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Commit | Line | Data |
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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
846e33c7 RS |
6 | * Licensed under the OpenSSL license (the "License"). You may not use |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
8ba708e5 | 14 | #include "../ssl_locl.h" |
61ae935a | 15 | #include "statem_locl.h" |
ec577822 BM |
16 | #include <openssl/buffer.h> |
17 | #include <openssl/rand.h> | |
18 | #include <openssl/objects.h> | |
19 | #include <openssl/evp.h> | |
dbad1690 | 20 | #include <openssl/md5.h> |
3c27208f | 21 | #include <openssl/dh.h> |
d095b68d | 22 | #include <openssl/bn.h> |
3c27208f | 23 | #include <openssl/engine.h> |
f9b3bff6 | 24 | |
3847d426 | 25 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt); |
e46f2334 MC |
26 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt); |
27 | ||
7ab09630 | 28 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 29 | static int key_exchange_expected(SSL *s); |
d45ba43d | 30 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
ae2f7b37 | 31 | WPACKET *pkt); |
ea262260 | 32 | |
61ae935a MC |
33 | /* |
34 | * Is a CertificateRequest message allowed at the moment or not? | |
35 | * | |
36 | * Return values are: | |
37 | * 1: Yes | |
38 | * 0: No | |
39 | */ | |
7ab09630 | 40 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
41 | { |
42 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 43 | if ((s->version > SSL3_VERSION |
a230b26e EK |
44 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
45 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
46 | return 0; |
47 | ||
48 | return 1; | |
49 | } | |
50 | ||
51 | /* | |
a455d0f6 | 52 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
53 | * |
54 | * Return values are: | |
55 | * 1: Yes | |
56 | * 0: No | |
57 | */ | |
a455d0f6 | 58 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
59 | { |
60 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
61 | ||
62 | /* | |
63 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 64 | * ciphersuite or for SRP |
61ae935a | 65 | */ |
a455d0f6 MC |
66 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
67 | | SSL_kSRP)) { | |
68 | return 1; | |
61ae935a MC |
69 | } |
70 | ||
a455d0f6 | 71 | return 0; |
61ae935a MC |
72 | } |
73 | ||
0f1e51ea MC |
74 | /* |
75 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
76 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
77 | * server. The message type that the server has sent is provided in |mt|. The | |
78 | * current state is in |s->statem.hand_state|. | |
79 | * | |
94ed2c67 MC |
80 | * Return values are 1 for success (transition allowed) and 0 on error |
81 | * (transition not allowed) | |
0f1e51ea MC |
82 | */ |
83 | static int ossl_statem_client13_read_transition(SSL *s, int mt) | |
84 | { | |
85 | OSSL_STATEM *st = &s->statem; | |
86 | ||
87 | /* | |
88 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
89 | * yet negotiated TLSv1.3 at that point so that is handled by | |
90 | * ossl_statem_client_read_transition() | |
91 | */ | |
92 | ||
93 | switch (st->hand_state) { | |
94 | default: | |
95 | break; | |
96 | ||
3847d426 MC |
97 | case TLS_ST_CW_CLNT_HELLO: |
98 | /* | |
99 | * This must a ClientHello following a HelloRetryRequest, so the only | |
100 | * thing we can get now is a ServerHello. | |
101 | */ | |
102 | if (mt == SSL3_MT_SERVER_HELLO) { | |
103 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
104 | return 1; | |
105 | } | |
106 | break; | |
107 | ||
0f1e51ea | 108 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
109 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
110 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
111 | return 1; | |
112 | } | |
113 | break; | |
114 | ||
115 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 116 | if (s->hit) { |
92760c21 MC |
117 | if (mt == SSL3_MT_FINISHED) { |
118 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
119 | return 1; |
120 | } | |
121 | } else { | |
92760c21 MC |
122 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
123 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
124 | return 1; | |
f5ca0b04 MC |
125 | } |
126 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
127 | st->hand_state = TLS_ST_CR_CERT; |
128 | return 1; | |
129 | } | |
130 | } | |
131 | break; | |
132 | ||
92760c21 MC |
133 | case TLS_ST_CR_CERT_REQ: |
134 | if (mt == SSL3_MT_CERTIFICATE) { | |
135 | st->hand_state = TLS_ST_CR_CERT; | |
136 | return 1; | |
137 | } | |
138 | break; | |
139 | ||
0f1e51ea | 140 | case TLS_ST_CR_CERT: |
2c5dfdc3 MC |
141 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
142 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
143 | return 1; | |
144 | } | |
145 | break; | |
146 | ||
147 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
148 | if (mt == SSL3_MT_FINISHED) { |
149 | st->hand_state = TLS_ST_CR_FINISHED; | |
150 | return 1; | |
151 | } | |
152 | break; | |
cc2455bf MC |
153 | |
154 | case TLS_ST_OK: | |
155 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
156 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
157 | return 1; | |
158 | } | |
e1c3de44 MC |
159 | if (mt == SSL3_MT_KEY_UPDATE) { |
160 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
161 | return 1; | |
162 | } | |
cc2455bf | 163 | break; |
0f1e51ea MC |
164 | } |
165 | ||
0f1e51ea | 166 | /* No valid transition found */ |
0f1e51ea MC |
167 | return 0; |
168 | } | |
169 | ||
61ae935a | 170 | /* |
8481f583 MC |
171 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
172 | * handshake state transitions when the client is reading messages from the | |
173 | * server. The message type that the server has sent is provided in |mt|. The | |
174 | * current state is in |s->statem.hand_state|. | |
61ae935a | 175 | * |
94ed2c67 MC |
176 | * Return values are 1 for success (transition allowed) and 0 on error |
177 | * (transition not allowed) | |
61ae935a | 178 | */ |
8481f583 | 179 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 180 | { |
d6f1a6e9 | 181 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 182 | int ske_expected; |
61ae935a | 183 | |
0f1e51ea | 184 | /* |
3847d426 MC |
185 | * Note that after writing the first ClientHello we don't know what version |
186 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 187 | */ |
f5ca0b04 | 188 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
189 | if (!ossl_statem_client13_read_transition(s, mt)) |
190 | goto err; | |
191 | return 1; | |
192 | } | |
0f1e51ea | 193 | |
a230b26e | 194 | switch (st->hand_state) { |
f3b3d7f0 RS |
195 | default: |
196 | break; | |
197 | ||
61ae935a MC |
198 | case TLS_ST_CW_CLNT_HELLO: |
199 | if (mt == SSL3_MT_SERVER_HELLO) { | |
200 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
201 | return 1; | |
202 | } | |
203 | ||
204 | if (SSL_IS_DTLS(s)) { | |
205 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
206 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
207 | return 1; | |
208 | } | |
3847d426 MC |
209 | } else { |
210 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
211 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
212 | return 1; | |
213 | } | |
61ae935a MC |
214 | } |
215 | break; | |
216 | ||
d7f8783f | 217 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
218 | /* |
219 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
220 | * data. The only thing allowed now is a ServerHello or a | |
221 | * HelloRetryRequest. | |
222 | */ | |
223 | if (mt == SSL3_MT_SERVER_HELLO) { | |
224 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
225 | return 1; | |
226 | } | |
227 | if (mt == SSL3_MT_HELLO_RETRY_REQUEST) { | |
228 | st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST; | |
229 | return 1; | |
230 | } | |
231 | break; | |
232 | ||
61ae935a MC |
233 | case TLS_ST_CR_SRVR_HELLO: |
234 | if (s->hit) { | |
aff8c126 | 235 | if (s->ext.ticket_expected) { |
61ae935a MC |
236 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
237 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
238 | return 1; | |
239 | } | |
240 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
241 | st->hand_state = TLS_ST_CR_CHANGE; | |
242 | return 1; | |
243 | } | |
244 | } else { | |
245 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
246 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
247 | return 1; | |
ad3819c2 | 248 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
249 | && s->ext.session_secret_cb != NULL |
250 | && s->session->ext.tick != NULL | |
a230b26e | 251 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
252 | /* |
253 | * Normally, we can tell if the server is resuming the session | |
254 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
255 | * the next server message after the ServerHello to determine if | |
256 | * the server is resuming. | |
257 | */ | |
258 | s->hit = 1; | |
259 | st->hand_state = TLS_ST_CR_CHANGE; | |
260 | return 1; | |
61ae935a | 261 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
a230b26e | 262 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
263 | if (mt == SSL3_MT_CERTIFICATE) { |
264 | st->hand_state = TLS_ST_CR_CERT; | |
265 | return 1; | |
266 | } | |
267 | } else { | |
a455d0f6 | 268 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
269 | /* SKE is optional for some PSK ciphersuites */ |
270 | if (ske_expected | |
a230b26e EK |
271 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
272 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
a455d0f6 MC |
273 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
274 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
275 | return 1; | |
276 | } | |
277 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
278 | && cert_req_allowed(s)) { |
279 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
280 | return 1; | |
a455d0f6 | 281 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
282 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
283 | return 1; | |
61ae935a MC |
284 | } |
285 | } | |
286 | } | |
287 | break; | |
288 | ||
289 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
290 | /* |
291 | * The CertificateStatus message is optional even if | |
aff8c126 | 292 | * |ext.status_expected| is set |
bb1aaab4 | 293 | */ |
aff8c126 | 294 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
295 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
296 | return 1; | |
a455d0f6 MC |
297 | } |
298 | /* Fall through */ | |
299 | ||
300 | case TLS_ST_CR_CERT_STATUS: | |
301 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 302 | /* SKE is optional for some PSK ciphersuites */ |
a230b26e EK |
303 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) |
304 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
305 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
306 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
307 | return 1; | |
61ae935a | 308 | } |
672f3337 | 309 | goto err; |
61ae935a | 310 | } |
a455d0f6 | 311 | /* Fall through */ |
61ae935a | 312 | |
a455d0f6 MC |
313 | case TLS_ST_CR_KEY_EXCH: |
314 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
315 | if (cert_req_allowed(s)) { | |
61ae935a MC |
316 | st->hand_state = TLS_ST_CR_CERT_REQ; |
317 | return 1; | |
61ae935a | 318 | } |
672f3337 | 319 | goto err; |
61ae935a | 320 | } |
a455d0f6 | 321 | /* Fall through */ |
61ae935a MC |
322 | |
323 | case TLS_ST_CR_CERT_REQ: | |
324 | if (mt == SSL3_MT_SERVER_DONE) { | |
325 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
326 | return 1; | |
327 | } | |
328 | break; | |
329 | ||
330 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 331 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
332 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
333 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
334 | return 1; | |
335 | } | |
61ae935a MC |
336 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
337 | st->hand_state = TLS_ST_CR_CHANGE; | |
338 | return 1; | |
339 | } | |
340 | break; | |
341 | ||
342 | case TLS_ST_CR_SESSION_TICKET: | |
343 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
344 | st->hand_state = TLS_ST_CR_CHANGE; | |
345 | return 1; | |
346 | } | |
347 | break; | |
348 | ||
349 | case TLS_ST_CR_CHANGE: | |
350 | if (mt == SSL3_MT_FINISHED) { | |
351 | st->hand_state = TLS_ST_CR_FINISHED; | |
352 | return 1; | |
353 | } | |
354 | break; | |
c7f47786 MC |
355 | |
356 | case TLS_ST_OK: | |
4004ce5f | 357 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
358 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
359 | return 1; | |
360 | } | |
361 | break; | |
61ae935a MC |
362 | } |
363 | ||
672f3337 | 364 | err: |
61ae935a | 365 | /* No valid transition found */ |
f63a17d6 MC |
366 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
367 | SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, | |
368 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
369 | return 0; |
370 | } | |
371 | ||
372 | /* | |
0f1e51ea MC |
373 | * ossl_statem_client13_write_transition() works out what handshake state to |
374 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
375 | * server. | |
0f1e51ea MC |
376 | */ |
377 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
378 | { | |
379 | OSSL_STATEM *st = &s->statem; | |
380 | ||
381 | /* | |
3847d426 MC |
382 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
383 | * TLSv1.3 yet at that point. They are handled by | |
384 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
385 | */ |
386 | switch (st->hand_state) { | |
387 | default: | |
388 | /* Shouldn't happen */ | |
a2c2e000 MC |
389 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
390 | SSL_F_OSSL_STATEM_CLIENT13_WRITE_TRANSITION, | |
391 | ERR_R_INTERNAL_ERROR); | |
0f1e51ea MC |
392 | return WRITE_TRAN_ERROR; |
393 | ||
3847d426 MC |
394 | case TLS_ST_CW_CLNT_HELLO: |
395 | /* We only hit this in the case of HelloRetryRequest */ | |
396 | return WRITE_TRAN_FINISHED; | |
397 | ||
92760c21 | 398 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
399 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
400 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 401 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
564547e4 MC |
402 | else |
403 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT | |
404 | : TLS_ST_CW_FINISHED; | |
405 | return WRITE_TRAN_CONTINUE; | |
406 | ||
d7f8783f | 407 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
408 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
409 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
410 | return WRITE_TRAN_CONTINUE; | |
411 | } | |
412 | /* Fall through */ | |
413 | ||
414 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
94ed2c67 | 415 | st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT |
92760c21 | 416 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
417 | return WRITE_TRAN_CONTINUE; |
418 | ||
419 | case TLS_ST_CW_CERT: | |
420 | /* If a non-empty Certificate we also send CertificateVerify */ | |
94ed2c67 | 421 | st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 422 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
423 | return WRITE_TRAN_CONTINUE; |
424 | ||
425 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
426 | st->hand_state = TLS_ST_CW_FINISHED; |
427 | return WRITE_TRAN_CONTINUE; | |
428 | ||
e1c3de44 | 429 | case TLS_ST_CR_KEY_UPDATE: |
5bf47933 MC |
430 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
431 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
432 | return WRITE_TRAN_CONTINUE; | |
433 | } | |
434 | /* Fall through */ | |
435 | ||
9412b3ad | 436 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 437 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 438 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 439 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 440 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
441 | |
442 | case TLS_ST_OK: | |
9412b3ad MC |
443 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
444 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
445 | return WRITE_TRAN_CONTINUE; | |
446 | } | |
447 | ||
448 | /* Try to read from the server instead */ | |
cc2455bf | 449 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
450 | } |
451 | } | |
452 | ||
453 | /* | |
454 | * ossl_statem_client_write_transition() works out what handshake state to | |
455 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 456 | */ |
8481f583 | 457 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 458 | { |
d6f1a6e9 | 459 | OSSL_STATEM *st = &s->statem; |
61ae935a | 460 | |
0f1e51ea MC |
461 | /* |
462 | * Note that immediately before/after a ClientHello we don't know what | |
463 | * version we are going to negotiate yet, so we don't take this branch until | |
464 | * later | |
465 | */ | |
f5ca0b04 | 466 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
467 | return ossl_statem_client13_write_transition(s); |
468 | ||
a230b26e | 469 | switch (st->hand_state) { |
f3b3d7f0 RS |
470 | default: |
471 | /* Shouldn't happen */ | |
a2c2e000 MC |
472 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
473 | SSL_F_OSSL_STATEM_CLIENT_WRITE_TRANSITION, | |
474 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
475 | return WRITE_TRAN_ERROR; |
476 | ||
a230b26e | 477 | case TLS_ST_OK: |
c7f47786 MC |
478 | if (!s->renegotiate) { |
479 | /* | |
480 | * We haven't requested a renegotiation ourselves so we must have | |
481 | * received a message from the server. Better read it. | |
482 | */ | |
483 | return WRITE_TRAN_FINISHED; | |
484 | } | |
018fcbec BE |
485 | /* Renegotiation */ |
486 | /* fall thru */ | |
a230b26e EK |
487 | case TLS_ST_BEFORE: |
488 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
489 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 490 | |
a230b26e | 491 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
492 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
493 | /* | |
494 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
495 | * actually selected a version yet. | |
496 | */ | |
d7f8783f | 497 | st->hand_state = TLS_ST_EARLY_DATA; |
49e7fe12 MC |
498 | return WRITE_TRAN_CONTINUE; |
499 | } | |
a230b26e EK |
500 | /* |
501 | * No transition at the end of writing because we don't know what | |
502 | * we will be sent | |
503 | */ | |
504 | return WRITE_TRAN_FINISHED; | |
61ae935a | 505 | |
a2b97bdf MC |
506 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
507 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
508 | return WRITE_TRAN_CONTINUE; | |
509 | ||
d7f8783f | 510 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
511 | return WRITE_TRAN_FINISHED; |
512 | ||
a230b26e EK |
513 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
514 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
515 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 516 | |
a230b26e EK |
517 | case TLS_ST_CR_SRVR_DONE: |
518 | if (s->s3->tmp.cert_req) | |
519 | st->hand_state = TLS_ST_CW_CERT; | |
520 | else | |
61ae935a | 521 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 522 | return WRITE_TRAN_CONTINUE; |
61ae935a | 523 | |
a230b26e EK |
524 | case TLS_ST_CW_CERT: |
525 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
526 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 527 | |
a230b26e EK |
528 | case TLS_ST_CW_KEY_EXCH: |
529 | /* | |
530 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
531 | * sent, but no verify packet is sent | |
532 | */ | |
533 | /* | |
534 | * XXX: For now, we do not support client authentication in ECDH | |
535 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
536 | * need to skip the certificate verify message when client's | |
537 | * ECDH public key is sent inside the client certificate. | |
538 | */ | |
539 | if (s->s3->tmp.cert_req == 1) { | |
540 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
541 | } else { | |
61ae935a | 542 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
543 | } |
544 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
545 | st->hand_state = TLS_ST_CW_CHANGE; | |
546 | } | |
547 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 548 | |
a230b26e EK |
549 | case TLS_ST_CW_CERT_VRFY: |
550 | st->hand_state = TLS_ST_CW_CHANGE; | |
551 | return WRITE_TRAN_CONTINUE; | |
552 | ||
553 | case TLS_ST_CW_CHANGE: | |
61ae935a | 554 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
4004ce5f MC |
555 | st-> |
556 | hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 557 | #else |
aff8c126 | 558 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
559 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
560 | else | |
561 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 562 | #endif |
a230b26e | 563 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
564 | |
565 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
566 | case TLS_ST_CW_NEXT_PROTO: |
567 | st->hand_state = TLS_ST_CW_FINISHED; | |
568 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
569 | #endif |
570 | ||
a230b26e EK |
571 | case TLS_ST_CW_FINISHED: |
572 | if (s->hit) { | |
573 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
574 | return WRITE_TRAN_CONTINUE; |
575 | } else { | |
576 | return WRITE_TRAN_FINISHED; | |
577 | } | |
61ae935a | 578 | |
a230b26e EK |
579 | case TLS_ST_CR_FINISHED: |
580 | if (s->hit) { | |
581 | st->hand_state = TLS_ST_CW_CHANGE; | |
582 | return WRITE_TRAN_CONTINUE; | |
583 | } else { | |
584 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
585 | return WRITE_TRAN_CONTINUE; |
586 | } | |
c7f47786 MC |
587 | |
588 | case TLS_ST_CR_HELLO_REQ: | |
589 | /* | |
590 | * If we can renegotiate now then do so, otherwise wait for a more | |
591 | * convenient time. | |
592 | */ | |
593 | if (ssl3_renegotiate_check(s, 1)) { | |
594 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 595 | /* SSLfatal() already called */ |
c7f47786 MC |
596 | return WRITE_TRAN_ERROR; |
597 | } | |
598 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
599 | return WRITE_TRAN_CONTINUE; | |
600 | } | |
601 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 602 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
603 | } |
604 | } | |
605 | ||
606 | /* | |
607 | * Perform any pre work that needs to be done prior to sending a message from | |
608 | * the client to the server. | |
609 | */ | |
8481f583 | 610 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 611 | { |
d6f1a6e9 | 612 | OSSL_STATEM *st = &s->statem; |
61ae935a | 613 | |
a230b26e | 614 | switch (st->hand_state) { |
f3b3d7f0 RS |
615 | default: |
616 | /* No pre work to be done */ | |
617 | break; | |
618 | ||
61ae935a MC |
619 | case TLS_ST_CW_CLNT_HELLO: |
620 | s->shutdown = 0; | |
621 | if (SSL_IS_DTLS(s)) { | |
622 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f | 623 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 624 | /* SSLfatal() already called */ |
2c4a056f MC |
625 | return WORK_ERROR; |
626 | } | |
61ae935a MC |
627 | } |
628 | break; | |
629 | ||
61ae935a MC |
630 | case TLS_ST_CW_CHANGE: |
631 | if (SSL_IS_DTLS(s)) { | |
632 | if (s->hit) { | |
633 | /* | |
634 | * We're into the last flight so we don't retransmit these | |
635 | * messages unless we need to. | |
636 | */ | |
637 | st->use_timer = 0; | |
638 | } | |
639 | #ifndef OPENSSL_NO_SCTP | |
a2c2e000 MC |
640 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
641 | /* Calls SSLfatal() as required */ | |
61ae935a | 642 | return dtls_wait_for_dry(s); |
a2c2e000 | 643 | } |
61ae935a MC |
644 | #endif |
645 | } | |
f3b3d7f0 | 646 | break; |
61ae935a | 647 | |
d7f8783f | 648 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
649 | /* |
650 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
651 | * attempt to write early data before calling SSL_read() then we press | |
652 | * on with the handshake. Otherwise we pause here. | |
653 | */ | |
654 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
655 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
656 | return WORK_FINISHED_CONTINUE; | |
657 | /* Fall through */ | |
658 | ||
659 | case TLS_ST_EARLY_DATA: | |
61ae935a | 660 | case TLS_ST_OK: |
a2c2e000 | 661 | /* Calls SSLfatal() as required */ |
30f05b19 | 662 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
663 | } |
664 | ||
665 | return WORK_FINISHED_CONTINUE; | |
666 | } | |
667 | ||
668 | /* | |
669 | * Perform any work that needs to be done after sending a message from the | |
670 | * client to the server. | |
671 | */ | |
8481f583 | 672 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 673 | { |
d6f1a6e9 | 674 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
675 | |
676 | s->init_num = 0; | |
677 | ||
a230b26e | 678 | switch (st->hand_state) { |
f3b3d7f0 RS |
679 | default: |
680 | /* No post work to be done */ | |
681 | break; | |
682 | ||
61ae935a | 683 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 684 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 685 | return WORK_MORE_A; |
46417569 | 686 | |
61ae935a MC |
687 | if (SSL_IS_DTLS(s)) { |
688 | /* Treat the next message as the first packet */ | |
689 | s->first_packet = 1; | |
690 | } | |
6cb42265 MC |
691 | |
692 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
693 | && s->max_early_data > 0) { | |
694 | /* | |
695 | * We haven't selected TLSv1.3 yet so we don't call the change | |
696 | * cipher state function associated with the SSL_METHOD. Instead | |
697 | * we call tls13_change_cipher_state() directly. | |
698 | */ | |
699 | if (!tls13_change_cipher_state(s, | |
a2c2e000 MC |
700 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
701 | /* SSLfatal() already called */ | |
1ea4d09a | 702 | return WORK_ERROR; |
a2c2e000 | 703 | } |
6cb42265 | 704 | } |
61ae935a MC |
705 | break; |
706 | ||
ef6c191b MC |
707 | case TLS_ST_CW_END_OF_EARLY_DATA: |
708 | /* | |
709 | * We set the enc_write_ctx back to NULL because we may end up writing | |
710 | * in cleartext again if we get a HelloRetryRequest from the server. | |
711 | */ | |
712 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
713 | s->enc_write_ctx = NULL; | |
714 | break; | |
715 | ||
61ae935a | 716 | case TLS_ST_CW_KEY_EXCH: |
a2c2e000 MC |
717 | if (tls_client_key_exchange_post_work(s) == 0) { |
718 | /* SSLfatal() already called */ | |
61ae935a | 719 | return WORK_ERROR; |
a2c2e000 | 720 | } |
61ae935a MC |
721 | break; |
722 | ||
723 | case TLS_ST_CW_CHANGE: | |
724 | s->session->cipher = s->s3->tmp.new_cipher; | |
725 | #ifdef OPENSSL_NO_COMP | |
726 | s->session->compress_meth = 0; | |
727 | #else | |
728 | if (s->s3->tmp.new_compression == NULL) | |
729 | s->session->compress_meth = 0; | |
730 | else | |
731 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
732 | #endif | |
a2c2e000 MC |
733 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
734 | /* SSLfatal() already called */ | |
61ae935a | 735 | return WORK_ERROR; |
a2c2e000 | 736 | } |
61ae935a MC |
737 | |
738 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
739 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
740 | /* SSLfatal() already called */ | |
61ae935a | 741 | return WORK_ERROR; |
a2c2e000 | 742 | } |
61ae935a MC |
743 | |
744 | if (SSL_IS_DTLS(s)) { | |
745 | #ifndef OPENSSL_NO_SCTP | |
746 | if (s->hit) { | |
747 | /* | |
748 | * Change to new shared key of SCTP-Auth, will be ignored if | |
749 | * no SCTP used. | |
750 | */ | |
751 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
752 | 0, NULL); | |
753 | } | |
754 | #endif | |
755 | ||
756 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
757 | } | |
758 | break; | |
759 | ||
760 | case TLS_ST_CW_FINISHED: | |
761 | #ifndef OPENSSL_NO_SCTP | |
762 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
763 | /* | |
764 | * Change to new shared key of SCTP-Auth, will be ignored if | |
765 | * no SCTP used. | |
766 | */ | |
767 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
768 | 0, NULL); | |
769 | } | |
770 | #endif | |
771 | if (statem_flush(s) != 1) | |
772 | return WORK_MORE_B; | |
92760c21 MC |
773 | |
774 | if (SSL_IS_TLS13(s)) { | |
775 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a2c2e000 MC |
776 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
777 | /* SSLfatal() already called */ | |
778 | return WORK_ERROR; | |
779 | } | |
92760c21 | 780 | } |
61ae935a | 781 | break; |
9412b3ad MC |
782 | |
783 | case TLS_ST_CW_KEY_UPDATE: | |
784 | if (statem_flush(s) != 1) | |
785 | return WORK_MORE_A; | |
a2c2e000 MC |
786 | if (!tls13_update_key(s, 1)) { |
787 | /* SSLfatal() already called */ | |
57389a32 | 788 | return WORK_ERROR; |
a2c2e000 | 789 | } |
9412b3ad | 790 | break; |
61ae935a MC |
791 | } |
792 | ||
793 | return WORK_FINISHED_CONTINUE; | |
794 | } | |
795 | ||
796 | /* | |
6392fb8e MC |
797 | * Get the message construction function and message type for sending from the |
798 | * client | |
61ae935a MC |
799 | * |
800 | * Valid return values are: | |
801 | * 1: Success | |
802 | * 0: Error | |
803 | */ | |
6392fb8e | 804 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 805 | confunc_f *confunc, int *mt) |
61ae935a | 806 | { |
d6f1a6e9 | 807 | OSSL_STATEM *st = &s->statem; |
61ae935a | 808 | |
4a01c59f MC |
809 | switch (st->hand_state) { |
810 | default: | |
811 | /* Shouldn't happen */ | |
f63a17d6 MC |
812 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
813 | SSL_F_OSSL_STATEM_CLIENT_CONSTRUCT_MESSAGE, | |
814 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
815 | return 0; |
816 | ||
817 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 818 | if (SSL_IS_DTLS(s)) |
6392fb8e | 819 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 820 | else |
6392fb8e MC |
821 | *confunc = tls_construct_change_cipher_spec; |
822 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
823 | break; |
824 | ||
825 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
826 | *confunc = tls_construct_client_hello; |
827 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
828 | break; |
829 | ||
ef6c191b MC |
830 | case TLS_ST_CW_END_OF_EARLY_DATA: |
831 | *confunc = tls_construct_end_of_early_data; | |
832 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
833 | break; | |
834 | ||
835 | case TLS_ST_PENDING_EARLY_DATA_END: | |
836 | *confunc = NULL; | |
837 | *mt = SSL3_MT_DUMMY; | |
838 | break; | |
839 | ||
4a01c59f | 840 | case TLS_ST_CW_CERT: |
6392fb8e MC |
841 | *confunc = tls_construct_client_certificate; |
842 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
843 | break; |
844 | ||
845 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
846 | *confunc = tls_construct_client_key_exchange; |
847 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
848 | break; |
849 | ||
850 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 851 | *confunc = tls_construct_cert_verify; |
6392fb8e | 852 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 853 | break; |
61ae935a MC |
854 | |
855 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 856 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
857 | *confunc = tls_construct_next_proto; |
858 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 859 | break; |
61ae935a | 860 | #endif |
4a01c59f | 861 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
862 | *confunc = tls_construct_finished; |
863 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 864 | break; |
9412b3ad MC |
865 | |
866 | case TLS_ST_CW_KEY_UPDATE: | |
867 | *confunc = tls_construct_key_update; | |
868 | *mt = SSL3_MT_KEY_UPDATE; | |
869 | break; | |
4a01c59f | 870 | } |
5923ad4b | 871 | |
5923ad4b | 872 | return 1; |
61ae935a MC |
873 | } |
874 | ||
875 | /* | |
876 | * Returns the maximum allowed length for the current message that we are | |
877 | * reading. Excludes the message header. | |
878 | */ | |
eda75751 | 879 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 880 | { |
d6f1a6e9 | 881 | OSSL_STATEM *st = &s->statem; |
61ae935a | 882 | |
a230b26e | 883 | switch (st->hand_state) { |
f3b3d7f0 RS |
884 | default: |
885 | /* Shouldn't happen */ | |
886 | return 0; | |
887 | ||
a230b26e EK |
888 | case TLS_ST_CR_SRVR_HELLO: |
889 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 890 | |
a230b26e EK |
891 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
892 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 893 | |
3847d426 MC |
894 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
895 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
896 | ||
a230b26e EK |
897 | case TLS_ST_CR_CERT: |
898 | return s->max_cert_list; | |
61ae935a | 899 | |
2c5dfdc3 MC |
900 | case TLS_ST_CR_CERT_VRFY: |
901 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
902 | ||
a230b26e EK |
903 | case TLS_ST_CR_CERT_STATUS: |
904 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 905 | |
a230b26e EK |
906 | case TLS_ST_CR_KEY_EXCH: |
907 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 908 | |
a230b26e EK |
909 | case TLS_ST_CR_CERT_REQ: |
910 | /* | |
911 | * Set to s->max_cert_list for compatibility with previous releases. In | |
912 | * practice these messages can get quite long if servers are configured | |
913 | * to provide a long list of acceptable CAs | |
914 | */ | |
915 | return s->max_cert_list; | |
61ae935a | 916 | |
a230b26e EK |
917 | case TLS_ST_CR_SRVR_DONE: |
918 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 919 | |
a230b26e EK |
920 | case TLS_ST_CR_CHANGE: |
921 | if (s->version == DTLS1_BAD_VER) | |
922 | return 3; | |
923 | return CCS_MAX_LENGTH; | |
61ae935a | 924 | |
a230b26e EK |
925 | case TLS_ST_CR_SESSION_TICKET: |
926 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 927 | |
a230b26e EK |
928 | case TLS_ST_CR_FINISHED: |
929 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
930 | |
931 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
932 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
933 | |
934 | case TLS_ST_CR_KEY_UPDATE: | |
935 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 936 | } |
61ae935a MC |
937 | } |
938 | ||
939 | /* | |
940 | * Process a message that the client has been received from the server. | |
941 | */ | |
8481f583 | 942 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 943 | { |
d6f1a6e9 | 944 | OSSL_STATEM *st = &s->statem; |
61ae935a | 945 | |
a230b26e | 946 | switch (st->hand_state) { |
f3b3d7f0 RS |
947 | default: |
948 | /* Shouldn't happen */ | |
a2c2e000 MC |
949 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
950 | SSL_F_OSSL_STATEM_CLIENT_PROCESS_MESSAGE, | |
951 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
952 | return MSG_PROCESS_ERROR; |
953 | ||
a230b26e EK |
954 | case TLS_ST_CR_SRVR_HELLO: |
955 | return tls_process_server_hello(s, pkt); | |
61ae935a | 956 | |
a230b26e EK |
957 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
958 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 959 | |
3847d426 MC |
960 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
961 | return tls_process_hello_retry_request(s, pkt); | |
962 | ||
a230b26e EK |
963 | case TLS_ST_CR_CERT: |
964 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 965 | |
2c5dfdc3 MC |
966 | case TLS_ST_CR_CERT_VRFY: |
967 | return tls_process_cert_verify(s, pkt); | |
968 | ||
a230b26e EK |
969 | case TLS_ST_CR_CERT_STATUS: |
970 | return tls_process_cert_status(s, pkt); | |
61ae935a | 971 | |
a230b26e EK |
972 | case TLS_ST_CR_KEY_EXCH: |
973 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 974 | |
a230b26e EK |
975 | case TLS_ST_CR_CERT_REQ: |
976 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 977 | |
a230b26e EK |
978 | case TLS_ST_CR_SRVR_DONE: |
979 | return tls_process_server_done(s, pkt); | |
61ae935a | 980 | |
a230b26e EK |
981 | case TLS_ST_CR_CHANGE: |
982 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 983 | |
a230b26e EK |
984 | case TLS_ST_CR_SESSION_TICKET: |
985 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 986 | |
a230b26e EK |
987 | case TLS_ST_CR_FINISHED: |
988 | return tls_process_finished(s, pkt); | |
e46f2334 | 989 | |
c7f47786 MC |
990 | case TLS_ST_CR_HELLO_REQ: |
991 | return tls_process_hello_req(s, pkt); | |
992 | ||
e46f2334 MC |
993 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
994 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
995 | |
996 | case TLS_ST_CR_KEY_UPDATE: | |
997 | return tls_process_key_update(s, pkt); | |
61ae935a | 998 | } |
61ae935a MC |
999 | } |
1000 | ||
1001 | /* | |
1002 | * Perform any further processing required following the receipt of a message | |
1003 | * from the server | |
1004 | */ | |
8481f583 | 1005 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1006 | { |
d6f1a6e9 | 1007 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1008 | |
a230b26e | 1009 | switch (st->hand_state) { |
f3b3d7f0 RS |
1010 | default: |
1011 | /* Shouldn't happen */ | |
a2c2e000 MC |
1012 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1013 | SSL_F_OSSL_STATEM_CLIENT_POST_PROCESS_MESSAGE, | |
1014 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1015 | return WORK_ERROR; |
1016 | ||
05c4f1d5 MC |
1017 | case TLS_ST_CR_CERT_REQ: |
1018 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1019 | } |
61ae935a MC |
1020 | } |
1021 | ||
7cea05dc | 1022 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 1023 | { |
2c7b4dbc | 1024 | unsigned char *p; |
ec60ccc1 MC |
1025 | size_t sess_id_len; |
1026 | int i, protverr; | |
09b6c2ef | 1027 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1028 | SSL_COMP *comp; |
1029 | #endif | |
b9908bf9 | 1030 | SSL_SESSION *sess = s->session; |
0f113f3e | 1031 | |
7cea05dc | 1032 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc | 1033 | /* Should not happen */ |
f63a17d6 MC |
1034 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1035 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1036 | return 0; |
2c7b4dbc | 1037 | } |
0f113f3e | 1038 | |
b9908bf9 | 1039 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1040 | protverr = ssl_set_client_hello_version(s); |
1041 | if (protverr != 0) { | |
f63a17d6 MC |
1042 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1043 | protverr); | |
7cea05dc | 1044 | return 0; |
4fa52141 | 1045 | } |
0f113f3e | 1046 | |
e586eac8 MC |
1047 | if (sess == NULL |
1048 | || !ssl_version_supported(s, sess->ssl_version) | |
1049 | || !SSL_SESSION_is_resumable(sess)) { | |
f63a17d6 MC |
1050 | if (!ssl_get_new_session(s, 0)) { |
1051 | /* SSLfatal() already called */ | |
7cea05dc | 1052 | return 0; |
f63a17d6 | 1053 | } |
b9908bf9 MC |
1054 | } |
1055 | /* else use the pre-loaded session */ | |
0f113f3e | 1056 | |
b9908bf9 | 1057 | p = s->s3->client_random; |
0f113f3e | 1058 | |
b9908bf9 MC |
1059 | /* |
1060 | * for DTLS if client_random is initialized, reuse it, we are | |
1061 | * required to use same upon reply to HelloVerify | |
1062 | */ | |
1063 | if (SSL_IS_DTLS(s)) { | |
1064 | size_t idx; | |
1065 | i = 1; | |
1066 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1067 | if (p[idx]) { | |
1068 | i = 0; | |
1069 | break; | |
0f113f3e | 1070 | } |
0f113f3e | 1071 | } |
751b26b1 TT |
1072 | } else { |
1073 | i = s->hello_retry_request == 0; | |
1074 | } | |
0f113f3e | 1075 | |
f7f2a01d | 1076 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
f63a17d6 MC |
1077 | DOWNGRADE_NONE) <= 0) { |
1078 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1079 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1080 | return 0; |
f63a17d6 | 1081 | } |
b9908bf9 | 1082 | |
b9908bf9 MC |
1083 | /*- |
1084 | * version indicates the negotiated version: for example from | |
1085 | * an SSLv2/v3 compatible client hello). The client_version | |
1086 | * field is the maximum version we permit and it is also | |
1087 | * used in RSA encrypted premaster secrets. Some servers can | |
1088 | * choke if we initially report a higher version then | |
1089 | * renegotiate to a lower one in the premaster secret. This | |
1090 | * didn't happen with TLS 1.0 as most servers supported it | |
1091 | * but it can with TLS 1.1 or later if the server only supports | |
1092 | * 1.0. | |
1093 | * | |
1094 | * Possible scenario with previous logic: | |
1095 | * 1. Client hello indicates TLS 1.2 | |
1096 | * 2. Server hello says TLS 1.0 | |
1097 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1098 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1099 | * 5. Server sends hello request to renegotiate. |
1100 | * 6. Client hello indicates TLS v1.0 as we now | |
1101 | * know that is maximum server supports. | |
1102 | * 7. Server chokes on RSA encrypted premaster secret | |
1103 | * containing version 1.0. | |
1104 | * | |
1105 | * For interoperability it should be OK to always use the | |
1106 | * maximum version we support in client hello and then rely | |
1107 | * on the checking of version to ensure the servers isn't | |
1108 | * being inconsistent: for example initially negotiating with | |
1109 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1110 | * client_version in client hello and not resetting it to | |
1111 | * the negotiated version. | |
cd998837 MC |
1112 | * |
1113 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1114 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1115 | */ |
7acb8b64 | 1116 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1117 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
1118 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1119 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1120 | return 0; |
2c7b4dbc | 1121 | } |
b9908bf9 MC |
1122 | |
1123 | /* Session ID */ | |
f05bcf0f | 1124 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1125 | sess_id_len = 0; |
b9908bf9 | 1126 | else |
ec60ccc1 MC |
1127 | sess_id_len = s->session->session_id_length; |
1128 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1129 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1130 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1131 | sess_id_len)) | |
7cea05dc | 1132 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1133 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1134 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1135 | return 0; |
b9908bf9 | 1136 | } |
0f113f3e | 1137 | |
b9908bf9 MC |
1138 | /* cookie stuff for DTLS */ |
1139 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1140 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1141 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1142 | s->d1->cookie_len)) { |
f63a17d6 MC |
1143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1144 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1145 | return 0; |
0f113f3e | 1146 | } |
b9908bf9 MC |
1147 | } |
1148 | ||
1149 | /* Ciphers supported */ | |
7cea05dc | 1150 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1151 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1152 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1153 | return 0; |
2c7b4dbc | 1154 | } |
635c8f77 | 1155 | |
f63a17d6 MC |
1156 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) { |
1157 | /* SSLfatal() already called */ | |
7cea05dc | 1158 | return 0; |
f63a17d6 | 1159 | } |
7cea05dc | 1160 | if (!WPACKET_close(pkt)) { |
f63a17d6 MC |
1161 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1162 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1163 | return 0; |
b9908bf9 | 1164 | } |
0f113f3e | 1165 | |
b9908bf9 | 1166 | /* COMPRESSION */ |
7cea05dc | 1167 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
f63a17d6 MC |
1168 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1169 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1170 | return 0; |
2c7b4dbc MC |
1171 | } |
1172 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1173 | if (ssl_allow_compression(s) |
1174 | && s->ctx->comp_methods | |
1175 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1176 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1177 | for (i = 0; i < compnum; i++) { | |
1178 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1179 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
f63a17d6 MC |
1180 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1181 | SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, | |
1182 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1183 | return 0; |
2c7b4dbc MC |
1184 | } |
1185 | } | |
b9908bf9 | 1186 | } |
09b6c2ef | 1187 | #endif |
2c7b4dbc | 1188 | /* Add the NULL method */ |
7cea05dc | 1189 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1190 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, |
1191 | ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1192 | return 0; |
2c7b4dbc | 1193 | } |
761772d7 | 1194 | |
b9908bf9 | 1195 | /* TLS extensions */ |
f63a17d6 MC |
1196 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1197 | /* SSLfatal() already called */ | |
7cea05dc | 1198 | return 0; |
b9908bf9 | 1199 | } |
0f113f3e | 1200 | |
b9908bf9 | 1201 | return 1; |
0f113f3e | 1202 | } |
d02b48c6 | 1203 | |
be3583fa | 1204 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 | 1205 | { |
cb150cbc | 1206 | size_t cookie_len; |
8ba708e5 MC |
1207 | PACKET cookiepkt; |
1208 | ||
1209 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1210 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
f63a17d6 MC |
1211 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1212 | SSL_R_LENGTH_MISMATCH); | |
1213 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1214 | } |
1215 | ||
1216 | cookie_len = PACKET_remaining(&cookiepkt); | |
1217 | if (cookie_len > sizeof(s->d1->cookie)) { | |
f63a17d6 MC |
1218 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1219 | SSL_R_LENGTH_TOO_LONG); | |
1220 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1221 | } |
1222 | ||
1223 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
f63a17d6 MC |
1224 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_DTLS_PROCESS_HELLO_VERIFY, |
1225 | SSL_R_LENGTH_MISMATCH); | |
1226 | return MSG_PROCESS_ERROR; | |
8ba708e5 MC |
1227 | } |
1228 | s->d1->cookie_len = cookie_len; | |
1229 | ||
1230 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1231 | } |
1232 | ||
11c67eea | 1233 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1234 | { |
1235 | STACK_OF(SSL_CIPHER) *sk; | |
1236 | const SSL_CIPHER *c; | |
11c67eea MC |
1237 | int i; |
1238 | ||
1239 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1240 | if (c == NULL) { | |
1241 | /* unknown cipher */ | |
f63a17d6 MC |
1242 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1243 | SSL_R_UNKNOWN_CIPHER_RETURNED); | |
11c67eea MC |
1244 | return 0; |
1245 | } | |
1246 | /* | |
1247 | * If it is a disabled cipher we either didn't send it in client hello, | |
1248 | * or it's not allowed for the selected protocol. So we return an error. | |
1249 | */ | |
8af91fd9 | 1250 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
f63a17d6 MC |
1251 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1252 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1253 | return 0; |
1254 | } | |
1255 | ||
1256 | sk = ssl_get_ciphers_by_id(s); | |
1257 | i = sk_SSL_CIPHER_find(sk, c); | |
1258 | if (i < 0) { | |
1259 | /* we did not say we would use this cipher */ | |
f63a17d6 MC |
1260 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1261 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1262 | return 0; |
1263 | } | |
1264 | ||
1265 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1266 | && s->s3->tmp.new_cipher->id != c->id) { | |
1267 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
f63a17d6 MC |
1268 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1269 | SSL_R_WRONG_CIPHER_RETURNED); | |
11c67eea MC |
1270 | return 0; |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * Depending on the session caching (internal/external), the cipher | |
1275 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1276 | * set and use it for comparison. | |
1277 | */ | |
1278 | if (s->session->cipher != NULL) | |
1279 | s->session->cipher_id = s->session->cipher->id; | |
1280 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1281 | if (SSL_IS_TLS13(s)) { |
1282 | /* | |
1283 | * In TLSv1.3 it is valid for the server to select a different | |
1284 | * ciphersuite as long as the hash is the same. | |
1285 | */ | |
1286 | if (ssl_md(c->algorithm2) | |
1287 | != ssl_md(s->session->cipher->algorithm2)) { | |
f63a17d6 MC |
1288 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1289 | SSL_F_SET_CLIENT_CIPHERSUITE, | |
1290 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
a055a881 MC |
1291 | return 0; |
1292 | } | |
1293 | } else { | |
1294 | /* | |
1295 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1296 | * ciphersuite. | |
1297 | */ | |
f63a17d6 MC |
1298 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SET_CLIENT_CIPHERSUITE, |
1299 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
a055a881 MC |
1300 | return 0; |
1301 | } | |
11c67eea MC |
1302 | } |
1303 | s->s3->tmp.new_cipher = c; | |
1304 | ||
1305 | return 1; | |
1306 | } | |
1307 | ||
1308 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1309 | { | |
332eb390 | 1310 | PACKET session_id, extpkt; |
b9908bf9 | 1311 | size_t session_id_len; |
b6981744 | 1312 | const unsigned char *cipherchars; |
11c67eea | 1313 | int al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1314 | unsigned int compression; |
4fa52141 | 1315 | unsigned int sversion; |
3434f40b | 1316 | unsigned int context; |
1fcb4e4d | 1317 | int protverr, discard; |
332eb390 | 1318 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1319 | #ifndef OPENSSL_NO_COMP |
1320 | SSL_COMP *comp; | |
1321 | #endif | |
1322 | ||
4fa52141 | 1323 | if (!PACKET_get_net_2(pkt, &sversion)) { |
f63a17d6 MC |
1324 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1325 | SSL_R_LENGTH_MISMATCH); | |
1326 | goto err; | |
4fa52141 | 1327 | } |
50932c4a | 1328 | |
c3043dcd MC |
1329 | /* load the server random */ |
1330 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
f63a17d6 MC |
1331 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1332 | SSL_R_LENGTH_MISMATCH); | |
1333 | goto err; | |
c3043dcd MC |
1334 | } |
1335 | ||
1336 | /* | |
1337 | * We do this immediately so we know what format the ServerHello is in. | |
1338 | * Must be done after reading the random data so we can check for the | |
1339 | * TLSv1.3 downgrade sentinels | |
1340 | */ | |
1341 | protverr = ssl_choose_client_version(s, sversion, 1, &al); | |
4fa52141 | 1342 | if (protverr != 0) { |
f63a17d6 MC |
1343 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1344 | protverr); | |
1345 | goto err; | |
0f113f3e | 1346 | } |
0f113f3e | 1347 | |
524420d8 MC |
1348 | /* |
1349 | * In TLSv1.3 a ServerHello message signals a key change so the end of the | |
1350 | * message must be on a record boundary. | |
1351 | */ | |
1352 | if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
f63a17d6 MC |
1353 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1354 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1355 | goto err; | |
524420d8 MC |
1356 | } |
1357 | ||
fc5ce51d | 1358 | /* Get the session-id. */ |
71728dd8 MC |
1359 | if (!SSL_IS_TLS13(s)) { |
1360 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
f63a17d6 MC |
1361 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1362 | SSL_R_LENGTH_MISMATCH); | |
1363 | goto err; | |
71728dd8 MC |
1364 | } |
1365 | session_id_len = PACKET_remaining(&session_id); | |
1366 | if (session_id_len > sizeof s->session->session_id | |
1367 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
f63a17d6 MC |
1368 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1369 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1370 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1371 | goto err; | |
71728dd8 MC |
1372 | } |
1373 | } else { | |
625b0d51 | 1374 | PACKET_null_init(&session_id); |
71728dd8 | 1375 | session_id_len = 0; |
0f113f3e | 1376 | } |
e481f9b9 | 1377 | |
73999b62 | 1378 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1379 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1380 | SSL_R_LENGTH_MISMATCH); | |
1381 | goto err; | |
fc5ce51d EK |
1382 | } |
1383 | ||
4ff65f77 MC |
1384 | if (!SSL_IS_TLS13(s)) { |
1385 | if (!PACKET_get_1(pkt, &compression)) { | |
f63a17d6 MC |
1386 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1387 | SSL_R_LENGTH_MISMATCH); | |
1388 | goto err; | |
4ff65f77 MC |
1389 | } |
1390 | } else { | |
1391 | compression = 0; | |
1392 | } | |
1393 | ||
1394 | /* TLS extensions */ | |
1395 | if (PACKET_remaining(pkt) == 0) { | |
1396 | PACKET_null_init(&extpkt); | |
26b9172a MC |
1397 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1398 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1399 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1400 | SSL_R_BAD_LENGTH); | |
1401 | goto err; | |
4ff65f77 MC |
1402 | } |
1403 | ||
fe874d27 MC |
1404 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1405 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
f63a17d6 MC |
1406 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, NULL, 1)) { |
1407 | /* SSLfatal() already called */ | |
1408 | goto err; | |
1409 | } | |
4ff65f77 MC |
1410 | |
1411 | s->hit = 0; | |
1412 | ||
1413 | if (SSL_IS_TLS13(s)) { | |
1414 | /* This will set s->hit if we are resuming */ | |
1415 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1416 | SSL_EXT_TLS1_3_SERVER_HELLO, |
f63a17d6 MC |
1417 | extensions, NULL, 0l)) { |
1418 | /* SSLfatal() already called */ | |
1419 | goto err; | |
1420 | } | |
4ff65f77 | 1421 | } else { |
8c1a5343 | 1422 | /* |
4ff65f77 MC |
1423 | * Check if we can resume the session based on external pre-shared |
1424 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1425 | * Resumption based on server-side state works with session IDs. | |
1426 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1427 | * works by overriding the SessionTicket extension at the application | |
1428 | * layer, and does not send a session ID. (We do not know whether | |
1429 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1430 | * ID alone is not a reliable indicator of session resumption, so we | |
1431 | * first check if we can resume, and later peek at the next handshake | |
1432 | * message to see if the server wants to resume. | |
8c1a5343 | 1433 | */ |
4ff65f77 MC |
1434 | if (s->version >= TLS1_VERSION |
1435 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1436 | const SSL_CIPHER *pref_cipher = NULL; | |
1437 | /* | |
1438 | * s->session->master_key_length is a size_t, but this is an int for | |
1439 | * backwards compat reasons | |
1440 | */ | |
1441 | int master_key_length; | |
1442 | master_key_length = sizeof(s->session->master_key); | |
1443 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1444 | &master_key_length, | |
1445 | NULL, &pref_cipher, | |
1446 | s->ext.session_secret_cb_arg) | |
1447 | && master_key_length > 0) { | |
1448 | s->session->master_key_length = master_key_length; | |
1449 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1450 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1451 | } else { |
f63a17d6 MC |
1452 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1453 | SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1454 | goto err; | |
4ff65f77 | 1455 | } |
0f113f3e | 1456 | } |
4ff65f77 MC |
1457 | |
1458 | if (session_id_len != 0 | |
1459 | && session_id_len == s->session->session_id_length | |
1460 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1461 | session_id_len) == 0) | |
1462 | s->hit = 1; | |
50932c4a MC |
1463 | } |
1464 | ||
4ff65f77 | 1465 | if (s->hit) { |
0f113f3e | 1466 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1467 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1468 | /* actually a client application bug */ |
f63a17d6 MC |
1469 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1470 | SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1471 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1472 | goto err; | |
0f113f3e | 1473 | } |
6e3d0153 | 1474 | } else { |
0f113f3e | 1475 | /* |
6e3d0153 | 1476 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1477 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1478 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1479 | * so the PAC-based session secret is always preserved. It'll be | |
1480 | * overwritten if the server refuses resumption. | |
0f113f3e | 1481 | */ |
4ff65f77 MC |
1482 | if (s->session->session_id_length > 0 |
1483 | || (SSL_IS_TLS13(s) | |
1484 | && s->session->ext.tick_identity | |
1485 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
0e6161bc BK |
1486 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_miss, 1, &discard, |
1487 | s->session_ctx->lock); | |
0f113f3e | 1488 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1489 | /* SSLfatal() already called */ |
1490 | goto err; | |
0f113f3e MC |
1491 | } |
1492 | } | |
50932c4a | 1493 | |
ccae4a15 | 1494 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1495 | s->session->session_id_length = session_id_len; |
1496 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1497 | if (session_id_len > 0) |
1498 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1499 | session_id_len); | |
0f113f3e | 1500 | } |
fc5ce51d | 1501 | |
ccae4a15 FI |
1502 | /* Session version and negotiated protocol version should match */ |
1503 | if (s->version != s->session->ssl_version) { | |
f63a17d6 MC |
1504 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1505 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1506 | goto err; | |
ccae4a15 | 1507 | } |
0f113f3e | 1508 | /* |
3eb2aff4 KR |
1509 | * Now that we know the version, update the check to see if it's an allowed |
1510 | * version. | |
1511 | */ | |
1512 | s->s3->tmp.min_ver = s->version; | |
1513 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1514 | |
11c67eea | 1515 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1516 | /* SSLfatal() already called */ |
1517 | goto err; | |
0f113f3e MC |
1518 | } |
1519 | ||
09b6c2ef | 1520 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1521 | if (compression != 0) { |
f63a17d6 MC |
1522 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1523 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1524 | goto err; | |
0f113f3e MC |
1525 | } |
1526 | /* | |
1527 | * If compression is disabled we'd better not try to resume a session | |
1528 | * using compression. | |
1529 | */ | |
1530 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
1531 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1532 | SSL_R_INCONSISTENT_COMPRESSION); | |
1533 | goto err; | |
0f113f3e | 1534 | } |
09b6c2ef | 1535 | #else |
fc5ce51d | 1536 | if (s->hit && compression != s->session->compress_meth) { |
f63a17d6 | 1537 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e | 1538 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1539 | goto err; |
0f113f3e | 1540 | } |
fc5ce51d | 1541 | if (compression == 0) |
0f113f3e MC |
1542 | comp = NULL; |
1543 | else if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1544 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1545 | SSL_R_COMPRESSION_DISABLED); | |
1546 | goto err; | |
fc5ce51d EK |
1547 | } else { |
1548 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1549 | } | |
0f113f3e | 1550 | |
fc5ce51d | 1551 | if (compression != 0 && comp == NULL) { |
f63a17d6 MC |
1552 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SERVER_HELLO, |
1553 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1554 | goto err; | |
0f113f3e MC |
1555 | } else { |
1556 | s->s3->tmp.new_compression = comp; | |
1557 | } | |
09b6c2ef | 1558 | #endif |
761772d7 | 1559 | |
f63a17d6 MC |
1560 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1561 | /* SSLfatal() already called */ | |
1562 | goto err; | |
1563 | } | |
332eb390 | 1564 | |
8723588e MC |
1565 | #ifndef OPENSSL_NO_SCTP |
1566 | if (SSL_IS_DTLS(s) && s->hit) { | |
1567 | unsigned char sctpauthkey[64]; | |
1568 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1569 | ||
1570 | /* | |
1571 | * Add new shared key for SCTP-Auth, will be ignored if | |
1572 | * no SCTP used. | |
1573 | */ | |
141eb8c6 MC |
1574 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1575 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1576 | |
1577 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1578 | sizeof(sctpauthkey), |
1579 | labelbuffer, | |
f63a17d6 MC |
1580 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
1581 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1582 | ERR_R_INTERNAL_ERROR); | |
1583 | goto err; | |
1584 | } | |
8723588e MC |
1585 | |
1586 | BIO_ctrl(SSL_get_wbio(s), | |
1587 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1588 | sizeof(sctpauthkey), sctpauthkey); | |
1589 | } | |
1590 | #endif | |
1591 | ||
92760c21 MC |
1592 | /* |
1593 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1594 | * we're done with this message | |
1595 | */ | |
1596 | if (SSL_IS_TLS13(s) | |
1597 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1598 | || !s->method->ssl3_enc->change_cipher_state(s, |
1599 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
f63a17d6 MC |
1600 | /* SSLfatal() already called */ |
1601 | goto err; | |
92760c21 MC |
1602 | } |
1603 | ||
1b0286a3 | 1604 | OPENSSL_free(extensions); |
b9908bf9 | 1605 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1606 | err: |
1b0286a3 | 1607 | OPENSSL_free(extensions); |
b9908bf9 | 1608 | return MSG_PROCESS_ERROR; |
0f113f3e | 1609 | } |
d02b48c6 | 1610 | |
3847d426 MC |
1611 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1612 | { | |
1613 | unsigned int sversion; | |
11c67eea | 1614 | const unsigned char *cipherchars; |
3847d426 | 1615 | RAW_EXTENSION *extensions = NULL; |
3847d426 MC |
1616 | PACKET extpkt; |
1617 | ||
1618 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
f63a17d6 MC |
1619 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, |
1620 | SSL_R_LENGTH_MISMATCH); | |
1621 | goto err; | |
3847d426 MC |
1622 | } |
1623 | ||
61278ff3 MC |
1624 | /* TODO(TLS1.3): Remove the TLS1_3_VERSION_DRAFT clause before release */ |
1625 | if (sversion != TLS1_3_VERSION && sversion != TLS1_3_VERSION_DRAFT) { | |
f63a17d6 MC |
1626 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
1627 | SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, | |
1628 | SSL_R_WRONG_SSL_VERSION); | |
1629 | goto err; | |
61278ff3 MC |
1630 | } |
1631 | ||
3847d426 MC |
1632 | s->hello_retry_request = 1; |
1633 | ||
d4504fe5 MC |
1634 | /* |
1635 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1636 | * should not be used. | |
1637 | */ | |
1638 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1639 | s->enc_write_ctx = NULL; | |
1640 | ||
11c67eea | 1641 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f63a17d6 MC |
1642 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, |
1643 | SSL_R_LENGTH_MISMATCH); | |
1644 | goto err; | |
11c67eea MC |
1645 | } |
1646 | ||
1647 | if (!set_client_ciphersuite(s, cipherchars)) { | |
f63a17d6 MC |
1648 | /* SSLfatal() already called */ |
1649 | goto err; | |
11c67eea MC |
1650 | } |
1651 | ||
66d4bf6b MC |
1652 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1653 | /* Must have a non-empty extensions block */ | |
1654 | || PACKET_remaining(&extpkt) == 0 | |
1655 | /* Must be no trailing data after extensions */ | |
1656 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1657 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, |
1658 | SSL_R_BAD_LENGTH); | |
1659 | goto err; | |
3847d426 MC |
1660 | } |
1661 | ||
fe874d27 | 1662 | if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1663 | &extensions, NULL, 1) |
fe874d27 | 1664 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1665 | extensions, NULL, 0, 1)) { |
1666 | /* SSLfatal() already called */ | |
1667 | goto err; | |
1668 | } | |
3847d426 MC |
1669 | |
1670 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1671 | extensions = NULL; |
1672 | ||
f5d270ca BK |
1673 | if (s->ext.tls13_cookie_len == 0 |
1674 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
1675 | && s->s3->tmp.pkey != NULL | |
1676 | #endif | |
1677 | ) { | |
66d4bf6b MC |
1678 | /* |
1679 | * We didn't receive a cookie or a new key_share so the next | |
1680 | * ClientHello will not change | |
1681 | */ | |
f63a17d6 MC |
1682 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1683 | SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, | |
1684 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
1685 | goto err; | |
66d4bf6b | 1686 | } |
3847d426 | 1687 | |
11c67eea MC |
1688 | /* |
1689 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1690 | * a synthetic message_hash in place of ClientHello1. | |
1691 | */ | |
1692 | if (!create_synthetic_message_hash(s)) { | |
f63a17d6 MC |
1693 | /* SSLfatal() already called */ |
1694 | goto err; | |
11c67eea MC |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * Add this message to the Transcript Hash. Normally this is done | |
1699 | * automatically prior to the message processing stage. However due to the | |
1700 | * need to create the synthetic message hash, we defer that step until now | |
1701 | * for HRR messages. | |
1702 | */ | |
1703 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1704 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1705 | /* SSLfatal() already called */ |
1706 | goto err; | |
11c67eea MC |
1707 | } |
1708 | ||
3847d426 | 1709 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1710 | err: |
3847d426 MC |
1711 | OPENSSL_free(extensions); |
1712 | return MSG_PROCESS_ERROR; | |
1713 | } | |
1714 | ||
be3583fa | 1715 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1716 | { |
f63a17d6 | 1717 | int i; |
eb5fd03b | 1718 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
b9908bf9 MC |
1719 | unsigned long cert_list_len, cert_len; |
1720 | X509 *x = NULL; | |
b6981744 | 1721 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1722 | STACK_OF(X509) *sk = NULL; |
1723 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1724 | size_t chainidx, certidx; |
e96e0f8e | 1725 | unsigned int context = 0; |
7f6b466b | 1726 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1727 | |
1728 | if ((sk = sk_X509_new_null()) == NULL) { | |
f63a17d6 MC |
1729 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1730 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1731 | goto err; |
0f113f3e MC |
1732 | } |
1733 | ||
e96e0f8e MC |
1734 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1735 | || context != 0 | |
1736 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1737 | || PACKET_remaining(pkt) != cert_list_len |
1738 | || PACKET_remaining(pkt) == 0) { | |
f63a17d6 MC |
1739 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1740 | SSL_R_LENGTH_MISMATCH); | |
1741 | goto err; | |
0f113f3e | 1742 | } |
d805a57b | 1743 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1744 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1745 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
f63a17d6 MC |
1746 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1747 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1748 | SSL_R_CERT_LENGTH_MISMATCH); | |
1749 | goto err; | |
0f113f3e MC |
1750 | } |
1751 | ||
df758a85 MC |
1752 | certstart = certbytes; |
1753 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e | 1754 | if (x == NULL) { |
f63a17d6 MC |
1755 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, |
1756 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1757 | goto err; | |
0f113f3e | 1758 | } |
df758a85 | 1759 | if (certbytes != (certstart + cert_len)) { |
f63a17d6 MC |
1760 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1761 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1762 | SSL_R_CERT_LENGTH_MISMATCH); | |
1763 | goto err; | |
0f113f3e | 1764 | } |
e96e0f8e MC |
1765 | |
1766 | if (SSL_IS_TLS13(s)) { | |
1767 | RAW_EXTENSION *rawexts = NULL; | |
1768 | PACKET extensions; | |
1769 | ||
1770 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
1771 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1772 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1773 | SSL_R_BAD_LENGTH); | |
1774 | goto err; | |
e96e0f8e | 1775 | } |
fe874d27 MC |
1776 | if (!tls_collect_extensions(s, &extensions, |
1777 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1778 | NULL, chainidx == 0) |
8e1634ec | 1779 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1780 | rawexts, x, chainidx, |
8e1634ec | 1781 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1782 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1783 | /* SSLfatal already called */ |
1784 | goto err; | |
5ee289ea MC |
1785 | } |
1786 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1787 | } |
1788 | ||
0f113f3e | 1789 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
1790 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1791 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1792 | ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1793 | goto err; |
0f113f3e MC |
1794 | } |
1795 | x = NULL; | |
0f113f3e MC |
1796 | } |
1797 | ||
1798 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1799 | /* |
1800 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1801 | * for client side verification of the server certificate to take place. | |
1802 | * However, historically the code has only checked that *any* flag is set | |
1803 | * to cause server verification to take place. Use of the other flags makes | |
1804 | * no sense in client mode. An attempt to clean up the semantics was | |
1805 | * reverted because at least one application *only* set | |
1806 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1807 | * server verification to take place, after the clean up it silently did | |
1808 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1809 | * sent to them because they are void functions. Therefore, we now use the | |
1810 | * (less clean) historic behaviour of performing validation if any flag is | |
1811 | * set. The *documented* interface remains the same. | |
1812 | */ | |
1813 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
f63a17d6 MC |
1814 | SSLfatal(s, ssl_verify_alarm_type(s->verify_result), |
1815 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1816 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1817 | goto err; | |
0f113f3e MC |
1818 | } |
1819 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1820 | if (i > 1) { | |
f63a17d6 MC |
1821 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1822 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); | |
1823 | goto err; | |
0f113f3e MC |
1824 | } |
1825 | ||
c34b0f99 | 1826 | s->session->peer_chain = sk; |
0f113f3e MC |
1827 | /* |
1828 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1829 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1830 | */ |
1831 | x = sk_X509_value(sk, 0); | |
1832 | sk = NULL; | |
0f113f3e | 1833 | |
8382fd3a | 1834 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1835 | |
55a9a16f | 1836 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1837 | x = NULL; |
f63a17d6 MC |
1838 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
1839 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1840 | goto err; | |
0f113f3e MC |
1841 | } |
1842 | ||
7f6b466b | 1843 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e | 1844 | x = NULL; |
f63a17d6 MC |
1845 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1846 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1847 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1848 | goto err; | |
0f113f3e | 1849 | } |
05b8486e DSH |
1850 | /* |
1851 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1852 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1853 | * type. | |
1854 | */ | |
1855 | if (!SSL_IS_TLS13(s)) { | |
7f6b466b | 1856 | if ((clu->amask & s->s3->tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e | 1857 | x = NULL; |
f63a17d6 MC |
1858 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1859 | SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1860 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1861 | goto err; | |
05b8486e | 1862 | } |
0f113f3e | 1863 | } |
7f6b466b | 1864 | s->session->peer_type = certidx; |
55a9a16f MC |
1865 | |
1866 | X509_free(s->session->peer); | |
05f0fb9f | 1867 | X509_up_ref(x); |
55a9a16f | 1868 | s->session->peer = x; |
0f113f3e | 1869 | s->session->verify_result = s->verify_result; |
0f113f3e | 1870 | x = NULL; |
2c5dfdc3 MC |
1871 | |
1872 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1873 | if (SSL_IS_TLS13(s) | |
1874 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1875 | sizeof(s->cert_verify_hash), | |
1876 | &s->cert_verify_hash_len)) { | |
f63a17d6 MC |
1877 | /* SSLfatal() already called */; |
1878 | goto err; | |
2c5dfdc3 MC |
1879 | } |
1880 | ||
b9908bf9 | 1881 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 1882 | |
cc273a93 | 1883 | err: |
0f113f3e MC |
1884 | X509_free(x); |
1885 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1886 | return ret; |
0f113f3e | 1887 | } |
d02b48c6 | 1888 | |
a2c2e000 | 1889 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt) |
02a74590 MC |
1890 | { |
1891 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1892 | PACKET psk_identity_hint; |
02a74590 | 1893 | |
7dc1c647 MC |
1894 | /* PSK ciphersuites are preceded by an identity hint */ |
1895 | ||
1896 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
a2c2e000 MC |
1897 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1898 | SSL_R_LENGTH_MISMATCH); | |
7dc1c647 MC |
1899 | return 0; |
1900 | } | |
1901 | ||
1902 | /* | |
1903 | * Store PSK identity hint for later use, hint is used in | |
1904 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1905 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1906 | * identity. | |
1907 | */ | |
1908 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
1909 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1910 | SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, | |
1911 | SSL_R_DATA_LENGTH_TOO_LONG); | |
7dc1c647 MC |
1912 | return 0; |
1913 | } | |
02a74590 | 1914 | |
7dc1c647 MC |
1915 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1916 | OPENSSL_free(s->session->psk_identity_hint); | |
1917 | s->session->psk_identity_hint = NULL; | |
1918 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1919 | &s->session->psk_identity_hint)) { |
a2c2e000 MC |
1920 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1921 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 MC |
1922 | return 0; |
1923 | } | |
1924 | ||
1925 | return 1; | |
1926 | #else | |
a2c2e000 MC |
1927 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, |
1928 | ERR_R_INTERNAL_ERROR); | |
7dc1c647 | 1929 | return 0; |
02a74590 MC |
1930 | #endif |
1931 | } | |
1932 | ||
a2c2e000 | 1933 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
1934 | { |
1935 | #ifndef OPENSSL_NO_SRP | |
1936 | PACKET prime, generator, salt, server_pub; | |
1937 | ||
1938 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1939 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1940 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1941 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
a2c2e000 MC |
1942 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
1943 | SSL_R_LENGTH_MISMATCH); | |
25c6c10c MC |
1944 | return 0; |
1945 | } | |
1946 | ||
348240c6 | 1947 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1948 | if ((s->srp_ctx.N = |
1949 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1950 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1951 | || (s->srp_ctx.g = |
1952 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1953 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1954 | || (s->srp_ctx.s = |
1955 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1956 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1957 | || (s->srp_ctx.B = |
1958 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1959 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
a2c2e000 MC |
1960 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
1961 | ERR_R_BN_LIB); | |
25c6c10c MC |
1962 | return 0; |
1963 | } | |
1964 | ||
a2c2e000 MC |
1965 | if (!srp_verify_server_param(s)) { |
1966 | /* SSLfatal() already called */ | |
25c6c10c MC |
1967 | return 0; |
1968 | } | |
1969 | ||
1970 | /* We must check if there is a certificate */ | |
a230b26e | 1971 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1972 | *pkey = X509_get0_pubkey(s->session->peer); |
1973 | ||
1974 | return 1; | |
1975 | #else | |
a2c2e000 MC |
1976 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_SRP, |
1977 | ERR_R_INTERNAL_ERROR); | |
25c6c10c MC |
1978 | return 0; |
1979 | #endif | |
1980 | } | |
1981 | ||
a2c2e000 | 1982 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d MC |
1983 | { |
1984 | #ifndef OPENSSL_NO_DH | |
1985 | PACKET prime, generator, pub_key; | |
1986 | EVP_PKEY *peer_tmp = NULL; | |
1987 | ||
1988 | DH *dh = NULL; | |
1989 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1990 | ||
26505153 RL |
1991 | int check_bits = 0; |
1992 | ||
e01a610d MC |
1993 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1994 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1995 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
a2c2e000 MC |
1996 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
1997 | SSL_R_LENGTH_MISMATCH); | |
e01a610d MC |
1998 | return 0; |
1999 | } | |
2000 | ||
2001 | peer_tmp = EVP_PKEY_new(); | |
2002 | dh = DH_new(); | |
2003 | ||
2004 | if (peer_tmp == NULL || dh == NULL) { | |
a2c2e000 MC |
2005 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2006 | ERR_R_MALLOC_FAILURE); | |
e01a610d MC |
2007 | goto err; |
2008 | } | |
2009 | ||
348240c6 MC |
2010 | /* TODO(size_t): Convert these calls */ |
2011 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
2012 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2013 | NULL); | |
2014 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2015 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2016 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
a2c2e000 MC |
2017 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2018 | ERR_R_BN_LIB); | |
e01a610d MC |
2019 | goto err; |
2020 | } | |
2021 | ||
69687aa8 | 2022 | /* test non-zero pubkey */ |
26505153 | 2023 | if (BN_is_zero(bnpub_key)) { |
a2c2e000 MC |
2024 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2025 | SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2026 | goto err; |
2027 | } | |
2028 | ||
2029 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
a2c2e000 MC |
2030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2031 | ERR_R_BN_LIB); | |
e01a610d MC |
2032 | goto err; |
2033 | } | |
2034 | p = g = NULL; | |
2035 | ||
26505153 | 2036 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
a2c2e000 MC |
2037 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_DHE, |
2038 | SSL_R_BAD_DH_VALUE); | |
26505153 RL |
2039 | goto err; |
2040 | } | |
2041 | ||
e01a610d | 2042 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
a2c2e000 MC |
2043 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2044 | ERR_R_BN_LIB); | |
e01a610d MC |
2045 | goto err; |
2046 | } | |
2047 | bnpub_key = NULL; | |
2048 | ||
2049 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
a2c2e000 MC |
2050 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_SKE_DHE, |
2051 | SSL_R_DH_KEY_TOO_SMALL); | |
e01a610d MC |
2052 | goto err; |
2053 | } | |
2054 | ||
2055 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
a2c2e000 MC |
2056 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2057 | ERR_R_EVP_LIB); | |
e01a610d MC |
2058 | goto err; |
2059 | } | |
2060 | ||
2061 | s->s3->peer_tmp = peer_tmp; | |
2062 | ||
2063 | /* | |
2064 | * FIXME: This makes assumptions about which ciphersuites come with | |
2065 | * public keys. We should have a less ad-hoc way of doing this | |
2066 | */ | |
a230b26e | 2067 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2068 | *pkey = X509_get0_pubkey(s->session->peer); |
2069 | /* else anonymous DH, so no certificate or pkey. */ | |
2070 | ||
2071 | return 1; | |
2072 | ||
2073 | err: | |
2074 | BN_free(p); | |
2075 | BN_free(g); | |
2076 | BN_free(bnpub_key); | |
2077 | DH_free(dh); | |
2078 | EVP_PKEY_free(peer_tmp); | |
2079 | ||
2080 | return 0; | |
2081 | #else | |
a2c2e000 MC |
2082 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_DHE, |
2083 | ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2084 | return 0; |
2085 | #endif | |
2086 | } | |
2087 | ||
a2c2e000 | 2088 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 MC |
2089 | { |
2090 | #ifndef OPENSSL_NO_EC | |
2091 | PACKET encoded_pt; | |
6447e818 | 2092 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2093 | |
2094 | /* | |
2095 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2096 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2097 | * ECParameters in this case is just three bytes. |
2098 | */ | |
6447e818 | 2099 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
a2c2e000 MC |
2100 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2101 | SSL_R_LENGTH_TOO_SHORT); | |
ff74aeb1 MC |
2102 | return 0; |
2103 | } | |
2104 | /* | |
6447e818 DSH |
2105 | * Check curve is named curve type and one of our preferences, if not |
2106 | * server has sent an invalid curve. | |
ff74aeb1 | 2107 | */ |
6447e818 | 2108 | if (curve_type != NAMED_CURVE_TYPE || !tls1_check_group_id(s, curve_id)) { |
a2c2e000 MC |
2109 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2110 | SSL_R_WRONG_CURVE); | |
ff74aeb1 MC |
2111 | return 0; |
2112 | } | |
2113 | ||
6447e818 | 2114 | if ((s->s3->peer_tmp = ssl_generate_param_group(curve_id)) == NULL) { |
a2c2e000 MC |
2115 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2116 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
ff74aeb1 MC |
2117 | return 0; |
2118 | } | |
2119 | ||
ff74aeb1 | 2120 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
a2c2e000 MC |
2121 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2122 | SSL_R_LENGTH_MISMATCH); | |
ff74aeb1 MC |
2123 | return 0; |
2124 | } | |
2125 | ||
ec24630a DSH |
2126 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2127 | PACKET_data(&encoded_pt), | |
2128 | PACKET_remaining(&encoded_pt))) { | |
a2c2e000 MC |
2129 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2130 | SSL_R_BAD_ECPOINT); | |
ff74aeb1 MC |
2131 | return 0; |
2132 | } | |
2133 | ||
2134 | /* | |
2135 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2136 | * ECParameters in the server key exchange message. We do support RSA | |
2137 | * and ECDSA. | |
2138 | */ | |
2139 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2140 | *pkey = X509_get0_pubkey(s->session->peer); | |
2141 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2142 | *pkey = X509_get0_pubkey(s->session->peer); | |
2143 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2144 | ||
2145 | return 1; | |
2146 | #else | |
a2c2e000 MC |
2147 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SKE_ECDHE, |
2148 | ERR_R_INTERNAL_ERROR); | |
ff74aeb1 MC |
2149 | return 0; |
2150 | #endif | |
2151 | } | |
2152 | ||
be3583fa | 2153 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2154 | { |
e1e588ac | 2155 | long alg_k; |
b9908bf9 | 2156 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2157 | EVP_MD_CTX *md_ctx = NULL; |
2158 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2159 | PACKET save_param_start, signature; |
b9908bf9 | 2160 | |
b9908bf9 MC |
2161 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2162 | ||
73999b62 | 2163 | save_param_start = *pkt; |
8d92c1f8 | 2164 | |
3260adf1 | 2165 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2166 | EVP_PKEY_free(s->s3->peer_tmp); |
2167 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2168 | #endif |
d02b48c6 | 2169 | |
7689082b | 2170 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2171 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2172 | /* SSLfatal() already called */ | |
7dc1c647 | 2173 | goto err; |
a2c2e000 | 2174 | } |
7689082b DSH |
2175 | } |
2176 | ||
2177 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2178 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2179 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2180 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2181 | /* SSLfatal() already called */ | |
0f113f3e | 2182 | goto err; |
a2c2e000 | 2183 | } |
e01a610d | 2184 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2185 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2186 | /* SSLfatal() already called */ | |
e01a610d | 2187 | goto err; |
a2c2e000 | 2188 | } |
ff74aeb1 | 2189 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2190 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2191 | /* SSLfatal() already called */ | |
ff74aeb1 | 2192 | goto err; |
a2c2e000 | 2193 | } |
0f113f3e | 2194 | } else if (alg_k) { |
a2c2e000 MC |
2195 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2196 | SSL_R_UNEXPECTED_MESSAGE); | |
e1e588ac | 2197 | goto err; |
0f113f3e | 2198 | } |
0f113f3e | 2199 | |
0f113f3e MC |
2200 | /* if it was signed, check the signature */ |
2201 | if (pkey != NULL) { | |
32942870 | 2202 | PACKET params; |
be8dba2c MC |
2203 | int maxsig; |
2204 | const EVP_MD *md = NULL; | |
72ceb6a6 DSH |
2205 | unsigned char *tbs; |
2206 | size_t tbslen; | |
2207 | int rv; | |
e1e588ac | 2208 | |
32942870 EK |
2209 | /* |
2210 | * |pkt| now points to the beginning of the signature, so the difference | |
2211 | * equals the length of the parameters. | |
2212 | */ | |
2213 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2214 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2215 | PACKET_remaining(pkt))) { |
a2c2e000 MC |
2216 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2217 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2218 | goto err; |
32942870 EK |
2219 | } |
2220 | ||
0f113f3e | 2221 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2222 | unsigned int sigalg; |
703bcee0 MC |
2223 | |
2224 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
a2c2e000 MC |
2225 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2226 | SSL_R_LENGTH_TOO_SHORT); | |
e1e588ac | 2227 | goto err; |
0f113f3e | 2228 | } |
f63a17d6 MC |
2229 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2230 | /* SSLfatal() already called */ | |
0f113f3e | 2231 | goto err; |
0f113f3e | 2232 | } |
a2f9200f | 2233 | #ifdef SSL_DEBUG |
0f113f3e MC |
2234 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2235 | #endif | |
f365a3e2 | 2236 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
a2c2e000 MC |
2237 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2238 | ERR_R_INTERNAL_ERROR); | |
f365a3e2 | 2239 | goto err; |
32942870 | 2240 | } |
0f113f3e | 2241 | |
b2021556 | 2242 | if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) { |
a2c2e000 MC |
2243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2244 | ERR_R_INTERNAL_ERROR); | |
b2021556 DSH |
2245 | goto err; |
2246 | } | |
f365a3e2 | 2247 | |
73999b62 MC |
2248 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2249 | || PACKET_remaining(pkt) != 0) { | |
a2c2e000 MC |
2250 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2251 | SSL_R_LENGTH_MISMATCH); | |
e1e588ac | 2252 | goto err; |
0f113f3e | 2253 | } |
be8dba2c MC |
2254 | maxsig = EVP_PKEY_size(pkey); |
2255 | if (maxsig < 0) { | |
a2c2e000 MC |
2256 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2257 | ERR_R_INTERNAL_ERROR); | |
e1e588ac | 2258 | goto err; |
8098fc56 | 2259 | } |
0f113f3e MC |
2260 | |
2261 | /* | |
8098fc56 | 2262 | * Check signature length |
0f113f3e | 2263 | */ |
be8dba2c | 2264 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2265 | /* wrong packet length */ |
a2c2e000 | 2266 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
a230b26e | 2267 | SSL_R_WRONG_SIGNATURE_LENGTH); |
e1e588ac MC |
2268 | goto err; |
2269 | } | |
2270 | ||
2271 | md_ctx = EVP_MD_CTX_new(); | |
2272 | if (md_ctx == NULL) { | |
a2c2e000 MC |
2273 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2274 | ERR_R_MALLOC_FAILURE); | |
e1e588ac | 2275 | goto err; |
0f113f3e | 2276 | } |
e1e588ac | 2277 | |
fe3066ee | 2278 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
a2c2e000 MC |
2279 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2280 | ERR_R_EVP_LIB); | |
fe3066ee MC |
2281 | goto err; |
2282 | } | |
5554facb | 2283 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2284 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2285 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2286 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
a2c2e000 MC |
2287 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2288 | SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
fe3066ee MC |
2289 | goto err; |
2290 | } | |
2291 | } | |
72ceb6a6 DSH |
2292 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2293 | PACKET_remaining(¶ms)); | |
2294 | if (tbslen == 0) { | |
f63a17d6 | 2295 | /* SSLfatal() already called */ |
e1e588ac | 2296 | goto err; |
192e4bbb | 2297 | } |
72ceb6a6 DSH |
2298 | |
2299 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2300 | PACKET_remaining(&signature), tbs, tbslen); | |
2301 | OPENSSL_free(tbs); | |
cfba0675 | 2302 | if (rv <= 0) { |
a2c2e000 MC |
2303 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2304 | SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2305 | goto err; |
0f113f3e | 2306 | } |
e1e588ac | 2307 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2308 | md_ctx = NULL; |
0f113f3e | 2309 | } else { |
7689082b | 2310 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2311 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2312 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2313 | /* Might be wrong key type, check it */ |
e1e588ac | 2314 | if (ssl3_check_cert_and_algorithm(s)) { |
a2c2e000 MC |
2315 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2316 | SSL_R_BAD_DATA); | |
e1e588ac | 2317 | } |
a2c2e000 | 2318 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2319 | goto err; |
2320 | } | |
2321 | /* still data left over */ | |
73999b62 | 2322 | if (PACKET_remaining(pkt) != 0) { |
a2c2e000 MC |
2323 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2324 | SSL_R_EXTRA_DATA_IN_MESSAGE); | |
e1e588ac | 2325 | goto err; |
0f113f3e MC |
2326 | } |
2327 | } | |
e1e588ac | 2328 | |
b9908bf9 | 2329 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2330 | err: |
fe3066ee | 2331 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2332 | return MSG_PROCESS_ERROR; |
0f113f3e | 2333 | } |
d02b48c6 | 2334 | |
be3583fa | 2335 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2336 | { |
32f66107 DSH |
2337 | size_t i; |
2338 | ||
2339 | /* Clear certificate validity flags */ | |
2340 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2341 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2342 | |
03f44b97 | 2343 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2344 | PACKET reqctx, extensions; |
2345 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2346 | |
2347 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2348 | OPENSSL_free(s->s3->tmp.ctype); | |
2349 | s->s3->tmp.ctype = NULL; | |
2350 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2351 | |
03f44b97 DSH |
2352 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2353 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
f63a17d6 MC |
2354 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2355 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2356 | SSL_R_LENGTH_MISMATCH); | |
2357 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2358 | } |
32f66107 DSH |
2359 | |
2360 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
f63a17d6 MC |
2361 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2362 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2363 | SSL_R_BAD_LENGTH); | |
2364 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2365 | } |
2366 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2367 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2368 | &rawexts, NULL, 1) |
fe874d27 | 2369 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2370 | rawexts, NULL, 0, 1)) { |
2371 | /* SSLfatal() already called */ | |
32f66107 | 2372 | OPENSSL_free(rawexts); |
f63a17d6 | 2373 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2374 | } |
2375 | OPENSSL_free(rawexts); | |
2376 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2377 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2378 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2379 | SSL_R_BAD_LENGTH); | |
2380 | return MSG_PROCESS_ERROR; | |
32f66107 | 2381 | } |
03f44b97 DSH |
2382 | } else { |
2383 | PACKET ctypes; | |
75c13e78 | 2384 | |
03f44b97 DSH |
2385 | /* get the certificate types */ |
2386 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
f63a17d6 MC |
2387 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2388 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2389 | SSL_R_LENGTH_MISMATCH); | |
2390 | return MSG_PROCESS_ERROR; | |
03f44b97 DSH |
2391 | } |
2392 | ||
2393 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
f63a17d6 MC |
2394 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2395 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2396 | ERR_R_INTERNAL_ERROR); | |
2397 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2398 | } |
ac112332 | 2399 | |
32f66107 DSH |
2400 | if (SSL_USE_SIGALGS(s)) { |
2401 | PACKET sigalgs; | |
703bcee0 | 2402 | |
32f66107 | 2403 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
f63a17d6 MC |
2404 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2405 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2406 | SSL_R_LENGTH_MISMATCH); | |
2407 | return MSG_PROCESS_ERROR; | |
32f66107 | 2408 | } |
ac112332 | 2409 | |
32f66107 | 2410 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
f63a17d6 MC |
2411 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2412 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2413 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2414 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2415 | } |
2416 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
2417 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2418 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2419 | ERR_R_MALLOC_FAILURE); | |
2420 | return MSG_PROCESS_ERROR; | |
32f66107 | 2421 | } |
0f113f3e | 2422 | } |
0f113f3e | 2423 | |
32f66107 | 2424 | /* get the CA RDNs */ |
f63a17d6 MC |
2425 | if (!parse_ca_names(s, pkt)) { |
2426 | /* SSLfatal() already called */ | |
2427 | return MSG_PROCESS_ERROR; | |
2428 | } | |
03f44b97 DSH |
2429 | } |
2430 | ||
2431 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
2432 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2433 | SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2434 | SSL_R_LENGTH_MISMATCH); | |
2435 | return MSG_PROCESS_ERROR; | |
03f44b97 | 2436 | } |
0f113f3e | 2437 | |
0f113f3e MC |
2438 | /* we should setup a certificate to return.... */ |
2439 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2440 | |
f63a17d6 | 2441 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2442 | } |
2443 | ||
be3583fa | 2444 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2445 | { |
b9908bf9 | 2446 | unsigned int ticklen; |
9ac6244b | 2447 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2448 | unsigned int sess_len; |
de1df7e9 | 2449 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2450 | PACKET nonce; |
b9908bf9 | 2451 | |
73999b62 | 2452 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2453 | || (SSL_IS_TLS13(s) |
2454 | && (!PACKET_get_net_4(pkt, &age_add) | |
2455 | || !PACKET_get_length_prefixed_1(pkt, &nonce) | |
9b6a8254 MC |
2456 | || !PACKET_memdup(&nonce, &s->session->ext.tick_nonce, |
2457 | &s->session->ext.tick_nonce_len))) | |
a230b26e | 2458 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2459 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2460 | || (SSL_IS_TLS13(s) |
2461 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f63a17d6 MC |
2462 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2463 | SSL_R_LENGTH_MISMATCH); | |
2464 | goto err; | |
e711da71 EK |
2465 | } |
2466 | ||
de1df7e9 MC |
2467 | /* |
2468 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2469 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2470 | * be 0 here in that instance | |
2471 | */ | |
e711da71 | 2472 | if (ticklen == 0) |
c9de4a20 | 2473 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2474 | |
150840b9 MC |
2475 | /* |
2476 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2477 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2478 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2479 | * time a NewSessionTicket arrives because those messages arrive | |
2480 | * post-handshake and the session may have already gone into the session | |
2481 | * cache. | |
2482 | */ | |
2483 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee MC |
2484 | int i = s->session_ctx->session_cache_mode; |
2485 | SSL_SESSION *new_sess; | |
2486 | /* | |
2487 | * We reused an existing session, so we need to replace it with a new | |
2488 | * one | |
2489 | */ | |
5d61491c | 2490 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
f63a17d6 MC |
2491 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2492 | SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, | |
2493 | ERR_R_MALLOC_FAILURE); | |
2494 | goto err; | |
5d61491c MC |
2495 | } |
2496 | ||
98ece4ee MC |
2497 | if (i & SSL_SESS_CACHE_CLIENT) { |
2498 | /* | |
e4612d02 | 2499 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2500 | */ |
e4612d02 | 2501 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2502 | } |
2503 | ||
98ece4ee MC |
2504 | SSL_SESSION_free(s->session); |
2505 | s->session = new_sess; | |
2506 | } | |
2507 | ||
fc24f0bf MC |
2508 | /* |
2509 | * Technically the cast to long here is not guaranteed by the C standard - | |
2510 | * but we use it elsewhere, so this should be ok. | |
2511 | */ | |
2512 | s->session->time = (long)time(NULL); | |
2513 | ||
aff8c126 RS |
2514 | OPENSSL_free(s->session->ext.tick); |
2515 | s->session->ext.tick = NULL; | |
2516 | s->session->ext.ticklen = 0; | |
e711da71 | 2517 | |
aff8c126 RS |
2518 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2519 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
2520 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2521 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2522 | goto err; |
2523 | } | |
aff8c126 | 2524 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
2525 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2526 | SSL_R_LENGTH_MISMATCH); | |
2527 | goto err; | |
561e12bb | 2528 | } |
e711da71 | 2529 | |
aff8c126 | 2530 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2531 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2532 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2533 | |
2534 | if (SSL_IS_TLS13(s)) { | |
2535 | PACKET extpkt; | |
2536 | ||
2537 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
26b9172a | 2538 | || PACKET_remaining(pkt) != 0 |
de1df7e9 | 2539 | || !tls_collect_extensions(s, &extpkt, |
fe874d27 | 2540 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
f63a17d6 | 2541 | &exts, NULL, 1) |
fe874d27 MC |
2542 | || !tls_parse_all_extensions(s, |
2543 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2544 | exts, NULL, 0, 1)) { |
2545 | /* SSLfatal() already called */ | |
2546 | goto err; | |
de1df7e9 MC |
2547 | } |
2548 | } | |
2549 | ||
0f113f3e MC |
2550 | /* |
2551 | * There are two ways to detect a resumed ticket session. One is to set | |
2552 | * an appropriate session ID and then the server must return a match in | |
2553 | * ServerHello. This allows the normal client session ID matching to work | |
2554 | * and we know much earlier that the ticket has been accepted. The | |
2555 | * other way is to set zero length session ID when the ticket is | |
2556 | * presented and rely on the handshake to determine session resumption. | |
2557 | * We choose the former approach because this fits in with assumptions | |
2558 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2559 | * SHA256 is disabled) hash of the ticket. | |
2560 | */ | |
ec60ccc1 MC |
2561 | /* |
2562 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2563 | * but s->session->session_id_length is a size_t | |
2564 | */ | |
aff8c126 | 2565 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2566 | s->session->session_id, &sess_len, |
d166ed8c | 2567 | EVP_sha256(), NULL)) { |
f63a17d6 MC |
2568 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, |
2569 | ERR_R_EVP_LIB); | |
d166ed8c DSH |
2570 | goto err; |
2571 | } | |
ec60ccc1 | 2572 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2573 | |
2574 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2575 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2576 | OPENSSL_free(exts); |
de1df7e9 MC |
2577 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2578 | return MSG_PROCESS_FINISHED_READING; | |
2579 | } | |
2580 | ||
b9908bf9 | 2581 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2582 | err: |
33d93417 | 2583 | OPENSSL_free(exts); |
b9908bf9 | 2584 | return MSG_PROCESS_ERROR; |
0f113f3e | 2585 | } |
67c8e7f4 | 2586 | |
f63e4288 MC |
2587 | /* |
2588 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2589 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2590 | */ |
f63a17d6 | 2591 | int tls_process_cert_status_body(SSL *s, PACKET *pkt) |
b9908bf9 | 2592 | { |
8b0e934a | 2593 | size_t resplen; |
b9908bf9 | 2594 | unsigned int type; |
b9908bf9 | 2595 | |
73999b62 | 2596 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2597 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
2598 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2599 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
f63e4288 | 2600 | return 0; |
0f113f3e | 2601 | } |
56a26ce3 MC |
2602 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2603 | || PACKET_remaining(pkt) != resplen) { | |
f63a17d6 MC |
2604 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2605 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2606 | return 0; |
0f113f3e | 2607 | } |
8cbfcc70 RS |
2608 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2609 | if (s->ext.ocsp.resp == NULL) { | |
f63a17d6 MC |
2610 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2611 | ERR_R_MALLOC_FAILURE); | |
f63e4288 | 2612 | return 0; |
0f113f3e | 2613 | } |
8cbfcc70 | 2614 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63a17d6 MC |
2615 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_STATUS_BODY, |
2616 | SSL_R_LENGTH_MISMATCH); | |
f63e4288 | 2617 | return 0; |
ac63710a | 2618 | } |
8cbfcc70 | 2619 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2620 | |
2621 | return 1; | |
2622 | } | |
2faa1b48 | 2623 | |
f63e4288 MC |
2624 | |
2625 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2626 | { | |
f63a17d6 MC |
2627 | if (!tls_process_cert_status_body(s, pkt)) { |
2628 | /* SSLfatal() already called */ | |
f63e4288 MC |
2629 | return MSG_PROCESS_ERROR; |
2630 | } | |
2631 | ||
b9908bf9 | 2632 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2633 | } |
d02b48c6 | 2634 | |
7776a36c MC |
2635 | /* |
2636 | * Perform miscellaneous checks and processing after we have received the | |
2637 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2638 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2639 | * on failure. | |
7776a36c | 2640 | */ |
f63a17d6 | 2641 | int tls_process_initial_server_flight(SSL *s) |
b9908bf9 | 2642 | { |
a455d0f6 MC |
2643 | /* |
2644 | * at this point we check that we have the required stuff from | |
2645 | * the server | |
2646 | */ | |
2647 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2648 | /* SSLfatal() already called */ |
7776a36c | 2649 | return 0; |
a455d0f6 MC |
2650 | } |
2651 | ||
bb1aaab4 | 2652 | /* |
aff8c126 RS |
2653 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2654 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2655 | * message, or NULL and -1 otherwise |
2656 | */ | |
aff8c126 RS |
2657 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2658 | && s->ctx->ext.status_cb != NULL) { | |
2659 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2660 | ||
bb1aaab4 | 2661 | if (ret == 0) { |
f63a17d6 MC |
2662 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
2663 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2664 | SSL_R_INVALID_STATUS_RESPONSE); | |
7776a36c | 2665 | return 0; |
bb1aaab4 MC |
2666 | } |
2667 | if (ret < 0) { | |
f63a17d6 MC |
2668 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2669 | SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2670 | ERR_R_MALLOC_FAILURE); | |
7776a36c | 2671 | return 0; |
bb1aaab4 MC |
2672 | } |
2673 | } | |
ed29e82a RP |
2674 | #ifndef OPENSSL_NO_CT |
2675 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2676 | /* Note we validate the SCTs whether or not we abort on error */ |
2677 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2678 | /* SSLfatal() already called */ |
7776a36c | 2679 | return 0; |
ed29e82a RP |
2680 | } |
2681 | } | |
2682 | #endif | |
2683 | ||
7776a36c MC |
2684 | return 1; |
2685 | } | |
2686 | ||
2687 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2688 | { | |
7776a36c MC |
2689 | if (PACKET_remaining(pkt) > 0) { |
2690 | /* should contain no data */ | |
f63a17d6 MC |
2691 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2692 | SSL_R_LENGTH_MISMATCH); | |
2693 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2694 | } |
2695 | #ifndef OPENSSL_NO_SRP | |
2696 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2697 | if (SRP_Calc_A_param(s) <= 0) { | |
f63a17d6 MC |
2698 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_SERVER_DONE, |
2699 | SSL_R_SRP_A_CALC); | |
2700 | return MSG_PROCESS_ERROR; | |
7776a36c MC |
2701 | } |
2702 | } | |
2703 | #endif | |
2704 | ||
f63a17d6 MC |
2705 | if (!tls_process_initial_server_flight(s)) { |
2706 | /* SSLfatal() already called */ | |
2707 | return MSG_PROCESS_ERROR; | |
2708 | } | |
7776a36c | 2709 | |
bd79bcb4 | 2710 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2711 | } |
176f31dd | 2712 | |
a2c2e000 | 2713 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt) |
0f113f3e | 2714 | { |
7689082b | 2715 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2716 | int ret = 0; |
2717 | /* | |
2718 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2719 | * \0-terminated identity. The last byte is for us for simulating | |
2720 | * strnlen. | |
2721 | */ | |
2722 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2723 | size_t identitylen = 0; | |
2724 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2725 | unsigned char *tmppsk = NULL; | |
2726 | char *tmpidentity = NULL; | |
2727 | size_t psklen = 0; | |
2728 | ||
2729 | if (s->psk_client_callback == NULL) { | |
a2c2e000 MC |
2730 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2731 | SSL_R_PSK_NO_CLIENT_CB); | |
13c0ec4a MC |
2732 | goto err; |
2733 | } | |
d02b48c6 | 2734 | |
13c0ec4a | 2735 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2736 | |
13c0ec4a MC |
2737 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2738 | identity, sizeof(identity) - 1, | |
2739 | psk, sizeof(psk)); | |
7689082b | 2740 | |
13c0ec4a | 2741 | if (psklen > PSK_MAX_PSK_LEN) { |
a2c2e000 MC |
2742 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2743 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2744 | goto err; |
2745 | } else if (psklen == 0) { | |
a2c2e000 MC |
2746 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2747 | SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, | |
2748 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
13c0ec4a MC |
2749 | goto err; |
2750 | } | |
7689082b | 2751 | |
13c0ec4a MC |
2752 | identitylen = strlen(identity); |
2753 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
a2c2e000 MC |
2754 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2755 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2756 | goto err; |
2757 | } | |
7689082b | 2758 | |
13c0ec4a MC |
2759 | tmppsk = OPENSSL_memdup(psk, psklen); |
2760 | tmpidentity = OPENSSL_strdup(identity); | |
2761 | if (tmppsk == NULL || tmpidentity == NULL) { | |
a2c2e000 MC |
2762 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2763 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2764 | goto err; |
2765 | } | |
7689082b | 2766 | |
13c0ec4a MC |
2767 | OPENSSL_free(s->s3->tmp.psk); |
2768 | s->s3->tmp.psk = tmppsk; | |
2769 | s->s3->tmp.psklen = psklen; | |
2770 | tmppsk = NULL; | |
2771 | OPENSSL_free(s->session->psk_identity); | |
2772 | s->session->psk_identity = tmpidentity; | |
2773 | tmpidentity = NULL; | |
f1ec23c0 | 2774 | |
b2b3024e | 2775 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
a2c2e000 MC |
2776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2777 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2778 | goto err; |
2779 | } | |
7689082b | 2780 | |
13c0ec4a | 2781 | ret = 1; |
0bce0b02 | 2782 | |
13c0ec4a MC |
2783 | err: |
2784 | OPENSSL_cleanse(psk, psklen); | |
2785 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2786 | OPENSSL_clear_free(tmppsk, psklen); | |
2787 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2788 | |
13c0ec4a MC |
2789 | return ret; |
2790 | #else | |
a2c2e000 MC |
2791 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
2792 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2793 | return 0; |
b9908bf9 | 2794 | #endif |
13c0ec4a | 2795 | } |
b9908bf9 | 2796 | |
a2c2e000 | 2797 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt) |
13c0ec4a | 2798 | { |
bc36ee62 | 2799 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2800 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2801 | EVP_PKEY *pkey = NULL; |
2802 | EVP_PKEY_CTX *pctx = NULL; | |
2803 | size_t enclen; | |
2804 | unsigned char *pms = NULL; | |
2805 | size_t pmslen = 0; | |
b9908bf9 | 2806 | |
13c0ec4a MC |
2807 | if (s->session->peer == NULL) { |
2808 | /* | |
2809 | * We should always have a server certificate with SSL_kRSA. | |
2810 | */ | |
a2c2e000 MC |
2811 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2812 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2813 | return 0; |
2814 | } | |
0f113f3e | 2815 | |
13c0ec4a MC |
2816 | pkey = X509_get0_pubkey(s->session->peer); |
2817 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
a2c2e000 MC |
2818 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2819 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a MC |
2820 | return 0; |
2821 | } | |
0f113f3e | 2822 | |
13c0ec4a MC |
2823 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2824 | pms = OPENSSL_malloc(pmslen); | |
2825 | if (pms == NULL) { | |
a2c2e000 MC |
2826 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2827 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2828 | return 0; |
2829 | } | |
0bce0b02 | 2830 | |
13c0ec4a MC |
2831 | pms[0] = s->client_version >> 8; |
2832 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2833 | /* TODO(size_t): Convert this function */ |
ae3947de | 2834 | if (ssl_randbytes(s, pms + 2, (int)(pmslen - 2)) <= 0) { |
a2c2e000 MC |
2835 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2836 | ERR_R_MALLOC_FAILURE); | |
13c0ec4a MC |
2837 | goto err; |
2838 | } | |
0f113f3e | 2839 | |
13c0ec4a | 2840 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2841 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
a2c2e000 MC |
2842 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2843 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2844 | goto err; |
2845 | } | |
13c0ec4a MC |
2846 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2847 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2848 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2849 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2850 | ERR_R_EVP_LIB); | |
13c0ec4a MC |
2851 | goto err; |
2852 | } | |
f1ec23c0 MC |
2853 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2854 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
2855 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2856 | SSL_R_BAD_RSA_ENCRYPT); | |
13c0ec4a MC |
2857 | goto err; |
2858 | } | |
13c0ec4a MC |
2859 | EVP_PKEY_CTX_free(pctx); |
2860 | pctx = NULL; | |
0f113f3e | 2861 | |
13c0ec4a | 2862 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2863 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
a2c2e000 MC |
2864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2865 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2866 | goto err; |
b9908bf9 | 2867 | } |
13c0ec4a | 2868 | |
2faa1b48 | 2869 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
2870 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
2871 | /* SSLfatal() already called */ | |
2faa1b48 | 2872 | goto err; |
a2c2e000 | 2873 | } |
2faa1b48 | 2874 | |
26fb4b03 RS |
2875 | s->s3->tmp.pms = pms; |
2876 | s->s3->tmp.pmslen = pmslen; | |
2877 | ||
13c0ec4a MC |
2878 | return 1; |
2879 | err: | |
2880 | OPENSSL_clear_free(pms, pmslen); | |
2881 | EVP_PKEY_CTX_free(pctx); | |
2882 | ||
2883 | return 0; | |
2884 | #else | |
a2c2e000 MC |
2885 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_RSA, |
2886 | ERR_R_INTERNAL_ERROR); | |
13c0ec4a | 2887 | return 0; |
f9b3bff6 | 2888 | #endif |
13c0ec4a MC |
2889 | } |
2890 | ||
a2c2e000 | 2891 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt) |
a8c1c704 MC |
2892 | { |
2893 | #ifndef OPENSSL_NO_DH | |
2894 | DH *dh_clnt = NULL; | |
2895 | const BIGNUM *pub_key; | |
2896 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2897 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2898 | |
2899 | skey = s->s3->peer_tmp; | |
a2c2e000 MC |
2900 | if (skey == NULL) { |
2901 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2902 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2903 | goto err; |
a2c2e000 | 2904 | } |
f1ec23c0 | 2905 | |
0a699a07 | 2906 | ckey = ssl_generate_pkey(skey); |
a2c2e000 MC |
2907 | if (ckey == NULL) { |
2908 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2909 | ERR_R_INTERNAL_ERROR); | |
b599ce3b | 2910 | goto err; |
a2c2e000 | 2911 | } |
b599ce3b | 2912 | |
a8c1c704 MC |
2913 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2914 | ||
a2c2e000 MC |
2915 | if (dh_clnt == NULL) { |
2916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2917 | ERR_R_INTERNAL_ERROR); | |
2918 | goto err; | |
2919 | } | |
2920 | ||
2921 | if (ssl_derive(s, ckey, skey, 0) == 0) { | |
2922 | /* SSLfatal() already called */ | |
f1ec23c0 | 2923 | goto err; |
a2c2e000 | 2924 | } |
a8c1c704 MC |
2925 | |
2926 | /* send off the data */ | |
2927 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
a2c2e000 MC |
2928 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), |
2929 | &keybytes)) { | |
2930 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, | |
2931 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 2932 | goto err; |
a2c2e000 | 2933 | } |
f1ec23c0 MC |
2934 | |
2935 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2936 | EVP_PKEY_free(ckey); |
2937 | ||
2938 | return 1; | |
f1ec23c0 MC |
2939 | err: |
2940 | EVP_PKEY_free(ckey); | |
2941 | #endif | |
a2c2e000 MC |
2942 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_DHE, |
2943 | ERR_R_INTERNAL_ERROR); | |
a8c1c704 | 2944 | return 0; |
a8c1c704 MC |
2945 | } |
2946 | ||
a2c2e000 | 2947 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt) |
67ad5aab MC |
2948 | { |
2949 | #ifndef OPENSSL_NO_EC | |
2950 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2951 | size_t encoded_pt_len = 0; |
67ad5aab | 2952 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2953 | int ret = 0; |
67ad5aab MC |
2954 | |
2955 | skey = s->s3->peer_tmp; | |
ec24630a | 2956 | if (skey == NULL) { |
a2c2e000 MC |
2957 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
2958 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
2959 | return 0; |
2960 | } | |
2961 | ||
0a699a07 | 2962 | ckey = ssl_generate_pkey(skey); |
b599ce3b | 2963 | if (ckey == NULL) { |
a2c2e000 MC |
2964 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
2965 | ERR_R_MALLOC_FAILURE); | |
b599ce3b MC |
2966 | goto err; |
2967 | } | |
67ad5aab | 2968 | |
0f1e51ea | 2969 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 2970 | /* SSLfatal() already called */ |
67ad5aab MC |
2971 | goto err; |
2972 | } | |
2973 | ||
2974 | /* Generate encoding of client key */ | |
ec24630a | 2975 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2976 | |
2977 | if (encoded_pt_len == 0) { | |
a2c2e000 MC |
2978 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
2979 | ERR_R_EC_LIB); | |
67ad5aab MC |
2980 | goto err; |
2981 | } | |
2982 | ||
b2b3024e | 2983 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
a2c2e000 MC |
2984 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
2985 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 MC |
2986 | goto err; |
2987 | } | |
67ad5aab | 2988 | |
f1ec23c0 | 2989 | ret = 1; |
67ad5aab | 2990 | err: |
f1ec23c0 | 2991 | OPENSSL_free(encodedPoint); |
67ad5aab | 2992 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2993 | return ret; |
67ad5aab | 2994 | #else |
a2c2e000 MC |
2995 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_ECDHE, |
2996 | ERR_R_INTERNAL_ERROR); | |
67ad5aab MC |
2997 | return 0; |
2998 | #endif | |
2999 | } | |
3000 | ||
a2c2e000 | 3001 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt) |
e00e0b3d MC |
3002 | { |
3003 | #ifndef OPENSSL_NO_GOST | |
3004 | /* GOST key exchange message creation */ | |
3005 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3006 | X509 *peer_cert; | |
3007 | size_t msglen; | |
3008 | unsigned int md_len; | |
3009 | unsigned char shared_ukm[32], tmp[256]; | |
3010 | EVP_MD_CTX *ukm_hash = NULL; | |
3011 | int dgst_nid = NID_id_GostR3411_94; | |
3012 | unsigned char *pms = NULL; | |
3013 | size_t pmslen = 0; | |
3014 | ||
3015 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
3016 | dgst_nid = NID_id_GostR3411_2012_256; | |
3017 | ||
3018 | /* | |
1ee4b98e | 3019 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3020 | */ |
3021 | peer_cert = s->session->peer; | |
3022 | if (!peer_cert) { | |
a2c2e000 | 3023 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
3024 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
3025 | return 0; | |
3026 | } | |
3027 | ||
3028 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
3029 | if (pkey_ctx == NULL) { | |
a2c2e000 MC |
3030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3031 | ERR_R_MALLOC_FAILURE); | |
e00e0b3d MC |
3032 | return 0; |
3033 | } | |
3034 | /* | |
3035 | * If we have send a certificate, and certificate key | |
3036 | * parameters match those of server certificate, use | |
3037 | * certificate key for key exchange | |
3038 | */ | |
3039 | ||
3040 | /* Otherwise, generate ephemeral key pair */ | |
3041 | pmslen = 32; | |
3042 | pms = OPENSSL_malloc(pmslen); | |
3043 | if (pms == NULL) { | |
a2c2e000 MC |
3044 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3045 | ERR_R_MALLOC_FAILURE); | |
2f3930bc | 3046 | goto err; |
e00e0b3d MC |
3047 | } |
3048 | ||
3049 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3050 | /* Generate session key |
3051 | * TODO(size_t): Convert this function | |
3052 | */ | |
ae3947de | 3053 | || ssl_randbytes(s, pms, (int)pmslen) <= 0) { |
a2c2e000 MC |
3054 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3055 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3056 | goto err; |
3057 | }; | |
e00e0b3d MC |
3058 | /* |
3059 | * Compute shared IV and store it in algorithm-specific context | |
3060 | * data | |
3061 | */ | |
3062 | ukm_hash = EVP_MD_CTX_new(); | |
3063 | if (ukm_hash == NULL | |
a230b26e EK |
3064 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3065 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3066 | SSL3_RANDOM_SIZE) <= 0 | |
3067 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3068 | SSL3_RANDOM_SIZE) <= 0 | |
3069 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
a2c2e000 MC |
3070 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3071 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3072 | goto err; |
3073 | } | |
3074 | EVP_MD_CTX_free(ukm_hash); | |
3075 | ukm_hash = NULL; | |
3076 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3077 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
a2c2e000 MC |
3078 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3079 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3080 | goto err; |
3081 | } | |
3082 | /* Make GOST keytransport blob message */ | |
3083 | /* | |
3084 | * Encapsulate it into sequence | |
3085 | */ | |
e00e0b3d MC |
3086 | msglen = 255; |
3087 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
a2c2e000 MC |
3088 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3089 | SSL_R_LIBRARY_BUG); | |
e00e0b3d MC |
3090 | goto err; |
3091 | } | |
f1ec23c0 | 3092 | |
08029dfa MC |
3093 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3094 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3095 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
a2c2e000 MC |
3096 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3097 | ERR_R_INTERNAL_ERROR); | |
f1ec23c0 | 3098 | goto err; |
e00e0b3d | 3099 | } |
f1ec23c0 | 3100 | |
e00e0b3d MC |
3101 | EVP_PKEY_CTX_free(pkey_ctx); |
3102 | s->s3->tmp.pms = pms; | |
3103 | s->s3->tmp.pmslen = pmslen; | |
3104 | ||
3105 | return 1; | |
3106 | err: | |
3107 | EVP_PKEY_CTX_free(pkey_ctx); | |
3108 | OPENSSL_clear_free(pms, pmslen); | |
3109 | EVP_MD_CTX_free(ukm_hash); | |
3110 | return 0; | |
3111 | #else | |
a2c2e000 MC |
3112 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_GOST, |
3113 | ERR_R_INTERNAL_ERROR); | |
e00e0b3d MC |
3114 | return 0; |
3115 | #endif | |
3116 | } | |
3117 | ||
a2c2e000 | 3118 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt) |
840a2bf8 | 3119 | { |
8b9546c7 | 3120 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3121 | unsigned char *abytes = NULL; |
3122 | ||
3123 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3124 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3125 | &abytes)) { | |
a2c2e000 MC |
3126 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3127 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3128 | return 0; |
3129 | } | |
f1ec23c0 MC |
3130 | BN_bn2bin(s->srp_ctx.A, abytes); |
3131 | ||
840a2bf8 MC |
3132 | OPENSSL_free(s->session->srp_username); |
3133 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3134 | if (s->session->srp_username == NULL) { | |
a2c2e000 MC |
3135 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3136 | ERR_R_MALLOC_FAILURE); | |
840a2bf8 MC |
3137 | return 0; |
3138 | } | |
3139 | ||
3140 | return 1; | |
3141 | #else | |
a2c2e000 MC |
3142 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CKE_SRP, |
3143 | ERR_R_INTERNAL_ERROR); | |
840a2bf8 MC |
3144 | return 0; |
3145 | #endif | |
3146 | } | |
3147 | ||
7cea05dc | 3148 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3149 | { |
13c0ec4a | 3150 | unsigned long alg_k; |
13c0ec4a | 3151 | |
f1ec23c0 | 3152 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3153 | |
a2c2e000 MC |
3154 | /* |
3155 | * All of the construct functions below call SSLfatal() if necessary so | |
3156 | * no need to do so here. | |
3157 | */ | |
13c0ec4a | 3158 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3159 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3160 | goto err; |
3161 | ||
f1ec23c0 | 3162 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3163 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3164 | goto err; |
a8c1c704 | 3165 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3166 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3167 | goto err; |
67ad5aab | 3168 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3169 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3170 | goto err; |
e00e0b3d | 3171 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3172 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3173 | goto err; |
840a2bf8 | 3174 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3175 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3176 | goto err; |
4a424545 | 3177 | } else if (!(alg_k & SSL_kPSK)) { |
a2c2e000 MC |
3178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3179 | SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3180 | goto err; |
3181 | } | |
3182 | ||
b9908bf9 | 3183 | return 1; |
0f113f3e | 3184 | err: |
0bce0b02 | 3185 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3186 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3187 | #ifndef OPENSSL_NO_PSK |
3188 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3189 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3190 | #endif |
b9908bf9 MC |
3191 | return 0; |
3192 | } | |
3193 | ||
3194 | int tls_client_key_exchange_post_work(SSL *s) | |
3195 | { | |
3196 | unsigned char *pms = NULL; | |
3197 | size_t pmslen = 0; | |
3198 | ||
6f137370 MC |
3199 | pms = s->s3->tmp.pms; |
3200 | pmslen = s->s3->tmp.pmslen; | |
3201 | ||
b9908bf9 MC |
3202 | #ifndef OPENSSL_NO_SRP |
3203 | /* Check for SRP */ | |
3204 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3205 | if (!srp_generate_client_master_secret(s)) { | |
a2c2e000 | 3206 | /* SSLfatal() already called */ |
b9908bf9 MC |
3207 | goto err; |
3208 | } | |
3209 | return 1; | |
3210 | } | |
3211 | #endif | |
b9908bf9 MC |
3212 | |
3213 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
a2c2e000 MC |
3214 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3215 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
b9908bf9 MC |
3216 | goto err; |
3217 | } | |
3218 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3219 | /* SSLfatal() already called */ |
6f137370 MC |
3220 | /* ssl_generate_master_secret frees the pms even on error */ |
3221 | pms = NULL; | |
3222 | pmslen = 0; | |
b9908bf9 MC |
3223 | goto err; |
3224 | } | |
6f137370 MC |
3225 | pms = NULL; |
3226 | pmslen = 0; | |
473483d4 MC |
3227 | |
3228 | #ifndef OPENSSL_NO_SCTP | |
3229 | if (SSL_IS_DTLS(s)) { | |
3230 | unsigned char sctpauthkey[64]; | |
3231 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3232 | ||
3233 | /* | |
3234 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3235 | * used. | |
3236 | */ | |
141eb8c6 MC |
3237 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3238 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3239 | |
3240 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e | 3241 | sizeof(sctpauthkey), labelbuffer, |
a2c2e000 MC |
3242 | sizeof(labelbuffer), NULL, 0, 0) <= 0) { |
3243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3244 | SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
473483d4 | 3245 | goto err; |
a2c2e000 | 3246 | } |
473483d4 MC |
3247 | |
3248 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3249 | sizeof(sctpauthkey), sctpauthkey); | |
3250 | } | |
3251 | #endif | |
3252 | ||
b9908bf9 MC |
3253 | return 1; |
3254 | err: | |
3255 | OPENSSL_clear_free(pms, pmslen); | |
3256 | s->s3->tmp.pms = NULL; | |
3257 | return 0; | |
0f113f3e | 3258 | } |
d02b48c6 | 3259 | |
0f113f3e MC |
3260 | /* |
3261 | * Check a certificate can be used for client authentication. Currently check | |
3262 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3263 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3264 | */ |
3265 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3266 | { |
0f113f3e | 3267 | /* If no suitable signature algorithm can't use certificate */ |
f63a17d6 | 3268 | if (!tls_choose_sigalg(s, 0) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3269 | return 0; |
3270 | /* | |
3271 | * If strict mode check suitability of chain before using it. This also | |
3272 | * adjusts suite B digest if necessary. | |
3273 | */ | |
3274 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3275 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3276 | return 0; | |
0f113f3e MC |
3277 | return 1; |
3278 | } | |
0d609395 | 3279 | |
be3583fa | 3280 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3281 | { |
3282 | X509 *x509 = NULL; | |
3283 | EVP_PKEY *pkey = NULL; | |
3284 | int i; | |
3285 | ||
b9908bf9 | 3286 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3287 | /* Let cert callback update client certificates if required */ |
3288 | if (s->cert->cert_cb) { | |
3289 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3290 | if (i < 0) { | |
3291 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3292 | return WORK_MORE_A; |
0f113f3e MC |
3293 | } |
3294 | if (i == 0) { | |
f63a17d6 MC |
3295 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3296 | SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, | |
3297 | SSL_R_CALLBACK_FAILED); | |
eb5fd03b | 3298 | return WORK_ERROR; |
0f113f3e MC |
3299 | } |
3300 | s->rwstate = SSL_NOTHING; | |
3301 | } | |
3302 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3303 | return WORK_FINISHED_CONTINUE; |
3304 | ||
3305 | /* Fall through to WORK_MORE_B */ | |
3306 | wst = WORK_MORE_B; | |
0f113f3e MC |
3307 | } |
3308 | ||
3309 | /* We need to get a client cert */ | |
b9908bf9 | 3310 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3311 | /* |
3312 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3313 | * return(-1); We then get retied later | |
3314 | */ | |
0f113f3e MC |
3315 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3316 | if (i < 0) { | |
3317 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3318 | return WORK_MORE_B; |
0f113f3e MC |
3319 | } |
3320 | s->rwstate = SSL_NOTHING; | |
3321 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3322 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3323 | i = 0; | |
3324 | } else if (i == 1) { | |
3325 | i = 0; | |
b9908bf9 | 3326 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3327 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3328 | } | |
3329 | ||
222561fe | 3330 | X509_free(x509); |
25aaa98a | 3331 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3332 | if (i && !ssl3_check_client_certificate(s)) |
3333 | i = 0; | |
3334 | if (i == 0) { | |
3335 | if (s->version == SSL3_VERSION) { | |
3336 | s->s3->tmp.cert_req = 0; | |
3337 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3338 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3339 | } else { |
3340 | s->s3->tmp.cert_req = 2; | |
124037fd | 3341 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3342 | /* SSLfatal() already called */ |
eb5fd03b | 3343 | return WORK_ERROR; |
dab18ab5 | 3344 | } |
0f113f3e MC |
3345 | } |
3346 | } | |
3347 | ||
b9908bf9 | 3348 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3349 | } |
3350 | ||
b9908bf9 | 3351 | /* Shouldn't ever get here */ |
a2c2e000 MC |
3352 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
3353 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
3354 | return WORK_ERROR; |
3355 | } | |
3356 | ||
7cea05dc | 3357 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3358 | { |
e96e0f8e MC |
3359 | /* |
3360 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3361 | * later | |
3362 | */ | |
f63a17d6 MC |
3363 | if (SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) { |
3364 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3365 | SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3366 | return 0; | |
3367 | } | |
3368 | if (!ssl3_output_cert_chain(s, pkt, | |
3369 | (s->s3->tmp.cert_req == 2) ? NULL | |
3370 | : s->cert->key)) { | |
3371 | /* SSLfatal() already called */ | |
3372 | return 0; | |
f7e393be MC |
3373 | } |
3374 | ||
3375 | if (SSL_IS_TLS13(s) | |
3376 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3377 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3378 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
c31ad0bb | 3379 | /* |
a2c2e000 | 3380 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3381 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3382 | */ |
f63a17d6 MC |
3383 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, |
3384 | SSL_R_CANNOT_CHANGE_CIPHER); | |
c31ad0bb | 3385 | return 0; |
0f113f3e | 3386 | } |
b9908bf9 MC |
3387 | |
3388 | return 1; | |
0f113f3e MC |
3389 | } |
3390 | ||
36d16f8e | 3391 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3392 | { |
dd24857b DSH |
3393 | const SSL_CERT_LOOKUP *clu; |
3394 | size_t idx; | |
0f113f3e | 3395 | long alg_k, alg_a; |
d02b48c6 | 3396 | |
0f113f3e MC |
3397 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3398 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3399 | |
0f113f3e | 3400 | /* we don't have a certificate */ |
dd24857b DSH |
3401 | if (!(alg_a & SSL_aCERT)) |
3402 | return 1; | |
d02b48c6 | 3403 | |
0f113f3e | 3404 | /* This is the passed certificate */ |
dd24857b | 3405 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3406 | |
dd24857b DSH |
3407 | /* Check certificate is recognised and suitable for cipher */ |
3408 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
f63a17d6 MC |
3409 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3410 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3411 | SSL_R_MISSING_SIGNING_CERT); | |
3412 | return 0; | |
0f113f3e | 3413 | } |
0f113f3e | 3414 | |
dd24857b DSH |
3415 | #ifndef OPENSSL_NO_EC |
3416 | if (clu->amask & SSL_aECDSA) { | |
3417 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3418 | return 1; | |
f63a17d6 MC |
3419 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3420 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3421 | return 0; | |
0f113f3e | 3422 | } |
d02b48c6 | 3423 | #endif |
bc36ee62 | 3424 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3425 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 MC |
3426 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3427 | SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3428 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3429 | return 0; | |
0f113f3e | 3430 | } |
79df9d62 | 3431 | #endif |
bc36ee62 | 3432 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3433 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
f63a17d6 MC |
3434 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3435 | ERR_R_INTERNAL_ERROR); | |
3436 | return 0; | |
0f113f3e | 3437 | } |
d02b48c6 RE |
3438 | #endif |
3439 | ||
dd24857b | 3440 | return 1; |
0f113f3e MC |
3441 | } |
3442 | ||
e481f9b9 | 3443 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3444 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3445 | { |
15e6be6c MC |
3446 | size_t len, padding_len; |
3447 | unsigned char *padding = NULL; | |
15e6be6c | 3448 | |
aff8c126 | 3449 | len = s->ext.npn_len; |
b9908bf9 | 3450 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3451 | |
aff8c126 | 3452 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3453 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
a2c2e000 MC |
3454 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_NEXT_PROTO, |
3455 | ERR_R_INTERNAL_ERROR); | |
3456 | return 0; | |
15e6be6c MC |
3457 | } |
3458 | ||
3459 | memset(padding, 0, padding_len); | |
3460 | ||
b9908bf9 MC |
3461 | return 1; |
3462 | } | |
6434abbf | 3463 | #endif |
368888bc | 3464 | |
c7f47786 MC |
3465 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3466 | { | |
3467 | if (PACKET_remaining(pkt) > 0) { | |
3468 | /* should contain no data */ | |
f63a17d6 MC |
3469 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_HELLO_REQ, |
3470 | SSL_R_LENGTH_MISMATCH); | |
c7f47786 MC |
3471 | return MSG_PROCESS_ERROR; |
3472 | } | |
3473 | ||
db0f35dd TS |
3474 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3475 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3476 | return MSG_PROCESS_FINISHED_READING; | |
3477 | } | |
3478 | ||
c7f47786 | 3479 | /* |
1f04f23e MC |
3480 | * This is a historical discrepancy (not in the RFC) maintained for |
3481 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3482 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3483 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3484 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3485 | */ |
3486 | if (SSL_IS_DTLS(s)) | |
3487 | SSL_renegotiate(s); | |
3488 | else | |
3489 | SSL_renegotiate_abbreviated(s); | |
3490 | ||
3491 | return MSG_PROCESS_FINISHED_READING; | |
3492 | } | |
3493 | ||
e46f2334 MC |
3494 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3495 | { | |
e46f2334 | 3496 | PACKET extensions; |
3434f40b | 3497 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3498 | |
26b9172a MC |
3499 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3500 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3501 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, |
3502 | SSL_R_LENGTH_MISMATCH); | |
e46f2334 MC |
3503 | goto err; |
3504 | } | |
3505 | ||
fe874d27 MC |
3506 | if (!tls_collect_extensions(s, &extensions, |
3507 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3508 | NULL, 1) |
fe874d27 | 3509 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3510 | rawexts, NULL, 0, 1)) { |
3511 | /* SSLfatal() already called */ | |
3434f40b | 3512 | goto err; |
f63a17d6 | 3513 | } |
3434f40b | 3514 | |
1b0286a3 | 3515 | OPENSSL_free(rawexts); |
e46f2334 MC |
3516 | return MSG_PROCESS_CONTINUE_READING; |
3517 | ||
3518 | err: | |
1b0286a3 | 3519 | OPENSSL_free(rawexts); |
e46f2334 MC |
3520 | return MSG_PROCESS_ERROR; |
3521 | } | |
3522 | ||
368888bc | 3523 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3524 | { |
3525 | int i = 0; | |
368888bc | 3526 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3527 | if (s->ctx->client_cert_engine) { |
3528 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3529 | SSL_get_client_CA_list(s), | |
3530 | px509, ppkey, NULL, NULL, NULL); | |
3531 | if (i != 0) | |
3532 | return i; | |
3533 | } | |
3534 | #endif | |
3535 | if (s->ctx->client_cert_cb) | |
3536 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3537 | return i; | |
3538 | } | |
d45ba43d | 3539 | |
ae2f7b37 | 3540 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3541 | { |
2c7b4dbc | 3542 | int i; |
aafec89c | 3543 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d MC |
3544 | int empty_reneg_info_scsv = !s->renegotiate; |
3545 | /* Set disabled masks for this session */ | |
3546 | ssl_set_client_disabled(s); | |
3547 | ||
f63a17d6 MC |
3548 | if (sk == NULL) { |
3549 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, | |
3550 | ERR_R_INTERNAL_ERROR); | |
26a7d938 | 3551 | return 0; |
f63a17d6 | 3552 | } |
d45ba43d | 3553 | |
2c7b4dbc MC |
3554 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3555 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3556 | # error Max cipher length too short | |
3557 | # endif | |
3558 | /* | |
3559 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3560 | * chop number of supported ciphers to keep it well below this if we | |
3561 | * use TLS v1.2 | |
3562 | */ | |
3563 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3564 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3565 | else | |
3566 | #endif | |
3567 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3568 | maxlen = 0xfffe; | |
3569 | ||
3570 | if (empty_reneg_info_scsv) | |
3571 | maxlen -= 2; | |
3572 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3573 | maxlen -= 2; | |
3574 | ||
3575 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3576 | const SSL_CIPHER *c; | |
3577 | ||
d45ba43d MC |
3578 | c = sk_SSL_CIPHER_value(sk, i); |
3579 | /* Skip disabled ciphers */ | |
8af91fd9 | 3580 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3581 | continue; |
2c7b4dbc MC |
3582 | |
3583 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
f63a17d6 MC |
3584 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3585 | ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3586 | return 0; |
3587 | } | |
3588 | ||
aafec89c MC |
3589 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3590 | if (!maxverok) { | |
3591 | if (SSL_IS_DTLS(s)) { | |
3592 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3593 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3594 | maxverok = 1; | |
3595 | } else { | |
3596 | if (c->max_tls >= s->s3->tmp.max_ver | |
3597 | && c->min_tls <= s->s3->tmp.max_ver) | |
3598 | maxverok = 1; | |
3599 | } | |
3600 | } | |
3601 | ||
2c7b4dbc | 3602 | totlen += len; |
d45ba43d | 3603 | } |
2c7b4dbc | 3604 | |
aafec89c | 3605 | if (totlen == 0 || !maxverok) { |
f63a17d6 MC |
3606 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CIPHER_LIST_TO_BYTES, |
3607 | SSL_R_NO_CIPHERS_AVAILABLE); | |
aafec89c MC |
3608 | |
3609 | if (!maxverok) | |
3610 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3611 | "SSL/TLS version"); | |
3612 | ||
2c7b4dbc MC |
3613 | return 0; |
3614 | } | |
3615 | ||
3616 | if (totlen != 0) { | |
d45ba43d MC |
3617 | if (empty_reneg_info_scsv) { |
3618 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3619 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3620 | }; |
2c7b4dbc | 3621 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3622 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3623 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3624 | return 0; |
3625 | } | |
d45ba43d MC |
3626 | } |
3627 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3628 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3629 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3630 | }; |
2c7b4dbc | 3631 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
f63a17d6 MC |
3632 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3633 | SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
2c7b4dbc MC |
3634 | return 0; |
3635 | } | |
d45ba43d MC |
3636 | } |
3637 | } | |
3638 | ||
2c7b4dbc | 3639 | return 1; |
d45ba43d | 3640 | } |
ef6c191b MC |
3641 | |
3642 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3643 | { | |
3644 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3645 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
635c8f77 MC |
3646 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3647 | SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3648 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
ef6c191b MC |
3649 | return 0; |
3650 | } | |
3651 | ||
3652 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3653 | return 1; | |
3654 | } |