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.]
60 #include <openssl/buffer.h>
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
69 static SSL_METHOD
*ssl23_get_server_method(int ver
);
70 int ssl23_get_client_hello(SSL
*s
);
72 static SSL_METHOD
*ssl23_get_server_method();
73 int ssl23_get_client_hello();
76 static SSL_METHOD
*ssl23_get_server_method(int ver
)
78 if (ver
== SSL2_VERSION
)
79 return(SSLv2_server_method());
80 else if (ver
== SSL3_VERSION
)
81 return(SSLv3_server_method());
82 else if (ver
== TLS1_VERSION
)
83 return(TLSv1_server_method());
88 SSL_METHOD
*SSLv23_server_method(void)
91 static SSL_METHOD SSLv23_server_data
;
95 memcpy((char *)&SSLv23_server_data
,
96 (char *)sslv23_base_method(),sizeof(SSL_METHOD
));
97 SSLv23_server_data
.ssl_accept
=ssl23_accept
;
98 SSLv23_server_data
.get_ssl_method
=ssl23_get_server_method
;
101 return(&SSLv23_server_data
);
104 int ssl23_accept(SSL
*s
)
107 unsigned long Time
=time(NULL
);
112 RAND_seed(&Time
,sizeof(Time
));
116 if (s
->info_callback
!= NULL
)
118 else if (s
->ctx
->info_callback
!= NULL
)
119 cb
=s
->ctx
->info_callback
;
121 if (!SSL_in_init(s
) || SSL_in_before(s
)) SSL_clear(s
);
132 case SSL_ST_BEFORE
|SSL_ST_ACCEPT
:
133 case SSL_ST_OK
|SSL_ST_ACCEPT
:
136 if (cb
!= NULL
) cb(s
,SSL_CB_HANDSHAKE_START
,1);
138 /* s->version=SSL3_VERSION; */
139 s
->type
=SSL_ST_ACCEPT
;
141 if (s
->init_buf
== NULL
)
143 if ((buf
=BUF_MEM_new()) == NULL
)
148 if (!BUF_MEM_grow(buf
,SSL3_RT_MAX_PLAIN_LENGTH
))
156 ssl3_init_finished_mac(s
);
158 s
->state
=SSL23_ST_SR_CLNT_HELLO_A
;
159 s
->ctx
->stats
.sess_accept
++;
163 case SSL23_ST_SR_CLNT_HELLO_A
:
164 case SSL23_ST_SR_CLNT_HELLO_B
:
167 ret
=ssl23_get_client_hello(s
);
168 if (ret
>= 0) cb
=NULL
;
173 SSLerr(SSL_F_SSL23_ACCEPT
,SSL_R_UNKNOWN_STATE
);
179 if ((cb
!= NULL
) && (s
->state
!= state
))
183 cb(s
,SSL_CB_ACCEPT_LOOP
,1);
189 cb(s
,SSL_CB_ACCEPT_EXIT
,ret
);
195 int ssl23_get_client_hello(SSL
*s
)
198 char *buf
= &(buf_space
[0]);
199 unsigned char *p
,*d
,*dd
;
201 unsigned int csl
,sil
,cl
;
203 int type
=0,use_sslv2_strong
=0;
206 /* read the initial header */
208 if (s
->state
== SSL23_ST_SR_CLNT_HELLO_A
)
210 if (!ssl3_setup_buffers(s
)) goto err
;
212 n
=ssl23_read_bytes(s
,7);
213 if (n
!= 7) return(n
); /* n == -1 || n == 0 */
219 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_CLIENT_HELLO
))
222 if ((p
[3] == 0x00) && (p
[4] == 0x02))
224 v
[0]=p
[3]; v
[1]=p
[4];
226 if (!(s
->options
& SSL_OP_NO_SSLv2
))
229 else if (p
[3] == SSL3_VERSION_MAJOR
)
231 v
[0]=p
[3]; v
[1]=p
[4];
233 if (p
[4] >= TLS1_VERSION_MINOR
)
235 if (!(s
->options
& SSL_OP_NO_TLSv1
))
238 s
->state
=SSL23_ST_SR_CLNT_HELLO_B
;
240 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
242 s
->state
=SSL23_ST_SR_CLNT_HELLO_B
;
244 else if (!(s
->options
& SSL_OP_NO_SSLv2
))
249 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
250 s
->state
=SSL23_ST_SR_CLNT_HELLO_B
;
251 else if (!(s
->options
& SSL_OP_NO_SSLv2
))
254 if (s
->options
& SSL_OP_NON_EXPORT_FIRST
)
256 STACK_OF(SSL_CIPHER
) *sk
;
260 j
=((p
[0]&0x7f)<<8)|p
[1];
263 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_RECORD_TOO_LARGE
);
267 n
=ssl23_read_bytes(s
,j
+2);
268 if (n
<= 0) return(n
);
271 if ((buf
=Malloc(n
)) == NULL
)
273 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,ERR_R_MALLOC_FAILURE
);
282 sk
=ssl_bytes_to_cipher_list(
287 for (j
=0; j
<sk_SSL_CIPHER_num(sk
); j
++)
289 c
=sk_SSL_CIPHER_value(sk
,j
);
290 if (!SSL_C_IS_EXPORT(c
))
292 if ((c
->id
>>24L) == 2L)
308 else if ((p
[0] == SSL3_RT_HANDSHAKE
) &&
309 (p
[1] == SSL3_VERSION_MAJOR
) &&
310 (p
[5] == SSL3_MT_CLIENT_HELLO
))
312 v
[0]=p
[1]; v
[1]=p
[2];
313 /* true SSLv3 or tls1 */
314 if (p
[2] >= TLS1_VERSION_MINOR
)
316 if (!(s
->options
& SSL_OP_NO_TLSv1
))
321 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
324 else if (!(s
->options
& SSL_OP_NO_SSLv3
))
327 else if ((strncmp("GET ", (char *)p
,4) == 0) ||
328 (strncmp("POST ",(char *)p
,5) == 0) ||
329 (strncmp("HEAD ",(char *)p
,5) == 0) ||
330 (strncmp("PUT ", (char *)p
,4) == 0))
332 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_HTTP_REQUEST
);
335 else if (strncmp("CONNECT",(char *)p
,7) == 0)
337 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_HTTPS_PROXY_REQUEST
);
343 if (s
->state
== SSL23_ST_SR_CLNT_HELLO_B
)
345 /* we have a SSLv3/TLSv1 in a SSLv2 header */
348 n
=((p
[0]&0x7f)<<8)|p
[1];
351 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_RECORD_TOO_LARGE
);
355 j
=ssl23_read_bytes(s
,n
+2);
356 if (j
<= 0) return(j
);
358 ssl3_finish_mac(s
,&(s
->packet
[2]),s
->packet_length
-2);
365 d
=(unsigned char *)s
->init_buf
->data
;
366 if ((csl
+sil
+cl
+11) != s
->packet_length
)
368 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_RECORD_LENGTH_MISMATCH
);
372 *(d
++)=SSL3_VERSION_MAJOR
;
374 *(d
++)=TLS1_VERSION_MINOR
;
376 *(d
++)=SSL3_VERSION_MINOR
;
378 /* lets populate the random area */
379 /* get the chalenge_length */
380 i
=(cl
> SSL3_RANDOM_SIZE
)?SSL3_RANDOM_SIZE
:cl
;
381 memset(d
,0,SSL3_RANDOM_SIZE
);
382 memcpy(&(d
[SSL3_RANDOM_SIZE
-i
]),&(p
[csl
+sil
]),i
);
385 /* no session-id reuse */
392 for (i
=0; i
<csl
; i
+=3)
394 if (p
[i
] != 0) continue;
405 i
=(d
-(unsigned char *)s
->init_buf
->data
);
407 /* get the data reused from the init_buf */
408 s
->s3
->tmp
.reuse_message
=1;
409 s
->s3
->tmp
.message_type
=SSL3_MT_CLIENT_HELLO
;
410 s
->s3
->tmp
.message_size
=i
;
415 /* we are talking sslv2 */
416 /* we need to clean up the SSLv3/TLSv1 setup and put in the
427 if (s
->s3
!= NULL
) ssl3_free(s
);
429 if (!BUF_MEM_grow(s
->init_buf
,
430 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
))
435 s
->state
=SSL2_ST_GET_CLIENT_HELLO_A
;
436 if ((s
->options
& SSL_OP_MSIE_SSLV2_RSA_PADDING
) ||
438 s
->s2
->ssl2_rollback
=0;
440 s
->s2
->ssl2_rollback
=1;
442 /* setup the 5 bytes we have read so we get them from
443 * the sslv2 buffer */
444 s
->rstate
=SSL_ST_READ_HEADER
;
446 s
->packet
= &(s
->s2
->rbuf
[0]);
447 memcpy(s
->packet
,buf
,n
);
451 s
->method
=SSLv2_server_method();
452 s
->handshake_func
=s
->method
->ssl_accept
;
455 if ((type
== 2) || (type
== 3))
457 /* we have SSLv3/TLSv1 */
459 if (!ssl_init_wbio_buffer(s
,1)) goto err
;
461 /* we are in this state */
462 s
->state
=SSL3_ST_SR_CLNT_HELLO_A
;
466 /* put the 'n' bytes we have read into the input buffer
468 s
->rstate
=SSL_ST_READ_HEADER
;
470 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
471 memcpy(s
->packet
,buf
,n
);
473 s
->s3
->rbuf
.offset
=0;
479 s
->s3
->rbuf
.offset
=0;
484 s
->version
=TLS1_VERSION
;
485 s
->method
=TLSv1_server_method();
489 s
->version
=SSL3_VERSION
;
490 s
->method
=SSLv3_server_method();
492 s
->client_version
=(v
[0]<<8)|v
[1];
493 s
->handshake_func
=s
->method
->ssl_accept
;
496 if ((type
< 1) || (type
> 3))
499 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO
,SSL_R_UNKNOWN_PROTOCOL
);
504 if (buf
!= buf_space
) Free(buf
);
506 return(SSL_accept(s
));
508 if (buf
!= buf_space
) Free(buf
);