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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. | |
2c5dfdc3 MC |
652 | case TLS_ST_SR_CERT_VRFY: |
653 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 654 | */ |
8481f583 | 655 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 656 | { |
d6f1a6e9 | 657 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
658 | |
659 | s->init_num = 0; | |
660 | ||
a230b26e | 661 | switch (st->hand_state) { |
f3b3d7f0 RS |
662 | default: |
663 | /* No post work to be done */ | |
664 | break; | |
665 | ||
61ae935a | 666 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 667 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 668 | return WORK_MORE_A; |
46417569 | 669 | |
61ae935a MC |
670 | if (SSL_IS_DTLS(s)) { |
671 | /* Treat the next message as the first packet */ | |
672 | s->first_packet = 1; | |
673 | } | |
674 | break; | |
675 | ||
676 | case TLS_ST_CW_KEY_EXCH: | |
677 | if (tls_client_key_exchange_post_work(s) == 0) | |
678 | return WORK_ERROR; | |
679 | break; | |
680 | ||
681 | case TLS_ST_CW_CHANGE: | |
682 | s->session->cipher = s->s3->tmp.new_cipher; | |
683 | #ifdef OPENSSL_NO_COMP | |
684 | s->session->compress_meth = 0; | |
685 | #else | |
686 | if (s->s3->tmp.new_compression == NULL) | |
687 | s->session->compress_meth = 0; | |
688 | else | |
689 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
690 | #endif | |
691 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
692 | return WORK_ERROR; | |
693 | ||
694 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
695 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
696 | return WORK_ERROR; | |
697 | ||
698 | if (SSL_IS_DTLS(s)) { | |
699 | #ifndef OPENSSL_NO_SCTP | |
700 | if (s->hit) { | |
701 | /* | |
702 | * Change to new shared key of SCTP-Auth, will be ignored if | |
703 | * no SCTP used. | |
704 | */ | |
705 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
706 | 0, NULL); | |
707 | } | |
708 | #endif | |
709 | ||
710 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
711 | } | |
712 | break; | |
713 | ||
714 | case TLS_ST_CW_FINISHED: | |
715 | #ifndef OPENSSL_NO_SCTP | |
716 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
717 | /* | |
718 | * Change to new shared key of SCTP-Auth, will be ignored if | |
719 | * no SCTP used. | |
720 | */ | |
721 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
722 | 0, NULL); | |
723 | } | |
724 | #endif | |
725 | if (statem_flush(s) != 1) | |
726 | return WORK_MORE_B; | |
92760c21 MC |
727 | |
728 | if (SSL_IS_TLS13(s)) { | |
729 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
730 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
731 | return WORK_ERROR; | |
732 | } | |
61ae935a | 733 | break; |
9412b3ad MC |
734 | |
735 | case TLS_ST_CW_KEY_UPDATE: | |
736 | if (statem_flush(s) != 1) | |
737 | return WORK_MORE_A; | |
57389a32 MC |
738 | if (!tls13_update_key(s, 1)) |
739 | return WORK_ERROR; | |
9412b3ad | 740 | break; |
61ae935a MC |
741 | } |
742 | ||
743 | return WORK_FINISHED_CONTINUE; | |
744 | } | |
745 | ||
746 | /* | |
6392fb8e MC |
747 | * Get the message construction function and message type for sending from the |
748 | * client | |
61ae935a MC |
749 | * |
750 | * Valid return values are: | |
751 | * 1: Success | |
752 | * 0: Error | |
753 | */ | |
6392fb8e | 754 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 755 | confunc_f *confunc, int *mt) |
61ae935a | 756 | { |
d6f1a6e9 | 757 | OSSL_STATEM *st = &s->statem; |
61ae935a | 758 | |
4a01c59f MC |
759 | switch (st->hand_state) { |
760 | default: | |
761 | /* Shouldn't happen */ | |
762 | return 0; | |
763 | ||
764 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 765 | if (SSL_IS_DTLS(s)) |
6392fb8e | 766 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 767 | else |
6392fb8e MC |
768 | *confunc = tls_construct_change_cipher_spec; |
769 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
770 | break; |
771 | ||
772 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
773 | *confunc = tls_construct_client_hello; |
774 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
775 | break; |
776 | ||
777 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
778 | *confunc = tls_construct_client_certificate; |
779 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
780 | break; |
781 | ||
782 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
783 | *confunc = tls_construct_client_key_exchange; |
784 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
785 | break; |
786 | ||
787 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 788 | *confunc = tls_construct_cert_verify; |
6392fb8e | 789 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 790 | break; |
61ae935a MC |
791 | |
792 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 793 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
794 | *confunc = tls_construct_next_proto; |
795 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 796 | break; |
61ae935a | 797 | #endif |
4a01c59f | 798 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
799 | *confunc = tls_construct_finished; |
800 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 801 | break; |
9412b3ad MC |
802 | |
803 | case TLS_ST_CW_KEY_UPDATE: | |
804 | *confunc = tls_construct_key_update; | |
805 | *mt = SSL3_MT_KEY_UPDATE; | |
806 | break; | |
4a01c59f | 807 | } |
5923ad4b | 808 | |
5923ad4b | 809 | return 1; |
61ae935a MC |
810 | } |
811 | ||
812 | /* | |
813 | * Returns the maximum allowed length for the current message that we are | |
814 | * reading. Excludes the message header. | |
815 | */ | |
eda75751 | 816 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 817 | { |
d6f1a6e9 | 818 | OSSL_STATEM *st = &s->statem; |
61ae935a | 819 | |
a230b26e | 820 | switch (st->hand_state) { |
f3b3d7f0 RS |
821 | default: |
822 | /* Shouldn't happen */ | |
823 | return 0; | |
824 | ||
a230b26e EK |
825 | case TLS_ST_CR_SRVR_HELLO: |
826 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 827 | |
a230b26e EK |
828 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
829 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 830 | |
3847d426 MC |
831 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
832 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
833 | ||
a230b26e EK |
834 | case TLS_ST_CR_CERT: |
835 | return s->max_cert_list; | |
61ae935a | 836 | |
2c5dfdc3 MC |
837 | case TLS_ST_CR_CERT_VRFY: |
838 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
839 | ||
a230b26e EK |
840 | case TLS_ST_CR_CERT_STATUS: |
841 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 842 | |
a230b26e EK |
843 | case TLS_ST_CR_KEY_EXCH: |
844 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 845 | |
a230b26e EK |
846 | case TLS_ST_CR_CERT_REQ: |
847 | /* | |
848 | * Set to s->max_cert_list for compatibility with previous releases. In | |
849 | * practice these messages can get quite long if servers are configured | |
850 | * to provide a long list of acceptable CAs | |
851 | */ | |
852 | return s->max_cert_list; | |
61ae935a | 853 | |
a230b26e EK |
854 | case TLS_ST_CR_SRVR_DONE: |
855 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 856 | |
a230b26e EK |
857 | case TLS_ST_CR_CHANGE: |
858 | if (s->version == DTLS1_BAD_VER) | |
859 | return 3; | |
860 | return CCS_MAX_LENGTH; | |
61ae935a | 861 | |
a230b26e EK |
862 | case TLS_ST_CR_SESSION_TICKET: |
863 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 864 | |
a230b26e EK |
865 | case TLS_ST_CR_FINISHED: |
866 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
867 | |
868 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
869 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
870 | |
871 | case TLS_ST_CR_KEY_UPDATE: | |
872 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 873 | } |
61ae935a MC |
874 | } |
875 | ||
876 | /* | |
877 | * Process a message that the client has been received from the server. | |
878 | */ | |
8481f583 | 879 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 880 | { |
d6f1a6e9 | 881 | OSSL_STATEM *st = &s->statem; |
61ae935a | 882 | |
a230b26e | 883 | switch (st->hand_state) { |
f3b3d7f0 RS |
884 | default: |
885 | /* Shouldn't happen */ | |
886 | return MSG_PROCESS_ERROR; | |
887 | ||
a230b26e EK |
888 | case TLS_ST_CR_SRVR_HELLO: |
889 | return tls_process_server_hello(s, pkt); | |
61ae935a | 890 | |
a230b26e EK |
891 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
892 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 893 | |
3847d426 MC |
894 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
895 | return tls_process_hello_retry_request(s, pkt); | |
896 | ||
a230b26e EK |
897 | case TLS_ST_CR_CERT: |
898 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 899 | |
2c5dfdc3 MC |
900 | case TLS_ST_CR_CERT_VRFY: |
901 | return tls_process_cert_verify(s, pkt); | |
902 | ||
a230b26e EK |
903 | case TLS_ST_CR_CERT_STATUS: |
904 | return tls_process_cert_status(s, pkt); | |
61ae935a | 905 | |
a230b26e EK |
906 | case TLS_ST_CR_KEY_EXCH: |
907 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 908 | |
a230b26e EK |
909 | case TLS_ST_CR_CERT_REQ: |
910 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 911 | |
a230b26e EK |
912 | case TLS_ST_CR_SRVR_DONE: |
913 | return tls_process_server_done(s, pkt); | |
61ae935a | 914 | |
a230b26e EK |
915 | case TLS_ST_CR_CHANGE: |
916 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 917 | |
a230b26e EK |
918 | case TLS_ST_CR_SESSION_TICKET: |
919 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 920 | |
a230b26e EK |
921 | case TLS_ST_CR_FINISHED: |
922 | return tls_process_finished(s, pkt); | |
e46f2334 | 923 | |
c7f47786 MC |
924 | case TLS_ST_CR_HELLO_REQ: |
925 | return tls_process_hello_req(s, pkt); | |
926 | ||
e46f2334 MC |
927 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
928 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
929 | |
930 | case TLS_ST_CR_KEY_UPDATE: | |
931 | return tls_process_key_update(s, pkt); | |
61ae935a | 932 | } |
61ae935a MC |
933 | } |
934 | ||
935 | /* | |
936 | * Perform any further processing required following the receipt of a message | |
937 | * from the server | |
938 | */ | |
8481f583 | 939 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 940 | { |
d6f1a6e9 | 941 | OSSL_STATEM *st = &s->statem; |
61ae935a | 942 | |
a230b26e | 943 | switch (st->hand_state) { |
f3b3d7f0 RS |
944 | default: |
945 | /* Shouldn't happen */ | |
946 | return WORK_ERROR; | |
947 | ||
05c4f1d5 MC |
948 | case TLS_ST_CR_CERT_REQ: |
949 | return tls_prepare_client_certificate(s, wst); | |
950 | ||
61ae935a MC |
951 | #ifndef OPENSSL_NO_SCTP |
952 | case TLS_ST_CR_SRVR_DONE: | |
953 | /* We only get here if we are using SCTP and we are renegotiating */ | |
954 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
955 | s->s3->in_read_app_data = 2; | |
956 | s->rwstate = SSL_READING; | |
957 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
958 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 959 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
960 | return WORK_MORE_A; |
961 | } | |
fe3a3291 | 962 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
963 | return WORK_FINISHED_STOP; |
964 | #endif | |
61ae935a | 965 | } |
61ae935a MC |
966 | } |
967 | ||
7cea05dc | 968 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 969 | { |
2c7b4dbc | 970 | unsigned char *p; |
ec60ccc1 MC |
971 | size_t sess_id_len; |
972 | int i, protverr; | |
2c7b4dbc | 973 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 974 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
975 | SSL_COMP *comp; |
976 | #endif | |
b9908bf9 | 977 | SSL_SESSION *sess = s->session; |
0f113f3e | 978 | |
7cea05dc | 979 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
980 | /* Should not happen */ |
981 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 982 | return 0; |
2c7b4dbc | 983 | } |
0f113f3e | 984 | |
b9908bf9 | 985 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
986 | protverr = ssl_set_client_hello_version(s); |
987 | if (protverr != 0) { | |
988 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 989 | return 0; |
4fa52141 | 990 | } |
0f113f3e | 991 | |
a230b26e | 992 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 993 | /* |
b9908bf9 MC |
994 | * In the case of EAP-FAST, we can have a pre-shared |
995 | * "ticket" without a session ID. | |
0f113f3e | 996 | */ |
aff8c126 | 997 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
998 | (sess->not_resumable)) { |
999 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1000 | return 0; |
b9908bf9 MC |
1001 | } |
1002 | /* else use the pre-loaded session */ | |
0f113f3e | 1003 | |
c7f47786 MC |
1004 | /* This is a real handshake so make sure we clean it up at the end */ |
1005 | s->statem.cleanuphand = 1; | |
1006 | ||
b9908bf9 | 1007 | p = s->s3->client_random; |
0f113f3e | 1008 | |
b9908bf9 MC |
1009 | /* |
1010 | * for DTLS if client_random is initialized, reuse it, we are | |
1011 | * required to use same upon reply to HelloVerify | |
1012 | */ | |
1013 | if (SSL_IS_DTLS(s)) { | |
1014 | size_t idx; | |
1015 | i = 1; | |
1016 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1017 | if (p[idx]) { | |
1018 | i = 0; | |
1019 | break; | |
0f113f3e | 1020 | } |
0f113f3e | 1021 | } |
b9908bf9 MC |
1022 | } else |
1023 | i = 1; | |
0f113f3e | 1024 | |
a230b26e | 1025 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1026 | return 0; |
b9908bf9 | 1027 | |
b9908bf9 MC |
1028 | /*- |
1029 | * version indicates the negotiated version: for example from | |
1030 | * an SSLv2/v3 compatible client hello). The client_version | |
1031 | * field is the maximum version we permit and it is also | |
1032 | * used in RSA encrypted premaster secrets. Some servers can | |
1033 | * choke if we initially report a higher version then | |
1034 | * renegotiate to a lower one in the premaster secret. This | |
1035 | * didn't happen with TLS 1.0 as most servers supported it | |
1036 | * but it can with TLS 1.1 or later if the server only supports | |
1037 | * 1.0. | |
1038 | * | |
1039 | * Possible scenario with previous logic: | |
1040 | * 1. Client hello indicates TLS 1.2 | |
1041 | * 2. Server hello says TLS 1.0 | |
1042 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1043 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1044 | * 5. Server sends hello request to renegotiate. |
1045 | * 6. Client hello indicates TLS v1.0 as we now | |
1046 | * know that is maximum server supports. | |
1047 | * 7. Server chokes on RSA encrypted premaster secret | |
1048 | * containing version 1.0. | |
1049 | * | |
1050 | * For interoperability it should be OK to always use the | |
1051 | * maximum version we support in client hello and then rely | |
1052 | * on the checking of version to ensure the servers isn't | |
1053 | * being inconsistent: for example initially negotiating with | |
1054 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1055 | * client_version in client hello and not resetting it to | |
1056 | * the negotiated version. | |
cd998837 MC |
1057 | * |
1058 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1059 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1060 | */ |
7acb8b64 | 1061 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1062 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1063 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1064 | return 0; |
2c7b4dbc | 1065 | } |
b9908bf9 MC |
1066 | |
1067 | /* Session ID */ | |
f05bcf0f | 1068 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1069 | sess_id_len = 0; |
b9908bf9 | 1070 | else |
ec60ccc1 MC |
1071 | sess_id_len = s->session->session_id_length; |
1072 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1073 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1074 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1075 | sess_id_len)) | |
7cea05dc | 1076 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1077 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1078 | return 0; |
b9908bf9 | 1079 | } |
0f113f3e | 1080 | |
b9908bf9 MC |
1081 | /* cookie stuff for DTLS */ |
1082 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1083 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1084 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1085 | s->d1->cookie_len)) { |
b9908bf9 | 1086 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1087 | return 0; |
0f113f3e | 1088 | } |
b9908bf9 MC |
1089 | } |
1090 | ||
1091 | /* Ciphers supported */ | |
7cea05dc | 1092 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1093 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1094 | return 0; |
2c7b4dbc MC |
1095 | } |
1096 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1097 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1098 | return 0; | |
1099 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1100 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1101 | return 0; |
b9908bf9 | 1102 | } |
0f113f3e | 1103 | |
b9908bf9 | 1104 | /* COMPRESSION */ |
7cea05dc | 1105 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1106 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1107 | return 0; |
2c7b4dbc MC |
1108 | } |
1109 | #ifndef OPENSSL_NO_COMP | |
1110 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1111 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1112 | for (i = 0; i < compnum; i++) { | |
1113 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1114 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1115 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1116 | return 0; |
2c7b4dbc MC |
1117 | } |
1118 | } | |
b9908bf9 | 1119 | } |
09b6c2ef | 1120 | #endif |
2c7b4dbc | 1121 | /* Add the NULL method */ |
7cea05dc | 1122 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1123 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1124 | return 0; |
2c7b4dbc | 1125 | } |
761772d7 | 1126 | |
b9908bf9 | 1127 | /* TLS extensions */ |
30aeba43 | 1128 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1129 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1130 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1131 | return 0; |
b9908bf9 | 1132 | } |
0f113f3e | 1133 | |
b9908bf9 | 1134 | return 1; |
0f113f3e | 1135 | } |
d02b48c6 | 1136 | |
be3583fa | 1137 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1138 | { |
1139 | int al; | |
cb150cbc | 1140 | size_t cookie_len; |
8ba708e5 MC |
1141 | PACKET cookiepkt; |
1142 | ||
1143 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1144 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1145 | al = SSL_AD_DECODE_ERROR; |
1146 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1147 | goto f_err; | |
1148 | } | |
1149 | ||
1150 | cookie_len = PACKET_remaining(&cookiepkt); | |
1151 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1152 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1153 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1154 | goto f_err; | |
1155 | } | |
1156 | ||
1157 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1158 | al = SSL_AD_DECODE_ERROR; | |
1159 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1160 | goto f_err; | |
1161 | } | |
1162 | s->d1->cookie_len = cookie_len; | |
1163 | ||
1164 | return MSG_PROCESS_FINISHED_READING; | |
1165 | f_err: | |
1166 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1167 | ossl_statem_set_error(s); |
8ba708e5 MC |
1168 | return MSG_PROCESS_ERROR; |
1169 | } | |
1170 | ||
be3583fa | 1171 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1172 | { |
1173 | STACK_OF(SSL_CIPHER) *sk; | |
1174 | const SSL_CIPHER *c; | |
332eb390 | 1175 | PACKET session_id, extpkt; |
b9908bf9 | 1176 | size_t session_id_len; |
b6981744 | 1177 | const unsigned char *cipherchars; |
b9908bf9 MC |
1178 | int i, al = SSL_AD_INTERNAL_ERROR; |
1179 | unsigned int compression; | |
4fa52141 | 1180 | unsigned int sversion; |
3434f40b | 1181 | unsigned int context; |
4fa52141 | 1182 | int protverr; |
332eb390 | 1183 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1184 | #ifndef OPENSSL_NO_COMP |
1185 | SSL_COMP *comp; | |
1186 | #endif | |
1187 | ||
4fa52141 VD |
1188 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1189 | al = SSL_AD_DECODE_ERROR; | |
1190 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1191 | goto f_err; | |
1192 | } | |
50932c4a | 1193 | |
4ff65f77 | 1194 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1195 | protverr = ssl_choose_client_version(s, sversion); |
1196 | if (protverr != 0) { | |
1197 | al = SSL_AD_PROTOCOL_VERSION; | |
1198 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1199 | goto f_err; | |
0f113f3e | 1200 | } |
0f113f3e MC |
1201 | |
1202 | /* load the server hello data */ | |
1203 | /* load the server random */ | |
73999b62 | 1204 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1205 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1206 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1207 | goto f_err; |
1208 | } | |
0f113f3e | 1209 | |
fc5ce51d | 1210 | /* Get the session-id. */ |
71728dd8 MC |
1211 | if (!SSL_IS_TLS13(s)) { |
1212 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1213 | al = SSL_AD_DECODE_ERROR; | |
1214 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1215 | goto f_err; | |
1216 | } | |
1217 | session_id_len = PACKET_remaining(&session_id); | |
1218 | if (session_id_len > sizeof s->session->session_id | |
1219 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1220 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1221 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1222 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1223 | goto f_err; | |
1224 | } | |
1225 | } else { | |
625b0d51 | 1226 | PACKET_null_init(&session_id); |
71728dd8 | 1227 | session_id_len = 0; |
0f113f3e | 1228 | } |
e481f9b9 | 1229 | |
73999b62 | 1230 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1231 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1232 | al = SSL_AD_DECODE_ERROR; |
1233 | goto f_err; | |
1234 | } | |
1235 | ||
4ff65f77 MC |
1236 | if (!SSL_IS_TLS13(s)) { |
1237 | if (!PACKET_get_1(pkt, &compression)) { | |
1238 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1239 | al = SSL_AD_DECODE_ERROR; | |
1240 | goto f_err; | |
1241 | } | |
1242 | } else { | |
1243 | compression = 0; | |
1244 | } | |
1245 | ||
1246 | /* TLS extensions */ | |
1247 | if (PACKET_remaining(pkt) == 0) { | |
1248 | PACKET_null_init(&extpkt); | |
1249 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1250 | al = SSL_AD_DECODE_ERROR; | |
1251 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1252 | goto f_err; | |
1253 | } | |
1254 | ||
1255 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1256 | : EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1257 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1258 | goto f_err; |
1259 | ||
1260 | s->hit = 0; | |
1261 | ||
1262 | if (SSL_IS_TLS13(s)) { | |
1263 | /* This will set s->hit if we are resuming */ | |
1264 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1265 | EXT_TLS1_3_SERVER_HELLO, | |
1266 | extensions, NULL, 0, &al)) | |
1267 | goto f_err; | |
1268 | } else { | |
8c1a5343 | 1269 | /* |
4ff65f77 MC |
1270 | * Check if we can resume the session based on external pre-shared |
1271 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1272 | * Resumption based on server-side state works with session IDs. | |
1273 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1274 | * works by overriding the SessionTicket extension at the application | |
1275 | * layer, and does not send a session ID. (We do not know whether | |
1276 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1277 | * ID alone is not a reliable indicator of session resumption, so we | |
1278 | * first check if we can resume, and later peek at the next handshake | |
1279 | * message to see if the server wants to resume. | |
8c1a5343 | 1280 | */ |
4ff65f77 MC |
1281 | if (s->version >= TLS1_VERSION |
1282 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1283 | const SSL_CIPHER *pref_cipher = NULL; | |
1284 | /* | |
1285 | * s->session->master_key_length is a size_t, but this is an int for | |
1286 | * backwards compat reasons | |
1287 | */ | |
1288 | int master_key_length; | |
1289 | master_key_length = sizeof(s->session->master_key); | |
1290 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1291 | &master_key_length, | |
1292 | NULL, &pref_cipher, | |
1293 | s->ext.session_secret_cb_arg) | |
1294 | && master_key_length > 0) { | |
1295 | s->session->master_key_length = master_key_length; | |
1296 | s->session->cipher = pref_cipher ? | |
1297 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); | |
1298 | } else { | |
1299 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1300 | al = SSL_AD_INTERNAL_ERROR; | |
1301 | goto f_err; | |
1302 | } | |
0f113f3e | 1303 | } |
4ff65f77 MC |
1304 | |
1305 | if (session_id_len != 0 | |
1306 | && session_id_len == s->session->session_id_length | |
1307 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1308 | session_id_len) == 0) | |
1309 | s->hit = 1; | |
50932c4a MC |
1310 | } |
1311 | ||
4ff65f77 | 1312 | if (s->hit) { |
0f113f3e | 1313 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1314 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1315 | /* actually a client application bug */ |
1316 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1317 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1318 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1319 | goto f_err; | |
1320 | } | |
6e3d0153 | 1321 | } else { |
0f113f3e | 1322 | /* |
6e3d0153 | 1323 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1324 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1325 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1326 | * so the PAC-based session secret is always preserved. It'll be | |
1327 | * overwritten if the server refuses resumption. | |
0f113f3e | 1328 | */ |
4ff65f77 MC |
1329 | if (s->session->session_id_length > 0 |
1330 | || (SSL_IS_TLS13(s) | |
1331 | && s->session->ext.tick_identity | |
1332 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1333 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1334 | if (!ssl_get_new_session(s, 0)) { |
1335 | goto f_err; | |
1336 | } | |
1337 | } | |
50932c4a | 1338 | |
ccae4a15 | 1339 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1340 | s->session->session_id_length = session_id_len; |
1341 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1342 | if (session_id_len > 0) |
1343 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1344 | session_id_len); | |
0f113f3e | 1345 | } |
fc5ce51d | 1346 | |
ccae4a15 FI |
1347 | /* Session version and negotiated protocol version should match */ |
1348 | if (s->version != s->session->ssl_version) { | |
1349 | al = SSL_AD_PROTOCOL_VERSION; | |
1350 | ||
1351 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1352 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1353 | goto f_err; | |
1354 | } | |
1355 | ||
50932c4a | 1356 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1357 | if (c == NULL) { |
1358 | /* unknown cipher */ | |
1359 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1360 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1361 | goto f_err; |
1362 | } | |
0f113f3e | 1363 | /* |
3eb2aff4 KR |
1364 | * Now that we know the version, update the check to see if it's an allowed |
1365 | * version. | |
1366 | */ | |
1367 | s->s3->tmp.min_ver = s->version; | |
1368 | s->s3->tmp.max_ver = s->version; | |
1369 | /* | |
1370 | * If it is a disabled cipher we either didn't send it in client hello, | |
1371 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1372 | */ |
1373 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1374 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1375 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1376 | goto f_err; |
1377 | } | |
0f113f3e MC |
1378 | |
1379 | sk = ssl_get_ciphers_by_id(s); | |
1380 | i = sk_SSL_CIPHER_find(sk, c); | |
1381 | if (i < 0) { | |
1382 | /* we did not say we would use this cipher */ | |
1383 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1384 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1385 | goto f_err; |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * Depending on the session caching (internal/external), the cipher | |
1390 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1391 | * set and use it for comparison. | |
1392 | */ | |
1393 | if (s->session->cipher) | |
1394 | s->session->cipher_id = s->session->cipher->id; | |
1395 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1396 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1397 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1398 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1399 | goto f_err; | |
0f113f3e MC |
1400 | } |
1401 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1402 | |
09b6c2ef | 1403 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1404 | if (compression != 0) { |
0f113f3e | 1405 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1406 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1407 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1408 | goto f_err; | |
1409 | } | |
1410 | /* | |
1411 | * If compression is disabled we'd better not try to resume a session | |
1412 | * using compression. | |
1413 | */ | |
1414 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1415 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1416 | goto f_err; |
1417 | } | |
09b6c2ef | 1418 | #else |
fc5ce51d | 1419 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1420 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1421 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1422 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1423 | goto f_err; | |
1424 | } | |
fc5ce51d | 1425 | if (compression == 0) |
0f113f3e MC |
1426 | comp = NULL; |
1427 | else if (!ssl_allow_compression(s)) { | |
1428 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1429 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1430 | goto f_err; |
fc5ce51d EK |
1431 | } else { |
1432 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1433 | } | |
0f113f3e | 1434 | |
fc5ce51d | 1435 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1436 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1437 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1438 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1439 | goto f_err; | |
1440 | } else { | |
1441 | s->s3->tmp.new_compression = comp; | |
1442 | } | |
09b6c2ef | 1443 | #endif |
761772d7 | 1444 | |
4ff65f77 | 1445 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1446 | goto f_err; |
1447 | ||
8723588e MC |
1448 | #ifndef OPENSSL_NO_SCTP |
1449 | if (SSL_IS_DTLS(s) && s->hit) { | |
1450 | unsigned char sctpauthkey[64]; | |
1451 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1452 | ||
1453 | /* | |
1454 | * Add new shared key for SCTP-Auth, will be ignored if | |
1455 | * no SCTP used. | |
1456 | */ | |
141eb8c6 MC |
1457 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1458 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1459 | |
1460 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1461 | sizeof(sctpauthkey), |
1462 | labelbuffer, | |
1463 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1464 | goto f_err; |
8723588e MC |
1465 | |
1466 | BIO_ctrl(SSL_get_wbio(s), | |
1467 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1468 | sizeof(sctpauthkey), sctpauthkey); | |
1469 | } | |
1470 | #endif | |
1471 | ||
92760c21 MC |
1472 | /* |
1473 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1474 | * we're done with this message | |
1475 | */ | |
1476 | if (SSL_IS_TLS13(s) | |
1477 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1478 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1479 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1480 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1481 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1482 | al = SSL_AD_INTERNAL_ERROR; | |
1483 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1484 | goto f_err; | |
1485 | } | |
1486 | ||
1b0286a3 | 1487 | OPENSSL_free(extensions); |
b9908bf9 | 1488 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1489 | f_err: |
1490 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1491 | ossl_statem_set_error(s); |
1b0286a3 | 1492 | OPENSSL_free(extensions); |
b9908bf9 | 1493 | return MSG_PROCESS_ERROR; |
0f113f3e | 1494 | } |
d02b48c6 | 1495 | |
3847d426 MC |
1496 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1497 | { | |
1498 | unsigned int sversion; | |
2248dbeb | 1499 | int errorcode; |
3847d426 MC |
1500 | RAW_EXTENSION *extensions = NULL; |
1501 | int al; | |
1502 | PACKET extpkt; | |
1503 | ||
1504 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1505 | al = SSL_AD_DECODE_ERROR; | |
1506 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1507 | goto f_err; | |
1508 | } | |
1509 | ||
1510 | s->hello_retry_request = 1; | |
1511 | ||
1512 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1513 | errorcode = ssl_choose_client_version(s, sversion); |
1514 | if (errorcode != 0) { | |
3847d426 | 1515 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1516 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1517 | goto f_err; |
1518 | } | |
1519 | ||
1520 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1521 | al = SSL_AD_DECODE_ERROR; | |
1522 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1523 | goto f_err; | |
1524 | } | |
1525 | ||
1526 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
fc5ece2e | 1527 | &extensions, &al, NULL) |
3847d426 MC |
1528 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, |
1529 | extensions, NULL, 0, &al)) | |
1530 | goto f_err; | |
1531 | ||
1532 | OPENSSL_free(extensions); | |
1533 | ||
1534 | return MSG_PROCESS_FINISHED_READING; | |
1535 | f_err: | |
1536 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1537 | ossl_statem_set_error(s); | |
1538 | OPENSSL_free(extensions); | |
1539 | return MSG_PROCESS_ERROR; | |
1540 | } | |
1541 | ||
be3583fa | 1542 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1543 | { |
1544 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1545 | unsigned long cert_list_len, cert_len; | |
1546 | X509 *x = NULL; | |
b6981744 | 1547 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1548 | STACK_OF(X509) *sk = NULL; |
1549 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1550 | size_t chainidx; |
e96e0f8e | 1551 | unsigned int context = 0; |
0f113f3e MC |
1552 | |
1553 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1554 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1555 | goto err; |
0f113f3e MC |
1556 | } |
1557 | ||
e96e0f8e MC |
1558 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1559 | || context != 0 | |
1560 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1561 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1562 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1563 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1564 | goto f_err; |
1565 | } | |
d805a57b | 1566 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1567 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1568 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1569 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1570 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1571 | SSL_R_CERT_LENGTH_MISMATCH); |
1572 | goto f_err; | |
1573 | } | |
1574 | ||
df758a85 MC |
1575 | certstart = certbytes; |
1576 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1577 | if (x == NULL) { |
1578 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1579 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1580 | goto f_err; |
1581 | } | |
df758a85 | 1582 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1583 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1584 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1585 | SSL_R_CERT_LENGTH_MISMATCH); |
1586 | goto f_err; | |
1587 | } | |
e96e0f8e MC |
1588 | |
1589 | if (SSL_IS_TLS13(s)) { | |
1590 | RAW_EXTENSION *rawexts = NULL; | |
1591 | PACKET extensions; | |
1592 | ||
1593 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1594 | al = SSL_AD_DECODE_ERROR; | |
1595 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1596 | goto f_err; | |
1597 | } | |
1598 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
fc5ece2e | 1599 | &rawexts, &al, NULL) |
e96e0f8e | 1600 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, |
5ee289ea MC |
1601 | rawexts, x, chainidx, &al)) { |
1602 | OPENSSL_free(rawexts); | |
e96e0f8e | 1603 | goto f_err; |
5ee289ea MC |
1604 | } |
1605 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1606 | } |
1607 | ||
0f113f3e | 1608 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1609 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1610 | goto err; |
0f113f3e MC |
1611 | } |
1612 | x = NULL; | |
0f113f3e MC |
1613 | } |
1614 | ||
1615 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1616 | /* |
1617 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1618 | * for client side verification of the server certificate to take place. | |
1619 | * However, historically the code has only checked that *any* flag is set | |
1620 | * to cause server verification to take place. Use of the other flags makes | |
1621 | * no sense in client mode. An attempt to clean up the semantics was | |
1622 | * reverted because at least one application *only* set | |
1623 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1624 | * server verification to take place, after the clean up it silently did | |
1625 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1626 | * sent to them because they are void functions. Therefore, we now use the | |
1627 | * (less clean) historic behaviour of performing validation if any flag is | |
1628 | * set. The *documented* interface remains the same. | |
1629 | */ | |
1630 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1631 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1632 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1633 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1634 | goto f_err; | |
1635 | } | |
1636 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1637 | if (i > 1) { | |
b9908bf9 | 1638 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1639 | al = SSL_AD_HANDSHAKE_FAILURE; |
1640 | goto f_err; | |
1641 | } | |
1642 | ||
c34b0f99 | 1643 | s->session->peer_chain = sk; |
0f113f3e MC |
1644 | /* |
1645 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1646 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1647 | */ |
1648 | x = sk_X509_value(sk, 0); | |
1649 | sk = NULL; | |
1650 | /* | |
1651 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1652 | */ | |
1653 | ||
8382fd3a | 1654 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1655 | |
55a9a16f | 1656 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1657 | x = NULL; |
1658 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1659 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1660 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1661 | goto f_err; | |
1662 | } | |
1663 | ||
1664 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1665 | if (i < 0) { |
0f113f3e MC |
1666 | x = NULL; |
1667 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1668 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1669 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1670 | goto f_err; | |
1671 | } | |
05b8486e DSH |
1672 | /* |
1673 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1674 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1675 | * type. | |
1676 | */ | |
1677 | if (!SSL_IS_TLS13(s)) { | |
1678 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1679 | if (exp_idx >= 0 && i != exp_idx | |
1680 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1681 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1682 | && i != SSL_PKEY_GOST01))) { | |
1683 | x = NULL; | |
1684 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1685 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1686 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1687 | goto f_err; | |
1688 | } | |
0f113f3e | 1689 | } |
a273c6ee | 1690 | s->session->peer_type = i; |
55a9a16f MC |
1691 | |
1692 | X509_free(s->session->peer); | |
05f0fb9f | 1693 | X509_up_ref(x); |
55a9a16f | 1694 | s->session->peer = x; |
0f113f3e | 1695 | s->session->verify_result = s->verify_result; |
0f113f3e | 1696 | x = NULL; |
2c5dfdc3 MC |
1697 | |
1698 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1699 | if (SSL_IS_TLS13(s) | |
1700 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1701 | sizeof(s->cert_verify_hash), | |
1702 | &s->cert_verify_hash_len)) { | |
1703 | al = SSL_AD_INTERNAL_ERROR; | |
1704 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1705 | goto f_err; | |
1706 | } | |
1707 | ||
b9908bf9 | 1708 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1709 | goto done; |
1710 | ||
0f113f3e | 1711 | f_err: |
66696478 | 1712 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1713 | err: |
fe3a3291 | 1714 | ossl_statem_set_error(s); |
66696478 | 1715 | done: |
0f113f3e MC |
1716 | X509_free(x); |
1717 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1718 | return ret; |
0f113f3e | 1719 | } |
d02b48c6 | 1720 | |
7dc1c647 | 1721 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1722 | { |
1723 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1724 | PACKET psk_identity_hint; |
02a74590 | 1725 | |
7dc1c647 MC |
1726 | /* PSK ciphersuites are preceded by an identity hint */ |
1727 | ||
1728 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1729 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1730 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1731 | return 0; |
1732 | } | |
1733 | ||
1734 | /* | |
1735 | * Store PSK identity hint for later use, hint is used in | |
1736 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1737 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1738 | * identity. | |
1739 | */ | |
1740 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1741 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1742 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1743 | return 0; |
1744 | } | |
02a74590 | 1745 | |
7dc1c647 MC |
1746 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1747 | OPENSSL_free(s->session->psk_identity_hint); | |
1748 | s->session->psk_identity_hint = NULL; | |
1749 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1750 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1751 | *al = SSL_AD_INTERNAL_ERROR; |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | return 1; | |
1756 | #else | |
4fa88861 | 1757 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1758 | *al = SSL_AD_INTERNAL_ERROR; |
1759 | return 0; | |
02a74590 MC |
1760 | #endif |
1761 | } | |
1762 | ||
25c6c10c MC |
1763 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1764 | { | |
1765 | #ifndef OPENSSL_NO_SRP | |
1766 | PACKET prime, generator, salt, server_pub; | |
1767 | ||
1768 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1769 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1770 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1771 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1772 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1773 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1774 | return 0; |
1775 | } | |
1776 | ||
348240c6 | 1777 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1778 | if ((s->srp_ctx.N = |
1779 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1780 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1781 | || (s->srp_ctx.g = |
1782 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1783 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1784 | || (s->srp_ctx.s = |
1785 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1786 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1787 | || (s->srp_ctx.B = |
1788 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1789 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1790 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1791 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1792 | return 0; |
1793 | } | |
1794 | ||
1795 | if (!srp_verify_server_param(s, al)) { | |
1796 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1797 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1798 | return 0; |
1799 | } | |
1800 | ||
1801 | /* We must check if there is a certificate */ | |
a230b26e | 1802 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1803 | *pkey = X509_get0_pubkey(s->session->peer); |
1804 | ||
1805 | return 1; | |
1806 | #else | |
4fa88861 | 1807 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1808 | *al = SSL_AD_INTERNAL_ERROR; |
1809 | return 0; | |
1810 | #endif | |
1811 | } | |
1812 | ||
e01a610d MC |
1813 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1814 | { | |
1815 | #ifndef OPENSSL_NO_DH | |
1816 | PACKET prime, generator, pub_key; | |
1817 | EVP_PKEY *peer_tmp = NULL; | |
1818 | ||
1819 | DH *dh = NULL; | |
1820 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1821 | ||
26505153 RL |
1822 | int check_bits = 0; |
1823 | ||
e01a610d MC |
1824 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1825 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1826 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1827 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1828 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1829 | return 0; |
1830 | } | |
1831 | ||
1832 | peer_tmp = EVP_PKEY_new(); | |
1833 | dh = DH_new(); | |
1834 | ||
1835 | if (peer_tmp == NULL || dh == NULL) { | |
1836 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1837 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1838 | goto err; |
1839 | } | |
1840 | ||
348240c6 MC |
1841 | /* TODO(size_t): Convert these calls */ |
1842 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1843 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1844 | NULL); | |
1845 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1846 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1847 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1848 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1849 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1850 | goto err; |
1851 | } | |
1852 | ||
26505153 RL |
1853 | /* test non-zero pupkey */ |
1854 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1855 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1856 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1857 | goto err; |
1858 | } | |
1859 | ||
1860 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1861 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1862 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1863 | goto err; |
1864 | } | |
1865 | p = g = NULL; | |
1866 | ||
26505153 RL |
1867 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1868 | *al = SSL_AD_DECODE_ERROR; | |
1869 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1870 | goto err; | |
1871 | } | |
1872 | ||
e01a610d MC |
1873 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1874 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1875 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1876 | goto err; |
1877 | } | |
1878 | bnpub_key = NULL; | |
1879 | ||
1880 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1881 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1882 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1883 | goto err; |
1884 | } | |
1885 | ||
1886 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1887 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1888 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1889 | goto err; |
1890 | } | |
1891 | ||
1892 | s->s3->peer_tmp = peer_tmp; | |
1893 | ||
1894 | /* | |
1895 | * FIXME: This makes assumptions about which ciphersuites come with | |
1896 | * public keys. We should have a less ad-hoc way of doing this | |
1897 | */ | |
a230b26e | 1898 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1899 | *pkey = X509_get0_pubkey(s->session->peer); |
1900 | /* else anonymous DH, so no certificate or pkey. */ | |
1901 | ||
1902 | return 1; | |
1903 | ||
1904 | err: | |
1905 | BN_free(p); | |
1906 | BN_free(g); | |
1907 | BN_free(bnpub_key); | |
1908 | DH_free(dh); | |
1909 | EVP_PKEY_free(peer_tmp); | |
1910 | ||
1911 | return 0; | |
1912 | #else | |
4fa88861 | 1913 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1914 | *al = SSL_AD_INTERNAL_ERROR; |
1915 | return 0; | |
1916 | #endif | |
1917 | } | |
1918 | ||
ff74aeb1 MC |
1919 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1920 | { | |
1921 | #ifndef OPENSSL_NO_EC | |
1922 | PACKET encoded_pt; | |
1923 | const unsigned char *ecparams; | |
1924 | int curve_nid; | |
ec24630a | 1925 | unsigned int curve_flags; |
ff74aeb1 MC |
1926 | EVP_PKEY_CTX *pctx = NULL; |
1927 | ||
1928 | /* | |
1929 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1930 | * public key. For now we only support named (not generic) curves and | |
1931 | * ECParameters in this case is just three bytes. | |
1932 | */ | |
1933 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1934 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1935 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1936 | return 0; |
1937 | } | |
1938 | /* | |
1939 | * Check curve is one of our preferences, if not server has sent an | |
1940 | * invalid curve. ECParameters is 3 bytes. | |
1941 | */ | |
1942 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1943 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1944 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1945 | return 0; |
1946 | } | |
1947 | ||
ec24630a DSH |
1948 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1949 | ||
a230b26e | 1950 | if (curve_nid == 0) { |
ff74aeb1 | 1951 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1952 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1953 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1954 | return 0; | |
1955 | } | |
1956 | ||
ec24630a DSH |
1957 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1958 | EVP_PKEY *key = EVP_PKEY_new(); | |
1959 | ||
1960 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1961 | *al = SSL_AD_INTERNAL_ERROR; | |
1962 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1963 | EVP_PKEY_free(key); | |
1964 | return 0; | |
1965 | } | |
1966 | s->s3->peer_tmp = key; | |
1967 | } else { | |
1968 | /* Set up EVP_PKEY with named curve as parameters */ | |
1969 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1970 | if (pctx == NULL | |
1971 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1972 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1973 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1974 | *al = SSL_AD_INTERNAL_ERROR; | |
1975 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1976 | EVP_PKEY_CTX_free(pctx); | |
1977 | return 0; | |
1978 | } | |
ff74aeb1 | 1979 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1980 | pctx = NULL; |
ff74aeb1 | 1981 | } |
ff74aeb1 MC |
1982 | |
1983 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1984 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1985 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1986 | return 0; |
1987 | } | |
1988 | ||
ec24630a DSH |
1989 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1990 | PACKET_data(&encoded_pt), | |
1991 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1992 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1993 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1994 | return 0; |
1995 | } | |
1996 | ||
1997 | /* | |
1998 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1999 | * ECParameters in the server key exchange message. We do support RSA | |
2000 | * and ECDSA. | |
2001 | */ | |
2002 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2003 | *pkey = X509_get0_pubkey(s->session->peer); | |
2004 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2005 | *pkey = X509_get0_pubkey(s->session->peer); | |
2006 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2007 | ||
2008 | return 1; | |
2009 | #else | |
4fa88861 | 2010 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2011 | *al = SSL_AD_INTERNAL_ERROR; |
2012 | return 0; | |
2013 | #endif | |
2014 | } | |
2015 | ||
be3583fa | 2016 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2017 | { |
5554facb | 2018 | int al = -1; |
e1e588ac | 2019 | long alg_k; |
b9908bf9 | 2020 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2021 | EVP_MD_CTX *md_ctx = NULL; |
2022 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2023 | PACKET save_param_start, signature; |
b9908bf9 | 2024 | |
b9908bf9 MC |
2025 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2026 | ||
73999b62 | 2027 | save_param_start = *pkt; |
8d92c1f8 | 2028 | |
3260adf1 | 2029 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2030 | EVP_PKEY_free(s->s3->peer_tmp); |
2031 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2032 | #endif |
d02b48c6 | 2033 | |
7689082b | 2034 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2035 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2036 | goto err; | |
7689082b DSH |
2037 | } |
2038 | ||
2039 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2040 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2041 | } else if (alg_k & SSL_kSRP) { |
2042 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2043 | goto err; |
e01a610d MC |
2044 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2045 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2046 | goto err; | |
ff74aeb1 MC |
2047 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2048 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2049 | goto err; | |
0f113f3e MC |
2050 | } else if (alg_k) { |
2051 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2052 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2053 | goto err; |
0f113f3e | 2054 | } |
0f113f3e | 2055 | |
0f113f3e MC |
2056 | /* if it was signed, check the signature */ |
2057 | if (pkey != NULL) { | |
32942870 | 2058 | PACKET params; |
be8dba2c MC |
2059 | int maxsig; |
2060 | const EVP_MD *md = NULL; | |
e1e588ac | 2061 | |
32942870 EK |
2062 | /* |
2063 | * |pkt| now points to the beginning of the signature, so the difference | |
2064 | * equals the length of the parameters. | |
2065 | */ | |
2066 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2067 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2068 | PACKET_remaining(pkt))) { |
32942870 | 2069 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2070 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2071 | goto err; |
32942870 EK |
2072 | } |
2073 | ||
0f113f3e | 2074 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2075 | unsigned int sigalg; |
0f113f3e | 2076 | int rv; |
703bcee0 MC |
2077 | |
2078 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2079 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2080 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2081 | goto err; |
0f113f3e | 2082 | } |
5554facb | 2083 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2084 | if (rv == -1) { |
2085 | al = SSL_AD_INTERNAL_ERROR; | |
2086 | goto err; | |
2087 | } else if (rv == 0) { | |
2088 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2089 | goto err; |
0f113f3e | 2090 | } |
a2f9200f | 2091 | #ifdef SSL_DEBUG |
0f113f3e MC |
2092 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2093 | #endif | |
f365a3e2 DSH |
2094 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2095 | al = SSL_AD_INTERNAL_ERROR; | |
2096 | goto err; | |
32942870 | 2097 | } |
0f113f3e | 2098 | |
f365a3e2 DSH |
2099 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2100 | ||
73999b62 MC |
2101 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2102 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2103 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2104 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2105 | goto err; |
0f113f3e | 2106 | } |
be8dba2c MC |
2107 | maxsig = EVP_PKEY_size(pkey); |
2108 | if (maxsig < 0) { | |
e1e588ac | 2109 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2110 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2111 | goto err; |
8098fc56 | 2112 | } |
0f113f3e MC |
2113 | |
2114 | /* | |
8098fc56 | 2115 | * Check signature length |
0f113f3e | 2116 | */ |
be8dba2c | 2117 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2118 | /* wrong packet length */ |
e1e588ac | 2119 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2120 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2121 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2122 | goto err; |
2123 | } | |
2124 | ||
2125 | md_ctx = EVP_MD_CTX_new(); | |
2126 | if (md_ctx == NULL) { | |
2127 | al = SSL_AD_INTERNAL_ERROR; | |
2128 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2129 | goto err; | |
0f113f3e | 2130 | } |
e1e588ac | 2131 | |
fe3066ee MC |
2132 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2133 | al = SSL_AD_INTERNAL_ERROR; | |
2134 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2135 | goto err; | |
2136 | } | |
5554facb | 2137 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2138 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2139 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2140 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2141 | al = SSL_AD_INTERNAL_ERROR; |
2142 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2143 | goto err; | |
2144 | } | |
2145 | } | |
2146 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2147 | SSL3_RANDOM_SIZE) <= 0 | |
2148 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2149 | SSL3_RANDOM_SIZE) <= 0 | |
2150 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2151 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2152 | al = SSL_AD_INTERNAL_ERROR; |
2153 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2154 | goto err; |
192e4bbb | 2155 | } |
fe3066ee MC |
2156 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2157 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2158 | /* bad signature */ |
2159 | al = SSL_AD_DECRYPT_ERROR; | |
2160 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2161 | goto err; |
0f113f3e | 2162 | } |
e1e588ac | 2163 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2164 | md_ctx = NULL; |
0f113f3e | 2165 | } else { |
7689082b | 2166 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2167 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2168 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2169 | /* Might be wrong key type, check it */ |
e1e588ac | 2170 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2171 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2172 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2173 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2174 | } else { |
2175 | al = SSL_AD_DECODE_ERROR; | |
2176 | } | |
0f113f3e MC |
2177 | goto err; |
2178 | } | |
2179 | /* still data left over */ | |
73999b62 | 2180 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2181 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2182 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2183 | goto err; |
0f113f3e MC |
2184 | } |
2185 | } | |
e1e588ac | 2186 | |
b9908bf9 | 2187 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2188 | err: |
7dc1c647 MC |
2189 | if (al != -1) |
2190 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2191 | ossl_statem_set_error(s); |
fe3066ee | 2192 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2193 | return MSG_PROCESS_ERROR; |
0f113f3e | 2194 | } |
d02b48c6 | 2195 | |
be3583fa | 2196 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2197 | { |
2198 | int ret = MSG_PROCESS_ERROR; | |
2199 | unsigned int list_len, ctype_num, i, name_len; | |
2200 | X509_NAME *xn = NULL; | |
b6981744 EK |
2201 | const unsigned char *data; |
2202 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 2203 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
2204 | |
2205 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2206 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2207 | goto err; |
2208 | } | |
2209 | ||
2210 | /* get the certificate types */ | |
73999b62 | 2211 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 2212 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 2213 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2214 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
2215 | goto err; |
2216 | } | |
b548a1f1 RS |
2217 | OPENSSL_free(s->cert->ctypes); |
2218 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2219 | if (ctype_num > SSL3_CT_NUMBER) { |
2220 | /* If we exceed static buffer copy all to cert structure */ | |
2221 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2222 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 2223 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2224 | goto err; |
2225 | } | |
ac112332 | 2226 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 2227 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
2228 | ctype_num = SSL3_CT_NUMBER; |
2229 | } | |
2230 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2231 | s->s3->tmp.ctype[i] = data[i]; |
2232 | ||
0f113f3e | 2233 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2234 | PACKET sigalgs; |
2235 | ||
2236 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2237 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2238 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2239 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2240 | goto err; |
2241 | } | |
ac112332 | 2242 | |
9195ddcd DSH |
2243 | /* Clear certificate validity flags */ |
2244 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 2245 | s->s3->tmp.valid_flags[i] = 0; |
703bcee0 | 2246 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2247 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2248 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2249 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2250 | goto err; | |
2251 | } | |
2252 | if (!tls1_process_sigalgs(s)) { | |
2253 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2254 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2255 | goto err; |
2256 | } | |
0f113f3e MC |
2257 | } |
2258 | ||
2259 | /* get the CA RDNs */ | |
73999b62 | 2260 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2261 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2262 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2263 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2264 | goto err; |
2265 | } | |
2266 | ||
73999b62 MC |
2267 | while (PACKET_remaining(pkt)) { |
2268 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2269 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2270 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2271 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2272 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2273 | goto err; |
2274 | } | |
2275 | ||
ac112332 | 2276 | namestart = namebytes; |
0f113f3e | 2277 | |
ac112332 MC |
2278 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2279 | name_len)) == NULL) { | |
3c33c6f6 | 2280 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2281 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2282 | goto err; |
0f113f3e MC |
2283 | } |
2284 | ||
ac112332 | 2285 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2286 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2287 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2288 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2289 | goto err; | |
2290 | } | |
2291 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2292 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2293 | goto err; |
2294 | } | |
6afef8b1 | 2295 | xn = NULL; |
0f113f3e MC |
2296 | } |
2297 | ||
0f113f3e MC |
2298 | /* we should setup a certificate to return.... */ |
2299 | s->s3->tmp.cert_req = 1; | |
2300 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2301 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2302 | s->s3->tmp.ca_names = ca_sk; |
2303 | ca_sk = NULL; | |
2304 | ||
05c4f1d5 | 2305 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2306 | goto done; |
0f113f3e | 2307 | err: |
fe3a3291 | 2308 | ossl_statem_set_error(s); |
cc273a93 | 2309 | done: |
6afef8b1 | 2310 | X509_NAME_free(xn); |
222561fe | 2311 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2312 | return ret; |
0f113f3e MC |
2313 | } |
2314 | ||
2315 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2316 | { |
0f113f3e | 2317 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2318 | } |
dfeab068 | 2319 | |
be3583fa | 2320 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2321 | { |
6df55cac | 2322 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2323 | unsigned int ticklen; |
9ac6244b | 2324 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2325 | unsigned int sess_len; |
de1df7e9 | 2326 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2327 | |
73999b62 | 2328 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2329 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2330 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2331 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2332 | || (SSL_IS_TLS13(s) |
2333 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2334 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2335 | goto f_err; |
2336 | } | |
2337 | ||
de1df7e9 MC |
2338 | /* |
2339 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2340 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2341 | * be 0 here in that instance | |
2342 | */ | |
e711da71 | 2343 | if (ticklen == 0) |
c9de4a20 | 2344 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2345 | |
de1df7e9 | 2346 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2347 | if (s->session->session_id_length > 0) { |
2348 | int i = s->session_ctx->session_cache_mode; | |
2349 | SSL_SESSION *new_sess; | |
2350 | /* | |
2351 | * We reused an existing session, so we need to replace it with a new | |
2352 | * one | |
2353 | */ | |
2354 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2355 | /* | |
e4612d02 | 2356 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2357 | */ |
e4612d02 | 2358 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2359 | } |
2360 | ||
2361 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2362 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2363 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2364 | goto f_err; |
2365 | } | |
2366 | ||
2367 | SSL_SESSION_free(s->session); | |
2368 | s->session = new_sess; | |
2369 | } | |
2370 | ||
fc24f0bf MC |
2371 | /* |
2372 | * Technically the cast to long here is not guaranteed by the C standard - | |
2373 | * but we use it elsewhere, so this should be ok. | |
2374 | */ | |
2375 | s->session->time = (long)time(NULL); | |
2376 | ||
aff8c126 RS |
2377 | OPENSSL_free(s->session->ext.tick); |
2378 | s->session->ext.tick = NULL; | |
2379 | s->session->ext.ticklen = 0; | |
e711da71 | 2380 | |
aff8c126 RS |
2381 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2382 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2383 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2384 | goto err; |
2385 | } | |
aff8c126 | 2386 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2387 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2388 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2389 | goto f_err; |
2390 | } | |
e711da71 | 2391 | |
aff8c126 | 2392 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2393 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2394 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2395 | |
2396 | if (SSL_IS_TLS13(s)) { | |
2397 | PACKET extpkt; | |
2398 | ||
2399 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2400 | || !tls_collect_extensions(s, &extpkt, | |
2401 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
fc5ece2e | 2402 | &exts, &al, NULL) |
de1df7e9 MC |
2403 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, |
2404 | exts, NULL, 0, &al)) { | |
2405 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2406 | goto f_err; | |
2407 | } | |
2408 | } | |
2409 | ||
0f113f3e MC |
2410 | /* |
2411 | * There are two ways to detect a resumed ticket session. One is to set | |
2412 | * an appropriate session ID and then the server must return a match in | |
2413 | * ServerHello. This allows the normal client session ID matching to work | |
2414 | * and we know much earlier that the ticket has been accepted. The | |
2415 | * other way is to set zero length session ID when the ticket is | |
2416 | * presented and rely on the handshake to determine session resumption. | |
2417 | * We choose the former approach because this fits in with assumptions | |
2418 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2419 | * SHA256 is disabled) hash of the ticket. | |
2420 | */ | |
ec60ccc1 MC |
2421 | /* |
2422 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2423 | * but s->session->session_id_length is a size_t | |
2424 | */ | |
aff8c126 | 2425 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2426 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2427 | EVP_sha256(), NULL)) { |
2428 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2429 | goto err; | |
2430 | } | |
ec60ccc1 | 2431 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2432 | |
2433 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2434 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2435 | OPENSSL_free(exts); |
de1df7e9 MC |
2436 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2437 | return MSG_PROCESS_FINISHED_READING; | |
2438 | } | |
2439 | ||
b9908bf9 | 2440 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2441 | f_err: |
2442 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2443 | err: | |
fe3a3291 | 2444 | ossl_statem_set_error(s); |
33d93417 | 2445 | OPENSSL_free(exts); |
b9908bf9 | 2446 | return MSG_PROCESS_ERROR; |
0f113f3e | 2447 | } |
67c8e7f4 | 2448 | |
f63e4288 MC |
2449 | /* |
2450 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2451 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2452 | * |*al| is populated with a suitable alert code. | |
2453 | */ | |
2454 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2455 | { |
8b0e934a | 2456 | size_t resplen; |
b9908bf9 | 2457 | unsigned int type; |
b9908bf9 | 2458 | |
73999b62 | 2459 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2460 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2461 | *al = SSL_AD_DECODE_ERROR; |
2462 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2463 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2464 | return 0; | |
0f113f3e | 2465 | } |
56a26ce3 MC |
2466 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2467 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2468 | *al = SSL_AD_DECODE_ERROR; |
2469 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2470 | return 0; | |
0f113f3e | 2471 | } |
8cbfcc70 RS |
2472 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2473 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2474 | *al = SSL_AD_INTERNAL_ERROR; |
2475 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2476 | return 0; | |
0f113f3e | 2477 | } |
8cbfcc70 | 2478 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2479 | *al = SSL_AD_DECODE_ERROR; |
2480 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2481 | return 0; | |
ac63710a | 2482 | } |
8cbfcc70 | 2483 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2484 | |
2485 | return 1; | |
2486 | } | |
2faa1b48 | 2487 | |
f63e4288 MC |
2488 | |
2489 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2490 | { | |
2491 | int al; | |
2492 | ||
2493 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2494 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2495 | ossl_statem_set_error(s); | |
2496 | return MSG_PROCESS_ERROR; | |
2497 | } | |
2498 | ||
b9908bf9 | 2499 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2500 | } |
d02b48c6 | 2501 | |
7776a36c MC |
2502 | /* |
2503 | * Perform miscellaneous checks and processing after we have received the | |
2504 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2505 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2506 | * on failure. | |
7776a36c MC |
2507 | */ |
2508 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2509 | { |
a455d0f6 MC |
2510 | /* |
2511 | * at this point we check that we have the required stuff from | |
2512 | * the server | |
2513 | */ | |
2514 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2515 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2516 | return 0; | |
a455d0f6 MC |
2517 | } |
2518 | ||
bb1aaab4 | 2519 | /* |
aff8c126 RS |
2520 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2521 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2522 | * message, or NULL and -1 otherwise |
2523 | */ | |
aff8c126 RS |
2524 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2525 | && s->ctx->ext.status_cb != NULL) { | |
2526 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2527 | ||
bb1aaab4 | 2528 | if (ret == 0) { |
7776a36c MC |
2529 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2530 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2531 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2532 | return 0; |
bb1aaab4 MC |
2533 | } |
2534 | if (ret < 0) { | |
7776a36c MC |
2535 | *al = SSL_AD_INTERNAL_ERROR; |
2536 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2537 | ERR_R_MALLOC_FAILURE); | |
2538 | return 0; | |
bb1aaab4 MC |
2539 | } |
2540 | } | |
ed29e82a RP |
2541 | #ifndef OPENSSL_NO_CT |
2542 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2543 | /* Note we validate the SCTs whether or not we abort on error */ |
2544 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2545 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2546 | return 0; | |
ed29e82a RP |
2547 | } |
2548 | } | |
2549 | #endif | |
2550 | ||
7776a36c MC |
2551 | return 1; |
2552 | } | |
2553 | ||
2554 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2555 | { | |
2556 | int al = SSL_AD_INTERNAL_ERROR; | |
2557 | ||
2558 | if (PACKET_remaining(pkt) > 0) { | |
2559 | /* should contain no data */ | |
2560 | al = SSL_AD_DECODE_ERROR; | |
2561 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2562 | goto err; | |
2563 | } | |
2564 | #ifndef OPENSSL_NO_SRP | |
2565 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2566 | if (SRP_Calc_A_param(s) <= 0) { | |
2567 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2568 | goto err; | |
2569 | } | |
2570 | } | |
2571 | #endif | |
2572 | ||
2573 | /* | |
2574 | * Error queue messages are generated directly by this function | |
2575 | */ | |
2576 | if (!tls_process_initial_server_flight(s, &al)) | |
2577 | goto err; | |
2578 | ||
473483d4 MC |
2579 | #ifndef OPENSSL_NO_SCTP |
2580 | /* Only applies to renegotiation */ | |
2581 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2582 | && s->renegotiate != 0) |
473483d4 MC |
2583 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2584 | else | |
2585 | #endif | |
2586 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2587 | |
2588 | err: | |
2589 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2590 | ossl_statem_set_error(s); | |
2591 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2592 | } |
176f31dd | 2593 | |
f1ec23c0 | 2594 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2595 | { |
7689082b | 2596 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2597 | int ret = 0; |
2598 | /* | |
2599 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2600 | * \0-terminated identity. The last byte is for us for simulating | |
2601 | * strnlen. | |
2602 | */ | |
2603 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2604 | size_t identitylen = 0; | |
2605 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2606 | unsigned char *tmppsk = NULL; | |
2607 | char *tmpidentity = NULL; | |
2608 | size_t psklen = 0; | |
2609 | ||
2610 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2611 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2612 | *al = SSL_AD_INTERNAL_ERROR; |
2613 | goto err; | |
2614 | } | |
d02b48c6 | 2615 | |
13c0ec4a | 2616 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2617 | |
13c0ec4a MC |
2618 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2619 | identity, sizeof(identity) - 1, | |
2620 | psk, sizeof(psk)); | |
7689082b | 2621 | |
13c0ec4a | 2622 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2623 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2624 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2625 | goto err; | |
2626 | } else if (psklen == 0) { | |
05ec6a25 | 2627 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2628 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2629 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2630 | goto err; | |
2631 | } | |
7689082b | 2632 | |
13c0ec4a MC |
2633 | identitylen = strlen(identity); |
2634 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2635 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2636 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2637 | goto err; | |
2638 | } | |
7689082b | 2639 | |
13c0ec4a MC |
2640 | tmppsk = OPENSSL_memdup(psk, psklen); |
2641 | tmpidentity = OPENSSL_strdup(identity); | |
2642 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2643 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2644 | *al = SSL_AD_INTERNAL_ERROR; |
2645 | goto err; | |
2646 | } | |
7689082b | 2647 | |
13c0ec4a MC |
2648 | OPENSSL_free(s->s3->tmp.psk); |
2649 | s->s3->tmp.psk = tmppsk; | |
2650 | s->s3->tmp.psklen = psklen; | |
2651 | tmppsk = NULL; | |
2652 | OPENSSL_free(s->session->psk_identity); | |
2653 | s->session->psk_identity = tmpidentity; | |
2654 | tmpidentity = NULL; | |
f1ec23c0 | 2655 | |
b2b3024e | 2656 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2658 | *al = SSL_AD_INTERNAL_ERROR; | |
2659 | goto err; | |
2660 | } | |
7689082b | 2661 | |
13c0ec4a | 2662 | ret = 1; |
0bce0b02 | 2663 | |
13c0ec4a MC |
2664 | err: |
2665 | OPENSSL_cleanse(psk, psklen); | |
2666 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2667 | OPENSSL_clear_free(tmppsk, psklen); | |
2668 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2669 | |
13c0ec4a MC |
2670 | return ret; |
2671 | #else | |
05ec6a25 | 2672 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2673 | *al = SSL_AD_INTERNAL_ERROR; |
2674 | return 0; | |
b9908bf9 | 2675 | #endif |
13c0ec4a | 2676 | } |
b9908bf9 | 2677 | |
f1ec23c0 | 2678 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2679 | { |
bc36ee62 | 2680 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2681 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2682 | EVP_PKEY *pkey = NULL; |
2683 | EVP_PKEY_CTX *pctx = NULL; | |
2684 | size_t enclen; | |
2685 | unsigned char *pms = NULL; | |
2686 | size_t pmslen = 0; | |
b9908bf9 | 2687 | |
13c0ec4a MC |
2688 | if (s->session->peer == NULL) { |
2689 | /* | |
2690 | * We should always have a server certificate with SSL_kRSA. | |
2691 | */ | |
05ec6a25 | 2692 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2693 | return 0; |
2694 | } | |
0f113f3e | 2695 | |
13c0ec4a MC |
2696 | pkey = X509_get0_pubkey(s->session->peer); |
2697 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2698 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2699 | return 0; |
2700 | } | |
0f113f3e | 2701 | |
13c0ec4a MC |
2702 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2703 | pms = OPENSSL_malloc(pmslen); | |
2704 | if (pms == NULL) { | |
05ec6a25 | 2705 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2706 | *al = SSL_AD_INTERNAL_ERROR; |
2707 | return 0; | |
2708 | } | |
0bce0b02 | 2709 | |
13c0ec4a MC |
2710 | pms[0] = s->client_version >> 8; |
2711 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2712 | /* TODO(size_t): Convert this function */ |
2713 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2714 | goto err; |
2715 | } | |
0f113f3e | 2716 | |
13c0ec4a | 2717 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2718 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2719 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2720 | goto err; | |
2721 | } | |
13c0ec4a MC |
2722 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2723 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2724 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2725 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2726 | goto err; |
2727 | } | |
f1ec23c0 MC |
2728 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2729 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2730 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2731 | goto err; |
2732 | } | |
13c0ec4a MC |
2733 | EVP_PKEY_CTX_free(pctx); |
2734 | pctx = NULL; | |
0f113f3e | 2735 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2736 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2737 | (*p)[1]++; | |
2738 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2739 | tmp_buf[0] = 0x70; | |
0f113f3e | 2740 | # endif |
0f113f3e | 2741 | |
13c0ec4a | 2742 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2743 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2744 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2745 | goto err; | |
b9908bf9 | 2746 | } |
13c0ec4a MC |
2747 | |
2748 | s->s3->tmp.pms = pms; | |
2749 | s->s3->tmp.pmslen = pmslen; | |
2750 | ||
2faa1b48 CB |
2751 | /* Log the premaster secret, if logging is enabled. */ |
2752 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2753 | goto err; | |
2754 | ||
13c0ec4a MC |
2755 | return 1; |
2756 | err: | |
2757 | OPENSSL_clear_free(pms, pmslen); | |
2758 | EVP_PKEY_CTX_free(pctx); | |
2759 | ||
2760 | return 0; | |
2761 | #else | |
05ec6a25 | 2762 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2763 | *al = SSL_AD_INTERNAL_ERROR; |
2764 | return 0; | |
f9b3bff6 | 2765 | #endif |
13c0ec4a MC |
2766 | } |
2767 | ||
f1ec23c0 | 2768 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2769 | { |
2770 | #ifndef OPENSSL_NO_DH | |
2771 | DH *dh_clnt = NULL; | |
2772 | const BIGNUM *pub_key; | |
2773 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2774 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2775 | |
2776 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2777 | if (skey == NULL) |
2778 | goto err; | |
2779 | ||
0a699a07 | 2780 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2781 | if (ckey == NULL) |
2782 | goto err; | |
2783 | ||
a8c1c704 MC |
2784 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2785 | ||
0f1e51ea | 2786 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2787 | goto err; |
a8c1c704 MC |
2788 | |
2789 | /* send off the data */ | |
2790 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2791 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2792 | goto err; |
2793 | ||
2794 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2795 | EVP_PKEY_free(ckey); |
2796 | ||
2797 | return 1; | |
f1ec23c0 MC |
2798 | err: |
2799 | EVP_PKEY_free(ckey); | |
2800 | #endif | |
05ec6a25 | 2801 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2802 | *al = SSL_AD_INTERNAL_ERROR; |
2803 | return 0; | |
a8c1c704 MC |
2804 | } |
2805 | ||
f1ec23c0 | 2806 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2807 | { |
2808 | #ifndef OPENSSL_NO_EC | |
2809 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2810 | size_t encoded_pt_len = 0; |
67ad5aab | 2811 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2812 | int ret = 0; |
67ad5aab MC |
2813 | |
2814 | skey = s->s3->peer_tmp; | |
ec24630a | 2815 | if (skey == NULL) { |
05ec6a25 | 2816 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2817 | return 0; |
2818 | } | |
2819 | ||
0a699a07 | 2820 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2821 | if (ckey == NULL) { |
2822 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2823 | goto err; | |
2824 | } | |
67ad5aab | 2825 | |
0f1e51ea | 2826 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2827 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2828 | goto err; |
2829 | } | |
2830 | ||
2831 | /* Generate encoding of client key */ | |
ec24630a | 2832 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2833 | |
2834 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2835 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2836 | goto err; |
2837 | } | |
2838 | ||
b2b3024e | 2839 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2840 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2841 | goto err; | |
2842 | } | |
67ad5aab | 2843 | |
f1ec23c0 | 2844 | ret = 1; |
67ad5aab | 2845 | err: |
f1ec23c0 | 2846 | OPENSSL_free(encodedPoint); |
67ad5aab | 2847 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2848 | return ret; |
67ad5aab | 2849 | #else |
05ec6a25 | 2850 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2851 | *al = SSL_AD_INTERNAL_ERROR; |
2852 | return 0; | |
2853 | #endif | |
2854 | } | |
2855 | ||
f1ec23c0 | 2856 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2857 | { |
2858 | #ifndef OPENSSL_NO_GOST | |
2859 | /* GOST key exchange message creation */ | |
2860 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2861 | X509 *peer_cert; | |
2862 | size_t msglen; | |
2863 | unsigned int md_len; | |
2864 | unsigned char shared_ukm[32], tmp[256]; | |
2865 | EVP_MD_CTX *ukm_hash = NULL; | |
2866 | int dgst_nid = NID_id_GostR3411_94; | |
2867 | unsigned char *pms = NULL; | |
2868 | size_t pmslen = 0; | |
2869 | ||
2870 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2871 | dgst_nid = NID_id_GostR3411_2012_256; | |
2872 | ||
2873 | /* | |
2874 | * Get server sertificate PKEY and create ctx from it | |
2875 | */ | |
2876 | peer_cert = s->session->peer; | |
2877 | if (!peer_cert) { | |
2878 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2879 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2880 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2881 | return 0; | |
2882 | } | |
2883 | ||
2884 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2885 | if (pkey_ctx == NULL) { | |
2886 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2887 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2888 | return 0; |
2889 | } | |
2890 | /* | |
2891 | * If we have send a certificate, and certificate key | |
2892 | * parameters match those of server certificate, use | |
2893 | * certificate key for key exchange | |
2894 | */ | |
2895 | ||
2896 | /* Otherwise, generate ephemeral key pair */ | |
2897 | pmslen = 32; | |
2898 | pms = OPENSSL_malloc(pmslen); | |
2899 | if (pms == NULL) { | |
2900 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2901 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2902 | goto err; |
e00e0b3d MC |
2903 | } |
2904 | ||
2905 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2906 | /* Generate session key |
2907 | * TODO(size_t): Convert this function | |
2908 | */ | |
2909 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2910 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2911 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2912 | goto err; |
2913 | }; | |
e00e0b3d MC |
2914 | /* |
2915 | * Compute shared IV and store it in algorithm-specific context | |
2916 | * data | |
2917 | */ | |
2918 | ukm_hash = EVP_MD_CTX_new(); | |
2919 | if (ukm_hash == NULL | |
a230b26e EK |
2920 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2921 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2922 | SSL3_RANDOM_SIZE) <= 0 | |
2923 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2924 | SSL3_RANDOM_SIZE) <= 0 | |
2925 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2926 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2927 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2928 | goto err; |
2929 | } | |
2930 | EVP_MD_CTX_free(ukm_hash); | |
2931 | ukm_hash = NULL; | |
2932 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2933 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2934 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2935 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2936 | goto err; |
2937 | } | |
2938 | /* Make GOST keytransport blob message */ | |
2939 | /* | |
2940 | * Encapsulate it into sequence | |
2941 | */ | |
e00e0b3d MC |
2942 | msglen = 255; |
2943 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2944 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2945 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2946 | goto err; |
2947 | } | |
f1ec23c0 | 2948 | |
08029dfa MC |
2949 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2950 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2951 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2952 | *al = SSL_AD_INTERNAL_ERROR; |
2953 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2954 | goto err; | |
e00e0b3d | 2955 | } |
f1ec23c0 | 2956 | |
e00e0b3d MC |
2957 | EVP_PKEY_CTX_free(pkey_ctx); |
2958 | s->s3->tmp.pms = pms; | |
2959 | s->s3->tmp.pmslen = pmslen; | |
2960 | ||
2961 | return 1; | |
2962 | err: | |
2963 | EVP_PKEY_CTX_free(pkey_ctx); | |
2964 | OPENSSL_clear_free(pms, pmslen); | |
2965 | EVP_MD_CTX_free(ukm_hash); | |
2966 | return 0; | |
2967 | #else | |
05ec6a25 | 2968 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2969 | *al = SSL_AD_INTERNAL_ERROR; |
2970 | return 0; | |
2971 | #endif | |
2972 | } | |
2973 | ||
f1ec23c0 | 2974 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2975 | { |
8b9546c7 | 2976 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2977 | unsigned char *abytes = NULL; |
2978 | ||
2979 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2980 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2981 | &abytes)) { | |
05ec6a25 | 2982 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2983 | return 0; |
2984 | } | |
f1ec23c0 MC |
2985 | BN_bn2bin(s->srp_ctx.A, abytes); |
2986 | ||
840a2bf8 MC |
2987 | OPENSSL_free(s->session->srp_username); |
2988 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2989 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2990 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2991 | return 0; |
2992 | } | |
2993 | ||
2994 | return 1; | |
2995 | #else | |
05ec6a25 | 2996 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2997 | *al = SSL_AD_INTERNAL_ERROR; |
2998 | return 0; | |
2999 | #endif | |
3000 | } | |
3001 | ||
7cea05dc | 3002 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3003 | { |
13c0ec4a MC |
3004 | unsigned long alg_k; |
3005 | int al = -1; | |
3006 | ||
f1ec23c0 | 3007 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3008 | |
13c0ec4a | 3009 | if ((alg_k & SSL_PSK) |
7cea05dc | 3010 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3011 | goto err; |
3012 | ||
f1ec23c0 | 3013 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3014 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3015 | goto err; |
a8c1c704 | 3016 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3017 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3018 | goto err; |
67ad5aab | 3019 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3020 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3021 | goto err; |
e00e0b3d | 3022 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3023 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3024 | goto err; |
840a2bf8 | 3025 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3026 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3027 | goto err; |
4a424545 | 3028 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3029 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3030 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3031 | goto err; | |
3032 | } | |
3033 | ||
b9908bf9 | 3034 | return 1; |
0f113f3e | 3035 | err: |
13c0ec4a MC |
3036 | if (al != -1) |
3037 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3038 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3039 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3040 | #ifndef OPENSSL_NO_PSK |
3041 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3042 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3043 | #endif |
b9908bf9 MC |
3044 | return 0; |
3045 | } | |
3046 | ||
3047 | int tls_client_key_exchange_post_work(SSL *s) | |
3048 | { | |
3049 | unsigned char *pms = NULL; | |
3050 | size_t pmslen = 0; | |
3051 | ||
6f137370 MC |
3052 | pms = s->s3->tmp.pms; |
3053 | pmslen = s->s3->tmp.pmslen; | |
3054 | ||
b9908bf9 MC |
3055 | #ifndef OPENSSL_NO_SRP |
3056 | /* Check for SRP */ | |
3057 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3058 | if (!srp_generate_client_master_secret(s)) { | |
3059 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3060 | ERR_R_INTERNAL_ERROR); | |
3061 | goto err; | |
3062 | } | |
3063 | return 1; | |
3064 | } | |
3065 | #endif | |
b9908bf9 MC |
3066 | |
3067 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3068 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3069 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3070 | goto err; | |
3071 | } | |
3072 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3073 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3074 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3075 | /* ssl_generate_master_secret frees the pms even on error */ |
3076 | pms = NULL; | |
3077 | pmslen = 0; | |
b9908bf9 MC |
3078 | goto err; |
3079 | } | |
6f137370 MC |
3080 | pms = NULL; |
3081 | pmslen = 0; | |
473483d4 MC |
3082 | |
3083 | #ifndef OPENSSL_NO_SCTP | |
3084 | if (SSL_IS_DTLS(s)) { | |
3085 | unsigned char sctpauthkey[64]; | |
3086 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3087 | ||
3088 | /* | |
3089 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3090 | * used. | |
3091 | */ | |
141eb8c6 MC |
3092 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3093 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3094 | |
3095 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3096 | sizeof(sctpauthkey), labelbuffer, |
3097 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3098 | goto err; |
3099 | ||
3100 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3101 | sizeof(sctpauthkey), sctpauthkey); | |
3102 | } | |
3103 | #endif | |
3104 | ||
b9908bf9 MC |
3105 | return 1; |
3106 | err: | |
3107 | OPENSSL_clear_free(pms, pmslen); | |
3108 | s->s3->tmp.pms = NULL; | |
3109 | return 0; | |
0f113f3e | 3110 | } |
d02b48c6 | 3111 | |
0f113f3e MC |
3112 | /* |
3113 | * Check a certificate can be used for client authentication. Currently check | |
3114 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3115 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3116 | */ |
3117 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3118 | { |
0f113f3e | 3119 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3120 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3121 | return 0; |
3122 | /* | |
3123 | * If strict mode check suitability of chain before using it. This also | |
3124 | * adjusts suite B digest if necessary. | |
3125 | */ | |
3126 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3127 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3128 | return 0; | |
0f113f3e MC |
3129 | return 1; |
3130 | } | |
0d609395 | 3131 | |
be3583fa | 3132 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3133 | { |
3134 | X509 *x509 = NULL; | |
3135 | EVP_PKEY *pkey = NULL; | |
3136 | int i; | |
3137 | ||
b9908bf9 | 3138 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3139 | /* Let cert callback update client certificates if required */ |
3140 | if (s->cert->cert_cb) { | |
3141 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3142 | if (i < 0) { | |
3143 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3144 | return WORK_MORE_A; |
0f113f3e MC |
3145 | } |
3146 | if (i == 0) { | |
3147 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3148 | ossl_statem_set_error(s); |
0f113f3e MC |
3149 | return 0; |
3150 | } | |
3151 | s->rwstate = SSL_NOTHING; | |
3152 | } | |
3153 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3154 | return WORK_FINISHED_CONTINUE; |
3155 | ||
3156 | /* Fall through to WORK_MORE_B */ | |
3157 | wst = WORK_MORE_B; | |
0f113f3e MC |
3158 | } |
3159 | ||
3160 | /* We need to get a client cert */ | |
b9908bf9 | 3161 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3162 | /* |
3163 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3164 | * return(-1); We then get retied later | |
3165 | */ | |
0f113f3e MC |
3166 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3167 | if (i < 0) { | |
3168 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3169 | return WORK_MORE_B; |
0f113f3e MC |
3170 | } |
3171 | s->rwstate = SSL_NOTHING; | |
3172 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3173 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3174 | i = 0; | |
3175 | } else if (i == 1) { | |
3176 | i = 0; | |
b9908bf9 | 3177 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3178 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3179 | } | |
3180 | ||
222561fe | 3181 | X509_free(x509); |
25aaa98a | 3182 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3183 | if (i && !ssl3_check_client_certificate(s)) |
3184 | i = 0; | |
3185 | if (i == 0) { | |
3186 | if (s->version == SSL3_VERSION) { | |
3187 | s->s3->tmp.cert_req = 0; | |
3188 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3189 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3190 | } else { |
3191 | s->s3->tmp.cert_req = 2; | |
124037fd | 3192 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3193 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3194 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3195 | return 0; |
3196 | } | |
0f113f3e MC |
3197 | } |
3198 | } | |
3199 | ||
b9908bf9 | 3200 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3201 | } |
3202 | ||
b9908bf9 MC |
3203 | /* Shouldn't ever get here */ |
3204 | return WORK_ERROR; | |
3205 | } | |
3206 | ||
7cea05dc | 3207 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3208 | { |
0baed5e9 | 3209 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3210 | |
3211 | /* | |
3212 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3213 | * later | |
3214 | */ | |
3215 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3216 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3217 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3218 | : s->cert->key, |
3219 | &al)) { | |
b9908bf9 | 3220 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3221 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3222 | return 0; |
0f113f3e | 3223 | } |
b9908bf9 MC |
3224 | |
3225 | return 1; | |
0f113f3e MC |
3226 | } |
3227 | ||
3228 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3229 | |
36d16f8e | 3230 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3231 | { |
60f43e9e RL |
3232 | int i; |
3233 | #ifndef OPENSSL_NO_EC | |
3234 | int idx; | |
3235 | #endif | |
0f113f3e MC |
3236 | long alg_k, alg_a; |
3237 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3238 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3239 | |
0f113f3e MC |
3240 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3241 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3242 | |
0f113f3e | 3243 | /* we don't have a certificate */ |
55a9a16f | 3244 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3245 | return (1); |
d02b48c6 | 3246 | |
0f113f3e | 3247 | /* This is the passed certificate */ |
d02b48c6 | 3248 | |
10bf4fc2 | 3249 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3250 | idx = s->session->peer_type; |
0f113f3e | 3251 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3252 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3253 | /* check failed */ |
3254 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3255 | goto f_err; | |
3256 | } else { | |
3257 | return 1; | |
3258 | } | |
3259 | } else if (alg_a & SSL_aECDSA) { | |
3260 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3261 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3262 | goto f_err; | |
0f113f3e MC |
3263 | } |
3264 | #endif | |
8382fd3a | 3265 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3266 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3267 | |
3268 | /* Check that we have a certificate if we require one */ | |
3269 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3270 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3271 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3272 | goto f_err; | |
3273 | } | |
bc36ee62 | 3274 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3275 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3276 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3277 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3278 | goto f_err; | |
3279 | } | |
d02b48c6 | 3280 | #endif |
bc36ee62 | 3281 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3282 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3283 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3284 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3285 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3286 | goto f_err; | |
0f113f3e | 3287 | } |
79df9d62 | 3288 | #endif |
bc36ee62 | 3289 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3290 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3291 | al = SSL_AD_INTERNAL_ERROR; |
3292 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3293 | goto f_err; |
0f113f3e | 3294 | } |
d02b48c6 RE |
3295 | #endif |
3296 | ||
0f113f3e MC |
3297 | return (1); |
3298 | f_err: | |
26c79d56 | 3299 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3300 | return (0); |
3301 | } | |
3302 | ||
e481f9b9 | 3303 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3304 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3305 | { |
15e6be6c MC |
3306 | size_t len, padding_len; |
3307 | unsigned char *padding = NULL; | |
15e6be6c | 3308 | |
aff8c126 | 3309 | len = s->ext.npn_len; |
b9908bf9 | 3310 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3311 | |
aff8c126 | 3312 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3313 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3314 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3315 | goto err; | |
3316 | } | |
3317 | ||
3318 | memset(padding, 0, padding_len); | |
3319 | ||
b9908bf9 | 3320 | return 1; |
15e6be6c | 3321 | err: |
15e6be6c MC |
3322 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3323 | return 0; | |
b9908bf9 | 3324 | } |
6434abbf | 3325 | #endif |
368888bc | 3326 | |
c7f47786 MC |
3327 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3328 | { | |
3329 | if (PACKET_remaining(pkt) > 0) { | |
3330 | /* should contain no data */ | |
3331 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3332 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3333 | ossl_statem_set_error(s); | |
3334 | return MSG_PROCESS_ERROR; | |
3335 | } | |
3336 | ||
3337 | /* | |
1f04f23e MC |
3338 | * This is a historical discrepancy (not in the RFC) maintained for |
3339 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3340 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3341 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3342 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3343 | */ |
3344 | if (SSL_IS_DTLS(s)) | |
3345 | SSL_renegotiate(s); | |
3346 | else | |
3347 | SSL_renegotiate_abbreviated(s); | |
3348 | ||
3349 | return MSG_PROCESS_FINISHED_READING; | |
3350 | } | |
3351 | ||
e46f2334 MC |
3352 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3353 | { | |
3354 | int al = SSL_AD_INTERNAL_ERROR; | |
3355 | PACKET extensions; | |
3434f40b | 3356 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3357 | |
e46f2334 MC |
3358 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3359 | al = SSL_AD_DECODE_ERROR; | |
3360 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3361 | goto err; | |
3362 | } | |
3363 | ||
e96e0f8e | 3364 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
fc5ece2e | 3365 | &rawexts, &al, NULL) |
e96e0f8e | 3366 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3367 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3368 | goto err; |
3369 | ||
1b0286a3 | 3370 | OPENSSL_free(rawexts); |
e46f2334 MC |
3371 | return MSG_PROCESS_CONTINUE_READING; |
3372 | ||
3373 | err: | |
3374 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3375 | ossl_statem_set_error(s); | |
1b0286a3 | 3376 | OPENSSL_free(rawexts); |
e46f2334 MC |
3377 | return MSG_PROCESS_ERROR; |
3378 | } | |
3379 | ||
368888bc | 3380 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3381 | { |
3382 | int i = 0; | |
368888bc | 3383 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3384 | if (s->ctx->client_cert_engine) { |
3385 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3386 | SSL_get_client_CA_list(s), | |
3387 | px509, ppkey, NULL, NULL, NULL); | |
3388 | if (i != 0) | |
3389 | return i; | |
3390 | } | |
3391 | #endif | |
3392 | if (s->ctx->client_cert_cb) | |
3393 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3394 | return i; | |
3395 | } | |
d45ba43d | 3396 | |
ae2f7b37 | 3397 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3398 | { |
2c7b4dbc MC |
3399 | int i; |
3400 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3401 | int empty_reneg_info_scsv = !s->renegotiate; |
3402 | /* Set disabled masks for this session */ | |
3403 | ssl_set_client_disabled(s); | |
3404 | ||
3405 | if (sk == NULL) | |
3406 | return (0); | |
d45ba43d | 3407 | |
2c7b4dbc MC |
3408 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3409 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3410 | # error Max cipher length too short | |
3411 | # endif | |
3412 | /* | |
3413 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3414 | * chop number of supported ciphers to keep it well below this if we | |
3415 | * use TLS v1.2 | |
3416 | */ | |
3417 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3418 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3419 | else | |
3420 | #endif | |
3421 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3422 | maxlen = 0xfffe; | |
3423 | ||
3424 | if (empty_reneg_info_scsv) | |
3425 | maxlen -= 2; | |
3426 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3427 | maxlen -= 2; | |
3428 | ||
3429 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3430 | const SSL_CIPHER *c; | |
3431 | ||
d45ba43d MC |
3432 | c = sk_SSL_CIPHER_value(sk, i); |
3433 | /* Skip disabled ciphers */ | |
3434 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3435 | continue; | |
2c7b4dbc MC |
3436 | |
3437 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3438 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3439 | return 0; | |
3440 | } | |
3441 | ||
3442 | totlen += len; | |
d45ba43d | 3443 | } |
2c7b4dbc MC |
3444 | |
3445 | if (totlen == 0) { | |
3446 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3447 | return 0; | |
3448 | } | |
3449 | ||
3450 | if (totlen != 0) { | |
d45ba43d MC |
3451 | if (empty_reneg_info_scsv) { |
3452 | static SSL_CIPHER scsv = { | |
3453 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3454 | }; | |
2c7b4dbc MC |
3455 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3456 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3457 | return 0; | |
3458 | } | |
d45ba43d MC |
3459 | } |
3460 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3461 | static SSL_CIPHER scsv = { | |
3462 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3463 | }; | |
2c7b4dbc MC |
3464 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3465 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3466 | return 0; | |
3467 | } | |
d45ba43d MC |
3468 | } |
3469 | } | |
3470 | ||
2c7b4dbc | 3471 | return 1; |
d45ba43d | 3472 | } |