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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
8c74b5e5 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 8 | */ |
846e33c7 | 9 | |
ea262260 BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
12 | * | |
0f113f3e | 13 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
15 | * | |
16 | * The Contribution is licensed pursuant to the OpenSSL open source | |
17 | * license provided above. | |
18 | * | |
ea262260 BM |
19 | * ECC cipher suite support in OpenSSL originally written by |
20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
21 | * | |
22 | */ | |
ddac1974 NL |
23 | /* ==================================================================== |
24 | * Copyright 2005 Nokia. All rights reserved. | |
25 | * | |
26 | * The portions of the attached software ("Contribution") is developed by | |
27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
28 | * license. | |
29 | * | |
30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
32 | * support (see RFC 4279) to OpenSSL. | |
33 | * | |
34 | * No patent licenses or other rights except those expressly stated in | |
35 | * the OpenSSL open source license shall be deemed granted or received | |
36 | * expressly, by implication, estoppel, or otherwise. | |
37 | * | |
38 | * No assurances are provided by Nokia that the Contribution does not | |
39 | * infringe the patent or other intellectual property rights of any third | |
40 | * party or that the license provides you with all the necessary rights | |
41 | * to make use of the Contribution. | |
42 | * | |
43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
47 | * OTHERWISE. | |
48 | */ | |
d02b48c6 RE |
49 | |
50 | #include <stdio.h> | |
fc24f0bf | 51 | #include <time.h> |
8ba708e5 | 52 | #include "../ssl_locl.h" |
61ae935a | 53 | #include "statem_locl.h" |
ec577822 BM |
54 | #include <openssl/buffer.h> |
55 | #include <openssl/rand.h> | |
56 | #include <openssl/objects.h> | |
57 | #include <openssl/evp.h> | |
dbad1690 | 58 | #include <openssl/md5.h> |
3c27208f | 59 | #include <openssl/dh.h> |
d095b68d | 60 | #include <openssl/bn.h> |
3c27208f | 61 | #include <openssl/engine.h> |
f9b3bff6 | 62 | |
3847d426 | 63 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
64 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
65 | ||
7ab09630 | 66 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 67 | static int key_exchange_expected(SSL *s); |
0f113f3e | 68 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 69 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 70 | WPACKET *pkt); |
ea262260 | 71 | |
61ae935a MC |
72 | /* |
73 | * Is a CertificateRequest message allowed at the moment or not? | |
74 | * | |
75 | * Return values are: | |
76 | * 1: Yes | |
77 | * 0: No | |
78 | */ | |
7ab09630 | 79 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
80 | { |
81 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 82 | if ((s->version > SSL3_VERSION |
a230b26e EK |
83 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
84 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
85 | return 0; |
86 | ||
87 | return 1; | |
88 | } | |
89 | ||
90 | /* | |
a455d0f6 | 91 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
92 | * |
93 | * Return values are: | |
94 | * 1: Yes | |
95 | * 0: No | |
96 | */ | |
a455d0f6 | 97 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
98 | { |
99 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
100 | ||
101 | /* | |
102 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 103 | * ciphersuite or for SRP |
61ae935a | 104 | */ |
a455d0f6 MC |
105 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
106 | | SSL_kSRP)) { | |
107 | return 1; | |
61ae935a MC |
108 | } |
109 | ||
a455d0f6 | 110 | return 0; |
61ae935a MC |
111 | } |
112 | ||
0f1e51ea MC |
113 | /* |
114 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
115 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
116 | * server. The message type that the server has sent is provided in |mt|. The | |
117 | * current state is in |s->statem.hand_state|. | |
118 | * | |
94ed2c67 MC |
119 | * Return values are 1 for success (transition allowed) and 0 on error |
120 | * (transition not allowed) | |
0f1e51ea MC |
121 | */ |
122 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
123 | { | |
124 | OSSL_STATEM *st = &s->statem; | |
125 | ||
126 | /* | |
127 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
128 | * yet negotiated TLSv1.3 at that point so that is handled by | |
129 | * ossl_statem_client_read_transition() | |
130 | */ | |
131 | ||
132 | switch (st->hand_state) { | |
133 | default: | |
134 | break; | |
135 | ||
3847d426 MC |
136 | case TLS_ST_CW_CLNT_HELLO: |
137 | /* | |
138 | * This must a ClientHello following a HelloRetryRequest, so the only | |
139 | * thing we can get now is a ServerHello. | |
140 | */ | |
141 | if (mt == SSL3_MT_SERVER_HELLO) { | |
142 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
143 | return 1; | |
144 | } | |
145 | break; | |
146 | ||
0f1e51ea | 147 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
148 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
149 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
150 | return 1; | |
151 | } | |
152 | break; | |
153 | ||
154 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 155 | if (s->hit) { |
92760c21 MC |
156 | if (mt == SSL3_MT_FINISHED) { |
157 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
158 | return 1; |
159 | } | |
160 | } else { | |
92760c21 MC |
161 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
162 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
163 | return 1; | |
f5ca0b04 MC |
164 | } |
165 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
166 | st->hand_state = TLS_ST_CR_CERT; |
167 | return 1; | |
168 | } | |
169 | } | |
170 | break; | |
171 | ||
92760c21 MC |
172 | case TLS_ST_CR_CERT_REQ: |
173 | if (mt == SSL3_MT_CERTIFICATE) { | |
174 | st->hand_state = TLS_ST_CR_CERT; | |
175 | return 1; | |
176 | } | |
177 | break; | |
178 | ||
0f1e51ea | 179 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
180 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
181 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
182 | return 1; | |
183 | } | |
184 | break; | |
185 | ||
186 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
187 | if (mt == SSL3_MT_FINISHED) { |
188 | st->hand_state = TLS_ST_CR_FINISHED; | |
189 | return 1; | |
190 | } | |
191 | break; | |
cc2455bf MC |
192 | |
193 | case TLS_ST_OK: | |
194 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
195 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
196 | return 1; | |
197 | } | |
e1c3de44 MC |
198 | if (mt == SSL3_MT_KEY_UPDATE) { |
199 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
200 | return 1; | |
201 | } | |
cc2455bf | 202 | break; |
0f1e51ea MC |
203 | } |
204 | ||
0f1e51ea | 205 | /* No valid transition found */ |
0f1e51ea MC |
206 | return 0; |
207 | } | |
208 | ||
61ae935a | 209 | /* |
8481f583 MC |
210 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
211 | * handshake state transitions when the client is reading messages from the | |
212 | * server. The message type that the server has sent is provided in |mt|. The | |
213 | * current state is in |s->statem.hand_state|. | |
61ae935a | 214 | * |
94ed2c67 MC |
215 | * Return values are 1 for success (transition allowed) and 0 on error |
216 | * (transition not allowed) | |
61ae935a | 217 | */ |
8481f583 | 218 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 219 | { |
d6f1a6e9 | 220 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 221 | int ske_expected; |
61ae935a | 222 | |
0f1e51ea | 223 | /* |
3847d426 MC |
224 | * Note that after writing the first ClientHello we don't know what version |
225 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 226 | */ |
f5ca0b04 | 227 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
228 | if (!ossl_statem_client13_read_transition(s, mt)) |
229 | goto err; | |
230 | return 1; | |
231 | } | |
0f1e51ea | 232 | |
a230b26e | 233 | switch (st->hand_state) { |
f3b3d7f0 RS |
234 | default: |
235 | break; | |
236 | ||
61ae935a MC |
237 | case TLS_ST_CW_CLNT_HELLO: |
238 | if (mt == SSL3_MT_SERVER_HELLO) { | |
239 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
240 | return 1; | |
241 | } | |
242 | ||
243 | if (SSL_IS_DTLS(s)) { | |
244 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
245 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
246 | return 1; | |
247 | } | |
3847d426 MC |
248 | } else { |
249 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
250 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
251 | return 1; | |
252 | } | |
61ae935a MC |
253 | } |
254 | break; | |
255 | ||
4004ce5f MC |
256 | case TLS_ST_CW_EARLY_DATA: |
257 | /* | |
258 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
259 | * data. The only thing allowed now is a ServerHello or a | |
260 | * HelloRetryRequest. | |
261 | */ | |
262 | if (mt == SSL3_MT_SERVER_HELLO) { | |
263 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
264 | return 1; | |
265 | } | |
266 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
267 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
268 | return 1; | |
269 | } | |
270 | break; | |
271 | ||
61ae935a MC |
272 | case TLS_ST_CR_SRVR_HELLO: |
273 | if (s->hit) { | |
aff8c126 | 274 | if (s->ext.ticket_expected) { |
61ae935a MC |
275 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
276 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
277 | return 1; | |
278 | } | |
279 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
280 | st->hand_state = TLS_ST_CR_CHANGE; | |
281 | return 1; | |
282 | } | |
283 | } else { | |
284 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
285 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
286 | return 1; | |
ad3819c2 | 287 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
288 | && s->ext.session_secret_cb != NULL |
289 | && s->session->ext.tick != NULL | |
a230b26e | 290 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
291 | /* |
292 | * Normally, we can tell if the server is resuming the session | |
293 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
294 | * the next server message after the ServerHello to determine if | |
295 | * the server is resuming. | |
296 | */ | |
297 | s->hit = 1; | |
298 | st->hand_state = TLS_ST_CR_CHANGE; | |
299 | return 1; | |
61ae935a | 300 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 301 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
302 | if (mt == SSL3_MT_CERTIFICATE) { |
303 | st->hand_state = TLS_ST_CR_CERT; | |
304 | return 1; | |
305 | } | |
306 | } else { | |
a455d0f6 | 307 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
308 | /* SKE is optional for some PSK ciphersuites */ |
309 | if (ske_expected | |
a230b26e EK |
310 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
311 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
312 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
313 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
314 | return 1; | |
315 | } | |
316 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
317 | && cert_req_allowed(s)) { |
318 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
319 | return 1; | |
a455d0f6 | 320 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
321 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
322 | return 1; | |
61ae935a MC |
323 | } |
324 | } | |
325 | } | |
326 | break; | |
327 | ||
328 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
329 | /* |
330 | * The CertificateStatus message is optional even if | |
aff8c126 | 331 | * |ext.status_expected| is set |
bb1aaab4 | 332 | */ |
aff8c126 | 333 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
334 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
335 | return 1; | |
a455d0f6 MC |
336 | } |
337 | /* Fall through */ | |
338 | ||
339 | case TLS_ST_CR_CERT_STATUS: | |
340 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 341 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
342 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
343 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
344 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
345 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
346 | return 1; | |
61ae935a | 347 | } |
672f3337 | 348 | goto err; |
61ae935a | 349 | } |
a455d0f6 | 350 | /* Fall through */ |
61ae935a | 351 | |
a455d0f6 MC |
352 | case TLS_ST_CR_KEY_EXCH: |
353 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
354 | if (cert_req_allowed(s)) { | |
61ae935a MC |
355 | st->hand_state = TLS_ST_CR_CERT_REQ; |
356 | return 1; | |
61ae935a | 357 | } |
672f3337 | 358 | goto err; |
61ae935a | 359 | } |
a455d0f6 | 360 | /* Fall through */ |
61ae935a MC |
361 | |
362 | case TLS_ST_CR_CERT_REQ: | |
363 | if (mt == SSL3_MT_SERVER_DONE) { | |
364 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
365 | return 1; | |
366 | } | |
367 | break; | |
368 | ||
369 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 370 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
371 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
372 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
373 | return 1; | |
374 | } | |
61ae935a MC |
375 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
376 | st->hand_state = TLS_ST_CR_CHANGE; | |
377 | return 1; | |
378 | } | |
379 | break; | |
380 | ||
381 | case TLS_ST_CR_SESSION_TICKET: | |
382 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
383 | st->hand_state = TLS_ST_CR_CHANGE; | |
384 | return 1; | |
385 | } | |
386 | break; | |
387 | ||
388 | case TLS_ST_CR_CHANGE: | |
389 | if (mt == SSL3_MT_FINISHED) { | |
390 | st->hand_state = TLS_ST_CR_FINISHED; | |
391 | return 1; | |
392 | } | |
393 | break; | |
c7f47786 MC |
394 | |
395 | case TLS_ST_OK: | |
4004ce5f | 396 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
397 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
398 | return 1; | |
399 | } | |
400 | break; | |
61ae935a MC |
401 | } |
402 | ||
672f3337 | 403 | err: |
61ae935a | 404 | /* No valid transition found */ |
672f3337 | 405 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 406 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
407 | return 0; |
408 | } | |
409 | ||
410 | /* | |
0f1e51ea MC |
411 | * ossl_statem_client13_write_transition() works out what handshake state to |
412 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
413 | * server. | |
0f1e51ea MC |
414 | */ |
415 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
416 | { | |
417 | OSSL_STATEM *st = &s->statem; | |
418 | ||
419 | /* | |
3847d426 MC |
420 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
421 | * TLSv1.3 yet at that point. They are handled by | |
422 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
423 | */ |
424 | switch (st->hand_state) { | |
425 | default: | |
426 | /* Shouldn't happen */ | |
427 | return WRITE_TRAN_ERROR; | |
428 | ||
3847d426 MC |
429 | case TLS_ST_CW_CLNT_HELLO: |
430 | /* We only hit this in the case of HelloRetryRequest */ | |
431 | return WRITE_TRAN_FINISHED; | |
432 | ||
433 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
434 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
435 | return WRITE_TRAN_CONTINUE; | |
436 | ||
92760c21 | 437 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 438 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 439 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
440 | return WRITE_TRAN_CONTINUE; |
441 | ||
442 | case TLS_ST_CW_CERT: | |
443 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 444 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 445 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
446 | return WRITE_TRAN_CONTINUE; |
447 | ||
448 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
449 | st->hand_state = TLS_ST_CW_FINISHED; |
450 | return WRITE_TRAN_CONTINUE; | |
451 | ||
e1c3de44 | 452 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
453 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
454 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
455 | return WRITE_TRAN_CONTINUE; | |
456 | } | |
457 | /* Fall through */ | |
458 | ||
9412b3ad | 459 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 460 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 461 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 462 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 463 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
464 | |
465 | case TLS_ST_OK: | |
9412b3ad MC |
466 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
467 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
468 | return WRITE_TRAN_CONTINUE; | |
469 | } | |
470 | ||
471 | /* Try to read from the server instead */ | |
cc2455bf | 472 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
473 | } |
474 | } | |
475 | ||
476 | /* | |
477 | * ossl_statem_client_write_transition() works out what handshake state to | |
478 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 479 | */ |
8481f583 | 480 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 481 | { |
d6f1a6e9 | 482 | OSSL_STATEM *st = &s->statem; |
61ae935a | 483 | |
0f1e51ea MC |
484 | /* |
485 | * Note that immediately before/after a ClientHello we don't know what | |
486 | * version we are going to negotiate yet, so we don't take this branch until | |
487 | * later | |
488 | */ | |
f5ca0b04 | 489 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
490 | return ossl_statem_client13_write_transition(s); |
491 | ||
a230b26e | 492 | switch (st->hand_state) { |
f3b3d7f0 RS |
493 | default: |
494 | /* Shouldn't happen */ | |
495 | return WRITE_TRAN_ERROR; | |
496 | ||
a230b26e | 497 | case TLS_ST_OK: |
c7f47786 MC |
498 | if (!s->renegotiate) { |
499 | /* | |
500 | * We haven't requested a renegotiation ourselves so we must have | |
501 | * received a message from the server. Better read it. | |
502 | */ | |
503 | return WRITE_TRAN_FINISHED; | |
504 | } | |
a230b26e EK |
505 | /* Renegotiation - fall through */ |
506 | case TLS_ST_BEFORE: | |
507 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
508 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 509 | |
a230b26e | 510 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
511 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
512 | /* | |
513 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
514 | * actually selected a version yet. | |
515 | */ | |
4004ce5f | 516 | st->hand_state = TLS_ST_CW_EARLY_DATA; |
49e7fe12 MC |
517 | return WRITE_TRAN_CONTINUE; |
518 | } | |
a230b26e EK |
519 | /* |
520 | * No transition at the end of writing because we don't know what | |
521 | * we will be sent | |
522 | */ | |
523 | return WRITE_TRAN_FINISHED; | |
61ae935a | 524 | |
4004ce5f MC |
525 | case TLS_ST_CW_EARLY_DATA: |
526 | return WRITE_TRAN_FINISHED; | |
527 | ||
a230b26e EK |
528 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
529 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
530 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 531 | |
a230b26e EK |
532 | case TLS_ST_CR_SRVR_DONE: |
533 | if (s->s3->tmp.cert_req) | |
534 | st->hand_state = TLS_ST_CW_CERT; | |
535 | else | |
61ae935a | 536 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 537 | return WRITE_TRAN_CONTINUE; |
61ae935a | 538 | |
a230b26e EK |
539 | case TLS_ST_CW_CERT: |
540 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
541 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 542 | |
a230b26e EK |
543 | case TLS_ST_CW_KEY_EXCH: |
544 | /* | |
545 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
546 | * sent, but no verify packet is sent | |
547 | */ | |
548 | /* | |
549 | * XXX: For now, we do not support client authentication in ECDH | |
550 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
551 | * need to skip the certificate verify message when client's | |
552 | * ECDH public key is sent inside the client certificate. | |
553 | */ | |
554 | if (s->s3->tmp.cert_req == 1) { | |
555 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
556 | } else { | |
61ae935a | 557 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
558 | } |
559 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
560 | st->hand_state = TLS_ST_CW_CHANGE; | |
561 | } | |
562 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 563 | |
a230b26e EK |
564 | case TLS_ST_CW_CERT_VRFY: |
565 | st->hand_state = TLS_ST_CW_CHANGE; | |
566 | return WRITE_TRAN_CONTINUE; | |
567 | ||
568 | case TLS_ST_CW_CHANGE: | |
61ae935a | 569 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
4004ce5f MC |
570 | st-> |
571 | hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 572 | #else |
aff8c126 | 573 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
574 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
575 | else | |
576 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 577 | #endif |
a230b26e | 578 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
579 | |
580 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
581 | case TLS_ST_CW_NEXT_PROTO: |
582 | st->hand_state = TLS_ST_CW_FINISHED; | |
583 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
584 | #endif |
585 | ||
a230b26e EK |
586 | case TLS_ST_CW_FINISHED: |
587 | if (s->hit) { | |
588 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
589 | return WRITE_TRAN_CONTINUE; |
590 | } else { | |
591 | return WRITE_TRAN_FINISHED; | |
592 | } | |
61ae935a | 593 | |
a230b26e EK |
594 | case TLS_ST_CR_FINISHED: |
595 | if (s->hit) { | |
596 | st->hand_state = TLS_ST_CW_CHANGE; | |
597 | return WRITE_TRAN_CONTINUE; | |
598 | } else { | |
599 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
600 | return WRITE_TRAN_CONTINUE; |
601 | } | |
c7f47786 MC |
602 | |
603 | case TLS_ST_CR_HELLO_REQ: | |
604 | /* | |
605 | * If we can renegotiate now then do so, otherwise wait for a more | |
606 | * convenient time. | |
607 | */ | |
608 | if (ssl3_renegotiate_check(s, 1)) { | |
609 | if (!tls_setup_handshake(s)) { | |
610 | ossl_statem_set_error(s); | |
611 | return WRITE_TRAN_ERROR; | |
612 | } | |
613 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
614 | return WRITE_TRAN_CONTINUE; | |
615 | } | |
616 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 617 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
618 | } |
619 | } | |
620 | ||
621 | /* | |
622 | * Perform any pre work that needs to be done prior to sending a message from | |
623 | * the client to the server. | |
624 | */ | |
8481f583 | 625 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 626 | { |
d6f1a6e9 | 627 | OSSL_STATEM *st = &s->statem; |
61ae935a | 628 | |
a230b26e | 629 | switch (st->hand_state) { |
f3b3d7f0 RS |
630 | default: |
631 | /* No pre work to be done */ | |
632 | break; | |
633 | ||
61ae935a MC |
634 | case TLS_ST_CW_CLNT_HELLO: |
635 | s->shutdown = 0; | |
636 | if (SSL_IS_DTLS(s)) { | |
637 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
638 | if (!ssl3_init_finished_mac(s)) { |
639 | ossl_statem_set_error(s); | |
640 | return WORK_ERROR; | |
641 | } | |
61ae935a MC |
642 | } |
643 | break; | |
644 | ||
61ae935a MC |
645 | case TLS_ST_CW_CHANGE: |
646 | if (SSL_IS_DTLS(s)) { | |
647 | if (s->hit) { | |
648 | /* | |
649 | * We're into the last flight so we don't retransmit these | |
650 | * messages unless we need to. | |
651 | */ | |
652 | st->use_timer = 0; | |
653 | } | |
654 | #ifndef OPENSSL_NO_SCTP | |
655 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
656 | return dtls_wait_for_dry(s); | |
657 | #endif | |
658 | } | |
f3b3d7f0 | 659 | break; |
61ae935a | 660 | |
4004ce5f | 661 | case TLS_ST_CW_EARLY_DATA: |
61ae935a | 662 | case TLS_ST_OK: |
30f05b19 | 663 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
664 | } |
665 | ||
666 | return WORK_FINISHED_CONTINUE; | |
667 | } | |
668 | ||
669 | /* | |
670 | * Perform any work that needs to be done after sending a message from the | |
671 | * client to the server. | |
672 | */ | |
8481f583 | 673 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 674 | { |
d6f1a6e9 | 675 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
676 | |
677 | s->init_num = 0; | |
678 | ||
a230b26e | 679 | switch (st->hand_state) { |
f3b3d7f0 RS |
680 | default: |
681 | /* No post work to be done */ | |
682 | break; | |
683 | ||
61ae935a | 684 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 685 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 686 | return WORK_MORE_A; |
46417569 | 687 | |
61ae935a MC |
688 | if (SSL_IS_DTLS(s)) { |
689 | /* Treat the next message as the first packet */ | |
690 | s->first_packet = 1; | |
691 | } | |
6cb42265 MC |
692 | |
693 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
694 | && s->max_early_data > 0) { | |
695 | /* | |
696 | * We haven't selected TLSv1.3 yet so we don't call the change | |
697 | * cipher state function associated with the SSL_METHOD. Instead | |
698 | * we call tls13_change_cipher_state() directly. | |
699 | */ | |
700 | if (!tls13_change_cipher_state(s, | |
701 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
1ea4d09a | 702 | return WORK_ERROR; |
6cb42265 | 703 | } |
61ae935a MC |
704 | break; |
705 | ||
706 | case TLS_ST_CW_KEY_EXCH: | |
707 | if (tls_client_key_exchange_post_work(s) == 0) | |
708 | return WORK_ERROR; | |
709 | break; | |
710 | ||
711 | case TLS_ST_CW_CHANGE: | |
712 | s->session->cipher = s->s3->tmp.new_cipher; | |
713 | #ifdef OPENSSL_NO_COMP | |
714 | s->session->compress_meth = 0; | |
715 | #else | |
716 | if (s->s3->tmp.new_compression == NULL) | |
717 | s->session->compress_meth = 0; | |
718 | else | |
719 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
720 | #endif | |
721 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
722 | return WORK_ERROR; | |
723 | ||
724 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
725 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
726 | return WORK_ERROR; | |
727 | ||
728 | if (SSL_IS_DTLS(s)) { | |
729 | #ifndef OPENSSL_NO_SCTP | |
730 | if (s->hit) { | |
731 | /* | |
732 | * Change to new shared key of SCTP-Auth, will be ignored if | |
733 | * no SCTP used. | |
734 | */ | |
735 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
736 | 0, NULL); | |
737 | } | |
738 | #endif | |
739 | ||
740 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
741 | } | |
742 | break; | |
743 | ||
744 | case TLS_ST_CW_FINISHED: | |
745 | #ifndef OPENSSL_NO_SCTP | |
746 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
747 | /* | |
748 | * Change to new shared key of SCTP-Auth, will be ignored if | |
749 | * no SCTP used. | |
750 | */ | |
751 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
752 | 0, NULL); | |
753 | } | |
754 | #endif | |
755 | if (statem_flush(s) != 1) | |
756 | return WORK_MORE_B; | |
92760c21 MC |
757 | |
758 | if (SSL_IS_TLS13(s)) { | |
759 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
760 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
761 | return WORK_ERROR; | |
762 | } | |
61ae935a | 763 | break; |
9412b3ad MC |
764 | |
765 | case TLS_ST_CW_KEY_UPDATE: | |
766 | if (statem_flush(s) != 1) | |
767 | return WORK_MORE_A; | |
57389a32 MC |
768 | if (!tls13_update_key(s, 1)) |
769 | return WORK_ERROR; | |
9412b3ad | 770 | break; |
61ae935a MC |
771 | } |
772 | ||
773 | return WORK_FINISHED_CONTINUE; | |
774 | } | |
775 | ||
776 | /* | |
6392fb8e MC |
777 | * Get the message construction function and message type for sending from the |
778 | * client | |
61ae935a MC |
779 | * |
780 | * Valid return values are: | |
781 | * 1: Success | |
782 | * 0: Error | |
783 | */ | |
6392fb8e | 784 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 785 | confunc_f *confunc, int *mt) |
61ae935a | 786 | { |
d6f1a6e9 | 787 | OSSL_STATEM *st = &s->statem; |
61ae935a | 788 | |
4a01c59f MC |
789 | switch (st->hand_state) { |
790 | default: | |
791 | /* Shouldn't happen */ | |
792 | return 0; | |
793 | ||
794 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 795 | if (SSL_IS_DTLS(s)) |
6392fb8e | 796 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 797 | else |
6392fb8e MC |
798 | *confunc = tls_construct_change_cipher_spec; |
799 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
800 | break; |
801 | ||
802 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
803 | *confunc = tls_construct_client_hello; |
804 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
805 | break; |
806 | ||
807 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
808 | *confunc = tls_construct_client_certificate; |
809 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
810 | break; |
811 | ||
812 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
813 | *confunc = tls_construct_client_key_exchange; |
814 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
815 | break; |
816 | ||
817 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 818 | *confunc = tls_construct_cert_verify; |
6392fb8e | 819 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 820 | break; |
61ae935a MC |
821 | |
822 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 823 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
824 | *confunc = tls_construct_next_proto; |
825 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 826 | break; |
61ae935a | 827 | #endif |
4a01c59f | 828 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
829 | *confunc = tls_construct_finished; |
830 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 831 | break; |
9412b3ad MC |
832 | |
833 | case TLS_ST_CW_KEY_UPDATE: | |
834 | *confunc = tls_construct_key_update; | |
835 | *mt = SSL3_MT_KEY_UPDATE; | |
836 | break; | |
4a01c59f | 837 | } |
5923ad4b | 838 | |
5923ad4b | 839 | return 1; |
61ae935a MC |
840 | } |
841 | ||
842 | /* | |
843 | * Returns the maximum allowed length for the current message that we are | |
844 | * reading. Excludes the message header. | |
845 | */ | |
eda75751 | 846 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 847 | { |
d6f1a6e9 | 848 | OSSL_STATEM *st = &s->statem; |
61ae935a | 849 | |
a230b26e | 850 | switch (st->hand_state) { |
f3b3d7f0 RS |
851 | default: |
852 | /* Shouldn't happen */ | |
853 | return 0; | |
854 | ||
a230b26e EK |
855 | case TLS_ST_CR_SRVR_HELLO: |
856 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 857 | |
a230b26e EK |
858 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
859 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 860 | |
3847d426 MC |
861 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
862 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
863 | ||
a230b26e EK |
864 | case TLS_ST_CR_CERT: |
865 | return s->max_cert_list; | |
61ae935a | 866 | |
2c5dfdc3 MC |
867 | case TLS_ST_CR_CERT_VRFY: |
868 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
869 | ||
a230b26e EK |
870 | case TLS_ST_CR_CERT_STATUS: |
871 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 872 | |
a230b26e EK |
873 | case TLS_ST_CR_KEY_EXCH: |
874 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 875 | |
a230b26e EK |
876 | case TLS_ST_CR_CERT_REQ: |
877 | /* | |
878 | * Set to s->max_cert_list for compatibility with previous releases. In | |
879 | * practice these messages can get quite long if servers are configured | |
880 | * to provide a long list of acceptable CAs | |
881 | */ | |
882 | return s->max_cert_list; | |
61ae935a | 883 | |
a230b26e EK |
884 | case TLS_ST_CR_SRVR_DONE: |
885 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 886 | |
a230b26e EK |
887 | case TLS_ST_CR_CHANGE: |
888 | if (s->version == DTLS1_BAD_VER) | |
889 | return 3; | |
890 | return CCS_MAX_LENGTH; | |
61ae935a | 891 | |
a230b26e EK |
892 | case TLS_ST_CR_SESSION_TICKET: |
893 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 894 | |
a230b26e EK |
895 | case TLS_ST_CR_FINISHED: |
896 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
897 | |
898 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
899 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
900 | |
901 | case TLS_ST_CR_KEY_UPDATE: | |
902 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 903 | } |
61ae935a MC |
904 | } |
905 | ||
906 | /* | |
907 | * Process a message that the client has been received from the server. | |
908 | */ | |
8481f583 | 909 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 910 | { |
d6f1a6e9 | 911 | OSSL_STATEM *st = &s->statem; |
61ae935a | 912 | |
a230b26e | 913 | switch (st->hand_state) { |
f3b3d7f0 RS |
914 | default: |
915 | /* Shouldn't happen */ | |
916 | return MSG_PROCESS_ERROR; | |
917 | ||
a230b26e EK |
918 | case TLS_ST_CR_SRVR_HELLO: |
919 | return tls_process_server_hello(s, pkt); | |
61ae935a | 920 | |
a230b26e EK |
921 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
922 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 923 | |
3847d426 MC |
924 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
925 | return tls_process_hello_retry_request(s, pkt); | |
926 | ||
a230b26e EK |
927 | case TLS_ST_CR_CERT: |
928 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 929 | |
2c5dfdc3 MC |
930 | case TLS_ST_CR_CERT_VRFY: |
931 | return tls_process_cert_verify(s, pkt); | |
932 | ||
a230b26e EK |
933 | case TLS_ST_CR_CERT_STATUS: |
934 | return tls_process_cert_status(s, pkt); | |
61ae935a | 935 | |
a230b26e EK |
936 | case TLS_ST_CR_KEY_EXCH: |
937 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 938 | |
a230b26e EK |
939 | case TLS_ST_CR_CERT_REQ: |
940 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 941 | |
a230b26e EK |
942 | case TLS_ST_CR_SRVR_DONE: |
943 | return tls_process_server_done(s, pkt); | |
61ae935a | 944 | |
a230b26e EK |
945 | case TLS_ST_CR_CHANGE: |
946 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 947 | |
a230b26e EK |
948 | case TLS_ST_CR_SESSION_TICKET: |
949 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 950 | |
a230b26e EK |
951 | case TLS_ST_CR_FINISHED: |
952 | return tls_process_finished(s, pkt); | |
e46f2334 | 953 | |
c7f47786 MC |
954 | case TLS_ST_CR_HELLO_REQ: |
955 | return tls_process_hello_req(s, pkt); | |
956 | ||
e46f2334 MC |
957 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
958 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
959 | |
960 | case TLS_ST_CR_KEY_UPDATE: | |
961 | return tls_process_key_update(s, pkt); | |
61ae935a | 962 | } |
61ae935a MC |
963 | } |
964 | ||
965 | /* | |
966 | * Perform any further processing required following the receipt of a message | |
967 | * from the server | |
968 | */ | |
8481f583 | 969 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 970 | { |
d6f1a6e9 | 971 | OSSL_STATEM *st = &s->statem; |
61ae935a | 972 | |
a230b26e | 973 | switch (st->hand_state) { |
f3b3d7f0 RS |
974 | default: |
975 | /* Shouldn't happen */ | |
976 | return WORK_ERROR; | |
977 | ||
05c4f1d5 MC |
978 | case TLS_ST_CR_CERT_REQ: |
979 | return tls_prepare_client_certificate(s, wst); | |
980 | ||
61ae935a MC |
981 | #ifndef OPENSSL_NO_SCTP |
982 | case TLS_ST_CR_SRVR_DONE: | |
983 | /* We only get here if we are using SCTP and we are renegotiating */ | |
984 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
985 | s->s3->in_read_app_data = 2; | |
986 | s->rwstate = SSL_READING; | |
987 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
988 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 989 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
990 | return WORK_MORE_A; |
991 | } | |
fe3a3291 | 992 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
993 | return WORK_FINISHED_STOP; |
994 | #endif | |
61ae935a | 995 | } |
61ae935a MC |
996 | } |
997 | ||
7cea05dc | 998 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 999 | { |
2c7b4dbc | 1000 | unsigned char *p; |
ec60ccc1 MC |
1001 | size_t sess_id_len; |
1002 | int i, protverr; | |
2c7b4dbc | 1003 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 1004 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1005 | SSL_COMP *comp; |
1006 | #endif | |
b9908bf9 | 1007 | SSL_SESSION *sess = s->session; |
0f113f3e | 1008 | |
7cea05dc | 1009 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1010 | /* Should not happen */ |
1011 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1012 | return 0; |
2c7b4dbc | 1013 | } |
0f113f3e | 1014 | |
b9908bf9 | 1015 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1016 | protverr = ssl_set_client_hello_version(s); |
1017 | if (protverr != 0) { | |
1018 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1019 | return 0; |
4fa52141 | 1020 | } |
0f113f3e | 1021 | |
a230b26e | 1022 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 1023 | /* |
b9908bf9 MC |
1024 | * In the case of EAP-FAST, we can have a pre-shared |
1025 | * "ticket" without a session ID. | |
0f113f3e | 1026 | */ |
aff8c126 | 1027 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
1028 | (sess->not_resumable)) { |
1029 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 1030 | return 0; |
b9908bf9 MC |
1031 | } |
1032 | /* else use the pre-loaded session */ | |
0f113f3e | 1033 | |
b9908bf9 | 1034 | p = s->s3->client_random; |
0f113f3e | 1035 | |
b9908bf9 MC |
1036 | /* |
1037 | * for DTLS if client_random is initialized, reuse it, we are | |
1038 | * required to use same upon reply to HelloVerify | |
1039 | */ | |
1040 | if (SSL_IS_DTLS(s)) { | |
1041 | size_t idx; | |
1042 | i = 1; | |
1043 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1044 | if (p[idx]) { | |
1045 | i = 0; | |
1046 | break; | |
0f113f3e | 1047 | } |
0f113f3e | 1048 | } |
b9908bf9 MC |
1049 | } else |
1050 | i = 1; | |
0f113f3e | 1051 | |
a230b26e | 1052 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 1053 | return 0; |
b9908bf9 | 1054 | |
b9908bf9 MC |
1055 | /*- |
1056 | * version indicates the negotiated version: for example from | |
1057 | * an SSLv2/v3 compatible client hello). The client_version | |
1058 | * field is the maximum version we permit and it is also | |
1059 | * used in RSA encrypted premaster secrets. Some servers can | |
1060 | * choke if we initially report a higher version then | |
1061 | * renegotiate to a lower one in the premaster secret. This | |
1062 | * didn't happen with TLS 1.0 as most servers supported it | |
1063 | * but it can with TLS 1.1 or later if the server only supports | |
1064 | * 1.0. | |
1065 | * | |
1066 | * Possible scenario with previous logic: | |
1067 | * 1. Client hello indicates TLS 1.2 | |
1068 | * 2. Server hello says TLS 1.0 | |
1069 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1070 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1071 | * 5. Server sends hello request to renegotiate. |
1072 | * 6. Client hello indicates TLS v1.0 as we now | |
1073 | * know that is maximum server supports. | |
1074 | * 7. Server chokes on RSA encrypted premaster secret | |
1075 | * containing version 1.0. | |
1076 | * | |
1077 | * For interoperability it should be OK to always use the | |
1078 | * maximum version we support in client hello and then rely | |
1079 | * on the checking of version to ensure the servers isn't | |
1080 | * being inconsistent: for example initially negotiating with | |
1081 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1082 | * client_version in client hello and not resetting it to | |
1083 | * the negotiated version. | |
cd998837 MC |
1084 | * |
1085 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1086 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1087 | */ |
7acb8b64 | 1088 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1089 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1090 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1091 | return 0; |
2c7b4dbc | 1092 | } |
b9908bf9 MC |
1093 | |
1094 | /* Session ID */ | |
f05bcf0f | 1095 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1096 | sess_id_len = 0; |
b9908bf9 | 1097 | else |
ec60ccc1 MC |
1098 | sess_id_len = s->session->session_id_length; |
1099 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1100 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1101 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1102 | sess_id_len)) | |
7cea05dc | 1103 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1104 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1105 | return 0; |
b9908bf9 | 1106 | } |
0f113f3e | 1107 | |
b9908bf9 MC |
1108 | /* cookie stuff for DTLS */ |
1109 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1110 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1111 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1112 | s->d1->cookie_len)) { |
b9908bf9 | 1113 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1114 | return 0; |
0f113f3e | 1115 | } |
b9908bf9 MC |
1116 | } |
1117 | ||
1118 | /* Ciphers supported */ | |
7cea05dc | 1119 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1120 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1121 | return 0; |
2c7b4dbc MC |
1122 | } |
1123 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1124 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1125 | return 0; | |
1126 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1127 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1128 | return 0; |
b9908bf9 | 1129 | } |
0f113f3e | 1130 | |
b9908bf9 | 1131 | /* COMPRESSION */ |
7cea05dc | 1132 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1133 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1134 | return 0; |
2c7b4dbc MC |
1135 | } |
1136 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1137 | if (ssl_allow_compression(s) |
1138 | && s->ctx->comp_methods | |
1139 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1140 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1141 | for (i = 0; i < compnum; i++) { | |
1142 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1143 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1144 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1145 | return 0; |
2c7b4dbc MC |
1146 | } |
1147 | } | |
b9908bf9 | 1148 | } |
09b6c2ef | 1149 | #endif |
2c7b4dbc | 1150 | /* Add the NULL method */ |
7cea05dc | 1151 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1152 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1153 | return 0; |
2c7b4dbc | 1154 | } |
761772d7 | 1155 | |
b9908bf9 | 1156 | /* TLS extensions */ |
30aeba43 | 1157 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1158 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1159 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1160 | return 0; |
b9908bf9 | 1161 | } |
0f113f3e | 1162 | |
b9908bf9 | 1163 | return 1; |
0f113f3e | 1164 | } |
d02b48c6 | 1165 | |
be3583fa | 1166 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1167 | { |
1168 | int al; | |
cb150cbc | 1169 | size_t cookie_len; |
8ba708e5 MC |
1170 | PACKET cookiepkt; |
1171 | ||
1172 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1173 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1174 | al = SSL_AD_DECODE_ERROR; |
1175 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1176 | goto f_err; | |
1177 | } | |
1178 | ||
1179 | cookie_len = PACKET_remaining(&cookiepkt); | |
1180 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1181 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1182 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1183 | goto f_err; | |
1184 | } | |
1185 | ||
1186 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1187 | al = SSL_AD_DECODE_ERROR; | |
1188 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1189 | goto f_err; | |
1190 | } | |
1191 | s->d1->cookie_len = cookie_len; | |
1192 | ||
1193 | return MSG_PROCESS_FINISHED_READING; | |
1194 | f_err: | |
1195 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1196 | ossl_statem_set_error(s); |
8ba708e5 MC |
1197 | return MSG_PROCESS_ERROR; |
1198 | } | |
1199 | ||
be3583fa | 1200 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1201 | { |
1202 | STACK_OF(SSL_CIPHER) *sk; | |
1203 | const SSL_CIPHER *c; | |
332eb390 | 1204 | PACKET session_id, extpkt; |
b9908bf9 | 1205 | size_t session_id_len; |
b6981744 | 1206 | const unsigned char *cipherchars; |
b9908bf9 MC |
1207 | int i, al = SSL_AD_INTERNAL_ERROR; |
1208 | unsigned int compression; | |
4fa52141 | 1209 | unsigned int sversion; |
3434f40b | 1210 | unsigned int context; |
4fa52141 | 1211 | int protverr; |
332eb390 | 1212 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1213 | #ifndef OPENSSL_NO_COMP |
1214 | SSL_COMP *comp; | |
1215 | #endif | |
1216 | ||
4fa52141 VD |
1217 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1218 | al = SSL_AD_DECODE_ERROR; | |
1219 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1220 | goto f_err; | |
1221 | } | |
50932c4a | 1222 | |
4ff65f77 | 1223 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1224 | protverr = ssl_choose_client_version(s, sversion); |
1225 | if (protverr != 0) { | |
1226 | al = SSL_AD_PROTOCOL_VERSION; | |
1227 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1228 | goto f_err; | |
0f113f3e | 1229 | } |
0f113f3e MC |
1230 | |
1231 | /* load the server hello data */ | |
1232 | /* load the server random */ | |
73999b62 | 1233 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1234 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1235 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1236 | goto f_err; |
1237 | } | |
0f113f3e | 1238 | |
fc5ce51d | 1239 | /* Get the session-id. */ |
71728dd8 MC |
1240 | if (!SSL_IS_TLS13(s)) { |
1241 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1242 | al = SSL_AD_DECODE_ERROR; | |
1243 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1244 | goto f_err; | |
1245 | } | |
1246 | session_id_len = PACKET_remaining(&session_id); | |
1247 | if (session_id_len > sizeof s->session->session_id | |
1248 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1249 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1250 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1251 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1252 | goto f_err; | |
1253 | } | |
1254 | } else { | |
625b0d51 | 1255 | PACKET_null_init(&session_id); |
71728dd8 | 1256 | session_id_len = 0; |
0f113f3e | 1257 | } |
e481f9b9 | 1258 | |
73999b62 | 1259 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1260 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1261 | al = SSL_AD_DECODE_ERROR; |
1262 | goto f_err; | |
1263 | } | |
1264 | ||
4ff65f77 MC |
1265 | if (!SSL_IS_TLS13(s)) { |
1266 | if (!PACKET_get_1(pkt, &compression)) { | |
1267 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1268 | al = SSL_AD_DECODE_ERROR; | |
1269 | goto f_err; | |
1270 | } | |
1271 | } else { | |
1272 | compression = 0; | |
1273 | } | |
1274 | ||
1275 | /* TLS extensions */ | |
1276 | if (PACKET_remaining(pkt) == 0) { | |
1277 | PACKET_null_init(&extpkt); | |
1278 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1279 | al = SSL_AD_DECODE_ERROR; | |
1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1281 | goto f_err; | |
1282 | } | |
1283 | ||
1284 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1285 | : EXT_TLS1_2_SERVER_HELLO; | |
fc5ece2e | 1286 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL)) |
4ff65f77 MC |
1287 | goto f_err; |
1288 | ||
1289 | s->hit = 0; | |
1290 | ||
1291 | if (SSL_IS_TLS13(s)) { | |
1292 | /* This will set s->hit if we are resuming */ | |
1293 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1294 | EXT_TLS1_3_SERVER_HELLO, | |
1295 | extensions, NULL, 0, &al)) | |
1296 | goto f_err; | |
1297 | } else { | |
8c1a5343 | 1298 | /* |
4ff65f77 MC |
1299 | * Check if we can resume the session based on external pre-shared |
1300 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1301 | * Resumption based on server-side state works with session IDs. | |
1302 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1303 | * works by overriding the SessionTicket extension at the application | |
1304 | * layer, and does not send a session ID. (We do not know whether | |
1305 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1306 | * ID alone is not a reliable indicator of session resumption, so we | |
1307 | * first check if we can resume, and later peek at the next handshake | |
1308 | * message to see if the server wants to resume. | |
8c1a5343 | 1309 | */ |
4ff65f77 MC |
1310 | if (s->version >= TLS1_VERSION |
1311 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1312 | const SSL_CIPHER *pref_cipher = NULL; | |
1313 | /* | |
1314 | * s->session->master_key_length is a size_t, but this is an int for | |
1315 | * backwards compat reasons | |
1316 | */ | |
1317 | int master_key_length; | |
1318 | master_key_length = sizeof(s->session->master_key); | |
1319 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1320 | &master_key_length, | |
1321 | NULL, &pref_cipher, | |
1322 | s->ext.session_secret_cb_arg) | |
1323 | && master_key_length > 0) { | |
1324 | s->session->master_key_length = master_key_length; | |
1325 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1326 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1327 | } else { |
1328 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1329 | al = SSL_AD_INTERNAL_ERROR; | |
1330 | goto f_err; | |
1331 | } | |
0f113f3e | 1332 | } |
4ff65f77 MC |
1333 | |
1334 | if (session_id_len != 0 | |
1335 | && session_id_len == s->session->session_id_length | |
1336 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1337 | session_id_len) == 0) | |
1338 | s->hit = 1; | |
50932c4a MC |
1339 | } |
1340 | ||
4ff65f77 | 1341 | if (s->hit) { |
0f113f3e | 1342 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1343 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1344 | /* actually a client application bug */ |
1345 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1346 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1347 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1348 | goto f_err; | |
1349 | } | |
6e3d0153 | 1350 | } else { |
0f113f3e | 1351 | /* |
6e3d0153 | 1352 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1353 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1354 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1355 | * so the PAC-based session secret is always preserved. It'll be | |
1356 | * overwritten if the server refuses resumption. | |
0f113f3e | 1357 | */ |
4ff65f77 MC |
1358 | if (s->session->session_id_length > 0 |
1359 | || (SSL_IS_TLS13(s) | |
1360 | && s->session->ext.tick_identity | |
1361 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1362 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1363 | if (!ssl_get_new_session(s, 0)) { |
1364 | goto f_err; | |
1365 | } | |
1366 | } | |
50932c4a | 1367 | |
ccae4a15 | 1368 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1369 | s->session->session_id_length = session_id_len; |
1370 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1371 | if (session_id_len > 0) |
1372 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1373 | session_id_len); | |
0f113f3e | 1374 | } |
fc5ce51d | 1375 | |
ccae4a15 FI |
1376 | /* Session version and negotiated protocol version should match */ |
1377 | if (s->version != s->session->ssl_version) { | |
1378 | al = SSL_AD_PROTOCOL_VERSION; | |
1379 | ||
1380 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1381 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1382 | goto f_err; | |
1383 | } | |
1384 | ||
60d685d1 | 1385 | c = ssl_get_cipher_by_char(s, cipherchars, 0); |
0f113f3e MC |
1386 | if (c == NULL) { |
1387 | /* unknown cipher */ | |
1388 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1389 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1390 | goto f_err; |
1391 | } | |
0f113f3e | 1392 | /* |
3eb2aff4 KR |
1393 | * Now that we know the version, update the check to see if it's an allowed |
1394 | * version. | |
1395 | */ | |
1396 | s->s3->tmp.min_ver = s->version; | |
1397 | s->s3->tmp.max_ver = s->version; | |
1398 | /* | |
1399 | * If it is a disabled cipher we either didn't send it in client hello, | |
1400 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1401 | */ |
1402 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1403 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1404 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1405 | goto f_err; |
1406 | } | |
0f113f3e MC |
1407 | |
1408 | sk = ssl_get_ciphers_by_id(s); | |
1409 | i = sk_SSL_CIPHER_find(sk, c); | |
1410 | if (i < 0) { | |
1411 | /* we did not say we would use this cipher */ | |
1412 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1413 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1414 | goto f_err; |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * Depending on the session caching (internal/external), the cipher | |
1419 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1420 | * set and use it for comparison. | |
1421 | */ | |
1422 | if (s->session->cipher) | |
1423 | s->session->cipher_id = s->session->cipher->id; | |
1424 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1425 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1426 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1427 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1428 | goto f_err; | |
0f113f3e MC |
1429 | } |
1430 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1431 | |
09b6c2ef | 1432 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1433 | if (compression != 0) { |
0f113f3e | 1434 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1435 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1436 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1437 | goto f_err; | |
1438 | } | |
1439 | /* | |
1440 | * If compression is disabled we'd better not try to resume a session | |
1441 | * using compression. | |
1442 | */ | |
1443 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1444 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1445 | goto f_err; |
1446 | } | |
09b6c2ef | 1447 | #else |
fc5ce51d | 1448 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1449 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1450 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1451 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1452 | goto f_err; | |
1453 | } | |
fc5ce51d | 1454 | if (compression == 0) |
0f113f3e MC |
1455 | comp = NULL; |
1456 | else if (!ssl_allow_compression(s)) { | |
1457 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1458 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1459 | goto f_err; |
fc5ce51d EK |
1460 | } else { |
1461 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1462 | } | |
0f113f3e | 1463 | |
fc5ce51d | 1464 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1465 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1466 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1467 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1468 | goto f_err; | |
1469 | } else { | |
1470 | s->s3->tmp.new_compression = comp; | |
1471 | } | |
09b6c2ef | 1472 | #endif |
761772d7 | 1473 | |
4ff65f77 | 1474 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1475 | goto f_err; |
1476 | ||
8723588e MC |
1477 | #ifndef OPENSSL_NO_SCTP |
1478 | if (SSL_IS_DTLS(s) && s->hit) { | |
1479 | unsigned char sctpauthkey[64]; | |
1480 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1481 | ||
1482 | /* | |
1483 | * Add new shared key for SCTP-Auth, will be ignored if | |
1484 | * no SCTP used. | |
1485 | */ | |
141eb8c6 MC |
1486 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1487 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1488 | |
1489 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1490 | sizeof(sctpauthkey), |
1491 | labelbuffer, | |
1492 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1493 | goto f_err; |
8723588e MC |
1494 | |
1495 | BIO_ctrl(SSL_get_wbio(s), | |
1496 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1497 | sizeof(sctpauthkey), sctpauthkey); | |
1498 | } | |
1499 | #endif | |
1500 | ||
92760c21 MC |
1501 | /* |
1502 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1503 | * we're done with this message | |
1504 | */ | |
1505 | if (SSL_IS_TLS13(s) | |
1506 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1507 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1508 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1509 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1510 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1511 | al = SSL_AD_INTERNAL_ERROR; | |
1512 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1513 | goto f_err; | |
1514 | } | |
1515 | ||
1b0286a3 | 1516 | OPENSSL_free(extensions); |
b9908bf9 | 1517 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1518 | f_err: |
1519 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1520 | ossl_statem_set_error(s); |
1b0286a3 | 1521 | OPENSSL_free(extensions); |
b9908bf9 | 1522 | return MSG_PROCESS_ERROR; |
0f113f3e | 1523 | } |
d02b48c6 | 1524 | |
3847d426 MC |
1525 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1526 | { | |
1527 | unsigned int sversion; | |
2248dbeb | 1528 | int errorcode; |
3847d426 MC |
1529 | RAW_EXTENSION *extensions = NULL; |
1530 | int al; | |
1531 | PACKET extpkt; | |
1532 | ||
1533 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1534 | al = SSL_AD_DECODE_ERROR; | |
1535 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1536 | goto f_err; | |
1537 | } | |
1538 | ||
1539 | s->hello_retry_request = 1; | |
1540 | ||
1541 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
2248dbeb MC |
1542 | errorcode = ssl_choose_client_version(s, sversion); |
1543 | if (errorcode != 0) { | |
3847d426 | 1544 | al = SSL_AD_PROTOCOL_VERSION; |
2248dbeb | 1545 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1546 | goto f_err; |
1547 | } | |
1548 | ||
1549 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1550 | al = SSL_AD_DECODE_ERROR; | |
1551 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1552 | goto f_err; | |
1553 | } | |
1554 | ||
1555 | if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, | |
fc5ece2e | 1556 | &extensions, &al, NULL) |
3847d426 MC |
1557 | || !tls_parse_all_extensions(s, EXT_TLS1_3_HELLO_RETRY_REQUEST, |
1558 | extensions, NULL, 0, &al)) | |
1559 | goto f_err; | |
1560 | ||
1561 | OPENSSL_free(extensions); | |
1562 | ||
1563 | return MSG_PROCESS_FINISHED_READING; | |
1564 | f_err: | |
1565 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1566 | ossl_statem_set_error(s); | |
1567 | OPENSSL_free(extensions); | |
1568 | return MSG_PROCESS_ERROR; | |
1569 | } | |
1570 | ||
be3583fa | 1571 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1572 | { |
1573 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1574 | unsigned long cert_list_len, cert_len; | |
1575 | X509 *x = NULL; | |
b6981744 | 1576 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1577 | STACK_OF(X509) *sk = NULL; |
1578 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1579 | size_t chainidx; |
e96e0f8e | 1580 | unsigned int context = 0; |
0f113f3e MC |
1581 | |
1582 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1583 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1584 | goto err; |
0f113f3e MC |
1585 | } |
1586 | ||
e96e0f8e MC |
1587 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1588 | || context != 0 | |
1589 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1590 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1591 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1592 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1593 | goto f_err; |
1594 | } | |
d805a57b | 1595 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1596 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1597 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1598 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1599 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1600 | SSL_R_CERT_LENGTH_MISMATCH); |
1601 | goto f_err; | |
1602 | } | |
1603 | ||
df758a85 MC |
1604 | certstart = certbytes; |
1605 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1606 | if (x == NULL) { |
1607 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1608 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1609 | goto f_err; |
1610 | } | |
df758a85 | 1611 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1612 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1613 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1614 | SSL_R_CERT_LENGTH_MISMATCH); |
1615 | goto f_err; | |
1616 | } | |
e96e0f8e MC |
1617 | |
1618 | if (SSL_IS_TLS13(s)) { | |
1619 | RAW_EXTENSION *rawexts = NULL; | |
1620 | PACKET extensions; | |
1621 | ||
1622 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1623 | al = SSL_AD_DECODE_ERROR; | |
1624 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1625 | goto f_err; | |
1626 | } | |
1627 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
fc5ece2e | 1628 | &rawexts, &al, NULL) |
e96e0f8e | 1629 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, |
5ee289ea MC |
1630 | rawexts, x, chainidx, &al)) { |
1631 | OPENSSL_free(rawexts); | |
e96e0f8e | 1632 | goto f_err; |
5ee289ea MC |
1633 | } |
1634 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1635 | } |
1636 | ||
0f113f3e | 1637 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1638 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1639 | goto err; |
0f113f3e MC |
1640 | } |
1641 | x = NULL; | |
0f113f3e MC |
1642 | } |
1643 | ||
1644 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1645 | /* |
1646 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1647 | * for client side verification of the server certificate to take place. | |
1648 | * However, historically the code has only checked that *any* flag is set | |
1649 | * to cause server verification to take place. Use of the other flags makes | |
1650 | * no sense in client mode. An attempt to clean up the semantics was | |
1651 | * reverted because at least one application *only* set | |
1652 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1653 | * server verification to take place, after the clean up it silently did | |
1654 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1655 | * sent to them because they are void functions. Therefore, we now use the | |
1656 | * (less clean) historic behaviour of performing validation if any flag is | |
1657 | * set. The *documented* interface remains the same. | |
1658 | */ | |
1659 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1660 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1661 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1662 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1663 | goto f_err; | |
1664 | } | |
1665 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1666 | if (i > 1) { | |
b9908bf9 | 1667 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1668 | al = SSL_AD_HANDSHAKE_FAILURE; |
1669 | goto f_err; | |
1670 | } | |
1671 | ||
c34b0f99 | 1672 | s->session->peer_chain = sk; |
0f113f3e MC |
1673 | /* |
1674 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1675 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1676 | */ |
1677 | x = sk_X509_value(sk, 0); | |
1678 | sk = NULL; | |
1679 | /* | |
1680 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1681 | */ | |
1682 | ||
8382fd3a | 1683 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1684 | |
55a9a16f | 1685 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1686 | x = NULL; |
1687 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1688 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1689 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1690 | goto f_err; | |
1691 | } | |
1692 | ||
1693 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1694 | if (i < 0) { |
0f113f3e MC |
1695 | x = NULL; |
1696 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1697 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1698 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1699 | goto f_err; | |
1700 | } | |
05b8486e DSH |
1701 | /* |
1702 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1703 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1704 | * type. | |
1705 | */ | |
1706 | if (!SSL_IS_TLS13(s)) { | |
1707 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1708 | if (exp_idx >= 0 && i != exp_idx | |
1709 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1710 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1711 | && i != SSL_PKEY_GOST01))) { | |
1712 | x = NULL; | |
1713 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1714 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1715 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1716 | goto f_err; | |
1717 | } | |
0f113f3e | 1718 | } |
a273c6ee | 1719 | s->session->peer_type = i; |
55a9a16f MC |
1720 | |
1721 | X509_free(s->session->peer); | |
05f0fb9f | 1722 | X509_up_ref(x); |
55a9a16f | 1723 | s->session->peer = x; |
0f113f3e | 1724 | s->session->verify_result = s->verify_result; |
0f113f3e | 1725 | x = NULL; |
2c5dfdc3 MC |
1726 | |
1727 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1728 | if (SSL_IS_TLS13(s) | |
1729 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1730 | sizeof(s->cert_verify_hash), | |
1731 | &s->cert_verify_hash_len)) { | |
1732 | al = SSL_AD_INTERNAL_ERROR; | |
1733 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1734 | goto f_err; | |
1735 | } | |
1736 | ||
b9908bf9 | 1737 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1738 | goto done; |
1739 | ||
0f113f3e | 1740 | f_err: |
66696478 | 1741 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1742 | err: |
fe3a3291 | 1743 | ossl_statem_set_error(s); |
66696478 | 1744 | done: |
0f113f3e MC |
1745 | X509_free(x); |
1746 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1747 | return ret; |
0f113f3e | 1748 | } |
d02b48c6 | 1749 | |
7dc1c647 | 1750 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1751 | { |
1752 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1753 | PACKET psk_identity_hint; |
02a74590 | 1754 | |
7dc1c647 MC |
1755 | /* PSK ciphersuites are preceded by an identity hint */ |
1756 | ||
1757 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1758 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1759 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1760 | return 0; |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * Store PSK identity hint for later use, hint is used in | |
1765 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1766 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1767 | * identity. | |
1768 | */ | |
1769 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1770 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1771 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1772 | return 0; |
1773 | } | |
02a74590 | 1774 | |
7dc1c647 MC |
1775 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1776 | OPENSSL_free(s->session->psk_identity_hint); | |
1777 | s->session->psk_identity_hint = NULL; | |
1778 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1779 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1780 | *al = SSL_AD_INTERNAL_ERROR; |
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | return 1; | |
1785 | #else | |
4fa88861 | 1786 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1787 | *al = SSL_AD_INTERNAL_ERROR; |
1788 | return 0; | |
02a74590 MC |
1789 | #endif |
1790 | } | |
1791 | ||
25c6c10c MC |
1792 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1793 | { | |
1794 | #ifndef OPENSSL_NO_SRP | |
1795 | PACKET prime, generator, salt, server_pub; | |
1796 | ||
1797 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1798 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1799 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1800 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1801 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1802 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1803 | return 0; |
1804 | } | |
1805 | ||
348240c6 | 1806 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1807 | if ((s->srp_ctx.N = |
1808 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1809 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1810 | || (s->srp_ctx.g = |
1811 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1812 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1813 | || (s->srp_ctx.s = |
1814 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1815 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1816 | || (s->srp_ctx.B = |
1817 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1818 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1819 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1820 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1821 | return 0; |
1822 | } | |
1823 | ||
1824 | if (!srp_verify_server_param(s, al)) { | |
1825 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1826 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1827 | return 0; |
1828 | } | |
1829 | ||
1830 | /* We must check if there is a certificate */ | |
a230b26e | 1831 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1832 | *pkey = X509_get0_pubkey(s->session->peer); |
1833 | ||
1834 | return 1; | |
1835 | #else | |
4fa88861 | 1836 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1837 | *al = SSL_AD_INTERNAL_ERROR; |
1838 | return 0; | |
1839 | #endif | |
1840 | } | |
1841 | ||
e01a610d MC |
1842 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1843 | { | |
1844 | #ifndef OPENSSL_NO_DH | |
1845 | PACKET prime, generator, pub_key; | |
1846 | EVP_PKEY *peer_tmp = NULL; | |
1847 | ||
1848 | DH *dh = NULL; | |
1849 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1850 | ||
26505153 RL |
1851 | int check_bits = 0; |
1852 | ||
e01a610d MC |
1853 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1854 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1855 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1856 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1857 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1858 | return 0; |
1859 | } | |
1860 | ||
1861 | peer_tmp = EVP_PKEY_new(); | |
1862 | dh = DH_new(); | |
1863 | ||
1864 | if (peer_tmp == NULL || dh == NULL) { | |
1865 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1866 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1867 | goto err; |
1868 | } | |
1869 | ||
348240c6 MC |
1870 | /* TODO(size_t): Convert these calls */ |
1871 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1872 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1873 | NULL); | |
1874 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1875 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1876 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1877 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1878 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1879 | goto err; |
1880 | } | |
1881 | ||
26505153 RL |
1882 | /* test non-zero pupkey */ |
1883 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1884 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1885 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1886 | goto err; |
1887 | } | |
1888 | ||
1889 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1890 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1891 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1892 | goto err; |
1893 | } | |
1894 | p = g = NULL; | |
1895 | ||
26505153 RL |
1896 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1897 | *al = SSL_AD_DECODE_ERROR; | |
1898 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1899 | goto err; | |
1900 | } | |
1901 | ||
e01a610d MC |
1902 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1903 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1904 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1905 | goto err; |
1906 | } | |
1907 | bnpub_key = NULL; | |
1908 | ||
1909 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1910 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1911 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1912 | goto err; |
1913 | } | |
1914 | ||
1915 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1916 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1917 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1918 | goto err; |
1919 | } | |
1920 | ||
1921 | s->s3->peer_tmp = peer_tmp; | |
1922 | ||
1923 | /* | |
1924 | * FIXME: This makes assumptions about which ciphersuites come with | |
1925 | * public keys. We should have a less ad-hoc way of doing this | |
1926 | */ | |
a230b26e | 1927 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1928 | *pkey = X509_get0_pubkey(s->session->peer); |
1929 | /* else anonymous DH, so no certificate or pkey. */ | |
1930 | ||
1931 | return 1; | |
1932 | ||
1933 | err: | |
1934 | BN_free(p); | |
1935 | BN_free(g); | |
1936 | BN_free(bnpub_key); | |
1937 | DH_free(dh); | |
1938 | EVP_PKEY_free(peer_tmp); | |
1939 | ||
1940 | return 0; | |
1941 | #else | |
4fa88861 | 1942 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1943 | *al = SSL_AD_INTERNAL_ERROR; |
1944 | return 0; | |
1945 | #endif | |
1946 | } | |
1947 | ||
ff74aeb1 MC |
1948 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1949 | { | |
1950 | #ifndef OPENSSL_NO_EC | |
1951 | PACKET encoded_pt; | |
1952 | const unsigned char *ecparams; | |
1953 | int curve_nid; | |
ec24630a | 1954 | unsigned int curve_flags; |
ff74aeb1 MC |
1955 | EVP_PKEY_CTX *pctx = NULL; |
1956 | ||
1957 | /* | |
1958 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1959 | * public key. For now we only support named (not generic) curves and | |
1960 | * ECParameters in this case is just three bytes. | |
1961 | */ | |
1962 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1963 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1964 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1965 | return 0; |
1966 | } | |
1967 | /* | |
1968 | * Check curve is one of our preferences, if not server has sent an | |
1969 | * invalid curve. ECParameters is 3 bytes. | |
1970 | */ | |
1971 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1972 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1973 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1974 | return 0; |
1975 | } | |
1976 | ||
ec24630a DSH |
1977 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1978 | ||
a230b26e | 1979 | if (curve_nid == 0) { |
ff74aeb1 | 1980 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1981 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1982 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1983 | return 0; | |
1984 | } | |
1985 | ||
ec24630a DSH |
1986 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1987 | EVP_PKEY *key = EVP_PKEY_new(); | |
1988 | ||
1989 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1990 | *al = SSL_AD_INTERNAL_ERROR; | |
1991 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1992 | EVP_PKEY_free(key); | |
1993 | return 0; | |
1994 | } | |
1995 | s->s3->peer_tmp = key; | |
1996 | } else { | |
1997 | /* Set up EVP_PKEY with named curve as parameters */ | |
1998 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1999 | if (pctx == NULL | |
2000 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2001 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2002 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2003 | *al = SSL_AD_INTERNAL_ERROR; | |
2004 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2005 | EVP_PKEY_CTX_free(pctx); | |
2006 | return 0; | |
2007 | } | |
ff74aeb1 | 2008 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2009 | pctx = NULL; |
ff74aeb1 | 2010 | } |
ff74aeb1 MC |
2011 | |
2012 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2013 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2014 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2015 | return 0; |
2016 | } | |
2017 | ||
ec24630a DSH |
2018 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2019 | PACKET_data(&encoded_pt), | |
2020 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 2021 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 2022 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2023 | return 0; |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2028 | * ECParameters in the server key exchange message. We do support RSA | |
2029 | * and ECDSA. | |
2030 | */ | |
2031 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2032 | *pkey = X509_get0_pubkey(s->session->peer); | |
2033 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2034 | *pkey = X509_get0_pubkey(s->session->peer); | |
2035 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2036 | ||
2037 | return 1; | |
2038 | #else | |
4fa88861 | 2039 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2040 | *al = SSL_AD_INTERNAL_ERROR; |
2041 | return 0; | |
2042 | #endif | |
2043 | } | |
2044 | ||
be3583fa | 2045 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2046 | { |
5554facb | 2047 | int al = -1; |
e1e588ac | 2048 | long alg_k; |
b9908bf9 | 2049 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2050 | EVP_MD_CTX *md_ctx = NULL; |
2051 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2052 | PACKET save_param_start, signature; |
b9908bf9 | 2053 | |
b9908bf9 MC |
2054 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2055 | ||
73999b62 | 2056 | save_param_start = *pkt; |
8d92c1f8 | 2057 | |
3260adf1 | 2058 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2059 | EVP_PKEY_free(s->s3->peer_tmp); |
2060 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2061 | #endif |
d02b48c6 | 2062 | |
7689082b | 2063 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2064 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2065 | goto err; | |
7689082b DSH |
2066 | } |
2067 | ||
2068 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2069 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2070 | } else if (alg_k & SSL_kSRP) { |
2071 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2072 | goto err; |
e01a610d MC |
2073 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2074 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2075 | goto err; | |
ff74aeb1 MC |
2076 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2077 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2078 | goto err; | |
0f113f3e MC |
2079 | } else if (alg_k) { |
2080 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2081 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2082 | goto err; |
0f113f3e | 2083 | } |
0f113f3e | 2084 | |
0f113f3e MC |
2085 | /* if it was signed, check the signature */ |
2086 | if (pkey != NULL) { | |
32942870 | 2087 | PACKET params; |
be8dba2c MC |
2088 | int maxsig; |
2089 | const EVP_MD *md = NULL; | |
e1e588ac | 2090 | |
32942870 EK |
2091 | /* |
2092 | * |pkt| now points to the beginning of the signature, so the difference | |
2093 | * equals the length of the parameters. | |
2094 | */ | |
2095 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2096 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2097 | PACKET_remaining(pkt))) { |
32942870 | 2098 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 2099 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2100 | goto err; |
32942870 EK |
2101 | } |
2102 | ||
0f113f3e | 2103 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2104 | unsigned int sigalg; |
0f113f3e | 2105 | int rv; |
703bcee0 MC |
2106 | |
2107 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2108 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2109 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2110 | goto err; |
0f113f3e | 2111 | } |
5554facb | 2112 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2113 | if (rv == -1) { |
2114 | al = SSL_AD_INTERNAL_ERROR; | |
2115 | goto err; | |
2116 | } else if (rv == 0) { | |
2117 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2118 | goto err; |
0f113f3e | 2119 | } |
a2f9200f | 2120 | #ifdef SSL_DEBUG |
0f113f3e MC |
2121 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2122 | #endif | |
f365a3e2 DSH |
2123 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2124 | al = SSL_AD_INTERNAL_ERROR; | |
2125 | goto err; | |
32942870 | 2126 | } |
0f113f3e | 2127 | |
f365a3e2 DSH |
2128 | md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx); |
2129 | ||
73999b62 MC |
2130 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2131 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2132 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2133 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2134 | goto err; |
0f113f3e | 2135 | } |
be8dba2c MC |
2136 | maxsig = EVP_PKEY_size(pkey); |
2137 | if (maxsig < 0) { | |
e1e588ac | 2138 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2139 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2140 | goto err; |
8098fc56 | 2141 | } |
0f113f3e MC |
2142 | |
2143 | /* | |
8098fc56 | 2144 | * Check signature length |
0f113f3e | 2145 | */ |
be8dba2c | 2146 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2147 | /* wrong packet length */ |
e1e588ac | 2148 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2149 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2150 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2151 | goto err; |
2152 | } | |
2153 | ||
2154 | md_ctx = EVP_MD_CTX_new(); | |
2155 | if (md_ctx == NULL) { | |
2156 | al = SSL_AD_INTERNAL_ERROR; | |
2157 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2158 | goto err; | |
0f113f3e | 2159 | } |
e1e588ac | 2160 | |
fe3066ee MC |
2161 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2162 | al = SSL_AD_INTERNAL_ERROR; | |
2163 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2164 | goto err; | |
2165 | } | |
5554facb | 2166 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2167 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2168 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2169 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2170 | al = SSL_AD_INTERNAL_ERROR; |
2171 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2172 | goto err; | |
2173 | } | |
2174 | } | |
2175 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2176 | SSL3_RANDOM_SIZE) <= 0 | |
2177 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2178 | SSL3_RANDOM_SIZE) <= 0 | |
2179 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2180 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2181 | al = SSL_AD_INTERNAL_ERROR; |
2182 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2183 | goto err; |
192e4bbb | 2184 | } |
fe3066ee MC |
2185 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2186 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2187 | /* bad signature */ |
2188 | al = SSL_AD_DECRYPT_ERROR; | |
2189 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2190 | goto err; |
0f113f3e | 2191 | } |
e1e588ac | 2192 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2193 | md_ctx = NULL; |
0f113f3e | 2194 | } else { |
7689082b | 2195 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2196 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2197 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2198 | /* Might be wrong key type, check it */ |
e1e588ac | 2199 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2200 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2201 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2202 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2203 | } else { |
2204 | al = SSL_AD_DECODE_ERROR; | |
2205 | } | |
0f113f3e MC |
2206 | goto err; |
2207 | } | |
2208 | /* still data left over */ | |
73999b62 | 2209 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2210 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2211 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2212 | goto err; |
0f113f3e MC |
2213 | } |
2214 | } | |
e1e588ac | 2215 | |
b9908bf9 | 2216 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2217 | err: |
7dc1c647 MC |
2218 | if (al != -1) |
2219 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2220 | ossl_statem_set_error(s); |
fe3066ee | 2221 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2222 | return MSG_PROCESS_ERROR; |
0f113f3e | 2223 | } |
d02b48c6 | 2224 | |
be3583fa | 2225 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2226 | { |
2227 | int ret = MSG_PROCESS_ERROR; | |
03f44b97 | 2228 | unsigned int i, name_len; |
b9908bf9 | 2229 | X509_NAME *xn = NULL; |
b6981744 | 2230 | const unsigned char *namestart, *namebytes; |
b9908bf9 | 2231 | STACK_OF(X509_NAME) *ca_sk = NULL; |
03f44b97 | 2232 | PACKET cadns; |
0f113f3e MC |
2233 | |
2234 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2235 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2236 | goto err; |
2237 | } | |
2238 | ||
03f44b97 DSH |
2239 | if (SSL_IS_TLS13(s)) { |
2240 | PACKET reqctx; | |
2241 | ||
2242 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2243 | OPENSSL_free(s->s3->tmp.ctype); | |
2244 | s->s3->tmp.ctype = NULL; | |
2245 | s->s3->tmp.ctype_len = 0; | |
2246 | /* TODO(TLS1.3) need to process request context, for now ignore */ | |
2247 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2248 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2249 | SSL_R_LENGTH_MISMATCH); | |
2250 | goto err; | |
2251 | } | |
2252 | } else { | |
2253 | PACKET ctypes; | |
75c13e78 | 2254 | |
03f44b97 DSH |
2255 | /* get the certificate types */ |
2256 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
2257 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2258 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2259 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2260 | goto err; |
03f44b97 DSH |
2261 | } |
2262 | ||
2263 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
2264 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); | |
2265 | goto err; | |
2266 | } | |
0f113f3e | 2267 | } |
ac112332 | 2268 | |
0f113f3e | 2269 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2270 | PACKET sigalgs; |
2271 | ||
2272 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2273 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2274 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2275 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2276 | goto err; |
2277 | } | |
ac112332 | 2278 | |
9195ddcd DSH |
2279 | /* Clear certificate validity flags */ |
2280 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 2281 | s->s3->tmp.valid_flags[i] = 0; |
703bcee0 | 2282 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2283 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2284 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2285 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2286 | goto err; | |
2287 | } | |
2288 | if (!tls1_process_sigalgs(s)) { | |
2289 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2290 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2291 | goto err; |
2292 | } | |
0f113f3e MC |
2293 | } |
2294 | ||
2295 | /* get the CA RDNs */ | |
03f44b97 | 2296 | if (!PACKET_get_length_prefixed_2(pkt, &cadns)) { |
0f113f3e | 2297 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2298 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2299 | goto err; |
2300 | } | |
2301 | ||
03f44b97 DSH |
2302 | while (PACKET_remaining(&cadns)) { |
2303 | if (!PACKET_get_net_2(&cadns, &name_len) | |
2304 | || !PACKET_get_bytes(&cadns, &namebytes, name_len)) { | |
0f113f3e | 2305 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2306 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2307 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2308 | goto err; |
2309 | } | |
2310 | ||
ac112332 | 2311 | namestart = namebytes; |
0f113f3e | 2312 | |
ac112332 MC |
2313 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2314 | name_len)) == NULL) { | |
3c33c6f6 | 2315 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2316 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2317 | goto err; |
0f113f3e MC |
2318 | } |
2319 | ||
ac112332 | 2320 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2321 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2322 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2323 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2324 | goto err; | |
2325 | } | |
2326 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2327 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2328 | goto err; |
2329 | } | |
6afef8b1 | 2330 | xn = NULL; |
0f113f3e | 2331 | } |
03f44b97 DSH |
2332 | /* TODO(TLS1.3) need to parse and process extensions, for now ignore */ |
2333 | if (SSL_IS_TLS13(s)) { | |
2334 | PACKET reqexts; | |
2335 | ||
2336 | if (!PACKET_get_length_prefixed_2(pkt, &reqexts)) { | |
2337 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2338 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2339 | SSL_R_EXT_LENGTH_MISMATCH); | |
2340 | goto err; | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | if (PACKET_remaining(pkt) != 0) { | |
2345 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2346 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2347 | goto err; | |
2348 | } | |
0f113f3e | 2349 | |
0f113f3e MC |
2350 | /* we should setup a certificate to return.... */ |
2351 | s->s3->tmp.cert_req = 1; | |
222561fe | 2352 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2353 | s->s3->tmp.ca_names = ca_sk; |
2354 | ca_sk = NULL; | |
2355 | ||
05c4f1d5 | 2356 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2357 | goto done; |
0f113f3e | 2358 | err: |
fe3a3291 | 2359 | ossl_statem_set_error(s); |
cc273a93 | 2360 | done: |
6afef8b1 | 2361 | X509_NAME_free(xn); |
222561fe | 2362 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2363 | return ret; |
0f113f3e MC |
2364 | } |
2365 | ||
2366 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2367 | { |
0f113f3e | 2368 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2369 | } |
dfeab068 | 2370 | |
be3583fa | 2371 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2372 | { |
6df55cac | 2373 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2374 | unsigned int ticklen; |
9ac6244b | 2375 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2376 | unsigned int sess_len; |
de1df7e9 | 2377 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2378 | |
73999b62 | 2379 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2380 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2381 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2382 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2383 | || (SSL_IS_TLS13(s) |
2384 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2385 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2386 | goto f_err; |
2387 | } | |
2388 | ||
de1df7e9 MC |
2389 | /* |
2390 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2391 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2392 | * be 0 here in that instance | |
2393 | */ | |
e711da71 | 2394 | if (ticklen == 0) |
c9de4a20 | 2395 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2396 | |
de1df7e9 | 2397 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2398 | if (s->session->session_id_length > 0) { |
2399 | int i = s->session_ctx->session_cache_mode; | |
2400 | SSL_SESSION *new_sess; | |
2401 | /* | |
2402 | * We reused an existing session, so we need to replace it with a new | |
2403 | * one | |
2404 | */ | |
2405 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2406 | /* | |
e4612d02 | 2407 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2408 | */ |
e4612d02 | 2409 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2410 | } |
2411 | ||
2412 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2413 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2414 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2415 | goto f_err; |
2416 | } | |
2417 | ||
2418 | SSL_SESSION_free(s->session); | |
2419 | s->session = new_sess; | |
2420 | } | |
2421 | ||
fc24f0bf MC |
2422 | /* |
2423 | * Technically the cast to long here is not guaranteed by the C standard - | |
2424 | * but we use it elsewhere, so this should be ok. | |
2425 | */ | |
2426 | s->session->time = (long)time(NULL); | |
2427 | ||
aff8c126 RS |
2428 | OPENSSL_free(s->session->ext.tick); |
2429 | s->session->ext.tick = NULL; | |
2430 | s->session->ext.ticklen = 0; | |
e711da71 | 2431 | |
aff8c126 RS |
2432 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2433 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2434 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2435 | goto err; |
2436 | } | |
aff8c126 | 2437 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2438 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2439 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2440 | goto f_err; |
2441 | } | |
e711da71 | 2442 | |
aff8c126 | 2443 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2444 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2445 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2446 | |
2447 | if (SSL_IS_TLS13(s)) { | |
2448 | PACKET extpkt; | |
2449 | ||
2450 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2451 | || !tls_collect_extensions(s, &extpkt, | |
2452 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
fc5ece2e | 2453 | &exts, &al, NULL) |
de1df7e9 MC |
2454 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, |
2455 | exts, NULL, 0, &al)) { | |
2456 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2457 | goto f_err; | |
2458 | } | |
2459 | } | |
2460 | ||
0f113f3e MC |
2461 | /* |
2462 | * There are two ways to detect a resumed ticket session. One is to set | |
2463 | * an appropriate session ID and then the server must return a match in | |
2464 | * ServerHello. This allows the normal client session ID matching to work | |
2465 | * and we know much earlier that the ticket has been accepted. The | |
2466 | * other way is to set zero length session ID when the ticket is | |
2467 | * presented and rely on the handshake to determine session resumption. | |
2468 | * We choose the former approach because this fits in with assumptions | |
2469 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2470 | * SHA256 is disabled) hash of the ticket. | |
2471 | */ | |
ec60ccc1 MC |
2472 | /* |
2473 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2474 | * but s->session->session_id_length is a size_t | |
2475 | */ | |
aff8c126 | 2476 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2477 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2478 | EVP_sha256(), NULL)) { |
2479 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2480 | goto err; | |
2481 | } | |
ec60ccc1 | 2482 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2483 | |
2484 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2485 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2486 | OPENSSL_free(exts); |
de1df7e9 MC |
2487 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2488 | return MSG_PROCESS_FINISHED_READING; | |
2489 | } | |
2490 | ||
b9908bf9 | 2491 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2492 | f_err: |
2493 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2494 | err: | |
fe3a3291 | 2495 | ossl_statem_set_error(s); |
33d93417 | 2496 | OPENSSL_free(exts); |
b9908bf9 | 2497 | return MSG_PROCESS_ERROR; |
0f113f3e | 2498 | } |
67c8e7f4 | 2499 | |
f63e4288 MC |
2500 | /* |
2501 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2502 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2503 | * |*al| is populated with a suitable alert code. | |
2504 | */ | |
2505 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2506 | { |
8b0e934a | 2507 | size_t resplen; |
b9908bf9 | 2508 | unsigned int type; |
b9908bf9 | 2509 | |
73999b62 | 2510 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2511 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2512 | *al = SSL_AD_DECODE_ERROR; |
2513 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2514 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2515 | return 0; | |
0f113f3e | 2516 | } |
56a26ce3 MC |
2517 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2518 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2519 | *al = SSL_AD_DECODE_ERROR; |
2520 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2521 | return 0; | |
0f113f3e | 2522 | } |
8cbfcc70 RS |
2523 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2524 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2525 | *al = SSL_AD_INTERNAL_ERROR; |
2526 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2527 | return 0; | |
0f113f3e | 2528 | } |
8cbfcc70 | 2529 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2530 | *al = SSL_AD_DECODE_ERROR; |
2531 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2532 | return 0; | |
ac63710a | 2533 | } |
8cbfcc70 | 2534 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2535 | |
2536 | return 1; | |
2537 | } | |
2faa1b48 | 2538 | |
f63e4288 MC |
2539 | |
2540 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2541 | { | |
2542 | int al; | |
2543 | ||
2544 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2545 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2546 | ossl_statem_set_error(s); | |
2547 | return MSG_PROCESS_ERROR; | |
2548 | } | |
2549 | ||
b9908bf9 | 2550 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2551 | } |
d02b48c6 | 2552 | |
7776a36c MC |
2553 | /* |
2554 | * Perform miscellaneous checks and processing after we have received the | |
2555 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2556 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2557 | * on failure. | |
7776a36c MC |
2558 | */ |
2559 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2560 | { |
a455d0f6 MC |
2561 | /* |
2562 | * at this point we check that we have the required stuff from | |
2563 | * the server | |
2564 | */ | |
2565 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2566 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2567 | return 0; | |
a455d0f6 MC |
2568 | } |
2569 | ||
bb1aaab4 | 2570 | /* |
aff8c126 RS |
2571 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2572 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2573 | * message, or NULL and -1 otherwise |
2574 | */ | |
aff8c126 RS |
2575 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2576 | && s->ctx->ext.status_cb != NULL) { | |
2577 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2578 | ||
bb1aaab4 | 2579 | if (ret == 0) { |
7776a36c MC |
2580 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2581 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2582 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2583 | return 0; |
bb1aaab4 MC |
2584 | } |
2585 | if (ret < 0) { | |
7776a36c MC |
2586 | *al = SSL_AD_INTERNAL_ERROR; |
2587 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2588 | ERR_R_MALLOC_FAILURE); | |
2589 | return 0; | |
bb1aaab4 MC |
2590 | } |
2591 | } | |
ed29e82a RP |
2592 | #ifndef OPENSSL_NO_CT |
2593 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2594 | /* Note we validate the SCTs whether or not we abort on error */ |
2595 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2596 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2597 | return 0; | |
ed29e82a RP |
2598 | } |
2599 | } | |
2600 | #endif | |
2601 | ||
7776a36c MC |
2602 | return 1; |
2603 | } | |
2604 | ||
2605 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2606 | { | |
2607 | int al = SSL_AD_INTERNAL_ERROR; | |
2608 | ||
2609 | if (PACKET_remaining(pkt) > 0) { | |
2610 | /* should contain no data */ | |
2611 | al = SSL_AD_DECODE_ERROR; | |
2612 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2613 | goto err; | |
2614 | } | |
2615 | #ifndef OPENSSL_NO_SRP | |
2616 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2617 | if (SRP_Calc_A_param(s) <= 0) { | |
2618 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2619 | goto err; | |
2620 | } | |
2621 | } | |
2622 | #endif | |
2623 | ||
2624 | /* | |
2625 | * Error queue messages are generated directly by this function | |
2626 | */ | |
2627 | if (!tls_process_initial_server_flight(s, &al)) | |
2628 | goto err; | |
2629 | ||
473483d4 MC |
2630 | #ifndef OPENSSL_NO_SCTP |
2631 | /* Only applies to renegotiation */ | |
2632 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2633 | && s->renegotiate != 0) |
473483d4 MC |
2634 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2635 | else | |
2636 | #endif | |
2637 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2638 | |
2639 | err: | |
2640 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2641 | ossl_statem_set_error(s); | |
2642 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2643 | } |
176f31dd | 2644 | |
f1ec23c0 | 2645 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2646 | { |
7689082b | 2647 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2648 | int ret = 0; |
2649 | /* | |
2650 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2651 | * \0-terminated identity. The last byte is for us for simulating | |
2652 | * strnlen. | |
2653 | */ | |
2654 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2655 | size_t identitylen = 0; | |
2656 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2657 | unsigned char *tmppsk = NULL; | |
2658 | char *tmpidentity = NULL; | |
2659 | size_t psklen = 0; | |
2660 | ||
2661 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2662 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2663 | *al = SSL_AD_INTERNAL_ERROR; |
2664 | goto err; | |
2665 | } | |
d02b48c6 | 2666 | |
13c0ec4a | 2667 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2668 | |
13c0ec4a MC |
2669 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2670 | identity, sizeof(identity) - 1, | |
2671 | psk, sizeof(psk)); | |
7689082b | 2672 | |
13c0ec4a | 2673 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2674 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2675 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2676 | goto err; | |
2677 | } else if (psklen == 0) { | |
05ec6a25 | 2678 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2679 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2680 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2681 | goto err; | |
2682 | } | |
7689082b | 2683 | |
13c0ec4a MC |
2684 | identitylen = strlen(identity); |
2685 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2686 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2687 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2688 | goto err; | |
2689 | } | |
7689082b | 2690 | |
13c0ec4a MC |
2691 | tmppsk = OPENSSL_memdup(psk, psklen); |
2692 | tmpidentity = OPENSSL_strdup(identity); | |
2693 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2694 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2695 | *al = SSL_AD_INTERNAL_ERROR; |
2696 | goto err; | |
2697 | } | |
7689082b | 2698 | |
13c0ec4a MC |
2699 | OPENSSL_free(s->s3->tmp.psk); |
2700 | s->s3->tmp.psk = tmppsk; | |
2701 | s->s3->tmp.psklen = psklen; | |
2702 | tmppsk = NULL; | |
2703 | OPENSSL_free(s->session->psk_identity); | |
2704 | s->session->psk_identity = tmpidentity; | |
2705 | tmpidentity = NULL; | |
f1ec23c0 | 2706 | |
b2b3024e | 2707 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2708 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2709 | *al = SSL_AD_INTERNAL_ERROR; | |
2710 | goto err; | |
2711 | } | |
7689082b | 2712 | |
13c0ec4a | 2713 | ret = 1; |
0bce0b02 | 2714 | |
13c0ec4a MC |
2715 | err: |
2716 | OPENSSL_cleanse(psk, psklen); | |
2717 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2718 | OPENSSL_clear_free(tmppsk, psklen); | |
2719 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2720 | |
13c0ec4a MC |
2721 | return ret; |
2722 | #else | |
05ec6a25 | 2723 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2724 | *al = SSL_AD_INTERNAL_ERROR; |
2725 | return 0; | |
b9908bf9 | 2726 | #endif |
13c0ec4a | 2727 | } |
b9908bf9 | 2728 | |
f1ec23c0 | 2729 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2730 | { |
bc36ee62 | 2731 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2732 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2733 | EVP_PKEY *pkey = NULL; |
2734 | EVP_PKEY_CTX *pctx = NULL; | |
2735 | size_t enclen; | |
2736 | unsigned char *pms = NULL; | |
2737 | size_t pmslen = 0; | |
b9908bf9 | 2738 | |
13c0ec4a MC |
2739 | if (s->session->peer == NULL) { |
2740 | /* | |
2741 | * We should always have a server certificate with SSL_kRSA. | |
2742 | */ | |
05ec6a25 | 2743 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2744 | return 0; |
2745 | } | |
0f113f3e | 2746 | |
13c0ec4a MC |
2747 | pkey = X509_get0_pubkey(s->session->peer); |
2748 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2749 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2750 | return 0; |
2751 | } | |
0f113f3e | 2752 | |
13c0ec4a MC |
2753 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2754 | pms = OPENSSL_malloc(pmslen); | |
2755 | if (pms == NULL) { | |
05ec6a25 | 2756 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2757 | *al = SSL_AD_INTERNAL_ERROR; |
2758 | return 0; | |
2759 | } | |
0bce0b02 | 2760 | |
13c0ec4a MC |
2761 | pms[0] = s->client_version >> 8; |
2762 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2763 | /* TODO(size_t): Convert this function */ |
2764 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2765 | goto err; |
2766 | } | |
0f113f3e | 2767 | |
13c0ec4a | 2768 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2769 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2770 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2771 | goto err; | |
2772 | } | |
13c0ec4a MC |
2773 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2774 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2775 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2776 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2777 | goto err; |
2778 | } | |
f1ec23c0 MC |
2779 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2780 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2781 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2782 | goto err; |
2783 | } | |
13c0ec4a MC |
2784 | EVP_PKEY_CTX_free(pctx); |
2785 | pctx = NULL; | |
0f113f3e | 2786 | |
13c0ec4a | 2787 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2788 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2789 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2790 | goto err; | |
b9908bf9 | 2791 | } |
13c0ec4a MC |
2792 | |
2793 | s->s3->tmp.pms = pms; | |
2794 | s->s3->tmp.pmslen = pmslen; | |
2795 | ||
2faa1b48 CB |
2796 | /* Log the premaster secret, if logging is enabled. */ |
2797 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2798 | goto err; | |
2799 | ||
13c0ec4a MC |
2800 | return 1; |
2801 | err: | |
2802 | OPENSSL_clear_free(pms, pmslen); | |
2803 | EVP_PKEY_CTX_free(pctx); | |
2804 | ||
2805 | return 0; | |
2806 | #else | |
05ec6a25 | 2807 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2808 | *al = SSL_AD_INTERNAL_ERROR; |
2809 | return 0; | |
f9b3bff6 | 2810 | #endif |
13c0ec4a MC |
2811 | } |
2812 | ||
f1ec23c0 | 2813 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2814 | { |
2815 | #ifndef OPENSSL_NO_DH | |
2816 | DH *dh_clnt = NULL; | |
2817 | const BIGNUM *pub_key; | |
2818 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2819 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2820 | |
2821 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2822 | if (skey == NULL) |
2823 | goto err; | |
2824 | ||
0a699a07 | 2825 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2826 | if (ckey == NULL) |
2827 | goto err; | |
2828 | ||
a8c1c704 MC |
2829 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2830 | ||
0f1e51ea | 2831 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2832 | goto err; |
a8c1c704 MC |
2833 | |
2834 | /* send off the data */ | |
2835 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2836 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2837 | goto err; |
2838 | ||
2839 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2840 | EVP_PKEY_free(ckey); |
2841 | ||
2842 | return 1; | |
f1ec23c0 MC |
2843 | err: |
2844 | EVP_PKEY_free(ckey); | |
2845 | #endif | |
05ec6a25 | 2846 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2847 | *al = SSL_AD_INTERNAL_ERROR; |
2848 | return 0; | |
a8c1c704 MC |
2849 | } |
2850 | ||
f1ec23c0 | 2851 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2852 | { |
2853 | #ifndef OPENSSL_NO_EC | |
2854 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2855 | size_t encoded_pt_len = 0; |
67ad5aab | 2856 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2857 | int ret = 0; |
67ad5aab MC |
2858 | |
2859 | skey = s->s3->peer_tmp; | |
ec24630a | 2860 | if (skey == NULL) { |
05ec6a25 | 2861 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2862 | return 0; |
2863 | } | |
2864 | ||
0a699a07 | 2865 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2866 | if (ckey == NULL) { |
2867 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2868 | goto err; | |
2869 | } | |
67ad5aab | 2870 | |
0f1e51ea | 2871 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2872 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2873 | goto err; |
2874 | } | |
2875 | ||
2876 | /* Generate encoding of client key */ | |
ec24630a | 2877 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2878 | |
2879 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2880 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2881 | goto err; |
2882 | } | |
2883 | ||
b2b3024e | 2884 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2885 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2886 | goto err; | |
2887 | } | |
67ad5aab | 2888 | |
f1ec23c0 | 2889 | ret = 1; |
67ad5aab | 2890 | err: |
f1ec23c0 | 2891 | OPENSSL_free(encodedPoint); |
67ad5aab | 2892 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2893 | return ret; |
67ad5aab | 2894 | #else |
05ec6a25 | 2895 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2896 | *al = SSL_AD_INTERNAL_ERROR; |
2897 | return 0; | |
2898 | #endif | |
2899 | } | |
2900 | ||
f1ec23c0 | 2901 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2902 | { |
2903 | #ifndef OPENSSL_NO_GOST | |
2904 | /* GOST key exchange message creation */ | |
2905 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2906 | X509 *peer_cert; | |
2907 | size_t msglen; | |
2908 | unsigned int md_len; | |
2909 | unsigned char shared_ukm[32], tmp[256]; | |
2910 | EVP_MD_CTX *ukm_hash = NULL; | |
2911 | int dgst_nid = NID_id_GostR3411_94; | |
2912 | unsigned char *pms = NULL; | |
2913 | size_t pmslen = 0; | |
2914 | ||
2915 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2916 | dgst_nid = NID_id_GostR3411_2012_256; | |
2917 | ||
2918 | /* | |
2919 | * Get server sertificate PKEY and create ctx from it | |
2920 | */ | |
2921 | peer_cert = s->session->peer; | |
2922 | if (!peer_cert) { | |
2923 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2924 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2925 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2926 | return 0; | |
2927 | } | |
2928 | ||
2929 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2930 | if (pkey_ctx == NULL) { | |
2931 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2932 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2933 | return 0; |
2934 | } | |
2935 | /* | |
2936 | * If we have send a certificate, and certificate key | |
2937 | * parameters match those of server certificate, use | |
2938 | * certificate key for key exchange | |
2939 | */ | |
2940 | ||
2941 | /* Otherwise, generate ephemeral key pair */ | |
2942 | pmslen = 32; | |
2943 | pms = OPENSSL_malloc(pmslen); | |
2944 | if (pms == NULL) { | |
2945 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2946 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2947 | goto err; |
e00e0b3d MC |
2948 | } |
2949 | ||
2950 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2951 | /* Generate session key |
2952 | * TODO(size_t): Convert this function | |
2953 | */ | |
2954 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2955 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2956 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2957 | goto err; |
2958 | }; | |
e00e0b3d MC |
2959 | /* |
2960 | * Compute shared IV and store it in algorithm-specific context | |
2961 | * data | |
2962 | */ | |
2963 | ukm_hash = EVP_MD_CTX_new(); | |
2964 | if (ukm_hash == NULL | |
a230b26e EK |
2965 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2966 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2967 | SSL3_RANDOM_SIZE) <= 0 | |
2968 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2969 | SSL3_RANDOM_SIZE) <= 0 | |
2970 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2971 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2972 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2973 | goto err; |
2974 | } | |
2975 | EVP_MD_CTX_free(ukm_hash); | |
2976 | ukm_hash = NULL; | |
2977 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2978 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2979 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2980 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2981 | goto err; |
2982 | } | |
2983 | /* Make GOST keytransport blob message */ | |
2984 | /* | |
2985 | * Encapsulate it into sequence | |
2986 | */ | |
e00e0b3d MC |
2987 | msglen = 255; |
2988 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2989 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2990 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2991 | goto err; |
2992 | } | |
f1ec23c0 | 2993 | |
08029dfa MC |
2994 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2995 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2996 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2997 | *al = SSL_AD_INTERNAL_ERROR; |
2998 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2999 | goto err; | |
e00e0b3d | 3000 | } |
f1ec23c0 | 3001 | |
e00e0b3d MC |
3002 | EVP_PKEY_CTX_free(pkey_ctx); |
3003 | s->s3->tmp.pms = pms; | |
3004 | s->s3->tmp.pmslen = pmslen; | |
3005 | ||
3006 | return 1; | |
3007 | err: | |
3008 | EVP_PKEY_CTX_free(pkey_ctx); | |
3009 | OPENSSL_clear_free(pms, pmslen); | |
3010 | EVP_MD_CTX_free(ukm_hash); | |
3011 | return 0; | |
3012 | #else | |
05ec6a25 | 3013 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3014 | *al = SSL_AD_INTERNAL_ERROR; |
3015 | return 0; | |
3016 | #endif | |
3017 | } | |
3018 | ||
f1ec23c0 | 3019 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3020 | { |
8b9546c7 | 3021 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3022 | unsigned char *abytes = NULL; |
3023 | ||
3024 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3025 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3026 | &abytes)) { | |
05ec6a25 | 3027 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3028 | return 0; |
3029 | } | |
f1ec23c0 MC |
3030 | BN_bn2bin(s->srp_ctx.A, abytes); |
3031 | ||
840a2bf8 MC |
3032 | OPENSSL_free(s->session->srp_username); |
3033 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3034 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3035 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3036 | return 0; |
3037 | } | |
3038 | ||
3039 | return 1; | |
3040 | #else | |
05ec6a25 | 3041 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3042 | *al = SSL_AD_INTERNAL_ERROR; |
3043 | return 0; | |
3044 | #endif | |
3045 | } | |
3046 | ||
7cea05dc | 3047 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3048 | { |
13c0ec4a MC |
3049 | unsigned long alg_k; |
3050 | int al = -1; | |
3051 | ||
f1ec23c0 | 3052 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3053 | |
13c0ec4a | 3054 | if ((alg_k & SSL_PSK) |
7cea05dc | 3055 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3056 | goto err; |
3057 | ||
f1ec23c0 | 3058 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3059 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3060 | goto err; |
a8c1c704 | 3061 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3062 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3063 | goto err; |
67ad5aab | 3064 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3065 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3066 | goto err; |
e00e0b3d | 3067 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3068 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3069 | goto err; |
840a2bf8 | 3070 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3071 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3072 | goto err; |
4a424545 | 3073 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
3074 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3075 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3076 | goto err; | |
3077 | } | |
3078 | ||
b9908bf9 | 3079 | return 1; |
0f113f3e | 3080 | err: |
13c0ec4a MC |
3081 | if (al != -1) |
3082 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3083 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3084 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3085 | #ifndef OPENSSL_NO_PSK |
3086 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3087 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3088 | #endif |
b9908bf9 MC |
3089 | return 0; |
3090 | } | |
3091 | ||
3092 | int tls_client_key_exchange_post_work(SSL *s) | |
3093 | { | |
3094 | unsigned char *pms = NULL; | |
3095 | size_t pmslen = 0; | |
3096 | ||
6f137370 MC |
3097 | pms = s->s3->tmp.pms; |
3098 | pmslen = s->s3->tmp.pmslen; | |
3099 | ||
b9908bf9 MC |
3100 | #ifndef OPENSSL_NO_SRP |
3101 | /* Check for SRP */ | |
3102 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3103 | if (!srp_generate_client_master_secret(s)) { | |
3104 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3105 | ERR_R_INTERNAL_ERROR); | |
3106 | goto err; | |
3107 | } | |
3108 | return 1; | |
3109 | } | |
3110 | #endif | |
b9908bf9 MC |
3111 | |
3112 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3113 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3114 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3115 | goto err; | |
3116 | } | |
3117 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3118 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3119 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3120 | /* ssl_generate_master_secret frees the pms even on error */ |
3121 | pms = NULL; | |
3122 | pmslen = 0; | |
b9908bf9 MC |
3123 | goto err; |
3124 | } | |
6f137370 MC |
3125 | pms = NULL; |
3126 | pmslen = 0; | |
473483d4 MC |
3127 | |
3128 | #ifndef OPENSSL_NO_SCTP | |
3129 | if (SSL_IS_DTLS(s)) { | |
3130 | unsigned char sctpauthkey[64]; | |
3131 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3132 | ||
3133 | /* | |
3134 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3135 | * used. | |
3136 | */ | |
141eb8c6 MC |
3137 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3138 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3139 | |
3140 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3141 | sizeof(sctpauthkey), labelbuffer, |
3142 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3143 | goto err; |
3144 | ||
3145 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3146 | sizeof(sctpauthkey), sctpauthkey); | |
3147 | } | |
3148 | #endif | |
3149 | ||
b9908bf9 MC |
3150 | return 1; |
3151 | err: | |
3152 | OPENSSL_clear_free(pms, pmslen); | |
3153 | s->s3->tmp.pms = NULL; | |
3154 | return 0; | |
0f113f3e | 3155 | } |
d02b48c6 | 3156 | |
0f113f3e MC |
3157 | /* |
3158 | * Check a certificate can be used for client authentication. Currently check | |
3159 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3160 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3161 | */ |
3162 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3163 | { |
0f113f3e | 3164 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3165 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3166 | return 0; |
3167 | /* | |
3168 | * If strict mode check suitability of chain before using it. This also | |
3169 | * adjusts suite B digest if necessary. | |
3170 | */ | |
3171 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3172 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3173 | return 0; | |
0f113f3e MC |
3174 | return 1; |
3175 | } | |
0d609395 | 3176 | |
be3583fa | 3177 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3178 | { |
3179 | X509 *x509 = NULL; | |
3180 | EVP_PKEY *pkey = NULL; | |
3181 | int i; | |
3182 | ||
b9908bf9 | 3183 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3184 | /* Let cert callback update client certificates if required */ |
3185 | if (s->cert->cert_cb) { | |
3186 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3187 | if (i < 0) { | |
3188 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3189 | return WORK_MORE_A; |
0f113f3e MC |
3190 | } |
3191 | if (i == 0) { | |
3192 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3193 | ossl_statem_set_error(s); |
0f113f3e MC |
3194 | return 0; |
3195 | } | |
3196 | s->rwstate = SSL_NOTHING; | |
3197 | } | |
3198 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3199 | return WORK_FINISHED_CONTINUE; |
3200 | ||
3201 | /* Fall through to WORK_MORE_B */ | |
3202 | wst = WORK_MORE_B; | |
0f113f3e MC |
3203 | } |
3204 | ||
3205 | /* We need to get a client cert */ | |
b9908bf9 | 3206 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3207 | /* |
3208 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3209 | * return(-1); We then get retied later | |
3210 | */ | |
0f113f3e MC |
3211 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3212 | if (i < 0) { | |
3213 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3214 | return WORK_MORE_B; |
0f113f3e MC |
3215 | } |
3216 | s->rwstate = SSL_NOTHING; | |
3217 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3218 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3219 | i = 0; | |
3220 | } else if (i == 1) { | |
3221 | i = 0; | |
b9908bf9 | 3222 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3223 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3224 | } | |
3225 | ||
222561fe | 3226 | X509_free(x509); |
25aaa98a | 3227 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3228 | if (i && !ssl3_check_client_certificate(s)) |
3229 | i = 0; | |
3230 | if (i == 0) { | |
3231 | if (s->version == SSL3_VERSION) { | |
3232 | s->s3->tmp.cert_req = 0; | |
3233 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3234 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3235 | } else { |
3236 | s->s3->tmp.cert_req = 2; | |
124037fd | 3237 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3238 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3239 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3240 | return 0; |
3241 | } | |
0f113f3e MC |
3242 | } |
3243 | } | |
3244 | ||
b9908bf9 | 3245 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3246 | } |
3247 | ||
b9908bf9 MC |
3248 | /* Shouldn't ever get here */ |
3249 | return WORK_ERROR; | |
3250 | } | |
3251 | ||
7cea05dc | 3252 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3253 | { |
0baed5e9 | 3254 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3255 | |
3256 | /* | |
3257 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3258 | * later | |
3259 | */ | |
3260 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3261 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3262 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3263 | : s->cert->key, |
3264 | &al)) { | |
b9908bf9 | 3265 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3266 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3267 | return 0; |
0f113f3e | 3268 | } |
b9908bf9 MC |
3269 | |
3270 | return 1; | |
0f113f3e MC |
3271 | } |
3272 | ||
3273 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3274 | |
36d16f8e | 3275 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3276 | { |
60f43e9e RL |
3277 | int i; |
3278 | #ifndef OPENSSL_NO_EC | |
3279 | int idx; | |
3280 | #endif | |
0f113f3e MC |
3281 | long alg_k, alg_a; |
3282 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3283 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3284 | |
0f113f3e MC |
3285 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3286 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3287 | |
0f113f3e | 3288 | /* we don't have a certificate */ |
55a9a16f | 3289 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3290 | return (1); |
d02b48c6 | 3291 | |
0f113f3e | 3292 | /* This is the passed certificate */ |
d02b48c6 | 3293 | |
10bf4fc2 | 3294 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3295 | idx = s->session->peer_type; |
0f113f3e | 3296 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3297 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3298 | /* check failed */ |
3299 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3300 | goto f_err; | |
3301 | } else { | |
3302 | return 1; | |
3303 | } | |
3304 | } else if (alg_a & SSL_aECDSA) { | |
3305 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3306 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3307 | goto f_err; | |
0f113f3e MC |
3308 | } |
3309 | #endif | |
8382fd3a | 3310 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3311 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3312 | |
3313 | /* Check that we have a certificate if we require one */ | |
3314 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3315 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3316 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3317 | goto f_err; | |
3318 | } | |
bc36ee62 | 3319 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3320 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3321 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3322 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3323 | goto f_err; | |
3324 | } | |
d02b48c6 | 3325 | #endif |
bc36ee62 | 3326 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3327 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3328 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3329 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3330 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3331 | goto f_err; | |
0f113f3e | 3332 | } |
79df9d62 | 3333 | #endif |
bc36ee62 | 3334 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3335 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3336 | al = SSL_AD_INTERNAL_ERROR; |
3337 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3338 | goto f_err; |
0f113f3e | 3339 | } |
d02b48c6 RE |
3340 | #endif |
3341 | ||
0f113f3e MC |
3342 | return (1); |
3343 | f_err: | |
26c79d56 | 3344 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3345 | return (0); |
3346 | } | |
3347 | ||
e481f9b9 | 3348 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3349 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3350 | { |
15e6be6c MC |
3351 | size_t len, padding_len; |
3352 | unsigned char *padding = NULL; | |
15e6be6c | 3353 | |
aff8c126 | 3354 | len = s->ext.npn_len; |
b9908bf9 | 3355 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3356 | |
aff8c126 | 3357 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3358 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3359 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3360 | goto err; | |
3361 | } | |
3362 | ||
3363 | memset(padding, 0, padding_len); | |
3364 | ||
b9908bf9 | 3365 | return 1; |
15e6be6c | 3366 | err: |
15e6be6c MC |
3367 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3368 | return 0; | |
b9908bf9 | 3369 | } |
6434abbf | 3370 | #endif |
368888bc | 3371 | |
c7f47786 MC |
3372 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3373 | { | |
3374 | if (PACKET_remaining(pkt) > 0) { | |
3375 | /* should contain no data */ | |
3376 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3377 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3378 | ossl_statem_set_error(s); | |
3379 | return MSG_PROCESS_ERROR; | |
3380 | } | |
3381 | ||
3382 | /* | |
1f04f23e MC |
3383 | * This is a historical discrepancy (not in the RFC) maintained for |
3384 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3385 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3386 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3387 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3388 | */ |
3389 | if (SSL_IS_DTLS(s)) | |
3390 | SSL_renegotiate(s); | |
3391 | else | |
3392 | SSL_renegotiate_abbreviated(s); | |
3393 | ||
3394 | return MSG_PROCESS_FINISHED_READING; | |
3395 | } | |
3396 | ||
e46f2334 MC |
3397 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3398 | { | |
3399 | int al = SSL_AD_INTERNAL_ERROR; | |
3400 | PACKET extensions; | |
3434f40b | 3401 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3402 | |
e46f2334 MC |
3403 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3404 | al = SSL_AD_DECODE_ERROR; | |
3405 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3406 | goto err; | |
3407 | } | |
3408 | ||
e96e0f8e | 3409 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
fc5ece2e | 3410 | &rawexts, &al, NULL) |
e96e0f8e | 3411 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3412 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3413 | goto err; |
3414 | ||
1b0286a3 | 3415 | OPENSSL_free(rawexts); |
e46f2334 MC |
3416 | return MSG_PROCESS_CONTINUE_READING; |
3417 | ||
3418 | err: | |
3419 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3420 | ossl_statem_set_error(s); | |
1b0286a3 | 3421 | OPENSSL_free(rawexts); |
e46f2334 MC |
3422 | return MSG_PROCESS_ERROR; |
3423 | } | |
3424 | ||
368888bc | 3425 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3426 | { |
3427 | int i = 0; | |
368888bc | 3428 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3429 | if (s->ctx->client_cert_engine) { |
3430 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3431 | SSL_get_client_CA_list(s), | |
3432 | px509, ppkey, NULL, NULL, NULL); | |
3433 | if (i != 0) | |
3434 | return i; | |
3435 | } | |
3436 | #endif | |
3437 | if (s->ctx->client_cert_cb) | |
3438 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3439 | return i; | |
3440 | } | |
d45ba43d | 3441 | |
ae2f7b37 | 3442 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3443 | { |
2c7b4dbc MC |
3444 | int i; |
3445 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3446 | int empty_reneg_info_scsv = !s->renegotiate; |
3447 | /* Set disabled masks for this session */ | |
3448 | ssl_set_client_disabled(s); | |
3449 | ||
3450 | if (sk == NULL) | |
3451 | return (0); | |
d45ba43d | 3452 | |
2c7b4dbc MC |
3453 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3454 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3455 | # error Max cipher length too short | |
3456 | # endif | |
3457 | /* | |
3458 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3459 | * chop number of supported ciphers to keep it well below this if we | |
3460 | * use TLS v1.2 | |
3461 | */ | |
3462 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3463 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3464 | else | |
3465 | #endif | |
3466 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3467 | maxlen = 0xfffe; | |
3468 | ||
3469 | if (empty_reneg_info_scsv) | |
3470 | maxlen -= 2; | |
3471 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3472 | maxlen -= 2; | |
3473 | ||
3474 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3475 | const SSL_CIPHER *c; | |
3476 | ||
d45ba43d MC |
3477 | c = sk_SSL_CIPHER_value(sk, i); |
3478 | /* Skip disabled ciphers */ | |
3479 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3480 | continue; | |
2c7b4dbc MC |
3481 | |
3482 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3483 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3484 | return 0; | |
3485 | } | |
3486 | ||
3487 | totlen += len; | |
d45ba43d | 3488 | } |
2c7b4dbc MC |
3489 | |
3490 | if (totlen == 0) { | |
3491 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3492 | return 0; | |
3493 | } | |
3494 | ||
3495 | if (totlen != 0) { | |
d45ba43d MC |
3496 | if (empty_reneg_info_scsv) { |
3497 | static SSL_CIPHER scsv = { | |
3498 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3499 | }; | |
2c7b4dbc MC |
3500 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3501 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3502 | return 0; | |
3503 | } | |
d45ba43d MC |
3504 | } |
3505 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3506 | static SSL_CIPHER scsv = { | |
3507 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3508 | }; | |
2c7b4dbc MC |
3509 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3510 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3511 | return 0; | |
3512 | } | |
d45ba43d MC |
3513 | } |
3514 | } | |
3515 | ||
2c7b4dbc | 3516 | return 1; |
d45ba43d | 3517 | } |