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36d16f8e BL |
1 | /* ssl/d1_srvr.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" | |
118 | #include <openssl/buffer.h> | |
119 | #include <openssl/rand.h> | |
120 | #include <openssl/objects.h> | |
121 | #include <openssl/evp.h> | |
122 | #include <openssl/x509.h> | |
123 | #include <openssl/md5.h> | |
1e26a8ba | 124 | #include <openssl/bn.h> |
3eeaab4b NL |
125 | #ifndef OPENSSL_NO_DH |
126 | #include <openssl/dh.h> | |
127 | #endif | |
36d16f8e | 128 | |
4ebb342f | 129 | static const SSL_METHOD *dtls1_get_server_method(int ver); |
36d16f8e BL |
130 | static int dtls1_send_hello_verify_request(SSL *s); |
131 | ||
4ebb342f | 132 | static const SSL_METHOD *dtls1_get_server_method(int ver) |
36d16f8e BL |
133 | { |
134 | if (ver == DTLS1_VERSION) | |
135 | return(DTLSv1_server_method()); | |
c3b344e3 DSH |
136 | else if (ver == DTLS1_2_VERSION) |
137 | return(DTLSv1_2_server_method()); | |
36d16f8e BL |
138 | else |
139 | return(NULL); | |
140 | } | |
141 | ||
cfd298b7 DSH |
142 | IMPLEMENT_dtls1_meth_func(DTLS1_VERSION, |
143 | DTLSv1_server_method, | |
f3b656b2 DSH |
144 | dtls1_accept, |
145 | ssl_undefined_function, | |
cfd298b7 DSH |
146 | dtls1_get_server_method, |
147 | DTLSv1_enc_data) | |
36d16f8e | 148 | |
c3b344e3 DSH |
149 | IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION, |
150 | DTLSv1_2_server_method, | |
151 | dtls1_accept, | |
152 | ssl_undefined_function, | |
153 | dtls1_get_server_method, | |
154 | DTLSv1_2_enc_data) | |
155 | ||
c6913eeb DSH |
156 | IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION, |
157 | DTLS_server_method, | |
158 | dtls1_accept, | |
159 | ssl_undefined_function, | |
160 | dtls1_get_server_method, | |
161 | DTLSv1_2_enc_data) | |
162 | ||
36d16f8e BL |
163 | int dtls1_accept(SSL *s) |
164 | { | |
165 | BUF_MEM *buf; | |
7e69565f | 166 | unsigned long Time=(unsigned long)time(NULL); |
36d16f8e | 167 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
52b8dad8 | 168 | unsigned long alg_k; |
36d16f8e BL |
169 | int ret= -1; |
170 | int new_state,state,skip=0; | |
006b54a8 | 171 | int listen; |
7e159e01 DSH |
172 | #ifndef OPENSSL_NO_SCTP |
173 | unsigned char sctpauthkey[64]; | |
174 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
175 | #endif | |
36d16f8e BL |
176 | |
177 | RAND_add(&Time,sizeof(Time),0); | |
178 | ERR_clear_error(); | |
179 | clear_sys_error(); | |
180 | ||
181 | if (s->info_callback != NULL) | |
182 | cb=s->info_callback; | |
183 | else if (s->ctx->info_callback != NULL) | |
184 | cb=s->ctx->info_callback; | |
006b54a8 DSH |
185 | |
186 | listen = s->d1->listen; | |
36d16f8e BL |
187 | |
188 | /* init things to blank */ | |
189 | s->in_handshake++; | |
190 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
191 | ||
0445ab3a | 192 | s->d1->listen = listen; |
7e159e01 DSH |
193 | #ifndef OPENSSL_NO_SCTP |
194 | /* Notify SCTP BIO socket to enter handshake | |
195 | * mode and prevent stream identifier other | |
196 | * than 0. Will be ignored if no SCTP is used. | |
197 | */ | |
198 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL); | |
199 | #endif | |
0445ab3a | 200 | |
36d16f8e BL |
201 | if (s->cert == NULL) |
202 | { | |
beb056b3 | 203 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
36d16f8e BL |
204 | return(-1); |
205 | } | |
206 | ||
4817504d DSH |
207 | #ifndef OPENSSL_NO_HEARTBEATS |
208 | /* If we're awaiting a HeartbeatResponse, pretend we | |
209 | * already got and don't await it anymore, because | |
210 | * Heartbeats don't make sense during handshakes anyway. | |
211 | */ | |
212 | if (s->tlsext_hb_pending) | |
213 | { | |
214 | dtls1_stop_timer(s); | |
215 | s->tlsext_hb_pending = 0; | |
216 | s->tlsext_hb_seq++; | |
217 | } | |
218 | #endif | |
219 | ||
36d16f8e BL |
220 | for (;;) |
221 | { | |
222 | state=s->state; | |
223 | ||
224 | switch (s->state) | |
225 | { | |
226 | case SSL_ST_RENEGOTIATE: | |
44959ee4 | 227 | s->renegotiate=1; |
36d16f8e BL |
228 | /* s->state=SSL_ST_ACCEPT; */ |
229 | ||
230 | case SSL_ST_BEFORE: | |
231 | case SSL_ST_ACCEPT: | |
232 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
233 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
234 | ||
235 | s->server=1; | |
236 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
237 | ||
238 | if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) | |
239 | { | |
beb056b3 | 240 | SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
241 | return -1; |
242 | } | |
243 | s->type=SSL_ST_ACCEPT; | |
244 | ||
245 | if (s->init_buf == NULL) | |
246 | { | |
247 | if ((buf=BUF_MEM_new()) == NULL) | |
248 | { | |
249 | ret= -1; | |
250 | goto end; | |
251 | } | |
252 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
253 | { | |
254 | ret= -1; | |
255 | goto end; | |
256 | } | |
257 | s->init_buf=buf; | |
258 | } | |
259 | ||
260 | if (!ssl3_setup_buffers(s)) | |
261 | { | |
262 | ret= -1; | |
263 | goto end; | |
264 | } | |
265 | ||
266 | s->init_num=0; | |
e94a6c0e EK |
267 | s->d1->change_cipher_spec_ok = 0; |
268 | /* Should have been reset by ssl3_get_finished, too. */ | |
269 | s->s3->change_cipher_spec = 0; | |
36d16f8e BL |
270 | |
271 | if (s->state != SSL_ST_RENEGOTIATE) | |
272 | { | |
273 | /* Ok, we now need to push on a buffering BIO so that | |
274 | * the output is sent in a way that TCP likes :-) | |
7e159e01 | 275 | * ...but not with SCTP :-) |
36d16f8e | 276 | */ |
7e159e01 DSH |
277 | #ifndef OPENSSL_NO_SCTP |
278 | if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
279 | #endif | |
280 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
36d16f8e BL |
281 | |
282 | ssl3_init_finished_mac(s); | |
283 | s->state=SSL3_ST_SR_CLNT_HELLO_A; | |
284 | s->ctx->stats.sess_accept++; | |
285 | } | |
286 | else | |
287 | { | |
288 | /* s->state == SSL_ST_RENEGOTIATE, | |
289 | * we will just send a HelloRequest */ | |
290 | s->ctx->stats.sess_accept_renegotiate++; | |
291 | s->state=SSL3_ST_SW_HELLO_REQ_A; | |
292 | } | |
293 | ||
36d16f8e BL |
294 | break; |
295 | ||
296 | case SSL3_ST_SW_HELLO_REQ_A: | |
297 | case SSL3_ST_SW_HELLO_REQ_B: | |
298 | ||
299 | s->shutdown=0; | |
b62f4daa | 300 | dtls1_clear_record_buffer(s); |
eb38b26d | 301 | dtls1_start_timer(s); |
173e72e6 | 302 | ret=ssl3_send_hello_request(s); |
36d16f8e | 303 | if (ret <= 0) goto end; |
b62f4daa | 304 | s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; |
36d16f8e BL |
305 | s->state=SSL3_ST_SW_FLUSH; |
306 | s->init_num=0; | |
307 | ||
308 | ssl3_init_finished_mac(s); | |
309 | break; | |
310 | ||
311 | case SSL3_ST_SW_HELLO_REQ_C: | |
312 | s->state=SSL_ST_OK; | |
313 | break; | |
314 | ||
315 | case SSL3_ST_SR_CLNT_HELLO_A: | |
316 | case SSL3_ST_SR_CLNT_HELLO_B: | |
317 | case SSL3_ST_SR_CLNT_HELLO_C: | |
318 | ||
319 | s->shutdown=0; | |
320 | ret=ssl3_get_client_hello(s); | |
321 | if (ret <= 0) goto end; | |
eb38b26d | 322 | dtls1_stop_timer(s); |
36d16f8e | 323 | |
07a9d1a2 | 324 | if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) |
36d16f8e BL |
325 | s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; |
326 | else | |
327 | s->state = SSL3_ST_SW_SRVR_HELLO_A; | |
328 | ||
329 | s->init_num=0; | |
1fc3ac80 | 330 | |
0445ab3a DSH |
331 | /* Reflect ClientHello sequence to remain stateless while listening */ |
332 | if (listen) | |
333 | { | |
334 | memcpy(s->s3->write_sequence, s->s3->read_sequence, sizeof(s->s3->write_sequence)); | |
335 | } | |
336 | ||
1fc3ac80 | 337 | /* If we're just listening, stop here */ |
006b54a8 | 338 | if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A) |
1fc3ac80 DSH |
339 | { |
340 | ret = 2; | |
341 | s->d1->listen = 0; | |
f74a0c0c DSH |
342 | /* Set expected sequence numbers |
343 | * to continue the handshake. | |
344 | */ | |
345 | s->d1->handshake_read_seq = 2; | |
346 | s->d1->handshake_write_seq = 1; | |
347 | s->d1->next_handshake_write_seq = 1; | |
1fc3ac80 DSH |
348 | goto end; |
349 | } | |
350 | ||
36d16f8e BL |
351 | break; |
352 | ||
353 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A: | |
354 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B: | |
355 | ||
356 | ret = dtls1_send_hello_verify_request(s); | |
357 | if ( ret <= 0) goto end; | |
36d16f8e BL |
358 | s->state=SSL3_ST_SW_FLUSH; |
359 | s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; | |
0d97d00b AP |
360 | |
361 | /* HelloVerifyRequest resets Finished MAC */ | |
8711efb4 DSH |
362 | if (s->version != DTLS1_BAD_VER) |
363 | ssl3_init_finished_mac(s); | |
36d16f8e BL |
364 | break; |
365 | ||
7e159e01 DSH |
366 | #ifndef OPENSSL_NO_SCTP |
367 | case DTLS1_SCTP_ST_SR_READ_SOCK: | |
368 | ||
369 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) | |
370 | { | |
371 | s->s3->in_read_app_data=2; | |
372 | s->rwstate=SSL_READING; | |
373 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
374 | BIO_set_retry_read(SSL_get_rbio(s)); | |
375 | ret = -1; | |
376 | goto end; | |
377 | } | |
378 | ||
379 | s->state=SSL3_ST_SR_FINISHED_A; | |
380 | break; | |
381 | ||
382 | case DTLS1_SCTP_ST_SW_WRITE_SOCK: | |
383 | ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s)); | |
384 | if (ret < 0) goto end; | |
385 | ||
386 | if (ret == 0) | |
387 | { | |
388 | if (s->d1->next_state != SSL_ST_OK) | |
389 | { | |
390 | s->s3->in_read_app_data=2; | |
391 | s->rwstate=SSL_READING; | |
392 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
393 | BIO_set_retry_read(SSL_get_rbio(s)); | |
394 | ret = -1; | |
395 | goto end; | |
396 | } | |
397 | } | |
398 | ||
399 | s->state=s->d1->next_state; | |
400 | break; | |
401 | #endif | |
402 | ||
36d16f8e BL |
403 | case SSL3_ST_SW_SRVR_HELLO_A: |
404 | case SSL3_ST_SW_SRVR_HELLO_B: | |
44959ee4 | 405 | s->renegotiate = 2; |
eb38b26d | 406 | dtls1_start_timer(s); |
173e72e6 | 407 | ret=ssl3_send_server_hello(s); |
36d16f8e BL |
408 | if (ret <= 0) goto end; |
409 | ||
410 | if (s->hit) | |
8025e251 | 411 | { |
7e159e01 DSH |
412 | #ifndef OPENSSL_NO_SCTP |
413 | /* Add new shared key for SCTP-Auth, | |
414 | * will be ignored if no SCTP used. | |
415 | */ | |
416 | snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), | |
417 | DTLS1_SCTP_AUTH_LABEL); | |
418 | ||
419 | SSL_export_keying_material(s, sctpauthkey, | |
420 | sizeof(sctpauthkey), labelbuffer, | |
421 | sizeof(labelbuffer), NULL, 0, 0); | |
422 | ||
423 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
424 | sizeof(sctpauthkey), sctpauthkey); | |
425 | #endif | |
426 | #ifndef OPENSSL_NO_TLSEXT | |
8025e251 DSH |
427 | if (s->tlsext_ticket_expected) |
428 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
429 | else | |
430 | s->state=SSL3_ST_SW_CHANGE_A; | |
8025e251 | 431 | #else |
7e159e01 | 432 | s->state=SSL3_ST_SW_CHANGE_A; |
8025e251 | 433 | #endif |
7e159e01 | 434 | } |
36d16f8e BL |
435 | else |
436 | s->state=SSL3_ST_SW_CERT_A; | |
437 | s->init_num=0; | |
438 | break; | |
439 | ||
440 | case SSL3_ST_SW_CERT_A: | |
441 | case SSL3_ST_SW_CERT_B: | |
6cf41fec DSH |
442 | /* Check if it is anon DH or normal PSK */ |
443 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) | |
444 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
36d16f8e | 445 | { |
eb38b26d | 446 | dtls1_start_timer(s); |
173e72e6 | 447 | ret=ssl3_send_server_certificate(s); |
36d16f8e | 448 | if (ret <= 0) goto end; |
8025e251 DSH |
449 | #ifndef OPENSSL_NO_TLSEXT |
450 | if (s->tlsext_status_expected) | |
451 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
452 | else | |
453 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
454 | } | |
455 | else | |
456 | { | |
457 | skip = 1; | |
458 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
459 | } | |
460 | #else | |
36d16f8e BL |
461 | } |
462 | else | |
463 | skip=1; | |
8025e251 | 464 | |
36d16f8e | 465 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
8025e251 | 466 | #endif |
36d16f8e BL |
467 | s->init_num=0; |
468 | break; | |
469 | ||
470 | case SSL3_ST_SW_KEY_EXCH_A: | |
471 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 472 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
36d16f8e BL |
473 | |
474 | /* clear this, it may get reset by | |
475 | * send_server_key_exchange */ | |
476 | if ((s->options & SSL_OP_EPHEMERAL_RSA) | |
477 | #ifndef OPENSSL_NO_KRB5 | |
52b8dad8 | 478 | && !(alg_k & SSL_kKRB5) |
36d16f8e BL |
479 | #endif /* OPENSSL_NO_KRB5 */ |
480 | ) | |
481 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key | |
482 | * even when forbidden by protocol specs | |
483 | * (handshake may fail as clients are not required to | |
484 | * be able to handle this) */ | |
485 | s->s3->tmp.use_rsa_tmp=1; | |
486 | else | |
487 | s->s3->tmp.use_rsa_tmp=0; | |
488 | ||
89bbe14c | 489 | /* only send if a DH key exchange or |
36d16f8e BL |
490 | * RSA but we have a sign only certificate */ |
491 | if (s->s3->tmp.use_rsa_tmp | |
6cf41fec DSH |
492 | /* PSK: send ServerKeyExchange if PSK identity |
493 | * hint if provided */ | |
494 | #ifndef OPENSSL_NO_PSK | |
495 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) | |
496 | #endif | |
5a21cadb | 497 | || (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd)) |
4082fea8 | 498 | || (alg_k & SSL_kECDHE) |
52b8dad8 | 499 | || ((alg_k & SSL_kRSA) |
36d16f8e BL |
500 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
501 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) | |
502 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
503 | ) | |
504 | ) | |
505 | ) | |
506 | ) | |
507 | { | |
eb38b26d | 508 | dtls1_start_timer(s); |
173e72e6 | 509 | ret=ssl3_send_server_key_exchange(s); |
36d16f8e BL |
510 | if (ret <= 0) goto end; |
511 | } | |
512 | else | |
513 | skip=1; | |
514 | ||
515 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
516 | s->init_num=0; | |
517 | break; | |
518 | ||
519 | case SSL3_ST_SW_CERT_REQ_A: | |
520 | case SSL3_ST_SW_CERT_REQ_B: | |
521 | if (/* don't request cert unless asked for it: */ | |
522 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
523 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
524 | * don't request cert during re-negotiation: */ | |
525 | ((s->session->peer != NULL) && | |
526 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || | |
527 | /* never request cert in anonymous ciphersuites | |
528 | * (see section "Certificate request" in SSL 3 drafts | |
529 | * and in RFC 2246): */ | |
52b8dad8 | 530 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
36d16f8e BL |
531 | /* ... except when the application insists on verification |
532 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
533 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || | |
52b8dad8 | 534 | /* never request cert in Kerberos ciphersuites */ |
6cf41fec DSH |
535 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) |
536 | /* With normal PSK Certificates and | |
537 | * Certificate Requests are omitted */ | |
538 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
36d16f8e BL |
539 | { |
540 | /* no cert request */ | |
541 | skip=1; | |
542 | s->s3->tmp.cert_request=0; | |
543 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
7e159e01 DSH |
544 | #ifndef OPENSSL_NO_SCTP |
545 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
546 | { | |
547 | s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A; | |
548 | s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK; | |
549 | } | |
550 | #endif | |
36d16f8e BL |
551 | } |
552 | else | |
553 | { | |
554 | s->s3->tmp.cert_request=1; | |
eb38b26d | 555 | dtls1_start_timer(s); |
173e72e6 | 556 | ret=ssl3_send_certificate_request(s); |
36d16f8e BL |
557 | if (ret <= 0) goto end; |
558 | #ifndef NETSCAPE_HANG_BUG | |
559 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
7e159e01 DSH |
560 | #ifndef OPENSSL_NO_SCTP |
561 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
562 | { | |
563 | s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A; | |
564 | s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK; | |
565 | } | |
566 | #endif | |
36d16f8e BL |
567 | #else |
568 | s->state=SSL3_ST_SW_FLUSH; | |
569 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
7e159e01 DSH |
570 | #ifndef OPENSSL_NO_SCTP |
571 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
572 | { | |
573 | s->d1->next_state = s->s3->tmp.next_state; | |
574 | s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK; | |
575 | } | |
576 | #endif | |
36d16f8e BL |
577 | #endif |
578 | s->init_num=0; | |
579 | } | |
580 | break; | |
581 | ||
582 | case SSL3_ST_SW_SRVR_DONE_A: | |
583 | case SSL3_ST_SW_SRVR_DONE_B: | |
eb38b26d | 584 | dtls1_start_timer(s); |
173e72e6 | 585 | ret=ssl3_send_server_done(s); |
36d16f8e BL |
586 | if (ret <= 0) goto end; |
587 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
588 | s->state=SSL3_ST_SW_FLUSH; | |
589 | s->init_num=0; | |
590 | break; | |
591 | ||
b380f9b8 | 592 | case SSL3_ST_SW_FLUSH: |
d5e7f2f2 DSH |
593 | s->rwstate=SSL_WRITING; |
594 | if (BIO_flush(s->wbio) <= 0) | |
36d16f8e | 595 | { |
7e159e01 DSH |
596 | /* If the write error was fatal, stop trying */ |
597 | if (!BIO_should_retry(s->wbio)) | |
598 | { | |
599 | s->rwstate=SSL_NOTHING; | |
600 | s->state=s->s3->tmp.next_state; | |
601 | } | |
602 | ||
d5e7f2f2 DSH |
603 | ret= -1; |
604 | goto end; | |
36d16f8e | 605 | } |
d5e7f2f2 | 606 | s->rwstate=SSL_NOTHING; |
36d16f8e BL |
607 | s->state=s->s3->tmp.next_state; |
608 | break; | |
609 | ||
610 | case SSL3_ST_SR_CERT_A: | |
611 | case SSL3_ST_SR_CERT_B: | |
612 | /* Check for second client hello (MS SGC) */ | |
613 | ret = ssl3_check_client_hello(s); | |
614 | if (ret <= 0) | |
615 | goto end; | |
616 | if (ret == 2) | |
0fbf8b9c DSH |
617 | { |
618 | dtls1_stop_timer(s); | |
36d16f8e | 619 | s->state = SSL3_ST_SR_CLNT_HELLO_C; |
0fbf8b9c | 620 | } |
36d16f8e | 621 | else { |
c8d710dc DSH |
622 | if (s->s3->tmp.cert_request) |
623 | { | |
624 | ret=ssl3_get_client_certificate(s); | |
625 | if (ret <= 0) goto end; | |
626 | } | |
36d16f8e BL |
627 | s->init_num=0; |
628 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
629 | } | |
630 | break; | |
631 | ||
632 | case SSL3_ST_SR_KEY_EXCH_A: | |
633 | case SSL3_ST_SR_KEY_EXCH_B: | |
634 | ret=ssl3_get_client_key_exchange(s); | |
635 | if (ret <= 0) goto end; | |
7e159e01 DSH |
636 | #ifndef OPENSSL_NO_SCTP |
637 | /* Add new shared key for SCTP-Auth, | |
638 | * will be ignored if no SCTP used. | |
639 | */ | |
640 | snprintf((char *) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), | |
641 | DTLS1_SCTP_AUTH_LABEL); | |
642 | ||
643 | SSL_export_keying_material(s, sctpauthkey, | |
644 | sizeof(sctpauthkey), labelbuffer, | |
645 | sizeof(labelbuffer), NULL, 0, 0); | |
646 | ||
647 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
648 | sizeof(sctpauthkey), sctpauthkey); | |
649 | #endif | |
650 | ||
36d16f8e BL |
651 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
652 | s->init_num=0; | |
653 | ||
6cf41fec DSH |
654 | if (ret == 2) |
655 | { | |
656 | /* For the ECDH ciphersuites when | |
657 | * the client sends its ECDH pub key in | |
658 | * a certificate, the CertificateVerify | |
659 | * message is not sent. | |
660 | */ | |
661 | s->state=SSL3_ST_SR_FINISHED_A; | |
662 | s->init_num = 0; | |
663 | } | |
04fac500 DSH |
664 | else if (SSL_USE_SIGALGS(s)) |
665 | { | |
666 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
667 | s->init_num=0; | |
668 | if (!s->session->peer) | |
669 | break; | |
670 | /* For sigalgs freeze the handshake buffer | |
671 | * at this point and digest cached records. | |
672 | */ | |
673 | if (!s->s3->handshake_buffer) | |
674 | { | |
4544f0a6 | 675 | SSLerr(SSL_F_DTLS1_ACCEPT,ERR_R_INTERNAL_ERROR); |
04fac500 DSH |
676 | return -1; |
677 | } | |
678 | s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE; | |
679 | if (!ssl3_digest_cached_records(s)) | |
680 | return -1; | |
681 | } | |
6cf41fec DSH |
682 | else |
683 | { | |
684 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
685 | s->init_num=0; | |
36d16f8e | 686 | |
6cf41fec DSH |
687 | /* We need to get hashes here so if there is |
688 | * a client cert, it can be verified */ | |
689 | s->method->ssl3_enc->cert_verify_mac(s, | |
690 | NID_md5, | |
691 | &(s->s3->tmp.cert_verify_md[0])); | |
692 | s->method->ssl3_enc->cert_verify_mac(s, | |
693 | NID_sha1, | |
694 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); | |
695 | } | |
36d16f8e BL |
696 | break; |
697 | ||
698 | case SSL3_ST_SR_CERT_VRFY_A: | |
699 | case SSL3_ST_SR_CERT_VRFY_B: | |
e94a6c0e EK |
700 | /* |
701 | * This *should* be the first time we enable CCS, but be | |
702 | * extra careful about surrounding code changes. We need | |
703 | * to set this here because we don't know if we're | |
704 | * expecting a CertificateVerify or not. | |
705 | */ | |
706 | if (!s->s3->change_cipher_spec) | |
707 | s->d1->change_cipher_spec_ok = 1; | |
36d16f8e BL |
708 | /* we should decide if we expected this one */ |
709 | ret=ssl3_get_cert_verify(s); | |
710 | if (ret <= 0) goto end; | |
7e159e01 DSH |
711 | #ifndef OPENSSL_NO_SCTP |
712 | if (BIO_dgram_is_sctp(SSL_get_wbio(s)) && | |
713 | state == SSL_ST_RENEGOTIATE) | |
714 | s->state=DTLS1_SCTP_ST_SR_READ_SOCK; | |
715 | else | |
716 | #endif | |
717 | s->state=SSL3_ST_SR_FINISHED_A; | |
36d16f8e BL |
718 | s->init_num=0; |
719 | break; | |
720 | ||
721 | case SSL3_ST_SR_FINISHED_A: | |
722 | case SSL3_ST_SR_FINISHED_B: | |
e94a6c0e EK |
723 | /* |
724 | * Enable CCS for resumed handshakes. | |
725 | * In a full handshake, we end up here through | |
726 | * SSL3_ST_SR_CERT_VRFY_B, so change_cipher_spec_ok was | |
727 | * already set. Receiving a CCS clears the flag, so make | |
728 | * sure not to re-enable it to ban duplicates. | |
729 | * s->s3->change_cipher_spec is set when a CCS is | |
730 | * processed in d1_pkt.c, and remains set until | |
731 | * the client's Finished message is read. | |
732 | */ | |
733 | if (!s->s3->change_cipher_spec) | |
734 | s->d1->change_cipher_spec_ok = 1; | |
36d16f8e BL |
735 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, |
736 | SSL3_ST_SR_FINISHED_B); | |
737 | if (ret <= 0) goto end; | |
eb38b26d | 738 | dtls1_stop_timer(s); |
36d16f8e BL |
739 | if (s->hit) |
740 | s->state=SSL_ST_OK; | |
8025e251 DSH |
741 | #ifndef OPENSSL_NO_TLSEXT |
742 | else if (s->tlsext_ticket_expected) | |
743 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
744 | #endif | |
36d16f8e BL |
745 | else |
746 | s->state=SSL3_ST_SW_CHANGE_A; | |
747 | s->init_num=0; | |
748 | break; | |
749 | ||
8025e251 DSH |
750 | #ifndef OPENSSL_NO_TLSEXT |
751 | case SSL3_ST_SW_SESSION_TICKET_A: | |
752 | case SSL3_ST_SW_SESSION_TICKET_B: | |
173e72e6 | 753 | ret=ssl3_send_newsession_ticket(s); |
8025e251 DSH |
754 | if (ret <= 0) goto end; |
755 | s->state=SSL3_ST_SW_CHANGE_A; | |
756 | s->init_num=0; | |
757 | break; | |
758 | ||
759 | case SSL3_ST_SW_CERT_STATUS_A: | |
760 | case SSL3_ST_SW_CERT_STATUS_B: | |
761 | ret=ssl3_send_cert_status(s); | |
762 | if (ret <= 0) goto end; | |
763 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
764 | s->init_num=0; | |
765 | break; | |
766 | ||
767 | #endif | |
768 | ||
36d16f8e BL |
769 | case SSL3_ST_SW_CHANGE_A: |
770 | case SSL3_ST_SW_CHANGE_B: | |
771 | ||
772 | s->session->cipher=s->s3->tmp.new_cipher; | |
773 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
774 | { ret= -1; goto end; } | |
775 | ||
776 | ret=dtls1_send_change_cipher_spec(s, | |
777 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
778 | ||
779 | if (ret <= 0) goto end; | |
7e159e01 DSH |
780 | |
781 | #ifndef OPENSSL_NO_SCTP | |
b9ef52b0 RS |
782 | if (!s->hit) |
783 | { | |
784 | /* Change to new shared key of SCTP-Auth, | |
785 | * will be ignored if no SCTP used. | |
786 | */ | |
787 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); | |
788 | } | |
7e159e01 DSH |
789 | #endif |
790 | ||
36d16f8e BL |
791 | s->state=SSL3_ST_SW_FINISHED_A; |
792 | s->init_num=0; | |
793 | ||
794 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
795 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) | |
796 | { | |
797 | ret= -1; | |
798 | goto end; | |
799 | } | |
800 | ||
801 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
802 | break; | |
803 | ||
804 | case SSL3_ST_SW_FINISHED_A: | |
805 | case SSL3_ST_SW_FINISHED_B: | |
173e72e6 | 806 | ret=ssl3_send_finished(s, |
36d16f8e BL |
807 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, |
808 | s->method->ssl3_enc->server_finished_label, | |
809 | s->method->ssl3_enc->server_finished_label_len); | |
810 | if (ret <= 0) goto end; | |
811 | s->state=SSL3_ST_SW_FLUSH; | |
812 | if (s->hit) | |
b9ef52b0 | 813 | { |
36d16f8e | 814 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
b9ef52b0 RS |
815 | |
816 | #ifndef OPENSSL_NO_SCTP | |
817 | /* Change to new shared key of SCTP-Auth, | |
818 | * will be ignored if no SCTP used. | |
819 | */ | |
820 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); | |
821 | #endif | |
822 | } | |
36d16f8e | 823 | else |
7e159e01 | 824 | { |
36d16f8e | 825 | s->s3->tmp.next_state=SSL_ST_OK; |
7e159e01 DSH |
826 | #ifndef OPENSSL_NO_SCTP |
827 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
828 | { | |
829 | s->d1->next_state = s->s3->tmp.next_state; | |
830 | s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK; | |
831 | } | |
832 | #endif | |
833 | } | |
36d16f8e BL |
834 | s->init_num=0; |
835 | break; | |
836 | ||
837 | case SSL_ST_OK: | |
838 | /* clean a few things up */ | |
839 | ssl3_cleanup_key_block(s); | |
840 | ||
841 | #if 0 | |
842 | BUF_MEM_free(s->init_buf); | |
843 | s->init_buf=NULL; | |
844 | #endif | |
845 | ||
846 | /* remove buffering on output */ | |
847 | ssl_free_wbio_buffer(s); | |
848 | ||
849 | s->init_num=0; | |
850 | ||
44959ee4 | 851 | if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
36d16f8e | 852 | { |
44959ee4 | 853 | s->renegotiate=0; |
36d16f8e BL |
854 | s->new_session=0; |
855 | ||
856 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
857 | ||
858 | s->ctx->stats.sess_accept_good++; | |
859 | /* s->server=1; */ | |
860 | s->handshake_func=dtls1_accept; | |
861 | ||
862 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
863 | } | |
864 | ||
865 | ret = 1; | |
866 | ||
867 | /* done handshaking, next message is client hello */ | |
868 | s->d1->handshake_read_seq = 0; | |
869 | /* next message is server hello */ | |
870 | s->d1->handshake_write_seq = 0; | |
e5fa864f | 871 | s->d1->next_handshake_write_seq = 0; |
36d16f8e BL |
872 | goto end; |
873 | /* break; */ | |
874 | ||
875 | default: | |
beb056b3 | 876 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); |
36d16f8e BL |
877 | ret= -1; |
878 | goto end; | |
879 | /* break; */ | |
880 | } | |
881 | ||
882 | if (!s->s3->tmp.reuse_message && !skip) | |
883 | { | |
884 | if (s->debug) | |
885 | { | |
886 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
887 | goto end; | |
888 | } | |
889 | ||
890 | ||
891 | if ((cb != NULL) && (s->state != state)) | |
892 | { | |
893 | new_state=s->state; | |
894 | s->state=state; | |
895 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
896 | s->state=new_state; | |
897 | } | |
898 | } | |
899 | skip=0; | |
900 | } | |
901 | end: | |
902 | /* BIO_flush(s->wbio); */ | |
903 | ||
904 | s->in_handshake--; | |
7e159e01 DSH |
905 | #ifndef OPENSSL_NO_SCTP |
906 | /* Notify SCTP BIO socket to leave handshake | |
907 | * mode and prevent stream identifier other | |
908 | * than 0. Will be ignored if no SCTP is used. | |
909 | */ | |
910 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL); | |
911 | #endif | |
912 | ||
36d16f8e BL |
913 | if (cb != NULL) |
914 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
915 | return(ret); | |
916 | } | |
917 | ||
36d16f8e BL |
918 | int dtls1_send_hello_verify_request(SSL *s) |
919 | { | |
920 | unsigned int msg_len; | |
921 | unsigned char *msg, *buf, *p; | |
922 | ||
923 | if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) | |
924 | { | |
925 | buf = (unsigned char *)s->init_buf->data; | |
926 | ||
927 | msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); | |
c6913eeb DSH |
928 | /* Always use DTLS 1.0 version: see RFC 6347 */ |
929 | *(p++) = DTLS1_VERSION >> 8; | |
930 | *(p++) = DTLS1_VERSION & 0xFF; | |
36d16f8e | 931 | |
07a9d1a2 DSH |
932 | if (s->ctx->app_gen_cookie_cb == NULL || |
933 | s->ctx->app_gen_cookie_cb(s, s->d1->cookie, | |
934 | &(s->d1->cookie_len)) == 0) | |
7432d073 AP |
935 | { |
936 | SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); | |
937 | return 0; | |
938 | } | |
36d16f8e | 939 | |
a2115c5d | 940 | *(p++) = (unsigned char) s->d1->cookie_len; |
36d16f8e BL |
941 | memcpy(p, s->d1->cookie, s->d1->cookie_len); |
942 | p += s->d1->cookie_len; | |
943 | msg_len = p - msg; | |
944 | ||
945 | dtls1_set_message_header(s, buf, | |
946 | DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len); | |
947 | ||
948 | s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; | |
949 | /* number of bytes to write */ | |
950 | s->init_num=p-buf; | |
951 | s->init_off=0; | |
36d16f8e BL |
952 | } |
953 | ||
954 | /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ | |
955 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
956 | } |