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_SSL2
125 if (ver
== SSL2_VERSION
)
126 return(SSLv2_client_method());
128 if (ver
== SSL3_VERSION
)
129 return(SSLv3_client_method());
130 else if (ver
== TLS1_VERSION
)
131 return(TLSv1_client_method());
136 IMPLEMENT_ssl23_meth_func(SSLv23_client_method
,
137 ssl_undefined_function
,
139 ssl23_get_client_method
)
141 int ssl23_connect(SSL
*s
)
144 unsigned long Time
=(unsigned long)time(NULL
);
145 void (*cb
)(const SSL
*ssl
,int type
,int val
)=NULL
;
149 RAND_add(&Time
,sizeof(Time
),0);
153 if (s
->info_callback
!= NULL
)
155 else if (s
->ctx
->info_callback
!= NULL
)
156 cb
=s
->ctx
->info_callback
;
159 if (!SSL_in_init(s
) || SSL_in_before(s
)) SSL_clear(s
);
169 case SSL_ST_BEFORE
|SSL_ST_CONNECT
:
170 case SSL_ST_OK
|SSL_ST_CONNECT
:
172 if (s
->session
!= NULL
)
174 SSLerr(SSL_F_SSL23_CONNECT
,SSL_R_SSL23_DOING_SESSION_ID_REUSE
);
179 if (cb
!= NULL
) cb(s
,SSL_CB_HANDSHAKE_START
,1);
181 /* s->version=TLS1_VERSION; */
182 s
->type
=SSL_ST_CONNECT
;
184 if (s
->init_buf
== NULL
)
186 if ((buf
=BUF_MEM_new()) == NULL
)
191 if (!BUF_MEM_grow(buf
,SSL3_RT_MAX_PLAIN_LENGTH
))
200 if (!ssl3_setup_buffers(s
)) { ret
= -1; goto end
; }
202 ssl3_init_finished_mac(s
);
204 s
->state
=SSL23_ST_CW_CLNT_HELLO_A
;
205 s
->ctx
->stats
.sess_connect
++;
209 case SSL23_ST_CW_CLNT_HELLO_A
:
210 case SSL23_ST_CW_CLNT_HELLO_B
:
213 ret
=ssl23_client_hello(s
);
214 if (ret
<= 0) goto end
;
215 s
->state
=SSL23_ST_CR_SRVR_HELLO_A
;
220 case SSL23_ST_CR_SRVR_HELLO_A
:
221 case SSL23_ST_CR_SRVR_HELLO_B
:
222 ret
=ssl23_get_server_hello(s
);
223 if (ret
>= 0) cb
=NULL
;
228 SSLerr(SSL_F_SSL23_CONNECT
,SSL_R_UNKNOWN_STATE
);
234 if (s
->debug
) { (void)BIO_flush(s
->wbio
); }
236 if ((cb
!= NULL
) && (s
->state
!= state
))
240 cb(s
,SSL_CB_CONNECT_LOOP
,1);
249 cb(s
,SSL_CB_CONNECT_EXIT
,ret
);
254 static int ssl23_client_hello(SSL
*s
)
259 unsigned long Time
,l
;
261 int version
= 0, version_major
, version_minor
;
265 ssl2_compat
= (s
->options
& SSL_OP_NO_SSLv2
) ? 0 : 1;
267 if (!(s
->options
& SSL_OP_NO_TLSv1
))
269 version
= TLS1_VERSION
;
271 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
273 version
= SSL3_VERSION
;
275 else if (!(s
->options
& SSL_OP_NO_SSLv2
))
277 version
= SSL2_VERSION
;
280 if (version
!= SSL2_VERSION
)
282 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
284 if (s
->tlsext_hostname
!= NULL
)
287 #ifdef TLSEXT_TYPE_opaque_prf_input
288 if (s
->ctx
->tlsext_opaque_prf_input_callback
!= 0 || s
->tlsext_opaque_prf_input
!= NULL
)
293 buf
=(unsigned char *)s
->init_buf
->data
;
294 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
)
297 /* don't reuse session-id's */
298 if (!ssl_get_new_session(s
,0))
304 p
=s
->s3
->client_random
;
305 Time
=(unsigned long)time(NULL
); /* Time */
307 if (RAND_pseudo_bytes(p
,SSL3_RANDOM_SIZE
-4) <= 0)
310 if (version
== TLS1_VERSION
)
312 version_major
= TLS1_VERSION_MAJOR
;
313 version_minor
= TLS1_VERSION_MINOR
;
315 else if (version
== SSL3_VERSION
)
317 version_major
= SSL3_VERSION_MAJOR
;
318 version_minor
= SSL3_VERSION_MINOR
;
320 else if (version
== SSL2_VERSION
)
322 version_major
= SSL2_VERSION_MAJOR
;
323 version_minor
= SSL2_VERSION_MINOR
;
327 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_NO_PROTOCOLS_AVAILABLE
);
331 s
->client_version
= version
;
335 /* create SSL 2.0 compatible Client Hello */
337 /* two byte record header will be written last */
339 p
= d
+ 9; /* leave space for message type, version, individual length fields */
341 *(d
++) = SSL2_MT_CLIENT_HELLO
;
342 *(d
++) = version_major
;
343 *(d
++) = version_minor
;
345 /* Ciphers supported */
346 i
=ssl_cipher_list_to_bytes(s
,SSL_get_ciphers(s
),p
,0);
350 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_NO_CIPHERS_AVAILABLE
);
356 /* put in the session-id length (zero since there is no reuse) */
358 s
->session
->session_id_length
=0;
362 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
363 ch_len
=SSL2_CHALLENGE_LENGTH
;
365 ch_len
=SSL2_MAX_CHALLENGE_LENGTH
;
367 /* write out sslv2 challenge */
368 if (SSL3_RANDOM_SIZE
< ch_len
)
373 memset(&(s
->s3
->client_random
[0]),0,SSL3_RANDOM_SIZE
);
374 if (RAND_pseudo_bytes(&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
) <= 0)
377 memcpy(p
,&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
);
381 buf
[0]=((i
>>8)&0xff)|0x80;
384 /* number of bytes to write */
388 ssl3_finish_mac(s
,&(buf
[2]),i
);
392 /* create Client Hello in SSL 3.0/TLS 1.0 format */
394 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
397 *(p
++) = version_major
;
398 *(p
++) = version_minor
;
401 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
402 p
+= SSL3_RANDOM_SIZE
;
404 /* Session ID (zero since there is no reuse) */
407 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
408 i
=ssl_cipher_list_to_bytes(s
,SSL_get_ciphers(s
),&(p
[2]),ssl3_put_cipher_by_char
);
411 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_NO_CIPHERS_AVAILABLE
);
418 #ifdef OPENSSL_NO_COMP
421 if ((s
->options
& SSL_OP_NO_COMPRESSION
)
422 || !s
->ctx
->comp_methods
)
425 j
=sk_SSL_COMP_num(s
->ctx
->comp_methods
);
429 comp
=sk_SSL_COMP_value(s
->ctx
->comp_methods
,i
);
433 *(p
++)=0; /* Add the NULL method */
435 #ifndef OPENSSL_NO_TLSEXT
437 if (ssl_prepare_clienthello_tlsext(s
) <= 0)
439 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_CLIENTHELLO_TLSEXT
);
442 if ((p
= ssl_add_clienthello_tlsext(s
, p
, buf
+SSL3_RT_MAX_PLAIN_LENGTH
)) == NULL
)
444 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,ERR_R_INTERNAL_ERROR
);
451 /* fill in 4-byte handshake header */
453 *(d
++)=SSL3_MT_CLIENT_HELLO
;
458 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
)
460 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,ERR_R_INTERNAL_ERROR
);
464 /* fill in 5-byte record header */
466 *(d
++) = SSL3_RT_HANDSHAKE
;
467 *(d
++) = version_major
;
468 *(d
++) = version_minor
; /* arguably we should send the *lowest* suported version here
469 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
472 /* number of bytes to write */
476 ssl3_finish_mac(s
,&(buf
[5]), s
->init_num
- 5);
479 s
->state
=SSL23_ST_CW_CLNT_HELLO_B
;
483 /* SSL3_ST_CW_CLNT_HELLO_B */
484 ret
= ssl23_write_bytes(s
);
486 if ((ret
>= 2) && s
->msg_callback
)
488 /* Client Hello has been sent; tell msg_callback */
491 s
->msg_callback(1, SSL2_VERSION
, 0, s
->init_buf
->data
+2, ret
-2, s
, s
->msg_callback_arg
);
493 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
, s
->init_buf
->data
+5, ret
-5, s
, s
->msg_callback_arg
);
499 static int ssl23_get_server_hello(SSL
*s
)
506 n
=ssl23_read_bytes(s
,7);
508 if (n
!= 7) return(n
);
513 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_SERVER_HELLO
) &&
514 (p
[5] == 0x00) && (p
[6] == 0x02))
516 #ifdef OPENSSL_NO_SSL2
517 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNSUPPORTED_PROTOCOL
);
520 /* we are talking sslv2 */
521 /* we need to clean up the SSLv3 setup and put in the
525 if (s
->options
& SSL_OP_NO_SSLv2
)
527 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNSUPPORTED_PROTOCOL
);
538 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
539 ch_len
=SSL2_CHALLENGE_LENGTH
;
541 ch_len
=SSL2_MAX_CHALLENGE_LENGTH
;
543 /* write out sslv2 challenge */
544 i
=(SSL3_RANDOM_SIZE
< ch_len
)
545 ?SSL3_RANDOM_SIZE
:ch_len
;
546 s
->s2
->challenge_length
=i
;
547 memcpy(s
->s2
->challenge
,
548 &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
);
550 if (s
->s3
!= NULL
) ssl3_free(s
);
552 if (!BUF_MEM_grow_clean(s
->init_buf
,
553 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
))
555 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,ERR_R_BUF_LIB
);
559 s
->state
=SSL2_ST_GET_SERVER_HELLO_A
;
560 if (!(s
->client_version
== SSL2_VERSION
))
561 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
562 s
->s2
->ssl2_rollback
=1;
564 /* setup the 7 bytes we have read so we get them from
565 * the sslv2 buffer */
566 s
->rstate
=SSL_ST_READ_HEADER
;
568 s
->packet
= &(s
->s2
->rbuf
[0]);
569 memcpy(s
->packet
,buf
,n
);
573 /* we have already written one */
574 s
->s2
->write_sequence
=1;
576 s
->method
=SSLv2_client_method();
577 s
->handshake_func
=s
->method
->ssl_connect
;
580 else if (p
[1] == SSL3_VERSION_MAJOR
&&
581 (p
[2] == SSL3_VERSION_MINOR
|| p
[2] == TLS1_VERSION_MINOR
) &&
582 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
583 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2)))
585 /* we have sslv3 or tls1 (server hello or alert) */
587 if ((p
[2] == SSL3_VERSION_MINOR
) &&
588 !(s
->options
& SSL_OP_NO_SSLv3
))
590 s
->version
=SSL3_VERSION
;
591 s
->method
=SSLv3_client_method();
593 else if ((p
[2] == TLS1_VERSION_MINOR
) &&
594 !(s
->options
& SSL_OP_NO_TLSv1
))
596 s
->version
=TLS1_VERSION
;
597 s
->method
=TLSv1_client_method();
601 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNSUPPORTED_PROTOCOL
);
605 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
)
609 void (*cb
)(const SSL
*ssl
,int type
,int val
)=NULL
;
612 if (s
->info_callback
!= NULL
)
614 else if (s
->ctx
->info_callback
!= NULL
)
615 cb
=s
->ctx
->info_callback
;
621 cb(s
,SSL_CB_READ_ALERT
,j
);
625 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+5, 2, s
, s
->msg_callback_arg
);
627 s
->rwstate
=SSL_NOTHING
;
628 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_AD_REASON_OFFSET
+p
[6]);
632 if (!ssl_init_wbio_buffer(s
,1)) goto err
;
634 /* we are in this state */
635 s
->state
=SSL3_ST_CR_SRVR_HELLO_A
;
637 /* put the 7 bytes we have read into the input buffer
639 s
->rstate
=SSL_ST_READ_HEADER
;
641 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
642 memcpy(s
->packet
,buf
,n
);
644 s
->s3
->rbuf
.offset
=0;
646 s
->handshake_func
=s
->method
->ssl_connect
;
650 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNKNOWN_PROTOCOL
);
655 /* Since, if we are sending a ssl23 client hello, we are not
656 * reusing a session-id */
657 if (!ssl_get_new_session(s
,0))
660 return(SSL_connect(s
));