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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> | |
4913b88f NL |
124 | #ifndef OPENSSL_NO_DH |
125 | #include <openssl/dh.h> | |
126 | #endif | |
36d16f8e BL |
127 | |
128 | static SSL_METHOD *dtls1_get_server_method(int ver); | |
129 | static int dtls1_send_hello_verify_request(SSL *s); | |
130 | ||
131 | static SSL_METHOD *dtls1_get_server_method(int ver) | |
132 | { | |
133 | if (ver == DTLS1_VERSION) | |
134 | return(DTLSv1_server_method()); | |
135 | else | |
136 | return(NULL); | |
137 | } | |
138 | ||
222f2246 DSH |
139 | IMPLEMENT_dtls1_meth_func(DTLSv1_server_method, |
140 | dtls1_accept, | |
141 | ssl_undefined_function, | |
142 | dtls1_get_server_method) | |
36d16f8e BL |
143 | |
144 | int dtls1_accept(SSL *s) | |
145 | { | |
146 | BUF_MEM *buf; | |
974d52fd | 147 | unsigned long l,Time=(unsigned long)time(NULL); |
36d16f8e BL |
148 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
149 | long num1; | |
150 | int ret= -1; | |
151 | int new_state,state,skip=0; | |
152 | ||
153 | RAND_add(&Time,sizeof(Time),0); | |
154 | ERR_clear_error(); | |
155 | clear_sys_error(); | |
156 | ||
157 | if (s->info_callback != NULL) | |
158 | cb=s->info_callback; | |
159 | else if (s->ctx->info_callback != NULL) | |
160 | cb=s->ctx->info_callback; | |
161 | ||
162 | /* init things to blank */ | |
163 | s->in_handshake++; | |
164 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
165 | ||
166 | if (s->cert == NULL) | |
167 | { | |
beb056b3 | 168 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
36d16f8e BL |
169 | return(-1); |
170 | } | |
171 | ||
172 | for (;;) | |
173 | { | |
174 | state=s->state; | |
175 | ||
176 | switch (s->state) | |
177 | { | |
178 | case SSL_ST_RENEGOTIATE: | |
179 | s->new_session=1; | |
180 | /* s->state=SSL_ST_ACCEPT; */ | |
181 | ||
182 | case SSL_ST_BEFORE: | |
183 | case SSL_ST_ACCEPT: | |
184 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
185 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
186 | ||
187 | s->server=1; | |
188 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
189 | ||
190 | if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) | |
191 | { | |
beb056b3 | 192 | SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
193 | return -1; |
194 | } | |
195 | s->type=SSL_ST_ACCEPT; | |
196 | ||
197 | if (s->init_buf == NULL) | |
198 | { | |
199 | if ((buf=BUF_MEM_new()) == NULL) | |
200 | { | |
201 | ret= -1; | |
202 | goto end; | |
203 | } | |
204 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
205 | { | |
206 | ret= -1; | |
207 | goto end; | |
208 | } | |
209 | s->init_buf=buf; | |
210 | } | |
211 | ||
212 | if (!ssl3_setup_buffers(s)) | |
213 | { | |
214 | ret= -1; | |
215 | goto end; | |
216 | } | |
217 | ||
218 | s->init_num=0; | |
219 | ||
220 | if (s->state != SSL_ST_RENEGOTIATE) | |
221 | { | |
222 | /* Ok, we now need to push on a buffering BIO so that | |
223 | * the output is sent in a way that TCP likes :-) | |
224 | */ | |
225 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
226 | ||
227 | ssl3_init_finished_mac(s); | |
228 | s->state=SSL3_ST_SR_CLNT_HELLO_A; | |
229 | s->ctx->stats.sess_accept++; | |
230 | } | |
231 | else | |
232 | { | |
233 | /* s->state == SSL_ST_RENEGOTIATE, | |
234 | * we will just send a HelloRequest */ | |
235 | s->ctx->stats.sess_accept_renegotiate++; | |
236 | s->state=SSL3_ST_SW_HELLO_REQ_A; | |
237 | } | |
238 | ||
239 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) | |
240 | s->d1->send_cookie = 1; | |
241 | else | |
242 | s->d1->send_cookie = 0; | |
243 | ||
244 | break; | |
245 | ||
246 | case SSL3_ST_SW_HELLO_REQ_A: | |
247 | case SSL3_ST_SW_HELLO_REQ_B: | |
248 | ||
249 | s->shutdown=0; | |
250 | ret=dtls1_send_hello_request(s); | |
251 | if (ret <= 0) goto end; | |
252 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
253 | s->state=SSL3_ST_SW_FLUSH; | |
254 | s->init_num=0; | |
255 | ||
256 | ssl3_init_finished_mac(s); | |
257 | break; | |
258 | ||
259 | case SSL3_ST_SW_HELLO_REQ_C: | |
260 | s->state=SSL_ST_OK; | |
261 | break; | |
262 | ||
263 | case SSL3_ST_SR_CLNT_HELLO_A: | |
264 | case SSL3_ST_SR_CLNT_HELLO_B: | |
265 | case SSL3_ST_SR_CLNT_HELLO_C: | |
266 | ||
267 | s->shutdown=0; | |
268 | ret=ssl3_get_client_hello(s); | |
269 | if (ret <= 0) goto end; | |
270 | s->new_session = 2; | |
271 | ||
272 | if ( s->d1->send_cookie) | |
273 | s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; | |
274 | else | |
275 | s->state = SSL3_ST_SW_SRVR_HELLO_A; | |
276 | ||
277 | s->init_num=0; | |
278 | break; | |
279 | ||
280 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A: | |
281 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B: | |
282 | ||
283 | ret = dtls1_send_hello_verify_request(s); | |
284 | if ( ret <= 0) goto end; | |
285 | s->d1->send_cookie = 0; | |
286 | s->state=SSL3_ST_SW_FLUSH; | |
287 | s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; | |
4c860910 AP |
288 | |
289 | /* HelloVerifyRequests resets Finished MAC */ | |
290 | if (s->client_version != DTLS1_BAD_VER) | |
291 | ssl3_init_finished_mac(s); | |
36d16f8e BL |
292 | break; |
293 | ||
294 | case SSL3_ST_SW_SRVR_HELLO_A: | |
295 | case SSL3_ST_SW_SRVR_HELLO_B: | |
296 | ret=dtls1_send_server_hello(s); | |
297 | if (ret <= 0) goto end; | |
298 | ||
299 | if (s->hit) | |
300 | s->state=SSL3_ST_SW_CHANGE_A; | |
301 | else | |
302 | s->state=SSL3_ST_SW_CERT_A; | |
303 | s->init_num=0; | |
304 | break; | |
305 | ||
306 | case SSL3_ST_SW_CERT_A: | |
307 | case SSL3_ST_SW_CERT_B: | |
308 | /* Check if it is anon DH */ | |
309 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
310 | { | |
311 | ret=dtls1_send_server_certificate(s); | |
312 | if (ret <= 0) goto end; | |
313 | } | |
314 | else | |
315 | skip=1; | |
316 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
317 | s->init_num=0; | |
318 | break; | |
319 | ||
320 | case SSL3_ST_SW_KEY_EXCH_A: | |
321 | case SSL3_ST_SW_KEY_EXCH_B: | |
322 | l=s->s3->tmp.new_cipher->algorithms; | |
323 | ||
324 | /* clear this, it may get reset by | |
325 | * send_server_key_exchange */ | |
326 | if ((s->options & SSL_OP_EPHEMERAL_RSA) | |
327 | #ifndef OPENSSL_NO_KRB5 | |
328 | && !(l & SSL_KRB5) | |
329 | #endif /* OPENSSL_NO_KRB5 */ | |
330 | ) | |
331 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key | |
332 | * even when forbidden by protocol specs | |
333 | * (handshake may fail as clients are not required to | |
334 | * be able to handle this) */ | |
335 | s->s3->tmp.use_rsa_tmp=1; | |
336 | else | |
337 | s->s3->tmp.use_rsa_tmp=0; | |
338 | ||
339 | /* only send if a DH key exchange, fortezza or | |
340 | * RSA but we have a sign only certificate */ | |
341 | if (s->s3->tmp.use_rsa_tmp | |
342 | || (l & (SSL_DH|SSL_kFZA)) | |
343 | || ((l & SSL_kRSA) | |
344 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL | |
345 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) | |
346 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
347 | ) | |
348 | ) | |
349 | ) | |
350 | ) | |
351 | { | |
352 | ret=dtls1_send_server_key_exchange(s); | |
353 | if (ret <= 0) goto end; | |
354 | } | |
355 | else | |
356 | skip=1; | |
357 | ||
358 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
359 | s->init_num=0; | |
360 | break; | |
361 | ||
362 | case SSL3_ST_SW_CERT_REQ_A: | |
363 | case SSL3_ST_SW_CERT_REQ_B: | |
364 | if (/* don't request cert unless asked for it: */ | |
365 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
366 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
367 | * don't request cert during re-negotiation: */ | |
368 | ((s->session->peer != NULL) && | |
369 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || | |
370 | /* never request cert in anonymous ciphersuites | |
371 | * (see section "Certificate request" in SSL 3 drafts | |
372 | * and in RFC 2246): */ | |
373 | ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) && | |
374 | /* ... except when the application insists on verification | |
375 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
376 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || | |
377 | /* never request cert in Kerberos ciphersuites */ | |
378 | (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)) | |
379 | { | |
380 | /* no cert request */ | |
381 | skip=1; | |
382 | s->s3->tmp.cert_request=0; | |
383 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
384 | } | |
385 | else | |
386 | { | |
387 | s->s3->tmp.cert_request=1; | |
388 | ret=dtls1_send_certificate_request(s); | |
389 | if (ret <= 0) goto end; | |
390 | #ifndef NETSCAPE_HANG_BUG | |
391 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
392 | #else | |
393 | s->state=SSL3_ST_SW_FLUSH; | |
394 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
395 | #endif | |
396 | s->init_num=0; | |
397 | } | |
398 | break; | |
399 | ||
400 | case SSL3_ST_SW_SRVR_DONE_A: | |
401 | case SSL3_ST_SW_SRVR_DONE_B: | |
402 | ret=dtls1_send_server_done(s); | |
403 | if (ret <= 0) goto end; | |
404 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
405 | s->state=SSL3_ST_SW_FLUSH; | |
406 | s->init_num=0; | |
407 | break; | |
408 | ||
409 | case SSL3_ST_SW_FLUSH: | |
410 | /* number of bytes to be flushed */ | |
411 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
412 | if (num1 > 0) | |
413 | { | |
414 | s->rwstate=SSL_WRITING; | |
415 | num1=BIO_flush(s->wbio); | |
416 | if (num1 <= 0) { ret= -1; goto end; } | |
417 | s->rwstate=SSL_NOTHING; | |
418 | } | |
419 | ||
420 | s->state=s->s3->tmp.next_state; | |
421 | break; | |
422 | ||
423 | case SSL3_ST_SR_CERT_A: | |
424 | case SSL3_ST_SR_CERT_B: | |
425 | /* Check for second client hello (MS SGC) */ | |
426 | ret = ssl3_check_client_hello(s); | |
427 | if (ret <= 0) | |
428 | goto end; | |
429 | if (ret == 2) | |
430 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
431 | else { | |
432 | /* could be sent for a DH cert, even if we | |
433 | * have not asked for it :-) */ | |
434 | ret=ssl3_get_client_certificate(s); | |
435 | if (ret <= 0) goto end; | |
436 | s->init_num=0; | |
437 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
438 | } | |
439 | break; | |
440 | ||
441 | case SSL3_ST_SR_KEY_EXCH_A: | |
442 | case SSL3_ST_SR_KEY_EXCH_B: | |
443 | ret=ssl3_get_client_key_exchange(s); | |
444 | if (ret <= 0) goto end; | |
445 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
446 | s->init_num=0; | |
447 | ||
448 | /* We need to get hashes here so if there is | |
449 | * a client cert, it can be verified */ | |
450 | s->method->ssl3_enc->cert_verify_mac(s, | |
451 | &(s->s3->finish_dgst1), | |
452 | &(s->s3->tmp.cert_verify_md[0])); | |
453 | s->method->ssl3_enc->cert_verify_mac(s, | |
454 | &(s->s3->finish_dgst2), | |
455 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); | |
456 | ||
457 | break; | |
458 | ||
459 | case SSL3_ST_SR_CERT_VRFY_A: | |
460 | case SSL3_ST_SR_CERT_VRFY_B: | |
461 | ||
462 | /* we should decide if we expected this one */ | |
463 | ret=ssl3_get_cert_verify(s); | |
464 | if (ret <= 0) goto end; | |
465 | ||
466 | s->state=SSL3_ST_SR_FINISHED_A; | |
467 | s->init_num=0; | |
468 | break; | |
469 | ||
470 | case SSL3_ST_SR_FINISHED_A: | |
471 | case SSL3_ST_SR_FINISHED_B: | |
472 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
473 | SSL3_ST_SR_FINISHED_B); | |
474 | if (ret <= 0) goto end; | |
475 | if (s->hit) | |
476 | s->state=SSL_ST_OK; | |
477 | else | |
478 | s->state=SSL3_ST_SW_CHANGE_A; | |
479 | s->init_num=0; | |
480 | break; | |
481 | ||
482 | case SSL3_ST_SW_CHANGE_A: | |
483 | case SSL3_ST_SW_CHANGE_B: | |
484 | ||
485 | s->session->cipher=s->s3->tmp.new_cipher; | |
486 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
487 | { ret= -1; goto end; } | |
488 | ||
489 | ret=dtls1_send_change_cipher_spec(s, | |
490 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
491 | ||
492 | if (ret <= 0) goto end; | |
493 | s->state=SSL3_ST_SW_FINISHED_A; | |
494 | s->init_num=0; | |
495 | ||
496 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
497 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) | |
498 | { | |
499 | ret= -1; | |
500 | goto end; | |
501 | } | |
502 | ||
503 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
504 | break; | |
505 | ||
506 | case SSL3_ST_SW_FINISHED_A: | |
507 | case SSL3_ST_SW_FINISHED_B: | |
508 | ret=dtls1_send_finished(s, | |
509 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
510 | s->method->ssl3_enc->server_finished_label, | |
511 | s->method->ssl3_enc->server_finished_label_len); | |
512 | if (ret <= 0) goto end; | |
513 | s->state=SSL3_ST_SW_FLUSH; | |
514 | if (s->hit) | |
515 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
516 | else | |
517 | s->s3->tmp.next_state=SSL_ST_OK; | |
518 | s->init_num=0; | |
519 | break; | |
520 | ||
521 | case SSL_ST_OK: | |
522 | /* clean a few things up */ | |
523 | ssl3_cleanup_key_block(s); | |
524 | ||
525 | #if 0 | |
526 | BUF_MEM_free(s->init_buf); | |
527 | s->init_buf=NULL; | |
528 | #endif | |
529 | ||
530 | /* remove buffering on output */ | |
531 | ssl_free_wbio_buffer(s); | |
532 | ||
533 | s->init_num=0; | |
534 | ||
535 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ | |
536 | { | |
537 | /* actually not necessarily a 'new' session unless | |
538 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
539 | ||
540 | s->new_session=0; | |
541 | ||
542 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
543 | ||
544 | s->ctx->stats.sess_accept_good++; | |
545 | /* s->server=1; */ | |
546 | s->handshake_func=dtls1_accept; | |
547 | ||
548 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
549 | } | |
550 | ||
551 | ret = 1; | |
552 | ||
553 | /* done handshaking, next message is client hello */ | |
554 | s->d1->handshake_read_seq = 0; | |
555 | /* next message is server hello */ | |
556 | s->d1->handshake_write_seq = 0; | |
557 | goto end; | |
558 | /* break; */ | |
559 | ||
560 | default: | |
beb056b3 | 561 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); |
36d16f8e BL |
562 | ret= -1; |
563 | goto end; | |
564 | /* break; */ | |
565 | } | |
566 | ||
567 | if (!s->s3->tmp.reuse_message && !skip) | |
568 | { | |
569 | if (s->debug) | |
570 | { | |
571 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
572 | goto end; | |
573 | } | |
574 | ||
575 | ||
576 | if ((cb != NULL) && (s->state != state)) | |
577 | { | |
578 | new_state=s->state; | |
579 | s->state=state; | |
580 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
581 | s->state=new_state; | |
582 | } | |
583 | } | |
584 | skip=0; | |
585 | } | |
586 | end: | |
587 | /* BIO_flush(s->wbio); */ | |
588 | ||
589 | s->in_handshake--; | |
590 | if (cb != NULL) | |
591 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
592 | return(ret); | |
593 | } | |
594 | ||
595 | int dtls1_send_hello_request(SSL *s) | |
596 | { | |
597 | unsigned char *p; | |
598 | ||
599 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
600 | { | |
601 | p=(unsigned char *)s->init_buf->data; | |
602 | p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0); | |
603 | ||
604 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
605 | /* number of bytes to write */ | |
606 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
607 | s->init_off=0; | |
608 | ||
609 | /* no need to buffer this message, since there are no retransmit | |
610 | * requests for it */ | |
611 | } | |
612 | ||
613 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
614 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
615 | } | |
616 | ||
617 | int dtls1_send_hello_verify_request(SSL *s) | |
618 | { | |
619 | unsigned int msg_len; | |
620 | unsigned char *msg, *buf, *p; | |
621 | ||
622 | if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) | |
623 | { | |
624 | buf = (unsigned char *)s->init_buf->data; | |
625 | ||
626 | msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); | |
c4b0d787 AP |
627 | if (s->client_version == DTLS1_BAD_VER) |
628 | *(p++) = DTLS1_BAD_VER>>8, | |
629 | *(p++) = DTLS1_BAD_VER&0xff; | |
630 | else | |
631 | *(p++) = s->version >> 8, | |
632 | *(p++) = s->version & 0xFF; | |
36d16f8e | 633 | |
c4b0d787 AP |
634 | if (s->ctx->app_gen_cookie_cb != NULL && |
635 | s->ctx->app_gen_cookie_cb(s, s->d1->cookie, | |
636 | &(s->d1->cookie_len)) == 0) | |
637 | { | |
36d16f8e | 638 | SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); |
c4b0d787 AP |
639 | return 0; |
640 | } | |
641 | /* else the cookie is assumed to have | |
642 | * been initialized by the application */ | |
36d16f8e | 643 | |
49f42ec0 | 644 | *(p++) = (unsigned char) s->d1->cookie_len; |
36d16f8e BL |
645 | memcpy(p, s->d1->cookie, s->d1->cookie_len); |
646 | p += s->d1->cookie_len; | |
647 | msg_len = p - msg; | |
648 | ||
649 | dtls1_set_message_header(s, buf, | |
650 | DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len); | |
651 | ||
652 | s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; | |
653 | /* number of bytes to write */ | |
654 | s->init_num=p-buf; | |
655 | s->init_off=0; | |
656 | ||
657 | /* buffer the message to handle re-xmits */ | |
658 | dtls1_buffer_message(s, 0); | |
659 | } | |
660 | ||
661 | /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ | |
662 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
663 | } | |
664 | ||
665 | int dtls1_send_server_hello(SSL *s) | |
666 | { | |
667 | unsigned char *buf; | |
668 | unsigned char *p,*d; | |
7f622f6c NL |
669 | int i; |
670 | unsigned int sl; | |
36d16f8e BL |
671 | unsigned long l,Time; |
672 | ||
673 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
674 | { | |
675 | buf=(unsigned char *)s->init_buf->data; | |
676 | p=s->s3->server_random; | |
974d52fd | 677 | Time=(unsigned long)time(NULL); /* Time */ |
36d16f8e BL |
678 | l2n(Time,p); |
679 | RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); | |
680 | /* Do the message type and length last */ | |
681 | d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); | |
682 | ||
c4b0d787 AP |
683 | if (s->client_version == DTLS1_BAD_VER) |
684 | *(p++)=DTLS1_BAD_VER>>8, | |
685 | *(p++)=DTLS1_BAD_VER&0xff; | |
686 | else | |
687 | *(p++)=s->version>>8, | |
688 | *(p++)=s->version&0xff; | |
36d16f8e BL |
689 | |
690 | /* Random stuff */ | |
691 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
692 | p+=SSL3_RANDOM_SIZE; | |
693 | ||
694 | /* now in theory we have 3 options to sending back the | |
695 | * session id. If it is a re-use, we send back the | |
696 | * old session-id, if it is a new session, we send | |
697 | * back the new session-id or we send back a 0 length | |
698 | * session-id if we want it to be single use. | |
699 | * Currently I will not implement the '0' length session-id | |
700 | * 12-Jan-98 - I'll now support the '0' length stuff. | |
701 | */ | |
702 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) | |
703 | s->session->session_id_length=0; | |
704 | ||
705 | sl=s->session->session_id_length; | |
706 | if (sl > sizeof s->session->session_id) | |
707 | { | |
beb056b3 | 708 | SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
709 | return -1; |
710 | } | |
711 | *(p++)=sl; | |
712 | memcpy(p,s->session->session_id,sl); | |
713 | p+=sl; | |
714 | ||
715 | /* put the cipher */ | |
716 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
717 | p+=i; | |
718 | ||
719 | /* put the compression method */ | |
54f51116 DSH |
720 | #ifdef OPENSSL_NO_COMP |
721 | *(p++)=0; | |
722 | #else | |
36d16f8e BL |
723 | if (s->s3->tmp.new_compression == NULL) |
724 | *(p++)=0; | |
725 | else | |
726 | *(p++)=s->s3->tmp.new_compression->id; | |
54f51116 | 727 | #endif |
36d16f8e BL |
728 | |
729 | /* do the header */ | |
730 | l=(p-d); | |
731 | d=buf; | |
732 | ||
733 | d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l); | |
734 | ||
200d00c8 | 735 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
36d16f8e BL |
736 | /* number of bytes to write */ |
737 | s->init_num=p-buf; | |
738 | s->init_off=0; | |
739 | ||
740 | /* buffer the message to handle re-xmits */ | |
741 | dtls1_buffer_message(s, 0); | |
742 | } | |
743 | ||
200d00c8 | 744 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
36d16f8e BL |
745 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
746 | } | |
747 | ||
748 | int dtls1_send_server_done(SSL *s) | |
749 | { | |
750 | unsigned char *p; | |
751 | ||
752 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
753 | { | |
754 | p=(unsigned char *)s->init_buf->data; | |
755 | ||
756 | /* do the header */ | |
757 | p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0); | |
758 | ||
759 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
760 | /* number of bytes to write */ | |
761 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
762 | s->init_off=0; | |
763 | ||
764 | /* buffer the message to handle re-xmits */ | |
765 | dtls1_buffer_message(s, 0); | |
766 | } | |
767 | ||
200d00c8 | 768 | /* SSL3_ST_SW_SRVR_DONE_B */ |
36d16f8e BL |
769 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
770 | } | |
771 | ||
772 | int dtls1_send_server_key_exchange(SSL *s) | |
773 | { | |
774 | #ifndef OPENSSL_NO_RSA | |
775 | unsigned char *q; | |
776 | int j,num; | |
777 | RSA *rsa; | |
778 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
779 | unsigned int u; | |
780 | #endif | |
781 | #ifndef OPENSSL_NO_DH | |
782 | DH *dh=NULL,*dhp; | |
783 | #endif | |
784 | EVP_PKEY *pkey; | |
785 | unsigned char *p,*d; | |
786 | int al,i; | |
787 | unsigned long type; | |
788 | int n; | |
789 | CERT *cert; | |
790 | BIGNUM *r[4]; | |
791 | int nr[4],kn; | |
792 | BUF_MEM *buf; | |
793 | EVP_MD_CTX md_ctx; | |
794 | ||
795 | EVP_MD_CTX_init(&md_ctx); | |
796 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) | |
797 | { | |
798 | type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK; | |
799 | cert=s->cert; | |
800 | ||
801 | buf=s->init_buf; | |
802 | ||
803 | r[0]=r[1]=r[2]=r[3]=NULL; | |
804 | n=0; | |
805 | #ifndef OPENSSL_NO_RSA | |
806 | if (type & SSL_kRSA) | |
807 | { | |
808 | rsa=cert->rsa_tmp; | |
809 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) | |
810 | { | |
811 | rsa=s->cert->rsa_tmp_cb(s, | |
812 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
813 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
814 | if(rsa == NULL) | |
815 | { | |
816 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 817 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); |
36d16f8e BL |
818 | goto f_err; |
819 | } | |
820 | RSA_up_ref(rsa); | |
821 | cert->rsa_tmp=rsa; | |
822 | } | |
823 | if (rsa == NULL) | |
824 | { | |
825 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 826 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
36d16f8e BL |
827 | goto f_err; |
828 | } | |
829 | r[0]=rsa->n; | |
830 | r[1]=rsa->e; | |
831 | s->s3->tmp.use_rsa_tmp=1; | |
832 | } | |
833 | else | |
834 | #endif | |
835 | #ifndef OPENSSL_NO_DH | |
836 | if (type & SSL_kEDH) | |
837 | { | |
838 | dhp=cert->dh_tmp; | |
839 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) | |
840 | dhp=s->cert->dh_tmp_cb(s, | |
841 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
842 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
843 | if (dhp == NULL) | |
844 | { | |
845 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 846 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
36d16f8e BL |
847 | goto f_err; |
848 | } | |
849 | ||
850 | if (s->s3->tmp.dh != NULL) | |
851 | { | |
852 | DH_free(dh); | |
beb056b3 | 853 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
854 | goto err; |
855 | } | |
856 | ||
857 | if ((dh=DHparams_dup(dhp)) == NULL) | |
858 | { | |
beb056b3 | 859 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
860 | goto err; |
861 | } | |
862 | ||
863 | s->s3->tmp.dh=dh; | |
864 | if ((dhp->pub_key == NULL || | |
865 | dhp->priv_key == NULL || | |
866 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
867 | { | |
868 | if(!DH_generate_key(dh)) | |
869 | { | |
beb056b3 | 870 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, |
36d16f8e BL |
871 | ERR_R_DH_LIB); |
872 | goto err; | |
873 | } | |
874 | } | |
875 | else | |
876 | { | |
877 | dh->pub_key=BN_dup(dhp->pub_key); | |
878 | dh->priv_key=BN_dup(dhp->priv_key); | |
879 | if ((dh->pub_key == NULL) || | |
880 | (dh->priv_key == NULL)) | |
881 | { | |
beb056b3 | 882 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
883 | goto err; |
884 | } | |
885 | } | |
886 | r[0]=dh->p; | |
887 | r[1]=dh->g; | |
888 | r[2]=dh->pub_key; | |
889 | } | |
890 | else | |
891 | #endif | |
892 | { | |
893 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 894 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
36d16f8e BL |
895 | goto f_err; |
896 | } | |
897 | for (i=0; r[i] != NULL; i++) | |
898 | { | |
899 | nr[i]=BN_num_bytes(r[i]); | |
900 | n+=2+nr[i]; | |
901 | } | |
902 | ||
903 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
904 | { | |
905 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
906 | == NULL) | |
907 | { | |
908 | al=SSL_AD_DECODE_ERROR; | |
909 | goto f_err; | |
910 | } | |
911 | kn=EVP_PKEY_size(pkey); | |
912 | } | |
913 | else | |
914 | { | |
915 | pkey=NULL; | |
916 | kn=0; | |
917 | } | |
918 | ||
919 | if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn)) | |
920 | { | |
beb056b3 | 921 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); |
36d16f8e BL |
922 | goto err; |
923 | } | |
924 | d=(unsigned char *)s->init_buf->data; | |
925 | p= &(d[DTLS1_HM_HEADER_LENGTH]); | |
926 | ||
927 | for (i=0; r[i] != NULL; i++) | |
928 | { | |
929 | s2n(nr[i],p); | |
930 | BN_bn2bin(r[i],p); | |
931 | p+=nr[i]; | |
932 | } | |
933 | ||
934 | /* not anonymous */ | |
935 | if (pkey != NULL) | |
936 | { | |
937 | /* n is the length of the params, they start at | |
938 | * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space | |
939 | * at the end. */ | |
940 | #ifndef OPENSSL_NO_RSA | |
941 | if (pkey->type == EVP_PKEY_RSA) | |
942 | { | |
943 | q=md_buf; | |
944 | j=0; | |
945 | for (num=2; num > 0; num--) | |
946 | { | |
947 | EVP_DigestInit_ex(&md_ctx,(num == 2) | |
948 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
949 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
950 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
951 | EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
952 | EVP_DigestFinal_ex(&md_ctx,q, | |
953 | (unsigned int *)&i); | |
954 | q+=i; | |
955 | j+=i; | |
956 | } | |
957 | if (RSA_sign(NID_md5_sha1, md_buf, j, | |
958 | &(p[2]), &u, pkey->pkey.rsa) <= 0) | |
959 | { | |
beb056b3 | 960 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); |
36d16f8e BL |
961 | goto err; |
962 | } | |
963 | s2n(u,p); | |
964 | n+=u+2; | |
965 | } | |
966 | else | |
967 | #endif | |
968 | #if !defined(OPENSSL_NO_DSA) | |
969 | if (pkey->type == EVP_PKEY_DSA) | |
970 | { | |
971 | /* lets do DSS */ | |
972 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); | |
973 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
974 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
975 | EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
976 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
977 | (unsigned int *)&i,pkey)) | |
978 | { | |
beb056b3 | 979 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); |
36d16f8e BL |
980 | goto err; |
981 | } | |
982 | s2n(i,p); | |
983 | n+=i+2; | |
984 | } | |
985 | else | |
986 | #endif | |
987 | { | |
988 | /* Is this error check actually needed? */ | |
989 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 990 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
36d16f8e BL |
991 | goto f_err; |
992 | } | |
993 | } | |
994 | ||
995 | d = dtls1_set_message_header(s, d, | |
996 | SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n); | |
997 | ||
998 | /* we should now have things packed up, so lets send | |
999 | * it off */ | |
1000 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
1001 | s->init_off=0; | |
1002 | ||
1003 | /* buffer the message to handle re-xmits */ | |
1004 | dtls1_buffer_message(s, 0); | |
1005 | } | |
1006 | ||
1007 | s->state = SSL3_ST_SW_KEY_EXCH_B; | |
1008 | EVP_MD_CTX_cleanup(&md_ctx); | |
1009 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1010 | f_err: | |
1011 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1012 | err: | |
1013 | EVP_MD_CTX_cleanup(&md_ctx); | |
1014 | return(-1); | |
1015 | } | |
1016 | ||
1017 | int dtls1_send_certificate_request(SSL *s) | |
1018 | { | |
1019 | unsigned char *p,*d; | |
1020 | int i,j,nl,off,n; | |
1021 | STACK_OF(X509_NAME) *sk=NULL; | |
1022 | X509_NAME *name; | |
1023 | BUF_MEM *buf; | |
25b0e072 | 1024 | unsigned int msg_len; |
36d16f8e BL |
1025 | |
1026 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1027 | { | |
1028 | buf=s->init_buf; | |
1029 | ||
1030 | d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]); | |
1031 | ||
1032 | /* get the list of acceptable cert types */ | |
1033 | p++; | |
1034 | n=ssl3_get_req_cert_type(s,p); | |
1035 | d[0]=n; | |
1036 | p+=n; | |
1037 | n++; | |
1038 | ||
1039 | off=n; | |
1040 | p+=2; | |
1041 | n+=2; | |
1042 | ||
1043 | sk=SSL_get_client_CA_list(s); | |
1044 | nl=0; | |
1045 | if (sk != NULL) | |
1046 | { | |
1047 | for (i=0; i<sk_X509_NAME_num(sk); i++) | |
1048 | { | |
1049 | name=sk_X509_NAME_value(sk,i); | |
1050 | j=i2d_X509_NAME(name,NULL); | |
1051 | if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2)) | |
1052 | { | |
beb056b3 | 1053 | SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); |
36d16f8e BL |
1054 | goto err; |
1055 | } | |
1056 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]); | |
1057 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) | |
1058 | { | |
1059 | s2n(j,p); | |
1060 | i2d_X509_NAME(name,&p); | |
1061 | n+=2+j; | |
1062 | nl+=2+j; | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | d=p; | |
1067 | i2d_X509_NAME(name,&p); | |
1068 | j-=2; s2n(j,d); j+=2; | |
1069 | n+=j; | |
1070 | nl+=j; | |
1071 | } | |
1072 | } | |
1073 | } | |
1074 | /* else no CA names */ | |
1075 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]); | |
1076 | s2n(nl,p); | |
1077 | ||
1078 | d=(unsigned char *)buf->data; | |
1079 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1080 | l2n3(n,d); | |
d28b7799 | 1081 | s2n(s->d1->handshake_write_seq,d); |
36d16f8e BL |
1082 | s->d1->handshake_write_seq++; |
1083 | ||
1084 | /* we should now have things packed up, so lets send | |
1085 | * it off */ | |
1086 | ||
1087 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
1088 | s->init_off=0; | |
1089 | #ifdef NETSCAPE_HANG_BUG | |
1090 | /* XXX: what to do about this? */ | |
1091 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1092 | ||
1093 | /* do the header */ | |
1094 | *(p++)=SSL3_MT_SERVER_DONE; | |
1095 | *(p++)=0; | |
1096 | *(p++)=0; | |
1097 | *(p++)=0; | |
1098 | s->init_num += 4; | |
1099 | #endif | |
1100 | ||
1101 | /* XDTLS: set message header ? */ | |
25b0e072 | 1102 | msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH; |
aab1ec3f | 1103 | dtls1_set_message_header(s, (void *)s->init_buf->data, |
25b0e072 DSH |
1104 | SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len); |
1105 | ||
36d16f8e BL |
1106 | /* buffer the message to handle re-xmits */ |
1107 | dtls1_buffer_message(s, 0); | |
1108 | ||
1109 | s->state = SSL3_ST_SW_CERT_REQ_B; | |
1110 | } | |
1111 | ||
1112 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1113 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1114 | err: | |
1115 | return(-1); | |
1116 | } | |
1117 | ||
1118 | int dtls1_send_server_certificate(SSL *s) | |
1119 | { | |
1120 | unsigned long l; | |
1121 | X509 *x; | |
1122 | ||
1123 | if (s->state == SSL3_ST_SW_CERT_A) | |
1124 | { | |
1125 | x=ssl_get_server_send_cert(s); | |
1126 | if (x == NULL && | |
1127 | /* VRS: allow null cert if auth == KRB5 */ | |
1128 | (s->s3->tmp.new_cipher->algorithms | |
1129 | & (SSL_MKEY_MASK|SSL_AUTH_MASK)) | |
1130 | != (SSL_aKRB5|SSL_kKRB5)) | |
1131 | { | |
beb056b3 | 1132 | SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
1133 | return(0); |
1134 | } | |
1135 | ||
1136 | l=dtls1_output_cert_chain(s,x); | |
1137 | s->state=SSL3_ST_SW_CERT_B; | |
1138 | s->init_num=(int)l; | |
1139 | s->init_off=0; | |
1140 | ||
1141 | /* buffer the message to handle re-xmits */ | |
1142 | dtls1_buffer_message(s, 0); | |
1143 | } | |
1144 | ||
1145 | /* SSL3_ST_SW_CERT_B */ | |
1146 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1147 | } |