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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> | |
fc24f0bf | 51 | #include <time.h> |
8ba708e5 | 52 | #include "../ssl_locl.h" |
61ae935a | 53 | #include "statem_locl.h" |
ec577822 BM |
54 | #include <openssl/buffer.h> |
55 | #include <openssl/rand.h> | |
56 | #include <openssl/objects.h> | |
57 | #include <openssl/evp.h> | |
dbad1690 | 58 | #include <openssl/md5.h> |
3c27208f | 59 | #include <openssl/dh.h> |
d095b68d | 60 | #include <openssl/bn.h> |
3c27208f | 61 | #include <openssl/engine.h> |
f9b3bff6 | 62 | |
3847d426 | 63 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
64 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
65 | ||
7ab09630 | 66 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 67 | static int key_exchange_expected(SSL *s); |
d45ba43d | 68 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 69 | WPACKET *pkt); |
ea262260 | 70 | |
61ae935a MC |
71 | /* |
72 | * Is a CertificateRequest message allowed at the moment or not? | |
73 | * | |
74 | * Return values are: | |
75 | * 1: Yes | |
76 | * 0: No | |
77 | */ | |
7ab09630 | 78 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
79 | { |
80 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 81 | if ((s->version > SSL3_VERSION |
a230b26e EK |
82 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
83 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
84 | return 0; |
85 | ||
86 | return 1; | |
87 | } | |
88 | ||
89 | /* | |
a455d0f6 | 90 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
91 | * |
92 | * Return values are: | |
93 | * 1: Yes | |
94 | * 0: No | |
95 | */ | |
a455d0f6 | 96 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
97 | { |
98 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
99 | ||
100 | /* | |
101 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 102 | * ciphersuite or for SRP |
61ae935a | 103 | */ |
a455d0f6 MC |
104 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
105 | | SSL_kSRP)) { | |
106 | return 1; | |
61ae935a MC |
107 | } |
108 | ||
a455d0f6 | 109 | return 0; |
61ae935a MC |
110 | } |
111 | ||
0f1e51ea MC |
112 | /* |
113 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
114 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
115 | * server. The message type that the server has sent is provided in |mt|. The | |
116 | * current state is in |s->statem.hand_state|. | |
117 | * | |
94ed2c67 MC |
118 | * Return values are 1 for success (transition allowed) and 0 on error |
119 | * (transition not allowed) | |
0f1e51ea MC |
120 | */ |
121 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
122 | { | |
123 | OSSL_STATEM *st = &s->statem; | |
124 | ||
125 | /* | |
126 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
127 | * yet negotiated TLSv1.3 at that point so that is handled by | |
128 | * ossl_statem_client_read_transition() | |
129 | */ | |
130 | ||
131 | switch (st->hand_state) { | |
132 | default: | |
133 | break; | |
134 | ||
3847d426 MC |
135 | case TLS_ST_CW_CLNT_HELLO: |
136 | /* | |
137 | * This must a ClientHello following a HelloRetryRequest, so the only | |
138 | * thing we can get now is a ServerHello. | |
139 | */ | |
140 | if (mt == SSL3_MT_SERVER_HELLO) { | |
141 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
142 | return 1; | |
143 | } | |
144 | break; | |
145 | ||
0f1e51ea | 146 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
147 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
148 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
149 | return 1; | |
150 | } | |
151 | break; | |
152 | ||
153 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 154 | if (s->hit) { |
92760c21 MC |
155 | if (mt == SSL3_MT_FINISHED) { |
156 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
157 | return 1; |
158 | } | |
159 | } else { | |
92760c21 MC |
160 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
161 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
162 | return 1; | |
f5ca0b04 MC |
163 | } |
164 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
165 | st->hand_state = TLS_ST_CR_CERT; |
166 | return 1; | |
167 | } | |
168 | } | |
169 | break; | |
170 | ||
92760c21 MC |
171 | case TLS_ST_CR_CERT_REQ: |
172 | if (mt == SSL3_MT_CERTIFICATE) { | |
173 | st->hand_state = TLS_ST_CR_CERT; | |
174 | return 1; | |
175 | } | |
176 | break; | |
177 | ||
0f1e51ea | 178 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
179 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
180 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
181 | return 1; | |
182 | } | |
183 | break; | |
184 | ||
185 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
186 | if (mt == SSL3_MT_FINISHED) { |
187 | st->hand_state = TLS_ST_CR_FINISHED; | |
188 | return 1; | |
189 | } | |
190 | break; | |
cc2455bf MC |
191 | |
192 | case TLS_ST_OK: | |
193 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
194 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
195 | return 1; | |
196 | } | |
e1c3de44 MC |
197 | if (mt == SSL3_MT_KEY_UPDATE) { |
198 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
199 | return 1; | |
200 | } | |
cc2455bf | 201 | break; |
0f1e51ea MC |
202 | } |
203 | ||
0f1e51ea | 204 | /* No valid transition found */ |
0f1e51ea MC |
205 | return 0; |
206 | } | |
207 | ||
61ae935a | 208 | /* |
8481f583 MC |
209 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
210 | * handshake state transitions when the client is reading messages from the | |
211 | * server. The message type that the server has sent is provided in |mt|. The | |
212 | * current state is in |s->statem.hand_state|. | |
61ae935a | 213 | * |
94ed2c67 MC |
214 | * Return values are 1 for success (transition allowed) and 0 on error |
215 | * (transition not allowed) | |
61ae935a | 216 | */ |
8481f583 | 217 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 218 | { |
d6f1a6e9 | 219 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 220 | int ske_expected; |
61ae935a | 221 | |
0f1e51ea | 222 | /* |
3847d426 MC |
223 | * Note that after writing the first ClientHello we don't know what version |
224 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 225 | */ |
f5ca0b04 | 226 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
227 | if (!ossl_statem_client13_read_transition(s, mt)) |
228 | goto err; | |
229 | return 1; | |
230 | } | |
0f1e51ea | 231 | |
a230b26e | 232 | switch (st->hand_state) { |
f3b3d7f0 RS |
233 | default: |
234 | break; | |
235 | ||
61ae935a MC |
236 | case TLS_ST_CW_CLNT_HELLO: |
237 | if (mt == SSL3_MT_SERVER_HELLO) { | |
238 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
239 | return 1; | |
240 | } | |
241 | ||
242 | if (SSL_IS_DTLS(s)) { | |
243 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
244 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
245 | return 1; | |
246 | } | |
3847d426 MC |
247 | } else { |
248 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
249 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
250 | return 1; | |
251 | } | |
61ae935a MC |
252 | } |
253 | break; | |
254 | ||
d7f8783f | 255 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
256 | /* |
257 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
258 | * data. The only thing allowed now is a ServerHello or a | |
259 | * HelloRetryRequest. | |
260 | */ | |
261 | if (mt == SSL3_MT_SERVER_HELLO) { | |
262 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
263 | return 1; | |
264 | } | |
265 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
266 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
267 | return 1; | |
268 | } | |
269 | break; | |
270 | ||
61ae935a MC |
271 | case TLS_ST_CR_SRVR_HELLO: |
272 | if (s->hit) { | |
aff8c126 | 273 | if (s->ext.ticket_expected) { |
61ae935a MC |
274 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
275 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
276 | return 1; | |
277 | } | |
278 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
279 | st->hand_state = TLS_ST_CR_CHANGE; | |
280 | return 1; | |
281 | } | |
282 | } else { | |
283 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
284 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
285 | return 1; | |
ad3819c2 | 286 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
287 | && s->ext.session_secret_cb != NULL |
288 | && s->session->ext.tick != NULL | |
a230b26e | 289 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
290 | /* |
291 | * Normally, we can tell if the server is resuming the session | |
292 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
293 | * the next server message after the ServerHello to determine if | |
294 | * the server is resuming. | |
295 | */ | |
296 | s->hit = 1; | |
297 | st->hand_state = TLS_ST_CR_CHANGE; | |
298 | return 1; | |
61ae935a | 299 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 300 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
301 | if (mt == SSL3_MT_CERTIFICATE) { |
302 | st->hand_state = TLS_ST_CR_CERT; | |
303 | return 1; | |
304 | } | |
305 | } else { | |
a455d0f6 | 306 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
307 | /* SKE is optional for some PSK ciphersuites */ |
308 | if (ske_expected | |
a230b26e EK |
309 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
310 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
311 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
312 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
313 | return 1; | |
314 | } | |
315 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
316 | && cert_req_allowed(s)) { |
317 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
318 | return 1; | |
a455d0f6 | 319 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
320 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
321 | return 1; | |
61ae935a MC |
322 | } |
323 | } | |
324 | } | |
325 | break; | |
326 | ||
327 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
328 | /* |
329 | * The CertificateStatus message is optional even if | |
aff8c126 | 330 | * |ext.status_expected| is set |
bb1aaab4 | 331 | */ |
aff8c126 | 332 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
333 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
334 | return 1; | |
a455d0f6 MC |
335 | } |
336 | /* Fall through */ | |
337 | ||
338 | case TLS_ST_CR_CERT_STATUS: | |
339 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 340 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
341 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
342 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
343 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
344 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
345 | return 1; | |
61ae935a | 346 | } |
672f3337 | 347 | goto err; |
61ae935a | 348 | } |
a455d0f6 | 349 | /* Fall through */ |
61ae935a | 350 | |
a455d0f6 MC |
351 | case TLS_ST_CR_KEY_EXCH: |
352 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
353 | if (cert_req_allowed(s)) { | |
61ae935a MC |
354 | st->hand_state = TLS_ST_CR_CERT_REQ; |
355 | return 1; | |
61ae935a | 356 | } |
672f3337 | 357 | goto err; |
61ae935a | 358 | } |
a455d0f6 | 359 | /* Fall through */ |
61ae935a MC |
360 | |
361 | case TLS_ST_CR_CERT_REQ: | |
362 | if (mt == SSL3_MT_SERVER_DONE) { | |
363 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
364 | return 1; | |
365 | } | |
366 | break; | |
367 | ||
368 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 369 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
370 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
371 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
372 | return 1; | |
373 | } | |
61ae935a MC |
374 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
375 | st->hand_state = TLS_ST_CR_CHANGE; | |
376 | return 1; | |
377 | } | |
378 | break; | |
379 | ||
380 | case TLS_ST_CR_SESSION_TICKET: | |
381 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
382 | st->hand_state = TLS_ST_CR_CHANGE; | |
383 | return 1; | |
384 | } | |
385 | break; | |
386 | ||
387 | case TLS_ST_CR_CHANGE: | |
388 | if (mt == SSL3_MT_FINISHED) { | |
389 | st->hand_state = TLS_ST_CR_FINISHED; | |
390 | return 1; | |
391 | } | |
392 | break; | |
c7f47786 MC |
393 | |
394 | case TLS_ST_OK: | |
4004ce5f | 395 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
396 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
397 | return 1; | |
398 | } | |
399 | break; | |
61ae935a MC |
400 | } |
401 | ||
672f3337 | 402 | err: |
61ae935a | 403 | /* No valid transition found */ |
672f3337 | 404 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 405 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
406 | return 0; |
407 | } | |
408 | ||
409 | /* | |
0f1e51ea MC |
410 | * ossl_statem_client13_write_transition() works out what handshake state to |
411 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
412 | * server. | |
0f1e51ea MC |
413 | */ |
414 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
415 | { | |
416 | OSSL_STATEM *st = &s->statem; | |
417 | ||
418 | /* | |
3847d426 MC |
419 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
420 | * TLSv1.3 yet at that point. They are handled by | |
421 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
422 | */ |
423 | switch (st->hand_state) { | |
424 | default: | |
425 | /* Shouldn't happen */ | |
426 | return WRITE_TRAN_ERROR; | |
427 | ||
3847d426 MC |
428 | case TLS_ST_CW_CLNT_HELLO: |
429 | /* We only hit this in the case of HelloRetryRequest */ | |
430 | return WRITE_TRAN_FINISHED; | |
431 | ||
432 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
433 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
434 | return WRITE_TRAN_CONTINUE; | |
435 | ||
92760c21 | 436 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
437 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
438 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 439 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
564547e4 MC |
440 | else |
441 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT | |
442 | : TLS_ST_CW_FINISHED; | |
443 | return WRITE_TRAN_CONTINUE; | |
444 | ||
d7f8783f | 445 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
446 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
447 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
448 | return WRITE_TRAN_CONTINUE; | |
449 | } | |
450 | /* Fall through */ | |
451 | ||
452 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
94ed2c67 | 453 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 454 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
455 | return WRITE_TRAN_CONTINUE; |
456 | ||
457 | case TLS_ST_CW_CERT: | |
458 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 459 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 460 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
461 | return WRITE_TRAN_CONTINUE; |
462 | ||
463 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
464 | st->hand_state = TLS_ST_CW_FINISHED; |
465 | return WRITE_TRAN_CONTINUE; | |
466 | ||
e1c3de44 | 467 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
468 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
469 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
470 | return WRITE_TRAN_CONTINUE; | |
471 | } | |
472 | /* Fall through */ | |
473 | ||
9412b3ad | 474 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 475 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 476 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 477 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 478 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
479 | |
480 | case TLS_ST_OK: | |
9412b3ad MC |
481 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
482 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
483 | return WRITE_TRAN_CONTINUE; | |
484 | } | |
485 | ||
486 | /* Try to read from the server instead */ | |
cc2455bf | 487 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
488 | } |
489 | } | |
490 | ||
491 | /* | |
492 | * ossl_statem_client_write_transition() works out what handshake state to | |
493 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 494 | */ |
8481f583 | 495 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 496 | { |
d6f1a6e9 | 497 | OSSL_STATEM *st = &s->statem; |
61ae935a | 498 | |
0f1e51ea MC |
499 | /* |
500 | * Note that immediately before/after a ClientHello we don't know what | |
501 | * version we are going to negotiate yet, so we don't take this branch until | |
502 | * later | |
503 | */ | |
f5ca0b04 | 504 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
505 | return ossl_statem_client13_write_transition(s); |
506 | ||
a230b26e | 507 | switch (st->hand_state) { |
f3b3d7f0 RS |
508 | default: |
509 | /* Shouldn't happen */ | |
510 | return WRITE_TRAN_ERROR; | |
511 | ||
a230b26e | 512 | case TLS_ST_OK: |
c7f47786 MC |
513 | if (!s->renegotiate) { |
514 | /* | |
515 | * We haven't requested a renegotiation ourselves so we must have | |
516 | * received a message from the server. Better read it. | |
517 | */ | |
518 | return WRITE_TRAN_FINISHED; | |
519 | } | |
a230b26e EK |
520 | /* Renegotiation - fall through */ |
521 | case TLS_ST_BEFORE: | |
522 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
523 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 524 | |
a230b26e | 525 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
526 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
527 | /* | |
528 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
529 | * actually selected a version yet. | |
530 | */ | |
d7f8783f | 531 | st->hand_state = TLS_ST_EARLY_DATA; |
49e7fe12 MC |
532 | return WRITE_TRAN_CONTINUE; |
533 | } | |
a230b26e EK |
534 | /* |
535 | * No transition at the end of writing because we don't know what | |
536 | * we will be sent | |
537 | */ | |
538 | return WRITE_TRAN_FINISHED; | |
61ae935a | 539 | |
d7f8783f | 540 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
541 | return WRITE_TRAN_FINISHED; |
542 | ||
a230b26e EK |
543 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
544 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
545 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 546 | |
a230b26e EK |
547 | case TLS_ST_CR_SRVR_DONE: |
548 | if (s->s3->tmp.cert_req) | |
549 | st->hand_state = TLS_ST_CW_CERT; | |
550 | else | |
61ae935a | 551 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 552 | return WRITE_TRAN_CONTINUE; |
61ae935a | 553 | |
a230b26e EK |
554 | case TLS_ST_CW_CERT: |
555 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
556 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 557 | |
a230b26e EK |
558 | case TLS_ST_CW_KEY_EXCH: |
559 | /* | |
560 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
561 | * sent, but no verify packet is sent | |
562 | */ | |
563 | /* | |
564 | * XXX: For now, we do not support client authentication in ECDH | |
565 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
566 | * need to skip the certificate verify message when client's | |
567 | * ECDH public key is sent inside the client certificate. | |
568 | */ | |
569 | if (s->s3->tmp.cert_req == 1) { | |
570 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
571 | } else { | |
61ae935a | 572 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
573 | } |
574 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
575 | st->hand_state = TLS_ST_CW_CHANGE; | |
576 | } | |
577 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 578 | |
a230b26e EK |
579 | case TLS_ST_CW_CERT_VRFY: |
580 | st->hand_state = TLS_ST_CW_CHANGE; | |
581 | return WRITE_TRAN_CONTINUE; | |
582 | ||
583 | case TLS_ST_CW_CHANGE: | |
61ae935a | 584 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
4004ce5f MC |
585 | st-> |
586 | hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 587 | #else |
aff8c126 | 588 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
589 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
590 | else | |
591 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 592 | #endif |
a230b26e | 593 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
594 | |
595 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
596 | case TLS_ST_CW_NEXT_PROTO: |
597 | st->hand_state = TLS_ST_CW_FINISHED; | |
598 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
599 | #endif |
600 | ||
a230b26e EK |
601 | case TLS_ST_CW_FINISHED: |
602 | if (s->hit) { | |
603 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
604 | return WRITE_TRAN_CONTINUE; |
605 | } else { | |
606 | return WRITE_TRAN_FINISHED; | |
607 | } | |
61ae935a | 608 | |
a230b26e EK |
609 | case TLS_ST_CR_FINISHED: |
610 | if (s->hit) { | |
611 | st->hand_state = TLS_ST_CW_CHANGE; | |
612 | return WRITE_TRAN_CONTINUE; | |
613 | } else { | |
614 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
615 | return WRITE_TRAN_CONTINUE; |
616 | } | |
c7f47786 MC |
617 | |
618 | case TLS_ST_CR_HELLO_REQ: | |
619 | /* | |
620 | * If we can renegotiate now then do so, otherwise wait for a more | |
621 | * convenient time. | |
622 | */ | |
623 | if (ssl3_renegotiate_check(s, 1)) { | |
624 | if (!tls_setup_handshake(s)) { | |
625 | ossl_statem_set_error(s); | |
626 | return WRITE_TRAN_ERROR; | |
627 | } | |
628 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
629 | return WRITE_TRAN_CONTINUE; | |
630 | } | |
631 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 632 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
633 | } |
634 | } | |
635 | ||
636 | /* | |
637 | * Perform any pre work that needs to be done prior to sending a message from | |
638 | * the client to the server. | |
639 | */ | |
8481f583 | 640 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 641 | { |
d6f1a6e9 | 642 | OSSL_STATEM *st = &s->statem; |
61ae935a | 643 | |
a230b26e | 644 | switch (st->hand_state) { |
f3b3d7f0 RS |
645 | default: |
646 | /* No pre work to be done */ | |
647 | break; | |
648 | ||
61ae935a MC |
649 | case TLS_ST_CW_CLNT_HELLO: |
650 | s->shutdown = 0; | |
651 | if (SSL_IS_DTLS(s)) { | |
652 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
653 | if (!ssl3_init_finished_mac(s)) { |
654 | ossl_statem_set_error(s); | |
655 | return WORK_ERROR; | |
656 | } | |
61ae935a MC |
657 | } |
658 | break; | |
659 | ||
61ae935a MC |
660 | case TLS_ST_CW_CHANGE: |
661 | if (SSL_IS_DTLS(s)) { | |
662 | if (s->hit) { | |
663 | /* | |
664 | * We're into the last flight so we don't retransmit these | |
665 | * messages unless we need to. | |
666 | */ | |
667 | st->use_timer = 0; | |
668 | } | |
669 | #ifndef OPENSSL_NO_SCTP | |
670 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
671 | return dtls_wait_for_dry(s); | |
672 | #endif | |
673 | } | |
f3b3d7f0 | 674 | break; |
61ae935a | 675 | |
d7f8783f | 676 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
677 | /* |
678 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
679 | * attempt to write early data before calling SSL_read() then we press | |
680 | * on with the handshake. Otherwise we pause here. | |
681 | */ | |
682 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
683 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
684 | return WORK_FINISHED_CONTINUE; | |
685 | /* Fall through */ | |
686 | ||
687 | case TLS_ST_EARLY_DATA: | |
61ae935a | 688 | case TLS_ST_OK: |
30f05b19 | 689 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
690 | } |
691 | ||
692 | return WORK_FINISHED_CONTINUE; | |
693 | } | |
694 | ||
695 | /* | |
696 | * Perform any work that needs to be done after sending a message from the | |
697 | * client to the server. | |
698 | */ | |
8481f583 | 699 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 700 | { |
d6f1a6e9 | 701 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
702 | |
703 | s->init_num = 0; | |
704 | ||
a230b26e | 705 | switch (st->hand_state) { |
f3b3d7f0 RS |
706 | default: |
707 | /* No post work to be done */ | |
708 | break; | |
709 | ||
61ae935a | 710 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 711 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 712 | return WORK_MORE_A; |
46417569 | 713 | |
61ae935a MC |
714 | if (SSL_IS_DTLS(s)) { |
715 | /* Treat the next message as the first packet */ | |
716 | s->first_packet = 1; | |
717 | } | |
6cb42265 MC |
718 | |
719 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
720 | && s->max_early_data > 0) { | |
721 | /* | |
722 | * We haven't selected TLSv1.3 yet so we don't call the change | |
723 | * cipher state function associated with the SSL_METHOD. Instead | |
724 | * we call tls13_change_cipher_state() directly. | |
725 | */ | |
726 | if (!tls13_change_cipher_state(s, | |
727 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
1ea4d09a | 728 | return WORK_ERROR; |
6cb42265 | 729 | } |
61ae935a MC |
730 | break; |
731 | ||
ef6c191b MC |
732 | case TLS_ST_CW_END_OF_EARLY_DATA: |
733 | /* | |
734 | * We set the enc_write_ctx back to NULL because we may end up writing | |
735 | * in cleartext again if we get a HelloRetryRequest from the server. | |
736 | */ | |
737 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
738 | s->enc_write_ctx = NULL; | |
739 | break; | |
740 | ||
61ae935a MC |
741 | case TLS_ST_CW_KEY_EXCH: |
742 | if (tls_client_key_exchange_post_work(s) == 0) | |
743 | return WORK_ERROR; | |
744 | break; | |
745 | ||
746 | case TLS_ST_CW_CHANGE: | |
747 | s->session->cipher = s->s3->tmp.new_cipher; | |
748 | #ifdef OPENSSL_NO_COMP | |
749 | s->session->compress_meth = 0; | |
750 | #else | |
751 | if (s->s3->tmp.new_compression == NULL) | |
752 | s->session->compress_meth = 0; | |
753 | else | |
754 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
755 | #endif | |
756 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
757 | return WORK_ERROR; | |
758 | ||
759 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
760 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
761 | return WORK_ERROR; | |
762 | ||
763 | if (SSL_IS_DTLS(s)) { | |
764 | #ifndef OPENSSL_NO_SCTP | |
765 | if (s->hit) { | |
766 | /* | |
767 | * Change to new shared key of SCTP-Auth, will be ignored if | |
768 | * no SCTP used. | |
769 | */ | |
770 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
771 | 0, NULL); | |
772 | } | |
773 | #endif | |
774 | ||
775 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
776 | } | |
777 | break; | |
778 | ||
779 | case TLS_ST_CW_FINISHED: | |
780 | #ifndef OPENSSL_NO_SCTP | |
781 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
782 | /* | |
783 | * Change to new shared key of SCTP-Auth, will be ignored if | |
784 | * no SCTP used. | |
785 | */ | |
786 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
787 | 0, NULL); | |
788 | } | |
789 | #endif | |
790 | if (statem_flush(s) != 1) | |
791 | return WORK_MORE_B; | |
92760c21 MC |
792 | |
793 | if (SSL_IS_TLS13(s)) { | |
794 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
795 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
796 | return WORK_ERROR; | |
797 | } | |
61ae935a | 798 | break; |
9412b3ad MC |
799 | |
800 | case TLS_ST_CW_KEY_UPDATE: | |
801 | if (statem_flush(s) != 1) | |
802 | return WORK_MORE_A; | |
57389a32 MC |
803 | if (!tls13_update_key(s, 1)) |
804 | return WORK_ERROR; | |
9412b3ad | 805 | break; |
61ae935a MC |
806 | } |
807 | ||
808 | return WORK_FINISHED_CONTINUE; | |
809 | } | |
810 | ||
811 | /* | |
6392fb8e MC |
812 | * Get the message construction function and message type for sending from the |
813 | * client | |
61ae935a MC |
814 | * |
815 | * Valid return values are: | |
816 | * 1: Success | |
817 | * 0: Error | |
818 | */ | |
6392fb8e | 819 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 820 | confunc_f *confunc, int *mt) |
61ae935a | 821 | { |
d6f1a6e9 | 822 | OSSL_STATEM *st = &s->statem; |
61ae935a | 823 | |
4a01c59f MC |
824 | switch (st->hand_state) { |
825 | default: | |
826 | /* Shouldn't happen */ | |
827 | return 0; | |
828 | ||
829 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 830 | if (SSL_IS_DTLS(s)) |
6392fb8e | 831 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 832 | else |
6392fb8e MC |
833 | *confunc = tls_construct_change_cipher_spec; |
834 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
835 | break; |
836 | ||
837 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
838 | *confunc = tls_construct_client_hello; |
839 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
840 | break; |
841 | ||
ef6c191b MC |
842 | case TLS_ST_CW_END_OF_EARLY_DATA: |
843 | *confunc = tls_construct_end_of_early_data; | |
844 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
845 | break; | |
846 | ||
847 | case TLS_ST_PENDING_EARLY_DATA_END: | |
848 | *confunc = NULL; | |
849 | *mt = SSL3_MT_DUMMY; | |
850 | break; | |
851 | ||
4a01c59f | 852 | case TLS_ST_CW_CERT: |
6392fb8e MC |
853 | *confunc = tls_construct_client_certificate; |
854 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
855 | break; |
856 | ||
857 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
858 | *confunc = tls_construct_client_key_exchange; |
859 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
860 | break; |
861 | ||
862 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 863 | *confunc = tls_construct_cert_verify; |
6392fb8e | 864 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 865 | break; |
61ae935a MC |
866 | |
867 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 868 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
869 | *confunc = tls_construct_next_proto; |
870 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 871 | break; |
61ae935a | 872 | #endif |
4a01c59f | 873 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
874 | *confunc = tls_construct_finished; |
875 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 876 | break; |
9412b3ad MC |
877 | |
878 | case TLS_ST_CW_KEY_UPDATE: | |
879 | *confunc = tls_construct_key_update; | |
880 | *mt = SSL3_MT_KEY_UPDATE; | |
881 | break; | |
4a01c59f | 882 | } |
5923ad4b | 883 | |
5923ad4b | 884 | return 1; |
61ae935a MC |
885 | } |
886 | ||
887 | /* | |
888 | * Returns the maximum allowed length for the current message that we are | |
889 | * reading. Excludes the message header. | |
890 | */ | |
eda75751 | 891 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 892 | { |
d6f1a6e9 | 893 | OSSL_STATEM *st = &s->statem; |
61ae935a | 894 | |
a230b26e | 895 | switch (st->hand_state) { |
f3b3d7f0 RS |
896 | default: |
897 | /* Shouldn't happen */ | |
898 | return 0; | |
899 | ||
a230b26e EK |
900 | case TLS_ST_CR_SRVR_HELLO: |
901 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 902 | |
a230b26e EK |
903 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
904 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 905 | |
3847d426 MC |
906 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
907 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
908 | ||
a230b26e EK |
909 | case TLS_ST_CR_CERT: |
910 | return s->max_cert_list; | |
61ae935a | 911 | |
2c5dfdc3 MC |
912 | case TLS_ST_CR_CERT_VRFY: |
913 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
914 | ||
a230b26e EK |
915 | case TLS_ST_CR_CERT_STATUS: |
916 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 917 | |
a230b26e EK |
918 | case TLS_ST_CR_KEY_EXCH: |
919 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 920 | |
a230b26e EK |
921 | case TLS_ST_CR_CERT_REQ: |
922 | /* | |
923 | * Set to s->max_cert_list for compatibility with previous releases. In | |
924 | * practice these messages can get quite long if servers are configured | |
925 | * to provide a long list of acceptable CAs | |
926 | */ | |
927 | return s->max_cert_list; | |
61ae935a | 928 | |
a230b26e EK |
929 | case TLS_ST_CR_SRVR_DONE: |
930 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 931 | |
a230b26e EK |
932 | case TLS_ST_CR_CHANGE: |
933 | if (s->version == DTLS1_BAD_VER) | |
934 | return 3; | |
935 | return CCS_MAX_LENGTH; | |
61ae935a | 936 | |
a230b26e EK |
937 | case TLS_ST_CR_SESSION_TICKET: |
938 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 939 | |
a230b26e EK |
940 | case TLS_ST_CR_FINISHED: |
941 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
942 | |
943 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
944 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
945 | |
946 | case TLS_ST_CR_KEY_UPDATE: | |
947 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 948 | } |
61ae935a MC |
949 | } |
950 | ||
951 | /* | |
952 | * Process a message that the client has been received from the server. | |
953 | */ | |
8481f583 | 954 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 955 | { |
d6f1a6e9 | 956 | OSSL_STATEM *st = &s->statem; |
61ae935a | 957 | |
a230b26e | 958 | switch (st->hand_state) { |
f3b3d7f0 RS |
959 | default: |
960 | /* Shouldn't happen */ | |
961 | return MSG_PROCESS_ERROR; | |
962 | ||
a230b26e EK |
963 | case TLS_ST_CR_SRVR_HELLO: |
964 | return tls_process_server_hello(s, pkt); | |
61ae935a | 965 | |
a230b26e EK |
966 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
967 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 968 | |
3847d426 MC |
969 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
970 | return tls_process_hello_retry_request(s, pkt); | |
971 | ||
a230b26e EK |
972 | case TLS_ST_CR_CERT: |
973 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 974 | |
2c5dfdc3 MC |
975 | case TLS_ST_CR_CERT_VRFY: |
976 | return tls_process_cert_verify(s, pkt); | |
977 | ||
a230b26e EK |
978 | case TLS_ST_CR_CERT_STATUS: |
979 | return tls_process_cert_status(s, pkt); | |
61ae935a | 980 | |
a230b26e EK |
981 | case TLS_ST_CR_KEY_EXCH: |
982 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 983 | |
a230b26e EK |
984 | case TLS_ST_CR_CERT_REQ: |
985 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 986 | |
a230b26e EK |
987 | case TLS_ST_CR_SRVR_DONE: |
988 | return tls_process_server_done(s, pkt); | |
61ae935a | 989 | |
a230b26e EK |
990 | case TLS_ST_CR_CHANGE: |
991 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 992 | |
a230b26e EK |
993 | case TLS_ST_CR_SESSION_TICKET: |
994 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 995 | |
a230b26e EK |
996 | case TLS_ST_CR_FINISHED: |
997 | return tls_process_finished(s, pkt); | |
e46f2334 | 998 | |
c7f47786 MC |
999 | case TLS_ST_CR_HELLO_REQ: |
1000 | return tls_process_hello_req(s, pkt); | |
1001 | ||
e46f2334 MC |
1002 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1003 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1004 | |
1005 | case TLS_ST_CR_KEY_UPDATE: | |
1006 | return tls_process_key_update(s, pkt); | |
61ae935a | 1007 | } |
61ae935a MC |
1008 | } |
1009 | ||
1010 | /* | |
1011 | * Perform any further processing required following the receipt of a message | |
1012 | * from the server | |
1013 | */ | |
8481f583 | 1014 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1015 | { |
d6f1a6e9 | 1016 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1017 | |
a230b26e | 1018 | switch (st->hand_state) { |
f3b3d7f0 RS |
1019 | default: |
1020 | /* Shouldn't happen */ | |
1021 | return WORK_ERROR; | |
1022 | ||
05c4f1d5 MC |
1023 | case TLS_ST_CR_CERT_REQ: |
1024 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1025 | } |
61ae935a MC |
1026 | } |
1027 | ||
7cea05dc | 1028 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1029 | { |
2c7b4dbc | 1030 | unsigned char *p; |
ec60ccc1 MC |
1031 | size_t sess_id_len; |
1032 | int i, protverr; | |
2c7b4dbc | 1033 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 1034 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1035 | SSL_COMP *comp; |
1036 | #endif | |
b9908bf9 | 1037 | SSL_SESSION *sess = s->session; |
0f113f3e | 1038 | |
7cea05dc | 1039 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1040 | /* Should not happen */ |
1041 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1042 | return 0; |
2c7b4dbc | 1043 | } |
0f113f3e | 1044 | |
b9908bf9 | 1045 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1046 | protverr = ssl_set_client_hello_version(s); |
1047 | if (protverr != 0) { | |
1048 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1049 | return 0; |
4fa52141 | 1050 | } |
0f113f3e | 1051 | |
a230b26e | 1052 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 1053 | /* |
b9908bf9 MC |
1054 | * In the case of EAP-FAST, we can have a pre-shared |
1055 | * "ticket" without a session ID. | |
0f113f3e | 1056 | */ |
aff8c126 | 1057 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
1058 | (sess->not_resumable)) { |
1059 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1060 | return 0; |
b9908bf9 MC |
1061 | } |
1062 | /* else use the pre-loaded session */ | |
0f113f3e | 1063 | |
b9908bf9 | 1064 | p = s->s3->client_random; |
0f113f3e | 1065 | |
b9908bf9 MC |
1066 | /* |
1067 | * for DTLS if client_random is initialized, reuse it, we are | |
1068 | * required to use same upon reply to HelloVerify | |
1069 | */ | |
1070 | if (SSL_IS_DTLS(s)) { | |
1071 | size_t idx; | |
1072 | i = 1; | |
1073 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1074 | if (p[idx]) { | |
1075 | i = 0; | |
1076 | break; | |
0f113f3e | 1077 | } |
0f113f3e | 1078 | } |
b9908bf9 MC |
1079 | } else |
1080 | i = 1; | |
0f113f3e | 1081 | |
f7f2a01d MC |
1082 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
1083 | DOWNGRADE_NONE) <= 0) | |
7cea05dc | 1084 | return 0; |
b9908bf9 | 1085 | |
b9908bf9 MC |
1086 | /*- |
1087 | * version indicates the negotiated version: for example from | |
1088 | * an SSLv2/v3 compatible client hello). The client_version | |
1089 | * field is the maximum version we permit and it is also | |
1090 | * used in RSA encrypted premaster secrets. Some servers can | |
1091 | * choke if we initially report a higher version then | |
1092 | * renegotiate to a lower one in the premaster secret. This | |
1093 | * didn't happen with TLS 1.0 as most servers supported it | |
1094 | * but it can with TLS 1.1 or later if the server only supports | |
1095 | * 1.0. | |
1096 | * | |
1097 | * Possible scenario with previous logic: | |
1098 | * 1. Client hello indicates TLS 1.2 | |
1099 | * 2. Server hello says TLS 1.0 | |
1100 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1101 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1102 | * 5. Server sends hello request to renegotiate. |
1103 | * 6. Client hello indicates TLS v1.0 as we now | |
1104 | * know that is maximum server supports. | |
1105 | * 7. Server chokes on RSA encrypted premaster secret | |
1106 | * containing version 1.0. | |
1107 | * | |
1108 | * For interoperability it should be OK to always use the | |
1109 | * maximum version we support in client hello and then rely | |
1110 | * on the checking of version to ensure the servers isn't | |
1111 | * being inconsistent: for example initially negotiating with | |
1112 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1113 | * client_version in client hello and not resetting it to | |
1114 | * the negotiated version. | |
cd998837 MC |
1115 | * |
1116 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1117 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1118 | */ |
7acb8b64 | 1119 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1120 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1121 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1122 | return 0; |
2c7b4dbc | 1123 | } |
b9908bf9 MC |
1124 | |
1125 | /* Session ID */ | |
f05bcf0f | 1126 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1127 | sess_id_len = 0; |
b9908bf9 | 1128 | else |
ec60ccc1 MC |
1129 | sess_id_len = s->session->session_id_length; |
1130 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1131 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1132 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1133 | sess_id_len)) | |
7cea05dc | 1134 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1135 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1136 | return 0; |
b9908bf9 | 1137 | } |
0f113f3e | 1138 | |
b9908bf9 MC |
1139 | /* cookie stuff for DTLS */ |
1140 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1141 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1142 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1143 | s->d1->cookie_len)) { |
b9908bf9 | 1144 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1145 | return 0; |
0f113f3e | 1146 | } |
b9908bf9 MC |
1147 | } |
1148 | ||
1149 | /* Ciphers supported */ | |
7cea05dc | 1150 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1151 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1152 | return 0; |
2c7b4dbc MC |
1153 | } |
1154 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1155 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1156 | return 0; | |
1157 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1158 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1159 | return 0; |
b9908bf9 | 1160 | } |
0f113f3e | 1161 | |
b9908bf9 | 1162 | /* COMPRESSION */ |
7cea05dc | 1163 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1164 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1165 | return 0; |
2c7b4dbc MC |
1166 | } |
1167 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1168 | if (ssl_allow_compression(s) |
1169 | && s->ctx->comp_methods | |
1170 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1171 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1172 | for (i = 0; i < compnum; i++) { | |
1173 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1174 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1175 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1176 | return 0; |
2c7b4dbc MC |
1177 | } |
1178 | } | |
b9908bf9 | 1179 | } |
09b6c2ef | 1180 | #endif |
2c7b4dbc | 1181 | /* Add the NULL method */ |
7cea05dc | 1182 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1183 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1184 | return 0; |
2c7b4dbc | 1185 | } |
761772d7 | 1186 | |
b9908bf9 | 1187 | /* TLS extensions */ |
fe874d27 | 1188 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1189 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1190 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1191 | return 0; |
b9908bf9 | 1192 | } |
0f113f3e | 1193 | |
b9908bf9 | 1194 | return 1; |
0f113f3e | 1195 | } |
d02b48c6 | 1196 | |
be3583fa | 1197 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1198 | { |
1199 | int al; | |
cb150cbc | 1200 | size_t cookie_len; |
8ba708e5 MC |
1201 | PACKET cookiepkt; |
1202 | ||
1203 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1204 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1205 | al = SSL_AD_DECODE_ERROR; |
1206 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1207 | goto f_err; | |
1208 | } | |
1209 | ||
1210 | cookie_len = PACKET_remaining(&cookiepkt); | |
1211 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1212 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1213 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1214 | goto f_err; | |
1215 | } | |
1216 | ||
1217 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1218 | al = SSL_AD_DECODE_ERROR; | |
1219 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1220 | goto f_err; | |
1221 | } | |
1222 | s->d1->cookie_len = cookie_len; | |
1223 | ||
1224 | return MSG_PROCESS_FINISHED_READING; | |
1225 | f_err: | |
1226 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1227 | ossl_statem_set_error(s); |
8ba708e5 MC |
1228 | return MSG_PROCESS_ERROR; |
1229 | } | |
1230 | ||
11c67eea | 1231 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1232 | { |
1233 | STACK_OF(SSL_CIPHER) *sk; | |
1234 | const SSL_CIPHER *c; | |
11c67eea MC |
1235 | int i; |
1236 | ||
1237 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1238 | if (c == NULL) { | |
1239 | /* unknown cipher */ | |
1240 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_UNKNOWN_CIPHER_RETURNED); | |
1241 | return 0; | |
1242 | } | |
1243 | /* | |
1244 | * If it is a disabled cipher we either didn't send it in client hello, | |
1245 | * or it's not allowed for the selected protocol. So we return an error. | |
1246 | */ | |
8af91fd9 | 1247 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
11c67eea MC |
1248 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | sk = ssl_get_ciphers_by_id(s); | |
1253 | i = sk_SSL_CIPHER_find(sk, c); | |
1254 | if (i < 0) { | |
1255 | /* we did not say we would use this cipher */ | |
1256 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1257 | return 0; | |
1258 | } | |
1259 | ||
1260 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1261 | && s->s3->tmp.new_cipher->id != c->id) { | |
1262 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
1263 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * Depending on the session caching (internal/external), the cipher | |
1269 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1270 | * set and use it for comparison. | |
1271 | */ | |
1272 | if (s->session->cipher != NULL) | |
1273 | s->session->cipher_id = s->session->cipher->id; | |
1274 | if (s->hit && (s->session->cipher_id != c->id)) { | |
1275 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, | |
1276 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
1277 | return 0; | |
1278 | } | |
1279 | s->s3->tmp.new_cipher = c; | |
1280 | ||
1281 | return 1; | |
1282 | } | |
1283 | ||
1284 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1285 | { | |
332eb390 | 1286 | PACKET session_id, extpkt; |
b9908bf9 | 1287 | size_t session_id_len; |
b6981744 | 1288 | const unsigned char *cipherchars; |
11c67eea | 1289 | int al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1290 | unsigned int compression; |
4fa52141 | 1291 | unsigned int sversion; |
3434f40b | 1292 | unsigned int context; |
4fa52141 | 1293 | int protverr; |
332eb390 | 1294 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1295 | #ifndef OPENSSL_NO_COMP |
1296 | SSL_COMP *comp; | |
1297 | #endif | |
1298 | ||
4fa52141 VD |
1299 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1300 | al = SSL_AD_DECODE_ERROR; | |
1301 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1302 | goto f_err; | |
1303 | } | |
50932c4a | 1304 | |
c3043dcd MC |
1305 | /* load the server random */ |
1306 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
1307 | al = SSL_AD_DECODE_ERROR; | |
1308 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1309 | goto f_err; | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * We do this immediately so we know what format the ServerHello is in. | |
1314 | * Must be done after reading the random data so we can check for the | |
1315 | * TLSv1.3 downgrade sentinels | |
1316 | */ | |
1317 | protverr = ssl_choose_client_version(s, sversion, 1, &al); | |
4fa52141 | 1318 | if (protverr != 0) { |
4fa52141 VD |
1319 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); |
1320 | goto f_err; | |
0f113f3e | 1321 | } |
0f113f3e | 1322 | |
524420d8 MC |
1323 | /* |
1324 | * In TLSv1.3 a ServerHello message signals a key change so the end of the | |
1325 | * message must be on a record boundary. | |
1326 | */ | |
1327 | if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1328 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1329 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1330 | goto f_err; | |
1331 | } | |
1332 | ||
fc5ce51d | 1333 | /* Get the session-id. */ |
71728dd8 MC |
1334 | if (!SSL_IS_TLS13(s)) { |
1335 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1336 | al = SSL_AD_DECODE_ERROR; | |
1337 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1338 | goto f_err; | |
1339 | } | |
1340 | session_id_len = PACKET_remaining(&session_id); | |
1341 | if (session_id_len > sizeof s->session->session_id | |
1342 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1343 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1344 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1345 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1346 | goto f_err; | |
1347 | } | |
1348 | } else { | |
625b0d51 | 1349 | PACKET_null_init(&session_id); |
71728dd8 | 1350 | session_id_len = 0; |
0f113f3e | 1351 | } |
e481f9b9 | 1352 | |
73999b62 | 1353 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1354 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1355 | al = SSL_AD_DECODE_ERROR; |
1356 | goto f_err; | |
1357 | } | |
1358 | ||
4ff65f77 MC |
1359 | if (!SSL_IS_TLS13(s)) { |
1360 | if (!PACKET_get_1(pkt, &compression)) { | |
1361 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1362 | al = SSL_AD_DECODE_ERROR; | |
1363 | goto f_err; | |
1364 | } | |
1365 | } else { | |
1366 | compression = 0; | |
1367 | } | |
1368 | ||
1369 | /* TLS extensions */ | |
1370 | if (PACKET_remaining(pkt) == 0) { | |
1371 | PACKET_null_init(&extpkt); | |
1372 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1373 | al = SSL_AD_DECODE_ERROR; | |
1374 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1375 | goto f_err; | |
1376 | } | |
1377 | ||
fe874d27 MC |
1378 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1379 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1380 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1381 | goto f_err; |
1382 | ||
1383 | s->hit = 0; | |
1384 | ||
1385 | if (SSL_IS_TLS13(s)) { | |
1386 | /* This will set s->hit if we are resuming */ | |
1387 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1388 | SSL_EXT_TLS1_3_SERVER_HELLO, |
4ff65f77 MC |
1389 | extensions, NULL, 0, &al)) |
1390 | goto f_err; | |
1391 | } else { | |
8c1a5343 | 1392 | /* |
4ff65f77 MC |
1393 | * Check if we can resume the session based on external pre-shared |
1394 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1395 | * Resumption based on server-side state works with session IDs. | |
1396 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1397 | * works by overriding the SessionTicket extension at the application | |
1398 | * layer, and does not send a session ID. (We do not know whether | |
1399 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1400 | * ID alone is not a reliable indicator of session resumption, so we | |
1401 | * first check if we can resume, and later peek at the next handshake | |
1402 | * message to see if the server wants to resume. | |
8c1a5343 | 1403 | */ |
4ff65f77 MC |
1404 | if (s->version >= TLS1_VERSION |
1405 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1406 | const SSL_CIPHER *pref_cipher = NULL; | |
1407 | /* | |
1408 | * s->session->master_key_length is a size_t, but this is an int for | |
1409 | * backwards compat reasons | |
1410 | */ | |
1411 | int master_key_length; | |
1412 | master_key_length = sizeof(s->session->master_key); | |
1413 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1414 | &master_key_length, | |
1415 | NULL, &pref_cipher, | |
1416 | s->ext.session_secret_cb_arg) | |
1417 | && master_key_length > 0) { | |
1418 | s->session->master_key_length = master_key_length; | |
1419 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1420 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1421 | } else { |
1422 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1423 | al = SSL_AD_INTERNAL_ERROR; | |
1424 | goto f_err; | |
1425 | } | |
0f113f3e | 1426 | } |
4ff65f77 MC |
1427 | |
1428 | if (session_id_len != 0 | |
1429 | && session_id_len == s->session->session_id_length | |
1430 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1431 | session_id_len) == 0) | |
1432 | s->hit = 1; | |
50932c4a MC |
1433 | } |
1434 | ||
4ff65f77 | 1435 | if (s->hit) { |
0f113f3e | 1436 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1437 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1438 | /* actually a client application bug */ |
1439 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1440 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1441 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1442 | goto f_err; | |
1443 | } | |
6e3d0153 | 1444 | } else { |
0f113f3e | 1445 | /* |
6e3d0153 | 1446 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1447 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1448 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1449 | * so the PAC-based session secret is always preserved. It'll be | |
1450 | * overwritten if the server refuses resumption. | |
0f113f3e | 1451 | */ |
4ff65f77 MC |
1452 | if (s->session->session_id_length > 0 |
1453 | || (SSL_IS_TLS13(s) | |
1454 | && s->session->ext.tick_identity | |
1455 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1456 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1457 | if (!ssl_get_new_session(s, 0)) { |
1458 | goto f_err; | |
1459 | } | |
1460 | } | |
50932c4a | 1461 | |
ccae4a15 | 1462 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1463 | s->session->session_id_length = session_id_len; |
1464 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1465 | if (session_id_len > 0) |
1466 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1467 | session_id_len); | |
0f113f3e | 1468 | } |
fc5ce51d | 1469 | |
ccae4a15 FI |
1470 | /* Session version and negotiated protocol version should match */ |
1471 | if (s->version != s->session->ssl_version) { | |
1472 | al = SSL_AD_PROTOCOL_VERSION; | |
1473 | ||
1474 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1475 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1476 | goto f_err; | |
1477 | } | |
0f113f3e | 1478 | /* |
3eb2aff4 KR |
1479 | * Now that we know the version, update the check to see if it's an allowed |
1480 | * version. | |
1481 | */ | |
1482 | s->s3->tmp.min_ver = s->version; | |
1483 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1484 | |
11c67eea | 1485 | if (!set_client_ciphersuite(s, cipherchars)) { |
0f113f3e | 1486 | al = SSL_AD_ILLEGAL_PARAMETER; |
0f113f3e MC |
1487 | goto f_err; |
1488 | } | |
1489 | ||
09b6c2ef | 1490 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1491 | if (compression != 0) { |
0f113f3e | 1492 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1493 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1494 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1495 | goto f_err; | |
1496 | } | |
1497 | /* | |
1498 | * If compression is disabled we'd better not try to resume a session | |
1499 | * using compression. | |
1500 | */ | |
1501 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1502 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1503 | goto f_err; |
1504 | } | |
09b6c2ef | 1505 | #else |
fc5ce51d | 1506 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1507 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1508 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1509 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1510 | goto f_err; | |
1511 | } | |
fc5ce51d | 1512 | if (compression == 0) |
0f113f3e MC |
1513 | comp = NULL; |
1514 | else if (!ssl_allow_compression(s)) { | |
1515 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1516 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1517 | goto f_err; |
fc5ce51d EK |
1518 | } else { |
1519 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1520 | } | |
0f113f3e | 1521 | |
fc5ce51d | 1522 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1523 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1524 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1525 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1526 | goto f_err; | |
1527 | } else { | |
1528 | s->s3->tmp.new_compression = comp; | |
1529 | } | |
09b6c2ef | 1530 | #endif |
761772d7 | 1531 | |
4ff65f77 | 1532 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1533 | goto f_err; |
1534 | ||
8723588e MC |
1535 | #ifndef OPENSSL_NO_SCTP |
1536 | if (SSL_IS_DTLS(s) && s->hit) { | |
1537 | unsigned char sctpauthkey[64]; | |
1538 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1539 | ||
1540 | /* | |
1541 | * Add new shared key for SCTP-Auth, will be ignored if | |
1542 | * no SCTP used. | |
1543 | */ | |
141eb8c6 MC |
1544 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1545 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1546 | |
1547 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1548 | sizeof(sctpauthkey), |
1549 | labelbuffer, | |
1550 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1551 | goto f_err; |
8723588e MC |
1552 | |
1553 | BIO_ctrl(SSL_get_wbio(s), | |
1554 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1555 | sizeof(sctpauthkey), sctpauthkey); | |
1556 | } | |
1557 | #endif | |
1558 | ||
92760c21 MC |
1559 | /* |
1560 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1561 | * we're done with this message | |
1562 | */ | |
1563 | if (SSL_IS_TLS13(s) | |
1564 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1565 | || !s->method->ssl3_enc->change_cipher_state(s, |
1566 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1567 | al = SSL_AD_INTERNAL_ERROR; | |
1568 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1569 | goto f_err; | |
1570 | } | |
1571 | ||
1b0286a3 | 1572 | OPENSSL_free(extensions); |
b9908bf9 | 1573 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1574 | f_err: |
1575 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1576 | ossl_statem_set_error(s); |
1b0286a3 | 1577 | OPENSSL_free(extensions); |
b9908bf9 | 1578 | return MSG_PROCESS_ERROR; |
0f113f3e | 1579 | } |
d02b48c6 | 1580 | |
3847d426 MC |
1581 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1582 | { | |
1583 | unsigned int sversion; | |
2248dbeb | 1584 | int errorcode; |
11c67eea | 1585 | const unsigned char *cipherchars; |
3847d426 MC |
1586 | RAW_EXTENSION *extensions = NULL; |
1587 | int al; | |
1588 | PACKET extpkt; | |
1589 | ||
1590 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1591 | al = SSL_AD_DECODE_ERROR; | |
1592 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1593 | goto f_err; | |
1594 | } | |
1595 | ||
1596 | s->hello_retry_request = 1; | |
1597 | ||
1598 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
c3043dcd | 1599 | errorcode = ssl_choose_client_version(s, sversion, 0, &al); |
2248dbeb | 1600 | if (errorcode != 0) { |
2248dbeb | 1601 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1602 | goto f_err; |
1603 | } | |
1604 | ||
11c67eea MC |
1605 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
1606 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1607 | al = SSL_AD_DECODE_ERROR; | |
1608 | goto f_err; | |
1609 | } | |
1610 | ||
1611 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1612 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1613 | goto f_err; | |
1614 | } | |
1615 | ||
3847d426 MC |
1616 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { |
1617 | al = SSL_AD_DECODE_ERROR; | |
1618 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1619 | goto f_err; | |
1620 | } | |
1621 | ||
fe874d27 | 1622 | if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
fc5ece2e | 1623 | &extensions, &al, NULL) |
fe874d27 | 1624 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
3847d426 MC |
1625 | extensions, NULL, 0, &al)) |
1626 | goto f_err; | |
1627 | ||
1628 | OPENSSL_free(extensions); | |
1629 | ||
11c67eea MC |
1630 | /* |
1631 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1632 | * a synthetic message_hash in place of ClientHello1. | |
1633 | */ | |
1634 | if (!create_synthetic_message_hash(s)) { | |
1635 | al = SSL_AD_INTERNAL_ERROR; | |
1636 | goto f_err; | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * Add this message to the Transcript Hash. Normally this is done | |
1641 | * automatically prior to the message processing stage. However due to the | |
1642 | * need to create the synthetic message hash, we defer that step until now | |
1643 | * for HRR messages. | |
1644 | */ | |
1645 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1646 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
1647 | al = SSL_AD_INTERNAL_ERROR; | |
1648 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); | |
1649 | goto f_err; | |
1650 | } | |
1651 | ||
3847d426 MC |
1652 | return MSG_PROCESS_FINISHED_READING; |
1653 | f_err: | |
1654 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1655 | ossl_statem_set_error(s); | |
1656 | OPENSSL_free(extensions); | |
1657 | return MSG_PROCESS_ERROR; | |
1658 | } | |
1659 | ||
be3583fa | 1660 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1661 | { |
1662 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1663 | unsigned long cert_list_len, cert_len; | |
1664 | X509 *x = NULL; | |
b6981744 | 1665 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1666 | STACK_OF(X509) *sk = NULL; |
1667 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1668 | size_t chainidx; |
e96e0f8e | 1669 | unsigned int context = 0; |
0f113f3e MC |
1670 | |
1671 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1672 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1673 | goto err; |
0f113f3e MC |
1674 | } |
1675 | ||
e96e0f8e MC |
1676 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1677 | || context != 0 | |
1678 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1679 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1680 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1681 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1682 | goto f_err; |
1683 | } | |
d805a57b | 1684 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1685 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1686 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1687 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1688 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1689 | SSL_R_CERT_LENGTH_MISMATCH); |
1690 | goto f_err; | |
1691 | } | |
1692 | ||
df758a85 MC |
1693 | certstart = certbytes; |
1694 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1695 | if (x == NULL) { |
1696 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1697 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1698 | goto f_err; |
1699 | } | |
df758a85 | 1700 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1701 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1702 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1703 | SSL_R_CERT_LENGTH_MISMATCH); |
1704 | goto f_err; | |
1705 | } | |
e96e0f8e MC |
1706 | |
1707 | if (SSL_IS_TLS13(s)) { | |
1708 | RAW_EXTENSION *rawexts = NULL; | |
1709 | PACKET extensions; | |
1710 | ||
1711 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1712 | al = SSL_AD_DECODE_ERROR; | |
1713 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1714 | goto f_err; | |
1715 | } | |
fe874d27 MC |
1716 | if (!tls_collect_extensions(s, &extensions, |
1717 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
1718 | &al, NULL) | |
1719 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, | |
5ee289ea MC |
1720 | rawexts, x, chainidx, &al)) { |
1721 | OPENSSL_free(rawexts); | |
e96e0f8e | 1722 | goto f_err; |
5ee289ea MC |
1723 | } |
1724 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1725 | } |
1726 | ||
0f113f3e | 1727 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1728 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1729 | goto err; |
0f113f3e MC |
1730 | } |
1731 | x = NULL; | |
0f113f3e MC |
1732 | } |
1733 | ||
1734 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1735 | /* |
1736 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1737 | * for client side verification of the server certificate to take place. | |
1738 | * However, historically the code has only checked that *any* flag is set | |
1739 | * to cause server verification to take place. Use of the other flags makes | |
1740 | * no sense in client mode. An attempt to clean up the semantics was | |
1741 | * reverted because at least one application *only* set | |
1742 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1743 | * server verification to take place, after the clean up it silently did | |
1744 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1745 | * sent to them because they are void functions. Therefore, we now use the | |
1746 | * (less clean) historic behaviour of performing validation if any flag is | |
1747 | * set. The *documented* interface remains the same. | |
1748 | */ | |
1749 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1750 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1751 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1752 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1753 | goto f_err; | |
1754 | } | |
1755 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1756 | if (i > 1) { | |
b9908bf9 | 1757 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1758 | al = SSL_AD_HANDSHAKE_FAILURE; |
1759 | goto f_err; | |
1760 | } | |
1761 | ||
c34b0f99 | 1762 | s->session->peer_chain = sk; |
0f113f3e MC |
1763 | /* |
1764 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1765 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1766 | */ |
1767 | x = sk_X509_value(sk, 0); | |
1768 | sk = NULL; | |
1769 | /* | |
1770 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1771 | */ | |
1772 | ||
8382fd3a | 1773 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1774 | |
55a9a16f | 1775 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1776 | x = NULL; |
1777 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1778 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1779 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1780 | goto f_err; | |
1781 | } | |
1782 | ||
1783 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1784 | if (i < 0) { |
0f113f3e MC |
1785 | x = NULL; |
1786 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1787 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1788 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1789 | goto f_err; | |
1790 | } | |
05b8486e DSH |
1791 | /* |
1792 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1793 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1794 | * type. | |
1795 | */ | |
1796 | if (!SSL_IS_TLS13(s)) { | |
1797 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1798 | if (exp_idx >= 0 && i != exp_idx | |
1799 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1800 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1801 | && i != SSL_PKEY_GOST01))) { | |
1802 | x = NULL; | |
1803 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1804 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1805 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1806 | goto f_err; | |
1807 | } | |
0f113f3e | 1808 | } |
a273c6ee | 1809 | s->session->peer_type = i; |
55a9a16f MC |
1810 | |
1811 | X509_free(s->session->peer); | |
05f0fb9f | 1812 | X509_up_ref(x); |
55a9a16f | 1813 | s->session->peer = x; |
0f113f3e | 1814 | s->session->verify_result = s->verify_result; |
0f113f3e | 1815 | x = NULL; |
2c5dfdc3 MC |
1816 | |
1817 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1818 | if (SSL_IS_TLS13(s) | |
1819 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1820 | sizeof(s->cert_verify_hash), | |
1821 | &s->cert_verify_hash_len)) { | |
1822 | al = SSL_AD_INTERNAL_ERROR; | |
1823 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1824 | goto f_err; | |
1825 | } | |
1826 | ||
b9908bf9 | 1827 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1828 | goto done; |
1829 | ||
0f113f3e | 1830 | f_err: |
66696478 | 1831 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1832 | err: |
fe3a3291 | 1833 | ossl_statem_set_error(s); |
66696478 | 1834 | done: |
0f113f3e MC |
1835 | X509_free(x); |
1836 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1837 | return ret; |
0f113f3e | 1838 | } |
d02b48c6 | 1839 | |
7dc1c647 | 1840 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1841 | { |
1842 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1843 | PACKET psk_identity_hint; |
02a74590 | 1844 | |
7dc1c647 MC |
1845 | /* PSK ciphersuites are preceded by an identity hint */ |
1846 | ||
1847 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1848 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1849 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1850 | return 0; |
1851 | } | |
1852 | ||
1853 | /* | |
1854 | * Store PSK identity hint for later use, hint is used in | |
1855 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1856 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1857 | * identity. | |
1858 | */ | |
1859 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1860 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1861 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1862 | return 0; |
1863 | } | |
02a74590 | 1864 | |
7dc1c647 MC |
1865 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1866 | OPENSSL_free(s->session->psk_identity_hint); | |
1867 | s->session->psk_identity_hint = NULL; | |
1868 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1869 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1870 | *al = SSL_AD_INTERNAL_ERROR; |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | return 1; | |
1875 | #else | |
4fa88861 | 1876 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1877 | *al = SSL_AD_INTERNAL_ERROR; |
1878 | return 0; | |
02a74590 MC |
1879 | #endif |
1880 | } | |
1881 | ||
25c6c10c MC |
1882 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1883 | { | |
1884 | #ifndef OPENSSL_NO_SRP | |
1885 | PACKET prime, generator, salt, server_pub; | |
1886 | ||
1887 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1888 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1889 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1890 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1891 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1892 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1893 | return 0; |
1894 | } | |
1895 | ||
348240c6 | 1896 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1897 | if ((s->srp_ctx.N = |
1898 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1899 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1900 | || (s->srp_ctx.g = |
1901 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1902 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1903 | || (s->srp_ctx.s = |
1904 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1905 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1906 | || (s->srp_ctx.B = |
1907 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1908 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1909 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1910 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1911 | return 0; |
1912 | } | |
1913 | ||
1914 | if (!srp_verify_server_param(s, al)) { | |
1915 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1916 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1917 | return 0; |
1918 | } | |
1919 | ||
1920 | /* We must check if there is a certificate */ | |
a230b26e | 1921 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1922 | *pkey = X509_get0_pubkey(s->session->peer); |
1923 | ||
1924 | return 1; | |
1925 | #else | |
4fa88861 | 1926 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1927 | *al = SSL_AD_INTERNAL_ERROR; |
1928 | return 0; | |
1929 | #endif | |
1930 | } | |
1931 | ||
e01a610d MC |
1932 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1933 | { | |
1934 | #ifndef OPENSSL_NO_DH | |
1935 | PACKET prime, generator, pub_key; | |
1936 | EVP_PKEY *peer_tmp = NULL; | |
1937 | ||
1938 | DH *dh = NULL; | |
1939 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1940 | ||
26505153 RL |
1941 | int check_bits = 0; |
1942 | ||
e01a610d MC |
1943 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1944 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1945 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1946 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1947 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1948 | return 0; |
1949 | } | |
1950 | ||
1951 | peer_tmp = EVP_PKEY_new(); | |
1952 | dh = DH_new(); | |
1953 | ||
1954 | if (peer_tmp == NULL || dh == NULL) { | |
1955 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1956 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1957 | goto err; |
1958 | } | |
1959 | ||
348240c6 MC |
1960 | /* TODO(size_t): Convert these calls */ |
1961 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1962 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1963 | NULL); | |
1964 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1965 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1966 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1967 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1968 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1969 | goto err; |
1970 | } | |
1971 | ||
69687aa8 | 1972 | /* test non-zero pubkey */ |
26505153 | 1973 | if (BN_is_zero(bnpub_key)) { |
e01a610d | 1974 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1975 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1976 | goto err; |
1977 | } | |
1978 | ||
1979 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1980 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1981 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1982 | goto err; |
1983 | } | |
1984 | p = g = NULL; | |
1985 | ||
26505153 RL |
1986 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1987 | *al = SSL_AD_DECODE_ERROR; | |
1988 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1989 | goto err; | |
1990 | } | |
1991 | ||
e01a610d MC |
1992 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1993 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1994 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1995 | goto err; |
1996 | } | |
1997 | bnpub_key = NULL; | |
1998 | ||
1999 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
2000 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 2001 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
2002 | goto err; |
2003 | } | |
2004 | ||
2005 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
2006 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 2007 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
2008 | goto err; |
2009 | } | |
2010 | ||
2011 | s->s3->peer_tmp = peer_tmp; | |
2012 | ||
2013 | /* | |
2014 | * FIXME: This makes assumptions about which ciphersuites come with | |
2015 | * public keys. We should have a less ad-hoc way of doing this | |
2016 | */ | |
a230b26e | 2017 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2018 | *pkey = X509_get0_pubkey(s->session->peer); |
2019 | /* else anonymous DH, so no certificate or pkey. */ | |
2020 | ||
2021 | return 1; | |
2022 | ||
2023 | err: | |
2024 | BN_free(p); | |
2025 | BN_free(g); | |
2026 | BN_free(bnpub_key); | |
2027 | DH_free(dh); | |
2028 | EVP_PKEY_free(peer_tmp); | |
2029 | ||
2030 | return 0; | |
2031 | #else | |
4fa88861 | 2032 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
2033 | *al = SSL_AD_INTERNAL_ERROR; |
2034 | return 0; | |
2035 | #endif | |
2036 | } | |
2037 | ||
ff74aeb1 MC |
2038 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
2039 | { | |
2040 | #ifndef OPENSSL_NO_EC | |
2041 | PACKET encoded_pt; | |
2042 | const unsigned char *ecparams; | |
2043 | int curve_nid; | |
ec24630a | 2044 | unsigned int curve_flags; |
ff74aeb1 MC |
2045 | EVP_PKEY_CTX *pctx = NULL; |
2046 | ||
2047 | /* | |
2048 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
2049 | * public key. For now we only support named (not generic) curves and | |
2050 | * ECParameters in this case is just three bytes. | |
2051 | */ | |
2052 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
2053 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2054 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2055 | return 0; |
2056 | } | |
2057 | /* | |
2058 | * Check curve is one of our preferences, if not server has sent an | |
2059 | * invalid curve. ECParameters is 3 bytes. | |
2060 | */ | |
2061 | if (!tls1_check_curve(s, ecparams, 3)) { | |
2062 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2063 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2064 | return 0; |
2065 | } | |
2066 | ||
ec24630a DSH |
2067 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
2068 | ||
a230b26e | 2069 | if (curve_nid == 0) { |
ff74aeb1 | 2070 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 2071 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
2072 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
2073 | return 0; | |
2074 | } | |
2075 | ||
ec24630a DSH |
2076 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
2077 | EVP_PKEY *key = EVP_PKEY_new(); | |
2078 | ||
2079 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
2080 | *al = SSL_AD_INTERNAL_ERROR; | |
2081 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2082 | EVP_PKEY_free(key); | |
2083 | return 0; | |
2084 | } | |
2085 | s->s3->peer_tmp = key; | |
2086 | } else { | |
2087 | /* Set up EVP_PKEY with named curve as parameters */ | |
2088 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
2089 | if (pctx == NULL | |
2090 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2091 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2092 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2093 | *al = SSL_AD_INTERNAL_ERROR; | |
2094 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2095 | EVP_PKEY_CTX_free(pctx); | |
2096 | return 0; | |
2097 | } | |
ff74aeb1 | 2098 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2099 | pctx = NULL; |
ff74aeb1 | 2100 | } |
ff74aeb1 MC |
2101 | |
2102 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2103 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2104 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2105 | return 0; |
2106 | } | |
2107 | ||
ec24630a DSH |
2108 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2109 | PACKET_data(&encoded_pt), | |
2110 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 2111 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 2112 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2113 | return 0; |
2114 | } | |
2115 | ||
2116 | /* | |
2117 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2118 | * ECParameters in the server key exchange message. We do support RSA | |
2119 | * and ECDSA. | |
2120 | */ | |
2121 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2122 | *pkey = X509_get0_pubkey(s->session->peer); | |
2123 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2124 | *pkey = X509_get0_pubkey(s->session->peer); | |
2125 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2126 | ||
2127 | return 1; | |
2128 | #else | |
4fa88861 | 2129 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2130 | *al = SSL_AD_INTERNAL_ERROR; |
2131 | return 0; | |
2132 | #endif | |
2133 | } | |
2134 | ||
be3583fa | 2135 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2136 | { |
5554facb | 2137 | int al = -1; |
e1e588ac | 2138 | long alg_k; |
b9908bf9 | 2139 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2140 | EVP_MD_CTX *md_ctx = NULL; |
2141 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2142 | PACKET save_param_start, signature; |
b9908bf9 | 2143 | |
b9908bf9 MC |
2144 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2145 | ||
73999b62 | 2146 | save_param_start = *pkt; |
8d92c1f8 | 2147 | |
3260adf1 | 2148 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2149 | EVP_PKEY_free(s->s3->peer_tmp); |
2150 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2151 | #endif |
d02b48c6 | 2152 | |
7689082b | 2153 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2154 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2155 | goto err; | |
7689082b DSH |
2156 | } |
2157 | ||
2158 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2159 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2160 | } else if (alg_k & SSL_kSRP) { |
2161 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2162 | goto err; |
e01a610d MC |
2163 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2164 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2165 | goto err; | |
ff74aeb1 MC |
2166 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2167 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2168 | goto err; | |
0f113f3e MC |
2169 | } else if (alg_k) { |
2170 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2171 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2172 | goto err; |
0f113f3e | 2173 | } |
0f113f3e | 2174 | |
0f113f3e MC |
2175 | /* if it was signed, check the signature */ |
2176 | if (pkey != NULL) { | |
32942870 | 2177 | PACKET params; |
be8dba2c MC |
2178 | int maxsig; |
2179 | const EVP_MD *md = NULL; | |
e1e588ac | 2180 | |
32942870 EK |
2181 | /* |
2182 | * |pkt| now points to the beginning of the signature, so the difference | |
2183 | * equals the length of the parameters. | |
2184 | */ | |
2185 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2186 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2187 | PACKET_remaining(pkt))) { |
32942870 | 2188 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2189 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2190 | goto err; |
32942870 EK |
2191 | } |
2192 | ||
0f113f3e | 2193 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2194 | unsigned int sigalg; |
0f113f3e | 2195 | int rv; |
703bcee0 MC |
2196 | |
2197 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2198 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2199 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2200 | goto err; |
0f113f3e | 2201 | } |
5554facb | 2202 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2203 | if (rv == -1) { |
2204 | al = SSL_AD_INTERNAL_ERROR; | |
2205 | goto err; | |
2206 | } else if (rv == 0) { | |
2207 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2208 | goto err; |
0f113f3e | 2209 | } |
a2f9200f | 2210 | #ifdef SSL_DEBUG |
0f113f3e MC |
2211 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2212 | #endif | |
f365a3e2 DSH |
2213 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2214 | al = SSL_AD_INTERNAL_ERROR; | |
2215 | goto err; | |
32942870 | 2216 | } |
0f113f3e | 2217 | |
f365a3e2 DSH |
2218 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2219 | ||
73999b62 MC |
2220 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2221 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2222 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2223 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2224 | goto err; |
0f113f3e | 2225 | } |
be8dba2c MC |
2226 | maxsig = EVP_PKEY_size(pkey); |
2227 | if (maxsig < 0) { | |
e1e588ac | 2228 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2229 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2230 | goto err; |
8098fc56 | 2231 | } |
0f113f3e MC |
2232 | |
2233 | /* | |
8098fc56 | 2234 | * Check signature length |
0f113f3e | 2235 | */ |
be8dba2c | 2236 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2237 | /* wrong packet length */ |
e1e588ac | 2238 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2239 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2240 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2241 | goto err; |
2242 | } | |
2243 | ||
2244 | md_ctx = EVP_MD_CTX_new(); | |
2245 | if (md_ctx == NULL) { | |
2246 | al = SSL_AD_INTERNAL_ERROR; | |
2247 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2248 | goto err; | |
0f113f3e | 2249 | } |
e1e588ac | 2250 | |
fe3066ee MC |
2251 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2252 | al = SSL_AD_INTERNAL_ERROR; | |
2253 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2254 | goto err; | |
2255 | } | |
5554facb | 2256 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2257 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2258 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2259 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2260 | al = SSL_AD_INTERNAL_ERROR; |
2261 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2262 | goto err; | |
2263 | } | |
2264 | } | |
2265 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2266 | SSL3_RANDOM_SIZE) <= 0 | |
2267 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2268 | SSL3_RANDOM_SIZE) <= 0 | |
2269 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2270 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2271 | al = SSL_AD_INTERNAL_ERROR; |
2272 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2273 | goto err; |
192e4bbb | 2274 | } |
fe3066ee MC |
2275 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2276 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2277 | /* bad signature */ |
2278 | al = SSL_AD_DECRYPT_ERROR; | |
2279 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2280 | goto err; |
0f113f3e | 2281 | } |
e1e588ac | 2282 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2283 | md_ctx = NULL; |
0f113f3e | 2284 | } else { |
7689082b | 2285 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2286 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2287 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2288 | /* Might be wrong key type, check it */ |
e1e588ac | 2289 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2290 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2291 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2292 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2293 | } else { |
2294 | al = SSL_AD_DECODE_ERROR; | |
2295 | } | |
0f113f3e MC |
2296 | goto err; |
2297 | } | |
2298 | /* still data left over */ | |
73999b62 | 2299 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2300 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2301 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2302 | goto err; |
0f113f3e MC |
2303 | } |
2304 | } | |
e1e588ac | 2305 | |
b9908bf9 | 2306 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2307 | err: |
7dc1c647 MC |
2308 | if (al != -1) |
2309 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2310 | ossl_statem_set_error(s); |
fe3066ee | 2311 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2312 | return MSG_PROCESS_ERROR; |
0f113f3e | 2313 | } |
d02b48c6 | 2314 | |
be3583fa | 2315 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2316 | { |
2317 | int ret = MSG_PROCESS_ERROR; | |
32f66107 DSH |
2318 | int al = SSL_AD_DECODE_ERROR; |
2319 | size_t i; | |
2320 | ||
2321 | /* Clear certificate validity flags */ | |
2322 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2323 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2324 | |
03f44b97 | 2325 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2326 | PACKET reqctx, extensions; |
2327 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2328 | |
2329 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2330 | OPENSSL_free(s->s3->tmp.ctype); | |
2331 | s->s3->tmp.ctype = NULL; | |
2332 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2333 | |
03f44b97 DSH |
2334 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2335 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2336 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2337 | SSL_R_LENGTH_MISMATCH); | |
2338 | goto err; | |
2339 | } | |
32f66107 DSH |
2340 | |
2341 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
45615c5f | 2342 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_BAD_LENGTH); |
32f66107 DSH |
2343 | goto err; |
2344 | } | |
2345 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2346 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
32f66107 | 2347 | &rawexts, &al, NULL) |
fe874d27 | 2348 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
32f66107 DSH |
2349 | rawexts, NULL, 0, &al)) { |
2350 | OPENSSL_free(rawexts); | |
2351 | goto err; | |
2352 | } | |
2353 | OPENSSL_free(rawexts); | |
2354 | if (!tls1_process_sigalgs(s)) { | |
2355 | al = SSL_AD_INTERNAL_ERROR; | |
2356 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2357 | goto err; | |
2358 | } | |
03f44b97 DSH |
2359 | } else { |
2360 | PACKET ctypes; | |
75c13e78 | 2361 | |
03f44b97 DSH |
2362 | /* get the certificate types */ |
2363 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
03f44b97 DSH |
2364 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2365 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2366 | goto err; |
03f44b97 DSH |
2367 | } |
2368 | ||
2369 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
32f66107 | 2370 | al = SSL_AD_INTERNAL_ERROR; |
03f44b97 DSH |
2371 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); |
2372 | goto err; | |
2373 | } | |
ac112332 | 2374 | |
32f66107 DSH |
2375 | if (SSL_USE_SIGALGS(s)) { |
2376 | PACKET sigalgs; | |
703bcee0 | 2377 | |
32f66107 DSH |
2378 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
2379 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2380 | SSL_R_LENGTH_MISMATCH); | |
2381 | goto err; | |
2382 | } | |
ac112332 | 2383 | |
32f66107 DSH |
2384 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
2385 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2386 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2387 | goto err; | |
2388 | } | |
2389 | if (!tls1_process_sigalgs(s)) { | |
2390 | al = SSL_AD_INTERNAL_ERROR; | |
2391 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2392 | ERR_R_MALLOC_FAILURE); | |
2393 | goto err; | |
2394 | } | |
0f113f3e | 2395 | } |
0f113f3e | 2396 | |
32f66107 DSH |
2397 | /* get the CA RDNs */ |
2398 | if (!parse_ca_names(s, pkt, &al)) | |
03f44b97 | 2399 | goto err; |
03f44b97 DSH |
2400 | } |
2401 | ||
2402 | if (PACKET_remaining(pkt) != 0) { | |
03f44b97 DSH |
2403 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
2404 | goto err; | |
2405 | } | |
0f113f3e | 2406 | |
0f113f3e MC |
2407 | /* we should setup a certificate to return.... */ |
2408 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2409 | |
05c4f1d5 | 2410 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2411 | goto done; |
0f113f3e | 2412 | err: |
32f66107 | 2413 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
fe3a3291 | 2414 | ossl_statem_set_error(s); |
cc273a93 | 2415 | done: |
b9908bf9 | 2416 | return ret; |
0f113f3e MC |
2417 | } |
2418 | ||
be3583fa | 2419 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2420 | { |
6df55cac | 2421 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2422 | unsigned int ticklen; |
9ac6244b | 2423 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2424 | unsigned int sess_len; |
de1df7e9 | 2425 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2426 | |
73999b62 | 2427 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2428 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2429 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2430 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2431 | || (SSL_IS_TLS13(s) |
2432 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2433 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2434 | goto f_err; |
2435 | } | |
2436 | ||
de1df7e9 MC |
2437 | /* |
2438 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2439 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2440 | * be 0 here in that instance | |
2441 | */ | |
e711da71 | 2442 | if (ticklen == 0) |
c9de4a20 | 2443 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2444 | |
98ece4ee MC |
2445 | if (s->session->session_id_length > 0) { |
2446 | int i = s->session_ctx->session_cache_mode; | |
2447 | SSL_SESSION *new_sess; | |
2448 | /* | |
2449 | * We reused an existing session, so we need to replace it with a new | |
2450 | * one | |
2451 | */ | |
2452 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2453 | /* | |
e4612d02 | 2454 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2455 | */ |
e4612d02 | 2456 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2457 | } |
2458 | ||
2459 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2460 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2461 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2462 | goto f_err; |
2463 | } | |
2464 | ||
2465 | SSL_SESSION_free(s->session); | |
2466 | s->session = new_sess; | |
2467 | } | |
2468 | ||
fc24f0bf MC |
2469 | /* |
2470 | * Technically the cast to long here is not guaranteed by the C standard - | |
2471 | * but we use it elsewhere, so this should be ok. | |
2472 | */ | |
2473 | s->session->time = (long)time(NULL); | |
2474 | ||
aff8c126 RS |
2475 | OPENSSL_free(s->session->ext.tick); |
2476 | s->session->ext.tick = NULL; | |
2477 | s->session->ext.ticklen = 0; | |
e711da71 | 2478 | |
aff8c126 RS |
2479 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2480 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2481 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2482 | goto err; |
2483 | } | |
aff8c126 | 2484 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2485 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2486 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2487 | goto f_err; |
2488 | } | |
e711da71 | 2489 | |
aff8c126 | 2490 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2491 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2492 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2493 | |
2494 | if (SSL_IS_TLS13(s)) { | |
2495 | PACKET extpkt; | |
2496 | ||
2497 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2498 | || !tls_collect_extensions(s, &extpkt, | |
fe874d27 | 2499 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
fc5ece2e | 2500 | &exts, &al, NULL) |
fe874d27 MC |
2501 | || !tls_parse_all_extensions(s, |
2502 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
de1df7e9 MC |
2503 | exts, NULL, 0, &al)) { |
2504 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2505 | goto f_err; | |
2506 | } | |
2507 | } | |
2508 | ||
0f113f3e MC |
2509 | /* |
2510 | * There are two ways to detect a resumed ticket session. One is to set | |
2511 | * an appropriate session ID and then the server must return a match in | |
2512 | * ServerHello. This allows the normal client session ID matching to work | |
2513 | * and we know much earlier that the ticket has been accepted. The | |
2514 | * other way is to set zero length session ID when the ticket is | |
2515 | * presented and rely on the handshake to determine session resumption. | |
2516 | * We choose the former approach because this fits in with assumptions | |
2517 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2518 | * SHA256 is disabled) hash of the ticket. | |
2519 | */ | |
ec60ccc1 MC |
2520 | /* |
2521 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2522 | * but s->session->session_id_length is a size_t | |
2523 | */ | |
aff8c126 | 2524 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2525 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2526 | EVP_sha256(), NULL)) { |
2527 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2528 | goto err; | |
2529 | } | |
ec60ccc1 | 2530 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2531 | |
2532 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2533 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2534 | OPENSSL_free(exts); |
de1df7e9 MC |
2535 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2536 | return MSG_PROCESS_FINISHED_READING; | |
2537 | } | |
2538 | ||
b9908bf9 | 2539 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2540 | f_err: |
2541 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2542 | err: | |
fe3a3291 | 2543 | ossl_statem_set_error(s); |
33d93417 | 2544 | OPENSSL_free(exts); |
b9908bf9 | 2545 | return MSG_PROCESS_ERROR; |
0f113f3e | 2546 | } |
67c8e7f4 | 2547 | |
f63e4288 MC |
2548 | /* |
2549 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2550 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2551 | * |*al| is populated with a suitable alert code. | |
2552 | */ | |
2553 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2554 | { |
8b0e934a | 2555 | size_t resplen; |
b9908bf9 | 2556 | unsigned int type; |
b9908bf9 | 2557 | |
73999b62 | 2558 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2559 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2560 | *al = SSL_AD_DECODE_ERROR; |
2561 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2562 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2563 | return 0; | |
0f113f3e | 2564 | } |
56a26ce3 MC |
2565 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2566 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2567 | *al = SSL_AD_DECODE_ERROR; |
2568 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2569 | return 0; | |
0f113f3e | 2570 | } |
8cbfcc70 RS |
2571 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2572 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2573 | *al = SSL_AD_INTERNAL_ERROR; |
2574 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2575 | return 0; | |
0f113f3e | 2576 | } |
8cbfcc70 | 2577 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2578 | *al = SSL_AD_DECODE_ERROR; |
2579 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2580 | return 0; | |
ac63710a | 2581 | } |
8cbfcc70 | 2582 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2583 | |
2584 | return 1; | |
2585 | } | |
2faa1b48 | 2586 | |
f63e4288 MC |
2587 | |
2588 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2589 | { | |
2590 | int al; | |
2591 | ||
2592 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2593 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2594 | ossl_statem_set_error(s); | |
2595 | return MSG_PROCESS_ERROR; | |
2596 | } | |
2597 | ||
b9908bf9 | 2598 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2599 | } |
d02b48c6 | 2600 | |
7776a36c MC |
2601 | /* |
2602 | * Perform miscellaneous checks and processing after we have received the | |
2603 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2604 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2605 | * on failure. | |
7776a36c MC |
2606 | */ |
2607 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2608 | { |
a455d0f6 MC |
2609 | /* |
2610 | * at this point we check that we have the required stuff from | |
2611 | * the server | |
2612 | */ | |
2613 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2614 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2615 | return 0; | |
a455d0f6 MC |
2616 | } |
2617 | ||
bb1aaab4 | 2618 | /* |
aff8c126 RS |
2619 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2620 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2621 | * message, or NULL and -1 otherwise |
2622 | */ | |
aff8c126 RS |
2623 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2624 | && s->ctx->ext.status_cb != NULL) { | |
2625 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2626 | ||
bb1aaab4 | 2627 | if (ret == 0) { |
7776a36c MC |
2628 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2629 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2630 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2631 | return 0; |
bb1aaab4 MC |
2632 | } |
2633 | if (ret < 0) { | |
7776a36c MC |
2634 | *al = SSL_AD_INTERNAL_ERROR; |
2635 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2636 | ERR_R_MALLOC_FAILURE); | |
2637 | return 0; | |
bb1aaab4 MC |
2638 | } |
2639 | } | |
ed29e82a RP |
2640 | #ifndef OPENSSL_NO_CT |
2641 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2642 | /* Note we validate the SCTs whether or not we abort on error */ |
2643 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2644 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2645 | return 0; | |
ed29e82a RP |
2646 | } |
2647 | } | |
2648 | #endif | |
2649 | ||
7776a36c MC |
2650 | return 1; |
2651 | } | |
2652 | ||
2653 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2654 | { | |
2655 | int al = SSL_AD_INTERNAL_ERROR; | |
2656 | ||
2657 | if (PACKET_remaining(pkt) > 0) { | |
2658 | /* should contain no data */ | |
2659 | al = SSL_AD_DECODE_ERROR; | |
2660 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2661 | goto err; | |
2662 | } | |
2663 | #ifndef OPENSSL_NO_SRP | |
2664 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2665 | if (SRP_Calc_A_param(s) <= 0) { | |
2666 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2667 | goto err; | |
2668 | } | |
2669 | } | |
2670 | #endif | |
2671 | ||
2672 | /* | |
2673 | * Error queue messages are generated directly by this function | |
2674 | */ | |
2675 | if (!tls_process_initial_server_flight(s, &al)) | |
2676 | goto err; | |
2677 | ||
bd79bcb4 | 2678 | return MSG_PROCESS_FINISHED_READING; |
7776a36c MC |
2679 | |
2680 | err: | |
2681 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2682 | ossl_statem_set_error(s); | |
2683 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2684 | } |
176f31dd | 2685 | |
f1ec23c0 | 2686 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2687 | { |
7689082b | 2688 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2689 | int ret = 0; |
2690 | /* | |
2691 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2692 | * \0-terminated identity. The last byte is for us for simulating | |
2693 | * strnlen. | |
2694 | */ | |
2695 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2696 | size_t identitylen = 0; | |
2697 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2698 | unsigned char *tmppsk = NULL; | |
2699 | char *tmpidentity = NULL; | |
2700 | size_t psklen = 0; | |
2701 | ||
2702 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2703 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2704 | *al = SSL_AD_INTERNAL_ERROR; |
2705 | goto err; | |
2706 | } | |
d02b48c6 | 2707 | |
13c0ec4a | 2708 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2709 | |
13c0ec4a MC |
2710 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2711 | identity, sizeof(identity) - 1, | |
2712 | psk, sizeof(psk)); | |
7689082b | 2713 | |
13c0ec4a | 2714 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2715 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2716 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2717 | goto err; | |
2718 | } else if (psklen == 0) { | |
05ec6a25 | 2719 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2720 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2721 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2722 | goto err; | |
2723 | } | |
7689082b | 2724 | |
13c0ec4a MC |
2725 | identitylen = strlen(identity); |
2726 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2727 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2728 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2729 | goto err; | |
2730 | } | |
7689082b | 2731 | |
13c0ec4a MC |
2732 | tmppsk = OPENSSL_memdup(psk, psklen); |
2733 | tmpidentity = OPENSSL_strdup(identity); | |
2734 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2735 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2736 | *al = SSL_AD_INTERNAL_ERROR; |
2737 | goto err; | |
2738 | } | |
7689082b | 2739 | |
13c0ec4a MC |
2740 | OPENSSL_free(s->s3->tmp.psk); |
2741 | s->s3->tmp.psk = tmppsk; | |
2742 | s->s3->tmp.psklen = psklen; | |
2743 | tmppsk = NULL; | |
2744 | OPENSSL_free(s->session->psk_identity); | |
2745 | s->session->psk_identity = tmpidentity; | |
2746 | tmpidentity = NULL; | |
f1ec23c0 | 2747 | |
b2b3024e | 2748 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2749 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2750 | *al = SSL_AD_INTERNAL_ERROR; | |
2751 | goto err; | |
2752 | } | |
7689082b | 2753 | |
13c0ec4a | 2754 | ret = 1; |
0bce0b02 | 2755 | |
13c0ec4a MC |
2756 | err: |
2757 | OPENSSL_cleanse(psk, psklen); | |
2758 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2759 | OPENSSL_clear_free(tmppsk, psklen); | |
2760 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2761 | |
13c0ec4a MC |
2762 | return ret; |
2763 | #else | |
05ec6a25 | 2764 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2765 | *al = SSL_AD_INTERNAL_ERROR; |
2766 | return 0; | |
b9908bf9 | 2767 | #endif |
13c0ec4a | 2768 | } |
b9908bf9 | 2769 | |
f1ec23c0 | 2770 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2771 | { |
bc36ee62 | 2772 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2773 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2774 | EVP_PKEY *pkey = NULL; |
2775 | EVP_PKEY_CTX *pctx = NULL; | |
2776 | size_t enclen; | |
2777 | unsigned char *pms = NULL; | |
2778 | size_t pmslen = 0; | |
b9908bf9 | 2779 | |
13c0ec4a MC |
2780 | if (s->session->peer == NULL) { |
2781 | /* | |
2782 | * We should always have a server certificate with SSL_kRSA. | |
2783 | */ | |
05ec6a25 | 2784 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2785 | return 0; |
2786 | } | |
0f113f3e | 2787 | |
13c0ec4a MC |
2788 | pkey = X509_get0_pubkey(s->session->peer); |
2789 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2790 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2791 | return 0; |
2792 | } | |
0f113f3e | 2793 | |
13c0ec4a MC |
2794 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2795 | pms = OPENSSL_malloc(pmslen); | |
2796 | if (pms == NULL) { | |
05ec6a25 | 2797 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2798 | *al = SSL_AD_INTERNAL_ERROR; |
2799 | return 0; | |
2800 | } | |
0bce0b02 | 2801 | |
13c0ec4a MC |
2802 | pms[0] = s->client_version >> 8; |
2803 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2804 | /* TODO(size_t): Convert this function */ |
2805 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2806 | goto err; |
2807 | } | |
0f113f3e | 2808 | |
13c0ec4a | 2809 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2810 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2811 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2812 | goto err; | |
2813 | } | |
13c0ec4a MC |
2814 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2815 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2816 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2817 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2818 | goto err; |
2819 | } | |
f1ec23c0 MC |
2820 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2821 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2822 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2823 | goto err; |
2824 | } | |
13c0ec4a MC |
2825 | EVP_PKEY_CTX_free(pctx); |
2826 | pctx = NULL; | |
0f113f3e | 2827 | |
13c0ec4a | 2828 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2829 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2830 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2831 | goto err; | |
b9908bf9 | 2832 | } |
13c0ec4a | 2833 | |
2faa1b48 CB |
2834 | /* Log the premaster secret, if logging is enabled. */ |
2835 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2836 | goto err; | |
2837 | ||
26fb4b03 RS |
2838 | s->s3->tmp.pms = pms; |
2839 | s->s3->tmp.pmslen = pmslen; | |
2840 | ||
13c0ec4a MC |
2841 | return 1; |
2842 | err: | |
2843 | OPENSSL_clear_free(pms, pmslen); | |
2844 | EVP_PKEY_CTX_free(pctx); | |
2845 | ||
2846 | return 0; | |
2847 | #else | |
05ec6a25 | 2848 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2849 | *al = SSL_AD_INTERNAL_ERROR; |
2850 | return 0; | |
f9b3bff6 | 2851 | #endif |
13c0ec4a MC |
2852 | } |
2853 | ||
f1ec23c0 | 2854 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2855 | { |
2856 | #ifndef OPENSSL_NO_DH | |
2857 | DH *dh_clnt = NULL; | |
2858 | const BIGNUM *pub_key; | |
2859 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2860 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2861 | |
2862 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2863 | if (skey == NULL) |
2864 | goto err; | |
2865 | ||
0a699a07 | 2866 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2867 | if (ckey == NULL) |
2868 | goto err; | |
2869 | ||
a8c1c704 MC |
2870 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2871 | ||
0f1e51ea | 2872 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2873 | goto err; |
a8c1c704 MC |
2874 | |
2875 | /* send off the data */ | |
2876 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2877 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2878 | goto err; |
2879 | ||
2880 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2881 | EVP_PKEY_free(ckey); |
2882 | ||
2883 | return 1; | |
f1ec23c0 MC |
2884 | err: |
2885 | EVP_PKEY_free(ckey); | |
2886 | #endif | |
05ec6a25 | 2887 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2888 | *al = SSL_AD_INTERNAL_ERROR; |
2889 | return 0; | |
a8c1c704 MC |
2890 | } |
2891 | ||
f1ec23c0 | 2892 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2893 | { |
2894 | #ifndef OPENSSL_NO_EC | |
2895 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2896 | size_t encoded_pt_len = 0; |
67ad5aab | 2897 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2898 | int ret = 0; |
67ad5aab MC |
2899 | |
2900 | skey = s->s3->peer_tmp; | |
ec24630a | 2901 | if (skey == NULL) { |
05ec6a25 | 2902 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2903 | return 0; |
2904 | } | |
2905 | ||
0a699a07 | 2906 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2907 | if (ckey == NULL) { |
2908 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2909 | goto err; | |
2910 | } | |
67ad5aab | 2911 | |
0f1e51ea | 2912 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2913 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2914 | goto err; |
2915 | } | |
2916 | ||
2917 | /* Generate encoding of client key */ | |
ec24630a | 2918 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2919 | |
2920 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2921 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2922 | goto err; |
2923 | } | |
2924 | ||
b2b3024e | 2925 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2926 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2927 | goto err; | |
2928 | } | |
67ad5aab | 2929 | |
f1ec23c0 | 2930 | ret = 1; |
67ad5aab | 2931 | err: |
f1ec23c0 | 2932 | OPENSSL_free(encodedPoint); |
67ad5aab | 2933 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2934 | return ret; |
67ad5aab | 2935 | #else |
05ec6a25 | 2936 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2937 | *al = SSL_AD_INTERNAL_ERROR; |
2938 | return 0; | |
2939 | #endif | |
2940 | } | |
2941 | ||
f1ec23c0 | 2942 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2943 | { |
2944 | #ifndef OPENSSL_NO_GOST | |
2945 | /* GOST key exchange message creation */ | |
2946 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2947 | X509 *peer_cert; | |
2948 | size_t msglen; | |
2949 | unsigned int md_len; | |
2950 | unsigned char shared_ukm[32], tmp[256]; | |
2951 | EVP_MD_CTX *ukm_hash = NULL; | |
2952 | int dgst_nid = NID_id_GostR3411_94; | |
2953 | unsigned char *pms = NULL; | |
2954 | size_t pmslen = 0; | |
2955 | ||
2956 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2957 | dgst_nid = NID_id_GostR3411_2012_256; | |
2958 | ||
2959 | /* | |
1ee4b98e | 2960 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
2961 | */ |
2962 | peer_cert = s->session->peer; | |
2963 | if (!peer_cert) { | |
2964 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2965 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2966 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2967 | return 0; | |
2968 | } | |
2969 | ||
2970 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2971 | if (pkey_ctx == NULL) { | |
2972 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2973 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2974 | return 0; |
2975 | } | |
2976 | /* | |
2977 | * If we have send a certificate, and certificate key | |
2978 | * parameters match those of server certificate, use | |
2979 | * certificate key for key exchange | |
2980 | */ | |
2981 | ||
2982 | /* Otherwise, generate ephemeral key pair */ | |
2983 | pmslen = 32; | |
2984 | pms = OPENSSL_malloc(pmslen); | |
2985 | if (pms == NULL) { | |
2986 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2987 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2988 | goto err; |
e00e0b3d MC |
2989 | } |
2990 | ||
2991 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2992 | /* Generate session key |
2993 | * TODO(size_t): Convert this function | |
2994 | */ | |
2995 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2996 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2997 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2998 | goto err; |
2999 | }; | |
e00e0b3d MC |
3000 | /* |
3001 | * Compute shared IV and store it in algorithm-specific context | |
3002 | * data | |
3003 | */ | |
3004 | ukm_hash = EVP_MD_CTX_new(); | |
3005 | if (ukm_hash == NULL | |
a230b26e EK |
3006 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3007 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3008 | SSL3_RANDOM_SIZE) <= 0 | |
3009 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3010 | SSL3_RANDOM_SIZE) <= 0 | |
3011 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 3012 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 3013 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3014 | goto err; |
3015 | } | |
3016 | EVP_MD_CTX_free(ukm_hash); | |
3017 | ukm_hash = NULL; | |
3018 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3019 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
3020 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3021 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3022 | goto err; |
3023 | } | |
3024 | /* Make GOST keytransport blob message */ | |
3025 | /* | |
3026 | * Encapsulate it into sequence | |
3027 | */ | |
e00e0b3d MC |
3028 | msglen = 255; |
3029 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
3030 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3031 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3032 | goto err; |
3033 | } | |
f1ec23c0 | 3034 | |
08029dfa MC |
3035 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3036 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3037 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3038 | *al = SSL_AD_INTERNAL_ERROR; |
3039 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3040 | goto err; | |
e00e0b3d | 3041 | } |
f1ec23c0 | 3042 | |
e00e0b3d MC |
3043 | EVP_PKEY_CTX_free(pkey_ctx); |
3044 | s->s3->tmp.pms = pms; | |
3045 | s->s3->tmp.pmslen = pmslen; | |
3046 | ||
3047 | return 1; | |
3048 | err: | |
3049 | EVP_PKEY_CTX_free(pkey_ctx); | |
3050 | OPENSSL_clear_free(pms, pmslen); | |
3051 | EVP_MD_CTX_free(ukm_hash); | |
3052 | return 0; | |
3053 | #else | |
05ec6a25 | 3054 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3055 | *al = SSL_AD_INTERNAL_ERROR; |
3056 | return 0; | |
3057 | #endif | |
3058 | } | |
3059 | ||
f1ec23c0 | 3060 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3061 | { |
8b9546c7 | 3062 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3063 | unsigned char *abytes = NULL; |
3064 | ||
3065 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3066 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3067 | &abytes)) { | |
05ec6a25 | 3068 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3069 | return 0; |
3070 | } | |
f1ec23c0 MC |
3071 | BN_bn2bin(s->srp_ctx.A, abytes); |
3072 | ||
840a2bf8 MC |
3073 | OPENSSL_free(s->session->srp_username); |
3074 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3075 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3076 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3077 | return 0; |
3078 | } | |
3079 | ||
3080 | return 1; | |
3081 | #else | |
05ec6a25 | 3082 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3083 | *al = SSL_AD_INTERNAL_ERROR; |
3084 | return 0; | |
3085 | #endif | |
3086 | } | |
3087 | ||
7cea05dc | 3088 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3089 | { |
13c0ec4a MC |
3090 | unsigned long alg_k; |
3091 | int al = -1; | |
3092 | ||
f1ec23c0 | 3093 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3094 | |
13c0ec4a | 3095 | if ((alg_k & SSL_PSK) |
7cea05dc | 3096 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3097 | goto err; |
3098 | ||
f1ec23c0 | 3099 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3100 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3101 | goto err; |
a8c1c704 | 3102 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3103 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3104 | goto err; |
67ad5aab | 3105 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3106 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3107 | goto err; |
e00e0b3d | 3108 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3109 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3110 | goto err; |
840a2bf8 | 3111 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3112 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3113 | goto err; |
4a424545 | 3114 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3115 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3116 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3117 | goto err; | |
3118 | } | |
3119 | ||
b9908bf9 | 3120 | return 1; |
0f113f3e | 3121 | err: |
13c0ec4a MC |
3122 | if (al != -1) |
3123 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3124 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3125 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3126 | #ifndef OPENSSL_NO_PSK |
3127 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3128 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3129 | #endif |
b9908bf9 MC |
3130 | return 0; |
3131 | } | |
3132 | ||
3133 | int tls_client_key_exchange_post_work(SSL *s) | |
3134 | { | |
3135 | unsigned char *pms = NULL; | |
3136 | size_t pmslen = 0; | |
3137 | ||
6f137370 MC |
3138 | pms = s->s3->tmp.pms; |
3139 | pmslen = s->s3->tmp.pmslen; | |
3140 | ||
b9908bf9 MC |
3141 | #ifndef OPENSSL_NO_SRP |
3142 | /* Check for SRP */ | |
3143 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3144 | if (!srp_generate_client_master_secret(s)) { | |
3145 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3146 | ERR_R_INTERNAL_ERROR); | |
3147 | goto err; | |
3148 | } | |
3149 | return 1; | |
3150 | } | |
3151 | #endif | |
b9908bf9 MC |
3152 | |
3153 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3154 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3155 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3156 | goto err; | |
3157 | } | |
3158 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3159 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3160 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3161 | /* ssl_generate_master_secret frees the pms even on error */ |
3162 | pms = NULL; | |
3163 | pmslen = 0; | |
b9908bf9 MC |
3164 | goto err; |
3165 | } | |
6f137370 MC |
3166 | pms = NULL; |
3167 | pmslen = 0; | |
473483d4 MC |
3168 | |
3169 | #ifndef OPENSSL_NO_SCTP | |
3170 | if (SSL_IS_DTLS(s)) { | |
3171 | unsigned char sctpauthkey[64]; | |
3172 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3173 | ||
3174 | /* | |
3175 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3176 | * used. | |
3177 | */ | |
141eb8c6 MC |
3178 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3179 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3180 | |
3181 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3182 | sizeof(sctpauthkey), labelbuffer, |
3183 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3184 | goto err; |
3185 | ||
3186 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3187 | sizeof(sctpauthkey), sctpauthkey); | |
3188 | } | |
3189 | #endif | |
3190 | ||
b9908bf9 MC |
3191 | return 1; |
3192 | err: | |
3193 | OPENSSL_clear_free(pms, pmslen); | |
3194 | s->s3->tmp.pms = NULL; | |
3195 | return 0; | |
0f113f3e | 3196 | } |
d02b48c6 | 3197 | |
0f113f3e MC |
3198 | /* |
3199 | * Check a certificate can be used for client authentication. Currently check | |
3200 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3201 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3202 | */ |
3203 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3204 | { |
0f113f3e | 3205 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3206 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3207 | return 0; |
3208 | /* | |
3209 | * If strict mode check suitability of chain before using it. This also | |
3210 | * adjusts suite B digest if necessary. | |
3211 | */ | |
3212 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3213 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3214 | return 0; | |
0f113f3e MC |
3215 | return 1; |
3216 | } | |
0d609395 | 3217 | |
be3583fa | 3218 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3219 | { |
3220 | X509 *x509 = NULL; | |
3221 | EVP_PKEY *pkey = NULL; | |
3222 | int i; | |
3223 | ||
b9908bf9 | 3224 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3225 | /* Let cert callback update client certificates if required */ |
3226 | if (s->cert->cert_cb) { | |
3227 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3228 | if (i < 0) { | |
3229 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3230 | return WORK_MORE_A; |
0f113f3e MC |
3231 | } |
3232 | if (i == 0) { | |
3233 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3234 | ossl_statem_set_error(s); |
0f113f3e MC |
3235 | return 0; |
3236 | } | |
3237 | s->rwstate = SSL_NOTHING; | |
3238 | } | |
3239 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3240 | return WORK_FINISHED_CONTINUE; |
3241 | ||
3242 | /* Fall through to WORK_MORE_B */ | |
3243 | wst = WORK_MORE_B; | |
0f113f3e MC |
3244 | } |
3245 | ||
3246 | /* We need to get a client cert */ | |
b9908bf9 | 3247 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3248 | /* |
3249 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3250 | * return(-1); We then get retied later | |
3251 | */ | |
0f113f3e MC |
3252 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3253 | if (i < 0) { | |
3254 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3255 | return WORK_MORE_B; |
0f113f3e MC |
3256 | } |
3257 | s->rwstate = SSL_NOTHING; | |
3258 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3259 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3260 | i = 0; | |
3261 | } else if (i == 1) { | |
3262 | i = 0; | |
b9908bf9 | 3263 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3264 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3265 | } | |
3266 | ||
222561fe | 3267 | X509_free(x509); |
25aaa98a | 3268 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3269 | if (i && !ssl3_check_client_certificate(s)) |
3270 | i = 0; | |
3271 | if (i == 0) { | |
3272 | if (s->version == SSL3_VERSION) { | |
3273 | s->s3->tmp.cert_req = 0; | |
3274 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3275 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3276 | } else { |
3277 | s->s3->tmp.cert_req = 2; | |
124037fd | 3278 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3279 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3280 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3281 | return 0; |
3282 | } | |
0f113f3e MC |
3283 | } |
3284 | } | |
3285 | ||
b9908bf9 | 3286 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3287 | } |
3288 | ||
b9908bf9 MC |
3289 | /* Shouldn't ever get here */ |
3290 | return WORK_ERROR; | |
3291 | } | |
3292 | ||
7cea05dc | 3293 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3294 | { |
0baed5e9 | 3295 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3296 | |
3297 | /* | |
3298 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3299 | * later | |
3300 | */ | |
3301 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3302 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3303 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3304 | : s->cert->key, |
3305 | &al)) { | |
b9908bf9 | 3306 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
f7e393be MC |
3307 | goto err; |
3308 | } | |
3309 | ||
3310 | if (SSL_IS_TLS13(s) | |
3311 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3312 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3313 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3314 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, | |
3315 | SSL_R_CANNOT_CHANGE_CIPHER); | |
3316 | goto err; | |
0f113f3e | 3317 | } |
b9908bf9 MC |
3318 | |
3319 | return 1; | |
f7e393be MC |
3320 | err: |
3321 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3322 | return 0; | |
0f113f3e MC |
3323 | } |
3324 | ||
3325 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3326 | |
36d16f8e | 3327 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3328 | { |
60f43e9e RL |
3329 | int i; |
3330 | #ifndef OPENSSL_NO_EC | |
3331 | int idx; | |
3332 | #endif | |
0f113f3e MC |
3333 | long alg_k, alg_a; |
3334 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3335 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3336 | |
0f113f3e MC |
3337 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3338 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3339 | |
0f113f3e | 3340 | /* we don't have a certificate */ |
55a9a16f | 3341 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3342 | return (1); |
d02b48c6 | 3343 | |
0f113f3e | 3344 | /* This is the passed certificate */ |
d02b48c6 | 3345 | |
10bf4fc2 | 3346 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3347 | idx = s->session->peer_type; |
0f113f3e | 3348 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3349 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3350 | /* check failed */ |
3351 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3352 | goto f_err; | |
3353 | } else { | |
3354 | return 1; | |
3355 | } | |
3356 | } else if (alg_a & SSL_aECDSA) { | |
3357 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3358 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3359 | goto f_err; | |
0f113f3e MC |
3360 | } |
3361 | #endif | |
8382fd3a | 3362 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3363 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3364 | |
3365 | /* Check that we have a certificate if we require one */ | |
3366 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3367 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3368 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3369 | goto f_err; | |
3370 | } | |
bc36ee62 | 3371 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3372 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3373 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3374 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3375 | goto f_err; | |
3376 | } | |
d02b48c6 | 3377 | #endif |
bc36ee62 | 3378 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3379 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3380 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3381 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3382 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3383 | goto f_err; | |
0f113f3e | 3384 | } |
79df9d62 | 3385 | #endif |
bc36ee62 | 3386 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3387 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3388 | al = SSL_AD_INTERNAL_ERROR; |
3389 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3390 | goto f_err; |
0f113f3e | 3391 | } |
d02b48c6 RE |
3392 | #endif |
3393 | ||
0f113f3e MC |
3394 | return (1); |
3395 | f_err: | |
26c79d56 | 3396 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3397 | return (0); |
3398 | } | |
3399 | ||
e481f9b9 | 3400 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3401 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3402 | { |
15e6be6c MC |
3403 | size_t len, padding_len; |
3404 | unsigned char *padding = NULL; | |
15e6be6c | 3405 | |
aff8c126 | 3406 | len = s->ext.npn_len; |
b9908bf9 | 3407 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3408 | |
aff8c126 | 3409 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3410 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3411 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3412 | goto err; | |
3413 | } | |
3414 | ||
3415 | memset(padding, 0, padding_len); | |
3416 | ||
b9908bf9 | 3417 | return 1; |
15e6be6c | 3418 | err: |
15e6be6c MC |
3419 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3420 | return 0; | |
b9908bf9 | 3421 | } |
6434abbf | 3422 | #endif |
368888bc | 3423 | |
c7f47786 MC |
3424 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3425 | { | |
3426 | if (PACKET_remaining(pkt) > 0) { | |
3427 | /* should contain no data */ | |
3428 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3429 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3430 | ossl_statem_set_error(s); | |
3431 | return MSG_PROCESS_ERROR; | |
3432 | } | |
3433 | ||
3434 | /* | |
1f04f23e MC |
3435 | * This is a historical discrepancy (not in the RFC) maintained for |
3436 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3437 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3438 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3439 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3440 | */ |
3441 | if (SSL_IS_DTLS(s)) | |
3442 | SSL_renegotiate(s); | |
3443 | else | |
3444 | SSL_renegotiate_abbreviated(s); | |
3445 | ||
3446 | return MSG_PROCESS_FINISHED_READING; | |
3447 | } | |
3448 | ||
e46f2334 MC |
3449 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3450 | { | |
3451 | int al = SSL_AD_INTERNAL_ERROR; | |
3452 | PACKET extensions; | |
3434f40b | 3453 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3454 | |
e46f2334 MC |
3455 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3456 | al = SSL_AD_DECODE_ERROR; | |
3457 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3458 | goto err; | |
3459 | } | |
3460 | ||
fe874d27 MC |
3461 | if (!tls_collect_extensions(s, &extensions, |
3462 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
3463 | &al, NULL) | |
3464 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
f97d4c37 | 3465 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3466 | goto err; |
3467 | ||
1b0286a3 | 3468 | OPENSSL_free(rawexts); |
e46f2334 MC |
3469 | return MSG_PROCESS_CONTINUE_READING; |
3470 | ||
3471 | err: | |
3472 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3473 | ossl_statem_set_error(s); | |
1b0286a3 | 3474 | OPENSSL_free(rawexts); |
e46f2334 MC |
3475 | return MSG_PROCESS_ERROR; |
3476 | } | |
3477 | ||
368888bc | 3478 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3479 | { |
3480 | int i = 0; | |
368888bc | 3481 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3482 | if (s->ctx->client_cert_engine) { |
3483 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3484 | SSL_get_client_CA_list(s), | |
3485 | px509, ppkey, NULL, NULL, NULL); | |
3486 | if (i != 0) | |
3487 | return i; | |
3488 | } | |
3489 | #endif | |
3490 | if (s->ctx->client_cert_cb) | |
3491 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3492 | return i; | |
3493 | } | |
d45ba43d | 3494 | |
ae2f7b37 | 3495 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3496 | { |
2c7b4dbc | 3497 | int i; |
aafec89c | 3498 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d MC |
3499 | int empty_reneg_info_scsv = !s->renegotiate; |
3500 | /* Set disabled masks for this session */ | |
3501 | ssl_set_client_disabled(s); | |
3502 | ||
3503 | if (sk == NULL) | |
3504 | return (0); | |
d45ba43d | 3505 | |
2c7b4dbc MC |
3506 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3507 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3508 | # error Max cipher length too short | |
3509 | # endif | |
3510 | /* | |
3511 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3512 | * chop number of supported ciphers to keep it well below this if we | |
3513 | * use TLS v1.2 | |
3514 | */ | |
3515 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3516 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3517 | else | |
3518 | #endif | |
3519 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3520 | maxlen = 0xfffe; | |
3521 | ||
3522 | if (empty_reneg_info_scsv) | |
3523 | maxlen -= 2; | |
3524 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3525 | maxlen -= 2; | |
3526 | ||
3527 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3528 | const SSL_CIPHER *c; | |
3529 | ||
d45ba43d MC |
3530 | c = sk_SSL_CIPHER_value(sk, i); |
3531 | /* Skip disabled ciphers */ | |
8af91fd9 | 3532 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3533 | continue; |
2c7b4dbc MC |
3534 | |
3535 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3536 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3537 | return 0; | |
3538 | } | |
3539 | ||
aafec89c MC |
3540 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3541 | if (!maxverok) { | |
3542 | if (SSL_IS_DTLS(s)) { | |
3543 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3544 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3545 | maxverok = 1; | |
3546 | } else { | |
3547 | if (c->max_tls >= s->s3->tmp.max_ver | |
3548 | && c->min_tls <= s->s3->tmp.max_ver) | |
3549 | maxverok = 1; | |
3550 | } | |
3551 | } | |
3552 | ||
2c7b4dbc | 3553 | totlen += len; |
d45ba43d | 3554 | } |
2c7b4dbc | 3555 | |
aafec89c | 3556 | if (totlen == 0 || !maxverok) { |
2c7b4dbc | 3557 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); |
aafec89c MC |
3558 | |
3559 | if (!maxverok) | |
3560 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3561 | "SSL/TLS version"); | |
3562 | ||
2c7b4dbc MC |
3563 | return 0; |
3564 | } | |
3565 | ||
3566 | if (totlen != 0) { | |
d45ba43d MC |
3567 | if (empty_reneg_info_scsv) { |
3568 | static SSL_CIPHER scsv = { | |
3569 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3570 | }; | |
2c7b4dbc MC |
3571 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3572 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3573 | return 0; | |
3574 | } | |
d45ba43d MC |
3575 | } |
3576 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3577 | static SSL_CIPHER scsv = { | |
3578 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3579 | }; | |
2c7b4dbc MC |
3580 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3581 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3582 | return 0; | |
3583 | } | |
d45ba43d MC |
3584 | } |
3585 | } | |
3586 | ||
2c7b4dbc | 3587 | return 1; |
d45ba43d | 3588 | } |
ef6c191b MC |
3589 | |
3590 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3591 | { | |
3592 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3593 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
3594 | SSLerr(SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3595 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3596 | return 0; | |
3597 | } | |
3598 | ||
3599 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3600 | return 1; | |
3601 | } |