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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 | ||
1574 | /* This will fail if it doesn't choose TLSv1.3+ */ | |
c3043dcd | 1575 | errorcode = ssl_choose_client_version(s, sversion, 0, &al); |
2248dbeb | 1576 | if (errorcode != 0) { |
2248dbeb | 1577 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode); |
3847d426 MC |
1578 | goto f_err; |
1579 | } | |
1580 | ||
11c67eea MC |
1581 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
1582 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH); | |
1583 | al = SSL_AD_DECODE_ERROR; | |
1584 | goto f_err; | |
1585 | } | |
1586 | ||
1587 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1588 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1589 | goto f_err; | |
1590 | } | |
1591 | ||
66d4bf6b MC |
1592 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1593 | /* Must have a non-empty extensions block */ | |
1594 | || PACKET_remaining(&extpkt) == 0 | |
1595 | /* Must be no trailing data after extensions */ | |
1596 | || PACKET_remaining(pkt) != 0) { | |
3847d426 MC |
1597 | al = SSL_AD_DECODE_ERROR; |
1598 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH); | |
1599 | goto f_err; | |
1600 | } | |
1601 | ||
fe874d27 | 1602 | if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
735d5b59 | 1603 | &extensions, &al, NULL, 1) |
fe874d27 | 1604 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
735d5b59 | 1605 | extensions, NULL, 0, &al, 1)) |
3847d426 MC |
1606 | goto f_err; |
1607 | ||
1608 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1609 | extensions = NULL; |
1610 | ||
1611 | if (s->ext.tls13_cookie_len == 0 && s->s3->tmp.pkey != NULL) { | |
1612 | /* | |
1613 | * We didn't receive a cookie or a new key_share so the next | |
1614 | * ClientHello will not change | |
1615 | */ | |
1616 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1617 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, | |
1618 | SSL_R_NO_CHANGE_FOLLOWING_HRR); | |
1619 | goto f_err; | |
1620 | } | |
3847d426 | 1621 | |
11c67eea MC |
1622 | /* |
1623 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1624 | * a synthetic message_hash in place of ClientHello1. | |
1625 | */ | |
1626 | if (!create_synthetic_message_hash(s)) { | |
1627 | al = SSL_AD_INTERNAL_ERROR; | |
1628 | goto f_err; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Add this message to the Transcript Hash. Normally this is done | |
1633 | * automatically prior to the message processing stage. However due to the | |
1634 | * need to create the synthetic message hash, we defer that step until now | |
1635 | * for HRR messages. | |
1636 | */ | |
1637 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1638 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
1639 | al = SSL_AD_INTERNAL_ERROR; | |
1640 | SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); | |
1641 | goto f_err; | |
1642 | } | |
1643 | ||
3847d426 MC |
1644 | return MSG_PROCESS_FINISHED_READING; |
1645 | f_err: | |
1646 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1647 | ossl_statem_set_error(s); | |
1648 | OPENSSL_free(extensions); | |
1649 | return MSG_PROCESS_ERROR; | |
1650 | } | |
1651 | ||
be3583fa | 1652 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1653 | { |
1654 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1655 | unsigned long cert_list_len, cert_len; | |
1656 | X509 *x = NULL; | |
b6981744 | 1657 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1658 | STACK_OF(X509) *sk = NULL; |
1659 | EVP_PKEY *pkey = NULL; | |
d805a57b | 1660 | size_t chainidx; |
e96e0f8e | 1661 | unsigned int context = 0; |
0f113f3e MC |
1662 | |
1663 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1664 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1665 | goto err; |
0f113f3e MC |
1666 | } |
1667 | ||
e96e0f8e MC |
1668 | if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
1669 | || context != 0 | |
1670 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1671 | || PACKET_remaining(pkt) != cert_list_len |
1672 | || PACKET_remaining(pkt) == 0) { | |
0f113f3e | 1673 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1674 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1675 | goto f_err; |
1676 | } | |
d805a57b | 1677 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1678 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1679 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
0f113f3e | 1680 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1681 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1682 | SSL_R_CERT_LENGTH_MISMATCH); |
1683 | goto f_err; | |
1684 | } | |
1685 | ||
df758a85 MC |
1686 | certstart = certbytes; |
1687 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1688 | if (x == NULL) { |
1689 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1690 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1691 | goto f_err; |
1692 | } | |
df758a85 | 1693 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1694 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1695 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1696 | SSL_R_CERT_LENGTH_MISMATCH); |
1697 | goto f_err; | |
1698 | } | |
e96e0f8e MC |
1699 | |
1700 | if (SSL_IS_TLS13(s)) { | |
1701 | RAW_EXTENSION *rawexts = NULL; | |
1702 | PACKET extensions; | |
1703 | ||
1704 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
1705 | al = SSL_AD_DECODE_ERROR; | |
1706 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH); | |
1707 | goto f_err; | |
1708 | } | |
fe874d27 MC |
1709 | if (!tls_collect_extensions(s, &extensions, |
1710 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
735d5b59 | 1711 | &al, NULL, chainidx == 0) |
8e1634ec TT |
1712 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
1713 | rawexts, x, chainidx, &al, | |
1714 | PACKET_remaining(pkt) == 0)) { | |
5ee289ea | 1715 | OPENSSL_free(rawexts); |
e96e0f8e | 1716 | goto f_err; |
5ee289ea MC |
1717 | } |
1718 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1719 | } |
1720 | ||
0f113f3e | 1721 | if (!sk_X509_push(sk, x)) { |
b9908bf9 | 1722 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1723 | goto err; |
0f113f3e MC |
1724 | } |
1725 | x = NULL; | |
0f113f3e MC |
1726 | } |
1727 | ||
1728 | i = ssl_verify_cert_chain(s, sk); | |
c8e2f98c MC |
1729 | /* |
1730 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1731 | * for client side verification of the server certificate to take place. | |
1732 | * However, historically the code has only checked that *any* flag is set | |
1733 | * to cause server verification to take place. Use of the other flags makes | |
1734 | * no sense in client mode. An attempt to clean up the semantics was | |
1735 | * reverted because at least one application *only* set | |
1736 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1737 | * server verification to take place, after the clean up it silently did | |
1738 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1739 | * sent to them because they are void functions. Therefore, we now use the | |
1740 | * (less clean) historic behaviour of performing validation if any flag is | |
1741 | * set. The *documented* interface remains the same. | |
1742 | */ | |
1743 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { | |
0f113f3e | 1744 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1745 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1746 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1747 | goto f_err; | |
1748 | } | |
1749 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1750 | if (i > 1) { | |
b9908bf9 | 1751 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1752 | al = SSL_AD_HANDSHAKE_FAILURE; |
1753 | goto f_err; | |
1754 | } | |
1755 | ||
c34b0f99 | 1756 | s->session->peer_chain = sk; |
0f113f3e MC |
1757 | /* |
1758 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1759 | * which we don't include in statem_srvr.c |
0f113f3e MC |
1760 | */ |
1761 | x = sk_X509_value(sk, 0); | |
1762 | sk = NULL; | |
1763 | /* | |
1764 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1765 | */ | |
1766 | ||
8382fd3a | 1767 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1768 | |
55a9a16f | 1769 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e | 1770 | x = NULL; |
f69fe73a | 1771 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1772 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1773 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1774 | goto f_err; | |
1775 | } | |
1776 | ||
1777 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1778 | if (i < 0) { |
0f113f3e MC |
1779 | x = NULL; |
1780 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1781 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1782 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1783 | goto f_err; | |
1784 | } | |
05b8486e DSH |
1785 | /* |
1786 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1787 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1788 | * type. | |
1789 | */ | |
1790 | if (!SSL_IS_TLS13(s)) { | |
1791 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1792 | if (exp_idx >= 0 && i != exp_idx | |
b2021556 DSH |
1793 | && (exp_idx != SSL_PKEY_ECC || i != SSL_PKEY_ED25519) |
1794 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1795 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1796 | && i != SSL_PKEY_GOST01))) { | |
05b8486e DSH |
1797 | x = NULL; |
1798 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1799 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, | |
1800 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1801 | goto f_err; | |
1802 | } | |
0f113f3e | 1803 | } |
a273c6ee | 1804 | s->session->peer_type = i; |
55a9a16f MC |
1805 | |
1806 | X509_free(s->session->peer); | |
05f0fb9f | 1807 | X509_up_ref(x); |
55a9a16f | 1808 | s->session->peer = x; |
0f113f3e | 1809 | s->session->verify_result = s->verify_result; |
0f113f3e | 1810 | x = NULL; |
2c5dfdc3 MC |
1811 | |
1812 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1813 | if (SSL_IS_TLS13(s) | |
1814 | && !ssl_handshake_hash(s, s->cert_verify_hash, | |
1815 | sizeof(s->cert_verify_hash), | |
1816 | &s->cert_verify_hash_len)) { | |
1817 | al = SSL_AD_INTERNAL_ERROR; | |
1818 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1819 | goto f_err; | |
1820 | } | |
1821 | ||
b9908bf9 | 1822 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1823 | goto done; |
1824 | ||
0f113f3e | 1825 | f_err: |
66696478 | 1826 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1827 | err: |
fe3a3291 | 1828 | ossl_statem_set_error(s); |
66696478 | 1829 | done: |
0f113f3e MC |
1830 | X509_free(x); |
1831 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1832 | return ret; |
0f113f3e | 1833 | } |
d02b48c6 | 1834 | |
7dc1c647 | 1835 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al) |
02a74590 MC |
1836 | { |
1837 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 1838 | PACKET psk_identity_hint; |
02a74590 | 1839 | |
7dc1c647 MC |
1840 | /* PSK ciphersuites are preceded by an identity hint */ |
1841 | ||
1842 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
1843 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1844 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
1845 | return 0; |
1846 | } | |
1847 | ||
1848 | /* | |
1849 | * Store PSK identity hint for later use, hint is used in | |
1850 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
1851 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1852 | * identity. | |
1853 | */ | |
1854 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
1855 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1856 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
1857 | return 0; |
1858 | } | |
02a74590 | 1859 | |
7dc1c647 MC |
1860 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1861 | OPENSSL_free(s->session->psk_identity_hint); | |
1862 | s->session->psk_identity_hint = NULL; | |
1863 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 1864 | &s->session->psk_identity_hint)) { |
7dc1c647 MC |
1865 | *al = SSL_AD_INTERNAL_ERROR; |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | return 1; | |
1870 | #else | |
4fa88861 | 1871 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
1872 | *al = SSL_AD_INTERNAL_ERROR; |
1873 | return 0; | |
02a74590 MC |
1874 | #endif |
1875 | } | |
1876 | ||
25c6c10c MC |
1877 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1878 | { | |
1879 | #ifndef OPENSSL_NO_SRP | |
1880 | PACKET prime, generator, salt, server_pub; | |
1881 | ||
1882 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
1883 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1884 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1885 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
1886 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1887 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
1888 | return 0; |
1889 | } | |
1890 | ||
348240c6 | 1891 | /* TODO(size_t): Convert BN_bin2bn() calls */ |
25c6c10c MC |
1892 | if ((s->srp_ctx.N = |
1893 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 1894 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
1895 | || (s->srp_ctx.g = |
1896 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 1897 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
1898 | || (s->srp_ctx.s = |
1899 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 1900 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
1901 | || (s->srp_ctx.B = |
1902 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 1903 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
25c6c10c | 1904 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 1905 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB); |
25c6c10c MC |
1906 | return 0; |
1907 | } | |
1908 | ||
1909 | if (!srp_verify_server_param(s, al)) { | |
4fa88861 | 1910 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS); |
25c6c10c MC |
1911 | return 0; |
1912 | } | |
1913 | ||
1914 | /* We must check if there is a certificate */ | |
a230b26e | 1915 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
1916 | *pkey = X509_get0_pubkey(s->session->peer); |
1917 | ||
1918 | return 1; | |
1919 | #else | |
4fa88861 | 1920 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
1921 | *al = SSL_AD_INTERNAL_ERROR; |
1922 | return 0; | |
1923 | #endif | |
1924 | } | |
1925 | ||
e01a610d MC |
1926 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
1927 | { | |
1928 | #ifndef OPENSSL_NO_DH | |
1929 | PACKET prime, generator, pub_key; | |
1930 | EVP_PKEY *peer_tmp = NULL; | |
1931 | ||
1932 | DH *dh = NULL; | |
1933 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
1934 | ||
26505153 RL |
1935 | int check_bits = 0; |
1936 | ||
e01a610d MC |
1937 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1938 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1939 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
1940 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 1941 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
1942 | return 0; |
1943 | } | |
1944 | ||
1945 | peer_tmp = EVP_PKEY_new(); | |
1946 | dh = DH_new(); | |
1947 | ||
1948 | if (peer_tmp == NULL || dh == NULL) { | |
1949 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1950 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE); |
e01a610d MC |
1951 | goto err; |
1952 | } | |
1953 | ||
348240c6 MC |
1954 | /* TODO(size_t): Convert these calls */ |
1955 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); | |
1956 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
1957 | NULL); | |
1958 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
1959 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d MC |
1960 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
1961 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1962 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1963 | goto err; |
1964 | } | |
1965 | ||
69687aa8 | 1966 | /* test non-zero pubkey */ |
26505153 | 1967 | if (BN_is_zero(bnpub_key)) { |
fb34a0f4 | 1968 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 1969 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
1970 | goto err; |
1971 | } | |
1972 | ||
1973 | if (!DH_set0_pqg(dh, p, NULL, g)) { | |
1974 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1975 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1976 | goto err; |
1977 | } | |
1978 | p = g = NULL; | |
1979 | ||
26505153 | 1980 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) { |
fb34a0f4 | 1981 | *al = SSL_AD_ILLEGAL_PARAMETER; |
26505153 RL |
1982 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE); |
1983 | goto err; | |
1984 | } | |
1985 | ||
e01a610d MC |
1986 | if (!DH_set0_key(dh, bnpub_key, NULL)) { |
1987 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 1988 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB); |
e01a610d MC |
1989 | goto err; |
1990 | } | |
1991 | bnpub_key = NULL; | |
1992 | ||
1993 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1994 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
4fa88861 | 1995 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL); |
e01a610d MC |
1996 | goto err; |
1997 | } | |
1998 | ||
1999 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
2000 | *al = SSL_AD_INTERNAL_ERROR; | |
4fa88861 | 2001 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB); |
e01a610d MC |
2002 | goto err; |
2003 | } | |
2004 | ||
2005 | s->s3->peer_tmp = peer_tmp; | |
2006 | ||
2007 | /* | |
2008 | * FIXME: This makes assumptions about which ciphersuites come with | |
2009 | * public keys. We should have a less ad-hoc way of doing this | |
2010 | */ | |
a230b26e | 2011 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2012 | *pkey = X509_get0_pubkey(s->session->peer); |
2013 | /* else anonymous DH, so no certificate or pkey. */ | |
2014 | ||
2015 | return 1; | |
2016 | ||
2017 | err: | |
2018 | BN_free(p); | |
2019 | BN_free(g); | |
2020 | BN_free(bnpub_key); | |
2021 | DH_free(dh); | |
2022 | EVP_PKEY_free(peer_tmp); | |
2023 | ||
2024 | return 0; | |
2025 | #else | |
4fa88861 | 2026 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR); |
e01a610d MC |
2027 | *al = SSL_AD_INTERNAL_ERROR; |
2028 | return 0; | |
2029 | #endif | |
2030 | } | |
2031 | ||
ff74aeb1 MC |
2032 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al) |
2033 | { | |
2034 | #ifndef OPENSSL_NO_EC | |
2035 | PACKET encoded_pt; | |
2036 | const unsigned char *ecparams; | |
2037 | int curve_nid; | |
ec24630a | 2038 | unsigned int curve_flags; |
ff74aeb1 MC |
2039 | EVP_PKEY_CTX *pctx = NULL; |
2040 | ||
2041 | /* | |
2042 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
2043 | * public key. For now we only support named (not generic) curves and | |
2044 | * ECParameters in this case is just three bytes. | |
2045 | */ | |
2046 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { | |
2047 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2048 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2049 | return 0; |
2050 | } | |
2051 | /* | |
2052 | * Check curve is one of our preferences, if not server has sent an | |
2053 | * invalid curve. ECParameters is 3 bytes. | |
2054 | */ | |
2055 | if (!tls1_check_curve(s, ecparams, 3)) { | |
fb34a0f4 | 2056 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 2057 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2058 | return 0; |
2059 | } | |
2060 | ||
ec24630a DSH |
2061 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags); |
2062 | ||
a230b26e | 2063 | if (curve_nid == 0) { |
ff74aeb1 | 2064 | *al = SSL_AD_INTERNAL_ERROR; |
4fa88861 | 2065 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, |
ff74aeb1 MC |
2066 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
2067 | return 0; | |
2068 | } | |
2069 | ||
ec24630a DSH |
2070 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { |
2071 | EVP_PKEY *key = EVP_PKEY_new(); | |
2072 | ||
2073 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) { | |
2074 | *al = SSL_AD_INTERNAL_ERROR; | |
2075 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2076 | EVP_PKEY_free(key); | |
2077 | return 0; | |
2078 | } | |
2079 | s->s3->peer_tmp = key; | |
2080 | } else { | |
2081 | /* Set up EVP_PKEY with named curve as parameters */ | |
2082 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
2083 | if (pctx == NULL | |
2084 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
2085 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
2086 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
2087 | *al = SSL_AD_INTERNAL_ERROR; | |
2088 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB); | |
2089 | EVP_PKEY_CTX_free(pctx); | |
2090 | return 0; | |
2091 | } | |
ff74aeb1 | 2092 | EVP_PKEY_CTX_free(pctx); |
ec24630a | 2093 | pctx = NULL; |
ff74aeb1 | 2094 | } |
ff74aeb1 MC |
2095 | |
2096 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { | |
2097 | *al = SSL_AD_DECODE_ERROR; | |
4fa88861 | 2098 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2099 | return 0; |
2100 | } | |
2101 | ||
ec24630a DSH |
2102 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, |
2103 | PACKET_data(&encoded_pt), | |
2104 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 2105 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4fa88861 | 2106 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2107 | return 0; |
2108 | } | |
2109 | ||
2110 | /* | |
2111 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2112 | * ECParameters in the server key exchange message. We do support RSA | |
2113 | * and ECDSA. | |
2114 | */ | |
2115 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) | |
2116 | *pkey = X509_get0_pubkey(s->session->peer); | |
2117 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA) | |
2118 | *pkey = X509_get0_pubkey(s->session->peer); | |
2119 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2120 | ||
2121 | return 1; | |
2122 | #else | |
4fa88861 | 2123 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR); |
ff74aeb1 MC |
2124 | *al = SSL_AD_INTERNAL_ERROR; |
2125 | return 0; | |
2126 | #endif | |
2127 | } | |
2128 | ||
be3583fa | 2129 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 2130 | { |
5554facb | 2131 | int al = -1; |
e1e588ac | 2132 | long alg_k; |
b9908bf9 | 2133 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2134 | EVP_MD_CTX *md_ctx = NULL; |
2135 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2136 | PACKET save_param_start, signature; |
b9908bf9 | 2137 | |
b9908bf9 MC |
2138 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2139 | ||
73999b62 | 2140 | save_param_start = *pkt; |
8d92c1f8 | 2141 | |
3260adf1 | 2142 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
2143 | EVP_PKEY_free(s->s3->peer_tmp); |
2144 | s->s3->peer_tmp = NULL; | |
3260adf1 | 2145 | #endif |
d02b48c6 | 2146 | |
7689082b | 2147 | if (alg_k & SSL_PSK) { |
7dc1c647 MC |
2148 | if (!tls_process_ske_psk_preamble(s, pkt, &al)) |
2149 | goto err; | |
7689082b DSH |
2150 | } |
2151 | ||
2152 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2153 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c MC |
2154 | } else if (alg_k & SSL_kSRP) { |
2155 | if (!tls_process_ske_srp(s, pkt, &pkey, &al)) | |
0f113f3e | 2156 | goto err; |
e01a610d MC |
2157 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
2158 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al)) | |
2159 | goto err; | |
ff74aeb1 MC |
2160 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2161 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al)) | |
2162 | goto err; | |
0f113f3e MC |
2163 | } else if (alg_k) { |
2164 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 2165 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2166 | goto err; |
0f113f3e | 2167 | } |
0f113f3e | 2168 | |
0f113f3e MC |
2169 | /* if it was signed, check the signature */ |
2170 | if (pkey != NULL) { | |
32942870 | 2171 | PACKET params; |
be8dba2c MC |
2172 | int maxsig; |
2173 | const EVP_MD *md = NULL; | |
72ceb6a6 DSH |
2174 | unsigned char *tbs; |
2175 | size_t tbslen; | |
2176 | int rv; | |
e1e588ac | 2177 | |
32942870 EK |
2178 | /* |
2179 | * |pkt| now points to the beginning of the signature, so the difference | |
2180 | * equals the length of the parameters. | |
2181 | */ | |
2182 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2183 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2184 | PACKET_remaining(pkt))) { |
fb34a0f4 | 2185 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2186 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2187 | goto err; |
32942870 EK |
2188 | } |
2189 | ||
0f113f3e | 2190 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2191 | unsigned int sigalg; |
703bcee0 MC |
2192 | |
2193 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
e1e588ac | 2194 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2195 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2196 | goto err; |
0f113f3e | 2197 | } |
5554facb | 2198 | rv = tls12_check_peer_sigalg(s, sigalg, pkey); |
e1e588ac MC |
2199 | if (rv == -1) { |
2200 | al = SSL_AD_INTERNAL_ERROR; | |
2201 | goto err; | |
2202 | } else if (rv == 0) { | |
2203 | al = SSL_AD_DECODE_ERROR; | |
0f113f3e | 2204 | goto err; |
0f113f3e | 2205 | } |
a2f9200f | 2206 | #ifdef SSL_DEBUG |
0f113f3e MC |
2207 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
2208 | #endif | |
f365a3e2 DSH |
2209 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
2210 | al = SSL_AD_INTERNAL_ERROR; | |
2211 | goto err; | |
32942870 | 2212 | } |
0f113f3e | 2213 | |
b2021556 DSH |
2214 | if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) { |
2215 | al = SSL_AD_INTERNAL_ERROR; | |
2216 | goto err; | |
2217 | } | |
f365a3e2 | 2218 | |
73999b62 MC |
2219 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2220 | || PACKET_remaining(pkt) != 0) { | |
e1e588ac | 2221 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2222 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2223 | goto err; |
0f113f3e | 2224 | } |
be8dba2c MC |
2225 | maxsig = EVP_PKEY_size(pkey); |
2226 | if (maxsig < 0) { | |
e1e588ac | 2227 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2228 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2229 | goto err; |
8098fc56 | 2230 | } |
0f113f3e MC |
2231 | |
2232 | /* | |
8098fc56 | 2233 | * Check signature length |
0f113f3e | 2234 | */ |
be8dba2c | 2235 | if (PACKET_remaining(&signature) > (size_t)maxsig) { |
0f113f3e | 2236 | /* wrong packet length */ |
e1e588ac | 2237 | al = SSL_AD_DECODE_ERROR; |
a230b26e EK |
2238 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
2239 | SSL_R_WRONG_SIGNATURE_LENGTH); | |
e1e588ac MC |
2240 | goto err; |
2241 | } | |
2242 | ||
2243 | md_ctx = EVP_MD_CTX_new(); | |
2244 | if (md_ctx == NULL) { | |
2245 | al = SSL_AD_INTERNAL_ERROR; | |
2246 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2247 | goto err; | |
0f113f3e | 2248 | } |
e1e588ac | 2249 | |
fe3066ee MC |
2250 | if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { |
2251 | al = SSL_AD_INTERNAL_ERROR; | |
2252 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2253 | goto err; | |
2254 | } | |
5554facb | 2255 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2256 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2257 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2258 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
fe3066ee MC |
2259 | al = SSL_AD_INTERNAL_ERROR; |
2260 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
2261 | goto err; | |
2262 | } | |
2263 | } | |
72ceb6a6 DSH |
2264 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2265 | PACKET_remaining(¶ms)); | |
2266 | if (tbslen == 0) { | |
192e4bbb | 2267 | al = SSL_AD_INTERNAL_ERROR; |
72ceb6a6 | 2268 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
e1e588ac | 2269 | goto err; |
192e4bbb | 2270 | } |
72ceb6a6 DSH |
2271 | |
2272 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2273 | PACKET_remaining(&signature), tbs, tbslen); | |
2274 | OPENSSL_free(tbs); | |
cfba0675 | 2275 | if (rv <= 0) { |
192e4bbb DSH |
2276 | al = SSL_AD_DECRYPT_ERROR; |
2277 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
e1e588ac | 2278 | goto err; |
0f113f3e | 2279 | } |
e1e588ac | 2280 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2281 | md_ctx = NULL; |
0f113f3e | 2282 | } else { |
7689082b | 2283 | /* aNULL, aSRP or PSK do not need public keys */ |
e1e588ac | 2284 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2285 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2286 | /* Might be wrong key type, check it */ |
e1e588ac | 2287 | if (ssl3_check_cert_and_algorithm(s)) { |
0f113f3e | 2288 | /* Otherwise this shouldn't happen */ |
e1e588ac | 2289 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2290 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
e1e588ac MC |
2291 | } else { |
2292 | al = SSL_AD_DECODE_ERROR; | |
2293 | } | |
0f113f3e MC |
2294 | goto err; |
2295 | } | |
2296 | /* still data left over */ | |
73999b62 | 2297 | if (PACKET_remaining(pkt) != 0) { |
e1e588ac | 2298 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2299 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2300 | goto err; |
0f113f3e MC |
2301 | } |
2302 | } | |
e1e588ac | 2303 | |
b9908bf9 | 2304 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2305 | err: |
7dc1c647 MC |
2306 | if (al != -1) |
2307 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2308 | ossl_statem_set_error(s); |
fe3066ee | 2309 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2310 | return MSG_PROCESS_ERROR; |
0f113f3e | 2311 | } |
d02b48c6 | 2312 | |
be3583fa | 2313 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2314 | { |
2315 | int ret = MSG_PROCESS_ERROR; | |
32f66107 DSH |
2316 | int al = SSL_AD_DECODE_ERROR; |
2317 | size_t i; | |
2318 | ||
2319 | /* Clear certificate validity flags */ | |
2320 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
2321 | s->s3->tmp.valid_flags[i] = 0; | |
0f113f3e | 2322 | |
03f44b97 | 2323 | if (SSL_IS_TLS13(s)) { |
32f66107 DSH |
2324 | PACKET reqctx, extensions; |
2325 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 DSH |
2326 | |
2327 | /* Free and zero certificate types: it is not present in TLS 1.3 */ | |
2328 | OPENSSL_free(s->s3->tmp.ctype); | |
2329 | s->s3->tmp.ctype = NULL; | |
2330 | s->s3->tmp.ctype_len = 0; | |
32f66107 | 2331 | |
03f44b97 DSH |
2332 | /* TODO(TLS1.3) need to process request context, for now ignore */ |
2333 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) { | |
2334 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2335 | SSL_R_LENGTH_MISMATCH); | |
2336 | goto err; | |
2337 | } | |
32f66107 DSH |
2338 | |
2339 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
45615c5f | 2340 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_BAD_LENGTH); |
32f66107 DSH |
2341 | goto err; |
2342 | } | |
2343 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2344 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
735d5b59 | 2345 | &rawexts, &al, NULL, 1) |
fe874d27 | 2346 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
735d5b59 | 2347 | rawexts, NULL, 0, &al, 1)) { |
32f66107 DSH |
2348 | OPENSSL_free(rawexts); |
2349 | goto err; | |
2350 | } | |
2351 | OPENSSL_free(rawexts); | |
2352 | if (!tls1_process_sigalgs(s)) { | |
2353 | al = SSL_AD_INTERNAL_ERROR; | |
2354 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2355 | goto err; | |
2356 | } | |
03f44b97 DSH |
2357 | } else { |
2358 | PACKET ctypes; | |
75c13e78 | 2359 | |
03f44b97 DSH |
2360 | /* get the certificate types */ |
2361 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
03f44b97 DSH |
2362 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2363 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e | 2364 | goto err; |
03f44b97 DSH |
2365 | } |
2366 | ||
2367 | if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) { | |
32f66107 | 2368 | al = SSL_AD_INTERNAL_ERROR; |
03f44b97 DSH |
2369 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); |
2370 | goto err; | |
2371 | } | |
ac112332 | 2372 | |
32f66107 DSH |
2373 | if (SSL_USE_SIGALGS(s)) { |
2374 | PACKET sigalgs; | |
703bcee0 | 2375 | |
32f66107 DSH |
2376 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
2377 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2378 | SSL_R_LENGTH_MISMATCH); | |
2379 | goto err; | |
2380 | } | |
ac112332 | 2381 | |
32f66107 DSH |
2382 | if (!tls1_save_sigalgs(s, &sigalgs)) { |
2383 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2384 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2385 | goto err; | |
2386 | } | |
2387 | if (!tls1_process_sigalgs(s)) { | |
2388 | al = SSL_AD_INTERNAL_ERROR; | |
2389 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, | |
2390 | ERR_R_MALLOC_FAILURE); | |
2391 | goto err; | |
2392 | } | |
0f113f3e | 2393 | } |
0f113f3e | 2394 | |
32f66107 DSH |
2395 | /* get the CA RDNs */ |
2396 | if (!parse_ca_names(s, pkt, &al)) | |
03f44b97 | 2397 | goto err; |
03f44b97 DSH |
2398 | } |
2399 | ||
2400 | if (PACKET_remaining(pkt) != 0) { | |
03f44b97 DSH |
2401 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
2402 | goto err; | |
2403 | } | |
0f113f3e | 2404 | |
0f113f3e MC |
2405 | /* we should setup a certificate to return.... */ |
2406 | s->s3->tmp.cert_req = 1; | |
0f113f3e | 2407 | |
05c4f1d5 | 2408 | ret = MSG_PROCESS_CONTINUE_PROCESSING; |
cc273a93 | 2409 | goto done; |
0f113f3e | 2410 | err: |
32f66107 | 2411 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
fe3a3291 | 2412 | ossl_statem_set_error(s); |
cc273a93 | 2413 | done: |
b9908bf9 | 2414 | return ret; |
0f113f3e MC |
2415 | } |
2416 | ||
be3583fa | 2417 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 | 2418 | { |
6df55cac | 2419 | int al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2420 | unsigned int ticklen; |
9ac6244b | 2421 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2422 | unsigned int sess_len; |
de1df7e9 | 2423 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2424 | PACKET nonce; |
b9908bf9 | 2425 | |
73999b62 | 2426 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
9b6a8254 MC |
2427 | || (SSL_IS_TLS13(s) |
2428 | && (!PACKET_get_net_4(pkt, &age_add) | |
2429 | || !PACKET_get_length_prefixed_1(pkt, &nonce) | |
2430 | || PACKET_remaining(&nonce) == 0 | |
2431 | || !PACKET_memdup(&nonce, &s->session->ext.tick_nonce, | |
2432 | &s->session->ext.tick_nonce_len))) | |
a230b26e | 2433 | || !PACKET_get_net_2(pkt, &ticklen) |
de1df7e9 | 2434 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen) |
1f5b44e9 MC |
2435 | || (SSL_IS_TLS13(s) |
2436 | && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) { | |
f0659bdb | 2437 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2438 | goto f_err; |
2439 | } | |
2440 | ||
de1df7e9 MC |
2441 | /* |
2442 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2443 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2444 | * be 0 here in that instance | |
2445 | */ | |
e711da71 | 2446 | if (ticklen == 0) |
c9de4a20 | 2447 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2448 | |
150840b9 MC |
2449 | /* |
2450 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2451 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2452 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2453 | * time a NewSessionTicket arrives because those messages arrive | |
2454 | * post-handshake and the session may have already gone into the session | |
2455 | * cache. | |
2456 | */ | |
2457 | if (SSL_IS_TLS13(s) || s->session->session_id_length > 0) { | |
98ece4ee MC |
2458 | int i = s->session_ctx->session_cache_mode; |
2459 | SSL_SESSION *new_sess; | |
2460 | /* | |
2461 | * We reused an existing session, so we need to replace it with a new | |
2462 | * one | |
2463 | */ | |
2464 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2465 | /* | |
e4612d02 | 2466 | * Remove the old session from the cache. We carry on if this fails |
98ece4ee | 2467 | */ |
e4612d02 | 2468 | SSL_CTX_remove_session(s->session_ctx, s->session); |
98ece4ee MC |
2469 | } |
2470 | ||
2471 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2472 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2473 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2474 | goto f_err; |
2475 | } | |
2476 | ||
2477 | SSL_SESSION_free(s->session); | |
2478 | s->session = new_sess; | |
2479 | } | |
2480 | ||
fc24f0bf MC |
2481 | /* |
2482 | * Technically the cast to long here is not guaranteed by the C standard - | |
2483 | * but we use it elsewhere, so this should be ok. | |
2484 | */ | |
2485 | s->session->time = (long)time(NULL); | |
2486 | ||
aff8c126 RS |
2487 | OPENSSL_free(s->session->ext.tick); |
2488 | s->session->ext.tick = NULL; | |
2489 | s->session->ext.ticklen = 0; | |
e711da71 | 2490 | |
aff8c126 RS |
2491 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2492 | if (s->session->ext.tick == NULL) { | |
b9908bf9 | 2493 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2494 | goto err; |
2495 | } | |
aff8c126 | 2496 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
561e12bb | 2497 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2498 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2499 | goto f_err; |
2500 | } | |
e711da71 | 2501 | |
aff8c126 | 2502 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2503 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2504 | s->session->ext.ticklen = ticklen; |
de1df7e9 MC |
2505 | |
2506 | if (SSL_IS_TLS13(s)) { | |
2507 | PACKET extpkt; | |
2508 | ||
2509 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
26b9172a | 2510 | || PACKET_remaining(pkt) != 0 |
de1df7e9 | 2511 | || !tls_collect_extensions(s, &extpkt, |
fe874d27 | 2512 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, |
735d5b59 | 2513 | &exts, &al, NULL, 1) |
fe874d27 MC |
2514 | || !tls_parse_all_extensions(s, |
2515 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
735d5b59 | 2516 | exts, NULL, 0, &al, 1)) { |
de1df7e9 MC |
2517 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION); |
2518 | goto f_err; | |
2519 | } | |
2520 | } | |
2521 | ||
0f113f3e MC |
2522 | /* |
2523 | * There are two ways to detect a resumed ticket session. One is to set | |
2524 | * an appropriate session ID and then the server must return a match in | |
2525 | * ServerHello. This allows the normal client session ID matching to work | |
2526 | * and we know much earlier that the ticket has been accepted. The | |
2527 | * other way is to set zero length session ID when the ticket is | |
2528 | * presented and rely on the handshake to determine session resumption. | |
2529 | * We choose the former approach because this fits in with assumptions | |
2530 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2531 | * SHA256 is disabled) hash of the ticket. | |
2532 | */ | |
ec60ccc1 MC |
2533 | /* |
2534 | * TODO(size_t): we use sess_len here because EVP_Digest expects an int | |
2535 | * but s->session->session_id_length is a size_t | |
2536 | */ | |
aff8c126 | 2537 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2538 | s->session->session_id, &sess_len, |
d166ed8c DSH |
2539 | EVP_sha256(), NULL)) { |
2540 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); | |
2541 | goto err; | |
2542 | } | |
ec60ccc1 | 2543 | s->session->session_id_length = sess_len; |
de1df7e9 MC |
2544 | |
2545 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
2546 | if (SSL_IS_TLS13(s)) { | |
33d93417 | 2547 | OPENSSL_free(exts); |
de1df7e9 MC |
2548 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2549 | return MSG_PROCESS_FINISHED_READING; | |
2550 | } | |
2551 | ||
b9908bf9 | 2552 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2553 | f_err: |
2554 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2555 | err: | |
fe3a3291 | 2556 | ossl_statem_set_error(s); |
33d93417 | 2557 | OPENSSL_free(exts); |
b9908bf9 | 2558 | return MSG_PROCESS_ERROR; |
0f113f3e | 2559 | } |
67c8e7f4 | 2560 | |
f63e4288 MC |
2561 | /* |
2562 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
2563 | * parse a separate message. Returns 1 on success or 0 on failure. On failure | |
2564 | * |*al| is populated with a suitable alert code. | |
2565 | */ | |
2566 | int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al) | |
b9908bf9 | 2567 | { |
8b0e934a | 2568 | size_t resplen; |
b9908bf9 | 2569 | unsigned int type; |
b9908bf9 | 2570 | |
73999b62 | 2571 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2572 | || type != TLSEXT_STATUSTYPE_ocsp) { |
f63e4288 MC |
2573 | *al = SSL_AD_DECODE_ERROR; |
2574 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, | |
2575 | SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2576 | return 0; | |
0f113f3e | 2577 | } |
56a26ce3 MC |
2578 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2579 | || PACKET_remaining(pkt) != resplen) { | |
f63e4288 MC |
2580 | *al = SSL_AD_DECODE_ERROR; |
2581 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2582 | return 0; | |
0f113f3e | 2583 | } |
8cbfcc70 RS |
2584 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2585 | if (s->ext.ocsp.resp == NULL) { | |
f63e4288 MC |
2586 | *al = SSL_AD_INTERNAL_ERROR; |
2587 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE); | |
2588 | return 0; | |
0f113f3e | 2589 | } |
8cbfcc70 | 2590 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
f63e4288 MC |
2591 | *al = SSL_AD_DECODE_ERROR; |
2592 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH); | |
2593 | return 0; | |
ac63710a | 2594 | } |
8cbfcc70 | 2595 | s->ext.ocsp.resp_len = resplen; |
f63e4288 MC |
2596 | |
2597 | return 1; | |
2598 | } | |
2faa1b48 | 2599 | |
f63e4288 MC |
2600 | |
2601 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) | |
2602 | { | |
2603 | int al; | |
2604 | ||
2605 | if (!tls_process_cert_status_body(s, pkt, &al)) { | |
2606 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2607 | ossl_statem_set_error(s); | |
2608 | return MSG_PROCESS_ERROR; | |
2609 | } | |
2610 | ||
b9908bf9 | 2611 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2612 | } |
d02b48c6 | 2613 | |
7776a36c MC |
2614 | /* |
2615 | * Perform miscellaneous checks and processing after we have received the | |
2616 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2617 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2618 | * on failure. | |
7776a36c MC |
2619 | */ |
2620 | int tls_process_initial_server_flight(SSL *s, int *al) | |
b9908bf9 | 2621 | { |
a455d0f6 MC |
2622 | /* |
2623 | * at this point we check that we have the required stuff from | |
2624 | * the server | |
2625 | */ | |
2626 | if (!ssl3_check_cert_and_algorithm(s)) { | |
7776a36c MC |
2627 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2628 | return 0; | |
a455d0f6 MC |
2629 | } |
2630 | ||
bb1aaab4 | 2631 | /* |
aff8c126 RS |
2632 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2633 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2634 | * message, or NULL and -1 otherwise |
2635 | */ | |
aff8c126 RS |
2636 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
2637 | && s->ctx->ext.status_cb != NULL) { | |
2638 | int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); | |
2639 | ||
bb1aaab4 | 2640 | if (ret == 0) { |
7776a36c MC |
2641 | *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
2642 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
bb1aaab4 | 2643 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2644 | return 0; |
bb1aaab4 MC |
2645 | } |
2646 | if (ret < 0) { | |
7776a36c MC |
2647 | *al = SSL_AD_INTERNAL_ERROR; |
2648 | SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT, | |
2649 | ERR_R_MALLOC_FAILURE); | |
2650 | return 0; | |
bb1aaab4 MC |
2651 | } |
2652 | } | |
ed29e82a RP |
2653 | #ifndef OPENSSL_NO_CT |
2654 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2655 | /* Note we validate the SCTs whether or not we abort on error */ |
2656 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
7776a36c MC |
2657 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2658 | return 0; | |
ed29e82a RP |
2659 | } |
2660 | } | |
2661 | #endif | |
2662 | ||
7776a36c MC |
2663 | return 1; |
2664 | } | |
2665 | ||
2666 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) | |
2667 | { | |
2668 | int al = SSL_AD_INTERNAL_ERROR; | |
2669 | ||
2670 | if (PACKET_remaining(pkt) > 0) { | |
2671 | /* should contain no data */ | |
2672 | al = SSL_AD_DECODE_ERROR; | |
2673 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
2674 | goto err; | |
2675 | } | |
2676 | #ifndef OPENSSL_NO_SRP | |
2677 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2678 | if (SRP_Calc_A_param(s) <= 0) { | |
2679 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2680 | goto err; | |
2681 | } | |
2682 | } | |
2683 | #endif | |
2684 | ||
2685 | /* | |
2686 | * Error queue messages are generated directly by this function | |
2687 | */ | |
2688 | if (!tls_process_initial_server_flight(s, &al)) | |
2689 | goto err; | |
2690 | ||
bd79bcb4 | 2691 | return MSG_PROCESS_FINISHED_READING; |
7776a36c MC |
2692 | |
2693 | err: | |
2694 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2695 | ossl_statem_set_error(s); | |
2696 | return MSG_PROCESS_ERROR; | |
0f113f3e | 2697 | } |
176f31dd | 2698 | |
f1ec23c0 | 2699 | static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al) |
0f113f3e | 2700 | { |
7689082b | 2701 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2702 | int ret = 0; |
2703 | /* | |
2704 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2705 | * \0-terminated identity. The last byte is for us for simulating | |
2706 | * strnlen. | |
2707 | */ | |
2708 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2709 | size_t identitylen = 0; | |
2710 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2711 | unsigned char *tmppsk = NULL; | |
2712 | char *tmpidentity = NULL; | |
2713 | size_t psklen = 0; | |
2714 | ||
2715 | if (s->psk_client_callback == NULL) { | |
05ec6a25 | 2716 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2717 | *al = SSL_AD_INTERNAL_ERROR; |
2718 | goto err; | |
2719 | } | |
d02b48c6 | 2720 | |
13c0ec4a | 2721 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2722 | |
13c0ec4a MC |
2723 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2724 | identity, sizeof(identity) - 1, | |
2725 | psk, sizeof(psk)); | |
7689082b | 2726 | |
13c0ec4a | 2727 | if (psklen > PSK_MAX_PSK_LEN) { |
05ec6a25 | 2728 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2729 | *al = SSL_AD_HANDSHAKE_FAILURE; |
2730 | goto err; | |
2731 | } else if (psklen == 0) { | |
05ec6a25 | 2732 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, |
13c0ec4a MC |
2733 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
2734 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
2735 | goto err; | |
2736 | } | |
7689082b | 2737 | |
13c0ec4a MC |
2738 | identitylen = strlen(identity); |
2739 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
05ec6a25 | 2740 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
fb34a0f4 | 2741 | *al = SSL_AD_INTERNAL_ERROR; |
13c0ec4a MC |
2742 | goto err; |
2743 | } | |
7689082b | 2744 | |
13c0ec4a MC |
2745 | tmppsk = OPENSSL_memdup(psk, psklen); |
2746 | tmpidentity = OPENSSL_strdup(identity); | |
2747 | if (tmppsk == NULL || tmpidentity == NULL) { | |
05ec6a25 | 2748 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2749 | *al = SSL_AD_INTERNAL_ERROR; |
2750 | goto err; | |
2751 | } | |
7689082b | 2752 | |
13c0ec4a MC |
2753 | OPENSSL_free(s->s3->tmp.psk); |
2754 | s->s3->tmp.psk = tmppsk; | |
2755 | s->s3->tmp.psklen = psklen; | |
2756 | tmppsk = NULL; | |
2757 | OPENSSL_free(s->session->psk_identity); | |
2758 | s->session->psk_identity = tmpidentity; | |
2759 | tmpidentity = NULL; | |
f1ec23c0 | 2760 | |
b2b3024e | 2761 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
f1ec23c0 MC |
2762 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
2763 | *al = SSL_AD_INTERNAL_ERROR; | |
2764 | goto err; | |
2765 | } | |
7689082b | 2766 | |
13c0ec4a | 2767 | ret = 1; |
0bce0b02 | 2768 | |
13c0ec4a MC |
2769 | err: |
2770 | OPENSSL_cleanse(psk, psklen); | |
2771 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2772 | OPENSSL_clear_free(tmppsk, psklen); | |
2773 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2774 | |
13c0ec4a MC |
2775 | return ret; |
2776 | #else | |
05ec6a25 | 2777 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2778 | *al = SSL_AD_INTERNAL_ERROR; |
2779 | return 0; | |
b9908bf9 | 2780 | #endif |
13c0ec4a | 2781 | } |
b9908bf9 | 2782 | |
f1ec23c0 | 2783 | static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al) |
13c0ec4a | 2784 | { |
bc36ee62 | 2785 | #ifndef OPENSSL_NO_RSA |
f1ec23c0 | 2786 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2787 | EVP_PKEY *pkey = NULL; |
2788 | EVP_PKEY_CTX *pctx = NULL; | |
2789 | size_t enclen; | |
2790 | unsigned char *pms = NULL; | |
2791 | size_t pmslen = 0; | |
b9908bf9 | 2792 | |
13c0ec4a MC |
2793 | if (s->session->peer == NULL) { |
2794 | /* | |
2795 | * We should always have a server certificate with SSL_kRSA. | |
2796 | */ | |
05ec6a25 | 2797 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2798 | return 0; |
2799 | } | |
0f113f3e | 2800 | |
13c0ec4a MC |
2801 | pkey = X509_get0_pubkey(s->session->peer); |
2802 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { | |
05ec6a25 | 2803 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2804 | return 0; |
2805 | } | |
0f113f3e | 2806 | |
13c0ec4a MC |
2807 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2808 | pms = OPENSSL_malloc(pmslen); | |
2809 | if (pms == NULL) { | |
05ec6a25 | 2810 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE); |
13c0ec4a MC |
2811 | *al = SSL_AD_INTERNAL_ERROR; |
2812 | return 0; | |
2813 | } | |
0bce0b02 | 2814 | |
13c0ec4a MC |
2815 | pms[0] = s->client_version >> 8; |
2816 | pms[1] = s->client_version & 0xff; | |
348240c6 MC |
2817 | /* TODO(size_t): Convert this function */ |
2818 | if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) { | |
13c0ec4a MC |
2819 | goto err; |
2820 | } | |
0f113f3e | 2821 | |
13c0ec4a | 2822 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2823 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
2824 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2825 | goto err; | |
2826 | } | |
13c0ec4a MC |
2827 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2828 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 | |
2829 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2830 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB); |
13c0ec4a MC |
2831 | goto err; |
2832 | } | |
f1ec23c0 MC |
2833 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2834 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
05ec6a25 | 2835 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2836 | goto err; |
2837 | } | |
13c0ec4a MC |
2838 | EVP_PKEY_CTX_free(pctx); |
2839 | pctx = NULL; | |
0f113f3e | 2840 | |
13c0ec4a | 2841 | /* Fix buf for TLS and beyond */ |
f1ec23c0 MC |
2842 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
2843 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); | |
2844 | goto err; | |
b9908bf9 | 2845 | } |
13c0ec4a | 2846 | |
2faa1b48 CB |
2847 | /* Log the premaster secret, if logging is enabled. */ |
2848 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) | |
2849 | goto err; | |
2850 | ||
26fb4b03 RS |
2851 | s->s3->tmp.pms = pms; |
2852 | s->s3->tmp.pmslen = pmslen; | |
2853 | ||
13c0ec4a MC |
2854 | return 1; |
2855 | err: | |
2856 | OPENSSL_clear_free(pms, pmslen); | |
2857 | EVP_PKEY_CTX_free(pctx); | |
2858 | ||
2859 | return 0; | |
2860 | #else | |
05ec6a25 | 2861 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2862 | *al = SSL_AD_INTERNAL_ERROR; |
2863 | return 0; | |
f9b3bff6 | 2864 | #endif |
13c0ec4a MC |
2865 | } |
2866 | ||
f1ec23c0 | 2867 | static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al) |
a8c1c704 MC |
2868 | { |
2869 | #ifndef OPENSSL_NO_DH | |
2870 | DH *dh_clnt = NULL; | |
2871 | const BIGNUM *pub_key; | |
2872 | EVP_PKEY *ckey = NULL, *skey = NULL; | |
f1ec23c0 | 2873 | unsigned char *keybytes = NULL; |
a8c1c704 MC |
2874 | |
2875 | skey = s->s3->peer_tmp; | |
f1ec23c0 MC |
2876 | if (skey == NULL) |
2877 | goto err; | |
2878 | ||
0a699a07 | 2879 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2880 | if (ckey == NULL) |
2881 | goto err; | |
2882 | ||
a8c1c704 MC |
2883 | dh_clnt = EVP_PKEY_get0_DH(ckey); |
2884 | ||
0f1e51ea | 2885 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0) |
f1ec23c0 | 2886 | goto err; |
a8c1c704 MC |
2887 | |
2888 | /* send off the data */ | |
2889 | DH_get0_key(dh_clnt, &pub_key, NULL); | |
b2b3024e | 2890 | if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes)) |
f1ec23c0 MC |
2891 | goto err; |
2892 | ||
2893 | BN_bn2bin(pub_key, keybytes); | |
a8c1c704 MC |
2894 | EVP_PKEY_free(ckey); |
2895 | ||
2896 | return 1; | |
f1ec23c0 MC |
2897 | err: |
2898 | EVP_PKEY_free(ckey); | |
2899 | #endif | |
05ec6a25 | 2900 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); |
a8c1c704 MC |
2901 | *al = SSL_AD_INTERNAL_ERROR; |
2902 | return 0; | |
a8c1c704 MC |
2903 | } |
2904 | ||
f1ec23c0 | 2905 | static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al) |
67ad5aab MC |
2906 | { |
2907 | #ifndef OPENSSL_NO_EC | |
2908 | unsigned char *encodedPoint = NULL; | |
348240c6 | 2909 | size_t encoded_pt_len = 0; |
67ad5aab | 2910 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 2911 | int ret = 0; |
67ad5aab MC |
2912 | |
2913 | skey = s->s3->peer_tmp; | |
ec24630a | 2914 | if (skey == NULL) { |
05ec6a25 | 2915 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2916 | return 0; |
2917 | } | |
2918 | ||
0a699a07 | 2919 | ckey = ssl_generate_pkey(skey); |
b599ce3b MC |
2920 | if (ckey == NULL) { |
2921 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE); | |
2922 | goto err; | |
2923 | } | |
67ad5aab | 2924 | |
0f1e51ea | 2925 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
05ec6a25 | 2926 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB); |
67ad5aab MC |
2927 | goto err; |
2928 | } | |
2929 | ||
2930 | /* Generate encoding of client key */ | |
ec24630a | 2931 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint); |
67ad5aab MC |
2932 | |
2933 | if (encoded_pt_len == 0) { | |
05ec6a25 | 2934 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); |
67ad5aab MC |
2935 | goto err; |
2936 | } | |
2937 | ||
b2b3024e | 2938 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
f1ec23c0 MC |
2939 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
2940 | goto err; | |
2941 | } | |
67ad5aab | 2942 | |
f1ec23c0 | 2943 | ret = 1; |
67ad5aab | 2944 | err: |
f1ec23c0 | 2945 | OPENSSL_free(encodedPoint); |
67ad5aab | 2946 | EVP_PKEY_free(ckey); |
f1ec23c0 | 2947 | return ret; |
67ad5aab | 2948 | #else |
05ec6a25 | 2949 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
2950 | *al = SSL_AD_INTERNAL_ERROR; |
2951 | return 0; | |
2952 | #endif | |
2953 | } | |
2954 | ||
f1ec23c0 | 2955 | static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al) |
e00e0b3d MC |
2956 | { |
2957 | #ifndef OPENSSL_NO_GOST | |
2958 | /* GOST key exchange message creation */ | |
2959 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
2960 | X509 *peer_cert; | |
2961 | size_t msglen; | |
2962 | unsigned int md_len; | |
2963 | unsigned char shared_ukm[32], tmp[256]; | |
2964 | EVP_MD_CTX *ukm_hash = NULL; | |
2965 | int dgst_nid = NID_id_GostR3411_94; | |
2966 | unsigned char *pms = NULL; | |
2967 | size_t pmslen = 0; | |
2968 | ||
2969 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2970 | dgst_nid = NID_id_GostR3411_2012_256; | |
2971 | ||
2972 | /* | |
1ee4b98e | 2973 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
2974 | */ |
2975 | peer_cert = s->session->peer; | |
2976 | if (!peer_cert) { | |
2977 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
05ec6a25 | 2978 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, |
e00e0b3d MC |
2979 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); |
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); | |
2984 | if (pkey_ctx == NULL) { | |
2985 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 2986 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
e00e0b3d MC |
2987 | return 0; |
2988 | } | |
2989 | /* | |
2990 | * If we have send a certificate, and certificate key | |
2991 | * parameters match those of server certificate, use | |
2992 | * certificate key for key exchange | |
2993 | */ | |
2994 | ||
2995 | /* Otherwise, generate ephemeral key pair */ | |
2996 | pmslen = 32; | |
2997 | pms = OPENSSL_malloc(pmslen); | |
2998 | if (pms == NULL) { | |
2999 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3000 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE); |
2f3930bc | 3001 | goto err; |
e00e0b3d MC |
3002 | } |
3003 | ||
3004 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 MC |
3005 | /* Generate session key |
3006 | * TODO(size_t): Convert this function | |
3007 | */ | |
3008 | || RAND_bytes(pms, (int)pmslen) <= 0) { | |
e00e0b3d | 3009 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 3010 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3011 | goto err; |
3012 | }; | |
e00e0b3d MC |
3013 | /* |
3014 | * Compute shared IV and store it in algorithm-specific context | |
3015 | * data | |
3016 | */ | |
3017 | ukm_hash = EVP_MD_CTX_new(); | |
3018 | if (ukm_hash == NULL | |
a230b26e EK |
3019 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
3020 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
3021 | SSL3_RANDOM_SIZE) <= 0 | |
3022 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
3023 | SSL3_RANDOM_SIZE) <= 0 | |
3024 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
e00e0b3d | 3025 | *al = SSL_AD_INTERNAL_ERROR; |
05ec6a25 | 3026 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3027 | goto err; |
3028 | } | |
3029 | EVP_MD_CTX_free(ukm_hash); | |
3030 | ukm_hash = NULL; | |
3031 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
3032 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { | |
3033 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3034 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3035 | goto err; |
3036 | } | |
3037 | /* Make GOST keytransport blob message */ | |
3038 | /* | |
3039 | * Encapsulate it into sequence | |
3040 | */ | |
e00e0b3d MC |
3041 | msglen = 255; |
3042 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
3043 | *al = SSL_AD_INTERNAL_ERROR; | |
05ec6a25 | 3044 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3045 | goto err; |
3046 | } | |
f1ec23c0 | 3047 | |
08029dfa MC |
3048 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3049 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3050 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
f1ec23c0 MC |
3051 | *al = SSL_AD_INTERNAL_ERROR; |
3052 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); | |
3053 | goto err; | |
e00e0b3d | 3054 | } |
f1ec23c0 | 3055 | |
e00e0b3d MC |
3056 | EVP_PKEY_CTX_free(pkey_ctx); |
3057 | s->s3->tmp.pms = pms; | |
3058 | s->s3->tmp.pmslen = pmslen; | |
3059 | ||
3060 | return 1; | |
3061 | err: | |
3062 | EVP_PKEY_CTX_free(pkey_ctx); | |
3063 | OPENSSL_clear_free(pms, pmslen); | |
3064 | EVP_MD_CTX_free(ukm_hash); | |
3065 | return 0; | |
3066 | #else | |
05ec6a25 | 3067 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3068 | *al = SSL_AD_INTERNAL_ERROR; |
3069 | return 0; | |
3070 | #endif | |
3071 | } | |
3072 | ||
f1ec23c0 | 3073 | static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al) |
840a2bf8 | 3074 | { |
8b9546c7 | 3075 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3076 | unsigned char *abytes = NULL; |
3077 | ||
3078 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3079 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3080 | &abytes)) { | |
05ec6a25 | 3081 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3082 | return 0; |
3083 | } | |
f1ec23c0 MC |
3084 | BN_bn2bin(s->srp_ctx.A, abytes); |
3085 | ||
840a2bf8 MC |
3086 | OPENSSL_free(s->session->srp_username); |
3087 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3088 | if (s->session->srp_username == NULL) { | |
05ec6a25 | 3089 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE); |
840a2bf8 MC |
3090 | return 0; |
3091 | } | |
3092 | ||
3093 | return 1; | |
3094 | #else | |
05ec6a25 | 3095 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3096 | *al = SSL_AD_INTERNAL_ERROR; |
3097 | return 0; | |
3098 | #endif | |
3099 | } | |
3100 | ||
7cea05dc | 3101 | int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt) |
13c0ec4a | 3102 | { |
13c0ec4a MC |
3103 | unsigned long alg_k; |
3104 | int al = -1; | |
3105 | ||
f1ec23c0 | 3106 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3107 | |
13c0ec4a | 3108 | if ((alg_k & SSL_PSK) |
7cea05dc | 3109 | && !tls_construct_cke_psk_preamble(s, pkt, &al)) |
13c0ec4a MC |
3110 | goto err; |
3111 | ||
f1ec23c0 | 3112 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
7cea05dc | 3113 | if (!tls_construct_cke_rsa(s, pkt, &al)) |
13c0ec4a | 3114 | goto err; |
a8c1c704 | 3115 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
7cea05dc | 3116 | if (!tls_construct_cke_dhe(s, pkt, &al)) |
b9908bf9 | 3117 | goto err; |
67ad5aab | 3118 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
7cea05dc | 3119 | if (!tls_construct_cke_ecdhe(s, pkt, &al)) |
ce0c1f2b | 3120 | goto err; |
e00e0b3d | 3121 | } else if (alg_k & SSL_kGOST) { |
7cea05dc | 3122 | if (!tls_construct_cke_gost(s, pkt, &al)) |
a71edf3b | 3123 | goto err; |
840a2bf8 | 3124 | } else if (alg_k & SSL_kSRP) { |
7cea05dc | 3125 | if (!tls_construct_cke_srp(s, pkt, &al)) |
69f68237 | 3126 | goto err; |
4a424545 | 3127 | } else if (!(alg_k & SSL_kPSK)) { |
fb34a0f4 | 3128 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 MC |
3129 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
3130 | goto err; | |
3131 | } | |
3132 | ||
b9908bf9 | 3133 | return 1; |
0f113f3e | 3134 | err: |
13c0ec4a MC |
3135 | if (al != -1) |
3136 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0bce0b02 | 3137 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen); |
76106e60 | 3138 | s->s3->tmp.pms = NULL; |
7689082b DSH |
3139 | #ifndef OPENSSL_NO_PSK |
3140 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
3141 | s->s3->tmp.psk = NULL; | |
0f113f3e | 3142 | #endif |
b9908bf9 MC |
3143 | return 0; |
3144 | } | |
3145 | ||
3146 | int tls_client_key_exchange_post_work(SSL *s) | |
3147 | { | |
3148 | unsigned char *pms = NULL; | |
3149 | size_t pmslen = 0; | |
3150 | ||
6f137370 MC |
3151 | pms = s->s3->tmp.pms; |
3152 | pmslen = s->s3->tmp.pmslen; | |
3153 | ||
b9908bf9 MC |
3154 | #ifndef OPENSSL_NO_SRP |
3155 | /* Check for SRP */ | |
3156 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3157 | if (!srp_generate_client_master_secret(s)) { | |
3158 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
3159 | ERR_R_INTERNAL_ERROR); | |
3160 | goto err; | |
3161 | } | |
3162 | return 1; | |
3163 | } | |
3164 | #endif | |
b9908bf9 MC |
3165 | |
3166 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
3167 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3168 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
3169 | goto err; | |
3170 | } | |
3171 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
3172 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3173 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
6f137370 MC |
3174 | /* ssl_generate_master_secret frees the pms even on error */ |
3175 | pms = NULL; | |
3176 | pmslen = 0; | |
b9908bf9 MC |
3177 | goto err; |
3178 | } | |
6f137370 MC |
3179 | pms = NULL; |
3180 | pmslen = 0; | |
473483d4 MC |
3181 | |
3182 | #ifndef OPENSSL_NO_SCTP | |
3183 | if (SSL_IS_DTLS(s)) { | |
3184 | unsigned char sctpauthkey[64]; | |
3185 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
3186 | ||
3187 | /* | |
3188 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3189 | * used. | |
3190 | */ | |
141eb8c6 MC |
3191 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3192 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
3193 | |
3194 | if (SSL_export_keying_material(s, sctpauthkey, | |
a230b26e EK |
3195 | sizeof(sctpauthkey), labelbuffer, |
3196 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
473483d4 MC |
3197 | goto err; |
3198 | ||
3199 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
3200 | sizeof(sctpauthkey), sctpauthkey); | |
3201 | } | |
3202 | #endif | |
3203 | ||
b9908bf9 MC |
3204 | return 1; |
3205 | err: | |
3206 | OPENSSL_clear_free(pms, pmslen); | |
3207 | s->s3->tmp.pms = NULL; | |
3208 | return 0; | |
0f113f3e | 3209 | } |
d02b48c6 | 3210 | |
0f113f3e MC |
3211 | /* |
3212 | * Check a certificate can be used for client authentication. Currently check | |
3213 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3214 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3215 | */ |
3216 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 3217 | { |
0f113f3e | 3218 | /* If no suitable signature algorithm can't use certificate */ |
ad4dd362 | 3219 | if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL) |
0f113f3e MC |
3220 | return 0; |
3221 | /* | |
3222 | * If strict mode check suitability of chain before using it. This also | |
3223 | * adjusts suite B digest if necessary. | |
3224 | */ | |
3225 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3226 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3227 | return 0; | |
0f113f3e MC |
3228 | return 1; |
3229 | } | |
0d609395 | 3230 | |
be3583fa | 3231 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
3232 | { |
3233 | X509 *x509 = NULL; | |
3234 | EVP_PKEY *pkey = NULL; | |
3235 | int i; | |
3236 | ||
b9908bf9 | 3237 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3238 | /* Let cert callback update client certificates if required */ |
3239 | if (s->cert->cert_cb) { | |
3240 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3241 | if (i < 0) { | |
3242 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3243 | return WORK_MORE_A; |
0f113f3e MC |
3244 | } |
3245 | if (i == 0) { | |
3246 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3247 | ossl_statem_set_error(s); |
0f113f3e MC |
3248 | return 0; |
3249 | } | |
3250 | s->rwstate = SSL_NOTHING; | |
3251 | } | |
3252 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3253 | return WORK_FINISHED_CONTINUE; |
3254 | ||
3255 | /* Fall through to WORK_MORE_B */ | |
3256 | wst = WORK_MORE_B; | |
0f113f3e MC |
3257 | } |
3258 | ||
3259 | /* We need to get a client cert */ | |
b9908bf9 | 3260 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3261 | /* |
3262 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3263 | * return(-1); We then get retied later | |
3264 | */ | |
0f113f3e MC |
3265 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3266 | if (i < 0) { | |
3267 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3268 | return WORK_MORE_B; |
0f113f3e MC |
3269 | } |
3270 | s->rwstate = SSL_NOTHING; | |
3271 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3272 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3273 | i = 0; | |
3274 | } else if (i == 1) { | |
3275 | i = 0; | |
b9908bf9 | 3276 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3277 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3278 | } | |
3279 | ||
222561fe | 3280 | X509_free(x509); |
25aaa98a | 3281 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3282 | if (i && !ssl3_check_client_certificate(s)) |
3283 | i = 0; | |
3284 | if (i == 0) { | |
3285 | if (s->version == SSL3_VERSION) { | |
3286 | s->s3->tmp.cert_req = 0; | |
3287 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3288 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3289 | } else { |
3290 | s->s3->tmp.cert_req = 2; | |
124037fd | 3291 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3292 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3293 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3294 | return 0; |
3295 | } | |
0f113f3e MC |
3296 | } |
3297 | } | |
3298 | ||
b9908bf9 | 3299 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3300 | } |
3301 | ||
b9908bf9 MC |
3302 | /* Shouldn't ever get here */ |
3303 | return WORK_ERROR; | |
3304 | } | |
3305 | ||
7cea05dc | 3306 | int tls_construct_client_certificate(SSL *s, WPACKET *pkt) |
b9908bf9 | 3307 | { |
0baed5e9 | 3308 | int al = SSL_AD_INTERNAL_ERROR; |
e96e0f8e MC |
3309 | |
3310 | /* | |
3311 | * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in | |
3312 | * later | |
3313 | */ | |
3314 | if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) | |
3315 | || !ssl3_output_cert_chain(s, pkt, | |
b90506e9 | 3316 | (s->s3->tmp.cert_req == 2) ? NULL |
e96e0f8e MC |
3317 | : s->cert->key, |
3318 | &al)) { | |
b9908bf9 | 3319 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
f7e393be MC |
3320 | goto err; |
3321 | } | |
3322 | ||
3323 | if (SSL_IS_TLS13(s) | |
3324 | && SSL_IS_FIRST_HANDSHAKE(s) | |
3325 | && (!s->method->ssl3_enc->change_cipher_state(s, | |
3326 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3327 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, | |
3328 | SSL_R_CANNOT_CHANGE_CIPHER); | |
c31ad0bb BE |
3329 | /* |
3330 | * This is a fatal error, which leaves | |
3331 | * enc_write_ctx in an inconsistent state | |
3332 | * and thus ssl3_send_alert may crash. | |
3333 | */ | |
3334 | return 0; | |
0f113f3e | 3335 | } |
b9908bf9 MC |
3336 | |
3337 | return 1; | |
f7e393be MC |
3338 | err: |
3339 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3340 | return 0; | |
0f113f3e MC |
3341 | } |
3342 | ||
3343 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3344 | |
36d16f8e | 3345 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3346 | { |
60f43e9e RL |
3347 | int i; |
3348 | #ifndef OPENSSL_NO_EC | |
3349 | int idx; | |
3350 | #endif | |
0f113f3e MC |
3351 | long alg_k, alg_a; |
3352 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 3353 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3354 | |
0f113f3e MC |
3355 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3356 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3357 | |
0f113f3e | 3358 | /* we don't have a certificate */ |
55a9a16f | 3359 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3360 | return (1); |
d02b48c6 | 3361 | |
0f113f3e | 3362 | /* This is the passed certificate */ |
d02b48c6 | 3363 | |
10bf4fc2 | 3364 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3365 | idx = s->session->peer_type; |
b2021556 | 3366 | if (idx == SSL_PKEY_ECC || idx == SSL_PKEY_ED25519) { |
a273c6ee | 3367 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3368 | /* check failed */ |
3369 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3370 | goto f_err; | |
3371 | } else { | |
3372 | return 1; | |
3373 | } | |
3374 | } else if (alg_a & SSL_aECDSA) { | |
3375 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3376 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3377 | goto f_err; | |
0f113f3e MC |
3378 | } |
3379 | #endif | |
8382fd3a | 3380 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3381 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3382 | |
3383 | /* Check that we have a certificate if we require one */ | |
3384 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3385 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3386 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3387 | goto f_err; | |
3388 | } | |
bc36ee62 | 3389 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3390 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3391 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3392 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3393 | goto f_err; | |
3394 | } | |
d02b48c6 | 3395 | #endif |
bc36ee62 | 3396 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3397 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3398 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3399 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3400 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3401 | goto f_err; | |
0f113f3e | 3402 | } |
79df9d62 | 3403 | #endif |
bc36ee62 | 3404 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3405 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3406 | al = SSL_AD_INTERNAL_ERROR; |
3407 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3408 | goto f_err; |
0f113f3e | 3409 | } |
d02b48c6 RE |
3410 | #endif |
3411 | ||
0f113f3e MC |
3412 | return (1); |
3413 | f_err: | |
26c79d56 | 3414 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3415 | return (0); |
3416 | } | |
3417 | ||
e481f9b9 | 3418 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 3419 | int tls_construct_next_proto(SSL *s, WPACKET *pkt) |
b9908bf9 | 3420 | { |
15e6be6c MC |
3421 | size_t len, padding_len; |
3422 | unsigned char *padding = NULL; | |
15e6be6c | 3423 | |
aff8c126 | 3424 | len = s->ext.npn_len; |
b9908bf9 | 3425 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3426 | |
aff8c126 | 3427 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3428 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
15e6be6c MC |
3429 | SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR); |
3430 | goto err; | |
3431 | } | |
3432 | ||
3433 | memset(padding, 0, padding_len); | |
3434 | ||
b9908bf9 | 3435 | return 1; |
15e6be6c | 3436 | err: |
15e6be6c MC |
3437 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3438 | return 0; | |
b9908bf9 | 3439 | } |
6434abbf | 3440 | #endif |
368888bc | 3441 | |
c7f47786 MC |
3442 | MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt) |
3443 | { | |
3444 | if (PACKET_remaining(pkt) > 0) { | |
3445 | /* should contain no data */ | |
3446 | SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH); | |
3447 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
3448 | ossl_statem_set_error(s); | |
3449 | return MSG_PROCESS_ERROR; | |
3450 | } | |
3451 | ||
db0f35dd TS |
3452 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3453 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3454 | return MSG_PROCESS_FINISHED_READING; | |
3455 | } | |
3456 | ||
c7f47786 | 3457 | /* |
1f04f23e MC |
3458 | * This is a historical discrepancy (not in the RFC) maintained for |
3459 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3460 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3461 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3462 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 MC |
3463 | */ |
3464 | if (SSL_IS_DTLS(s)) | |
3465 | SSL_renegotiate(s); | |
3466 | else | |
3467 | SSL_renegotiate_abbreviated(s); | |
3468 | ||
3469 | return MSG_PROCESS_FINISHED_READING; | |
3470 | } | |
3471 | ||
e46f2334 MC |
3472 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt) |
3473 | { | |
3474 | int al = SSL_AD_INTERNAL_ERROR; | |
3475 | PACKET extensions; | |
3434f40b | 3476 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3477 | |
26b9172a MC |
3478 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3479 | || PACKET_remaining(pkt) != 0) { | |
e46f2334 MC |
3480 | al = SSL_AD_DECODE_ERROR; |
3481 | SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH); | |
3482 | goto err; | |
3483 | } | |
3484 | ||
fe874d27 MC |
3485 | if (!tls_collect_extensions(s, &extensions, |
3486 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
735d5b59 | 3487 | &al, NULL, 1) |
fe874d27 | 3488 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
735d5b59 | 3489 | rawexts, NULL, 0, &al, 1)) |
3434f40b MC |
3490 | goto err; |
3491 | ||
1b0286a3 | 3492 | OPENSSL_free(rawexts); |
e46f2334 MC |
3493 | return MSG_PROCESS_CONTINUE_READING; |
3494 | ||
3495 | err: | |
3496 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
3497 | ossl_statem_set_error(s); | |
1b0286a3 | 3498 | OPENSSL_free(rawexts); |
e46f2334 MC |
3499 | return MSG_PROCESS_ERROR; |
3500 | } | |
3501 | ||
368888bc | 3502 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3503 | { |
3504 | int i = 0; | |
368888bc | 3505 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3506 | if (s->ctx->client_cert_engine) { |
3507 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3508 | SSL_get_client_CA_list(s), | |
3509 | px509, ppkey, NULL, NULL, NULL); | |
3510 | if (i != 0) | |
3511 | return i; | |
3512 | } | |
3513 | #endif | |
3514 | if (s->ctx->client_cert_cb) | |
3515 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3516 | return i; | |
3517 | } | |
d45ba43d | 3518 | |
ae2f7b37 | 3519 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt) |
d45ba43d | 3520 | { |
2c7b4dbc | 3521 | int i; |
aafec89c | 3522 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d MC |
3523 | int empty_reneg_info_scsv = !s->renegotiate; |
3524 | /* Set disabled masks for this session */ | |
3525 | ssl_set_client_disabled(s); | |
3526 | ||
3527 | if (sk == NULL) | |
3528 | return (0); | |
d45ba43d | 3529 | |
2c7b4dbc MC |
3530 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3531 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3532 | # error Max cipher length too short | |
3533 | # endif | |
3534 | /* | |
3535 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3536 | * chop number of supported ciphers to keep it well below this if we | |
3537 | * use TLS v1.2 | |
3538 | */ | |
3539 | if (TLS1_get_version(s) >= TLS1_2_VERSION) | |
3540 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
3541 | else | |
3542 | #endif | |
3543 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3544 | maxlen = 0xfffe; | |
3545 | ||
3546 | if (empty_reneg_info_scsv) | |
3547 | maxlen -= 2; | |
3548 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3549 | maxlen -= 2; | |
3550 | ||
3551 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3552 | const SSL_CIPHER *c; | |
3553 | ||
d45ba43d MC |
3554 | c = sk_SSL_CIPHER_value(sk, i); |
3555 | /* Skip disabled ciphers */ | |
8af91fd9 | 3556 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3557 | continue; |
2c7b4dbc MC |
3558 | |
3559 | if (!s->method->put_cipher_by_char(c, pkt, &len)) { | |
3560 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3561 | return 0; | |
3562 | } | |
3563 | ||
aafec89c MC |
3564 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3565 | if (!maxverok) { | |
3566 | if (SSL_IS_DTLS(s)) { | |
3567 | if (DTLS_VERSION_GE(c->max_dtls, s->s3->tmp.max_ver) | |
3568 | && DTLS_VERSION_LE(c->min_dtls, s->s3->tmp.max_ver)) | |
3569 | maxverok = 1; | |
3570 | } else { | |
3571 | if (c->max_tls >= s->s3->tmp.max_ver | |
3572 | && c->min_tls <= s->s3->tmp.max_ver) | |
3573 | maxverok = 1; | |
3574 | } | |
3575 | } | |
3576 | ||
2c7b4dbc | 3577 | totlen += len; |
d45ba43d | 3578 | } |
2c7b4dbc | 3579 | |
aafec89c | 3580 | if (totlen == 0 || !maxverok) { |
2c7b4dbc | 3581 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE); |
aafec89c MC |
3582 | |
3583 | if (!maxverok) | |
3584 | ERR_add_error_data(1, "No ciphers enabled for max supported " | |
3585 | "SSL/TLS version"); | |
3586 | ||
2c7b4dbc MC |
3587 | return 0; |
3588 | } | |
3589 | ||
3590 | if (totlen != 0) { | |
d45ba43d MC |
3591 | if (empty_reneg_info_scsv) { |
3592 | static SSL_CIPHER scsv = { | |
3593 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3594 | }; | |
2c7b4dbc MC |
3595 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3596 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3597 | return 0; | |
3598 | } | |
d45ba43d MC |
3599 | } |
3600 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3601 | static SSL_CIPHER scsv = { | |
3602 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3603 | }; | |
2c7b4dbc MC |
3604 | if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) { |
3605 | SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR); | |
3606 | return 0; | |
3607 | } | |
d45ba43d MC |
3608 | } |
3609 | } | |
3610 | ||
2c7b4dbc | 3611 | return 1; |
d45ba43d | 3612 | } |
ef6c191b MC |
3613 | |
3614 | int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt) | |
3615 | { | |
3616 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3617 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
3618 | SSLerr(SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA, | |
3619 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3620 | return 0; | |
3621 | } | |
3622 | ||
3623 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
3624 | return 1; | |
3625 | } |