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d02b48c6 | 1 | /* ssl/s23_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
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)" | |
40 | * | |
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 | |
51 | * SUCH DAMAGE. | |
52 | * | |
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.] | |
57 | */ | |
f1fd4544 BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
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 | |
71 | * distribution. | |
72 | * | |
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/)" | |
77 | * | |
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. | |
82 | * | |
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. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
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 | * ==================================================================== | |
105 | * | |
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). | |
109 | * | |
110 | */ | |
d02b48c6 RE |
111 | |
112 | #include <stdio.h> | |
7b63c0fa | 113 | #include "ssl_locl.h" |
ec577822 BM |
114 | #include <openssl/buffer.h> |
115 | #include <openssl/rand.h> | |
116 | #include <openssl/objects.h> | |
117 | #include <openssl/evp.h> | |
d02b48c6 | 118 | |
4ebb342f | 119 | static const SSL_METHOD *ssl23_get_client_method(int ver); |
d02b48c6 RE |
120 | static int ssl23_client_hello(SSL *s); |
121 | static int ssl23_get_server_hello(SSL *s); | |
4ebb342f | 122 | static const SSL_METHOD *ssl23_get_client_method(int ver) |
d02b48c6 | 123 | { |
bc36ee62 | 124 | #ifndef OPENSSL_NO_SSL2 |
58964a49 | 125 | if (ver == SSL2_VERSION) |
d02b48c6 | 126 | return(SSLv2_client_method()); |
aa82db4f | 127 | #endif |
79df9d62 | 128 | if (ver == SSL3_VERSION) |
d02b48c6 | 129 | return(SSLv3_client_method()); |
58964a49 RE |
130 | else if (ver == TLS1_VERSION) |
131 | return(TLSv1_client_method()); | |
d02b48c6 RE |
132 | else |
133 | return(NULL); | |
134 | } | |
135 | ||
f3b656b2 DSH |
136 | IMPLEMENT_ssl23_meth_func(SSLv23_client_method, |
137 | ssl_undefined_function, | |
138 | ssl23_connect, | |
139 | ssl23_get_client_method) | |
d02b48c6 | 140 | |
6b691a5c | 141 | int ssl23_connect(SSL *s) |
d02b48c6 | 142 | { |
8d6ad9e3 | 143 | BUF_MEM *buf=NULL; |
7bbcb2f6 | 144 | unsigned long Time=(unsigned long)time(NULL); |
45d87a1f | 145 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
146 | int ret= -1; |
147 | int new_state,state; | |
148 | ||
eb952088 | 149 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 150 | ERR_clear_error(); |
58964a49 | 151 | clear_sys_error(); |
d02b48c6 RE |
152 | |
153 | if (s->info_callback != NULL) | |
154 | cb=s->info_callback; | |
155 | else if (s->ctx->info_callback != NULL) | |
156 | cb=s->ctx->info_callback; | |
157 | ||
d02b48c6 | 158 | s->in_handshake++; |
979689aa | 159 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 RE |
160 | |
161 | for (;;) | |
162 | { | |
163 | state=s->state; | |
164 | ||
165 | switch(s->state) | |
166 | { | |
167 | case SSL_ST_BEFORE: | |
168 | case SSL_ST_CONNECT: | |
169 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
170 | case SSL_ST_OK|SSL_ST_CONNECT: | |
171 | ||
413c4f45 MC |
172 | if (s->session != NULL) |
173 | { | |
174 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE); | |
175 | ret= -1; | |
176 | goto end; | |
177 | } | |
178 | s->server=0; | |
d02b48c6 RE |
179 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
180 | ||
58964a49 | 181 | /* s->version=TLS1_VERSION; */ |
d02b48c6 RE |
182 | s->type=SSL_ST_CONNECT; |
183 | ||
184 | if (s->init_buf == NULL) | |
185 | { | |
186 | if ((buf=BUF_MEM_new()) == NULL) | |
187 | { | |
188 | ret= -1; | |
189 | goto end; | |
190 | } | |
191 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
192 | { | |
193 | ret= -1; | |
194 | goto end; | |
195 | } | |
196 | s->init_buf=buf; | |
8d6ad9e3 | 197 | buf=NULL; |
d02b48c6 RE |
198 | } |
199 | ||
200 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
201 | ||
202 | ssl3_init_finished_mac(s); | |
203 | ||
204 | s->state=SSL23_ST_CW_CLNT_HELLO_A; | |
413c4f45 | 205 | s->ctx->stats.sess_connect++; |
d02b48c6 RE |
206 | s->init_num=0; |
207 | break; | |
208 | ||
209 | case SSL23_ST_CW_CLNT_HELLO_A: | |
210 | case SSL23_ST_CW_CLNT_HELLO_B: | |
211 | ||
212 | s->shutdown=0; | |
213 | ret=ssl23_client_hello(s); | |
214 | if (ret <= 0) goto end; | |
215 | s->state=SSL23_ST_CR_SRVR_HELLO_A; | |
216 | s->init_num=0; | |
217 | ||
218 | break; | |
219 | ||
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; | |
224 | goto end; | |
dfeab068 | 225 | /* break; */ |
d02b48c6 RE |
226 | |
227 | default: | |
228 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); | |
229 | ret= -1; | |
230 | goto end; | |
231 | /* break; */ | |
232 | } | |
233 | ||
d58d092b | 234 | if (s->debug) { (void)BIO_flush(s->wbio); } |
d02b48c6 RE |
235 | |
236 | if ((cb != NULL) && (s->state != state)) | |
237 | { | |
238 | new_state=s->state; | |
239 | s->state=state; | |
240 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
241 | s->state=new_state; | |
242 | } | |
243 | } | |
244 | end: | |
245 | s->in_handshake--; | |
8d6ad9e3 RL |
246 | if (buf != NULL) |
247 | BUF_MEM_free(buf); | |
d02b48c6 RE |
248 | if (cb != NULL) |
249 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
250 | return(ret); | |
251 | } | |
252 | ||
253 | ||
6b691a5c | 254 | static int ssl23_client_hello(SSL *s) |
d02b48c6 RE |
255 | { |
256 | unsigned char *buf; | |
257 | unsigned char *p,*d; | |
c6c2e313 BM |
258 | int i,j,ch_len; |
259 | unsigned long Time,l; | |
260 | int ssl2_compat; | |
261 | int version = 0, version_major, version_minor; | |
262 | SSL_COMP *comp; | |
cf82191d | 263 | int ret; |
d02b48c6 | 264 | |
c6c2e313 BM |
265 | ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1; |
266 | ||
267 | if (!(s->options & SSL_OP_NO_TLSv1)) | |
268 | { | |
269 | version = TLS1_VERSION; | |
270 | } | |
271 | else if (!(s->options & SSL_OP_NO_SSLv3)) | |
272 | { | |
273 | version = SSL3_VERSION; | |
274 | } | |
275 | else if (!(s->options & SSL_OP_NO_SSLv2)) | |
276 | { | |
277 | version = SSL2_VERSION; | |
278 | } | |
279 | ||
d02b48c6 RE |
280 | buf=(unsigned char *)s->init_buf->data; |
281 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) | |
282 | { | |
283 | #if 0 | |
284 | /* don't reuse session-id's */ | |
285 | if (!ssl_get_new_session(s,0)) | |
286 | { | |
287 | return(-1); | |
288 | } | |
289 | #endif | |
290 | ||
291 | p=s->s3->client_random; | |
7bbcb2f6 | 292 | Time=(unsigned long)time(NULL); /* Time */ |
c6c2e313 BM |
293 | l2n(Time,p); |
294 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) | |
7c7667b8 | 295 | return -1; |
d02b48c6 | 296 | |
c6c2e313 | 297 | if (version == TLS1_VERSION) |
58964a49 | 298 | { |
c6c2e313 BM |
299 | version_major = TLS1_VERSION_MAJOR; |
300 | version_minor = TLS1_VERSION_MINOR; | |
58964a49 | 301 | } |
c6c2e313 | 302 | else if (version == SSL3_VERSION) |
58964a49 | 303 | { |
c6c2e313 BM |
304 | version_major = SSL3_VERSION_MAJOR; |
305 | version_minor = SSL3_VERSION_MINOR; | |
58964a49 | 306 | } |
c6c2e313 | 307 | else if (version == SSL2_VERSION) |
58964a49 | 308 | { |
c6c2e313 BM |
309 | version_major = SSL2_VERSION_MAJOR; |
310 | version_minor = SSL2_VERSION_MINOR; | |
58964a49 RE |
311 | } |
312 | else | |
313 | { | |
314 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); | |
315 | return(-1); | |
316 | } | |
d02b48c6 | 317 | |
c6c2e313 | 318 | s->client_version = version; |
d02b48c6 | 319 | |
c6c2e313 BM |
320 | if (ssl2_compat) |
321 | { | |
322 | /* create SSL 2.0 compatible Client Hello */ | |
323 | ||
324 | /* two byte record header will be written last */ | |
325 | d = &(buf[2]); | |
326 | p = d + 9; /* leave space for message type, version, individual length fields */ | |
327 | ||
328 | *(d++) = SSL2_MT_CLIENT_HELLO; | |
329 | *(d++) = version_major; | |
330 | *(d++) = version_minor; | |
331 | ||
332 | /* Ciphers supported */ | |
333 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); | |
334 | if (i == 0) | |
335 | { | |
336 | /* no ciphers */ | |
337 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
338 | return -1; | |
339 | } | |
340 | s2n(i,d); | |
341 | p+=i; | |
342 | ||
343 | /* put in the session-id length (zero since there is no reuse) */ | |
d02b48c6 | 344 | #if 0 |
c6c2e313 | 345 | s->session->session_id_length=0; |
d02b48c6 | 346 | #endif |
c6c2e313 BM |
347 | s2n(0,d); |
348 | ||
349 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
350 | ch_len=SSL2_CHALLENGE_LENGTH; | |
351 | else | |
352 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
353 | ||
354 | /* write out sslv2 challenge */ | |
355 | if (SSL3_RANDOM_SIZE < ch_len) | |
356 | i=SSL3_RANDOM_SIZE; | |
357 | else | |
358 | i=ch_len; | |
359 | s2n(i,d); | |
360 | memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); | |
361 | if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) | |
362 | return -1; | |
363 | ||
364 | memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
365 | p+=i; | |
366 | ||
367 | i= p- &(buf[2]); | |
368 | buf[0]=((i>>8)&0xff)|0x80; | |
369 | buf[1]=(i&0xff); | |
370 | ||
371 | /* number of bytes to write */ | |
372 | s->init_num=i+2; | |
373 | s->init_off=0; | |
374 | ||
375 | ssl3_finish_mac(s,&(buf[2]),i); | |
376 | } | |
d02b48c6 | 377 | else |
c6c2e313 BM |
378 | { |
379 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
d02b48c6 | 380 | |
c6c2e313 BM |
381 | /* do the record header (5 bytes) and handshake message header (4 bytes) last */ |
382 | d = p = &(buf[9]); | |
383 | ||
384 | *(p++) = version_major; | |
385 | *(p++) = version_minor; | |
386 | ||
387 | /* Random stuff */ | |
388 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
389 | p += SSL3_RANDOM_SIZE; | |
390 | ||
391 | /* Session ID (zero since there is no reuse) */ | |
392 | *(p++) = 0; | |
393 | ||
394 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
395 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); | |
396 | if (i == 0) | |
397 | { | |
398 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
399 | return -1; | |
400 | } | |
401 | s2n(i,p); | |
402 | p+=i; | |
403 | ||
404 | /* COMPRESSION */ | |
ed3883d2 BM |
405 | #ifdef OPENSSL_NO_COMP |
406 | *(p++)=1; | |
407 | #else | |
566dda07 DSH |
408 | if ((s->options & SSL_OP_NO_COMPRESSION) |
409 | || !s->ctx->comp_methods) | |
c6c2e313 BM |
410 | j=0; |
411 | else | |
412 | j=sk_SSL_COMP_num(s->ctx->comp_methods); | |
413 | *(p++)=1+j; | |
414 | for (i=0; i<j; i++) | |
415 | { | |
416 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); | |
417 | *(p++)=comp->id; | |
418 | } | |
ed3883d2 | 419 | #endif |
c6c2e313 | 420 | *(p++)=0; /* Add the NULL method */ |
f1fd4544 | 421 | |
ed3883d2 | 422 | #ifndef OPENSSL_NO_TLSEXT |
f1fd4544 BM |
423 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
424 | { | |
ed3883d2 BM |
425 | SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); |
426 | return -1; | |
f1fd4544 | 427 | } |
ed3883d2 | 428 | #endif |
c6c2e313 BM |
429 | |
430 | l = p-d; | |
7c7667b8 | 431 | |
c6c2e313 BM |
432 | /* fill in 4-byte handshake header */ |
433 | d=&(buf[5]); | |
434 | *(d++)=SSL3_MT_CLIENT_HELLO; | |
435 | l2n3(l,d); | |
d02b48c6 | 436 | |
c6c2e313 BM |
437 | l += 4; |
438 | ||
439 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) | |
440 | { | |
441 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); | |
442 | return -1; | |
443 | } | |
444 | ||
445 | /* fill in 5-byte record header */ | |
446 | d=buf; | |
447 | *(d++) = SSL3_RT_HANDSHAKE; | |
448 | *(d++) = version_major; | |
449 | *(d++) = version_minor; /* arguably we should send the *lowest* suported version here | |
450 | * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */ | |
451 | s2n((int)l,d); | |
452 | ||
453 | /* number of bytes to write */ | |
454 | s->init_num=p-buf; | |
455 | s->init_off=0; | |
456 | ||
457 | ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); | |
458 | } | |
d02b48c6 RE |
459 | |
460 | s->state=SSL23_ST_CW_CLNT_HELLO_B; | |
d02b48c6 | 461 | s->init_off=0; |
d02b48c6 RE |
462 | } |
463 | ||
464 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
cf82191d | 465 | ret = ssl23_write_bytes(s); |
c6c2e313 BM |
466 | |
467 | if ((ret >= 2) && s->msg_callback) | |
468 | { | |
469 | /* Client Hello has been sent; tell msg_callback */ | |
470 | ||
471 | if (ssl2_compat) | |
3f19bbf4 | 472 | s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); |
c6c2e313 BM |
473 | else |
474 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); | |
475 | } | |
476 | ||
cf82191d | 477 | return ret; |
d02b48c6 RE |
478 | } |
479 | ||
6b691a5c | 480 | static int ssl23_get_server_hello(SSL *s) |
d02b48c6 RE |
481 | { |
482 | char buf[8]; | |
483 | unsigned char *p; | |
aa82db4f | 484 | int i; |
d02b48c6 | 485 | int n; |
d02b48c6 RE |
486 | |
487 | n=ssl23_read_bytes(s,7); | |
488 | ||
489 | if (n != 7) return(n); | |
490 | p=s->packet; | |
491 | ||
492 | memcpy(buf,p,n); | |
493 | ||
494 | if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && | |
495 | (p[5] == 0x00) && (p[6] == 0x02)) | |
496 | { | |
bc36ee62 | 497 | #ifdef OPENSSL_NO_SSL2 |
aa82db4f UM |
498 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); |
499 | goto err; | |
500 | #else | |
d02b48c6 RE |
501 | /* we are talking sslv2 */ |
502 | /* we need to clean up the SSLv3 setup and put in the | |
503 | * sslv2 stuff. */ | |
aa82db4f | 504 | int ch_len; |
d02b48c6 | 505 | |
58964a49 RE |
506 | if (s->options & SSL_OP_NO_SSLv2) |
507 | { | |
508 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
509 | goto err; | |
510 | } | |
d02b48c6 RE |
511 | if (s->s2 == NULL) |
512 | { | |
513 | if (!ssl2_new(s)) | |
514 | goto err; | |
515 | } | |
516 | else | |
517 | ssl2_clear(s); | |
518 | ||
58964a49 | 519 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) |
d02b48c6 RE |
520 | ch_len=SSL2_CHALLENGE_LENGTH; |
521 | else | |
522 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
523 | ||
524 | /* write out sslv2 challenge */ | |
525 | i=(SSL3_RANDOM_SIZE < ch_len) | |
526 | ?SSL3_RANDOM_SIZE:ch_len; | |
527 | s->s2->challenge_length=i; | |
528 | memcpy(s->s2->challenge, | |
529 | &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
530 | ||
531 | if (s->s3 != NULL) ssl3_free(s); | |
532 | ||
54a656ef | 533 | if (!BUF_MEM_grow_clean(s->init_buf, |
d02b48c6 RE |
534 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) |
535 | { | |
536 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); | |
537 | goto err; | |
538 | } | |
539 | ||
540 | s->state=SSL2_ST_GET_SERVER_HELLO_A; | |
37569e64 | 541 | if (!(s->client_version == SSL2_VERSION)) |
aa826d88 | 542 | /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */ |
37569e64 | 543 | s->s2->ssl2_rollback=1; |
d02b48c6 RE |
544 | |
545 | /* setup the 5 bytes we have read so we get them from | |
546 | * the sslv2 buffer */ | |
547 | s->rstate=SSL_ST_READ_HEADER; | |
548 | s->packet_length=n; | |
549 | s->packet= &(s->s2->rbuf[0]); | |
550 | memcpy(s->packet,buf,n); | |
551 | s->s2->rbuf_left=n; | |
552 | s->s2->rbuf_offs=0; | |
553 | ||
554 | /* we have already written one */ | |
555 | s->s2->write_sequence=1; | |
556 | ||
557 | s->method=SSLv2_client_method(); | |
558 | s->handshake_func=s->method->ssl_connect; | |
aa82db4f | 559 | #endif |
d02b48c6 RE |
560 | } |
561 | else if ((p[0] == SSL3_RT_HANDSHAKE) && | |
562 | (p[1] == SSL3_VERSION_MAJOR) && | |
58964a49 RE |
563 | ((p[2] == SSL3_VERSION_MINOR) || |
564 | (p[2] == TLS1_VERSION_MINOR)) && | |
d02b48c6 RE |
565 | (p[5] == SSL3_MT_SERVER_HELLO)) |
566 | { | |
58964a49 | 567 | /* we have sslv3 or tls1 */ |
d02b48c6 | 568 | |
58964a49 | 569 | if (!ssl_init_wbio_buffer(s,1)) goto err; |
d02b48c6 RE |
570 | |
571 | /* we are in this state */ | |
572 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
573 | ||
574 | /* put the 5 bytes we have read into the input buffer | |
575 | * for SSLv3 */ | |
576 | s->rstate=SSL_ST_READ_HEADER; | |
577 | s->packet_length=n; | |
578 | s->packet= &(s->s3->rbuf.buf[0]); | |
579 | memcpy(s->packet,buf,n); | |
580 | s->s3->rbuf.left=n; | |
581 | s->s3->rbuf.offset=0; | |
582 | ||
58964a49 RE |
583 | if ((p[2] == SSL3_VERSION_MINOR) && |
584 | !(s->options & SSL_OP_NO_SSLv3)) | |
585 | { | |
586 | s->version=SSL3_VERSION; | |
587 | s->method=SSLv3_client_method(); | |
588 | } | |
589 | else if ((p[2] == TLS1_VERSION_MINOR) && | |
590 | !(s->options & SSL_OP_NO_TLSv1)) | |
591 | { | |
592 | s->version=TLS1_VERSION; | |
593 | s->method=TLSv1_client_method(); | |
594 | } | |
595 | else | |
596 | { | |
597 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
598 | goto err; | |
599 | } | |
600 | ||
d02b48c6 RE |
601 | s->handshake_func=s->method->ssl_connect; |
602 | } | |
603 | else if ((p[0] == SSL3_RT_ALERT) && | |
604 | (p[1] == SSL3_VERSION_MAJOR) && | |
58964a49 RE |
605 | ((p[2] == SSL3_VERSION_MINOR) || |
606 | (p[2] == TLS1_VERSION_MINOR)) && | |
d02b48c6 RE |
607 | (p[3] == 0) && |
608 | (p[4] == 2)) | |
609 | { | |
45d87a1f | 610 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
611 | int j; |
612 | ||
613 | /* An alert */ | |
614 | if (s->info_callback != NULL) | |
615 | cb=s->info_callback; | |
616 | else if (s->ctx->info_callback != NULL) | |
617 | cb=s->ctx->info_callback; | |
618 | ||
619 | i=p[5]; | |
620 | if (cb != NULL) | |
621 | { | |
622 | j=(i<<8)|p[6]; | |
623 | cb(s,SSL_CB_READ_ALERT,j); | |
624 | } | |
625 | ||
626 | s->rwstate=SSL_NOTHING; | |
dfeab068 | 627 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]); |
d02b48c6 RE |
628 | goto err; |
629 | } | |
630 | else | |
631 | { | |
632 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
633 | goto err; | |
634 | } | |
635 | s->init_num=0; | |
636 | ||
637 | /* Since, if we are sending a ssl23 client hello, we are not | |
638 | * reusing a session-id */ | |
639 | if (!ssl_get_new_session(s,0)) | |
640 | goto err; | |
641 | ||
642 | s->first_packet=1; | |
643 | return(SSL_connect(s)); | |
644 | err: | |
645 | return(-1); | |
646 | } | |
647 |