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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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
f1fd4544 BM |
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) |
0f113f3e | 123 | { |
62f45cc2 | 124 | #ifndef OPENSSL_NO_SSL3 |
0f113f3e MC |
125 | if (ver == SSL3_VERSION) |
126 | return (SSLv3_client_method()); | |
62f45cc2 | 127 | #endif |
0f113f3e MC |
128 | if (ver == TLS1_VERSION) |
129 | return (TLSv1_client_method()); | |
130 | else if (ver == TLS1_1_VERSION) | |
131 | return (TLSv1_1_client_method()); | |
132 | else if (ver == TLS1_2_VERSION) | |
133 | return (TLSv1_2_client_method()); | |
134 | else | |
135 | return (NULL); | |
136 | } | |
d02b48c6 | 137 | |
f3b656b2 | 138 | IMPLEMENT_ssl23_meth_func(SSLv23_client_method, |
0f113f3e MC |
139 | ssl_undefined_function, |
140 | ssl23_connect, ssl23_get_client_method) | |
d02b48c6 | 141 | |
6b691a5c | 142 | int ssl23_connect(SSL *s) |
0f113f3e MC |
143 | { |
144 | BUF_MEM *buf = NULL; | |
145 | unsigned long Time = (unsigned long)time(NULL); | |
146 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
147 | int ret = -1; | |
148 | int new_state, state; | |
149 | ||
150 | RAND_add(&Time, sizeof(Time), 0); | |
151 | ERR_clear_error(); | |
152 | clear_sys_error(); | |
153 | ||
154 | if (s->info_callback != NULL) | |
155 | cb = s->info_callback; | |
156 | else if (s->ctx->info_callback != NULL) | |
157 | cb = s->ctx->info_callback; | |
158 | ||
159 | s->in_handshake++; | |
69f68237 | 160 | if (!SSL_in_init(s) || SSL_in_before(s)) { |
61986d32 | 161 | if (!SSL_clear(s)) |
69f68237 MC |
162 | return -1; |
163 | } | |
0f113f3e MC |
164 | |
165 | for (;;) { | |
166 | state = s->state; | |
167 | ||
168 | switch (s->state) { | |
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 | ||
174 | if (s->session != NULL) { | |
175 | SSLerr(SSL_F_SSL23_CONNECT, | |
176 | SSL_R_SSL23_DOING_SESSION_ID_REUSE); | |
177 | ret = -1; | |
178 | goto end; | |
179 | } | |
180 | s->server = 0; | |
181 | if (cb != NULL) | |
182 | cb(s, SSL_CB_HANDSHAKE_START, 1); | |
183 | ||
184 | /* s->version=TLS1_VERSION; */ | |
185 | s->type = SSL_ST_CONNECT; | |
186 | ||
187 | if (s->init_buf == NULL) { | |
188 | if ((buf = BUF_MEM_new()) == NULL) { | |
189 | ret = -1; | |
190 | goto end; | |
191 | } | |
192 | if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { | |
193 | ret = -1; | |
194 | goto end; | |
195 | } | |
196 | s->init_buf = buf; | |
197 | buf = NULL; | |
198 | } | |
199 | ||
200 | if (!ssl3_setup_buffers(s)) { | |
201 | ret = -1; | |
202 | goto end; | |
203 | } | |
204 | ||
205 | ssl3_init_finished_mac(s); | |
206 | ||
207 | s->state = SSL23_ST_CW_CLNT_HELLO_A; | |
208 | s->ctx->stats.sess_connect++; | |
209 | s->init_num = 0; | |
210 | break; | |
211 | ||
212 | case SSL23_ST_CW_CLNT_HELLO_A: | |
213 | case SSL23_ST_CW_CLNT_HELLO_B: | |
214 | ||
215 | s->shutdown = 0; | |
216 | ret = ssl23_client_hello(s); | |
217 | if (ret <= 0) | |
218 | 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) | |
228 | cb = NULL; | |
229 | goto end; | |
230 | /* break; */ | |
231 | ||
232 | default: | |
233 | SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE); | |
234 | ret = -1; | |
235 | goto end; | |
236 | /* break; */ | |
237 | } | |
238 | ||
239 | if (s->debug) { | |
240 | (void)BIO_flush(s->wbio); | |
241 | } | |
242 | ||
243 | if ((cb != NULL) && (s->state != state)) { | |
244 | new_state = s->state; | |
245 | s->state = state; | |
246 | cb(s, SSL_CB_CONNECT_LOOP, 1); | |
247 | s->state = new_state; | |
248 | } | |
249 | } | |
250 | end: | |
251 | s->in_handshake--; | |
252 | if (buf != NULL) | |
253 | BUF_MEM_free(buf); | |
254 | if (cb != NULL) | |
255 | cb(s, SSL_CB_CONNECT_EXIT, ret); | |
256 | return (ret); | |
257 | } | |
258 | ||
259 | /* | |
260 | * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on | |
261 | * failure, 1 on success. | |
262 | */ | |
2016265d | 263 | int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len) |
0f113f3e MC |
264 | { |
265 | int send_time = 0; | |
266483d2 | 266 | |
0f113f3e MC |
267 | if (len < 4) |
268 | return 0; | |
269 | if (server) | |
270 | send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0; | |
271 | else | |
272 | send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0; | |
273 | if (send_time) { | |
274 | unsigned long Time = (unsigned long)time(NULL); | |
275 | unsigned char *p = result; | |
276 | l2n(Time, p); | |
266483d2 | 277 | return RAND_bytes(p, len - 4); |
0f113f3e | 278 | } else |
266483d2 | 279 | return RAND_bytes(result, len); |
0f113f3e | 280 | } |
2016265d | 281 | |
6b691a5c | 282 | static int ssl23_client_hello(SSL *s) |
0f113f3e MC |
283 | { |
284 | unsigned char *buf; | |
285 | unsigned char *p, *d; | |
286 | int i; | |
287 | unsigned long l; | |
288 | int version = 0, version_major, version_minor; | |
289 | int al = 0; | |
f10f4447 | 290 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
291 | int j; |
292 | SSL_COMP *comp; | |
f10f4447 | 293 | #endif |
0f113f3e MC |
294 | int ret; |
295 | unsigned long mask, options = s->options; | |
296 | ||
297 | /* | |
298 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
299 | * some protocols below X enabled. This is required in order | |
300 | * to maintain "version capability" vector contiguous. So | |
301 | * that if application wants to disable TLS1.0 in favour of | |
302 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
303 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. | |
304 | */ | |
305 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
f2ad3582 | 306 | #if !defined(OPENSSL_NO_SSL3) |
0f113f3e | 307 | | SSL_OP_NO_SSLv3 |
f2ad3582 | 308 | #endif |
0f113f3e | 309 | ; |
f2ad3582 | 310 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) |
0f113f3e | 311 | version = TLS1_2_VERSION; |
f2ad3582 | 312 | |
0f113f3e MC |
313 | if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) |
314 | version = TLS1_1_VERSION; | |
f2ad3582 | 315 | #else |
0f113f3e | 316 | version = TLS1_1_VERSION; |
f2ad3582 | 317 | #endif |
0f113f3e MC |
318 | mask &= ~SSL_OP_NO_TLSv1_1; |
319 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
320 | version = TLS1_VERSION; | |
321 | mask &= ~SSL_OP_NO_TLSv1; | |
f2ad3582 | 322 | #if !defined(OPENSSL_NO_SSL3) |
0f113f3e MC |
323 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) |
324 | version = SSL3_VERSION; | |
325 | mask &= ~SSL_OP_NO_SSLv3; | |
f2ad3582 | 326 | #endif |
761772d7 | 327 | |
0f113f3e MC |
328 | buf = (unsigned char *)s->init_buf->data; |
329 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { | |
0f113f3e MC |
330 | p = s->s3->client_random; |
331 | if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) | |
332 | return -1; | |
333 | ||
334 | if (version == TLS1_2_VERSION) { | |
335 | version_major = TLS1_2_VERSION_MAJOR; | |
336 | version_minor = TLS1_2_VERSION_MINOR; | |
337 | } else if (tls1_suiteb(s)) { | |
338 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
339 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
340 | return -1; | |
341 | } else if (version == TLS1_1_VERSION) { | |
342 | version_major = TLS1_1_VERSION_MAJOR; | |
343 | version_minor = TLS1_1_VERSION_MINOR; | |
344 | } else if (version == TLS1_VERSION) { | |
345 | version_major = TLS1_VERSION_MAJOR; | |
346 | version_minor = TLS1_VERSION_MINOR; | |
347 | } else if (FIPS_mode()) { | |
348 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
349 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
350 | return -1; | |
351 | } else if (version == SSL3_VERSION) { | |
352 | version_major = SSL3_VERSION_MAJOR; | |
353 | version_minor = SSL3_VERSION_MINOR; | |
354 | } else { | |
355 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
356 | return (-1); | |
357 | } | |
358 | ||
359 | s->client_version = version; | |
360 | ||
361 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
362 | ||
363 | /* | |
364 | * do the record header (5 bytes) and handshake message header (4 | |
365 | * bytes) last | |
366 | */ | |
367 | d = p = &(buf[9]); | |
368 | ||
369 | *(p++) = version_major; | |
370 | *(p++) = version_minor; | |
371 | ||
372 | /* Random stuff */ | |
373 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
374 | p += SSL3_RANDOM_SIZE; | |
375 | ||
376 | /* Session ID (zero since there is no reuse) */ | |
377 | *(p++) = 0; | |
378 | ||
379 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
380 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), | |
381 | ssl3_put_cipher_by_char); | |
382 | if (i == 0) { | |
383 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
384 | return -1; | |
385 | } | |
800e1cd9 | 386 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
0f113f3e MC |
387 | /* |
388 | * Some servers hang if client hello > 256 bytes as hack workaround | |
389 | * chop number of supported ciphers to keep it well below this if we | |
390 | * use TLS v1.2 | |
391 | */ | |
392 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
393 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
394 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
800e1cd9 | 395 | #endif |
0f113f3e MC |
396 | s2n(i, p); |
397 | p += i; | |
c6c2e313 | 398 | |
0f113f3e | 399 | /* COMPRESSION */ |
ed3883d2 | 400 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 401 | *(p++) = 1; |
ed3883d2 | 402 | #else |
0f113f3e MC |
403 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
404 | j = 0; | |
405 | else | |
406 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
407 | *(p++) = 1 + j; | |
408 | for (i = 0; i < j; i++) { | |
409 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
410 | *(p++) = comp->id; | |
411 | } | |
ed3883d2 | 412 | #endif |
0f113f3e | 413 | *(p++) = 0; /* Add the NULL method */ |
f1fd4544 | 414 | |
ed3883d2 | 415 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
416 | /* TLS extensions */ |
417 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
418 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
419 | return -1; | |
420 | } | |
421 | if ((p = | |
422 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
423 | &al)) == NULL) { | |
424 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
425 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
426 | return -1; | |
427 | } | |
ed3883d2 | 428 | #endif |
0f113f3e MC |
429 | |
430 | l = p - d; | |
431 | ||
432 | /* fill in 4-byte handshake header */ | |
433 | d = &(buf[5]); | |
434 | *(d++) = SSL3_MT_CLIENT_HELLO; | |
435 | l2n3(l, d); | |
436 | ||
437 | l += 4; | |
438 | ||
439 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) { | |
440 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
441 | return -1; | |
442 | } | |
443 | ||
444 | /* fill in 5-byte record header */ | |
445 | d = buf; | |
446 | *(d++) = SSL3_RT_HANDSHAKE; | |
447 | *(d++) = version_major; | |
448 | /* | |
449 | * Some servers hang if we use long client hellos and a record number | |
450 | * > TLS 1.0. | |
451 | */ | |
452 | if (TLS1_get_client_version(s) > TLS1_VERSION) | |
453 | *(d++) = 1; | |
454 | else | |
455 | *(d++) = version_minor; | |
456 | s2n((int)l, d); | |
457 | ||
458 | /* number of bytes to write */ | |
459 | s->init_num = p - buf; | |
460 | s->init_off = 0; | |
461 | ||
462 | ssl3_finish_mac(s, &(buf[5]), s->init_num - 5); | |
463 | ||
464 | s->state = SSL23_ST_CW_CLNT_HELLO_B; | |
465 | s->init_off = 0; | |
466 | } | |
467 | ||
468 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
469 | ret = ssl23_write_bytes(s); | |
470 | ||
471 | if ((ret >= 2) && s->msg_callback) { | |
472 | /* Client Hello has been sent; tell msg_callback */ | |
473 | s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, | |
474 | s->msg_callback_arg); | |
475 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data + 5, | |
476 | ret - 5, s, s->msg_callback_arg); | |
477 | } | |
478 | ||
479 | return ret; | |
480 | } | |
d02b48c6 | 481 | |
6b691a5c | 482 | static int ssl23_get_server_hello(SSL *s) |
0f113f3e | 483 | { |
28d59af8 | 484 | unsigned char buf[8]; |
0f113f3e MC |
485 | unsigned char *p; |
486 | int i; | |
487 | int n; | |
d02b48c6 | 488 | |
0f113f3e | 489 | n = ssl23_read_bytes(s, 7); |
d02b48c6 | 490 | |
0f113f3e MC |
491 | if (n != 7) |
492 | return (n); | |
7a7048af | 493 | p = RECORD_LAYER_get_packet(&s->rlayer); |
d02b48c6 | 494 | |
0f113f3e | 495 | memcpy(buf, p, n); |
d02b48c6 | 496 | |
0f113f3e MC |
497 | if (p[1] == SSL3_VERSION_MAJOR && |
498 | p[2] <= TLS1_2_VERSION_MINOR && | |
499 | ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || | |
500 | (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) { | |
501 | /* we have sslv3 or tls1 (server hello or alert) */ | |
d02b48c6 | 502 | |
62f45cc2 | 503 | #ifndef OPENSSL_NO_SSL3 |
0f113f3e MC |
504 | if ((p[2] == SSL3_VERSION_MINOR) && !(s->options & SSL_OP_NO_SSLv3)) { |
505 | if (FIPS_mode()) { | |
506 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
507 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
508 | goto err; | |
509 | } | |
510 | s->version = SSL3_VERSION; | |
511 | s->method = SSLv3_client_method(); | |
512 | } else | |
62f45cc2 | 513 | #endif |
0f113f3e MC |
514 | if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) { |
515 | s->version = TLS1_VERSION; | |
516 | s->method = TLSv1_client_method(); | |
517 | } else if ((p[2] == TLS1_1_VERSION_MINOR) && | |
518 | !(s->options & SSL_OP_NO_TLSv1_1)) { | |
519 | s->version = TLS1_1_VERSION; | |
520 | s->method = TLSv1_1_client_method(); | |
521 | } else if ((p[2] == TLS1_2_VERSION_MINOR) && | |
522 | !(s->options & SSL_OP_NO_TLSv1_2)) { | |
523 | s->version = TLS1_2_VERSION; | |
524 | s->method = TLSv1_2_client_method(); | |
525 | } else { | |
526 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); | |
527 | goto err; | |
528 | } | |
529 | ||
530 | /* ensure that TLS_MAX_VERSION is up-to-date */ | |
531 | OPENSSL_assert(s->version <= TLS_MAX_VERSION); | |
532 | ||
533 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
534 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); | |
535 | goto err; | |
536 | } | |
537 | ||
538 | if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) { | |
539 | /* fatal alert */ | |
540 | ||
541 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
542 | int j; | |
543 | ||
544 | if (s->info_callback != NULL) | |
545 | cb = s->info_callback; | |
546 | else if (s->ctx->info_callback != NULL) | |
547 | cb = s->ctx->info_callback; | |
548 | ||
549 | i = p[5]; | |
550 | if (cb != NULL) { | |
551 | j = (i << 8) | p[6]; | |
552 | cb(s, SSL_CB_READ_ALERT, j); | |
553 | } | |
554 | ||
555 | if (s->msg_callback) { | |
556 | s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, | |
557 | s->msg_callback_arg); | |
558 | s->msg_callback(0, s->version, SSL3_RT_ALERT, p + 5, 2, s, | |
559 | s->msg_callback_arg); | |
560 | } | |
561 | ||
562 | s->rwstate = SSL_NOTHING; | |
563 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_AD_REASON_OFFSET + p[6]); | |
564 | goto err; | |
565 | } | |
566 | ||
567 | if (!ssl_init_wbio_buffer(s, 1)) | |
568 | goto err; | |
569 | ||
570 | /* we are in this state */ | |
571 | s->state = SSL3_ST_CR_SRVR_HELLO_A; | |
572 | ||
573 | /* | |
574 | * put the 7 bytes we have read into the input buffer for SSLv3 | |
575 | */ | |
61986d32 | 576 | if (!RECORD_LAYER_set_data(&s->rlayer, buf, n)) |
bbcd6d7f | 577 | goto err; |
0f113f3e MC |
578 | |
579 | s->handshake_func = s->method->ssl_connect; | |
580 | } else { | |
581 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL); | |
582 | goto err; | |
583 | } | |
584 | s->init_num = 0; | |
585 | ||
586 | /* | |
587 | * Since, if we are sending a ssl23 client hello, we are not reusing a | |
588 | * session-id | |
589 | */ | |
590 | if (!ssl_get_new_session(s, 0)) | |
591 | goto err; | |
592 | ||
593 | return (SSL_connect(s)); | |
594 | err: | |
595 | return (-1); | |
596 | } |