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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 | ||
94ed2c67 MC |
408 | /* |
409 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
410 | * we will update this to look more like real TLSv1.3 | |
411 | */ | |
412 | ||
0f1e51ea | 413 | /* |
3847d426 MC |
414 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
415 | * TLSv1.3 yet at that point. They are handled by | |
416 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
417 | */ |
418 | switch (st->hand_state) { | |
419 | default: | |
420 | /* Shouldn't happen */ | |
421 | return WRITE_TRAN_ERROR; | |
422 | ||
3847d426 MC |
423 | case TLS_ST_CW_CLNT_HELLO: |
424 | /* We only hit this in the case of HelloRetryRequest */ | |
425 | return WRITE_TRAN_FINISHED; | |
426 | ||
427 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
428 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
429 | return WRITE_TRAN_CONTINUE; | |
430 | ||
92760c21 | 431 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 432 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 433 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
434 | return WRITE_TRAN_CONTINUE; |
435 | ||
436 | case TLS_ST_CW_CERT: | |
437 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 438 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 439 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
440 | return WRITE_TRAN_CONTINUE; |
441 | ||
442 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
443 | st->hand_state = TLS_ST_CW_FINISHED; |
444 | return WRITE_TRAN_CONTINUE; | |
445 | ||
e1c3de44 | 446 | case TLS_ST_CR_KEY_UPDATE: |
cc2455bf | 447 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 448 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
449 | st->hand_state = TLS_ST_OK; |
450 | ossl_statem_set_in_init(s, 0); | |
451 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
452 | |
453 | case TLS_ST_OK: | |
454 | /* Just go straight to trying to read from the server */ | |
455 | return WRITE_TRAN_FINISHED; | |
0f1e51ea MC |
456 | } |
457 | } | |
458 | ||
459 | /* | |
460 | * ossl_statem_client_write_transition() works out what handshake state to | |
461 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 462 | */ |
8481f583 | 463 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 464 | { |
d6f1a6e9 | 465 | OSSL_STATEM *st = &s->statem; |
61ae935a | 466 | |
0f1e51ea MC |
467 | /* |
468 | * Note that immediately before/after a ClientHello we don't know what | |
469 | * version we are going to negotiate yet, so we don't take this branch until | |
470 | * later | |
471 | */ | |
f5ca0b04 | 472 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
473 | return ossl_statem_client13_write_transition(s); |
474 | ||
a230b26e | 475 | switch (st->hand_state) { |
f3b3d7f0 RS |
476 | default: |
477 | /* Shouldn't happen */ | |
478 | return WRITE_TRAN_ERROR; | |
479 | ||
a230b26e | 480 | case TLS_ST_OK: |
c7f47786 MC |
481 | if (!s->renegotiate) { |
482 | /* | |
483 | * We haven't requested a renegotiation ourselves so we must have | |
484 | * received a message from the server. Better read it. | |
485 | */ | |
486 | return WRITE_TRAN_FINISHED; | |
487 | } | |
a230b26e EK |
488 | /* Renegotiation - fall through */ |
489 | case TLS_ST_BEFORE: | |
490 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
491 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 492 | |
a230b26e EK |
493 | case TLS_ST_CW_CLNT_HELLO: |
494 | /* | |
495 | * No transition at the end of writing because we don't know what | |
496 | * we will be sent | |
497 | */ | |
498 | return WRITE_TRAN_FINISHED; | |
61ae935a | 499 | |
a230b26e EK |
500 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
501 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
502 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 503 | |
a230b26e EK |
504 | case TLS_ST_CR_SRVR_DONE: |
505 | if (s->s3->tmp.cert_req) | |
506 | st->hand_state = TLS_ST_CW_CERT; | |
507 | else | |
61ae935a | 508 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 509 | return WRITE_TRAN_CONTINUE; |
61ae935a | 510 | |
a230b26e EK |
511 | case TLS_ST_CW_CERT: |
512 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
513 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 514 | |
a230b26e EK |
515 | case TLS_ST_CW_KEY_EXCH: |
516 | /* | |
517 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
518 | * sent, but no verify packet is sent | |
519 | */ | |
520 | /* | |
521 | * XXX: For now, we do not support client authentication in ECDH | |
522 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
523 | * need to skip the certificate verify message when client's | |
524 | * ECDH public key is sent inside the client certificate. | |
525 | */ | |
526 | if (s->s3->tmp.cert_req == 1) { | |
527 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
528 | } else { | |
61ae935a | 529 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
530 | } |
531 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
532 | st->hand_state = TLS_ST_CW_CHANGE; | |
533 | } | |
534 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 535 | |
a230b26e EK |
536 | case TLS_ST_CW_CERT_VRFY: |
537 | st->hand_state = TLS_ST_CW_CHANGE; | |
538 | return WRITE_TRAN_CONTINUE; | |
539 | ||
540 | case TLS_ST_CW_CHANGE: | |
61ae935a | 541 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 542 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 543 | #else |
aff8c126 | 544 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
545 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
546 | else | |
547 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 548 | #endif |
a230b26e | 549 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
550 | |
551 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
552 | case TLS_ST_CW_NEXT_PROTO: |
553 | st->hand_state = TLS_ST_CW_FINISHED; | |
554 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
555 | #endif |
556 | ||
a230b26e EK |
557 | case TLS_ST_CW_FINISHED: |
558 | if (s->hit) { | |
559 | st->hand_state = TLS_ST_OK; | |
560 | ossl_statem_set_in_init(s, 0); | |
561 | return WRITE_TRAN_CONTINUE; | |
562 | } else { | |
563 | return WRITE_TRAN_FINISHED; | |
564 | } | |
61ae935a | 565 | |
a230b26e EK |
566 | case TLS_ST_CR_FINISHED: |
567 | if (s->hit) { | |
568 | st->hand_state = TLS_ST_CW_CHANGE; | |
569 | return WRITE_TRAN_CONTINUE; | |
570 | } else { | |
571 | st->hand_state = TLS_ST_OK; | |
572 | ossl_statem_set_in_init(s, 0); | |
573 | return WRITE_TRAN_CONTINUE; | |
574 | } | |
c7f47786 MC |
575 | |
576 | case TLS_ST_CR_HELLO_REQ: | |
577 | /* | |
578 | * If we can renegotiate now then do so, otherwise wait for a more | |
579 | * convenient time. | |
580 | */ | |
581 | if (ssl3_renegotiate_check(s, 1)) { | |
582 | if (!tls_setup_handshake(s)) { | |
583 | ossl_statem_set_error(s); | |
584 | return WRITE_TRAN_ERROR; | |
585 | } | |
586 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
587 | return WRITE_TRAN_CONTINUE; | |
588 | } | |
589 | st->hand_state = TLS_ST_OK; | |
590 | ossl_statem_set_in_init(s, 0); | |
591 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
592 | } |
593 | } | |
594 | ||
595 | /* | |
596 | * Perform any pre work that needs to be done prior to sending a message from | |
597 | * the client to the server. | |
598 | */ | |
8481f583 | 599 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 600 | { |
d6f1a6e9 | 601 | OSSL_STATEM *st = &s->statem; |
61ae935a | 602 | |
a230b26e | 603 | switch (st->hand_state) { |
f3b3d7f0 RS |
604 | default: |
605 | /* No pre work to be done */ | |
606 | break; | |
607 | ||
61ae935a MC |
608 | case TLS_ST_CW_CLNT_HELLO: |
609 | s->shutdown = 0; | |
610 | if (SSL_IS_DTLS(s)) { | |
611 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
612 | if (!ssl3_init_finished_mac(s)) { |
613 | ossl_statem_set_error(s); | |
614 | return WORK_ERROR; | |
615 | } | |
61ae935a MC |
616 | } |
617 | break; | |
618 | ||
61ae935a MC |
619 | case TLS_ST_CW_CHANGE: |
620 | if (SSL_IS_DTLS(s)) { | |
621 | if (s->hit) { | |
622 | /* | |
623 | * We're into the last flight so we don't retransmit these | |
624 | * messages unless we need to. | |
625 | */ | |
626 | st->use_timer = 0; | |
627 | } | |
628 | #ifndef OPENSSL_NO_SCTP | |
629 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
630 | return dtls_wait_for_dry(s); | |
631 | #endif | |
632 | } | |
f3b3d7f0 | 633 | break; |
61ae935a MC |
634 | |
635 | case TLS_ST_OK: | |
30f05b19 | 636 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
637 | } |
638 | ||
639 | return WORK_FINISHED_CONTINUE; | |
640 | } | |
641 | ||
642 | /* | |
643 | * Perform any work that needs to be done after sending a message from the | |
644 | * client to the server. | |
2c5dfdc3 MC |
645 | case TLS_ST_SR_CERT_VRFY: |
646 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 647 | */ |
8481f583 | 648 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 649 | { |
d6f1a6e9 | 650 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
651 | |
652 | s->init_num = 0; | |
653 | ||
a230b26e | 654 | switch (st->hand_state) { |
f3b3d7f0 RS |
655 | default: |
656 | /* No post work to be done */ | |
657 | break; | |
658 | ||
61ae935a | 659 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 660 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 661 | return WORK_MORE_A; |
46417569 | 662 | |
61ae935a MC |
663 | if (SSL_IS_DTLS(s)) { |
664 | /* Treat the next message as the first packet */ | |
665 | s->first_packet = 1; | |
666 | } | |
667 | break; | |
668 | ||
669 | case TLS_ST_CW_KEY_EXCH: | |
670 | if (tls_client_key_exchange_post_work(s) == 0) | |
671 | return WORK_ERROR; | |
672 | break; | |
673 | ||
674 | case TLS_ST_CW_CHANGE: | |
675 | s->session->cipher = s->s3->tmp.new_cipher; | |
676 | #ifdef OPENSSL_NO_COMP | |
677 | s->session->compress_meth = 0; | |
678 | #else | |
679 | if (s->s3->tmp.new_compression == NULL) | |
680 | s->session->compress_meth = 0; | |
681 | else | |
682 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
683 | #endif | |
684 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
685 | return WORK_ERROR; | |
686 | ||
687 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
688 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
689 | return WORK_ERROR; | |
690 | ||
691 | if (SSL_IS_DTLS(s)) { | |
692 | #ifndef OPENSSL_NO_SCTP | |
693 | if (s->hit) { | |
694 | /* | |
695 | * Change to new shared key of SCTP-Auth, will be ignored if | |
696 | * no SCTP used. | |
697 | */ | |
698 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
699 | 0, NULL); | |
700 | } | |
701 | #endif | |
702 | ||
703 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
704 | } | |
705 | break; | |
706 | ||
707 | case TLS_ST_CW_FINISHED: | |
708 | #ifndef OPENSSL_NO_SCTP | |
709 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
710 | /* | |
711 | * Change to new shared key of SCTP-Auth, will be ignored if | |
712 | * no SCTP used. | |
713 | */ | |
714 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
715 | 0, NULL); | |
716 | } | |
717 | #endif | |
718 | if (statem_flush(s) != 1) | |
719 | return WORK_MORE_B; | |
92760c21 MC |
720 | |
721 | if (SSL_IS_TLS13(s)) { | |
722 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
723 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
724 | return WORK_ERROR; | |
725 | } | |
61ae935a | 726 | break; |
61ae935a MC |
727 | } |
728 | ||
729 | return WORK_FINISHED_CONTINUE; | |
730 | } | |
731 | ||
732 | /* | |
6392fb8e MC |
733 | * Get the message construction function and message type for sending from the |
734 | * client | |
61ae935a MC |
735 | * |
736 | * Valid return values are: | |
737 | * 1: Success | |
738 | * 0: Error | |
739 | */ | |
6392fb8e | 740 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 741 | confunc_f *confunc, int *mt) |
61ae935a | 742 | { |
d6f1a6e9 | 743 | OSSL_STATEM *st = &s->statem; |
61ae935a | 744 | |
4a01c59f MC |
745 | switch (st->hand_state) { |
746 | default: | |
747 | /* Shouldn't happen */ | |
748 | return 0; | |
749 | ||
750 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 751 | if (SSL_IS_DTLS(s)) |
6392fb8e | 752 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 753 | else |
6392fb8e MC |
754 | *confunc = tls_construct_change_cipher_spec; |
755 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
756 | break; |
757 | ||
758 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
759 | *confunc = tls_construct_client_hello; |
760 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
761 | break; |
762 | ||
763 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
764 | *confunc = tls_construct_client_certificate; |
765 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
766 | break; |
767 | ||
768 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
769 | *confunc = tls_construct_client_key_exchange; |
770 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
771 | break; |
772 | ||
773 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 774 | *confunc = tls_construct_cert_verify; |
6392fb8e | 775 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 776 | break; |
61ae935a MC |
777 | |
778 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 779 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
780 | *confunc = tls_construct_next_proto; |
781 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 782 | break; |
61ae935a | 783 | #endif |
4a01c59f | 784 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
785 | *confunc = tls_construct_finished; |
786 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
787 | break; |
788 | } | |
5923ad4b | 789 | |
5923ad4b | 790 | return 1; |
61ae935a MC |
791 | } |
792 | ||
793 | /* | |
794 | * Returns the maximum allowed length for the current message that we are | |
795 | * reading. Excludes the message header. | |
796 | */ | |
eda75751 | 797 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 798 | { |
d6f1a6e9 | 799 | OSSL_STATEM *st = &s->statem; |
61ae935a | 800 | |
a230b26e | 801 | switch (st->hand_state) { |
f3b3d7f0 RS |
802 | default: |
803 | /* Shouldn't happen */ | |
804 | return 0; | |
805 | ||
a230b26e EK |
806 | case TLS_ST_CR_SRVR_HELLO: |
807 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 808 | |
a230b26e EK |
809 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
810 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 811 | |
3847d426 MC |
812 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
813 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
814 | ||
a230b26e EK |
815 | case TLS_ST_CR_CERT: |
816 | return s->max_cert_list; | |
61ae935a | 817 | |
2c5dfdc3 MC |
818 | case TLS_ST_CR_CERT_VRFY: |
819 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
820 | ||
a230b26e EK |
821 | case TLS_ST_CR_CERT_STATUS: |
822 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 823 | |
a230b26e EK |
824 | case TLS_ST_CR_KEY_EXCH: |
825 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 826 | |
a230b26e EK |
827 | case TLS_ST_CR_CERT_REQ: |
828 | /* | |
829 | * Set to s->max_cert_list for compatibility with previous releases. In | |
830 | * practice these messages can get quite long if servers are configured | |
831 | * to provide a long list of acceptable CAs | |
832 | */ | |
833 | return s->max_cert_list; | |
61ae935a | 834 | |
a230b26e EK |
835 | case TLS_ST_CR_SRVR_DONE: |
836 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 837 | |
a230b26e EK |
838 | case TLS_ST_CR_CHANGE: |
839 | if (s->version == DTLS1_BAD_VER) | |
840 | return 3; | |
841 | return CCS_MAX_LENGTH; | |
61ae935a | 842 | |
a230b26e EK |
843 | case TLS_ST_CR_SESSION_TICKET: |
844 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 845 | |
a230b26e EK |
846 | case TLS_ST_CR_FINISHED: |
847 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
848 | |
849 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
850 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
851 | |
852 | case TLS_ST_CR_KEY_UPDATE: | |
853 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 854 | } |
61ae935a MC |
855 | } |
856 | ||
857 | /* | |
858 | * Process a message that the client has been received from the server. | |
859 | */ | |
8481f583 | 860 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 861 | { |
d6f1a6e9 | 862 | OSSL_STATEM *st = &s->statem; |
61ae935a | 863 | |
a230b26e | 864 | switch (st->hand_state) { |
f3b3d7f0 RS |
865 | default: |
866 | /* Shouldn't happen */ | |
867 | return MSG_PROCESS_ERROR; | |
868 | ||
a230b26e EK |
869 | case TLS_ST_CR_SRVR_HELLO: |
870 | return tls_process_server_hello(s, pkt); | |
61ae935a | 871 | |
a230b26e EK |
872 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
873 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 874 | |
3847d426 MC |
875 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
876 | return tls_process_hello_retry_request(s, pkt); | |
877 | ||
a230b26e EK |
878 | case TLS_ST_CR_CERT: |
879 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 880 | |
2c5dfdc3 MC |
881 | case TLS_ST_CR_CERT_VRFY: |
882 | return tls_process_cert_verify(s, pkt); | |
883 | ||
a230b26e EK |
884 | case TLS_ST_CR_CERT_STATUS: |
885 | return tls_process_cert_status(s, pkt); | |
61ae935a | 886 | |
a230b26e EK |
887 | case TLS_ST_CR_KEY_EXCH: |
888 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 889 | |
a230b26e EK |
890 | case TLS_ST_CR_CERT_REQ: |
891 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 892 | |
a230b26e EK |
893 | case TLS_ST_CR_SRVR_DONE: |
894 | return tls_process_server_done(s, pkt); | |
61ae935a | 895 | |
a230b26e EK |
896 | case TLS_ST_CR_CHANGE: |
897 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 898 | |
a230b26e EK |
899 | case TLS_ST_CR_SESSION_TICKET: |
900 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 901 | |
a230b26e EK |
902 | case TLS_ST_CR_FINISHED: |
903 | return tls_process_finished(s, pkt); | |
e46f2334 | 904 | |
c7f47786 MC |
905 | case TLS_ST_CR_HELLO_REQ: |
906 | return tls_process_hello_req(s, pkt); | |
907 | ||
e46f2334 MC |
908 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
909 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
910 | |
911 | case TLS_ST_CR_KEY_UPDATE: | |
912 | return tls_process_key_update(s, pkt); | |
61ae935a | 913 | } |
61ae935a MC |
914 | } |
915 | ||
916 | /* | |
917 | * Perform any further processing required following the receipt of a message | |
918 | * from the server | |
919 | */ | |
8481f583 | 920 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 921 | { |
d6f1a6e9 | 922 | OSSL_STATEM *st = &s->statem; |
61ae935a | 923 | |
a230b26e | 924 | switch (st->hand_state) { |
f3b3d7f0 RS |
925 | default: |
926 | /* Shouldn't happen */ | |
927 | return WORK_ERROR; | |
928 | ||
05c4f1d5 MC |
929 | case TLS_ST_CR_CERT_REQ: |
930 | return tls_prepare_client_certificate(s, wst); | |
931 | ||
61ae935a MC |
932 | #ifndef OPENSSL_NO_SCTP |
933 | case TLS_ST_CR_SRVR_DONE: | |
934 | /* We only get here if we are using SCTP and we are renegotiating */ | |
935 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
936 | s->s3->in_read_app_data = 2; | |
937 | s->rwstate = SSL_READING; | |
938 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
939 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 940 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
941 | return WORK_MORE_A; |
942 | } | |
fe3a3291 | 943 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
944 | return WORK_FINISHED_STOP; |
945 | #endif | |
61ae935a | 946 | } |
61ae935a MC |
947 | } |
948 | ||
7cea05dc | 949 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 950 | { |
2c7b4dbc | 951 | unsigned char *p; |
ec60ccc1 MC |
952 | size_t sess_id_len; |
953 | int i, protverr; | |
2c7b4dbc | 954 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 955 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
956 | SSL_COMP *comp; |
957 | #endif | |
b9908bf9 | 958 | SSL_SESSION *sess = s->session; |
0f113f3e | 959 | |
7cea05dc | 960 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
961 | /* Should not happen */ |
962 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 963 | return 0; |
2c7b4dbc | 964 | } |
0f113f3e | 965 | |
b9908bf9 | 966 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
967 | protverr = ssl_set_client_hello_version(s); |
968 | if (protverr != 0) { | |
969 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 970 | return 0; |
4fa52141 | 971 | } |
0f113f3e | 972 | |
a230b26e | 973 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 974 | /* |
b9908bf9 MC |
975 | * In the case of EAP-FAST, we can have a pre-shared |
976 | * "ticket" without a session ID. | |
0f113f3e | 977 | */ |
aff8c126 | 978 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
979 | (sess->not_resumable)) { |
980 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 981 | return 0; |
b9908bf9 MC |
982 | } |
983 | /* else use the pre-loaded session */ | |
0f113f3e | 984 | |
c7f47786 MC |
985 | /* This is a real handshake so make sure we clean it up at the end */ |
986 | s->statem.cleanuphand = 1; | |
987 | ||
b9908bf9 | 988 | p = s->s3->client_random; |
0f113f3e | 989 | |
b9908bf9 MC |
990 | /* |
991 | * for DTLS if client_random is initialized, reuse it, we are | |
992 | * required to use same upon reply to HelloVerify | |
993 | */ | |
994 | if (SSL_IS_DTLS(s)) { | |
995 | size_t idx; | |
996 | i = 1; | |
997 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
998 | if (p[idx]) { | |
999 | i = 0; | |
1000 | break; | |
0f113f3e | 1001 | } |
0f113f3e | 1002 | } |
b9908bf9 MC |
1003 | } else |
1004 | i = 1; | |
0f113f3e | 1005 | |
a230b26e | 1006 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1007 | return 0; |
b9908bf9 | 1008 | |
b9908bf9 MC |
1009 | /*- |
1010 | * version indicates the negotiated version: for example from | |
1011 | * an SSLv2/v3 compatible client hello). The client_version | |
1012 | * field is the maximum version we permit and it is also | |
1013 | * used in RSA encrypted premaster secrets. Some servers can | |
1014 | * choke if we initially report a higher version then | |
1015 | * renegotiate to a lower one in the premaster secret. This | |
1016 | * didn't happen with TLS 1.0 as most servers supported it | |
1017 | * but it can with TLS 1.1 or later if the server only supports | |
1018 | * 1.0. | |
1019 | * | |
1020 | * Possible scenario with previous logic: | |
1021 | * 1. Client hello indicates TLS 1.2 | |
1022 | * 2. Server hello says TLS 1.0 | |
1023 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1024 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1025 | * 5. Server sends hello request to renegotiate. |
1026 | * 6. Client hello indicates TLS v1.0 as we now | |
1027 | * know that is maximum server supports. | |
1028 | * 7. Server chokes on RSA encrypted premaster secret | |
1029 | * containing version 1.0. | |
1030 | * | |
1031 | * For interoperability it should be OK to always use the | |
1032 | * maximum version we support in client hello and then rely | |
1033 | * on the checking of version to ensure the servers isn't | |
1034 | * being inconsistent: for example initially negotiating with | |
1035 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1036 | * client_version in client hello and not resetting it to | |
1037 | * the negotiated version. | |
cd998837 MC |
1038 | * |
1039 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1040 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1041 | */ |
7acb8b64 | 1042 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1043 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1044 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1045 | return 0; |
2c7b4dbc | 1046 | } |
b9908bf9 MC |
1047 | |
1048 | /* Session ID */ | |
f05bcf0f | 1049 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1050 | sess_id_len = 0; |
b9908bf9 | 1051 | else |
ec60ccc1 MC |
1052 | sess_id_len = s->session->session_id_length; |
1053 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1054 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1055 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1056 | sess_id_len)) | |
7cea05dc | 1057 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1058 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1059 | return 0; |
b9908bf9 | 1060 | } |
0f113f3e | 1061 | |
b9908bf9 MC |
1062 | /* cookie stuff for DTLS */ |
1063 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1064 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1065 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1066 | s->d1->cookie_len)) { |
b9908bf9 | 1067 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1068 | return 0; |
0f113f3e | 1069 | } |
b9908bf9 MC |
1070 | } |
1071 | ||
1072 | /* Ciphers supported */ | |
7cea05dc | 1073 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1074 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1075 | return 0; |
2c7b4dbc MC |
1076 | } |
1077 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1078 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1079 | return 0; | |
1080 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1081 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1082 | return 0; |
b9908bf9 | 1083 | } |
0f113f3e | 1084 | |
b9908bf9 | 1085 | /* COMPRESSION */ |
7cea05dc | 1086 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1087 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1088 | return 0; |
2c7b4dbc MC |
1089 | } |
1090 | #ifndef OPENSSL_NO_COMP | |
1091 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1092 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1093 | for (i = 0; i < compnum; i++) { | |
1094 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1095 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1096 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1097 | return 0; |
2c7b4dbc MC |
1098 | } |
1099 | } | |
b9908bf9 | 1100 | } |
09b6c2ef | 1101 | #endif |
2c7b4dbc | 1102 | /* Add the NULL method */ |
7cea05dc | 1103 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1104 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1105 | return 0; |
2c7b4dbc | 1106 | } |
761772d7 | 1107 | |
b9908bf9 | 1108 | /* TLS extensions */ |
30aeba43 | 1109 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1110 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1111 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1112 | return 0; |
b9908bf9 | 1113 | } |
0f113f3e | 1114 | |
b9908bf9 | 1115 | return 1; |
0f113f3e | 1116 | } |
d02b48c6 | 1117 | |
be3583fa | 1118 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1119 | { |
1120 | int al; | |
cb150cbc | 1121 | size_t cookie_len; |
8ba708e5 MC |
1122 | PACKET cookiepkt; |
1123 | ||
1124 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1125 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1126 | al = SSL_AD_DECODE_ERROR; |
1127 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1128 | goto f_err; | |
1129 | } | |
1130 | ||
1131 | cookie_len = PACKET_remaining(&cookiepkt); | |
1132 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1133 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1134 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1135 | goto f_err; | |
1136 | } | |
1137 | ||
1138 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1139 | al = SSL_AD_DECODE_ERROR; | |
1140 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1141 | goto f_err; | |
1142 | } | |
1143 | s->d1->cookie_len = cookie_len; | |
1144 | ||
1145 | return MSG_PROCESS_FINISHED_READING; | |
1146 | f_err: | |
1147 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1148 | ossl_statem_set_error(s); |
8ba708e5 MC |
1149 | return MSG_PROCESS_ERROR; |
1150 | } | |
1151 | ||
be3583fa | 1152 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1153 | { |
1154 | STACK_OF(SSL_CIPHER) *sk; | |
1155 | const SSL_CIPHER *c; | |
332eb390 | 1156 | PACKET session_id, extpkt; |
b9908bf9 | 1157 | size_t session_id_len; |
b6981744 | 1158 | const unsigned char *cipherchars; |
b9908bf9 MC |
1159 | int i, al = SSL_AD_INTERNAL_ERROR; |
1160 | unsigned int compression; | |
4fa52141 | 1161 | unsigned int sversion; |
3434f40b | 1162 | unsigned int context; |
4fa52141 | 1163 | int protverr; |
332eb390 | 1164 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1165 | #ifndef OPENSSL_NO_COMP |
1166 | SSL_COMP *comp; | |
1167 | #endif | |
1168 | ||
4fa52141 VD |
1169 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1170 | al = SSL_AD_DECODE_ERROR; | |
1171 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1172 | goto f_err; | |
1173 | } | |
50932c4a | 1174 | |
4ff65f77 | 1175 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1176 | protverr = ssl_choose_client_version(s, sversion); |
1177 | if (protverr != 0) { | |
1178 | al = SSL_AD_PROTOCOL_VERSION; | |
1179 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1180 | goto f_err; | |
0f113f3e | 1181 | } |
0f113f3e MC |
1182 | |
1183 | /* load the server hello data */ | |
1184 | /* load the server random */ | |
73999b62 | 1185 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1186 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1187 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1188 | goto f_err; |
1189 | } | |
0f113f3e | 1190 | |
fc5ce51d | 1191 | /* Get the session-id. */ |
71728dd8 MC |
1192 | if (!SSL_IS_TLS13(s)) { |
1193 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1194 | al = SSL_AD_DECODE_ERROR; | |
1195 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1196 | goto f_err; | |
1197 | } | |
1198 | session_id_len = PACKET_remaining(&session_id); | |
1199 | if (session_id_len > sizeof s->session->session_id | |
1200 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1201 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1202 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1203 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1204 | goto f_err; | |
1205 | } | |
1206 | } else { | |
625b0d51 | 1207 | PACKET_null_init(&session_id); |
71728dd8 | 1208 | session_id_len = 0; |
0f113f3e | 1209 | } |
e481f9b9 | 1210 | |
73999b62 | 1211 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1212 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1213 | al = SSL_AD_DECODE_ERROR; |
1214 | goto f_err; | |
1215 | } | |
1216 | ||
4ff65f77 MC |
1217 | if (!SSL_IS_TLS13(s)) { |
1218 | if (!PACKET_get_1(pkt, &compression)) { | |
1219 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1220 | al = SSL_AD_DECODE_ERROR; | |
1221 | goto f_err; | |
1222 | } | |
1223 | } else { | |
1224 | compression = 0; | |
1225 | } | |
1226 | ||
1227 | /* TLS extensions */ | |
1228 | if (PACKET_remaining(pkt) == 0) { | |
1229 | PACKET_null_init(&extpkt); | |
1230 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1231 | al = SSL_AD_DECODE_ERROR; | |
1232 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1233 | goto f_err; | |
1234 | } | |
1235 | ||
1236 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1237 | : EXT_TLS1_2_SERVER_HELLO; | |
1238 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al)) | |
1239 | goto f_err; | |
1240 | ||
1241 | s->hit = 0; | |
1242 | ||
1243 | if (SSL_IS_TLS13(s)) { | |
1244 | /* This will set s->hit if we are resuming */ | |
1245 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1246 | EXT_TLS1_3_SERVER_HELLO, | |
1247 | extensions, NULL, 0, &al)) | |
1248 | goto f_err; | |
1249 | } else { | |
8c1a5343 | 1250 | /* |
4ff65f77 MC |
1251 | * Check if we can resume the session based on external pre-shared |
1252 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1253 | * Resumption based on server-side state works with session IDs. | |
1254 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1255 | * works by overriding the SessionTicket extension at the application | |
1256 | * layer, and does not send a session ID. (We do not know whether | |
1257 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1258 | * ID alone is not a reliable indicator of session resumption, so we | |
1259 | * first check if we can resume, and later peek at the next handshake | |
1260 | * message to see if the server wants to resume. | |
8c1a5343 | 1261 | */ |
4ff65f77 MC |
1262 | if (s->version >= TLS1_VERSION |
1263 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1264 | const SSL_CIPHER *pref_cipher = NULL; | |
1265 | /* | |
1266 | * s->session->master_key_length is a size_t, but this is an int for | |
1267 | * backwards compat reasons | |
1268 | */ | |
1269 | int master_key_length; | |
1270 | master_key_length = sizeof(s->session->master_key); | |
1271 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1272 | &master_key_length, | |
1273 | NULL, &pref_cipher, | |
1274 | s->ext.session_secret_cb_arg) | |
1275 | && master_key_length > 0) { | |
1276 | s->session->master_key_length = master_key_length; | |
1277 | s->session->cipher = pref_cipher ? | |
1278 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); | |
1279 | } else { | |
1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1281 | al = SSL_AD_INTERNAL_ERROR; | |
1282 | goto f_err; | |
1283 | } | |
0f113f3e | 1284 | } |
4ff65f77 MC |
1285 | |
1286 | if (session_id_len != 0 | |
1287 | && session_id_len == s->session->session_id_length | |
1288 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1289 | session_id_len) == 0) | |
1290 | s->hit = 1; | |
50932c4a MC |
1291 | } |
1292 | ||
4ff65f77 | 1293 | if (s->hit) { |
0f113f3e | 1294 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1295 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1296 | /* actually a client application bug */ |
1297 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1298 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1299 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1300 | goto f_err; | |
1301 | } | |
6e3d0153 | 1302 | } else { |
0f113f3e | 1303 | /* |
6e3d0153 | 1304 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1305 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1306 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1307 | * so the PAC-based session secret is always preserved. It'll be | |
1308 | * overwritten if the server refuses resumption. | |
0f113f3e | 1309 | */ |
4ff65f77 MC |
1310 | if (s->session->session_id_length > 0 |
1311 | || (SSL_IS_TLS13(s) | |
1312 | && s->session->ext.tick_identity | |
1313 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1314 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1315 | if (!ssl_get_new_session(s, 0)) { |
1316 | goto f_err; | |
1317 | } | |
1318 | } | |
50932c4a | 1319 | |
ccae4a15 | 1320 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1321 | s->session->session_id_length = session_id_len; |
1322 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1323 | if (session_id_len > 0) |
1324 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1325 | session_id_len); | |
0f113f3e | 1326 | } |
fc5ce51d | 1327 | |
ccae4a15 FI |
1328 | /* Session version and negotiated protocol version should match */ |
1329 | if (s->version != s->session->ssl_version) { | |
1330 | al = SSL_AD_PROTOCOL_VERSION; | |
1331 | ||
1332 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1333 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1334 | goto f_err; | |
1335 | } | |
1336 | ||
50932c4a | 1337 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1338 | if (c == NULL) { |
1339 | /* unknown cipher */ | |
1340 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1341 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1342 | goto f_err; |
1343 | } | |
0f113f3e | 1344 | /* |
3eb2aff4 KR |
1345 | * Now that we know the version, update the check to see if it's an allowed |
1346 | * version. | |
1347 | */ | |
1348 | s->s3->tmp.min_ver = s->version; | |
1349 | s->s3->tmp.max_ver = s->version; | |
1350 | /* | |
1351 | * If it is a disabled cipher we either didn't send it in client hello, | |
1352 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1353 | */ |
1354 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1355 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1356 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1357 | goto f_err; |
1358 | } | |
0f113f3e MC |
1359 | |
1360 | sk = ssl_get_ciphers_by_id(s); | |
1361 | i = sk_SSL_CIPHER_find(sk, c); | |
1362 | if (i < 0) { | |
1363 | /* we did not say we would use this cipher */ | |
1364 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1365 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1366 | goto f_err; |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * Depending on the session caching (internal/external), the cipher | |
1371 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1372 | * set and use it for comparison. | |
1373 | */ | |
1374 | if (s->session->cipher) | |
1375 | s->session->cipher_id = s->session->cipher->id; | |
1376 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1377 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1378 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1379 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1380 | goto f_err; | |
0f113f3e MC |
1381 | } |
1382 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1383 | |
09b6c2ef | 1384 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1385 | if (compression != 0) { |
0f113f3e | 1386 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1387 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1388 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1389 | goto f_err; | |
1390 | } | |
1391 | /* | |
1392 | * If compression is disabled we'd better not try to resume a session | |
1393 | * using compression. | |
1394 | */ | |
1395 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1396 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1397 | goto f_err; |
1398 | } | |
09b6c2ef | 1399 | #else |
fc5ce51d | 1400 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1401 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1402 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1403 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1404 | goto f_err; | |
1405 | } | |
fc5ce51d | 1406 | if (compression == 0) |
0f113f3e MC |
1407 | comp = NULL; |
1408 | else if (!ssl_allow_compression(s)) { | |
1409 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1410 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1411 | goto f_err; |
fc5ce51d EK |
1412 | } else { |
1413 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1414 | } | |
0f113f3e | 1415 | |
fc5ce51d | 1416 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1417 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1418 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1419 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1420 | goto f_err; | |
1421 | } else { | |
1422 | s->s3->tmp.new_compression = comp; | |
1423 | } | |
09b6c2ef | 1424 | #endif |
761772d7 | 1425 | |
4ff65f77 | 1426 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1427 | goto f_err; |
1428 | ||
8723588e MC |
1429 | #ifndef OPENSSL_NO_SCTP |
1430 | if (SSL_IS_DTLS(s) && s->hit) { | |
1431 | unsigned char sctpauthkey[64]; | |
1432 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1433 | ||
1434 | /* | |
1435 | * Add new shared key for SCTP-Auth, will be ignored if | |
1436 | * no SCTP used. | |
1437 | */ | |
141eb8c6 MC |
1438 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1439 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1440 | |
1441 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1442 | sizeof(sctpauthkey), |
1443 | labelbuffer, | |
1444 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1445 | goto f_err; |
8723588e MC |
1446 | |
1447 | BIO_ctrl(SSL_get_wbio(s), | |
1448 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1449 | sizeof(sctpauthkey), sctpauthkey); | |
1450 | } | |
1451 | #endif | |
1452 | ||
92760c21 MC |
1453 | /* |
1454 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1455 | * we're done with this message | |
1456 | */ | |
1457 | if (SSL_IS_TLS13(s) | |
1458 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1459 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1460 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1461 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1462 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1463 | al = SSL_AD_INTERNAL_ERROR; | |
1464 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1465 | goto f_err; | |
1466 | } | |
1467 | ||
1b0286a3 | 1468 | OPENSSL_free(extensions); |
b9908bf9 | 1469 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1470 | f_err: |
1471 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1472 | ossl_statem_set_error(s); |
1b0286a3 | 1473 | OPENSSL_free(extensions); |
b9908bf9 | 1474 | return MSG_PROCESS_ERROR; |
0f113f3e | 1475 | } |
d02b48c6 | 1476 | |
3847d426 MC |
1477 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1478 | { | |
1479 | unsigned int sversion; | |
2248dbeb | 1480 | int errorcode; |
3847d426 MC |
1481 | RAW_EXTENSION *extensions = NULL; |
1482 | int al; | |
1483 | PACKET extpkt; | |
1484 | ||
1485 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1486 | al = SSL_AD_DECODE_ERROR; | |
1487 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1488 | goto f_err; | |
1489 | } | |
1490 | ||
1491 | s->hello_retry_request = 1; | |
1492 | ||
1493 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1494 | errorcode = ssl_choose_client_version(s, sversion); |
1495 | if (errorcode != 0) { | |
3847d426 | 1496 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1497 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1498 | goto f_err; |
1499 | } | |
1500 | ||
1501 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1502 | al = SSL_AD_DECODE_ERROR; | |
1503 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1504 | goto f_err; | |
1505 | } | |
1506 | ||
1507 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
1508 | &extensions, &al) | |
1509 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
1510 | extensions, NULL, 0, &al)) | |
1511 | goto f_err; | |
1512 | ||
1513 | OPENSSL_free(extensions); | |
1514 | ||
1515 | return MSG_PROCESS_FINISHED_READING; | |
1516 | f_err: | |
1517 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1518 | ossl_statem_set_error(s); | |
1519 | OPENSSL_free(extensions); | |
1520 | return MSG_PROCESS_ERROR; | |
1521 | } | |
1522 | ||
be3583fa | 1523 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1524 | { |
1525 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1526 | unsigned long cert_list_len, cert_len; | |
1527 | X509 *x = NULL; | |
b6981744 | 1528 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1529 | STACK_OF(X509) *sk = NULL; |
1530 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1531 | size_t chainidx; |
e96e0f8e | 1532 | unsigned int context = 0; |
0f113f3e MC |
1533 | |
1534 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1535 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1536 | goto err; |
0f113f3e MC |
1537 | } |
1538 | ||
e96e0f8e MC |
1539 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1540 | || context != 0 | |
1541 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1542 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1543 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1544 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1545 | goto f_err; |
1546 | } | |
d805a57b | 1547 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1548 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1549 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1550 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1551 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1552 | SSL_R_CERT_LENGTH_MISMATCH); |
1553 | goto f_err; | |
1554 | } | |
1555 | ||
df758a85 MC |
1556 | certstart = certbytes; |
1557 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1558 | if (x == NULL) { |
1559 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1560 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1561 | goto f_err; |
1562 | } | |
df758a85 | 1563 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1564 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1565 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1566 | SSL_R_CERT_LENGTH_MISMATCH); |
1567 | goto f_err; | |
1568 | } | |
e96e0f8e MC |
1569 | |
1570 | if (SSL_IS_TLS13(s)) { | |
1571 | RAW_EXTENSION *rawexts = NULL; | |
1572 | PACKET extensions; | |
1573 | ||
1574 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1575 | al = SSL_AD_DECODE_ERROR; | |
1576 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1577 | goto f_err; | |
1578 | } | |
1579 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
1580 | &rawexts, &al) | |
1581 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, | |
5ee289ea MC |
1582 | rawexts, x, chainidx, &al)) { |
1583 | OPENSSL_free(rawexts); | |
e96e0f8e | 1584 | goto f_err; |
5ee289ea MC |
1585 | } |
1586 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1587 | } |
1588 | ||
0f113f3e | 1589 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1590 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1591 | goto err; |
0f113f3e MC |
1592 | } |
1593 | x = NULL; | |
0f113f3e MC |
1594 | } |
1595 | ||
1596 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1597 | /* |
1598 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1599 | * for client side verification of the server certificate to take place. | |
1600 | * However, historically the code has only checked that *any* flag is set | |
1601 | * to cause server verification to take place. Use of the other flags makes | |
1602 | * no sense in client mode. An attempt to clean up the semantics was | |
1603 | * reverted because at least one application *only* set | |
1604 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1605 | * server verification to take place, after the clean up it silently did | |
1606 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1607 | * sent to them because they are void functions. Therefore, we now use the | |
1608 | * (less clean) historic behaviour of performing validation if any flag is | |
1609 | * set. The *documented* interface remains the same. | |
1610 | */ | |
1611 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1612 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1613 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1614 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1615 | goto f_err; | |
1616 | } | |
1617 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1618 | if (i > 1) { | |
b9908bf9 | 1619 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1620 | al = SSL_AD_HANDSHAKE_FAILURE; |
1621 | goto f_err; | |
1622 | } | |
1623 | ||
c34b0f99 | 1624 | s->session->peer_chain = sk; |
0f113f3e MC |
1625 | /* |
1626 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1627 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1628 | */ |
1629 | x = sk_X509_value(sk, 0); | |
1630 | sk = NULL; | |
1631 | /* | |
1632 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1633 | */ | |
1634 | ||
8382fd3a | 1635 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1636 | |
55a9a16f | 1637 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1638 | x = NULL; |
1639 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1640 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1641 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1642 | goto f_err; | |
1643 | } | |
1644 | ||
1645 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1646 | if (i < 0) { |
0f113f3e MC |
1647 | x = NULL; |
1648 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1649 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1650 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1651 | goto f_err; | |
1652 | } | |
05b8486e DSH |
1653 | /* |
1654 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1655 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1656 | * type. | |
1657 | */ | |
1658 | if (!SSL_IS_TLS13(s)) { | |
1659 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1660 | if (exp_idx >= 0 && i != exp_idx | |
1661 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1662 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1663 | && i != SSL_PKEY_GOST01))) { | |
1664 | x = NULL; | |
1665 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1666 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1667 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1668 | goto f_err; | |
1669 | } | |
0f113f3e | 1670 | } |
a273c6ee | 1671 | s->session->peer_type = i; |
55a9a16f MC |
1672 | |
1673 | X509_free(s->session->peer); | |
05f0fb9f | 1674 | X509_up_ref(x); |
55a9a16f | 1675 | s->session->peer = x; |
0f113f3e | 1676 | s->session->verify_result = s->verify_result; |
0f113f3e | 1677 | x = NULL; |
2c5dfdc3 MC |
1678 | |
1679 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1680 | if (SSL_IS_TLS13(s) | |
1681 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1682 | sizeof(s->cert_verify_hash), | |
1683 | &s->cert_verify_hash_len)) { | |
1684 | al = SSL_AD_INTERNAL_ERROR; | |
1685 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1686 | goto f_err; | |
1687 | } | |
1688 | ||
b9908bf9 | 1689 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1690 | goto done; |
1691 | ||
0f113f3e | 1692 | f_err: |
66696478 | 1693 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1694 | err: |
fe3a3291 | 1695 | ossl_statem_set_error(s); |
66696478 | 1696 | done: |
0f113f3e MC |
1697 | X509_free(x); |
1698 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1699 | return ret; |
0f113f3e | 1700 | } |
d02b48c6 | 1701 | |
7dc1c647 | 1702 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1703 | { |
1704 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1705 | PACKET psk_identity_hint; |
02a74590 | 1706 | |
7dc1c647 MC |
1707 | /* PSK ciphersuites are preceded by an identity hint */ |
1708 | ||
1709 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1710 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1711 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1712 | return 0; |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Store PSK identity hint for later use, hint is used in | |
1717 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1718 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1719 | * identity. | |
1720 | */ | |
1721 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1722 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1723 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1724 | return 0; |
1725 | } | |
02a74590 | 1726 | |
7dc1c647 MC |
1727 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1728 | OPENSSL_free(s->session->psk_identity_hint); | |
1729 | s->session->psk_identity_hint = NULL; | |
1730 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1731 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1732 | *al = SSL_AD_INTERNAL_ERROR; |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | return 1; | |
1737 | #else | |
4fa88861 | 1738 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1739 | *al = SSL_AD_INTERNAL_ERROR; |
1740 | return 0; | |
02a74590 MC |
1741 | #endif |
1742 | } | |
1743 | ||
25c6c10c MC |
1744 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1745 | { | |
1746 | #ifndef OPENSSL_NO_SRP | |
1747 | PACKET prime, generator, salt, server_pub; | |
1748 | ||
1749 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1750 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1751 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1752 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1753 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1754 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1755 | return 0; |
1756 | } | |
1757 | ||
348240c6 | 1758 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1759 | if ((s->srp_ctx.N = |
1760 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1761 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1762 | || (s->srp_ctx.g = |
1763 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1764 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1765 | || (s->srp_ctx.s = |
1766 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1767 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1768 | || (s->srp_ctx.B = |
1769 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1770 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1771 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1772 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1773 | return 0; |
1774 | } | |
1775 | ||
1776 | if (!srp_verify_server_param(s, al)) { | |
1777 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1778 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1779 | return 0; |
1780 | } | |
1781 | ||
1782 | /* We must check if there is a certificate */ | |
a230b26e | 1783 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1784 | *pkey = X509_get0_pubkey(s->session->peer); |
1785 | ||
1786 | return 1; | |
1787 | #else | |
4fa88861 | 1788 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1789 | *al = SSL_AD_INTERNAL_ERROR; |
1790 | return 0; | |
1791 | #endif | |
1792 | } | |
1793 | ||
e01a610d MC |
1794 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1795 | { | |
1796 | #ifndef OPENSSL_NO_DH | |
1797 | PACKET prime, generator, pub_key; | |
1798 | EVP_PKEY *peer_tmp = NULL; | |
1799 | ||
1800 | DH *dh = NULL; | |
1801 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1802 | ||
26505153 RL |
1803 | int check_bits = 0; |
1804 | ||
e01a610d MC |
1805 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1806 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1807 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1808 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1809 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1810 | return 0; |
1811 | } | |
1812 | ||
1813 | peer_tmp = EVP_PKEY_new(); | |
1814 | dh = DH_new(); | |
1815 | ||
1816 | if (peer_tmp == NULL || dh == NULL) { | |
1817 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1818 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1819 | goto err; |
1820 | } | |
1821 | ||
348240c6 MC |
1822 | /* TODO(size_t): Convert these calls */ |
1823 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1824 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1825 | NULL); | |
1826 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1827 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1828 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1829 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1830 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1831 | goto err; |
1832 | } | |
1833 | ||
26505153 RL |
1834 | /* test non-zero pupkey */ |
1835 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1836 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1837 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1838 | goto err; |
1839 | } | |
1840 | ||
1841 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1842 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1843 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1844 | goto err; |
1845 | } | |
1846 | p = g = NULL; | |
1847 | ||
26505153 RL |
1848 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1849 | *al = SSL_AD_DECODE_ERROR; | |
1850 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1851 | goto err; | |
1852 | } | |
1853 | ||
e01a610d MC |
1854 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1855 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1856 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1857 | goto err; |
1858 | } | |
1859 | bnpub_key = NULL; | |
1860 | ||
1861 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1862 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1863 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1864 | goto err; |
1865 | } | |
1866 | ||
1867 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1868 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1869 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1870 | goto err; |
1871 | } | |
1872 | ||
1873 | s->s3->peer_tmp = peer_tmp; | |
1874 | ||
1875 | /* | |
1876 | * FIXME: This makes assumptions about which ciphersuites come with | |
1877 | * public keys. We should have a less ad-hoc way of doing this | |
1878 | */ | |
a230b26e | 1879 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1880 | *pkey = X509_get0_pubkey(s->session->peer); |
1881 | /* else anonymous DH, so no certificate or pkey. */ | |
1882 | ||
1883 | return 1; | |
1884 | ||
1885 | err: | |
1886 | BN_free(p); | |
1887 | BN_free(g); | |
1888 | BN_free(bnpub_key); | |
1889 | DH_free(dh); | |
1890 | EVP_PKEY_free(peer_tmp); | |
1891 | ||
1892 | return 0; | |
1893 | #else | |
4fa88861 | 1894 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1895 | *al = SSL_AD_INTERNAL_ERROR; |
1896 | return 0; | |
1897 | #endif | |
1898 | } | |
1899 | ||
ff74aeb1 MC |
1900 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1901 | { | |
1902 | #ifndef OPENSSL_NO_EC | |
1903 | PACKET encoded_pt; | |
1904 | const unsigned char *ecparams; | |
1905 | int curve_nid; | |
ec24630a | 1906 | unsigned int curve_flags; |
ff74aeb1 MC |
1907 | EVP_PKEY_CTX *pctx = NULL; |
1908 | ||
1909 | /* | |
1910 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1911 | * public key. For now we only support named (not generic) curves and | |
1912 | * ECParameters in this case is just three bytes. | |
1913 | */ | |
1914 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1915 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1916 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1917 | return 0; |
1918 | } | |
1919 | /* | |
1920 | * Check curve is one of our preferences, if not server has sent an | |
1921 | * invalid curve. ECParameters is 3 bytes. | |
1922 | */ | |
1923 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1924 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1925 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1926 | return 0; |
1927 | } | |
1928 | ||
ec24630a DSH |
1929 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1930 | ||
a230b26e | 1931 | if (curve_nid == 0) { |
ff74aeb1 | 1932 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1933 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1934 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1935 | return 0; | |
1936 | } | |
1937 | ||
ec24630a DSH |
1938 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1939 | EVP_PKEY *key = EVP_PKEY_new(); | |
1940 | ||
1941 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1942 | *al = SSL_AD_INTERNAL_ERROR; | |
1943 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1944 | EVP_PKEY_free(key); | |
1945 | return 0; | |
1946 | } | |
1947 | s->s3->peer_tmp = key; | |
1948 | } else { | |
1949 | /* Set up EVP_PKEY with named curve as parameters */ | |
1950 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1951 | if (pctx == NULL | |
1952 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1953 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1954 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1955 | *al = SSL_AD_INTERNAL_ERROR; | |
1956 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1957 | EVP_PKEY_CTX_free(pctx); | |
1958 | return 0; | |
1959 | } | |
ff74aeb1 | 1960 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1961 | pctx = NULL; |
ff74aeb1 | 1962 | } |
ff74aeb1 MC |
1963 | |
1964 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1965 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1966 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1967 | return 0; |
1968 | } | |
1969 | ||
ec24630a DSH |
1970 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1971 | PACKET_data(&encoded_pt), | |
1972 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1973 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1974 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1975 | return 0; |
1976 | } | |
1977 | ||
1978 | /* | |
1979 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1980 | * ECParameters in the server key exchange message. We do support RSA | |
1981 | * and ECDSA. | |
1982 | */ | |
1983 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1984 | *pkey = X509_get0_pubkey(s->session->peer); | |
1985 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1986 | *pkey = X509_get0_pubkey(s->session->peer); | |
1987 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1988 | ||
1989 | return 1; | |
1990 | #else | |
4fa88861 | 1991 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1992 | *al = SSL_AD_INTERNAL_ERROR; |
1993 | return 0; | |
1994 | #endif | |
1995 | } | |
1996 | ||
be3583fa | 1997 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1998 | { |
5554facb | 1999 | int al = -1; |
e1e588ac | 2000 | long alg_k; |
b9908bf9 | 2001 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2002 | EVP_MD_CTX *md_ctx = NULL; |
2003 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2004 | PACKET save_param_start, signature; |
b9908bf9 | 2005 | |
b9908bf9 MC |
2006 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2007 | ||
73999b62 | 2008 | save_param_start = *pkt; |
8d92c1f8 | 2009 | |
3260adf1 | 2010 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2011 | EVP_PKEY_free(s->s3->peer_tmp); |
2012 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2013 | #endif |
d02b48c6 | 2014 | |
7689082b | 2015 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2016 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2017 | goto err; | |
7689082b DSH |
2018 | } |
2019 | ||
2020 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2021 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2022 | } else if (alg_k & SSL_kSRP) { |
2023 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2024 | goto err; |
e01a610d MC |
2025 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2026 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2027 | goto err; | |
ff74aeb1 MC |
2028 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2029 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2030 | goto err; | |
0f113f3e MC |
2031 | } else if (alg_k) { |
2032 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2033 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2034 | goto err; |
0f113f3e | 2035 | } |
0f113f3e | 2036 | |
0f113f3e MC |
2037 | /* if it was signed, check the signature */ |
2038 | if (pkey != NULL) { | |
32942870 | 2039 | PACKET params; |
be8dba2c MC |
2040 | int maxsig; |
2041 | const EVP_MD *md = NULL; | |
e1e588ac | 2042 | |
32942870 EK |
2043 | /* |
2044 | * |pkt| now points to the beginning of the signature, so the difference | |
2045 | * equals the length of the parameters. | |
2046 | */ | |
2047 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2048 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2049 | PACKET_remaining(pkt))) { |
32942870 | 2050 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2051 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2052 | goto err; |
32942870 EK |
2053 | } |
2054 | ||
0f113f3e | 2055 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2056 | unsigned int sigalg; |
0f113f3e | 2057 | int rv; |
703bcee0 MC |
2058 | |
2059 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2060 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2061 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2062 | goto err; |
0f113f3e | 2063 | } |
5554facb | 2064 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2065 | if (rv == -1) { |
2066 | al = SSL_AD_INTERNAL_ERROR; | |
2067 | goto err; | |
2068 | } else if (rv == 0) { | |
2069 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2070 | goto err; |
0f113f3e | 2071 | } |
a2f9200f | 2072 | #ifdef SSL_DEBUG |
0f113f3e MC |
2073 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2074 | #endif | |
f365a3e2 DSH |
2075 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2076 | al = SSL_AD_INTERNAL_ERROR; | |
2077 | goto err; | |
32942870 | 2078 | } |
0f113f3e | 2079 | |
f365a3e2 DSH |
2080 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2081 | ||
73999b62 MC |
2082 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2083 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2084 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2085 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2086 | goto err; |
0f113f3e | 2087 | } |
be8dba2c MC |
2088 | maxsig = EVP_PKEY_size(pkey); |
2089 | if (maxsig < 0) { | |
e1e588ac | 2090 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2091 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2092 | goto err; |
8098fc56 | 2093 | } |
0f113f3e MC |
2094 | |
2095 | /* | |
8098fc56 | 2096 | * Check signature length |
0f113f3e | 2097 | */ |
be8dba2c | 2098 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2099 | /* wrong packet length */ |
e1e588ac | 2100 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2101 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2102 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2103 | goto err; |
2104 | } | |
2105 | ||
2106 | md_ctx = EVP_MD_CTX_new(); | |
2107 | if (md_ctx == NULL) { | |
2108 | al = SSL_AD_INTERNAL_ERROR; | |
2109 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2110 | goto err; | |
0f113f3e | 2111 | } |
e1e588ac | 2112 | |
fe3066ee MC |
2113 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2114 | al = SSL_AD_INTERNAL_ERROR; | |
2115 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2116 | goto err; | |
2117 | } | |
5554facb | 2118 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2119 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2120 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2121 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2122 | al = SSL_AD_INTERNAL_ERROR; |
2123 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2124 | goto err; | |
2125 | } | |
2126 | } | |
2127 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2128 | SSL3_RANDOM_SIZE) <= 0 | |
2129 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2130 | SSL3_RANDOM_SIZE) <= 0 | |
2131 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2132 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2133 | al = SSL_AD_INTERNAL_ERROR; |
2134 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2135 | goto err; |
192e4bbb | 2136 | } |
fe3066ee MC |
2137 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2138 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2139 | /* bad signature */ |
2140 | al = SSL_AD_DECRYPT_ERROR; | |
2141 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2142 | goto err; |
0f113f3e | 2143 | } |
e1e588ac | 2144 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2145 | md_ctx = NULL; |
0f113f3e | 2146 | } else { |
7689082b | 2147 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2148 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2149 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2150 | /* Might be wrong key type, check it */ |
e1e588ac | 2151 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2152 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2153 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2154 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2155 | } else { |
2156 | al = SSL_AD_DECODE_ERROR; | |
2157 | } | |
0f113f3e MC |
2158 | goto err; |
2159 | } | |
2160 | /* still data left over */ | |
73999b62 | 2161 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2162 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2163 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2164 | goto err; |
0f113f3e MC |
2165 | } |
2166 | } | |
e1e588ac | 2167 | |
b9908bf9 | 2168 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2169 | err: |
7dc1c647 MC |
2170 | if (al != -1) |
2171 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2172 | ossl_statem_set_error(s); |
fe3066ee | 2173 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2174 | return MSG_PROCESS_ERROR; |
0f113f3e | 2175 | } |
d02b48c6 | 2176 | |
be3583fa | 2177 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2178 | { |
2179 | int ret = MSG_PROCESS_ERROR; | |
2180 | unsigned int list_len, ctype_num, i, name_len; | |
2181 | X509_NAME *xn = NULL; | |
b6981744 EK |
2182 | const unsigned char *data; |
2183 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 2184 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
2185 | |
2186 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2187 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2188 | goto err; |
2189 | } | |
2190 | ||
2191 | /* get the certificate types */ | |
73999b62 | 2192 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 2193 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 2194 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2195 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
2196 | goto err; |
2197 | } | |
b548a1f1 RS |
2198 | OPENSSL_free(s->cert->ctypes); |
2199 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2200 | if (ctype_num > SSL3_CT_NUMBER) { |
2201 | /* If we exceed static buffer copy all to cert structure */ | |
2202 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2203 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 2204 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2205 | goto err; |
2206 | } | |
ac112332 | 2207 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 2208 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
2209 | ctype_num = SSL3_CT_NUMBER; |
2210 | } | |
2211 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2212 | s->s3->tmp.ctype[i] = data[i]; |
2213 | ||
0f113f3e | 2214 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2215 | PACKET sigalgs; |
2216 | ||
2217 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2218 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2219 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2220 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2221 | goto err; |
2222 | } | |
ac112332 | 2223 | |
0f113f3e MC |
2224 | /* Clear certificate digests and validity flags */ |
2225 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2226 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2227 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2228 | } |
703bcee0 | 2229 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2230 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2231 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2232 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2233 | goto err; | |
2234 | } | |
2235 | if (!tls1_process_sigalgs(s)) { | |
2236 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2237 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2238 | goto err; |
2239 | } | |
a0f63828 DSH |
2240 | } else { |
2241 | ssl_set_default_md(s); | |
0f113f3e MC |
2242 | } |
2243 | ||
2244 | /* get the CA RDNs */ | |
73999b62 | 2245 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2246 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2247 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2248 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2249 | goto err; |
2250 | } | |
2251 | ||
73999b62 MC |
2252 | while (PACKET_remaining(pkt)) { |
2253 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2254 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2255 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2256 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2257 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2258 | goto err; |
2259 | } | |
2260 | ||
ac112332 | 2261 | namestart = namebytes; |
0f113f3e | 2262 | |
ac112332 MC |
2263 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2264 | name_len)) == NULL) { | |
3c33c6f6 | 2265 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2266 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2267 | goto err; |
0f113f3e MC |
2268 | } |
2269 | ||
ac112332 | 2270 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2271 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2272 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2273 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2274 | goto err; | |
2275 | } | |
2276 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2277 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2278 | goto err; |
2279 | } | |
6afef8b1 | 2280 | xn = NULL; |
0f113f3e MC |
2281 | } |
2282 | ||
0f113f3e MC |
2283 | /* we should setup a certificate to return.... */ |
2284 | s->s3->tmp.cert_req = 1; | |
2285 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2286 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2287 | s->s3->tmp.ca_names = ca_sk; |
2288 | ca_sk = NULL; | |
2289 | ||
05c4f1d5 | 2290 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2291 | goto done; |
0f113f3e | 2292 | err: |
fe3a3291 | 2293 | ossl_statem_set_error(s); |
cc273a93 | 2294 | done: |
6afef8b1 | 2295 | X509_NAME_free(xn); |
222561fe | 2296 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2297 | return ret; |
0f113f3e MC |
2298 | } |
2299 | ||
2300 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2301 | { |
0f113f3e | 2302 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2303 | } |
dfeab068 | 2304 | |
be3583fa | 2305 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2306 | { |
6df55cac | 2307 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2308 | unsigned int ticklen; |
9ac6244b | 2309 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2310 | unsigned int sess_len; |
de1df7e9 | 2311 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2312 | |
73999b62 | 2313 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2314 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2315 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2316 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2317 | || (SSL_IS_TLS13(s) |
2318 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2319 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2320 | goto f_err; |
2321 | } | |
2322 | ||
de1df7e9 MC |
2323 | /* |
2324 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2325 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2326 | * be 0 here in that instance | |
2327 | */ | |
e711da71 | 2328 | if (ticklen == 0) |
c9de4a20 | 2329 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2330 | |
de1df7e9 | 2331 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2332 | if (s->session->session_id_length > 0) { |
2333 | int i = s->session_ctx->session_cache_mode; | |
2334 | SSL_SESSION *new_sess; | |
2335 | /* | |
2336 | * We reused an existing session, so we need to replace it with a new | |
2337 | * one | |
2338 | */ | |
2339 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2340 | /* | |
e4612d02 | 2341 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2342 | */ |
e4612d02 | 2343 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2344 | } |
2345 | ||
2346 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2347 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2348 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2349 | goto f_err; |
2350 | } | |
2351 | ||
2352 | SSL_SESSION_free(s->session); | |
2353 | s->session = new_sess; | |
2354 | } | |
2355 | ||
fc24f0bf MC |
2356 | /* |
2357 | * Technically the cast to long here is not guaranteed by the C standard - | |
2358 | * but we use it elsewhere, so this should be ok. | |
2359 | */ | |
2360 | s->session->time = (long)time(NULL); | |
2361 | ||
aff8c126 RS |
2362 | OPENSSL_free(s->session->ext.tick); |
2363 | s->session->ext.tick = NULL; | |
2364 | s->session->ext.ticklen = 0; | |
e711da71 | 2365 | |
aff8c126 RS |
2366 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2367 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2368 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2369 | goto err; |
2370 | } | |
aff8c126 | 2371 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2372 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2373 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2374 | goto f_err; |
2375 | } | |
e711da71 | 2376 | |
aff8c126 | 2377 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2378 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2379 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2380 | |
2381 | if (SSL_IS_TLS13(s)) { | |
2382 | PACKET extpkt; | |
2383 | ||
2384 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2385 | || !tls_collect_extensions(s, &extpkt, | |
2386 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
2387 | &exts, &al) | |
2388 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, | |
2389 | exts, NULL, 0, &al)) { | |
2390 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2391 | goto f_err; | |
2392 | } | |
2393 | } | |
2394 | ||
0f113f3e MC |
2395 | /* |
2396 | * There are two ways to detect a resumed ticket session. One is to set | |
2397 | * an appropriate session ID and then the server must return a match in | |
2398 | * ServerHello. This allows the normal client session ID matching to work | |
2399 | * and we know much earlier that the ticket has been accepted. The | |
2400 | * other way is to set zero length session ID when the ticket is | |
2401 | * presented and rely on the handshake to determine session resumption. | |
2402 | * We choose the former approach because this fits in with assumptions | |
2403 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2404 | * SHA256 is disabled) hash of the ticket. | |
2405 | */ | |
ec60ccc1 MC |
2406 | /* |
2407 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2408 | * but s->session->session_id_length is a size_t | |
2409 | */ | |
aff8c126 | 2410 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2411 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2412 | EVP_sha256(), NULL)) { |
2413 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2414 | goto err; | |
2415 | } | |
ec60ccc1 | 2416 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2417 | |
2418 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2419 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2420 | OPENSSL_free(exts); |
de1df7e9 MC |
2421 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2422 | return MSG_PROCESS_FINISHED_READING; | |
2423 | } | |
2424 | ||
b9908bf9 | 2425 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2426 | f_err: |
2427 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2428 | err: | |
fe3a3291 | 2429 | ossl_statem_set_error(s); |
33d93417 | 2430 | OPENSSL_free(exts); |
b9908bf9 | 2431 | return MSG_PROCESS_ERROR; |
0f113f3e | 2432 | } |
67c8e7f4 | 2433 | |
f63e4288 MC |
2434 | /* |
2435 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2436 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2437 | * |*al| is populated with a suitable alert code. | |
2438 | */ | |
2439 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2440 | { |
8b0e934a | 2441 | size_t resplen; |
b9908bf9 | 2442 | unsigned int type; |
b9908bf9 | 2443 | |
73999b62 | 2444 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2445 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2446 | *al = SSL_AD_DECODE_ERROR; |
2447 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2448 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2449 | return 0; | |
0f113f3e | 2450 | } |
56a26ce3 MC |
2451 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2452 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2453 | *al = SSL_AD_DECODE_ERROR; |
2454 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2455 | return 0; | |
0f113f3e | 2456 | } |
8cbfcc70 RS |
2457 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2458 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2459 | *al = SSL_AD_INTERNAL_ERROR; |
2460 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2461 | return 0; | |
0f113f3e | 2462 | } |
8cbfcc70 | 2463 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2464 | *al = SSL_AD_DECODE_ERROR; |
2465 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2466 | return 0; | |
ac63710a | 2467 | } |
8cbfcc70 | 2468 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2469 | |
2470 | return 1; | |
2471 | } | |
2faa1b48 | 2472 | |
f63e4288 MC |
2473 | |
2474 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2475 | { | |
2476 | int al; | |
2477 | ||
2478 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2479 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2480 | ossl_statem_set_error(s); | |
2481 | return MSG_PROCESS_ERROR; | |
2482 | } | |
2483 | ||
b9908bf9 | 2484 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2485 | } |
d02b48c6 | 2486 | |
7776a36c MC |
2487 | /* |
2488 | * Perform miscellaneous checks and processing after we have received the | |
2489 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2490 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2491 | * on failure. | |
7776a36c MC |
2492 | */ |
2493 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2494 | { |
a455d0f6 MC |
2495 | /* |
2496 | * at this point we check that we have the required stuff from | |
2497 | * the server | |
2498 | */ | |
2499 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2500 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2501 | return 0; | |
a455d0f6 MC |
2502 | } |
2503 | ||
bb1aaab4 | 2504 | /* |
aff8c126 RS |
2505 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2506 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2507 | * message, or NULL and -1 otherwise |
2508 | */ | |
aff8c126 RS |
2509 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2510 | && s->ctx->ext.status_cb != NULL) { | |
2511 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2512 | ||
bb1aaab4 | 2513 | if (ret == 0) { |
7776a36c MC |
2514 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2515 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2516 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2517 | return 0; |
bb1aaab4 MC |
2518 | } |
2519 | if (ret < 0) { | |
7776a36c MC |
2520 | *al = SSL_AD_INTERNAL_ERROR; |
2521 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2522 | ERR_R_MALLOC_FAILURE); | |
2523 | return 0; | |
bb1aaab4 MC |
2524 | } |
2525 | } | |
ed29e82a RP |
2526 | #ifndef OPENSSL_NO_CT |
2527 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2528 | /* Note we validate the SCTs whether or not we abort on error */ |
2529 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2530 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2531 | return 0; | |
ed29e82a RP |
2532 | } |
2533 | } | |
2534 | #endif | |
2535 | ||
7776a36c MC |
2536 | return 1; |
2537 | } | |
2538 | ||
2539 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2540 | { | |
2541 | int al = SSL_AD_INTERNAL_ERROR; | |
2542 | ||
2543 | if (PACKET_remaining(pkt) > 0) { | |
2544 | /* should contain no data */ | |
2545 | al = SSL_AD_DECODE_ERROR; | |
2546 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2547 | goto err; | |
2548 | } | |
2549 | #ifndef OPENSSL_NO_SRP | |
2550 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2551 | if (SRP_Calc_A_param(s) <= 0) { | |
2552 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2553 | goto err; | |
2554 | } | |
2555 | } | |
2556 | #endif | |
2557 | ||
2558 | /* | |
2559 | * Error queue messages are generated directly by this function | |
2560 | */ | |
2561 | if (!tls_process_initial_server_flight(s, &al)) | |
2562 | goto err; | |
2563 | ||
473483d4 MC |
2564 | #ifndef OPENSSL_NO_SCTP |
2565 | /* Only applies to renegotiation */ | |
2566 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2567 | && s->renegotiate != 0) |
473483d4 MC |
2568 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2569 | else | |
2570 | #endif | |
2571 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2572 | |
2573 | err: | |
2574 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2575 | ossl_statem_set_error(s); | |
2576 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2577 | } |
176f31dd | 2578 | |
f1ec23c0 | 2579 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2580 | { |
7689082b | 2581 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2582 | int ret = 0; |
2583 | /* | |
2584 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2585 | * \0-terminated identity. The last byte is for us for simulating | |
2586 | * strnlen. | |
2587 | */ | |
2588 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2589 | size_t identitylen = 0; | |
2590 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2591 | unsigned char *tmppsk = NULL; | |
2592 | char *tmpidentity = NULL; | |
2593 | size_t psklen = 0; | |
2594 | ||
2595 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2596 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2597 | *al = SSL_AD_INTERNAL_ERROR; |
2598 | goto err; | |
2599 | } | |
d02b48c6 | 2600 | |
13c0ec4a | 2601 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2602 | |
13c0ec4a MC |
2603 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2604 | identity, sizeof(identity) - 1, | |
2605 | psk, sizeof(psk)); | |
7689082b | 2606 | |
13c0ec4a | 2607 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2608 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2609 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2610 | goto err; | |
2611 | } else if (psklen == 0) { | |
05ec6a25 | 2612 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2613 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2614 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2615 | goto err; | |
2616 | } | |
7689082b | 2617 | |
13c0ec4a MC |
2618 | identitylen = strlen(identity); |
2619 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2620 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2621 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2622 | goto err; | |
2623 | } | |
7689082b | 2624 | |
13c0ec4a MC |
2625 | tmppsk = OPENSSL_memdup(psk, psklen); |
2626 | tmpidentity = OPENSSL_strdup(identity); | |
2627 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2628 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2629 | *al = SSL_AD_INTERNAL_ERROR; |
2630 | goto err; | |
2631 | } | |
7689082b | 2632 | |
13c0ec4a MC |
2633 | OPENSSL_free(s->s3->tmp.psk); |
2634 | s->s3->tmp.psk = tmppsk; | |
2635 | s->s3->tmp.psklen = psklen; | |
2636 | tmppsk = NULL; | |
2637 | OPENSSL_free(s->session->psk_identity); | |
2638 | s->session->psk_identity = tmpidentity; | |
2639 | tmpidentity = NULL; | |
f1ec23c0 | 2640 | |
b2b3024e | 2641 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2642 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2643 | *al = SSL_AD_INTERNAL_ERROR; | |
2644 | goto err; | |
2645 | } | |
7689082b | 2646 | |
13c0ec4a | 2647 | ret = 1; |
0bce0b02 | 2648 | |
13c0ec4a MC |
2649 | err: |
2650 | OPENSSL_cleanse(psk, psklen); | |
2651 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2652 | OPENSSL_clear_free(tmppsk, psklen); | |
2653 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2654 | |
13c0ec4a MC |
2655 | return ret; |
2656 | #else | |
05ec6a25 | 2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2658 | *al = SSL_AD_INTERNAL_ERROR; |
2659 | return 0; | |
b9908bf9 | 2660 | #endif |
13c0ec4a | 2661 | } |
b9908bf9 | 2662 | |
f1ec23c0 | 2663 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2664 | { |
bc36ee62 | 2665 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2666 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2667 | EVP_PKEY *pkey = NULL; |
2668 | EVP_PKEY_CTX *pctx = NULL; | |
2669 | size_t enclen; | |
2670 | unsigned char *pms = NULL; | |
2671 | size_t pmslen = 0; | |
b9908bf9 | 2672 | |
13c0ec4a MC |
2673 | if (s->session->peer == NULL) { |
2674 | /* | |
2675 | * We should always have a server certificate with SSL_kRSA. | |
2676 | */ | |
05ec6a25 | 2677 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2678 | return 0; |
2679 | } | |
0f113f3e | 2680 | |
13c0ec4a MC |
2681 | pkey = X509_get0_pubkey(s->session->peer); |
2682 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2683 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2684 | return 0; |
2685 | } | |
0f113f3e | 2686 | |
13c0ec4a MC |
2687 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2688 | pms = OPENSSL_malloc(pmslen); | |
2689 | if (pms == NULL) { | |
05ec6a25 | 2690 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2691 | *al = SSL_AD_INTERNAL_ERROR; |
2692 | return 0; | |
2693 | } | |
0bce0b02 | 2694 | |
13c0ec4a MC |
2695 | pms[0] = s->client_version >> 8; |
2696 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2697 | /* TODO(size_t): Convert this function */ |
2698 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2699 | goto err; |
2700 | } | |
0f113f3e | 2701 | |
13c0ec4a | 2702 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2703 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2704 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2705 | goto err; | |
2706 | } | |
13c0ec4a MC |
2707 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2708 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2709 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2710 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2711 | goto err; |
2712 | } | |
f1ec23c0 MC |
2713 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2714 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2715 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2716 | goto err; |
2717 | } | |
13c0ec4a MC |
2718 | EVP_PKEY_CTX_free(pctx); |
2719 | pctx = NULL; | |
0f113f3e | 2720 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2721 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2722 | (*p)[1]++; | |
2723 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2724 | tmp_buf[0] = 0x70; | |
0f113f3e | 2725 | # endif |
0f113f3e | 2726 | |
13c0ec4a | 2727 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2728 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2729 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2730 | goto err; | |
b9908bf9 | 2731 | } |
13c0ec4a MC |
2732 | |
2733 | s->s3->tmp.pms = pms; | |
2734 | s->s3->tmp.pmslen = pmslen; | |
2735 | ||
2faa1b48 CB |
2736 | /* Log the premaster secret, if logging is enabled. */ |
2737 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2738 | goto err; | |
2739 | ||
13c0ec4a MC |
2740 | return 1; |
2741 | err: | |
2742 | OPENSSL_clear_free(pms, pmslen); | |
2743 | EVP_PKEY_CTX_free(pctx); | |
2744 | ||
2745 | return 0; | |
2746 | #else | |
05ec6a25 | 2747 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2748 | *al = SSL_AD_INTERNAL_ERROR; |
2749 | return 0; | |
f9b3bff6 | 2750 | #endif |
13c0ec4a MC |
2751 | } |
2752 | ||
f1ec23c0 | 2753 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2754 | { |
2755 | #ifndef OPENSSL_NO_DH | |
2756 | DH *dh_clnt = NULL; | |
2757 | const BIGNUM *pub_key; | |
2758 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2759 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2760 | |
2761 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2762 | if (skey == NULL) |
2763 | goto err; | |
2764 | ||
0a699a07 | 2765 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2766 | if (ckey == NULL) |
2767 | goto err; | |
2768 | ||
a8c1c704 MC |
2769 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2770 | ||
0f1e51ea | 2771 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2772 | goto err; |
a8c1c704 MC |
2773 | |
2774 | /* send off the data */ | |
2775 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2776 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2777 | goto err; |
2778 | ||
2779 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2780 | EVP_PKEY_free(ckey); |
2781 | ||
2782 | return 1; | |
f1ec23c0 MC |
2783 | err: |
2784 | EVP_PKEY_free(ckey); | |
2785 | #endif | |
05ec6a25 | 2786 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2787 | *al = SSL_AD_INTERNAL_ERROR; |
2788 | return 0; | |
a8c1c704 MC |
2789 | } |
2790 | ||
f1ec23c0 | 2791 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2792 | { |
2793 | #ifndef OPENSSL_NO_EC | |
2794 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2795 | size_t encoded_pt_len = 0; |
67ad5aab | 2796 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2797 | int ret = 0; |
67ad5aab MC |
2798 | |
2799 | skey = s->s3->peer_tmp; | |
ec24630a | 2800 | if (skey == NULL) { |
05ec6a25 | 2801 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2802 | return 0; |
2803 | } | |
2804 | ||
0a699a07 | 2805 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2806 | if (ckey == NULL) { |
2807 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2808 | goto err; | |
2809 | } | |
67ad5aab | 2810 | |
0f1e51ea | 2811 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2812 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2813 | goto err; |
2814 | } | |
2815 | ||
2816 | /* Generate encoding of client key */ | |
ec24630a | 2817 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2818 | |
2819 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2820 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2821 | goto err; |
2822 | } | |
2823 | ||
b2b3024e | 2824 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2825 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2826 | goto err; | |
2827 | } | |
67ad5aab | 2828 | |
f1ec23c0 | 2829 | ret = 1; |
67ad5aab | 2830 | err: |
f1ec23c0 | 2831 | OPENSSL_free(encodedPoint); |
67ad5aab | 2832 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2833 | return ret; |
67ad5aab | 2834 | #else |
05ec6a25 | 2835 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2836 | *al = SSL_AD_INTERNAL_ERROR; |
2837 | return 0; | |
2838 | #endif | |
2839 | } | |
2840 | ||
f1ec23c0 | 2841 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2842 | { |
2843 | #ifndef OPENSSL_NO_GOST | |
2844 | /* GOST key exchange message creation */ | |
2845 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2846 | X509 *peer_cert; | |
2847 | size_t msglen; | |
2848 | unsigned int md_len; | |
2849 | unsigned char shared_ukm[32], tmp[256]; | |
2850 | EVP_MD_CTX *ukm_hash = NULL; | |
2851 | int dgst_nid = NID_id_GostR3411_94; | |
2852 | unsigned char *pms = NULL; | |
2853 | size_t pmslen = 0; | |
2854 | ||
2855 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2856 | dgst_nid = NID_id_GostR3411_2012_256; | |
2857 | ||
2858 | /* | |
2859 | * Get server sertificate PKEY and create ctx from it | |
2860 | */ | |
2861 | peer_cert = s->session->peer; | |
2862 | if (!peer_cert) { | |
2863 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2864 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2865 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2866 | return 0; | |
2867 | } | |
2868 | ||
2869 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2870 | if (pkey_ctx == NULL) { | |
2871 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2872 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2873 | return 0; |
2874 | } | |
2875 | /* | |
2876 | * If we have send a certificate, and certificate key | |
2877 | * parameters match those of server certificate, use | |
2878 | * certificate key for key exchange | |
2879 | */ | |
2880 | ||
2881 | /* Otherwise, generate ephemeral key pair */ | |
2882 | pmslen = 32; | |
2883 | pms = OPENSSL_malloc(pmslen); | |
2884 | if (pms == NULL) { | |
2885 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2886 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2887 | goto err; |
e00e0b3d MC |
2888 | } |
2889 | ||
2890 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2891 | /* Generate session key |
2892 | * TODO(size_t): Convert this function | |
2893 | */ | |
2894 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2895 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2896 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2897 | goto err; |
2898 | }; | |
e00e0b3d MC |
2899 | /* |
2900 | * Compute shared IV and store it in algorithm-specific context | |
2901 | * data | |
2902 | */ | |
2903 | ukm_hash = EVP_MD_CTX_new(); | |
2904 | if (ukm_hash == NULL | |
a230b26e EK |
2905 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2906 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2907 | SSL3_RANDOM_SIZE) <= 0 | |
2908 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2909 | SSL3_RANDOM_SIZE) <= 0 | |
2910 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2911 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2912 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2913 | goto err; |
2914 | } | |
2915 | EVP_MD_CTX_free(ukm_hash); | |
2916 | ukm_hash = NULL; | |
2917 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2918 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2919 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2920 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2921 | goto err; |
2922 | } | |
2923 | /* Make GOST keytransport blob message */ | |
2924 | /* | |
2925 | * Encapsulate it into sequence | |
2926 | */ | |
e00e0b3d MC |
2927 | msglen = 255; |
2928 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2929 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2930 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2931 | goto err; |
2932 | } | |
f1ec23c0 | 2933 | |
08029dfa MC |
2934 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2935 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2936 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2937 | *al = SSL_AD_INTERNAL_ERROR; |
2938 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2939 | goto err; | |
e00e0b3d | 2940 | } |
f1ec23c0 | 2941 | |
e00e0b3d MC |
2942 | EVP_PKEY_CTX_free(pkey_ctx); |
2943 | s->s3->tmp.pms = pms; | |
2944 | s->s3->tmp.pmslen = pmslen; | |
2945 | ||
2946 | return 1; | |
2947 | err: | |
2948 | EVP_PKEY_CTX_free(pkey_ctx); | |
2949 | OPENSSL_clear_free(pms, pmslen); | |
2950 | EVP_MD_CTX_free(ukm_hash); | |
2951 | return 0; | |
2952 | #else | |
05ec6a25 | 2953 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2954 | *al = SSL_AD_INTERNAL_ERROR; |
2955 | return 0; | |
2956 | #endif | |
2957 | } | |
2958 | ||
f1ec23c0 | 2959 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2960 | { |
8b9546c7 | 2961 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2962 | unsigned char *abytes = NULL; |
2963 | ||
2964 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2965 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2966 | &abytes)) { | |
05ec6a25 | 2967 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2968 | return 0; |
2969 | } | |
f1ec23c0 MC |
2970 | BN_bn2bin(s->srp_ctx.A, abytes); |
2971 | ||
840a2bf8 MC |
2972 | OPENSSL_free(s->session->srp_username); |
2973 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2974 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2975 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2976 | return 0; |
2977 | } | |
2978 | ||
2979 | return 1; | |
2980 | #else | |
05ec6a25 | 2981 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2982 | *al = SSL_AD_INTERNAL_ERROR; |
2983 | return 0; | |
2984 | #endif | |
2985 | } | |
2986 | ||
7cea05dc | 2987 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2988 | { |
13c0ec4a MC |
2989 | unsigned long alg_k; |
2990 | int al = -1; | |
2991 | ||
f1ec23c0 | 2992 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2993 | |
13c0ec4a | 2994 | if ((alg_k & SSL_PSK) |
7cea05dc | 2995 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2996 | goto err; |
2997 | ||
f1ec23c0 | 2998 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2999 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3000 | goto err; |
a8c1c704 | 3001 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3002 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3003 | goto err; |
67ad5aab | 3004 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3005 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3006 | goto err; |
e00e0b3d | 3007 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3008 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3009 | goto err; |
840a2bf8 | 3010 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3011 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3012 | goto err; |
4a424545 | 3013 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3014 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3015 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3016 | goto err; | |
3017 | } | |
3018 | ||
b9908bf9 | 3019 | return 1; |
0f113f3e | 3020 | err: |
13c0ec4a MC |
3021 | if (al != -1) |
3022 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3023 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3024 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3025 | #ifndef OPENSSL_NO_PSK |
3026 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3027 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3028 | #endif |
b9908bf9 MC |
3029 | return 0; |
3030 | } | |
3031 | ||
3032 | int tls_client_key_exchange_post_work(SSL *s) | |
3033 | { | |
3034 | unsigned char *pms = NULL; | |
3035 | size_t pmslen = 0; | |
3036 | ||
6f137370 MC |
3037 | pms = s->s3->tmp.pms; |
3038 | pmslen = s->s3->tmp.pmslen; | |
3039 | ||
b9908bf9 MC |
3040 | #ifndef OPENSSL_NO_SRP |
3041 | /* Check for SRP */ | |
3042 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3043 | if (!srp_generate_client_master_secret(s)) { | |
3044 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3045 | ERR_R_INTERNAL_ERROR); | |
3046 | goto err; | |
3047 | } | |
3048 | return 1; | |
3049 | } | |
3050 | #endif | |
b9908bf9 MC |
3051 | |
3052 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3053 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3054 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3055 | goto err; | |
3056 | } | |
3057 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3058 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3059 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3060 | /* ssl_generate_master_secret frees the pms even on error */ |
3061 | pms = NULL; | |
3062 | pmslen = 0; | |
b9908bf9 MC |
3063 | goto err; |
3064 | } | |
6f137370 MC |
3065 | pms = NULL; |
3066 | pmslen = 0; | |
473483d4 MC |
3067 | |
3068 | #ifndef OPENSSL_NO_SCTP | |
3069 | if (SSL_IS_DTLS(s)) { | |
3070 | unsigned char sctpauthkey[64]; | |
3071 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3072 | ||
3073 | /* | |
3074 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3075 | * used. | |
3076 | */ | |
141eb8c6 MC |
3077 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3078 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3079 | |
3080 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3081 | sizeof(sctpauthkey), labelbuffer, |
3082 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3083 | goto err; |
3084 | ||
3085 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3086 | sizeof(sctpauthkey), sctpauthkey); | |
3087 | } | |
3088 | #endif | |
3089 | ||
b9908bf9 MC |
3090 | return 1; |
3091 | err: | |
3092 | OPENSSL_clear_free(pms, pmslen); | |
3093 | s->s3->tmp.pms = NULL; | |
3094 | return 0; | |
0f113f3e | 3095 | } |
d02b48c6 | 3096 | |
0f113f3e MC |
3097 | /* |
3098 | * Check a certificate can be used for client authentication. Currently check | |
3099 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3100 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3101 | */ |
3102 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3103 | { |
0f113f3e | 3104 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3105 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3106 | return 0; |
3107 | /* | |
3108 | * If strict mode check suitability of chain before using it. This also | |
3109 | * adjusts suite B digest if necessary. | |
3110 | */ | |
3111 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3112 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3113 | return 0; | |
0f113f3e MC |
3114 | return 1; |
3115 | } | |
0d609395 | 3116 | |
be3583fa | 3117 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3118 | { |
3119 | X509 *x509 = NULL; | |
3120 | EVP_PKEY *pkey = NULL; | |
3121 | int i; | |
3122 | ||
b9908bf9 | 3123 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3124 | /* Let cert callback update client certificates if required */ |
3125 | if (s->cert->cert_cb) { | |
3126 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3127 | if (i < 0) { | |
3128 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3129 | return WORK_MORE_A; |
0f113f3e MC |
3130 | } |
3131 | if (i == 0) { | |
3132 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3133 | ossl_statem_set_error(s); |
0f113f3e MC |
3134 | return 0; |
3135 | } | |
3136 | s->rwstate = SSL_NOTHING; | |
3137 | } | |
3138 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3139 | return WORK_FINISHED_CONTINUE; |
3140 | ||
3141 | /* Fall through to WORK_MORE_B */ | |
3142 | wst = WORK_MORE_B; | |
0f113f3e MC |
3143 | } |
3144 | ||
3145 | /* We need to get a client cert */ | |
b9908bf9 | 3146 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3147 | /* |
3148 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3149 | * return(-1); We then get retied later | |
3150 | */ | |
0f113f3e MC |
3151 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3152 | if (i < 0) { | |
3153 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3154 | return WORK_MORE_B; |
0f113f3e MC |
3155 | } |
3156 | s->rwstate = SSL_NOTHING; | |
3157 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3158 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3159 | i = 0; | |
3160 | } else if (i == 1) { | |
3161 | i = 0; | |
b9908bf9 | 3162 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3163 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3164 | } | |
3165 | ||
222561fe | 3166 | X509_free(x509); |
25aaa98a | 3167 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3168 | if (i && !ssl3_check_client_certificate(s)) |
3169 | i = 0; | |
3170 | if (i == 0) { | |
3171 | if (s->version == SSL3_VERSION) { | |
3172 | s->s3->tmp.cert_req = 0; | |
3173 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3174 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3175 | } else { |
3176 | s->s3->tmp.cert_req = 2; | |
124037fd | 3177 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3178 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3179 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3180 | return 0; |
3181 | } | |
0f113f3e MC |
3182 | } |
3183 | } | |
3184 | ||
b9908bf9 | 3185 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3186 | } |
3187 | ||
b9908bf9 MC |
3188 | /* Shouldn't ever get here */ |
3189 | return WORK_ERROR; | |
3190 | } | |
3191 | ||
7cea05dc | 3192 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3193 | { |
0baed5e9 | 3194 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3195 | |
3196 | /* | |
3197 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3198 | * later | |
3199 | */ | |
3200 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3201 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3202 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3203 | : s->cert->key, |
3204 | &al)) { | |
b9908bf9 | 3205 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3206 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3207 | return 0; |
0f113f3e | 3208 | } |
b9908bf9 MC |
3209 | |
3210 | return 1; | |
0f113f3e MC |
3211 | } |
3212 | ||
3213 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3214 | |
36d16f8e | 3215 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3216 | { |
60f43e9e RL |
3217 | int i; |
3218 | #ifndef OPENSSL_NO_EC | |
3219 | int idx; | |
3220 | #endif | |
0f113f3e MC |
3221 | long alg_k, alg_a; |
3222 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3223 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3224 | |
0f113f3e MC |
3225 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3226 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3227 | |
0f113f3e | 3228 | /* we don't have a certificate */ |
55a9a16f | 3229 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3230 | return (1); |
d02b48c6 | 3231 | |
0f113f3e | 3232 | /* This is the passed certificate */ |
d02b48c6 | 3233 | |
10bf4fc2 | 3234 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3235 | idx = s->session->peer_type; |
0f113f3e | 3236 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3237 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3238 | /* check failed */ |
3239 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3240 | goto f_err; | |
3241 | } else { | |
3242 | return 1; | |
3243 | } | |
3244 | } else if (alg_a & SSL_aECDSA) { | |
3245 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3246 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3247 | goto f_err; | |
0f113f3e MC |
3248 | } |
3249 | #endif | |
8382fd3a | 3250 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3251 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3252 | |
3253 | /* Check that we have a certificate if we require one */ | |
3254 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3255 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3256 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3257 | goto f_err; | |
3258 | } | |
bc36ee62 | 3259 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3260 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3261 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3262 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3263 | goto f_err; | |
3264 | } | |
d02b48c6 | 3265 | #endif |
bc36ee62 | 3266 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3267 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3268 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3269 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3270 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3271 | goto f_err; | |
0f113f3e | 3272 | } |
79df9d62 | 3273 | #endif |
bc36ee62 | 3274 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3275 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3276 | al = SSL_AD_INTERNAL_ERROR; |
3277 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3278 | goto f_err; |
0f113f3e | 3279 | } |
d02b48c6 RE |
3280 | #endif |
3281 | ||
0f113f3e MC |
3282 | return (1); |
3283 | f_err: | |
26c79d56 | 3284 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3285 | return (0); |
3286 | } | |
3287 | ||
e481f9b9 | 3288 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3289 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3290 | { |
15e6be6c MC |
3291 | size_t len, padding_len; |
3292 | unsigned char *padding = NULL; | |
15e6be6c | 3293 | |
aff8c126 | 3294 | len = s->ext.npn_len; |
b9908bf9 | 3295 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3296 | |
aff8c126 | 3297 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3298 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3299 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3300 | goto err; | |
3301 | } | |
3302 | ||
3303 | memset(padding, 0, padding_len); | |
3304 | ||
b9908bf9 | 3305 | return 1; |
15e6be6c | 3306 | err: |
15e6be6c MC |
3307 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3308 | return 0; | |
b9908bf9 | 3309 | } |
6434abbf | 3310 | #endif |
368888bc | 3311 | |
c7f47786 MC |
3312 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3313 | { | |
3314 | if (PACKET_remaining(pkt) > 0) { | |
3315 | /* should contain no data */ | |
3316 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3317 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3318 | ossl_statem_set_error(s); | |
3319 | return MSG_PROCESS_ERROR; | |
3320 | } | |
3321 | ||
3322 | /* | |
1f04f23e MC |
3323 | * This is a historical discrepancy (not in the RFC) maintained for |
3324 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3325 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3326 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3327 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3328 | */ |
3329 | if (SSL_IS_DTLS(s)) | |
3330 | SSL_renegotiate(s); | |
3331 | else | |
3332 | SSL_renegotiate_abbreviated(s); | |
3333 | ||
3334 | return MSG_PROCESS_FINISHED_READING; | |
3335 | } | |
3336 | ||
e46f2334 MC |
3337 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3338 | { | |
3339 | int al = SSL_AD_INTERNAL_ERROR; | |
3340 | PACKET extensions; | |
3434f40b | 3341 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3342 | |
e46f2334 MC |
3343 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3344 | al = SSL_AD_DECODE_ERROR; | |
3345 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3346 | goto err; | |
3347 | } | |
3348 | ||
e96e0f8e | 3349 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
1266eefd | 3350 | &rawexts, &al) |
e96e0f8e | 3351 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3352 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3353 | goto err; |
3354 | ||
1b0286a3 | 3355 | OPENSSL_free(rawexts); |
e46f2334 MC |
3356 | return MSG_PROCESS_CONTINUE_READING; |
3357 | ||
3358 | err: | |
3359 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3360 | ossl_statem_set_error(s); | |
1b0286a3 | 3361 | OPENSSL_free(rawexts); |
e46f2334 MC |
3362 | return MSG_PROCESS_ERROR; |
3363 | } | |
3364 | ||
368888bc | 3365 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3366 | { |
3367 | int i = 0; | |
368888bc | 3368 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3369 | if (s->ctx->client_cert_engine) { |
3370 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3371 | SSL_get_client_CA_list(s), | |
3372 | px509, ppkey, NULL, NULL, NULL); | |
3373 | if (i != 0) | |
3374 | return i; | |
3375 | } | |
3376 | #endif | |
3377 | if (s->ctx->client_cert_cb) | |
3378 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3379 | return i; | |
3380 | } | |
d45ba43d | 3381 | |
ae2f7b37 | 3382 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3383 | { |
2c7b4dbc MC |
3384 | int i; |
3385 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3386 | int empty_reneg_info_scsv = !s->renegotiate; |
3387 | /* Set disabled masks for this session */ | |
3388 | ssl_set_client_disabled(s); | |
3389 | ||
3390 | if (sk == NULL) | |
3391 | return (0); | |
d45ba43d | 3392 | |
2c7b4dbc MC |
3393 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3394 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3395 | # error Max cipher length too short | |
3396 | # endif | |
3397 | /* | |
3398 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3399 | * chop number of supported ciphers to keep it well below this if we | |
3400 | * use TLS v1.2 | |
3401 | */ | |
3402 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3403 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3404 | else | |
3405 | #endif | |
3406 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3407 | maxlen = 0xfffe; | |
3408 | ||
3409 | if (empty_reneg_info_scsv) | |
3410 | maxlen -= 2; | |
3411 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3412 | maxlen -= 2; | |
3413 | ||
3414 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3415 | const SSL_CIPHER *c; | |
3416 | ||
d45ba43d MC |
3417 | c = sk_SSL_CIPHER_value(sk, i); |
3418 | /* Skip disabled ciphers */ | |
3419 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3420 | continue; | |
2c7b4dbc MC |
3421 | |
3422 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3423 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3424 | return 0; | |
3425 | } | |
3426 | ||
3427 | totlen += len; | |
d45ba43d | 3428 | } |
2c7b4dbc MC |
3429 | |
3430 | if (totlen == 0) { | |
3431 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | if (totlen != 0) { | |
d45ba43d MC |
3436 | if (empty_reneg_info_scsv) { |
3437 | static SSL_CIPHER scsv = { | |
3438 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3439 | }; | |
2c7b4dbc MC |
3440 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3441 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3442 | return 0; | |
3443 | } | |
d45ba43d MC |
3444 | } |
3445 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3446 | static SSL_CIPHER scsv = { | |
3447 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3448 | }; | |
2c7b4dbc MC |
3449 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3450 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3451 | return 0; | |
3452 | } | |
d45ba43d MC |
3453 | } |
3454 | } | |
3455 | ||
2c7b4dbc | 3456 | return 1; |
d45ba43d | 3457 | } |