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.]
69 static int ssl23_client_hello(SSL
*s
);
70 static int ssl23_get_server_hello(SSL
*s
);
72 static int ssl23_client_hello();
73 static int ssl23_get_server_hello();
76 static SSL_METHOD
*ssl23_get_client_method(ver
)
79 if (ver
== SSL2_VERSION
)
80 return(SSLv2_client_method());
81 else if (ver
== SSL3_VERSION
)
82 return(SSLv3_client_method());
83 else if (ver
== TLS1_VERSION
)
84 return(TLSv1_client_method());
89 SSL_METHOD
*SSLv23_client_method()
92 static SSL_METHOD SSLv23_client_data
;
97 memcpy((char *)&SSLv23_client_data
,
98 (char *)sslv23_base_method(),sizeof(SSL_METHOD
));
99 SSLv23_client_data
.ssl_connect
=ssl23_connect
;
100 SSLv23_client_data
.get_ssl_method
=ssl23_get_client_method
;
102 return(&SSLv23_client_data
);
109 unsigned long Time
=time(NULL
);
114 RAND_seed((unsigned char *)&Time
,sizeof(Time
));
118 if (s
->info_callback
!= NULL
)
120 else if (s
->ctx
->info_callback
!= NULL
)
121 cb
=s
->ctx
->info_callback
;
123 if (!SSL_in_init(s
) || SSL_in_before(s
)) SSL_clear(s
);
134 case SSL_ST_BEFORE
|SSL_ST_CONNECT
:
135 case SSL_ST_OK
|SSL_ST_CONNECT
:
137 if (cb
!= NULL
) cb(s
,SSL_CB_HANDSHAKE_START
,1);
139 /* s->version=TLS1_VERSION; */
140 s
->type
=SSL_ST_CONNECT
;
142 if (s
->init_buf
== NULL
)
144 if ((buf
=BUF_MEM_new()) == NULL
)
149 if (!BUF_MEM_grow(buf
,SSL3_RT_MAX_PLAIN_LENGTH
))
157 if (!ssl3_setup_buffers(s
)) { ret
= -1; goto end
; }
159 ssl3_init_finished_mac(s
);
161 s
->state
=SSL23_ST_CW_CLNT_HELLO_A
;
162 s
->ctx
->sess_connect
++;
166 case SSL23_ST_CW_CLNT_HELLO_A
:
167 case SSL23_ST_CW_CLNT_HELLO_B
:
170 ret
=ssl23_client_hello(s
);
171 if (ret
<= 0) goto end
;
172 s
->state
=SSL23_ST_CR_SRVR_HELLO_A
;
177 case SSL23_ST_CR_SRVR_HELLO_A
:
178 case SSL23_ST_CR_SRVR_HELLO_B
:
179 ret
=ssl23_get_server_hello(s
);
180 if (ret
>= 0) cb
=NULL
;
185 SSLerr(SSL_F_SSL23_CONNECT
,SSL_R_UNKNOWN_STATE
);
191 if (s
->debug
) BIO_flush(s
->wbio
);
193 if ((cb
!= NULL
) && (s
->state
!= state
))
197 cb(s
,SSL_CB_CONNECT_LOOP
,1);
204 cb(s
,SSL_CB_CONNECT_EXIT
,ret
);
209 static int ssl23_client_hello(s
)
216 buf
=(unsigned char *)s
->init_buf
->data
;
217 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
)
220 /* don't reuse session-id's */
221 if (!ssl_get_new_session(s
,0))
227 p
=s
->s3
->client_random
;
228 RAND_bytes(p
,SSL3_RANDOM_SIZE
);
230 /* Do the message type and length last */
234 *(d
++)=SSL2_MT_CLIENT_HELLO
;
235 if (!(s
->options
& SSL_OP_NO_TLSv1
))
237 *(d
++)=TLS1_VERSION_MAJOR
;
238 *(d
++)=TLS1_VERSION_MINOR
;
240 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
242 *(d
++)=SSL3_VERSION_MAJOR
;
243 *(d
++)=SSL3_VERSION_MINOR
;
245 else if (!(s
->options
& SSL_OP_NO_SSLv2
))
247 *(d
++)=SSL2_VERSION_MAJOR
;
248 *(d
++)=SSL2_VERSION_MINOR
;
252 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_NO_PROTOCOLS_AVAILABLE
);
256 /* Ciphers supported */
257 i
=ssl_cipher_list_to_bytes(s
,SSL_get_ciphers(s
),p
);
261 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,SSL_R_NO_CIPHERS_AVAILABLE
);
267 /* put in the session-id, zero since there is no
270 s
->session
->session_id_length
=0;
274 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
275 ch_len
=SSL2_CHALLENGE_LENGTH
;
277 ch_len
=SSL2_MAX_CHALLENGE_LENGTH
;
279 /* write out sslv2 challenge */
280 if (SSL3_RANDOM_SIZE
< ch_len
)
285 memset(&(s
->s3
->client_random
[0]),0,SSL3_RANDOM_SIZE
);
286 RAND_bytes(&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
);
287 memcpy(p
,&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
);
291 buf
[0]=((i
>>8)&0xff)|0x80;
294 s
->state
=SSL23_ST_CW_CLNT_HELLO_B
;
295 /* number of bytes to write */
299 ssl3_finish_mac(s
,&(buf
[2]),i
);
302 /* SSL3_ST_CW_CLNT_HELLO_B */
303 return(ssl23_write_bytes(s
));
306 static int ssl23_get_server_hello(s
)
314 n
=ssl23_read_bytes(s
,7);
316 if (n
!= 7) return(n
);
321 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_SERVER_HELLO
) &&
322 (p
[5] == 0x00) && (p
[6] == 0x02))
324 /* we are talking sslv2 */
325 /* we need to clean up the SSLv3 setup and put in the
328 if (s
->options
& SSL_OP_NO_SSLv2
)
330 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNSUPPORTED_PROTOCOL
);
341 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
342 ch_len
=SSL2_CHALLENGE_LENGTH
;
344 ch_len
=SSL2_MAX_CHALLENGE_LENGTH
;
346 /* write out sslv2 challenge */
347 i
=(SSL3_RANDOM_SIZE
< ch_len
)
348 ?SSL3_RANDOM_SIZE
:ch_len
;
349 s
->s2
->challenge_length
=i
;
350 memcpy(s
->s2
->challenge
,
351 &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
-i
]),i
);
353 if (s
->s3
!= NULL
) ssl3_free(s
);
355 if (!BUF_MEM_grow(s
->init_buf
,
356 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
))
358 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,ERR_R_BUF_LIB
);
362 s
->state
=SSL2_ST_GET_SERVER_HELLO_A
;
363 s
->s2
->ssl2_rollback
=1;
365 /* setup the 5 bytes we have read so we get them from
366 * the sslv2 buffer */
367 s
->rstate
=SSL_ST_READ_HEADER
;
369 s
->packet
= &(s
->s2
->rbuf
[0]);
370 memcpy(s
->packet
,buf
,n
);
374 /* we have already written one */
375 s
->s2
->write_sequence
=1;
377 s
->method
=SSLv2_client_method();
378 s
->handshake_func
=s
->method
->ssl_connect
;
380 else if ((p
[0] == SSL3_RT_HANDSHAKE
) &&
381 (p
[1] == SSL3_VERSION_MAJOR
) &&
382 ((p
[2] == SSL3_VERSION_MINOR
) ||
383 (p
[2] == TLS1_VERSION_MINOR
)) &&
384 (p
[5] == SSL3_MT_SERVER_HELLO
))
386 /* we have sslv3 or tls1 */
388 if (!ssl_init_wbio_buffer(s
,1)) goto err
;
390 /* we are in this state */
391 s
->state
=SSL3_ST_CR_SRVR_HELLO_A
;
393 /* put the 5 bytes we have read into the input buffer
395 s
->rstate
=SSL_ST_READ_HEADER
;
397 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
398 memcpy(s
->packet
,buf
,n
);
400 s
->s3
->rbuf
.offset
=0;
402 if ((p
[2] == SSL3_VERSION_MINOR
) &&
403 !(s
->options
& SSL_OP_NO_SSLv3
))
405 s
->version
=SSL3_VERSION
;
406 s
->method
=SSLv3_client_method();
408 else if ((p
[2] == TLS1_VERSION_MINOR
) &&
409 !(s
->options
& SSL_OP_NO_TLSv1
))
411 s
->version
=TLS1_VERSION
;
412 s
->method
=TLSv1_client_method();
416 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNSUPPORTED_PROTOCOL
);
420 s
->handshake_func
=s
->method
->ssl_connect
;
422 else if ((p
[0] == SSL3_RT_ALERT
) &&
423 (p
[1] == SSL3_VERSION_MAJOR
) &&
424 ((p
[2] == SSL3_VERSION_MINOR
) ||
425 (p
[2] == TLS1_VERSION_MINOR
)) &&
433 if (s
->info_callback
!= NULL
)
435 else if (s
->ctx
->info_callback
!= NULL
)
436 cb
=s
->ctx
->info_callback
;
442 cb(s
,SSL_CB_READ_ALERT
,j
);
445 s
->rwstate
=SSL_NOTHING
;
446 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,1000+p
[6]);
451 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,SSL_R_UNKNOWN_PROTOCOL
);
456 /* Since, if we are sending a ssl23 client hello, we are not
457 * reusing a session-id */
458 if (!ssl_get_new_session(s
,0))
462 return(SSL_connect(s
));