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Commit | Line | Data |
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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
846e33c7 RS |
6 | * Licensed under the OpenSSL license (the "License"). You may not use |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
8ba708e5 | 14 | #include "../ssl_locl.h" |
61ae935a | 15 | #include "statem_locl.h" |
ec577822 BM |
16 | #include <openssl/buffer.h> |
17 | #include <openssl/rand.h> | |
18 | #include <openssl/objects.h> | |
19 | #include <openssl/evp.h> | |
dbad1690 | 20 | #include <openssl/md5.h> |
3c27208f | 21 | #include <openssl/dh.h> |
d095b68d | 22 | #include <openssl/bn.h> |
3c27208f | 23 | #include <openssl/engine.h> |
f9b3bff6 | 24 | |
597c51bc | 25 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
26 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
27 | ||
7ab09630 | 28 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 29 | static int key_exchange_expected(SSL *s); |
d45ba43d | 30 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 31 | WPACKET *pkt); |
ea262260 | 32 | |
61ae935a MC |
33 | /* |
34 | * Is a CertificateRequest message allowed at the moment or not? | |
35 | * | |
36 | * Return values are: | |
37 | * 1: Yes | |
38 | * 0: No | |
39 | */ | |
7ab09630 | 40 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
41 | { |
42 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 43 | if ((s->version > SSL3_VERSION |
a230b26e EK |
44 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
45 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
46 | return 0; |
47 | ||
48 | return 1; | |
49 | } | |
50 | ||
51 | /* | |
a455d0f6 | 52 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
53 | * |
54 | * Return values are: | |
55 | * 1: Yes | |
56 | * 0: No | |
57 | */ | |
a455d0f6 | 58 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
59 | { |
60 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
61 | ||
62 | /* | |
63 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 64 | * ciphersuite or for SRP |
61ae935a | 65 | */ |
a455d0f6 MC |
66 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
67 | | SSL_kSRP)) { | |
68 | return 1; | |
61ae935a MC |
69 | } |
70 | ||
a455d0f6 | 71 | return 0; |
61ae935a MC |
72 | } |
73 | ||
0f1e51ea MC |
74 | /* |
75 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
76 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
77 | * server. The message type that the server has sent is provided in |mt|. The | |
78 | * current state is in |s->statem.hand_state|. | |
79 | * | |
94ed2c67 MC |
80 | * Return values are 1 for success (transition allowed) and 0 on error |
81 | * (transition not allowed) | |
0f1e51ea MC |
82 | */ |
83 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
84 | { | |
85 | OSSL_STATEM *st = &s->statem; | |
86 | ||
87 | /* | |
88 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
89 | * yet negotiated TLSv1.3 at that point so that is handled by | |
90 | * ossl_statem_client_read_transition() | |
91 | */ | |
92 | ||
93 | switch (st->hand_state) { | |
94 | default: | |
95 | break; | |
96 | ||
3847d426 MC |
97 | case TLS_ST_CW_CLNT_HELLO: |
98 | /* | |
99 | * This must a ClientHello following a HelloRetryRequest, so the only | |
100 | * thing we can get now is a ServerHello. | |
101 | */ | |
102 | if (mt == SSL3_MT_SERVER_HELLO) { | |
103 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
104 | return 1; | |
105 | } | |
106 | break; | |
107 | ||
0f1e51ea | 108 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
109 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
110 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
111 | return 1; | |
112 | } | |
113 | break; | |
114 | ||
115 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 116 | if (s->hit) { |
92760c21 MC |
117 | if (mt == SSL3_MT_FINISHED) { |
118 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
119 | return 1; |
120 | } | |
121 | } else { | |
92760c21 MC |
122 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
123 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
124 | return 1; | |
f5ca0b04 MC |
125 | } |
126 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
127 | st->hand_state = TLS_ST_CR_CERT; |
128 | return 1; | |
129 | } | |
130 | } | |
131 | break; | |
132 | ||
92760c21 MC |
133 | case TLS_ST_CR_CERT_REQ: |
134 | if (mt == SSL3_MT_CERTIFICATE) { | |
135 | st->hand_state = TLS_ST_CR_CERT; | |
136 | return 1; | |
137 | } | |
138 | break; | |
139 | ||
0f1e51ea | 140 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
141 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
142 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
143 | return 1; | |
144 | } | |
145 | break; | |
146 | ||
147 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
148 | if (mt == SSL3_MT_FINISHED) { |
149 | st->hand_state = TLS_ST_CR_FINISHED; | |
150 | return 1; | |
151 | } | |
152 | break; | |
cc2455bf MC |
153 | |
154 | case TLS_ST_OK: | |
155 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
156 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
157 | return 1; | |
158 | } | |
e1c3de44 MC |
159 | if (mt == SSL3_MT_KEY_UPDATE) { |
160 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
161 | return 1; | |
162 | } | |
cc2455bf | 163 | break; |
0f1e51ea MC |
164 | } |
165 | ||
0f1e51ea | 166 | /* No valid transition found */ |
0f1e51ea MC |
167 | return 0; |
168 | } | |
169 | ||
61ae935a | 170 | /* |
8481f583 MC |
171 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
172 | * handshake state transitions when the client is reading messages from the | |
173 | * server. The message type that the server has sent is provided in |mt|. The | |
174 | * current state is in |s->statem.hand_state|. | |
61ae935a | 175 | * |
94ed2c67 MC |
176 | * Return values are 1 for success (transition allowed) and 0 on error |
177 | * (transition not allowed) | |
61ae935a | 178 | */ |
8481f583 | 179 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 180 | { |
d6f1a6e9 | 181 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 182 | int ske_expected; |
61ae935a | 183 | |
0f1e51ea | 184 | /* |
3847d426 MC |
185 | * Note that after writing the first ClientHello we don't know what version |
186 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 187 | */ |
f5ca0b04 | 188 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
189 | if (!ossl_statem_client13_read_transition(s, mt)) |
190 | goto err; | |
191 | return 1; | |
192 | } | |
0f1e51ea | 193 | |
a230b26e | 194 | switch (st->hand_state) { |
f3b3d7f0 RS |
195 | default: |
196 | break; | |
197 | ||
61ae935a MC |
198 | case TLS_ST_CW_CLNT_HELLO: |
199 | if (mt == SSL3_MT_SERVER_HELLO) { | |
200 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
201 | return 1; | |
202 | } | |
203 | ||
204 | if (SSL_IS_DTLS(s)) { | |
205 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
206 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
207 | return 1; | |
208 | } | |
209 | } | |
210 | break; | |
211 | ||
d7f8783f | 212 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
213 | /* |
214 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
215 | * data. The only thing allowed now is a ServerHello or a | |
216 | * HelloRetryRequest. | |
217 | */ | |
218 | if (mt == SSL3_MT_SERVER_HELLO) { | |
219 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
220 | return 1; | |
221 | } | |
4004ce5f MC |
222 | break; |
223 | ||
61ae935a MC |
224 | case TLS_ST_CR_SRVR_HELLO: |
225 | if (s->hit) { | |
aff8c126 | 226 | if (s->ext.ticket_expected) { |
61ae935a MC |
227 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
228 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
229 | return 1; | |
230 | } | |
231 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
232 | st->hand_state = TLS_ST_CR_CHANGE; | |
233 | return 1; | |
234 | } | |
235 | } else { | |
236 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
237 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
238 | return 1; | |
ad3819c2 | 239 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
240 | && s->ext.session_secret_cb != NULL |
241 | && s->session->ext.tick != NULL | |
a230b26e | 242 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
243 | /* |
244 | * Normally, we can tell if the server is resuming the session | |
245 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
246 | * the next server message after the ServerHello to determine if | |
247 | * the server is resuming. | |
248 | */ | |
249 | s->hit = 1; | |
250 | st->hand_state = TLS_ST_CR_CHANGE; | |
251 | return 1; | |
61ae935a | 252 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 253 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
254 | if (mt == SSL3_MT_CERTIFICATE) { |
255 | st->hand_state = TLS_ST_CR_CERT; | |
256 | return 1; | |
257 | } | |
258 | } else { | |
a455d0f6 | 259 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
260 | /* SKE is optional for some PSK ciphersuites */ |
261 | if (ske_expected | |
a230b26e EK |
262 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
263 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
264 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
265 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
266 | return 1; | |
267 | } | |
268 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
269 | && cert_req_allowed(s)) { |
270 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
271 | return 1; | |
a455d0f6 | 272 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
273 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
274 | return 1; | |
61ae935a MC |
275 | } |
276 | } | |
277 | } | |
278 | break; | |
279 | ||
280 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
281 | /* |
282 | * The CertificateStatus message is optional even if | |
aff8c126 | 283 | * |ext.status_expected| is set |
bb1aaab4 | 284 | */ |
aff8c126 | 285 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
286 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
287 | return 1; | |
a455d0f6 MC |
288 | } |
289 | /* Fall through */ | |
290 | ||
291 | case TLS_ST_CR_CERT_STATUS: | |
292 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 293 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
294 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
295 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
296 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
297 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
298 | return 1; | |
61ae935a | 299 | } |
672f3337 | 300 | goto err; |
61ae935a | 301 | } |
a455d0f6 | 302 | /* Fall through */ |
61ae935a | 303 | |
a455d0f6 MC |
304 | case TLS_ST_CR_KEY_EXCH: |
305 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
306 | if (cert_req_allowed(s)) { | |
61ae935a MC |
307 | st->hand_state = TLS_ST_CR_CERT_REQ; |
308 | return 1; | |
61ae935a | 309 | } |
672f3337 | 310 | goto err; |
61ae935a | 311 | } |
a455d0f6 | 312 | /* Fall through */ |
61ae935a MC |
313 | |
314 | case TLS_ST_CR_CERT_REQ: | |
315 | if (mt == SSL3_MT_SERVER_DONE) { | |
316 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
317 | return 1; | |
318 | } | |
319 | break; | |
320 | ||
321 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 322 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
323 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
324 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
325 | return 1; | |
326 | } | |
61ae935a MC |
327 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
328 | st->hand_state = TLS_ST_CR_CHANGE; | |
329 | return 1; | |
330 | } | |
331 | break; | |
332 | ||
333 | case TLS_ST_CR_SESSION_TICKET: | |
334 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
335 | st->hand_state = TLS_ST_CR_CHANGE; | |
336 | return 1; | |
337 | } | |
338 | break; | |
339 | ||
340 | case TLS_ST_CR_CHANGE: | |
341 | if (mt == SSL3_MT_FINISHED) { | |
342 | st->hand_state = TLS_ST_CR_FINISHED; | |
343 | return 1; | |
344 | } | |
345 | break; | |
c7f47786 MC |
346 | |
347 | case TLS_ST_OK: | |
4004ce5f | 348 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
349 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
350 | return 1; | |
351 | } | |
352 | break; | |
61ae935a MC |
353 | } |
354 | ||
672f3337 | 355 | err: |
61ae935a | 356 | /* No valid transition found */ |
f63a17d6 MC |
357 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
358 | SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, | |
359 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
360 | return 0; |
361 | } | |
362 | ||
363 | /* | |
0f1e51ea MC |
364 | * ossl_statem_client13_write_transition() works out what handshake state to |
365 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
366 | * server. | |
0f1e51ea MC |
367 | */ |
368 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
369 | { | |
370 | OSSL_STATEM *st = &s->statem; | |
371 | ||
372 | /* | |
3847d426 MC |
373 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
374 | * TLSv1.3 yet at that point. They are handled by | |
375 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
376 | */ |
377 | switch (st->hand_state) { | |
378 | default: | |
379 | /* Shouldn't happen */ | |
a2c2e000 MC |
380 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
381 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
382 | ERR_R_INTERNAL_ERROR); | |
0f1e51ea MC |
383 | return WRITE_TRAN_ERROR; |
384 | ||
92760c21 | 385 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
386 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
387 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 388 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 389 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 390 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 391 | st->hand_state = TLS_ST_CW_CHANGE; |
564547e4 MC |
392 | else |
393 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT | |
394 | : TLS_ST_CW_FINISHED; | |
395 | return WRITE_TRAN_CONTINUE; | |
396 | ||
d7f8783f | 397 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
398 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
399 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
400 | return WRITE_TRAN_CONTINUE; | |
401 | } | |
402 | /* Fall through */ | |
403 | ||
404 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 405 | case TLS_ST_CW_CHANGE: |
94ed2c67 | 406 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 407 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
408 | return WRITE_TRAN_CONTINUE; |
409 | ||
410 | case TLS_ST_CW_CERT: | |
411 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 412 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 413 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
414 | return WRITE_TRAN_CONTINUE; |
415 | ||
416 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
417 | st->hand_state = TLS_ST_CW_FINISHED; |
418 | return WRITE_TRAN_CONTINUE; | |
419 | ||
e1c3de44 | 420 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
421 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
422 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
423 | return WRITE_TRAN_CONTINUE; | |
424 | } | |
425 | /* Fall through */ | |
426 | ||
9412b3ad | 427 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 428 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 429 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 430 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 431 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
432 | |
433 | case TLS_ST_OK: | |
9412b3ad MC |
434 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
435 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
436 | return WRITE_TRAN_CONTINUE; | |
437 | } | |
438 | ||
439 | /* Try to read from the server instead */ | |
cc2455bf | 440 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
441 | } |
442 | } | |
443 | ||
444 | /* | |
445 | * ossl_statem_client_write_transition() works out what handshake state to | |
446 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 447 | */ |
8481f583 | 448 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 449 | { |
d6f1a6e9 | 450 | OSSL_STATEM *st = &s->statem; |
61ae935a | 451 | |
0f1e51ea MC |
452 | /* |
453 | * Note that immediately before/after a ClientHello we don't know what | |
454 | * version we are going to negotiate yet, so we don't take this branch until | |
455 | * later | |
456 | */ | |
f5ca0b04 | 457 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
458 | return ossl_statem_client13_write_transition(s); |
459 | ||
a230b26e | 460 | switch (st->hand_state) { |
f3b3d7f0 RS |
461 | default: |
462 | /* Shouldn't happen */ | |
a2c2e000 MC |
463 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
464 | SSL_F_OSSL_STATEM_CLIENT_WRITE_TRANSITION, | |
465 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
466 | return WRITE_TRAN_ERROR; |
467 | ||
a230b26e | 468 | case TLS_ST_OK: |
c7f47786 MC |
469 | if (!s->renegotiate) { |
470 | /* | |
471 | * We haven't requested a renegotiation ourselves so we must have | |
472 | * received a message from the server. Better read it. | |
473 | */ | |
474 | return WRITE_TRAN_FINISHED; | |
475 | } | |
018fcbec BE |
476 | /* Renegotiation */ |
477 | /* fall thru */ | |
a230b26e EK |
478 | case TLS_ST_BEFORE: |
479 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
480 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 481 | |
a230b26e | 482 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
483 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
484 | /* | |
485 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
486 | * actually selected a version yet. | |
487 | */ | |
066904cc MC |
488 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
489 | st->hand_state = TLS_ST_CW_CHANGE; | |
490 | else | |
491 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
492 | return WRITE_TRAN_CONTINUE; |
493 | } | |
a230b26e EK |
494 | /* |
495 | * No transition at the end of writing because we don't know what | |
496 | * we will be sent | |
497 | */ | |
498 | return WRITE_TRAN_FINISHED; | |
61ae935a | 499 | |
597c51bc | 500 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
501 | /* |
502 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
503 | * CCS unless middlebox compat mode is off, or we already issued one | |
504 | * because we did early data. | |
505 | */ | |
506 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
507 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
508 | st->hand_state = TLS_ST_CW_CHANGE; | |
509 | else | |
510 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
511 | return WRITE_TRAN_CONTINUE; |
512 | ||
d7f8783f | 513 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
514 | return WRITE_TRAN_FINISHED; |
515 | ||
a230b26e EK |
516 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
517 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
518 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 519 | |
a230b26e EK |
520 | case TLS_ST_CR_SRVR_DONE: |
521 | if (s->s3->tmp.cert_req) | |
522 | st->hand_state = TLS_ST_CW_CERT; | |
523 | else | |
61ae935a | 524 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 525 | return WRITE_TRAN_CONTINUE; |
61ae935a | 526 | |
a230b26e EK |
527 | case TLS_ST_CW_CERT: |
528 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
529 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 530 | |
a230b26e EK |
531 | case TLS_ST_CW_KEY_EXCH: |
532 | /* | |
533 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
534 | * sent, but no verify packet is sent | |
535 | */ | |
536 | /* | |
537 | * XXX: For now, we do not support client authentication in ECDH | |
538 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
539 | * need to skip the certificate verify message when client's | |
540 | * ECDH public key is sent inside the client certificate. | |
541 | */ | |
542 | if (s->s3->tmp.cert_req == 1) { | |
543 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
544 | } else { | |
61ae935a | 545 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
546 | } |
547 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
548 | st->hand_state = TLS_ST_CW_CHANGE; | |
549 | } | |
550 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 551 | |
a230b26e EK |
552 | case TLS_ST_CW_CERT_VRFY: |
553 | st->hand_state = TLS_ST_CW_CHANGE; | |
554 | return WRITE_TRAN_CONTINUE; | |
555 | ||
556 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
557 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
558 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
559 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
560 | st->hand_state = TLS_ST_EARLY_DATA; |
561 | } else { | |
61ae935a | 562 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 563 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc MC |
564 | #else |
565 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) | |
566 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
567 | else | |
568 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 569 | #endif |
066904cc | 570 | } |
a230b26e | 571 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
572 | |
573 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
574 | case TLS_ST_CW_NEXT_PROTO: |
575 | st->hand_state = TLS_ST_CW_FINISHED; | |
576 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
577 | #endif |
578 | ||
a230b26e EK |
579 | case TLS_ST_CW_FINISHED: |
580 | if (s->hit) { | |
581 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
582 | return WRITE_TRAN_CONTINUE; |
583 | } else { | |
584 | return WRITE_TRAN_FINISHED; | |
585 | } | |
61ae935a | 586 | |
a230b26e EK |
587 | case TLS_ST_CR_FINISHED: |
588 | if (s->hit) { | |
589 | st->hand_state = TLS_ST_CW_CHANGE; | |
590 | return WRITE_TRAN_CONTINUE; | |
591 | } else { | |
592 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
593 | return WRITE_TRAN_CONTINUE; |
594 | } | |
c7f47786 MC |
595 | |
596 | case TLS_ST_CR_HELLO_REQ: | |
597 | /* | |
598 | * If we can renegotiate now then do so, otherwise wait for a more | |
599 | * convenient time. | |
600 | */ | |
601 | if (ssl3_renegotiate_check(s, 1)) { | |
602 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 603 | /* SSLfatal() already called */ |
c7f47786 MC |
604 | return WRITE_TRAN_ERROR; |
605 | } | |
606 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
607 | return WRITE_TRAN_CONTINUE; | |
608 | } | |
609 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 610 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
611 | } |
612 | } | |
613 | ||
614 | /* | |
615 | * Perform any pre work that needs to be done prior to sending a message from | |
616 | * the client to the server. | |
617 | */ | |
8481f583 | 618 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 619 | { |
d6f1a6e9 | 620 | OSSL_STATEM *st = &s->statem; |
61ae935a | 621 | |
a230b26e | 622 | switch (st->hand_state) { |
f3b3d7f0 RS |
623 | default: |
624 | /* No pre work to be done */ | |
625 | break; | |
626 | ||
61ae935a MC |
627 | case TLS_ST_CW_CLNT_HELLO: |
628 | s->shutdown = 0; | |
629 | if (SSL_IS_DTLS(s)) { | |
630 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 631 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 632 | /* SSLfatal() already called */ |
2c4a056f MC |
633 | return WORK_ERROR; |
634 | } | |
61ae935a MC |
635 | } |
636 | break; | |
637 | ||
61ae935a MC |
638 | case TLS_ST_CW_CHANGE: |
639 | if (SSL_IS_DTLS(s)) { | |
640 | if (s->hit) { | |
641 | /* | |
642 | * We're into the last flight so we don't retransmit these | |
643 | * messages unless we need to. | |
644 | */ | |
645 | st->use_timer = 0; | |
646 | } | |
647 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
648 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
649 | /* Calls SSLfatal() as required */ | |
61ae935a | 650 | return dtls_wait_for_dry(s); |
a2c2e000 | 651 | } |
61ae935a MC |
652 | #endif |
653 | } | |
f3b3d7f0 | 654 | break; |
61ae935a | 655 | |
d7f8783f | 656 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
657 | /* |
658 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
659 | * attempt to write early data before calling SSL_read() then we press | |
660 | * on with the handshake. Otherwise we pause here. | |
661 | */ | |
662 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
663 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
664 | return WORK_FINISHED_CONTINUE; | |
665 | /* Fall through */ | |
666 | ||
667 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
668 | return tls_finish_handshake(s, wst, 0, 1); |
669 | ||
61ae935a | 670 | case TLS_ST_OK: |
a2c2e000 | 671 | /* Calls SSLfatal() as required */ |
2a8db717 | 672 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
673 | } |
674 | ||
675 | return WORK_FINISHED_CONTINUE; | |
676 | } | |
677 | ||
678 | /* | |
679 | * Perform any work that needs to be done after sending a message from the | |
680 | * client to the server. | |
681 | */ | |
8481f583 | 682 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 683 | { |
d6f1a6e9 | 684 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
685 | |
686 | s->init_num = 0; | |
687 | ||
a230b26e | 688 | switch (st->hand_state) { |
f3b3d7f0 RS |
689 | default: |
690 | /* No post work to be done */ | |
691 | break; | |
692 | ||
61ae935a | 693 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 694 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 695 | && s->max_early_data > 0) { |
6cb42265 MC |
696 | /* |
697 | * We haven't selected TLSv1.3 yet so we don't call the change | |
698 | * cipher state function associated with the SSL_METHOD. Instead | |
699 | * we call tls13_change_cipher_state() directly. | |
700 | */ | |
5cc807da | 701 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
702 | if (!tls13_change_cipher_state(s, |
703 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
704 | /* SSLfatal() already called */ | |
705 | return WORK_ERROR; | |
706 | } | |
a2c2e000 | 707 | } |
5cc807da MC |
708 | /* else we're in compat mode so we delay flushing until after CCS */ |
709 | } else if (!statem_flush(s)) { | |
710 | return WORK_MORE_A; | |
711 | } | |
712 | ||
713 | if (SSL_IS_DTLS(s)) { | |
714 | /* Treat the next message as the first packet */ | |
715 | s->first_packet = 1; | |
6cb42265 | 716 | } |
61ae935a MC |
717 | break; |
718 | ||
ef6c191b MC |
719 | case TLS_ST_CW_END_OF_EARLY_DATA: |
720 | /* | |
721 | * We set the enc_write_ctx back to NULL because we may end up writing | |
722 | * in cleartext again if we get a HelloRetryRequest from the server. | |
723 | */ | |
724 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
725 | s->enc_write_ctx = NULL; | |
726 | break; | |
727 | ||
61ae935a | 728 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
729 | if (tls_client_key_exchange_post_work(s) == 0) { |
730 | /* SSLfatal() already called */ | |
61ae935a | 731 | return WORK_ERROR; |
a2c2e000 | 732 | } |
61ae935a MC |
733 | break; |
734 | ||
735 | case TLS_ST_CW_CHANGE: | |
318d3c0e | 736 | if (SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING) |
4d02f870 | 737 | break; |
066904cc MC |
738 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
739 | && s->max_early_data > 0) { | |
740 | /* | |
741 | * We haven't selected TLSv1.3 yet so we don't call the change | |
742 | * cipher state function associated with the SSL_METHOD. Instead | |
743 | * we call tls13_change_cipher_state() directly. | |
744 | */ | |
745 | if (!tls13_change_cipher_state(s, | |
746 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
747 | return WORK_ERROR; | |
748 | break; | |
749 | } | |
61ae935a MC |
750 | s->session->cipher = s->s3->tmp.new_cipher; |
751 | #ifdef OPENSSL_NO_COMP | |
752 | s->session->compress_meth = 0; | |
753 | #else | |
754 | if (s->s3->tmp.new_compression == NULL) | |
755 | s->session->compress_meth = 0; | |
756 | else | |
757 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
758 | #endif | |
a2c2e000 MC |
759 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
760 | /* SSLfatal() already called */ | |
61ae935a | 761 | return WORK_ERROR; |
a2c2e000 | 762 | } |
61ae935a MC |
763 | |
764 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
765 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
766 | /* SSLfatal() already called */ | |
61ae935a | 767 | return WORK_ERROR; |
a2c2e000 | 768 | } |
61ae935a MC |
769 | |
770 | if (SSL_IS_DTLS(s)) { | |
771 | #ifndef OPENSSL_NO_SCTP | |
772 | if (s->hit) { | |
773 | /* | |
774 | * Change to new shared key of SCTP-Auth, will be ignored if | |
775 | * no SCTP used. | |
776 | */ | |
777 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
778 | 0, NULL); | |
779 | } | |
780 | #endif | |
781 | ||
782 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
783 | } | |
784 | break; | |
785 | ||
786 | case TLS_ST_CW_FINISHED: | |
787 | #ifndef OPENSSL_NO_SCTP | |
788 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
789 | /* | |
790 | * Change to new shared key of SCTP-Auth, will be ignored if | |
791 | * no SCTP used. | |
792 | */ | |
793 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
794 | 0, NULL); | |
795 | } | |
796 | #endif | |
797 | if (statem_flush(s) != 1) | |
798 | return WORK_MORE_B; | |
92760c21 MC |
799 | |
800 | if (SSL_IS_TLS13(s)) { | |
801 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
802 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
803 | /* SSLfatal() already called */ | |
804 | return WORK_ERROR; | |
805 | } | |
92760c21 | 806 | } |
61ae935a | 807 | break; |
9412b3ad MC |
808 | |
809 | case TLS_ST_CW_KEY_UPDATE: | |
810 | if (statem_flush(s) != 1) | |
811 | return WORK_MORE_A; | |
a2c2e000 MC |
812 | if (!tls13_update_key(s, 1)) { |
813 | /* SSLfatal() already called */ | |
57389a32 | 814 | return WORK_ERROR; |
a2c2e000 | 815 | } |
9412b3ad | 816 | break; |
61ae935a MC |
817 | } |
818 | ||
819 | return WORK_FINISHED_CONTINUE; | |
820 | } | |
821 | ||
822 | /* | |
6392fb8e MC |
823 | * Get the message construction function and message type for sending from the |
824 | * client | |
61ae935a MC |
825 | * |
826 | * Valid return values are: | |
827 | * 1: Success | |
828 | * 0: Error | |
829 | */ | |
6392fb8e | 830 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 831 | confunc_f *confunc, int *mt) |
61ae935a | 832 | { |
d6f1a6e9 | 833 | OSSL_STATEM *st = &s->statem; |
61ae935a | 834 | |
4a01c59f MC |
835 | switch (st->hand_state) { |
836 | default: | |
837 | /* Shouldn't happen */ | |
f63a17d6 MC |
838 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
839 | SSL_F_OSSL_STATEM_CLIENT_CONSTRUCT_MESSAGE, | |
840 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
841 | return 0; |
842 | ||
843 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 844 | if (SSL_IS_DTLS(s)) |
6392fb8e | 845 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 846 | else |
6392fb8e MC |
847 | *confunc = tls_construct_change_cipher_spec; |
848 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
849 | break; |
850 | ||
851 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
852 | *confunc = tls_construct_client_hello; |
853 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
854 | break; |
855 | ||
ef6c191b MC |
856 | case TLS_ST_CW_END_OF_EARLY_DATA: |
857 | *confunc = tls_construct_end_of_early_data; | |
858 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
859 | break; | |
860 | ||
861 | case TLS_ST_PENDING_EARLY_DATA_END: | |
862 | *confunc = NULL; | |
863 | *mt = SSL3_MT_DUMMY; | |
864 | break; | |
865 | ||
4a01c59f | 866 | case TLS_ST_CW_CERT: |
6392fb8e MC |
867 | *confunc = tls_construct_client_certificate; |
868 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
869 | break; |
870 | ||
871 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
872 | *confunc = tls_construct_client_key_exchange; |
873 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
874 | break; |
875 | ||
876 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 877 | *confunc = tls_construct_cert_verify; |
6392fb8e | 878 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 879 | break; |
61ae935a MC |
880 | |
881 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 882 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
883 | *confunc = tls_construct_next_proto; |
884 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 885 | break; |
61ae935a | 886 | #endif |
4a01c59f | 887 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
888 | *confunc = tls_construct_finished; |
889 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 890 | break; |
9412b3ad MC |
891 | |
892 | case TLS_ST_CW_KEY_UPDATE: | |
893 | *confunc = tls_construct_key_update; | |
894 | *mt = SSL3_MT_KEY_UPDATE; | |
895 | break; | |
4a01c59f | 896 | } |
5923ad4b | 897 | |
5923ad4b | 898 | return 1; |
61ae935a MC |
899 | } |
900 | ||
901 | /* | |
902 | * Returns the maximum allowed length for the current message that we are | |
903 | * reading. Excludes the message header. | |
904 | */ | |
eda75751 | 905 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 906 | { |
d6f1a6e9 | 907 | OSSL_STATEM *st = &s->statem; |
61ae935a | 908 | |
a230b26e | 909 | switch (st->hand_state) { |
f3b3d7f0 RS |
910 | default: |
911 | /* Shouldn't happen */ | |
912 | return 0; | |
913 | ||
a230b26e EK |
914 | case TLS_ST_CR_SRVR_HELLO: |
915 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 916 | |
a230b26e EK |
917 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
918 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 919 | |
a230b26e EK |
920 | case TLS_ST_CR_CERT: |
921 | return s->max_cert_list; | |
61ae935a | 922 | |
2c5dfdc3 MC |
923 | case TLS_ST_CR_CERT_VRFY: |
924 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
925 | ||
a230b26e EK |
926 | case TLS_ST_CR_CERT_STATUS: |
927 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 928 | |
a230b26e EK |
929 | case TLS_ST_CR_KEY_EXCH: |
930 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 931 | |
a230b26e EK |
932 | case TLS_ST_CR_CERT_REQ: |
933 | /* | |
934 | * Set to s->max_cert_list for compatibility with previous releases. In | |
935 | * practice these messages can get quite long if servers are configured | |
936 | * to provide a long list of acceptable CAs | |
937 | */ | |
938 | return s->max_cert_list; | |
61ae935a | 939 | |
a230b26e EK |
940 | case TLS_ST_CR_SRVR_DONE: |
941 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 942 | |
a230b26e EK |
943 | case TLS_ST_CR_CHANGE: |
944 | if (s->version == DTLS1_BAD_VER) | |
945 | return 3; | |
946 | return CCS_MAX_LENGTH; | |
61ae935a | 947 | |
a230b26e EK |
948 | case TLS_ST_CR_SESSION_TICKET: |
949 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 950 | |
a230b26e EK |
951 | case TLS_ST_CR_FINISHED: |
952 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
953 | |
954 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
955 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
956 | |
957 | case TLS_ST_CR_KEY_UPDATE: | |
958 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 959 | } |
61ae935a MC |
960 | } |
961 | ||
962 | /* | |
963 | * Process a message that the client has been received from the server. | |
964 | */ | |
8481f583 | 965 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 966 | { |
d6f1a6e9 | 967 | OSSL_STATEM *st = &s->statem; |
61ae935a | 968 | |
a230b26e | 969 | switch (st->hand_state) { |
f3b3d7f0 RS |
970 | default: |
971 | /* Shouldn't happen */ | |
a2c2e000 MC |
972 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
973 | SSL_F_OSSL_STATEM_CLIENT_PROCESS_MESSAGE, | |
974 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
975 | return MSG_PROCESS_ERROR; |
976 | ||
a230b26e EK |
977 | case TLS_ST_CR_SRVR_HELLO: |
978 | return tls_process_server_hello(s, pkt); | |
61ae935a | 979 | |
a230b26e EK |
980 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
981 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 982 | |
a230b26e EK |
983 | case TLS_ST_CR_CERT: |
984 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 985 | |
2c5dfdc3 MC |
986 | case TLS_ST_CR_CERT_VRFY: |
987 | return tls_process_cert_verify(s, pkt); | |
988 | ||
a230b26e EK |
989 | case TLS_ST_CR_CERT_STATUS: |
990 | return tls_process_cert_status(s, pkt); | |
61ae935a | 991 | |
a230b26e EK |
992 | case TLS_ST_CR_KEY_EXCH: |
993 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 994 | |
a230b26e EK |
995 | case TLS_ST_CR_CERT_REQ: |
996 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 997 | |
a230b26e EK |
998 | case TLS_ST_CR_SRVR_DONE: |
999 | return tls_process_server_done(s, pkt); | |
61ae935a | 1000 | |
a230b26e EK |
1001 | case TLS_ST_CR_CHANGE: |
1002 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1003 | |
a230b26e EK |
1004 | case TLS_ST_CR_SESSION_TICKET: |
1005 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1006 | |
a230b26e EK |
1007 | case TLS_ST_CR_FINISHED: |
1008 | return tls_process_finished(s, pkt); | |
e46f2334 | 1009 | |
c7f47786 MC |
1010 | case TLS_ST_CR_HELLO_REQ: |
1011 | return tls_process_hello_req(s, pkt); | |
1012 | ||
e46f2334 MC |
1013 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1014 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1015 | |
1016 | case TLS_ST_CR_KEY_UPDATE: | |
1017 | return tls_process_key_update(s, pkt); | |
61ae935a | 1018 | } |
61ae935a MC |
1019 | } |
1020 | ||
1021 | /* | |
1022 | * Perform any further processing required following the receipt of a message | |
1023 | * from the server | |
1024 | */ | |
8481f583 | 1025 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1026 | { |
d6f1a6e9 | 1027 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1028 | |
a230b26e | 1029 | switch (st->hand_state) { |
f3b3d7f0 RS |
1030 | default: |
1031 | /* Shouldn't happen */ | |
a2c2e000 MC |
1032 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1033 | SSL_F_OSSL_STATEM_CLIENT_POST_PROCESS_MESSAGE, | |
1034 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1035 | return WORK_ERROR; |
1036 | ||
05c4f1d5 MC |
1037 | case TLS_ST_CR_CERT_REQ: |
1038 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1039 | } |
61ae935a MC |
1040 | } |
1041 | ||
7cea05dc | 1042 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1043 | { |
2c7b4dbc | 1044 | unsigned char *p; |
ec60ccc1 MC |
1045 | size_t sess_id_len; |
1046 | int i, protverr; | |
09b6c2ef | 1047 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1048 | SSL_COMP *comp; |
1049 | #endif | |
b9908bf9 | 1050 | SSL_SESSION *sess = s->session; |
a5816a5a | 1051 | unsigned char *session_id; |
0f113f3e | 1052 | |
7cea05dc | 1053 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc | 1054 | /* Should not happen */ |
f63a17d6 MC |
1055 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1056 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1057 | return 0; |
2c7b4dbc | 1058 | } |
0f113f3e | 1059 | |
b9908bf9 | 1060 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1061 | protverr = ssl_set_client_hello_version(s); |
1062 | if (protverr != 0) { | |
f63a17d6 MC |
1063 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1064 | protverr); | |
7cea05dc | 1065 | return 0; |
4fa52141 | 1066 | } |
0f113f3e | 1067 | |
e586eac8 MC |
1068 | if (sess == NULL |
1069 | || !ssl_version_supported(s, sess->ssl_version) | |
1070 | || !SSL_SESSION_is_resumable(sess)) { | |
fc7129dc MC |
1071 | if (s->hello_retry_request == SSL_HRR_NONE |
1072 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1073 | /* SSLfatal() already called */ |
7cea05dc | 1074 | return 0; |
f63a17d6 | 1075 | } |
b9908bf9 MC |
1076 | } |
1077 | /* else use the pre-loaded session */ | |
0f113f3e | 1078 | |
b9908bf9 | 1079 | p = s->s3->client_random; |
0f113f3e | 1080 | |
b9908bf9 MC |
1081 | /* |
1082 | * for DTLS if client_random is initialized, reuse it, we are | |
1083 | * required to use same upon reply to HelloVerify | |
1084 | */ | |
1085 | if (SSL_IS_DTLS(s)) { | |
1086 | size_t idx; | |
1087 | i = 1; | |
1088 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1089 | if (p[idx]) { | |
1090 | i = 0; | |
1091 | break; | |
0f113f3e | 1092 | } |
0f113f3e | 1093 | } |
751b26b1 | 1094 | } else { |
fc7129dc | 1095 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1096 | } |
0f113f3e | 1097 | |
f7f2a01d | 1098 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
f63a17d6 MC |
1099 | DOWNGRADE_NONE) <= 0) { |
1100 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1101 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1102 | return 0; |
f63a17d6 | 1103 | } |
b9908bf9 | 1104 | |
b9908bf9 MC |
1105 | /*- |
1106 | * version indicates the negotiated version: for example from | |
1107 | * an SSLv2/v3 compatible client hello). The client_version | |
1108 | * field is the maximum version we permit and it is also | |
1109 | * used in RSA encrypted premaster secrets. Some servers can | |
1110 | * choke if we initially report a higher version then | |
1111 | * renegotiate to a lower one in the premaster secret. This | |
1112 | * didn't happen with TLS 1.0 as most servers supported it | |
1113 | * but it can with TLS 1.1 or later if the server only supports | |
1114 | * 1.0. | |
1115 | * | |
1116 | * Possible scenario with previous logic: | |
1117 | * 1. Client hello indicates TLS 1.2 | |
1118 | * 2. Server hello says TLS 1.0 | |
1119 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1120 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1121 | * 5. Server sends hello request to renegotiate. |
1122 | * 6. Client hello indicates TLS v1.0 as we now | |
1123 | * know that is maximum server supports. | |
1124 | * 7. Server chokes on RSA encrypted premaster secret | |
1125 | * containing version 1.0. | |
1126 | * | |
1127 | * For interoperability it should be OK to always use the | |
1128 | * maximum version we support in client hello and then rely | |
1129 | * on the checking of version to ensure the servers isn't | |
1130 | * being inconsistent: for example initially negotiating with | |
1131 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1132 | * client_version in client hello and not resetting it to | |
1133 | * the negotiated version. | |
cd998837 MC |
1134 | * |
1135 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1136 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1137 | */ |
7acb8b64 | 1138 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1139 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
1140 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1141 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1142 | return 0; |
2c7b4dbc | 1143 | } |
b9908bf9 MC |
1144 | |
1145 | /* Session ID */ | |
a5816a5a MC |
1146 | session_id = s->session->session_id; |
1147 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1148 | if (s->version == TLS1_3_VERSION | |
1149 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1150 | sess_id_len = sizeof(s->tmp_session_id); | |
1151 | s->tmp_session_id_len = sess_id_len; | |
1152 | session_id = s->tmp_session_id; | |
fc7129dc | 1153 | if (s->hello_retry_request == SSL_HRR_NONE |
a5816a5a MC |
1154 | && ssl_randbytes(s, s->tmp_session_id, |
1155 | sess_id_len) <= 0) { | |
1156 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1157 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1158 | ERR_R_INTERNAL_ERROR); | |
1159 | return 0; | |
1160 | } | |
1161 | } else { | |
1162 | sess_id_len = 0; | |
1163 | } | |
1164 | } else { | |
ec60ccc1 | 1165 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1166 | if (s->version == TLS1_3_VERSION) { |
1167 | s->tmp_session_id_len = sess_id_len; | |
1168 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1169 | } | |
1170 | } | |
ec60ccc1 | 1171 | if (sess_id_len > sizeof(s->session->session_id) |
7cea05dc | 1172 | || !WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1173 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1174 | sess_id_len)) |
7cea05dc | 1175 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1176 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1177 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1178 | return 0; |
b9908bf9 | 1179 | } |
0f113f3e | 1180 | |
b9908bf9 MC |
1181 | /* cookie stuff for DTLS */ |
1182 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1183 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1184 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1185 | s->d1->cookie_len)) { |
f63a17d6 MC |
1186 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1187 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1188 | return 0; |
0f113f3e | 1189 | } |
b9908bf9 MC |
1190 | } |
1191 | ||
1192 | /* Ciphers supported */ | |
7cea05dc | 1193 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1194 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1195 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1196 | return 0; |
2c7b4dbc | 1197 | } |
635c8f77 | 1198 | |
f63a17d6 MC |
1199 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1200 | /* SSLfatal() already called */ | |
7cea05dc | 1201 | return 0; |
f63a17d6 | 1202 | } |
7cea05dc | 1203 | if (!WPACKET_close(pkt)) { |
f63a17d6 MC |
1204 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1205 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1206 | return 0; |
b9908bf9 | 1207 | } |
0f113f3e | 1208 | |
b9908bf9 | 1209 | /* COMPRESSION */ |
7cea05dc | 1210 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
f63a17d6 MC |
1211 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1212 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1213 | return 0; |
2c7b4dbc MC |
1214 | } |
1215 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1216 | if (ssl_allow_compression(s) |
1217 | && s->ctx->comp_methods | |
1218 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1219 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1220 | for (i = 0; i < compnum; i++) { | |
1221 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1222 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
f63a17d6 MC |
1223 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1224 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1225 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1226 | return 0; |
2c7b4dbc MC |
1227 | } |
1228 | } | |
b9908bf9 | 1229 | } |
09b6c2ef | 1230 | #endif |
2c7b4dbc | 1231 | /* Add the NULL method */ |
7cea05dc | 1232 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1233 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1234 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1235 | return 0; |
2c7b4dbc | 1236 | } |
761772d7 | 1237 | |
b9908bf9 | 1238 | /* TLS extensions */ |
f63a17d6 MC |
1239 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1240 | /* SSLfatal() already called */ | |
7cea05dc | 1241 | return 0; |
b9908bf9 | 1242 | } |
0f113f3e | 1243 | |
b9908bf9 | 1244 | return 1; |
0f113f3e | 1245 | } |
d02b48c6 | 1246 | |
be3583fa | 1247 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1248 | { |
cb150cbc | 1249 | size_t cookie_len; |
8ba708e5 MC |
1250 | PACKET cookiepkt; |
1251 | ||
1252 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1253 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
f63a17d6 MC |
1254 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1255 | SSL_R_LENGTH_MISMATCH); | |
1256 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1257 | } |
1258 | ||
1259 | cookie_len = PACKET_remaining(&cookiepkt); | |
1260 | if (cookie_len > sizeof(s->d1->cookie)) { | |
f63a17d6 MC |
1261 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1262 | SSL_R_LENGTH_TOO_LONG); | |
1263 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1264 | } |
1265 | ||
1266 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
f63a17d6 MC |
1267 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1268 | SSL_R_LENGTH_MISMATCH); | |
1269 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1270 | } |
1271 | s->d1->cookie_len = cookie_len; | |
1272 | ||
1273 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1274 | } |
1275 | ||
11c67eea | 1276 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1277 | { |
1278 | STACK_OF(SSL_CIPHER) *sk; | |
1279 | const SSL_CIPHER *c; | |
11c67eea MC |
1280 | int i; |
1281 | ||
1282 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1283 | if (c == NULL) { | |
1284 | /* unknown cipher */ | |
f63a17d6 MC |
1285 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1286 | SSL_R_UNKNOWN_CIPHER_RETURNED); | |
11c67eea MC |
1287 | return 0; |
1288 | } | |
1289 | /* | |
1290 | * If it is a disabled cipher we either didn't send it in client hello, | |
1291 | * or it's not allowed for the selected protocol. So we return an error. | |
1292 | */ | |
8af91fd9 | 1293 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
f63a17d6 MC |
1294 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1295 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1296 | return 0; |
1297 | } | |
1298 | ||
1299 | sk = ssl_get_ciphers_by_id(s); | |
1300 | i = sk_SSL_CIPHER_find(sk, c); | |
1301 | if (i < 0) { | |
1302 | /* we did not say we would use this cipher */ | |
f63a17d6 MC |
1303 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1304 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1305 | return 0; |
1306 | } | |
1307 | ||
1308 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1309 | && s->s3->tmp.new_cipher->id != c->id) { | |
1310 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
f63a17d6 MC |
1311 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1312 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1313 | return 0; |
1314 | } | |
1315 | ||
1316 | /* | |
1317 | * Depending on the session caching (internal/external), the cipher | |
1318 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1319 | * set and use it for comparison. | |
1320 | */ | |
1321 | if (s->session->cipher != NULL) | |
1322 | s->session->cipher_id = s->session->cipher->id; | |
1323 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1324 | if (SSL_IS_TLS13(s)) { |
1325 | /* | |
1326 | * In TLSv1.3 it is valid for the server to select a different | |
1327 | * ciphersuite as long as the hash is the same. | |
1328 | */ | |
1329 | if (ssl_md(c->algorithm2) | |
1330 | != ssl_md(s->session->cipher->algorithm2)) { | |
f63a17d6 MC |
1331 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1332 | SSL_F_SET_CLIENT_CIPHERSUITE, | |
1333 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
a055a881 MC |
1334 | return 0; |
1335 | } | |
1336 | } else { | |
1337 | /* | |
1338 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1339 | * ciphersuite. | |
1340 | */ | |
f63a17d6 MC |
1341 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1342 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
a055a881 MC |
1343 | return 0; |
1344 | } | |
11c67eea MC |
1345 | } |
1346 | s->s3->tmp.new_cipher = c; | |
1347 | ||
1348 | return 1; | |
1349 | } | |
1350 | ||
1351 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1352 | { | |
332eb390 | 1353 | PACKET session_id, extpkt; |
b9908bf9 | 1354 | size_t session_id_len; |
b6981744 | 1355 | const unsigned char *cipherchars; |
597c51bc | 1356 | int hrr = 0; |
b9908bf9 | 1357 | unsigned int compression; |
4fa52141 | 1358 | unsigned int sversion; |
3434f40b | 1359 | unsigned int context; |
29bfd5b7 | 1360 | int discard; |
332eb390 | 1361 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1362 | #ifndef OPENSSL_NO_COMP |
1363 | SSL_COMP *comp; | |
1364 | #endif | |
1365 | ||
4fa52141 | 1366 | if (!PACKET_get_net_2(pkt, &sversion)) { |
f63a17d6 MC |
1367 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1368 | SSL_R_LENGTH_MISMATCH); | |
1369 | goto err; | |
4fa52141 | 1370 | } |
50932c4a | 1371 | |
c3043dcd | 1372 | /* load the server random */ |
597c51bc MC |
1373 | if (s->version == TLS1_3_VERSION |
1374 | && sversion == TLS1_2_VERSION | |
1375 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1376 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
fc7129dc MC |
1377 | s->hello_retry_request = SSL_HRR_PENDING; |
1378 | hrr = 1; | |
597c51bc MC |
1379 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
1380 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1381 | SSL_R_LENGTH_MISMATCH); | |
1382 | goto err; | |
1383 | } | |
1384 | } else { | |
1385 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
1386 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1387 | SSL_R_LENGTH_MISMATCH); | |
1388 | goto err; | |
1389 | } | |
c3043dcd MC |
1390 | } |
1391 | ||
88050dd1 MC |
1392 | /* Get the session-id. */ |
1393 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1394 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1395 | SSL_R_LENGTH_MISMATCH); | |
f63a17d6 | 1396 | goto err; |
0f113f3e | 1397 | } |
88050dd1 MC |
1398 | session_id_len = PACKET_remaining(&session_id); |
1399 | if (session_id_len > sizeof(s->session->session_id) | |
1400 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1401 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1402 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
f63a17d6 | 1403 | goto err; |
524420d8 MC |
1404 | } |
1405 | ||
73999b62 | 1406 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1407 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1408 | SSL_R_LENGTH_MISMATCH); | |
1409 | goto err; | |
fc5ce51d EK |
1410 | } |
1411 | ||
88050dd1 MC |
1412 | if (!PACKET_get_1(pkt, &compression)) { |
1413 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1414 | SSL_R_LENGTH_MISMATCH); | |
1415 | goto err; | |
4ff65f77 MC |
1416 | } |
1417 | ||
1418 | /* TLS extensions */ | |
597c51bc | 1419 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1420 | PACKET_null_init(&extpkt); |
26b9172a MC |
1421 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1422 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1423 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1424 | SSL_R_BAD_LENGTH); | |
1425 | goto err; | |
4ff65f77 MC |
1426 | } |
1427 | ||
597c51bc MC |
1428 | if (!hrr) { |
1429 | if (!tls_collect_extensions(s, &extpkt, | |
1430 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1431 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1432 | &extensions, NULL, 1)) { | |
1433 | /* SSLfatal() already called */ | |
1434 | goto err; | |
1435 | } | |
1436 | ||
1437 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1438 | /* SSLfatal() already called */ | |
1439 | goto err; | |
1440 | } | |
88050dd1 MC |
1441 | } |
1442 | ||
597c51bc MC |
1443 | if (SSL_IS_TLS13(s) || hrr) { |
1444 | if (compression != 0) { | |
1445 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1446 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1447 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1448 | goto err; | |
1449 | } | |
1450 | ||
1451 | if (session_id_len != s->tmp_session_id_len | |
1452 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1453 | session_id_len) != 0) { | |
1454 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1455 | SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INVALID_SESSION_ID); | |
1456 | goto err; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | if (hrr) { | |
1461 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1462 | /* SSLfatal() already called */ | |
1463 | goto err; | |
1464 | } | |
1465 | ||
1466 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1467 | } |
1468 | ||
1469 | /* | |
1470 | * Now we have chosen the version we need to check again that the extensions | |
1471 | * are appropriate for this version. | |
1472 | */ | |
fe874d27 MC |
1473 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1474 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 MC |
1475 | if (!tls_validate_all_contexts(s, context, extensions)) { |
1476 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1477 | SSL_R_BAD_EXTENSION); | |
1478 | goto err; | |
1479 | } | |
1480 | ||
4ff65f77 MC |
1481 | s->hit = 0; |
1482 | ||
1483 | if (SSL_IS_TLS13(s)) { | |
a5816a5a MC |
1484 | /* |
1485 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1486 | * the message must be on a record boundary. | |
1487 | */ | |
1488 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1489 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
1490 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1491 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1492 | goto err; | |
1493 | } | |
1494 | ||
4ff65f77 MC |
1495 | /* This will set s->hit if we are resuming */ |
1496 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1497 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1498 | extensions, NULL, 0)) { |
f63a17d6 MC |
1499 | /* SSLfatal() already called */ |
1500 | goto err; | |
1501 | } | |
4ff65f77 | 1502 | } else { |
8c1a5343 | 1503 | /* |
4ff65f77 MC |
1504 | * Check if we can resume the session based on external pre-shared |
1505 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1506 | * Resumption based on server-side state works with session IDs. | |
1507 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1508 | * works by overriding the SessionTicket extension at the application | |
1509 | * layer, and does not send a session ID. (We do not know whether | |
1510 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1511 | * ID alone is not a reliable indicator of session resumption, so we | |
1512 | * first check if we can resume, and later peek at the next handshake | |
1513 | * message to see if the server wants to resume. | |
8c1a5343 | 1514 | */ |
4ff65f77 MC |
1515 | if (s->version >= TLS1_VERSION |
1516 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1517 | const SSL_CIPHER *pref_cipher = NULL; | |
1518 | /* | |
1519 | * s->session->master_key_length is a size_t, but this is an int for | |
1520 | * backwards compat reasons | |
1521 | */ | |
1522 | int master_key_length; | |
1523 | master_key_length = sizeof(s->session->master_key); | |
1524 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1525 | &master_key_length, | |
1526 | NULL, &pref_cipher, | |
1527 | s->ext.session_secret_cb_arg) | |
1528 | && master_key_length > 0) { | |
1529 | s->session->master_key_length = master_key_length; | |
1530 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1531 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1532 | } else { |
f63a17d6 MC |
1533 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1534 | SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1535 | goto err; | |
4ff65f77 | 1536 | } |
0f113f3e | 1537 | } |
4ff65f77 MC |
1538 | |
1539 | if (session_id_len != 0 | |
1540 | && session_id_len == s->session->session_id_length | |
1541 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1542 | session_id_len) == 0) | |
1543 | s->hit = 1; | |
50932c4a MC |
1544 | } |
1545 | ||
4ff65f77 | 1546 | if (s->hit) { |
0f113f3e | 1547 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1548 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1549 | /* actually a client application bug */ |
f63a17d6 MC |
1550 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1551 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1552 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1553 | goto err; | |
0f113f3e | 1554 | } |
6e3d0153 | 1555 | } else { |
0f113f3e | 1556 | /* |
6e3d0153 | 1557 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1558 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1559 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1560 | * so the PAC-based session secret is always preserved. It'll be | |
1561 | * overwritten if the server refuses resumption. | |
0f113f3e | 1562 | */ |
4ff65f77 MC |
1563 | if (s->session->session_id_length > 0 |
1564 | || (SSL_IS_TLS13(s) | |
1565 | && s->session->ext.tick_identity | |
1566 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
0e6161bc BK |
1567 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_miss, 1, &discard, |
1568 | s->session_ctx->lock); | |
0f113f3e | 1569 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1570 | /* SSLfatal() already called */ |
1571 | goto err; | |
0f113f3e MC |
1572 | } |
1573 | } | |
50932c4a | 1574 | |
ccae4a15 | 1575 | s->session->ssl_version = s->version; |
a5816a5a MC |
1576 | /* |
1577 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1578 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1579 | * echo of what we originally sent in the ClientHello and should not be | |
1580 | * used for resumption. | |
1581 | */ | |
1582 | if (!SSL_IS_TLS13(s)) { | |
1583 | s->session->session_id_length = session_id_len; | |
1584 | /* session_id_len could be 0 */ | |
1585 | if (session_id_len > 0) | |
1586 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1587 | session_id_len); | |
1588 | } | |
0f113f3e | 1589 | } |
fc5ce51d | 1590 | |
ccae4a15 FI |
1591 | /* Session version and negotiated protocol version should match */ |
1592 | if (s->version != s->session->ssl_version) { | |
f63a17d6 MC |
1593 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1594 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1595 | goto err; | |
ccae4a15 | 1596 | } |
0f113f3e | 1597 | /* |
3eb2aff4 KR |
1598 | * Now that we know the version, update the check to see if it's an allowed |
1599 | * version. | |
1600 | */ | |
1601 | s->s3->tmp.min_ver = s->version; | |
1602 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1603 | |
11c67eea | 1604 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1605 | /* SSLfatal() already called */ |
1606 | goto err; | |
0f113f3e MC |
1607 | } |
1608 | ||
09b6c2ef | 1609 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1610 | if (compression != 0) { |
f63a17d6 MC |
1611 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1612 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1613 | goto err; | |
0f113f3e MC |
1614 | } |
1615 | /* | |
1616 | * If compression is disabled we'd better not try to resume a session | |
1617 | * using compression. | |
1618 | */ | |
1619 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
1620 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1621 | SSL_R_INCONSISTENT_COMPRESSION); | |
1622 | goto err; | |
0f113f3e | 1623 | } |
09b6c2ef | 1624 | #else |
fc5ce51d | 1625 | if (s->hit && compression != s->session->compress_meth) { |
f63a17d6 | 1626 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
dd5a4279 | 1627 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1628 | goto err; |
0f113f3e | 1629 | } |
fc5ce51d | 1630 | if (compression == 0) |
0f113f3e MC |
1631 | comp = NULL; |
1632 | else if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1633 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1634 | SSL_R_COMPRESSION_DISABLED); | |
1635 | goto err; | |
fc5ce51d EK |
1636 | } else { |
1637 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1638 | } | |
0f113f3e | 1639 | |
fc5ce51d | 1640 | if (compression != 0 && comp == NULL) { |
f63a17d6 MC |
1641 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1642 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1643 | goto err; | |
0f113f3e MC |
1644 | } else { |
1645 | s->s3->tmp.new_compression = comp; | |
1646 | } | |
09b6c2ef | 1647 | #endif |
761772d7 | 1648 | |
f63a17d6 MC |
1649 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1650 | /* SSLfatal() already called */ | |
1651 | goto err; | |
1652 | } | |
332eb390 | 1653 | |
8723588e MC |
1654 | #ifndef OPENSSL_NO_SCTP |
1655 | if (SSL_IS_DTLS(s) && s->hit) { | |
1656 | unsigned char sctpauthkey[64]; | |
1657 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1658 | ||
1659 | /* | |
1660 | * Add new shared key for SCTP-Auth, will be ignored if | |
1661 | * no SCTP used. | |
1662 | */ | |
141eb8c6 MC |
1663 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1664 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1665 | |
1666 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1667 | sizeof(sctpauthkey), |
1668 | labelbuffer, | |
f63a17d6 MC |
1669 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
1670 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1671 | ERR_R_INTERNAL_ERROR); | |
1672 | goto err; | |
1673 | } | |
8723588e MC |
1674 | |
1675 | BIO_ctrl(SSL_get_wbio(s), | |
1676 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1677 | sizeof(sctpauthkey), sctpauthkey); | |
1678 | } | |
1679 | #endif | |
1680 | ||
92760c21 MC |
1681 | /* |
1682 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1683 | * we're done with this message | |
1684 | */ | |
1685 | if (SSL_IS_TLS13(s) | |
1686 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1687 | || !s->method->ssl3_enc->change_cipher_state(s, |
1688 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1689 | /* SSLfatal() already called */ |
1690 | goto err; | |
92760c21 MC |
1691 | } |
1692 | ||
1b0286a3 | 1693 | OPENSSL_free(extensions); |
b9908bf9 | 1694 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1695 | err: |
1b0286a3 | 1696 | OPENSSL_free(extensions); |
b9908bf9 | 1697 | return MSG_PROCESS_ERROR; |
0f113f3e | 1698 | } |
d02b48c6 | 1699 | |
597c51bc MC |
1700 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, |
1701 | PACKET *extpkt) | |
3847d426 | 1702 | { |
3847d426 | 1703 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1704 | |
d4504fe5 MC |
1705 | /* |
1706 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1707 | * should not be used. | |
1708 | */ | |
1709 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1710 | s->enc_write_ctx = NULL; | |
1711 | ||
597c51bc | 1712 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1713 | &extensions, NULL, 1) |
fe874d27 | 1714 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1715 | extensions, NULL, 0, 1)) { |
1716 | /* SSLfatal() already called */ | |
1717 | goto err; | |
1718 | } | |
3847d426 MC |
1719 | |
1720 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1721 | extensions = NULL; |
1722 | ||
f5d270ca BK |
1723 | if (s->ext.tls13_cookie_len == 0 |
1724 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
1725 | && s->s3->tmp.pkey != NULL | |
1726 | #endif | |
1727 | ) { | |
66d4bf6b MC |
1728 | /* |
1729 | * We didn't receive a cookie or a new key_share so the next | |
1730 | * ClientHello will not change | |
1731 | */ | |
f63a17d6 | 1732 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
597c51bc MC |
1733 | SSL_F_TLS_PROCESS_AS_HELLO_RETRY_REQUEST, |
1734 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
f63a17d6 | 1735 | goto err; |
66d4bf6b | 1736 | } |
3847d426 | 1737 | |
11c67eea MC |
1738 | /* |
1739 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1740 | * a synthetic message_hash in place of ClientHello1. | |
1741 | */ | |
43054d3d | 1742 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1743 | /* SSLfatal() already called */ |
1744 | goto err; | |
11c67eea MC |
1745 | } |
1746 | ||
1747 | /* | |
1748 | * Add this message to the Transcript Hash. Normally this is done | |
1749 | * automatically prior to the message processing stage. However due to the | |
1750 | * need to create the synthetic message hash, we defer that step until now | |
1751 | * for HRR messages. | |
1752 | */ | |
1753 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1754 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1755 | /* SSLfatal() already called */ |
1756 | goto err; | |
11c67eea MC |
1757 | } |
1758 | ||
3847d426 | 1759 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1760 | err: |
3847d426 MC |
1761 | OPENSSL_free(extensions); |
1762 | return MSG_PROCESS_ERROR; | |
1763 | } | |
1764 | ||
be3583fa | 1765 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1766 | { |
f63a17d6 | 1767 | int i; |
eb5fd03b | 1768 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
b9908bf9 MC |
1769 | unsigned long cert_list_len, cert_len; |
1770 | X509 *x = NULL; | |
b6981744 | 1771 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1772 | STACK_OF(X509) *sk = NULL; |
1773 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1774 | size_t chainidx, certidx; |
e96e0f8e | 1775 | unsigned int context = 0; |
7f6b466b | 1776 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1777 | |
1778 | if ((sk = sk_X509_new_null()) == NULL) { | |
f63a17d6 MC |
1779 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1780 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1781 | goto err; |
0f113f3e MC |
1782 | } |
1783 | ||
e96e0f8e MC |
1784 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1785 | || context != 0 | |
1786 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1787 | || PACKET_remaining(pkt) != cert_list_len |
1788 | || PACKET_remaining(pkt) == 0) { | |
f63a17d6 MC |
1789 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1790 | SSL_R_LENGTH_MISMATCH); | |
1791 | goto err; | |
0f113f3e | 1792 | } |
d805a57b | 1793 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1794 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1795 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
f63a17d6 MC |
1796 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1797 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1798 | SSL_R_CERT_LENGTH_MISMATCH); | |
1799 | goto err; | |
0f113f3e MC |
1800 | } |
1801 | ||
df758a85 MC |
1802 | certstart = certbytes; |
1803 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e | 1804 | if (x == NULL) { |
f63a17d6 MC |
1805 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, |
1806 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1807 | goto err; | |
0f113f3e | 1808 | } |
df758a85 | 1809 | if (certbytes != (certstart + cert_len)) { |
f63a17d6 MC |
1810 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1811 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1812 | SSL_R_CERT_LENGTH_MISMATCH); | |
1813 | goto err; | |
0f113f3e | 1814 | } |
e96e0f8e MC |
1815 | |
1816 | if (SSL_IS_TLS13(s)) { | |
1817 | RAW_EXTENSION *rawexts = NULL; | |
1818 | PACKET extensions; | |
1819 | ||
1820 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
1821 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1822 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1823 | SSL_R_BAD_LENGTH); | |
1824 | goto err; | |
e96e0f8e | 1825 | } |
fe874d27 MC |
1826 | if (!tls_collect_extensions(s, &extensions, |
1827 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1828 | NULL, chainidx == 0) |
8e1634ec | 1829 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1830 | rawexts, x, chainidx, |
8e1634ec | 1831 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1832 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1833 | /* SSLfatal already called */ |
1834 | goto err; | |
5ee289ea MC |
1835 | } |
1836 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1837 | } |
1838 | ||
0f113f3e | 1839 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
1840 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1841 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1842 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1843 | goto err; |
0f113f3e MC |
1844 | } |
1845 | x = NULL; | |
0f113f3e MC |
1846 | } |
1847 | ||
1848 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1849 | /* |
1850 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1851 | * for client side verification of the server certificate to take place. | |
1852 | * However, historically the code has only checked that *any* flag is set | |
1853 | * to cause server verification to take place. Use of the other flags makes | |
1854 | * no sense in client mode. An attempt to clean up the semantics was | |
1855 | * reverted because at least one application *only* set | |
1856 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1857 | * server verification to take place, after the clean up it silently did | |
1858 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1859 | * sent to them because they are void functions. Therefore, we now use the | |
1860 | * (less clean) historic behaviour of performing validation if any flag is | |
1861 | * set. The *documented* interface remains the same. | |
1862 | */ | |
1863 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
f63a17d6 MC |
1864 | SSLfatal(s, ssl_verify_alarm_type(s->verify_result), |
1865 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1866 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1867 | goto err; | |
0f113f3e MC |
1868 | } |
1869 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1870 | if (i > 1) { | |
f63a17d6 MC |
1871 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1872 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); | |
1873 | goto err; | |
0f113f3e MC |
1874 | } |
1875 | ||
c34b0f99 | 1876 | s->session->peer_chain = sk; |
0f113f3e MC |
1877 | /* |
1878 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1879 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1880 | */ |
1881 | x = sk_X509_value(sk, 0); | |
1882 | sk = NULL; | |
0f113f3e | 1883 | |
8382fd3a | 1884 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1885 | |
55a9a16f | 1886 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1887 | x = NULL; |
f63a17d6 MC |
1888 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1889 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1890 | goto err; | |
0f113f3e MC |
1891 | } |
1892 | ||
7f6b466b | 1893 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e | 1894 | x = NULL; |
f63a17d6 MC |
1895 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1896 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1897 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1898 | goto err; | |
0f113f3e | 1899 | } |
05b8486e DSH |
1900 | /* |
1901 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1902 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1903 | * type. | |
1904 | */ | |
1905 | if (!SSL_IS_TLS13(s)) { | |
7f6b466b | 1906 | if ((clu->amask & s->s3->tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e | 1907 | x = NULL; |
f63a17d6 MC |
1908 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1909 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1910 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1911 | goto err; | |
05b8486e | 1912 | } |
0f113f3e | 1913 | } |
7f6b466b | 1914 | s->session->peer_type = certidx; |
55a9a16f MC |
1915 | |
1916 | X509_free(s->session->peer); | |
05f0fb9f | 1917 | X509_up_ref(x); |
55a9a16f | 1918 | s->session->peer = x; |
0f113f3e | 1919 | s->session->verify_result = s->verify_result; |
0f113f3e | 1920 | x = NULL; |
2c5dfdc3 MC |
1921 | |
1922 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1923 | if (SSL_IS_TLS13(s) | |
1924 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1925 | sizeof(s->cert_verify_hash), | |
1926 | &s->cert_verify_hash_len)) { | |
f63a17d6 MC |
1927 | /* SSLfatal() already called */; |
1928 | goto err; | |
2c5dfdc3 MC |
1929 | } |
1930 | ||
b9908bf9 | 1931 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 1932 | |
cc273a93 | 1933 | err: |
0f113f3e MC |
1934 | X509_free(x); |
1935 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1936 | return ret; |
0f113f3e | 1937 | } |
d02b48c6 | 1938 | |
a2c2e000 | 1939 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
1940 | { |
1941 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1942 | PACKET psk_identity_hint; |
02a74590 | 1943 | |
7dc1c647 MC |
1944 | /* PSK ciphersuites are preceded by an identity hint */ |
1945 | ||
1946 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
a2c2e000 MC |
1947 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1948 | SSL_R_LENGTH_MISMATCH); | |
7dc1c647 MC |
1949 | return 0; |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Store PSK identity hint for later use, hint is used in | |
1954 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1955 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1956 | * identity. | |
1957 | */ | |
1958 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
1959 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1960 | SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, | |
1961 | SSL_R_DATA_LENGTH_TOO_LONG); | |
7dc1c647 MC |
1962 | return 0; |
1963 | } | |
02a74590 | 1964 | |
7dc1c647 MC |
1965 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1966 | OPENSSL_free(s->session->psk_identity_hint); | |
1967 | s->session->psk_identity_hint = NULL; | |
1968 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1969 | &s->session->psk_identity_hint)) { |
a2c2e000 MC |
1970 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1971 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 MC |
1972 | return 0; |
1973 | } | |
1974 | ||
1975 | return 1; | |
1976 | #else | |
a2c2e000 MC |
1977 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1978 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 | 1979 | return 0; |
02a74590 MC |
1980 | #endif |
1981 | } | |
1982 | ||
a2c2e000 | 1983 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
1984 | { |
1985 | #ifndef OPENSSL_NO_SRP | |
1986 | PACKET prime, generator, salt, server_pub; | |
1987 | ||
1988 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1989 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1990 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1991 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
a2c2e000 MC |
1992 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
1993 | SSL_R_LENGTH_MISMATCH); | |
25c6c10c MC |
1994 | return 0; |
1995 | } | |
1996 | ||
348240c6 | 1997 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1998 | if ((s->srp_ctx.N = |
1999 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2000 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2001 | || (s->srp_ctx.g = |
2002 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2003 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2004 | || (s->srp_ctx.s = |
2005 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2006 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2007 | || (s->srp_ctx.B = |
2008 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2009 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
a2c2e000 MC |
2010 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2011 | ERR_R_BN_LIB); | |
25c6c10c MC |
2012 | return 0; |
2013 | } | |
2014 | ||
a2c2e000 MC |
2015 | if (!srp_verify_server_param(s)) { |
2016 | /* SSLfatal() already called */ | |
25c6c10c MC |
2017 | return 0; |
2018 | } | |
2019 | ||
2020 | /* We must check if there is a certificate */ | |
a230b26e | 2021 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2022 | *pkey = X509_get0_pubkey(s->session->peer); |
2023 | ||
2024 | return 1; | |
2025 | #else | |
a2c2e000 MC |
2026 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2027 | ERR_R_INTERNAL_ERROR); | |
25c6c10c MC |
2028 | return 0; |
2029 | #endif | |
2030 | } | |
2031 | ||
a2c2e000 | 2032 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d MC |
2033 | { |
2034 | #ifndef OPENSSL_NO_DH | |
2035 | PACKET prime, generator, pub_key; | |
2036 | EVP_PKEY *peer_tmp = NULL; | |
2037 | ||
2038 | DH *dh = NULL; | |
2039 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
2040 | ||
26505153 RL |
2041 | int check_bits = 0; |
2042 | ||
e01a610d MC |
2043 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2044 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2045 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
a2c2e000 MC |
2046 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2047 | SSL_R_LENGTH_MISMATCH); | |
e01a610d MC |
2048 | return 0; |
2049 | } | |
2050 | ||
2051 | peer_tmp = EVP_PKEY_new(); | |
2052 | dh = DH_new(); | |
2053 | ||
2054 | if (peer_tmp == NULL || dh == NULL) { | |
a2c2e000 MC |
2055 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2056 | ERR_R_MALLOC_FAILURE); | |
e01a610d MC |
2057 | goto err; |
2058 | } | |
2059 | ||
348240c6 MC |
2060 | /* TODO(size_t): Convert these calls */ |
2061 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2062 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2063 | NULL); | |
2064 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2065 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2066 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
a2c2e000 MC |
2067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2068 | ERR_R_BN_LIB); | |
e01a610d MC |
2069 | goto err; |
2070 | } | |
2071 | ||
69687aa8 | 2072 | /* test non-zero pubkey */ |
26505153 | 2073 | if (BN_is_zero(bnpub_key)) { |
a2c2e000 MC |
2074 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2075 | SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2076 | goto err; |
2077 | } | |
2078 | ||
2079 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
a2c2e000 MC |
2080 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2081 | ERR_R_BN_LIB); | |
e01a610d MC |
2082 | goto err; |
2083 | } | |
2084 | p = g = NULL; | |
2085 | ||
26505153 | 2086 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
a2c2e000 MC |
2087 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2088 | SSL_R_BAD_DH_VALUE); | |
26505153 RL |
2089 | goto err; |
2090 | } | |
2091 | ||
e01a610d | 2092 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
a2c2e000 MC |
2093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2094 | ERR_R_BN_LIB); | |
e01a610d MC |
2095 | goto err; |
2096 | } | |
2097 | bnpub_key = NULL; | |
2098 | ||
2099 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
a2c2e000 MC |
2100 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SKE_DHE, |
2101 | SSL_R_DH_KEY_TOO_SMALL); | |
e01a610d MC |
2102 | goto err; |
2103 | } | |
2104 | ||
2105 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
a2c2e000 MC |
2106 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2107 | ERR_R_EVP_LIB); | |
e01a610d MC |
2108 | goto err; |
2109 | } | |
2110 | ||
2111 | s->s3->peer_tmp = peer_tmp; | |
2112 | ||
2113 | /* | |
2114 | * FIXME: This makes assumptions about which ciphersuites come with | |
2115 | * public keys. We should have a less ad-hoc way of doing this | |
2116 | */ | |
a230b26e | 2117 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2118 | *pkey = X509_get0_pubkey(s->session->peer); |
2119 | /* else anonymous DH, so no certificate or pkey. */ | |
2120 | ||
2121 | return 1; | |
2122 | ||
2123 | err: | |
2124 | BN_free(p); | |
2125 | BN_free(g); | |
2126 | BN_free(bnpub_key); | |
2127 | DH_free(dh); | |
2128 | EVP_PKEY_free(peer_tmp); | |
2129 | ||
2130 | return 0; | |
2131 | #else | |
a2c2e000 MC |
2132 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2133 | ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2134 | return 0; |
2135 | #endif | |
2136 | } | |
2137 | ||
a2c2e000 | 2138 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 MC |
2139 | { |
2140 | #ifndef OPENSSL_NO_EC | |
2141 | PACKET encoded_pt; | |
6447e818 | 2142 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2143 | |
2144 | /* | |
2145 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2146 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2147 | * ECParameters in this case is just three bytes. |
2148 | */ | |
6447e818 | 2149 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
a2c2e000 MC |
2150 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2151 | SSL_R_LENGTH_TOO_SHORT); | |
ff74aeb1 MC |
2152 | return 0; |
2153 | } | |
2154 | /* | |
6447e818 DSH |
2155 | * Check curve is named curve type and one of our preferences, if not |
2156 | * server has sent an invalid curve. | |
ff74aeb1 | 2157 | */ |
6447e818 | 2158 | if (curve_type != NAMED_CURVE_TYPE || !tls1_check_group_id(s, curve_id)) { |
a2c2e000 MC |
2159 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2160 | SSL_R_WRONG_CURVE); | |
ff74aeb1 MC |
2161 | return 0; |
2162 | } | |
2163 | ||
6447e818 | 2164 | if ((s->s3->peer_tmp = ssl_generate_param_group(curve_id)) == NULL) { |
a2c2e000 MC |
2165 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2166 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
ff74aeb1 MC |
2167 | return 0; |
2168 | } | |
2169 | ||
ff74aeb1 | 2170 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
a2c2e000 MC |
2171 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2172 | SSL_R_LENGTH_MISMATCH); | |
ff74aeb1 MC |
2173 | return 0; |
2174 | } | |
2175 | ||
ec24630a DSH |
2176 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2177 | PACKET_data(&encoded_pt), | |
2178 | PACKET_remaining(&encoded_pt))) { | |
a2c2e000 MC |
2179 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2180 | SSL_R_BAD_ECPOINT); | |
ff74aeb1 MC |
2181 | return 0; |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2186 | * ECParameters in the server key exchange message. We do support RSA | |
2187 | * and ECDSA. | |
2188 | */ | |
2189 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2190 | *pkey = X509_get0_pubkey(s->session->peer); | |
2191 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2192 | *pkey = X509_get0_pubkey(s->session->peer); | |
2193 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2194 | ||
2195 | return 1; | |
2196 | #else | |
a2c2e000 MC |
2197 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2198 | ERR_R_INTERNAL_ERROR); | |
ff74aeb1 MC |
2199 | return 0; |
2200 | #endif | |
2201 | } | |
2202 | ||
be3583fa | 2203 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2204 | { |
e1e588ac | 2205 | long alg_k; |
b9908bf9 | 2206 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2207 | EVP_MD_CTX *md_ctx = NULL; |
2208 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2209 | PACKET save_param_start, signature; |
b9908bf9 | 2210 | |
b9908bf9 MC |
2211 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2212 | ||
73999b62 | 2213 | save_param_start = *pkt; |
8d92c1f8 | 2214 | |
3260adf1 | 2215 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2216 | EVP_PKEY_free(s->s3->peer_tmp); |
2217 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2218 | #endif |
d02b48c6 | 2219 | |
7689082b | 2220 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2221 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2222 | /* SSLfatal() already called */ | |
7dc1c647 | 2223 | goto err; |
a2c2e000 | 2224 | } |
7689082b DSH |
2225 | } |
2226 | ||
2227 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2228 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2229 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2230 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2231 | /* SSLfatal() already called */ | |
0f113f3e | 2232 | goto err; |
a2c2e000 | 2233 | } |
e01a610d | 2234 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2235 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2236 | /* SSLfatal() already called */ | |
e01a610d | 2237 | goto err; |
a2c2e000 | 2238 | } |
ff74aeb1 | 2239 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2240 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2241 | /* SSLfatal() already called */ | |
ff74aeb1 | 2242 | goto err; |
a2c2e000 | 2243 | } |
0f113f3e | 2244 | } else if (alg_k) { |
a2c2e000 MC |
2245 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2246 | SSL_R_UNEXPECTED_MESSAGE); | |
e1e588ac | 2247 | goto err; |
0f113f3e | 2248 | } |
0f113f3e | 2249 | |
0f113f3e MC |
2250 | /* if it was signed, check the signature */ |
2251 | if (pkey != NULL) { | |
32942870 | 2252 | PACKET params; |
be8dba2c MC |
2253 | int maxsig; |
2254 | const EVP_MD *md = NULL; | |
72ceb6a6 DSH |
2255 | unsigned char *tbs; |
2256 | size_t tbslen; | |
2257 | int rv; | |
e1e588ac | 2258 | |
32942870 EK |
2259 | /* |
2260 | * |pkt| now points to the beginning of the signature, so the difference | |
2261 | * equals the length of the parameters. | |
2262 | */ | |
2263 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2264 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2265 | PACKET_remaining(pkt))) { |
a2c2e000 MC |
2266 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2267 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2268 | goto err; |
32942870 EK |
2269 | } |
2270 | ||
0f113f3e | 2271 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2272 | unsigned int sigalg; |
703bcee0 MC |
2273 | |
2274 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
a2c2e000 MC |
2275 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2276 | SSL_R_LENGTH_TOO_SHORT); | |
e1e588ac | 2277 | goto err; |
0f113f3e | 2278 | } |
f63a17d6 MC |
2279 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2280 | /* SSLfatal() already called */ | |
0f113f3e | 2281 | goto err; |
0f113f3e | 2282 | } |
f365a3e2 | 2283 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
a2c2e000 MC |
2284 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2285 | ERR_R_INTERNAL_ERROR); | |
f365a3e2 | 2286 | goto err; |
32942870 | 2287 | } |
0f113f3e | 2288 | |
b2021556 | 2289 | if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) { |
a2c2e000 MC |
2290 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2291 | ERR_R_INTERNAL_ERROR); | |
b2021556 DSH |
2292 | goto err; |
2293 | } | |
44f23cd2 RS |
2294 | #ifdef SSL_DEBUG |
2295 | if (SSL_USE_SIGALGS(s)) | |
2296 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); | |
2297 | #endif | |
f365a3e2 | 2298 | |
73999b62 MC |
2299 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2300 | || PACKET_remaining(pkt) != 0) { | |
a2c2e000 MC |
2301 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2302 | SSL_R_LENGTH_MISMATCH); | |
e1e588ac | 2303 | goto err; |
0f113f3e | 2304 | } |
be8dba2c MC |
2305 | maxsig = EVP_PKEY_size(pkey); |
2306 | if (maxsig < 0) { | |
a2c2e000 MC |
2307 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2308 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2309 | goto err; |
8098fc56 | 2310 | } |
0f113f3e MC |
2311 | |
2312 | /* | |
8098fc56 | 2313 | * Check signature length |
0f113f3e | 2314 | */ |
be8dba2c | 2315 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2316 | /* wrong packet length */ |
a2c2e000 | 2317 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
a230b26e | 2318 | SSL_R_WRONG_SIGNATURE_LENGTH); |
e1e588ac MC |
2319 | goto err; |
2320 | } | |
2321 | ||
2322 | md_ctx = EVP_MD_CTX_new(); | |
2323 | if (md_ctx == NULL) { | |
a2c2e000 | 2324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
dd5a4279 | 2325 | ERR_R_MALLOC_FAILURE); |
e1e588ac | 2326 | goto err; |
0f113f3e | 2327 | } |
e1e588ac | 2328 | |
fe3066ee | 2329 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
a2c2e000 MC |
2330 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2331 | ERR_R_EVP_LIB); | |
fe3066ee MC |
2332 | goto err; |
2333 | } | |
5554facb | 2334 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2335 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2336 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2337 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
a2c2e000 MC |
2338 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2339 | SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
fe3066ee MC |
2340 | goto err; |
2341 | } | |
2342 | } | |
72ceb6a6 DSH |
2343 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2344 | PACKET_remaining(¶ms)); | |
2345 | if (tbslen == 0) { | |
f63a17d6 | 2346 | /* SSLfatal() already called */ |
e1e588ac | 2347 | goto err; |
192e4bbb | 2348 | } |
72ceb6a6 DSH |
2349 | |
2350 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2351 | PACKET_remaining(&signature), tbs, tbslen); | |
2352 | OPENSSL_free(tbs); | |
cfba0675 | 2353 | if (rv <= 0) { |
a2c2e000 MC |
2354 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2355 | SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2356 | goto err; |
0f113f3e | 2357 | } |
e1e588ac | 2358 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2359 | md_ctx = NULL; |
0f113f3e | 2360 | } else { |
7689082b | 2361 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2362 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2363 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2364 | /* Might be wrong key type, check it */ |
e1e588ac | 2365 | if (ssl3_check_cert_and_algorithm(s)) { |
a2c2e000 MC |
2366 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2367 | SSL_R_BAD_DATA); | |
e1e588ac | 2368 | } |
a2c2e000 | 2369 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2370 | goto err; |
2371 | } | |
2372 | /* still data left over */ | |
73999b62 | 2373 | if (PACKET_remaining(pkt) != 0) { |
a2c2e000 MC |
2374 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2375 | SSL_R_EXTRA_DATA_IN_MESSAGE); | |
e1e588ac | 2376 | goto err; |
0f113f3e MC |
2377 | } |
2378 | } | |
e1e588ac | 2379 | |
b9908bf9 | 2380 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2381 | err: |
fe3066ee | 2382 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2383 | return MSG_PROCESS_ERROR; |
0f113f3e | 2384 | } |
d02b48c6 | 2385 | |
be3583fa | 2386 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2387 | { |
32f66107 DSH |
2388 | size_t i; |
2389 | ||
2390 | /* Clear certificate validity flags */ | |
2391 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2392 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2393 | |
03f44b97 | 2394 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2395 | PACKET reqctx, extensions; |
2396 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2397 | |
2398 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2399 | OPENSSL_free(s->s3->tmp.ctype); | |
2400 | s->s3->tmp.ctype = NULL; | |
2401 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2402 | |
03f44b97 DSH |
2403 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2404 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
f63a17d6 MC |
2405 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2406 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2407 | SSL_R_LENGTH_MISMATCH); | |
2408 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2409 | } |
32f66107 DSH |
2410 | |
2411 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
2412 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2413 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2414 | SSL_R_BAD_LENGTH); | |
2415 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2416 | } |
2417 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2418 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2419 | &rawexts, NULL, 1) |
fe874d27 | 2420 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2421 | rawexts, NULL, 0, 1)) { |
2422 | /* SSLfatal() already called */ | |
32f66107 | 2423 | OPENSSL_free(rawexts); |
f63a17d6 | 2424 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2425 | } |
2426 | OPENSSL_free(rawexts); | |
2427 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2428 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2429 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2430 | SSL_R_BAD_LENGTH); | |
2431 | return MSG_PROCESS_ERROR; | |
32f66107 | 2432 | } |
03f44b97 DSH |
2433 | } else { |
2434 | PACKET ctypes; | |
75c13e78 | 2435 | |
03f44b97 DSH |
2436 | /* get the certificate types */ |
2437 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
f63a17d6 MC |
2438 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2439 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2440 | SSL_R_LENGTH_MISMATCH); | |
2441 | return MSG_PROCESS_ERROR; | |
03f44b97 DSH |
2442 | } |
2443 | ||
2444 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
f63a17d6 MC |
2445 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2446 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2447 | ERR_R_INTERNAL_ERROR); | |
2448 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2449 | } |
ac112332 | 2450 | |
32f66107 DSH |
2451 | if (SSL_USE_SIGALGS(s)) { |
2452 | PACKET sigalgs; | |
703bcee0 | 2453 | |
32f66107 | 2454 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
f63a17d6 MC |
2455 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2456 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2457 | SSL_R_LENGTH_MISMATCH); | |
2458 | return MSG_PROCESS_ERROR; | |
32f66107 | 2459 | } |
ac112332 | 2460 | |
32f66107 | 2461 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
f63a17d6 MC |
2462 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2463 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2464 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2465 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2466 | } |
2467 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2468 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2469 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2470 | ERR_R_MALLOC_FAILURE); | |
2471 | return MSG_PROCESS_ERROR; | |
32f66107 | 2472 | } |
0f113f3e | 2473 | } |
0f113f3e | 2474 | |
32f66107 | 2475 | /* get the CA RDNs */ |
f63a17d6 MC |
2476 | if (!parse_ca_names(s, pkt)) { |
2477 | /* SSLfatal() already called */ | |
2478 | return MSG_PROCESS_ERROR; | |
2479 | } | |
03f44b97 DSH |
2480 | } |
2481 | ||
2482 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
2483 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2484 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2485 | SSL_R_LENGTH_MISMATCH); | |
2486 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2487 | } |
0f113f3e | 2488 | |
0f113f3e MC |
2489 | /* we should setup a certificate to return.... */ |
2490 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2491 | |
f63a17d6 | 2492 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2493 | } |
2494 | ||
be3583fa | 2495 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2496 | { |
b9908bf9 | 2497 | unsigned int ticklen; |
9ac6244b | 2498 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2499 | unsigned int sess_len; |
de1df7e9 | 2500 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2501 | PACKET nonce; |
b9908bf9 | 2502 | |
73999b62 | 2503 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2504 | || (SSL_IS_TLS13(s) |
2505 | && (!PACKET_get_net_4(pkt, &age_add) | |
2506 | || !PACKET_get_length_prefixed_1(pkt, &nonce) | |
9b6a8254 MC |
2507 | || !PACKET_memdup(&nonce, &s->session->ext.tick_nonce, |
2508 | &s->session->ext.tick_nonce_len))) | |
a230b26e | 2509 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2510 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2511 | || (SSL_IS_TLS13(s) |
2512 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f63a17d6 MC |
2513 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2514 | SSL_R_LENGTH_MISMATCH); | |
2515 | goto err; | |
e711da71 EK |
2516 | } |
2517 | ||
de1df7e9 MC |
2518 | /* |
2519 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2520 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2521 | * be 0 here in that instance | |
2522 | */ | |
e711da71 | 2523 | if (ticklen == 0) |
c9de4a20 | 2524 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2525 | |
150840b9 MC |
2526 | /* |
2527 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2528 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2529 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2530 | * time a NewSessionTicket arrives because those messages arrive | |
2531 | * post-handshake and the session may have already gone into the session | |
2532 | * cache. | |
2533 | */ | |
2534 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee MC |
2535 | int i = s->session_ctx->session_cache_mode; |
2536 | SSL_SESSION *new_sess; | |
2537 | /* | |
2538 | * We reused an existing session, so we need to replace it with a new | |
2539 | * one | |
2540 | */ | |
5d61491c | 2541 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
f63a17d6 MC |
2542 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2543 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2544 | ERR_R_MALLOC_FAILURE); | |
2545 | goto err; | |
5d61491c MC |
2546 | } |
2547 | ||
98ece4ee MC |
2548 | if (i & SSL_SESS_CACHE_CLIENT) { |
2549 | /* | |
e4612d02 | 2550 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2551 | */ |
e4612d02 | 2552 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2553 | } |
2554 | ||
98ece4ee MC |
2555 | SSL_SESSION_free(s->session); |
2556 | s->session = new_sess; | |
2557 | } | |
2558 | ||
fc24f0bf MC |
2559 | /* |
2560 | * Technically the cast to long here is not guaranteed by the C standard - | |
2561 | * but we use it elsewhere, so this should be ok. | |
2562 | */ | |
2563 | s->session->time = (long)time(NULL); | |
2564 | ||
aff8c126 RS |
2565 | OPENSSL_free(s->session->ext.tick); |
2566 | s->session->ext.tick = NULL; | |
2567 | s->session->ext.ticklen = 0; | |
e711da71 | 2568 | |
aff8c126 RS |
2569 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2570 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
2571 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2572 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2573 | goto err; |
2574 | } | |
aff8c126 | 2575 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
2576 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2577 | SSL_R_LENGTH_MISMATCH); | |
2578 | goto err; | |
561e12bb | 2579 | } |
e711da71 | 2580 | |
aff8c126 | 2581 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2582 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2583 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2584 | |
2585 | if (SSL_IS_TLS13(s)) { | |
2586 | PACKET extpkt; | |
2587 | ||
2588 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
26b9172a | 2589 | || PACKET_remaining(pkt) != 0 |
de1df7e9 | 2590 | || !tls_collect_extensions(s, &extpkt, |
fe874d27 | 2591 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
f63a17d6 | 2592 | &exts, NULL, 1) |
fe874d27 MC |
2593 | || !tls_parse_all_extensions(s, |
2594 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2595 | exts, NULL, 0, 1)) { |
2596 | /* SSLfatal() already called */ | |
2597 | goto err; | |
de1df7e9 MC |
2598 | } |
2599 | } | |
2600 | ||
0f113f3e MC |
2601 | /* |
2602 | * There are two ways to detect a resumed ticket session. One is to set | |
2603 | * an appropriate session ID and then the server must return a match in | |
2604 | * ServerHello. This allows the normal client session ID matching to work | |
2605 | * and we know much earlier that the ticket has been accepted. The | |
2606 | * other way is to set zero length session ID when the ticket is | |
2607 | * presented and rely on the handshake to determine session resumption. | |
2608 | * We choose the former approach because this fits in with assumptions | |
2609 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2610 | * SHA256 is disabled) hash of the ticket. | |
2611 | */ | |
ec60ccc1 MC |
2612 | /* |
2613 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2614 | * but s->session->session_id_length is a size_t | |
2615 | */ | |
aff8c126 | 2616 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2617 | s->session->session_id, &sess_len, |
d166ed8c | 2618 | EVP_sha256(), NULL)) { |
f63a17d6 MC |
2619 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2620 | ERR_R_EVP_LIB); | |
d166ed8c DSH |
2621 | goto err; |
2622 | } | |
ec60ccc1 | 2623 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2624 | |
2625 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2626 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2627 | OPENSSL_free(exts); |
de1df7e9 MC |
2628 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2629 | return MSG_PROCESS_FINISHED_READING; | |
2630 | } | |
2631 | ||
b9908bf9 | 2632 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2633 | err: |
33d93417 | 2634 | OPENSSL_free(exts); |
b9908bf9 | 2635 | return MSG_PROCESS_ERROR; |
0f113f3e | 2636 | } |
67c8e7f4 | 2637 | |
f63e4288 MC |
2638 | /* |
2639 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2640 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2641 | */ |
f63a17d6 | 2642 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2643 | { |
8b0e934a | 2644 | size_t resplen; |
b9908bf9 | 2645 | unsigned int type; |
b9908bf9 | 2646 | |
73999b62 | 2647 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2648 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
2649 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2650 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
f63e4288 | 2651 | return 0; |
0f113f3e | 2652 | } |
56a26ce3 MC |
2653 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2654 | || PACKET_remaining(pkt) != resplen) { | |
f63a17d6 MC |
2655 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2656 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2657 | return 0; |
0f113f3e | 2658 | } |
8cbfcc70 RS |
2659 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2660 | if (s->ext.ocsp.resp == NULL) { | |
f63a17d6 MC |
2661 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2662 | ERR_R_MALLOC_FAILURE); | |
f63e4288 | 2663 | return 0; |
0f113f3e | 2664 | } |
8cbfcc70 | 2665 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63a17d6 MC |
2666 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2667 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2668 | return 0; |
ac63710a | 2669 | } |
8cbfcc70 | 2670 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2671 | |
2672 | return 1; | |
2673 | } | |
2faa1b48 | 2674 | |
f63e4288 MC |
2675 | |
2676 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2677 | { | |
f63a17d6 MC |
2678 | if (!tls_process_cert_status_body(s, pkt)) { |
2679 | /* SSLfatal() already called */ | |
f63e4288 MC |
2680 | return MSG_PROCESS_ERROR; |
2681 | } | |
2682 | ||
b9908bf9 | 2683 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2684 | } |
d02b48c6 | 2685 | |
7776a36c MC |
2686 | /* |
2687 | * Perform miscellaneous checks and processing after we have received the | |
2688 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2689 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2690 | * on failure. | |
7776a36c | 2691 | */ |
f63a17d6 | 2692 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2693 | { |
a455d0f6 MC |
2694 | /* |
2695 | * at this point we check that we have the required stuff from | |
2696 | * the server | |
2697 | */ | |
2698 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2699 | /* SSLfatal() already called */ |
7776a36c | 2700 | return 0; |
a455d0f6 MC |
2701 | } |
2702 | ||
bb1aaab4 | 2703 | /* |
aff8c126 RS |
2704 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2705 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2706 | * message, or NULL and -1 otherwise |
2707 | */ | |
aff8c126 RS |
2708 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2709 | && s->ctx->ext.status_cb != NULL) { | |
2710 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2711 | ||
bb1aaab4 | 2712 | if (ret == 0) { |
f63a17d6 MC |
2713 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
2714 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2715 | SSL_R_INVALID_STATUS_RESPONSE); | |
7776a36c | 2716 | return 0; |
bb1aaab4 MC |
2717 | } |
2718 | if (ret < 0) { | |
f63a17d6 MC |
2719 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2720 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
dd5a4279 | 2721 | ERR_R_MALLOC_FAILURE); |
7776a36c | 2722 | return 0; |
bb1aaab4 MC |
2723 | } |
2724 | } | |
ed29e82a RP |
2725 | #ifndef OPENSSL_NO_CT |
2726 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2727 | /* Note we validate the SCTs whether or not we abort on error */ |
2728 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2729 | /* SSLfatal() already called */ |
7776a36c | 2730 | return 0; |
ed29e82a RP |
2731 | } |
2732 | } | |
2733 | #endif | |
2734 | ||
7776a36c MC |
2735 | return 1; |
2736 | } | |
2737 | ||
2738 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2739 | { | |
7776a36c MC |
2740 | if (PACKET_remaining(pkt) > 0) { |
2741 | /* should contain no data */ | |
f63a17d6 MC |
2742 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2743 | SSL_R_LENGTH_MISMATCH); | |
2744 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2745 | } |
2746 | #ifndef OPENSSL_NO_SRP | |
2747 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2748 | if (SRP_Calc_A_param(s) <= 0) { | |
f63a17d6 MC |
2749 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2750 | SSL_R_SRP_A_CALC); | |
2751 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2752 | } |
2753 | } | |
2754 | #endif | |
2755 | ||
f63a17d6 MC |
2756 | if (!tls_process_initial_server_flight(s)) { |
2757 | /* SSLfatal() already called */ | |
2758 | return MSG_PROCESS_ERROR; | |
2759 | } | |
7776a36c | 2760 | |
bd79bcb4 | 2761 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2762 | } |
176f31dd | 2763 | |
a2c2e000 | 2764 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2765 | { |
7689082b | 2766 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2767 | int ret = 0; |
2768 | /* | |
2769 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2770 | * \0-terminated identity. The last byte is for us for simulating | |
2771 | * strnlen. | |
2772 | */ | |
2773 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2774 | size_t identitylen = 0; | |
2775 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2776 | unsigned char *tmppsk = NULL; | |
2777 | char *tmpidentity = NULL; | |
2778 | size_t psklen = 0; | |
2779 | ||
2780 | if (s->psk_client_callback == NULL) { | |
a2c2e000 MC |
2781 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2782 | SSL_R_PSK_NO_CLIENT_CB); | |
13c0ec4a MC |
2783 | goto err; |
2784 | } | |
d02b48c6 | 2785 | |
13c0ec4a | 2786 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2787 | |
13c0ec4a MC |
2788 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2789 | identity, sizeof(identity) - 1, | |
2790 | psk, sizeof(psk)); | |
7689082b | 2791 | |
13c0ec4a | 2792 | if (psklen > PSK_MAX_PSK_LEN) { |
a2c2e000 MC |
2793 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2794 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2795 | goto err; |
2796 | } else if (psklen == 0) { | |
a2c2e000 MC |
2797 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2798 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, | |
2799 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
13c0ec4a MC |
2800 | goto err; |
2801 | } | |
7689082b | 2802 | |
13c0ec4a MC |
2803 | identitylen = strlen(identity); |
2804 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2805 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2806 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2807 | goto err; |
2808 | } | |
7689082b | 2809 | |
13c0ec4a MC |
2810 | tmppsk = OPENSSL_memdup(psk, psklen); |
2811 | tmpidentity = OPENSSL_strdup(identity); | |
2812 | if (tmppsk == NULL || tmpidentity == NULL) { | |
a2c2e000 MC |
2813 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2814 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2815 | goto err; |
2816 | } | |
7689082b | 2817 | |
13c0ec4a MC |
2818 | OPENSSL_free(s->s3->tmp.psk); |
2819 | s->s3->tmp.psk = tmppsk; | |
2820 | s->s3->tmp.psklen = psklen; | |
2821 | tmppsk = NULL; | |
2822 | OPENSSL_free(s->session->psk_identity); | |
2823 | s->session->psk_identity = tmpidentity; | |
2824 | tmpidentity = NULL; | |
f1ec23c0 | 2825 | |
b2b3024e | 2826 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
a2c2e000 MC |
2827 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2828 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2829 | goto err; |
2830 | } | |
7689082b | 2831 | |
13c0ec4a | 2832 | ret = 1; |
0bce0b02 | 2833 | |
13c0ec4a MC |
2834 | err: |
2835 | OPENSSL_cleanse(psk, psklen); | |
2836 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2837 | OPENSSL_clear_free(tmppsk, psklen); | |
2838 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2839 | |
13c0ec4a MC |
2840 | return ret; |
2841 | #else | |
a2c2e000 MC |
2842 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2843 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2844 | return 0; |
b9908bf9 | 2845 | #endif |
13c0ec4a | 2846 | } |
b9908bf9 | 2847 | |
a2c2e000 | 2848 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2849 | { |
bc36ee62 | 2850 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2851 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2852 | EVP_PKEY *pkey = NULL; |
2853 | EVP_PKEY_CTX *pctx = NULL; | |
2854 | size_t enclen; | |
2855 | unsigned char *pms = NULL; | |
2856 | size_t pmslen = 0; | |
b9908bf9 | 2857 | |
13c0ec4a MC |
2858 | if (s->session->peer == NULL) { |
2859 | /* | |
2860 | * We should always have a server certificate with SSL_kRSA. | |
2861 | */ | |
a2c2e000 MC |
2862 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2863 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2864 | return 0; |
2865 | } | |
0f113f3e | 2866 | |
13c0ec4a MC |
2867 | pkey = X509_get0_pubkey(s->session->peer); |
2868 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
a2c2e000 MC |
2869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2870 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2871 | return 0; |
2872 | } | |
0f113f3e | 2873 | |
13c0ec4a MC |
2874 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2875 | pms = OPENSSL_malloc(pmslen); | |
2876 | if (pms == NULL) { | |
a2c2e000 MC |
2877 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2878 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2879 | return 0; |
2880 | } | |
0bce0b02 | 2881 | |
13c0ec4a MC |
2882 | pms[0] = s->client_version >> 8; |
2883 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2884 | /* TODO(size_t): Convert this function */ |
ae3947de | 2885 | if (ssl_randbytes(s, pms + 2, (int)(pmslen - 2)) <= 0) { |
a2c2e000 MC |
2886 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2887 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2888 | goto err; |
2889 | } | |
0f113f3e | 2890 | |
13c0ec4a | 2891 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2892 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
a2c2e000 MC |
2893 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2894 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2895 | goto err; |
2896 | } | |
13c0ec4a MC |
2897 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2898 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2899 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2900 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2901 | ERR_R_EVP_LIB); | |
13c0ec4a MC |
2902 | goto err; |
2903 | } | |
f1ec23c0 MC |
2904 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2905 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2906 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2907 | SSL_R_BAD_RSA_ENCRYPT); | |
13c0ec4a MC |
2908 | goto err; |
2909 | } | |
13c0ec4a MC |
2910 | EVP_PKEY_CTX_free(pctx); |
2911 | pctx = NULL; | |
0f113f3e | 2912 | |
13c0ec4a | 2913 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2914 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
a2c2e000 MC |
2915 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2916 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2917 | goto err; |
b9908bf9 | 2918 | } |
13c0ec4a | 2919 | |
2faa1b48 | 2920 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
2921 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
2922 | /* SSLfatal() already called */ | |
2faa1b48 | 2923 | goto err; |
a2c2e000 | 2924 | } |
2faa1b48 | 2925 | |
26fb4b03 RS |
2926 | s->s3->tmp.pms = pms; |
2927 | s->s3->tmp.pmslen = pmslen; | |
2928 | ||
13c0ec4a MC |
2929 | return 1; |
2930 | err: | |
2931 | OPENSSL_clear_free(pms, pmslen); | |
2932 | EVP_PKEY_CTX_free(pctx); | |
2933 | ||
2934 | return 0; | |
2935 | #else | |
a2c2e000 MC |
2936 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2937 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2938 | return 0; |
f9b3bff6 | 2939 | #endif |
13c0ec4a MC |
2940 | } |
2941 | ||
a2c2e000 | 2942 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 MC |
2943 | { |
2944 | #ifndef OPENSSL_NO_DH | |
2945 | DH *dh_clnt = NULL; | |
2946 | const BIGNUM *pub_key; | |
2947 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2948 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2949 | |
2950 | skey = s->s3->peer_tmp; | |
a2c2e000 MC |
2951 | if (skey == NULL) { |
2952 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2953 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2954 | goto err; |
a2c2e000 | 2955 | } |
f1ec23c0 | 2956 | |
0a699a07 | 2957 | ckey = ssl_generate_pkey(skey); |
a2c2e000 MC |
2958 | if (ckey == NULL) { |
2959 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2960 | ERR_R_INTERNAL_ERROR); | |
b599ce3b | 2961 | goto err; |
a2c2e000 | 2962 | } |
b599ce3b | 2963 | |
a8c1c704 MC |
2964 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2965 | ||
a2c2e000 MC |
2966 | if (dh_clnt == NULL) { |
2967 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2968 | ERR_R_INTERNAL_ERROR); | |
2969 | goto err; | |
2970 | } | |
2971 | ||
2972 | if (ssl_derive(s, ckey, skey, 0) == 0) { | |
2973 | /* SSLfatal() already called */ | |
f1ec23c0 | 2974 | goto err; |
a2c2e000 | 2975 | } |
a8c1c704 MC |
2976 | |
2977 | /* send off the data */ | |
2978 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
a2c2e000 MC |
2979 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), |
2980 | &keybytes)) { | |
2981 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2982 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2983 | goto err; |
a2c2e000 | 2984 | } |
f1ec23c0 MC |
2985 | |
2986 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2987 | EVP_PKEY_free(ckey); |
2988 | ||
2989 | return 1; | |
f1ec23c0 MC |
2990 | err: |
2991 | EVP_PKEY_free(ckey); | |
f9f674eb MC |
2992 | return 0; |
2993 | #else | |
a2c2e000 MC |
2994 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, |
2995 | ERR_R_INTERNAL_ERROR); | |
a8c1c704 | 2996 | return 0; |
f9f674eb | 2997 | #endif |
a8c1c704 MC |
2998 | } |
2999 | ||
a2c2e000 | 3000 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab MC |
3001 | { |
3002 | #ifndef OPENSSL_NO_EC | |
3003 | unsigned char *encodedPoint = NULL; | |
348240c6 | 3004 | size_t encoded_pt_len = 0; |
67ad5aab | 3005 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3006 | int ret = 0; |
67ad5aab MC |
3007 | |
3008 | skey = s->s3->peer_tmp; | |
ec24630a | 3009 | if (skey == NULL) { |
a2c2e000 MC |
3010 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3011 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3012 | return 0; |
3013 | } | |
3014 | ||
0a699a07 | 3015 | ckey = ssl_generate_pkey(skey); |
b599ce3b | 3016 | if (ckey == NULL) { |
a2c2e000 MC |
3017 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3018 | ERR_R_MALLOC_FAILURE); | |
b599ce3b MC |
3019 | goto err; |
3020 | } | |
67ad5aab | 3021 | |
0f1e51ea | 3022 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3023 | /* SSLfatal() already called */ |
67ad5aab MC |
3024 | goto err; |
3025 | } | |
3026 | ||
3027 | /* Generate encoding of client key */ | |
ec24630a | 3028 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
3029 | |
3030 | if (encoded_pt_len == 0) { | |
a2c2e000 MC |
3031 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3032 | ERR_R_EC_LIB); | |
67ad5aab MC |
3033 | goto err; |
3034 | } | |
3035 | ||
b2b3024e | 3036 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
a2c2e000 MC |
3037 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3038 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
3039 | goto err; |
3040 | } | |
67ad5aab | 3041 | |
f1ec23c0 | 3042 | ret = 1; |
67ad5aab | 3043 | err: |
f1ec23c0 | 3044 | OPENSSL_free(encodedPoint); |
67ad5aab | 3045 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3046 | return ret; |
67ad5aab | 3047 | #else |
a2c2e000 MC |
3048 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3049 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3050 | return 0; |
3051 | #endif | |
3052 | } | |
3053 | ||
a2c2e000 | 3054 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3055 | { |
3056 | #ifndef OPENSSL_NO_GOST | |
3057 | /* GOST key exchange message creation */ | |
3058 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3059 | X509 *peer_cert; | |
3060 | size_t msglen; | |
3061 | unsigned int md_len; | |
3062 | unsigned char shared_ukm[32], tmp[256]; | |
3063 | EVP_MD_CTX *ukm_hash = NULL; | |
3064 | int dgst_nid = NID_id_GostR3411_94; | |
3065 | unsigned char *pms = NULL; | |
3066 | size_t pmslen = 0; | |
3067 | ||
3068 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
3069 | dgst_nid = NID_id_GostR3411_2012_256; | |
3070 | ||
3071 | /* | |
1ee4b98e | 3072 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3073 | */ |
3074 | peer_cert = s->session->peer; | |
3075 | if (!peer_cert) { | |
a2c2e000 | 3076 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
3077 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
3078 | return 0; | |
3079 | } | |
3080 | ||
3081 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
3082 | if (pkey_ctx == NULL) { | |
a2c2e000 MC |
3083 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3084 | ERR_R_MALLOC_FAILURE); | |
e00e0b3d MC |
3085 | return 0; |
3086 | } | |
3087 | /* | |
3088 | * If we have send a certificate, and certificate key | |
3089 | * parameters match those of server certificate, use | |
3090 | * certificate key for key exchange | |
3091 | */ | |
3092 | ||
3093 | /* Otherwise, generate ephemeral key pair */ | |
3094 | pmslen = 32; | |
3095 | pms = OPENSSL_malloc(pmslen); | |
3096 | if (pms == NULL) { | |
a2c2e000 MC |
3097 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3098 | ERR_R_MALLOC_FAILURE); | |
2f3930bc | 3099 | goto err; |
e00e0b3d MC |
3100 | } |
3101 | ||
3102 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3103 | /* Generate session key |
3104 | * TODO(size_t): Convert this function | |
3105 | */ | |
ae3947de | 3106 | || ssl_randbytes(s, pms, (int)pmslen) <= 0) { |
a2c2e000 MC |
3107 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3108 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3109 | goto err; |
3110 | }; | |
e00e0b3d MC |
3111 | /* |
3112 | * Compute shared IV and store it in algorithm-specific context | |
3113 | * data | |
3114 | */ | |
3115 | ukm_hash = EVP_MD_CTX_new(); | |
3116 | if (ukm_hash == NULL | |
a230b26e EK |
3117 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3118 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3119 | SSL3_RANDOM_SIZE) <= 0 | |
3120 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3121 | SSL3_RANDOM_SIZE) <= 0 | |
3122 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
a2c2e000 MC |
3123 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3124 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3125 | goto err; |
3126 | } | |
3127 | EVP_MD_CTX_free(ukm_hash); | |
3128 | ukm_hash = NULL; | |
3129 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3130 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
a2c2e000 MC |
3131 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3132 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3133 | goto err; |
3134 | } | |
3135 | /* Make GOST keytransport blob message */ | |
3136 | /* | |
3137 | * Encapsulate it into sequence | |
3138 | */ | |
e00e0b3d MC |
3139 | msglen = 255; |
3140 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3142 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3143 | goto err; |
3144 | } | |
f1ec23c0 | 3145 | |
08029dfa MC |
3146 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3147 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3148 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
a2c2e000 MC |
3149 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3150 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3151 | goto err; |
e00e0b3d | 3152 | } |
f1ec23c0 | 3153 | |
e00e0b3d MC |
3154 | EVP_PKEY_CTX_free(pkey_ctx); |
3155 | s->s3->tmp.pms = pms; | |
3156 | s->s3->tmp.pmslen = pmslen; | |
3157 | ||
3158 | return 1; | |
3159 | err: | |
3160 | EVP_PKEY_CTX_free(pkey_ctx); | |
3161 | OPENSSL_clear_free(pms, pmslen); | |
3162 | EVP_MD_CTX_free(ukm_hash); | |
3163 | return 0; | |
3164 | #else | |
a2c2e000 MC |
3165 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3166 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3167 | return 0; |
3168 | #endif | |
3169 | } | |
3170 | ||
a2c2e000 | 3171 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3172 | { |
8b9546c7 | 3173 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3174 | unsigned char *abytes = NULL; |
3175 | ||
3176 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3177 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3178 | &abytes)) { | |
a2c2e000 MC |
3179 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3180 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3181 | return 0; |
3182 | } | |
f1ec23c0 MC |
3183 | BN_bn2bin(s->srp_ctx.A, abytes); |
3184 | ||
840a2bf8 MC |
3185 | OPENSSL_free(s->session->srp_username); |
3186 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3187 | if (s->session->srp_username == NULL) { | |
a2c2e000 MC |
3188 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3189 | ERR_R_MALLOC_FAILURE); | |
840a2bf8 MC |
3190 | return 0; |
3191 | } | |
3192 | ||
3193 | return 1; | |
3194 | #else | |
a2c2e000 MC |
3195 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3196 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3197 | return 0; |
3198 | #endif | |
3199 | } | |
3200 | ||
7cea05dc | 3201 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3202 | { |
13c0ec4a | 3203 | unsigned long alg_k; |
13c0ec4a | 3204 | |
f1ec23c0 | 3205 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3206 | |
a2c2e000 MC |
3207 | /* |
3208 | * All of the construct functions below call SSLfatal() if necessary so | |
3209 | * no need to do so here. | |
3210 | */ | |
13c0ec4a | 3211 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3212 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3213 | goto err; |
3214 | ||
f1ec23c0 | 3215 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3216 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3217 | goto err; |
a8c1c704 | 3218 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3219 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3220 | goto err; |
67ad5aab | 3221 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3222 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3223 | goto err; |
e00e0b3d | 3224 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3225 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3226 | goto err; |
840a2bf8 | 3227 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3228 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3229 | goto err; |
4a424545 | 3230 | } else if (!(alg_k & SSL_kPSK)) { |
a2c2e000 MC |
3231 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3232 | SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3233 | goto err; |
3234 | } | |
3235 | ||
b9908bf9 | 3236 | return 1; |
0f113f3e | 3237 | err: |
0bce0b02 | 3238 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3239 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3240 | #ifndef OPENSSL_NO_PSK |
3241 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3242 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3243 | #endif |
b9908bf9 MC |
3244 | return 0; |
3245 | } | |
3246 | ||
3247 | int tls_client_key_exchange_post_work(SSL *s) | |
3248 | { | |
3249 | unsigned char *pms = NULL; | |
3250 | size_t pmslen = 0; | |
3251 | ||
6f137370 MC |
3252 | pms = s->s3->tmp.pms; |
3253 | pmslen = s->s3->tmp.pmslen; | |
3254 | ||
b9908bf9 MC |
3255 | #ifndef OPENSSL_NO_SRP |
3256 | /* Check for SRP */ | |
3257 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3258 | if (!srp_generate_client_master_secret(s)) { | |
a2c2e000 | 3259 | /* SSLfatal() already called */ |
b9908bf9 MC |
3260 | goto err; |
3261 | } | |
3262 | return 1; | |
3263 | } | |
3264 | #endif | |
b9908bf9 MC |
3265 | |
3266 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
a2c2e000 MC |
3267 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3268 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
b9908bf9 MC |
3269 | goto err; |
3270 | } | |
3271 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3272 | /* SSLfatal() already called */ |
6f137370 MC |
3273 | /* ssl_generate_master_secret frees the pms even on error */ |
3274 | pms = NULL; | |
3275 | pmslen = 0; | |
b9908bf9 MC |
3276 | goto err; |
3277 | } | |
6f137370 MC |
3278 | pms = NULL; |
3279 | pmslen = 0; | |
473483d4 MC |
3280 | |
3281 | #ifndef OPENSSL_NO_SCTP | |
3282 | if (SSL_IS_DTLS(s)) { | |
3283 | unsigned char sctpauthkey[64]; | |
3284 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3285 | ||
3286 | /* | |
3287 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3288 | * used. | |
3289 | */ | |
141eb8c6 MC |
3290 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3291 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3292 | |
3293 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e | 3294 | sizeof(sctpauthkey), labelbuffer, |
a2c2e000 MC |
3295 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
3296 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
dd5a4279 MC |
3297 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, |
3298 | ERR_R_INTERNAL_ERROR); | |
473483d4 | 3299 | goto err; |
a2c2e000 | 3300 | } |
473483d4 MC |
3301 | |
3302 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3303 | sizeof(sctpauthkey), sctpauthkey); | |
3304 | } | |
3305 | #endif | |
3306 | ||
b9908bf9 MC |
3307 | return 1; |
3308 | err: | |
3309 | OPENSSL_clear_free(pms, pmslen); | |
3310 | s->s3->tmp.pms = NULL; | |
3311 | return 0; | |
0f113f3e | 3312 | } |
d02b48c6 | 3313 | |
0f113f3e MC |
3314 | /* |
3315 | * Check a certificate can be used for client authentication. Currently check | |
3316 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3317 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3318 | */ |
3319 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3320 | { |
0f113f3e | 3321 | /* If no suitable signature algorithm can't use certificate */ |
f63a17d6 | 3322 | if (!tls_choose_sigalg(s, 0) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3323 | return 0; |
3324 | /* | |
3325 | * If strict mode check suitability of chain before using it. This also | |
3326 | * adjusts suite B digest if necessary. | |
3327 | */ | |
3328 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3329 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3330 | return 0; | |
0f113f3e MC |
3331 | return 1; |
3332 | } | |
0d609395 | 3333 | |
be3583fa | 3334 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3335 | { |
3336 | X509 *x509 = NULL; | |
3337 | EVP_PKEY *pkey = NULL; | |
3338 | int i; | |
3339 | ||
b9908bf9 | 3340 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3341 | /* Let cert callback update client certificates if required */ |
3342 | if (s->cert->cert_cb) { | |
3343 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3344 | if (i < 0) { | |
3345 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3346 | return WORK_MORE_A; |
0f113f3e MC |
3347 | } |
3348 | if (i == 0) { | |
f63a17d6 MC |
3349 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3350 | SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, | |
3351 | SSL_R_CALLBACK_FAILED); | |
eb5fd03b | 3352 | return WORK_ERROR; |
0f113f3e MC |
3353 | } |
3354 | s->rwstate = SSL_NOTHING; | |
3355 | } | |
3356 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3357 | return WORK_FINISHED_CONTINUE; |
3358 | ||
3359 | /* Fall through to WORK_MORE_B */ | |
3360 | wst = WORK_MORE_B; | |
0f113f3e MC |
3361 | } |
3362 | ||
3363 | /* We need to get a client cert */ | |
b9908bf9 | 3364 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3365 | /* |
3366 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3367 | * return(-1); We then get retied later | |
3368 | */ | |
0f113f3e MC |
3369 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3370 | if (i < 0) { | |
3371 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3372 | return WORK_MORE_B; |
0f113f3e MC |
3373 | } |
3374 | s->rwstate = SSL_NOTHING; | |
3375 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3376 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3377 | i = 0; | |
3378 | } else if (i == 1) { | |
3379 | i = 0; | |
b9908bf9 | 3380 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3381 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3382 | } | |
3383 | ||
222561fe | 3384 | X509_free(x509); |
25aaa98a | 3385 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3386 | if (i && !ssl3_check_client_certificate(s)) |
3387 | i = 0; | |
3388 | if (i == 0) { | |
3389 | if (s->version == SSL3_VERSION) { | |
3390 | s->s3->tmp.cert_req = 0; | |
3391 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3392 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3393 | } else { |
3394 | s->s3->tmp.cert_req = 2; | |
124037fd | 3395 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3396 | /* SSLfatal() already called */ |
eb5fd03b | 3397 | return WORK_ERROR; |
dab18ab5 | 3398 | } |
0f113f3e MC |
3399 | } |
3400 | } | |
3401 | ||
b9908bf9 | 3402 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3403 | } |
3404 | ||
b9908bf9 | 3405 | /* Shouldn't ever get here */ |
a2c2e000 MC |
3406 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
3407 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3408 | return WORK_ERROR; |
3409 | } | |
3410 | ||
7cea05dc | 3411 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3412 | { |
e96e0f8e MC |
3413 | /* |
3414 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3415 | * later | |
3416 | */ | |
f63a17d6 MC |
3417 | if (SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) { |
3418 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3419 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3420 | return 0; | |
3421 | } | |
3422 | if (!ssl3_output_cert_chain(s, pkt, | |
3423 | (s->s3->tmp.cert_req == 2) ? NULL | |
3424 | : s->cert->key)) { | |
3425 | /* SSLfatal() already called */ | |
3426 | return 0; | |
f7e393be MC |
3427 | } |
3428 | ||
3429 | if (SSL_IS_TLS13(s) | |
3430 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3431 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3432 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3433 | /* |
a2c2e000 | 3434 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3435 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3436 | */ |
f63a17d6 | 3437 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, |
dd5a4279 | 3438 | SSL_R_CANNOT_CHANGE_CIPHER); |
c31ad0bb | 3439 | return 0; |
0f113f3e | 3440 | } |
b9908bf9 MC |
3441 | |
3442 | return 1; | |
0f113f3e MC |
3443 | } |
3444 | ||
36d16f8e | 3445 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3446 | { |
dd24857b DSH |
3447 | const SSL_CERT_LOOKUP *clu; |
3448 | size_t idx; | |
0f113f3e | 3449 | long alg_k, alg_a; |
d02b48c6 | 3450 | |
0f113f3e MC |
3451 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3452 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3453 | |
0f113f3e | 3454 | /* we don't have a certificate */ |
dd24857b DSH |
3455 | if (!(alg_a & SSL_aCERT)) |
3456 | return 1; | |
d02b48c6 | 3457 | |
0f113f3e | 3458 | /* This is the passed certificate */ |
dd24857b | 3459 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3460 | |
dd24857b DSH |
3461 | /* Check certificate is recognised and suitable for cipher */ |
3462 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
f63a17d6 MC |
3463 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3464 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3465 | SSL_R_MISSING_SIGNING_CERT); | |
3466 | return 0; | |
0f113f3e | 3467 | } |
0f113f3e | 3468 | |
dd24857b DSH |
3469 | #ifndef OPENSSL_NO_EC |
3470 | if (clu->amask & SSL_aECDSA) { | |
3471 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3472 | return 1; | |
f63a17d6 MC |
3473 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3474 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3475 | return 0; | |
0f113f3e | 3476 | } |
d02b48c6 | 3477 | #endif |
bc36ee62 | 3478 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3479 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 MC |
3480 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3481 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3482 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3483 | return 0; | |
0f113f3e | 3484 | } |
79df9d62 | 3485 | #endif |
bc36ee62 | 3486 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3487 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
f63a17d6 MC |
3488 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3489 | ERR_R_INTERNAL_ERROR); | |
3490 | return 0; | |
0f113f3e | 3491 | } |
d02b48c6 RE |
3492 | #endif |
3493 | ||
dd24857b | 3494 | return 1; |
0f113f3e MC |
3495 | } |
3496 | ||
e481f9b9 | 3497 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3498 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3499 | { |
15e6be6c MC |
3500 | size_t len, padding_len; |
3501 | unsigned char *padding = NULL; | |
15e6be6c | 3502 | |
aff8c126 | 3503 | len = s->ext.npn_len; |
b9908bf9 | 3504 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3505 | |
aff8c126 | 3506 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3507 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
a2c2e000 MC |
3508 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_NEXT_PROTO, |
3509 | ERR_R_INTERNAL_ERROR); | |
3510 | return 0; | |
15e6be6c MC |
3511 | } |
3512 | ||
3513 | memset(padding, 0, padding_len); | |
3514 | ||
b9908bf9 MC |
3515 | return 1; |
3516 | } | |
6434abbf | 3517 | #endif |
368888bc | 3518 | |
c7f47786 MC |
3519 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3520 | { | |
3521 | if (PACKET_remaining(pkt) > 0) { | |
3522 | /* should contain no data */ | |
f63a17d6 MC |
3523 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_REQ, |
3524 | SSL_R_LENGTH_MISMATCH); | |
c7f47786 MC |
3525 | return MSG_PROCESS_ERROR; |
3526 | } | |
3527 | ||
db0f35dd TS |
3528 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3529 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3530 | return MSG_PROCESS_FINISHED_READING; | |
3531 | } | |
3532 | ||
c7f47786 | 3533 | /* |
1f04f23e MC |
3534 | * This is a historical discrepancy (not in the RFC) maintained for |
3535 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3536 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3537 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3538 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3539 | */ |
3540 | if (SSL_IS_DTLS(s)) | |
3541 | SSL_renegotiate(s); | |
3542 | else | |
3543 | SSL_renegotiate_abbreviated(s); | |
3544 | ||
3545 | return MSG_PROCESS_FINISHED_READING; | |
3546 | } | |
3547 | ||
e46f2334 MC |
3548 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3549 | { | |
e46f2334 | 3550 | PACKET extensions; |
3434f40b | 3551 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3552 | |
26b9172a MC |
3553 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3554 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3555 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, |
3556 | SSL_R_LENGTH_MISMATCH); | |
e46f2334 MC |
3557 | goto err; |
3558 | } | |
3559 | ||
fe874d27 MC |
3560 | if (!tls_collect_extensions(s, &extensions, |
3561 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3562 | NULL, 1) |
fe874d27 | 3563 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3564 | rawexts, NULL, 0, 1)) { |
3565 | /* SSLfatal() already called */ | |
3434f40b | 3566 | goto err; |
f63a17d6 | 3567 | } |
3434f40b | 3568 | |
1b0286a3 | 3569 | OPENSSL_free(rawexts); |
e46f2334 MC |
3570 | return MSG_PROCESS_CONTINUE_READING; |
3571 | ||
3572 | err: | |
1b0286a3 | 3573 | OPENSSL_free(rawexts); |
e46f2334 MC |
3574 | return MSG_PROCESS_ERROR; |
3575 | } | |
3576 | ||
368888bc | 3577 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3578 | { |
3579 | int i = 0; | |
368888bc | 3580 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3581 | if (s->ctx->client_cert_engine) { |
3582 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3583 | SSL_get_client_CA_list(s), | |
3584 | px509, ppkey, NULL, NULL, NULL); | |
3585 | if (i != 0) | |
3586 | return i; | |
3587 | } | |
3588 | #endif | |
3589 | if (s->ctx->client_cert_cb) | |
3590 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3591 | return i; | |
3592 | } | |
d45ba43d | 3593 | |
ae2f7b37 | 3594 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3595 | { |
2c7b4dbc | 3596 | int i; |
aafec89c | 3597 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d MC |
3598 | int empty_reneg_info_scsv = !s->renegotiate; |
3599 | /* Set disabled masks for this session */ | |
3600 | ssl_set_client_disabled(s); | |
3601 | ||
f63a17d6 MC |
3602 | if (sk == NULL) { |
3603 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3604 | ERR_R_INTERNAL_ERROR); | |
26a7d938 | 3605 | return 0; |
f63a17d6 | 3606 | } |
d45ba43d | 3607 | |
2c7b4dbc MC |
3608 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3609 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3610 | # error Max cipher length too short | |
3611 | # endif | |
3612 | /* | |
3613 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3614 | * chop number of supported ciphers to keep it well below this if we | |
3615 | * use TLS v1.2 | |
3616 | */ | |
3617 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3618 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3619 | else | |
3620 | #endif | |
3621 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3622 | maxlen = 0xfffe; | |
3623 | ||
3624 | if (empty_reneg_info_scsv) | |
3625 | maxlen -= 2; | |
3626 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3627 | maxlen -= 2; | |
3628 | ||
3629 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3630 | const SSL_CIPHER *c; | |
3631 | ||
d45ba43d MC |
3632 | c = sk_SSL_CIPHER_value(sk, i); |
3633 | /* Skip disabled ciphers */ | |
8af91fd9 | 3634 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3635 | continue; |
2c7b4dbc MC |
3636 | |
3637 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
f63a17d6 MC |
3638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3639 | ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3640 | return 0; |
3641 | } | |
3642 | ||
aafec89c MC |
3643 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3644 | if (!maxverok) { | |
3645 | if (SSL_IS_DTLS(s)) { | |
3646 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3647 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3648 | maxverok = 1; | |
3649 | } else { | |
3650 | if (c->max_tls >= s->s3->tmp.max_ver | |
3651 | && c->min_tls <= s->s3->tmp.max_ver) | |
3652 | maxverok = 1; | |
3653 | } | |
3654 | } | |
3655 | ||
2c7b4dbc | 3656 | totlen += len; |
d45ba43d | 3657 | } |
2c7b4dbc | 3658 | |
aafec89c | 3659 | if (totlen == 0 || !maxverok) { |
f63a17d6 MC |
3660 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3661 | SSL_R_NO_CIPHERS_AVAILABLE); | |
aafec89c MC |
3662 | |
3663 | if (!maxverok) | |
3664 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3665 | "SSL/TLS version"); | |
3666 | ||
2c7b4dbc MC |
3667 | return 0; |
3668 | } | |
3669 | ||
3670 | if (totlen != 0) { | |
d45ba43d MC |
3671 | if (empty_reneg_info_scsv) { |
3672 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3673 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3674 | }; |
2c7b4dbc | 3675 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3676 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3677 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3678 | return 0; |
3679 | } | |
d45ba43d MC |
3680 | } |
3681 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3682 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3683 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3684 | }; |
2c7b4dbc | 3685 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3686 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3687 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3688 | return 0; |
3689 | } | |
d45ba43d MC |
3690 | } |
3691 | } | |
3692 | ||
2c7b4dbc | 3693 | return 1; |
d45ba43d | 3694 | } |
ef6c191b MC |
3695 | |
3696 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3697 | { | |
3698 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3699 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
635c8f77 MC |
3700 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3701 | SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3702 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
ef6c191b MC |
3703 | return 0; |
3704 | } | |
3705 | ||
3706 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3707 | return 1; | |
3708 | } |