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846e33c7 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 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 | |
92f86035 P |
12 | /* We need to use some engine deprecated APIs */ |
13 | #define OPENSSL_SUPPRESS_DEPRECATED | |
14 | ||
d02b48c6 | 15 | #include <stdio.h> |
fc24f0bf | 16 | #include <time.h> |
dee0cc10 | 17 | #include <assert.h> |
706457b7 DMSP |
18 | #include "../ssl_local.h" |
19 | #include "statem_local.h" | |
ec577822 BM |
20 | #include <openssl/buffer.h> |
21 | #include <openssl/rand.h> | |
22 | #include <openssl/objects.h> | |
23 | #include <openssl/evp.h> | |
dbad1690 | 24 | #include <openssl/md5.h> |
3c27208f | 25 | #include <openssl/dh.h> |
d095b68d | 26 | #include <openssl/bn.h> |
3c27208f | 27 | #include <openssl/engine.h> |
49b26f54 | 28 | #include <openssl/trace.h> |
4ff1a526 | 29 | #include <internal/cryptlib.h> |
f9b3bff6 | 30 | |
852c2ed2 RS |
31 | DEFINE_STACK_OF(X509) |
32 | DEFINE_STACK_OF(SSL_COMP) | |
33 | DEFINE_STACK_OF_CONST(SSL_CIPHER) | |
34 | ||
597c51bc | 35 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
36 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
37 | ||
7ab09630 | 38 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 39 | static int key_exchange_expected(SSL *s); |
d45ba43d | 40 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 41 | WPACKET *pkt); |
ea262260 | 42 | |
61ae935a MC |
43 | /* |
44 | * Is a CertificateRequest message allowed at the moment or not? | |
45 | * | |
46 | * Return values are: | |
47 | * 1: Yes | |
48 | * 0: No | |
49 | */ | |
7ab09630 | 50 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
51 | { |
52 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 53 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
54 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
55 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
56 | return 0; |
57 | ||
58 | return 1; | |
59 | } | |
60 | ||
61 | /* | |
a455d0f6 | 62 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
63 | * |
64 | * Return values are: | |
65 | * 1: Yes | |
66 | * 0: No | |
67 | */ | |
a455d0f6 | 68 | static int key_exchange_expected(SSL *s) |
61ae935a | 69 | { |
555cbb32 | 70 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
71 | |
72 | /* | |
73 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 74 | * ciphersuite or for SRP |
61ae935a | 75 | */ |
a455d0f6 MC |
76 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
77 | | SSL_kSRP)) { | |
78 | return 1; | |
61ae935a MC |
79 | } |
80 | ||
a455d0f6 | 81 | return 0; |
61ae935a MC |
82 | } |
83 | ||
0f1e51ea MC |
84 | /* |
85 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
86 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
87 | * server. The message type that the server has sent is provided in |mt|. The | |
88 | * current state is in |s->statem.hand_state|. | |
89 | * | |
94ed2c67 MC |
90 | * Return values are 1 for success (transition allowed) and 0 on error |
91 | * (transition not allowed) | |
0f1e51ea MC |
92 | */ |
93 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
94 | { | |
95 | OSSL_STATEM *st = &s->statem; | |
96 | ||
97 | /* | |
98 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
99 | * yet negotiated TLSv1.3 at that point so that is handled by | |
100 | * ossl_statem_client_read_transition() | |
101 | */ | |
102 | ||
103 | switch (st->hand_state) { | |
104 | default: | |
105 | break; | |
106 | ||
3847d426 MC |
107 | case TLS_ST_CW_CLNT_HELLO: |
108 | /* | |
109 | * This must a ClientHello following a HelloRetryRequest, so the only | |
110 | * thing we can get now is a ServerHello. | |
111 | */ | |
112 | if (mt == SSL3_MT_SERVER_HELLO) { | |
113 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
114 | return 1; | |
115 | } | |
116 | break; | |
117 | ||
0f1e51ea | 118 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
119 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
120 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
121 | return 1; | |
122 | } | |
123 | break; | |
124 | ||
125 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 126 | if (s->hit) { |
92760c21 MC |
127 | if (mt == SSL3_MT_FINISHED) { |
128 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
129 | return 1; |
130 | } | |
131 | } else { | |
92760c21 MC |
132 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
133 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
134 | return 1; | |
f5ca0b04 MC |
135 | } |
136 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
137 | st->hand_state = TLS_ST_CR_CERT; |
138 | return 1; | |
139 | } | |
140 | } | |
141 | break; | |
142 | ||
92760c21 MC |
143 | case TLS_ST_CR_CERT_REQ: |
144 | if (mt == SSL3_MT_CERTIFICATE) { | |
145 | st->hand_state = TLS_ST_CR_CERT; | |
146 | return 1; | |
147 | } | |
148 | break; | |
149 | ||
0f1e51ea | 150 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
151 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
152 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
153 | return 1; | |
154 | } | |
155 | break; | |
156 | ||
157 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
158 | if (mt == SSL3_MT_FINISHED) { |
159 | st->hand_state = TLS_ST_CR_FINISHED; | |
160 | return 1; | |
161 | } | |
162 | break; | |
cc2455bf MC |
163 | |
164 | case TLS_ST_OK: | |
165 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
166 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
167 | return 1; | |
168 | } | |
e1c3de44 MC |
169 | if (mt == SSL3_MT_KEY_UPDATE) { |
170 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
171 | return 1; | |
172 | } | |
9d75dce3 | 173 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 174 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
9d75dce3 TS |
175 | # error TODO(DTLS1.3): Restore digest for PHA before adding message. |
176 | #endif | |
177 | if (!SSL_IS_DTLS(s) && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
178 | s->post_handshake_auth = SSL_PHA_REQUESTED; | |
179 | /* | |
180 | * In TLS, this is called before the message is added to the | |
181 | * digest. In DTLS, this is expected to be called after adding | |
182 | * to the digest. Either move the digest restore, or add the | |
183 | * message here after the swap, or do it after the clientFinished? | |
184 | */ | |
185 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
186 | /* SSLfatal() already called */ | |
187 | return 0; | |
188 | } | |
189 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
190 | return 1; | |
191 | } | |
192 | } | |
cc2455bf | 193 | break; |
0f1e51ea MC |
194 | } |
195 | ||
0f1e51ea | 196 | /* No valid transition found */ |
0f1e51ea MC |
197 | return 0; |
198 | } | |
199 | ||
61ae935a | 200 | /* |
8481f583 MC |
201 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
202 | * handshake state transitions when the client is reading messages from the | |
203 | * server. The message type that the server has sent is provided in |mt|. The | |
204 | * current state is in |s->statem.hand_state|. | |
61ae935a | 205 | * |
94ed2c67 MC |
206 | * Return values are 1 for success (transition allowed) and 0 on error |
207 | * (transition not allowed) | |
61ae935a | 208 | */ |
8481f583 | 209 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 210 | { |
d6f1a6e9 | 211 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 212 | int ske_expected; |
61ae935a | 213 | |
0f1e51ea | 214 | /* |
3847d426 MC |
215 | * Note that after writing the first ClientHello we don't know what version |
216 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 217 | */ |
f5ca0b04 | 218 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
219 | if (!ossl_statem_client13_read_transition(s, mt)) |
220 | goto err; | |
221 | return 1; | |
222 | } | |
0f1e51ea | 223 | |
a230b26e | 224 | switch (st->hand_state) { |
f3b3d7f0 RS |
225 | default: |
226 | break; | |
227 | ||
61ae935a MC |
228 | case TLS_ST_CW_CLNT_HELLO: |
229 | if (mt == SSL3_MT_SERVER_HELLO) { | |
230 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
231 | return 1; | |
232 | } | |
233 | ||
234 | if (SSL_IS_DTLS(s)) { | |
235 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
236 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
237 | return 1; | |
238 | } | |
239 | } | |
240 | break; | |
241 | ||
d7f8783f | 242 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
243 | /* |
244 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
245 | * data. The only thing allowed now is a ServerHello or a | |
246 | * HelloRetryRequest. | |
247 | */ | |
248 | if (mt == SSL3_MT_SERVER_HELLO) { | |
249 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
250 | return 1; | |
251 | } | |
4004ce5f MC |
252 | break; |
253 | ||
61ae935a MC |
254 | case TLS_ST_CR_SRVR_HELLO: |
255 | if (s->hit) { | |
aff8c126 | 256 | if (s->ext.ticket_expected) { |
61ae935a MC |
257 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
258 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
259 | return 1; | |
260 | } | |
261 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
262 | st->hand_state = TLS_ST_CR_CHANGE; | |
263 | return 1; | |
264 | } | |
265 | } else { | |
266 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
267 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
268 | return 1; | |
ad3819c2 | 269 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
270 | && s->ext.session_secret_cb != NULL |
271 | && s->session->ext.tick != NULL | |
a230b26e | 272 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
273 | /* |
274 | * Normally, we can tell if the server is resuming the session | |
275 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
276 | * the next server message after the ServerHello to determine if | |
277 | * the server is resuming. | |
278 | */ | |
279 | s->hit = 1; | |
280 | st->hand_state = TLS_ST_CR_CHANGE; | |
281 | return 1; | |
555cbb32 | 282 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 283 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
284 | if (mt == SSL3_MT_CERTIFICATE) { |
285 | st->hand_state = TLS_ST_CR_CERT; | |
286 | return 1; | |
287 | } | |
288 | } else { | |
a455d0f6 | 289 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
290 | /* SKE is optional for some PSK ciphersuites */ |
291 | if (ske_expected | |
555cbb32 | 292 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 293 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
294 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
295 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
296 | return 1; | |
297 | } | |
298 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
299 | && cert_req_allowed(s)) { |
300 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
301 | return 1; | |
a455d0f6 | 302 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
303 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
304 | return 1; | |
61ae935a MC |
305 | } |
306 | } | |
307 | } | |
308 | break; | |
309 | ||
310 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
311 | /* |
312 | * The CertificateStatus message is optional even if | |
aff8c126 | 313 | * |ext.status_expected| is set |
bb1aaab4 | 314 | */ |
aff8c126 | 315 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
316 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
317 | return 1; | |
a455d0f6 MC |
318 | } |
319 | /* Fall through */ | |
320 | ||
321 | case TLS_ST_CR_CERT_STATUS: | |
322 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 323 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 324 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 325 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
326 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
327 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
328 | return 1; | |
61ae935a | 329 | } |
672f3337 | 330 | goto err; |
61ae935a | 331 | } |
a455d0f6 | 332 | /* Fall through */ |
61ae935a | 333 | |
a455d0f6 MC |
334 | case TLS_ST_CR_KEY_EXCH: |
335 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
336 | if (cert_req_allowed(s)) { | |
61ae935a MC |
337 | st->hand_state = TLS_ST_CR_CERT_REQ; |
338 | return 1; | |
61ae935a | 339 | } |
672f3337 | 340 | goto err; |
61ae935a | 341 | } |
a455d0f6 | 342 | /* Fall through */ |
61ae935a MC |
343 | |
344 | case TLS_ST_CR_CERT_REQ: | |
345 | if (mt == SSL3_MT_SERVER_DONE) { | |
346 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
347 | return 1; | |
348 | } | |
349 | break; | |
350 | ||
351 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 352 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
353 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
354 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
355 | return 1; | |
356 | } | |
61ae935a MC |
357 | } else 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_SESSION_TICKET: | |
364 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
365 | st->hand_state = TLS_ST_CR_CHANGE; | |
366 | return 1; | |
367 | } | |
368 | break; | |
369 | ||
370 | case TLS_ST_CR_CHANGE: | |
371 | if (mt == SSL3_MT_FINISHED) { | |
372 | st->hand_state = TLS_ST_CR_FINISHED; | |
373 | return 1; | |
374 | } | |
375 | break; | |
c7f47786 MC |
376 | |
377 | case TLS_ST_OK: | |
4004ce5f | 378 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
379 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
380 | return 1; | |
381 | } | |
382 | break; | |
61ae935a MC |
383 | } |
384 | ||
672f3337 | 385 | err: |
61ae935a | 386 | /* No valid transition found */ |
f20404fc MC |
387 | if (SSL_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
388 | BIO *rbio; | |
389 | ||
390 | /* | |
391 | * CCS messages don't have a message sequence number so this is probably | |
392 | * because of an out-of-order CCS. We'll just drop it. | |
393 | */ | |
394 | s->init_num = 0; | |
395 | s->rwstate = SSL_READING; | |
396 | rbio = SSL_get_rbio(s); | |
397 | BIO_clear_retry_flags(rbio); | |
398 | BIO_set_retry_read(rbio); | |
399 | return 0; | |
400 | } | |
f63a17d6 MC |
401 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
402 | SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, | |
403 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
404 | return 0; |
405 | } | |
406 | ||
407 | /* | |
0f1e51ea MC |
408 | * ossl_statem_client13_write_transition() works out what handshake state to |
409 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
410 | * server. | |
0f1e51ea MC |
411 | */ |
412 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
413 | { | |
414 | OSSL_STATEM *st = &s->statem; | |
415 | ||
416 | /* | |
3847d426 MC |
417 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
418 | * TLSv1.3 yet at that point. They are handled by | |
419 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
420 | */ |
421 | switch (st->hand_state) { | |
e43e6b19 TS |
422 | default: |
423 | /* Shouldn't happen */ | |
424 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
425 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
426 | ERR_R_INTERNAL_ERROR); | |
427 | return WRITE_TRAN_ERROR; | |
428 | ||
9d75dce3 TS |
429 | case TLS_ST_CR_CERT_REQ: |
430 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
431 | st->hand_state = TLS_ST_CW_CERT; | |
432 | return WRITE_TRAN_CONTINUE; | |
433 | } | |
1bf4cb0f MC |
434 | /* |
435 | * We should only get here if we received a CertificateRequest after | |
436 | * we already sent close_notify | |
437 | */ | |
438 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
439 | /* Shouldn't happen - same as default case */ | |
440 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
441 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
442 | ERR_R_INTERNAL_ERROR); | |
443 | return WRITE_TRAN_ERROR; | |
444 | } | |
445 | st->hand_state = TLS_ST_OK; | |
446 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 447 | |
92760c21 | 448 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
449 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
450 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 451 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 452 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 453 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 454 | st->hand_state = TLS_ST_CW_CHANGE; |
564547e4 | 455 | else |
555cbb32 | 456 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
564547e4 MC |
457 | : TLS_ST_CW_FINISHED; |
458 | return WRITE_TRAN_CONTINUE; | |
459 | ||
d7f8783f | 460 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
461 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
462 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
463 | return WRITE_TRAN_CONTINUE; | |
464 | } | |
465 | /* Fall through */ | |
466 | ||
467 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 468 | case TLS_ST_CW_CHANGE: |
555cbb32 | 469 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 470 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
471 | return WRITE_TRAN_CONTINUE; |
472 | ||
473 | case TLS_ST_CW_CERT: | |
474 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 475 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 476 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
477 | return WRITE_TRAN_CONTINUE; |
478 | ||
479 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
480 | st->hand_state = TLS_ST_CW_FINISHED; |
481 | return WRITE_TRAN_CONTINUE; | |
482 | ||
e1c3de44 | 483 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 484 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 485 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 486 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 487 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 488 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
489 | |
490 | case TLS_ST_OK: | |
9412b3ad MC |
491 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
492 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
493 | return WRITE_TRAN_CONTINUE; | |
494 | } | |
495 | ||
496 | /* Try to read from the server instead */ | |
cc2455bf | 497 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
498 | } |
499 | } | |
500 | ||
501 | /* | |
502 | * ossl_statem_client_write_transition() works out what handshake state to | |
503 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 504 | */ |
8481f583 | 505 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 506 | { |
d6f1a6e9 | 507 | OSSL_STATEM *st = &s->statem; |
61ae935a | 508 | |
0f1e51ea MC |
509 | /* |
510 | * Note that immediately before/after a ClientHello we don't know what | |
511 | * version we are going to negotiate yet, so we don't take this branch until | |
512 | * later | |
513 | */ | |
f5ca0b04 | 514 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
515 | return ossl_statem_client13_write_transition(s); |
516 | ||
a230b26e | 517 | switch (st->hand_state) { |
f3b3d7f0 RS |
518 | default: |
519 | /* Shouldn't happen */ | |
a2c2e000 MC |
520 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
521 | SSL_F_OSSL_STATEM_CLIENT_WRITE_TRANSITION, | |
522 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
523 | return WRITE_TRAN_ERROR; |
524 | ||
a230b26e | 525 | case TLS_ST_OK: |
c7f47786 MC |
526 | if (!s->renegotiate) { |
527 | /* | |
528 | * We haven't requested a renegotiation ourselves so we must have | |
529 | * received a message from the server. Better read it. | |
530 | */ | |
531 | return WRITE_TRAN_FINISHED; | |
532 | } | |
018fcbec BE |
533 | /* Renegotiation */ |
534 | /* fall thru */ | |
a230b26e EK |
535 | case TLS_ST_BEFORE: |
536 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
537 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 538 | |
a230b26e | 539 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
540 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
541 | /* | |
542 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
543 | * actually selected a version yet. | |
544 | */ | |
066904cc MC |
545 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
546 | st->hand_state = TLS_ST_CW_CHANGE; | |
547 | else | |
548 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
549 | return WRITE_TRAN_CONTINUE; |
550 | } | |
a230b26e EK |
551 | /* |
552 | * No transition at the end of writing because we don't know what | |
553 | * we will be sent | |
554 | */ | |
555 | return WRITE_TRAN_FINISHED; | |
61ae935a | 556 | |
597c51bc | 557 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
558 | /* |
559 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
560 | * CCS unless middlebox compat mode is off, or we already issued one | |
561 | * because we did early data. | |
562 | */ | |
563 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
564 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
565 | st->hand_state = TLS_ST_CW_CHANGE; | |
566 | else | |
567 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
568 | return WRITE_TRAN_CONTINUE; |
569 | ||
d7f8783f | 570 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
571 | return WRITE_TRAN_FINISHED; |
572 | ||
a230b26e EK |
573 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
574 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
575 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 576 | |
a230b26e | 577 | case TLS_ST_CR_SRVR_DONE: |
555cbb32 | 578 | if (s->s3.tmp.cert_req) |
a230b26e EK |
579 | st->hand_state = TLS_ST_CW_CERT; |
580 | else | |
61ae935a | 581 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 582 | return WRITE_TRAN_CONTINUE; |
61ae935a | 583 | |
a230b26e EK |
584 | case TLS_ST_CW_CERT: |
585 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
586 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 587 | |
a230b26e EK |
588 | case TLS_ST_CW_KEY_EXCH: |
589 | /* | |
590 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
591 | * sent, but no verify packet is sent | |
592 | */ | |
593 | /* | |
594 | * XXX: For now, we do not support client authentication in ECDH | |
595 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
596 | * need to skip the certificate verify message when client's | |
597 | * ECDH public key is sent inside the client certificate. | |
598 | */ | |
555cbb32 | 599 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
600 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
601 | } else { | |
61ae935a | 602 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 603 | } |
555cbb32 | 604 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
605 | st->hand_state = TLS_ST_CW_CHANGE; |
606 | } | |
607 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 608 | |
a230b26e EK |
609 | case TLS_ST_CW_CERT_VRFY: |
610 | st->hand_state = TLS_ST_CW_CHANGE; | |
611 | return WRITE_TRAN_CONTINUE; | |
612 | ||
613 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
614 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
615 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
616 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
617 | st->hand_state = TLS_ST_EARLY_DATA; |
618 | } else { | |
61ae935a | 619 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 620 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 621 | #else |
555cbb32 | 622 | if (!SSL_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
623 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
624 | else | |
625 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 626 | #endif |
066904cc | 627 | } |
a230b26e | 628 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
629 | |
630 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
631 | case TLS_ST_CW_NEXT_PROTO: |
632 | st->hand_state = TLS_ST_CW_FINISHED; | |
633 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
634 | #endif |
635 | ||
a230b26e EK |
636 | case TLS_ST_CW_FINISHED: |
637 | if (s->hit) { | |
638 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
639 | return WRITE_TRAN_CONTINUE; |
640 | } else { | |
641 | return WRITE_TRAN_FINISHED; | |
642 | } | |
61ae935a | 643 | |
a230b26e EK |
644 | case TLS_ST_CR_FINISHED: |
645 | if (s->hit) { | |
646 | st->hand_state = TLS_ST_CW_CHANGE; | |
647 | return WRITE_TRAN_CONTINUE; | |
648 | } else { | |
649 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
650 | return WRITE_TRAN_CONTINUE; |
651 | } | |
c7f47786 MC |
652 | |
653 | case TLS_ST_CR_HELLO_REQ: | |
654 | /* | |
655 | * If we can renegotiate now then do so, otherwise wait for a more | |
656 | * convenient time. | |
657 | */ | |
658 | if (ssl3_renegotiate_check(s, 1)) { | |
659 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 660 | /* SSLfatal() already called */ |
c7f47786 MC |
661 | return WRITE_TRAN_ERROR; |
662 | } | |
663 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
664 | return WRITE_TRAN_CONTINUE; | |
665 | } | |
666 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 667 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
668 | } |
669 | } | |
670 | ||
671 | /* | |
672 | * Perform any pre work that needs to be done prior to sending a message from | |
673 | * the client to the server. | |
674 | */ | |
8481f583 | 675 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 676 | { |
d6f1a6e9 | 677 | OSSL_STATEM *st = &s->statem; |
61ae935a | 678 | |
a230b26e | 679 | switch (st->hand_state) { |
f3b3d7f0 RS |
680 | default: |
681 | /* No pre work to be done */ | |
682 | break; | |
683 | ||
61ae935a MC |
684 | case TLS_ST_CW_CLNT_HELLO: |
685 | s->shutdown = 0; | |
686 | if (SSL_IS_DTLS(s)) { | |
687 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 688 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 689 | /* SSLfatal() already called */ |
2c4a056f MC |
690 | return WORK_ERROR; |
691 | } | |
61ae935a MC |
692 | } |
693 | break; | |
694 | ||
61ae935a MC |
695 | case TLS_ST_CW_CHANGE: |
696 | if (SSL_IS_DTLS(s)) { | |
697 | if (s->hit) { | |
698 | /* | |
699 | * We're into the last flight so we don't retransmit these | |
700 | * messages unless we need to. | |
701 | */ | |
702 | st->use_timer = 0; | |
703 | } | |
704 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
705 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
706 | /* Calls SSLfatal() as required */ | |
61ae935a | 707 | return dtls_wait_for_dry(s); |
a2c2e000 | 708 | } |
61ae935a MC |
709 | #endif |
710 | } | |
f3b3d7f0 | 711 | break; |
61ae935a | 712 | |
d7f8783f | 713 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
714 | /* |
715 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
716 | * attempt to write early data before calling SSL_read() then we press | |
717 | * on with the handshake. Otherwise we pause here. | |
718 | */ | |
719 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
720 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
721 | return WORK_FINISHED_CONTINUE; | |
722 | /* Fall through */ | |
723 | ||
724 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
725 | return tls_finish_handshake(s, wst, 0, 1); |
726 | ||
61ae935a | 727 | case TLS_ST_OK: |
a2c2e000 | 728 | /* Calls SSLfatal() as required */ |
2a8db717 | 729 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
730 | } |
731 | ||
732 | return WORK_FINISHED_CONTINUE; | |
733 | } | |
734 | ||
735 | /* | |
736 | * Perform any work that needs to be done after sending a message from the | |
737 | * client to the server. | |
738 | */ | |
8481f583 | 739 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 740 | { |
d6f1a6e9 | 741 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
742 | |
743 | s->init_num = 0; | |
744 | ||
a230b26e | 745 | switch (st->hand_state) { |
f3b3d7f0 RS |
746 | default: |
747 | /* No post work to be done */ | |
748 | break; | |
749 | ||
61ae935a | 750 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 751 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 752 | && s->max_early_data > 0) { |
6cb42265 MC |
753 | /* |
754 | * We haven't selected TLSv1.3 yet so we don't call the change | |
755 | * cipher state function associated with the SSL_METHOD. Instead | |
756 | * we call tls13_change_cipher_state() directly. | |
757 | */ | |
5cc807da | 758 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
759 | if (!tls13_change_cipher_state(s, |
760 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
761 | /* SSLfatal() already called */ | |
762 | return WORK_ERROR; | |
763 | } | |
a2c2e000 | 764 | } |
5cc807da MC |
765 | /* else we're in compat mode so we delay flushing until after CCS */ |
766 | } else if (!statem_flush(s)) { | |
767 | return WORK_MORE_A; | |
768 | } | |
769 | ||
770 | if (SSL_IS_DTLS(s)) { | |
771 | /* Treat the next message as the first packet */ | |
772 | s->first_packet = 1; | |
6cb42265 | 773 | } |
61ae935a MC |
774 | break; |
775 | ||
ef6c191b MC |
776 | case TLS_ST_CW_END_OF_EARLY_DATA: |
777 | /* | |
778 | * We set the enc_write_ctx back to NULL because we may end up writing | |
779 | * in cleartext again if we get a HelloRetryRequest from the server. | |
780 | */ | |
781 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
782 | s->enc_write_ctx = NULL; | |
783 | break; | |
784 | ||
61ae935a | 785 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
786 | if (tls_client_key_exchange_post_work(s) == 0) { |
787 | /* SSLfatal() already called */ | |
61ae935a | 788 | return WORK_ERROR; |
a2c2e000 | 789 | } |
61ae935a MC |
790 | break; |
791 | ||
792 | case TLS_ST_CW_CHANGE: | |
318d3c0e | 793 | if (SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING) |
4d02f870 | 794 | break; |
066904cc MC |
795 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
796 | && s->max_early_data > 0) { | |
797 | /* | |
798 | * We haven't selected TLSv1.3 yet so we don't call the change | |
799 | * cipher state function associated with the SSL_METHOD. Instead | |
800 | * we call tls13_change_cipher_state() directly. | |
801 | */ | |
802 | if (!tls13_change_cipher_state(s, | |
803 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
804 | return WORK_ERROR; | |
805 | break; | |
806 | } | |
555cbb32 | 807 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
808 | #ifdef OPENSSL_NO_COMP |
809 | s->session->compress_meth = 0; | |
810 | #else | |
555cbb32 | 811 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
812 | s->session->compress_meth = 0; |
813 | else | |
555cbb32 | 814 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 815 | #endif |
a2c2e000 MC |
816 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
817 | /* SSLfatal() already called */ | |
61ae935a | 818 | return WORK_ERROR; |
a2c2e000 | 819 | } |
61ae935a MC |
820 | |
821 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
822 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
823 | /* SSLfatal() already called */ | |
61ae935a | 824 | return WORK_ERROR; |
a2c2e000 | 825 | } |
61ae935a MC |
826 | |
827 | if (SSL_IS_DTLS(s)) { | |
828 | #ifndef OPENSSL_NO_SCTP | |
829 | if (s->hit) { | |
830 | /* | |
831 | * Change to new shared key of SCTP-Auth, will be ignored if | |
832 | * no SCTP used. | |
833 | */ | |
834 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
835 | 0, NULL); | |
836 | } | |
837 | #endif | |
838 | ||
839 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
840 | } | |
841 | break; | |
842 | ||
843 | case TLS_ST_CW_FINISHED: | |
844 | #ifndef OPENSSL_NO_SCTP | |
845 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
846 | /* | |
847 | * Change to new shared key of SCTP-Auth, will be ignored if | |
848 | * no SCTP used. | |
849 | */ | |
850 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
851 | 0, NULL); | |
852 | } | |
853 | #endif | |
854 | if (statem_flush(s) != 1) | |
855 | return WORK_MORE_B; | |
92760c21 MC |
856 | |
857 | if (SSL_IS_TLS13(s)) { | |
9d75dce3 | 858 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
859 | /* SSLfatal() already called */ |
860 | return WORK_ERROR; | |
861 | } | |
9d75dce3 TS |
862 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
863 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
864 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
865 | /* SSLfatal() already called */ | |
866 | return WORK_ERROR; | |
867 | } | |
868 | } | |
92760c21 | 869 | } |
61ae935a | 870 | break; |
9412b3ad MC |
871 | |
872 | case TLS_ST_CW_KEY_UPDATE: | |
873 | if (statem_flush(s) != 1) | |
874 | return WORK_MORE_A; | |
a2c2e000 MC |
875 | if (!tls13_update_key(s, 1)) { |
876 | /* SSLfatal() already called */ | |
57389a32 | 877 | return WORK_ERROR; |
a2c2e000 | 878 | } |
9412b3ad | 879 | break; |
61ae935a MC |
880 | } |
881 | ||
882 | return WORK_FINISHED_CONTINUE; | |
883 | } | |
884 | ||
885 | /* | |
6392fb8e MC |
886 | * Get the message construction function and message type for sending from the |
887 | * client | |
61ae935a MC |
888 | * |
889 | * Valid return values are: | |
890 | * 1: Success | |
891 | * 0: Error | |
892 | */ | |
6392fb8e | 893 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 894 | confunc_f *confunc, int *mt) |
61ae935a | 895 | { |
d6f1a6e9 | 896 | OSSL_STATEM *st = &s->statem; |
61ae935a | 897 | |
4a01c59f MC |
898 | switch (st->hand_state) { |
899 | default: | |
900 | /* Shouldn't happen */ | |
f63a17d6 MC |
901 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
902 | SSL_F_OSSL_STATEM_CLIENT_CONSTRUCT_MESSAGE, | |
903 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
904 | return 0; |
905 | ||
906 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 907 | if (SSL_IS_DTLS(s)) |
6392fb8e | 908 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 909 | else |
6392fb8e MC |
910 | *confunc = tls_construct_change_cipher_spec; |
911 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
912 | break; |
913 | ||
914 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
915 | *confunc = tls_construct_client_hello; |
916 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
917 | break; |
918 | ||
ef6c191b MC |
919 | case TLS_ST_CW_END_OF_EARLY_DATA: |
920 | *confunc = tls_construct_end_of_early_data; | |
921 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
922 | break; | |
923 | ||
924 | case TLS_ST_PENDING_EARLY_DATA_END: | |
925 | *confunc = NULL; | |
926 | *mt = SSL3_MT_DUMMY; | |
927 | break; | |
928 | ||
4a01c59f | 929 | case TLS_ST_CW_CERT: |
6392fb8e MC |
930 | *confunc = tls_construct_client_certificate; |
931 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
932 | break; |
933 | ||
934 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
935 | *confunc = tls_construct_client_key_exchange; |
936 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
937 | break; |
938 | ||
939 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 940 | *confunc = tls_construct_cert_verify; |
6392fb8e | 941 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 942 | break; |
61ae935a MC |
943 | |
944 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 945 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
946 | *confunc = tls_construct_next_proto; |
947 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 948 | break; |
61ae935a | 949 | #endif |
4a01c59f | 950 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
951 | *confunc = tls_construct_finished; |
952 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 953 | break; |
9412b3ad MC |
954 | |
955 | case TLS_ST_CW_KEY_UPDATE: | |
956 | *confunc = tls_construct_key_update; | |
957 | *mt = SSL3_MT_KEY_UPDATE; | |
958 | break; | |
4a01c59f | 959 | } |
5923ad4b | 960 | |
5923ad4b | 961 | return 1; |
61ae935a MC |
962 | } |
963 | ||
964 | /* | |
965 | * Returns the maximum allowed length for the current message that we are | |
966 | * reading. Excludes the message header. | |
967 | */ | |
eda75751 | 968 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 969 | { |
d6f1a6e9 | 970 | OSSL_STATEM *st = &s->statem; |
61ae935a | 971 | |
a230b26e | 972 | switch (st->hand_state) { |
f3b3d7f0 RS |
973 | default: |
974 | /* Shouldn't happen */ | |
975 | return 0; | |
976 | ||
a230b26e EK |
977 | case TLS_ST_CR_SRVR_HELLO: |
978 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 979 | |
a230b26e EK |
980 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
981 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 982 | |
a230b26e EK |
983 | case TLS_ST_CR_CERT: |
984 | return s->max_cert_list; | |
61ae935a | 985 | |
2c5dfdc3 MC |
986 | case TLS_ST_CR_CERT_VRFY: |
987 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
988 | ||
a230b26e EK |
989 | case TLS_ST_CR_CERT_STATUS: |
990 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 991 | |
a230b26e EK |
992 | case TLS_ST_CR_KEY_EXCH: |
993 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 994 | |
a230b26e EK |
995 | case TLS_ST_CR_CERT_REQ: |
996 | /* | |
997 | * Set to s->max_cert_list for compatibility with previous releases. In | |
998 | * practice these messages can get quite long if servers are configured | |
999 | * to provide a long list of acceptable CAs | |
1000 | */ | |
1001 | return s->max_cert_list; | |
61ae935a | 1002 | |
a230b26e EK |
1003 | case TLS_ST_CR_SRVR_DONE: |
1004 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 1005 | |
a230b26e EK |
1006 | case TLS_ST_CR_CHANGE: |
1007 | if (s->version == DTLS1_BAD_VER) | |
1008 | return 3; | |
1009 | return CCS_MAX_LENGTH; | |
61ae935a | 1010 | |
a230b26e EK |
1011 | case TLS_ST_CR_SESSION_TICKET: |
1012 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1013 | |
a230b26e EK |
1014 | case TLS_ST_CR_FINISHED: |
1015 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1016 | |
1017 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1018 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1019 | |
1020 | case TLS_ST_CR_KEY_UPDATE: | |
1021 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1022 | } |
61ae935a MC |
1023 | } |
1024 | ||
1025 | /* | |
1026 | * Process a message that the client has been received from the server. | |
1027 | */ | |
8481f583 | 1028 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 1029 | { |
d6f1a6e9 | 1030 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1031 | |
a230b26e | 1032 | switch (st->hand_state) { |
f3b3d7f0 RS |
1033 | default: |
1034 | /* Shouldn't happen */ | |
a2c2e000 MC |
1035 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1036 | SSL_F_OSSL_STATEM_CLIENT_PROCESS_MESSAGE, | |
1037 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1038 | return MSG_PROCESS_ERROR; |
1039 | ||
a230b26e EK |
1040 | case TLS_ST_CR_SRVR_HELLO: |
1041 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1042 | |
a230b26e EK |
1043 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1044 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1045 | |
a230b26e EK |
1046 | case TLS_ST_CR_CERT: |
1047 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1048 | |
2c5dfdc3 MC |
1049 | case TLS_ST_CR_CERT_VRFY: |
1050 | return tls_process_cert_verify(s, pkt); | |
1051 | ||
a230b26e EK |
1052 | case TLS_ST_CR_CERT_STATUS: |
1053 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1054 | |
a230b26e EK |
1055 | case TLS_ST_CR_KEY_EXCH: |
1056 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1057 | |
a230b26e EK |
1058 | case TLS_ST_CR_CERT_REQ: |
1059 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1060 | |
a230b26e EK |
1061 | case TLS_ST_CR_SRVR_DONE: |
1062 | return tls_process_server_done(s, pkt); | |
61ae935a | 1063 | |
a230b26e EK |
1064 | case TLS_ST_CR_CHANGE: |
1065 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1066 | |
a230b26e EK |
1067 | case TLS_ST_CR_SESSION_TICKET: |
1068 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1069 | |
a230b26e EK |
1070 | case TLS_ST_CR_FINISHED: |
1071 | return tls_process_finished(s, pkt); | |
e46f2334 | 1072 | |
c7f47786 MC |
1073 | case TLS_ST_CR_HELLO_REQ: |
1074 | return tls_process_hello_req(s, pkt); | |
1075 | ||
e46f2334 MC |
1076 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1077 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1078 | |
1079 | case TLS_ST_CR_KEY_UPDATE: | |
1080 | return tls_process_key_update(s, pkt); | |
61ae935a | 1081 | } |
61ae935a MC |
1082 | } |
1083 | ||
1084 | /* | |
1085 | * Perform any further processing required following the receipt of a message | |
1086 | * from the server | |
1087 | */ | |
8481f583 | 1088 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1089 | { |
d6f1a6e9 | 1090 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1091 | |
a230b26e | 1092 | switch (st->hand_state) { |
f3b3d7f0 RS |
1093 | default: |
1094 | /* Shouldn't happen */ | |
a2c2e000 MC |
1095 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1096 | SSL_F_OSSL_STATEM_CLIENT_POST_PROCESS_MESSAGE, | |
1097 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1098 | return WORK_ERROR; |
1099 | ||
e4562014 | 1100 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1101 | case TLS_ST_CR_CERT_REQ: |
1102 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1103 | } |
61ae935a MC |
1104 | } |
1105 | ||
7cea05dc | 1106 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1107 | { |
2c7b4dbc | 1108 | unsigned char *p; |
ec60ccc1 MC |
1109 | size_t sess_id_len; |
1110 | int i, protverr; | |
09b6c2ef | 1111 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1112 | SSL_COMP *comp; |
1113 | #endif | |
b9908bf9 | 1114 | SSL_SESSION *sess = s->session; |
a5816a5a | 1115 | unsigned char *session_id; |
0f113f3e | 1116 | |
b9908bf9 | 1117 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1118 | protverr = ssl_set_client_hello_version(s); |
1119 | if (protverr != 0) { | |
f63a17d6 MC |
1120 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1121 | protverr); | |
7cea05dc | 1122 | return 0; |
4fa52141 | 1123 | } |
0f113f3e | 1124 | |
e586eac8 | 1125 | if (sess == NULL |
4fd12788 | 1126 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1127 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1128 | if (s->hello_retry_request == SSL_HRR_NONE |
1129 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1130 | /* SSLfatal() already called */ |
7cea05dc | 1131 | return 0; |
f63a17d6 | 1132 | } |
b9908bf9 MC |
1133 | } |
1134 | /* else use the pre-loaded session */ | |
0f113f3e | 1135 | |
555cbb32 | 1136 | p = s->s3.client_random; |
0f113f3e | 1137 | |
b9908bf9 MC |
1138 | /* |
1139 | * for DTLS if client_random is initialized, reuse it, we are | |
1140 | * required to use same upon reply to HelloVerify | |
1141 | */ | |
1142 | if (SSL_IS_DTLS(s)) { | |
1143 | size_t idx; | |
1144 | i = 1; | |
555cbb32 | 1145 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1146 | if (p[idx]) { |
1147 | i = 0; | |
1148 | break; | |
0f113f3e | 1149 | } |
0f113f3e | 1150 | } |
751b26b1 | 1151 | } else { |
fc7129dc | 1152 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1153 | } |
0f113f3e | 1154 | |
555cbb32 | 1155 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 MC |
1156 | DOWNGRADE_NONE) <= 0) { |
1157 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1158 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1159 | return 0; |
f63a17d6 | 1160 | } |
b9908bf9 | 1161 | |
b9908bf9 MC |
1162 | /*- |
1163 | * version indicates the negotiated version: for example from | |
1164 | * an SSLv2/v3 compatible client hello). The client_version | |
1165 | * field is the maximum version we permit and it is also | |
1166 | * used in RSA encrypted premaster secrets. Some servers can | |
1167 | * choke if we initially report a higher version then | |
1168 | * renegotiate to a lower one in the premaster secret. This | |
1169 | * didn't happen with TLS 1.0 as most servers supported it | |
1170 | * but it can with TLS 1.1 or later if the server only supports | |
1171 | * 1.0. | |
1172 | * | |
1173 | * Possible scenario with previous logic: | |
1174 | * 1. Client hello indicates TLS 1.2 | |
1175 | * 2. Server hello says TLS 1.0 | |
1176 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1177 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1178 | * 5. Server sends hello request to renegotiate. |
1179 | * 6. Client hello indicates TLS v1.0 as we now | |
1180 | * know that is maximum server supports. | |
1181 | * 7. Server chokes on RSA encrypted premaster secret | |
1182 | * containing version 1.0. | |
1183 | * | |
1184 | * For interoperability it should be OK to always use the | |
1185 | * maximum version we support in client hello and then rely | |
1186 | * on the checking of version to ensure the servers isn't | |
1187 | * being inconsistent: for example initially negotiating with | |
1188 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1189 | * client_version in client hello and not resetting it to | |
1190 | * the negotiated version. | |
cd998837 MC |
1191 | * |
1192 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1193 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1194 | */ |
7acb8b64 | 1195 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1196 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
1197 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1198 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1199 | return 0; |
2c7b4dbc | 1200 | } |
b9908bf9 MC |
1201 | |
1202 | /* Session ID */ | |
a5816a5a MC |
1203 | session_id = s->session->session_id; |
1204 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1205 | if (s->version == TLS1_3_VERSION | |
1206 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1207 | sess_id_len = sizeof(s->tmp_session_id); | |
1208 | s->tmp_session_id_len = sess_id_len; | |
1209 | session_id = s->tmp_session_id; | |
fc7129dc | 1210 | if (s->hello_retry_request == SSL_HRR_NONE |
8f21260b MC |
1211 | && RAND_bytes_ex(s->ctx->libctx, s->tmp_session_id, |
1212 | sess_id_len) <= 0) { | |
a5816a5a MC |
1213 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1214 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1215 | ERR_R_INTERNAL_ERROR); | |
1216 | return 0; | |
1217 | } | |
1218 | } else { | |
1219 | sess_id_len = 0; | |
1220 | } | |
1221 | } else { | |
dee0cc10 | 1222 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1223 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1224 | if (s->version == TLS1_3_VERSION) { |
1225 | s->tmp_session_id_len = sess_id_len; | |
1226 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1227 | } | |
1228 | } | |
dee0cc10 | 1229 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1230 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1231 | sess_id_len)) |
7cea05dc | 1232 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1233 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1234 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1235 | return 0; |
b9908bf9 | 1236 | } |
0f113f3e | 1237 | |
b9908bf9 MC |
1238 | /* cookie stuff for DTLS */ |
1239 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1240 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1241 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1242 | s->d1->cookie_len)) { |
f63a17d6 MC |
1243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1244 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1245 | return 0; |
0f113f3e | 1246 | } |
b9908bf9 MC |
1247 | } |
1248 | ||
1249 | /* Ciphers supported */ | |
7cea05dc | 1250 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1251 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1252 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1253 | return 0; |
2c7b4dbc | 1254 | } |
635c8f77 | 1255 | |
f63a17d6 MC |
1256 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1257 | /* SSLfatal() already called */ | |
7cea05dc | 1258 | return 0; |
f63a17d6 | 1259 | } |
7cea05dc | 1260 | if (!WPACKET_close(pkt)) { |
f63a17d6 MC |
1261 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1262 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1263 | return 0; |
b9908bf9 | 1264 | } |
0f113f3e | 1265 | |
b9908bf9 | 1266 | /* COMPRESSION */ |
7cea05dc | 1267 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
f63a17d6 MC |
1268 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1269 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1270 | return 0; |
2c7b4dbc MC |
1271 | } |
1272 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1273 | if (ssl_allow_compression(s) |
1274 | && s->ctx->comp_methods | |
555cbb32 | 1275 | && (SSL_IS_DTLS(s) || s->s3.tmp.max_ver < TLS1_3_VERSION)) { |
2c7b4dbc MC |
1276 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1277 | for (i = 0; i < compnum; i++) { | |
1278 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1279 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
f63a17d6 MC |
1280 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1281 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1282 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1283 | return 0; |
2c7b4dbc MC |
1284 | } |
1285 | } | |
b9908bf9 | 1286 | } |
09b6c2ef | 1287 | #endif |
2c7b4dbc | 1288 | /* Add the NULL method */ |
7cea05dc | 1289 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1290 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1291 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1292 | return 0; |
2c7b4dbc | 1293 | } |
761772d7 | 1294 | |
b9908bf9 | 1295 | /* TLS extensions */ |
f63a17d6 MC |
1296 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1297 | /* SSLfatal() already called */ | |
7cea05dc | 1298 | return 0; |
b9908bf9 | 1299 | } |
0f113f3e | 1300 | |
b9908bf9 | 1301 | return 1; |
0f113f3e | 1302 | } |
d02b48c6 | 1303 | |
be3583fa | 1304 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1305 | { |
cb150cbc | 1306 | size_t cookie_len; |
8ba708e5 MC |
1307 | PACKET cookiepkt; |
1308 | ||
1309 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1310 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
f63a17d6 MC |
1311 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1312 | SSL_R_LENGTH_MISMATCH); | |
1313 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1314 | } |
1315 | ||
1316 | cookie_len = PACKET_remaining(&cookiepkt); | |
1317 | if (cookie_len > sizeof(s->d1->cookie)) { | |
f63a17d6 MC |
1318 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1319 | SSL_R_LENGTH_TOO_LONG); | |
1320 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1321 | } |
1322 | ||
1323 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
f63a17d6 MC |
1324 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1325 | SSL_R_LENGTH_MISMATCH); | |
1326 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1327 | } |
1328 | s->d1->cookie_len = cookie_len; | |
1329 | ||
1330 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1331 | } |
1332 | ||
11c67eea | 1333 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1334 | { |
1335 | STACK_OF(SSL_CIPHER) *sk; | |
1336 | const SSL_CIPHER *c; | |
11c67eea MC |
1337 | int i; |
1338 | ||
1339 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1340 | if (c == NULL) { | |
1341 | /* unknown cipher */ | |
f63a17d6 MC |
1342 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1343 | SSL_R_UNKNOWN_CIPHER_RETURNED); | |
11c67eea MC |
1344 | return 0; |
1345 | } | |
1346 | /* | |
1347 | * If it is a disabled cipher we either didn't send it in client hello, | |
1348 | * or it's not allowed for the selected protocol. So we return an error. | |
1349 | */ | |
8af91fd9 | 1350 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
f63a17d6 MC |
1351 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1352 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1353 | return 0; |
1354 | } | |
1355 | ||
1356 | sk = ssl_get_ciphers_by_id(s); | |
1357 | i = sk_SSL_CIPHER_find(sk, c); | |
1358 | if (i < 0) { | |
1359 | /* we did not say we would use this cipher */ | |
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 | ||
555cbb32 TS |
1365 | if (SSL_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
1366 | && s->s3.tmp.new_cipher->id != c->id) { | |
11c67eea | 1367 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
f63a17d6 MC |
1368 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1369 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1370 | return 0; |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * Depending on the session caching (internal/external), the cipher | |
1375 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1376 | * set and use it for comparison. | |
1377 | */ | |
1378 | if (s->session->cipher != NULL) | |
1379 | s->session->cipher_id = s->session->cipher->id; | |
1380 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1381 | if (SSL_IS_TLS13(s)) { |
1382 | /* | |
1383 | * In TLSv1.3 it is valid for the server to select a different | |
1384 | * ciphersuite as long as the hash is the same. | |
1385 | */ | |
c8f6c28a MC |
1386 | if (ssl_md(s->ctx, c->algorithm2) |
1387 | != ssl_md(s->ctx, s->session->cipher->algorithm2)) { | |
f63a17d6 MC |
1388 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1389 | SSL_F_SET_CLIENT_CIPHERSUITE, | |
1390 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
a055a881 MC |
1391 | return 0; |
1392 | } | |
1393 | } else { | |
1394 | /* | |
1395 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1396 | * ciphersuite. | |
1397 | */ | |
f63a17d6 MC |
1398 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1399 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
a055a881 MC |
1400 | return 0; |
1401 | } | |
11c67eea | 1402 | } |
555cbb32 | 1403 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1404 | |
1405 | return 1; | |
1406 | } | |
1407 | ||
1408 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1409 | { | |
332eb390 | 1410 | PACKET session_id, extpkt; |
b9908bf9 | 1411 | size_t session_id_len; |
b6981744 | 1412 | const unsigned char *cipherchars; |
597c51bc | 1413 | int hrr = 0; |
b9908bf9 | 1414 | unsigned int compression; |
4fa52141 | 1415 | unsigned int sversion; |
3434f40b | 1416 | unsigned int context; |
332eb390 | 1417 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1418 | #ifndef OPENSSL_NO_COMP |
1419 | SSL_COMP *comp; | |
1420 | #endif | |
1421 | ||
4fa52141 | 1422 | if (!PACKET_get_net_2(pkt, &sversion)) { |
f63a17d6 MC |
1423 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1424 | SSL_R_LENGTH_MISMATCH); | |
1425 | goto err; | |
4fa52141 | 1426 | } |
50932c4a | 1427 | |
c3043dcd | 1428 | /* load the server random */ |
597c51bc MC |
1429 | if (s->version == TLS1_3_VERSION |
1430 | && sversion == TLS1_2_VERSION | |
1431 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1432 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
fc7129dc MC |
1433 | s->hello_retry_request = SSL_HRR_PENDING; |
1434 | hrr = 1; | |
597c51bc MC |
1435 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
1436 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1437 | SSL_R_LENGTH_MISMATCH); | |
1438 | goto err; | |
1439 | } | |
1440 | } else { | |
555cbb32 | 1441 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
597c51bc MC |
1442 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1443 | SSL_R_LENGTH_MISMATCH); | |
1444 | goto err; | |
1445 | } | |
c3043dcd MC |
1446 | } |
1447 | ||
88050dd1 MC |
1448 | /* Get the session-id. */ |
1449 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1450 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1451 | SSL_R_LENGTH_MISMATCH); | |
f63a17d6 | 1452 | goto err; |
0f113f3e | 1453 | } |
88050dd1 MC |
1454 | session_id_len = PACKET_remaining(&session_id); |
1455 | if (session_id_len > sizeof(s->session->session_id) | |
1456 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1457 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1458 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
f63a17d6 | 1459 | goto err; |
524420d8 MC |
1460 | } |
1461 | ||
73999b62 | 1462 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1463 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1464 | SSL_R_LENGTH_MISMATCH); | |
1465 | goto err; | |
fc5ce51d EK |
1466 | } |
1467 | ||
88050dd1 MC |
1468 | if (!PACKET_get_1(pkt, &compression)) { |
1469 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1470 | SSL_R_LENGTH_MISMATCH); | |
1471 | goto err; | |
4ff65f77 MC |
1472 | } |
1473 | ||
1474 | /* TLS extensions */ | |
597c51bc | 1475 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1476 | PACKET_null_init(&extpkt); |
26b9172a MC |
1477 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1478 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1479 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1480 | SSL_R_BAD_LENGTH); | |
1481 | goto err; | |
4ff65f77 MC |
1482 | } |
1483 | ||
597c51bc MC |
1484 | if (!hrr) { |
1485 | if (!tls_collect_extensions(s, &extpkt, | |
1486 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1487 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1488 | &extensions, NULL, 1)) { | |
1489 | /* SSLfatal() already called */ | |
1490 | goto err; | |
1491 | } | |
1492 | ||
1493 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1494 | /* SSLfatal() already called */ | |
1495 | goto err; | |
1496 | } | |
88050dd1 MC |
1497 | } |
1498 | ||
597c51bc MC |
1499 | if (SSL_IS_TLS13(s) || hrr) { |
1500 | if (compression != 0) { | |
1501 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1502 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1503 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1504 | goto err; | |
1505 | } | |
1506 | ||
1507 | if (session_id_len != s->tmp_session_id_len | |
1508 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1509 | session_id_len) != 0) { | |
1510 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1511 | SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INVALID_SESSION_ID); | |
1512 | goto err; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (hrr) { | |
1517 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1518 | /* SSLfatal() already called */ | |
1519 | goto err; | |
1520 | } | |
1521 | ||
1522 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1523 | } |
1524 | ||
1525 | /* | |
1526 | * Now we have chosen the version we need to check again that the extensions | |
1527 | * are appropriate for this version. | |
1528 | */ | |
fe874d27 MC |
1529 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1530 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 MC |
1531 | if (!tls_validate_all_contexts(s, context, extensions)) { |
1532 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1533 | SSL_R_BAD_EXTENSION); | |
1534 | goto err; | |
1535 | } | |
1536 | ||
4ff65f77 MC |
1537 | s->hit = 0; |
1538 | ||
1539 | if (SSL_IS_TLS13(s)) { | |
a5816a5a MC |
1540 | /* |
1541 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1542 | * the message must be on a record boundary. | |
1543 | */ | |
1544 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1545 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
1546 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1547 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1548 | goto err; | |
1549 | } | |
1550 | ||
4ff65f77 MC |
1551 | /* This will set s->hit if we are resuming */ |
1552 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1553 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1554 | extensions, NULL, 0)) { |
f63a17d6 MC |
1555 | /* SSLfatal() already called */ |
1556 | goto err; | |
1557 | } | |
4ff65f77 | 1558 | } else { |
8c1a5343 | 1559 | /* |
4ff65f77 MC |
1560 | * Check if we can resume the session based on external pre-shared |
1561 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1562 | * Resumption based on server-side state works with session IDs. | |
1563 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1564 | * works by overriding the SessionTicket extension at the application | |
1565 | * layer, and does not send a session ID. (We do not know whether | |
1566 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1567 | * ID alone is not a reliable indicator of session resumption, so we | |
1568 | * first check if we can resume, and later peek at the next handshake | |
1569 | * message to see if the server wants to resume. | |
8c1a5343 | 1570 | */ |
4ff65f77 MC |
1571 | if (s->version >= TLS1_VERSION |
1572 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1573 | const SSL_CIPHER *pref_cipher = NULL; | |
1574 | /* | |
1575 | * s->session->master_key_length is a size_t, but this is an int for | |
1576 | * backwards compat reasons | |
1577 | */ | |
1578 | int master_key_length; | |
1579 | master_key_length = sizeof(s->session->master_key); | |
1580 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1581 | &master_key_length, | |
1582 | NULL, &pref_cipher, | |
1583 | s->ext.session_secret_cb_arg) | |
1584 | && master_key_length > 0) { | |
1585 | s->session->master_key_length = master_key_length; | |
1586 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1587 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1588 | } else { |
f63a17d6 MC |
1589 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1590 | SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1591 | goto err; | |
4ff65f77 | 1592 | } |
0f113f3e | 1593 | } |
4ff65f77 MC |
1594 | |
1595 | if (session_id_len != 0 | |
1596 | && session_id_len == s->session->session_id_length | |
1597 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1598 | session_id_len) == 0) | |
1599 | s->hit = 1; | |
50932c4a MC |
1600 | } |
1601 | ||
4ff65f77 | 1602 | if (s->hit) { |
0f113f3e | 1603 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1604 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1605 | /* actually a client application bug */ |
f63a17d6 MC |
1606 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1607 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1608 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1609 | goto err; | |
0f113f3e | 1610 | } |
6e3d0153 | 1611 | } else { |
0f113f3e | 1612 | /* |
6e3d0153 | 1613 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1614 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1615 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1616 | * so the PAC-based session secret is always preserved. It'll be | |
1617 | * overwritten if the server refuses resumption. | |
0f113f3e | 1618 | */ |
c96ce52c | 1619 | if (s->session->session_id_length > 0) { |
9ef9088c | 1620 | tsan_counter(&s->session_ctx->stats.sess_miss); |
0f113f3e | 1621 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1622 | /* SSLfatal() already called */ |
1623 | goto err; | |
0f113f3e MC |
1624 | } |
1625 | } | |
50932c4a | 1626 | |
ccae4a15 | 1627 | s->session->ssl_version = s->version; |
a5816a5a MC |
1628 | /* |
1629 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1630 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1631 | * echo of what we originally sent in the ClientHello and should not be | |
1632 | * used for resumption. | |
1633 | */ | |
1634 | if (!SSL_IS_TLS13(s)) { | |
1635 | s->session->session_id_length = session_id_len; | |
1636 | /* session_id_len could be 0 */ | |
1637 | if (session_id_len > 0) | |
1638 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1639 | session_id_len); | |
1640 | } | |
0f113f3e | 1641 | } |
fc5ce51d | 1642 | |
ccae4a15 FI |
1643 | /* Session version and negotiated protocol version should match */ |
1644 | if (s->version != s->session->ssl_version) { | |
f63a17d6 MC |
1645 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1646 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1647 | goto err; | |
ccae4a15 | 1648 | } |
0f113f3e | 1649 | /* |
3eb2aff4 KR |
1650 | * Now that we know the version, update the check to see if it's an allowed |
1651 | * version. | |
1652 | */ | |
555cbb32 TS |
1653 | s->s3.tmp.min_ver = s->version; |
1654 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1655 | |
11c67eea | 1656 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1657 | /* SSLfatal() already called */ |
1658 | goto err; | |
0f113f3e MC |
1659 | } |
1660 | ||
09b6c2ef | 1661 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1662 | if (compression != 0) { |
f63a17d6 MC |
1663 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1664 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1665 | goto err; | |
0f113f3e MC |
1666 | } |
1667 | /* | |
1668 | * If compression is disabled we'd better not try to resume a session | |
1669 | * using compression. | |
1670 | */ | |
1671 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
1672 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1673 | SSL_R_INCONSISTENT_COMPRESSION); | |
1674 | goto err; | |
0f113f3e | 1675 | } |
09b6c2ef | 1676 | #else |
fc5ce51d | 1677 | if (s->hit && compression != s->session->compress_meth) { |
f63a17d6 | 1678 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
dd5a4279 | 1679 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1680 | goto err; |
0f113f3e | 1681 | } |
fc5ce51d | 1682 | if (compression == 0) |
0f113f3e MC |
1683 | comp = NULL; |
1684 | else if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1685 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1686 | SSL_R_COMPRESSION_DISABLED); | |
1687 | goto err; | |
fc5ce51d EK |
1688 | } else { |
1689 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1690 | } | |
0f113f3e | 1691 | |
fc5ce51d | 1692 | if (compression != 0 && comp == NULL) { |
f63a17d6 MC |
1693 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1694 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1695 | goto err; | |
0f113f3e | 1696 | } else { |
555cbb32 | 1697 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1698 | } |
09b6c2ef | 1699 | #endif |
761772d7 | 1700 | |
f63a17d6 MC |
1701 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1702 | /* SSLfatal() already called */ | |
1703 | goto err; | |
1704 | } | |
332eb390 | 1705 | |
8723588e MC |
1706 | #ifndef OPENSSL_NO_SCTP |
1707 | if (SSL_IS_DTLS(s) && s->hit) { | |
1708 | unsigned char sctpauthkey[64]; | |
1709 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1710 | size_t labellen; |
8723588e MC |
1711 | |
1712 | /* | |
1713 | * Add new shared key for SCTP-Auth, will be ignored if | |
1714 | * no SCTP used. | |
1715 | */ | |
141eb8c6 MC |
1716 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1717 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1718 | |
09d62b33 MT |
1719 | /* Don't include the terminating zero. */ |
1720 | labellen = sizeof(labelbuffer) - 1; | |
1721 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1722 | labellen += 1; | |
1723 | ||
8723588e | 1724 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e EK |
1725 | sizeof(sctpauthkey), |
1726 | labelbuffer, | |
09d62b33 | 1727 | labellen, NULL, 0, 0) <= 0) { |
f63a17d6 MC |
1728 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1729 | ERR_R_INTERNAL_ERROR); | |
1730 | goto err; | |
1731 | } | |
8723588e MC |
1732 | |
1733 | BIO_ctrl(SSL_get_wbio(s), | |
1734 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1735 | sizeof(sctpauthkey), sctpauthkey); | |
1736 | } | |
1737 | #endif | |
1738 | ||
92760c21 MC |
1739 | /* |
1740 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1741 | * we're done with this message | |
1742 | */ | |
1743 | if (SSL_IS_TLS13(s) | |
1744 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1745 | || !s->method->ssl3_enc->change_cipher_state(s, |
1746 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1747 | /* SSLfatal() already called */ |
1748 | goto err; | |
92760c21 MC |
1749 | } |
1750 | ||
1b0286a3 | 1751 | OPENSSL_free(extensions); |
b9908bf9 | 1752 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1753 | err: |
1b0286a3 | 1754 | OPENSSL_free(extensions); |
b9908bf9 | 1755 | return MSG_PROCESS_ERROR; |
0f113f3e | 1756 | } |
d02b48c6 | 1757 | |
597c51bc MC |
1758 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, |
1759 | PACKET *extpkt) | |
3847d426 | 1760 | { |
3847d426 | 1761 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1762 | |
d4504fe5 MC |
1763 | /* |
1764 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1765 | * should not be used. | |
1766 | */ | |
1767 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1768 | s->enc_write_ctx = NULL; | |
1769 | ||
597c51bc | 1770 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1771 | &extensions, NULL, 1) |
fe874d27 | 1772 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1773 | extensions, NULL, 0, 1)) { |
1774 | /* SSLfatal() already called */ | |
1775 | goto err; | |
1776 | } | |
3847d426 MC |
1777 | |
1778 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1779 | extensions = NULL; |
1780 | ||
f5d270ca BK |
1781 | if (s->ext.tls13_cookie_len == 0 |
1782 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
555cbb32 | 1783 | && s->s3.tmp.pkey != NULL |
f5d270ca BK |
1784 | #endif |
1785 | ) { | |
66d4bf6b MC |
1786 | /* |
1787 | * We didn't receive a cookie or a new key_share so the next | |
1788 | * ClientHello will not change | |
1789 | */ | |
f63a17d6 | 1790 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
597c51bc MC |
1791 | SSL_F_TLS_PROCESS_AS_HELLO_RETRY_REQUEST, |
1792 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
f63a17d6 | 1793 | goto err; |
66d4bf6b | 1794 | } |
3847d426 | 1795 | |
11c67eea MC |
1796 | /* |
1797 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1798 | * a synthetic message_hash in place of ClientHello1. | |
1799 | */ | |
43054d3d | 1800 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1801 | /* SSLfatal() already called */ |
1802 | goto err; | |
11c67eea MC |
1803 | } |
1804 | ||
1805 | /* | |
1806 | * Add this message to the Transcript Hash. Normally this is done | |
1807 | * automatically prior to the message processing stage. However due to the | |
1808 | * need to create the synthetic message hash, we defer that step until now | |
1809 | * for HRR messages. | |
1810 | */ | |
1811 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1812 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1813 | /* SSLfatal() already called */ |
1814 | goto err; | |
11c67eea MC |
1815 | } |
1816 | ||
3847d426 | 1817 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1818 | err: |
3847d426 MC |
1819 | OPENSSL_free(extensions); |
1820 | return MSG_PROCESS_ERROR; | |
1821 | } | |
1822 | ||
be3583fa | 1823 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1824 | { |
f63a17d6 | 1825 | int i; |
eb5fd03b | 1826 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
b9908bf9 MC |
1827 | unsigned long cert_list_len, cert_len; |
1828 | X509 *x = NULL; | |
b6981744 | 1829 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1830 | STACK_OF(X509) *sk = NULL; |
1831 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1832 | size_t chainidx, certidx; |
e96e0f8e | 1833 | unsigned int context = 0; |
7f6b466b | 1834 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1835 | |
1836 | if ((sk = sk_X509_new_null()) == NULL) { | |
f63a17d6 MC |
1837 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1838 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1839 | goto err; |
0f113f3e MC |
1840 | } |
1841 | ||
e96e0f8e MC |
1842 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1843 | || context != 0 | |
1844 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1845 | || PACKET_remaining(pkt) != cert_list_len |
1846 | || PACKET_remaining(pkt) == 0) { | |
f63a17d6 MC |
1847 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1848 | SSL_R_LENGTH_MISMATCH); | |
1849 | goto err; | |
0f113f3e | 1850 | } |
d805a57b | 1851 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1852 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1853 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
f63a17d6 MC |
1854 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1855 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1856 | SSL_R_CERT_LENGTH_MISMATCH); | |
1857 | goto err; | |
0f113f3e MC |
1858 | } |
1859 | ||
df758a85 | 1860 | certstart = certbytes; |
6725682d | 1861 | x = X509_new_with_libctx(s->ctx->libctx, s->ctx->propq); |
0f113f3e | 1862 | if (x == NULL) { |
6725682d SL |
1863 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1864 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
1865 | SSLerr(0, ERR_R_MALLOC_FAILURE); | |
1866 | goto err; | |
1867 | } | |
1868 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
1869 | cert_len) == NULL) { | |
f63a17d6 MC |
1870 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, |
1871 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1872 | goto err; | |
0f113f3e | 1873 | } |
6725682d | 1874 | |
df758a85 | 1875 | if (certbytes != (certstart + cert_len)) { |
f63a17d6 MC |
1876 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1877 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1878 | SSL_R_CERT_LENGTH_MISMATCH); | |
1879 | goto err; | |
0f113f3e | 1880 | } |
e96e0f8e MC |
1881 | |
1882 | if (SSL_IS_TLS13(s)) { | |
1883 | RAW_EXTENSION *rawexts = NULL; | |
1884 | PACKET extensions; | |
1885 | ||
1886 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
1887 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1888 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1889 | SSL_R_BAD_LENGTH); | |
1890 | goto err; | |
e96e0f8e | 1891 | } |
fe874d27 MC |
1892 | if (!tls_collect_extensions(s, &extensions, |
1893 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1894 | NULL, chainidx == 0) |
8e1634ec | 1895 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1896 | rawexts, x, chainidx, |
8e1634ec | 1897 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1898 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1899 | /* SSLfatal already called */ |
1900 | goto err; | |
5ee289ea MC |
1901 | } |
1902 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1903 | } |
1904 | ||
0f113f3e | 1905 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
1906 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1907 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1908 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1909 | goto err; |
0f113f3e MC |
1910 | } |
1911 | x = NULL; | |
0f113f3e MC |
1912 | } |
1913 | ||
1914 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1915 | /* |
1916 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1917 | * for client side verification of the server certificate to take place. | |
1918 | * However, historically the code has only checked that *any* flag is set | |
1919 | * to cause server verification to take place. Use of the other flags makes | |
1920 | * no sense in client mode. An attempt to clean up the semantics was | |
1921 | * reverted because at least one application *only* set | |
1922 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1923 | * server verification to take place, after the clean up it silently did | |
1924 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1925 | * sent to them because they are void functions. Therefore, we now use the | |
1926 | * (less clean) historic behaviour of performing validation if any flag is | |
1927 | * set. The *documented* interface remains the same. | |
1928 | */ | |
1929 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
c6d38183 | 1930 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 MC |
1931 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1932 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1933 | goto err; | |
0f113f3e MC |
1934 | } |
1935 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1936 | if (i > 1) { | |
f63a17d6 MC |
1937 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1938 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); | |
1939 | goto err; | |
0f113f3e MC |
1940 | } |
1941 | ||
c34b0f99 | 1942 | s->session->peer_chain = sk; |
0f113f3e MC |
1943 | /* |
1944 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1945 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1946 | */ |
1947 | x = sk_X509_value(sk, 0); | |
1948 | sk = NULL; | |
0f113f3e | 1949 | |
8382fd3a | 1950 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1951 | |
55a9a16f | 1952 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1953 | x = NULL; |
f63a17d6 MC |
1954 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1955 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1956 | goto err; | |
0f113f3e MC |
1957 | } |
1958 | ||
7f6b466b | 1959 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e | 1960 | x = NULL; |
f63a17d6 MC |
1961 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1962 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1963 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1964 | goto err; | |
0f113f3e | 1965 | } |
05b8486e DSH |
1966 | /* |
1967 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1968 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1969 | * type. | |
1970 | */ | |
1971 | if (!SSL_IS_TLS13(s)) { | |
555cbb32 | 1972 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e | 1973 | x = NULL; |
f63a17d6 MC |
1974 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1975 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1976 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1977 | goto err; | |
05b8486e | 1978 | } |
0f113f3e | 1979 | } |
7f6b466b | 1980 | s->session->peer_type = certidx; |
55a9a16f MC |
1981 | |
1982 | X509_free(s->session->peer); | |
05f0fb9f | 1983 | X509_up_ref(x); |
55a9a16f | 1984 | s->session->peer = x; |
0f113f3e | 1985 | s->session->verify_result = s->verify_result; |
0f113f3e | 1986 | x = NULL; |
2c5dfdc3 MC |
1987 | |
1988 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1989 | if (SSL_IS_TLS13(s) | |
1990 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1991 | sizeof(s->cert_verify_hash), | |
1992 | &s->cert_verify_hash_len)) { | |
f63a17d6 MC |
1993 | /* SSLfatal() already called */; |
1994 | goto err; | |
2c5dfdc3 MC |
1995 | } |
1996 | ||
b9908bf9 | 1997 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 1998 | |
cc273a93 | 1999 | err: |
0f113f3e MC |
2000 | X509_free(x); |
2001 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 2002 | return ret; |
0f113f3e | 2003 | } |
d02b48c6 | 2004 | |
a2c2e000 | 2005 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
2006 | { |
2007 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 2008 | PACKET psk_identity_hint; |
02a74590 | 2009 | |
7dc1c647 MC |
2010 | /* PSK ciphersuites are preceded by an identity hint */ |
2011 | ||
2012 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
a2c2e000 MC |
2013 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2014 | SSL_R_LENGTH_MISMATCH); | |
7dc1c647 MC |
2015 | return 0; |
2016 | } | |
2017 | ||
2018 | /* | |
2019 | * Store PSK identity hint for later use, hint is used in | |
2020 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2021 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2022 | * identity. | |
2023 | */ | |
2024 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2025 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2026 | SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, | |
2027 | SSL_R_DATA_LENGTH_TOO_LONG); | |
7dc1c647 MC |
2028 | return 0; |
2029 | } | |
02a74590 | 2030 | |
7dc1c647 MC |
2031 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2032 | OPENSSL_free(s->session->psk_identity_hint); | |
2033 | s->session->psk_identity_hint = NULL; | |
2034 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2035 | &s->session->psk_identity_hint)) { |
a2c2e000 MC |
2036 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2037 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 MC |
2038 | return 0; |
2039 | } | |
2040 | ||
2041 | return 1; | |
2042 | #else | |
a2c2e000 MC |
2043 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2044 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 | 2045 | return 0; |
02a74590 MC |
2046 | #endif |
2047 | } | |
2048 | ||
a2c2e000 | 2049 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2050 | { |
2051 | #ifndef OPENSSL_NO_SRP | |
2052 | PACKET prime, generator, salt, server_pub; | |
2053 | ||
2054 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2055 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2056 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2057 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
a2c2e000 MC |
2058 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2059 | SSL_R_LENGTH_MISMATCH); | |
25c6c10c MC |
2060 | return 0; |
2061 | } | |
2062 | ||
348240c6 | 2063 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
2064 | if ((s->srp_ctx.N = |
2065 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2066 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2067 | || (s->srp_ctx.g = |
2068 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2069 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2070 | || (s->srp_ctx.s = |
2071 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2072 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2073 | || (s->srp_ctx.B = |
2074 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2075 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
a2c2e000 MC |
2076 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2077 | ERR_R_BN_LIB); | |
25c6c10c MC |
2078 | return 0; |
2079 | } | |
2080 | ||
a2c2e000 MC |
2081 | if (!srp_verify_server_param(s)) { |
2082 | /* SSLfatal() already called */ | |
25c6c10c MC |
2083 | return 0; |
2084 | } | |
2085 | ||
2086 | /* We must check if there is a certificate */ | |
555cbb32 | 2087 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2088 | *pkey = X509_get0_pubkey(s->session->peer); |
2089 | ||
2090 | return 1; | |
2091 | #else | |
a2c2e000 MC |
2092 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2093 | ERR_R_INTERNAL_ERROR); | |
25c6c10c MC |
2094 | return 0; |
2095 | #endif | |
2096 | } | |
2097 | ||
a2c2e000 | 2098 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d MC |
2099 | { |
2100 | #ifndef OPENSSL_NO_DH | |
2101 | PACKET prime, generator, pub_key; | |
2102 | EVP_PKEY *peer_tmp = NULL; | |
2103 | ||
2104 | DH *dh = NULL; | |
2105 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
2106 | ||
26505153 RL |
2107 | int check_bits = 0; |
2108 | ||
e01a610d MC |
2109 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2110 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2111 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
a2c2e000 MC |
2112 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2113 | SSL_R_LENGTH_MISMATCH); | |
e01a610d MC |
2114 | return 0; |
2115 | } | |
2116 | ||
2117 | peer_tmp = EVP_PKEY_new(); | |
2118 | dh = DH_new(); | |
2119 | ||
2120 | if (peer_tmp == NULL || dh == NULL) { | |
a2c2e000 MC |
2121 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2122 | ERR_R_MALLOC_FAILURE); | |
e01a610d MC |
2123 | goto err; |
2124 | } | |
2125 | ||
348240c6 MC |
2126 | /* TODO(size_t): Convert these calls */ |
2127 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2128 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2129 | NULL); | |
2130 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2131 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2132 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
a2c2e000 MC |
2133 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2134 | ERR_R_BN_LIB); | |
e01a610d MC |
2135 | goto err; |
2136 | } | |
2137 | ||
69687aa8 | 2138 | /* test non-zero pubkey */ |
26505153 | 2139 | if (BN_is_zero(bnpub_key)) { |
a2c2e000 MC |
2140 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2141 | SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2142 | goto err; |
2143 | } | |
2144 | ||
2145 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
a2c2e000 MC |
2146 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2147 | ERR_R_BN_LIB); | |
e01a610d MC |
2148 | goto err; |
2149 | } | |
2150 | p = g = NULL; | |
2151 | ||
26505153 | 2152 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
a2c2e000 MC |
2153 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2154 | SSL_R_BAD_DH_VALUE); | |
26505153 RL |
2155 | goto err; |
2156 | } | |
2157 | ||
e01a610d | 2158 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
a2c2e000 MC |
2159 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2160 | ERR_R_BN_LIB); | |
e01a610d MC |
2161 | goto err; |
2162 | } | |
2163 | bnpub_key = NULL; | |
2164 | ||
e01a610d | 2165 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { |
a2c2e000 MC |
2166 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2167 | ERR_R_EVP_LIB); | |
e01a610d MC |
2168 | goto err; |
2169 | } | |
fe56d595 | 2170 | dh = NULL; |
e01a610d | 2171 | |
ada66e78 | 2172 | if (!ssl_security(s, SSL_SECOP_TMP_DH, EVP_PKEY_security_bits(peer_tmp), |
fe56d595 | 2173 | 0, EVP_PKEY_get0_DH(peer_tmp))) { |
ada66e78 P |
2174 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SKE_DHE, |
2175 | SSL_R_DH_KEY_TOO_SMALL); | |
2176 | goto err; | |
2177 | } | |
2178 | ||
555cbb32 | 2179 | s->s3.peer_tmp = peer_tmp; |
e01a610d MC |
2180 | |
2181 | /* | |
2182 | * FIXME: This makes assumptions about which ciphersuites come with | |
2183 | * public keys. We should have a less ad-hoc way of doing this | |
2184 | */ | |
555cbb32 | 2185 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2186 | *pkey = X509_get0_pubkey(s->session->peer); |
2187 | /* else anonymous DH, so no certificate or pkey. */ | |
2188 | ||
2189 | return 1; | |
2190 | ||
2191 | err: | |
2192 | BN_free(p); | |
2193 | BN_free(g); | |
2194 | BN_free(bnpub_key); | |
2195 | DH_free(dh); | |
2196 | EVP_PKEY_free(peer_tmp); | |
2197 | ||
2198 | return 0; | |
2199 | #else | |
a2c2e000 MC |
2200 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2201 | ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2202 | return 0; |
2203 | #endif | |
2204 | } | |
2205 | ||
a2c2e000 | 2206 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 MC |
2207 | { |
2208 | #ifndef OPENSSL_NO_EC | |
2209 | PACKET encoded_pt; | |
6447e818 | 2210 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2211 | |
2212 | /* | |
2213 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2214 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2215 | * ECParameters in this case is just three bytes. |
2216 | */ | |
6447e818 | 2217 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
a2c2e000 MC |
2218 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2219 | SSL_R_LENGTH_TOO_SHORT); | |
ff74aeb1 MC |
2220 | return 0; |
2221 | } | |
2222 | /* | |
6447e818 DSH |
2223 | * Check curve is named curve type and one of our preferences, if not |
2224 | * server has sent an invalid curve. | |
ff74aeb1 | 2225 | */ |
dcf8b01f MC |
2226 | if (curve_type != NAMED_CURVE_TYPE |
2227 | || !tls1_check_group_id(s, curve_id, 1)) { | |
a2c2e000 MC |
2228 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2229 | SSL_R_WRONG_CURVE); | |
ff74aeb1 MC |
2230 | return 0; |
2231 | } | |
2232 | ||
ada66e78 | 2233 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
a2c2e000 MC |
2234 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2235 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
ff74aeb1 MC |
2236 | return 0; |
2237 | } | |
2238 | ||
ff74aeb1 | 2239 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
a2c2e000 MC |
2240 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2241 | SSL_R_LENGTH_MISMATCH); | |
ff74aeb1 MC |
2242 | return 0; |
2243 | } | |
2244 | ||
555cbb32 | 2245 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3.peer_tmp, |
ec24630a DSH |
2246 | PACKET_data(&encoded_pt), |
2247 | PACKET_remaining(&encoded_pt))) { | |
a2c2e000 MC |
2248 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2249 | SSL_R_BAD_ECPOINT); | |
ff74aeb1 MC |
2250 | return 0; |
2251 | } | |
2252 | ||
2253 | /* | |
2254 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2255 | * ECParameters in the server key exchange message. We do support RSA | |
2256 | * and ECDSA. | |
2257 | */ | |
555cbb32 | 2258 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
ff74aeb1 | 2259 | *pkey = X509_get0_pubkey(s->session->peer); |
555cbb32 | 2260 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
ff74aeb1 MC |
2261 | *pkey = X509_get0_pubkey(s->session->peer); |
2262 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2263 | ||
2264 | return 1; | |
2265 | #else | |
a2c2e000 MC |
2266 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2267 | ERR_R_INTERNAL_ERROR); | |
ff74aeb1 MC |
2268 | return 0; |
2269 | #endif | |
2270 | } | |
2271 | ||
be3583fa | 2272 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2273 | { |
e1e588ac | 2274 | long alg_k; |
b9908bf9 | 2275 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2276 | EVP_MD_CTX *md_ctx = NULL; |
2277 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2278 | PACKET save_param_start, signature; |
b9908bf9 | 2279 | |
555cbb32 | 2280 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2281 | |
73999b62 | 2282 | save_param_start = *pkt; |
8d92c1f8 | 2283 | |
3260adf1 | 2284 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
555cbb32 TS |
2285 | EVP_PKEY_free(s->s3.peer_tmp); |
2286 | s->s3.peer_tmp = NULL; | |
3260adf1 | 2287 | #endif |
d02b48c6 | 2288 | |
7689082b | 2289 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2290 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2291 | /* SSLfatal() already called */ | |
7dc1c647 | 2292 | goto err; |
a2c2e000 | 2293 | } |
7689082b DSH |
2294 | } |
2295 | ||
2296 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2297 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2298 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2299 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2300 | /* SSLfatal() already called */ | |
0f113f3e | 2301 | goto err; |
a2c2e000 | 2302 | } |
e01a610d | 2303 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2304 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2305 | /* SSLfatal() already called */ | |
e01a610d | 2306 | goto err; |
a2c2e000 | 2307 | } |
ff74aeb1 | 2308 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2309 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2310 | /* SSLfatal() already called */ | |
ff74aeb1 | 2311 | goto err; |
a2c2e000 | 2312 | } |
0f113f3e | 2313 | } else if (alg_k) { |
a2c2e000 MC |
2314 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2315 | SSL_R_UNEXPECTED_MESSAGE); | |
e1e588ac | 2316 | goto err; |
0f113f3e | 2317 | } |
0f113f3e | 2318 | |
0f113f3e MC |
2319 | /* if it was signed, check the signature */ |
2320 | if (pkey != NULL) { | |
32942870 | 2321 | PACKET params; |
be8dba2c | 2322 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2323 | unsigned char *tbs; |
2324 | size_t tbslen; | |
2325 | int rv; | |
e1e588ac | 2326 | |
32942870 EK |
2327 | /* |
2328 | * |pkt| now points to the beginning of the signature, so the difference | |
2329 | * equals the length of the parameters. | |
2330 | */ | |
2331 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2332 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2333 | PACKET_remaining(pkt))) { |
a2c2e000 MC |
2334 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2335 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2336 | goto err; |
32942870 EK |
2337 | } |
2338 | ||
0f113f3e | 2339 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2340 | unsigned int sigalg; |
703bcee0 MC |
2341 | |
2342 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
a2c2e000 MC |
2343 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2344 | SSL_R_LENGTH_TOO_SHORT); | |
e1e588ac | 2345 | goto err; |
0f113f3e | 2346 | } |
f63a17d6 MC |
2347 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2348 | /* SSLfatal() already called */ | |
0f113f3e | 2349 | goto err; |
0f113f3e | 2350 | } |
f365a3e2 | 2351 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
a2c2e000 MC |
2352 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2353 | ERR_R_INTERNAL_ERROR); | |
f365a3e2 | 2354 | goto err; |
32942870 | 2355 | } |
0f113f3e | 2356 | |
c8f6c28a | 2357 | if (!tls1_lookup_md(s->ctx, s->s3.tmp.peer_sigalg, &md)) { |
a2c2e000 MC |
2358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2359 | ERR_R_INTERNAL_ERROR); | |
b2021556 DSH |
2360 | goto err; |
2361 | } | |
44f23cd2 | 2362 | if (SSL_USE_SIGALGS(s)) |
49b26f54 RL |
2363 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
2364 | md == NULL ? "n/a" : EVP_MD_name(md)); | |
f365a3e2 | 2365 | |
73999b62 MC |
2366 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2367 | || PACKET_remaining(pkt) != 0) { | |
a2c2e000 MC |
2368 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2369 | SSL_R_LENGTH_MISMATCH); | |
e1e588ac | 2370 | goto err; |
0f113f3e | 2371 | } |
e1e588ac MC |
2372 | |
2373 | md_ctx = EVP_MD_CTX_new(); | |
2374 | if (md_ctx == NULL) { | |
a2c2e000 | 2375 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
dd5a4279 | 2376 | ERR_R_MALLOC_FAILURE); |
e1e588ac | 2377 | goto err; |
0f113f3e | 2378 | } |
e1e588ac | 2379 | |
0ab18e79 SL |
2380 | if (EVP_DigestVerifyInit_with_libctx(md_ctx, &pctx, |
2381 | md == NULL ? NULL : EVP_MD_name(md), | |
2382 | s->ctx->libctx, s->ctx->propq, | |
2383 | pkey) <= 0) { | |
a2c2e000 MC |
2384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2385 | ERR_R_EVP_LIB); | |
fe3066ee MC |
2386 | goto err; |
2387 | } | |
5554facb | 2388 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2389 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2390 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2391 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
a2c2e000 MC |
2392 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2393 | SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
fe3066ee MC |
2394 | goto err; |
2395 | } | |
2396 | } | |
72ceb6a6 DSH |
2397 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2398 | PACKET_remaining(¶ms)); | |
2399 | if (tbslen == 0) { | |
f63a17d6 | 2400 | /* SSLfatal() already called */ |
e1e588ac | 2401 | goto err; |
192e4bbb | 2402 | } |
72ceb6a6 DSH |
2403 | |
2404 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2405 | PACKET_remaining(&signature), tbs, tbslen); | |
2406 | OPENSSL_free(tbs); | |
cfba0675 | 2407 | if (rv <= 0) { |
a2c2e000 MC |
2408 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2409 | SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2410 | goto err; |
0f113f3e | 2411 | } |
e1e588ac | 2412 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2413 | md_ctx = NULL; |
0f113f3e | 2414 | } else { |
7689082b | 2415 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2416 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2417 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2418 | /* Might be wrong key type, check it */ |
e1e588ac | 2419 | if (ssl3_check_cert_and_algorithm(s)) { |
a2c2e000 MC |
2420 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2421 | SSL_R_BAD_DATA); | |
e1e588ac | 2422 | } |
a2c2e000 | 2423 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2424 | goto err; |
2425 | } | |
2426 | /* still data left over */ | |
73999b62 | 2427 | if (PACKET_remaining(pkt) != 0) { |
a2c2e000 MC |
2428 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2429 | SSL_R_EXTRA_DATA_IN_MESSAGE); | |
e1e588ac | 2430 | goto err; |
0f113f3e MC |
2431 | } |
2432 | } | |
e1e588ac | 2433 | |
b9908bf9 | 2434 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2435 | err: |
fe3066ee | 2436 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2437 | return MSG_PROCESS_ERROR; |
0f113f3e | 2438 | } |
d02b48c6 | 2439 | |
be3583fa | 2440 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2441 | { |
32f66107 DSH |
2442 | size_t i; |
2443 | ||
2444 | /* Clear certificate validity flags */ | |
2445 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 2446 | s->s3.tmp.valid_flags[i] = 0; |
0f113f3e | 2447 | |
03f44b97 | 2448 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2449 | PACKET reqctx, extensions; |
2450 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2451 | |
1bf4cb0f MC |
2452 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2453 | /* | |
2454 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2455 | * post-handshake messages. We can't reasonably respond to this, so | |
2456 | * we just ignore it | |
2457 | */ | |
2458 | return MSG_PROCESS_FINISHED_READING; | |
2459 | } | |
2460 | ||
03f44b97 | 2461 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2462 | OPENSSL_free(s->s3.tmp.ctype); |
2463 | s->s3.tmp.ctype = NULL; | |
2464 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2465 | OPENSSL_free(s->pha_context); |
2466 | s->pha_context = NULL; | |
32f66107 | 2467 | |
9d75dce3 TS |
2468 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2469 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
f63a17d6 MC |
2470 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2471 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2472 | SSL_R_LENGTH_MISMATCH); | |
2473 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2474 | } |
32f66107 DSH |
2475 | |
2476 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
2477 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2478 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2479 | SSL_R_BAD_LENGTH); | |
2480 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2481 | } |
2482 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2483 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2484 | &rawexts, NULL, 1) |
fe874d27 | 2485 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2486 | rawexts, NULL, 0, 1)) { |
2487 | /* SSLfatal() already called */ | |
32f66107 | 2488 | OPENSSL_free(rawexts); |
f63a17d6 | 2489 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2490 | } |
2491 | OPENSSL_free(rawexts); | |
2492 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2493 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2494 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2495 | SSL_R_BAD_LENGTH); | |
2496 | return MSG_PROCESS_ERROR; | |
32f66107 | 2497 | } |
03f44b97 DSH |
2498 | } else { |
2499 | PACKET ctypes; | |
75c13e78 | 2500 | |
03f44b97 DSH |
2501 | /* get the certificate types */ |
2502 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
f63a17d6 MC |
2503 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2504 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2505 | SSL_R_LENGTH_MISMATCH); | |
2506 | return MSG_PROCESS_ERROR; | |
03f44b97 DSH |
2507 | } |
2508 | ||
555cbb32 | 2509 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
f63a17d6 MC |
2510 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2511 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2512 | ERR_R_INTERNAL_ERROR); | |
2513 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2514 | } |
ac112332 | 2515 | |
32f66107 DSH |
2516 | if (SSL_USE_SIGALGS(s)) { |
2517 | PACKET sigalgs; | |
703bcee0 | 2518 | |
32f66107 | 2519 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
848a950b | 2520 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2521 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2522 | SSL_R_LENGTH_MISMATCH); | |
2523 | return MSG_PROCESS_ERROR; | |
32f66107 | 2524 | } |
ac112332 | 2525 | |
c589c34e BK |
2526 | /* |
2527 | * Despite this being for certificates, preserve compatibility | |
2528 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2529 | */ | |
2530 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 MC |
2531 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2532 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2533 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2534 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2535 | } |
2536 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2537 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2538 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2539 | ERR_R_MALLOC_FAILURE); | |
2540 | return MSG_PROCESS_ERROR; | |
32f66107 | 2541 | } |
0f113f3e | 2542 | } |
0f113f3e | 2543 | |
32f66107 | 2544 | /* get the CA RDNs */ |
f63a17d6 MC |
2545 | if (!parse_ca_names(s, pkt)) { |
2546 | /* SSLfatal() already called */ | |
2547 | return MSG_PROCESS_ERROR; | |
2548 | } | |
03f44b97 DSH |
2549 | } |
2550 | ||
2551 | if (PACKET_remaining(pkt) != 0) { | |
848a950b | 2552 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2553 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2554 | SSL_R_LENGTH_MISMATCH); | |
2555 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2556 | } |
0f113f3e | 2557 | |
0f113f3e | 2558 | /* we should setup a certificate to return.... */ |
555cbb32 | 2559 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2560 | |
e4562014 MC |
2561 | /* |
2562 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2563 | * after the CertificateVerify message has been received. This is because | |
2564 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2565 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2566 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2567 | * client_cert_cb. |
2568 | */ | |
2569 | if (SSL_IS_TLS13(s) && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
2570 | return MSG_PROCESS_CONTINUE_READING; | |
2571 | ||
f63a17d6 | 2572 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2573 | } |
2574 | ||
be3583fa | 2575 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2576 | { |
b9908bf9 | 2577 | unsigned int ticklen; |
9ac6244b | 2578 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2579 | unsigned int sess_len; |
de1df7e9 | 2580 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2581 | PACKET nonce; |
abd86cec | 2582 | EVP_MD *sha256 = NULL; |
b9908bf9 | 2583 | |
6cf2dbd9 MC |
2584 | PACKET_null_init(&nonce); |
2585 | ||
73999b62 | 2586 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2587 | || (SSL_IS_TLS13(s) |
2588 | && (!PACKET_get_net_4(pkt, &age_add) | |
6cf2dbd9 | 2589 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2590 | || !PACKET_get_net_2(pkt, &ticklen) |
10bda8f8 MC |
2591 | || (SSL_IS_TLS13(s) ? (ticklen == 0 || PACKET_remaining(pkt) < ticklen) |
2592 | : PACKET_remaining(pkt) != ticklen)) { | |
f63a17d6 MC |
2593 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2594 | SSL_R_LENGTH_MISMATCH); | |
2595 | goto err; | |
e711da71 EK |
2596 | } |
2597 | ||
de1df7e9 MC |
2598 | /* |
2599 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2600 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2601 | * be 0 here in that instance | |
2602 | */ | |
e711da71 | 2603 | if (ticklen == 0) |
c9de4a20 | 2604 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2605 | |
150840b9 MC |
2606 | /* |
2607 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2608 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2609 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2610 | * time a NewSessionTicket arrives because those messages arrive | |
2611 | * post-handshake and the session may have already gone into the session | |
2612 | * cache. | |
2613 | */ | |
2614 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee | 2615 | SSL_SESSION *new_sess; |
1f156321 | 2616 | |
98ece4ee MC |
2617 | /* |
2618 | * We reused an existing session, so we need to replace it with a new | |
2619 | * one | |
2620 | */ | |
5d61491c | 2621 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
f63a17d6 MC |
2622 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2623 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2624 | ERR_R_MALLOC_FAILURE); | |
2625 | goto err; | |
5d61491c MC |
2626 | } |
2627 | ||
1f156321 MC |
2628 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
2629 | && !SSL_IS_TLS13(s)) { | |
2630 | /* | |
2631 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2632 | * any old ticket we were using is now out of date, so we remove the | |
2633 | * old session from the cache. We carry on if this fails | |
2634 | */ | |
2635 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2636 | } | |
2637 | ||
98ece4ee MC |
2638 | SSL_SESSION_free(s->session); |
2639 | s->session = new_sess; | |
2640 | } | |
2641 | ||
fc24f0bf MC |
2642 | /* |
2643 | * Technically the cast to long here is not guaranteed by the C standard - | |
2644 | * but we use it elsewhere, so this should be ok. | |
2645 | */ | |
2646 | s->session->time = (long)time(NULL); | |
2647 | ||
aff8c126 RS |
2648 | OPENSSL_free(s->session->ext.tick); |
2649 | s->session->ext.tick = NULL; | |
2650 | s->session->ext.ticklen = 0; | |
e711da71 | 2651 | |
aff8c126 RS |
2652 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2653 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
2654 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2655 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2656 | goto err; |
2657 | } | |
aff8c126 | 2658 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
2659 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2660 | SSL_R_LENGTH_MISMATCH); | |
2661 | goto err; | |
561e12bb | 2662 | } |
e711da71 | 2663 | |
aff8c126 | 2664 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2665 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2666 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2667 | |
2668 | if (SSL_IS_TLS13(s)) { | |
2669 | PACKET extpkt; | |
2670 | ||
2671 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 MC |
2672 | || PACKET_remaining(pkt) != 0) { |
2673 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
2674 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2675 | SSL_R_LENGTH_MISMATCH); | |
2676 | goto err; | |
2677 | } | |
2678 | ||
2679 | if (!tls_collect_extensions(s, &extpkt, | |
2680 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2681 | NULL, 1) | |
fe874d27 MC |
2682 | || !tls_parse_all_extensions(s, |
2683 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2684 | exts, NULL, 0, 1)) { |
2685 | /* SSLfatal() already called */ | |
2686 | goto err; | |
de1df7e9 MC |
2687 | } |
2688 | } | |
2689 | ||
0f113f3e MC |
2690 | /* |
2691 | * There are two ways to detect a resumed ticket session. One is to set | |
2692 | * an appropriate session ID and then the server must return a match in | |
2693 | * ServerHello. This allows the normal client session ID matching to work | |
2694 | * and we know much earlier that the ticket has been accepted. The | |
2695 | * other way is to set zero length session ID when the ticket is | |
2696 | * presented and rely on the handshake to determine session resumption. | |
2697 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2698 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2699 | * ticket. | |
0f113f3e | 2700 | */ |
abd86cec MC |
2701 | sha256 = EVP_MD_fetch(s->ctx->libctx, "SHA2-256", s->ctx->propq); |
2702 | if (sha256 == NULL) { | |
2703 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2704 | SSL_R_ALGORITHM_FETCH_FAILED); | |
2705 | goto err; | |
2706 | } | |
ec60ccc1 MC |
2707 | /* |
2708 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2709 | * but s->session->session_id_length is a size_t | |
2710 | */ | |
aff8c126 | 2711 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2712 | s->session->session_id, &sess_len, |
abd86cec | 2713 | sha256, NULL)) { |
f63a17d6 MC |
2714 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2715 | ERR_R_EVP_LIB); | |
d166ed8c DSH |
2716 | goto err; |
2717 | } | |
abd86cec MC |
2718 | EVP_MD_free(sha256); |
2719 | sha256 = NULL; | |
ec60ccc1 | 2720 | s->session->session_id_length = sess_len; |
4cb00457 | 2721 | s->session->not_resumable = 0; |
de1df7e9 MC |
2722 | |
2723 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2724 | if (SSL_IS_TLS13(s)) { | |
4ff1a526 MC |
2725 | const EVP_MD *md = ssl_handshake_md(s); |
2726 | int hashleni = EVP_MD_size(md); | |
2727 | size_t hashlen; | |
2728 | static const unsigned char nonce_label[] = "resumption"; | |
2729 | ||
2730 | /* Ensure cast to size_t is safe */ | |
2731 | if (!ossl_assert(hashleni >= 0)) { | |
2732 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2733 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2734 | ERR_R_INTERNAL_ERROR); | |
2735 | goto err; | |
2736 | } | |
2737 | hashlen = (size_t)hashleni; | |
2738 | ||
2739 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2740 | nonce_label, | |
2741 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2742 | PACKET_data(&nonce), |
2743 | PACKET_remaining(&nonce), | |
4ff1a526 | 2744 | s->session->master_key, |
0fb2815b | 2745 | hashlen, 1)) { |
4ff1a526 MC |
2746 | /* SSLfatal() already called */ |
2747 | goto err; | |
2748 | } | |
2749 | s->session->master_key_length = hashlen; | |
2750 | ||
33d93417 | 2751 | OPENSSL_free(exts); |
de1df7e9 MC |
2752 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2753 | return MSG_PROCESS_FINISHED_READING; | |
2754 | } | |
2755 | ||
b9908bf9 | 2756 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2757 | err: |
abd86cec | 2758 | EVP_MD_free(sha256); |
33d93417 | 2759 | OPENSSL_free(exts); |
b9908bf9 | 2760 | return MSG_PROCESS_ERROR; |
0f113f3e | 2761 | } |
67c8e7f4 | 2762 | |
f63e4288 MC |
2763 | /* |
2764 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2765 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2766 | */ |
f63a17d6 | 2767 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2768 | { |
8b0e934a | 2769 | size_t resplen; |
b9908bf9 | 2770 | unsigned int type; |
b9908bf9 | 2771 | |
73999b62 | 2772 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2773 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
2774 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2775 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
f63e4288 | 2776 | return 0; |
0f113f3e | 2777 | } |
56a26ce3 MC |
2778 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2779 | || PACKET_remaining(pkt) != resplen) { | |
f63a17d6 MC |
2780 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2781 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2782 | return 0; |
0f113f3e | 2783 | } |
8cbfcc70 RS |
2784 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2785 | if (s->ext.ocsp.resp == NULL) { | |
f63a17d6 MC |
2786 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2787 | ERR_R_MALLOC_FAILURE); | |
f63e4288 | 2788 | return 0; |
0f113f3e | 2789 | } |
8cbfcc70 | 2790 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63a17d6 MC |
2791 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2792 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2793 | return 0; |
ac63710a | 2794 | } |
8cbfcc70 | 2795 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2796 | |
2797 | return 1; | |
2798 | } | |
2faa1b48 | 2799 | |
f63e4288 MC |
2800 | |
2801 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2802 | { | |
f63a17d6 MC |
2803 | if (!tls_process_cert_status_body(s, pkt)) { |
2804 | /* SSLfatal() already called */ | |
f63e4288 MC |
2805 | return MSG_PROCESS_ERROR; |
2806 | } | |
2807 | ||
b9908bf9 | 2808 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2809 | } |
d02b48c6 | 2810 | |
7776a36c MC |
2811 | /* |
2812 | * Perform miscellaneous checks and processing after we have received the | |
2813 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2814 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2815 | * on failure. | |
7776a36c | 2816 | */ |
f63a17d6 | 2817 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2818 | { |
a455d0f6 MC |
2819 | /* |
2820 | * at this point we check that we have the required stuff from | |
2821 | * the server | |
2822 | */ | |
2823 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2824 | /* SSLfatal() already called */ |
7776a36c | 2825 | return 0; |
a455d0f6 MC |
2826 | } |
2827 | ||
bb1aaab4 | 2828 | /* |
aff8c126 RS |
2829 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2830 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2831 | * message, or NULL and -1 otherwise |
2832 | */ | |
aff8c126 RS |
2833 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2834 | && s->ctx->ext.status_cb != NULL) { | |
2835 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2836 | ||
bb1aaab4 | 2837 | if (ret == 0) { |
f63a17d6 MC |
2838 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
2839 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2840 | SSL_R_INVALID_STATUS_RESPONSE); | |
7776a36c | 2841 | return 0; |
bb1aaab4 MC |
2842 | } |
2843 | if (ret < 0) { | |
f63a17d6 MC |
2844 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2845 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
dd5a4279 | 2846 | ERR_R_MALLOC_FAILURE); |
7776a36c | 2847 | return 0; |
bb1aaab4 MC |
2848 | } |
2849 | } | |
ed29e82a RP |
2850 | #ifndef OPENSSL_NO_CT |
2851 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2852 | /* Note we validate the SCTs whether or not we abort on error */ |
2853 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2854 | /* SSLfatal() already called */ |
7776a36c | 2855 | return 0; |
ed29e82a RP |
2856 | } |
2857 | } | |
2858 | #endif | |
2859 | ||
7776a36c MC |
2860 | return 1; |
2861 | } | |
2862 | ||
2863 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2864 | { | |
7776a36c MC |
2865 | if (PACKET_remaining(pkt) > 0) { |
2866 | /* should contain no data */ | |
f63a17d6 MC |
2867 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2868 | SSL_R_LENGTH_MISMATCH); | |
2869 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2870 | } |
2871 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2872 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
7776a36c | 2873 | if (SRP_Calc_A_param(s) <= 0) { |
f63a17d6 MC |
2874 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2875 | SSL_R_SRP_A_CALC); | |
2876 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2877 | } |
2878 | } | |
2879 | #endif | |
2880 | ||
f63a17d6 MC |
2881 | if (!tls_process_initial_server_flight(s)) { |
2882 | /* SSLfatal() already called */ | |
2883 | return MSG_PROCESS_ERROR; | |
2884 | } | |
7776a36c | 2885 | |
bd79bcb4 | 2886 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2887 | } |
176f31dd | 2888 | |
a2c2e000 | 2889 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2890 | { |
7689082b | 2891 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2892 | int ret = 0; |
2893 | /* | |
2894 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2895 | * \0-terminated identity. The last byte is for us for simulating | |
2896 | * strnlen. | |
2897 | */ | |
2898 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2899 | size_t identitylen = 0; | |
2900 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2901 | unsigned char *tmppsk = NULL; | |
2902 | char *tmpidentity = NULL; | |
2903 | size_t psklen = 0; | |
2904 | ||
2905 | if (s->psk_client_callback == NULL) { | |
a2c2e000 MC |
2906 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2907 | SSL_R_PSK_NO_CLIENT_CB); | |
13c0ec4a MC |
2908 | goto err; |
2909 | } | |
d02b48c6 | 2910 | |
13c0ec4a | 2911 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2912 | |
13c0ec4a MC |
2913 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2914 | identity, sizeof(identity) - 1, | |
2915 | psk, sizeof(psk)); | |
7689082b | 2916 | |
13c0ec4a | 2917 | if (psklen > PSK_MAX_PSK_LEN) { |
a2c2e000 MC |
2918 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2919 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2920 | goto err; |
2921 | } else if (psklen == 0) { | |
a2c2e000 MC |
2922 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2923 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, | |
2924 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
13c0ec4a MC |
2925 | goto err; |
2926 | } | |
7689082b | 2927 | |
13c0ec4a MC |
2928 | identitylen = strlen(identity); |
2929 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2930 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2931 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2932 | goto err; |
2933 | } | |
7689082b | 2934 | |
13c0ec4a MC |
2935 | tmppsk = OPENSSL_memdup(psk, psklen); |
2936 | tmpidentity = OPENSSL_strdup(identity); | |
2937 | if (tmppsk == NULL || tmpidentity == NULL) { | |
a2c2e000 MC |
2938 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2939 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2940 | goto err; |
2941 | } | |
7689082b | 2942 | |
555cbb32 TS |
2943 | OPENSSL_free(s->s3.tmp.psk); |
2944 | s->s3.tmp.psk = tmppsk; | |
2945 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
2946 | tmppsk = NULL; |
2947 | OPENSSL_free(s->session->psk_identity); | |
2948 | s->session->psk_identity = tmpidentity; | |
2949 | tmpidentity = NULL; | |
f1ec23c0 | 2950 | |
b2b3024e | 2951 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
a2c2e000 MC |
2952 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2953 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2954 | goto err; |
2955 | } | |
7689082b | 2956 | |
13c0ec4a | 2957 | ret = 1; |
0bce0b02 | 2958 | |
13c0ec4a MC |
2959 | err: |
2960 | OPENSSL_cleanse(psk, psklen); | |
2961 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2962 | OPENSSL_clear_free(tmppsk, psklen); | |
2963 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2964 | |
13c0ec4a MC |
2965 | return ret; |
2966 | #else | |
a2c2e000 MC |
2967 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2968 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2969 | return 0; |
b9908bf9 | 2970 | #endif |
13c0ec4a | 2971 | } |
b9908bf9 | 2972 | |
a2c2e000 | 2973 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2974 | { |
bc36ee62 | 2975 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2976 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2977 | EVP_PKEY *pkey = NULL; |
2978 | EVP_PKEY_CTX *pctx = NULL; | |
2979 | size_t enclen; | |
2980 | unsigned char *pms = NULL; | |
2981 | size_t pmslen = 0; | |
b9908bf9 | 2982 | |
13c0ec4a MC |
2983 | if (s->session->peer == NULL) { |
2984 | /* | |
2985 | * We should always have a server certificate with SSL_kRSA. | |
2986 | */ | |
a2c2e000 MC |
2987 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2988 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2989 | return 0; |
2990 | } | |
0f113f3e | 2991 | |
13c0ec4a MC |
2992 | pkey = X509_get0_pubkey(s->session->peer); |
2993 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
a2c2e000 MC |
2994 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2995 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2996 | return 0; |
2997 | } | |
0f113f3e | 2998 | |
13c0ec4a MC |
2999 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
3000 | pms = OPENSSL_malloc(pmslen); | |
3001 | if (pms == NULL) { | |
a2c2e000 MC |
3002 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3003 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
3004 | return 0; |
3005 | } | |
0bce0b02 | 3006 | |
13c0ec4a MC |
3007 | pms[0] = s->client_version >> 8; |
3008 | pms[1] = s->client_version & 0xff; | |
348240c6 | 3009 | /* TODO(size_t): Convert this function */ |
8f21260b | 3010 | if (RAND_bytes_ex(s->ctx->libctx, pms + 2, (int)(pmslen - 2)) <= 0) { |
a2c2e000 MC |
3011 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3012 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
3013 | goto err; |
3014 | } | |
0f113f3e | 3015 | |
13c0ec4a | 3016 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3017 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
a2c2e000 MC |
3018 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3019 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
3020 | goto err; |
3021 | } | |
3aceb9ec MC |
3022 | |
3023 | pctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, pkey, s->ctx->propq); | |
13c0ec4a MC |
3024 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
3025 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3026 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3027 | ERR_R_EVP_LIB); | |
13c0ec4a MC |
3028 | goto err; |
3029 | } | |
f1ec23c0 MC |
3030 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
3031 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3032 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3033 | SSL_R_BAD_RSA_ENCRYPT); | |
13c0ec4a MC |
3034 | goto err; |
3035 | } | |
13c0ec4a MC |
3036 | EVP_PKEY_CTX_free(pctx); |
3037 | pctx = NULL; | |
0f113f3e | 3038 | |
13c0ec4a | 3039 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3040 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
a2c2e000 MC |
3041 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3042 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3043 | goto err; |
b9908bf9 | 3044 | } |
13c0ec4a | 3045 | |
2faa1b48 | 3046 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
3047 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
3048 | /* SSLfatal() already called */ | |
2faa1b48 | 3049 | goto err; |
a2c2e000 | 3050 | } |
2faa1b48 | 3051 | |
555cbb32 TS |
3052 | s->s3.tmp.pms = pms; |
3053 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 3054 | |
13c0ec4a MC |
3055 | return 1; |
3056 | err: | |
3057 | OPENSSL_clear_free(pms, pmslen); | |
3058 | EVP_PKEY_CTX_free(pctx); | |
3059 | ||
3060 | return 0; | |
3061 | #else | |
a2c2e000 MC |
3062 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
3063 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 3064 | return 0; |
f9b3bff6 | 3065 | #endif |
13c0ec4a MC |
3066 | } |
3067 | ||
a2c2e000 | 3068 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 MC |
3069 | { |
3070 | #ifndef OPENSSL_NO_DH | |
3071 | DH *dh_clnt = NULL; | |
3072 | const BIGNUM *pub_key; | |
3073 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 3074 | unsigned char *keybytes = NULL; |
a8c1c704 | 3075 | |
555cbb32 | 3076 | skey = s->s3.peer_tmp; |
a2c2e000 MC |
3077 | if (skey == NULL) { |
3078 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3079 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3080 | goto err; |
a2c2e000 | 3081 | } |
f1ec23c0 | 3082 | |
0f00ed77 | 3083 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 MC |
3084 | if (ckey == NULL) { |
3085 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3086 | ERR_R_INTERNAL_ERROR); | |
b599ce3b | 3087 | goto err; |
a2c2e000 | 3088 | } |
b599ce3b | 3089 | |
a8c1c704 MC |
3090 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
3091 | ||
a2c2e000 MC |
3092 | if (dh_clnt == NULL) { |
3093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3094 | ERR_R_INTERNAL_ERROR); | |
3095 | goto err; | |
3096 | } | |
3097 | ||
3098 | if (ssl_derive(s, ckey, skey, 0) == 0) { | |
3099 | /* SSLfatal() already called */ | |
f1ec23c0 | 3100 | goto err; |
a2c2e000 | 3101 | } |
a8c1c704 MC |
3102 | |
3103 | /* send off the data */ | |
3104 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
a2c2e000 MC |
3105 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), |
3106 | &keybytes)) { | |
3107 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3108 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3109 | goto err; |
a2c2e000 | 3110 | } |
f1ec23c0 MC |
3111 | |
3112 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
3113 | EVP_PKEY_free(ckey); |
3114 | ||
3115 | return 1; | |
f1ec23c0 MC |
3116 | err: |
3117 | EVP_PKEY_free(ckey); | |
f9f674eb MC |
3118 | return 0; |
3119 | #else | |
a2c2e000 MC |
3120 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, |
3121 | ERR_R_INTERNAL_ERROR); | |
a8c1c704 | 3122 | return 0; |
f9f674eb | 3123 | #endif |
a8c1c704 MC |
3124 | } |
3125 | ||
a2c2e000 | 3126 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab MC |
3127 | { |
3128 | #ifndef OPENSSL_NO_EC | |
3129 | unsigned char *encodedPoint = NULL; | |
348240c6 | 3130 | size_t encoded_pt_len = 0; |
67ad5aab | 3131 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3132 | int ret = 0; |
67ad5aab | 3133 | |
555cbb32 | 3134 | skey = s->s3.peer_tmp; |
ec24630a | 3135 | if (skey == NULL) { |
a2c2e000 MC |
3136 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3137 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3138 | return 0; |
3139 | } | |
3140 | ||
0f00ed77 | 3141 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 3142 | if (ckey == NULL) { |
a2c2e000 MC |
3143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3144 | ERR_R_MALLOC_FAILURE); | |
b599ce3b MC |
3145 | goto err; |
3146 | } | |
67ad5aab | 3147 | |
0f1e51ea | 3148 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3149 | /* SSLfatal() already called */ |
67ad5aab MC |
3150 | goto err; |
3151 | } | |
3152 | ||
3153 | /* Generate encoding of client key */ | |
ec24630a | 3154 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
3155 | |
3156 | if (encoded_pt_len == 0) { | |
a2c2e000 MC |
3157 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3158 | ERR_R_EC_LIB); | |
67ad5aab MC |
3159 | goto err; |
3160 | } | |
3161 | ||
b2b3024e | 3162 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
a2c2e000 MC |
3163 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3164 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
3165 | goto err; |
3166 | } | |
67ad5aab | 3167 | |
f1ec23c0 | 3168 | ret = 1; |
67ad5aab | 3169 | err: |
f1ec23c0 | 3170 | OPENSSL_free(encodedPoint); |
67ad5aab | 3171 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3172 | return ret; |
67ad5aab | 3173 | #else |
a2c2e000 MC |
3174 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3175 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3176 | return 0; |
3177 | #endif | |
3178 | } | |
3179 | ||
a2c2e000 | 3180 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3181 | { |
3182 | #ifndef OPENSSL_NO_GOST | |
3183 | /* GOST key exchange message creation */ | |
3184 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3185 | X509 *peer_cert; | |
3186 | size_t msglen; | |
3187 | unsigned int md_len; | |
3188 | unsigned char shared_ukm[32], tmp[256]; | |
3189 | EVP_MD_CTX *ukm_hash = NULL; | |
3190 | int dgst_nid = NID_id_GostR3411_94; | |
3191 | unsigned char *pms = NULL; | |
3192 | size_t pmslen = 0; | |
3193 | ||
555cbb32 | 3194 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3195 | dgst_nid = NID_id_GostR3411_2012_256; |
3196 | ||
3197 | /* | |
1ee4b98e | 3198 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3199 | */ |
3200 | peer_cert = s->session->peer; | |
12a765a5 | 3201 | if (peer_cert == NULL) { |
a2c2e000 | 3202 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
3203 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
3204 | return 0; | |
3205 | } | |
3206 | ||
0f00ed77 MC |
3207 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, |
3208 | X509_get0_pubkey(peer_cert), | |
3209 | s->ctx->propq); | |
e00e0b3d | 3210 | if (pkey_ctx == NULL) { |
a2c2e000 MC |
3211 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3212 | ERR_R_MALLOC_FAILURE); | |
e00e0b3d MC |
3213 | return 0; |
3214 | } | |
3215 | /* | |
3216 | * If we have send a certificate, and certificate key | |
3217 | * parameters match those of server certificate, use | |
3218 | * certificate key for key exchange | |
3219 | */ | |
3220 | ||
3221 | /* Otherwise, generate ephemeral key pair */ | |
3222 | pmslen = 32; | |
3223 | pms = OPENSSL_malloc(pmslen); | |
3224 | if (pms == NULL) { | |
a2c2e000 MC |
3225 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3226 | ERR_R_MALLOC_FAILURE); | |
2f3930bc | 3227 | goto err; |
e00e0b3d MC |
3228 | } |
3229 | ||
3230 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3231 | /* Generate session key |
3232 | * TODO(size_t): Convert this function | |
3233 | */ | |
8f21260b | 3234 | || RAND_bytes_ex(s->ctx->libctx, pms, (int)pmslen) <= 0) { |
a2c2e000 MC |
3235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3236 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3237 | goto err; |
3238 | }; | |
e00e0b3d MC |
3239 | /* |
3240 | * Compute shared IV and store it in algorithm-specific context | |
3241 | * data | |
3242 | */ | |
3243 | ukm_hash = EVP_MD_CTX_new(); | |
3244 | if (ukm_hash == NULL | |
a230b26e | 3245 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3246 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3247 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3248 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3249 | SSL3_RANDOM_SIZE) <= 0 |
3250 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
a2c2e000 MC |
3251 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3252 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3253 | goto err; |
3254 | } | |
3255 | EVP_MD_CTX_free(ukm_hash); | |
3256 | ukm_hash = NULL; | |
3257 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3258 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
a2c2e000 MC |
3259 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3260 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3261 | goto err; |
3262 | } | |
3263 | /* Make GOST keytransport blob message */ | |
3264 | /* | |
3265 | * Encapsulate it into sequence | |
3266 | */ | |
e00e0b3d MC |
3267 | msglen = 255; |
3268 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3269 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3270 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3271 | goto err; |
3272 | } | |
f1ec23c0 | 3273 | |
08029dfa MC |
3274 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3275 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3276 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
a2c2e000 MC |
3277 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3278 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3279 | goto err; |
e00e0b3d | 3280 | } |
f1ec23c0 | 3281 | |
e00e0b3d | 3282 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3283 | s->s3.tmp.pms = pms; |
3284 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3285 | |
3286 | return 1; | |
3287 | err: | |
3288 | EVP_PKEY_CTX_free(pkey_ctx); | |
3289 | OPENSSL_clear_free(pms, pmslen); | |
3290 | EVP_MD_CTX_free(ukm_hash); | |
3291 | return 0; | |
3292 | #else | |
a2c2e000 MC |
3293 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3294 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3295 | return 0; |
3296 | #endif | |
3297 | } | |
3298 | ||
5a5530a2 DB |
3299 | #ifndef OPENSSL_NO_GOST |
3300 | int gost18_cke_cipher_nid(const SSL *s) | |
3301 | { | |
3302 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3303 | return NID_magma_ctr; | |
3304 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3305 | return NID_kuznyechik_ctr; | |
3306 | ||
3307 | return NID_undef; | |
3308 | } | |
3309 | ||
3310 | int gost_ukm(const SSL *s, unsigned char *dgst_buf) | |
3311 | { | |
3312 | EVP_MD_CTX * hash = NULL; | |
3313 | unsigned int md_len; | |
3314 | const EVP_MD *md = ssl_evp_md_fetch(s->ctx->libctx, NID_id_GostR3411_2012_256, s->ctx->propq); | |
3315 | ||
3316 | if (md == NULL) | |
3317 | return 0; | |
3318 | ||
3319 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3320 | || EVP_DigestInit(hash, md) <= 0 | |
3321 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3322 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3323 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3324 | EVP_MD_CTX_free(hash); | |
3325 | ssl_evp_md_free(md); | |
3326 | return 0; | |
3327 | } | |
3328 | ||
3329 | EVP_MD_CTX_free(hash); | |
3330 | ssl_evp_md_free(md); | |
3331 | return 1; | |
3332 | } | |
3333 | #endif | |
3334 | ||
3335 | static int tls_construct_cke_gost18(SSL *s, WPACKET *pkt) | |
3336 | { | |
3337 | #ifndef OPENSSL_NO_GOST | |
3338 | /* GOST 2018 key exchange message creation */ | |
3339 | unsigned char rnd_dgst[32], tmp[255]; | |
3340 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3341 | X509 *peer_cert; | |
3342 | unsigned char *pms = NULL; | |
3343 | size_t pmslen = 0; | |
3344 | size_t msglen; | |
3345 | int cipher_nid = gost18_cke_cipher_nid(s); | |
3346 | ||
3347 | if (cipher_nid == NID_undef) { | |
3348 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3349 | ERR_R_INTERNAL_ERROR); | |
3350 | return 0; | |
3351 | } | |
3352 | ||
3353 | if (gost_ukm(s, rnd_dgst) <= 0) { | |
3354 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3355 | ERR_R_INTERNAL_ERROR); | |
3356 | goto err; | |
3357 | } | |
3358 | ||
3359 | /* Pre-master secret - random bytes */ | |
3360 | pmslen = 32; | |
3361 | pms = OPENSSL_malloc(pmslen); | |
3362 | if (pms == NULL) { | |
3363 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3364 | ERR_R_MALLOC_FAILURE); | |
3365 | goto err; | |
3366 | } | |
3367 | ||
3368 | if (RAND_bytes_ex(s->ctx->libctx, pms, (int)pmslen) <= 0) { | |
3369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3370 | ERR_R_INTERNAL_ERROR); | |
3371 | goto err; | |
3372 | } | |
3373 | ||
3374 | /* Get server certificate PKEY and create ctx from it */ | |
3375 | peer_cert = s->session->peer; | |
3376 | if (peer_cert == NULL) { | |
3377 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3378 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
3379 | return 0; | |
3380 | } | |
3381 | ||
3382 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, X509_get0_pubkey(peer_cert), s->ctx->propq); | |
3383 | if (pkey_ctx == NULL) { | |
3384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3385 | ERR_R_MALLOC_FAILURE); | |
3386 | return 0; | |
3387 | } | |
3388 | ||
3389 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 ) { | |
3390 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3391 | ERR_R_INTERNAL_ERROR); | |
3392 | goto err; | |
3393 | }; | |
3394 | ||
3395 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3396 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3397 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) < 0) { | |
3398 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3399 | SSL_R_LIBRARY_BUG); | |
3400 | goto err; | |
3401 | } | |
3402 | ||
3403 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3404 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) < 0) { | |
3405 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3406 | SSL_R_LIBRARY_BUG); | |
3407 | goto err; | |
3408 | } | |
3409 | ||
3410 | msglen = 255; | |
3411 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
3412 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3413 | SSL_R_LIBRARY_BUG); | |
3414 | goto err; | |
3415 | } | |
3416 | ||
3417 | if (!WPACKET_memcpy(pkt, tmp, msglen)) { | |
3418 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3419 | ERR_R_INTERNAL_ERROR); | |
3420 | goto err; | |
3421 | } | |
3422 | ||
3423 | EVP_PKEY_CTX_free(pkey_ctx); | |
3424 | s->s3.tmp.pms = pms; | |
3425 | s->s3.tmp.pmslen = pmslen; | |
3426 | ||
3427 | return 1; | |
3428 | err: | |
3429 | EVP_PKEY_CTX_free(pkey_ctx); | |
3430 | OPENSSL_clear_free(pms, pmslen); | |
3431 | return 0; | |
3432 | #else | |
3433 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST18, | |
3434 | ERR_R_INTERNAL_ERROR); | |
3435 | return 0; | |
3436 | #endif | |
3437 | } | |
3438 | ||
a2c2e000 | 3439 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3440 | { |
8b9546c7 | 3441 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3442 | unsigned char *abytes = NULL; |
3443 | ||
3444 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3445 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3446 | &abytes)) { | |
a2c2e000 MC |
3447 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3448 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3449 | return 0; |
3450 | } | |
f1ec23c0 MC |
3451 | BN_bn2bin(s->srp_ctx.A, abytes); |
3452 | ||
840a2bf8 MC |
3453 | OPENSSL_free(s->session->srp_username); |
3454 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3455 | if (s->session->srp_username == NULL) { | |
a2c2e000 MC |
3456 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3457 | ERR_R_MALLOC_FAILURE); | |
840a2bf8 MC |
3458 | return 0; |
3459 | } | |
3460 | ||
3461 | return 1; | |
3462 | #else | |
a2c2e000 MC |
3463 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3464 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3465 | return 0; |
3466 | #endif | |
3467 | } | |
3468 | ||
7cea05dc | 3469 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3470 | { |
13c0ec4a | 3471 | unsigned long alg_k; |
13c0ec4a | 3472 | |
555cbb32 | 3473 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3474 | |
a2c2e000 MC |
3475 | /* |
3476 | * All of the construct functions below call SSLfatal() if necessary so | |
3477 | * no need to do so here. | |
3478 | */ | |
13c0ec4a | 3479 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3480 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3481 | goto err; |
3482 | ||
f1ec23c0 | 3483 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3484 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3485 | goto err; |
a8c1c704 | 3486 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3487 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3488 | goto err; |
67ad5aab | 3489 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3490 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3491 | goto err; |
e00e0b3d | 3492 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3493 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3494 | goto err; |
5a5530a2 DB |
3495 | } else if (alg_k & SSL_kGOST18) { |
3496 | if (!tls_construct_cke_gost18(s, pkt)) | |
3497 | goto err; | |
840a2bf8 | 3498 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3499 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3500 | goto err; |
4a424545 | 3501 | } else if (!(alg_k & SSL_kPSK)) { |
a2c2e000 MC |
3502 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3503 | SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3504 | goto err; |
3505 | } | |
3506 | ||
b9908bf9 | 3507 | return 1; |
0f113f3e | 3508 | err: |
555cbb32 TS |
3509 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3510 | s->s3.tmp.pms = NULL; | |
7689082b | 3511 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3512 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3513 | s->s3.tmp.psk = NULL; | |
0f113f3e | 3514 | #endif |
b9908bf9 MC |
3515 | return 0; |
3516 | } | |
3517 | ||
3518 | int tls_client_key_exchange_post_work(SSL *s) | |
3519 | { | |
3520 | unsigned char *pms = NULL; | |
3521 | size_t pmslen = 0; | |
3522 | ||
555cbb32 TS |
3523 | pms = s->s3.tmp.pms; |
3524 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3525 | |
b9908bf9 MC |
3526 | #ifndef OPENSSL_NO_SRP |
3527 | /* Check for SRP */ | |
555cbb32 | 3528 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3529 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3530 | /* SSLfatal() already called */ |
b9908bf9 MC |
3531 | goto err; |
3532 | } | |
3533 | return 1; | |
3534 | } | |
3535 | #endif | |
b9908bf9 | 3536 | |
555cbb32 | 3537 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
a2c2e000 MC |
3538 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3539 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
b9908bf9 MC |
3540 | goto err; |
3541 | } | |
3542 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3543 | /* SSLfatal() already called */ |
6f137370 MC |
3544 | /* ssl_generate_master_secret frees the pms even on error */ |
3545 | pms = NULL; | |
3546 | pmslen = 0; | |
b9908bf9 MC |
3547 | goto err; |
3548 | } | |
6f137370 MC |
3549 | pms = NULL; |
3550 | pmslen = 0; | |
473483d4 MC |
3551 | |
3552 | #ifndef OPENSSL_NO_SCTP | |
3553 | if (SSL_IS_DTLS(s)) { | |
3554 | unsigned char sctpauthkey[64]; | |
3555 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3556 | size_t labellen; |
473483d4 MC |
3557 | |
3558 | /* | |
3559 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3560 | * used. | |
3561 | */ | |
141eb8c6 MC |
3562 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3563 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3564 | |
09d62b33 MT |
3565 | /* Don't include the terminating zero. */ |
3566 | labellen = sizeof(labelbuffer) - 1; | |
3567 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3568 | labellen += 1; | |
3569 | ||
473483d4 | 3570 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e | 3571 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3572 | labellen, NULL, 0, 0) <= 0) { |
a2c2e000 | 3573 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
dd5a4279 MC |
3574 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, |
3575 | ERR_R_INTERNAL_ERROR); | |
473483d4 | 3576 | goto err; |
a2c2e000 | 3577 | } |
473483d4 MC |
3578 | |
3579 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3580 | sizeof(sctpauthkey), sctpauthkey); | |
3581 | } | |
3582 | #endif | |
3583 | ||
b9908bf9 MC |
3584 | return 1; |
3585 | err: | |
3586 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3587 | s->s3.tmp.pms = NULL; |
b9908bf9 | 3588 | return 0; |
0f113f3e | 3589 | } |
d02b48c6 | 3590 | |
0f113f3e MC |
3591 | /* |
3592 | * Check a certificate can be used for client authentication. Currently check | |
3593 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3594 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3595 | */ |
3596 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3597 | { |
0f113f3e | 3598 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3599 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3600 | return 0; |
3601 | /* | |
3602 | * If strict mode check suitability of chain before using it. This also | |
3603 | * adjusts suite B digest if necessary. | |
3604 | */ | |
3605 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3606 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3607 | return 0; | |
0f113f3e MC |
3608 | return 1; |
3609 | } | |
0d609395 | 3610 | |
be3583fa | 3611 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3612 | { |
3613 | X509 *x509 = NULL; | |
3614 | EVP_PKEY *pkey = NULL; | |
3615 | int i; | |
3616 | ||
b9908bf9 | 3617 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3618 | /* Let cert callback update client certificates if required */ |
3619 | if (s->cert->cert_cb) { | |
3620 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3621 | if (i < 0) { | |
3622 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3623 | return WORK_MORE_A; |
0f113f3e MC |
3624 | } |
3625 | if (i == 0) { | |
f63a17d6 MC |
3626 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3627 | SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, | |
3628 | SSL_R_CALLBACK_FAILED); | |
eb5fd03b | 3629 | return WORK_ERROR; |
0f113f3e MC |
3630 | } |
3631 | s->rwstate = SSL_NOTHING; | |
3632 | } | |
9d75dce3 TS |
3633 | if (ssl3_check_client_certificate(s)) { |
3634 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3635 | return WORK_FINISHED_STOP; | |
3636 | } | |
b9908bf9 | 3637 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3638 | } |
b9908bf9 MC |
3639 | |
3640 | /* Fall through to WORK_MORE_B */ | |
3641 | wst = WORK_MORE_B; | |
0f113f3e MC |
3642 | } |
3643 | ||
3644 | /* We need to get a client cert */ | |
b9908bf9 | 3645 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3646 | /* |
3647 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3648 | * return(-1); We then get retied later | |
3649 | */ | |
0f113f3e MC |
3650 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3651 | if (i < 0) { | |
3652 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3653 | return WORK_MORE_B; |
0f113f3e MC |
3654 | } |
3655 | s->rwstate = SSL_NOTHING; | |
3656 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3657 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3658 | i = 0; | |
3659 | } else if (i == 1) { | |
3660 | i = 0; | |
b9908bf9 | 3661 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3662 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3663 | } | |
3664 | ||
222561fe | 3665 | X509_free(x509); |
25aaa98a | 3666 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3667 | if (i && !ssl3_check_client_certificate(s)) |
3668 | i = 0; | |
3669 | if (i == 0) { | |
3670 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3671 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3672 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3673 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3674 | } else { |
555cbb32 | 3675 | s->s3.tmp.cert_req = 2; |
124037fd | 3676 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3677 | /* SSLfatal() already called */ |
eb5fd03b | 3678 | return WORK_ERROR; |
dab18ab5 | 3679 | } |
0f113f3e MC |
3680 | } |
3681 | } | |
3682 | ||
9d75dce3 TS |
3683 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3684 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3685 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3686 | } |
3687 | ||
b9908bf9 | 3688 | /* Shouldn't ever get here */ |
a2c2e000 MC |
3689 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
3690 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3691 | return WORK_ERROR; |
3692 | } | |
3693 | ||
7cea05dc | 3694 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3695 | { |
9d75dce3 TS |
3696 | if (SSL_IS_TLS13(s)) { |
3697 | if (s->pha_context == NULL) { | |
3698 | /* no context available, add 0-length context */ | |
3699 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
3700 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3701 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3702 | return 0; | |
3703 | } | |
3704 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
3705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3706 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3707 | return 0; | |
3708 | } | |
f63a17d6 MC |
3709 | } |
3710 | if (!ssl3_output_cert_chain(s, pkt, | |
555cbb32 | 3711 | (s->s3.tmp.cert_req == 2) ? NULL |
f63a17d6 MC |
3712 | : s->cert->key)) { |
3713 | /* SSLfatal() already called */ | |
3714 | return 0; | |
f7e393be MC |
3715 | } |
3716 | ||
3717 | if (SSL_IS_TLS13(s) | |
3718 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3719 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3720 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3721 | /* |
a2c2e000 | 3722 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3723 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3724 | */ |
f63a17d6 | 3725 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, |
dd5a4279 | 3726 | SSL_R_CANNOT_CHANGE_CIPHER); |
c31ad0bb | 3727 | return 0; |
0f113f3e | 3728 | } |
b9908bf9 MC |
3729 | |
3730 | return 1; | |
0f113f3e MC |
3731 | } |
3732 | ||
36d16f8e | 3733 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3734 | { |
dd24857b DSH |
3735 | const SSL_CERT_LOOKUP *clu; |
3736 | size_t idx; | |
0f113f3e | 3737 | long alg_k, alg_a; |
d02b48c6 | 3738 | |
555cbb32 TS |
3739 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3740 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3741 | |
0f113f3e | 3742 | /* we don't have a certificate */ |
dd24857b DSH |
3743 | if (!(alg_a & SSL_aCERT)) |
3744 | return 1; | |
d02b48c6 | 3745 | |
0f113f3e | 3746 | /* This is the passed certificate */ |
dd24857b | 3747 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3748 | |
dd24857b DSH |
3749 | /* Check certificate is recognised and suitable for cipher */ |
3750 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
f63a17d6 MC |
3751 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3752 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3753 | SSL_R_MISSING_SIGNING_CERT); | |
3754 | return 0; | |
0f113f3e | 3755 | } |
0f113f3e | 3756 | |
dd24857b DSH |
3757 | #ifndef OPENSSL_NO_EC |
3758 | if (clu->amask & SSL_aECDSA) { | |
3759 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3760 | return 1; | |
f63a17d6 MC |
3761 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3762 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3763 | return 0; | |
0f113f3e | 3764 | } |
d02b48c6 | 3765 | #endif |
bc36ee62 | 3766 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3767 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 MC |
3768 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3769 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3770 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3771 | return 0; | |
0f113f3e | 3772 | } |
79df9d62 | 3773 | #endif |
bc36ee62 | 3774 | #ifndef OPENSSL_NO_DH |
555cbb32 | 3775 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
f63a17d6 MC |
3776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3777 | ERR_R_INTERNAL_ERROR); | |
3778 | return 0; | |
0f113f3e | 3779 | } |
d02b48c6 RE |
3780 | #endif |
3781 | ||
dd24857b | 3782 | return 1; |
0f113f3e MC |
3783 | } |
3784 | ||
e481f9b9 | 3785 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3786 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3787 | { |
15e6be6c MC |
3788 | size_t len, padding_len; |
3789 | unsigned char *padding = NULL; | |
15e6be6c | 3790 | |
aff8c126 | 3791 | len = s->ext.npn_len; |
b9908bf9 | 3792 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3793 | |
aff8c126 | 3794 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3795 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
a2c2e000 MC |
3796 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_NEXT_PROTO, |
3797 | ERR_R_INTERNAL_ERROR); | |
3798 | return 0; | |
15e6be6c MC |
3799 | } |
3800 | ||
3801 | memset(padding, 0, padding_len); | |
3802 | ||
b9908bf9 MC |
3803 | return 1; |
3804 | } | |
6434abbf | 3805 | #endif |
368888bc | 3806 | |
c7f47786 MC |
3807 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3808 | { | |
3809 | if (PACKET_remaining(pkt) > 0) { | |
3810 | /* should contain no data */ | |
f63a17d6 MC |
3811 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_REQ, |
3812 | SSL_R_LENGTH_MISMATCH); | |
c7f47786 MC |
3813 | return MSG_PROCESS_ERROR; |
3814 | } | |
3815 | ||
db0f35dd TS |
3816 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3817 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3818 | return MSG_PROCESS_FINISHED_READING; | |
3819 | } | |
3820 | ||
c7f47786 | 3821 | /* |
1f04f23e MC |
3822 | * This is a historical discrepancy (not in the RFC) maintained for |
3823 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3824 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3825 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3826 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3827 | */ |
3828 | if (SSL_IS_DTLS(s)) | |
3829 | SSL_renegotiate(s); | |
3830 | else | |
3831 | SSL_renegotiate_abbreviated(s); | |
3832 | ||
3833 | return MSG_PROCESS_FINISHED_READING; | |
3834 | } | |
3835 | ||
e46f2334 MC |
3836 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3837 | { | |
e46f2334 | 3838 | PACKET extensions; |
3434f40b | 3839 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3840 | |
26b9172a MC |
3841 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3842 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3843 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, |
3844 | SSL_R_LENGTH_MISMATCH); | |
e46f2334 MC |
3845 | goto err; |
3846 | } | |
3847 | ||
fe874d27 MC |
3848 | if (!tls_collect_extensions(s, &extensions, |
3849 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3850 | NULL, 1) |
fe874d27 | 3851 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3852 | rawexts, NULL, 0, 1)) { |
3853 | /* SSLfatal() already called */ | |
3434f40b | 3854 | goto err; |
f63a17d6 | 3855 | } |
3434f40b | 3856 | |
1b0286a3 | 3857 | OPENSSL_free(rawexts); |
e46f2334 MC |
3858 | return MSG_PROCESS_CONTINUE_READING; |
3859 | ||
3860 | err: | |
1b0286a3 | 3861 | OPENSSL_free(rawexts); |
e46f2334 MC |
3862 | return MSG_PROCESS_ERROR; |
3863 | } | |
3864 | ||
368888bc | 3865 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3866 | { |
3867 | int i = 0; | |
368888bc | 3868 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3869 | if (s->ctx->client_cert_engine) { |
3870 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3871 | SSL_get_client_CA_list(s), | |
3872 | px509, ppkey, NULL, NULL, NULL); | |
3873 | if (i != 0) | |
3874 | return i; | |
3875 | } | |
3876 | #endif | |
3877 | if (s->ctx->client_cert_cb) | |
3878 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3879 | return i; | |
3880 | } | |
d45ba43d | 3881 | |
ae2f7b37 | 3882 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3883 | { |
2c7b4dbc | 3884 | int i; |
aafec89c | 3885 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3886 | int empty_reneg_info_scsv = !s->renegotiate; |
1d0c08b4 | 3887 | |
d45ba43d | 3888 | /* Set disabled masks for this session */ |
1d0c08b4 MC |
3889 | if (!ssl_set_client_disabled(s)) { |
3890 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3891 | SSL_R_NO_PROTOCOLS_AVAILABLE); | |
3892 | return 0; | |
3893 | } | |
d45ba43d | 3894 | |
f63a17d6 MC |
3895 | if (sk == NULL) { |
3896 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3897 | ERR_R_INTERNAL_ERROR); | |
26a7d938 | 3898 | return 0; |
f63a17d6 | 3899 | } |
d45ba43d | 3900 | |
2c7b4dbc MC |
3901 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3902 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3903 | # error Max cipher length too short | |
3904 | # endif | |
3905 | /* | |
3906 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3907 | * chop number of supported ciphers to keep it well below this if we | |
3908 | * use TLS v1.2 | |
3909 | */ | |
3910 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3911 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3912 | else | |
3913 | #endif | |
3914 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3915 | maxlen = 0xfffe; | |
3916 | ||
3917 | if (empty_reneg_info_scsv) | |
3918 | maxlen -= 2; | |
3919 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3920 | maxlen -= 2; | |
3921 | ||
3922 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3923 | const SSL_CIPHER *c; | |
3924 | ||
d45ba43d MC |
3925 | c = sk_SSL_CIPHER_value(sk, i); |
3926 | /* Skip disabled ciphers */ | |
8af91fd9 | 3927 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3928 | continue; |
2c7b4dbc MC |
3929 | |
3930 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
f63a17d6 MC |
3931 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3932 | ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3933 | return 0; |
3934 | } | |
3935 | ||
aafec89c MC |
3936 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3937 | if (!maxverok) { | |
3938 | if (SSL_IS_DTLS(s)) { | |
555cbb32 TS |
3939 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
3940 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
3941 | maxverok = 1; |
3942 | } else { | |
555cbb32 TS |
3943 | if (c->max_tls >= s->s3.tmp.max_ver |
3944 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
3945 | maxverok = 1; |
3946 | } | |
3947 | } | |
3948 | ||
2c7b4dbc | 3949 | totlen += len; |
d45ba43d | 3950 | } |
2c7b4dbc | 3951 | |
aafec89c | 3952 | if (totlen == 0 || !maxverok) { |
f63a17d6 MC |
3953 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3954 | SSL_R_NO_CIPHERS_AVAILABLE); | |
aafec89c MC |
3955 | |
3956 | if (!maxverok) | |
3957 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3958 | "SSL/TLS version"); | |
3959 | ||
2c7b4dbc MC |
3960 | return 0; |
3961 | } | |
3962 | ||
3963 | if (totlen != 0) { | |
d45ba43d MC |
3964 | if (empty_reneg_info_scsv) { |
3965 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3966 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3967 | }; |
2c7b4dbc | 3968 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3969 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3970 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3971 | return 0; |
3972 | } | |
d45ba43d MC |
3973 | } |
3974 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3975 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3976 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3977 | }; |
2c7b4dbc | 3978 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3979 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3980 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3981 | return 0; |
3982 | } | |
d45ba43d MC |
3983 | } |
3984 | } | |
3985 | ||
2c7b4dbc | 3986 | return 1; |
d45ba43d | 3987 | } |
ef6c191b MC |
3988 | |
3989 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3990 | { | |
3991 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3992 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
635c8f77 MC |
3993 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3994 | SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3995 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
ef6c191b MC |
3996 | return 0; |
3997 | } | |
3998 | ||
3999 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
4000 | return 1; | |
4001 | } |