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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()); | |
76774c5e DSH |
132 | else if (ver == TLS1_1_VERSION) |
133 | return(TLSv1_1_client_method()); | |
7409d7ad DSH |
134 | else if (ver == TLS1_2_VERSION) |
135 | return(TLSv1_2_client_method()); | |
d02b48c6 RE |
136 | else |
137 | return(NULL); | |
138 | } | |
139 | ||
f3b656b2 DSH |
140 | IMPLEMENT_ssl23_meth_func(SSLv23_client_method, |
141 | ssl_undefined_function, | |
142 | ssl23_connect, | |
143 | ssl23_get_client_method) | |
d02b48c6 | 144 | |
6b691a5c | 145 | int ssl23_connect(SSL *s) |
d02b48c6 | 146 | { |
8d6ad9e3 | 147 | BUF_MEM *buf=NULL; |
7bbcb2f6 | 148 | unsigned long Time=(unsigned long)time(NULL); |
45d87a1f | 149 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
150 | int ret= -1; |
151 | int new_state,state; | |
152 | ||
eb952088 | 153 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 154 | ERR_clear_error(); |
58964a49 | 155 | clear_sys_error(); |
d02b48c6 RE |
156 | |
157 | if (s->info_callback != NULL) | |
158 | cb=s->info_callback; | |
159 | else if (s->ctx->info_callback != NULL) | |
160 | cb=s->ctx->info_callback; | |
161 | ||
d02b48c6 | 162 | s->in_handshake++; |
979689aa | 163 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 RE |
164 | |
165 | for (;;) | |
166 | { | |
167 | state=s->state; | |
168 | ||
169 | switch(s->state) | |
170 | { | |
171 | case SSL_ST_BEFORE: | |
172 | case SSL_ST_CONNECT: | |
173 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
174 | case SSL_ST_OK|SSL_ST_CONNECT: | |
175 | ||
413c4f45 MC |
176 | if (s->session != NULL) |
177 | { | |
178 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE); | |
179 | ret= -1; | |
180 | goto end; | |
181 | } | |
182 | s->server=0; | |
d02b48c6 RE |
183 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
184 | ||
58964a49 | 185 | /* s->version=TLS1_VERSION; */ |
d02b48c6 RE |
186 | s->type=SSL_ST_CONNECT; |
187 | ||
188 | if (s->init_buf == NULL) | |
189 | { | |
190 | if ((buf=BUF_MEM_new()) == NULL) | |
191 | { | |
192 | ret= -1; | |
193 | goto end; | |
194 | } | |
195 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
196 | { | |
197 | ret= -1; | |
198 | goto end; | |
199 | } | |
200 | s->init_buf=buf; | |
8d6ad9e3 | 201 | buf=NULL; |
d02b48c6 RE |
202 | } |
203 | ||
204 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
205 | ||
206 | ssl3_init_finished_mac(s); | |
207 | ||
208 | s->state=SSL23_ST_CW_CLNT_HELLO_A; | |
413c4f45 | 209 | s->ctx->stats.sess_connect++; |
d02b48c6 RE |
210 | s->init_num=0; |
211 | break; | |
212 | ||
213 | case SSL23_ST_CW_CLNT_HELLO_A: | |
214 | case SSL23_ST_CW_CLNT_HELLO_B: | |
215 | ||
216 | s->shutdown=0; | |
217 | ret=ssl23_client_hello(s); | |
218 | if (ret <= 0) goto end; | |
219 | s->state=SSL23_ST_CR_SRVR_HELLO_A; | |
220 | s->init_num=0; | |
221 | ||
222 | break; | |
223 | ||
224 | case SSL23_ST_CR_SRVR_HELLO_A: | |
225 | case SSL23_ST_CR_SRVR_HELLO_B: | |
226 | ret=ssl23_get_server_hello(s); | |
227 | if (ret >= 0) cb=NULL; | |
228 | goto end; | |
dfeab068 | 229 | /* break; */ |
d02b48c6 RE |
230 | |
231 | default: | |
232 | SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); | |
233 | ret= -1; | |
234 | goto end; | |
235 | /* break; */ | |
236 | } | |
237 | ||
d58d092b | 238 | if (s->debug) { (void)BIO_flush(s->wbio); } |
d02b48c6 RE |
239 | |
240 | if ((cb != NULL) && (s->state != state)) | |
241 | { | |
242 | new_state=s->state; | |
243 | s->state=state; | |
244 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
245 | s->state=new_state; | |
246 | } | |
247 | } | |
248 | end: | |
249 | s->in_handshake--; | |
8d6ad9e3 RL |
250 | if (buf != NULL) |
251 | BUF_MEM_free(buf); | |
d02b48c6 RE |
252 | if (cb != NULL) |
253 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
254 | return(ret); | |
255 | } | |
256 | ||
22c98d4a DSH |
257 | static int ssl23_no_ssl2_ciphers(SSL *s) |
258 | { | |
259 | SSL_CIPHER *cipher; | |
260 | STACK_OF(SSL_CIPHER) *ciphers; | |
261 | int i; | |
b362ccab | 262 | ssl_set_client_disabled(s); |
22c98d4a DSH |
263 | ciphers = SSL_get_ciphers(s); |
264 | for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) | |
265 | { | |
266 | cipher = sk_SSL_CIPHER_value(ciphers, i); | |
b362ccab DSH |
267 | if (ssl_cipher_disabled(s, cipher, SSL_SECOP_CIPHER_SUPPORTED)) |
268 | continue; | |
22c98d4a DSH |
269 | if (cipher->algorithm_ssl == SSL_SSLV2) |
270 | return 0; | |
271 | } | |
272 | return 1; | |
273 | } | |
d02b48c6 | 274 | |
2016265d NM |
275 | /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 |
276 | * on failure, 1 on success. */ | |
277 | int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len) | |
278 | { | |
279 | int send_time = 0; | |
280 | if (len < 4) | |
281 | return 0; | |
282 | if (server) | |
283 | send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0; | |
284 | else | |
285 | send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0; | |
286 | if (send_time) | |
287 | { | |
288 | unsigned long Time = time(NULL); | |
289 | unsigned char *p = result; | |
290 | l2n(Time, p); | |
291 | return RAND_pseudo_bytes(p, len-4); | |
292 | } | |
293 | else | |
294 | return RAND_pseudo_bytes(result, len); | |
295 | } | |
296 | ||
6b691a5c | 297 | static int ssl23_client_hello(SSL *s) |
d02b48c6 RE |
298 | { |
299 | unsigned char *buf; | |
300 | unsigned char *p,*d; | |
f10f4447 | 301 | int i,ch_len; |
9f944107 | 302 | unsigned long l; |
c6c2e313 BM |
303 | int ssl2_compat; |
304 | int version = 0, version_major, version_minor; | |
e9add063 | 305 | int al = 0; |
f10f4447 DSH |
306 | #ifndef OPENSSL_NO_COMP |
307 | int j; | |
c6c2e313 | 308 | SSL_COMP *comp; |
f10f4447 | 309 | #endif |
cf82191d | 310 | int ret; |
f2ad3582 | 311 | unsigned long mask, options = s->options; |
d02b48c6 | 312 | |
f2ad3582 | 313 | ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1; |
c6c2e313 | 314 | |
b362ccab DSH |
315 | if (ssl2_compat && !ssl_security(s, SSL_SECOP_SSL2_COMPAT, 0, 0, NULL)) |
316 | ssl2_compat = 0; | |
22c98d4a DSH |
317 | if (ssl2_compat && ssl23_no_ssl2_ciphers(s)) |
318 | ssl2_compat = 0; | |
319 | ||
f2ad3582 AP |
320 | /* |
321 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
322 | * some protocols below X enabled. This is required in order | |
323 | * to maintain "version capability" vector contiguous. So | |
324 | * that if application wants to disable TLS1.0 in favour of | |
325 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
326 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. | |
327 | */ | |
328 | mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1 | |
329 | #if !defined(OPENSSL_NO_SSL3) | |
330 | |SSL_OP_NO_SSLv3 | |
331 | #endif | |
332 | #if !defined(OPENSSL_NO_SSL2) | |
333 | |(ssl2_compat?SSL_OP_NO_SSLv2:0) | |
334 | #endif | |
335 | ; | |
336 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
337 | version = TLS1_2_VERSION; | |
338 | ||
339 | if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) | |
637f374a | 340 | version = TLS1_1_VERSION; |
f2ad3582 AP |
341 | #else |
342 | version = TLS1_1_VERSION; | |
343 | #endif | |
344 | mask &= ~SSL_OP_NO_TLSv1_1; | |
345 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
c6c2e313 | 346 | version = TLS1_VERSION; |
f2ad3582 AP |
347 | mask &= ~SSL_OP_NO_TLSv1; |
348 | #if !defined(OPENSSL_NO_SSL3) | |
349 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
c6c2e313 | 350 | version = SSL3_VERSION; |
f2ad3582 AP |
351 | mask &= ~SSL_OP_NO_SSLv3; |
352 | #endif | |
353 | #if !defined(OPENSSL_NO_SSL2) | |
354 | if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) | |
c6c2e313 | 355 | version = SSL2_VERSION; |
f2ad3582 AP |
356 | #endif |
357 | ||
0702150f | 358 | #ifndef OPENSSL_NO_TLSEXT |
761772d7 BM |
359 | if (version != SSL2_VERSION) |
360 | { | |
361 | /* have to disable SSL 2.0 compatibility if we need TLS extensions */ | |
362 | ||
363 | if (s->tlsext_hostname != NULL) | |
364 | ssl2_compat = 0; | |
67c8e7f4 DSH |
365 | if (s->tlsext_status_type != -1) |
366 | ssl2_compat = 0; | |
761772d7 BM |
367 | #ifdef TLSEXT_TYPE_opaque_prf_input |
368 | if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL) | |
369 | ssl2_compat = 0; | |
370 | #endif | |
0b2bde70 | 371 | if (s->ctx->custom_cli_ext_records_count != 0) |
a9e1c50b | 372 | ssl2_compat = 0; |
36086186 SD |
373 | if (s->ctx->cli_supp_data_records_count != 0) |
374 | ssl2_compat = 0; | |
761772d7 | 375 | } |
0702150f | 376 | #endif |
761772d7 | 377 | |
d02b48c6 RE |
378 | buf=(unsigned char *)s->init_buf->data; |
379 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) | |
380 | { | |
381 | #if 0 | |
382 | /* don't reuse session-id's */ | |
383 | if (!ssl_get_new_session(s,0)) | |
384 | { | |
385 | return(-1); | |
386 | } | |
387 | #endif | |
388 | ||
389 | p=s->s3->client_random; | |
2016265d | 390 | if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) |
7c7667b8 | 391 | return -1; |
d02b48c6 | 392 | |
7409d7ad DSH |
393 | if (version == TLS1_2_VERSION) |
394 | { | |
395 | version_major = TLS1_2_VERSION_MAJOR; | |
396 | version_minor = TLS1_2_VERSION_MINOR; | |
397 | } | |
2ea80354 DSH |
398 | else if (tls1_suiteb(s)) |
399 | { | |
400 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
401 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
402 | return -1; | |
403 | } | |
7409d7ad | 404 | else if (version == TLS1_1_VERSION) |
637f374a DSH |
405 | { |
406 | version_major = TLS1_1_VERSION_MAJOR; | |
407 | version_minor = TLS1_1_VERSION_MINOR; | |
408 | } | |
409 | else if (version == TLS1_VERSION) | |
58964a49 | 410 | { |
c6c2e313 BM |
411 | version_major = TLS1_VERSION_MAJOR; |
412 | version_minor = TLS1_VERSION_MINOR; | |
58964a49 | 413 | } |
086e32a6 DSH |
414 | #ifdef OPENSSL_FIPS |
415 | else if(FIPS_mode()) | |
416 | { | |
417 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
418 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
419 | return -1; | |
420 | } | |
421 | #endif | |
c6c2e313 | 422 | else if (version == SSL3_VERSION) |
58964a49 | 423 | { |
c6c2e313 BM |
424 | version_major = SSL3_VERSION_MAJOR; |
425 | version_minor = SSL3_VERSION_MINOR; | |
58964a49 | 426 | } |
c6c2e313 | 427 | else if (version == SSL2_VERSION) |
58964a49 | 428 | { |
c6c2e313 BM |
429 | version_major = SSL2_VERSION_MAJOR; |
430 | version_minor = SSL2_VERSION_MINOR; | |
58964a49 RE |
431 | } |
432 | else | |
433 | { | |
434 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); | |
435 | return(-1); | |
436 | } | |
d02b48c6 | 437 | |
c6c2e313 | 438 | s->client_version = version; |
d02b48c6 | 439 | |
c6c2e313 BM |
440 | if (ssl2_compat) |
441 | { | |
442 | /* create SSL 2.0 compatible Client Hello */ | |
443 | ||
444 | /* two byte record header will be written last */ | |
445 | d = &(buf[2]); | |
446 | p = d + 9; /* leave space for message type, version, individual length fields */ | |
447 | ||
448 | *(d++) = SSL2_MT_CLIENT_HELLO; | |
449 | *(d++) = version_major; | |
450 | *(d++) = version_minor; | |
451 | ||
452 | /* Ciphers supported */ | |
453 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); | |
454 | if (i == 0) | |
455 | { | |
456 | /* no ciphers */ | |
457 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
458 | return -1; | |
459 | } | |
460 | s2n(i,d); | |
461 | p+=i; | |
462 | ||
463 | /* put in the session-id length (zero since there is no reuse) */ | |
d02b48c6 | 464 | #if 0 |
c6c2e313 | 465 | s->session->session_id_length=0; |
d02b48c6 | 466 | #endif |
c6c2e313 BM |
467 | s2n(0,d); |
468 | ||
469 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
470 | ch_len=SSL2_CHALLENGE_LENGTH; | |
471 | else | |
472 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
473 | ||
474 | /* write out sslv2 challenge */ | |
d41c785d BL |
475 | /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), |
476 | because it is one of SSL2_MAX_CHALLENGE_LENGTH (32) | |
477 | or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the | |
478 | check in for futurproofing */ | |
c6c2e313 BM |
479 | if (SSL3_RANDOM_SIZE < ch_len) |
480 | i=SSL3_RANDOM_SIZE; | |
481 | else | |
482 | i=ch_len; | |
483 | s2n(i,d); | |
484 | memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); | |
485 | if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) | |
486 | return -1; | |
487 | ||
488 | memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
489 | p+=i; | |
490 | ||
491 | i= p- &(buf[2]); | |
492 | buf[0]=((i>>8)&0xff)|0x80; | |
493 | buf[1]=(i&0xff); | |
494 | ||
495 | /* number of bytes to write */ | |
496 | s->init_num=i+2; | |
497 | s->init_off=0; | |
498 | ||
499 | ssl3_finish_mac(s,&(buf[2]),i); | |
500 | } | |
d02b48c6 | 501 | else |
c6c2e313 BM |
502 | { |
503 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
d02b48c6 | 504 | |
c6c2e313 BM |
505 | /* do the record header (5 bytes) and handshake message header (4 bytes) last */ |
506 | d = p = &(buf[9]); | |
507 | ||
508 | *(p++) = version_major; | |
509 | *(p++) = version_minor; | |
510 | ||
511 | /* Random stuff */ | |
512 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
513 | p += SSL3_RANDOM_SIZE; | |
514 | ||
515 | /* Session ID (zero since there is no reuse) */ | |
516 | *(p++) = 0; | |
517 | ||
518 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
519 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); | |
520 | if (i == 0) | |
521 | { | |
522 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
523 | return -1; | |
524 | } | |
800e1cd9 DSH |
525 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
526 | /* Some servers hang if client hello > 256 bytes | |
527 | * as hack workaround chop number of supported ciphers | |
528 | * to keep it well below this if we use TLS v1.2 | |
529 | */ | |
530 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
531 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
532 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
533 | #endif | |
c6c2e313 BM |
534 | s2n(i,p); |
535 | p+=i; | |
536 | ||
537 | /* COMPRESSION */ | |
ed3883d2 BM |
538 | #ifdef OPENSSL_NO_COMP |
539 | *(p++)=1; | |
540 | #else | |
b362ccab | 541 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
c6c2e313 BM |
542 | j=0; |
543 | else | |
544 | j=sk_SSL_COMP_num(s->ctx->comp_methods); | |
545 | *(p++)=1+j; | |
546 | for (i=0; i<j; i++) | |
547 | { | |
548 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); | |
549 | *(p++)=comp->id; | |
550 | } | |
ed3883d2 | 551 | #endif |
c6c2e313 | 552 | *(p++)=0; /* Add the NULL method */ |
f1fd4544 | 553 | |
ed3883d2 | 554 | #ifndef OPENSSL_NO_TLSEXT |
761772d7 BM |
555 | /* TLS extensions*/ |
556 | if (ssl_prepare_clienthello_tlsext(s) <= 0) | |
557 | { | |
558 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); | |
559 | return -1; | |
560 | } | |
e9add063 | 561 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL) |
f1fd4544 | 562 | { |
e9add063 | 563 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
739a543e | 564 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); |
ed3883d2 | 565 | return -1; |
f1fd4544 | 566 | } |
ed3883d2 | 567 | #endif |
c6c2e313 BM |
568 | |
569 | l = p-d; | |
7c7667b8 | 570 | |
c6c2e313 BM |
571 | /* fill in 4-byte handshake header */ |
572 | d=&(buf[5]); | |
573 | *(d++)=SSL3_MT_CLIENT_HELLO; | |
574 | l2n3(l,d); | |
d02b48c6 | 575 | |
c6c2e313 BM |
576 | l += 4; |
577 | ||
578 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) | |
579 | { | |
580 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); | |
581 | return -1; | |
582 | } | |
583 | ||
584 | /* fill in 5-byte record header */ | |
585 | d=buf; | |
586 | *(d++) = SSL3_RT_HANDSHAKE; | |
587 | *(d++) = version_major; | |
293706e7 DSH |
588 | /* Some servers hang if we use long client hellos |
589 | * and a record number > TLS 1.0. | |
590 | */ | |
591 | if (TLS1_get_client_version(s) > TLS1_VERSION) | |
592 | *(d++) = 1; | |
593 | else | |
594 | *(d++) = version_minor; | |
c6c2e313 BM |
595 | s2n((int)l,d); |
596 | ||
597 | /* number of bytes to write */ | |
598 | s->init_num=p-buf; | |
599 | s->init_off=0; | |
600 | ||
601 | ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); | |
602 | } | |
d02b48c6 RE |
603 | |
604 | s->state=SSL23_ST_CW_CLNT_HELLO_B; | |
d02b48c6 | 605 | s->init_off=0; |
d02b48c6 RE |
606 | } |
607 | ||
608 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
cf82191d | 609 | ret = ssl23_write_bytes(s); |
c6c2e313 BM |
610 | |
611 | if ((ret >= 2) && s->msg_callback) | |
612 | { | |
613 | /* Client Hello has been sent; tell msg_callback */ | |
614 | ||
615 | if (ssl2_compat) | |
3f19bbf4 | 616 | s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); |
c6c2e313 | 617 | else |
36b5bb6f DSH |
618 | { |
619 | s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg); | |
c6c2e313 | 620 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); |
36b5bb6f | 621 | } |
c6c2e313 BM |
622 | } |
623 | ||
cf82191d | 624 | return ret; |
d02b48c6 RE |
625 | } |
626 | ||
6b691a5c | 627 | static int ssl23_get_server_hello(SSL *s) |
d02b48c6 RE |
628 | { |
629 | char buf[8]; | |
630 | unsigned char *p; | |
aa82db4f | 631 | int i; |
d02b48c6 | 632 | int n; |
d02b48c6 RE |
633 | |
634 | n=ssl23_read_bytes(s,7); | |
635 | ||
636 | if (n != 7) return(n); | |
637 | p=s->packet; | |
638 | ||
639 | memcpy(buf,p,n); | |
640 | ||
641 | if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && | |
642 | (p[5] == 0x00) && (p[6] == 0x02)) | |
643 | { | |
bc36ee62 | 644 | #ifdef OPENSSL_NO_SSL2 |
aa82db4f UM |
645 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); |
646 | goto err; | |
647 | #else | |
d02b48c6 RE |
648 | /* we are talking sslv2 */ |
649 | /* we need to clean up the SSLv3 setup and put in the | |
650 | * sslv2 stuff. */ | |
aa82db4f | 651 | int ch_len; |
d02b48c6 | 652 | |
58964a49 RE |
653 | if (s->options & SSL_OP_NO_SSLv2) |
654 | { | |
655 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
656 | goto err; | |
657 | } | |
d02b48c6 RE |
658 | if (s->s2 == NULL) |
659 | { | |
660 | if (!ssl2_new(s)) | |
661 | goto err; | |
662 | } | |
663 | else | |
664 | ssl2_clear(s); | |
665 | ||
58964a49 | 666 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) |
d02b48c6 RE |
667 | ch_len=SSL2_CHALLENGE_LENGTH; |
668 | else | |
669 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
670 | ||
671 | /* write out sslv2 challenge */ | |
d41c785d BL |
672 | /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because |
673 | it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or | |
674 | SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for | |
675 | futurproofing */ | |
d02b48c6 RE |
676 | i=(SSL3_RANDOM_SIZE < ch_len) |
677 | ?SSL3_RANDOM_SIZE:ch_len; | |
678 | s->s2->challenge_length=i; | |
679 | memcpy(s->s2->challenge, | |
680 | &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
681 | ||
682 | if (s->s3 != NULL) ssl3_free(s); | |
683 | ||
54a656ef | 684 | if (!BUF_MEM_grow_clean(s->init_buf, |
d02b48c6 RE |
685 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) |
686 | { | |
687 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); | |
688 | goto err; | |
689 | } | |
690 | ||
691 | s->state=SSL2_ST_GET_SERVER_HELLO_A; | |
37569e64 | 692 | if (!(s->client_version == SSL2_VERSION)) |
aa826d88 | 693 | /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */ |
37569e64 | 694 | s->s2->ssl2_rollback=1; |
d02b48c6 | 695 | |
6ad47e83 | 696 | /* setup the 7 bytes we have read so we get them from |
d02b48c6 RE |
697 | * the sslv2 buffer */ |
698 | s->rstate=SSL_ST_READ_HEADER; | |
699 | s->packet_length=n; | |
700 | s->packet= &(s->s2->rbuf[0]); | |
701 | memcpy(s->packet,buf,n); | |
702 | s->s2->rbuf_left=n; | |
703 | s->s2->rbuf_offs=0; | |
704 | ||
705 | /* we have already written one */ | |
706 | s->s2->write_sequence=1; | |
707 | ||
708 | s->method=SSLv2_client_method(); | |
709 | s->handshake_func=s->method->ssl_connect; | |
aa82db4f | 710 | #endif |
d02b48c6 | 711 | } |
6ad47e83 | 712 | else if (p[1] == SSL3_VERSION_MAJOR && |
7409d7ad | 713 | p[2] <= TLS1_2_VERSION_MINOR && |
6ad47e83 BM |
714 | ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || |
715 | (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) | |
d02b48c6 | 716 | { |
6ad47e83 | 717 | /* we have sslv3 or tls1 (server hello or alert) */ |
d02b48c6 | 718 | |
58964a49 RE |
719 | if ((p[2] == SSL3_VERSION_MINOR) && |
720 | !(s->options & SSL_OP_NO_SSLv3)) | |
721 | { | |
086e32a6 DSH |
722 | #ifdef OPENSSL_FIPS |
723 | if(FIPS_mode()) | |
724 | { | |
725 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
726 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
727 | goto err; | |
728 | } | |
729 | #endif | |
58964a49 RE |
730 | s->version=SSL3_VERSION; |
731 | s->method=SSLv3_client_method(); | |
732 | } | |
733 | else if ((p[2] == TLS1_VERSION_MINOR) && | |
734 | !(s->options & SSL_OP_NO_TLSv1)) | |
735 | { | |
736 | s->version=TLS1_VERSION; | |
737 | s->method=TLSv1_client_method(); | |
738 | } | |
637f374a DSH |
739 | else if ((p[2] == TLS1_1_VERSION_MINOR) && |
740 | !(s->options & SSL_OP_NO_TLSv1_1)) | |
741 | { | |
742 | s->version=TLS1_1_VERSION; | |
743 | s->method=TLSv1_1_client_method(); | |
744 | } | |
7409d7ad DSH |
745 | else if ((p[2] == TLS1_2_VERSION_MINOR) && |
746 | !(s->options & SSL_OP_NO_TLSv1_2)) | |
747 | { | |
748 | s->version=TLS1_2_VERSION; | |
749 | s->method=TLSv1_2_client_method(); | |
750 | } | |
58964a49 RE |
751 | else |
752 | { | |
753 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
754 | goto err; | |
755 | } | |
6ad47e83 | 756 | |
b362ccab DSH |
757 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) |
758 | { | |
759 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW); | |
760 | goto err; | |
761 | } | |
762 | ||
6ad47e83 | 763 | if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) |
d02b48c6 | 764 | { |
6ad47e83 BM |
765 | /* fatal alert */ |
766 | ||
767 | void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
768 | int j; | |
769 | ||
770 | if (s->info_callback != NULL) | |
771 | cb=s->info_callback; | |
772 | else if (s->ctx->info_callback != NULL) | |
773 | cb=s->ctx->info_callback; | |
774 | ||
775 | i=p[5]; | |
776 | if (cb != NULL) | |
777 | { | |
778 | j=(i<<8)|p[6]; | |
779 | cb(s,SSL_CB_READ_ALERT,j); | |
780 | } | |
781 | ||
782 | if (s->msg_callback) | |
36b5bb6f DSH |
783 | { |
784 | s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg); | |
6ad47e83 | 785 | s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg); |
36b5bb6f | 786 | } |
6ad47e83 BM |
787 | |
788 | s->rwstate=SSL_NOTHING; | |
789 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]); | |
790 | goto err; | |
d02b48c6 RE |
791 | } |
792 | ||
6ad47e83 | 793 | if (!ssl_init_wbio_buffer(s,1)) goto err; |
241520e6 | 794 | |
6ad47e83 BM |
795 | /* we are in this state */ |
796 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
797 | ||
798 | /* put the 7 bytes we have read into the input buffer | |
799 | * for SSLv3 */ | |
800 | s->rstate=SSL_ST_READ_HEADER; | |
801 | s->packet_length=n; | |
8671b898 BL |
802 | if (s->s3->rbuf.buf == NULL) |
803 | if (!ssl3_setup_read_buffer(s)) | |
804 | goto err; | |
6ad47e83 BM |
805 | s->packet= &(s->s3->rbuf.buf[0]); |
806 | memcpy(s->packet,buf,n); | |
807 | s->s3->rbuf.left=n; | |
808 | s->s3->rbuf.offset=0; | |
809 | ||
810 | s->handshake_func=s->method->ssl_connect; | |
d02b48c6 RE |
811 | } |
812 | else | |
813 | { | |
814 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
815 | goto err; | |
816 | } | |
817 | s->init_num=0; | |
818 | ||
819 | /* Since, if we are sending a ssl23 client hello, we are not | |
820 | * reusing a session-id */ | |
821 | if (!ssl_get_new_session(s,0)) | |
822 | goto err; | |
823 | ||
d02b48c6 RE |
824 | return(SSL_connect(s)); |
825 | err: | |
826 | return(-1); | |
827 | } |