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).
113 #include "ssl_locl.h"
114 #include <openssl/buffer.h>
115 #include <openssl/rand.h>
116 #include <openssl/objects.h>
117 #include <openssl/evp.h>
119 static const SSL_METHOD
*ssl23_get_client_method(int ver
);
120 static int ssl23_client_hello(SSL
*s
);
121 static int ssl23_get_server_hello(SSL
*s
);
122 static const SSL_METHOD
*ssl23_get_client_method(int ver
)
124 #ifndef OPENSSL_NO_SSL3
125 if (ver
== SSL3_VERSION
)
126 return (SSLv3_client_method());
128 if (ver
== TLS1_VERSION
)
129 return (TLSv1_client_method());
130 else if (ver
== TLS1_1_VERSION
)
131 return (TLSv1_1_client_method());
132 else if (ver
== TLS1_2_VERSION
)
133 return (TLSv1_2_client_method());
138 IMPLEMENT_ssl23_meth_func(SSLv23_client_method
,
139 ssl_undefined_function
,
140 ssl23_connect
, ssl23_get_client_method
)
142 int ssl23_connect(SSL
*s
)
145 unsigned long Time
= (unsigned long)time(NULL
);
146 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
148 int new_state
, state
;
150 RAND_add(&Time
, sizeof(Time
), 0);
154 if (s
->info_callback
!= NULL
)
155 cb
= s
->info_callback
;
156 else if (s
->ctx
->info_callback
!= NULL
)
157 cb
= s
->ctx
->info_callback
;
160 if (!SSL_in_init(s
) || SSL_in_before(s
)) {
171 case SSL_ST_BEFORE
| SSL_ST_CONNECT
:
172 case SSL_ST_OK
| SSL_ST_CONNECT
:
174 if (s
->session
!= NULL
) {
175 SSLerr(SSL_F_SSL23_CONNECT
,
176 SSL_R_SSL23_DOING_SESSION_ID_REUSE
);
182 cb(s
, SSL_CB_HANDSHAKE_START
, 1);
184 /* s->version=TLS1_VERSION; */
185 s
->type
= SSL_ST_CONNECT
;
187 if (s
->init_buf
== NULL
) {
188 if ((buf
= BUF_MEM_new()) == NULL
) {
192 if (!BUF_MEM_grow(buf
, SSL3_RT_MAX_PLAIN_LENGTH
)) {
200 if (!ssl3_setup_buffers(s
)) {
205 ssl3_init_finished_mac(s
);
207 s
->state
= SSL23_ST_CW_CLNT_HELLO_A
;
208 s
->ctx
->stats
.sess_connect
++;
212 case SSL23_ST_CW_CLNT_HELLO_A
:
213 case SSL23_ST_CW_CLNT_HELLO_B
:
216 ret
= ssl23_client_hello(s
);
219 s
->state
= SSL23_ST_CR_SRVR_HELLO_A
;
224 case SSL23_ST_CR_SRVR_HELLO_A
:
225 case SSL23_ST_CR_SRVR_HELLO_B
:
226 ret
= ssl23_get_server_hello(s
);
233 SSLerr(SSL_F_SSL23_CONNECT
, SSL_R_UNKNOWN_STATE
);
240 (void)BIO_flush(s
->wbio
);
243 if ((cb
!= NULL
) && (s
->state
!= state
)) {
244 new_state
= s
->state
;
246 cb(s
, SSL_CB_CONNECT_LOOP
, 1);
247 s
->state
= new_state
;
255 cb(s
, SSL_CB_CONNECT_EXIT
, ret
);
260 * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
261 * failure, 1 on success.
263 int ssl_fill_hello_random(SSL
*s
, int server
, unsigned char *result
, int len
)
270 send_time
= (s
->mode
& SSL_MODE_SEND_SERVERHELLO_TIME
) != 0;
272 send_time
= (s
->mode
& SSL_MODE_SEND_CLIENTHELLO_TIME
) != 0;
274 unsigned long Time
= (unsigned long)time(NULL
);
275 unsigned char *p
= result
;
277 return RAND_bytes(p
, len
- 4);
279 return RAND_bytes(result
, len
);
282 static int ssl23_client_hello(SSL
*s
)
285 unsigned char *p
, *d
;
288 int version
= 0, version_major
, version_minor
;
290 #ifndef OPENSSL_NO_COMP
295 unsigned long mask
, options
= s
->options
;
298 * SSL_OP_NO_X disables all protocols above X *if* there are
299 * some protocols below X enabled. This is required in order
300 * to maintain "version capability" vector contiguous. So
301 * that if application wants to disable TLS1.0 in favour of
302 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
303 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
305 mask
= SSL_OP_NO_TLSv1_1
| SSL_OP_NO_TLSv1
306 #if !defined(OPENSSL_NO_SSL3)
310 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
311 version
= TLS1_2_VERSION
;
313 if ((options
& SSL_OP_NO_TLSv1_2
) && (options
& mask
) != mask
)
314 version
= TLS1_1_VERSION
;
316 version
= TLS1_1_VERSION
;
318 mask
&= ~SSL_OP_NO_TLSv1_1
;
319 if ((options
& SSL_OP_NO_TLSv1_1
) && (options
& mask
) != mask
)
320 version
= TLS1_VERSION
;
321 mask
&= ~SSL_OP_NO_TLSv1
;
322 #if !defined(OPENSSL_NO_SSL3)
323 if ((options
& SSL_OP_NO_TLSv1
) && (options
& mask
) != mask
)
324 version
= SSL3_VERSION
;
325 mask
&= ~SSL_OP_NO_SSLv3
;
328 buf
= (unsigned char *)s
->init_buf
->data
;
329 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
) {
330 p
= s
->s3
->client_random
;
331 if (ssl_fill_hello_random(s
, 0, p
, SSL3_RANDOM_SIZE
) <= 0)
334 if (version
== TLS1_2_VERSION
) {
335 version_major
= TLS1_2_VERSION_MAJOR
;
336 version_minor
= TLS1_2_VERSION_MINOR
;
337 } else if (tls1_suiteb(s
)) {
338 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
339 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE
);
341 } else if (version
== TLS1_1_VERSION
) {
342 version_major
= TLS1_1_VERSION_MAJOR
;
343 version_minor
= TLS1_1_VERSION_MINOR
;
344 } else if (version
== TLS1_VERSION
) {
345 version_major
= TLS1_VERSION_MAJOR
;
346 version_minor
= TLS1_VERSION_MINOR
;
347 } else if (FIPS_mode()) {
348 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
349 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
351 } else if (version
== SSL3_VERSION
) {
352 version_major
= SSL3_VERSION_MAJOR
;
353 version_minor
= SSL3_VERSION_MINOR
;
355 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_PROTOCOLS_AVAILABLE
);
359 s
->client_version
= version
;
361 /* create Client Hello in SSL 3.0/TLS 1.0 format */
364 * do the record header (5 bytes) and handshake message header (4
369 *(p
++) = version_major
;
370 *(p
++) = version_minor
;
373 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
374 p
+= SSL3_RANDOM_SIZE
;
376 /* Session ID (zero since there is no reuse) */
379 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
380 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), &(p
[2]),
381 ssl3_put_cipher_by_char
);
383 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
386 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
388 * Some servers hang if client hello > 256 bytes as hack workaround
389 * chop number of supported ciphers to keep it well below this if we
392 if (TLS1_get_version(s
) >= TLS1_2_VERSION
393 && i
> OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
)
394 i
= OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
& ~1;
400 #ifdef OPENSSL_NO_COMP
403 if (!ssl_allow_compression(s
) || !s
->ctx
->comp_methods
)
406 j
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
408 for (i
= 0; i
< j
; i
++) {
409 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
413 *(p
++) = 0; /* Add the NULL method */
415 #ifndef OPENSSL_NO_TLSEXT
417 if (ssl_prepare_clienthello_tlsext(s
) <= 0) {
418 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_CLIENTHELLO_TLSEXT
);
422 ssl_add_clienthello_tlsext(s
, p
, buf
+ SSL3_RT_MAX_PLAIN_LENGTH
,
424 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
425 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
432 /* fill in 4-byte handshake header */
434 *(d
++) = SSL3_MT_CLIENT_HELLO
;
439 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
) {
440 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
444 /* fill in 5-byte record header */
446 *(d
++) = SSL3_RT_HANDSHAKE
;
447 *(d
++) = version_major
;
449 * Some servers hang if we use long client hellos and a record number
452 if (TLS1_get_client_version(s
) > TLS1_VERSION
)
455 *(d
++) = version_minor
;
458 /* number of bytes to write */
459 s
->init_num
= p
- buf
;
462 ssl3_finish_mac(s
, &(buf
[5]), s
->init_num
- 5);
464 s
->state
= SSL23_ST_CW_CLNT_HELLO_B
;
468 /* SSL3_ST_CW_CLNT_HELLO_B */
469 ret
= ssl23_write_bytes(s
);
471 if ((ret
>= 2) && s
->msg_callback
) {
472 /* Client Hello has been sent; tell msg_callback */
473 s
->msg_callback(1, version
, SSL3_RT_HEADER
, s
->init_buf
->data
, 5, s
,
474 s
->msg_callback_arg
);
475 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
, s
->init_buf
->data
+ 5,
476 ret
- 5, s
, s
->msg_callback_arg
);
482 static int ssl23_get_server_hello(SSL
*s
)
489 n
= ssl23_read_bytes(s
, 7);
497 if (p
[1] == SSL3_VERSION_MAJOR
&&
498 p
[2] <= TLS1_2_VERSION_MINOR
&&
499 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
500 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2))) {
501 /* we have sslv3 or tls1 (server hello or alert) */
503 #ifndef OPENSSL_NO_SSL3
504 if ((p
[2] == SSL3_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_SSLv3
)) {
506 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,
507 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
510 s
->version
= SSL3_VERSION
;
511 s
->method
= SSLv3_client_method();
514 if ((p
[2] == TLS1_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_TLSv1
)) {
515 s
->version
= TLS1_VERSION
;
516 s
->method
= TLSv1_client_method();
517 } else if ((p
[2] == TLS1_1_VERSION_MINOR
) &&
518 !(s
->options
& SSL_OP_NO_TLSv1_1
)) {
519 s
->version
= TLS1_1_VERSION
;
520 s
->method
= TLSv1_1_client_method();
521 } else if ((p
[2] == TLS1_2_VERSION_MINOR
) &&
522 !(s
->options
& SSL_OP_NO_TLSv1_2
)) {
523 s
->version
= TLS1_2_VERSION
;
524 s
->method
= TLSv1_2_client_method();
526 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
530 /* ensure that TLS_MAX_VERSION is up-to-date */
531 OPENSSL_assert(s
->version
<= TLS_MAX_VERSION
);
533 if (!ssl_security(s
, SSL_SECOP_VERSION
, 0, s
->version
, NULL
)) {
534 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_VERSION_TOO_LOW
);
538 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
) {
541 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
544 if (s
->info_callback
!= NULL
)
545 cb
= s
->info_callback
;
546 else if (s
->ctx
->info_callback
!= NULL
)
547 cb
= s
->ctx
->info_callback
;
552 cb(s
, SSL_CB_READ_ALERT
, j
);
555 if (s
->msg_callback
) {
556 s
->msg_callback(0, s
->version
, SSL3_RT_HEADER
, p
, 5, s
,
557 s
->msg_callback_arg
);
558 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+ 5, 2, s
,
559 s
->msg_callback_arg
);
562 s
->rwstate
= SSL_NOTHING
;
563 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_AD_REASON_OFFSET
+ p
[6]);
567 if (!ssl_init_wbio_buffer(s
, 1))
570 /* we are in this state */
571 s
->state
= SSL3_ST_CR_SRVR_HELLO_A
;
574 * put the 7 bytes we have read into the input buffer for SSLv3
576 s
->rstate
= SSL_ST_READ_HEADER
;
577 s
->packet_length
= n
;
578 if (s
->s3
->rbuf
.buf
== NULL
)
579 if (!ssl3_setup_read_buffer(s
))
581 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
582 memcpy(s
->packet
, buf
, n
);
583 s
->s3
->rbuf
.left
= n
;
584 s
->s3
->rbuf
.offset
= 0;
586 s
->handshake_func
= s
->method
->ssl_connect
;
588 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNKNOWN_PROTOCOL
);
594 * Since, if we are sending a ssl23 client hello, we are not reusing a
597 if (!ssl_get_new_session(s
, 0))
600 return (SSL_connect(s
));