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846e33c7 | 1 | /* |
9d75dce3 | 2 | * Copyright 1995-2018 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 | * |
2c18d164 | 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
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> |
dee0cc10 | 14 | #include <assert.h> |
706457b7 DMSP |
15 | #include "../ssl_local.h" |
16 | #include "statem_local.h" | |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
dbad1690 | 21 | #include <openssl/md5.h> |
3c27208f | 22 | #include <openssl/dh.h> |
d095b68d | 23 | #include <openssl/bn.h> |
3c27208f | 24 | #include <openssl/engine.h> |
49b26f54 | 25 | #include <openssl/trace.h> |
4ff1a526 | 26 | #include <internal/cryptlib.h> |
f9b3bff6 | 27 | |
597c51bc | 28 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
29 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
30 | ||
7ab09630 | 31 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 32 | static int key_exchange_expected(SSL *s); |
d45ba43d | 33 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 34 | WPACKET *pkt); |
ea262260 | 35 | |
61ae935a MC |
36 | /* |
37 | * Is a CertificateRequest message allowed at the moment or not? | |
38 | * | |
39 | * Return values are: | |
40 | * 1: Yes | |
41 | * 0: No | |
42 | */ | |
7ab09630 | 43 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
44 | { |
45 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 46 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
47 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
48 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
49 | return 0; |
50 | ||
51 | return 1; | |
52 | } | |
53 | ||
54 | /* | |
a455d0f6 | 55 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
56 | * |
57 | * Return values are: | |
58 | * 1: Yes | |
59 | * 0: No | |
60 | */ | |
a455d0f6 | 61 | static int key_exchange_expected(SSL *s) |
61ae935a | 62 | { |
555cbb32 | 63 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
64 | |
65 | /* | |
66 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 67 | * ciphersuite or for SRP |
61ae935a | 68 | */ |
a455d0f6 MC |
69 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
70 | | SSL_kSRP)) { | |
71 | return 1; | |
61ae935a MC |
72 | } |
73 | ||
a455d0f6 | 74 | return 0; |
61ae935a MC |
75 | } |
76 | ||
0f1e51ea MC |
77 | /* |
78 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
79 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
80 | * server. The message type that the server has sent is provided in |mt|. The | |
81 | * current state is in |s->statem.hand_state|. | |
82 | * | |
94ed2c67 MC |
83 | * Return values are 1 for success (transition allowed) and 0 on error |
84 | * (transition not allowed) | |
0f1e51ea MC |
85 | */ |
86 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
87 | { | |
88 | OSSL_STATEM *st = &s->statem; | |
89 | ||
90 | /* | |
91 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
92 | * yet negotiated TLSv1.3 at that point so that is handled by | |
93 | * ossl_statem_client_read_transition() | |
94 | */ | |
95 | ||
96 | switch (st->hand_state) { | |
97 | default: | |
98 | break; | |
99 | ||
3847d426 MC |
100 | case TLS_ST_CW_CLNT_HELLO: |
101 | /* | |
102 | * This must a ClientHello following a HelloRetryRequest, so the only | |
103 | * thing we can get now is a ServerHello. | |
104 | */ | |
105 | if (mt == SSL3_MT_SERVER_HELLO) { | |
106 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
107 | return 1; | |
108 | } | |
109 | break; | |
110 | ||
0f1e51ea | 111 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
112 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
113 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
114 | return 1; | |
115 | } | |
116 | break; | |
117 | ||
118 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 119 | if (s->hit) { |
92760c21 MC |
120 | if (mt == SSL3_MT_FINISHED) { |
121 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
122 | return 1; |
123 | } | |
124 | } else { | |
92760c21 MC |
125 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
126 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
127 | return 1; | |
f5ca0b04 MC |
128 | } |
129 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
130 | st->hand_state = TLS_ST_CR_CERT; |
131 | return 1; | |
132 | } | |
133 | } | |
134 | break; | |
135 | ||
92760c21 MC |
136 | case TLS_ST_CR_CERT_REQ: |
137 | if (mt == SSL3_MT_CERTIFICATE) { | |
138 | st->hand_state = TLS_ST_CR_CERT; | |
139 | return 1; | |
140 | } | |
141 | break; | |
142 | ||
0f1e51ea | 143 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
144 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
145 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
146 | return 1; | |
147 | } | |
148 | break; | |
149 | ||
150 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
151 | if (mt == SSL3_MT_FINISHED) { |
152 | st->hand_state = TLS_ST_CR_FINISHED; | |
153 | return 1; | |
154 | } | |
155 | break; | |
cc2455bf MC |
156 | |
157 | case TLS_ST_OK: | |
158 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
159 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
160 | return 1; | |
161 | } | |
e1c3de44 MC |
162 | if (mt == SSL3_MT_KEY_UPDATE) { |
163 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
164 | return 1; | |
165 | } | |
9d75dce3 | 166 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 167 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
9d75dce3 TS |
168 | # error TODO(DTLS1.3): Restore digest for PHA before adding message. |
169 | #endif | |
170 | if (!SSL_IS_DTLS(s) && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
171 | s->post_handshake_auth = SSL_PHA_REQUESTED; | |
172 | /* | |
173 | * In TLS, this is called before the message is added to the | |
174 | * digest. In DTLS, this is expected to be called after adding | |
175 | * to the digest. Either move the digest restore, or add the | |
176 | * message here after the swap, or do it after the clientFinished? | |
177 | */ | |
178 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
179 | /* SSLfatal() already called */ | |
180 | return 0; | |
181 | } | |
182 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
183 | return 1; | |
184 | } | |
185 | } | |
cc2455bf | 186 | break; |
0f1e51ea MC |
187 | } |
188 | ||
0f1e51ea | 189 | /* No valid transition found */ |
0f1e51ea MC |
190 | return 0; |
191 | } | |
192 | ||
61ae935a | 193 | /* |
8481f583 MC |
194 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
195 | * handshake state transitions when the client is reading messages from the | |
196 | * server. The message type that the server has sent is provided in |mt|. The | |
197 | * current state is in |s->statem.hand_state|. | |
61ae935a | 198 | * |
94ed2c67 MC |
199 | * Return values are 1 for success (transition allowed) and 0 on error |
200 | * (transition not allowed) | |
61ae935a | 201 | */ |
8481f583 | 202 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 203 | { |
d6f1a6e9 | 204 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 205 | int ske_expected; |
61ae935a | 206 | |
0f1e51ea | 207 | /* |
3847d426 MC |
208 | * Note that after writing the first ClientHello we don't know what version |
209 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 210 | */ |
f5ca0b04 | 211 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
212 | if (!ossl_statem_client13_read_transition(s, mt)) |
213 | goto err; | |
214 | return 1; | |
215 | } | |
0f1e51ea | 216 | |
a230b26e | 217 | switch (st->hand_state) { |
f3b3d7f0 RS |
218 | default: |
219 | break; | |
220 | ||
61ae935a MC |
221 | case TLS_ST_CW_CLNT_HELLO: |
222 | if (mt == SSL3_MT_SERVER_HELLO) { | |
223 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
224 | return 1; | |
225 | } | |
226 | ||
227 | if (SSL_IS_DTLS(s)) { | |
228 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
229 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
230 | return 1; | |
231 | } | |
232 | } | |
233 | break; | |
234 | ||
d7f8783f | 235 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
236 | /* |
237 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
238 | * data. The only thing allowed now is a ServerHello or a | |
239 | * HelloRetryRequest. | |
240 | */ | |
241 | if (mt == SSL3_MT_SERVER_HELLO) { | |
242 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
243 | return 1; | |
244 | } | |
4004ce5f MC |
245 | break; |
246 | ||
61ae935a MC |
247 | case TLS_ST_CR_SRVR_HELLO: |
248 | if (s->hit) { | |
aff8c126 | 249 | if (s->ext.ticket_expected) { |
61ae935a MC |
250 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
251 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
252 | return 1; | |
253 | } | |
254 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
255 | st->hand_state = TLS_ST_CR_CHANGE; | |
256 | return 1; | |
257 | } | |
258 | } else { | |
259 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
260 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
261 | return 1; | |
ad3819c2 | 262 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
263 | && s->ext.session_secret_cb != NULL |
264 | && s->session->ext.tick != NULL | |
a230b26e | 265 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
266 | /* |
267 | * Normally, we can tell if the server is resuming the session | |
268 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
269 | * the next server message after the ServerHello to determine if | |
270 | * the server is resuming. | |
271 | */ | |
272 | s->hit = 1; | |
273 | st->hand_state = TLS_ST_CR_CHANGE; | |
274 | return 1; | |
555cbb32 | 275 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 276 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
277 | if (mt == SSL3_MT_CERTIFICATE) { |
278 | st->hand_state = TLS_ST_CR_CERT; | |
279 | return 1; | |
280 | } | |
281 | } else { | |
a455d0f6 | 282 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
283 | /* SKE is optional for some PSK ciphersuites */ |
284 | if (ske_expected | |
555cbb32 | 285 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 286 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
287 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
288 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
289 | return 1; | |
290 | } | |
291 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
292 | && cert_req_allowed(s)) { |
293 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
294 | return 1; | |
a455d0f6 | 295 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
296 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
297 | return 1; | |
61ae935a MC |
298 | } |
299 | } | |
300 | } | |
301 | break; | |
302 | ||
303 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
304 | /* |
305 | * The CertificateStatus message is optional even if | |
aff8c126 | 306 | * |ext.status_expected| is set |
bb1aaab4 | 307 | */ |
aff8c126 | 308 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
309 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
310 | return 1; | |
a455d0f6 MC |
311 | } |
312 | /* Fall through */ | |
313 | ||
314 | case TLS_ST_CR_CERT_STATUS: | |
315 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 316 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 317 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 318 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
319 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
320 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
321 | return 1; | |
61ae935a | 322 | } |
672f3337 | 323 | goto err; |
61ae935a | 324 | } |
a455d0f6 | 325 | /* Fall through */ |
61ae935a | 326 | |
a455d0f6 MC |
327 | case TLS_ST_CR_KEY_EXCH: |
328 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
329 | if (cert_req_allowed(s)) { | |
61ae935a MC |
330 | st->hand_state = TLS_ST_CR_CERT_REQ; |
331 | return 1; | |
61ae935a | 332 | } |
672f3337 | 333 | goto err; |
61ae935a | 334 | } |
a455d0f6 | 335 | /* Fall through */ |
61ae935a MC |
336 | |
337 | case TLS_ST_CR_CERT_REQ: | |
338 | if (mt == SSL3_MT_SERVER_DONE) { | |
339 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
340 | return 1; | |
341 | } | |
342 | break; | |
343 | ||
344 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 345 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
346 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
347 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
348 | return 1; | |
349 | } | |
61ae935a MC |
350 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
351 | st->hand_state = TLS_ST_CR_CHANGE; | |
352 | return 1; | |
353 | } | |
354 | break; | |
355 | ||
356 | case TLS_ST_CR_SESSION_TICKET: | |
357 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
358 | st->hand_state = TLS_ST_CR_CHANGE; | |
359 | return 1; | |
360 | } | |
361 | break; | |
362 | ||
363 | case TLS_ST_CR_CHANGE: | |
364 | if (mt == SSL3_MT_FINISHED) { | |
365 | st->hand_state = TLS_ST_CR_FINISHED; | |
366 | return 1; | |
367 | } | |
368 | break; | |
c7f47786 MC |
369 | |
370 | case TLS_ST_OK: | |
4004ce5f | 371 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
372 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
373 | return 1; | |
374 | } | |
375 | break; | |
61ae935a MC |
376 | } |
377 | ||
672f3337 | 378 | err: |
61ae935a | 379 | /* No valid transition found */ |
f20404fc MC |
380 | if (SSL_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
381 | BIO *rbio; | |
382 | ||
383 | /* | |
384 | * CCS messages don't have a message sequence number so this is probably | |
385 | * because of an out-of-order CCS. We'll just drop it. | |
386 | */ | |
387 | s->init_num = 0; | |
388 | s->rwstate = SSL_READING; | |
389 | rbio = SSL_get_rbio(s); | |
390 | BIO_clear_retry_flags(rbio); | |
391 | BIO_set_retry_read(rbio); | |
392 | return 0; | |
393 | } | |
f63a17d6 MC |
394 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
395 | SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, | |
396 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
397 | return 0; |
398 | } | |
399 | ||
400 | /* | |
0f1e51ea MC |
401 | * ossl_statem_client13_write_transition() works out what handshake state to |
402 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
403 | * server. | |
0f1e51ea MC |
404 | */ |
405 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
406 | { | |
407 | OSSL_STATEM *st = &s->statem; | |
408 | ||
409 | /* | |
3847d426 MC |
410 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
411 | * TLSv1.3 yet at that point. They are handled by | |
412 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
413 | */ |
414 | switch (st->hand_state) { | |
e43e6b19 TS |
415 | default: |
416 | /* Shouldn't happen */ | |
417 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
418 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
419 | ERR_R_INTERNAL_ERROR); | |
420 | return WRITE_TRAN_ERROR; | |
421 | ||
9d75dce3 TS |
422 | case TLS_ST_CR_CERT_REQ: |
423 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
424 | st->hand_state = TLS_ST_CW_CERT; | |
425 | return WRITE_TRAN_CONTINUE; | |
426 | } | |
1bf4cb0f MC |
427 | /* |
428 | * We should only get here if we received a CertificateRequest after | |
429 | * we already sent close_notify | |
430 | */ | |
431 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
432 | /* Shouldn't happen - same as default case */ | |
433 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
434 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
435 | ERR_R_INTERNAL_ERROR); | |
436 | return WRITE_TRAN_ERROR; | |
437 | } | |
438 | st->hand_state = TLS_ST_OK; | |
439 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 440 | |
92760c21 | 441 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
442 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
443 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 444 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 445 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 446 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 447 | st->hand_state = TLS_ST_CW_CHANGE; |
564547e4 | 448 | else |
555cbb32 | 449 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
564547e4 MC |
450 | : TLS_ST_CW_FINISHED; |
451 | return WRITE_TRAN_CONTINUE; | |
452 | ||
d7f8783f | 453 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
454 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
455 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
456 | return WRITE_TRAN_CONTINUE; | |
457 | } | |
458 | /* Fall through */ | |
459 | ||
460 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 461 | case TLS_ST_CW_CHANGE: |
555cbb32 | 462 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 463 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
464 | return WRITE_TRAN_CONTINUE; |
465 | ||
466 | case TLS_ST_CW_CERT: | |
467 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 468 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 469 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
470 | return WRITE_TRAN_CONTINUE; |
471 | ||
472 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
473 | st->hand_state = TLS_ST_CW_FINISHED; |
474 | return WRITE_TRAN_CONTINUE; | |
475 | ||
e1c3de44 | 476 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 477 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 478 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 479 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 480 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 481 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
482 | |
483 | case TLS_ST_OK: | |
9412b3ad MC |
484 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
485 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
486 | return WRITE_TRAN_CONTINUE; | |
487 | } | |
488 | ||
489 | /* Try to read from the server instead */ | |
cc2455bf | 490 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
491 | } |
492 | } | |
493 | ||
494 | /* | |
495 | * ossl_statem_client_write_transition() works out what handshake state to | |
496 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 497 | */ |
8481f583 | 498 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 499 | { |
d6f1a6e9 | 500 | OSSL_STATEM *st = &s->statem; |
61ae935a | 501 | |
0f1e51ea MC |
502 | /* |
503 | * Note that immediately before/after a ClientHello we don't know what | |
504 | * version we are going to negotiate yet, so we don't take this branch until | |
505 | * later | |
506 | */ | |
f5ca0b04 | 507 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
508 | return ossl_statem_client13_write_transition(s); |
509 | ||
a230b26e | 510 | switch (st->hand_state) { |
f3b3d7f0 RS |
511 | default: |
512 | /* Shouldn't happen */ | |
a2c2e000 MC |
513 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
514 | SSL_F_OSSL_STATEM_CLIENT_WRITE_TRANSITION, | |
515 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
516 | return WRITE_TRAN_ERROR; |
517 | ||
a230b26e | 518 | case TLS_ST_OK: |
c7f47786 MC |
519 | if (!s->renegotiate) { |
520 | /* | |
521 | * We haven't requested a renegotiation ourselves so we must have | |
522 | * received a message from the server. Better read it. | |
523 | */ | |
524 | return WRITE_TRAN_FINISHED; | |
525 | } | |
018fcbec BE |
526 | /* Renegotiation */ |
527 | /* fall thru */ | |
a230b26e EK |
528 | case TLS_ST_BEFORE: |
529 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
530 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 531 | |
a230b26e | 532 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
533 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
534 | /* | |
535 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
536 | * actually selected a version yet. | |
537 | */ | |
066904cc MC |
538 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
539 | st->hand_state = TLS_ST_CW_CHANGE; | |
540 | else | |
541 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
542 | return WRITE_TRAN_CONTINUE; |
543 | } | |
a230b26e EK |
544 | /* |
545 | * No transition at the end of writing because we don't know what | |
546 | * we will be sent | |
547 | */ | |
548 | return WRITE_TRAN_FINISHED; | |
61ae935a | 549 | |
597c51bc | 550 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
551 | /* |
552 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
553 | * CCS unless middlebox compat mode is off, or we already issued one | |
554 | * because we did early data. | |
555 | */ | |
556 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
557 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
558 | st->hand_state = TLS_ST_CW_CHANGE; | |
559 | else | |
560 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
561 | return WRITE_TRAN_CONTINUE; |
562 | ||
d7f8783f | 563 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
564 | return WRITE_TRAN_FINISHED; |
565 | ||
a230b26e EK |
566 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
567 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
568 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 569 | |
a230b26e | 570 | case TLS_ST_CR_SRVR_DONE: |
555cbb32 | 571 | if (s->s3.tmp.cert_req) |
a230b26e EK |
572 | st->hand_state = TLS_ST_CW_CERT; |
573 | else | |
61ae935a | 574 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 575 | return WRITE_TRAN_CONTINUE; |
61ae935a | 576 | |
a230b26e EK |
577 | case TLS_ST_CW_CERT: |
578 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
579 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 580 | |
a230b26e EK |
581 | case TLS_ST_CW_KEY_EXCH: |
582 | /* | |
583 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
584 | * sent, but no verify packet is sent | |
585 | */ | |
586 | /* | |
587 | * XXX: For now, we do not support client authentication in ECDH | |
588 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
589 | * need to skip the certificate verify message when client's | |
590 | * ECDH public key is sent inside the client certificate. | |
591 | */ | |
555cbb32 | 592 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
593 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
594 | } else { | |
61ae935a | 595 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 596 | } |
555cbb32 | 597 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
598 | st->hand_state = TLS_ST_CW_CHANGE; |
599 | } | |
600 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 601 | |
a230b26e EK |
602 | case TLS_ST_CW_CERT_VRFY: |
603 | st->hand_state = TLS_ST_CW_CHANGE; | |
604 | return WRITE_TRAN_CONTINUE; | |
605 | ||
606 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
607 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
608 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
609 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
610 | st->hand_state = TLS_ST_EARLY_DATA; |
611 | } else { | |
61ae935a | 612 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 613 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 614 | #else |
555cbb32 | 615 | if (!SSL_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
616 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
617 | else | |
618 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 619 | #endif |
066904cc | 620 | } |
a230b26e | 621 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
622 | |
623 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
624 | case TLS_ST_CW_NEXT_PROTO: |
625 | st->hand_state = TLS_ST_CW_FINISHED; | |
626 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
627 | #endif |
628 | ||
a230b26e EK |
629 | case TLS_ST_CW_FINISHED: |
630 | if (s->hit) { | |
631 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
632 | return WRITE_TRAN_CONTINUE; |
633 | } else { | |
634 | return WRITE_TRAN_FINISHED; | |
635 | } | |
61ae935a | 636 | |
a230b26e EK |
637 | case TLS_ST_CR_FINISHED: |
638 | if (s->hit) { | |
639 | st->hand_state = TLS_ST_CW_CHANGE; | |
640 | return WRITE_TRAN_CONTINUE; | |
641 | } else { | |
642 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
643 | return WRITE_TRAN_CONTINUE; |
644 | } | |
c7f47786 MC |
645 | |
646 | case TLS_ST_CR_HELLO_REQ: | |
647 | /* | |
648 | * If we can renegotiate now then do so, otherwise wait for a more | |
649 | * convenient time. | |
650 | */ | |
651 | if (ssl3_renegotiate_check(s, 1)) { | |
652 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 653 | /* SSLfatal() already called */ |
c7f47786 MC |
654 | return WRITE_TRAN_ERROR; |
655 | } | |
656 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
657 | return WRITE_TRAN_CONTINUE; | |
658 | } | |
659 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 660 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
661 | } |
662 | } | |
663 | ||
664 | /* | |
665 | * Perform any pre work that needs to be done prior to sending a message from | |
666 | * the client to the server. | |
667 | */ | |
8481f583 | 668 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 669 | { |
d6f1a6e9 | 670 | OSSL_STATEM *st = &s->statem; |
61ae935a | 671 | |
a230b26e | 672 | switch (st->hand_state) { |
f3b3d7f0 RS |
673 | default: |
674 | /* No pre work to be done */ | |
675 | break; | |
676 | ||
61ae935a MC |
677 | case TLS_ST_CW_CLNT_HELLO: |
678 | s->shutdown = 0; | |
679 | if (SSL_IS_DTLS(s)) { | |
680 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 681 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 682 | /* SSLfatal() already called */ |
2c4a056f MC |
683 | return WORK_ERROR; |
684 | } | |
61ae935a MC |
685 | } |
686 | break; | |
687 | ||
61ae935a MC |
688 | case TLS_ST_CW_CHANGE: |
689 | if (SSL_IS_DTLS(s)) { | |
690 | if (s->hit) { | |
691 | /* | |
692 | * We're into the last flight so we don't retransmit these | |
693 | * messages unless we need to. | |
694 | */ | |
695 | st->use_timer = 0; | |
696 | } | |
697 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
698 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
699 | /* Calls SSLfatal() as required */ | |
61ae935a | 700 | return dtls_wait_for_dry(s); |
a2c2e000 | 701 | } |
61ae935a MC |
702 | #endif |
703 | } | |
f3b3d7f0 | 704 | break; |
61ae935a | 705 | |
d7f8783f | 706 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
707 | /* |
708 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
709 | * attempt to write early data before calling SSL_read() then we press | |
710 | * on with the handshake. Otherwise we pause here. | |
711 | */ | |
712 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
713 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
714 | return WORK_FINISHED_CONTINUE; | |
715 | /* Fall through */ | |
716 | ||
717 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
718 | return tls_finish_handshake(s, wst, 0, 1); |
719 | ||
61ae935a | 720 | case TLS_ST_OK: |
a2c2e000 | 721 | /* Calls SSLfatal() as required */ |
2a8db717 | 722 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
723 | } |
724 | ||
725 | return WORK_FINISHED_CONTINUE; | |
726 | } | |
727 | ||
728 | /* | |
729 | * Perform any work that needs to be done after sending a message from the | |
730 | * client to the server. | |
731 | */ | |
8481f583 | 732 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 733 | { |
d6f1a6e9 | 734 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
735 | |
736 | s->init_num = 0; | |
737 | ||
a230b26e | 738 | switch (st->hand_state) { |
f3b3d7f0 RS |
739 | default: |
740 | /* No post work to be done */ | |
741 | break; | |
742 | ||
61ae935a | 743 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 744 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 745 | && s->max_early_data > 0) { |
6cb42265 MC |
746 | /* |
747 | * We haven't selected TLSv1.3 yet so we don't call the change | |
748 | * cipher state function associated with the SSL_METHOD. Instead | |
749 | * we call tls13_change_cipher_state() directly. | |
750 | */ | |
5cc807da | 751 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
752 | if (!tls13_change_cipher_state(s, |
753 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
754 | /* SSLfatal() already called */ | |
755 | return WORK_ERROR; | |
756 | } | |
a2c2e000 | 757 | } |
5cc807da MC |
758 | /* else we're in compat mode so we delay flushing until after CCS */ |
759 | } else if (!statem_flush(s)) { | |
760 | return WORK_MORE_A; | |
761 | } | |
762 | ||
763 | if (SSL_IS_DTLS(s)) { | |
764 | /* Treat the next message as the first packet */ | |
765 | s->first_packet = 1; | |
6cb42265 | 766 | } |
61ae935a MC |
767 | break; |
768 | ||
ef6c191b MC |
769 | case TLS_ST_CW_END_OF_EARLY_DATA: |
770 | /* | |
771 | * We set the enc_write_ctx back to NULL because we may end up writing | |
772 | * in cleartext again if we get a HelloRetryRequest from the server. | |
773 | */ | |
774 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
775 | s->enc_write_ctx = NULL; | |
776 | break; | |
777 | ||
61ae935a | 778 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
779 | if (tls_client_key_exchange_post_work(s) == 0) { |
780 | /* SSLfatal() already called */ | |
61ae935a | 781 | return WORK_ERROR; |
a2c2e000 | 782 | } |
61ae935a MC |
783 | break; |
784 | ||
785 | case TLS_ST_CW_CHANGE: | |
318d3c0e | 786 | if (SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING) |
4d02f870 | 787 | break; |
066904cc MC |
788 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
789 | && s->max_early_data > 0) { | |
790 | /* | |
791 | * We haven't selected TLSv1.3 yet so we don't call the change | |
792 | * cipher state function associated with the SSL_METHOD. Instead | |
793 | * we call tls13_change_cipher_state() directly. | |
794 | */ | |
795 | if (!tls13_change_cipher_state(s, | |
796 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
797 | return WORK_ERROR; | |
798 | break; | |
799 | } | |
555cbb32 | 800 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
801 | #ifdef OPENSSL_NO_COMP |
802 | s->session->compress_meth = 0; | |
803 | #else | |
555cbb32 | 804 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
805 | s->session->compress_meth = 0; |
806 | else | |
555cbb32 | 807 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 808 | #endif |
a2c2e000 MC |
809 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
810 | /* SSLfatal() already called */ | |
61ae935a | 811 | return WORK_ERROR; |
a2c2e000 | 812 | } |
61ae935a MC |
813 | |
814 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
815 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
816 | /* SSLfatal() already called */ | |
61ae935a | 817 | return WORK_ERROR; |
a2c2e000 | 818 | } |
61ae935a MC |
819 | |
820 | if (SSL_IS_DTLS(s)) { | |
821 | #ifndef OPENSSL_NO_SCTP | |
822 | if (s->hit) { | |
823 | /* | |
824 | * Change to new shared key of SCTP-Auth, will be ignored if | |
825 | * no SCTP used. | |
826 | */ | |
827 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
828 | 0, NULL); | |
829 | } | |
830 | #endif | |
831 | ||
832 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
833 | } | |
834 | break; | |
835 | ||
836 | case TLS_ST_CW_FINISHED: | |
837 | #ifndef OPENSSL_NO_SCTP | |
838 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
839 | /* | |
840 | * Change to new shared key of SCTP-Auth, will be ignored if | |
841 | * no SCTP used. | |
842 | */ | |
843 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
844 | 0, NULL); | |
845 | } | |
846 | #endif | |
847 | if (statem_flush(s) != 1) | |
848 | return WORK_MORE_B; | |
92760c21 MC |
849 | |
850 | if (SSL_IS_TLS13(s)) { | |
9d75dce3 | 851 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
852 | /* SSLfatal() already called */ |
853 | return WORK_ERROR; | |
854 | } | |
9d75dce3 TS |
855 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
856 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
857 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
858 | /* SSLfatal() already called */ | |
859 | return WORK_ERROR; | |
860 | } | |
861 | } | |
92760c21 | 862 | } |
61ae935a | 863 | break; |
9412b3ad MC |
864 | |
865 | case TLS_ST_CW_KEY_UPDATE: | |
866 | if (statem_flush(s) != 1) | |
867 | return WORK_MORE_A; | |
a2c2e000 MC |
868 | if (!tls13_update_key(s, 1)) { |
869 | /* SSLfatal() already called */ | |
57389a32 | 870 | return WORK_ERROR; |
a2c2e000 | 871 | } |
9412b3ad | 872 | break; |
61ae935a MC |
873 | } |
874 | ||
875 | return WORK_FINISHED_CONTINUE; | |
876 | } | |
877 | ||
878 | /* | |
6392fb8e MC |
879 | * Get the message construction function and message type for sending from the |
880 | * client | |
61ae935a MC |
881 | * |
882 | * Valid return values are: | |
883 | * 1: Success | |
884 | * 0: Error | |
885 | */ | |
6392fb8e | 886 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 887 | confunc_f *confunc, int *mt) |
61ae935a | 888 | { |
d6f1a6e9 | 889 | OSSL_STATEM *st = &s->statem; |
61ae935a | 890 | |
4a01c59f MC |
891 | switch (st->hand_state) { |
892 | default: | |
893 | /* Shouldn't happen */ | |
f63a17d6 MC |
894 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
895 | SSL_F_OSSL_STATEM_CLIENT_CONSTRUCT_MESSAGE, | |
896 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
897 | return 0; |
898 | ||
899 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 900 | if (SSL_IS_DTLS(s)) |
6392fb8e | 901 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 902 | else |
6392fb8e MC |
903 | *confunc = tls_construct_change_cipher_spec; |
904 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
905 | break; |
906 | ||
907 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
908 | *confunc = tls_construct_client_hello; |
909 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
910 | break; |
911 | ||
ef6c191b MC |
912 | case TLS_ST_CW_END_OF_EARLY_DATA: |
913 | *confunc = tls_construct_end_of_early_data; | |
914 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
915 | break; | |
916 | ||
917 | case TLS_ST_PENDING_EARLY_DATA_END: | |
918 | *confunc = NULL; | |
919 | *mt = SSL3_MT_DUMMY; | |
920 | break; | |
921 | ||
4a01c59f | 922 | case TLS_ST_CW_CERT: |
6392fb8e MC |
923 | *confunc = tls_construct_client_certificate; |
924 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
925 | break; |
926 | ||
927 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
928 | *confunc = tls_construct_client_key_exchange; |
929 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
930 | break; |
931 | ||
932 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 933 | *confunc = tls_construct_cert_verify; |
6392fb8e | 934 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 935 | break; |
61ae935a MC |
936 | |
937 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 938 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
939 | *confunc = tls_construct_next_proto; |
940 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 941 | break; |
61ae935a | 942 | #endif |
4a01c59f | 943 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
944 | *confunc = tls_construct_finished; |
945 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 946 | break; |
9412b3ad MC |
947 | |
948 | case TLS_ST_CW_KEY_UPDATE: | |
949 | *confunc = tls_construct_key_update; | |
950 | *mt = SSL3_MT_KEY_UPDATE; | |
951 | break; | |
4a01c59f | 952 | } |
5923ad4b | 953 | |
5923ad4b | 954 | return 1; |
61ae935a MC |
955 | } |
956 | ||
957 | /* | |
958 | * Returns the maximum allowed length for the current message that we are | |
959 | * reading. Excludes the message header. | |
960 | */ | |
eda75751 | 961 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 962 | { |
d6f1a6e9 | 963 | OSSL_STATEM *st = &s->statem; |
61ae935a | 964 | |
a230b26e | 965 | switch (st->hand_state) { |
f3b3d7f0 RS |
966 | default: |
967 | /* Shouldn't happen */ | |
968 | return 0; | |
969 | ||
a230b26e EK |
970 | case TLS_ST_CR_SRVR_HELLO: |
971 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 972 | |
a230b26e EK |
973 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
974 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 975 | |
a230b26e EK |
976 | case TLS_ST_CR_CERT: |
977 | return s->max_cert_list; | |
61ae935a | 978 | |
2c5dfdc3 MC |
979 | case TLS_ST_CR_CERT_VRFY: |
980 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
981 | ||
a230b26e EK |
982 | case TLS_ST_CR_CERT_STATUS: |
983 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 984 | |
a230b26e EK |
985 | case TLS_ST_CR_KEY_EXCH: |
986 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 987 | |
a230b26e EK |
988 | case TLS_ST_CR_CERT_REQ: |
989 | /* | |
990 | * Set to s->max_cert_list for compatibility with previous releases. In | |
991 | * practice these messages can get quite long if servers are configured | |
992 | * to provide a long list of acceptable CAs | |
993 | */ | |
994 | return s->max_cert_list; | |
61ae935a | 995 | |
a230b26e EK |
996 | case TLS_ST_CR_SRVR_DONE: |
997 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 998 | |
a230b26e EK |
999 | case TLS_ST_CR_CHANGE: |
1000 | if (s->version == DTLS1_BAD_VER) | |
1001 | return 3; | |
1002 | return CCS_MAX_LENGTH; | |
61ae935a | 1003 | |
a230b26e EK |
1004 | case TLS_ST_CR_SESSION_TICKET: |
1005 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1006 | |
a230b26e EK |
1007 | case TLS_ST_CR_FINISHED: |
1008 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1009 | |
1010 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1011 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1012 | |
1013 | case TLS_ST_CR_KEY_UPDATE: | |
1014 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1015 | } |
61ae935a MC |
1016 | } |
1017 | ||
1018 | /* | |
1019 | * Process a message that the client has been received from the server. | |
1020 | */ | |
8481f583 | 1021 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 1022 | { |
d6f1a6e9 | 1023 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1024 | |
a230b26e | 1025 | switch (st->hand_state) { |
f3b3d7f0 RS |
1026 | default: |
1027 | /* Shouldn't happen */ | |
a2c2e000 MC |
1028 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1029 | SSL_F_OSSL_STATEM_CLIENT_PROCESS_MESSAGE, | |
1030 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1031 | return MSG_PROCESS_ERROR; |
1032 | ||
a230b26e EK |
1033 | case TLS_ST_CR_SRVR_HELLO: |
1034 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1035 | |
a230b26e EK |
1036 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1037 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1038 | |
a230b26e EK |
1039 | case TLS_ST_CR_CERT: |
1040 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1041 | |
2c5dfdc3 MC |
1042 | case TLS_ST_CR_CERT_VRFY: |
1043 | return tls_process_cert_verify(s, pkt); | |
1044 | ||
a230b26e EK |
1045 | case TLS_ST_CR_CERT_STATUS: |
1046 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1047 | |
a230b26e EK |
1048 | case TLS_ST_CR_KEY_EXCH: |
1049 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1050 | |
a230b26e EK |
1051 | case TLS_ST_CR_CERT_REQ: |
1052 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1053 | |
a230b26e EK |
1054 | case TLS_ST_CR_SRVR_DONE: |
1055 | return tls_process_server_done(s, pkt); | |
61ae935a | 1056 | |
a230b26e EK |
1057 | case TLS_ST_CR_CHANGE: |
1058 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1059 | |
a230b26e EK |
1060 | case TLS_ST_CR_SESSION_TICKET: |
1061 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1062 | |
a230b26e EK |
1063 | case TLS_ST_CR_FINISHED: |
1064 | return tls_process_finished(s, pkt); | |
e46f2334 | 1065 | |
c7f47786 MC |
1066 | case TLS_ST_CR_HELLO_REQ: |
1067 | return tls_process_hello_req(s, pkt); | |
1068 | ||
e46f2334 MC |
1069 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1070 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1071 | |
1072 | case TLS_ST_CR_KEY_UPDATE: | |
1073 | return tls_process_key_update(s, pkt); | |
61ae935a | 1074 | } |
61ae935a MC |
1075 | } |
1076 | ||
1077 | /* | |
1078 | * Perform any further processing required following the receipt of a message | |
1079 | * from the server | |
1080 | */ | |
8481f583 | 1081 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1082 | { |
d6f1a6e9 | 1083 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1084 | |
a230b26e | 1085 | switch (st->hand_state) { |
f3b3d7f0 RS |
1086 | default: |
1087 | /* Shouldn't happen */ | |
a2c2e000 MC |
1088 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1089 | SSL_F_OSSL_STATEM_CLIENT_POST_PROCESS_MESSAGE, | |
1090 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1091 | return WORK_ERROR; |
1092 | ||
e4562014 | 1093 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1094 | case TLS_ST_CR_CERT_REQ: |
1095 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1096 | } |
61ae935a MC |
1097 | } |
1098 | ||
7cea05dc | 1099 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1100 | { |
2c7b4dbc | 1101 | unsigned char *p; |
ec60ccc1 MC |
1102 | size_t sess_id_len; |
1103 | int i, protverr; | |
09b6c2ef | 1104 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1105 | SSL_COMP *comp; |
1106 | #endif | |
b9908bf9 | 1107 | SSL_SESSION *sess = s->session; |
a5816a5a | 1108 | unsigned char *session_id; |
0f113f3e | 1109 | |
b9908bf9 | 1110 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1111 | protverr = ssl_set_client_hello_version(s); |
1112 | if (protverr != 0) { | |
f63a17d6 MC |
1113 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1114 | protverr); | |
7cea05dc | 1115 | return 0; |
4fa52141 | 1116 | } |
0f113f3e | 1117 | |
e586eac8 | 1118 | if (sess == NULL |
4fd12788 | 1119 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1120 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1121 | if (s->hello_retry_request == SSL_HRR_NONE |
1122 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1123 | /* SSLfatal() already called */ |
7cea05dc | 1124 | return 0; |
f63a17d6 | 1125 | } |
b9908bf9 MC |
1126 | } |
1127 | /* else use the pre-loaded session */ | |
0f113f3e | 1128 | |
555cbb32 | 1129 | p = s->s3.client_random; |
0f113f3e | 1130 | |
b9908bf9 MC |
1131 | /* |
1132 | * for DTLS if client_random is initialized, reuse it, we are | |
1133 | * required to use same upon reply to HelloVerify | |
1134 | */ | |
1135 | if (SSL_IS_DTLS(s)) { | |
1136 | size_t idx; | |
1137 | i = 1; | |
555cbb32 | 1138 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1139 | if (p[idx]) { |
1140 | i = 0; | |
1141 | break; | |
0f113f3e | 1142 | } |
0f113f3e | 1143 | } |
751b26b1 | 1144 | } else { |
fc7129dc | 1145 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1146 | } |
0f113f3e | 1147 | |
555cbb32 | 1148 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 MC |
1149 | DOWNGRADE_NONE) <= 0) { |
1150 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1151 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1152 | return 0; |
f63a17d6 | 1153 | } |
b9908bf9 | 1154 | |
b9908bf9 MC |
1155 | /*- |
1156 | * version indicates the negotiated version: for example from | |
1157 | * an SSLv2/v3 compatible client hello). The client_version | |
1158 | * field is the maximum version we permit and it is also | |
1159 | * used in RSA encrypted premaster secrets. Some servers can | |
1160 | * choke if we initially report a higher version then | |
1161 | * renegotiate to a lower one in the premaster secret. This | |
1162 | * didn't happen with TLS 1.0 as most servers supported it | |
1163 | * but it can with TLS 1.1 or later if the server only supports | |
1164 | * 1.0. | |
1165 | * | |
1166 | * Possible scenario with previous logic: | |
1167 | * 1. Client hello indicates TLS 1.2 | |
1168 | * 2. Server hello says TLS 1.0 | |
1169 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1170 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1171 | * 5. Server sends hello request to renegotiate. |
1172 | * 6. Client hello indicates TLS v1.0 as we now | |
1173 | * know that is maximum server supports. | |
1174 | * 7. Server chokes on RSA encrypted premaster secret | |
1175 | * containing version 1.0. | |
1176 | * | |
1177 | * For interoperability it should be OK to always use the | |
1178 | * maximum version we support in client hello and then rely | |
1179 | * on the checking of version to ensure the servers isn't | |
1180 | * being inconsistent: for example initially negotiating with | |
1181 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1182 | * client_version in client hello and not resetting it to | |
1183 | * the negotiated version. | |
cd998837 MC |
1184 | * |
1185 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1186 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1187 | */ |
7acb8b64 | 1188 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1189 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
1190 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1191 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1192 | return 0; |
2c7b4dbc | 1193 | } |
b9908bf9 MC |
1194 | |
1195 | /* Session ID */ | |
a5816a5a MC |
1196 | session_id = s->session->session_id; |
1197 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1198 | if (s->version == TLS1_3_VERSION | |
1199 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1200 | sess_id_len = sizeof(s->tmp_session_id); | |
1201 | s->tmp_session_id_len = sess_id_len; | |
1202 | session_id = s->tmp_session_id; | |
fc7129dc | 1203 | if (s->hello_retry_request == SSL_HRR_NONE |
16cfc2c9 | 1204 | && RAND_bytes(s->tmp_session_id, sess_id_len) <= 0) { |
a5816a5a MC |
1205 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1206 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1207 | ERR_R_INTERNAL_ERROR); | |
1208 | return 0; | |
1209 | } | |
1210 | } else { | |
1211 | sess_id_len = 0; | |
1212 | } | |
1213 | } else { | |
dee0cc10 | 1214 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1215 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1216 | if (s->version == TLS1_3_VERSION) { |
1217 | s->tmp_session_id_len = sess_id_len; | |
1218 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1219 | } | |
1220 | } | |
dee0cc10 | 1221 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1222 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1223 | sess_id_len)) |
7cea05dc | 1224 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1225 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1226 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1227 | return 0; |
b9908bf9 | 1228 | } |
0f113f3e | 1229 | |
b9908bf9 MC |
1230 | /* cookie stuff for DTLS */ |
1231 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1232 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1233 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1234 | s->d1->cookie_len)) { |
f63a17d6 MC |
1235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1236 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1237 | return 0; |
0f113f3e | 1238 | } |
b9908bf9 MC |
1239 | } |
1240 | ||
1241 | /* Ciphers supported */ | |
7cea05dc | 1242 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1244 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1245 | return 0; |
2c7b4dbc | 1246 | } |
635c8f77 | 1247 | |
f63a17d6 MC |
1248 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1249 | /* SSLfatal() already called */ | |
7cea05dc | 1250 | return 0; |
f63a17d6 | 1251 | } |
7cea05dc | 1252 | if (!WPACKET_close(pkt)) { |
f63a17d6 MC |
1253 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1254 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1255 | return 0; |
b9908bf9 | 1256 | } |
0f113f3e | 1257 | |
b9908bf9 | 1258 | /* COMPRESSION */ |
7cea05dc | 1259 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
f63a17d6 MC |
1260 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1261 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1262 | return 0; |
2c7b4dbc MC |
1263 | } |
1264 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1265 | if (ssl_allow_compression(s) |
1266 | && s->ctx->comp_methods | |
555cbb32 | 1267 | && (SSL_IS_DTLS(s) || s->s3.tmp.max_ver < TLS1_3_VERSION)) { |
2c7b4dbc MC |
1268 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1269 | for (i = 0; i < compnum; i++) { | |
1270 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1271 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
f63a17d6 MC |
1272 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1273 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1274 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1275 | return 0; |
2c7b4dbc MC |
1276 | } |
1277 | } | |
b9908bf9 | 1278 | } |
09b6c2ef | 1279 | #endif |
2c7b4dbc | 1280 | /* Add the NULL method */ |
7cea05dc | 1281 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1282 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1283 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1284 | return 0; |
2c7b4dbc | 1285 | } |
761772d7 | 1286 | |
b9908bf9 | 1287 | /* TLS extensions */ |
f63a17d6 MC |
1288 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1289 | /* SSLfatal() already called */ | |
7cea05dc | 1290 | return 0; |
b9908bf9 | 1291 | } |
0f113f3e | 1292 | |
b9908bf9 | 1293 | return 1; |
0f113f3e | 1294 | } |
d02b48c6 | 1295 | |
be3583fa | 1296 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1297 | { |
cb150cbc | 1298 | size_t cookie_len; |
8ba708e5 MC |
1299 | PACKET cookiepkt; |
1300 | ||
1301 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1302 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
f63a17d6 MC |
1303 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1304 | SSL_R_LENGTH_MISMATCH); | |
1305 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1306 | } |
1307 | ||
1308 | cookie_len = PACKET_remaining(&cookiepkt); | |
1309 | if (cookie_len > sizeof(s->d1->cookie)) { | |
f63a17d6 MC |
1310 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1311 | SSL_R_LENGTH_TOO_LONG); | |
1312 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1313 | } |
1314 | ||
1315 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
f63a17d6 MC |
1316 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1317 | SSL_R_LENGTH_MISMATCH); | |
1318 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1319 | } |
1320 | s->d1->cookie_len = cookie_len; | |
1321 | ||
1322 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1323 | } |
1324 | ||
11c67eea | 1325 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1326 | { |
1327 | STACK_OF(SSL_CIPHER) *sk; | |
1328 | const SSL_CIPHER *c; | |
11c67eea MC |
1329 | int i; |
1330 | ||
1331 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1332 | if (c == NULL) { | |
1333 | /* unknown cipher */ | |
f63a17d6 MC |
1334 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1335 | SSL_R_UNKNOWN_CIPHER_RETURNED); | |
11c67eea MC |
1336 | return 0; |
1337 | } | |
1338 | /* | |
1339 | * If it is a disabled cipher we either didn't send it in client hello, | |
1340 | * or it's not allowed for the selected protocol. So we return an error. | |
1341 | */ | |
8af91fd9 | 1342 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
f63a17d6 MC |
1343 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1344 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1345 | return 0; |
1346 | } | |
1347 | ||
1348 | sk = ssl_get_ciphers_by_id(s); | |
1349 | i = sk_SSL_CIPHER_find(sk, c); | |
1350 | if (i < 0) { | |
1351 | /* we did not say we would use this cipher */ | |
f63a17d6 MC |
1352 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1353 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1354 | return 0; |
1355 | } | |
1356 | ||
555cbb32 TS |
1357 | if (SSL_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
1358 | && s->s3.tmp.new_cipher->id != c->id) { | |
11c67eea | 1359 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
f63a17d6 MC |
1360 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1361 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1362 | return 0; |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * Depending on the session caching (internal/external), the cipher | |
1367 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1368 | * set and use it for comparison. | |
1369 | */ | |
1370 | if (s->session->cipher != NULL) | |
1371 | s->session->cipher_id = s->session->cipher->id; | |
1372 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1373 | if (SSL_IS_TLS13(s)) { |
1374 | /* | |
1375 | * In TLSv1.3 it is valid for the server to select a different | |
1376 | * ciphersuite as long as the hash is the same. | |
1377 | */ | |
1378 | if (ssl_md(c->algorithm2) | |
1379 | != ssl_md(s->session->cipher->algorithm2)) { | |
f63a17d6 MC |
1380 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1381 | SSL_F_SET_CLIENT_CIPHERSUITE, | |
1382 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
a055a881 MC |
1383 | return 0; |
1384 | } | |
1385 | } else { | |
1386 | /* | |
1387 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1388 | * ciphersuite. | |
1389 | */ | |
f63a17d6 MC |
1390 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1391 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
a055a881 MC |
1392 | return 0; |
1393 | } | |
11c67eea | 1394 | } |
555cbb32 | 1395 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1396 | |
1397 | return 1; | |
1398 | } | |
1399 | ||
1400 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1401 | { | |
332eb390 | 1402 | PACKET session_id, extpkt; |
b9908bf9 | 1403 | size_t session_id_len; |
b6981744 | 1404 | const unsigned char *cipherchars; |
597c51bc | 1405 | int hrr = 0; |
b9908bf9 | 1406 | unsigned int compression; |
4fa52141 | 1407 | unsigned int sversion; |
3434f40b | 1408 | unsigned int context; |
332eb390 | 1409 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1410 | #ifndef OPENSSL_NO_COMP |
1411 | SSL_COMP *comp; | |
1412 | #endif | |
1413 | ||
4fa52141 | 1414 | if (!PACKET_get_net_2(pkt, &sversion)) { |
f63a17d6 MC |
1415 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1416 | SSL_R_LENGTH_MISMATCH); | |
1417 | goto err; | |
4fa52141 | 1418 | } |
50932c4a | 1419 | |
c3043dcd | 1420 | /* load the server random */ |
597c51bc MC |
1421 | if (s->version == TLS1_3_VERSION |
1422 | && sversion == TLS1_2_VERSION | |
1423 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1424 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
fc7129dc MC |
1425 | s->hello_retry_request = SSL_HRR_PENDING; |
1426 | hrr = 1; | |
597c51bc MC |
1427 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
1428 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1429 | SSL_R_LENGTH_MISMATCH); | |
1430 | goto err; | |
1431 | } | |
1432 | } else { | |
555cbb32 | 1433 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
597c51bc MC |
1434 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1435 | SSL_R_LENGTH_MISMATCH); | |
1436 | goto err; | |
1437 | } | |
c3043dcd MC |
1438 | } |
1439 | ||
88050dd1 MC |
1440 | /* Get the session-id. */ |
1441 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1442 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1443 | SSL_R_LENGTH_MISMATCH); | |
f63a17d6 | 1444 | goto err; |
0f113f3e | 1445 | } |
88050dd1 MC |
1446 | session_id_len = PACKET_remaining(&session_id); |
1447 | if (session_id_len > sizeof(s->session->session_id) | |
1448 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1449 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1450 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
f63a17d6 | 1451 | goto err; |
524420d8 MC |
1452 | } |
1453 | ||
73999b62 | 1454 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1455 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1456 | SSL_R_LENGTH_MISMATCH); | |
1457 | goto err; | |
fc5ce51d EK |
1458 | } |
1459 | ||
88050dd1 MC |
1460 | if (!PACKET_get_1(pkt, &compression)) { |
1461 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1462 | SSL_R_LENGTH_MISMATCH); | |
1463 | goto err; | |
4ff65f77 MC |
1464 | } |
1465 | ||
1466 | /* TLS extensions */ | |
597c51bc | 1467 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1468 | PACKET_null_init(&extpkt); |
26b9172a MC |
1469 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1470 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1471 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1472 | SSL_R_BAD_LENGTH); | |
1473 | goto err; | |
4ff65f77 MC |
1474 | } |
1475 | ||
597c51bc MC |
1476 | if (!hrr) { |
1477 | if (!tls_collect_extensions(s, &extpkt, | |
1478 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1479 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1480 | &extensions, NULL, 1)) { | |
1481 | /* SSLfatal() already called */ | |
1482 | goto err; | |
1483 | } | |
1484 | ||
1485 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1486 | /* SSLfatal() already called */ | |
1487 | goto err; | |
1488 | } | |
88050dd1 MC |
1489 | } |
1490 | ||
597c51bc MC |
1491 | if (SSL_IS_TLS13(s) || hrr) { |
1492 | if (compression != 0) { | |
1493 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1494 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1495 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1496 | goto err; | |
1497 | } | |
1498 | ||
1499 | if (session_id_len != s->tmp_session_id_len | |
1500 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1501 | session_id_len) != 0) { | |
1502 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1503 | SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INVALID_SESSION_ID); | |
1504 | goto err; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | if (hrr) { | |
1509 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1510 | /* SSLfatal() already called */ | |
1511 | goto err; | |
1512 | } | |
1513 | ||
1514 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1515 | } |
1516 | ||
1517 | /* | |
1518 | * Now we have chosen the version we need to check again that the extensions | |
1519 | * are appropriate for this version. | |
1520 | */ | |
fe874d27 MC |
1521 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1522 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 MC |
1523 | if (!tls_validate_all_contexts(s, context, extensions)) { |
1524 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1525 | SSL_R_BAD_EXTENSION); | |
1526 | goto err; | |
1527 | } | |
1528 | ||
4ff65f77 MC |
1529 | s->hit = 0; |
1530 | ||
1531 | if (SSL_IS_TLS13(s)) { | |
a5816a5a MC |
1532 | /* |
1533 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1534 | * the message must be on a record boundary. | |
1535 | */ | |
1536 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1537 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
1538 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1539 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1540 | goto err; | |
1541 | } | |
1542 | ||
4ff65f77 MC |
1543 | /* This will set s->hit if we are resuming */ |
1544 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1545 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1546 | extensions, NULL, 0)) { |
f63a17d6 MC |
1547 | /* SSLfatal() already called */ |
1548 | goto err; | |
1549 | } | |
4ff65f77 | 1550 | } else { |
8c1a5343 | 1551 | /* |
4ff65f77 MC |
1552 | * Check if we can resume the session based on external pre-shared |
1553 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1554 | * Resumption based on server-side state works with session IDs. | |
1555 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1556 | * works by overriding the SessionTicket extension at the application | |
1557 | * layer, and does not send a session ID. (We do not know whether | |
1558 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1559 | * ID alone is not a reliable indicator of session resumption, so we | |
1560 | * first check if we can resume, and later peek at the next handshake | |
1561 | * message to see if the server wants to resume. | |
8c1a5343 | 1562 | */ |
4ff65f77 MC |
1563 | if (s->version >= TLS1_VERSION |
1564 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1565 | const SSL_CIPHER *pref_cipher = NULL; | |
1566 | /* | |
1567 | * s->session->master_key_length is a size_t, but this is an int for | |
1568 | * backwards compat reasons | |
1569 | */ | |
1570 | int master_key_length; | |
1571 | master_key_length = sizeof(s->session->master_key); | |
1572 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1573 | &master_key_length, | |
1574 | NULL, &pref_cipher, | |
1575 | s->ext.session_secret_cb_arg) | |
1576 | && master_key_length > 0) { | |
1577 | s->session->master_key_length = master_key_length; | |
1578 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1579 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1580 | } else { |
f63a17d6 MC |
1581 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1582 | SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1583 | goto err; | |
4ff65f77 | 1584 | } |
0f113f3e | 1585 | } |
4ff65f77 MC |
1586 | |
1587 | if (session_id_len != 0 | |
1588 | && session_id_len == s->session->session_id_length | |
1589 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1590 | session_id_len) == 0) | |
1591 | s->hit = 1; | |
50932c4a MC |
1592 | } |
1593 | ||
4ff65f77 | 1594 | if (s->hit) { |
0f113f3e | 1595 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1596 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1597 | /* actually a client application bug */ |
f63a17d6 MC |
1598 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1599 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1600 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1601 | goto err; | |
0f113f3e | 1602 | } |
6e3d0153 | 1603 | } else { |
0f113f3e | 1604 | /* |
6e3d0153 | 1605 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1606 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1607 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1608 | * so the PAC-based session secret is always preserved. It'll be | |
1609 | * overwritten if the server refuses resumption. | |
0f113f3e | 1610 | */ |
c96ce52c | 1611 | if (s->session->session_id_length > 0) { |
9ef9088c | 1612 | tsan_counter(&s->session_ctx->stats.sess_miss); |
0f113f3e | 1613 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1614 | /* SSLfatal() already called */ |
1615 | goto err; | |
0f113f3e MC |
1616 | } |
1617 | } | |
50932c4a | 1618 | |
ccae4a15 | 1619 | s->session->ssl_version = s->version; |
a5816a5a MC |
1620 | /* |
1621 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1622 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1623 | * echo of what we originally sent in the ClientHello and should not be | |
1624 | * used for resumption. | |
1625 | */ | |
1626 | if (!SSL_IS_TLS13(s)) { | |
1627 | s->session->session_id_length = session_id_len; | |
1628 | /* session_id_len could be 0 */ | |
1629 | if (session_id_len > 0) | |
1630 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1631 | session_id_len); | |
1632 | } | |
0f113f3e | 1633 | } |
fc5ce51d | 1634 | |
ccae4a15 FI |
1635 | /* Session version and negotiated protocol version should match */ |
1636 | if (s->version != s->session->ssl_version) { | |
f63a17d6 MC |
1637 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1638 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1639 | goto err; | |
ccae4a15 | 1640 | } |
0f113f3e | 1641 | /* |
3eb2aff4 KR |
1642 | * Now that we know the version, update the check to see if it's an allowed |
1643 | * version. | |
1644 | */ | |
555cbb32 TS |
1645 | s->s3.tmp.min_ver = s->version; |
1646 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1647 | |
11c67eea | 1648 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1649 | /* SSLfatal() already called */ |
1650 | goto err; | |
0f113f3e MC |
1651 | } |
1652 | ||
09b6c2ef | 1653 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1654 | if (compression != 0) { |
f63a17d6 MC |
1655 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1656 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1657 | goto err; | |
0f113f3e MC |
1658 | } |
1659 | /* | |
1660 | * If compression is disabled we'd better not try to resume a session | |
1661 | * using compression. | |
1662 | */ | |
1663 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
1664 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1665 | SSL_R_INCONSISTENT_COMPRESSION); | |
1666 | goto err; | |
0f113f3e | 1667 | } |
09b6c2ef | 1668 | #else |
fc5ce51d | 1669 | if (s->hit && compression != s->session->compress_meth) { |
f63a17d6 | 1670 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
dd5a4279 | 1671 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1672 | goto err; |
0f113f3e | 1673 | } |
fc5ce51d | 1674 | if (compression == 0) |
0f113f3e MC |
1675 | comp = NULL; |
1676 | else if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1677 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1678 | SSL_R_COMPRESSION_DISABLED); | |
1679 | goto err; | |
fc5ce51d EK |
1680 | } else { |
1681 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1682 | } | |
0f113f3e | 1683 | |
fc5ce51d | 1684 | if (compression != 0 && comp == NULL) { |
f63a17d6 MC |
1685 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1686 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1687 | goto err; | |
0f113f3e | 1688 | } else { |
555cbb32 | 1689 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1690 | } |
09b6c2ef | 1691 | #endif |
761772d7 | 1692 | |
f63a17d6 MC |
1693 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1694 | /* SSLfatal() already called */ | |
1695 | goto err; | |
1696 | } | |
332eb390 | 1697 | |
8723588e MC |
1698 | #ifndef OPENSSL_NO_SCTP |
1699 | if (SSL_IS_DTLS(s) && s->hit) { | |
1700 | unsigned char sctpauthkey[64]; | |
1701 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1702 | size_t labellen; |
8723588e MC |
1703 | |
1704 | /* | |
1705 | * Add new shared key for SCTP-Auth, will be ignored if | |
1706 | * no SCTP used. | |
1707 | */ | |
141eb8c6 MC |
1708 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1709 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1710 | |
09d62b33 MT |
1711 | /* Don't include the terminating zero. */ |
1712 | labellen = sizeof(labelbuffer) - 1; | |
1713 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1714 | labellen += 1; | |
1715 | ||
8723588e | 1716 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e EK |
1717 | sizeof(sctpauthkey), |
1718 | labelbuffer, | |
09d62b33 | 1719 | labellen, NULL, 0, 0) <= 0) { |
f63a17d6 MC |
1720 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1721 | ERR_R_INTERNAL_ERROR); | |
1722 | goto err; | |
1723 | } | |
8723588e MC |
1724 | |
1725 | BIO_ctrl(SSL_get_wbio(s), | |
1726 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1727 | sizeof(sctpauthkey), sctpauthkey); | |
1728 | } | |
1729 | #endif | |
1730 | ||
92760c21 MC |
1731 | /* |
1732 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1733 | * we're done with this message | |
1734 | */ | |
1735 | if (SSL_IS_TLS13(s) | |
1736 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1737 | || !s->method->ssl3_enc->change_cipher_state(s, |
1738 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1739 | /* SSLfatal() already called */ |
1740 | goto err; | |
92760c21 MC |
1741 | } |
1742 | ||
1b0286a3 | 1743 | OPENSSL_free(extensions); |
b9908bf9 | 1744 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1745 | err: |
1b0286a3 | 1746 | OPENSSL_free(extensions); |
b9908bf9 | 1747 | return MSG_PROCESS_ERROR; |
0f113f3e | 1748 | } |
d02b48c6 | 1749 | |
597c51bc MC |
1750 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, |
1751 | PACKET *extpkt) | |
3847d426 | 1752 | { |
3847d426 | 1753 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1754 | |
d4504fe5 MC |
1755 | /* |
1756 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1757 | * should not be used. | |
1758 | */ | |
1759 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1760 | s->enc_write_ctx = NULL; | |
1761 | ||
597c51bc | 1762 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1763 | &extensions, NULL, 1) |
fe874d27 | 1764 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1765 | extensions, NULL, 0, 1)) { |
1766 | /* SSLfatal() already called */ | |
1767 | goto err; | |
1768 | } | |
3847d426 MC |
1769 | |
1770 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1771 | extensions = NULL; |
1772 | ||
f5d270ca BK |
1773 | if (s->ext.tls13_cookie_len == 0 |
1774 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
555cbb32 | 1775 | && s->s3.tmp.pkey != NULL |
f5d270ca BK |
1776 | #endif |
1777 | ) { | |
66d4bf6b MC |
1778 | /* |
1779 | * We didn't receive a cookie or a new key_share so the next | |
1780 | * ClientHello will not change | |
1781 | */ | |
f63a17d6 | 1782 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
597c51bc MC |
1783 | SSL_F_TLS_PROCESS_AS_HELLO_RETRY_REQUEST, |
1784 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
f63a17d6 | 1785 | goto err; |
66d4bf6b | 1786 | } |
3847d426 | 1787 | |
11c67eea MC |
1788 | /* |
1789 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1790 | * a synthetic message_hash in place of ClientHello1. | |
1791 | */ | |
43054d3d | 1792 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1793 | /* SSLfatal() already called */ |
1794 | goto err; | |
11c67eea MC |
1795 | } |
1796 | ||
1797 | /* | |
1798 | * Add this message to the Transcript Hash. Normally this is done | |
1799 | * automatically prior to the message processing stage. However due to the | |
1800 | * need to create the synthetic message hash, we defer that step until now | |
1801 | * for HRR messages. | |
1802 | */ | |
1803 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1804 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1805 | /* SSLfatal() already called */ |
1806 | goto err; | |
11c67eea MC |
1807 | } |
1808 | ||
3847d426 | 1809 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1810 | err: |
3847d426 MC |
1811 | OPENSSL_free(extensions); |
1812 | return MSG_PROCESS_ERROR; | |
1813 | } | |
1814 | ||
be3583fa | 1815 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1816 | { |
f63a17d6 | 1817 | int i; |
eb5fd03b | 1818 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
b9908bf9 MC |
1819 | unsigned long cert_list_len, cert_len; |
1820 | X509 *x = NULL; | |
b6981744 | 1821 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1822 | STACK_OF(X509) *sk = NULL; |
1823 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1824 | size_t chainidx, certidx; |
e96e0f8e | 1825 | unsigned int context = 0; |
7f6b466b | 1826 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1827 | |
1828 | if ((sk = sk_X509_new_null()) == NULL) { | |
f63a17d6 MC |
1829 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1830 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1831 | goto err; |
0f113f3e MC |
1832 | } |
1833 | ||
e96e0f8e MC |
1834 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1835 | || context != 0 | |
1836 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1837 | || PACKET_remaining(pkt) != cert_list_len |
1838 | || PACKET_remaining(pkt) == 0) { | |
f63a17d6 MC |
1839 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1840 | SSL_R_LENGTH_MISMATCH); | |
1841 | goto err; | |
0f113f3e | 1842 | } |
d805a57b | 1843 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1844 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1845 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
f63a17d6 MC |
1846 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1847 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1848 | SSL_R_CERT_LENGTH_MISMATCH); | |
1849 | goto err; | |
0f113f3e MC |
1850 | } |
1851 | ||
df758a85 MC |
1852 | certstart = certbytes; |
1853 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e | 1854 | if (x == NULL) { |
f63a17d6 MC |
1855 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, |
1856 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1857 | goto err; | |
0f113f3e | 1858 | } |
df758a85 | 1859 | if (certbytes != (certstart + cert_len)) { |
f63a17d6 MC |
1860 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1861 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1862 | SSL_R_CERT_LENGTH_MISMATCH); | |
1863 | goto err; | |
0f113f3e | 1864 | } |
e96e0f8e MC |
1865 | |
1866 | if (SSL_IS_TLS13(s)) { | |
1867 | RAW_EXTENSION *rawexts = NULL; | |
1868 | PACKET extensions; | |
1869 | ||
1870 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
1871 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1872 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1873 | SSL_R_BAD_LENGTH); | |
1874 | goto err; | |
e96e0f8e | 1875 | } |
fe874d27 MC |
1876 | if (!tls_collect_extensions(s, &extensions, |
1877 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1878 | NULL, chainidx == 0) |
8e1634ec | 1879 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1880 | rawexts, x, chainidx, |
8e1634ec | 1881 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1882 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1883 | /* SSLfatal already called */ |
1884 | goto err; | |
5ee289ea MC |
1885 | } |
1886 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1887 | } |
1888 | ||
0f113f3e | 1889 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
1890 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1891 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1892 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1893 | goto err; |
0f113f3e MC |
1894 | } |
1895 | x = NULL; | |
0f113f3e MC |
1896 | } |
1897 | ||
1898 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1899 | /* |
1900 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1901 | * for client side verification of the server certificate to take place. | |
1902 | * However, historically the code has only checked that *any* flag is set | |
1903 | * to cause server verification to take place. Use of the other flags makes | |
1904 | * no sense in client mode. An attempt to clean up the semantics was | |
1905 | * reverted because at least one application *only* set | |
1906 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1907 | * server verification to take place, after the clean up it silently did | |
1908 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1909 | * sent to them because they are void functions. Therefore, we now use the | |
1910 | * (less clean) historic behaviour of performing validation if any flag is | |
1911 | * set. The *documented* interface remains the same. | |
1912 | */ | |
1913 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
c6d38183 | 1914 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 MC |
1915 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1916 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1917 | goto err; | |
0f113f3e MC |
1918 | } |
1919 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1920 | if (i > 1) { | |
f63a17d6 MC |
1921 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1922 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); | |
1923 | goto err; | |
0f113f3e MC |
1924 | } |
1925 | ||
c34b0f99 | 1926 | s->session->peer_chain = sk; |
0f113f3e MC |
1927 | /* |
1928 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1929 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1930 | */ |
1931 | x = sk_X509_value(sk, 0); | |
1932 | sk = NULL; | |
0f113f3e | 1933 | |
8382fd3a | 1934 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1935 | |
55a9a16f | 1936 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1937 | x = NULL; |
f63a17d6 MC |
1938 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1939 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1940 | goto err; | |
0f113f3e MC |
1941 | } |
1942 | ||
7f6b466b | 1943 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e | 1944 | x = NULL; |
f63a17d6 MC |
1945 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1946 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1947 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1948 | goto err; | |
0f113f3e | 1949 | } |
05b8486e DSH |
1950 | /* |
1951 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1952 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1953 | * type. | |
1954 | */ | |
1955 | if (!SSL_IS_TLS13(s)) { | |
555cbb32 | 1956 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e | 1957 | x = NULL; |
f63a17d6 MC |
1958 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1959 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1960 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1961 | goto err; | |
05b8486e | 1962 | } |
0f113f3e | 1963 | } |
7f6b466b | 1964 | s->session->peer_type = certidx; |
55a9a16f MC |
1965 | |
1966 | X509_free(s->session->peer); | |
05f0fb9f | 1967 | X509_up_ref(x); |
55a9a16f | 1968 | s->session->peer = x; |
0f113f3e | 1969 | s->session->verify_result = s->verify_result; |
0f113f3e | 1970 | x = NULL; |
2c5dfdc3 MC |
1971 | |
1972 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1973 | if (SSL_IS_TLS13(s) | |
1974 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1975 | sizeof(s->cert_verify_hash), | |
1976 | &s->cert_verify_hash_len)) { | |
f63a17d6 MC |
1977 | /* SSLfatal() already called */; |
1978 | goto err; | |
2c5dfdc3 MC |
1979 | } |
1980 | ||
b9908bf9 | 1981 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 1982 | |
cc273a93 | 1983 | err: |
0f113f3e MC |
1984 | X509_free(x); |
1985 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1986 | return ret; |
0f113f3e | 1987 | } |
d02b48c6 | 1988 | |
a2c2e000 | 1989 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
1990 | { |
1991 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1992 | PACKET psk_identity_hint; |
02a74590 | 1993 | |
7dc1c647 MC |
1994 | /* PSK ciphersuites are preceded by an identity hint */ |
1995 | ||
1996 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
a2c2e000 MC |
1997 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1998 | SSL_R_LENGTH_MISMATCH); | |
7dc1c647 MC |
1999 | return 0; |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Store PSK identity hint for later use, hint is used in | |
2004 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2005 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2006 | * identity. | |
2007 | */ | |
2008 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2009 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2010 | SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, | |
2011 | SSL_R_DATA_LENGTH_TOO_LONG); | |
7dc1c647 MC |
2012 | return 0; |
2013 | } | |
02a74590 | 2014 | |
7dc1c647 MC |
2015 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2016 | OPENSSL_free(s->session->psk_identity_hint); | |
2017 | s->session->psk_identity_hint = NULL; | |
2018 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2019 | &s->session->psk_identity_hint)) { |
a2c2e000 MC |
2020 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2021 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 MC |
2022 | return 0; |
2023 | } | |
2024 | ||
2025 | return 1; | |
2026 | #else | |
a2c2e000 MC |
2027 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2028 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 | 2029 | return 0; |
02a74590 MC |
2030 | #endif |
2031 | } | |
2032 | ||
a2c2e000 | 2033 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2034 | { |
2035 | #ifndef OPENSSL_NO_SRP | |
2036 | PACKET prime, generator, salt, server_pub; | |
2037 | ||
2038 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2039 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2040 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2041 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
a2c2e000 MC |
2042 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2043 | SSL_R_LENGTH_MISMATCH); | |
25c6c10c MC |
2044 | return 0; |
2045 | } | |
2046 | ||
348240c6 | 2047 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
2048 | if ((s->srp_ctx.N = |
2049 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2050 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2051 | || (s->srp_ctx.g = |
2052 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2053 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2054 | || (s->srp_ctx.s = |
2055 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2056 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2057 | || (s->srp_ctx.B = |
2058 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2059 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
a2c2e000 MC |
2060 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2061 | ERR_R_BN_LIB); | |
25c6c10c MC |
2062 | return 0; |
2063 | } | |
2064 | ||
a2c2e000 MC |
2065 | if (!srp_verify_server_param(s)) { |
2066 | /* SSLfatal() already called */ | |
25c6c10c MC |
2067 | return 0; |
2068 | } | |
2069 | ||
2070 | /* We must check if there is a certificate */ | |
555cbb32 | 2071 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2072 | *pkey = X509_get0_pubkey(s->session->peer); |
2073 | ||
2074 | return 1; | |
2075 | #else | |
a2c2e000 MC |
2076 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2077 | ERR_R_INTERNAL_ERROR); | |
25c6c10c MC |
2078 | return 0; |
2079 | #endif | |
2080 | } | |
2081 | ||
a2c2e000 | 2082 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d MC |
2083 | { |
2084 | #ifndef OPENSSL_NO_DH | |
2085 | PACKET prime, generator, pub_key; | |
2086 | EVP_PKEY *peer_tmp = NULL; | |
2087 | ||
2088 | DH *dh = NULL; | |
2089 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
2090 | ||
26505153 RL |
2091 | int check_bits = 0; |
2092 | ||
e01a610d MC |
2093 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2094 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2095 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
a2c2e000 MC |
2096 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2097 | SSL_R_LENGTH_MISMATCH); | |
e01a610d MC |
2098 | return 0; |
2099 | } | |
2100 | ||
2101 | peer_tmp = EVP_PKEY_new(); | |
2102 | dh = DH_new(); | |
2103 | ||
2104 | if (peer_tmp == NULL || dh == NULL) { | |
a2c2e000 MC |
2105 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2106 | ERR_R_MALLOC_FAILURE); | |
e01a610d MC |
2107 | goto err; |
2108 | } | |
2109 | ||
348240c6 MC |
2110 | /* TODO(size_t): Convert these calls */ |
2111 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2112 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2113 | NULL); | |
2114 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2115 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2116 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
a2c2e000 MC |
2117 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2118 | ERR_R_BN_LIB); | |
e01a610d MC |
2119 | goto err; |
2120 | } | |
2121 | ||
69687aa8 | 2122 | /* test non-zero pubkey */ |
26505153 | 2123 | if (BN_is_zero(bnpub_key)) { |
a2c2e000 MC |
2124 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2125 | SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2126 | goto err; |
2127 | } | |
2128 | ||
2129 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
a2c2e000 MC |
2130 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2131 | ERR_R_BN_LIB); | |
e01a610d MC |
2132 | goto err; |
2133 | } | |
2134 | p = g = NULL; | |
2135 | ||
26505153 | 2136 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
a2c2e000 MC |
2137 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2138 | SSL_R_BAD_DH_VALUE); | |
26505153 RL |
2139 | goto err; |
2140 | } | |
2141 | ||
e01a610d | 2142 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
a2c2e000 MC |
2143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2144 | ERR_R_BN_LIB); | |
e01a610d MC |
2145 | goto err; |
2146 | } | |
2147 | bnpub_key = NULL; | |
2148 | ||
2149 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
a2c2e000 MC |
2150 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SKE_DHE, |
2151 | SSL_R_DH_KEY_TOO_SMALL); | |
e01a610d MC |
2152 | goto err; |
2153 | } | |
2154 | ||
2155 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
a2c2e000 MC |
2156 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2157 | ERR_R_EVP_LIB); | |
e01a610d MC |
2158 | goto err; |
2159 | } | |
2160 | ||
555cbb32 | 2161 | s->s3.peer_tmp = peer_tmp; |
e01a610d MC |
2162 | |
2163 | /* | |
2164 | * FIXME: This makes assumptions about which ciphersuites come with | |
2165 | * public keys. We should have a less ad-hoc way of doing this | |
2166 | */ | |
555cbb32 | 2167 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2168 | *pkey = X509_get0_pubkey(s->session->peer); |
2169 | /* else anonymous DH, so no certificate or pkey. */ | |
2170 | ||
2171 | return 1; | |
2172 | ||
2173 | err: | |
2174 | BN_free(p); | |
2175 | BN_free(g); | |
2176 | BN_free(bnpub_key); | |
2177 | DH_free(dh); | |
2178 | EVP_PKEY_free(peer_tmp); | |
2179 | ||
2180 | return 0; | |
2181 | #else | |
a2c2e000 MC |
2182 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2183 | ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2184 | return 0; |
2185 | #endif | |
2186 | } | |
2187 | ||
a2c2e000 | 2188 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 MC |
2189 | { |
2190 | #ifndef OPENSSL_NO_EC | |
2191 | PACKET encoded_pt; | |
6447e818 | 2192 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2193 | |
2194 | /* | |
2195 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2196 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2197 | * ECParameters in this case is just three bytes. |
2198 | */ | |
6447e818 | 2199 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
a2c2e000 MC |
2200 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2201 | SSL_R_LENGTH_TOO_SHORT); | |
ff74aeb1 MC |
2202 | return 0; |
2203 | } | |
2204 | /* | |
6447e818 DSH |
2205 | * Check curve is named curve type and one of our preferences, if not |
2206 | * server has sent an invalid curve. | |
ff74aeb1 | 2207 | */ |
dcf8b01f MC |
2208 | if (curve_type != NAMED_CURVE_TYPE |
2209 | || !tls1_check_group_id(s, curve_id, 1)) { | |
a2c2e000 MC |
2210 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2211 | SSL_R_WRONG_CURVE); | |
ff74aeb1 MC |
2212 | return 0; |
2213 | } | |
2214 | ||
555cbb32 | 2215 | if ((s->s3.peer_tmp = ssl_generate_param_group(curve_id)) == NULL) { |
a2c2e000 MC |
2216 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2217 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
ff74aeb1 MC |
2218 | return 0; |
2219 | } | |
2220 | ||
ff74aeb1 | 2221 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
a2c2e000 MC |
2222 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2223 | SSL_R_LENGTH_MISMATCH); | |
ff74aeb1 MC |
2224 | return 0; |
2225 | } | |
2226 | ||
555cbb32 | 2227 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3.peer_tmp, |
ec24630a DSH |
2228 | PACKET_data(&encoded_pt), |
2229 | PACKET_remaining(&encoded_pt))) { | |
a2c2e000 MC |
2230 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2231 | SSL_R_BAD_ECPOINT); | |
ff74aeb1 MC |
2232 | return 0; |
2233 | } | |
2234 | ||
2235 | /* | |
2236 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2237 | * ECParameters in the server key exchange message. We do support RSA | |
2238 | * and ECDSA. | |
2239 | */ | |
555cbb32 | 2240 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
ff74aeb1 | 2241 | *pkey = X509_get0_pubkey(s->session->peer); |
555cbb32 | 2242 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
ff74aeb1 MC |
2243 | *pkey = X509_get0_pubkey(s->session->peer); |
2244 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2245 | ||
2246 | return 1; | |
2247 | #else | |
a2c2e000 MC |
2248 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2249 | ERR_R_INTERNAL_ERROR); | |
ff74aeb1 MC |
2250 | return 0; |
2251 | #endif | |
2252 | } | |
2253 | ||
be3583fa | 2254 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2255 | { |
e1e588ac | 2256 | long alg_k; |
b9908bf9 | 2257 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2258 | EVP_MD_CTX *md_ctx = NULL; |
2259 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2260 | PACKET save_param_start, signature; |
b9908bf9 | 2261 | |
555cbb32 | 2262 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2263 | |
73999b62 | 2264 | save_param_start = *pkt; |
8d92c1f8 | 2265 | |
3260adf1 | 2266 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
555cbb32 TS |
2267 | EVP_PKEY_free(s->s3.peer_tmp); |
2268 | s->s3.peer_tmp = NULL; | |
3260adf1 | 2269 | #endif |
d02b48c6 | 2270 | |
7689082b | 2271 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2272 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2273 | /* SSLfatal() already called */ | |
7dc1c647 | 2274 | goto err; |
a2c2e000 | 2275 | } |
7689082b DSH |
2276 | } |
2277 | ||
2278 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2279 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2280 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2281 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2282 | /* SSLfatal() already called */ | |
0f113f3e | 2283 | goto err; |
a2c2e000 | 2284 | } |
e01a610d | 2285 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2286 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2287 | /* SSLfatal() already called */ | |
e01a610d | 2288 | goto err; |
a2c2e000 | 2289 | } |
ff74aeb1 | 2290 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2291 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2292 | /* SSLfatal() already called */ | |
ff74aeb1 | 2293 | goto err; |
a2c2e000 | 2294 | } |
0f113f3e | 2295 | } else if (alg_k) { |
a2c2e000 MC |
2296 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2297 | SSL_R_UNEXPECTED_MESSAGE); | |
e1e588ac | 2298 | goto err; |
0f113f3e | 2299 | } |
0f113f3e | 2300 | |
0f113f3e MC |
2301 | /* if it was signed, check the signature */ |
2302 | if (pkey != NULL) { | |
32942870 | 2303 | PACKET params; |
be8dba2c | 2304 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2305 | unsigned char *tbs; |
2306 | size_t tbslen; | |
2307 | int rv; | |
e1e588ac | 2308 | |
32942870 EK |
2309 | /* |
2310 | * |pkt| now points to the beginning of the signature, so the difference | |
2311 | * equals the length of the parameters. | |
2312 | */ | |
2313 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2314 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2315 | PACKET_remaining(pkt))) { |
a2c2e000 MC |
2316 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2317 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2318 | goto err; |
32942870 EK |
2319 | } |
2320 | ||
0f113f3e | 2321 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2322 | unsigned int sigalg; |
703bcee0 MC |
2323 | |
2324 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
a2c2e000 MC |
2325 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2326 | SSL_R_LENGTH_TOO_SHORT); | |
e1e588ac | 2327 | goto err; |
0f113f3e | 2328 | } |
f63a17d6 MC |
2329 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2330 | /* SSLfatal() already called */ | |
0f113f3e | 2331 | goto err; |
0f113f3e | 2332 | } |
f365a3e2 | 2333 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
a2c2e000 MC |
2334 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2335 | ERR_R_INTERNAL_ERROR); | |
f365a3e2 | 2336 | goto err; |
32942870 | 2337 | } |
0f113f3e | 2338 | |
555cbb32 | 2339 | if (!tls1_lookup_md(s->s3.tmp.peer_sigalg, &md)) { |
a2c2e000 MC |
2340 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2341 | ERR_R_INTERNAL_ERROR); | |
b2021556 DSH |
2342 | goto err; |
2343 | } | |
44f23cd2 | 2344 | if (SSL_USE_SIGALGS(s)) |
49b26f54 RL |
2345 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
2346 | md == NULL ? "n/a" : EVP_MD_name(md)); | |
f365a3e2 | 2347 | |
73999b62 MC |
2348 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2349 | || PACKET_remaining(pkt) != 0) { | |
a2c2e000 MC |
2350 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2351 | SSL_R_LENGTH_MISMATCH); | |
e1e588ac | 2352 | goto err; |
0f113f3e | 2353 | } |
e1e588ac MC |
2354 | |
2355 | md_ctx = EVP_MD_CTX_new(); | |
2356 | if (md_ctx == NULL) { | |
a2c2e000 | 2357 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
dd5a4279 | 2358 | ERR_R_MALLOC_FAILURE); |
e1e588ac | 2359 | goto err; |
0f113f3e | 2360 | } |
e1e588ac | 2361 | |
fe3066ee | 2362 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
a2c2e000 MC |
2363 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2364 | ERR_R_EVP_LIB); | |
fe3066ee MC |
2365 | goto err; |
2366 | } | |
5554facb | 2367 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2368 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2369 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2370 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
a2c2e000 MC |
2371 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2372 | SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
fe3066ee MC |
2373 | goto err; |
2374 | } | |
2375 | } | |
72ceb6a6 DSH |
2376 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2377 | PACKET_remaining(¶ms)); | |
2378 | if (tbslen == 0) { | |
f63a17d6 | 2379 | /* SSLfatal() already called */ |
e1e588ac | 2380 | goto err; |
192e4bbb | 2381 | } |
72ceb6a6 DSH |
2382 | |
2383 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2384 | PACKET_remaining(&signature), tbs, tbslen); | |
2385 | OPENSSL_free(tbs); | |
cfba0675 | 2386 | if (rv <= 0) { |
a2c2e000 MC |
2387 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2388 | SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2389 | goto err; |
0f113f3e | 2390 | } |
e1e588ac | 2391 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2392 | md_ctx = NULL; |
0f113f3e | 2393 | } else { |
7689082b | 2394 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2395 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2396 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2397 | /* Might be wrong key type, check it */ |
e1e588ac | 2398 | if (ssl3_check_cert_and_algorithm(s)) { |
a2c2e000 MC |
2399 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2400 | SSL_R_BAD_DATA); | |
e1e588ac | 2401 | } |
a2c2e000 | 2402 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2403 | goto err; |
2404 | } | |
2405 | /* still data left over */ | |
73999b62 | 2406 | if (PACKET_remaining(pkt) != 0) { |
a2c2e000 MC |
2407 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2408 | SSL_R_EXTRA_DATA_IN_MESSAGE); | |
e1e588ac | 2409 | goto err; |
0f113f3e MC |
2410 | } |
2411 | } | |
e1e588ac | 2412 | |
b9908bf9 | 2413 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2414 | err: |
fe3066ee | 2415 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2416 | return MSG_PROCESS_ERROR; |
0f113f3e | 2417 | } |
d02b48c6 | 2418 | |
be3583fa | 2419 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2420 | { |
32f66107 DSH |
2421 | size_t i; |
2422 | ||
2423 | /* Clear certificate validity flags */ | |
2424 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 2425 | s->s3.tmp.valid_flags[i] = 0; |
0f113f3e | 2426 | |
03f44b97 | 2427 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2428 | PACKET reqctx, extensions; |
2429 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2430 | |
1bf4cb0f MC |
2431 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2432 | /* | |
2433 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2434 | * post-handshake messages. We can't reasonably respond to this, so | |
2435 | * we just ignore it | |
2436 | */ | |
2437 | return MSG_PROCESS_FINISHED_READING; | |
2438 | } | |
2439 | ||
03f44b97 | 2440 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2441 | OPENSSL_free(s->s3.tmp.ctype); |
2442 | s->s3.tmp.ctype = NULL; | |
2443 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2444 | OPENSSL_free(s->pha_context); |
2445 | s->pha_context = NULL; | |
32f66107 | 2446 | |
9d75dce3 TS |
2447 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2448 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
f63a17d6 MC |
2449 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2450 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2451 | SSL_R_LENGTH_MISMATCH); | |
2452 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2453 | } |
32f66107 DSH |
2454 | |
2455 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
2456 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2457 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2458 | SSL_R_BAD_LENGTH); | |
2459 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2460 | } |
2461 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2462 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2463 | &rawexts, NULL, 1) |
fe874d27 | 2464 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2465 | rawexts, NULL, 0, 1)) { |
2466 | /* SSLfatal() already called */ | |
32f66107 | 2467 | OPENSSL_free(rawexts); |
f63a17d6 | 2468 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2469 | } |
2470 | OPENSSL_free(rawexts); | |
2471 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2472 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2473 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2474 | SSL_R_BAD_LENGTH); | |
2475 | return MSG_PROCESS_ERROR; | |
32f66107 | 2476 | } |
03f44b97 DSH |
2477 | } else { |
2478 | PACKET ctypes; | |
75c13e78 | 2479 | |
03f44b97 DSH |
2480 | /* get the certificate types */ |
2481 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
f63a17d6 MC |
2482 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2483 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2484 | SSL_R_LENGTH_MISMATCH); | |
2485 | return MSG_PROCESS_ERROR; | |
03f44b97 DSH |
2486 | } |
2487 | ||
555cbb32 | 2488 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
f63a17d6 MC |
2489 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2490 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2491 | ERR_R_INTERNAL_ERROR); | |
2492 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2493 | } |
ac112332 | 2494 | |
32f66107 DSH |
2495 | if (SSL_USE_SIGALGS(s)) { |
2496 | PACKET sigalgs; | |
703bcee0 | 2497 | |
32f66107 | 2498 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
848a950b | 2499 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2500 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2501 | SSL_R_LENGTH_MISMATCH); | |
2502 | return MSG_PROCESS_ERROR; | |
32f66107 | 2503 | } |
ac112332 | 2504 | |
c589c34e BK |
2505 | /* |
2506 | * Despite this being for certificates, preserve compatibility | |
2507 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2508 | */ | |
2509 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 MC |
2510 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2511 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2512 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2513 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2514 | } |
2515 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2516 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2517 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2518 | ERR_R_MALLOC_FAILURE); | |
2519 | return MSG_PROCESS_ERROR; | |
32f66107 | 2520 | } |
0f113f3e | 2521 | } |
0f113f3e | 2522 | |
32f66107 | 2523 | /* get the CA RDNs */ |
f63a17d6 MC |
2524 | if (!parse_ca_names(s, pkt)) { |
2525 | /* SSLfatal() already called */ | |
2526 | return MSG_PROCESS_ERROR; | |
2527 | } | |
03f44b97 DSH |
2528 | } |
2529 | ||
2530 | if (PACKET_remaining(pkt) != 0) { | |
848a950b | 2531 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2532 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2533 | SSL_R_LENGTH_MISMATCH); | |
2534 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2535 | } |
0f113f3e | 2536 | |
0f113f3e | 2537 | /* we should setup a certificate to return.... */ |
555cbb32 | 2538 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2539 | |
e4562014 MC |
2540 | /* |
2541 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2542 | * after the CertificateVerify message has been received. This is because | |
2543 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2544 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
2545 | * SSL_get_peer_certificate() returns something sensible in | |
2546 | * client_cert_cb. | |
2547 | */ | |
2548 | if (SSL_IS_TLS13(s) && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
2549 | return MSG_PROCESS_CONTINUE_READING; | |
2550 | ||
f63a17d6 | 2551 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2552 | } |
2553 | ||
be3583fa | 2554 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2555 | { |
b9908bf9 | 2556 | unsigned int ticklen; |
9ac6244b | 2557 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2558 | unsigned int sess_len; |
de1df7e9 | 2559 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2560 | PACKET nonce; |
b9908bf9 | 2561 | |
6cf2dbd9 MC |
2562 | PACKET_null_init(&nonce); |
2563 | ||
73999b62 | 2564 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2565 | || (SSL_IS_TLS13(s) |
2566 | && (!PACKET_get_net_4(pkt, &age_add) | |
6cf2dbd9 | 2567 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2568 | || !PACKET_get_net_2(pkt, &ticklen) |
10bda8f8 MC |
2569 | || (SSL_IS_TLS13(s) ? (ticklen == 0 || PACKET_remaining(pkt) < ticklen) |
2570 | : PACKET_remaining(pkt) != ticklen)) { | |
f63a17d6 MC |
2571 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2572 | SSL_R_LENGTH_MISMATCH); | |
2573 | goto err; | |
e711da71 EK |
2574 | } |
2575 | ||
de1df7e9 MC |
2576 | /* |
2577 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2578 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2579 | * be 0 here in that instance | |
2580 | */ | |
e711da71 | 2581 | if (ticklen == 0) |
c9de4a20 | 2582 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2583 | |
150840b9 MC |
2584 | /* |
2585 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2586 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2587 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2588 | * time a NewSessionTicket arrives because those messages arrive | |
2589 | * post-handshake and the session may have already gone into the session | |
2590 | * cache. | |
2591 | */ | |
2592 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee | 2593 | SSL_SESSION *new_sess; |
1f156321 | 2594 | |
98ece4ee MC |
2595 | /* |
2596 | * We reused an existing session, so we need to replace it with a new | |
2597 | * one | |
2598 | */ | |
5d61491c | 2599 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
f63a17d6 MC |
2600 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2601 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2602 | ERR_R_MALLOC_FAILURE); | |
2603 | goto err; | |
5d61491c MC |
2604 | } |
2605 | ||
1f156321 MC |
2606 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
2607 | && !SSL_IS_TLS13(s)) { | |
2608 | /* | |
2609 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2610 | * any old ticket we were using is now out of date, so we remove the | |
2611 | * old session from the cache. We carry on if this fails | |
2612 | */ | |
2613 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2614 | } | |
2615 | ||
98ece4ee MC |
2616 | SSL_SESSION_free(s->session); |
2617 | s->session = new_sess; | |
2618 | } | |
2619 | ||
fc24f0bf MC |
2620 | /* |
2621 | * Technically the cast to long here is not guaranteed by the C standard - | |
2622 | * but we use it elsewhere, so this should be ok. | |
2623 | */ | |
2624 | s->session->time = (long)time(NULL); | |
2625 | ||
aff8c126 RS |
2626 | OPENSSL_free(s->session->ext.tick); |
2627 | s->session->ext.tick = NULL; | |
2628 | s->session->ext.ticklen = 0; | |
e711da71 | 2629 | |
aff8c126 RS |
2630 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2631 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
2632 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2633 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2634 | goto err; |
2635 | } | |
aff8c126 | 2636 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
2637 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2638 | SSL_R_LENGTH_MISMATCH); | |
2639 | goto err; | |
561e12bb | 2640 | } |
e711da71 | 2641 | |
aff8c126 | 2642 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2643 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2644 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2645 | |
2646 | if (SSL_IS_TLS13(s)) { | |
2647 | PACKET extpkt; | |
2648 | ||
2649 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 MC |
2650 | || PACKET_remaining(pkt) != 0) { |
2651 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
2652 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2653 | SSL_R_LENGTH_MISMATCH); | |
2654 | goto err; | |
2655 | } | |
2656 | ||
2657 | if (!tls_collect_extensions(s, &extpkt, | |
2658 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2659 | NULL, 1) | |
fe874d27 MC |
2660 | || !tls_parse_all_extensions(s, |
2661 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2662 | exts, NULL, 0, 1)) { |
2663 | /* SSLfatal() already called */ | |
2664 | goto err; | |
de1df7e9 MC |
2665 | } |
2666 | } | |
2667 | ||
0f113f3e MC |
2668 | /* |
2669 | * There are two ways to detect a resumed ticket session. One is to set | |
2670 | * an appropriate session ID and then the server must return a match in | |
2671 | * ServerHello. This allows the normal client session ID matching to work | |
2672 | * and we know much earlier that the ticket has been accepted. The | |
2673 | * other way is to set zero length session ID when the ticket is | |
2674 | * presented and rely on the handshake to determine session resumption. | |
2675 | * We choose the former approach because this fits in with assumptions | |
2676 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2677 | * SHA256 is disabled) hash of the ticket. | |
2678 | */ | |
ec60ccc1 MC |
2679 | /* |
2680 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2681 | * but s->session->session_id_length is a size_t | |
2682 | */ | |
aff8c126 | 2683 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2684 | s->session->session_id, &sess_len, |
d166ed8c | 2685 | EVP_sha256(), NULL)) { |
f63a17d6 MC |
2686 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2687 | ERR_R_EVP_LIB); | |
d166ed8c DSH |
2688 | goto err; |
2689 | } | |
ec60ccc1 | 2690 | s->session->session_id_length = sess_len; |
4cb00457 | 2691 | s->session->not_resumable = 0; |
de1df7e9 MC |
2692 | |
2693 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2694 | if (SSL_IS_TLS13(s)) { | |
4ff1a526 MC |
2695 | const EVP_MD *md = ssl_handshake_md(s); |
2696 | int hashleni = EVP_MD_size(md); | |
2697 | size_t hashlen; | |
2698 | static const unsigned char nonce_label[] = "resumption"; | |
2699 | ||
2700 | /* Ensure cast to size_t is safe */ | |
2701 | if (!ossl_assert(hashleni >= 0)) { | |
2702 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2703 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2704 | ERR_R_INTERNAL_ERROR); | |
2705 | goto err; | |
2706 | } | |
2707 | hashlen = (size_t)hashleni; | |
2708 | ||
2709 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2710 | nonce_label, | |
2711 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2712 | PACKET_data(&nonce), |
2713 | PACKET_remaining(&nonce), | |
4ff1a526 | 2714 | s->session->master_key, |
0fb2815b | 2715 | hashlen, 1)) { |
4ff1a526 MC |
2716 | /* SSLfatal() already called */ |
2717 | goto err; | |
2718 | } | |
2719 | s->session->master_key_length = hashlen; | |
2720 | ||
33d93417 | 2721 | OPENSSL_free(exts); |
de1df7e9 MC |
2722 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2723 | return MSG_PROCESS_FINISHED_READING; | |
2724 | } | |
2725 | ||
b9908bf9 | 2726 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2727 | err: |
33d93417 | 2728 | OPENSSL_free(exts); |
b9908bf9 | 2729 | return MSG_PROCESS_ERROR; |
0f113f3e | 2730 | } |
67c8e7f4 | 2731 | |
f63e4288 MC |
2732 | /* |
2733 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2734 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2735 | */ |
f63a17d6 | 2736 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2737 | { |
8b0e934a | 2738 | size_t resplen; |
b9908bf9 | 2739 | unsigned int type; |
b9908bf9 | 2740 | |
73999b62 | 2741 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2742 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
2743 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2744 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
f63e4288 | 2745 | return 0; |
0f113f3e | 2746 | } |
56a26ce3 MC |
2747 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2748 | || PACKET_remaining(pkt) != resplen) { | |
f63a17d6 MC |
2749 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2750 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2751 | return 0; |
0f113f3e | 2752 | } |
8cbfcc70 RS |
2753 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2754 | if (s->ext.ocsp.resp == NULL) { | |
f63a17d6 MC |
2755 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2756 | ERR_R_MALLOC_FAILURE); | |
f63e4288 | 2757 | return 0; |
0f113f3e | 2758 | } |
8cbfcc70 | 2759 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63a17d6 MC |
2760 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2761 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2762 | return 0; |
ac63710a | 2763 | } |
8cbfcc70 | 2764 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2765 | |
2766 | return 1; | |
2767 | } | |
2faa1b48 | 2768 | |
f63e4288 MC |
2769 | |
2770 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2771 | { | |
f63a17d6 MC |
2772 | if (!tls_process_cert_status_body(s, pkt)) { |
2773 | /* SSLfatal() already called */ | |
f63e4288 MC |
2774 | return MSG_PROCESS_ERROR; |
2775 | } | |
2776 | ||
b9908bf9 | 2777 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2778 | } |
d02b48c6 | 2779 | |
7776a36c MC |
2780 | /* |
2781 | * Perform miscellaneous checks and processing after we have received the | |
2782 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2783 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2784 | * on failure. | |
7776a36c | 2785 | */ |
f63a17d6 | 2786 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2787 | { |
a455d0f6 MC |
2788 | /* |
2789 | * at this point we check that we have the required stuff from | |
2790 | * the server | |
2791 | */ | |
2792 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2793 | /* SSLfatal() already called */ |
7776a36c | 2794 | return 0; |
a455d0f6 MC |
2795 | } |
2796 | ||
bb1aaab4 | 2797 | /* |
aff8c126 RS |
2798 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2799 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2800 | * message, or NULL and -1 otherwise |
2801 | */ | |
aff8c126 RS |
2802 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2803 | && s->ctx->ext.status_cb != NULL) { | |
2804 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2805 | ||
bb1aaab4 | 2806 | if (ret == 0) { |
f63a17d6 MC |
2807 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
2808 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2809 | SSL_R_INVALID_STATUS_RESPONSE); | |
7776a36c | 2810 | return 0; |
bb1aaab4 MC |
2811 | } |
2812 | if (ret < 0) { | |
f63a17d6 MC |
2813 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2814 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
dd5a4279 | 2815 | ERR_R_MALLOC_FAILURE); |
7776a36c | 2816 | return 0; |
bb1aaab4 MC |
2817 | } |
2818 | } | |
ed29e82a RP |
2819 | #ifndef OPENSSL_NO_CT |
2820 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2821 | /* Note we validate the SCTs whether or not we abort on error */ |
2822 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2823 | /* SSLfatal() already called */ |
7776a36c | 2824 | return 0; |
ed29e82a RP |
2825 | } |
2826 | } | |
2827 | #endif | |
2828 | ||
7776a36c MC |
2829 | return 1; |
2830 | } | |
2831 | ||
2832 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2833 | { | |
7776a36c MC |
2834 | if (PACKET_remaining(pkt) > 0) { |
2835 | /* should contain no data */ | |
f63a17d6 MC |
2836 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2837 | SSL_R_LENGTH_MISMATCH); | |
2838 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2839 | } |
2840 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2841 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
7776a36c | 2842 | if (SRP_Calc_A_param(s) <= 0) { |
f63a17d6 MC |
2843 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2844 | SSL_R_SRP_A_CALC); | |
2845 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2846 | } |
2847 | } | |
2848 | #endif | |
2849 | ||
f63a17d6 MC |
2850 | if (!tls_process_initial_server_flight(s)) { |
2851 | /* SSLfatal() already called */ | |
2852 | return MSG_PROCESS_ERROR; | |
2853 | } | |
7776a36c | 2854 | |
bd79bcb4 | 2855 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2856 | } |
176f31dd | 2857 | |
a2c2e000 | 2858 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2859 | { |
7689082b | 2860 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2861 | int ret = 0; |
2862 | /* | |
2863 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2864 | * \0-terminated identity. The last byte is for us for simulating | |
2865 | * strnlen. | |
2866 | */ | |
2867 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2868 | size_t identitylen = 0; | |
2869 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2870 | unsigned char *tmppsk = NULL; | |
2871 | char *tmpidentity = NULL; | |
2872 | size_t psklen = 0; | |
2873 | ||
2874 | if (s->psk_client_callback == NULL) { | |
a2c2e000 MC |
2875 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2876 | SSL_R_PSK_NO_CLIENT_CB); | |
13c0ec4a MC |
2877 | goto err; |
2878 | } | |
d02b48c6 | 2879 | |
13c0ec4a | 2880 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2881 | |
13c0ec4a MC |
2882 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2883 | identity, sizeof(identity) - 1, | |
2884 | psk, sizeof(psk)); | |
7689082b | 2885 | |
13c0ec4a | 2886 | if (psklen > PSK_MAX_PSK_LEN) { |
a2c2e000 MC |
2887 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2888 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2889 | goto err; |
2890 | } else if (psklen == 0) { | |
a2c2e000 MC |
2891 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2892 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, | |
2893 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
13c0ec4a MC |
2894 | goto err; |
2895 | } | |
7689082b | 2896 | |
13c0ec4a MC |
2897 | identitylen = strlen(identity); |
2898 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2899 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2900 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2901 | goto err; |
2902 | } | |
7689082b | 2903 | |
13c0ec4a MC |
2904 | tmppsk = OPENSSL_memdup(psk, psklen); |
2905 | tmpidentity = OPENSSL_strdup(identity); | |
2906 | if (tmppsk == NULL || tmpidentity == NULL) { | |
a2c2e000 MC |
2907 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2908 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2909 | goto err; |
2910 | } | |
7689082b | 2911 | |
555cbb32 TS |
2912 | OPENSSL_free(s->s3.tmp.psk); |
2913 | s->s3.tmp.psk = tmppsk; | |
2914 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
2915 | tmppsk = NULL; |
2916 | OPENSSL_free(s->session->psk_identity); | |
2917 | s->session->psk_identity = tmpidentity; | |
2918 | tmpidentity = NULL; | |
f1ec23c0 | 2919 | |
b2b3024e | 2920 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
a2c2e000 MC |
2921 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2922 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2923 | goto err; |
2924 | } | |
7689082b | 2925 | |
13c0ec4a | 2926 | ret = 1; |
0bce0b02 | 2927 | |
13c0ec4a MC |
2928 | err: |
2929 | OPENSSL_cleanse(psk, psklen); | |
2930 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2931 | OPENSSL_clear_free(tmppsk, psklen); | |
2932 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2933 | |
13c0ec4a MC |
2934 | return ret; |
2935 | #else | |
a2c2e000 MC |
2936 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2937 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2938 | return 0; |
b9908bf9 | 2939 | #endif |
13c0ec4a | 2940 | } |
b9908bf9 | 2941 | |
a2c2e000 | 2942 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2943 | { |
bc36ee62 | 2944 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2945 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2946 | EVP_PKEY *pkey = NULL; |
2947 | EVP_PKEY_CTX *pctx = NULL; | |
2948 | size_t enclen; | |
2949 | unsigned char *pms = NULL; | |
2950 | size_t pmslen = 0; | |
b9908bf9 | 2951 | |
13c0ec4a MC |
2952 | if (s->session->peer == NULL) { |
2953 | /* | |
2954 | * We should always have a server certificate with SSL_kRSA. | |
2955 | */ | |
a2c2e000 MC |
2956 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2957 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2958 | return 0; |
2959 | } | |
0f113f3e | 2960 | |
13c0ec4a MC |
2961 | pkey = X509_get0_pubkey(s->session->peer); |
2962 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
a2c2e000 MC |
2963 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2964 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2965 | return 0; |
2966 | } | |
0f113f3e | 2967 | |
13c0ec4a MC |
2968 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2969 | pms = OPENSSL_malloc(pmslen); | |
2970 | if (pms == NULL) { | |
a2c2e000 MC |
2971 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2972 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2973 | return 0; |
2974 | } | |
0bce0b02 | 2975 | |
13c0ec4a MC |
2976 | pms[0] = s->client_version >> 8; |
2977 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2978 | /* TODO(size_t): Convert this function */ |
16cfc2c9 | 2979 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { |
a2c2e000 MC |
2980 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2981 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2982 | goto err; |
2983 | } | |
0f113f3e | 2984 | |
13c0ec4a | 2985 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2986 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
a2c2e000 MC |
2987 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2988 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2989 | goto err; |
2990 | } | |
13c0ec4a MC |
2991 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2992 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2993 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2994 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2995 | ERR_R_EVP_LIB); | |
13c0ec4a MC |
2996 | goto err; |
2997 | } | |
f1ec23c0 MC |
2998 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2999 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3000 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3001 | SSL_R_BAD_RSA_ENCRYPT); | |
13c0ec4a MC |
3002 | goto err; |
3003 | } | |
13c0ec4a MC |
3004 | EVP_PKEY_CTX_free(pctx); |
3005 | pctx = NULL; | |
0f113f3e | 3006 | |
13c0ec4a | 3007 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3008 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
a2c2e000 MC |
3009 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3010 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3011 | goto err; |
b9908bf9 | 3012 | } |
13c0ec4a | 3013 | |
2faa1b48 | 3014 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
3015 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
3016 | /* SSLfatal() already called */ | |
2faa1b48 | 3017 | goto err; |
a2c2e000 | 3018 | } |
2faa1b48 | 3019 | |
555cbb32 TS |
3020 | s->s3.tmp.pms = pms; |
3021 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 3022 | |
13c0ec4a MC |
3023 | return 1; |
3024 | err: | |
3025 | OPENSSL_clear_free(pms, pmslen); | |
3026 | EVP_PKEY_CTX_free(pctx); | |
3027 | ||
3028 | return 0; | |
3029 | #else | |
a2c2e000 MC |
3030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3031 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 3032 | return 0; |
f9b3bff6 | 3033 | #endif |
13c0ec4a MC |
3034 | } |
3035 | ||
a2c2e000 | 3036 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 MC |
3037 | { |
3038 | #ifndef OPENSSL_NO_DH | |
3039 | DH *dh_clnt = NULL; | |
3040 | const BIGNUM *pub_key; | |
3041 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 3042 | unsigned char *keybytes = NULL; |
a8c1c704 | 3043 | |
555cbb32 | 3044 | skey = s->s3.peer_tmp; |
a2c2e000 MC |
3045 | if (skey == NULL) { |
3046 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3047 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3048 | goto err; |
a2c2e000 | 3049 | } |
f1ec23c0 | 3050 | |
0a699a07 | 3051 | ckey = ssl_generate_pkey(skey); |
a2c2e000 MC |
3052 | if (ckey == NULL) { |
3053 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3054 | ERR_R_INTERNAL_ERROR); | |
b599ce3b | 3055 | goto err; |
a2c2e000 | 3056 | } |
b599ce3b | 3057 | |
a8c1c704 MC |
3058 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
3059 | ||
a2c2e000 MC |
3060 | if (dh_clnt == NULL) { |
3061 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3062 | ERR_R_INTERNAL_ERROR); | |
3063 | goto err; | |
3064 | } | |
3065 | ||
3066 | if (ssl_derive(s, ckey, skey, 0) == 0) { | |
3067 | /* SSLfatal() already called */ | |
f1ec23c0 | 3068 | goto err; |
a2c2e000 | 3069 | } |
a8c1c704 MC |
3070 | |
3071 | /* send off the data */ | |
3072 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
a2c2e000 MC |
3073 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), |
3074 | &keybytes)) { | |
3075 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3076 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3077 | goto err; |
a2c2e000 | 3078 | } |
f1ec23c0 MC |
3079 | |
3080 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
3081 | EVP_PKEY_free(ckey); |
3082 | ||
3083 | return 1; | |
f1ec23c0 MC |
3084 | err: |
3085 | EVP_PKEY_free(ckey); | |
f9f674eb MC |
3086 | return 0; |
3087 | #else | |
a2c2e000 MC |
3088 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, |
3089 | ERR_R_INTERNAL_ERROR); | |
a8c1c704 | 3090 | return 0; |
f9f674eb | 3091 | #endif |
a8c1c704 MC |
3092 | } |
3093 | ||
a2c2e000 | 3094 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab MC |
3095 | { |
3096 | #ifndef OPENSSL_NO_EC | |
3097 | unsigned char *encodedPoint = NULL; | |
348240c6 | 3098 | size_t encoded_pt_len = 0; |
67ad5aab | 3099 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3100 | int ret = 0; |
67ad5aab | 3101 | |
555cbb32 | 3102 | skey = s->s3.peer_tmp; |
ec24630a | 3103 | if (skey == NULL) { |
a2c2e000 MC |
3104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3105 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3106 | return 0; |
3107 | } | |
3108 | ||
0a699a07 | 3109 | ckey = ssl_generate_pkey(skey); |
b599ce3b | 3110 | if (ckey == NULL) { |
a2c2e000 MC |
3111 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3112 | ERR_R_MALLOC_FAILURE); | |
b599ce3b MC |
3113 | goto err; |
3114 | } | |
67ad5aab | 3115 | |
0f1e51ea | 3116 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3117 | /* SSLfatal() already called */ |
67ad5aab MC |
3118 | goto err; |
3119 | } | |
3120 | ||
3121 | /* Generate encoding of client key */ | |
ec24630a | 3122 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
3123 | |
3124 | if (encoded_pt_len == 0) { | |
a2c2e000 MC |
3125 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3126 | ERR_R_EC_LIB); | |
67ad5aab MC |
3127 | goto err; |
3128 | } | |
3129 | ||
b2b3024e | 3130 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
a2c2e000 MC |
3131 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3132 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
3133 | goto err; |
3134 | } | |
67ad5aab | 3135 | |
f1ec23c0 | 3136 | ret = 1; |
67ad5aab | 3137 | err: |
f1ec23c0 | 3138 | OPENSSL_free(encodedPoint); |
67ad5aab | 3139 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3140 | return ret; |
67ad5aab | 3141 | #else |
a2c2e000 MC |
3142 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3143 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3144 | return 0; |
3145 | #endif | |
3146 | } | |
3147 | ||
a2c2e000 | 3148 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3149 | { |
3150 | #ifndef OPENSSL_NO_GOST | |
3151 | /* GOST key exchange message creation */ | |
3152 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3153 | X509 *peer_cert; | |
3154 | size_t msglen; | |
3155 | unsigned int md_len; | |
3156 | unsigned char shared_ukm[32], tmp[256]; | |
3157 | EVP_MD_CTX *ukm_hash = NULL; | |
3158 | int dgst_nid = NID_id_GostR3411_94; | |
3159 | unsigned char *pms = NULL; | |
3160 | size_t pmslen = 0; | |
3161 | ||
555cbb32 | 3162 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3163 | dgst_nid = NID_id_GostR3411_2012_256; |
3164 | ||
3165 | /* | |
1ee4b98e | 3166 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3167 | */ |
3168 | peer_cert = s->session->peer; | |
12a765a5 | 3169 | if (peer_cert == NULL) { |
a2c2e000 | 3170 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
3171 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
3172 | return 0; | |
3173 | } | |
3174 | ||
3175 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
3176 | if (pkey_ctx == NULL) { | |
a2c2e000 MC |
3177 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3178 | ERR_R_MALLOC_FAILURE); | |
e00e0b3d MC |
3179 | return 0; |
3180 | } | |
3181 | /* | |
3182 | * If we have send a certificate, and certificate key | |
3183 | * parameters match those of server certificate, use | |
3184 | * certificate key for key exchange | |
3185 | */ | |
3186 | ||
3187 | /* Otherwise, generate ephemeral key pair */ | |
3188 | pmslen = 32; | |
3189 | pms = OPENSSL_malloc(pmslen); | |
3190 | if (pms == NULL) { | |
a2c2e000 MC |
3191 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3192 | ERR_R_MALLOC_FAILURE); | |
2f3930bc | 3193 | goto err; |
e00e0b3d MC |
3194 | } |
3195 | ||
3196 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3197 | /* Generate session key |
3198 | * TODO(size_t): Convert this function | |
3199 | */ | |
16cfc2c9 | 3200 | || RAND_bytes(pms, (int)pmslen) <= 0) { |
a2c2e000 MC |
3201 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3202 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3203 | goto err; |
3204 | }; | |
e00e0b3d MC |
3205 | /* |
3206 | * Compute shared IV and store it in algorithm-specific context | |
3207 | * data | |
3208 | */ | |
3209 | ukm_hash = EVP_MD_CTX_new(); | |
3210 | if (ukm_hash == NULL | |
a230b26e | 3211 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3212 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3213 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3214 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3215 | SSL3_RANDOM_SIZE) <= 0 |
3216 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
a2c2e000 MC |
3217 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3218 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3219 | goto err; |
3220 | } | |
3221 | EVP_MD_CTX_free(ukm_hash); | |
3222 | ukm_hash = NULL; | |
3223 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3224 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
a2c2e000 MC |
3225 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3226 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3227 | goto err; |
3228 | } | |
3229 | /* Make GOST keytransport blob message */ | |
3230 | /* | |
3231 | * Encapsulate it into sequence | |
3232 | */ | |
e00e0b3d MC |
3233 | msglen = 255; |
3234 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3236 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3237 | goto err; |
3238 | } | |
f1ec23c0 | 3239 | |
08029dfa MC |
3240 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3241 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3242 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
a2c2e000 MC |
3243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3244 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3245 | goto err; |
e00e0b3d | 3246 | } |
f1ec23c0 | 3247 | |
e00e0b3d | 3248 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3249 | s->s3.tmp.pms = pms; |
3250 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3251 | |
3252 | return 1; | |
3253 | err: | |
3254 | EVP_PKEY_CTX_free(pkey_ctx); | |
3255 | OPENSSL_clear_free(pms, pmslen); | |
3256 | EVP_MD_CTX_free(ukm_hash); | |
3257 | return 0; | |
3258 | #else | |
a2c2e000 MC |
3259 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3260 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3261 | return 0; |
3262 | #endif | |
3263 | } | |
3264 | ||
a2c2e000 | 3265 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3266 | { |
8b9546c7 | 3267 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3268 | unsigned char *abytes = NULL; |
3269 | ||
3270 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3271 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3272 | &abytes)) { | |
a2c2e000 MC |
3273 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3274 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3275 | return 0; |
3276 | } | |
f1ec23c0 MC |
3277 | BN_bn2bin(s->srp_ctx.A, abytes); |
3278 | ||
840a2bf8 MC |
3279 | OPENSSL_free(s->session->srp_username); |
3280 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3281 | if (s->session->srp_username == NULL) { | |
a2c2e000 MC |
3282 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3283 | ERR_R_MALLOC_FAILURE); | |
840a2bf8 MC |
3284 | return 0; |
3285 | } | |
3286 | ||
3287 | return 1; | |
3288 | #else | |
a2c2e000 MC |
3289 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3290 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3291 | return 0; |
3292 | #endif | |
3293 | } | |
3294 | ||
7cea05dc | 3295 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3296 | { |
13c0ec4a | 3297 | unsigned long alg_k; |
13c0ec4a | 3298 | |
555cbb32 | 3299 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3300 | |
a2c2e000 MC |
3301 | /* |
3302 | * All of the construct functions below call SSLfatal() if necessary so | |
3303 | * no need to do so here. | |
3304 | */ | |
13c0ec4a | 3305 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3306 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3307 | goto err; |
3308 | ||
f1ec23c0 | 3309 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3310 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3311 | goto err; |
a8c1c704 | 3312 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3313 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3314 | goto err; |
67ad5aab | 3315 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3316 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3317 | goto err; |
e00e0b3d | 3318 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3319 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3320 | goto err; |
840a2bf8 | 3321 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3322 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3323 | goto err; |
4a424545 | 3324 | } else if (!(alg_k & SSL_kPSK)) { |
a2c2e000 MC |
3325 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3326 | SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3327 | goto err; |
3328 | } | |
3329 | ||
b9908bf9 | 3330 | return 1; |
0f113f3e | 3331 | err: |
555cbb32 TS |
3332 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3333 | s->s3.tmp.pms = NULL; | |
7689082b | 3334 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3335 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3336 | s->s3.tmp.psk = NULL; | |
0f113f3e | 3337 | #endif |
b9908bf9 MC |
3338 | return 0; |
3339 | } | |
3340 | ||
3341 | int tls_client_key_exchange_post_work(SSL *s) | |
3342 | { | |
3343 | unsigned char *pms = NULL; | |
3344 | size_t pmslen = 0; | |
3345 | ||
555cbb32 TS |
3346 | pms = s->s3.tmp.pms; |
3347 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3348 | |
b9908bf9 MC |
3349 | #ifndef OPENSSL_NO_SRP |
3350 | /* Check for SRP */ | |
555cbb32 | 3351 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3352 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3353 | /* SSLfatal() already called */ |
b9908bf9 MC |
3354 | goto err; |
3355 | } | |
3356 | return 1; | |
3357 | } | |
3358 | #endif | |
b9908bf9 | 3359 | |
555cbb32 | 3360 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
a2c2e000 MC |
3361 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3362 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
b9908bf9 MC |
3363 | goto err; |
3364 | } | |
3365 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3366 | /* SSLfatal() already called */ |
6f137370 MC |
3367 | /* ssl_generate_master_secret frees the pms even on error */ |
3368 | pms = NULL; | |
3369 | pmslen = 0; | |
b9908bf9 MC |
3370 | goto err; |
3371 | } | |
6f137370 MC |
3372 | pms = NULL; |
3373 | pmslen = 0; | |
473483d4 MC |
3374 | |
3375 | #ifndef OPENSSL_NO_SCTP | |
3376 | if (SSL_IS_DTLS(s)) { | |
3377 | unsigned char sctpauthkey[64]; | |
3378 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3379 | size_t labellen; |
473483d4 MC |
3380 | |
3381 | /* | |
3382 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3383 | * used. | |
3384 | */ | |
141eb8c6 MC |
3385 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3386 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3387 | |
09d62b33 MT |
3388 | /* Don't include the terminating zero. */ |
3389 | labellen = sizeof(labelbuffer) - 1; | |
3390 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3391 | labellen += 1; | |
3392 | ||
473483d4 | 3393 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e | 3394 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3395 | labellen, NULL, 0, 0) <= 0) { |
a2c2e000 | 3396 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
dd5a4279 MC |
3397 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, |
3398 | ERR_R_INTERNAL_ERROR); | |
473483d4 | 3399 | goto err; |
a2c2e000 | 3400 | } |
473483d4 MC |
3401 | |
3402 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3403 | sizeof(sctpauthkey), sctpauthkey); | |
3404 | } | |
3405 | #endif | |
3406 | ||
b9908bf9 MC |
3407 | return 1; |
3408 | err: | |
3409 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3410 | s->s3.tmp.pms = NULL; |
b9908bf9 | 3411 | return 0; |
0f113f3e | 3412 | } |
d02b48c6 | 3413 | |
0f113f3e MC |
3414 | /* |
3415 | * Check a certificate can be used for client authentication. Currently check | |
3416 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3417 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3418 | */ |
3419 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3420 | { |
0f113f3e | 3421 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3422 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3423 | return 0; |
3424 | /* | |
3425 | * If strict mode check suitability of chain before using it. This also | |
3426 | * adjusts suite B digest if necessary. | |
3427 | */ | |
3428 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3429 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3430 | return 0; | |
0f113f3e MC |
3431 | return 1; |
3432 | } | |
0d609395 | 3433 | |
be3583fa | 3434 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3435 | { |
3436 | X509 *x509 = NULL; | |
3437 | EVP_PKEY *pkey = NULL; | |
3438 | int i; | |
3439 | ||
b9908bf9 | 3440 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3441 | /* Let cert callback update client certificates if required */ |
3442 | if (s->cert->cert_cb) { | |
3443 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3444 | if (i < 0) { | |
3445 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3446 | return WORK_MORE_A; |
0f113f3e MC |
3447 | } |
3448 | if (i == 0) { | |
f63a17d6 MC |
3449 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3450 | SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, | |
3451 | SSL_R_CALLBACK_FAILED); | |
eb5fd03b | 3452 | return WORK_ERROR; |
0f113f3e MC |
3453 | } |
3454 | s->rwstate = SSL_NOTHING; | |
3455 | } | |
9d75dce3 TS |
3456 | if (ssl3_check_client_certificate(s)) { |
3457 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3458 | return WORK_FINISHED_STOP; | |
3459 | } | |
b9908bf9 | 3460 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3461 | } |
b9908bf9 MC |
3462 | |
3463 | /* Fall through to WORK_MORE_B */ | |
3464 | wst = WORK_MORE_B; | |
0f113f3e MC |
3465 | } |
3466 | ||
3467 | /* We need to get a client cert */ | |
b9908bf9 | 3468 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3469 | /* |
3470 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3471 | * return(-1); We then get retied later | |
3472 | */ | |
0f113f3e MC |
3473 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3474 | if (i < 0) { | |
3475 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3476 | return WORK_MORE_B; |
0f113f3e MC |
3477 | } |
3478 | s->rwstate = SSL_NOTHING; | |
3479 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3480 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3481 | i = 0; | |
3482 | } else if (i == 1) { | |
3483 | i = 0; | |
b9908bf9 | 3484 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3485 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3486 | } | |
3487 | ||
222561fe | 3488 | X509_free(x509); |
25aaa98a | 3489 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3490 | if (i && !ssl3_check_client_certificate(s)) |
3491 | i = 0; | |
3492 | if (i == 0) { | |
3493 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3494 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3495 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3496 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3497 | } else { |
555cbb32 | 3498 | s->s3.tmp.cert_req = 2; |
124037fd | 3499 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3500 | /* SSLfatal() already called */ |
eb5fd03b | 3501 | return WORK_ERROR; |
dab18ab5 | 3502 | } |
0f113f3e MC |
3503 | } |
3504 | } | |
3505 | ||
9d75dce3 TS |
3506 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3507 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3508 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3509 | } |
3510 | ||
b9908bf9 | 3511 | /* Shouldn't ever get here */ |
a2c2e000 MC |
3512 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
3513 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3514 | return WORK_ERROR; |
3515 | } | |
3516 | ||
7cea05dc | 3517 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3518 | { |
9d75dce3 TS |
3519 | if (SSL_IS_TLS13(s)) { |
3520 | if (s->pha_context == NULL) { | |
3521 | /* no context available, add 0-length context */ | |
3522 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
3523 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3524 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3525 | return 0; | |
3526 | } | |
3527 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
3528 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3529 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3530 | return 0; | |
3531 | } | |
f63a17d6 MC |
3532 | } |
3533 | if (!ssl3_output_cert_chain(s, pkt, | |
555cbb32 | 3534 | (s->s3.tmp.cert_req == 2) ? NULL |
f63a17d6 MC |
3535 | : s->cert->key)) { |
3536 | /* SSLfatal() already called */ | |
3537 | return 0; | |
f7e393be MC |
3538 | } |
3539 | ||
3540 | if (SSL_IS_TLS13(s) | |
3541 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3542 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3543 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3544 | /* |
a2c2e000 | 3545 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3546 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3547 | */ |
f63a17d6 | 3548 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, |
dd5a4279 | 3549 | SSL_R_CANNOT_CHANGE_CIPHER); |
c31ad0bb | 3550 | return 0; |
0f113f3e | 3551 | } |
b9908bf9 MC |
3552 | |
3553 | return 1; | |
0f113f3e MC |
3554 | } |
3555 | ||
36d16f8e | 3556 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3557 | { |
dd24857b DSH |
3558 | const SSL_CERT_LOOKUP *clu; |
3559 | size_t idx; | |
0f113f3e | 3560 | long alg_k, alg_a; |
d02b48c6 | 3561 | |
555cbb32 TS |
3562 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3563 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3564 | |
0f113f3e | 3565 | /* we don't have a certificate */ |
dd24857b DSH |
3566 | if (!(alg_a & SSL_aCERT)) |
3567 | return 1; | |
d02b48c6 | 3568 | |
0f113f3e | 3569 | /* This is the passed certificate */ |
dd24857b | 3570 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3571 | |
dd24857b DSH |
3572 | /* Check certificate is recognised and suitable for cipher */ |
3573 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
f63a17d6 MC |
3574 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3575 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3576 | SSL_R_MISSING_SIGNING_CERT); | |
3577 | return 0; | |
0f113f3e | 3578 | } |
0f113f3e | 3579 | |
dd24857b DSH |
3580 | #ifndef OPENSSL_NO_EC |
3581 | if (clu->amask & SSL_aECDSA) { | |
3582 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3583 | return 1; | |
f63a17d6 MC |
3584 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3585 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3586 | return 0; | |
0f113f3e | 3587 | } |
d02b48c6 | 3588 | #endif |
bc36ee62 | 3589 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3590 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 MC |
3591 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3592 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3593 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3594 | return 0; | |
0f113f3e | 3595 | } |
79df9d62 | 3596 | #endif |
bc36ee62 | 3597 | #ifndef OPENSSL_NO_DH |
555cbb32 | 3598 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
f63a17d6 MC |
3599 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3600 | ERR_R_INTERNAL_ERROR); | |
3601 | return 0; | |
0f113f3e | 3602 | } |
d02b48c6 RE |
3603 | #endif |
3604 | ||
dd24857b | 3605 | return 1; |
0f113f3e MC |
3606 | } |
3607 | ||
e481f9b9 | 3608 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3609 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3610 | { |
15e6be6c MC |
3611 | size_t len, padding_len; |
3612 | unsigned char *padding = NULL; | |
15e6be6c | 3613 | |
aff8c126 | 3614 | len = s->ext.npn_len; |
b9908bf9 | 3615 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3616 | |
aff8c126 | 3617 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3618 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
a2c2e000 MC |
3619 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_NEXT_PROTO, |
3620 | ERR_R_INTERNAL_ERROR); | |
3621 | return 0; | |
15e6be6c MC |
3622 | } |
3623 | ||
3624 | memset(padding, 0, padding_len); | |
3625 | ||
b9908bf9 MC |
3626 | return 1; |
3627 | } | |
6434abbf | 3628 | #endif |
368888bc | 3629 | |
c7f47786 MC |
3630 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3631 | { | |
3632 | if (PACKET_remaining(pkt) > 0) { | |
3633 | /* should contain no data */ | |
f63a17d6 MC |
3634 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_REQ, |
3635 | SSL_R_LENGTH_MISMATCH); | |
c7f47786 MC |
3636 | return MSG_PROCESS_ERROR; |
3637 | } | |
3638 | ||
db0f35dd TS |
3639 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3640 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3641 | return MSG_PROCESS_FINISHED_READING; | |
3642 | } | |
3643 | ||
c7f47786 | 3644 | /* |
1f04f23e MC |
3645 | * This is a historical discrepancy (not in the RFC) maintained for |
3646 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3647 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3648 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3649 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3650 | */ |
3651 | if (SSL_IS_DTLS(s)) | |
3652 | SSL_renegotiate(s); | |
3653 | else | |
3654 | SSL_renegotiate_abbreviated(s); | |
3655 | ||
3656 | return MSG_PROCESS_FINISHED_READING; | |
3657 | } | |
3658 | ||
e46f2334 MC |
3659 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3660 | { | |
e46f2334 | 3661 | PACKET extensions; |
3434f40b | 3662 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3663 | |
26b9172a MC |
3664 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3665 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3666 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, |
3667 | SSL_R_LENGTH_MISMATCH); | |
e46f2334 MC |
3668 | goto err; |
3669 | } | |
3670 | ||
fe874d27 MC |
3671 | if (!tls_collect_extensions(s, &extensions, |
3672 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3673 | NULL, 1) |
fe874d27 | 3674 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3675 | rawexts, NULL, 0, 1)) { |
3676 | /* SSLfatal() already called */ | |
3434f40b | 3677 | goto err; |
f63a17d6 | 3678 | } |
3434f40b | 3679 | |
1b0286a3 | 3680 | OPENSSL_free(rawexts); |
e46f2334 MC |
3681 | return MSG_PROCESS_CONTINUE_READING; |
3682 | ||
3683 | err: | |
1b0286a3 | 3684 | OPENSSL_free(rawexts); |
e46f2334 MC |
3685 | return MSG_PROCESS_ERROR; |
3686 | } | |
3687 | ||
368888bc | 3688 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3689 | { |
3690 | int i = 0; | |
368888bc | 3691 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3692 | if (s->ctx->client_cert_engine) { |
3693 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3694 | SSL_get_client_CA_list(s), | |
3695 | px509, ppkey, NULL, NULL, NULL); | |
3696 | if (i != 0) | |
3697 | return i; | |
3698 | } | |
3699 | #endif | |
3700 | if (s->ctx->client_cert_cb) | |
3701 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3702 | return i; | |
3703 | } | |
d45ba43d | 3704 | |
ae2f7b37 | 3705 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3706 | { |
2c7b4dbc | 3707 | int i; |
aafec89c | 3708 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3709 | int empty_reneg_info_scsv = !s->renegotiate; |
1d0c08b4 | 3710 | |
d45ba43d | 3711 | /* Set disabled masks for this session */ |
1d0c08b4 MC |
3712 | if (!ssl_set_client_disabled(s)) { |
3713 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3714 | SSL_R_NO_PROTOCOLS_AVAILABLE); | |
3715 | return 0; | |
3716 | } | |
d45ba43d | 3717 | |
f63a17d6 MC |
3718 | if (sk == NULL) { |
3719 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3720 | ERR_R_INTERNAL_ERROR); | |
26a7d938 | 3721 | return 0; |
f63a17d6 | 3722 | } |
d45ba43d | 3723 | |
2c7b4dbc MC |
3724 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3725 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3726 | # error Max cipher length too short | |
3727 | # endif | |
3728 | /* | |
3729 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3730 | * chop number of supported ciphers to keep it well below this if we | |
3731 | * use TLS v1.2 | |
3732 | */ | |
3733 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3734 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3735 | else | |
3736 | #endif | |
3737 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3738 | maxlen = 0xfffe; | |
3739 | ||
3740 | if (empty_reneg_info_scsv) | |
3741 | maxlen -= 2; | |
3742 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3743 | maxlen -= 2; | |
3744 | ||
3745 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3746 | const SSL_CIPHER *c; | |
3747 | ||
d45ba43d MC |
3748 | c = sk_SSL_CIPHER_value(sk, i); |
3749 | /* Skip disabled ciphers */ | |
8af91fd9 | 3750 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3751 | continue; |
2c7b4dbc MC |
3752 | |
3753 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
f63a17d6 MC |
3754 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3755 | ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3756 | return 0; |
3757 | } | |
3758 | ||
aafec89c MC |
3759 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3760 | if (!maxverok) { | |
3761 | if (SSL_IS_DTLS(s)) { | |
555cbb32 TS |
3762 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
3763 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
3764 | maxverok = 1; |
3765 | } else { | |
555cbb32 TS |
3766 | if (c->max_tls >= s->s3.tmp.max_ver |
3767 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
3768 | maxverok = 1; |
3769 | } | |
3770 | } | |
3771 | ||
2c7b4dbc | 3772 | totlen += len; |
d45ba43d | 3773 | } |
2c7b4dbc | 3774 | |
aafec89c | 3775 | if (totlen == 0 || !maxverok) { |
f63a17d6 MC |
3776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3777 | SSL_R_NO_CIPHERS_AVAILABLE); | |
aafec89c MC |
3778 | |
3779 | if (!maxverok) | |
3780 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3781 | "SSL/TLS version"); | |
3782 | ||
2c7b4dbc MC |
3783 | return 0; |
3784 | } | |
3785 | ||
3786 | if (totlen != 0) { | |
d45ba43d MC |
3787 | if (empty_reneg_info_scsv) { |
3788 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3789 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3790 | }; |
2c7b4dbc | 3791 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3792 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3793 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3794 | return 0; |
3795 | } | |
d45ba43d MC |
3796 | } |
3797 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3798 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3799 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3800 | }; |
2c7b4dbc | 3801 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3802 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3803 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3804 | return 0; |
3805 | } | |
d45ba43d MC |
3806 | } |
3807 | } | |
3808 | ||
2c7b4dbc | 3809 | return 1; |
d45ba43d | 3810 | } |
ef6c191b MC |
3811 | |
3812 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3813 | { | |
3814 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3815 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
635c8f77 MC |
3816 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3817 | SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3818 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
ef6c191b MC |
3819 | return 0; |
3820 | } | |
3821 | ||
3822 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3823 | return 1; | |
3824 | } |