
1469 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1473 s->session->master_key_length=
1474 s->method->ssl3_enc->generate_master_secret(s,
1475 s->session->master_key,
1481 #ifndef OPENSSL_NO_DH
1482 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1487 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1489 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1499 if (n == 0L) /* the parameters are in the cert */
1501 al=SSL_AD_HANDSHAKE_FAILURE;
1502 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1507 if (s->s3->tmp.dh == NULL)
1509 al=SSL_AD_HANDSHAKE_FAILURE;
1510 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1514 dh_srvr=s->s3->tmp.dh;
1517 pub=BN_bin2bn(p,i,NULL);
1520 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1524 i=DH_compute_key(p,pub,dh_srvr);
1528 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1532 DH_free(s->s3->tmp.dh);
1537 s->session->master_key_length=
1538 s->method->ssl3_enc->generate_master_secret(s,
1539 s->session->master_key,p,i);
1544 #ifndef OPENSSL_NO_KRB5
1547 krb5_error_code krb5rc;
1548 krb5_data enc_ticket;
1549 krb5_data authenticator;
1551 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1552 EVP_CIPHER_CTX ciph_ctx;
1553 EVP_CIPHER *enc = NULL;
1554 unsigned char iv[EVP_MAX_IV_LENGTH];
1555 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1556 + EVP_MAX_IV_LENGTH + 1];
1557 int padl, outl = sizeof(pms);
1558 krb5_timestamp authtime = 0;
1559 krb5_ticket_times ttimes;
1561 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1564 enc_ticket.length = i;
1565 enc_ticket.data = p;
1566 p+=enc_ticket.length;
1569 authenticator.length = i;
1570 authenticator.data = p;
1571 p+=authenticator.length;
1578 if ((unsigned long)n != enc_ticket.length + authenticator.length +
1581 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1582 SSL_R_DATA_LENGTH_TOO_LONG);
1586 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1590 printf("kssl_sget_tkt rtn %d [%d]\n",
1591 krb5rc, kssl_err.reason);
1593 printf("kssl_err text= %s\n", kssl_err.text);
1594 #endif /* KSSL_DEBUG */
1595 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1600 /* Note: no authenticator is not considered an error,
1601 ** but will return authtime == 0.
1603 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1604 &authtime, &kssl_err)) != 0)
1607 printf("kssl_check_authent rtn %d [%d]\n",
1608 krb5rc, kssl_err.reason);
1610 printf("kssl_err text= %s\n", kssl_err.text);
1611 #endif /* KSSL_DEBUG */
1612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1617 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1619 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
1624 kssl_ctx_show(kssl_ctx);
1625 #endif /* KSSL_DEBUG */
1627 enc = kssl_map_enc(kssl_ctx->enctype);
1631 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1633 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
1635 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1636 SSL_R_DECRYPTION_FAILED);
1639 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1640 enc_pms.data, enc_pms.length))
1642 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1643 SSL_R_DECRYPTION_FAILED);
1646 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1648 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1649 SSL_R_DATA_LENGTH_TOO_LONG);
1652 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
1654 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1655 SSL_R_DECRYPTION_FAILED);
1659 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1661 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1662 SSL_R_DATA_LENGTH_TOO_LONG);
1665 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1667 s->session->master_key_length=
1668 s->method->ssl3_enc->generate_master_secret(s,
1669 s->session->master_key, pms, outl);
1671 if (kssl_ctx->client_princ)
1673 int len = strlen(kssl_ctx->client_princ);
1674 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
1676 s->session->krb5_client_princ_len = len;
1677 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
1682 /* Was doing kssl_ctx_free() here,
1683 ** but it caused problems for apache.
1684 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1685 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1689 #endif /* OPENSSL_NO_KRB5 */
1691 al=SSL_AD_HANDSHAKE_FAILURE;
1692 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1693 SSL_R_UNKNOWN_CIPHER_TYPE);
1699 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1700 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA)
1706 static int ssl3_get_cert_verify(SSL *s)
1708 EVP_PKEY *pkey=NULL;
1715 n=ssl3_get_message(s,
1716 SSL3_ST_SR_CERT_VRFY_A,
1717 SSL3_ST_SR_CERT_VRFY_B,
1722 if (!ok) return((int)n);
1724 if (s->session->peer != NULL)
1726 peer=s->session->peer;
1727 pkey=X509_get_pubkey(peer);
1728 type=X509_certificate_type(peer,pkey);
1736 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1738 s->s3->tmp.reuse_message=1;
1739 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1741 al=SSL_AD_UNEXPECTED_MESSAGE;
1742 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1751 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1752 al=SSL_AD_UNEXPECTED_MESSAGE;
1756 if (!(type & EVP_PKT_SIGN))
1758 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1759 al=SSL_AD_ILLEGAL_PARAMETER;
1763 if (s->s3->change_cipher_spec)
1765 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1766 al=SSL_AD_UNEXPECTED_MESSAGE;
1770 /* we now have a signature that we need to verify */
1771 p=(unsigned char *)s->init_msg;
1776 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1777 al=SSL_AD_DECODE_ERROR;
1781 j=EVP_PKEY_size(pkey);
1782 if ((i > j) || (n > j) || (n <= 0))
1784 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1785 al=SSL_AD_DECODE_ERROR;
1789 #ifndef OPENSSL_NO_RSA
1790 if (pkey->type == EVP_PKEY_RSA)
1792 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1793 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1797 al=SSL_AD_DECRYPT_ERROR;
1798 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1803 al=SSL_AD_DECRYPT_ERROR;
1804 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1810 #ifndef OPENSSL_NO_DSA
1811 if (pkey->type == EVP_PKEY_DSA)
1813 j=DSA_verify(pkey->save_type,
1814 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1815 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1819 al=SSL_AD_DECRYPT_ERROR;
1820 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1827 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
1828 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1837 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1840 EVP_PKEY_free(pkey);
1844 static int ssl3_get_client_certificate(SSL *s)
1846 int i,ok,al,ret= -1;
1848 unsigned long l,nc,llen,n;
1849 unsigned char *p,*d,*q;
1850 STACK_OF(X509) *sk=NULL;
1852 n=ssl3_get_message(s,
1859 if (!ok) return((int)n);
1861 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1863 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1864 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1866 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1867 al=SSL_AD_HANDSHAKE_FAILURE;
1870 /* If tls asked for a client cert, the client must return a 0 list */
1871 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1873 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1874 al=SSL_AD_UNEXPECTED_MESSAGE;
1877 s->s3->tmp.reuse_message=1;
1881 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1883 al=SSL_AD_UNEXPECTED_MESSAGE;
1884 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1887 d=p=(unsigned char *)s->init_msg;
1889 if ((sk=sk_X509_new_null()) == NULL)
1891 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1898 al=SSL_AD_DECODE_ERROR;
1899 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1902 for (nc=0; nc<llen; )
1905 if ((l+nc+3) > llen)
1907 al=SSL_AD_DECODE_ERROR;
1908 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1913 x=d2i_X509(NULL,&p,l);
1916 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1921 al=SSL_AD_DECODE_ERROR;
1922 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1925 if (!sk_X509_push(sk,x))
1927 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1934 if (sk_X509_num(sk) <= 0)
1936 /* TLS does not mind 0 certs returned */
1937 if (s->version == SSL3_VERSION)
1939 al=SSL_AD_HANDSHAKE_FAILURE;
1940 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1943 /* Fail for TLS only if we required a certificate */
1944 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1945 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1947 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1948 al=SSL_AD_HANDSHAKE_FAILURE;
1954 i=ssl_verify_cert_chain(s,sk);
1957 al=ssl_verify_alarm_type(s->verify_result);
1958 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1963 if (s->session->peer != NULL) /* This should not be needed */
1964 X509_free(s->session->peer);
1965 s->session->peer=sk_X509_shift(sk);
1966 s->session->verify_result = s->verify_result;
1968 /* With the current implementation, sess_cert will always be NULL
1969 * when we arrive here. */
1970 if (s->session->sess_cert == NULL)
1972 s->session->sess_cert = ssl_sess_cert_new();
1973 if (s->session->sess_cert == NULL)
1975 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1979 if (s->session->sess_cert->cert_chain != NULL)
1980 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1981 s->session->sess_cert->cert_chain=sk;
1982 /* Inconsistency alert: cert_chain does *not* include the
1983 * peer's own certificate, while we do include it in s3_clnt.c */
1991 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1994 if (x != NULL) X509_free(x);
1995 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1999 int ssl3_send_server_certificate(SSL *s)
2004 if (s->state == SSL3_ST_SW_CERT_A)
2006 x=ssl_get_server_send_cert(s);
2008 /* VRS: allow null cert if auth == KRB5 */
2009 (s->s3->tmp.new_cipher->algorithms
2010 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2011 != (SSL_aKRB5|SSL_kKRB5))
2013 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2017 l=ssl3_output_cert_chain(s,x);
2018 s->state=SSL3_ST_SW_CERT_B;
2023 /* SSL3_ST_SW_CERT_B */
2024 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));