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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 | ||
126 | /* | |
127 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
128 | * yet negotiated TLSv1.3 at that point so that is handled by | |
129 | * ossl_statem_client_read_transition() | |
130 | */ | |
131 | ||
132 | switch (st->hand_state) { | |
133 | default: | |
134 | break; | |
135 | ||
3847d426 MC |
136 | case TLS_ST_CW_CLNT_HELLO: |
137 | /* | |
138 | * This must a ClientHello following a HelloRetryRequest, so the only | |
139 | * thing we can get now is a ServerHello. | |
140 | */ | |
141 | if (mt == SSL3_MT_SERVER_HELLO) { | |
142 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
143 | return 1; | |
144 | } | |
145 | break; | |
146 | ||
0f1e51ea | 147 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
148 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
149 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
150 | return 1; | |
151 | } | |
152 | break; | |
153 | ||
154 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 155 | if (s->hit) { |
92760c21 MC |
156 | if (mt == SSL3_MT_FINISHED) { |
157 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
158 | return 1; |
159 | } | |
160 | } else { | |
92760c21 MC |
161 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
162 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
163 | return 1; | |
f5ca0b04 MC |
164 | } |
165 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
166 | st->hand_state = TLS_ST_CR_CERT; |
167 | return 1; | |
168 | } | |
169 | } | |
170 | break; | |
171 | ||
92760c21 MC |
172 | case TLS_ST_CR_CERT_REQ: |
173 | if (mt == SSL3_MT_CERTIFICATE) { | |
174 | st->hand_state = TLS_ST_CR_CERT; | |
175 | return 1; | |
176 | } | |
177 | break; | |
178 | ||
0f1e51ea | 179 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
180 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
181 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
182 | return 1; | |
183 | } | |
184 | break; | |
185 | ||
186 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
187 | if (mt == SSL3_MT_FINISHED) { |
188 | st->hand_state = TLS_ST_CR_FINISHED; | |
189 | return 1; | |
190 | } | |
191 | break; | |
cc2455bf MC |
192 | |
193 | case TLS_ST_OK: | |
49e7fe12 MC |
194 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING |
195 | && mt == SSL3_MT_SERVER_HELLO) { | |
196 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
197 | return 1; | |
198 | } | |
cc2455bf MC |
199 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
200 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
201 | return 1; | |
202 | } | |
e1c3de44 MC |
203 | if (mt == SSL3_MT_KEY_UPDATE) { |
204 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
205 | return 1; | |
206 | } | |
cc2455bf | 207 | break; |
0f1e51ea MC |
208 | } |
209 | ||
0f1e51ea | 210 | /* No valid transition found */ |
0f1e51ea MC |
211 | return 0; |
212 | } | |
213 | ||
61ae935a | 214 | /* |
8481f583 MC |
215 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
216 | * handshake state transitions when the client is reading messages from the | |
217 | * server. The message type that the server has sent is provided in |mt|. The | |
218 | * current state is in |s->statem.hand_state|. | |
61ae935a | 219 | * |
94ed2c67 MC |
220 | * Return values are 1 for success (transition allowed) and 0 on error |
221 | * (transition not allowed) | |
61ae935a | 222 | */ |
8481f583 | 223 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 224 | { |
d6f1a6e9 | 225 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 226 | int ske_expected; |
61ae935a | 227 | |
0f1e51ea | 228 | /* |
3847d426 MC |
229 | * Note that after writing the first ClientHello we don't know what version |
230 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 231 | */ |
f5ca0b04 | 232 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
233 | if (!ossl_statem_client13_read_transition(s, mt)) |
234 | goto err; | |
235 | return 1; | |
236 | } | |
0f1e51ea | 237 | |
a230b26e | 238 | switch (st->hand_state) { |
f3b3d7f0 RS |
239 | default: |
240 | break; | |
241 | ||
61ae935a MC |
242 | case TLS_ST_CW_CLNT_HELLO: |
243 | if (mt == SSL3_MT_SERVER_HELLO) { | |
244 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
245 | return 1; | |
246 | } | |
247 | ||
248 | if (SSL_IS_DTLS(s)) { | |
249 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
250 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
251 | return 1; | |
252 | } | |
3847d426 MC |
253 | } else { |
254 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
255 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
256 | return 1; | |
257 | } | |
61ae935a MC |
258 | } |
259 | break; | |
260 | ||
261 | case TLS_ST_CR_SRVR_HELLO: | |
262 | if (s->hit) { | |
aff8c126 | 263 | if (s->ext.ticket_expected) { |
61ae935a MC |
264 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
265 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
266 | return 1; | |
267 | } | |
268 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
269 | st->hand_state = TLS_ST_CR_CHANGE; | |
270 | return 1; | |
271 | } | |
272 | } else { | |
273 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
274 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
275 | return 1; | |
ad3819c2 | 276 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
277 | && s->ext.session_secret_cb != NULL |
278 | && s->session->ext.tick != NULL | |
a230b26e | 279 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
280 | /* |
281 | * Normally, we can tell if the server is resuming the session | |
282 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
283 | * the next server message after the ServerHello to determine if | |
284 | * the server is resuming. | |
285 | */ | |
286 | s->hit = 1; | |
287 | st->hand_state = TLS_ST_CR_CHANGE; | |
288 | return 1; | |
61ae935a | 289 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 290 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
291 | if (mt == SSL3_MT_CERTIFICATE) { |
292 | st->hand_state = TLS_ST_CR_CERT; | |
293 | return 1; | |
294 | } | |
295 | } else { | |
a455d0f6 | 296 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
297 | /* SKE is optional for some PSK ciphersuites */ |
298 | if (ske_expected | |
a230b26e EK |
299 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
300 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
301 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
302 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
303 | return 1; | |
304 | } | |
305 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
306 | && cert_req_allowed(s)) { |
307 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
308 | return 1; | |
a455d0f6 | 309 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
310 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
311 | return 1; | |
61ae935a MC |
312 | } |
313 | } | |
314 | } | |
315 | break; | |
316 | ||
317 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
318 | /* |
319 | * The CertificateStatus message is optional even if | |
aff8c126 | 320 | * |ext.status_expected| is set |
bb1aaab4 | 321 | */ |
aff8c126 | 322 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
323 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
324 | return 1; | |
a455d0f6 MC |
325 | } |
326 | /* Fall through */ | |
327 | ||
328 | case TLS_ST_CR_CERT_STATUS: | |
329 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 330 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
331 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
332 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
333 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
334 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
335 | return 1; | |
61ae935a | 336 | } |
672f3337 | 337 | goto err; |
61ae935a | 338 | } |
a455d0f6 | 339 | /* Fall through */ |
61ae935a | 340 | |
a455d0f6 MC |
341 | case TLS_ST_CR_KEY_EXCH: |
342 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
343 | if (cert_req_allowed(s)) { | |
61ae935a MC |
344 | st->hand_state = TLS_ST_CR_CERT_REQ; |
345 | return 1; | |
61ae935a | 346 | } |
672f3337 | 347 | goto err; |
61ae935a | 348 | } |
a455d0f6 | 349 | /* Fall through */ |
61ae935a MC |
350 | |
351 | case TLS_ST_CR_CERT_REQ: | |
352 | if (mt == SSL3_MT_SERVER_DONE) { | |
353 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
354 | return 1; | |
355 | } | |
356 | break; | |
357 | ||
358 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 359 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
360 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
361 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
362 | return 1; | |
363 | } | |
61ae935a MC |
364 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
365 | st->hand_state = TLS_ST_CR_CHANGE; | |
366 | return 1; | |
367 | } | |
368 | break; | |
369 | ||
370 | case TLS_ST_CR_SESSION_TICKET: | |
371 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
372 | st->hand_state = TLS_ST_CR_CHANGE; | |
373 | return 1; | |
374 | } | |
375 | break; | |
376 | ||
377 | case TLS_ST_CR_CHANGE: | |
378 | if (mt == SSL3_MT_FINISHED) { | |
379 | st->hand_state = TLS_ST_CR_FINISHED; | |
380 | return 1; | |
381 | } | |
382 | break; | |
c7f47786 MC |
383 | |
384 | case TLS_ST_OK: | |
49e7fe12 MC |
385 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) { |
386 | /* | |
387 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
388 | * data. The only thing allowed now is a ServerHello or a | |
389 | * HelloRetryRequest. | |
390 | */ | |
391 | if (mt == SSL3_MT_SERVER_HELLO) { | |
392 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
393 | return 1; | |
394 | } | |
395 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
396 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
397 | return 1; | |
398 | } | |
399 | } else if (mt == SSL3_MT_HELLO_REQUEST) { | |
c7f47786 MC |
400 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
401 | return 1; | |
402 | } | |
403 | break; | |
61ae935a MC |
404 | } |
405 | ||
672f3337 | 406 | err: |
61ae935a | 407 | /* No valid transition found */ |
672f3337 | 408 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 409 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
410 | return 0; |
411 | } | |
412 | ||
413 | /* | |
0f1e51ea MC |
414 | * ossl_statem_client13_write_transition() works out what handshake state to |
415 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
416 | * server. | |
0f1e51ea MC |
417 | */ |
418 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
419 | { | |
420 | OSSL_STATEM *st = &s->statem; | |
421 | ||
422 | /* | |
3847d426 MC |
423 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
424 | * TLSv1.3 yet at that point. They are handled by | |
425 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
426 | */ |
427 | switch (st->hand_state) { | |
428 | default: | |
429 | /* Shouldn't happen */ | |
430 | return WRITE_TRAN_ERROR; | |
431 | ||
3847d426 MC |
432 | case TLS_ST_CW_CLNT_HELLO: |
433 | /* We only hit this in the case of HelloRetryRequest */ | |
434 | return WRITE_TRAN_FINISHED; | |
435 | ||
436 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
437 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
438 | return WRITE_TRAN_CONTINUE; | |
439 | ||
92760c21 | 440 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 441 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 442 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
443 | return WRITE_TRAN_CONTINUE; |
444 | ||
445 | case TLS_ST_CW_CERT: | |
446 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 447 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 448 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
449 | return WRITE_TRAN_CONTINUE; |
450 | ||
451 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
452 | st->hand_state = TLS_ST_CW_FINISHED; |
453 | return WRITE_TRAN_CONTINUE; | |
454 | ||
e1c3de44 | 455 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
456 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
457 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
458 | return WRITE_TRAN_CONTINUE; | |
459 | } | |
460 | /* Fall through */ | |
461 | ||
9412b3ad | 462 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 463 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 464 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
465 | st->hand_state = TLS_ST_OK; |
466 | ossl_statem_set_in_init(s, 0); | |
467 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
468 | |
469 | case TLS_ST_OK: | |
9412b3ad MC |
470 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
471 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
472 | return WRITE_TRAN_CONTINUE; | |
473 | } | |
474 | ||
475 | /* Try to read from the server instead */ | |
cc2455bf | 476 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
477 | } |
478 | } | |
479 | ||
480 | /* | |
481 | * ossl_statem_client_write_transition() works out what handshake state to | |
482 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 483 | */ |
8481f583 | 484 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 485 | { |
d6f1a6e9 | 486 | OSSL_STATEM *st = &s->statem; |
61ae935a | 487 | |
0f1e51ea MC |
488 | /* |
489 | * Note that immediately before/after a ClientHello we don't know what | |
490 | * version we are going to negotiate yet, so we don't take this branch until | |
491 | * later | |
492 | */ | |
f5ca0b04 | 493 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
494 | return ossl_statem_client13_write_transition(s); |
495 | ||
a230b26e | 496 | switch (st->hand_state) { |
f3b3d7f0 RS |
497 | default: |
498 | /* Shouldn't happen */ | |
499 | return WRITE_TRAN_ERROR; | |
500 | ||
a230b26e | 501 | case TLS_ST_OK: |
49e7fe12 MC |
502 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) { |
503 | /* | |
504 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
505 | * actually selected a version yet. | |
506 | */ | |
507 | return WRITE_TRAN_FINISHED; | |
508 | } | |
c7f47786 MC |
509 | if (!s->renegotiate) { |
510 | /* | |
511 | * We haven't requested a renegotiation ourselves so we must have | |
512 | * received a message from the server. Better read it. | |
513 | */ | |
514 | return WRITE_TRAN_FINISHED; | |
515 | } | |
a230b26e EK |
516 | /* Renegotiation - fall through */ |
517 | case TLS_ST_BEFORE: | |
518 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
519 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 520 | |
a230b26e | 521 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
522 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
523 | /* | |
524 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
525 | * actually selected a version yet. | |
526 | */ | |
527 | st->hand_state = TLS_ST_OK; | |
528 | ossl_statem_set_in_init(s, 0); | |
529 | return WRITE_TRAN_CONTINUE; | |
530 | } | |
a230b26e EK |
531 | /* |
532 | * No transition at the end of writing because we don't know what | |
533 | * we will be sent | |
534 | */ | |
535 | return WRITE_TRAN_FINISHED; | |
61ae935a | 536 | |
a230b26e EK |
537 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
538 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
539 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 540 | |
a230b26e EK |
541 | case TLS_ST_CR_SRVR_DONE: |
542 | if (s->s3->tmp.cert_req) | |
543 | st->hand_state = TLS_ST_CW_CERT; | |
544 | else | |
61ae935a | 545 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 546 | return WRITE_TRAN_CONTINUE; |
61ae935a | 547 | |
a230b26e EK |
548 | case TLS_ST_CW_CERT: |
549 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
550 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 551 | |
a230b26e EK |
552 | case TLS_ST_CW_KEY_EXCH: |
553 | /* | |
554 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
555 | * sent, but no verify packet is sent | |
556 | */ | |
557 | /* | |
558 | * XXX: For now, we do not support client authentication in ECDH | |
559 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
560 | * need to skip the certificate verify message when client's | |
561 | * ECDH public key is sent inside the client certificate. | |
562 | */ | |
563 | if (s->s3->tmp.cert_req == 1) { | |
564 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
565 | } else { | |
61ae935a | 566 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
567 | } |
568 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
569 | st->hand_state = TLS_ST_CW_CHANGE; | |
570 | } | |
571 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 572 | |
a230b26e EK |
573 | case TLS_ST_CW_CERT_VRFY: |
574 | st->hand_state = TLS_ST_CW_CHANGE; | |
575 | return WRITE_TRAN_CONTINUE; | |
576 | ||
577 | case TLS_ST_CW_CHANGE: | |
61ae935a | 578 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 579 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 580 | #else |
aff8c126 | 581 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
582 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
583 | else | |
584 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 585 | #endif |
a230b26e | 586 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
587 | |
588 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
589 | case TLS_ST_CW_NEXT_PROTO: |
590 | st->hand_state = TLS_ST_CW_FINISHED; | |
591 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
592 | #endif |
593 | ||
a230b26e EK |
594 | case TLS_ST_CW_FINISHED: |
595 | if (s->hit) { | |
596 | st->hand_state = TLS_ST_OK; | |
597 | ossl_statem_set_in_init(s, 0); | |
598 | return WRITE_TRAN_CONTINUE; | |
599 | } else { | |
600 | return WRITE_TRAN_FINISHED; | |
601 | } | |
61ae935a | 602 | |
a230b26e EK |
603 | case TLS_ST_CR_FINISHED: |
604 | if (s->hit) { | |
605 | st->hand_state = TLS_ST_CW_CHANGE; | |
606 | return WRITE_TRAN_CONTINUE; | |
607 | } else { | |
608 | st->hand_state = TLS_ST_OK; | |
609 | ossl_statem_set_in_init(s, 0); | |
610 | return WRITE_TRAN_CONTINUE; | |
611 | } | |
c7f47786 MC |
612 | |
613 | case TLS_ST_CR_HELLO_REQ: | |
614 | /* | |
615 | * If we can renegotiate now then do so, otherwise wait for a more | |
616 | * convenient time. | |
617 | */ | |
618 | if (ssl3_renegotiate_check(s, 1)) { | |
619 | if (!tls_setup_handshake(s)) { | |
620 | ossl_statem_set_error(s); | |
621 | return WRITE_TRAN_ERROR; | |
622 | } | |
623 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
624 | return WRITE_TRAN_CONTINUE; | |
625 | } | |
626 | st->hand_state = TLS_ST_OK; | |
627 | ossl_statem_set_in_init(s, 0); | |
628 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
629 | } |
630 | } | |
631 | ||
632 | /* | |
633 | * Perform any pre work that needs to be done prior to sending a message from | |
634 | * the client to the server. | |
635 | */ | |
8481f583 | 636 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 637 | { |
d6f1a6e9 | 638 | OSSL_STATEM *st = &s->statem; |
61ae935a | 639 | |
a230b26e | 640 | switch (st->hand_state) { |
f3b3d7f0 RS |
641 | default: |
642 | /* No pre work to be done */ | |
643 | break; | |
644 | ||
61ae935a MC |
645 | case TLS_ST_CW_CLNT_HELLO: |
646 | s->shutdown = 0; | |
647 | if (SSL_IS_DTLS(s)) { | |
648 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
649 | if (!ssl3_init_finished_mac(s)) { |
650 | ossl_statem_set_error(s); | |
651 | return WORK_ERROR; | |
652 | } | |
61ae935a MC |
653 | } |
654 | break; | |
655 | ||
61ae935a MC |
656 | case TLS_ST_CW_CHANGE: |
657 | if (SSL_IS_DTLS(s)) { | |
658 | if (s->hit) { | |
659 | /* | |
660 | * We're into the last flight so we don't retransmit these | |
661 | * messages unless we need to. | |
662 | */ | |
663 | st->use_timer = 0; | |
664 | } | |
665 | #ifndef OPENSSL_NO_SCTP | |
666 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
667 | return dtls_wait_for_dry(s); | |
668 | #endif | |
669 | } | |
f3b3d7f0 | 670 | break; |
61ae935a MC |
671 | |
672 | case TLS_ST_OK: | |
30f05b19 | 673 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
674 | } |
675 | ||
676 | return WORK_FINISHED_CONTINUE; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Perform any work that needs to be done after sending a message from the | |
681 | * client to the server. | |
682 | */ | |
8481f583 | 683 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 684 | { |
d6f1a6e9 | 685 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
686 | |
687 | s->init_num = 0; | |
688 | ||
a230b26e | 689 | switch (st->hand_state) { |
f3b3d7f0 RS |
690 | default: |
691 | /* No post work to be done */ | |
692 | break; | |
693 | ||
61ae935a | 694 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 695 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 696 | return WORK_MORE_A; |
46417569 | 697 | |
61ae935a MC |
698 | if (SSL_IS_DTLS(s)) { |
699 | /* Treat the next message as the first packet */ | |
700 | s->first_packet = 1; | |
701 | } | |
6cb42265 MC |
702 | |
703 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
704 | && s->max_early_data > 0) { | |
705 | /* | |
706 | * We haven't selected TLSv1.3 yet so we don't call the change | |
707 | * cipher state function associated with the SSL_METHOD. Instead | |
708 | * we call tls13_change_cipher_state() directly. | |
709 | */ | |
710 | if (!tls13_change_cipher_state(s, | |
711 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
1ea4d09a | 712 | return WORK_ERROR; |
6cb42265 | 713 | } |
61ae935a MC |
714 | break; |
715 | ||
716 | case TLS_ST_CW_KEY_EXCH: | |
717 | if (tls_client_key_exchange_post_work(s) == 0) | |
718 | return WORK_ERROR; | |
719 | break; | |
720 | ||
721 | case TLS_ST_CW_CHANGE: | |
722 | s->session->cipher = s->s3->tmp.new_cipher; | |
723 | #ifdef OPENSSL_NO_COMP | |
724 | s->session->compress_meth = 0; | |
725 | #else | |
726 | if (s->s3->tmp.new_compression == NULL) | |
727 | s->session->compress_meth = 0; | |
728 | else | |
729 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
730 | #endif | |
731 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
732 | return WORK_ERROR; | |
733 | ||
734 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
735 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
736 | return WORK_ERROR; | |
737 | ||
738 | if (SSL_IS_DTLS(s)) { | |
739 | #ifndef OPENSSL_NO_SCTP | |
740 | if (s->hit) { | |
741 | /* | |
742 | * Change to new shared key of SCTP-Auth, will be ignored if | |
743 | * no SCTP used. | |
744 | */ | |
745 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
746 | 0, NULL); | |
747 | } | |
748 | #endif | |
749 | ||
750 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
751 | } | |
752 | break; | |
753 | ||
754 | case TLS_ST_CW_FINISHED: | |
755 | #ifndef OPENSSL_NO_SCTP | |
756 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
757 | /* | |
758 | * Change to new shared key of SCTP-Auth, will be ignored if | |
759 | * no SCTP used. | |
760 | */ | |
761 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
762 | 0, NULL); | |
763 | } | |
764 | #endif | |
765 | if (statem_flush(s) != 1) | |
766 | return WORK_MORE_B; | |
92760c21 MC |
767 | |
768 | if (SSL_IS_TLS13(s)) { | |
769 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
770 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
771 | return WORK_ERROR; | |
772 | } | |
61ae935a | 773 | break; |
9412b3ad MC |
774 | |
775 | case TLS_ST_CW_KEY_UPDATE: | |
776 | if (statem_flush(s) != 1) | |
777 | return WORK_MORE_A; | |
57389a32 MC |
778 | if (!tls13_update_key(s, 1)) |
779 | return WORK_ERROR; | |
9412b3ad | 780 | break; |
61ae935a MC |
781 | } |
782 | ||
783 | return WORK_FINISHED_CONTINUE; | |
784 | } | |
785 | ||
786 | /* | |
6392fb8e MC |
787 | * Get the message construction function and message type for sending from the |
788 | * client | |
61ae935a MC |
789 | * |
790 | * Valid return values are: | |
791 | * 1: Success | |
792 | * 0: Error | |
793 | */ | |
6392fb8e | 794 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 795 | confunc_f *confunc, int *mt) |
61ae935a | 796 | { |
d6f1a6e9 | 797 | OSSL_STATEM *st = &s->statem; |
61ae935a | 798 | |
4a01c59f MC |
799 | switch (st->hand_state) { |
800 | default: | |
801 | /* Shouldn't happen */ | |
802 | return 0; | |
803 | ||
804 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 805 | if (SSL_IS_DTLS(s)) |
6392fb8e | 806 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 807 | else |
6392fb8e MC |
808 | *confunc = tls_construct_change_cipher_spec; |
809 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
810 | break; |
811 | ||
812 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
813 | *confunc = tls_construct_client_hello; |
814 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
815 | break; |
816 | ||
817 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
818 | *confunc = tls_construct_client_certificate; |
819 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
820 | break; |
821 | ||
822 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
823 | *confunc = tls_construct_client_key_exchange; |
824 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
825 | break; |
826 | ||
827 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 828 | *confunc = tls_construct_cert_verify; |
6392fb8e | 829 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 830 | break; |
61ae935a MC |
831 | |
832 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 833 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
834 | *confunc = tls_construct_next_proto; |
835 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 836 | break; |
61ae935a | 837 | #endif |
4a01c59f | 838 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
839 | *confunc = tls_construct_finished; |
840 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 841 | break; |
9412b3ad MC |
842 | |
843 | case TLS_ST_CW_KEY_UPDATE: | |
844 | *confunc = tls_construct_key_update; | |
845 | *mt = SSL3_MT_KEY_UPDATE; | |
846 | break; | |
4a01c59f | 847 | } |
5923ad4b | 848 | |
5923ad4b | 849 | return 1; |
61ae935a MC |
850 | } |
851 | ||
852 | /* | |
853 | * Returns the maximum allowed length for the current message that we are | |
854 | * reading. Excludes the message header. | |
855 | */ | |
eda75751 | 856 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 857 | { |
d6f1a6e9 | 858 | OSSL_STATEM *st = &s->statem; |
61ae935a | 859 | |
a230b26e | 860 | switch (st->hand_state) { |
f3b3d7f0 RS |
861 | default: |
862 | /* Shouldn't happen */ | |
863 | return 0; | |
864 | ||
a230b26e EK |
865 | case TLS_ST_CR_SRVR_HELLO: |
866 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 867 | |
a230b26e EK |
868 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
869 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 870 | |
3847d426 MC |
871 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
872 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
873 | ||
a230b26e EK |
874 | case TLS_ST_CR_CERT: |
875 | return s->max_cert_list; | |
61ae935a | 876 | |
2c5dfdc3 MC |
877 | case TLS_ST_CR_CERT_VRFY: |
878 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
879 | ||
a230b26e EK |
880 | case TLS_ST_CR_CERT_STATUS: |
881 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 882 | |
a230b26e EK |
883 | case TLS_ST_CR_KEY_EXCH: |
884 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 885 | |
a230b26e EK |
886 | case TLS_ST_CR_CERT_REQ: |
887 | /* | |
888 | * Set to s->max_cert_list for compatibility with previous releases. In | |
889 | * practice these messages can get quite long if servers are configured | |
890 | * to provide a long list of acceptable CAs | |
891 | */ | |
892 | return s->max_cert_list; | |
61ae935a | 893 | |
a230b26e EK |
894 | case TLS_ST_CR_SRVR_DONE: |
895 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 896 | |
a230b26e EK |
897 | case TLS_ST_CR_CHANGE: |
898 | if (s->version == DTLS1_BAD_VER) | |
899 | return 3; | |
900 | return CCS_MAX_LENGTH; | |
61ae935a | 901 | |
a230b26e EK |
902 | case TLS_ST_CR_SESSION_TICKET: |
903 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 904 | |
a230b26e EK |
905 | case TLS_ST_CR_FINISHED: |
906 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
907 | |
908 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
909 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
910 | |
911 | case TLS_ST_CR_KEY_UPDATE: | |
912 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 913 | } |
61ae935a MC |
914 | } |
915 | ||
916 | /* | |
917 | * Process a message that the client has been received from the server. | |
918 | */ | |
8481f583 | 919 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 920 | { |
d6f1a6e9 | 921 | OSSL_STATEM *st = &s->statem; |
61ae935a | 922 | |
a230b26e | 923 | switch (st->hand_state) { |
f3b3d7f0 RS |
924 | default: |
925 | /* Shouldn't happen */ | |
926 | return MSG_PROCESS_ERROR; | |
927 | ||
a230b26e EK |
928 | case TLS_ST_CR_SRVR_HELLO: |
929 | return tls_process_server_hello(s, pkt); | |
61ae935a | 930 | |
a230b26e EK |
931 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
932 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 933 | |
3847d426 MC |
934 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
935 | return tls_process_hello_retry_request(s, pkt); | |
936 | ||
a230b26e EK |
937 | case TLS_ST_CR_CERT: |
938 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 939 | |
2c5dfdc3 MC |
940 | case TLS_ST_CR_CERT_VRFY: |
941 | return tls_process_cert_verify(s, pkt); | |
942 | ||
a230b26e EK |
943 | case TLS_ST_CR_CERT_STATUS: |
944 | return tls_process_cert_status(s, pkt); | |
61ae935a | 945 | |
a230b26e EK |
946 | case TLS_ST_CR_KEY_EXCH: |
947 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 948 | |
a230b26e EK |
949 | case TLS_ST_CR_CERT_REQ: |
950 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 951 | |
a230b26e EK |
952 | case TLS_ST_CR_SRVR_DONE: |
953 | return tls_process_server_done(s, pkt); | |
61ae935a | 954 | |
a230b26e EK |
955 | case TLS_ST_CR_CHANGE: |
956 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 957 | |
a230b26e EK |
958 | case TLS_ST_CR_SESSION_TICKET: |
959 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 960 | |
a230b26e EK |
961 | case TLS_ST_CR_FINISHED: |
962 | return tls_process_finished(s, pkt); | |
e46f2334 | 963 | |
c7f47786 MC |
964 | case TLS_ST_CR_HELLO_REQ: |
965 | return tls_process_hello_req(s, pkt); | |
966 | ||
e46f2334 MC |
967 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
968 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
969 | |
970 | case TLS_ST_CR_KEY_UPDATE: | |
971 | return tls_process_key_update(s, pkt); | |
61ae935a | 972 | } |
61ae935a MC |
973 | } |
974 | ||
975 | /* | |
976 | * Perform any further processing required following the receipt of a message | |
977 | * from the server | |
978 | */ | |
8481f583 | 979 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 980 | { |
d6f1a6e9 | 981 | OSSL_STATEM *st = &s->statem; |
61ae935a | 982 | |
a230b26e | 983 | switch (st->hand_state) { |
f3b3d7f0 RS |
984 | default: |
985 | /* Shouldn't happen */ | |
986 | return WORK_ERROR; | |
987 | ||
05c4f1d5 MC |
988 | case TLS_ST_CR_CERT_REQ: |
989 | return tls_prepare_client_certificate(s, wst); | |
990 | ||
61ae935a MC |
991 | #ifndef OPENSSL_NO_SCTP |
992 | case TLS_ST_CR_SRVR_DONE: | |
993 | /* We only get here if we are using SCTP and we are renegotiating */ | |
994 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
995 | s->s3->in_read_app_data = 2; | |
996 | s->rwstate = SSL_READING; | |
997 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
998 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 999 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
1000 | return WORK_MORE_A; |
1001 | } | |
fe3a3291 | 1002 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
1003 | return WORK_FINISHED_STOP; |
1004 | #endif | |
61ae935a | 1005 | } |
61ae935a MC |
1006 | } |
1007 | ||
7cea05dc | 1008 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1009 | { |
2c7b4dbc | 1010 | unsigned char *p; |
ec60ccc1 MC |
1011 | size_t sess_id_len; |
1012 | int i, protverr; | |
2c7b4dbc | 1013 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 1014 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1015 | SSL_COMP *comp; |
1016 | #endif | |
b9908bf9 | 1017 | SSL_SESSION *sess = s->session; |
0f113f3e | 1018 | |
7cea05dc | 1019 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1020 | /* Should not happen */ |
1021 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1022 | return 0; |
2c7b4dbc | 1023 | } |
0f113f3e | 1024 | |
b9908bf9 | 1025 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1026 | protverr = ssl_set_client_hello_version(s); |
1027 | if (protverr != 0) { | |
1028 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1029 | return 0; |
4fa52141 | 1030 | } |
0f113f3e | 1031 | |
a230b26e | 1032 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 1033 | /* |
b9908bf9 MC |
1034 | * In the case of EAP-FAST, we can have a pre-shared |
1035 | * "ticket" without a session ID. | |
0f113f3e | 1036 | */ |
aff8c126 | 1037 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
1038 | (sess->not_resumable)) { |
1039 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1040 | return 0; |
b9908bf9 MC |
1041 | } |
1042 | /* else use the pre-loaded session */ | |
0f113f3e | 1043 | |
b9908bf9 | 1044 | p = s->s3->client_random; |
0f113f3e | 1045 | |
b9908bf9 MC |
1046 | /* |
1047 | * for DTLS if client_random is initialized, reuse it, we are | |
1048 | * required to use same upon reply to HelloVerify | |
1049 | */ | |
1050 | if (SSL_IS_DTLS(s)) { | |
1051 | size_t idx; | |
1052 | i = 1; | |
1053 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1054 | if (p[idx]) { | |
1055 | i = 0; | |
1056 | break; | |
0f113f3e | 1057 | } |
0f113f3e | 1058 | } |
b9908bf9 MC |
1059 | } else |
1060 | i = 1; | |
0f113f3e | 1061 | |
a230b26e | 1062 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1063 | return 0; |
b9908bf9 | 1064 | |
b9908bf9 MC |
1065 | /*- |
1066 | * version indicates the negotiated version: for example from | |
1067 | * an SSLv2/v3 compatible client hello). The client_version | |
1068 | * field is the maximum version we permit and it is also | |
1069 | * used in RSA encrypted premaster secrets. Some servers can | |
1070 | * choke if we initially report a higher version then | |
1071 | * renegotiate to a lower one in the premaster secret. This | |
1072 | * didn't happen with TLS 1.0 as most servers supported it | |
1073 | * but it can with TLS 1.1 or later if the server only supports | |
1074 | * 1.0. | |
1075 | * | |
1076 | * Possible scenario with previous logic: | |
1077 | * 1. Client hello indicates TLS 1.2 | |
1078 | * 2. Server hello says TLS 1.0 | |
1079 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1080 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1081 | * 5. Server sends hello request to renegotiate. |
1082 | * 6. Client hello indicates TLS v1.0 as we now | |
1083 | * know that is maximum server supports. | |
1084 | * 7. Server chokes on RSA encrypted premaster secret | |
1085 | * containing version 1.0. | |
1086 | * | |
1087 | * For interoperability it should be OK to always use the | |
1088 | * maximum version we support in client hello and then rely | |
1089 | * on the checking of version to ensure the servers isn't | |
1090 | * being inconsistent: for example initially negotiating with | |
1091 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1092 | * client_version in client hello and not resetting it to | |
1093 | * the negotiated version. | |
cd998837 MC |
1094 | * |
1095 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1096 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1097 | */ |
7acb8b64 | 1098 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1099 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1100 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1101 | return 0; |
2c7b4dbc | 1102 | } |
b9908bf9 MC |
1103 | |
1104 | /* Session ID */ | |
f05bcf0f | 1105 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1106 | sess_id_len = 0; |
b9908bf9 | 1107 | else |
ec60ccc1 MC |
1108 | sess_id_len = s->session->session_id_length; |
1109 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1110 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1111 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1112 | sess_id_len)) | |
7cea05dc | 1113 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1114 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1115 | return 0; |
b9908bf9 | 1116 | } |
0f113f3e | 1117 | |
b9908bf9 MC |
1118 | /* cookie stuff for DTLS */ |
1119 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1120 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1121 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1122 | s->d1->cookie_len)) { |
b9908bf9 | 1123 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1124 | return 0; |
0f113f3e | 1125 | } |
b9908bf9 MC |
1126 | } |
1127 | ||
1128 | /* Ciphers supported */ | |
7cea05dc | 1129 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1130 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1131 | return 0; |
2c7b4dbc MC |
1132 | } |
1133 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1134 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1135 | return 0; | |
1136 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1137 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1138 | return 0; |
b9908bf9 | 1139 | } |
0f113f3e | 1140 | |
b9908bf9 | 1141 | /* COMPRESSION */ |
7cea05dc | 1142 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1143 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1144 | return 0; |
2c7b4dbc MC |
1145 | } |
1146 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1147 | if (ssl_allow_compression(s) |
1148 | && s->ctx->comp_methods | |
1149 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1150 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1151 | for (i = 0; i < compnum; i++) { | |
1152 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1153 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1154 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1155 | return 0; |
2c7b4dbc MC |
1156 | } |
1157 | } | |
b9908bf9 | 1158 | } |
09b6c2ef | 1159 | #endif |
2c7b4dbc | 1160 | /* Add the NULL method */ |
7cea05dc | 1161 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1162 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1163 | return 0; |
2c7b4dbc | 1164 | } |
761772d7 | 1165 | |
b9908bf9 | 1166 | /* TLS extensions */ |
30aeba43 | 1167 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1168 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1169 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1170 | return 0; |
b9908bf9 | 1171 | } |
0f113f3e | 1172 | |
b9908bf9 | 1173 | return 1; |
0f113f3e | 1174 | } |
d02b48c6 | 1175 | |
be3583fa | 1176 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1177 | { |
1178 | int al; | |
cb150cbc | 1179 | size_t cookie_len; |
8ba708e5 MC |
1180 | PACKET cookiepkt; |
1181 | ||
1182 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1183 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1184 | al = SSL_AD_DECODE_ERROR; |
1185 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1186 | goto f_err; | |
1187 | } | |
1188 | ||
1189 | cookie_len = PACKET_remaining(&cookiepkt); | |
1190 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1191 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1192 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1193 | goto f_err; | |
1194 | } | |
1195 | ||
1196 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1197 | al = SSL_AD_DECODE_ERROR; | |
1198 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1199 | goto f_err; | |
1200 | } | |
1201 | s->d1->cookie_len = cookie_len; | |
1202 | ||
1203 | return MSG_PROCESS_FINISHED_READING; | |
1204 | f_err: | |
1205 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1206 | ossl_statem_set_error(s); |
8ba708e5 MC |
1207 | return MSG_PROCESS_ERROR; |
1208 | } | |
1209 | ||
be3583fa | 1210 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1211 | { |
1212 | STACK_OF(SSL_CIPHER) *sk; | |
1213 | const SSL_CIPHER *c; | |
332eb390 | 1214 | PACKET session_id, extpkt; |
b9908bf9 | 1215 | size_t session_id_len; |
b6981744 | 1216 | const unsigned char *cipherchars; |
b9908bf9 MC |
1217 | int i, al = SSL_AD_INTERNAL_ERROR; |
1218 | unsigned int compression; | |
4fa52141 | 1219 | unsigned int sversion; |
3434f40b | 1220 | unsigned int context; |
4fa52141 | 1221 | int protverr; |
332eb390 | 1222 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1223 | #ifndef OPENSSL_NO_COMP |
1224 | SSL_COMP *comp; | |
1225 | #endif | |
1226 | ||
4fa52141 VD |
1227 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1228 | al = SSL_AD_DECODE_ERROR; | |
1229 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1230 | goto f_err; | |
1231 | } | |
50932c4a | 1232 | |
4ff65f77 | 1233 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1234 | protverr = ssl_choose_client_version(s, sversion); |
1235 | if (protverr != 0) { | |
1236 | al = SSL_AD_PROTOCOL_VERSION; | |
1237 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1238 | goto f_err; | |
0f113f3e | 1239 | } |
0f113f3e MC |
1240 | |
1241 | /* load the server hello data */ | |
1242 | /* load the server random */ | |
73999b62 | 1243 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1244 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1245 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1246 | goto f_err; |
1247 | } | |
0f113f3e | 1248 | |
fc5ce51d | 1249 | /* Get the session-id. */ |
71728dd8 MC |
1250 | if (!SSL_IS_TLS13(s)) { |
1251 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1252 | al = SSL_AD_DECODE_ERROR; | |
1253 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1254 | goto f_err; | |
1255 | } | |
1256 | session_id_len = PACKET_remaining(&session_id); | |
1257 | if (session_id_len > sizeof s->session->session_id | |
1258 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1259 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1260 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1261 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1262 | goto f_err; | |
1263 | } | |
1264 | } else { | |
625b0d51 | 1265 | PACKET_null_init(&session_id); |
71728dd8 | 1266 | session_id_len = 0; |
0f113f3e | 1267 | } |
e481f9b9 | 1268 | |
73999b62 | 1269 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1270 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1271 | al = SSL_AD_DECODE_ERROR; |
1272 | goto f_err; | |
1273 | } | |
1274 | ||
4ff65f77 MC |
1275 | if (!SSL_IS_TLS13(s)) { |
1276 | if (!PACKET_get_1(pkt, &compression)) { | |
1277 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1278 | al = SSL_AD_DECODE_ERROR; | |
1279 | goto f_err; | |
1280 | } | |
1281 | } else { | |
1282 | compression = 0; | |
1283 | } | |
1284 | ||
1285 | /* TLS extensions */ | |
1286 | if (PACKET_remaining(pkt) == 0) { | |
1287 | PACKET_null_init(&extpkt); | |
1288 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1289 | al = SSL_AD_DECODE_ERROR; | |
1290 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1291 | goto f_err; | |
1292 | } | |
1293 | ||
1294 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1295 | : EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1296 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1297 | goto f_err; |
1298 | ||
1299 | s->hit = 0; | |
1300 | ||
1301 | if (SSL_IS_TLS13(s)) { | |
1302 | /* This will set s->hit if we are resuming */ | |
1303 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1304 | EXT_TLS1_3_SERVER_HELLO, | |
1305 | extensions, NULL, 0, &al)) | |
1306 | goto f_err; | |
1307 | } else { | |
8c1a5343 | 1308 | /* |
4ff65f77 MC |
1309 | * Check if we can resume the session based on external pre-shared |
1310 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1311 | * Resumption based on server-side state works with session IDs. | |
1312 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1313 | * works by overriding the SessionTicket extension at the application | |
1314 | * layer, and does not send a session ID. (We do not know whether | |
1315 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1316 | * ID alone is not a reliable indicator of session resumption, so we | |
1317 | * first check if we can resume, and later peek at the next handshake | |
1318 | * message to see if the server wants to resume. | |
8c1a5343 | 1319 | */ |
4ff65f77 MC |
1320 | if (s->version >= TLS1_VERSION |
1321 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1322 | const SSL_CIPHER *pref_cipher = NULL; | |
1323 | /* | |
1324 | * s->session->master_key_length is a size_t, but this is an int for | |
1325 | * backwards compat reasons | |
1326 | */ | |
1327 | int master_key_length; | |
1328 | master_key_length = sizeof(s->session->master_key); | |
1329 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1330 | &master_key_length, | |
1331 | NULL, &pref_cipher, | |
1332 | s->ext.session_secret_cb_arg) | |
1333 | && master_key_length > 0) { | |
1334 | s->session->master_key_length = master_key_length; | |
1335 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1336 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1337 | } else { |
1338 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1339 | al = SSL_AD_INTERNAL_ERROR; | |
1340 | goto f_err; | |
1341 | } | |
0f113f3e | 1342 | } |
4ff65f77 MC |
1343 | |
1344 | if (session_id_len != 0 | |
1345 | && session_id_len == s->session->session_id_length | |
1346 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1347 | session_id_len) == 0) | |
1348 | s->hit = 1; | |
50932c4a MC |
1349 | } |
1350 | ||
4ff65f77 | 1351 | if (s->hit) { |
0f113f3e | 1352 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1353 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1354 | /* actually a client application bug */ |
1355 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1356 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1357 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1358 | goto f_err; | |
1359 | } | |
6e3d0153 | 1360 | } else { |
0f113f3e | 1361 | /* |
6e3d0153 | 1362 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1363 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1364 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1365 | * so the PAC-based session secret is always preserved. It'll be | |
1366 | * overwritten if the server refuses resumption. | |
0f113f3e | 1367 | */ |
4ff65f77 MC |
1368 | if (s->session->session_id_length > 0 |
1369 | || (SSL_IS_TLS13(s) | |
1370 | && s->session->ext.tick_identity | |
1371 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1372 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1373 | if (!ssl_get_new_session(s, 0)) { |
1374 | goto f_err; | |
1375 | } | |
1376 | } | |
50932c4a | 1377 | |
ccae4a15 | 1378 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1379 | s->session->session_id_length = session_id_len; |
1380 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1381 | if (session_id_len > 0) |
1382 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1383 | session_id_len); | |
0f113f3e | 1384 | } |
fc5ce51d | 1385 | |
ccae4a15 FI |
1386 | /* Session version and negotiated protocol version should match */ |
1387 | if (s->version != s->session->ssl_version) { | |
1388 | al = SSL_AD_PROTOCOL_VERSION; | |
1389 | ||
1390 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1391 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1392 | goto f_err; | |
1393 | } | |
1394 | ||
60d685d1 | 1395 | c = ssl_get_cipher_by_char(s, cipherchars, 0); |
0f113f3e MC |
1396 | if (c == NULL) { |
1397 | /* unknown cipher */ | |
1398 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1399 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1400 | goto f_err; |
1401 | } | |
0f113f3e | 1402 | /* |
3eb2aff4 KR |
1403 | * Now that we know the version, update the check to see if it's an allowed |
1404 | * version. | |
1405 | */ | |
1406 | s->s3->tmp.min_ver = s->version; | |
1407 | s->s3->tmp.max_ver = s->version; | |
1408 | /* | |
1409 | * If it is a disabled cipher we either didn't send it in client hello, | |
1410 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1411 | */ |
1412 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1413 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1414 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1415 | goto f_err; |
1416 | } | |
0f113f3e MC |
1417 | |
1418 | sk = ssl_get_ciphers_by_id(s); | |
1419 | i = sk_SSL_CIPHER_find(sk, c); | |
1420 | if (i < 0) { | |
1421 | /* we did not say we would use this cipher */ | |
1422 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1423 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1424 | goto f_err; |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Depending on the session caching (internal/external), the cipher | |
1429 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1430 | * set and use it for comparison. | |
1431 | */ | |
1432 | if (s->session->cipher) | |
1433 | s->session->cipher_id = s->session->cipher->id; | |
1434 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1435 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1436 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1437 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1438 | goto f_err; | |
0f113f3e MC |
1439 | } |
1440 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1441 | |
09b6c2ef | 1442 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1443 | if (compression != 0) { |
0f113f3e | 1444 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1445 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1446 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1447 | goto f_err; | |
1448 | } | |
1449 | /* | |
1450 | * If compression is disabled we'd better not try to resume a session | |
1451 | * using compression. | |
1452 | */ | |
1453 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1454 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1455 | goto f_err; |
1456 | } | |
09b6c2ef | 1457 | #else |
fc5ce51d | 1458 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1459 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1460 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1461 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1462 | goto f_err; | |
1463 | } | |
fc5ce51d | 1464 | if (compression == 0) |
0f113f3e MC |
1465 | comp = NULL; |
1466 | else if (!ssl_allow_compression(s)) { | |
1467 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1468 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1469 | goto f_err; |
fc5ce51d EK |
1470 | } else { |
1471 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1472 | } | |
0f113f3e | 1473 | |
fc5ce51d | 1474 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1475 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1476 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1477 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1478 | goto f_err; | |
1479 | } else { | |
1480 | s->s3->tmp.new_compression = comp; | |
1481 | } | |
09b6c2ef | 1482 | #endif |
761772d7 | 1483 | |
4ff65f77 | 1484 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1485 | goto f_err; |
1486 | ||
8723588e MC |
1487 | #ifndef OPENSSL_NO_SCTP |
1488 | if (SSL_IS_DTLS(s) && s->hit) { | |
1489 | unsigned char sctpauthkey[64]; | |
1490 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1491 | ||
1492 | /* | |
1493 | * Add new shared key for SCTP-Auth, will be ignored if | |
1494 | * no SCTP used. | |
1495 | */ | |
141eb8c6 MC |
1496 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1497 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1498 | |
1499 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1500 | sizeof(sctpauthkey), |
1501 | labelbuffer, | |
1502 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1503 | goto f_err; |
8723588e MC |
1504 | |
1505 | BIO_ctrl(SSL_get_wbio(s), | |
1506 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1507 | sizeof(sctpauthkey), sctpauthkey); | |
1508 | } | |
1509 | #endif | |
1510 | ||
92760c21 MC |
1511 | /* |
1512 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1513 | * we're done with this message | |
1514 | */ | |
1515 | if (SSL_IS_TLS13(s) | |
1516 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1517 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1518 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1519 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1520 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1521 | al = SSL_AD_INTERNAL_ERROR; | |
1522 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1523 | goto f_err; | |
1524 | } | |
1525 | ||
1b0286a3 | 1526 | OPENSSL_free(extensions); |
b9908bf9 | 1527 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1528 | f_err: |
1529 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1530 | ossl_statem_set_error(s); |
1b0286a3 | 1531 | OPENSSL_free(extensions); |
b9908bf9 | 1532 | return MSG_PROCESS_ERROR; |
0f113f3e | 1533 | } |
d02b48c6 | 1534 | |
3847d426 MC |
1535 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1536 | { | |
1537 | unsigned int sversion; | |
2248dbeb | 1538 | int errorcode; |
3847d426 MC |
1539 | RAW_EXTENSION *extensions = NULL; |
1540 | int al; | |
1541 | PACKET extpkt; | |
1542 | ||
1543 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1544 | al = SSL_AD_DECODE_ERROR; | |
1545 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1546 | goto f_err; | |
1547 | } | |
1548 | ||
1549 | s->hello_retry_request = 1; | |
1550 | ||
1551 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1552 | errorcode = ssl_choose_client_version(s, sversion); |
1553 | if (errorcode != 0) { | |
3847d426 | 1554 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1555 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1556 | goto f_err; |
1557 | } | |
1558 | ||
1559 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1560 | al = SSL_AD_DECODE_ERROR; | |
1561 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1562 | goto f_err; | |
1563 | } | |
1564 | ||
1565 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
fc5ece2e | 1566 | &extensions, &al, NULL) |
3847d426 MC |
1567 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, |
1568 | extensions, NULL, 0, &al)) | |
1569 | goto f_err; | |
1570 | ||
1571 | OPENSSL_free(extensions); | |
1572 | ||
1573 | return MSG_PROCESS_FINISHED_READING; | |
1574 | f_err: | |
1575 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1576 | ossl_statem_set_error(s); | |
1577 | OPENSSL_free(extensions); | |
1578 | return MSG_PROCESS_ERROR; | |
1579 | } | |
1580 | ||
be3583fa | 1581 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1582 | { |
1583 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1584 | unsigned long cert_list_len, cert_len; | |
1585 | X509 *x = NULL; | |
b6981744 | 1586 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1587 | STACK_OF(X509) *sk = NULL; |
1588 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1589 | size_t chainidx; |
e96e0f8e | 1590 | unsigned int context = 0; |
0f113f3e MC |
1591 | |
1592 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1593 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1594 | goto err; |
0f113f3e MC |
1595 | } |
1596 | ||
e96e0f8e MC |
1597 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1598 | || context != 0 | |
1599 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1600 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1601 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1602 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1603 | goto f_err; |
1604 | } | |
d805a57b | 1605 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1606 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1607 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1608 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1609 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1610 | SSL_R_CERT_LENGTH_MISMATCH); |
1611 | goto f_err; | |
1612 | } | |
1613 | ||
df758a85 MC |
1614 | certstart = certbytes; |
1615 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1616 | if (x == NULL) { |
1617 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1618 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1619 | goto f_err; |
1620 | } | |
df758a85 | 1621 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1622 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1623 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1624 | SSL_R_CERT_LENGTH_MISMATCH); |
1625 | goto f_err; | |
1626 | } | |
e96e0f8e MC |
1627 | |
1628 | if (SSL_IS_TLS13(s)) { | |
1629 | RAW_EXTENSION *rawexts = NULL; | |
1630 | PACKET extensions; | |
1631 | ||
1632 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1633 | al = SSL_AD_DECODE_ERROR; | |
1634 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1635 | goto f_err; | |
1636 | } | |
1637 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
fc5ece2e | 1638 | &rawexts, &al, NULL) |
e96e0f8e | 1639 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, |
5ee289ea MC |
1640 | rawexts, x, chainidx, &al)) { |
1641 | OPENSSL_free(rawexts); | |
e96e0f8e | 1642 | goto f_err; |
5ee289ea MC |
1643 | } |
1644 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1645 | } |
1646 | ||
0f113f3e | 1647 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1648 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1649 | goto err; |
0f113f3e MC |
1650 | } |
1651 | x = NULL; | |
0f113f3e MC |
1652 | } |
1653 | ||
1654 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1655 | /* |
1656 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1657 | * for client side verification of the server certificate to take place. | |
1658 | * However, historically the code has only checked that *any* flag is set | |
1659 | * to cause server verification to take place. Use of the other flags makes | |
1660 | * no sense in client mode. An attempt to clean up the semantics was | |
1661 | * reverted because at least one application *only* set | |
1662 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1663 | * server verification to take place, after the clean up it silently did | |
1664 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1665 | * sent to them because they are void functions. Therefore, we now use the | |
1666 | * (less clean) historic behaviour of performing validation if any flag is | |
1667 | * set. The *documented* interface remains the same. | |
1668 | */ | |
1669 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1670 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1671 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1672 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1673 | goto f_err; | |
1674 | } | |
1675 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1676 | if (i > 1) { | |
b9908bf9 | 1677 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1678 | al = SSL_AD_HANDSHAKE_FAILURE; |
1679 | goto f_err; | |
1680 | } | |
1681 | ||
c34b0f99 | 1682 | s->session->peer_chain = sk; |
0f113f3e MC |
1683 | /* |
1684 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1685 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1686 | */ |
1687 | x = sk_X509_value(sk, 0); | |
1688 | sk = NULL; | |
1689 | /* | |
1690 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1691 | */ | |
1692 | ||
8382fd3a | 1693 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1694 | |
55a9a16f | 1695 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1696 | x = NULL; |
1697 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1698 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1699 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1700 | goto f_err; | |
1701 | } | |
1702 | ||
1703 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1704 | if (i < 0) { |
0f113f3e MC |
1705 | x = NULL; |
1706 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1707 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1708 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1709 | goto f_err; | |
1710 | } | |
05b8486e DSH |
1711 | /* |
1712 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1713 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1714 | * type. | |
1715 | */ | |
1716 | if (!SSL_IS_TLS13(s)) { | |
1717 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1718 | if (exp_idx >= 0 && i != exp_idx | |
1719 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1720 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1721 | && i != SSL_PKEY_GOST01))) { | |
1722 | x = NULL; | |
1723 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1724 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1725 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1726 | goto f_err; | |
1727 | } | |
0f113f3e | 1728 | } |
a273c6ee | 1729 | s->session->peer_type = i; |
55a9a16f MC |
1730 | |
1731 | X509_free(s->session->peer); | |
05f0fb9f | 1732 | X509_up_ref(x); |
55a9a16f | 1733 | s->session->peer = x; |
0f113f3e | 1734 | s->session->verify_result = s->verify_result; |
0f113f3e | 1735 | x = NULL; |
2c5dfdc3 MC |
1736 | |
1737 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1738 | if (SSL_IS_TLS13(s) | |
1739 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1740 | sizeof(s->cert_verify_hash), | |
1741 | &s->cert_verify_hash_len)) { | |
1742 | al = SSL_AD_INTERNAL_ERROR; | |
1743 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1744 | goto f_err; | |
1745 | } | |
1746 | ||
b9908bf9 | 1747 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1748 | goto done; |
1749 | ||
0f113f3e | 1750 | f_err: |
66696478 | 1751 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1752 | err: |
fe3a3291 | 1753 | ossl_statem_set_error(s); |
66696478 | 1754 | done: |
0f113f3e MC |
1755 | X509_free(x); |
1756 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1757 | return ret; |
0f113f3e | 1758 | } |
d02b48c6 | 1759 | |
7dc1c647 | 1760 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1761 | { |
1762 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1763 | PACKET psk_identity_hint; |
02a74590 | 1764 | |
7dc1c647 MC |
1765 | /* PSK ciphersuites are preceded by an identity hint */ |
1766 | ||
1767 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1768 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1769 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1770 | return 0; |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * Store PSK identity hint for later use, hint is used in | |
1775 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1776 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1777 | * identity. | |
1778 | */ | |
1779 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1780 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1781 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1782 | return 0; |
1783 | } | |
02a74590 | 1784 | |
7dc1c647 MC |
1785 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1786 | OPENSSL_free(s->session->psk_identity_hint); | |
1787 | s->session->psk_identity_hint = NULL; | |
1788 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1789 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1790 | *al = SSL_AD_INTERNAL_ERROR; |
1791 | return 0; | |
1792 | } | |
1793 | ||
1794 | return 1; | |
1795 | #else | |
4fa88861 | 1796 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1797 | *al = SSL_AD_INTERNAL_ERROR; |
1798 | return 0; | |
02a74590 MC |
1799 | #endif |
1800 | } | |
1801 | ||
25c6c10c MC |
1802 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1803 | { | |
1804 | #ifndef OPENSSL_NO_SRP | |
1805 | PACKET prime, generator, salt, server_pub; | |
1806 | ||
1807 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1808 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1809 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1810 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1811 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1812 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1813 | return 0; |
1814 | } | |
1815 | ||
348240c6 | 1816 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1817 | if ((s->srp_ctx.N = |
1818 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1819 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1820 | || (s->srp_ctx.g = |
1821 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1822 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1823 | || (s->srp_ctx.s = |
1824 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1825 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1826 | || (s->srp_ctx.B = |
1827 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1828 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1829 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1830 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1831 | return 0; |
1832 | } | |
1833 | ||
1834 | if (!srp_verify_server_param(s, al)) { | |
1835 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1836 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1837 | return 0; |
1838 | } | |
1839 | ||
1840 | /* We must check if there is a certificate */ | |
a230b26e | 1841 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1842 | *pkey = X509_get0_pubkey(s->session->peer); |
1843 | ||
1844 | return 1; | |
1845 | #else | |
4fa88861 | 1846 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1847 | *al = SSL_AD_INTERNAL_ERROR; |
1848 | return 0; | |
1849 | #endif | |
1850 | } | |
1851 | ||
e01a610d MC |
1852 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1853 | { | |
1854 | #ifndef OPENSSL_NO_DH | |
1855 | PACKET prime, generator, pub_key; | |
1856 | EVP_PKEY *peer_tmp = NULL; | |
1857 | ||
1858 | DH *dh = NULL; | |
1859 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1860 | ||
26505153 RL |
1861 | int check_bits = 0; |
1862 | ||
e01a610d MC |
1863 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1864 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1865 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1866 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1867 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1868 | return 0; |
1869 | } | |
1870 | ||
1871 | peer_tmp = EVP_PKEY_new(); | |
1872 | dh = DH_new(); | |
1873 | ||
1874 | if (peer_tmp == NULL || dh == NULL) { | |
1875 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1876 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1877 | goto err; |
1878 | } | |
1879 | ||
348240c6 MC |
1880 | /* TODO(size_t): Convert these calls */ |
1881 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1882 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1883 | NULL); | |
1884 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1885 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1886 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1887 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1888 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1889 | goto err; |
1890 | } | |
1891 | ||
26505153 RL |
1892 | /* test non-zero pupkey */ |
1893 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1894 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1895 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1896 | goto err; |
1897 | } | |
1898 | ||
1899 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1900 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1901 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1902 | goto err; |
1903 | } | |
1904 | p = g = NULL; | |
1905 | ||
26505153 RL |
1906 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1907 | *al = SSL_AD_DECODE_ERROR; | |
1908 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1909 | goto err; | |
1910 | } | |
1911 | ||
e01a610d MC |
1912 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1913 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1914 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1915 | goto err; |
1916 | } | |
1917 | bnpub_key = NULL; | |
1918 | ||
1919 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1920 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1921 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1922 | goto err; |
1923 | } | |
1924 | ||
1925 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1926 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1927 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1928 | goto err; |
1929 | } | |
1930 | ||
1931 | s->s3->peer_tmp = peer_tmp; | |
1932 | ||
1933 | /* | |
1934 | * FIXME: This makes assumptions about which ciphersuites come with | |
1935 | * public keys. We should have a less ad-hoc way of doing this | |
1936 | */ | |
a230b26e | 1937 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1938 | *pkey = X509_get0_pubkey(s->session->peer); |
1939 | /* else anonymous DH, so no certificate or pkey. */ | |
1940 | ||
1941 | return 1; | |
1942 | ||
1943 | err: | |
1944 | BN_free(p); | |
1945 | BN_free(g); | |
1946 | BN_free(bnpub_key); | |
1947 | DH_free(dh); | |
1948 | EVP_PKEY_free(peer_tmp); | |
1949 | ||
1950 | return 0; | |
1951 | #else | |
4fa88861 | 1952 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1953 | *al = SSL_AD_INTERNAL_ERROR; |
1954 | return 0; | |
1955 | #endif | |
1956 | } | |
1957 | ||
ff74aeb1 MC |
1958 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1959 | { | |
1960 | #ifndef OPENSSL_NO_EC | |
1961 | PACKET encoded_pt; | |
1962 | const unsigned char *ecparams; | |
1963 | int curve_nid; | |
ec24630a | 1964 | unsigned int curve_flags; |
ff74aeb1 MC |
1965 | EVP_PKEY_CTX *pctx = NULL; |
1966 | ||
1967 | /* | |
1968 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1969 | * public key. For now we only support named (not generic) curves and | |
1970 | * ECParameters in this case is just three bytes. | |
1971 | */ | |
1972 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1973 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1974 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1975 | return 0; |
1976 | } | |
1977 | /* | |
1978 | * Check curve is one of our preferences, if not server has sent an | |
1979 | * invalid curve. ECParameters is 3 bytes. | |
1980 | */ | |
1981 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1982 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1983 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1984 | return 0; |
1985 | } | |
1986 | ||
ec24630a DSH |
1987 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1988 | ||
a230b26e | 1989 | if (curve_nid == 0) { |
ff74aeb1 | 1990 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1991 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1992 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1993 | return 0; | |
1994 | } | |
1995 | ||
ec24630a DSH |
1996 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1997 | EVP_PKEY *key = EVP_PKEY_new(); | |
1998 | ||
1999 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
2000 | *al = SSL_AD_INTERNAL_ERROR; | |
2001 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2002 | EVP_PKEY_free(key); | |
2003 | return 0; | |
2004 | } | |
2005 | s->s3->peer_tmp = key; | |
2006 | } else { | |
2007 | /* Set up EVP_PKEY with named curve as parameters */ | |
2008 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
2009 | if (pctx == NULL | |
2010 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2011 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2012 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2013 | *al = SSL_AD_INTERNAL_ERROR; | |
2014 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2015 | EVP_PKEY_CTX_free(pctx); | |
2016 | return 0; | |
2017 | } | |
ff74aeb1 | 2018 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2019 | pctx = NULL; |
ff74aeb1 | 2020 | } |
ff74aeb1 MC |
2021 | |
2022 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2023 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2024 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2025 | return 0; |
2026 | } | |
2027 | ||
ec24630a DSH |
2028 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2029 | PACKET_data(&encoded_pt), | |
2030 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 2031 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 2032 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2033 | return 0; |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2038 | * ECParameters in the server key exchange message. We do support RSA | |
2039 | * and ECDSA. | |
2040 | */ | |
2041 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2042 | *pkey = X509_get0_pubkey(s->session->peer); | |
2043 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2044 | *pkey = X509_get0_pubkey(s->session->peer); | |
2045 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2046 | ||
2047 | return 1; | |
2048 | #else | |
4fa88861 | 2049 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2050 | *al = SSL_AD_INTERNAL_ERROR; |
2051 | return 0; | |
2052 | #endif | |
2053 | } | |
2054 | ||
be3583fa | 2055 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2056 | { |
5554facb | 2057 | int al = -1; |
e1e588ac | 2058 | long alg_k; |
b9908bf9 | 2059 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2060 | EVP_MD_CTX *md_ctx = NULL; |
2061 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2062 | PACKET save_param_start, signature; |
b9908bf9 | 2063 | |
b9908bf9 MC |
2064 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2065 | ||
73999b62 | 2066 | save_param_start = *pkt; |
8d92c1f8 | 2067 | |
3260adf1 | 2068 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2069 | EVP_PKEY_free(s->s3->peer_tmp); |
2070 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2071 | #endif |
d02b48c6 | 2072 | |
7689082b | 2073 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2074 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2075 | goto err; | |
7689082b DSH |
2076 | } |
2077 | ||
2078 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2079 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2080 | } else if (alg_k & SSL_kSRP) { |
2081 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2082 | goto err; |
e01a610d MC |
2083 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2084 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2085 | goto err; | |
ff74aeb1 MC |
2086 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2087 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2088 | goto err; | |
0f113f3e MC |
2089 | } else if (alg_k) { |
2090 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2091 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2092 | goto err; |
0f113f3e | 2093 | } |
0f113f3e | 2094 | |
0f113f3e MC |
2095 | /* if it was signed, check the signature */ |
2096 | if (pkey != NULL) { | |
32942870 | 2097 | PACKET params; |
be8dba2c MC |
2098 | int maxsig; |
2099 | const EVP_MD *md = NULL; | |
e1e588ac | 2100 | |
32942870 EK |
2101 | /* |
2102 | * |pkt| now points to the beginning of the signature, so the difference | |
2103 | * equals the length of the parameters. | |
2104 | */ | |
2105 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2106 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2107 | PACKET_remaining(pkt))) { |
32942870 | 2108 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2109 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2110 | goto err; |
32942870 EK |
2111 | } |
2112 | ||
0f113f3e | 2113 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2114 | unsigned int sigalg; |
0f113f3e | 2115 | int rv; |
703bcee0 MC |
2116 | |
2117 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2118 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2119 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2120 | goto err; |
0f113f3e | 2121 | } |
5554facb | 2122 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2123 | if (rv == -1) { |
2124 | al = SSL_AD_INTERNAL_ERROR; | |
2125 | goto err; | |
2126 | } else if (rv == 0) { | |
2127 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2128 | goto err; |
0f113f3e | 2129 | } |
a2f9200f | 2130 | #ifdef SSL_DEBUG |
0f113f3e MC |
2131 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2132 | #endif | |
f365a3e2 DSH |
2133 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2134 | al = SSL_AD_INTERNAL_ERROR; | |
2135 | goto err; | |
32942870 | 2136 | } |
0f113f3e | 2137 | |
f365a3e2 DSH |
2138 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2139 | ||
73999b62 MC |
2140 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2141 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2142 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2143 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2144 | goto err; |
0f113f3e | 2145 | } |
be8dba2c MC |
2146 | maxsig = EVP_PKEY_size(pkey); |
2147 | if (maxsig < 0) { | |
e1e588ac | 2148 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2149 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2150 | goto err; |
8098fc56 | 2151 | } |
0f113f3e MC |
2152 | |
2153 | /* | |
8098fc56 | 2154 | * Check signature length |
0f113f3e | 2155 | */ |
be8dba2c | 2156 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2157 | /* wrong packet length */ |
e1e588ac | 2158 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2159 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2160 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2161 | goto err; |
2162 | } | |
2163 | ||
2164 | md_ctx = EVP_MD_CTX_new(); | |
2165 | if (md_ctx == NULL) { | |
2166 | al = SSL_AD_INTERNAL_ERROR; | |
2167 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2168 | goto err; | |
0f113f3e | 2169 | } |
e1e588ac | 2170 | |
fe3066ee MC |
2171 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2172 | al = SSL_AD_INTERNAL_ERROR; | |
2173 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2174 | goto err; | |
2175 | } | |
5554facb | 2176 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2177 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2178 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2179 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2180 | al = SSL_AD_INTERNAL_ERROR; |
2181 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2182 | goto err; | |
2183 | } | |
2184 | } | |
2185 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2186 | SSL3_RANDOM_SIZE) <= 0 | |
2187 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2188 | SSL3_RANDOM_SIZE) <= 0 | |
2189 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2190 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2191 | al = SSL_AD_INTERNAL_ERROR; |
2192 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2193 | goto err; |
192e4bbb | 2194 | } |
fe3066ee MC |
2195 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2196 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2197 | /* bad signature */ |
2198 | al = SSL_AD_DECRYPT_ERROR; | |
2199 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2200 | goto err; |
0f113f3e | 2201 | } |
e1e588ac | 2202 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2203 | md_ctx = NULL; |
0f113f3e | 2204 | } else { |
7689082b | 2205 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2206 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2207 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2208 | /* Might be wrong key type, check it */ |
e1e588ac | 2209 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2210 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2211 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2212 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2213 | } else { |
2214 | al = SSL_AD_DECODE_ERROR; | |
2215 | } | |
0f113f3e MC |
2216 | goto err; |
2217 | } | |
2218 | /* still data left over */ | |
73999b62 | 2219 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2220 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2221 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2222 | goto err; |
0f113f3e MC |
2223 | } |
2224 | } | |
e1e588ac | 2225 | |
b9908bf9 | 2226 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2227 | err: |
7dc1c647 MC |
2228 | if (al != -1) |
2229 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2230 | ossl_statem_set_error(s); |
fe3066ee | 2231 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2232 | return MSG_PROCESS_ERROR; |
0f113f3e | 2233 | } |
d02b48c6 | 2234 | |
be3583fa | 2235 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2236 | { |
2237 | int ret = MSG_PROCESS_ERROR; | |
03f44b97 | 2238 | unsigned int i, name_len; |
b9908bf9 | 2239 | X509_NAME *xn = NULL; |
b6981744 | 2240 | const unsigned char *namestart, *namebytes; |
b9908bf9 | 2241 | STACK_OF(X509_NAME) *ca_sk = NULL; |
03f44b97 | 2242 | PACKET cadns; |
0f113f3e MC |
2243 | |
2244 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2245 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2246 | goto err; |
2247 | } | |
2248 | ||
03f44b97 DSH |
2249 | if (SSL_IS_TLS13(s)) { |
2250 | PACKET reqctx; | |
2251 | ||
2252 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2253 | OPENSSL_free(s->s3->tmp.ctype); | |
2254 | s->s3->tmp.ctype = NULL; | |
2255 | s->s3->tmp.ctype_len = 0; | |
2256 | /* TODO(TLS1.3) need to process request context, for now ignore */ | |
2257 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2258 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2259 | SSL_R_LENGTH_MISMATCH); | |
2260 | goto err; | |
2261 | } | |
2262 | } else { | |
2263 | PACKET ctypes; | |
75c13e78 | 2264 | |
03f44b97 DSH |
2265 | /* get the certificate types */ |
2266 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
2267 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2268 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2269 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2270 | goto err; |
03f44b97 DSH |
2271 | } |
2272 | ||
2273 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
2274 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); | |
2275 | goto err; | |
2276 | } | |
0f113f3e | 2277 | } |
ac112332 | 2278 | |
0f113f3e | 2279 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2280 | PACKET sigalgs; |
2281 | ||
2282 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2283 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2284 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2285 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2286 | goto err; |
2287 | } | |
ac112332 | 2288 | |
9195ddcd DSH |
2289 | /* Clear certificate validity flags */ |
2290 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 2291 | s->s3->tmp.valid_flags[i] = 0; |
703bcee0 | 2292 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2293 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2294 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2295 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2296 | goto err; | |
2297 | } | |
2298 | if (!tls1_process_sigalgs(s)) { | |
2299 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2300 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2301 | goto err; |
2302 | } | |
0f113f3e MC |
2303 | } |
2304 | ||
2305 | /* get the CA RDNs */ | |
03f44b97 | 2306 | if (!PACKET_get_length_prefixed_2(pkt, &cadns)) { |
0f113f3e | 2307 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2308 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2309 | goto err; |
2310 | } | |
2311 | ||
03f44b97 DSH |
2312 | while (PACKET_remaining(&cadns)) { |
2313 | if (!PACKET_get_net_2(&cadns, &name_len) | |
2314 | || !PACKET_get_bytes(&cadns, &namebytes, name_len)) { | |
0f113f3e | 2315 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2316 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2317 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2318 | goto err; |
2319 | } | |
2320 | ||
ac112332 | 2321 | namestart = namebytes; |
0f113f3e | 2322 | |
ac112332 MC |
2323 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2324 | name_len)) == NULL) { | |
3c33c6f6 | 2325 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2326 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2327 | goto err; |
0f113f3e MC |
2328 | } |
2329 | ||
ac112332 | 2330 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2331 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2332 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2333 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2334 | goto err; | |
2335 | } | |
2336 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2337 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2338 | goto err; |
2339 | } | |
6afef8b1 | 2340 | xn = NULL; |
0f113f3e | 2341 | } |
03f44b97 DSH |
2342 | /* TODO(TLS1.3) need to parse and process extensions, for now ignore */ |
2343 | if (SSL_IS_TLS13(s)) { | |
2344 | PACKET reqexts; | |
2345 | ||
2346 | if (!PACKET_get_length_prefixed_2(pkt, &reqexts)) { | |
2347 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2348 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2349 | SSL_R_EXT_LENGTH_MISMATCH); | |
2350 | goto err; | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | if (PACKET_remaining(pkt) != 0) { | |
2355 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2356 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2357 | goto err; | |
2358 | } | |
0f113f3e | 2359 | |
0f113f3e MC |
2360 | /* we should setup a certificate to return.... */ |
2361 | s->s3->tmp.cert_req = 1; | |
222561fe | 2362 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2363 | s->s3->tmp.ca_names = ca_sk; |
2364 | ca_sk = NULL; | |
2365 | ||
05c4f1d5 | 2366 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2367 | goto done; |
0f113f3e | 2368 | err: |
fe3a3291 | 2369 | ossl_statem_set_error(s); |
cc273a93 | 2370 | done: |
6afef8b1 | 2371 | X509_NAME_free(xn); |
222561fe | 2372 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2373 | return ret; |
0f113f3e MC |
2374 | } |
2375 | ||
2376 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2377 | { |
0f113f3e | 2378 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2379 | } |
dfeab068 | 2380 | |
be3583fa | 2381 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2382 | { |
6df55cac | 2383 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2384 | unsigned int ticklen; |
9ac6244b | 2385 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2386 | unsigned int sess_len; |
de1df7e9 | 2387 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2388 | |
73999b62 | 2389 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2390 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2391 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2392 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2393 | || (SSL_IS_TLS13(s) |
2394 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2395 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2396 | goto f_err; |
2397 | } | |
2398 | ||
de1df7e9 MC |
2399 | /* |
2400 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2401 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2402 | * be 0 here in that instance | |
2403 | */ | |
e711da71 | 2404 | if (ticklen == 0) |
c9de4a20 | 2405 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2406 | |
de1df7e9 | 2407 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2408 | if (s->session->session_id_length > 0) { |
2409 | int i = s->session_ctx->session_cache_mode; | |
2410 | SSL_SESSION *new_sess; | |
2411 | /* | |
2412 | * We reused an existing session, so we need to replace it with a new | |
2413 | * one | |
2414 | */ | |
2415 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2416 | /* | |
e4612d02 | 2417 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2418 | */ |
e4612d02 | 2419 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2420 | } |
2421 | ||
2422 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2423 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2424 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2425 | goto f_err; |
2426 | } | |
2427 | ||
2428 | SSL_SESSION_free(s->session); | |
2429 | s->session = new_sess; | |
2430 | } | |
2431 | ||
fc24f0bf MC |
2432 | /* |
2433 | * Technically the cast to long here is not guaranteed by the C standard - | |
2434 | * but we use it elsewhere, so this should be ok. | |
2435 | */ | |
2436 | s->session->time = (long)time(NULL); | |
2437 | ||
aff8c126 RS |
2438 | OPENSSL_free(s->session->ext.tick); |
2439 | s->session->ext.tick = NULL; | |
2440 | s->session->ext.ticklen = 0; | |
e711da71 | 2441 | |
aff8c126 RS |
2442 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2443 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2444 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2445 | goto err; |
2446 | } | |
aff8c126 | 2447 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2448 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2449 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2450 | goto f_err; |
2451 | } | |
e711da71 | 2452 | |
aff8c126 | 2453 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2454 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2455 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2456 | |
2457 | if (SSL_IS_TLS13(s)) { | |
2458 | PACKET extpkt; | |
2459 | ||
2460 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2461 | || !tls_collect_extensions(s, &extpkt, | |
2462 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
fc5ece2e | 2463 | &exts, &al, NULL) |
de1df7e9 MC |
2464 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, |
2465 | exts, NULL, 0, &al)) { | |
2466 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2467 | goto f_err; | |
2468 | } | |
2469 | } | |
2470 | ||
0f113f3e MC |
2471 | /* |
2472 | * There are two ways to detect a resumed ticket session. One is to set | |
2473 | * an appropriate session ID and then the server must return a match in | |
2474 | * ServerHello. This allows the normal client session ID matching to work | |
2475 | * and we know much earlier that the ticket has been accepted. The | |
2476 | * other way is to set zero length session ID when the ticket is | |
2477 | * presented and rely on the handshake to determine session resumption. | |
2478 | * We choose the former approach because this fits in with assumptions | |
2479 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2480 | * SHA256 is disabled) hash of the ticket. | |
2481 | */ | |
ec60ccc1 MC |
2482 | /* |
2483 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2484 | * but s->session->session_id_length is a size_t | |
2485 | */ | |
aff8c126 | 2486 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2487 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2488 | EVP_sha256(), NULL)) { |
2489 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2490 | goto err; | |
2491 | } | |
ec60ccc1 | 2492 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2493 | |
2494 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2495 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2496 | OPENSSL_free(exts); |
de1df7e9 MC |
2497 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2498 | return MSG_PROCESS_FINISHED_READING; | |
2499 | } | |
2500 | ||
b9908bf9 | 2501 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2502 | f_err: |
2503 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2504 | err: | |
fe3a3291 | 2505 | ossl_statem_set_error(s); |
33d93417 | 2506 | OPENSSL_free(exts); |
b9908bf9 | 2507 | return MSG_PROCESS_ERROR; |
0f113f3e | 2508 | } |
67c8e7f4 | 2509 | |
f63e4288 MC |
2510 | /* |
2511 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2512 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2513 | * |*al| is populated with a suitable alert code. | |
2514 | */ | |
2515 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2516 | { |
8b0e934a | 2517 | size_t resplen; |
b9908bf9 | 2518 | unsigned int type; |
b9908bf9 | 2519 | |
73999b62 | 2520 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2521 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2522 | *al = SSL_AD_DECODE_ERROR; |
2523 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2524 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2525 | return 0; | |
0f113f3e | 2526 | } |
56a26ce3 MC |
2527 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2528 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2529 | *al = SSL_AD_DECODE_ERROR; |
2530 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2531 | return 0; | |
0f113f3e | 2532 | } |
8cbfcc70 RS |
2533 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2534 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2535 | *al = SSL_AD_INTERNAL_ERROR; |
2536 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2537 | return 0; | |
0f113f3e | 2538 | } |
8cbfcc70 | 2539 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2540 | *al = SSL_AD_DECODE_ERROR; |
2541 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2542 | return 0; | |
ac63710a | 2543 | } |
8cbfcc70 | 2544 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2545 | |
2546 | return 1; | |
2547 | } | |
2faa1b48 | 2548 | |
f63e4288 MC |
2549 | |
2550 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2551 | { | |
2552 | int al; | |
2553 | ||
2554 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2555 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2556 | ossl_statem_set_error(s); | |
2557 | return MSG_PROCESS_ERROR; | |
2558 | } | |
2559 | ||
b9908bf9 | 2560 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2561 | } |
d02b48c6 | 2562 | |
7776a36c MC |
2563 | /* |
2564 | * Perform miscellaneous checks and processing after we have received the | |
2565 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2566 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2567 | * on failure. | |
7776a36c MC |
2568 | */ |
2569 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2570 | { |
a455d0f6 MC |
2571 | /* |
2572 | * at this point we check that we have the required stuff from | |
2573 | * the server | |
2574 | */ | |
2575 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2576 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2577 | return 0; | |
a455d0f6 MC |
2578 | } |
2579 | ||
bb1aaab4 | 2580 | /* |
aff8c126 RS |
2581 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2582 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2583 | * message, or NULL and -1 otherwise |
2584 | */ | |
aff8c126 RS |
2585 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2586 | && s->ctx->ext.status_cb != NULL) { | |
2587 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2588 | ||
bb1aaab4 | 2589 | if (ret == 0) { |
7776a36c MC |
2590 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2591 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2592 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2593 | return 0; |
bb1aaab4 MC |
2594 | } |
2595 | if (ret < 0) { | |
7776a36c MC |
2596 | *al = SSL_AD_INTERNAL_ERROR; |
2597 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2598 | ERR_R_MALLOC_FAILURE); | |
2599 | return 0; | |
bb1aaab4 MC |
2600 | } |
2601 | } | |
ed29e82a RP |
2602 | #ifndef OPENSSL_NO_CT |
2603 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2604 | /* Note we validate the SCTs whether or not we abort on error */ |
2605 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2606 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2607 | return 0; | |
ed29e82a RP |
2608 | } |
2609 | } | |
2610 | #endif | |
2611 | ||
7776a36c MC |
2612 | return 1; |
2613 | } | |
2614 | ||
2615 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2616 | { | |
2617 | int al = SSL_AD_INTERNAL_ERROR; | |
2618 | ||
2619 | if (PACKET_remaining(pkt) > 0) { | |
2620 | /* should contain no data */ | |
2621 | al = SSL_AD_DECODE_ERROR; | |
2622 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2623 | goto err; | |
2624 | } | |
2625 | #ifndef OPENSSL_NO_SRP | |
2626 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2627 | if (SRP_Calc_A_param(s) <= 0) { | |
2628 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2629 | goto err; | |
2630 | } | |
2631 | } | |
2632 | #endif | |
2633 | ||
2634 | /* | |
2635 | * Error queue messages are generated directly by this function | |
2636 | */ | |
2637 | if (!tls_process_initial_server_flight(s, &al)) | |
2638 | goto err; | |
2639 | ||
473483d4 MC |
2640 | #ifndef OPENSSL_NO_SCTP |
2641 | /* Only applies to renegotiation */ | |
2642 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2643 | && s->renegotiate != 0) |
473483d4 MC |
2644 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2645 | else | |
2646 | #endif | |
2647 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2648 | |
2649 | err: | |
2650 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2651 | ossl_statem_set_error(s); | |
2652 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2653 | } |
176f31dd | 2654 | |
f1ec23c0 | 2655 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2656 | { |
7689082b | 2657 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2658 | int ret = 0; |
2659 | /* | |
2660 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2661 | * \0-terminated identity. The last byte is for us for simulating | |
2662 | * strnlen. | |
2663 | */ | |
2664 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2665 | size_t identitylen = 0; | |
2666 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2667 | unsigned char *tmppsk = NULL; | |
2668 | char *tmpidentity = NULL; | |
2669 | size_t psklen = 0; | |
2670 | ||
2671 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2672 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2673 | *al = SSL_AD_INTERNAL_ERROR; |
2674 | goto err; | |
2675 | } | |
d02b48c6 | 2676 | |
13c0ec4a | 2677 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2678 | |
13c0ec4a MC |
2679 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2680 | identity, sizeof(identity) - 1, | |
2681 | psk, sizeof(psk)); | |
7689082b | 2682 | |
13c0ec4a | 2683 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2684 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2685 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2686 | goto err; | |
2687 | } else if (psklen == 0) { | |
05ec6a25 | 2688 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2689 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2690 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2691 | goto err; | |
2692 | } | |
7689082b | 2693 | |
13c0ec4a MC |
2694 | identitylen = strlen(identity); |
2695 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2696 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2697 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2698 | goto err; | |
2699 | } | |
7689082b | 2700 | |
13c0ec4a MC |
2701 | tmppsk = OPENSSL_memdup(psk, psklen); |
2702 | tmpidentity = OPENSSL_strdup(identity); | |
2703 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2704 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2705 | *al = SSL_AD_INTERNAL_ERROR; |
2706 | goto err; | |
2707 | } | |
7689082b | 2708 | |
13c0ec4a MC |
2709 | OPENSSL_free(s->s3->tmp.psk); |
2710 | s->s3->tmp.psk = tmppsk; | |
2711 | s->s3->tmp.psklen = psklen; | |
2712 | tmppsk = NULL; | |
2713 | OPENSSL_free(s->session->psk_identity); | |
2714 | s->session->psk_identity = tmpidentity; | |
2715 | tmpidentity = NULL; | |
f1ec23c0 | 2716 | |
b2b3024e | 2717 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2718 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2719 | *al = SSL_AD_INTERNAL_ERROR; | |
2720 | goto err; | |
2721 | } | |
7689082b | 2722 | |
13c0ec4a | 2723 | ret = 1; |
0bce0b02 | 2724 | |
13c0ec4a MC |
2725 | err: |
2726 | OPENSSL_cleanse(psk, psklen); | |
2727 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2728 | OPENSSL_clear_free(tmppsk, psklen); | |
2729 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2730 | |
13c0ec4a MC |
2731 | return ret; |
2732 | #else | |
05ec6a25 | 2733 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2734 | *al = SSL_AD_INTERNAL_ERROR; |
2735 | return 0; | |
b9908bf9 | 2736 | #endif |
13c0ec4a | 2737 | } |
b9908bf9 | 2738 | |
f1ec23c0 | 2739 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2740 | { |
bc36ee62 | 2741 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2742 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2743 | EVP_PKEY *pkey = NULL; |
2744 | EVP_PKEY_CTX *pctx = NULL; | |
2745 | size_t enclen; | |
2746 | unsigned char *pms = NULL; | |
2747 | size_t pmslen = 0; | |
b9908bf9 | 2748 | |
13c0ec4a MC |
2749 | if (s->session->peer == NULL) { |
2750 | /* | |
2751 | * We should always have a server certificate with SSL_kRSA. | |
2752 | */ | |
05ec6a25 | 2753 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2754 | return 0; |
2755 | } | |
0f113f3e | 2756 | |
13c0ec4a MC |
2757 | pkey = X509_get0_pubkey(s->session->peer); |
2758 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2759 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2760 | return 0; |
2761 | } | |
0f113f3e | 2762 | |
13c0ec4a MC |
2763 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2764 | pms = OPENSSL_malloc(pmslen); | |
2765 | if (pms == NULL) { | |
05ec6a25 | 2766 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2767 | *al = SSL_AD_INTERNAL_ERROR; |
2768 | return 0; | |
2769 | } | |
0bce0b02 | 2770 | |
13c0ec4a MC |
2771 | pms[0] = s->client_version >> 8; |
2772 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2773 | /* TODO(size_t): Convert this function */ |
2774 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2775 | goto err; |
2776 | } | |
0f113f3e | 2777 | |
13c0ec4a | 2778 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2779 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2780 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2781 | goto err; | |
2782 | } | |
13c0ec4a MC |
2783 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2784 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2785 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2786 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2787 | goto err; |
2788 | } | |
f1ec23c0 MC |
2789 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2790 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2791 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2792 | goto err; |
2793 | } | |
13c0ec4a MC |
2794 | EVP_PKEY_CTX_free(pctx); |
2795 | pctx = NULL; | |
0f113f3e | 2796 | |
13c0ec4a | 2797 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2798 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2799 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2800 | goto err; | |
b9908bf9 | 2801 | } |
13c0ec4a MC |
2802 | |
2803 | s->s3->tmp.pms = pms; | |
2804 | s->s3->tmp.pmslen = pmslen; | |
2805 | ||
2faa1b48 CB |
2806 | /* Log the premaster secret, if logging is enabled. */ |
2807 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2808 | goto err; | |
2809 | ||
13c0ec4a MC |
2810 | return 1; |
2811 | err: | |
2812 | OPENSSL_clear_free(pms, pmslen); | |
2813 | EVP_PKEY_CTX_free(pctx); | |
2814 | ||
2815 | return 0; | |
2816 | #else | |
05ec6a25 | 2817 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2818 | *al = SSL_AD_INTERNAL_ERROR; |
2819 | return 0; | |
f9b3bff6 | 2820 | #endif |
13c0ec4a MC |
2821 | } |
2822 | ||
f1ec23c0 | 2823 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2824 | { |
2825 | #ifndef OPENSSL_NO_DH | |
2826 | DH *dh_clnt = NULL; | |
2827 | const BIGNUM *pub_key; | |
2828 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2829 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2830 | |
2831 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2832 | if (skey == NULL) |
2833 | goto err; | |
2834 | ||
0a699a07 | 2835 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2836 | if (ckey == NULL) |
2837 | goto err; | |
2838 | ||
a8c1c704 MC |
2839 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2840 | ||
0f1e51ea | 2841 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2842 | goto err; |
a8c1c704 MC |
2843 | |
2844 | /* send off the data */ | |
2845 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2846 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2847 | goto err; |
2848 | ||
2849 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2850 | EVP_PKEY_free(ckey); |
2851 | ||
2852 | return 1; | |
f1ec23c0 MC |
2853 | err: |
2854 | EVP_PKEY_free(ckey); | |
2855 | #endif | |
05ec6a25 | 2856 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2857 | *al = SSL_AD_INTERNAL_ERROR; |
2858 | return 0; | |
a8c1c704 MC |
2859 | } |
2860 | ||
f1ec23c0 | 2861 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2862 | { |
2863 | #ifndef OPENSSL_NO_EC | |
2864 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2865 | size_t encoded_pt_len = 0; |
67ad5aab | 2866 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2867 | int ret = 0; |
67ad5aab MC |
2868 | |
2869 | skey = s->s3->peer_tmp; | |
ec24630a | 2870 | if (skey == NULL) { |
05ec6a25 | 2871 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2872 | return 0; |
2873 | } | |
2874 | ||
0a699a07 | 2875 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2876 | if (ckey == NULL) { |
2877 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2878 | goto err; | |
2879 | } | |
67ad5aab | 2880 | |
0f1e51ea | 2881 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2882 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2883 | goto err; |
2884 | } | |
2885 | ||
2886 | /* Generate encoding of client key */ | |
ec24630a | 2887 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2888 | |
2889 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2890 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2891 | goto err; |
2892 | } | |
2893 | ||
b2b3024e | 2894 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2895 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2896 | goto err; | |
2897 | } | |
67ad5aab | 2898 | |
f1ec23c0 | 2899 | ret = 1; |
67ad5aab | 2900 | err: |
f1ec23c0 | 2901 | OPENSSL_free(encodedPoint); |
67ad5aab | 2902 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2903 | return ret; |
67ad5aab | 2904 | #else |
05ec6a25 | 2905 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2906 | *al = SSL_AD_INTERNAL_ERROR; |
2907 | return 0; | |
2908 | #endif | |
2909 | } | |
2910 | ||
f1ec23c0 | 2911 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2912 | { |
2913 | #ifndef OPENSSL_NO_GOST | |
2914 | /* GOST key exchange message creation */ | |
2915 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2916 | X509 *peer_cert; | |
2917 | size_t msglen; | |
2918 | unsigned int md_len; | |
2919 | unsigned char shared_ukm[32], tmp[256]; | |
2920 | EVP_MD_CTX *ukm_hash = NULL; | |
2921 | int dgst_nid = NID_id_GostR3411_94; | |
2922 | unsigned char *pms = NULL; | |
2923 | size_t pmslen = 0; | |
2924 | ||
2925 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2926 | dgst_nid = NID_id_GostR3411_2012_256; | |
2927 | ||
2928 | /* | |
2929 | * Get server sertificate PKEY and create ctx from it | |
2930 | */ | |
2931 | peer_cert = s->session->peer; | |
2932 | if (!peer_cert) { | |
2933 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2934 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2935 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2936 | return 0; | |
2937 | } | |
2938 | ||
2939 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2940 | if (pkey_ctx == NULL) { | |
2941 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2942 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2943 | return 0; |
2944 | } | |
2945 | /* | |
2946 | * If we have send a certificate, and certificate key | |
2947 | * parameters match those of server certificate, use | |
2948 | * certificate key for key exchange | |
2949 | */ | |
2950 | ||
2951 | /* Otherwise, generate ephemeral key pair */ | |
2952 | pmslen = 32; | |
2953 | pms = OPENSSL_malloc(pmslen); | |
2954 | if (pms == NULL) { | |
2955 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2956 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2957 | goto err; |
e00e0b3d MC |
2958 | } |
2959 | ||
2960 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2961 | /* Generate session key |
2962 | * TODO(size_t): Convert this function | |
2963 | */ | |
2964 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2965 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2966 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2967 | goto err; |
2968 | }; | |
e00e0b3d MC |
2969 | /* |
2970 | * Compute shared IV and store it in algorithm-specific context | |
2971 | * data | |
2972 | */ | |
2973 | ukm_hash = EVP_MD_CTX_new(); | |
2974 | if (ukm_hash == NULL | |
a230b26e EK |
2975 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2976 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2977 | SSL3_RANDOM_SIZE) <= 0 | |
2978 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2979 | SSL3_RANDOM_SIZE) <= 0 | |
2980 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2981 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2982 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2983 | goto err; |
2984 | } | |
2985 | EVP_MD_CTX_free(ukm_hash); | |
2986 | ukm_hash = NULL; | |
2987 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2988 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2989 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2990 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2991 | goto err; |
2992 | } | |
2993 | /* Make GOST keytransport blob message */ | |
2994 | /* | |
2995 | * Encapsulate it into sequence | |
2996 | */ | |
e00e0b3d MC |
2997 | msglen = 255; |
2998 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2999 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3000 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3001 | goto err; |
3002 | } | |
f1ec23c0 | 3003 | |
08029dfa MC |
3004 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3005 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3006 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3007 | *al = SSL_AD_INTERNAL_ERROR; |
3008 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3009 | goto err; | |
e00e0b3d | 3010 | } |
f1ec23c0 | 3011 | |
e00e0b3d MC |
3012 | EVP_PKEY_CTX_free(pkey_ctx); |
3013 | s->s3->tmp.pms = pms; | |
3014 | s->s3->tmp.pmslen = pmslen; | |
3015 | ||
3016 | return 1; | |
3017 | err: | |
3018 | EVP_PKEY_CTX_free(pkey_ctx); | |
3019 | OPENSSL_clear_free(pms, pmslen); | |
3020 | EVP_MD_CTX_free(ukm_hash); | |
3021 | return 0; | |
3022 | #else | |
05ec6a25 | 3023 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3024 | *al = SSL_AD_INTERNAL_ERROR; |
3025 | return 0; | |
3026 | #endif | |
3027 | } | |
3028 | ||
f1ec23c0 | 3029 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3030 | { |
8b9546c7 | 3031 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3032 | unsigned char *abytes = NULL; |
3033 | ||
3034 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3035 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3036 | &abytes)) { | |
05ec6a25 | 3037 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3038 | return 0; |
3039 | } | |
f1ec23c0 MC |
3040 | BN_bn2bin(s->srp_ctx.A, abytes); |
3041 | ||
840a2bf8 MC |
3042 | OPENSSL_free(s->session->srp_username); |
3043 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3044 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3045 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3046 | return 0; |
3047 | } | |
3048 | ||
3049 | return 1; | |
3050 | #else | |
05ec6a25 | 3051 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3052 | *al = SSL_AD_INTERNAL_ERROR; |
3053 | return 0; | |
3054 | #endif | |
3055 | } | |
3056 | ||
7cea05dc | 3057 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3058 | { |
13c0ec4a MC |
3059 | unsigned long alg_k; |
3060 | int al = -1; | |
3061 | ||
f1ec23c0 | 3062 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3063 | |
13c0ec4a | 3064 | if ((alg_k & SSL_PSK) |
7cea05dc | 3065 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3066 | goto err; |
3067 | ||
f1ec23c0 | 3068 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3069 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3070 | goto err; |
a8c1c704 | 3071 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3072 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3073 | goto err; |
67ad5aab | 3074 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3075 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3076 | goto err; |
e00e0b3d | 3077 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3078 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3079 | goto err; |
840a2bf8 | 3080 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3081 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3082 | goto err; |
4a424545 | 3083 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3084 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3085 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3086 | goto err; | |
3087 | } | |
3088 | ||
b9908bf9 | 3089 | return 1; |
0f113f3e | 3090 | err: |
13c0ec4a MC |
3091 | if (al != -1) |
3092 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3093 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3094 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3095 | #ifndef OPENSSL_NO_PSK |
3096 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3097 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3098 | #endif |
b9908bf9 MC |
3099 | return 0; |
3100 | } | |
3101 | ||
3102 | int tls_client_key_exchange_post_work(SSL *s) | |
3103 | { | |
3104 | unsigned char *pms = NULL; | |
3105 | size_t pmslen = 0; | |
3106 | ||
6f137370 MC |
3107 | pms = s->s3->tmp.pms; |
3108 | pmslen = s->s3->tmp.pmslen; | |
3109 | ||
b9908bf9 MC |
3110 | #ifndef OPENSSL_NO_SRP |
3111 | /* Check for SRP */ | |
3112 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3113 | if (!srp_generate_client_master_secret(s)) { | |
3114 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3115 | ERR_R_INTERNAL_ERROR); | |
3116 | goto err; | |
3117 | } | |
3118 | return 1; | |
3119 | } | |
3120 | #endif | |
b9908bf9 MC |
3121 | |
3122 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3123 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3124 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3125 | goto err; | |
3126 | } | |
3127 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3128 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3129 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3130 | /* ssl_generate_master_secret frees the pms even on error */ |
3131 | pms = NULL; | |
3132 | pmslen = 0; | |
b9908bf9 MC |
3133 | goto err; |
3134 | } | |
6f137370 MC |
3135 | pms = NULL; |
3136 | pmslen = 0; | |
473483d4 MC |
3137 | |
3138 | #ifndef OPENSSL_NO_SCTP | |
3139 | if (SSL_IS_DTLS(s)) { | |
3140 | unsigned char sctpauthkey[64]; | |
3141 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3142 | ||
3143 | /* | |
3144 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3145 | * used. | |
3146 | */ | |
141eb8c6 MC |
3147 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3148 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3149 | |
3150 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3151 | sizeof(sctpauthkey), labelbuffer, |
3152 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3153 | goto err; |
3154 | ||
3155 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3156 | sizeof(sctpauthkey), sctpauthkey); | |
3157 | } | |
3158 | #endif | |
3159 | ||
b9908bf9 MC |
3160 | return 1; |
3161 | err: | |
3162 | OPENSSL_clear_free(pms, pmslen); | |
3163 | s->s3->tmp.pms = NULL; | |
3164 | return 0; | |
0f113f3e | 3165 | } |
d02b48c6 | 3166 | |
0f113f3e MC |
3167 | /* |
3168 | * Check a certificate can be used for client authentication. Currently check | |
3169 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3170 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3171 | */ |
3172 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3173 | { |
0f113f3e | 3174 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3175 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3176 | return 0; |
3177 | /* | |
3178 | * If strict mode check suitability of chain before using it. This also | |
3179 | * adjusts suite B digest if necessary. | |
3180 | */ | |
3181 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3182 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3183 | return 0; | |
0f113f3e MC |
3184 | return 1; |
3185 | } | |
0d609395 | 3186 | |
be3583fa | 3187 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3188 | { |
3189 | X509 *x509 = NULL; | |
3190 | EVP_PKEY *pkey = NULL; | |
3191 | int i; | |
3192 | ||
b9908bf9 | 3193 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3194 | /* Let cert callback update client certificates if required */ |
3195 | if (s->cert->cert_cb) { | |
3196 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3197 | if (i < 0) { | |
3198 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3199 | return WORK_MORE_A; |
0f113f3e MC |
3200 | } |
3201 | if (i == 0) { | |
3202 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3203 | ossl_statem_set_error(s); |
0f113f3e MC |
3204 | return 0; |
3205 | } | |
3206 | s->rwstate = SSL_NOTHING; | |
3207 | } | |
3208 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3209 | return WORK_FINISHED_CONTINUE; |
3210 | ||
3211 | /* Fall through to WORK_MORE_B */ | |
3212 | wst = WORK_MORE_B; | |
0f113f3e MC |
3213 | } |
3214 | ||
3215 | /* We need to get a client cert */ | |
b9908bf9 | 3216 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3217 | /* |
3218 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3219 | * return(-1); We then get retied later | |
3220 | */ | |
0f113f3e MC |
3221 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3222 | if (i < 0) { | |
3223 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3224 | return WORK_MORE_B; |
0f113f3e MC |
3225 | } |
3226 | s->rwstate = SSL_NOTHING; | |
3227 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3228 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3229 | i = 0; | |
3230 | } else if (i == 1) { | |
3231 | i = 0; | |
b9908bf9 | 3232 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3233 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3234 | } | |
3235 | ||
222561fe | 3236 | X509_free(x509); |
25aaa98a | 3237 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3238 | if (i && !ssl3_check_client_certificate(s)) |
3239 | i = 0; | |
3240 | if (i == 0) { | |
3241 | if (s->version == SSL3_VERSION) { | |
3242 | s->s3->tmp.cert_req = 0; | |
3243 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3244 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3245 | } else { |
3246 | s->s3->tmp.cert_req = 2; | |
124037fd | 3247 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3248 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3249 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3250 | return 0; |
3251 | } | |
0f113f3e MC |
3252 | } |
3253 | } | |
3254 | ||
b9908bf9 | 3255 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3256 | } |
3257 | ||
b9908bf9 MC |
3258 | /* Shouldn't ever get here */ |
3259 | return WORK_ERROR; | |
3260 | } | |
3261 | ||
7cea05dc | 3262 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3263 | { |
0baed5e9 | 3264 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3265 | |
3266 | /* | |
3267 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3268 | * later | |
3269 | */ | |
3270 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3271 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3272 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3273 | : s->cert->key, |
3274 | &al)) { | |
b9908bf9 | 3275 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3276 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3277 | return 0; |
0f113f3e | 3278 | } |
b9908bf9 MC |
3279 | |
3280 | return 1; | |
0f113f3e MC |
3281 | } |
3282 | ||
3283 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3284 | |
36d16f8e | 3285 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3286 | { |
60f43e9e RL |
3287 | int i; |
3288 | #ifndef OPENSSL_NO_EC | |
3289 | int idx; | |
3290 | #endif | |
0f113f3e MC |
3291 | long alg_k, alg_a; |
3292 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3293 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3294 | |
0f113f3e MC |
3295 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3296 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3297 | |
0f113f3e | 3298 | /* we don't have a certificate */ |
55a9a16f | 3299 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3300 | return (1); |
d02b48c6 | 3301 | |
0f113f3e | 3302 | /* This is the passed certificate */ |
d02b48c6 | 3303 | |
10bf4fc2 | 3304 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3305 | idx = s->session->peer_type; |
0f113f3e | 3306 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3307 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3308 | /* check failed */ |
3309 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3310 | goto f_err; | |
3311 | } else { | |
3312 | return 1; | |
3313 | } | |
3314 | } else if (alg_a & SSL_aECDSA) { | |
3315 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3316 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3317 | goto f_err; | |
0f113f3e MC |
3318 | } |
3319 | #endif | |
8382fd3a | 3320 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3321 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3322 | |
3323 | /* Check that we have a certificate if we require one */ | |
3324 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3325 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3326 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3327 | goto f_err; | |
3328 | } | |
bc36ee62 | 3329 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3330 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3331 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3332 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3333 | goto f_err; | |
3334 | } | |
d02b48c6 | 3335 | #endif |
bc36ee62 | 3336 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3337 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3338 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3339 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3340 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3341 | goto f_err; | |
0f113f3e | 3342 | } |
79df9d62 | 3343 | #endif |
bc36ee62 | 3344 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3345 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3346 | al = SSL_AD_INTERNAL_ERROR; |
3347 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3348 | goto f_err; |
0f113f3e | 3349 | } |
d02b48c6 RE |
3350 | #endif |
3351 | ||
0f113f3e MC |
3352 | return (1); |
3353 | f_err: | |
26c79d56 | 3354 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3355 | return (0); |
3356 | } | |
3357 | ||
e481f9b9 | 3358 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3359 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3360 | { |
15e6be6c MC |
3361 | size_t len, padding_len; |
3362 | unsigned char *padding = NULL; | |
15e6be6c | 3363 | |
aff8c126 | 3364 | len = s->ext.npn_len; |
b9908bf9 | 3365 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3366 | |
aff8c126 | 3367 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3368 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3369 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3370 | goto err; | |
3371 | } | |
3372 | ||
3373 | memset(padding, 0, padding_len); | |
3374 | ||
b9908bf9 | 3375 | return 1; |
15e6be6c | 3376 | err: |
15e6be6c MC |
3377 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3378 | return 0; | |
b9908bf9 | 3379 | } |
6434abbf | 3380 | #endif |
368888bc | 3381 | |
c7f47786 MC |
3382 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3383 | { | |
3384 | if (PACKET_remaining(pkt) > 0) { | |
3385 | /* should contain no data */ | |
3386 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3387 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3388 | ossl_statem_set_error(s); | |
3389 | return MSG_PROCESS_ERROR; | |
3390 | } | |
3391 | ||
3392 | /* | |
1f04f23e MC |
3393 | * This is a historical discrepancy (not in the RFC) maintained for |
3394 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3395 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3396 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3397 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3398 | */ |
3399 | if (SSL_IS_DTLS(s)) | |
3400 | SSL_renegotiate(s); | |
3401 | else | |
3402 | SSL_renegotiate_abbreviated(s); | |
3403 | ||
3404 | return MSG_PROCESS_FINISHED_READING; | |
3405 | } | |
3406 | ||
e46f2334 MC |
3407 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3408 | { | |
3409 | int al = SSL_AD_INTERNAL_ERROR; | |
3410 | PACKET extensions; | |
3434f40b | 3411 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3412 | |
e46f2334 MC |
3413 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3414 | al = SSL_AD_DECODE_ERROR; | |
3415 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3416 | goto err; | |
3417 | } | |
3418 | ||
e96e0f8e | 3419 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
fc5ece2e | 3420 | &rawexts, &al, NULL) |
e96e0f8e | 3421 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3422 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3423 | goto err; |
3424 | ||
1b0286a3 | 3425 | OPENSSL_free(rawexts); |
e46f2334 MC |
3426 | return MSG_PROCESS_CONTINUE_READING; |
3427 | ||
3428 | err: | |
3429 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3430 | ossl_statem_set_error(s); | |
1b0286a3 | 3431 | OPENSSL_free(rawexts); |
e46f2334 MC |
3432 | return MSG_PROCESS_ERROR; |
3433 | } | |
3434 | ||
368888bc | 3435 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3436 | { |
3437 | int i = 0; | |
368888bc | 3438 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3439 | if (s->ctx->client_cert_engine) { |
3440 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3441 | SSL_get_client_CA_list(s), | |
3442 | px509, ppkey, NULL, NULL, NULL); | |
3443 | if (i != 0) | |
3444 | return i; | |
3445 | } | |
3446 | #endif | |
3447 | if (s->ctx->client_cert_cb) | |
3448 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3449 | return i; | |
3450 | } | |
d45ba43d | 3451 | |
ae2f7b37 | 3452 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3453 | { |
2c7b4dbc MC |
3454 | int i; |
3455 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3456 | int empty_reneg_info_scsv = !s->renegotiate; |
3457 | /* Set disabled masks for this session */ | |
3458 | ssl_set_client_disabled(s); | |
3459 | ||
3460 | if (sk == NULL) | |
3461 | return (0); | |
d45ba43d | 3462 | |
2c7b4dbc MC |
3463 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3464 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3465 | # error Max cipher length too short | |
3466 | # endif | |
3467 | /* | |
3468 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3469 | * chop number of supported ciphers to keep it well below this if we | |
3470 | * use TLS v1.2 | |
3471 | */ | |
3472 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3473 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3474 | else | |
3475 | #endif | |
3476 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3477 | maxlen = 0xfffe; | |
3478 | ||
3479 | if (empty_reneg_info_scsv) | |
3480 | maxlen -= 2; | |
3481 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3482 | maxlen -= 2; | |
3483 | ||
3484 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3485 | const SSL_CIPHER *c; | |
3486 | ||
d45ba43d MC |
3487 | c = sk_SSL_CIPHER_value(sk, i); |
3488 | /* Skip disabled ciphers */ | |
3489 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3490 | continue; | |
2c7b4dbc MC |
3491 | |
3492 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3493 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3494 | return 0; | |
3495 | } | |
3496 | ||
3497 | totlen += len; | |
d45ba43d | 3498 | } |
2c7b4dbc MC |
3499 | |
3500 | if (totlen == 0) { | |
3501 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3502 | return 0; | |
3503 | } | |
3504 | ||
3505 | if (totlen != 0) { | |
d45ba43d MC |
3506 | if (empty_reneg_info_scsv) { |
3507 | static SSL_CIPHER scsv = { | |
3508 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3509 | }; | |
2c7b4dbc MC |
3510 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3511 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3512 | return 0; | |
3513 | } | |
d45ba43d MC |
3514 | } |
3515 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3516 | static SSL_CIPHER scsv = { | |
3517 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3518 | }; | |
2c7b4dbc MC |
3519 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3520 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3521 | return 0; | |
3522 | } | |
d45ba43d MC |
3523 | } |
3524 | } | |
3525 | ||
2c7b4dbc | 3526 | return 1; |
d45ba43d | 3527 | } |