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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> | |
8ba708e5 | 51 | #include "../ssl_locl.h" |
61ae935a | 52 | #include "statem_locl.h" |
ec577822 BM |
53 | #include <openssl/buffer.h> |
54 | #include <openssl/rand.h> | |
55 | #include <openssl/objects.h> | |
56 | #include <openssl/evp.h> | |
dbad1690 | 57 | #include <openssl/md5.h> |
3c27208f | 58 | #include <openssl/dh.h> |
d095b68d | 59 | #include <openssl/bn.h> |
3c27208f | 60 | #include <openssl/engine.h> |
f9b3bff6 | 61 | |
e46f2334 MC |
62 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
63 | ||
7ab09630 | 64 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 65 | static int key_exchange_expected(SSL *s); |
0f113f3e | 66 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 67 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 68 | WPACKET *pkt); |
ea262260 | 69 | |
61ae935a MC |
70 | /* |
71 | * Is a CertificateRequest message allowed at the moment or not? | |
72 | * | |
73 | * Return values are: | |
74 | * 1: Yes | |
75 | * 0: No | |
76 | */ | |
7ab09630 | 77 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
78 | { |
79 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 80 | if ((s->version > SSL3_VERSION |
a230b26e EK |
81 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
82 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
83 | return 0; |
84 | ||
85 | return 1; | |
86 | } | |
87 | ||
88 | /* | |
a455d0f6 | 89 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
90 | * |
91 | * Return values are: | |
92 | * 1: Yes | |
93 | * 0: No | |
94 | */ | |
a455d0f6 | 95 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
96 | { |
97 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
98 | ||
99 | /* | |
100 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 101 | * ciphersuite or for SRP |
61ae935a | 102 | */ |
a455d0f6 MC |
103 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
104 | | SSL_kSRP)) { | |
105 | return 1; | |
61ae935a MC |
106 | } |
107 | ||
a455d0f6 | 108 | return 0; |
61ae935a MC |
109 | } |
110 | ||
0f1e51ea MC |
111 | /* |
112 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
113 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
114 | * server. The message type that the server has sent is provided in |mt|. The | |
115 | * current state is in |s->statem.hand_state|. | |
116 | * | |
94ed2c67 MC |
117 | * Return values are 1 for success (transition allowed) and 0 on error |
118 | * (transition not allowed) | |
0f1e51ea MC |
119 | */ |
120 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
121 | { | |
122 | OSSL_STATEM *st = &s->statem; | |
123 | ||
94ed2c67 MC |
124 | /* |
125 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
126 | * we will update this to look more like real TLSv1.3 | |
127 | */ | |
128 | ||
0f1e51ea MC |
129 | /* |
130 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
131 | * yet negotiated TLSv1.3 at that point so that is handled by | |
132 | * ossl_statem_client_read_transition() | |
133 | */ | |
134 | ||
135 | switch (st->hand_state) { | |
136 | default: | |
137 | break; | |
138 | ||
139 | case TLS_ST_CR_SRVR_HELLO: | |
e46f2334 MC |
140 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
141 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
142 | return 1; | |
143 | } | |
144 | break; | |
145 | ||
146 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 147 | if (s->hit) { |
92760c21 MC |
148 | if (mt == SSL3_MT_FINISHED) { |
149 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
150 | return 1; |
151 | } | |
152 | } else { | |
92760c21 MC |
153 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
154 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
155 | return 1; | |
f5ca0b04 MC |
156 | } |
157 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
158 | st->hand_state = TLS_ST_CR_CERT; |
159 | return 1; | |
160 | } | |
161 | } | |
162 | break; | |
163 | ||
92760c21 MC |
164 | case TLS_ST_CR_CERT_REQ: |
165 | if (mt == SSL3_MT_CERTIFICATE) { | |
166 | st->hand_state = TLS_ST_CR_CERT; | |
167 | return 1; | |
168 | } | |
169 | break; | |
170 | ||
0f1e51ea | 171 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
172 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
173 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
174 | return 1; | |
175 | } | |
176 | break; | |
177 | ||
178 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
179 | if (mt == SSL3_MT_FINISHED) { |
180 | st->hand_state = TLS_ST_CR_FINISHED; | |
181 | return 1; | |
182 | } | |
183 | break; | |
cc2455bf MC |
184 | |
185 | case TLS_ST_OK: | |
186 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
187 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
188 | return 1; | |
189 | } | |
190 | break; | |
0f1e51ea MC |
191 | } |
192 | ||
0f1e51ea | 193 | /* No valid transition found */ |
0f1e51ea MC |
194 | return 0; |
195 | } | |
196 | ||
61ae935a | 197 | /* |
8481f583 MC |
198 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
199 | * handshake state transitions when the client is reading messages from the | |
200 | * server. The message type that the server has sent is provided in |mt|. The | |
201 | * current state is in |s->statem.hand_state|. | |
61ae935a | 202 | * |
94ed2c67 MC |
203 | * Return values are 1 for success (transition allowed) and 0 on error |
204 | * (transition not allowed) | |
61ae935a | 205 | */ |
8481f583 | 206 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 207 | { |
d6f1a6e9 | 208 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 209 | int ske_expected; |
61ae935a | 210 | |
0f1e51ea MC |
211 | /* |
212 | * Note that after a ClientHello we don't know what version we are going | |
213 | * to negotiate yet, so we don't take this branch until later | |
214 | */ | |
f5ca0b04 | 215 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
216 | if (!ossl_statem_client13_read_transition(s, mt)) |
217 | goto err; | |
218 | return 1; | |
219 | } | |
0f1e51ea | 220 | |
a230b26e | 221 | switch (st->hand_state) { |
f3b3d7f0 RS |
222 | default: |
223 | break; | |
224 | ||
61ae935a MC |
225 | case TLS_ST_CW_CLNT_HELLO: |
226 | if (mt == SSL3_MT_SERVER_HELLO) { | |
227 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
228 | return 1; | |
229 | } | |
230 | ||
231 | if (SSL_IS_DTLS(s)) { | |
232 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
233 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
234 | return 1; | |
235 | } | |
236 | } | |
237 | break; | |
238 | ||
239 | case TLS_ST_CR_SRVR_HELLO: | |
240 | if (s->hit) { | |
aff8c126 | 241 | if (s->ext.ticket_expected) { |
61ae935a MC |
242 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
243 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
244 | return 1; | |
245 | } | |
246 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
247 | st->hand_state = TLS_ST_CR_CHANGE; | |
248 | return 1; | |
249 | } | |
250 | } else { | |
251 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
252 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
253 | return 1; | |
ad3819c2 | 254 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
255 | && s->ext.session_secret_cb != NULL |
256 | && s->session->ext.tick != NULL | |
a230b26e | 257 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
258 | /* |
259 | * Normally, we can tell if the server is resuming the session | |
260 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
261 | * the next server message after the ServerHello to determine if | |
262 | * the server is resuming. | |
263 | */ | |
264 | s->hit = 1; | |
265 | st->hand_state = TLS_ST_CR_CHANGE; | |
266 | return 1; | |
61ae935a | 267 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 268 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
269 | if (mt == SSL3_MT_CERTIFICATE) { |
270 | st->hand_state = TLS_ST_CR_CERT; | |
271 | return 1; | |
272 | } | |
273 | } else { | |
a455d0f6 | 274 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
275 | /* SKE is optional for some PSK ciphersuites */ |
276 | if (ske_expected | |
a230b26e EK |
277 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
278 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
279 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
280 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
281 | return 1; | |
282 | } | |
283 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
284 | && cert_req_allowed(s)) { |
285 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
286 | return 1; | |
a455d0f6 | 287 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
288 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
289 | return 1; | |
61ae935a MC |
290 | } |
291 | } | |
292 | } | |
293 | break; | |
294 | ||
295 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
296 | /* |
297 | * The CertificateStatus message is optional even if | |
aff8c126 | 298 | * |ext.status_expected| is set |
bb1aaab4 | 299 | */ |
aff8c126 | 300 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
301 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
302 | return 1; | |
a455d0f6 MC |
303 | } |
304 | /* Fall through */ | |
305 | ||
306 | case TLS_ST_CR_CERT_STATUS: | |
307 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 308 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
309 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
310 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
311 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
312 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
313 | return 1; | |
61ae935a | 314 | } |
672f3337 | 315 | goto err; |
61ae935a | 316 | } |
a455d0f6 | 317 | /* Fall through */ |
61ae935a | 318 | |
a455d0f6 MC |
319 | case TLS_ST_CR_KEY_EXCH: |
320 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
321 | if (cert_req_allowed(s)) { | |
61ae935a MC |
322 | st->hand_state = TLS_ST_CR_CERT_REQ; |
323 | return 1; | |
61ae935a | 324 | } |
672f3337 | 325 | goto err; |
61ae935a | 326 | } |
a455d0f6 | 327 | /* Fall through */ |
61ae935a MC |
328 | |
329 | case TLS_ST_CR_CERT_REQ: | |
330 | if (mt == SSL3_MT_SERVER_DONE) { | |
331 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
332 | return 1; | |
333 | } | |
334 | break; | |
335 | ||
336 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 337 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
338 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
339 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
340 | return 1; | |
341 | } | |
61ae935a MC |
342 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
343 | st->hand_state = TLS_ST_CR_CHANGE; | |
344 | return 1; | |
345 | } | |
346 | break; | |
347 | ||
348 | case TLS_ST_CR_SESSION_TICKET: | |
349 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
350 | st->hand_state = TLS_ST_CR_CHANGE; | |
351 | return 1; | |
352 | } | |
353 | break; | |
354 | ||
355 | case TLS_ST_CR_CHANGE: | |
356 | if (mt == SSL3_MT_FINISHED) { | |
357 | st->hand_state = TLS_ST_CR_FINISHED; | |
358 | return 1; | |
359 | } | |
360 | break; | |
c7f47786 MC |
361 | |
362 | case TLS_ST_OK: | |
363 | if (mt == SSL3_MT_HELLO_REQUEST) { | |
364 | st->hand_state = TLS_ST_CR_HELLO_REQ; | |
365 | return 1; | |
366 | } | |
367 | break; | |
61ae935a MC |
368 | } |
369 | ||
672f3337 | 370 | err: |
61ae935a | 371 | /* No valid transition found */ |
672f3337 | 372 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 373 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
374 | return 0; |
375 | } | |
376 | ||
377 | /* | |
0f1e51ea MC |
378 | * ossl_statem_client13_write_transition() works out what handshake state to |
379 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
380 | * server. | |
0f1e51ea MC |
381 | */ |
382 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
383 | { | |
384 | OSSL_STATEM *st = &s->statem; | |
385 | ||
94ed2c67 MC |
386 | /* |
387 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
388 | * we will update this to look more like real TLSv1.3 | |
389 | */ | |
390 | ||
0f1e51ea MC |
391 | /* |
392 | * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO, | |
393 | * because we haven't negotiated TLSv1.3 yet at that point. They are | |
394 | * handled by ossl_statem_client_write_transition(). | |
395 | */ | |
396 | switch (st->hand_state) { | |
397 | default: | |
398 | /* Shouldn't happen */ | |
399 | return WRITE_TRAN_ERROR; | |
400 | ||
92760c21 | 401 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 402 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 403 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
404 | return WRITE_TRAN_CONTINUE; |
405 | ||
406 | case TLS_ST_CW_CERT: | |
407 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 408 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 409 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
410 | return WRITE_TRAN_CONTINUE; |
411 | ||
412 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
413 | st->hand_state = TLS_ST_CW_FINISHED; |
414 | return WRITE_TRAN_CONTINUE; | |
415 | ||
cc2455bf | 416 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 417 | case TLS_ST_CW_FINISHED: |
94ed2c67 MC |
418 | st->hand_state = TLS_ST_OK; |
419 | ossl_statem_set_in_init(s, 0); | |
420 | return WRITE_TRAN_CONTINUE; | |
cc2455bf MC |
421 | |
422 | case TLS_ST_OK: | |
423 | /* Just go straight to trying to read from the server */ | |
424 | return WRITE_TRAN_FINISHED; | |
0f1e51ea MC |
425 | } |
426 | } | |
427 | ||
428 | /* | |
429 | * ossl_statem_client_write_transition() works out what handshake state to | |
430 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 431 | */ |
8481f583 | 432 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 433 | { |
d6f1a6e9 | 434 | OSSL_STATEM *st = &s->statem; |
61ae935a | 435 | |
0f1e51ea MC |
436 | /* |
437 | * Note that immediately before/after a ClientHello we don't know what | |
438 | * version we are going to negotiate yet, so we don't take this branch until | |
439 | * later | |
440 | */ | |
f5ca0b04 | 441 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
442 | return ossl_statem_client13_write_transition(s); |
443 | ||
a230b26e | 444 | switch (st->hand_state) { |
f3b3d7f0 RS |
445 | default: |
446 | /* Shouldn't happen */ | |
447 | return WRITE_TRAN_ERROR; | |
448 | ||
a230b26e | 449 | case TLS_ST_OK: |
c7f47786 MC |
450 | if (!s->renegotiate) { |
451 | /* | |
452 | * We haven't requested a renegotiation ourselves so we must have | |
453 | * received a message from the server. Better read it. | |
454 | */ | |
455 | return WRITE_TRAN_FINISHED; | |
456 | } | |
a230b26e EK |
457 | /* Renegotiation - fall through */ |
458 | case TLS_ST_BEFORE: | |
459 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
460 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 461 | |
a230b26e EK |
462 | case TLS_ST_CW_CLNT_HELLO: |
463 | /* | |
464 | * No transition at the end of writing because we don't know what | |
465 | * we will be sent | |
466 | */ | |
467 | return WRITE_TRAN_FINISHED; | |
61ae935a | 468 | |
a230b26e EK |
469 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
470 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
471 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 472 | |
a230b26e EK |
473 | case TLS_ST_CR_SRVR_DONE: |
474 | if (s->s3->tmp.cert_req) | |
475 | st->hand_state = TLS_ST_CW_CERT; | |
476 | else | |
61ae935a | 477 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 478 | return WRITE_TRAN_CONTINUE; |
61ae935a | 479 | |
a230b26e EK |
480 | case TLS_ST_CW_CERT: |
481 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
482 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 483 | |
a230b26e EK |
484 | case TLS_ST_CW_KEY_EXCH: |
485 | /* | |
486 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
487 | * sent, but no verify packet is sent | |
488 | */ | |
489 | /* | |
490 | * XXX: For now, we do not support client authentication in ECDH | |
491 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
492 | * need to skip the certificate verify message when client's | |
493 | * ECDH public key is sent inside the client certificate. | |
494 | */ | |
495 | if (s->s3->tmp.cert_req == 1) { | |
496 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
497 | } else { | |
61ae935a | 498 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
499 | } |
500 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
501 | st->hand_state = TLS_ST_CW_CHANGE; | |
502 | } | |
503 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 504 | |
a230b26e EK |
505 | case TLS_ST_CW_CERT_VRFY: |
506 | st->hand_state = TLS_ST_CW_CHANGE; | |
507 | return WRITE_TRAN_CONTINUE; | |
508 | ||
509 | case TLS_ST_CW_CHANGE: | |
61ae935a | 510 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 511 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 512 | #else |
aff8c126 | 513 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
514 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
515 | else | |
516 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 517 | #endif |
a230b26e | 518 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
519 | |
520 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
521 | case TLS_ST_CW_NEXT_PROTO: |
522 | st->hand_state = TLS_ST_CW_FINISHED; | |
523 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
524 | #endif |
525 | ||
a230b26e EK |
526 | case TLS_ST_CW_FINISHED: |
527 | if (s->hit) { | |
528 | st->hand_state = TLS_ST_OK; | |
529 | ossl_statem_set_in_init(s, 0); | |
530 | return WRITE_TRAN_CONTINUE; | |
531 | } else { | |
532 | return WRITE_TRAN_FINISHED; | |
533 | } | |
61ae935a | 534 | |
a230b26e EK |
535 | case TLS_ST_CR_FINISHED: |
536 | if (s->hit) { | |
537 | st->hand_state = TLS_ST_CW_CHANGE; | |
538 | return WRITE_TRAN_CONTINUE; | |
539 | } else { | |
540 | st->hand_state = TLS_ST_OK; | |
541 | ossl_statem_set_in_init(s, 0); | |
542 | return WRITE_TRAN_CONTINUE; | |
543 | } | |
c7f47786 MC |
544 | |
545 | case TLS_ST_CR_HELLO_REQ: | |
546 | /* | |
547 | * If we can renegotiate now then do so, otherwise wait for a more | |
548 | * convenient time. | |
549 | */ | |
550 | if (ssl3_renegotiate_check(s, 1)) { | |
551 | if (!tls_setup_handshake(s)) { | |
552 | ossl_statem_set_error(s); | |
553 | return WRITE_TRAN_ERROR; | |
554 | } | |
555 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
556 | return WRITE_TRAN_CONTINUE; | |
557 | } | |
558 | st->hand_state = TLS_ST_OK; | |
559 | ossl_statem_set_in_init(s, 0); | |
560 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
561 | } |
562 | } | |
563 | ||
564 | /* | |
565 | * Perform any pre work that needs to be done prior to sending a message from | |
566 | * the client to the server. | |
567 | */ | |
8481f583 | 568 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 569 | { |
d6f1a6e9 | 570 | OSSL_STATEM *st = &s->statem; |
61ae935a | 571 | |
a230b26e | 572 | switch (st->hand_state) { |
f3b3d7f0 RS |
573 | default: |
574 | /* No pre work to be done */ | |
575 | break; | |
576 | ||
61ae935a MC |
577 | case TLS_ST_CW_CLNT_HELLO: |
578 | s->shutdown = 0; | |
579 | if (SSL_IS_DTLS(s)) { | |
580 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
581 | if (!ssl3_init_finished_mac(s)) { |
582 | ossl_statem_set_error(s); | |
583 | return WORK_ERROR; | |
584 | } | |
61ae935a MC |
585 | } |
586 | break; | |
587 | ||
61ae935a MC |
588 | case TLS_ST_CW_CHANGE: |
589 | if (SSL_IS_DTLS(s)) { | |
590 | if (s->hit) { | |
591 | /* | |
592 | * We're into the last flight so we don't retransmit these | |
593 | * messages unless we need to. | |
594 | */ | |
595 | st->use_timer = 0; | |
596 | } | |
597 | #ifndef OPENSSL_NO_SCTP | |
598 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
599 | return dtls_wait_for_dry(s); | |
600 | #endif | |
601 | } | |
f3b3d7f0 | 602 | break; |
61ae935a MC |
603 | |
604 | case TLS_ST_OK: | |
30f05b19 | 605 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
606 | } |
607 | ||
608 | return WORK_FINISHED_CONTINUE; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Perform any work that needs to be done after sending a message from the | |
613 | * client to the server. | |
2c5dfdc3 MC |
614 | case TLS_ST_SR_CERT_VRFY: |
615 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 616 | */ |
8481f583 | 617 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 618 | { |
d6f1a6e9 | 619 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
620 | |
621 | s->init_num = 0; | |
622 | ||
a230b26e | 623 | switch (st->hand_state) { |
f3b3d7f0 RS |
624 | default: |
625 | /* No post work to be done */ | |
626 | break; | |
627 | ||
61ae935a | 628 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 629 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 630 | return WORK_MORE_A; |
46417569 | 631 | |
61ae935a MC |
632 | if (SSL_IS_DTLS(s)) { |
633 | /* Treat the next message as the first packet */ | |
634 | s->first_packet = 1; | |
635 | } | |
636 | break; | |
637 | ||
638 | case TLS_ST_CW_KEY_EXCH: | |
639 | if (tls_client_key_exchange_post_work(s) == 0) | |
640 | return WORK_ERROR; | |
641 | break; | |
642 | ||
643 | case TLS_ST_CW_CHANGE: | |
644 | s->session->cipher = s->s3->tmp.new_cipher; | |
645 | #ifdef OPENSSL_NO_COMP | |
646 | s->session->compress_meth = 0; | |
647 | #else | |
648 | if (s->s3->tmp.new_compression == NULL) | |
649 | s->session->compress_meth = 0; | |
650 | else | |
651 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
652 | #endif | |
653 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
654 | return WORK_ERROR; | |
655 | ||
656 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
657 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
658 | return WORK_ERROR; | |
659 | ||
660 | if (SSL_IS_DTLS(s)) { | |
661 | #ifndef OPENSSL_NO_SCTP | |
662 | if (s->hit) { | |
663 | /* | |
664 | * Change to new shared key of SCTP-Auth, will be ignored if | |
665 | * no SCTP used. | |
666 | */ | |
667 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
668 | 0, NULL); | |
669 | } | |
670 | #endif | |
671 | ||
672 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
673 | } | |
674 | break; | |
675 | ||
676 | case TLS_ST_CW_FINISHED: | |
677 | #ifndef OPENSSL_NO_SCTP | |
678 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
679 | /* | |
680 | * Change to new shared key of SCTP-Auth, will be ignored if | |
681 | * no SCTP used. | |
682 | */ | |
683 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
684 | 0, NULL); | |
685 | } | |
686 | #endif | |
687 | if (statem_flush(s) != 1) | |
688 | return WORK_MORE_B; | |
92760c21 MC |
689 | |
690 | if (SSL_IS_TLS13(s)) { | |
691 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
692 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
693 | return WORK_ERROR; | |
694 | } | |
61ae935a | 695 | break; |
61ae935a MC |
696 | } |
697 | ||
698 | return WORK_FINISHED_CONTINUE; | |
699 | } | |
700 | ||
701 | /* | |
6392fb8e MC |
702 | * Get the message construction function and message type for sending from the |
703 | * client | |
61ae935a MC |
704 | * |
705 | * Valid return values are: | |
706 | * 1: Success | |
707 | * 0: Error | |
708 | */ | |
6392fb8e | 709 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 710 | confunc_f *confunc, int *mt) |
61ae935a | 711 | { |
d6f1a6e9 | 712 | OSSL_STATEM *st = &s->statem; |
61ae935a | 713 | |
4a01c59f MC |
714 | switch (st->hand_state) { |
715 | default: | |
716 | /* Shouldn't happen */ | |
717 | return 0; | |
718 | ||
719 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 720 | if (SSL_IS_DTLS(s)) |
6392fb8e | 721 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 722 | else |
6392fb8e MC |
723 | *confunc = tls_construct_change_cipher_spec; |
724 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
725 | break; |
726 | ||
727 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
728 | *confunc = tls_construct_client_hello; |
729 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
730 | break; |
731 | ||
732 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
733 | *confunc = tls_construct_client_certificate; |
734 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
735 | break; |
736 | ||
737 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
738 | *confunc = tls_construct_client_key_exchange; |
739 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
740 | break; |
741 | ||
742 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 743 | *confunc = tls_construct_cert_verify; |
6392fb8e | 744 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 745 | break; |
61ae935a MC |
746 | |
747 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 748 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
749 | *confunc = tls_construct_next_proto; |
750 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 751 | break; |
61ae935a | 752 | #endif |
4a01c59f | 753 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
754 | *confunc = tls_construct_finished; |
755 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
756 | break; |
757 | } | |
5923ad4b | 758 | |
5923ad4b | 759 | return 1; |
61ae935a MC |
760 | } |
761 | ||
762 | /* | |
763 | * Returns the maximum allowed length for the current message that we are | |
764 | * reading. Excludes the message header. | |
765 | */ | |
eda75751 | 766 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 767 | { |
d6f1a6e9 | 768 | OSSL_STATEM *st = &s->statem; |
61ae935a | 769 | |
a230b26e | 770 | switch (st->hand_state) { |
f3b3d7f0 RS |
771 | default: |
772 | /* Shouldn't happen */ | |
773 | return 0; | |
774 | ||
a230b26e EK |
775 | case TLS_ST_CR_SRVR_HELLO: |
776 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 777 | |
a230b26e EK |
778 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
779 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 780 | |
a230b26e EK |
781 | case TLS_ST_CR_CERT: |
782 | return s->max_cert_list; | |
61ae935a | 783 | |
2c5dfdc3 MC |
784 | case TLS_ST_CR_CERT_VRFY: |
785 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
786 | ||
a230b26e EK |
787 | case TLS_ST_CR_CERT_STATUS: |
788 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 789 | |
a230b26e EK |
790 | case TLS_ST_CR_KEY_EXCH: |
791 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 792 | |
a230b26e EK |
793 | case TLS_ST_CR_CERT_REQ: |
794 | /* | |
795 | * Set to s->max_cert_list for compatibility with previous releases. In | |
796 | * practice these messages can get quite long if servers are configured | |
797 | * to provide a long list of acceptable CAs | |
798 | */ | |
799 | return s->max_cert_list; | |
61ae935a | 800 | |
a230b26e EK |
801 | case TLS_ST_CR_SRVR_DONE: |
802 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 803 | |
a230b26e EK |
804 | case TLS_ST_CR_CHANGE: |
805 | if (s->version == DTLS1_BAD_VER) | |
806 | return 3; | |
807 | return CCS_MAX_LENGTH; | |
61ae935a | 808 | |
a230b26e EK |
809 | case TLS_ST_CR_SESSION_TICKET: |
810 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 811 | |
a230b26e EK |
812 | case TLS_ST_CR_FINISHED: |
813 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
814 | |
815 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
816 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
61ae935a | 817 | } |
61ae935a MC |
818 | } |
819 | ||
820 | /* | |
821 | * Process a message that the client has been received from the server. | |
822 | */ | |
8481f583 | 823 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 824 | { |
d6f1a6e9 | 825 | OSSL_STATEM *st = &s->statem; |
61ae935a | 826 | |
a230b26e | 827 | switch (st->hand_state) { |
f3b3d7f0 RS |
828 | default: |
829 | /* Shouldn't happen */ | |
830 | return MSG_PROCESS_ERROR; | |
831 | ||
a230b26e EK |
832 | case TLS_ST_CR_SRVR_HELLO: |
833 | return tls_process_server_hello(s, pkt); | |
61ae935a | 834 | |
a230b26e EK |
835 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
836 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 837 | |
a230b26e EK |
838 | case TLS_ST_CR_CERT: |
839 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 840 | |
2c5dfdc3 MC |
841 | case TLS_ST_CR_CERT_VRFY: |
842 | return tls_process_cert_verify(s, pkt); | |
843 | ||
a230b26e EK |
844 | case TLS_ST_CR_CERT_STATUS: |
845 | return tls_process_cert_status(s, pkt); | |
61ae935a | 846 | |
a230b26e EK |
847 | case TLS_ST_CR_KEY_EXCH: |
848 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 849 | |
a230b26e EK |
850 | case TLS_ST_CR_CERT_REQ: |
851 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 852 | |
a230b26e EK |
853 | case TLS_ST_CR_SRVR_DONE: |
854 | return tls_process_server_done(s, pkt); | |
61ae935a | 855 | |
a230b26e EK |
856 | case TLS_ST_CR_CHANGE: |
857 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 858 | |
a230b26e | 859 | case TLS_ST_CR_SESSION_TICKET: |
cc2455bf MC |
860 | if (SSL_IS_TLS13(s)) |
861 | return tls13_process_new_session_ticket(s, pkt); | |
a230b26e | 862 | return tls_process_new_session_ticket(s, pkt); |
61ae935a | 863 | |
a230b26e EK |
864 | case TLS_ST_CR_FINISHED: |
865 | return tls_process_finished(s, pkt); | |
e46f2334 | 866 | |
c7f47786 MC |
867 | case TLS_ST_CR_HELLO_REQ: |
868 | return tls_process_hello_req(s, pkt); | |
869 | ||
e46f2334 MC |
870 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
871 | return tls_process_encrypted_extensions(s, pkt); | |
61ae935a | 872 | } |
61ae935a MC |
873 | } |
874 | ||
875 | /* | |
876 | * Perform any further processing required following the receipt of a message | |
877 | * from the server | |
878 | */ | |
8481f583 | 879 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 880 | { |
d6f1a6e9 | 881 | OSSL_STATEM *st = &s->statem; |
61ae935a | 882 | |
a230b26e | 883 | switch (st->hand_state) { |
f3b3d7f0 RS |
884 | default: |
885 | /* Shouldn't happen */ | |
886 | return WORK_ERROR; | |
887 | ||
05c4f1d5 MC |
888 | case TLS_ST_CR_CERT_REQ: |
889 | return tls_prepare_client_certificate(s, wst); | |
890 | ||
61ae935a MC |
891 | #ifndef OPENSSL_NO_SCTP |
892 | case TLS_ST_CR_SRVR_DONE: | |
893 | /* We only get here if we are using SCTP and we are renegotiating */ | |
894 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
895 | s->s3->in_read_app_data = 2; | |
896 | s->rwstate = SSL_READING; | |
897 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
898 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 899 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
900 | return WORK_MORE_A; |
901 | } | |
fe3a3291 | 902 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
903 | return WORK_FINISHED_STOP; |
904 | #endif | |
61ae935a | 905 | } |
61ae935a MC |
906 | } |
907 | ||
7cea05dc | 908 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 909 | { |
2c7b4dbc | 910 | unsigned char *p; |
ec60ccc1 MC |
911 | size_t sess_id_len; |
912 | int i, protverr; | |
2c7b4dbc | 913 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 914 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
915 | SSL_COMP *comp; |
916 | #endif | |
b9908bf9 | 917 | SSL_SESSION *sess = s->session; |
0f113f3e | 918 | |
7cea05dc | 919 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
920 | /* Should not happen */ |
921 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 922 | return 0; |
2c7b4dbc | 923 | } |
0f113f3e | 924 | |
b9908bf9 | 925 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
926 | protverr = ssl_set_client_hello_version(s); |
927 | if (protverr != 0) { | |
928 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 929 | return 0; |
4fa52141 | 930 | } |
0f113f3e | 931 | |
a230b26e | 932 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 933 | /* |
b9908bf9 MC |
934 | * In the case of EAP-FAST, we can have a pre-shared |
935 | * "ticket" without a session ID. | |
0f113f3e | 936 | */ |
aff8c126 | 937 | (!sess->session_id_length && !sess->ext.tick) || |
b9908bf9 MC |
938 | (sess->not_resumable)) { |
939 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 940 | return 0; |
b9908bf9 MC |
941 | } |
942 | /* else use the pre-loaded session */ | |
0f113f3e | 943 | |
c7f47786 MC |
944 | /* This is a real handshake so make sure we clean it up at the end */ |
945 | s->statem.cleanuphand = 1; | |
946 | ||
b9908bf9 | 947 | p = s->s3->client_random; |
0f113f3e | 948 | |
b9908bf9 MC |
949 | /* |
950 | * for DTLS if client_random is initialized, reuse it, we are | |
951 | * required to use same upon reply to HelloVerify | |
952 | */ | |
953 | if (SSL_IS_DTLS(s)) { | |
954 | size_t idx; | |
955 | i = 1; | |
956 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
957 | if (p[idx]) { | |
958 | i = 0; | |
959 | break; | |
0f113f3e | 960 | } |
0f113f3e | 961 | } |
b9908bf9 MC |
962 | } else |
963 | i = 1; | |
0f113f3e | 964 | |
a230b26e | 965 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 966 | return 0; |
b9908bf9 | 967 | |
b9908bf9 MC |
968 | /*- |
969 | * version indicates the negotiated version: for example from | |
970 | * an SSLv2/v3 compatible client hello). The client_version | |
971 | * field is the maximum version we permit and it is also | |
972 | * used in RSA encrypted premaster secrets. Some servers can | |
973 | * choke if we initially report a higher version then | |
974 | * renegotiate to a lower one in the premaster secret. This | |
975 | * didn't happen with TLS 1.0 as most servers supported it | |
976 | * but it can with TLS 1.1 or later if the server only supports | |
977 | * 1.0. | |
978 | * | |
979 | * Possible scenario with previous logic: | |
980 | * 1. Client hello indicates TLS 1.2 | |
981 | * 2. Server hello says TLS 1.0 | |
982 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 983 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
984 | * 5. Server sends hello request to renegotiate. |
985 | * 6. Client hello indicates TLS v1.0 as we now | |
986 | * know that is maximum server supports. | |
987 | * 7. Server chokes on RSA encrypted premaster secret | |
988 | * containing version 1.0. | |
989 | * | |
990 | * For interoperability it should be OK to always use the | |
991 | * maximum version we support in client hello and then rely | |
992 | * on the checking of version to ensure the servers isn't | |
993 | * being inconsistent: for example initially negotiating with | |
994 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
995 | * client_version in client hello and not resetting it to | |
996 | * the negotiated version. | |
cd998837 MC |
997 | * |
998 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 999 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1000 | */ |
7acb8b64 | 1001 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1002 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1003 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1004 | return 0; |
2c7b4dbc | 1005 | } |
b9908bf9 MC |
1006 | |
1007 | /* Session ID */ | |
1008 | if (s->new_session) | |
ec60ccc1 | 1009 | sess_id_len = 0; |
b9908bf9 | 1010 | else |
ec60ccc1 MC |
1011 | sess_id_len = s->session->session_id_length; |
1012 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1013 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1014 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1015 | sess_id_len)) | |
7cea05dc | 1016 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1017 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1018 | return 0; |
b9908bf9 | 1019 | } |
0f113f3e | 1020 | |
b9908bf9 MC |
1021 | /* cookie stuff for DTLS */ |
1022 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1023 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1024 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1025 | s->d1->cookie_len)) { |
b9908bf9 | 1026 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1027 | return 0; |
0f113f3e | 1028 | } |
b9908bf9 MC |
1029 | } |
1030 | ||
1031 | /* Ciphers supported */ | |
7cea05dc | 1032 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1033 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1034 | return 0; |
2c7b4dbc MC |
1035 | } |
1036 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1037 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1038 | return 0; | |
1039 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1040 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1041 | return 0; |
b9908bf9 | 1042 | } |
0f113f3e | 1043 | |
b9908bf9 | 1044 | /* COMPRESSION */ |
7cea05dc | 1045 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1046 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1047 | return 0; |
2c7b4dbc MC |
1048 | } |
1049 | #ifndef OPENSSL_NO_COMP | |
1050 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
1051 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1052 | for (i = 0; i < compnum; i++) { | |
1053 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1054 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1055 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1056 | return 0; |
2c7b4dbc MC |
1057 | } |
1058 | } | |
b9908bf9 | 1059 | } |
09b6c2ef | 1060 | #endif |
2c7b4dbc | 1061 | /* Add the NULL method */ |
7cea05dc | 1062 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1063 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1064 | return 0; |
2c7b4dbc | 1065 | } |
761772d7 | 1066 | |
b9908bf9 | 1067 | /* TLS extensions */ |
30aeba43 | 1068 | if (!tls_construct_extensions(s, pkt, EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 MC |
1069 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1070 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1071 | return 0; |
b9908bf9 | 1072 | } |
0f113f3e | 1073 | |
b9908bf9 | 1074 | return 1; |
0f113f3e | 1075 | } |
d02b48c6 | 1076 | |
be3583fa | 1077 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1078 | { |
1079 | int al; | |
cb150cbc | 1080 | size_t cookie_len; |
8ba708e5 MC |
1081 | PACKET cookiepkt; |
1082 | ||
1083 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1084 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1085 | al = SSL_AD_DECODE_ERROR; |
1086 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1087 | goto f_err; | |
1088 | } | |
1089 | ||
1090 | cookie_len = PACKET_remaining(&cookiepkt); | |
1091 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1092 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1093 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1094 | goto f_err; | |
1095 | } | |
1096 | ||
1097 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1098 | al = SSL_AD_DECODE_ERROR; | |
1099 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1100 | goto f_err; | |
1101 | } | |
1102 | s->d1->cookie_len = cookie_len; | |
1103 | ||
1104 | return MSG_PROCESS_FINISHED_READING; | |
1105 | f_err: | |
1106 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1107 | ossl_statem_set_error(s); |
8ba708e5 MC |
1108 | return MSG_PROCESS_ERROR; |
1109 | } | |
1110 | ||
be3583fa | 1111 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1112 | { |
1113 | STACK_OF(SSL_CIPHER) *sk; | |
1114 | const SSL_CIPHER *c; | |
332eb390 | 1115 | PACKET session_id, extpkt; |
b9908bf9 | 1116 | size_t session_id_len; |
b6981744 | 1117 | const unsigned char *cipherchars; |
b9908bf9 MC |
1118 | int i, al = SSL_AD_INTERNAL_ERROR; |
1119 | unsigned int compression; | |
4fa52141 | 1120 | unsigned int sversion; |
3434f40b | 1121 | unsigned int context; |
4fa52141 | 1122 | int protverr; |
332eb390 | 1123 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1124 | #ifndef OPENSSL_NO_COMP |
1125 | SSL_COMP *comp; | |
1126 | #endif | |
1127 | ||
4fa52141 VD |
1128 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1129 | al = SSL_AD_DECODE_ERROR; | |
1130 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1131 | goto f_err; | |
1132 | } | |
50932c4a | 1133 | |
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 MC |
1148 | |
1149 | s->hit = 0; | |
1150 | ||
fc5ce51d | 1151 | /* Get the session-id. */ |
71728dd8 MC |
1152 | if (!SSL_IS_TLS13(s)) { |
1153 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1154 | al = SSL_AD_DECODE_ERROR; | |
1155 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1156 | goto f_err; | |
1157 | } | |
1158 | session_id_len = PACKET_remaining(&session_id); | |
1159 | if (session_id_len > sizeof s->session->session_id | |
1160 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1161 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1162 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1163 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1164 | goto f_err; | |
1165 | } | |
1166 | } else { | |
625b0d51 | 1167 | PACKET_null_init(&session_id); |
71728dd8 | 1168 | session_id_len = 0; |
0f113f3e | 1169 | } |
e481f9b9 | 1170 | |
73999b62 | 1171 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1172 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1173 | al = SSL_AD_DECODE_ERROR; |
1174 | goto f_err; | |
1175 | } | |
1176 | ||
0f113f3e | 1177 | /* |
6e3d0153 EK |
1178 | * Check if we can resume the session based on external pre-shared secret. |
1179 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1180 | * Resumption based on server-side state works with session IDs. | |
1181 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1182 | * works by overriding the SessionTicket extension at the application | |
1183 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1184 | * servers would honour the session ID.) Therefore, the session ID alone | |
1185 | * is not a reliable indicator of session resumption, so we first check if | |
1186 | * we can resume, and later peek at the next handshake message to see if the | |
1187 | * server wants to resume. | |
0f113f3e | 1188 | */ |
71728dd8 | 1189 | if (s->version >= TLS1_VERSION && !SSL_IS_TLS13(s) |
aff8c126 | 1190 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { |
4a640fb6 | 1191 | const SSL_CIPHER *pref_cipher = NULL; |
8c1a5343 MC |
1192 | /* |
1193 | * s->session->master_key_length is a size_t, but this is an int for | |
1194 | * backwards compat reasons | |
1195 | */ | |
1196 | int master_key_length; | |
1197 | master_key_length = sizeof(s->session->master_key); | |
aff8c126 | 1198 | if (s->ext.session_secret_cb(s, s->session->master_key, |
8c1a5343 | 1199 | &master_key_length, |
0f113f3e | 1200 | NULL, &pref_cipher, |
aff8c126 | 1201 | s->ext.session_secret_cb_arg) |
8c1a5343 MC |
1202 | && master_key_length > 0) { |
1203 | s->session->master_key_length = master_key_length; | |
0f113f3e | 1204 | s->session->cipher = pref_cipher ? |
50932c4a | 1205 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1206 | } else { |
b9908bf9 | 1207 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1208 | al = SSL_AD_INTERNAL_ERROR; |
1209 | goto f_err; | |
0f113f3e | 1210 | } |
50932c4a MC |
1211 | } |
1212 | ||
fc5ce51d EK |
1213 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1214 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1215 | session_id_len) == 0) { | |
0f113f3e MC |
1216 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1217 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1218 | /* actually a client application bug */ | |
1219 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1220 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1221 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1222 | goto f_err; | |
1223 | } | |
1224 | s->hit = 1; | |
6e3d0153 | 1225 | } else { |
0f113f3e | 1226 | /* |
6e3d0153 EK |
1227 | * If we were trying for session-id reuse but the server |
1228 | * didn't echo the ID, make a new SSL_SESSION. | |
1229 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1230 | * so the PAC-based session secret is always preserved. It'll be | |
1231 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1232 | */ |
1233 | if (s->session->session_id_length > 0) { | |
4f6eaa59 | 1234 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1235 | if (!ssl_get_new_session(s, 0)) { |
1236 | goto f_err; | |
1237 | } | |
1238 | } | |
50932c4a | 1239 | |
ccae4a15 | 1240 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1241 | s->session->session_id_length = session_id_len; |
1242 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1243 | if (session_id_len > 0) |
1244 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1245 | session_id_len); | |
0f113f3e | 1246 | } |
fc5ce51d | 1247 | |
ccae4a15 FI |
1248 | /* Session version and negotiated protocol version should match */ |
1249 | if (s->version != s->session->ssl_version) { | |
1250 | al = SSL_AD_PROTOCOL_VERSION; | |
1251 | ||
1252 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1253 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1254 | goto f_err; | |
1255 | } | |
1256 | ||
50932c4a | 1257 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1258 | if (c == NULL) { |
1259 | /* unknown cipher */ | |
1260 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1261 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1262 | goto f_err; |
1263 | } | |
0f113f3e | 1264 | /* |
3eb2aff4 KR |
1265 | * Now that we know the version, update the check to see if it's an allowed |
1266 | * version. | |
1267 | */ | |
1268 | s->s3->tmp.min_ver = s->version; | |
1269 | s->s3->tmp.max_ver = s->version; | |
1270 | /* | |
1271 | * If it is a disabled cipher we either didn't send it in client hello, | |
1272 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1273 | */ |
1274 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1275 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1276 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1277 | goto f_err; |
1278 | } | |
0f113f3e MC |
1279 | |
1280 | sk = ssl_get_ciphers_by_id(s); | |
1281 | i = sk_SSL_CIPHER_find(sk, c); | |
1282 | if (i < 0) { | |
1283 | /* we did not say we would use this cipher */ | |
1284 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1285 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1286 | goto f_err; |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * Depending on the session caching (internal/external), the cipher | |
1291 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1292 | * set and use it for comparison. | |
1293 | */ | |
1294 | if (s->session->cipher) | |
1295 | s->session->cipher_id = s->session->cipher->id; | |
1296 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1297 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1298 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1299 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1300 | goto f_err; | |
0f113f3e MC |
1301 | } |
1302 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1303 | /* lets get the compression algorithm */ |
1304 | /* COMPRESSION */ | |
71728dd8 MC |
1305 | if (!SSL_IS_TLS13(s)) { |
1306 | if (!PACKET_get_1(pkt, &compression)) { | |
1307 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1308 | al = SSL_AD_DECODE_ERROR; | |
1309 | goto f_err; | |
1310 | } | |
1311 | } else { | |
1312 | compression = 0; | |
50932c4a | 1313 | } |
71728dd8 | 1314 | |
09b6c2ef | 1315 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1316 | if (compression != 0) { |
0f113f3e | 1317 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1318 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1319 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1320 | goto f_err; | |
1321 | } | |
1322 | /* | |
1323 | * If compression is disabled we'd better not try to resume a session | |
1324 | * using compression. | |
1325 | */ | |
1326 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1327 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1328 | goto f_err; |
1329 | } | |
09b6c2ef | 1330 | #else |
fc5ce51d | 1331 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1332 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1333 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1334 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1335 | goto f_err; | |
1336 | } | |
fc5ce51d | 1337 | if (compression == 0) |
0f113f3e MC |
1338 | comp = NULL; |
1339 | else if (!ssl_allow_compression(s)) { | |
1340 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1341 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1342 | goto f_err; |
fc5ce51d EK |
1343 | } else { |
1344 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1345 | } | |
0f113f3e | 1346 | |
fc5ce51d | 1347 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1348 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1349 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1350 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1351 | goto f_err; | |
1352 | } else { | |
1353 | s->s3->tmp.new_compression = comp; | |
1354 | } | |
09b6c2ef | 1355 | #endif |
761772d7 | 1356 | |
0f113f3e | 1357 | /* TLS extensions */ |
332eb390 MC |
1358 | if (PACKET_remaining(pkt) == 0) { |
1359 | PACKET_null_init(&extpkt); | |
1360 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) { | |
0f113f3e | 1361 | al = SSL_AD_DECODE_ERROR; |
332eb390 | 1362 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); |
0f113f3e MC |
1363 | goto f_err; |
1364 | } | |
332eb390 | 1365 | |
3434f40b MC |
1366 | context = SSL_IS_TLS13(s) ? EXT_TLS1_3_SERVER_HELLO |
1367 | : EXT_TLS1_2_SERVER_HELLO; | |
1368 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al) | |
f97d4c37 | 1369 | || !tls_parse_all_extensions(s, context, extensions, NULL, 0, &al)) |
332eb390 MC |
1370 | goto f_err; |
1371 | ||
8723588e MC |
1372 | #ifndef OPENSSL_NO_SCTP |
1373 | if (SSL_IS_DTLS(s) && s->hit) { | |
1374 | unsigned char sctpauthkey[64]; | |
1375 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1376 | ||
1377 | /* | |
1378 | * Add new shared key for SCTP-Auth, will be ignored if | |
1379 | * no SCTP used. | |
1380 | */ | |
141eb8c6 MC |
1381 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1382 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1383 | |
1384 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1385 | sizeof(sctpauthkey), |
1386 | labelbuffer, | |
1387 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1388 | goto f_err; |
8723588e MC |
1389 | |
1390 | BIO_ctrl(SSL_get_wbio(s), | |
1391 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1392 | sizeof(sctpauthkey), sctpauthkey); | |
1393 | } | |
1394 | #endif | |
1395 | ||
92760c21 MC |
1396 | /* |
1397 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1398 | * we're done with this message | |
1399 | */ | |
1400 | if (SSL_IS_TLS13(s) | |
1401 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1402 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1403 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1404 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1405 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1406 | al = SSL_AD_INTERNAL_ERROR; | |
1407 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1408 | goto f_err; | |
1409 | } | |
1410 | ||
1b0286a3 | 1411 | OPENSSL_free(extensions); |
b9908bf9 | 1412 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1413 | f_err: |
1414 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1415 | ossl_statem_set_error(s); |
1b0286a3 | 1416 | OPENSSL_free(extensions); |
b9908bf9 | 1417 | return MSG_PROCESS_ERROR; |
0f113f3e | 1418 | } |
d02b48c6 | 1419 | |
be3583fa | 1420 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1421 | { |
1422 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1423 | unsigned long cert_list_len, cert_len; | |
1424 | X509 *x = NULL; | |
b6981744 | 1425 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1426 | STACK_OF(X509) *sk = NULL; |
1427 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1428 | size_t chainidx; |
e96e0f8e | 1429 | unsigned int context = 0; |
0f113f3e MC |
1430 | |
1431 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1432 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1433 | goto err; |
0f113f3e MC |
1434 | } |
1435 | ||
e96e0f8e MC |
1436 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1437 | || context != 0 | |
1438 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1439 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1440 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1441 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1442 | goto f_err; |
1443 | } | |
d805a57b | 1444 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1445 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1446 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1447 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1448 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1449 | SSL_R_CERT_LENGTH_MISMATCH); |
1450 | goto f_err; | |
1451 | } | |
1452 | ||
df758a85 MC |
1453 | certstart = certbytes; |
1454 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1455 | if (x == NULL) { |
1456 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1457 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1458 | goto f_err; |
1459 | } | |
df758a85 | 1460 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1461 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1462 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1463 | SSL_R_CERT_LENGTH_MISMATCH); |
1464 | goto f_err; | |
1465 | } | |
e96e0f8e MC |
1466 | |
1467 | if (SSL_IS_TLS13(s)) { | |
1468 | RAW_EXTENSION *rawexts = NULL; | |
1469 | PACKET extensions; | |
1470 | ||
1471 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1472 | al = SSL_AD_DECODE_ERROR; | |
1473 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1474 | goto f_err; | |
1475 | } | |
1476 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, | |
1477 | &rawexts, &al) | |
1478 | || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, | |
5ee289ea MC |
1479 | rawexts, x, chainidx, &al)) { |
1480 | OPENSSL_free(rawexts); | |
e96e0f8e | 1481 | goto f_err; |
5ee289ea MC |
1482 | } |
1483 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1484 | } |
1485 | ||
0f113f3e | 1486 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1487 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1488 | goto err; |
0f113f3e MC |
1489 | } |
1490 | x = NULL; | |
0f113f3e MC |
1491 | } |
1492 | ||
1493 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1494 | /* |
1495 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1496 | * for client side verification of the server certificate to take place. | |
1497 | * However, historically the code has only checked that *any* flag is set | |
1498 | * to cause server verification to take place. Use of the other flags makes | |
1499 | * no sense in client mode. An attempt to clean up the semantics was | |
1500 | * reverted because at least one application *only* set | |
1501 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1502 | * server verification to take place, after the clean up it silently did | |
1503 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1504 | * sent to them because they are void functions. Therefore, we now use the | |
1505 | * (less clean) historic behaviour of performing validation if any flag is | |
1506 | * set. The *documented* interface remains the same. | |
1507 | */ | |
1508 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1509 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1510 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1511 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1512 | goto f_err; | |
1513 | } | |
1514 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1515 | if (i > 1) { | |
b9908bf9 | 1516 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1517 | al = SSL_AD_HANDSHAKE_FAILURE; |
1518 | goto f_err; | |
1519 | } | |
1520 | ||
c34b0f99 | 1521 | s->session->peer_chain = sk; |
0f113f3e MC |
1522 | /* |
1523 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1524 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1525 | */ |
1526 | x = sk_X509_value(sk, 0); | |
1527 | sk = NULL; | |
1528 | /* | |
1529 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1530 | */ | |
1531 | ||
8382fd3a | 1532 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1533 | |
55a9a16f | 1534 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1535 | x = NULL; |
1536 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1537 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1538 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1539 | goto f_err; | |
1540 | } | |
1541 | ||
1542 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1543 | if (i < 0) { |
0f113f3e MC |
1544 | x = NULL; |
1545 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1546 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1547 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1548 | goto f_err; | |
1549 | } | |
1550 | ||
55a9a16f | 1551 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 | 1552 | if (exp_idx >= 0 && i != exp_idx |
a230b26e EK |
1553 | && (exp_idx != SSL_PKEY_GOST_EC || |
1554 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1555 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1556 | x = NULL; |
1557 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1558 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1559 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1560 | goto f_err; | |
0f113f3e | 1561 | } |
a273c6ee | 1562 | s->session->peer_type = i; |
55a9a16f MC |
1563 | |
1564 | X509_free(s->session->peer); | |
05f0fb9f | 1565 | X509_up_ref(x); |
55a9a16f | 1566 | s->session->peer = x; |
0f113f3e | 1567 | s->session->verify_result = s->verify_result; |
0f113f3e | 1568 | x = NULL; |
2c5dfdc3 MC |
1569 | |
1570 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1571 | if (SSL_IS_TLS13(s) | |
1572 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1573 | sizeof(s->cert_verify_hash), | |
1574 | &s->cert_verify_hash_len)) { | |
1575 | al = SSL_AD_INTERNAL_ERROR; | |
1576 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1577 | goto f_err; | |
1578 | } | |
1579 | ||
b9908bf9 | 1580 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1581 | goto done; |
1582 | ||
0f113f3e | 1583 | f_err: |
66696478 | 1584 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1585 | err: |
fe3a3291 | 1586 | ossl_statem_set_error(s); |
66696478 | 1587 | done: |
0f113f3e MC |
1588 | X509_free(x); |
1589 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1590 | return ret; |
0f113f3e | 1591 | } |
d02b48c6 | 1592 | |
7dc1c647 | 1593 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1594 | { |
1595 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1596 | PACKET psk_identity_hint; |
02a74590 | 1597 | |
7dc1c647 MC |
1598 | /* PSK ciphersuites are preceded by an identity hint */ |
1599 | ||
1600 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1601 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1602 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1603 | return 0; |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Store PSK identity hint for later use, hint is used in | |
1608 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1609 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1610 | * identity. | |
1611 | */ | |
1612 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1613 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1614 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1615 | return 0; |
1616 | } | |
02a74590 | 1617 | |
7dc1c647 MC |
1618 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1619 | OPENSSL_free(s->session->psk_identity_hint); | |
1620 | s->session->psk_identity_hint = NULL; | |
1621 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1622 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1623 | *al = SSL_AD_INTERNAL_ERROR; |
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | return 1; | |
1628 | #else | |
4fa88861 | 1629 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1630 | *al = SSL_AD_INTERNAL_ERROR; |
1631 | return 0; | |
02a74590 MC |
1632 | #endif |
1633 | } | |
1634 | ||
25c6c10c MC |
1635 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1636 | { | |
1637 | #ifndef OPENSSL_NO_SRP | |
1638 | PACKET prime, generator, salt, server_pub; | |
1639 | ||
1640 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1641 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1642 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1643 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1644 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1645 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1646 | return 0; |
1647 | } | |
1648 | ||
348240c6 | 1649 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1650 | if ((s->srp_ctx.N = |
1651 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1652 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1653 | || (s->srp_ctx.g = |
1654 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1655 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1656 | || (s->srp_ctx.s = |
1657 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1658 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1659 | || (s->srp_ctx.B = |
1660 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1661 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1662 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1663 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1664 | return 0; |
1665 | } | |
1666 | ||
1667 | if (!srp_verify_server_param(s, al)) { | |
1668 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1669 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1670 | return 0; |
1671 | } | |
1672 | ||
1673 | /* We must check if there is a certificate */ | |
a230b26e | 1674 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1675 | *pkey = X509_get0_pubkey(s->session->peer); |
1676 | ||
1677 | return 1; | |
1678 | #else | |
4fa88861 | 1679 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1680 | *al = SSL_AD_INTERNAL_ERROR; |
1681 | return 0; | |
1682 | #endif | |
1683 | } | |
1684 | ||
e01a610d MC |
1685 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1686 | { | |
1687 | #ifndef OPENSSL_NO_DH | |
1688 | PACKET prime, generator, pub_key; | |
1689 | EVP_PKEY *peer_tmp = NULL; | |
1690 | ||
1691 | DH *dh = NULL; | |
1692 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1693 | ||
26505153 RL |
1694 | int check_bits = 0; |
1695 | ||
e01a610d MC |
1696 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1697 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1698 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1699 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1700 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1701 | return 0; |
1702 | } | |
1703 | ||
1704 | peer_tmp = EVP_PKEY_new(); | |
1705 | dh = DH_new(); | |
1706 | ||
1707 | if (peer_tmp == NULL || dh == NULL) { | |
1708 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1709 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1710 | goto err; |
1711 | } | |
1712 | ||
348240c6 MC |
1713 | /* TODO(size_t): Convert these calls */ |
1714 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1715 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1716 | NULL); | |
1717 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1718 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1719 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1720 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1721 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1722 | goto err; |
1723 | } | |
1724 | ||
26505153 RL |
1725 | /* test non-zero pupkey */ |
1726 | if (BN_is_zero(bnpub_key)) { | |
e01a610d | 1727 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1728 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1729 | goto err; |
1730 | } | |
1731 | ||
1732 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1733 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1734 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1735 | goto err; |
1736 | } | |
1737 | p = g = NULL; | |
1738 | ||
26505153 RL |
1739 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
1740 | *al = SSL_AD_DECODE_ERROR; | |
1741 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); | |
1742 | goto err; | |
1743 | } | |
1744 | ||
e01a610d MC |
1745 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1746 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1747 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1748 | goto err; |
1749 | } | |
1750 | bnpub_key = NULL; | |
1751 | ||
1752 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1753 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1754 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1755 | goto err; |
1756 | } | |
1757 | ||
1758 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1759 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1760 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1761 | goto err; |
1762 | } | |
1763 | ||
1764 | s->s3->peer_tmp = peer_tmp; | |
1765 | ||
1766 | /* | |
1767 | * FIXME: This makes assumptions about which ciphersuites come with | |
1768 | * public keys. We should have a less ad-hoc way of doing this | |
1769 | */ | |
a230b26e | 1770 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1771 | *pkey = X509_get0_pubkey(s->session->peer); |
1772 | /* else anonymous DH, so no certificate or pkey. */ | |
1773 | ||
1774 | return 1; | |
1775 | ||
1776 | err: | |
1777 | BN_free(p); | |
1778 | BN_free(g); | |
1779 | BN_free(bnpub_key); | |
1780 | DH_free(dh); | |
1781 | EVP_PKEY_free(peer_tmp); | |
1782 | ||
1783 | return 0; | |
1784 | #else | |
4fa88861 | 1785 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1786 | *al = SSL_AD_INTERNAL_ERROR; |
1787 | return 0; | |
1788 | #endif | |
1789 | } | |
1790 | ||
ff74aeb1 MC |
1791 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1792 | { | |
1793 | #ifndef OPENSSL_NO_EC | |
1794 | PACKET encoded_pt; | |
1795 | const unsigned char *ecparams; | |
1796 | int curve_nid; | |
ec24630a | 1797 | unsigned int curve_flags; |
ff74aeb1 MC |
1798 | EVP_PKEY_CTX *pctx = NULL; |
1799 | ||
1800 | /* | |
1801 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1802 | * public key. For now we only support named (not generic) curves and | |
1803 | * ECParameters in this case is just three bytes. | |
1804 | */ | |
1805 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1806 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1807 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1808 | return 0; |
1809 | } | |
1810 | /* | |
1811 | * Check curve is one of our preferences, if not server has sent an | |
1812 | * invalid curve. ECParameters is 3 bytes. | |
1813 | */ | |
1814 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1815 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1816 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1817 | return 0; |
1818 | } | |
1819 | ||
ec24630a DSH |
1820 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1821 | ||
a230b26e | 1822 | if (curve_nid == 0) { |
ff74aeb1 | 1823 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1824 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1825 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1826 | return 0; | |
1827 | } | |
1828 | ||
ec24630a DSH |
1829 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1830 | EVP_PKEY *key = EVP_PKEY_new(); | |
1831 | ||
1832 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1833 | *al = SSL_AD_INTERNAL_ERROR; | |
1834 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1835 | EVP_PKEY_free(key); | |
1836 | return 0; | |
1837 | } | |
1838 | s->s3->peer_tmp = key; | |
1839 | } else { | |
1840 | /* Set up EVP_PKEY with named curve as parameters */ | |
1841 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1842 | if (pctx == NULL | |
1843 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1844 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1845 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1846 | *al = SSL_AD_INTERNAL_ERROR; | |
1847 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1848 | EVP_PKEY_CTX_free(pctx); | |
1849 | return 0; | |
1850 | } | |
ff74aeb1 | 1851 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1852 | pctx = NULL; |
ff74aeb1 | 1853 | } |
ff74aeb1 MC |
1854 | |
1855 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1856 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1857 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1858 | return 0; |
1859 | } | |
1860 | ||
ec24630a DSH |
1861 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1862 | PACKET_data(&encoded_pt), | |
1863 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1864 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1865 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1866 | return 0; |
1867 | } | |
1868 | ||
1869 | /* | |
1870 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1871 | * ECParameters in the server key exchange message. We do support RSA | |
1872 | * and ECDSA. | |
1873 | */ | |
1874 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1875 | *pkey = X509_get0_pubkey(s->session->peer); | |
1876 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1877 | *pkey = X509_get0_pubkey(s->session->peer); | |
1878 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1879 | ||
1880 | return 1; | |
1881 | #else | |
4fa88861 | 1882 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1883 | *al = SSL_AD_INTERNAL_ERROR; |
1884 | return 0; | |
1885 | #endif | |
1886 | } | |
1887 | ||
be3583fa | 1888 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1889 | { |
fe3066ee | 1890 | int al = -1, ispss = 0; |
e1e588ac | 1891 | long alg_k; |
b9908bf9 | 1892 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
1893 | EVP_MD_CTX *md_ctx = NULL; |
1894 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 1895 | PACKET save_param_start, signature; |
b9908bf9 | 1896 | |
b9908bf9 MC |
1897 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1898 | ||
73999b62 | 1899 | save_param_start = *pkt; |
8d92c1f8 | 1900 | |
3260adf1 | 1901 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1902 | EVP_PKEY_free(s->s3->peer_tmp); |
1903 | s->s3->peer_tmp = NULL; | |
3260adf1 | 1904 | #endif |
d02b48c6 | 1905 | |
7689082b | 1906 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
1907 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
1908 | goto err; | |
7689082b DSH |
1909 | } |
1910 | ||
1911 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1912 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
1913 | } else if (alg_k & SSL_kSRP) { |
1914 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 1915 | goto err; |
e01a610d MC |
1916 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
1917 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
1918 | goto err; | |
ff74aeb1 MC |
1919 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
1920 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
1921 | goto err; | |
0f113f3e MC |
1922 | } else if (alg_k) { |
1923 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1924 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 1925 | goto err; |
0f113f3e | 1926 | } |
0f113f3e | 1927 | |
0f113f3e MC |
1928 | /* if it was signed, check the signature */ |
1929 | if (pkey != NULL) { | |
32942870 | 1930 | PACKET params; |
be8dba2c MC |
1931 | int maxsig; |
1932 | const EVP_MD *md = NULL; | |
e1e588ac | 1933 | |
32942870 EK |
1934 | /* |
1935 | * |pkt| now points to the beginning of the signature, so the difference | |
1936 | * equals the length of the parameters. | |
1937 | */ | |
1938 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1939 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1940 | PACKET_remaining(pkt))) { |
32942870 | 1941 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1942 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1943 | goto err; |
32942870 EK |
1944 | } |
1945 | ||
0f113f3e | 1946 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 1947 | unsigned int sigalg; |
0f113f3e | 1948 | int rv; |
703bcee0 MC |
1949 | |
1950 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 1951 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1952 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 1953 | goto err; |
0f113f3e | 1954 | } |
703bcee0 | 1955 | rv = tls12_check_peer_sigalg(&md, s, sigalg, pkey); |
e1e588ac MC |
1956 | if (rv == -1) { |
1957 | al = SSL_AD_INTERNAL_ERROR; | |
1958 | goto err; | |
1959 | } else if (rv == 0) { | |
1960 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 1961 | goto err; |
0f113f3e | 1962 | } |
fe3066ee | 1963 | ispss = SIGID_IS_PSS(sigalg); |
a2f9200f | 1964 | #ifdef SSL_DEBUG |
0f113f3e MC |
1965 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1966 | #endif | |
3aeb9348 | 1967 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1968 | md = EVP_md5_sha1(); |
32942870 | 1969 | } else { |
0f113f3e | 1970 | md = EVP_sha1(); |
32942870 | 1971 | } |
0f113f3e | 1972 | |
73999b62 MC |
1973 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1974 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 1975 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1976 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 1977 | goto err; |
0f113f3e | 1978 | } |
be8dba2c MC |
1979 | maxsig = EVP_PKEY_size(pkey); |
1980 | if (maxsig < 0) { | |
e1e588ac | 1981 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1982 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1983 | goto err; |
8098fc56 | 1984 | } |
0f113f3e MC |
1985 | |
1986 | /* | |
8098fc56 | 1987 | * Check signature length |
0f113f3e | 1988 | */ |
be8dba2c | 1989 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 1990 | /* wrong packet length */ |
e1e588ac | 1991 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
1992 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
1993 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
1994 | goto err; |
1995 | } | |
1996 | ||
1997 | md_ctx = EVP_MD_CTX_new(); | |
1998 | if (md_ctx == NULL) { | |
1999 | al = SSL_AD_INTERNAL_ERROR; | |
2000 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2001 | goto err; | |
0f113f3e | 2002 | } |
e1e588ac | 2003 | |
fe3066ee MC |
2004 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2005 | al = SSL_AD_INTERNAL_ERROR; | |
2006 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2007 | goto err; | |
2008 | } | |
2009 | if (ispss) { | |
2010 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 | |
2011 | /* -1 here means set saltlen to the digest len */ | |
2012 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1) <= 0) { | |
2013 | al = SSL_AD_INTERNAL_ERROR; | |
2014 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2015 | goto err; | |
2016 | } | |
2017 | } | |
2018 | if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
2019 | SSL3_RANDOM_SIZE) <= 0 | |
2020 | || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
2021 | SSL3_RANDOM_SIZE) <= 0 | |
2022 | || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms), | |
2023 | PACKET_remaining(¶ms)) <= 0) { | |
192e4bbb DSH |
2024 | al = SSL_AD_INTERNAL_ERROR; |
2025 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 2026 | goto err; |
192e4bbb | 2027 | } |
fe3066ee MC |
2028 | if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature), |
2029 | PACKET_remaining(&signature)) <= 0) { | |
192e4bbb DSH |
2030 | /* bad signature */ |
2031 | al = SSL_AD_DECRYPT_ERROR; | |
2032 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2033 | goto err; |
0f113f3e | 2034 | } |
e1e588ac | 2035 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2036 | md_ctx = NULL; |
0f113f3e | 2037 | } else { |
7689082b | 2038 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2039 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2040 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2041 | /* Might be wrong key type, check it */ |
e1e588ac | 2042 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2043 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2044 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2045 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2046 | } else { |
2047 | al = SSL_AD_DECODE_ERROR; | |
2048 | } | |
0f113f3e MC |
2049 | goto err; |
2050 | } | |
2051 | /* still data left over */ | |
73999b62 | 2052 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2053 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2054 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2055 | goto err; |
0f113f3e MC |
2056 | } |
2057 | } | |
e1e588ac | 2058 | |
b9908bf9 | 2059 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2060 | err: |
7dc1c647 MC |
2061 | if (al != -1) |
2062 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2063 | ossl_statem_set_error(s); |
fe3066ee | 2064 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2065 | return MSG_PROCESS_ERROR; |
0f113f3e | 2066 | } |
d02b48c6 | 2067 | |
be3583fa | 2068 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2069 | { |
2070 | int ret = MSG_PROCESS_ERROR; | |
2071 | unsigned int list_len, ctype_num, i, name_len; | |
2072 | X509_NAME *xn = NULL; | |
b6981744 EK |
2073 | const unsigned char *data; |
2074 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 2075 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
2076 | |
2077 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2078 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2079 | goto err; |
2080 | } | |
2081 | ||
2082 | /* get the certificate types */ | |
73999b62 | 2083 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 2084 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 2085 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2086 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
2087 | goto err; |
2088 | } | |
b548a1f1 RS |
2089 | OPENSSL_free(s->cert->ctypes); |
2090 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2091 | if (ctype_num > SSL3_CT_NUMBER) { |
2092 | /* If we exceed static buffer copy all to cert structure */ | |
2093 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2094 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 2095 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2096 | goto err; |
2097 | } | |
ac112332 | 2098 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 2099 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
2100 | ctype_num = SSL3_CT_NUMBER; |
2101 | } | |
2102 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2103 | s->s3->tmp.ctype[i] = data[i]; |
2104 | ||
0f113f3e | 2105 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 MC |
2106 | PACKET sigalgs; |
2107 | ||
2108 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { | |
0f113f3e | 2109 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2110 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2111 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2112 | goto err; |
2113 | } | |
ac112332 | 2114 | |
0f113f3e MC |
2115 | /* Clear certificate digests and validity flags */ |
2116 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2117 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2118 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2119 | } |
703bcee0 | 2120 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
0f113f3e | 2121 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2122 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2123 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2124 | goto err; | |
2125 | } | |
2126 | if (!tls1_process_sigalgs(s)) { | |
2127 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2128 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2129 | goto err; |
2130 | } | |
a0f63828 DSH |
2131 | } else { |
2132 | ssl_set_default_md(s); | |
0f113f3e MC |
2133 | } |
2134 | ||
2135 | /* get the CA RDNs */ | |
73999b62 | 2136 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2137 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2138 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2139 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2140 | goto err; |
2141 | } | |
2142 | ||
73999b62 MC |
2143 | while (PACKET_remaining(pkt)) { |
2144 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2145 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2146 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2147 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2148 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2149 | goto err; |
2150 | } | |
2151 | ||
ac112332 | 2152 | namestart = namebytes; |
0f113f3e | 2153 | |
ac112332 MC |
2154 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2155 | name_len)) == NULL) { | |
3c33c6f6 | 2156 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2157 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2158 | goto err; |
0f113f3e MC |
2159 | } |
2160 | ||
ac112332 | 2161 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2162 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2163 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2164 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2165 | goto err; | |
2166 | } | |
2167 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2168 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2169 | goto err; |
2170 | } | |
6afef8b1 | 2171 | xn = NULL; |
0f113f3e MC |
2172 | } |
2173 | ||
0f113f3e MC |
2174 | /* we should setup a certificate to return.... */ |
2175 | s->s3->tmp.cert_req = 1; | |
2176 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2177 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2178 | s->s3->tmp.ca_names = ca_sk; |
2179 | ca_sk = NULL; | |
2180 | ||
05c4f1d5 | 2181 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2182 | goto done; |
0f113f3e | 2183 | err: |
fe3a3291 | 2184 | ossl_statem_set_error(s); |
cc273a93 | 2185 | done: |
6afef8b1 | 2186 | X509_NAME_free(xn); |
222561fe | 2187 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2188 | return ret; |
0f113f3e MC |
2189 | } |
2190 | ||
2191 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2192 | { |
0f113f3e | 2193 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2194 | } |
dfeab068 | 2195 | |
be3583fa | 2196 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2197 | { |
2198 | int al; | |
2199 | unsigned int ticklen; | |
2200 | unsigned long ticket_lifetime_hint; | |
ec60ccc1 | 2201 | unsigned int sess_len; |
b9908bf9 | 2202 | |
73999b62 | 2203 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
a230b26e EK |
2204 | || !PACKET_get_net_2(pkt, &ticklen) |
2205 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2206 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2207 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2208 | goto f_err; |
2209 | } | |
2210 | ||
2211 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2212 | if (ticklen == 0) | |
c9de4a20 | 2213 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2214 | |
98ece4ee MC |
2215 | if (s->session->session_id_length > 0) { |
2216 | int i = s->session_ctx->session_cache_mode; | |
2217 | SSL_SESSION *new_sess; | |
2218 | /* | |
2219 | * We reused an existing session, so we need to replace it with a new | |
2220 | * one | |
2221 | */ | |
2222 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2223 | /* | |
e4612d02 | 2224 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2225 | */ |
e4612d02 | 2226 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2227 | } |
2228 | ||
2229 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2230 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2231 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2232 | goto f_err; |
2233 | } | |
2234 | ||
2235 | SSL_SESSION_free(s->session); | |
2236 | s->session = new_sess; | |
2237 | } | |
2238 | ||
aff8c126 RS |
2239 | OPENSSL_free(s->session->ext.tick); |
2240 | s->session->ext.tick = NULL; | |
2241 | s->session->ext.ticklen = 0; | |
e711da71 | 2242 | |
aff8c126 RS |
2243 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2244 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2245 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2246 | goto err; |
2247 | } | |
aff8c126 | 2248 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2249 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2250 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2251 | goto f_err; |
2252 | } | |
e711da71 | 2253 | |
aff8c126 RS |
2254 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
2255 | s->session->ext.ticklen = ticklen; | |
0f113f3e MC |
2256 | /* |
2257 | * There are two ways to detect a resumed ticket session. One is to set | |
2258 | * an appropriate session ID and then the server must return a match in | |
2259 | * ServerHello. This allows the normal client session ID matching to work | |
2260 | * and we know much earlier that the ticket has been accepted. The | |
2261 | * other way is to set zero length session ID when the ticket is | |
2262 | * presented and rely on the handshake to determine session resumption. | |
2263 | * We choose the former approach because this fits in with assumptions | |
2264 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2265 | * SHA256 is disabled) hash of the ticket. | |
2266 | */ | |
ec60ccc1 MC |
2267 | /* |
2268 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2269 | * but s->session->session_id_length is a size_t | |
2270 | */ | |
aff8c126 | 2271 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2272 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2273 | EVP_sha256(), NULL)) { |
2274 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2275 | goto err; | |
2276 | } | |
ec60ccc1 | 2277 | s->session->session_id_length = sess_len; |
b9908bf9 | 2278 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2279 | f_err: |
2280 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2281 | err: | |
fe3a3291 | 2282 | ossl_statem_set_error(s); |
b9908bf9 | 2283 | return MSG_PROCESS_ERROR; |
0f113f3e | 2284 | } |
67c8e7f4 | 2285 | |
cc2455bf MC |
2286 | MSG_PROCESS_RETURN tls13_process_new_session_ticket(SSL *s, PACKET *pkt) |
2287 | { | |
2288 | /* TODO(TLS1.3): For now we just ignore these. This needs implementing */ | |
2289 | return MSG_PROCESS_FINISHED_READING; | |
2290 | } | |
2291 | ||
f63e4288 MC |
2292 | /* |
2293 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2294 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2295 | * |*al| is populated with a suitable alert code. | |
2296 | */ | |
2297 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2298 | { |
8b0e934a | 2299 | size_t resplen; |
b9908bf9 | 2300 | unsigned int type; |
b9908bf9 | 2301 | |
73999b62 | 2302 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2303 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2304 | *al = SSL_AD_DECODE_ERROR; |
2305 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2306 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2307 | return 0; | |
0f113f3e | 2308 | } |
56a26ce3 MC |
2309 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2310 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2311 | *al = SSL_AD_DECODE_ERROR; |
2312 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2313 | return 0; | |
0f113f3e | 2314 | } |
8cbfcc70 RS |
2315 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2316 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2317 | *al = SSL_AD_INTERNAL_ERROR; |
2318 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2319 | return 0; | |
0f113f3e | 2320 | } |
8cbfcc70 | 2321 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2322 | *al = SSL_AD_DECODE_ERROR; |
2323 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2324 | return 0; | |
ac63710a | 2325 | } |
8cbfcc70 | 2326 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2327 | |
2328 | return 1; | |
2329 | } | |
2faa1b48 | 2330 | |
f63e4288 MC |
2331 | |
2332 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2333 | { | |
2334 | int al; | |
2335 | ||
2336 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2337 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2338 | ossl_statem_set_error(s); | |
2339 | return MSG_PROCESS_ERROR; | |
2340 | } | |
2341 | ||
b9908bf9 | 2342 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2343 | } |
d02b48c6 | 2344 | |
7776a36c MC |
2345 | /* |
2346 | * Perform miscellaneous checks and processing after we have received the | |
2347 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2348 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2349 | * on failure. | |
7776a36c MC |
2350 | */ |
2351 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2352 | { |
a455d0f6 MC |
2353 | /* |
2354 | * at this point we check that we have the required stuff from | |
2355 | * the server | |
2356 | */ | |
2357 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2358 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2359 | return 0; | |
a455d0f6 MC |
2360 | } |
2361 | ||
bb1aaab4 | 2362 | /* |
aff8c126 RS |
2363 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2364 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2365 | * message, or NULL and -1 otherwise |
2366 | */ | |
aff8c126 RS |
2367 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2368 | && s->ctx->ext.status_cb != NULL) { | |
2369 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2370 | ||
bb1aaab4 | 2371 | if (ret == 0) { |
7776a36c MC |
2372 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2373 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2374 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2375 | return 0; |
bb1aaab4 MC |
2376 | } |
2377 | if (ret < 0) { | |
7776a36c MC |
2378 | *al = SSL_AD_INTERNAL_ERROR; |
2379 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2380 | ERR_R_MALLOC_FAILURE); | |
2381 | return 0; | |
bb1aaab4 MC |
2382 | } |
2383 | } | |
ed29e82a RP |
2384 | #ifndef OPENSSL_NO_CT |
2385 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2386 | /* Note we validate the SCTs whether or not we abort on error */ |
2387 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2388 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2389 | return 0; | |
ed29e82a RP |
2390 | } |
2391 | } | |
2392 | #endif | |
2393 | ||
7776a36c MC |
2394 | return 1; |
2395 | } | |
2396 | ||
2397 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2398 | { | |
2399 | int al = SSL_AD_INTERNAL_ERROR; | |
2400 | ||
2401 | if (PACKET_remaining(pkt) > 0) { | |
2402 | /* should contain no data */ | |
2403 | al = SSL_AD_DECODE_ERROR; | |
2404 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2405 | goto err; | |
2406 | } | |
2407 | #ifndef OPENSSL_NO_SRP | |
2408 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2409 | if (SRP_Calc_A_param(s) <= 0) { | |
2410 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2411 | goto err; | |
2412 | } | |
2413 | } | |
2414 | #endif | |
2415 | ||
2416 | /* | |
2417 | * Error queue messages are generated directly by this function | |
2418 | */ | |
2419 | if (!tls_process_initial_server_flight(s, &al)) | |
2420 | goto err; | |
2421 | ||
473483d4 MC |
2422 | #ifndef OPENSSL_NO_SCTP |
2423 | /* Only applies to renegotiation */ | |
2424 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2425 | && s->renegotiate != 0) |
473483d4 MC |
2426 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2427 | else | |
2428 | #endif | |
2429 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2430 | |
2431 | err: | |
2432 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2433 | ossl_statem_set_error(s); | |
2434 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2435 | } |
176f31dd | 2436 | |
f1ec23c0 | 2437 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2438 | { |
7689082b | 2439 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2440 | int ret = 0; |
2441 | /* | |
2442 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2443 | * \0-terminated identity. The last byte is for us for simulating | |
2444 | * strnlen. | |
2445 | */ | |
2446 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2447 | size_t identitylen = 0; | |
2448 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2449 | unsigned char *tmppsk = NULL; | |
2450 | char *tmpidentity = NULL; | |
2451 | size_t psklen = 0; | |
2452 | ||
2453 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2454 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2455 | *al = SSL_AD_INTERNAL_ERROR; |
2456 | goto err; | |
2457 | } | |
d02b48c6 | 2458 | |
13c0ec4a | 2459 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2460 | |
13c0ec4a MC |
2461 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2462 | identity, sizeof(identity) - 1, | |
2463 | psk, sizeof(psk)); | |
7689082b | 2464 | |
13c0ec4a | 2465 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2466 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2467 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2468 | goto err; | |
2469 | } else if (psklen == 0) { | |
05ec6a25 | 2470 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2471 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2472 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2473 | goto err; | |
2474 | } | |
7689082b | 2475 | |
13c0ec4a MC |
2476 | identitylen = strlen(identity); |
2477 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2478 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2479 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2480 | goto err; | |
2481 | } | |
7689082b | 2482 | |
13c0ec4a MC |
2483 | tmppsk = OPENSSL_memdup(psk, psklen); |
2484 | tmpidentity = OPENSSL_strdup(identity); | |
2485 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2486 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2487 | *al = SSL_AD_INTERNAL_ERROR; |
2488 | goto err; | |
2489 | } | |
7689082b | 2490 | |
13c0ec4a MC |
2491 | OPENSSL_free(s->s3->tmp.psk); |
2492 | s->s3->tmp.psk = tmppsk; | |
2493 | s->s3->tmp.psklen = psklen; | |
2494 | tmppsk = NULL; | |
2495 | OPENSSL_free(s->session->psk_identity); | |
2496 | s->session->psk_identity = tmpidentity; | |
2497 | tmpidentity = NULL; | |
f1ec23c0 | 2498 | |
b2b3024e | 2499 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2500 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2501 | *al = SSL_AD_INTERNAL_ERROR; | |
2502 | goto err; | |
2503 | } | |
7689082b | 2504 | |
13c0ec4a | 2505 | ret = 1; |
0bce0b02 | 2506 | |
13c0ec4a MC |
2507 | err: |
2508 | OPENSSL_cleanse(psk, psklen); | |
2509 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2510 | OPENSSL_clear_free(tmppsk, psklen); | |
2511 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2512 | |
13c0ec4a MC |
2513 | return ret; |
2514 | #else | |
05ec6a25 | 2515 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2516 | *al = SSL_AD_INTERNAL_ERROR; |
2517 | return 0; | |
b9908bf9 | 2518 | #endif |
13c0ec4a | 2519 | } |
b9908bf9 | 2520 | |
f1ec23c0 | 2521 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2522 | { |
bc36ee62 | 2523 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2524 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2525 | EVP_PKEY *pkey = NULL; |
2526 | EVP_PKEY_CTX *pctx = NULL; | |
2527 | size_t enclen; | |
2528 | unsigned char *pms = NULL; | |
2529 | size_t pmslen = 0; | |
b9908bf9 | 2530 | |
13c0ec4a MC |
2531 | if (s->session->peer == NULL) { |
2532 | /* | |
2533 | * We should always have a server certificate with SSL_kRSA. | |
2534 | */ | |
05ec6a25 | 2535 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2536 | return 0; |
2537 | } | |
0f113f3e | 2538 | |
13c0ec4a MC |
2539 | pkey = X509_get0_pubkey(s->session->peer); |
2540 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2541 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2542 | return 0; |
2543 | } | |
0f113f3e | 2544 | |
13c0ec4a MC |
2545 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2546 | pms = OPENSSL_malloc(pmslen); | |
2547 | if (pms == NULL) { | |
05ec6a25 | 2548 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2549 | *al = SSL_AD_INTERNAL_ERROR; |
2550 | return 0; | |
2551 | } | |
0bce0b02 | 2552 | |
13c0ec4a MC |
2553 | pms[0] = s->client_version >> 8; |
2554 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2555 | /* TODO(size_t): Convert this function */ |
2556 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2557 | goto err; |
2558 | } | |
0f113f3e | 2559 | |
13c0ec4a | 2560 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2561 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2562 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2563 | goto err; | |
2564 | } | |
13c0ec4a MC |
2565 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2566 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2567 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2568 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2569 | goto err; |
2570 | } | |
f1ec23c0 MC |
2571 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2572 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2573 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2574 | goto err; |
2575 | } | |
13c0ec4a MC |
2576 | EVP_PKEY_CTX_free(pctx); |
2577 | pctx = NULL; | |
0f113f3e | 2578 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2579 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2580 | (*p)[1]++; | |
2581 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2582 | tmp_buf[0] = 0x70; | |
0f113f3e | 2583 | # endif |
0f113f3e | 2584 | |
13c0ec4a | 2585 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2586 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2587 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2588 | goto err; | |
b9908bf9 | 2589 | } |
13c0ec4a MC |
2590 | |
2591 | s->s3->tmp.pms = pms; | |
2592 | s->s3->tmp.pmslen = pmslen; | |
2593 | ||
2faa1b48 CB |
2594 | /* Log the premaster secret, if logging is enabled. */ |
2595 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2596 | goto err; | |
2597 | ||
13c0ec4a MC |
2598 | return 1; |
2599 | err: | |
2600 | OPENSSL_clear_free(pms, pmslen); | |
2601 | EVP_PKEY_CTX_free(pctx); | |
2602 | ||
2603 | return 0; | |
2604 | #else | |
05ec6a25 | 2605 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2606 | *al = SSL_AD_INTERNAL_ERROR; |
2607 | return 0; | |
f9b3bff6 | 2608 | #endif |
13c0ec4a MC |
2609 | } |
2610 | ||
f1ec23c0 | 2611 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2612 | { |
2613 | #ifndef OPENSSL_NO_DH | |
2614 | DH *dh_clnt = NULL; | |
2615 | const BIGNUM *pub_key; | |
2616 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2617 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2618 | |
2619 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2620 | if (skey == NULL) |
2621 | goto err; | |
2622 | ||
0a699a07 | 2623 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2624 | if (ckey == NULL) |
2625 | goto err; | |
2626 | ||
a8c1c704 MC |
2627 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2628 | ||
0f1e51ea | 2629 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2630 | goto err; |
a8c1c704 MC |
2631 | |
2632 | /* send off the data */ | |
2633 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2634 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2635 | goto err; |
2636 | ||
2637 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2638 | EVP_PKEY_free(ckey); |
2639 | ||
2640 | return 1; | |
f1ec23c0 MC |
2641 | err: |
2642 | EVP_PKEY_free(ckey); | |
2643 | #endif | |
05ec6a25 | 2644 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2645 | *al = SSL_AD_INTERNAL_ERROR; |
2646 | return 0; | |
a8c1c704 MC |
2647 | } |
2648 | ||
f1ec23c0 | 2649 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2650 | { |
2651 | #ifndef OPENSSL_NO_EC | |
2652 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2653 | size_t encoded_pt_len = 0; |
67ad5aab | 2654 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2655 | int ret = 0; |
67ad5aab MC |
2656 | |
2657 | skey = s->s3->peer_tmp; | |
ec24630a | 2658 | if (skey == NULL) { |
05ec6a25 | 2659 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2660 | return 0; |
2661 | } | |
2662 | ||
0a699a07 | 2663 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2664 | if (ckey == NULL) { |
2665 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2666 | goto err; | |
2667 | } | |
67ad5aab | 2668 | |
0f1e51ea | 2669 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2670 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2671 | goto err; |
2672 | } | |
2673 | ||
2674 | /* Generate encoding of client key */ | |
ec24630a | 2675 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2676 | |
2677 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2678 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2679 | goto err; |
2680 | } | |
2681 | ||
b2b3024e | 2682 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2683 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2684 | goto err; | |
2685 | } | |
67ad5aab | 2686 | |
f1ec23c0 | 2687 | ret = 1; |
67ad5aab | 2688 | err: |
f1ec23c0 | 2689 | OPENSSL_free(encodedPoint); |
67ad5aab | 2690 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2691 | return ret; |
67ad5aab | 2692 | #else |
05ec6a25 | 2693 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2694 | *al = SSL_AD_INTERNAL_ERROR; |
2695 | return 0; | |
2696 | #endif | |
2697 | } | |
2698 | ||
f1ec23c0 | 2699 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2700 | { |
2701 | #ifndef OPENSSL_NO_GOST | |
2702 | /* GOST key exchange message creation */ | |
2703 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2704 | X509 *peer_cert; | |
2705 | size_t msglen; | |
2706 | unsigned int md_len; | |
2707 | unsigned char shared_ukm[32], tmp[256]; | |
2708 | EVP_MD_CTX *ukm_hash = NULL; | |
2709 | int dgst_nid = NID_id_GostR3411_94; | |
2710 | unsigned char *pms = NULL; | |
2711 | size_t pmslen = 0; | |
2712 | ||
2713 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2714 | dgst_nid = NID_id_GostR3411_2012_256; | |
2715 | ||
2716 | /* | |
2717 | * Get server sertificate PKEY and create ctx from it | |
2718 | */ | |
2719 | peer_cert = s->session->peer; | |
2720 | if (!peer_cert) { | |
2721 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2722 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2723 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2724 | return 0; | |
2725 | } | |
2726 | ||
2727 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2728 | if (pkey_ctx == NULL) { | |
2729 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2730 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2731 | return 0; |
2732 | } | |
2733 | /* | |
2734 | * If we have send a certificate, and certificate key | |
2735 | * parameters match those of server certificate, use | |
2736 | * certificate key for key exchange | |
2737 | */ | |
2738 | ||
2739 | /* Otherwise, generate ephemeral key pair */ | |
2740 | pmslen = 32; | |
2741 | pms = OPENSSL_malloc(pmslen); | |
2742 | if (pms == NULL) { | |
2743 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2744 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2745 | goto err; |
e00e0b3d MC |
2746 | } |
2747 | ||
2748 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2749 | /* Generate session key |
2750 | * TODO(size_t): Convert this function | |
2751 | */ | |
2752 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2753 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2754 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2755 | goto err; |
2756 | }; | |
e00e0b3d MC |
2757 | /* |
2758 | * Compute shared IV and store it in algorithm-specific context | |
2759 | * data | |
2760 | */ | |
2761 | ukm_hash = EVP_MD_CTX_new(); | |
2762 | if (ukm_hash == NULL | |
a230b26e EK |
2763 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2764 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2765 | SSL3_RANDOM_SIZE) <= 0 | |
2766 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2767 | SSL3_RANDOM_SIZE) <= 0 | |
2768 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2769 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2770 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2771 | goto err; |
2772 | } | |
2773 | EVP_MD_CTX_free(ukm_hash); | |
2774 | ukm_hash = NULL; | |
2775 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2776 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2777 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2778 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2779 | goto err; |
2780 | } | |
2781 | /* Make GOST keytransport blob message */ | |
2782 | /* | |
2783 | * Encapsulate it into sequence | |
2784 | */ | |
e00e0b3d MC |
2785 | msglen = 255; |
2786 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2787 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2788 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2789 | goto err; |
2790 | } | |
f1ec23c0 | 2791 | |
08029dfa MC |
2792 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2793 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2794 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2795 | *al = SSL_AD_INTERNAL_ERROR; |
2796 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2797 | goto err; | |
e00e0b3d | 2798 | } |
f1ec23c0 | 2799 | |
e00e0b3d MC |
2800 | EVP_PKEY_CTX_free(pkey_ctx); |
2801 | s->s3->tmp.pms = pms; | |
2802 | s->s3->tmp.pmslen = pmslen; | |
2803 | ||
2804 | return 1; | |
2805 | err: | |
2806 | EVP_PKEY_CTX_free(pkey_ctx); | |
2807 | OPENSSL_clear_free(pms, pmslen); | |
2808 | EVP_MD_CTX_free(ukm_hash); | |
2809 | return 0; | |
2810 | #else | |
05ec6a25 | 2811 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2812 | *al = SSL_AD_INTERNAL_ERROR; |
2813 | return 0; | |
2814 | #endif | |
2815 | } | |
2816 | ||
f1ec23c0 | 2817 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2818 | { |
8b9546c7 | 2819 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2820 | unsigned char *abytes = NULL; |
2821 | ||
2822 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2823 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2824 | &abytes)) { | |
05ec6a25 | 2825 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2826 | return 0; |
2827 | } | |
f1ec23c0 MC |
2828 | BN_bn2bin(s->srp_ctx.A, abytes); |
2829 | ||
840a2bf8 MC |
2830 | OPENSSL_free(s->session->srp_username); |
2831 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2832 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2833 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2834 | return 0; |
2835 | } | |
2836 | ||
2837 | return 1; | |
2838 | #else | |
05ec6a25 | 2839 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2840 | *al = SSL_AD_INTERNAL_ERROR; |
2841 | return 0; | |
2842 | #endif | |
2843 | } | |
2844 | ||
7cea05dc | 2845 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2846 | { |
13c0ec4a MC |
2847 | unsigned long alg_k; |
2848 | int al = -1; | |
2849 | ||
f1ec23c0 | 2850 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2851 | |
13c0ec4a | 2852 | if ((alg_k & SSL_PSK) |
7cea05dc | 2853 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2854 | goto err; |
2855 | ||
f1ec23c0 | 2856 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2857 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 2858 | goto err; |
a8c1c704 | 2859 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 2860 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 2861 | goto err; |
67ad5aab | 2862 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 2863 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 2864 | goto err; |
e00e0b3d | 2865 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 2866 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 2867 | goto err; |
840a2bf8 | 2868 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 2869 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 2870 | goto err; |
4a424545 | 2871 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
2872 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2873 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2874 | goto err; | |
2875 | } | |
2876 | ||
b9908bf9 | 2877 | return 1; |
0f113f3e | 2878 | err: |
13c0ec4a MC |
2879 | if (al != -1) |
2880 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 2881 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 2882 | s->s3->tmp.pms = NULL; |
7689082b DSH |
2883 | #ifndef OPENSSL_NO_PSK |
2884 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2885 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2886 | #endif |
b9908bf9 MC |
2887 | return 0; |
2888 | } | |
2889 | ||
2890 | int tls_client_key_exchange_post_work(SSL *s) | |
2891 | { | |
2892 | unsigned char *pms = NULL; | |
2893 | size_t pmslen = 0; | |
2894 | ||
6f137370 MC |
2895 | pms = s->s3->tmp.pms; |
2896 | pmslen = s->s3->tmp.pmslen; | |
2897 | ||
b9908bf9 MC |
2898 | #ifndef OPENSSL_NO_SRP |
2899 | /* Check for SRP */ | |
2900 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2901 | if (!srp_generate_client_master_secret(s)) { | |
2902 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2903 | ERR_R_INTERNAL_ERROR); | |
2904 | goto err; | |
2905 | } | |
2906 | return 1; | |
2907 | } | |
2908 | #endif | |
b9908bf9 MC |
2909 | |
2910 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2911 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2912 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2913 | goto err; | |
2914 | } | |
2915 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2916 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2917 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
2918 | /* ssl_generate_master_secret frees the pms even on error */ |
2919 | pms = NULL; | |
2920 | pmslen = 0; | |
b9908bf9 MC |
2921 | goto err; |
2922 | } | |
6f137370 MC |
2923 | pms = NULL; |
2924 | pmslen = 0; | |
473483d4 MC |
2925 | |
2926 | #ifndef OPENSSL_NO_SCTP | |
2927 | if (SSL_IS_DTLS(s)) { | |
2928 | unsigned char sctpauthkey[64]; | |
2929 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2930 | ||
2931 | /* | |
2932 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2933 | * used. | |
2934 | */ | |
141eb8c6 MC |
2935 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2936 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2937 | |
2938 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
2939 | sizeof(sctpauthkey), labelbuffer, |
2940 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
2941 | goto err; |
2942 | ||
2943 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2944 | sizeof(sctpauthkey), sctpauthkey); | |
2945 | } | |
2946 | #endif | |
2947 | ||
b9908bf9 MC |
2948 | return 1; |
2949 | err: | |
2950 | OPENSSL_clear_free(pms, pmslen); | |
2951 | s->s3->tmp.pms = NULL; | |
2952 | return 0; | |
0f113f3e | 2953 | } |
d02b48c6 | 2954 | |
0f113f3e MC |
2955 | /* |
2956 | * Check a certificate can be used for client authentication. Currently check | |
2957 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2958 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2959 | */ |
2960 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2961 | { |
0f113f3e MC |
2962 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2963 | return 0; | |
2964 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2965 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2966 | return 0; |
2967 | /* | |
2968 | * If strict mode check suitability of chain before using it. This also | |
2969 | * adjusts suite B digest if necessary. | |
2970 | */ | |
2971 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2972 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2973 | return 0; | |
0f113f3e MC |
2974 | return 1; |
2975 | } | |
0d609395 | 2976 | |
be3583fa | 2977 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2978 | { |
2979 | X509 *x509 = NULL; | |
2980 | EVP_PKEY *pkey = NULL; | |
2981 | int i; | |
2982 | ||
b9908bf9 | 2983 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2984 | /* Let cert callback update client certificates if required */ |
2985 | if (s->cert->cert_cb) { | |
2986 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2987 | if (i < 0) { | |
2988 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2989 | return WORK_MORE_A; |
0f113f3e MC |
2990 | } |
2991 | if (i == 0) { | |
2992 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2993 | ossl_statem_set_error(s); |
0f113f3e MC |
2994 | return 0; |
2995 | } | |
2996 | s->rwstate = SSL_NOTHING; | |
2997 | } | |
2998 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2999 | return WORK_FINISHED_CONTINUE; |
3000 | ||
3001 | /* Fall through to WORK_MORE_B */ | |
3002 | wst = WORK_MORE_B; | |
0f113f3e MC |
3003 | } |
3004 | ||
3005 | /* We need to get a client cert */ | |
b9908bf9 | 3006 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3007 | /* |
3008 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3009 | * return(-1); We then get retied later | |
3010 | */ | |
0f113f3e MC |
3011 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3012 | if (i < 0) { | |
3013 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3014 | return WORK_MORE_B; |
0f113f3e MC |
3015 | } |
3016 | s->rwstate = SSL_NOTHING; | |
3017 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3018 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3019 | i = 0; | |
3020 | } else if (i == 1) { | |
3021 | i = 0; | |
b9908bf9 | 3022 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3023 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3024 | } | |
3025 | ||
222561fe | 3026 | X509_free(x509); |
25aaa98a | 3027 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3028 | if (i && !ssl3_check_client_certificate(s)) |
3029 | i = 0; | |
3030 | if (i == 0) { | |
3031 | if (s->version == SSL3_VERSION) { | |
3032 | s->s3->tmp.cert_req = 0; | |
3033 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3034 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3035 | } else { |
3036 | s->s3->tmp.cert_req = 2; | |
124037fd | 3037 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3038 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3039 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3040 | return 0; |
3041 | } | |
0f113f3e MC |
3042 | } |
3043 | } | |
3044 | ||
b9908bf9 | 3045 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3046 | } |
3047 | ||
b9908bf9 MC |
3048 | /* Shouldn't ever get here */ |
3049 | return WORK_ERROR; | |
3050 | } | |
3051 | ||
7cea05dc | 3052 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3053 | { |
0baed5e9 | 3054 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3055 | |
3056 | /* | |
3057 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3058 | * later | |
3059 | */ | |
3060 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3061 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3062 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3063 | : s->cert->key, |
3064 | &al)) { | |
b9908bf9 | 3065 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
e96e0f8e | 3066 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
b9908bf9 | 3067 | return 0; |
0f113f3e | 3068 | } |
b9908bf9 MC |
3069 | |
3070 | return 1; | |
0f113f3e MC |
3071 | } |
3072 | ||
3073 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3074 | |
36d16f8e | 3075 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3076 | { |
60f43e9e RL |
3077 | int i; |
3078 | #ifndef OPENSSL_NO_EC | |
3079 | int idx; | |
3080 | #endif | |
0f113f3e MC |
3081 | long alg_k, alg_a; |
3082 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3083 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3084 | |
0f113f3e MC |
3085 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3086 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3087 | |
0f113f3e | 3088 | /* we don't have a certificate */ |
55a9a16f | 3089 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3090 | return (1); |
d02b48c6 | 3091 | |
0f113f3e | 3092 | /* This is the passed certificate */ |
d02b48c6 | 3093 | |
10bf4fc2 | 3094 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3095 | idx = s->session->peer_type; |
0f113f3e | 3096 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3097 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3098 | /* check failed */ |
3099 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3100 | goto f_err; | |
3101 | } else { | |
3102 | return 1; | |
3103 | } | |
3104 | } else if (alg_a & SSL_aECDSA) { | |
3105 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3106 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3107 | goto f_err; | |
0f113f3e MC |
3108 | } |
3109 | #endif | |
8382fd3a | 3110 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3111 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3112 | |
3113 | /* Check that we have a certificate if we require one */ | |
3114 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3115 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3116 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3117 | goto f_err; | |
3118 | } | |
bc36ee62 | 3119 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3120 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3121 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3122 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3123 | goto f_err; | |
3124 | } | |
d02b48c6 | 3125 | #endif |
bc36ee62 | 3126 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3127 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3128 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3129 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3130 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3131 | goto f_err; | |
0f113f3e | 3132 | } |
79df9d62 | 3133 | #endif |
bc36ee62 | 3134 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3135 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3136 | al = SSL_AD_INTERNAL_ERROR; |
3137 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3138 | goto f_err; |
0f113f3e | 3139 | } |
d02b48c6 RE |
3140 | #endif |
3141 | ||
0f113f3e MC |
3142 | return (1); |
3143 | f_err: | |
26c79d56 | 3144 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3145 | return (0); |
3146 | } | |
3147 | ||
e481f9b9 | 3148 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3149 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3150 | { |
15e6be6c MC |
3151 | size_t len, padding_len; |
3152 | unsigned char *padding = NULL; | |
15e6be6c | 3153 | |
aff8c126 | 3154 | len = s->ext.npn_len; |
b9908bf9 | 3155 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3156 | |
aff8c126 | 3157 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3158 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3159 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3160 | goto err; | |
3161 | } | |
3162 | ||
3163 | memset(padding, 0, padding_len); | |
3164 | ||
b9908bf9 | 3165 | return 1; |
15e6be6c | 3166 | err: |
15e6be6c MC |
3167 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3168 | return 0; | |
b9908bf9 | 3169 | } |
6434abbf | 3170 | #endif |
368888bc | 3171 | |
c7f47786 MC |
3172 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3173 | { | |
3174 | if (PACKET_remaining(pkt) > 0) { | |
3175 | /* should contain no data */ | |
3176 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3177 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3178 | ossl_statem_set_error(s); | |
3179 | return MSG_PROCESS_ERROR; | |
3180 | } | |
3181 | ||
3182 | /* | |
3183 | * This is a historical discrepancy maintained for compatibility | |
3184 | * reasons. If a TLS client receives a HelloRequest it will attempt | |
3185 | * an abbreviated handshake. However if a DTLS client receives a | |
3186 | * HelloRequest it will do a full handshake. | |
3187 | */ | |
3188 | if (SSL_IS_DTLS(s)) | |
3189 | SSL_renegotiate(s); | |
3190 | else | |
3191 | SSL_renegotiate_abbreviated(s); | |
3192 | ||
3193 | return MSG_PROCESS_FINISHED_READING; | |
3194 | } | |
3195 | ||
e46f2334 MC |
3196 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3197 | { | |
3198 | int al = SSL_AD_INTERNAL_ERROR; | |
3199 | PACKET extensions; | |
3434f40b | 3200 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3201 | |
e46f2334 MC |
3202 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { |
3203 | al = SSL_AD_DECODE_ERROR; | |
3204 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3205 | goto err; | |
3206 | } | |
3207 | ||
e96e0f8e | 3208 | if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
1266eefd | 3209 | &rawexts, &al) |
e96e0f8e | 3210 | || !tls_parse_all_extensions(s, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f97d4c37 | 3211 | rawexts, NULL, 0, &al)) |
3434f40b MC |
3212 | goto err; |
3213 | ||
1b0286a3 | 3214 | OPENSSL_free(rawexts); |
e46f2334 MC |
3215 | return MSG_PROCESS_CONTINUE_READING; |
3216 | ||
3217 | err: | |
3218 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3219 | ossl_statem_set_error(s); | |
1b0286a3 | 3220 | OPENSSL_free(rawexts); |
e46f2334 MC |
3221 | return MSG_PROCESS_ERROR; |
3222 | } | |
3223 | ||
368888bc | 3224 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3225 | { |
3226 | int i = 0; | |
368888bc | 3227 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3228 | if (s->ctx->client_cert_engine) { |
3229 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3230 | SSL_get_client_CA_list(s), | |
3231 | px509, ppkey, NULL, NULL, NULL); | |
3232 | if (i != 0) | |
3233 | return i; | |
3234 | } | |
3235 | #endif | |
3236 | if (s->ctx->client_cert_cb) | |
3237 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3238 | return i; | |
3239 | } | |
d45ba43d | 3240 | |
ae2f7b37 | 3241 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3242 | { |
2c7b4dbc MC |
3243 | int i; |
3244 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3245 | int empty_reneg_info_scsv = !s->renegotiate; |
3246 | /* Set disabled masks for this session */ | |
3247 | ssl_set_client_disabled(s); | |
3248 | ||
3249 | if (sk == NULL) | |
3250 | return (0); | |
d45ba43d | 3251 | |
2c7b4dbc MC |
3252 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3253 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3254 | # error Max cipher length too short | |
3255 | # endif | |
3256 | /* | |
3257 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3258 | * chop number of supported ciphers to keep it well below this if we | |
3259 | * use TLS v1.2 | |
3260 | */ | |
3261 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3262 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3263 | else | |
3264 | #endif | |
3265 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3266 | maxlen = 0xfffe; | |
3267 | ||
3268 | if (empty_reneg_info_scsv) | |
3269 | maxlen -= 2; | |
3270 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3271 | maxlen -= 2; | |
3272 | ||
3273 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3274 | const SSL_CIPHER *c; | |
3275 | ||
d45ba43d MC |
3276 | c = sk_SSL_CIPHER_value(sk, i); |
3277 | /* Skip disabled ciphers */ | |
3278 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3279 | continue; | |
2c7b4dbc MC |
3280 | |
3281 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3282 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3283 | return 0; | |
3284 | } | |
3285 | ||
3286 | totlen += len; | |
d45ba43d | 3287 | } |
2c7b4dbc MC |
3288 | |
3289 | if (totlen == 0) { | |
3290 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3291 | return 0; | |
3292 | } | |
3293 | ||
3294 | if (totlen != 0) { | |
d45ba43d MC |
3295 | if (empty_reneg_info_scsv) { |
3296 | static SSL_CIPHER scsv = { | |
3297 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3298 | }; | |
2c7b4dbc MC |
3299 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3300 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3301 | return 0; | |
3302 | } | |
d45ba43d MC |
3303 | } |
3304 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3305 | static SSL_CIPHER scsv = { | |
3306 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3307 | }; | |
2c7b4dbc MC |
3308 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3309 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3310 | return 0; | |
3311 | } | |
d45ba43d MC |
3312 | } |
3313 | } | |
3314 | ||
2c7b4dbc | 3315 | return 1; |
d45ba43d | 3316 | } |