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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. | |
40720ce3 | 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). | |
40720ce3 | 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. | |
40720ce3 | 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 :-). | |
40720ce3 | 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)" | |
40720ce3 | 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. | |
40720ce3 | 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 | */ | |
58 | ||
59 | #include <stdio.h> | |
7b63c0fa | 60 | #include "ssl_locl.h" |
ec577822 BM |
61 | #include <openssl/buffer.h> |
62 | #include <openssl/rand.h> | |
63 | #include <openssl/objects.h> | |
64 | #include <openssl/evp.h> | |
d02b48c6 | 65 | |
9b3086fe | 66 | static SSL_METHOD *ssl23_get_client_method(int ver); |
d02b48c6 RE |
67 | static int ssl23_client_hello(SSL *s); |
68 | static int ssl23_get_server_hello(SSL *s); | |
6b691a5c | 69 | static SSL_METHOD *ssl23_get_client_method(int ver) |
40720ce3 | 70 | { |
bc36ee62 | 71 | #ifndef OPENSSL_NO_SSL2 |
40720ce3 MC |
72 | if (ver == SSL2_VERSION) |
73 | return (SSLv2_client_method()); | |
aa82db4f | 74 | #endif |
cd332a07 | 75 | #ifndef OPENSSL_NO_SSL3 |
40720ce3 MC |
76 | if (ver == SSL3_VERSION) |
77 | return (SSLv3_client_method()); | |
cd332a07 | 78 | #endif |
40720ce3 MC |
79 | if (ver == TLS1_VERSION) |
80 | return (TLSv1_client_method()); | |
81 | else | |
82 | return (NULL); | |
83 | } | |
d02b48c6 | 84 | |
222f2246 | 85 | IMPLEMENT_ssl23_meth_func(SSLv23_client_method, |
40720ce3 MC |
86 | ssl_undefined_function, |
87 | ssl23_connect, ssl23_get_client_method) | |
d02b48c6 | 88 | |
6b691a5c | 89 | int ssl23_connect(SSL *s) |
40720ce3 MC |
90 | { |
91 | BUF_MEM *buf = NULL; | |
92 | unsigned long Time = (unsigned long)time(NULL); | |
93 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
94 | int ret = -1; | |
95 | int new_state, state; | |
96 | ||
97 | RAND_add(&Time, sizeof(Time), 0); | |
98 | ERR_clear_error(); | |
99 | clear_sys_error(); | |
100 | ||
101 | if (s->info_callback != NULL) | |
102 | cb = s->info_callback; | |
103 | else if (s->ctx->info_callback != NULL) | |
104 | cb = s->ctx->info_callback; | |
105 | ||
106 | s->in_handshake++; | |
107 | if (!SSL_in_init(s) || SSL_in_before(s)) | |
108 | SSL_clear(s); | |
109 | ||
110 | for (;;) { | |
111 | state = s->state; | |
112 | ||
113 | switch (s->state) { | |
114 | case SSL_ST_BEFORE: | |
115 | case SSL_ST_CONNECT: | |
116 | case SSL_ST_BEFORE | SSL_ST_CONNECT: | |
117 | case SSL_ST_OK | SSL_ST_CONNECT: | |
118 | ||
119 | if (s->session != NULL) { | |
120 | SSLerr(SSL_F_SSL23_CONNECT, | |
121 | SSL_R_SSL23_DOING_SESSION_ID_REUSE); | |
122 | ret = -1; | |
123 | goto end; | |
124 | } | |
125 | s->server = 0; | |
126 | if (cb != NULL) | |
127 | cb(s, SSL_CB_HANDSHAKE_START, 1); | |
128 | ||
129 | /* s->version=TLS1_VERSION; */ | |
130 | s->type = SSL_ST_CONNECT; | |
131 | ||
132 | if (s->init_buf == NULL) { | |
133 | if ((buf = BUF_MEM_new()) == NULL) { | |
134 | ret = -1; | |
135 | goto end; | |
136 | } | |
137 | if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { | |
138 | ret = -1; | |
139 | goto end; | |
140 | } | |
141 | s->init_buf = buf; | |
142 | buf = NULL; | |
143 | } | |
144 | ||
145 | if (!ssl3_setup_buffers(s)) { | |
146 | ret = -1; | |
147 | goto end; | |
148 | } | |
149 | ||
150 | ssl3_init_finished_mac(s); | |
151 | ||
152 | s->state = SSL23_ST_CW_CLNT_HELLO_A; | |
153 | s->ctx->stats.sess_connect++; | |
154 | s->init_num = 0; | |
155 | break; | |
156 | ||
157 | case SSL23_ST_CW_CLNT_HELLO_A: | |
158 | case SSL23_ST_CW_CLNT_HELLO_B: | |
159 | ||
160 | s->shutdown = 0; | |
161 | ret = ssl23_client_hello(s); | |
162 | if (ret <= 0) | |
163 | goto end; | |
164 | s->state = SSL23_ST_CR_SRVR_HELLO_A; | |
165 | s->init_num = 0; | |
166 | ||
167 | break; | |
168 | ||
169 | case SSL23_ST_CR_SRVR_HELLO_A: | |
170 | case SSL23_ST_CR_SRVR_HELLO_B: | |
171 | ret = ssl23_get_server_hello(s); | |
172 | if (ret >= 0) | |
173 | cb = NULL; | |
174 | goto end; | |
175 | /* break; */ | |
176 | ||
177 | default: | |
178 | SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE); | |
179 | ret = -1; | |
180 | goto end; | |
181 | /* break; */ | |
182 | } | |
183 | ||
184 | if (s->debug) { | |
185 | (void)BIO_flush(s->wbio); | |
186 | } | |
187 | ||
188 | if ((cb != NULL) && (s->state != state)) { | |
189 | new_state = s->state; | |
190 | s->state = state; | |
191 | cb(s, SSL_CB_CONNECT_LOOP, 1); | |
192 | s->state = new_state; | |
193 | } | |
194 | } | |
195 | end: | |
196 | s->in_handshake--; | |
197 | if (buf != NULL) | |
198 | BUF_MEM_free(buf); | |
199 | if (cb != NULL) | |
200 | cb(s, SSL_CB_CONNECT_EXIT, ret); | |
201 | return (ret); | |
202 | } | |
d02b48c6 | 203 | |
6b691a5c | 204 | static int ssl23_client_hello(SSL *s) |
40720ce3 MC |
205 | { |
206 | unsigned char *buf; | |
207 | unsigned char *p, *d; | |
208 | int i, ch_len; | |
209 | unsigned long Time, l; | |
210 | int ssl2_compat; | |
211 | int version = 0, version_major, version_minor; | |
17620eec | 212 | #ifndef OPENSSL_NO_COMP |
40720ce3 MC |
213 | int j; |
214 | SSL_COMP *comp; | |
17620eec | 215 | #endif |
40720ce3 MC |
216 | int ret; |
217 | ||
218 | ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1; | |
219 | ||
220 | if (!(s->options & SSL_OP_NO_TLSv1)) { | |
221 | version = TLS1_VERSION; | |
222 | } else if (!(s->options & SSL_OP_NO_SSLv3)) { | |
223 | version = SSL3_VERSION; | |
224 | } else if (!(s->options & SSL_OP_NO_SSLv2)) { | |
225 | version = SSL2_VERSION; | |
226 | } | |
227 | #ifndef OPENSSL_NO_TLSEXT | |
228 | if (version != SSL2_VERSION) { | |
229 | /* | |
230 | * have to disable SSL 2.0 compatibility if we need TLS extensions | |
231 | */ | |
232 | ||
233 | if (s->tlsext_hostname != NULL) | |
234 | ssl2_compat = 0; | |
235 | if (s->tlsext_status_type != -1) | |
236 | ssl2_compat = 0; | |
237 | } | |
3bd1690b | 238 | #endif |
c6c2e313 | 239 | |
40720ce3 MC |
240 | buf = (unsigned char *)s->init_buf->data; |
241 | if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { | |
d02b48c6 | 242 | #if 0 |
40720ce3 MC |
243 | /* don't reuse session-id's */ |
244 | if (!ssl_get_new_session(s, 0)) { | |
245 | return (-1); | |
246 | } | |
d02b48c6 RE |
247 | #endif |
248 | ||
40720ce3 MC |
249 | p = s->s3->client_random; |
250 | Time = (unsigned long)time(NULL); /* Time */ | |
251 | l2n(Time, p); | |
252 | if (RAND_pseudo_bytes(p, SSL3_RANDOM_SIZE - 4) <= 0) | |
253 | return -1; | |
254 | ||
255 | if (version == TLS1_VERSION) { | |
256 | version_major = TLS1_VERSION_MAJOR; | |
257 | version_minor = TLS1_VERSION_MINOR; | |
258 | } | |
14748adb | 259 | #ifdef OPENSSL_FIPS |
40720ce3 MC |
260 | else if (FIPS_mode()) { |
261 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
262 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
263 | return -1; | |
264 | } | |
14748adb | 265 | #endif |
40720ce3 MC |
266 | else if (version == SSL3_VERSION) { |
267 | version_major = SSL3_VERSION_MAJOR; | |
268 | version_minor = SSL3_VERSION_MINOR; | |
269 | } else if (version == SSL2_VERSION) { | |
270 | version_major = SSL2_VERSION_MAJOR; | |
271 | version_minor = SSL2_VERSION_MINOR; | |
272 | } else { | |
273 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
274 | return (-1); | |
275 | } | |
276 | ||
277 | s->client_version = version; | |
278 | ||
279 | if (ssl2_compat) { | |
280 | /* create SSL 2.0 compatible Client Hello */ | |
281 | ||
282 | /* two byte record header will be written last */ | |
283 | d = &(buf[2]); | |
284 | p = d + 9; /* leave space for message type, version, | |
285 | * individual length fields */ | |
286 | ||
287 | *(d++) = SSL2_MT_CLIENT_HELLO; | |
288 | *(d++) = version_major; | |
289 | *(d++) = version_minor; | |
290 | ||
291 | /* Ciphers supported */ | |
292 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), p, 0); | |
293 | if (i == 0) { | |
294 | /* no ciphers */ | |
295 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
296 | return -1; | |
297 | } | |
298 | s2n(i, d); | |
299 | p += i; | |
300 | ||
301 | /* | |
302 | * put in the session-id length (zero since there is no reuse) | |
303 | */ | |
d02b48c6 | 304 | #if 0 |
40720ce3 | 305 | s->session->session_id_length = 0; |
d02b48c6 | 306 | #endif |
40720ce3 MC |
307 | s2n(0, d); |
308 | ||
309 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
310 | ch_len = SSL2_CHALLENGE_LENGTH; | |
311 | else | |
312 | ch_len = SSL2_MAX_CHALLENGE_LENGTH; | |
313 | ||
314 | /* write out sslv2 challenge */ | |
315 | if (SSL3_RANDOM_SIZE < ch_len) | |
316 | i = SSL3_RANDOM_SIZE; | |
317 | else | |
318 | i = ch_len; | |
319 | s2n(i, d); | |
320 | memset(&(s->s3->client_random[0]), 0, SSL3_RANDOM_SIZE); | |
321 | if (RAND_pseudo_bytes | |
322 | (&(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i) <= 0) | |
323 | return -1; | |
324 | ||
325 | memcpy(p, &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); | |
326 | p += i; | |
327 | ||
328 | i = p - &(buf[2]); | |
329 | buf[0] = ((i >> 8) & 0xff) | 0x80; | |
330 | buf[1] = (i & 0xff); | |
331 | ||
332 | /* number of bytes to write */ | |
333 | s->init_num = i + 2; | |
334 | s->init_off = 0; | |
335 | ||
336 | ssl3_finish_mac(s, &(buf[2]), i); | |
337 | } else { | |
338 | /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
339 | ||
340 | /* | |
341 | * do the record header (5 bytes) and handshake message header (4 | |
342 | * bytes) last | |
343 | */ | |
344 | d = p = &(buf[9]); | |
345 | ||
346 | *(p++) = version_major; | |
347 | *(p++) = version_minor; | |
348 | ||
349 | /* Random stuff */ | |
350 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
351 | p += SSL3_RANDOM_SIZE; | |
352 | ||
353 | /* Session ID (zero since there is no reuse) */ | |
354 | *(p++) = 0; | |
355 | ||
356 | /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
357 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), | |
358 | ssl3_put_cipher_by_char); | |
359 | if (i == 0) { | |
360 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
361 | return -1; | |
362 | } | |
363 | s2n(i, p); | |
364 | p += i; | |
f34e79f2 | 365 | #ifdef OPENSSL_NO_COMP |
40720ce3 | 366 | *(p++) = 1; |
f34e79f2 | 367 | #else |
40720ce3 MC |
368 | /* COMPRESSION */ |
369 | if (s->ctx->comp_methods == NULL) | |
370 | j = 0; | |
371 | else | |
372 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
373 | *(p++) = 1 + j; | |
374 | for (i = 0; i < j; i++) { | |
375 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
376 | *(p++) = comp->id; | |
377 | } | |
f34e79f2 | 378 | #endif |
40720ce3 | 379 | *(p++) = 0; /* Add the NULL method */ |
865a90eb | 380 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 MC |
381 | if ((p = |
382 | ssl_add_clienthello_tlsext(s, p, | |
383 | buf + | |
384 | SSL3_RT_MAX_PLAIN_LENGTH)) == | |
385 | NULL) { | |
386 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
387 | return -1; | |
388 | } | |
865a90eb | 389 | #endif |
40720ce3 MC |
390 | |
391 | l = p - d; | |
392 | *p = 42; | |
393 | ||
394 | /* fill in 4-byte handshake header */ | |
395 | d = &(buf[5]); | |
396 | *(d++) = SSL3_MT_CLIENT_HELLO; | |
397 | l2n3(l, d); | |
398 | ||
399 | l += 4; | |
400 | ||
401 | if (l > SSL3_RT_MAX_PLAIN_LENGTH) { | |
402 | SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
403 | return -1; | |
404 | } | |
405 | ||
406 | /* fill in 5-byte record header */ | |
407 | d = buf; | |
408 | *(d++) = SSL3_RT_HANDSHAKE; | |
409 | *(d++) = version_major; | |
410 | *(d++) = version_minor; /* arguably we should send the *lowest* | |
411 | * suported version here (indicating, | |
412 | * e.g., TLS 1.0 in "SSL 3.0 format") */ | |
413 | s2n((int)l, d); | |
414 | ||
415 | /* number of bytes to write */ | |
416 | s->init_num = p - buf; | |
417 | s->init_off = 0; | |
418 | ||
419 | ssl3_finish_mac(s, &(buf[5]), s->init_num - 5); | |
420 | } | |
421 | ||
422 | s->state = SSL23_ST_CW_CLNT_HELLO_B; | |
423 | s->init_off = 0; | |
424 | } | |
425 | ||
426 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
427 | ret = ssl23_write_bytes(s); | |
428 | ||
429 | if ((ret >= 2) && s->msg_callback) { | |
430 | /* Client Hello has been sent; tell msg_callback */ | |
431 | ||
432 | if (ssl2_compat) | |
433 | s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data + 2, | |
434 | ret - 2, s, s->msg_callback_arg); | |
435 | else | |
436 | s->msg_callback(1, version, SSL3_RT_HANDSHAKE, | |
437 | s->init_buf->data + 5, ret - 5, s, | |
438 | s->msg_callback_arg); | |
439 | } | |
440 | ||
441 | return ret; | |
442 | } | |
d02b48c6 | 443 | |
6b691a5c | 444 | static int ssl23_get_server_hello(SSL *s) |
40720ce3 MC |
445 | { |
446 | char buf[8]; | |
447 | unsigned char *p; | |
448 | int i; | |
449 | int n; | |
d02b48c6 | 450 | |
40720ce3 | 451 | n = ssl23_read_bytes(s, 7); |
d02b48c6 | 452 | |
40720ce3 MC |
453 | if (n != 7) |
454 | return (n); | |
455 | p = s->packet; | |
d02b48c6 | 456 | |
40720ce3 | 457 | memcpy(buf, p, n); |
d02b48c6 | 458 | |
40720ce3 MC |
459 | if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && |
460 | (p[5] == 0x00) && (p[6] == 0x02)) { | |
bc36ee62 | 461 | #ifdef OPENSSL_NO_SSL2 |
40720ce3 MC |
462 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); |
463 | goto err; | |
aa82db4f | 464 | #else |
40720ce3 MC |
465 | /* we are talking sslv2 */ |
466 | /* | |
467 | * we need to clean up the SSLv3 setup and put in the sslv2 stuff. | |
468 | */ | |
469 | int ch_len; | |
470 | ||
471 | if (s->options & SSL_OP_NO_SSLv2) { | |
472 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); | |
473 | goto err; | |
474 | } | |
475 | if (s->s2 == NULL) { | |
476 | if (!ssl2_new(s)) | |
477 | goto err; | |
478 | } else | |
479 | ssl2_clear(s); | |
480 | ||
481 | if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
482 | ch_len = SSL2_CHALLENGE_LENGTH; | |
483 | else | |
484 | ch_len = SSL2_MAX_CHALLENGE_LENGTH; | |
485 | ||
486 | /* write out sslv2 challenge */ | |
487 | i = (SSL3_RANDOM_SIZE < ch_len) | |
488 | ? SSL3_RANDOM_SIZE : ch_len; | |
489 | s->s2->challenge_length = i; | |
490 | memcpy(s->s2->challenge, | |
491 | &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); | |
492 | ||
493 | if (s->s3 != NULL) | |
494 | ssl3_free(s); | |
495 | ||
496 | if (!BUF_MEM_grow_clean(s->init_buf, | |
497 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { | |
498 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, ERR_R_BUF_LIB); | |
499 | goto err; | |
500 | } | |
501 | ||
502 | s->state = SSL2_ST_GET_SERVER_HELLO_A; | |
503 | if (!(s->client_version == SSL2_VERSION)) | |
504 | /* | |
505 | * use special padding (SSL 3.0 draft/RFC 2246, App. E.2) | |
506 | */ | |
507 | s->s2->ssl2_rollback = 1; | |
508 | ||
509 | /* | |
510 | * setup the 7 bytes we have read so we get them from the sslv2 | |
511 | * buffer | |
512 | */ | |
513 | s->rstate = SSL_ST_READ_HEADER; | |
514 | s->packet_length = n; | |
515 | s->packet = &(s->s2->rbuf[0]); | |
516 | memcpy(s->packet, buf, n); | |
517 | s->s2->rbuf_left = n; | |
518 | s->s2->rbuf_offs = 0; | |
519 | ||
520 | /* we have already written one */ | |
521 | s->s2->write_sequence = 1; | |
522 | ||
523 | s->method = SSLv2_client_method(); | |
524 | s->handshake_func = s->method->ssl_connect; | |
aa82db4f | 525 | #endif |
40720ce3 MC |
526 | } else if (p[1] == SSL3_VERSION_MAJOR && |
527 | ((p[2] == SSL3_VERSION_MINOR) || | |
528 | (p[2] == TLS1_VERSION_MINOR)) && | |
529 | ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || | |
530 | (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) { | |
531 | /* we have sslv3 or tls1 (server hello or alert) */ | |
d02b48c6 | 532 | |
cd332a07 | 533 | #ifndef OPENSSL_NO_SSL3 |
40720ce3 MC |
534 | if ((p[2] == SSL3_VERSION_MINOR) && !(s->options & SSL_OP_NO_SSLv3)) { |
535 | # ifdef OPENSSL_FIPS | |
536 | if (FIPS_mode()) { | |
537 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
538 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
539 | goto err; | |
540 | } | |
541 | # endif | |
542 | s->version = SSL3_VERSION; | |
543 | s->method = SSLv3_client_method(); | |
544 | } else | |
cd332a07 | 545 | #endif |
40720ce3 MC |
546 | if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) { |
547 | s->version = TLS1_VERSION; | |
548 | s->method = TLSv1_client_method(); | |
549 | } else { | |
550 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); | |
551 | goto err; | |
552 | } | |
553 | ||
554 | /* ensure that TLS_MAX_VERSION is up-to-date */ | |
555 | OPENSSL_assert(s->version <= TLS_MAX_VERSION); | |
556 | ||
557 | if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) { | |
558 | /* fatal alert */ | |
559 | ||
560 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
561 | int j; | |
562 | ||
563 | if (s->info_callback != NULL) | |
564 | cb = s->info_callback; | |
565 | else if (s->ctx->info_callback != NULL) | |
566 | cb = s->ctx->info_callback; | |
567 | ||
568 | i = p[5]; | |
569 | if (cb != NULL) { | |
570 | j = (i << 8) | p[6]; | |
571 | cb(s, SSL_CB_READ_ALERT, j); | |
572 | } | |
573 | ||
574 | if (s->msg_callback) | |
575 | s->msg_callback(0, s->version, SSL3_RT_ALERT, p + 5, 2, s, | |
576 | s->msg_callback_arg); | |
577 | ||
578 | s->rwstate = SSL_NOTHING; | |
579 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_AD_REASON_OFFSET + p[6]); | |
580 | goto err; | |
581 | } | |
582 | ||
583 | if (!ssl_init_wbio_buffer(s, 1)) | |
584 | goto err; | |
585 | ||
586 | /* we are in this state */ | |
587 | s->state = SSL3_ST_CR_SRVR_HELLO_A; | |
588 | ||
589 | /* | |
590 | * put the 7 bytes we have read into the input buffer for SSLv3 | |
591 | */ | |
592 | s->rstate = SSL_ST_READ_HEADER; | |
593 | s->packet_length = n; | |
594 | if (s->s3->rbuf.buf == NULL) | |
595 | if (!ssl3_setup_buffers(s)) | |
596 | goto err; | |
597 | s->packet = &(s->s3->rbuf.buf[0]); | |
598 | memcpy(s->packet, buf, n); | |
599 | s->s3->rbuf.left = n; | |
600 | s->s3->rbuf.offset = 0; | |
601 | ||
602 | s->handshake_func = s->method->ssl_connect; | |
603 | } else { | |
604 | SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL); | |
605 | goto err; | |
606 | } | |
607 | s->init_num = 0; | |
608 | ||
609 | /* | |
610 | * Since, if we are sending a ssl23 client hello, we are not reusing a | |
611 | * session-id | |
612 | */ | |
613 | if (!ssl_get_new_session(s, 0)) | |
614 | goto err; | |
615 | ||
616 | return (SSL_connect(s)); | |
617 | err: | |
618 | return (-1); | |
619 | } |