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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
8c74b5e5 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 8 | */ |
846e33c7 | 9 | |
ea262260 BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
12 | * | |
0f113f3e | 13 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
15 | * | |
16 | * The Contribution is licensed pursuant to the OpenSSL open source | |
17 | * license provided above. | |
18 | * | |
ea262260 BM |
19 | * ECC cipher suite support in OpenSSL originally written by |
20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
21 | * | |
22 | */ | |
ddac1974 NL |
23 | /* ==================================================================== |
24 | * Copyright 2005 Nokia. All rights reserved. | |
25 | * | |
26 | * The portions of the attached software ("Contribution") is developed by | |
27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
28 | * license. | |
29 | * | |
30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
32 | * support (see RFC 4279) to OpenSSL. | |
33 | * | |
34 | * No patent licenses or other rights except those expressly stated in | |
35 | * the OpenSSL open source license shall be deemed granted or received | |
36 | * expressly, by implication, estoppel, or otherwise. | |
37 | * | |
38 | * No assurances are provided by Nokia that the Contribution does not | |
39 | * infringe the patent or other intellectual property rights of any third | |
40 | * party or that the license provides you with all the necessary rights | |
41 | * to make use of the Contribution. | |
42 | * | |
43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
47 | * OTHERWISE. | |
48 | */ | |
d02b48c6 RE |
49 | |
50 | #include <stdio.h> | |
fc24f0bf | 51 | #include <time.h> |
8ba708e5 | 52 | #include "../ssl_locl.h" |
61ae935a | 53 | #include "statem_locl.h" |
ec577822 BM |
54 | #include <openssl/buffer.h> |
55 | #include <openssl/rand.h> | |
56 | #include <openssl/objects.h> | |
57 | #include <openssl/evp.h> | |
dbad1690 | 58 | #include <openssl/md5.h> |
3c27208f | 59 | #include <openssl/dh.h> |
d095b68d | 60 | #include <openssl/bn.h> |
3c27208f | 61 | #include <openssl/engine.h> |
f9b3bff6 | 62 | |
3847d426 | 63 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
64 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
65 | ||
7ab09630 | 66 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 67 | static int key_exchange_expected(SSL *s); |
0f113f3e | 68 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 69 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 70 | WPACKET *pkt); |
ea262260 | 71 | |
61ae935a MC |
72 | /* |
73 | * Is a CertificateRequest message allowed at the moment or not? | |
74 | * | |
75 | * Return values are: | |
76 | * 1: Yes | |
77 | * 0: No | |
78 | */ | |
7ab09630 | 79 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
80 | { |
81 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 82 | if ((s->version > SSL3_VERSION |
a230b26e EK |
83 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
84 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
85 | return 0; |
86 | ||
87 | return 1; | |
88 | } | |
89 | ||
90 | /* | |
a455d0f6 | 91 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
92 | * |
93 | * Return values are: | |
94 | * 1: Yes | |
95 | * 0: No | |
96 | */ | |
a455d0f6 | 97 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
98 | { |
99 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
100 | ||
101 | /* | |
102 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 103 | * ciphersuite or for SRP |
61ae935a | 104 | */ |
a455d0f6 MC |
105 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
106 | | SSL_kSRP)) { | |
107 | return 1; | |
61ae935a MC |
108 | } |
109 | ||
a455d0f6 | 110 | return 0; |
61ae935a MC |
111 | } |
112 | ||
0f1e51ea MC |
113 | /* |
114 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
115 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
116 | * server. The message type that the server has sent is provided in |mt|. The | |
117 | * current state is in |s->statem.hand_state|. | |
118 | * | |
94ed2c67 MC |
119 | * Return values are 1 for success (transition allowed) and 0 on error |
120 | * (transition not allowed) | |
0f1e51ea MC |
121 | */ |
122 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
123 | { | |
124 | OSSL_STATEM *st = &s->statem; | |
125 | ||
94ed2c67 MC |
126 | /* |
127 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
128 | * we will update this to look more like real TLSv1.3 | |
129 | */ | |
130 | ||
0f1e51ea MC |
131 | /* |
132 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
133 | * yet negotiated TLSv1.3 at that point so that is handled by | |
134 | * ossl_statem_client_read_transition() | |
135 | */ | |
136 | ||
137 | switch (st->hand_state) { | |
138 | default: | |
139 | break; | |
140 | ||
3847d426 MC |
141 | case TLS_ST_CW_CLNT_HELLO: |
142 | /* | |
143 | * This must a ClientHello following a HelloRetryRequest, so the only | |
144 | * thing we can get now is a ServerHello. | |
145 | */ | |
146 | if (mt == SSL3_MT_SERVER_HELLO) { | |
147 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
148 | return 1; | |
149 | } | |
150 | break; | |
151 | ||
0f1e51ea | 152 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
153 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
154 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
155 | return 1; | |
156 | } | |
157 | break; | |
158 | ||
159 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 160 | if (s->hit) { |
92760c21 MC |
161 | if (mt == SSL3_MT_FINISHED) { |
162 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
163 | return 1; |
164 | } | |
165 | } else { | |
92760c21 MC |
166 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
167 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
168 | return 1; | |
f5ca0b04 MC |
169 | } |
170 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
171 | st->hand_state = TLS_ST_CR_CERT; |
172 | return 1; | |
173 | } | |
174 | } | |
175 | break; | |
176 | ||
92760c21 MC |
177 | case TLS_ST_CR_CERT_REQ: |
178 | if (mt == SSL3_MT_CERTIFICATE) { | |
179 | st->hand_state = TLS_ST_CR_CERT; | |
180 | return 1; | |
181 | } | |
182 | break; | |
183 | ||
0f1e51ea | 184 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
185 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
186 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
187 | return 1; | |
188 | } | |
189 | break; | |
190 | ||
191 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
192 | if (mt == SSL3_MT_FINISHED) { |
193 | st->hand_state = TLS_ST_CR_FINISHED; | |
194 | return 1; | |
195 | } | |
196 | break; | |
cc2455bf MC |
197 | |
198 | case TLS_ST_OK: | |
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: | |
385 | if (mt == SSL3_MT_HELLO_REQUEST) { | |
386 | st->hand_state = TLS_ST_CR_HELLO_REQ; | |
387 | return 1; | |
388 | } | |
389 | break; | |
61ae935a MC |
390 | } |
391 | ||
672f3337 | 392 | err: |
61ae935a | 393 | /* No valid transition found */ |
672f3337 | 394 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 395 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
396 | return 0; |
397 | } | |
398 | ||
399 | /* | |
0f1e51ea MC |
400 | * ossl_statem_client13_write_transition() works out what handshake state to |
401 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
402 | * server. | |
0f1e51ea MC |
403 | */ |
404 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
405 | { | |
406 | OSSL_STATEM *st = &s->statem; | |
407 | ||
408 | /* | |
3847d426 MC |
409 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
410 | * TLSv1.3 yet at that point. They are handled by | |
411 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
412 | */ |
413 | switch (st->hand_state) { | |
414 | default: | |
415 | /* Shouldn't happen */ | |
416 | return WRITE_TRAN_ERROR; | |
417 | ||
3847d426 MC |
418 | case TLS_ST_CW_CLNT_HELLO: |
419 | /* We only hit this in the case of HelloRetryRequest */ | |
420 | return WRITE_TRAN_FINISHED; | |
421 | ||
422 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
423 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
424 | return WRITE_TRAN_CONTINUE; | |
425 | ||
92760c21 | 426 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 427 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 428 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
429 | return WRITE_TRAN_CONTINUE; |
430 | ||
431 | case TLS_ST_CW_CERT: | |
432 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 433 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 434 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
435 | return WRITE_TRAN_CONTINUE; |
436 | ||
437 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
438 | st->hand_state = TLS_ST_CW_FINISHED; |
439 | return WRITE_TRAN_CONTINUE; | |
440 | ||
e1c3de44 | 441 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
442 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
443 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
444 | return WRITE_TRAN_CONTINUE; | |
445 | } | |
446 | /* Fall through */ | |
447 | ||
9412b3ad | 448 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 449 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 450 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
451 | st->hand_state = TLS_ST_OK; |
452 | ossl_statem_set_in_init(s, 0); | |
453 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
454 | |
455 | case TLS_ST_OK: | |
9412b3ad 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 | ||
461 | /* Try to read from the server instead */ | |
cc2455bf | 462 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
463 | } |
464 | } | |
465 | ||
466 | /* | |
467 | * ossl_statem_client_write_transition() works out what handshake state to | |
468 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 469 | */ |
8481f583 | 470 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 471 | { |
d6f1a6e9 | 472 | OSSL_STATEM *st = &s->statem; |
61ae935a | 473 | |
0f1e51ea MC |
474 | /* |
475 | * Note that immediately before/after a ClientHello we don't know what | |
476 | * version we are going to negotiate yet, so we don't take this branch until | |
477 | * later | |
478 | */ | |
f5ca0b04 | 479 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
480 | return ossl_statem_client13_write_transition(s); |
481 | ||
a230b26e | 482 | switch (st->hand_state) { |
f3b3d7f0 RS |
483 | default: |
484 | /* Shouldn't happen */ | |
485 | return WRITE_TRAN_ERROR; | |
486 | ||
a230b26e | 487 | case TLS_ST_OK: |
c7f47786 MC |
488 | if (!s->renegotiate) { |
489 | /* | |
490 | * We haven't requested a renegotiation ourselves so we must have | |
491 | * received a message from the server. Better read it. | |
492 | */ | |
493 | return WRITE_TRAN_FINISHED; | |
494 | } | |
a230b26e EK |
495 | /* Renegotiation - fall through */ |
496 | case TLS_ST_BEFORE: | |
497 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
498 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 499 | |
a230b26e EK |
500 | case TLS_ST_CW_CLNT_HELLO: |
501 | /* | |
502 | * No transition at the end of writing because we don't know what | |
503 | * we will be sent | |
504 | */ | |
505 | return WRITE_TRAN_FINISHED; | |
61ae935a | 506 | |
a230b26e EK |
507 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
508 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
509 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 510 | |
a230b26e EK |
511 | case TLS_ST_CR_SRVR_DONE: |
512 | if (s->s3->tmp.cert_req) | |
513 | st->hand_state = TLS_ST_CW_CERT; | |
514 | else | |
61ae935a | 515 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 516 | return WRITE_TRAN_CONTINUE; |
61ae935a | 517 | |
a230b26e EK |
518 | case TLS_ST_CW_CERT: |
519 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
520 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 521 | |
a230b26e EK |
522 | case TLS_ST_CW_KEY_EXCH: |
523 | /* | |
524 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
525 | * sent, but no verify packet is sent | |
526 | */ | |
527 | /* | |
528 | * XXX: For now, we do not support client authentication in ECDH | |
529 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
530 | * need to skip the certificate verify message when client's | |
531 | * ECDH public key is sent inside the client certificate. | |
532 | */ | |
533 | if (s->s3->tmp.cert_req == 1) { | |
534 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
535 | } else { | |
61ae935a | 536 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
537 | } |
538 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
539 | st->hand_state = TLS_ST_CW_CHANGE; | |
540 | } | |
541 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 542 | |
a230b26e EK |
543 | case TLS_ST_CW_CERT_VRFY: |
544 | st->hand_state = TLS_ST_CW_CHANGE; | |
545 | return WRITE_TRAN_CONTINUE; | |
546 | ||
547 | case TLS_ST_CW_CHANGE: | |
61ae935a | 548 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 549 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 550 | #else |
aff8c126 | 551 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
552 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
553 | else | |
554 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 555 | #endif |
a230b26e | 556 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
557 | |
558 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
559 | case TLS_ST_CW_NEXT_PROTO: |
560 | st->hand_state = TLS_ST_CW_FINISHED; | |
561 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
562 | #endif |
563 | ||
a230b26e EK |
564 | case TLS_ST_CW_FINISHED: |
565 | if (s->hit) { | |
566 | st->hand_state = TLS_ST_OK; | |
567 | ossl_statem_set_in_init(s, 0); | |
568 | return WRITE_TRAN_CONTINUE; | |
569 | } else { | |
570 | return WRITE_TRAN_FINISHED; | |
571 | } | |
61ae935a | 572 | |
a230b26e EK |
573 | case TLS_ST_CR_FINISHED: |
574 | if (s->hit) { | |
575 | st->hand_state = TLS_ST_CW_CHANGE; | |
576 | return WRITE_TRAN_CONTINUE; | |
577 | } else { | |
578 | st->hand_state = TLS_ST_OK; | |
579 | ossl_statem_set_in_init(s, 0); | |
580 | return WRITE_TRAN_CONTINUE; | |
581 | } | |
c7f47786 MC |
582 | |
583 | case TLS_ST_CR_HELLO_REQ: | |
584 | /* | |
585 | * If we can renegotiate now then do so, otherwise wait for a more | |
586 | * convenient time. | |
587 | */ | |
588 | if (ssl3_renegotiate_check(s, 1)) { | |
589 | if (!tls_setup_handshake(s)) { | |
590 | ossl_statem_set_error(s); | |
591 | return WRITE_TRAN_ERROR; | |
592 | } | |
593 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
594 | return WRITE_TRAN_CONTINUE; | |
595 | } | |
596 | st->hand_state = TLS_ST_OK; | |
597 | ossl_statem_set_in_init(s, 0); | |
598 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
599 | } |
600 | } | |
601 | ||
602 | /* | |
603 | * Perform any pre work that needs to be done prior to sending a message from | |
604 | * the client to the server. | |
605 | */ | |
8481f583 | 606 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 607 | { |
d6f1a6e9 | 608 | OSSL_STATEM *st = &s->statem; |
61ae935a | 609 | |
a230b26e | 610 | switch (st->hand_state) { |
f3b3d7f0 RS |
611 | default: |
612 | /* No pre work to be done */ | |
613 | break; | |
614 | ||
61ae935a MC |
615 | case TLS_ST_CW_CLNT_HELLO: |
616 | s->shutdown = 0; | |
617 | if (SSL_IS_DTLS(s)) { | |
618 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
619 | if (!ssl3_init_finished_mac(s)) { |
620 | ossl_statem_set_error(s); | |
621 | return WORK_ERROR; | |
622 | } | |
61ae935a MC |
623 | } |
624 | break; | |
625 | ||
61ae935a MC |
626 | case TLS_ST_CW_CHANGE: |
627 | if (SSL_IS_DTLS(s)) { | |
628 | if (s->hit) { | |
629 | /* | |
630 | * We're into the last flight so we don't retransmit these | |
631 | * messages unless we need to. | |
632 | */ | |
633 | st->use_timer = 0; | |
634 | } | |
635 | #ifndef OPENSSL_NO_SCTP | |
636 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
637 | return dtls_wait_for_dry(s); | |
638 | #endif | |
639 | } | |
f3b3d7f0 | 640 | break; |
61ae935a MC |
641 | |
642 | case TLS_ST_OK: | |
30f05b19 | 643 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
644 | } |
645 | ||
646 | return WORK_FINISHED_CONTINUE; | |
647 | } | |
648 | ||
649 | /* | |
650 | * Perform any work that needs to be done after sending a message from the | |
651 | * client to the server. | |
652 | */ | |
8481f583 | 653 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 654 | { |
d6f1a6e9 | 655 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
656 | |
657 | s->init_num = 0; | |
658 | ||
a230b26e | 659 | switch (st->hand_state) { |
f3b3d7f0 RS |
660 | default: |
661 | /* No post work to be done */ | |
662 | break; | |
663 | ||
61ae935a | 664 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 665 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 666 | return WORK_MORE_A; |
46417569 | 667 | |
61ae935a MC |
668 | if (SSL_IS_DTLS(s)) { |
669 | /* Treat the next message as the first packet */ | |
670 | s->first_packet = 1; | |
671 | } | |
672 | break; | |
673 | ||
674 | case TLS_ST_CW_KEY_EXCH: | |
675 | if (tls_client_key_exchange_post_work(s) == 0) | |
676 | return WORK_ERROR; | |
677 | break; | |
678 | ||
679 | case TLS_ST_CW_CHANGE: | |
680 | s->session->cipher = s->s3->tmp.new_cipher; | |
681 | #ifdef OPENSSL_NO_COMP | |
682 | s->session->compress_meth = 0; | |
683 | #else | |
684 | if (s->s3->tmp.new_compression == NULL) | |
685 | s->session->compress_meth = 0; | |
686 | else | |
687 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
688 | #endif | |
689 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
690 | return WORK_ERROR; | |
691 | ||
692 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
693 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
694 | return WORK_ERROR; | |
695 | ||
696 | if (SSL_IS_DTLS(s)) { | |
697 | #ifndef OPENSSL_NO_SCTP | |
698 | if (s->hit) { | |
699 | /* | |
700 | * Change to new shared key of SCTP-Auth, will be ignored if | |
701 | * no SCTP used. | |
702 | */ | |
703 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
704 | 0, NULL); | |
705 | } | |
706 | #endif | |
707 | ||
708 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
709 | } | |
710 | break; | |
711 | ||
712 | case TLS_ST_CW_FINISHED: | |
713 | #ifndef OPENSSL_NO_SCTP | |
714 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
715 | /* | |
716 | * Change to new shared key of SCTP-Auth, will be ignored if | |
717 | * no SCTP used. | |
718 | */ | |
719 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
720 | 0, NULL); | |
721 | } | |
722 | #endif | |
723 | if (statem_flush(s) != 1) | |
724 | return WORK_MORE_B; | |
92760c21 MC |
725 | |
726 | if (SSL_IS_TLS13(s)) { | |
727 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
728 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
729 | return WORK_ERROR; | |
730 | } | |
61ae935a | 731 | break; |
9412b3ad MC |
732 | |
733 | case TLS_ST_CW_KEY_UPDATE: | |
734 | if (statem_flush(s) != 1) | |
735 | return WORK_MORE_A; | |
57389a32 MC |
736 | if (!tls13_update_key(s, 1)) |
737 | return WORK_ERROR; | |
9412b3ad | 738 | break; |
61ae935a MC |
739 | } |
740 | ||
741 | return WORK_FINISHED_CONTINUE; | |
742 | } | |
743 | ||
744 | /* | |
6392fb8e MC |
745 | * Get the message construction function and message type for sending from the |
746 | * client | |
61ae935a MC |
747 | * |
748 | * Valid return values are: | |
749 | * 1: Success | |
750 | * 0: Error | |
751 | */ | |
6392fb8e | 752 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 753 | confunc_f *confunc, int *mt) |
61ae935a | 754 | { |
d6f1a6e9 | 755 | OSSL_STATEM *st = &s->statem; |
61ae935a | 756 | |
4a01c59f MC |
757 | switch (st->hand_state) { |
758 | default: | |
759 | /* Shouldn't happen */ | |
760 | return 0; | |
761 | ||
762 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 763 | if (SSL_IS_DTLS(s)) |
6392fb8e | 764 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 765 | else |
6392fb8e MC |
766 | *confunc = tls_construct_change_cipher_spec; |
767 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
768 | break; |
769 | ||
770 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
771 | *confunc = tls_construct_client_hello; |
772 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
773 | break; |
774 | ||
775 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
776 | *confunc = tls_construct_client_certificate; |
777 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
778 | break; |
779 | ||
780 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
781 | *confunc = tls_construct_client_key_exchange; |
782 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
783 | break; |
784 | ||
785 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 786 | *confunc = tls_construct_cert_verify; |
6392fb8e | 787 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 788 | break; |
61ae935a MC |
789 | |
790 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 791 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
792 | *confunc = tls_construct_next_proto; |
793 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 794 | break; |
61ae935a | 795 | #endif |
4a01c59f | 796 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
797 | *confunc = tls_construct_finished; |
798 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 799 | break; |
9412b3ad MC |
800 | |
801 | case TLS_ST_CW_KEY_UPDATE: | |
802 | *confunc = tls_construct_key_update; | |
803 | *mt = SSL3_MT_KEY_UPDATE; | |
804 | break; | |
4a01c59f | 805 | } |
5923ad4b | 806 | |
5923ad4b | 807 | return 1; |
61ae935a MC |
808 | } |
809 | ||
810 | /* | |
811 | * Returns the maximum allowed length for the current message that we are | |
812 | * reading. Excludes the message header. | |
813 | */ | |
eda75751 | 814 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 815 | { |
d6f1a6e9 | 816 | OSSL_STATEM *st = &s->statem; |
61ae935a | 817 | |
a230b26e | 818 | switch (st->hand_state) { |
f3b3d7f0 RS |
819 | default: |
820 | /* Shouldn't happen */ | |
821 | return 0; | |
822 | ||
a230b26e EK |
823 | case TLS_ST_CR_SRVR_HELLO: |
824 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 825 | |
a230b26e EK |
826 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
827 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 828 | |
3847d426 MC |
829 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
830 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
831 | ||
a230b26e EK |
832 | case TLS_ST_CR_CERT: |
833 | return s->max_cert_list; | |
61ae935a | 834 | |
2c5dfdc3 MC |
835 | case TLS_ST_CR_CERT_VRFY: |
836 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
837 | ||
a230b26e EK |
838 | case TLS_ST_CR_CERT_STATUS: |
839 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 840 | |
a230b26e EK |
841 | case TLS_ST_CR_KEY_EXCH: |
842 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 843 | |
a230b26e EK |
844 | case TLS_ST_CR_CERT_REQ: |
845 | /* | |
846 | * Set to s->max_cert_list for compatibility with previous releases. In | |
847 | * practice these messages can get quite long if servers are configured | |
848 | * to provide a long list of acceptable CAs | |
849 | */ | |
850 | return s->max_cert_list; | |
61ae935a | 851 | |
a230b26e EK |
852 | case TLS_ST_CR_SRVR_DONE: |
853 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 854 | |
a230b26e EK |
855 | case TLS_ST_CR_CHANGE: |
856 | if (s->version == DTLS1_BAD_VER) | |
857 | return 3; | |
858 | return CCS_MAX_LENGTH; | |
61ae935a | 859 | |
a230b26e EK |
860 | case TLS_ST_CR_SESSION_TICKET: |
861 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 862 | |
a230b26e EK |
863 | case TLS_ST_CR_FINISHED: |
864 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
865 | |
866 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
867 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
868 | |
869 | case TLS_ST_CR_KEY_UPDATE: | |
870 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 871 | } |
61ae935a MC |
872 | } |
873 | ||
874 | /* | |
875 | * Process a message that the client has been received from the server. | |
876 | */ | |
8481f583 | 877 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 878 | { |
d6f1a6e9 | 879 | OSSL_STATEM *st = &s->statem; |
61ae935a | 880 | |
a230b26e | 881 | switch (st->hand_state) { |
f3b3d7f0 RS |
882 | default: |
883 | /* Shouldn't happen */ | |
884 | return MSG_PROCESS_ERROR; | |
885 | ||
a230b26e EK |
886 | case TLS_ST_CR_SRVR_HELLO: |
887 | return tls_process_server_hello(s, pkt); | |
61ae935a | 888 | |
a230b26e EK |
889 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
890 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 891 | |
3847d426 MC |
892 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
893 | return tls_process_hello_retry_request(s, pkt); | |
894 | ||
a230b26e EK |
895 | case TLS_ST_CR_CERT: |
896 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 897 | |
2c5dfdc3 MC |
898 | case TLS_ST_CR_CERT_VRFY: |
899 | return tls_process_cert_verify(s, pkt); | |
900 | ||
a230b26e EK |
901 | case TLS_ST_CR_CERT_STATUS: |
902 | return tls_process_cert_status(s, pkt); | |
61ae935a | 903 | |
a230b26e EK |
904 | case TLS_ST_CR_KEY_EXCH: |
905 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 906 | |
a230b26e EK |
907 | case TLS_ST_CR_CERT_REQ: |
908 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 909 | |
a230b26e EK |
910 | case TLS_ST_CR_SRVR_DONE: |
911 | return tls_process_server_done(s, pkt); | |
61ae935a | 912 | |
a230b26e EK |
913 | case TLS_ST_CR_CHANGE: |
914 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 915 | |
a230b26e EK |
916 | case TLS_ST_CR_SESSION_TICKET: |
917 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 918 | |
a230b26e EK |
919 | case TLS_ST_CR_FINISHED: |
920 | return tls_process_finished(s, pkt); | |
e46f2334 | 921 | |
c7f47786 MC |
922 | case TLS_ST_CR_HELLO_REQ: |
923 | return tls_process_hello_req(s, pkt); | |
924 | ||
e46f2334 MC |
925 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
926 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
927 | |
928 | case TLS_ST_CR_KEY_UPDATE: | |
929 | return tls_process_key_update(s, pkt); | |
61ae935a | 930 | } |
61ae935a MC |
931 | } |
932 | ||
933 | /* | |
934 | * Perform any further processing required following the receipt of a message | |
935 | * from the server | |
936 | */ | |
8481f583 | 937 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 938 | { |
d6f1a6e9 | 939 | OSSL_STATEM *st = &s->statem; |
61ae935a | 940 | |
a230b26e | 941 | switch (st->hand_state) { |
f3b3d7f0 RS |
942 | default: |
943 | /* Shouldn't happen */ | |
944 | return WORK_ERROR; | |
945 | ||
05c4f1d5 MC |
946 | case TLS_ST_CR_CERT_REQ: |
947 | return tls_prepare_client_certificate(s, wst); | |
948 | ||
61ae935a MC |
949 | #ifndef OPENSSL_NO_SCTP |
950 | case TLS_ST_CR_SRVR_DONE: | |
951 | /* We only get here if we are using SCTP and we are renegotiating */ | |
952 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
953 | s->s3->in_read_app_data = 2; | |
954 | s->rwstate = SSL_READING; | |
955 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
956 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 957 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
958 | return WORK_MORE_A; |
959 | } | |
fe3a3291 | 960 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
961 | return WORK_FINISHED_STOP; |
962 | #endif | |
61ae935a | 963 | } |
61ae935a MC |
964 | } |
965 | ||
7cea05dc | 966 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 967 | { |
2c7b4dbc | 968 | unsigned char *p; |
ec60ccc1 MC |
969 | size_t sess_id_len; |
970 | int i, protverr; | |
2c7b4dbc | 971 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 972 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
973 | SSL_COMP *comp; |
974 | #endif | |
b9908bf9 | 975 | SSL_SESSION *sess = s->session; |
0f113f3e | 976 | |
7cea05dc | 977 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
978 | /* Should not happen */ |
979 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 980 | return 0; |
2c7b4dbc | 981 | } |
0f113f3e | 982 | |
b9908bf9 | 983 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
984 | protverr = ssl_set_client_hello_version(s); |
985 | if (protverr != 0) { | |
986 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 987 | return 0; |
4fa52141 | 988 | } |
0f113f3e | 989 | |
a230b26e | 990 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 991 | /* |
b9908bf9 MC |
992 | * In the case of EAP-FAST, we can have a pre-shared |
993 | * "ticket" without a session ID. | |
0f113f3e | 994 | */ |
aff8c126 | 995 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
996 | (sess->not_resumable)) { |
997 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 998 | return 0; |
b9908bf9 MC |
999 | } |
1000 | /* else use the pre-loaded session */ | |
0f113f3e | 1001 | |
c7f47786 MC |
1002 | /* This is a real handshake so make sure we clean it up at the end */ |
1003 | s->statem.cleanuphand = 1; | |
1004 | ||
b9908bf9 | 1005 | p = s->s3->client_random; |
0f113f3e | 1006 | |
b9908bf9 MC |
1007 | /* |
1008 | * for DTLS if client_random is initialized, reuse it, we are | |
1009 | * required to use same upon reply to HelloVerify | |
1010 | */ | |
1011 | if (SSL_IS_DTLS(s)) { | |
1012 | size_t idx; | |
1013 | i = 1; | |
1014 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1015 | if (p[idx]) { | |
1016 | i = 0; | |
1017 | break; | |
0f113f3e | 1018 | } |
0f113f3e | 1019 | } |
b9908bf9 MC |
1020 | } else |
1021 | i = 1; | |
0f113f3e | 1022 | |
a230b26e | 1023 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1024 | return 0; |
b9908bf9 | 1025 | |
b9908bf9 MC |
1026 | /*- |
1027 | * version indicates the negotiated version: for example from | |
1028 | * an SSLv2/v3 compatible client hello). The client_version | |
1029 | * field is the maximum version we permit and it is also | |
1030 | * used in RSA encrypted premaster secrets. Some servers can | |
1031 | * choke if we initially report a higher version then | |
1032 | * renegotiate to a lower one in the premaster secret. This | |
1033 | * didn't happen with TLS 1.0 as most servers supported it | |
1034 | * but it can with TLS 1.1 or later if the server only supports | |
1035 | * 1.0. | |
1036 | * | |
1037 | * Possible scenario with previous logic: | |
1038 | * 1. Client hello indicates TLS 1.2 | |
1039 | * 2. Server hello says TLS 1.0 | |
1040 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1041 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1042 | * 5. Server sends hello request to renegotiate. |
1043 | * 6. Client hello indicates TLS v1.0 as we now | |
1044 | * know that is maximum server supports. | |
1045 | * 7. Server chokes on RSA encrypted premaster secret | |
1046 | * containing version 1.0. | |
1047 | * | |
1048 | * For interoperability it should be OK to always use the | |
1049 | * maximum version we support in client hello and then rely | |
1050 | * on the checking of version to ensure the servers isn't | |
1051 | * being inconsistent: for example initially negotiating with | |
1052 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1053 | * client_version in client hello and not resetting it to | |
1054 | * the negotiated version. | |
cd998837 MC |
1055 | * |
1056 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1057 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1058 | */ |
7acb8b64 | 1059 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1060 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1061 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1062 | return 0; |
2c7b4dbc | 1063 | } |
b9908bf9 MC |
1064 | |
1065 | /* Session ID */ | |
f05bcf0f | 1066 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1067 | sess_id_len = 0; |
b9908bf9 | 1068 | else |
ec60ccc1 MC |
1069 | sess_id_len = s->session->session_id_length; |
1070 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1071 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1072 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1073 | sess_id_len)) | |
7cea05dc | 1074 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1075 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1076 | return 0; |
b9908bf9 | 1077 | } |
0f113f3e | 1078 | |
b9908bf9 MC |
1079 | /* cookie stuff for DTLS */ |
1080 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1081 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1082 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1083 | s->d1->cookie_len)) { |
b9908bf9 | 1084 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1085 | return 0; |
0f113f3e | 1086 | } |
b9908bf9 MC |
1087 | } |
1088 | ||
1089 | /* Ciphers supported */ | |
7cea05dc | 1090 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1091 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1092 | return 0; |
2c7b4dbc MC |
1093 | } |
1094 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1095 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1096 | return 0; | |
1097 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1098 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1099 | return 0; |
b9908bf9 | 1100 | } |
0f113f3e | 1101 | |
b9908bf9 | 1102 | /* COMPRESSION */ |
7cea05dc | 1103 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1104 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1105 | return 0; |
2c7b4dbc MC |
1106 | } |
1107 | #ifndef OPENSSL_NO_COMP | |
1108 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1109 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1110 | for (i = 0; i < compnum; i++) { | |
1111 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1112 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1113 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1114 | return 0; |
2c7b4dbc MC |
1115 | } |
1116 | } | |
b9908bf9 | 1117 | } |
09b6c2ef | 1118 | #endif |
2c7b4dbc | 1119 | /* Add the NULL method */ |
7cea05dc | 1120 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1121 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1122 | return 0; |
2c7b4dbc | 1123 | } |
761772d7 | 1124 | |
b9908bf9 | 1125 | /* TLS extensions */ |
30aeba43 | 1126 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1127 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1128 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1129 | return 0; |
b9908bf9 | 1130 | } |
0f113f3e | 1131 | |
b9908bf9 | 1132 | return 1; |
0f113f3e | 1133 | } |
d02b48c6 | 1134 | |
be3583fa | 1135 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1136 | { |
1137 | int al; | |
cb150cbc | 1138 | size_t cookie_len; |
8ba708e5 MC |
1139 | PACKET cookiepkt; |
1140 | ||
1141 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1142 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1143 | al = SSL_AD_DECODE_ERROR; |
1144 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1145 | goto f_err; | |
1146 | } | |
1147 | ||
1148 | cookie_len = PACKET_remaining(&cookiepkt); | |
1149 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1150 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1151 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1152 | goto f_err; | |
1153 | } | |
1154 | ||
1155 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1156 | al = SSL_AD_DECODE_ERROR; | |
1157 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1158 | goto f_err; | |
1159 | } | |
1160 | s->d1->cookie_len = cookie_len; | |
1161 | ||
1162 | return MSG_PROCESS_FINISHED_READING; | |
1163 | f_err: | |
1164 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1165 | ossl_statem_set_error(s); |
8ba708e5 MC |
1166 | return MSG_PROCESS_ERROR; |
1167 | } | |
1168 | ||
be3583fa | 1169 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1170 | { |
1171 | STACK_OF(SSL_CIPHER) *sk; | |
1172 | const SSL_CIPHER *c; | |
332eb390 | 1173 | PACKET session_id, extpkt; |
b9908bf9 | 1174 | size_t session_id_len; |
b6981744 | 1175 | const unsigned char *cipherchars; |
b9908bf9 MC |
1176 | int i, al = SSL_AD_INTERNAL_ERROR; |
1177 | unsigned int compression; | |
4fa52141 | 1178 | unsigned int sversion; |
3434f40b | 1179 | unsigned int context; |
4fa52141 | 1180 | int protverr; |
332eb390 | 1181 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1182 | #ifndef OPENSSL_NO_COMP |
1183 | SSL_COMP *comp; | |
1184 | #endif | |
1185 | ||
4fa52141 VD |
1186 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1187 | al = SSL_AD_DECODE_ERROR; | |
1188 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1189 | goto f_err; | |
1190 | } | |
50932c4a | 1191 | |
4ff65f77 | 1192 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1193 | protverr = ssl_choose_client_version(s, sversion); |
1194 | if (protverr != 0) { | |
1195 | al = SSL_AD_PROTOCOL_VERSION; | |
1196 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1197 | goto f_err; | |
0f113f3e | 1198 | } |
0f113f3e MC |
1199 | |
1200 | /* load the server hello data */ | |
1201 | /* load the server random */ | |
73999b62 | 1202 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1203 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1204 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1205 | goto f_err; |
1206 | } | |
0f113f3e | 1207 | |
fc5ce51d | 1208 | /* Get the session-id. */ |
71728dd8 MC |
1209 | if (!SSL_IS_TLS13(s)) { |
1210 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1211 | al = SSL_AD_DECODE_ERROR; | |
1212 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1213 | goto f_err; | |
1214 | } | |
1215 | session_id_len = PACKET_remaining(&session_id); | |
1216 | if (session_id_len > sizeof s->session->session_id | |
1217 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1218 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1219 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1220 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1221 | goto f_err; | |
1222 | } | |
1223 | } else { | |
625b0d51 | 1224 | PACKET_null_init(&session_id); |
71728dd8 | 1225 | session_id_len = 0; |
0f113f3e | 1226 | } |
e481f9b9 | 1227 | |
73999b62 | 1228 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1229 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1230 | al = SSL_AD_DECODE_ERROR; |
1231 | goto f_err; | |
1232 | } | |
1233 | ||
4ff65f77 MC |
1234 | if (!SSL_IS_TLS13(s)) { |
1235 | if (!PACKET_get_1(pkt, &compression)) { | |
1236 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1237 | al = SSL_AD_DECODE_ERROR; | |
1238 | goto f_err; | |
1239 | } | |
1240 | } else { | |
1241 | compression = 0; | |
1242 | } | |
1243 | ||
1244 | /* TLS extensions */ | |
1245 | if (PACKET_remaining(pkt) == 0) { | |
1246 | PACKET_null_init(&extpkt); | |
1247 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1248 | al = SSL_AD_DECODE_ERROR; | |
1249 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1250 | goto f_err; | |
1251 | } | |
1252 | ||
1253 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1254 | : EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1255 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1256 | goto f_err; |
1257 | ||
1258 | s->hit = 0; | |
1259 | ||
1260 | if (SSL_IS_TLS13(s)) { | |
1261 | /* This will set s->hit if we are resuming */ | |
1262 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1263 | EXT_TLS1_3_SERVER_HELLO, | |
1264 | extensions, NULL, 0, &al)) | |
1265 | goto f_err; | |
1266 | } else { | |
8c1a5343 | 1267 | /* |
4ff65f77 MC |
1268 | * Check if we can resume the session based on external pre-shared |
1269 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1270 | * Resumption based on server-side state works with session IDs. | |
1271 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1272 | * works by overriding the SessionTicket extension at the application | |
1273 | * layer, and does not send a session ID. (We do not know whether | |
1274 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1275 | * ID alone is not a reliable indicator of session resumption, so we | |
1276 | * first check if we can resume, and later peek at the next handshake | |
1277 | * message to see if the server wants to resume. | |
8c1a5343 | 1278 | */ |
4ff65f77 MC |
1279 | if (s->version >= TLS1_VERSION |
1280 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1281 | const SSL_CIPHER *pref_cipher = NULL; | |
1282 | /* | |
1283 | * s->session->master_key_length is a size_t, but this is an int for | |
1284 | * backwards compat reasons | |
1285 | */ | |
1286 | int master_key_length; | |
1287 | master_key_length = sizeof(s->session->master_key); | |
1288 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1289 | &master_key_length, | |
1290 | NULL, &pref_cipher, | |
1291 | s->ext.session_secret_cb_arg) | |
1292 | && master_key_length > 0) { | |
1293 | s->session->master_key_length = master_key_length; | |
1294 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1295 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1296 | } else { |
1297 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1298 | al = SSL_AD_INTERNAL_ERROR; | |
1299 | goto f_err; | |
1300 | } | |
0f113f3e | 1301 | } |
4ff65f77 MC |
1302 | |
1303 | if (session_id_len != 0 | |
1304 | && session_id_len == s->session->session_id_length | |
1305 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1306 | session_id_len) == 0) | |
1307 | s->hit = 1; | |
50932c4a MC |
1308 | } |
1309 | ||
4ff65f77 | 1310 | if (s->hit) { |
0f113f3e | 1311 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1312 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1313 | /* actually a client application bug */ |
1314 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1315 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1316 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1317 | goto f_err; | |
1318 | } | |
6e3d0153 | 1319 | } else { |
0f113f3e | 1320 | /* |
6e3d0153 | 1321 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1322 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1323 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1324 | * so the PAC-based session secret is always preserved. It'll be | |
1325 | * overwritten if the server refuses resumption. | |
0f113f3e | 1326 | */ |
4ff65f77 MC |
1327 | if (s->session->session_id_length > 0 |
1328 | || (SSL_IS_TLS13(s) | |
1329 | && s->session->ext.tick_identity | |
1330 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1331 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1332 | if (!ssl_get_new_session(s, 0)) { |
1333 | goto f_err; | |
1334 | } | |
1335 | } | |
50932c4a | 1336 | |
ccae4a15 | 1337 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1338 | s->session->session_id_length = session_id_len; |
1339 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1340 | if (session_id_len > 0) |
1341 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1342 | session_id_len); | |
0f113f3e | 1343 | } |
fc5ce51d | 1344 | |
ccae4a15 FI |
1345 | /* Session version and negotiated protocol version should match */ |
1346 | if (s->version != s->session->ssl_version) { | |
1347 | al = SSL_AD_PROTOCOL_VERSION; | |
1348 | ||
1349 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1350 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1351 | goto f_err; | |
1352 | } | |
1353 | ||
60d685d1 | 1354 | c = ssl_get_cipher_by_char(s, cipherchars, 0); |
0f113f3e MC |
1355 | if (c == NULL) { |
1356 | /* unknown cipher */ | |
1357 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1358 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1359 | goto f_err; |
1360 | } | |
0f113f3e | 1361 | /* |
3eb2aff4 KR |
1362 | * Now that we know the version, update the check to see if it's an allowed |
1363 | * version. | |
1364 | */ | |
1365 | s->s3->tmp.min_ver = s->version; | |
1366 | s->s3->tmp.max_ver = s->version; | |
1367 | /* | |
1368 | * If it is a disabled cipher we either didn't send it in client hello, | |
1369 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1370 | */ |
1371 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1372 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1373 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1374 | goto f_err; |
1375 | } | |
0f113f3e MC |
1376 | |
1377 | sk = ssl_get_ciphers_by_id(s); | |
1378 | i = sk_SSL_CIPHER_find(sk, c); | |
1379 | if (i < 0) { | |
1380 | /* we did not say we would use this cipher */ | |
1381 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1382 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1383 | goto f_err; |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Depending on the session caching (internal/external), the cipher | |
1388 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1389 | * set and use it for comparison. | |
1390 | */ | |
1391 | if (s->session->cipher) | |
1392 | s->session->cipher_id = s->session->cipher->id; | |
1393 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1394 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1395 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1396 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1397 | goto f_err; | |
0f113f3e MC |
1398 | } |
1399 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1400 | |
09b6c2ef | 1401 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1402 | if (compression != 0) { |
0f113f3e | 1403 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1404 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1405 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1406 | goto f_err; | |
1407 | } | |
1408 | /* | |
1409 | * If compression is disabled we'd better not try to resume a session | |
1410 | * using compression. | |
1411 | */ | |
1412 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1413 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1414 | goto f_err; |
1415 | } | |
09b6c2ef | 1416 | #else |
fc5ce51d | 1417 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1418 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1419 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1420 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1421 | goto f_err; | |
1422 | } | |
fc5ce51d | 1423 | if (compression == 0) |
0f113f3e MC |
1424 | comp = NULL; |
1425 | else if (!ssl_allow_compression(s)) { | |
1426 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1427 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1428 | goto f_err; |
fc5ce51d EK |
1429 | } else { |
1430 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1431 | } | |
0f113f3e | 1432 | |
fc5ce51d | 1433 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1434 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1435 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1436 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1437 | goto f_err; | |
1438 | } else { | |
1439 | s->s3->tmp.new_compression = comp; | |
1440 | } | |
09b6c2ef | 1441 | #endif |
761772d7 | 1442 | |
4ff65f77 | 1443 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1444 | goto f_err; |
1445 | ||
8723588e MC |
1446 | #ifndef OPENSSL_NO_SCTP |
1447 | if (SSL_IS_DTLS(s) && s->hit) { | |
1448 | unsigned char sctpauthkey[64]; | |
1449 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1450 | ||
1451 | /* | |
1452 | * Add new shared key for SCTP-Auth, will be ignored if | |
1453 | * no SCTP used. | |
1454 | */ | |
141eb8c6 MC |
1455 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1456 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1457 | |
1458 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1459 | sizeof(sctpauthkey), |
1460 | labelbuffer, | |
1461 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1462 | goto f_err; |
8723588e MC |
1463 | |
1464 | BIO_ctrl(SSL_get_wbio(s), | |
1465 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1466 | sizeof(sctpauthkey), sctpauthkey); | |
1467 | } | |
1468 | #endif | |
1469 | ||
92760c21 MC |
1470 | /* |
1471 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1472 | * we're done with this message | |
1473 | */ | |
1474 | if (SSL_IS_TLS13(s) | |
1475 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1476 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1477 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1478 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1479 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1480 | al = SSL_AD_INTERNAL_ERROR; | |
1481 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1482 | goto f_err; | |
1483 | } | |
1484 | ||
1b0286a3 | 1485 | OPENSSL_free(extensions); |
b9908bf9 | 1486 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1487 | f_err: |
1488 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1489 | ossl_statem_set_error(s); |
1b0286a3 | 1490 | OPENSSL_free(extensions); |
b9908bf9 | 1491 | return MSG_PROCESS_ERROR; |
0f113f3e | 1492 | } |
d02b48c6 | 1493 | |
3847d426 MC |
1494 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1495 | { | |
1496 | unsigned int sversion; | |
2248dbeb | 1497 | int errorcode; |
3847d426 MC |
1498 | RAW_EXTENSION *extensions = NULL; |
1499 | int al; | |
1500 | PACKET extpkt; | |
1501 | ||
1502 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1503 | al = SSL_AD_DECODE_ERROR; | |
1504 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1505 | goto f_err; | |
1506 | } | |
1507 | ||
1508 | s->hello_retry_request = 1; | |
1509 | ||
1510 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1511 | errorcode = ssl_choose_client_version(s, sversion); |
1512 | if (errorcode != 0) { | |
3847d426 | 1513 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1514 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1515 | goto f_err; |
1516 | } | |
1517 | ||
1518 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1519 | al = SSL_AD_DECODE_ERROR; | |
1520 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1521 | goto f_err; | |
1522 | } | |
1523 | ||
1524 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
fc5ece2e | 1525 | &extensions, &al, NULL) |
3847d426 MC |
1526 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, |
1527 | extensions, NULL, 0, &al)) | |
1528 | goto f_err; | |
1529 | ||
1530 | OPENSSL_free(extensions); | |
1531 | ||
1532 | return MSG_PROCESS_FINISHED_READING; | |
1533 | f_err: | |
1534 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1535 | ossl_statem_set_error(s); | |
1536 | OPENSSL_free(extensions); | |
1537 | return MSG_PROCESS_ERROR; | |
1538 | } | |
1539 | ||
be3583fa | 1540 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1541 | { |
1542 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1543 | unsigned long cert_list_len, cert_len; | |
1544 | X509 *x = NULL; | |
b6981744 | 1545 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1546 | STACK_OF(X509) *sk = NULL; |
1547 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1548 | size_t chainidx; |
e96e0f8e | 1549 | unsigned int context = 0; |
0f113f3e MC |
1550 | |
1551 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1552 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1553 | goto err; |
0f113f3e MC |
1554 | } |
1555 | ||
e96e0f8e MC |
1556 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1557 | || context != 0 | |
1558 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1559 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1560 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1561 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1562 | goto f_err; |
1563 | } | |
d805a57b | 1564 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1565 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1566 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1567 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1568 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1569 | SSL_R_CERT_LENGTH_MISMATCH); |
1570 | goto f_err; | |
1571 | } | |
1572 | ||
df758a85 MC |
1573 | certstart = certbytes; |
1574 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1575 | if (x == NULL) { |
1576 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1577 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1578 | goto f_err; |
1579 | } | |
df758a85 | 1580 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1581 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1582 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1583 | SSL_R_CERT_LENGTH_MISMATCH); |
1584 | goto f_err; | |
1585 | } | |
e96e0f8e MC |
1586 | |
1587 | if (SSL_IS_TLS13(s)) { | |
1588 | RAW_EXTENSION *rawexts = NULL; | |
1589 | PACKET extensions; | |
1590 | ||
1591 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1592 | al = SSL_AD_DECODE_ERROR; | |
1593 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1594 | goto f_err; | |
1595 | } | |
1596 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
fc5ece2e | 1597 | &rawexts, &al, NULL) |
e96e0f8e | 1598 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, |
5ee289ea MC |
1599 | rawexts, x, chainidx, &al)) { |
1600 | OPENSSL_free(rawexts); | |
e96e0f8e | 1601 | goto f_err; |
5ee289ea MC |
1602 | } |
1603 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1604 | } |
1605 | ||
0f113f3e | 1606 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1607 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1608 | goto err; |
0f113f3e MC |
1609 | } |
1610 | x = NULL; | |
0f113f3e MC |
1611 | } |
1612 | ||
1613 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1614 | /* |
1615 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1616 | * for client side verification of the server certificate to take place. | |
1617 | * However, historically the code has only checked that *any* flag is set | |
1618 | * to cause server verification to take place. Use of the other flags makes | |
1619 | * no sense in client mode. An attempt to clean up the semantics was | |
1620 | * reverted because at least one application *only* set | |
1621 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1622 | * server verification to take place, after the clean up it silently did | |
1623 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1624 | * sent to them because they are void functions. Therefore, we now use the | |
1625 | * (less clean) historic behaviour of performing validation if any flag is | |
1626 | * set. The *documented* interface remains the same. | |
1627 | */ | |
1628 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1629 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1630 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1631 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1632 | goto f_err; | |
1633 | } | |
1634 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1635 | if (i > 1) { | |
b9908bf9 | 1636 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1637 | al = SSL_AD_HANDSHAKE_FAILURE; |
1638 | goto f_err; | |
1639 | } | |
1640 | ||
c34b0f99 | 1641 | s->session->peer_chain = sk; |
0f113f3e MC |
1642 | /* |
1643 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1644 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1645 | */ |
1646 | x = sk_X509_value(sk, 0); | |
1647 | sk = NULL; | |
1648 | /* | |
1649 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1650 | */ | |
1651 | ||
8382fd3a | 1652 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1653 | |
55a9a16f | 1654 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1655 | x = NULL; |
1656 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1657 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1658 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1659 | goto f_err; | |
1660 | } | |
1661 | ||
1662 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1663 | if (i < 0) { |
0f113f3e MC |
1664 | x = NULL; |
1665 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1666 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1667 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1668 | goto f_err; | |
1669 | } | |
05b8486e DSH |
1670 | /* |
1671 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1672 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1673 | * type. | |
1674 | */ | |
1675 | if (!SSL_IS_TLS13(s)) { | |
1676 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1677 | if (exp_idx >= 0 && i != exp_idx | |
1678 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1679 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1680 | && i != SSL_PKEY_GOST01))) { | |
1681 | x = NULL; | |
1682 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1683 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1684 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1685 | goto f_err; | |
1686 | } | |
0f113f3e | 1687 | } |
a273c6ee | 1688 | s->session->peer_type = i; |
55a9a16f MC |
1689 | |
1690 | X509_free(s->session->peer); | |
05f0fb9f | 1691 | X509_up_ref(x); |
55a9a16f | 1692 | s->session->peer = x; |
0f113f3e | 1693 | s->session->verify_result = s->verify_result; |
0f113f3e | 1694 | x = NULL; |
2c5dfdc3 MC |
1695 | |
1696 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1697 | if (SSL_IS_TLS13(s) | |
1698 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1699 | sizeof(s->cert_verify_hash), | |
1700 | &s->cert_verify_hash_len)) { | |
1701 | al = SSL_AD_INTERNAL_ERROR; | |
1702 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1703 | goto f_err; | |
1704 | } | |
1705 | ||
b9908bf9 | 1706 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1707 | goto done; |
1708 | ||
0f113f3e | 1709 | f_err: |
66696478 | 1710 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1711 | err: |
fe3a3291 | 1712 | ossl_statem_set_error(s); |
66696478 | 1713 | done: |
0f113f3e MC |
1714 | X509_free(x); |
1715 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1716 | return ret; |
0f113f3e | 1717 | } |
d02b48c6 | 1718 | |
7dc1c647 | 1719 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1720 | { |
1721 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1722 | PACKET psk_identity_hint; |
02a74590 | 1723 | |
7dc1c647 MC |
1724 | /* PSK ciphersuites are preceded by an identity hint */ |
1725 | ||
1726 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1727 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1728 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1729 | return 0; |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * Store PSK identity hint for later use, hint is used in | |
1734 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1735 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1736 | * identity. | |
1737 | */ | |
1738 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1739 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1740 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1741 | return 0; |
1742 | } | |
02a74590 | 1743 | |
7dc1c647 MC |
1744 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1745 | OPENSSL_free(s->session->psk_identity_hint); | |
1746 | s->session->psk_identity_hint = NULL; | |
1747 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1748 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1749 | *al = SSL_AD_INTERNAL_ERROR; |
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | return 1; | |
1754 | #else | |
4fa88861 | 1755 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1756 | *al = SSL_AD_INTERNAL_ERROR; |
1757 | return 0; | |
02a74590 MC |
1758 | #endif |
1759 | } | |
1760 | ||
25c6c10c MC |
1761 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1762 | { | |
1763 | #ifndef OPENSSL_NO_SRP | |
1764 | PACKET prime, generator, salt, server_pub; | |
1765 | ||
1766 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1767 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1768 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1769 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1770 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1771 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1772 | return 0; |
1773 | } | |
1774 | ||
348240c6 | 1775 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1776 | if ((s->srp_ctx.N = |
1777 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1778 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1779 | || (s->srp_ctx.g = |
1780 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1781 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1782 | || (s->srp_ctx.s = |
1783 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1784 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1785 | || (s->srp_ctx.B = |
1786 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1787 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1788 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1789 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1790 | return 0; |
1791 | } | |
1792 | ||
1793 | if (!srp_verify_server_param(s, al)) { | |
1794 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1795 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1796 | return 0; |
1797 | } | |
1798 | ||
1799 | /* We must check if there is a certificate */ | |
a230b26e | 1800 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1801 | *pkey = X509_get0_pubkey(s->session->peer); |
1802 | ||
1803 | return 1; | |
1804 | #else | |
4fa88861 | 1805 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1806 | *al = SSL_AD_INTERNAL_ERROR; |
1807 | return 0; | |
1808 | #endif | |
1809 | } | |
1810 | ||
e01a610d MC |
1811 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1812 | { | |
1813 | #ifndef OPENSSL_NO_DH | |
1814 | PACKET prime, generator, pub_key; | |
1815 | EVP_PKEY *peer_tmp = NULL; | |
1816 | ||
1817 | DH *dh = NULL; | |
1818 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1819 | ||
26505153 RL |
1820 | int check_bits = 0; |
1821 | ||
e01a610d MC |
1822 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1823 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1824 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1825 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1826 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1827 | return 0; |
1828 | } | |
1829 | ||
1830 | peer_tmp = EVP_PKEY_new(); | |
1831 | dh = DH_new(); | |
1832 | ||
1833 | if (peer_tmp == NULL || dh == NULL) { | |
1834 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1835 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1836 | goto err; |
1837 | } | |
1838 | ||
348240c6 MC |
1839 | /* TODO(size_t): Convert these calls */ |
1840 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1841 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1842 | NULL); | |
1843 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1844 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1845 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1846 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1847 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1848 | goto err; |
1849 | } | |
1850 | ||
26505153 RL |
1851 | /* test non-zero pupkey */ |
1852 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1853 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1854 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1855 | goto err; |
1856 | } | |
1857 | ||
1858 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1859 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1860 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1861 | goto err; |
1862 | } | |
1863 | p = g = NULL; | |
1864 | ||
26505153 RL |
1865 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1866 | *al = SSL_AD_DECODE_ERROR; | |
1867 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1868 | goto err; | |
1869 | } | |
1870 | ||
e01a610d MC |
1871 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1872 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1873 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1874 | goto err; |
1875 | } | |
1876 | bnpub_key = NULL; | |
1877 | ||
1878 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1879 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1880 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1881 | goto err; |
1882 | } | |
1883 | ||
1884 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1885 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1886 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1887 | goto err; |
1888 | } | |
1889 | ||
1890 | s->s3->peer_tmp = peer_tmp; | |
1891 | ||
1892 | /* | |
1893 | * FIXME: This makes assumptions about which ciphersuites come with | |
1894 | * public keys. We should have a less ad-hoc way of doing this | |
1895 | */ | |
a230b26e | 1896 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1897 | *pkey = X509_get0_pubkey(s->session->peer); |
1898 | /* else anonymous DH, so no certificate or pkey. */ | |
1899 | ||
1900 | return 1; | |
1901 | ||
1902 | err: | |
1903 | BN_free(p); | |
1904 | BN_free(g); | |
1905 | BN_free(bnpub_key); | |
1906 | DH_free(dh); | |
1907 | EVP_PKEY_free(peer_tmp); | |
1908 | ||
1909 | return 0; | |
1910 | #else | |
4fa88861 | 1911 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1912 | *al = SSL_AD_INTERNAL_ERROR; |
1913 | return 0; | |
1914 | #endif | |
1915 | } | |
1916 | ||
ff74aeb1 MC |
1917 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1918 | { | |
1919 | #ifndef OPENSSL_NO_EC | |
1920 | PACKET encoded_pt; | |
1921 | const unsigned char *ecparams; | |
1922 | int curve_nid; | |
ec24630a | 1923 | unsigned int curve_flags; |
ff74aeb1 MC |
1924 | EVP_PKEY_CTX *pctx = NULL; |
1925 | ||
1926 | /* | |
1927 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1928 | * public key. For now we only support named (not generic) curves and | |
1929 | * ECParameters in this case is just three bytes. | |
1930 | */ | |
1931 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1932 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1933 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1934 | return 0; |
1935 | } | |
1936 | /* | |
1937 | * Check curve is one of our preferences, if not server has sent an | |
1938 | * invalid curve. ECParameters is 3 bytes. | |
1939 | */ | |
1940 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1941 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1942 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1943 | return 0; |
1944 | } | |
1945 | ||
ec24630a DSH |
1946 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1947 | ||
a230b26e | 1948 | if (curve_nid == 0) { |
ff74aeb1 | 1949 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1950 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1951 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1952 | return 0; | |
1953 | } | |
1954 | ||
ec24630a DSH |
1955 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1956 | EVP_PKEY *key = EVP_PKEY_new(); | |
1957 | ||
1958 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1959 | *al = SSL_AD_INTERNAL_ERROR; | |
1960 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1961 | EVP_PKEY_free(key); | |
1962 | return 0; | |
1963 | } | |
1964 | s->s3->peer_tmp = key; | |
1965 | } else { | |
1966 | /* Set up EVP_PKEY with named curve as parameters */ | |
1967 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1968 | if (pctx == NULL | |
1969 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1970 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1971 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1972 | *al = SSL_AD_INTERNAL_ERROR; | |
1973 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1974 | EVP_PKEY_CTX_free(pctx); | |
1975 | return 0; | |
1976 | } | |
ff74aeb1 | 1977 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1978 | pctx = NULL; |
ff74aeb1 | 1979 | } |
ff74aeb1 MC |
1980 | |
1981 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1982 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1983 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1984 | return 0; |
1985 | } | |
1986 | ||
ec24630a DSH |
1987 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1988 | PACKET_data(&encoded_pt), | |
1989 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1990 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1991 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1992 | return 0; |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1997 | * ECParameters in the server key exchange message. We do support RSA | |
1998 | * and ECDSA. | |
1999 | */ | |
2000 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2001 | *pkey = X509_get0_pubkey(s->session->peer); | |
2002 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2003 | *pkey = X509_get0_pubkey(s->session->peer); | |
2004 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2005 | ||
2006 | return 1; | |
2007 | #else | |
4fa88861 | 2008 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2009 | *al = SSL_AD_INTERNAL_ERROR; |
2010 | return 0; | |
2011 | #endif | |
2012 | } | |
2013 | ||
be3583fa | 2014 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2015 | { |
5554facb | 2016 | int al = -1; |
e1e588ac | 2017 | long alg_k; |
b9908bf9 | 2018 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2019 | EVP_MD_CTX *md_ctx = NULL; |
2020 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2021 | PACKET save_param_start, signature; |
b9908bf9 | 2022 | |
b9908bf9 MC |
2023 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2024 | ||
73999b62 | 2025 | save_param_start = *pkt; |
8d92c1f8 | 2026 | |
3260adf1 | 2027 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2028 | EVP_PKEY_free(s->s3->peer_tmp); |
2029 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2030 | #endif |
d02b48c6 | 2031 | |
7689082b | 2032 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2033 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2034 | goto err; | |
7689082b DSH |
2035 | } |
2036 | ||
2037 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2038 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2039 | } else if (alg_k & SSL_kSRP) { |
2040 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2041 | goto err; |
e01a610d MC |
2042 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2043 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2044 | goto err; | |
ff74aeb1 MC |
2045 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2046 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2047 | goto err; | |
0f113f3e MC |
2048 | } else if (alg_k) { |
2049 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2050 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2051 | goto err; |
0f113f3e | 2052 | } |
0f113f3e | 2053 | |
0f113f3e MC |
2054 | /* if it was signed, check the signature */ |
2055 | if (pkey != NULL) { | |
32942870 | 2056 | PACKET params; |
be8dba2c MC |
2057 | int maxsig; |
2058 | const EVP_MD *md = NULL; | |
e1e588ac | 2059 | |
32942870 EK |
2060 | /* |
2061 | * |pkt| now points to the beginning of the signature, so the difference | |
2062 | * equals the length of the parameters. | |
2063 | */ | |
2064 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2065 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2066 | PACKET_remaining(pkt))) { |
32942870 | 2067 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2068 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2069 | goto err; |
32942870 EK |
2070 | } |
2071 | ||
0f113f3e | 2072 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2073 | unsigned int sigalg; |
0f113f3e | 2074 | int rv; |
703bcee0 MC |
2075 | |
2076 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2077 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2078 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2079 | goto err; |
0f113f3e | 2080 | } |
5554facb | 2081 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2082 | if (rv == -1) { |
2083 | al = SSL_AD_INTERNAL_ERROR; | |
2084 | goto err; | |
2085 | } else if (rv == 0) { | |
2086 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2087 | goto err; |
0f113f3e | 2088 | } |
a2f9200f | 2089 | #ifdef SSL_DEBUG |
0f113f3e MC |
2090 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2091 | #endif | |
f365a3e2 DSH |
2092 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2093 | al = SSL_AD_INTERNAL_ERROR; | |
2094 | goto err; | |
32942870 | 2095 | } |
0f113f3e | 2096 | |
f365a3e2 DSH |
2097 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2098 | ||
73999b62 MC |
2099 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2100 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2101 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2102 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2103 | goto err; |
0f113f3e | 2104 | } |
be8dba2c MC |
2105 | maxsig = EVP_PKEY_size(pkey); |
2106 | if (maxsig < 0) { | |
e1e588ac | 2107 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2108 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2109 | goto err; |
8098fc56 | 2110 | } |
0f113f3e MC |
2111 | |
2112 | /* | |
8098fc56 | 2113 | * Check signature length |
0f113f3e | 2114 | */ |
be8dba2c | 2115 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2116 | /* wrong packet length */ |
e1e588ac | 2117 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2118 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2119 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2120 | goto err; |
2121 | } | |
2122 | ||
2123 | md_ctx = EVP_MD_CTX_new(); | |
2124 | if (md_ctx == NULL) { | |
2125 | al = SSL_AD_INTERNAL_ERROR; | |
2126 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2127 | goto err; | |
0f113f3e | 2128 | } |
e1e588ac | 2129 | |
fe3066ee MC |
2130 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2131 | al = SSL_AD_INTERNAL_ERROR; | |
2132 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2133 | goto err; | |
2134 | } | |
5554facb | 2135 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2136 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2137 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2138 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2139 | al = SSL_AD_INTERNAL_ERROR; |
2140 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2141 | goto err; | |
2142 | } | |
2143 | } | |
2144 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2145 | SSL3_RANDOM_SIZE) <= 0 | |
2146 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2147 | SSL3_RANDOM_SIZE) <= 0 | |
2148 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2149 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2150 | al = SSL_AD_INTERNAL_ERROR; |
2151 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2152 | goto err; |
192e4bbb | 2153 | } |
fe3066ee MC |
2154 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2155 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2156 | /* bad signature */ |
2157 | al = SSL_AD_DECRYPT_ERROR; | |
2158 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2159 | goto err; |
0f113f3e | 2160 | } |
e1e588ac | 2161 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2162 | md_ctx = NULL; |
0f113f3e | 2163 | } else { |
7689082b | 2164 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2165 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2166 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2167 | /* Might be wrong key type, check it */ |
e1e588ac | 2168 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2169 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2170 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2171 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2172 | } else { |
2173 | al = SSL_AD_DECODE_ERROR; | |
2174 | } | |
0f113f3e MC |
2175 | goto err; |
2176 | } | |
2177 | /* still data left over */ | |
73999b62 | 2178 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2179 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2180 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2181 | goto err; |
0f113f3e MC |
2182 | } |
2183 | } | |
e1e588ac | 2184 | |
b9908bf9 | 2185 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2186 | err: |
7dc1c647 MC |
2187 | if (al != -1) |
2188 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2189 | ossl_statem_set_error(s); |
fe3066ee | 2190 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2191 | return MSG_PROCESS_ERROR; |
0f113f3e | 2192 | } |
d02b48c6 | 2193 | |
be3583fa | 2194 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2195 | { |
2196 | int ret = MSG_PROCESS_ERROR; | |
03f44b97 | 2197 | unsigned int i, name_len; |
b9908bf9 | 2198 | X509_NAME *xn = NULL; |
b6981744 | 2199 | const unsigned char *namestart, *namebytes; |
b9908bf9 | 2200 | STACK_OF(X509_NAME) *ca_sk = NULL; |
03f44b97 | 2201 | PACKET cadns; |
0f113f3e MC |
2202 | |
2203 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2204 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2205 | goto err; |
2206 | } | |
2207 | ||
03f44b97 DSH |
2208 | if (SSL_IS_TLS13(s)) { |
2209 | PACKET reqctx; | |
2210 | ||
2211 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2212 | OPENSSL_free(s->s3->tmp.ctype); | |
2213 | s->s3->tmp.ctype = NULL; | |
2214 | s->s3->tmp.ctype_len = 0; | |
2215 | /* TODO(TLS1.3) need to process request context, for now ignore */ | |
2216 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2217 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2218 | SSL_R_LENGTH_MISMATCH); | |
2219 | goto err; | |
2220 | } | |
2221 | } else { | |
2222 | PACKET ctypes; | |
75c13e78 | 2223 | |
03f44b97 DSH |
2224 | /* get the certificate types */ |
2225 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
2226 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2227 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2228 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2229 | goto err; |
03f44b97 DSH |
2230 | } |
2231 | ||
2232 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
2233 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); | |
2234 | goto err; | |
2235 | } | |
0f113f3e | 2236 | } |
ac112332 | 2237 | |
0f113f3e | 2238 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2239 | PACKET sigalgs; |
2240 | ||
2241 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2242 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2243 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2244 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2245 | goto err; |
2246 | } | |
ac112332 | 2247 | |
9195ddcd DSH |
2248 | /* Clear certificate validity flags */ |
2249 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 2250 | s->s3->tmp.valid_flags[i] = 0; |
703bcee0 | 2251 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2252 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2253 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2254 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2255 | goto err; | |
2256 | } | |
2257 | if (!tls1_process_sigalgs(s)) { | |
2258 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2259 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2260 | goto err; |
2261 | } | |
0f113f3e MC |
2262 | } |
2263 | ||
2264 | /* get the CA RDNs */ | |
03f44b97 | 2265 | if (!PACKET_get_length_prefixed_2(pkt, &cadns)) { |
0f113f3e | 2266 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2267 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2268 | goto err; |
2269 | } | |
2270 | ||
03f44b97 DSH |
2271 | while (PACKET_remaining(&cadns)) { |
2272 | if (!PACKET_get_net_2(&cadns, &name_len) | |
2273 | || !PACKET_get_bytes(&cadns, &namebytes, name_len)) { | |
0f113f3e | 2274 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2275 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2276 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2277 | goto err; |
2278 | } | |
2279 | ||
ac112332 | 2280 | namestart = namebytes; |
0f113f3e | 2281 | |
ac112332 MC |
2282 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2283 | name_len)) == NULL) { | |
3c33c6f6 | 2284 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2285 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2286 | goto err; |
0f113f3e MC |
2287 | } |
2288 | ||
ac112332 | 2289 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2290 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2291 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2292 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2293 | goto err; | |
2294 | } | |
2295 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2296 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2297 | goto err; |
2298 | } | |
6afef8b1 | 2299 | xn = NULL; |
0f113f3e | 2300 | } |
03f44b97 DSH |
2301 | /* TODO(TLS1.3) need to parse and process extensions, for now ignore */ |
2302 | if (SSL_IS_TLS13(s)) { | |
2303 | PACKET reqexts; | |
2304 | ||
2305 | if (!PACKET_get_length_prefixed_2(pkt, &reqexts)) { | |
2306 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2307 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2308 | SSL_R_EXT_LENGTH_MISMATCH); | |
2309 | goto err; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | if (PACKET_remaining(pkt) != 0) { | |
2314 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2315 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2316 | goto err; | |
2317 | } | |
0f113f3e | 2318 | |
0f113f3e MC |
2319 | /* we should setup a certificate to return.... */ |
2320 | s->s3->tmp.cert_req = 1; | |
222561fe | 2321 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2322 | s->s3->tmp.ca_names = ca_sk; |
2323 | ca_sk = NULL; | |
2324 | ||
05c4f1d5 | 2325 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2326 | goto done; |
0f113f3e | 2327 | err: |
fe3a3291 | 2328 | ossl_statem_set_error(s); |
cc273a93 | 2329 | done: |
6afef8b1 | 2330 | X509_NAME_free(xn); |
222561fe | 2331 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2332 | return ret; |
0f113f3e MC |
2333 | } |
2334 | ||
2335 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2336 | { |
0f113f3e | 2337 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2338 | } |
dfeab068 | 2339 | |
be3583fa | 2340 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2341 | { |
6df55cac | 2342 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2343 | unsigned int ticklen; |
9ac6244b | 2344 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2345 | unsigned int sess_len; |
de1df7e9 | 2346 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2347 | |
73999b62 | 2348 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2349 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2350 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2351 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2352 | || (SSL_IS_TLS13(s) |
2353 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2354 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2355 | goto f_err; |
2356 | } | |
2357 | ||
de1df7e9 MC |
2358 | /* |
2359 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2360 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2361 | * be 0 here in that instance | |
2362 | */ | |
e711da71 | 2363 | if (ticklen == 0) |
c9de4a20 | 2364 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2365 | |
de1df7e9 | 2366 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2367 | if (s->session->session_id_length > 0) { |
2368 | int i = s->session_ctx->session_cache_mode; | |
2369 | SSL_SESSION *new_sess; | |
2370 | /* | |
2371 | * We reused an existing session, so we need to replace it with a new | |
2372 | * one | |
2373 | */ | |
2374 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2375 | /* | |
e4612d02 | 2376 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2377 | */ |
e4612d02 | 2378 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2379 | } |
2380 | ||
2381 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2382 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2383 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2384 | goto f_err; |
2385 | } | |
2386 | ||
2387 | SSL_SESSION_free(s->session); | |
2388 | s->session = new_sess; | |
2389 | } | |
2390 | ||
fc24f0bf MC |
2391 | /* |
2392 | * Technically the cast to long here is not guaranteed by the C standard - | |
2393 | * but we use it elsewhere, so this should be ok. | |
2394 | */ | |
2395 | s->session->time = (long)time(NULL); | |
2396 | ||
aff8c126 RS |
2397 | OPENSSL_free(s->session->ext.tick); |
2398 | s->session->ext.tick = NULL; | |
2399 | s->session->ext.ticklen = 0; | |
e711da71 | 2400 | |
aff8c126 RS |
2401 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2402 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2403 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2404 | goto err; |
2405 | } | |
aff8c126 | 2406 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2407 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2408 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2409 | goto f_err; |
2410 | } | |
e711da71 | 2411 | |
aff8c126 | 2412 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2413 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2414 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2415 | |
2416 | if (SSL_IS_TLS13(s)) { | |
2417 | PACKET extpkt; | |
2418 | ||
2419 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2420 | || !tls_collect_extensions(s, &extpkt, | |
2421 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
fc5ece2e | 2422 | &exts, &al, NULL) |
de1df7e9 MC |
2423 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, |
2424 | exts, NULL, 0, &al)) { | |
2425 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2426 | goto f_err; | |
2427 | } | |
2428 | } | |
2429 | ||
0f113f3e MC |
2430 | /* |
2431 | * There are two ways to detect a resumed ticket session. One is to set | |
2432 | * an appropriate session ID and then the server must return a match in | |
2433 | * ServerHello. This allows the normal client session ID matching to work | |
2434 | * and we know much earlier that the ticket has been accepted. The | |
2435 | * other way is to set zero length session ID when the ticket is | |
2436 | * presented and rely on the handshake to determine session resumption. | |
2437 | * We choose the former approach because this fits in with assumptions | |
2438 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2439 | * SHA256 is disabled) hash of the ticket. | |
2440 | */ | |
ec60ccc1 MC |
2441 | /* |
2442 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2443 | * but s->session->session_id_length is a size_t | |
2444 | */ | |
aff8c126 | 2445 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2446 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2447 | EVP_sha256(), NULL)) { |
2448 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2449 | goto err; | |
2450 | } | |
ec60ccc1 | 2451 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2452 | |
2453 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2454 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2455 | OPENSSL_free(exts); |
de1df7e9 MC |
2456 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2457 | return MSG_PROCESS_FINISHED_READING; | |
2458 | } | |
2459 | ||
b9908bf9 | 2460 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2461 | f_err: |
2462 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2463 | err: | |
fe3a3291 | 2464 | ossl_statem_set_error(s); |
33d93417 | 2465 | OPENSSL_free(exts); |
b9908bf9 | 2466 | return MSG_PROCESS_ERROR; |
0f113f3e | 2467 | } |
67c8e7f4 | 2468 | |
f63e4288 MC |
2469 | /* |
2470 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2471 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2472 | * |*al| is populated with a suitable alert code. | |
2473 | */ | |
2474 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2475 | { |
8b0e934a | 2476 | size_t resplen; |
b9908bf9 | 2477 | unsigned int type; |
b9908bf9 | 2478 | |
73999b62 | 2479 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2480 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2481 | *al = SSL_AD_DECODE_ERROR; |
2482 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2483 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2484 | return 0; | |
0f113f3e | 2485 | } |
56a26ce3 MC |
2486 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2487 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2488 | *al = SSL_AD_DECODE_ERROR; |
2489 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2490 | return 0; | |
0f113f3e | 2491 | } |
8cbfcc70 RS |
2492 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2493 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2494 | *al = SSL_AD_INTERNAL_ERROR; |
2495 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2496 | return 0; | |
0f113f3e | 2497 | } |
8cbfcc70 | 2498 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2499 | *al = SSL_AD_DECODE_ERROR; |
2500 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2501 | return 0; | |
ac63710a | 2502 | } |
8cbfcc70 | 2503 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2504 | |
2505 | return 1; | |
2506 | } | |
2faa1b48 | 2507 | |
f63e4288 MC |
2508 | |
2509 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2510 | { | |
2511 | int al; | |
2512 | ||
2513 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2514 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2515 | ossl_statem_set_error(s); | |
2516 | return MSG_PROCESS_ERROR; | |
2517 | } | |
2518 | ||
b9908bf9 | 2519 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2520 | } |
d02b48c6 | 2521 | |
7776a36c MC |
2522 | /* |
2523 | * Perform miscellaneous checks and processing after we have received the | |
2524 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2525 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2526 | * on failure. | |
7776a36c MC |
2527 | */ |
2528 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2529 | { |
a455d0f6 MC |
2530 | /* |
2531 | * at this point we check that we have the required stuff from | |
2532 | * the server | |
2533 | */ | |
2534 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2535 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2536 | return 0; | |
a455d0f6 MC |
2537 | } |
2538 | ||
bb1aaab4 | 2539 | /* |
aff8c126 RS |
2540 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2541 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2542 | * message, or NULL and -1 otherwise |
2543 | */ | |
aff8c126 RS |
2544 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2545 | && s->ctx->ext.status_cb != NULL) { | |
2546 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2547 | ||
bb1aaab4 | 2548 | if (ret == 0) { |
7776a36c MC |
2549 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2550 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2551 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2552 | return 0; |
bb1aaab4 MC |
2553 | } |
2554 | if (ret < 0) { | |
7776a36c MC |
2555 | *al = SSL_AD_INTERNAL_ERROR; |
2556 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2557 | ERR_R_MALLOC_FAILURE); | |
2558 | return 0; | |
bb1aaab4 MC |
2559 | } |
2560 | } | |
ed29e82a RP |
2561 | #ifndef OPENSSL_NO_CT |
2562 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2563 | /* Note we validate the SCTs whether or not we abort on error */ |
2564 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2565 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2566 | return 0; | |
ed29e82a RP |
2567 | } |
2568 | } | |
2569 | #endif | |
2570 | ||
7776a36c MC |
2571 | return 1; |
2572 | } | |
2573 | ||
2574 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2575 | { | |
2576 | int al = SSL_AD_INTERNAL_ERROR; | |
2577 | ||
2578 | if (PACKET_remaining(pkt) > 0) { | |
2579 | /* should contain no data */ | |
2580 | al = SSL_AD_DECODE_ERROR; | |
2581 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2582 | goto err; | |
2583 | } | |
2584 | #ifndef OPENSSL_NO_SRP | |
2585 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2586 | if (SRP_Calc_A_param(s) <= 0) { | |
2587 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2588 | goto err; | |
2589 | } | |
2590 | } | |
2591 | #endif | |
2592 | ||
2593 | /* | |
2594 | * Error queue messages are generated directly by this function | |
2595 | */ | |
2596 | if (!tls_process_initial_server_flight(s, &al)) | |
2597 | goto err; | |
2598 | ||
473483d4 MC |
2599 | #ifndef OPENSSL_NO_SCTP |
2600 | /* Only applies to renegotiation */ | |
2601 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2602 | && s->renegotiate != 0) |
473483d4 MC |
2603 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2604 | else | |
2605 | #endif | |
2606 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2607 | |
2608 | err: | |
2609 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2610 | ossl_statem_set_error(s); | |
2611 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2612 | } |
176f31dd | 2613 | |
f1ec23c0 | 2614 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2615 | { |
7689082b | 2616 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2617 | int ret = 0; |
2618 | /* | |
2619 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2620 | * \0-terminated identity. The last byte is for us for simulating | |
2621 | * strnlen. | |
2622 | */ | |
2623 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2624 | size_t identitylen = 0; | |
2625 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2626 | unsigned char *tmppsk = NULL; | |
2627 | char *tmpidentity = NULL; | |
2628 | size_t psklen = 0; | |
2629 | ||
2630 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2631 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2632 | *al = SSL_AD_INTERNAL_ERROR; |
2633 | goto err; | |
2634 | } | |
d02b48c6 | 2635 | |
13c0ec4a | 2636 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2637 | |
13c0ec4a MC |
2638 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2639 | identity, sizeof(identity) - 1, | |
2640 | psk, sizeof(psk)); | |
7689082b | 2641 | |
13c0ec4a | 2642 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2643 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2644 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2645 | goto err; | |
2646 | } else if (psklen == 0) { | |
05ec6a25 | 2647 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2648 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2649 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2650 | goto err; | |
2651 | } | |
7689082b | 2652 | |
13c0ec4a MC |
2653 | identitylen = strlen(identity); |
2654 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2655 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2656 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2657 | goto err; | |
2658 | } | |
7689082b | 2659 | |
13c0ec4a MC |
2660 | tmppsk = OPENSSL_memdup(psk, psklen); |
2661 | tmpidentity = OPENSSL_strdup(identity); | |
2662 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2663 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2664 | *al = SSL_AD_INTERNAL_ERROR; |
2665 | goto err; | |
2666 | } | |
7689082b | 2667 | |
13c0ec4a MC |
2668 | OPENSSL_free(s->s3->tmp.psk); |
2669 | s->s3->tmp.psk = tmppsk; | |
2670 | s->s3->tmp.psklen = psklen; | |
2671 | tmppsk = NULL; | |
2672 | OPENSSL_free(s->session->psk_identity); | |
2673 | s->session->psk_identity = tmpidentity; | |
2674 | tmpidentity = NULL; | |
f1ec23c0 | 2675 | |
b2b3024e | 2676 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2677 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2678 | *al = SSL_AD_INTERNAL_ERROR; | |
2679 | goto err; | |
2680 | } | |
7689082b | 2681 | |
13c0ec4a | 2682 | ret = 1; |
0bce0b02 | 2683 | |
13c0ec4a MC |
2684 | err: |
2685 | OPENSSL_cleanse(psk, psklen); | |
2686 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2687 | OPENSSL_clear_free(tmppsk, psklen); | |
2688 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2689 | |
13c0ec4a MC |
2690 | return ret; |
2691 | #else | |
05ec6a25 | 2692 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2693 | *al = SSL_AD_INTERNAL_ERROR; |
2694 | return 0; | |
b9908bf9 | 2695 | #endif |
13c0ec4a | 2696 | } |
b9908bf9 | 2697 | |
f1ec23c0 | 2698 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2699 | { |
bc36ee62 | 2700 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2701 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2702 | EVP_PKEY *pkey = NULL; |
2703 | EVP_PKEY_CTX *pctx = NULL; | |
2704 | size_t enclen; | |
2705 | unsigned char *pms = NULL; | |
2706 | size_t pmslen = 0; | |
b9908bf9 | 2707 | |
13c0ec4a MC |
2708 | if (s->session->peer == NULL) { |
2709 | /* | |
2710 | * We should always have a server certificate with SSL_kRSA. | |
2711 | */ | |
05ec6a25 | 2712 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2713 | return 0; |
2714 | } | |
0f113f3e | 2715 | |
13c0ec4a MC |
2716 | pkey = X509_get0_pubkey(s->session->peer); |
2717 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2718 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2719 | return 0; |
2720 | } | |
0f113f3e | 2721 | |
13c0ec4a MC |
2722 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2723 | pms = OPENSSL_malloc(pmslen); | |
2724 | if (pms == NULL) { | |
05ec6a25 | 2725 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2726 | *al = SSL_AD_INTERNAL_ERROR; |
2727 | return 0; | |
2728 | } | |
0bce0b02 | 2729 | |
13c0ec4a MC |
2730 | pms[0] = s->client_version >> 8; |
2731 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2732 | /* TODO(size_t): Convert this function */ |
2733 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2734 | goto err; |
2735 | } | |
0f113f3e | 2736 | |
13c0ec4a | 2737 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2738 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2739 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2740 | goto err; | |
2741 | } | |
13c0ec4a MC |
2742 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2743 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2744 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2745 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2746 | goto err; |
2747 | } | |
f1ec23c0 MC |
2748 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2749 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2750 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2751 | goto err; |
2752 | } | |
13c0ec4a MC |
2753 | EVP_PKEY_CTX_free(pctx); |
2754 | pctx = NULL; | |
0f113f3e | 2755 | |
13c0ec4a | 2756 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2757 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2758 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2759 | goto err; | |
b9908bf9 | 2760 | } |
13c0ec4a MC |
2761 | |
2762 | s->s3->tmp.pms = pms; | |
2763 | s->s3->tmp.pmslen = pmslen; | |
2764 | ||
2faa1b48 CB |
2765 | /* Log the premaster secret, if logging is enabled. */ |
2766 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2767 | goto err; | |
2768 | ||
13c0ec4a MC |
2769 | return 1; |
2770 | err: | |
2771 | OPENSSL_clear_free(pms, pmslen); | |
2772 | EVP_PKEY_CTX_free(pctx); | |
2773 | ||
2774 | return 0; | |
2775 | #else | |
05ec6a25 | 2776 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2777 | *al = SSL_AD_INTERNAL_ERROR; |
2778 | return 0; | |
f9b3bff6 | 2779 | #endif |
13c0ec4a MC |
2780 | } |
2781 | ||
f1ec23c0 | 2782 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2783 | { |
2784 | #ifndef OPENSSL_NO_DH | |
2785 | DH *dh_clnt = NULL; | |
2786 | const BIGNUM *pub_key; | |
2787 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2788 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2789 | |
2790 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2791 | if (skey == NULL) |
2792 | goto err; | |
2793 | ||
0a699a07 | 2794 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2795 | if (ckey == NULL) |
2796 | goto err; | |
2797 | ||
a8c1c704 MC |
2798 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2799 | ||
0f1e51ea | 2800 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2801 | goto err; |
a8c1c704 MC |
2802 | |
2803 | /* send off the data */ | |
2804 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2805 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2806 | goto err; |
2807 | ||
2808 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2809 | EVP_PKEY_free(ckey); |
2810 | ||
2811 | return 1; | |
f1ec23c0 MC |
2812 | err: |
2813 | EVP_PKEY_free(ckey); | |
2814 | #endif | |
05ec6a25 | 2815 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2816 | *al = SSL_AD_INTERNAL_ERROR; |
2817 | return 0; | |
a8c1c704 MC |
2818 | } |
2819 | ||
f1ec23c0 | 2820 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2821 | { |
2822 | #ifndef OPENSSL_NO_EC | |
2823 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2824 | size_t encoded_pt_len = 0; |
67ad5aab | 2825 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2826 | int ret = 0; |
67ad5aab MC |
2827 | |
2828 | skey = s->s3->peer_tmp; | |
ec24630a | 2829 | if (skey == NULL) { |
05ec6a25 | 2830 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2831 | return 0; |
2832 | } | |
2833 | ||
0a699a07 | 2834 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2835 | if (ckey == NULL) { |
2836 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2837 | goto err; | |
2838 | } | |
67ad5aab | 2839 | |
0f1e51ea | 2840 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2841 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2842 | goto err; |
2843 | } | |
2844 | ||
2845 | /* Generate encoding of client key */ | |
ec24630a | 2846 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2847 | |
2848 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2849 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2850 | goto err; |
2851 | } | |
2852 | ||
b2b3024e | 2853 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2854 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2855 | goto err; | |
2856 | } | |
67ad5aab | 2857 | |
f1ec23c0 | 2858 | ret = 1; |
67ad5aab | 2859 | err: |
f1ec23c0 | 2860 | OPENSSL_free(encodedPoint); |
67ad5aab | 2861 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2862 | return ret; |
67ad5aab | 2863 | #else |
05ec6a25 | 2864 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2865 | *al = SSL_AD_INTERNAL_ERROR; |
2866 | return 0; | |
2867 | #endif | |
2868 | } | |
2869 | ||
f1ec23c0 | 2870 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2871 | { |
2872 | #ifndef OPENSSL_NO_GOST | |
2873 | /* GOST key exchange message creation */ | |
2874 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2875 | X509 *peer_cert; | |
2876 | size_t msglen; | |
2877 | unsigned int md_len; | |
2878 | unsigned char shared_ukm[32], tmp[256]; | |
2879 | EVP_MD_CTX *ukm_hash = NULL; | |
2880 | int dgst_nid = NID_id_GostR3411_94; | |
2881 | unsigned char *pms = NULL; | |
2882 | size_t pmslen = 0; | |
2883 | ||
2884 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2885 | dgst_nid = NID_id_GostR3411_2012_256; | |
2886 | ||
2887 | /* | |
2888 | * Get server sertificate PKEY and create ctx from it | |
2889 | */ | |
2890 | peer_cert = s->session->peer; | |
2891 | if (!peer_cert) { | |
2892 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2893 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2894 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2895 | return 0; | |
2896 | } | |
2897 | ||
2898 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2899 | if (pkey_ctx == NULL) { | |
2900 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2901 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2902 | return 0; |
2903 | } | |
2904 | /* | |
2905 | * If we have send a certificate, and certificate key | |
2906 | * parameters match those of server certificate, use | |
2907 | * certificate key for key exchange | |
2908 | */ | |
2909 | ||
2910 | /* Otherwise, generate ephemeral key pair */ | |
2911 | pmslen = 32; | |
2912 | pms = OPENSSL_malloc(pmslen); | |
2913 | if (pms == NULL) { | |
2914 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2915 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2916 | goto err; |
e00e0b3d MC |
2917 | } |
2918 | ||
2919 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2920 | /* Generate session key |
2921 | * TODO(size_t): Convert this function | |
2922 | */ | |
2923 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2924 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2925 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2926 | goto err; |
2927 | }; | |
e00e0b3d MC |
2928 | /* |
2929 | * Compute shared IV and store it in algorithm-specific context | |
2930 | * data | |
2931 | */ | |
2932 | ukm_hash = EVP_MD_CTX_new(); | |
2933 | if (ukm_hash == NULL | |
a230b26e EK |
2934 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2935 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2936 | SSL3_RANDOM_SIZE) <= 0 | |
2937 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2938 | SSL3_RANDOM_SIZE) <= 0 | |
2939 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2940 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2941 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2942 | goto err; |
2943 | } | |
2944 | EVP_MD_CTX_free(ukm_hash); | |
2945 | ukm_hash = NULL; | |
2946 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2947 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2948 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2949 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2950 | goto err; |
2951 | } | |
2952 | /* Make GOST keytransport blob message */ | |
2953 | /* | |
2954 | * Encapsulate it into sequence | |
2955 | */ | |
e00e0b3d MC |
2956 | msglen = 255; |
2957 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2958 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2959 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2960 | goto err; |
2961 | } | |
f1ec23c0 | 2962 | |
08029dfa MC |
2963 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2964 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2965 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2966 | *al = SSL_AD_INTERNAL_ERROR; |
2967 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2968 | goto err; | |
e00e0b3d | 2969 | } |
f1ec23c0 | 2970 | |
e00e0b3d MC |
2971 | EVP_PKEY_CTX_free(pkey_ctx); |
2972 | s->s3->tmp.pms = pms; | |
2973 | s->s3->tmp.pmslen = pmslen; | |
2974 | ||
2975 | return 1; | |
2976 | err: | |
2977 | EVP_PKEY_CTX_free(pkey_ctx); | |
2978 | OPENSSL_clear_free(pms, pmslen); | |
2979 | EVP_MD_CTX_free(ukm_hash); | |
2980 | return 0; | |
2981 | #else | |
05ec6a25 | 2982 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2983 | *al = SSL_AD_INTERNAL_ERROR; |
2984 | return 0; | |
2985 | #endif | |
2986 | } | |
2987 | ||
f1ec23c0 | 2988 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2989 | { |
8b9546c7 | 2990 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2991 | unsigned char *abytes = NULL; |
2992 | ||
2993 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2994 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2995 | &abytes)) { | |
05ec6a25 | 2996 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2997 | return 0; |
2998 | } | |
f1ec23c0 MC |
2999 | BN_bn2bin(s->srp_ctx.A, abytes); |
3000 | ||
840a2bf8 MC |
3001 | OPENSSL_free(s->session->srp_username); |
3002 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3003 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3004 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3005 | return 0; |
3006 | } | |
3007 | ||
3008 | return 1; | |
3009 | #else | |
05ec6a25 | 3010 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3011 | *al = SSL_AD_INTERNAL_ERROR; |
3012 | return 0; | |
3013 | #endif | |
3014 | } | |
3015 | ||
7cea05dc | 3016 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3017 | { |
13c0ec4a MC |
3018 | unsigned long alg_k; |
3019 | int al = -1; | |
3020 | ||
f1ec23c0 | 3021 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3022 | |
13c0ec4a | 3023 | if ((alg_k & SSL_PSK) |
7cea05dc | 3024 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3025 | goto err; |
3026 | ||
f1ec23c0 | 3027 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3028 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3029 | goto err; |
a8c1c704 | 3030 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3031 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3032 | goto err; |
67ad5aab | 3033 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3034 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3035 | goto err; |
e00e0b3d | 3036 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3037 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3038 | goto err; |
840a2bf8 | 3039 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3040 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3041 | goto err; |
4a424545 | 3042 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3043 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3044 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3045 | goto err; | |
3046 | } | |
3047 | ||
b9908bf9 | 3048 | return 1; |
0f113f3e | 3049 | err: |
13c0ec4a MC |
3050 | if (al != -1) |
3051 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3052 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3053 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3054 | #ifndef OPENSSL_NO_PSK |
3055 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3056 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3057 | #endif |
b9908bf9 MC |
3058 | return 0; |
3059 | } | |
3060 | ||
3061 | int tls_client_key_exchange_post_work(SSL *s) | |
3062 | { | |
3063 | unsigned char *pms = NULL; | |
3064 | size_t pmslen = 0; | |
3065 | ||
6f137370 MC |
3066 | pms = s->s3->tmp.pms; |
3067 | pmslen = s->s3->tmp.pmslen; | |
3068 | ||
b9908bf9 MC |
3069 | #ifndef OPENSSL_NO_SRP |
3070 | /* Check for SRP */ | |
3071 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3072 | if (!srp_generate_client_master_secret(s)) { | |
3073 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3074 | ERR_R_INTERNAL_ERROR); | |
3075 | goto err; | |
3076 | } | |
3077 | return 1; | |
3078 | } | |
3079 | #endif | |
b9908bf9 MC |
3080 | |
3081 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3082 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3083 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3084 | goto err; | |
3085 | } | |
3086 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3087 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3088 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3089 | /* ssl_generate_master_secret frees the pms even on error */ |
3090 | pms = NULL; | |
3091 | pmslen = 0; | |
b9908bf9 MC |
3092 | goto err; |
3093 | } | |
6f137370 MC |
3094 | pms = NULL; |
3095 | pmslen = 0; | |
473483d4 MC |
3096 | |
3097 | #ifndef OPENSSL_NO_SCTP | |
3098 | if (SSL_IS_DTLS(s)) { | |
3099 | unsigned char sctpauthkey[64]; | |
3100 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3101 | ||
3102 | /* | |
3103 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3104 | * used. | |
3105 | */ | |
141eb8c6 MC |
3106 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3107 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3108 | |
3109 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3110 | sizeof(sctpauthkey), labelbuffer, |
3111 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3112 | goto err; |
3113 | ||
3114 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3115 | sizeof(sctpauthkey), sctpauthkey); | |
3116 | } | |
3117 | #endif | |
3118 | ||
b9908bf9 MC |
3119 | return 1; |
3120 | err: | |
3121 | OPENSSL_clear_free(pms, pmslen); | |
3122 | s->s3->tmp.pms = NULL; | |
3123 | return 0; | |
0f113f3e | 3124 | } |
d02b48c6 | 3125 | |
0f113f3e MC |
3126 | /* |
3127 | * Check a certificate can be used for client authentication. Currently check | |
3128 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3129 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3130 | */ |
3131 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3132 | { |
0f113f3e | 3133 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3134 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3135 | return 0; |
3136 | /* | |
3137 | * If strict mode check suitability of chain before using it. This also | |
3138 | * adjusts suite B digest if necessary. | |
3139 | */ | |
3140 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3141 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3142 | return 0; | |
0f113f3e MC |
3143 | return 1; |
3144 | } | |
0d609395 | 3145 | |
be3583fa | 3146 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3147 | { |
3148 | X509 *x509 = NULL; | |
3149 | EVP_PKEY *pkey = NULL; | |
3150 | int i; | |
3151 | ||
b9908bf9 | 3152 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3153 | /* Let cert callback update client certificates if required */ |
3154 | if (s->cert->cert_cb) { | |
3155 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3156 | if (i < 0) { | |
3157 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3158 | return WORK_MORE_A; |
0f113f3e MC |
3159 | } |
3160 | if (i == 0) { | |
3161 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3162 | ossl_statem_set_error(s); |
0f113f3e MC |
3163 | return 0; |
3164 | } | |
3165 | s->rwstate = SSL_NOTHING; | |
3166 | } | |
3167 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3168 | return WORK_FINISHED_CONTINUE; |
3169 | ||
3170 | /* Fall through to WORK_MORE_B */ | |
3171 | wst = WORK_MORE_B; | |
0f113f3e MC |
3172 | } |
3173 | ||
3174 | /* We need to get a client cert */ | |
b9908bf9 | 3175 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3176 | /* |
3177 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3178 | * return(-1); We then get retied later | |
3179 | */ | |
0f113f3e MC |
3180 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3181 | if (i < 0) { | |
3182 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3183 | return WORK_MORE_B; |
0f113f3e MC |
3184 | } |
3185 | s->rwstate = SSL_NOTHING; | |
3186 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3187 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3188 | i = 0; | |
3189 | } else if (i == 1) { | |
3190 | i = 0; | |
b9908bf9 | 3191 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3192 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3193 | } | |
3194 | ||
222561fe | 3195 | X509_free(x509); |
25aaa98a | 3196 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3197 | if (i && !ssl3_check_client_certificate(s)) |
3198 | i = 0; | |
3199 | if (i == 0) { | |
3200 | if (s->version == SSL3_VERSION) { | |
3201 | s->s3->tmp.cert_req = 0; | |
3202 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3203 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3204 | } else { |
3205 | s->s3->tmp.cert_req = 2; | |
124037fd | 3206 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3207 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3208 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3209 | return 0; |
3210 | } | |
0f113f3e MC |
3211 | } |
3212 | } | |
3213 | ||
b9908bf9 | 3214 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3215 | } |
3216 | ||
b9908bf9 MC |
3217 | /* Shouldn't ever get here */ |
3218 | return WORK_ERROR; | |
3219 | } | |
3220 | ||
7cea05dc | 3221 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3222 | { |
0baed5e9 | 3223 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3224 | |
3225 | /* | |
3226 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3227 | * later | |
3228 | */ | |
3229 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3230 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3231 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3232 | : s->cert->key, |
3233 | &al)) { | |
b9908bf9 | 3234 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3235 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3236 | return 0; |
0f113f3e | 3237 | } |
b9908bf9 MC |
3238 | |
3239 | return 1; | |
0f113f3e MC |
3240 | } |
3241 | ||
3242 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3243 | |
36d16f8e | 3244 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3245 | { |
60f43e9e RL |
3246 | int i; |
3247 | #ifndef OPENSSL_NO_EC | |
3248 | int idx; | |
3249 | #endif | |
0f113f3e MC |
3250 | long alg_k, alg_a; |
3251 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3252 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3253 | |
0f113f3e MC |
3254 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3255 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3256 | |
0f113f3e | 3257 | /* we don't have a certificate */ |
55a9a16f | 3258 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3259 | return (1); |
d02b48c6 | 3260 | |
0f113f3e | 3261 | /* This is the passed certificate */ |
d02b48c6 | 3262 | |
10bf4fc2 | 3263 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3264 | idx = s->session->peer_type; |
0f113f3e | 3265 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3266 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3267 | /* check failed */ |
3268 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3269 | goto f_err; | |
3270 | } else { | |
3271 | return 1; | |
3272 | } | |
3273 | } else if (alg_a & SSL_aECDSA) { | |
3274 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3275 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3276 | goto f_err; | |
0f113f3e MC |
3277 | } |
3278 | #endif | |
8382fd3a | 3279 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3280 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3281 | |
3282 | /* Check that we have a certificate if we require one */ | |
3283 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3284 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3285 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3286 | goto f_err; | |
3287 | } | |
bc36ee62 | 3288 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3289 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3290 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3291 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3292 | goto f_err; | |
3293 | } | |
d02b48c6 | 3294 | #endif |
bc36ee62 | 3295 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3296 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3297 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3298 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3299 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3300 | goto f_err; | |
0f113f3e | 3301 | } |
79df9d62 | 3302 | #endif |
bc36ee62 | 3303 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3304 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3305 | al = SSL_AD_INTERNAL_ERROR; |
3306 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3307 | goto f_err; |
0f113f3e | 3308 | } |
d02b48c6 RE |
3309 | #endif |
3310 | ||
0f113f3e MC |
3311 | return (1); |
3312 | f_err: | |
26c79d56 | 3313 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3314 | return (0); |
3315 | } | |
3316 | ||
e481f9b9 | 3317 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3318 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3319 | { |
15e6be6c MC |
3320 | size_t len, padding_len; |
3321 | unsigned char *padding = NULL; | |
15e6be6c | 3322 | |
aff8c126 | 3323 | len = s->ext.npn_len; |
b9908bf9 | 3324 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3325 | |
aff8c126 | 3326 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3327 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3328 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3329 | goto err; | |
3330 | } | |
3331 | ||
3332 | memset(padding, 0, padding_len); | |
3333 | ||
b9908bf9 | 3334 | return 1; |
15e6be6c | 3335 | err: |
15e6be6c MC |
3336 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3337 | return 0; | |
b9908bf9 | 3338 | } |
6434abbf | 3339 | #endif |
368888bc | 3340 | |
c7f47786 MC |
3341 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3342 | { | |
3343 | if (PACKET_remaining(pkt) > 0) { | |
3344 | /* should contain no data */ | |
3345 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3346 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3347 | ossl_statem_set_error(s); | |
3348 | return MSG_PROCESS_ERROR; | |
3349 | } | |
3350 | ||
3351 | /* | |
1f04f23e MC |
3352 | * This is a historical discrepancy (not in the RFC) maintained for |
3353 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3354 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3355 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3356 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3357 | */ |
3358 | if (SSL_IS_DTLS(s)) | |
3359 | SSL_renegotiate(s); | |
3360 | else | |
3361 | SSL_renegotiate_abbreviated(s); | |
3362 | ||
3363 | return MSG_PROCESS_FINISHED_READING; | |
3364 | } | |
3365 | ||
e46f2334 MC |
3366 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3367 | { | |
3368 | int al = SSL_AD_INTERNAL_ERROR; | |
3369 | PACKET extensions; | |
3434f40b | 3370 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3371 | |
e46f2334 MC |
3372 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3373 | al = SSL_AD_DECODE_ERROR; | |
3374 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3375 | goto err; | |
3376 | } | |
3377 | ||
e96e0f8e | 3378 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
fc5ece2e | 3379 | &rawexts, &al, NULL) |
e96e0f8e | 3380 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3381 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3382 | goto err; |
3383 | ||
1b0286a3 | 3384 | OPENSSL_free(rawexts); |
e46f2334 MC |
3385 | return MSG_PROCESS_CONTINUE_READING; |
3386 | ||
3387 | err: | |
3388 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3389 | ossl_statem_set_error(s); | |
1b0286a3 | 3390 | OPENSSL_free(rawexts); |
e46f2334 MC |
3391 | return MSG_PROCESS_ERROR; |
3392 | } | |
3393 | ||
368888bc | 3394 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3395 | { |
3396 | int i = 0; | |
368888bc | 3397 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3398 | if (s->ctx->client_cert_engine) { |
3399 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3400 | SSL_get_client_CA_list(s), | |
3401 | px509, ppkey, NULL, NULL, NULL); | |
3402 | if (i != 0) | |
3403 | return i; | |
3404 | } | |
3405 | #endif | |
3406 | if (s->ctx->client_cert_cb) | |
3407 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3408 | return i; | |
3409 | } | |
d45ba43d | 3410 | |
ae2f7b37 | 3411 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3412 | { |
2c7b4dbc MC |
3413 | int i; |
3414 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3415 | int empty_reneg_info_scsv = !s->renegotiate; |
3416 | /* Set disabled masks for this session */ | |
3417 | ssl_set_client_disabled(s); | |
3418 | ||
3419 | if (sk == NULL) | |
3420 | return (0); | |
d45ba43d | 3421 | |
2c7b4dbc MC |
3422 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3423 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3424 | # error Max cipher length too short | |
3425 | # endif | |
3426 | /* | |
3427 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3428 | * chop number of supported ciphers to keep it well below this if we | |
3429 | * use TLS v1.2 | |
3430 | */ | |
3431 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3432 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3433 | else | |
3434 | #endif | |
3435 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3436 | maxlen = 0xfffe; | |
3437 | ||
3438 | if (empty_reneg_info_scsv) | |
3439 | maxlen -= 2; | |
3440 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3441 | maxlen -= 2; | |
3442 | ||
3443 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3444 | const SSL_CIPHER *c; | |
3445 | ||
d45ba43d MC |
3446 | c = sk_SSL_CIPHER_value(sk, i); |
3447 | /* Skip disabled ciphers */ | |
3448 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3449 | continue; | |
2c7b4dbc MC |
3450 | |
3451 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3452 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3453 | return 0; | |
3454 | } | |
3455 | ||
3456 | totlen += len; | |
d45ba43d | 3457 | } |
2c7b4dbc MC |
3458 | |
3459 | if (totlen == 0) { | |
3460 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3461 | return 0; | |
3462 | } | |
3463 | ||
3464 | if (totlen != 0) { | |
d45ba43d MC |
3465 | if (empty_reneg_info_scsv) { |
3466 | static SSL_CIPHER scsv = { | |
3467 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3468 | }; | |
2c7b4dbc MC |
3469 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3470 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3471 | return 0; | |
3472 | } | |
d45ba43d MC |
3473 | } |
3474 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3475 | static SSL_CIPHER scsv = { | |
3476 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3477 | }; | |
2c7b4dbc MC |
3478 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3479 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3480 | return 0; | |
3481 | } | |
d45ba43d MC |
3482 | } |
3483 | } | |
3484 | ||
2c7b4dbc | 3485 | return 1; |
d45ba43d | 3486 | } |