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.]
61 #include <openssl/buffer.h>
62 #include <openssl/rand.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
66 static SSL_METHOD
*ssl23_get_client_method(int ver
);
67 static int ssl23_client_hello(SSL
*s
);
68 static int ssl23_get_server_hello(SSL
*s
);
69 static SSL_METHOD
*ssl23_get_client_method(int ver
)
71 #ifndef OPENSSL_NO_SSL2
72 if (ver
== SSL2_VERSION
)
73 return (SSLv2_client_method());
75 #ifndef OPENSSL_NO_SSL3
76 if (ver
== SSL3_VERSION
)
77 return (SSLv3_client_method());
79 if (ver
== TLS1_VERSION
)
80 return (TLSv1_client_method());
85 IMPLEMENT_ssl23_meth_func(SSLv23_client_method
,
86 ssl_undefined_function
,
87 ssl23_connect
, ssl23_get_client_method
)
89 int ssl23_connect(SSL
*s
)
92 unsigned long Time
= (unsigned long)time(NULL
);
93 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
97 RAND_add(&Time
, sizeof(Time
), 0);
101 if (s
->info_callback
!= NULL
)
102 cb
= s
->info_callback
;
103 else if (s
->ctx
->info_callback
!= NULL
)
104 cb
= s
->ctx
->info_callback
;
107 if (!SSL_in_init(s
) || SSL_in_before(s
))
116 case SSL_ST_BEFORE
| SSL_ST_CONNECT
:
117 case SSL_ST_OK
| SSL_ST_CONNECT
:
119 if (s
->session
!= NULL
) {
120 SSLerr(SSL_F_SSL23_CONNECT
,
121 SSL_R_SSL23_DOING_SESSION_ID_REUSE
);
127 cb(s
, SSL_CB_HANDSHAKE_START
, 1);
129 /* s->version=TLS1_VERSION; */
130 s
->type
= SSL_ST_CONNECT
;
132 if (s
->init_buf
== NULL
) {
133 if ((buf
= BUF_MEM_new()) == NULL
) {
137 if (!BUF_MEM_grow(buf
, SSL3_RT_MAX_PLAIN_LENGTH
)) {
145 if (!ssl3_setup_buffers(s
)) {
150 ssl3_init_finished_mac(s
);
152 s
->state
= SSL23_ST_CW_CLNT_HELLO_A
;
153 s
->ctx
->stats
.sess_connect
++;
157 case SSL23_ST_CW_CLNT_HELLO_A
:
158 case SSL23_ST_CW_CLNT_HELLO_B
:
161 ret
= ssl23_client_hello(s
);
164 s
->state
= SSL23_ST_CR_SRVR_HELLO_A
;
169 case SSL23_ST_CR_SRVR_HELLO_A
:
170 case SSL23_ST_CR_SRVR_HELLO_B
:
171 ret
= ssl23_get_server_hello(s
);
178 SSLerr(SSL_F_SSL23_CONNECT
, SSL_R_UNKNOWN_STATE
);
185 (void)BIO_flush(s
->wbio
);
188 if ((cb
!= NULL
) && (s
->state
!= state
)) {
189 new_state
= s
->state
;
191 cb(s
, SSL_CB_CONNECT_LOOP
, 1);
192 s
->state
= new_state
;
200 cb(s
, SSL_CB_CONNECT_EXIT
, ret
);
204 static int ssl23_client_hello(SSL
*s
)
207 unsigned char *p
, *d
;
209 unsigned long Time
, l
;
211 int version
= 0, version_major
, version_minor
;
212 #ifndef OPENSSL_NO_COMP
218 ssl2_compat
= (s
->options
& SSL_OP_NO_SSLv2
) ? 0 : 1;
220 if (!(s
->options
& SSL_OP_NO_TLSv1
)) {
221 version
= TLS1_VERSION
;
222 } else if (!(s
->options
& SSL_OP_NO_SSLv3
)) {
223 version
= SSL3_VERSION
;
224 } else if (!(s
->options
& SSL_OP_NO_SSLv2
)) {
225 version
= SSL2_VERSION
;
227 #ifndef OPENSSL_NO_TLSEXT
228 if (version
!= SSL2_VERSION
) {
230 * have to disable SSL 2.0 compatibility if we need TLS extensions
233 if (s
->tlsext_hostname
!= NULL
)
235 if (s
->tlsext_status_type
!= -1)
240 buf
= (unsigned char *)s
->init_buf
->data
;
241 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
) {
243 /* don't reuse session-id's */
244 if (!ssl_get_new_session(s
, 0)) {
249 p
= s
->s3
->client_random
;
250 Time
= (unsigned long)time(NULL
); /* Time */
252 if (RAND_pseudo_bytes(p
, SSL3_RANDOM_SIZE
- 4) <= 0)
255 if (version
== TLS1_VERSION
) {
256 version_major
= TLS1_VERSION_MAJOR
;
257 version_minor
= TLS1_VERSION_MINOR
;
260 else if (FIPS_mode()) {
261 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
262 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
266 else if (version
== SSL3_VERSION
) {
267 version_major
= SSL3_VERSION_MAJOR
;
268 version_minor
= SSL3_VERSION_MINOR
;
269 } else if (version
== SSL2_VERSION
) {
270 version_major
= SSL2_VERSION_MAJOR
;
271 version_minor
= SSL2_VERSION_MINOR
;
273 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_PROTOCOLS_AVAILABLE
);
277 s
->client_version
= version
;
280 /* create SSL 2.0 compatible Client Hello */
282 /* two byte record header will be written last */
284 p
= d
+ 9; /* leave space for message type, version,
285 * individual length fields */
287 *(d
++) = SSL2_MT_CLIENT_HELLO
;
288 *(d
++) = version_major
;
289 *(d
++) = version_minor
;
291 /* Ciphers supported */
292 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), p
, 0);
295 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
302 * put in the session-id length (zero since there is no reuse)
305 s
->session
->session_id_length
= 0;
309 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
310 ch_len
= SSL2_CHALLENGE_LENGTH
;
312 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
314 /* write out sslv2 challenge */
315 if (SSL3_RANDOM_SIZE
< ch_len
)
316 i
= SSL3_RANDOM_SIZE
;
320 memset(&(s
->s3
->client_random
[0]), 0, SSL3_RANDOM_SIZE
);
321 if (RAND_pseudo_bytes
322 (&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
) <= 0)
325 memcpy(p
, &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
329 buf
[0] = ((i
>> 8) & 0xff) | 0x80;
332 /* number of bytes to write */
336 ssl3_finish_mac(s
, &(buf
[2]), i
);
338 /* create Client Hello in SSL 3.0/TLS 1.0 format */
341 * do the record header (5 bytes) and handshake message header (4
346 *(p
++) = version_major
;
347 *(p
++) = version_minor
;
350 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
351 p
+= SSL3_RANDOM_SIZE
;
353 /* Session ID (zero since there is no reuse) */
356 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
357 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), &(p
[2]),
358 ssl3_put_cipher_by_char
);
360 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
365 #ifdef OPENSSL_NO_COMP
369 if (s
->ctx
->comp_methods
== NULL
)
372 j
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
374 for (i
= 0; i
< j
; i
++) {
375 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
379 *(p
++) = 0; /* Add the NULL method */
380 #ifndef OPENSSL_NO_TLSEXT
382 ssl_add_clienthello_tlsext(s
, p
,
384 SSL3_RT_MAX_PLAIN_LENGTH
)) ==
386 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
394 /* fill in 4-byte handshake header */
396 *(d
++) = SSL3_MT_CLIENT_HELLO
;
401 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
) {
402 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
406 /* fill in 5-byte record header */
408 *(d
++) = SSL3_RT_HANDSHAKE
;
409 *(d
++) = version_major
;
410 *(d
++) = version_minor
; /* arguably we should send the *lowest*
411 * suported version here (indicating,
412 * e.g., TLS 1.0 in "SSL 3.0 format") */
415 /* number of bytes to write */
416 s
->init_num
= p
- buf
;
419 ssl3_finish_mac(s
, &(buf
[5]), s
->init_num
- 5);
422 s
->state
= SSL23_ST_CW_CLNT_HELLO_B
;
426 /* SSL3_ST_CW_CLNT_HELLO_B */
427 ret
= ssl23_write_bytes(s
);
429 if ((ret
>= 2) && s
->msg_callback
) {
430 /* Client Hello has been sent; tell msg_callback */
433 s
->msg_callback(1, SSL2_VERSION
, 0, s
->init_buf
->data
+ 2,
434 ret
- 2, s
, s
->msg_callback_arg
);
436 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
,
437 s
->init_buf
->data
+ 5, ret
- 5, s
,
438 s
->msg_callback_arg
);
444 static int ssl23_get_server_hello(SSL
*s
)
451 n
= ssl23_read_bytes(s
, 7);
459 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_SERVER_HELLO
) &&
460 (p
[5] == 0x00) && (p
[6] == 0x02)) {
461 #ifdef OPENSSL_NO_SSL2
462 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
465 /* we are talking sslv2 */
467 * we need to clean up the SSLv3 setup and put in the sslv2 stuff.
471 if (s
->options
& SSL_OP_NO_SSLv2
) {
472 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
481 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
482 ch_len
= SSL2_CHALLENGE_LENGTH
;
484 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
486 /* write out sslv2 challenge */
487 i
= (SSL3_RANDOM_SIZE
< ch_len
)
488 ? SSL3_RANDOM_SIZE
: ch_len
;
489 s
->s2
->challenge_length
= i
;
490 memcpy(s
->s2
->challenge
,
491 &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
496 if (!BUF_MEM_grow_clean(s
->init_buf
,
497 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)) {
498 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, ERR_R_BUF_LIB
);
502 s
->state
= SSL2_ST_GET_SERVER_HELLO_A
;
503 if (!(s
->client_version
== SSL2_VERSION
))
505 * use special padding (SSL 3.0 draft/RFC 2246, App. E.2)
507 s
->s2
->ssl2_rollback
= 1;
510 * setup the 7 bytes we have read so we get them from the sslv2
513 s
->rstate
= SSL_ST_READ_HEADER
;
514 s
->packet_length
= n
;
515 s
->packet
= &(s
->s2
->rbuf
[0]);
516 memcpy(s
->packet
, buf
, n
);
517 s
->s2
->rbuf_left
= n
;
518 s
->s2
->rbuf_offs
= 0;
520 /* we have already written one */
521 s
->s2
->write_sequence
= 1;
523 s
->method
= SSLv2_client_method();
524 s
->handshake_func
= s
->method
->ssl_connect
;
526 } else if (p
[1] == SSL3_VERSION_MAJOR
&&
527 ((p
[2] == SSL3_VERSION_MINOR
) ||
528 (p
[2] == TLS1_VERSION_MINOR
)) &&
529 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
530 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2))) {
531 /* we have sslv3 or tls1 (server hello or alert) */
533 #ifndef OPENSSL_NO_SSL3
534 if ((p
[2] == SSL3_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_SSLv3
)) {
537 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,
538 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
542 s
->version
= SSL3_VERSION
;
543 s
->method
= SSLv3_client_method();
546 if ((p
[2] == TLS1_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_TLSv1
)) {
547 s
->version
= TLS1_VERSION
;
548 s
->method
= TLSv1_client_method();
550 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
554 /* ensure that TLS_MAX_VERSION is up-to-date */
555 OPENSSL_assert(s
->version
<= TLS_MAX_VERSION
);
557 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
) {
560 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
563 if (s
->info_callback
!= NULL
)
564 cb
= s
->info_callback
;
565 else if (s
->ctx
->info_callback
!= NULL
)
566 cb
= s
->ctx
->info_callback
;
571 cb(s
, SSL_CB_READ_ALERT
, j
);
575 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+ 5, 2, s
,
576 s
->msg_callback_arg
);
578 s
->rwstate
= SSL_NOTHING
;
579 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_AD_REASON_OFFSET
+ p
[6]);
583 if (!ssl_init_wbio_buffer(s
, 1))
586 /* we are in this state */
587 s
->state
= SSL3_ST_CR_SRVR_HELLO_A
;
590 * put the 7 bytes we have read into the input buffer for SSLv3
592 s
->rstate
= SSL_ST_READ_HEADER
;
593 s
->packet_length
= n
;
594 if (s
->s3
->rbuf
.buf
== NULL
)
595 if (!ssl3_setup_buffers(s
))
597 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
598 memcpy(s
->packet
, buf
, n
);
599 s
->s3
->rbuf
.left
= n
;
600 s
->s3
->rbuf
.offset
= 0;
602 s
->handshake_func
= s
->method
->ssl_connect
;
604 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNKNOWN_PROTOCOL
);
610 * Since, if we are sending a ssl23 client hello, we are not reusing a
613 if (!ssl_get_new_session(s
, 0))
616 return (SSL_connect(s
));