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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); |
0f113f3e | 68 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 69 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 70 | WPACKET *pkt); |
ea262260 | 71 | |
61ae935a MC |
72 | /* |
73 | * Is a CertificateRequest message allowed at the moment or not? | |
74 | * | |
75 | * Return values are: | |
76 | * 1: Yes | |
77 | * 0: No | |
78 | */ | |
7ab09630 | 79 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
80 | { |
81 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 82 | if ((s->version > SSL3_VERSION |
a230b26e EK |
83 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
84 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
85 | return 0; |
86 | ||
87 | return 1; | |
88 | } | |
89 | ||
90 | /* | |
a455d0f6 | 91 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
92 | * |
93 | * Return values are: | |
94 | * 1: Yes | |
95 | * 0: No | |
96 | */ | |
a455d0f6 | 97 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
98 | { |
99 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
100 | ||
101 | /* | |
102 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 103 | * ciphersuite or for SRP |
61ae935a | 104 | */ |
a455d0f6 MC |
105 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
106 | | SSL_kSRP)) { | |
107 | return 1; | |
61ae935a MC |
108 | } |
109 | ||
a455d0f6 | 110 | return 0; |
61ae935a MC |
111 | } |
112 | ||
0f1e51ea MC |
113 | /* |
114 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
115 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
116 | * server. The message type that the server has sent is provided in |mt|. The | |
117 | * current state is in |s->statem.hand_state|. | |
118 | * | |
94ed2c67 MC |
119 | * Return values are 1 for success (transition allowed) and 0 on error |
120 | * (transition not allowed) | |
0f1e51ea MC |
121 | */ |
122 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
123 | { | |
124 | OSSL_STATEM *st = &s->statem; | |
125 | ||
94ed2c67 MC |
126 | /* |
127 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
128 | * we will update this to look more like real TLSv1.3 | |
129 | */ | |
130 | ||
0f1e51ea MC |
131 | /* |
132 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
133 | * yet negotiated TLSv1.3 at that point so that is handled by | |
134 | * ossl_statem_client_read_transition() | |
135 | */ | |
136 | ||
137 | switch (st->hand_state) { | |
138 | default: | |
139 | break; | |
140 | ||
3847d426 MC |
141 | case TLS_ST_CW_CLNT_HELLO: |
142 | /* | |
143 | * This must a ClientHello following a HelloRetryRequest, so the only | |
144 | * thing we can get now is a ServerHello. | |
145 | */ | |
146 | if (mt == SSL3_MT_SERVER_HELLO) { | |
147 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
148 | return 1; | |
149 | } | |
150 | break; | |
151 | ||
0f1e51ea | 152 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
153 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
154 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
155 | return 1; | |
156 | } | |
157 | break; | |
158 | ||
159 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 160 | if (s->hit) { |
92760c21 MC |
161 | if (mt == SSL3_MT_FINISHED) { |
162 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
163 | return 1; |
164 | } | |
165 | } else { | |
92760c21 MC |
166 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
167 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
168 | return 1; | |
f5ca0b04 MC |
169 | } |
170 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
171 | st->hand_state = TLS_ST_CR_CERT; |
172 | return 1; | |
173 | } | |
174 | } | |
175 | break; | |
176 | ||
92760c21 MC |
177 | case TLS_ST_CR_CERT_REQ: |
178 | if (mt == SSL3_MT_CERTIFICATE) { | |
179 | st->hand_state = TLS_ST_CR_CERT; | |
180 | return 1; | |
181 | } | |
182 | break; | |
183 | ||
0f1e51ea | 184 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
185 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
186 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
187 | return 1; | |
188 | } | |
189 | break; | |
190 | ||
191 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
192 | if (mt == SSL3_MT_FINISHED) { |
193 | st->hand_state = TLS_ST_CR_FINISHED; | |
194 | return 1; | |
195 | } | |
196 | break; | |
cc2455bf MC |
197 | |
198 | case TLS_ST_OK: | |
49e7fe12 MC |
199 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING |
200 | && mt == SSL3_MT_SERVER_HELLO) { | |
201 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
202 | return 1; | |
203 | } | |
cc2455bf MC |
204 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
205 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
206 | return 1; | |
207 | } | |
e1c3de44 MC |
208 | if (mt == SSL3_MT_KEY_UPDATE) { |
209 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
210 | return 1; | |
211 | } | |
cc2455bf | 212 | break; |
0f1e51ea MC |
213 | } |
214 | ||
0f1e51ea | 215 | /* No valid transition found */ |
0f1e51ea MC |
216 | return 0; |
217 | } | |
218 | ||
61ae935a | 219 | /* |
8481f583 MC |
220 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
221 | * handshake state transitions when the client is reading messages from the | |
222 | * server. The message type that the server has sent is provided in |mt|. The | |
223 | * current state is in |s->statem.hand_state|. | |
61ae935a | 224 | * |
94ed2c67 MC |
225 | * Return values are 1 for success (transition allowed) and 0 on error |
226 | * (transition not allowed) | |
61ae935a | 227 | */ |
8481f583 | 228 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 229 | { |
d6f1a6e9 | 230 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 231 | int ske_expected; |
61ae935a | 232 | |
0f1e51ea | 233 | /* |
3847d426 MC |
234 | * Note that after writing the first ClientHello we don't know what version |
235 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 236 | */ |
f5ca0b04 | 237 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
238 | if (!ossl_statem_client13_read_transition(s, mt)) |
239 | goto err; | |
240 | return 1; | |
241 | } | |
0f1e51ea | 242 | |
a230b26e | 243 | switch (st->hand_state) { |
f3b3d7f0 RS |
244 | default: |
245 | break; | |
246 | ||
61ae935a MC |
247 | case TLS_ST_CW_CLNT_HELLO: |
248 | if (mt == SSL3_MT_SERVER_HELLO) { | |
249 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
250 | return 1; | |
251 | } | |
252 | ||
253 | if (SSL_IS_DTLS(s)) { | |
254 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
255 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
256 | return 1; | |
257 | } | |
3847d426 MC |
258 | } else { |
259 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
260 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
261 | return 1; | |
262 | } | |
61ae935a MC |
263 | } |
264 | break; | |
265 | ||
266 | case TLS_ST_CR_SRVR_HELLO: | |
267 | if (s->hit) { | |
aff8c126 | 268 | if (s->ext.ticket_expected) { |
61ae935a MC |
269 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
270 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
271 | return 1; | |
272 | } | |
273 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
274 | st->hand_state = TLS_ST_CR_CHANGE; | |
275 | return 1; | |
276 | } | |
277 | } else { | |
278 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
279 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
280 | return 1; | |
ad3819c2 | 281 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
282 | && s->ext.session_secret_cb != NULL |
283 | && s->session->ext.tick != NULL | |
a230b26e | 284 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
285 | /* |
286 | * Normally, we can tell if the server is resuming the session | |
287 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
288 | * the next server message after the ServerHello to determine if | |
289 | * the server is resuming. | |
290 | */ | |
291 | s->hit = 1; | |
292 | st->hand_state = TLS_ST_CR_CHANGE; | |
293 | return 1; | |
61ae935a | 294 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 295 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
296 | if (mt == SSL3_MT_CERTIFICATE) { |
297 | st->hand_state = TLS_ST_CR_CERT; | |
298 | return 1; | |
299 | } | |
300 | } else { | |
a455d0f6 | 301 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
302 | /* SKE is optional for some PSK ciphersuites */ |
303 | if (ske_expected | |
a230b26e EK |
304 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
305 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
306 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
307 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
308 | return 1; | |
309 | } | |
310 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
311 | && cert_req_allowed(s)) { |
312 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
313 | return 1; | |
a455d0f6 | 314 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
315 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
316 | return 1; | |
61ae935a MC |
317 | } |
318 | } | |
319 | } | |
320 | break; | |
321 | ||
322 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
323 | /* |
324 | * The CertificateStatus message is optional even if | |
aff8c126 | 325 | * |ext.status_expected| is set |
bb1aaab4 | 326 | */ |
aff8c126 | 327 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
328 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
329 | return 1; | |
a455d0f6 MC |
330 | } |
331 | /* Fall through */ | |
332 | ||
333 | case TLS_ST_CR_CERT_STATUS: | |
334 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 335 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
336 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
337 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
338 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
339 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
340 | return 1; | |
61ae935a | 341 | } |
672f3337 | 342 | goto err; |
61ae935a | 343 | } |
a455d0f6 | 344 | /* Fall through */ |
61ae935a | 345 | |
a455d0f6 MC |
346 | case TLS_ST_CR_KEY_EXCH: |
347 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
348 | if (cert_req_allowed(s)) { | |
61ae935a MC |
349 | st->hand_state = TLS_ST_CR_CERT_REQ; |
350 | return 1; | |
61ae935a | 351 | } |
672f3337 | 352 | goto err; |
61ae935a | 353 | } |
a455d0f6 | 354 | /* Fall through */ |
61ae935a MC |
355 | |
356 | case TLS_ST_CR_CERT_REQ: | |
357 | if (mt == SSL3_MT_SERVER_DONE) { | |
358 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
359 | return 1; | |
360 | } | |
361 | break; | |
362 | ||
363 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 364 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
365 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
366 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
367 | return 1; | |
368 | } | |
61ae935a MC |
369 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
370 | st->hand_state = TLS_ST_CR_CHANGE; | |
371 | return 1; | |
372 | } | |
373 | break; | |
374 | ||
375 | case TLS_ST_CR_SESSION_TICKET: | |
376 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
377 | st->hand_state = TLS_ST_CR_CHANGE; | |
378 | return 1; | |
379 | } | |
380 | break; | |
381 | ||
382 | case TLS_ST_CR_CHANGE: | |
383 | if (mt == SSL3_MT_FINISHED) { | |
384 | st->hand_state = TLS_ST_CR_FINISHED; | |
385 | return 1; | |
386 | } | |
387 | break; | |
c7f47786 MC |
388 | |
389 | case TLS_ST_OK: | |
49e7fe12 MC |
390 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) { |
391 | /* | |
392 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
393 | * data. The only thing allowed now is a ServerHello or a | |
394 | * HelloRetryRequest. | |
395 | */ | |
396 | if (mt == SSL3_MT_SERVER_HELLO) { | |
397 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
398 | return 1; | |
399 | } | |
400 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
401 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
402 | return 1; | |
403 | } | |
404 | } else if (mt == SSL3_MT_HELLO_REQUEST) { | |
c7f47786 MC |
405 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
406 | return 1; | |
407 | } | |
408 | break; | |
61ae935a MC |
409 | } |
410 | ||
672f3337 | 411 | err: |
61ae935a | 412 | /* No valid transition found */ |
672f3337 | 413 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 414 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
415 | return 0; |
416 | } | |
417 | ||
418 | /* | |
0f1e51ea MC |
419 | * ossl_statem_client13_write_transition() works out what handshake state to |
420 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
421 | * server. | |
0f1e51ea MC |
422 | */ |
423 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
424 | { | |
425 | OSSL_STATEM *st = &s->statem; | |
426 | ||
427 | /* | |
3847d426 MC |
428 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
429 | * TLSv1.3 yet at that point. They are handled by | |
430 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
431 | */ |
432 | switch (st->hand_state) { | |
433 | default: | |
434 | /* Shouldn't happen */ | |
435 | return WRITE_TRAN_ERROR; | |
436 | ||
3847d426 MC |
437 | case TLS_ST_CW_CLNT_HELLO: |
438 | /* We only hit this in the case of HelloRetryRequest */ | |
439 | return WRITE_TRAN_FINISHED; | |
440 | ||
441 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
442 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
443 | return WRITE_TRAN_CONTINUE; | |
444 | ||
92760c21 | 445 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 446 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 447 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
448 | return WRITE_TRAN_CONTINUE; |
449 | ||
450 | case TLS_ST_CW_CERT: | |
451 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 452 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 453 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
454 | return WRITE_TRAN_CONTINUE; |
455 | ||
456 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
457 | st->hand_state = TLS_ST_CW_FINISHED; |
458 | return WRITE_TRAN_CONTINUE; | |
459 | ||
e1c3de44 | 460 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
461 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
462 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
463 | return WRITE_TRAN_CONTINUE; | |
464 | } | |
465 | /* Fall through */ | |
466 | ||
9412b3ad | 467 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 468 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 469 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
470 | st->hand_state = TLS_ST_OK; |
471 | ossl_statem_set_in_init(s, 0); | |
472 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
473 | |
474 | case TLS_ST_OK: | |
9412b3ad MC |
475 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
476 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
477 | return WRITE_TRAN_CONTINUE; | |
478 | } | |
479 | ||
480 | /* Try to read from the server instead */ | |
cc2455bf | 481 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
482 | } |
483 | } | |
484 | ||
485 | /* | |
486 | * ossl_statem_client_write_transition() works out what handshake state to | |
487 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 488 | */ |
8481f583 | 489 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 490 | { |
d6f1a6e9 | 491 | OSSL_STATEM *st = &s->statem; |
61ae935a | 492 | |
0f1e51ea MC |
493 | /* |
494 | * Note that immediately before/after a ClientHello we don't know what | |
495 | * version we are going to negotiate yet, so we don't take this branch until | |
496 | * later | |
497 | */ | |
f5ca0b04 | 498 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
499 | return ossl_statem_client13_write_transition(s); |
500 | ||
a230b26e | 501 | switch (st->hand_state) { |
f3b3d7f0 RS |
502 | default: |
503 | /* Shouldn't happen */ | |
504 | return WRITE_TRAN_ERROR; | |
505 | ||
a230b26e | 506 | case TLS_ST_OK: |
49e7fe12 MC |
507 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) { |
508 | /* | |
509 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
510 | * actually selected a version yet. | |
511 | */ | |
512 | return WRITE_TRAN_FINISHED; | |
513 | } | |
c7f47786 MC |
514 | if (!s->renegotiate) { |
515 | /* | |
516 | * We haven't requested a renegotiation ourselves so we must have | |
517 | * received a message from the server. Better read it. | |
518 | */ | |
519 | return WRITE_TRAN_FINISHED; | |
520 | } | |
a230b26e EK |
521 | /* Renegotiation - fall through */ |
522 | case TLS_ST_BEFORE: | |
523 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
524 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 525 | |
a230b26e | 526 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
527 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
528 | /* | |
529 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
530 | * actually selected a version yet. | |
531 | */ | |
532 | st->hand_state = TLS_ST_OK; | |
533 | ossl_statem_set_in_init(s, 0); | |
534 | return WRITE_TRAN_CONTINUE; | |
535 | } | |
a230b26e EK |
536 | /* |
537 | * No transition at the end of writing because we don't know what | |
538 | * we will be sent | |
539 | */ | |
540 | return WRITE_TRAN_FINISHED; | |
61ae935a | 541 | |
a230b26e EK |
542 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
543 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
544 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 545 | |
a230b26e EK |
546 | case TLS_ST_CR_SRVR_DONE: |
547 | if (s->s3->tmp.cert_req) | |
548 | st->hand_state = TLS_ST_CW_CERT; | |
549 | else | |
61ae935a | 550 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 551 | return WRITE_TRAN_CONTINUE; |
61ae935a | 552 | |
a230b26e EK |
553 | case TLS_ST_CW_CERT: |
554 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
555 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 556 | |
a230b26e EK |
557 | case TLS_ST_CW_KEY_EXCH: |
558 | /* | |
559 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
560 | * sent, but no verify packet is sent | |
561 | */ | |
562 | /* | |
563 | * XXX: For now, we do not support client authentication in ECDH | |
564 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
565 | * need to skip the certificate verify message when client's | |
566 | * ECDH public key is sent inside the client certificate. | |
567 | */ | |
568 | if (s->s3->tmp.cert_req == 1) { | |
569 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
570 | } else { | |
61ae935a | 571 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
572 | } |
573 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
574 | st->hand_state = TLS_ST_CW_CHANGE; | |
575 | } | |
576 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 577 | |
a230b26e EK |
578 | case TLS_ST_CW_CERT_VRFY: |
579 | st->hand_state = TLS_ST_CW_CHANGE; | |
580 | return WRITE_TRAN_CONTINUE; | |
581 | ||
582 | case TLS_ST_CW_CHANGE: | |
61ae935a | 583 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 584 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 585 | #else |
aff8c126 | 586 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
587 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
588 | else | |
589 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 590 | #endif |
a230b26e | 591 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
592 | |
593 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
594 | case TLS_ST_CW_NEXT_PROTO: |
595 | st->hand_state = TLS_ST_CW_FINISHED; | |
596 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
597 | #endif |
598 | ||
a230b26e EK |
599 | case TLS_ST_CW_FINISHED: |
600 | if (s->hit) { | |
601 | st->hand_state = TLS_ST_OK; | |
602 | ossl_statem_set_in_init(s, 0); | |
603 | return WRITE_TRAN_CONTINUE; | |
604 | } else { | |
605 | return WRITE_TRAN_FINISHED; | |
606 | } | |
61ae935a | 607 | |
a230b26e EK |
608 | case TLS_ST_CR_FINISHED: |
609 | if (s->hit) { | |
610 | st->hand_state = TLS_ST_CW_CHANGE; | |
611 | return WRITE_TRAN_CONTINUE; | |
612 | } else { | |
613 | st->hand_state = TLS_ST_OK; | |
614 | ossl_statem_set_in_init(s, 0); | |
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; | |
632 | ossl_statem_set_in_init(s, 0); | |
633 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
634 | } |
635 | } | |
636 | ||
637 | /* | |
638 | * Perform any pre work that needs to be done prior to sending a message from | |
639 | * the client to the server. | |
640 | */ | |
8481f583 | 641 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 642 | { |
d6f1a6e9 | 643 | OSSL_STATEM *st = &s->statem; |
61ae935a | 644 | |
a230b26e | 645 | switch (st->hand_state) { |
f3b3d7f0 RS |
646 | default: |
647 | /* No pre work to be done */ | |
648 | break; | |
649 | ||
61ae935a MC |
650 | case TLS_ST_CW_CLNT_HELLO: |
651 | s->shutdown = 0; | |
652 | if (SSL_IS_DTLS(s)) { | |
653 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
654 | if (!ssl3_init_finished_mac(s)) { |
655 | ossl_statem_set_error(s); | |
656 | return WORK_ERROR; | |
657 | } | |
61ae935a MC |
658 | } |
659 | break; | |
660 | ||
61ae935a MC |
661 | case TLS_ST_CW_CHANGE: |
662 | if (SSL_IS_DTLS(s)) { | |
663 | if (s->hit) { | |
664 | /* | |
665 | * We're into the last flight so we don't retransmit these | |
666 | * messages unless we need to. | |
667 | */ | |
668 | st->use_timer = 0; | |
669 | } | |
670 | #ifndef OPENSSL_NO_SCTP | |
671 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
672 | return dtls_wait_for_dry(s); | |
673 | #endif | |
674 | } | |
f3b3d7f0 | 675 | break; |
61ae935a MC |
676 | |
677 | case TLS_ST_OK: | |
30f05b19 | 678 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
679 | } |
680 | ||
681 | return WORK_FINISHED_CONTINUE; | |
682 | } | |
683 | ||
684 | /* | |
685 | * Perform any work that needs to be done after sending a message from the | |
686 | * client to the server. | |
687 | */ | |
8481f583 | 688 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 689 | { |
d6f1a6e9 | 690 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
691 | |
692 | s->init_num = 0; | |
693 | ||
a230b26e | 694 | switch (st->hand_state) { |
f3b3d7f0 RS |
695 | default: |
696 | /* No post work to be done */ | |
697 | break; | |
698 | ||
61ae935a | 699 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 700 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 701 | return WORK_MORE_A; |
46417569 | 702 | |
61ae935a MC |
703 | if (SSL_IS_DTLS(s)) { |
704 | /* Treat the next message as the first packet */ | |
705 | s->first_packet = 1; | |
706 | } | |
707 | break; | |
708 | ||
709 | case TLS_ST_CW_KEY_EXCH: | |
710 | if (tls_client_key_exchange_post_work(s) == 0) | |
711 | return WORK_ERROR; | |
712 | break; | |
713 | ||
714 | case TLS_ST_CW_CHANGE: | |
715 | s->session->cipher = s->s3->tmp.new_cipher; | |
716 | #ifdef OPENSSL_NO_COMP | |
717 | s->session->compress_meth = 0; | |
718 | #else | |
719 | if (s->s3->tmp.new_compression == NULL) | |
720 | s->session->compress_meth = 0; | |
721 | else | |
722 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
723 | #endif | |
724 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
725 | return WORK_ERROR; | |
726 | ||
727 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
728 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
729 | return WORK_ERROR; | |
730 | ||
731 | if (SSL_IS_DTLS(s)) { | |
732 | #ifndef OPENSSL_NO_SCTP | |
733 | if (s->hit) { | |
734 | /* | |
735 | * Change to new shared key of SCTP-Auth, will be ignored if | |
736 | * no SCTP used. | |
737 | */ | |
738 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
739 | 0, NULL); | |
740 | } | |
741 | #endif | |
742 | ||
743 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
744 | } | |
745 | break; | |
746 | ||
747 | case TLS_ST_CW_FINISHED: | |
748 | #ifndef OPENSSL_NO_SCTP | |
749 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
750 | /* | |
751 | * Change to new shared key of SCTP-Auth, will be ignored if | |
752 | * no SCTP used. | |
753 | */ | |
754 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
755 | 0, NULL); | |
756 | } | |
757 | #endif | |
758 | if (statem_flush(s) != 1) | |
759 | return WORK_MORE_B; | |
92760c21 MC |
760 | |
761 | if (SSL_IS_TLS13(s)) { | |
762 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
763 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
764 | return WORK_ERROR; | |
765 | } | |
61ae935a | 766 | break; |
9412b3ad MC |
767 | |
768 | case TLS_ST_CW_KEY_UPDATE: | |
769 | if (statem_flush(s) != 1) | |
770 | return WORK_MORE_A; | |
57389a32 MC |
771 | if (!tls13_update_key(s, 1)) |
772 | return WORK_ERROR; | |
9412b3ad | 773 | break; |
61ae935a MC |
774 | } |
775 | ||
776 | return WORK_FINISHED_CONTINUE; | |
777 | } | |
778 | ||
779 | /* | |
6392fb8e MC |
780 | * Get the message construction function and message type for sending from the |
781 | * client | |
61ae935a MC |
782 | * |
783 | * Valid return values are: | |
784 | * 1: Success | |
785 | * 0: Error | |
786 | */ | |
6392fb8e | 787 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 788 | confunc_f *confunc, int *mt) |
61ae935a | 789 | { |
d6f1a6e9 | 790 | OSSL_STATEM *st = &s->statem; |
61ae935a | 791 | |
4a01c59f MC |
792 | switch (st->hand_state) { |
793 | default: | |
794 | /* Shouldn't happen */ | |
795 | return 0; | |
796 | ||
797 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 798 | if (SSL_IS_DTLS(s)) |
6392fb8e | 799 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 800 | else |
6392fb8e MC |
801 | *confunc = tls_construct_change_cipher_spec; |
802 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
803 | break; |
804 | ||
805 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
806 | *confunc = tls_construct_client_hello; |
807 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
808 | break; |
809 | ||
810 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
811 | *confunc = tls_construct_client_certificate; |
812 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
813 | break; |
814 | ||
815 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
816 | *confunc = tls_construct_client_key_exchange; |
817 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
818 | break; |
819 | ||
820 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 821 | *confunc = tls_construct_cert_verify; |
6392fb8e | 822 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 823 | break; |
61ae935a MC |
824 | |
825 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 826 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
827 | *confunc = tls_construct_next_proto; |
828 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 829 | break; |
61ae935a | 830 | #endif |
4a01c59f | 831 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
832 | *confunc = tls_construct_finished; |
833 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 834 | break; |
9412b3ad MC |
835 | |
836 | case TLS_ST_CW_KEY_UPDATE: | |
837 | *confunc = tls_construct_key_update; | |
838 | *mt = SSL3_MT_KEY_UPDATE; | |
839 | break; | |
4a01c59f | 840 | } |
5923ad4b | 841 | |
5923ad4b | 842 | return 1; |
61ae935a MC |
843 | } |
844 | ||
845 | /* | |
846 | * Returns the maximum allowed length for the current message that we are | |
847 | * reading. Excludes the message header. | |
848 | */ | |
eda75751 | 849 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 850 | { |
d6f1a6e9 | 851 | OSSL_STATEM *st = &s->statem; |
61ae935a | 852 | |
a230b26e | 853 | switch (st->hand_state) { |
f3b3d7f0 RS |
854 | default: |
855 | /* Shouldn't happen */ | |
856 | return 0; | |
857 | ||
a230b26e EK |
858 | case TLS_ST_CR_SRVR_HELLO: |
859 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 860 | |
a230b26e EK |
861 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
862 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 863 | |
3847d426 MC |
864 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
865 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
866 | ||
a230b26e EK |
867 | case TLS_ST_CR_CERT: |
868 | return s->max_cert_list; | |
61ae935a | 869 | |
2c5dfdc3 MC |
870 | case TLS_ST_CR_CERT_VRFY: |
871 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
872 | ||
a230b26e EK |
873 | case TLS_ST_CR_CERT_STATUS: |
874 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 875 | |
a230b26e EK |
876 | case TLS_ST_CR_KEY_EXCH: |
877 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 878 | |
a230b26e EK |
879 | case TLS_ST_CR_CERT_REQ: |
880 | /* | |
881 | * Set to s->max_cert_list for compatibility with previous releases. In | |
882 | * practice these messages can get quite long if servers are configured | |
883 | * to provide a long list of acceptable CAs | |
884 | */ | |
885 | return s->max_cert_list; | |
61ae935a | 886 | |
a230b26e EK |
887 | case TLS_ST_CR_SRVR_DONE: |
888 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 889 | |
a230b26e EK |
890 | case TLS_ST_CR_CHANGE: |
891 | if (s->version == DTLS1_BAD_VER) | |
892 | return 3; | |
893 | return CCS_MAX_LENGTH; | |
61ae935a | 894 | |
a230b26e EK |
895 | case TLS_ST_CR_SESSION_TICKET: |
896 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 897 | |
a230b26e EK |
898 | case TLS_ST_CR_FINISHED: |
899 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
900 | |
901 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
902 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
903 | |
904 | case TLS_ST_CR_KEY_UPDATE: | |
905 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 906 | } |
61ae935a MC |
907 | } |
908 | ||
909 | /* | |
910 | * Process a message that the client has been received from the server. | |
911 | */ | |
8481f583 | 912 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 913 | { |
d6f1a6e9 | 914 | OSSL_STATEM *st = &s->statem; |
61ae935a | 915 | |
a230b26e | 916 | switch (st->hand_state) { |
f3b3d7f0 RS |
917 | default: |
918 | /* Shouldn't happen */ | |
919 | return MSG_PROCESS_ERROR; | |
920 | ||
a230b26e EK |
921 | case TLS_ST_CR_SRVR_HELLO: |
922 | return tls_process_server_hello(s, pkt); | |
61ae935a | 923 | |
a230b26e EK |
924 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
925 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 926 | |
3847d426 MC |
927 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
928 | return tls_process_hello_retry_request(s, pkt); | |
929 | ||
a230b26e EK |
930 | case TLS_ST_CR_CERT: |
931 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 932 | |
2c5dfdc3 MC |
933 | case TLS_ST_CR_CERT_VRFY: |
934 | return tls_process_cert_verify(s, pkt); | |
935 | ||
a230b26e EK |
936 | case TLS_ST_CR_CERT_STATUS: |
937 | return tls_process_cert_status(s, pkt); | |
61ae935a | 938 | |
a230b26e EK |
939 | case TLS_ST_CR_KEY_EXCH: |
940 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 941 | |
a230b26e EK |
942 | case TLS_ST_CR_CERT_REQ: |
943 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 944 | |
a230b26e EK |
945 | case TLS_ST_CR_SRVR_DONE: |
946 | return tls_process_server_done(s, pkt); | |
61ae935a | 947 | |
a230b26e EK |
948 | case TLS_ST_CR_CHANGE: |
949 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 950 | |
a230b26e EK |
951 | case TLS_ST_CR_SESSION_TICKET: |
952 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 953 | |
a230b26e EK |
954 | case TLS_ST_CR_FINISHED: |
955 | return tls_process_finished(s, pkt); | |
e46f2334 | 956 | |
c7f47786 MC |
957 | case TLS_ST_CR_HELLO_REQ: |
958 | return tls_process_hello_req(s, pkt); | |
959 | ||
e46f2334 MC |
960 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
961 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
962 | |
963 | case TLS_ST_CR_KEY_UPDATE: | |
964 | return tls_process_key_update(s, pkt); | |
61ae935a | 965 | } |
61ae935a MC |
966 | } |
967 | ||
968 | /* | |
969 | * Perform any further processing required following the receipt of a message | |
970 | * from the server | |
971 | */ | |
8481f583 | 972 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 973 | { |
d6f1a6e9 | 974 | OSSL_STATEM *st = &s->statem; |
61ae935a | 975 | |
a230b26e | 976 | switch (st->hand_state) { |
f3b3d7f0 RS |
977 | default: |
978 | /* Shouldn't happen */ | |
979 | return WORK_ERROR; | |
980 | ||
05c4f1d5 MC |
981 | case TLS_ST_CR_CERT_REQ: |
982 | return tls_prepare_client_certificate(s, wst); | |
983 | ||
61ae935a MC |
984 | #ifndef OPENSSL_NO_SCTP |
985 | case TLS_ST_CR_SRVR_DONE: | |
986 | /* We only get here if we are using SCTP and we are renegotiating */ | |
987 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
988 | s->s3->in_read_app_data = 2; | |
989 | s->rwstate = SSL_READING; | |
990 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
991 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 992 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
993 | return WORK_MORE_A; |
994 | } | |
fe3a3291 | 995 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
996 | return WORK_FINISHED_STOP; |
997 | #endif | |
61ae935a | 998 | } |
61ae935a MC |
999 | } |
1000 | ||
7cea05dc | 1001 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1002 | { |
2c7b4dbc | 1003 | unsigned char *p; |
ec60ccc1 MC |
1004 | size_t sess_id_len; |
1005 | int i, protverr; | |
2c7b4dbc | 1006 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 1007 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1008 | SSL_COMP *comp; |
1009 | #endif | |
b9908bf9 | 1010 | SSL_SESSION *sess = s->session; |
0f113f3e | 1011 | |
7cea05dc | 1012 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1013 | /* Should not happen */ |
1014 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1015 | return 0; |
2c7b4dbc | 1016 | } |
0f113f3e | 1017 | |
b9908bf9 | 1018 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1019 | protverr = ssl_set_client_hello_version(s); |
1020 | if (protverr != 0) { | |
1021 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1022 | return 0; |
4fa52141 | 1023 | } |
0f113f3e | 1024 | |
a230b26e | 1025 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 1026 | /* |
b9908bf9 MC |
1027 | * In the case of EAP-FAST, we can have a pre-shared |
1028 | * "ticket" without a session ID. | |
0f113f3e | 1029 | */ |
aff8c126 | 1030 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
1031 | (sess->not_resumable)) { |
1032 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1033 | return 0; |
b9908bf9 MC |
1034 | } |
1035 | /* else use the pre-loaded session */ | |
0f113f3e | 1036 | |
b9908bf9 | 1037 | p = s->s3->client_random; |
0f113f3e | 1038 | |
b9908bf9 MC |
1039 | /* |
1040 | * for DTLS if client_random is initialized, reuse it, we are | |
1041 | * required to use same upon reply to HelloVerify | |
1042 | */ | |
1043 | if (SSL_IS_DTLS(s)) { | |
1044 | size_t idx; | |
1045 | i = 1; | |
1046 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1047 | if (p[idx]) { | |
1048 | i = 0; | |
1049 | break; | |
0f113f3e | 1050 | } |
0f113f3e | 1051 | } |
b9908bf9 MC |
1052 | } else |
1053 | i = 1; | |
0f113f3e | 1054 | |
a230b26e | 1055 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1056 | return 0; |
b9908bf9 | 1057 | |
b9908bf9 MC |
1058 | /*- |
1059 | * version indicates the negotiated version: for example from | |
1060 | * an SSLv2/v3 compatible client hello). The client_version | |
1061 | * field is the maximum version we permit and it is also | |
1062 | * used in RSA encrypted premaster secrets. Some servers can | |
1063 | * choke if we initially report a higher version then | |
1064 | * renegotiate to a lower one in the premaster secret. This | |
1065 | * didn't happen with TLS 1.0 as most servers supported it | |
1066 | * but it can with TLS 1.1 or later if the server only supports | |
1067 | * 1.0. | |
1068 | * | |
1069 | * Possible scenario with previous logic: | |
1070 | * 1. Client hello indicates TLS 1.2 | |
1071 | * 2. Server hello says TLS 1.0 | |
1072 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1073 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1074 | * 5. Server sends hello request to renegotiate. |
1075 | * 6. Client hello indicates TLS v1.0 as we now | |
1076 | * know that is maximum server supports. | |
1077 | * 7. Server chokes on RSA encrypted premaster secret | |
1078 | * containing version 1.0. | |
1079 | * | |
1080 | * For interoperability it should be OK to always use the | |
1081 | * maximum version we support in client hello and then rely | |
1082 | * on the checking of version to ensure the servers isn't | |
1083 | * being inconsistent: for example initially negotiating with | |
1084 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1085 | * client_version in client hello and not resetting it to | |
1086 | * the negotiated version. | |
cd998837 MC |
1087 | * |
1088 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1089 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1090 | */ |
7acb8b64 | 1091 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1092 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1093 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1094 | return 0; |
2c7b4dbc | 1095 | } |
b9908bf9 MC |
1096 | |
1097 | /* Session ID */ | |
f05bcf0f | 1098 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1099 | sess_id_len = 0; |
b9908bf9 | 1100 | else |
ec60ccc1 MC |
1101 | sess_id_len = s->session->session_id_length; |
1102 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1103 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1104 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1105 | sess_id_len)) | |
7cea05dc | 1106 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1107 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1108 | return 0; |
b9908bf9 | 1109 | } |
0f113f3e | 1110 | |
b9908bf9 MC |
1111 | /* cookie stuff for DTLS */ |
1112 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1113 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1114 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1115 | s->d1->cookie_len)) { |
b9908bf9 | 1116 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1117 | return 0; |
0f113f3e | 1118 | } |
b9908bf9 MC |
1119 | } |
1120 | ||
1121 | /* Ciphers supported */ | |
7cea05dc | 1122 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1123 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1124 | return 0; |
2c7b4dbc MC |
1125 | } |
1126 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1127 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1128 | return 0; | |
1129 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1130 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1131 | return 0; |
b9908bf9 | 1132 | } |
0f113f3e | 1133 | |
b9908bf9 | 1134 | /* COMPRESSION */ |
7cea05dc | 1135 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1136 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1137 | return 0; |
2c7b4dbc MC |
1138 | } |
1139 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1140 | if (ssl_allow_compression(s) |
1141 | && s->ctx->comp_methods | |
1142 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1143 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1144 | for (i = 0; i < compnum; i++) { | |
1145 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1146 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1147 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1148 | return 0; |
2c7b4dbc MC |
1149 | } |
1150 | } | |
b9908bf9 | 1151 | } |
09b6c2ef | 1152 | #endif |
2c7b4dbc | 1153 | /* Add the NULL method */ |
7cea05dc | 1154 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1155 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1156 | return 0; |
2c7b4dbc | 1157 | } |
761772d7 | 1158 | |
b9908bf9 | 1159 | /* TLS extensions */ |
30aeba43 | 1160 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1161 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1162 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1163 | return 0; |
b9908bf9 | 1164 | } |
0f113f3e | 1165 | |
b9908bf9 | 1166 | return 1; |
0f113f3e | 1167 | } |
d02b48c6 | 1168 | |
be3583fa | 1169 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1170 | { |
1171 | int al; | |
cb150cbc | 1172 | size_t cookie_len; |
8ba708e5 MC |
1173 | PACKET cookiepkt; |
1174 | ||
1175 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1176 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1177 | al = SSL_AD_DECODE_ERROR; |
1178 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1179 | goto f_err; | |
1180 | } | |
1181 | ||
1182 | cookie_len = PACKET_remaining(&cookiepkt); | |
1183 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1184 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1185 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1186 | goto f_err; | |
1187 | } | |
1188 | ||
1189 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1190 | al = SSL_AD_DECODE_ERROR; | |
1191 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1192 | goto f_err; | |
1193 | } | |
1194 | s->d1->cookie_len = cookie_len; | |
1195 | ||
1196 | return MSG_PROCESS_FINISHED_READING; | |
1197 | f_err: | |
1198 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1199 | ossl_statem_set_error(s); |
8ba708e5 MC |
1200 | return MSG_PROCESS_ERROR; |
1201 | } | |
1202 | ||
be3583fa | 1203 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1204 | { |
1205 | STACK_OF(SSL_CIPHER) *sk; | |
1206 | const SSL_CIPHER *c; | |
332eb390 | 1207 | PACKET session_id, extpkt; |
b9908bf9 | 1208 | size_t session_id_len; |
b6981744 | 1209 | const unsigned char *cipherchars; |
b9908bf9 MC |
1210 | int i, al = SSL_AD_INTERNAL_ERROR; |
1211 | unsigned int compression; | |
4fa52141 | 1212 | unsigned int sversion; |
3434f40b | 1213 | unsigned int context; |
4fa52141 | 1214 | int protverr; |
332eb390 | 1215 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1216 | #ifndef OPENSSL_NO_COMP |
1217 | SSL_COMP *comp; | |
1218 | #endif | |
1219 | ||
49e7fe12 MC |
1220 | /* |
1221 | * This is a real handshake so make sure we clean it up at the end. We set | |
1222 | * this here so that we are after any early_data | |
1223 | */ | |
1224 | s->statem.cleanuphand = 1; | |
1225 | ||
4fa52141 VD |
1226 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1227 | al = SSL_AD_DECODE_ERROR; | |
1228 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1229 | goto f_err; | |
1230 | } | |
50932c4a | 1231 | |
4ff65f77 | 1232 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1233 | protverr = ssl_choose_client_version(s, sversion); |
1234 | if (protverr != 0) { | |
1235 | al = SSL_AD_PROTOCOL_VERSION; | |
1236 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1237 | goto f_err; | |
0f113f3e | 1238 | } |
0f113f3e MC |
1239 | |
1240 | /* load the server hello data */ | |
1241 | /* load the server random */ | |
73999b62 | 1242 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1243 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1244 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1245 | goto f_err; |
1246 | } | |
0f113f3e | 1247 | |
fc5ce51d | 1248 | /* Get the session-id. */ |
71728dd8 MC |
1249 | if (!SSL_IS_TLS13(s)) { |
1250 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1251 | al = SSL_AD_DECODE_ERROR; | |
1252 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1253 | goto f_err; | |
1254 | } | |
1255 | session_id_len = PACKET_remaining(&session_id); | |
1256 | if (session_id_len > sizeof s->session->session_id | |
1257 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1258 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1259 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1260 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1261 | goto f_err; | |
1262 | } | |
1263 | } else { | |
625b0d51 | 1264 | PACKET_null_init(&session_id); |
71728dd8 | 1265 | session_id_len = 0; |
0f113f3e | 1266 | } |
e481f9b9 | 1267 | |
73999b62 | 1268 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1269 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1270 | al = SSL_AD_DECODE_ERROR; |
1271 | goto f_err; | |
1272 | } | |
1273 | ||
4ff65f77 MC |
1274 | if (!SSL_IS_TLS13(s)) { |
1275 | if (!PACKET_get_1(pkt, &compression)) { | |
1276 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1277 | al = SSL_AD_DECODE_ERROR; | |
1278 | goto f_err; | |
1279 | } | |
1280 | } else { | |
1281 | compression = 0; | |
1282 | } | |
1283 | ||
1284 | /* TLS extensions */ | |
1285 | if (PACKET_remaining(pkt) == 0) { | |
1286 | PACKET_null_init(&extpkt); | |
1287 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1288 | al = SSL_AD_DECODE_ERROR; | |
1289 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1290 | goto f_err; | |
1291 | } | |
1292 | ||
1293 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1294 | : EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1295 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1296 | goto f_err; |
1297 | ||
1298 | s->hit = 0; | |
1299 | ||
1300 | if (SSL_IS_TLS13(s)) { | |
1301 | /* This will set s->hit if we are resuming */ | |
1302 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1303 | EXT_TLS1_3_SERVER_HELLO, | |
1304 | extensions, NULL, 0, &al)) | |
1305 | goto f_err; | |
1306 | } else { | |
8c1a5343 | 1307 | /* |
4ff65f77 MC |
1308 | * Check if we can resume the session based on external pre-shared |
1309 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1310 | * Resumption based on server-side state works with session IDs. | |
1311 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1312 | * works by overriding the SessionTicket extension at the application | |
1313 | * layer, and does not send a session ID. (We do not know whether | |
1314 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1315 | * ID alone is not a reliable indicator of session resumption, so we | |
1316 | * first check if we can resume, and later peek at the next handshake | |
1317 | * message to see if the server wants to resume. | |
8c1a5343 | 1318 | */ |
4ff65f77 MC |
1319 | if (s->version >= TLS1_VERSION |
1320 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1321 | const SSL_CIPHER *pref_cipher = NULL; | |
1322 | /* | |
1323 | * s->session->master_key_length is a size_t, but this is an int for | |
1324 | * backwards compat reasons | |
1325 | */ | |
1326 | int master_key_length; | |
1327 | master_key_length = sizeof(s->session->master_key); | |
1328 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1329 | &master_key_length, | |
1330 | NULL, &pref_cipher, | |
1331 | s->ext.session_secret_cb_arg) | |
1332 | && master_key_length > 0) { | |
1333 | s->session->master_key_length = master_key_length; | |
1334 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1335 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1336 | } else { |
1337 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1338 | al = SSL_AD_INTERNAL_ERROR; | |
1339 | goto f_err; | |
1340 | } | |
0f113f3e | 1341 | } |
4ff65f77 MC |
1342 | |
1343 | if (session_id_len != 0 | |
1344 | && session_id_len == s->session->session_id_length | |
1345 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1346 | session_id_len) == 0) | |
1347 | s->hit = 1; | |
50932c4a MC |
1348 | } |
1349 | ||
4ff65f77 | 1350 | if (s->hit) { |
0f113f3e | 1351 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1352 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1353 | /* actually a client application bug */ |
1354 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1355 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1356 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1357 | goto f_err; | |
1358 | } | |
6e3d0153 | 1359 | } else { |
0f113f3e | 1360 | /* |
6e3d0153 | 1361 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1362 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1363 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1364 | * so the PAC-based session secret is always preserved. It'll be | |
1365 | * overwritten if the server refuses resumption. | |
0f113f3e | 1366 | */ |
4ff65f77 MC |
1367 | if (s->session->session_id_length > 0 |
1368 | || (SSL_IS_TLS13(s) | |
1369 | && s->session->ext.tick_identity | |
1370 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1371 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1372 | if (!ssl_get_new_session(s, 0)) { |
1373 | goto f_err; | |
1374 | } | |
1375 | } | |
50932c4a | 1376 | |
ccae4a15 | 1377 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1378 | s->session->session_id_length = session_id_len; |
1379 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1380 | if (session_id_len > 0) |
1381 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1382 | session_id_len); | |
0f113f3e | 1383 | } |
fc5ce51d | 1384 | |
ccae4a15 FI |
1385 | /* Session version and negotiated protocol version should match */ |
1386 | if (s->version != s->session->ssl_version) { | |
1387 | al = SSL_AD_PROTOCOL_VERSION; | |
1388 | ||
1389 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1390 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1391 | goto f_err; | |
1392 | } | |
1393 | ||
60d685d1 | 1394 | c = ssl_get_cipher_by_char(s, cipherchars, 0); |
0f113f3e MC |
1395 | if (c == NULL) { |
1396 | /* unknown cipher */ | |
1397 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1398 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1399 | goto f_err; |
1400 | } | |
0f113f3e | 1401 | /* |
3eb2aff4 KR |
1402 | * Now that we know the version, update the check to see if it's an allowed |
1403 | * version. | |
1404 | */ | |
1405 | s->s3->tmp.min_ver = s->version; | |
1406 | s->s3->tmp.max_ver = s->version; | |
1407 | /* | |
1408 | * If it is a disabled cipher we either didn't send it in client hello, | |
1409 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1410 | */ |
1411 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1412 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1413 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1414 | goto f_err; |
1415 | } | |
0f113f3e MC |
1416 | |
1417 | sk = ssl_get_ciphers_by_id(s); | |
1418 | i = sk_SSL_CIPHER_find(sk, c); | |
1419 | if (i < 0) { | |
1420 | /* we did not say we would use this cipher */ | |
1421 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1422 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1423 | goto f_err; |
1424 | } | |
1425 | ||
1426 | /* | |
1427 | * Depending on the session caching (internal/external), the cipher | |
1428 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1429 | * set and use it for comparison. | |
1430 | */ | |
1431 | if (s->session->cipher) | |
1432 | s->session->cipher_id = s->session->cipher->id; | |
1433 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1434 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1435 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1436 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1437 | goto f_err; | |
0f113f3e MC |
1438 | } |
1439 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1440 | |
09b6c2ef | 1441 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1442 | if (compression != 0) { |
0f113f3e | 1443 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1444 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1445 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1446 | goto f_err; | |
1447 | } | |
1448 | /* | |
1449 | * If compression is disabled we'd better not try to resume a session | |
1450 | * using compression. | |
1451 | */ | |
1452 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1453 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1454 | goto f_err; |
1455 | } | |
09b6c2ef | 1456 | #else |
fc5ce51d | 1457 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1458 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1459 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1460 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1461 | goto f_err; | |
1462 | } | |
fc5ce51d | 1463 | if (compression == 0) |
0f113f3e MC |
1464 | comp = NULL; |
1465 | else if (!ssl_allow_compression(s)) { | |
1466 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1467 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1468 | goto f_err; |
fc5ce51d EK |
1469 | } else { |
1470 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1471 | } | |
0f113f3e | 1472 | |
fc5ce51d | 1473 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1474 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1475 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1476 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1477 | goto f_err; | |
1478 | } else { | |
1479 | s->s3->tmp.new_compression = comp; | |
1480 | } | |
09b6c2ef | 1481 | #endif |
761772d7 | 1482 | |
4ff65f77 | 1483 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1484 | goto f_err; |
1485 | ||
8723588e MC |
1486 | #ifndef OPENSSL_NO_SCTP |
1487 | if (SSL_IS_DTLS(s) && s->hit) { | |
1488 | unsigned char sctpauthkey[64]; | |
1489 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1490 | ||
1491 | /* | |
1492 | * Add new shared key for SCTP-Auth, will be ignored if | |
1493 | * no SCTP used. | |
1494 | */ | |
141eb8c6 MC |
1495 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1496 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1497 | |
1498 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1499 | sizeof(sctpauthkey), |
1500 | labelbuffer, | |
1501 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1502 | goto f_err; |
8723588e MC |
1503 | |
1504 | BIO_ctrl(SSL_get_wbio(s), | |
1505 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1506 | sizeof(sctpauthkey), sctpauthkey); | |
1507 | } | |
1508 | #endif | |
1509 | ||
92760c21 MC |
1510 | /* |
1511 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1512 | * we're done with this message | |
1513 | */ | |
1514 | if (SSL_IS_TLS13(s) | |
1515 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1516 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1517 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1518 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1519 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1520 | al = SSL_AD_INTERNAL_ERROR; | |
1521 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1522 | goto f_err; | |
1523 | } | |
1524 | ||
1b0286a3 | 1525 | OPENSSL_free(extensions); |
b9908bf9 | 1526 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1527 | f_err: |
1528 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1529 | ossl_statem_set_error(s); |
1b0286a3 | 1530 | OPENSSL_free(extensions); |
b9908bf9 | 1531 | return MSG_PROCESS_ERROR; |
0f113f3e | 1532 | } |
d02b48c6 | 1533 | |
3847d426 MC |
1534 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1535 | { | |
1536 | unsigned int sversion; | |
2248dbeb | 1537 | int errorcode; |
3847d426 MC |
1538 | RAW_EXTENSION *extensions = NULL; |
1539 | int al; | |
1540 | PACKET extpkt; | |
1541 | ||
1542 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1543 | al = SSL_AD_DECODE_ERROR; | |
1544 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1545 | goto f_err; | |
1546 | } | |
1547 | ||
1548 | s->hello_retry_request = 1; | |
1549 | ||
1550 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1551 | errorcode = ssl_choose_client_version(s, sversion); |
1552 | if (errorcode != 0) { | |
3847d426 | 1553 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1554 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1555 | goto f_err; |
1556 | } | |
1557 | ||
1558 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1559 | al = SSL_AD_DECODE_ERROR; | |
1560 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1561 | goto f_err; | |
1562 | } | |
1563 | ||
1564 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
fc5ece2e | 1565 | &extensions, &al, NULL) |
3847d426 MC |
1566 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, |
1567 | extensions, NULL, 0, &al)) | |
1568 | goto f_err; | |
1569 | ||
1570 | OPENSSL_free(extensions); | |
1571 | ||
1572 | return MSG_PROCESS_FINISHED_READING; | |
1573 | f_err: | |
1574 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1575 | ossl_statem_set_error(s); | |
1576 | OPENSSL_free(extensions); | |
1577 | return MSG_PROCESS_ERROR; | |
1578 | } | |
1579 | ||
be3583fa | 1580 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1581 | { |
1582 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1583 | unsigned long cert_list_len, cert_len; | |
1584 | X509 *x = NULL; | |
b6981744 | 1585 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1586 | STACK_OF(X509) *sk = NULL; |
1587 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1588 | size_t chainidx; |
e96e0f8e | 1589 | unsigned int context = 0; |
0f113f3e MC |
1590 | |
1591 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1592 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1593 | goto err; |
0f113f3e MC |
1594 | } |
1595 | ||
e96e0f8e MC |
1596 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1597 | || context != 0 | |
1598 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1599 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1600 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1601 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1602 | goto f_err; |
1603 | } | |
d805a57b | 1604 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1605 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1606 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1607 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1608 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1609 | SSL_R_CERT_LENGTH_MISMATCH); |
1610 | goto f_err; | |
1611 | } | |
1612 | ||
df758a85 MC |
1613 | certstart = certbytes; |
1614 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1615 | if (x == NULL) { |
1616 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1617 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1618 | goto f_err; |
1619 | } | |
df758a85 | 1620 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1621 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1622 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1623 | SSL_R_CERT_LENGTH_MISMATCH); |
1624 | goto f_err; | |
1625 | } | |
e96e0f8e MC |
1626 | |
1627 | if (SSL_IS_TLS13(s)) { | |
1628 | RAW_EXTENSION *rawexts = NULL; | |
1629 | PACKET extensions; | |
1630 | ||
1631 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1632 | al = SSL_AD_DECODE_ERROR; | |
1633 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1634 | goto f_err; | |
1635 | } | |
1636 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
fc5ece2e | 1637 | &rawexts, &al, NULL) |
e96e0f8e | 1638 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, |
5ee289ea MC |
1639 | rawexts, x, chainidx, &al)) { |
1640 | OPENSSL_free(rawexts); | |
e96e0f8e | 1641 | goto f_err; |
5ee289ea MC |
1642 | } |
1643 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1644 | } |
1645 | ||
0f113f3e | 1646 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1647 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1648 | goto err; |
0f113f3e MC |
1649 | } |
1650 | x = NULL; | |
0f113f3e MC |
1651 | } |
1652 | ||
1653 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1654 | /* |
1655 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1656 | * for client side verification of the server certificate to take place. | |
1657 | * However, historically the code has only checked that *any* flag is set | |
1658 | * to cause server verification to take place. Use of the other flags makes | |
1659 | * no sense in client mode. An attempt to clean up the semantics was | |
1660 | * reverted because at least one application *only* set | |
1661 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1662 | * server verification to take place, after the clean up it silently did | |
1663 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1664 | * sent to them because they are void functions. Therefore, we now use the | |
1665 | * (less clean) historic behaviour of performing validation if any flag is | |
1666 | * set. The *documented* interface remains the same. | |
1667 | */ | |
1668 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1669 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1670 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1671 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1672 | goto f_err; | |
1673 | } | |
1674 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1675 | if (i > 1) { | |
b9908bf9 | 1676 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1677 | al = SSL_AD_HANDSHAKE_FAILURE; |
1678 | goto f_err; | |
1679 | } | |
1680 | ||
c34b0f99 | 1681 | s->session->peer_chain = sk; |
0f113f3e MC |
1682 | /* |
1683 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1684 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1685 | */ |
1686 | x = sk_X509_value(sk, 0); | |
1687 | sk = NULL; | |
1688 | /* | |
1689 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1690 | */ | |
1691 | ||
8382fd3a | 1692 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1693 | |
55a9a16f | 1694 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1695 | x = NULL; |
1696 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1697 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1698 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1699 | goto f_err; | |
1700 | } | |
1701 | ||
1702 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1703 | if (i < 0) { |
0f113f3e MC |
1704 | x = NULL; |
1705 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1706 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1707 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1708 | goto f_err; | |
1709 | } | |
05b8486e DSH |
1710 | /* |
1711 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1712 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1713 | * type. | |
1714 | */ | |
1715 | if (!SSL_IS_TLS13(s)) { | |
1716 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1717 | if (exp_idx >= 0 && i != exp_idx | |
1718 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1719 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1720 | && i != SSL_PKEY_GOST01))) { | |
1721 | x = NULL; | |
1722 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1723 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1724 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1725 | goto f_err; | |
1726 | } | |
0f113f3e | 1727 | } |
a273c6ee | 1728 | s->session->peer_type = i; |
55a9a16f MC |
1729 | |
1730 | X509_free(s->session->peer); | |
05f0fb9f | 1731 | X509_up_ref(x); |
55a9a16f | 1732 | s->session->peer = x; |
0f113f3e | 1733 | s->session->verify_result = s->verify_result; |
0f113f3e | 1734 | x = NULL; |
2c5dfdc3 MC |
1735 | |
1736 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1737 | if (SSL_IS_TLS13(s) | |
1738 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1739 | sizeof(s->cert_verify_hash), | |
1740 | &s->cert_verify_hash_len)) { | |
1741 | al = SSL_AD_INTERNAL_ERROR; | |
1742 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1743 | goto f_err; | |
1744 | } | |
1745 | ||
b9908bf9 | 1746 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1747 | goto done; |
1748 | ||
0f113f3e | 1749 | f_err: |
66696478 | 1750 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1751 | err: |
fe3a3291 | 1752 | ossl_statem_set_error(s); |
66696478 | 1753 | done: |
0f113f3e MC |
1754 | X509_free(x); |
1755 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1756 | return ret; |
0f113f3e | 1757 | } |
d02b48c6 | 1758 | |
7dc1c647 | 1759 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1760 | { |
1761 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1762 | PACKET psk_identity_hint; |
02a74590 | 1763 | |
7dc1c647 MC |
1764 | /* PSK ciphersuites are preceded by an identity hint */ |
1765 | ||
1766 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1767 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1768 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1769 | return 0; |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Store PSK identity hint for later use, hint is used in | |
1774 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1775 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1776 | * identity. | |
1777 | */ | |
1778 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1779 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1780 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1781 | return 0; |
1782 | } | |
02a74590 | 1783 | |
7dc1c647 MC |
1784 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1785 | OPENSSL_free(s->session->psk_identity_hint); | |
1786 | s->session->psk_identity_hint = NULL; | |
1787 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1788 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1789 | *al = SSL_AD_INTERNAL_ERROR; |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | return 1; | |
1794 | #else | |
4fa88861 | 1795 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1796 | *al = SSL_AD_INTERNAL_ERROR; |
1797 | return 0; | |
02a74590 MC |
1798 | #endif |
1799 | } | |
1800 | ||
25c6c10c MC |
1801 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1802 | { | |
1803 | #ifndef OPENSSL_NO_SRP | |
1804 | PACKET prime, generator, salt, server_pub; | |
1805 | ||
1806 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1807 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1808 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1809 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1810 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1811 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1812 | return 0; |
1813 | } | |
1814 | ||
348240c6 | 1815 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1816 | if ((s->srp_ctx.N = |
1817 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1818 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1819 | || (s->srp_ctx.g = |
1820 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1821 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1822 | || (s->srp_ctx.s = |
1823 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1824 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1825 | || (s->srp_ctx.B = |
1826 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1827 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1828 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1829 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1830 | return 0; |
1831 | } | |
1832 | ||
1833 | if (!srp_verify_server_param(s, al)) { | |
1834 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1835 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1836 | return 0; |
1837 | } | |
1838 | ||
1839 | /* We must check if there is a certificate */ | |
a230b26e | 1840 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1841 | *pkey = X509_get0_pubkey(s->session->peer); |
1842 | ||
1843 | return 1; | |
1844 | #else | |
4fa88861 | 1845 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1846 | *al = SSL_AD_INTERNAL_ERROR; |
1847 | return 0; | |
1848 | #endif | |
1849 | } | |
1850 | ||
e01a610d MC |
1851 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1852 | { | |
1853 | #ifndef OPENSSL_NO_DH | |
1854 | PACKET prime, generator, pub_key; | |
1855 | EVP_PKEY *peer_tmp = NULL; | |
1856 | ||
1857 | DH *dh = NULL; | |
1858 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1859 | ||
26505153 RL |
1860 | int check_bits = 0; |
1861 | ||
e01a610d MC |
1862 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1863 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1864 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1865 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1866 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1867 | return 0; |
1868 | } | |
1869 | ||
1870 | peer_tmp = EVP_PKEY_new(); | |
1871 | dh = DH_new(); | |
1872 | ||
1873 | if (peer_tmp == NULL || dh == NULL) { | |
1874 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1875 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1876 | goto err; |
1877 | } | |
1878 | ||
348240c6 MC |
1879 | /* TODO(size_t): Convert these calls */ |
1880 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1881 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1882 | NULL); | |
1883 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1884 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1885 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1886 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1887 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1888 | goto err; |
1889 | } | |
1890 | ||
26505153 RL |
1891 | /* test non-zero pupkey */ |
1892 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1893 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1894 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1895 | goto err; |
1896 | } | |
1897 | ||
1898 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1899 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1900 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1901 | goto err; |
1902 | } | |
1903 | p = g = NULL; | |
1904 | ||
26505153 RL |
1905 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1906 | *al = SSL_AD_DECODE_ERROR; | |
1907 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1908 | goto err; | |
1909 | } | |
1910 | ||
e01a610d MC |
1911 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1912 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1913 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1914 | goto err; |
1915 | } | |
1916 | bnpub_key = NULL; | |
1917 | ||
1918 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1919 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1920 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1921 | goto err; |
1922 | } | |
1923 | ||
1924 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1925 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1926 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1927 | goto err; |
1928 | } | |
1929 | ||
1930 | s->s3->peer_tmp = peer_tmp; | |
1931 | ||
1932 | /* | |
1933 | * FIXME: This makes assumptions about which ciphersuites come with | |
1934 | * public keys. We should have a less ad-hoc way of doing this | |
1935 | */ | |
a230b26e | 1936 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1937 | *pkey = X509_get0_pubkey(s->session->peer); |
1938 | /* else anonymous DH, so no certificate or pkey. */ | |
1939 | ||
1940 | return 1; | |
1941 | ||
1942 | err: | |
1943 | BN_free(p); | |
1944 | BN_free(g); | |
1945 | BN_free(bnpub_key); | |
1946 | DH_free(dh); | |
1947 | EVP_PKEY_free(peer_tmp); | |
1948 | ||
1949 | return 0; | |
1950 | #else | |
4fa88861 | 1951 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1952 | *al = SSL_AD_INTERNAL_ERROR; |
1953 | return 0; | |
1954 | #endif | |
1955 | } | |
1956 | ||
ff74aeb1 MC |
1957 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1958 | { | |
1959 | #ifndef OPENSSL_NO_EC | |
1960 | PACKET encoded_pt; | |
1961 | const unsigned char *ecparams; | |
1962 | int curve_nid; | |
ec24630a | 1963 | unsigned int curve_flags; |
ff74aeb1 MC |
1964 | EVP_PKEY_CTX *pctx = NULL; |
1965 | ||
1966 | /* | |
1967 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1968 | * public key. For now we only support named (not generic) curves and | |
1969 | * ECParameters in this case is just three bytes. | |
1970 | */ | |
1971 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1972 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1973 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1974 | return 0; |
1975 | } | |
1976 | /* | |
1977 | * Check curve is one of our preferences, if not server has sent an | |
1978 | * invalid curve. ECParameters is 3 bytes. | |
1979 | */ | |
1980 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1981 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1982 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1983 | return 0; |
1984 | } | |
1985 | ||
ec24630a DSH |
1986 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1987 | ||
a230b26e | 1988 | if (curve_nid == 0) { |
ff74aeb1 | 1989 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1990 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1991 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1992 | return 0; | |
1993 | } | |
1994 | ||
ec24630a DSH |
1995 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1996 | EVP_PKEY *key = EVP_PKEY_new(); | |
1997 | ||
1998 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1999 | *al = SSL_AD_INTERNAL_ERROR; | |
2000 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2001 | EVP_PKEY_free(key); | |
2002 | return 0; | |
2003 | } | |
2004 | s->s3->peer_tmp = key; | |
2005 | } else { | |
2006 | /* Set up EVP_PKEY with named curve as parameters */ | |
2007 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
2008 | if (pctx == NULL | |
2009 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2010 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2011 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2012 | *al = SSL_AD_INTERNAL_ERROR; | |
2013 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2014 | EVP_PKEY_CTX_free(pctx); | |
2015 | return 0; | |
2016 | } | |
ff74aeb1 | 2017 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2018 | pctx = NULL; |
ff74aeb1 | 2019 | } |
ff74aeb1 MC |
2020 | |
2021 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2022 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2023 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2024 | return 0; |
2025 | } | |
2026 | ||
ec24630a DSH |
2027 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2028 | PACKET_data(&encoded_pt), | |
2029 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 2030 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 2031 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2032 | return 0; |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2037 | * ECParameters in the server key exchange message. We do support RSA | |
2038 | * and ECDSA. | |
2039 | */ | |
2040 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2041 | *pkey = X509_get0_pubkey(s->session->peer); | |
2042 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2043 | *pkey = X509_get0_pubkey(s->session->peer); | |
2044 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2045 | ||
2046 | return 1; | |
2047 | #else | |
4fa88861 | 2048 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2049 | *al = SSL_AD_INTERNAL_ERROR; |
2050 | return 0; | |
2051 | #endif | |
2052 | } | |
2053 | ||
be3583fa | 2054 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2055 | { |
5554facb | 2056 | int al = -1; |
e1e588ac | 2057 | long alg_k; |
b9908bf9 | 2058 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2059 | EVP_MD_CTX *md_ctx = NULL; |
2060 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2061 | PACKET save_param_start, signature; |
b9908bf9 | 2062 | |
b9908bf9 MC |
2063 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2064 | ||
73999b62 | 2065 | save_param_start = *pkt; |
8d92c1f8 | 2066 | |
3260adf1 | 2067 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2068 | EVP_PKEY_free(s->s3->peer_tmp); |
2069 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2070 | #endif |
d02b48c6 | 2071 | |
7689082b | 2072 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2073 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2074 | goto err; | |
7689082b DSH |
2075 | } |
2076 | ||
2077 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2078 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2079 | } else if (alg_k & SSL_kSRP) { |
2080 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2081 | goto err; |
e01a610d MC |
2082 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2083 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2084 | goto err; | |
ff74aeb1 MC |
2085 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2086 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2087 | goto err; | |
0f113f3e MC |
2088 | } else if (alg_k) { |
2089 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2090 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2091 | goto err; |
0f113f3e | 2092 | } |
0f113f3e | 2093 | |
0f113f3e MC |
2094 | /* if it was signed, check the signature */ |
2095 | if (pkey != NULL) { | |
32942870 | 2096 | PACKET params; |
be8dba2c MC |
2097 | int maxsig; |
2098 | const EVP_MD *md = NULL; | |
e1e588ac | 2099 | |
32942870 EK |
2100 | /* |
2101 | * |pkt| now points to the beginning of the signature, so the difference | |
2102 | * equals the length of the parameters. | |
2103 | */ | |
2104 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2105 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2106 | PACKET_remaining(pkt))) { |
32942870 | 2107 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2108 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2109 | goto err; |
32942870 EK |
2110 | } |
2111 | ||
0f113f3e | 2112 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2113 | unsigned int sigalg; |
0f113f3e | 2114 | int rv; |
703bcee0 MC |
2115 | |
2116 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2117 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2118 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2119 | goto err; |
0f113f3e | 2120 | } |
5554facb | 2121 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2122 | if (rv == -1) { |
2123 | al = SSL_AD_INTERNAL_ERROR; | |
2124 | goto err; | |
2125 | } else if (rv == 0) { | |
2126 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2127 | goto err; |
0f113f3e | 2128 | } |
a2f9200f | 2129 | #ifdef SSL_DEBUG |
0f113f3e MC |
2130 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2131 | #endif | |
f365a3e2 DSH |
2132 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2133 | al = SSL_AD_INTERNAL_ERROR; | |
2134 | goto err; | |
32942870 | 2135 | } |
0f113f3e | 2136 | |
f365a3e2 DSH |
2137 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2138 | ||
73999b62 MC |
2139 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2140 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2141 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2142 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2143 | goto err; |
0f113f3e | 2144 | } |
be8dba2c MC |
2145 | maxsig = EVP_PKEY_size(pkey); |
2146 | if (maxsig < 0) { | |
e1e588ac | 2147 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2148 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2149 | goto err; |
8098fc56 | 2150 | } |
0f113f3e MC |
2151 | |
2152 | /* | |
8098fc56 | 2153 | * Check signature length |
0f113f3e | 2154 | */ |
be8dba2c | 2155 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2156 | /* wrong packet length */ |
e1e588ac | 2157 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2158 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2159 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2160 | goto err; |
2161 | } | |
2162 | ||
2163 | md_ctx = EVP_MD_CTX_new(); | |
2164 | if (md_ctx == NULL) { | |
2165 | al = SSL_AD_INTERNAL_ERROR; | |
2166 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2167 | goto err; | |
0f113f3e | 2168 | } |
e1e588ac | 2169 | |
fe3066ee MC |
2170 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2171 | al = SSL_AD_INTERNAL_ERROR; | |
2172 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2173 | goto err; | |
2174 | } | |
5554facb | 2175 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2176 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2177 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2178 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2179 | al = SSL_AD_INTERNAL_ERROR; |
2180 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2181 | goto err; | |
2182 | } | |
2183 | } | |
2184 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2185 | SSL3_RANDOM_SIZE) <= 0 | |
2186 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2187 | SSL3_RANDOM_SIZE) <= 0 | |
2188 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2189 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2190 | al = SSL_AD_INTERNAL_ERROR; |
2191 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2192 | goto err; |
192e4bbb | 2193 | } |
fe3066ee MC |
2194 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2195 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2196 | /* bad signature */ |
2197 | al = SSL_AD_DECRYPT_ERROR; | |
2198 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2199 | goto err; |
0f113f3e | 2200 | } |
e1e588ac | 2201 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2202 | md_ctx = NULL; |
0f113f3e | 2203 | } else { |
7689082b | 2204 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2205 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2206 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2207 | /* Might be wrong key type, check it */ |
e1e588ac | 2208 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2209 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2210 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2211 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2212 | } else { |
2213 | al = SSL_AD_DECODE_ERROR; | |
2214 | } | |
0f113f3e MC |
2215 | goto err; |
2216 | } | |
2217 | /* still data left over */ | |
73999b62 | 2218 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2219 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2220 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2221 | goto err; |
0f113f3e MC |
2222 | } |
2223 | } | |
e1e588ac | 2224 | |
b9908bf9 | 2225 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2226 | err: |
7dc1c647 MC |
2227 | if (al != -1) |
2228 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2229 | ossl_statem_set_error(s); |
fe3066ee | 2230 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2231 | return MSG_PROCESS_ERROR; |
0f113f3e | 2232 | } |
d02b48c6 | 2233 | |
be3583fa | 2234 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2235 | { |
2236 | int ret = MSG_PROCESS_ERROR; | |
03f44b97 | 2237 | unsigned int i, name_len; |
b9908bf9 | 2238 | X509_NAME *xn = NULL; |
b6981744 | 2239 | const unsigned char *namestart, *namebytes; |
b9908bf9 | 2240 | STACK_OF(X509_NAME) *ca_sk = NULL; |
03f44b97 | 2241 | PACKET cadns; |
0f113f3e MC |
2242 | |
2243 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2244 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2245 | goto err; |
2246 | } | |
2247 | ||
03f44b97 DSH |
2248 | if (SSL_IS_TLS13(s)) { |
2249 | PACKET reqctx; | |
2250 | ||
2251 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2252 | OPENSSL_free(s->s3->tmp.ctype); | |
2253 | s->s3->tmp.ctype = NULL; | |
2254 | s->s3->tmp.ctype_len = 0; | |
2255 | /* TODO(TLS1.3) need to process request context, for now ignore */ | |
2256 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2257 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2258 | SSL_R_LENGTH_MISMATCH); | |
2259 | goto err; | |
2260 | } | |
2261 | } else { | |
2262 | PACKET ctypes; | |
75c13e78 | 2263 | |
03f44b97 DSH |
2264 | /* get the certificate types */ |
2265 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
2266 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2267 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2268 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2269 | goto err; |
03f44b97 DSH |
2270 | } |
2271 | ||
2272 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
2273 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); | |
2274 | goto err; | |
2275 | } | |
0f113f3e | 2276 | } |
ac112332 | 2277 | |
0f113f3e | 2278 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2279 | PACKET sigalgs; |
2280 | ||
2281 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2282 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2283 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2284 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2285 | goto err; |
2286 | } | |
ac112332 | 2287 | |
9195ddcd DSH |
2288 | /* Clear certificate validity flags */ |
2289 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 2290 | s->s3->tmp.valid_flags[i] = 0; |
703bcee0 | 2291 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2292 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2293 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2294 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2295 | goto err; | |
2296 | } | |
2297 | if (!tls1_process_sigalgs(s)) { | |
2298 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2299 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2300 | goto err; |
2301 | } | |
0f113f3e MC |
2302 | } |
2303 | ||
2304 | /* get the CA RDNs */ | |
03f44b97 | 2305 | if (!PACKET_get_length_prefixed_2(pkt, &cadns)) { |
0f113f3e | 2306 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2307 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2308 | goto err; |
2309 | } | |
2310 | ||
03f44b97 DSH |
2311 | while (PACKET_remaining(&cadns)) { |
2312 | if (!PACKET_get_net_2(&cadns, &name_len) | |
2313 | || !PACKET_get_bytes(&cadns, &namebytes, name_len)) { | |
0f113f3e | 2314 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2315 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2316 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2317 | goto err; |
2318 | } | |
2319 | ||
ac112332 | 2320 | namestart = namebytes; |
0f113f3e | 2321 | |
ac112332 MC |
2322 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2323 | name_len)) == NULL) { | |
3c33c6f6 | 2324 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2325 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2326 | goto err; |
0f113f3e MC |
2327 | } |
2328 | ||
ac112332 | 2329 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2330 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2331 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2332 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2333 | goto err; | |
2334 | } | |
2335 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2336 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2337 | goto err; |
2338 | } | |
6afef8b1 | 2339 | xn = NULL; |
0f113f3e | 2340 | } |
03f44b97 DSH |
2341 | /* TODO(TLS1.3) need to parse and process extensions, for now ignore */ |
2342 | if (SSL_IS_TLS13(s)) { | |
2343 | PACKET reqexts; | |
2344 | ||
2345 | if (!PACKET_get_length_prefixed_2(pkt, &reqexts)) { | |
2346 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2347 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2348 | SSL_R_EXT_LENGTH_MISMATCH); | |
2349 | goto err; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | if (PACKET_remaining(pkt) != 0) { | |
2354 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2355 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2356 | goto err; | |
2357 | } | |
0f113f3e | 2358 | |
0f113f3e MC |
2359 | /* we should setup a certificate to return.... */ |
2360 | s->s3->tmp.cert_req = 1; | |
222561fe | 2361 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2362 | s->s3->tmp.ca_names = ca_sk; |
2363 | ca_sk = NULL; | |
2364 | ||
05c4f1d5 | 2365 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2366 | goto done; |
0f113f3e | 2367 | err: |
fe3a3291 | 2368 | ossl_statem_set_error(s); |
cc273a93 | 2369 | done: |
6afef8b1 | 2370 | X509_NAME_free(xn); |
222561fe | 2371 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2372 | return ret; |
0f113f3e MC |
2373 | } |
2374 | ||
2375 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2376 | { |
0f113f3e | 2377 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2378 | } |
dfeab068 | 2379 | |
be3583fa | 2380 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2381 | { |
6df55cac | 2382 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2383 | unsigned int ticklen; |
9ac6244b | 2384 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2385 | unsigned int sess_len; |
de1df7e9 | 2386 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2387 | |
73999b62 | 2388 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2389 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2390 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2391 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2392 | || (SSL_IS_TLS13(s) |
2393 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2394 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2395 | goto f_err; |
2396 | } | |
2397 | ||
de1df7e9 MC |
2398 | /* |
2399 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2400 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2401 | * be 0 here in that instance | |
2402 | */ | |
e711da71 | 2403 | if (ticklen == 0) |
c9de4a20 | 2404 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2405 | |
de1df7e9 | 2406 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2407 | if (s->session->session_id_length > 0) { |
2408 | int i = s->session_ctx->session_cache_mode; | |
2409 | SSL_SESSION *new_sess; | |
2410 | /* | |
2411 | * We reused an existing session, so we need to replace it with a new | |
2412 | * one | |
2413 | */ | |
2414 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2415 | /* | |
e4612d02 | 2416 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2417 | */ |
e4612d02 | 2418 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2419 | } |
2420 | ||
2421 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2422 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2423 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2424 | goto f_err; |
2425 | } | |
2426 | ||
2427 | SSL_SESSION_free(s->session); | |
2428 | s->session = new_sess; | |
2429 | } | |
2430 | ||
fc24f0bf MC |
2431 | /* |
2432 | * Technically the cast to long here is not guaranteed by the C standard - | |
2433 | * but we use it elsewhere, so this should be ok. | |
2434 | */ | |
2435 | s->session->time = (long)time(NULL); | |
2436 | ||
aff8c126 RS |
2437 | OPENSSL_free(s->session->ext.tick); |
2438 | s->session->ext.tick = NULL; | |
2439 | s->session->ext.ticklen = 0; | |
e711da71 | 2440 | |
aff8c126 RS |
2441 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2442 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2443 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2444 | goto err; |
2445 | } | |
aff8c126 | 2446 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2447 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2448 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2449 | goto f_err; |
2450 | } | |
e711da71 | 2451 | |
aff8c126 | 2452 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2453 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2454 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2455 | |
2456 | if (SSL_IS_TLS13(s)) { | |
2457 | PACKET extpkt; | |
2458 | ||
2459 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2460 | || !tls_collect_extensions(s, &extpkt, | |
2461 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
fc5ece2e | 2462 | &exts, &al, NULL) |
de1df7e9 MC |
2463 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, |
2464 | exts, NULL, 0, &al)) { | |
2465 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2466 | goto f_err; | |
2467 | } | |
2468 | } | |
2469 | ||
0f113f3e MC |
2470 | /* |
2471 | * There are two ways to detect a resumed ticket session. One is to set | |
2472 | * an appropriate session ID and then the server must return a match in | |
2473 | * ServerHello. This allows the normal client session ID matching to work | |
2474 | * and we know much earlier that the ticket has been accepted. The | |
2475 | * other way is to set zero length session ID when the ticket is | |
2476 | * presented and rely on the handshake to determine session resumption. | |
2477 | * We choose the former approach because this fits in with assumptions | |
2478 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2479 | * SHA256 is disabled) hash of the ticket. | |
2480 | */ | |
ec60ccc1 MC |
2481 | /* |
2482 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2483 | * but s->session->session_id_length is a size_t | |
2484 | */ | |
aff8c126 | 2485 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2486 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2487 | EVP_sha256(), NULL)) { |
2488 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2489 | goto err; | |
2490 | } | |
ec60ccc1 | 2491 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2492 | |
2493 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2494 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2495 | OPENSSL_free(exts); |
de1df7e9 MC |
2496 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2497 | return MSG_PROCESS_FINISHED_READING; | |
2498 | } | |
2499 | ||
b9908bf9 | 2500 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2501 | f_err: |
2502 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2503 | err: | |
fe3a3291 | 2504 | ossl_statem_set_error(s); |
33d93417 | 2505 | OPENSSL_free(exts); |
b9908bf9 | 2506 | return MSG_PROCESS_ERROR; |
0f113f3e | 2507 | } |
67c8e7f4 | 2508 | |
f63e4288 MC |
2509 | /* |
2510 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2511 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2512 | * |*al| is populated with a suitable alert code. | |
2513 | */ | |
2514 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2515 | { |
8b0e934a | 2516 | size_t resplen; |
b9908bf9 | 2517 | unsigned int type; |
b9908bf9 | 2518 | |
73999b62 | 2519 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2520 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2521 | *al = SSL_AD_DECODE_ERROR; |
2522 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2523 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2524 | return 0; | |
0f113f3e | 2525 | } |
56a26ce3 MC |
2526 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2527 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2528 | *al = SSL_AD_DECODE_ERROR; |
2529 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2530 | return 0; | |
0f113f3e | 2531 | } |
8cbfcc70 RS |
2532 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2533 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2534 | *al = SSL_AD_INTERNAL_ERROR; |
2535 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2536 | return 0; | |
0f113f3e | 2537 | } |
8cbfcc70 | 2538 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2539 | *al = SSL_AD_DECODE_ERROR; |
2540 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2541 | return 0; | |
ac63710a | 2542 | } |
8cbfcc70 | 2543 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2544 | |
2545 | return 1; | |
2546 | } | |
2faa1b48 | 2547 | |
f63e4288 MC |
2548 | |
2549 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2550 | { | |
2551 | int al; | |
2552 | ||
2553 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2554 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2555 | ossl_statem_set_error(s); | |
2556 | return MSG_PROCESS_ERROR; | |
2557 | } | |
2558 | ||
b9908bf9 | 2559 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2560 | } |
d02b48c6 | 2561 | |
7776a36c MC |
2562 | /* |
2563 | * Perform miscellaneous checks and processing after we have received the | |
2564 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2565 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2566 | * on failure. | |
7776a36c MC |
2567 | */ |
2568 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2569 | { |
a455d0f6 MC |
2570 | /* |
2571 | * at this point we check that we have the required stuff from | |
2572 | * the server | |
2573 | */ | |
2574 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2575 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2576 | return 0; | |
a455d0f6 MC |
2577 | } |
2578 | ||
bb1aaab4 | 2579 | /* |
aff8c126 RS |
2580 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2581 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2582 | * message, or NULL and -1 otherwise |
2583 | */ | |
aff8c126 RS |
2584 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2585 | && s->ctx->ext.status_cb != NULL) { | |
2586 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2587 | ||
bb1aaab4 | 2588 | if (ret == 0) { |
7776a36c MC |
2589 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2590 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2591 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2592 | return 0; |
bb1aaab4 MC |
2593 | } |
2594 | if (ret < 0) { | |
7776a36c MC |
2595 | *al = SSL_AD_INTERNAL_ERROR; |
2596 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2597 | ERR_R_MALLOC_FAILURE); | |
2598 | return 0; | |
bb1aaab4 MC |
2599 | } |
2600 | } | |
ed29e82a RP |
2601 | #ifndef OPENSSL_NO_CT |
2602 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2603 | /* Note we validate the SCTs whether or not we abort on error */ |
2604 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2605 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2606 | return 0; | |
ed29e82a RP |
2607 | } |
2608 | } | |
2609 | #endif | |
2610 | ||
7776a36c MC |
2611 | return 1; |
2612 | } | |
2613 | ||
2614 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2615 | { | |
2616 | int al = SSL_AD_INTERNAL_ERROR; | |
2617 | ||
2618 | if (PACKET_remaining(pkt) > 0) { | |
2619 | /* should contain no data */ | |
2620 | al = SSL_AD_DECODE_ERROR; | |
2621 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2622 | goto err; | |
2623 | } | |
2624 | #ifndef OPENSSL_NO_SRP | |
2625 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2626 | if (SRP_Calc_A_param(s) <= 0) { | |
2627 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2628 | goto err; | |
2629 | } | |
2630 | } | |
2631 | #endif | |
2632 | ||
2633 | /* | |
2634 | * Error queue messages are generated directly by this function | |
2635 | */ | |
2636 | if (!tls_process_initial_server_flight(s, &al)) | |
2637 | goto err; | |
2638 | ||
473483d4 MC |
2639 | #ifndef OPENSSL_NO_SCTP |
2640 | /* Only applies to renegotiation */ | |
2641 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2642 | && s->renegotiate != 0) |
473483d4 MC |
2643 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2644 | else | |
2645 | #endif | |
2646 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2647 | |
2648 | err: | |
2649 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2650 | ossl_statem_set_error(s); | |
2651 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2652 | } |
176f31dd | 2653 | |
f1ec23c0 | 2654 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2655 | { |
7689082b | 2656 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2657 | int ret = 0; |
2658 | /* | |
2659 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2660 | * \0-terminated identity. The last byte is for us for simulating | |
2661 | * strnlen. | |
2662 | */ | |
2663 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2664 | size_t identitylen = 0; | |
2665 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2666 | unsigned char *tmppsk = NULL; | |
2667 | char *tmpidentity = NULL; | |
2668 | size_t psklen = 0; | |
2669 | ||
2670 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2671 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2672 | *al = SSL_AD_INTERNAL_ERROR; |
2673 | goto err; | |
2674 | } | |
d02b48c6 | 2675 | |
13c0ec4a | 2676 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2677 | |
13c0ec4a MC |
2678 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2679 | identity, sizeof(identity) - 1, | |
2680 | psk, sizeof(psk)); | |
7689082b | 2681 | |
13c0ec4a | 2682 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2683 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2684 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2685 | goto err; | |
2686 | } else if (psklen == 0) { | |
05ec6a25 | 2687 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2688 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2689 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2690 | goto err; | |
2691 | } | |
7689082b | 2692 | |
13c0ec4a MC |
2693 | identitylen = strlen(identity); |
2694 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2695 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2696 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2697 | goto err; | |
2698 | } | |
7689082b | 2699 | |
13c0ec4a MC |
2700 | tmppsk = OPENSSL_memdup(psk, psklen); |
2701 | tmpidentity = OPENSSL_strdup(identity); | |
2702 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2703 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2704 | *al = SSL_AD_INTERNAL_ERROR; |
2705 | goto err; | |
2706 | } | |
7689082b | 2707 | |
13c0ec4a MC |
2708 | OPENSSL_free(s->s3->tmp.psk); |
2709 | s->s3->tmp.psk = tmppsk; | |
2710 | s->s3->tmp.psklen = psklen; | |
2711 | tmppsk = NULL; | |
2712 | OPENSSL_free(s->session->psk_identity); | |
2713 | s->session->psk_identity = tmpidentity; | |
2714 | tmpidentity = NULL; | |
f1ec23c0 | 2715 | |
b2b3024e | 2716 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2717 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2718 | *al = SSL_AD_INTERNAL_ERROR; | |
2719 | goto err; | |
2720 | } | |
7689082b | 2721 | |
13c0ec4a | 2722 | ret = 1; |
0bce0b02 | 2723 | |
13c0ec4a MC |
2724 | err: |
2725 | OPENSSL_cleanse(psk, psklen); | |
2726 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2727 | OPENSSL_clear_free(tmppsk, psklen); | |
2728 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2729 | |
13c0ec4a MC |
2730 | return ret; |
2731 | #else | |
05ec6a25 | 2732 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2733 | *al = SSL_AD_INTERNAL_ERROR; |
2734 | return 0; | |
b9908bf9 | 2735 | #endif |
13c0ec4a | 2736 | } |
b9908bf9 | 2737 | |
f1ec23c0 | 2738 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2739 | { |
bc36ee62 | 2740 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2741 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2742 | EVP_PKEY *pkey = NULL; |
2743 | EVP_PKEY_CTX *pctx = NULL; | |
2744 | size_t enclen; | |
2745 | unsigned char *pms = NULL; | |
2746 | size_t pmslen = 0; | |
b9908bf9 | 2747 | |
13c0ec4a MC |
2748 | if (s->session->peer == NULL) { |
2749 | /* | |
2750 | * We should always have a server certificate with SSL_kRSA. | |
2751 | */ | |
05ec6a25 | 2752 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2753 | return 0; |
2754 | } | |
0f113f3e | 2755 | |
13c0ec4a MC |
2756 | pkey = X509_get0_pubkey(s->session->peer); |
2757 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2758 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2759 | return 0; |
2760 | } | |
0f113f3e | 2761 | |
13c0ec4a MC |
2762 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2763 | pms = OPENSSL_malloc(pmslen); | |
2764 | if (pms == NULL) { | |
05ec6a25 | 2765 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2766 | *al = SSL_AD_INTERNAL_ERROR; |
2767 | return 0; | |
2768 | } | |
0bce0b02 | 2769 | |
13c0ec4a MC |
2770 | pms[0] = s->client_version >> 8; |
2771 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2772 | /* TODO(size_t): Convert this function */ |
2773 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2774 | goto err; |
2775 | } | |
0f113f3e | 2776 | |
13c0ec4a | 2777 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2778 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2779 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2780 | goto err; | |
2781 | } | |
13c0ec4a MC |
2782 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2783 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2784 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2785 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2786 | goto err; |
2787 | } | |
f1ec23c0 MC |
2788 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2789 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2790 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2791 | goto err; |
2792 | } | |
13c0ec4a MC |
2793 | EVP_PKEY_CTX_free(pctx); |
2794 | pctx = NULL; | |
0f113f3e | 2795 | |
13c0ec4a | 2796 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2797 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2798 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2799 | goto err; | |
b9908bf9 | 2800 | } |
13c0ec4a MC |
2801 | |
2802 | s->s3->tmp.pms = pms; | |
2803 | s->s3->tmp.pmslen = pmslen; | |
2804 | ||
2faa1b48 CB |
2805 | /* Log the premaster secret, if logging is enabled. */ |
2806 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2807 | goto err; | |
2808 | ||
13c0ec4a MC |
2809 | return 1; |
2810 | err: | |
2811 | OPENSSL_clear_free(pms, pmslen); | |
2812 | EVP_PKEY_CTX_free(pctx); | |
2813 | ||
2814 | return 0; | |
2815 | #else | |
05ec6a25 | 2816 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2817 | *al = SSL_AD_INTERNAL_ERROR; |
2818 | return 0; | |
f9b3bff6 | 2819 | #endif |
13c0ec4a MC |
2820 | } |
2821 | ||
f1ec23c0 | 2822 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2823 | { |
2824 | #ifndef OPENSSL_NO_DH | |
2825 | DH *dh_clnt = NULL; | |
2826 | const BIGNUM *pub_key; | |
2827 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2828 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2829 | |
2830 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2831 | if (skey == NULL) |
2832 | goto err; | |
2833 | ||
0a699a07 | 2834 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2835 | if (ckey == NULL) |
2836 | goto err; | |
2837 | ||
a8c1c704 MC |
2838 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2839 | ||
0f1e51ea | 2840 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2841 | goto err; |
a8c1c704 MC |
2842 | |
2843 | /* send off the data */ | |
2844 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2845 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2846 | goto err; |
2847 | ||
2848 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2849 | EVP_PKEY_free(ckey); |
2850 | ||
2851 | return 1; | |
f1ec23c0 MC |
2852 | err: |
2853 | EVP_PKEY_free(ckey); | |
2854 | #endif | |
05ec6a25 | 2855 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2856 | *al = SSL_AD_INTERNAL_ERROR; |
2857 | return 0; | |
a8c1c704 MC |
2858 | } |
2859 | ||
f1ec23c0 | 2860 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2861 | { |
2862 | #ifndef OPENSSL_NO_EC | |
2863 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2864 | size_t encoded_pt_len = 0; |
67ad5aab | 2865 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2866 | int ret = 0; |
67ad5aab MC |
2867 | |
2868 | skey = s->s3->peer_tmp; | |
ec24630a | 2869 | if (skey == NULL) { |
05ec6a25 | 2870 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2871 | return 0; |
2872 | } | |
2873 | ||
0a699a07 | 2874 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2875 | if (ckey == NULL) { |
2876 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2877 | goto err; | |
2878 | } | |
67ad5aab | 2879 | |
0f1e51ea | 2880 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2881 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2882 | goto err; |
2883 | } | |
2884 | ||
2885 | /* Generate encoding of client key */ | |
ec24630a | 2886 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2887 | |
2888 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2889 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2890 | goto err; |
2891 | } | |
2892 | ||
b2b3024e | 2893 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2894 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2895 | goto err; | |
2896 | } | |
67ad5aab | 2897 | |
f1ec23c0 | 2898 | ret = 1; |
67ad5aab | 2899 | err: |
f1ec23c0 | 2900 | OPENSSL_free(encodedPoint); |
67ad5aab | 2901 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2902 | return ret; |
67ad5aab | 2903 | #else |
05ec6a25 | 2904 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2905 | *al = SSL_AD_INTERNAL_ERROR; |
2906 | return 0; | |
2907 | #endif | |
2908 | } | |
2909 | ||
f1ec23c0 | 2910 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2911 | { |
2912 | #ifndef OPENSSL_NO_GOST | |
2913 | /* GOST key exchange message creation */ | |
2914 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2915 | X509 *peer_cert; | |
2916 | size_t msglen; | |
2917 | unsigned int md_len; | |
2918 | unsigned char shared_ukm[32], tmp[256]; | |
2919 | EVP_MD_CTX *ukm_hash = NULL; | |
2920 | int dgst_nid = NID_id_GostR3411_94; | |
2921 | unsigned char *pms = NULL; | |
2922 | size_t pmslen = 0; | |
2923 | ||
2924 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2925 | dgst_nid = NID_id_GostR3411_2012_256; | |
2926 | ||
2927 | /* | |
2928 | * Get server sertificate PKEY and create ctx from it | |
2929 | */ | |
2930 | peer_cert = s->session->peer; | |
2931 | if (!peer_cert) { | |
2932 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2933 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2934 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2935 | return 0; | |
2936 | } | |
2937 | ||
2938 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2939 | if (pkey_ctx == NULL) { | |
2940 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2941 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2942 | return 0; |
2943 | } | |
2944 | /* | |
2945 | * If we have send a certificate, and certificate key | |
2946 | * parameters match those of server certificate, use | |
2947 | * certificate key for key exchange | |
2948 | */ | |
2949 | ||
2950 | /* Otherwise, generate ephemeral key pair */ | |
2951 | pmslen = 32; | |
2952 | pms = OPENSSL_malloc(pmslen); | |
2953 | if (pms == NULL) { | |
2954 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2955 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2956 | goto err; |
e00e0b3d MC |
2957 | } |
2958 | ||
2959 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2960 | /* Generate session key |
2961 | * TODO(size_t): Convert this function | |
2962 | */ | |
2963 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2964 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2965 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2966 | goto err; |
2967 | }; | |
e00e0b3d MC |
2968 | /* |
2969 | * Compute shared IV and store it in algorithm-specific context | |
2970 | * data | |
2971 | */ | |
2972 | ukm_hash = EVP_MD_CTX_new(); | |
2973 | if (ukm_hash == NULL | |
a230b26e EK |
2974 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2975 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2976 | SSL3_RANDOM_SIZE) <= 0 | |
2977 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2978 | SSL3_RANDOM_SIZE) <= 0 | |
2979 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2980 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2981 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2982 | goto err; |
2983 | } | |
2984 | EVP_MD_CTX_free(ukm_hash); | |
2985 | ukm_hash = NULL; | |
2986 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2987 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2988 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2989 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2990 | goto err; |
2991 | } | |
2992 | /* Make GOST keytransport blob message */ | |
2993 | /* | |
2994 | * Encapsulate it into sequence | |
2995 | */ | |
e00e0b3d MC |
2996 | msglen = 255; |
2997 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2998 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2999 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3000 | goto err; |
3001 | } | |
f1ec23c0 | 3002 | |
08029dfa MC |
3003 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3004 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3005 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3006 | *al = SSL_AD_INTERNAL_ERROR; |
3007 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3008 | goto err; | |
e00e0b3d | 3009 | } |
f1ec23c0 | 3010 | |
e00e0b3d MC |
3011 | EVP_PKEY_CTX_free(pkey_ctx); |
3012 | s->s3->tmp.pms = pms; | |
3013 | s->s3->tmp.pmslen = pmslen; | |
3014 | ||
3015 | return 1; | |
3016 | err: | |
3017 | EVP_PKEY_CTX_free(pkey_ctx); | |
3018 | OPENSSL_clear_free(pms, pmslen); | |
3019 | EVP_MD_CTX_free(ukm_hash); | |
3020 | return 0; | |
3021 | #else | |
05ec6a25 | 3022 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3023 | *al = SSL_AD_INTERNAL_ERROR; |
3024 | return 0; | |
3025 | #endif | |
3026 | } | |
3027 | ||
f1ec23c0 | 3028 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3029 | { |
8b9546c7 | 3030 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3031 | unsigned char *abytes = NULL; |
3032 | ||
3033 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3034 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3035 | &abytes)) { | |
05ec6a25 | 3036 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3037 | return 0; |
3038 | } | |
f1ec23c0 MC |
3039 | BN_bn2bin(s->srp_ctx.A, abytes); |
3040 | ||
840a2bf8 MC |
3041 | OPENSSL_free(s->session->srp_username); |
3042 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3043 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3044 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3045 | return 0; |
3046 | } | |
3047 | ||
3048 | return 1; | |
3049 | #else | |
05ec6a25 | 3050 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3051 | *al = SSL_AD_INTERNAL_ERROR; |
3052 | return 0; | |
3053 | #endif | |
3054 | } | |
3055 | ||
7cea05dc | 3056 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3057 | { |
13c0ec4a MC |
3058 | unsigned long alg_k; |
3059 | int al = -1; | |
3060 | ||
f1ec23c0 | 3061 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3062 | |
13c0ec4a | 3063 | if ((alg_k & SSL_PSK) |
7cea05dc | 3064 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3065 | goto err; |
3066 | ||
f1ec23c0 | 3067 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3068 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3069 | goto err; |
a8c1c704 | 3070 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3071 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3072 | goto err; |
67ad5aab | 3073 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3074 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3075 | goto err; |
e00e0b3d | 3076 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3077 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3078 | goto err; |
840a2bf8 | 3079 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3080 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3081 | goto err; |
4a424545 | 3082 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3083 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3084 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3085 | goto err; | |
3086 | } | |
3087 | ||
b9908bf9 | 3088 | return 1; |
0f113f3e | 3089 | err: |
13c0ec4a MC |
3090 | if (al != -1) |
3091 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3092 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3093 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3094 | #ifndef OPENSSL_NO_PSK |
3095 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3096 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3097 | #endif |
b9908bf9 MC |
3098 | return 0; |
3099 | } | |
3100 | ||
3101 | int tls_client_key_exchange_post_work(SSL *s) | |
3102 | { | |
3103 | unsigned char *pms = NULL; | |
3104 | size_t pmslen = 0; | |
3105 | ||
6f137370 MC |
3106 | pms = s->s3->tmp.pms; |
3107 | pmslen = s->s3->tmp.pmslen; | |
3108 | ||
b9908bf9 MC |
3109 | #ifndef OPENSSL_NO_SRP |
3110 | /* Check for SRP */ | |
3111 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3112 | if (!srp_generate_client_master_secret(s)) { | |
3113 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3114 | ERR_R_INTERNAL_ERROR); | |
3115 | goto err; | |
3116 | } | |
3117 | return 1; | |
3118 | } | |
3119 | #endif | |
b9908bf9 MC |
3120 | |
3121 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3122 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3123 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3124 | goto err; | |
3125 | } | |
3126 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3127 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3128 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3129 | /* ssl_generate_master_secret frees the pms even on error */ |
3130 | pms = NULL; | |
3131 | pmslen = 0; | |
b9908bf9 MC |
3132 | goto err; |
3133 | } | |
6f137370 MC |
3134 | pms = NULL; |
3135 | pmslen = 0; | |
473483d4 MC |
3136 | |
3137 | #ifndef OPENSSL_NO_SCTP | |
3138 | if (SSL_IS_DTLS(s)) { | |
3139 | unsigned char sctpauthkey[64]; | |
3140 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3141 | ||
3142 | /* | |
3143 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3144 | * used. | |
3145 | */ | |
141eb8c6 MC |
3146 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3147 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3148 | |
3149 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3150 | sizeof(sctpauthkey), labelbuffer, |
3151 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3152 | goto err; |
3153 | ||
3154 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3155 | sizeof(sctpauthkey), sctpauthkey); | |
3156 | } | |
3157 | #endif | |
3158 | ||
b9908bf9 MC |
3159 | return 1; |
3160 | err: | |
3161 | OPENSSL_clear_free(pms, pmslen); | |
3162 | s->s3->tmp.pms = NULL; | |
3163 | return 0; | |
0f113f3e | 3164 | } |
d02b48c6 | 3165 | |
0f113f3e MC |
3166 | /* |
3167 | * Check a certificate can be used for client authentication. Currently check | |
3168 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3169 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3170 | */ |
3171 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3172 | { |
0f113f3e | 3173 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3174 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3175 | return 0; |
3176 | /* | |
3177 | * If strict mode check suitability of chain before using it. This also | |
3178 | * adjusts suite B digest if necessary. | |
3179 | */ | |
3180 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3181 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3182 | return 0; | |
0f113f3e MC |
3183 | return 1; |
3184 | } | |
0d609395 | 3185 | |
be3583fa | 3186 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3187 | { |
3188 | X509 *x509 = NULL; | |
3189 | EVP_PKEY *pkey = NULL; | |
3190 | int i; | |
3191 | ||
b9908bf9 | 3192 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3193 | /* Let cert callback update client certificates if required */ |
3194 | if (s->cert->cert_cb) { | |
3195 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3196 | if (i < 0) { | |
3197 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3198 | return WORK_MORE_A; |
0f113f3e MC |
3199 | } |
3200 | if (i == 0) { | |
3201 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3202 | ossl_statem_set_error(s); |
0f113f3e MC |
3203 | return 0; |
3204 | } | |
3205 | s->rwstate = SSL_NOTHING; | |
3206 | } | |
3207 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3208 | return WORK_FINISHED_CONTINUE; |
3209 | ||
3210 | /* Fall through to WORK_MORE_B */ | |
3211 | wst = WORK_MORE_B; | |
0f113f3e MC |
3212 | } |
3213 | ||
3214 | /* We need to get a client cert */ | |
b9908bf9 | 3215 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3216 | /* |
3217 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3218 | * return(-1); We then get retied later | |
3219 | */ | |
0f113f3e MC |
3220 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3221 | if (i < 0) { | |
3222 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3223 | return WORK_MORE_B; |
0f113f3e MC |
3224 | } |
3225 | s->rwstate = SSL_NOTHING; | |
3226 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3227 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3228 | i = 0; | |
3229 | } else if (i == 1) { | |
3230 | i = 0; | |
b9908bf9 | 3231 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3232 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3233 | } | |
3234 | ||
222561fe | 3235 | X509_free(x509); |
25aaa98a | 3236 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3237 | if (i && !ssl3_check_client_certificate(s)) |
3238 | i = 0; | |
3239 | if (i == 0) { | |
3240 | if (s->version == SSL3_VERSION) { | |
3241 | s->s3->tmp.cert_req = 0; | |
3242 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3243 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3244 | } else { |
3245 | s->s3->tmp.cert_req = 2; | |
124037fd | 3246 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3247 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3248 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3249 | return 0; |
3250 | } | |
0f113f3e MC |
3251 | } |
3252 | } | |
3253 | ||
b9908bf9 | 3254 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3255 | } |
3256 | ||
b9908bf9 MC |
3257 | /* Shouldn't ever get here */ |
3258 | return WORK_ERROR; | |
3259 | } | |
3260 | ||
7cea05dc | 3261 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3262 | { |
0baed5e9 | 3263 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3264 | |
3265 | /* | |
3266 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3267 | * later | |
3268 | */ | |
3269 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3270 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3271 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3272 | : s->cert->key, |
3273 | &al)) { | |
b9908bf9 | 3274 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3275 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3276 | return 0; |
0f113f3e | 3277 | } |
b9908bf9 MC |
3278 | |
3279 | return 1; | |
0f113f3e MC |
3280 | } |
3281 | ||
3282 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3283 | |
36d16f8e | 3284 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3285 | { |
60f43e9e RL |
3286 | int i; |
3287 | #ifndef OPENSSL_NO_EC | |
3288 | int idx; | |
3289 | #endif | |
0f113f3e MC |
3290 | long alg_k, alg_a; |
3291 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3292 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3293 | |
0f113f3e MC |
3294 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3295 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3296 | |
0f113f3e | 3297 | /* we don't have a certificate */ |
55a9a16f | 3298 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3299 | return (1); |
d02b48c6 | 3300 | |
0f113f3e | 3301 | /* This is the passed certificate */ |
d02b48c6 | 3302 | |
10bf4fc2 | 3303 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3304 | idx = s->session->peer_type; |
0f113f3e | 3305 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3306 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3307 | /* check failed */ |
3308 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3309 | goto f_err; | |
3310 | } else { | |
3311 | return 1; | |
3312 | } | |
3313 | } else if (alg_a & SSL_aECDSA) { | |
3314 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3315 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3316 | goto f_err; | |
0f113f3e MC |
3317 | } |
3318 | #endif | |
8382fd3a | 3319 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3320 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3321 | |
3322 | /* Check that we have a certificate if we require one */ | |
3323 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3324 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3325 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3326 | goto f_err; | |
3327 | } | |
bc36ee62 | 3328 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3329 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3330 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3331 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3332 | goto f_err; | |
3333 | } | |
d02b48c6 | 3334 | #endif |
bc36ee62 | 3335 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3336 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3337 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3338 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3339 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3340 | goto f_err; | |
0f113f3e | 3341 | } |
79df9d62 | 3342 | #endif |
bc36ee62 | 3343 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3344 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3345 | al = SSL_AD_INTERNAL_ERROR; |
3346 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3347 | goto f_err; |
0f113f3e | 3348 | } |
d02b48c6 RE |
3349 | #endif |
3350 | ||
0f113f3e MC |
3351 | return (1); |
3352 | f_err: | |
26c79d56 | 3353 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3354 | return (0); |
3355 | } | |
3356 | ||
e481f9b9 | 3357 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3358 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3359 | { |
15e6be6c MC |
3360 | size_t len, padding_len; |
3361 | unsigned char *padding = NULL; | |
15e6be6c | 3362 | |
aff8c126 | 3363 | len = s->ext.npn_len; |
b9908bf9 | 3364 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3365 | |
aff8c126 | 3366 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3367 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3368 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3369 | goto err; | |
3370 | } | |
3371 | ||
3372 | memset(padding, 0, padding_len); | |
3373 | ||
b9908bf9 | 3374 | return 1; |
15e6be6c | 3375 | err: |
15e6be6c MC |
3376 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3377 | return 0; | |
b9908bf9 | 3378 | } |
6434abbf | 3379 | #endif |
368888bc | 3380 | |
c7f47786 MC |
3381 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3382 | { | |
3383 | if (PACKET_remaining(pkt) > 0) { | |
3384 | /* should contain no data */ | |
3385 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3386 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3387 | ossl_statem_set_error(s); | |
3388 | return MSG_PROCESS_ERROR; | |
3389 | } | |
3390 | ||
3391 | /* | |
1f04f23e MC |
3392 | * This is a historical discrepancy (not in the RFC) maintained for |
3393 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3394 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3395 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3396 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3397 | */ |
3398 | if (SSL_IS_DTLS(s)) | |
3399 | SSL_renegotiate(s); | |
3400 | else | |
3401 | SSL_renegotiate_abbreviated(s); | |
3402 | ||
3403 | return MSG_PROCESS_FINISHED_READING; | |
3404 | } | |
3405 | ||
e46f2334 MC |
3406 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3407 | { | |
3408 | int al = SSL_AD_INTERNAL_ERROR; | |
3409 | PACKET extensions; | |
3434f40b | 3410 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3411 | |
e46f2334 MC |
3412 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3413 | al = SSL_AD_DECODE_ERROR; | |
3414 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3415 | goto err; | |
3416 | } | |
3417 | ||
e96e0f8e | 3418 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
fc5ece2e | 3419 | &rawexts, &al, NULL) |
e96e0f8e | 3420 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3421 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3422 | goto err; |
3423 | ||
1b0286a3 | 3424 | OPENSSL_free(rawexts); |
e46f2334 MC |
3425 | return MSG_PROCESS_CONTINUE_READING; |
3426 | ||
3427 | err: | |
3428 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3429 | ossl_statem_set_error(s); | |
1b0286a3 | 3430 | OPENSSL_free(rawexts); |
e46f2334 MC |
3431 | return MSG_PROCESS_ERROR; |
3432 | } | |
3433 | ||
368888bc | 3434 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3435 | { |
3436 | int i = 0; | |
368888bc | 3437 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3438 | if (s->ctx->client_cert_engine) { |
3439 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3440 | SSL_get_client_CA_list(s), | |
3441 | px509, ppkey, NULL, NULL, NULL); | |
3442 | if (i != 0) | |
3443 | return i; | |
3444 | } | |
3445 | #endif | |
3446 | if (s->ctx->client_cert_cb) | |
3447 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3448 | return i; | |
3449 | } | |
d45ba43d | 3450 | |
ae2f7b37 | 3451 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3452 | { |
2c7b4dbc MC |
3453 | int i; |
3454 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3455 | int empty_reneg_info_scsv = !s->renegotiate; |
3456 | /* Set disabled masks for this session */ | |
3457 | ssl_set_client_disabled(s); | |
3458 | ||
3459 | if (sk == NULL) | |
3460 | return (0); | |
d45ba43d | 3461 | |
2c7b4dbc MC |
3462 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3463 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3464 | # error Max cipher length too short | |
3465 | # endif | |
3466 | /* | |
3467 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3468 | * chop number of supported ciphers to keep it well below this if we | |
3469 | * use TLS v1.2 | |
3470 | */ | |
3471 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3472 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3473 | else | |
3474 | #endif | |
3475 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3476 | maxlen = 0xfffe; | |
3477 | ||
3478 | if (empty_reneg_info_scsv) | |
3479 | maxlen -= 2; | |
3480 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3481 | maxlen -= 2; | |
3482 | ||
3483 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3484 | const SSL_CIPHER *c; | |
3485 | ||
d45ba43d MC |
3486 | c = sk_SSL_CIPHER_value(sk, i); |
3487 | /* Skip disabled ciphers */ | |
3488 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3489 | continue; | |
2c7b4dbc MC |
3490 | |
3491 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3492 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3493 | return 0; | |
3494 | } | |
3495 | ||
3496 | totlen += len; | |
d45ba43d | 3497 | } |
2c7b4dbc MC |
3498 | |
3499 | if (totlen == 0) { | |
3500 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3501 | return 0; | |
3502 | } | |
3503 | ||
3504 | if (totlen != 0) { | |
d45ba43d MC |
3505 | if (empty_reneg_info_scsv) { |
3506 | static SSL_CIPHER scsv = { | |
3507 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3508 | }; | |
2c7b4dbc MC |
3509 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3510 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3511 | return 0; | |
3512 | } | |
d45ba43d MC |
3513 | } |
3514 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3515 | static SSL_CIPHER scsv = { | |
3516 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3517 | }; | |
2c7b4dbc MC |
3518 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3519 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3520 | return 0; | |
3521 | } | |
d45ba43d MC |
3522 | } |
3523 | } | |
3524 | ||
2c7b4dbc | 3525 | return 1; |
d45ba43d | 3526 | } |