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36d16f8e BL |
1 | /* ssl/d1_clnt.c */ |
2 | /* | |
3 | * DTLS implementation written by Nagendra Modadugu | |
4 | * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. | |
5 | */ | |
6 | /* ==================================================================== | |
52b8dad8 | 7 | * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved. |
36d16f8e BL |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * openssl-core@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
60 | * All rights reserved. | |
61 | * | |
62 | * This package is an SSL implementation written | |
63 | * by Eric Young (eay@cryptsoft.com). | |
64 | * The implementation was written so as to conform with Netscapes SSL. | |
65 | * | |
66 | * This library is free for commercial and non-commercial use as long as | |
67 | * the following conditions are aheared to. The following conditions | |
68 | * apply to all code found in this distribution, be it the RC4, RSA, | |
69 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
70 | * included with this distribution is covered by the same copyright terms | |
71 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
72 | * | |
73 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
74 | * the code are not to be removed. | |
75 | * If this package is used in a product, Eric Young should be given attribution | |
76 | * as the author of the parts of the library used. | |
77 | * This can be in the form of a textual message at program startup or | |
78 | * in documentation (online or textual) provided with the package. | |
79 | * | |
80 | * Redistribution and use in source and binary forms, with or without | |
81 | * modification, are permitted provided that the following conditions | |
82 | * are met: | |
83 | * 1. Redistributions of source code must retain the copyright | |
84 | * notice, this list of conditions and the following disclaimer. | |
85 | * 2. Redistributions in binary form must reproduce the above copyright | |
86 | * notice, this list of conditions and the following disclaimer in the | |
87 | * documentation and/or other materials provided with the distribution. | |
88 | * 3. All advertising materials mentioning features or use of this software | |
89 | * must display the following acknowledgement: | |
90 | * "This product includes cryptographic software written by | |
91 | * Eric Young (eay@cryptsoft.com)" | |
92 | * The word 'cryptographic' can be left out if the rouines from the library | |
93 | * being used are not cryptographic related :-). | |
94 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
95 | * the apps directory (application code) you must include an acknowledgement: | |
96 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
97 | * | |
98 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
99 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
100 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
101 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
102 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
103 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
104 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
105 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
106 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
107 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
108 | * SUCH DAMAGE. | |
109 | * | |
110 | * The licence and distribution terms for any publically available version or | |
111 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
112 | * copied and put under another distribution licence | |
113 | * [including the GNU Public Licence.] | |
114 | */ | |
115 | ||
116 | #include <stdio.h> | |
117 | #include "ssl_locl.h" | |
ef236ec3 DSH |
118 | #ifndef OPENSSL_NO_KRB5 |
119 | #include "kssl_lcl.h" | |
120 | #endif | |
36d16f8e BL |
121 | #include <openssl/buffer.h> |
122 | #include <openssl/rand.h> | |
123 | #include <openssl/objects.h> | |
124 | #include <openssl/evp.h> | |
125 | #include <openssl/md5.h> | |
1e26a8ba | 126 | #include <openssl/bn.h> |
3eeaab4b NL |
127 | #ifndef OPENSSL_NO_DH |
128 | #include <openssl/dh.h> | |
129 | #endif | |
36d16f8e | 130 | |
4ebb342f | 131 | static const SSL_METHOD *dtls1_get_client_method(int ver); |
36d16f8e BL |
132 | static int dtls1_get_hello_verify(SSL *s); |
133 | ||
4ebb342f | 134 | static const SSL_METHOD *dtls1_get_client_method(int ver) |
36d16f8e | 135 | { |
8711efb4 | 136 | if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER) |
36d16f8e BL |
137 | return(DTLSv1_client_method()); |
138 | else | |
139 | return(NULL); | |
140 | } | |
141 | ||
f3b656b2 DSH |
142 | IMPLEMENT_dtls1_meth_func(DTLSv1_client_method, |
143 | ssl_undefined_function, | |
144 | dtls1_connect, | |
145 | dtls1_get_client_method) | |
36d16f8e BL |
146 | |
147 | int dtls1_connect(SSL *s) | |
148 | { | |
149 | BUF_MEM *buf=NULL; | |
7e69565f | 150 | unsigned long Time=(unsigned long)time(NULL); |
36d16f8e BL |
151 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
152 | int ret= -1; | |
7e159e01 DSH |
153 | int new_state,state,skip=0; |
154 | #ifndef OPENSSL_NO_SCTP | |
155 | unsigned char sctpauthkey[64]; | |
156 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
157 | #endif | |
36d16f8e BL |
158 | |
159 | RAND_add(&Time,sizeof(Time),0); | |
160 | ERR_clear_error(); | |
161 | clear_sys_error(); | |
162 | ||
163 | if (s->info_callback != NULL) | |
164 | cb=s->info_callback; | |
165 | else if (s->ctx->info_callback != NULL) | |
166 | cb=s->ctx->info_callback; | |
167 | ||
168 | s->in_handshake++; | |
169 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
170 | ||
7e159e01 DSH |
171 | #ifndef OPENSSL_NO_SCTP |
172 | /* Notify SCTP BIO socket to enter handshake | |
173 | * mode and prevent stream identifier other | |
174 | * than 0. Will be ignored if no SCTP is used. | |
175 | */ | |
176 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL); | |
177 | #endif | |
178 | ||
4817504d DSH |
179 | #ifndef OPENSSL_NO_HEARTBEATS |
180 | /* If we're awaiting a HeartbeatResponse, pretend we | |
181 | * already got and don't await it anymore, because | |
182 | * Heartbeats don't make sense during handshakes anyway. | |
183 | */ | |
184 | if (s->tlsext_hb_pending) | |
185 | { | |
186 | dtls1_stop_timer(s); | |
187 | s->tlsext_hb_pending = 0; | |
188 | s->tlsext_hb_seq++; | |
189 | } | |
190 | #endif | |
191 | ||
36d16f8e BL |
192 | for (;;) |
193 | { | |
194 | state=s->state; | |
195 | ||
196 | switch(s->state) | |
197 | { | |
198 | case SSL_ST_RENEGOTIATE: | |
44959ee4 | 199 | s->renegotiate=1; |
36d16f8e BL |
200 | s->state=SSL_ST_CONNECT; |
201 | s->ctx->stats.sess_connect_renegotiate++; | |
202 | /* break */ | |
203 | case SSL_ST_BEFORE: | |
204 | case SSL_ST_CONNECT: | |
205 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
206 | case SSL_ST_OK|SSL_ST_CONNECT: | |
207 | ||
208 | s->server=0; | |
209 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
210 | ||
8711efb4 DSH |
211 | if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) && |
212 | (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00)) | |
36d16f8e | 213 | { |
beb056b3 | 214 | SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
215 | ret = -1; |
216 | goto end; | |
217 | } | |
218 | ||
219 | /* s->version=SSL3_VERSION; */ | |
220 | s->type=SSL_ST_CONNECT; | |
221 | ||
222 | if (s->init_buf == NULL) | |
223 | { | |
224 | if ((buf=BUF_MEM_new()) == NULL) | |
225 | { | |
226 | ret= -1; | |
227 | goto end; | |
228 | } | |
229 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
230 | { | |
231 | ret= -1; | |
232 | goto end; | |
233 | } | |
234 | s->init_buf=buf; | |
235 | buf=NULL; | |
236 | } | |
237 | ||
238 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
239 | ||
240 | /* setup buffing BIO */ | |
241 | if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } | |
242 | ||
243 | /* don't push the buffering BIO quite yet */ | |
244 | ||
36d16f8e BL |
245 | s->state=SSL3_ST_CW_CLNT_HELLO_A; |
246 | s->ctx->stats.sess_connect++; | |
247 | s->init_num=0; | |
e7adda52 AP |
248 | /* mark client_random uninitialized */ |
249 | memset(s->s3->client_random,0,sizeof(s->s3->client_random)); | |
0f65d5eb DSH |
250 | s->d1->send_cookie = 0; |
251 | s->hit = 0; | |
36d16f8e BL |
252 | break; |
253 | ||
7e159e01 DSH |
254 | #ifndef OPENSSL_NO_SCTP |
255 | case DTLS1_SCTP_ST_CR_READ_SOCK: | |
256 | ||
257 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) | |
258 | { | |
259 | s->s3->in_read_app_data=2; | |
260 | s->rwstate=SSL_READING; | |
261 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
262 | BIO_set_retry_read(SSL_get_rbio(s)); | |
263 | ret = -1; | |
264 | goto end; | |
265 | } | |
266 | ||
267 | s->state=s->s3->tmp.next_state; | |
268 | break; | |
269 | ||
270 | case DTLS1_SCTP_ST_CW_WRITE_SOCK: | |
271 | /* read app data until dry event */ | |
272 | ||
273 | ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s)); | |
274 | if (ret < 0) goto end; | |
275 | ||
276 | if (ret == 0) | |
277 | { | |
278 | s->s3->in_read_app_data=2; | |
279 | s->rwstate=SSL_READING; | |
280 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
281 | BIO_set_retry_read(SSL_get_rbio(s)); | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | s->state=s->d1->next_state; | |
287 | break; | |
288 | #endif | |
289 | ||
36d16f8e BL |
290 | case SSL3_ST_CW_CLNT_HELLO_A: |
291 | case SSL3_ST_CW_CLNT_HELLO_B: | |
292 | ||
293 | s->shutdown=0; | |
0d97d00b AP |
294 | |
295 | /* every DTLS ClientHello resets Finished MAC */ | |
296 | ssl3_init_finished_mac(s); | |
297 | ||
eb38b26d | 298 | dtls1_start_timer(s); |
173e72e6 | 299 | ret=ssl3_client_hello(s); |
36d16f8e BL |
300 | if (ret <= 0) goto end; |
301 | ||
302 | if ( s->d1->send_cookie) | |
303 | { | |
304 | s->state=SSL3_ST_CW_FLUSH; | |
305 | s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A; | |
306 | } | |
307 | else | |
308 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
309 | ||
310 | s->init_num=0; | |
311 | ||
7e159e01 DSH |
312 | #ifndef OPENSSL_NO_SCTP |
313 | /* Disable buffering for SCTP */ | |
314 | if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
315 | { | |
316 | #endif | |
317 | /* turn on buffering for the next lot of output */ | |
318 | if (s->bbio != s->wbio) | |
319 | s->wbio=BIO_push(s->bbio,s->wbio); | |
320 | #ifndef OPENSSL_NO_SCTP | |
321 | } | |
322 | #endif | |
36d16f8e BL |
323 | |
324 | break; | |
325 | ||
326 | case SSL3_ST_CR_SRVR_HELLO_A: | |
327 | case SSL3_ST_CR_SRVR_HELLO_B: | |
328 | ret=ssl3_get_server_hello(s); | |
329 | if (ret <= 0) goto end; | |
330 | else | |
331 | { | |
332 | if (s->hit) | |
7e159e01 DSH |
333 | { |
334 | #ifndef OPENSSL_NO_SCTP | |
335 | /* Add new shared key for SCTP-Auth, | |
336 | * will be ignored if no SCTP used. | |
337 | */ | |
338 | snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), | |
339 | DTLS1_SCTP_AUTH_LABEL); | |
340 | ||
341 | SSL_export_keying_material(s, sctpauthkey, | |
342 | sizeof(sctpauthkey), labelbuffer, | |
343 | sizeof(labelbuffer), NULL, 0, 0); | |
344 | ||
345 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
346 | sizeof(sctpauthkey), sctpauthkey); | |
347 | #endif | |
348 | ||
36d16f8e | 349 | s->state=SSL3_ST_CR_FINISHED_A; |
7e159e01 | 350 | } |
36d16f8e BL |
351 | else |
352 | s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A; | |
353 | } | |
354 | s->init_num=0; | |
355 | break; | |
356 | ||
357 | case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A: | |
358 | case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B: | |
359 | ||
360 | ret = dtls1_get_hello_verify(s); | |
361 | if ( ret <= 0) | |
362 | goto end; | |
eb38b26d | 363 | dtls1_stop_timer(s); |
36d16f8e BL |
364 | if ( s->d1->send_cookie) /* start again, with a cookie */ |
365 | s->state=SSL3_ST_CW_CLNT_HELLO_A; | |
366 | else | |
367 | s->state = SSL3_ST_CR_CERT_A; | |
368 | s->init_num = 0; | |
369 | break; | |
370 | ||
371 | case SSL3_ST_CR_CERT_A: | |
372 | case SSL3_ST_CR_CERT_B: | |
8025e251 DSH |
373 | #ifndef OPENSSL_NO_TLSEXT |
374 | ret=ssl3_check_finished(s); | |
375 | if (ret <= 0) goto end; | |
376 | if (ret == 2) | |
377 | { | |
378 | s->hit = 1; | |
379 | if (s->tlsext_ticket_expected) | |
380 | s->state=SSL3_ST_CR_SESSION_TICKET_A; | |
381 | else | |
382 | s->state=SSL3_ST_CR_FINISHED_A; | |
383 | s->init_num=0; | |
384 | break; | |
385 | } | |
386 | #endif | |
6cf41fec DSH |
387 | /* Check if it is anon DH or PSK */ |
388 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && | |
389 | !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
36d16f8e BL |
390 | { |
391 | ret=ssl3_get_server_certificate(s); | |
392 | if (ret <= 0) goto end; | |
8025e251 DSH |
393 | #ifndef OPENSSL_NO_TLSEXT |
394 | if (s->tlsext_status_expected) | |
395 | s->state=SSL3_ST_CR_CERT_STATUS_A; | |
396 | else | |
397 | s->state=SSL3_ST_CR_KEY_EXCH_A; | |
398 | } | |
399 | else | |
400 | { | |
401 | skip = 1; | |
402 | s->state=SSL3_ST_CR_KEY_EXCH_A; | |
403 | } | |
404 | #else | |
36d16f8e BL |
405 | } |
406 | else | |
407 | skip=1; | |
8025e251 | 408 | |
36d16f8e | 409 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
8025e251 | 410 | #endif |
36d16f8e BL |
411 | s->init_num=0; |
412 | break; | |
413 | ||
414 | case SSL3_ST_CR_KEY_EXCH_A: | |
415 | case SSL3_ST_CR_KEY_EXCH_B: | |
416 | ret=ssl3_get_key_exchange(s); | |
417 | if (ret <= 0) goto end; | |
418 | s->state=SSL3_ST_CR_CERT_REQ_A; | |
419 | s->init_num=0; | |
420 | ||
421 | /* at this point we check that we have the | |
422 | * required stuff from the server */ | |
423 | if (!ssl3_check_cert_and_algorithm(s)) | |
424 | { | |
425 | ret= -1; | |
426 | goto end; | |
427 | } | |
428 | break; | |
429 | ||
430 | case SSL3_ST_CR_CERT_REQ_A: | |
431 | case SSL3_ST_CR_CERT_REQ_B: | |
432 | ret=ssl3_get_certificate_request(s); | |
433 | if (ret <= 0) goto end; | |
434 | s->state=SSL3_ST_CR_SRVR_DONE_A; | |
435 | s->init_num=0; | |
436 | break; | |
437 | ||
438 | case SSL3_ST_CR_SRVR_DONE_A: | |
439 | case SSL3_ST_CR_SRVR_DONE_B: | |
440 | ret=ssl3_get_server_done(s); | |
441 | if (ret <= 0) goto end; | |
0fbf8b9c | 442 | dtls1_stop_timer(s); |
36d16f8e | 443 | if (s->s3->tmp.cert_req) |
7e159e01 | 444 | s->s3->tmp.next_state=SSL3_ST_CW_CERT_A; |
36d16f8e | 445 | else |
7e159e01 | 446 | s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A; |
36d16f8e BL |
447 | s->init_num=0; |
448 | ||
7e159e01 DSH |
449 | #ifndef OPENSSL_NO_SCTP |
450 | if (BIO_dgram_is_sctp(SSL_get_wbio(s)) && | |
451 | state == SSL_ST_RENEGOTIATE) | |
452 | s->state=DTLS1_SCTP_ST_CR_READ_SOCK; | |
453 | else | |
454 | #endif | |
455 | s->state=s->s3->tmp.next_state; | |
36d16f8e BL |
456 | break; |
457 | ||
458 | case SSL3_ST_CW_CERT_A: | |
459 | case SSL3_ST_CW_CERT_B: | |
460 | case SSL3_ST_CW_CERT_C: | |
461 | case SSL3_ST_CW_CERT_D: | |
eb38b26d | 462 | dtls1_start_timer(s); |
173e72e6 | 463 | ret=ssl3_send_client_certificate(s); |
36d16f8e BL |
464 | if (ret <= 0) goto end; |
465 | s->state=SSL3_ST_CW_KEY_EXCH_A; | |
466 | s->init_num=0; | |
467 | break; | |
468 | ||
469 | case SSL3_ST_CW_KEY_EXCH_A: | |
470 | case SSL3_ST_CW_KEY_EXCH_B: | |
eb38b26d | 471 | dtls1_start_timer(s); |
173e72e6 | 472 | ret=ssl3_send_client_key_exchange(s); |
36d16f8e | 473 | if (ret <= 0) goto end; |
7e159e01 DSH |
474 | |
475 | #ifndef OPENSSL_NO_SCTP | |
476 | /* Add new shared key for SCTP-Auth, | |
477 | * will be ignored if no SCTP used. | |
478 | */ | |
479 | snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), | |
480 | DTLS1_SCTP_AUTH_LABEL); | |
481 | ||
482 | SSL_export_keying_material(s, sctpauthkey, | |
483 | sizeof(sctpauthkey), labelbuffer, | |
484 | sizeof(labelbuffer), NULL, 0, 0); | |
485 | ||
486 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
487 | sizeof(sctpauthkey), sctpauthkey); | |
488 | #endif | |
489 | ||
36d16f8e BL |
490 | /* EAY EAY EAY need to check for DH fix cert |
491 | * sent back */ | |
492 | /* For TLS, cert_req is set to 2, so a cert chain | |
493 | * of nothing is sent, but no verify packet is sent */ | |
494 | if (s->s3->tmp.cert_req == 1) | |
495 | { | |
496 | s->state=SSL3_ST_CW_CERT_VRFY_A; | |
497 | } | |
498 | else | |
499 | { | |
7e159e01 DSH |
500 | #ifndef OPENSSL_NO_SCTP |
501 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
502 | { | |
503 | s->d1->next_state=SSL3_ST_CW_CHANGE_A; | |
504 | s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; | |
505 | } | |
506 | else | |
507 | #endif | |
508 | s->state=SSL3_ST_CW_CHANGE_A; | |
36d16f8e BL |
509 | s->s3->change_cipher_spec=0; |
510 | } | |
511 | ||
512 | s->init_num=0; | |
513 | break; | |
514 | ||
515 | case SSL3_ST_CW_CERT_VRFY_A: | |
516 | case SSL3_ST_CW_CERT_VRFY_B: | |
eb38b26d | 517 | dtls1_start_timer(s); |
173e72e6 | 518 | ret=ssl3_send_client_verify(s); |
36d16f8e | 519 | if (ret <= 0) goto end; |
7e159e01 DSH |
520 | #ifndef OPENSSL_NO_SCTP |
521 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
522 | { | |
523 | s->d1->next_state=SSL3_ST_CW_CHANGE_A; | |
524 | s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; | |
525 | } | |
526 | else | |
527 | #endif | |
528 | s->state=SSL3_ST_CW_CHANGE_A; | |
36d16f8e BL |
529 | s->init_num=0; |
530 | s->s3->change_cipher_spec=0; | |
531 | break; | |
532 | ||
533 | case SSL3_ST_CW_CHANGE_A: | |
534 | case SSL3_ST_CW_CHANGE_B: | |
ee4b5ceb DSH |
535 | if (!s->hit) |
536 | dtls1_start_timer(s); | |
36d16f8e BL |
537 | ret=dtls1_send_change_cipher_spec(s, |
538 | SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); | |
539 | if (ret <= 0) goto end; | |
7e159e01 DSH |
540 | |
541 | #ifndef OPENSSL_NO_SCTP | |
542 | /* Change to new shared key of SCTP-Auth, | |
543 | * will be ignored if no SCTP used. | |
544 | */ | |
545 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); | |
546 | #endif | |
547 | ||
36d16f8e BL |
548 | s->state=SSL3_ST_CW_FINISHED_A; |
549 | s->init_num=0; | |
550 | ||
551 | s->session->cipher=s->s3->tmp.new_cipher; | |
09b6c2ef DSH |
552 | #ifdef OPENSSL_NO_COMP |
553 | s->session->compress_meth=0; | |
554 | #else | |
36d16f8e BL |
555 | if (s->s3->tmp.new_compression == NULL) |
556 | s->session->compress_meth=0; | |
557 | else | |
558 | s->session->compress_meth= | |
559 | s->s3->tmp.new_compression->id; | |
09b6c2ef | 560 | #endif |
36d16f8e BL |
561 | if (!s->method->ssl3_enc->setup_key_block(s)) |
562 | { | |
563 | ret= -1; | |
564 | goto end; | |
565 | } | |
566 | ||
567 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
568 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
569 | { | |
570 | ret= -1; | |
571 | goto end; | |
572 | } | |
573 | ||
574 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
575 | break; | |
576 | ||
577 | case SSL3_ST_CW_FINISHED_A: | |
578 | case SSL3_ST_CW_FINISHED_B: | |
ee4b5ceb DSH |
579 | if (!s->hit) |
580 | dtls1_start_timer(s); | |
173e72e6 | 581 | ret=ssl3_send_finished(s, |
36d16f8e BL |
582 | SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, |
583 | s->method->ssl3_enc->client_finished_label, | |
584 | s->method->ssl3_enc->client_finished_label_len); | |
585 | if (ret <= 0) goto end; | |
586 | s->state=SSL3_ST_CW_FLUSH; | |
587 | ||
588 | /* clear flags */ | |
589 | s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; | |
590 | if (s->hit) | |
591 | { | |
592 | s->s3->tmp.next_state=SSL_ST_OK; | |
7e159e01 DSH |
593 | #ifndef OPENSSL_NO_SCTP |
594 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
595 | { | |
596 | s->d1->next_state = s->s3->tmp.next_state; | |
597 | s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK; | |
598 | } | |
599 | #endif | |
36d16f8e BL |
600 | if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) |
601 | { | |
602 | s->state=SSL_ST_OK; | |
7e159e01 DSH |
603 | #ifndef OPENSSL_NO_SCTP |
604 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
605 | { | |
606 | s->d1->next_state = SSL_ST_OK; | |
607 | s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; | |
608 | } | |
609 | #endif | |
36d16f8e BL |
610 | s->s3->flags|=SSL3_FLAGS_POP_BUFFER; |
611 | s->s3->delay_buf_pop_ret=0; | |
612 | } | |
613 | } | |
614 | else | |
615 | { | |
8025e251 DSH |
616 | #ifndef OPENSSL_NO_TLSEXT |
617 | /* Allow NewSessionTicket if ticket expected */ | |
618 | if (s->tlsext_ticket_expected) | |
619 | s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; | |
620 | else | |
621 | #endif | |
622 | ||
36d16f8e BL |
623 | s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; |
624 | } | |
625 | s->init_num=0; | |
626 | break; | |
627 | ||
8025e251 DSH |
628 | #ifndef OPENSSL_NO_TLSEXT |
629 | case SSL3_ST_CR_SESSION_TICKET_A: | |
630 | case SSL3_ST_CR_SESSION_TICKET_B: | |
631 | ret=ssl3_get_new_session_ticket(s); | |
632 | if (ret <= 0) goto end; | |
633 | s->state=SSL3_ST_CR_FINISHED_A; | |
634 | s->init_num=0; | |
635 | break; | |
636 | ||
637 | case SSL3_ST_CR_CERT_STATUS_A: | |
638 | case SSL3_ST_CR_CERT_STATUS_B: | |
639 | ret=ssl3_get_cert_status(s); | |
640 | if (ret <= 0) goto end; | |
641 | s->state=SSL3_ST_CR_KEY_EXCH_A; | |
642 | s->init_num=0; | |
643 | break; | |
644 | #endif | |
645 | ||
36d16f8e BL |
646 | case SSL3_ST_CR_FINISHED_A: |
647 | case SSL3_ST_CR_FINISHED_B: | |
58f41a92 | 648 | s->d1->change_cipher_spec_ok = 1; |
36d16f8e BL |
649 | ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, |
650 | SSL3_ST_CR_FINISHED_B); | |
651 | if (ret <= 0) goto end; | |
eb38b26d | 652 | dtls1_stop_timer(s); |
36d16f8e BL |
653 | |
654 | if (s->hit) | |
655 | s->state=SSL3_ST_CW_CHANGE_A; | |
656 | else | |
657 | s->state=SSL_ST_OK; | |
7e159e01 DSH |
658 | |
659 | #ifndef OPENSSL_NO_SCTP | |
660 | if (BIO_dgram_is_sctp(SSL_get_wbio(s)) && | |
661 | state == SSL_ST_RENEGOTIATE) | |
662 | { | |
663 | s->d1->next_state=s->state; | |
664 | s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; | |
665 | } | |
666 | #endif | |
667 | ||
36d16f8e BL |
668 | s->init_num=0; |
669 | break; | |
670 | ||
671 | case SSL3_ST_CW_FLUSH: | |
d5e7f2f2 DSH |
672 | s->rwstate=SSL_WRITING; |
673 | if (BIO_flush(s->wbio) <= 0) | |
36d16f8e | 674 | { |
7e159e01 DSH |
675 | /* If the write error was fatal, stop trying */ |
676 | if (!BIO_should_retry(s->wbio)) | |
677 | { | |
678 | s->rwstate=SSL_NOTHING; | |
679 | s->state=s->s3->tmp.next_state; | |
680 | } | |
681 | ||
d5e7f2f2 DSH |
682 | ret= -1; |
683 | goto end; | |
36d16f8e | 684 | } |
d5e7f2f2 | 685 | s->rwstate=SSL_NOTHING; |
36d16f8e BL |
686 | s->state=s->s3->tmp.next_state; |
687 | break; | |
688 | ||
689 | case SSL_ST_OK: | |
690 | /* clean a few things up */ | |
691 | ssl3_cleanup_key_block(s); | |
692 | ||
693 | #if 0 | |
694 | if (s->init_buf != NULL) | |
695 | { | |
696 | BUF_MEM_free(s->init_buf); | |
697 | s->init_buf=NULL; | |
698 | } | |
699 | #endif | |
700 | ||
701 | /* If we are not 'joining' the last two packets, | |
702 | * remove the buffering now */ | |
703 | if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) | |
704 | ssl_free_wbio_buffer(s); | |
705 | /* else do it later in ssl3_write */ | |
706 | ||
707 | s->init_num=0; | |
44959ee4 | 708 | s->renegotiate=0; |
36d16f8e BL |
709 | s->new_session=0; |
710 | ||
711 | ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); | |
712 | if (s->hit) s->ctx->stats.sess_hit++; | |
713 | ||
714 | ret=1; | |
715 | /* s->server=0; */ | |
716 | s->handshake_func=dtls1_connect; | |
717 | s->ctx->stats.sess_connect_good++; | |
718 | ||
719 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
720 | ||
721 | /* done with handshaking */ | |
722 | s->d1->handshake_read_seq = 0; | |
e5fa864f | 723 | s->d1->next_handshake_write_seq = 0; |
36d16f8e BL |
724 | goto end; |
725 | /* break; */ | |
726 | ||
727 | default: | |
beb056b3 | 728 | SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE); |
36d16f8e BL |
729 | ret= -1; |
730 | goto end; | |
731 | /* break; */ | |
732 | } | |
733 | ||
734 | /* did we do anything */ | |
735 | if (!s->s3->tmp.reuse_message && !skip) | |
736 | { | |
737 | if (s->debug) | |
738 | { | |
739 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
740 | goto end; | |
741 | } | |
742 | ||
743 | if ((cb != NULL) && (s->state != state)) | |
744 | { | |
745 | new_state=s->state; | |
746 | s->state=state; | |
747 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
748 | s->state=new_state; | |
749 | } | |
750 | } | |
751 | skip=0; | |
752 | } | |
753 | end: | |
754 | s->in_handshake--; | |
7e159e01 DSH |
755 | |
756 | #ifndef OPENSSL_NO_SCTP | |
757 | /* Notify SCTP BIO socket to leave handshake | |
758 | * mode and allow stream identifier other | |
759 | * than 0. Will be ignored if no SCTP is used. | |
760 | */ | |
761 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL); | |
762 | #endif | |
763 | ||
36d16f8e BL |
764 | if (buf != NULL) |
765 | BUF_MEM_free(buf); | |
766 | if (cb != NULL) | |
767 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
768 | return(ret); | |
769 | } | |
770 | ||
36d16f8e BL |
771 | static int dtls1_get_hello_verify(SSL *s) |
772 | { | |
773 | int n, al, ok = 0; | |
774 | unsigned char *data; | |
775 | unsigned int cookie_len; | |
776 | ||
777 | n=s->method->ssl_get_message(s, | |
778 | DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, | |
779 | DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, | |
780 | -1, | |
781 | s->max_cert_list, | |
782 | &ok); | |
783 | ||
784 | if (!ok) return((int)n); | |
785 | ||
786 | if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) | |
787 | { | |
788 | s->d1->send_cookie = 0; | |
789 | s->s3->tmp.reuse_message=1; | |
790 | return(1); | |
791 | } | |
792 | ||
793 | data = (unsigned char *)s->init_msg; | |
794 | ||
795 | if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff))) | |
796 | { | |
beb056b3 | 797 | SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION); |
36d16f8e BL |
798 | s->version=(s->version&0xff00)|data[1]; |
799 | al = SSL_AD_PROTOCOL_VERSION; | |
800 | goto f_err; | |
801 | } | |
802 | data+=2; | |
803 | ||
804 | cookie_len = *(data++); | |
805 | if ( cookie_len > sizeof(s->d1->cookie)) | |
806 | { | |
807 | al=SSL_AD_ILLEGAL_PARAMETER; | |
808 | goto f_err; | |
809 | } | |
810 | ||
811 | memcpy(s->d1->cookie, data, cookie_len); | |
812 | s->d1->cookie_len = cookie_len; | |
813 | ||
814 | s->d1->send_cookie = 1; | |
815 | return 1; | |
816 | ||
817 | f_err: | |
818 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
819 | return -1; | |
820 | } | |
821 |