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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
8c74b5e5 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 8 | */ |
846e33c7 | 9 | |
ea262260 BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
12 | * | |
0f113f3e | 13 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
15 | * | |
16 | * The Contribution is licensed pursuant to the OpenSSL open source | |
17 | * license provided above. | |
18 | * | |
ea262260 BM |
19 | * ECC cipher suite support in OpenSSL originally written by |
20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
21 | * | |
22 | */ | |
ddac1974 NL |
23 | /* ==================================================================== |
24 | * Copyright 2005 Nokia. All rights reserved. | |
25 | * | |
26 | * The portions of the attached software ("Contribution") is developed by | |
27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
28 | * license. | |
29 | * | |
30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
32 | * support (see RFC 4279) to OpenSSL. | |
33 | * | |
34 | * No patent licenses or other rights except those expressly stated in | |
35 | * the OpenSSL open source license shall be deemed granted or received | |
36 | * expressly, by implication, estoppel, or otherwise. | |
37 | * | |
38 | * No assurances are provided by Nokia that the Contribution does not | |
39 | * infringe the patent or other intellectual property rights of any third | |
40 | * party or that the license provides you with all the necessary rights | |
41 | * to make use of the Contribution. | |
42 | * | |
43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
47 | * OTHERWISE. | |
48 | */ | |
d02b48c6 RE |
49 | |
50 | #include <stdio.h> | |
8ba708e5 | 51 | #include "../ssl_locl.h" |
61ae935a | 52 | #include "statem_locl.h" |
ec577822 BM |
53 | #include <openssl/buffer.h> |
54 | #include <openssl/rand.h> | |
55 | #include <openssl/objects.h> | |
56 | #include <openssl/evp.h> | |
dbad1690 | 57 | #include <openssl/md5.h> |
3c27208f | 58 | #include <openssl/dh.h> |
d095b68d | 59 | #include <openssl/bn.h> |
3c27208f | 60 | #include <openssl/engine.h> |
f9b3bff6 | 61 | |
e46f2334 MC |
62 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
63 | ||
7ab09630 | 64 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 65 | static int key_exchange_expected(SSL *s); |
0f113f3e | 66 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 67 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 68 | WPACKET *pkt); |
ea262260 | 69 | |
61ae935a MC |
70 | /* |
71 | * Is a CertificateRequest message allowed at the moment or not? | |
72 | * | |
73 | * Return values are: | |
74 | * 1: Yes | |
75 | * 0: No | |
76 | */ | |
7ab09630 | 77 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
78 | { |
79 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 80 | if ((s->version > SSL3_VERSION |
a230b26e EK |
81 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
82 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
83 | return 0; |
84 | ||
85 | return 1; | |
86 | } | |
87 | ||
88 | /* | |
a455d0f6 | 89 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
90 | * |
91 | * Return values are: | |
92 | * 1: Yes | |
93 | * 0: No | |
94 | */ | |
a455d0f6 | 95 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
96 | { |
97 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
98 | ||
99 | /* | |
100 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 101 | * ciphersuite or for SRP |
61ae935a | 102 | */ |
a455d0f6 MC |
103 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
104 | | SSL_kSRP)) { | |
105 | return 1; | |
61ae935a MC |
106 | } |
107 | ||
a455d0f6 | 108 | return 0; |
61ae935a MC |
109 | } |
110 | ||
0f1e51ea MC |
111 | /* |
112 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
113 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
114 | * server. The message type that the server has sent is provided in |mt|. The | |
115 | * current state is in |s->statem.hand_state|. | |
116 | * | |
94ed2c67 MC |
117 | * Return values are 1 for success (transition allowed) and 0 on error |
118 | * (transition not allowed) | |
0f1e51ea MC |
119 | */ |
120 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
121 | { | |
122 | OSSL_STATEM *st = &s->statem; | |
123 | ||
94ed2c67 MC |
124 | /* |
125 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
126 | * we will update this to look more like real TLSv1.3 | |
127 | */ | |
128 | ||
0f1e51ea MC |
129 | /* |
130 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
131 | * yet negotiated TLSv1.3 at that point so that is handled by | |
132 | * ossl_statem_client_read_transition() | |
133 | */ | |
134 | ||
135 | switch (st->hand_state) { | |
136 | default: | |
137 | break; | |
138 | ||
139 | case TLS_ST_CR_SRVR_HELLO: | |
e46f2334 MC |
140 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
141 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
142 | return 1; | |
143 | } | |
144 | break; | |
145 | ||
146 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 147 | if (s->hit) { |
92760c21 MC |
148 | if (mt == SSL3_MT_FINISHED) { |
149 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
150 | return 1; |
151 | } | |
152 | } else { | |
92760c21 MC |
153 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
154 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
155 | return 1; | |
f5ca0b04 MC |
156 | } |
157 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
158 | st->hand_state = TLS_ST_CR_CERT; |
159 | return 1; | |
160 | } | |
161 | } | |
162 | break; | |
163 | ||
92760c21 MC |
164 | case TLS_ST_CR_CERT_REQ: |
165 | if (mt == SSL3_MT_CERTIFICATE) { | |
166 | st->hand_state = TLS_ST_CR_CERT; | |
167 | return 1; | |
168 | } | |
169 | break; | |
170 | ||
0f1e51ea MC |
171 | case TLS_ST_CR_CERT: |
172 | /* | |
173 | * The CertificateStatus message is optional even if | |
174 | * |tlsext_status_expected| is set | |
175 | */ | |
176 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
177 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
178 | return 1; | |
179 | } | |
180 | /* Fall through */ | |
181 | ||
182 | case TLS_ST_CR_CERT_STATUS: | |
0f1e51ea MC |
183 | if (mt == SSL3_MT_FINISHED) { |
184 | st->hand_state = TLS_ST_CR_FINISHED; | |
185 | return 1; | |
186 | } | |
187 | break; | |
92760c21 | 188 | |
0f1e51ea MC |
189 | } |
190 | ||
0f1e51ea | 191 | /* No valid transition found */ |
0f1e51ea MC |
192 | return 0; |
193 | } | |
194 | ||
61ae935a | 195 | /* |
8481f583 MC |
196 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
197 | * handshake state transitions when the client is reading messages from the | |
198 | * server. The message type that the server has sent is provided in |mt|. The | |
199 | * current state is in |s->statem.hand_state|. | |
61ae935a | 200 | * |
94ed2c67 MC |
201 | * Return values are 1 for success (transition allowed) and 0 on error |
202 | * (transition not allowed) | |
61ae935a | 203 | */ |
8481f583 | 204 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 205 | { |
d6f1a6e9 | 206 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 207 | int ske_expected; |
61ae935a | 208 | |
0f1e51ea MC |
209 | /* |
210 | * Note that after a ClientHello we don't know what version we are going | |
211 | * to negotiate yet, so we don't take this branch until later | |
212 | */ | |
f5ca0b04 | 213 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
214 | if (!ossl_statem_client13_read_transition(s, mt)) |
215 | goto err; | |
216 | return 1; | |
217 | } | |
0f1e51ea | 218 | |
a230b26e | 219 | switch (st->hand_state) { |
f3b3d7f0 RS |
220 | default: |
221 | break; | |
222 | ||
61ae935a MC |
223 | case TLS_ST_CW_CLNT_HELLO: |
224 | if (mt == SSL3_MT_SERVER_HELLO) { | |
225 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
226 | return 1; | |
227 | } | |
228 | ||
229 | if (SSL_IS_DTLS(s)) { | |
230 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
231 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
232 | return 1; | |
233 | } | |
234 | } | |
235 | break; | |
236 | ||
237 | case TLS_ST_CR_SRVR_HELLO: | |
238 | if (s->hit) { | |
239 | if (s->tlsext_ticket_expected) { | |
240 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
241 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
242 | return 1; | |
243 | } | |
244 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
245 | st->hand_state = TLS_ST_CR_CHANGE; | |
246 | return 1; | |
247 | } | |
248 | } else { | |
249 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
250 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
251 | return 1; | |
ad3819c2 | 252 | } else if (s->version >= TLS1_VERSION |
a230b26e EK |
253 | && s->tls_session_secret_cb != NULL |
254 | && s->session->tlsext_tick != NULL | |
255 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
ad3819c2 MC |
256 | /* |
257 | * Normally, we can tell if the server is resuming the session | |
258 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
259 | * the next server message after the ServerHello to determine if | |
260 | * the server is resuming. | |
261 | */ | |
262 | s->hit = 1; | |
263 | st->hand_state = TLS_ST_CR_CHANGE; | |
264 | return 1; | |
61ae935a | 265 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 266 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
267 | if (mt == SSL3_MT_CERTIFICATE) { |
268 | st->hand_state = TLS_ST_CR_CERT; | |
269 | return 1; | |
270 | } | |
271 | } else { | |
a455d0f6 | 272 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
273 | /* SKE is optional for some PSK ciphersuites */ |
274 | if (ske_expected | |
a230b26e EK |
275 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
276 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
277 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
278 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
279 | return 1; | |
280 | } | |
281 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
282 | && cert_req_allowed(s)) { |
283 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
284 | return 1; | |
a455d0f6 | 285 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
286 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
287 | return 1; | |
61ae935a MC |
288 | } |
289 | } | |
290 | } | |
291 | break; | |
292 | ||
293 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
294 | /* |
295 | * The CertificateStatus message is optional even if | |
296 | * |tlsext_status_expected| is set | |
297 | */ | |
298 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
299 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
300 | return 1; | |
a455d0f6 MC |
301 | } |
302 | /* Fall through */ | |
303 | ||
304 | case TLS_ST_CR_CERT_STATUS: | |
305 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 306 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
307 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
308 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
309 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
310 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
311 | return 1; | |
61ae935a | 312 | } |
672f3337 | 313 | goto err; |
61ae935a | 314 | } |
a455d0f6 | 315 | /* Fall through */ |
61ae935a | 316 | |
a455d0f6 MC |
317 | case TLS_ST_CR_KEY_EXCH: |
318 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
319 | if (cert_req_allowed(s)) { | |
61ae935a MC |
320 | st->hand_state = TLS_ST_CR_CERT_REQ; |
321 | return 1; | |
61ae935a | 322 | } |
672f3337 | 323 | goto err; |
61ae935a | 324 | } |
a455d0f6 | 325 | /* Fall through */ |
61ae935a MC |
326 | |
327 | case TLS_ST_CR_CERT_REQ: | |
328 | if (mt == SSL3_MT_SERVER_DONE) { | |
329 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
330 | return 1; | |
331 | } | |
332 | break; | |
333 | ||
334 | case TLS_ST_CW_FINISHED: | |
c45d6b2b DB |
335 | if (s->tlsext_ticket_expected) { |
336 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
337 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
338 | return 1; | |
339 | } | |
61ae935a MC |
340 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
341 | st->hand_state = TLS_ST_CR_CHANGE; | |
342 | return 1; | |
343 | } | |
344 | break; | |
345 | ||
346 | case TLS_ST_CR_SESSION_TICKET: | |
347 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
348 | st->hand_state = TLS_ST_CR_CHANGE; | |
349 | return 1; | |
350 | } | |
351 | break; | |
352 | ||
353 | case TLS_ST_CR_CHANGE: | |
354 | if (mt == SSL3_MT_FINISHED) { | |
355 | st->hand_state = TLS_ST_CR_FINISHED; | |
356 | return 1; | |
357 | } | |
358 | break; | |
61ae935a MC |
359 | } |
360 | ||
672f3337 | 361 | err: |
61ae935a | 362 | /* No valid transition found */ |
672f3337 | 363 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 364 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
365 | return 0; |
366 | } | |
367 | ||
368 | /* | |
0f1e51ea MC |
369 | * ossl_statem_client13_write_transition() works out what handshake state to |
370 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
371 | * server. | |
0f1e51ea MC |
372 | */ |
373 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
374 | { | |
375 | OSSL_STATEM *st = &s->statem; | |
376 | ||
94ed2c67 MC |
377 | /* |
378 | * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time | |
379 | * we will update this to look more like real TLSv1.3 | |
380 | */ | |
381 | ||
0f1e51ea MC |
382 | /* |
383 | * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO, | |
384 | * because we haven't negotiated TLSv1.3 yet at that point. They are | |
385 | * handled by ossl_statem_client_write_transition(). | |
386 | */ | |
387 | switch (st->hand_state) { | |
388 | default: | |
389 | /* Shouldn't happen */ | |
390 | return WRITE_TRAN_ERROR; | |
391 | ||
92760c21 | 392 | case TLS_ST_CR_FINISHED: |
94ed2c67 | 393 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 394 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
395 | return WRITE_TRAN_CONTINUE; |
396 | ||
397 | case TLS_ST_CW_CERT: | |
398 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 399 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 400 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
401 | return WRITE_TRAN_CONTINUE; |
402 | ||
403 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
404 | st->hand_state = TLS_ST_CW_FINISHED; |
405 | return WRITE_TRAN_CONTINUE; | |
406 | ||
407 | case TLS_ST_CW_FINISHED: | |
94ed2c67 MC |
408 | st->hand_state = TLS_ST_OK; |
409 | ossl_statem_set_in_init(s, 0); | |
410 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea MC |
411 | } |
412 | } | |
413 | ||
414 | /* | |
415 | * ossl_statem_client_write_transition() works out what handshake state to | |
416 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 417 | */ |
8481f583 | 418 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 419 | { |
d6f1a6e9 | 420 | OSSL_STATEM *st = &s->statem; |
61ae935a | 421 | |
0f1e51ea MC |
422 | /* |
423 | * Note that immediately before/after a ClientHello we don't know what | |
424 | * version we are going to negotiate yet, so we don't take this branch until | |
425 | * later | |
426 | */ | |
f5ca0b04 | 427 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
428 | return ossl_statem_client13_write_transition(s); |
429 | ||
a230b26e | 430 | switch (st->hand_state) { |
f3b3d7f0 RS |
431 | default: |
432 | /* Shouldn't happen */ | |
433 | return WRITE_TRAN_ERROR; | |
434 | ||
a230b26e EK |
435 | case TLS_ST_OK: |
436 | /* Renegotiation - fall through */ | |
437 | case TLS_ST_BEFORE: | |
438 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
439 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 440 | |
a230b26e EK |
441 | case TLS_ST_CW_CLNT_HELLO: |
442 | /* | |
443 | * No transition at the end of writing because we don't know what | |
444 | * we will be sent | |
445 | */ | |
446 | return WRITE_TRAN_FINISHED; | |
61ae935a | 447 | |
a230b26e EK |
448 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
449 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
450 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 451 | |
a230b26e EK |
452 | case TLS_ST_CR_SRVR_DONE: |
453 | if (s->s3->tmp.cert_req) | |
454 | st->hand_state = TLS_ST_CW_CERT; | |
455 | else | |
61ae935a | 456 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 457 | return WRITE_TRAN_CONTINUE; |
61ae935a | 458 | |
a230b26e EK |
459 | case TLS_ST_CW_CERT: |
460 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
461 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 462 | |
a230b26e EK |
463 | case TLS_ST_CW_KEY_EXCH: |
464 | /* | |
465 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
466 | * sent, but no verify packet is sent | |
467 | */ | |
468 | /* | |
469 | * XXX: For now, we do not support client authentication in ECDH | |
470 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
471 | * need to skip the certificate verify message when client's | |
472 | * ECDH public key is sent inside the client certificate. | |
473 | */ | |
474 | if (s->s3->tmp.cert_req == 1) { | |
475 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
476 | } else { | |
61ae935a | 477 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
478 | } |
479 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
480 | st->hand_state = TLS_ST_CW_CHANGE; | |
481 | } | |
482 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 483 | |
a230b26e EK |
484 | case TLS_ST_CW_CERT_VRFY: |
485 | st->hand_state = TLS_ST_CW_CHANGE; | |
486 | return WRITE_TRAN_CONTINUE; | |
487 | ||
488 | case TLS_ST_CW_CHANGE: | |
61ae935a | 489 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 490 | st->hand_state = TLS_ST_CW_FINISHED; |
61ae935a | 491 | #else |
a230b26e EK |
492 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) |
493 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
494 | else | |
495 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 496 | #endif |
a230b26e | 497 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
498 | |
499 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
500 | case TLS_ST_CW_NEXT_PROTO: |
501 | st->hand_state = TLS_ST_CW_FINISHED; | |
502 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
503 | #endif |
504 | ||
a230b26e EK |
505 | case TLS_ST_CW_FINISHED: |
506 | if (s->hit) { | |
507 | st->hand_state = TLS_ST_OK; | |
508 | ossl_statem_set_in_init(s, 0); | |
509 | return WRITE_TRAN_CONTINUE; | |
510 | } else { | |
511 | return WRITE_TRAN_FINISHED; | |
512 | } | |
61ae935a | 513 | |
a230b26e EK |
514 | case TLS_ST_CR_FINISHED: |
515 | if (s->hit) { | |
516 | st->hand_state = TLS_ST_CW_CHANGE; | |
517 | return WRITE_TRAN_CONTINUE; | |
518 | } else { | |
519 | st->hand_state = TLS_ST_OK; | |
520 | ossl_statem_set_in_init(s, 0); | |
521 | return WRITE_TRAN_CONTINUE; | |
522 | } | |
61ae935a MC |
523 | } |
524 | } | |
525 | ||
526 | /* | |
527 | * Perform any pre work that needs to be done prior to sending a message from | |
528 | * the client to the server. | |
529 | */ | |
8481f583 | 530 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 531 | { |
d6f1a6e9 | 532 | OSSL_STATEM *st = &s->statem; |
61ae935a | 533 | |
a230b26e | 534 | switch (st->hand_state) { |
f3b3d7f0 RS |
535 | default: |
536 | /* No pre work to be done */ | |
537 | break; | |
538 | ||
61ae935a MC |
539 | case TLS_ST_CW_CLNT_HELLO: |
540 | s->shutdown = 0; | |
541 | if (SSL_IS_DTLS(s)) { | |
542 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
543 | if (!ssl3_init_finished_mac(s)) { |
544 | ossl_statem_set_error(s); | |
545 | return WORK_ERROR; | |
546 | } | |
61ae935a MC |
547 | } |
548 | break; | |
549 | ||
61ae935a MC |
550 | case TLS_ST_CW_CHANGE: |
551 | if (SSL_IS_DTLS(s)) { | |
552 | if (s->hit) { | |
553 | /* | |
554 | * We're into the last flight so we don't retransmit these | |
555 | * messages unless we need to. | |
556 | */ | |
557 | st->use_timer = 0; | |
558 | } | |
559 | #ifndef OPENSSL_NO_SCTP | |
560 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
561 | return dtls_wait_for_dry(s); | |
562 | #endif | |
563 | } | |
f3b3d7f0 | 564 | break; |
61ae935a MC |
565 | |
566 | case TLS_ST_OK: | |
567 | return tls_finish_handshake(s, wst); | |
61ae935a MC |
568 | } |
569 | ||
570 | return WORK_FINISHED_CONTINUE; | |
571 | } | |
572 | ||
573 | /* | |
574 | * Perform any work that needs to be done after sending a message from the | |
575 | * client to the server. | |
576 | */ | |
8481f583 | 577 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 578 | { |
d6f1a6e9 | 579 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
580 | |
581 | s->init_num = 0; | |
582 | ||
a230b26e | 583 | switch (st->hand_state) { |
f3b3d7f0 RS |
584 | default: |
585 | /* No post work to be done */ | |
586 | break; | |
587 | ||
61ae935a | 588 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 589 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 590 | return WORK_MORE_A; |
46417569 | 591 | |
61ae935a MC |
592 | if (SSL_IS_DTLS(s)) { |
593 | /* Treat the next message as the first packet */ | |
594 | s->first_packet = 1; | |
595 | } | |
596 | break; | |
597 | ||
598 | case TLS_ST_CW_KEY_EXCH: | |
599 | if (tls_client_key_exchange_post_work(s) == 0) | |
600 | return WORK_ERROR; | |
601 | break; | |
602 | ||
603 | case TLS_ST_CW_CHANGE: | |
604 | s->session->cipher = s->s3->tmp.new_cipher; | |
605 | #ifdef OPENSSL_NO_COMP | |
606 | s->session->compress_meth = 0; | |
607 | #else | |
608 | if (s->s3->tmp.new_compression == NULL) | |
609 | s->session->compress_meth = 0; | |
610 | else | |
611 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
612 | #endif | |
613 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
614 | return WORK_ERROR; | |
615 | ||
616 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
617 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
618 | return WORK_ERROR; | |
619 | ||
620 | if (SSL_IS_DTLS(s)) { | |
621 | #ifndef OPENSSL_NO_SCTP | |
622 | if (s->hit) { | |
623 | /* | |
624 | * Change to new shared key of SCTP-Auth, will be ignored if | |
625 | * no SCTP used. | |
626 | */ | |
627 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
628 | 0, NULL); | |
629 | } | |
630 | #endif | |
631 | ||
632 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
633 | } | |
634 | break; | |
635 | ||
636 | case TLS_ST_CW_FINISHED: | |
637 | #ifndef OPENSSL_NO_SCTP | |
638 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
639 | /* | |
640 | * Change to new shared key of SCTP-Auth, will be ignored if | |
641 | * no SCTP used. | |
642 | */ | |
643 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
644 | 0, NULL); | |
645 | } | |
646 | #endif | |
647 | if (statem_flush(s) != 1) | |
648 | return WORK_MORE_B; | |
92760c21 MC |
649 | |
650 | if (SSL_IS_TLS13(s)) { | |
651 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
652 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
653 | return WORK_ERROR; | |
654 | } | |
61ae935a | 655 | break; |
61ae935a MC |
656 | } |
657 | ||
658 | return WORK_FINISHED_CONTINUE; | |
659 | } | |
660 | ||
661 | /* | |
6392fb8e MC |
662 | * Get the message construction function and message type for sending from the |
663 | * client | |
61ae935a MC |
664 | * |
665 | * Valid return values are: | |
666 | * 1: Success | |
667 | * 0: Error | |
668 | */ | |
6392fb8e | 669 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 670 | confunc_f *confunc, int *mt) |
61ae935a | 671 | { |
d6f1a6e9 | 672 | OSSL_STATEM *st = &s->statem; |
61ae935a | 673 | |
4a01c59f MC |
674 | switch (st->hand_state) { |
675 | default: | |
676 | /* Shouldn't happen */ | |
677 | return 0; | |
678 | ||
679 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 680 | if (SSL_IS_DTLS(s)) |
6392fb8e | 681 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 682 | else |
6392fb8e MC |
683 | *confunc = tls_construct_change_cipher_spec; |
684 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
685 | break; |
686 | ||
687 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
688 | *confunc = tls_construct_client_hello; |
689 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
690 | break; |
691 | ||
692 | case TLS_ST_CW_CERT: | |
6392fb8e MC |
693 | *confunc = tls_construct_client_certificate; |
694 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
695 | break; |
696 | ||
697 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
698 | *confunc = tls_construct_client_key_exchange; |
699 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
700 | break; |
701 | ||
702 | case TLS_ST_CW_CERT_VRFY: | |
6392fb8e MC |
703 | *confunc = tls_construct_client_verify; |
704 | *mt = SSL3_MT_CERTIFICATE_VERIFY; | |
4a01c59f | 705 | break; |
61ae935a MC |
706 | |
707 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 708 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
709 | *confunc = tls_construct_next_proto; |
710 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 711 | break; |
61ae935a | 712 | #endif |
4a01c59f | 713 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
714 | *confunc = tls_construct_finished; |
715 | *mt = SSL3_MT_FINISHED; | |
4a01c59f MC |
716 | break; |
717 | } | |
5923ad4b | 718 | |
5923ad4b | 719 | return 1; |
61ae935a MC |
720 | } |
721 | ||
722 | /* | |
723 | * Returns the maximum allowed length for the current message that we are | |
724 | * reading. Excludes the message header. | |
725 | */ | |
eda75751 | 726 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 727 | { |
d6f1a6e9 | 728 | OSSL_STATEM *st = &s->statem; |
61ae935a | 729 | |
a230b26e | 730 | switch (st->hand_state) { |
f3b3d7f0 RS |
731 | default: |
732 | /* Shouldn't happen */ | |
733 | return 0; | |
734 | ||
a230b26e EK |
735 | case TLS_ST_CR_SRVR_HELLO: |
736 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 737 | |
a230b26e EK |
738 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
739 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 740 | |
a230b26e EK |
741 | case TLS_ST_CR_CERT: |
742 | return s->max_cert_list; | |
61ae935a | 743 | |
a230b26e EK |
744 | case TLS_ST_CR_CERT_STATUS: |
745 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 746 | |
a230b26e EK |
747 | case TLS_ST_CR_KEY_EXCH: |
748 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 749 | |
a230b26e EK |
750 | case TLS_ST_CR_CERT_REQ: |
751 | /* | |
752 | * Set to s->max_cert_list for compatibility with previous releases. In | |
753 | * practice these messages can get quite long if servers are configured | |
754 | * to provide a long list of acceptable CAs | |
755 | */ | |
756 | return s->max_cert_list; | |
61ae935a | 757 | |
a230b26e EK |
758 | case TLS_ST_CR_SRVR_DONE: |
759 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 760 | |
a230b26e EK |
761 | case TLS_ST_CR_CHANGE: |
762 | if (s->version == DTLS1_BAD_VER) | |
763 | return 3; | |
764 | return CCS_MAX_LENGTH; | |
61ae935a | 765 | |
a230b26e EK |
766 | case TLS_ST_CR_SESSION_TICKET: |
767 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 768 | |
a230b26e EK |
769 | case TLS_ST_CR_FINISHED: |
770 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
771 | |
772 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
773 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
61ae935a | 774 | } |
61ae935a MC |
775 | } |
776 | ||
777 | /* | |
778 | * Process a message that the client has been received from the server. | |
779 | */ | |
8481f583 | 780 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 781 | { |
d6f1a6e9 | 782 | OSSL_STATEM *st = &s->statem; |
61ae935a | 783 | |
a230b26e | 784 | switch (st->hand_state) { |
f3b3d7f0 RS |
785 | default: |
786 | /* Shouldn't happen */ | |
787 | return MSG_PROCESS_ERROR; | |
788 | ||
a230b26e EK |
789 | case TLS_ST_CR_SRVR_HELLO: |
790 | return tls_process_server_hello(s, pkt); | |
61ae935a | 791 | |
a230b26e EK |
792 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
793 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 794 | |
a230b26e EK |
795 | case TLS_ST_CR_CERT: |
796 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 797 | |
a230b26e EK |
798 | case TLS_ST_CR_CERT_STATUS: |
799 | return tls_process_cert_status(s, pkt); | |
61ae935a | 800 | |
a230b26e EK |
801 | case TLS_ST_CR_KEY_EXCH: |
802 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 803 | |
a230b26e EK |
804 | case TLS_ST_CR_CERT_REQ: |
805 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 806 | |
a230b26e EK |
807 | case TLS_ST_CR_SRVR_DONE: |
808 | return tls_process_server_done(s, pkt); | |
61ae935a | 809 | |
a230b26e EK |
810 | case TLS_ST_CR_CHANGE: |
811 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 812 | |
a230b26e EK |
813 | case TLS_ST_CR_SESSION_TICKET: |
814 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 815 | |
a230b26e EK |
816 | case TLS_ST_CR_FINISHED: |
817 | return tls_process_finished(s, pkt); | |
e46f2334 MC |
818 | |
819 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
820 | return tls_process_encrypted_extensions(s, pkt); | |
61ae935a | 821 | } |
61ae935a MC |
822 | } |
823 | ||
824 | /* | |
825 | * Perform any further processing required following the receipt of a message | |
826 | * from the server | |
827 | */ | |
8481f583 | 828 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 829 | { |
d6f1a6e9 | 830 | OSSL_STATEM *st = &s->statem; |
61ae935a | 831 | |
a230b26e | 832 | switch (st->hand_state) { |
f3b3d7f0 RS |
833 | default: |
834 | /* Shouldn't happen */ | |
835 | return WORK_ERROR; | |
836 | ||
05c4f1d5 MC |
837 | case TLS_ST_CR_CERT_REQ: |
838 | return tls_prepare_client_certificate(s, wst); | |
839 | ||
61ae935a MC |
840 | #ifndef OPENSSL_NO_SCTP |
841 | case TLS_ST_CR_SRVR_DONE: | |
842 | /* We only get here if we are using SCTP and we are renegotiating */ | |
843 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
844 | s->s3->in_read_app_data = 2; | |
845 | s->rwstate = SSL_READING; | |
846 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
847 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 848 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
849 | return WORK_MORE_A; |
850 | } | |
fe3a3291 | 851 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
852 | return WORK_FINISHED_STOP; |
853 | #endif | |
61ae935a | 854 | } |
61ae935a MC |
855 | } |
856 | ||
7cea05dc | 857 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 858 | { |
2c7b4dbc | 859 | unsigned char *p; |
ec60ccc1 MC |
860 | size_t sess_id_len; |
861 | int i, protverr; | |
2c7b4dbc | 862 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 863 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
864 | SSL_COMP *comp; |
865 | #endif | |
b9908bf9 | 866 | SSL_SESSION *sess = s->session; |
0f113f3e | 867 | |
7cea05dc | 868 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
869 | /* Should not happen */ |
870 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 871 | return 0; |
2c7b4dbc | 872 | } |
0f113f3e | 873 | |
b9908bf9 | 874 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
875 | protverr = ssl_set_client_hello_version(s); |
876 | if (protverr != 0) { | |
877 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 878 | return 0; |
4fa52141 | 879 | } |
0f113f3e | 880 | |
a230b26e | 881 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) || |
0f113f3e | 882 | /* |
b9908bf9 MC |
883 | * In the case of EAP-FAST, we can have a pre-shared |
884 | * "ticket" without a session ID. | |
0f113f3e | 885 | */ |
b9908bf9 MC |
886 | (!sess->session_id_length && !sess->tlsext_tick) || |
887 | (sess->not_resumable)) { | |
888 | if (!ssl_get_new_session(s, 0)) | |
7cea05dc | 889 | return 0; |
b9908bf9 MC |
890 | } |
891 | /* else use the pre-loaded session */ | |
0f113f3e | 892 | |
b9908bf9 | 893 | p = s->s3->client_random; |
0f113f3e | 894 | |
b9908bf9 MC |
895 | /* |
896 | * for DTLS if client_random is initialized, reuse it, we are | |
897 | * required to use same upon reply to HelloVerify | |
898 | */ | |
899 | if (SSL_IS_DTLS(s)) { | |
900 | size_t idx; | |
901 | i = 1; | |
902 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
903 | if (p[idx]) { | |
904 | i = 0; | |
905 | break; | |
0f113f3e | 906 | } |
0f113f3e | 907 | } |
b9908bf9 MC |
908 | } else |
909 | i = 1; | |
0f113f3e | 910 | |
a230b26e | 911 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0) |
7cea05dc | 912 | return 0; |
b9908bf9 | 913 | |
b9908bf9 MC |
914 | /*- |
915 | * version indicates the negotiated version: for example from | |
916 | * an SSLv2/v3 compatible client hello). The client_version | |
917 | * field is the maximum version we permit and it is also | |
918 | * used in RSA encrypted premaster secrets. Some servers can | |
919 | * choke if we initially report a higher version then | |
920 | * renegotiate to a lower one in the premaster secret. This | |
921 | * didn't happen with TLS 1.0 as most servers supported it | |
922 | * but it can with TLS 1.1 or later if the server only supports | |
923 | * 1.0. | |
924 | * | |
925 | * Possible scenario with previous logic: | |
926 | * 1. Client hello indicates TLS 1.2 | |
927 | * 2. Server hello says TLS 1.0 | |
928 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 929 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
930 | * 5. Server sends hello request to renegotiate. |
931 | * 6. Client hello indicates TLS v1.0 as we now | |
932 | * know that is maximum server supports. | |
933 | * 7. Server chokes on RSA encrypted premaster secret | |
934 | * containing version 1.0. | |
935 | * | |
936 | * For interoperability it should be OK to always use the | |
937 | * maximum version we support in client hello and then rely | |
938 | * on the checking of version to ensure the servers isn't | |
939 | * being inconsistent: for example initially negotiating with | |
940 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
941 | * client_version in client hello and not resetting it to | |
942 | * the negotiated version. | |
cd998837 MC |
943 | * |
944 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 945 | * supported_versions extension for the real supported versions. |
b9908bf9 | 946 | */ |
7acb8b64 | 947 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 948 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 949 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 950 | return 0; |
2c7b4dbc | 951 | } |
b9908bf9 MC |
952 | |
953 | /* Session ID */ | |
954 | if (s->new_session) | |
ec60ccc1 | 955 | sess_id_len = 0; |
b9908bf9 | 956 | else |
ec60ccc1 MC |
957 | sess_id_len = s->session->session_id_length; |
958 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 959 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
960 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
961 | sess_id_len)) | |
7cea05dc | 962 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 963 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 964 | return 0; |
b9908bf9 | 965 | } |
0f113f3e | 966 | |
b9908bf9 MC |
967 | /* cookie stuff for DTLS */ |
968 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 969 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 970 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 971 | s->d1->cookie_len)) { |
b9908bf9 | 972 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 973 | return 0; |
0f113f3e | 974 | } |
b9908bf9 MC |
975 | } |
976 | ||
977 | /* Ciphers supported */ | |
7cea05dc | 978 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 979 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 980 | return 0; |
2c7b4dbc MC |
981 | } |
982 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
983 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
984 | return 0; | |
985 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 986 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 987 | return 0; |
b9908bf9 | 988 | } |
0f113f3e | 989 | |
b9908bf9 | 990 | /* COMPRESSION */ |
7cea05dc | 991 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 992 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 993 | return 0; |
2c7b4dbc MC |
994 | } |
995 | #ifndef OPENSSL_NO_COMP | |
996 | if (ssl_allow_compression(s) && s->ctx->comp_methods) { | |
997 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); | |
998 | for (i = 0; i < compnum; i++) { | |
999 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1000 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1001 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1002 | return 0; |
2c7b4dbc MC |
1003 | } |
1004 | } | |
b9908bf9 | 1005 | } |
09b6c2ef | 1006 | #endif |
2c7b4dbc | 1007 | /* Add the NULL method */ |
7cea05dc | 1008 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1009 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1010 | return 0; |
2c7b4dbc | 1011 | } |
761772d7 | 1012 | |
b9908bf9 MC |
1013 | /* TLS extensions */ |
1014 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1015 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
7cea05dc | 1016 | return 0; |
b9908bf9 | 1017 | } |
7cea05dc | 1018 | if (!WPACKET_start_sub_packet_u16(pkt) |
2c7b4dbc MC |
1019 | /* |
1020 | * If extensions are of zero length then we don't even add the | |
1021 | * extensions length bytes | |
1022 | */ | |
7cea05dc MC |
1023 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH) |
1024 | || !ssl_add_clienthello_tlsext(s, pkt, &al) | |
1025 | || !WPACKET_close(pkt)) { | |
b9908bf9 MC |
1026 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
1027 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1028 | return 0; |
b9908bf9 | 1029 | } |
0f113f3e | 1030 | |
b9908bf9 | 1031 | return 1; |
0f113f3e | 1032 | } |
d02b48c6 | 1033 | |
be3583fa | 1034 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1035 | { |
1036 | int al; | |
cb150cbc | 1037 | size_t cookie_len; |
8ba708e5 MC |
1038 | PACKET cookiepkt; |
1039 | ||
1040 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1041 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1042 | al = SSL_AD_DECODE_ERROR; |
1043 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1044 | goto f_err; | |
1045 | } | |
1046 | ||
1047 | cookie_len = PACKET_remaining(&cookiepkt); | |
1048 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1049 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1050 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1051 | goto f_err; | |
1052 | } | |
1053 | ||
1054 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1055 | al = SSL_AD_DECODE_ERROR; | |
1056 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1057 | goto f_err; | |
1058 | } | |
1059 | s->d1->cookie_len = cookie_len; | |
1060 | ||
1061 | return MSG_PROCESS_FINISHED_READING; | |
1062 | f_err: | |
1063 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1064 | ossl_statem_set_error(s); |
8ba708e5 MC |
1065 | return MSG_PROCESS_ERROR; |
1066 | } | |
1067 | ||
be3583fa | 1068 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1069 | { |
1070 | STACK_OF(SSL_CIPHER) *sk; | |
1071 | const SSL_CIPHER *c; | |
73999b62 | 1072 | PACKET session_id; |
b9908bf9 | 1073 | size_t session_id_len; |
b6981744 | 1074 | const unsigned char *cipherchars; |
b9908bf9 MC |
1075 | int i, al = SSL_AD_INTERNAL_ERROR; |
1076 | unsigned int compression; | |
4fa52141 VD |
1077 | unsigned int sversion; |
1078 | int protverr; | |
b9908bf9 MC |
1079 | #ifndef OPENSSL_NO_COMP |
1080 | SSL_COMP *comp; | |
1081 | #endif | |
1082 | ||
4fa52141 VD |
1083 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1084 | al = SSL_AD_DECODE_ERROR; | |
1085 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1086 | goto f_err; | |
1087 | } | |
50932c4a | 1088 | |
4fa52141 VD |
1089 | protverr = ssl_choose_client_version(s, sversion); |
1090 | if (protverr != 0) { | |
1091 | al = SSL_AD_PROTOCOL_VERSION; | |
1092 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1093 | goto f_err; | |
0f113f3e | 1094 | } |
0f113f3e MC |
1095 | |
1096 | /* load the server hello data */ | |
1097 | /* load the server random */ | |
73999b62 | 1098 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1099 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1100 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1101 | goto f_err; |
1102 | } | |
0f113f3e MC |
1103 | |
1104 | s->hit = 0; | |
1105 | ||
fc5ce51d | 1106 | /* Get the session-id. */ |
71728dd8 MC |
1107 | if (!SSL_IS_TLS13(s)) { |
1108 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1109 | al = SSL_AD_DECODE_ERROR; | |
1110 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1111 | goto f_err; | |
1112 | } | |
1113 | session_id_len = PACKET_remaining(&session_id); | |
1114 | if (session_id_len > sizeof s->session->session_id | |
1115 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1116 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1117 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1118 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1119 | goto f_err; | |
1120 | } | |
1121 | } else { | |
1122 | session_id_len = 0; | |
0f113f3e | 1123 | } |
e481f9b9 | 1124 | |
73999b62 | 1125 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1126 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1127 | al = SSL_AD_DECODE_ERROR; |
1128 | goto f_err; | |
1129 | } | |
1130 | ||
0f113f3e | 1131 | /* |
6e3d0153 EK |
1132 | * Check if we can resume the session based on external pre-shared secret. |
1133 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1134 | * Resumption based on server-side state works with session IDs. | |
1135 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1136 | * works by overriding the SessionTicket extension at the application | |
1137 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1138 | * servers would honour the session ID.) Therefore, the session ID alone | |
1139 | * is not a reliable indicator of session resumption, so we first check if | |
1140 | * we can resume, and later peek at the next handshake message to see if the | |
1141 | * server wants to resume. | |
0f113f3e | 1142 | */ |
71728dd8 MC |
1143 | if (s->version >= TLS1_VERSION && !SSL_IS_TLS13(s) |
1144 | && s->tls_session_secret_cb && s->session->tlsext_tick) { | |
4a640fb6 | 1145 | const SSL_CIPHER *pref_cipher = NULL; |
8c1a5343 MC |
1146 | /* |
1147 | * s->session->master_key_length is a size_t, but this is an int for | |
1148 | * backwards compat reasons | |
1149 | */ | |
1150 | int master_key_length; | |
1151 | master_key_length = sizeof(s->session->master_key); | |
0f113f3e | 1152 | if (s->tls_session_secret_cb(s, s->session->master_key, |
8c1a5343 | 1153 | &master_key_length, |
0f113f3e | 1154 | NULL, &pref_cipher, |
8c1a5343 MC |
1155 | s->tls_session_secret_cb_arg) |
1156 | && master_key_length > 0) { | |
1157 | s->session->master_key_length = master_key_length; | |
0f113f3e | 1158 | s->session->cipher = pref_cipher ? |
50932c4a | 1159 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1160 | } else { |
b9908bf9 | 1161 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1162 | al = SSL_AD_INTERNAL_ERROR; |
1163 | goto f_err; | |
0f113f3e | 1164 | } |
50932c4a MC |
1165 | } |
1166 | ||
fc5ce51d EK |
1167 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1168 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1169 | session_id_len) == 0) { | |
0f113f3e MC |
1170 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1171 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1172 | /* actually a client application bug */ | |
1173 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1174 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1175 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1176 | goto f_err; | |
1177 | } | |
1178 | s->hit = 1; | |
6e3d0153 | 1179 | } else { |
0f113f3e | 1180 | /* |
6e3d0153 EK |
1181 | * If we were trying for session-id reuse but the server |
1182 | * didn't echo the ID, make a new SSL_SESSION. | |
1183 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1184 | * so the PAC-based session secret is always preserved. It'll be | |
1185 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1186 | */ |
1187 | if (s->session->session_id_length > 0) { | |
4f6eaa59 | 1188 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1189 | if (!ssl_get_new_session(s, 0)) { |
1190 | goto f_err; | |
1191 | } | |
1192 | } | |
50932c4a | 1193 | |
ccae4a15 | 1194 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1195 | s->session->session_id_length = session_id_len; |
1196 | /* session_id_len could be 0 */ | |
1197 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1198 | session_id_len); | |
0f113f3e | 1199 | } |
fc5ce51d | 1200 | |
ccae4a15 FI |
1201 | /* Session version and negotiated protocol version should match */ |
1202 | if (s->version != s->session->ssl_version) { | |
1203 | al = SSL_AD_PROTOCOL_VERSION; | |
1204 | ||
1205 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1206 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1207 | goto f_err; | |
1208 | } | |
1209 | ||
50932c4a | 1210 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1211 | if (c == NULL) { |
1212 | /* unknown cipher */ | |
1213 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1214 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1215 | goto f_err; |
1216 | } | |
0f113f3e | 1217 | /* |
3eb2aff4 KR |
1218 | * Now that we know the version, update the check to see if it's an allowed |
1219 | * version. | |
1220 | */ | |
1221 | s->s3->tmp.min_ver = s->version; | |
1222 | s->s3->tmp.max_ver = s->version; | |
1223 | /* | |
1224 | * If it is a disabled cipher we either didn't send it in client hello, | |
1225 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1226 | */ |
1227 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1228 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1229 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1230 | goto f_err; |
1231 | } | |
0f113f3e MC |
1232 | |
1233 | sk = ssl_get_ciphers_by_id(s); | |
1234 | i = sk_SSL_CIPHER_find(sk, c); | |
1235 | if (i < 0) { | |
1236 | /* we did not say we would use this cipher */ | |
1237 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1238 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1239 | goto f_err; |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * Depending on the session caching (internal/external), the cipher | |
1244 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1245 | * set and use it for comparison. | |
1246 | */ | |
1247 | if (s->session->cipher) | |
1248 | s->session->cipher_id = s->session->cipher->id; | |
1249 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1250 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1251 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1252 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1253 | goto f_err; | |
0f113f3e MC |
1254 | } |
1255 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1256 | /* lets get the compression algorithm */ |
1257 | /* COMPRESSION */ | |
71728dd8 MC |
1258 | if (!SSL_IS_TLS13(s)) { |
1259 | if (!PACKET_get_1(pkt, &compression)) { | |
1260 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1261 | al = SSL_AD_DECODE_ERROR; | |
1262 | goto f_err; | |
1263 | } | |
1264 | } else { | |
1265 | compression = 0; | |
50932c4a | 1266 | } |
71728dd8 | 1267 | |
09b6c2ef | 1268 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1269 | if (compression != 0) { |
0f113f3e | 1270 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1271 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1272 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1273 | goto f_err; | |
1274 | } | |
1275 | /* | |
1276 | * If compression is disabled we'd better not try to resume a session | |
1277 | * using compression. | |
1278 | */ | |
1279 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1281 | goto f_err; |
1282 | } | |
09b6c2ef | 1283 | #else |
fc5ce51d | 1284 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1285 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1286 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1287 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1288 | goto f_err; | |
1289 | } | |
fc5ce51d | 1290 | if (compression == 0) |
0f113f3e MC |
1291 | comp = NULL; |
1292 | else if (!ssl_allow_compression(s)) { | |
1293 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1294 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1295 | goto f_err; |
fc5ce51d EK |
1296 | } else { |
1297 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1298 | } | |
0f113f3e | 1299 | |
fc5ce51d | 1300 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1301 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1302 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1303 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1304 | goto f_err; | |
1305 | } else { | |
1306 | s->s3->tmp.new_compression = comp; | |
1307 | } | |
09b6c2ef | 1308 | #endif |
761772d7 | 1309 | |
0f113f3e | 1310 | /* TLS extensions */ |
73999b62 | 1311 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1312 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1313 | goto err; |
1314 | } | |
0f113f3e | 1315 | |
73999b62 | 1316 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1317 | /* wrong packet length */ |
1318 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1319 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1320 | goto f_err; |
1321 | } | |
8723588e MC |
1322 | #ifndef OPENSSL_NO_SCTP |
1323 | if (SSL_IS_DTLS(s) && s->hit) { | |
1324 | unsigned char sctpauthkey[64]; | |
1325 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1326 | ||
1327 | /* | |
1328 | * Add new shared key for SCTP-Auth, will be ignored if | |
1329 | * no SCTP used. | |
1330 | */ | |
141eb8c6 MC |
1331 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1332 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1333 | |
1334 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1335 | sizeof(sctpauthkey), |
1336 | labelbuffer, | |
1337 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
8723588e MC |
1338 | goto err; |
1339 | ||
1340 | BIO_ctrl(SSL_get_wbio(s), | |
1341 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1342 | sizeof(sctpauthkey), sctpauthkey); | |
1343 | } | |
1344 | #endif | |
1345 | ||
92760c21 MC |
1346 | /* |
1347 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1348 | * we're done with this message | |
1349 | */ | |
1350 | if (SSL_IS_TLS13(s) | |
1351 | && (!s->method->ssl3_enc->setup_key_block(s) | |
1352 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1353 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE) | |
1354 | || !s->method->ssl3_enc->change_cipher_state(s, | |
1355 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1356 | al = SSL_AD_INTERNAL_ERROR; | |
1357 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1358 | goto f_err; | |
1359 | } | |
1360 | ||
b9908bf9 | 1361 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1362 | f_err: |
1363 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1364 | err: | |
fe3a3291 | 1365 | ossl_statem_set_error(s); |
b9908bf9 | 1366 | return MSG_PROCESS_ERROR; |
0f113f3e | 1367 | } |
d02b48c6 | 1368 | |
be3583fa | 1369 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1370 | { |
1371 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1372 | unsigned long cert_list_len, cert_len; | |
1373 | X509 *x = NULL; | |
b6981744 | 1374 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1375 | STACK_OF(X509) *sk = NULL; |
1376 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1377 | |
1378 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1379 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1380 | goto err; |
0f113f3e MC |
1381 | } |
1382 | ||
73999b62 | 1383 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
a230b26e | 1384 | || PACKET_remaining(pkt) != cert_list_len) { |
0f113f3e | 1385 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1386 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1387 | goto f_err; |
1388 | } | |
73999b62 MC |
1389 | while (PACKET_remaining(pkt)) { |
1390 | if (!PACKET_get_net_3(pkt, &cert_len) | |
a230b26e | 1391 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1392 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1393 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1394 | SSL_R_CERT_LENGTH_MISMATCH); |
1395 | goto f_err; | |
1396 | } | |
1397 | ||
df758a85 MC |
1398 | certstart = certbytes; |
1399 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1400 | if (x == NULL) { |
1401 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1402 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1403 | goto f_err; |
1404 | } | |
df758a85 | 1405 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1406 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1407 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1408 | SSL_R_CERT_LENGTH_MISMATCH); |
1409 | goto f_err; | |
1410 | } | |
1411 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1412 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1413 | goto err; |
0f113f3e MC |
1414 | } |
1415 | x = NULL; | |
0f113f3e MC |
1416 | } |
1417 | ||
1418 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1419 | /* |
1420 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1421 | * for client side verification of the server certificate to take place. | |
1422 | * However, historically the code has only checked that *any* flag is set | |
1423 | * to cause server verification to take place. Use of the other flags makes | |
1424 | * no sense in client mode. An attempt to clean up the semantics was | |
1425 | * reverted because at least one application *only* set | |
1426 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1427 | * server verification to take place, after the clean up it silently did | |
1428 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1429 | * sent to them because they are void functions. Therefore, we now use the | |
1430 | * (less clean) historic behaviour of performing validation if any flag is | |
1431 | * set. The *documented* interface remains the same. | |
1432 | */ | |
1433 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1434 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1435 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1436 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1437 | goto f_err; | |
1438 | } | |
1439 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1440 | if (i > 1) { | |
b9908bf9 | 1441 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1442 | al = SSL_AD_HANDSHAKE_FAILURE; |
1443 | goto f_err; | |
1444 | } | |
1445 | ||
c34b0f99 | 1446 | s->session->peer_chain = sk; |
0f113f3e MC |
1447 | /* |
1448 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1449 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1450 | */ |
1451 | x = sk_X509_value(sk, 0); | |
1452 | sk = NULL; | |
1453 | /* | |
1454 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1455 | */ | |
1456 | ||
8382fd3a | 1457 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1458 | |
55a9a16f | 1459 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1460 | x = NULL; |
1461 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1462 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1463 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1464 | goto f_err; | |
1465 | } | |
1466 | ||
1467 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1468 | if (i < 0) { |
0f113f3e MC |
1469 | x = NULL; |
1470 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1471 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1472 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1473 | goto f_err; | |
1474 | } | |
1475 | ||
55a9a16f | 1476 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 | 1477 | if (exp_idx >= 0 && i != exp_idx |
a230b26e EK |
1478 | && (exp_idx != SSL_PKEY_GOST_EC || |
1479 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1480 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1481 | x = NULL; |
1482 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1483 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1484 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1485 | goto f_err; | |
0f113f3e | 1486 | } |
a273c6ee | 1487 | s->session->peer_type = i; |
55a9a16f MC |
1488 | |
1489 | X509_free(s->session->peer); | |
05f0fb9f | 1490 | X509_up_ref(x); |
55a9a16f | 1491 | s->session->peer = x; |
0f113f3e MC |
1492 | s->session->verify_result = s->verify_result; |
1493 | ||
1494 | x = NULL; | |
b9908bf9 | 1495 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1496 | goto done; |
1497 | ||
0f113f3e | 1498 | f_err: |
66696478 | 1499 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1500 | err: |
fe3a3291 | 1501 | ossl_statem_set_error(s); |
66696478 | 1502 | done: |
0f113f3e MC |
1503 | X509_free(x); |
1504 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1505 | return ret; |
0f113f3e | 1506 | } |
d02b48c6 | 1507 | |
7dc1c647 | 1508 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1509 | { |
1510 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1511 | PACKET psk_identity_hint; |
02a74590 | 1512 | |
7dc1c647 MC |
1513 | /* PSK ciphersuites are preceded by an identity hint */ |
1514 | ||
1515 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1516 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1517 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1518 | return 0; |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * Store PSK identity hint for later use, hint is used in | |
1523 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1524 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1525 | * identity. | |
1526 | */ | |
1527 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1528 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1529 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1530 | return 0; |
1531 | } | |
02a74590 | 1532 | |
7dc1c647 MC |
1533 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1534 | OPENSSL_free(s->session->psk_identity_hint); | |
1535 | s->session->psk_identity_hint = NULL; | |
1536 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1537 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1538 | *al = SSL_AD_INTERNAL_ERROR; |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | return 1; | |
1543 | #else | |
4fa88861 | 1544 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1545 | *al = SSL_AD_INTERNAL_ERROR; |
1546 | return 0; | |
02a74590 MC |
1547 | #endif |
1548 | } | |
1549 | ||
25c6c10c MC |
1550 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1551 | { | |
1552 | #ifndef OPENSSL_NO_SRP | |
1553 | PACKET prime, generator, salt, server_pub; | |
1554 | ||
1555 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1556 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1557 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1558 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1559 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1560 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1561 | return 0; |
1562 | } | |
1563 | ||
348240c6 | 1564 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1565 | if ((s->srp_ctx.N = |
1566 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1567 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1568 | || (s->srp_ctx.g = |
1569 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1570 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1571 | || (s->srp_ctx.s = |
1572 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1573 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1574 | || (s->srp_ctx.B = |
1575 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1576 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1577 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1578 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1579 | return 0; |
1580 | } | |
1581 | ||
1582 | if (!srp_verify_server_param(s, al)) { | |
1583 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1584 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1585 | return 0; |
1586 | } | |
1587 | ||
1588 | /* We must check if there is a certificate */ | |
a230b26e | 1589 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1590 | *pkey = X509_get0_pubkey(s->session->peer); |
1591 | ||
1592 | return 1; | |
1593 | #else | |
4fa88861 | 1594 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1595 | *al = SSL_AD_INTERNAL_ERROR; |
1596 | return 0; | |
1597 | #endif | |
1598 | } | |
1599 | ||
e01a610d MC |
1600 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1601 | { | |
1602 | #ifndef OPENSSL_NO_DH | |
1603 | PACKET prime, generator, pub_key; | |
1604 | EVP_PKEY *peer_tmp = NULL; | |
1605 | ||
1606 | DH *dh = NULL; | |
1607 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1608 | ||
1609 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1610 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1611 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1612 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1613 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1614 | return 0; |
1615 | } | |
1616 | ||
1617 | peer_tmp = EVP_PKEY_new(); | |
1618 | dh = DH_new(); | |
1619 | ||
1620 | if (peer_tmp == NULL || dh == NULL) { | |
1621 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1622 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1623 | goto err; |
1624 | } | |
1625 | ||
348240c6 MC |
1626 | /* TODO(size_t): Convert these calls */ |
1627 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1628 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1629 | NULL); | |
1630 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1631 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1632 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1633 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1634 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1635 | goto err; |
1636 | } | |
1637 | ||
1638 | if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) { | |
1639 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1640 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1641 | goto err; |
1642 | } | |
1643 | ||
1644 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1645 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1646 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1647 | goto err; |
1648 | } | |
1649 | p = g = NULL; | |
1650 | ||
1651 | if (!DH_set0_key(dh, bnpub_key, NULL)) { | |
1652 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1653 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1654 | goto err; |
1655 | } | |
1656 | bnpub_key = NULL; | |
1657 | ||
1658 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1659 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1660 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1661 | goto err; |
1662 | } | |
1663 | ||
1664 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1665 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1666 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
1667 | goto err; |
1668 | } | |
1669 | ||
1670 | s->s3->peer_tmp = peer_tmp; | |
1671 | ||
1672 | /* | |
1673 | * FIXME: This makes assumptions about which ciphersuites come with | |
1674 | * public keys. We should have a less ad-hoc way of doing this | |
1675 | */ | |
a230b26e | 1676 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
1677 | *pkey = X509_get0_pubkey(s->session->peer); |
1678 | /* else anonymous DH, so no certificate or pkey. */ | |
1679 | ||
1680 | return 1; | |
1681 | ||
1682 | err: | |
1683 | BN_free(p); | |
1684 | BN_free(g); | |
1685 | BN_free(bnpub_key); | |
1686 | DH_free(dh); | |
1687 | EVP_PKEY_free(peer_tmp); | |
1688 | ||
1689 | return 0; | |
1690 | #else | |
4fa88861 | 1691 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
1692 | *al = SSL_AD_INTERNAL_ERROR; |
1693 | return 0; | |
1694 | #endif | |
1695 | } | |
1696 | ||
ff74aeb1 MC |
1697 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1698 | { | |
1699 | #ifndef OPENSSL_NO_EC | |
1700 | PACKET encoded_pt; | |
1701 | const unsigned char *ecparams; | |
1702 | int curve_nid; | |
ec24630a | 1703 | unsigned int curve_flags; |
ff74aeb1 MC |
1704 | EVP_PKEY_CTX *pctx = NULL; |
1705 | ||
1706 | /* | |
1707 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1708 | * public key. For now we only support named (not generic) curves and | |
1709 | * ECParameters in this case is just three bytes. | |
1710 | */ | |
1711 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
1712 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1713 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
1714 | return 0; |
1715 | } | |
1716 | /* | |
1717 | * Check curve is one of our preferences, if not server has sent an | |
1718 | * invalid curve. ECParameters is 3 bytes. | |
1719 | */ | |
1720 | if (!tls1_check_curve(s, ecparams, 3)) { | |
1721 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1722 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
1723 | return 0; |
1724 | } | |
1725 | ||
ec24630a DSH |
1726 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
1727 | ||
a230b26e | 1728 | if (curve_nid == 0) { |
ff74aeb1 | 1729 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1730 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
1731 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1732 | return 0; | |
1733 | } | |
1734 | ||
ec24630a DSH |
1735 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
1736 | EVP_PKEY *key = EVP_PKEY_new(); | |
1737 | ||
1738 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
1739 | *al = SSL_AD_INTERNAL_ERROR; | |
1740 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1741 | EVP_PKEY_free(key); | |
1742 | return 0; | |
1743 | } | |
1744 | s->s3->peer_tmp = key; | |
1745 | } else { | |
1746 | /* Set up EVP_PKEY with named curve as parameters */ | |
1747 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1748 | if (pctx == NULL | |
1749 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1750 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1751 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1752 | *al = SSL_AD_INTERNAL_ERROR; | |
1753 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
1754 | EVP_PKEY_CTX_free(pctx); | |
1755 | return 0; | |
1756 | } | |
ff74aeb1 | 1757 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 1758 | pctx = NULL; |
ff74aeb1 | 1759 | } |
ff74aeb1 MC |
1760 | |
1761 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
1762 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1763 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
1764 | return 0; |
1765 | } | |
1766 | ||
ec24630a DSH |
1767 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
1768 | PACKET_data(&encoded_pt), | |
1769 | PACKET_remaining(&encoded_pt))) { | |
ff74aeb1 | 1770 | *al = SSL_AD_DECODE_ERROR; |
4fa88861 | 1771 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
1772 | return 0; |
1773 | } | |
1774 | ||
1775 | /* | |
1776 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1777 | * ECParameters in the server key exchange message. We do support RSA | |
1778 | * and ECDSA. | |
1779 | */ | |
1780 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
1781 | *pkey = X509_get0_pubkey(s->session->peer); | |
1782 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
1783 | *pkey = X509_get0_pubkey(s->session->peer); | |
1784 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1785 | ||
1786 | return 1; | |
1787 | #else | |
4fa88861 | 1788 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
1789 | *al = SSL_AD_INTERNAL_ERROR; |
1790 | return 0; | |
1791 | #endif | |
1792 | } | |
1793 | ||
be3583fa | 1794 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1795 | { |
7dc1c647 | 1796 | int al = -1; |
e1e588ac | 1797 | long alg_k; |
b9908bf9 | 1798 | EVP_PKEY *pkey = NULL; |
73999b62 | 1799 | PACKET save_param_start, signature; |
b9908bf9 | 1800 | |
b9908bf9 MC |
1801 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1802 | ||
73999b62 | 1803 | save_param_start = *pkt; |
8d92c1f8 | 1804 | |
3260adf1 | 1805 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1806 | EVP_PKEY_free(s->s3->peer_tmp); |
1807 | s->s3->peer_tmp = NULL; | |
3260adf1 | 1808 | #endif |
d02b48c6 | 1809 | |
7689082b | 1810 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
1811 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
1812 | goto err; | |
7689082b DSH |
1813 | } |
1814 | ||
1815 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1816 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
1817 | } else if (alg_k & SSL_kSRP) { |
1818 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 1819 | goto err; |
e01a610d MC |
1820 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
1821 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
1822 | goto err; | |
ff74aeb1 MC |
1823 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
1824 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
1825 | goto err; | |
0f113f3e MC |
1826 | } else if (alg_k) { |
1827 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1828 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 1829 | goto err; |
0f113f3e | 1830 | } |
0f113f3e | 1831 | |
0f113f3e MC |
1832 | /* if it was signed, check the signature */ |
1833 | if (pkey != NULL) { | |
32942870 | 1834 | PACKET params; |
be8dba2c MC |
1835 | int maxsig; |
1836 | const EVP_MD *md = NULL; | |
e1e588ac MC |
1837 | EVP_MD_CTX *md_ctx; |
1838 | ||
32942870 EK |
1839 | /* |
1840 | * |pkt| now points to the beginning of the signature, so the difference | |
1841 | * equals the length of the parameters. | |
1842 | */ | |
1843 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1844 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1845 | PACKET_remaining(pkt))) { |
32942870 | 1846 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1847 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1848 | goto err; |
32942870 EK |
1849 | } |
1850 | ||
0f113f3e | 1851 | if (SSL_USE_SIGALGS(s)) { |
b6981744 | 1852 | const unsigned char *sigalgs; |
0f113f3e | 1853 | int rv; |
73999b62 | 1854 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
e1e588ac | 1855 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1856 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 1857 | goto err; |
0f113f3e | 1858 | } |
32942870 | 1859 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
e1e588ac MC |
1860 | if (rv == -1) { |
1861 | al = SSL_AD_INTERNAL_ERROR; | |
1862 | goto err; | |
1863 | } else if (rv == 0) { | |
1864 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 1865 | goto err; |
0f113f3e | 1866 | } |
a2f9200f | 1867 | #ifdef SSL_DEBUG |
0f113f3e MC |
1868 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1869 | #endif | |
3aeb9348 | 1870 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1871 | md = EVP_md5_sha1(); |
32942870 | 1872 | } else { |
0f113f3e | 1873 | md = EVP_sha1(); |
32942870 | 1874 | } |
0f113f3e | 1875 | |
73999b62 MC |
1876 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1877 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 1878 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1879 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 1880 | goto err; |
0f113f3e | 1881 | } |
be8dba2c MC |
1882 | maxsig = EVP_PKEY_size(pkey); |
1883 | if (maxsig < 0) { | |
e1e588ac | 1884 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1885 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 1886 | goto err; |
8098fc56 | 1887 | } |
0f113f3e MC |
1888 | |
1889 | /* | |
8098fc56 | 1890 | * Check signature length |
0f113f3e | 1891 | */ |
be8dba2c | 1892 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 1893 | /* wrong packet length */ |
e1e588ac | 1894 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
1895 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
1896 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
1897 | goto err; |
1898 | } | |
1899 | ||
1900 | md_ctx = EVP_MD_CTX_new(); | |
1901 | if (md_ctx == NULL) { | |
1902 | al = SSL_AD_INTERNAL_ERROR; | |
1903 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1904 | goto err; | |
0f113f3e | 1905 | } |
e1e588ac | 1906 | |
6e59a892 | 1907 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
a230b26e EK |
1908 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), |
1909 | SSL3_RANDOM_SIZE) <= 0 | |
1910 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), | |
1911 | SSL3_RANDOM_SIZE) <= 0 | |
1912 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), | |
1913 | PACKET_remaining(¶ms)) <= 0) { | |
e1e588ac | 1914 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1915 | al = SSL_AD_INTERNAL_ERROR; |
1916 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
e1e588ac | 1917 | goto err; |
192e4bbb | 1918 | } |
348240c6 | 1919 | /* TODO(size_t): Convert this call */ |
6e59a892 | 1920 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
348240c6 MC |
1921 | (unsigned int)PACKET_remaining(&signature), |
1922 | pkey) <= 0) { | |
192e4bbb | 1923 | /* bad signature */ |
e1e588ac | 1924 | EVP_MD_CTX_free(md_ctx); |
192e4bbb DSH |
1925 | al = SSL_AD_DECRYPT_ERROR; |
1926 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 1927 | goto err; |
0f113f3e | 1928 | } |
e1e588ac | 1929 | EVP_MD_CTX_free(md_ctx); |
0f113f3e | 1930 | } else { |
7689082b | 1931 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 1932 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 1933 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 1934 | /* Might be wrong key type, check it */ |
e1e588ac | 1935 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 1936 | /* Otherwise this shouldn't happen */ |
e1e588ac | 1937 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1938 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
1939 | } else { |
1940 | al = SSL_AD_DECODE_ERROR; | |
1941 | } | |
0f113f3e MC |
1942 | goto err; |
1943 | } | |
1944 | /* still data left over */ | |
73999b62 | 1945 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 1946 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1947 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 1948 | goto err; |
0f113f3e MC |
1949 | } |
1950 | } | |
e1e588ac | 1951 | |
b9908bf9 | 1952 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 1953 | err: |
7dc1c647 MC |
1954 | if (al != -1) |
1955 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1956 | ossl_statem_set_error(s); |
b9908bf9 | 1957 | return MSG_PROCESS_ERROR; |
0f113f3e | 1958 | } |
d02b48c6 | 1959 | |
be3583fa | 1960 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1961 | { |
1962 | int ret = MSG_PROCESS_ERROR; | |
1963 | unsigned int list_len, ctype_num, i, name_len; | |
1964 | X509_NAME *xn = NULL; | |
b6981744 EK |
1965 | const unsigned char *data; |
1966 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 1967 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
1968 | |
1969 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1970 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1971 | goto err; |
1972 | } | |
1973 | ||
1974 | /* get the certificate types */ | |
73999b62 | 1975 | if (!PACKET_get_1(pkt, &ctype_num) |
a230b26e | 1976 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { |
ac112332 | 1977 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1978 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1979 | goto err; |
1980 | } | |
b548a1f1 RS |
1981 | OPENSSL_free(s->cert->ctypes); |
1982 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1983 | if (ctype_num > SSL3_CT_NUMBER) { |
1984 | /* If we exceed static buffer copy all to cert structure */ | |
1985 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1986 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1987 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1988 | goto err; |
1989 | } | |
ac112332 | 1990 | memcpy(s->cert->ctypes, data, ctype_num); |
d736bc1a | 1991 | s->cert->ctype_num = ctype_num; |
0f113f3e MC |
1992 | ctype_num = SSL3_CT_NUMBER; |
1993 | } | |
1994 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1995 | s->s3->tmp.ctype[i] = data[i]; |
1996 | ||
0f113f3e | 1997 | if (SSL_USE_SIGALGS(s)) { |
73999b62 | 1998 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 1999 | || !PACKET_get_bytes(pkt, &data, list_len)) { |
0f113f3e | 2000 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2001 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2002 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2003 | goto err; |
2004 | } | |
ac112332 | 2005 | |
0f113f3e MC |
2006 | /* Clear certificate digests and validity flags */ |
2007 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2008 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2009 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2010 | } |
ac112332 | 2011 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 2012 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2013 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2014 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2015 | goto err; | |
2016 | } | |
2017 | if (!tls1_process_sigalgs(s)) { | |
2018 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2019 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2020 | goto err; |
2021 | } | |
a0f63828 DSH |
2022 | } else { |
2023 | ssl_set_default_md(s); | |
0f113f3e MC |
2024 | } |
2025 | ||
2026 | /* get the CA RDNs */ | |
73999b62 | 2027 | if (!PACKET_get_net_2(pkt, &list_len) |
a230b26e | 2028 | || PACKET_remaining(pkt) != list_len) { |
0f113f3e | 2029 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2030 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2031 | goto err; |
2032 | } | |
2033 | ||
73999b62 MC |
2034 | while (PACKET_remaining(pkt)) { |
2035 | if (!PACKET_get_net_2(pkt, &name_len) | |
a230b26e | 2036 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { |
0f113f3e | 2037 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2038 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2039 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2040 | goto err; |
2041 | } | |
2042 | ||
ac112332 | 2043 | namestart = namebytes; |
0f113f3e | 2044 | |
ac112332 MC |
2045 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2046 | name_len)) == NULL) { | |
3c33c6f6 | 2047 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2048 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2049 | goto err; |
0f113f3e MC |
2050 | } |
2051 | ||
ac112332 | 2052 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2053 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2054 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2055 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2056 | goto err; | |
2057 | } | |
2058 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2059 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2060 | goto err; |
2061 | } | |
6afef8b1 | 2062 | xn = NULL; |
0f113f3e MC |
2063 | } |
2064 | ||
0f113f3e MC |
2065 | /* we should setup a certificate to return.... */ |
2066 | s->s3->tmp.cert_req = 1; | |
2067 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2068 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2069 | s->s3->tmp.ca_names = ca_sk; |
2070 | ca_sk = NULL; | |
2071 | ||
05c4f1d5 | 2072 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2073 | goto done; |
0f113f3e | 2074 | err: |
fe3a3291 | 2075 | ossl_statem_set_error(s); |
cc273a93 | 2076 | done: |
6afef8b1 | 2077 | X509_NAME_free(xn); |
222561fe | 2078 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2079 | return ret; |
0f113f3e MC |
2080 | } |
2081 | ||
2082 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2083 | { |
0f113f3e | 2084 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2085 | } |
dfeab068 | 2086 | |
be3583fa | 2087 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2088 | { |
2089 | int al; | |
2090 | unsigned int ticklen; | |
2091 | unsigned long ticket_lifetime_hint; | |
ec60ccc1 | 2092 | unsigned int sess_len; |
b9908bf9 | 2093 | |
73999b62 | 2094 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
a230b26e EK |
2095 | || !PACKET_get_net_2(pkt, &ticklen) |
2096 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2097 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2098 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2099 | goto f_err; |
2100 | } | |
2101 | ||
2102 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2103 | if (ticklen == 0) | |
c9de4a20 | 2104 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2105 | |
98ece4ee MC |
2106 | if (s->session->session_id_length > 0) { |
2107 | int i = s->session_ctx->session_cache_mode; | |
2108 | SSL_SESSION *new_sess; | |
2109 | /* | |
2110 | * We reused an existing session, so we need to replace it with a new | |
2111 | * one | |
2112 | */ | |
2113 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2114 | /* | |
e4612d02 | 2115 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2116 | */ |
e4612d02 | 2117 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2118 | } |
2119 | ||
2120 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2121 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2122 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2123 | goto f_err; |
2124 | } | |
2125 | ||
2126 | SSL_SESSION_free(s->session); | |
2127 | s->session = new_sess; | |
2128 | } | |
2129 | ||
b548a1f1 RS |
2130 | OPENSSL_free(s->session->tlsext_tick); |
2131 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2132 | |
0f113f3e | 2133 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 2134 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 2135 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2136 | goto err; |
2137 | } | |
73999b62 | 2138 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2139 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2140 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2141 | goto f_err; |
2142 | } | |
e711da71 EK |
2143 | |
2144 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2145 | s->session->tlsext_ticklen = ticklen; |
2146 | /* | |
2147 | * There are two ways to detect a resumed ticket session. One is to set | |
2148 | * an appropriate session ID and then the server must return a match in | |
2149 | * ServerHello. This allows the normal client session ID matching to work | |
2150 | * and we know much earlier that the ticket has been accepted. The | |
2151 | * other way is to set zero length session ID when the ticket is | |
2152 | * presented and rely on the handshake to determine session resumption. | |
2153 | * We choose the former approach because this fits in with assumptions | |
2154 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2155 | * SHA256 is disabled) hash of the ticket. | |
2156 | */ | |
ec60ccc1 MC |
2157 | /* |
2158 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2159 | * but s->session->session_id_length is a size_t | |
2160 | */ | |
d166ed8c | 2161 | if (!EVP_Digest(s->session->tlsext_tick, ticklen, |
ec60ccc1 | 2162 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2163 | EVP_sha256(), NULL)) { |
2164 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2165 | goto err; | |
2166 | } | |
ec60ccc1 | 2167 | s->session->session_id_length = sess_len; |
b9908bf9 | 2168 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2169 | f_err: |
2170 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2171 | err: | |
fe3a3291 | 2172 | ossl_statem_set_error(s); |
b9908bf9 | 2173 | return MSG_PROCESS_ERROR; |
0f113f3e | 2174 | } |
67c8e7f4 | 2175 | |
be3583fa | 2176 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2177 | { |
2178 | int al; | |
8b0e934a | 2179 | size_t resplen; |
b9908bf9 | 2180 | unsigned int type; |
b9908bf9 | 2181 | |
73999b62 | 2182 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2183 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2184 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2185 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2186 | goto f_err; |
2187 | } | |
56a26ce3 MC |
2188 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2189 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2190 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2191 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2192 | goto f_err; |
2193 | } | |
ac63710a | 2194 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2195 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2196 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2197 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2198 | goto f_err; |
2199 | } | |
73999b62 | 2200 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2201 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2202 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2203 | goto f_err; |
2204 | } | |
0f113f3e | 2205 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2206 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2207 | f_err: |
2208 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2209 | ossl_statem_set_error(s); |
b9908bf9 | 2210 | return MSG_PROCESS_ERROR; |
0f113f3e | 2211 | } |
d02b48c6 | 2212 | |
7776a36c MC |
2213 | /* |
2214 | * Perform miscellaneous checks and processing after we have received the | |
2215 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2216 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2217 | * on failure. | |
7776a36c MC |
2218 | */ |
2219 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2220 | { |
a455d0f6 MC |
2221 | /* |
2222 | * at this point we check that we have the required stuff from | |
2223 | * the server | |
2224 | */ | |
2225 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2226 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2227 | return 0; | |
a455d0f6 MC |
2228 | } |
2229 | ||
bb1aaab4 MC |
2230 | /* |
2231 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2232 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2233 | * message, or NULL and -1 otherwise | |
2234 | */ | |
b1931d43 | 2235 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2236 | int ret; |
2237 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2238 | if (ret == 0) { | |
7776a36c MC |
2239 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2240 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2241 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2242 | return 0; |
bb1aaab4 MC |
2243 | } |
2244 | if (ret < 0) { | |
7776a36c MC |
2245 | *al = SSL_AD_INTERNAL_ERROR; |
2246 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2247 | ERR_R_MALLOC_FAILURE); | |
2248 | return 0; | |
bb1aaab4 MC |
2249 | } |
2250 | } | |
ed29e82a RP |
2251 | #ifndef OPENSSL_NO_CT |
2252 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2253 | /* Note we validate the SCTs whether or not we abort on error */ |
2254 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2255 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2256 | return 0; | |
ed29e82a RP |
2257 | } |
2258 | } | |
2259 | #endif | |
2260 | ||
7776a36c MC |
2261 | return 1; |
2262 | } | |
2263 | ||
2264 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2265 | { | |
2266 | int al = SSL_AD_INTERNAL_ERROR; | |
2267 | ||
2268 | if (PACKET_remaining(pkt) > 0) { | |
2269 | /* should contain no data */ | |
2270 | al = SSL_AD_DECODE_ERROR; | |
2271 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2272 | goto err; | |
2273 | } | |
2274 | #ifndef OPENSSL_NO_SRP | |
2275 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2276 | if (SRP_Calc_A_param(s) <= 0) { | |
2277 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2278 | goto err; | |
2279 | } | |
2280 | } | |
2281 | #endif | |
2282 | ||
2283 | /* | |
2284 | * Error queue messages are generated directly by this function | |
2285 | */ | |
2286 | if (!tls_process_initial_server_flight(s, &al)) | |
2287 | goto err; | |
2288 | ||
473483d4 MC |
2289 | #ifndef OPENSSL_NO_SCTP |
2290 | /* Only applies to renegotiation */ | |
2291 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
a230b26e | 2292 | && s->renegotiate != 0) |
473483d4 MC |
2293 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2294 | else | |
2295 | #endif | |
2296 | return MSG_PROCESS_FINISHED_READING; | |
7776a36c MC |
2297 | |
2298 | err: | |
2299 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2300 | ossl_statem_set_error(s); | |
2301 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2302 | } |
176f31dd | 2303 | |
f1ec23c0 | 2304 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2305 | { |
7689082b | 2306 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2307 | int ret = 0; |
2308 | /* | |
2309 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2310 | * \0-terminated identity. The last byte is for us for simulating | |
2311 | * strnlen. | |
2312 | */ | |
2313 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2314 | size_t identitylen = 0; | |
2315 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2316 | unsigned char *tmppsk = NULL; | |
2317 | char *tmpidentity = NULL; | |
2318 | size_t psklen = 0; | |
2319 | ||
2320 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2321 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2322 | *al = SSL_AD_INTERNAL_ERROR; |
2323 | goto err; | |
2324 | } | |
d02b48c6 | 2325 | |
13c0ec4a | 2326 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2327 | |
13c0ec4a MC |
2328 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2329 | identity, sizeof(identity) - 1, | |
2330 | psk, sizeof(psk)); | |
7689082b | 2331 | |
13c0ec4a | 2332 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2333 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2334 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2335 | goto err; | |
2336 | } else if (psklen == 0) { | |
05ec6a25 | 2337 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2338 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2339 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2340 | goto err; | |
2341 | } | |
7689082b | 2342 | |
13c0ec4a MC |
2343 | identitylen = strlen(identity); |
2344 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2345 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2346 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2347 | goto err; | |
2348 | } | |
7689082b | 2349 | |
13c0ec4a MC |
2350 | tmppsk = OPENSSL_memdup(psk, psklen); |
2351 | tmpidentity = OPENSSL_strdup(identity); | |
2352 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2353 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2354 | *al = SSL_AD_INTERNAL_ERROR; |
2355 | goto err; | |
2356 | } | |
7689082b | 2357 | |
13c0ec4a MC |
2358 | OPENSSL_free(s->s3->tmp.psk); |
2359 | s->s3->tmp.psk = tmppsk; | |
2360 | s->s3->tmp.psklen = psklen; | |
2361 | tmppsk = NULL; | |
2362 | OPENSSL_free(s->session->psk_identity); | |
2363 | s->session->psk_identity = tmpidentity; | |
2364 | tmpidentity = NULL; | |
f1ec23c0 | 2365 | |
b2b3024e | 2366 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2367 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2368 | *al = SSL_AD_INTERNAL_ERROR; | |
2369 | goto err; | |
2370 | } | |
7689082b | 2371 | |
13c0ec4a | 2372 | ret = 1; |
0bce0b02 | 2373 | |
13c0ec4a MC |
2374 | err: |
2375 | OPENSSL_cleanse(psk, psklen); | |
2376 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2377 | OPENSSL_clear_free(tmppsk, psklen); | |
2378 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2379 | |
13c0ec4a MC |
2380 | return ret; |
2381 | #else | |
05ec6a25 | 2382 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2383 | *al = SSL_AD_INTERNAL_ERROR; |
2384 | return 0; | |
b9908bf9 | 2385 | #endif |
13c0ec4a | 2386 | } |
b9908bf9 | 2387 | |
f1ec23c0 | 2388 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2389 | { |
bc36ee62 | 2390 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2391 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2392 | EVP_PKEY *pkey = NULL; |
2393 | EVP_PKEY_CTX *pctx = NULL; | |
2394 | size_t enclen; | |
2395 | unsigned char *pms = NULL; | |
2396 | size_t pmslen = 0; | |
b9908bf9 | 2397 | |
13c0ec4a MC |
2398 | if (s->session->peer == NULL) { |
2399 | /* | |
2400 | * We should always have a server certificate with SSL_kRSA. | |
2401 | */ | |
05ec6a25 | 2402 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2403 | return 0; |
2404 | } | |
0f113f3e | 2405 | |
13c0ec4a MC |
2406 | pkey = X509_get0_pubkey(s->session->peer); |
2407 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2408 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2409 | return 0; |
2410 | } | |
0f113f3e | 2411 | |
13c0ec4a MC |
2412 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2413 | pms = OPENSSL_malloc(pmslen); | |
2414 | if (pms == NULL) { | |
05ec6a25 | 2415 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2416 | *al = SSL_AD_INTERNAL_ERROR; |
2417 | return 0; | |
2418 | } | |
0bce0b02 | 2419 | |
13c0ec4a MC |
2420 | pms[0] = s->client_version >> 8; |
2421 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2422 | /* TODO(size_t): Convert this function */ |
2423 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2424 | goto err; |
2425 | } | |
0f113f3e | 2426 | |
13c0ec4a | 2427 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2428 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2429 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2430 | goto err; | |
2431 | } | |
13c0ec4a MC |
2432 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2433 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2434 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2435 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2436 | goto err; |
2437 | } | |
f1ec23c0 MC |
2438 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2439 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2440 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2441 | goto err; |
2442 | } | |
13c0ec4a MC |
2443 | EVP_PKEY_CTX_free(pctx); |
2444 | pctx = NULL; | |
0f113f3e | 2445 | # ifdef PKCS1_CHECK |
13c0ec4a MC |
2446 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2447 | (*p)[1]++; | |
2448 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2449 | tmp_buf[0] = 0x70; | |
0f113f3e | 2450 | # endif |
0f113f3e | 2451 | |
13c0ec4a | 2452 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2453 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2454 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2455 | goto err; | |
b9908bf9 | 2456 | } |
13c0ec4a MC |
2457 | |
2458 | s->s3->tmp.pms = pms; | |
2459 | s->s3->tmp.pmslen = pmslen; | |
2460 | ||
2461 | return 1; | |
2462 | err: | |
2463 | OPENSSL_clear_free(pms, pmslen); | |
2464 | EVP_PKEY_CTX_free(pctx); | |
2465 | ||
2466 | return 0; | |
2467 | #else | |
05ec6a25 | 2468 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2469 | *al = SSL_AD_INTERNAL_ERROR; |
2470 | return 0; | |
f9b3bff6 | 2471 | #endif |
13c0ec4a MC |
2472 | } |
2473 | ||
f1ec23c0 | 2474 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2475 | { |
2476 | #ifndef OPENSSL_NO_DH | |
2477 | DH *dh_clnt = NULL; | |
2478 | const BIGNUM *pub_key; | |
2479 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2480 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2481 | |
2482 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2483 | if (skey == NULL) |
2484 | goto err; | |
2485 | ||
0a699a07 | 2486 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2487 | if (ckey == NULL) |
2488 | goto err; | |
2489 | ||
a8c1c704 MC |
2490 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2491 | ||
0f1e51ea | 2492 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2493 | goto err; |
a8c1c704 MC |
2494 | |
2495 | /* send off the data */ | |
2496 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2497 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2498 | goto err; |
2499 | ||
2500 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2501 | EVP_PKEY_free(ckey); |
2502 | ||
2503 | return 1; | |
f1ec23c0 MC |
2504 | err: |
2505 | EVP_PKEY_free(ckey); | |
2506 | #endif | |
05ec6a25 | 2507 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2508 | *al = SSL_AD_INTERNAL_ERROR; |
2509 | return 0; | |
a8c1c704 MC |
2510 | } |
2511 | ||
f1ec23c0 | 2512 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2513 | { |
2514 | #ifndef OPENSSL_NO_EC | |
2515 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2516 | size_t encoded_pt_len = 0; |
67ad5aab | 2517 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2518 | int ret = 0; |
67ad5aab MC |
2519 | |
2520 | skey = s->s3->peer_tmp; | |
ec24630a | 2521 | if (skey == NULL) { |
05ec6a25 | 2522 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2523 | return 0; |
2524 | } | |
2525 | ||
0a699a07 | 2526 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2527 | if (ckey == NULL) { |
2528 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2529 | goto err; | |
2530 | } | |
67ad5aab | 2531 | |
0f1e51ea | 2532 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2533 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2534 | goto err; |
2535 | } | |
2536 | ||
2537 | /* Generate encoding of client key */ | |
ec24630a | 2538 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2539 | |
2540 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2541 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2542 | goto err; |
2543 | } | |
2544 | ||
b2b3024e | 2545 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2546 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2547 | goto err; | |
2548 | } | |
67ad5aab | 2549 | |
f1ec23c0 | 2550 | ret = 1; |
67ad5aab | 2551 | err: |
f1ec23c0 | 2552 | OPENSSL_free(encodedPoint); |
67ad5aab | 2553 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2554 | return ret; |
67ad5aab | 2555 | #else |
05ec6a25 | 2556 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2557 | *al = SSL_AD_INTERNAL_ERROR; |
2558 | return 0; | |
2559 | #endif | |
2560 | } | |
2561 | ||
f1ec23c0 | 2562 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2563 | { |
2564 | #ifndef OPENSSL_NO_GOST | |
2565 | /* GOST key exchange message creation */ | |
2566 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2567 | X509 *peer_cert; | |
2568 | size_t msglen; | |
2569 | unsigned int md_len; | |
2570 | unsigned char shared_ukm[32], tmp[256]; | |
2571 | EVP_MD_CTX *ukm_hash = NULL; | |
2572 | int dgst_nid = NID_id_GostR3411_94; | |
2573 | unsigned char *pms = NULL; | |
2574 | size_t pmslen = 0; | |
2575 | ||
2576 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2577 | dgst_nid = NID_id_GostR3411_2012_256; | |
2578 | ||
2579 | /* | |
2580 | * Get server sertificate PKEY and create ctx from it | |
2581 | */ | |
2582 | peer_cert = s->session->peer; | |
2583 | if (!peer_cert) { | |
2584 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2585 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2586 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2587 | return 0; | |
2588 | } | |
2589 | ||
2590 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2591 | if (pkey_ctx == NULL) { | |
2592 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2593 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2594 | return 0; |
2595 | } | |
2596 | /* | |
2597 | * If we have send a certificate, and certificate key | |
2598 | * parameters match those of server certificate, use | |
2599 | * certificate key for key exchange | |
2600 | */ | |
2601 | ||
2602 | /* Otherwise, generate ephemeral key pair */ | |
2603 | pmslen = 32; | |
2604 | pms = OPENSSL_malloc(pmslen); | |
2605 | if (pms == NULL) { | |
2606 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2607 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2608 | goto err; |
e00e0b3d MC |
2609 | } |
2610 | ||
2611 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2612 | /* Generate session key |
2613 | * TODO(size_t): Convert this function | |
2614 | */ | |
2615 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 2616 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2617 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2618 | goto err; |
2619 | }; | |
e00e0b3d MC |
2620 | /* |
2621 | * Compute shared IV and store it in algorithm-specific context | |
2622 | * data | |
2623 | */ | |
2624 | ukm_hash = EVP_MD_CTX_new(); | |
2625 | if (ukm_hash == NULL | |
a230b26e EK |
2626 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2627 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2628 | SSL3_RANDOM_SIZE) <= 0 | |
2629 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2630 | SSL3_RANDOM_SIZE) <= 0 | |
2631 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2632 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2633 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2634 | goto err; |
2635 | } | |
2636 | EVP_MD_CTX_free(ukm_hash); | |
2637 | ukm_hash = NULL; | |
2638 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
2639 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
2640 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2641 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2642 | goto err; |
2643 | } | |
2644 | /* Make GOST keytransport blob message */ | |
2645 | /* | |
2646 | * Encapsulate it into sequence | |
2647 | */ | |
e00e0b3d MC |
2648 | msglen = 255; |
2649 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
2650 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2651 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
2652 | goto err; |
2653 | } | |
f1ec23c0 | 2654 | |
08029dfa MC |
2655 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
2656 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 2657 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
2658 | *al = SSL_AD_INTERNAL_ERROR; |
2659 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
2660 | goto err; | |
e00e0b3d | 2661 | } |
f1ec23c0 | 2662 | |
e00e0b3d MC |
2663 | EVP_PKEY_CTX_free(pkey_ctx); |
2664 | s->s3->tmp.pms = pms; | |
2665 | s->s3->tmp.pmslen = pmslen; | |
2666 | ||
2667 | return 1; | |
2668 | err: | |
2669 | EVP_PKEY_CTX_free(pkey_ctx); | |
2670 | OPENSSL_clear_free(pms, pmslen); | |
2671 | EVP_MD_CTX_free(ukm_hash); | |
2672 | return 0; | |
2673 | #else | |
05ec6a25 | 2674 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2675 | *al = SSL_AD_INTERNAL_ERROR; |
2676 | return 0; | |
2677 | #endif | |
2678 | } | |
2679 | ||
f1ec23c0 | 2680 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 2681 | { |
8b9546c7 | 2682 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
2683 | unsigned char *abytes = NULL; |
2684 | ||
2685 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
2686 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
2687 | &abytes)) { | |
05ec6a25 | 2688 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2689 | return 0; |
2690 | } | |
f1ec23c0 MC |
2691 | BN_bn2bin(s->srp_ctx.A, abytes); |
2692 | ||
840a2bf8 MC |
2693 | OPENSSL_free(s->session->srp_username); |
2694 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
2695 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 2696 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
2697 | return 0; |
2698 | } | |
2699 | ||
2700 | return 1; | |
2701 | #else | |
05ec6a25 | 2702 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
2703 | *al = SSL_AD_INTERNAL_ERROR; |
2704 | return 0; | |
2705 | #endif | |
2706 | } | |
2707 | ||
7cea05dc | 2708 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 2709 | { |
13c0ec4a MC |
2710 | unsigned long alg_k; |
2711 | int al = -1; | |
2712 | ||
f1ec23c0 | 2713 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 2714 | |
13c0ec4a | 2715 | if ((alg_k & SSL_PSK) |
7cea05dc | 2716 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
2717 | goto err; |
2718 | ||
f1ec23c0 | 2719 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 2720 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 2721 | goto err; |
a8c1c704 | 2722 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 2723 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 2724 | goto err; |
67ad5aab | 2725 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 2726 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 2727 | goto err; |
e00e0b3d | 2728 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 2729 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 2730 | goto err; |
840a2bf8 | 2731 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 2732 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 2733 | goto err; |
4a424545 | 2734 | } else if (!(alg_k & SSL_kPSK)) { |
b9908bf9 MC |
2735 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2736 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2737 | goto err; | |
2738 | } | |
2739 | ||
b9908bf9 | 2740 | return 1; |
0f113f3e | 2741 | err: |
13c0ec4a MC |
2742 | if (al != -1) |
2743 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 2744 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 2745 | s->s3->tmp.pms = NULL; |
7689082b DSH |
2746 | #ifndef OPENSSL_NO_PSK |
2747 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2748 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2749 | #endif |
b9908bf9 MC |
2750 | return 0; |
2751 | } | |
2752 | ||
2753 | int tls_client_key_exchange_post_work(SSL *s) | |
2754 | { | |
2755 | unsigned char *pms = NULL; | |
2756 | size_t pmslen = 0; | |
2757 | ||
6f137370 MC |
2758 | pms = s->s3->tmp.pms; |
2759 | pmslen = s->s3->tmp.pmslen; | |
2760 | ||
b9908bf9 MC |
2761 | #ifndef OPENSSL_NO_SRP |
2762 | /* Check for SRP */ | |
2763 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2764 | if (!srp_generate_client_master_secret(s)) { | |
2765 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2766 | ERR_R_INTERNAL_ERROR); | |
2767 | goto err; | |
2768 | } | |
2769 | return 1; | |
2770 | } | |
2771 | #endif | |
b9908bf9 MC |
2772 | |
2773 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2774 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2775 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2776 | goto err; | |
2777 | } | |
2778 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2779 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2780 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
2781 | /* ssl_generate_master_secret frees the pms even on error */ |
2782 | pms = NULL; | |
2783 | pmslen = 0; | |
b9908bf9 MC |
2784 | goto err; |
2785 | } | |
6f137370 MC |
2786 | pms = NULL; |
2787 | pmslen = 0; | |
473483d4 MC |
2788 | |
2789 | #ifndef OPENSSL_NO_SCTP | |
2790 | if (SSL_IS_DTLS(s)) { | |
2791 | unsigned char sctpauthkey[64]; | |
2792 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2793 | ||
2794 | /* | |
2795 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2796 | * used. | |
2797 | */ | |
141eb8c6 MC |
2798 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2799 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2800 | |
2801 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
2802 | sizeof(sctpauthkey), labelbuffer, |
2803 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
2804 | goto err; |
2805 | ||
2806 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2807 | sizeof(sctpauthkey), sctpauthkey); | |
2808 | } | |
2809 | #endif | |
2810 | ||
b9908bf9 MC |
2811 | return 1; |
2812 | err: | |
2813 | OPENSSL_clear_free(pms, pmslen); | |
2814 | s->s3->tmp.pms = NULL; | |
2815 | return 0; | |
0f113f3e | 2816 | } |
d02b48c6 | 2817 | |
7cea05dc | 2818 | int tls_construct_client_verify(SSL *s, WPACKET *pkt) |
0f113f3e | 2819 | { |
0f113f3e | 2820 | EVP_PKEY *pkey; |
a0f63828 | 2821 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
5a008ff6 | 2822 | EVP_MD_CTX *mctx = NULL; |
0f113f3e | 2823 | unsigned u = 0; |
a0f63828 DSH |
2824 | long hdatalen = 0; |
2825 | void *hdata; | |
6400f338 | 2826 | unsigned char *sig = NULL; |
6400f338 | 2827 | |
bfb0641f | 2828 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2829 | if (mctx == NULL) { |
2830 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2831 | goto err; | |
2832 | } | |
b9908bf9 | 2833 | pkey = s->cert->key->privatekey; |
a0f63828 DSH |
2834 | |
2835 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2836 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2837 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2838 | goto err; | |
2839 | } | |
0f1e51ea | 2840 | |
7cea05dc | 2841 | if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) { |
6400f338 MC |
2842 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2843 | goto err; | |
a0f63828 | 2844 | } |
855a54a9 | 2845 | #ifdef SSL_DEBUG |
a0f63828 | 2846 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2847 | #endif |
6400f338 MC |
2848 | sig = OPENSSL_malloc(EVP_PKEY_size(pkey)); |
2849 | if (sig == NULL) { | |
2850 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2851 | goto err; | |
2852 | } | |
6e59a892 RL |
2853 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2854 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2855 | || (s->version == SSL3_VERSION |
6e59a892 | 2856 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
348240c6 | 2857 | (int)s->session->master_key_length, |
a0f63828 | 2858 | s->session->master_key)) |
6400f338 | 2859 | || !EVP_SignFinal(mctx, sig, &u, pkey)) { |
a0f63828 DSH |
2860 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2861 | goto err; | |
2862 | } | |
2a9b9654 | 2863 | #ifndef OPENSSL_NO_GOST |
3aeb9348 DSH |
2864 | { |
2865 | int pktype = EVP_PKEY_id(pkey); | |
2866 | if (pktype == NID_id_GostR3410_2001 | |
2867 | || pktype == NID_id_GostR3410_2012_256 | |
2868 | || pktype == NID_id_GostR3410_2012_512) | |
6400f338 | 2869 | BUF_reverse(sig, NULL, u); |
b9908bf9 | 2870 | } |
2a9b9654 | 2871 | #endif |
a0f63828 | 2872 | |
7cea05dc | 2873 | if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) { |
6400f338 MC |
2874 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2875 | goto err; | |
2876 | } | |
2877 | ||
a0f63828 DSH |
2878 | /* Digest cached records and discard handshake buffer */ |
2879 | if (!ssl3_digest_cached_records(s, 0)) | |
2880 | goto err; | |
6400f338 | 2881 | |
6400f338 | 2882 | OPENSSL_free(sig); |
bfb0641f | 2883 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2884 | return 1; |
0f113f3e | 2885 | err: |
6400f338 | 2886 | OPENSSL_free(sig); |
bfb0641f | 2887 | EVP_MD_CTX_free(mctx); |
6400f338 | 2888 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 | 2889 | return 0; |
0f113f3e MC |
2890 | } |
2891 | ||
2892 | /* | |
2893 | * Check a certificate can be used for client authentication. Currently check | |
2894 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2895 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2896 | */ |
2897 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2898 | { |
0f113f3e MC |
2899 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2900 | return 0; | |
2901 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2902 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2903 | return 0; |
2904 | /* | |
2905 | * If strict mode check suitability of chain before using it. This also | |
2906 | * adjusts suite B digest if necessary. | |
2907 | */ | |
2908 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2909 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2910 | return 0; | |
0f113f3e MC |
2911 | return 1; |
2912 | } | |
0d609395 | 2913 | |
be3583fa | 2914 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2915 | { |
2916 | X509 *x509 = NULL; | |
2917 | EVP_PKEY *pkey = NULL; | |
2918 | int i; | |
2919 | ||
b9908bf9 | 2920 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2921 | /* Let cert callback update client certificates if required */ |
2922 | if (s->cert->cert_cb) { | |
2923 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2924 | if (i < 0) { | |
2925 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2926 | return WORK_MORE_A; |
0f113f3e MC |
2927 | } |
2928 | if (i == 0) { | |
2929 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2930 | ossl_statem_set_error(s); |
0f113f3e MC |
2931 | return 0; |
2932 | } | |
2933 | s->rwstate = SSL_NOTHING; | |
2934 | } | |
2935 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2936 | return WORK_FINISHED_CONTINUE; |
2937 | ||
2938 | /* Fall through to WORK_MORE_B */ | |
2939 | wst = WORK_MORE_B; | |
0f113f3e MC |
2940 | } |
2941 | ||
2942 | /* We need to get a client cert */ | |
b9908bf9 | 2943 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2944 | /* |
2945 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2946 | * return(-1); We then get retied later | |
2947 | */ | |
0f113f3e MC |
2948 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2949 | if (i < 0) { | |
2950 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2951 | return WORK_MORE_B; |
0f113f3e MC |
2952 | } |
2953 | s->rwstate = SSL_NOTHING; | |
2954 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2955 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2956 | i = 0; | |
2957 | } else if (i == 1) { | |
2958 | i = 0; | |
b9908bf9 | 2959 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2960 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2961 | } | |
2962 | ||
222561fe | 2963 | X509_free(x509); |
25aaa98a | 2964 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2965 | if (i && !ssl3_check_client_certificate(s)) |
2966 | i = 0; | |
2967 | if (i == 0) { | |
2968 | if (s->version == SSL3_VERSION) { | |
2969 | s->s3->tmp.cert_req = 0; | |
2970 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2971 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2972 | } else { |
2973 | s->s3->tmp.cert_req = 2; | |
124037fd | 2974 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2975 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2976 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2977 | return 0; |
2978 | } | |
0f113f3e MC |
2979 | } |
2980 | } | |
2981 | ||
b9908bf9 | 2982 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2983 | } |
2984 | ||
b9908bf9 MC |
2985 | /* Shouldn't ever get here */ |
2986 | return WORK_ERROR; | |
2987 | } | |
2988 | ||
7cea05dc | 2989 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 2990 | { |
7cea05dc | 2991 | if (!ssl3_output_cert_chain(s, pkt, |
b90506e9 MC |
2992 | (s->s3->tmp.cert_req == 2) ? NULL |
2993 | : s->cert->key)) { | |
b9908bf9 MC |
2994 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
2995 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2996 | return 0; |
0f113f3e | 2997 | } |
b9908bf9 MC |
2998 | |
2999 | return 1; | |
0f113f3e MC |
3000 | } |
3001 | ||
3002 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3003 | |
36d16f8e | 3004 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3005 | { |
60f43e9e RL |
3006 | int i; |
3007 | #ifndef OPENSSL_NO_EC | |
3008 | int idx; | |
3009 | #endif | |
0f113f3e MC |
3010 | long alg_k, alg_a; |
3011 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3012 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3013 | |
0f113f3e MC |
3014 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3015 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3016 | |
0f113f3e | 3017 | /* we don't have a certificate */ |
55a9a16f | 3018 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3019 | return (1); |
d02b48c6 | 3020 | |
0f113f3e | 3021 | /* This is the passed certificate */ |
d02b48c6 | 3022 | |
10bf4fc2 | 3023 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3024 | idx = s->session->peer_type; |
0f113f3e | 3025 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3026 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3027 | /* check failed */ |
3028 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3029 | goto f_err; | |
3030 | } else { | |
3031 | return 1; | |
3032 | } | |
3033 | } else if (alg_a & SSL_aECDSA) { | |
3034 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3035 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3036 | goto f_err; | |
0f113f3e MC |
3037 | } |
3038 | #endif | |
8382fd3a | 3039 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3040 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3041 | |
3042 | /* Check that we have a certificate if we require one */ | |
3043 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3044 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3045 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3046 | goto f_err; | |
3047 | } | |
bc36ee62 | 3048 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3049 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3050 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3051 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3052 | goto f_err; | |
3053 | } | |
d02b48c6 | 3054 | #endif |
bc36ee62 | 3055 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3056 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3057 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3058 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3059 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3060 | goto f_err; | |
0f113f3e | 3061 | } |
79df9d62 | 3062 | #endif |
bc36ee62 | 3063 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3064 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3065 | al = SSL_AD_INTERNAL_ERROR; |
3066 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3067 | goto f_err; |
0f113f3e | 3068 | } |
d02b48c6 RE |
3069 | #endif |
3070 | ||
0f113f3e MC |
3071 | return (1); |
3072 | f_err: | |
26c79d56 | 3073 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3074 | return (0); |
3075 | } | |
3076 | ||
e481f9b9 | 3077 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3078 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3079 | { |
15e6be6c MC |
3080 | size_t len, padding_len; |
3081 | unsigned char *padding = NULL; | |
15e6be6c | 3082 | |
b9908bf9 MC |
3083 | len = s->next_proto_negotiated_len; |
3084 | padding_len = 32 - ((len + 2) % 32); | |
15e6be6c | 3085 | |
7cea05dc MC |
3086 | if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len) |
3087 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { | |
15e6be6c MC |
3088 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3089 | goto err; | |
3090 | } | |
3091 | ||
3092 | memset(padding, 0, padding_len); | |
3093 | ||
b9908bf9 | 3094 | return 1; |
15e6be6c | 3095 | err: |
15e6be6c MC |
3096 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3097 | return 0; | |
b9908bf9 | 3098 | } |
6434abbf | 3099 | #endif |
368888bc | 3100 | |
e46f2334 MC |
3101 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3102 | { | |
3103 | int al = SSL_AD_INTERNAL_ERROR; | |
3104 | PACKET extensions; | |
3105 | ||
3106 | /* TODO(TLS1.3): We need to process these extensions. For now ignore them */ | |
3107 | if (!PACKET_as_length_prefixed_2(pkt, &extensions)) { | |
3108 | al = SSL_AD_DECODE_ERROR; | |
3109 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3110 | goto err; | |
3111 | } | |
3112 | ||
3113 | return MSG_PROCESS_CONTINUE_READING; | |
3114 | ||
3115 | err: | |
3116 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3117 | ossl_statem_set_error(s); | |
3118 | return MSG_PROCESS_ERROR; | |
3119 | } | |
3120 | ||
368888bc | 3121 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3122 | { |
3123 | int i = 0; | |
368888bc | 3124 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3125 | if (s->ctx->client_cert_engine) { |
3126 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3127 | SSL_get_client_CA_list(s), | |
3128 | px509, ppkey, NULL, NULL, NULL); | |
3129 | if (i != 0) | |
3130 | return i; | |
3131 | } | |
3132 | #endif | |
3133 | if (s->ctx->client_cert_cb) | |
3134 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3135 | return i; | |
3136 | } | |
d45ba43d | 3137 | |
ae2f7b37 | 3138 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3139 | { |
2c7b4dbc MC |
3140 | int i; |
3141 | size_t totlen = 0, len, maxlen; | |
d45ba43d MC |
3142 | int empty_reneg_info_scsv = !s->renegotiate; |
3143 | /* Set disabled masks for this session */ | |
3144 | ssl_set_client_disabled(s); | |
3145 | ||
3146 | if (sk == NULL) | |
3147 | return (0); | |
d45ba43d | 3148 | |
2c7b4dbc MC |
3149 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3150 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3151 | # error Max cipher length too short | |
3152 | # endif | |
3153 | /* | |
3154 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3155 | * chop number of supported ciphers to keep it well below this if we | |
3156 | * use TLS v1.2 | |
3157 | */ | |
3158 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3159 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3160 | else | |
3161 | #endif | |
3162 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3163 | maxlen = 0xfffe; | |
3164 | ||
3165 | if (empty_reneg_info_scsv) | |
3166 | maxlen -= 2; | |
3167 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3168 | maxlen -= 2; | |
3169 | ||
3170 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3171 | const SSL_CIPHER *c; | |
3172 | ||
d45ba43d MC |
3173 | c = sk_SSL_CIPHER_value(sk, i); |
3174 | /* Skip disabled ciphers */ | |
3175 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3176 | continue; | |
2c7b4dbc MC |
3177 | |
3178 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3179 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3180 | return 0; | |
3181 | } | |
3182 | ||
3183 | totlen += len; | |
d45ba43d | 3184 | } |
2c7b4dbc MC |
3185 | |
3186 | if (totlen == 0) { | |
3187 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); | |
3188 | return 0; | |
3189 | } | |
3190 | ||
3191 | if (totlen != 0) { | |
d45ba43d MC |
3192 | if (empty_reneg_info_scsv) { |
3193 | static SSL_CIPHER scsv = { | |
3194 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3195 | }; | |
2c7b4dbc MC |
3196 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3197 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3198 | return 0; | |
3199 | } | |
d45ba43d MC |
3200 | } |
3201 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3202 | static SSL_CIPHER scsv = { | |
3203 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3204 | }; | |
2c7b4dbc MC |
3205 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3206 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3207 | return 0; | |
3208 | } | |
d45ba43d MC |
3209 | } |
3210 | } | |
3211 | ||
2c7b4dbc | 3212 | return 1; |
d45ba43d | 3213 | } |