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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 | |
7ab09630 | 62 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 63 | static int key_exchange_expected(SSL *s); |
0f113f3e | 64 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 65 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 66 | WPACKET *pkt); |
ea262260 | 67 | |
61ae935a MC |
68 | /* |
69 | * Is a CertificateRequest message allowed at the moment or not? | |
70 | * | |
71 | * Return values are: | |
72 | * 1: Yes | |
73 | * 0: No | |
74 | */ | |
7ab09630 | 75 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
76 | { |
77 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 78 | if ((s->version > SSL3_VERSION |
a230b26e EK |
79 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
80 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
81 | return 0; |
82 | ||
83 | return 1; | |
84 | } | |
85 | ||
86 | /* | |
a455d0f6 | 87 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
88 | * |
89 | * Return values are: | |
90 | * 1: Yes | |
91 | * 0: No | |
92 | */ | |
a455d0f6 | 93 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
94 | { |
95 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
96 | ||
97 | /* | |
98 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 99 | * ciphersuite or for SRP |
61ae935a | 100 | */ |
a455d0f6 MC |
101 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
102 | | SSL_kSRP)) { | |
103 | return 1; | |
61ae935a MC |
104 | } |
105 | ||
a455d0f6 | 106 | return 0; |
61ae935a MC |
107 | } |
108 | ||
0f1e51ea MC |
109 | /* |
110 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
111 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
112 | * server. The message type that the server has sent is provided in |mt|. The | |
113 | * current state is in |s->statem.hand_state|. | |
114 | * | |
94ed2c67 MC |
115 | * Return values are 1 for success (transition allowed) and 0 on error |
116 | * (transition not allowed) | |
0f1e51ea MC |
117 | */ |
118 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
119 | { | |
120 | OSSL_STATEM *st = &s->statem; | |
121 | ||
94ed2c67 MC |
122 | /* |
123 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
124 | * we will update this to look more like real TLSv1.3 | |
125 | */ | |
126 | ||
0f1e51ea MC |
127 | /* |
128 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
129 | * yet negotiated TLSv1.3 at that point so that is handled by | |
130 | * ossl_statem_client_read_transition() | |
131 | */ | |
132 | ||
133 | switch (st->hand_state) { | |
134 | default: | |
135 | break; | |
136 | ||
137 | case TLS_ST_CR_SRVR_HELLO: | |
138 | if (s->hit) { | |
92760c21 MC |
139 | if (mt == SSL3_MT_FINISHED) { |
140 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
141 | return 1; |
142 | } | |
143 | } else { | |
92760c21 MC |
144 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
145 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
146 | return 1; | |
f5ca0b04 MC |
147 | } |
148 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
149 | st->hand_state = TLS_ST_CR_CERT; |
150 | return 1; | |
151 | } | |
152 | } | |
153 | break; | |
154 | ||
92760c21 MC |
155 | case TLS_ST_CR_CERT_REQ: |
156 | if (mt == SSL3_MT_CERTIFICATE) { | |
157 | st->hand_state = TLS_ST_CR_CERT; | |
158 | return 1; | |
159 | } | |
160 | break; | |
161 | ||
0f1e51ea MC |
162 | case TLS_ST_CR_CERT: |
163 | /* | |
164 | * The CertificateStatus message is optional even if | |
165 | * |tlsext_status_expected| is set | |
166 | */ | |
167 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
168 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
169 | return 1; | |
170 | } | |
171 | /* Fall through */ | |
172 | ||
173 | case TLS_ST_CR_CERT_STATUS: | |
0f1e51ea MC |
174 | if (mt == SSL3_MT_FINISHED) { |
175 | st->hand_state = TLS_ST_CR_FINISHED; | |
176 | return 1; | |
177 | } | |
178 | break; | |
92760c21 | 179 | |
0f1e51ea MC |
180 | } |
181 | ||
0f1e51ea | 182 | /* No valid transition found */ |
0f1e51ea MC |
183 | return 0; |
184 | } | |
185 | ||
61ae935a | 186 | /* |
8481f583 MC |
187 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
188 | * handshake state transitions when the client is reading messages from the | |
189 | * server. The message type that the server has sent is provided in |mt|. The | |
190 | * current state is in |s->statem.hand_state|. | |
61ae935a | 191 | * |
94ed2c67 MC |
192 | * Return values are 1 for success (transition allowed) and 0 on error |
193 | * (transition not allowed) | |
61ae935a | 194 | */ |
8481f583 | 195 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 196 | { |
d6f1a6e9 | 197 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 198 | int ske_expected; |
61ae935a | 199 | |
0f1e51ea MC |
200 | /* |
201 | * Note that after a ClientHello we don't know what version we are going | |
202 | * to negotiate yet, so we don't take this branch until later | |
203 | */ | |
f5ca0b04 | 204 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
205 | if (!ossl_statem_client13_read_transition(s, mt)) |
206 | goto err; | |
207 | return 1; | |
208 | } | |
0f1e51ea | 209 | |
a230b26e | 210 | switch (st->hand_state) { |
f3b3d7f0 RS |
211 | default: |
212 | break; | |
213 | ||
61ae935a MC |
214 | case TLS_ST_CW_CLNT_HELLO: |
215 | if (mt == SSL3_MT_SERVER_HELLO) { | |
216 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
217 | return 1; | |
218 | } | |
219 | ||
220 | if (SSL_IS_DTLS(s)) { | |
221 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
222 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
223 | return 1; | |
224 | } | |
225 | } | |
226 | break; | |
227 | ||
228 | case TLS_ST_CR_SRVR_HELLO: | |
229 | if (s->hit) { | |
230 | if (s->tlsext_ticket_expected) { | |
231 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
232 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
233 | return 1; | |
234 | } | |
235 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
236 | st->hand_state = TLS_ST_CR_CHANGE; | |
237 | return 1; | |
238 | } | |
239 | } else { | |
240 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
241 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
242 | return 1; | |
ad3819c2 | 243 | } else if (s->version >= TLS1_VERSION |
a230b26e EK |
244 | && s->tls_session_secret_cb != NULL |
245 | && s->session->tlsext_tick != NULL | |
246 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
ad3819c2 MC |
247 | /* |
248 | * Normally, we can tell if the server is resuming the session | |
249 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
250 | * the next server message after the ServerHello to determine if | |
251 | * the server is resuming. | |
252 | */ | |
253 | s->hit = 1; | |
254 | st->hand_state = TLS_ST_CR_CHANGE; | |
255 | return 1; | |
61ae935a | 256 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 257 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
258 | if (mt == SSL3_MT_CERTIFICATE) { |
259 | st->hand_state = TLS_ST_CR_CERT; | |
260 | return 1; | |
261 | } | |
262 | } else { | |
a455d0f6 | 263 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
264 | /* SKE is optional for some PSK ciphersuites */ |
265 | if (ske_expected | |
a230b26e EK |
266 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
267 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
268 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
269 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
270 | return 1; | |
271 | } | |
272 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
273 | && cert_req_allowed(s)) { |
274 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
275 | return 1; | |
a455d0f6 | 276 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
277 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
278 | return 1; | |
61ae935a MC |
279 | } |
280 | } | |
281 | } | |
282 | break; | |
283 | ||
284 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
285 | /* |
286 | * The CertificateStatus message is optional even if | |
287 | * |tlsext_status_expected| is set | |
288 | */ | |
289 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
290 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
291 | return 1; | |
a455d0f6 MC |
292 | } |
293 | /* Fall through */ | |
294 | ||
295 | case TLS_ST_CR_CERT_STATUS: | |
296 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 297 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
298 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
299 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
300 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
301 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
302 | return 1; | |
61ae935a | 303 | } |
672f3337 | 304 | goto err; |
61ae935a | 305 | } |
a455d0f6 | 306 | /* Fall through */ |
61ae935a | 307 | |
a455d0f6 MC |
308 | case TLS_ST_CR_KEY_EXCH: |
309 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
310 | if (cert_req_allowed(s)) { | |
61ae935a MC |
311 | st->hand_state = TLS_ST_CR_CERT_REQ; |
312 | return 1; | |
61ae935a | 313 | } |
672f3337 | 314 | goto err; |
61ae935a | 315 | } |
a455d0f6 | 316 | /* Fall through */ |
61ae935a MC |
317 | |
318 | case TLS_ST_CR_CERT_REQ: | |
319 | if (mt == SSL3_MT_SERVER_DONE) { | |
320 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
321 | return 1; | |
322 | } | |
323 | break; | |
324 | ||
325 | case TLS_ST_CW_FINISHED: | |
c45d6b2b DB |
326 | if (s->tlsext_ticket_expected) { |
327 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
328 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
329 | return 1; | |
330 | } | |
61ae935a MC |
331 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
332 | st->hand_state = TLS_ST_CR_CHANGE; | |
333 | return 1; | |
334 | } | |
335 | break; | |
336 | ||
337 | case TLS_ST_CR_SESSION_TICKET: | |
338 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
339 | st->hand_state = TLS_ST_CR_CHANGE; | |
340 | return 1; | |
341 | } | |
342 | break; | |
343 | ||
344 | case TLS_ST_CR_CHANGE: | |
345 | if (mt == SSL3_MT_FINISHED) { | |
346 | st->hand_state = TLS_ST_CR_FINISHED; | |
347 | return 1; | |
348 | } | |
349 | break; | |
61ae935a MC |
350 | } |
351 | ||
672f3337 | 352 | err: |
61ae935a | 353 | /* No valid transition found */ |
672f3337 | 354 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 355 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
356 | return 0; |
357 | } | |
358 | ||
359 | /* | |
0f1e51ea MC |
360 | * ossl_statem_client13_write_transition() works out what handshake state to |
361 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
362 | * server. | |
0f1e51ea MC |
363 | */ |
364 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
365 | { | |
366 | OSSL_STATEM *st = &s->statem; | |
367 | ||
94ed2c67 MC |
368 | /* |
369 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
370 | * we will update this to look more like real TLSv1.3 | |
371 | */ | |
372 | ||
0f1e51ea MC |
373 | /* |
374 | * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO, | |
375 | * because we haven't negotiated TLSv1.3 yet at that point. They are | |
376 | * handled by ossl_statem_client_write_transition(). | |
377 | */ | |
378 | switch (st->hand_state) { | |
379 | default: | |
380 | /* Shouldn't happen */ | |
381 | return WRITE_TRAN_ERROR; | |
382 | ||
92760c21 | 383 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 384 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 385 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
386 | return WRITE_TRAN_CONTINUE; |
387 | ||
388 | case TLS_ST_CW_CERT: | |
389 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 390 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 391 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
392 | return WRITE_TRAN_CONTINUE; |
393 | ||
394 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
395 | st->hand_state = TLS_ST_CW_FINISHED; |
396 | return WRITE_TRAN_CONTINUE; | |
397 | ||
398 | case TLS_ST_CW_FINISHED: | |
94ed2c67 MC |
399 | st->hand_state = TLS_ST_OK; |
400 | ossl_statem_set_in_init(s, 0); | |
401 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea MC |
402 | } |
403 | } | |
404 | ||
405 | /* | |
406 | * ossl_statem_client_write_transition() works out what handshake state to | |
407 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 408 | */ |
8481f583 | 409 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 410 | { |
d6f1a6e9 | 411 | OSSL_STATEM *st = &s->statem; |
61ae935a | 412 | |
0f1e51ea MC |
413 | /* |
414 | * Note that immediately before/after a ClientHello we don't know what | |
415 | * version we are going to negotiate yet, so we don't take this branch until | |
416 | * later | |
417 | */ | |
f5ca0b04 | 418 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
419 | return ossl_statem_client13_write_transition(s); |
420 | ||
a230b26e | 421 | switch (st->hand_state) { |
f3b3d7f0 RS |
422 | default: |
423 | /* Shouldn't happen */ | |
424 | return WRITE_TRAN_ERROR; | |
425 | ||
a230b26e EK |
426 | case TLS_ST_OK: |
427 | /* Renegotiation - fall through */ | |
428 | case TLS_ST_BEFORE: | |
429 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
430 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 431 | |
a230b26e EK |
432 | case TLS_ST_CW_CLNT_HELLO: |
433 | /* | |
434 | * No transition at the end of writing because we don't know what | |
435 | * we will be sent | |
436 | */ | |
437 | return WRITE_TRAN_FINISHED; | |
61ae935a | 438 | |
a230b26e EK |
439 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
440 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
441 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 442 | |
a230b26e EK |
443 | case TLS_ST_CR_SRVR_DONE: |
444 | if (s->s3->tmp.cert_req) | |
445 | st->hand_state = TLS_ST_CW_CERT; | |
446 | else | |
61ae935a | 447 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 448 | return WRITE_TRAN_CONTINUE; |
61ae935a | 449 | |
a230b26e EK |
450 | case TLS_ST_CW_CERT: |
451 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
452 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 453 | |
a230b26e EK |
454 | case TLS_ST_CW_KEY_EXCH: |
455 | /* | |
456 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
457 | * sent, but no verify packet is sent | |
458 | */ | |
459 | /* | |
460 | * XXX: For now, we do not support client authentication in ECDH | |
461 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
462 | * need to skip the certificate verify message when client's | |
463 | * ECDH public key is sent inside the client certificate. | |
464 | */ | |
465 | if (s->s3->tmp.cert_req == 1) { | |
466 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
467 | } else { | |
61ae935a | 468 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
469 | } |
470 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
471 | st->hand_state = TLS_ST_CW_CHANGE; | |
472 | } | |
473 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 474 | |
a230b26e EK |
475 | case TLS_ST_CW_CERT_VRFY: |
476 | st->hand_state = TLS_ST_CW_CHANGE; | |
477 | return WRITE_TRAN_CONTINUE; | |
478 | ||
479 | case TLS_ST_CW_CHANGE: | |
61ae935a | 480 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 481 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 482 | #else |
a230b26e EK |
483 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) |
484 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
485 | else | |
486 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 487 | #endif |
a230b26e | 488 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
489 | |
490 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
491 | case TLS_ST_CW_NEXT_PROTO: |
492 | st->hand_state = TLS_ST_CW_FINISHED; | |
493 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
494 | #endif |
495 | ||
a230b26e EK |
496 | case TLS_ST_CW_FINISHED: |
497 | if (s->hit) { | |
498 | st->hand_state = TLS_ST_OK; | |
499 | ossl_statem_set_in_init(s, 0); | |
500 | return WRITE_TRAN_CONTINUE; | |
501 | } else { | |
502 | return WRITE_TRAN_FINISHED; | |
503 | } | |
61ae935a | 504 | |
a230b26e EK |
505 | case TLS_ST_CR_FINISHED: |
506 | if (s->hit) { | |
507 | st->hand_state = TLS_ST_CW_CHANGE; | |
508 | return WRITE_TRAN_CONTINUE; | |
509 | } else { | |
510 | st->hand_state = TLS_ST_OK; | |
511 | ossl_statem_set_in_init(s, 0); | |
512 | return WRITE_TRAN_CONTINUE; | |
513 | } | |
61ae935a MC |
514 | } |
515 | } | |
516 | ||
517 | /* | |
518 | * Perform any pre work that needs to be done prior to sending a message from | |
519 | * the client to the server. | |
520 | */ | |
8481f583 | 521 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 522 | { |
d6f1a6e9 | 523 | OSSL_STATEM *st = &s->statem; |
61ae935a | 524 | |
a230b26e | 525 | switch (st->hand_state) { |
f3b3d7f0 RS |
526 | default: |
527 | /* No pre work to be done */ | |
528 | break; | |
529 | ||
61ae935a MC |
530 | case TLS_ST_CW_CLNT_HELLO: |
531 | s->shutdown = 0; | |
532 | if (SSL_IS_DTLS(s)) { | |
533 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
534 | if (!ssl3_init_finished_mac(s)) { |
535 | ossl_statem_set_error(s); | |
536 | return WORK_ERROR; | |
537 | } | |
61ae935a MC |
538 | } |
539 | break; | |
540 | ||
61ae935a MC |
541 | case TLS_ST_CW_CHANGE: |
542 | if (SSL_IS_DTLS(s)) { | |
543 | if (s->hit) { | |
544 | /* | |
545 | * We're into the last flight so we don't retransmit these | |
546 | * messages unless we need to. | |
547 | */ | |
548 | st->use_timer = 0; | |
549 | } | |
550 | #ifndef OPENSSL_NO_SCTP | |
551 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
552 | return dtls_wait_for_dry(s); | |
553 | #endif | |
554 | } | |
f3b3d7f0 | 555 | break; |
61ae935a MC |
556 | |
557 | case TLS_ST_OK: | |
558 | return tls_finish_handshake(s, wst); | |
61ae935a MC |
559 | } |
560 | ||
561 | return WORK_FINISHED_CONTINUE; | |
562 | } | |
563 | ||
564 | /* | |
565 | * Perform any work that needs to be done after sending a message from the | |
566 | * client to the server. | |
567 | */ | |
8481f583 | 568 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 569 | { |
d6f1a6e9 | 570 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
571 | |
572 | s->init_num = 0; | |
573 | ||
a230b26e | 574 | switch (st->hand_state) { |
f3b3d7f0 RS |
575 | default: |
576 | /* No post work to be done */ | |
577 | break; | |
578 | ||
61ae935a | 579 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 580 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 581 | return WORK_MORE_A; |
46417569 | 582 | |
61ae935a MC |
583 | if (SSL_IS_DTLS(s)) { |
584 | /* Treat the next message as the first packet */ | |
585 | s->first_packet = 1; | |
586 | } | |
587 | break; | |
588 | ||
589 | case TLS_ST_CW_KEY_EXCH: | |
590 | if (tls_client_key_exchange_post_work(s) == 0) | |
591 | return WORK_ERROR; | |
592 | break; | |
593 | ||
594 | case TLS_ST_CW_CHANGE: | |
595 | s->session->cipher = s->s3->tmp.new_cipher; | |
596 | #ifdef OPENSSL_NO_COMP | |
597 | s->session->compress_meth = 0; | |
598 | #else | |
599 | if (s->s3->tmp.new_compression == NULL) | |
600 | s->session->compress_meth = 0; | |
601 | else | |
602 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
603 | #endif | |
604 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
605 | return WORK_ERROR; | |
606 | ||
607 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
608 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
609 | return WORK_ERROR; | |
610 | ||
611 | if (SSL_IS_DTLS(s)) { | |
612 | #ifndef OPENSSL_NO_SCTP | |
613 | if (s->hit) { | |
614 | /* | |
615 | * Change to new shared key of SCTP-Auth, will be ignored if | |
616 | * no SCTP used. | |
617 | */ | |
618 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
619 | 0, NULL); | |
620 | } | |
621 | #endif | |
622 | ||
623 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
624 | } | |
625 | break; | |
626 | ||
627 | case TLS_ST_CW_FINISHED: | |
628 | #ifndef OPENSSL_NO_SCTP | |
629 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
630 | /* | |
631 | * Change to new shared key of SCTP-Auth, will be ignored if | |
632 | * no SCTP used. | |
633 | */ | |
634 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
635 | 0, NULL); | |
636 | } | |
637 | #endif | |
638 | if (statem_flush(s) != 1) | |
639 | return WORK_MORE_B; | |
92760c21 MC |
640 | |
641 | if (SSL_IS_TLS13(s)) { | |
642 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
643 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
644 | return WORK_ERROR; | |
645 | } | |
61ae935a | 646 | break; |
61ae935a MC |
647 | } |
648 | ||
649 | return WORK_FINISHED_CONTINUE; | |
650 | } | |
651 | ||
652 | /* | |
6392fb8e MC |
653 | * Get the message construction function and message type for sending from the |
654 | * client | |
61ae935a MC |
655 | * |
656 | * Valid return values are: | |
657 | * 1: Success | |
658 | * 0: Error | |
659 | */ | |
6392fb8e | 660 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 661 | confunc_f *confunc, int *mt) |
61ae935a | 662 | { |
d6f1a6e9 | 663 | OSSL_STATEM *st = &s->statem; |
61ae935a | 664 | |
4a01c59f MC |
665 | switch (st->hand_state) { |
666 | default: | |
667 | /* Shouldn't happen */ | |
668 | return 0; | |
669 | ||
670 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 671 | if (SSL_IS_DTLS(s)) |
6392fb8e | 672 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 673 | else |
6392fb8e MC |
674 | *confunc = tls_construct_change_cipher_spec; |
675 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
676 | break; |
677 | ||
678 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
679 | *confunc = tls_construct_client_hello; |
680 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
681 | break; |
682 | ||
683 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
684 | *confunc = tls_construct_client_certificate; |
685 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
686 | break; |
687 | ||
688 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
689 | *confunc = tls_construct_client_key_exchange; |
690 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
691 | break; |
692 | ||
693 | case TLS_ST_CW_CERT_VRFY: | |
6392fb8e MC |
694 | *confunc = tls_construct_client_verify; |
695 | *mt = SSL3_MT_CERTIFICATE_VERIFY; | |
4a01c59f | 696 | break; |
61ae935a MC |
697 | |
698 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 699 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
700 | *confunc = tls_construct_next_proto; |
701 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 702 | break; |
61ae935a | 703 | #endif |
4a01c59f | 704 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
705 | *confunc = tls_construct_finished; |
706 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
707 | break; |
708 | } | |
5923ad4b | 709 | |
5923ad4b | 710 | return 1; |
61ae935a MC |
711 | } |
712 | ||
713 | /* | |
714 | * Returns the maximum allowed length for the current message that we are | |
715 | * reading. Excludes the message header. | |
716 | */ | |
eda75751 | 717 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 718 | { |
d6f1a6e9 | 719 | OSSL_STATEM *st = &s->statem; |
61ae935a | 720 | |
a230b26e | 721 | switch (st->hand_state) { |
f3b3d7f0 RS |
722 | default: |
723 | /* Shouldn't happen */ | |
724 | return 0; | |
725 | ||
a230b26e EK |
726 | case TLS_ST_CR_SRVR_HELLO: |
727 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 728 | |
a230b26e EK |
729 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
730 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 731 | |
a230b26e EK |
732 | case TLS_ST_CR_CERT: |
733 | return s->max_cert_list; | |
61ae935a | 734 | |
a230b26e EK |
735 | case TLS_ST_CR_CERT_STATUS: |
736 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 737 | |
a230b26e EK |
738 | case TLS_ST_CR_KEY_EXCH: |
739 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 740 | |
a230b26e EK |
741 | case TLS_ST_CR_CERT_REQ: |
742 | /* | |
743 | * Set to s->max_cert_list for compatibility with previous releases. In | |
744 | * practice these messages can get quite long if servers are configured | |
745 | * to provide a long list of acceptable CAs | |
746 | */ | |
747 | return s->max_cert_list; | |
61ae935a | 748 | |
a230b26e EK |
749 | case TLS_ST_CR_SRVR_DONE: |
750 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 751 | |
a230b26e EK |
752 | case TLS_ST_CR_CHANGE: |
753 | if (s->version == DTLS1_BAD_VER) | |
754 | return 3; | |
755 | return CCS_MAX_LENGTH; | |
61ae935a | 756 | |
a230b26e EK |
757 | case TLS_ST_CR_SESSION_TICKET: |
758 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 759 | |
a230b26e EK |
760 | case TLS_ST_CR_FINISHED: |
761 | return FINISHED_MAX_LENGTH; | |
61ae935a | 762 | } |
61ae935a MC |
763 | } |
764 | ||
765 | /* | |
766 | * Process a message that the client has been received from the server. | |
767 | */ | |
8481f583 | 768 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 769 | { |
d6f1a6e9 | 770 | OSSL_STATEM *st = &s->statem; |
61ae935a | 771 | |
a230b26e | 772 | switch (st->hand_state) { |
f3b3d7f0 RS |
773 | default: |
774 | /* Shouldn't happen */ | |
775 | return MSG_PROCESS_ERROR; | |
776 | ||
a230b26e EK |
777 | case TLS_ST_CR_SRVR_HELLO: |
778 | return tls_process_server_hello(s, pkt); | |
61ae935a | 779 | |
a230b26e EK |
780 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
781 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 782 | |
a230b26e EK |
783 | case TLS_ST_CR_CERT: |
784 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 785 | |
a230b26e EK |
786 | case TLS_ST_CR_CERT_STATUS: |
787 | return tls_process_cert_status(s, pkt); | |
61ae935a | 788 | |
a230b26e EK |
789 | case TLS_ST_CR_KEY_EXCH: |
790 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 791 | |
a230b26e EK |
792 | case TLS_ST_CR_CERT_REQ: |
793 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 794 | |
a230b26e EK |
795 | case TLS_ST_CR_SRVR_DONE: |
796 | return tls_process_server_done(s, pkt); | |
61ae935a | 797 | |
a230b26e EK |
798 | case TLS_ST_CR_CHANGE: |
799 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 800 | |
a230b26e EK |
801 | case TLS_ST_CR_SESSION_TICKET: |
802 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 803 | |
a230b26e EK |
804 | case TLS_ST_CR_FINISHED: |
805 | return tls_process_finished(s, pkt); | |
61ae935a | 806 | } |
61ae935a MC |
807 | } |
808 | ||
809 | /* | |
810 | * Perform any further processing required following the receipt of a message | |
811 | * from the server | |
812 | */ | |
8481f583 | 813 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 814 | { |
d6f1a6e9 | 815 | OSSL_STATEM *st = &s->statem; |
61ae935a | 816 | |
a230b26e | 817 | switch (st->hand_state) { |
f3b3d7f0 RS |
818 | default: |
819 | /* Shouldn't happen */ | |
820 | return WORK_ERROR; | |
821 | ||
05c4f1d5 MC |
822 | case TLS_ST_CR_CERT_REQ: |
823 | return tls_prepare_client_certificate(s, wst); | |
824 | ||
61ae935a MC |
825 | #ifndef OPENSSL_NO_SCTP |
826 | case TLS_ST_CR_SRVR_DONE: | |
827 | /* We only get here if we are using SCTP and we are renegotiating */ | |
828 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
829 | s->s3->in_read_app_data = 2; | |
830 | s->rwstate = SSL_READING; | |
831 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
832 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 833 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
834 | return WORK_MORE_A; |
835 | } | |
fe3a3291 | 836 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
837 | return WORK_FINISHED_STOP; |
838 | #endif | |
61ae935a | 839 | } |
61ae935a MC |
840 | } |
841 | ||
7cea05dc | 842 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 843 | { |
2c7b4dbc | 844 | unsigned char *p; |
ec60ccc1 MC |
845 | size_t sess_id_len; |
846 | int i, protverr; | |
2c7b4dbc | 847 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 848 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
849 | SSL_COMP *comp; |
850 | #endif | |
b9908bf9 | 851 | SSL_SESSION *sess = s->session; |
0f113f3e | 852 | |
7cea05dc | 853 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
854 | /* Should not happen */ |
855 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 856 | return 0; |
2c7b4dbc | 857 | } |
0f113f3e | 858 | |
b9908bf9 | 859 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
860 | protverr = ssl_set_client_hello_version(s); |
861 | if (protverr != 0) { | |
862 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 863 | return 0; |
4fa52141 | 864 | } |
0f113f3e | 865 | |
a230b26e | 866 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 867 | /* |
b9908bf9 MC |
868 | * In the case of EAP-FAST, we can have a pre-shared |
869 | * "ticket" without a session ID. | |
0f113f3e | 870 | */ |
b9908bf9 MC |
871 | (!sess->session_id_length && !sess->tlsext_tick) || |
872 | (sess->not_resumable)) { | |
873 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 874 | return 0; |
b9908bf9 MC |
875 | } |
876 | /* else use the pre-loaded session */ | |
0f113f3e | 877 | |
b9908bf9 | 878 | p = s->s3->client_random; |
0f113f3e | 879 | |
b9908bf9 MC |
880 | /* |
881 | * for DTLS if client_random is initialized, reuse it, we are | |
882 | * required to use same upon reply to HelloVerify | |
883 | */ | |
884 | if (SSL_IS_DTLS(s)) { | |
885 | size_t idx; | |
886 | i = 1; | |
887 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
888 | if (p[idx]) { | |
889 | i = 0; | |
890 | break; | |
0f113f3e | 891 | } |
0f113f3e | 892 | } |
b9908bf9 MC |
893 | } else |
894 | i = 1; | |
0f113f3e | 895 | |
a230b26e | 896 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 897 | return 0; |
b9908bf9 | 898 | |
b9908bf9 MC |
899 | /*- |
900 | * version indicates the negotiated version: for example from | |
901 | * an SSLv2/v3 compatible client hello). The client_version | |
902 | * field is the maximum version we permit and it is also | |
903 | * used in RSA encrypted premaster secrets. Some servers can | |
904 | * choke if we initially report a higher version then | |
905 | * renegotiate to a lower one in the premaster secret. This | |
906 | * didn't happen with TLS 1.0 as most servers supported it | |
907 | * but it can with TLS 1.1 or later if the server only supports | |
908 | * 1.0. | |
909 | * | |
910 | * Possible scenario with previous logic: | |
911 | * 1. Client hello indicates TLS 1.2 | |
912 | * 2. Server hello says TLS 1.0 | |
913 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 914 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
915 | * 5. Server sends hello request to renegotiate. |
916 | * 6. Client hello indicates TLS v1.0 as we now | |
917 | * know that is maximum server supports. | |
918 | * 7. Server chokes on RSA encrypted premaster secret | |
919 | * containing version 1.0. | |
920 | * | |
921 | * For interoperability it should be OK to always use the | |
922 | * maximum version we support in client hello and then rely | |
923 | * on the checking of version to ensure the servers isn't | |
924 | * being inconsistent: for example initially negotiating with | |
925 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
926 | * client_version in client hello and not resetting it to | |
927 | * the negotiated version. | |
cd998837 MC |
928 | * |
929 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 930 | * supported_versions extension for the real supported versions. |
b9908bf9 | 931 | */ |
7acb8b64 | 932 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 933 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 934 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 935 | return 0; |
2c7b4dbc | 936 | } |
b9908bf9 MC |
937 | |
938 | /* Session ID */ | |
939 | if (s->new_session) | |
ec60ccc1 | 940 | sess_id_len = 0; |
b9908bf9 | 941 | else |
ec60ccc1 MC |
942 | sess_id_len = s->session->session_id_length; |
943 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 944 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
945 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
946 | sess_id_len)) | |
7cea05dc | 947 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 948 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 949 | return 0; |
b9908bf9 | 950 | } |
0f113f3e | 951 | |
b9908bf9 MC |
952 | /* cookie stuff for DTLS */ |
953 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 954 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 955 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 956 | s->d1->cookie_len)) { |
b9908bf9 | 957 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 958 | return 0; |
0f113f3e | 959 | } |
b9908bf9 MC |
960 | } |
961 | ||
962 | /* Ciphers supported */ | |
7cea05dc | 963 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 964 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 965 | return 0; |
2c7b4dbc MC |
966 | } |
967 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
968 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
969 | return 0; | |
970 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 971 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 972 | return 0; |
b9908bf9 | 973 | } |
0f113f3e | 974 | |
b9908bf9 | 975 | /* COMPRESSION */ |
7cea05dc | 976 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 977 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 978 | return 0; |
2c7b4dbc MC |
979 | } |
980 | #ifndef OPENSSL_NO_COMP | |
981 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
982 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
983 | for (i = 0; i < compnum; i++) { | |
984 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 985 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 986 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 987 | return 0; |
2c7b4dbc MC |
988 | } |
989 | } | |
b9908bf9 | 990 | } |
09b6c2ef | 991 | #endif |
2c7b4dbc | 992 | /* Add the NULL method */ |
7cea05dc | 993 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 994 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 995 | return 0; |
2c7b4dbc | 996 | } |
761772d7 | 997 | |
b9908bf9 MC |
998 | /* TLS extensions */ |
999 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1000 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
7cea05dc | 1001 | return 0; |
b9908bf9 | 1002 | } |
7cea05dc | 1003 | if (!WPACKET_start_sub_packet_u16(pkt) |
2c7b4dbc MC |
1004 | /* |
1005 | * If extensions are of zero length then we don't even add the | |
1006 | * extensions length bytes | |
1007 | */ | |
7cea05dc MC |
1008 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH) |
1009 | || !ssl_add_clienthello_tlsext(s, pkt, &al) | |
1010 | || !WPACKET_close(pkt)) { | |
b9908bf9 MC |
1011 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1012 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1013 | return 0; |
b9908bf9 | 1014 | } |
0f113f3e | 1015 | |
b9908bf9 | 1016 | return 1; |
0f113f3e | 1017 | } |
d02b48c6 | 1018 | |
be3583fa | 1019 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1020 | { |
1021 | int al; | |
cb150cbc | 1022 | size_t cookie_len; |
8ba708e5 MC |
1023 | PACKET cookiepkt; |
1024 | ||
1025 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1026 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1027 | al = SSL_AD_DECODE_ERROR; |
1028 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1029 | goto f_err; | |
1030 | } | |
1031 | ||
1032 | cookie_len = PACKET_remaining(&cookiepkt); | |
1033 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1034 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1035 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1036 | goto f_err; | |
1037 | } | |
1038 | ||
1039 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1040 | al = SSL_AD_DECODE_ERROR; | |
1041 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1042 | goto f_err; | |
1043 | } | |
1044 | s->d1->cookie_len = cookie_len; | |
1045 | ||
1046 | return MSG_PROCESS_FINISHED_READING; | |
1047 | f_err: | |
1048 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1049 | ossl_statem_set_error(s); |
8ba708e5 MC |
1050 | return MSG_PROCESS_ERROR; |
1051 | } | |
1052 | ||
be3583fa | 1053 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1054 | { |
1055 | STACK_OF(SSL_CIPHER) *sk; | |
1056 | const SSL_CIPHER *c; | |
73999b62 | 1057 | PACKET session_id; |
b9908bf9 | 1058 | size_t session_id_len; |
b6981744 | 1059 | const unsigned char *cipherchars; |
b9908bf9 MC |
1060 | int i, al = SSL_AD_INTERNAL_ERROR; |
1061 | unsigned int compression; | |
4fa52141 VD |
1062 | unsigned int sversion; |
1063 | int protverr; | |
b9908bf9 MC |
1064 | #ifndef OPENSSL_NO_COMP |
1065 | SSL_COMP *comp; | |
1066 | #endif | |
1067 | ||
4fa52141 VD |
1068 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1069 | al = SSL_AD_DECODE_ERROR; | |
1070 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1071 | goto f_err; | |
1072 | } | |
50932c4a | 1073 | |
4fa52141 VD |
1074 | protverr = ssl_choose_client_version(s, sversion); |
1075 | if (protverr != 0) { | |
1076 | al = SSL_AD_PROTOCOL_VERSION; | |
1077 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1078 | goto f_err; | |
0f113f3e | 1079 | } |
0f113f3e MC |
1080 | |
1081 | /* load the server hello data */ | |
1082 | /* load the server random */ | |
73999b62 | 1083 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1084 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1085 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1086 | goto f_err; |
1087 | } | |
0f113f3e MC |
1088 | |
1089 | s->hit = 0; | |
1090 | ||
fc5ce51d | 1091 | /* Get the session-id. */ |
71728dd8 MC |
1092 | if (!SSL_IS_TLS13(s)) { |
1093 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1094 | al = SSL_AD_DECODE_ERROR; | |
1095 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1096 | goto f_err; | |
1097 | } | |
1098 | session_id_len = PACKET_remaining(&session_id); | |
1099 | if (session_id_len > sizeof s->session->session_id | |
1100 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1101 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1102 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1103 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1104 | goto f_err; | |
1105 | } | |
1106 | } else { | |
1107 | session_id_len = 0; | |
0f113f3e | 1108 | } |
e481f9b9 | 1109 | |
73999b62 | 1110 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1111 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1112 | al = SSL_AD_DECODE_ERROR; |
1113 | goto f_err; | |
1114 | } | |
1115 | ||
0f113f3e | 1116 | /* |
6e3d0153 EK |
1117 | * Check if we can resume the session based on external pre-shared secret. |
1118 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1119 | * Resumption based on server-side state works with session IDs. | |
1120 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1121 | * works by overriding the SessionTicket extension at the application | |
1122 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1123 | * servers would honour the session ID.) Therefore, the session ID alone | |
1124 | * is not a reliable indicator of session resumption, so we first check if | |
1125 | * we can resume, and later peek at the next handshake message to see if the | |
1126 | * server wants to resume. | |
0f113f3e | 1127 | */ |
71728dd8 MC |
1128 | if (s->version >= TLS1_VERSION && !SSL_IS_TLS13(s) |
1129 | && s->tls_session_secret_cb && s->session->tlsext_tick) { | |
4a640fb6 | 1130 | const SSL_CIPHER *pref_cipher = NULL; |
8c1a5343 MC |
1131 | /* |
1132 | * s->session->master_key_length is a size_t, but this is an int for | |
1133 | * backwards compat reasons | |
1134 | */ | |
1135 | int master_key_length; | |
1136 | master_key_length = sizeof(s->session->master_key); | |
0f113f3e | 1137 | if (s->tls_session_secret_cb(s, s->session->master_key, |
8c1a5343 | 1138 | &master_key_length, |
0f113f3e | 1139 | NULL, &pref_cipher, |
8c1a5343 MC |
1140 | s->tls_session_secret_cb_arg) |
1141 | && master_key_length > 0) { | |
1142 | s->session->master_key_length = master_key_length; | |
0f113f3e | 1143 | s->session->cipher = pref_cipher ? |
50932c4a | 1144 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1145 | } else { |
b9908bf9 | 1146 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1147 | al = SSL_AD_INTERNAL_ERROR; |
1148 | goto f_err; | |
0f113f3e | 1149 | } |
50932c4a MC |
1150 | } |
1151 | ||
fc5ce51d EK |
1152 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1153 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1154 | session_id_len) == 0) { | |
0f113f3e MC |
1155 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1156 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1157 | /* actually a client application bug */ | |
1158 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1159 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1160 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1161 | goto f_err; | |
1162 | } | |
1163 | s->hit = 1; | |
6e3d0153 | 1164 | } else { |
0f113f3e | 1165 | /* |
6e3d0153 EK |
1166 | * If we were trying for session-id reuse but the server |
1167 | * didn't echo the ID, make a new SSL_SESSION. | |
1168 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1169 | * so the PAC-based session secret is always preserved. It'll be | |
1170 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1171 | */ |
1172 | if (s->session->session_id_length > 0) { | |
4f6eaa59 | 1173 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1174 | if (!ssl_get_new_session(s, 0)) { |
1175 | goto f_err; | |
1176 | } | |
1177 | } | |
50932c4a | 1178 | |
ccae4a15 | 1179 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1180 | s->session->session_id_length = session_id_len; |
1181 | /* session_id_len could be 0 */ | |
1182 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1183 | session_id_len); | |
0f113f3e | 1184 | } |
fc5ce51d | 1185 | |
ccae4a15 FI |
1186 | /* Session version and negotiated protocol version should match */ |
1187 | if (s->version != s->session->ssl_version) { | |
1188 | al = SSL_AD_PROTOCOL_VERSION; | |
1189 | ||
1190 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1191 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1192 | goto f_err; | |
1193 | } | |
1194 | ||
50932c4a | 1195 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1196 | if (c == NULL) { |
1197 | /* unknown cipher */ | |
1198 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1199 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1200 | goto f_err; |
1201 | } | |
0f113f3e | 1202 | /* |
3eb2aff4 KR |
1203 | * Now that we know the version, update the check to see if it's an allowed |
1204 | * version. | |
1205 | */ | |
1206 | s->s3->tmp.min_ver = s->version; | |
1207 | s->s3->tmp.max_ver = s->version; | |
1208 | /* | |
1209 | * If it is a disabled cipher we either didn't send it in client hello, | |
1210 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1211 | */ |
1212 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1213 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1214 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1215 | goto f_err; |
1216 | } | |
0f113f3e MC |
1217 | |
1218 | sk = ssl_get_ciphers_by_id(s); | |
1219 | i = sk_SSL_CIPHER_find(sk, c); | |
1220 | if (i < 0) { | |
1221 | /* we did not say we would use this cipher */ | |
1222 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1223 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1224 | goto f_err; |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * Depending on the session caching (internal/external), the cipher | |
1229 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1230 | * set and use it for comparison. | |
1231 | */ | |
1232 | if (s->session->cipher) | |
1233 | s->session->cipher_id = s->session->cipher->id; | |
1234 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1235 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1236 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1237 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1238 | goto f_err; | |
0f113f3e MC |
1239 | } |
1240 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1241 | /* lets get the compression algorithm */ |
1242 | /* COMPRESSION */ | |
71728dd8 MC |
1243 | if (!SSL_IS_TLS13(s)) { |
1244 | if (!PACKET_get_1(pkt, &compression)) { | |
1245 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1246 | al = SSL_AD_DECODE_ERROR; | |
1247 | goto f_err; | |
1248 | } | |
1249 | } else { | |
1250 | compression = 0; | |
50932c4a | 1251 | } |
71728dd8 | 1252 | |
09b6c2ef | 1253 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1254 | if (compression != 0) { |
0f113f3e | 1255 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1256 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1257 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1258 | goto f_err; | |
1259 | } | |
1260 | /* | |
1261 | * If compression is disabled we'd better not try to resume a session | |
1262 | * using compression. | |
1263 | */ | |
1264 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1265 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1266 | goto f_err; |
1267 | } | |
09b6c2ef | 1268 | #else |
fc5ce51d | 1269 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1270 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1271 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1272 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1273 | goto f_err; | |
1274 | } | |
fc5ce51d | 1275 | if (compression == 0) |
0f113f3e MC |
1276 | comp = NULL; |
1277 | else if (!ssl_allow_compression(s)) { | |
1278 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1279 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1280 | goto f_err; |
fc5ce51d EK |
1281 | } else { |
1282 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1283 | } | |
0f113f3e | 1284 | |
fc5ce51d | 1285 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1286 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1287 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1288 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1289 | goto f_err; | |
1290 | } else { | |
1291 | s->s3->tmp.new_compression = comp; | |
1292 | } | |
09b6c2ef | 1293 | #endif |
761772d7 | 1294 | |
0f113f3e | 1295 | /* TLS extensions */ |
73999b62 | 1296 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1297 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1298 | goto err; |
1299 | } | |
0f113f3e | 1300 | |
73999b62 | 1301 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1302 | /* wrong packet length */ |
1303 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1304 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1305 | goto f_err; |
1306 | } | |
8723588e MC |
1307 | #ifndef OPENSSL_NO_SCTP |
1308 | if (SSL_IS_DTLS(s) && s->hit) { | |
1309 | unsigned char sctpauthkey[64]; | |
1310 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1311 | ||
1312 | /* | |
1313 | * Add new shared key for SCTP-Auth, will be ignored if | |
1314 | * no SCTP used. | |
1315 | */ | |
141eb8c6 MC |
1316 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1317 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1318 | |
1319 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1320 | sizeof(sctpauthkey), |
1321 | labelbuffer, | |
1322 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
8723588e MC |
1323 | goto err; |
1324 | ||
1325 | BIO_ctrl(SSL_get_wbio(s), | |
1326 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1327 | sizeof(sctpauthkey), sctpauthkey); | |
1328 | } | |
1329 | #endif | |
1330 | ||
92760c21 MC |
1331 | /* |
1332 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1333 | * we're done with this message | |
1334 | */ | |
1335 | if (SSL_IS_TLS13(s) | |
1336 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1337 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1338 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1339 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1340 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1341 | al = SSL_AD_INTERNAL_ERROR; | |
1342 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1343 | goto f_err; | |
1344 | } | |
1345 | ||
b9908bf9 | 1346 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1347 | f_err: |
1348 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1349 | err: | |
fe3a3291 | 1350 | ossl_statem_set_error(s); |
b9908bf9 | 1351 | return MSG_PROCESS_ERROR; |
0f113f3e | 1352 | } |
d02b48c6 | 1353 | |
be3583fa | 1354 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1355 | { |
1356 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1357 | unsigned long cert_list_len, cert_len; | |
1358 | X509 *x = NULL; | |
b6981744 | 1359 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1360 | STACK_OF(X509) *sk = NULL; |
1361 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1362 | |
1363 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1364 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1365 | goto err; |
0f113f3e MC |
1366 | } |
1367 | ||
73999b62 | 1368 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
a230b26e | 1369 | || PACKET_remaining(pkt) != cert_list_len) { |
0f113f3e | 1370 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1371 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1372 | goto f_err; |
1373 | } | |
73999b62 MC |
1374 | while (PACKET_remaining(pkt)) { |
1375 | if (!PACKET_get_net_3(pkt, &cert_len) | |
a230b26e | 1376 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1377 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1378 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1379 | SSL_R_CERT_LENGTH_MISMATCH); |
1380 | goto f_err; | |
1381 | } | |
1382 | ||
df758a85 MC |
1383 | certstart = certbytes; |
1384 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1385 | if (x == NULL) { |
1386 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1387 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1388 | goto f_err; |
1389 | } | |
df758a85 | 1390 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1391 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1392 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1393 | SSL_R_CERT_LENGTH_MISMATCH); |
1394 | goto f_err; | |
1395 | } | |
1396 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1397 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1398 | goto err; |
0f113f3e MC |
1399 | } |
1400 | x = NULL; | |
0f113f3e MC |
1401 | } |
1402 | ||
1403 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1404 | /* |
1405 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1406 | * for client side verification of the server certificate to take place. | |
1407 | * However, historically the code has only checked that *any* flag is set | |
1408 | * to cause server verification to take place. Use of the other flags makes | |
1409 | * no sense in client mode. An attempt to clean up the semantics was | |
1410 | * reverted because at least one application *only* set | |
1411 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1412 | * server verification to take place, after the clean up it silently did | |
1413 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1414 | * sent to them because they are void functions. Therefore, we now use the | |
1415 | * (less clean) historic behaviour of performing validation if any flag is | |
1416 | * set. The *documented* interface remains the same. | |
1417 | */ | |
1418 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1419 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1420 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1421 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1422 | goto f_err; | |
1423 | } | |
1424 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1425 | if (i > 1) { | |
b9908bf9 | 1426 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1427 | al = SSL_AD_HANDSHAKE_FAILURE; |
1428 | goto f_err; | |
1429 | } | |
1430 | ||
c34b0f99 | 1431 | s->session->peer_chain = sk; |
0f113f3e MC |
1432 | /* |
1433 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1434 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1435 | */ |
1436 | x = sk_X509_value(sk, 0); | |
1437 | sk = NULL; | |
1438 | /* | |
1439 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1440 | */ | |
1441 | ||
8382fd3a | 1442 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1443 | |
55a9a16f | 1444 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1445 | x = NULL; |
1446 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1447 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1448 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1449 | goto f_err; | |
1450 | } | |
1451 | ||
1452 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1453 | if (i < 0) { |
0f113f3e MC |
1454 | x = NULL; |
1455 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1456 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1457 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1458 | goto f_err; | |
1459 | } | |
1460 | ||
55a9a16f | 1461 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 | 1462 | if (exp_idx >= 0 && i != exp_idx |
a230b26e EK |
1463 | && (exp_idx != SSL_PKEY_GOST_EC || |
1464 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1465 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1466 | x = NULL; |
1467 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1468 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1469 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1470 | goto f_err; | |
0f113f3e | 1471 | } |
a273c6ee | 1472 | s->session->peer_type = i; |
55a9a16f MC |
1473 | |
1474 | X509_free(s->session->peer); | |
05f0fb9f | 1475 | X509_up_ref(x); |
55a9a16f | 1476 | s->session->peer = x; |
0f113f3e MC |
1477 | s->session->verify_result = s->verify_result; |
1478 | ||
1479 | x = NULL; | |
b9908bf9 | 1480 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1481 | goto done; |
1482 | ||
0f113f3e | 1483 | f_err: |
66696478 | 1484 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1485 | err: |
fe3a3291 | 1486 | ossl_statem_set_error(s); |
66696478 | 1487 | done: |
0f113f3e MC |
1488 | X509_free(x); |
1489 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1490 | return ret; |
0f113f3e | 1491 | } |
d02b48c6 | 1492 | |
7dc1c647 | 1493 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1494 | { |
1495 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1496 | PACKET psk_identity_hint; |
02a74590 | 1497 | |
7dc1c647 MC |
1498 | /* PSK ciphersuites are preceded by an identity hint */ |
1499 | ||
1500 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1501 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1502 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1503 | return 0; |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * Store PSK identity hint for later use, hint is used in | |
1508 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1509 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1510 | * identity. | |
1511 | */ | |
1512 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1513 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1514 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1515 | return 0; |
1516 | } | |
02a74590 | 1517 | |
7dc1c647 MC |
1518 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1519 | OPENSSL_free(s->session->psk_identity_hint); | |
1520 | s->session->psk_identity_hint = NULL; | |
1521 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1522 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1523 | *al = SSL_AD_INTERNAL_ERROR; |
1524 | return 0; | |
1525 | } | |
1526 | ||
1527 | return 1; | |
1528 | #else | |
4fa88861 | 1529 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1530 | *al = SSL_AD_INTERNAL_ERROR; |
1531 | return 0; | |
02a74590 MC |
1532 | #endif |
1533 | } | |
1534 | ||
25c6c10c MC |
1535 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1536 | { | |
1537 | #ifndef OPENSSL_NO_SRP | |
1538 | PACKET prime, generator, salt, server_pub; | |
1539 | ||
1540 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1541 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1542 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1543 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1544 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1545 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1546 | return 0; |
1547 | } | |
1548 | ||
348240c6 | 1549 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1550 | if ((s->srp_ctx.N = |
1551 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1552 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1553 | || (s->srp_ctx.g = |
1554 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1555 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1556 | || (s->srp_ctx.s = |
1557 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1558 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1559 | || (s->srp_ctx.B = |
1560 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1561 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1562 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1563 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1564 | return 0; |
1565 | } | |
1566 | ||
1567 | if (!srp_verify_server_param(s, al)) { | |
1568 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1569 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1570 | return 0; |
1571 | } | |
1572 | ||
1573 | /* We must check if there is a certificate */ | |
a230b26e | 1574 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1575 | *pkey = X509_get0_pubkey(s->session->peer); |
1576 | ||
1577 | return 1; | |
1578 | #else | |
4fa88861 | 1579 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1580 | *al = SSL_AD_INTERNAL_ERROR; |
1581 | return 0; | |
1582 | #endif | |
1583 | } | |
1584 | ||
e01a610d MC |
1585 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1586 | { | |
1587 | #ifndef OPENSSL_NO_DH | |
1588 | PACKET prime, generator, pub_key; | |
1589 | EVP_PKEY *peer_tmp = NULL; | |
1590 | ||
1591 | DH *dh = NULL; | |
1592 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1593 | ||
1594 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1595 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1596 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1597 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1598 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1599 | return 0; |
1600 | } | |
1601 | ||
1602 | peer_tmp = EVP_PKEY_new(); | |
1603 | dh = DH_new(); | |
1604 | ||
1605 | if (peer_tmp == NULL || dh == NULL) { | |
1606 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1607 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1608 | goto err; |
1609 | } | |
1610 | ||
348240c6 MC |
1611 | /* TODO(size_t): Convert these calls */ |
1612 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1613 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1614 | NULL); | |
1615 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1616 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1617 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1618 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1619 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1620 | goto err; |
1621 | } | |
1622 | ||
1623 | if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) { | |
1624 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1625 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1626 | goto err; |
1627 | } | |
1628 | ||
1629 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1630 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1631 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1632 | goto err; |
1633 | } | |
1634 | p = g = NULL; | |
1635 | ||
1636 | if (!DH_set0_key(dh, bnpub_key, NULL)) { | |
1637 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1638 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1639 | goto err; |
1640 | } | |
1641 | bnpub_key = NULL; | |
1642 | ||
1643 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1644 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1645 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1646 | goto err; |
1647 | } | |
1648 | ||
1649 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1650 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1651 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1652 | goto err; |
1653 | } | |
1654 | ||
1655 | s->s3->peer_tmp = peer_tmp; | |
1656 | ||
1657 | /* | |
1658 | * FIXME: This makes assumptions about which ciphersuites come with | |
1659 | * public keys. We should have a less ad-hoc way of doing this | |
1660 | */ | |
a230b26e | 1661 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1662 | *pkey = X509_get0_pubkey(s->session->peer); |
1663 | /* else anonymous DH, so no certificate or pkey. */ | |
1664 | ||
1665 | return 1; | |
1666 | ||
1667 | err: | |
1668 | BN_free(p); | |
1669 | BN_free(g); | |
1670 | BN_free(bnpub_key); | |
1671 | DH_free(dh); | |
1672 | EVP_PKEY_free(peer_tmp); | |
1673 | ||
1674 | return 0; | |
1675 | #else | |
4fa88861 | 1676 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1677 | *al = SSL_AD_INTERNAL_ERROR; |
1678 | return 0; | |
1679 | #endif | |
1680 | } | |
1681 | ||
ff74aeb1 MC |
1682 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1683 | { | |
1684 | #ifndef OPENSSL_NO_EC | |
1685 | PACKET encoded_pt; | |
1686 | const unsigned char *ecparams; | |
1687 | int curve_nid; | |
ec24630a | 1688 | unsigned int curve_flags; |
ff74aeb1 MC |
1689 | EVP_PKEY_CTX *pctx = NULL; |
1690 | ||
1691 | /* | |
1692 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1693 | * public key. For now we only support named (not generic) curves and | |
1694 | * ECParameters in this case is just three bytes. | |
1695 | */ | |
1696 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1697 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1698 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1699 | return 0; |
1700 | } | |
1701 | /* | |
1702 | * Check curve is one of our preferences, if not server has sent an | |
1703 | * invalid curve. ECParameters is 3 bytes. | |
1704 | */ | |
1705 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1706 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1707 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1708 | return 0; |
1709 | } | |
1710 | ||
ec24630a DSH |
1711 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1712 | ||
a230b26e | 1713 | if (curve_nid == 0) { |
ff74aeb1 | 1714 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1715 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1716 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1717 | return 0; | |
1718 | } | |
1719 | ||
ec24630a DSH |
1720 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1721 | EVP_PKEY *key = EVP_PKEY_new(); | |
1722 | ||
1723 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1724 | *al = SSL_AD_INTERNAL_ERROR; | |
1725 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1726 | EVP_PKEY_free(key); | |
1727 | return 0; | |
1728 | } | |
1729 | s->s3->peer_tmp = key; | |
1730 | } else { | |
1731 | /* Set up EVP_PKEY with named curve as parameters */ | |
1732 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1733 | if (pctx == NULL | |
1734 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1735 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1736 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1737 | *al = SSL_AD_INTERNAL_ERROR; | |
1738 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1739 | EVP_PKEY_CTX_free(pctx); | |
1740 | return 0; | |
1741 | } | |
ff74aeb1 | 1742 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1743 | pctx = NULL; |
ff74aeb1 | 1744 | } |
ff74aeb1 MC |
1745 | |
1746 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1747 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1748 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1749 | return 0; |
1750 | } | |
1751 | ||
ec24630a DSH |
1752 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1753 | PACKET_data(&encoded_pt), | |
1754 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1755 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1756 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1757 | return 0; |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1762 | * ECParameters in the server key exchange message. We do support RSA | |
1763 | * and ECDSA. | |
1764 | */ | |
1765 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1766 | *pkey = X509_get0_pubkey(s->session->peer); | |
1767 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1768 | *pkey = X509_get0_pubkey(s->session->peer); | |
1769 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1770 | ||
1771 | return 1; | |
1772 | #else | |
4fa88861 | 1773 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1774 | *al = SSL_AD_INTERNAL_ERROR; |
1775 | return 0; | |
1776 | #endif | |
1777 | } | |
1778 | ||
be3583fa | 1779 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1780 | { |
7dc1c647 | 1781 | int al = -1; |
e1e588ac | 1782 | long alg_k; |
b9908bf9 | 1783 | EVP_PKEY *pkey = NULL; |
73999b62 | 1784 | PACKET save_param_start, signature; |
b9908bf9 | 1785 | |
b9908bf9 MC |
1786 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1787 | ||
73999b62 | 1788 | save_param_start = *pkt; |
8d92c1f8 | 1789 | |
3260adf1 | 1790 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1791 | EVP_PKEY_free(s->s3->peer_tmp); |
1792 | s->s3->peer_tmp = NULL; | |
3260adf1 | 1793 | #endif |
d02b48c6 | 1794 | |
7689082b | 1795 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
1796 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
1797 | goto err; | |
7689082b DSH |
1798 | } |
1799 | ||
1800 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1801 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
1802 | } else if (alg_k & SSL_kSRP) { |
1803 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 1804 | goto err; |
e01a610d MC |
1805 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
1806 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
1807 | goto err; | |
ff74aeb1 MC |
1808 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
1809 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
1810 | goto err; | |
0f113f3e MC |
1811 | } else if (alg_k) { |
1812 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1813 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 1814 | goto err; |
0f113f3e | 1815 | } |
0f113f3e | 1816 | |
0f113f3e MC |
1817 | /* if it was signed, check the signature */ |
1818 | if (pkey != NULL) { | |
32942870 | 1819 | PACKET params; |
be8dba2c MC |
1820 | int maxsig; |
1821 | const EVP_MD *md = NULL; | |
e1e588ac MC |
1822 | EVP_MD_CTX *md_ctx; |
1823 | ||
32942870 EK |
1824 | /* |
1825 | * |pkt| now points to the beginning of the signature, so the difference | |
1826 | * equals the length of the parameters. | |
1827 | */ | |
1828 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1829 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1830 | PACKET_remaining(pkt))) { |
32942870 | 1831 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1832 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1833 | goto err; |
32942870 EK |
1834 | } |
1835 | ||
0f113f3e | 1836 | if (SSL_USE_SIGALGS(s)) { |
b6981744 | 1837 | const unsigned char *sigalgs; |
0f113f3e | 1838 | int rv; |
73999b62 | 1839 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
e1e588ac | 1840 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1841 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 1842 | goto err; |
0f113f3e | 1843 | } |
32942870 | 1844 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
e1e588ac MC |
1845 | if (rv == -1) { |
1846 | al = SSL_AD_INTERNAL_ERROR; | |
1847 | goto err; | |
1848 | } else if (rv == 0) { | |
1849 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 1850 | goto err; |
0f113f3e | 1851 | } |
a2f9200f | 1852 | #ifdef SSL_DEBUG |
0f113f3e MC |
1853 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1854 | #endif | |
3aeb9348 | 1855 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1856 | md = EVP_md5_sha1(); |
32942870 | 1857 | } else { |
0f113f3e | 1858 | md = EVP_sha1(); |
32942870 | 1859 | } |
0f113f3e | 1860 | |
73999b62 MC |
1861 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1862 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 1863 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1864 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 1865 | goto err; |
0f113f3e | 1866 | } |
be8dba2c MC |
1867 | maxsig = EVP_PKEY_size(pkey); |
1868 | if (maxsig < 0) { | |
e1e588ac | 1869 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1870 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1871 | goto err; |
8098fc56 | 1872 | } |
0f113f3e MC |
1873 | |
1874 | /* | |
8098fc56 | 1875 | * Check signature length |
0f113f3e | 1876 | */ |
be8dba2c | 1877 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 1878 | /* wrong packet length */ |
e1e588ac | 1879 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
1880 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
1881 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
1882 | goto err; |
1883 | } | |
1884 | ||
1885 | md_ctx = EVP_MD_CTX_new(); | |
1886 | if (md_ctx == NULL) { | |
1887 | al = SSL_AD_INTERNAL_ERROR; | |
1888 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1889 | goto err; | |
0f113f3e | 1890 | } |
e1e588ac | 1891 | |
6e59a892 | 1892 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
a230b26e EK |
1893 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), |
1894 | SSL3_RANDOM_SIZE) <= 0 | |
1895 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
1896 | SSL3_RANDOM_SIZE) <= 0 | |
1897 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), | |
1898 | PACKET_remaining(¶ms)) <= 0) { | |
e1e588ac | 1899 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1900 | al = SSL_AD_INTERNAL_ERROR; |
1901 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 1902 | goto err; |
192e4bbb | 1903 | } |
348240c6 | 1904 | /* TODO(size_t): Convert this call */ |
6e59a892 | 1905 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
348240c6 MC |
1906 | (unsigned int)PACKET_remaining(&signature), |
1907 | pkey) <= 0) { | |
192e4bbb | 1908 | /* bad signature */ |
e1e588ac | 1909 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1910 | al = SSL_AD_DECRYPT_ERROR; |
1911 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 1912 | goto err; |
0f113f3e | 1913 | } |
e1e588ac | 1914 | EVP_MD_CTX_free(md_ctx); |
0f113f3e | 1915 | } else { |
7689082b | 1916 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 1917 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 1918 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 1919 | /* Might be wrong key type, check it */ |
e1e588ac | 1920 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 1921 | /* Otherwise this shouldn't happen */ |
e1e588ac | 1922 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1923 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
1924 | } else { |
1925 | al = SSL_AD_DECODE_ERROR; | |
1926 | } | |
0f113f3e MC |
1927 | goto err; |
1928 | } | |
1929 | /* still data left over */ | |
73999b62 | 1930 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 1931 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1932 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 1933 | goto err; |
0f113f3e MC |
1934 | } |
1935 | } | |
e1e588ac | 1936 | |
b9908bf9 | 1937 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 1938 | err: |
7dc1c647 MC |
1939 | if (al != -1) |
1940 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1941 | ossl_statem_set_error(s); |
b9908bf9 | 1942 | return MSG_PROCESS_ERROR; |
0f113f3e | 1943 | } |
d02b48c6 | 1944 | |
be3583fa | 1945 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1946 | { |
1947 | int ret = MSG_PROCESS_ERROR; | |
1948 | unsigned int list_len, ctype_num, i, name_len; | |
1949 | X509_NAME *xn = NULL; | |
b6981744 EK |
1950 | const unsigned char *data; |
1951 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 1952 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
1953 | |
1954 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1955 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1956 | goto err; |
1957 | } | |
1958 | ||
1959 | /* get the certificate types */ | |
73999b62 | 1960 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 1961 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 1962 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1963 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1964 | goto err; |
1965 | } | |
b548a1f1 RS |
1966 | OPENSSL_free(s->cert->ctypes); |
1967 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1968 | if (ctype_num > SSL3_CT_NUMBER) { |
1969 | /* If we exceed static buffer copy all to cert structure */ | |
1970 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1971 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1972 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1973 | goto err; |
1974 | } | |
ac112332 | 1975 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 1976 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
1977 | ctype_num = SSL3_CT_NUMBER; |
1978 | } | |
1979 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1980 | s->s3->tmp.ctype[i] = data[i]; |
1981 | ||
0f113f3e | 1982 | if (SSL_USE_SIGALGS(s)) { |
73999b62 | 1983 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 1984 | || !PACKET_get_bytes(pkt, &data, list_len)) { |
0f113f3e | 1985 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1986 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1987 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1988 | goto err; |
1989 | } | |
ac112332 | 1990 | |
0f113f3e MC |
1991 | /* Clear certificate digests and validity flags */ |
1992 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 1993 | s->s3->tmp.md[i] = NULL; |
6383d316 | 1994 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 1995 | } |
ac112332 | 1996 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 1997 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1998 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1999 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2000 | goto err; | |
2001 | } | |
2002 | if (!tls1_process_sigalgs(s)) { | |
2003 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2004 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2005 | goto err; |
2006 | } | |
a0f63828 DSH |
2007 | } else { |
2008 | ssl_set_default_md(s); | |
0f113f3e MC |
2009 | } |
2010 | ||
2011 | /* get the CA RDNs */ | |
73999b62 | 2012 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2013 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2014 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2015 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2016 | goto err; |
2017 | } | |
2018 | ||
73999b62 MC |
2019 | while (PACKET_remaining(pkt)) { |
2020 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2021 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2022 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2023 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2024 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2025 | goto err; |
2026 | } | |
2027 | ||
ac112332 | 2028 | namestart = namebytes; |
0f113f3e | 2029 | |
ac112332 MC |
2030 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2031 | name_len)) == NULL) { | |
3c33c6f6 | 2032 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2033 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2034 | goto err; |
0f113f3e MC |
2035 | } |
2036 | ||
ac112332 | 2037 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2038 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2039 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2040 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2041 | goto err; | |
2042 | } | |
2043 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2044 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2045 | goto err; |
2046 | } | |
6afef8b1 | 2047 | xn = NULL; |
0f113f3e MC |
2048 | } |
2049 | ||
0f113f3e MC |
2050 | /* we should setup a certificate to return.... */ |
2051 | s->s3->tmp.cert_req = 1; | |
2052 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2053 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2054 | s->s3->tmp.ca_names = ca_sk; |
2055 | ca_sk = NULL; | |
2056 | ||
05c4f1d5 | 2057 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2058 | goto done; |
0f113f3e | 2059 | err: |
fe3a3291 | 2060 | ossl_statem_set_error(s); |
cc273a93 | 2061 | done: |
6afef8b1 | 2062 | X509_NAME_free(xn); |
222561fe | 2063 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2064 | return ret; |
0f113f3e MC |
2065 | } |
2066 | ||
2067 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2068 | { |
0f113f3e | 2069 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2070 | } |
dfeab068 | 2071 | |
be3583fa | 2072 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2073 | { |
2074 | int al; | |
2075 | unsigned int ticklen; | |
2076 | unsigned long ticket_lifetime_hint; | |
ec60ccc1 | 2077 | unsigned int sess_len; |
b9908bf9 | 2078 | |
73999b62 | 2079 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
a230b26e EK |
2080 | || !PACKET_get_net_2(pkt, &ticklen) |
2081 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2082 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2083 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2084 | goto f_err; |
2085 | } | |
2086 | ||
2087 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2088 | if (ticklen == 0) | |
c9de4a20 | 2089 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2090 | |
98ece4ee MC |
2091 | if (s->session->session_id_length > 0) { |
2092 | int i = s->session_ctx->session_cache_mode; | |
2093 | SSL_SESSION *new_sess; | |
2094 | /* | |
2095 | * We reused an existing session, so we need to replace it with a new | |
2096 | * one | |
2097 | */ | |
2098 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2099 | /* | |
e4612d02 | 2100 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2101 | */ |
e4612d02 | 2102 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2103 | } |
2104 | ||
2105 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2106 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2107 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2108 | goto f_err; |
2109 | } | |
2110 | ||
2111 | SSL_SESSION_free(s->session); | |
2112 | s->session = new_sess; | |
2113 | } | |
2114 | ||
b548a1f1 RS |
2115 | OPENSSL_free(s->session->tlsext_tick); |
2116 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2117 | |
0f113f3e | 2118 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 2119 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 2120 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2121 | goto err; |
2122 | } | |
73999b62 | 2123 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2124 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2125 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2126 | goto f_err; |
2127 | } | |
e711da71 EK |
2128 | |
2129 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2130 | s->session->tlsext_ticklen = ticklen; |
2131 | /* | |
2132 | * There are two ways to detect a resumed ticket session. One is to set | |
2133 | * an appropriate session ID and then the server must return a match in | |
2134 | * ServerHello. This allows the normal client session ID matching to work | |
2135 | * and we know much earlier that the ticket has been accepted. The | |
2136 | * other way is to set zero length session ID when the ticket is | |
2137 | * presented and rely on the handshake to determine session resumption. | |
2138 | * We choose the former approach because this fits in with assumptions | |
2139 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2140 | * SHA256 is disabled) hash of the ticket. | |
2141 | */ | |
ec60ccc1 MC |
2142 | /* |
2143 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2144 | * but s->session->session_id_length is a size_t | |
2145 | */ | |
d166ed8c | 2146 | if (!EVP_Digest(s->session->tlsext_tick, ticklen, |
ec60ccc1 | 2147 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2148 | EVP_sha256(), NULL)) { |
2149 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2150 | goto err; | |
2151 | } | |
ec60ccc1 | 2152 | s->session->session_id_length = sess_len; |
b9908bf9 | 2153 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2154 | f_err: |
2155 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2156 | err: | |
fe3a3291 | 2157 | ossl_statem_set_error(s); |
b9908bf9 | 2158 | return MSG_PROCESS_ERROR; |
0f113f3e | 2159 | } |
67c8e7f4 | 2160 | |
be3583fa | 2161 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2162 | { |
2163 | int al; | |
8b0e934a | 2164 | size_t resplen; |
b9908bf9 | 2165 | unsigned int type; |
b9908bf9 | 2166 | |
73999b62 | 2167 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2168 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2169 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2170 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2171 | goto f_err; |
2172 | } | |
56a26ce3 MC |
2173 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2174 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2175 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2176 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2177 | goto f_err; |
2178 | } | |
ac63710a | 2179 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2180 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2181 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2182 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2183 | goto f_err; |
2184 | } | |
73999b62 | 2185 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2186 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2187 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2188 | goto f_err; |
2189 | } | |
0f113f3e | 2190 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2191 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2192 | f_err: |
2193 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2194 | ossl_statem_set_error(s); |
b9908bf9 | 2195 | return MSG_PROCESS_ERROR; |
0f113f3e | 2196 | } |
d02b48c6 | 2197 | |
7776a36c MC |
2198 | /* |
2199 | * Perform miscellaneous checks and processing after we have received the | |
2200 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2201 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2202 | * on failure. | |
7776a36c MC |
2203 | */ |
2204 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2205 | { |
a455d0f6 MC |
2206 | /* |
2207 | * at this point we check that we have the required stuff from | |
2208 | * the server | |
2209 | */ | |
2210 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2211 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2212 | return 0; | |
a455d0f6 MC |
2213 | } |
2214 | ||
bb1aaab4 MC |
2215 | /* |
2216 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2217 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2218 | * message, or NULL and -1 otherwise | |
2219 | */ | |
b1931d43 | 2220 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2221 | int ret; |
2222 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2223 | if (ret == 0) { | |
7776a36c MC |
2224 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2225 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2226 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2227 | return 0; |
bb1aaab4 MC |
2228 | } |
2229 | if (ret < 0) { | |
7776a36c MC |
2230 | *al = SSL_AD_INTERNAL_ERROR; |
2231 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2232 | ERR_R_MALLOC_FAILURE); | |
2233 | return 0; | |
bb1aaab4 MC |
2234 | } |
2235 | } | |
ed29e82a RP |
2236 | #ifndef OPENSSL_NO_CT |
2237 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2238 | /* Note we validate the SCTs whether or not we abort on error */ |
2239 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2240 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2241 | return 0; | |
ed29e82a RP |
2242 | } |
2243 | } | |
2244 | #endif | |
2245 | ||
7776a36c MC |
2246 | return 1; |
2247 | } | |
2248 | ||
2249 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2250 | { | |
2251 | int al = SSL_AD_INTERNAL_ERROR; | |
2252 | ||
2253 | if (PACKET_remaining(pkt) > 0) { | |
2254 | /* should contain no data */ | |
2255 | al = SSL_AD_DECODE_ERROR; | |
2256 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2257 | goto err; | |
2258 | } | |
2259 | #ifndef OPENSSL_NO_SRP | |
2260 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2261 | if (SRP_Calc_A_param(s) <= 0) { | |
2262 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2263 | goto err; | |
2264 | } | |
2265 | } | |
2266 | #endif | |
2267 | ||
2268 | /* | |
2269 | * Error queue messages are generated directly by this function | |
2270 | */ | |
2271 | if (!tls_process_initial_server_flight(s, &al)) | |
2272 | goto err; | |
2273 | ||
473483d4 MC |
2274 | #ifndef OPENSSL_NO_SCTP |
2275 | /* Only applies to renegotiation */ | |
2276 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2277 | && s->renegotiate != 0) |
473483d4 MC |
2278 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2279 | else | |
2280 | #endif | |
2281 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2282 | |
2283 | err: | |
2284 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2285 | ossl_statem_set_error(s); | |
2286 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2287 | } |
176f31dd | 2288 | |
f1ec23c0 | 2289 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2290 | { |
7689082b | 2291 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2292 | int ret = 0; |
2293 | /* | |
2294 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2295 | * \0-terminated identity. The last byte is for us for simulating | |
2296 | * strnlen. | |
2297 | */ | |
2298 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2299 | size_t identitylen = 0; | |
2300 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2301 | unsigned char *tmppsk = NULL; | |
2302 | char *tmpidentity = NULL; | |
2303 | size_t psklen = 0; | |
2304 | ||
2305 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2306 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2307 | *al = SSL_AD_INTERNAL_ERROR; |
2308 | goto err; | |
2309 | } | |
d02b48c6 | 2310 | |
13c0ec4a | 2311 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2312 | |
13c0ec4a MC |
2313 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2314 | identity, sizeof(identity) - 1, | |
2315 | psk, sizeof(psk)); | |
7689082b | 2316 | |
13c0ec4a | 2317 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2318 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2319 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2320 | goto err; | |
2321 | } else if (psklen == 0) { | |
05ec6a25 | 2322 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2323 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2324 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2325 | goto err; | |
2326 | } | |
7689082b | 2327 | |
13c0ec4a MC |
2328 | identitylen = strlen(identity); |
2329 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2330 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2331 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2332 | goto err; | |
2333 | } | |
7689082b | 2334 | |
13c0ec4a MC |
2335 | tmppsk = OPENSSL_memdup(psk, psklen); |
2336 | tmpidentity = OPENSSL_strdup(identity); | |
2337 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2338 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2339 | *al = SSL_AD_INTERNAL_ERROR; |
2340 | goto err; | |
2341 | } | |
7689082b | 2342 | |
13c0ec4a MC |
2343 | OPENSSL_free(s->s3->tmp.psk); |
2344 | s->s3->tmp.psk = tmppsk; | |
2345 | s->s3->tmp.psklen = psklen; | |
2346 | tmppsk = NULL; | |
2347 | OPENSSL_free(s->session->psk_identity); | |
2348 | s->session->psk_identity = tmpidentity; | |
2349 | tmpidentity = NULL; | |
f1ec23c0 | 2350 | |
b2b3024e | 2351 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2352 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2353 | *al = SSL_AD_INTERNAL_ERROR; | |
2354 | goto err; | |
2355 | } | |
7689082b | 2356 | |
13c0ec4a | 2357 | ret = 1; |
0bce0b02 | 2358 | |
13c0ec4a MC |
2359 | err: |
2360 | OPENSSL_cleanse(psk, psklen); | |
2361 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2362 | OPENSSL_clear_free(tmppsk, psklen); | |
2363 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2364 | |
13c0ec4a MC |
2365 | return ret; |
2366 | #else | |
05ec6a25 | 2367 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2368 | *al = SSL_AD_INTERNAL_ERROR; |
2369 | return 0; | |
b9908bf9 | 2370 | #endif |
13c0ec4a | 2371 | } |
b9908bf9 | 2372 | |
f1ec23c0 | 2373 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2374 | { |
bc36ee62 | 2375 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2376 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2377 | EVP_PKEY *pkey = NULL; |
2378 | EVP_PKEY_CTX *pctx = NULL; | |
2379 | size_t enclen; | |
2380 | unsigned char *pms = NULL; | |
2381 | size_t pmslen = 0; | |
b9908bf9 | 2382 | |
13c0ec4a MC |
2383 | if (s->session->peer == NULL) { |
2384 | /* | |
2385 | * We should always have a server certificate with SSL_kRSA. | |
2386 | */ | |
05ec6a25 | 2387 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2388 | return 0; |
2389 | } | |
0f113f3e | 2390 | |
13c0ec4a MC |
2391 | pkey = X509_get0_pubkey(s->session->peer); |
2392 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2393 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2394 | return 0; |
2395 | } | |
0f113f3e | 2396 | |
13c0ec4a MC |
2397 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2398 | pms = OPENSSL_malloc(pmslen); | |
2399 | if (pms == NULL) { | |
05ec6a25 | 2400 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2401 | *al = SSL_AD_INTERNAL_ERROR; |
2402 | return 0; | |
2403 | } | |
0bce0b02 | 2404 | |
13c0ec4a MC |
2405 | pms[0] = s->client_version >> 8; |
2406 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2407 | /* TODO(size_t): Convert this function */ |
2408 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2409 | goto err; |
2410 | } | |
0f113f3e | 2411 | |
13c0ec4a | 2412 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2413 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2414 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2415 | goto err; | |
2416 | } | |
13c0ec4a MC |
2417 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2418 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2419 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2420 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2421 | goto err; |
2422 | } | |
f1ec23c0 MC |
2423 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2424 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2425 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2426 | goto err; |
2427 | } | |
13c0ec4a MC |
2428 | EVP_PKEY_CTX_free(pctx); |
2429 | pctx = NULL; | |
0f113f3e | 2430 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2431 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2432 | (*p)[1]++; | |
2433 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2434 | tmp_buf[0] = 0x70; | |
0f113f3e | 2435 | # endif |
0f113f3e | 2436 | |
13c0ec4a | 2437 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2438 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2439 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2440 | goto err; | |
b9908bf9 | 2441 | } |
13c0ec4a MC |
2442 | |
2443 | s->s3->tmp.pms = pms; | |
2444 | s->s3->tmp.pmslen = pmslen; | |
2445 | ||
2446 | return 1; | |
2447 | err: | |
2448 | OPENSSL_clear_free(pms, pmslen); | |
2449 | EVP_PKEY_CTX_free(pctx); | |
2450 | ||
2451 | return 0; | |
2452 | #else | |
05ec6a25 | 2453 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2454 | *al = SSL_AD_INTERNAL_ERROR; |
2455 | return 0; | |
f9b3bff6 | 2456 | #endif |
13c0ec4a MC |
2457 | } |
2458 | ||
f1ec23c0 | 2459 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2460 | { |
2461 | #ifndef OPENSSL_NO_DH | |
2462 | DH *dh_clnt = NULL; | |
2463 | const BIGNUM *pub_key; | |
2464 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2465 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2466 | |
2467 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2468 | if (skey == NULL) |
2469 | goto err; | |
2470 | ||
0a699a07 | 2471 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2472 | if (ckey == NULL) |
2473 | goto err; | |
2474 | ||
a8c1c704 MC |
2475 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2476 | ||
0f1e51ea | 2477 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2478 | goto err; |
a8c1c704 MC |
2479 | |
2480 | /* send off the data */ | |
2481 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2482 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2483 | goto err; |
2484 | ||
2485 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2486 | EVP_PKEY_free(ckey); |
2487 | ||
2488 | return 1; | |
f1ec23c0 MC |
2489 | err: |
2490 | EVP_PKEY_free(ckey); | |
2491 | #endif | |
05ec6a25 | 2492 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2493 | *al = SSL_AD_INTERNAL_ERROR; |
2494 | return 0; | |
a8c1c704 MC |
2495 | } |
2496 | ||
f1ec23c0 | 2497 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2498 | { |
2499 | #ifndef OPENSSL_NO_EC | |
2500 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2501 | size_t encoded_pt_len = 0; |
67ad5aab | 2502 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2503 | int ret = 0; |
67ad5aab MC |
2504 | |
2505 | skey = s->s3->peer_tmp; | |
ec24630a | 2506 | if (skey == NULL) { |
05ec6a25 | 2507 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2508 | return 0; |
2509 | } | |
2510 | ||
0a699a07 | 2511 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2512 | if (ckey == NULL) { |
2513 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2514 | goto err; | |
2515 | } | |
67ad5aab | 2516 | |
0f1e51ea | 2517 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2518 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2519 | goto err; |
2520 | } | |
2521 | ||
2522 | /* Generate encoding of client key */ | |
ec24630a | 2523 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2524 | |
2525 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2526 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2527 | goto err; |
2528 | } | |
2529 | ||
b2b3024e | 2530 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2531 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2532 | goto err; | |
2533 | } | |
67ad5aab | 2534 | |
f1ec23c0 | 2535 | ret = 1; |
67ad5aab | 2536 | err: |
f1ec23c0 | 2537 | OPENSSL_free(encodedPoint); |
67ad5aab | 2538 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2539 | return ret; |
67ad5aab | 2540 | #else |
05ec6a25 | 2541 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2542 | *al = SSL_AD_INTERNAL_ERROR; |
2543 | return 0; | |
2544 | #endif | |
2545 | } | |
2546 | ||
f1ec23c0 | 2547 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2548 | { |
2549 | #ifndef OPENSSL_NO_GOST | |
2550 | /* GOST key exchange message creation */ | |
2551 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2552 | X509 *peer_cert; | |
2553 | size_t msglen; | |
2554 | unsigned int md_len; | |
2555 | unsigned char shared_ukm[32], tmp[256]; | |
2556 | EVP_MD_CTX *ukm_hash = NULL; | |
2557 | int dgst_nid = NID_id_GostR3411_94; | |
2558 | unsigned char *pms = NULL; | |
2559 | size_t pmslen = 0; | |
2560 | ||
2561 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2562 | dgst_nid = NID_id_GostR3411_2012_256; | |
2563 | ||
2564 | /* | |
2565 | * Get server sertificate PKEY and create ctx from it | |
2566 | */ | |
2567 | peer_cert = s->session->peer; | |
2568 | if (!peer_cert) { | |
2569 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2570 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2571 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2572 | return 0; | |
2573 | } | |
2574 | ||
2575 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2576 | if (pkey_ctx == NULL) { | |
2577 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2578 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2579 | return 0; |
2580 | } | |
2581 | /* | |
2582 | * If we have send a certificate, and certificate key | |
2583 | * parameters match those of server certificate, use | |
2584 | * certificate key for key exchange | |
2585 | */ | |
2586 | ||
2587 | /* Otherwise, generate ephemeral key pair */ | |
2588 | pmslen = 32; | |
2589 | pms = OPENSSL_malloc(pmslen); | |
2590 | if (pms == NULL) { | |
2591 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2592 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2593 | goto err; |
e00e0b3d MC |
2594 | } |
2595 | ||
2596 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2597 | /* Generate session key |
2598 | * TODO(size_t): Convert this function | |
2599 | */ | |
2600 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2601 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2602 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2603 | goto err; |
2604 | }; | |
e00e0b3d MC |
2605 | /* |
2606 | * Compute shared IV and store it in algorithm-specific context | |
2607 | * data | |
2608 | */ | |
2609 | ukm_hash = EVP_MD_CTX_new(); | |
2610 | if (ukm_hash == NULL | |
a230b26e EK |
2611 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2612 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2613 | SSL3_RANDOM_SIZE) <= 0 | |
2614 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2615 | SSL3_RANDOM_SIZE) <= 0 | |
2616 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2617 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2618 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2619 | goto err; |
2620 | } | |
2621 | EVP_MD_CTX_free(ukm_hash); | |
2622 | ukm_hash = NULL; | |
2623 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2624 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2625 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2626 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2627 | goto err; |
2628 | } | |
2629 | /* Make GOST keytransport blob message */ | |
2630 | /* | |
2631 | * Encapsulate it into sequence | |
2632 | */ | |
e00e0b3d MC |
2633 | msglen = 255; |
2634 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2635 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2636 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2637 | goto err; |
2638 | } | |
f1ec23c0 | 2639 | |
08029dfa MC |
2640 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2641 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2642 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2643 | *al = SSL_AD_INTERNAL_ERROR; |
2644 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2645 | goto err; | |
e00e0b3d | 2646 | } |
f1ec23c0 | 2647 | |
e00e0b3d MC |
2648 | EVP_PKEY_CTX_free(pkey_ctx); |
2649 | s->s3->tmp.pms = pms; | |
2650 | s->s3->tmp.pmslen = pmslen; | |
2651 | ||
2652 | return 1; | |
2653 | err: | |
2654 | EVP_PKEY_CTX_free(pkey_ctx); | |
2655 | OPENSSL_clear_free(pms, pmslen); | |
2656 | EVP_MD_CTX_free(ukm_hash); | |
2657 | return 0; | |
2658 | #else | |
05ec6a25 | 2659 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2660 | *al = SSL_AD_INTERNAL_ERROR; |
2661 | return 0; | |
2662 | #endif | |
2663 | } | |
2664 | ||
f1ec23c0 | 2665 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2666 | { |
8b9546c7 | 2667 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2668 | unsigned char *abytes = NULL; |
2669 | ||
2670 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2671 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2672 | &abytes)) { | |
05ec6a25 | 2673 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2674 | return 0; |
2675 | } | |
f1ec23c0 MC |
2676 | BN_bn2bin(s->srp_ctx.A, abytes); |
2677 | ||
840a2bf8 MC |
2678 | OPENSSL_free(s->session->srp_username); |
2679 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2680 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2681 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2682 | return 0; |
2683 | } | |
2684 | ||
2685 | return 1; | |
2686 | #else | |
05ec6a25 | 2687 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2688 | *al = SSL_AD_INTERNAL_ERROR; |
2689 | return 0; | |
2690 | #endif | |
2691 | } | |
2692 | ||
7cea05dc | 2693 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2694 | { |
13c0ec4a MC |
2695 | unsigned long alg_k; |
2696 | int al = -1; | |
2697 | ||
f1ec23c0 | 2698 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2699 | |
13c0ec4a | 2700 | if ((alg_k & SSL_PSK) |
7cea05dc | 2701 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2702 | goto err; |
2703 | ||
f1ec23c0 | 2704 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2705 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 2706 | goto err; |
a8c1c704 | 2707 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 2708 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 2709 | goto err; |
67ad5aab | 2710 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 2711 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 2712 | goto err; |
e00e0b3d | 2713 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 2714 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 2715 | goto err; |
840a2bf8 | 2716 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 2717 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 2718 | goto err; |
4a424545 | 2719 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
2720 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2721 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2722 | goto err; | |
2723 | } | |
2724 | ||
b9908bf9 | 2725 | return 1; |
0f113f3e | 2726 | err: |
13c0ec4a MC |
2727 | if (al != -1) |
2728 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 2729 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 2730 | s->s3->tmp.pms = NULL; |
7689082b DSH |
2731 | #ifndef OPENSSL_NO_PSK |
2732 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2733 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2734 | #endif |
b9908bf9 MC |
2735 | return 0; |
2736 | } | |
2737 | ||
2738 | int tls_client_key_exchange_post_work(SSL *s) | |
2739 | { | |
2740 | unsigned char *pms = NULL; | |
2741 | size_t pmslen = 0; | |
2742 | ||
6f137370 MC |
2743 | pms = s->s3->tmp.pms; |
2744 | pmslen = s->s3->tmp.pmslen; | |
2745 | ||
b9908bf9 MC |
2746 | #ifndef OPENSSL_NO_SRP |
2747 | /* Check for SRP */ | |
2748 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2749 | if (!srp_generate_client_master_secret(s)) { | |
2750 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2751 | ERR_R_INTERNAL_ERROR); | |
2752 | goto err; | |
2753 | } | |
2754 | return 1; | |
2755 | } | |
2756 | #endif | |
b9908bf9 MC |
2757 | |
2758 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2759 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2760 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2761 | goto err; | |
2762 | } | |
2763 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2764 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2765 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
2766 | /* ssl_generate_master_secret frees the pms even on error */ |
2767 | pms = NULL; | |
2768 | pmslen = 0; | |
b9908bf9 MC |
2769 | goto err; |
2770 | } | |
6f137370 MC |
2771 | pms = NULL; |
2772 | pmslen = 0; | |
473483d4 MC |
2773 | |
2774 | #ifndef OPENSSL_NO_SCTP | |
2775 | if (SSL_IS_DTLS(s)) { | |
2776 | unsigned char sctpauthkey[64]; | |
2777 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2778 | ||
2779 | /* | |
2780 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2781 | * used. | |
2782 | */ | |
141eb8c6 MC |
2783 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2784 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2785 | |
2786 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
2787 | sizeof(sctpauthkey), labelbuffer, |
2788 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
2789 | goto err; |
2790 | ||
2791 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2792 | sizeof(sctpauthkey), sctpauthkey); | |
2793 | } | |
2794 | #endif | |
2795 | ||
b9908bf9 MC |
2796 | return 1; |
2797 | err: | |
2798 | OPENSSL_clear_free(pms, pmslen); | |
2799 | s->s3->tmp.pms = NULL; | |
2800 | return 0; | |
0f113f3e | 2801 | } |
d02b48c6 | 2802 | |
7cea05dc | 2803 | int tls_construct_client_verify(SSL *s, WPACKET *pkt) |
0f113f3e | 2804 | { |
0f113f3e | 2805 | EVP_PKEY *pkey; |
a0f63828 | 2806 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
5a008ff6 | 2807 | EVP_MD_CTX *mctx = NULL; |
0f113f3e | 2808 | unsigned u = 0; |
a0f63828 DSH |
2809 | long hdatalen = 0; |
2810 | void *hdata; | |
6400f338 | 2811 | unsigned char *sig = NULL; |
6400f338 | 2812 | |
bfb0641f | 2813 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2814 | if (mctx == NULL) { |
2815 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2816 | goto err; | |
2817 | } | |
b9908bf9 | 2818 | pkey = s->cert->key->privatekey; |
a0f63828 DSH |
2819 | |
2820 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2821 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2822 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2823 | goto err; | |
2824 | } | |
0f1e51ea | 2825 | |
7cea05dc | 2826 | if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) { |
6400f338 MC |
2827 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2828 | goto err; | |
a0f63828 | 2829 | } |
855a54a9 | 2830 | #ifdef SSL_DEBUG |
a0f63828 | 2831 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2832 | #endif |
6400f338 MC |
2833 | sig = OPENSSL_malloc(EVP_PKEY_size(pkey)); |
2834 | if (sig == NULL) { | |
2835 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2836 | goto err; | |
2837 | } | |
6e59a892 RL |
2838 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2839 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2840 | || (s->version == SSL3_VERSION |
6e59a892 | 2841 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
348240c6 | 2842 | (int)s->session->master_key_length, |
a0f63828 | 2843 | s->session->master_key)) |
6400f338 | 2844 | || !EVP_SignFinal(mctx, sig, &u, pkey)) { |
a0f63828 DSH |
2845 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2846 | goto err; | |
2847 | } | |
2a9b9654 | 2848 | #ifndef OPENSSL_NO_GOST |
3aeb9348 DSH |
2849 | { |
2850 | int pktype = EVP_PKEY_id(pkey); | |
2851 | if (pktype == NID_id_GostR3410_2001 | |
2852 | || pktype == NID_id_GostR3410_2012_256 | |
2853 | || pktype == NID_id_GostR3410_2012_512) | |
6400f338 | 2854 | BUF_reverse(sig, NULL, u); |
b9908bf9 | 2855 | } |
2a9b9654 | 2856 | #endif |
a0f63828 | 2857 | |
7cea05dc | 2858 | if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) { |
6400f338 MC |
2859 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2860 | goto err; | |
2861 | } | |
2862 | ||
a0f63828 DSH |
2863 | /* Digest cached records and discard handshake buffer */ |
2864 | if (!ssl3_digest_cached_records(s, 0)) | |
2865 | goto err; | |
6400f338 | 2866 | |
6400f338 | 2867 | OPENSSL_free(sig); |
bfb0641f | 2868 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2869 | return 1; |
0f113f3e | 2870 | err: |
6400f338 | 2871 | OPENSSL_free(sig); |
bfb0641f | 2872 | EVP_MD_CTX_free(mctx); |
6400f338 | 2873 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 | 2874 | return 0; |
0f113f3e MC |
2875 | } |
2876 | ||
2877 | /* | |
2878 | * Check a certificate can be used for client authentication. Currently check | |
2879 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2880 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2881 | */ |
2882 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2883 | { |
0f113f3e MC |
2884 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2885 | return 0; | |
2886 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2887 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2888 | return 0; |
2889 | /* | |
2890 | * If strict mode check suitability of chain before using it. This also | |
2891 | * adjusts suite B digest if necessary. | |
2892 | */ | |
2893 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2894 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2895 | return 0; | |
0f113f3e MC |
2896 | return 1; |
2897 | } | |
0d609395 | 2898 | |
be3583fa | 2899 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2900 | { |
2901 | X509 *x509 = NULL; | |
2902 | EVP_PKEY *pkey = NULL; | |
2903 | int i; | |
2904 | ||
b9908bf9 | 2905 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2906 | /* Let cert callback update client certificates if required */ |
2907 | if (s->cert->cert_cb) { | |
2908 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2909 | if (i < 0) { | |
2910 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2911 | return WORK_MORE_A; |
0f113f3e MC |
2912 | } |
2913 | if (i == 0) { | |
2914 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2915 | ossl_statem_set_error(s); |
0f113f3e MC |
2916 | return 0; |
2917 | } | |
2918 | s->rwstate = SSL_NOTHING; | |
2919 | } | |
2920 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2921 | return WORK_FINISHED_CONTINUE; |
2922 | ||
2923 | /* Fall through to WORK_MORE_B */ | |
2924 | wst = WORK_MORE_B; | |
0f113f3e MC |
2925 | } |
2926 | ||
2927 | /* We need to get a client cert */ | |
b9908bf9 | 2928 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2929 | /* |
2930 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2931 | * return(-1); We then get retied later | |
2932 | */ | |
0f113f3e MC |
2933 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2934 | if (i < 0) { | |
2935 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2936 | return WORK_MORE_B; |
0f113f3e MC |
2937 | } |
2938 | s->rwstate = SSL_NOTHING; | |
2939 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2940 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2941 | i = 0; | |
2942 | } else if (i == 1) { | |
2943 | i = 0; | |
b9908bf9 | 2944 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2945 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2946 | } | |
2947 | ||
222561fe | 2948 | X509_free(x509); |
25aaa98a | 2949 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2950 | if (i && !ssl3_check_client_certificate(s)) |
2951 | i = 0; | |
2952 | if (i == 0) { | |
2953 | if (s->version == SSL3_VERSION) { | |
2954 | s->s3->tmp.cert_req = 0; | |
2955 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2956 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2957 | } else { |
2958 | s->s3->tmp.cert_req = 2; | |
124037fd | 2959 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2960 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2961 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2962 | return 0; |
2963 | } | |
0f113f3e MC |
2964 | } |
2965 | } | |
2966 | ||
b9908bf9 | 2967 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2968 | } |
2969 | ||
b9908bf9 MC |
2970 | /* Shouldn't ever get here */ |
2971 | return WORK_ERROR; | |
2972 | } | |
2973 | ||
7cea05dc | 2974 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 2975 | { |
7cea05dc | 2976 | if (!ssl3_output_cert_chain(s, pkt, |
b90506e9 MC |
2977 | (s->s3->tmp.cert_req == 2) ? NULL |
2978 | : s->cert->key)) { | |
b9908bf9 MC |
2979 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
2980 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2981 | return 0; |
0f113f3e | 2982 | } |
b9908bf9 MC |
2983 | |
2984 | return 1; | |
0f113f3e MC |
2985 | } |
2986 | ||
2987 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2988 | |
36d16f8e | 2989 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 2990 | { |
60f43e9e RL |
2991 | int i; |
2992 | #ifndef OPENSSL_NO_EC | |
2993 | int idx; | |
2994 | #endif | |
0f113f3e MC |
2995 | long alg_k, alg_a; |
2996 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 2997 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2998 | |
0f113f3e MC |
2999 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3000 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3001 | |
0f113f3e | 3002 | /* we don't have a certificate */ |
55a9a16f | 3003 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3004 | return (1); |
d02b48c6 | 3005 | |
0f113f3e | 3006 | /* This is the passed certificate */ |
d02b48c6 | 3007 | |
10bf4fc2 | 3008 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3009 | idx = s->session->peer_type; |
0f113f3e | 3010 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3011 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3012 | /* check failed */ |
3013 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3014 | goto f_err; | |
3015 | } else { | |
3016 | return 1; | |
3017 | } | |
3018 | } else if (alg_a & SSL_aECDSA) { | |
3019 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3020 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3021 | goto f_err; | |
0f113f3e MC |
3022 | } |
3023 | #endif | |
8382fd3a | 3024 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3025 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3026 | |
3027 | /* Check that we have a certificate if we require one */ | |
3028 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3029 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3030 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3031 | goto f_err; | |
3032 | } | |
bc36ee62 | 3033 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3034 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3035 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3036 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3037 | goto f_err; | |
3038 | } | |
d02b48c6 | 3039 | #endif |
bc36ee62 | 3040 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3041 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3042 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3043 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3044 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3045 | goto f_err; | |
0f113f3e | 3046 | } |
79df9d62 | 3047 | #endif |
bc36ee62 | 3048 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3049 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3050 | al = SSL_AD_INTERNAL_ERROR; |
3051 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3052 | goto f_err; |
0f113f3e | 3053 | } |
d02b48c6 RE |
3054 | #endif |
3055 | ||
0f113f3e MC |
3056 | return (1); |
3057 | f_err: | |
26c79d56 | 3058 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3059 | return (0); |
3060 | } | |
3061 | ||
e481f9b9 | 3062 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3063 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3064 | { |
15e6be6c MC |
3065 | size_t len, padding_len; |
3066 | unsigned char *padding = NULL; | |
15e6be6c | 3067 | |
b9908bf9 MC |
3068 | len = s->next_proto_negotiated_len; |
3069 | padding_len = 32 - ((len + 2) % 32); | |
15e6be6c | 3070 | |
7cea05dc MC |
3071 | if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len) |
3072 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { | |
15e6be6c MC |
3073 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3074 | goto err; | |
3075 | } | |
3076 | ||
3077 | memset(padding, 0, padding_len); | |
3078 | ||
b9908bf9 | 3079 | return 1; |
15e6be6c | 3080 | err: |
15e6be6c MC |
3081 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3082 | return 0; | |
b9908bf9 | 3083 | } |
6434abbf | 3084 | #endif |
368888bc DSH |
3085 | |
3086 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3087 | { |
3088 | int i = 0; | |
368888bc | 3089 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3090 | if (s->ctx->client_cert_engine) { |
3091 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3092 | SSL_get_client_CA_list(s), | |
3093 | px509, ppkey, NULL, NULL, NULL); | |
3094 | if (i != 0) | |
3095 | return i; | |
3096 | } | |
3097 | #endif | |
3098 | if (s->ctx->client_cert_cb) | |
3099 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3100 | return i; | |
3101 | } | |
d45ba43d | 3102 | |
ae2f7b37 | 3103 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3104 | { |
2c7b4dbc MC |
3105 | int i; |
3106 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3107 | int empty_reneg_info_scsv = !s->renegotiate; |
3108 | /* Set disabled masks for this session */ | |
3109 | ssl_set_client_disabled(s); | |
3110 | ||
3111 | if (sk == NULL) | |
3112 | return (0); | |
d45ba43d | 3113 | |
2c7b4dbc MC |
3114 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3115 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3116 | # error Max cipher length too short | |
3117 | # endif | |
3118 | /* | |
3119 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3120 | * chop number of supported ciphers to keep it well below this if we | |
3121 | * use TLS v1.2 | |
3122 | */ | |
3123 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3124 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3125 | else | |
3126 | #endif | |
3127 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3128 | maxlen = 0xfffe; | |
3129 | ||
3130 | if (empty_reneg_info_scsv) | |
3131 | maxlen -= 2; | |
3132 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3133 | maxlen -= 2; | |
3134 | ||
3135 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3136 | const SSL_CIPHER *c; | |
3137 | ||
d45ba43d MC |
3138 | c = sk_SSL_CIPHER_value(sk, i); |
3139 | /* Skip disabled ciphers */ | |
3140 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3141 | continue; | |
2c7b4dbc MC |
3142 | |
3143 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3144 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3145 | return 0; | |
3146 | } | |
3147 | ||
3148 | totlen += len; | |
d45ba43d | 3149 | } |
2c7b4dbc MC |
3150 | |
3151 | if (totlen == 0) { | |
3152 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3153 | return 0; | |
3154 | } | |
3155 | ||
3156 | if (totlen != 0) { | |
d45ba43d MC |
3157 | if (empty_reneg_info_scsv) { |
3158 | static SSL_CIPHER scsv = { | |
3159 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3160 | }; | |
2c7b4dbc MC |
3161 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3162 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3163 | return 0; | |
3164 | } | |
d45ba43d MC |
3165 | } |
3166 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3167 | static SSL_CIPHER scsv = { | |
3168 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3169 | }; | |
2c7b4dbc MC |
3170 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3171 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3172 | return 0; | |
3173 | } | |
d45ba43d MC |
3174 | } |
3175 | } | |
3176 | ||
2c7b4dbc | 3177 | return 1; |
d45ba43d | 3178 | } |