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
))
169 case SSL_ST_BEFORE
| SSL_ST_CONNECT
:
170 case SSL_ST_OK
| SSL_ST_CONNECT
:
172 if (s
->session
!= NULL
) {
173 SSLerr(SSL_F_SSL23_CONNECT
,
174 SSL_R_SSL23_DOING_SESSION_ID_REUSE
);
180 cb(s
, SSL_CB_HANDSHAKE_START
, 1);
182 /* s->version=TLS1_VERSION; */
183 s
->type
= SSL_ST_CONNECT
;
185 if (s
->init_buf
== NULL
) {
186 if ((buf
= BUF_MEM_new()) == NULL
) {
190 if (!BUF_MEM_grow(buf
, SSL3_RT_MAX_PLAIN_LENGTH
)) {
198 if (!ssl3_setup_buffers(s
)) {
203 ssl3_init_finished_mac(s
);
205 s
->state
= SSL23_ST_CW_CLNT_HELLO_A
;
206 s
->ctx
->stats
.sess_connect
++;
210 case SSL23_ST_CW_CLNT_HELLO_A
:
211 case SSL23_ST_CW_CLNT_HELLO_B
:
214 ret
= ssl23_client_hello(s
);
217 s
->state
= SSL23_ST_CR_SRVR_HELLO_A
;
222 case SSL23_ST_CR_SRVR_HELLO_A
:
223 case SSL23_ST_CR_SRVR_HELLO_B
:
224 ret
= ssl23_get_server_hello(s
);
231 SSLerr(SSL_F_SSL23_CONNECT
, SSL_R_UNKNOWN_STATE
);
238 (void)BIO_flush(s
->wbio
);
241 if ((cb
!= NULL
) && (s
->state
!= state
)) {
242 new_state
= s
->state
;
244 cb(s
, SSL_CB_CONNECT_LOOP
, 1);
245 s
->state
= new_state
;
253 cb(s
, SSL_CB_CONNECT_EXIT
, ret
);
258 * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
259 * failure, 1 on success.
261 int ssl_fill_hello_random(SSL
*s
, int server
, unsigned char *result
, int len
)
267 send_time
= (s
->mode
& SSL_MODE_SEND_SERVERHELLO_TIME
) != 0;
269 send_time
= (s
->mode
& SSL_MODE_SEND_CLIENTHELLO_TIME
) != 0;
271 unsigned long Time
= (unsigned long)time(NULL
);
272 unsigned char *p
= result
;
274 return RAND_pseudo_bytes(p
, len
- 4);
276 return RAND_pseudo_bytes(result
, len
);
279 static int ssl23_client_hello(SSL
*s
)
282 unsigned char *p
, *d
;
285 int version
= 0, version_major
, version_minor
;
287 #ifndef OPENSSL_NO_COMP
292 unsigned long mask
, options
= s
->options
;
295 * SSL_OP_NO_X disables all protocols above X *if* there are
296 * some protocols below X enabled. This is required in order
297 * to maintain "version capability" vector contiguous. So
298 * that if application wants to disable TLS1.0 in favour of
299 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
300 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
302 mask
= SSL_OP_NO_TLSv1_1
| SSL_OP_NO_TLSv1
303 #if !defined(OPENSSL_NO_SSL3)
307 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
308 version
= TLS1_2_VERSION
;
310 if ((options
& SSL_OP_NO_TLSv1_2
) && (options
& mask
) != mask
)
311 version
= TLS1_1_VERSION
;
313 version
= TLS1_1_VERSION
;
315 mask
&= ~SSL_OP_NO_TLSv1_1
;
316 if ((options
& SSL_OP_NO_TLSv1_1
) && (options
& mask
) != mask
)
317 version
= TLS1_VERSION
;
318 mask
&= ~SSL_OP_NO_TLSv1
;
319 #if !defined(OPENSSL_NO_SSL3)
320 if ((options
& SSL_OP_NO_TLSv1
) && (options
& mask
) != mask
)
321 version
= SSL3_VERSION
;
322 mask
&= ~SSL_OP_NO_SSLv3
;
325 buf
= (unsigned char *)s
->init_buf
->data
;
326 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
) {
328 /* don't reuse session-id's */
329 if (!ssl_get_new_session(s
, 0)) {
334 p
= s
->s3
->client_random
;
335 if (ssl_fill_hello_random(s
, 0, p
, SSL3_RANDOM_SIZE
) <= 0)
338 if (version
== TLS1_2_VERSION
) {
339 version_major
= TLS1_2_VERSION_MAJOR
;
340 version_minor
= TLS1_2_VERSION_MINOR
;
341 } else if (tls1_suiteb(s
)) {
342 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
343 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE
);
345 } else if (version
== TLS1_1_VERSION
) {
346 version_major
= TLS1_1_VERSION_MAJOR
;
347 version_minor
= TLS1_1_VERSION_MINOR
;
348 } else if (version
== TLS1_VERSION
) {
349 version_major
= TLS1_VERSION_MAJOR
;
350 version_minor
= TLS1_VERSION_MINOR
;
351 } else if (FIPS_mode()) {
352 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
353 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
355 } else if (version
== SSL3_VERSION
) {
356 version_major
= SSL3_VERSION_MAJOR
;
357 version_minor
= SSL3_VERSION_MINOR
;
359 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_PROTOCOLS_AVAILABLE
);
363 s
->client_version
= version
;
365 /* create Client Hello in SSL 3.0/TLS 1.0 format */
368 * do the record header (5 bytes) and handshake message header (4
373 *(p
++) = version_major
;
374 *(p
++) = version_minor
;
377 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
378 p
+= SSL3_RANDOM_SIZE
;
380 /* Session ID (zero since there is no reuse) */
383 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
384 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), &(p
[2]),
385 ssl3_put_cipher_by_char
);
387 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
390 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
392 * Some servers hang if client hello > 256 bytes as hack workaround
393 * chop number of supported ciphers to keep it well below this if we
396 if (TLS1_get_version(s
) >= TLS1_2_VERSION
397 && i
> OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
)
398 i
= OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
& ~1;
404 #ifdef OPENSSL_NO_COMP
407 if (!ssl_allow_compression(s
) || !s
->ctx
->comp_methods
)
410 j
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
412 for (i
= 0; i
< j
; i
++) {
413 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
417 *(p
++) = 0; /* Add the NULL method */
419 #ifndef OPENSSL_NO_TLSEXT
421 if (ssl_prepare_clienthello_tlsext(s
) <= 0) {
422 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_CLIENTHELLO_TLSEXT
);
426 ssl_add_clienthello_tlsext(s
, p
, buf
+ SSL3_RT_MAX_PLAIN_LENGTH
,
428 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
429 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
436 /* fill in 4-byte handshake header */
438 *(d
++) = SSL3_MT_CLIENT_HELLO
;
443 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
) {
444 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
448 /* fill in 5-byte record header */
450 *(d
++) = SSL3_RT_HANDSHAKE
;
451 *(d
++) = version_major
;
453 * Some servers hang if we use long client hellos and a record number
456 if (TLS1_get_client_version(s
) > TLS1_VERSION
)
459 *(d
++) = version_minor
;
462 /* number of bytes to write */
463 s
->init_num
= p
- buf
;
466 ssl3_finish_mac(s
, &(buf
[5]), s
->init_num
- 5);
468 s
->state
= SSL23_ST_CW_CLNT_HELLO_B
;
472 /* SSL3_ST_CW_CLNT_HELLO_B */
473 ret
= ssl23_write_bytes(s
);
475 if ((ret
>= 2) && s
->msg_callback
) {
476 /* Client Hello has been sent; tell msg_callback */
477 s
->msg_callback(1, version
, SSL3_RT_HEADER
, s
->init_buf
->data
, 5, s
,
478 s
->msg_callback_arg
);
479 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
, s
->init_buf
->data
+ 5,
480 ret
- 5, s
, s
->msg_callback_arg
);
486 static int ssl23_get_server_hello(SSL
*s
)
493 n
= ssl23_read_bytes(s
, 7);
501 if (p
[1] == SSL3_VERSION_MAJOR
&&
502 p
[2] <= TLS1_2_VERSION_MINOR
&&
503 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
504 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2))) {
505 /* we have sslv3 or tls1 (server hello or alert) */
507 #ifndef OPENSSL_NO_SSL3
508 if ((p
[2] == SSL3_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_SSLv3
)) {
510 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,
511 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
514 s
->version
= SSL3_VERSION
;
515 s
->method
= SSLv3_client_method();
518 if ((p
[2] == TLS1_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_TLSv1
)) {
519 s
->version
= TLS1_VERSION
;
520 s
->method
= TLSv1_client_method();
521 } else if ((p
[2] == TLS1_1_VERSION_MINOR
) &&
522 !(s
->options
& SSL_OP_NO_TLSv1_1
)) {
523 s
->version
= TLS1_1_VERSION
;
524 s
->method
= TLSv1_1_client_method();
525 } else if ((p
[2] == TLS1_2_VERSION_MINOR
) &&
526 !(s
->options
& SSL_OP_NO_TLSv1_2
)) {
527 s
->version
= TLS1_2_VERSION
;
528 s
->method
= TLSv1_2_client_method();
530 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
534 /* ensure that TLS_MAX_VERSION is up-to-date */
535 OPENSSL_assert(s
->version
<= TLS_MAX_VERSION
);
537 if (!ssl_security(s
, SSL_SECOP_VERSION
, 0, s
->version
, NULL
)) {
538 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_VERSION_TOO_LOW
);
542 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
) {
545 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
548 if (s
->info_callback
!= NULL
)
549 cb
= s
->info_callback
;
550 else if (s
->ctx
->info_callback
!= NULL
)
551 cb
= s
->ctx
->info_callback
;
556 cb(s
, SSL_CB_READ_ALERT
, j
);
559 if (s
->msg_callback
) {
560 s
->msg_callback(0, s
->version
, SSL3_RT_HEADER
, p
, 5, s
,
561 s
->msg_callback_arg
);
562 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+ 5, 2, s
,
563 s
->msg_callback_arg
);
566 s
->rwstate
= SSL_NOTHING
;
567 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_AD_REASON_OFFSET
+ p
[6]);
571 if (!ssl_init_wbio_buffer(s
, 1))
574 /* we are in this state */
575 s
->state
= SSL3_ST_CR_SRVR_HELLO_A
;
578 * put the 7 bytes we have read into the input buffer for SSLv3
580 s
->rstate
= SSL_ST_READ_HEADER
;
581 s
->packet_length
= n
;
582 if (s
->s3
->rbuf
.buf
== NULL
)
583 if (!ssl3_setup_read_buffer(s
))
585 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
586 memcpy(s
->packet
, buf
, n
);
587 s
->s3
->rbuf
.left
= n
;
588 s
->s3
->rbuf
.offset
= 0;
590 s
->handshake_func
= s
->method
->ssl_connect
;
592 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNKNOWN_PROTOCOL
);
598 * Since, if we are sending a ssl23 client hello, we are not reusing a
601 if (!ssl_get_new_session(s
, 0))
604 return (SSL_connect(s
));