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846e33c7 | 1 | /* |
4333b89f | 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
2c18d164 | 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
7 | * this file except in compliance with the License. You can obtain a copy |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
dee0cc10 | 14 | #include <assert.h> |
706457b7 DMSP |
15 | #include "../ssl_local.h" |
16 | #include "statem_local.h" | |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
dbad1690 | 21 | #include <openssl/md5.h> |
3c27208f | 22 | #include <openssl/dh.h> |
d7e498ac | 23 | #include <openssl/rsa.h> |
d095b68d | 24 | #include <openssl/bn.h> |
3c27208f | 25 | #include <openssl/engine.h> |
49b26f54 | 26 | #include <openssl/trace.h> |
1ee22dc2 MC |
27 | #include <openssl/core_names.h> |
28 | #include <openssl/param_build.h> | |
4ff1a526 | 29 | #include <internal/cryptlib.h> |
f9b3bff6 | 30 | |
597c51bc | 31 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
32 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
33 | ||
7ab09630 | 34 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 35 | static int key_exchange_expected(SSL *s); |
d45ba43d | 36 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 37 | WPACKET *pkt); |
ea262260 | 38 | |
61ae935a MC |
39 | /* |
40 | * Is a CertificateRequest message allowed at the moment or not? | |
41 | * | |
42 | * Return values are: | |
43 | * 1: Yes | |
44 | * 0: No | |
45 | */ | |
7ab09630 | 46 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
47 | { |
48 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 49 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
50 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
51 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
52 | return 0; |
53 | ||
54 | return 1; | |
55 | } | |
56 | ||
57 | /* | |
a455d0f6 | 58 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
59 | * |
60 | * Return values are: | |
61 | * 1: Yes | |
62 | * 0: No | |
63 | */ | |
a455d0f6 | 64 | static int key_exchange_expected(SSL *s) |
61ae935a | 65 | { |
555cbb32 | 66 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
67 | |
68 | /* | |
69 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 70 | * ciphersuite or for SRP |
61ae935a | 71 | */ |
a455d0f6 MC |
72 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
73 | | SSL_kSRP)) { | |
74 | return 1; | |
61ae935a MC |
75 | } |
76 | ||
a455d0f6 | 77 | return 0; |
61ae935a MC |
78 | } |
79 | ||
0f1e51ea MC |
80 | /* |
81 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
82 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
83 | * server. The message type that the server has sent is provided in |mt|. The | |
84 | * current state is in |s->statem.hand_state|. | |
85 | * | |
94ed2c67 MC |
86 | * Return values are 1 for success (transition allowed) and 0 on error |
87 | * (transition not allowed) | |
0f1e51ea MC |
88 | */ |
89 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
90 | { | |
91 | OSSL_STATEM *st = &s->statem; | |
92 | ||
93 | /* | |
94 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
95 | * yet negotiated TLSv1.3 at that point so that is handled by | |
96 | * ossl_statem_client_read_transition() | |
97 | */ | |
98 | ||
99 | switch (st->hand_state) { | |
100 | default: | |
101 | break; | |
102 | ||
3847d426 MC |
103 | case TLS_ST_CW_CLNT_HELLO: |
104 | /* | |
105 | * This must a ClientHello following a HelloRetryRequest, so the only | |
106 | * thing we can get now is a ServerHello. | |
107 | */ | |
108 | if (mt == SSL3_MT_SERVER_HELLO) { | |
109 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
110 | return 1; | |
111 | } | |
112 | break; | |
113 | ||
0f1e51ea | 114 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
115 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
116 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
117 | return 1; | |
118 | } | |
119 | break; | |
120 | ||
121 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 122 | if (s->hit) { |
92760c21 MC |
123 | if (mt == SSL3_MT_FINISHED) { |
124 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
125 | return 1; |
126 | } | |
127 | } else { | |
92760c21 MC |
128 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
129 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
130 | return 1; | |
f5ca0b04 MC |
131 | } |
132 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
133 | st->hand_state = TLS_ST_CR_CERT; |
134 | return 1; | |
135 | } | |
136 | } | |
137 | break; | |
138 | ||
92760c21 MC |
139 | case TLS_ST_CR_CERT_REQ: |
140 | if (mt == SSL3_MT_CERTIFICATE) { | |
141 | st->hand_state = TLS_ST_CR_CERT; | |
142 | return 1; | |
143 | } | |
144 | break; | |
145 | ||
0f1e51ea | 146 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
147 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
148 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
149 | return 1; | |
150 | } | |
151 | break; | |
152 | ||
153 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
154 | if (mt == SSL3_MT_FINISHED) { |
155 | st->hand_state = TLS_ST_CR_FINISHED; | |
156 | return 1; | |
157 | } | |
158 | break; | |
cc2455bf MC |
159 | |
160 | case TLS_ST_OK: | |
161 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
162 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
163 | return 1; | |
164 | } | |
e1c3de44 MC |
165 | if (mt == SSL3_MT_KEY_UPDATE) { |
166 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
167 | return 1; | |
168 | } | |
9d75dce3 | 169 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 170 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
9d75dce3 TS |
171 | # error TODO(DTLS1.3): Restore digest for PHA before adding message. |
172 | #endif | |
173 | if (!SSL_IS_DTLS(s) && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
174 | s->post_handshake_auth = SSL_PHA_REQUESTED; | |
175 | /* | |
176 | * In TLS, this is called before the message is added to the | |
177 | * digest. In DTLS, this is expected to be called after adding | |
178 | * to the digest. Either move the digest restore, or add the | |
179 | * message here after the swap, or do it after the clientFinished? | |
180 | */ | |
181 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
182 | /* SSLfatal() already called */ | |
183 | return 0; | |
184 | } | |
185 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
186 | return 1; | |
187 | } | |
188 | } | |
cc2455bf | 189 | break; |
0f1e51ea MC |
190 | } |
191 | ||
0f1e51ea | 192 | /* No valid transition found */ |
0f1e51ea MC |
193 | return 0; |
194 | } | |
195 | ||
61ae935a | 196 | /* |
8481f583 MC |
197 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
198 | * handshake state transitions when the client is reading messages from the | |
199 | * server. The message type that the server has sent is provided in |mt|. The | |
200 | * current state is in |s->statem.hand_state|. | |
61ae935a | 201 | * |
94ed2c67 MC |
202 | * Return values are 1 for success (transition allowed) and 0 on error |
203 | * (transition not allowed) | |
61ae935a | 204 | */ |
8481f583 | 205 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 206 | { |
d6f1a6e9 | 207 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 208 | int ske_expected; |
61ae935a | 209 | |
0f1e51ea | 210 | /* |
3847d426 MC |
211 | * Note that after writing the first ClientHello we don't know what version |
212 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 213 | */ |
f5ca0b04 | 214 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
215 | if (!ossl_statem_client13_read_transition(s, mt)) |
216 | goto err; | |
217 | return 1; | |
218 | } | |
0f1e51ea | 219 | |
a230b26e | 220 | switch (st->hand_state) { |
f3b3d7f0 RS |
221 | default: |
222 | break; | |
223 | ||
61ae935a MC |
224 | case TLS_ST_CW_CLNT_HELLO: |
225 | if (mt == SSL3_MT_SERVER_HELLO) { | |
226 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
227 | return 1; | |
228 | } | |
229 | ||
230 | if (SSL_IS_DTLS(s)) { | |
231 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
232 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
233 | return 1; | |
234 | } | |
235 | } | |
236 | break; | |
237 | ||
d7f8783f | 238 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
239 | /* |
240 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
241 | * data. The only thing allowed now is a ServerHello or a | |
242 | * HelloRetryRequest. | |
243 | */ | |
244 | if (mt == SSL3_MT_SERVER_HELLO) { | |
245 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
246 | return 1; | |
247 | } | |
4004ce5f MC |
248 | break; |
249 | ||
61ae935a MC |
250 | case TLS_ST_CR_SRVR_HELLO: |
251 | if (s->hit) { | |
aff8c126 | 252 | if (s->ext.ticket_expected) { |
61ae935a MC |
253 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
254 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
255 | return 1; | |
256 | } | |
257 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
258 | st->hand_state = TLS_ST_CR_CHANGE; | |
259 | return 1; | |
260 | } | |
261 | } else { | |
262 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
263 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
264 | return 1; | |
ad3819c2 | 265 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
266 | && s->ext.session_secret_cb != NULL |
267 | && s->session->ext.tick != NULL | |
a230b26e | 268 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
269 | /* |
270 | * Normally, we can tell if the server is resuming the session | |
271 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
272 | * the next server message after the ServerHello to determine if | |
273 | * the server is resuming. | |
274 | */ | |
275 | s->hit = 1; | |
276 | st->hand_state = TLS_ST_CR_CHANGE; | |
277 | return 1; | |
555cbb32 | 278 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 279 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
280 | if (mt == SSL3_MT_CERTIFICATE) { |
281 | st->hand_state = TLS_ST_CR_CERT; | |
282 | return 1; | |
283 | } | |
284 | } else { | |
a455d0f6 | 285 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
286 | /* SKE is optional for some PSK ciphersuites */ |
287 | if (ske_expected | |
555cbb32 | 288 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 289 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
290 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
291 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
292 | return 1; | |
293 | } | |
294 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
295 | && cert_req_allowed(s)) { |
296 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
297 | return 1; | |
a455d0f6 | 298 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
299 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
300 | return 1; | |
61ae935a MC |
301 | } |
302 | } | |
303 | } | |
304 | break; | |
305 | ||
306 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
307 | /* |
308 | * The CertificateStatus message is optional even if | |
aff8c126 | 309 | * |ext.status_expected| is set |
bb1aaab4 | 310 | */ |
aff8c126 | 311 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
312 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
313 | return 1; | |
a455d0f6 MC |
314 | } |
315 | /* Fall through */ | |
316 | ||
317 | case TLS_ST_CR_CERT_STATUS: | |
318 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 319 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 320 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 321 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
322 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
323 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
324 | return 1; | |
61ae935a | 325 | } |
672f3337 | 326 | goto err; |
61ae935a | 327 | } |
a455d0f6 | 328 | /* Fall through */ |
61ae935a | 329 | |
a455d0f6 MC |
330 | case TLS_ST_CR_KEY_EXCH: |
331 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
332 | if (cert_req_allowed(s)) { | |
61ae935a MC |
333 | st->hand_state = TLS_ST_CR_CERT_REQ; |
334 | return 1; | |
61ae935a | 335 | } |
672f3337 | 336 | goto err; |
61ae935a | 337 | } |
a455d0f6 | 338 | /* Fall through */ |
61ae935a MC |
339 | |
340 | case TLS_ST_CR_CERT_REQ: | |
341 | if (mt == SSL3_MT_SERVER_DONE) { | |
342 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
343 | return 1; | |
344 | } | |
345 | break; | |
346 | ||
347 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 348 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
349 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
350 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
351 | return 1; | |
352 | } | |
61ae935a MC |
353 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
354 | st->hand_state = TLS_ST_CR_CHANGE; | |
355 | return 1; | |
356 | } | |
357 | break; | |
358 | ||
359 | case TLS_ST_CR_SESSION_TICKET: | |
360 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
361 | st->hand_state = TLS_ST_CR_CHANGE; | |
362 | return 1; | |
363 | } | |
364 | break; | |
365 | ||
366 | case TLS_ST_CR_CHANGE: | |
367 | if (mt == SSL3_MT_FINISHED) { | |
368 | st->hand_state = TLS_ST_CR_FINISHED; | |
369 | return 1; | |
370 | } | |
371 | break; | |
c7f47786 MC |
372 | |
373 | case TLS_ST_OK: | |
4004ce5f | 374 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
375 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
376 | return 1; | |
377 | } | |
378 | break; | |
61ae935a MC |
379 | } |
380 | ||
672f3337 | 381 | err: |
61ae935a | 382 | /* No valid transition found */ |
f20404fc MC |
383 | if (SSL_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
384 | BIO *rbio; | |
385 | ||
386 | /* | |
387 | * CCS messages don't have a message sequence number so this is probably | |
388 | * because of an out-of-order CCS. We'll just drop it. | |
389 | */ | |
390 | s->init_num = 0; | |
391 | s->rwstate = SSL_READING; | |
392 | rbio = SSL_get_rbio(s); | |
393 | BIO_clear_retry_flags(rbio); | |
394 | BIO_set_retry_read(rbio); | |
395 | return 0; | |
396 | } | |
c48ffbcc | 397 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
398 | return 0; |
399 | } | |
400 | ||
401 | /* | |
0f1e51ea MC |
402 | * ossl_statem_client13_write_transition() works out what handshake state to |
403 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
404 | * server. | |
0f1e51ea MC |
405 | */ |
406 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
407 | { | |
408 | OSSL_STATEM *st = &s->statem; | |
409 | ||
410 | /* | |
3847d426 MC |
411 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
412 | * TLSv1.3 yet at that point. They are handled by | |
413 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
414 | */ |
415 | switch (st->hand_state) { | |
e43e6b19 TS |
416 | default: |
417 | /* Shouldn't happen */ | |
c48ffbcc | 418 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e43e6b19 TS |
419 | return WRITE_TRAN_ERROR; |
420 | ||
9d75dce3 TS |
421 | case TLS_ST_CR_CERT_REQ: |
422 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
423 | st->hand_state = TLS_ST_CW_CERT; | |
424 | return WRITE_TRAN_CONTINUE; | |
425 | } | |
1bf4cb0f MC |
426 | /* |
427 | * We should only get here if we received a CertificateRequest after | |
428 | * we already sent close_notify | |
429 | */ | |
430 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
431 | /* Shouldn't happen - same as default case */ | |
c48ffbcc | 432 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1bf4cb0f MC |
433 | return WRITE_TRAN_ERROR; |
434 | } | |
435 | st->hand_state = TLS_ST_OK; | |
436 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 437 | |
92760c21 | 438 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
439 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
440 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 441 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 442 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 443 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 444 | st->hand_state = TLS_ST_CW_CHANGE; |
564547e4 | 445 | else |
555cbb32 | 446 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
564547e4 MC |
447 | : TLS_ST_CW_FINISHED; |
448 | return WRITE_TRAN_CONTINUE; | |
449 | ||
d7f8783f | 450 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
451 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
452 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
453 | return WRITE_TRAN_CONTINUE; | |
454 | } | |
455 | /* Fall through */ | |
456 | ||
457 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 458 | case TLS_ST_CW_CHANGE: |
555cbb32 | 459 | st->hand_state = (s->s3.tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 460 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
461 | return WRITE_TRAN_CONTINUE; |
462 | ||
463 | case TLS_ST_CW_CERT: | |
464 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 465 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 466 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
467 | return WRITE_TRAN_CONTINUE; |
468 | ||
469 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
470 | st->hand_state = TLS_ST_CW_FINISHED; |
471 | return WRITE_TRAN_CONTINUE; | |
472 | ||
e1c3de44 | 473 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 474 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 475 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 476 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 477 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 478 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
479 | |
480 | case TLS_ST_OK: | |
9412b3ad MC |
481 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
482 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
483 | return WRITE_TRAN_CONTINUE; | |
484 | } | |
485 | ||
486 | /* Try to read from the server instead */ | |
cc2455bf | 487 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
488 | } |
489 | } | |
490 | ||
491 | /* | |
492 | * ossl_statem_client_write_transition() works out what handshake state to | |
493 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 494 | */ |
8481f583 | 495 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 496 | { |
d6f1a6e9 | 497 | OSSL_STATEM *st = &s->statem; |
61ae935a | 498 | |
0f1e51ea MC |
499 | /* |
500 | * Note that immediately before/after a ClientHello we don't know what | |
501 | * version we are going to negotiate yet, so we don't take this branch until | |
502 | * later | |
503 | */ | |
f5ca0b04 | 504 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
505 | return ossl_statem_client13_write_transition(s); |
506 | ||
a230b26e | 507 | switch (st->hand_state) { |
f3b3d7f0 RS |
508 | default: |
509 | /* Shouldn't happen */ | |
c48ffbcc | 510 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
511 | return WRITE_TRAN_ERROR; |
512 | ||
a230b26e | 513 | case TLS_ST_OK: |
c7f47786 MC |
514 | if (!s->renegotiate) { |
515 | /* | |
516 | * We haven't requested a renegotiation ourselves so we must have | |
517 | * received a message from the server. Better read it. | |
518 | */ | |
519 | return WRITE_TRAN_FINISHED; | |
520 | } | |
018fcbec BE |
521 | /* Renegotiation */ |
522 | /* fall thru */ | |
a230b26e EK |
523 | case TLS_ST_BEFORE: |
524 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
525 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 526 | |
a230b26e | 527 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
528 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
529 | /* | |
530 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
531 | * actually selected a version yet. | |
532 | */ | |
066904cc MC |
533 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
534 | st->hand_state = TLS_ST_CW_CHANGE; | |
535 | else | |
536 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
537 | return WRITE_TRAN_CONTINUE; |
538 | } | |
a230b26e EK |
539 | /* |
540 | * No transition at the end of writing because we don't know what | |
541 | * we will be sent | |
542 | */ | |
543 | return WRITE_TRAN_FINISHED; | |
61ae935a | 544 | |
597c51bc | 545 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
546 | /* |
547 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
548 | * CCS unless middlebox compat mode is off, or we already issued one | |
549 | * because we did early data. | |
550 | */ | |
551 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
552 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
553 | st->hand_state = TLS_ST_CW_CHANGE; | |
554 | else | |
555 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
556 | return WRITE_TRAN_CONTINUE; |
557 | ||
d7f8783f | 558 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
559 | return WRITE_TRAN_FINISHED; |
560 | ||
a230b26e EK |
561 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
562 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
563 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 564 | |
a230b26e | 565 | case TLS_ST_CR_SRVR_DONE: |
555cbb32 | 566 | if (s->s3.tmp.cert_req) |
a230b26e EK |
567 | st->hand_state = TLS_ST_CW_CERT; |
568 | else | |
61ae935a | 569 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 570 | return WRITE_TRAN_CONTINUE; |
61ae935a | 571 | |
a230b26e EK |
572 | case TLS_ST_CW_CERT: |
573 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
574 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 575 | |
a230b26e EK |
576 | case TLS_ST_CW_KEY_EXCH: |
577 | /* | |
578 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
579 | * sent, but no verify packet is sent | |
580 | */ | |
581 | /* | |
582 | * XXX: For now, we do not support client authentication in ECDH | |
583 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
584 | * need to skip the certificate verify message when client's | |
585 | * ECDH public key is sent inside the client certificate. | |
586 | */ | |
555cbb32 | 587 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
588 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
589 | } else { | |
61ae935a | 590 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 591 | } |
555cbb32 | 592 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
593 | st->hand_state = TLS_ST_CW_CHANGE; |
594 | } | |
595 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 596 | |
a230b26e EK |
597 | case TLS_ST_CW_CERT_VRFY: |
598 | st->hand_state = TLS_ST_CW_CHANGE; | |
599 | return WRITE_TRAN_CONTINUE; | |
600 | ||
601 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
602 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
603 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
604 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
605 | st->hand_state = TLS_ST_EARLY_DATA; |
606 | } else { | |
61ae935a | 607 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 608 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 609 | #else |
555cbb32 | 610 | if (!SSL_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
611 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
612 | else | |
613 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 614 | #endif |
066904cc | 615 | } |
a230b26e | 616 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
617 | |
618 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
619 | case TLS_ST_CW_NEXT_PROTO: |
620 | st->hand_state = TLS_ST_CW_FINISHED; | |
621 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
622 | #endif |
623 | ||
a230b26e EK |
624 | case TLS_ST_CW_FINISHED: |
625 | if (s->hit) { | |
626 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
627 | return WRITE_TRAN_CONTINUE; |
628 | } else { | |
629 | return WRITE_TRAN_FINISHED; | |
630 | } | |
61ae935a | 631 | |
a230b26e EK |
632 | case TLS_ST_CR_FINISHED: |
633 | if (s->hit) { | |
634 | st->hand_state = TLS_ST_CW_CHANGE; | |
635 | return WRITE_TRAN_CONTINUE; | |
636 | } else { | |
637 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
638 | return WRITE_TRAN_CONTINUE; |
639 | } | |
c7f47786 MC |
640 | |
641 | case TLS_ST_CR_HELLO_REQ: | |
642 | /* | |
643 | * If we can renegotiate now then do so, otherwise wait for a more | |
644 | * convenient time. | |
645 | */ | |
646 | if (ssl3_renegotiate_check(s, 1)) { | |
647 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 648 | /* SSLfatal() already called */ |
c7f47786 MC |
649 | return WRITE_TRAN_ERROR; |
650 | } | |
651 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
652 | return WRITE_TRAN_CONTINUE; | |
653 | } | |
654 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 655 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
656 | } |
657 | } | |
658 | ||
659 | /* | |
660 | * Perform any pre work that needs to be done prior to sending a message from | |
661 | * the client to the server. | |
662 | */ | |
8481f583 | 663 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 664 | { |
d6f1a6e9 | 665 | OSSL_STATEM *st = &s->statem; |
61ae935a | 666 | |
a230b26e | 667 | switch (st->hand_state) { |
f3b3d7f0 RS |
668 | default: |
669 | /* No pre work to be done */ | |
670 | break; | |
671 | ||
61ae935a MC |
672 | case TLS_ST_CW_CLNT_HELLO: |
673 | s->shutdown = 0; | |
674 | if (SSL_IS_DTLS(s)) { | |
675 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 676 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 677 | /* SSLfatal() already called */ |
2c4a056f MC |
678 | return WORK_ERROR; |
679 | } | |
61ae935a MC |
680 | } |
681 | break; | |
682 | ||
61ae935a MC |
683 | case TLS_ST_CW_CHANGE: |
684 | if (SSL_IS_DTLS(s)) { | |
685 | if (s->hit) { | |
686 | /* | |
687 | * We're into the last flight so we don't retransmit these | |
688 | * messages unless we need to. | |
689 | */ | |
690 | st->use_timer = 0; | |
691 | } | |
692 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
693 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
694 | /* Calls SSLfatal() as required */ | |
61ae935a | 695 | return dtls_wait_for_dry(s); |
a2c2e000 | 696 | } |
61ae935a MC |
697 | #endif |
698 | } | |
f3b3d7f0 | 699 | break; |
61ae935a | 700 | |
d7f8783f | 701 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
702 | /* |
703 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
704 | * attempt to write early data before calling SSL_read() then we press | |
705 | * on with the handshake. Otherwise we pause here. | |
706 | */ | |
707 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
708 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
709 | return WORK_FINISHED_CONTINUE; | |
710 | /* Fall through */ | |
711 | ||
712 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
713 | return tls_finish_handshake(s, wst, 0, 1); |
714 | ||
61ae935a | 715 | case TLS_ST_OK: |
a2c2e000 | 716 | /* Calls SSLfatal() as required */ |
2a8db717 | 717 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
718 | } |
719 | ||
720 | return WORK_FINISHED_CONTINUE; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Perform any work that needs to be done after sending a message from the | |
725 | * client to the server. | |
726 | */ | |
8481f583 | 727 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 728 | { |
d6f1a6e9 | 729 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
730 | |
731 | s->init_num = 0; | |
732 | ||
a230b26e | 733 | switch (st->hand_state) { |
f3b3d7f0 RS |
734 | default: |
735 | /* No post work to be done */ | |
736 | break; | |
737 | ||
61ae935a | 738 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 739 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 740 | && s->max_early_data > 0) { |
6cb42265 MC |
741 | /* |
742 | * We haven't selected TLSv1.3 yet so we don't call the change | |
743 | * cipher state function associated with the SSL_METHOD. Instead | |
744 | * we call tls13_change_cipher_state() directly. | |
745 | */ | |
5cc807da | 746 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
747 | if (!tls13_change_cipher_state(s, |
748 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
749 | /* SSLfatal() already called */ | |
750 | return WORK_ERROR; | |
751 | } | |
a2c2e000 | 752 | } |
5cc807da MC |
753 | /* else we're in compat mode so we delay flushing until after CCS */ |
754 | } else if (!statem_flush(s)) { | |
755 | return WORK_MORE_A; | |
756 | } | |
757 | ||
758 | if (SSL_IS_DTLS(s)) { | |
759 | /* Treat the next message as the first packet */ | |
760 | s->first_packet = 1; | |
6cb42265 | 761 | } |
61ae935a MC |
762 | break; |
763 | ||
ef6c191b MC |
764 | case TLS_ST_CW_END_OF_EARLY_DATA: |
765 | /* | |
766 | * We set the enc_write_ctx back to NULL because we may end up writing | |
767 | * in cleartext again if we get a HelloRetryRequest from the server. | |
768 | */ | |
769 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
770 | s->enc_write_ctx = NULL; | |
771 | break; | |
772 | ||
61ae935a | 773 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
774 | if (tls_client_key_exchange_post_work(s) == 0) { |
775 | /* SSLfatal() already called */ | |
61ae935a | 776 | return WORK_ERROR; |
a2c2e000 | 777 | } |
61ae935a MC |
778 | break; |
779 | ||
780 | case TLS_ST_CW_CHANGE: | |
318d3c0e | 781 | if (SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING) |
4d02f870 | 782 | break; |
066904cc MC |
783 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
784 | && s->max_early_data > 0) { | |
785 | /* | |
786 | * We haven't selected TLSv1.3 yet so we don't call the change | |
787 | * cipher state function associated with the SSL_METHOD. Instead | |
788 | * we call tls13_change_cipher_state() directly. | |
789 | */ | |
790 | if (!tls13_change_cipher_state(s, | |
791 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
792 | return WORK_ERROR; | |
793 | break; | |
794 | } | |
555cbb32 | 795 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
796 | #ifdef OPENSSL_NO_COMP |
797 | s->session->compress_meth = 0; | |
798 | #else | |
555cbb32 | 799 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
800 | s->session->compress_meth = 0; |
801 | else | |
555cbb32 | 802 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 803 | #endif |
a2c2e000 MC |
804 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
805 | /* SSLfatal() already called */ | |
61ae935a | 806 | return WORK_ERROR; |
a2c2e000 | 807 | } |
61ae935a MC |
808 | |
809 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
810 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
811 | /* SSLfatal() already called */ | |
61ae935a | 812 | return WORK_ERROR; |
a2c2e000 | 813 | } |
61ae935a MC |
814 | |
815 | if (SSL_IS_DTLS(s)) { | |
816 | #ifndef OPENSSL_NO_SCTP | |
817 | if (s->hit) { | |
818 | /* | |
819 | * Change to new shared key of SCTP-Auth, will be ignored if | |
820 | * no SCTP used. | |
821 | */ | |
822 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
823 | 0, NULL); | |
824 | } | |
825 | #endif | |
826 | ||
827 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
828 | } | |
829 | break; | |
830 | ||
831 | case TLS_ST_CW_FINISHED: | |
832 | #ifndef OPENSSL_NO_SCTP | |
833 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
834 | /* | |
835 | * Change to new shared key of SCTP-Auth, will be ignored if | |
836 | * no SCTP used. | |
837 | */ | |
838 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
839 | 0, NULL); | |
840 | } | |
841 | #endif | |
842 | if (statem_flush(s) != 1) | |
843 | return WORK_MORE_B; | |
92760c21 MC |
844 | |
845 | if (SSL_IS_TLS13(s)) { | |
9d75dce3 | 846 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
847 | /* SSLfatal() already called */ |
848 | return WORK_ERROR; | |
849 | } | |
9d75dce3 TS |
850 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
851 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
852 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
853 | /* SSLfatal() already called */ | |
854 | return WORK_ERROR; | |
855 | } | |
856 | } | |
92760c21 | 857 | } |
61ae935a | 858 | break; |
9412b3ad MC |
859 | |
860 | case TLS_ST_CW_KEY_UPDATE: | |
861 | if (statem_flush(s) != 1) | |
862 | return WORK_MORE_A; | |
a2c2e000 MC |
863 | if (!tls13_update_key(s, 1)) { |
864 | /* SSLfatal() already called */ | |
57389a32 | 865 | return WORK_ERROR; |
a2c2e000 | 866 | } |
9412b3ad | 867 | break; |
61ae935a MC |
868 | } |
869 | ||
870 | return WORK_FINISHED_CONTINUE; | |
871 | } | |
872 | ||
873 | /* | |
6392fb8e MC |
874 | * Get the message construction function and message type for sending from the |
875 | * client | |
61ae935a MC |
876 | * |
877 | * Valid return values are: | |
878 | * 1: Success | |
879 | * 0: Error | |
880 | */ | |
6392fb8e | 881 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 882 | confunc_f *confunc, int *mt) |
61ae935a | 883 | { |
d6f1a6e9 | 884 | OSSL_STATEM *st = &s->statem; |
61ae935a | 885 | |
4a01c59f MC |
886 | switch (st->hand_state) { |
887 | default: | |
888 | /* Shouldn't happen */ | |
c48ffbcc | 889 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_STATE); |
4a01c59f MC |
890 | return 0; |
891 | ||
892 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 893 | if (SSL_IS_DTLS(s)) |
6392fb8e | 894 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 895 | else |
6392fb8e MC |
896 | *confunc = tls_construct_change_cipher_spec; |
897 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
898 | break; |
899 | ||
900 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
901 | *confunc = tls_construct_client_hello; |
902 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
903 | break; |
904 | ||
ef6c191b MC |
905 | case TLS_ST_CW_END_OF_EARLY_DATA: |
906 | *confunc = tls_construct_end_of_early_data; | |
907 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
908 | break; | |
909 | ||
910 | case TLS_ST_PENDING_EARLY_DATA_END: | |
911 | *confunc = NULL; | |
912 | *mt = SSL3_MT_DUMMY; | |
913 | break; | |
914 | ||
4a01c59f | 915 | case TLS_ST_CW_CERT: |
6392fb8e MC |
916 | *confunc = tls_construct_client_certificate; |
917 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
918 | break; |
919 | ||
920 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
921 | *confunc = tls_construct_client_key_exchange; |
922 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
923 | break; |
924 | ||
925 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 926 | *confunc = tls_construct_cert_verify; |
6392fb8e | 927 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 928 | break; |
61ae935a MC |
929 | |
930 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 931 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
932 | *confunc = tls_construct_next_proto; |
933 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 934 | break; |
61ae935a | 935 | #endif |
4a01c59f | 936 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
937 | *confunc = tls_construct_finished; |
938 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 939 | break; |
9412b3ad MC |
940 | |
941 | case TLS_ST_CW_KEY_UPDATE: | |
942 | *confunc = tls_construct_key_update; | |
943 | *mt = SSL3_MT_KEY_UPDATE; | |
944 | break; | |
4a01c59f | 945 | } |
5923ad4b | 946 | |
5923ad4b | 947 | return 1; |
61ae935a MC |
948 | } |
949 | ||
950 | /* | |
951 | * Returns the maximum allowed length for the current message that we are | |
952 | * reading. Excludes the message header. | |
953 | */ | |
eda75751 | 954 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 955 | { |
d6f1a6e9 | 956 | OSSL_STATEM *st = &s->statem; |
61ae935a | 957 | |
a230b26e | 958 | switch (st->hand_state) { |
f3b3d7f0 RS |
959 | default: |
960 | /* Shouldn't happen */ | |
961 | return 0; | |
962 | ||
a230b26e EK |
963 | case TLS_ST_CR_SRVR_HELLO: |
964 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 965 | |
a230b26e EK |
966 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
967 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 968 | |
a230b26e EK |
969 | case TLS_ST_CR_CERT: |
970 | return s->max_cert_list; | |
61ae935a | 971 | |
2c5dfdc3 MC |
972 | case TLS_ST_CR_CERT_VRFY: |
973 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
974 | ||
a230b26e EK |
975 | case TLS_ST_CR_CERT_STATUS: |
976 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 977 | |
a230b26e EK |
978 | case TLS_ST_CR_KEY_EXCH: |
979 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 980 | |
a230b26e EK |
981 | case TLS_ST_CR_CERT_REQ: |
982 | /* | |
983 | * Set to s->max_cert_list for compatibility with previous releases. In | |
984 | * practice these messages can get quite long if servers are configured | |
985 | * to provide a long list of acceptable CAs | |
986 | */ | |
987 | return s->max_cert_list; | |
61ae935a | 988 | |
a230b26e EK |
989 | case TLS_ST_CR_SRVR_DONE: |
990 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 991 | |
a230b26e EK |
992 | case TLS_ST_CR_CHANGE: |
993 | if (s->version == DTLS1_BAD_VER) | |
994 | return 3; | |
995 | return CCS_MAX_LENGTH; | |
61ae935a | 996 | |
a230b26e EK |
997 | case TLS_ST_CR_SESSION_TICKET: |
998 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 999 | |
a230b26e EK |
1000 | case TLS_ST_CR_FINISHED: |
1001 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1002 | |
1003 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1004 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1005 | |
1006 | case TLS_ST_CR_KEY_UPDATE: | |
1007 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1008 | } |
61ae935a MC |
1009 | } |
1010 | ||
1011 | /* | |
0c3eb279 | 1012 | * Process a message that the client has received from the server. |
61ae935a | 1013 | */ |
8481f583 | 1014 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 1015 | { |
d6f1a6e9 | 1016 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1017 | |
a230b26e | 1018 | switch (st->hand_state) { |
f3b3d7f0 RS |
1019 | default: |
1020 | /* Shouldn't happen */ | |
c48ffbcc | 1021 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1022 | return MSG_PROCESS_ERROR; |
1023 | ||
a230b26e EK |
1024 | case TLS_ST_CR_SRVR_HELLO: |
1025 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1026 | |
a230b26e EK |
1027 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1028 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1029 | |
a230b26e EK |
1030 | case TLS_ST_CR_CERT: |
1031 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1032 | |
2c5dfdc3 MC |
1033 | case TLS_ST_CR_CERT_VRFY: |
1034 | return tls_process_cert_verify(s, pkt); | |
1035 | ||
a230b26e EK |
1036 | case TLS_ST_CR_CERT_STATUS: |
1037 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1038 | |
a230b26e EK |
1039 | case TLS_ST_CR_KEY_EXCH: |
1040 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1041 | |
a230b26e EK |
1042 | case TLS_ST_CR_CERT_REQ: |
1043 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1044 | |
a230b26e EK |
1045 | case TLS_ST_CR_SRVR_DONE: |
1046 | return tls_process_server_done(s, pkt); | |
61ae935a | 1047 | |
a230b26e EK |
1048 | case TLS_ST_CR_CHANGE: |
1049 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1050 | |
a230b26e EK |
1051 | case TLS_ST_CR_SESSION_TICKET: |
1052 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1053 | |
a230b26e EK |
1054 | case TLS_ST_CR_FINISHED: |
1055 | return tls_process_finished(s, pkt); | |
e46f2334 | 1056 | |
c7f47786 MC |
1057 | case TLS_ST_CR_HELLO_REQ: |
1058 | return tls_process_hello_req(s, pkt); | |
1059 | ||
e46f2334 MC |
1060 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1061 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1062 | |
1063 | case TLS_ST_CR_KEY_UPDATE: | |
1064 | return tls_process_key_update(s, pkt); | |
61ae935a | 1065 | } |
61ae935a MC |
1066 | } |
1067 | ||
1068 | /* | |
1069 | * Perform any further processing required following the receipt of a message | |
1070 | * from the server | |
1071 | */ | |
8481f583 | 1072 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1073 | { |
d6f1a6e9 | 1074 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1075 | |
a230b26e | 1076 | switch (st->hand_state) { |
f3b3d7f0 RS |
1077 | default: |
1078 | /* Shouldn't happen */ | |
c48ffbcc | 1079 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1080 | return WORK_ERROR; |
1081 | ||
0c3eb279 DDO |
1082 | case TLS_ST_CR_CERT: |
1083 | return tls_post_process_server_certificate(s, wst); | |
1084 | ||
e4562014 | 1085 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1086 | case TLS_ST_CR_CERT_REQ: |
1087 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1088 | } |
61ae935a MC |
1089 | } |
1090 | ||
7cea05dc | 1091 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1092 | { |
2c7b4dbc | 1093 | unsigned char *p; |
ec60ccc1 MC |
1094 | size_t sess_id_len; |
1095 | int i, protverr; | |
09b6c2ef | 1096 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1097 | SSL_COMP *comp; |
1098 | #endif | |
b9908bf9 | 1099 | SSL_SESSION *sess = s->session; |
a5816a5a | 1100 | unsigned char *session_id; |
0f113f3e | 1101 | |
b9908bf9 | 1102 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1103 | protverr = ssl_set_client_hello_version(s); |
1104 | if (protverr != 0) { | |
c48ffbcc | 1105 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, protverr); |
7cea05dc | 1106 | return 0; |
4fa52141 | 1107 | } |
0f113f3e | 1108 | |
e586eac8 | 1109 | if (sess == NULL |
4fd12788 | 1110 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1111 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1112 | if (s->hello_retry_request == SSL_HRR_NONE |
1113 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1114 | /* SSLfatal() already called */ |
7cea05dc | 1115 | return 0; |
f63a17d6 | 1116 | } |
b9908bf9 MC |
1117 | } |
1118 | /* else use the pre-loaded session */ | |
0f113f3e | 1119 | |
555cbb32 | 1120 | p = s->s3.client_random; |
0f113f3e | 1121 | |
b9908bf9 MC |
1122 | /* |
1123 | * for DTLS if client_random is initialized, reuse it, we are | |
1124 | * required to use same upon reply to HelloVerify | |
1125 | */ | |
1126 | if (SSL_IS_DTLS(s)) { | |
1127 | size_t idx; | |
1128 | i = 1; | |
555cbb32 | 1129 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1130 | if (p[idx]) { |
1131 | i = 0; | |
1132 | break; | |
0f113f3e | 1133 | } |
0f113f3e | 1134 | } |
751b26b1 | 1135 | } else { |
fc7129dc | 1136 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1137 | } |
0f113f3e | 1138 | |
555cbb32 | 1139 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 | 1140 | DOWNGRADE_NONE) <= 0) { |
c48ffbcc | 1141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1142 | return 0; |
f63a17d6 | 1143 | } |
b9908bf9 | 1144 | |
b9908bf9 MC |
1145 | /*- |
1146 | * version indicates the negotiated version: for example from | |
1147 | * an SSLv2/v3 compatible client hello). The client_version | |
1148 | * field is the maximum version we permit and it is also | |
1149 | * used in RSA encrypted premaster secrets. Some servers can | |
1150 | * choke if we initially report a higher version then | |
1151 | * renegotiate to a lower one in the premaster secret. This | |
1152 | * didn't happen with TLS 1.0 as most servers supported it | |
1153 | * but it can with TLS 1.1 or later if the server only supports | |
1154 | * 1.0. | |
1155 | * | |
1156 | * Possible scenario with previous logic: | |
1157 | * 1. Client hello indicates TLS 1.2 | |
1158 | * 2. Server hello says TLS 1.0 | |
1159 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1160 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1161 | * 5. Server sends hello request to renegotiate. |
1162 | * 6. Client hello indicates TLS v1.0 as we now | |
1163 | * know that is maximum server supports. | |
1164 | * 7. Server chokes on RSA encrypted premaster secret | |
1165 | * containing version 1.0. | |
1166 | * | |
1167 | * For interoperability it should be OK to always use the | |
1168 | * maximum version we support in client hello and then rely | |
1169 | * on the checking of version to ensure the servers isn't | |
1170 | * being inconsistent: for example initially negotiating with | |
1171 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1172 | * client_version in client hello and not resetting it to | |
1173 | * the negotiated version. | |
cd998837 MC |
1174 | * |
1175 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1176 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1177 | */ |
7acb8b64 | 1178 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1179 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1180 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1181 | return 0; |
2c7b4dbc | 1182 | } |
b9908bf9 MC |
1183 | |
1184 | /* Session ID */ | |
a5816a5a MC |
1185 | session_id = s->session->session_id; |
1186 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1187 | if (s->version == TLS1_3_VERSION | |
1188 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1189 | sess_id_len = sizeof(s->tmp_session_id); | |
1190 | s->tmp_session_id_len = sess_id_len; | |
1191 | session_id = s->tmp_session_id; | |
fc7129dc | 1192 | if (s->hello_retry_request == SSL_HRR_NONE |
8f21260b MC |
1193 | && RAND_bytes_ex(s->ctx->libctx, s->tmp_session_id, |
1194 | sess_id_len) <= 0) { | |
c48ffbcc | 1195 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
a5816a5a MC |
1196 | return 0; |
1197 | } | |
1198 | } else { | |
1199 | sess_id_len = 0; | |
1200 | } | |
1201 | } else { | |
dee0cc10 | 1202 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1203 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1204 | if (s->version == TLS1_3_VERSION) { |
1205 | s->tmp_session_id_len = sess_id_len; | |
1206 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1207 | } | |
1208 | } | |
dee0cc10 | 1209 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1210 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1211 | sess_id_len)) |
7cea05dc | 1212 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1213 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1214 | return 0; |
b9908bf9 | 1215 | } |
0f113f3e | 1216 | |
b9908bf9 MC |
1217 | /* cookie stuff for DTLS */ |
1218 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1219 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1220 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1221 | s->d1->cookie_len)) { |
c48ffbcc | 1222 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1223 | return 0; |
0f113f3e | 1224 | } |
b9908bf9 MC |
1225 | } |
1226 | ||
1227 | /* Ciphers supported */ | |
7cea05dc | 1228 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1229 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1230 | return 0; |
2c7b4dbc | 1231 | } |
635c8f77 | 1232 | |
f63a17d6 MC |
1233 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1234 | /* SSLfatal() already called */ | |
7cea05dc | 1235 | return 0; |
f63a17d6 | 1236 | } |
7cea05dc | 1237 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 1238 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1239 | return 0; |
b9908bf9 | 1240 | } |
0f113f3e | 1241 | |
b9908bf9 | 1242 | /* COMPRESSION */ |
7cea05dc | 1243 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
c48ffbcc | 1244 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1245 | return 0; |
2c7b4dbc MC |
1246 | } |
1247 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1248 | if (ssl_allow_compression(s) |
1249 | && s->ctx->comp_methods | |
555cbb32 | 1250 | && (SSL_IS_DTLS(s) || s->s3.tmp.max_ver < TLS1_3_VERSION)) { |
2c7b4dbc MC |
1251 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1252 | for (i = 0; i < compnum; i++) { | |
1253 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1254 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
c48ffbcc | 1255 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1256 | return 0; |
2c7b4dbc MC |
1257 | } |
1258 | } | |
b9908bf9 | 1259 | } |
09b6c2ef | 1260 | #endif |
2c7b4dbc | 1261 | /* Add the NULL method */ |
7cea05dc | 1262 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
c48ffbcc | 1263 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1264 | return 0; |
2c7b4dbc | 1265 | } |
761772d7 | 1266 | |
b9908bf9 | 1267 | /* TLS extensions */ |
f63a17d6 MC |
1268 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1269 | /* SSLfatal() already called */ | |
7cea05dc | 1270 | return 0; |
b9908bf9 | 1271 | } |
0f113f3e | 1272 | |
b9908bf9 | 1273 | return 1; |
0f113f3e | 1274 | } |
d02b48c6 | 1275 | |
be3583fa | 1276 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1277 | { |
cb150cbc | 1278 | size_t cookie_len; |
8ba708e5 MC |
1279 | PACKET cookiepkt; |
1280 | ||
1281 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1282 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
c48ffbcc | 1283 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1284 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1285 | } |
1286 | ||
1287 | cookie_len = PACKET_remaining(&cookiepkt); | |
1288 | if (cookie_len > sizeof(s->d1->cookie)) { | |
c48ffbcc | 1289 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_LENGTH_TOO_LONG); |
f63a17d6 | 1290 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1291 | } |
1292 | ||
1293 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
c48ffbcc | 1294 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1295 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1296 | } |
1297 | s->d1->cookie_len = cookie_len; | |
1298 | ||
1299 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1300 | } |
1301 | ||
11c67eea | 1302 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1303 | { |
1304 | STACK_OF(SSL_CIPHER) *sk; | |
1305 | const SSL_CIPHER *c; | |
11c67eea MC |
1306 | int i; |
1307 | ||
1308 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1309 | if (c == NULL) { | |
1310 | /* unknown cipher */ | |
c48ffbcc | 1311 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CIPHER_RETURNED); |
11c67eea MC |
1312 | return 0; |
1313 | } | |
1314 | /* | |
1315 | * If it is a disabled cipher we either didn't send it in client hello, | |
1316 | * or it's not allowed for the selected protocol. So we return an error. | |
1317 | */ | |
8af91fd9 | 1318 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
c48ffbcc | 1319 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1320 | return 0; |
1321 | } | |
1322 | ||
1323 | sk = ssl_get_ciphers_by_id(s); | |
1324 | i = sk_SSL_CIPHER_find(sk, c); | |
1325 | if (i < 0) { | |
1326 | /* we did not say we would use this cipher */ | |
c48ffbcc | 1327 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1328 | return 0; |
1329 | } | |
1330 | ||
555cbb32 TS |
1331 | if (SSL_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
1332 | && s->s3.tmp.new_cipher->id != c->id) { | |
11c67eea | 1333 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
c48ffbcc | 1334 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1335 | return 0; |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * Depending on the session caching (internal/external), the cipher | |
1340 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1341 | * set and use it for comparison. | |
1342 | */ | |
1343 | if (s->session->cipher != NULL) | |
1344 | s->session->cipher_id = s->session->cipher->id; | |
1345 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1346 | if (SSL_IS_TLS13(s)) { |
1347 | /* | |
1348 | * In TLSv1.3 it is valid for the server to select a different | |
1349 | * ciphersuite as long as the hash is the same. | |
1350 | */ | |
c8f6c28a MC |
1351 | if (ssl_md(s->ctx, c->algorithm2) |
1352 | != ssl_md(s->ctx, s->session->cipher->algorithm2)) { | |
f63a17d6 | 1353 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1354 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); |
a055a881 MC |
1355 | return 0; |
1356 | } | |
1357 | } else { | |
1358 | /* | |
1359 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1360 | * ciphersuite. | |
1361 | */ | |
c48ffbcc | 1362 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1363 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
a055a881 MC |
1364 | return 0; |
1365 | } | |
11c67eea | 1366 | } |
555cbb32 | 1367 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1368 | |
1369 | return 1; | |
1370 | } | |
1371 | ||
1372 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1373 | { | |
332eb390 | 1374 | PACKET session_id, extpkt; |
b9908bf9 | 1375 | size_t session_id_len; |
b6981744 | 1376 | const unsigned char *cipherchars; |
597c51bc | 1377 | int hrr = 0; |
b9908bf9 | 1378 | unsigned int compression; |
4fa52141 | 1379 | unsigned int sversion; |
3434f40b | 1380 | unsigned int context; |
332eb390 | 1381 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1382 | #ifndef OPENSSL_NO_COMP |
1383 | SSL_COMP *comp; | |
1384 | #endif | |
1385 | ||
4fa52141 | 1386 | if (!PACKET_get_net_2(pkt, &sversion)) { |
c48ffbcc | 1387 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1388 | goto err; |
4fa52141 | 1389 | } |
50932c4a | 1390 | |
c3043dcd | 1391 | /* load the server random */ |
597c51bc MC |
1392 | if (s->version == TLS1_3_VERSION |
1393 | && sversion == TLS1_2_VERSION | |
1394 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1395 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
fc7129dc MC |
1396 | s->hello_retry_request = SSL_HRR_PENDING; |
1397 | hrr = 1; | |
597c51bc | 1398 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1399 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1400 | goto err; |
1401 | } | |
1402 | } else { | |
555cbb32 | 1403 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1404 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1405 | goto err; |
1406 | } | |
c3043dcd MC |
1407 | } |
1408 | ||
88050dd1 MC |
1409 | /* Get the session-id. */ |
1410 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
c48ffbcc | 1411 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1412 | goto err; |
0f113f3e | 1413 | } |
88050dd1 MC |
1414 | session_id_len = PACKET_remaining(&session_id); |
1415 | if (session_id_len > sizeof(s->session->session_id) | |
1416 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
c48ffbcc | 1417 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
f63a17d6 | 1418 | goto err; |
524420d8 MC |
1419 | } |
1420 | ||
73999b62 | 1421 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
c48ffbcc | 1422 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1423 | goto err; |
fc5ce51d EK |
1424 | } |
1425 | ||
88050dd1 | 1426 | if (!PACKET_get_1(pkt, &compression)) { |
c48ffbcc | 1427 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 | 1428 | goto err; |
4ff65f77 MC |
1429 | } |
1430 | ||
1431 | /* TLS extensions */ | |
597c51bc | 1432 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1433 | PACKET_null_init(&extpkt); |
26b9172a MC |
1434 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1435 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1436 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1437 | goto err; |
4ff65f77 MC |
1438 | } |
1439 | ||
597c51bc MC |
1440 | if (!hrr) { |
1441 | if (!tls_collect_extensions(s, &extpkt, | |
1442 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1443 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1444 | &extensions, NULL, 1)) { | |
1445 | /* SSLfatal() already called */ | |
1446 | goto err; | |
1447 | } | |
1448 | ||
1449 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1450 | /* SSLfatal() already called */ | |
1451 | goto err; | |
1452 | } | |
88050dd1 MC |
1453 | } |
1454 | ||
597c51bc MC |
1455 | if (SSL_IS_TLS13(s) || hrr) { |
1456 | if (compression != 0) { | |
1457 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
597c51bc MC |
1458 | SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1459 | goto err; | |
1460 | } | |
1461 | ||
1462 | if (session_id_len != s->tmp_session_id_len | |
1463 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1464 | session_id_len) != 0) { | |
c48ffbcc | 1465 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INVALID_SESSION_ID); |
597c51bc MC |
1466 | goto err; |
1467 | } | |
1468 | } | |
1469 | ||
1470 | if (hrr) { | |
1471 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1472 | /* SSLfatal() already called */ | |
1473 | goto err; | |
1474 | } | |
1475 | ||
1476 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1477 | } |
1478 | ||
1479 | /* | |
1480 | * Now we have chosen the version we need to check again that the extensions | |
1481 | * are appropriate for this version. | |
1482 | */ | |
fe874d27 MC |
1483 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1484 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 | 1485 | if (!tls_validate_all_contexts(s, context, extensions)) { |
c48ffbcc | 1486 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
88050dd1 MC |
1487 | goto err; |
1488 | } | |
1489 | ||
4ff65f77 MC |
1490 | s->hit = 0; |
1491 | ||
1492 | if (SSL_IS_TLS13(s)) { | |
a5816a5a MC |
1493 | /* |
1494 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1495 | * the message must be on a record boundary. | |
1496 | */ | |
1497 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1498 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
a5816a5a MC |
1499 | SSL_R_NOT_ON_RECORD_BOUNDARY); |
1500 | goto err; | |
1501 | } | |
1502 | ||
4ff65f77 MC |
1503 | /* This will set s->hit if we are resuming */ |
1504 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1505 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1506 | extensions, NULL, 0)) { |
f63a17d6 MC |
1507 | /* SSLfatal() already called */ |
1508 | goto err; | |
1509 | } | |
4ff65f77 | 1510 | } else { |
8c1a5343 | 1511 | /* |
4ff65f77 MC |
1512 | * Check if we can resume the session based on external pre-shared |
1513 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1514 | * Resumption based on server-side state works with session IDs. | |
1515 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1516 | * works by overriding the SessionTicket extension at the application | |
1517 | * layer, and does not send a session ID. (We do not know whether | |
1518 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1519 | * ID alone is not a reliable indicator of session resumption, so we | |
1520 | * first check if we can resume, and later peek at the next handshake | |
1521 | * message to see if the server wants to resume. | |
8c1a5343 | 1522 | */ |
4ff65f77 MC |
1523 | if (s->version >= TLS1_VERSION |
1524 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1525 | const SSL_CIPHER *pref_cipher = NULL; | |
1526 | /* | |
1527 | * s->session->master_key_length is a size_t, but this is an int for | |
1528 | * backwards compat reasons | |
1529 | */ | |
1530 | int master_key_length; | |
1531 | master_key_length = sizeof(s->session->master_key); | |
1532 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1533 | &master_key_length, | |
1534 | NULL, &pref_cipher, | |
1535 | s->ext.session_secret_cb_arg) | |
1536 | && master_key_length > 0) { | |
1537 | s->session->master_key_length = master_key_length; | |
1538 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1539 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1540 | } else { |
c48ffbcc | 1541 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1542 | goto err; |
4ff65f77 | 1543 | } |
0f113f3e | 1544 | } |
4ff65f77 MC |
1545 | |
1546 | if (session_id_len != 0 | |
1547 | && session_id_len == s->session->session_id_length | |
1548 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1549 | session_id_len) == 0) | |
1550 | s->hit = 1; | |
50932c4a MC |
1551 | } |
1552 | ||
4ff65f77 | 1553 | if (s->hit) { |
0f113f3e | 1554 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1555 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1556 | /* actually a client application bug */ |
f63a17d6 | 1557 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1558 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1559 | goto err; | |
0f113f3e | 1560 | } |
6e3d0153 | 1561 | } else { |
0f113f3e | 1562 | /* |
6e3d0153 | 1563 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1564 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1565 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1566 | * so the PAC-based session secret is always preserved. It'll be | |
1567 | * overwritten if the server refuses resumption. | |
0f113f3e | 1568 | */ |
c96ce52c | 1569 | if (s->session->session_id_length > 0) { |
9ef9088c | 1570 | tsan_counter(&s->session_ctx->stats.sess_miss); |
0f113f3e | 1571 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1572 | /* SSLfatal() already called */ |
1573 | goto err; | |
0f113f3e MC |
1574 | } |
1575 | } | |
50932c4a | 1576 | |
ccae4a15 | 1577 | s->session->ssl_version = s->version; |
a5816a5a MC |
1578 | /* |
1579 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1580 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1581 | * echo of what we originally sent in the ClientHello and should not be | |
1582 | * used for resumption. | |
1583 | */ | |
1584 | if (!SSL_IS_TLS13(s)) { | |
1585 | s->session->session_id_length = session_id_len; | |
1586 | /* session_id_len could be 0 */ | |
1587 | if (session_id_len > 0) | |
1588 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1589 | session_id_len); | |
1590 | } | |
0f113f3e | 1591 | } |
fc5ce51d | 1592 | |
ccae4a15 FI |
1593 | /* Session version and negotiated protocol version should match */ |
1594 | if (s->version != s->session->ssl_version) { | |
c48ffbcc | 1595 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
f63a17d6 MC |
1596 | SSL_R_SSL_SESSION_VERSION_MISMATCH); |
1597 | goto err; | |
ccae4a15 | 1598 | } |
0f113f3e | 1599 | /* |
3eb2aff4 KR |
1600 | * Now that we know the version, update the check to see if it's an allowed |
1601 | * version. | |
1602 | */ | |
555cbb32 TS |
1603 | s->s3.tmp.min_ver = s->version; |
1604 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1605 | |
11c67eea | 1606 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1607 | /* SSLfatal() already called */ |
1608 | goto err; | |
0f113f3e MC |
1609 | } |
1610 | ||
09b6c2ef | 1611 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1612 | if (compression != 0) { |
c48ffbcc | 1613 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1614 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1615 | goto err; | |
0f113f3e MC |
1616 | } |
1617 | /* | |
1618 | * If compression is disabled we'd better not try to resume a session | |
1619 | * using compression. | |
1620 | */ | |
1621 | if (s->session->compress_meth != 0) { | |
c48ffbcc | 1622 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_COMPRESSION); |
f63a17d6 | 1623 | goto err; |
0f113f3e | 1624 | } |
09b6c2ef | 1625 | #else |
fc5ce51d | 1626 | if (s->hit && compression != s->session->compress_meth) { |
c48ffbcc | 1627 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
dd5a4279 | 1628 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1629 | goto err; |
0f113f3e | 1630 | } |
fc5ce51d | 1631 | if (compression == 0) |
0f113f3e MC |
1632 | comp = NULL; |
1633 | else if (!ssl_allow_compression(s)) { | |
c48ffbcc | 1634 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COMPRESSION_DISABLED); |
f63a17d6 | 1635 | goto err; |
fc5ce51d EK |
1636 | } else { |
1637 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1638 | } | |
0f113f3e | 1639 | |
fc5ce51d | 1640 | if (compression != 0 && comp == NULL) { |
c48ffbcc | 1641 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1642 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1643 | goto err; | |
0f113f3e | 1644 | } else { |
555cbb32 | 1645 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1646 | } |
09b6c2ef | 1647 | #endif |
761772d7 | 1648 | |
f63a17d6 MC |
1649 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1650 | /* SSLfatal() already called */ | |
1651 | goto err; | |
1652 | } | |
332eb390 | 1653 | |
8723588e MC |
1654 | #ifndef OPENSSL_NO_SCTP |
1655 | if (SSL_IS_DTLS(s) && s->hit) { | |
1656 | unsigned char sctpauthkey[64]; | |
1657 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1658 | size_t labellen; |
8723588e MC |
1659 | |
1660 | /* | |
1661 | * Add new shared key for SCTP-Auth, will be ignored if | |
1662 | * no SCTP used. | |
1663 | */ | |
141eb8c6 MC |
1664 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1665 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1666 | |
09d62b33 MT |
1667 | /* Don't include the terminating zero. */ |
1668 | labellen = sizeof(labelbuffer) - 1; | |
1669 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1670 | labellen += 1; | |
1671 | ||
8723588e | 1672 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e EK |
1673 | sizeof(sctpauthkey), |
1674 | labelbuffer, | |
09d62b33 | 1675 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 1676 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1677 | goto err; |
1678 | } | |
8723588e MC |
1679 | |
1680 | BIO_ctrl(SSL_get_wbio(s), | |
1681 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1682 | sizeof(sctpauthkey), sctpauthkey); | |
1683 | } | |
1684 | #endif | |
1685 | ||
92760c21 MC |
1686 | /* |
1687 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1688 | * we're done with this message | |
1689 | */ | |
1690 | if (SSL_IS_TLS13(s) | |
1691 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1692 | || !s->method->ssl3_enc->change_cipher_state(s, |
1693 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1694 | /* SSLfatal() already called */ |
1695 | goto err; | |
92760c21 MC |
1696 | } |
1697 | ||
1b0286a3 | 1698 | OPENSSL_free(extensions); |
b9908bf9 | 1699 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1700 | err: |
1b0286a3 | 1701 | OPENSSL_free(extensions); |
b9908bf9 | 1702 | return MSG_PROCESS_ERROR; |
0f113f3e | 1703 | } |
d02b48c6 | 1704 | |
597c51bc MC |
1705 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, |
1706 | PACKET *extpkt) | |
3847d426 | 1707 | { |
3847d426 | 1708 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1709 | |
d4504fe5 MC |
1710 | /* |
1711 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1712 | * should not be used. | |
1713 | */ | |
1714 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1715 | s->enc_write_ctx = NULL; | |
1716 | ||
597c51bc | 1717 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1718 | &extensions, NULL, 1) |
fe874d27 | 1719 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1720 | extensions, NULL, 0, 1)) { |
1721 | /* SSLfatal() already called */ | |
1722 | goto err; | |
1723 | } | |
3847d426 MC |
1724 | |
1725 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1726 | extensions = NULL; |
1727 | ||
5b64ce89 | 1728 | if (s->ext.tls13_cookie_len == 0 && s->s3.tmp.pkey != NULL) { |
66d4bf6b MC |
1729 | /* |
1730 | * We didn't receive a cookie or a new key_share so the next | |
1731 | * ClientHello will not change | |
1732 | */ | |
c48ffbcc | 1733 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CHANGE_FOLLOWING_HRR); |
f63a17d6 | 1734 | goto err; |
66d4bf6b | 1735 | } |
3847d426 | 1736 | |
11c67eea MC |
1737 | /* |
1738 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1739 | * a synthetic message_hash in place of ClientHello1. | |
1740 | */ | |
43054d3d | 1741 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1742 | /* SSLfatal() already called */ |
1743 | goto err; | |
11c67eea MC |
1744 | } |
1745 | ||
1746 | /* | |
1747 | * Add this message to the Transcript Hash. Normally this is done | |
1748 | * automatically prior to the message processing stage. However due to the | |
1749 | * need to create the synthetic message hash, we defer that step until now | |
1750 | * for HRR messages. | |
1751 | */ | |
1752 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1753 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1754 | /* SSLfatal() already called */ |
1755 | goto err; | |
11c67eea MC |
1756 | } |
1757 | ||
3847d426 | 1758 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1759 | err: |
3847d426 MC |
1760 | OPENSSL_free(extensions); |
1761 | return MSG_PROCESS_ERROR; | |
1762 | } | |
1763 | ||
0c3eb279 | 1764 | /* prepare server cert verificaton by setting s->session->peer_chain from pkt */ |
be3583fa | 1765 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1766 | { |
b9908bf9 MC |
1767 | unsigned long cert_list_len, cert_len; |
1768 | X509 *x = NULL; | |
b6981744 | 1769 | const unsigned char *certstart, *certbytes; |
0c3eb279 | 1770 | size_t chainidx; |
e96e0f8e | 1771 | unsigned int context = 0; |
0f113f3e | 1772 | |
0c3eb279 | 1773 | if ((s->session->peer_chain = sk_X509_new_null()) == NULL) { |
c48ffbcc | 1774 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1775 | goto err; |
0f113f3e MC |
1776 | } |
1777 | ||
e96e0f8e MC |
1778 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1779 | || context != 0 | |
1780 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1781 | || PACKET_remaining(pkt) != cert_list_len |
1782 | || PACKET_remaining(pkt) == 0) { | |
c48ffbcc | 1783 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1784 | goto err; |
0f113f3e | 1785 | } |
d805a57b | 1786 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1787 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1788 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
c48ffbcc | 1789 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1790 | goto err; |
0f113f3e MC |
1791 | } |
1792 | ||
df758a85 | 1793 | certstart = certbytes; |
d8652be0 | 1794 | x = X509_new_ex(s->ctx->libctx, s->ctx->propq); |
0f113f3e | 1795 | if (x == NULL) { |
c48ffbcc | 1796 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_MALLOC_FAILURE); |
6849b73c | 1797 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
6725682d SL |
1798 | goto err; |
1799 | } | |
1800 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
1801 | cert_len) == NULL) { | |
c48ffbcc | 1802 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, ERR_R_ASN1_LIB); |
f63a17d6 | 1803 | goto err; |
0f113f3e | 1804 | } |
6725682d | 1805 | |
df758a85 | 1806 | if (certbytes != (certstart + cert_len)) { |
c48ffbcc | 1807 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1808 | goto err; |
0f113f3e | 1809 | } |
e96e0f8e MC |
1810 | |
1811 | if (SSL_IS_TLS13(s)) { | |
1812 | RAW_EXTENSION *rawexts = NULL; | |
1813 | PACKET extensions; | |
1814 | ||
1815 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 1816 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1817 | goto err; |
e96e0f8e | 1818 | } |
fe874d27 MC |
1819 | if (!tls_collect_extensions(s, &extensions, |
1820 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1821 | NULL, chainidx == 0) |
8e1634ec | 1822 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1823 | rawexts, x, chainidx, |
8e1634ec | 1824 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1825 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1826 | /* SSLfatal already called */ |
1827 | goto err; | |
5ee289ea MC |
1828 | } |
1829 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1830 | } |
1831 | ||
0c3eb279 | 1832 | if (!sk_X509_push(s->session->peer_chain, x)) { |
c48ffbcc | 1833 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1834 | goto err; |
0f113f3e MC |
1835 | } |
1836 | x = NULL; | |
0f113f3e | 1837 | } |
0c3eb279 DDO |
1838 | return MSG_PROCESS_CONTINUE_PROCESSING; |
1839 | ||
1840 | err: | |
1841 | X509_free(x); | |
1842 | sk_X509_pop_free(s->session->peer_chain, X509_free); | |
1843 | s->session->peer_chain = NULL; | |
1844 | return MSG_PROCESS_ERROR; | |
1845 | } | |
0f113f3e | 1846 | |
0c3eb279 DDO |
1847 | /* |
1848 | * Verify the s->session->peer_chain and check server cert type. | |
1849 | * On success set s->session->peer and s->session->verify_result. | |
1850 | * Else the peer certificate verification callback may request retry. | |
1851 | */ | |
1852 | WORK_STATE tls_post_process_server_certificate(SSL *s, WORK_STATE wst) | |
1853 | { | |
1854 | X509 *x; | |
1855 | EVP_PKEY *pkey = NULL; | |
1856 | const SSL_CERT_LOOKUP *clu; | |
1857 | size_t certidx; | |
1858 | int i; | |
1859 | ||
1860 | i = ssl_verify_cert_chain(s, s->session->peer_chain); | |
1861 | if (i == -1) { | |
1862 | s->rwstate = SSL_RETRY_VERIFY; | |
1863 | return WORK_MORE_A; | |
1864 | } | |
c8e2f98c MC |
1865 | /* |
1866 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1867 | * for client side verification of the server certificate to take place. | |
1868 | * However, historically the code has only checked that *any* flag is set | |
1869 | * to cause server verification to take place. Use of the other flags makes | |
1870 | * no sense in client mode. An attempt to clean up the semantics was | |
1871 | * reverted because at least one application *only* set | |
1872 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1873 | * server verification to take place, after the clean up it silently did | |
1874 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1875 | * sent to them because they are void functions. Therefore, we now use the | |
1876 | * (less clean) historic behaviour of performing validation if any flag is | |
1877 | * set. The *documented* interface remains the same. | |
1878 | */ | |
1879 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
c6d38183 | 1880 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 | 1881 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
0c3eb279 | 1882 | return WORK_ERROR; |
0f113f3e MC |
1883 | } |
1884 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1885 | if (i > 1) { | |
c48ffbcc | 1886 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, i); |
0c3eb279 | 1887 | return WORK_ERROR; |
0f113f3e MC |
1888 | } |
1889 | ||
0f113f3e MC |
1890 | /* |
1891 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1892 | * which we don't include in statem_srvr.c |
0f113f3e | 1893 | */ |
0c3eb279 | 1894 | x = sk_X509_value(s->session->peer_chain, 0); |
0f113f3e | 1895 | |
8382fd3a | 1896 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1897 | |
55a9a16f | 1898 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
c48ffbcc | 1899 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 1900 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
0c3eb279 | 1901 | return WORK_ERROR; |
0f113f3e MC |
1902 | } |
1903 | ||
7f6b466b | 1904 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
c48ffbcc | 1905 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
0c3eb279 | 1906 | return WORK_ERROR; |
0f113f3e | 1907 | } |
05b8486e DSH |
1908 | /* |
1909 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1910 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1911 | * type. | |
1912 | */ | |
1913 | if (!SSL_IS_TLS13(s)) { | |
555cbb32 | 1914 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
c48ffbcc | 1915 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CERTIFICATE_TYPE); |
0c3eb279 | 1916 | return WORK_ERROR; |
05b8486e | 1917 | } |
0f113f3e | 1918 | } |
55a9a16f MC |
1919 | |
1920 | X509_free(s->session->peer); | |
05f0fb9f | 1921 | X509_up_ref(x); |
55a9a16f | 1922 | s->session->peer = x; |
0f113f3e | 1923 | s->session->verify_result = s->verify_result; |
2c5dfdc3 MC |
1924 | |
1925 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1926 | if (SSL_IS_TLS13(s) | |
1927 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1928 | sizeof(s->cert_verify_hash), | |
1929 | &s->cert_verify_hash_len)) { | |
f63a17d6 | 1930 | /* SSLfatal() already called */; |
0c3eb279 | 1931 | return WORK_ERROR; |
2c5dfdc3 | 1932 | } |
0c3eb279 | 1933 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 1934 | } |
d02b48c6 | 1935 | |
a2c2e000 | 1936 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
1937 | { |
1938 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1939 | PACKET psk_identity_hint; |
02a74590 | 1940 | |
7dc1c647 MC |
1941 | /* PSK ciphersuites are preceded by an identity hint */ |
1942 | ||
1943 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
c48ffbcc | 1944 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1945 | return 0; |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * Store PSK identity hint for later use, hint is used in | |
1950 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1951 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1952 | * identity. | |
1953 | */ | |
1954 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 1955 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1956 | return 0; |
1957 | } | |
02a74590 | 1958 | |
7dc1c647 MC |
1959 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1960 | OPENSSL_free(s->session->psk_identity_hint); | |
1961 | s->session->psk_identity_hint = NULL; | |
1962 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1963 | &s->session->psk_identity_hint)) { |
c48ffbcc | 1964 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1965 | return 0; |
1966 | } | |
1967 | ||
1968 | return 1; | |
1969 | #else | |
c48ffbcc | 1970 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 | 1971 | return 0; |
02a74590 MC |
1972 | #endif |
1973 | } | |
1974 | ||
a2c2e000 | 1975 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
1976 | { |
1977 | #ifndef OPENSSL_NO_SRP | |
1978 | PACKET prime, generator, salt, server_pub; | |
1979 | ||
1980 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1981 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1982 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1983 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
c48ffbcc | 1984 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1985 | return 0; |
1986 | } | |
1987 | ||
348240c6 | 1988 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1989 | if ((s->srp_ctx.N = |
1990 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1991 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1992 | || (s->srp_ctx.g = |
1993 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1994 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1995 | || (s->srp_ctx.s = |
1996 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1997 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1998 | || (s->srp_ctx.B = |
1999 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2000 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
c48ffbcc | 2001 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
25c6c10c MC |
2002 | return 0; |
2003 | } | |
2004 | ||
a2c2e000 MC |
2005 | if (!srp_verify_server_param(s)) { |
2006 | /* SSLfatal() already called */ | |
25c6c10c MC |
2007 | return 0; |
2008 | } | |
2009 | ||
2010 | /* We must check if there is a certificate */ | |
555cbb32 | 2011 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2012 | *pkey = X509_get0_pubkey(s->session->peer); |
2013 | ||
2014 | return 1; | |
2015 | #else | |
c48ffbcc | 2016 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
2017 | return 0; |
2018 | #endif | |
2019 | } | |
2020 | ||
a2c2e000 | 2021 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d | 2022 | { |
e01a610d MC |
2023 | PACKET prime, generator, pub_key; |
2024 | EVP_PKEY *peer_tmp = NULL; | |
e01a610d | 2025 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; |
1ee22dc2 MC |
2026 | EVP_PKEY_CTX *pctx = NULL; |
2027 | OSSL_PARAM *params = NULL; | |
2028 | OSSL_PARAM_BLD *tmpl = NULL; | |
2029 | int ret = 0; | |
26505153 | 2030 | |
e01a610d MC |
2031 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2032 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2033 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
c48ffbcc | 2034 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
2035 | return 0; |
2036 | } | |
2037 | ||
348240c6 MC |
2038 | /* TODO(size_t): Convert these calls */ |
2039 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2040 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2041 | NULL); | |
2042 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2043 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2044 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
c48ffbcc | 2045 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
e01a610d MC |
2046 | goto err; |
2047 | } | |
2048 | ||
1ee22dc2 MC |
2049 | tmpl = OSSL_PARAM_BLD_new(); |
2050 | if (tmpl == NULL | |
2051 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2052 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g) | |
2053 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, | |
2054 | bnpub_key) | |
2055 | || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { | |
2056 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2057 | goto err; |
2058 | } | |
e01a610d | 2059 | |
1ee22dc2 MC |
2060 | pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "DH", s->ctx->propq); |
2061 | if (pctx == NULL) { | |
2062 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
26505153 RL |
2063 | goto err; |
2064 | } | |
2db985b7 SL |
2065 | if (EVP_PKEY_fromdata_init(pctx) <= 0 |
2066 | || EVP_PKEY_fromdata(pctx, &peer_tmp, EVP_PKEY_KEYPAIR, params) <= 0) { | |
1ee22dc2 | 2067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
2068 | goto err; |
2069 | } | |
e01a610d | 2070 | |
1ee22dc2 MC |
2071 | EVP_PKEY_CTX_free(pctx); |
2072 | pctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, peer_tmp, s->ctx->propq); | |
2073 | if (pctx == NULL | |
899e2564 MC |
2074 | /* |
2075 | * EVP_PKEY_param_check() will verify that the DH params are using | |
2076 | * a safe prime. In this context, because we're using ephemeral DH, | |
2077 | * we're ok with it not being a safe prime. | |
2078 | * EVP_PKEY_param_check_quick() skips the safe prime check. | |
2079 | */ | |
2080 | || EVP_PKEY_param_check_quick(pctx) != 1 | |
1ee22dc2 MC |
2081 | || EVP_PKEY_public_check(pctx) != 1) { |
2082 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2083 | goto err; |
2084 | } | |
2085 | ||
ada66e78 | 2086 | if (!ssl_security(s, SSL_SECOP_TMP_DH, EVP_PKEY_security_bits(peer_tmp), |
47e81a1b | 2087 | 0, peer_tmp)) { |
c48ffbcc | 2088 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DH_KEY_TOO_SMALL); |
ada66e78 P |
2089 | goto err; |
2090 | } | |
2091 | ||
555cbb32 | 2092 | s->s3.peer_tmp = peer_tmp; |
1ee22dc2 | 2093 | peer_tmp = NULL; |
e01a610d MC |
2094 | |
2095 | /* | |
2096 | * FIXME: This makes assumptions about which ciphersuites come with | |
2097 | * public keys. We should have a less ad-hoc way of doing this | |
2098 | */ | |
555cbb32 | 2099 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2100 | *pkey = X509_get0_pubkey(s->session->peer); |
2101 | /* else anonymous DH, so no certificate or pkey. */ | |
2102 | ||
1ee22dc2 | 2103 | ret = 1; |
e01a610d MC |
2104 | |
2105 | err: | |
1ee22dc2 MC |
2106 | OSSL_PARAM_BLD_free(tmpl); |
2107 | OSSL_PARAM_BLD_free_params(params); | |
2108 | EVP_PKEY_free(peer_tmp); | |
2109 | EVP_PKEY_CTX_free(pctx); | |
e01a610d MC |
2110 | BN_free(p); |
2111 | BN_free(g); | |
2112 | BN_free(bnpub_key); | |
e01a610d | 2113 | |
1ee22dc2 | 2114 | return ret; |
e01a610d MC |
2115 | } |
2116 | ||
a2c2e000 | 2117 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 | 2118 | { |
ff74aeb1 | 2119 | PACKET encoded_pt; |
6447e818 | 2120 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2121 | |
2122 | /* | |
2123 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2124 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2125 | * ECParameters in this case is just three bytes. |
2126 | */ | |
6447e818 | 2127 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
c48ffbcc | 2128 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2129 | return 0; |
2130 | } | |
2131 | /* | |
6447e818 DSH |
2132 | * Check curve is named curve type and one of our preferences, if not |
2133 | * server has sent an invalid curve. | |
ff74aeb1 | 2134 | */ |
dcf8b01f MC |
2135 | if (curve_type != NAMED_CURVE_TYPE |
2136 | || !tls1_check_group_id(s, curve_id, 1)) { | |
c48ffbcc | 2137 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2138 | return 0; |
2139 | } | |
2140 | ||
ada66e78 | 2141 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
c48ffbcc | 2142 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a2c2e000 | 2143 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
ff74aeb1 MC |
2144 | return 0; |
2145 | } | |
2146 | ||
ff74aeb1 | 2147 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
c48ffbcc | 2148 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2149 | return 0; |
2150 | } | |
2151 | ||
5ac8fb58 MC |
2152 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
2153 | PACKET_data(&encoded_pt), | |
2154 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 2155 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2156 | return 0; |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2161 | * ECParameters in the server key exchange message. We do support RSA | |
2162 | * and ECDSA. | |
2163 | */ | |
555cbb32 | 2164 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
ff74aeb1 | 2165 | *pkey = X509_get0_pubkey(s->session->peer); |
555cbb32 | 2166 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
ff74aeb1 MC |
2167 | *pkey = X509_get0_pubkey(s->session->peer); |
2168 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2169 | ||
2170 | return 1; | |
ff74aeb1 MC |
2171 | } |
2172 | ||
be3583fa | 2173 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2174 | { |
e1e588ac | 2175 | long alg_k; |
b9908bf9 | 2176 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2177 | EVP_MD_CTX *md_ctx = NULL; |
2178 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2179 | PACKET save_param_start, signature; |
b9908bf9 | 2180 | |
555cbb32 | 2181 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2182 | |
73999b62 | 2183 | save_param_start = *pkt; |
8d92c1f8 | 2184 | |
555cbb32 TS |
2185 | EVP_PKEY_free(s->s3.peer_tmp); |
2186 | s->s3.peer_tmp = NULL; | |
d02b48c6 | 2187 | |
7689082b | 2188 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2189 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2190 | /* SSLfatal() already called */ | |
7dc1c647 | 2191 | goto err; |
a2c2e000 | 2192 | } |
7689082b DSH |
2193 | } |
2194 | ||
2195 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2196 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2197 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2198 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2199 | /* SSLfatal() already called */ | |
0f113f3e | 2200 | goto err; |
a2c2e000 | 2201 | } |
e01a610d | 2202 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2203 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2204 | /* SSLfatal() already called */ | |
e01a610d | 2205 | goto err; |
a2c2e000 | 2206 | } |
ff74aeb1 | 2207 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2208 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2209 | /* SSLfatal() already called */ | |
ff74aeb1 | 2210 | goto err; |
a2c2e000 | 2211 | } |
0f113f3e | 2212 | } else if (alg_k) { |
c48ffbcc | 2213 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2214 | goto err; |
0f113f3e | 2215 | } |
0f113f3e | 2216 | |
0f113f3e MC |
2217 | /* if it was signed, check the signature */ |
2218 | if (pkey != NULL) { | |
32942870 | 2219 | PACKET params; |
be8dba2c | 2220 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2221 | unsigned char *tbs; |
2222 | size_t tbslen; | |
2223 | int rv; | |
e1e588ac | 2224 | |
32942870 EK |
2225 | /* |
2226 | * |pkt| now points to the beginning of the signature, so the difference | |
2227 | * equals the length of the parameters. | |
2228 | */ | |
2229 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2230 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2231 | PACKET_remaining(pkt))) { |
c48ffbcc | 2232 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2233 | goto err; |
32942870 EK |
2234 | } |
2235 | ||
0f113f3e | 2236 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2237 | unsigned int sigalg; |
703bcee0 MC |
2238 | |
2239 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
c48ffbcc | 2240 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2241 | goto err; |
0f113f3e | 2242 | } |
f63a17d6 MC |
2243 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2244 | /* SSLfatal() already called */ | |
0f113f3e | 2245 | goto err; |
0f113f3e | 2246 | } |
f365a3e2 | 2247 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
c48ffbcc | 2248 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f365a3e2 | 2249 | goto err; |
32942870 | 2250 | } |
0f113f3e | 2251 | |
c8f6c28a | 2252 | if (!tls1_lookup_md(s->ctx, s->s3.tmp.peer_sigalg, &md)) { |
c48ffbcc | 2253 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
7cd1420b | 2254 | SSL_R_NO_SUITABLE_DIGEST_ALGORITHM); |
b2021556 DSH |
2255 | goto err; |
2256 | } | |
44f23cd2 | 2257 | if (SSL_USE_SIGALGS(s)) |
49b26f54 RL |
2258 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
2259 | md == NULL ? "n/a" : EVP_MD_name(md)); | |
f365a3e2 | 2260 | |
73999b62 MC |
2261 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2262 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2263 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2264 | goto err; |
0f113f3e | 2265 | } |
e1e588ac MC |
2266 | |
2267 | md_ctx = EVP_MD_CTX_new(); | |
2268 | if (md_ctx == NULL) { | |
c48ffbcc | 2269 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
e1e588ac | 2270 | goto err; |
0f113f3e | 2271 | } |
e1e588ac | 2272 | |
d8652be0 MC |
2273 | if (EVP_DigestVerifyInit_ex(md_ctx, &pctx, |
2274 | md == NULL ? NULL : EVP_MD_name(md), | |
d38b6ae9 P |
2275 | s->ctx->libctx, s->ctx->propq, pkey, |
2276 | NULL) <= 0) { | |
c48ffbcc | 2277 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2278 | goto err; |
2279 | } | |
5554facb | 2280 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2281 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2282 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2283 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
c48ffbcc | 2284 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2285 | goto err; |
2286 | } | |
2287 | } | |
72ceb6a6 DSH |
2288 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2289 | PACKET_remaining(¶ms)); | |
2290 | if (tbslen == 0) { | |
f63a17d6 | 2291 | /* SSLfatal() already called */ |
e1e588ac | 2292 | goto err; |
192e4bbb | 2293 | } |
72ceb6a6 DSH |
2294 | |
2295 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2296 | PACKET_remaining(&signature), tbs, tbslen); | |
2297 | OPENSSL_free(tbs); | |
cfba0675 | 2298 | if (rv <= 0) { |
c48ffbcc | 2299 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE); |
e1e588ac | 2300 | goto err; |
0f113f3e | 2301 | } |
e1e588ac | 2302 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2303 | md_ctx = NULL; |
0f113f3e | 2304 | } else { |
7689082b | 2305 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2306 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2307 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2308 | /* Might be wrong key type, check it */ |
e1e588ac | 2309 | if (ssl3_check_cert_and_algorithm(s)) { |
c48ffbcc | 2310 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_DATA); |
e1e588ac | 2311 | } |
a2c2e000 | 2312 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2313 | goto err; |
2314 | } | |
2315 | /* still data left over */ | |
73999b62 | 2316 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2317 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2318 | goto err; |
0f113f3e MC |
2319 | } |
2320 | } | |
e1e588ac | 2321 | |
b9908bf9 | 2322 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2323 | err: |
fe3066ee | 2324 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2325 | return MSG_PROCESS_ERROR; |
0f113f3e | 2326 | } |
d02b48c6 | 2327 | |
be3583fa | 2328 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2329 | { |
32f66107 DSH |
2330 | size_t i; |
2331 | ||
2332 | /* Clear certificate validity flags */ | |
2333 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 2334 | s->s3.tmp.valid_flags[i] = 0; |
0f113f3e | 2335 | |
03f44b97 | 2336 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2337 | PACKET reqctx, extensions; |
2338 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2339 | |
1bf4cb0f MC |
2340 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2341 | /* | |
2342 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2343 | * post-handshake messages. We can't reasonably respond to this, so | |
2344 | * we just ignore it | |
2345 | */ | |
2346 | return MSG_PROCESS_FINISHED_READING; | |
2347 | } | |
2348 | ||
03f44b97 | 2349 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2350 | OPENSSL_free(s->s3.tmp.ctype); |
2351 | s->s3.tmp.ctype = NULL; | |
2352 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2353 | OPENSSL_free(s->pha_context); |
2354 | s->pha_context = NULL; | |
32f66107 | 2355 | |
9d75dce3 TS |
2356 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2357 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
c48ffbcc | 2358 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2359 | return MSG_PROCESS_ERROR; |
03f44b97 | 2360 | } |
32f66107 DSH |
2361 | |
2362 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2363 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2364 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2365 | } |
2366 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2367 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2368 | &rawexts, NULL, 1) |
fe874d27 | 2369 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2370 | rawexts, NULL, 0, 1)) { |
2371 | /* SSLfatal() already called */ | |
32f66107 | 2372 | OPENSSL_free(rawexts); |
f63a17d6 | 2373 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2374 | } |
2375 | OPENSSL_free(rawexts); | |
2376 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2377 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2378 | return MSG_PROCESS_ERROR; |
32f66107 | 2379 | } |
03f44b97 DSH |
2380 | } else { |
2381 | PACKET ctypes; | |
75c13e78 | 2382 | |
03f44b97 DSH |
2383 | /* get the certificate types */ |
2384 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
c48ffbcc | 2385 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2386 | return MSG_PROCESS_ERROR; |
03f44b97 DSH |
2387 | } |
2388 | ||
555cbb32 | 2389 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
c48ffbcc | 2390 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 2391 | return MSG_PROCESS_ERROR; |
03f44b97 | 2392 | } |
ac112332 | 2393 | |
32f66107 DSH |
2394 | if (SSL_USE_SIGALGS(s)) { |
2395 | PACKET sigalgs; | |
703bcee0 | 2396 | |
32f66107 | 2397 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
c48ffbcc | 2398 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2399 | return MSG_PROCESS_ERROR; |
32f66107 | 2400 | } |
ac112332 | 2401 | |
c589c34e BK |
2402 | /* |
2403 | * Despite this being for certificates, preserve compatibility | |
2404 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2405 | */ | |
2406 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 | 2407 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 MC |
2408 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2409 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2410 | } |
2411 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2412 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
f63a17d6 | 2413 | return MSG_PROCESS_ERROR; |
32f66107 | 2414 | } |
0f113f3e | 2415 | } |
0f113f3e | 2416 | |
32f66107 | 2417 | /* get the CA RDNs */ |
f63a17d6 MC |
2418 | if (!parse_ca_names(s, pkt)) { |
2419 | /* SSLfatal() already called */ | |
2420 | return MSG_PROCESS_ERROR; | |
2421 | } | |
03f44b97 DSH |
2422 | } |
2423 | ||
2424 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2425 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2426 | return MSG_PROCESS_ERROR; |
03f44b97 | 2427 | } |
0f113f3e | 2428 | |
0f113f3e | 2429 | /* we should setup a certificate to return.... */ |
555cbb32 | 2430 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2431 | |
e4562014 MC |
2432 | /* |
2433 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2434 | * after the CertificateVerify message has been received. This is because | |
2435 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2436 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2437 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2438 | * client_cert_cb. |
2439 | */ | |
2440 | if (SSL_IS_TLS13(s) && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
2441 | return MSG_PROCESS_CONTINUE_READING; | |
2442 | ||
f63a17d6 | 2443 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2444 | } |
2445 | ||
be3583fa | 2446 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2447 | { |
b9908bf9 | 2448 | unsigned int ticklen; |
9ac6244b | 2449 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2450 | unsigned int sess_len; |
de1df7e9 | 2451 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2452 | PACKET nonce; |
abd86cec | 2453 | EVP_MD *sha256 = NULL; |
b9908bf9 | 2454 | |
6cf2dbd9 MC |
2455 | PACKET_null_init(&nonce); |
2456 | ||
73999b62 | 2457 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2458 | || (SSL_IS_TLS13(s) |
2459 | && (!PACKET_get_net_4(pkt, &age_add) | |
6cf2dbd9 | 2460 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2461 | || !PACKET_get_net_2(pkt, &ticklen) |
10bda8f8 MC |
2462 | || (SSL_IS_TLS13(s) ? (ticklen == 0 || PACKET_remaining(pkt) < ticklen) |
2463 | : PACKET_remaining(pkt) != ticklen)) { | |
c48ffbcc | 2464 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2465 | goto err; |
e711da71 EK |
2466 | } |
2467 | ||
de1df7e9 MC |
2468 | /* |
2469 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2470 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2471 | * be 0 here in that instance | |
2472 | */ | |
e711da71 | 2473 | if (ticklen == 0) |
c9de4a20 | 2474 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2475 | |
150840b9 MC |
2476 | /* |
2477 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2478 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2479 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2480 | * time a NewSessionTicket arrives because those messages arrive | |
2481 | * post-handshake and the session may have already gone into the session | |
2482 | * cache. | |
2483 | */ | |
2484 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee | 2485 | SSL_SESSION *new_sess; |
1f156321 | 2486 | |
98ece4ee MC |
2487 | /* |
2488 | * We reused an existing session, so we need to replace it with a new | |
2489 | * one | |
2490 | */ | |
5d61491c | 2491 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
c48ffbcc | 2492 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
f63a17d6 | 2493 | goto err; |
5d61491c MC |
2494 | } |
2495 | ||
1f156321 MC |
2496 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
2497 | && !SSL_IS_TLS13(s)) { | |
2498 | /* | |
2499 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2500 | * any old ticket we were using is now out of date, so we remove the | |
2501 | * old session from the cache. We carry on if this fails | |
2502 | */ | |
2503 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2504 | } | |
2505 | ||
98ece4ee MC |
2506 | SSL_SESSION_free(s->session); |
2507 | s->session = new_sess; | |
2508 | } | |
2509 | ||
fc24f0bf MC |
2510 | /* |
2511 | * Technically the cast to long here is not guaranteed by the C standard - | |
2512 | * but we use it elsewhere, so this should be ok. | |
2513 | */ | |
2514 | s->session->time = (long)time(NULL); | |
2515 | ||
aff8c126 RS |
2516 | OPENSSL_free(s->session->ext.tick); |
2517 | s->session->ext.tick = NULL; | |
2518 | s->session->ext.ticklen = 0; | |
e711da71 | 2519 | |
aff8c126 RS |
2520 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2521 | if (s->session->ext.tick == NULL) { | |
c48ffbcc | 2522 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2523 | goto err; |
2524 | } | |
aff8c126 | 2525 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 2526 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2527 | goto err; |
561e12bb | 2528 | } |
e711da71 | 2529 | |
aff8c126 | 2530 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2531 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2532 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2533 | |
2534 | if (SSL_IS_TLS13(s)) { | |
2535 | PACKET extpkt; | |
2536 | ||
2537 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 | 2538 | || PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2539 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
1cde0259 MC |
2540 | goto err; |
2541 | } | |
2542 | ||
2543 | if (!tls_collect_extensions(s, &extpkt, | |
2544 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2545 | NULL, 1) | |
fe874d27 MC |
2546 | || !tls_parse_all_extensions(s, |
2547 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2548 | exts, NULL, 0, 1)) { |
2549 | /* SSLfatal() already called */ | |
2550 | goto err; | |
de1df7e9 MC |
2551 | } |
2552 | } | |
2553 | ||
0f113f3e MC |
2554 | /* |
2555 | * There are two ways to detect a resumed ticket session. One is to set | |
2556 | * an appropriate session ID and then the server must return a match in | |
2557 | * ServerHello. This allows the normal client session ID matching to work | |
2558 | * and we know much earlier that the ticket has been accepted. The | |
2559 | * other way is to set zero length session ID when the ticket is | |
2560 | * presented and rely on the handshake to determine session resumption. | |
2561 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2562 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2563 | * ticket. | |
0f113f3e | 2564 | */ |
abd86cec MC |
2565 | sha256 = EVP_MD_fetch(s->ctx->libctx, "SHA2-256", s->ctx->propq); |
2566 | if (sha256 == NULL) { | |
5a2d0ef3 RL |
2567 | /* Error is already recorded */ |
2568 | SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR); | |
abd86cec MC |
2569 | goto err; |
2570 | } | |
ec60ccc1 MC |
2571 | /* |
2572 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2573 | * but s->session->session_id_length is a size_t | |
2574 | */ | |
aff8c126 | 2575 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2576 | s->session->session_id, &sess_len, |
abd86cec | 2577 | sha256, NULL)) { |
c48ffbcc | 2578 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
d166ed8c DSH |
2579 | goto err; |
2580 | } | |
abd86cec MC |
2581 | EVP_MD_free(sha256); |
2582 | sha256 = NULL; | |
ec60ccc1 | 2583 | s->session->session_id_length = sess_len; |
4cb00457 | 2584 | s->session->not_resumable = 0; |
de1df7e9 MC |
2585 | |
2586 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2587 | if (SSL_IS_TLS13(s)) { | |
4ff1a526 MC |
2588 | const EVP_MD *md = ssl_handshake_md(s); |
2589 | int hashleni = EVP_MD_size(md); | |
2590 | size_t hashlen; | |
2591 | static const unsigned char nonce_label[] = "resumption"; | |
2592 | ||
2593 | /* Ensure cast to size_t is safe */ | |
2594 | if (!ossl_assert(hashleni >= 0)) { | |
c48ffbcc | 2595 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff1a526 MC |
2596 | goto err; |
2597 | } | |
2598 | hashlen = (size_t)hashleni; | |
2599 | ||
2600 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2601 | nonce_label, | |
2602 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2603 | PACKET_data(&nonce), |
2604 | PACKET_remaining(&nonce), | |
4ff1a526 | 2605 | s->session->master_key, |
0fb2815b | 2606 | hashlen, 1)) { |
4ff1a526 MC |
2607 | /* SSLfatal() already called */ |
2608 | goto err; | |
2609 | } | |
2610 | s->session->master_key_length = hashlen; | |
2611 | ||
33d93417 | 2612 | OPENSSL_free(exts); |
de1df7e9 MC |
2613 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2614 | return MSG_PROCESS_FINISHED_READING; | |
2615 | } | |
2616 | ||
b9908bf9 | 2617 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2618 | err: |
abd86cec | 2619 | EVP_MD_free(sha256); |
33d93417 | 2620 | OPENSSL_free(exts); |
b9908bf9 | 2621 | return MSG_PROCESS_ERROR; |
0f113f3e | 2622 | } |
67c8e7f4 | 2623 | |
f63e4288 MC |
2624 | /* |
2625 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2626 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2627 | */ |
f63a17d6 | 2628 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2629 | { |
8b0e934a | 2630 | size_t resplen; |
b9908bf9 | 2631 | unsigned int type; |
b9908bf9 | 2632 | |
73999b62 | 2633 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2634 | || type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 2635 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_UNSUPPORTED_STATUS_TYPE); |
f63e4288 | 2636 | return 0; |
0f113f3e | 2637 | } |
56a26ce3 MC |
2638 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2639 | || PACKET_remaining(pkt) != resplen) { | |
c48ffbcc | 2640 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2641 | return 0; |
0f113f3e | 2642 | } |
8cbfcc70 RS |
2643 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2644 | if (s->ext.ocsp.resp == NULL) { | |
c48ffbcc | 2645 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
f63e4288 | 2646 | return 0; |
0f113f3e | 2647 | } |
8cbfcc70 | 2648 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
c48ffbcc | 2649 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2650 | return 0; |
ac63710a | 2651 | } |
8cbfcc70 | 2652 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2653 | |
2654 | return 1; | |
2655 | } | |
2faa1b48 | 2656 | |
f63e4288 MC |
2657 | |
2658 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2659 | { | |
f63a17d6 MC |
2660 | if (!tls_process_cert_status_body(s, pkt)) { |
2661 | /* SSLfatal() already called */ | |
f63e4288 MC |
2662 | return MSG_PROCESS_ERROR; |
2663 | } | |
2664 | ||
b9908bf9 | 2665 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2666 | } |
d02b48c6 | 2667 | |
7776a36c MC |
2668 | /* |
2669 | * Perform miscellaneous checks and processing after we have received the | |
2670 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2671 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2672 | * on failure. | |
7776a36c | 2673 | */ |
f63a17d6 | 2674 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2675 | { |
a455d0f6 MC |
2676 | /* |
2677 | * at this point we check that we have the required stuff from | |
2678 | * the server | |
2679 | */ | |
2680 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2681 | /* SSLfatal() already called */ |
7776a36c | 2682 | return 0; |
a455d0f6 MC |
2683 | } |
2684 | ||
bb1aaab4 | 2685 | /* |
aff8c126 RS |
2686 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2687 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2688 | * message, or NULL and -1 otherwise |
2689 | */ | |
aff8c126 RS |
2690 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2691 | && s->ctx->ext.status_cb != NULL) { | |
2692 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2693 | ||
bb1aaab4 | 2694 | if (ret == 0) { |
f63a17d6 | 2695 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
f63a17d6 | 2696 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2697 | return 0; |
bb1aaab4 MC |
2698 | } |
2699 | if (ret < 0) { | |
c48ffbcc | 2700 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
7776a36c | 2701 | return 0; |
bb1aaab4 MC |
2702 | } |
2703 | } | |
ed29e82a RP |
2704 | #ifndef OPENSSL_NO_CT |
2705 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2706 | /* Note we validate the SCTs whether or not we abort on error */ |
2707 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2708 | /* SSLfatal() already called */ |
7776a36c | 2709 | return 0; |
ed29e82a RP |
2710 | } |
2711 | } | |
2712 | #endif | |
2713 | ||
7776a36c MC |
2714 | return 1; |
2715 | } | |
2716 | ||
2717 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2718 | { | |
7776a36c MC |
2719 | if (PACKET_remaining(pkt) > 0) { |
2720 | /* should contain no data */ | |
c48ffbcc | 2721 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2722 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2723 | } |
2724 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2725 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
76cb077f | 2726 | if (ssl_srp_calc_a_param_intern(s) <= 0) { |
c48ffbcc | 2727 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SRP_A_CALC); |
f63a17d6 | 2728 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2729 | } |
2730 | } | |
2731 | #endif | |
2732 | ||
f63a17d6 MC |
2733 | if (!tls_process_initial_server_flight(s)) { |
2734 | /* SSLfatal() already called */ | |
2735 | return MSG_PROCESS_ERROR; | |
2736 | } | |
7776a36c | 2737 | |
bd79bcb4 | 2738 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2739 | } |
176f31dd | 2740 | |
a2c2e000 | 2741 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2742 | { |
7689082b | 2743 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2744 | int ret = 0; |
2745 | /* | |
2746 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2747 | * \0-terminated identity. The last byte is for us for simulating | |
2748 | * strnlen. | |
2749 | */ | |
2750 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2751 | size_t identitylen = 0; | |
2752 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2753 | unsigned char *tmppsk = NULL; | |
2754 | char *tmpidentity = NULL; | |
2755 | size_t psklen = 0; | |
2756 | ||
2757 | if (s->psk_client_callback == NULL) { | |
c48ffbcc | 2758 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2759 | goto err; |
2760 | } | |
d02b48c6 | 2761 | |
13c0ec4a | 2762 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2763 | |
13c0ec4a MC |
2764 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2765 | identity, sizeof(identity) - 1, | |
2766 | psk, sizeof(psk)); | |
7689082b | 2767 | |
13c0ec4a | 2768 | if (psklen > PSK_MAX_PSK_LEN) { |
c48ffbcc | 2769 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2770 | goto err; |
2771 | } else if (psklen == 0) { | |
c48ffbcc | 2772 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_PSK_IDENTITY_NOT_FOUND); |
13c0ec4a MC |
2773 | goto err; |
2774 | } | |
7689082b | 2775 | |
13c0ec4a MC |
2776 | identitylen = strlen(identity); |
2777 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2778 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2779 | goto err; |
2780 | } | |
7689082b | 2781 | |
13c0ec4a MC |
2782 | tmppsk = OPENSSL_memdup(psk, psklen); |
2783 | tmpidentity = OPENSSL_strdup(identity); | |
2784 | if (tmppsk == NULL || tmpidentity == NULL) { | |
c48ffbcc | 2785 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2786 | goto err; |
2787 | } | |
7689082b | 2788 | |
555cbb32 TS |
2789 | OPENSSL_free(s->s3.tmp.psk); |
2790 | s->s3.tmp.psk = tmppsk; | |
2791 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
2792 | tmppsk = NULL; |
2793 | OPENSSL_free(s->session->psk_identity); | |
2794 | s->session->psk_identity = tmpidentity; | |
2795 | tmpidentity = NULL; | |
f1ec23c0 | 2796 | |
b2b3024e | 2797 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
c48ffbcc | 2798 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2799 | goto err; |
2800 | } | |
7689082b | 2801 | |
13c0ec4a | 2802 | ret = 1; |
0bce0b02 | 2803 | |
13c0ec4a MC |
2804 | err: |
2805 | OPENSSL_cleanse(psk, psklen); | |
2806 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2807 | OPENSSL_clear_free(tmppsk, psklen); | |
2808 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2809 | |
13c0ec4a MC |
2810 | return ret; |
2811 | #else | |
c48ffbcc | 2812 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a | 2813 | return 0; |
b9908bf9 | 2814 | #endif |
13c0ec4a | 2815 | } |
b9908bf9 | 2816 | |
a2c2e000 | 2817 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2818 | { |
f1ec23c0 | 2819 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2820 | EVP_PKEY *pkey = NULL; |
2821 | EVP_PKEY_CTX *pctx = NULL; | |
2822 | size_t enclen; | |
2823 | unsigned char *pms = NULL; | |
2824 | size_t pmslen = 0; | |
b9908bf9 | 2825 | |
13c0ec4a MC |
2826 | if (s->session->peer == NULL) { |
2827 | /* | |
2828 | * We should always have a server certificate with SSL_kRSA. | |
2829 | */ | |
c48ffbcc | 2830 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2831 | return 0; |
2832 | } | |
0f113f3e | 2833 | |
13c0ec4a | 2834 | pkey = X509_get0_pubkey(s->session->peer); |
d7e498ac | 2835 | if (!EVP_PKEY_is_a(pkey, "RSA")) { |
c48ffbcc | 2836 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2837 | return 0; |
2838 | } | |
0f113f3e | 2839 | |
13c0ec4a MC |
2840 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2841 | pms = OPENSSL_malloc(pmslen); | |
2842 | if (pms == NULL) { | |
c48ffbcc | 2843 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2844 | return 0; |
2845 | } | |
0bce0b02 | 2846 | |
13c0ec4a MC |
2847 | pms[0] = s->client_version >> 8; |
2848 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2849 | /* TODO(size_t): Convert this function */ |
8f21260b | 2850 | if (RAND_bytes_ex(s->ctx->libctx, pms + 2, (int)(pmslen - 2)) <= 0) { |
c48ffbcc | 2851 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2852 | goto err; |
2853 | } | |
0f113f3e | 2854 | |
13c0ec4a | 2855 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2856 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 2857 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2858 | goto err; |
2859 | } | |
3aceb9ec MC |
2860 | |
2861 | pctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, pkey, s->ctx->propq); | |
13c0ec4a MC |
2862 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2863 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
13c0ec4a MC |
2865 | goto err; |
2866 | } | |
f1ec23c0 MC |
2867 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2868 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2870 | goto err; |
2871 | } | |
13c0ec4a MC |
2872 | EVP_PKEY_CTX_free(pctx); |
2873 | pctx = NULL; | |
0f113f3e | 2874 | |
13c0ec4a | 2875 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2876 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
c48ffbcc | 2877 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 2878 | goto err; |
b9908bf9 | 2879 | } |
13c0ec4a | 2880 | |
2faa1b48 | 2881 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
2882 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
2883 | /* SSLfatal() already called */ | |
2faa1b48 | 2884 | goto err; |
a2c2e000 | 2885 | } |
2faa1b48 | 2886 | |
555cbb32 TS |
2887 | s->s3.tmp.pms = pms; |
2888 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 2889 | |
13c0ec4a MC |
2890 | return 1; |
2891 | err: | |
2892 | OPENSSL_clear_free(pms, pmslen); | |
2893 | EVP_PKEY_CTX_free(pctx); | |
2894 | ||
2895 | return 0; | |
13c0ec4a MC |
2896 | } |
2897 | ||
a2c2e000 | 2898 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 | 2899 | { |
a8c1c704 | 2900 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2901 | unsigned char *keybytes = NULL; |
807b0a1d | 2902 | int prime_len; |
cb5a427a MC |
2903 | unsigned char *encoded_pub = NULL; |
2904 | size_t encoded_pub_len, pad_len; | |
2905 | int ret = 0; | |
a8c1c704 | 2906 | |
555cbb32 | 2907 | skey = s->s3.peer_tmp; |
a2c2e000 | 2908 | if (skey == NULL) { |
c48ffbcc | 2909 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 2910 | goto err; |
a2c2e000 | 2911 | } |
f1ec23c0 | 2912 | |
0f00ed77 | 2913 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 | 2914 | if (ckey == NULL) { |
c48ffbcc | 2915 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b599ce3b | 2916 | goto err; |
a2c2e000 | 2917 | } |
b599ce3b | 2918 | |
a2c2e000 MC |
2919 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
2920 | /* SSLfatal() already called */ | |
f1ec23c0 | 2921 | goto err; |
a2c2e000 | 2922 | } |
a8c1c704 MC |
2923 | |
2924 | /* send off the data */ | |
cb5a427a MC |
2925 | |
2926 | /* Generate encoding of server key */ | |
2927 | encoded_pub_len = EVP_PKEY_get1_encoded_public_key(ckey, &encoded_pub); | |
2928 | if (encoded_pub_len == 0) { | |
2929 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2930 | EVP_PKEY_free(skey); | |
2931 | return EXT_RETURN_FAIL; | |
2932 | } | |
2933 | ||
807b0a1d FM |
2934 | /* |
2935 | * For interoperability with some versions of the Microsoft TLS | |
2936 | * stack, we need to zero pad the DHE pub key to the same length | |
cb5a427a | 2937 | * as the prime. |
807b0a1d | 2938 | */ |
cb5a427a MC |
2939 | prime_len = EVP_PKEY_size(ckey); |
2940 | pad_len = prime_len - encoded_pub_len; | |
2941 | if (pad_len > 0) { | |
2942 | if (!WPACKET_sub_allocate_bytes_u16(pkt, pad_len, &keybytes)) { | |
2943 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2944 | goto err; | |
2945 | } | |
2946 | memset(keybytes, 0, pad_len); | |
2947 | } | |
2948 | ||
2949 | if (!WPACKET_sub_memcpy_u16(pkt, encoded_pub, encoded_pub_len)) { | |
c48ffbcc | 2950 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 2951 | goto err; |
a2c2e000 | 2952 | } |
f1ec23c0 | 2953 | |
cb5a427a | 2954 | ret = 1; |
f1ec23c0 | 2955 | err: |
cb5a427a | 2956 | OPENSSL_free(encoded_pub); |
f1ec23c0 | 2957 | EVP_PKEY_free(ckey); |
cb5a427a | 2958 | return ret; |
a8c1c704 MC |
2959 | } |
2960 | ||
a2c2e000 | 2961 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab | 2962 | { |
67ad5aab | 2963 | unsigned char *encodedPoint = NULL; |
348240c6 | 2964 | size_t encoded_pt_len = 0; |
67ad5aab | 2965 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2966 | int ret = 0; |
67ad5aab | 2967 | |
555cbb32 | 2968 | skey = s->s3.peer_tmp; |
ec24630a | 2969 | if (skey == NULL) { |
c48ffbcc | 2970 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2971 | return 0; |
2972 | } | |
2973 | ||
0f00ed77 | 2974 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 2975 | if (ckey == NULL) { |
c48ffbcc | 2976 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
b599ce3b MC |
2977 | goto err; |
2978 | } | |
67ad5aab | 2979 | |
0f1e51ea | 2980 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 2981 | /* SSLfatal() already called */ |
67ad5aab MC |
2982 | goto err; |
2983 | } | |
2984 | ||
2985 | /* Generate encoding of client key */ | |
5ac8fb58 | 2986 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(ckey, &encodedPoint); |
67ad5aab MC |
2987 | |
2988 | if (encoded_pt_len == 0) { | |
c48ffbcc | 2989 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
67ad5aab MC |
2990 | goto err; |
2991 | } | |
2992 | ||
b2b3024e | 2993 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
c48ffbcc | 2994 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2995 | goto err; |
2996 | } | |
67ad5aab | 2997 | |
f1ec23c0 | 2998 | ret = 1; |
67ad5aab | 2999 | err: |
f1ec23c0 | 3000 | OPENSSL_free(encodedPoint); |
67ad5aab | 3001 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3002 | return ret; |
67ad5aab MC |
3003 | } |
3004 | ||
a2c2e000 | 3005 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3006 | { |
3007 | #ifndef OPENSSL_NO_GOST | |
3008 | /* GOST key exchange message creation */ | |
3009 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3010 | X509 *peer_cert; | |
3011 | size_t msglen; | |
3012 | unsigned int md_len; | |
3013 | unsigned char shared_ukm[32], tmp[256]; | |
3014 | EVP_MD_CTX *ukm_hash = NULL; | |
3015 | int dgst_nid = NID_id_GostR3411_94; | |
3016 | unsigned char *pms = NULL; | |
3017 | size_t pmslen = 0; | |
3018 | ||
555cbb32 | 3019 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3020 | dgst_nid = NID_id_GostR3411_2012_256; |
3021 | ||
3022 | /* | |
1ee4b98e | 3023 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3024 | */ |
3025 | peer_cert = s->session->peer; | |
12a765a5 | 3026 | if (peer_cert == NULL) { |
c48ffbcc RL |
3027 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3028 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
e00e0b3d MC |
3029 | return 0; |
3030 | } | |
3031 | ||
0f00ed77 MC |
3032 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, |
3033 | X509_get0_pubkey(peer_cert), | |
3034 | s->ctx->propq); | |
e00e0b3d | 3035 | if (pkey_ctx == NULL) { |
c48ffbcc | 3036 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
3037 | return 0; |
3038 | } | |
3039 | /* | |
3040 | * If we have send a certificate, and certificate key | |
3041 | * parameters match those of server certificate, use | |
3042 | * certificate key for key exchange | |
3043 | */ | |
3044 | ||
3045 | /* Otherwise, generate ephemeral key pair */ | |
3046 | pmslen = 32; | |
3047 | pms = OPENSSL_malloc(pmslen); | |
3048 | if (pms == NULL) { | |
c48ffbcc | 3049 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
2f3930bc | 3050 | goto err; |
e00e0b3d MC |
3051 | } |
3052 | ||
3053 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3054 | /* Generate session key |
3055 | * TODO(size_t): Convert this function | |
3056 | */ | |
8f21260b | 3057 | || RAND_bytes_ex(s->ctx->libctx, pms, (int)pmslen) <= 0) { |
c48ffbcc | 3058 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3059 | goto err; |
3060 | }; | |
e00e0b3d MC |
3061 | /* |
3062 | * Compute shared IV and store it in algorithm-specific context | |
3063 | * data | |
3064 | */ | |
3065 | ukm_hash = EVP_MD_CTX_new(); | |
3066 | if (ukm_hash == NULL | |
a230b26e | 3067 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3068 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3069 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3070 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3071 | SSL3_RANDOM_SIZE) <= 0 |
3072 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
c48ffbcc | 3073 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3074 | goto err; |
3075 | } | |
3076 | EVP_MD_CTX_free(ukm_hash); | |
3077 | ukm_hash = NULL; | |
3078 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3079 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
c48ffbcc | 3080 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3081 | goto err; |
3082 | } | |
3083 | /* Make GOST keytransport blob message */ | |
3084 | /* | |
3085 | * Encapsulate it into sequence | |
3086 | */ | |
e00e0b3d MC |
3087 | msglen = 255; |
3088 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3089 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3090 | goto err; |
3091 | } | |
f1ec23c0 | 3092 | |
08029dfa MC |
3093 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3094 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3095 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
c48ffbcc | 3096 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3097 | goto err; |
e00e0b3d | 3098 | } |
f1ec23c0 | 3099 | |
e00e0b3d | 3100 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3101 | s->s3.tmp.pms = pms; |
3102 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3103 | |
3104 | return 1; | |
3105 | err: | |
3106 | EVP_PKEY_CTX_free(pkey_ctx); | |
3107 | OPENSSL_clear_free(pms, pmslen); | |
3108 | EVP_MD_CTX_free(ukm_hash); | |
3109 | return 0; | |
3110 | #else | |
c48ffbcc | 3111 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3112 | return 0; |
3113 | #endif | |
3114 | } | |
3115 | ||
5a5530a2 DB |
3116 | #ifndef OPENSSL_NO_GOST |
3117 | int gost18_cke_cipher_nid(const SSL *s) | |
3118 | { | |
3119 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3120 | return NID_magma_ctr; | |
3121 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3122 | return NID_kuznyechik_ctr; | |
3123 | ||
3124 | return NID_undef; | |
3125 | } | |
3126 | ||
3127 | int gost_ukm(const SSL *s, unsigned char *dgst_buf) | |
3128 | { | |
3129 | EVP_MD_CTX * hash = NULL; | |
3130 | unsigned int md_len; | |
3131 | const EVP_MD *md = ssl_evp_md_fetch(s->ctx->libctx, NID_id_GostR3411_2012_256, s->ctx->propq); | |
3132 | ||
3133 | if (md == NULL) | |
3134 | return 0; | |
3135 | ||
3136 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3137 | || EVP_DigestInit(hash, md) <= 0 | |
3138 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3139 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3140 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3141 | EVP_MD_CTX_free(hash); | |
3142 | ssl_evp_md_free(md); | |
3143 | return 0; | |
3144 | } | |
3145 | ||
3146 | EVP_MD_CTX_free(hash); | |
3147 | ssl_evp_md_free(md); | |
3148 | return 1; | |
3149 | } | |
3150 | #endif | |
3151 | ||
3152 | static int tls_construct_cke_gost18(SSL *s, WPACKET *pkt) | |
3153 | { | |
3154 | #ifndef OPENSSL_NO_GOST | |
3155 | /* GOST 2018 key exchange message creation */ | |
3156 | unsigned char rnd_dgst[32], tmp[255]; | |
3157 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3158 | X509 *peer_cert; | |
3159 | unsigned char *pms = NULL; | |
3160 | size_t pmslen = 0; | |
3161 | size_t msglen; | |
3162 | int cipher_nid = gost18_cke_cipher_nid(s); | |
3163 | ||
3164 | if (cipher_nid == NID_undef) { | |
c48ffbcc | 3165 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3166 | return 0; |
3167 | } | |
3168 | ||
3169 | if (gost_ukm(s, rnd_dgst) <= 0) { | |
c48ffbcc | 3170 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3171 | goto err; |
3172 | } | |
3173 | ||
3174 | /* Pre-master secret - random bytes */ | |
3175 | pmslen = 32; | |
3176 | pms = OPENSSL_malloc(pmslen); | |
3177 | if (pms == NULL) { | |
c48ffbcc | 3178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
5a5530a2 DB |
3179 | goto err; |
3180 | } | |
3181 | ||
3182 | if (RAND_bytes_ex(s->ctx->libctx, pms, (int)pmslen) <= 0) { | |
c48ffbcc | 3183 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3184 | goto err; |
3185 | } | |
3186 | ||
3187 | /* Get server certificate PKEY and create ctx from it */ | |
3188 | peer_cert = s->session->peer; | |
3189 | if (peer_cert == NULL) { | |
c48ffbcc RL |
3190 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3191 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
5a5530a2 DB |
3192 | return 0; |
3193 | } | |
3194 | ||
c48ffbcc RL |
3195 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, |
3196 | X509_get0_pubkey(peer_cert), | |
3197 | s->ctx->propq); | |
5a5530a2 | 3198 | if (pkey_ctx == NULL) { |
c48ffbcc | 3199 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
5a5530a2 DB |
3200 | return 0; |
3201 | } | |
3202 | ||
3203 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 ) { | |
c48ffbcc | 3204 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3205 | goto err; |
3206 | }; | |
3207 | ||
3208 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3209 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3210 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) < 0) { | |
c48ffbcc | 3211 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3212 | goto err; |
3213 | } | |
3214 | ||
3215 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3216 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) < 0) { | |
c48ffbcc | 3217 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3218 | goto err; |
3219 | } | |
3220 | ||
3221 | msglen = 255; | |
3222 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3223 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3224 | goto err; |
3225 | } | |
3226 | ||
3227 | if (!WPACKET_memcpy(pkt, tmp, msglen)) { | |
c48ffbcc | 3228 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3229 | goto err; |
3230 | } | |
3231 | ||
3232 | EVP_PKEY_CTX_free(pkey_ctx); | |
3233 | s->s3.tmp.pms = pms; | |
3234 | s->s3.tmp.pmslen = pmslen; | |
3235 | ||
3236 | return 1; | |
3237 | err: | |
3238 | EVP_PKEY_CTX_free(pkey_ctx); | |
3239 | OPENSSL_clear_free(pms, pmslen); | |
3240 | return 0; | |
3241 | #else | |
c48ffbcc | 3242 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3243 | return 0; |
3244 | #endif | |
3245 | } | |
3246 | ||
a2c2e000 | 3247 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3248 | { |
8b9546c7 | 3249 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3250 | unsigned char *abytes = NULL; |
3251 | ||
3252 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3253 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3254 | &abytes)) { | |
c48ffbcc | 3255 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3256 | return 0; |
3257 | } | |
f1ec23c0 MC |
3258 | BN_bn2bin(s->srp_ctx.A, abytes); |
3259 | ||
840a2bf8 MC |
3260 | OPENSSL_free(s->session->srp_username); |
3261 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3262 | if (s->session->srp_username == NULL) { | |
c48ffbcc | 3263 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3264 | return 0; |
3265 | } | |
3266 | ||
3267 | return 1; | |
3268 | #else | |
c48ffbcc | 3269 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3270 | return 0; |
3271 | #endif | |
3272 | } | |
3273 | ||
7cea05dc | 3274 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3275 | { |
13c0ec4a | 3276 | unsigned long alg_k; |
13c0ec4a | 3277 | |
555cbb32 | 3278 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3279 | |
a2c2e000 MC |
3280 | /* |
3281 | * All of the construct functions below call SSLfatal() if necessary so | |
3282 | * no need to do so here. | |
3283 | */ | |
13c0ec4a | 3284 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3285 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3286 | goto err; |
3287 | ||
f1ec23c0 | 3288 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3289 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3290 | goto err; |
a8c1c704 | 3291 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3292 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3293 | goto err; |
67ad5aab | 3294 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3295 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3296 | goto err; |
e00e0b3d | 3297 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3298 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3299 | goto err; |
5a5530a2 DB |
3300 | } else if (alg_k & SSL_kGOST18) { |
3301 | if (!tls_construct_cke_gost18(s, pkt)) | |
3302 | goto err; | |
840a2bf8 | 3303 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3304 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3305 | goto err; |
4a424545 | 3306 | } else if (!(alg_k & SSL_kPSK)) { |
c48ffbcc | 3307 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3308 | goto err; |
3309 | } | |
3310 | ||
b9908bf9 | 3311 | return 1; |
0f113f3e | 3312 | err: |
555cbb32 TS |
3313 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3314 | s->s3.tmp.pms = NULL; | |
7689082b | 3315 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3316 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3317 | s->s3.tmp.psk = NULL; | |
0f113f3e | 3318 | #endif |
b9908bf9 MC |
3319 | return 0; |
3320 | } | |
3321 | ||
3322 | int tls_client_key_exchange_post_work(SSL *s) | |
3323 | { | |
3324 | unsigned char *pms = NULL; | |
3325 | size_t pmslen = 0; | |
3326 | ||
555cbb32 TS |
3327 | pms = s->s3.tmp.pms; |
3328 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3329 | |
b9908bf9 MC |
3330 | #ifndef OPENSSL_NO_SRP |
3331 | /* Check for SRP */ | |
555cbb32 | 3332 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3333 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3334 | /* SSLfatal() already called */ |
b9908bf9 MC |
3335 | goto err; |
3336 | } | |
3337 | return 1; | |
3338 | } | |
3339 | #endif | |
b9908bf9 | 3340 | |
555cbb32 | 3341 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
c48ffbcc | 3342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
b9908bf9 MC |
3343 | goto err; |
3344 | } | |
3345 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3346 | /* SSLfatal() already called */ |
6f137370 MC |
3347 | /* ssl_generate_master_secret frees the pms even on error */ |
3348 | pms = NULL; | |
3349 | pmslen = 0; | |
b9908bf9 MC |
3350 | goto err; |
3351 | } | |
6f137370 MC |
3352 | pms = NULL; |
3353 | pmslen = 0; | |
473483d4 MC |
3354 | |
3355 | #ifndef OPENSSL_NO_SCTP | |
3356 | if (SSL_IS_DTLS(s)) { | |
3357 | unsigned char sctpauthkey[64]; | |
3358 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3359 | size_t labellen; |
473483d4 MC |
3360 | |
3361 | /* | |
3362 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3363 | * used. | |
3364 | */ | |
141eb8c6 MC |
3365 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3366 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3367 | |
09d62b33 MT |
3368 | /* Don't include the terminating zero. */ |
3369 | labellen = sizeof(labelbuffer) - 1; | |
3370 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3371 | labellen += 1; | |
3372 | ||
473483d4 | 3373 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e | 3374 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3375 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 3376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
473483d4 | 3377 | goto err; |
a2c2e000 | 3378 | } |
473483d4 MC |
3379 | |
3380 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3381 | sizeof(sctpauthkey), sctpauthkey); | |
3382 | } | |
3383 | #endif | |
3384 | ||
b9908bf9 MC |
3385 | return 1; |
3386 | err: | |
3387 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3388 | s->s3.tmp.pms = NULL; |
b9908bf9 | 3389 | return 0; |
0f113f3e | 3390 | } |
d02b48c6 | 3391 | |
0f113f3e MC |
3392 | /* |
3393 | * Check a certificate can be used for client authentication. Currently check | |
3394 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3395 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3396 | */ |
3397 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3398 | { |
0f113f3e | 3399 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3400 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3401 | return 0; |
3402 | /* | |
3403 | * If strict mode check suitability of chain before using it. This also | |
3404 | * adjusts suite B digest if necessary. | |
3405 | */ | |
3406 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3407 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3408 | return 0; | |
0f113f3e MC |
3409 | return 1; |
3410 | } | |
0d609395 | 3411 | |
be3583fa | 3412 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3413 | { |
3414 | X509 *x509 = NULL; | |
3415 | EVP_PKEY *pkey = NULL; | |
3416 | int i; | |
3417 | ||
b9908bf9 | 3418 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3419 | /* Let cert callback update client certificates if required */ |
3420 | if (s->cert->cert_cb) { | |
3421 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3422 | if (i < 0) { | |
3423 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3424 | return WORK_MORE_A; |
0f113f3e MC |
3425 | } |
3426 | if (i == 0) { | |
c48ffbcc | 3427 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_CALLBACK_FAILED); |
eb5fd03b | 3428 | return WORK_ERROR; |
0f113f3e MC |
3429 | } |
3430 | s->rwstate = SSL_NOTHING; | |
3431 | } | |
9d75dce3 TS |
3432 | if (ssl3_check_client_certificate(s)) { |
3433 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3434 | return WORK_FINISHED_STOP; | |
3435 | } | |
b9908bf9 | 3436 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3437 | } |
b9908bf9 MC |
3438 | |
3439 | /* Fall through to WORK_MORE_B */ | |
3440 | wst = WORK_MORE_B; | |
0f113f3e MC |
3441 | } |
3442 | ||
3443 | /* We need to get a client cert */ | |
b9908bf9 | 3444 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3445 | /* |
3446 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3447 | * return(-1); We then get retied later | |
3448 | */ | |
0f113f3e MC |
3449 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3450 | if (i < 0) { | |
3451 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3452 | return WORK_MORE_B; |
0f113f3e MC |
3453 | } |
3454 | s->rwstate = SSL_NOTHING; | |
3455 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3456 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3457 | i = 0; | |
3458 | } else if (i == 1) { | |
3459 | i = 0; | |
6849b73c | 3460 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
0f113f3e MC |
3461 | } |
3462 | ||
222561fe | 3463 | X509_free(x509); |
25aaa98a | 3464 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3465 | if (i && !ssl3_check_client_certificate(s)) |
3466 | i = 0; | |
3467 | if (i == 0) { | |
3468 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3469 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3470 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3471 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3472 | } else { |
555cbb32 | 3473 | s->s3.tmp.cert_req = 2; |
124037fd | 3474 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3475 | /* SSLfatal() already called */ |
eb5fd03b | 3476 | return WORK_ERROR; |
dab18ab5 | 3477 | } |
0f113f3e MC |
3478 | } |
3479 | } | |
3480 | ||
9d75dce3 TS |
3481 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3482 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3483 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3484 | } |
3485 | ||
b9908bf9 | 3486 | /* Shouldn't ever get here */ |
c48ffbcc | 3487 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3488 | return WORK_ERROR; |
3489 | } | |
3490 | ||
7cea05dc | 3491 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3492 | { |
9d75dce3 TS |
3493 | if (SSL_IS_TLS13(s)) { |
3494 | if (s->pha_context == NULL) { | |
3495 | /* no context available, add 0-length context */ | |
3496 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
c48ffbcc | 3497 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d75dce3 TS |
3498 | return 0; |
3499 | } | |
3500 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
c48ffbcc | 3501 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d75dce3 TS |
3502 | return 0; |
3503 | } | |
f63a17d6 MC |
3504 | } |
3505 | if (!ssl3_output_cert_chain(s, pkt, | |
555cbb32 | 3506 | (s->s3.tmp.cert_req == 2) ? NULL |
f63a17d6 MC |
3507 | : s->cert->key)) { |
3508 | /* SSLfatal() already called */ | |
3509 | return 0; | |
f7e393be MC |
3510 | } |
3511 | ||
3512 | if (SSL_IS_TLS13(s) | |
3513 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3514 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3515 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3516 | /* |
a2c2e000 | 3517 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3518 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3519 | */ |
c48ffbcc | 3520 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); |
c31ad0bb | 3521 | return 0; |
0f113f3e | 3522 | } |
b9908bf9 MC |
3523 | |
3524 | return 1; | |
0f113f3e MC |
3525 | } |
3526 | ||
36d16f8e | 3527 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3528 | { |
dd24857b DSH |
3529 | const SSL_CERT_LOOKUP *clu; |
3530 | size_t idx; | |
0f113f3e | 3531 | long alg_k, alg_a; |
d02b48c6 | 3532 | |
555cbb32 TS |
3533 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3534 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3535 | |
0f113f3e | 3536 | /* we don't have a certificate */ |
dd24857b DSH |
3537 | if (!(alg_a & SSL_aCERT)) |
3538 | return 1; | |
d02b48c6 | 3539 | |
0f113f3e | 3540 | /* This is the passed certificate */ |
dd24857b | 3541 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3542 | |
dd24857b DSH |
3543 | /* Check certificate is recognised and suitable for cipher */ |
3544 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
c48ffbcc | 3545 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_MISSING_SIGNING_CERT); |
f63a17d6 | 3546 | return 0; |
0f113f3e | 3547 | } |
0f113f3e | 3548 | |
dd24857b DSH |
3549 | if (clu->amask & SSL_aECDSA) { |
3550 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3551 | return 1; | |
c48ffbcc | 3552 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_ECC_CERT); |
f63a17d6 | 3553 | return 0; |
0f113f3e | 3554 | } |
462f4f4b | 3555 | |
dd24857b | 3556 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 | 3557 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 MC |
3558 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
3559 | return 0; | |
0f113f3e | 3560 | } |
5b64ce89 | 3561 | |
555cbb32 | 3562 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
c48ffbcc | 3563 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 3564 | return 0; |
0f113f3e | 3565 | } |
d02b48c6 | 3566 | |
dd24857b | 3567 | return 1; |
0f113f3e MC |
3568 | } |
3569 | ||
e481f9b9 | 3570 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3571 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3572 | { |
15e6be6c MC |
3573 | size_t len, padding_len; |
3574 | unsigned char *padding = NULL; | |
15e6be6c | 3575 | |
aff8c126 | 3576 | len = s->ext.npn_len; |
b9908bf9 | 3577 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3578 | |
aff8c126 | 3579 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3580 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
c48ffbcc | 3581 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
a2c2e000 | 3582 | return 0; |
15e6be6c MC |
3583 | } |
3584 | ||
3585 | memset(padding, 0, padding_len); | |
3586 | ||
b9908bf9 MC |
3587 | return 1; |
3588 | } | |
6434abbf | 3589 | #endif |
368888bc | 3590 | |
c7f47786 MC |
3591 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3592 | { | |
3593 | if (PACKET_remaining(pkt) > 0) { | |
3594 | /* should contain no data */ | |
c48ffbcc | 3595 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
c7f47786 MC |
3596 | return MSG_PROCESS_ERROR; |
3597 | } | |
3598 | ||
db0f35dd TS |
3599 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3600 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3601 | return MSG_PROCESS_FINISHED_READING; | |
3602 | } | |
3603 | ||
c7f47786 | 3604 | /* |
1f04f23e MC |
3605 | * This is a historical discrepancy (not in the RFC) maintained for |
3606 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3607 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3608 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3609 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3610 | */ |
3611 | if (SSL_IS_DTLS(s)) | |
3612 | SSL_renegotiate(s); | |
3613 | else | |
3614 | SSL_renegotiate_abbreviated(s); | |
3615 | ||
3616 | return MSG_PROCESS_FINISHED_READING; | |
3617 | } | |
3618 | ||
e46f2334 MC |
3619 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3620 | { | |
e46f2334 | 3621 | PACKET extensions; |
3434f40b | 3622 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3623 | |
26b9172a MC |
3624 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3625 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 3626 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e46f2334 MC |
3627 | goto err; |
3628 | } | |
3629 | ||
fe874d27 MC |
3630 | if (!tls_collect_extensions(s, &extensions, |
3631 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3632 | NULL, 1) |
fe874d27 | 3633 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3634 | rawexts, NULL, 0, 1)) { |
3635 | /* SSLfatal() already called */ | |
3434f40b | 3636 | goto err; |
f63a17d6 | 3637 | } |
3434f40b | 3638 | |
1b0286a3 | 3639 | OPENSSL_free(rawexts); |
e46f2334 MC |
3640 | return MSG_PROCESS_CONTINUE_READING; |
3641 | ||
3642 | err: | |
1b0286a3 | 3643 | OPENSSL_free(rawexts); |
e46f2334 MC |
3644 | return MSG_PROCESS_ERROR; |
3645 | } | |
3646 | ||
368888bc | 3647 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3648 | { |
3649 | int i = 0; | |
368888bc | 3650 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 3651 | if (s->ctx->client_cert_engine) { |
301fcb28 | 3652 | i = tls_engine_load_ssl_client_cert(s, px509, ppkey); |
0f113f3e MC |
3653 | if (i != 0) |
3654 | return i; | |
3655 | } | |
3656 | #endif | |
3657 | if (s->ctx->client_cert_cb) | |
3658 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3659 | return i; | |
3660 | } | |
d45ba43d | 3661 | |
ae2f7b37 | 3662 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3663 | { |
2c7b4dbc | 3664 | int i; |
aafec89c | 3665 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3666 | int empty_reneg_info_scsv = !s->renegotiate; |
1d0c08b4 | 3667 | |
d45ba43d | 3668 | /* Set disabled masks for this session */ |
1d0c08b4 | 3669 | if (!ssl_set_client_disabled(s)) { |
c48ffbcc | 3670 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_PROTOCOLS_AVAILABLE); |
1d0c08b4 MC |
3671 | return 0; |
3672 | } | |
d45ba43d | 3673 | |
f63a17d6 | 3674 | if (sk == NULL) { |
c48ffbcc | 3675 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
26a7d938 | 3676 | return 0; |
f63a17d6 | 3677 | } |
d45ba43d | 3678 | |
2c7b4dbc MC |
3679 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3680 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3681 | # error Max cipher length too short | |
3682 | # endif | |
3683 | /* | |
3684 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3685 | * chop number of supported ciphers to keep it well below this if we | |
3686 | * use TLS v1.2 | |
3687 | */ | |
3688 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3689 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3690 | else | |
3691 | #endif | |
3692 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3693 | maxlen = 0xfffe; | |
3694 | ||
3695 | if (empty_reneg_info_scsv) | |
3696 | maxlen -= 2; | |
3697 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3698 | maxlen -= 2; | |
3699 | ||
3700 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3701 | const SSL_CIPHER *c; | |
3702 | ||
d45ba43d MC |
3703 | c = sk_SSL_CIPHER_value(sk, i); |
3704 | /* Skip disabled ciphers */ | |
8af91fd9 | 3705 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3706 | continue; |
2c7b4dbc MC |
3707 | |
3708 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
c48ffbcc | 3709 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3710 | return 0; |
3711 | } | |
3712 | ||
aafec89c MC |
3713 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3714 | if (!maxverok) { | |
3715 | if (SSL_IS_DTLS(s)) { | |
555cbb32 TS |
3716 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
3717 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
3718 | maxverok = 1; |
3719 | } else { | |
555cbb32 TS |
3720 | if (c->max_tls >= s->s3.tmp.max_ver |
3721 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
3722 | maxverok = 1; |
3723 | } | |
3724 | } | |
3725 | ||
2c7b4dbc | 3726 | totlen += len; |
d45ba43d | 3727 | } |
2c7b4dbc | 3728 | |
aafec89c | 3729 | if (totlen == 0 || !maxverok) { |
c48ffbcc RL |
3730 | const char *maxvertext = |
3731 | !maxverok | |
3732 | ? "No ciphers enabled for max supported SSL/TLS version" | |
3733 | : NULL; | |
aafec89c | 3734 | |
c48ffbcc RL |
3735 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_CIPHERS_AVAILABLE, |
3736 | maxvertext); | |
2c7b4dbc MC |
3737 | return 0; |
3738 | } | |
3739 | ||
3740 | if (totlen != 0) { | |
d45ba43d MC |
3741 | if (empty_reneg_info_scsv) { |
3742 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3743 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3744 | }; |
2c7b4dbc | 3745 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3746 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3747 | return 0; |
3748 | } | |
d45ba43d MC |
3749 | } |
3750 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3751 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3752 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3753 | }; |
2c7b4dbc | 3754 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3755 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3756 | return 0; |
3757 | } | |
d45ba43d MC |
3758 | } |
3759 | } | |
3760 | ||
2c7b4dbc | 3761 | return 1; |
d45ba43d | 3762 | } |
ef6c191b MC |
3763 | |
3764 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3765 | { | |
3766 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3767 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
c48ffbcc | 3768 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
ef6c191b MC |
3769 | return 0; |
3770 | } | |
3771 | ||
3772 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3773 | return 1; | |
3774 | } |