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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 | /* ==================================================================== | |
7 | * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. | |
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> | |
3eeaab4b NL |
124 | #include <openssl/bn.h> |
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()); | |
136 | else | |
137 | return(NULL); | |
138 | } | |
139 | ||
f3b656b2 DSH |
140 | IMPLEMENT_dtls1_meth_func(DTLSv1_server_method, |
141 | dtls1_accept, | |
142 | ssl_undefined_function, | |
143 | dtls1_get_server_method) | |
36d16f8e BL |
144 | |
145 | int dtls1_accept(SSL *s) | |
146 | { | |
147 | BUF_MEM *buf; | |
148 | unsigned long l,Time=time(NULL); | |
149 | void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
150 | long num1; | |
151 | int ret= -1; | |
152 | int new_state,state,skip=0; | |
153 | ||
154 | RAND_add(&Time,sizeof(Time),0); | |
155 | ERR_clear_error(); | |
156 | clear_sys_error(); | |
157 | ||
158 | if (s->info_callback != NULL) | |
159 | cb=s->info_callback; | |
160 | else if (s->ctx->info_callback != NULL) | |
161 | cb=s->ctx->info_callback; | |
162 | ||
163 | /* init things to blank */ | |
164 | s->in_handshake++; | |
165 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
166 | ||
167 | if (s->cert == NULL) | |
168 | { | |
beb056b3 | 169 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
36d16f8e BL |
170 | return(-1); |
171 | } | |
172 | ||
173 | for (;;) | |
174 | { | |
175 | state=s->state; | |
176 | ||
177 | switch (s->state) | |
178 | { | |
179 | case SSL_ST_RENEGOTIATE: | |
180 | s->new_session=1; | |
181 | /* s->state=SSL_ST_ACCEPT; */ | |
182 | ||
183 | case SSL_ST_BEFORE: | |
184 | case SSL_ST_ACCEPT: | |
185 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
186 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
187 | ||
188 | s->server=1; | |
189 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
190 | ||
191 | if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) | |
192 | { | |
beb056b3 | 193 | SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
194 | return -1; |
195 | } | |
196 | s->type=SSL_ST_ACCEPT; | |
197 | ||
198 | if (s->init_buf == NULL) | |
199 | { | |
200 | if ((buf=BUF_MEM_new()) == NULL) | |
201 | { | |
202 | ret= -1; | |
203 | goto end; | |
204 | } | |
205 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
206 | { | |
207 | ret= -1; | |
208 | goto end; | |
209 | } | |
210 | s->init_buf=buf; | |
211 | } | |
212 | ||
213 | if (!ssl3_setup_buffers(s)) | |
214 | { | |
215 | ret= -1; | |
216 | goto end; | |
217 | } | |
218 | ||
219 | s->init_num=0; | |
220 | ||
221 | if (s->state != SSL_ST_RENEGOTIATE) | |
222 | { | |
223 | /* Ok, we now need to push on a buffering BIO so that | |
224 | * the output is sent in a way that TCP likes :-) | |
225 | */ | |
226 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
227 | ||
228 | ssl3_init_finished_mac(s); | |
229 | s->state=SSL3_ST_SR_CLNT_HELLO_A; | |
230 | s->ctx->stats.sess_accept++; | |
231 | } | |
232 | else | |
233 | { | |
234 | /* s->state == SSL_ST_RENEGOTIATE, | |
235 | * we will just send a HelloRequest */ | |
236 | s->ctx->stats.sess_accept_renegotiate++; | |
237 | s->state=SSL3_ST_SW_HELLO_REQ_A; | |
238 | } | |
239 | ||
240 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) | |
241 | s->d1->send_cookie = 1; | |
242 | else | |
243 | s->d1->send_cookie = 0; | |
244 | ||
245 | break; | |
246 | ||
247 | case SSL3_ST_SW_HELLO_REQ_A: | |
248 | case SSL3_ST_SW_HELLO_REQ_B: | |
249 | ||
250 | s->shutdown=0; | |
251 | ret=dtls1_send_hello_request(s); | |
252 | if (ret <= 0) goto end; | |
253 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
254 | s->state=SSL3_ST_SW_FLUSH; | |
255 | s->init_num=0; | |
256 | ||
257 | ssl3_init_finished_mac(s); | |
258 | break; | |
259 | ||
260 | case SSL3_ST_SW_HELLO_REQ_C: | |
261 | s->state=SSL_ST_OK; | |
262 | break; | |
263 | ||
264 | case SSL3_ST_SR_CLNT_HELLO_A: | |
265 | case SSL3_ST_SR_CLNT_HELLO_B: | |
266 | case SSL3_ST_SR_CLNT_HELLO_C: | |
267 | ||
268 | s->shutdown=0; | |
269 | ret=ssl3_get_client_hello(s); | |
270 | if (ret <= 0) goto end; | |
271 | s->new_session = 2; | |
272 | ||
273 | if ( s->d1->send_cookie) | |
274 | s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; | |
275 | else | |
276 | s->state = SSL3_ST_SW_SRVR_HELLO_A; | |
277 | ||
278 | s->init_num=0; | |
279 | break; | |
280 | ||
281 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A: | |
282 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B: | |
283 | ||
284 | ret = dtls1_send_hello_verify_request(s); | |
285 | if ( ret <= 0) goto end; | |
286 | s->d1->send_cookie = 0; | |
287 | s->state=SSL3_ST_SW_FLUSH; | |
288 | s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; | |
289 | break; | |
290 | ||
291 | case SSL3_ST_SW_SRVR_HELLO_A: | |
292 | case SSL3_ST_SW_SRVR_HELLO_B: | |
293 | ret=dtls1_send_server_hello(s); | |
294 | if (ret <= 0) goto end; | |
295 | ||
296 | if (s->hit) | |
297 | s->state=SSL3_ST_SW_CHANGE_A; | |
298 | else | |
299 | s->state=SSL3_ST_SW_CERT_A; | |
300 | s->init_num=0; | |
301 | break; | |
302 | ||
303 | case SSL3_ST_SW_CERT_A: | |
304 | case SSL3_ST_SW_CERT_B: | |
305 | /* Check if it is anon DH */ | |
306 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
307 | { | |
308 | ret=dtls1_send_server_certificate(s); | |
309 | if (ret <= 0) goto end; | |
310 | } | |
311 | else | |
312 | skip=1; | |
313 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
314 | s->init_num=0; | |
315 | break; | |
316 | ||
317 | case SSL3_ST_SW_KEY_EXCH_A: | |
318 | case SSL3_ST_SW_KEY_EXCH_B: | |
319 | l=s->s3->tmp.new_cipher->algorithms; | |
320 | ||
321 | /* clear this, it may get reset by | |
322 | * send_server_key_exchange */ | |
323 | if ((s->options & SSL_OP_EPHEMERAL_RSA) | |
324 | #ifndef OPENSSL_NO_KRB5 | |
325 | && !(l & SSL_KRB5) | |
326 | #endif /* OPENSSL_NO_KRB5 */ | |
327 | ) | |
328 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key | |
329 | * even when forbidden by protocol specs | |
330 | * (handshake may fail as clients are not required to | |
331 | * be able to handle this) */ | |
332 | s->s3->tmp.use_rsa_tmp=1; | |
333 | else | |
334 | s->s3->tmp.use_rsa_tmp=0; | |
335 | ||
336 | /* only send if a DH key exchange, fortezza or | |
337 | * RSA but we have a sign only certificate */ | |
338 | if (s->s3->tmp.use_rsa_tmp | |
339 | || (l & (SSL_DH|SSL_kFZA)) | |
340 | || ((l & SSL_kRSA) | |
341 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL | |
342 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) | |
343 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
344 | ) | |
345 | ) | |
346 | ) | |
347 | ) | |
348 | { | |
349 | ret=dtls1_send_server_key_exchange(s); | |
350 | if (ret <= 0) goto end; | |
351 | } | |
352 | else | |
353 | skip=1; | |
354 | ||
355 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
356 | s->init_num=0; | |
357 | break; | |
358 | ||
359 | case SSL3_ST_SW_CERT_REQ_A: | |
360 | case SSL3_ST_SW_CERT_REQ_B: | |
361 | if (/* don't request cert unless asked for it: */ | |
362 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
363 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
364 | * don't request cert during re-negotiation: */ | |
365 | ((s->session->peer != NULL) && | |
366 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || | |
367 | /* never request cert in anonymous ciphersuites | |
368 | * (see section "Certificate request" in SSL 3 drafts | |
369 | * and in RFC 2246): */ | |
370 | ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) && | |
371 | /* ... except when the application insists on verification | |
372 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
373 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || | |
374 | /* never request cert in Kerberos ciphersuites */ | |
375 | (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)) | |
376 | { | |
377 | /* no cert request */ | |
378 | skip=1; | |
379 | s->s3->tmp.cert_request=0; | |
380 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
381 | } | |
382 | else | |
383 | { | |
384 | s->s3->tmp.cert_request=1; | |
385 | ret=dtls1_send_certificate_request(s); | |
386 | if (ret <= 0) goto end; | |
387 | #ifndef NETSCAPE_HANG_BUG | |
388 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
389 | #else | |
390 | s->state=SSL3_ST_SW_FLUSH; | |
391 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
392 | #endif | |
393 | s->init_num=0; | |
394 | } | |
395 | break; | |
396 | ||
397 | case SSL3_ST_SW_SRVR_DONE_A: | |
398 | case SSL3_ST_SW_SRVR_DONE_B: | |
399 | ret=dtls1_send_server_done(s); | |
400 | if (ret <= 0) goto end; | |
401 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
402 | s->state=SSL3_ST_SW_FLUSH; | |
403 | s->init_num=0; | |
404 | break; | |
405 | ||
406 | case SSL3_ST_SW_FLUSH: | |
407 | /* number of bytes to be flushed */ | |
408 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
409 | if (num1 > 0) | |
410 | { | |
411 | s->rwstate=SSL_WRITING; | |
412 | num1=BIO_flush(s->wbio); | |
413 | if (num1 <= 0) { ret= -1; goto end; } | |
414 | s->rwstate=SSL_NOTHING; | |
415 | } | |
416 | ||
417 | s->state=s->s3->tmp.next_state; | |
418 | break; | |
419 | ||
420 | case SSL3_ST_SR_CERT_A: | |
421 | case SSL3_ST_SR_CERT_B: | |
422 | /* Check for second client hello (MS SGC) */ | |
423 | ret = ssl3_check_client_hello(s); | |
424 | if (ret <= 0) | |
425 | goto end; | |
426 | if (ret == 2) | |
427 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
428 | else { | |
429 | /* could be sent for a DH cert, even if we | |
430 | * have not asked for it :-) */ | |
431 | ret=ssl3_get_client_certificate(s); | |
432 | if (ret <= 0) goto end; | |
433 | s->init_num=0; | |
434 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
435 | } | |
436 | break; | |
437 | ||
438 | case SSL3_ST_SR_KEY_EXCH_A: | |
439 | case SSL3_ST_SR_KEY_EXCH_B: | |
440 | ret=ssl3_get_client_key_exchange(s); | |
441 | if (ret <= 0) goto end; | |
442 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
443 | s->init_num=0; | |
444 | ||
445 | /* We need to get hashes here so if there is | |
446 | * a client cert, it can be verified */ | |
447 | s->method->ssl3_enc->cert_verify_mac(s, | |
448 | &(s->s3->finish_dgst1), | |
449 | &(s->s3->tmp.cert_verify_md[0])); | |
450 | s->method->ssl3_enc->cert_verify_mac(s, | |
451 | &(s->s3->finish_dgst2), | |
452 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); | |
453 | ||
454 | break; | |
455 | ||
456 | case SSL3_ST_SR_CERT_VRFY_A: | |
457 | case SSL3_ST_SR_CERT_VRFY_B: | |
458 | ||
459 | /* we should decide if we expected this one */ | |
460 | ret=ssl3_get_cert_verify(s); | |
461 | if (ret <= 0) goto end; | |
462 | ||
463 | s->state=SSL3_ST_SR_FINISHED_A; | |
464 | s->init_num=0; | |
465 | break; | |
466 | ||
467 | case SSL3_ST_SR_FINISHED_A: | |
468 | case SSL3_ST_SR_FINISHED_B: | |
469 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
470 | SSL3_ST_SR_FINISHED_B); | |
471 | if (ret <= 0) goto end; | |
472 | if (s->hit) | |
473 | s->state=SSL_ST_OK; | |
474 | else | |
475 | s->state=SSL3_ST_SW_CHANGE_A; | |
476 | s->init_num=0; | |
477 | break; | |
478 | ||
479 | case SSL3_ST_SW_CHANGE_A: | |
480 | case SSL3_ST_SW_CHANGE_B: | |
481 | ||
482 | s->session->cipher=s->s3->tmp.new_cipher; | |
483 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
484 | { ret= -1; goto end; } | |
485 | ||
486 | ret=dtls1_send_change_cipher_spec(s, | |
487 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
488 | ||
489 | if (ret <= 0) goto end; | |
490 | s->state=SSL3_ST_SW_FINISHED_A; | |
491 | s->init_num=0; | |
492 | ||
493 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
494 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) | |
495 | { | |
496 | ret= -1; | |
497 | goto end; | |
498 | } | |
499 | ||
500 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
501 | break; | |
502 | ||
503 | case SSL3_ST_SW_FINISHED_A: | |
504 | case SSL3_ST_SW_FINISHED_B: | |
505 | ret=dtls1_send_finished(s, | |
506 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
507 | s->method->ssl3_enc->server_finished_label, | |
508 | s->method->ssl3_enc->server_finished_label_len); | |
509 | if (ret <= 0) goto end; | |
510 | s->state=SSL3_ST_SW_FLUSH; | |
511 | if (s->hit) | |
512 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
513 | else | |
514 | s->s3->tmp.next_state=SSL_ST_OK; | |
515 | s->init_num=0; | |
516 | break; | |
517 | ||
518 | case SSL_ST_OK: | |
519 | /* clean a few things up */ | |
520 | ssl3_cleanup_key_block(s); | |
521 | ||
522 | #if 0 | |
523 | BUF_MEM_free(s->init_buf); | |
524 | s->init_buf=NULL; | |
525 | #endif | |
526 | ||
527 | /* remove buffering on output */ | |
528 | ssl_free_wbio_buffer(s); | |
529 | ||
530 | s->init_num=0; | |
531 | ||
532 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ | |
533 | { | |
534 | /* actually not necessarily a 'new' session unless | |
535 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
536 | ||
537 | s->new_session=0; | |
538 | ||
539 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
540 | ||
541 | s->ctx->stats.sess_accept_good++; | |
542 | /* s->server=1; */ | |
543 | s->handshake_func=dtls1_accept; | |
544 | ||
545 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
546 | } | |
547 | ||
548 | ret = 1; | |
549 | ||
550 | /* done handshaking, next message is client hello */ | |
551 | s->d1->handshake_read_seq = 0; | |
552 | /* next message is server hello */ | |
553 | s->d1->handshake_write_seq = 0; | |
554 | goto end; | |
555 | /* break; */ | |
556 | ||
557 | default: | |
beb056b3 | 558 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); |
36d16f8e BL |
559 | ret= -1; |
560 | goto end; | |
561 | /* break; */ | |
562 | } | |
563 | ||
564 | if (!s->s3->tmp.reuse_message && !skip) | |
565 | { | |
566 | if (s->debug) | |
567 | { | |
568 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
569 | goto end; | |
570 | } | |
571 | ||
572 | ||
573 | if ((cb != NULL) && (s->state != state)) | |
574 | { | |
575 | new_state=s->state; | |
576 | s->state=state; | |
577 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
578 | s->state=new_state; | |
579 | } | |
580 | } | |
581 | skip=0; | |
582 | } | |
583 | end: | |
584 | /* BIO_flush(s->wbio); */ | |
585 | ||
586 | s->in_handshake--; | |
587 | if (cb != NULL) | |
588 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
589 | return(ret); | |
590 | } | |
591 | ||
592 | int dtls1_send_hello_request(SSL *s) | |
593 | { | |
594 | unsigned char *p; | |
595 | ||
596 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
597 | { | |
598 | p=(unsigned char *)s->init_buf->data; | |
599 | p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0); | |
600 | ||
601 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
602 | /* number of bytes to write */ | |
603 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
604 | s->init_off=0; | |
605 | ||
606 | /* no need to buffer this message, since there are no retransmit | |
607 | * requests for it */ | |
608 | } | |
609 | ||
610 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
611 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
612 | } | |
613 | ||
614 | int dtls1_send_hello_verify_request(SSL *s) | |
615 | { | |
616 | unsigned int msg_len; | |
617 | unsigned char *msg, *buf, *p; | |
618 | ||
619 | if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) | |
620 | { | |
621 | buf = (unsigned char *)s->init_buf->data; | |
622 | ||
623 | msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); | |
624 | *(p++) = s->version >> 8; | |
625 | *(p++) = s->version & 0xFF; | |
626 | ||
627 | *(p++) = (unsigned char) s->d1->cookie_len; | |
628 | if ( s->ctx->app_gen_cookie_cb != NULL && | |
629 | s->ctx->app_gen_cookie_cb(s, s->d1->cookie, | |
630 | &(s->d1->cookie_len)) == 0) | |
631 | { | |
632 | SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); | |
633 | return 0; | |
634 | } | |
635 | /* else the cookie is assumed to have | |
636 | * been initialized by the application */ | |
637 | ||
638 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
639 | p += s->d1->cookie_len; | |
640 | msg_len = p - msg; | |
641 | ||
642 | dtls1_set_message_header(s, buf, | |
643 | DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len); | |
644 | ||
645 | s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; | |
646 | /* number of bytes to write */ | |
647 | s->init_num=p-buf; | |
648 | s->init_off=0; | |
649 | ||
650 | /* buffer the message to handle re-xmits */ | |
651 | dtls1_buffer_message(s, 0); | |
652 | } | |
653 | ||
654 | /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ | |
655 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
656 | } | |
657 | ||
658 | int dtls1_send_server_hello(SSL *s) | |
659 | { | |
660 | unsigned char *buf; | |
661 | unsigned char *p,*d; | |
20a90e3a GT |
662 | int i; |
663 | unsigned int sl; | |
36d16f8e BL |
664 | unsigned long l,Time; |
665 | ||
666 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
667 | { | |
668 | buf=(unsigned char *)s->init_buf->data; | |
669 | p=s->s3->server_random; | |
670 | Time=time(NULL); /* Time */ | |
671 | l2n(Time,p); | |
672 | RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); | |
673 | /* Do the message type and length last */ | |
674 | d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); | |
675 | ||
676 | *(p++)=s->version>>8; | |
677 | *(p++)=s->version&0xff; | |
678 | ||
679 | /* Random stuff */ | |
680 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
681 | p+=SSL3_RANDOM_SIZE; | |
682 | ||
683 | /* now in theory we have 3 options to sending back the | |
684 | * session id. If it is a re-use, we send back the | |
685 | * old session-id, if it is a new session, we send | |
686 | * back the new session-id or we send back a 0 length | |
687 | * session-id if we want it to be single use. | |
688 | * Currently I will not implement the '0' length session-id | |
689 | * 12-Jan-98 - I'll now support the '0' length stuff. | |
690 | */ | |
691 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) | |
692 | s->session->session_id_length=0; | |
693 | ||
694 | sl=s->session->session_id_length; | |
695 | if (sl > sizeof s->session->session_id) | |
696 | { | |
beb056b3 | 697 | SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
698 | return -1; |
699 | } | |
700 | *(p++)=sl; | |
701 | memcpy(p,s->session->session_id,sl); | |
702 | p+=sl; | |
703 | ||
704 | /* put the cipher */ | |
705 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
706 | p+=i; | |
707 | ||
708 | /* put the compression method */ | |
09b6c2ef DSH |
709 | #ifdef OPENSSL_NO_COMP |
710 | *(p++)=0; | |
711 | #else | |
36d16f8e BL |
712 | if (s->s3->tmp.new_compression == NULL) |
713 | *(p++)=0; | |
714 | else | |
715 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 716 | #endif |
36d16f8e BL |
717 | |
718 | /* do the header */ | |
719 | l=(p-d); | |
720 | d=buf; | |
721 | ||
722 | d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l); | |
723 | ||
724 | s->state=SSL3_ST_CW_CLNT_HELLO_B; | |
725 | /* number of bytes to write */ | |
726 | s->init_num=p-buf; | |
727 | s->init_off=0; | |
728 | ||
729 | /* buffer the message to handle re-xmits */ | |
730 | dtls1_buffer_message(s, 0); | |
731 | } | |
732 | ||
733 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
734 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
735 | } | |
736 | ||
737 | int dtls1_send_server_done(SSL *s) | |
738 | { | |
739 | unsigned char *p; | |
740 | ||
741 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
742 | { | |
743 | p=(unsigned char *)s->init_buf->data; | |
744 | ||
745 | /* do the header */ | |
746 | p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0); | |
747 | ||
748 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
749 | /* number of bytes to write */ | |
750 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
751 | s->init_off=0; | |
752 | ||
753 | /* buffer the message to handle re-xmits */ | |
754 | dtls1_buffer_message(s, 0); | |
755 | } | |
756 | ||
757 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
758 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
759 | } | |
760 | ||
761 | int dtls1_send_server_key_exchange(SSL *s) | |
762 | { | |
763 | #ifndef OPENSSL_NO_RSA | |
764 | unsigned char *q; | |
765 | int j,num; | |
766 | RSA *rsa; | |
767 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
768 | unsigned int u; | |
769 | #endif | |
770 | #ifndef OPENSSL_NO_DH | |
771 | DH *dh=NULL,*dhp; | |
772 | #endif | |
773 | EVP_PKEY *pkey; | |
774 | unsigned char *p,*d; | |
775 | int al,i; | |
776 | unsigned long type; | |
777 | int n; | |
778 | CERT *cert; | |
779 | BIGNUM *r[4]; | |
780 | int nr[4],kn; | |
781 | BUF_MEM *buf; | |
782 | EVP_MD_CTX md_ctx; | |
783 | ||
784 | EVP_MD_CTX_init(&md_ctx); | |
785 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) | |
786 | { | |
787 | type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK; | |
788 | cert=s->cert; | |
789 | ||
790 | buf=s->init_buf; | |
791 | ||
792 | r[0]=r[1]=r[2]=r[3]=NULL; | |
793 | n=0; | |
794 | #ifndef OPENSSL_NO_RSA | |
795 | if (type & SSL_kRSA) | |
796 | { | |
797 | rsa=cert->rsa_tmp; | |
798 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) | |
799 | { | |
800 | rsa=s->cert->rsa_tmp_cb(s, | |
801 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
802 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
803 | if(rsa == NULL) | |
804 | { | |
805 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 806 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); |
36d16f8e BL |
807 | goto f_err; |
808 | } | |
809 | RSA_up_ref(rsa); | |
810 | cert->rsa_tmp=rsa; | |
811 | } | |
812 | if (rsa == NULL) | |
813 | { | |
814 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 815 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
36d16f8e BL |
816 | goto f_err; |
817 | } | |
818 | r[0]=rsa->n; | |
819 | r[1]=rsa->e; | |
820 | s->s3->tmp.use_rsa_tmp=1; | |
821 | } | |
822 | else | |
823 | #endif | |
824 | #ifndef OPENSSL_NO_DH | |
825 | if (type & SSL_kEDH) | |
826 | { | |
827 | dhp=cert->dh_tmp; | |
828 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) | |
829 | dhp=s->cert->dh_tmp_cb(s, | |
830 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
831 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
832 | if (dhp == NULL) | |
833 | { | |
834 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 835 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
36d16f8e BL |
836 | goto f_err; |
837 | } | |
838 | ||
839 | if (s->s3->tmp.dh != NULL) | |
840 | { | |
841 | DH_free(dh); | |
beb056b3 | 842 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
843 | goto err; |
844 | } | |
845 | ||
846 | if ((dh=DHparams_dup(dhp)) == NULL) | |
847 | { | |
beb056b3 | 848 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
849 | goto err; |
850 | } | |
851 | ||
852 | s->s3->tmp.dh=dh; | |
853 | if ((dhp->pub_key == NULL || | |
854 | dhp->priv_key == NULL || | |
855 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
856 | { | |
857 | if(!DH_generate_key(dh)) | |
858 | { | |
beb056b3 | 859 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, |
36d16f8e BL |
860 | ERR_R_DH_LIB); |
861 | goto err; | |
862 | } | |
863 | } | |
864 | else | |
865 | { | |
866 | dh->pub_key=BN_dup(dhp->pub_key); | |
867 | dh->priv_key=BN_dup(dhp->priv_key); | |
868 | if ((dh->pub_key == NULL) || | |
869 | (dh->priv_key == NULL)) | |
870 | { | |
beb056b3 | 871 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
872 | goto err; |
873 | } | |
874 | } | |
875 | r[0]=dh->p; | |
876 | r[1]=dh->g; | |
877 | r[2]=dh->pub_key; | |
878 | } | |
879 | else | |
880 | #endif | |
881 | { | |
882 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 883 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
36d16f8e BL |
884 | goto f_err; |
885 | } | |
886 | for (i=0; r[i] != NULL; i++) | |
887 | { | |
888 | nr[i]=BN_num_bytes(r[i]); | |
889 | n+=2+nr[i]; | |
890 | } | |
891 | ||
892 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
893 | { | |
894 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
895 | == NULL) | |
896 | { | |
897 | al=SSL_AD_DECODE_ERROR; | |
898 | goto f_err; | |
899 | } | |
900 | kn=EVP_PKEY_size(pkey); | |
901 | } | |
902 | else | |
903 | { | |
904 | pkey=NULL; | |
905 | kn=0; | |
906 | } | |
907 | ||
908 | if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn)) | |
909 | { | |
beb056b3 | 910 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); |
36d16f8e BL |
911 | goto err; |
912 | } | |
913 | d=(unsigned char *)s->init_buf->data; | |
914 | p= &(d[DTLS1_HM_HEADER_LENGTH]); | |
915 | ||
916 | for (i=0; r[i] != NULL; i++) | |
917 | { | |
918 | s2n(nr[i],p); | |
919 | BN_bn2bin(r[i],p); | |
920 | p+=nr[i]; | |
921 | } | |
922 | ||
923 | /* not anonymous */ | |
924 | if (pkey != NULL) | |
925 | { | |
926 | /* n is the length of the params, they start at | |
927 | * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space | |
928 | * at the end. */ | |
929 | #ifndef OPENSSL_NO_RSA | |
930 | if (pkey->type == EVP_PKEY_RSA) | |
931 | { | |
932 | q=md_buf; | |
933 | j=0; | |
934 | for (num=2; num > 0; num--) | |
935 | { | |
936 | EVP_DigestInit_ex(&md_ctx,(num == 2) | |
937 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
938 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
939 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
940 | EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
941 | EVP_DigestFinal_ex(&md_ctx,q, | |
942 | (unsigned int *)&i); | |
943 | q+=i; | |
944 | j+=i; | |
945 | } | |
946 | if (RSA_sign(NID_md5_sha1, md_buf, j, | |
947 | &(p[2]), &u, pkey->pkey.rsa) <= 0) | |
948 | { | |
beb056b3 | 949 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); |
36d16f8e BL |
950 | goto err; |
951 | } | |
952 | s2n(u,p); | |
953 | n+=u+2; | |
954 | } | |
955 | else | |
956 | #endif | |
957 | #if !defined(OPENSSL_NO_DSA) | |
958 | if (pkey->type == EVP_PKEY_DSA) | |
959 | { | |
960 | /* lets do DSS */ | |
961 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); | |
962 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
963 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
964 | EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
965 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
966 | (unsigned int *)&i,pkey)) | |
967 | { | |
beb056b3 | 968 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); |
36d16f8e BL |
969 | goto err; |
970 | } | |
971 | s2n(i,p); | |
972 | n+=i+2; | |
973 | } | |
974 | else | |
975 | #endif | |
976 | { | |
977 | /* Is this error check actually needed? */ | |
978 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 979 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
36d16f8e BL |
980 | goto f_err; |
981 | } | |
982 | } | |
983 | ||
984 | d = dtls1_set_message_header(s, d, | |
985 | SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n); | |
986 | ||
987 | /* we should now have things packed up, so lets send | |
988 | * it off */ | |
989 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
990 | s->init_off=0; | |
991 | ||
992 | /* buffer the message to handle re-xmits */ | |
993 | dtls1_buffer_message(s, 0); | |
994 | } | |
995 | ||
996 | s->state = SSL3_ST_SW_KEY_EXCH_B; | |
997 | EVP_MD_CTX_cleanup(&md_ctx); | |
998 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
999 | f_err: | |
1000 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1001 | err: | |
1002 | EVP_MD_CTX_cleanup(&md_ctx); | |
1003 | return(-1); | |
1004 | } | |
1005 | ||
1006 | int dtls1_send_certificate_request(SSL *s) | |
1007 | { | |
1008 | unsigned char *p,*d; | |
1009 | int i,j,nl,off,n; | |
1010 | STACK_OF(X509_NAME) *sk=NULL; | |
1011 | X509_NAME *name; | |
1012 | BUF_MEM *buf; | |
1013 | ||
1014 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1015 | { | |
1016 | buf=s->init_buf; | |
1017 | ||
1018 | d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]); | |
1019 | ||
1020 | /* get the list of acceptable cert types */ | |
1021 | p++; | |
1022 | n=ssl3_get_req_cert_type(s,p); | |
1023 | d[0]=n; | |
1024 | p+=n; | |
1025 | n++; | |
1026 | ||
1027 | off=n; | |
1028 | p+=2; | |
1029 | n+=2; | |
1030 | ||
1031 | sk=SSL_get_client_CA_list(s); | |
1032 | nl=0; | |
1033 | if (sk != NULL) | |
1034 | { | |
1035 | for (i=0; i<sk_X509_NAME_num(sk); i++) | |
1036 | { | |
1037 | name=sk_X509_NAME_value(sk,i); | |
1038 | j=i2d_X509_NAME(name,NULL); | |
1039 | if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2)) | |
1040 | { | |
beb056b3 | 1041 | SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); |
36d16f8e BL |
1042 | goto err; |
1043 | } | |
1044 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]); | |
1045 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) | |
1046 | { | |
1047 | s2n(j,p); | |
1048 | i2d_X509_NAME(name,&p); | |
1049 | n+=2+j; | |
1050 | nl+=2+j; | |
1051 | } | |
1052 | else | |
1053 | { | |
1054 | d=p; | |
1055 | i2d_X509_NAME(name,&p); | |
1056 | j-=2; s2n(j,d); j+=2; | |
1057 | n+=j; | |
1058 | nl+=j; | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | /* else no CA names */ | |
1063 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]); | |
1064 | s2n(nl,p); | |
1065 | ||
1066 | d=(unsigned char *)buf->data; | |
1067 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1068 | l2n3(n,d); | |
02c5ddf9 | 1069 | s2n(s->d1->handshake_write_seq,d); |
36d16f8e BL |
1070 | s->d1->handshake_write_seq++; |
1071 | ||
1072 | /* we should now have things packed up, so lets send | |
1073 | * it off */ | |
1074 | ||
1075 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
1076 | s->init_off=0; | |
1077 | #ifdef NETSCAPE_HANG_BUG | |
1078 | /* XXX: what to do about this? */ | |
1079 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1080 | ||
1081 | /* do the header */ | |
1082 | *(p++)=SSL3_MT_SERVER_DONE; | |
1083 | *(p++)=0; | |
1084 | *(p++)=0; | |
1085 | *(p++)=0; | |
1086 | s->init_num += 4; | |
1087 | #endif | |
1088 | ||
1089 | /* XDTLS: set message header ? */ | |
1090 | /* buffer the message to handle re-xmits */ | |
1091 | dtls1_buffer_message(s, 0); | |
1092 | ||
1093 | s->state = SSL3_ST_SW_CERT_REQ_B; | |
1094 | } | |
1095 | ||
1096 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1097 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1098 | err: | |
1099 | return(-1); | |
1100 | } | |
1101 | ||
1102 | int dtls1_send_server_certificate(SSL *s) | |
1103 | { | |
1104 | unsigned long l; | |
1105 | X509 *x; | |
1106 | ||
1107 | if (s->state == SSL3_ST_SW_CERT_A) | |
1108 | { | |
1109 | x=ssl_get_server_send_cert(s); | |
1110 | if (x == NULL && | |
1111 | /* VRS: allow null cert if auth == KRB5 */ | |
1112 | (s->s3->tmp.new_cipher->algorithms | |
1113 | & (SSL_MKEY_MASK|SSL_AUTH_MASK)) | |
1114 | != (SSL_aKRB5|SSL_kKRB5)) | |
1115 | { | |
beb056b3 | 1116 | SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
1117 | return(0); |
1118 | } | |
1119 | ||
1120 | l=dtls1_output_cert_chain(s,x); | |
1121 | s->state=SSL3_ST_SW_CERT_B; | |
1122 | s->init_num=(int)l; | |
1123 | s->init_off=0; | |
1124 | ||
1125 | /* buffer the message to handle re-xmits */ | |
1126 | dtls1_buffer_message(s, 0); | |
1127 | } | |
1128 | ||
1129 | /* SSL3_ST_SW_CERT_B */ | |
1130 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1131 | } |