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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
8c74b5e5 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 8 | */ |
846e33c7 | 9 | |
ea262260 BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
12 | * | |
0f113f3e | 13 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
15 | * | |
16 | * The Contribution is licensed pursuant to the OpenSSL open source | |
17 | * license provided above. | |
18 | * | |
ea262260 BM |
19 | * ECC cipher suite support in OpenSSL originally written by |
20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
21 | * | |
22 | */ | |
ddac1974 NL |
23 | /* ==================================================================== |
24 | * Copyright 2005 Nokia. All rights reserved. | |
25 | * | |
26 | * The portions of the attached software ("Contribution") is developed by | |
27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
28 | * license. | |
29 | * | |
30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
32 | * support (see RFC 4279) to OpenSSL. | |
33 | * | |
34 | * No patent licenses or other rights except those expressly stated in | |
35 | * the OpenSSL open source license shall be deemed granted or received | |
36 | * expressly, by implication, estoppel, or otherwise. | |
37 | * | |
38 | * No assurances are provided by Nokia that the Contribution does not | |
39 | * infringe the patent or other intellectual property rights of any third | |
40 | * party or that the license provides you with all the necessary rights | |
41 | * to make use of the Contribution. | |
42 | * | |
43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
47 | * OTHERWISE. | |
48 | */ | |
d02b48c6 RE |
49 | |
50 | #include <stdio.h> | |
8ba708e5 | 51 | #include "../ssl_locl.h" |
61ae935a | 52 | #include "statem_locl.h" |
ec577822 BM |
53 | #include <openssl/buffer.h> |
54 | #include <openssl/rand.h> | |
55 | #include <openssl/objects.h> | |
56 | #include <openssl/evp.h> | |
dbad1690 | 57 | #include <openssl/md5.h> |
3c27208f | 58 | #include <openssl/dh.h> |
d095b68d | 59 | #include <openssl/bn.h> |
3c27208f | 60 | #include <openssl/engine.h> |
f9b3bff6 | 61 | |
7ab09630 | 62 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 63 | static int key_exchange_expected(SSL *s); |
0f113f3e | 64 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 65 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 66 | WPACKET *pkt); |
ea262260 | 67 | |
61ae935a MC |
68 | /* |
69 | * Is a CertificateRequest message allowed at the moment or not? | |
70 | * | |
71 | * Return values are: | |
72 | * 1: Yes | |
73 | * 0: No | |
74 | */ | |
7ab09630 | 75 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
76 | { |
77 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 78 | if ((s->version > SSL3_VERSION |
a230b26e EK |
79 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
80 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
81 | return 0; |
82 | ||
83 | return 1; | |
84 | } | |
85 | ||
86 | /* | |
a455d0f6 | 87 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
88 | * |
89 | * Return values are: | |
90 | * 1: Yes | |
91 | * 0: No | |
92 | */ | |
a455d0f6 | 93 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
94 | { |
95 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
96 | ||
97 | /* | |
98 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 99 | * ciphersuite or for SRP |
61ae935a | 100 | */ |
a455d0f6 MC |
101 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
102 | | SSL_kSRP)) { | |
103 | return 1; | |
61ae935a MC |
104 | } |
105 | ||
a455d0f6 | 106 | return 0; |
61ae935a MC |
107 | } |
108 | ||
0f1e51ea MC |
109 | /* |
110 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
111 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
112 | * server. The message type that the server has sent is provided in |mt|. The | |
113 | * current state is in |s->statem.hand_state|. | |
114 | * | |
115 | * Return values are: | |
116 | * 1: Success (transition allowed) | |
117 | * 0: Error (transition not allowed) | |
118 | */ | |
119 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
120 | { | |
121 | OSSL_STATEM *st = &s->statem; | |
122 | ||
123 | /* | |
124 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
125 | * yet negotiated TLSv1.3 at that point so that is handled by | |
126 | * ossl_statem_client_read_transition() | |
127 | */ | |
128 | ||
129 | switch (st->hand_state) { | |
130 | default: | |
131 | break; | |
132 | ||
133 | case TLS_ST_CR_SRVR_HELLO: | |
134 | if (s->hit) { | |
135 | if (s->tlsext_ticket_expected) { | |
136 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
137 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
138 | return 1; | |
139 | } | |
140 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
141 | st->hand_state = TLS_ST_CR_CHANGE; | |
142 | return 1; | |
143 | } | |
144 | } else { | |
145 | if (mt == SSL3_MT_CERTIFICATE) { | |
146 | st->hand_state = TLS_ST_CR_CERT; | |
147 | return 1; | |
148 | } | |
149 | } | |
150 | break; | |
151 | ||
152 | case TLS_ST_CR_CERT: | |
153 | /* | |
154 | * The CertificateStatus message is optional even if | |
155 | * |tlsext_status_expected| is set | |
156 | */ | |
157 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
158 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
159 | return 1; | |
160 | } | |
161 | /* Fall through */ | |
162 | ||
163 | case TLS_ST_CR_CERT_STATUS: | |
164 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
165 | if (cert_req_allowed(s)) { | |
166 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
167 | return 1; | |
168 | } | |
169 | goto err; | |
170 | } | |
171 | /* Fall through */ | |
172 | ||
173 | case TLS_ST_CR_CERT_REQ: | |
174 | if (mt == SSL3_MT_SERVER_DONE) { | |
175 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
176 | return 1; | |
177 | } | |
178 | break; | |
179 | ||
180 | case TLS_ST_CW_FINISHED: | |
181 | if (s->tlsext_ticket_expected) { | |
182 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
183 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
184 | return 1; | |
185 | } | |
186 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
187 | st->hand_state = TLS_ST_CR_CHANGE; | |
188 | return 1; | |
189 | } | |
190 | break; | |
191 | ||
192 | case TLS_ST_CR_SESSION_TICKET: | |
193 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
194 | st->hand_state = TLS_ST_CR_CHANGE; | |
195 | return 1; | |
196 | } | |
197 | break; | |
198 | ||
199 | case TLS_ST_CR_CHANGE: | |
200 | if (mt == SSL3_MT_FINISHED) { | |
201 | st->hand_state = TLS_ST_CR_FINISHED; | |
202 | return 1; | |
203 | } | |
204 | break; | |
205 | } | |
206 | ||
207 | err: | |
208 | /* No valid transition found */ | |
209 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); | |
210 | SSLerr(SSL_F_OSSL_STATEM_CLIENT13_READ_TRANSITION, | |
211 | SSL_R_UNEXPECTED_MESSAGE); | |
212 | return 0; | |
213 | } | |
214 | ||
61ae935a | 215 | /* |
8481f583 MC |
216 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
217 | * handshake state transitions when the client is reading messages from the | |
218 | * server. The message type that the server has sent is provided in |mt|. The | |
219 | * current state is in |s->statem.hand_state|. | |
61ae935a MC |
220 | * |
221 | * Return values are: | |
222 | * 1: Success (transition allowed) | |
223 | * 0: Error (transition not allowed) | |
224 | */ | |
8481f583 | 225 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 226 | { |
d6f1a6e9 | 227 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 228 | int ske_expected; |
61ae935a | 229 | |
0f1e51ea MC |
230 | /* |
231 | * Note that after a ClientHello we don't know what version we are going | |
232 | * to negotiate yet, so we don't take this branch until later | |
233 | */ | |
234 | if (s->method->version == TLS1_3_VERSION) | |
235 | return ossl_statem_client13_read_transition(s, mt); | |
236 | ||
a230b26e | 237 | switch (st->hand_state) { |
f3b3d7f0 RS |
238 | default: |
239 | break; | |
240 | ||
61ae935a MC |
241 | case TLS_ST_CW_CLNT_HELLO: |
242 | if (mt == SSL3_MT_SERVER_HELLO) { | |
243 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
244 | return 1; | |
245 | } | |
246 | ||
247 | if (SSL_IS_DTLS(s)) { | |
248 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
249 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
250 | return 1; | |
251 | } | |
252 | } | |
253 | break; | |
254 | ||
255 | case TLS_ST_CR_SRVR_HELLO: | |
256 | if (s->hit) { | |
257 | if (s->tlsext_ticket_expected) { | |
258 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
259 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
260 | return 1; | |
261 | } | |
262 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
263 | st->hand_state = TLS_ST_CR_CHANGE; | |
264 | return 1; | |
265 | } | |
266 | } else { | |
267 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
268 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
269 | return 1; | |
ad3819c2 | 270 | } else if (s->version >= TLS1_VERSION |
a230b26e EK |
271 | && s->tls_session_secret_cb != NULL |
272 | && s->session->tlsext_tick != NULL | |
273 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
ad3819c2 MC |
274 | /* |
275 | * Normally, we can tell if the server is resuming the session | |
276 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
277 | * the next server message after the ServerHello to determine if | |
278 | * the server is resuming. | |
279 | */ | |
280 | s->hit = 1; | |
281 | st->hand_state = TLS_ST_CR_CHANGE; | |
282 | return 1; | |
61ae935a | 283 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 284 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
285 | if (mt == SSL3_MT_CERTIFICATE) { |
286 | st->hand_state = TLS_ST_CR_CERT; | |
287 | return 1; | |
288 | } | |
289 | } else { | |
a455d0f6 | 290 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
291 | /* SKE is optional for some PSK ciphersuites */ |
292 | if (ske_expected | |
a230b26e EK |
293 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
294 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
295 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
296 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
297 | return 1; | |
298 | } | |
299 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
300 | && cert_req_allowed(s)) { |
301 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
302 | return 1; | |
a455d0f6 | 303 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
304 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
305 | return 1; | |
61ae935a MC |
306 | } |
307 | } | |
308 | } | |
309 | break; | |
310 | ||
311 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
312 | /* |
313 | * The CertificateStatus message is optional even if | |
314 | * |tlsext_status_expected| is set | |
315 | */ | |
316 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
317 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
318 | return 1; | |
a455d0f6 MC |
319 | } |
320 | /* Fall through */ | |
321 | ||
322 | case TLS_ST_CR_CERT_STATUS: | |
323 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 324 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
325 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
326 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
327 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
328 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
329 | return 1; | |
61ae935a | 330 | } |
672f3337 | 331 | goto err; |
61ae935a | 332 | } |
a455d0f6 | 333 | /* Fall through */ |
61ae935a | 334 | |
a455d0f6 MC |
335 | case TLS_ST_CR_KEY_EXCH: |
336 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
337 | if (cert_req_allowed(s)) { | |
61ae935a MC |
338 | st->hand_state = TLS_ST_CR_CERT_REQ; |
339 | return 1; | |
61ae935a | 340 | } |
672f3337 | 341 | goto err; |
61ae935a | 342 | } |
a455d0f6 | 343 | /* Fall through */ |
61ae935a MC |
344 | |
345 | case TLS_ST_CR_CERT_REQ: | |
346 | if (mt == SSL3_MT_SERVER_DONE) { | |
347 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
348 | return 1; | |
349 | } | |
350 | break; | |
351 | ||
352 | case TLS_ST_CW_FINISHED: | |
c45d6b2b DB |
353 | if (s->tlsext_ticket_expected) { |
354 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
355 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
356 | return 1; | |
357 | } | |
61ae935a MC |
358 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
359 | st->hand_state = TLS_ST_CR_CHANGE; | |
360 | return 1; | |
361 | } | |
362 | break; | |
363 | ||
364 | case TLS_ST_CR_SESSION_TICKET: | |
365 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
366 | st->hand_state = TLS_ST_CR_CHANGE; | |
367 | return 1; | |
368 | } | |
369 | break; | |
370 | ||
371 | case TLS_ST_CR_CHANGE: | |
372 | if (mt == SSL3_MT_FINISHED) { | |
373 | st->hand_state = TLS_ST_CR_FINISHED; | |
374 | return 1; | |
375 | } | |
376 | break; | |
61ae935a MC |
377 | } |
378 | ||
672f3337 | 379 | err: |
61ae935a | 380 | /* No valid transition found */ |
672f3337 | 381 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 382 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
383 | return 0; |
384 | } | |
385 | ||
386 | /* | |
0f1e51ea MC |
387 | * ossl_statem_client13_write_transition() works out what handshake state to |
388 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
389 | * server. | |
390 | * | |
391 | * Return values: | |
392 | * WRITE_TRAN_ERROR - an error occurred | |
393 | * WRITE_TRAN_CONTINUE - Successful transition, more writing to be done | |
394 | * WRITE_TRAN_FINISHED - Successful transition, no more writing to be done | |
395 | */ | |
396 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
397 | { | |
398 | OSSL_STATEM *st = &s->statem; | |
399 | ||
400 | /* | |
401 | * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO, | |
402 | * because we haven't negotiated TLSv1.3 yet at that point. They are | |
403 | * handled by ossl_statem_client_write_transition(). | |
404 | */ | |
405 | switch (st->hand_state) { | |
406 | default: | |
407 | /* Shouldn't happen */ | |
408 | return WRITE_TRAN_ERROR; | |
409 | ||
410 | case TLS_ST_CR_SRVR_DONE: | |
411 | if (s->s3->tmp.cert_req) | |
412 | st->hand_state = TLS_ST_CW_CERT; | |
413 | else | |
414 | st->hand_state = TLS_ST_CW_CHANGE; | |
415 | return WRITE_TRAN_CONTINUE; | |
416 | ||
417 | case TLS_ST_CW_CERT: | |
418 | /* If a non-empty Certificate we also send CertificateVerify */ | |
419 | if (s->s3->tmp.cert_req == 1) | |
420 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
421 | else | |
422 | st->hand_state = TLS_ST_CW_CHANGE; | |
423 | return WRITE_TRAN_CONTINUE; | |
424 | ||
425 | case TLS_ST_CW_CERT_VRFY: | |
426 | st->hand_state = TLS_ST_CW_CHANGE; | |
427 | return WRITE_TRAN_CONTINUE; | |
428 | ||
429 | case TLS_ST_CW_CHANGE: | |
430 | st->hand_state = TLS_ST_CW_FINISHED; | |
431 | return WRITE_TRAN_CONTINUE; | |
432 | ||
433 | case TLS_ST_CW_FINISHED: | |
434 | if (s->hit) { | |
435 | st->hand_state = TLS_ST_OK; | |
436 | ossl_statem_set_in_init(s, 0); | |
437 | return WRITE_TRAN_CONTINUE; | |
438 | } else { | |
439 | return WRITE_TRAN_FINISHED; | |
440 | } | |
441 | ||
442 | case TLS_ST_CR_FINISHED: | |
443 | if (s->hit) { | |
444 | st->hand_state = TLS_ST_CW_CHANGE; | |
445 | return WRITE_TRAN_CONTINUE; | |
446 | } else { | |
447 | st->hand_state = TLS_ST_OK; | |
448 | ossl_statem_set_in_init(s, 0); | |
449 | return WRITE_TRAN_CONTINUE; | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | /* | |
455 | * ossl_statem_client_write_transition() works out what handshake state to | |
456 | * move to next when the client is writing messages to be sent to the server. | |
457 | * | |
458 | * Return values: | |
459 | * WRITE_TRAN_ERROR - an error occurred | |
460 | * WRITE_TRAN_CONTINUE - Successful transition, more writing to be done | |
461 | * WRITE_TRAN_FINISHED - Successful transition, no more writing to be done | |
61ae935a | 462 | */ |
8481f583 | 463 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 464 | { |
d6f1a6e9 | 465 | OSSL_STATEM *st = &s->statem; |
61ae935a | 466 | |
0f1e51ea MC |
467 | /* |
468 | * Note that immediately before/after a ClientHello we don't know what | |
469 | * version we are going to negotiate yet, so we don't take this branch until | |
470 | * later | |
471 | */ | |
472 | if (s->method->version == TLS1_3_VERSION) | |
473 | return ossl_statem_client13_write_transition(s); | |
474 | ||
a230b26e | 475 | switch (st->hand_state) { |
f3b3d7f0 RS |
476 | default: |
477 | /* Shouldn't happen */ | |
478 | return WRITE_TRAN_ERROR; | |
479 | ||
a230b26e EK |
480 | case TLS_ST_OK: |
481 | /* Renegotiation - fall through */ | |
482 | case TLS_ST_BEFORE: | |
483 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
484 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 485 | |
a230b26e EK |
486 | case TLS_ST_CW_CLNT_HELLO: |
487 | /* | |
488 | * No transition at the end of writing because we don't know what | |
489 | * we will be sent | |
490 | */ | |
491 | return WRITE_TRAN_FINISHED; | |
61ae935a | 492 | |
a230b26e EK |
493 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
494 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
495 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 496 | |
a230b26e EK |
497 | case TLS_ST_CR_SRVR_DONE: |
498 | if (s->s3->tmp.cert_req) | |
499 | st->hand_state = TLS_ST_CW_CERT; | |
500 | else | |
61ae935a | 501 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 502 | return WRITE_TRAN_CONTINUE; |
61ae935a | 503 | |
a230b26e EK |
504 | case TLS_ST_CW_CERT: |
505 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
506 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 507 | |
a230b26e EK |
508 | case TLS_ST_CW_KEY_EXCH: |
509 | /* | |
510 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
511 | * sent, but no verify packet is sent | |
512 | */ | |
513 | /* | |
514 | * XXX: For now, we do not support client authentication in ECDH | |
515 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
516 | * need to skip the certificate verify message when client's | |
517 | * ECDH public key is sent inside the client certificate. | |
518 | */ | |
519 | if (s->s3->tmp.cert_req == 1) { | |
520 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
521 | } else { | |
61ae935a | 522 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
523 | } |
524 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
525 | st->hand_state = TLS_ST_CW_CHANGE; | |
526 | } | |
527 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 528 | |
a230b26e EK |
529 | case TLS_ST_CW_CERT_VRFY: |
530 | st->hand_state = TLS_ST_CW_CHANGE; | |
531 | return WRITE_TRAN_CONTINUE; | |
532 | ||
533 | case TLS_ST_CW_CHANGE: | |
61ae935a | 534 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 535 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 536 | #else |
a230b26e EK |
537 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) |
538 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
539 | else | |
540 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 541 | #endif |
a230b26e | 542 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
543 | |
544 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
545 | case TLS_ST_CW_NEXT_PROTO: |
546 | st->hand_state = TLS_ST_CW_FINISHED; | |
547 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
548 | #endif |
549 | ||
a230b26e EK |
550 | case TLS_ST_CW_FINISHED: |
551 | if (s->hit) { | |
552 | st->hand_state = TLS_ST_OK; | |
553 | ossl_statem_set_in_init(s, 0); | |
554 | return WRITE_TRAN_CONTINUE; | |
555 | } else { | |
556 | return WRITE_TRAN_FINISHED; | |
557 | } | |
61ae935a | 558 | |
a230b26e EK |
559 | case TLS_ST_CR_FINISHED: |
560 | if (s->hit) { | |
561 | st->hand_state = TLS_ST_CW_CHANGE; | |
562 | return WRITE_TRAN_CONTINUE; | |
563 | } else { | |
564 | st->hand_state = TLS_ST_OK; | |
565 | ossl_statem_set_in_init(s, 0); | |
566 | return WRITE_TRAN_CONTINUE; | |
567 | } | |
61ae935a MC |
568 | } |
569 | } | |
570 | ||
571 | /* | |
572 | * Perform any pre work that needs to be done prior to sending a message from | |
573 | * the client to the server. | |
574 | */ | |
8481f583 | 575 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 576 | { |
d6f1a6e9 | 577 | OSSL_STATEM *st = &s->statem; |
61ae935a | 578 | |
a230b26e | 579 | switch (st->hand_state) { |
f3b3d7f0 RS |
580 | default: |
581 | /* No pre work to be done */ | |
582 | break; | |
583 | ||
61ae935a MC |
584 | case TLS_ST_CW_CLNT_HELLO: |
585 | s->shutdown = 0; | |
586 | if (SSL_IS_DTLS(s)) { | |
587 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
588 | if (!ssl3_init_finished_mac(s)) { |
589 | ossl_statem_set_error(s); | |
590 | return WORK_ERROR; | |
591 | } | |
61ae935a MC |
592 | } |
593 | break; | |
594 | ||
61ae935a MC |
595 | case TLS_ST_CW_CHANGE: |
596 | if (SSL_IS_DTLS(s)) { | |
597 | if (s->hit) { | |
598 | /* | |
599 | * We're into the last flight so we don't retransmit these | |
600 | * messages unless we need to. | |
601 | */ | |
602 | st->use_timer = 0; | |
603 | } | |
604 | #ifndef OPENSSL_NO_SCTP | |
605 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
606 | return dtls_wait_for_dry(s); | |
607 | #endif | |
608 | } | |
f3b3d7f0 | 609 | break; |
61ae935a MC |
610 | |
611 | case TLS_ST_OK: | |
612 | return tls_finish_handshake(s, wst); | |
61ae935a MC |
613 | } |
614 | ||
615 | return WORK_FINISHED_CONTINUE; | |
616 | } | |
617 | ||
618 | /* | |
619 | * Perform any work that needs to be done after sending a message from the | |
620 | * client to the server. | |
621 | */ | |
8481f583 | 622 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 623 | { |
d6f1a6e9 | 624 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
625 | |
626 | s->init_num = 0; | |
627 | ||
a230b26e | 628 | switch (st->hand_state) { |
f3b3d7f0 RS |
629 | default: |
630 | /* No post work to be done */ | |
631 | break; | |
632 | ||
61ae935a | 633 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 634 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 635 | return WORK_MORE_A; |
46417569 | 636 | |
61ae935a MC |
637 | if (SSL_IS_DTLS(s)) { |
638 | /* Treat the next message as the first packet */ | |
639 | s->first_packet = 1; | |
640 | } | |
641 | break; | |
642 | ||
643 | case TLS_ST_CW_KEY_EXCH: | |
644 | if (tls_client_key_exchange_post_work(s) == 0) | |
645 | return WORK_ERROR; | |
646 | break; | |
647 | ||
648 | case TLS_ST_CW_CHANGE: | |
649 | s->session->cipher = s->s3->tmp.new_cipher; | |
650 | #ifdef OPENSSL_NO_COMP | |
651 | s->session->compress_meth = 0; | |
652 | #else | |
653 | if (s->s3->tmp.new_compression == NULL) | |
654 | s->session->compress_meth = 0; | |
655 | else | |
656 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
657 | #endif | |
658 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
659 | return WORK_ERROR; | |
660 | ||
661 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
662 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
663 | return WORK_ERROR; | |
664 | ||
665 | if (SSL_IS_DTLS(s)) { | |
666 | #ifndef OPENSSL_NO_SCTP | |
667 | if (s->hit) { | |
668 | /* | |
669 | * Change to new shared key of SCTP-Auth, will be ignored if | |
670 | * no SCTP used. | |
671 | */ | |
672 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
673 | 0, NULL); | |
674 | } | |
675 | #endif | |
676 | ||
677 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
678 | } | |
679 | break; | |
680 | ||
681 | case TLS_ST_CW_FINISHED: | |
682 | #ifndef OPENSSL_NO_SCTP | |
683 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
684 | /* | |
685 | * Change to new shared key of SCTP-Auth, will be ignored if | |
686 | * no SCTP used. | |
687 | */ | |
688 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
689 | 0, NULL); | |
690 | } | |
691 | #endif | |
692 | if (statem_flush(s) != 1) | |
693 | return WORK_MORE_B; | |
61ae935a | 694 | break; |
61ae935a MC |
695 | } |
696 | ||
697 | return WORK_FINISHED_CONTINUE; | |
698 | } | |
699 | ||
700 | /* | |
6392fb8e MC |
701 | * Get the message construction function and message type for sending from the |
702 | * client | |
61ae935a MC |
703 | * |
704 | * Valid return values are: | |
705 | * 1: Success | |
706 | * 0: Error | |
707 | */ | |
6392fb8e | 708 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 709 | confunc_f *confunc, int *mt) |
61ae935a | 710 | { |
d6f1a6e9 | 711 | OSSL_STATEM *st = &s->statem; |
61ae935a | 712 | |
4a01c59f MC |
713 | switch (st->hand_state) { |
714 | default: | |
715 | /* Shouldn't happen */ | |
716 | return 0; | |
717 | ||
718 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 719 | if (SSL_IS_DTLS(s)) |
6392fb8e | 720 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 721 | else |
6392fb8e MC |
722 | *confunc = tls_construct_change_cipher_spec; |
723 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
724 | break; |
725 | ||
726 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
727 | *confunc = tls_construct_client_hello; |
728 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
729 | break; |
730 | ||
731 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
732 | *confunc = tls_construct_client_certificate; |
733 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
734 | break; |
735 | ||
736 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
737 | *confunc = tls_construct_client_key_exchange; |
738 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
739 | break; |
740 | ||
741 | case TLS_ST_CW_CERT_VRFY: | |
6392fb8e MC |
742 | *confunc = tls_construct_client_verify; |
743 | *mt = SSL3_MT_CERTIFICATE_VERIFY; | |
4a01c59f | 744 | break; |
61ae935a MC |
745 | |
746 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 747 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
748 | *confunc = tls_construct_next_proto; |
749 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 750 | break; |
61ae935a | 751 | #endif |
4a01c59f | 752 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
753 | *confunc = tls_construct_finished; |
754 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
755 | break; |
756 | } | |
5923ad4b | 757 | |
5923ad4b | 758 | return 1; |
61ae935a MC |
759 | } |
760 | ||
761 | /* | |
762 | * Returns the maximum allowed length for the current message that we are | |
763 | * reading. Excludes the message header. | |
764 | */ | |
eda75751 | 765 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 766 | { |
d6f1a6e9 | 767 | OSSL_STATEM *st = &s->statem; |
61ae935a | 768 | |
a230b26e | 769 | switch (st->hand_state) { |
f3b3d7f0 RS |
770 | default: |
771 | /* Shouldn't happen */ | |
772 | return 0; | |
773 | ||
a230b26e EK |
774 | case TLS_ST_CR_SRVR_HELLO: |
775 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 776 | |
a230b26e EK |
777 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
778 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 779 | |
a230b26e EK |
780 | case TLS_ST_CR_CERT: |
781 | return s->max_cert_list; | |
61ae935a | 782 | |
a230b26e EK |
783 | case TLS_ST_CR_CERT_STATUS: |
784 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 785 | |
a230b26e EK |
786 | case TLS_ST_CR_KEY_EXCH: |
787 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 788 | |
a230b26e EK |
789 | case TLS_ST_CR_CERT_REQ: |
790 | /* | |
791 | * Set to s->max_cert_list for compatibility with previous releases. In | |
792 | * practice these messages can get quite long if servers are configured | |
793 | * to provide a long list of acceptable CAs | |
794 | */ | |
795 | return s->max_cert_list; | |
61ae935a | 796 | |
a230b26e EK |
797 | case TLS_ST_CR_SRVR_DONE: |
798 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 799 | |
a230b26e EK |
800 | case TLS_ST_CR_CHANGE: |
801 | if (s->version == DTLS1_BAD_VER) | |
802 | return 3; | |
803 | return CCS_MAX_LENGTH; | |
61ae935a | 804 | |
a230b26e EK |
805 | case TLS_ST_CR_SESSION_TICKET: |
806 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 807 | |
a230b26e EK |
808 | case TLS_ST_CR_FINISHED: |
809 | return FINISHED_MAX_LENGTH; | |
61ae935a | 810 | } |
61ae935a MC |
811 | } |
812 | ||
813 | /* | |
814 | * Process a message that the client has been received from the server. | |
815 | */ | |
8481f583 | 816 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 817 | { |
d6f1a6e9 | 818 | OSSL_STATEM *st = &s->statem; |
61ae935a | 819 | |
a230b26e | 820 | switch (st->hand_state) { |
f3b3d7f0 RS |
821 | default: |
822 | /* Shouldn't happen */ | |
823 | return MSG_PROCESS_ERROR; | |
824 | ||
a230b26e EK |
825 | case TLS_ST_CR_SRVR_HELLO: |
826 | return tls_process_server_hello(s, pkt); | |
61ae935a | 827 | |
a230b26e EK |
828 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
829 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 830 | |
a230b26e EK |
831 | case TLS_ST_CR_CERT: |
832 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 833 | |
a230b26e EK |
834 | case TLS_ST_CR_CERT_STATUS: |
835 | return tls_process_cert_status(s, pkt); | |
61ae935a | 836 | |
a230b26e EK |
837 | case TLS_ST_CR_KEY_EXCH: |
838 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 839 | |
a230b26e EK |
840 | case TLS_ST_CR_CERT_REQ: |
841 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 842 | |
a230b26e EK |
843 | case TLS_ST_CR_SRVR_DONE: |
844 | return tls_process_server_done(s, pkt); | |
61ae935a | 845 | |
a230b26e EK |
846 | case TLS_ST_CR_CHANGE: |
847 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 848 | |
a230b26e EK |
849 | case TLS_ST_CR_SESSION_TICKET: |
850 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 851 | |
a230b26e EK |
852 | case TLS_ST_CR_FINISHED: |
853 | return tls_process_finished(s, pkt); | |
61ae935a | 854 | } |
61ae935a MC |
855 | } |
856 | ||
857 | /* | |
858 | * Perform any further processing required following the receipt of a message | |
859 | * from the server | |
860 | */ | |
8481f583 | 861 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 862 | { |
d6f1a6e9 | 863 | OSSL_STATEM *st = &s->statem; |
61ae935a | 864 | |
a230b26e | 865 | switch (st->hand_state) { |
f3b3d7f0 RS |
866 | default: |
867 | /* Shouldn't happen */ | |
868 | return WORK_ERROR; | |
869 | ||
05c4f1d5 MC |
870 | case TLS_ST_CR_CERT_REQ: |
871 | return tls_prepare_client_certificate(s, wst); | |
872 | ||
61ae935a MC |
873 | #ifndef OPENSSL_NO_SCTP |
874 | case TLS_ST_CR_SRVR_DONE: | |
875 | /* We only get here if we are using SCTP and we are renegotiating */ | |
876 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
877 | s->s3->in_read_app_data = 2; | |
878 | s->rwstate = SSL_READING; | |
879 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
880 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 881 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
882 | return WORK_MORE_A; |
883 | } | |
fe3a3291 | 884 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
885 | return WORK_FINISHED_STOP; |
886 | #endif | |
61ae935a | 887 | } |
61ae935a MC |
888 | } |
889 | ||
7cea05dc | 890 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 891 | { |
2c7b4dbc | 892 | unsigned char *p; |
ec60ccc1 MC |
893 | size_t sess_id_len; |
894 | int i, protverr; | |
2c7b4dbc | 895 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 896 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
897 | SSL_COMP *comp; |
898 | #endif | |
b9908bf9 | 899 | SSL_SESSION *sess = s->session; |
f2342b7a | 900 | int client_version; |
0f113f3e | 901 | |
7cea05dc | 902 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
903 | /* Should not happen */ |
904 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 905 | return 0; |
2c7b4dbc | 906 | } |
0f113f3e | 907 | |
b9908bf9 | 908 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
909 | protverr = ssl_set_client_hello_version(s); |
910 | if (protverr != 0) { | |
911 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 912 | return 0; |
4fa52141 | 913 | } |
0f113f3e | 914 | |
a230b26e | 915 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 916 | /* |
b9908bf9 MC |
917 | * In the case of EAP-FAST, we can have a pre-shared |
918 | * "ticket" without a session ID. | |
0f113f3e | 919 | */ |
b9908bf9 MC |
920 | (!sess->session_id_length && !sess->tlsext_tick) || |
921 | (sess->not_resumable)) { | |
922 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 923 | return 0; |
b9908bf9 MC |
924 | } |
925 | /* else use the pre-loaded session */ | |
0f113f3e | 926 | |
b9908bf9 | 927 | p = s->s3->client_random; |
0f113f3e | 928 | |
b9908bf9 MC |
929 | /* |
930 | * for DTLS if client_random is initialized, reuse it, we are | |
931 | * required to use same upon reply to HelloVerify | |
932 | */ | |
933 | if (SSL_IS_DTLS(s)) { | |
934 | size_t idx; | |
935 | i = 1; | |
936 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
937 | if (p[idx]) { | |
938 | i = 0; | |
939 | break; | |
0f113f3e | 940 | } |
0f113f3e | 941 | } |
b9908bf9 MC |
942 | } else |
943 | i = 1; | |
0f113f3e | 944 | |
a230b26e | 945 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 946 | return 0; |
b9908bf9 | 947 | |
b9908bf9 MC |
948 | /*- |
949 | * version indicates the negotiated version: for example from | |
950 | * an SSLv2/v3 compatible client hello). The client_version | |
951 | * field is the maximum version we permit and it is also | |
952 | * used in RSA encrypted premaster secrets. Some servers can | |
953 | * choke if we initially report a higher version then | |
954 | * renegotiate to a lower one in the premaster secret. This | |
955 | * didn't happen with TLS 1.0 as most servers supported it | |
956 | * but it can with TLS 1.1 or later if the server only supports | |
957 | * 1.0. | |
958 | * | |
959 | * Possible scenario with previous logic: | |
960 | * 1. Client hello indicates TLS 1.2 | |
961 | * 2. Server hello says TLS 1.0 | |
962 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 963 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
964 | * 5. Server sends hello request to renegotiate. |
965 | * 6. Client hello indicates TLS v1.0 as we now | |
966 | * know that is maximum server supports. | |
967 | * 7. Server chokes on RSA encrypted premaster secret | |
968 | * containing version 1.0. | |
969 | * | |
970 | * For interoperability it should be OK to always use the | |
971 | * maximum version we support in client hello and then rely | |
972 | * on the checking of version to ensure the servers isn't | |
973 | * being inconsistent: for example initially negotiating with | |
974 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
975 | * client_version in client hello and not resetting it to | |
976 | * the negotiated version. | |
cd998837 MC |
977 | * |
978 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 979 | * supported_versions extension for the real supported versions. |
b9908bf9 | 980 | */ |
f2342b7a MC |
981 | client_version = SSL_IS_TLS13(s) ? TLS1_2_VERSION : s->client_version; |
982 | if (!WPACKET_put_bytes_u16(pkt, client_version) | |
7cea05dc | 983 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 984 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 985 | return 0; |
2c7b4dbc | 986 | } |
b9908bf9 MC |
987 | |
988 | /* Session ID */ | |
989 | if (s->new_session) | |
ec60ccc1 | 990 | sess_id_len = 0; |
b9908bf9 | 991 | else |
ec60ccc1 MC |
992 | sess_id_len = s->session->session_id_length; |
993 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 994 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
995 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
996 | sess_id_len)) | |
7cea05dc | 997 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 998 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 999 | return 0; |
b9908bf9 | 1000 | } |
0f113f3e | 1001 | |
b9908bf9 MC |
1002 | /* cookie stuff for DTLS */ |
1003 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1004 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1005 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1006 | s->d1->cookie_len)) { |
b9908bf9 | 1007 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1008 | return 0; |
0f113f3e | 1009 | } |
b9908bf9 MC |
1010 | } |
1011 | ||
1012 | /* Ciphers supported */ | |
7cea05dc | 1013 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1014 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1015 | return 0; |
2c7b4dbc MC |
1016 | } |
1017 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1018 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1019 | return 0; | |
1020 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1021 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1022 | return 0; |
b9908bf9 | 1023 | } |
0f113f3e | 1024 | |
b9908bf9 | 1025 | /* COMPRESSION */ |
7cea05dc | 1026 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1027 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1028 | return 0; |
2c7b4dbc MC |
1029 | } |
1030 | #ifndef OPENSSL_NO_COMP | |
1031 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1032 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1033 | for (i = 0; i < compnum; i++) { | |
1034 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1035 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1036 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1037 | return 0; |
2c7b4dbc MC |
1038 | } |
1039 | } | |
b9908bf9 | 1040 | } |
09b6c2ef | 1041 | #endif |
2c7b4dbc | 1042 | /* Add the NULL method */ |
7cea05dc | 1043 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1044 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1045 | return 0; |
2c7b4dbc | 1046 | } |
761772d7 | 1047 | |
b9908bf9 MC |
1048 | /* TLS extensions */ |
1049 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1050 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
7cea05dc | 1051 | return 0; |
b9908bf9 | 1052 | } |
7cea05dc | 1053 | if (!WPACKET_start_sub_packet_u16(pkt) |
2c7b4dbc MC |
1054 | /* |
1055 | * If extensions are of zero length then we don't even add the | |
1056 | * extensions length bytes | |
1057 | */ | |
7cea05dc MC |
1058 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH) |
1059 | || !ssl_add_clienthello_tlsext(s, pkt, &al) | |
1060 | || !WPACKET_close(pkt)) { | |
b9908bf9 MC |
1061 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1062 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1063 | return 0; |
b9908bf9 | 1064 | } |
0f113f3e | 1065 | |
b9908bf9 | 1066 | return 1; |
0f113f3e | 1067 | } |
d02b48c6 | 1068 | |
be3583fa | 1069 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1070 | { |
1071 | int al; | |
cb150cbc | 1072 | size_t cookie_len; |
8ba708e5 MC |
1073 | PACKET cookiepkt; |
1074 | ||
1075 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1076 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1077 | al = SSL_AD_DECODE_ERROR; |
1078 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1079 | goto f_err; | |
1080 | } | |
1081 | ||
1082 | cookie_len = PACKET_remaining(&cookiepkt); | |
1083 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1084 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1085 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1086 | goto f_err; | |
1087 | } | |
1088 | ||
1089 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1090 | al = SSL_AD_DECODE_ERROR; | |
1091 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1092 | goto f_err; | |
1093 | } | |
1094 | s->d1->cookie_len = cookie_len; | |
1095 | ||
1096 | return MSG_PROCESS_FINISHED_READING; | |
1097 | f_err: | |
1098 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1099 | ossl_statem_set_error(s); |
8ba708e5 MC |
1100 | return MSG_PROCESS_ERROR; |
1101 | } | |
1102 | ||
be3583fa | 1103 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1104 | { |
1105 | STACK_OF(SSL_CIPHER) *sk; | |
1106 | const SSL_CIPHER *c; | |
73999b62 | 1107 | PACKET session_id; |
b9908bf9 | 1108 | size_t session_id_len; |
b6981744 | 1109 | const unsigned char *cipherchars; |
b9908bf9 MC |
1110 | int i, al = SSL_AD_INTERNAL_ERROR; |
1111 | unsigned int compression; | |
4fa52141 VD |
1112 | unsigned int sversion; |
1113 | int protverr; | |
b9908bf9 MC |
1114 | #ifndef OPENSSL_NO_COMP |
1115 | SSL_COMP *comp; | |
1116 | #endif | |
1117 | ||
4fa52141 VD |
1118 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1119 | al = SSL_AD_DECODE_ERROR; | |
1120 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1121 | goto f_err; | |
1122 | } | |
50932c4a | 1123 | |
4fa52141 VD |
1124 | protverr = ssl_choose_client_version(s, sversion); |
1125 | if (protverr != 0) { | |
1126 | al = SSL_AD_PROTOCOL_VERSION; | |
1127 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1128 | goto f_err; | |
0f113f3e | 1129 | } |
0f113f3e MC |
1130 | |
1131 | /* load the server hello data */ | |
1132 | /* load the server random */ | |
73999b62 | 1133 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1134 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1135 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1136 | goto f_err; |
1137 | } | |
0f113f3e MC |
1138 | |
1139 | s->hit = 0; | |
1140 | ||
fc5ce51d | 1141 | /* Get the session-id. */ |
73999b62 | 1142 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d | 1143 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1144 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1145 | goto f_err; |
1146 | } | |
1147 | session_id_len = PACKET_remaining(&session_id); | |
1148 | if (session_id_len > sizeof s->session->session_id | |
1149 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1150 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1151 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1152 | goto f_err; |
1153 | } | |
e481f9b9 | 1154 | |
73999b62 | 1155 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1156 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1157 | al = SSL_AD_DECODE_ERROR; |
1158 | goto f_err; | |
1159 | } | |
1160 | ||
0f113f3e | 1161 | /* |
6e3d0153 EK |
1162 | * Check if we can resume the session based on external pre-shared secret. |
1163 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1164 | * Resumption based on server-side state works with session IDs. | |
1165 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1166 | * works by overriding the SessionTicket extension at the application | |
1167 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1168 | * servers would honour the session ID.) Therefore, the session ID alone | |
1169 | * is not a reliable indicator of session resumption, so we first check if | |
1170 | * we can resume, and later peek at the next handshake message to see if the | |
1171 | * server wants to resume. | |
0f113f3e | 1172 | */ |
6e3d0153 EK |
1173 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1174 | s->session->tlsext_tick) { | |
4a640fb6 | 1175 | const SSL_CIPHER *pref_cipher = NULL; |
8c1a5343 MC |
1176 | /* |
1177 | * s->session->master_key_length is a size_t, but this is an int for | |
1178 | * backwards compat reasons | |
1179 | */ | |
1180 | int master_key_length; | |
1181 | master_key_length = sizeof(s->session->master_key); | |
0f113f3e | 1182 | if (s->tls_session_secret_cb(s, s->session->master_key, |
8c1a5343 | 1183 | &master_key_length, |
0f113f3e | 1184 | NULL, &pref_cipher, |
8c1a5343 MC |
1185 | s->tls_session_secret_cb_arg) |
1186 | && master_key_length > 0) { | |
1187 | s->session->master_key_length = master_key_length; | |
0f113f3e | 1188 | s->session->cipher = pref_cipher ? |
50932c4a | 1189 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1190 | } else { |
b9908bf9 | 1191 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1192 | al = SSL_AD_INTERNAL_ERROR; |
1193 | goto f_err; | |
0f113f3e | 1194 | } |
50932c4a MC |
1195 | } |
1196 | ||
fc5ce51d EK |
1197 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1198 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1199 | session_id_len) == 0) { | |
0f113f3e MC |
1200 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1201 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1202 | /* actually a client application bug */ | |
1203 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1204 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1205 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1206 | goto f_err; | |
1207 | } | |
1208 | s->hit = 1; | |
6e3d0153 | 1209 | } else { |
0f113f3e | 1210 | /* |
6e3d0153 EK |
1211 | * If we were trying for session-id reuse but the server |
1212 | * didn't echo the ID, make a new SSL_SESSION. | |
1213 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1214 | * so the PAC-based session secret is always preserved. It'll be | |
1215 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1216 | */ |
1217 | if (s->session->session_id_length > 0) { | |
4f6eaa59 | 1218 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1219 | if (!ssl_get_new_session(s, 0)) { |
1220 | goto f_err; | |
1221 | } | |
1222 | } | |
50932c4a | 1223 | |
ccae4a15 | 1224 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1225 | s->session->session_id_length = session_id_len; |
1226 | /* session_id_len could be 0 */ | |
1227 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1228 | session_id_len); | |
0f113f3e | 1229 | } |
fc5ce51d | 1230 | |
ccae4a15 FI |
1231 | /* Session version and negotiated protocol version should match */ |
1232 | if (s->version != s->session->ssl_version) { | |
1233 | al = SSL_AD_PROTOCOL_VERSION; | |
1234 | ||
1235 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1236 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1237 | goto f_err; | |
1238 | } | |
1239 | ||
50932c4a | 1240 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1241 | if (c == NULL) { |
1242 | /* unknown cipher */ | |
1243 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1244 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1245 | goto f_err; |
1246 | } | |
0f113f3e | 1247 | /* |
3eb2aff4 KR |
1248 | * Now that we know the version, update the check to see if it's an allowed |
1249 | * version. | |
1250 | */ | |
1251 | s->s3->tmp.min_ver = s->version; | |
1252 | s->s3->tmp.max_ver = s->version; | |
1253 | /* | |
1254 | * If it is a disabled cipher we either didn't send it in client hello, | |
1255 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1256 | */ |
1257 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1258 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1259 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1260 | goto f_err; |
1261 | } | |
0f113f3e MC |
1262 | |
1263 | sk = ssl_get_ciphers_by_id(s); | |
1264 | i = sk_SSL_CIPHER_find(sk, c); | |
1265 | if (i < 0) { | |
1266 | /* we did not say we would use this cipher */ | |
1267 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1268 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1269 | goto f_err; |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * Depending on the session caching (internal/external), the cipher | |
1274 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1275 | * set and use it for comparison. | |
1276 | */ | |
1277 | if (s->session->cipher) | |
1278 | s->session->cipher_id = s->session->cipher->id; | |
1279 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1280 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1281 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1282 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1283 | goto f_err; | |
0f113f3e MC |
1284 | } |
1285 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1286 | /* lets get the compression algorithm */ |
1287 | /* COMPRESSION */ | |
73999b62 | 1288 | if (!PACKET_get_1(pkt, &compression)) { |
f0659bdb | 1289 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1290 | al = SSL_AD_DECODE_ERROR; |
1291 | goto f_err; | |
1292 | } | |
09b6c2ef | 1293 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1294 | if (compression != 0) { |
0f113f3e | 1295 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1296 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1297 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1298 | goto f_err; | |
1299 | } | |
1300 | /* | |
1301 | * If compression is disabled we'd better not try to resume a session | |
1302 | * using compression. | |
1303 | */ | |
1304 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1305 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1306 | goto f_err; |
1307 | } | |
09b6c2ef | 1308 | #else |
fc5ce51d | 1309 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1310 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1311 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1312 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1313 | goto f_err; | |
1314 | } | |
fc5ce51d | 1315 | if (compression == 0) |
0f113f3e MC |
1316 | comp = NULL; |
1317 | else if (!ssl_allow_compression(s)) { | |
1318 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1319 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1320 | goto f_err; |
fc5ce51d EK |
1321 | } else { |
1322 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1323 | } | |
0f113f3e | 1324 | |
fc5ce51d | 1325 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1326 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1327 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1328 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1329 | goto f_err; | |
1330 | } else { | |
1331 | s->s3->tmp.new_compression = comp; | |
1332 | } | |
09b6c2ef | 1333 | #endif |
761772d7 | 1334 | |
0f113f3e | 1335 | /* TLS extensions */ |
73999b62 | 1336 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1337 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1338 | goto err; |
1339 | } | |
0f113f3e | 1340 | |
73999b62 | 1341 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1342 | /* wrong packet length */ |
1343 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1344 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1345 | goto f_err; |
1346 | } | |
8723588e MC |
1347 | #ifndef OPENSSL_NO_SCTP |
1348 | if (SSL_IS_DTLS(s) && s->hit) { | |
1349 | unsigned char sctpauthkey[64]; | |
1350 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1351 | ||
1352 | /* | |
1353 | * Add new shared key for SCTP-Auth, will be ignored if | |
1354 | * no SCTP used. | |
1355 | */ | |
141eb8c6 MC |
1356 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1357 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1358 | |
1359 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1360 | sizeof(sctpauthkey), |
1361 | labelbuffer, | |
1362 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
8723588e MC |
1363 | goto err; |
1364 | ||
1365 | BIO_ctrl(SSL_get_wbio(s), | |
1366 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1367 | sizeof(sctpauthkey), sctpauthkey); | |
1368 | } | |
1369 | #endif | |
1370 | ||
b9908bf9 | 1371 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1372 | f_err: |
1373 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1374 | err: | |
fe3a3291 | 1375 | ossl_statem_set_error(s); |
b9908bf9 | 1376 | return MSG_PROCESS_ERROR; |
0f113f3e | 1377 | } |
d02b48c6 | 1378 | |
be3583fa | 1379 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1380 | { |
1381 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1382 | unsigned long cert_list_len, cert_len; | |
1383 | X509 *x = NULL; | |
b6981744 | 1384 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1385 | STACK_OF(X509) *sk = NULL; |
1386 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1387 | |
1388 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1389 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1390 | goto err; |
0f113f3e MC |
1391 | } |
1392 | ||
73999b62 | 1393 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
a230b26e | 1394 | || PACKET_remaining(pkt) != cert_list_len) { |
0f113f3e | 1395 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1396 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1397 | goto f_err; |
1398 | } | |
73999b62 MC |
1399 | while (PACKET_remaining(pkt)) { |
1400 | if (!PACKET_get_net_3(pkt, &cert_len) | |
a230b26e | 1401 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1402 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1403 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1404 | SSL_R_CERT_LENGTH_MISMATCH); |
1405 | goto f_err; | |
1406 | } | |
1407 | ||
df758a85 MC |
1408 | certstart = certbytes; |
1409 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1410 | if (x == NULL) { |
1411 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1412 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1413 | goto f_err; |
1414 | } | |
df758a85 | 1415 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1416 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1417 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1418 | SSL_R_CERT_LENGTH_MISMATCH); |
1419 | goto f_err; | |
1420 | } | |
1421 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1422 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1423 | goto err; |
0f113f3e MC |
1424 | } |
1425 | x = NULL; | |
0f113f3e MC |
1426 | } |
1427 | ||
1428 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1429 | /* |
1430 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1431 | * for client side verification of the server certificate to take place. | |
1432 | * However, historically the code has only checked that *any* flag is set | |
1433 | * to cause server verification to take place. Use of the other flags makes | |
1434 | * no sense in client mode. An attempt to clean up the semantics was | |
1435 | * reverted because at least one application *only* set | |
1436 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1437 | * server verification to take place, after the clean up it silently did | |
1438 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1439 | * sent to them because they are void functions. Therefore, we now use the | |
1440 | * (less clean) historic behaviour of performing validation if any flag is | |
1441 | * set. The *documented* interface remains the same. | |
1442 | */ | |
1443 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1444 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1445 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1446 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1447 | goto f_err; | |
1448 | } | |
1449 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1450 | if (i > 1) { | |
b9908bf9 | 1451 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1452 | al = SSL_AD_HANDSHAKE_FAILURE; |
1453 | goto f_err; | |
1454 | } | |
1455 | ||
c34b0f99 | 1456 | s->session->peer_chain = sk; |
0f113f3e MC |
1457 | /* |
1458 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1459 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1460 | */ |
1461 | x = sk_X509_value(sk, 0); | |
1462 | sk = NULL; | |
1463 | /* | |
1464 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1465 | */ | |
1466 | ||
8382fd3a | 1467 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1468 | |
55a9a16f | 1469 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1470 | x = NULL; |
1471 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1472 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1473 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1474 | goto f_err; | |
1475 | } | |
1476 | ||
1477 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1478 | if (i < 0) { |
0f113f3e MC |
1479 | x = NULL; |
1480 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1481 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1482 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1483 | goto f_err; | |
1484 | } | |
1485 | ||
55a9a16f | 1486 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 | 1487 | if (exp_idx >= 0 && i != exp_idx |
a230b26e EK |
1488 | && (exp_idx != SSL_PKEY_GOST_EC || |
1489 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1490 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1491 | x = NULL; |
1492 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1493 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1494 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1495 | goto f_err; | |
0f113f3e | 1496 | } |
a273c6ee | 1497 | s->session->peer_type = i; |
55a9a16f MC |
1498 | |
1499 | X509_free(s->session->peer); | |
05f0fb9f | 1500 | X509_up_ref(x); |
55a9a16f | 1501 | s->session->peer = x; |
0f113f3e MC |
1502 | s->session->verify_result = s->verify_result; |
1503 | ||
1504 | x = NULL; | |
b9908bf9 | 1505 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1506 | goto done; |
1507 | ||
0f113f3e | 1508 | f_err: |
66696478 | 1509 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1510 | err: |
fe3a3291 | 1511 | ossl_statem_set_error(s); |
66696478 | 1512 | done: |
0f113f3e MC |
1513 | X509_free(x); |
1514 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1515 | return ret; |
0f113f3e | 1516 | } |
d02b48c6 | 1517 | |
7dc1c647 | 1518 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1519 | { |
1520 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1521 | PACKET psk_identity_hint; |
02a74590 | 1522 | |
7dc1c647 MC |
1523 | /* PSK ciphersuites are preceded by an identity hint */ |
1524 | ||
1525 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1526 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1527 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1528 | return 0; |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Store PSK identity hint for later use, hint is used in | |
1533 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1534 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1535 | * identity. | |
1536 | */ | |
1537 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1538 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1539 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1540 | return 0; |
1541 | } | |
02a74590 | 1542 | |
7dc1c647 MC |
1543 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1544 | OPENSSL_free(s->session->psk_identity_hint); | |
1545 | s->session->psk_identity_hint = NULL; | |
1546 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1547 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1548 | *al = SSL_AD_INTERNAL_ERROR; |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | return 1; | |
1553 | #else | |
4fa88861 | 1554 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1555 | *al = SSL_AD_INTERNAL_ERROR; |
1556 | return 0; | |
02a74590 MC |
1557 | #endif |
1558 | } | |
1559 | ||
25c6c10c MC |
1560 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1561 | { | |
1562 | #ifndef OPENSSL_NO_SRP | |
1563 | PACKET prime, generator, salt, server_pub; | |
1564 | ||
1565 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1566 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1567 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1568 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1569 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1570 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1571 | return 0; |
1572 | } | |
1573 | ||
348240c6 | 1574 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1575 | if ((s->srp_ctx.N = |
1576 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1577 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1578 | || (s->srp_ctx.g = |
1579 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1580 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1581 | || (s->srp_ctx.s = |
1582 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1583 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1584 | || (s->srp_ctx.B = |
1585 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1586 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1587 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1588 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1589 | return 0; |
1590 | } | |
1591 | ||
1592 | if (!srp_verify_server_param(s, al)) { | |
1593 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1594 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1595 | return 0; |
1596 | } | |
1597 | ||
1598 | /* We must check if there is a certificate */ | |
a230b26e | 1599 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1600 | *pkey = X509_get0_pubkey(s->session->peer); |
1601 | ||
1602 | return 1; | |
1603 | #else | |
4fa88861 | 1604 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1605 | *al = SSL_AD_INTERNAL_ERROR; |
1606 | return 0; | |
1607 | #endif | |
1608 | } | |
1609 | ||
e01a610d MC |
1610 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1611 | { | |
1612 | #ifndef OPENSSL_NO_DH | |
1613 | PACKET prime, generator, pub_key; | |
1614 | EVP_PKEY *peer_tmp = NULL; | |
1615 | ||
1616 | DH *dh = NULL; | |
1617 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1618 | ||
1619 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1620 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1621 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1622 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1623 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1624 | return 0; |
1625 | } | |
1626 | ||
1627 | peer_tmp = EVP_PKEY_new(); | |
1628 | dh = DH_new(); | |
1629 | ||
1630 | if (peer_tmp == NULL || dh == NULL) { | |
1631 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1632 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1633 | goto err; |
1634 | } | |
1635 | ||
348240c6 MC |
1636 | /* TODO(size_t): Convert these calls */ |
1637 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1638 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1639 | NULL); | |
1640 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1641 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1642 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1643 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1644 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1645 | goto err; |
1646 | } | |
1647 | ||
1648 | if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) { | |
1649 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1650 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1651 | goto err; |
1652 | } | |
1653 | ||
1654 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1655 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1656 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1657 | goto err; |
1658 | } | |
1659 | p = g = NULL; | |
1660 | ||
1661 | if (!DH_set0_key(dh, bnpub_key, NULL)) { | |
1662 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1663 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1664 | goto err; |
1665 | } | |
1666 | bnpub_key = NULL; | |
1667 | ||
1668 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1669 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1670 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1671 | goto err; |
1672 | } | |
1673 | ||
1674 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1675 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1676 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1677 | goto err; |
1678 | } | |
1679 | ||
1680 | s->s3->peer_tmp = peer_tmp; | |
1681 | ||
1682 | /* | |
1683 | * FIXME: This makes assumptions about which ciphersuites come with | |
1684 | * public keys. We should have a less ad-hoc way of doing this | |
1685 | */ | |
a230b26e | 1686 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1687 | *pkey = X509_get0_pubkey(s->session->peer); |
1688 | /* else anonymous DH, so no certificate or pkey. */ | |
1689 | ||
1690 | return 1; | |
1691 | ||
1692 | err: | |
1693 | BN_free(p); | |
1694 | BN_free(g); | |
1695 | BN_free(bnpub_key); | |
1696 | DH_free(dh); | |
1697 | EVP_PKEY_free(peer_tmp); | |
1698 | ||
1699 | return 0; | |
1700 | #else | |
4fa88861 | 1701 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1702 | *al = SSL_AD_INTERNAL_ERROR; |
1703 | return 0; | |
1704 | #endif | |
1705 | } | |
1706 | ||
ff74aeb1 MC |
1707 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1708 | { | |
1709 | #ifndef OPENSSL_NO_EC | |
1710 | PACKET encoded_pt; | |
1711 | const unsigned char *ecparams; | |
1712 | int curve_nid; | |
ec24630a | 1713 | unsigned int curve_flags; |
ff74aeb1 MC |
1714 | EVP_PKEY_CTX *pctx = NULL; |
1715 | ||
1716 | /* | |
1717 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1718 | * public key. For now we only support named (not generic) curves and | |
1719 | * ECParameters in this case is just three bytes. | |
1720 | */ | |
1721 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1722 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1723 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1724 | return 0; |
1725 | } | |
1726 | /* | |
1727 | * Check curve is one of our preferences, if not server has sent an | |
1728 | * invalid curve. ECParameters is 3 bytes. | |
1729 | */ | |
1730 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1731 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1732 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1733 | return 0; |
1734 | } | |
1735 | ||
ec24630a DSH |
1736 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1737 | ||
a230b26e | 1738 | if (curve_nid == 0) { |
ff74aeb1 | 1739 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1740 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1741 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1742 | return 0; | |
1743 | } | |
1744 | ||
ec24630a DSH |
1745 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1746 | EVP_PKEY *key = EVP_PKEY_new(); | |
1747 | ||
1748 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1749 | *al = SSL_AD_INTERNAL_ERROR; | |
1750 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1751 | EVP_PKEY_free(key); | |
1752 | return 0; | |
1753 | } | |
1754 | s->s3->peer_tmp = key; | |
1755 | } else { | |
1756 | /* Set up EVP_PKEY with named curve as parameters */ | |
1757 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1758 | if (pctx == NULL | |
1759 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1760 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1761 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1762 | *al = SSL_AD_INTERNAL_ERROR; | |
1763 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1764 | EVP_PKEY_CTX_free(pctx); | |
1765 | return 0; | |
1766 | } | |
ff74aeb1 | 1767 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1768 | pctx = NULL; |
ff74aeb1 | 1769 | } |
ff74aeb1 MC |
1770 | |
1771 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1772 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1773 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1774 | return 0; |
1775 | } | |
1776 | ||
ec24630a DSH |
1777 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1778 | PACKET_data(&encoded_pt), | |
1779 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1780 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1781 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1782 | return 0; |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1787 | * ECParameters in the server key exchange message. We do support RSA | |
1788 | * and ECDSA. | |
1789 | */ | |
1790 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1791 | *pkey = X509_get0_pubkey(s->session->peer); | |
1792 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1793 | *pkey = X509_get0_pubkey(s->session->peer); | |
1794 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1795 | ||
1796 | return 1; | |
1797 | #else | |
4fa88861 | 1798 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1799 | *al = SSL_AD_INTERNAL_ERROR; |
1800 | return 0; | |
1801 | #endif | |
1802 | } | |
1803 | ||
be3583fa | 1804 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1805 | { |
7dc1c647 | 1806 | int al = -1; |
e1e588ac | 1807 | long alg_k; |
b9908bf9 | 1808 | EVP_PKEY *pkey = NULL; |
73999b62 | 1809 | PACKET save_param_start, signature; |
b9908bf9 | 1810 | |
b9908bf9 MC |
1811 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1812 | ||
73999b62 | 1813 | save_param_start = *pkt; |
8d92c1f8 | 1814 | |
3260adf1 | 1815 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1816 | EVP_PKEY_free(s->s3->peer_tmp); |
1817 | s->s3->peer_tmp = NULL; | |
3260adf1 | 1818 | #endif |
d02b48c6 | 1819 | |
7689082b | 1820 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
1821 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
1822 | goto err; | |
7689082b DSH |
1823 | } |
1824 | ||
1825 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1826 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
1827 | } else if (alg_k & SSL_kSRP) { |
1828 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 1829 | goto err; |
e01a610d MC |
1830 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
1831 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
1832 | goto err; | |
ff74aeb1 MC |
1833 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
1834 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
1835 | goto err; | |
0f113f3e MC |
1836 | } else if (alg_k) { |
1837 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1838 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 1839 | goto err; |
0f113f3e | 1840 | } |
0f113f3e | 1841 | |
0f113f3e MC |
1842 | /* if it was signed, check the signature */ |
1843 | if (pkey != NULL) { | |
32942870 | 1844 | PACKET params; |
be8dba2c MC |
1845 | int maxsig; |
1846 | const EVP_MD *md = NULL; | |
e1e588ac MC |
1847 | EVP_MD_CTX *md_ctx; |
1848 | ||
32942870 EK |
1849 | /* |
1850 | * |pkt| now points to the beginning of the signature, so the difference | |
1851 | * equals the length of the parameters. | |
1852 | */ | |
1853 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1854 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1855 | PACKET_remaining(pkt))) { |
32942870 | 1856 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1857 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1858 | goto err; |
32942870 EK |
1859 | } |
1860 | ||
0f113f3e | 1861 | if (SSL_USE_SIGALGS(s)) { |
b6981744 | 1862 | const unsigned char *sigalgs; |
0f113f3e | 1863 | int rv; |
73999b62 | 1864 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
e1e588ac | 1865 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1866 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 1867 | goto err; |
0f113f3e | 1868 | } |
32942870 | 1869 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
e1e588ac MC |
1870 | if (rv == -1) { |
1871 | al = SSL_AD_INTERNAL_ERROR; | |
1872 | goto err; | |
1873 | } else if (rv == 0) { | |
1874 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 1875 | goto err; |
0f113f3e | 1876 | } |
a2f9200f | 1877 | #ifdef SSL_DEBUG |
0f113f3e MC |
1878 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1879 | #endif | |
3aeb9348 | 1880 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1881 | md = EVP_md5_sha1(); |
32942870 | 1882 | } else { |
0f113f3e | 1883 | md = EVP_sha1(); |
32942870 | 1884 | } |
0f113f3e | 1885 | |
73999b62 MC |
1886 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1887 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 1888 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1889 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 1890 | goto err; |
0f113f3e | 1891 | } |
be8dba2c MC |
1892 | maxsig = EVP_PKEY_size(pkey); |
1893 | if (maxsig < 0) { | |
e1e588ac | 1894 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1895 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1896 | goto err; |
8098fc56 | 1897 | } |
0f113f3e MC |
1898 | |
1899 | /* | |
8098fc56 | 1900 | * Check signature length |
0f113f3e | 1901 | */ |
be8dba2c | 1902 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 1903 | /* wrong packet length */ |
e1e588ac | 1904 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
1905 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
1906 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
1907 | goto err; |
1908 | } | |
1909 | ||
1910 | md_ctx = EVP_MD_CTX_new(); | |
1911 | if (md_ctx == NULL) { | |
1912 | al = SSL_AD_INTERNAL_ERROR; | |
1913 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1914 | goto err; | |
0f113f3e | 1915 | } |
e1e588ac | 1916 | |
6e59a892 | 1917 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
a230b26e EK |
1918 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), |
1919 | SSL3_RANDOM_SIZE) <= 0 | |
1920 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
1921 | SSL3_RANDOM_SIZE) <= 0 | |
1922 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), | |
1923 | PACKET_remaining(¶ms)) <= 0) { | |
e1e588ac | 1924 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1925 | al = SSL_AD_INTERNAL_ERROR; |
1926 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 1927 | goto err; |
192e4bbb | 1928 | } |
348240c6 | 1929 | /* TODO(size_t): Convert this call */ |
6e59a892 | 1930 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
348240c6 MC |
1931 | (unsigned int)PACKET_remaining(&signature), |
1932 | pkey) <= 0) { | |
192e4bbb | 1933 | /* bad signature */ |
e1e588ac | 1934 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1935 | al = SSL_AD_DECRYPT_ERROR; |
1936 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 1937 | goto err; |
0f113f3e | 1938 | } |
e1e588ac | 1939 | EVP_MD_CTX_free(md_ctx); |
0f113f3e | 1940 | } else { |
7689082b | 1941 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 1942 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 1943 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 1944 | /* Might be wrong key type, check it */ |
e1e588ac | 1945 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 1946 | /* Otherwise this shouldn't happen */ |
e1e588ac | 1947 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1948 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
1949 | } else { |
1950 | al = SSL_AD_DECODE_ERROR; | |
1951 | } | |
0f113f3e MC |
1952 | goto err; |
1953 | } | |
1954 | /* still data left over */ | |
73999b62 | 1955 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 1956 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1957 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 1958 | goto err; |
0f113f3e MC |
1959 | } |
1960 | } | |
e1e588ac | 1961 | |
b9908bf9 | 1962 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 1963 | err: |
7dc1c647 MC |
1964 | if (al != -1) |
1965 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1966 | ossl_statem_set_error(s); |
b9908bf9 | 1967 | return MSG_PROCESS_ERROR; |
0f113f3e | 1968 | } |
d02b48c6 | 1969 | |
be3583fa | 1970 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1971 | { |
1972 | int ret = MSG_PROCESS_ERROR; | |
1973 | unsigned int list_len, ctype_num, i, name_len; | |
1974 | X509_NAME *xn = NULL; | |
b6981744 EK |
1975 | const unsigned char *data; |
1976 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 1977 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
1978 | |
1979 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1980 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1981 | goto err; |
1982 | } | |
1983 | ||
1984 | /* get the certificate types */ | |
73999b62 | 1985 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 1986 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 1987 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1988 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1989 | goto err; |
1990 | } | |
b548a1f1 RS |
1991 | OPENSSL_free(s->cert->ctypes); |
1992 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1993 | if (ctype_num > SSL3_CT_NUMBER) { |
1994 | /* If we exceed static buffer copy all to cert structure */ | |
1995 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1996 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1997 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1998 | goto err; |
1999 | } | |
ac112332 | 2000 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 2001 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
2002 | ctype_num = SSL3_CT_NUMBER; |
2003 | } | |
2004 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2005 | s->s3->tmp.ctype[i] = data[i]; |
2006 | ||
0f113f3e | 2007 | if (SSL_USE_SIGALGS(s)) { |
73999b62 | 2008 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2009 | || !PACKET_get_bytes(pkt, &data, list_len)) { |
0f113f3e | 2010 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2011 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2012 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2013 | goto err; |
2014 | } | |
ac112332 | 2015 | |
0f113f3e MC |
2016 | /* Clear certificate digests and validity flags */ |
2017 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2018 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2019 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2020 | } |
ac112332 | 2021 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 2022 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2023 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2024 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2025 | goto err; | |
2026 | } | |
2027 | if (!tls1_process_sigalgs(s)) { | |
2028 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2029 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2030 | goto err; |
2031 | } | |
a0f63828 DSH |
2032 | } else { |
2033 | ssl_set_default_md(s); | |
0f113f3e MC |
2034 | } |
2035 | ||
2036 | /* get the CA RDNs */ | |
73999b62 | 2037 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2038 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2039 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2040 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2041 | goto err; |
2042 | } | |
2043 | ||
73999b62 MC |
2044 | while (PACKET_remaining(pkt)) { |
2045 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2046 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2047 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2048 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2049 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2050 | goto err; |
2051 | } | |
2052 | ||
ac112332 | 2053 | namestart = namebytes; |
0f113f3e | 2054 | |
ac112332 MC |
2055 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2056 | name_len)) == NULL) { | |
3c33c6f6 | 2057 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2058 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2059 | goto err; |
0f113f3e MC |
2060 | } |
2061 | ||
ac112332 | 2062 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2063 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2064 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2065 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2066 | goto err; | |
2067 | } | |
2068 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2069 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2070 | goto err; |
2071 | } | |
6afef8b1 | 2072 | xn = NULL; |
0f113f3e MC |
2073 | } |
2074 | ||
0f113f3e MC |
2075 | /* we should setup a certificate to return.... */ |
2076 | s->s3->tmp.cert_req = 1; | |
2077 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2078 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2079 | s->s3->tmp.ca_names = ca_sk; |
2080 | ca_sk = NULL; | |
2081 | ||
05c4f1d5 | 2082 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2083 | goto done; |
0f113f3e | 2084 | err: |
fe3a3291 | 2085 | ossl_statem_set_error(s); |
cc273a93 | 2086 | done: |
6afef8b1 | 2087 | X509_NAME_free(xn); |
222561fe | 2088 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2089 | return ret; |
0f113f3e MC |
2090 | } |
2091 | ||
2092 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2093 | { |
0f113f3e | 2094 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2095 | } |
dfeab068 | 2096 | |
be3583fa | 2097 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2098 | { |
2099 | int al; | |
2100 | unsigned int ticklen; | |
2101 | unsigned long ticket_lifetime_hint; | |
ec60ccc1 | 2102 | unsigned int sess_len; |
b9908bf9 | 2103 | |
73999b62 | 2104 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
a230b26e EK |
2105 | || !PACKET_get_net_2(pkt, &ticklen) |
2106 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2107 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2108 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2109 | goto f_err; |
2110 | } | |
2111 | ||
2112 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2113 | if (ticklen == 0) | |
c9de4a20 | 2114 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2115 | |
98ece4ee MC |
2116 | if (s->session->session_id_length > 0) { |
2117 | int i = s->session_ctx->session_cache_mode; | |
2118 | SSL_SESSION *new_sess; | |
2119 | /* | |
2120 | * We reused an existing session, so we need to replace it with a new | |
2121 | * one | |
2122 | */ | |
2123 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2124 | /* | |
e4612d02 | 2125 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2126 | */ |
e4612d02 | 2127 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2128 | } |
2129 | ||
2130 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2131 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2132 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2133 | goto f_err; |
2134 | } | |
2135 | ||
2136 | SSL_SESSION_free(s->session); | |
2137 | s->session = new_sess; | |
2138 | } | |
2139 | ||
b548a1f1 RS |
2140 | OPENSSL_free(s->session->tlsext_tick); |
2141 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2142 | |
0f113f3e | 2143 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 2144 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 2145 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2146 | goto err; |
2147 | } | |
73999b62 | 2148 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2149 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2150 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2151 | goto f_err; |
2152 | } | |
e711da71 EK |
2153 | |
2154 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2155 | s->session->tlsext_ticklen = ticklen; |
2156 | /* | |
2157 | * There are two ways to detect a resumed ticket session. One is to set | |
2158 | * an appropriate session ID and then the server must return a match in | |
2159 | * ServerHello. This allows the normal client session ID matching to work | |
2160 | * and we know much earlier that the ticket has been accepted. The | |
2161 | * other way is to set zero length session ID when the ticket is | |
2162 | * presented and rely on the handshake to determine session resumption. | |
2163 | * We choose the former approach because this fits in with assumptions | |
2164 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2165 | * SHA256 is disabled) hash of the ticket. | |
2166 | */ | |
ec60ccc1 MC |
2167 | /* |
2168 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2169 | * but s->session->session_id_length is a size_t | |
2170 | */ | |
d166ed8c | 2171 | if (!EVP_Digest(s->session->tlsext_tick, ticklen, |
ec60ccc1 | 2172 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2173 | EVP_sha256(), NULL)) { |
2174 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2175 | goto err; | |
2176 | } | |
ec60ccc1 | 2177 | s->session->session_id_length = sess_len; |
b9908bf9 | 2178 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2179 | f_err: |
2180 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2181 | err: | |
fe3a3291 | 2182 | ossl_statem_set_error(s); |
b9908bf9 | 2183 | return MSG_PROCESS_ERROR; |
0f113f3e | 2184 | } |
67c8e7f4 | 2185 | |
be3583fa | 2186 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2187 | { |
2188 | int al; | |
8b0e934a | 2189 | size_t resplen; |
b9908bf9 | 2190 | unsigned int type; |
b9908bf9 | 2191 | |
73999b62 | 2192 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2193 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2194 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2195 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2196 | goto f_err; |
2197 | } | |
56a26ce3 MC |
2198 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2199 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2200 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2201 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2202 | goto f_err; |
2203 | } | |
ac63710a | 2204 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2205 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2206 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2207 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2208 | goto f_err; |
2209 | } | |
73999b62 | 2210 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2211 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2212 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2213 | goto f_err; |
2214 | } | |
0f113f3e | 2215 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2216 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2217 | f_err: |
2218 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2219 | ossl_statem_set_error(s); |
b9908bf9 | 2220 | return MSG_PROCESS_ERROR; |
0f113f3e | 2221 | } |
d02b48c6 | 2222 | |
be3583fa | 2223 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2224 | { |
73999b62 | 2225 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2226 | /* should contain no data */ |
2227 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2228 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2229 | ossl_statem_set_error(s); |
b9908bf9 | 2230 | return MSG_PROCESS_ERROR; |
0f113f3e | 2231 | } |
b9908bf9 MC |
2232 | #ifndef OPENSSL_NO_SRP |
2233 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2234 | if (SRP_Calc_A_param(s) <= 0) { | |
2235 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2236 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2237 | ossl_statem_set_error(s); |
b9908bf9 MC |
2238 | return MSG_PROCESS_ERROR; |
2239 | } | |
2240 | } | |
2241 | #endif | |
2242 | ||
a455d0f6 MC |
2243 | /* |
2244 | * at this point we check that we have the required stuff from | |
2245 | * the server | |
2246 | */ | |
2247 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2248 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2249 | ossl_statem_set_error(s); |
a455d0f6 MC |
2250 | return MSG_PROCESS_ERROR; |
2251 | } | |
2252 | ||
bb1aaab4 MC |
2253 | /* |
2254 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2255 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2256 | * message, or NULL and -1 otherwise | |
2257 | */ | |
b1931d43 | 2258 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2259 | int ret; |
2260 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2261 | if (ret == 0) { | |
2262 | ssl3_send_alert(s, SSL3_AL_FATAL, | |
2263 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE); | |
2264 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, | |
2265 | SSL_R_INVALID_STATUS_RESPONSE); | |
2266 | return MSG_PROCESS_ERROR; | |
2267 | } | |
2268 | if (ret < 0) { | |
2269 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2270 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE); | |
2271 | return MSG_PROCESS_ERROR; | |
2272 | } | |
2273 | } | |
ed29e82a RP |
2274 | #ifndef OPENSSL_NO_CT |
2275 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2276 | /* Note we validate the SCTs whether or not we abort on error */ |
2277 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
ed29e82a RP |
2278 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2279 | return MSG_PROCESS_ERROR; | |
2280 | } | |
2281 | } | |
2282 | #endif | |
2283 | ||
473483d4 MC |
2284 | #ifndef OPENSSL_NO_SCTP |
2285 | /* Only applies to renegotiation */ | |
2286 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2287 | && s->renegotiate != 0) |
473483d4 MC |
2288 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2289 | else | |
2290 | #endif | |
2291 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2292 | } |
176f31dd | 2293 | |
f1ec23c0 | 2294 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2295 | { |
7689082b | 2296 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2297 | int ret = 0; |
2298 | /* | |
2299 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2300 | * \0-terminated identity. The last byte is for us for simulating | |
2301 | * strnlen. | |
2302 | */ | |
2303 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2304 | size_t identitylen = 0; | |
2305 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2306 | unsigned char *tmppsk = NULL; | |
2307 | char *tmpidentity = NULL; | |
2308 | size_t psklen = 0; | |
2309 | ||
2310 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2311 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2312 | *al = SSL_AD_INTERNAL_ERROR; |
2313 | goto err; | |
2314 | } | |
d02b48c6 | 2315 | |
13c0ec4a | 2316 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2317 | |
13c0ec4a MC |
2318 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2319 | identity, sizeof(identity) - 1, | |
2320 | psk, sizeof(psk)); | |
7689082b | 2321 | |
13c0ec4a | 2322 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2323 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2324 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2325 | goto err; | |
2326 | } else if (psklen == 0) { | |
05ec6a25 | 2327 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2328 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2329 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2330 | goto err; | |
2331 | } | |
7689082b | 2332 | |
13c0ec4a MC |
2333 | identitylen = strlen(identity); |
2334 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2335 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2336 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2337 | goto err; | |
2338 | } | |
7689082b | 2339 | |
13c0ec4a MC |
2340 | tmppsk = OPENSSL_memdup(psk, psklen); |
2341 | tmpidentity = OPENSSL_strdup(identity); | |
2342 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2343 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2344 | *al = SSL_AD_INTERNAL_ERROR; |
2345 | goto err; | |
2346 | } | |
7689082b | 2347 | |
13c0ec4a MC |
2348 | OPENSSL_free(s->s3->tmp.psk); |
2349 | s->s3->tmp.psk = tmppsk; | |
2350 | s->s3->tmp.psklen = psklen; | |
2351 | tmppsk = NULL; | |
2352 | OPENSSL_free(s->session->psk_identity); | |
2353 | s->session->psk_identity = tmpidentity; | |
2354 | tmpidentity = NULL; | |
f1ec23c0 | 2355 | |
b2b3024e | 2356 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2357 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2358 | *al = SSL_AD_INTERNAL_ERROR; | |
2359 | goto err; | |
2360 | } | |
7689082b | 2361 | |
13c0ec4a | 2362 | ret = 1; |
0bce0b02 | 2363 | |
13c0ec4a MC |
2364 | err: |
2365 | OPENSSL_cleanse(psk, psklen); | |
2366 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2367 | OPENSSL_clear_free(tmppsk, psklen); | |
2368 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2369 | |
13c0ec4a MC |
2370 | return ret; |
2371 | #else | |
05ec6a25 | 2372 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2373 | *al = SSL_AD_INTERNAL_ERROR; |
2374 | return 0; | |
b9908bf9 | 2375 | #endif |
13c0ec4a | 2376 | } |
b9908bf9 | 2377 | |
f1ec23c0 | 2378 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2379 | { |
bc36ee62 | 2380 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2381 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2382 | EVP_PKEY *pkey = NULL; |
2383 | EVP_PKEY_CTX *pctx = NULL; | |
2384 | size_t enclen; | |
2385 | unsigned char *pms = NULL; | |
2386 | size_t pmslen = 0; | |
b9908bf9 | 2387 | |
13c0ec4a MC |
2388 | if (s->session->peer == NULL) { |
2389 | /* | |
2390 | * We should always have a server certificate with SSL_kRSA. | |
2391 | */ | |
05ec6a25 | 2392 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2393 | return 0; |
2394 | } | |
0f113f3e | 2395 | |
13c0ec4a MC |
2396 | pkey = X509_get0_pubkey(s->session->peer); |
2397 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2398 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2399 | return 0; |
2400 | } | |
0f113f3e | 2401 | |
13c0ec4a MC |
2402 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2403 | pms = OPENSSL_malloc(pmslen); | |
2404 | if (pms == NULL) { | |
05ec6a25 | 2405 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2406 | *al = SSL_AD_INTERNAL_ERROR; |
2407 | return 0; | |
2408 | } | |
0bce0b02 | 2409 | |
13c0ec4a MC |
2410 | pms[0] = s->client_version >> 8; |
2411 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2412 | /* TODO(size_t): Convert this function */ |
2413 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2414 | goto err; |
2415 | } | |
0f113f3e | 2416 | |
13c0ec4a | 2417 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2418 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2419 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2420 | goto err; | |
2421 | } | |
13c0ec4a MC |
2422 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2423 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2424 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2425 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2426 | goto err; |
2427 | } | |
f1ec23c0 MC |
2428 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2429 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2430 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2431 | goto err; |
2432 | } | |
13c0ec4a MC |
2433 | EVP_PKEY_CTX_free(pctx); |
2434 | pctx = NULL; | |
0f113f3e | 2435 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2436 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2437 | (*p)[1]++; | |
2438 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2439 | tmp_buf[0] = 0x70; | |
0f113f3e | 2440 | # endif |
0f113f3e | 2441 | |
13c0ec4a | 2442 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2443 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2444 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2445 | goto err; | |
b9908bf9 | 2446 | } |
13c0ec4a MC |
2447 | |
2448 | s->s3->tmp.pms = pms; | |
2449 | s->s3->tmp.pmslen = pmslen; | |
2450 | ||
2451 | return 1; | |
2452 | err: | |
2453 | OPENSSL_clear_free(pms, pmslen); | |
2454 | EVP_PKEY_CTX_free(pctx); | |
2455 | ||
2456 | return 0; | |
2457 | #else | |
05ec6a25 | 2458 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2459 | *al = SSL_AD_INTERNAL_ERROR; |
2460 | return 0; | |
f9b3bff6 | 2461 | #endif |
13c0ec4a MC |
2462 | } |
2463 | ||
f1ec23c0 | 2464 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2465 | { |
2466 | #ifndef OPENSSL_NO_DH | |
2467 | DH *dh_clnt = NULL; | |
2468 | const BIGNUM *pub_key; | |
2469 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2470 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2471 | |
2472 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2473 | if (skey == NULL) |
2474 | goto err; | |
2475 | ||
0a699a07 | 2476 | ckey = ssl_generate_pkey(skey); |
a8c1c704 MC |
2477 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2478 | ||
0f1e51ea | 2479 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2480 | goto err; |
a8c1c704 MC |
2481 | |
2482 | /* send off the data */ | |
2483 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2484 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2485 | goto err; |
2486 | ||
2487 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2488 | EVP_PKEY_free(ckey); |
2489 | ||
2490 | return 1; | |
f1ec23c0 MC |
2491 | err: |
2492 | EVP_PKEY_free(ckey); | |
2493 | #endif | |
05ec6a25 | 2494 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2495 | *al = SSL_AD_INTERNAL_ERROR; |
2496 | return 0; | |
a8c1c704 MC |
2497 | } |
2498 | ||
f1ec23c0 | 2499 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2500 | { |
2501 | #ifndef OPENSSL_NO_EC | |
2502 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2503 | size_t encoded_pt_len = 0; |
67ad5aab | 2504 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2505 | int ret = 0; |
67ad5aab MC |
2506 | |
2507 | skey = s->s3->peer_tmp; | |
ec24630a | 2508 | if (skey == NULL) { |
05ec6a25 | 2509 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2510 | return 0; |
2511 | } | |
2512 | ||
0a699a07 | 2513 | ckey = ssl_generate_pkey(skey); |
67ad5aab | 2514 | |
0f1e51ea | 2515 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2516 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2517 | goto err; |
2518 | } | |
2519 | ||
2520 | /* Generate encoding of client key */ | |
ec24630a | 2521 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2522 | |
2523 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2524 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2525 | goto err; |
2526 | } | |
2527 | ||
b2b3024e | 2528 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2529 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2530 | goto err; | |
2531 | } | |
67ad5aab | 2532 | |
f1ec23c0 | 2533 | ret = 1; |
67ad5aab | 2534 | err: |
f1ec23c0 | 2535 | OPENSSL_free(encodedPoint); |
67ad5aab | 2536 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2537 | return ret; |
67ad5aab | 2538 | #else |
05ec6a25 | 2539 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2540 | *al = SSL_AD_INTERNAL_ERROR; |
2541 | return 0; | |
2542 | #endif | |
2543 | } | |
2544 | ||
f1ec23c0 | 2545 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2546 | { |
2547 | #ifndef OPENSSL_NO_GOST | |
2548 | /* GOST key exchange message creation */ | |
2549 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2550 | X509 *peer_cert; | |
2551 | size_t msglen; | |
2552 | unsigned int md_len; | |
2553 | unsigned char shared_ukm[32], tmp[256]; | |
2554 | EVP_MD_CTX *ukm_hash = NULL; | |
2555 | int dgst_nid = NID_id_GostR3411_94; | |
2556 | unsigned char *pms = NULL; | |
2557 | size_t pmslen = 0; | |
2558 | ||
2559 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2560 | dgst_nid = NID_id_GostR3411_2012_256; | |
2561 | ||
2562 | /* | |
2563 | * Get server sertificate PKEY and create ctx from it | |
2564 | */ | |
2565 | peer_cert = s->session->peer; | |
2566 | if (!peer_cert) { | |
2567 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2568 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2569 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2570 | return 0; | |
2571 | } | |
2572 | ||
2573 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2574 | if (pkey_ctx == NULL) { | |
2575 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2576 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2577 | return 0; |
2578 | } | |
2579 | /* | |
2580 | * If we have send a certificate, and certificate key | |
2581 | * parameters match those of server certificate, use | |
2582 | * certificate key for key exchange | |
2583 | */ | |
2584 | ||
2585 | /* Otherwise, generate ephemeral key pair */ | |
2586 | pmslen = 32; | |
2587 | pms = OPENSSL_malloc(pmslen); | |
2588 | if (pms == NULL) { | |
2589 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2590 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2591 | goto err; |
e00e0b3d MC |
2592 | } |
2593 | ||
2594 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2595 | /* Generate session key |
2596 | * TODO(size_t): Convert this function | |
2597 | */ | |
2598 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2599 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2600 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2601 | goto err; |
2602 | }; | |
e00e0b3d MC |
2603 | /* |
2604 | * Compute shared IV and store it in algorithm-specific context | |
2605 | * data | |
2606 | */ | |
2607 | ukm_hash = EVP_MD_CTX_new(); | |
2608 | if (ukm_hash == NULL | |
a230b26e EK |
2609 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2610 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2611 | SSL3_RANDOM_SIZE) <= 0 | |
2612 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2613 | SSL3_RANDOM_SIZE) <= 0 | |
2614 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2615 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2616 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2617 | goto err; |
2618 | } | |
2619 | EVP_MD_CTX_free(ukm_hash); | |
2620 | ukm_hash = NULL; | |
2621 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2622 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2623 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2624 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2625 | goto err; |
2626 | } | |
2627 | /* Make GOST keytransport blob message */ | |
2628 | /* | |
2629 | * Encapsulate it into sequence | |
2630 | */ | |
e00e0b3d MC |
2631 | msglen = 255; |
2632 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2633 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2634 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2635 | goto err; |
2636 | } | |
f1ec23c0 | 2637 | |
08029dfa MC |
2638 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2639 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2640 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2641 | *al = SSL_AD_INTERNAL_ERROR; |
2642 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2643 | goto err; | |
e00e0b3d | 2644 | } |
f1ec23c0 | 2645 | |
e00e0b3d MC |
2646 | EVP_PKEY_CTX_free(pkey_ctx); |
2647 | s->s3->tmp.pms = pms; | |
2648 | s->s3->tmp.pmslen = pmslen; | |
2649 | ||
2650 | return 1; | |
2651 | err: | |
2652 | EVP_PKEY_CTX_free(pkey_ctx); | |
2653 | OPENSSL_clear_free(pms, pmslen); | |
2654 | EVP_MD_CTX_free(ukm_hash); | |
2655 | return 0; | |
2656 | #else | |
05ec6a25 | 2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2658 | *al = SSL_AD_INTERNAL_ERROR; |
2659 | return 0; | |
2660 | #endif | |
2661 | } | |
2662 | ||
f1ec23c0 | 2663 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2664 | { |
8b9546c7 | 2665 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2666 | unsigned char *abytes = NULL; |
2667 | ||
2668 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2669 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2670 | &abytes)) { | |
05ec6a25 | 2671 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2672 | return 0; |
2673 | } | |
f1ec23c0 MC |
2674 | BN_bn2bin(s->srp_ctx.A, abytes); |
2675 | ||
840a2bf8 MC |
2676 | OPENSSL_free(s->session->srp_username); |
2677 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2678 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2679 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2680 | return 0; |
2681 | } | |
2682 | ||
2683 | return 1; | |
2684 | #else | |
05ec6a25 | 2685 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2686 | *al = SSL_AD_INTERNAL_ERROR; |
2687 | return 0; | |
2688 | #endif | |
2689 | } | |
2690 | ||
7cea05dc | 2691 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2692 | { |
13c0ec4a MC |
2693 | unsigned long alg_k; |
2694 | int al = -1; | |
2695 | ||
f1ec23c0 | 2696 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2697 | |
13c0ec4a | 2698 | if ((alg_k & SSL_PSK) |
7cea05dc | 2699 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2700 | goto err; |
2701 | ||
f1ec23c0 | 2702 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2703 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 2704 | goto err; |
a8c1c704 | 2705 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 2706 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 2707 | goto err; |
67ad5aab | 2708 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 2709 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 2710 | goto err; |
e00e0b3d | 2711 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 2712 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 2713 | goto err; |
840a2bf8 | 2714 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 2715 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 2716 | goto err; |
4a424545 | 2717 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
2718 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2719 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2720 | goto err; | |
2721 | } | |
2722 | ||
b9908bf9 | 2723 | return 1; |
0f113f3e | 2724 | err: |
13c0ec4a MC |
2725 | if (al != -1) |
2726 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 2727 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 2728 | s->s3->tmp.pms = NULL; |
7689082b DSH |
2729 | #ifndef OPENSSL_NO_PSK |
2730 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2731 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2732 | #endif |
b9908bf9 MC |
2733 | return 0; |
2734 | } | |
2735 | ||
2736 | int tls_client_key_exchange_post_work(SSL *s) | |
2737 | { | |
2738 | unsigned char *pms = NULL; | |
2739 | size_t pmslen = 0; | |
2740 | ||
6f137370 MC |
2741 | pms = s->s3->tmp.pms; |
2742 | pmslen = s->s3->tmp.pmslen; | |
2743 | ||
b9908bf9 MC |
2744 | #ifndef OPENSSL_NO_SRP |
2745 | /* Check for SRP */ | |
2746 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2747 | if (!srp_generate_client_master_secret(s)) { | |
2748 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2749 | ERR_R_INTERNAL_ERROR); | |
2750 | goto err; | |
2751 | } | |
2752 | return 1; | |
2753 | } | |
2754 | #endif | |
b9908bf9 MC |
2755 | |
2756 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2757 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2758 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2759 | goto err; | |
2760 | } | |
2761 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2762 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2763 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
2764 | /* ssl_generate_master_secret frees the pms even on error */ |
2765 | pms = NULL; | |
2766 | pmslen = 0; | |
b9908bf9 MC |
2767 | goto err; |
2768 | } | |
6f137370 MC |
2769 | pms = NULL; |
2770 | pmslen = 0; | |
473483d4 MC |
2771 | |
2772 | #ifndef OPENSSL_NO_SCTP | |
2773 | if (SSL_IS_DTLS(s)) { | |
2774 | unsigned char sctpauthkey[64]; | |
2775 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2776 | ||
2777 | /* | |
2778 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2779 | * used. | |
2780 | */ | |
141eb8c6 MC |
2781 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2782 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2783 | |
2784 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
2785 | sizeof(sctpauthkey), labelbuffer, |
2786 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
2787 | goto err; |
2788 | ||
2789 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2790 | sizeof(sctpauthkey), sctpauthkey); | |
2791 | } | |
2792 | #endif | |
2793 | ||
b9908bf9 MC |
2794 | return 1; |
2795 | err: | |
2796 | OPENSSL_clear_free(pms, pmslen); | |
2797 | s->s3->tmp.pms = NULL; | |
2798 | return 0; | |
0f113f3e | 2799 | } |
d02b48c6 | 2800 | |
7cea05dc | 2801 | int tls_construct_client_verify(SSL *s, WPACKET *pkt) |
0f113f3e | 2802 | { |
0f113f3e | 2803 | EVP_PKEY *pkey; |
a0f63828 | 2804 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
5a008ff6 | 2805 | EVP_MD_CTX *mctx = NULL; |
0f113f3e | 2806 | unsigned u = 0; |
a0f63828 DSH |
2807 | long hdatalen = 0; |
2808 | void *hdata; | |
6400f338 | 2809 | unsigned char *sig = NULL; |
6400f338 | 2810 | |
bfb0641f | 2811 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2812 | if (mctx == NULL) { |
2813 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2814 | goto err; | |
2815 | } | |
b9908bf9 | 2816 | pkey = s->cert->key->privatekey; |
a0f63828 DSH |
2817 | |
2818 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2819 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2820 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2821 | goto err; | |
2822 | } | |
0f1e51ea | 2823 | |
7cea05dc | 2824 | if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) { |
6400f338 MC |
2825 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2826 | goto err; | |
a0f63828 | 2827 | } |
855a54a9 | 2828 | #ifdef SSL_DEBUG |
a0f63828 | 2829 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2830 | #endif |
6400f338 MC |
2831 | sig = OPENSSL_malloc(EVP_PKEY_size(pkey)); |
2832 | if (sig == NULL) { | |
2833 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2834 | goto err; | |
2835 | } | |
6e59a892 RL |
2836 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2837 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2838 | || (s->version == SSL3_VERSION |
6e59a892 | 2839 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
348240c6 | 2840 | (int)s->session->master_key_length, |
a0f63828 | 2841 | s->session->master_key)) |
6400f338 | 2842 | || !EVP_SignFinal(mctx, sig, &u, pkey)) { |
a0f63828 DSH |
2843 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2844 | goto err; | |
2845 | } | |
2a9b9654 | 2846 | #ifndef OPENSSL_NO_GOST |
3aeb9348 DSH |
2847 | { |
2848 | int pktype = EVP_PKEY_id(pkey); | |
2849 | if (pktype == NID_id_GostR3410_2001 | |
2850 | || pktype == NID_id_GostR3410_2012_256 | |
2851 | || pktype == NID_id_GostR3410_2012_512) | |
6400f338 | 2852 | BUF_reverse(sig, NULL, u); |
b9908bf9 | 2853 | } |
2a9b9654 | 2854 | #endif |
a0f63828 | 2855 | |
7cea05dc | 2856 | if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) { |
6400f338 MC |
2857 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2858 | goto err; | |
2859 | } | |
2860 | ||
a0f63828 DSH |
2861 | /* Digest cached records and discard handshake buffer */ |
2862 | if (!ssl3_digest_cached_records(s, 0)) | |
2863 | goto err; | |
6400f338 | 2864 | |
6400f338 | 2865 | OPENSSL_free(sig); |
bfb0641f | 2866 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2867 | return 1; |
0f113f3e | 2868 | err: |
6400f338 | 2869 | OPENSSL_free(sig); |
bfb0641f | 2870 | EVP_MD_CTX_free(mctx); |
6400f338 | 2871 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 | 2872 | return 0; |
0f113f3e MC |
2873 | } |
2874 | ||
2875 | /* | |
2876 | * Check a certificate can be used for client authentication. Currently check | |
2877 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2878 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2879 | */ |
2880 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2881 | { |
0f113f3e MC |
2882 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2883 | return 0; | |
2884 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2885 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2886 | return 0; |
2887 | /* | |
2888 | * If strict mode check suitability of chain before using it. This also | |
2889 | * adjusts suite B digest if necessary. | |
2890 | */ | |
2891 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2892 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2893 | return 0; | |
0f113f3e MC |
2894 | return 1; |
2895 | } | |
0d609395 | 2896 | |
be3583fa | 2897 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2898 | { |
2899 | X509 *x509 = NULL; | |
2900 | EVP_PKEY *pkey = NULL; | |
2901 | int i; | |
2902 | ||
b9908bf9 | 2903 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2904 | /* Let cert callback update client certificates if required */ |
2905 | if (s->cert->cert_cb) { | |
2906 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2907 | if (i < 0) { | |
2908 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2909 | return WORK_MORE_A; |
0f113f3e MC |
2910 | } |
2911 | if (i == 0) { | |
2912 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2913 | ossl_statem_set_error(s); |
0f113f3e MC |
2914 | return 0; |
2915 | } | |
2916 | s->rwstate = SSL_NOTHING; | |
2917 | } | |
2918 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2919 | return WORK_FINISHED_CONTINUE; |
2920 | ||
2921 | /* Fall through to WORK_MORE_B */ | |
2922 | wst = WORK_MORE_B; | |
0f113f3e MC |
2923 | } |
2924 | ||
2925 | /* We need to get a client cert */ | |
b9908bf9 | 2926 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2927 | /* |
2928 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2929 | * return(-1); We then get retied later | |
2930 | */ | |
0f113f3e MC |
2931 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2932 | if (i < 0) { | |
2933 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2934 | return WORK_MORE_B; |
0f113f3e MC |
2935 | } |
2936 | s->rwstate = SSL_NOTHING; | |
2937 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2938 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2939 | i = 0; | |
2940 | } else if (i == 1) { | |
2941 | i = 0; | |
b9908bf9 | 2942 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2943 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2944 | } | |
2945 | ||
222561fe | 2946 | X509_free(x509); |
25aaa98a | 2947 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2948 | if (i && !ssl3_check_client_certificate(s)) |
2949 | i = 0; | |
2950 | if (i == 0) { | |
2951 | if (s->version == SSL3_VERSION) { | |
2952 | s->s3->tmp.cert_req = 0; | |
2953 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2954 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2955 | } else { |
2956 | s->s3->tmp.cert_req = 2; | |
124037fd | 2957 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2958 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2959 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2960 | return 0; |
2961 | } | |
0f113f3e MC |
2962 | } |
2963 | } | |
2964 | ||
b9908bf9 | 2965 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2966 | } |
2967 | ||
b9908bf9 MC |
2968 | /* Shouldn't ever get here */ |
2969 | return WORK_ERROR; | |
2970 | } | |
2971 | ||
7cea05dc | 2972 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 2973 | { |
7cea05dc | 2974 | if (!ssl3_output_cert_chain(s, pkt, |
b90506e9 MC |
2975 | (s->s3->tmp.cert_req == 2) ? NULL |
2976 | : s->cert->key)) { | |
b9908bf9 MC |
2977 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
2978 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2979 | return 0; |
0f113f3e | 2980 | } |
b9908bf9 MC |
2981 | |
2982 | return 1; | |
0f113f3e MC |
2983 | } |
2984 | ||
2985 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2986 | |
36d16f8e | 2987 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 2988 | { |
60f43e9e RL |
2989 | int i; |
2990 | #ifndef OPENSSL_NO_EC | |
2991 | int idx; | |
2992 | #endif | |
0f113f3e MC |
2993 | long alg_k, alg_a; |
2994 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 2995 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2996 | |
0f113f3e MC |
2997 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2998 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 2999 | |
0f113f3e | 3000 | /* we don't have a certificate */ |
55a9a16f | 3001 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3002 | return (1); |
d02b48c6 | 3003 | |
0f113f3e | 3004 | /* This is the passed certificate */ |
d02b48c6 | 3005 | |
10bf4fc2 | 3006 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3007 | idx = s->session->peer_type; |
0f113f3e | 3008 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3009 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3010 | /* check failed */ |
3011 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3012 | goto f_err; | |
3013 | } else { | |
3014 | return 1; | |
3015 | } | |
3016 | } else if (alg_a & SSL_aECDSA) { | |
3017 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3018 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3019 | goto f_err; | |
0f113f3e MC |
3020 | } |
3021 | #endif | |
8382fd3a | 3022 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3023 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3024 | |
3025 | /* Check that we have a certificate if we require one */ | |
3026 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3027 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3028 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3029 | goto f_err; | |
3030 | } | |
bc36ee62 | 3031 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3032 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3033 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3034 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3035 | goto f_err; | |
3036 | } | |
d02b48c6 | 3037 | #endif |
bc36ee62 | 3038 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3039 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3040 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3041 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3042 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3043 | goto f_err; | |
0f113f3e | 3044 | } |
79df9d62 | 3045 | #endif |
bc36ee62 | 3046 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3047 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3048 | al = SSL_AD_INTERNAL_ERROR; |
3049 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3050 | goto f_err; |
0f113f3e | 3051 | } |
d02b48c6 RE |
3052 | #endif |
3053 | ||
0f113f3e MC |
3054 | return (1); |
3055 | f_err: | |
26c79d56 | 3056 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3057 | return (0); |
3058 | } | |
3059 | ||
e481f9b9 | 3060 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3061 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3062 | { |
15e6be6c MC |
3063 | size_t len, padding_len; |
3064 | unsigned char *padding = NULL; | |
15e6be6c | 3065 | |
b9908bf9 MC |
3066 | len = s->next_proto_negotiated_len; |
3067 | padding_len = 32 - ((len + 2) % 32); | |
15e6be6c | 3068 | |
7cea05dc MC |
3069 | if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len) |
3070 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { | |
15e6be6c MC |
3071 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3072 | goto err; | |
3073 | } | |
3074 | ||
3075 | memset(padding, 0, padding_len); | |
3076 | ||
b9908bf9 | 3077 | return 1; |
15e6be6c | 3078 | err: |
15e6be6c MC |
3079 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3080 | return 0; | |
b9908bf9 | 3081 | } |
6434abbf | 3082 | #endif |
368888bc DSH |
3083 | |
3084 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3085 | { |
3086 | int i = 0; | |
368888bc | 3087 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3088 | if (s->ctx->client_cert_engine) { |
3089 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3090 | SSL_get_client_CA_list(s), | |
3091 | px509, ppkey, NULL, NULL, NULL); | |
3092 | if (i != 0) | |
3093 | return i; | |
3094 | } | |
3095 | #endif | |
3096 | if (s->ctx->client_cert_cb) | |
3097 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3098 | return i; | |
3099 | } | |
d45ba43d | 3100 | |
ae2f7b37 | 3101 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3102 | { |
2c7b4dbc MC |
3103 | int i; |
3104 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3105 | int empty_reneg_info_scsv = !s->renegotiate; |
3106 | /* Set disabled masks for this session */ | |
3107 | ssl_set_client_disabled(s); | |
3108 | ||
3109 | if (sk == NULL) | |
3110 | return (0); | |
d45ba43d | 3111 | |
2c7b4dbc MC |
3112 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3113 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3114 | # error Max cipher length too short | |
3115 | # endif | |
3116 | /* | |
3117 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3118 | * chop number of supported ciphers to keep it well below this if we | |
3119 | * use TLS v1.2 | |
3120 | */ | |
3121 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3122 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3123 | else | |
3124 | #endif | |
3125 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3126 | maxlen = 0xfffe; | |
3127 | ||
3128 | if (empty_reneg_info_scsv) | |
3129 | maxlen -= 2; | |
3130 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3131 | maxlen -= 2; | |
3132 | ||
3133 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3134 | const SSL_CIPHER *c; | |
3135 | ||
d45ba43d MC |
3136 | c = sk_SSL_CIPHER_value(sk, i); |
3137 | /* Skip disabled ciphers */ | |
3138 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3139 | continue; | |
2c7b4dbc MC |
3140 | |
3141 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3142 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3143 | return 0; | |
3144 | } | |
3145 | ||
3146 | totlen += len; | |
d45ba43d | 3147 | } |
2c7b4dbc MC |
3148 | |
3149 | if (totlen == 0) { | |
3150 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3151 | return 0; | |
3152 | } | |
3153 | ||
3154 | if (totlen != 0) { | |
d45ba43d MC |
3155 | if (empty_reneg_info_scsv) { |
3156 | static SSL_CIPHER scsv = { | |
3157 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3158 | }; | |
2c7b4dbc MC |
3159 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3160 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3161 | return 0; | |
3162 | } | |
d45ba43d MC |
3163 | } |
3164 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3165 | static SSL_CIPHER scsv = { | |
3166 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3167 | }; | |
2c7b4dbc MC |
3168 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3169 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3170 | return 0; | |
3171 | } | |
d45ba43d MC |
3172 | } |
3173 | } | |
3174 | ||
2c7b4dbc | 3175 | return 1; |
d45ba43d | 3176 | } |