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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; | |
262 | ciphers = SSL_get_ciphers(s); | |
263 | for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) | |
264 | { | |
265 | cipher = sk_SSL_CIPHER_value(ciphers, i); | |
266 | if (cipher->algorithm_ssl == SSL_SSLV2) | |
267 | return 0; | |
268 | } | |
269 | return 1; | |
270 | } | |
d02b48c6 | 271 | |
6b691a5c | 272 | static int ssl23_client_hello(SSL *s) |
d02b48c6 RE |
273 | { |
274 | unsigned char *buf; | |
275 | unsigned char *p,*d; | |
f10f4447 | 276 | int i,ch_len; |
c6c2e313 BM |
277 | unsigned long Time,l; |
278 | int ssl2_compat; | |
279 | int version = 0, version_major, version_minor; | |
f10f4447 DSH |
280 | #ifndef OPENSSL_NO_COMP |
281 | int j; | |
c6c2e313 | 282 | SSL_COMP *comp; |
f10f4447 | 283 | #endif |
cf82191d | 284 | int ret; |
f2ad3582 | 285 | unsigned long mask, options = s->options; |
d02b48c6 | 286 | |
f2ad3582 | 287 | ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1; |
c6c2e313 | 288 | |
22c98d4a DSH |
289 | if (ssl2_compat && ssl23_no_ssl2_ciphers(s)) |
290 | ssl2_compat = 0; | |
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 | |
303 | #endif | |
304 | #if !defined(OPENSSL_NO_SSL2) | |
305 | |(ssl2_compat?SSL_OP_NO_SSLv2:0) | |
306 | #endif | |
307 | ; | |
308 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
309 | version = TLS1_2_VERSION; | |
310 | ||
311 | if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) | |
637f374a | 312 | version = TLS1_1_VERSION; |
f2ad3582 AP |
313 | #else |
314 | version = TLS1_1_VERSION; | |
315 | #endif | |
316 | mask &= ~SSL_OP_NO_TLSv1_1; | |
317 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
c6c2e313 | 318 | version = TLS1_VERSION; |
f2ad3582 AP |
319 | mask &= ~SSL_OP_NO_TLSv1; |
320 | #if !defined(OPENSSL_NO_SSL3) | |
321 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
c6c2e313 | 322 | version = SSL3_VERSION; |
f2ad3582 AP |
323 | mask &= ~SSL_OP_NO_SSLv3; |
324 | #endif | |
325 | #if !defined(OPENSSL_NO_SSL2) | |
326 | if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) | |
c6c2e313 | 327 | version = SSL2_VERSION; |
f2ad3582 AP |
328 | #endif |
329 | ||
0702150f | 330 | #ifndef OPENSSL_NO_TLSEXT |
761772d7 BM |
331 | if (version != SSL2_VERSION) |
332 | { | |
333 | /* have to disable SSL 2.0 compatibility if we need TLS extensions */ | |
334 | ||
335 | if (s->tlsext_hostname != NULL) | |
336 | ssl2_compat = 0; | |
67c8e7f4 DSH |
337 | if (s->tlsext_status_type != -1) |
338 | ssl2_compat = 0; | |
761772d7 BM |
339 | #ifdef TLSEXT_TYPE_opaque_prf_input |
340 | if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL) | |
341 | ssl2_compat = 0; | |
342 | #endif | |
a9e1c50b BL |
343 | if (s->ctx->tlsext_authz_server_audit_proof_cb != NULL) |
344 | ssl2_compat = 0; | |
761772d7 | 345 | } |
0702150f | 346 | #endif |
761772d7 | 347 | |
d02b48c6 RE |
348 | buf=(unsigned char *)s->init_buf->data; |
349 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) | |
350 | { | |
351 | #if 0 | |
352 | /* don't reuse session-id's */ | |
353 | if (!ssl_get_new_session(s,0)) | |
354 | { | |
355 | return(-1); | |
356 | } | |
357 | #endif | |
358 | ||
359 | p=s->s3->client_random; | |
7bbcb2f6 | 360 | Time=(unsigned long)time(NULL); /* Time */ |
c6c2e313 BM |
361 | l2n(Time,p); |
362 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) | |
7c7667b8 | 363 | return -1; |
d02b48c6 | 364 | |
7409d7ad DSH |
365 | if (version == TLS1_2_VERSION) |
366 | { | |
367 | version_major = TLS1_2_VERSION_MAJOR; | |
368 | version_minor = TLS1_2_VERSION_MINOR; | |
369 | } | |
2ea80354 DSH |
370 | else if (tls1_suiteb(s)) |
371 | { | |
372 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
373 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
374 | return -1; | |
375 | } | |
7409d7ad | 376 | else if (version == TLS1_1_VERSION) |
637f374a DSH |
377 | { |
378 | version_major = TLS1_1_VERSION_MAJOR; | |
379 | version_minor = TLS1_1_VERSION_MINOR; | |
380 | } | |
381 | else if (version == TLS1_VERSION) | |
58964a49 | 382 | { |
c6c2e313 BM |
383 | version_major = TLS1_VERSION_MAJOR; |
384 | version_minor = TLS1_VERSION_MINOR; | |
58964a49 | 385 | } |
086e32a6 DSH |
386 | #ifdef OPENSSL_FIPS |
387 | else if(FIPS_mode()) | |
388 | { | |
389 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
390 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
391 | return -1; | |
392 | } | |
393 | #endif | |
c6c2e313 | 394 | else if (version == SSL3_VERSION) |
58964a49 | 395 | { |
c6c2e313 BM |
396 | version_major = SSL3_VERSION_MAJOR; |
397 | version_minor = SSL3_VERSION_MINOR; | |
58964a49 | 398 | } |
c6c2e313 | 399 | else if (version == SSL2_VERSION) |
58964a49 | 400 | { |
c6c2e313 BM |
401 | version_major = SSL2_VERSION_MAJOR; |
402 | version_minor = SSL2_VERSION_MINOR; | |
58964a49 RE |
403 | } |
404 | else | |
405 | { | |
406 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); | |
407 | return(-1); | |
408 | } | |
d02b48c6 | 409 | |
c6c2e313 | 410 | s->client_version = version; |
d02b48c6 | 411 | |
c6c2e313 BM |
412 | if (ssl2_compat) |
413 | { | |
414 | /* create SSL 2.0 compatible Client Hello */ | |
415 | ||
416 | /* two byte record header will be written last */ | |
417 | d = &(buf[2]); | |
418 | p = d + 9; /* leave space for message type, version, individual length fields */ | |
419 | ||
420 | *(d++) = SSL2_MT_CLIENT_HELLO; | |
421 | *(d++) = version_major; | |
422 | *(d++) = version_minor; | |
423 | ||
424 | /* Ciphers supported */ | |
425 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); | |
426 | if (i == 0) | |
427 | { | |
428 | /* no ciphers */ | |
429 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
430 | return -1; | |
431 | } | |
432 | s2n(i,d); | |
433 | p+=i; | |
434 | ||
435 | /* put in the session-id length (zero since there is no reuse) */ | |
d02b48c6 | 436 | #if 0 |
c6c2e313 | 437 | s->session->session_id_length=0; |
d02b48c6 | 438 | #endif |
c6c2e313 BM |
439 | s2n(0,d); |
440 | ||
441 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
442 | ch_len=SSL2_CHALLENGE_LENGTH; | |
443 | else | |
444 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
445 | ||
446 | /* write out sslv2 challenge */ | |
d41c785d BL |
447 | /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), |
448 | because it is one of SSL2_MAX_CHALLENGE_LENGTH (32) | |
449 | or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the | |
450 | check in for futurproofing */ | |
c6c2e313 BM |
451 | if (SSL3_RANDOM_SIZE < ch_len) |
452 | i=SSL3_RANDOM_SIZE; | |
453 | else | |
454 | i=ch_len; | |
455 | s2n(i,d); | |
456 | memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); | |
457 | if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) | |
458 | return -1; | |
459 | ||
460 | memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
461 | p+=i; | |
462 | ||
463 | i= p- &(buf[2]); | |
464 | buf[0]=((i>>8)&0xff)|0x80; | |
465 | buf[1]=(i&0xff); | |
466 | ||
467 | /* number of bytes to write */ | |
468 | s->init_num=i+2; | |
469 | s->init_off=0; | |
470 | ||
471 | ssl3_finish_mac(s,&(buf[2]),i); | |
472 | } | |
d02b48c6 | 473 | else |
c6c2e313 BM |
474 | { |
475 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
d02b48c6 | 476 | |
c6c2e313 BM |
477 | /* do the record header (5 bytes) and handshake message header (4 bytes) last */ |
478 | d = p = &(buf[9]); | |
479 | ||
480 | *(p++) = version_major; | |
481 | *(p++) = version_minor; | |
482 | ||
483 | /* Random stuff */ | |
484 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
485 | p += SSL3_RANDOM_SIZE; | |
486 | ||
487 | /* Session ID (zero since there is no reuse) */ | |
488 | *(p++) = 0; | |
489 | ||
490 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
491 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); | |
492 | if (i == 0) | |
493 | { | |
494 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
495 | return -1; | |
496 | } | |
800e1cd9 DSH |
497 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
498 | /* Some servers hang if client hello > 256 bytes | |
499 | * as hack workaround chop number of supported ciphers | |
500 | * to keep it well below this if we use TLS v1.2 | |
501 | */ | |
502 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
503 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
504 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
505 | #endif | |
c6c2e313 BM |
506 | s2n(i,p); |
507 | p+=i; | |
508 | ||
509 | /* COMPRESSION */ | |
ed3883d2 BM |
510 | #ifdef OPENSSL_NO_COMP |
511 | *(p++)=1; | |
512 | #else | |
566dda07 DSH |
513 | if ((s->options & SSL_OP_NO_COMPRESSION) |
514 | || !s->ctx->comp_methods) | |
c6c2e313 BM |
515 | j=0; |
516 | else | |
517 | j=sk_SSL_COMP_num(s->ctx->comp_methods); | |
518 | *(p++)=1+j; | |
519 | for (i=0; i<j; i++) | |
520 | { | |
521 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); | |
522 | *(p++)=comp->id; | |
523 | } | |
ed3883d2 | 524 | #endif |
c6c2e313 | 525 | *(p++)=0; /* Add the NULL method */ |
f1fd4544 | 526 | |
ed3883d2 | 527 | #ifndef OPENSSL_NO_TLSEXT |
761772d7 BM |
528 | /* TLS extensions*/ |
529 | if (ssl_prepare_clienthello_tlsext(s) <= 0) | |
530 | { | |
531 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); | |
532 | return -1; | |
533 | } | |
f1fd4544 BM |
534 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
535 | { | |
739a543e | 536 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); |
ed3883d2 | 537 | return -1; |
f1fd4544 | 538 | } |
ed3883d2 | 539 | #endif |
c6c2e313 BM |
540 | |
541 | l = p-d; | |
7c7667b8 | 542 | |
c6c2e313 BM |
543 | /* fill in 4-byte handshake header */ |
544 | d=&(buf[5]); | |
545 | *(d++)=SSL3_MT_CLIENT_HELLO; | |
546 | l2n3(l,d); | |
d02b48c6 | 547 | |
c6c2e313 BM |
548 | l += 4; |
549 | ||
550 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) | |
551 | { | |
552 | SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); | |
553 | return -1; | |
554 | } | |
555 | ||
556 | /* fill in 5-byte record header */ | |
557 | d=buf; | |
558 | *(d++) = SSL3_RT_HANDSHAKE; | |
559 | *(d++) = version_major; | |
293706e7 DSH |
560 | /* Some servers hang if we use long client hellos |
561 | * and a record number > TLS 1.0. | |
562 | */ | |
563 | if (TLS1_get_client_version(s) > TLS1_VERSION) | |
564 | *(d++) = 1; | |
565 | else | |
566 | *(d++) = version_minor; | |
c6c2e313 BM |
567 | s2n((int)l,d); |
568 | ||
569 | /* number of bytes to write */ | |
570 | s->init_num=p-buf; | |
571 | s->init_off=0; | |
572 | ||
573 | ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); | |
574 | } | |
d02b48c6 RE |
575 | |
576 | s->state=SSL23_ST_CW_CLNT_HELLO_B; | |
d02b48c6 | 577 | s->init_off=0; |
d02b48c6 RE |
578 | } |
579 | ||
580 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
cf82191d | 581 | ret = ssl23_write_bytes(s); |
c6c2e313 BM |
582 | |
583 | if ((ret >= 2) && s->msg_callback) | |
584 | { | |
585 | /* Client Hello has been sent; tell msg_callback */ | |
586 | ||
587 | if (ssl2_compat) | |
3f19bbf4 | 588 | s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); |
c6c2e313 BM |
589 | else |
590 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); | |
591 | } | |
592 | ||
cf82191d | 593 | return ret; |
d02b48c6 RE |
594 | } |
595 | ||
6b691a5c | 596 | static int ssl23_get_server_hello(SSL *s) |
d02b48c6 RE |
597 | { |
598 | char buf[8]; | |
599 | unsigned char *p; | |
aa82db4f | 600 | int i; |
d02b48c6 | 601 | int n; |
d02b48c6 RE |
602 | |
603 | n=ssl23_read_bytes(s,7); | |
604 | ||
605 | if (n != 7) return(n); | |
606 | p=s->packet; | |
607 | ||
608 | memcpy(buf,p,n); | |
609 | ||
610 | if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && | |
611 | (p[5] == 0x00) && (p[6] == 0x02)) | |
612 | { | |
bc36ee62 | 613 | #ifdef OPENSSL_NO_SSL2 |
aa82db4f UM |
614 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); |
615 | goto err; | |
616 | #else | |
d02b48c6 RE |
617 | /* we are talking sslv2 */ |
618 | /* we need to clean up the SSLv3 setup and put in the | |
619 | * sslv2 stuff. */ | |
aa82db4f | 620 | int ch_len; |
d02b48c6 | 621 | |
58964a49 RE |
622 | if (s->options & SSL_OP_NO_SSLv2) |
623 | { | |
624 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
625 | goto err; | |
626 | } | |
d02b48c6 RE |
627 | if (s->s2 == NULL) |
628 | { | |
629 | if (!ssl2_new(s)) | |
630 | goto err; | |
631 | } | |
632 | else | |
633 | ssl2_clear(s); | |
634 | ||
58964a49 | 635 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) |
d02b48c6 RE |
636 | ch_len=SSL2_CHALLENGE_LENGTH; |
637 | else | |
638 | ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
639 | ||
640 | /* write out sslv2 challenge */ | |
d41c785d BL |
641 | /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because |
642 | it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or | |
643 | SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for | |
644 | futurproofing */ | |
d02b48c6 RE |
645 | i=(SSL3_RANDOM_SIZE < ch_len) |
646 | ?SSL3_RANDOM_SIZE:ch_len; | |
647 | s->s2->challenge_length=i; | |
648 | memcpy(s->s2->challenge, | |
649 | &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
650 | ||
651 | if (s->s3 != NULL) ssl3_free(s); | |
652 | ||
54a656ef | 653 | if (!BUF_MEM_grow_clean(s->init_buf, |
d02b48c6 RE |
654 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) |
655 | { | |
656 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); | |
657 | goto err; | |
658 | } | |
659 | ||
660 | s->state=SSL2_ST_GET_SERVER_HELLO_A; | |
37569e64 | 661 | if (!(s->client_version == SSL2_VERSION)) |
aa826d88 | 662 | /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */ |
37569e64 | 663 | s->s2->ssl2_rollback=1; |
d02b48c6 | 664 | |
6ad47e83 | 665 | /* setup the 7 bytes we have read so we get them from |
d02b48c6 RE |
666 | * the sslv2 buffer */ |
667 | s->rstate=SSL_ST_READ_HEADER; | |
668 | s->packet_length=n; | |
669 | s->packet= &(s->s2->rbuf[0]); | |
670 | memcpy(s->packet,buf,n); | |
671 | s->s2->rbuf_left=n; | |
672 | s->s2->rbuf_offs=0; | |
673 | ||
674 | /* we have already written one */ | |
675 | s->s2->write_sequence=1; | |
676 | ||
677 | s->method=SSLv2_client_method(); | |
678 | s->handshake_func=s->method->ssl_connect; | |
aa82db4f | 679 | #endif |
d02b48c6 | 680 | } |
6ad47e83 | 681 | else if (p[1] == SSL3_VERSION_MAJOR && |
7409d7ad | 682 | p[2] <= TLS1_2_VERSION_MINOR && |
6ad47e83 BM |
683 | ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || |
684 | (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) | |
d02b48c6 | 685 | { |
6ad47e83 | 686 | /* we have sslv3 or tls1 (server hello or alert) */ |
d02b48c6 | 687 | |
58964a49 RE |
688 | if ((p[2] == SSL3_VERSION_MINOR) && |
689 | !(s->options & SSL_OP_NO_SSLv3)) | |
690 | { | |
086e32a6 DSH |
691 | #ifdef OPENSSL_FIPS |
692 | if(FIPS_mode()) | |
693 | { | |
694 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
695 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
696 | goto err; | |
697 | } | |
698 | #endif | |
58964a49 RE |
699 | s->version=SSL3_VERSION; |
700 | s->method=SSLv3_client_method(); | |
701 | } | |
702 | else if ((p[2] == TLS1_VERSION_MINOR) && | |
703 | !(s->options & SSL_OP_NO_TLSv1)) | |
704 | { | |
705 | s->version=TLS1_VERSION; | |
706 | s->method=TLSv1_client_method(); | |
707 | } | |
637f374a DSH |
708 | else if ((p[2] == TLS1_1_VERSION_MINOR) && |
709 | !(s->options & SSL_OP_NO_TLSv1_1)) | |
710 | { | |
711 | s->version=TLS1_1_VERSION; | |
712 | s->method=TLSv1_1_client_method(); | |
713 | } | |
7409d7ad DSH |
714 | else if ((p[2] == TLS1_2_VERSION_MINOR) && |
715 | !(s->options & SSL_OP_NO_TLSv1_2)) | |
716 | { | |
717 | s->version=TLS1_2_VERSION; | |
718 | s->method=TLSv1_2_client_method(); | |
719 | } | |
58964a49 RE |
720 | else |
721 | { | |
722 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
723 | goto err; | |
724 | } | |
6ad47e83 BM |
725 | |
726 | if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) | |
d02b48c6 | 727 | { |
6ad47e83 BM |
728 | /* fatal alert */ |
729 | ||
730 | void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
731 | int j; | |
732 | ||
733 | if (s->info_callback != NULL) | |
734 | cb=s->info_callback; | |
735 | else if (s->ctx->info_callback != NULL) | |
736 | cb=s->ctx->info_callback; | |
737 | ||
738 | i=p[5]; | |
739 | if (cb != NULL) | |
740 | { | |
741 | j=(i<<8)|p[6]; | |
742 | cb(s,SSL_CB_READ_ALERT,j); | |
743 | } | |
744 | ||
745 | if (s->msg_callback) | |
746 | s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg); | |
747 | ||
748 | s->rwstate=SSL_NOTHING; | |
749 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]); | |
750 | goto err; | |
d02b48c6 RE |
751 | } |
752 | ||
6ad47e83 | 753 | if (!ssl_init_wbio_buffer(s,1)) goto err; |
241520e6 | 754 | |
6ad47e83 BM |
755 | /* we are in this state */ |
756 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
757 | ||
758 | /* put the 7 bytes we have read into the input buffer | |
759 | * for SSLv3 */ | |
760 | s->rstate=SSL_ST_READ_HEADER; | |
761 | s->packet_length=n; | |
8671b898 BL |
762 | if (s->s3->rbuf.buf == NULL) |
763 | if (!ssl3_setup_read_buffer(s)) | |
764 | goto err; | |
6ad47e83 BM |
765 | s->packet= &(s->s3->rbuf.buf[0]); |
766 | memcpy(s->packet,buf,n); | |
767 | s->s3->rbuf.left=n; | |
768 | s->s3->rbuf.offset=0; | |
769 | ||
770 | s->handshake_func=s->method->ssl_connect; | |
d02b48c6 RE |
771 | } |
772 | else | |
773 | { | |
774 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
775 | goto err; | |
776 | } | |
777 | s->init_num=0; | |
778 | ||
779 | /* Since, if we are sending a ssl23 client hello, we are not | |
780 | * reusing a session-id */ | |
781 | if (!ssl_get_new_session(s,0)) | |
782 | goto err; | |
783 | ||
d02b48c6 RE |
784 | return(SSL_connect(s)); |
785 | err: | |
786 | return(-1); | |
787 | } |