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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 */ |
672f3337 | 366 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); |
340a2828 | 367 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
368 | return 0; |
369 | } | |
370 | ||
371 | /* | |
0f1e51ea MC |
372 | * ossl_statem_client13_write_transition() works out what handshake state to |
373 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
374 | * server. | |
0f1e51ea MC |
375 | */ |
376 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s) | |
377 | { | |
378 | OSSL_STATEM *st = &s->statem; | |
379 | ||
380 | /* | |
3847d426 MC |
381 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
382 | * TLSv1.3 yet at that point. They are handled by | |
383 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
384 | */ |
385 | switch (st->hand_state) { | |
386 | default: | |
387 | /* Shouldn't happen */ | |
388 | return WRITE_TRAN_ERROR; | |
389 | ||
3847d426 MC |
390 | case TLS_ST_CW_CLNT_HELLO: |
391 | /* We only hit this in the case of HelloRetryRequest */ | |
392 | return WRITE_TRAN_FINISHED; | |
393 | ||
394 | case TLS_ST_CR_HELLO_RETRY_REQUEST: | |
395 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
396 | return WRITE_TRAN_CONTINUE; | |
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 */ | |
472 | return WRITE_TRAN_ERROR; | |
473 | ||
a230b26e | 474 | case TLS_ST_OK: |
c7f47786 MC |
475 | if (!s->renegotiate) { |
476 | /* | |
477 | * We haven't requested a renegotiation ourselves so we must have | |
478 | * received a message from the server. Better read it. | |
479 | */ | |
480 | return WRITE_TRAN_FINISHED; | |
481 | } | |
018fcbec BE |
482 | /* Renegotiation */ |
483 | /* fall thru */ | |
a230b26e EK |
484 | case TLS_ST_BEFORE: |
485 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
486 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 487 | |
a230b26e | 488 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
489 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
490 | /* | |
491 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
492 | * actually selected a version yet. | |
493 | */ | |
d7f8783f | 494 | st->hand_state = TLS_ST_EARLY_DATA; |
49e7fe12 MC |
495 | return WRITE_TRAN_CONTINUE; |
496 | } | |
a230b26e EK |
497 | /* |
498 | * No transition at the end of writing because we don't know what | |
499 | * we will be sent | |
500 | */ | |
501 | return WRITE_TRAN_FINISHED; | |
61ae935a | 502 | |
d7f8783f | 503 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
504 | return WRITE_TRAN_FINISHED; |
505 | ||
a230b26e EK |
506 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
507 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
508 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 509 | |
a230b26e EK |
510 | case TLS_ST_CR_SRVR_DONE: |
511 | if (s->s3->tmp.cert_req) | |
512 | st->hand_state = TLS_ST_CW_CERT; | |
513 | else | |
61ae935a | 514 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 515 | return WRITE_TRAN_CONTINUE; |
61ae935a | 516 | |
a230b26e EK |
517 | case TLS_ST_CW_CERT: |
518 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
519 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 520 | |
a230b26e EK |
521 | case TLS_ST_CW_KEY_EXCH: |
522 | /* | |
523 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
524 | * sent, but no verify packet is sent | |
525 | */ | |
526 | /* | |
527 | * XXX: For now, we do not support client authentication in ECDH | |
528 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
529 | * need to skip the certificate verify message when client's | |
530 | * ECDH public key is sent inside the client certificate. | |
531 | */ | |
532 | if (s->s3->tmp.cert_req == 1) { | |
533 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
534 | } else { | |
61ae935a | 535 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e EK |
536 | } |
537 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
538 | st->hand_state = TLS_ST_CW_CHANGE; | |
539 | } | |
540 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 541 | |
a230b26e EK |
542 | case TLS_ST_CW_CERT_VRFY: |
543 | st->hand_state = TLS_ST_CW_CHANGE; | |
544 | return WRITE_TRAN_CONTINUE; | |
545 | ||
546 | case TLS_ST_CW_CHANGE: | |
61ae935a | 547 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
4004ce5f MC |
548 | st-> |
549 | hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 550 | #else |
aff8c126 | 551 | if (!SSL_IS_DTLS(s) && s->s3->npn_seen) |
a230b26e EK |
552 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
553 | else | |
554 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 555 | #endif |
a230b26e | 556 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
557 | |
558 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
559 | case TLS_ST_CW_NEXT_PROTO: |
560 | st->hand_state = TLS_ST_CW_FINISHED; | |
561 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
562 | #endif |
563 | ||
a230b26e EK |
564 | case TLS_ST_CW_FINISHED: |
565 | if (s->hit) { | |
566 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
567 | return WRITE_TRAN_CONTINUE; |
568 | } else { | |
569 | return WRITE_TRAN_FINISHED; | |
570 | } | |
61ae935a | 571 | |
a230b26e EK |
572 | case TLS_ST_CR_FINISHED: |
573 | if (s->hit) { | |
574 | st->hand_state = TLS_ST_CW_CHANGE; | |
575 | return WRITE_TRAN_CONTINUE; | |
576 | } else { | |
577 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
578 | return WRITE_TRAN_CONTINUE; |
579 | } | |
c7f47786 MC |
580 | |
581 | case TLS_ST_CR_HELLO_REQ: | |
582 | /* | |
583 | * If we can renegotiate now then do so, otherwise wait for a more | |
584 | * convenient time. | |
585 | */ | |
586 | if (ssl3_renegotiate_check(s, 1)) { | |
587 | if (!tls_setup_handshake(s)) { | |
588 | ossl_statem_set_error(s); | |
589 | return WRITE_TRAN_ERROR; | |
590 | } | |
591 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
592 | return WRITE_TRAN_CONTINUE; | |
593 | } | |
594 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 595 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
596 | } |
597 | } | |
598 | ||
599 | /* | |
600 | * Perform any pre work that needs to be done prior to sending a message from | |
601 | * the client to the server. | |
602 | */ | |
8481f583 | 603 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 604 | { |
d6f1a6e9 | 605 | OSSL_STATEM *st = &s->statem; |
61ae935a | 606 | |
a230b26e | 607 | switch (st->hand_state) { |
f3b3d7f0 RS |
608 | default: |
609 | /* No pre work to be done */ | |
610 | break; | |
611 | ||
61ae935a MC |
612 | case TLS_ST_CW_CLNT_HELLO: |
613 | s->shutdown = 0; | |
614 | if (SSL_IS_DTLS(s)) { | |
615 | /* every DTLS ClientHello resets Finished MAC */ | |
2c4a056f MC |
616 | if (!ssl3_init_finished_mac(s)) { |
617 | ossl_statem_set_error(s); | |
618 | return WORK_ERROR; | |
619 | } | |
61ae935a MC |
620 | } |
621 | break; | |
622 | ||
61ae935a MC |
623 | case TLS_ST_CW_CHANGE: |
624 | if (SSL_IS_DTLS(s)) { | |
625 | if (s->hit) { | |
626 | /* | |
627 | * We're into the last flight so we don't retransmit these | |
628 | * messages unless we need to. | |
629 | */ | |
630 | st->use_timer = 0; | |
631 | } | |
632 | #ifndef OPENSSL_NO_SCTP | |
633 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
634 | return dtls_wait_for_dry(s); | |
635 | #endif | |
636 | } | |
f3b3d7f0 | 637 | break; |
61ae935a | 638 | |
d7f8783f | 639 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
640 | /* |
641 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
642 | * attempt to write early data before calling SSL_read() then we press | |
643 | * on with the handshake. Otherwise we pause here. | |
644 | */ | |
645 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
646 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
647 | return WORK_FINISHED_CONTINUE; | |
648 | /* Fall through */ | |
649 | ||
650 | case TLS_ST_EARLY_DATA: | |
61ae935a | 651 | case TLS_ST_OK: |
30f05b19 | 652 | return tls_finish_handshake(s, wst, 1); |
61ae935a MC |
653 | } |
654 | ||
655 | return WORK_FINISHED_CONTINUE; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Perform any work that needs to be done after sending a message from the | |
660 | * client to the server. | |
661 | */ | |
8481f583 | 662 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 663 | { |
d6f1a6e9 | 664 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
665 | |
666 | s->init_num = 0; | |
667 | ||
a230b26e | 668 | switch (st->hand_state) { |
f3b3d7f0 RS |
669 | default: |
670 | /* No post work to be done */ | |
671 | break; | |
672 | ||
61ae935a | 673 | case TLS_ST_CW_CLNT_HELLO: |
46417569 | 674 | if (wst == WORK_MORE_A && statem_flush(s) != 1) |
61ae935a | 675 | return WORK_MORE_A; |
46417569 | 676 | |
61ae935a MC |
677 | if (SSL_IS_DTLS(s)) { |
678 | /* Treat the next message as the first packet */ | |
679 | s->first_packet = 1; | |
680 | } | |
6cb42265 MC |
681 | |
682 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
683 | && s->max_early_data > 0) { | |
684 | /* | |
685 | * We haven't selected TLSv1.3 yet so we don't call the change | |
686 | * cipher state function associated with the SSL_METHOD. Instead | |
687 | * we call tls13_change_cipher_state() directly. | |
688 | */ | |
689 | if (!tls13_change_cipher_state(s, | |
690 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
1ea4d09a | 691 | return WORK_ERROR; |
6cb42265 | 692 | } |
61ae935a MC |
693 | break; |
694 | ||
ef6c191b MC |
695 | case TLS_ST_CW_END_OF_EARLY_DATA: |
696 | /* | |
697 | * We set the enc_write_ctx back to NULL because we may end up writing | |
698 | * in cleartext again if we get a HelloRetryRequest from the server. | |
699 | */ | |
700 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
701 | s->enc_write_ctx = NULL; | |
702 | break; | |
703 | ||
61ae935a MC |
704 | case TLS_ST_CW_KEY_EXCH: |
705 | if (tls_client_key_exchange_post_work(s) == 0) | |
706 | return WORK_ERROR; | |
707 | break; | |
708 | ||
709 | case TLS_ST_CW_CHANGE: | |
710 | s->session->cipher = s->s3->tmp.new_cipher; | |
711 | #ifdef OPENSSL_NO_COMP | |
712 | s->session->compress_meth = 0; | |
713 | #else | |
714 | if (s->s3->tmp.new_compression == NULL) | |
715 | s->session->compress_meth = 0; | |
716 | else | |
717 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
718 | #endif | |
719 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
720 | return WORK_ERROR; | |
721 | ||
722 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
723 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
724 | return WORK_ERROR; | |
725 | ||
726 | if (SSL_IS_DTLS(s)) { | |
727 | #ifndef OPENSSL_NO_SCTP | |
728 | if (s->hit) { | |
729 | /* | |
730 | * Change to new shared key of SCTP-Auth, will be ignored if | |
731 | * no SCTP used. | |
732 | */ | |
733 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
734 | 0, NULL); | |
735 | } | |
736 | #endif | |
737 | ||
738 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
739 | } | |
740 | break; | |
741 | ||
742 | case TLS_ST_CW_FINISHED: | |
743 | #ifndef OPENSSL_NO_SCTP | |
744 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
745 | /* | |
746 | * Change to new shared key of SCTP-Auth, will be ignored if | |
747 | * no SCTP used. | |
748 | */ | |
749 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
750 | 0, NULL); | |
751 | } | |
752 | #endif | |
753 | if (statem_flush(s) != 1) | |
754 | return WORK_MORE_B; | |
92760c21 MC |
755 | |
756 | if (SSL_IS_TLS13(s)) { | |
757 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
758 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
759 | return WORK_ERROR; | |
760 | } | |
61ae935a | 761 | break; |
9412b3ad MC |
762 | |
763 | case TLS_ST_CW_KEY_UPDATE: | |
764 | if (statem_flush(s) != 1) | |
765 | return WORK_MORE_A; | |
57389a32 MC |
766 | if (!tls13_update_key(s, 1)) |
767 | return WORK_ERROR; | |
9412b3ad | 768 | break; |
61ae935a MC |
769 | } |
770 | ||
771 | return WORK_FINISHED_CONTINUE; | |
772 | } | |
773 | ||
774 | /* | |
6392fb8e MC |
775 | * Get the message construction function and message type for sending from the |
776 | * client | |
61ae935a MC |
777 | * |
778 | * Valid return values are: | |
779 | * 1: Success | |
780 | * 0: Error | |
781 | */ | |
6392fb8e | 782 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 783 | confunc_f *confunc, int *mt) |
61ae935a | 784 | { |
d6f1a6e9 | 785 | OSSL_STATEM *st = &s->statem; |
61ae935a | 786 | |
4a01c59f MC |
787 | switch (st->hand_state) { |
788 | default: | |
789 | /* Shouldn't happen */ | |
790 | return 0; | |
791 | ||
792 | case TLS_ST_CW_CHANGE: | |
5923ad4b | 793 | if (SSL_IS_DTLS(s)) |
6392fb8e | 794 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 795 | else |
6392fb8e MC |
796 | *confunc = tls_construct_change_cipher_spec; |
797 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
798 | break; |
799 | ||
800 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
801 | *confunc = tls_construct_client_hello; |
802 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
803 | break; |
804 | ||
ef6c191b MC |
805 | case TLS_ST_CW_END_OF_EARLY_DATA: |
806 | *confunc = tls_construct_end_of_early_data; | |
807 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
808 | break; | |
809 | ||
810 | case TLS_ST_PENDING_EARLY_DATA_END: | |
811 | *confunc = NULL; | |
812 | *mt = SSL3_MT_DUMMY; | |
813 | break; | |
814 | ||
4a01c59f | 815 | case TLS_ST_CW_CERT: |
6392fb8e MC |
816 | *confunc = tls_construct_client_certificate; |
817 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
818 | break; |
819 | ||
820 | case TLS_ST_CW_KEY_EXCH: | |
6392fb8e MC |
821 | *confunc = tls_construct_client_key_exchange; |
822 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
823 | break; |
824 | ||
825 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 826 | *confunc = tls_construct_cert_verify; |
6392fb8e | 827 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 828 | break; |
61ae935a MC |
829 | |
830 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 831 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
832 | *confunc = tls_construct_next_proto; |
833 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 834 | break; |
61ae935a | 835 | #endif |
4a01c59f | 836 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
837 | *confunc = tls_construct_finished; |
838 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 839 | break; |
9412b3ad MC |
840 | |
841 | case TLS_ST_CW_KEY_UPDATE: | |
842 | *confunc = tls_construct_key_update; | |
843 | *mt = SSL3_MT_KEY_UPDATE; | |
844 | break; | |
4a01c59f | 845 | } |
5923ad4b | 846 | |
5923ad4b | 847 | return 1; |
61ae935a MC |
848 | } |
849 | ||
850 | /* | |
851 | * Returns the maximum allowed length for the current message that we are | |
852 | * reading. Excludes the message header. | |
853 | */ | |
eda75751 | 854 | size_t ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 855 | { |
d6f1a6e9 | 856 | OSSL_STATEM *st = &s->statem; |
61ae935a | 857 | |
a230b26e | 858 | switch (st->hand_state) { |
f3b3d7f0 RS |
859 | default: |
860 | /* Shouldn't happen */ | |
861 | return 0; | |
862 | ||
a230b26e EK |
863 | case TLS_ST_CR_SRVR_HELLO: |
864 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 865 | |
a230b26e EK |
866 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
867 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 868 | |
3847d426 MC |
869 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
870 | return HELLO_RETRY_REQUEST_MAX_LENGTH; | |
871 | ||
a230b26e EK |
872 | case TLS_ST_CR_CERT: |
873 | return s->max_cert_list; | |
61ae935a | 874 | |
2c5dfdc3 MC |
875 | case TLS_ST_CR_CERT_VRFY: |
876 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
877 | ||
a230b26e EK |
878 | case TLS_ST_CR_CERT_STATUS: |
879 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 880 | |
a230b26e EK |
881 | case TLS_ST_CR_KEY_EXCH: |
882 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 883 | |
a230b26e EK |
884 | case TLS_ST_CR_CERT_REQ: |
885 | /* | |
886 | * Set to s->max_cert_list for compatibility with previous releases. In | |
887 | * practice these messages can get quite long if servers are configured | |
888 | * to provide a long list of acceptable CAs | |
889 | */ | |
890 | return s->max_cert_list; | |
61ae935a | 891 | |
a230b26e EK |
892 | case TLS_ST_CR_SRVR_DONE: |
893 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 894 | |
a230b26e EK |
895 | case TLS_ST_CR_CHANGE: |
896 | if (s->version == DTLS1_BAD_VER) | |
897 | return 3; | |
898 | return CCS_MAX_LENGTH; | |
61ae935a | 899 | |
a230b26e EK |
900 | case TLS_ST_CR_SESSION_TICKET: |
901 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 902 | |
a230b26e EK |
903 | case TLS_ST_CR_FINISHED: |
904 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
905 | |
906 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
907 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
908 | |
909 | case TLS_ST_CR_KEY_UPDATE: | |
910 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 911 | } |
61ae935a MC |
912 | } |
913 | ||
914 | /* | |
915 | * Process a message that the client has been received from the server. | |
916 | */ | |
8481f583 | 917 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 918 | { |
d6f1a6e9 | 919 | OSSL_STATEM *st = &s->statem; |
61ae935a | 920 | |
a230b26e | 921 | switch (st->hand_state) { |
f3b3d7f0 RS |
922 | default: |
923 | /* Shouldn't happen */ | |
924 | return MSG_PROCESS_ERROR; | |
925 | ||
a230b26e EK |
926 | case TLS_ST_CR_SRVR_HELLO: |
927 | return tls_process_server_hello(s, pkt); | |
61ae935a | 928 | |
a230b26e EK |
929 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
930 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 931 | |
3847d426 MC |
932 | case TLS_ST_CR_HELLO_RETRY_REQUEST: |
933 | return tls_process_hello_retry_request(s, pkt); | |
934 | ||
a230b26e EK |
935 | case TLS_ST_CR_CERT: |
936 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 937 | |
2c5dfdc3 MC |
938 | case TLS_ST_CR_CERT_VRFY: |
939 | return tls_process_cert_verify(s, pkt); | |
940 | ||
a230b26e EK |
941 | case TLS_ST_CR_CERT_STATUS: |
942 | return tls_process_cert_status(s, pkt); | |
61ae935a | 943 | |
a230b26e EK |
944 | case TLS_ST_CR_KEY_EXCH: |
945 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 946 | |
a230b26e EK |
947 | case TLS_ST_CR_CERT_REQ: |
948 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 949 | |
a230b26e EK |
950 | case TLS_ST_CR_SRVR_DONE: |
951 | return tls_process_server_done(s, pkt); | |
61ae935a | 952 | |
a230b26e EK |
953 | case TLS_ST_CR_CHANGE: |
954 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 955 | |
a230b26e EK |
956 | case TLS_ST_CR_SESSION_TICKET: |
957 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 958 | |
a230b26e EK |
959 | case TLS_ST_CR_FINISHED: |
960 | return tls_process_finished(s, pkt); | |
e46f2334 | 961 | |
c7f47786 MC |
962 | case TLS_ST_CR_HELLO_REQ: |
963 | return tls_process_hello_req(s, pkt); | |
964 | ||
e46f2334 MC |
965 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
966 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
967 | |
968 | case TLS_ST_CR_KEY_UPDATE: | |
969 | return tls_process_key_update(s, pkt); | |
61ae935a | 970 | } |
61ae935a MC |
971 | } |
972 | ||
973 | /* | |
974 | * Perform any further processing required following the receipt of a message | |
975 | * from the server | |
976 | */ | |
8481f583 | 977 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 978 | { |
d6f1a6e9 | 979 | OSSL_STATEM *st = &s->statem; |
61ae935a | 980 | |
a230b26e | 981 | switch (st->hand_state) { |
f3b3d7f0 RS |
982 | default: |
983 | /* Shouldn't happen */ | |
984 | return WORK_ERROR; | |
985 | ||
05c4f1d5 MC |
986 | case TLS_ST_CR_CERT_REQ: |
987 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 988 | } |
61ae935a MC |
989 | } |
990 | ||
7cea05dc | 991 | int tls_construct_client_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 992 | { |
2c7b4dbc | 993 | unsigned char *p; |
ec60ccc1 MC |
994 | size_t sess_id_len; |
995 | int i, protverr; | |
2c7b4dbc | 996 | int al = SSL_AD_HANDSHAKE_FAILURE; |
09b6c2ef | 997 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
998 | SSL_COMP *comp; |
999 | #endif | |
b9908bf9 | 1000 | SSL_SESSION *sess = s->session; |
0f113f3e | 1001 | |
7cea05dc | 1002 | if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) { |
2c7b4dbc MC |
1003 | /* Should not happen */ |
1004 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
7cea05dc | 1005 | return 0; |
2c7b4dbc | 1006 | } |
0f113f3e | 1007 | |
b9908bf9 | 1008 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1009 | protverr = ssl_set_client_hello_version(s); |
1010 | if (protverr != 0) { | |
1011 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
7cea05dc | 1012 | return 0; |
4fa52141 | 1013 | } |
0f113f3e | 1014 | |
e586eac8 MC |
1015 | if (sess == NULL |
1016 | || !ssl_version_supported(s, sess->ssl_version) | |
1017 | || !SSL_SESSION_is_resumable(sess)) { | |
b9908bf9 | 1018 | if (!ssl_get_new_session(s, 0)) |
7cea05dc | 1019 | return 0; |
b9908bf9 MC |
1020 | } |
1021 | /* else use the pre-loaded session */ | |
0f113f3e | 1022 | |
b9908bf9 | 1023 | p = s->s3->client_random; |
0f113f3e | 1024 | |
b9908bf9 MC |
1025 | /* |
1026 | * for DTLS if client_random is initialized, reuse it, we are | |
1027 | * required to use same upon reply to HelloVerify | |
1028 | */ | |
1029 | if (SSL_IS_DTLS(s)) { | |
1030 | size_t idx; | |
1031 | i = 1; | |
1032 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
1033 | if (p[idx]) { | |
1034 | i = 0; | |
1035 | break; | |
0f113f3e | 1036 | } |
0f113f3e | 1037 | } |
b9908bf9 MC |
1038 | } else |
1039 | i = 1; | |
0f113f3e | 1040 | |
f7f2a01d MC |
1041 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random), |
1042 | DOWNGRADE_NONE) <= 0) | |
7cea05dc | 1043 | return 0; |
b9908bf9 | 1044 | |
b9908bf9 MC |
1045 | /*- |
1046 | * version indicates the negotiated version: for example from | |
1047 | * an SSLv2/v3 compatible client hello). The client_version | |
1048 | * field is the maximum version we permit and it is also | |
1049 | * used in RSA encrypted premaster secrets. Some servers can | |
1050 | * choke if we initially report a higher version then | |
1051 | * renegotiate to a lower one in the premaster secret. This | |
1052 | * didn't happen with TLS 1.0 as most servers supported it | |
1053 | * but it can with TLS 1.1 or later if the server only supports | |
1054 | * 1.0. | |
1055 | * | |
1056 | * Possible scenario with previous logic: | |
1057 | * 1. Client hello indicates TLS 1.2 | |
1058 | * 2. Server hello says TLS 1.0 | |
1059 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1060 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1061 | * 5. Server sends hello request to renegotiate. |
1062 | * 6. Client hello indicates TLS v1.0 as we now | |
1063 | * know that is maximum server supports. | |
1064 | * 7. Server chokes on RSA encrypted premaster secret | |
1065 | * containing version 1.0. | |
1066 | * | |
1067 | * For interoperability it should be OK to always use the | |
1068 | * maximum version we support in client hello and then rely | |
1069 | * on the checking of version to ensure the servers isn't | |
1070 | * being inconsistent: for example initially negotiating with | |
1071 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1072 | * client_version in client hello and not resetting it to | |
1073 | * the negotiated version. | |
cd998837 MC |
1074 | * |
1075 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1076 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1077 | */ |
7acb8b64 | 1078 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
7cea05dc | 1079 | || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) { |
2c7b4dbc | 1080 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1081 | return 0; |
2c7b4dbc | 1082 | } |
b9908bf9 MC |
1083 | |
1084 | /* Session ID */ | |
f05bcf0f | 1085 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) |
ec60ccc1 | 1086 | sess_id_len = 0; |
b9908bf9 | 1087 | else |
ec60ccc1 MC |
1088 | sess_id_len = s->session->session_id_length; |
1089 | if (sess_id_len > sizeof(s->session->session_id) | |
7cea05dc | 1090 | || !WPACKET_start_sub_packet_u8(pkt) |
ec60ccc1 MC |
1091 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id, |
1092 | sess_id_len)) | |
7cea05dc | 1093 | || !WPACKET_close(pkt)) { |
2c7b4dbc | 1094 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1095 | return 0; |
b9908bf9 | 1096 | } |
0f113f3e | 1097 | |
b9908bf9 MC |
1098 | /* cookie stuff for DTLS */ |
1099 | if (SSL_IS_DTLS(s)) { | |
2c7b4dbc | 1100 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1101 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1102 | s->d1->cookie_len)) { |
b9908bf9 | 1103 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1104 | return 0; |
0f113f3e | 1105 | } |
b9908bf9 MC |
1106 | } |
1107 | ||
1108 | /* Ciphers supported */ | |
7cea05dc | 1109 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
2c7b4dbc | 1110 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1111 | return 0; |
2c7b4dbc MC |
1112 | } |
1113 | /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */ | |
7cea05dc MC |
1114 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt)) |
1115 | return 0; | |
1116 | if (!WPACKET_close(pkt)) { | |
2c7b4dbc | 1117 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1118 | return 0; |
b9908bf9 | 1119 | } |
0f113f3e | 1120 | |
b9908bf9 | 1121 | /* COMPRESSION */ |
7cea05dc | 1122 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
2c7b4dbc | 1123 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1124 | return 0; |
2c7b4dbc MC |
1125 | } |
1126 | #ifndef OPENSSL_NO_COMP | |
c19602b5 MC |
1127 | if (ssl_allow_compression(s) |
1128 | && s->ctx->comp_methods | |
1129 | && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) { | |
2c7b4dbc MC |
1130 | int compnum = sk_SSL_COMP_num(s->ctx->comp_methods); |
1131 | for (i = 0; i < compnum; i++) { | |
1132 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
7cea05dc | 1133 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
2c7b4dbc | 1134 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1135 | return 0; |
2c7b4dbc MC |
1136 | } |
1137 | } | |
b9908bf9 | 1138 | } |
09b6c2ef | 1139 | #endif |
2c7b4dbc | 1140 | /* Add the NULL method */ |
7cea05dc | 1141 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
2c7b4dbc | 1142 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1143 | return 0; |
2c7b4dbc | 1144 | } |
761772d7 | 1145 | |
b9908bf9 | 1146 | /* TLS extensions */ |
fe874d27 | 1147 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0, &al)) { |
b9908bf9 | 1148 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
7cea05dc | 1149 | return 0; |
b9908bf9 | 1150 | } |
0f113f3e | 1151 | |
b9908bf9 | 1152 | return 1; |
0f113f3e | 1153 | } |
d02b48c6 | 1154 | |
be3583fa | 1155 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1156 | { |
1157 | int al; | |
cb150cbc | 1158 | size_t cookie_len; |
8ba708e5 MC |
1159 | PACKET cookiepkt; |
1160 | ||
1161 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1162 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
8ba708e5 MC |
1163 | al = SSL_AD_DECODE_ERROR; |
1164 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1165 | goto f_err; | |
1166 | } | |
1167 | ||
1168 | cookie_len = PACKET_remaining(&cookiepkt); | |
1169 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1170 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1171 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1172 | goto f_err; | |
1173 | } | |
1174 | ||
1175 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1176 | al = SSL_AD_DECODE_ERROR; | |
1177 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1178 | goto f_err; | |
1179 | } | |
1180 | s->d1->cookie_len = cookie_len; | |
1181 | ||
1182 | return MSG_PROCESS_FINISHED_READING; | |
1183 | f_err: | |
1184 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1185 | ossl_statem_set_error(s); |
8ba708e5 MC |
1186 | return MSG_PROCESS_ERROR; |
1187 | } | |
1188 | ||
11c67eea | 1189 | static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars) |
b9908bf9 MC |
1190 | { |
1191 | STACK_OF(SSL_CIPHER) *sk; | |
1192 | const SSL_CIPHER *c; | |
11c67eea MC |
1193 | int i; |
1194 | ||
1195 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1196 | if (c == NULL) { | |
1197 | /* unknown cipher */ | |
1198 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_UNKNOWN_CIPHER_RETURNED); | |
1199 | return 0; | |
1200 | } | |
1201 | /* | |
1202 | * If it is a disabled cipher we either didn't send it in client hello, | |
1203 | * or it's not allowed for the selected protocol. So we return an error. | |
1204 | */ | |
8af91fd9 | 1205 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
11c67eea MC |
1206 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | sk = ssl_get_ciphers_by_id(s); | |
1211 | i = sk_SSL_CIPHER_find(sk, c); | |
1212 | if (i < 0) { | |
1213 | /* we did not say we would use this cipher */ | |
1214 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL | |
1219 | && s->s3->tmp.new_cipher->id != c->id) { | |
1220 | /* ServerHello selected a different ciphersuite to that in the HRR */ | |
1221 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED); | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Depending on the session caching (internal/external), the cipher | |
1227 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1228 | * set and use it for comparison. | |
1229 | */ | |
1230 | if (s->session->cipher != NULL) | |
1231 | s->session->cipher_id = s->session->cipher->id; | |
1232 | if (s->hit && (s->session->cipher_id != c->id)) { | |
a055a881 MC |
1233 | if (SSL_IS_TLS13(s)) { |
1234 | /* | |
1235 | * In TLSv1.3 it is valid for the server to select a different | |
1236 | * ciphersuite as long as the hash is the same. | |
1237 | */ | |
1238 | if (ssl_md(c->algorithm2) | |
1239 | != ssl_md(s->session->cipher->algorithm2)) { | |
1240 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, | |
1241 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); | |
1242 | return 0; | |
1243 | } | |
1244 | } else { | |
1245 | /* | |
1246 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1247 | * ciphersuite. | |
1248 | */ | |
1249 | SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, | |
1250 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
1251 | return 0; | |
1252 | } | |
11c67eea MC |
1253 | } |
1254 | s->s3->tmp.new_cipher = c; | |
1255 | ||
1256 | return 1; | |
1257 | } | |
1258 | ||
1259 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) | |
1260 | { | |
332eb390 | 1261 | PACKET session_id, extpkt; |
b9908bf9 | 1262 | size_t session_id_len; |
b6981744 | 1263 | const unsigned char *cipherchars; |
11c67eea | 1264 | int al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1265 | unsigned int compression; |
4fa52141 | 1266 | unsigned int sversion; |
3434f40b | 1267 | unsigned int context; |
4fa52141 | 1268 | int protverr; |
332eb390 | 1269 | RAW_EXTENSION *extensions = NULL; |
b9908bf9 MC |
1270 | #ifndef OPENSSL_NO_COMP |
1271 | SSL_COMP *comp; | |
1272 | #endif | |
1273 | ||
4fa52141 VD |
1274 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1275 | al = SSL_AD_DECODE_ERROR; | |
1276 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1277 | goto f_err; | |
1278 | } | |
50932c4a | 1279 | |
c3043dcd MC |
1280 | /* load the server random */ |
1281 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { | |
1282 | al = SSL_AD_DECODE_ERROR; | |
1283 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1284 | goto f_err; | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * We do this immediately so we know what format the ServerHello is in. | |
1289 | * Must be done after reading the random data so we can check for the | |
1290 | * TLSv1.3 downgrade sentinels | |
1291 | */ | |
1292 | protverr = ssl_choose_client_version(s, sversion, 1, &al); | |
4fa52141 | 1293 | if (protverr != 0) { |
4fa52141 VD |
1294 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); |
1295 | goto f_err; | |
0f113f3e | 1296 | } |
0f113f3e | 1297 | |
524420d8 MC |
1298 | /* |
1299 | * In TLSv1.3 a ServerHello message signals a key change so the end of the | |
1300 | * message must be on a record boundary. | |
1301 | */ | |
1302 | if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1303 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1304 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_NOT_ON_RECORD_BOUNDARY); | |
1305 | goto f_err; | |
1306 | } | |
1307 | ||
fc5ce51d | 1308 | /* Get the session-id. */ |
71728dd8 MC |
1309 | if (!SSL_IS_TLS13(s)) { |
1310 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
1311 | al = SSL_AD_DECODE_ERROR; | |
1312 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1313 | goto f_err; | |
1314 | } | |
1315 | session_id_len = PACKET_remaining(&session_id); | |
1316 | if (session_id_len > sizeof s->session->session_id | |
1317 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
1318 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1319 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1320 | SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1321 | goto f_err; | |
1322 | } | |
1323 | } else { | |
625b0d51 | 1324 | PACKET_null_init(&session_id); |
71728dd8 | 1325 | session_id_len = 0; |
0f113f3e | 1326 | } |
e481f9b9 | 1327 | |
73999b62 | 1328 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1329 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1330 | al = SSL_AD_DECODE_ERROR; |
1331 | goto f_err; | |
1332 | } | |
1333 | ||
4ff65f77 MC |
1334 | if (!SSL_IS_TLS13(s)) { |
1335 | if (!PACKET_get_1(pkt, &compression)) { | |
1336 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1337 | al = SSL_AD_DECODE_ERROR; | |
1338 | goto f_err; | |
1339 | } | |
1340 | } else { | |
1341 | compression = 0; | |
1342 | } | |
1343 | ||
1344 | /* TLS extensions */ | |
1345 | if (PACKET_remaining(pkt) == 0) { | |
1346 | PACKET_null_init(&extpkt); | |
26b9172a MC |
1347 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1348 | || PACKET_remaining(pkt) != 0) { | |
4ff65f77 MC |
1349 | al = SSL_AD_DECODE_ERROR; |
1350 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH); | |
1351 | goto f_err; | |
1352 | } | |
1353 | ||
fe874d27 MC |
1354 | context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1355 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
735d5b59 | 1356 | if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL, 1)) |
4ff65f77 MC |
1357 | goto f_err; |
1358 | ||
1359 | s->hit = 0; | |
1360 | ||
1361 | if (SSL_IS_TLS13(s)) { | |
1362 | /* This will set s->hit if we are resuming */ | |
1363 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1364 | SSL_EXT_TLS1_3_SERVER_HELLO, |
4ff65f77 MC |
1365 | extensions, NULL, 0, &al)) |
1366 | goto f_err; | |
1367 | } else { | |
8c1a5343 | 1368 | /* |
4ff65f77 MC |
1369 | * Check if we can resume the session based on external pre-shared |
1370 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1371 | * Resumption based on server-side state works with session IDs. | |
1372 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1373 | * works by overriding the SessionTicket extension at the application | |
1374 | * layer, and does not send a session ID. (We do not know whether | |
1375 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1376 | * ID alone is not a reliable indicator of session resumption, so we | |
1377 | * first check if we can resume, and later peek at the next handshake | |
1378 | * message to see if the server wants to resume. | |
8c1a5343 | 1379 | */ |
4ff65f77 MC |
1380 | if (s->version >= TLS1_VERSION |
1381 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1382 | const SSL_CIPHER *pref_cipher = NULL; | |
1383 | /* | |
1384 | * s->session->master_key_length is a size_t, but this is an int for | |
1385 | * backwards compat reasons | |
1386 | */ | |
1387 | int master_key_length; | |
1388 | master_key_length = sizeof(s->session->master_key); | |
1389 | if (s->ext.session_secret_cb(s, s->session->master_key, | |
1390 | &master_key_length, | |
1391 | NULL, &pref_cipher, | |
1392 | s->ext.session_secret_cb_arg) | |
1393 | && master_key_length > 0) { | |
1394 | s->session->master_key_length = master_key_length; | |
1395 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1396 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 MC |
1397 | } else { |
1398 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1399 | al = SSL_AD_INTERNAL_ERROR; | |
1400 | goto f_err; | |
1401 | } | |
0f113f3e | 1402 | } |
4ff65f77 MC |
1403 | |
1404 | if (session_id_len != 0 | |
1405 | && session_id_len == s->session->session_id_length | |
1406 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1407 | session_id_len) == 0) | |
1408 | s->hit = 1; | |
50932c4a MC |
1409 | } |
1410 | ||
4ff65f77 | 1411 | if (s->hit) { |
0f113f3e | 1412 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1413 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e MC |
1414 | /* actually a client application bug */ |
1415 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1416 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1417 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1418 | goto f_err; | |
1419 | } | |
6e3d0153 | 1420 | } else { |
0f113f3e | 1421 | /* |
6e3d0153 | 1422 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1423 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1424 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1425 | * so the PAC-based session secret is always preserved. It'll be | |
1426 | * overwritten if the server refuses resumption. | |
0f113f3e | 1427 | */ |
4ff65f77 MC |
1428 | if (s->session->session_id_length > 0 |
1429 | || (SSL_IS_TLS13(s) | |
1430 | && s->session->ext.tick_identity | |
1431 | != TLSEXT_PSK_BAD_IDENTITY)) { | |
4f6eaa59 | 1432 | s->ctx->stats.sess_miss++; |
0f113f3e MC |
1433 | if (!ssl_get_new_session(s, 0)) { |
1434 | goto f_err; | |
1435 | } | |
1436 | } | |
50932c4a | 1437 | |
ccae4a15 | 1438 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1439 | s->session->session_id_length = session_id_len; |
1440 | /* session_id_len could be 0 */ | |
a19fc66a KR |
1441 | if (session_id_len > 0) |
1442 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1443 | session_id_len); | |
0f113f3e | 1444 | } |
fc5ce51d | 1445 | |
ccae4a15 FI |
1446 | /* Session version and negotiated protocol version should match */ |
1447 | if (s->version != s->session->ssl_version) { | |
1448 | al = SSL_AD_PROTOCOL_VERSION; | |
1449 | ||
1450 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1451 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1452 | goto f_err; | |
1453 | } | |
0f113f3e | 1454 | /* |
3eb2aff4 KR |
1455 | * Now that we know the version, update the check to see if it's an allowed |
1456 | * version. | |
1457 | */ | |
1458 | s->s3->tmp.min_ver = s->version; | |
1459 | s->s3->tmp.max_ver = s->version; | |
0f113f3e | 1460 | |
11c67eea | 1461 | if (!set_client_ciphersuite(s, cipherchars)) { |
0f113f3e | 1462 | al = SSL_AD_ILLEGAL_PARAMETER; |
0f113f3e MC |
1463 | goto f_err; |
1464 | } | |
1465 | ||
09b6c2ef | 1466 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1467 | if (compression != 0) { |
0f113f3e | 1468 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1469 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1470 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1471 | goto f_err; | |
1472 | } | |
1473 | /* | |
1474 | * If compression is disabled we'd better not try to resume a session | |
1475 | * using compression. | |
1476 | */ | |
1477 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1478 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1479 | goto f_err; |
1480 | } | |
09b6c2ef | 1481 | #else |
fc5ce51d | 1482 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1483 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1484 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1485 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1486 | goto f_err; | |
1487 | } | |
fc5ce51d | 1488 | if (compression == 0) |
0f113f3e MC |
1489 | comp = NULL; |
1490 | else if (!ssl_allow_compression(s)) { | |
1491 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1492 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1493 | goto f_err; |
fc5ce51d EK |
1494 | } else { |
1495 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1496 | } | |
0f113f3e | 1497 | |
fc5ce51d | 1498 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1499 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1500 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1501 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1502 | goto f_err; | |
1503 | } else { | |
1504 | s->s3->tmp.new_compression = comp; | |
1505 | } | |
09b6c2ef | 1506 | #endif |
761772d7 | 1507 | |
735d5b59 | 1508 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al, 1)) |
332eb390 MC |
1509 | goto f_err; |
1510 | ||
8723588e MC |
1511 | #ifndef OPENSSL_NO_SCTP |
1512 | if (SSL_IS_DTLS(s) && s->hit) { | |
1513 | unsigned char sctpauthkey[64]; | |
1514 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1515 | ||
1516 | /* | |
1517 | * Add new shared key for SCTP-Auth, will be ignored if | |
1518 | * no SCTP used. | |
1519 | */ | |
141eb8c6 MC |
1520 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1521 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1522 | |
1523 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
1524 | sizeof(sctpauthkey), |
1525 | labelbuffer, | |
1526 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
c0aa6b81 | 1527 | goto f_err; |
8723588e MC |
1528 | |
1529 | BIO_ctrl(SSL_get_wbio(s), | |
1530 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1531 | sizeof(sctpauthkey), sctpauthkey); | |
1532 | } | |
1533 | #endif | |
1534 | ||
92760c21 MC |
1535 | /* |
1536 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1537 | * we're done with this message | |
1538 | */ | |
1539 | if (SSL_IS_TLS13(s) | |
1540 | && (!s->method->ssl3_enc->setup_key_block(s) | |
92760c21 MC |
1541 | || !s->method->ssl3_enc->change_cipher_state(s, |
1542 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { | |
1543 | al = SSL_AD_INTERNAL_ERROR; | |
1544 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER); | |
1545 | goto f_err; | |
1546 | } | |
1547 | ||
1b0286a3 | 1548 | OPENSSL_free(extensions); |
b9908bf9 | 1549 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1550 | f_err: |
1551 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1552 | ossl_statem_set_error(s); |
1b0286a3 | 1553 | OPENSSL_free(extensions); |
b9908bf9 | 1554 | return MSG_PROCESS_ERROR; |
0f113f3e | 1555 | } |
d02b48c6 | 1556 | |
3847d426 MC |
1557 | static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt) |
1558 | { | |
1559 | unsigned int sversion; | |
2248dbeb | 1560 | int errorcode; |
11c67eea | 1561 | const unsigned char *cipherchars; |
3847d426 MC |
1562 | RAW_EXTENSION *extensions = NULL; |
1563 | int al; | |
1564 | PACKET extpkt; | |
1565 | ||
1566 | if (!PACKET_get_net_2(pkt, &sversion)) { | |
1567 | al = SSL_AD_DECODE_ERROR; | |
1568 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1569 | goto f_err; | |
1570 | } | |
1571 | ||
1572 | s->hello_retry_request = 1; | |
1573 | ||
d4504fe5 MC |
1574 | /* |
1575 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1576 | * should not be used. | |
1577 | */ | |
1578 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1579 | s->enc_write_ctx = NULL; | |
1580 | ||
3847d426 | 1581 | /* This will fail if it doesn't choose TLSv1.3+ */ |
c3043dcd | 1582 | errorcode = ssl_choose_client_version(s, sversion, 0, &al); |
2248dbeb | 1583 | if (errorcode != 0) { |
2248dbeb | 1584 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1585 | goto f_err; |
1586 | } | |
1587 | ||
11c67eea MC |
1588 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
1589 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1590 | al = SSL_AD_DECODE_ERROR; | |
1591 | goto f_err; | |
1592 | } | |
1593 | ||
1594 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1595 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1596 | goto f_err; | |
1597 | } | |
1598 | ||
66d4bf6b MC |
1599 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1600 | /* Must have a non-empty extensions block */ | |
1601 | || PACKET_remaining(&extpkt) == 0 | |
1602 | /* Must be no trailing data after extensions */ | |
1603 | || PACKET_remaining(pkt) != 0) { | |
3847d426 MC |
1604 | al = SSL_AD_DECODE_ERROR; |
1605 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1606 | goto f_err; | |
1607 | } | |
1608 | ||
fe874d27 | 1609 | if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
735d5b59 | 1610 | &extensions, &al, NULL, 1) |
fe874d27 | 1611 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
735d5b59 | 1612 | extensions, NULL, 0, &al, 1)) |
3847d426 MC |
1613 | goto f_err; |
1614 | ||
1615 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1616 | extensions = NULL; |
1617 | ||
f5d270ca BK |
1618 | if (s->ext.tls13_cookie_len == 0 |
1619 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
1620 | && s->s3->tmp.pkey != NULL | |
1621 | #endif | |
1622 | ) { | |
66d4bf6b MC |
1623 | /* |
1624 | * We didn't receive a cookie or a new key_share so the next | |
1625 | * ClientHello will not change | |
1626 | */ | |
1627 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1628 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, | |
1629 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
1630 | goto f_err; | |
1631 | } | |
3847d426 | 1632 | |
11c67eea MC |
1633 | /* |
1634 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1635 | * a synthetic message_hash in place of ClientHello1. | |
1636 | */ | |
1637 | if (!create_synthetic_message_hash(s)) { | |
1638 | al = SSL_AD_INTERNAL_ERROR; | |
1639 | goto f_err; | |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | * Add this message to the Transcript Hash. Normally this is done | |
1644 | * automatically prior to the message processing stage. However due to the | |
1645 | * need to create the synthetic message hash, we defer that step until now | |
1646 | * for HRR messages. | |
1647 | */ | |
1648 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1649 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
1650 | al = SSL_AD_INTERNAL_ERROR; | |
1651 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); | |
1652 | goto f_err; | |
1653 | } | |
1654 | ||
3847d426 MC |
1655 | return MSG_PROCESS_FINISHED_READING; |
1656 | f_err: | |
1657 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1658 | ossl_statem_set_error(s); | |
1659 | OPENSSL_free(extensions); | |
1660 | return MSG_PROCESS_ERROR; | |
1661 | } | |
1662 | ||
be3583fa | 1663 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 | 1664 | { |
eb5fd03b AP |
1665 | int al, i; |
1666 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; | |
b9908bf9 MC |
1667 | unsigned long cert_list_len, cert_len; |
1668 | X509 *x = NULL; | |
b6981744 | 1669 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1670 | STACK_OF(X509) *sk = NULL; |
1671 | EVP_PKEY *pkey = NULL; | |
7f6b466b | 1672 | size_t chainidx, certidx; |
e96e0f8e | 1673 | unsigned int context = 0; |
7f6b466b | 1674 | const SSL_CERT_LOOKUP *clu; |
0f113f3e MC |
1675 | |
1676 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1677 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1678 | goto err; |
0f113f3e MC |
1679 | } |
1680 | ||
e96e0f8e MC |
1681 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1682 | || context != 0 | |
1683 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1684 | || PACKET_remaining(pkt) != cert_list_len |
1685 | || PACKET_remaining(pkt) == 0) { | |
0f113f3e | 1686 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1687 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1688 | goto f_err; |
1689 | } | |
d805a57b | 1690 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1691 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1692 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1693 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1694 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1695 | SSL_R_CERT_LENGTH_MISMATCH); |
1696 | goto f_err; | |
1697 | } | |
1698 | ||
df758a85 MC |
1699 | certstart = certbytes; |
1700 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1701 | if (x == NULL) { |
1702 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1703 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1704 | goto f_err; |
1705 | } | |
df758a85 | 1706 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1707 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1708 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1709 | SSL_R_CERT_LENGTH_MISMATCH); |
1710 | goto f_err; | |
1711 | } | |
e96e0f8e MC |
1712 | |
1713 | if (SSL_IS_TLS13(s)) { | |
1714 | RAW_EXTENSION *rawexts = NULL; | |
1715 | PACKET extensions; | |
1716 | ||
1717 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1718 | al = SSL_AD_DECODE_ERROR; | |
1719 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1720 | goto f_err; | |
1721 | } | |
fe874d27 MC |
1722 | if (!tls_collect_extensions(s, &extensions, |
1723 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
735d5b59 | 1724 | &al, NULL, chainidx == 0) |
8e1634ec TT |
1725 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
1726 | rawexts, x, chainidx, &al, | |
1727 | PACKET_remaining(pkt) == 0)) { | |
5ee289ea | 1728 | OPENSSL_free(rawexts); |
e96e0f8e | 1729 | goto f_err; |
5ee289ea MC |
1730 | } |
1731 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1732 | } |
1733 | ||
0f113f3e | 1734 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1735 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1736 | goto err; |
0f113f3e MC |
1737 | } |
1738 | x = NULL; | |
0f113f3e MC |
1739 | } |
1740 | ||
1741 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1742 | /* |
1743 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1744 | * for client side verification of the server certificate to take place. | |
1745 | * However, historically the code has only checked that *any* flag is set | |
1746 | * to cause server verification to take place. Use of the other flags makes | |
1747 | * no sense in client mode. An attempt to clean up the semantics was | |
1748 | * reverted because at least one application *only* set | |
1749 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1750 | * server verification to take place, after the clean up it silently did | |
1751 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1752 | * sent to them because they are void functions. Therefore, we now use the | |
1753 | * (less clean) historic behaviour of performing validation if any flag is | |
1754 | * set. The *documented* interface remains the same. | |
1755 | */ | |
1756 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1757 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1758 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1759 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1760 | goto f_err; | |
1761 | } | |
1762 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1763 | if (i > 1) { | |
b9908bf9 | 1764 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1765 | al = SSL_AD_HANDSHAKE_FAILURE; |
1766 | goto f_err; | |
1767 | } | |
1768 | ||
c34b0f99 | 1769 | s->session->peer_chain = sk; |
0f113f3e MC |
1770 | /* |
1771 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1772 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1773 | */ |
1774 | x = sk_X509_value(sk, 0); | |
1775 | sk = NULL; | |
0f113f3e | 1776 | |
8382fd3a | 1777 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1778 | |
55a9a16f | 1779 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1780 | x = NULL; |
f69fe73a | 1781 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1782 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1783 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1784 | goto f_err; | |
1785 | } | |
1786 | ||
7f6b466b | 1787 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
0f113f3e MC |
1788 | x = NULL; |
1789 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1790 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1791 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1792 | goto f_err; | |
1793 | } | |
05b8486e DSH |
1794 | /* |
1795 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1796 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1797 | * type. | |
1798 | */ | |
1799 | if (!SSL_IS_TLS13(s)) { | |
7f6b466b | 1800 | if ((clu->amask & s->s3->tmp.new_cipher->algorithm_auth) == 0) { |
05b8486e DSH |
1801 | x = NULL; |
1802 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1803 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1804 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1805 | goto f_err; | |
1806 | } | |
0f113f3e | 1807 | } |
7f6b466b | 1808 | s->session->peer_type = certidx; |
55a9a16f MC |
1809 | |
1810 | X509_free(s->session->peer); | |
05f0fb9f | 1811 | X509_up_ref(x); |
55a9a16f | 1812 | s->session->peer = x; |
0f113f3e | 1813 | s->session->verify_result = s->verify_result; |
0f113f3e | 1814 | x = NULL; |
2c5dfdc3 MC |
1815 | |
1816 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1817 | if (SSL_IS_TLS13(s) | |
1818 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1819 | sizeof(s->cert_verify_hash), | |
1820 | &s->cert_verify_hash_len)) { | |
1821 | al = SSL_AD_INTERNAL_ERROR; | |
1822 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1823 | goto f_err; | |
1824 | } | |
1825 | ||
b9908bf9 | 1826 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1827 | goto done; |
1828 | ||
0f113f3e | 1829 | f_err: |
66696478 | 1830 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1831 | err: |
fe3a3291 | 1832 | ossl_statem_set_error(s); |
66696478 | 1833 | done: |
0f113f3e MC |
1834 | X509_free(x); |
1835 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1836 | return ret; |
0f113f3e | 1837 | } |
d02b48c6 | 1838 | |
7dc1c647 | 1839 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1840 | { |
1841 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1842 | PACKET psk_identity_hint; |
02a74590 | 1843 | |
7dc1c647 MC |
1844 | /* PSK ciphersuites are preceded by an identity hint */ |
1845 | ||
1846 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1847 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1848 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1849 | return 0; |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * Store PSK identity hint for later use, hint is used in | |
1854 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1855 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1856 | * identity. | |
1857 | */ | |
1858 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1859 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1860 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1861 | return 0; |
1862 | } | |
02a74590 | 1863 | |
7dc1c647 MC |
1864 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1865 | OPENSSL_free(s->session->psk_identity_hint); | |
1866 | s->session->psk_identity_hint = NULL; | |
1867 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1868 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1869 | *al = SSL_AD_INTERNAL_ERROR; |
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | return 1; | |
1874 | #else | |
4fa88861 | 1875 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1876 | *al = SSL_AD_INTERNAL_ERROR; |
1877 | return 0; | |
02a74590 MC |
1878 | #endif |
1879 | } | |
1880 | ||
25c6c10c MC |
1881 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1882 | { | |
1883 | #ifndef OPENSSL_NO_SRP | |
1884 | PACKET prime, generator, salt, server_pub; | |
1885 | ||
1886 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1887 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1888 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1889 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1890 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1891 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1892 | return 0; |
1893 | } | |
1894 | ||
348240c6 | 1895 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1896 | if ((s->srp_ctx.N = |
1897 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1898 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1899 | || (s->srp_ctx.g = |
1900 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1901 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1902 | || (s->srp_ctx.s = |
1903 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1904 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1905 | || (s->srp_ctx.B = |
1906 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1907 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1908 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1909 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1910 | return 0; |
1911 | } | |
1912 | ||
1913 | if (!srp_verify_server_param(s, al)) { | |
4fa88861 | 1914 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1915 | return 0; |
1916 | } | |
1917 | ||
1918 | /* We must check if there is a certificate */ | |
a230b26e | 1919 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1920 | *pkey = X509_get0_pubkey(s->session->peer); |
1921 | ||
1922 | return 1; | |
1923 | #else | |
4fa88861 | 1924 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1925 | *al = SSL_AD_INTERNAL_ERROR; |
1926 | return 0; | |
1927 | #endif | |
1928 | } | |
1929 | ||
e01a610d MC |
1930 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1931 | { | |
1932 | #ifndef OPENSSL_NO_DH | |
1933 | PACKET prime, generator, pub_key; | |
1934 | EVP_PKEY *peer_tmp = NULL; | |
1935 | ||
1936 | DH *dh = NULL; | |
1937 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1938 | ||
26505153 RL |
1939 | int check_bits = 0; |
1940 | ||
e01a610d MC |
1941 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1942 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1943 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1944 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1945 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1946 | return 0; |
1947 | } | |
1948 | ||
1949 | peer_tmp = EVP_PKEY_new(); | |
1950 | dh = DH_new(); | |
1951 | ||
1952 | if (peer_tmp == NULL || dh == NULL) { | |
1953 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1954 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1955 | goto err; |
1956 | } | |
1957 | ||
348240c6 MC |
1958 | /* TODO(size_t): Convert these calls */ |
1959 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1960 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1961 | NULL); | |
1962 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1963 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1964 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1965 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1966 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1967 | goto err; |
1968 | } | |
1969 | ||
69687aa8 | 1970 | /* test non-zero pubkey */ |
26505153 | 1971 | if (BN_is_zero(bnpub_key)) { |
fb34a0f4 | 1972 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 1973 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1974 | goto err; |
1975 | } | |
1976 | ||
1977 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1978 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1979 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1980 | goto err; |
1981 | } | |
1982 | p = g = NULL; | |
1983 | ||
26505153 | 1984 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
fb34a0f4 | 1985 | *al = SSL_AD_ILLEGAL_PARAMETER; |
26505153 RL |
1986 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
1987 | goto err; | |
1988 | } | |
1989 | ||
e01a610d MC |
1990 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1991 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1992 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1993 | goto err; |
1994 | } | |
1995 | bnpub_key = NULL; | |
1996 | ||
1997 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1998 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1999 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
2000 | goto err; |
2001 | } | |
2002 | ||
2003 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
2004 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 2005 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
2006 | goto err; |
2007 | } | |
2008 | ||
2009 | s->s3->peer_tmp = peer_tmp; | |
2010 | ||
2011 | /* | |
2012 | * FIXME: This makes assumptions about which ciphersuites come with | |
2013 | * public keys. We should have a less ad-hoc way of doing this | |
2014 | */ | |
a230b26e | 2015 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2016 | *pkey = X509_get0_pubkey(s->session->peer); |
2017 | /* else anonymous DH, so no certificate or pkey. */ | |
2018 | ||
2019 | return 1; | |
2020 | ||
2021 | err: | |
2022 | BN_free(p); | |
2023 | BN_free(g); | |
2024 | BN_free(bnpub_key); | |
2025 | DH_free(dh); | |
2026 | EVP_PKEY_free(peer_tmp); | |
2027 | ||
2028 | return 0; | |
2029 | #else | |
4fa88861 | 2030 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
2031 | *al = SSL_AD_INTERNAL_ERROR; |
2032 | return 0; | |
2033 | #endif | |
2034 | } | |
2035 | ||
ff74aeb1 MC |
2036 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
2037 | { | |
2038 | #ifndef OPENSSL_NO_EC | |
2039 | PACKET encoded_pt; | |
2040 | const unsigned char *ecparams; | |
ff74aeb1 MC |
2041 | |
2042 | /* | |
2043 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
2044 | * public key. For now we only support named (not generic) curves and | |
2045 | * ECParameters in this case is just three bytes. | |
2046 | */ | |
2047 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
2048 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2049 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2050 | return 0; |
2051 | } | |
2052 | /* | |
2053 | * Check curve is one of our preferences, if not server has sent an | |
2054 | * invalid curve. ECParameters is 3 bytes. | |
2055 | */ | |
2056 | if (!tls1_check_curve(s, ecparams, 3)) { | |
fb34a0f4 | 2057 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 2058 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2059 | return 0; |
2060 | } | |
2061 | ||
612f9d22 | 2062 | if ((s->s3->peer_tmp = ssl_generate_param_group(ecparams[2])) == NULL) { |
ff74aeb1 | 2063 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 2064 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
2065 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
2066 | return 0; | |
2067 | } | |
2068 | ||
ff74aeb1 MC |
2069 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
2070 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2071 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2072 | return 0; |
2073 | } | |
2074 | ||
ec24630a DSH |
2075 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2076 | PACKET_data(&encoded_pt), | |
2077 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 2078 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 2079 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2080 | return 0; |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2085 | * ECParameters in the server key exchange message. We do support RSA | |
2086 | * and ECDSA. | |
2087 | */ | |
2088 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2089 | *pkey = X509_get0_pubkey(s->session->peer); | |
2090 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2091 | *pkey = X509_get0_pubkey(s->session->peer); | |
2092 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2093 | ||
2094 | return 1; | |
2095 | #else | |
4fa88861 | 2096 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2097 | *al = SSL_AD_INTERNAL_ERROR; |
2098 | return 0; | |
2099 | #endif | |
2100 | } | |
2101 | ||
be3583fa | 2102 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2103 | { |
5554facb | 2104 | int al = -1; |
e1e588ac | 2105 | long alg_k; |
b9908bf9 | 2106 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2107 | EVP_MD_CTX *md_ctx = NULL; |
2108 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2109 | PACKET save_param_start, signature; |
b9908bf9 | 2110 | |
b9908bf9 MC |
2111 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2112 | ||
73999b62 | 2113 | save_param_start = *pkt; |
8d92c1f8 | 2114 | |
3260adf1 | 2115 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2116 | EVP_PKEY_free(s->s3->peer_tmp); |
2117 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2118 | #endif |
d02b48c6 | 2119 | |
7689082b | 2120 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2121 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2122 | goto err; | |
7689082b DSH |
2123 | } |
2124 | ||
2125 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2126 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2127 | } else if (alg_k & SSL_kSRP) { |
2128 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2129 | goto err; |
e01a610d MC |
2130 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2131 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2132 | goto err; | |
ff74aeb1 MC |
2133 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2134 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2135 | goto err; | |
0f113f3e MC |
2136 | } else if (alg_k) { |
2137 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2138 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2139 | goto err; |
0f113f3e | 2140 | } |
0f113f3e | 2141 | |
0f113f3e MC |
2142 | /* if it was signed, check the signature */ |
2143 | if (pkey != NULL) { | |
32942870 | 2144 | PACKET params; |
be8dba2c MC |
2145 | int maxsig; |
2146 | const EVP_MD *md = NULL; | |
72ceb6a6 DSH |
2147 | unsigned char *tbs; |
2148 | size_t tbslen; | |
2149 | int rv; | |
e1e588ac | 2150 | |
32942870 EK |
2151 | /* |
2152 | * |pkt| now points to the beginning of the signature, so the difference | |
2153 | * equals the length of the parameters. | |
2154 | */ | |
2155 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2156 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2157 | PACKET_remaining(pkt))) { |
fb34a0f4 | 2158 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2159 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2160 | goto err; |
32942870 EK |
2161 | } |
2162 | ||
0f113f3e | 2163 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2164 | unsigned int sigalg; |
703bcee0 MC |
2165 | |
2166 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2167 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2168 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2169 | goto err; |
0f113f3e | 2170 | } |
5554facb | 2171 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2172 | if (rv == -1) { |
2173 | al = SSL_AD_INTERNAL_ERROR; | |
2174 | goto err; | |
2175 | } else if (rv == 0) { | |
2176 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2177 | goto err; |
0f113f3e | 2178 | } |
a2f9200f | 2179 | #ifdef SSL_DEBUG |
0f113f3e MC |
2180 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2181 | #endif | |
f365a3e2 DSH |
2182 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2183 | al = SSL_AD_INTERNAL_ERROR; | |
2184 | goto err; | |
32942870 | 2185 | } |
0f113f3e | 2186 | |
b2021556 DSH |
2187 | if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) { |
2188 | al = SSL_AD_INTERNAL_ERROR; | |
2189 | goto err; | |
2190 | } | |
f365a3e2 | 2191 | |
73999b62 MC |
2192 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2193 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2194 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2195 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2196 | goto err; |
0f113f3e | 2197 | } |
be8dba2c MC |
2198 | maxsig = EVP_PKEY_size(pkey); |
2199 | if (maxsig < 0) { | |
e1e588ac | 2200 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2201 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2202 | goto err; |
8098fc56 | 2203 | } |
0f113f3e MC |
2204 | |
2205 | /* | |
8098fc56 | 2206 | * Check signature length |
0f113f3e | 2207 | */ |
be8dba2c | 2208 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2209 | /* wrong packet length */ |
e1e588ac | 2210 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2211 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2212 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2213 | goto err; |
2214 | } | |
2215 | ||
2216 | md_ctx = EVP_MD_CTX_new(); | |
2217 | if (md_ctx == NULL) { | |
2218 | al = SSL_AD_INTERNAL_ERROR; | |
2219 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2220 | goto err; | |
0f113f3e | 2221 | } |
e1e588ac | 2222 | |
fe3066ee MC |
2223 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2224 | al = SSL_AD_INTERNAL_ERROR; | |
2225 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2226 | goto err; | |
2227 | } | |
5554facb | 2228 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2229 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2230 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2231 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2232 | al = SSL_AD_INTERNAL_ERROR; |
2233 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2234 | goto err; | |
2235 | } | |
2236 | } | |
72ceb6a6 DSH |
2237 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2238 | PACKET_remaining(¶ms)); | |
2239 | if (tbslen == 0) { | |
192e4bbb | 2240 | al = SSL_AD_INTERNAL_ERROR; |
72ceb6a6 | 2241 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
e1e588ac | 2242 | goto err; |
192e4bbb | 2243 | } |
72ceb6a6 DSH |
2244 | |
2245 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2246 | PACKET_remaining(&signature), tbs, tbslen); | |
2247 | OPENSSL_free(tbs); | |
cfba0675 | 2248 | if (rv <= 0) { |
192e4bbb DSH |
2249 | al = SSL_AD_DECRYPT_ERROR; |
2250 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2251 | goto err; |
0f113f3e | 2252 | } |
e1e588ac | 2253 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2254 | md_ctx = NULL; |
0f113f3e | 2255 | } else { |
7689082b | 2256 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2257 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2258 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2259 | /* Might be wrong key type, check it */ |
e1e588ac | 2260 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2261 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2262 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2263 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2264 | } else { |
2265 | al = SSL_AD_DECODE_ERROR; | |
2266 | } | |
0f113f3e MC |
2267 | goto err; |
2268 | } | |
2269 | /* still data left over */ | |
73999b62 | 2270 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2271 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2272 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2273 | goto err; |
0f113f3e MC |
2274 | } |
2275 | } | |
e1e588ac | 2276 | |
b9908bf9 | 2277 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2278 | err: |
7dc1c647 MC |
2279 | if (al != -1) |
2280 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2281 | ossl_statem_set_error(s); |
fe3066ee | 2282 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2283 | return MSG_PROCESS_ERROR; |
0f113f3e | 2284 | } |
d02b48c6 | 2285 | |
be3583fa | 2286 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 | 2287 | { |
eb5fd03b | 2288 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
32f66107 DSH |
2289 | int al = SSL_AD_DECODE_ERROR; |
2290 | size_t i; | |
2291 | ||
2292 | /* Clear certificate validity flags */ | |
2293 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2294 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2295 | |
03f44b97 | 2296 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2297 | PACKET reqctx, extensions; |
2298 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2299 | |
2300 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2301 | OPENSSL_free(s->s3->tmp.ctype); | |
2302 | s->s3->tmp.ctype = NULL; | |
2303 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2304 | |
03f44b97 DSH |
2305 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2306 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2307 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2308 | SSL_R_LENGTH_MISMATCH); | |
2309 | goto err; | |
2310 | } | |
32f66107 DSH |
2311 | |
2312 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
45615c5f | 2313 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_BAD_LENGTH); |
32f66107 DSH |
2314 | goto err; |
2315 | } | |
2316 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2317 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
735d5b59 | 2318 | &rawexts, &al, NULL, 1) |
fe874d27 | 2319 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
735d5b59 | 2320 | rawexts, NULL, 0, &al, 1)) { |
32f66107 DSH |
2321 | OPENSSL_free(rawexts); |
2322 | goto err; | |
2323 | } | |
2324 | OPENSSL_free(rawexts); | |
2325 | if (!tls1_process_sigalgs(s)) { | |
2326 | al = SSL_AD_INTERNAL_ERROR; | |
2327 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2328 | goto err; | |
2329 | } | |
03f44b97 DSH |
2330 | } else { |
2331 | PACKET ctypes; | |
75c13e78 | 2332 | |
03f44b97 DSH |
2333 | /* get the certificate types */ |
2334 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
03f44b97 DSH |
2335 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2336 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2337 | goto err; |
03f44b97 DSH |
2338 | } |
2339 | ||
2340 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
32f66107 | 2341 | al = SSL_AD_INTERNAL_ERROR; |
03f44b97 DSH |
2342 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); |
2343 | goto err; | |
2344 | } | |
ac112332 | 2345 | |
32f66107 DSH |
2346 | if (SSL_USE_SIGALGS(s)) { |
2347 | PACKET sigalgs; | |
703bcee0 | 2348 | |
32f66107 DSH |
2349 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
2350 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2351 | SSL_R_LENGTH_MISMATCH); | |
2352 | goto err; | |
2353 | } | |
ac112332 | 2354 | |
32f66107 DSH |
2355 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
2356 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2357 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2358 | goto err; | |
2359 | } | |
2360 | if (!tls1_process_sigalgs(s)) { | |
2361 | al = SSL_AD_INTERNAL_ERROR; | |
2362 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2363 | ERR_R_MALLOC_FAILURE); | |
2364 | goto err; | |
2365 | } | |
0f113f3e | 2366 | } |
0f113f3e | 2367 | |
32f66107 DSH |
2368 | /* get the CA RDNs */ |
2369 | if (!parse_ca_names(s, pkt, &al)) | |
03f44b97 | 2370 | goto err; |
03f44b97 DSH |
2371 | } |
2372 | ||
2373 | if (PACKET_remaining(pkt) != 0) { | |
03f44b97 DSH |
2374 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
2375 | goto err; | |
2376 | } | |
0f113f3e | 2377 | |
0f113f3e MC |
2378 | /* we should setup a certificate to return.... */ |
2379 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2380 | |
05c4f1d5 | 2381 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2382 | goto done; |
0f113f3e | 2383 | err: |
32f66107 | 2384 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
fe3a3291 | 2385 | ossl_statem_set_error(s); |
cc273a93 | 2386 | done: |
b9908bf9 | 2387 | return ret; |
0f113f3e MC |
2388 | } |
2389 | ||
be3583fa | 2390 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2391 | { |
6df55cac | 2392 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2393 | unsigned int ticklen; |
9ac6244b | 2394 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2395 | unsigned int sess_len; |
de1df7e9 | 2396 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2397 | PACKET nonce; |
b9908bf9 | 2398 | |
73999b62 | 2399 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2400 | || (SSL_IS_TLS13(s) |
2401 | && (!PACKET_get_net_4(pkt, &age_add) | |
2402 | || !PACKET_get_length_prefixed_1(pkt, &nonce) | |
9b6a8254 MC |
2403 | || !PACKET_memdup(&nonce, &s->session->ext.tick_nonce, |
2404 | &s->session->ext.tick_nonce_len))) | |
a230b26e | 2405 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2406 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2407 | || (SSL_IS_TLS13(s) |
2408 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2409 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2410 | goto f_err; |
2411 | } | |
2412 | ||
de1df7e9 MC |
2413 | /* |
2414 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2415 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2416 | * be 0 here in that instance | |
2417 | */ | |
e711da71 | 2418 | if (ticklen == 0) |
c9de4a20 | 2419 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2420 | |
150840b9 MC |
2421 | /* |
2422 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2423 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2424 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2425 | * time a NewSessionTicket arrives because those messages arrive | |
2426 | * post-handshake and the session may have already gone into the session | |
2427 | * cache. | |
2428 | */ | |
2429 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee MC |
2430 | int i = s->session_ctx->session_cache_mode; |
2431 | SSL_SESSION *new_sess; | |
2432 | /* | |
2433 | * We reused an existing session, so we need to replace it with a new | |
2434 | * one | |
2435 | */ | |
5d61491c MC |
2436 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
2437 | al = SSL_AD_INTERNAL_ERROR; | |
2438 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); | |
2439 | goto f_err; | |
2440 | } | |
2441 | ||
98ece4ee MC |
2442 | if (i & SSL_SESS_CACHE_CLIENT) { |
2443 | /* | |
e4612d02 | 2444 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2445 | */ |
e4612d02 | 2446 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2447 | } |
2448 | ||
98ece4ee MC |
2449 | SSL_SESSION_free(s->session); |
2450 | s->session = new_sess; | |
2451 | } | |
2452 | ||
fc24f0bf MC |
2453 | /* |
2454 | * Technically the cast to long here is not guaranteed by the C standard - | |
2455 | * but we use it elsewhere, so this should be ok. | |
2456 | */ | |
2457 | s->session->time = (long)time(NULL); | |
2458 | ||
aff8c126 RS |
2459 | OPENSSL_free(s->session->ext.tick); |
2460 | s->session->ext.tick = NULL; | |
2461 | s->session->ext.ticklen = 0; | |
e711da71 | 2462 | |
aff8c126 RS |
2463 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2464 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2465 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2466 | goto err; |
2467 | } | |
aff8c126 | 2468 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2469 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2470 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2471 | goto f_err; |
2472 | } | |
e711da71 | 2473 | |
aff8c126 | 2474 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2475 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2476 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2477 | |
2478 | if (SSL_IS_TLS13(s)) { | |
2479 | PACKET extpkt; | |
2480 | ||
2481 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
26b9172a | 2482 | || PACKET_remaining(pkt) != 0 |
de1df7e9 | 2483 | || !tls_collect_extensions(s, &extpkt, |
fe874d27 | 2484 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
735d5b59 | 2485 | &exts, &al, NULL, 1) |
fe874d27 MC |
2486 | || !tls_parse_all_extensions(s, |
2487 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
735d5b59 | 2488 | exts, NULL, 0, &al, 1)) { |
de1df7e9 MC |
2489 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); |
2490 | goto f_err; | |
2491 | } | |
2492 | } | |
2493 | ||
0f113f3e MC |
2494 | /* |
2495 | * There are two ways to detect a resumed ticket session. One is to set | |
2496 | * an appropriate session ID and then the server must return a match in | |
2497 | * ServerHello. This allows the normal client session ID matching to work | |
2498 | * and we know much earlier that the ticket has been accepted. The | |
2499 | * other way is to set zero length session ID when the ticket is | |
2500 | * presented and rely on the handshake to determine session resumption. | |
2501 | * We choose the former approach because this fits in with assumptions | |
2502 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2503 | * SHA256 is disabled) hash of the ticket. | |
2504 | */ | |
ec60ccc1 MC |
2505 | /* |
2506 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2507 | * but s->session->session_id_length is a size_t | |
2508 | */ | |
aff8c126 | 2509 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2510 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2511 | EVP_sha256(), NULL)) { |
2512 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2513 | goto err; | |
2514 | } | |
ec60ccc1 | 2515 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2516 | |
2517 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2518 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2519 | OPENSSL_free(exts); |
de1df7e9 MC |
2520 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2521 | return MSG_PROCESS_FINISHED_READING; | |
2522 | } | |
2523 | ||
b9908bf9 | 2524 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2525 | f_err: |
2526 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2527 | err: | |
fe3a3291 | 2528 | ossl_statem_set_error(s); |
33d93417 | 2529 | OPENSSL_free(exts); |
b9908bf9 | 2530 | return MSG_PROCESS_ERROR; |
0f113f3e | 2531 | } |
67c8e7f4 | 2532 | |
f63e4288 MC |
2533 | /* |
2534 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2535 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2536 | * |*al| is populated with a suitable alert code. | |
2537 | */ | |
2538 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2539 | { |
8b0e934a | 2540 | size_t resplen; |
b9908bf9 | 2541 | unsigned int type; |
b9908bf9 | 2542 | |
73999b62 | 2543 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2544 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2545 | *al = SSL_AD_DECODE_ERROR; |
2546 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2547 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2548 | return 0; | |
0f113f3e | 2549 | } |
56a26ce3 MC |
2550 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2551 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2552 | *al = SSL_AD_DECODE_ERROR; |
2553 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2554 | return 0; | |
0f113f3e | 2555 | } |
8cbfcc70 RS |
2556 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2557 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2558 | *al = SSL_AD_INTERNAL_ERROR; |
2559 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2560 | return 0; | |
0f113f3e | 2561 | } |
8cbfcc70 | 2562 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2563 | *al = SSL_AD_DECODE_ERROR; |
2564 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2565 | return 0; | |
ac63710a | 2566 | } |
8cbfcc70 | 2567 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2568 | |
2569 | return 1; | |
2570 | } | |
2faa1b48 | 2571 | |
f63e4288 MC |
2572 | |
2573 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2574 | { | |
2575 | int al; | |
2576 | ||
2577 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2578 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2579 | ossl_statem_set_error(s); | |
2580 | return MSG_PROCESS_ERROR; | |
2581 | } | |
2582 | ||
b9908bf9 | 2583 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2584 | } |
d02b48c6 | 2585 | |
7776a36c MC |
2586 | /* |
2587 | * Perform miscellaneous checks and processing after we have received the | |
2588 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2589 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2590 | * on failure. | |
7776a36c MC |
2591 | */ |
2592 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2593 | { |
a455d0f6 MC |
2594 | /* |
2595 | * at this point we check that we have the required stuff from | |
2596 | * the server | |
2597 | */ | |
2598 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2599 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2600 | return 0; | |
a455d0f6 MC |
2601 | } |
2602 | ||
bb1aaab4 | 2603 | /* |
aff8c126 RS |
2604 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2605 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2606 | * message, or NULL and -1 otherwise |
2607 | */ | |
aff8c126 RS |
2608 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2609 | && s->ctx->ext.status_cb != NULL) { | |
2610 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2611 | ||
bb1aaab4 | 2612 | if (ret == 0) { |
7776a36c MC |
2613 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2614 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2615 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2616 | return 0; |
bb1aaab4 MC |
2617 | } |
2618 | if (ret < 0) { | |
7776a36c MC |
2619 | *al = SSL_AD_INTERNAL_ERROR; |
2620 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2621 | ERR_R_MALLOC_FAILURE); | |
2622 | return 0; | |
bb1aaab4 MC |
2623 | } |
2624 | } | |
ed29e82a RP |
2625 | #ifndef OPENSSL_NO_CT |
2626 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2627 | /* Note we validate the SCTs whether or not we abort on error */ |
2628 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2629 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2630 | return 0; | |
ed29e82a RP |
2631 | } |
2632 | } | |
2633 | #endif | |
2634 | ||
7776a36c MC |
2635 | return 1; |
2636 | } | |
2637 | ||
2638 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2639 | { | |
2640 | int al = SSL_AD_INTERNAL_ERROR; | |
2641 | ||
2642 | if (PACKET_remaining(pkt) > 0) { | |
2643 | /* should contain no data */ | |
2644 | al = SSL_AD_DECODE_ERROR; | |
2645 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2646 | goto err; | |
2647 | } | |
2648 | #ifndef OPENSSL_NO_SRP | |
2649 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2650 | if (SRP_Calc_A_param(s) <= 0) { | |
2651 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2652 | goto err; | |
2653 | } | |
2654 | } | |
2655 | #endif | |
2656 | ||
2657 | /* | |
2658 | * Error queue messages are generated directly by this function | |
2659 | */ | |
2660 | if (!tls_process_initial_server_flight(s, &al)) | |
2661 | goto err; | |
2662 | ||
bd79bcb4 | 2663 | return MSG_PROCESS_FINISHED_READING; |
7776a36c MC |
2664 | |
2665 | err: | |
2666 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2667 | ossl_statem_set_error(s); | |
2668 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2669 | } |
176f31dd | 2670 | |
f1ec23c0 | 2671 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2672 | { |
7689082b | 2673 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2674 | int ret = 0; |
2675 | /* | |
2676 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2677 | * \0-terminated identity. The last byte is for us for simulating | |
2678 | * strnlen. | |
2679 | */ | |
2680 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2681 | size_t identitylen = 0; | |
2682 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2683 | unsigned char *tmppsk = NULL; | |
2684 | char *tmpidentity = NULL; | |
2685 | size_t psklen = 0; | |
2686 | ||
2687 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2688 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2689 | *al = SSL_AD_INTERNAL_ERROR; |
2690 | goto err; | |
2691 | } | |
d02b48c6 | 2692 | |
13c0ec4a | 2693 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2694 | |
13c0ec4a MC |
2695 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2696 | identity, sizeof(identity) - 1, | |
2697 | psk, sizeof(psk)); | |
7689082b | 2698 | |
13c0ec4a | 2699 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2700 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2701 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2702 | goto err; | |
2703 | } else if (psklen == 0) { | |
05ec6a25 | 2704 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2705 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2706 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2707 | goto err; | |
2708 | } | |
7689082b | 2709 | |
13c0ec4a MC |
2710 | identitylen = strlen(identity); |
2711 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2712 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
fb34a0f4 | 2713 | *al = SSL_AD_INTERNAL_ERROR; |
13c0ec4a MC |
2714 | goto err; |
2715 | } | |
7689082b | 2716 | |
13c0ec4a MC |
2717 | tmppsk = OPENSSL_memdup(psk, psklen); |
2718 | tmpidentity = OPENSSL_strdup(identity); | |
2719 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2720 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2721 | *al = SSL_AD_INTERNAL_ERROR; |
2722 | goto err; | |
2723 | } | |
7689082b | 2724 | |
13c0ec4a MC |
2725 | OPENSSL_free(s->s3->tmp.psk); |
2726 | s->s3->tmp.psk = tmppsk; | |
2727 | s->s3->tmp.psklen = psklen; | |
2728 | tmppsk = NULL; | |
2729 | OPENSSL_free(s->session->psk_identity); | |
2730 | s->session->psk_identity = tmpidentity; | |
2731 | tmpidentity = NULL; | |
f1ec23c0 | 2732 | |
b2b3024e | 2733 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2734 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2735 | *al = SSL_AD_INTERNAL_ERROR; | |
2736 | goto err; | |
2737 | } | |
7689082b | 2738 | |
13c0ec4a | 2739 | ret = 1; |
0bce0b02 | 2740 | |
13c0ec4a MC |
2741 | err: |
2742 | OPENSSL_cleanse(psk, psklen); | |
2743 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2744 | OPENSSL_clear_free(tmppsk, psklen); | |
2745 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2746 | |
13c0ec4a MC |
2747 | return ret; |
2748 | #else | |
05ec6a25 | 2749 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2750 | *al = SSL_AD_INTERNAL_ERROR; |
2751 | return 0; | |
b9908bf9 | 2752 | #endif |
13c0ec4a | 2753 | } |
b9908bf9 | 2754 | |
f1ec23c0 | 2755 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2756 | { |
bc36ee62 | 2757 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2758 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2759 | EVP_PKEY *pkey = NULL; |
2760 | EVP_PKEY_CTX *pctx = NULL; | |
2761 | size_t enclen; | |
2762 | unsigned char *pms = NULL; | |
2763 | size_t pmslen = 0; | |
b9908bf9 | 2764 | |
13c0ec4a MC |
2765 | if (s->session->peer == NULL) { |
2766 | /* | |
2767 | * We should always have a server certificate with SSL_kRSA. | |
2768 | */ | |
05ec6a25 | 2769 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2770 | return 0; |
2771 | } | |
0f113f3e | 2772 | |
13c0ec4a MC |
2773 | pkey = X509_get0_pubkey(s->session->peer); |
2774 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2775 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2776 | return 0; |
2777 | } | |
0f113f3e | 2778 | |
13c0ec4a MC |
2779 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2780 | pms = OPENSSL_malloc(pmslen); | |
2781 | if (pms == NULL) { | |
05ec6a25 | 2782 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2783 | *al = SSL_AD_INTERNAL_ERROR; |
2784 | return 0; | |
2785 | } | |
0bce0b02 | 2786 | |
13c0ec4a MC |
2787 | pms[0] = s->client_version >> 8; |
2788 | pms[1] = s->client_version & 0xff; | |
348240c6 | 2789 | /* TODO(size_t): Convert this function */ |
ae3947de | 2790 | if (ssl_randbytes(s, pms + 2, (int)(pmslen - 2)) <= 0) { |
13c0ec4a MC |
2791 | goto err; |
2792 | } | |
0f113f3e | 2793 | |
13c0ec4a | 2794 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2795 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2796 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2797 | goto err; | |
2798 | } | |
13c0ec4a MC |
2799 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2800 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2801 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2802 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2803 | goto err; |
2804 | } | |
f1ec23c0 MC |
2805 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2806 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2807 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2808 | goto err; |
2809 | } | |
13c0ec4a MC |
2810 | EVP_PKEY_CTX_free(pctx); |
2811 | pctx = NULL; | |
0f113f3e | 2812 | |
13c0ec4a | 2813 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2814 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2815 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2816 | goto err; | |
b9908bf9 | 2817 | } |
13c0ec4a | 2818 | |
2faa1b48 CB |
2819 | /* Log the premaster secret, if logging is enabled. */ |
2820 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2821 | goto err; | |
2822 | ||
26fb4b03 RS |
2823 | s->s3->tmp.pms = pms; |
2824 | s->s3->tmp.pmslen = pmslen; | |
2825 | ||
13c0ec4a MC |
2826 | return 1; |
2827 | err: | |
2828 | OPENSSL_clear_free(pms, pmslen); | |
2829 | EVP_PKEY_CTX_free(pctx); | |
2830 | ||
2831 | return 0; | |
2832 | #else | |
05ec6a25 | 2833 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2834 | *al = SSL_AD_INTERNAL_ERROR; |
2835 | return 0; | |
f9b3bff6 | 2836 | #endif |
13c0ec4a MC |
2837 | } |
2838 | ||
f1ec23c0 | 2839 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2840 | { |
2841 | #ifndef OPENSSL_NO_DH | |
2842 | DH *dh_clnt = NULL; | |
2843 | const BIGNUM *pub_key; | |
2844 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2845 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2846 | |
2847 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2848 | if (skey == NULL) |
2849 | goto err; | |
2850 | ||
0a699a07 | 2851 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2852 | if (ckey == NULL) |
2853 | goto err; | |
2854 | ||
a8c1c704 MC |
2855 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2856 | ||
0f1e51ea | 2857 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2858 | goto err; |
a8c1c704 MC |
2859 | |
2860 | /* send off the data */ | |
2861 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2862 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2863 | goto err; |
2864 | ||
2865 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2866 | EVP_PKEY_free(ckey); |
2867 | ||
2868 | return 1; | |
f1ec23c0 MC |
2869 | err: |
2870 | EVP_PKEY_free(ckey); | |
2871 | #endif | |
05ec6a25 | 2872 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2873 | *al = SSL_AD_INTERNAL_ERROR; |
2874 | return 0; | |
a8c1c704 MC |
2875 | } |
2876 | ||
f1ec23c0 | 2877 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2878 | { |
2879 | #ifndef OPENSSL_NO_EC | |
2880 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2881 | size_t encoded_pt_len = 0; |
67ad5aab | 2882 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2883 | int ret = 0; |
67ad5aab MC |
2884 | |
2885 | skey = s->s3->peer_tmp; | |
ec24630a | 2886 | if (skey == NULL) { |
05ec6a25 | 2887 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2888 | return 0; |
2889 | } | |
2890 | ||
0a699a07 | 2891 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2892 | if (ckey == NULL) { |
2893 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2894 | goto err; | |
2895 | } | |
67ad5aab | 2896 | |
0f1e51ea | 2897 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2898 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2899 | goto err; |
2900 | } | |
2901 | ||
2902 | /* Generate encoding of client key */ | |
ec24630a | 2903 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2904 | |
2905 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2906 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2907 | goto err; |
2908 | } | |
2909 | ||
b2b3024e | 2910 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2911 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2912 | goto err; | |
2913 | } | |
67ad5aab | 2914 | |
f1ec23c0 | 2915 | ret = 1; |
67ad5aab | 2916 | err: |
f1ec23c0 | 2917 | OPENSSL_free(encodedPoint); |
67ad5aab | 2918 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2919 | return ret; |
67ad5aab | 2920 | #else |
05ec6a25 | 2921 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2922 | *al = SSL_AD_INTERNAL_ERROR; |
2923 | return 0; | |
2924 | #endif | |
2925 | } | |
2926 | ||
f1ec23c0 | 2927 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2928 | { |
2929 | #ifndef OPENSSL_NO_GOST | |
2930 | /* GOST key exchange message creation */ | |
2931 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2932 | X509 *peer_cert; | |
2933 | size_t msglen; | |
2934 | unsigned int md_len; | |
2935 | unsigned char shared_ukm[32], tmp[256]; | |
2936 | EVP_MD_CTX *ukm_hash = NULL; | |
2937 | int dgst_nid = NID_id_GostR3411_94; | |
2938 | unsigned char *pms = NULL; | |
2939 | size_t pmslen = 0; | |
2940 | ||
2941 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2942 | dgst_nid = NID_id_GostR3411_2012_256; | |
2943 | ||
2944 | /* | |
1ee4b98e | 2945 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
2946 | */ |
2947 | peer_cert = s->session->peer; | |
2948 | if (!peer_cert) { | |
2949 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2950 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2951 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2952 | return 0; | |
2953 | } | |
2954 | ||
2955 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2956 | if (pkey_ctx == NULL) { | |
2957 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2958 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2959 | return 0; |
2960 | } | |
2961 | /* | |
2962 | * If we have send a certificate, and certificate key | |
2963 | * parameters match those of server certificate, use | |
2964 | * certificate key for key exchange | |
2965 | */ | |
2966 | ||
2967 | /* Otherwise, generate ephemeral key pair */ | |
2968 | pmslen = 32; | |
2969 | pms = OPENSSL_malloc(pmslen); | |
2970 | if (pms == NULL) { | |
2971 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2972 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 2973 | goto err; |
e00e0b3d MC |
2974 | } |
2975 | ||
2976 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
2977 | /* Generate session key |
2978 | * TODO(size_t): Convert this function | |
2979 | */ | |
ae3947de | 2980 | || ssl_randbytes(s, pms, (int)pmslen) <= 0) { |
e00e0b3d | 2981 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2982 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2983 | goto err; |
2984 | }; | |
e00e0b3d MC |
2985 | /* |
2986 | * Compute shared IV and store it in algorithm-specific context | |
2987 | * data | |
2988 | */ | |
2989 | ukm_hash = EVP_MD_CTX_new(); | |
2990 | if (ukm_hash == NULL | |
a230b26e EK |
2991 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
2992 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2993 | SSL3_RANDOM_SIZE) <= 0 | |
2994 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2995 | SSL3_RANDOM_SIZE) <= 0 | |
2996 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 2997 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 2998 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
2999 | goto err; |
3000 | } | |
3001 | EVP_MD_CTX_free(ukm_hash); | |
3002 | ukm_hash = NULL; | |
3003 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3004 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
3005 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3006 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3007 | goto err; |
3008 | } | |
3009 | /* Make GOST keytransport blob message */ | |
3010 | /* | |
3011 | * Encapsulate it into sequence | |
3012 | */ | |
e00e0b3d MC |
3013 | msglen = 255; |
3014 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
3015 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3016 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3017 | goto err; |
3018 | } | |
f1ec23c0 | 3019 | |
08029dfa MC |
3020 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3021 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3022 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3023 | *al = SSL_AD_INTERNAL_ERROR; |
3024 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3025 | goto err; | |
e00e0b3d | 3026 | } |
f1ec23c0 | 3027 | |
e00e0b3d MC |
3028 | EVP_PKEY_CTX_free(pkey_ctx); |
3029 | s->s3->tmp.pms = pms; | |
3030 | s->s3->tmp.pmslen = pmslen; | |
3031 | ||
3032 | return 1; | |
3033 | err: | |
3034 | EVP_PKEY_CTX_free(pkey_ctx); | |
3035 | OPENSSL_clear_free(pms, pmslen); | |
3036 | EVP_MD_CTX_free(ukm_hash); | |
3037 | return 0; | |
3038 | #else | |
05ec6a25 | 3039 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3040 | *al = SSL_AD_INTERNAL_ERROR; |
3041 | return 0; | |
3042 | #endif | |
3043 | } | |
3044 | ||
f1ec23c0 | 3045 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3046 | { |
8b9546c7 | 3047 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3048 | unsigned char *abytes = NULL; |
3049 | ||
3050 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3051 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3052 | &abytes)) { | |
05ec6a25 | 3053 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3054 | return 0; |
3055 | } | |
f1ec23c0 MC |
3056 | BN_bn2bin(s->srp_ctx.A, abytes); |
3057 | ||
840a2bf8 MC |
3058 | OPENSSL_free(s->session->srp_username); |
3059 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3060 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3061 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3062 | return 0; |
3063 | } | |
3064 | ||
3065 | return 1; | |
3066 | #else | |
05ec6a25 | 3067 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3068 | *al = SSL_AD_INTERNAL_ERROR; |
3069 | return 0; | |
3070 | #endif | |
3071 | } | |
3072 | ||
7cea05dc | 3073 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3074 | { |
13c0ec4a MC |
3075 | unsigned long alg_k; |
3076 | int al = -1; | |
3077 | ||
f1ec23c0 | 3078 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3079 | |
13c0ec4a | 3080 | if ((alg_k & SSL_PSK) |
7cea05dc | 3081 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3082 | goto err; |
3083 | ||
f1ec23c0 | 3084 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3085 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3086 | goto err; |
a8c1c704 | 3087 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3088 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3089 | goto err; |
67ad5aab | 3090 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3091 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3092 | goto err; |
e00e0b3d | 3093 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3094 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3095 | goto err; |
840a2bf8 | 3096 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3097 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3098 | goto err; |
4a424545 | 3099 | } else if (!(alg_k & SSL_kPSK)) { |
fb34a0f4 | 3100 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 MC |
3101 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
3102 | goto err; | |
3103 | } | |
3104 | ||
b9908bf9 | 3105 | return 1; |
0f113f3e | 3106 | err: |
13c0ec4a MC |
3107 | if (al != -1) |
3108 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3109 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3110 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3111 | #ifndef OPENSSL_NO_PSK |
3112 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3113 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3114 | #endif |
b9908bf9 MC |
3115 | return 0; |
3116 | } | |
3117 | ||
3118 | int tls_client_key_exchange_post_work(SSL *s) | |
3119 | { | |
3120 | unsigned char *pms = NULL; | |
3121 | size_t pmslen = 0; | |
3122 | ||
6f137370 MC |
3123 | pms = s->s3->tmp.pms; |
3124 | pmslen = s->s3->tmp.pmslen; | |
3125 | ||
b9908bf9 MC |
3126 | #ifndef OPENSSL_NO_SRP |
3127 | /* Check for SRP */ | |
3128 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3129 | if (!srp_generate_client_master_secret(s)) { | |
3130 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3131 | ERR_R_INTERNAL_ERROR); | |
3132 | goto err; | |
3133 | } | |
3134 | return 1; | |
3135 | } | |
3136 | #endif | |
b9908bf9 MC |
3137 | |
3138 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3139 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3140 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3141 | goto err; | |
3142 | } | |
3143 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3144 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3145 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3146 | /* ssl_generate_master_secret frees the pms even on error */ |
3147 | pms = NULL; | |
3148 | pmslen = 0; | |
b9908bf9 MC |
3149 | goto err; |
3150 | } | |
6f137370 MC |
3151 | pms = NULL; |
3152 | pmslen = 0; | |
473483d4 MC |
3153 | |
3154 | #ifndef OPENSSL_NO_SCTP | |
3155 | if (SSL_IS_DTLS(s)) { | |
3156 | unsigned char sctpauthkey[64]; | |
3157 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3158 | ||
3159 | /* | |
3160 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3161 | * used. | |
3162 | */ | |
141eb8c6 MC |
3163 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3164 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3165 | |
3166 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3167 | sizeof(sctpauthkey), labelbuffer, |
3168 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3169 | goto err; |
3170 | ||
3171 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3172 | sizeof(sctpauthkey), sctpauthkey); | |
3173 | } | |
3174 | #endif | |
3175 | ||
b9908bf9 MC |
3176 | return 1; |
3177 | err: | |
3178 | OPENSSL_clear_free(pms, pmslen); | |
3179 | s->s3->tmp.pms = NULL; | |
3180 | return 0; | |
0f113f3e | 3181 | } |
d02b48c6 | 3182 | |
0f113f3e MC |
3183 | /* |
3184 | * Check a certificate can be used for client authentication. Currently check | |
3185 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3186 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3187 | */ |
3188 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3189 | { |
0f113f3e | 3190 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3191 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3192 | return 0; |
3193 | /* | |
3194 | * If strict mode check suitability of chain before using it. This also | |
3195 | * adjusts suite B digest if necessary. | |
3196 | */ | |
3197 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3198 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3199 | return 0; | |
0f113f3e MC |
3200 | return 1; |
3201 | } | |
0d609395 | 3202 | |
be3583fa | 3203 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3204 | { |
3205 | X509 *x509 = NULL; | |
3206 | EVP_PKEY *pkey = NULL; | |
3207 | int i; | |
3208 | ||
b9908bf9 | 3209 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3210 | /* Let cert callback update client certificates if required */ |
3211 | if (s->cert->cert_cb) { | |
3212 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3213 | if (i < 0) { | |
3214 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3215 | return WORK_MORE_A; |
0f113f3e MC |
3216 | } |
3217 | if (i == 0) { | |
3218 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3219 | ossl_statem_set_error(s); |
eb5fd03b | 3220 | return WORK_ERROR; |
0f113f3e MC |
3221 | } |
3222 | s->rwstate = SSL_NOTHING; | |
3223 | } | |
3224 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3225 | return WORK_FINISHED_CONTINUE; |
3226 | ||
3227 | /* Fall through to WORK_MORE_B */ | |
3228 | wst = WORK_MORE_B; | |
0f113f3e MC |
3229 | } |
3230 | ||
3231 | /* We need to get a client cert */ | |
b9908bf9 | 3232 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3233 | /* |
3234 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3235 | * return(-1); We then get retied later | |
3236 | */ | |
0f113f3e MC |
3237 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3238 | if (i < 0) { | |
3239 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3240 | return WORK_MORE_B; |
0f113f3e MC |
3241 | } |
3242 | s->rwstate = SSL_NOTHING; | |
3243 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3244 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3245 | i = 0; | |
3246 | } else if (i == 1) { | |
3247 | i = 0; | |
b9908bf9 | 3248 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3249 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3250 | } | |
3251 | ||
222561fe | 3252 | X509_free(x509); |
25aaa98a | 3253 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3254 | if (i && !ssl3_check_client_certificate(s)) |
3255 | i = 0; | |
3256 | if (i == 0) { | |
3257 | if (s->version == SSL3_VERSION) { | |
3258 | s->s3->tmp.cert_req = 0; | |
3259 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3260 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3261 | } else { |
3262 | s->s3->tmp.cert_req = 2; | |
124037fd | 3263 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3264 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3265 | ossl_statem_set_error(s); |
eb5fd03b | 3266 | return WORK_ERROR; |
dab18ab5 | 3267 | } |
0f113f3e MC |
3268 | } |
3269 | } | |
3270 | ||
b9908bf9 | 3271 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3272 | } |
3273 | ||
b9908bf9 MC |
3274 | /* Shouldn't ever get here */ |
3275 | return WORK_ERROR; | |
3276 | } | |
3277 | ||
7cea05dc | 3278 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3279 | { |
0baed5e9 | 3280 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3281 | |
3282 | /* | |
3283 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3284 | * later | |
3285 | */ | |
3286 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3287 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3288 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3289 | : s->cert->key, |
3290 | &al)) { | |
b9908bf9 | 3291 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
f7e393be MC |
3292 | goto err; |
3293 | } | |
3294 | ||
3295 | if (SSL_IS_TLS13(s) | |
3296 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3297 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3298 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3299 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, | |
3300 | SSL_R_CANNOT_CHANGE_CIPHER); | |
c31ad0bb BE |
3301 | /* |
3302 | * This is a fatal error, which leaves | |
3303 | * enc_write_ctx in an inconsistent state | |
3304 | * and thus ssl3_send_alert may crash. | |
3305 | */ | |
3306 | return 0; | |
0f113f3e | 3307 | } |
b9908bf9 MC |
3308 | |
3309 | return 1; | |
f7e393be MC |
3310 | err: |
3311 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3312 | return 0; | |
0f113f3e MC |
3313 | } |
3314 | ||
36d16f8e | 3315 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3316 | { |
dd24857b DSH |
3317 | const SSL_CERT_LOOKUP *clu; |
3318 | size_t idx; | |
0f113f3e | 3319 | long alg_k, alg_a; |
26c79d56 | 3320 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3321 | |
0f113f3e MC |
3322 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3323 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3324 | |
0f113f3e | 3325 | /* we don't have a certificate */ |
dd24857b DSH |
3326 | if (!(alg_a & SSL_aCERT)) |
3327 | return 1; | |
d02b48c6 | 3328 | |
0f113f3e | 3329 | /* This is the passed certificate */ |
dd24857b | 3330 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3331 | |
dd24857b DSH |
3332 | /* Check certificate is recognised and suitable for cipher */ |
3333 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
3334 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_SIGNING_CERT); | |
0f113f3e | 3335 | goto f_err; |
0f113f3e | 3336 | } |
0f113f3e | 3337 | |
dd24857b DSH |
3338 | #ifndef OPENSSL_NO_EC |
3339 | if (clu->amask & SSL_aECDSA) { | |
3340 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3341 | return 1; | |
3342 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
0f113f3e MC |
3343 | goto f_err; |
3344 | } | |
d02b48c6 | 3345 | #endif |
bc36ee62 | 3346 | #ifndef OPENSSL_NO_RSA |
dd24857b | 3347 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
361a1191 KR |
3348 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3349 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3350 | goto f_err; | |
0f113f3e | 3351 | } |
79df9d62 | 3352 | #endif |
bc36ee62 | 3353 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3354 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3355 | al = SSL_AD_INTERNAL_ERROR; |
3356 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3357 | goto f_err; |
0f113f3e | 3358 | } |
d02b48c6 RE |
3359 | #endif |
3360 | ||
dd24857b | 3361 | return 1; |
0f113f3e | 3362 | f_err: |
26c79d56 | 3363 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
dd24857b | 3364 | return 0; |
0f113f3e MC |
3365 | } |
3366 | ||
e481f9b9 | 3367 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3368 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3369 | { |
15e6be6c MC |
3370 | size_t len, padding_len; |
3371 | unsigned char *padding = NULL; | |
15e6be6c | 3372 | |
aff8c126 | 3373 | len = s->ext.npn_len; |
b9908bf9 | 3374 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3375 | |
aff8c126 | 3376 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3377 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3378 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3379 | goto err; | |
3380 | } | |
3381 | ||
3382 | memset(padding, 0, padding_len); | |
3383 | ||
b9908bf9 | 3384 | return 1; |
15e6be6c | 3385 | err: |
15e6be6c MC |
3386 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3387 | return 0; | |
b9908bf9 | 3388 | } |
6434abbf | 3389 | #endif |
368888bc | 3390 | |
c7f47786 MC |
3391 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3392 | { | |
3393 | if (PACKET_remaining(pkt) > 0) { | |
3394 | /* should contain no data */ | |
3395 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3396 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3397 | ossl_statem_set_error(s); | |
3398 | return MSG_PROCESS_ERROR; | |
3399 | } | |
3400 | ||
db0f35dd TS |
3401 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3402 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3403 | return MSG_PROCESS_FINISHED_READING; | |
3404 | } | |
3405 | ||
c7f47786 | 3406 | /* |
1f04f23e MC |
3407 | * This is a historical discrepancy (not in the RFC) maintained for |
3408 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3409 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3410 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3411 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3412 | */ |
3413 | if (SSL_IS_DTLS(s)) | |
3414 | SSL_renegotiate(s); | |
3415 | else | |
3416 | SSL_renegotiate_abbreviated(s); | |
3417 | ||
3418 | return MSG_PROCESS_FINISHED_READING; | |
3419 | } | |
3420 | ||
e46f2334 MC |
3421 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3422 | { | |
3423 | int al = SSL_AD_INTERNAL_ERROR; | |
3424 | PACKET extensions; | |
3434f40b | 3425 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3426 | |
26b9172a MC |
3427 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3428 | || PACKET_remaining(pkt) != 0) { | |
e46f2334 MC |
3429 | al = SSL_AD_DECODE_ERROR; |
3430 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3431 | goto err; | |
3432 | } | |
3433 | ||
fe874d27 MC |
3434 | if (!tls_collect_extensions(s, &extensions, |
3435 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
735d5b59 | 3436 | &al, NULL, 1) |
fe874d27 | 3437 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
735d5b59 | 3438 | rawexts, NULL, 0, &al, 1)) |
3434f40b MC |
3439 | goto err; |
3440 | ||
1b0286a3 | 3441 | OPENSSL_free(rawexts); |
e46f2334 MC |
3442 | return MSG_PROCESS_CONTINUE_READING; |
3443 | ||
3444 | err: | |
3445 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3446 | ossl_statem_set_error(s); | |
1b0286a3 | 3447 | OPENSSL_free(rawexts); |
e46f2334 MC |
3448 | return MSG_PROCESS_ERROR; |
3449 | } | |
3450 | ||
368888bc | 3451 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3452 | { |
3453 | int i = 0; | |
368888bc | 3454 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3455 | if (s->ctx->client_cert_engine) { |
3456 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3457 | SSL_get_client_CA_list(s), | |
3458 | px509, ppkey, NULL, NULL, NULL); | |
3459 | if (i != 0) | |
3460 | return i; | |
3461 | } | |
3462 | #endif | |
3463 | if (s->ctx->client_cert_cb) | |
3464 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3465 | return i; | |
3466 | } | |
d45ba43d | 3467 | |
ae2f7b37 | 3468 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3469 | { |
2c7b4dbc | 3470 | int i; |
aafec89c | 3471 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d MC |
3472 | int empty_reneg_info_scsv = !s->renegotiate; |
3473 | /* Set disabled masks for this session */ | |
3474 | ssl_set_client_disabled(s); | |
3475 | ||
3476 | if (sk == NULL) | |
3477 | return (0); | |
d45ba43d | 3478 | |
2c7b4dbc MC |
3479 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3480 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3481 | # error Max cipher length too short | |
3482 | # endif | |
3483 | /* | |
3484 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3485 | * chop number of supported ciphers to keep it well below this if we | |
3486 | * use TLS v1.2 | |
3487 | */ | |
3488 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3489 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3490 | else | |
3491 | #endif | |
3492 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3493 | maxlen = 0xfffe; | |
3494 | ||
3495 | if (empty_reneg_info_scsv) | |
3496 | maxlen -= 2; | |
3497 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3498 | maxlen -= 2; | |
3499 | ||
3500 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3501 | const SSL_CIPHER *c; | |
3502 | ||
d45ba43d MC |
3503 | c = sk_SSL_CIPHER_value(sk, i); |
3504 | /* Skip disabled ciphers */ | |
8af91fd9 | 3505 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3506 | continue; |
2c7b4dbc MC |
3507 | |
3508 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3509 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3510 | return 0; | |
3511 | } | |
3512 | ||
aafec89c MC |
3513 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3514 | if (!maxverok) { | |
3515 | if (SSL_IS_DTLS(s)) { | |
3516 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3517 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3518 | maxverok = 1; | |
3519 | } else { | |
3520 | if (c->max_tls >= s->s3->tmp.max_ver | |
3521 | && c->min_tls <= s->s3->tmp.max_ver) | |
3522 | maxverok = 1; | |
3523 | } | |
3524 | } | |
3525 | ||
2c7b4dbc | 3526 | totlen += len; |
d45ba43d | 3527 | } |
2c7b4dbc | 3528 | |
aafec89c | 3529 | if (totlen == 0 || !maxverok) { |
2c7b4dbc | 3530 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); |
aafec89c MC |
3531 | |
3532 | if (!maxverok) | |
3533 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3534 | "SSL/TLS version"); | |
3535 | ||
2c7b4dbc MC |
3536 | return 0; |
3537 | } | |
3538 | ||
3539 | if (totlen != 0) { | |
d45ba43d MC |
3540 | if (empty_reneg_info_scsv) { |
3541 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3542 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3543 | }; |
2c7b4dbc MC |
3544 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3545 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3546 | return 0; | |
3547 | } | |
d45ba43d MC |
3548 | } |
3549 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3550 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3551 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3552 | }; |
2c7b4dbc MC |
3553 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3554 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3555 | return 0; | |
3556 | } | |
d45ba43d MC |
3557 | } |
3558 | } | |
3559 | ||
2c7b4dbc | 3560 | return 1; |
d45ba43d | 3561 | } |
ef6c191b MC |
3562 | |
3563 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3564 | { | |
3565 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3566 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
3567 | SSLerr(SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3568 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3569 | return 0; | |
3570 | } | |
3571 | ||
3572 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3573 | return 1; | |
3574 | } |