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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 | { |
62f45cc2 | 124 | #ifndef OPENSSL_NO_SSL3 |
79df9d62 | 125 | if (ver == SSL3_VERSION) |
d02b48c6 | 126 | return(SSLv3_client_method()); |
62f45cc2 GT |
127 | #endif |
128 | if (ver == TLS1_VERSION) | |
58964a49 | 129 | return(TLSv1_client_method()); |
76774c5e DSH |
130 | else if (ver == TLS1_1_VERSION) |
131 | return(TLSv1_1_client_method()); | |
7409d7ad DSH |
132 | else if (ver == TLS1_2_VERSION) |
133 | return(TLSv1_2_client_method()); | |
d02b48c6 RE |
134 | else |
135 | return(NULL); | |
136 | } | |
137 | ||
f3b656b2 DSH |
138 | IMPLEMENT_ssl23_meth_func(SSLv23_client_method, |
139 | ssl_undefined_function, | |
140 | ssl23_connect, | |
141 | ssl23_get_client_method) | |
d02b48c6 | 142 | |
6b691a5c | 143 | int ssl23_connect(SSL *s) |
d02b48c6 | 144 | { |
8d6ad9e3 | 145 | BUF_MEM *buf=NULL; |
7bbcb2f6 | 146 | unsigned long Time=(unsigned long)time(NULL); |
45d87a1f | 147 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
148 | int ret= -1; |
149 | int new_state,state; | |
150 | ||
eb952088 | 151 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 152 | ERR_clear_error(); |
58964a49 | 153 | clear_sys_error(); |
d02b48c6 RE |
154 | |
155 | if (s->info_callback != NULL) | |
156 | cb=s->info_callback; | |
157 | else if (s->ctx->info_callback != NULL) | |
158 | cb=s->ctx->info_callback; | |
159 | ||
d02b48c6 | 160 | s->in_handshake++; |
979689aa | 161 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 RE |
162 | |
163 | for (;;) | |
164 | { | |
165 | state=s->state; | |
166 | ||
167 | switch(s->state) | |
168 | { | |
169 | case SSL_ST_BEFORE: | |
170 | case SSL_ST_CONNECT: | |
171 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
172 | case SSL_ST_OK|SSL_ST_CONNECT: | |
173 | ||
413c4f45 MC |
174 | if (s->session != NULL) |
175 | { | |
176 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE); | |
177 | ret= -1; | |
178 | goto end; | |
179 | } | |
180 | s->server=0; | |
d02b48c6 RE |
181 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
182 | ||
58964a49 | 183 | /* s->version=TLS1_VERSION; */ |
d02b48c6 RE |
184 | s->type=SSL_ST_CONNECT; |
185 | ||
186 | if (s->init_buf == NULL) | |
187 | { | |
188 | if ((buf=BUF_MEM_new()) == NULL) | |
189 | { | |
190 | ret= -1; | |
191 | goto end; | |
192 | } | |
193 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
194 | { | |
195 | ret= -1; | |
196 | goto end; | |
197 | } | |
198 | s->init_buf=buf; | |
8d6ad9e3 | 199 | buf=NULL; |
d02b48c6 RE |
200 | } |
201 | ||
202 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
203 | ||
204 | ssl3_init_finished_mac(s); | |
205 | ||
206 | s->state=SSL23_ST_CW_CLNT_HELLO_A; | |
413c4f45 | 207 | s->ctx->stats.sess_connect++; |
d02b48c6 RE |
208 | s->init_num=0; |
209 | break; | |
210 | ||
211 | case SSL23_ST_CW_CLNT_HELLO_A: | |
212 | case SSL23_ST_CW_CLNT_HELLO_B: | |
213 | ||
214 | s->shutdown=0; | |
215 | ret=ssl23_client_hello(s); | |
216 | if (ret <= 0) goto end; | |
217 | s->state=SSL23_ST_CR_SRVR_HELLO_A; | |
218 | s->init_num=0; | |
219 | ||
220 | break; | |
221 | ||
222 | case SSL23_ST_CR_SRVR_HELLO_A: | |
223 | case SSL23_ST_CR_SRVR_HELLO_B: | |
224 | ret=ssl23_get_server_hello(s); | |
225 | if (ret >= 0) cb=NULL; | |
226 | goto end; | |
dfeab068 | 227 | /* break; */ |
d02b48c6 RE |
228 | |
229 | default: | |
230 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); | |
231 | ret= -1; | |
232 | goto end; | |
233 | /* break; */ | |
234 | } | |
235 | ||
d58d092b | 236 | if (s->debug) { (void)BIO_flush(s->wbio); } |
d02b48c6 RE |
237 | |
238 | if ((cb != NULL) && (s->state != state)) | |
239 | { | |
240 | new_state=s->state; | |
241 | s->state=state; | |
242 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
243 | s->state=new_state; | |
244 | } | |
245 | } | |
246 | end: | |
247 | s->in_handshake--; | |
8d6ad9e3 RL |
248 | if (buf != NULL) |
249 | BUF_MEM_free(buf); | |
d02b48c6 RE |
250 | if (cb != NULL) |
251 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
252 | return(ret); | |
253 | } | |
254 | ||
2016265d NM |
255 | /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 |
256 | * on failure, 1 on success. */ | |
257 | int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len) | |
258 | { | |
259 | int send_time = 0; | |
260 | if (len < 4) | |
261 | return 0; | |
262 | if (server) | |
263 | send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0; | |
264 | else | |
265 | send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0; | |
266 | if (send_time) | |
267 | { | |
2580ab4e | 268 | unsigned long Time = (unsigned long)time(NULL); |
2016265d NM |
269 | unsigned char *p = result; |
270 | l2n(Time, p); | |
271 | return RAND_pseudo_bytes(p, len-4); | |
272 | } | |
273 | else | |
274 | return RAND_pseudo_bytes(result, len); | |
275 | } | |
276 | ||
6b691a5c | 277 | static int ssl23_client_hello(SSL *s) |
d02b48c6 RE |
278 | { |
279 | unsigned char *buf; | |
280 | unsigned char *p,*d; | |
45f55f6a | 281 | int i; |
9f944107 | 282 | unsigned long l; |
c6c2e313 | 283 | int version = 0, version_major, version_minor; |
e9add063 | 284 | int al = 0; |
f10f4447 DSH |
285 | #ifndef OPENSSL_NO_COMP |
286 | int j; | |
c6c2e313 | 287 | SSL_COMP *comp; |
f10f4447 | 288 | #endif |
cf82191d | 289 | int ret; |
f2ad3582 | 290 | unsigned long mask, options = s->options; |
d02b48c6 | 291 | |
f2ad3582 AP |
292 | /* |
293 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
294 | * some protocols below X enabled. This is required in order | |
295 | * to maintain "version capability" vector contiguous. So | |
296 | * that if application wants to disable TLS1.0 in favour of | |
297 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
298 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. | |
299 | */ | |
300 | mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1 | |
301 | #if !defined(OPENSSL_NO_SSL3) | |
302 | |SSL_OP_NO_SSLv3 | |
f2ad3582 AP |
303 | #endif |
304 | ; | |
305 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
306 | version = TLS1_2_VERSION; | |
307 | ||
308 | if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) | |
637f374a | 309 | version = TLS1_1_VERSION; |
f2ad3582 AP |
310 | #else |
311 | version = TLS1_1_VERSION; | |
312 | #endif | |
313 | mask &= ~SSL_OP_NO_TLSv1_1; | |
314 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
c6c2e313 | 315 | version = TLS1_VERSION; |
f2ad3582 AP |
316 | mask &= ~SSL_OP_NO_TLSv1; |
317 | #if !defined(OPENSSL_NO_SSL3) | |
318 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
c6c2e313 | 319 | version = SSL3_VERSION; |
f2ad3582 AP |
320 | mask &= ~SSL_OP_NO_SSLv3; |
321 | #endif | |
761772d7 | 322 | |
d02b48c6 RE |
323 | buf=(unsigned char *)s->init_buf->data; |
324 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) | |
325 | { | |
326 | #if 0 | |
327 | /* don't reuse session-id's */ | |
328 | if (!ssl_get_new_session(s,0)) | |
329 | { | |
330 | return(-1); | |
331 | } | |
332 | #endif | |
333 | ||
334 | p=s->s3->client_random; | |
2016265d | 335 | if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) |
7c7667b8 | 336 | return -1; |
d02b48c6 | 337 | |
7409d7ad DSH |
338 | if (version == TLS1_2_VERSION) |
339 | { | |
340 | version_major = TLS1_2_VERSION_MAJOR; | |
341 | version_minor = TLS1_2_VERSION_MINOR; | |
342 | } | |
2ea80354 DSH |
343 | else if (tls1_suiteb(s)) |
344 | { | |
345 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
346 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
347 | return -1; | |
348 | } | |
7409d7ad | 349 | else if (version == TLS1_1_VERSION) |
637f374a DSH |
350 | { |
351 | version_major = TLS1_1_VERSION_MAJOR; | |
352 | version_minor = TLS1_1_VERSION_MINOR; | |
353 | } | |
354 | else if (version == TLS1_VERSION) | |
58964a49 | 355 | { |
c6c2e313 BM |
356 | version_major = TLS1_VERSION_MAJOR; |
357 | version_minor = TLS1_VERSION_MINOR; | |
58964a49 | 358 | } |
086e32a6 DSH |
359 | #ifdef OPENSSL_FIPS |
360 | else if(FIPS_mode()) | |
361 | { | |
362 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
363 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
364 | return -1; | |
365 | } | |
366 | #endif | |
c6c2e313 | 367 | else if (version == SSL3_VERSION) |
58964a49 | 368 | { |
c6c2e313 BM |
369 | version_major = SSL3_VERSION_MAJOR; |
370 | version_minor = SSL3_VERSION_MINOR; | |
58964a49 | 371 | } |
58964a49 RE |
372 | else |
373 | { | |
374 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); | |
375 | return(-1); | |
376 | } | |
d02b48c6 | 377 | |
c6c2e313 | 378 | s->client_version = version; |
d02b48c6 | 379 | |
45f55f6a | 380 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ |
d02b48c6 | 381 | |
45f55f6a KR |
382 | /* do the record header (5 bytes) and handshake message header (4 bytes) last */ |
383 | d = p = &(buf[9]); | |
384 | ||
385 | *(p++) = version_major; | |
386 | *(p++) = version_minor; | |
c6c2e313 | 387 | |
45f55f6a KR |
388 | /* Random stuff */ |
389 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
390 | p += SSL3_RANDOM_SIZE; | |
c6c2e313 | 391 | |
45f55f6a KR |
392 | /* Session ID (zero since there is no reuse) */ |
393 | *(p++) = 0; | |
c6c2e313 | 394 | |
45f55f6a KR |
395 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ |
396 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); | |
397 | if (i == 0) | |
398 | { | |
399 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
400 | return -1; | |
401 | } | |
800e1cd9 | 402 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
45f55f6a KR |
403 | /* Some servers hang if client hello > 256 bytes |
404 | * as hack workaround chop number of supported ciphers | |
405 | * to keep it well below this if we use TLS v1.2 | |
406 | */ | |
407 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
408 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
409 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
800e1cd9 | 410 | #endif |
45f55f6a KR |
411 | s2n(i,p); |
412 | p+=i; | |
c6c2e313 | 413 | |
45f55f6a | 414 | /* COMPRESSION */ |
ed3883d2 | 415 | #ifdef OPENSSL_NO_COMP |
45f55f6a | 416 | *(p++)=1; |
ed3883d2 | 417 | #else |
45f55f6a KR |
418 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
419 | j=0; | |
420 | else | |
421 | j=sk_SSL_COMP_num(s->ctx->comp_methods); | |
422 | *(p++)=1+j; | |
423 | for (i=0; i<j; i++) | |
424 | { | |
425 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); | |
426 | *(p++)=comp->id; | |
427 | } | |
ed3883d2 | 428 | #endif |
45f55f6a | 429 | *(p++)=0; /* Add the NULL method */ |
f1fd4544 | 430 | |
ed3883d2 | 431 | #ifndef OPENSSL_NO_TLSEXT |
45f55f6a KR |
432 | /* TLS extensions*/ |
433 | if (ssl_prepare_clienthello_tlsext(s) <= 0) | |
434 | { | |
435 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); | |
436 | return -1; | |
437 | } | |
438 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL) | |
439 | { | |
440 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
441 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); | |
442 | return -1; | |
443 | } | |
ed3883d2 | 444 | #endif |
45f55f6a KR |
445 | |
446 | l = p-d; | |
7c7667b8 | 447 | |
45f55f6a KR |
448 | /* fill in 4-byte handshake header */ |
449 | d=&(buf[5]); | |
450 | *(d++)=SSL3_MT_CLIENT_HELLO; | |
451 | l2n3(l,d); | |
d02b48c6 | 452 | |
45f55f6a | 453 | l += 4; |
c6c2e313 | 454 | |
45f55f6a KR |
455 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) |
456 | { | |
457 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); | |
458 | return -1; | |
c6c2e313 | 459 | } |
45f55f6a KR |
460 | |
461 | /* fill in 5-byte record header */ | |
462 | d=buf; | |
463 | *(d++) = SSL3_RT_HANDSHAKE; | |
464 | *(d++) = version_major; | |
465 | /* Some servers hang if we use long client hellos | |
466 | * and a record number > TLS 1.0. | |
467 | */ | |
468 | if (TLS1_get_client_version(s) > TLS1_VERSION) | |
469 | *(d++) = 1; | |
470 | else | |
471 | *(d++) = version_minor; | |
472 | s2n((int)l,d); | |
473 | ||
474 | /* number of bytes to write */ | |
475 | s->init_num=p-buf; | |
476 | s->init_off=0; | |
477 | ||
478 | ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); | |
d02b48c6 RE |
479 | |
480 | s->state=SSL23_ST_CW_CLNT_HELLO_B; | |
d02b48c6 | 481 | s->init_off=0; |
d02b48c6 RE |
482 | } |
483 | ||
484 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
cf82191d | 485 | ret = ssl23_write_bytes(s); |
c6c2e313 BM |
486 | |
487 | if ((ret >= 2) && s->msg_callback) | |
488 | { | |
489 | /* Client Hello has been sent; tell msg_callback */ | |
45f55f6a KR |
490 | s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg); |
491 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); | |
c6c2e313 BM |
492 | } |
493 | ||
cf82191d | 494 | return ret; |
d02b48c6 RE |
495 | } |
496 | ||
6b691a5c | 497 | static int ssl23_get_server_hello(SSL *s) |
d02b48c6 RE |
498 | { |
499 | char buf[8]; | |
500 | unsigned char *p; | |
aa82db4f | 501 | int i; |
d02b48c6 | 502 | int n; |
d02b48c6 RE |
503 | |
504 | n=ssl23_read_bytes(s,7); | |
505 | ||
506 | if (n != 7) return(n); | |
507 | p=s->packet; | |
508 | ||
509 | memcpy(buf,p,n); | |
510 | ||
45f55f6a | 511 | if (p[1] == SSL3_VERSION_MAJOR && |
7409d7ad | 512 | p[2] <= TLS1_2_VERSION_MINOR && |
6ad47e83 BM |
513 | ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || |
514 | (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) | |
d02b48c6 | 515 | { |
6ad47e83 | 516 | /* we have sslv3 or tls1 (server hello or alert) */ |
d02b48c6 | 517 | |
62f45cc2 | 518 | #ifndef OPENSSL_NO_SSL3 |
58964a49 RE |
519 | if ((p[2] == SSL3_VERSION_MINOR) && |
520 | !(s->options & SSL_OP_NO_SSLv3)) | |
521 | { | |
086e32a6 DSH |
522 | #ifdef OPENSSL_FIPS |
523 | if(FIPS_mode()) | |
524 | { | |
525 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
526 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
527 | goto err; | |
528 | } | |
529 | #endif | |
58964a49 RE |
530 | s->version=SSL3_VERSION; |
531 | s->method=SSLv3_client_method(); | |
532 | } | |
62f45cc2 GT |
533 | else |
534 | #endif | |
535 | if ((p[2] == TLS1_VERSION_MINOR) && | |
58964a49 RE |
536 | !(s->options & SSL_OP_NO_TLSv1)) |
537 | { | |
538 | s->version=TLS1_VERSION; | |
539 | s->method=TLSv1_client_method(); | |
540 | } | |
637f374a DSH |
541 | else if ((p[2] == TLS1_1_VERSION_MINOR) && |
542 | !(s->options & SSL_OP_NO_TLSv1_1)) | |
543 | { | |
544 | s->version=TLS1_1_VERSION; | |
545 | s->method=TLSv1_1_client_method(); | |
546 | } | |
7409d7ad DSH |
547 | else if ((p[2] == TLS1_2_VERSION_MINOR) && |
548 | !(s->options & SSL_OP_NO_TLSv1_2)) | |
549 | { | |
550 | s->version=TLS1_2_VERSION; | |
551 | s->method=TLSv1_2_client_method(); | |
552 | } | |
58964a49 RE |
553 | else |
554 | { | |
555 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
556 | goto err; | |
557 | } | |
6ad47e83 | 558 | |
cf6da053 BM |
559 | /* ensure that TLS_MAX_VERSION is up-to-date */ |
560 | OPENSSL_assert(s->version <= TLS_MAX_VERSION); | |
561 | ||
b362ccab DSH |
562 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) |
563 | { | |
564 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW); | |
565 | goto err; | |
566 | } | |
567 | ||
6ad47e83 | 568 | if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) |
d02b48c6 | 569 | { |
6ad47e83 BM |
570 | /* fatal alert */ |
571 | ||
572 | void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
573 | int j; | |
574 | ||
575 | if (s->info_callback != NULL) | |
576 | cb=s->info_callback; | |
577 | else if (s->ctx->info_callback != NULL) | |
578 | cb=s->ctx->info_callback; | |
579 | ||
580 | i=p[5]; | |
581 | if (cb != NULL) | |
582 | { | |
583 | j=(i<<8)|p[6]; | |
584 | cb(s,SSL_CB_READ_ALERT,j); | |
585 | } | |
586 | ||
587 | if (s->msg_callback) | |
36b5bb6f DSH |
588 | { |
589 | s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg); | |
6ad47e83 | 590 | s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg); |
36b5bb6f | 591 | } |
6ad47e83 BM |
592 | |
593 | s->rwstate=SSL_NOTHING; | |
594 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]); | |
595 | goto err; | |
d02b48c6 RE |
596 | } |
597 | ||
6ad47e83 | 598 | if (!ssl_init_wbio_buffer(s,1)) goto err; |
241520e6 | 599 | |
6ad47e83 BM |
600 | /* we are in this state */ |
601 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
602 | ||
603 | /* put the 7 bytes we have read into the input buffer | |
604 | * for SSLv3 */ | |
605 | s->rstate=SSL_ST_READ_HEADER; | |
606 | s->packet_length=n; | |
8671b898 BL |
607 | if (s->s3->rbuf.buf == NULL) |
608 | if (!ssl3_setup_read_buffer(s)) | |
609 | goto err; | |
6ad47e83 BM |
610 | s->packet= &(s->s3->rbuf.buf[0]); |
611 | memcpy(s->packet,buf,n); | |
612 | s->s3->rbuf.left=n; | |
613 | s->s3->rbuf.offset=0; | |
614 | ||
615 | s->handshake_func=s->method->ssl_connect; | |
d02b48c6 RE |
616 | } |
617 | else | |
618 | { | |
619 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
620 | goto err; | |
621 | } | |
622 | s->init_num=0; | |
623 | ||
624 | /* Since, if we are sending a ssl23 client hello, we are not | |
625 | * reusing a session-id */ | |
626 | if (!ssl_get_new_session(s,0)) | |
627 | goto err; | |
628 | ||
d02b48c6 RE |
629 | return(SSL_connect(s)); |
630 | err: | |
631 | return(-1); | |
632 | } |