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846e33c7 | 1 | /* |
9d75dce3 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
846e33c7 RS |
6 | * Licensed under the OpenSSL license (the "License"). You may not use |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
dee0cc10 | 14 | #include <assert.h> |
8ba708e5 | 15 | #include "../ssl_locl.h" |
61ae935a | 16 | #include "statem_locl.h" |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
dbad1690 | 21 | #include <openssl/md5.h> |
3c27208f | 22 | #include <openssl/dh.h> |
d095b68d | 23 | #include <openssl/bn.h> |
3c27208f | 24 | #include <openssl/engine.h> |
f9b3bff6 | 25 | |
597c51bc | 26 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
27 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
28 | ||
7ab09630 | 29 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 30 | static int key_exchange_expected(SSL *s); |
d45ba43d | 31 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 32 | WPACKET *pkt); |
ea262260 | 33 | |
61ae935a MC |
34 | /* |
35 | * Is a CertificateRequest message allowed at the moment or not? | |
36 | * | |
37 | * Return values are: | |
38 | * 1: Yes | |
39 | * 0: No | |
40 | */ | |
7ab09630 | 41 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
42 | { |
43 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 44 | if ((s->version > SSL3_VERSION |
a230b26e EK |
45 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
46 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
47 | return 0; |
48 | ||
49 | return 1; | |
50 | } | |
51 | ||
52 | /* | |
a455d0f6 | 53 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
54 | * |
55 | * Return values are: | |
56 | * 1: Yes | |
57 | * 0: No | |
58 | */ | |
a455d0f6 | 59 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
60 | { |
61 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
62 | ||
63 | /* | |
64 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 65 | * ciphersuite or for SRP |
61ae935a | 66 | */ |
a455d0f6 MC |
67 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
68 | | SSL_kSRP)) { | |
69 | return 1; | |
61ae935a MC |
70 | } |
71 | ||
a455d0f6 | 72 | return 0; |
61ae935a MC |
73 | } |
74 | ||
0f1e51ea MC |
75 | /* |
76 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
77 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
78 | * server. The message type that the server has sent is provided in |mt|. The | |
79 | * current state is in |s->statem.hand_state|. | |
80 | * | |
94ed2c67 MC |
81 | * Return values are 1 for success (transition allowed) and 0 on error |
82 | * (transition not allowed) | |
0f1e51ea MC |
83 | */ |
84 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
85 | { | |
86 | OSSL_STATEM *st = &s->statem; | |
87 | ||
88 | /* | |
89 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
90 | * yet negotiated TLSv1.3 at that point so that is handled by | |
91 | * ossl_statem_client_read_transition() | |
92 | */ | |
93 | ||
94 | switch (st->hand_state) { | |
95 | default: | |
96 | break; | |
97 | ||
3847d426 MC |
98 | case TLS_ST_CW_CLNT_HELLO: |
99 | /* | |
100 | * This must a ClientHello following a HelloRetryRequest, so the only | |
101 | * thing we can get now is a ServerHello. | |
102 | */ | |
103 | if (mt == SSL3_MT_SERVER_HELLO) { | |
104 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
105 | return 1; | |
106 | } | |
107 | break; | |
108 | ||
0f1e51ea | 109 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
110 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
111 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
112 | return 1; | |
113 | } | |
114 | break; | |
115 | ||
116 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 117 | if (s->hit) { |
92760c21 MC |
118 | if (mt == SSL3_MT_FINISHED) { |
119 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
120 | return 1; |
121 | } | |
122 | } else { | |
92760c21 MC |
123 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
124 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
125 | return 1; | |
f5ca0b04 MC |
126 | } |
127 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
128 | st->hand_state = TLS_ST_CR_CERT; |
129 | return 1; | |
130 | } | |
131 | } | |
132 | break; | |
133 | ||
92760c21 MC |
134 | case TLS_ST_CR_CERT_REQ: |
135 | if (mt == SSL3_MT_CERTIFICATE) { | |
136 | st->hand_state = TLS_ST_CR_CERT; | |
137 | return 1; | |
138 | } | |
139 | break; | |
140 | ||
0f1e51ea | 141 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
142 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
143 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
144 | return 1; | |
145 | } | |
146 | break; | |
147 | ||
148 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
149 | if (mt == SSL3_MT_FINISHED) { |
150 | st->hand_state = TLS_ST_CR_FINISHED; | |
151 | return 1; | |
152 | } | |
153 | break; | |
cc2455bf MC |
154 | |
155 | case TLS_ST_OK: | |
156 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
157 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
158 | return 1; | |
159 | } | |
e1c3de44 MC |
160 | if (mt == SSL3_MT_KEY_UPDATE) { |
161 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
162 | return 1; | |
163 | } | |
9d75dce3 TS |
164 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
165 | #if DTLS_MAX_VERSION != DTLS1_2_VERSION | |
166 | # error TODO(DTLS1.3): Restore digest for PHA before adding message. | |
167 | #endif | |
168 | if (!SSL_IS_DTLS(s) && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
169 | s->post_handshake_auth = SSL_PHA_REQUESTED; | |
170 | /* | |
171 | * In TLS, this is called before the message is added to the | |
172 | * digest. In DTLS, this is expected to be called after adding | |
173 | * to the digest. Either move the digest restore, or add the | |
174 | * message here after the swap, or do it after the clientFinished? | |
175 | */ | |
176 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
177 | /* SSLfatal() already called */ | |
178 | return 0; | |
179 | } | |
180 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
181 | return 1; | |
182 | } | |
183 | } | |
cc2455bf | 184 | break; |
0f1e51ea MC |
185 | } |
186 | ||
0f1e51ea | 187 | /* No valid transition found */ |
0f1e51ea MC |
188 | return 0; |
189 | } | |
190 | ||
61ae935a | 191 | /* |
8481f583 MC |
192 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
193 | * handshake state transitions when the client is reading messages from the | |
194 | * server. The message type that the server has sent is provided in |mt|. The | |
195 | * current state is in |s->statem.hand_state|. | |
61ae935a | 196 | * |
94ed2c67 MC |
197 | * Return values are 1 for success (transition allowed) and 0 on error |
198 | * (transition not allowed) | |
61ae935a | 199 | */ |
8481f583 | 200 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 201 | { |
d6f1a6e9 | 202 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 203 | int ske_expected; |
61ae935a | 204 | |
0f1e51ea | 205 | /* |
3847d426 MC |
206 | * Note that after writing the first ClientHello we don't know what version |
207 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 208 | */ |
f5ca0b04 | 209 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
210 | if (!ossl_statem_client13_read_transition(s, mt)) |
211 | goto err; | |
212 | return 1; | |
213 | } | |
0f1e51ea | 214 | |
a230b26e | 215 | switch (st->hand_state) { |
f3b3d7f0 RS |
216 | default: |
217 | break; | |
218 | ||
61ae935a MC |
219 | case TLS_ST_CW_CLNT_HELLO: |
220 | if (mt == SSL3_MT_SERVER_HELLO) { | |
221 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
222 | return 1; | |
223 | } | |
224 | ||
225 | if (SSL_IS_DTLS(s)) { | |
226 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
227 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
228 | return 1; | |
229 | } | |
230 | } | |
231 | break; | |
232 | ||
d7f8783f | 233 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
234 | /* |
235 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
236 | * data. The only thing allowed now is a ServerHello or a | |
237 | * HelloRetryRequest. | |
238 | */ | |
239 | if (mt == SSL3_MT_SERVER_HELLO) { | |
240 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
241 | return 1; | |
242 | } | |
4004ce5f MC |
243 | break; |
244 | ||
61ae935a MC |
245 | case TLS_ST_CR_SRVR_HELLO: |
246 | if (s->hit) { | |
aff8c126 | 247 | if (s->ext.ticket_expected) { |
61ae935a MC |
248 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
249 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
250 | return 1; | |
251 | } | |
252 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
253 | st->hand_state = TLS_ST_CR_CHANGE; | |
254 | return 1; | |
255 | } | |
256 | } else { | |
257 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
258 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
259 | return 1; | |
ad3819c2 | 260 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
261 | && s->ext.session_secret_cb != NULL |
262 | && s->session->ext.tick != NULL | |
a230b26e | 263 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
264 | /* |
265 | * Normally, we can tell if the server is resuming the session | |
266 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
267 | * the next server message after the ServerHello to determine if | |
268 | * the server is resuming. | |
269 | */ | |
270 | s->hit = 1; | |
271 | st->hand_state = TLS_ST_CR_CHANGE; | |
272 | return 1; | |
61ae935a | 273 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 274 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
275 | if (mt == SSL3_MT_CERTIFICATE) { |
276 | st->hand_state = TLS_ST_CR_CERT; | |
277 | return 1; | |
278 | } | |
279 | } else { | |
a455d0f6 | 280 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
281 | /* SKE is optional for some PSK ciphersuites */ |
282 | if (ske_expected | |
a230b26e EK |
283 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
284 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
285 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
286 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
287 | return 1; | |
288 | } | |
289 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
290 | && cert_req_allowed(s)) { |
291 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
292 | return 1; | |
a455d0f6 | 293 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
294 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
295 | return 1; | |
61ae935a MC |
296 | } |
297 | } | |
298 | } | |
299 | break; | |
300 | ||
301 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
302 | /* |
303 | * The CertificateStatus message is optional even if | |
aff8c126 | 304 | * |ext.status_expected| is set |
bb1aaab4 | 305 | */ |
aff8c126 | 306 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
307 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
308 | return 1; | |
a455d0f6 MC |
309 | } |
310 | /* Fall through */ | |
311 | ||
312 | case TLS_ST_CR_CERT_STATUS: | |
313 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 314 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
315 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
316 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
317 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
318 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
319 | return 1; | |
61ae935a | 320 | } |
672f3337 | 321 | goto err; |
61ae935a | 322 | } |
a455d0f6 | 323 | /* Fall through */ |
61ae935a | 324 | |
a455d0f6 MC |
325 | case TLS_ST_CR_KEY_EXCH: |
326 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
327 | if (cert_req_allowed(s)) { | |
61ae935a MC |
328 | st->hand_state = TLS_ST_CR_CERT_REQ; |
329 | return 1; | |
61ae935a | 330 | } |
672f3337 | 331 | goto err; |
61ae935a | 332 | } |
a455d0f6 | 333 | /* Fall through */ |
61ae935a MC |
334 | |
335 | case TLS_ST_CR_CERT_REQ: | |
336 | if (mt == SSL3_MT_SERVER_DONE) { | |
337 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
338 | return 1; | |
339 | } | |
340 | break; | |
341 | ||
342 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 343 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
344 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
345 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
346 | return 1; | |
347 | } | |
61ae935a MC |
348 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
349 | st->hand_state = TLS_ST_CR_CHANGE; | |
350 | return 1; | |
351 | } | |
352 | break; | |
353 | ||
354 | case TLS_ST_CR_SESSION_TICKET: | |
355 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
356 | st->hand_state = TLS_ST_CR_CHANGE; | |
357 | return 1; | |
358 | } | |
359 | break; | |
360 | ||
361 | case TLS_ST_CR_CHANGE: | |
362 | if (mt == SSL3_MT_FINISHED) { | |
363 | st->hand_state = TLS_ST_CR_FINISHED; | |
364 | return 1; | |
365 | } | |
366 | break; | |
c7f47786 MC |
367 | |
368 | case TLS_ST_OK: | |
4004ce5f | 369 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
370 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
371 | return 1; | |
372 | } | |
373 | break; | |
61ae935a MC |
374 | } |
375 | ||
672f3337 | 376 | err: |
61ae935a | 377 | /* No valid transition found */ |
f63a17d6 MC |
378 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
379 | SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, | |
380 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
381 | return 0; |
382 | } | |
383 | ||
384 | /* | |
0f1e51ea MC |
385 | * ossl_statem_client13_write_transition() works out what handshake state to |
386 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
387 | * server. | |
0f1e51ea MC |
388 | */ |
389 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
390 | { | |
391 | OSSL_STATEM *st = &s->statem; | |
392 | ||
393 | /* | |
3847d426 MC |
394 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
395 | * TLSv1.3 yet at that point. They are handled by | |
396 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
397 | */ |
398 | switch (st->hand_state) { | |
e43e6b19 TS |
399 | default: |
400 | /* Shouldn't happen */ | |
401 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
402 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
403 | ERR_R_INTERNAL_ERROR); | |
404 | return WRITE_TRAN_ERROR; | |
405 | ||
9d75dce3 TS |
406 | case TLS_ST_CR_CERT_REQ: |
407 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
408 | st->hand_state = TLS_ST_CW_CERT; | |
409 | return WRITE_TRAN_CONTINUE; | |
410 | } | |
e43e6b19 | 411 | /* Shouldn't happen - same as default case */ |
a2c2e000 MC |
412 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
413 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
414 | ERR_R_INTERNAL_ERROR); | |
0f1e51ea MC |
415 | return WRITE_TRAN_ERROR; |
416 | ||
92760c21 | 417 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
418 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
419 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 420 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 421 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 422 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 423 | st->hand_state = TLS_ST_CW_CHANGE; |
564547e4 MC |
424 | else |
425 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT | |
426 | : TLS_ST_CW_FINISHED; | |
427 | return WRITE_TRAN_CONTINUE; | |
428 | ||
d7f8783f | 429 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
430 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
431 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
432 | return WRITE_TRAN_CONTINUE; | |
433 | } | |
434 | /* Fall through */ | |
435 | ||
436 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 437 | case TLS_ST_CW_CHANGE: |
94ed2c67 | 438 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 439 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
440 | return WRITE_TRAN_CONTINUE; |
441 | ||
442 | case TLS_ST_CW_CERT: | |
443 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 444 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 445 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
446 | return WRITE_TRAN_CONTINUE; |
447 | ||
448 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
449 | st->hand_state = TLS_ST_CW_FINISHED; |
450 | return WRITE_TRAN_CONTINUE; | |
451 | ||
e1c3de44 | 452 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
453 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
454 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
455 | return WRITE_TRAN_CONTINUE; | |
456 | } | |
457 | /* Fall through */ | |
458 | ||
9412b3ad | 459 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 460 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 461 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 462 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 463 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
464 | |
465 | case TLS_ST_OK: | |
9412b3ad MC |
466 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
467 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
468 | return WRITE_TRAN_CONTINUE; | |
469 | } | |
470 | ||
471 | /* Try to read from the server instead */ | |
cc2455bf | 472 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
473 | } |
474 | } | |
475 | ||
476 | /* | |
477 | * ossl_statem_client_write_transition() works out what handshake state to | |
478 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 479 | */ |
8481f583 | 480 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 481 | { |
d6f1a6e9 | 482 | OSSL_STATEM *st = &s->statem; |
61ae935a | 483 | |
0f1e51ea MC |
484 | /* |
485 | * Note that immediately before/after a ClientHello we don't know what | |
486 | * version we are going to negotiate yet, so we don't take this branch until | |
487 | * later | |
488 | */ | |
f5ca0b04 | 489 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
490 | return ossl_statem_client13_write_transition(s); |
491 | ||
a230b26e | 492 | switch (st->hand_state) { |
f3b3d7f0 RS |
493 | default: |
494 | /* Shouldn't happen */ | |
a2c2e000 MC |
495 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
496 | SSL_F_OSSL_STATEM_CLIENT_WRITE_TRANSITION, | |
497 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
498 | return WRITE_TRAN_ERROR; |
499 | ||
a230b26e | 500 | case TLS_ST_OK: |
c7f47786 MC |
501 | if (!s->renegotiate) { |
502 | /* | |
503 | * We haven't requested a renegotiation ourselves so we must have | |
504 | * received a message from the server. Better read it. | |
505 | */ | |
506 | return WRITE_TRAN_FINISHED; | |
507 | } | |
018fcbec BE |
508 | /* Renegotiation */ |
509 | /* fall thru */ | |
a230b26e EK |
510 | case TLS_ST_BEFORE: |
511 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
512 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 513 | |
a230b26e | 514 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
515 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
516 | /* | |
517 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
518 | * actually selected a version yet. | |
519 | */ | |
066904cc MC |
520 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
521 | st->hand_state = TLS_ST_CW_CHANGE; | |
522 | else | |
523 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
524 | return WRITE_TRAN_CONTINUE; |
525 | } | |
a230b26e EK |
526 | /* |
527 | * No transition at the end of writing because we don't know what | |
528 | * we will be sent | |
529 | */ | |
530 | return WRITE_TRAN_FINISHED; | |
61ae935a | 531 | |
597c51bc | 532 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
533 | /* |
534 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
535 | * CCS unless middlebox compat mode is off, or we already issued one | |
536 | * because we did early data. | |
537 | */ | |
538 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
539 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
540 | st->hand_state = TLS_ST_CW_CHANGE; | |
541 | else | |
542 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
543 | return WRITE_TRAN_CONTINUE; |
544 | ||
d7f8783f | 545 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
546 | return WRITE_TRAN_FINISHED; |
547 | ||
a230b26e EK |
548 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
549 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
550 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 551 | |
a230b26e EK |
552 | case TLS_ST_CR_SRVR_DONE: |
553 | if (s->s3->tmp.cert_req) | |
554 | st->hand_state = TLS_ST_CW_CERT; | |
555 | else | |
61ae935a | 556 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 557 | return WRITE_TRAN_CONTINUE; |
61ae935a | 558 | |
a230b26e EK |
559 | case TLS_ST_CW_CERT: |
560 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
561 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 562 | |
a230b26e EK |
563 | case TLS_ST_CW_KEY_EXCH: |
564 | /* | |
565 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
566 | * sent, but no verify packet is sent | |
567 | */ | |
568 | /* | |
569 | * XXX: For now, we do not support client authentication in ECDH | |
570 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
571 | * need to skip the certificate verify message when client's | |
572 | * ECDH public key is sent inside the client certificate. | |
573 | */ | |
574 | if (s->s3->tmp.cert_req == 1) { | |
575 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
576 | } else { | |
61ae935a | 577 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
578 | } |
579 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
580 | st->hand_state = TLS_ST_CW_CHANGE; | |
581 | } | |
582 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 583 | |
a230b26e EK |
584 | case TLS_ST_CW_CERT_VRFY: |
585 | st->hand_state = TLS_ST_CW_CHANGE; | |
586 | return WRITE_TRAN_CONTINUE; | |
587 | ||
588 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
589 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
590 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
591 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
592 | st->hand_state = TLS_ST_EARLY_DATA; |
593 | } else { | |
61ae935a | 594 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 595 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc MC |
596 | #else |
597 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) | |
598 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
599 | else | |
600 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 601 | #endif |
066904cc | 602 | } |
a230b26e | 603 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
604 | |
605 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
606 | case TLS_ST_CW_NEXT_PROTO: |
607 | st->hand_state = TLS_ST_CW_FINISHED; | |
608 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
609 | #endif |
610 | ||
a230b26e EK |
611 | case TLS_ST_CW_FINISHED: |
612 | if (s->hit) { | |
613 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
614 | return WRITE_TRAN_CONTINUE; |
615 | } else { | |
616 | return WRITE_TRAN_FINISHED; | |
617 | } | |
61ae935a | 618 | |
a230b26e EK |
619 | case TLS_ST_CR_FINISHED: |
620 | if (s->hit) { | |
621 | st->hand_state = TLS_ST_CW_CHANGE; | |
622 | return WRITE_TRAN_CONTINUE; | |
623 | } else { | |
624 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
625 | return WRITE_TRAN_CONTINUE; |
626 | } | |
c7f47786 MC |
627 | |
628 | case TLS_ST_CR_HELLO_REQ: | |
629 | /* | |
630 | * If we can renegotiate now then do so, otherwise wait for a more | |
631 | * convenient time. | |
632 | */ | |
633 | if (ssl3_renegotiate_check(s, 1)) { | |
634 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 635 | /* SSLfatal() already called */ |
c7f47786 MC |
636 | return WRITE_TRAN_ERROR; |
637 | } | |
638 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
639 | return WRITE_TRAN_CONTINUE; | |
640 | } | |
641 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 642 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
643 | } |
644 | } | |
645 | ||
646 | /* | |
647 | * Perform any pre work that needs to be done prior to sending a message from | |
648 | * the client to the server. | |
649 | */ | |
8481f583 | 650 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 651 | { |
d6f1a6e9 | 652 | OSSL_STATEM *st = &s->statem; |
61ae935a | 653 | |
a230b26e | 654 | switch (st->hand_state) { |
f3b3d7f0 RS |
655 | default: |
656 | /* No pre work to be done */ | |
657 | break; | |
658 | ||
61ae935a MC |
659 | case TLS_ST_CW_CLNT_HELLO: |
660 | s->shutdown = 0; | |
661 | if (SSL_IS_DTLS(s)) { | |
662 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 663 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 664 | /* SSLfatal() already called */ |
2c4a056f MC |
665 | return WORK_ERROR; |
666 | } | |
61ae935a MC |
667 | } |
668 | break; | |
669 | ||
61ae935a MC |
670 | case TLS_ST_CW_CHANGE: |
671 | if (SSL_IS_DTLS(s)) { | |
672 | if (s->hit) { | |
673 | /* | |
674 | * We're into the last flight so we don't retransmit these | |
675 | * messages unless we need to. | |
676 | */ | |
677 | st->use_timer = 0; | |
678 | } | |
679 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
680 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
681 | /* Calls SSLfatal() as required */ | |
61ae935a | 682 | return dtls_wait_for_dry(s); |
a2c2e000 | 683 | } |
61ae935a MC |
684 | #endif |
685 | } | |
f3b3d7f0 | 686 | break; |
61ae935a | 687 | |
d7f8783f | 688 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
689 | /* |
690 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
691 | * attempt to write early data before calling SSL_read() then we press | |
692 | * on with the handshake. Otherwise we pause here. | |
693 | */ | |
694 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
695 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
696 | return WORK_FINISHED_CONTINUE; | |
697 | /* Fall through */ | |
698 | ||
699 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
700 | return tls_finish_handshake(s, wst, 0, 1); |
701 | ||
61ae935a | 702 | case TLS_ST_OK: |
a2c2e000 | 703 | /* Calls SSLfatal() as required */ |
2a8db717 | 704 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
705 | } |
706 | ||
707 | return WORK_FINISHED_CONTINUE; | |
708 | } | |
709 | ||
710 | /* | |
711 | * Perform any work that needs to be done after sending a message from the | |
712 | * client to the server. | |
713 | */ | |
8481f583 | 714 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 715 | { |
d6f1a6e9 | 716 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
717 | |
718 | s->init_num = 0; | |
719 | ||
a230b26e | 720 | switch (st->hand_state) { |
f3b3d7f0 RS |
721 | default: |
722 | /* No post work to be done */ | |
723 | break; | |
724 | ||
61ae935a | 725 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 726 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 727 | && s->max_early_data > 0) { |
6cb42265 MC |
728 | /* |
729 | * We haven't selected TLSv1.3 yet so we don't call the change | |
730 | * cipher state function associated with the SSL_METHOD. Instead | |
731 | * we call tls13_change_cipher_state() directly. | |
732 | */ | |
5cc807da | 733 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
734 | if (!tls13_change_cipher_state(s, |
735 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
736 | /* SSLfatal() already called */ | |
737 | return WORK_ERROR; | |
738 | } | |
a2c2e000 | 739 | } |
5cc807da MC |
740 | /* else we're in compat mode so we delay flushing until after CCS */ |
741 | } else if (!statem_flush(s)) { | |
742 | return WORK_MORE_A; | |
743 | } | |
744 | ||
745 | if (SSL_IS_DTLS(s)) { | |
746 | /* Treat the next message as the first packet */ | |
747 | s->first_packet = 1; | |
6cb42265 | 748 | } |
61ae935a MC |
749 | break; |
750 | ||
ef6c191b MC |
751 | case TLS_ST_CW_END_OF_EARLY_DATA: |
752 | /* | |
753 | * We set the enc_write_ctx back to NULL because we may end up writing | |
754 | * in cleartext again if we get a HelloRetryRequest from the server. | |
755 | */ | |
756 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
757 | s->enc_write_ctx = NULL; | |
758 | break; | |
759 | ||
61ae935a | 760 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
761 | if (tls_client_key_exchange_post_work(s) == 0) { |
762 | /* SSLfatal() already called */ | |
61ae935a | 763 | return WORK_ERROR; |
a2c2e000 | 764 | } |
61ae935a MC |
765 | break; |
766 | ||
767 | case TLS_ST_CW_CHANGE: | |
318d3c0e | 768 | if (SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING) |
4d02f870 | 769 | break; |
066904cc MC |
770 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
771 | && s->max_early_data > 0) { | |
772 | /* | |
773 | * We haven't selected TLSv1.3 yet so we don't call the change | |
774 | * cipher state function associated with the SSL_METHOD. Instead | |
775 | * we call tls13_change_cipher_state() directly. | |
776 | */ | |
777 | if (!tls13_change_cipher_state(s, | |
778 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
779 | return WORK_ERROR; | |
780 | break; | |
781 | } | |
61ae935a MC |
782 | s->session->cipher = s->s3->tmp.new_cipher; |
783 | #ifdef OPENSSL_NO_COMP | |
784 | s->session->compress_meth = 0; | |
785 | #else | |
786 | if (s->s3->tmp.new_compression == NULL) | |
787 | s->session->compress_meth = 0; | |
788 | else | |
789 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
790 | #endif | |
a2c2e000 MC |
791 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
792 | /* SSLfatal() already called */ | |
61ae935a | 793 | return WORK_ERROR; |
a2c2e000 | 794 | } |
61ae935a MC |
795 | |
796 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
797 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
798 | /* SSLfatal() already called */ | |
61ae935a | 799 | return WORK_ERROR; |
a2c2e000 | 800 | } |
61ae935a MC |
801 | |
802 | if (SSL_IS_DTLS(s)) { | |
803 | #ifndef OPENSSL_NO_SCTP | |
804 | if (s->hit) { | |
805 | /* | |
806 | * Change to new shared key of SCTP-Auth, will be ignored if | |
807 | * no SCTP used. | |
808 | */ | |
809 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
810 | 0, NULL); | |
811 | } | |
812 | #endif | |
813 | ||
814 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
815 | } | |
816 | break; | |
817 | ||
818 | case TLS_ST_CW_FINISHED: | |
819 | #ifndef OPENSSL_NO_SCTP | |
820 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
821 | /* | |
822 | * Change to new shared key of SCTP-Auth, will be ignored if | |
823 | * no SCTP used. | |
824 | */ | |
825 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
826 | 0, NULL); | |
827 | } | |
828 | #endif | |
829 | if (statem_flush(s) != 1) | |
830 | return WORK_MORE_B; | |
92760c21 MC |
831 | |
832 | if (SSL_IS_TLS13(s)) { | |
9d75dce3 | 833 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
834 | /* SSLfatal() already called */ |
835 | return WORK_ERROR; | |
836 | } | |
9d75dce3 TS |
837 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
838 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
839 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
840 | /* SSLfatal() already called */ | |
841 | return WORK_ERROR; | |
842 | } | |
843 | } | |
92760c21 | 844 | } |
61ae935a | 845 | break; |
9412b3ad MC |
846 | |
847 | case TLS_ST_CW_KEY_UPDATE: | |
848 | if (statem_flush(s) != 1) | |
849 | return WORK_MORE_A; | |
a2c2e000 MC |
850 | if (!tls13_update_key(s, 1)) { |
851 | /* SSLfatal() already called */ | |
57389a32 | 852 | return WORK_ERROR; |
a2c2e000 | 853 | } |
9412b3ad | 854 | break; |
61ae935a MC |
855 | } |
856 | ||
857 | return WORK_FINISHED_CONTINUE; | |
858 | } | |
859 | ||
860 | /* | |
6392fb8e MC |
861 | * Get the message construction function and message type for sending from the |
862 | * client | |
61ae935a MC |
863 | * |
864 | * Valid return values are: | |
865 | * 1: Success | |
866 | * 0: Error | |
867 | */ | |
6392fb8e | 868 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 869 | confunc_f *confunc, int *mt) |
61ae935a | 870 | { |
d6f1a6e9 | 871 | OSSL_STATEM *st = &s->statem; |
61ae935a | 872 | |
4a01c59f MC |
873 | switch (st->hand_state) { |
874 | default: | |
875 | /* Shouldn't happen */ | |
f63a17d6 MC |
876 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
877 | SSL_F_OSSL_STATEM_CLIENT_CONSTRUCT_MESSAGE, | |
878 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
879 | return 0; |
880 | ||
881 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 882 | if (SSL_IS_DTLS(s)) |
6392fb8e | 883 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 884 | else |
6392fb8e MC |
885 | *confunc = tls_construct_change_cipher_spec; |
886 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
887 | break; |
888 | ||
889 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
890 | *confunc = tls_construct_client_hello; |
891 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
892 | break; |
893 | ||
ef6c191b MC |
894 | case TLS_ST_CW_END_OF_EARLY_DATA: |
895 | *confunc = tls_construct_end_of_early_data; | |
896 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
897 | break; | |
898 | ||
899 | case TLS_ST_PENDING_EARLY_DATA_END: | |
900 | *confunc = NULL; | |
901 | *mt = SSL3_MT_DUMMY; | |
902 | break; | |
903 | ||
4a01c59f | 904 | case TLS_ST_CW_CERT: |
6392fb8e MC |
905 | *confunc = tls_construct_client_certificate; |
906 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
907 | break; |
908 | ||
909 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
910 | *confunc = tls_construct_client_key_exchange; |
911 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
912 | break; |
913 | ||
914 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 915 | *confunc = tls_construct_cert_verify; |
6392fb8e | 916 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 917 | break; |
61ae935a MC |
918 | |
919 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 920 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
921 | *confunc = tls_construct_next_proto; |
922 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 923 | break; |
61ae935a | 924 | #endif |
4a01c59f | 925 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
926 | *confunc = tls_construct_finished; |
927 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 928 | break; |
9412b3ad MC |
929 | |
930 | case TLS_ST_CW_KEY_UPDATE: | |
931 | *confunc = tls_construct_key_update; | |
932 | *mt = SSL3_MT_KEY_UPDATE; | |
933 | break; | |
4a01c59f | 934 | } |
5923ad4b | 935 | |
5923ad4b | 936 | return 1; |
61ae935a MC |
937 | } |
938 | ||
939 | /* | |
940 | * Returns the maximum allowed length for the current message that we are | |
941 | * reading. Excludes the message header. | |
942 | */ | |
eda75751 | 943 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 944 | { |
d6f1a6e9 | 945 | OSSL_STATEM *st = &s->statem; |
61ae935a | 946 | |
a230b26e | 947 | switch (st->hand_state) { |
f3b3d7f0 RS |
948 | default: |
949 | /* Shouldn't happen */ | |
950 | return 0; | |
951 | ||
a230b26e EK |
952 | case TLS_ST_CR_SRVR_HELLO: |
953 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 954 | |
a230b26e EK |
955 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
956 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 957 | |
a230b26e EK |
958 | case TLS_ST_CR_CERT: |
959 | return s->max_cert_list; | |
61ae935a | 960 | |
2c5dfdc3 MC |
961 | case TLS_ST_CR_CERT_VRFY: |
962 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
963 | ||
a230b26e EK |
964 | case TLS_ST_CR_CERT_STATUS: |
965 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 966 | |
a230b26e EK |
967 | case TLS_ST_CR_KEY_EXCH: |
968 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 969 | |
a230b26e EK |
970 | case TLS_ST_CR_CERT_REQ: |
971 | /* | |
972 | * Set to s->max_cert_list for compatibility with previous releases. In | |
973 | * practice these messages can get quite long if servers are configured | |
974 | * to provide a long list of acceptable CAs | |
975 | */ | |
976 | return s->max_cert_list; | |
61ae935a | 977 | |
a230b26e EK |
978 | case TLS_ST_CR_SRVR_DONE: |
979 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 980 | |
a230b26e EK |
981 | case TLS_ST_CR_CHANGE: |
982 | if (s->version == DTLS1_BAD_VER) | |
983 | return 3; | |
984 | return CCS_MAX_LENGTH; | |
61ae935a | 985 | |
a230b26e EK |
986 | case TLS_ST_CR_SESSION_TICKET: |
987 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 988 | |
a230b26e EK |
989 | case TLS_ST_CR_FINISHED: |
990 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
991 | |
992 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
993 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
994 | |
995 | case TLS_ST_CR_KEY_UPDATE: | |
996 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 997 | } |
61ae935a MC |
998 | } |
999 | ||
1000 | /* | |
1001 | * Process a message that the client has been received from the server. | |
1002 | */ | |
8481f583 | 1003 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 1004 | { |
d6f1a6e9 | 1005 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1006 | |
a230b26e | 1007 | switch (st->hand_state) { |
f3b3d7f0 RS |
1008 | default: |
1009 | /* Shouldn't happen */ | |
a2c2e000 MC |
1010 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1011 | SSL_F_OSSL_STATEM_CLIENT_PROCESS_MESSAGE, | |
1012 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1013 | return MSG_PROCESS_ERROR; |
1014 | ||
a230b26e EK |
1015 | case TLS_ST_CR_SRVR_HELLO: |
1016 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1017 | |
a230b26e EK |
1018 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1019 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1020 | |
a230b26e EK |
1021 | case TLS_ST_CR_CERT: |
1022 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1023 | |
2c5dfdc3 MC |
1024 | case TLS_ST_CR_CERT_VRFY: |
1025 | return tls_process_cert_verify(s, pkt); | |
1026 | ||
a230b26e EK |
1027 | case TLS_ST_CR_CERT_STATUS: |
1028 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1029 | |
a230b26e EK |
1030 | case TLS_ST_CR_KEY_EXCH: |
1031 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1032 | |
a230b26e EK |
1033 | case TLS_ST_CR_CERT_REQ: |
1034 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1035 | |
a230b26e EK |
1036 | case TLS_ST_CR_SRVR_DONE: |
1037 | return tls_process_server_done(s, pkt); | |
61ae935a | 1038 | |
a230b26e EK |
1039 | case TLS_ST_CR_CHANGE: |
1040 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1041 | |
a230b26e EK |
1042 | case TLS_ST_CR_SESSION_TICKET: |
1043 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1044 | |
a230b26e EK |
1045 | case TLS_ST_CR_FINISHED: |
1046 | return tls_process_finished(s, pkt); | |
e46f2334 | 1047 | |
c7f47786 MC |
1048 | case TLS_ST_CR_HELLO_REQ: |
1049 | return tls_process_hello_req(s, pkt); | |
1050 | ||
e46f2334 MC |
1051 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1052 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1053 | |
1054 | case TLS_ST_CR_KEY_UPDATE: | |
1055 | return tls_process_key_update(s, pkt); | |
61ae935a | 1056 | } |
61ae935a MC |
1057 | } |
1058 | ||
1059 | /* | |
1060 | * Perform any further processing required following the receipt of a message | |
1061 | * from the server | |
1062 | */ | |
8481f583 | 1063 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1064 | { |
d6f1a6e9 | 1065 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1066 | |
a230b26e | 1067 | switch (st->hand_state) { |
f3b3d7f0 RS |
1068 | default: |
1069 | /* Shouldn't happen */ | |
a2c2e000 MC |
1070 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1071 | SSL_F_OSSL_STATEM_CLIENT_POST_PROCESS_MESSAGE, | |
1072 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1073 | return WORK_ERROR; |
1074 | ||
05c4f1d5 MC |
1075 | case TLS_ST_CR_CERT_REQ: |
1076 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1077 | } |
61ae935a MC |
1078 | } |
1079 | ||
7cea05dc | 1080 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1081 | { |
2c7b4dbc | 1082 | unsigned char *p; |
ec60ccc1 MC |
1083 | size_t sess_id_len; |
1084 | int i, protverr; | |
09b6c2ef | 1085 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1086 | SSL_COMP *comp; |
1087 | #endif | |
b9908bf9 | 1088 | SSL_SESSION *sess = s->session; |
a5816a5a | 1089 | unsigned char *session_id; |
0f113f3e | 1090 | |
7cea05dc | 1091 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc | 1092 | /* Should not happen */ |
f63a17d6 MC |
1093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1094 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1095 | return 0; |
2c7b4dbc | 1096 | } |
0f113f3e | 1097 | |
b9908bf9 | 1098 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1099 | protverr = ssl_set_client_hello_version(s); |
1100 | if (protverr != 0) { | |
f63a17d6 MC |
1101 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1102 | protverr); | |
7cea05dc | 1103 | return 0; |
4fa52141 | 1104 | } |
0f113f3e | 1105 | |
e586eac8 MC |
1106 | if (sess == NULL |
1107 | || !ssl_version_supported(s, sess->ssl_version) | |
1108 | || !SSL_SESSION_is_resumable(sess)) { | |
fc7129dc MC |
1109 | if (s->hello_retry_request == SSL_HRR_NONE |
1110 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1111 | /* SSLfatal() already called */ |
7cea05dc | 1112 | return 0; |
f63a17d6 | 1113 | } |
b9908bf9 MC |
1114 | } |
1115 | /* else use the pre-loaded session */ | |
0f113f3e | 1116 | |
b9908bf9 | 1117 | p = s->s3->client_random; |
0f113f3e | 1118 | |
b9908bf9 MC |
1119 | /* |
1120 | * for DTLS if client_random is initialized, reuse it, we are | |
1121 | * required to use same upon reply to HelloVerify | |
1122 | */ | |
1123 | if (SSL_IS_DTLS(s)) { | |
1124 | size_t idx; | |
1125 | i = 1; | |
1126 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1127 | if (p[idx]) { | |
1128 | i = 0; | |
1129 | break; | |
0f113f3e | 1130 | } |
0f113f3e | 1131 | } |
751b26b1 | 1132 | } else { |
fc7129dc | 1133 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1134 | } |
0f113f3e | 1135 | |
f7f2a01d | 1136 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
f63a17d6 MC |
1137 | DOWNGRADE_NONE) <= 0) { |
1138 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1139 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1140 | return 0; |
f63a17d6 | 1141 | } |
b9908bf9 | 1142 | |
b9908bf9 MC |
1143 | /*- |
1144 | * version indicates the negotiated version: for example from | |
1145 | * an SSLv2/v3 compatible client hello). The client_version | |
1146 | * field is the maximum version we permit and it is also | |
1147 | * used in RSA encrypted premaster secrets. Some servers can | |
1148 | * choke if we initially report a higher version then | |
1149 | * renegotiate to a lower one in the premaster secret. This | |
1150 | * didn't happen with TLS 1.0 as most servers supported it | |
1151 | * but it can with TLS 1.1 or later if the server only supports | |
1152 | * 1.0. | |
1153 | * | |
1154 | * Possible scenario with previous logic: | |
1155 | * 1. Client hello indicates TLS 1.2 | |
1156 | * 2. Server hello says TLS 1.0 | |
1157 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1158 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1159 | * 5. Server sends hello request to renegotiate. |
1160 | * 6. Client hello indicates TLS v1.0 as we now | |
1161 | * know that is maximum server supports. | |
1162 | * 7. Server chokes on RSA encrypted premaster secret | |
1163 | * containing version 1.0. | |
1164 | * | |
1165 | * For interoperability it should be OK to always use the | |
1166 | * maximum version we support in client hello and then rely | |
1167 | * on the checking of version to ensure the servers isn't | |
1168 | * being inconsistent: for example initially negotiating with | |
1169 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1170 | * client_version in client hello and not resetting it to | |
1171 | * the negotiated version. | |
cd998837 MC |
1172 | * |
1173 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1174 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1175 | */ |
7acb8b64 | 1176 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1177 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
1178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1179 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1180 | return 0; |
2c7b4dbc | 1181 | } |
b9908bf9 MC |
1182 | |
1183 | /* Session ID */ | |
a5816a5a MC |
1184 | session_id = s->session->session_id; |
1185 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1186 | if (s->version == TLS1_3_VERSION | |
1187 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1188 | sess_id_len = sizeof(s->tmp_session_id); | |
1189 | s->tmp_session_id_len = sess_id_len; | |
1190 | session_id = s->tmp_session_id; | |
fc7129dc | 1191 | if (s->hello_retry_request == SSL_HRR_NONE |
16cfc2c9 | 1192 | && RAND_bytes(s->tmp_session_id, sess_id_len) <= 0) { |
a5816a5a MC |
1193 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1194 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1195 | ERR_R_INTERNAL_ERROR); | |
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)) { |
f63a17d6 MC |
1213 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1214 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1215 | return 0; |
b9908bf9 | 1216 | } |
0f113f3e | 1217 | |
b9908bf9 MC |
1218 | /* cookie stuff for DTLS */ |
1219 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1220 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1221 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1222 | s->d1->cookie_len)) { |
f63a17d6 MC |
1223 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1224 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1225 | return 0; |
0f113f3e | 1226 | } |
b9908bf9 MC |
1227 | } |
1228 | ||
1229 | /* Ciphers supported */ | |
7cea05dc | 1230 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1231 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1232 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1233 | return 0; |
2c7b4dbc | 1234 | } |
635c8f77 | 1235 | |
f63a17d6 MC |
1236 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1237 | /* SSLfatal() already called */ | |
7cea05dc | 1238 | return 0; |
f63a17d6 | 1239 | } |
7cea05dc | 1240 | if (!WPACKET_close(pkt)) { |
f63a17d6 MC |
1241 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1242 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1243 | return 0; |
b9908bf9 | 1244 | } |
0f113f3e | 1245 | |
b9908bf9 | 1246 | /* COMPRESSION */ |
7cea05dc | 1247 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
f63a17d6 MC |
1248 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1249 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1250 | return 0; |
2c7b4dbc MC |
1251 | } |
1252 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1253 | if (ssl_allow_compression(s) |
1254 | && s->ctx->comp_methods | |
1255 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1256 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1257 | for (i = 0; i < compnum; i++) { | |
1258 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1259 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
f63a17d6 MC |
1260 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1261 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1262 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1263 | return 0; |
2c7b4dbc MC |
1264 | } |
1265 | } | |
b9908bf9 | 1266 | } |
09b6c2ef | 1267 | #endif |
2c7b4dbc | 1268 | /* Add the NULL method */ |
7cea05dc | 1269 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1270 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1271 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1272 | return 0; |
2c7b4dbc | 1273 | } |
761772d7 | 1274 | |
b9908bf9 | 1275 | /* TLS extensions */ |
f63a17d6 MC |
1276 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1277 | /* SSLfatal() already called */ | |
7cea05dc | 1278 | return 0; |
b9908bf9 | 1279 | } |
0f113f3e | 1280 | |
b9908bf9 | 1281 | return 1; |
0f113f3e | 1282 | } |
d02b48c6 | 1283 | |
be3583fa | 1284 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1285 | { |
cb150cbc | 1286 | size_t cookie_len; |
8ba708e5 MC |
1287 | PACKET cookiepkt; |
1288 | ||
1289 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1290 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
f63a17d6 MC |
1291 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1292 | SSL_R_LENGTH_MISMATCH); | |
1293 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1294 | } |
1295 | ||
1296 | cookie_len = PACKET_remaining(&cookiepkt); | |
1297 | if (cookie_len > sizeof(s->d1->cookie)) { | |
f63a17d6 MC |
1298 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1299 | SSL_R_LENGTH_TOO_LONG); | |
1300 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1301 | } |
1302 | ||
1303 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
f63a17d6 MC |
1304 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1305 | SSL_R_LENGTH_MISMATCH); | |
1306 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1307 | } |
1308 | s->d1->cookie_len = cookie_len; | |
1309 | ||
1310 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1311 | } |
1312 | ||
11c67eea | 1313 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1314 | { |
1315 | STACK_OF(SSL_CIPHER) *sk; | |
1316 | const SSL_CIPHER *c; | |
11c67eea MC |
1317 | int i; |
1318 | ||
1319 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1320 | if (c == NULL) { | |
1321 | /* unknown cipher */ | |
f63a17d6 MC |
1322 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1323 | SSL_R_UNKNOWN_CIPHER_RETURNED); | |
11c67eea MC |
1324 | return 0; |
1325 | } | |
1326 | /* | |
1327 | * If it is a disabled cipher we either didn't send it in client hello, | |
1328 | * or it's not allowed for the selected protocol. So we return an error. | |
1329 | */ | |
8af91fd9 | 1330 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
f63a17d6 MC |
1331 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1332 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1333 | return 0; |
1334 | } | |
1335 | ||
1336 | sk = ssl_get_ciphers_by_id(s); | |
1337 | i = sk_SSL_CIPHER_find(sk, c); | |
1338 | if (i < 0) { | |
1339 | /* we did not say we would use this cipher */ | |
f63a17d6 MC |
1340 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1341 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1342 | return 0; |
1343 | } | |
1344 | ||
1345 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1346 | && s->s3->tmp.new_cipher->id != c->id) { | |
1347 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
f63a17d6 MC |
1348 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1349 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1350 | return 0; |
1351 | } | |
1352 | ||
1353 | /* | |
1354 | * Depending on the session caching (internal/external), the cipher | |
1355 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1356 | * set and use it for comparison. | |
1357 | */ | |
1358 | if (s->session->cipher != NULL) | |
1359 | s->session->cipher_id = s->session->cipher->id; | |
1360 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1361 | if (SSL_IS_TLS13(s)) { |
1362 | /* | |
1363 | * In TLSv1.3 it is valid for the server to select a different | |
1364 | * ciphersuite as long as the hash is the same. | |
1365 | */ | |
1366 | if (ssl_md(c->algorithm2) | |
1367 | != ssl_md(s->session->cipher->algorithm2)) { | |
f63a17d6 MC |
1368 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1369 | SSL_F_SET_CLIENT_CIPHERSUITE, | |
1370 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
a055a881 MC |
1371 | return 0; |
1372 | } | |
1373 | } else { | |
1374 | /* | |
1375 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1376 | * ciphersuite. | |
1377 | */ | |
f63a17d6 MC |
1378 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1379 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
a055a881 MC |
1380 | return 0; |
1381 | } | |
11c67eea MC |
1382 | } |
1383 | s->s3->tmp.new_cipher = c; | |
1384 | ||
1385 | return 1; | |
1386 | } | |
1387 | ||
1388 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1389 | { | |
332eb390 | 1390 | PACKET session_id, extpkt; |
b9908bf9 | 1391 | size_t session_id_len; |
b6981744 | 1392 | const unsigned char *cipherchars; |
597c51bc | 1393 | int hrr = 0; |
b9908bf9 | 1394 | unsigned int compression; |
4fa52141 | 1395 | unsigned int sversion; |
3434f40b | 1396 | unsigned int context; |
29bfd5b7 | 1397 | int discard; |
332eb390 | 1398 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1399 | #ifndef OPENSSL_NO_COMP |
1400 | SSL_COMP *comp; | |
1401 | #endif | |
1402 | ||
4fa52141 | 1403 | if (!PACKET_get_net_2(pkt, &sversion)) { |
f63a17d6 MC |
1404 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1405 | SSL_R_LENGTH_MISMATCH); | |
1406 | goto err; | |
4fa52141 | 1407 | } |
50932c4a | 1408 | |
c3043dcd | 1409 | /* load the server random */ |
597c51bc MC |
1410 | if (s->version == TLS1_3_VERSION |
1411 | && sversion == TLS1_2_VERSION | |
1412 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1413 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
fc7129dc MC |
1414 | s->hello_retry_request = SSL_HRR_PENDING; |
1415 | hrr = 1; | |
597c51bc MC |
1416 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
1417 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1418 | SSL_R_LENGTH_MISMATCH); | |
1419 | goto err; | |
1420 | } | |
1421 | } else { | |
1422 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
1423 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1424 | SSL_R_LENGTH_MISMATCH); | |
1425 | goto err; | |
1426 | } | |
c3043dcd MC |
1427 | } |
1428 | ||
88050dd1 MC |
1429 | /* Get the session-id. */ |
1430 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1431 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1432 | SSL_R_LENGTH_MISMATCH); | |
f63a17d6 | 1433 | goto err; |
0f113f3e | 1434 | } |
88050dd1 MC |
1435 | session_id_len = PACKET_remaining(&session_id); |
1436 | if (session_id_len > sizeof(s->session->session_id) | |
1437 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1438 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1439 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
f63a17d6 | 1440 | goto err; |
524420d8 MC |
1441 | } |
1442 | ||
73999b62 | 1443 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1444 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1445 | SSL_R_LENGTH_MISMATCH); | |
1446 | goto err; | |
fc5ce51d EK |
1447 | } |
1448 | ||
88050dd1 MC |
1449 | if (!PACKET_get_1(pkt, &compression)) { |
1450 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1451 | SSL_R_LENGTH_MISMATCH); | |
1452 | goto err; | |
4ff65f77 MC |
1453 | } |
1454 | ||
1455 | /* TLS extensions */ | |
597c51bc | 1456 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1457 | PACKET_null_init(&extpkt); |
26b9172a MC |
1458 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1459 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1460 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1461 | SSL_R_BAD_LENGTH); | |
1462 | goto err; | |
4ff65f77 MC |
1463 | } |
1464 | ||
597c51bc MC |
1465 | if (!hrr) { |
1466 | if (!tls_collect_extensions(s, &extpkt, | |
1467 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1468 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1469 | &extensions, NULL, 1)) { | |
1470 | /* SSLfatal() already called */ | |
1471 | goto err; | |
1472 | } | |
1473 | ||
1474 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1475 | /* SSLfatal() already called */ | |
1476 | goto err; | |
1477 | } | |
88050dd1 MC |
1478 | } |
1479 | ||
597c51bc MC |
1480 | if (SSL_IS_TLS13(s) || hrr) { |
1481 | if (compression != 0) { | |
1482 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1483 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1484 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1485 | goto err; | |
1486 | } | |
1487 | ||
1488 | if (session_id_len != s->tmp_session_id_len | |
1489 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1490 | session_id_len) != 0) { | |
1491 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1492 | SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INVALID_SESSION_ID); | |
1493 | goto err; | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | if (hrr) { | |
1498 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1499 | /* SSLfatal() already called */ | |
1500 | goto err; | |
1501 | } | |
1502 | ||
1503 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1504 | } |
1505 | ||
1506 | /* | |
1507 | * Now we have chosen the version we need to check again that the extensions | |
1508 | * are appropriate for this version. | |
1509 | */ | |
fe874d27 MC |
1510 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1511 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 MC |
1512 | if (!tls_validate_all_contexts(s, context, extensions)) { |
1513 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1514 | SSL_R_BAD_EXTENSION); | |
1515 | goto err; | |
1516 | } | |
1517 | ||
4ff65f77 MC |
1518 | s->hit = 0; |
1519 | ||
1520 | if (SSL_IS_TLS13(s)) { | |
a5816a5a MC |
1521 | /* |
1522 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1523 | * the message must be on a record boundary. | |
1524 | */ | |
1525 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1526 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
1527 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1528 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1529 | goto err; | |
1530 | } | |
1531 | ||
4ff65f77 MC |
1532 | /* This will set s->hit if we are resuming */ |
1533 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1534 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1535 | extensions, NULL, 0)) { |
f63a17d6 MC |
1536 | /* SSLfatal() already called */ |
1537 | goto err; | |
1538 | } | |
4ff65f77 | 1539 | } else { |
8c1a5343 | 1540 | /* |
4ff65f77 MC |
1541 | * Check if we can resume the session based on external pre-shared |
1542 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1543 | * Resumption based on server-side state works with session IDs. | |
1544 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1545 | * works by overriding the SessionTicket extension at the application | |
1546 | * layer, and does not send a session ID. (We do not know whether | |
1547 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1548 | * ID alone is not a reliable indicator of session resumption, so we | |
1549 | * first check if we can resume, and later peek at the next handshake | |
1550 | * message to see if the server wants to resume. | |
8c1a5343 | 1551 | */ |
4ff65f77 MC |
1552 | if (s->version >= TLS1_VERSION |
1553 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1554 | const SSL_CIPHER *pref_cipher = NULL; | |
1555 | /* | |
1556 | * s->session->master_key_length is a size_t, but this is an int for | |
1557 | * backwards compat reasons | |
1558 | */ | |
1559 | int master_key_length; | |
1560 | master_key_length = sizeof(s->session->master_key); | |
1561 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1562 | &master_key_length, | |
1563 | NULL, &pref_cipher, | |
1564 | s->ext.session_secret_cb_arg) | |
1565 | && master_key_length > 0) { | |
1566 | s->session->master_key_length = master_key_length; | |
1567 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1568 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1569 | } else { |
f63a17d6 MC |
1570 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1571 | SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1572 | goto err; | |
4ff65f77 | 1573 | } |
0f113f3e | 1574 | } |
4ff65f77 MC |
1575 | |
1576 | if (session_id_len != 0 | |
1577 | && session_id_len == s->session->session_id_length | |
1578 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1579 | session_id_len) == 0) | |
1580 | s->hit = 1; | |
50932c4a MC |
1581 | } |
1582 | ||
4ff65f77 | 1583 | if (s->hit) { |
0f113f3e | 1584 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1585 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1586 | /* actually a client application bug */ |
f63a17d6 MC |
1587 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1588 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1589 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1590 | goto err; | |
0f113f3e | 1591 | } |
6e3d0153 | 1592 | } else { |
0f113f3e | 1593 | /* |
6e3d0153 | 1594 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1595 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1596 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1597 | * so the PAC-based session secret is always preserved. It'll be | |
1598 | * overwritten if the server refuses resumption. | |
0f113f3e | 1599 | */ |
4ff65f77 MC |
1600 | if (s->session->session_id_length > 0 |
1601 | || (SSL_IS_TLS13(s) | |
1602 | && s->session->ext.tick_identity | |
1603 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
0e6161bc BK |
1604 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_miss, 1, &discard, |
1605 | s->session_ctx->lock); | |
0f113f3e | 1606 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1607 | /* SSLfatal() already called */ |
1608 | goto err; | |
0f113f3e MC |
1609 | } |
1610 | } | |
50932c4a | 1611 | |
ccae4a15 | 1612 | s->session->ssl_version = s->version; |
a5816a5a MC |
1613 | /* |
1614 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1615 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1616 | * echo of what we originally sent in the ClientHello and should not be | |
1617 | * used for resumption. | |
1618 | */ | |
1619 | if (!SSL_IS_TLS13(s)) { | |
1620 | s->session->session_id_length = session_id_len; | |
1621 | /* session_id_len could be 0 */ | |
1622 | if (session_id_len > 0) | |
1623 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1624 | session_id_len); | |
1625 | } | |
0f113f3e | 1626 | } |
fc5ce51d | 1627 | |
ccae4a15 FI |
1628 | /* Session version and negotiated protocol version should match */ |
1629 | if (s->version != s->session->ssl_version) { | |
f63a17d6 MC |
1630 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1631 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1632 | goto err; | |
ccae4a15 | 1633 | } |
0f113f3e | 1634 | /* |
3eb2aff4 KR |
1635 | * Now that we know the version, update the check to see if it's an allowed |
1636 | * version. | |
1637 | */ | |
1638 | s->s3->tmp.min_ver = s->version; | |
1639 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1640 | |
11c67eea | 1641 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1642 | /* SSLfatal() already called */ |
1643 | goto err; | |
0f113f3e MC |
1644 | } |
1645 | ||
09b6c2ef | 1646 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1647 | if (compression != 0) { |
f63a17d6 MC |
1648 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1649 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1650 | goto err; | |
0f113f3e MC |
1651 | } |
1652 | /* | |
1653 | * If compression is disabled we'd better not try to resume a session | |
1654 | * using compression. | |
1655 | */ | |
1656 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
1657 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1658 | SSL_R_INCONSISTENT_COMPRESSION); | |
1659 | goto err; | |
0f113f3e | 1660 | } |
09b6c2ef | 1661 | #else |
fc5ce51d | 1662 | if (s->hit && compression != s->session->compress_meth) { |
f63a17d6 | 1663 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
dd5a4279 | 1664 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1665 | goto err; |
0f113f3e | 1666 | } |
fc5ce51d | 1667 | if (compression == 0) |
0f113f3e MC |
1668 | comp = NULL; |
1669 | else if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1670 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1671 | SSL_R_COMPRESSION_DISABLED); | |
1672 | goto err; | |
fc5ce51d EK |
1673 | } else { |
1674 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1675 | } | |
0f113f3e | 1676 | |
fc5ce51d | 1677 | if (compression != 0 && comp == NULL) { |
f63a17d6 MC |
1678 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1679 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1680 | goto err; | |
0f113f3e MC |
1681 | } else { |
1682 | s->s3->tmp.new_compression = comp; | |
1683 | } | |
09b6c2ef | 1684 | #endif |
761772d7 | 1685 | |
f63a17d6 MC |
1686 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1687 | /* SSLfatal() already called */ | |
1688 | goto err; | |
1689 | } | |
332eb390 | 1690 | |
8723588e MC |
1691 | #ifndef OPENSSL_NO_SCTP |
1692 | if (SSL_IS_DTLS(s) && s->hit) { | |
1693 | unsigned char sctpauthkey[64]; | |
1694 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1695 | ||
1696 | /* | |
1697 | * Add new shared key for SCTP-Auth, will be ignored if | |
1698 | * no SCTP used. | |
1699 | */ | |
141eb8c6 MC |
1700 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1701 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1702 | |
1703 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1704 | sizeof(sctpauthkey), |
1705 | labelbuffer, | |
f63a17d6 MC |
1706 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
1707 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1708 | ERR_R_INTERNAL_ERROR); | |
1709 | goto err; | |
1710 | } | |
8723588e MC |
1711 | |
1712 | BIO_ctrl(SSL_get_wbio(s), | |
1713 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1714 | sizeof(sctpauthkey), sctpauthkey); | |
1715 | } | |
1716 | #endif | |
1717 | ||
92760c21 MC |
1718 | /* |
1719 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1720 | * we're done with this message | |
1721 | */ | |
1722 | if (SSL_IS_TLS13(s) | |
1723 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1724 | || !s->method->ssl3_enc->change_cipher_state(s, |
1725 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1726 | /* SSLfatal() already called */ |
1727 | goto err; | |
92760c21 MC |
1728 | } |
1729 | ||
1b0286a3 | 1730 | OPENSSL_free(extensions); |
b9908bf9 | 1731 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1732 | err: |
1b0286a3 | 1733 | OPENSSL_free(extensions); |
b9908bf9 | 1734 | return MSG_PROCESS_ERROR; |
0f113f3e | 1735 | } |
d02b48c6 | 1736 | |
597c51bc MC |
1737 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL *s, |
1738 | PACKET *extpkt) | |
3847d426 | 1739 | { |
3847d426 | 1740 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1741 | |
d4504fe5 MC |
1742 | /* |
1743 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1744 | * should not be used. | |
1745 | */ | |
1746 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1747 | s->enc_write_ctx = NULL; | |
1748 | ||
597c51bc | 1749 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1750 | &extensions, NULL, 1) |
fe874d27 | 1751 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1752 | extensions, NULL, 0, 1)) { |
1753 | /* SSLfatal() already called */ | |
1754 | goto err; | |
1755 | } | |
3847d426 MC |
1756 | |
1757 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1758 | extensions = NULL; |
1759 | ||
f5d270ca BK |
1760 | if (s->ext.tls13_cookie_len == 0 |
1761 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
1762 | && s->s3->tmp.pkey != NULL | |
1763 | #endif | |
1764 | ) { | |
66d4bf6b MC |
1765 | /* |
1766 | * We didn't receive a cookie or a new key_share so the next | |
1767 | * ClientHello will not change | |
1768 | */ | |
f63a17d6 | 1769 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
597c51bc MC |
1770 | SSL_F_TLS_PROCESS_AS_HELLO_RETRY_REQUEST, |
1771 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
f63a17d6 | 1772 | goto err; |
66d4bf6b | 1773 | } |
3847d426 | 1774 | |
11c67eea MC |
1775 | /* |
1776 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1777 | * a synthetic message_hash in place of ClientHello1. | |
1778 | */ | |
43054d3d | 1779 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1780 | /* SSLfatal() already called */ |
1781 | goto err; | |
11c67eea MC |
1782 | } |
1783 | ||
1784 | /* | |
1785 | * Add this message to the Transcript Hash. Normally this is done | |
1786 | * automatically prior to the message processing stage. However due to the | |
1787 | * need to create the synthetic message hash, we defer that step until now | |
1788 | * for HRR messages. | |
1789 | */ | |
1790 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1791 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1792 | /* SSLfatal() already called */ |
1793 | goto err; | |
11c67eea MC |
1794 | } |
1795 | ||
3847d426 | 1796 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1797 | err: |
3847d426 MC |
1798 | OPENSSL_free(extensions); |
1799 | return MSG_PROCESS_ERROR; | |
1800 | } | |
1801 | ||
be3583fa | 1802 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1803 | { |
f63a17d6 | 1804 | int i; |
eb5fd03b | 1805 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
b9908bf9 MC |
1806 | unsigned long cert_list_len, cert_len; |
1807 | X509 *x = NULL; | |
b6981744 | 1808 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1809 | STACK_OF(X509) *sk = NULL; |
1810 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1811 | size_t chainidx, certidx; |
e96e0f8e | 1812 | unsigned int context = 0; |
7f6b466b | 1813 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1814 | |
1815 | if ((sk = sk_X509_new_null()) == NULL) { | |
f63a17d6 MC |
1816 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1817 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1818 | goto err; |
0f113f3e MC |
1819 | } |
1820 | ||
e96e0f8e MC |
1821 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1822 | || context != 0 | |
1823 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1824 | || PACKET_remaining(pkt) != cert_list_len |
1825 | || PACKET_remaining(pkt) == 0) { | |
f63a17d6 MC |
1826 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1827 | SSL_R_LENGTH_MISMATCH); | |
1828 | goto err; | |
0f113f3e | 1829 | } |
d805a57b | 1830 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1831 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1832 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
f63a17d6 MC |
1833 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1834 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1835 | SSL_R_CERT_LENGTH_MISMATCH); | |
1836 | goto err; | |
0f113f3e MC |
1837 | } |
1838 | ||
df758a85 MC |
1839 | certstart = certbytes; |
1840 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e | 1841 | if (x == NULL) { |
f63a17d6 MC |
1842 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, |
1843 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1844 | goto err; | |
0f113f3e | 1845 | } |
df758a85 | 1846 | if (certbytes != (certstart + cert_len)) { |
f63a17d6 MC |
1847 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1848 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1849 | SSL_R_CERT_LENGTH_MISMATCH); | |
1850 | goto err; | |
0f113f3e | 1851 | } |
e96e0f8e MC |
1852 | |
1853 | if (SSL_IS_TLS13(s)) { | |
1854 | RAW_EXTENSION *rawexts = NULL; | |
1855 | PACKET extensions; | |
1856 | ||
1857 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
1858 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1859 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1860 | SSL_R_BAD_LENGTH); | |
1861 | goto err; | |
e96e0f8e | 1862 | } |
fe874d27 MC |
1863 | if (!tls_collect_extensions(s, &extensions, |
1864 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1865 | NULL, chainidx == 0) |
8e1634ec | 1866 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1867 | rawexts, x, chainidx, |
8e1634ec | 1868 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1869 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1870 | /* SSLfatal already called */ |
1871 | goto err; | |
5ee289ea MC |
1872 | } |
1873 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1874 | } |
1875 | ||
0f113f3e | 1876 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
1877 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1878 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1879 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1880 | goto err; |
0f113f3e MC |
1881 | } |
1882 | x = NULL; | |
0f113f3e MC |
1883 | } |
1884 | ||
1885 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1886 | /* |
1887 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1888 | * for client side verification of the server certificate to take place. | |
1889 | * However, historically the code has only checked that *any* flag is set | |
1890 | * to cause server verification to take place. Use of the other flags makes | |
1891 | * no sense in client mode. An attempt to clean up the semantics was | |
1892 | * reverted because at least one application *only* set | |
1893 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1894 | * server verification to take place, after the clean up it silently did | |
1895 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1896 | * sent to them because they are void functions. Therefore, we now use the | |
1897 | * (less clean) historic behaviour of performing validation if any flag is | |
1898 | * set. The *documented* interface remains the same. | |
1899 | */ | |
1900 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
c6d38183 | 1901 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 MC |
1902 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1903 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1904 | goto err; | |
0f113f3e MC |
1905 | } |
1906 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1907 | if (i > 1) { | |
f63a17d6 MC |
1908 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1909 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); | |
1910 | goto err; | |
0f113f3e MC |
1911 | } |
1912 | ||
c34b0f99 | 1913 | s->session->peer_chain = sk; |
0f113f3e MC |
1914 | /* |
1915 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1916 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1917 | */ |
1918 | x = sk_X509_value(sk, 0); | |
1919 | sk = NULL; | |
0f113f3e | 1920 | |
8382fd3a | 1921 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1922 | |
55a9a16f | 1923 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1924 | x = NULL; |
f63a17d6 MC |
1925 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1926 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1927 | goto err; | |
0f113f3e MC |
1928 | } |
1929 | ||
7f6b466b | 1930 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e | 1931 | x = NULL; |
f63a17d6 MC |
1932 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1933 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1934 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1935 | goto err; | |
0f113f3e | 1936 | } |
05b8486e DSH |
1937 | /* |
1938 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1939 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1940 | * type. | |
1941 | */ | |
1942 | if (!SSL_IS_TLS13(s)) { | |
7f6b466b | 1943 | if ((clu->amask & s->s3->tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e | 1944 | x = NULL; |
f63a17d6 MC |
1945 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1946 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1947 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1948 | goto err; | |
05b8486e | 1949 | } |
0f113f3e | 1950 | } |
7f6b466b | 1951 | s->session->peer_type = certidx; |
55a9a16f MC |
1952 | |
1953 | X509_free(s->session->peer); | |
05f0fb9f | 1954 | X509_up_ref(x); |
55a9a16f | 1955 | s->session->peer = x; |
0f113f3e | 1956 | s->session->verify_result = s->verify_result; |
0f113f3e | 1957 | x = NULL; |
2c5dfdc3 MC |
1958 | |
1959 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1960 | if (SSL_IS_TLS13(s) | |
1961 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1962 | sizeof(s->cert_verify_hash), | |
1963 | &s->cert_verify_hash_len)) { | |
f63a17d6 MC |
1964 | /* SSLfatal() already called */; |
1965 | goto err; | |
2c5dfdc3 MC |
1966 | } |
1967 | ||
b9908bf9 | 1968 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 1969 | |
cc273a93 | 1970 | err: |
0f113f3e MC |
1971 | X509_free(x); |
1972 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1973 | return ret; |
0f113f3e | 1974 | } |
d02b48c6 | 1975 | |
a2c2e000 | 1976 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
1977 | { |
1978 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1979 | PACKET psk_identity_hint; |
02a74590 | 1980 | |
7dc1c647 MC |
1981 | /* PSK ciphersuites are preceded by an identity hint */ |
1982 | ||
1983 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
a2c2e000 MC |
1984 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1985 | SSL_R_LENGTH_MISMATCH); | |
7dc1c647 MC |
1986 | return 0; |
1987 | } | |
1988 | ||
1989 | /* | |
1990 | * Store PSK identity hint for later use, hint is used in | |
1991 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1992 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1993 | * identity. | |
1994 | */ | |
1995 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
1996 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1997 | SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, | |
1998 | SSL_R_DATA_LENGTH_TOO_LONG); | |
7dc1c647 MC |
1999 | return 0; |
2000 | } | |
02a74590 | 2001 | |
7dc1c647 MC |
2002 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2003 | OPENSSL_free(s->session->psk_identity_hint); | |
2004 | s->session->psk_identity_hint = NULL; | |
2005 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2006 | &s->session->psk_identity_hint)) { |
a2c2e000 MC |
2007 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2008 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 MC |
2009 | return 0; |
2010 | } | |
2011 | ||
2012 | return 1; | |
2013 | #else | |
a2c2e000 MC |
2014 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
2015 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 | 2016 | return 0; |
02a74590 MC |
2017 | #endif |
2018 | } | |
2019 | ||
a2c2e000 | 2020 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2021 | { |
2022 | #ifndef OPENSSL_NO_SRP | |
2023 | PACKET prime, generator, salt, server_pub; | |
2024 | ||
2025 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2026 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2027 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2028 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
a2c2e000 MC |
2029 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2030 | SSL_R_LENGTH_MISMATCH); | |
25c6c10c MC |
2031 | return 0; |
2032 | } | |
2033 | ||
348240c6 | 2034 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
2035 | if ((s->srp_ctx.N = |
2036 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2037 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2038 | || (s->srp_ctx.g = |
2039 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2040 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2041 | || (s->srp_ctx.s = |
2042 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2043 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2044 | || (s->srp_ctx.B = |
2045 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2046 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
a2c2e000 MC |
2047 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2048 | ERR_R_BN_LIB); | |
25c6c10c MC |
2049 | return 0; |
2050 | } | |
2051 | ||
a2c2e000 MC |
2052 | if (!srp_verify_server_param(s)) { |
2053 | /* SSLfatal() already called */ | |
25c6c10c MC |
2054 | return 0; |
2055 | } | |
2056 | ||
2057 | /* We must check if there is a certificate */ | |
a230b26e | 2058 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2059 | *pkey = X509_get0_pubkey(s->session->peer); |
2060 | ||
2061 | return 1; | |
2062 | #else | |
a2c2e000 MC |
2063 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
2064 | ERR_R_INTERNAL_ERROR); | |
25c6c10c MC |
2065 | return 0; |
2066 | #endif | |
2067 | } | |
2068 | ||
a2c2e000 | 2069 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d MC |
2070 | { |
2071 | #ifndef OPENSSL_NO_DH | |
2072 | PACKET prime, generator, pub_key; | |
2073 | EVP_PKEY *peer_tmp = NULL; | |
2074 | ||
2075 | DH *dh = NULL; | |
2076 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
2077 | ||
26505153 RL |
2078 | int check_bits = 0; |
2079 | ||
e01a610d MC |
2080 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2081 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2082 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
a2c2e000 MC |
2083 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2084 | SSL_R_LENGTH_MISMATCH); | |
e01a610d MC |
2085 | return 0; |
2086 | } | |
2087 | ||
2088 | peer_tmp = EVP_PKEY_new(); | |
2089 | dh = DH_new(); | |
2090 | ||
2091 | if (peer_tmp == NULL || dh == NULL) { | |
a2c2e000 MC |
2092 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2093 | ERR_R_MALLOC_FAILURE); | |
e01a610d MC |
2094 | goto err; |
2095 | } | |
2096 | ||
348240c6 MC |
2097 | /* TODO(size_t): Convert these calls */ |
2098 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2099 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2100 | NULL); | |
2101 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2102 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2103 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
a2c2e000 MC |
2104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2105 | ERR_R_BN_LIB); | |
e01a610d MC |
2106 | goto err; |
2107 | } | |
2108 | ||
69687aa8 | 2109 | /* test non-zero pubkey */ |
26505153 | 2110 | if (BN_is_zero(bnpub_key)) { |
a2c2e000 MC |
2111 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2112 | SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2113 | goto err; |
2114 | } | |
2115 | ||
2116 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
a2c2e000 MC |
2117 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2118 | ERR_R_BN_LIB); | |
e01a610d MC |
2119 | goto err; |
2120 | } | |
2121 | p = g = NULL; | |
2122 | ||
26505153 | 2123 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
a2c2e000 MC |
2124 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2125 | SSL_R_BAD_DH_VALUE); | |
26505153 RL |
2126 | goto err; |
2127 | } | |
2128 | ||
e01a610d | 2129 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
a2c2e000 MC |
2130 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2131 | ERR_R_BN_LIB); | |
e01a610d MC |
2132 | goto err; |
2133 | } | |
2134 | bnpub_key = NULL; | |
2135 | ||
2136 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
a2c2e000 MC |
2137 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SKE_DHE, |
2138 | SSL_R_DH_KEY_TOO_SMALL); | |
e01a610d MC |
2139 | goto err; |
2140 | } | |
2141 | ||
2142 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
a2c2e000 MC |
2143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2144 | ERR_R_EVP_LIB); | |
e01a610d MC |
2145 | goto err; |
2146 | } | |
2147 | ||
2148 | s->s3->peer_tmp = peer_tmp; | |
2149 | ||
2150 | /* | |
2151 | * FIXME: This makes assumptions about which ciphersuites come with | |
2152 | * public keys. We should have a less ad-hoc way of doing this | |
2153 | */ | |
a230b26e | 2154 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2155 | *pkey = X509_get0_pubkey(s->session->peer); |
2156 | /* else anonymous DH, so no certificate or pkey. */ | |
2157 | ||
2158 | return 1; | |
2159 | ||
2160 | err: | |
2161 | BN_free(p); | |
2162 | BN_free(g); | |
2163 | BN_free(bnpub_key); | |
2164 | DH_free(dh); | |
2165 | EVP_PKEY_free(peer_tmp); | |
2166 | ||
2167 | return 0; | |
2168 | #else | |
a2c2e000 MC |
2169 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2170 | ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2171 | return 0; |
2172 | #endif | |
2173 | } | |
2174 | ||
a2c2e000 | 2175 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 MC |
2176 | { |
2177 | #ifndef OPENSSL_NO_EC | |
2178 | PACKET encoded_pt; | |
6447e818 | 2179 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2180 | |
2181 | /* | |
2182 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2183 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2184 | * ECParameters in this case is just three bytes. |
2185 | */ | |
6447e818 | 2186 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
a2c2e000 MC |
2187 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2188 | SSL_R_LENGTH_TOO_SHORT); | |
ff74aeb1 MC |
2189 | return 0; |
2190 | } | |
2191 | /* | |
6447e818 DSH |
2192 | * Check curve is named curve type and one of our preferences, if not |
2193 | * server has sent an invalid curve. | |
ff74aeb1 | 2194 | */ |
dcf8b01f MC |
2195 | if (curve_type != NAMED_CURVE_TYPE |
2196 | || !tls1_check_group_id(s, curve_id, 1)) { | |
a2c2e000 MC |
2197 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2198 | SSL_R_WRONG_CURVE); | |
ff74aeb1 MC |
2199 | return 0; |
2200 | } | |
2201 | ||
6447e818 | 2202 | if ((s->s3->peer_tmp = ssl_generate_param_group(curve_id)) == NULL) { |
a2c2e000 MC |
2203 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2204 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
ff74aeb1 MC |
2205 | return 0; |
2206 | } | |
2207 | ||
ff74aeb1 | 2208 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
a2c2e000 MC |
2209 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2210 | SSL_R_LENGTH_MISMATCH); | |
ff74aeb1 MC |
2211 | return 0; |
2212 | } | |
2213 | ||
ec24630a DSH |
2214 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2215 | PACKET_data(&encoded_pt), | |
2216 | PACKET_remaining(&encoded_pt))) { | |
a2c2e000 MC |
2217 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2218 | SSL_R_BAD_ECPOINT); | |
ff74aeb1 MC |
2219 | return 0; |
2220 | } | |
2221 | ||
2222 | /* | |
2223 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2224 | * ECParameters in the server key exchange message. We do support RSA | |
2225 | * and ECDSA. | |
2226 | */ | |
2227 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2228 | *pkey = X509_get0_pubkey(s->session->peer); | |
2229 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2230 | *pkey = X509_get0_pubkey(s->session->peer); | |
2231 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2232 | ||
2233 | return 1; | |
2234 | #else | |
a2c2e000 MC |
2235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2236 | ERR_R_INTERNAL_ERROR); | |
ff74aeb1 MC |
2237 | return 0; |
2238 | #endif | |
2239 | } | |
2240 | ||
be3583fa | 2241 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2242 | { |
e1e588ac | 2243 | long alg_k; |
b9908bf9 | 2244 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2245 | EVP_MD_CTX *md_ctx = NULL; |
2246 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2247 | PACKET save_param_start, signature; |
b9908bf9 | 2248 | |
b9908bf9 MC |
2249 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2250 | ||
73999b62 | 2251 | save_param_start = *pkt; |
8d92c1f8 | 2252 | |
3260adf1 | 2253 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2254 | EVP_PKEY_free(s->s3->peer_tmp); |
2255 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2256 | #endif |
d02b48c6 | 2257 | |
7689082b | 2258 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2259 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2260 | /* SSLfatal() already called */ | |
7dc1c647 | 2261 | goto err; |
a2c2e000 | 2262 | } |
7689082b DSH |
2263 | } |
2264 | ||
2265 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2266 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2267 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2268 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2269 | /* SSLfatal() already called */ | |
0f113f3e | 2270 | goto err; |
a2c2e000 | 2271 | } |
e01a610d | 2272 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2273 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2274 | /* SSLfatal() already called */ | |
e01a610d | 2275 | goto err; |
a2c2e000 | 2276 | } |
ff74aeb1 | 2277 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2278 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2279 | /* SSLfatal() already called */ | |
ff74aeb1 | 2280 | goto err; |
a2c2e000 | 2281 | } |
0f113f3e | 2282 | } else if (alg_k) { |
a2c2e000 MC |
2283 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2284 | SSL_R_UNEXPECTED_MESSAGE); | |
e1e588ac | 2285 | goto err; |
0f113f3e | 2286 | } |
0f113f3e | 2287 | |
0f113f3e MC |
2288 | /* if it was signed, check the signature */ |
2289 | if (pkey != NULL) { | |
32942870 | 2290 | PACKET params; |
be8dba2c MC |
2291 | int maxsig; |
2292 | const EVP_MD *md = NULL; | |
72ceb6a6 DSH |
2293 | unsigned char *tbs; |
2294 | size_t tbslen; | |
2295 | int rv; | |
e1e588ac | 2296 | |
32942870 EK |
2297 | /* |
2298 | * |pkt| now points to the beginning of the signature, so the difference | |
2299 | * equals the length of the parameters. | |
2300 | */ | |
2301 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2302 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2303 | PACKET_remaining(pkt))) { |
a2c2e000 MC |
2304 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2305 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2306 | goto err; |
32942870 EK |
2307 | } |
2308 | ||
0f113f3e | 2309 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2310 | unsigned int sigalg; |
703bcee0 MC |
2311 | |
2312 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
a2c2e000 MC |
2313 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2314 | SSL_R_LENGTH_TOO_SHORT); | |
e1e588ac | 2315 | goto err; |
0f113f3e | 2316 | } |
f63a17d6 MC |
2317 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2318 | /* SSLfatal() already called */ | |
0f113f3e | 2319 | goto err; |
0f113f3e | 2320 | } |
f365a3e2 | 2321 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
a2c2e000 MC |
2322 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2323 | ERR_R_INTERNAL_ERROR); | |
f365a3e2 | 2324 | goto err; |
32942870 | 2325 | } |
0f113f3e | 2326 | |
b2021556 | 2327 | if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) { |
a2c2e000 MC |
2328 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2329 | ERR_R_INTERNAL_ERROR); | |
b2021556 DSH |
2330 | goto err; |
2331 | } | |
44f23cd2 RS |
2332 | #ifdef SSL_DEBUG |
2333 | if (SSL_USE_SIGALGS(s)) | |
2334 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); | |
2335 | #endif | |
f365a3e2 | 2336 | |
73999b62 MC |
2337 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2338 | || PACKET_remaining(pkt) != 0) { | |
a2c2e000 MC |
2339 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2340 | SSL_R_LENGTH_MISMATCH); | |
e1e588ac | 2341 | goto err; |
0f113f3e | 2342 | } |
be8dba2c MC |
2343 | maxsig = EVP_PKEY_size(pkey); |
2344 | if (maxsig < 0) { | |
a2c2e000 MC |
2345 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2346 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2347 | goto err; |
8098fc56 | 2348 | } |
0f113f3e MC |
2349 | |
2350 | /* | |
8098fc56 | 2351 | * Check signature length |
0f113f3e | 2352 | */ |
be8dba2c | 2353 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2354 | /* wrong packet length */ |
a2c2e000 | 2355 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
a230b26e | 2356 | SSL_R_WRONG_SIGNATURE_LENGTH); |
e1e588ac MC |
2357 | goto err; |
2358 | } | |
2359 | ||
2360 | md_ctx = EVP_MD_CTX_new(); | |
2361 | if (md_ctx == NULL) { | |
a2c2e000 | 2362 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
dd5a4279 | 2363 | ERR_R_MALLOC_FAILURE); |
e1e588ac | 2364 | goto err; |
0f113f3e | 2365 | } |
e1e588ac | 2366 | |
fe3066ee | 2367 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
a2c2e000 MC |
2368 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2369 | ERR_R_EVP_LIB); | |
fe3066ee MC |
2370 | goto err; |
2371 | } | |
5554facb | 2372 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2373 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2374 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2375 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
a2c2e000 MC |
2376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2377 | SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
fe3066ee MC |
2378 | goto err; |
2379 | } | |
2380 | } | |
72ceb6a6 DSH |
2381 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2382 | PACKET_remaining(¶ms)); | |
2383 | if (tbslen == 0) { | |
f63a17d6 | 2384 | /* SSLfatal() already called */ |
e1e588ac | 2385 | goto err; |
192e4bbb | 2386 | } |
72ceb6a6 DSH |
2387 | |
2388 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2389 | PACKET_remaining(&signature), tbs, tbslen); | |
2390 | OPENSSL_free(tbs); | |
cfba0675 | 2391 | if (rv <= 0) { |
a2c2e000 MC |
2392 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2393 | SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2394 | goto err; |
0f113f3e | 2395 | } |
e1e588ac | 2396 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2397 | md_ctx = NULL; |
0f113f3e | 2398 | } else { |
7689082b | 2399 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2400 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2401 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2402 | /* Might be wrong key type, check it */ |
e1e588ac | 2403 | if (ssl3_check_cert_and_algorithm(s)) { |
a2c2e000 MC |
2404 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2405 | SSL_R_BAD_DATA); | |
e1e588ac | 2406 | } |
a2c2e000 | 2407 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2408 | goto err; |
2409 | } | |
2410 | /* still data left over */ | |
73999b62 | 2411 | if (PACKET_remaining(pkt) != 0) { |
a2c2e000 MC |
2412 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2413 | SSL_R_EXTRA_DATA_IN_MESSAGE); | |
e1e588ac | 2414 | goto err; |
0f113f3e MC |
2415 | } |
2416 | } | |
e1e588ac | 2417 | |
b9908bf9 | 2418 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2419 | err: |
fe3066ee | 2420 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2421 | return MSG_PROCESS_ERROR; |
0f113f3e | 2422 | } |
d02b48c6 | 2423 | |
be3583fa | 2424 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2425 | { |
32f66107 DSH |
2426 | size_t i; |
2427 | ||
2428 | /* Clear certificate validity flags */ | |
2429 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2430 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2431 | |
03f44b97 | 2432 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2433 | PACKET reqctx, extensions; |
2434 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2435 | |
2436 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2437 | OPENSSL_free(s->s3->tmp.ctype); | |
2438 | s->s3->tmp.ctype = NULL; | |
2439 | s->s3->tmp.ctype_len = 0; | |
9d75dce3 TS |
2440 | OPENSSL_free(s->pha_context); |
2441 | s->pha_context = NULL; | |
32f66107 | 2442 | |
9d75dce3 TS |
2443 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2444 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
f63a17d6 MC |
2445 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2446 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2447 | SSL_R_LENGTH_MISMATCH); | |
2448 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2449 | } |
32f66107 DSH |
2450 | |
2451 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
2452 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2453 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2454 | SSL_R_BAD_LENGTH); | |
2455 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2456 | } |
2457 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2458 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2459 | &rawexts, NULL, 1) |
fe874d27 | 2460 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2461 | rawexts, NULL, 0, 1)) { |
2462 | /* SSLfatal() already called */ | |
32f66107 | 2463 | OPENSSL_free(rawexts); |
f63a17d6 | 2464 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2465 | } |
2466 | OPENSSL_free(rawexts); | |
2467 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2468 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2469 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2470 | SSL_R_BAD_LENGTH); | |
2471 | return MSG_PROCESS_ERROR; | |
32f66107 | 2472 | } |
03f44b97 DSH |
2473 | } else { |
2474 | PACKET ctypes; | |
75c13e78 | 2475 | |
03f44b97 DSH |
2476 | /* get the certificate types */ |
2477 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
f63a17d6 MC |
2478 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2479 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2480 | SSL_R_LENGTH_MISMATCH); | |
2481 | return MSG_PROCESS_ERROR; | |
03f44b97 DSH |
2482 | } |
2483 | ||
2484 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
f63a17d6 MC |
2485 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2486 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2487 | ERR_R_INTERNAL_ERROR); | |
2488 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2489 | } |
ac112332 | 2490 | |
32f66107 DSH |
2491 | if (SSL_USE_SIGALGS(s)) { |
2492 | PACKET sigalgs; | |
703bcee0 | 2493 | |
32f66107 | 2494 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
848a950b | 2495 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2496 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2497 | SSL_R_LENGTH_MISMATCH); | |
2498 | return MSG_PROCESS_ERROR; | |
32f66107 | 2499 | } |
ac112332 | 2500 | |
c589c34e BK |
2501 | /* |
2502 | * Despite this being for certificates, preserve compatibility | |
2503 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2504 | */ | |
2505 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 MC |
2506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2507 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2508 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2509 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2510 | } |
2511 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2512 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2513 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2514 | ERR_R_MALLOC_FAILURE); | |
2515 | return MSG_PROCESS_ERROR; | |
32f66107 | 2516 | } |
0f113f3e | 2517 | } |
0f113f3e | 2518 | |
32f66107 | 2519 | /* get the CA RDNs */ |
f63a17d6 MC |
2520 | if (!parse_ca_names(s, pkt)) { |
2521 | /* SSLfatal() already called */ | |
2522 | return MSG_PROCESS_ERROR; | |
2523 | } | |
03f44b97 DSH |
2524 | } |
2525 | ||
2526 | if (PACKET_remaining(pkt) != 0) { | |
848a950b | 2527 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 MC |
2528 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2529 | SSL_R_LENGTH_MISMATCH); | |
2530 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2531 | } |
0f113f3e | 2532 | |
0f113f3e MC |
2533 | /* we should setup a certificate to return.... */ |
2534 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2535 | |
f63a17d6 | 2536 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2537 | } |
2538 | ||
be3583fa | 2539 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2540 | { |
b9908bf9 | 2541 | unsigned int ticklen; |
9ac6244b | 2542 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2543 | unsigned int sess_len; |
de1df7e9 | 2544 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2545 | PACKET nonce; |
b9908bf9 | 2546 | |
73999b62 | 2547 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2548 | || (SSL_IS_TLS13(s) |
2549 | && (!PACKET_get_net_4(pkt, &age_add) | |
2550 | || !PACKET_get_length_prefixed_1(pkt, &nonce) | |
9b6a8254 MC |
2551 | || !PACKET_memdup(&nonce, &s->session->ext.tick_nonce, |
2552 | &s->session->ext.tick_nonce_len))) | |
a230b26e | 2553 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2554 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2555 | || (SSL_IS_TLS13(s) |
2556 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f63a17d6 MC |
2557 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2558 | SSL_R_LENGTH_MISMATCH); | |
2559 | goto err; | |
e711da71 EK |
2560 | } |
2561 | ||
de1df7e9 MC |
2562 | /* |
2563 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2564 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2565 | * be 0 here in that instance | |
2566 | */ | |
e711da71 | 2567 | if (ticklen == 0) |
c9de4a20 | 2568 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2569 | |
150840b9 MC |
2570 | /* |
2571 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2572 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2573 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2574 | * time a NewSessionTicket arrives because those messages arrive | |
2575 | * post-handshake and the session may have already gone into the session | |
2576 | * cache. | |
2577 | */ | |
2578 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee MC |
2579 | int i = s->session_ctx->session_cache_mode; |
2580 | SSL_SESSION *new_sess; | |
2581 | /* | |
2582 | * We reused an existing session, so we need to replace it with a new | |
2583 | * one | |
2584 | */ | |
5d61491c | 2585 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
f63a17d6 MC |
2586 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2587 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2588 | ERR_R_MALLOC_FAILURE); | |
2589 | goto err; | |
5d61491c MC |
2590 | } |
2591 | ||
98ece4ee MC |
2592 | if (i & SSL_SESS_CACHE_CLIENT) { |
2593 | /* | |
e4612d02 | 2594 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2595 | */ |
e4612d02 | 2596 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2597 | } |
2598 | ||
98ece4ee MC |
2599 | SSL_SESSION_free(s->session); |
2600 | s->session = new_sess; | |
2601 | } | |
2602 | ||
fc24f0bf MC |
2603 | /* |
2604 | * Technically the cast to long here is not guaranteed by the C standard - | |
2605 | * but we use it elsewhere, so this should be ok. | |
2606 | */ | |
2607 | s->session->time = (long)time(NULL); | |
2608 | ||
aff8c126 RS |
2609 | OPENSSL_free(s->session->ext.tick); |
2610 | s->session->ext.tick = NULL; | |
2611 | s->session->ext.ticklen = 0; | |
e711da71 | 2612 | |
aff8c126 RS |
2613 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2614 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
2615 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2616 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2617 | goto err; |
2618 | } | |
aff8c126 | 2619 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
2620 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2621 | SSL_R_LENGTH_MISMATCH); | |
2622 | goto err; | |
561e12bb | 2623 | } |
e711da71 | 2624 | |
aff8c126 | 2625 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2626 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2627 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2628 | |
2629 | if (SSL_IS_TLS13(s)) { | |
2630 | PACKET extpkt; | |
2631 | ||
2632 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
26b9172a | 2633 | || PACKET_remaining(pkt) != 0 |
de1df7e9 | 2634 | || !tls_collect_extensions(s, &extpkt, |
fe874d27 | 2635 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
f63a17d6 | 2636 | &exts, NULL, 1) |
fe874d27 MC |
2637 | || !tls_parse_all_extensions(s, |
2638 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2639 | exts, NULL, 0, 1)) { |
2640 | /* SSLfatal() already called */ | |
2641 | goto err; | |
de1df7e9 MC |
2642 | } |
2643 | } | |
2644 | ||
0f113f3e MC |
2645 | /* |
2646 | * There are two ways to detect a resumed ticket session. One is to set | |
2647 | * an appropriate session ID and then the server must return a match in | |
2648 | * ServerHello. This allows the normal client session ID matching to work | |
2649 | * and we know much earlier that the ticket has been accepted. The | |
2650 | * other way is to set zero length session ID when the ticket is | |
2651 | * presented and rely on the handshake to determine session resumption. | |
2652 | * We choose the former approach because this fits in with assumptions | |
2653 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2654 | * SHA256 is disabled) hash of the ticket. | |
2655 | */ | |
ec60ccc1 MC |
2656 | /* |
2657 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2658 | * but s->session->session_id_length is a size_t | |
2659 | */ | |
aff8c126 | 2660 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2661 | s->session->session_id, &sess_len, |
d166ed8c | 2662 | EVP_sha256(), NULL)) { |
f63a17d6 MC |
2663 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2664 | ERR_R_EVP_LIB); | |
d166ed8c DSH |
2665 | goto err; |
2666 | } | |
ec60ccc1 | 2667 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2668 | |
2669 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2670 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2671 | OPENSSL_free(exts); |
de1df7e9 MC |
2672 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2673 | return MSG_PROCESS_FINISHED_READING; | |
2674 | } | |
2675 | ||
b9908bf9 | 2676 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2677 | err: |
33d93417 | 2678 | OPENSSL_free(exts); |
b9908bf9 | 2679 | return MSG_PROCESS_ERROR; |
0f113f3e | 2680 | } |
67c8e7f4 | 2681 | |
f63e4288 MC |
2682 | /* |
2683 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2684 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2685 | */ |
f63a17d6 | 2686 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2687 | { |
8b0e934a | 2688 | size_t resplen; |
b9908bf9 | 2689 | unsigned int type; |
b9908bf9 | 2690 | |
73999b62 | 2691 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2692 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
2693 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2694 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
f63e4288 | 2695 | return 0; |
0f113f3e | 2696 | } |
56a26ce3 MC |
2697 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2698 | || PACKET_remaining(pkt) != resplen) { | |
f63a17d6 MC |
2699 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2700 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2701 | return 0; |
0f113f3e | 2702 | } |
8cbfcc70 RS |
2703 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2704 | if (s->ext.ocsp.resp == NULL) { | |
f63a17d6 MC |
2705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2706 | ERR_R_MALLOC_FAILURE); | |
f63e4288 | 2707 | return 0; |
0f113f3e | 2708 | } |
8cbfcc70 | 2709 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63a17d6 MC |
2710 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2711 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2712 | return 0; |
ac63710a | 2713 | } |
8cbfcc70 | 2714 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2715 | |
2716 | return 1; | |
2717 | } | |
2faa1b48 | 2718 | |
f63e4288 MC |
2719 | |
2720 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2721 | { | |
f63a17d6 MC |
2722 | if (!tls_process_cert_status_body(s, pkt)) { |
2723 | /* SSLfatal() already called */ | |
f63e4288 MC |
2724 | return MSG_PROCESS_ERROR; |
2725 | } | |
2726 | ||
b9908bf9 | 2727 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2728 | } |
d02b48c6 | 2729 | |
7776a36c MC |
2730 | /* |
2731 | * Perform miscellaneous checks and processing after we have received the | |
2732 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2733 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2734 | * on failure. | |
7776a36c | 2735 | */ |
f63a17d6 | 2736 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2737 | { |
a455d0f6 MC |
2738 | /* |
2739 | * at this point we check that we have the required stuff from | |
2740 | * the server | |
2741 | */ | |
2742 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2743 | /* SSLfatal() already called */ |
7776a36c | 2744 | return 0; |
a455d0f6 MC |
2745 | } |
2746 | ||
bb1aaab4 | 2747 | /* |
aff8c126 RS |
2748 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2749 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2750 | * message, or NULL and -1 otherwise |
2751 | */ | |
aff8c126 RS |
2752 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2753 | && s->ctx->ext.status_cb != NULL) { | |
2754 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2755 | ||
bb1aaab4 | 2756 | if (ret == 0) { |
f63a17d6 MC |
2757 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
2758 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2759 | SSL_R_INVALID_STATUS_RESPONSE); | |
7776a36c | 2760 | return 0; |
bb1aaab4 MC |
2761 | } |
2762 | if (ret < 0) { | |
f63a17d6 MC |
2763 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2764 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
dd5a4279 | 2765 | ERR_R_MALLOC_FAILURE); |
7776a36c | 2766 | return 0; |
bb1aaab4 MC |
2767 | } |
2768 | } | |
ed29e82a RP |
2769 | #ifndef OPENSSL_NO_CT |
2770 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2771 | /* Note we validate the SCTs whether or not we abort on error */ |
2772 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2773 | /* SSLfatal() already called */ |
7776a36c | 2774 | return 0; |
ed29e82a RP |
2775 | } |
2776 | } | |
2777 | #endif | |
2778 | ||
7776a36c MC |
2779 | return 1; |
2780 | } | |
2781 | ||
2782 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2783 | { | |
7776a36c MC |
2784 | if (PACKET_remaining(pkt) > 0) { |
2785 | /* should contain no data */ | |
f63a17d6 MC |
2786 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2787 | SSL_R_LENGTH_MISMATCH); | |
2788 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2789 | } |
2790 | #ifndef OPENSSL_NO_SRP | |
2791 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2792 | if (SRP_Calc_A_param(s) <= 0) { | |
f63a17d6 MC |
2793 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2794 | SSL_R_SRP_A_CALC); | |
2795 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2796 | } |
2797 | } | |
2798 | #endif | |
2799 | ||
f63a17d6 MC |
2800 | if (!tls_process_initial_server_flight(s)) { |
2801 | /* SSLfatal() already called */ | |
2802 | return MSG_PROCESS_ERROR; | |
2803 | } | |
7776a36c | 2804 | |
bd79bcb4 | 2805 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2806 | } |
176f31dd | 2807 | |
a2c2e000 | 2808 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2809 | { |
7689082b | 2810 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2811 | int ret = 0; |
2812 | /* | |
2813 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2814 | * \0-terminated identity. The last byte is for us for simulating | |
2815 | * strnlen. | |
2816 | */ | |
2817 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2818 | size_t identitylen = 0; | |
2819 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2820 | unsigned char *tmppsk = NULL; | |
2821 | char *tmpidentity = NULL; | |
2822 | size_t psklen = 0; | |
2823 | ||
2824 | if (s->psk_client_callback == NULL) { | |
a2c2e000 MC |
2825 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2826 | SSL_R_PSK_NO_CLIENT_CB); | |
13c0ec4a MC |
2827 | goto err; |
2828 | } | |
d02b48c6 | 2829 | |
13c0ec4a | 2830 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2831 | |
13c0ec4a MC |
2832 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2833 | identity, sizeof(identity) - 1, | |
2834 | psk, sizeof(psk)); | |
7689082b | 2835 | |
13c0ec4a | 2836 | if (psklen > PSK_MAX_PSK_LEN) { |
a2c2e000 MC |
2837 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2838 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2839 | goto err; |
2840 | } else if (psklen == 0) { | |
a2c2e000 MC |
2841 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2842 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, | |
2843 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
13c0ec4a MC |
2844 | goto err; |
2845 | } | |
7689082b | 2846 | |
13c0ec4a MC |
2847 | identitylen = strlen(identity); |
2848 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2849 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2850 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2851 | goto err; |
2852 | } | |
7689082b | 2853 | |
13c0ec4a MC |
2854 | tmppsk = OPENSSL_memdup(psk, psklen); |
2855 | tmpidentity = OPENSSL_strdup(identity); | |
2856 | if (tmppsk == NULL || tmpidentity == NULL) { | |
a2c2e000 MC |
2857 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2858 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2859 | goto err; |
2860 | } | |
7689082b | 2861 | |
13c0ec4a MC |
2862 | OPENSSL_free(s->s3->tmp.psk); |
2863 | s->s3->tmp.psk = tmppsk; | |
2864 | s->s3->tmp.psklen = psklen; | |
2865 | tmppsk = NULL; | |
2866 | OPENSSL_free(s->session->psk_identity); | |
2867 | s->session->psk_identity = tmpidentity; | |
2868 | tmpidentity = NULL; | |
f1ec23c0 | 2869 | |
b2b3024e | 2870 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
a2c2e000 MC |
2871 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2872 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2873 | goto err; |
2874 | } | |
7689082b | 2875 | |
13c0ec4a | 2876 | ret = 1; |
0bce0b02 | 2877 | |
13c0ec4a MC |
2878 | err: |
2879 | OPENSSL_cleanse(psk, psklen); | |
2880 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2881 | OPENSSL_clear_free(tmppsk, psklen); | |
2882 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2883 | |
13c0ec4a MC |
2884 | return ret; |
2885 | #else | |
a2c2e000 MC |
2886 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2887 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2888 | return 0; |
b9908bf9 | 2889 | #endif |
13c0ec4a | 2890 | } |
b9908bf9 | 2891 | |
a2c2e000 | 2892 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2893 | { |
bc36ee62 | 2894 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2895 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2896 | EVP_PKEY *pkey = NULL; |
2897 | EVP_PKEY_CTX *pctx = NULL; | |
2898 | size_t enclen; | |
2899 | unsigned char *pms = NULL; | |
2900 | size_t pmslen = 0; | |
b9908bf9 | 2901 | |
13c0ec4a MC |
2902 | if (s->session->peer == NULL) { |
2903 | /* | |
2904 | * We should always have a server certificate with SSL_kRSA. | |
2905 | */ | |
a2c2e000 MC |
2906 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2907 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2908 | return 0; |
2909 | } | |
0f113f3e | 2910 | |
13c0ec4a MC |
2911 | pkey = X509_get0_pubkey(s->session->peer); |
2912 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
a2c2e000 MC |
2913 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2914 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2915 | return 0; |
2916 | } | |
0f113f3e | 2917 | |
13c0ec4a MC |
2918 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2919 | pms = OPENSSL_malloc(pmslen); | |
2920 | if (pms == NULL) { | |
a2c2e000 MC |
2921 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2922 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2923 | return 0; |
2924 | } | |
0bce0b02 | 2925 | |
13c0ec4a MC |
2926 | pms[0] = s->client_version >> 8; |
2927 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2928 | /* TODO(size_t): Convert this function */ |
16cfc2c9 | 2929 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { |
a2c2e000 MC |
2930 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2931 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2932 | goto err; |
2933 | } | |
0f113f3e | 2934 | |
13c0ec4a | 2935 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2936 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
a2c2e000 MC |
2937 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2938 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2939 | goto err; |
2940 | } | |
13c0ec4a MC |
2941 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2942 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2943 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2944 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2945 | ERR_R_EVP_LIB); | |
13c0ec4a MC |
2946 | goto err; |
2947 | } | |
f1ec23c0 MC |
2948 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2949 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2950 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2951 | SSL_R_BAD_RSA_ENCRYPT); | |
13c0ec4a MC |
2952 | goto err; |
2953 | } | |
13c0ec4a MC |
2954 | EVP_PKEY_CTX_free(pctx); |
2955 | pctx = NULL; | |
0f113f3e | 2956 | |
13c0ec4a | 2957 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2958 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
a2c2e000 MC |
2959 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2960 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2961 | goto err; |
b9908bf9 | 2962 | } |
13c0ec4a | 2963 | |
2faa1b48 | 2964 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
2965 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
2966 | /* SSLfatal() already called */ | |
2faa1b48 | 2967 | goto err; |
a2c2e000 | 2968 | } |
2faa1b48 | 2969 | |
26fb4b03 RS |
2970 | s->s3->tmp.pms = pms; |
2971 | s->s3->tmp.pmslen = pmslen; | |
2972 | ||
13c0ec4a MC |
2973 | return 1; |
2974 | err: | |
2975 | OPENSSL_clear_free(pms, pmslen); | |
2976 | EVP_PKEY_CTX_free(pctx); | |
2977 | ||
2978 | return 0; | |
2979 | #else | |
a2c2e000 MC |
2980 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2981 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2982 | return 0; |
f9b3bff6 | 2983 | #endif |
13c0ec4a MC |
2984 | } |
2985 | ||
a2c2e000 | 2986 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 MC |
2987 | { |
2988 | #ifndef OPENSSL_NO_DH | |
2989 | DH *dh_clnt = NULL; | |
2990 | const BIGNUM *pub_key; | |
2991 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2992 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2993 | |
2994 | skey = s->s3->peer_tmp; | |
a2c2e000 MC |
2995 | if (skey == NULL) { |
2996 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2997 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2998 | goto err; |
a2c2e000 | 2999 | } |
f1ec23c0 | 3000 | |
0a699a07 | 3001 | ckey = ssl_generate_pkey(skey); |
a2c2e000 MC |
3002 | if (ckey == NULL) { |
3003 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3004 | ERR_R_INTERNAL_ERROR); | |
b599ce3b | 3005 | goto err; |
a2c2e000 | 3006 | } |
b599ce3b | 3007 | |
a8c1c704 MC |
3008 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
3009 | ||
a2c2e000 MC |
3010 | if (dh_clnt == NULL) { |
3011 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3012 | ERR_R_INTERNAL_ERROR); | |
3013 | goto err; | |
3014 | } | |
3015 | ||
3016 | if (ssl_derive(s, ckey, skey, 0) == 0) { | |
3017 | /* SSLfatal() already called */ | |
f1ec23c0 | 3018 | goto err; |
a2c2e000 | 3019 | } |
a8c1c704 MC |
3020 | |
3021 | /* send off the data */ | |
3022 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
a2c2e000 MC |
3023 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), |
3024 | &keybytes)) { | |
3025 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
3026 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3027 | goto err; |
a2c2e000 | 3028 | } |
f1ec23c0 MC |
3029 | |
3030 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
3031 | EVP_PKEY_free(ckey); |
3032 | ||
3033 | return 1; | |
f1ec23c0 MC |
3034 | err: |
3035 | EVP_PKEY_free(ckey); | |
f9f674eb MC |
3036 | return 0; |
3037 | #else | |
a2c2e000 MC |
3038 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, |
3039 | ERR_R_INTERNAL_ERROR); | |
a8c1c704 | 3040 | return 0; |
f9f674eb | 3041 | #endif |
a8c1c704 MC |
3042 | } |
3043 | ||
a2c2e000 | 3044 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab MC |
3045 | { |
3046 | #ifndef OPENSSL_NO_EC | |
3047 | unsigned char *encodedPoint = NULL; | |
348240c6 | 3048 | size_t encoded_pt_len = 0; |
67ad5aab | 3049 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3050 | int ret = 0; |
67ad5aab MC |
3051 | |
3052 | skey = s->s3->peer_tmp; | |
ec24630a | 3053 | if (skey == NULL) { |
a2c2e000 MC |
3054 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3055 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3056 | return 0; |
3057 | } | |
3058 | ||
0a699a07 | 3059 | ckey = ssl_generate_pkey(skey); |
b599ce3b | 3060 | if (ckey == NULL) { |
a2c2e000 MC |
3061 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3062 | ERR_R_MALLOC_FAILURE); | |
b599ce3b MC |
3063 | goto err; |
3064 | } | |
67ad5aab | 3065 | |
0f1e51ea | 3066 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3067 | /* SSLfatal() already called */ |
67ad5aab MC |
3068 | goto err; |
3069 | } | |
3070 | ||
3071 | /* Generate encoding of client key */ | |
ec24630a | 3072 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
3073 | |
3074 | if (encoded_pt_len == 0) { | |
a2c2e000 MC |
3075 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3076 | ERR_R_EC_LIB); | |
67ad5aab MC |
3077 | goto err; |
3078 | } | |
3079 | ||
b2b3024e | 3080 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
a2c2e000 MC |
3081 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3082 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
3083 | goto err; |
3084 | } | |
67ad5aab | 3085 | |
f1ec23c0 | 3086 | ret = 1; |
67ad5aab | 3087 | err: |
f1ec23c0 | 3088 | OPENSSL_free(encodedPoint); |
67ad5aab | 3089 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3090 | return ret; |
67ad5aab | 3091 | #else |
a2c2e000 MC |
3092 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
3093 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
3094 | return 0; |
3095 | #endif | |
3096 | } | |
3097 | ||
a2c2e000 | 3098 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3099 | { |
3100 | #ifndef OPENSSL_NO_GOST | |
3101 | /* GOST key exchange message creation */ | |
3102 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3103 | X509 *peer_cert; | |
3104 | size_t msglen; | |
3105 | unsigned int md_len; | |
3106 | unsigned char shared_ukm[32], tmp[256]; | |
3107 | EVP_MD_CTX *ukm_hash = NULL; | |
3108 | int dgst_nid = NID_id_GostR3411_94; | |
3109 | unsigned char *pms = NULL; | |
3110 | size_t pmslen = 0; | |
3111 | ||
3112 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
3113 | dgst_nid = NID_id_GostR3411_2012_256; | |
3114 | ||
3115 | /* | |
1ee4b98e | 3116 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3117 | */ |
3118 | peer_cert = s->session->peer; | |
3119 | if (!peer_cert) { | |
a2c2e000 | 3120 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
3121 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
3122 | return 0; | |
3123 | } | |
3124 | ||
3125 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
3126 | if (pkey_ctx == NULL) { | |
a2c2e000 MC |
3127 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3128 | ERR_R_MALLOC_FAILURE); | |
e00e0b3d MC |
3129 | return 0; |
3130 | } | |
3131 | /* | |
3132 | * If we have send a certificate, and certificate key | |
3133 | * parameters match those of server certificate, use | |
3134 | * certificate key for key exchange | |
3135 | */ | |
3136 | ||
3137 | /* Otherwise, generate ephemeral key pair */ | |
3138 | pmslen = 32; | |
3139 | pms = OPENSSL_malloc(pmslen); | |
3140 | if (pms == NULL) { | |
a2c2e000 MC |
3141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3142 | ERR_R_MALLOC_FAILURE); | |
2f3930bc | 3143 | goto err; |
e00e0b3d MC |
3144 | } |
3145 | ||
3146 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3147 | /* Generate session key |
3148 | * TODO(size_t): Convert this function | |
3149 | */ | |
16cfc2c9 | 3150 | || RAND_bytes(pms, (int)pmslen) <= 0) { |
a2c2e000 MC |
3151 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3152 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3153 | goto err; |
3154 | }; | |
e00e0b3d MC |
3155 | /* |
3156 | * Compute shared IV and store it in algorithm-specific context | |
3157 | * data | |
3158 | */ | |
3159 | ukm_hash = EVP_MD_CTX_new(); | |
3160 | if (ukm_hash == NULL | |
a230b26e EK |
3161 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3162 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3163 | SSL3_RANDOM_SIZE) <= 0 | |
3164 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3165 | SSL3_RANDOM_SIZE) <= 0 | |
3166 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
a2c2e000 MC |
3167 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3168 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3169 | goto err; |
3170 | } | |
3171 | EVP_MD_CTX_free(ukm_hash); | |
3172 | ukm_hash = NULL; | |
3173 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3174 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
a2c2e000 MC |
3175 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3176 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3177 | goto err; |
3178 | } | |
3179 | /* Make GOST keytransport blob message */ | |
3180 | /* | |
3181 | * Encapsulate it into sequence | |
3182 | */ | |
e00e0b3d MC |
3183 | msglen = 255; |
3184 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3185 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3186 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3187 | goto err; |
3188 | } | |
f1ec23c0 | 3189 | |
08029dfa MC |
3190 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3191 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3192 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
a2c2e000 MC |
3193 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3194 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3195 | goto err; |
e00e0b3d | 3196 | } |
f1ec23c0 | 3197 | |
e00e0b3d MC |
3198 | EVP_PKEY_CTX_free(pkey_ctx); |
3199 | s->s3->tmp.pms = pms; | |
3200 | s->s3->tmp.pmslen = pmslen; | |
3201 | ||
3202 | return 1; | |
3203 | err: | |
3204 | EVP_PKEY_CTX_free(pkey_ctx); | |
3205 | OPENSSL_clear_free(pms, pmslen); | |
3206 | EVP_MD_CTX_free(ukm_hash); | |
3207 | return 0; | |
3208 | #else | |
a2c2e000 MC |
3209 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3210 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3211 | return 0; |
3212 | #endif | |
3213 | } | |
3214 | ||
a2c2e000 | 3215 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3216 | { |
8b9546c7 | 3217 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3218 | unsigned char *abytes = NULL; |
3219 | ||
3220 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3221 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3222 | &abytes)) { | |
a2c2e000 MC |
3223 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3224 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3225 | return 0; |
3226 | } | |
f1ec23c0 MC |
3227 | BN_bn2bin(s->srp_ctx.A, abytes); |
3228 | ||
840a2bf8 MC |
3229 | OPENSSL_free(s->session->srp_username); |
3230 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3231 | if (s->session->srp_username == NULL) { | |
a2c2e000 MC |
3232 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3233 | ERR_R_MALLOC_FAILURE); | |
840a2bf8 MC |
3234 | return 0; |
3235 | } | |
3236 | ||
3237 | return 1; | |
3238 | #else | |
a2c2e000 MC |
3239 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3240 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3241 | return 0; |
3242 | #endif | |
3243 | } | |
3244 | ||
7cea05dc | 3245 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3246 | { |
13c0ec4a | 3247 | unsigned long alg_k; |
13c0ec4a | 3248 | |
f1ec23c0 | 3249 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3250 | |
a2c2e000 MC |
3251 | /* |
3252 | * All of the construct functions below call SSLfatal() if necessary so | |
3253 | * no need to do so here. | |
3254 | */ | |
13c0ec4a | 3255 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3256 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3257 | goto err; |
3258 | ||
f1ec23c0 | 3259 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3260 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3261 | goto err; |
a8c1c704 | 3262 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3263 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3264 | goto err; |
67ad5aab | 3265 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3266 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3267 | goto err; |
e00e0b3d | 3268 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3269 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3270 | goto err; |
840a2bf8 | 3271 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3272 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3273 | goto err; |
4a424545 | 3274 | } else if (!(alg_k & SSL_kPSK)) { |
a2c2e000 MC |
3275 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3276 | SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3277 | goto err; |
3278 | } | |
3279 | ||
b9908bf9 | 3280 | return 1; |
0f113f3e | 3281 | err: |
0bce0b02 | 3282 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3283 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3284 | #ifndef OPENSSL_NO_PSK |
3285 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3286 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3287 | #endif |
b9908bf9 MC |
3288 | return 0; |
3289 | } | |
3290 | ||
3291 | int tls_client_key_exchange_post_work(SSL *s) | |
3292 | { | |
3293 | unsigned char *pms = NULL; | |
3294 | size_t pmslen = 0; | |
3295 | ||
6f137370 MC |
3296 | pms = s->s3->tmp.pms; |
3297 | pmslen = s->s3->tmp.pmslen; | |
3298 | ||
b9908bf9 MC |
3299 | #ifndef OPENSSL_NO_SRP |
3300 | /* Check for SRP */ | |
3301 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3302 | if (!srp_generate_client_master_secret(s)) { | |
a2c2e000 | 3303 | /* SSLfatal() already called */ |
b9908bf9 MC |
3304 | goto err; |
3305 | } | |
3306 | return 1; | |
3307 | } | |
3308 | #endif | |
b9908bf9 MC |
3309 | |
3310 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
a2c2e000 MC |
3311 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3312 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
b9908bf9 MC |
3313 | goto err; |
3314 | } | |
3315 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3316 | /* SSLfatal() already called */ |
6f137370 MC |
3317 | /* ssl_generate_master_secret frees the pms even on error */ |
3318 | pms = NULL; | |
3319 | pmslen = 0; | |
b9908bf9 MC |
3320 | goto err; |
3321 | } | |
6f137370 MC |
3322 | pms = NULL; |
3323 | pmslen = 0; | |
473483d4 MC |
3324 | |
3325 | #ifndef OPENSSL_NO_SCTP | |
3326 | if (SSL_IS_DTLS(s)) { | |
3327 | unsigned char sctpauthkey[64]; | |
3328 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3329 | ||
3330 | /* | |
3331 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3332 | * used. | |
3333 | */ | |
141eb8c6 MC |
3334 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3335 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3336 | |
3337 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e | 3338 | sizeof(sctpauthkey), labelbuffer, |
a2c2e000 MC |
3339 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
3340 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
dd5a4279 MC |
3341 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, |
3342 | ERR_R_INTERNAL_ERROR); | |
473483d4 | 3343 | goto err; |
a2c2e000 | 3344 | } |
473483d4 MC |
3345 | |
3346 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3347 | sizeof(sctpauthkey), sctpauthkey); | |
3348 | } | |
3349 | #endif | |
3350 | ||
b9908bf9 MC |
3351 | return 1; |
3352 | err: | |
3353 | OPENSSL_clear_free(pms, pmslen); | |
3354 | s->s3->tmp.pms = NULL; | |
3355 | return 0; | |
0f113f3e | 3356 | } |
d02b48c6 | 3357 | |
0f113f3e MC |
3358 | /* |
3359 | * Check a certificate can be used for client authentication. Currently check | |
3360 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3361 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3362 | */ |
3363 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3364 | { |
0f113f3e | 3365 | /* If no suitable signature algorithm can't use certificate */ |
f63a17d6 | 3366 | if (!tls_choose_sigalg(s, 0) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3367 | return 0; |
3368 | /* | |
3369 | * If strict mode check suitability of chain before using it. This also | |
3370 | * adjusts suite B digest if necessary. | |
3371 | */ | |
3372 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3373 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3374 | return 0; | |
0f113f3e MC |
3375 | return 1; |
3376 | } | |
0d609395 | 3377 | |
be3583fa | 3378 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3379 | { |
3380 | X509 *x509 = NULL; | |
3381 | EVP_PKEY *pkey = NULL; | |
3382 | int i; | |
3383 | ||
b9908bf9 | 3384 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3385 | /* Let cert callback update client certificates if required */ |
3386 | if (s->cert->cert_cb) { | |
3387 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3388 | if (i < 0) { | |
3389 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3390 | return WORK_MORE_A; |
0f113f3e MC |
3391 | } |
3392 | if (i == 0) { | |
f63a17d6 MC |
3393 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3394 | SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, | |
3395 | SSL_R_CALLBACK_FAILED); | |
eb5fd03b | 3396 | return WORK_ERROR; |
0f113f3e MC |
3397 | } |
3398 | s->rwstate = SSL_NOTHING; | |
3399 | } | |
9d75dce3 TS |
3400 | if (ssl3_check_client_certificate(s)) { |
3401 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3402 | return WORK_FINISHED_STOP; | |
3403 | } | |
b9908bf9 | 3404 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3405 | } |
b9908bf9 MC |
3406 | |
3407 | /* Fall through to WORK_MORE_B */ | |
3408 | wst = WORK_MORE_B; | |
0f113f3e MC |
3409 | } |
3410 | ||
3411 | /* We need to get a client cert */ | |
b9908bf9 | 3412 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3413 | /* |
3414 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3415 | * return(-1); We then get retied later | |
3416 | */ | |
0f113f3e MC |
3417 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3418 | if (i < 0) { | |
3419 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3420 | return WORK_MORE_B; |
0f113f3e MC |
3421 | } |
3422 | s->rwstate = SSL_NOTHING; | |
3423 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3424 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3425 | i = 0; | |
3426 | } else if (i == 1) { | |
3427 | i = 0; | |
b9908bf9 | 3428 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3429 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3430 | } | |
3431 | ||
222561fe | 3432 | X509_free(x509); |
25aaa98a | 3433 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3434 | if (i && !ssl3_check_client_certificate(s)) |
3435 | i = 0; | |
3436 | if (i == 0) { | |
3437 | if (s->version == SSL3_VERSION) { | |
3438 | s->s3->tmp.cert_req = 0; | |
3439 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3440 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3441 | } else { |
3442 | s->s3->tmp.cert_req = 2; | |
124037fd | 3443 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3444 | /* SSLfatal() already called */ |
eb5fd03b | 3445 | return WORK_ERROR; |
dab18ab5 | 3446 | } |
0f113f3e MC |
3447 | } |
3448 | } | |
3449 | ||
9d75dce3 TS |
3450 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3451 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3452 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3453 | } |
3454 | ||
b9908bf9 | 3455 | /* Shouldn't ever get here */ |
a2c2e000 MC |
3456 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
3457 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3458 | return WORK_ERROR; |
3459 | } | |
3460 | ||
7cea05dc | 3461 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3462 | { |
9d75dce3 TS |
3463 | if (SSL_IS_TLS13(s)) { |
3464 | if (s->pha_context == NULL) { | |
3465 | /* no context available, add 0-length context */ | |
3466 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
3467 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3468 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3469 | return 0; | |
3470 | } | |
3471 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
3472 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3473 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3474 | return 0; | |
3475 | } | |
f63a17d6 MC |
3476 | } |
3477 | if (!ssl3_output_cert_chain(s, pkt, | |
3478 | (s->s3->tmp.cert_req == 2) ? NULL | |
3479 | : s->cert->key)) { | |
3480 | /* SSLfatal() already called */ | |
3481 | return 0; | |
f7e393be MC |
3482 | } |
3483 | ||
3484 | if (SSL_IS_TLS13(s) | |
3485 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3486 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3487 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3488 | /* |
a2c2e000 | 3489 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3490 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3491 | */ |
f63a17d6 | 3492 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, |
dd5a4279 | 3493 | SSL_R_CANNOT_CHANGE_CIPHER); |
c31ad0bb | 3494 | return 0; |
0f113f3e | 3495 | } |
b9908bf9 MC |
3496 | |
3497 | return 1; | |
0f113f3e MC |
3498 | } |
3499 | ||
36d16f8e | 3500 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3501 | { |
dd24857b DSH |
3502 | const SSL_CERT_LOOKUP *clu; |
3503 | size_t idx; | |
0f113f3e | 3504 | long alg_k, alg_a; |
d02b48c6 | 3505 | |
0f113f3e MC |
3506 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3507 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3508 | |
0f113f3e | 3509 | /* we don't have a certificate */ |
dd24857b DSH |
3510 | if (!(alg_a & SSL_aCERT)) |
3511 | return 1; | |
d02b48c6 | 3512 | |
0f113f3e | 3513 | /* This is the passed certificate */ |
dd24857b | 3514 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3515 | |
dd24857b DSH |
3516 | /* Check certificate is recognised and suitable for cipher */ |
3517 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
f63a17d6 MC |
3518 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3519 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3520 | SSL_R_MISSING_SIGNING_CERT); | |
3521 | return 0; | |
0f113f3e | 3522 | } |
0f113f3e | 3523 | |
dd24857b DSH |
3524 | #ifndef OPENSSL_NO_EC |
3525 | if (clu->amask & SSL_aECDSA) { | |
3526 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3527 | return 1; | |
f63a17d6 MC |
3528 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3529 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3530 | return 0; | |
0f113f3e | 3531 | } |
d02b48c6 | 3532 | #endif |
bc36ee62 | 3533 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3534 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 MC |
3535 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3536 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3537 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3538 | return 0; | |
0f113f3e | 3539 | } |
79df9d62 | 3540 | #endif |
bc36ee62 | 3541 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3542 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
f63a17d6 MC |
3543 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3544 | ERR_R_INTERNAL_ERROR); | |
3545 | return 0; | |
0f113f3e | 3546 | } |
d02b48c6 RE |
3547 | #endif |
3548 | ||
dd24857b | 3549 | return 1; |
0f113f3e MC |
3550 | } |
3551 | ||
e481f9b9 | 3552 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3553 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3554 | { |
15e6be6c MC |
3555 | size_t len, padding_len; |
3556 | unsigned char *padding = NULL; | |
15e6be6c | 3557 | |
aff8c126 | 3558 | len = s->ext.npn_len; |
b9908bf9 | 3559 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3560 | |
aff8c126 | 3561 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3562 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
a2c2e000 MC |
3563 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_NEXT_PROTO, |
3564 | ERR_R_INTERNAL_ERROR); | |
3565 | return 0; | |
15e6be6c MC |
3566 | } |
3567 | ||
3568 | memset(padding, 0, padding_len); | |
3569 | ||
b9908bf9 MC |
3570 | return 1; |
3571 | } | |
6434abbf | 3572 | #endif |
368888bc | 3573 | |
c7f47786 MC |
3574 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3575 | { | |
3576 | if (PACKET_remaining(pkt) > 0) { | |
3577 | /* should contain no data */ | |
f63a17d6 MC |
3578 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_REQ, |
3579 | SSL_R_LENGTH_MISMATCH); | |
c7f47786 MC |
3580 | return MSG_PROCESS_ERROR; |
3581 | } | |
3582 | ||
db0f35dd TS |
3583 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3584 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3585 | return MSG_PROCESS_FINISHED_READING; | |
3586 | } | |
3587 | ||
c7f47786 | 3588 | /* |
1f04f23e MC |
3589 | * This is a historical discrepancy (not in the RFC) maintained for |
3590 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3591 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3592 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3593 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3594 | */ |
3595 | if (SSL_IS_DTLS(s)) | |
3596 | SSL_renegotiate(s); | |
3597 | else | |
3598 | SSL_renegotiate_abbreviated(s); | |
3599 | ||
3600 | return MSG_PROCESS_FINISHED_READING; | |
3601 | } | |
3602 | ||
e46f2334 MC |
3603 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3604 | { | |
e46f2334 | 3605 | PACKET extensions; |
3434f40b | 3606 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3607 | |
26b9172a MC |
3608 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3609 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3610 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, |
3611 | SSL_R_LENGTH_MISMATCH); | |
e46f2334 MC |
3612 | goto err; |
3613 | } | |
3614 | ||
fe874d27 MC |
3615 | if (!tls_collect_extensions(s, &extensions, |
3616 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3617 | NULL, 1) |
fe874d27 | 3618 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3619 | rawexts, NULL, 0, 1)) { |
3620 | /* SSLfatal() already called */ | |
3434f40b | 3621 | goto err; |
f63a17d6 | 3622 | } |
3434f40b | 3623 | |
1b0286a3 | 3624 | OPENSSL_free(rawexts); |
e46f2334 MC |
3625 | return MSG_PROCESS_CONTINUE_READING; |
3626 | ||
3627 | err: | |
1b0286a3 | 3628 | OPENSSL_free(rawexts); |
e46f2334 MC |
3629 | return MSG_PROCESS_ERROR; |
3630 | } | |
3631 | ||
368888bc | 3632 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3633 | { |
3634 | int i = 0; | |
368888bc | 3635 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3636 | if (s->ctx->client_cert_engine) { |
3637 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3638 | SSL_get_client_CA_list(s), | |
3639 | px509, ppkey, NULL, NULL, NULL); | |
3640 | if (i != 0) | |
3641 | return i; | |
3642 | } | |
3643 | #endif | |
3644 | if (s->ctx->client_cert_cb) | |
3645 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3646 | return i; | |
3647 | } | |
d45ba43d | 3648 | |
ae2f7b37 | 3649 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3650 | { |
2c7b4dbc | 3651 | int i; |
aafec89c | 3652 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3653 | int empty_reneg_info_scsv = !s->renegotiate; |
1d0c08b4 | 3654 | |
d45ba43d | 3655 | /* Set disabled masks for this session */ |
1d0c08b4 MC |
3656 | if (!ssl_set_client_disabled(s)) { |
3657 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3658 | SSL_R_NO_PROTOCOLS_AVAILABLE); | |
3659 | return 0; | |
3660 | } | |
d45ba43d | 3661 | |
f63a17d6 MC |
3662 | if (sk == NULL) { |
3663 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3664 | ERR_R_INTERNAL_ERROR); | |
26a7d938 | 3665 | return 0; |
f63a17d6 | 3666 | } |
d45ba43d | 3667 | |
2c7b4dbc MC |
3668 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3669 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3670 | # error Max cipher length too short | |
3671 | # endif | |
3672 | /* | |
3673 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3674 | * chop number of supported ciphers to keep it well below this if we | |
3675 | * use TLS v1.2 | |
3676 | */ | |
3677 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3678 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3679 | else | |
3680 | #endif | |
3681 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3682 | maxlen = 0xfffe; | |
3683 | ||
3684 | if (empty_reneg_info_scsv) | |
3685 | maxlen -= 2; | |
3686 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3687 | maxlen -= 2; | |
3688 | ||
3689 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3690 | const SSL_CIPHER *c; | |
3691 | ||
d45ba43d MC |
3692 | c = sk_SSL_CIPHER_value(sk, i); |
3693 | /* Skip disabled ciphers */ | |
8af91fd9 | 3694 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3695 | continue; |
2c7b4dbc MC |
3696 | |
3697 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
f63a17d6 MC |
3698 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3699 | ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3700 | return 0; |
3701 | } | |
3702 | ||
aafec89c MC |
3703 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3704 | if (!maxverok) { | |
3705 | if (SSL_IS_DTLS(s)) { | |
3706 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3707 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3708 | maxverok = 1; | |
3709 | } else { | |
3710 | if (c->max_tls >= s->s3->tmp.max_ver | |
3711 | && c->min_tls <= s->s3->tmp.max_ver) | |
3712 | maxverok = 1; | |
3713 | } | |
3714 | } | |
3715 | ||
2c7b4dbc | 3716 | totlen += len; |
d45ba43d | 3717 | } |
2c7b4dbc | 3718 | |
aafec89c | 3719 | if (totlen == 0 || !maxverok) { |
f63a17d6 MC |
3720 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3721 | SSL_R_NO_CIPHERS_AVAILABLE); | |
aafec89c MC |
3722 | |
3723 | if (!maxverok) | |
3724 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3725 | "SSL/TLS version"); | |
3726 | ||
2c7b4dbc MC |
3727 | return 0; |
3728 | } | |
3729 | ||
3730 | if (totlen != 0) { | |
d45ba43d MC |
3731 | if (empty_reneg_info_scsv) { |
3732 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3733 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3734 | }; |
2c7b4dbc | 3735 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3736 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3737 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3738 | return 0; |
3739 | } | |
d45ba43d MC |
3740 | } |
3741 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3742 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3743 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3744 | }; |
2c7b4dbc | 3745 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3746 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3747 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3748 | return 0; |
3749 | } | |
d45ba43d MC |
3750 | } |
3751 | } | |
3752 | ||
2c7b4dbc | 3753 | return 1; |
d45ba43d | 3754 | } |
ef6c191b MC |
3755 | |
3756 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3757 | { | |
3758 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3759 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
635c8f77 MC |
3760 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3761 | SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3762 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
ef6c191b MC |
3763 | return 0; |
3764 | } | |
3765 | ||
3766 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3767 | return 1; | |
3768 | } |