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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 | |
e46f2334 MC |
63 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
64 | ||
7ab09630 | 65 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 66 | static int key_exchange_expected(SSL *s); |
0f113f3e | 67 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 68 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 69 | WPACKET *pkt); |
ea262260 | 70 | |
61ae935a MC |
71 | /* |
72 | * Is a CertificateRequest message allowed at the moment or not? | |
73 | * | |
74 | * Return values are: | |
75 | * 1: Yes | |
76 | * 0: No | |
77 | */ | |
7ab09630 | 78 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
79 | { |
80 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 81 | if ((s->version > SSL3_VERSION |
a230b26e EK |
82 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
83 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
84 | return 0; |
85 | ||
86 | return 1; | |
87 | } | |
88 | ||
89 | /* | |
a455d0f6 | 90 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
91 | * |
92 | * Return values are: | |
93 | * 1: Yes | |
94 | * 0: No | |
95 | */ | |
a455d0f6 | 96 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
97 | { |
98 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
99 | ||
100 | /* | |
101 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 102 | * ciphersuite or for SRP |
61ae935a | 103 | */ |
a455d0f6 MC |
104 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
105 | | SSL_kSRP)) { | |
106 | return 1; | |
61ae935a MC |
107 | } |
108 | ||
a455d0f6 | 109 | return 0; |
61ae935a MC |
110 | } |
111 | ||
0f1e51ea MC |
112 | /* |
113 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
114 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
115 | * server. The message type that the server has sent is provided in |mt|. The | |
116 | * current state is in |s->statem.hand_state|. | |
117 | * | |
94ed2c67 MC |
118 | * Return values are 1 for success (transition allowed) and 0 on error |
119 | * (transition not allowed) | |
0f1e51ea MC |
120 | */ |
121 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
122 | { | |
123 | OSSL_STATEM *st = &s->statem; | |
124 | ||
94ed2c67 MC |
125 | /* |
126 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
127 | * we will update this to look more like real TLSv1.3 | |
128 | */ | |
129 | ||
0f1e51ea MC |
130 | /* |
131 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
132 | * yet negotiated TLSv1.3 at that point so that is handled by | |
133 | * ossl_statem_client_read_transition() | |
134 | */ | |
135 | ||
136 | switch (st->hand_state) { | |
137 | default: | |
138 | break; | |
139 | ||
140 | case TLS_ST_CR_SRVR_HELLO: | |
e46f2334 MC |
141 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
142 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
143 | return 1; | |
144 | } | |
145 | break; | |
146 | ||
147 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 148 | if (s->hit) { |
92760c21 MC |
149 | if (mt == SSL3_MT_FINISHED) { |
150 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
151 | return 1; |
152 | } | |
153 | } else { | |
92760c21 MC |
154 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
155 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
156 | return 1; | |
f5ca0b04 MC |
157 | } |
158 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
159 | st->hand_state = TLS_ST_CR_CERT; |
160 | return 1; | |
161 | } | |
162 | } | |
163 | break; | |
164 | ||
92760c21 MC |
165 | case TLS_ST_CR_CERT_REQ: |
166 | if (mt == SSL3_MT_CERTIFICATE) { | |
167 | st->hand_state = TLS_ST_CR_CERT; | |
168 | return 1; | |
169 | } | |
170 | break; | |
171 | ||
0f1e51ea | 172 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
173 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
174 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
175 | return 1; | |
176 | } | |
177 | break; | |
178 | ||
179 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
180 | if (mt == SSL3_MT_FINISHED) { |
181 | st->hand_state = TLS_ST_CR_FINISHED; | |
182 | return 1; | |
183 | } | |
184 | break; | |
cc2455bf MC |
185 | |
186 | case TLS_ST_OK: | |
187 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
188 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
189 | return 1; | |
190 | } | |
191 | break; | |
0f1e51ea MC |
192 | } |
193 | ||
0f1e51ea | 194 | /* No valid transition found */ |
0f1e51ea MC |
195 | return 0; |
196 | } | |
197 | ||
61ae935a | 198 | /* |
8481f583 MC |
199 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
200 | * handshake state transitions when the client is reading messages from the | |
201 | * server. The message type that the server has sent is provided in |mt|. The | |
202 | * current state is in |s->statem.hand_state|. | |
61ae935a | 203 | * |
94ed2c67 MC |
204 | * Return values are 1 for success (transition allowed) and 0 on error |
205 | * (transition not allowed) | |
61ae935a | 206 | */ |
8481f583 | 207 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 208 | { |
d6f1a6e9 | 209 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 210 | int ske_expected; |
61ae935a | 211 | |
0f1e51ea MC |
212 | /* |
213 | * Note that after a ClientHello we don't know what version we are going | |
214 | * to negotiate yet, so we don't take this branch until later | |
215 | */ | |
f5ca0b04 | 216 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
217 | if (!ossl_statem_client13_read_transition(s, mt)) |
218 | goto err; | |
219 | return 1; | |
220 | } | |
0f1e51ea | 221 | |
a230b26e | 222 | switch (st->hand_state) { |
f3b3d7f0 RS |
223 | default: |
224 | break; | |
225 | ||
61ae935a MC |
226 | case TLS_ST_CW_CLNT_HELLO: |
227 | if (mt == SSL3_MT_SERVER_HELLO) { | |
228 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
229 | return 1; | |
230 | } | |
231 | ||
232 | if (SSL_IS_DTLS(s)) { | |
233 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
234 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
235 | return 1; | |
236 | } | |
237 | } | |
238 | break; | |
239 | ||
240 | case TLS_ST_CR_SRVR_HELLO: | |
241 | if (s->hit) { | |
aff8c126 | 242 | if (s->ext.ticket_expected) { |
61ae935a MC |
243 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
244 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
245 | return 1; | |
246 | } | |
247 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
248 | st->hand_state = TLS_ST_CR_CHANGE; | |
249 | return 1; | |
250 | } | |
251 | } else { | |
252 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
253 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
254 | return 1; | |
ad3819c2 | 255 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
256 | && s->ext.session_secret_cb != NULL |
257 | && s->session->ext.tick != NULL | |
a230b26e | 258 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
259 | /* |
260 | * Normally, we can tell if the server is resuming the session | |
261 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
262 | * the next server message after the ServerHello to determine if | |
263 | * the server is resuming. | |
264 | */ | |
265 | s->hit = 1; | |
266 | st->hand_state = TLS_ST_CR_CHANGE; | |
267 | return 1; | |
61ae935a | 268 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 269 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
270 | if (mt == SSL3_MT_CERTIFICATE) { |
271 | st->hand_state = TLS_ST_CR_CERT; | |
272 | return 1; | |
273 | } | |
274 | } else { | |
a455d0f6 | 275 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
276 | /* SKE is optional for some PSK ciphersuites */ |
277 | if (ske_expected | |
a230b26e EK |
278 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
279 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
280 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
281 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
282 | return 1; | |
283 | } | |
284 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
285 | && cert_req_allowed(s)) { |
286 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
287 | return 1; | |
a455d0f6 | 288 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
289 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
290 | return 1; | |
61ae935a MC |
291 | } |
292 | } | |
293 | } | |
294 | break; | |
295 | ||
296 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
297 | /* |
298 | * The CertificateStatus message is optional even if | |
aff8c126 | 299 | * |ext.status_expected| is set |
bb1aaab4 | 300 | */ |
aff8c126 | 301 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
302 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
303 | return 1; | |
a455d0f6 MC |
304 | } |
305 | /* Fall through */ | |
306 | ||
307 | case TLS_ST_CR_CERT_STATUS: | |
308 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 309 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
310 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
311 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
312 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
313 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
314 | return 1; | |
61ae935a | 315 | } |
672f3337 | 316 | goto err; |
61ae935a | 317 | } |
a455d0f6 | 318 | /* Fall through */ |
61ae935a | 319 | |
a455d0f6 MC |
320 | case TLS_ST_CR_KEY_EXCH: |
321 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
322 | if (cert_req_allowed(s)) { | |
61ae935a MC |
323 | st->hand_state = TLS_ST_CR_CERT_REQ; |
324 | return 1; | |
61ae935a | 325 | } |
672f3337 | 326 | goto err; |
61ae935a | 327 | } |
a455d0f6 | 328 | /* Fall through */ |
61ae935a MC |
329 | |
330 | case TLS_ST_CR_CERT_REQ: | |
331 | if (mt == SSL3_MT_SERVER_DONE) { | |
332 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
333 | return 1; | |
334 | } | |
335 | break; | |
336 | ||
337 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 338 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
339 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
340 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
341 | return 1; | |
342 | } | |
61ae935a MC |
343 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
344 | st->hand_state = TLS_ST_CR_CHANGE; | |
345 | return 1; | |
346 | } | |
347 | break; | |
348 | ||
349 | case TLS_ST_CR_SESSION_TICKET: | |
350 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
351 | st->hand_state = TLS_ST_CR_CHANGE; | |
352 | return 1; | |
353 | } | |
354 | break; | |
355 | ||
356 | case TLS_ST_CR_CHANGE: | |
357 | if (mt == SSL3_MT_FINISHED) { | |
358 | st->hand_state = TLS_ST_CR_FINISHED; | |
359 | return 1; | |
360 | } | |
361 | break; | |
c7f47786 MC |
362 | |
363 | case TLS_ST_OK: | |
364 | if (mt == SSL3_MT_HELLO_REQUEST) { | |
365 | st->hand_state = TLS_ST_CR_HELLO_REQ; | |
366 | return 1; | |
367 | } | |
368 | break; | |
61ae935a MC |
369 | } |
370 | ||
672f3337 | 371 | err: |
61ae935a | 372 | /* No valid transition found */ |
672f3337 | 373 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 374 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
375 | return 0; |
376 | } | |
377 | ||
378 | /* | |
0f1e51ea MC |
379 | * ossl_statem_client13_write_transition() works out what handshake state to |
380 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
381 | * server. | |
0f1e51ea MC |
382 | */ |
383 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
384 | { | |
385 | OSSL_STATEM *st = &s->statem; | |
386 | ||
94ed2c67 MC |
387 | /* |
388 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
389 | * we will update this to look more like real TLSv1.3 | |
390 | */ | |
391 | ||
0f1e51ea MC |
392 | /* |
393 | * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO, | |
394 | * because we haven't negotiated TLSv1.3 yet at that point. They are | |
395 | * handled by ossl_statem_client_write_transition(). | |
396 | */ | |
397 | switch (st->hand_state) { | |
398 | default: | |
399 | /* Shouldn't happen */ | |
400 | return WRITE_TRAN_ERROR; | |
401 | ||
92760c21 | 402 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 403 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 404 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
405 | return WRITE_TRAN_CONTINUE; |
406 | ||
407 | case TLS_ST_CW_CERT: | |
408 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 409 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 410 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
411 | return WRITE_TRAN_CONTINUE; |
412 | ||
413 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
414 | st->hand_state = TLS_ST_CW_FINISHED; |
415 | return WRITE_TRAN_CONTINUE; | |
416 | ||
cc2455bf | 417 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 418 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
419 | st->hand_state = TLS_ST_OK; |
420 | ossl_statem_set_in_init(s, 0); | |
421 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
422 | |
423 | case TLS_ST_OK: | |
424 | /* Just go straight to trying to read from the server */ | |
425 | return WRITE_TRAN_FINISHED; | |
0f1e51ea MC |
426 | } |
427 | } | |
428 | ||
429 | /* | |
430 | * ossl_statem_client_write_transition() works out what handshake state to | |
431 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 432 | */ |
8481f583 | 433 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 434 | { |
d6f1a6e9 | 435 | OSSL_STATEM *st = &s->statem; |
61ae935a | 436 | |
0f1e51ea MC |
437 | /* |
438 | * Note that immediately before/after a ClientHello we don't know what | |
439 | * version we are going to negotiate yet, so we don't take this branch until | |
440 | * later | |
441 | */ | |
f5ca0b04 | 442 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
443 | return ossl_statem_client13_write_transition(s); |
444 | ||
a230b26e | 445 | switch (st->hand_state) { |
f3b3d7f0 RS |
446 | default: |
447 | /* Shouldn't happen */ | |
448 | return WRITE_TRAN_ERROR; | |
449 | ||
a230b26e | 450 | case TLS_ST_OK: |
c7f47786 MC |
451 | if (!s->renegotiate) { |
452 | /* | |
453 | * We haven't requested a renegotiation ourselves so we must have | |
454 | * received a message from the server. Better read it. | |
455 | */ | |
456 | return WRITE_TRAN_FINISHED; | |
457 | } | |
a230b26e EK |
458 | /* Renegotiation - fall through */ |
459 | case TLS_ST_BEFORE: | |
460 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
461 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 462 | |
a230b26e EK |
463 | case TLS_ST_CW_CLNT_HELLO: |
464 | /* | |
465 | * No transition at the end of writing because we don't know what | |
466 | * we will be sent | |
467 | */ | |
468 | return WRITE_TRAN_FINISHED; | |
61ae935a | 469 | |
a230b26e EK |
470 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
471 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
472 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 473 | |
a230b26e EK |
474 | case TLS_ST_CR_SRVR_DONE: |
475 | if (s->s3->tmp.cert_req) | |
476 | st->hand_state = TLS_ST_CW_CERT; | |
477 | else | |
61ae935a | 478 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 479 | return WRITE_TRAN_CONTINUE; |
61ae935a | 480 | |
a230b26e EK |
481 | case TLS_ST_CW_CERT: |
482 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
483 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 484 | |
a230b26e EK |
485 | case TLS_ST_CW_KEY_EXCH: |
486 | /* | |
487 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
488 | * sent, but no verify packet is sent | |
489 | */ | |
490 | /* | |
491 | * XXX: For now, we do not support client authentication in ECDH | |
492 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
493 | * need to skip the certificate verify message when client's | |
494 | * ECDH public key is sent inside the client certificate. | |
495 | */ | |
496 | if (s->s3->tmp.cert_req == 1) { | |
497 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
498 | } else { | |
61ae935a | 499 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
500 | } |
501 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
502 | st->hand_state = TLS_ST_CW_CHANGE; | |
503 | } | |
504 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 505 | |
a230b26e EK |
506 | case TLS_ST_CW_CERT_VRFY: |
507 | st->hand_state = TLS_ST_CW_CHANGE; | |
508 | return WRITE_TRAN_CONTINUE; | |
509 | ||
510 | case TLS_ST_CW_CHANGE: | |
61ae935a | 511 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 512 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 513 | #else |
aff8c126 | 514 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
515 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
516 | else | |
517 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 518 | #endif |
a230b26e | 519 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
520 | |
521 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
522 | case TLS_ST_CW_NEXT_PROTO: |
523 | st->hand_state = TLS_ST_CW_FINISHED; | |
524 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
525 | #endif |
526 | ||
a230b26e EK |
527 | case TLS_ST_CW_FINISHED: |
528 | if (s->hit) { | |
529 | st->hand_state = TLS_ST_OK; | |
530 | ossl_statem_set_in_init(s, 0); | |
531 | return WRITE_TRAN_CONTINUE; | |
532 | } else { | |
533 | return WRITE_TRAN_FINISHED; | |
534 | } | |
61ae935a | 535 | |
a230b26e EK |
536 | case TLS_ST_CR_FINISHED: |
537 | if (s->hit) { | |
538 | st->hand_state = TLS_ST_CW_CHANGE; | |
539 | return WRITE_TRAN_CONTINUE; | |
540 | } else { | |
541 | st->hand_state = TLS_ST_OK; | |
542 | ossl_statem_set_in_init(s, 0); | |
543 | return WRITE_TRAN_CONTINUE; | |
544 | } | |
c7f47786 MC |
545 | |
546 | case TLS_ST_CR_HELLO_REQ: | |
547 | /* | |
548 | * If we can renegotiate now then do so, otherwise wait for a more | |
549 | * convenient time. | |
550 | */ | |
551 | if (ssl3_renegotiate_check(s, 1)) { | |
552 | if (!tls_setup_handshake(s)) { | |
553 | ossl_statem_set_error(s); | |
554 | return WRITE_TRAN_ERROR; | |
555 | } | |
556 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
557 | return WRITE_TRAN_CONTINUE; | |
558 | } | |
559 | st->hand_state = TLS_ST_OK; | |
560 | ossl_statem_set_in_init(s, 0); | |
561 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
562 | } |
563 | } | |
564 | ||
565 | /* | |
566 | * Perform any pre work that needs to be done prior to sending a message from | |
567 | * the client to the server. | |
568 | */ | |
8481f583 | 569 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 570 | { |
d6f1a6e9 | 571 | OSSL_STATEM *st = &s->statem; |
61ae935a | 572 | |
a230b26e | 573 | switch (st->hand_state) { |
f3b3d7f0 RS |
574 | default: |
575 | /* No pre work to be done */ | |
576 | break; | |
577 | ||
61ae935a MC |
578 | case TLS_ST_CW_CLNT_HELLO: |
579 | s->shutdown = 0; | |
580 | if (SSL_IS_DTLS(s)) { | |
581 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
582 | if (!ssl3_init_finished_mac(s)) { |
583 | ossl_statem_set_error(s); | |
584 | return WORK_ERROR; | |
585 | } | |
61ae935a MC |
586 | } |
587 | break; | |
588 | ||
61ae935a MC |
589 | case TLS_ST_CW_CHANGE: |
590 | if (SSL_IS_DTLS(s)) { | |
591 | if (s->hit) { | |
592 | /* | |
593 | * We're into the last flight so we don't retransmit these | |
594 | * messages unless we need to. | |
595 | */ | |
596 | st->use_timer = 0; | |
597 | } | |
598 | #ifndef OPENSSL_NO_SCTP | |
599 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
600 | return dtls_wait_for_dry(s); | |
601 | #endif | |
602 | } | |
f3b3d7f0 | 603 | break; |
61ae935a MC |
604 | |
605 | case TLS_ST_OK: | |
30f05b19 | 606 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
607 | } |
608 | ||
609 | return WORK_FINISHED_CONTINUE; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Perform any work that needs to be done after sending a message from the | |
614 | * client to the server. | |
2c5dfdc3 MC |
615 | case TLS_ST_SR_CERT_VRFY: |
616 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 617 | */ |
8481f583 | 618 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 619 | { |
d6f1a6e9 | 620 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
621 | |
622 | s->init_num = 0; | |
623 | ||
a230b26e | 624 | switch (st->hand_state) { |
f3b3d7f0 RS |
625 | default: |
626 | /* No post work to be done */ | |
627 | break; | |
628 | ||
61ae935a | 629 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 630 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 631 | return WORK_MORE_A; |
46417569 | 632 | |
61ae935a MC |
633 | if (SSL_IS_DTLS(s)) { |
634 | /* Treat the next message as the first packet */ | |
635 | s->first_packet = 1; | |
636 | } | |
637 | break; | |
638 | ||
639 | case TLS_ST_CW_KEY_EXCH: | |
640 | if (tls_client_key_exchange_post_work(s) == 0) | |
641 | return WORK_ERROR; | |
642 | break; | |
643 | ||
644 | case TLS_ST_CW_CHANGE: | |
645 | s->session->cipher = s->s3->tmp.new_cipher; | |
646 | #ifdef OPENSSL_NO_COMP | |
647 | s->session->compress_meth = 0; | |
648 | #else | |
649 | if (s->s3->tmp.new_compression == NULL) | |
650 | s->session->compress_meth = 0; | |
651 | else | |
652 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
653 | #endif | |
654 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
655 | return WORK_ERROR; | |
656 | ||
657 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
658 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
659 | return WORK_ERROR; | |
660 | ||
661 | if (SSL_IS_DTLS(s)) { | |
662 | #ifndef OPENSSL_NO_SCTP | |
663 | if (s->hit) { | |
664 | /* | |
665 | * Change to new shared key of SCTP-Auth, will be ignored if | |
666 | * no SCTP used. | |
667 | */ | |
668 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
669 | 0, NULL); | |
670 | } | |
671 | #endif | |
672 | ||
673 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
674 | } | |
675 | break; | |
676 | ||
677 | case TLS_ST_CW_FINISHED: | |
678 | #ifndef OPENSSL_NO_SCTP | |
679 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
680 | /* | |
681 | * Change to new shared key of SCTP-Auth, will be ignored if | |
682 | * no SCTP used. | |
683 | */ | |
684 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
685 | 0, NULL); | |
686 | } | |
687 | #endif | |
688 | if (statem_flush(s) != 1) | |
689 | return WORK_MORE_B; | |
92760c21 MC |
690 | |
691 | if (SSL_IS_TLS13(s)) { | |
692 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
693 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
694 | return WORK_ERROR; | |
695 | } | |
61ae935a | 696 | break; |
61ae935a MC |
697 | } |
698 | ||
699 | return WORK_FINISHED_CONTINUE; | |
700 | } | |
701 | ||
702 | /* | |
6392fb8e MC |
703 | * Get the message construction function and message type for sending from the |
704 | * client | |
61ae935a MC |
705 | * |
706 | * Valid return values are: | |
707 | * 1: Success | |
708 | * 0: Error | |
709 | */ | |
6392fb8e | 710 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 711 | confunc_f *confunc, int *mt) |
61ae935a | 712 | { |
d6f1a6e9 | 713 | OSSL_STATEM *st = &s->statem; |
61ae935a | 714 | |
4a01c59f MC |
715 | switch (st->hand_state) { |
716 | default: | |
717 | /* Shouldn't happen */ | |
718 | return 0; | |
719 | ||
720 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 721 | if (SSL_IS_DTLS(s)) |
6392fb8e | 722 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 723 | else |
6392fb8e MC |
724 | *confunc = tls_construct_change_cipher_spec; |
725 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
726 | break; |
727 | ||
728 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
729 | *confunc = tls_construct_client_hello; |
730 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
731 | break; |
732 | ||
733 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
734 | *confunc = tls_construct_client_certificate; |
735 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
736 | break; |
737 | ||
738 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
739 | *confunc = tls_construct_client_key_exchange; |
740 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
741 | break; |
742 | ||
743 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 744 | *confunc = tls_construct_cert_verify; |
6392fb8e | 745 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 746 | break; |
61ae935a MC |
747 | |
748 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 749 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
750 | *confunc = tls_construct_next_proto; |
751 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 752 | break; |
61ae935a | 753 | #endif |
4a01c59f | 754 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
755 | *confunc = tls_construct_finished; |
756 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
757 | break; |
758 | } | |
5923ad4b | 759 | |
5923ad4b | 760 | return 1; |
61ae935a MC |
761 | } |
762 | ||
763 | /* | |
764 | * Returns the maximum allowed length for the current message that we are | |
765 | * reading. Excludes the message header. | |
766 | */ | |
eda75751 | 767 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 768 | { |
d6f1a6e9 | 769 | OSSL_STATEM *st = &s->statem; |
61ae935a | 770 | |
a230b26e | 771 | switch (st->hand_state) { |
f3b3d7f0 RS |
772 | default: |
773 | /* Shouldn't happen */ | |
774 | return 0; | |
775 | ||
a230b26e EK |
776 | case TLS_ST_CR_SRVR_HELLO: |
777 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 778 | |
a230b26e EK |
779 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
780 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 781 | |
a230b26e EK |
782 | case TLS_ST_CR_CERT: |
783 | return s->max_cert_list; | |
61ae935a | 784 | |
2c5dfdc3 MC |
785 | case TLS_ST_CR_CERT_VRFY: |
786 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
787 | ||
a230b26e EK |
788 | case TLS_ST_CR_CERT_STATUS: |
789 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 790 | |
a230b26e EK |
791 | case TLS_ST_CR_KEY_EXCH: |
792 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 793 | |
a230b26e EK |
794 | case TLS_ST_CR_CERT_REQ: |
795 | /* | |
796 | * Set to s->max_cert_list for compatibility with previous releases. In | |
797 | * practice these messages can get quite long if servers are configured | |
798 | * to provide a long list of acceptable CAs | |
799 | */ | |
800 | return s->max_cert_list; | |
61ae935a | 801 | |
a230b26e EK |
802 | case TLS_ST_CR_SRVR_DONE: |
803 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 804 | |
a230b26e EK |
805 | case TLS_ST_CR_CHANGE: |
806 | if (s->version == DTLS1_BAD_VER) | |
807 | return 3; | |
808 | return CCS_MAX_LENGTH; | |
61ae935a | 809 | |
a230b26e EK |
810 | case TLS_ST_CR_SESSION_TICKET: |
811 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 812 | |
a230b26e EK |
813 | case TLS_ST_CR_FINISHED: |
814 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
815 | |
816 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
817 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
61ae935a | 818 | } |
61ae935a MC |
819 | } |
820 | ||
821 | /* | |
822 | * Process a message that the client has been received from the server. | |
823 | */ | |
8481f583 | 824 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 825 | { |
d6f1a6e9 | 826 | OSSL_STATEM *st = &s->statem; |
61ae935a | 827 | |
a230b26e | 828 | switch (st->hand_state) { |
f3b3d7f0 RS |
829 | default: |
830 | /* Shouldn't happen */ | |
831 | return MSG_PROCESS_ERROR; | |
832 | ||
a230b26e EK |
833 | case TLS_ST_CR_SRVR_HELLO: |
834 | return tls_process_server_hello(s, pkt); | |
61ae935a | 835 | |
a230b26e EK |
836 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
837 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 838 | |
a230b26e EK |
839 | case TLS_ST_CR_CERT: |
840 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 841 | |
2c5dfdc3 MC |
842 | case TLS_ST_CR_CERT_VRFY: |
843 | return tls_process_cert_verify(s, pkt); | |
844 | ||
a230b26e EK |
845 | case TLS_ST_CR_CERT_STATUS: |
846 | return tls_process_cert_status(s, pkt); | |
61ae935a | 847 | |
a230b26e EK |
848 | case TLS_ST_CR_KEY_EXCH: |
849 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 850 | |
a230b26e EK |
851 | case TLS_ST_CR_CERT_REQ: |
852 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 853 | |
a230b26e EK |
854 | case TLS_ST_CR_SRVR_DONE: |
855 | return tls_process_server_done(s, pkt); | |
61ae935a | 856 | |
a230b26e EK |
857 | case TLS_ST_CR_CHANGE: |
858 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 859 | |
a230b26e EK |
860 | case TLS_ST_CR_SESSION_TICKET: |
861 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 862 | |
a230b26e EK |
863 | case TLS_ST_CR_FINISHED: |
864 | return tls_process_finished(s, pkt); | |
e46f2334 | 865 | |
c7f47786 MC |
866 | case TLS_ST_CR_HELLO_REQ: |
867 | return tls_process_hello_req(s, pkt); | |
868 | ||
e46f2334 MC |
869 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
870 | return tls_process_encrypted_extensions(s, pkt); | |
61ae935a | 871 | } |
61ae935a MC |
872 | } |
873 | ||
874 | /* | |
875 | * Perform any further processing required following the receipt of a message | |
876 | * from the server | |
877 | */ | |
8481f583 | 878 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 879 | { |
d6f1a6e9 | 880 | OSSL_STATEM *st = &s->statem; |
61ae935a | 881 | |
a230b26e | 882 | switch (st->hand_state) { |
f3b3d7f0 RS |
883 | default: |
884 | /* Shouldn't happen */ | |
885 | return WORK_ERROR; | |
886 | ||
05c4f1d5 MC |
887 | case TLS_ST_CR_CERT_REQ: |
888 | return tls_prepare_client_certificate(s, wst); | |
889 | ||
61ae935a MC |
890 | #ifndef OPENSSL_NO_SCTP |
891 | case TLS_ST_CR_SRVR_DONE: | |
892 | /* We only get here if we are using SCTP and we are renegotiating */ | |
893 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
894 | s->s3->in_read_app_data = 2; | |
895 | s->rwstate = SSL_READING; | |
896 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
897 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 898 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
899 | return WORK_MORE_A; |
900 | } | |
fe3a3291 | 901 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
902 | return WORK_FINISHED_STOP; |
903 | #endif | |
61ae935a | 904 | } |
61ae935a MC |
905 | } |
906 | ||
7cea05dc | 907 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 908 | { |
2c7b4dbc | 909 | unsigned char *p; |
ec60ccc1 MC |
910 | size_t sess_id_len; |
911 | int i, protverr; | |
2c7b4dbc | 912 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 913 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
914 | SSL_COMP *comp; |
915 | #endif | |
b9908bf9 | 916 | SSL_SESSION *sess = s->session; |
0f113f3e | 917 | |
7cea05dc | 918 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
919 | /* Should not happen */ |
920 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 921 | return 0; |
2c7b4dbc | 922 | } |
0f113f3e | 923 | |
b9908bf9 | 924 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
925 | protverr = ssl_set_client_hello_version(s); |
926 | if (protverr != 0) { | |
927 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 928 | return 0; |
4fa52141 | 929 | } |
0f113f3e | 930 | |
a230b26e | 931 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 932 | /* |
b9908bf9 MC |
933 | * In the case of EAP-FAST, we can have a pre-shared |
934 | * "ticket" without a session ID. | |
0f113f3e | 935 | */ |
aff8c126 | 936 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
937 | (sess->not_resumable)) { |
938 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 939 | return 0; |
b9908bf9 MC |
940 | } |
941 | /* else use the pre-loaded session */ | |
0f113f3e | 942 | |
c7f47786 MC |
943 | /* This is a real handshake so make sure we clean it up at the end */ |
944 | s->statem.cleanuphand = 1; | |
945 | ||
b9908bf9 | 946 | p = s->s3->client_random; |
0f113f3e | 947 | |
b9908bf9 MC |
948 | /* |
949 | * for DTLS if client_random is initialized, reuse it, we are | |
950 | * required to use same upon reply to HelloVerify | |
951 | */ | |
952 | if (SSL_IS_DTLS(s)) { | |
953 | size_t idx; | |
954 | i = 1; | |
955 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
956 | if (p[idx]) { | |
957 | i = 0; | |
958 | break; | |
0f113f3e | 959 | } |
0f113f3e | 960 | } |
b9908bf9 MC |
961 | } else |
962 | i = 1; | |
0f113f3e | 963 | |
a230b26e | 964 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 965 | return 0; |
b9908bf9 | 966 | |
b9908bf9 MC |
967 | /*- |
968 | * version indicates the negotiated version: for example from | |
969 | * an SSLv2/v3 compatible client hello). The client_version | |
970 | * field is the maximum version we permit and it is also | |
971 | * used in RSA encrypted premaster secrets. Some servers can | |
972 | * choke if we initially report a higher version then | |
973 | * renegotiate to a lower one in the premaster secret. This | |
974 | * didn't happen with TLS 1.0 as most servers supported it | |
975 | * but it can with TLS 1.1 or later if the server only supports | |
976 | * 1.0. | |
977 | * | |
978 | * Possible scenario with previous logic: | |
979 | * 1. Client hello indicates TLS 1.2 | |
980 | * 2. Server hello says TLS 1.0 | |
981 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 982 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
983 | * 5. Server sends hello request to renegotiate. |
984 | * 6. Client hello indicates TLS v1.0 as we now | |
985 | * know that is maximum server supports. | |
986 | * 7. Server chokes on RSA encrypted premaster secret | |
987 | * containing version 1.0. | |
988 | * | |
989 | * For interoperability it should be OK to always use the | |
990 | * maximum version we support in client hello and then rely | |
991 | * on the checking of version to ensure the servers isn't | |
992 | * being inconsistent: for example initially negotiating with | |
993 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
994 | * client_version in client hello and not resetting it to | |
995 | * the negotiated version. | |
cd998837 MC |
996 | * |
997 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 998 | * supported_versions extension for the real supported versions. |
b9908bf9 | 999 | */ |
7acb8b64 | 1000 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1001 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1002 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1003 | return 0; |
2c7b4dbc | 1004 | } |
b9908bf9 MC |
1005 | |
1006 | /* Session ID */ | |
f05bcf0f | 1007 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1008 | sess_id_len = 0; |
b9908bf9 | 1009 | else |
ec60ccc1 MC |
1010 | sess_id_len = s->session->session_id_length; |
1011 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1012 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1013 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1014 | sess_id_len)) | |
7cea05dc | 1015 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1016 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1017 | return 0; |
b9908bf9 | 1018 | } |
0f113f3e | 1019 | |
b9908bf9 MC |
1020 | /* cookie stuff for DTLS */ |
1021 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1022 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1023 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1024 | s->d1->cookie_len)) { |
b9908bf9 | 1025 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1026 | return 0; |
0f113f3e | 1027 | } |
b9908bf9 MC |
1028 | } |
1029 | ||
1030 | /* Ciphers supported */ | |
7cea05dc | 1031 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1032 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1033 | return 0; |
2c7b4dbc MC |
1034 | } |
1035 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1036 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1037 | return 0; | |
1038 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1039 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1040 | return 0; |
b9908bf9 | 1041 | } |
0f113f3e | 1042 | |
b9908bf9 | 1043 | /* COMPRESSION */ |
7cea05dc | 1044 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1045 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1046 | return 0; |
2c7b4dbc MC |
1047 | } |
1048 | #ifndef OPENSSL_NO_COMP | |
1049 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1050 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1051 | for (i = 0; i < compnum; i++) { | |
1052 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1053 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1054 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1055 | return 0; |
2c7b4dbc MC |
1056 | } |
1057 | } | |
b9908bf9 | 1058 | } |
09b6c2ef | 1059 | #endif |
2c7b4dbc | 1060 | /* Add the NULL method */ |
7cea05dc | 1061 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1062 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1063 | return 0; |
2c7b4dbc | 1064 | } |
761772d7 | 1065 | |
b9908bf9 | 1066 | /* TLS extensions */ |
30aeba43 | 1067 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1068 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1069 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1070 | return 0; |
b9908bf9 | 1071 | } |
0f113f3e | 1072 | |
b9908bf9 | 1073 | return 1; |
0f113f3e | 1074 | } |
d02b48c6 | 1075 | |
be3583fa | 1076 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1077 | { |
1078 | int al; | |
cb150cbc | 1079 | size_t cookie_len; |
8ba708e5 MC |
1080 | PACKET cookiepkt; |
1081 | ||
1082 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1083 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1084 | al = SSL_AD_DECODE_ERROR; |
1085 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1086 | goto f_err; | |
1087 | } | |
1088 | ||
1089 | cookie_len = PACKET_remaining(&cookiepkt); | |
1090 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1091 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1092 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1093 | goto f_err; | |
1094 | } | |
1095 | ||
1096 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1097 | al = SSL_AD_DECODE_ERROR; | |
1098 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1099 | goto f_err; | |
1100 | } | |
1101 | s->d1->cookie_len = cookie_len; | |
1102 | ||
1103 | return MSG_PROCESS_FINISHED_READING; | |
1104 | f_err: | |
1105 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1106 | ossl_statem_set_error(s); |
8ba708e5 MC |
1107 | return MSG_PROCESS_ERROR; |
1108 | } | |
1109 | ||
be3583fa | 1110 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1111 | { |
1112 | STACK_OF(SSL_CIPHER) *sk; | |
1113 | const SSL_CIPHER *c; | |
332eb390 | 1114 | PACKET session_id, extpkt; |
b9908bf9 | 1115 | size_t session_id_len; |
b6981744 | 1116 | const unsigned char *cipherchars; |
b9908bf9 MC |
1117 | int i, al = SSL_AD_INTERNAL_ERROR; |
1118 | unsigned int compression; | |
4fa52141 | 1119 | unsigned int sversion; |
3434f40b | 1120 | unsigned int context; |
4fa52141 | 1121 | int protverr; |
332eb390 | 1122 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1123 | #ifndef OPENSSL_NO_COMP |
1124 | SSL_COMP *comp; | |
1125 | #endif | |
1126 | ||
4fa52141 VD |
1127 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1128 | al = SSL_AD_DECODE_ERROR; | |
1129 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1130 | goto f_err; | |
1131 | } | |
50932c4a | 1132 | |
4ff65f77 | 1133 | /* We do this immediately so we know what format the ServerHello is in */ |
4fa52141 VD |
1134 | protverr = ssl_choose_client_version(s, sversion); |
1135 | if (protverr != 0) { | |
1136 | al = SSL_AD_PROTOCOL_VERSION; | |
1137 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1138 | goto f_err; | |
0f113f3e | 1139 | } |
0f113f3e MC |
1140 | |
1141 | /* load the server hello data */ | |
1142 | /* load the server random */ | |
73999b62 | 1143 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1144 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1145 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1146 | goto f_err; |
1147 | } | |
0f113f3e | 1148 | |
fc5ce51d | 1149 | /* Get the session-id. */ |
71728dd8 MC |
1150 | if (!SSL_IS_TLS13(s)) { |
1151 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1152 | al = SSL_AD_DECODE_ERROR; | |
1153 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1154 | goto f_err; | |
1155 | } | |
1156 | session_id_len = PACKET_remaining(&session_id); | |
1157 | if (session_id_len > sizeof s->session->session_id | |
1158 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1159 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1160 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1161 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1162 | goto f_err; | |
1163 | } | |
1164 | } else { | |
625b0d51 | 1165 | PACKET_null_init(&session_id); |
71728dd8 | 1166 | session_id_len = 0; |
0f113f3e | 1167 | } |
e481f9b9 | 1168 | |
73999b62 | 1169 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1170 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1171 | al = SSL_AD_DECODE_ERROR; |
1172 | goto f_err; | |
1173 | } | |
1174 | ||
4ff65f77 MC |
1175 | if (!SSL_IS_TLS13(s)) { |
1176 | if (!PACKET_get_1(pkt, &compression)) { | |
1177 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1178 | al = SSL_AD_DECODE_ERROR; | |
1179 | goto f_err; | |
1180 | } | |
1181 | } else { | |
1182 | compression = 0; | |
1183 | } | |
1184 | ||
1185 | /* TLS extensions */ | |
1186 | if (PACKET_remaining(pkt) == 0) { | |
1187 | PACKET_null_init(&extpkt); | |
1188 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
1189 | al = SSL_AD_DECODE_ERROR; | |
1190 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1191 | goto f_err; | |
1192 | } | |
1193 | ||
1194 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO | |
1195 | : EXT_TLS1_2_SERVER_HELLO; | |
1196 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al)) | |
1197 | goto f_err; | |
1198 | ||
1199 | s->hit = 0; | |
1200 | ||
1201 | if (SSL_IS_TLS13(s)) { | |
1202 | /* This will set s->hit if we are resuming */ | |
1203 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
1204 | EXT_TLS1_3_SERVER_HELLO, | |
1205 | extensions, NULL, 0, &al)) | |
1206 | goto f_err; | |
1207 | } else { | |
8c1a5343 | 1208 | /* |
4ff65f77 MC |
1209 | * Check if we can resume the session based on external pre-shared |
1210 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1211 | * Resumption based on server-side state works with session IDs. | |
1212 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1213 | * works by overriding the SessionTicket extension at the application | |
1214 | * layer, and does not send a session ID. (We do not know whether | |
1215 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1216 | * ID alone is not a reliable indicator of session resumption, so we | |
1217 | * first check if we can resume, and later peek at the next handshake | |
1218 | * message to see if the server wants to resume. | |
8c1a5343 | 1219 | */ |
4ff65f77 MC |
1220 | if (s->version >= TLS1_VERSION |
1221 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1222 | const SSL_CIPHER *pref_cipher = NULL; | |
1223 | /* | |
1224 | * s->session->master_key_length is a size_t, but this is an int for | |
1225 | * backwards compat reasons | |
1226 | */ | |
1227 | int master_key_length; | |
1228 | master_key_length = sizeof(s->session->master_key); | |
1229 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1230 | &master_key_length, | |
1231 | NULL, &pref_cipher, | |
1232 | s->ext.session_secret_cb_arg) | |
1233 | && master_key_length > 0) { | |
1234 | s->session->master_key_length = master_key_length; | |
1235 | s->session->cipher = pref_cipher ? | |
1236 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); | |
1237 | } else { | |
1238 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1239 | al = SSL_AD_INTERNAL_ERROR; | |
1240 | goto f_err; | |
1241 | } | |
0f113f3e | 1242 | } |
4ff65f77 MC |
1243 | |
1244 | if (session_id_len != 0 | |
1245 | && session_id_len == s->session->session_id_length | |
1246 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1247 | session_id_len) == 0) | |
1248 | s->hit = 1; | |
50932c4a MC |
1249 | } |
1250 | ||
4ff65f77 | 1251 | if (s->hit) { |
0f113f3e | 1252 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1253 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1254 | /* actually a client application bug */ |
1255 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1256 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1257 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1258 | goto f_err; | |
1259 | } | |
6e3d0153 | 1260 | } else { |
0f113f3e | 1261 | /* |
6e3d0153 | 1262 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1263 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1264 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1265 | * so the PAC-based session secret is always preserved. It'll be | |
1266 | * overwritten if the server refuses resumption. | |
0f113f3e | 1267 | */ |
4ff65f77 MC |
1268 | if (s->session->session_id_length > 0 |
1269 | || (SSL_IS_TLS13(s) | |
1270 | && s->session->ext.tick_identity | |
1271 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1272 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1273 | if (!ssl_get_new_session(s, 0)) { |
1274 | goto f_err; | |
1275 | } | |
1276 | } | |
50932c4a | 1277 | |
ccae4a15 | 1278 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1279 | s->session->session_id_length = session_id_len; |
1280 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1281 | if (session_id_len > 0) |
1282 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1283 | session_id_len); | |
0f113f3e | 1284 | } |
fc5ce51d | 1285 | |
ccae4a15 FI |
1286 | /* Session version and negotiated protocol version should match */ |
1287 | if (s->version != s->session->ssl_version) { | |
1288 | al = SSL_AD_PROTOCOL_VERSION; | |
1289 | ||
1290 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1291 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1292 | goto f_err; | |
1293 | } | |
1294 | ||
50932c4a | 1295 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1296 | if (c == NULL) { |
1297 | /* unknown cipher */ | |
1298 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1299 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1300 | goto f_err; |
1301 | } | |
0f113f3e | 1302 | /* |
3eb2aff4 KR |
1303 | * Now that we know the version, update the check to see if it's an allowed |
1304 | * version. | |
1305 | */ | |
1306 | s->s3->tmp.min_ver = s->version; | |
1307 | s->s3->tmp.max_ver = s->version; | |
1308 | /* | |
1309 | * If it is a disabled cipher we either didn't send it in client hello, | |
1310 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1311 | */ |
1312 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1313 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1314 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1315 | goto f_err; |
1316 | } | |
0f113f3e MC |
1317 | |
1318 | sk = ssl_get_ciphers_by_id(s); | |
1319 | i = sk_SSL_CIPHER_find(sk, c); | |
1320 | if (i < 0) { | |
1321 | /* we did not say we would use this cipher */ | |
1322 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1323 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1324 | goto f_err; |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * Depending on the session caching (internal/external), the cipher | |
1329 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1330 | * set and use it for comparison. | |
1331 | */ | |
1332 | if (s->session->cipher) | |
1333 | s->session->cipher_id = s->session->cipher->id; | |
1334 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1335 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1336 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1337 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1338 | goto f_err; | |
0f113f3e MC |
1339 | } |
1340 | s->s3->tmp.new_cipher = c; | |
71728dd8 | 1341 | |
09b6c2ef | 1342 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1343 | if (compression != 0) { |
0f113f3e | 1344 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1345 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1346 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1347 | goto f_err; | |
1348 | } | |
1349 | /* | |
1350 | * If compression is disabled we'd better not try to resume a session | |
1351 | * using compression. | |
1352 | */ | |
1353 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1354 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1355 | goto f_err; |
1356 | } | |
09b6c2ef | 1357 | #else |
fc5ce51d | 1358 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1359 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1360 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1361 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1362 | goto f_err; | |
1363 | } | |
fc5ce51d | 1364 | if (compression == 0) |
0f113f3e MC |
1365 | comp = NULL; |
1366 | else if (!ssl_allow_compression(s)) { | |
1367 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1368 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1369 | goto f_err; |
fc5ce51d EK |
1370 | } else { |
1371 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1372 | } | |
0f113f3e | 1373 | |
fc5ce51d | 1374 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1375 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1376 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1377 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1378 | goto f_err; | |
1379 | } else { | |
1380 | s->s3->tmp.new_compression = comp; | |
1381 | } | |
09b6c2ef | 1382 | #endif |
761772d7 | 1383 | |
4ff65f77 | 1384 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1385 | goto f_err; |
1386 | ||
8723588e MC |
1387 | #ifndef OPENSSL_NO_SCTP |
1388 | if (SSL_IS_DTLS(s) && s->hit) { | |
1389 | unsigned char sctpauthkey[64]; | |
1390 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1391 | ||
1392 | /* | |
1393 | * Add new shared key for SCTP-Auth, will be ignored if | |
1394 | * no SCTP used. | |
1395 | */ | |
141eb8c6 MC |
1396 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1397 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1398 | |
1399 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1400 | sizeof(sctpauthkey), |
1401 | labelbuffer, | |
1402 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1403 | goto f_err; |
8723588e MC |
1404 | |
1405 | BIO_ctrl(SSL_get_wbio(s), | |
1406 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1407 | sizeof(sctpauthkey), sctpauthkey); | |
1408 | } | |
1409 | #endif | |
1410 | ||
92760c21 MC |
1411 | /* |
1412 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1413 | * we're done with this message | |
1414 | */ | |
1415 | if (SSL_IS_TLS13(s) | |
1416 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1417 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1418 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1419 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1420 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1421 | al = SSL_AD_INTERNAL_ERROR; | |
1422 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1423 | goto f_err; | |
1424 | } | |
1425 | ||
1b0286a3 | 1426 | OPENSSL_free(extensions); |
b9908bf9 | 1427 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1428 | f_err: |
1429 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1430 | ossl_statem_set_error(s); |
1b0286a3 | 1431 | OPENSSL_free(extensions); |
b9908bf9 | 1432 | return MSG_PROCESS_ERROR; |
0f113f3e | 1433 | } |
d02b48c6 | 1434 | |
be3583fa | 1435 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1436 | { |
1437 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1438 | unsigned long cert_list_len, cert_len; | |
1439 | X509 *x = NULL; | |
b6981744 | 1440 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1441 | STACK_OF(X509) *sk = NULL; |
1442 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1443 | size_t chainidx; |
e96e0f8e | 1444 | unsigned int context = 0; |
0f113f3e MC |
1445 | |
1446 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1447 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1448 | goto err; |
0f113f3e MC |
1449 | } |
1450 | ||
e96e0f8e MC |
1451 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1452 | || context != 0 | |
1453 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1454 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1455 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1456 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1457 | goto f_err; |
1458 | } | |
d805a57b | 1459 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1460 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1461 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1462 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1463 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1464 | SSL_R_CERT_LENGTH_MISMATCH); |
1465 | goto f_err; | |
1466 | } | |
1467 | ||
df758a85 MC |
1468 | certstart = certbytes; |
1469 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1470 | if (x == NULL) { |
1471 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1472 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1473 | goto f_err; |
1474 | } | |
df758a85 | 1475 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1476 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1477 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1478 | SSL_R_CERT_LENGTH_MISMATCH); |
1479 | goto f_err; | |
1480 | } | |
e96e0f8e MC |
1481 | |
1482 | if (SSL_IS_TLS13(s)) { | |
1483 | RAW_EXTENSION *rawexts = NULL; | |
1484 | PACKET extensions; | |
1485 | ||
1486 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1487 | al = SSL_AD_DECODE_ERROR; | |
1488 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1489 | goto f_err; | |
1490 | } | |
1491 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
1492 | &rawexts, &al) | |
1493 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, | |
5ee289ea MC |
1494 | rawexts, x, chainidx, &al)) { |
1495 | OPENSSL_free(rawexts); | |
e96e0f8e | 1496 | goto f_err; |
5ee289ea MC |
1497 | } |
1498 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1499 | } |
1500 | ||
0f113f3e | 1501 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1502 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1503 | goto err; |
0f113f3e MC |
1504 | } |
1505 | x = NULL; | |
0f113f3e MC |
1506 | } |
1507 | ||
1508 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1509 | /* |
1510 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1511 | * for client side verification of the server certificate to take place. | |
1512 | * However, historically the code has only checked that *any* flag is set | |
1513 | * to cause server verification to take place. Use of the other flags makes | |
1514 | * no sense in client mode. An attempt to clean up the semantics was | |
1515 | * reverted because at least one application *only* set | |
1516 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1517 | * server verification to take place, after the clean up it silently did | |
1518 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1519 | * sent to them because they are void functions. Therefore, we now use the | |
1520 | * (less clean) historic behaviour of performing validation if any flag is | |
1521 | * set. The *documented* interface remains the same. | |
1522 | */ | |
1523 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1524 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1525 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1526 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1527 | goto f_err; | |
1528 | } | |
1529 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1530 | if (i > 1) { | |
b9908bf9 | 1531 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1532 | al = SSL_AD_HANDSHAKE_FAILURE; |
1533 | goto f_err; | |
1534 | } | |
1535 | ||
c34b0f99 | 1536 | s->session->peer_chain = sk; |
0f113f3e MC |
1537 | /* |
1538 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1539 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1540 | */ |
1541 | x = sk_X509_value(sk, 0); | |
1542 | sk = NULL; | |
1543 | /* | |
1544 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1545 | */ | |
1546 | ||
8382fd3a | 1547 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1548 | |
55a9a16f | 1549 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1550 | x = NULL; |
1551 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1552 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1553 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1554 | goto f_err; | |
1555 | } | |
1556 | ||
1557 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1558 | if (i < 0) { |
0f113f3e MC |
1559 | x = NULL; |
1560 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1561 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1562 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1563 | goto f_err; | |
1564 | } | |
1565 | ||
55a9a16f | 1566 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 | 1567 | if (exp_idx >= 0 && i != exp_idx |
a230b26e EK |
1568 | && (exp_idx != SSL_PKEY_GOST_EC || |
1569 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1570 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1571 | x = NULL; |
1572 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1573 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1574 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1575 | goto f_err; | |
0f113f3e | 1576 | } |
a273c6ee | 1577 | s->session->peer_type = i; |
55a9a16f MC |
1578 | |
1579 | X509_free(s->session->peer); | |
05f0fb9f | 1580 | X509_up_ref(x); |
55a9a16f | 1581 | s->session->peer = x; |
0f113f3e | 1582 | s->session->verify_result = s->verify_result; |
0f113f3e | 1583 | x = NULL; |
2c5dfdc3 MC |
1584 | |
1585 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1586 | if (SSL_IS_TLS13(s) | |
1587 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1588 | sizeof(s->cert_verify_hash), | |
1589 | &s->cert_verify_hash_len)) { | |
1590 | al = SSL_AD_INTERNAL_ERROR; | |
1591 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1592 | goto f_err; | |
1593 | } | |
1594 | ||
b9908bf9 | 1595 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1596 | goto done; |
1597 | ||
0f113f3e | 1598 | f_err: |
66696478 | 1599 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1600 | err: |
fe3a3291 | 1601 | ossl_statem_set_error(s); |
66696478 | 1602 | done: |
0f113f3e MC |
1603 | X509_free(x); |
1604 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1605 | return ret; |
0f113f3e | 1606 | } |
d02b48c6 | 1607 | |
7dc1c647 | 1608 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1609 | { |
1610 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1611 | PACKET psk_identity_hint; |
02a74590 | 1612 | |
7dc1c647 MC |
1613 | /* PSK ciphersuites are preceded by an identity hint */ |
1614 | ||
1615 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1616 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1617 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1618 | return 0; |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Store PSK identity hint for later use, hint is used in | |
1623 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1624 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1625 | * identity. | |
1626 | */ | |
1627 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1628 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1629 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1630 | return 0; |
1631 | } | |
02a74590 | 1632 | |
7dc1c647 MC |
1633 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1634 | OPENSSL_free(s->session->psk_identity_hint); | |
1635 | s->session->psk_identity_hint = NULL; | |
1636 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1637 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1638 | *al = SSL_AD_INTERNAL_ERROR; |
1639 | return 0; | |
1640 | } | |
1641 | ||
1642 | return 1; | |
1643 | #else | |
4fa88861 | 1644 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1645 | *al = SSL_AD_INTERNAL_ERROR; |
1646 | return 0; | |
02a74590 MC |
1647 | #endif |
1648 | } | |
1649 | ||
25c6c10c MC |
1650 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1651 | { | |
1652 | #ifndef OPENSSL_NO_SRP | |
1653 | PACKET prime, generator, salt, server_pub; | |
1654 | ||
1655 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1656 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1657 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1658 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1659 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1660 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1661 | return 0; |
1662 | } | |
1663 | ||
348240c6 | 1664 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1665 | if ((s->srp_ctx.N = |
1666 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1667 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1668 | || (s->srp_ctx.g = |
1669 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1670 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1671 | || (s->srp_ctx.s = |
1672 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1673 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1674 | || (s->srp_ctx.B = |
1675 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1676 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1677 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1678 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1679 | return 0; |
1680 | } | |
1681 | ||
1682 | if (!srp_verify_server_param(s, al)) { | |
1683 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1684 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1685 | return 0; |
1686 | } | |
1687 | ||
1688 | /* We must check if there is a certificate */ | |
a230b26e | 1689 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1690 | *pkey = X509_get0_pubkey(s->session->peer); |
1691 | ||
1692 | return 1; | |
1693 | #else | |
4fa88861 | 1694 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1695 | *al = SSL_AD_INTERNAL_ERROR; |
1696 | return 0; | |
1697 | #endif | |
1698 | } | |
1699 | ||
e01a610d MC |
1700 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1701 | { | |
1702 | #ifndef OPENSSL_NO_DH | |
1703 | PACKET prime, generator, pub_key; | |
1704 | EVP_PKEY *peer_tmp = NULL; | |
1705 | ||
1706 | DH *dh = NULL; | |
1707 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1708 | ||
26505153 RL |
1709 | int check_bits = 0; |
1710 | ||
e01a610d MC |
1711 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1712 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1713 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1714 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1715 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1716 | return 0; |
1717 | } | |
1718 | ||
1719 | peer_tmp = EVP_PKEY_new(); | |
1720 | dh = DH_new(); | |
1721 | ||
1722 | if (peer_tmp == NULL || dh == NULL) { | |
1723 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1724 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1725 | goto err; |
1726 | } | |
1727 | ||
348240c6 MC |
1728 | /* TODO(size_t): Convert these calls */ |
1729 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1730 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1731 | NULL); | |
1732 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1733 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1734 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1735 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1736 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1737 | goto err; |
1738 | } | |
1739 | ||
26505153 RL |
1740 | /* test non-zero pupkey */ |
1741 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1742 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1743 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1744 | goto err; |
1745 | } | |
1746 | ||
1747 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1748 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1749 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1750 | goto err; |
1751 | } | |
1752 | p = g = NULL; | |
1753 | ||
26505153 RL |
1754 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1755 | *al = SSL_AD_DECODE_ERROR; | |
1756 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1757 | goto err; | |
1758 | } | |
1759 | ||
e01a610d MC |
1760 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1761 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1762 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1763 | goto err; |
1764 | } | |
1765 | bnpub_key = NULL; | |
1766 | ||
1767 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1768 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1769 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1770 | goto err; |
1771 | } | |
1772 | ||
1773 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1774 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1775 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1776 | goto err; |
1777 | } | |
1778 | ||
1779 | s->s3->peer_tmp = peer_tmp; | |
1780 | ||
1781 | /* | |
1782 | * FIXME: This makes assumptions about which ciphersuites come with | |
1783 | * public keys. We should have a less ad-hoc way of doing this | |
1784 | */ | |
a230b26e | 1785 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1786 | *pkey = X509_get0_pubkey(s->session->peer); |
1787 | /* else anonymous DH, so no certificate or pkey. */ | |
1788 | ||
1789 | return 1; | |
1790 | ||
1791 | err: | |
1792 | BN_free(p); | |
1793 | BN_free(g); | |
1794 | BN_free(bnpub_key); | |
1795 | DH_free(dh); | |
1796 | EVP_PKEY_free(peer_tmp); | |
1797 | ||
1798 | return 0; | |
1799 | #else | |
4fa88861 | 1800 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1801 | *al = SSL_AD_INTERNAL_ERROR; |
1802 | return 0; | |
1803 | #endif | |
1804 | } | |
1805 | ||
ff74aeb1 MC |
1806 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1807 | { | |
1808 | #ifndef OPENSSL_NO_EC | |
1809 | PACKET encoded_pt; | |
1810 | const unsigned char *ecparams; | |
1811 | int curve_nid; | |
ec24630a | 1812 | unsigned int curve_flags; |
ff74aeb1 MC |
1813 | EVP_PKEY_CTX *pctx = NULL; |
1814 | ||
1815 | /* | |
1816 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1817 | * public key. For now we only support named (not generic) curves and | |
1818 | * ECParameters in this case is just three bytes. | |
1819 | */ | |
1820 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1821 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1822 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1823 | return 0; |
1824 | } | |
1825 | /* | |
1826 | * Check curve is one of our preferences, if not server has sent an | |
1827 | * invalid curve. ECParameters is 3 bytes. | |
1828 | */ | |
1829 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1830 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1831 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1832 | return 0; |
1833 | } | |
1834 | ||
ec24630a DSH |
1835 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1836 | ||
a230b26e | 1837 | if (curve_nid == 0) { |
ff74aeb1 | 1838 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1839 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1840 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1841 | return 0; | |
1842 | } | |
1843 | ||
ec24630a DSH |
1844 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1845 | EVP_PKEY *key = EVP_PKEY_new(); | |
1846 | ||
1847 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1848 | *al = SSL_AD_INTERNAL_ERROR; | |
1849 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1850 | EVP_PKEY_free(key); | |
1851 | return 0; | |
1852 | } | |
1853 | s->s3->peer_tmp = key; | |
1854 | } else { | |
1855 | /* Set up EVP_PKEY with named curve as parameters */ | |
1856 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1857 | if (pctx == NULL | |
1858 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1859 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1860 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1861 | *al = SSL_AD_INTERNAL_ERROR; | |
1862 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1863 | EVP_PKEY_CTX_free(pctx); | |
1864 | return 0; | |
1865 | } | |
ff74aeb1 | 1866 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1867 | pctx = NULL; |
ff74aeb1 | 1868 | } |
ff74aeb1 MC |
1869 | |
1870 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1871 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1872 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1873 | return 0; |
1874 | } | |
1875 | ||
ec24630a DSH |
1876 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1877 | PACKET_data(&encoded_pt), | |
1878 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1879 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1880 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1881 | return 0; |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1886 | * ECParameters in the server key exchange message. We do support RSA | |
1887 | * and ECDSA. | |
1888 | */ | |
1889 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1890 | *pkey = X509_get0_pubkey(s->session->peer); | |
1891 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1892 | *pkey = X509_get0_pubkey(s->session->peer); | |
1893 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1894 | ||
1895 | return 1; | |
1896 | #else | |
4fa88861 | 1897 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1898 | *al = SSL_AD_INTERNAL_ERROR; |
1899 | return 0; | |
1900 | #endif | |
1901 | } | |
1902 | ||
be3583fa | 1903 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1904 | { |
fe3066ee | 1905 | int al = -1, ispss = 0; |
e1e588ac | 1906 | long alg_k; |
b9908bf9 | 1907 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
1908 | EVP_MD_CTX *md_ctx = NULL; |
1909 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 1910 | PACKET save_param_start, signature; |
b9908bf9 | 1911 | |
b9908bf9 MC |
1912 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1913 | ||
73999b62 | 1914 | save_param_start = *pkt; |
8d92c1f8 | 1915 | |
3260adf1 | 1916 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1917 | EVP_PKEY_free(s->s3->peer_tmp); |
1918 | s->s3->peer_tmp = NULL; | |
3260adf1 | 1919 | #endif |
d02b48c6 | 1920 | |
7689082b | 1921 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
1922 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
1923 | goto err; | |
7689082b DSH |
1924 | } |
1925 | ||
1926 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1927 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
1928 | } else if (alg_k & SSL_kSRP) { |
1929 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 1930 | goto err; |
e01a610d MC |
1931 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
1932 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
1933 | goto err; | |
ff74aeb1 MC |
1934 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
1935 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
1936 | goto err; | |
0f113f3e MC |
1937 | } else if (alg_k) { |
1938 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1939 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 1940 | goto err; |
0f113f3e | 1941 | } |
0f113f3e | 1942 | |
0f113f3e MC |
1943 | /* if it was signed, check the signature */ |
1944 | if (pkey != NULL) { | |
32942870 | 1945 | PACKET params; |
be8dba2c MC |
1946 | int maxsig; |
1947 | const EVP_MD *md = NULL; | |
e1e588ac | 1948 | |
32942870 EK |
1949 | /* |
1950 | * |pkt| now points to the beginning of the signature, so the difference | |
1951 | * equals the length of the parameters. | |
1952 | */ | |
1953 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1954 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1955 | PACKET_remaining(pkt))) { |
32942870 | 1956 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1957 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1958 | goto err; |
32942870 EK |
1959 | } |
1960 | ||
0f113f3e | 1961 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 1962 | unsigned int sigalg; |
0f113f3e | 1963 | int rv; |
703bcee0 MC |
1964 | |
1965 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 1966 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1967 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 1968 | goto err; |
0f113f3e | 1969 | } |
703bcee0 | 1970 | rv = tls12_check_peer_sigalg(&md, s, sigalg, pkey); |
e1e588ac MC |
1971 | if (rv == -1) { |
1972 | al = SSL_AD_INTERNAL_ERROR; | |
1973 | goto err; | |
1974 | } else if (rv == 0) { | |
1975 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 1976 | goto err; |
0f113f3e | 1977 | } |
fe3066ee | 1978 | ispss = SIGID_IS_PSS(sigalg); |
a2f9200f | 1979 | #ifdef SSL_DEBUG |
0f113f3e MC |
1980 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1981 | #endif | |
3aeb9348 | 1982 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1983 | md = EVP_md5_sha1(); |
32942870 | 1984 | } else { |
0f113f3e | 1985 | md = EVP_sha1(); |
32942870 | 1986 | } |
0f113f3e | 1987 | |
73999b62 MC |
1988 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1989 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 1990 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1991 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 1992 | goto err; |
0f113f3e | 1993 | } |
be8dba2c MC |
1994 | maxsig = EVP_PKEY_size(pkey); |
1995 | if (maxsig < 0) { | |
e1e588ac | 1996 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1997 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1998 | goto err; |
8098fc56 | 1999 | } |
0f113f3e MC |
2000 | |
2001 | /* | |
8098fc56 | 2002 | * Check signature length |
0f113f3e | 2003 | */ |
be8dba2c | 2004 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2005 | /* wrong packet length */ |
e1e588ac | 2006 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2007 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2008 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2009 | goto err; |
2010 | } | |
2011 | ||
2012 | md_ctx = EVP_MD_CTX_new(); | |
2013 | if (md_ctx == NULL) { | |
2014 | al = SSL_AD_INTERNAL_ERROR; | |
2015 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2016 | goto err; | |
0f113f3e | 2017 | } |
e1e588ac | 2018 | |
fe3066ee MC |
2019 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2020 | al = SSL_AD_INTERNAL_ERROR; | |
2021 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2022 | goto err; | |
2023 | } | |
2024 | if (ispss) { | |
2025 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 | |
2026 | /* -1 here means set saltlen to the digest len */ | |
2027 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1) <= 0) { | |
2028 | al = SSL_AD_INTERNAL_ERROR; | |
2029 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2030 | goto err; | |
2031 | } | |
2032 | } | |
2033 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2034 | SSL3_RANDOM_SIZE) <= 0 | |
2035 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2036 | SSL3_RANDOM_SIZE) <= 0 | |
2037 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2038 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2039 | al = SSL_AD_INTERNAL_ERROR; |
2040 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2041 | goto err; |
192e4bbb | 2042 | } |
fe3066ee MC |
2043 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2044 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2045 | /* bad signature */ |
2046 | al = SSL_AD_DECRYPT_ERROR; | |
2047 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2048 | goto err; |
0f113f3e | 2049 | } |
e1e588ac | 2050 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2051 | md_ctx = NULL; |
0f113f3e | 2052 | } else { |
7689082b | 2053 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2054 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2055 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2056 | /* Might be wrong key type, check it */ |
e1e588ac | 2057 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2058 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2059 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2060 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2061 | } else { |
2062 | al = SSL_AD_DECODE_ERROR; | |
2063 | } | |
0f113f3e MC |
2064 | goto err; |
2065 | } | |
2066 | /* still data left over */ | |
73999b62 | 2067 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2068 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2069 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2070 | goto err; |
0f113f3e MC |
2071 | } |
2072 | } | |
e1e588ac | 2073 | |
b9908bf9 | 2074 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2075 | err: |
7dc1c647 MC |
2076 | if (al != -1) |
2077 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2078 | ossl_statem_set_error(s); |
fe3066ee | 2079 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2080 | return MSG_PROCESS_ERROR; |
0f113f3e | 2081 | } |
d02b48c6 | 2082 | |
be3583fa | 2083 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2084 | { |
2085 | int ret = MSG_PROCESS_ERROR; | |
2086 | unsigned int list_len, ctype_num, i, name_len; | |
2087 | X509_NAME *xn = NULL; | |
b6981744 EK |
2088 | const unsigned char *data; |
2089 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 2090 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
2091 | |
2092 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2093 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2094 | goto err; |
2095 | } | |
2096 | ||
2097 | /* get the certificate types */ | |
73999b62 | 2098 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 2099 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 2100 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2101 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
2102 | goto err; |
2103 | } | |
b548a1f1 RS |
2104 | OPENSSL_free(s->cert->ctypes); |
2105 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2106 | if (ctype_num > SSL3_CT_NUMBER) { |
2107 | /* If we exceed static buffer copy all to cert structure */ | |
2108 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2109 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 2110 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2111 | goto err; |
2112 | } | |
ac112332 | 2113 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 2114 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
2115 | ctype_num = SSL3_CT_NUMBER; |
2116 | } | |
2117 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2118 | s->s3->tmp.ctype[i] = data[i]; |
2119 | ||
0f113f3e | 2120 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2121 | PACKET sigalgs; |
2122 | ||
2123 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2124 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2125 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2126 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2127 | goto err; |
2128 | } | |
ac112332 | 2129 | |
0f113f3e MC |
2130 | /* Clear certificate digests and validity flags */ |
2131 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2132 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2133 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2134 | } |
703bcee0 | 2135 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2136 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2137 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2138 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2139 | goto err; | |
2140 | } | |
2141 | if (!tls1_process_sigalgs(s)) { | |
2142 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2143 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2144 | goto err; |
2145 | } | |
a0f63828 DSH |
2146 | } else { |
2147 | ssl_set_default_md(s); | |
0f113f3e MC |
2148 | } |
2149 | ||
2150 | /* get the CA RDNs */ | |
73999b62 | 2151 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2152 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2153 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2154 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2155 | goto err; |
2156 | } | |
2157 | ||
73999b62 MC |
2158 | while (PACKET_remaining(pkt)) { |
2159 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2160 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2161 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2162 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2163 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2164 | goto err; |
2165 | } | |
2166 | ||
ac112332 | 2167 | namestart = namebytes; |
0f113f3e | 2168 | |
ac112332 MC |
2169 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2170 | name_len)) == NULL) { | |
3c33c6f6 | 2171 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2172 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2173 | goto err; |
0f113f3e MC |
2174 | } |
2175 | ||
ac112332 | 2176 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2177 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2178 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2179 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2180 | goto err; | |
2181 | } | |
2182 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2183 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2184 | goto err; |
2185 | } | |
6afef8b1 | 2186 | xn = NULL; |
0f113f3e MC |
2187 | } |
2188 | ||
0f113f3e MC |
2189 | /* we should setup a certificate to return.... */ |
2190 | s->s3->tmp.cert_req = 1; | |
2191 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2192 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2193 | s->s3->tmp.ca_names = ca_sk; |
2194 | ca_sk = NULL; | |
2195 | ||
05c4f1d5 | 2196 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2197 | goto done; |
0f113f3e | 2198 | err: |
fe3a3291 | 2199 | ossl_statem_set_error(s); |
cc273a93 | 2200 | done: |
6afef8b1 | 2201 | X509_NAME_free(xn); |
222561fe | 2202 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2203 | return ret; |
0f113f3e MC |
2204 | } |
2205 | ||
2206 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2207 | { |
0f113f3e | 2208 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2209 | } |
dfeab068 | 2210 | |
be3583fa | 2211 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2212 | { |
6df55cac | 2213 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2214 | unsigned int ticklen; |
9ac6244b | 2215 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2216 | unsigned int sess_len; |
de1df7e9 | 2217 | RAW_EXTENSION *exts = NULL; |
b9908bf9 | 2218 | |
73999b62 | 2219 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
fc24f0bf | 2220 | || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add)) |
a230b26e | 2221 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2222 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2223 | || (SSL_IS_TLS13(s) |
2224 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2225 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2226 | goto f_err; |
2227 | } | |
2228 | ||
de1df7e9 MC |
2229 | /* |
2230 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2231 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2232 | * be 0 here in that instance | |
2233 | */ | |
e711da71 | 2234 | if (ticklen == 0) |
c9de4a20 | 2235 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2236 | |
de1df7e9 | 2237 | /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */ |
98ece4ee MC |
2238 | if (s->session->session_id_length > 0) { |
2239 | int i = s->session_ctx->session_cache_mode; | |
2240 | SSL_SESSION *new_sess; | |
2241 | /* | |
2242 | * We reused an existing session, so we need to replace it with a new | |
2243 | * one | |
2244 | */ | |
2245 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2246 | /* | |
e4612d02 | 2247 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2248 | */ |
e4612d02 | 2249 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2250 | } |
2251 | ||
2252 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2253 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2254 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2255 | goto f_err; |
2256 | } | |
2257 | ||
2258 | SSL_SESSION_free(s->session); | |
2259 | s->session = new_sess; | |
2260 | } | |
2261 | ||
fc24f0bf MC |
2262 | /* |
2263 | * Technically the cast to long here is not guaranteed by the C standard - | |
2264 | * but we use it elsewhere, so this should be ok. | |
2265 | */ | |
2266 | s->session->time = (long)time(NULL); | |
2267 | ||
aff8c126 RS |
2268 | OPENSSL_free(s->session->ext.tick); |
2269 | s->session->ext.tick = NULL; | |
2270 | s->session->ext.ticklen = 0; | |
e711da71 | 2271 | |
aff8c126 RS |
2272 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2273 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2274 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2275 | goto err; |
2276 | } | |
aff8c126 | 2277 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2278 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2279 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2280 | goto f_err; |
2281 | } | |
e711da71 | 2282 | |
aff8c126 | 2283 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2284 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2285 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2286 | |
2287 | if (SSL_IS_TLS13(s)) { | |
2288 | PACKET extpkt; | |
2289 | ||
2290 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
2291 | || !tls_collect_extensions(s, &extpkt, | |
2292 | EXT_TLS1_3_NEW_SESSION_TICKET, | |
2293 | &exts, &al) | |
2294 | || !tls_parse_all_extensions(s, EXT_TLS1_3_NEW_SESSION_TICKET, | |
2295 | exts, NULL, 0, &al)) { | |
2296 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
2297 | goto f_err; | |
2298 | } | |
2299 | } | |
2300 | ||
0f113f3e MC |
2301 | /* |
2302 | * There are two ways to detect a resumed ticket session. One is to set | |
2303 | * an appropriate session ID and then the server must return a match in | |
2304 | * ServerHello. This allows the normal client session ID matching to work | |
2305 | * and we know much earlier that the ticket has been accepted. The | |
2306 | * other way is to set zero length session ID when the ticket is | |
2307 | * presented and rely on the handshake to determine session resumption. | |
2308 | * We choose the former approach because this fits in with assumptions | |
2309 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2310 | * SHA256 is disabled) hash of the ticket. | |
2311 | */ | |
ec60ccc1 MC |
2312 | /* |
2313 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2314 | * but s->session->session_id_length is a size_t | |
2315 | */ | |
aff8c126 | 2316 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2317 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2318 | EVP_sha256(), NULL)) { |
2319 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2320 | goto err; | |
2321 | } | |
ec60ccc1 | 2322 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2323 | |
2324 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2325 | if (SSL_IS_TLS13(s)) { | |
2326 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); | |
2327 | return MSG_PROCESS_FINISHED_READING; | |
2328 | } | |
2329 | ||
b9908bf9 | 2330 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2331 | f_err: |
2332 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2333 | err: | |
fe3a3291 | 2334 | ossl_statem_set_error(s); |
b9908bf9 | 2335 | return MSG_PROCESS_ERROR; |
0f113f3e | 2336 | } |
67c8e7f4 | 2337 | |
f63e4288 MC |
2338 | /* |
2339 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2340 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2341 | * |*al| is populated with a suitable alert code. | |
2342 | */ | |
2343 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2344 | { |
8b0e934a | 2345 | size_t resplen; |
b9908bf9 | 2346 | unsigned int type; |
b9908bf9 | 2347 | |
73999b62 | 2348 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2349 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2350 | *al = SSL_AD_DECODE_ERROR; |
2351 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2352 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2353 | return 0; | |
0f113f3e | 2354 | } |
56a26ce3 MC |
2355 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2356 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2357 | *al = SSL_AD_DECODE_ERROR; |
2358 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2359 | return 0; | |
0f113f3e | 2360 | } |
8cbfcc70 RS |
2361 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2362 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2363 | *al = SSL_AD_INTERNAL_ERROR; |
2364 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2365 | return 0; | |
0f113f3e | 2366 | } |
8cbfcc70 | 2367 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2368 | *al = SSL_AD_DECODE_ERROR; |
2369 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2370 | return 0; | |
ac63710a | 2371 | } |
8cbfcc70 | 2372 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2373 | |
2374 | return 1; | |
2375 | } | |
2faa1b48 | 2376 | |
f63e4288 MC |
2377 | |
2378 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2379 | { | |
2380 | int al; | |
2381 | ||
2382 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2383 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2384 | ossl_statem_set_error(s); | |
2385 | return MSG_PROCESS_ERROR; | |
2386 | } | |
2387 | ||
b9908bf9 | 2388 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2389 | } |
d02b48c6 | 2390 | |
7776a36c MC |
2391 | /* |
2392 | * Perform miscellaneous checks and processing after we have received the | |
2393 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2394 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2395 | * on failure. | |
7776a36c MC |
2396 | */ |
2397 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2398 | { |
a455d0f6 MC |
2399 | /* |
2400 | * at this point we check that we have the required stuff from | |
2401 | * the server | |
2402 | */ | |
2403 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2404 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2405 | return 0; | |
a455d0f6 MC |
2406 | } |
2407 | ||
bb1aaab4 | 2408 | /* |
aff8c126 RS |
2409 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2410 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2411 | * message, or NULL and -1 otherwise |
2412 | */ | |
aff8c126 RS |
2413 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2414 | && s->ctx->ext.status_cb != NULL) { | |
2415 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2416 | ||
bb1aaab4 | 2417 | if (ret == 0) { |
7776a36c MC |
2418 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2419 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2420 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2421 | return 0; |
bb1aaab4 MC |
2422 | } |
2423 | if (ret < 0) { | |
7776a36c MC |
2424 | *al = SSL_AD_INTERNAL_ERROR; |
2425 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2426 | ERR_R_MALLOC_FAILURE); | |
2427 | return 0; | |
bb1aaab4 MC |
2428 | } |
2429 | } | |
ed29e82a RP |
2430 | #ifndef OPENSSL_NO_CT |
2431 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2432 | /* Note we validate the SCTs whether or not we abort on error */ |
2433 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2434 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2435 | return 0; | |
ed29e82a RP |
2436 | } |
2437 | } | |
2438 | #endif | |
2439 | ||
7776a36c MC |
2440 | return 1; |
2441 | } | |
2442 | ||
2443 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2444 | { | |
2445 | int al = SSL_AD_INTERNAL_ERROR; | |
2446 | ||
2447 | if (PACKET_remaining(pkt) > 0) { | |
2448 | /* should contain no data */ | |
2449 | al = SSL_AD_DECODE_ERROR; | |
2450 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2451 | goto err; | |
2452 | } | |
2453 | #ifndef OPENSSL_NO_SRP | |
2454 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2455 | if (SRP_Calc_A_param(s) <= 0) { | |
2456 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2457 | goto err; | |
2458 | } | |
2459 | } | |
2460 | #endif | |
2461 | ||
2462 | /* | |
2463 | * Error queue messages are generated directly by this function | |
2464 | */ | |
2465 | if (!tls_process_initial_server_flight(s, &al)) | |
2466 | goto err; | |
2467 | ||
473483d4 MC |
2468 | #ifndef OPENSSL_NO_SCTP |
2469 | /* Only applies to renegotiation */ | |
2470 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2471 | && s->renegotiate != 0) |
473483d4 MC |
2472 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2473 | else | |
2474 | #endif | |
2475 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2476 | |
2477 | err: | |
2478 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2479 | ossl_statem_set_error(s); | |
2480 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2481 | } |
176f31dd | 2482 | |
f1ec23c0 | 2483 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2484 | { |
7689082b | 2485 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2486 | int ret = 0; |
2487 | /* | |
2488 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2489 | * \0-terminated identity. The last byte is for us for simulating | |
2490 | * strnlen. | |
2491 | */ | |
2492 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2493 | size_t identitylen = 0; | |
2494 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2495 | unsigned char *tmppsk = NULL; | |
2496 | char *tmpidentity = NULL; | |
2497 | size_t psklen = 0; | |
2498 | ||
2499 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2500 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2501 | *al = SSL_AD_INTERNAL_ERROR; |
2502 | goto err; | |
2503 | } | |
d02b48c6 | 2504 | |
13c0ec4a | 2505 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2506 | |
13c0ec4a MC |
2507 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2508 | identity, sizeof(identity) - 1, | |
2509 | psk, sizeof(psk)); | |
7689082b | 2510 | |
13c0ec4a | 2511 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2512 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2513 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2514 | goto err; | |
2515 | } else if (psklen == 0) { | |
05ec6a25 | 2516 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2517 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2518 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2519 | goto err; | |
2520 | } | |
7689082b | 2521 | |
13c0ec4a MC |
2522 | identitylen = strlen(identity); |
2523 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2524 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2525 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2526 | goto err; | |
2527 | } | |
7689082b | 2528 | |
13c0ec4a MC |
2529 | tmppsk = OPENSSL_memdup(psk, psklen); |
2530 | tmpidentity = OPENSSL_strdup(identity); | |
2531 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2532 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2533 | *al = SSL_AD_INTERNAL_ERROR; |
2534 | goto err; | |
2535 | } | |
7689082b | 2536 | |
13c0ec4a MC |
2537 | OPENSSL_free(s->s3->tmp.psk); |
2538 | s->s3->tmp.psk = tmppsk; | |
2539 | s->s3->tmp.psklen = psklen; | |
2540 | tmppsk = NULL; | |
2541 | OPENSSL_free(s->session->psk_identity); | |
2542 | s->session->psk_identity = tmpidentity; | |
2543 | tmpidentity = NULL; | |
f1ec23c0 | 2544 | |
b2b3024e | 2545 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2546 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2547 | *al = SSL_AD_INTERNAL_ERROR; | |
2548 | goto err; | |
2549 | } | |
7689082b | 2550 | |
13c0ec4a | 2551 | ret = 1; |
0bce0b02 | 2552 | |
13c0ec4a MC |
2553 | err: |
2554 | OPENSSL_cleanse(psk, psklen); | |
2555 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2556 | OPENSSL_clear_free(tmppsk, psklen); | |
2557 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2558 | |
13c0ec4a MC |
2559 | return ret; |
2560 | #else | |
05ec6a25 | 2561 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2562 | *al = SSL_AD_INTERNAL_ERROR; |
2563 | return 0; | |
b9908bf9 | 2564 | #endif |
13c0ec4a | 2565 | } |
b9908bf9 | 2566 | |
f1ec23c0 | 2567 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2568 | { |
bc36ee62 | 2569 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2570 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2571 | EVP_PKEY *pkey = NULL; |
2572 | EVP_PKEY_CTX *pctx = NULL; | |
2573 | size_t enclen; | |
2574 | unsigned char *pms = NULL; | |
2575 | size_t pmslen = 0; | |
b9908bf9 | 2576 | |
13c0ec4a MC |
2577 | if (s->session->peer == NULL) { |
2578 | /* | |
2579 | * We should always have a server certificate with SSL_kRSA. | |
2580 | */ | |
05ec6a25 | 2581 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2582 | return 0; |
2583 | } | |
0f113f3e | 2584 | |
13c0ec4a MC |
2585 | pkey = X509_get0_pubkey(s->session->peer); |
2586 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2587 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2588 | return 0; |
2589 | } | |
0f113f3e | 2590 | |
13c0ec4a MC |
2591 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2592 | pms = OPENSSL_malloc(pmslen); | |
2593 | if (pms == NULL) { | |
05ec6a25 | 2594 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2595 | *al = SSL_AD_INTERNAL_ERROR; |
2596 | return 0; | |
2597 | } | |
0bce0b02 | 2598 | |
13c0ec4a MC |
2599 | pms[0] = s->client_version >> 8; |
2600 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2601 | /* TODO(size_t): Convert this function */ |
2602 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2603 | goto err; |
2604 | } | |
0f113f3e | 2605 | |
13c0ec4a | 2606 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2607 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2608 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2609 | goto err; | |
2610 | } | |
13c0ec4a MC |
2611 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2612 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2613 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2614 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2615 | goto err; |
2616 | } | |
f1ec23c0 MC |
2617 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2618 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2619 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2620 | goto err; |
2621 | } | |
13c0ec4a MC |
2622 | EVP_PKEY_CTX_free(pctx); |
2623 | pctx = NULL; | |
0f113f3e | 2624 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2625 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2626 | (*p)[1]++; | |
2627 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2628 | tmp_buf[0] = 0x70; | |
0f113f3e | 2629 | # endif |
0f113f3e | 2630 | |
13c0ec4a | 2631 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2632 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2633 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2634 | goto err; | |
b9908bf9 | 2635 | } |
13c0ec4a MC |
2636 | |
2637 | s->s3->tmp.pms = pms; | |
2638 | s->s3->tmp.pmslen = pmslen; | |
2639 | ||
2faa1b48 CB |
2640 | /* Log the premaster secret, if logging is enabled. */ |
2641 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2642 | goto err; | |
2643 | ||
13c0ec4a MC |
2644 | return 1; |
2645 | err: | |
2646 | OPENSSL_clear_free(pms, pmslen); | |
2647 | EVP_PKEY_CTX_free(pctx); | |
2648 | ||
2649 | return 0; | |
2650 | #else | |
05ec6a25 | 2651 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2652 | *al = SSL_AD_INTERNAL_ERROR; |
2653 | return 0; | |
f9b3bff6 | 2654 | #endif |
13c0ec4a MC |
2655 | } |
2656 | ||
f1ec23c0 | 2657 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2658 | { |
2659 | #ifndef OPENSSL_NO_DH | |
2660 | DH *dh_clnt = NULL; | |
2661 | const BIGNUM *pub_key; | |
2662 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2663 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2664 | |
2665 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2666 | if (skey == NULL) |
2667 | goto err; | |
2668 | ||
0a699a07 | 2669 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2670 | if (ckey == NULL) |
2671 | goto err; | |
2672 | ||
a8c1c704 MC |
2673 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2674 | ||
0f1e51ea | 2675 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2676 | goto err; |
a8c1c704 MC |
2677 | |
2678 | /* send off the data */ | |
2679 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2680 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2681 | goto err; |
2682 | ||
2683 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2684 | EVP_PKEY_free(ckey); |
2685 | ||
2686 | return 1; | |
f1ec23c0 MC |
2687 | err: |
2688 | EVP_PKEY_free(ckey); | |
2689 | #endif | |
05ec6a25 | 2690 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2691 | *al = SSL_AD_INTERNAL_ERROR; |
2692 | return 0; | |
a8c1c704 MC |
2693 | } |
2694 | ||
f1ec23c0 | 2695 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2696 | { |
2697 | #ifndef OPENSSL_NO_EC | |
2698 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2699 | size_t encoded_pt_len = 0; |
67ad5aab | 2700 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2701 | int ret = 0; |
67ad5aab MC |
2702 | |
2703 | skey = s->s3->peer_tmp; | |
ec24630a | 2704 | if (skey == NULL) { |
05ec6a25 | 2705 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2706 | return 0; |
2707 | } | |
2708 | ||
0a699a07 | 2709 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2710 | if (ckey == NULL) { |
2711 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2712 | goto err; | |
2713 | } | |
67ad5aab | 2714 | |
0f1e51ea | 2715 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2716 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2717 | goto err; |
2718 | } | |
2719 | ||
2720 | /* Generate encoding of client key */ | |
ec24630a | 2721 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2722 | |
2723 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2724 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2725 | goto err; |
2726 | } | |
2727 | ||
b2b3024e | 2728 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2729 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2730 | goto err; | |
2731 | } | |
67ad5aab | 2732 | |
f1ec23c0 | 2733 | ret = 1; |
67ad5aab | 2734 | err: |
f1ec23c0 | 2735 | OPENSSL_free(encodedPoint); |
67ad5aab | 2736 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2737 | return ret; |
67ad5aab | 2738 | #else |
05ec6a25 | 2739 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2740 | *al = SSL_AD_INTERNAL_ERROR; |
2741 | return 0; | |
2742 | #endif | |
2743 | } | |
2744 | ||
f1ec23c0 | 2745 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2746 | { |
2747 | #ifndef OPENSSL_NO_GOST | |
2748 | /* GOST key exchange message creation */ | |
2749 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2750 | X509 *peer_cert; | |
2751 | size_t msglen; | |
2752 | unsigned int md_len; | |
2753 | unsigned char shared_ukm[32], tmp[256]; | |
2754 | EVP_MD_CTX *ukm_hash = NULL; | |
2755 | int dgst_nid = NID_id_GostR3411_94; | |
2756 | unsigned char *pms = NULL; | |
2757 | size_t pmslen = 0; | |
2758 | ||
2759 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2760 | dgst_nid = NID_id_GostR3411_2012_256; | |
2761 | ||
2762 | /* | |
2763 | * Get server sertificate PKEY and create ctx from it | |
2764 | */ | |
2765 | peer_cert = s->session->peer; | |
2766 | if (!peer_cert) { | |
2767 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2768 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2769 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2770 | return 0; | |
2771 | } | |
2772 | ||
2773 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2774 | if (pkey_ctx == NULL) { | |
2775 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2776 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2777 | return 0; |
2778 | } | |
2779 | /* | |
2780 | * If we have send a certificate, and certificate key | |
2781 | * parameters match those of server certificate, use | |
2782 | * certificate key for key exchange | |
2783 | */ | |
2784 | ||
2785 | /* Otherwise, generate ephemeral key pair */ | |
2786 | pmslen = 32; | |
2787 | pms = OPENSSL_malloc(pmslen); | |
2788 | if (pms == NULL) { | |
2789 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2790 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2791 | goto err; |
e00e0b3d MC |
2792 | } |
2793 | ||
2794 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2795 | /* Generate session key |
2796 | * TODO(size_t): Convert this function | |
2797 | */ | |
2798 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2799 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2800 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2801 | goto err; |
2802 | }; | |
e00e0b3d MC |
2803 | /* |
2804 | * Compute shared IV and store it in algorithm-specific context | |
2805 | * data | |
2806 | */ | |
2807 | ukm_hash = EVP_MD_CTX_new(); | |
2808 | if (ukm_hash == NULL | |
a230b26e EK |
2809 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2810 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2811 | SSL3_RANDOM_SIZE) <= 0 | |
2812 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2813 | SSL3_RANDOM_SIZE) <= 0 | |
2814 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2815 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2816 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2817 | goto err; |
2818 | } | |
2819 | EVP_MD_CTX_free(ukm_hash); | |
2820 | ukm_hash = NULL; | |
2821 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2822 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2823 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2824 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2825 | goto err; |
2826 | } | |
2827 | /* Make GOST keytransport blob message */ | |
2828 | /* | |
2829 | * Encapsulate it into sequence | |
2830 | */ | |
e00e0b3d MC |
2831 | msglen = 255; |
2832 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2833 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2834 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2835 | goto err; |
2836 | } | |
f1ec23c0 | 2837 | |
08029dfa MC |
2838 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2839 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2840 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2841 | *al = SSL_AD_INTERNAL_ERROR; |
2842 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2843 | goto err; | |
e00e0b3d | 2844 | } |
f1ec23c0 | 2845 | |
e00e0b3d MC |
2846 | EVP_PKEY_CTX_free(pkey_ctx); |
2847 | s->s3->tmp.pms = pms; | |
2848 | s->s3->tmp.pmslen = pmslen; | |
2849 | ||
2850 | return 1; | |
2851 | err: | |
2852 | EVP_PKEY_CTX_free(pkey_ctx); | |
2853 | OPENSSL_clear_free(pms, pmslen); | |
2854 | EVP_MD_CTX_free(ukm_hash); | |
2855 | return 0; | |
2856 | #else | |
05ec6a25 | 2857 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2858 | *al = SSL_AD_INTERNAL_ERROR; |
2859 | return 0; | |
2860 | #endif | |
2861 | } | |
2862 | ||
f1ec23c0 | 2863 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2864 | { |
8b9546c7 | 2865 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2866 | unsigned char *abytes = NULL; |
2867 | ||
2868 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2869 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2870 | &abytes)) { | |
05ec6a25 | 2871 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2872 | return 0; |
2873 | } | |
f1ec23c0 MC |
2874 | BN_bn2bin(s->srp_ctx.A, abytes); |
2875 | ||
840a2bf8 MC |
2876 | OPENSSL_free(s->session->srp_username); |
2877 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2878 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2879 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2880 | return 0; |
2881 | } | |
2882 | ||
2883 | return 1; | |
2884 | #else | |
05ec6a25 | 2885 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2886 | *al = SSL_AD_INTERNAL_ERROR; |
2887 | return 0; | |
2888 | #endif | |
2889 | } | |
2890 | ||
7cea05dc | 2891 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2892 | { |
13c0ec4a MC |
2893 | unsigned long alg_k; |
2894 | int al = -1; | |
2895 | ||
f1ec23c0 | 2896 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2897 | |
13c0ec4a | 2898 | if ((alg_k & SSL_PSK) |
7cea05dc | 2899 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2900 | goto err; |
2901 | ||
f1ec23c0 | 2902 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2903 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 2904 | goto err; |
a8c1c704 | 2905 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 2906 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 2907 | goto err; |
67ad5aab | 2908 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 2909 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 2910 | goto err; |
e00e0b3d | 2911 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 2912 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 2913 | goto err; |
840a2bf8 | 2914 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 2915 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 2916 | goto err; |
4a424545 | 2917 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
2918 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2919 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2920 | goto err; | |
2921 | } | |
2922 | ||
b9908bf9 | 2923 | return 1; |
0f113f3e | 2924 | err: |
13c0ec4a MC |
2925 | if (al != -1) |
2926 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 2927 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 2928 | s->s3->tmp.pms = NULL; |
7689082b DSH |
2929 | #ifndef OPENSSL_NO_PSK |
2930 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2931 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2932 | #endif |
b9908bf9 MC |
2933 | return 0; |
2934 | } | |
2935 | ||
2936 | int tls_client_key_exchange_post_work(SSL *s) | |
2937 | { | |
2938 | unsigned char *pms = NULL; | |
2939 | size_t pmslen = 0; | |
2940 | ||
6f137370 MC |
2941 | pms = s->s3->tmp.pms; |
2942 | pmslen = s->s3->tmp.pmslen; | |
2943 | ||
b9908bf9 MC |
2944 | #ifndef OPENSSL_NO_SRP |
2945 | /* Check for SRP */ | |
2946 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2947 | if (!srp_generate_client_master_secret(s)) { | |
2948 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2949 | ERR_R_INTERNAL_ERROR); | |
2950 | goto err; | |
2951 | } | |
2952 | return 1; | |
2953 | } | |
2954 | #endif | |
b9908bf9 MC |
2955 | |
2956 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2957 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2958 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2959 | goto err; | |
2960 | } | |
2961 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2962 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2963 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
2964 | /* ssl_generate_master_secret frees the pms even on error */ |
2965 | pms = NULL; | |
2966 | pmslen = 0; | |
b9908bf9 MC |
2967 | goto err; |
2968 | } | |
6f137370 MC |
2969 | pms = NULL; |
2970 | pmslen = 0; | |
473483d4 MC |
2971 | |
2972 | #ifndef OPENSSL_NO_SCTP | |
2973 | if (SSL_IS_DTLS(s)) { | |
2974 | unsigned char sctpauthkey[64]; | |
2975 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2976 | ||
2977 | /* | |
2978 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2979 | * used. | |
2980 | */ | |
141eb8c6 MC |
2981 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2982 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2983 | |
2984 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
2985 | sizeof(sctpauthkey), labelbuffer, |
2986 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
2987 | goto err; |
2988 | ||
2989 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2990 | sizeof(sctpauthkey), sctpauthkey); | |
2991 | } | |
2992 | #endif | |
2993 | ||
b9908bf9 MC |
2994 | return 1; |
2995 | err: | |
2996 | OPENSSL_clear_free(pms, pmslen); | |
2997 | s->s3->tmp.pms = NULL; | |
2998 | return 0; | |
0f113f3e | 2999 | } |
d02b48c6 | 3000 | |
0f113f3e MC |
3001 | /* |
3002 | * Check a certificate can be used for client authentication. Currently check | |
3003 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3004 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3005 | */ |
3006 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3007 | { |
0f113f3e MC |
3008 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
3009 | return 0; | |
3010 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 3011 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
3012 | return 0; |
3013 | /* | |
3014 | * If strict mode check suitability of chain before using it. This also | |
3015 | * adjusts suite B digest if necessary. | |
3016 | */ | |
3017 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3018 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3019 | return 0; | |
0f113f3e MC |
3020 | return 1; |
3021 | } | |
0d609395 | 3022 | |
be3583fa | 3023 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3024 | { |
3025 | X509 *x509 = NULL; | |
3026 | EVP_PKEY *pkey = NULL; | |
3027 | int i; | |
3028 | ||
b9908bf9 | 3029 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3030 | /* Let cert callback update client certificates if required */ |
3031 | if (s->cert->cert_cb) { | |
3032 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3033 | if (i < 0) { | |
3034 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3035 | return WORK_MORE_A; |
0f113f3e MC |
3036 | } |
3037 | if (i == 0) { | |
3038 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3039 | ossl_statem_set_error(s); |
0f113f3e MC |
3040 | return 0; |
3041 | } | |
3042 | s->rwstate = SSL_NOTHING; | |
3043 | } | |
3044 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3045 | return WORK_FINISHED_CONTINUE; |
3046 | ||
3047 | /* Fall through to WORK_MORE_B */ | |
3048 | wst = WORK_MORE_B; | |
0f113f3e MC |
3049 | } |
3050 | ||
3051 | /* We need to get a client cert */ | |
b9908bf9 | 3052 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3053 | /* |
3054 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3055 | * return(-1); We then get retied later | |
3056 | */ | |
0f113f3e MC |
3057 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3058 | if (i < 0) { | |
3059 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3060 | return WORK_MORE_B; |
0f113f3e MC |
3061 | } |
3062 | s->rwstate = SSL_NOTHING; | |
3063 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3064 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3065 | i = 0; | |
3066 | } else if (i == 1) { | |
3067 | i = 0; | |
b9908bf9 | 3068 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3069 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3070 | } | |
3071 | ||
222561fe | 3072 | X509_free(x509); |
25aaa98a | 3073 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3074 | if (i && !ssl3_check_client_certificate(s)) |
3075 | i = 0; | |
3076 | if (i == 0) { | |
3077 | if (s->version == SSL3_VERSION) { | |
3078 | s->s3->tmp.cert_req = 0; | |
3079 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3080 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3081 | } else { |
3082 | s->s3->tmp.cert_req = 2; | |
124037fd | 3083 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3084 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3085 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3086 | return 0; |
3087 | } | |
0f113f3e MC |
3088 | } |
3089 | } | |
3090 | ||
b9908bf9 | 3091 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3092 | } |
3093 | ||
b9908bf9 MC |
3094 | /* Shouldn't ever get here */ |
3095 | return WORK_ERROR; | |
3096 | } | |
3097 | ||
7cea05dc | 3098 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3099 | { |
0baed5e9 | 3100 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3101 | |
3102 | /* | |
3103 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3104 | * later | |
3105 | */ | |
3106 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3107 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3108 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3109 | : s->cert->key, |
3110 | &al)) { | |
b9908bf9 | 3111 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3112 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3113 | return 0; |
0f113f3e | 3114 | } |
b9908bf9 MC |
3115 | |
3116 | return 1; | |
0f113f3e MC |
3117 | } |
3118 | ||
3119 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3120 | |
36d16f8e | 3121 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3122 | { |
60f43e9e RL |
3123 | int i; |
3124 | #ifndef OPENSSL_NO_EC | |
3125 | int idx; | |
3126 | #endif | |
0f113f3e MC |
3127 | long alg_k, alg_a; |
3128 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3129 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3130 | |
0f113f3e MC |
3131 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3132 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3133 | |
0f113f3e | 3134 | /* we don't have a certificate */ |
55a9a16f | 3135 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3136 | return (1); |
d02b48c6 | 3137 | |
0f113f3e | 3138 | /* This is the passed certificate */ |
d02b48c6 | 3139 | |
10bf4fc2 | 3140 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3141 | idx = s->session->peer_type; |
0f113f3e | 3142 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3143 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3144 | /* check failed */ |
3145 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3146 | goto f_err; | |
3147 | } else { | |
3148 | return 1; | |
3149 | } | |
3150 | } else if (alg_a & SSL_aECDSA) { | |
3151 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3152 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3153 | goto f_err; | |
0f113f3e MC |
3154 | } |
3155 | #endif | |
8382fd3a | 3156 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3157 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3158 | |
3159 | /* Check that we have a certificate if we require one */ | |
3160 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3161 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3162 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3163 | goto f_err; | |
3164 | } | |
bc36ee62 | 3165 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3166 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3167 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3168 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3169 | goto f_err; | |
3170 | } | |
d02b48c6 | 3171 | #endif |
bc36ee62 | 3172 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3173 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3174 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3175 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3176 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3177 | goto f_err; | |
0f113f3e | 3178 | } |
79df9d62 | 3179 | #endif |
bc36ee62 | 3180 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3181 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3182 | al = SSL_AD_INTERNAL_ERROR; |
3183 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3184 | goto f_err; |
0f113f3e | 3185 | } |
d02b48c6 RE |
3186 | #endif |
3187 | ||
0f113f3e MC |
3188 | return (1); |
3189 | f_err: | |
26c79d56 | 3190 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3191 | return (0); |
3192 | } | |
3193 | ||
e481f9b9 | 3194 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3195 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3196 | { |
15e6be6c MC |
3197 | size_t len, padding_len; |
3198 | unsigned char *padding = NULL; | |
15e6be6c | 3199 | |
aff8c126 | 3200 | len = s->ext.npn_len; |
b9908bf9 | 3201 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3202 | |
aff8c126 | 3203 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3204 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3205 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3206 | goto err; | |
3207 | } | |
3208 | ||
3209 | memset(padding, 0, padding_len); | |
3210 | ||
b9908bf9 | 3211 | return 1; |
15e6be6c | 3212 | err: |
15e6be6c MC |
3213 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3214 | return 0; | |
b9908bf9 | 3215 | } |
6434abbf | 3216 | #endif |
368888bc | 3217 | |
c7f47786 MC |
3218 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3219 | { | |
3220 | if (PACKET_remaining(pkt) > 0) { | |
3221 | /* should contain no data */ | |
3222 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3223 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3224 | ossl_statem_set_error(s); | |
3225 | return MSG_PROCESS_ERROR; | |
3226 | } | |
3227 | ||
3228 | /* | |
3229 | * This is a historical discrepancy maintained for compatibility | |
3230 | * reasons. If a TLS client receives a HelloRequest it will attempt | |
3231 | * an abbreviated handshake. However if a DTLS client receives a | |
3232 | * HelloRequest it will do a full handshake. | |
3233 | */ | |
3234 | if (SSL_IS_DTLS(s)) | |
3235 | SSL_renegotiate(s); | |
3236 | else | |
3237 | SSL_renegotiate_abbreviated(s); | |
3238 | ||
3239 | return MSG_PROCESS_FINISHED_READING; | |
3240 | } | |
3241 | ||
e46f2334 MC |
3242 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3243 | { | |
3244 | int al = SSL_AD_INTERNAL_ERROR; | |
3245 | PACKET extensions; | |
3434f40b | 3246 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3247 | |
e46f2334 MC |
3248 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3249 | al = SSL_AD_DECODE_ERROR; | |
3250 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3251 | goto err; | |
3252 | } | |
3253 | ||
e96e0f8e | 3254 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
1266eefd | 3255 | &rawexts, &al) |
e96e0f8e | 3256 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3257 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3258 | goto err; |
3259 | ||
1b0286a3 | 3260 | OPENSSL_free(rawexts); |
e46f2334 MC |
3261 | return MSG_PROCESS_CONTINUE_READING; |
3262 | ||
3263 | err: | |
3264 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3265 | ossl_statem_set_error(s); | |
1b0286a3 | 3266 | OPENSSL_free(rawexts); |
e46f2334 MC |
3267 | return MSG_PROCESS_ERROR; |
3268 | } | |
3269 | ||
368888bc | 3270 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3271 | { |
3272 | int i = 0; | |
368888bc | 3273 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3274 | if (s->ctx->client_cert_engine) { |
3275 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3276 | SSL_get_client_CA_list(s), | |
3277 | px509, ppkey, NULL, NULL, NULL); | |
3278 | if (i != 0) | |
3279 | return i; | |
3280 | } | |
3281 | #endif | |
3282 | if (s->ctx->client_cert_cb) | |
3283 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3284 | return i; | |
3285 | } | |
d45ba43d | 3286 | |
ae2f7b37 | 3287 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3288 | { |
2c7b4dbc MC |
3289 | int i; |
3290 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3291 | int empty_reneg_info_scsv = !s->renegotiate; |
3292 | /* Set disabled masks for this session */ | |
3293 | ssl_set_client_disabled(s); | |
3294 | ||
3295 | if (sk == NULL) | |
3296 | return (0); | |
d45ba43d | 3297 | |
2c7b4dbc MC |
3298 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3299 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3300 | # error Max cipher length too short | |
3301 | # endif | |
3302 | /* | |
3303 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3304 | * chop number of supported ciphers to keep it well below this if we | |
3305 | * use TLS v1.2 | |
3306 | */ | |
3307 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3308 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3309 | else | |
3310 | #endif | |
3311 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3312 | maxlen = 0xfffe; | |
3313 | ||
3314 | if (empty_reneg_info_scsv) | |
3315 | maxlen -= 2; | |
3316 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3317 | maxlen -= 2; | |
3318 | ||
3319 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3320 | const SSL_CIPHER *c; | |
3321 | ||
d45ba43d MC |
3322 | c = sk_SSL_CIPHER_value(sk, i); |
3323 | /* Skip disabled ciphers */ | |
3324 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3325 | continue; | |
2c7b4dbc MC |
3326 | |
3327 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3328 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3329 | return 0; | |
3330 | } | |
3331 | ||
3332 | totlen += len; | |
d45ba43d | 3333 | } |
2c7b4dbc MC |
3334 | |
3335 | if (totlen == 0) { | |
3336 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3337 | return 0; | |
3338 | } | |
3339 | ||
3340 | if (totlen != 0) { | |
d45ba43d MC |
3341 | if (empty_reneg_info_scsv) { |
3342 | static SSL_CIPHER scsv = { | |
3343 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3344 | }; | |
2c7b4dbc MC |
3345 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3346 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3347 | return 0; | |
3348 | } | |
d45ba43d MC |
3349 | } |
3350 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3351 | static SSL_CIPHER scsv = { | |
3352 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3353 | }; | |
2c7b4dbc MC |
3354 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3355 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3356 | return 0; | |
3357 | } | |
d45ba43d MC |
3358 | } |
3359 | } | |
3360 | ||
2c7b4dbc | 3361 | return 1; |
d45ba43d | 3362 | } |