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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); | |
1025 | ||
61ae935a MC |
1026 | #ifndef OPENSSL_NO_SCTP |
1027 | case TLS_ST_CR_SRVR_DONE: | |
1028 | /* We only get here if we are using SCTP and we are renegotiating */ | |
1029 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
1030 | s->s3->in_read_app_data = 2; | |
1031 | s->rwstate = SSL_READING; | |
1032 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
1033 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 1034 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
1035 | return WORK_MORE_A; |
1036 | } | |
fe3a3291 | 1037 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
1038 | return WORK_FINISHED_STOP; |
1039 | #endif | |
61ae935a | 1040 | } |
61ae935a MC |
1041 | } |
1042 | ||
7cea05dc | 1043 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1044 | { |
2c7b4dbc | 1045 | unsigned char *p; |
ec60ccc1 MC |
1046 | size_t sess_id_len; |
1047 | int i, protverr; | |
2c7b4dbc | 1048 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 1049 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1050 | SSL_COMP *comp; |
1051 | #endif | |
b9908bf9 | 1052 | SSL_SESSION *sess = s->session; |
0f113f3e | 1053 | |
7cea05dc | 1054 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1055 | /* Should not happen */ |
1056 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1057 | return 0; |
2c7b4dbc | 1058 | } |
0f113f3e | 1059 | |
b9908bf9 | 1060 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1061 | protverr = ssl_set_client_hello_version(s); |
1062 | if (protverr != 0) { | |
1063 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1064 | return 0; |
4fa52141 | 1065 | } |
0f113f3e | 1066 | |
a230b26e | 1067 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 1068 | /* |
b9908bf9 MC |
1069 | * In the case of EAP-FAST, we can have a pre-shared |
1070 | * "ticket" without a session ID. | |
0f113f3e | 1071 | */ |
aff8c126 | 1072 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
1073 | (sess->not_resumable)) { |
1074 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1075 | return 0; |
b9908bf9 MC |
1076 | } |
1077 | /* else use the pre-loaded session */ | |
0f113f3e | 1078 | |
b9908bf9 | 1079 | p = s->s3->client_random; |
0f113f3e | 1080 | |
b9908bf9 MC |
1081 | /* |
1082 | * for DTLS if client_random is initialized, reuse it, we are | |
1083 | * required to use same upon reply to HelloVerify | |
1084 | */ | |
1085 | if (SSL_IS_DTLS(s)) { | |
1086 | size_t idx; | |
1087 | i = 1; | |
1088 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1089 | if (p[idx]) { | |
1090 | i = 0; | |
1091 | break; | |
0f113f3e | 1092 | } |
0f113f3e | 1093 | } |
b9908bf9 MC |
1094 | } else |
1095 | i = 1; | |
0f113f3e | 1096 | |
f7f2a01d MC |
1097 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
1098 | DOWNGRADE_NONE) <= 0) | |
7cea05dc | 1099 | return 0; |
b9908bf9 | 1100 | |
b9908bf9 MC |
1101 | /*- |
1102 | * version indicates the negotiated version: for example from | |
1103 | * an SSLv2/v3 compatible client hello). The client_version | |
1104 | * field is the maximum version we permit and it is also | |
1105 | * used in RSA encrypted premaster secrets. Some servers can | |
1106 | * choke if we initially report a higher version then | |
1107 | * renegotiate to a lower one in the premaster secret. This | |
1108 | * didn't happen with TLS 1.0 as most servers supported it | |
1109 | * but it can with TLS 1.1 or later if the server only supports | |
1110 | * 1.0. | |
1111 | * | |
1112 | * Possible scenario with previous logic: | |
1113 | * 1. Client hello indicates TLS 1.2 | |
1114 | * 2. Server hello says TLS 1.0 | |
1115 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1116 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1117 | * 5. Server sends hello request to renegotiate. |
1118 | * 6. Client hello indicates TLS v1.0 as we now | |
1119 | * know that is maximum server supports. | |
1120 | * 7. Server chokes on RSA encrypted premaster secret | |
1121 | * containing version 1.0. | |
1122 | * | |
1123 | * For interoperability it should be OK to always use the | |
1124 | * maximum version we support in client hello and then rely | |
1125 | * on the checking of version to ensure the servers isn't | |
1126 | * being inconsistent: for example initially negotiating with | |
1127 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1128 | * client_version in client hello and not resetting it to | |
1129 | * the negotiated version. | |
cd998837 MC |
1130 | * |
1131 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1132 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1133 | */ |
7acb8b64 | 1134 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1135 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1136 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1137 | return 0; |
2c7b4dbc | 1138 | } |
b9908bf9 MC |
1139 | |
1140 | /* Session ID */ | |
f05bcf0f | 1141 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1142 | sess_id_len = 0; |
b9908bf9 | 1143 | else |
ec60ccc1 MC |
1144 | sess_id_len = s->session->session_id_length; |
1145 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1146 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1147 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1148 | sess_id_len)) | |
7cea05dc | 1149 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1150 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1151 | return 0; |
b9908bf9 | 1152 | } |
0f113f3e | 1153 | |
b9908bf9 MC |
1154 | /* cookie stuff for DTLS */ |
1155 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1156 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1157 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1158 | s->d1->cookie_len)) { |
b9908bf9 | 1159 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1160 | return 0; |
0f113f3e | 1161 | } |
b9908bf9 MC |
1162 | } |
1163 | ||
1164 | /* Ciphers supported */ | |
7cea05dc | 1165 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1166 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1167 | return 0; |
2c7b4dbc MC |
1168 | } |
1169 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1170 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1171 | return 0; | |
1172 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1173 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1174 | return 0; |
b9908bf9 | 1175 | } |
0f113f3e | 1176 | |
b9908bf9 | 1177 | /* COMPRESSION */ |
7cea05dc | 1178 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1179 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1180 | return 0; |
2c7b4dbc MC |
1181 | } |
1182 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1183 | if (ssl_allow_compression(s) |
1184 | && s->ctx->comp_methods | |
1185 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1186 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1187 | for (i = 0; i < compnum; i++) { | |
1188 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1189 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1190 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1191 | return 0; |
2c7b4dbc MC |
1192 | } |
1193 | } | |
b9908bf9 | 1194 | } |
09b6c2ef | 1195 | #endif |
2c7b4dbc | 1196 | /* Add the NULL method */ |
7cea05dc | 1197 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1198 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1199 | return 0; |
2c7b4dbc | 1200 | } |
761772d7 | 1201 | |
b9908bf9 | 1202 | /* TLS extensions */ |
fe874d27 | 1203 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1204 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1205 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1206 | return 0; |
b9908bf9 | 1207 | } |
0f113f3e | 1208 | |
b9908bf9 | 1209 | return 1; |
0f113f3e | 1210 | } |
d02b48c6 | 1211 | |
be3583fa | 1212 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1213 | { |
1214 | int al; | |
cb150cbc | 1215 | size_t cookie_len; |
8ba708e5 MC |
1216 | PACKET cookiepkt; |
1217 | ||
1218 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1219 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1220 | al = SSL_AD_DECODE_ERROR; |
1221 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1222 | goto f_err; | |
1223 | } | |
1224 | ||
1225 | cookie_len = PACKET_remaining(&cookiepkt); | |
1226 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1227 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1228 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1229 | goto f_err; | |
1230 | } | |
1231 | ||
1232 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1233 | al = SSL_AD_DECODE_ERROR; | |
1234 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1235 | goto f_err; | |
1236 | } | |
1237 | s->d1->cookie_len = cookie_len; | |
1238 | ||
1239 | return MSG_PROCESS_FINISHED_READING; | |
1240 | f_err: | |
1241 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1242 | ossl_statem_set_error(s); |
8ba708e5 MC |
1243 | return MSG_PROCESS_ERROR; |
1244 | } | |
1245 | ||
11c67eea | 1246 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1247 | { |
1248 | STACK_OF(SSL_CIPHER) *sk; | |
1249 | const SSL_CIPHER *c; | |
11c67eea MC |
1250 | int i; |
1251 | ||
1252 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1253 | if (c == NULL) { | |
1254 | /* unknown cipher */ | |
1255 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_UNKNOWN_CIPHER_RETURNED); | |
1256 | return 0; | |
1257 | } | |
1258 | /* | |
1259 | * If it is a disabled cipher we either didn't send it in client hello, | |
1260 | * or it's not allowed for the selected protocol. So we return an error. | |
1261 | */ | |
1262 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1263 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | sk = ssl_get_ciphers_by_id(s); | |
1268 | i = sk_SSL_CIPHER_find(sk, c); | |
1269 | if (i < 0) { | |
1270 | /* we did not say we would use this cipher */ | |
1271 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1276 | && s->s3->tmp.new_cipher->id != c->id) { | |
1277 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
1278 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Depending on the session caching (internal/external), the cipher | |
1284 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1285 | * set and use it for comparison. | |
1286 | */ | |
1287 | if (s->session->cipher != NULL) | |
1288 | s->session->cipher_id = s->session->cipher->id; | |
1289 | if (s->hit && (s->session->cipher_id != c->id)) { | |
1290 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, | |
1291 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
1292 | return 0; | |
1293 | } | |
1294 | s->s3->tmp.new_cipher = c; | |
1295 | ||
1296 | return 1; | |
1297 | } | |
1298 | ||
1299 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1300 | { | |
332eb390 | 1301 | PACKET session_id, extpkt; |
b9908bf9 | 1302 | size_t session_id_len; |
b6981744 | 1303 | const unsigned char *cipherchars; |
11c67eea | 1304 | int al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1305 | unsigned int compression; |
4fa52141 | 1306 | unsigned int sversion; |
3434f40b | 1307 | unsigned int context; |
4fa52141 | 1308 | int protverr; |
332eb390 | 1309 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1310 | #ifndef OPENSSL_NO_COMP |
1311 | SSL_COMP *comp; | |
1312 | #endif | |
1313 | ||
4fa52141 VD |
1314 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1315 | al = SSL_AD_DECODE_ERROR; | |
1316 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1317 | goto f_err; | |
1318 | } | |
50932c4a | 1319 | |
c3043dcd MC |
1320 | /* load the server random */ |
1321 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
1322 | al = SSL_AD_DECODE_ERROR; | |
1323 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1324 | goto f_err; | |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * We do this immediately so we know what format the ServerHello is in. | |
1329 | * Must be done after reading the random data so we can check for the | |
1330 | * TLSv1.3 downgrade sentinels | |
1331 | */ | |
1332 | protverr = ssl_choose_client_version(s, sversion, 1, &al); | |
4fa52141 | 1333 | if (protverr != 0) { |
4fa52141 VD |
1334 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); |
1335 | goto f_err; | |
0f113f3e | 1336 | } |
0f113f3e | 1337 | |
524420d8 MC |
1338 | /* |
1339 | * In TLSv1.3 a ServerHello message signals a key change so the end of the | |
1340 | * message must be on a record boundary. | |
1341 | */ | |
1342 | if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1343 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1344 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1345 | goto f_err; | |
1346 | } | |
1347 | ||
fc5ce51d | 1348 | /* Get the session-id. */ |
71728dd8 MC |
1349 | if (!SSL_IS_TLS13(s)) { |
1350 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1351 | al = SSL_AD_DECODE_ERROR; | |
1352 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1353 | goto f_err; | |
1354 | } | |
1355 | session_id_len = PACKET_remaining(&session_id); | |
1356 | if (session_id_len > sizeof s->session->session_id | |
1357 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1358 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1359 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1360 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1361 | goto f_err; | |
1362 | } | |
1363 | } else { | |
625b0d51 | 1364 | PACKET_null_init(&session_id); |
71728dd8 | 1365 | session_id_len = 0; |
0f113f3e | 1366 | } |
e481f9b9 | 1367 | |
73999b62 | 1368 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1369 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1370 | al = SSL_AD_DECODE_ERROR; |
1371 | goto f_err; | |
1372 | } | |
1373 | ||
4ff65f77 MC |
1374 | if (!SSL_IS_TLS13(s)) { |
1375 | if (!PACKET_get_1(pkt, &compression)) { | |
1376 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1377 | al = SSL_AD_DECODE_ERROR; | |
1378 | goto f_err; | |
1379 | } | |
1380 | } else { | |
1381 | compression = 0; | |
1382 | } | |
1383 | ||
1384 | /* TLS extensions */ | |
1385 | if (PACKET_remaining(pkt) == 0) { | |
1386 | PACKET_null_init(&extpkt); | |
1387 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1388 | al = SSL_AD_DECODE_ERROR; | |
1389 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1390 | goto f_err; | |
1391 | } | |
1392 | ||
fe874d27 MC |
1393 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1394 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1395 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1396 | goto f_err; |
1397 | ||
1398 | s->hit = 0; | |
1399 | ||
1400 | if (SSL_IS_TLS13(s)) { | |
1401 | /* This will set s->hit if we are resuming */ | |
1402 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1403 | SSL_EXT_TLS1_3_SERVER_HELLO, |
4ff65f77 MC |
1404 | extensions, NULL, 0, &al)) |
1405 | goto f_err; | |
1406 | } else { | |
8c1a5343 | 1407 | /* |
4ff65f77 MC |
1408 | * Check if we can resume the session based on external pre-shared |
1409 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1410 | * Resumption based on server-side state works with session IDs. | |
1411 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1412 | * works by overriding the SessionTicket extension at the application | |
1413 | * layer, and does not send a session ID. (We do not know whether | |
1414 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1415 | * ID alone is not a reliable indicator of session resumption, so we | |
1416 | * first check if we can resume, and later peek at the next handshake | |
1417 | * message to see if the server wants to resume. | |
8c1a5343 | 1418 | */ |
4ff65f77 MC |
1419 | if (s->version >= TLS1_VERSION |
1420 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1421 | const SSL_CIPHER *pref_cipher = NULL; | |
1422 | /* | |
1423 | * s->session->master_key_length is a size_t, but this is an int for | |
1424 | * backwards compat reasons | |
1425 | */ | |
1426 | int master_key_length; | |
1427 | master_key_length = sizeof(s->session->master_key); | |
1428 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1429 | &master_key_length, | |
1430 | NULL, &pref_cipher, | |
1431 | s->ext.session_secret_cb_arg) | |
1432 | && master_key_length > 0) { | |
1433 | s->session->master_key_length = master_key_length; | |
1434 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1435 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1436 | } else { |
1437 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1438 | al = SSL_AD_INTERNAL_ERROR; | |
1439 | goto f_err; | |
1440 | } | |
0f113f3e | 1441 | } |
4ff65f77 MC |
1442 | |
1443 | if (session_id_len != 0 | |
1444 | && session_id_len == s->session->session_id_length | |
1445 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1446 | session_id_len) == 0) | |
1447 | s->hit = 1; | |
50932c4a MC |
1448 | } |
1449 | ||
4ff65f77 | 1450 | if (s->hit) { |
0f113f3e | 1451 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1452 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1453 | /* actually a client application bug */ |
1454 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1455 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1456 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1457 | goto f_err; | |
1458 | } | |
6e3d0153 | 1459 | } else { |
0f113f3e | 1460 | /* |
6e3d0153 | 1461 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1462 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1463 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1464 | * so the PAC-based session secret is always preserved. It'll be | |
1465 | * overwritten if the server refuses resumption. | |
0f113f3e | 1466 | */ |
4ff65f77 MC |
1467 | if (s->session->session_id_length > 0 |
1468 | || (SSL_IS_TLS13(s) | |
1469 | && s->session->ext.tick_identity | |
1470 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1471 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1472 | if (!ssl_get_new_session(s, 0)) { |
1473 | goto f_err; | |
1474 | } | |
1475 | } | |
50932c4a | 1476 | |
ccae4a15 | 1477 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1478 | s->session->session_id_length = session_id_len; |
1479 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1480 | if (session_id_len > 0) |
1481 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1482 | session_id_len); | |
0f113f3e | 1483 | } |
fc5ce51d | 1484 | |
ccae4a15 FI |
1485 | /* Session version and negotiated protocol version should match */ |
1486 | if (s->version != s->session->ssl_version) { | |
1487 | al = SSL_AD_PROTOCOL_VERSION; | |
1488 | ||
1489 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1490 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1491 | goto f_err; | |
1492 | } | |
0f113f3e | 1493 | /* |
3eb2aff4 KR |
1494 | * Now that we know the version, update the check to see if it's an allowed |
1495 | * version. | |
1496 | */ | |
1497 | s->s3->tmp.min_ver = s->version; | |
1498 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1499 | |
11c67eea | 1500 | if (!set_client_ciphersuite(s, cipherchars)) { |
0f113f3e | 1501 | al = SSL_AD_ILLEGAL_PARAMETER; |
0f113f3e MC |
1502 | goto f_err; |
1503 | } | |
1504 | ||
09b6c2ef | 1505 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1506 | if (compression != 0) { |
0f113f3e | 1507 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1508 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1509 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1510 | goto f_err; | |
1511 | } | |
1512 | /* | |
1513 | * If compression is disabled we'd better not try to resume a session | |
1514 | * using compression. | |
1515 | */ | |
1516 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1517 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1518 | goto f_err; |
1519 | } | |
09b6c2ef | 1520 | #else |
fc5ce51d | 1521 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1522 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1523 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1524 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1525 | goto f_err; | |
1526 | } | |
fc5ce51d | 1527 | if (compression == 0) |
0f113f3e MC |
1528 | comp = NULL; |
1529 | else if (!ssl_allow_compression(s)) { | |
1530 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1531 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1532 | goto f_err; |
fc5ce51d EK |
1533 | } else { |
1534 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1535 | } | |
0f113f3e | 1536 | |
fc5ce51d | 1537 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1538 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1539 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1540 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1541 | goto f_err; | |
1542 | } else { | |
1543 | s->s3->tmp.new_compression = comp; | |
1544 | } | |
09b6c2ef | 1545 | #endif |
761772d7 | 1546 | |
4ff65f77 | 1547 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1548 | goto f_err; |
1549 | ||
8723588e MC |
1550 | #ifndef OPENSSL_NO_SCTP |
1551 | if (SSL_IS_DTLS(s) && s->hit) { | |
1552 | unsigned char sctpauthkey[64]; | |
1553 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1554 | ||
1555 | /* | |
1556 | * Add new shared key for SCTP-Auth, will be ignored if | |
1557 | * no SCTP used. | |
1558 | */ | |
141eb8c6 MC |
1559 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1560 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1561 | |
1562 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1563 | sizeof(sctpauthkey), |
1564 | labelbuffer, | |
1565 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1566 | goto f_err; |
8723588e MC |
1567 | |
1568 | BIO_ctrl(SSL_get_wbio(s), | |
1569 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1570 | sizeof(sctpauthkey), sctpauthkey); | |
1571 | } | |
1572 | #endif | |
1573 | ||
92760c21 MC |
1574 | /* |
1575 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1576 | * we're done with this message | |
1577 | */ | |
1578 | if (SSL_IS_TLS13(s) | |
1579 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1580 | || !s->method->ssl3_enc->change_cipher_state(s, |
1581 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1582 | al = SSL_AD_INTERNAL_ERROR; | |
1583 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1584 | goto f_err; | |
1585 | } | |
1586 | ||
1b0286a3 | 1587 | OPENSSL_free(extensions); |
b9908bf9 | 1588 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1589 | f_err: |
1590 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1591 | ossl_statem_set_error(s); |
1b0286a3 | 1592 | OPENSSL_free(extensions); |
b9908bf9 | 1593 | return MSG_PROCESS_ERROR; |
0f113f3e | 1594 | } |
d02b48c6 | 1595 | |
3847d426 MC |
1596 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1597 | { | |
1598 | unsigned int sversion; | |
2248dbeb | 1599 | int errorcode; |
11c67eea | 1600 | const unsigned char *cipherchars; |
3847d426 MC |
1601 | RAW_EXTENSION *extensions = NULL; |
1602 | int al; | |
1603 | PACKET extpkt; | |
1604 | ||
1605 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1606 | al = SSL_AD_DECODE_ERROR; | |
1607 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1608 | goto f_err; | |
1609 | } | |
1610 | ||
1611 | s->hello_retry_request = 1; | |
1612 | ||
1613 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
c3043dcd | 1614 | errorcode = ssl_choose_client_version(s, sversion, 0, &al); |
2248dbeb | 1615 | if (errorcode != 0) { |
2248dbeb | 1616 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1617 | goto f_err; |
1618 | } | |
1619 | ||
11c67eea MC |
1620 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
1621 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1622 | al = SSL_AD_DECODE_ERROR; | |
1623 | goto f_err; | |
1624 | } | |
1625 | ||
1626 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1627 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1628 | goto f_err; | |
1629 | } | |
1630 | ||
3847d426 MC |
1631 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { |
1632 | al = SSL_AD_DECODE_ERROR; | |
1633 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1634 | goto f_err; | |
1635 | } | |
1636 | ||
fe874d27 | 1637 | if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
fc5ece2e | 1638 | &extensions, &al, NULL) |
fe874d27 | 1639 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
3847d426 MC |
1640 | extensions, NULL, 0, &al)) |
1641 | goto f_err; | |
1642 | ||
1643 | OPENSSL_free(extensions); | |
1644 | ||
11c67eea MC |
1645 | /* |
1646 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1647 | * a synthetic message_hash in place of ClientHello1. | |
1648 | */ | |
1649 | if (!create_synthetic_message_hash(s)) { | |
1650 | al = SSL_AD_INTERNAL_ERROR; | |
1651 | goto f_err; | |
1652 | } | |
1653 | ||
1654 | /* | |
1655 | * Add this message to the Transcript Hash. Normally this is done | |
1656 | * automatically prior to the message processing stage. However due to the | |
1657 | * need to create the synthetic message hash, we defer that step until now | |
1658 | * for HRR messages. | |
1659 | */ | |
1660 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1661 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
1662 | al = SSL_AD_INTERNAL_ERROR; | |
1663 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); | |
1664 | goto f_err; | |
1665 | } | |
1666 | ||
3847d426 MC |
1667 | return MSG_PROCESS_FINISHED_READING; |
1668 | f_err: | |
1669 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1670 | ossl_statem_set_error(s); | |
1671 | OPENSSL_free(extensions); | |
1672 | return MSG_PROCESS_ERROR; | |
1673 | } | |
1674 | ||
be3583fa | 1675 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1676 | { |
1677 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1678 | unsigned long cert_list_len, cert_len; | |
1679 | X509 *x = NULL; | |
b6981744 | 1680 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1681 | STACK_OF(X509) *sk = NULL; |
1682 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1683 | size_t chainidx; |
e96e0f8e | 1684 | unsigned int context = 0; |
0f113f3e MC |
1685 | |
1686 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1687 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1688 | goto err; |
0f113f3e MC |
1689 | } |
1690 | ||
e96e0f8e MC |
1691 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1692 | || context != 0 | |
1693 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1694 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1695 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1696 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1697 | goto f_err; |
1698 | } | |
d805a57b | 1699 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1700 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1701 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1702 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1703 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1704 | SSL_R_CERT_LENGTH_MISMATCH); |
1705 | goto f_err; | |
1706 | } | |
1707 | ||
df758a85 MC |
1708 | certstart = certbytes; |
1709 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1710 | if (x == NULL) { |
1711 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1712 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1713 | goto f_err; |
1714 | } | |
df758a85 | 1715 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1716 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1717 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1718 | SSL_R_CERT_LENGTH_MISMATCH); |
1719 | goto f_err; | |
1720 | } | |
e96e0f8e MC |
1721 | |
1722 | if (SSL_IS_TLS13(s)) { | |
1723 | RAW_EXTENSION *rawexts = NULL; | |
1724 | PACKET extensions; | |
1725 | ||
1726 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1727 | al = SSL_AD_DECODE_ERROR; | |
1728 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1729 | goto f_err; | |
1730 | } | |
fe874d27 MC |
1731 | if (!tls_collect_extensions(s, &extensions, |
1732 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
1733 | &al, NULL) | |
1734 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, | |
5ee289ea MC |
1735 | rawexts, x, chainidx, &al)) { |
1736 | OPENSSL_free(rawexts); | |
e96e0f8e | 1737 | goto f_err; |
5ee289ea MC |
1738 | } |
1739 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1740 | } |
1741 | ||
0f113f3e | 1742 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1743 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1744 | goto err; |
0f113f3e MC |
1745 | } |
1746 | x = NULL; | |
0f113f3e MC |
1747 | } |
1748 | ||
1749 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1750 | /* |
1751 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1752 | * for client side verification of the server certificate to take place. | |
1753 | * However, historically the code has only checked that *any* flag is set | |
1754 | * to cause server verification to take place. Use of the other flags makes | |
1755 | * no sense in client mode. An attempt to clean up the semantics was | |
1756 | * reverted because at least one application *only* set | |
1757 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1758 | * server verification to take place, after the clean up it silently did | |
1759 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1760 | * sent to them because they are void functions. Therefore, we now use the | |
1761 | * (less clean) historic behaviour of performing validation if any flag is | |
1762 | * set. The *documented* interface remains the same. | |
1763 | */ | |
1764 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1765 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1766 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1767 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1768 | goto f_err; | |
1769 | } | |
1770 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1771 | if (i > 1) { | |
b9908bf9 | 1772 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1773 | al = SSL_AD_HANDSHAKE_FAILURE; |
1774 | goto f_err; | |
1775 | } | |
1776 | ||
c34b0f99 | 1777 | s->session->peer_chain = sk; |
0f113f3e MC |
1778 | /* |
1779 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1780 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1781 | */ |
1782 | x = sk_X509_value(sk, 0); | |
1783 | sk = NULL; | |
1784 | /* | |
1785 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1786 | */ | |
1787 | ||
8382fd3a | 1788 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1789 | |
55a9a16f | 1790 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1791 | x = NULL; |
1792 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1793 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1794 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1795 | goto f_err; | |
1796 | } | |
1797 | ||
1798 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1799 | if (i < 0) { |
0f113f3e MC |
1800 | x = NULL; |
1801 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1802 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1803 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1804 | goto f_err; | |
1805 | } | |
05b8486e DSH |
1806 | /* |
1807 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1808 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1809 | * type. | |
1810 | */ | |
1811 | if (!SSL_IS_TLS13(s)) { | |
1812 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1813 | if (exp_idx >= 0 && i != exp_idx | |
1814 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1815 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1816 | && i != SSL_PKEY_GOST01))) { | |
1817 | x = NULL; | |
1818 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1819 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1820 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1821 | goto f_err; | |
1822 | } | |
0f113f3e | 1823 | } |
a273c6ee | 1824 | s->session->peer_type = i; |
55a9a16f MC |
1825 | |
1826 | X509_free(s->session->peer); | |
05f0fb9f | 1827 | X509_up_ref(x); |
55a9a16f | 1828 | s->session->peer = x; |
0f113f3e | 1829 | s->session->verify_result = s->verify_result; |
0f113f3e | 1830 | x = NULL; |
2c5dfdc3 MC |
1831 | |
1832 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1833 | if (SSL_IS_TLS13(s) | |
1834 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1835 | sizeof(s->cert_verify_hash), | |
1836 | &s->cert_verify_hash_len)) { | |
1837 | al = SSL_AD_INTERNAL_ERROR; | |
1838 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1839 | goto f_err; | |
1840 | } | |
1841 | ||
b9908bf9 | 1842 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1843 | goto done; |
1844 | ||
0f113f3e | 1845 | f_err: |
66696478 | 1846 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1847 | err: |
fe3a3291 | 1848 | ossl_statem_set_error(s); |
66696478 | 1849 | done: |
0f113f3e MC |
1850 | X509_free(x); |
1851 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1852 | return ret; |
0f113f3e | 1853 | } |
d02b48c6 | 1854 | |
7dc1c647 | 1855 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1856 | { |
1857 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1858 | PACKET psk_identity_hint; |
02a74590 | 1859 | |
7dc1c647 MC |
1860 | /* PSK ciphersuites are preceded by an identity hint */ |
1861 | ||
1862 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1863 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1864 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1865 | return 0; |
1866 | } | |
1867 | ||
1868 | /* | |
1869 | * Store PSK identity hint for later use, hint is used in | |
1870 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1871 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1872 | * identity. | |
1873 | */ | |
1874 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1875 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1876 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1877 | return 0; |
1878 | } | |
02a74590 | 1879 | |
7dc1c647 MC |
1880 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1881 | OPENSSL_free(s->session->psk_identity_hint); | |
1882 | s->session->psk_identity_hint = NULL; | |
1883 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1884 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1885 | *al = SSL_AD_INTERNAL_ERROR; |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | return 1; | |
1890 | #else | |
4fa88861 | 1891 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1892 | *al = SSL_AD_INTERNAL_ERROR; |
1893 | return 0; | |
02a74590 MC |
1894 | #endif |
1895 | } | |
1896 | ||
25c6c10c MC |
1897 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1898 | { | |
1899 | #ifndef OPENSSL_NO_SRP | |
1900 | PACKET prime, generator, salt, server_pub; | |
1901 | ||
1902 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1903 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1904 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1905 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1906 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1907 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1908 | return 0; |
1909 | } | |
1910 | ||
348240c6 | 1911 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1912 | if ((s->srp_ctx.N = |
1913 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1914 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1915 | || (s->srp_ctx.g = |
1916 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1917 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1918 | || (s->srp_ctx.s = |
1919 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1920 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1921 | || (s->srp_ctx.B = |
1922 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1923 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1924 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1925 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1926 | return 0; |
1927 | } | |
1928 | ||
1929 | if (!srp_verify_server_param(s, al)) { | |
1930 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1931 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1932 | return 0; |
1933 | } | |
1934 | ||
1935 | /* We must check if there is a certificate */ | |
a230b26e | 1936 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1937 | *pkey = X509_get0_pubkey(s->session->peer); |
1938 | ||
1939 | return 1; | |
1940 | #else | |
4fa88861 | 1941 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1942 | *al = SSL_AD_INTERNAL_ERROR; |
1943 | return 0; | |
1944 | #endif | |
1945 | } | |
1946 | ||
e01a610d MC |
1947 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1948 | { | |
1949 | #ifndef OPENSSL_NO_DH | |
1950 | PACKET prime, generator, pub_key; | |
1951 | EVP_PKEY *peer_tmp = NULL; | |
1952 | ||
1953 | DH *dh = NULL; | |
1954 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1955 | ||
26505153 RL |
1956 | int check_bits = 0; |
1957 | ||
e01a610d MC |
1958 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1959 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1960 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1961 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1962 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1963 | return 0; |
1964 | } | |
1965 | ||
1966 | peer_tmp = EVP_PKEY_new(); | |
1967 | dh = DH_new(); | |
1968 | ||
1969 | if (peer_tmp == NULL || dh == NULL) { | |
1970 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1971 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1972 | goto err; |
1973 | } | |
1974 | ||
348240c6 MC |
1975 | /* TODO(size_t): Convert these calls */ |
1976 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1977 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1978 | NULL); | |
1979 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1980 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1981 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1982 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1983 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1984 | goto err; |
1985 | } | |
1986 | ||
69687aa8 | 1987 | /* test non-zero pubkey */ |
26505153 | 1988 | if (BN_is_zero(bnpub_key)) { |
e01a610d | 1989 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1990 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1991 | goto err; |
1992 | } | |
1993 | ||
1994 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1995 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1996 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1997 | goto err; |
1998 | } | |
1999 | p = g = NULL; | |
2000 | ||
26505153 RL |
2001 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
2002 | *al = SSL_AD_DECODE_ERROR; | |
2003 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
2004 | goto err; | |
2005 | } | |
2006 | ||
e01a610d MC |
2007 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
2008 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 2009 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
2010 | goto err; |
2011 | } | |
2012 | bnpub_key = NULL; | |
2013 | ||
2014 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
2015 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 2016 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
2017 | goto err; |
2018 | } | |
2019 | ||
2020 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
2021 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 2022 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
2023 | goto err; |
2024 | } | |
2025 | ||
2026 | s->s3->peer_tmp = peer_tmp; | |
2027 | ||
2028 | /* | |
2029 | * FIXME: This makes assumptions about which ciphersuites come with | |
2030 | * public keys. We should have a less ad-hoc way of doing this | |
2031 | */ | |
a230b26e | 2032 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2033 | *pkey = X509_get0_pubkey(s->session->peer); |
2034 | /* else anonymous DH, so no certificate or pkey. */ | |
2035 | ||
2036 | return 1; | |
2037 | ||
2038 | err: | |
2039 | BN_free(p); | |
2040 | BN_free(g); | |
2041 | BN_free(bnpub_key); | |
2042 | DH_free(dh); | |
2043 | EVP_PKEY_free(peer_tmp); | |
2044 | ||
2045 | return 0; | |
2046 | #else | |
4fa88861 | 2047 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
2048 | *al = SSL_AD_INTERNAL_ERROR; |
2049 | return 0; | |
2050 | #endif | |
2051 | } | |
2052 | ||
ff74aeb1 MC |
2053 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
2054 | { | |
2055 | #ifndef OPENSSL_NO_EC | |
2056 | PACKET encoded_pt; | |
2057 | const unsigned char *ecparams; | |
2058 | int curve_nid; | |
ec24630a | 2059 | unsigned int curve_flags; |
ff74aeb1 MC |
2060 | EVP_PKEY_CTX *pctx = NULL; |
2061 | ||
2062 | /* | |
2063 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
2064 | * public key. For now we only support named (not generic) curves and | |
2065 | * ECParameters in this case is just three bytes. | |
2066 | */ | |
2067 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
2068 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2069 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2070 | return 0; |
2071 | } | |
2072 | /* | |
2073 | * Check curve is one of our preferences, if not server has sent an | |
2074 | * invalid curve. ECParameters is 3 bytes. | |
2075 | */ | |
2076 | if (!tls1_check_curve(s, ecparams, 3)) { | |
2077 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2078 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2079 | return 0; |
2080 | } | |
2081 | ||
ec24630a DSH |
2082 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
2083 | ||
a230b26e | 2084 | if (curve_nid == 0) { |
ff74aeb1 | 2085 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 2086 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
2087 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
2088 | return 0; | |
2089 | } | |
2090 | ||
ec24630a DSH |
2091 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
2092 | EVP_PKEY *key = EVP_PKEY_new(); | |
2093 | ||
2094 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
2095 | *al = SSL_AD_INTERNAL_ERROR; | |
2096 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2097 | EVP_PKEY_free(key); | |
2098 | return 0; | |
2099 | } | |
2100 | s->s3->peer_tmp = key; | |
2101 | } else { | |
2102 | /* Set up EVP_PKEY with named curve as parameters */ | |
2103 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
2104 | if (pctx == NULL | |
2105 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2106 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2107 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2108 | *al = SSL_AD_INTERNAL_ERROR; | |
2109 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2110 | EVP_PKEY_CTX_free(pctx); | |
2111 | return 0; | |
2112 | } | |
ff74aeb1 | 2113 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2114 | pctx = NULL; |
ff74aeb1 | 2115 | } |
ff74aeb1 MC |
2116 | |
2117 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2118 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2119 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2120 | return 0; |
2121 | } | |
2122 | ||
ec24630a DSH |
2123 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2124 | PACKET_data(&encoded_pt), | |
2125 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 2126 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 2127 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2128 | return 0; |
2129 | } | |
2130 | ||
2131 | /* | |
2132 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2133 | * ECParameters in the server key exchange message. We do support RSA | |
2134 | * and ECDSA. | |
2135 | */ | |
2136 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2137 | *pkey = X509_get0_pubkey(s->session->peer); | |
2138 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2139 | *pkey = X509_get0_pubkey(s->session->peer); | |
2140 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2141 | ||
2142 | return 1; | |
2143 | #else | |
4fa88861 | 2144 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2145 | *al = SSL_AD_INTERNAL_ERROR; |
2146 | return 0; | |
2147 | #endif | |
2148 | } | |
2149 | ||
be3583fa | 2150 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2151 | { |
5554facb | 2152 | int al = -1; |
e1e588ac | 2153 | long alg_k; |
b9908bf9 | 2154 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2155 | EVP_MD_CTX *md_ctx = NULL; |
2156 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2157 | PACKET save_param_start, signature; |
b9908bf9 | 2158 | |
b9908bf9 MC |
2159 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2160 | ||
73999b62 | 2161 | save_param_start = *pkt; |
8d92c1f8 | 2162 | |
3260adf1 | 2163 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2164 | EVP_PKEY_free(s->s3->peer_tmp); |
2165 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2166 | #endif |
d02b48c6 | 2167 | |
7689082b | 2168 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2169 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2170 | goto err; | |
7689082b DSH |
2171 | } |
2172 | ||
2173 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2174 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2175 | } else if (alg_k & SSL_kSRP) { |
2176 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2177 | goto err; |
e01a610d MC |
2178 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2179 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2180 | goto err; | |
ff74aeb1 MC |
2181 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2182 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2183 | goto err; | |
0f113f3e MC |
2184 | } else if (alg_k) { |
2185 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2186 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2187 | goto err; |
0f113f3e | 2188 | } |
0f113f3e | 2189 | |
0f113f3e MC |
2190 | /* if it was signed, check the signature */ |
2191 | if (pkey != NULL) { | |
32942870 | 2192 | PACKET params; |
be8dba2c MC |
2193 | int maxsig; |
2194 | const EVP_MD *md = NULL; | |
e1e588ac | 2195 | |
32942870 EK |
2196 | /* |
2197 | * |pkt| now points to the beginning of the signature, so the difference | |
2198 | * equals the length of the parameters. | |
2199 | */ | |
2200 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2201 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2202 | PACKET_remaining(pkt))) { |
32942870 | 2203 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2204 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2205 | goto err; |
32942870 EK |
2206 | } |
2207 | ||
0f113f3e | 2208 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2209 | unsigned int sigalg; |
0f113f3e | 2210 | int rv; |
703bcee0 MC |
2211 | |
2212 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2213 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2214 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2215 | goto err; |
0f113f3e | 2216 | } |
5554facb | 2217 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2218 | if (rv == -1) { |
2219 | al = SSL_AD_INTERNAL_ERROR; | |
2220 | goto err; | |
2221 | } else if (rv == 0) { | |
2222 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2223 | goto err; |
0f113f3e | 2224 | } |
a2f9200f | 2225 | #ifdef SSL_DEBUG |
0f113f3e MC |
2226 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2227 | #endif | |
f365a3e2 DSH |
2228 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2229 | al = SSL_AD_INTERNAL_ERROR; | |
2230 | goto err; | |
32942870 | 2231 | } |
0f113f3e | 2232 | |
f365a3e2 DSH |
2233 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2234 | ||
73999b62 MC |
2235 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2236 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2237 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2238 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2239 | goto err; |
0f113f3e | 2240 | } |
be8dba2c MC |
2241 | maxsig = EVP_PKEY_size(pkey); |
2242 | if (maxsig < 0) { | |
e1e588ac | 2243 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2244 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2245 | goto err; |
8098fc56 | 2246 | } |
0f113f3e MC |
2247 | |
2248 | /* | |
8098fc56 | 2249 | * Check signature length |
0f113f3e | 2250 | */ |
be8dba2c | 2251 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2252 | /* wrong packet length */ |
e1e588ac | 2253 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2254 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2255 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2256 | goto err; |
2257 | } | |
2258 | ||
2259 | md_ctx = EVP_MD_CTX_new(); | |
2260 | if (md_ctx == NULL) { | |
2261 | al = SSL_AD_INTERNAL_ERROR; | |
2262 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2263 | goto err; | |
0f113f3e | 2264 | } |
e1e588ac | 2265 | |
fe3066ee MC |
2266 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2267 | al = SSL_AD_INTERNAL_ERROR; | |
2268 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2269 | goto err; | |
2270 | } | |
5554facb | 2271 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2272 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2273 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2274 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2275 | al = SSL_AD_INTERNAL_ERROR; |
2276 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2277 | goto err; | |
2278 | } | |
2279 | } | |
2280 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2281 | SSL3_RANDOM_SIZE) <= 0 | |
2282 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2283 | SSL3_RANDOM_SIZE) <= 0 | |
2284 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2285 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2286 | al = SSL_AD_INTERNAL_ERROR; |
2287 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2288 | goto err; |
192e4bbb | 2289 | } |
fe3066ee MC |
2290 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2291 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2292 | /* bad signature */ |
2293 | al = SSL_AD_DECRYPT_ERROR; | |
2294 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2295 | goto err; |
0f113f3e | 2296 | } |
e1e588ac | 2297 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2298 | md_ctx = NULL; |
0f113f3e | 2299 | } else { |
7689082b | 2300 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2301 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2302 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2303 | /* Might be wrong key type, check it */ |
e1e588ac | 2304 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2305 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2306 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2307 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2308 | } else { |
2309 | al = SSL_AD_DECODE_ERROR; | |
2310 | } | |
0f113f3e MC |
2311 | goto err; |
2312 | } | |
2313 | /* still data left over */ | |
73999b62 | 2314 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2315 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2316 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2317 | goto err; |
0f113f3e MC |
2318 | } |
2319 | } | |
e1e588ac | 2320 | |
b9908bf9 | 2321 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2322 | err: |
7dc1c647 MC |
2323 | if (al != -1) |
2324 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2325 | ossl_statem_set_error(s); |
fe3066ee | 2326 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2327 | return MSG_PROCESS_ERROR; |
0f113f3e | 2328 | } |
d02b48c6 | 2329 | |
be3583fa | 2330 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2331 | { |
2332 | int ret = MSG_PROCESS_ERROR; | |
32f66107 DSH |
2333 | int al = SSL_AD_DECODE_ERROR; |
2334 | size_t i; | |
2335 | ||
2336 | /* Clear certificate validity flags */ | |
2337 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2338 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2339 | |
03f44b97 | 2340 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2341 | PACKET reqctx, extensions; |
2342 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2343 | |
2344 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2345 | OPENSSL_free(s->s3->tmp.ctype); | |
2346 | s->s3->tmp.ctype = NULL; | |
2347 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2348 | |
03f44b97 DSH |
2349 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2350 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2351 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2352 | SSL_R_LENGTH_MISMATCH); | |
2353 | goto err; | |
2354 | } | |
32f66107 DSH |
2355 | |
2356 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
45615c5f | 2357 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_BAD_LENGTH); |
32f66107 DSH |
2358 | goto err; |
2359 | } | |
2360 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2361 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
32f66107 | 2362 | &rawexts, &al, NULL) |
fe874d27 | 2363 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
32f66107 DSH |
2364 | rawexts, NULL, 0, &al)) { |
2365 | OPENSSL_free(rawexts); | |
2366 | goto err; | |
2367 | } | |
2368 | OPENSSL_free(rawexts); | |
2369 | if (!tls1_process_sigalgs(s)) { | |
2370 | al = SSL_AD_INTERNAL_ERROR; | |
2371 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2372 | goto err; | |
2373 | } | |
03f44b97 DSH |
2374 | } else { |
2375 | PACKET ctypes; | |
75c13e78 | 2376 | |
03f44b97 DSH |
2377 | /* get the certificate types */ |
2378 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
03f44b97 DSH |
2379 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2380 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2381 | goto err; |
03f44b97 DSH |
2382 | } |
2383 | ||
2384 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
32f66107 | 2385 | al = SSL_AD_INTERNAL_ERROR; |
03f44b97 DSH |
2386 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); |
2387 | goto err; | |
2388 | } | |
ac112332 | 2389 | |
32f66107 DSH |
2390 | if (SSL_USE_SIGALGS(s)) { |
2391 | PACKET sigalgs; | |
703bcee0 | 2392 | |
32f66107 DSH |
2393 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
2394 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2395 | SSL_R_LENGTH_MISMATCH); | |
2396 | goto err; | |
2397 | } | |
ac112332 | 2398 | |
32f66107 DSH |
2399 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
2400 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2401 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2402 | goto err; | |
2403 | } | |
2404 | if (!tls1_process_sigalgs(s)) { | |
2405 | al = SSL_AD_INTERNAL_ERROR; | |
2406 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2407 | ERR_R_MALLOC_FAILURE); | |
2408 | goto err; | |
2409 | } | |
0f113f3e | 2410 | } |
0f113f3e | 2411 | |
32f66107 DSH |
2412 | /* get the CA RDNs */ |
2413 | if (!parse_ca_names(s, pkt, &al)) | |
03f44b97 | 2414 | goto err; |
03f44b97 DSH |
2415 | } |
2416 | ||
2417 | if (PACKET_remaining(pkt) != 0) { | |
03f44b97 DSH |
2418 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
2419 | goto err; | |
2420 | } | |
0f113f3e | 2421 | |
0f113f3e MC |
2422 | /* we should setup a certificate to return.... */ |
2423 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2424 | |
05c4f1d5 | 2425 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2426 | goto done; |
0f113f3e | 2427 | err: |
32f66107 | 2428 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
fe3a3291 | 2429 | ossl_statem_set_error(s); |
cc273a93 | 2430 | done: |
b9908bf9 | 2431 | return ret; |
0f113f3e MC |
2432 | } |
2433 | ||
be3583fa | 2434 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2435 | { |
6df55cac | 2436 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2437 | unsigned int ticklen; |
9ac6244b | 2438 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2439 | unsigned int sess_len; |
de1df7e9 | 2440 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2441 | |
73999b62 | 2442 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2443 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2444 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2445 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2446 | || (SSL_IS_TLS13(s) |
2447 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2448 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2449 | goto f_err; |
2450 | } | |
2451 | ||
de1df7e9 MC |
2452 | /* |
2453 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2454 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2455 | * be 0 here in that instance | |
2456 | */ | |
e711da71 | 2457 | if (ticklen == 0) |
c9de4a20 | 2458 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2459 | |
de1df7e9 | 2460 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2461 | if (s->session->session_id_length > 0) { |
2462 | int i = s->session_ctx->session_cache_mode; | |
2463 | SSL_SESSION *new_sess; | |
2464 | /* | |
2465 | * We reused an existing session, so we need to replace it with a new | |
2466 | * one | |
2467 | */ | |
2468 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2469 | /* | |
e4612d02 | 2470 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2471 | */ |
e4612d02 | 2472 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2473 | } |
2474 | ||
2475 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2476 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2477 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2478 | goto f_err; |
2479 | } | |
2480 | ||
2481 | SSL_SESSION_free(s->session); | |
2482 | s->session = new_sess; | |
2483 | } | |
2484 | ||
fc24f0bf MC |
2485 | /* |
2486 | * Technically the cast to long here is not guaranteed by the C standard - | |
2487 | * but we use it elsewhere, so this should be ok. | |
2488 | */ | |
2489 | s->session->time = (long)time(NULL); | |
2490 | ||
aff8c126 RS |
2491 | OPENSSL_free(s->session->ext.tick); |
2492 | s->session->ext.tick = NULL; | |
2493 | s->session->ext.ticklen = 0; | |
e711da71 | 2494 | |
aff8c126 RS |
2495 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2496 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2497 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2498 | goto err; |
2499 | } | |
aff8c126 | 2500 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2501 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2502 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2503 | goto f_err; |
2504 | } | |
e711da71 | 2505 | |
aff8c126 | 2506 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2507 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2508 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2509 | |
2510 | if (SSL_IS_TLS13(s)) { | |
2511 | PACKET extpkt; | |
2512 | ||
2513 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2514 | || !tls_collect_extensions(s, &extpkt, | |
fe874d27 | 2515 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
fc5ece2e | 2516 | &exts, &al, NULL) |
fe874d27 MC |
2517 | || !tls_parse_all_extensions(s, |
2518 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
de1df7e9 MC |
2519 | exts, NULL, 0, &al)) { |
2520 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2521 | goto f_err; | |
2522 | } | |
2523 | } | |
2524 | ||
0f113f3e MC |
2525 | /* |
2526 | * There are two ways to detect a resumed ticket session. One is to set | |
2527 | * an appropriate session ID and then the server must return a match in | |
2528 | * ServerHello. This allows the normal client session ID matching to work | |
2529 | * and we know much earlier that the ticket has been accepted. The | |
2530 | * other way is to set zero length session ID when the ticket is | |
2531 | * presented and rely on the handshake to determine session resumption. | |
2532 | * We choose the former approach because this fits in with assumptions | |
2533 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2534 | * SHA256 is disabled) hash of the ticket. | |
2535 | */ | |
ec60ccc1 MC |
2536 | /* |
2537 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2538 | * but s->session->session_id_length is a size_t | |
2539 | */ | |
aff8c126 | 2540 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2541 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2542 | EVP_sha256(), NULL)) { |
2543 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2544 | goto err; | |
2545 | } | |
ec60ccc1 | 2546 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2547 | |
2548 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2549 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2550 | OPENSSL_free(exts); |
de1df7e9 MC |
2551 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2552 | return MSG_PROCESS_FINISHED_READING; | |
2553 | } | |
2554 | ||
b9908bf9 | 2555 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2556 | f_err: |
2557 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2558 | err: | |
fe3a3291 | 2559 | ossl_statem_set_error(s); |
33d93417 | 2560 | OPENSSL_free(exts); |
b9908bf9 | 2561 | return MSG_PROCESS_ERROR; |
0f113f3e | 2562 | } |
67c8e7f4 | 2563 | |
f63e4288 MC |
2564 | /* |
2565 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2566 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2567 | * |*al| is populated with a suitable alert code. | |
2568 | */ | |
2569 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2570 | { |
8b0e934a | 2571 | size_t resplen; |
b9908bf9 | 2572 | unsigned int type; |
b9908bf9 | 2573 | |
73999b62 | 2574 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2575 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2576 | *al = SSL_AD_DECODE_ERROR; |
2577 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2578 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2579 | return 0; | |
0f113f3e | 2580 | } |
56a26ce3 MC |
2581 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2582 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2583 | *al = SSL_AD_DECODE_ERROR; |
2584 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2585 | return 0; | |
0f113f3e | 2586 | } |
8cbfcc70 RS |
2587 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2588 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2589 | *al = SSL_AD_INTERNAL_ERROR; |
2590 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2591 | return 0; | |
0f113f3e | 2592 | } |
8cbfcc70 | 2593 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2594 | *al = SSL_AD_DECODE_ERROR; |
2595 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2596 | return 0; | |
ac63710a | 2597 | } |
8cbfcc70 | 2598 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2599 | |
2600 | return 1; | |
2601 | } | |
2faa1b48 | 2602 | |
f63e4288 MC |
2603 | |
2604 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2605 | { | |
2606 | int al; | |
2607 | ||
2608 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2609 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2610 | ossl_statem_set_error(s); | |
2611 | return MSG_PROCESS_ERROR; | |
2612 | } | |
2613 | ||
b9908bf9 | 2614 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2615 | } |
d02b48c6 | 2616 | |
7776a36c MC |
2617 | /* |
2618 | * Perform miscellaneous checks and processing after we have received the | |
2619 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2620 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2621 | * on failure. | |
7776a36c MC |
2622 | */ |
2623 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2624 | { |
a455d0f6 MC |
2625 | /* |
2626 | * at this point we check that we have the required stuff from | |
2627 | * the server | |
2628 | */ | |
2629 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2630 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2631 | return 0; | |
a455d0f6 MC |
2632 | } |
2633 | ||
bb1aaab4 | 2634 | /* |
aff8c126 RS |
2635 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2636 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2637 | * message, or NULL and -1 otherwise |
2638 | */ | |
aff8c126 RS |
2639 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2640 | && s->ctx->ext.status_cb != NULL) { | |
2641 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2642 | ||
bb1aaab4 | 2643 | if (ret == 0) { |
7776a36c MC |
2644 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2645 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2646 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2647 | return 0; |
bb1aaab4 MC |
2648 | } |
2649 | if (ret < 0) { | |
7776a36c MC |
2650 | *al = SSL_AD_INTERNAL_ERROR; |
2651 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2652 | ERR_R_MALLOC_FAILURE); | |
2653 | return 0; | |
bb1aaab4 MC |
2654 | } |
2655 | } | |
ed29e82a RP |
2656 | #ifndef OPENSSL_NO_CT |
2657 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2658 | /* Note we validate the SCTs whether or not we abort on error */ |
2659 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2660 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2661 | return 0; | |
ed29e82a RP |
2662 | } |
2663 | } | |
2664 | #endif | |
2665 | ||
7776a36c MC |
2666 | return 1; |
2667 | } | |
2668 | ||
2669 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2670 | { | |
2671 | int al = SSL_AD_INTERNAL_ERROR; | |
2672 | ||
2673 | if (PACKET_remaining(pkt) > 0) { | |
2674 | /* should contain no data */ | |
2675 | al = SSL_AD_DECODE_ERROR; | |
2676 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2677 | goto err; | |
2678 | } | |
2679 | #ifndef OPENSSL_NO_SRP | |
2680 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2681 | if (SRP_Calc_A_param(s) <= 0) { | |
2682 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2683 | goto err; | |
2684 | } | |
2685 | } | |
2686 | #endif | |
2687 | ||
2688 | /* | |
2689 | * Error queue messages are generated directly by this function | |
2690 | */ | |
2691 | if (!tls_process_initial_server_flight(s, &al)) | |
2692 | goto err; | |
2693 | ||
473483d4 MC |
2694 | #ifndef OPENSSL_NO_SCTP |
2695 | /* Only applies to renegotiation */ | |
2696 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2697 | && s->renegotiate != 0) |
473483d4 MC |
2698 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2699 | else | |
2700 | #endif | |
2701 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2702 | |
2703 | err: | |
2704 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2705 | ossl_statem_set_error(s); | |
2706 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2707 | } |
176f31dd | 2708 | |
f1ec23c0 | 2709 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2710 | { |
7689082b | 2711 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2712 | int ret = 0; |
2713 | /* | |
2714 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2715 | * \0-terminated identity. The last byte is for us for simulating | |
2716 | * strnlen. | |
2717 | */ | |
2718 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2719 | size_t identitylen = 0; | |
2720 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2721 | unsigned char *tmppsk = NULL; | |
2722 | char *tmpidentity = NULL; | |
2723 | size_t psklen = 0; | |
2724 | ||
2725 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2726 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2727 | *al = SSL_AD_INTERNAL_ERROR; |
2728 | goto err; | |
2729 | } | |
d02b48c6 | 2730 | |
13c0ec4a | 2731 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2732 | |
13c0ec4a MC |
2733 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2734 | identity, sizeof(identity) - 1, | |
2735 | psk, sizeof(psk)); | |
7689082b | 2736 | |
13c0ec4a | 2737 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2738 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2739 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2740 | goto err; | |
2741 | } else if (psklen == 0) { | |
05ec6a25 | 2742 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2743 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2744 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2745 | goto err; | |
2746 | } | |
7689082b | 2747 | |
13c0ec4a MC |
2748 | identitylen = strlen(identity); |
2749 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2750 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2751 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2752 | goto err; | |
2753 | } | |
7689082b | 2754 | |
13c0ec4a MC |
2755 | tmppsk = OPENSSL_memdup(psk, psklen); |
2756 | tmpidentity = OPENSSL_strdup(identity); | |
2757 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2758 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2759 | *al = SSL_AD_INTERNAL_ERROR; |
2760 | goto err; | |
2761 | } | |
7689082b | 2762 | |
13c0ec4a MC |
2763 | OPENSSL_free(s->s3->tmp.psk); |
2764 | s->s3->tmp.psk = tmppsk; | |
2765 | s->s3->tmp.psklen = psklen; | |
2766 | tmppsk = NULL; | |
2767 | OPENSSL_free(s->session->psk_identity); | |
2768 | s->session->psk_identity = tmpidentity; | |
2769 | tmpidentity = NULL; | |
f1ec23c0 | 2770 | |
b2b3024e | 2771 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2772 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2773 | *al = SSL_AD_INTERNAL_ERROR; | |
2774 | goto err; | |
2775 | } | |
7689082b | 2776 | |
13c0ec4a | 2777 | ret = 1; |
0bce0b02 | 2778 | |
13c0ec4a MC |
2779 | err: |
2780 | OPENSSL_cleanse(psk, psklen); | |
2781 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2782 | OPENSSL_clear_free(tmppsk, psklen); | |
2783 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2784 | |
13c0ec4a MC |
2785 | return ret; |
2786 | #else | |
05ec6a25 | 2787 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2788 | *al = SSL_AD_INTERNAL_ERROR; |
2789 | return 0; | |
b9908bf9 | 2790 | #endif |
13c0ec4a | 2791 | } |
b9908bf9 | 2792 | |
f1ec23c0 | 2793 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2794 | { |
bc36ee62 | 2795 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2796 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2797 | EVP_PKEY *pkey = NULL; |
2798 | EVP_PKEY_CTX *pctx = NULL; | |
2799 | size_t enclen; | |
2800 | unsigned char *pms = NULL; | |
2801 | size_t pmslen = 0; | |
b9908bf9 | 2802 | |
13c0ec4a MC |
2803 | if (s->session->peer == NULL) { |
2804 | /* | |
2805 | * We should always have a server certificate with SSL_kRSA. | |
2806 | */ | |
05ec6a25 | 2807 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2808 | return 0; |
2809 | } | |
0f113f3e | 2810 | |
13c0ec4a MC |
2811 | pkey = X509_get0_pubkey(s->session->peer); |
2812 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2813 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2814 | return 0; |
2815 | } | |
0f113f3e | 2816 | |
13c0ec4a MC |
2817 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2818 | pms = OPENSSL_malloc(pmslen); | |
2819 | if (pms == NULL) { | |
05ec6a25 | 2820 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2821 | *al = SSL_AD_INTERNAL_ERROR; |
2822 | return 0; | |
2823 | } | |
0bce0b02 | 2824 | |
13c0ec4a MC |
2825 | pms[0] = s->client_version >> 8; |
2826 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2827 | /* TODO(size_t): Convert this function */ |
2828 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2829 | goto err; |
2830 | } | |
0f113f3e | 2831 | |
13c0ec4a | 2832 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2833 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2834 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2835 | goto err; | |
2836 | } | |
13c0ec4a MC |
2837 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2838 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2839 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2840 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2841 | goto err; |
2842 | } | |
f1ec23c0 MC |
2843 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2844 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2845 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2846 | goto err; |
2847 | } | |
13c0ec4a MC |
2848 | EVP_PKEY_CTX_free(pctx); |
2849 | pctx = NULL; | |
0f113f3e | 2850 | |
13c0ec4a | 2851 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2852 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2853 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2854 | goto err; | |
b9908bf9 | 2855 | } |
13c0ec4a MC |
2856 | |
2857 | s->s3->tmp.pms = pms; | |
2858 | s->s3->tmp.pmslen = pmslen; | |
2859 | ||
2faa1b48 CB |
2860 | /* Log the premaster secret, if logging is enabled. */ |
2861 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2862 | goto err; | |
2863 | ||
13c0ec4a MC |
2864 | return 1; |
2865 | err: | |
2866 | OPENSSL_clear_free(pms, pmslen); | |
2867 | EVP_PKEY_CTX_free(pctx); | |
2868 | ||
2869 | return 0; | |
2870 | #else | |
05ec6a25 | 2871 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2872 | *al = SSL_AD_INTERNAL_ERROR; |
2873 | return 0; | |
f9b3bff6 | 2874 | #endif |
13c0ec4a MC |
2875 | } |
2876 | ||
f1ec23c0 | 2877 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2878 | { |
2879 | #ifndef OPENSSL_NO_DH | |
2880 | DH *dh_clnt = NULL; | |
2881 | const BIGNUM *pub_key; | |
2882 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2883 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2884 | |
2885 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2886 | if (skey == NULL) |
2887 | goto err; | |
2888 | ||
0a699a07 | 2889 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2890 | if (ckey == NULL) |
2891 | goto err; | |
2892 | ||
a8c1c704 MC |
2893 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2894 | ||
0f1e51ea | 2895 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2896 | goto err; |
a8c1c704 MC |
2897 | |
2898 | /* send off the data */ | |
2899 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2900 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2901 | goto err; |
2902 | ||
2903 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2904 | EVP_PKEY_free(ckey); |
2905 | ||
2906 | return 1; | |
f1ec23c0 MC |
2907 | err: |
2908 | EVP_PKEY_free(ckey); | |
2909 | #endif | |
05ec6a25 | 2910 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2911 | *al = SSL_AD_INTERNAL_ERROR; |
2912 | return 0; | |
a8c1c704 MC |
2913 | } |
2914 | ||
f1ec23c0 | 2915 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2916 | { |
2917 | #ifndef OPENSSL_NO_EC | |
2918 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2919 | size_t encoded_pt_len = 0; |
67ad5aab | 2920 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2921 | int ret = 0; |
67ad5aab MC |
2922 | |
2923 | skey = s->s3->peer_tmp; | |
ec24630a | 2924 | if (skey == NULL) { |
05ec6a25 | 2925 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2926 | return 0; |
2927 | } | |
2928 | ||
0a699a07 | 2929 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2930 | if (ckey == NULL) { |
2931 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2932 | goto err; | |
2933 | } | |
67ad5aab | 2934 | |
0f1e51ea | 2935 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2936 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2937 | goto err; |
2938 | } | |
2939 | ||
2940 | /* Generate encoding of client key */ | |
ec24630a | 2941 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2942 | |
2943 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2944 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2945 | goto err; |
2946 | } | |
2947 | ||
b2b3024e | 2948 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2949 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2950 | goto err; | |
2951 | } | |
67ad5aab | 2952 | |
f1ec23c0 | 2953 | ret = 1; |
67ad5aab | 2954 | err: |
f1ec23c0 | 2955 | OPENSSL_free(encodedPoint); |
67ad5aab | 2956 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2957 | return ret; |
67ad5aab | 2958 | #else |
05ec6a25 | 2959 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2960 | *al = SSL_AD_INTERNAL_ERROR; |
2961 | return 0; | |
2962 | #endif | |
2963 | } | |
2964 | ||
f1ec23c0 | 2965 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2966 | { |
2967 | #ifndef OPENSSL_NO_GOST | |
2968 | /* GOST key exchange message creation */ | |
2969 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2970 | X509 *peer_cert; | |
2971 | size_t msglen; | |
2972 | unsigned int md_len; | |
2973 | unsigned char shared_ukm[32], tmp[256]; | |
2974 | EVP_MD_CTX *ukm_hash = NULL; | |
2975 | int dgst_nid = NID_id_GostR3411_94; | |
2976 | unsigned char *pms = NULL; | |
2977 | size_t pmslen = 0; | |
2978 | ||
2979 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2980 | dgst_nid = NID_id_GostR3411_2012_256; | |
2981 | ||
2982 | /* | |
1ee4b98e | 2983 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
2984 | */ |
2985 | peer_cert = s->session->peer; | |
2986 | if (!peer_cert) { | |
2987 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2988 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2989 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2990 | return 0; | |
2991 | } | |
2992 | ||
2993 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2994 | if (pkey_ctx == NULL) { | |
2995 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2996 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2997 | return 0; |
2998 | } | |
2999 | /* | |
3000 | * If we have send a certificate, and certificate key | |
3001 | * parameters match those of server certificate, use | |
3002 | * certificate key for key exchange | |
3003 | */ | |
3004 | ||
3005 | /* Otherwise, generate ephemeral key pair */ | |
3006 | pmslen = 32; | |
3007 | pms = OPENSSL_malloc(pmslen); | |
3008 | if (pms == NULL) { | |
3009 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3010 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 3011 | goto err; |
e00e0b3d MC |
3012 | } |
3013 | ||
3014 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3015 | /* Generate session key |
3016 | * TODO(size_t): Convert this function | |
3017 | */ | |
3018 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 3019 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 3020 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3021 | goto err; |
3022 | }; | |
e00e0b3d MC |
3023 | /* |
3024 | * Compute shared IV and store it in algorithm-specific context | |
3025 | * data | |
3026 | */ | |
3027 | ukm_hash = EVP_MD_CTX_new(); | |
3028 | if (ukm_hash == NULL | |
a230b26e EK |
3029 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3030 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3031 | SSL3_RANDOM_SIZE) <= 0 | |
3032 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3033 | SSL3_RANDOM_SIZE) <= 0 | |
3034 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 3035 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 3036 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3037 | goto err; |
3038 | } | |
3039 | EVP_MD_CTX_free(ukm_hash); | |
3040 | ukm_hash = NULL; | |
3041 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3042 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
3043 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3044 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3045 | goto err; |
3046 | } | |
3047 | /* Make GOST keytransport blob message */ | |
3048 | /* | |
3049 | * Encapsulate it into sequence | |
3050 | */ | |
e00e0b3d MC |
3051 | msglen = 255; |
3052 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
3053 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3054 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3055 | goto err; |
3056 | } | |
f1ec23c0 | 3057 | |
08029dfa MC |
3058 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3059 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3060 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3061 | *al = SSL_AD_INTERNAL_ERROR; |
3062 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3063 | goto err; | |
e00e0b3d | 3064 | } |
f1ec23c0 | 3065 | |
e00e0b3d MC |
3066 | EVP_PKEY_CTX_free(pkey_ctx); |
3067 | s->s3->tmp.pms = pms; | |
3068 | s->s3->tmp.pmslen = pmslen; | |
3069 | ||
3070 | return 1; | |
3071 | err: | |
3072 | EVP_PKEY_CTX_free(pkey_ctx); | |
3073 | OPENSSL_clear_free(pms, pmslen); | |
3074 | EVP_MD_CTX_free(ukm_hash); | |
3075 | return 0; | |
3076 | #else | |
05ec6a25 | 3077 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3078 | *al = SSL_AD_INTERNAL_ERROR; |
3079 | return 0; | |
3080 | #endif | |
3081 | } | |
3082 | ||
f1ec23c0 | 3083 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3084 | { |
8b9546c7 | 3085 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3086 | unsigned char *abytes = NULL; |
3087 | ||
3088 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3089 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3090 | &abytes)) { | |
05ec6a25 | 3091 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3092 | return 0; |
3093 | } | |
f1ec23c0 MC |
3094 | BN_bn2bin(s->srp_ctx.A, abytes); |
3095 | ||
840a2bf8 MC |
3096 | OPENSSL_free(s->session->srp_username); |
3097 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3098 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3099 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3100 | return 0; |
3101 | } | |
3102 | ||
3103 | return 1; | |
3104 | #else | |
05ec6a25 | 3105 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3106 | *al = SSL_AD_INTERNAL_ERROR; |
3107 | return 0; | |
3108 | #endif | |
3109 | } | |
3110 | ||
7cea05dc | 3111 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3112 | { |
13c0ec4a MC |
3113 | unsigned long alg_k; |
3114 | int al = -1; | |
3115 | ||
f1ec23c0 | 3116 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3117 | |
13c0ec4a | 3118 | if ((alg_k & SSL_PSK) |
7cea05dc | 3119 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3120 | goto err; |
3121 | ||
f1ec23c0 | 3122 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3123 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3124 | goto err; |
a8c1c704 | 3125 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3126 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3127 | goto err; |
67ad5aab | 3128 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3129 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3130 | goto err; |
e00e0b3d | 3131 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3132 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3133 | goto err; |
840a2bf8 | 3134 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3135 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3136 | goto err; |
4a424545 | 3137 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3138 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3139 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3140 | goto err; | |
3141 | } | |
3142 | ||
b9908bf9 | 3143 | return 1; |
0f113f3e | 3144 | err: |
13c0ec4a MC |
3145 | if (al != -1) |
3146 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3147 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3148 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3149 | #ifndef OPENSSL_NO_PSK |
3150 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3151 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3152 | #endif |
b9908bf9 MC |
3153 | return 0; |
3154 | } | |
3155 | ||
3156 | int tls_client_key_exchange_post_work(SSL *s) | |
3157 | { | |
3158 | unsigned char *pms = NULL; | |
3159 | size_t pmslen = 0; | |
3160 | ||
6f137370 MC |
3161 | pms = s->s3->tmp.pms; |
3162 | pmslen = s->s3->tmp.pmslen; | |
3163 | ||
b9908bf9 MC |
3164 | #ifndef OPENSSL_NO_SRP |
3165 | /* Check for SRP */ | |
3166 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3167 | if (!srp_generate_client_master_secret(s)) { | |
3168 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3169 | ERR_R_INTERNAL_ERROR); | |
3170 | goto err; | |
3171 | } | |
3172 | return 1; | |
3173 | } | |
3174 | #endif | |
b9908bf9 MC |
3175 | |
3176 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3177 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3178 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3179 | goto err; | |
3180 | } | |
3181 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3182 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3183 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3184 | /* ssl_generate_master_secret frees the pms even on error */ |
3185 | pms = NULL; | |
3186 | pmslen = 0; | |
b9908bf9 MC |
3187 | goto err; |
3188 | } | |
6f137370 MC |
3189 | pms = NULL; |
3190 | pmslen = 0; | |
473483d4 MC |
3191 | |
3192 | #ifndef OPENSSL_NO_SCTP | |
3193 | if (SSL_IS_DTLS(s)) { | |
3194 | unsigned char sctpauthkey[64]; | |
3195 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3196 | ||
3197 | /* | |
3198 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3199 | * used. | |
3200 | */ | |
141eb8c6 MC |
3201 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3202 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3203 | |
3204 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3205 | sizeof(sctpauthkey), labelbuffer, |
3206 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3207 | goto err; |
3208 | ||
3209 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3210 | sizeof(sctpauthkey), sctpauthkey); | |
3211 | } | |
3212 | #endif | |
3213 | ||
b9908bf9 MC |
3214 | return 1; |
3215 | err: | |
3216 | OPENSSL_clear_free(pms, pmslen); | |
3217 | s->s3->tmp.pms = NULL; | |
3218 | return 0; | |
0f113f3e | 3219 | } |
d02b48c6 | 3220 | |
0f113f3e MC |
3221 | /* |
3222 | * Check a certificate can be used for client authentication. Currently check | |
3223 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3224 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3225 | */ |
3226 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3227 | { |
0f113f3e | 3228 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3229 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3230 | return 0; |
3231 | /* | |
3232 | * If strict mode check suitability of chain before using it. This also | |
3233 | * adjusts suite B digest if necessary. | |
3234 | */ | |
3235 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3236 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3237 | return 0; | |
0f113f3e MC |
3238 | return 1; |
3239 | } | |
0d609395 | 3240 | |
be3583fa | 3241 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3242 | { |
3243 | X509 *x509 = NULL; | |
3244 | EVP_PKEY *pkey = NULL; | |
3245 | int i; | |
3246 | ||
b9908bf9 | 3247 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3248 | /* Let cert callback update client certificates if required */ |
3249 | if (s->cert->cert_cb) { | |
3250 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3251 | if (i < 0) { | |
3252 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3253 | return WORK_MORE_A; |
0f113f3e MC |
3254 | } |
3255 | if (i == 0) { | |
3256 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3257 | ossl_statem_set_error(s); |
0f113f3e MC |
3258 | return 0; |
3259 | } | |
3260 | s->rwstate = SSL_NOTHING; | |
3261 | } | |
3262 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3263 | return WORK_FINISHED_CONTINUE; |
3264 | ||
3265 | /* Fall through to WORK_MORE_B */ | |
3266 | wst = WORK_MORE_B; | |
0f113f3e MC |
3267 | } |
3268 | ||
3269 | /* We need to get a client cert */ | |
b9908bf9 | 3270 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3271 | /* |
3272 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3273 | * return(-1); We then get retied later | |
3274 | */ | |
0f113f3e MC |
3275 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3276 | if (i < 0) { | |
3277 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3278 | return WORK_MORE_B; |
0f113f3e MC |
3279 | } |
3280 | s->rwstate = SSL_NOTHING; | |
3281 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3282 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3283 | i = 0; | |
3284 | } else if (i == 1) { | |
3285 | i = 0; | |
b9908bf9 | 3286 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3287 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3288 | } | |
3289 | ||
222561fe | 3290 | X509_free(x509); |
25aaa98a | 3291 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3292 | if (i && !ssl3_check_client_certificate(s)) |
3293 | i = 0; | |
3294 | if (i == 0) { | |
3295 | if (s->version == SSL3_VERSION) { | |
3296 | s->s3->tmp.cert_req = 0; | |
3297 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3298 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3299 | } else { |
3300 | s->s3->tmp.cert_req = 2; | |
124037fd | 3301 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3302 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3303 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3304 | return 0; |
3305 | } | |
0f113f3e MC |
3306 | } |
3307 | } | |
3308 | ||
b9908bf9 | 3309 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3310 | } |
3311 | ||
b9908bf9 MC |
3312 | /* Shouldn't ever get here */ |
3313 | return WORK_ERROR; | |
3314 | } | |
3315 | ||
7cea05dc | 3316 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3317 | { |
0baed5e9 | 3318 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3319 | |
3320 | /* | |
3321 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3322 | * later | |
3323 | */ | |
3324 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3325 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3326 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3327 | : s->cert->key, |
3328 | &al)) { | |
b9908bf9 | 3329 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
f7e393be MC |
3330 | goto err; |
3331 | } | |
3332 | ||
3333 | if (SSL_IS_TLS13(s) | |
3334 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3335 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3336 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3337 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, | |
3338 | SSL_R_CANNOT_CHANGE_CIPHER); | |
3339 | goto err; | |
0f113f3e | 3340 | } |
b9908bf9 MC |
3341 | |
3342 | return 1; | |
f7e393be MC |
3343 | err: |
3344 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3345 | return 0; | |
0f113f3e MC |
3346 | } |
3347 | ||
3348 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3349 | |
36d16f8e | 3350 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3351 | { |
60f43e9e RL |
3352 | int i; |
3353 | #ifndef OPENSSL_NO_EC | |
3354 | int idx; | |
3355 | #endif | |
0f113f3e MC |
3356 | long alg_k, alg_a; |
3357 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3358 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3359 | |
0f113f3e MC |
3360 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3361 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3362 | |
0f113f3e | 3363 | /* we don't have a certificate */ |
55a9a16f | 3364 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3365 | return (1); |
d02b48c6 | 3366 | |
0f113f3e | 3367 | /* This is the passed certificate */ |
d02b48c6 | 3368 | |
10bf4fc2 | 3369 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3370 | idx = s->session->peer_type; |
0f113f3e | 3371 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3372 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3373 | /* check failed */ |
3374 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3375 | goto f_err; | |
3376 | } else { | |
3377 | return 1; | |
3378 | } | |
3379 | } else if (alg_a & SSL_aECDSA) { | |
3380 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3381 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3382 | goto f_err; | |
0f113f3e MC |
3383 | } |
3384 | #endif | |
8382fd3a | 3385 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3386 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3387 | |
3388 | /* Check that we have a certificate if we require one */ | |
3389 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3390 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3391 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3392 | goto f_err; | |
3393 | } | |
bc36ee62 | 3394 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3395 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3396 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3397 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3398 | goto f_err; | |
3399 | } | |
d02b48c6 | 3400 | #endif |
bc36ee62 | 3401 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3402 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3403 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3404 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3405 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3406 | goto f_err; | |
0f113f3e | 3407 | } |
79df9d62 | 3408 | #endif |
bc36ee62 | 3409 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3410 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3411 | al = SSL_AD_INTERNAL_ERROR; |
3412 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3413 | goto f_err; |
0f113f3e | 3414 | } |
d02b48c6 RE |
3415 | #endif |
3416 | ||
0f113f3e MC |
3417 | return (1); |
3418 | f_err: | |
26c79d56 | 3419 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3420 | return (0); |
3421 | } | |
3422 | ||
e481f9b9 | 3423 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3424 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3425 | { |
15e6be6c MC |
3426 | size_t len, padding_len; |
3427 | unsigned char *padding = NULL; | |
15e6be6c | 3428 | |
aff8c126 | 3429 | len = s->ext.npn_len; |
b9908bf9 | 3430 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3431 | |
aff8c126 | 3432 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3433 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3434 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3435 | goto err; | |
3436 | } | |
3437 | ||
3438 | memset(padding, 0, padding_len); | |
3439 | ||
b9908bf9 | 3440 | return 1; |
15e6be6c | 3441 | err: |
15e6be6c MC |
3442 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3443 | return 0; | |
b9908bf9 | 3444 | } |
6434abbf | 3445 | #endif |
368888bc | 3446 | |
c7f47786 MC |
3447 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3448 | { | |
3449 | if (PACKET_remaining(pkt) > 0) { | |
3450 | /* should contain no data */ | |
3451 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3452 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3453 | ossl_statem_set_error(s); | |
3454 | return MSG_PROCESS_ERROR; | |
3455 | } | |
3456 | ||
3457 | /* | |
1f04f23e MC |
3458 | * This is a historical discrepancy (not in the RFC) maintained for |
3459 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3460 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3461 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3462 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3463 | */ |
3464 | if (SSL_IS_DTLS(s)) | |
3465 | SSL_renegotiate(s); | |
3466 | else | |
3467 | SSL_renegotiate_abbreviated(s); | |
3468 | ||
3469 | return MSG_PROCESS_FINISHED_READING; | |
3470 | } | |
3471 | ||
e46f2334 MC |
3472 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3473 | { | |
3474 | int al = SSL_AD_INTERNAL_ERROR; | |
3475 | PACKET extensions; | |
3434f40b | 3476 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3477 | |
e46f2334 MC |
3478 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3479 | al = SSL_AD_DECODE_ERROR; | |
3480 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3481 | goto err; | |
3482 | } | |
3483 | ||
fe874d27 MC |
3484 | if (!tls_collect_extensions(s, &extensions, |
3485 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
3486 | &al, NULL) | |
3487 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
f97d4c37 | 3488 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3489 | goto err; |
3490 | ||
1b0286a3 | 3491 | OPENSSL_free(rawexts); |
e46f2334 MC |
3492 | return MSG_PROCESS_CONTINUE_READING; |
3493 | ||
3494 | err: | |
3495 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3496 | ossl_statem_set_error(s); | |
1b0286a3 | 3497 | OPENSSL_free(rawexts); |
e46f2334 MC |
3498 | return MSG_PROCESS_ERROR; |
3499 | } | |
3500 | ||
368888bc | 3501 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3502 | { |
3503 | int i = 0; | |
368888bc | 3504 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3505 | if (s->ctx->client_cert_engine) { |
3506 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3507 | SSL_get_client_CA_list(s), | |
3508 | px509, ppkey, NULL, NULL, NULL); | |
3509 | if (i != 0) | |
3510 | return i; | |
3511 | } | |
3512 | #endif | |
3513 | if (s->ctx->client_cert_cb) | |
3514 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3515 | return i; | |
3516 | } | |
d45ba43d | 3517 | |
ae2f7b37 | 3518 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3519 | { |
2c7b4dbc MC |
3520 | int i; |
3521 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3522 | int empty_reneg_info_scsv = !s->renegotiate; |
3523 | /* Set disabled masks for this session */ | |
3524 | ssl_set_client_disabled(s); | |
3525 | ||
3526 | if (sk == NULL) | |
3527 | return (0); | |
d45ba43d | 3528 | |
2c7b4dbc MC |
3529 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3530 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3531 | # error Max cipher length too short | |
3532 | # endif | |
3533 | /* | |
3534 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3535 | * chop number of supported ciphers to keep it well below this if we | |
3536 | * use TLS v1.2 | |
3537 | */ | |
3538 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3539 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3540 | else | |
3541 | #endif | |
3542 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3543 | maxlen = 0xfffe; | |
3544 | ||
3545 | if (empty_reneg_info_scsv) | |
3546 | maxlen -= 2; | |
3547 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3548 | maxlen -= 2; | |
3549 | ||
3550 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3551 | const SSL_CIPHER *c; | |
3552 | ||
d45ba43d MC |
3553 | c = sk_SSL_CIPHER_value(sk, i); |
3554 | /* Skip disabled ciphers */ | |
3555 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3556 | continue; | |
2c7b4dbc MC |
3557 | |
3558 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3559 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3560 | return 0; | |
3561 | } | |
3562 | ||
3563 | totlen += len; | |
d45ba43d | 3564 | } |
2c7b4dbc MC |
3565 | |
3566 | if (totlen == 0) { | |
3567 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3568 | return 0; | |
3569 | } | |
3570 | ||
3571 | if (totlen != 0) { | |
d45ba43d MC |
3572 | if (empty_reneg_info_scsv) { |
3573 | static SSL_CIPHER scsv = { | |
3574 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3575 | }; | |
2c7b4dbc MC |
3576 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3577 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3578 | return 0; | |
3579 | } | |
d45ba43d MC |
3580 | } |
3581 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3582 | static SSL_CIPHER scsv = { | |
3583 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3584 | }; | |
2c7b4dbc MC |
3585 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3586 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3587 | return 0; | |
3588 | } | |
d45ba43d MC |
3589 | } |
3590 | } | |
3591 | ||
2c7b4dbc | 3592 | return 1; |
d45ba43d | 3593 | } |
ef6c191b MC |
3594 | |
3595 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3596 | { | |
3597 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3598 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
3599 | SSLerr(SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3600 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3601 | return 0; | |
3602 | } | |
3603 | ||
3604 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3605 | return 1; | |
3606 | } |