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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> | |
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; | |
7e69565f | 148 | unsigned long Time=(unsigned long)time(NULL); |
36d16f8e BL |
149 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
150 | long num1; | |
52b8dad8 | 151 | unsigned long alg_k; |
36d16f8e BL |
152 | int ret= -1; |
153 | int new_state,state,skip=0; | |
154 | ||
155 | RAND_add(&Time,sizeof(Time),0); | |
156 | ERR_clear_error(); | |
157 | clear_sys_error(); | |
158 | ||
159 | if (s->info_callback != NULL) | |
160 | cb=s->info_callback; | |
161 | else if (s->ctx->info_callback != NULL) | |
162 | cb=s->ctx->info_callback; | |
163 | ||
164 | /* init things to blank */ | |
165 | s->in_handshake++; | |
166 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
167 | ||
168 | if (s->cert == NULL) | |
169 | { | |
beb056b3 | 170 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
36d16f8e BL |
171 | return(-1); |
172 | } | |
173 | ||
174 | for (;;) | |
175 | { | |
176 | state=s->state; | |
177 | ||
178 | switch (s->state) | |
179 | { | |
180 | case SSL_ST_RENEGOTIATE: | |
181 | s->new_session=1; | |
182 | /* s->state=SSL_ST_ACCEPT; */ | |
183 | ||
184 | case SSL_ST_BEFORE: | |
185 | case SSL_ST_ACCEPT: | |
186 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
187 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
188 | ||
189 | s->server=1; | |
190 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
191 | ||
192 | if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) | |
193 | { | |
beb056b3 | 194 | SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
195 | return -1; |
196 | } | |
197 | s->type=SSL_ST_ACCEPT; | |
198 | ||
199 | if (s->init_buf == NULL) | |
200 | { | |
201 | if ((buf=BUF_MEM_new()) == NULL) | |
202 | { | |
203 | ret= -1; | |
204 | goto end; | |
205 | } | |
206 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
207 | { | |
208 | ret= -1; | |
209 | goto end; | |
210 | } | |
211 | s->init_buf=buf; | |
212 | } | |
213 | ||
214 | if (!ssl3_setup_buffers(s)) | |
215 | { | |
216 | ret= -1; | |
217 | goto end; | |
218 | } | |
219 | ||
220 | s->init_num=0; | |
221 | ||
222 | if (s->state != SSL_ST_RENEGOTIATE) | |
223 | { | |
224 | /* Ok, we now need to push on a buffering BIO so that | |
225 | * the output is sent in a way that TCP likes :-) | |
226 | */ | |
227 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
228 | ||
229 | ssl3_init_finished_mac(s); | |
230 | s->state=SSL3_ST_SR_CLNT_HELLO_A; | |
231 | s->ctx->stats.sess_accept++; | |
232 | } | |
233 | else | |
234 | { | |
235 | /* s->state == SSL_ST_RENEGOTIATE, | |
236 | * we will just send a HelloRequest */ | |
237 | s->ctx->stats.sess_accept_renegotiate++; | |
238 | s->state=SSL3_ST_SW_HELLO_REQ_A; | |
239 | } | |
240 | ||
52b8dad8 BM |
241 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) |
242 | s->d1->send_cookie = 1; | |
243 | else | |
244 | s->d1->send_cookie = 0; | |
245 | ||
36d16f8e BL |
246 | break; |
247 | ||
248 | case SSL3_ST_SW_HELLO_REQ_A: | |
249 | case SSL3_ST_SW_HELLO_REQ_B: | |
250 | ||
251 | s->shutdown=0; | |
252 | ret=dtls1_send_hello_request(s); | |
253 | if (ret <= 0) goto end; | |
254 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
255 | s->state=SSL3_ST_SW_FLUSH; | |
256 | s->init_num=0; | |
257 | ||
258 | ssl3_init_finished_mac(s); | |
259 | break; | |
260 | ||
261 | case SSL3_ST_SW_HELLO_REQ_C: | |
262 | s->state=SSL_ST_OK; | |
263 | break; | |
264 | ||
265 | case SSL3_ST_SR_CLNT_HELLO_A: | |
266 | case SSL3_ST_SR_CLNT_HELLO_B: | |
267 | case SSL3_ST_SR_CLNT_HELLO_C: | |
268 | ||
269 | s->shutdown=0; | |
270 | ret=ssl3_get_client_hello(s); | |
271 | if (ret <= 0) goto end; | |
272 | s->new_session = 2; | |
273 | ||
52b8dad8 | 274 | if (s->d1->send_cookie) |
36d16f8e BL |
275 | s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; |
276 | else | |
277 | s->state = SSL3_ST_SW_SRVR_HELLO_A; | |
278 | ||
279 | s->init_num=0; | |
280 | break; | |
281 | ||
282 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A: | |
283 | case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B: | |
284 | ||
285 | ret = dtls1_send_hello_verify_request(s); | |
286 | if ( ret <= 0) goto end; | |
287 | s->d1->send_cookie = 0; | |
288 | s->state=SSL3_ST_SW_FLUSH; | |
289 | s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; | |
290 | break; | |
291 | ||
292 | case SSL3_ST_SW_SRVR_HELLO_A: | |
293 | case SSL3_ST_SW_SRVR_HELLO_B: | |
294 | ret=dtls1_send_server_hello(s); | |
295 | if (ret <= 0) goto end; | |
296 | ||
297 | if (s->hit) | |
298 | s->state=SSL3_ST_SW_CHANGE_A; | |
299 | else | |
300 | s->state=SSL3_ST_SW_CERT_A; | |
301 | s->init_num=0; | |
302 | break; | |
303 | ||
304 | case SSL3_ST_SW_CERT_A: | |
305 | case SSL3_ST_SW_CERT_B: | |
306 | /* Check if it is anon DH */ | |
52b8dad8 | 307 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
36d16f8e BL |
308 | { |
309 | ret=dtls1_send_server_certificate(s); | |
310 | if (ret <= 0) goto end; | |
311 | } | |
312 | else | |
313 | skip=1; | |
314 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
315 | s->init_num=0; | |
316 | break; | |
317 | ||
318 | case SSL3_ST_SW_KEY_EXCH_A: | |
319 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 320 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
36d16f8e BL |
321 | |
322 | /* clear this, it may get reset by | |
323 | * send_server_key_exchange */ | |
324 | if ((s->options & SSL_OP_EPHEMERAL_RSA) | |
325 | #ifndef OPENSSL_NO_KRB5 | |
52b8dad8 | 326 | && !(alg_k & SSL_kKRB5) |
36d16f8e BL |
327 | #endif /* OPENSSL_NO_KRB5 */ |
328 | ) | |
329 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key | |
330 | * even when forbidden by protocol specs | |
331 | * (handshake may fail as clients are not required to | |
332 | * be able to handle this) */ | |
333 | s->s3->tmp.use_rsa_tmp=1; | |
334 | else | |
335 | s->s3->tmp.use_rsa_tmp=0; | |
336 | ||
89bbe14c | 337 | /* only send if a DH key exchange or |
36d16f8e BL |
338 | * RSA but we have a sign only certificate */ |
339 | if (s->s3->tmp.use_rsa_tmp | |
52b8dad8 BM |
340 | || (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
341 | || ((alg_k & SSL_kRSA) | |
36d16f8e BL |
342 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
343 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) | |
344 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
345 | ) | |
346 | ) | |
347 | ) | |
348 | ) | |
349 | { | |
350 | ret=dtls1_send_server_key_exchange(s); | |
351 | if (ret <= 0) goto end; | |
352 | } | |
353 | else | |
354 | skip=1; | |
355 | ||
356 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
357 | s->init_num=0; | |
358 | break; | |
359 | ||
360 | case SSL3_ST_SW_CERT_REQ_A: | |
361 | case SSL3_ST_SW_CERT_REQ_B: | |
362 | if (/* don't request cert unless asked for it: */ | |
363 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
364 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
365 | * don't request cert during re-negotiation: */ | |
366 | ((s->session->peer != NULL) && | |
367 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || | |
368 | /* never request cert in anonymous ciphersuites | |
369 | * (see section "Certificate request" in SSL 3 drafts | |
370 | * and in RFC 2246): */ | |
52b8dad8 | 371 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
36d16f8e BL |
372 | /* ... except when the application insists on verification |
373 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
374 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || | |
52b8dad8 BM |
375 | /* never request cert in Kerberos ciphersuites */ |
376 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
36d16f8e BL |
377 | { |
378 | /* no cert request */ | |
379 | skip=1; | |
380 | s->s3->tmp.cert_request=0; | |
381 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
382 | } | |
383 | else | |
384 | { | |
385 | s->s3->tmp.cert_request=1; | |
386 | ret=dtls1_send_certificate_request(s); | |
387 | if (ret <= 0) goto end; | |
388 | #ifndef NETSCAPE_HANG_BUG | |
389 | s->state=SSL3_ST_SW_SRVR_DONE_A; | |
390 | #else | |
391 | s->state=SSL3_ST_SW_FLUSH; | |
392 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
393 | #endif | |
394 | s->init_num=0; | |
395 | } | |
396 | break; | |
397 | ||
398 | case SSL3_ST_SW_SRVR_DONE_A: | |
399 | case SSL3_ST_SW_SRVR_DONE_B: | |
400 | ret=dtls1_send_server_done(s); | |
401 | if (ret <= 0) goto end; | |
402 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
403 | s->state=SSL3_ST_SW_FLUSH; | |
404 | s->init_num=0; | |
405 | break; | |
406 | ||
407 | case SSL3_ST_SW_FLUSH: | |
408 | /* number of bytes to be flushed */ | |
409 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
410 | if (num1 > 0) | |
411 | { | |
412 | s->rwstate=SSL_WRITING; | |
413 | num1=BIO_flush(s->wbio); | |
414 | if (num1 <= 0) { ret= -1; goto end; } | |
415 | s->rwstate=SSL_NOTHING; | |
416 | } | |
417 | ||
418 | s->state=s->s3->tmp.next_state; | |
419 | break; | |
420 | ||
421 | case SSL3_ST_SR_CERT_A: | |
422 | case SSL3_ST_SR_CERT_B: | |
423 | /* Check for second client hello (MS SGC) */ | |
424 | ret = ssl3_check_client_hello(s); | |
425 | if (ret <= 0) | |
426 | goto end; | |
427 | if (ret == 2) | |
428 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
429 | else { | |
430 | /* could be sent for a DH cert, even if we | |
431 | * have not asked for it :-) */ | |
432 | ret=ssl3_get_client_certificate(s); | |
433 | if (ret <= 0) goto end; | |
434 | s->init_num=0; | |
435 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
436 | } | |
437 | break; | |
438 | ||
439 | case SSL3_ST_SR_KEY_EXCH_A: | |
440 | case SSL3_ST_SR_KEY_EXCH_B: | |
441 | ret=ssl3_get_client_key_exchange(s); | |
442 | if (ret <= 0) goto end; | |
443 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
444 | s->init_num=0; | |
445 | ||
446 | /* We need to get hashes here so if there is | |
447 | * a client cert, it can be verified */ | |
448 | s->method->ssl3_enc->cert_verify_mac(s, | |
81025661 | 449 | NID_md5, |
36d16f8e BL |
450 | &(s->s3->tmp.cert_verify_md[0])); |
451 | s->method->ssl3_enc->cert_verify_mac(s, | |
81025661 | 452 | NID_sha1, |
36d16f8e BL |
453 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); |
454 | ||
455 | break; | |
456 | ||
457 | case SSL3_ST_SR_CERT_VRFY_A: | |
458 | case SSL3_ST_SR_CERT_VRFY_B: | |
459 | ||
460 | /* we should decide if we expected this one */ | |
461 | ret=ssl3_get_cert_verify(s); | |
462 | if (ret <= 0) goto end; | |
463 | ||
464 | s->state=SSL3_ST_SR_FINISHED_A; | |
465 | s->init_num=0; | |
466 | break; | |
467 | ||
468 | case SSL3_ST_SR_FINISHED_A: | |
469 | case SSL3_ST_SR_FINISHED_B: | |
470 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
471 | SSL3_ST_SR_FINISHED_B); | |
472 | if (ret <= 0) goto end; | |
473 | if (s->hit) | |
474 | s->state=SSL_ST_OK; | |
475 | else | |
476 | s->state=SSL3_ST_SW_CHANGE_A; | |
477 | s->init_num=0; | |
478 | break; | |
479 | ||
480 | case SSL3_ST_SW_CHANGE_A: | |
481 | case SSL3_ST_SW_CHANGE_B: | |
482 | ||
483 | s->session->cipher=s->s3->tmp.new_cipher; | |
484 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
485 | { ret= -1; goto end; } | |
486 | ||
487 | ret=dtls1_send_change_cipher_spec(s, | |
488 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
489 | ||
490 | if (ret <= 0) goto end; | |
491 | s->state=SSL3_ST_SW_FINISHED_A; | |
492 | s->init_num=0; | |
493 | ||
494 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
495 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) | |
496 | { | |
497 | ret= -1; | |
498 | goto end; | |
499 | } | |
500 | ||
501 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
502 | break; | |
503 | ||
504 | case SSL3_ST_SW_FINISHED_A: | |
505 | case SSL3_ST_SW_FINISHED_B: | |
506 | ret=dtls1_send_finished(s, | |
507 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
508 | s->method->ssl3_enc->server_finished_label, | |
509 | s->method->ssl3_enc->server_finished_label_len); | |
510 | if (ret <= 0) goto end; | |
511 | s->state=SSL3_ST_SW_FLUSH; | |
512 | if (s->hit) | |
513 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
514 | else | |
515 | s->s3->tmp.next_state=SSL_ST_OK; | |
516 | s->init_num=0; | |
517 | break; | |
518 | ||
519 | case SSL_ST_OK: | |
520 | /* clean a few things up */ | |
521 | ssl3_cleanup_key_block(s); | |
522 | ||
523 | #if 0 | |
524 | BUF_MEM_free(s->init_buf); | |
525 | s->init_buf=NULL; | |
526 | #endif | |
527 | ||
528 | /* remove buffering on output */ | |
529 | ssl_free_wbio_buffer(s); | |
530 | ||
531 | s->init_num=0; | |
532 | ||
533 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ | |
534 | { | |
535 | /* actually not necessarily a 'new' session unless | |
536 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
537 | ||
538 | s->new_session=0; | |
539 | ||
540 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
541 | ||
542 | s->ctx->stats.sess_accept_good++; | |
543 | /* s->server=1; */ | |
544 | s->handshake_func=dtls1_accept; | |
545 | ||
546 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
547 | } | |
548 | ||
549 | ret = 1; | |
550 | ||
551 | /* done handshaking, next message is client hello */ | |
552 | s->d1->handshake_read_seq = 0; | |
553 | /* next message is server hello */ | |
554 | s->d1->handshake_write_seq = 0; | |
555 | goto end; | |
556 | /* break; */ | |
557 | ||
558 | default: | |
beb056b3 | 559 | SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); |
36d16f8e BL |
560 | ret= -1; |
561 | goto end; | |
562 | /* break; */ | |
563 | } | |
564 | ||
565 | if (!s->s3->tmp.reuse_message && !skip) | |
566 | { | |
567 | if (s->debug) | |
568 | { | |
569 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
570 | goto end; | |
571 | } | |
572 | ||
573 | ||
574 | if ((cb != NULL) && (s->state != state)) | |
575 | { | |
576 | new_state=s->state; | |
577 | s->state=state; | |
578 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
579 | s->state=new_state; | |
580 | } | |
581 | } | |
582 | skip=0; | |
583 | } | |
584 | end: | |
585 | /* BIO_flush(s->wbio); */ | |
586 | ||
587 | s->in_handshake--; | |
588 | if (cb != NULL) | |
589 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
590 | return(ret); | |
591 | } | |
592 | ||
593 | int dtls1_send_hello_request(SSL *s) | |
594 | { | |
595 | unsigned char *p; | |
596 | ||
597 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
598 | { | |
599 | p=(unsigned char *)s->init_buf->data; | |
600 | p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0); | |
601 | ||
602 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
603 | /* number of bytes to write */ | |
604 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
605 | s->init_off=0; | |
606 | ||
607 | /* no need to buffer this message, since there are no retransmit | |
608 | * requests for it */ | |
609 | } | |
610 | ||
611 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
612 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
613 | } | |
614 | ||
615 | int dtls1_send_hello_verify_request(SSL *s) | |
616 | { | |
617 | unsigned int msg_len; | |
618 | unsigned char *msg, *buf, *p; | |
619 | ||
620 | if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) | |
621 | { | |
622 | buf = (unsigned char *)s->init_buf->data; | |
623 | ||
624 | msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); | |
625 | *(p++) = s->version >> 8; | |
626 | *(p++) = s->version & 0xFF; | |
627 | ||
628 | *(p++) = (unsigned char) s->d1->cookie_len; | |
52b8dad8 BM |
629 | if (s->ctx->app_gen_cookie_cb != NULL && |
630 | s->ctx->app_gen_cookie_cb(s, s->d1->cookie, | |
631 | &(s->d1->cookie_len)) == 0) | |
632 | { | |
633 | SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); | |
634 | return 0; | |
635 | } | |
636 | /* else the cookie is assumed to have | |
637 | * been initialized by the application */ | |
36d16f8e BL |
638 | |
639 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
640 | p += s->d1->cookie_len; | |
641 | msg_len = p - msg; | |
642 | ||
643 | dtls1_set_message_header(s, buf, | |
644 | DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len); | |
645 | ||
646 | s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; | |
647 | /* number of bytes to write */ | |
648 | s->init_num=p-buf; | |
649 | s->init_off=0; | |
650 | ||
651 | /* buffer the message to handle re-xmits */ | |
652 | dtls1_buffer_message(s, 0); | |
653 | } | |
654 | ||
655 | /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ | |
656 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
657 | } | |
658 | ||
659 | int dtls1_send_server_hello(SSL *s) | |
660 | { | |
661 | unsigned char *buf; | |
662 | unsigned char *p,*d; | |
20a90e3a GT |
663 | int i; |
664 | unsigned int sl; | |
36d16f8e BL |
665 | unsigned long l,Time; |
666 | ||
667 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
668 | { | |
669 | buf=(unsigned char *)s->init_buf->data; | |
670 | p=s->s3->server_random; | |
7bbcb2f6 | 671 | Time=(unsigned long)time(NULL); /* Time */ |
36d16f8e BL |
672 | l2n(Time,p); |
673 | RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); | |
674 | /* Do the message type and length last */ | |
675 | d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); | |
676 | ||
677 | *(p++)=s->version>>8; | |
678 | *(p++)=s->version&0xff; | |
679 | ||
680 | /* Random stuff */ | |
681 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
682 | p+=SSL3_RANDOM_SIZE; | |
683 | ||
684 | /* now in theory we have 3 options to sending back the | |
685 | * session id. If it is a re-use, we send back the | |
686 | * old session-id, if it is a new session, we send | |
687 | * back the new session-id or we send back a 0 length | |
688 | * session-id if we want it to be single use. | |
689 | * Currently I will not implement the '0' length session-id | |
690 | * 12-Jan-98 - I'll now support the '0' length stuff. | |
691 | */ | |
692 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) | |
693 | s->session->session_id_length=0; | |
694 | ||
695 | sl=s->session->session_id_length; | |
696 | if (sl > sizeof s->session->session_id) | |
697 | { | |
beb056b3 | 698 | SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
699 | return -1; |
700 | } | |
701 | *(p++)=sl; | |
702 | memcpy(p,s->session->session_id,sl); | |
703 | p+=sl; | |
704 | ||
705 | /* put the cipher */ | |
706 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
707 | p+=i; | |
708 | ||
709 | /* put the compression method */ | |
09b6c2ef DSH |
710 | #ifdef OPENSSL_NO_COMP |
711 | *(p++)=0; | |
712 | #else | |
36d16f8e BL |
713 | if (s->s3->tmp.new_compression == NULL) |
714 | *(p++)=0; | |
715 | else | |
716 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 717 | #endif |
36d16f8e BL |
718 | |
719 | /* do the header */ | |
720 | l=(p-d); | |
721 | d=buf; | |
722 | ||
723 | d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l); | |
724 | ||
725 | s->state=SSL3_ST_CW_CLNT_HELLO_B; | |
726 | /* number of bytes to write */ | |
727 | s->init_num=p-buf; | |
728 | s->init_off=0; | |
729 | ||
730 | /* buffer the message to handle re-xmits */ | |
731 | dtls1_buffer_message(s, 0); | |
732 | } | |
733 | ||
734 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
735 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
736 | } | |
737 | ||
738 | int dtls1_send_server_done(SSL *s) | |
739 | { | |
740 | unsigned char *p; | |
741 | ||
742 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
743 | { | |
744 | p=(unsigned char *)s->init_buf->data; | |
745 | ||
746 | /* do the header */ | |
747 | p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0); | |
748 | ||
749 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
750 | /* number of bytes to write */ | |
751 | s->init_num=DTLS1_HM_HEADER_LENGTH; | |
752 | s->init_off=0; | |
753 | ||
754 | /* buffer the message to handle re-xmits */ | |
755 | dtls1_buffer_message(s, 0); | |
756 | } | |
757 | ||
758 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
759 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
760 | } | |
761 | ||
762 | int dtls1_send_server_key_exchange(SSL *s) | |
763 | { | |
764 | #ifndef OPENSSL_NO_RSA | |
765 | unsigned char *q; | |
766 | int j,num; | |
767 | RSA *rsa; | |
768 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
769 | unsigned int u; | |
770 | #endif | |
771 | #ifndef OPENSSL_NO_DH | |
772 | DH *dh=NULL,*dhp; | |
773 | #endif | |
774 | EVP_PKEY *pkey; | |
775 | unsigned char *p,*d; | |
776 | int al,i; | |
777 | unsigned long type; | |
778 | int n; | |
779 | CERT *cert; | |
780 | BIGNUM *r[4]; | |
781 | int nr[4],kn; | |
782 | BUF_MEM *buf; | |
783 | EVP_MD_CTX md_ctx; | |
784 | ||
785 | EVP_MD_CTX_init(&md_ctx); | |
786 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) | |
787 | { | |
52b8dad8 | 788 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
36d16f8e BL |
789 | cert=s->cert; |
790 | ||
791 | buf=s->init_buf; | |
792 | ||
793 | r[0]=r[1]=r[2]=r[3]=NULL; | |
794 | n=0; | |
795 | #ifndef OPENSSL_NO_RSA | |
796 | if (type & SSL_kRSA) | |
797 | { | |
798 | rsa=cert->rsa_tmp; | |
799 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) | |
800 | { | |
801 | rsa=s->cert->rsa_tmp_cb(s, | |
802 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
803 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
804 | if(rsa == NULL) | |
805 | { | |
806 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 807 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); |
36d16f8e BL |
808 | goto f_err; |
809 | } | |
810 | RSA_up_ref(rsa); | |
811 | cert->rsa_tmp=rsa; | |
812 | } | |
813 | if (rsa == NULL) | |
814 | { | |
815 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 816 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
36d16f8e BL |
817 | goto f_err; |
818 | } | |
819 | r[0]=rsa->n; | |
820 | r[1]=rsa->e; | |
821 | s->s3->tmp.use_rsa_tmp=1; | |
822 | } | |
823 | else | |
824 | #endif | |
825 | #ifndef OPENSSL_NO_DH | |
826 | if (type & SSL_kEDH) | |
827 | { | |
828 | dhp=cert->dh_tmp; | |
829 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) | |
830 | dhp=s->cert->dh_tmp_cb(s, | |
831 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
832 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
833 | if (dhp == NULL) | |
834 | { | |
835 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 836 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
36d16f8e BL |
837 | goto f_err; |
838 | } | |
839 | ||
840 | if (s->s3->tmp.dh != NULL) | |
841 | { | |
842 | DH_free(dh); | |
beb056b3 | 843 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
36d16f8e BL |
844 | goto err; |
845 | } | |
846 | ||
847 | if ((dh=DHparams_dup(dhp)) == NULL) | |
848 | { | |
beb056b3 | 849 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
850 | goto err; |
851 | } | |
852 | ||
853 | s->s3->tmp.dh=dh; | |
854 | if ((dhp->pub_key == NULL || | |
855 | dhp->priv_key == NULL || | |
856 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
857 | { | |
858 | if(!DH_generate_key(dh)) | |
859 | { | |
beb056b3 | 860 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, |
36d16f8e BL |
861 | ERR_R_DH_LIB); |
862 | goto err; | |
863 | } | |
864 | } | |
865 | else | |
866 | { | |
867 | dh->pub_key=BN_dup(dhp->pub_key); | |
868 | dh->priv_key=BN_dup(dhp->priv_key); | |
869 | if ((dh->pub_key == NULL) || | |
870 | (dh->priv_key == NULL)) | |
871 | { | |
beb056b3 | 872 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
36d16f8e BL |
873 | goto err; |
874 | } | |
875 | } | |
876 | r[0]=dh->p; | |
877 | r[1]=dh->g; | |
878 | r[2]=dh->pub_key; | |
879 | } | |
880 | else | |
881 | #endif | |
882 | { | |
883 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 884 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
36d16f8e BL |
885 | goto f_err; |
886 | } | |
887 | for (i=0; r[i] != NULL; i++) | |
888 | { | |
889 | nr[i]=BN_num_bytes(r[i]); | |
890 | n+=2+nr[i]; | |
891 | } | |
892 | ||
52b8dad8 | 893 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
36d16f8e BL |
894 | { |
895 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
896 | == NULL) | |
897 | { | |
898 | al=SSL_AD_DECODE_ERROR; | |
899 | goto f_err; | |
900 | } | |
901 | kn=EVP_PKEY_size(pkey); | |
902 | } | |
903 | else | |
904 | { | |
905 | pkey=NULL; | |
906 | kn=0; | |
907 | } | |
908 | ||
909 | if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn)) | |
910 | { | |
beb056b3 | 911 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); |
36d16f8e BL |
912 | goto err; |
913 | } | |
914 | d=(unsigned char *)s->init_buf->data; | |
915 | p= &(d[DTLS1_HM_HEADER_LENGTH]); | |
916 | ||
917 | for (i=0; r[i] != NULL; i++) | |
918 | { | |
919 | s2n(nr[i],p); | |
920 | BN_bn2bin(r[i],p); | |
921 | p+=nr[i]; | |
922 | } | |
923 | ||
924 | /* not anonymous */ | |
925 | if (pkey != NULL) | |
926 | { | |
927 | /* n is the length of the params, they start at | |
928 | * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space | |
929 | * at the end. */ | |
930 | #ifndef OPENSSL_NO_RSA | |
931 | if (pkey->type == EVP_PKEY_RSA) | |
932 | { | |
933 | q=md_buf; | |
934 | j=0; | |
935 | for (num=2; num > 0; num--) | |
936 | { | |
937 | EVP_DigestInit_ex(&md_ctx,(num == 2) | |
938 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
939 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
940 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
941 | EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
942 | EVP_DigestFinal_ex(&md_ctx,q, | |
943 | (unsigned int *)&i); | |
944 | q+=i; | |
945 | j+=i; | |
946 | } | |
947 | if (RSA_sign(NID_md5_sha1, md_buf, j, | |
948 | &(p[2]), &u, pkey->pkey.rsa) <= 0) | |
949 | { | |
beb056b3 | 950 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); |
36d16f8e BL |
951 | goto err; |
952 | } | |
953 | s2n(u,p); | |
954 | n+=u+2; | |
955 | } | |
956 | else | |
957 | #endif | |
958 | #if !defined(OPENSSL_NO_DSA) | |
959 | if (pkey->type == EVP_PKEY_DSA) | |
960 | { | |
961 | /* lets do DSS */ | |
962 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); | |
963 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
964 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
965 | EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); | |
966 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
967 | (unsigned int *)&i,pkey)) | |
968 | { | |
beb056b3 | 969 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); |
36d16f8e BL |
970 | goto err; |
971 | } | |
972 | s2n(i,p); | |
973 | n+=i+2; | |
974 | } | |
975 | else | |
976 | #endif | |
977 | { | |
978 | /* Is this error check actually needed? */ | |
979 | al=SSL_AD_HANDSHAKE_FAILURE; | |
beb056b3 | 980 | SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
36d16f8e BL |
981 | goto f_err; |
982 | } | |
983 | } | |
984 | ||
985 | d = dtls1_set_message_header(s, d, | |
986 | SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n); | |
987 | ||
988 | /* we should now have things packed up, so lets send | |
989 | * it off */ | |
990 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
991 | s->init_off=0; | |
992 | ||
993 | /* buffer the message to handle re-xmits */ | |
994 | dtls1_buffer_message(s, 0); | |
995 | } | |
996 | ||
997 | s->state = SSL3_ST_SW_KEY_EXCH_B; | |
998 | EVP_MD_CTX_cleanup(&md_ctx); | |
999 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1000 | f_err: | |
1001 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1002 | err: | |
1003 | EVP_MD_CTX_cleanup(&md_ctx); | |
1004 | return(-1); | |
1005 | } | |
1006 | ||
1007 | int dtls1_send_certificate_request(SSL *s) | |
1008 | { | |
1009 | unsigned char *p,*d; | |
1010 | int i,j,nl,off,n; | |
1011 | STACK_OF(X509_NAME) *sk=NULL; | |
1012 | X509_NAME *name; | |
1013 | BUF_MEM *buf; | |
1014 | ||
1015 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1016 | { | |
1017 | buf=s->init_buf; | |
1018 | ||
1019 | d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]); | |
1020 | ||
1021 | /* get the list of acceptable cert types */ | |
1022 | p++; | |
1023 | n=ssl3_get_req_cert_type(s,p); | |
1024 | d[0]=n; | |
1025 | p+=n; | |
1026 | n++; | |
1027 | ||
1028 | off=n; | |
1029 | p+=2; | |
1030 | n+=2; | |
1031 | ||
1032 | sk=SSL_get_client_CA_list(s); | |
1033 | nl=0; | |
1034 | if (sk != NULL) | |
1035 | { | |
1036 | for (i=0; i<sk_X509_NAME_num(sk); i++) | |
1037 | { | |
1038 | name=sk_X509_NAME_value(sk,i); | |
1039 | j=i2d_X509_NAME(name,NULL); | |
1040 | if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2)) | |
1041 | { | |
beb056b3 | 1042 | SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); |
36d16f8e BL |
1043 | goto err; |
1044 | } | |
1045 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]); | |
1046 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) | |
1047 | { | |
1048 | s2n(j,p); | |
1049 | i2d_X509_NAME(name,&p); | |
1050 | n+=2+j; | |
1051 | nl+=2+j; | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | d=p; | |
1056 | i2d_X509_NAME(name,&p); | |
1057 | j-=2; s2n(j,d); j+=2; | |
1058 | n+=j; | |
1059 | nl+=j; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | /* else no CA names */ | |
1064 | p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]); | |
1065 | s2n(nl,p); | |
1066 | ||
1067 | d=(unsigned char *)buf->data; | |
1068 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1069 | l2n3(n,d); | |
02c5ddf9 | 1070 | s2n(s->d1->handshake_write_seq,d); |
36d16f8e BL |
1071 | s->d1->handshake_write_seq++; |
1072 | ||
1073 | /* we should now have things packed up, so lets send | |
1074 | * it off */ | |
1075 | ||
1076 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; | |
1077 | s->init_off=0; | |
1078 | #ifdef NETSCAPE_HANG_BUG | |
1079 | /* XXX: what to do about this? */ | |
1080 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1081 | ||
1082 | /* do the header */ | |
1083 | *(p++)=SSL3_MT_SERVER_DONE; | |
1084 | *(p++)=0; | |
1085 | *(p++)=0; | |
1086 | *(p++)=0; | |
1087 | s->init_num += 4; | |
1088 | #endif | |
1089 | ||
1090 | /* XDTLS: set message header ? */ | |
1091 | /* buffer the message to handle re-xmits */ | |
1092 | dtls1_buffer_message(s, 0); | |
1093 | ||
1094 | s->state = SSL3_ST_SW_CERT_REQ_B; | |
1095 | } | |
1096 | ||
1097 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1098 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1099 | err: | |
1100 | return(-1); | |
1101 | } | |
1102 | ||
1103 | int dtls1_send_server_certificate(SSL *s) | |
1104 | { | |
1105 | unsigned long l; | |
1106 | X509 *x; | |
1107 | ||
1108 | if (s->state == SSL3_ST_SW_CERT_A) | |
1109 | { | |
1110 | x=ssl_get_server_send_cert(s); | |
52b8dad8 | 1111 | if (x == NULL) |
36d16f8e | 1112 | { |
52b8dad8 BM |
1113 | /* VRS: allow null cert if auth == KRB5 */ |
1114 | if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) || | |
1115 | (s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5)) | |
1116 | { | |
1117 | SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
1118 | return(0); | |
1119 | } | |
36d16f8e BL |
1120 | } |
1121 | ||
1122 | l=dtls1_output_cert_chain(s,x); | |
1123 | s->state=SSL3_ST_SW_CERT_B; | |
1124 | s->init_num=(int)l; | |
1125 | s->init_off=0; | |
1126 | ||
1127 | /* buffer the message to handle re-xmits */ | |
1128 | dtls1_buffer_message(s, 0); | |
1129 | } | |
1130 | ||
1131 | /* SSL3_ST_SW_CERT_B */ | |
1132 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); | |
1133 | } |